WorldWideScience

Sample records for capsules

  1. Capsule endoscopy

    Science.gov (United States)

    ... It is about the size of a large vitamin pill. The person swallows the capsule, and it takes pictures all the way through ... can be started in the doctor's office. The capsule is the size of a large vitamin pill, about an inch (2.5 centimeters) long ...

  2. Capsule endoscopy

    Institute of Scientific and Technical Information of China (English)

    Miguel Mu(n)oz-Navas

    2009-01-01

    Capsule endoscopy (CE) is a simple, safe, non-invasive, reliable technique, well accepted and tolerated by the patients, which allows complete exploration of the small intestine. The advent of CE in 2000 has dramatically changed the diagnosis and management of many diseases of the small intestine, such as obscure gastrointestinal bleeding, Crohn's disease, small bowel tumors, polyposis syndromes, etc. CE has become the gold standard for the diagnosis of most diseases of the small bowel. Lately this technique has also been used for esophageal and colonic diseases.

  3. Esophageal capsule endoscopy

    Institute of Scientific and Technical Information of China (English)

    Ignacio Fernandez-Urien; Cristina Carretero; Raul Armendariz; Miguel Mu(n)oz-Navas

    2008-01-01

    Capsule endoscopy is now considered as the first imaging tool for small bowel examination.Recently,new capsule endoscopy applications have been developed,such as esophageal capsule endoscopy and colon capsule endoscopy.Esophageal capsule endoscopy in patients with suspected esophageal disorders is feasible and safe,and could be also an alternative procedure in those patients refusing upper endoscopy.Although large-scale studies are needed to confirm its utility in GERD and cirrhotic patients,current results are encouraging and open a new era in esophageal examination.

  4. Colon capsule endoscopy

    Institute of Scientific and Technical Information of China (English)

    Ignacio Fernandez-Urien; Cristina Carretero; Ana Borda; Miguel Mu(n)oz-Navas

    2008-01-01

    Wireless capsule endoscopy has become the first imaging tool for small bowel examination.Recently,new capsule endoscopy applications have been developed,such as esophageal capsule endoscopy and colon capsule endoscopy.Clinical trials results have shown that colon capsule endoscopy is feasible,accurate and safe in patients suffering from colonic diseases.It could be a good alternative in patients refusing conventional colonoscopy or when it is contraindicated.Upcoming studies are needed to demonstrate its utilty for colon cancer screening and other indications such us ulcerative colitis.Comparative studies including both conventional and virtual colonoscopy are also required.

  5. Engineering Stable Hollow Capsules

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    @@ Scientists at the CAS Institute of Chemistry have been succeeded in fabricating stable hollow capsules by extending covalent layer-by-layer self-assembly(CSA)technique from 2-dimensional to 3-dimensional systems.

  6. Capsule contraction syndrome

    Directory of Open Access Journals (Sweden)

    Mesut COŞKUN

    2009-06-01

    Full Text Available Capsule contraction syndrome occurs after fibrous metaplasia of lens proteins that leads to capsular bag contraction. Excessive front capsular wrinkling is seen in capsule contraction syndrome and there is an imbalance between powers supplying capsular integrity. This situation leads to zonular weakness. Capsule contraction syndrome is associated with pseudoexfoliation, older age, uveitis, pars planitis and myotonic muscular dystrophy. In order to decrease the risk of capsule contraction syndrome, front capsulerhexis area should be open as 5.5-6 mm diameter and a curysoft intraocular lens should be used. In order to prevent lens epithelial proliferation and metaplasia, lens epithelial cells at inferior surface of front capsule should be aspirated carefully. If postoperative capsular contraction detected, front capsulotomy should be performed by Nd-YAG laser at postoperative 2 to 3 weeks. In patients that Nd-YAG laser is unsuccessful, capsular tension should be decreased by surgical microincisions. In present study, we evaluated etiology, prevention and management of capsule contraction syndrome in the light of actual literature knowledge.

  7. NIF capsule performance modeling

    Directory of Open Access Journals (Sweden)

    Weber S.

    2013-11-01

    Full Text Available Post-shot modeling of NIF capsule implosions was performed in order to validate our physical and numerical models. Cryogenic layered target implosions and experiments with surrogate targets produce an abundance of capsule performance data including implosion velocity, remaining ablator mass, times of peak x-ray and neutron emission, core image size, core symmetry, neutron yield, and x-ray spectra. We have attempted to match the integrated data set with capsule-only simulations by adjusting the drive and other physics parameters within expected uncertainties. The simulations include interface roughness, time-dependent symmetry, and a model of mix. We were able to match many of the measured performance parameters for a selection of shots.

  8. Wireless capsule endoscopy

    Institute of Scientific and Technical Information of China (English)

    A Mata; J Llach; JM Bordas

    2008-01-01

    Wireless capsule endoscopy is a new technique that allows complete exploration of the small bowel without external wires. Its role has been analyzed in many small bowel diseases such as obscure gastrointestinal bleeding, Crohn's disease and gastrointestinal polyposis syndromes with promising results. Studies on other pathologies (I.e. Small bowel tumour, celiac disease) are under evaluation to define the role of this technique.

  9. Management of adhesive capsulitis

    Directory of Open Access Journals (Sweden)

    Stupay KL

    2015-08-01

    Full Text Available Kristen L Stupay,1 Andrew S Neviaser2 1Tulane University School of Medicine, New Orleans, LA, USA; 2George Washington University Medical Faculty Associates, Washington, DC, USA Abstract: Adhesive capsulitis of the shoulder is a condition of capsular contracture that reduces both active and passive glenohumeral motion. The cause of adhesive capsulitis is not known but it is strongly associated with endocrine abnormalities such as diabetes. Diverse terminology and the absence of definitive criteria for diagnosis make evaluating treatment modalities difficult. Many treatment methods have been reported, most with some success, but few have been proved to alter the natural course of this disease. Most afflicted patients will achieve acceptable shoulder function without surgery. Those who remain debilitated after 8–12 months are reasonable candidates for invasive treatments. Here, the various treatment methods and the data to support their use are reviewed. Keywords: frozen shoulder, stiff shoulder, periarthritis, painful shoulder 

  10. Capsule-train stability

    Science.gov (United States)

    Bryngelson, Spencer H.; Freund, Jonathan B.

    2016-07-01

    Elastic capsules flowing in small enough tubes, such as red blood cells in capillaries, are well known to line up into regular single-file trains. The stability of such trains in somewhat wider channels, where this organization is not observed, is studied in a two-dimensional model system that includes full coupling between the viscous flow and suspended capsules. A diverse set of linearly amplifying disturbances, both long-time asymptotic (modal) and transient (nonmodal) perturbations, is identified and analyzed. These have a range of amplification rates and their corresponding forms are wavelike, typically dominated by one of five principal perturbation classes: longitudinal and transverse translations, tilts, and symmetric and asymmetric shape distortions. Finite-amplitude transiently amplifying perturbations are shown to provide a mechanism that can bypass slower asymptotic modal linear growth and precipitate the onset of nonlinear effects. Direct numerical simulations are used to verify the linear analysis and track the subsequent transition of the regular capsule trains into an apparently chaotic flow.

  11. Capsule endoscopy in celiac disease

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Video capsule endoscopy is an attractive and patient- friendly tool that provides high quality images of the small bowel. Obscure gastrointestinal bleeding is the primary and most evaluated indication to capsule endoscopy; however, indications are expanding and a small number of preliminary reports have been presented concerning the role of video capsule endoscopy in the diagnosis of celiac disease. The purpose of this review is to update the current knowledge and to hypothesize on future perspectives of the use of video capsule endoscopy in patients with celiac disease.

  12. Optimal Design of Capsule Transporting Pipeline carrying Spherical Capsules

    Science.gov (United States)

    Asim, Taimoor; Mishra, Rakesh; Ubbi, Kuldip

    2012-05-01

    A capsule pipeline transports material or cargo in capsules propelled by fluid flowing through a pipeline. The cargo may either be contained in capsules (such as wheat enclosed inside sealed cylindrical containers), or may itself be the capsules (such as coal compressed into the shape of a cylinder or sphere). As the concept of capsule transportation is relatively new, the capsule pipelines need to be designed optimally for commercial viability. An optimal design of such a pipeline would have minimum pressure drop due to the presence of the solid medium in the pipeline, which corresponds to minimum head loss and hence minimum pumping power required to drive the capsules and the transporting fluid. The total cost for the manufacturing and maintenance of such pipelines is yet another important variable that needs to be considered for the widespread commercial acceptance of capsule transporting pipelines. To address this, the optimisation technique presented here is based on the least-cost principle. Pressure drop relationships have been incorporated to calculate the pumping requirements for the system. The maintenance and manufacturing costs have been computed separately to analyse their effects on the optimisation process. A design example has been included to show the usage of the model presented. The results indicate that for a specific throughput, there exists an optimum diameter of the pipeline for which the total cost for the piping system is at its minimum.

  13. Magnetism in metal-organic capsules

    Energy Technology Data Exchange (ETDEWEB)

    Atwood, Jerry L.; Brechin, Euan K; Dalgarno, Scott J.; Inglis, Ross; Jones, Leigh F.; Mossine, Andrew; Paterson, Martin J.; Power, Nicholas P.; Teat, Simon J.

    2010-01-07

    Nickel and cobalt seamed metal-organic capsules have been isolated and studied using structural, magnetic and computational approaches. Antiferromagnetic exchange in the Ni capsule results from coordination environments enforced by the capsule framework.

  14. Summary Report for Capsule Dry Storage Project

    Energy Technology Data Exchange (ETDEWEB)

    JOSEPHSON, W S

    2003-09-04

    There are 1.936 cesium (Cs) and strontium (Sr) capsules stored in pools at the Waste Encapsulation and Storage Facility (WESF). These capsules will be moved to dry storage on the Hanford Site as an interim measure to reduce risk. The Cs/Sr Capsule Dry Storage Project (CDSP) is conducted under the assumption the capsules will eventually be moved to the repository at Yucca Mountain, and the design criteria include requirements that will facilitate acceptance at the repository. The storage system must also permit retrieval of capsules in the event vitrification of the capsule contents is pursued. A cut away drawing of a typical cesium chloride (CsCI) capsule and the capsule property and geometry information are provided in Figure 1.1. Strontium fluoride (SrF{sub 2}) capsules are similar in design to CsCl capsules. Further details of capsule design, current state, and reference information are given later in this report and its references. Capsule production and life history is covered in WMP-16938, Capsule Characterization Report for Capsule Dry Storage Project, and is briefly summarized in Section 5.2 of this report.

  15. Capsule endoscopy of the esophagus.

    Science.gov (United States)

    Waterman, Matti; Gralnek, Ian M

    2009-08-01

    Video capsule endoscopy has acquired wide clinical acceptance since its the US Food and Drug Administration approval in 2001. Recently, the technology of video capsule endoscopy has been adapted to other organs in the gastrointestinal tract, including the esophagus and colon. In this review, we discuss esophageal capsule endoscopy (ECE)-the procedure, its indications, contraindications, safety, and future applications. ECE is a minimally invasive procedure that uses special video capsules with ability to acquire images from 2 cameras with high image storing speed of 14 to 18 frames per second. A special ingestion procedure allows for prolonged esophageal transit time and an optimized view of the gastroesophageal junction. ECE has been shown to have moderately high sensitivity and accuracy in the diagnosis and surveillance of Barrett esophagus in patients with gastroesophageal reflux disease but has not demonstrated superiority to esogastroduodenoscopy in cost-effectiveness models. In patients with portal hypertension, ECE has a sensitivity of 63% to 100% for screening of esophageal varices, but does not seem to be superior to esogastroduodenoscopy in its cost-effectiveness. No serious complications have been reported after ECE although a low rate of esophageal capsule retention (0.7% to 2.2%) has been reported, usually because of unsuspected esophageal strictures. Contraindications to capsule endoscopy include known or suspected gastrointestinal and esophageal obstruction, strictures, or fistulas, intestinal pseudoobstruction, and children under 10 years of age. It is expected that improvements in imaging technology will improve the accuracy of ECE with the development of immunological-based and chemical-based diagnostic capabilities.

  16. Capsule endoscopy in pediatric patients

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Wireless capsule endoscope (WCE) for the investigation of the small bowel is an approved technique both in adults and children (more than 10 years old). The present review provides data on the indications, diagnostic yield, adverse events and limitations of the WCE technique in children and tries to predict the future of WCE usage in this population of patients.

  17. Photon Production Within Storage Capsules

    CERN Document Server

    Rittmann, P D

    2003-01-01

    This report provides tables and electronic worksheets that list the photon production rate within SrF2 and CsC1 storage capsules, particularly the continuous spectrum of bremsstrahlung photons from the slowing down of the emitted electrons (BREMCALC).

  18. Colon Capsule Endoscopy: Review and Perspectives

    Directory of Open Access Journals (Sweden)

    David Friedel

    2016-01-01

    Full Text Available Colon capsule endoscopy utilizing PillCam COLON 2 capsule allows for visualization potentially of the entire colon and is currently approved for patients who cannot withstand the rigors of traditional optical colonoscopy (OC and associated sedation as well as those that had an OC that was incomplete for technical reasons other than a poor preparation. We will then describe the prior experience and current status of colon capsule endoscopy.

  19. Intrauterine fertilization capsules--a clinical trial

    DEFF Research Database (Denmark)

    Lenz, S; Lindenberg, S; Sundberg, K

    1991-01-01

    chorionic gonadotropin. Oocytes were collected by ultrasonically guided transvaginal aspiration, and spermatozoa were prepared by swim-up technique. The gametes were placed in agar capsules 4 hr after oocyte collection, and the capsules were introduced to the uterine fundus using an insertion tube...

  20. The future of wireless capsule endoscopy

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    We outline probable and possible developments with wireless capsule endoscopy. It seems likely that capsule endoscopy will become increasingly effective in diagnostic gastrointestinal endoscopy. This will be attractive to patients especially for cancer or varices detection because capsule endoscopy is painless and is likely to have a higher take up rate compared to conventional colonoscopy and gastroscopy. Double imager capsules with increased frame rates have been used to image the esophagus for Barrett's and esophageal varices. The image quality is not bad but needs to be improved if it is to become a realistic substitute for flexible upper and lower gastrointestinal endoscopy. An increase in the frame rate, angle of view, depth of field, image numbers, duration of the procedure and improvements in illumination seem likely. Colonic, esophageal and gastric capsules will improve in quality, eroding the supremacy of flexible endoscopy, and become embedded into screening programs. Therapeutic capsules will emerge with brushing, cytology, fluid aspiration, biopsy and drug delivery capabilities. Electrocautery may also become possible. Diagnostic capsules will integrate physiological measurements with imaging and optical biopsy, and immunologic cancer recognition. Remote control movement will improve with the use of magnets and/or electrostimulation and perhaps electromechanical methods. External wireless commands will influence capsule diagnosis and therapy and will increasingly entail the use of real-time imaging. However, it should be noted that speculations about the future of technology in any detail are almost always wrong.

  1. How helpful is capsule endoscopy to surgeons?

    Institute of Scientific and Technical Information of China (English)

    Osman Ersoy; Bulent Sivri; Yusuf Bayraktar

    2007-01-01

    Capsule endoscopy is a new technology that, for the first time, allows complete, non-invasive endoscopic imaging of the small bowel. The efficacy of capsule endoscopy in the diagnosis of suspected small bowel diseases has been established. Important applications for surgeons include observations of obscure gastrointestinal bleeding and small bowel neoplasms.

  2. [Karyosphere capsule in Tribolium castaneum oocytes].

    Science.gov (United States)

    Batalova, F M; Bogoliubov, D S

    2013-01-01

    Structure and composition of the karyosphere (karyosome) capsule were studied in the oocytes of a laboratory insect, Tribolium castaneum, with the use of electron microscopy and immunoelectron cytochemistry. Basing on the study of nuclear structure dynamics, we distinguished 8 stages that characterize the period of oocyte growth. At the diplotene stage, T. castaneum oocyte chromosomes conjoin early into a compact karyosphere, but a significant chromatin condensation does not occur. The process of karyosphere formation is accompanied by the development of an extensive extrachromosome capsule surrounding chromatin. The capsule consists of a material of different morphological types. Significant molecular components of the T. castaneum karyosphere capsule are represented by the proteins of nuclear matrix including F-actin and lamin B. Besides the structural proteins, the Sm proteins of small nuclear (sn) RNPs and mature 2,2,7-trimethyl guanosine (TMG) 5'-capped snRNAs are revealed immunocytochemically in the karyosphere capsule. The obtained data can form a basis for further expansion of ideas on the functions of the karyosphere capsule as a specialized extrachromosomal nuclear domain of the oocytes. We believe that the T. castaneum karyosphere capsule plays not only a structural role, but may be involved directly in the processes related to gene expression.

  3. [Evaluation of nopal capsules in diabetes mellitus].

    Science.gov (United States)

    Frati Munari, A C; Vera Lastra, O; Ariza Andraca, C R

    1992-01-01

    To find out if commercial capsules with dried nopal (prickle-pear cactus, Opuntia ficus indica may have a role in the management of diabetes mellitus, three experiments were performed: 30 capsules where given in fasting condition to 10 diabetic subjects and serum glucose was measured through out 3 hours; a control test was performed with 30 placebo capsules. OGTT with previous intake of 30 nopal or placebo capsules was performed in ten healthy individuals. In a crossover and single blinded study 14 diabetic patients withdrew the oral hypoglycemic treatment and received 10 nopal or placebo capsules t.i.d. during one week; serum glucose, cholesterol and tryglycerides levels were measured before and after each one-week period. Five healthy subjects were also studied in the same fashion. Opuntia capsules did not show acute hypoglycemic effect and did not influence OGTT. In diabetic patients serum glucose, cholesterol and tryglycerides levels did not change with Opuntia, but they increased with placebo (P nopal, while cholesterol and triglycerides decreased (P < 0.01 vs. placebo). The intake of 30 Opuntia capsules daily in patients with diabetes mellitus had a discrete beneficial effect on glucose and cholesterol. However this dose is unpractical and at present it is not recommended in the management of diabetes mellitus.

  4. Tag gas capsule with magnetic piercing device

    Science.gov (United States)

    Nelson, Ira V.

    1976-06-22

    An apparatus for introducing a tag (i.e., identifying) gas into a tubular nuclear fuel element. A sealed capsule containing the tag gas is placed in the plenum in the fuel tube between the fuel and the end cap. A ferromagnetic punch having a penetrating point is slidably mounted in the plenum. By external electro-magnets, the punch may be caused to penetrate a thin rupturable end wall of the capsule and release the tag gas into the fuel element. Preferably the punch is slidably mounted within the capsule, which is in turn loaded as a sealed unit into the fuel element.

  5. Required Be Capsule Strength For Room Temperature Transport

    Energy Technology Data Exchange (ETDEWEB)

    Cook, B

    2005-03-21

    The purpose of this memo is to lay out the criteria for the Be capsule strength necessary for room temperature transport. Ultimately we will test full thickness capsules by sealing high pressures inside, but currently we are limited to both thinner capsules and alternative measures of capsule material strength.

  6. Therapeutic Capsule Endoscopy: Opportunities and Challenges

    Directory of Open Access Journals (Sweden)

    Mahdi Rasouli

    2011-01-01

    Full Text Available The increasing demand for non-invasive (or less-invasive monitoring and treatment of medical conditions has attracted both physicians and engineers to work together and investigate new methodologies. Wireless capsule endoscopy is a successful example of such techniques which has become an accepted routine for diagnostic inspection of the gastrointestinal tract. This method offers a non-invasive alternative to traditional endoscopy and provides the opportunity for exploring distal areas of the small intestine which are otherwise not accessible. Despite these advantages, wireless capsule endoscopy is still limited in functionality compared to traditional endoscopy. Wireless capsule endoscopes with advanced functionalities, such as biopsy or drug delivery, are highly desirable. In this article, the current status of wireless capsule endoscopy is reviewed together with some of its possible therapeutic applications as well as the existing challenges.

  7. Dynamics of nonspherical compound capsules in simple shear flow

    Science.gov (United States)

    Luo, Zheng Yuan; Bai, Bo Feng

    2016-10-01

    The dynamics of an initially ellipsoidal compound capsule in a simple shear flow is investigated numerically using a three-dimensional front-tracking finite-difference model. Membrane bending resistance is included based on Helfrich's energy function besides the resistances against shear deformation and area dilatation governed by the constitutive law of Skalak et al. In this paper, we focus specifically on how the presence of a spherical inner capsule and its size affects the characteristics and transition of various dynamical states of nonspherical compound capsules (i.e., the outer capsule). Significant differences in the dynamical characteristics are observed between compound capsules and homogeneous capsules in both qualitative and quantitative terms. We find the transition from swinging to tumbling can occur at vanishing viscosity mismatch through increasing the inner capsule size alone to a critical value regardless of the initial shape of the nonspherical compound capsule (i.e., prolate or oblate). Besides, for compound capsules with viscosity mismatch, the critical viscosity ratio for the swinging-to-tumbling transition remarkably decreases by increasing the inner capsule size. It is thus concluded that the inner capsule size is a key governing parameter of compound capsule dynamics apart from the capillary number, aspect ratio, and viscosity ratio that have been long identified for homogeneous capsules. Further, we discuss the mechanisms underlying the effects of the inner capsule on the compound capsule dynamics from the viewpoint of the effective viscosity of internal fluid and find that the effects of the inner capsule on compound capsule dynamics are qualitatively similar to that of increasing the internal viscosity on homogeneous capsule dynamics. However, in quantitative terms, the compound capsule cannot be viewed as a homogeneous capsule with higher viscosity as obvious inhomogeneity in fluid stress distribution is induced by the inner membrane.

  8. Systematic Design of edical Capsule Robots

    OpenAIRE

    Beccani, M; Tunc, H; Taddese, AZ; Susilo, E; Volgiesi, P; Ledeczi, A; Valdastri, P

    2015-01-01

    Medical capsule robots that navigate inside the body as diagnostic and interventional tools are an emerging and challenging research area within medical CPSs. These robots must provide locomotion, sensing, actuation, and communication within severe size, power, and computational constraints. This paper presents the first effort for an open architecture, platform design, software infrastructure, and a supporting modular design environment for medical capsule robots to further this research area.

  9. Capsule endoscopy in neoplastic diseases

    Institute of Scientific and Technical Information of China (English)

    Marco Pennazio; Emanuele Rondonotti; Roberto de Franchis

    2008-01-01

    Until recently,diagnosis and management of small-bowel tumors were delayed by the difficulty of access to the small bowel and the poor diagnostic capabilities of the available diagnostic techniques.An array of new methods has recently been developed,increasing the possibility of detecting these tumors at an earlier stage.Capsule endoscopy (CE) appears to be an ideal tool to recognize the presence of neoplastic lesions along this organ,since it is non-invasive and enables the entire small bowel to be visualized.Highquality images of the small-bowel mucosa may be captured and small and fiat lesions recognized,without exposure to radiation.Recent studies on a large population of patients undergoing CE have reported small-bowel tumor frequency only slightly above that reported in previous surgical series (range,1.6%-2.4%)and have also confirmed that the main clinical indication to CE in patients with small-bowel tumors is obscure gastrointestinal (GI) bleeding.The majority of tumors identified by CE are malignant;many were unsuspected and not found by other methods.However,it remains difficult to identify pathology and tumor type based on the lesion's endoscopic appearance.Despite its limitations,CE provides crucial information leading in most cases to changes in subsequent patient management.Whether the use of CE in combination with other new diagnostic (MRI or multidetector CT enterography) and therapeutic (Push-and-pull enteroscopy) techniques will lead to earlier diagnosis and treatment of these neoplasms,ultimately resulting in a survival advantage and in cost savings,remains to be determined through carefully-designed studies.

  10. Scaling effects in spiral capsule robots.

    Science.gov (United States)

    Liang, Liang; Hu, Rong; Chen, Bai; Tang, Yong; Xu, Yan

    2017-04-01

    Spiral capsule robots can be applied to human gastrointestinal tracts and blood vessels. Because of significant variations in the sizes of the inner diameters of the intestines as well as blood vessels, this research has been unable to meet the requirements for medical applications. By applying the fluid dynamic equations, using the computational fluid dynamics method, to a robot axial length ranging from 10(-5) to 10(-2) m, the operational performance indicators (axial driving force, load torque, and maximum fluid pressure on the pipe wall) of the spiral capsule robot and the fluid turbulent intensity around the robot spiral surfaces was numerically calculated in a straight rigid pipe filled with fluid. The reasonableness and validity of the calculation method adopted in this study were verified by the consistency of the calculated values by the computational fluid dynamics method and the experimental values from a relevant literature. The results show that the greater the fluid turbulent intensity, the greater the impact of the fluid turbulence on the driving performance of the spiral capsule robot and the higher the energy consumption of the robot. For the same level of size of the robot, the axial driving force, the load torque, and the maximum fluid pressure on the pipe wall of the outer spiral robot were larger than those of the inner spiral robot. For different requirements of the operating environment, we can choose a certain kind of spiral capsule robot. This study provides a theoretical foundation for spiral capsule robots.

  11. Lubricin in human breast tissue expander capsules.

    Science.gov (United States)

    Cheriyan, Thomas; Guo, Lifei; Orgill, Dennis P; Padera, Robert F; Schmid, Thomas M; Spector, Myron

    2012-10-01

    Capsular contraction is the most common complication of breast reconstruction surgery. While presence of the contractile protein alpha smooth muscle actin (α-SMA) is considered among the causes of capsular contraction, the exact etiology and pathophysiology is not fully understood. The objective of this study was to investigate the possible role of lubricin in capsular formation and contraction by determining the presence and distribution of the lubricating protein lubricin in human breast tissue expander capsules. Related aims were to evaluate select histopathologic features of the capsules, and the percentage of cells expressing α-SMA, which reflects the myofibroblast phenotype. Capsules from tissue expanders were obtained from eight patients. Lubricin, at the tissue-implant interface, in the extracellular matrix, and in cells, and α-SMA-containing cells were evaluated immunohistochemically. The notable finding was that lubricin was identified in all tissue expander capsules: as a discrete layer at the tissue-implant interface, extracellular, and intracellular. There was a greater amount of lubricin in the extracellular matrix in the intimal-subintimal zone when compared with the tissue away from the implant. Varying degrees of synovial metaplasia were seen at the tissue-implant interface. α-SMA-containing cells were also seen in all but one patient. The findings might help us better understand factors involved in capsule formation.

  12. Unsteady Pressures on a Generic Capsule Shape

    Science.gov (United States)

    Burnside, Nathan; Ross, James C.

    2015-01-01

    While developing the aerodynamic database for the Orion spacecraft, the low-speed flight regime (transonic and below) proved to be the most difficult to predict and measure accurately. The flow over the capsule heat shield in descent flight was particularly troublesome for both computational and experimental efforts due to its unsteady nature and uncertainty about the boundary layer state. The data described here were acquired as part of a study to improve the understanding of the overall flow around a generic capsule. The unsteady pressure measurements acquired on a generic capsule shape are presented along with a discussion about the effects of various flight conditions and heat-shield surface roughness on the resulting pressure fluctuations.

  13. Intestinal preparation prior to capsule endoscopy administration

    Institute of Scientific and Technical Information of China (English)

    Vicente Pons Beltrán; Cristina Carretero; Bego(n)a Gonzalez-Suárez; I(n)aqui Fernández-Urien; Miguel Mu(n)oz Navas

    2008-01-01

    In order to have an adequate view of the whole small intestine during capsule endoscopy,the preparation recommended consists of a clear liquid diet and an overnight fast.However,visualization of the small bowel during video capsule endoscopy can be impaired by intestinal contents.To improve mucosal visualization,some authors have evaluated different regimens of preparation.There is no consensus about the necessity of intestinal preparation for capsule endoscopy and it should be interesting to develop adequate guidelines to improve its efficacy and tolerability.Moreover,the effect of preparation type (purgative) on intestinal transit time is not clear.Since a bowel preparation cannot definitively improve its visibility (and theoretically the yield of the test),it is not routinely recommended.

  14. Spectral measurements of asymmetrically irradiated capsule backlighters

    Science.gov (United States)

    Keiter, P. A.; Drake, R. P.

    2016-11-01

    Capsule backlighters provide a quasi-continuum x-ray spectrum over a wide range of photon energies [J. F. Hansen et al., Rev. Sci. Instrum. 79, 013504 (2008)]. Ideally one irradiates the capsule backlighter symmetrically, however, in complex experimental geometries, this is not always possible. In recent experiments we irradiated capsule backlighters asymmetrically and measured the x-ray spectrum from multiple directions. We will present time-integrated spectra over the photon energy range of 2-13 keV and time-resolved spectra over the photon energy range of 2-3 keV. We will compare the spectra from different lines of sight to determine if the laser asymmetry results in an angular dependence in the x-ray emission.

  15. Capsule endoscopy—A mechatronics perspective

    Science.gov (United States)

    Lin, Lin; Rasouli, Mahdi; Kencana, Andy Prima; Tan, Su Lim; Wong, Kai Juan; Ho, Khek Yu; Phee, Soo Jay

    2011-03-01

    The recent advances in integrated circuit technology, wireless communication, and sensor technology have opened the door for development of miniature medical devices that can be used for enhanced monitoring and treatment of medical conditions. Wireless capsule endoscopy is one of such medical devices that has gained significant attention during the past few years. It is envisaged that future wireless capsule endoscopies replace traditional endoscopy procedures by providing advanced functionalities such as active locomotion, body fluid/tissue sampling, and drug delivery. Development of energy-efficient miniaturized actuation mechanisms is a key step toward achieving this goal. Here, we review some of the actuators that could be integrated into future wireless capsules and discuss the existing challenges.

  16. Video capsule endoscopy in inflammatory bowel disease

    Science.gov (United States)

    Collins, Paul D

    2016-01-01

    Video capsule endoscopy (VCE) has evolved to become an important tool for the non-invasive examination of the small bowel, which hitherto had been relatively inaccessible to direct visualisation. VCE has been shown to play a role in monitoring the activity of small bowel Crohn’s disease and can be used to assess the response to anti-inflammatory treatment in Crohn’s disease. For those patients with Crohn’s disease who have undergone an intestinal resection, VCE has been assessed as a tool to detect post-operative recurrence. VCE may also aid in the reclassification of patients with a diagnosis of Inflammatory Bowel Disease Unclassified to Crohn’s disease. The evolution of colon capsule endoscopy (CCE) has expanded the application of this technology further. The use of CCE to assess the activity of ulcerative colitis has been described. This advance in capsule technology has also fuelled interest in its potential role as a minimally invasive tool to assess the whole of GI tract opening the possibility of its use for the panenteric assessment of Crohn’s disease. VCE is a safe procedure. However, the risk of a retained capsule is higher in patients with suspected or confirmed Crohn’s disease compared with patients having VCE examination for other indications. A retained video capsule is rare after successful passage of a patency capsule which may be utilised to pre-screen patients undergoing VCE. This paper describes the use of VCE in the assessment of inflammatory bowel disease. PMID:27499830

  17. Capsules with external navigation and triggered release.

    Science.gov (United States)

    Shchukin, Dmitry G; Shchukina, Elena

    2014-10-01

    Encapsulation is an important technology for pharmaceutical industry, food production, et cetera. Its current level of development requires capsule functionalization. One of the interesting ideas to provide new functionality to the microcapsule and nanocapsule is layer-by-layer deposition of functional species. This technique provides step-by-step adsorption of various species (polyelectrolytes, nanoparticles, proteins) when the layer growth is controlled by electrostatic, hydrogen bonding, hydrophobic forces and forming multilayer shells with nanometer precision. This review article introduces recent achievements of layer-by-layer technique attaining external navigation ability and release properties the capsule shell.

  18. Capsule endoscopy: Current status in obscure gastrointestinal bleeding

    Institute of Scientific and Technical Information of China (English)

    R Gupta; Nageshwar Duvvuru Reddy

    2007-01-01

    Capsule endoscopy (CE) is a safe, non invasive diagnostic modality for the evaluation of small bowel lesions. Obscure gastrointestinal bleeding (OGIB) is one of the most important indications of capsule endoscopy.Capsule endoscopy has a very high diagnostic yield especially if the bleeding is ongoing. This technique appears to be superior to other techniques for the detection of suspected lesions and the source of bleeding. Capsule endoscopy has been shown to change the outcome in patients with obscure gastrointestinal (GI)bleed.

  19. 21 CFR 872.3110 - Dental amalgam capsule.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Dental amalgam capsule. 872.3110 Section 872.3110...) MEDICAL DEVICES DENTAL DEVICES Prosthetic Devices § 872.3110 Dental amalgam capsule. (a) Identification. A dental amalgam capsule is a container device in which silver alloy is intended to be mixed with...

  20. Design of Endoscopic Capsule With Multiple Cameras.

    Science.gov (United States)

    Gu, Yingke; Xie, Xiang; Li, Guolin; Sun, Tianjia; Wang, Dan; Yin, Zheng; Zhang, Pengfei; Wang, Zhihua

    2015-08-01

    In order to reduce the miss rate of the wireless capsule endoscopy, in this paper, we propose a new system of the endoscopic capsule with multiple cameras. A master-slave architecture, including an efficient bus architecture and a four level clock management architecture, is applied for the Multiple Cameras Endoscopic Capsule (MCEC). For covering more area of the gastrointestinal tract wall with low power, multiple cameras with a smart image capture strategy, including movement sensitive control and camera selection, are used in the MCEC. To reduce the data transfer bandwidth and power consumption to prolong the MCEC's working life, a low complexity image compressor with PSNR 40.7 dB and compression rate 86% is implemented. A chipset is designed and implemented for the MCEC and a six cameras endoscopic capsule prototype is implemented by using the chipset. With the smart image capture strategy, the coverage rate of the MCEC prototype can achieve 98% and its power consumption is only about 7.1 mW.

  1. Electrohydrodynamic deformation of capsules in electric field

    Science.gov (United States)

    Das, Sudip; Thaokar, Rochish

    2016-11-01

    Micron size capsules are abundant in natural, technological and biological processes but they still require extensive investigation for better understanding of their mechanical behavior. A spherical capusle containing a Newtonian fluid bounded by a viscoelastic membrane and immersed in another Newtonian fluid, and subject to electric field is considered. Discontinuity of electrical properties such as conductivity and permittivity leads to a net Maxwell stress at the capsule interface. In response the capsule undergoes elastic deformation, leading to strain fields and elastic stresses that can balance the applied forces. We investigate this problem with fully resolved hydrodynamics in the Stokes flow limit and electrostatics using the capacitance model. Effect of AC, DC and pulsed DC fields is investigated. Our results show that membrane electrical properties have a huge impact on the equilibrium deformation as well as on the break up of capsules. Our results match with the literature results in the limit of high conductance of the membrane. Analytical theory is employed using spherical harmonics and numerical investigations are conducted using the Boundary integral method.

  2. Student Mobility. Information Capsule. Volume 0608

    Science.gov (United States)

    Blazer, Christie

    2007-01-01

    Mobility, rather than stability, has become the norm for students in schools across the United States. The student mobility rate is now higher in the United States than in any other industrialized country. This Information Capsule discusses the reasons for student mobility and the characteristics of highly mobile students and families. Research…

  3. Symptomatic Patency Capsule Retention in Suspected Crohn's Disease

    DEFF Research Database (Denmark)

    Rasmussen, Bjørn; Nathan, Torben; Jensen, Michael Dam

    2016-01-01

    The main limitation of capsule endoscopy is the risk of capsule retention. In patients with suspected Crohn's disease, however, this complication is rare, and if a small bowel stenosis is not reliably excluded, small bowel patency can be confirmed with the Pillcam patency capsule. We present two...... patients examined for suspected Crohn's disease who experienced significant symptoms from a retained patency capsule. Both patients had Crohn's disease located in the terminal ileum. In one patient, the patency capsule caused abdominal pain and vomiting and was visualized at magnetic resonance enterography...

  4. Basic ammonothermal GaN growth in molybdenum capsules

    Science.gov (United States)

    Pimputkar, S.; Speck, J. S.; Nakamura, S.

    2016-12-01

    Single crystal, bulk gallium nitride (GaN) crystals were grown using the basic ammonothermal method in a high purity growth environment created using a non-hermetically sealed molybdenum (Mo) capsule and compared to growths performed in a similarly designed silver (Ag) capsule and capsule-free René 41 autoclave. Secondary ion mass spectrometry (SIMS) analysis revealed transition metal free (<1×1017 cm-3) GaN crystals. Anomalously low oxygen concentrations ((2-6)×1018 cm-3) were measured in a {0001} seeded crystal boule grown using a Mo capsule, despite higher source material oxygen concentrations ((1-5)×1019 cm-3) suggesting that molybdenum (or molybdenum nitrides) may act to getter oxygen under certain conditions. Total system pressure profiles from growth runs in a Mo capsule system were comparable to those without a capsule, with pressures peaking within 2 days and slowly decaying due to hydrogen diffusional losses. Measured Mo capsule GaN growth rates were comparable to un-optimized growth rates in capsule-free systems and appreciably slower than in Ag-capsule systems. Crystal quality replicated that of the GaN seed crystals for all capsule conditions, with high quality growth occurring on the (0001) Ga-face. Optical absorption and impurity concentration characterization suggests reduced concentrations of hydrogenated gallium vacancies (VGa-Hx).

  5. Motion of an elastic capsule in a square microfluidic channel.

    Science.gov (United States)

    Kuriakose, S; Dimitrakopoulos, P

    2011-07-01

    In the present study we investigate computationally the steady-state motion of an elastic capsule along the centerline of a square microfluidic channel and compare it with that in a cylindrical tube. In particular, we consider a slightly over-inflated elastic capsule made of a strain-hardening membrane with comparable shearing and area-dilatation resistance. Under the conditions studied in this paper (i.e., small, moderate, and large capsules at low and moderate flow rates), the capsule motion in a square channel is similar to and thus governed by the same scaling laws with the capsule motion in a cylindrical tube, even though in the channel the cross section in the upstream portion of large capsules is nonaxisymmetric (i.e., square-like with rounded corners). When the hydrodynamic forces on the membrane increase, the capsule develops a pointed downstream edge and a flattened rear (possibly with a negative curvature) so that the restoring tension forces are increased as also happens with droplets. Membrane tensions increase significantly with the capsule size while the area near the downstream tip is the most probable to rupture when a capsule flows in a microchannel. Because the membrane tensions increase with the interfacial deformation, a suitable Landau-Levich-Derjaguin-Bretherton analysis reveals that the lubrication film thickness h for large capsules depends on both the capillary number Ca and the capsule size a; our computations determine the latter dependence to be (in dimensionless form) h ~ a(-2) for the large capsules studied in this work. For small and moderate capsule sizes a, the capsule velocity Ux and additional pressure drop ΔP+ are governed by the same scaling laws as for high-viscosity droplets. The velocity and additional pressure drop of large thick capsules also follow the dynamics of high-viscosity droplets, and are affected by the lubrication film thickness. The motion of our large thick capsules is characterized by a Ux-U ~ h ~ a(-2

  6. Capsule formation and asymbiotic seed germination in some hybrids of Phalaenopsis, influenced by pollination season and capsule maturity.

    Science.gov (United States)

    Balilashaki, Khosro; Gantait, Saikat; Naderi, Roohangiz; Vahedi, Maryam

    2015-07-01

    We explored the influence of pollination season and maturity of capsule on post-pollination capsule formation and in vitro asymbiotic seed germination, respectively. Three Phalaenopsis orchid hybrids, namely, 'Athens', 'Moscow' and 'Lusaka' flowers were artificially self-pollinated during winter, spring, summer and fall seasons and the impact of the pollination seasons was evident during capsule formation. It was observed that winter was the most suitable season for pollination of all the three Phalanaeopsis hybrids resulting in 80-88 % capsule formation. During summer, the pollination success rate was 24-28 %, but resulted in successful capsule formation. Season of pollination further delimited the germination efficiency of seeds harvested from capsules of variable maturity levels. Invariably, seeds collected from winter-pollinated capsules performed best in germination compared to other seasons, for instance, 'Moscow' seeds took less than 14 days to germinate from capsules developed following winter-pollination. Regarding the influence of capsule maturity on seed germination, we observed that seeds derived from 5-month mature capsules, invariably took least time to germinate than that of the 3-month or 7-month in all three hybrids, e.g., for 'Moscow' it was 13.9 days with a maximum of 90.3 % germination.

  7. Regional multiaxial mechanical properties of the porcine anterior lens capsule.

    Science.gov (United States)

    David, G; Pedrigi, R M; Heistand, M R; Humphrey, J D

    2007-02-01

    The lens capsule of the eye plays fundamental biomechanical roles in both normal physiological processes and clinical interventions. There has been modest attention given to the mechanical properties of this important membrane, however, and prior studies have focused on 1-D analyses of the data. We present results that suggest that the porcine anterior lens capsule has a complex, regionally dependent, nonlinear, anisotropic behavior. Specifically, using a subdomain inverse finite element method to analyze data collected via a new biplane video-based test system, we found that the lens capsule is nearly isotropic (in-plane) near the pole but progressively stiffer in the circumferential compared to the meridional direction as one approaches the equator. Because the porcine capsule is a good model of the young human capsule, there is strong motivation to determine if similar regional variations exist in the human lens capsule for knowledge of such complexities may allow us to improve the design of surgical procedures and implants.

  8. Role of shocks and mix caused by capsule defects

    Science.gov (United States)

    Bradley, P. A.; Cobble, J. A.; Tregillis, I. L.; Schmitt, M. J.; Obrey, K. D.; Glebov, V.; Batha, S. H.; Magelssen, G. R.; Fincke, J. R.; Hsu, S. C.; Krasheninnikova, N. S.; Murphy, T. J.; Wysocki, F. J.

    2012-09-01

    An Eulerian code with a turbulent mix model is used to model a set of plastic (CH) ablator capsules with and without equatorial grooves. The "perfect" capsule results were used to calibrate simulations of capsules with equatorial grooves of different depths that provided information on increasingly perturbed implosions. Simulations with a turbulence model were able to calculate the same yield over mix (YOM) ratio (experiment/mix simulation) of 0.2 to 0.3 for thin (8-μm thick) and thick shell (15-μm thick) capsules with no grooves and thin capsules with shallow grooves. When the capsules have deep grooves, the YOM ratio increases to greater than unity, probably because the deformed shocks focus too strongly on the symmetry axis in our two-dimensional simulations. This is supported by a comparison of simulated and experimental x-ray images.

  9. Expanding role of capsule endoscopy in inflammatory bowel disease

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Capsule endoscopy has been shown to detect small bowel inflammatory changes better than any other imaging modality. Selection criteria have been optimized to increase the yield of capsule endoscopy in patients suspected to have Crohn's disease. Capsule endoscopy allows for earlier diagnosis of Crohn's disease of the small bowel and improved diagnosis of colitis in patients where it is unclear if they suffer from Crohn's or ulcerative colitis. A test capsule is available to assess for small bowel strictures and thus avoid capsule retention. A common language has been developed and a new scoring index will be added to capsule software. It is envisioned that the manner in which we treat Crohn's disease in the future will change, based on earlier diagnosis and treatment aimed at mucosal healing rather than symptom improvement.

  10. Analysis Of Wetted-Foam ICF Capsule Perormance

    Science.gov (United States)

    Peterson, R.; Olson, R.; Zylstra, A.; Haines, B.; Yi, A.; Bradley, P.; Yin, L.; Leeper, R.; Kline, J.

    2016-10-01

    The performance of wetted-foam ICF capsules is investigated with the RAGE Eulerian radiation-hydrodynamics computer code. We are developing an experimental platform on NIF that employs a wetted foam liquid DT fuel layer ICF capsules. By varying the capsule temperature, the vapor density in the capsule can be prescribed, and the hot spot convergence ratio (CR) of the capsule implosion can be controlled. This allows us to investigate the fidelity of RAGE in modeling of capsule implosions as the value of CR is varied. In the NIF experiments, CR can be varied from 12 to 25. This presentation will cover simulations with RAGE of three NIF shots performed in 2016; a DD and a DT liquid fuel shot with CR =14 and a DT shot with CR =16. It will also discuss analysis of future experiments. This work was performed under auspices of the U. S. DOE by LANL.

  11. Capsule development and utilization for material irradiation tests

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Young Hwan; Kim, B. G.; Joo, K. N. [and others

    2000-05-01

    The development program of advanced nuclear structural and fuel materials includes the in-pile tests using the instrumented capsule at HANARO. The tests were performed in the in-core test holes of CT, IR 1 and 2 and OR 4 and 5 of HANARO. Extensive efforts have also been made to establish design and manufacturing technology for the instrumented capsule and its related system, which should be compatible with the HANARO's characteristics. Since the first instrumented capsule(97M-01K) had been designed and successfully fabricated, five tests were done to support the users and provided the economic benefits to user by generating the essential in-pile information on the performance and structural integrity of materials. This paper describes the present status and future plans of these R and D activities for the development of the instrumented capsule including in-situ material property measurement capsules and nuclear fuel test capsules.

  12. Polar tent for reduced perturbation of NIF ignition capsules

    Science.gov (United States)

    Hammel, B. A.; Pickworth, L.; Stadermann, M.; Field, J.; Robey, H.; Scott, H. A.; Smalyuk, V.

    2016-10-01

    In simulations, a tent that contacts the capsule near the poles and departs tangential to the capsule surface greatly reduces the capsule perturbation, and the resulting mass injected into the hot-spot, compared to current capsule support methods. Target fabrication appears feasible with a layered tent (43-nm polyimide + 8-nm C) for increased stiffness. We are planning quantitative measurements of the resulting shell- ρR perturbation near peak implosion velocity (PV) using enhanced self-emission backlighting, achieved by adding 1% Ar to the capsule fill in Symcaps (4He + H). Layered DT implosions are also planned for an integrated test of capsule performance. We will describe the design and simulation predictions. Prepared by LLNL under Contract DE-AC52-07NA27344.

  13. Small intestinal model for electrically propelled capsule endoscopy

    Directory of Open Access Journals (Sweden)

    Woo Sang Hyo

    2011-12-01

    Full Text Available Abstract The aim of this research is to propose a small intestine model for electrically propelled capsule endoscopy. The electrical stimulus can cause contraction of the small intestine and propel the capsule along the lumen. The proposed model considered the drag and friction from the small intestine using a thin walled model and Stokes' drag equation. Further, contraction force from the small intestine was modeled by using regression analysis. From the proposed model, the acceleration and velocity of various exterior shapes of capsule were calculated, and two exterior shapes of capsules were proposed based on the internal volume of the capsules. The proposed capsules were fabricated and animal experiments were conducted. One of the proposed capsules showed an average (SD velocity in forward direction of 2.91 ± 0.99 mm/s and 2.23 ± 0.78 mm/s in the backward direction, which was 5.2 times faster than that obtained in previous research. The proposed model can predict locomotion of the capsule based on various exterior shapes of the capsule.

  14. New reduced volume preparation regimen in colon capsule endoscopy

    Institute of Scientific and Technical Information of China (English)

    Yasuo Kakugawa; Kazuhide Higuchi; Shinji Tanaka; Hideki Ishikawa; Hisao Tajiri; Yutaka Saito; Shoichi Saito; Kenji Watanabe; Naoki Ohmiya; Mitsuyuki Murano; Shiro Oka; Tetsuo Arakawa; Hidemi Goto

    2012-01-01

    AIM:To evaluate the effectiveness of our proposed bowel preparation method for colon capsule endoscopy.METHODS:A pilot,multicenter,randomized controlled trial compared our proposed "reduced volume method" (group A) with the "conventional volume method" (group B) preparation regimens.Group A did not drink polyethylene glycol electrolyte lavage solution (PEGELS) the day before the capsule procedure,while group B drank 2 L.During the procedure day,groups A and B drank 2 L and 1 L of PEG-ELS,respectively,and swallowed the colon capsule (PillCam COLON(R) capsule).Two hours later the first booster of 100 g magnesium citrate mixed with 900 mL water was administered to both groups,and the second booster was administered six hours post capsule ingestion as long as the capsule had not been excreted by that time.Capsule videos were reviewed for grading of cleansing level.RESULTS:Sixty-four subjects were enrolled,with results from 60 analyzed.Groups A and B included 31 and 29 subjects,respectively.Twenty-nine (94%) subjects in group A and 25 (86%) subjects in group B had adequate bowel preparation (ns).Twenty-two (71%) of the 31 subjects in group A excreted the capsule within its battery life compared to 16 (55%) of the 29 subjects in group B (ns).Of the remaining 22 subjects whose capsules were not excreted within the battery life,all of the capsules reached the left side colon before they stopped functioning.A single adverse event was reported in one subject who had mild symptoms of nausea and vomiting one hour after starting to drink PEG-ELS,due to ingesting the PEG-ELS faster than recommended.CONCLUSION:Our proposed reduced volume bowel preparation method for colon capsule without PEG-ELS during the days before the procedure was as effective as the conventional volume method.

  15. 21 CFR 876.1300 - Ingestible telemetric gastrointestinal capsule imaging system.

    Science.gov (United States)

    2010-04-01

    ... § 876.1300 Ingestible telemetric gastrointestinal capsule imaging system. (a) Identification. An ingestible telemetric gastrointestinal capsule imaging system is used for visualization of the small bowel... Special Controls Guidance Document: Ingestible Telemetric Gastrointestinal Capsule Imaging Systems;...

  16. Orbital Thermal Control of the Mercury Capsule

    Science.gov (United States)

    Weston, Kenneth C.

    1960-01-01

    The approach to orbital thermal control of the Project Mercury capsule environment is relatively unsophisticated compared with that for many unmanned satellites. This is made possible by the relatively short orbital flight of about 4 1/2 hours and by the presence of the astronaut who is able to monitor the capsule systems and compensate for undesirable thermal conditions. The general external features of the Mercury configuration as it appears in the orbital phase of flight are shown. The conical afterbody is a double-wall structure. The inner wall serves as a pressure vessel for the manned compartment, and the outer wall, of shingle type construction, acts as a radiating shield during reentry. Surface treatment of the shingles calls for a stably oxidized surface to minimize reentry temperatures. The shingles are supported by insulated stringers attached to the inner skin. Areas between stringers are insulated by blankets of Thermoflex insulation. This insulation is especially effective at high altitude due to the reduction of its thermal conductivity with decreasing pressure. As a result of the design of the afterbody for the severe reentry conditions, the heat balance on the manned compartment indicates the necessity for moderate internal cooling to compensate for the heat generation due to human and electrical sources. This cooling is achieved by the controlled vaporization of water in the cabin and astronaut-suit heat exchangers.

  17. Isotretinoin Oil-Based Capsule Formulation Optimization

    Directory of Open Access Journals (Sweden)

    Pi-Ju Tsai

    2013-01-01

    Full Text Available The purpose of this study was to develop and optimize an isotretinoin oil-based capsule with specific dissolution pattern. A three-factor-constrained mixture design was used to prepare the systemic model formulations. The independent factors were the components of oil-based capsule including beeswax (X1, hydrogenated coconut oil (X2, and soybean oil (X3. The drug release percentages at 10, 30, 60, and 90 min were selected as responses. The effect of formulation factors including that on responses was inspected by using response surface methodology (RSM. Multiple-response optimization was performed to search for the appropriate formulation with specific release pattern. It was found that the interaction effect of these formulation factors (X1X2, X1X3, and X2X3 showed more potential influence than that of the main factors (X1, X2, and X3. An optimal predicted formulation with Y10 min, Y30 min, Y60 min, and Y90 min release values of 12.3%, 36.7%, 73.6%, and 92.7% at X1, X2, and X3 of 5.75, 15.37, and 78.88, respectively, was developed. The new formulation was prepared and performed by the dissolution test. The similarity factor f2 was 54.8, indicating that the dissolution pattern of the new optimized formulation showed equivalence to the predicted profile.

  18. Potential value of Cs-137 capsules

    Energy Technology Data Exchange (ETDEWEB)

    Bloomster, C.H.; Brown, D.R.; Bruno, G.A.; Hazelton, R.F.; Hendrickson, P.L.; Lezberg, A.J.; Tingey, G.L.; Wilfert, G.L.

    1985-04-01

    We determined the value of Cs-137 compared to Co-60 as a source for the irradiation of fruit (apples and cherries), pork and medical supplies. Cs-137, in the WESF capsule form, had a value of approximately $0.40/Ci as a substitute for Co-60 priced at approximately $1.00/Ci. The comparison was based on the available curies emitted from the surface of each capsule. We developed preliminary designs for fourteen irradiation facilities; seven were based on Co-60 and seven were based on Cs-137. These designs provided the basis for estimating capital and operating costs which, in turn, provided the basis for determining the value of Cs-137 relative to Co-60 in these applications. We evaluated the effect of the size of the irradiation facility on the value of Cs-137. The cost of irradiation is low compared to the value of the product. Irradiation of apples for disinfestation costs $.01 to .02 per pound. Irradiation for trichina-safe pork costs $.02 per pound. Irradiation of medical supplies for sterilization costs $.07 to .12 per pound. The cost of the irradiation source, either Co-60 or Cs-137, contributed only a minor amount to the total cost of irradiation, about 5% for the fruit and hog cases and about 20% for the medical supply cases. We analyzed the sensitivity of the irradiation costs and Cs-137 value to several key assumptions.

  19. Potassium iodide capsule treatment of feline sporotrichosis.

    Science.gov (United States)

    Reis, Erica G; Gremião, Isabella D F; Kitada, Amanda A B; Rocha, Raphael F D B; Castro, Verônica S P; Barros, Mônica B L; Menezes, Rodrigo C; Pereira, Sandro A; Schubach, Tânia M P

    2012-06-01

    Sporotrichosis is a mycosis caused by Sporothrix schenckii. The most affected animal is the cat; it has played an important role in the zoonotic transmission of this disease, especially in Rio de Janeiro, Brazil, since 1998. In order to evaluate the treatment of feline sporotrichosis with potassium iodide, an observational cohort was conducted in 48 cats with sporotrichosis at Instituto de Pesquisa Clínica Evandro Chagas, Fiocruz. All cats received potassium iodide capsules, 2.5 mg/kg to 20 mg/kg q24h. The cure rate was 47.9%, treatment failure was 37.5%, treatment abandonment was 10.4% and death was 4.2%. Clinical adverse effects were observed in 52.1% of the cases. Thirteen cats had a mild increase in hepatic transaminase levels during the treatment, six of them presented clinical signs suggestive of hepatotoxicity. Compared to previous studies with itraconazole and iodide in saturated solution, potassium iodide capsules are an alternative for feline sporotrichosis treatment.

  20. Experimental measurement on movement of spiral-type capsule endoscope

    Directory of Open Access Journals (Sweden)

    Yang W

    2016-01-01

    Full Text Available Wanan Yang,1 Houde Dai,2 Yong He,1 Fengqing Qin1 1School of Computer and Information Engineering, Yibin University, Yibin, Sichuan, People's Republic of China; 2Quanzhou Institute of Equipment Manufacturing, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Quanzhou, People's Republic of China Abstract: Wireless capsule endoscope achieved great success, however, the maneuvering of wireless capsule endoscope is challenging at present. A magnetic driving instrument, including two bar magnets, a stepper motor, a motor driver, a motor controller, and a power supplier, was developed to generate rotational magnetic fields. Permanent magnet ring, magnetized as S and N poles radially and mounted spiral structure on the surface, acted as a capsule. The maximum torque passing to the capsule, rotational synchronization of capsule and motor, and the translational speed of capsule, were measured in ex vivo porcine large intestine. The experimental results illustrate that the rotational movement of the spiral-type capsule in the intestine is feasible and the cost of the magnetic driving equipment is low. As a result, the solution is promising in the future controllability. Keywords: wireless capsule endoscope, magnet ring, magnetic driving, spiral structure, torque  

  1. Risk factors for incomplete small-bowel capsule endoscopy

    NARCIS (Netherlands)

    Westerhof, Jessie; Weersma, Rinse K.; Koornstra, Jan J.

    2009-01-01

    Background: In 20% to 30% of capsule endoscopy (CE) procedures, the capsule does not reach the cecum within recording time, with incomplete imaging of the small bowel, which limits the value of CE. Objective: To identify possible risk factors for incomplete small-bowel CE examinations. Design: Data

  2. Experimental modulation of capsule size in Cryptococcus neoformans

    Directory of Open Access Journals (Sweden)

    Zaragoza Oscar

    2004-01-01

    Full Text Available Experimental modulation of capsule size is an important technique for the study of the virulence of the encapsulated pathogen Cryptococcus neoformans. In this paper, we summarize the techniques available for experimental modulation of capsule size in this yeast and describe improved methods to induce capsule size changes. The response of the yeast to the various stimuli is highly dependent on the cryptococcal strain. A high CO2 atmosphere and a low iron concentration have been used classically to increase capsule size. Unfortunately, these stimuli are not reliable for inducing capsular enlargement in all strains. Recently we have identified new and simpler conditions for inducing capsule enlargement that consistently elicited this effect. Specifically, we noted that mammalian serum or diluted Sabouraud broth in MOPS buffer pH 7.3 efficiently induced capsule growth. Media that slowed the growth rate of the yeast correlated with an increase in capsule size. Finally, we summarize the most commonly used media that induce capsule growth in C. neoformans.

  3. Quality evaluation of simvastatin compounded capsules

    Directory of Open Access Journals (Sweden)

    Flávia Dias Marques-Marinho

    2011-09-01

    Full Text Available Simvastatin is commercially available as tablets and compounded capsules in Brazil. Very few reports regarding these capsules' quality, and consequently their efficacy, are available. The pharmaceutical quality of 30 batches of 20 mg simvastatin capsules from the market was evaluated by weight determination, content uniformity, disintegration (Brazilian Pharmacopeia, assay and dissolution test (USP32 tablet monograph. A HPLC method was developed for assay, content uniformity and dissolution test, and specifications were also established. Out of the 30 batches evaluated, 29 showed capsule disintegration within 45 min and individual weight variation was within ±10% or ±7.5% relative to average weight, for 300 mg, respectively. Only 27 batches met dissolution test criteria with values >80% of the labeled amount in 45 min; 21 batches showed simvastatin content between 90.0-110.0% of the labeled amount and 19 batches had at least 9 out of 10 capsules with content uniformity values between 85.0-115.0% of the labeled amount with RSDNo Brasil, a sinvastatina está comercialmente disponível na forma de comprimidos e cápsulas manipuladas. Poucos relatos estão disponíveis sobre a qualidade e, consequentemente, a eficácia dessas cápsulas. A qualidade de 30 lotes de sinvastatina 20 mg cápsulas do mercado foi avaliada através da determinação de peso, uniformidade de conteúdo, desintegração (Farmacopéia Brasileira, doseamento e teste de dissolução (monografia comprimidos USP32. Método por CLAE foi desenvolvido para o doseamento, uniformidade de conteúdo e teste de dissolução; além disso, especificações foram estabelecidas. Dos 30 lotes avaliados, 29 apresentaram desintegração da cápsula até 45 min e a variação do peso individual foi ± 10% ou ± 7,5% em relação ao peso médio, se 300 mg, respectivamente. Apenas 27 lotes preencheram os critérios do teste de dissolução com valores > 80% da quantidade rotulada, em 45 min, 21

  4. Analysis of Fission Products on the AGR-1 Capsule Components

    Energy Technology Data Exchange (ETDEWEB)

    Paul A. Demkowicz; Jason M. Harp; Philip L. Winston; Scott A. Ploger

    2013-03-01

    The components of the AGR-1 irradiation capsules were analyzed to determine the retained inventory of fission products in order to determine the extent of in-pile fission product release from the fuel compacts. This includes analysis of (i) the metal capsule components, (ii) the graphite fuel holders, (iii) the graphite spacers, and (iv) the gas exit lines. The fission products most prevalent in the components were Ag-110m, Cs 134, Cs 137, Eu-154, and Sr 90, and the most common location was the metal capsule components and the graphite fuel holders. Gamma scanning of the graphite fuel holders was also performed to determine spatial distribution of Ag-110m and radiocesium. Silver was released from the fuel components in significant fractions. The total Ag-110m inventory found in the capsules ranged from 1.2×10 2 (Capsule 3) to 3.8×10 1 (Capsule 6). Ag-110m was not distributed evenly in the graphite fuel holders, but tended to concentrate at the axial ends of the graphite holders in Capsules 1 and 6 (located at the top and bottom of the test train) and near the axial center in Capsules 2, 3, and 5 (in the center of the test train). The Ag-110m further tended to be concentrated around fuel stacks 1 and 3, the two stacks facing the ATR reactor core and location of higher burnup, neutron fluence, and temperatures compared with Stack 2. Detailed correlation of silver release with fuel type and irradiation temperatures is problematic at the capsule level due to the large range of temperatures experienced by individual fuel compacts in each capsule. A comprehensive Ag 110m mass balance for the capsules was performed using measured inventories of individual compacts and the inventory on the capsule components. For most capsules, the mass balance was within 11% of the predicted inventory. The Ag-110m release from individual compacts often exhibited a very large range within a particular capsule.

  5. Analysing intracellular deformation of polymer capsules using structured illumination microscopy

    Science.gov (United States)

    Chen, Xi; Cui, Jiwei; Sun, Huanli; Müllner, Markus; Yan, Yan; Noi, Ka Fung; Ping, Yuan; Caruso, Frank

    2016-06-01

    Understanding the behaviour of therapeutic carriers is important in elucidating their mechanism of action and how they are processed inside cells. Herein we examine the intracellular deformation of layer-by-layer assembled polymer capsules using super-resolution structured illumination microscopy (SIM). Spherical- and cylindrical-shaped capsules were studied in three different cell lines, namely HeLa (human epithelial cell line), RAW264.7 (mouse macrophage cell line) and differentiated THP-1 (human monocyte-derived macrophage cell line). We observed that the deformation of capsules was dependent on cell line, but independent of capsule shape. This suggests that the mechanical forces, which induce capsule deformation during cell uptake, vary between cell lines, indicating that the capsules are exposed to higher mechanical forces in HeLa cells, followed by RAW264.7 and then differentiated THP-1 cells. Our study demonstrates the use of super-resolution SIM in analysing intracellular capsule deformation, offering important insights into the cellular processing of drug carriers in cells and providing fundamental knowledge of intracellular mechanobiology. Furthermore, this study may aid in the design of novel drug carriers that are sensitive to deformation for enhanced drug release properties.Understanding the behaviour of therapeutic carriers is important in elucidating their mechanism of action and how they are processed inside cells. Herein we examine the intracellular deformation of layer-by-layer assembled polymer capsules using super-resolution structured illumination microscopy (SIM). Spherical- and cylindrical-shaped capsules were studied in three different cell lines, namely HeLa (human epithelial cell line), RAW264.7 (mouse macrophage cell line) and differentiated THP-1 (human monocyte-derived macrophage cell line). We observed that the deformation of capsules was dependent on cell line, but independent of capsule shape. This suggests that the mechanical forces

  6. RAMA Surveillance Capsule and Component Activation Analyses

    Energy Technology Data Exchange (ETDEWEB)

    Watkins, Kenneth E.; Jones, Eric N. [TransWare Enterprises Inc., 1565 Mediterranean Dr., Sycamore, IL 60178 (United States); Carter, Robert G. [Electric Power Research Institute, 1300 West W. T. Harris Blvd., Charlotte, NC 28262 (United States)

    2011-07-01

    This paper presents the calculated-to-measured ratios associated with the application of the RAMA Fluence Methodology software to light water reactor surveillance capsule and reactor component activation evaluations. Comparisons to measurements are performed for pressurized water reactor and boiling water reactor surveillance capsule activity specimens from seventeen operating light water reactors. Comparisons to measurements are also performed for samples removed from the core shroud, top guide, and jet pump brace pads from two reactors. In conclusion: The flexible geometry modeling capabilities provided by RAMA, combined with the detailed representation of operating reactor history and anisotropic scattering detail, produces accurate predictions of the fast neutron fluence and neutron activation for BWR and PWR surveillance capsule geometries. This allows best estimate RPV fluence to be determined without the need for multiplicative bias corrections. The three-dimensional modeling capability in RAMA provides an accurate estimate of the fast neutron fluence for regions far removed from the core mid-plane elevation. The comparisons to activation measurements for various core components indicate that the RAMA predictions are reasonable, and notably conservative (i.e., C/M ratios are consistently greater than unity). It should be noted that in the current evaluations, the top and bottom fuel regions are represented by six inch height nodes. As a result, the leakage-induced decrease in power near the upper and lower edges of the core are not well represented in the current models. More precise predictions of fluence for components that lie above and below the core boundaries could be obtained if the upper and lower fuel nodes were subdivided into multiple axial regions with assigned powers that reflect the neutron leakage at the top and bottom of the core. This use of additional axial sub-meshing at the top and bottom of the core is analogous to the use of pin

  7. A comparative study on liquid core formulation on the diameter on the alginate capsules

    Science.gov (United States)

    Ong, Hui-Yen; Lee, Boon-Beng; Radzi, AkmalHadi Ma'; Zakaria, Zarina; Chan, Eng-Seng

    2015-08-01

    Liquid core capsule has vast application in biotechnology related industries such as pharmaceutical, medical, agriculture and food. Formulation of different types of capsule was important to determine the performance of the capsule. Generally, the liquid core capsule with different formulations generated different size of capsule.Therefore, the aim of this project is to investigate the effect of different liquid core solution formulations on the diameter of capsule. The capsule produced by extruding liquid core solutions into sodium alginate solution. Three types of liquid core solutions (chitosan, xanthan gum, polyethylene glycol (PEG)) were investigated. The results showed that there is significant change in capsule diameter despite in different types of liquid core solution were used and a series of capsule range in diameter of 3.1 mm to 4.5 mm were produced. Alginate capsule with chitosan formulation appeared to be the largest capsule among all.

  8. Optimal Bowel Preparation for Video Capsule Endoscopy

    Directory of Open Access Journals (Sweden)

    Hyun Joo Song

    2016-01-01

    Full Text Available During video capsule endoscopy (VCE, several factors, such as air bubbles, food material in the small bowel, and delayed gastric and small bowel transit time, influence diagnostic yield, small bowel visualization quality, and cecal completion rate. Therefore, bowel preparation before VCE is as essential as bowel preparation before colonoscopy. To date, there have been many comparative studies, consensus, and guidelines regarding different kinds of bowel cleansing agents in bowel preparation for small bowel VCE. Presently, polyethylene glycol- (PEG- based regimens are given primary recommendation. Sodium picosulphate-based regimens are secondarily recommended, as their cleansing efficacy is less than that of PEG-based regimens. Sodium phosphate as well as complementary simethicone and prokinetics use are considered. In this paper, we reviewed previous studies regarding bowel preparation for small bowel VCE and suggested optimal bowel preparation of VCE.

  9. In vitro study on sustained release capsule formulation of acetazolamide.

    Science.gov (United States)

    Pandey, V P; Kannan, K; Manavalan, R; Desai, N

    2003-10-01

    In the present study formulation of sustained release capsule of acetazolamide 250 mg was tried using nonpareil seeds. Nonpareil seeds were coated with drug, polyvinylpyrrolidone, glyceryl monostearate, microcrystalline wax, and glyceryl distearate either individually or in combination to achieve sustained release capsule 250 mg. In successful formulation 20% drug coated pellets and 80% wax coated pellets were taken. Wax coated pellets for successful formulation contained coating of microcrystalline wax and glyceryl distearate on drug coated pellets of the same concentration of 1.6% w/w. Successful formulated sustained release capsule 250 mg of acetazolamide was compared in in vitro study with theoretical sustained release formulation suggested by wagner and one marketed sustained release capsule 250 mg. Formulated capsule showed result superior to or on par with marketed capsule. For successful formulation pellets were filled in '1' size hard gelatin capsule and stability study was carried out in hot air over at room temperature and 45 degrees C for 5 weeks. The formulation was found stable in respect of drug content and release rate.

  10. Patency(C) and agile(C) capsules

    Institute of Scientific and Technical Information of China (English)

    àngel Caunedo-àlvarez; Javier Romero-Vazquez; Juan M Herrerias-Gutierrez

    2008-01-01

    Small bowel strictures can be missed by current diagnostic methods.The Patency capsule is a new non-endoscopic dissolvable capsule which has as an objective of checking the patency of digestive tract,in a non-invasive manner.The available clinical trials have demonstrated that the Patency(C) capsule is a good tool for assessment of the functional patency of the small bowel,and it allows identification of those patients who can safely undergo a capsule endoscopy,despite clinical and radiographic evidence of small-bowel obstruction.Some cases of intestinal occlusion have been reported with the Patency(C) capsule,four of them needed surgery.So,a new capsule with two timer plugs (Agile(C) capsule) has been recently developed in order to minimize the risk of occlusion.This new device stars its dissolution process earlier (30 h after ingestion) and its two timer plugs have been designed to begin the disintegration even when the device is blocked in a tight stricture.

  11. Solid State Stability of Extemporaneously Prepared Levothyroxine Aliquots and Capsules.

    Science.gov (United States)

    Fortner, Jeff; Salton, Jason; Carlson, Christie; Wheeler, Rich; Cote, Brianna; Rao, Deepa

    2015-01-01

    The purpose of this research was to collect, analyze, and compare stability data for levothyroxine (T4) powder in the anhydrous and pentahydrate form when prepared as an aliquot and in capsules. Two different compounding pharmacies, Central Iowa Compounding and Gateway Medical Pharmacy, used different forms of T4 and aliquot formulations, which were studied to determine the beyond-use date at ±5% or ±10% of labeled strength. T4 was extracted from aliquot and capsule formulations and assessed using reverse-phase high- performance liquid chromatography validated to differentiate between the degraded and original forms of T4. The results indicate that T4 1:100 aliquot formulation prepared with silica gel or Avicel as filler are stable for 120 days at ±10% labeled potency, but at ±5% labeled potency, the silica gel and Avicel aliquot formulations are stable for 45 and 30 days, respectively. The silica gel capsules prepared from fresh aliquot were stable for 120 days at ±10% labeled potency and 90 days at ±5% labeled potency, while the Avicel capsules prepared from fresh aliquot were stable for 180 days at both ±10% and ±5% labeled potency. Avicel capsules prepared from old aliquot (120 days) and fresh aliquot (1 day) were also compared for stability. The old aliquot Avicel capsules were stable for 14 days at ±5% labeled potency and 150 days at ±10% labeled potency, while new aliquot Avicel capsules were stable for 180 days at both ±10% and ±5% labeled potency. Based on our data, there can be significant variation in the beyond-use dates assigned to T4 capsules based on the diluents used for aliquots, the final capsule formulations, and the potency standards applied. These results also indicate that pharmacists must exercise caution when using older aliquots and may have to assign shorter beyond-use dates.

  12. Researches on Magnetic Localization for Detecting Capsule in Gastrointestinal Tract

    Institute of Scientific and Technical Information of China (English)

    HE Wen-hui; YAN Guo-zheng; GUO Xu-dong; WANG Kun-dong

    2007-01-01

    Recently, the capsule detection for examination of gastrointestinal (GI) tract became a novel noninvasive system, but it was still a problem for capsule's location.This paper examined various technologies used for measuring position based on magnetic method of the capsule in GI tract, while some new methods were investigated and their efficiency and complexity were analyzed.The results show that the radio frequency location is only practicable, but the tri-coil stimulating magnetic method and magnetic marker method can help to acquire a high precise, simplified, efficient and localized device.

  13. Characterisation of two AGATA asymmetric high purity germanium capsules

    Energy Technology Data Exchange (ETDEWEB)

    Colosimo, S.J., E-mail: sjc@ns.ph.liv.ac.uk [Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom); Moon, S.; Boston, A.J.; Boston, H.C.; Cresswell, J.R.; Harkness-Brennan, L.; Judson, D.S. [Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom); Lazarus, I.H. [STFC Daresbury, Daresbury, Warrington WA4 4AD (United Kingdom); Nolan, P.J. [Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom); Simpson, J. [STFC Daresbury, Daresbury, Warrington WA4 4AD (United Kingdom); Unsworth, C. [Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)

    2015-02-11

    The AGATA spectrometer is an array of highly segmented high purity germanium detectors. The spectrometer uses pulse shape analysis in order to track Compton scattered γ-rays to increase the efficiency of nuclear spectroscopy studies. The characterisation of two high purity germanium detector capsules for AGATA of the same A-type has been performed at the University of Liverpool. This work will examine the uniformity of performance of the two capsules, including a comparison of the resolution and efficiency as well as a study of charge collection. The performance of the capsules shows good agreement, which is essential for the efficient operation of the γ-ray tracking array.

  14. Design and synthesis of organic-inorganic hybrid capsules for biotechnological applications.

    Science.gov (United States)

    Shi, Jiafu; Jiang, Yanjun; Wang, Xiaoli; Wu, Hong; Yang, Dong; Pan, Fusheng; Su, Yanlei; Jiang, Zhongyi

    2014-08-07

    Organic-inorganic hybrid capsules, which typically possess a hollow lumen and a hybrid wall, have emerged as a novel and promising class of hybrid materials and have attracted enormous attention. In comparison to polymeric capsules or inorganic capsules, the hybrid capsules combine the intrinsic physical/chemical properties of the organic and inorganic moieties, acquire more degrees of freedom to manipulate multiple interactions, create hierarchical structures and integrate multiple functionalities. Thus, the hybrid capsules exhibit superior mechanical strength (vs. polymeric capsules) and diverse functionalities (vs. inorganic capsules), which may give new opportunities to produce high-performance materials. Much effort has been devoted to exploring innovative and effective methods for the synthesis of hybrid capsules that exhibit desirable performance in target applications. This tutorial review firstly presents a brief description of the capsular structure and hybrid materials in nature, then classifies the hybrid capsules into molecule-hybrid capsules and nano-hybrid capsules based upon the size of the organic and inorganic moieties in the capsule wall, followed by a detailed discussion of the design and synthesis of the hybrid capsules. For each kind of hybrid capsule, the state-of-the-art synthesis methods are described in detail and a critical comment is embedded. The applications of these hybrid capsules in biotechnological areas (biocatalysis, drug delivery, etc.) have also been summarized. Hopefully, this review will offer a perspective and guidelines for the future research and development of hybrid capsules.

  15. Multiaxial mechanical behavior of the porcine anterior lens capsule.

    Science.gov (United States)

    Heistand, M R; Pedrigi, R M; Delange, S L; Dziezyc, J; Humphrey, J D

    2005-11-01

    The biomechanics of the lens capsule of the eye is important both in physiologic processes such as accommodation and clinical treatments such as cataract surgery. Although the lens capsule experiences multiaxial stresses in vivo, there have been no measurements of its multiaxial properties or possible regional heterogeneities. Rather all prior mechanical data have come from 1-D pressure-volume or uniaxial force-length tests. Here, we report a new experimental approach to study in situ the regional, multiaxial mechanical behavior of the lens capsule. Moreover, we report multiaxial data suggesting that the porcine anterior lens capsule exhibits a typical nonlinear pseudo-elastic behavior over finite strains, that the in situ state is pre-stressed multi-axially, and that the meridional and circumferential directions are principal directions of strain, which is nearly equi-biaxial at the pole but less so towards the equator. Such data are fundamental to much needed constitutive formulations.

  16. Capsule endoscopy of the future: What's on the horizon?

    Science.gov (United States)

    Slawinski, Piotr R; Obstein, Keith L; Valdastri, Pietro

    2015-10-01

    Capsule endoscopes have evolved from passively moving diagnostic devices to actively moving systems with potential therapeutic capability. In this review, we will discuss the state of the art, define the current shortcomings of capsule endoscopy, and address research areas that aim to overcome said shortcomings. Developments in capsule mobility schemes are emphasized in this text, with magnetic actuation being the most promising endeavor. Research groups are working to integrate sensor data and fuse it with robotic control to outperform today's standard invasive procedures, but in a less intrusive manner. With recent advances in areas such as mobility, drug delivery, and therapeutics, we foresee a translation of interventional capsule technology from the bench-top to the clinical setting within the next 10 years.

  17. [Acute caffeine intoxication after intake of 'herbal energy capsules'

    NARCIS (Netherlands)

    Kromhout, H.E.; Landstra, A.M.; Luin, M. van; Setten, P.A. van

    2008-01-01

    Two males, 15 and 17 years old respectively, presented at the Emergency Department complaining of cramping abdominal pain, nausea and vomiting after ingestion of energy capsules. Physical examination revealed sinus tachycardia and slight abdominal pain. Laboratory examination showed substantial hypo

  18. The mechanical properties of the human hip capsule ligaments.

    Science.gov (United States)

    Hewitt, John D; Glisson, Richard R; Guilak, Farshid; Vail, T Parker

    2002-01-01

    The human hip capsule is adapted to facilitate upright posture, joint stability, and ambulation, yet it routinely is excised in hip surgery without a full understanding of its mechanical contributions. The objective of this study was to provide information about the mechanical properties of the ligaments that form the hip capsule. Cadaver bone-ligament-bone specimens of the iliofemoral, ischiofemoral, and femoral arcuate ligaments were tested to failure in tension. The hip capsule was found to be an inhomogeneous structure and should be recognized as being composed of discrete constituent ligaments. The anterior ligaments, consisting of the 2 arms of the iliofemoral ligament, were much stronger than the posterior ischiofemoral ligament, withstanding greater force at failure and exhibiting greater stiffness. Knowledge of the anatomy and mechanical properties of the capsule may help the hip surgeon choose an appropriate surgical approach or repair strategy.

  19. Wireless capsule video endoscopy:Three years of experience

    Institute of Scientific and Technical Information of China (English)

    Rami Eliakim

    2004-01-01

    AIM: To review and summerize the current literatue regarding M2A wireless capsule endoscopy.METHODS: Peer reviewed publications regarding the use of capsule endoscopy as well as our personal experience were reviewed.RESULTS: Review of the literature dearly showed that capsule endoscopy was superior to enteroscopy, small bowel follow through and computerized tomography in patients with obscure gastrointestinal bleeding, iron deficiency anemia,or suspected Crohn′s disease. It was very sensitive for the diagnosis of small bowel tumors and for survailance of small bowel pathology in patients with Gardner syndrome or familial adenomatous polyposis syndrome. Its role in celiac disease and in patients with known Crohn′s disease was currently being investigated.CONCLUSION: Capsule video endoscopy is a superior and more sensitive diagnostic tool than barium follow through,enteroscopy and entero- CT in establishing the diagnosis of many small bowel pathologies.

  20. Perforation forces of the intact porcine anterior lens capsule.

    Science.gov (United States)

    Ullrich, Franziska; Lussi, Jonas; Felekis, Dimitrios; Michels, Stephan; Petruska, Andrew J; Nelson, Bradley J

    2016-09-01

    During the first step of cataract surgery, the lens capsule is perforated and a circular hole is created with a sharp instrument, a procedure called capsulorhexis. To develop automated systems that can assist ophthalmologists during capsulorhexis, the forces required must be quantified. This study investigates perforation forces of the central anterior lens capsule in porcine eyes, which are used as a conservative model for the human eye. A micro-mechanical characterisation method is presented that measures capsular bag perforation forces with a high precision positioning and high-resolution force sensing system. The force during perforation of the anterior lens capsule was measured with various sized needles and indentation speeds and is found to be 15-35mN. A bio-mechanical model is identified that describes an exponential correlation between indentation force and depth, indicating strain hardening behaviour of the porcine anterior lens capsule.

  1. Research on Technology of Filling Sodium into Fuel Test Capsules

    Institute of Scientific and Technical Information of China (English)

    XU; Chi; XIE; Chun; WANG; Shu-xing; MI; Zheng-feng; YU; Tuan-jie; CUI; Chao; WANG; Ming-zheng

    2015-01-01

    In order to provide a high pure sodium environment for properties testing in the fuel research for fast reactor,it is essential to fill sodium into fuel testing capsules.By the method of vacuum,temperature-controlling and inert gas protection,quantificational sodium had been filled into the fuel testing capsules.Fig.1shows the schematic diagram of sodium filling device.Table 1shows

  2. Study of Contact Melting Inside Isothermally Heated Vertical Cylindrical Capsules

    Institute of Scientific and Technical Information of China (English)

    ChenWenzhen; ChengShangmo; 等

    1993-01-01

    Close-contact melting processes of phase change material(PCM) inside vertical cylindrical capsule are studied.PCM are heated bhy the capsule isothermalyy at the bottom and side.The theoretical formulas of the melting rate and thickness of liquid layer during the heat transfer process are obtained by analysis,which are convenient for engineering predictions.Finally,the factors that affect melting are discussed.and conclusions are drawn.

  3. Determining the Optimum Font Size for Braille on Capsule Paper

    OpenAIRE

    Watanabe, Tetsuya

    2014-01-01

    Braille fonts allow us to easily make braille labels on capsule paper. For legibility, fonts should be printed at optimum sizes. To find the optimum sizes for Japanese braille fonts, we conducted an experiment in which a Japanese braille font was printed at various sizes on capsule paper and read and rated by young braille users. The results show that braille printed at 17 and 18 point sizes were read faster and evaluated higher than those printed at smaller or bigger sizes.

  4. Pickering Emulsion-Based Marbles for Cellular Capsules

    Directory of Open Access Journals (Sweden)

    Guangzhao Zhang

    2016-07-01

    Full Text Available The biodegradable cellular capsule, being prepared from simple vaporization of liquid marbles, is an ideal vehicle for the potential application of drug encapsulation and release. This paper reports the fabrication of cellular capsules via facile vaporization of Pickering emulsion marbles in an ambient atmosphere. Stable Pickering emulsion (water in oil was prepared while utilizing dichloromethane (containing poly(l-lactic acid and partially hydrophobic silica particles as oil phase and stabilizing agents respectively. Then, the Pickering emulsion marbles were formed by dropping emulsion into a petri dish containing silica particles with a syringe followed by rolling. The cellular capsules were finally obtained after the complete vaporization of both oil and water phases. The technique of scanning electron microscope (SEM was employed to research the microstructure and surface morphology of the prepared capsules and the results showed the cellular structure as expected. An in vitro drug release test was implemented which showed a sustained release property of the prepared cellular capsules. In addition, the use of biodegradable poly(l-lactic acid and the biocompatible silica particles also made the fabricated cellular capsules of great potential in the application of sustained drug release.

  5. MALDI-MS-imaging of whole human lens capsule.

    Science.gov (United States)

    Ronci, Maurizio; Sharma, Shiwani; Chataway, Tim; Burdon, Kathryn P; Martin, Sarah; Craig, Jamie E; Voelcker, Nicolas H

    2011-08-05

    The ocular lens capsule is a smooth, transparent basement membrane that encapsulates the lens and is composed of a rigid network of interacting structural proteins and glycosaminoglycans. During cataract surgery, the anterior lens capsule is routinely removed in the form of a circular disk. We considered that the excised capsule could be easily prepared for matrix-assisted laser desorption/ionization time-of-flight mass spectrometry imaging (MALDI-MSI) analysis. MALDI-MSI is a powerful tool to elucidate the spatial distribution of small molecules, peptides, and proteins within tissues. Here, we apply this molecular imaging technique to analyze the freshly excised human lens capsule en face. We demonstrate that novel information about the distribution of proteins by MALDI-MSI can be obtained from this highly compact connective tissue, having no evident histo-morphological characteristics. Trypsin digestion carried out on-tissue is shown to improve MALDI-MSI analysis of human lens capsules and affords high repeatability. Most importantly, MALDI-MSI analysis reveals a concentric distribution pattern of proteins such as apolipoprotein E (ApoE) and collagen IV alpha-1 on the anterior surface of surgically removed lens capsule, which may indicate direct or indirect effects of environmental and mechanical stresses on the human ocular lens.

  6. Electromagnetic wave propagation of wireless capsule endoscopy in human body

    Institute of Scientific and Technical Information of China (English)

    LIM; Eng-Gee; 王炤; 陈瑾慧; TILLO; Tammam; MAN; Ka-lok

    2013-01-01

    Wireless capsule endoscopy(WCE) is a promising technique which has overcome some limitations of traditional diagnosing tools, such as the comfortlessness of the cables and the inability of examining small intestine section. However, this technique is still far from mature and asks for the feasible improvements. For example, the relatively low transmission data rate and the absence of the real-time localization information of the capsule are all important issues. The studies of them rely on the understanding of the electromagnetic wave propagation in human body. Investigation of performance of WCE communication system was carried out by studying electromagnetic(EM) wave propagation of the wireless capsule endoscopy transmission channel. Starting with a pair of antennas working in a human body mimic environment, the signal transmissions and attenuations were examined. The relationship between the signal attenuation and the capsule(transmitter) position, and direction was also evaluated. These results provide important information for real-time localization of the capsule. Moreover, the pair of antennas and the human body were treated as a transmission channel, on which the binary amplitude shift keying(BASK) modulation scheme was used. The relationship between the modulation scheme, data rate and bit error rate was also determined in the case of BASK. With the obtained studies, it make possible to provide valuable information for further studies on the selection of the modulation scheme and the real-time localization of the capsules.

  7. Pentagonal shaped microstrip patch antenna in wireless capsule endoscopy system

    Directory of Open Access Journals (Sweden)

    Bondili Kohitha Bai

    2012-01-01

    Full Text Available Wireless capsule endoscopy is a best option for exploring inaccessible areas of small intestine for inspection of gastrointestinal tract. This technique brings less pain compare to conventional endoscopy technique. The wireless endoscopy system comprises of three main modules: an ingestible capsule that is swallowed by the patient, an external control unit and display device for image display. In this paper we proposed pentagonal shape microstrip patch antenna for wireless capsule endoscopy system. Inhibiting characteristics of a single microstrip patch like low gain, light weight, thin thickness and smaller bandwidth, make it more popular. This kind of antenna is aggressive miniaturized to meet the requirements of the wireless capsule endoscope. The simulation results show that the designed Circular Polarization (CP pentagonal shaped microstrip patch antenna gives axial ratio of 0.6023 at 2.38 GHz and CP axial ratio bandwidth of 36MHz with 1.5%. The antenna designed for wireless capsule endoscopy is a proposed one, which may work effectively when compared to other antennas in the capsule.

  8. Bushen Yisui Capsule ameliorates axonal injury in experimental autoimmune encephalomyelitis

    Institute of Scientific and Technical Information of China (English)

    Ling Fang; Lei Wang; Qi Zheng; Tao Yang; Hui Zhao; Qiuxia Zhang; Kangning Li; Li Zhou; Haiyang Gong; Yongping Fan

    2013-01-01

    A preliminary clinical study by our group demonstrated Bushen Yisui Capsule (formerly cal ed Er-huang Formula) in combination with conventional therapy is an effective prescription for the treat-ment of multiple sclerosis. However, its effect on axonal injury during early multiple sclerosis re-mains unclear. In this study, a MOG 35-55-immunized C57BL/6 mouse model of experimental au-toimmune encephalomyelitis was intragastrical y administered Bushen Yisui Capsule. The results showed that Bushen Yisui Capsule effectively improved clinical symptoms and neurological function of experimental autoimmune encephalomyelitis. In addition, amyloid precursor protein expression was down-regulated and microtubule-associated protein 2 was up-regulated. Experimental findings indicate that the disease-preventive mechanism of Bushen Yisui Capsule in experimental autoim-mune encephalomyelitis was mediated by amelioration of axonal damage and promotion of rege-neration. But the effects of the high-dose Bushen Yisui Capsule group was not better than that of the medium-dose and low-dose Bushen Yisui Capsule group in preventing neurological dysfunction.

  9. Capsule Endoscopy for Portal Hypertensive Enteropathy

    Directory of Open Access Journals (Sweden)

    Seong Ran Jeon

    2016-01-01

    Full Text Available Portal hypertensive enteropathy (PHE is a mucosal abnormality of the small bowel that is observed in patients with portal hypertension (PH and can lead to gastrointestinal bleeding and anemia. The pathogenesis is still not completely understood. The introduction of new endoscopic methods, including capsule endoscopy (CE or balloon-assisted enteroscopy, has increased the detection of these abnormalities. CE can also serve as a road map for deciding subsequent interventions and evaluating the treatment effect. The prevalence of PHE is reportedly 40–70% in patients with PH. Endoscopic findings can be roughly divided into vascular and nonvascular lesions such as inflammatory-like lesions. Traditionally, PHE-associated factors include large esophageal varices, portal hypertensive gastropathy or colopathy, Child-Turcotte-Pugh class B or C, a history of variceal treatment, and acute gastrointestinal bleeding. More recently, on using scoring systems, a high computed tomography or transient elastography score was reportedly PHE-related factors. However, the prevalence of PHE and its related associated factors remain controversial. The management of PHE has not yet been standardized. It should be individualized according to each patient’s situation, the availability of therapy, and each institutional expertise.

  10. Internal capsule stroke in the common marmoset.

    Science.gov (United States)

    Puentes, S; Kaido, T; Hanakawa, T; Ichinohe, N; Otsuki, T; Seki, K

    2015-01-22

    White matter (WM) impairment and motor deficit after stroke are directly related. However, WM injury mechanisms and their relation to motor disturbances are still poorly understood. In humans, the anterior choroidal artery (AChA) irrigates the internal capsule (IC), and stroke to this region can induce isolated motor impairment. The goal of this study was to analyze whether AChA occlusion can injure the IC in the marmoset monkey. The vascular distribution of the marmoset brain was examined by colored latex perfusion and revealed high resemblance to the human brain anatomy. Next, a new approach to electrocoagulate the AChA was developed and chronic experiments showed infarction compromising the IC on magnetic resonance imaging (MRI) scanning (day 4) and histology (day 11). Behavioral analysis was performed using a neurologic score previously developed and our own scoring method. Marmosets showed a decreased score that was still evident at day 10 after AChA electrocoagulation. We developed a new approach able to induce damage to the marmoset IC that may be useful for the detailed study of WM impairment and behavioral changes after stroke in the nonhuman primate.

  11. Modeling gated neutron images of THD capsules

    Energy Technology Data Exchange (ETDEWEB)

    Wilson, Douglas Carl [Los Alamos National Laboratory; Grim, Gary P [Los Alamos National Laboratory; Tregillis, Ian L [Los Alamos National Laboratory; Wilke, Mark D [Los Alamos National Laboratory; Morgan, George L [Los Alamos National Laboratory; Loomis, Eric N [Los Alamos National Laboratory; Wilde, Carl H [Los Alamos National Laboratory; Oertel, John A [Los Alamos National Laboratory; Fatherley, Valerie E [Los Alamos National Laboratory; Clark, David D [Los Alamos National Laboratory; Schmitt, Mark J [Los Alamos National Laboratory; Merrill, Frank E [Los Alamos National Laboratory; Wang, Tai - Sen F [Los Alamos National Laboratory; Danly, Christopher R [Los Alamos National Laboratory; Batha, Steven H [Los Alamos National Laboratory; Patel, M [LLNL; Sepke, S [LLNL; Hatarik, R [LLNL; Fittinghoff, D [LLNL; Bower, D [LLNL; Marinak, M [LLNL; Munro, D [LLNL; Moran, M [LLNL; Hilko, R [NSTEC; Frank, M [LLNL; Buckles, R [NSTEC

    2010-01-01

    Time gating a neutron detector 28m from a NIF implosion can produce images at different energies. The brighter image near 14 MeV reflects the size and symmetry of the capsule 'hot spot'. Scattered neutrons, {approx}9.5-13 MeV, reflect the size and symmetry of colder, denser fuel, but with only {approx}1-7% of the neutrons. The gated detector records both the scattered neutron image, and, to a good approximation, an attenuated copy of the primary image left by scintillator decay. By modeling the imaging system the energy band for the scattered neutron image (10-12 MeV) can be chosen, trading off the decayed primary image and the decrease of scattered image brightness with energy. Modeling light decay from EJ399, BC422, BCF99-55, Xylene, DPAC-30, and Liquid A leads to a preference from BCF99-55 for the first NIF detector, but DPAC 30 and Liquid A would be preferred if incorporated into a system. Measurement of the delayed light from the NIF scintillator using implosions at the Omega laser shows BCF99-55 to be a good choice for down-scattered imaging at 28m.

  12. Analytical Quality check of oil based blend in Flaxilip capsule

    Directory of Open Access Journals (Sweden)

    Rajashree Rane

    2014-12-01

    Full Text Available Analysis of capsules containing blend in the powder form is easy, but it is bit difficult to analyse the soft gelatin capsule containing oil based blend. The purpose of this study was to develop test parameters to determine and supervise the quality of such herbal capsule formulation. Five different lots of soft gelatin Flaxilip capsule containing Linseed oil, Guggulu processed with linseed oil, Garlic oil, Fenugreek oil along with Soyabean oil as an excipient , were selected for the study. All the five lots were subjected to general capsule tests such as determination of average weight and disintegration time. Results obtained were around 1.3500g and 10minutes respectively. Specific test parameters applicable for oils like specific gravity, refractive index, acid value, peroxide value, saponification value, iodine value were applied quantitatively for quality evaluation. Standardised suitable classical methods were applied. Results in all the five lots were found to be well within inhouse limit. All the samples were subjected to heavy metals and microbiological testing. Compliance of corresponding findings with the standard pharmacopoeial guidelines assure the safe intake of the drug. For getting the better effect, the Guggulu that is Commiphora mukul used in the formulation was processed with linseed oil. Its presence was confirmed by carrying out HPTLC for E and Z guggulu sterone. Resemblance of spots at Rf ranging from 0.36 to 0.38 and 0.43 to 0.45 in Toluene : Acetone (9:1 system showed the presence of gugulu in blends of all the lots. Hence by applying all these test parameters one can ensure the quality of the soft gelatin ayurvedic capsule formulation containing oily base like in Flaxilip capsule.

  13. Finding the solution for incomplete small bowel capsule endoscopy

    Institute of Scientific and Technical Information of China (English)

    José; Cotter; Francisca; Dias; de; Castro; Joana; Magalhes; Maria; Joo; Moreira; Bruno; Rosa

    2013-01-01

    AIM:To evaluate whether the use of real time viewer(RTV)and administration of domperidone to patients with delayed gastric passage of the capsule could reduce the rate of incomplete examinations(IE)and improve the diagnostic yield of small bowel capsule endoscopy(SBCE).METHODS:Prospective single center interventional study,from June 2012 to February 2013.Capsule location was systematically checked one hour after ingestion using RTV.If it remained in the stomach,the patient received 10 mg domperidone per os and the location of the capsule was rechecked after 30 min.If the capsule remained in the stomach a second dose of10 mg of domperidone was administered orally.After another 30 min the position was rechecked and if the capsule remained in the stomach,it was passed into the duodenum by upper gastrointestinal(GI)endoscopy.The rate of IE and diagnostic yield of SBCE were compared with those of examinations performed before the use of RTV or domperidone in our Department(control group,January 2009-May 2012).RESULTS:Both groups were similar regarding age,sex,indication,inpatient status and surgical history.The control group included 307 patients,with 48(15.6%)IE.The RTV group included 82 patients,with3(3.7%)IE,P=0.003.In the control group,average gastric time was significantly longer in patients with IE than in patients with complete examination of the small bowel(77 min vs 26 min,P=0.003).In the RTV group,the capsule remained in the stomach one hour after ingestion in 14/82 patients(17.0%)vs 48/307(15.6%)in the control group,P=0.736.Domperidone did not significantly affect small bowel transit time(260min vs 297 min,P=0.229).The capsule detected positive findings in 39%of patients in the control group and 49%in the RTV group(P=0.081).CONCLUSION:The use of RTV and selective administration of domperidone to patients with delayed gastric passage of the capsule significantly reduces incomplete examinations,with no effect on small bowel transit time or diagnostic yield.

  14. Capsule endoscopy in the diagnosis of Crohn’s disease

    Directory of Open Access Journals (Sweden)

    Niv Y

    2013-05-01

    Full Text Available Yaron NivDepartment of Gastroenterology, Rabin Medical Center, Tel Aviv University, Petah Tikva, IsraelAbstract: Crohn’s disease is a chronic inflammatory disorder affecting any part of the gastrointestinal tract, but frequently involves the small and large bowel. Typical presenting symptoms include abdominal pain and diarrhea. Patients with this disorder may also have extraintestinal manifestations, including arthritis, uveitis, and skin lesions. The PillCam™SB capsule is an ingestible disposable video camera that transmits high quality images of the small intestinal mucosa. This enables the small intestine to be readily accessible to physicians investigating for the presence of small bowel disorders, such as Crohn’s disease. Four meta-analyses have demonstrated that capsule endoscopy identifies Crohn’s disease when other methods are not helpful. It should be noted that it is the best noninvasive procedure for assessing mucosal status, but is not superior to ileocolonoscopy, which remains the gold standard for assessment of ileocolonic disease. Mucosal healing along the small bowel can only be demonstrated by an endoscopic procedure such as capsule endoscopy. Achievement of long-term mucosal healing has been associated with a trend towards a decreased need for hospitalization and a decreased requirement for corticosteroid treatment in patients with Crohn’s disease. Recently, we have developed and validated the Capsule Endoscopy Crohn’s Disease Activity Index (also known as the Niv score for Crohn’s disease of the small bowel. The next step is to expand our score to the colon, and to determine the role and benefit of a capsule endoscopy activity score in patients suffering from Crohn’s ileocolitis and/or colitis. This scoring system will also serve to improve our understanding of the impact of capsule endoscopy, and therefore treatment, on the immediate outcome of this disorder. As the best procedure available for assessing

  15. The effect of glicerol and sorbitol plasticizers toward disintegration time of phyto-capsules

    Science.gov (United States)

    Pudjiastuti, Pratiwi; Hendradi, Esti; Wafiroh, Siti; Harsini, Muji; Darmokoesoemo, Handoko

    2016-03-01

    The aim of research is determining the effect of glycerol and sorbitol toward the disintegration time of phyto-capsules, originated capsules from plant polysaccharides. Phyto-capsules were made from polysaccharides and 0.5% (v/v) of glycerol and sorbitol of each. The seven capsules of each were determined the disintegration time using Erweka disintegrator. The mean of disintegration time of phyto-capsules without plasticizers, with glycerol and sorbitol were 25'30"; 45'15" and 35'30" respectively. The color and colorless gelatin capsules showed the mean of disintegration time 7'30" and 2'35" respectively.

  16. Implantable telemetry capsule for monitoring arterial oxygen saturation and heartbeat.

    Science.gov (United States)

    Kuwana, K; Dohi, T; Hashimoto, Y; Matsumoto, K; Shimoyama, I

    2008-01-01

    In this study, we have developed an implantable telemetry capsule for monitoring heartbeat. The capsule has three main functions, monitoring vital signs, transmitting the vital signs, and receiving energy for driving the capsule without wires. We used two wavelengths of LEDs and a photodiode sensitive to the two wavelengths for heartbeat sensor. The arterial oxygen saturation is calculated from the amplitude of the heartbeat signal. We fabricated an FM transmitter whose carrier frequency was 80 MHz. Though the GHz range frequency is generally used in transmission, the attenuation in the human body is large. The size of a common linear antenna is about a quarter of its operating wavelength. We employed a coil-based antenna which can reduce size below the quarter of the wavelength. We fabricated a miniaturized transmitter with the coil-based antenna at lower frequency. Our capsule was driven intermittently. We used a rechargeable battery. When the battery ran down, the battery was charged by wireless using the induced electromotive force. This means that the capsule is capable of monitoring vital signs over the long term. We measured the heartbeat from the middle finger of hand in a water tank as a model of a human body.

  17. Thermohydraulic design of saturated temperature capsule for IASCC irradiation test

    Energy Technology Data Exchange (ETDEWEB)

    Ide, Hiroshi; Matsui, Yoshinori; Itabashi, Yukio [Japan Atomic Energy Research Inst., Oarai, Ibaraki (Japan). Oarai Research Establishment] [and others

    2002-10-01

    An advanced water chemistry controlled irradiation research device is being developed in JAERI, to perform irradiation tests for irradiation assisted stress corrosion cracking (IASCC) research concerned with aging of LWR. This device enables the irradiation tests under the water chemistry condition and the temperature, which simulate the conditions for BWR core internals. The advanced water chemistry controlled irradiation research device is composed of saturated temperature capsule inserted into the JMTR core and the water chemistry control unit installed in the reactor building. Regarding the saturated temperature capsule, the Thermohydraulic design of capsule structure was done, aimed at controlling the specimen's temperature, feeding water velocity on specimen's surface to the environment of BWR nearer. As the result of adopting the new capsule structure based on the design study, it was found out that feeding water velocity at the surface of specimen's is increased to about 10 times as much as before, and nuclear heat generated in the capsule components can be removed safely even in the abnormal event such as the case of loss of feeding water. (author)

  18. Regional material properties of the human hip joint capsule ligaments.

    Science.gov (United States)

    Hewitt, J; Guilak, F; Glisson, R; Vail, T P

    2001-05-01

    The hip joint capsule functions to constrain translation between the femur and acetabulum while allowing rotational and planar movements. Despite the crucial role it plays in the pathogenesis of hip instability, little is known about its biomechanical properties. The goal of this study was to determine the regional material properties of the iliofemoral and ischiofemoral ligaments of the capsule. Ten human cadaveric specimens of each ligament were tested to failure in tension. The stress at failure, strain at failure, strain energy density at failure, toe- and linear-region elastic moduli, and the Poisson's ratio were measured for each ligament. The strain to failure was greatest in the ischiofemoral ligament, while no significant difference was noted in failure stress by region or ligament. The Young's moduli of elasticity ranged from 76.1 to 285.8 MPa among the different ligaments, and were generally consistent with properties previously reported for the shoulder capsule. The elastic moduli and strain energy density at failure differed by region. No significant differences in Poisson's ratio were found by region or ligament. The average Poisson's ratio was approximately 1.4, consistent with anisotropic behavior of ligamentous tissues. Understanding the material properties of the hip capsule may help the orthopaedic surgeon better understand normal ligament function, and thereby choose a surgical approach or strategy of repair. Furthermore, knowledge of the normal mechanical function of the hip capsule ligaments could assist in the evaluation of the success of a repair.

  19. Indications of capsule endoscopy in Crohn´s disease.

    Science.gov (United States)

    Luján-Sanchis, Marisol; Sanchis-Artero, Laura; Suárez-Callol, Patricia; Medina-Chuliá, Enrique

    2014-01-01

    Capsule endoscopy currently plays a relevant role for Crohn´s disease. This manuscript will discuss the current indications and practical uses of capsule endoscopy in this disease. It is a non-invasive technique that represents a significant advance in the endoscopic diagnosis of small bowel conditions. These circumstances, together with its diagnostic yield and excellent tolerability, make it considerably acceptable by both patients and physicians. This paper discusses the current evidence on the specific circumstances where capsule endoscopy may be indicated for three specific scenarios: Suspected Crohn´s disease, indeterminate colitis, and established Crohn´s disease, where it plays an extensive role. Furthermore, the impact and implications of capsule endoscopy results for follow-up are reviewed. These recommendations must be interpreted and applied in the setting of the integral, individual management of these patients. Understanding its appropriate use in daily clinical practice and an analysis of results may define endoscopic scoring systems to assess activity and mucosal healing in this condition. The present role of capsule endoscopy for Crohn´s disease is subject to ongoing review, and appropriate usage uncovers novel applications likely to result in relevant changes for the future management of these patients.

  20. Controllable light capsules employing modified Bessel-Gauss beams

    CERN Document Server

    Gong, Lei; Zhao, Qian; Ren, Yuxuan; Qiu, Xingze; Zhong, Mincheng; Li, Yinmei

    2016-01-01

    We report, in theory and experiment, on a novel class of controlled light capsules with nearly perfect darkness, directly employing intrinsic properties of modified Bessel-Gauss beams. These beams are able to naturally create three-dimensional bottle-shaped region during propagation as long as the parameters are properly chosen. Remarkably, the optical bottle can be controlled to demonstrate various geometries through tuning the beam parameters, thereby leading to an adjustable light capsule. We provide a detailed insight into the theoretical origin and characteristics of the light capsule derived from modified Bessel-Gauss beams. Moreover, a binary digital micromirror device (DMD) based scheme is first employed to shape the bottle beams by precise amplitude and phase manipulation. Further, we demonstrate their ability for optical trapping of core-shell magnetic microparticles, which play a particular role in biomedical research, with holographic optical tweezers. Therefore, our observations provide a new rou...

  1. Rayleigh Taylor Instability Growth in NIC Capsules with Engineered Defects

    Science.gov (United States)

    Peterson, K. J.; Hammel, B. A.; Suter, L. J.; Clark, D. S.; Farley, D. R.; Landen, O. L.; Scott, H.; Moreno, K.; Vesey, R. A.; Herrmann, M. C.; Nakhleh, C. W.; Golovkin, I.; Regan, S. P.; Epstein, R.

    2011-10-01

    In order to achieve thermonuclear burn and energy gain in ICF capsules, the growth of hydrodynamic instabilities must be understood and controlled. Experiments are planned to measure time dependent hydrodynamic instability growth of engineered defects on the surface of NIC capsules using x-ray radiography. We will present an analysis of synthetic radiography from 2D and 3D HYDRA simulations with various x-ray drive fluxes and show how these results will be used to assess code predictions of instability growth and mix. We will also discuss how these results correlate with capsule performance and observables from hot spot self emission imaging and Ge spectroscopy. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.

  2. Inhibitive Effects of Quercetin on Rabbit Tenon Capsule Fibroblasts Proliferation

    Institute of Scientific and Technical Information of China (English)

    Su Liu; Lin Chen

    2005-01-01

    Purpose:To study the inhibitive effects of quercetin (QU) on the fibroblasts proliferation of rabbit Tenon's capsule and its mechanism.Methods: Cultured fibroblasts were exposed to different concentrations of QU solution and investigated by microculture tetrazolium (MTT) assay. The effect of QU was obser ved on cells cycle using the flow cytometer. Besults: QU can suppress the proliferation of rabbit Tenon's capsule fibroblasts in vitro and show a dose-time dependent tendency.Flow cytometer results showed 26.92% cell increase in G1 phase, 23.50% decrease in S phase and 3.42% decrease in G2 phase.Conclusions: QU can suppress the proliferation of rabbit Tenon's capsule fibroblasts in vitro and show a dose-time dependent tendency. QU may effect all phase of cell cycle and inhibit cell proliferation by inhibiting G1 phase transitting to S phase and G2 phase.

  3. Swallowable Wireless Capsule Endoscopy: Progress and Technical Challenges

    Directory of Open Access Journals (Sweden)

    Guobing Pan

    2012-01-01

    Full Text Available Wireless capsule endoscopy (WCE offers a feasible noninvasive way to detect the whole gastrointestinal (GI tract and revolutionizes the diagnosis technology. However, compared with wired endoscopies, the limited working time, the low frame rate, and the low image resolution limit the wider application. The progress of this new technology is reviewed in this paper, and the evolution tendencies are analyzed to be high image resolution, high frame rate, and long working time. Unfortunately, the power supply of capsule endoscope (CE is the bottleneck. Wireless power transmission (WPT is the promising solution to this problem, but is also the technical challenge. Active CE is another tendency and will be the next geneion of the WCE. Nevertheless, it will not come true shortly, unless the practical locomotion mechanism of the active CE in GI tract is achieved. The locomotion mechanism is the other technical challenge, besides the challenge of WPT. The progress about the WPT and the active capsule technology is reviewed.

  4. Wzy-dependent bacterial capsules as potential drug targets.

    Science.gov (United States)

    Ericsson, Daniel J; Standish, Alistair; Kobe, Bostjan; Morona, Renato

    2012-10-01

    The bacterial capsule is a recognized virulence factor in pathogenic bacteria. It likely works as an antiphagocytic barrier by minimizing complement deposition on the bacterial surface. With the continual rise of bacterial pathogens resistant to multiple antibiotics, there is an increasing need for novel drugs. In the Wzy-dependent pathway, the biosynthesis of capsular polysaccharide (CPS) is regulated by a phosphoregulatory system, whose main components consist of bacterial-tyrosine kinases (BY-kinases) and their cognate phosphatases. The ability to regulate capsule biosynthesis has been shown to be vital for pathogenicity, because different stages of infection require a shift in capsule thickness, making the phosphoregulatory proteins suitable as drug targets. Here, we review the role of regulatory proteins focusing on Streptococcus pneumoniae, Staphylococcus aureus, and Escherichia coli and discuss their suitability as targets in structure-based drug design.

  5. Demonstration of bacteroides capsules by light microscopy and ultrastructural cytochemistry.

    Science.gov (United States)

    Strohm, H; Payne, C M; Ryan, K J

    1983-05-01

    Forty-six anaerobic gram-negative bacilli, including 26 members of the Bacteroides fragilis group (BFG), were examined for capsules by the India ink technic. Thirty-five were encapsulated, including all the BFG strains. As a follow-up, seven of these isolates and two previously studied reference strains (B. fragilis ATCC 23745 and Bacteroides vulgatus ATCC 8482) were examined for capsules by ultrastructural cytochemistry. Using the periodic acid thiocarbohydrazide silver proteinate (PATCSP) method of Thiéry, all the BFG examined were encapsulated. In addition to the reference strains, this included one strain of B. fragilis and four of Bacteroides thetaiotaomicron. One non-BFG strain showed no capsular material. Differences between these results and those reported previously with the ruthenium red technic may reflect species differences in the chemical composition of Bacteroides capsules.

  6. Trade study for the disposition of cesium and strontium capsules

    Energy Technology Data Exchange (ETDEWEB)

    Claghorn, R.D.

    1996-03-01

    This trade study analyzes alternatives for the eventual disposal of cesium and strontium capsules currently stored at the Waste Encapsulation and Storage Facility as by-product. However, for purposes of this study, it is assumed that at some time in the future, the capsules will be declared high-level waste and therefore will require disposal at an offsite geologic repository. The study considered numerous alternatives and selected three for detailed analysis: (1) overpack and storage at high-level waste canister storage building, (2) overpack at the high-level waste vitrification facility followed by storage at a high-level waste canister storage building, and (3) blend capsule contents with other high-level waste feed streams and vitrify at the high-level waste vitrification facility.

  7. Development of Beryllium-Copper Alloy Ignition Capsules

    Science.gov (United States)

    Cooley, Jason; Alexander, David; Thoma, Daniel; Field, Robert; Day, Robert; Cameron, Bernard; Nobile, Arthur; Rivera, Gerald; Kelly, Ann; Papin, Pallas; Schulze, Roland; Dauelsberg, Lawrence; Alexander, Neil; Galix, Remy

    2004-11-01

    Cu-doped Be capsules are being developed for ignition on the National Ignition Facility (NIF). Our fabrication approach is based on bonding of cylindrical parts containing precision machined hemispherical cavities, followed by machining an external spherical contour to produce a spherical shell. While we have demonstrated this approach, there are several key issues that need to be resolved before a shell meeting NIF specifications can be produced. These issues are synthesis of high purity small grain size Be0.9at%Cu alloy, formation of a strong hemishell bond that will allow the capsule to contain its 400 atm fill gas at room temperature, precision machining and polishing of the capsule to meet stringent specifications for surface finish and spherical quality, and filling with DT. In this paper we report on the progress that has been made in resolving these key issues.

  8. First beryllium capsule implosions on the National Ignition Facility

    Science.gov (United States)

    Kline, J. L.; Yi, S. A.; Simakov, A. N.; Olson, R. E.; Wilson, D. C.; Kyrala, G. A.; Perry, T. S.; Batha, S. H.; Zylstra, A. B.; Dewald, E. L.; Tommasini, R.; Ralph, J. E.; Strozzi, D. J.; MacPhee, A. G.; Callahan, D. A.; Hinkel, D. E.; Hurricane, O. A.; Milovich, J. L.; Rygg, J. R.; Khan, S. F.; Haan, S. W.; Celliers, P. M.; Clark, D. S.; Hammel, B. A.; Kozioziemski, B.; Schneider, M. B.; Marinak, M. M.; Rinderknecht, H. G.; Robey, H. F.; Salmonson, J. D.; Patel, P. K.; Ma, T.; Edwards, M. J.; Stadermann, M.; Baxamusa, S.; Alford, C.; Wang, M.; Nikroo, A.; Rice, N.; Hoover, D.; Youngblood, K. P.; Xu, H.; Huang, H.; Sio, H.

    2016-05-01

    The first indirect drive implosion experiments using Beryllium (Be) capsules at the National Ignition Facility confirm the superior ablation properties and elucidate possible Be-ablator issues such as hohlraum filling by ablator material. Since the 1990s, Be has been the preferred Inertial Confinement Fusion (ICF) ablator because of its higher mass ablation rate compared to that of carbon-based ablators. This enables ICF target designs with higher implosion velocities at lower radiation temperatures and improved hydrodynamic stability through greater ablative stabilization. Recent experiments to demonstrate the viability of Be ablator target designs measured the backscattered laser energy, capsule implosion velocity, core implosion shape from self-emission, and in-flight capsule shape from backlit imaging. The laser backscatter is similar to that from comparable plastic (CH) targets under the same hohlraum conditions. Implosion velocity measurements from backlit streaked radiography show that laser energy coupling to the hohlraum wall is comparable to plastic ablators. The measured implosion shape indicates no significant reduction of laser energy from the inner laser cone beams reaching the hohlraum wall as compared with plastic and high-density carbon ablators. These results indicate that the high mass ablation rate for beryllium capsules does not significantly alter hohlraum energetics. In addition, these data, together with data for low fill-density hohlraum performance, indicate that laser power multipliers, required to reconcile simulations with experimental observations, are likely due to our limited understanding of the hohlraum rather than the capsule physics since similar multipliers are needed for both Be and CH capsules as seen in experiments.

  9. Silicone Oil Tamponade Combined with Lensectomy Preserving Anterior Lens Capsule

    Institute of Scientific and Technical Information of China (English)

    LuL; YangJ

    1999-01-01

    Purpose:To investigate the therapeutic effect and indicatio n of silicone oil tamponade combined with lensectomy preserving anterior lens capsule.Methods:Silicone oil tamponade combined with lensectomy preserving anterior lens capsule was performed in 33 cases (33 eyes)of high myopia ,proliferative vitroretinopathy(PVR)D grade and giant retinal tear(GRT).10 cases were onlyeye and 11 cases had harder nucleus of lens.The surgical methods included:1.smashing lens nucleus and lensectomy preserving complete anterior capsule;2,vitrectomy and membrane peeling;3,usage of liquid perfluorocarbin or retinotomy or drainage;4.silicone oil tamponade;5.postoperative Nd;YAG laser for anterior capsulectomy. Results:Follow-up time was 6 months or more in 29 cases.Total retinal reattachment was achieved in 22 cases,macular retinal reattachment in 5 cases.The visual acuity was 20/800 to 20/200 in 13 cases,20/100 to 20/50 in 12 cases.Visual acuity was significantly improved in GRT group(P<0.05).Complications included unexpected anterior capsule break intraoperatively,anterior capsule opacity,silicone oil emulsification and liquid perfluorocarbin remainig postoperatively.Conclusions:Silicone oil tamponade combined with lensectomy preserving anterior capsule was safe and can reduce the operative complications.The indications included:1.GRT complicated with high myopia;2,advanced PVR cases complicated with high myopia in which silicone oil must be used;3.severe lens opacity cases in which silicone oil must be used;4.complex retinal detachment of only ye.

  10. Chemical inhibition of bacterial protein tyrosine phosphatase suppresses capsule production.

    Science.gov (United States)

    Standish, Alistair J; Salim, Angela A; Zhang, Hua; Capon, Robert J; Morona, Renato

    2012-01-01

    Capsule polysaccharide is a major virulence factor for a wide range of bacterial pathogens, including Streptococcus pneumoniae. The biosynthesis of Wzy-dependent capsules in both gram-negative and -positive bacteria is regulated by a system involving a protein tyrosine phosphatase (PTP) and a protein tyrosine kinase. However, how the system functions is still controversial. In Streptococcus pneumoniae, a major human pathogen, the system is present in all but 2 of the 93 serotypes found to date. In order to study this regulation further, we performed a screen to find inhibitors of the phosphatase, CpsB. This led to the observation that a recently discovered marine sponge metabolite, fascioquinol E, inhibited CpsB phosphatase activity both in vitro and in vivo at concentrations that did not affect the growth of the bacteria. This inhibition resulted in decreased capsule synthesis in D39 and Type 1 S. pneumoniae. Furthermore, concentrations of Fascioquinol E that inhibited capsule also lead to increased attachment of pneumococci to a macrophage cell line, suggesting that this compound would inhibit the virulence of the pathogen. Interestingly, this compound also inhibited the phosphatase activity of the structurally unrelated gram-negative PTP, Wzb, which belongs to separate family of protein tyrosine phosphatases. Furthermore, incubation with Klebsiella pneumoniae, which contains a homologous phosphatase, resulted in decreased capsule synthesis. Taken together, these data provide evidence that PTPs are critical for Wzy-dependent capsule production across a spectrum of bacteria, and as such represents a valuable new molecular target for the development of anti-virulence antibacterials.

  11. Chemical inhibition of bacterial protein tyrosine phosphatase suppresses capsule production.

    Directory of Open Access Journals (Sweden)

    Alistair J Standish

    Full Text Available Capsule polysaccharide is a major virulence factor for a wide range of bacterial pathogens, including Streptococcus pneumoniae. The biosynthesis of Wzy-dependent capsules in both gram-negative and -positive bacteria is regulated by a system involving a protein tyrosine phosphatase (PTP and a protein tyrosine kinase. However, how the system functions is still controversial. In Streptococcus pneumoniae, a major human pathogen, the system is present in all but 2 of the 93 serotypes found to date. In order to study this regulation further, we performed a screen to find inhibitors of the phosphatase, CpsB. This led to the observation that a recently discovered marine sponge metabolite, fascioquinol E, inhibited CpsB phosphatase activity both in vitro and in vivo at concentrations that did not affect the growth of the bacteria. This inhibition resulted in decreased capsule synthesis in D39 and Type 1 S. pneumoniae. Furthermore, concentrations of Fascioquinol E that inhibited capsule also lead to increased attachment of pneumococci to a macrophage cell line, suggesting that this compound would inhibit the virulence of the pathogen. Interestingly, this compound also inhibited the phosphatase activity of the structurally unrelated gram-negative PTP, Wzb, which belongs to separate family of protein tyrosine phosphatases. Furthermore, incubation with Klebsiella pneumoniae, which contains a homologous phosphatase, resulted in decreased capsule synthesis. Taken together, these data provide evidence that PTPs are critical for Wzy-dependent capsule production across a spectrum of bacteria, and as such represents a valuable new molecular target for the development of anti-virulence antibacterials.

  12. Characterization of the Kingella kingae polysaccharide capsule and exopolysaccharide.

    Directory of Open Access Journals (Sweden)

    Kimberly F Starr

    Full Text Available Recent evidence indicates that Kingella kingae produces a polysaccharide capsule. In an effort to determine the composition and structure of this polysaccharide capsule, in the current study we purified capsular material from the surface of K. kingae strain 269-492 variant KK01 using acidic conditions to release the capsule and a series of steps to remove DNA, RNA, and protein. Analysis of the resulting material by gas chromatography and mass spectrometry revealed N-acetyl galactosamine (GalNAc, 3-deoxy-D-manno-oct-2-ulosonic acid (Kdo, and galactose (Gal. Further analysis by NMR demonstrated two distinct polysaccharides, one consisting of GalNAc and Kdo with the structure →3-β-GalpNAc-(1→5-β-Kdop-(2→ and the other containing galactose alone with the structure →5-β-Galf-(1→. Disruption of the ctrA gene required for surface localization of the K. kingae polysaccharide capsule resulted in elimination of GalNAc and Kdo but had no effect on the presence of Gal in bacterial surface extracts. In contrast, deletion of the pamABCDE locus involved in production of a reported galactan exopolysaccharide eliminated Gal but had no effect on the presence of GalNAc and Kdo in surface extracts. Disruption of ctrA and deletion of pamABCDE resulted in a loss of all carbohydrates in surface extracts. These results establish that K. kingae strain KK01 produces a polysaccharide capsule with the structure →3-β-GalpNAc-(1→5-β-Kdop-(2→ and a separate exopolysaccharide with the structure →5-β-Galf-(1→. The polysaccharide capsule and the exopolysaccharide require distinct genetic loci for surface localization.

  13. Effect of small bowel preparation with simethicone on capsule endoscopy

    Institute of Scientific and Technical Information of China (English)

    You-hong FANG; Chun-xiao CHEN; Bing-ling ZHANG

    2009-01-01

    Background: Capsule endoscopy is a novel non-invasive method for visualization of the entire small bowel. The diagnostic yield of capsule endoscopy depends on the quality of visualization of the small bowel mucosa and its complete passage through the small bowel. To date, there is no standardized protocol for bowel preparation before capsule endoscopy. The addition ofsimethicone in the bowel preparation for the purpose of reducing air bubbles in the intestinal lumen had only been studied by a few investigators. Methods: Sixty-four participants were randomly divided into two groups to receive a bowel preparation of polyethylene glycol (PEG) solution (Group 1) and both PEG solution and simethicone (Group 2). The PEG solution and sime-thicone were taken the night before and 20 min prior to capsule endoscopy, respectively. Frames taken in the small intestine were examined and scored for luminal bubbles by two professional capsule endoscopists. Gastric emptying time and small bowel transit time were also recorded. Results: Simethicone significantly reduced luminal bubbles both in the proximal and distal small intes-tines. The mean time proportions with slight bubbles in the proximal and distal intestines in Group 2 were 97.1% and 99.0%, respectively, compared with 67.2% (P<0.001) and 68.8% (P<0.001) in Group 1. Simethicone had no effect on mean gastric emptying time, 32.08 min in Group 2 compared with 30.88 min in Group 1 (P=0.868), but it did increase mean small intestinal transit time from 227.28 to 281.84 min (P=0.003). Conclusion: Bowel preparation with both PEG and simethicone significantly reduced bubbles in the intestinal lumen and improved the visualization of the small bowel by capsule endoscopy without any side effects observed.

  14. Preshot Predictions for Defect Induced Mix (DIME) Capsules

    Energy Technology Data Exchange (ETDEWEB)

    Bradley, Paul A. [Los Alamos National Laboratory; Krasheninnikova, Natalia S. [Los Alamos National Laboratory; Tregillis, Ian L. [Los Alamos National Laboratory; Schmitt, Mark J. [Los Alamos National Laboratory

    2012-07-31

    In this memo, we evaluate the most probable yield and other results for the Defect Induced Mix (DIME-12A) Polar Direct Drive (PDD) capsule-only shots. We evaluate the expected yield, bang time, burn averaged ion temperature, and the average electron temperature of the Ge line-emitting region. We also include synthetic images of the capsule backlit by Cu K-{alpha} emission (8.39 keV) and core self-emission synthetic images. This memo is a companion to the maximum credible yield memo (LA-UR-12-00287) published earlier.

  15. Steady state heat transfer in ORR irradiation capsules. Part 2

    Energy Technology Data Exchange (ETDEWEB)

    Michel, R.C.; Michaels, S.L.; Wilkes, G.R.

    1976-04-26

    The mathematical model developed by Stiros for prediction of temperature profiles in ORR irradiation capsules was modified and a numerical solution obtained. A Fortran computer program was written to solve the generalized finite difference equations applied to a fixed lattice system superimposed on the capsule cross section. The Liebmann iterative method was employed. The solution accounts for changes in internal heat generation, thermal expansion, and thermal conductivity induced by both temperature and fluence. The computed temperatures deviated from actual experimental measurements in the fuel rods by less than 2.0 percent.

  16. A novel localization method for noninvasive monitoring capsule

    Institute of Scientific and Technical Information of China (English)

    He Wenhui; Yan Guozheng; Jiang Pingping; Guo Xudong

    2006-01-01

    Noninvasive monitoring capsule for gastrointestinal tract can be swallowed by patient. It is of great importance for the physician to monitor the precise position of capsule in gastrointestinal tract. The authors investigated a novel method for it. Using three coils with DC current to excite magnetic field and one triaxial magnetoresistive sensor to measure the excited magnetic vectors, they tried to solve the problem.The authors provided the localization principle of the method and analyzed it by an experiment, too. The method may be applied in practice in the future though it is still immature now.

  17. Colon capsule endoscopy: European Society of Gastrointestinal Endoscopy (ESGE) Guideline.

    Science.gov (United States)

    Spada, C; Hassan, C; Galmiche, J P; Neuhaus, H; Dumonceau, J M; Adler, S; Epstein, O; Gay, G; Pennazio, M; Rex, D K; Benamouzig, R; de Franchis, R; Delvaux, M; Devière, J; Eliakim, R; Fraser, C; Hagenmuller, F; Herrerias, J M; Keuchel, M; Macrae, F; Munoz-Navas, M; Ponchon, T; Quintero, E; Riccioni, M E; Rondonotti, E; Marmo, R; Sung, J J; Tajiri, H; Toth, E; Triantafyllou, K; Van Gossum, A; Costamagna, G

    2012-05-01

    PillCam colon capsule endoscopy (CCE) is an innovative noninvasive, and painless ingestible capsule technique that allows exploration of the colon without the need for sedation and gas insufflation. Although it is already available in European and other countries, the clinical indications for CCE as well as the reporting and work-up of detected findings have not yet been standardized. The aim of this evidence-based and consensus-based guideline, commissioned by the European Society of Gastrointestinal Endoscopy (ESGE) is to furnish healthcare providers with a comprehensive framework for potential implementation of this technique in a clinical setting.

  18. Mechanism of Erhuang capsule for treatment of multiple sclerosis.

    Science.gov (United States)

    Li, Kangning; Fan, Yongping; Yang, Tao; Wang, Lei

    2013-02-25

    Erhuang capsule, a typical formula based on traditional Chinese medicine theory, is widely used to ameliorate multiple sclerosis, inflammation and side effects of glucocorticoid treatment. Oligodendrocyte precursor cells are neural stem cells that are important for myelin repair and regeneration. In the present study, Erhuang capsule effectively improved clinical symptoms and neurological function scores, reduced mortality and promoted recovery of neurological functions of mice with experimental autoimmune encephalomyelitis. The mechanism of action involved significant increases in oligodendrocyte precursor cell proliferation in specific regions of the brain and spinal cord, increased oligodendrocyte lineage gene 2 expression and enhanced oligodendrocyte precursor cell differentiation.

  19. Mechanism of Erhuang capsule for treatment of multiple sclerosis☆

    Science.gov (United States)

    Li, Kangning; Fan, Yongping; Yang, Tao; Wang, Lei

    2013-01-01

    Erhuang capsule, a typical formula based on traditional Chinese medicine theory, is widely used to ameliorate multiple sclerosis, inflammation and side effects of glucocorticoid treatment. Oligodendrocyte precursor cells are neural stem cells that are important for myelin repair and regeneration. In the present study, Erhuang capsule effectively improved clinical symptoms and neurological function scores, reduced mortality and promoted recovery of neurological functions of mice with experimental autoimmune encephalomyelitis. The mechanism of action involved significant increases in oligodendrocyte precursor cell proliferation in specific regions of the brain and spinal cord, increased oligodendrocyte lineage gene 2 expression and enhanced oligodendrocyte precursor cell differentiation. PMID:25206695

  20. Capsule implosions driven by dynamic hohlraum x-rays

    Science.gov (United States)

    Bailey, James

    2005-10-01

    Dynamic hohlraum experiments at the Z facility already implode capsules with up to 80 kJ absorbed x-ray energy. However, many challenging issues remain for ICF. The present experiments use diagnostic capsules to address two of these issues: symmetry measurement and control and building understanding of the capsule/hohlraum implosion system. A suite of x-ray spectrometers record time and space resolved spectra emitted by Ar tracer atoms in the implosion core, simultaneously from up to three different quasi-orthogonal directions. Comparing the results with simulation predictions provide severe tests of understanding. These data also can used to produce a tomographic reconstruction of the time resolved core temperature and density profiles. X-ray and neutron diagnostics are used to examine how the implosion conditions change as the capsule design changes. The capsule design changes include variations in CH wall thickness and diameter, Ge-doped CH shells, and SiO2 shells. In addition, a new campaign investigating Be capsule implosions is beginning. Be capsules may offer superior performance for dynamic hohlraum research and it may be possible to investigate NIF-relevant Be implosion issues such as the fill tube effects, sensitivity to columnar growth associated with sputtered Be capsule fabrication, and the effect of Cu dopants on implosion conditions. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the U.S. Dept. of Energy under contract No. DE-AC04-94AL85000. * In collaboration with G.A. Rochau, G.A. Chandler, S.A. Slutz, P.W. Lake, G. Cooper, G.S. Dunham, R.J. Leeper, R. Lemke, T.A. Mehlhorn, T.J. Nash, D.S. Nielsen, K. Peterson, C.L. Ruiz, D.B. Sinars, J. Torres, W. Varnum, Sandia; R.C. Mancini, T.J. Buris-Mog, UNR; I. Golovkin, J.J. MacFarlane, PRISM; A. Nikro, D. Steinman, J.D. Kilkenny, H. Xu, General Atomics; M. Bump, T.C. Moore, K-tech; D.G. Schroen, Schafer

  1. A parametric study on ice formation inside a spherical capsule

    Energy Technology Data Exchange (ETDEWEB)

    Ismail, K.A.R.; Silva, T.M. da [Depto. de Engenharia Termica e de Fluidos - FEM-UNICAMP CP: 6122, CEP 13083-970, SP, Campinas (Brazil); Henriquez, J.R. [Depto. de Engenharia Mecanica - DEMEC, UFPE, CEP 50740-530, PE, Recife (Brazil)

    2003-09-01

    This paper reports the results of a numerical study on the heat transfer during the process of solidification of water inside a spherical capsule. The governing equations of the problem and associated boundary conditions were formulated and solved using a finite difference approach and a moving grid scheme. The model was optimized and the numerical predictions were validated by comparison with experimental results realized by the authors. The model was also used to investigate the effects of the size and material of the shell, initial temperature of the phase change material and the external temperature of the spherical capsule on the solidified mass fraction and the time for the complete solidification. (authors)

  2. Mechanism of Erhuang capsule for treatment of multiple sclerosis

    Institute of Scientific and Technical Information of China (English)

    Kangning Li; Yongping Fan; Tao Yang; Lei Wang

    2013-01-01

    Erhuang capsule, a typical formula based on traditional Chinese medicine theory, is widely used to ameliorate multiple sclerosis, inflammation and side effects of glucocorticoid treatment. Oligodendrocyte precursor cells are neural stem cells that are important for myelin repair and regeneration. In the present study, Erhuang capsule effectively improved clinical symptoms and neurological function scores, reduced mortality and promoted recovery of neurological functions of mice with experimental autoimmune encephalomyelitis. The mechanism of action involved significant increases in oligodendrocyte precursor cell proliferation in specific regions of the brain and spinal cord, increased oligodendrocyte lineage gene 2 expression and enhanced oligodendrocyte precursor cell differentiation.

  3. Gravimetric Analysis of Particulate Matter using Air Samplers Housing Internal Filtration Capsules

    OpenAIRE

    O'Connor, Sean; O'Connor, Paula Fey; Feng, H. Amy; Ashley, Kevin

    2014-01-01

    An evaluation was carried out to investigate the suitability of polyvinyl chloride (PVC) internal capsules, housed within air sampling devices, for gravimetric analysis of airborne particles collected in workplaces. Experiments were carried out using blank PVC capsules and PVC capsules spiked with 0,1 – 4 mg of National Institute of Standards and Technology Standard Reference Material® (NIST SRM) 1648 (Urban Particulate Matter) and Arizona Road Dust (Air Cleaner Test Dust). The capsules were ...

  4. 77 FR 66621 - Draft Guidance for Industry on Bioequivalence Recommendation for Lenalidomide Capsules; Availability

    Science.gov (United States)

    2012-11-06

    ... availability of revised draft BE recommendations for lenalidomide capsules. Revlimid (lenalidomide capsules.... Revlimid is designated as the reference listed drug, and therefore any ANDAs for generic lenalidomide capsules must demonstrate BE to the Revlimid prior to approval. There are no approved ANDAs for...

  5. Les Habitats: Culture Capsules in English for Use in Beginning French Classes.

    Science.gov (United States)

    Hofts, Jan; And Others

    Eight culture capsules describing various aspects of French housing are presented. Each capsule includes a French-American contrast and gives ideas for classroom presentation and student activities. The capsules deal with: le logement, les immeubles, les exterieurs, la minuterie, les portes, la salle de bain, le refrigerateur, and culture grains…

  6. Investigating obscure gastrointestinal bleeding : capsule endoscopy or double balloon enteroscopy?

    NARCIS (Netherlands)

    Westerhof, J.; Weersma, R. K.; Koornstra, J. J.

    2009-01-01

    The possibility to visualise the small bowel has dramatically improved with the introduction of capsule endoscopy (CE) and double balloon enteroscopy (DBE). CE and DBE have become standard practice in investigating suspected diseases of the small bowel. An important reason to perform small bowel inv

  7. Treatment of hyperlipoidemia by Xiaozhi capsule: a clinical efficacy research

    Institute of Scientific and Technical Information of China (English)

    王建平

    2013-01-01

    Objective To observe the clinical effect and efficacy of Xiaozhi Capsule (XZC) ,a Chinese medicine preparation for tonifying Gan-Shen,invigorating Pi to dissipate dampness (TGSIPDD) on total cholesterol (TC) ,triglyceride (TG) ,high-density lipoprotein cholesterol (HDLC) ,low-density lipoprotein cholesterol (LDL-C) ,and

  8. Motion of an elastic capsule in a constricted microchannel

    CERN Document Server

    Touchard, Antoine; Zhu, Lailai; Brandt, Luca

    2014-01-01

    We study the motion of an elastic capsule through a microchannel characterized by a localized constriction. We consider a capsule with a stress-free spherical shape and impose its steady state configuration in an infinitely long straight channel as the initial condition for our calculations. We report how the capsule deformation, velocity, retention time, and maximum stress of the membrane are affected by the capillary number, Ca, and the constriction shape. We estimate the deformation by measuring the variation of the three-dimensional surface area and a series of alternative quantities easier to extract from experiments. These are the Taylor parameter, the perimeter and the area of the capsule in the spanwise plane. We find that the perimeter is the quantity that reproduces the behavior of the three-dimensional surface area the best. We observe that, in general, area-deformation correlated quantities grow linearly with Ca, while velocity-correlated quantities saturate for large Ca but display a steeper incr...

  9. At a watershed? Technical developments in wireless capsule endoscopy.

    Science.gov (United States)

    Swain, Paul

    2010-10-01

    This article reviews some of the technical developments that allowed the introduction of the wireless capsule 10 years ago into human usage. Technical advances and commercial competition have substantially improved the performance of clinical capsule endoscopy, especially in optical quality. Optical issues including the airless environment, depth of focus, dome reflection, the development of white light light-emitting diodes, exposure length and the advent of adaptive illumination are discussed. The competition between charge coupled devices and complementary metal oxide silicone technologies for imaging, lens improvements and the requirements for different frame rates and their associated power management strategies and battery type choices and the introduction of field enhancement methods into commercial capsule technology are considered. Capsule technology stands at a watershed. It is mainly confined to diagnostic small intestinal imaging. It might overtake other forms of conventional diagnostic endoscopy, especially colonoscopy but also gastroscopy and esophagoscopy but has to improve both technically and compete in price. It might break out of its optical diagnostic confinement and become a therapeutic modality. To make this leap there have to be several technical advances especially in biopsy, command, micromechanical internal movements, remote controlled manipulation and changes in power management, which may include external power transmission.

  10. Conservative integrated treatment of adhesive capsulitis of the shoulder

    Science.gov (United States)

    RUSSO, ADRIANO; ARRIGHI, ANNALISA; VIGNALE, LUIGI; MOLFETTA, LUIGI

    2014-01-01

    Purpose the aim of this study was to present the results of a conservative treatment for adhesive capsulitis based on an original protocol of combined pharmacological and rehabilitation treatment. Methods fifty-two patients with idiopathic adhesive capsulitis were enrolled in the present study. The treatment protocol included the use of hyaluronic acid and anaesthetic periarticular and intra-articular injections followed by a specific program of capsule and muscle stretching. Results the results of this treatment showed complete recovery of range of motion (ROM) in 50 of the 52 cases. The mean pre-treatment ROM values were: 85° for forward elevation, 75° for abduction, 25° for external rotation, and 15° for internal rotation. The post-treatment mean ROM values showed marked improvements: 175° for forward elevation, 175° for abduction, 87.5° for external rotation and 75° for internal rotation. Conclusions conservative treatment of adhesive capsulitis based on a combined pharmacological and rehabilitation approach was found to be effective in resolving pain and stiffness in 96% of the patients. Level of evidence level IV, therapeutic case series. PMID:25606536

  11. Ingestible capsule for remote controlled release of a substance

    DEFF Research Database (Denmark)

    2014-01-01

    structure, responsive to microwave electromagnetic radiation, is attached to a first wall portion of the capsule wall structure which comprises a lossy dielectric material. At least a predetermined segment of the first wall portion is heated by received microwave electromagnetic radiation to trigger...

  12. Theranostic Multilayer Capsules for Ultrasound Imaging and Guided Drug Delivery.

    Science.gov (United States)

    Chen, Jun; Ratnayaka, Sithira; Alford, Aaron; Kozlovskaya, Veronika; Liu, Fei; Xue, Bing; Hoyt, Kenneth; Kharlampieva, Eugenia

    2017-03-28

    Despite the accessibility of ultrasound, the clinical potential of ultrasound-active theranostic agents has not been fully realized because it requires combining sufficient imaging contrast, high encapsulation efficiency, and ultrasound-triggered release in one entity. We report on theranostic polymer microcapsules composed of hydrogen-bonded multilayers of tannic acid and poly(N-vinylpyrrolidone) that produce high imaging contrast and deliver the anticancer drug doxorubicin upon low-power diagnostic or high-power therapeutic ultrasound irradiation. These capsules exhibit excellent imaging contrast in both brightness and harmonic modes and show prolonged contrast over six months, unlike commercially available microbubbles. We also demonstrate low-dose gradual and high-dose fast release of doxorubicin from the capsules by diagnostic (∼100 mW/cm(2)) and therapeutic (>10 W/cm(2)) ultrasound irradiation, respectively. We show that the imaging contrast of the capsules can be controlled by varying the number of layers, polymer type (relatively rigid tannic acid versus more flexible poly(methacrylic acid)), and polymer molecular weight. In vitro studies demonstrate that 50% doxorubicin release from ultrasound-treated capsules induces 97% cytotoxicity to MCF-7 human cancer cells, while no cytotoxicity is found without the treatment. Considering the strong ultrasound imaging contrast, high encapsulation efficiency, biocompatibility, and tunable drug release, these microcapsules can be used as theranostic agents for ultrasound-guided chemotherapy.

  13. Additional effective dose by patients undergoing NAI-131 capsules therapy

    Energy Technology Data Exchange (ETDEWEB)

    Orlic, M.; Jovanovic, M.; Spasic Jokic, V.; Cuknic, O.; Ilic, Z.; Vranjes Djuric, S. [VINCA - Institute of Nuclear Sciences, Belgrade, Serbia and Montenegro (Yugoslavia)

    2006-07-01

    Capsules or solutions containing Na{sup 131}I are indicated for the therapy of some thyroid carcinomas such as functioning metastatic papillary or follicular carcinoma of the thyroid; and for the treatment of hyperthyroidism (diffuse toxic goiter and single or multiple toxic nodular goiter). The recommended dosage ranges of Na{sup 131}I capsules or solution for the therapy of the average patient (70 kg) are: (3.7-5.55) GBq for ablation of normal thyroid tissue; (3.7-7.4) GBq for subsequent treatments; a (148-370) MBq for hyperthyroidism. The purpose of this paper is to calculate effective dose as a result of iodine-131 capsules remaining in stomach before absorption starts. This result can determine the disadvantage of capsule versus solution containing sodium iodine-131 (Na{sup 131}I) in radionuclide therapy application from radiation protection point of view. The Monte Carlo code MCNP4b was used to model transport of gamma and beta particles emitted by radionuclide {sup 131}I treated as a point source at the bottom of stomach. Absorbed energy per unit transformation in stomach and surrounding organs has been calculated. (authors)

  14. 21 CFR 520.2100 - Selenium, vitamin E capsules.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 6 2010-04-01 2010-04-01 false Selenium, vitamin E capsules. 520.2100 Section 520...) ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS ORAL DOSAGE FORM NEW ANIMAL DRUGS § 520.2100 Selenium, vitamin... to 1 milligram of selenium) and 56.2 milligrams of vitamin E (68 I.U.) (as d-alpha tocopheryl...

  15. Ultrahigh speed en face OCT capsule for endoscopic imaging.

    Science.gov (United States)

    Liang, Kaicheng; Traverso, Giovanni; Lee, Hsiang-Chieh; Ahsen, Osman Oguz; Wang, Zhao; Potsaid, Benjamin; Giacomelli, Michael; Jayaraman, Vijaysekhar; Barman, Ross; Cable, Alex; Mashimo, Hiroshi; Langer, Robert; Fujimoto, James G

    2015-04-01

    Depth resolved and en face OCT visualization in vivo may have important clinical applications in endoscopy. We demonstrate a high speed, two-dimensional (2D) distal scanning capsule with a micromotor for fast rotary scanning and a pneumatic actuator for precision longitudinal scanning. Longitudinal position measurement and image registration were performed by optical tracking of the pneumatic scanner. The 2D scanning device enables high resolution imaging over a small field of view and is suitable for OCT as well as other scanning microscopies. Large field of view imaging for screening or surveillance applications can also be achieved by proximally pulling back or advancing the capsule while scanning the distal high-speed micromotor. Circumferential en face OCT was demonstrated in living swine at 250 Hz frame rate and 1 MHz A-scan rate using a MEMS tunable VCSEL light source at 1300 nm. Cross-sectional and en face OCT views of the upper and lower gastrointestinal tract were generated with precision distal pneumatic longitudinal actuation as well as proximal manual longitudinal actuation. These devices could enable clinical studies either as an adjunct to endoscopy, attached to an endoscope, or as a swallowed tethered capsule for non-endoscopic imaging without sedation. The combination of ultrahigh speed imaging and distal scanning capsule technology could enable both screening and surveillance applications.

  16. PHYSIOTHERAPY INTERVENTIONS FOR ADHESIVE CAPSULITIS OF SHOULDER: A SYSTEMATIC REVIEW

    Directory of Open Access Journals (Sweden)

    Jacob Isaac Jason

    2015-12-01

    Full Text Available Objective: The purpose of this study was to conduct a systematic review on various physiotherapy management for adhesive capsulitis of shoulder. Methods: A search of the literature was conducted using Clinical Key, ProQuest and PEDro databases up to September 2015. Search limits included the English language and human studies. Search terms included adhesive capsulitis, frozen shoulder, Physical therapy, Physiotherapy etc. Inclusion criteria: Systematic reviews and randomised controlled trials (RCTs in English language were included if they fulfilled the following criteria: (a patients with adhesive capsulitis were included, (b results on pain and function were reported, and (c a study period of at least two weeks was reported. Articles were assessed using the Jadad (1 scale and Physiotherapy Evidence Database (PEDro scale. ‘High-quality’ was defined as a “yes” score of 50% in Jadad scale and a PEDro rating of 5 out of 10. Totally 17 studies were selected for this systematic review. Conclusion: This study has found sufficient level of evidence for physiotherapy in the treatment of adhesive capsulitis the shoulder. In particular, manual treatment must be combined with commonly indicated exercise or conventional physiotherapy, as it remains the standard care.

  17. Are Social Networking Websites Educational? Information Capsule. Volume 0909

    Science.gov (United States)

    Blazer, Christie

    2009-01-01

    More and more school districts across the country are joining social networking sites, such as Facebook and MySpace. This Information Capsule discusses the frequency with which school districts are using social networking sites, how districts are using the sites, and potential drawbacks associated with their use. Issues for districts to consider…

  18. SITE TECHNOLOGY CAPSULE: NOVOCS EVALUATION AT NAS NORTH ISLAND

    Science.gov (United States)

    This is a SITE Technology Capsule. The MACTEC, Inc. (MACTEC), NoVOCs(TM) in-well volatile organic compounds (VOC) stripping technology is an in-situ groundwater remediation technology designed for the cleanup of groundwater contaminated with VOCs. The NoVOCs(TM) technology was ev...

  19. Mechanism of film formation during granules capsulation in fluidized bed

    OpenAIRE

    Ostroha, Ruslan; Yukhymenko, Mykola

    2013-01-01

    It is proposed to perform granules capsulation process in the device of fluidized bed. Analysis of different approaches to mathematical description of granules growth kinetics was made. Equation of size determination of received granules in the device is proposed including granules growth rate and changes of density of granules distribution according to sizes in film forming process.

  20. Noncontact optical measurement of lens capsule thickness ex vivo

    Science.gov (United States)

    Ziebarth, Noel M.; Manns, Fabrice; Uhlhorn, Stephen; Parel, Jean-Marie

    2004-07-01

    Purpose: To design a non-contact optical system to measure lens capsule thickness in cadaver eyes. Methods: The optical system uses a 670nm laser beam delivered to a single-mode fiber coupler. The output of the fiber coupler is focused onto the tissue using an aspheric lens (NA=0.68) mounted on a motorized translation stage. Light reflected from the sample is collected by the fiber coupler and sent to a silicon photodiode connected to a power meter. Peaks in the power signal are detected when the focal point of the aspheric lens coincides with the capsule boundaries. The capsule thickness is proportional to the distance between successive peaks. Anterior and posterior lens capsule thickness measurements were performed on 13 human, 10 monkey, and 34 New Zealand white rabbit lenses. The cadaver eyes were prepared for optical measurements by bonding a PMMA ring on the sclera. The posterior pole was sectioned, excess vitreous was removed, and the eye was placed on a Teflon slide. The cornea and iris were then sectioned. After the experiments, the lenses were excised, placed in 10% buffered formalin, and prepared for histology. Results: Central anterior lens capsule thickness was 9.4+/-2.9μm (human), 11.2+/-6.6μm (monkey), and 10.3+/-3.6μm (rabbit) optically and 14.9+/-1.6μm (human), 17.7+/-4.9μm (monkey), and 12.6+/-2.3μm (rabbit) histologically. The values for the central posterior capsule were 9.4+/-2.9μm (human), 6.6+/-2.5μm (monkey), and 7.9+/-2.3μm (rabbit) optically and 4.6+/-1.4μm (human), 4.5+/-1.2μm (monkey), and 5.7+/-1.7μm (rabbit) histologically. Conclusions: This study demonstrates that a non-contact optical system can successfully measure lens capsule thickness in cadaver eyes.

  1. Channa striatus capsules induces cytokine conversion in pulmonary tuberculosis patients

    Directory of Open Access Journals (Sweden)

    Novita Paliliewu

    2013-06-01

    Full Text Available Objective: This study aimed to investigate whether Channa striatus capsule induces sputum and cytokine conversion in pulmonary tuberculosis (TB patients. Methods: Randomized, placebo-controlled, double-blind pilot study was conducted to pulmonary TB patients who admitted to Department of Internal Medicine, Faculty of Medicine, University of Sam Ratulangi, Manado, North Sulawesi, Indonesia. A total of 36 pulmonary TB patients were randomly divided into two equal groups (n = 18 including one group received standart antituberculosis drugs plus Channa striatus capsule and another group received standart antituberculosis drugs plus placebo. Channa striatus capsule was given at a dose of 2 g each time, 3 times per day, for 12 weeks. The levels of tumor necrosis factor (TNF-α, interferon (IFN-γ, and interleukin (IL-10 were analyses using enzyme linked immunosorbent assay (ELISA method. Results: The rate of positive sputum smear decline was more pronounced in the Channa striatus group but did not reach statistically different value between groups. The levels of TNF-α, IFN-γ, and IL-10 were not significantly different in Channa striatus group compared to placebo group at baseline (week 0. But at week 12, the supplementation of Channa striatus capsule significantly decreased TNF-α, IFN-γ, and IL-10 levels compared to baseline. In placebo groups, there were no significant differences for IL-10 levels at week 12, but the levels of TNF-α and IFN-γ significantly decreased. Conclusion: Adjunctive supplementation of Channa striatus capsules accelerated the beneficial therapeutic effect of TB chemotherapy by improving cytokine response. [J Exp Integr Med 2013; 3(3.000: 237-242

  2. Solution Based Deposition of Polyimide Ablators for NIF Capsules

    Energy Technology Data Exchange (ETDEWEB)

    Cook, R

    2002-07-11

    Between June 1997 and March 2002 Luxel Corporation was contracted to explore the possibility of preparing NIF scale capsules with polyimide ablators using solution-based techniques. This work offered a potential alternative to a vapor deposition approach talking place at LLNL. The motivation for pursuing the solution-based approach was primarily two-fold. First, it was expected that much higher strength capsules (relative to vapor deposition) could be prepared since the solution precursors were known to produce high strength films. Second, in applying the ablator as a fluid it was expected that surface tension effects would lead to very smooth surfaces. These potential advantages were offset by expected difficulties, primary among them that the capsules would need to be levitated in some fashion (for example acoustically) during coating and processing, and that application of the coating uniformly to thicknesses of 150 pm on levitated capsules would be difficult. Because of the expected problems with the coupling of levitation and coating, most of the initial effort was to develop coating and processing techniques on stalk-mounted capsules. The program had some success. Using atomizer spray techniques in which application of {approx}5 {micro}m fluid coatings were alternated with heating to remove solvent resulted in up to 70 {micro}m thick coatings that were reasonably smooth at short wavelengths, and showed only about a 1 {micro}m thickness variation over long wavelengths. More controlled deposition with an inkjet devise was also developed. However difficult technical problems remained, and these problems coupled with the relative success of the vapor deposition approach led to the termination of the solution-based work in 2002. What follows is a compilation of the progress reports submitted by Luxel for this work which spanned a number of separate contracts. The reports are arranged chronologically, the last report in the collection has a modest summary of what

  3. An ultra-low-power image compressor for capsule endoscope

    Directory of Open Access Journals (Sweden)

    Weng Ping-Kuo

    2006-02-01

    Full Text Available Abstract Background Gastrointestinal (GI endoscopy has been popularly applied for the diagnosis of diseases of the alimentary canal including Crohn's Disease, Celiac disease and other malabsorption disorders, benign and malignant tumors of the small intestine, vascular disorders and medication related small bowel injury. The wireless capsule endoscope has been successfully utilized to diagnose diseases of the small intestine and alleviate the discomfort and pain of patients. However, the resolution of demosaicked image is still low, and some interesting spots may be unintentionally omitted. Especially, the images will be severely distorted when physicians zoom images in for detailed diagnosis. Increasing resolution may cause significant power consumption in RF transmitter; hence, image compression is necessary for saving the power dissipation of RF transmitter. To overcome this drawback, we have been developing a new capsule endoscope, called GICam. Methods We developed an ultra-low-power image compression processor for capsule endoscope or swallowable imaging capsules. In applications of capsule endoscopy, it is imperative to consider battery life/performance trade-offs. Applying state-of-the-art video compression techniques may significantly reduce the image bit rate by their high compression ratio, but they all require intensive computation and consume much battery power. There are many fast compression algorithms for reducing computation load; however, they may result in distortion of the original image, which is not good for use in the medical care. Thus, this paper will first simplify traditional video compression algorithms and propose a scalable compression architecture. Conclusion As the result, the developed video compressor only costs 31 K gates at 2 frames per second, consumes 14.92 mW, and reduces the video size by 75% at least.

  4. Capsule Development and Utilization for Material Irradiation Tests

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Bong Goo; Kang, Y. H.; Cho, M. S. (and others)

    2007-06-15

    The essential technology for an irradiation test of materials and nuclear fuel has been successively developed and utilized to meet the user's requirements in Phase I(July 21, 1997 to March 31, 2000). It enables irradiation tests to be performed for a non-fissile material under a temperature control(300{+-}10 .deg. C) in a He gas environment, and most of the irradiation tests for the internal and external users are able to be conducted effectively. The basic technology was established to irradiate a nuclear fuel, and a creep capsule was also developed to measure the creep property of a material during an irradiation test in HANARO in Phase II(April 1, 2000 to March 31, 2003). The development of a specific purpose capsule, essential technology for a re-irradiation of a nuclear fuel, advanced technology for an irradiation of materials and a nuclear fuel were performed in Phase III(April 1, 2003 to February 28, 2007). Therefore, the technology for an irradiation test was established to support the irradiation of materials and a nuclear fuel which is required for the National Nuclear R and D Programs. In addition, an improvement of the existing capsule design and fabrication technology, and the development of an instrumented capsule for a nuclear fuel and a specific purpose will be able to satisfy the user's requirements. In order to support the irradiation test of materials and a nuclear fuel for developing the next generation nuclear system, it is also necessary to continuously improve the design and fabrication technology of the existing capsule and the irradiation technology.

  5. Analysis of non-typeable Haemophilus influenzae in invasive disease reveals lack of the capsule locus.

    Science.gov (United States)

    Lâm, T-T; Claus, H; Frosch, M; Vogel, U

    2016-01-01

    Among invasive Haemophilus influenzae, unencapsulated strains have largely surpassed the previously predominant serotype b (Hib) because of Hib vaccination. Isolates without the genomic capsule (cap) locus are designated non-typeable H. influenzae (NTHi). They are different from capsule-deficient variants that show deletion of the capsule transport gene bexA within the cap locus. The frequency of capsule-deficient variants in invasive disease is unknown. We analysed 783 unencapsulated invasive isolates collected over 5 years in Germany and found no single capsule-deficient isolate. Invasive unencapsulated strains in Germany were exclusively NTHi. A negative serotyping result by slide agglutination was therefore highly predictive for NTHi.

  6. Species in the Cryptococcus gattii Complex Differ in Capsule and Cell Size following Growth under Capsule-Inducing Conditions

    Science.gov (United States)

    Fernandes, Kenya E.; Dwyer, Christine; Campbell, Leona T.

    2016-01-01

    ABSTRACT Cryptococcus gattii causes invasive fungal infections that have been increasing in incidence and global distribution in recent years. The major molecular genotypes of C. gattii that were previously classified as VGI to VGIV have recently been described as four new species: C. gattii (VGI), C. deuterogattii (VGII), C. bacillisporus (VGIII), and C. tetragattii (VGIV). The main driver for their classification has been phylogeny, and phenotypic diversity has not yet been extensively characterized. This study examines variation in attributes related to virulence and pathogenicity, including capsule thickness, cell size, tolerance to temperature, oxidative and osmotic stress, and cell wall integrity. A capsule induction agar using diluted Sabouraud medium revealed significant differences in capsule and cell size across the C. gattii species complex and produced irregularly shaped elongated cells in a number of strains. C. gattii/VGI strains possessed the largest capsules of all species but had smaller cells, while C. deuterogattii/VGII strains possessed the largest cells of all species but had smaller capsules. Overall thermotolerance was highest in C. deuterogattii/VGII strains, while a number of C. bacillisporus/VGIII, and C. tetragattii/VGIV strains had substantially reduced growth at 37°C. There was no significant difference among species in their tolerances to oxidative or osmotic stresses, and there was no evidence for defects in cell wall integrity in strains producing irregular cells. These data support the division of the C. gattii species complex into distinctly identified species and suggest underlying reasons for their differences in virulence, epidemiology, and host preference. IMPORTANCE Infections with the fungal pathogen Cryptococcus gattii have been increasing in recent years. Recently, four different species have been described within C. gattii, which correspond to four previously known molecular genotypes (VGI to VGIV). Examining

  7. Buckling and its effect on the confined flow of a model capsule suspension

    Science.gov (United States)

    Bryngelson, Spencer; Freund, Jonathan

    2015-11-01

    The rheology of confined flowing suspensions, such as blood, depend upon the dynamics of the components, which can be particularly rich when they are elastic capsules. Using boundary integral methods, we simulate a two-dimensional model channel through which flows a dense suspension of fluid-filled capsules. A parameter of principal interest is the equilibrium membrane perimeter, which ranges from round capsules to capsules with an elongated dog-bone-like equilibrium shape. It is shown that the minimum effective viscosity occurs for capsules with a biconcave equilibrium shape, similar to that of a red blood cell. The rheological behavior changes significantly over this range; transitions are linked to specific changes in the capsule dynamics. Most noteworthy is an abrupt change in behavior when capsules transition to a dog-bone-like equilibrium shape, which correlates with the onset of capsule buckling. The buckled capsules have a more varied orientation and make significant rotational (rotlet) contributions to the capsule-capsule interactions. Supported under NSF Grant No. CBET 13-36972.

  8. Fabrication of Non-instrumented capsule for DUPIC simulated fuel irradiation test in HANARO

    Energy Technology Data Exchange (ETDEWEB)

    Kim, B.G.; Kang, Y.H.; Park, S.J.; Shin, Y.T. [Korea Atomic Energy Research Institute, Taejon (Korea)

    1999-10-01

    In order to develope DUPIC nuclear fuel, the irradiation test for simulated DUPIC fuel was planed using a non-instrumented capsule in HANARO. Because DUPIC fuel is highly radioactive material the non-instrumented capsule for an irradiation test of simulated DUPIC fuel in HANARO was designed to remotely assemble and disassemble in hot cell. And then, according to the design requirements the non-instrumented DUPIC capsule was successfully manufactured. Also, the manufacturing technologies of the non-instrumented capsule for irradiating the nuclear fuel in HANARO were established, and the basic technology for the development of the instrumented capsule technology was accumulated. This report describes the manufacturing of the non-instrumented capsule for simulated DUPIC fuel. And, this report will be based to develope the instrumented capsule, which will be utilized to irradiate the nuclear fuel in HANARO. 26 refs., 4 figs. (Author)

  9. Characterization of Bacterial Polysaccharide Capsules and Detection in the Presence of Deliquescent Water by Atomic Force Microscopy

    OpenAIRE

    Su, Hai-Nan; Chen, Zhi-Hua; Liu, Sheng-Bo; Qiao, Li-Ping; Chen, Xiu-Lan; He, Hai-Lun; Zhao, Xian; Zhou, Bai-Cheng; Zhang, Yu-Zhong

    2012-01-01

    We detected polysaccharide capsules from Zunongwangia profunda SM-A87 with atomic force microscopy (AFM). The molecular organization of the capsules at the single-polysaccharide-chain level was reported. Furthermore, we found that with ScanAsyst mode the polysaccharide capsules could be detected even in the presence of deliquescent water covering the capsule.

  10. Capsule enteroscopy and radiology of the small intestine

    Energy Technology Data Exchange (ETDEWEB)

    Fork, Frans-Thomas [Malmoe University Hospital, Department of Diagnostic Radiology, Malmoe (Sweden); Aabakken, Lars [Rikshospitalet University Hospital, Department of Gastroenterology, Oslo (Norway)

    2007-12-15

    In a very few years, the video capsule for small bowel enteroscopy has gained widespread clinical acceptance. It is readily ingested, disposable, and allows for a complete, low-invasive endoscopic examination of the entire mucosa of the small bowel. It is a patient-friendly method and a first-line procedure in the difficult evaluation of obscure gastrointestinal bleeding. It has the highest proven figure of diagnostic sensitivity for detecting lesions of the mucosa, irrespective of aetiology. The limitations of capsule endoscopy include difficulty in localising mucosal lesions anatomically and its restricted use in patients with dysphagia, strictures or motor dysfunction. Strictures, transmural and extra-mural lesions in patients with small bowel Crohn's disease are evaluated by MRI- enterography and CT-enterography. (orig.)

  11. Polyp Detection and Segmentation from Video Capsule Endoscopy: A Review

    Directory of Open Access Journals (Sweden)

    V. B. Surya Prasath

    2016-12-01

    Full Text Available Video capsule endoscopy (VCE is used widely nowadays for visualizing the gastrointestinal (GI tract. Capsule endoscopy exams are prescribed usually as an additional monitoring mechanism and can help in identifying polyps, bleeding, etc. To analyze the large scale video data produced by VCE exams, automatic image processing, computer vision, and learning algorithms are required. Recently, automatic polyp detection algorithms have been proposed with various degrees of success. Though polyp detection in colonoscopy and other traditional endoscopy procedure based images is becoming a mature field, due to its unique imaging characteristics, detecting polyps automatically in VCE is a hard problem. We review different polyp detection approaches for VCE imagery and provide systematic analysis with challenges faced by standard image processing and computer vision methods.

  12. [A newly-developed capsule endoscope in Japan].

    Science.gov (United States)

    Ogata, Haruhiko

    2008-07-01

    A new video capsule endoscope (VCE) developed by Olympus Medical Systems provides upgrade resolution, depth of the field, and brightness of the image, by improving the optical system, contained with the new function to adjust the level of lighting automatically coordinate with the brightness around, and the original handy displayed real-time viewer. Clinical trial using this capsule demonstrated the significantly higher diagnostic yield compared with barium contrast radiography of small bowel, especially for vascular involvement. Real-time viewer could be useful for detecting the gastric transit abnormality as well as for increasing the likelihood of a complete small-bowel examination with metoclopramide administration. Together with balloon-equipped enteroscopy, VCE is a new device which contributes to the diagnosis and the treatment of the small bowel lesion.

  13. Plastic ablator ignition capsule design for the National Ignition Facility

    Energy Technology Data Exchange (ETDEWEB)

    Clark, D S; Haan, S W; Hammel, B A; Salmonson, J D; Callahan, D A; Town, R P

    2009-12-01

    The National Ignition Campaign, tasked with designing and fielding targets for fusion ignition experiments on the National Ignition Facility (NIF), has carried forward three complementary target designs for the past several years: a beryllium ablator design, a plastic ablator design, and a high-density carbon or synthetic diamond design. This paper describes current simulations and design optimization to develop the plastic ablator capsule design as a candidate for the first ignition attempt on NIF. The trade-offs in capsule scale and laser energy that must be made to achieve a comparable ignition probability to that with beryllium are emphasized. Large numbers of 1-D simulations, meant to assess the statistical behavior of the target design, as well as 2-D simulations to assess the target's susceptibility to Rayleigh-Taylor growth are presented.

  14. A microfluidic device to sort capsules by deformability

    CERN Document Server

    Zhu, L; Mitra, Dhrubaditya; Brandt, Luca

    2014-01-01

    Guided by extensive numerical simulations, we propose a microfluidic device that can sort elastic capsules by their deformability. The device consists of a duct embedded with a semi-cylindrical obstacle, and a diffuser which further enhances the sorting capability. We demonstrate that the device can operate reasonably well under changes in the initial position of the the capsule. The efficiency of the device remains essentially unaltered under small changes of the obstacle shape (from semi-circular to semi-elliptic cross-section). Confinement along the direction perpendicular to the plane of the device increases its efficiency. This work is the first numerical study of cell sorting by a realistic microfluidic device.

  15. Arthroscopic capsule reconstruction in the hip using iliotibial band allograft.

    Science.gov (United States)

    Trindade, Christiano A C; Sawyer, Gregory A; Fukui, Kiyokazu; Briggs, Karen K; Philippon, Marc J

    2015-02-01

    The hip capsule has been identified as an important static stabilizer of the hip joint. Despite the intrinsic bony stability of the hip socket, the capsule plays a key role in hip stability, particularly at the extremes of motion, and the iliofemoral ligament is the most important stabilizer in extension and external rotation. Patients who do not undergo capsular closure or plication may continue to complain of hip pain and dysfunction postoperatively, likely because of microinstability or muscle invagination into the capsular defect, and high-resolution magnetic resonance imaging or magnetic resonance arthrography will identify the capsular defect. Seen primarily in the revision setting, capsular defects can cause recurrent stress at the chondrolabral junction. An attempt at secondary closure can be challenging because of capsular limb adherence to the surrounding soft tissues. Therefore reconstruction may be the only possible surgical solution for this problem. We describe our new surgical technique for arthroscopic hip capsular reconstruction using iliotibial band allograft.

  16. Compounding of slow-release niacinamide capsules: feasibility and characterization.

    Science.gov (United States)

    Radojkovic, Branko; Milić, Jela; Calija, Bojan

    2012-01-01

    The purpose of this study was to assess the feasibility of extemporaneous compounding of slow-release oral dosage form of niacinamide and to evaluate its release kinetics. The model formulation (preparation) was developed in the form of powder-filled hard gelatin capsules. Two slow-release preparations with different ratios of hypromellose have been prepared and evaluated in comparison with an immediate-release preparation. The dissolution tests were performed as per United States Pharmacopoeia requirements: Type I Apparatus, over 7 hours. Both slow-release preparations, containing 40% and 60% v/v hypromellose, respectively, have showed slow release kinetics. The dissolution profiles were significantly different, with similarity factor f2niacinamide capsules can be successfully compounded using hypromellose as a sole release rate modifier, and that the release mechanism is comparable to hydrophilic polymer matrix-based systems.

  17. Adhesive capsulitis of the wrist. Diagnosis and treatment.

    Science.gov (United States)

    Hanson, E C; Wood, V E; Thiel, A E; Maloney, M D; Sauser, D D

    1988-09-01

    Adhesive capsulitis occurs as a pathologic entity in the shoulder, hip, and ankle joints. Thickening and contracture of the wrist joint capsule were demonstrated on arthrograms performed on ten patients ranging in age from 20 to 82 years. The patients had pain and limited range of motion in the wrist. The findings included: (1) resistance to the injection of smaller than normal volumes of contrast material, (2) obliteration of recesses, and (3) extravasation of the contrast agent along the needle tract. Closed manipulation under general anesthesia of the wrist on four patients resulted in some improvement in range of motion. A distal ulna fracture in one older patient occurred as a complication of manipulation. Careful technique and judicious patient selection are of paramount importance.

  18. Modeling performance of a two-dimensional capsule in a microchannel flow: long-term lateral migration.

    Science.gov (United States)

    Li, Hua; Ma, Gang

    2010-08-01

    The long-term lateral migration of a two-dimensional elastic capsule in a microchannel is studied numerically in this paper. The numerical method combines a finite volume technique for solving the fluid problem with a front tracking technique for capturing and tracking the capsule membrane. The capsule is modeled as a liquid medium enclosed by a thin membrane which has linear elastic properties. The capsule, whose initial shape is circle and which starts from a near-center position or a near-wall position, experiences tilting and membrane tank-treading, and migrates laterally when moving along the surrounding flow. The lateral migration demonstrates the existence of lift effect of surrounding flow on moving capsule. Before capsule approaches to the microchannel centerline closely, lower membrane dilation modulus and lower viscosity ratio tend to result in faster lateral migration. The initial position also influences the performance behavior of capsule, despite the lateral migration of capsule is a quasisteady process. Small difference in capsule behavior when capsule is not near to the microchannel centerline might lead to significant difference in capsule behavior when capsule approaches closely to the centerline. When capsules are near to microchannel wall, the effect of the wall on capsule behavior might dominate, leading to relatively faster lateral migration. When capsules are not far from microchannel centerline, the effect of the nonlinearity of Poiseuille flow might dominate, resulting in relatively slower lateral movement. When capsules are located closely to the centerline, they behave differently, where the reason still remains poorly understood and it will be one of our future studies. The comparison between the capsule behavior from the present simulation and that by the migration law proposed by Coupier [Phys. Fluids 20, 111702 (2008)] shows that the behavioral agreement for near-wall capsule is better than that for near-center capsule, and the best

  19. An Innovative Wireless Endoscopic Capsule With Spherical Shape.

    Science.gov (United States)

    Fontana, Rossella; Mulana, Francesca; Cavallotti, Carmen; Tortora, Giuseppe; Vigliar, Mario; Vatteroni, Monica; Menciassi, Arianna

    2017-02-01

    This paper aims to contribute to the advancement of the Wireless Capsule Endoscopy (WCE) field for ColoRectal Cancer (CRC) screening, by developing all electronic circuits to build an innovative wireless endoscopic capsule with a spherical shape, conceived to reduce the friction during its locomotion and thus improving patient's acceptability. The proposed capsule embeds an image sensor with optics and Light Emitting Diodes (LEDs), a control unit with a telemetry module, an actuation system, a battery with a smart recharging circuit able to recharge in 20 minutes, a smart power-on circuit and a localization module. Everything is devised to fit in a small spherical shape with a diameter of 26 mm and a weight of 12.70 g. The authors present a description of the sub-modules involved in the capsule development, together with the firmware and hardware integration. In order to reduce the bandwidth for matching the specifications of the target commercial telemetry, the firmware interfacing of a custom encoder was performed, which is able to compress the incoming images with a negligible loss of information and occupying a number of Look Up-Tables (LUTs) less than 1780. As a preliminary work, a versatile Field Programmable Gate Arrays (FPGA) based demo-board system has been developed in order to test and optimize the functionalities and the performance of the single sub-modules and wireless vision chain system. This work allows to demonstrate the feasibility of a complex biomedical system, with severe constraints by highlighting the necessity to enhance the frame rate in the future.

  20. 3D Numerical simulations of vesicle and inextensible capsule dynamics

    OpenAIRE

    2014-01-01

    published in Journal of Computational Physics; International audience; Vesicles are locally-inextensible fluid membranes while inextensible capsules are in addition endowed with in-plane shear elasticity mimicking the cytoskeleton of red blood cells (RBCs). Boundary integral (BI) methods based on the Green's function techniques are used to describe their dynamics, that falls into the category of highly nonlinear and nonlocal dynamics. Numerical solutions raise several obstacles and challenges...

  1. Small bowel capsule endoscopy in 2007: Indications, risks and limitations

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Capsule endoscopy has revoluzionized the study of the small bowel by providing a reliable method to evaluate,endoscopically, the entire small bowel. In the last six years several papers have been published exploring the possible role of this examination in different clinical conditions. At the present time capsule endoscopy is generally recommended as a third examination, after negative bidirectional endoscopy, in patients with obscure gastrointestinal bleeding. A growing body of evidence suggests also an important role for this examination in other clinical conditions such as Crohn's disease, celiac disease, small bowel polyposis syndromes or small bowel tumors. The main complication of this examination is the retention of the device at the site of a previously unknown small bowel stricture. However there are also some other open issues mainly due to technical limitations of this tool (which is not driven from remote control, is unable to take biopsies, to insufflate air, to suck fluids or debris and sometimes to correctly size and locate lesions).The recently developed double balloon enteroscope, owing to its capability to explore a large part of the small bowel and to take targeted biopsies, although being invasive and time consuming,can overcome some limitations of capsule endoscopy.At the present time, in the majority of clinical conditions (i.e. obscure GI bleeding), the winning strategy seems to be to couple these two techniques to explore the small bowel in a painless, safe and complete way (with capsule endoscopy) and to define and treat the lesions identified (with double balloon enteroscopy).

  2. Video capsule endoscopy and the hidden gastrointestinal diseases

    Directory of Open Access Journals (Sweden)

    Helmy Ahmed

    2006-01-01

    Full Text Available Video capsule endoscopy (VCE has recently been introduced to fill the gap between examinations of the upper and lower gastrointestinal tract, mainly to examine the small bowel (SB for sources of obscure bleeding in addition to many other indications. VCE represents a minute endoscope, embedded in a swallowable capsule that is propelled by peristalsis and achieves the journey to the right colon in 5-8 hours. Images captured by the capsule are recorded on a hard drive attached to the patient′s belt. Many studies have recently shown that the diagnostic yield of VCE is superior to that of push enteroscopy. This mini-review contains information on the technical aspects, indications, safety and tolerance of VCE. It is well known that radiological investigations of the small bowel (SB have a limited diagnostic yield, are relatively invasive, and often lead to late discovery of diseases, especially malignancy and profuse bleeding, at a worse stage. Also, push enteroscopy is limited by the depth of the insertion of the instrument to the proximal jejunum and, in the retrograde, to the last 50-80 cm of the terminal ileum, with an ability to visualize the entire SB only in 10-70% of cases. Introduction of video capsule endoscopy (VCE is therefore regarded a significant advance in investigating intestinal diseases, and closes the gap in evaluating the SB, "the black box" of endoscopy(1. This mini-review describes the current indications of VCE and the prerequisites for accurate examination, and briefly discusses its tolerance and safety.

  3. Acetylene bubble-powered autonomous capsules: towards in situ fuel.

    Science.gov (United States)

    Moo, James Guo Sheng; Wang, Hong; Pumera, Martin

    2014-12-28

    A fuel-free autonomous self-propelled motor is illustrated. The motor is powered by the chemistry of calcium carbide and utilising water as a co-reactant, through a polymer encapsulation strategy. Expulsion of acetylene bubbles powers the capsule motor. This is an important step, going beyond the toxic hydrogen peroxide fuel used normally, to find alternative propellants for self-propelled machines.

  4. The development and application of wireless capsule endoscopy.

    Science.gov (United States)

    Glukhovsky, A; Jacob, H

    2004-06-01

    The introduction of the Video Capsule Endoscope (VCE) by Given Imaging Ltd. (Yoqneam, Israel) in 2001, and its subsequent approval by the FDA as a first line tool in the detection of abnormalities of the small bowel, is indicative of the rapid acceptance of capsule endoscopy by the practicing gastroenterological community. An extensive clinical trials program consistently revealed a high diagnostic yield of the VCE when compared to other diagnostic modalities of the small intestine. The capsule endoscope contains a miniature color video camera, illumination sources, lens, transmitter/controller, antenna, and a power source. It is small enough to easily swallow (11 x 26 mm), and it is propelled through the gastrointestinal (GI) tract by peristalsis. Its development was enabled by a series of technological breakthroughs that occurred at the close of the 20th century. The VCE is one of the most exciting examples of the recent trend for minimally invasive autonomous medical tools in diagnostic, monitoring, and therapeutic applications. Expanding applications of the VCE to additional parts of the GI tract, adding physiological sensors, and--in the more remote future--addition of therapeutic capabilities will likely occur as this new branch of endoscopy develops.

  5. High-Density Carbon (HDC) Ablator for NIC Ignition Capsules

    Science.gov (United States)

    Ho, D.; Haan, S.; Salmonson, J.; Milovich, J.; Callahan, D.

    2012-10-01

    HDC ablators show high performance based on simulations, despite the fact that the shorter pulses for HDC capsules result in higher M-band radiation compared to that for plastic capsules. HDC capsules have good 1-D performance because HDC has relatively high density (3.5 g/cc), which results in a thinner ablator that absorbs more radiation. HDC ablators have good 2-D performance because the ablator surface is more than an order-of-magnitude smoother than Be or plastic ablators. Refreeze of the ablator near the fuel region can be avoided by appropriate dopant placement. Here we present two HDC ignition designs doped with W and Si. For the design with maximum W concentration of 1.0 at% (and respectively with maximum Si concentration of 2.0 at%): peak velocity = 0.395 (0.397) mm/ns, mass weighted fuel entropy = 0.463 (0.469) kJ/mg/eV, peak core hydrodynamic stagnation pressure = 690 (780) Gbar, and yield = 17.3 (20.2) MJ. 2-D simulations show that yield is close to 80% YoC even with 2.5x of nominal surface roughness on all surfaces. The clean fuel fraction is about 75% at peak velocity. Doping HDC with the required concentration of W and Si is in progress. A first undoped HDC Symcap is scheduled to be fielded later this year.

  6. Lateral migration of a capsule in a parabolic flow.

    Science.gov (United States)

    Nix, S; Imai, Y; Ishikawa, T

    2016-07-26

    Red blood cells migrate to the center of the blood vessel in a process called axial migration, while other blood cells, such as white blood cells and platelets, are disproportionately found near the blood vessel wall. However, much is still unknown concerning the lateral migration of cells in the blood; the specific effect of hydrodynamic factors such as a wall or a shear gradient is still unclear. In this study, we investigate the lateral migration of a capsule using the boundary integral method, in order to compute exactly an infinite computational domain for an unbounded parabolic flow and a semi-infinite computational domain for a near-wall parabolic flow in the limit of Stokes flow. We show that the capsule lift velocity in an unbounded parabolic flow is linear with respect to the shear gradient, while the lift velocity in a near-wall parabolic flow is dependent on the distance to the wall. Then, using these relations, we give an estimation of the relative effect of the shear gradient as a function of channel width and distance between the capsule and the wall. This estimation can be used to determine cases in which the effect of the shear gradient or wall can be neglected; for example, the formation of the cell-free layer in blood vessels is determined to be unaffected by the magnitude of the shear gradient.

  7. Investigation of fMRI activation in the internal capsule

    Directory of Open Access Journals (Sweden)

    Brewer Kimberley D

    2011-06-01

    Full Text Available Abstract Background Functional magnetic resonance imaging (fMRI in white matter has long been considered controversial. Recently, this viewpoint has been challenged by an emerging body of evidence demonstrating white matter activation in the corpus callosum. The current study aimed to determine whether white matter activation could be detected outside of the corpus callosum, in the internal capsule. Data were acquired from a 4 T MRI using a specialized asymmetric spin echo spiral sequence. A motor task was selected to elicit activation in the posterior limb of the internal capsule. Results White matter fMRI activation was examined at the individual and group levels. Analyses revealed that activation was present in the posterior limb of the internal capsule in 80% of participants. These results provide further support for white matter fMRI activation. Conclusions The ability to visualize functionally active tracts has strong implications for the basic scientific study of connectivity and the clinical assessment of white matter disease.

  8. Inflated Sporopollenin Exine Capsules Obtained from Thin-Walled Pollen

    Science.gov (United States)

    Park, Jae Hyeon; Seo, Jeongeun; Jackman, Joshua A.; Cho, Nam-Joon

    2016-06-01

    Sporopollenin is a physically robust and chemically resilient biopolymer that comprises the outermost layer of pollen walls and is the first line of defense against harsh environmental conditions. The unique physicochemical properties of sporopollenin increasingly motivate the extraction of sporopollenin exine capsules (SECs) from pollen walls as a renewable source of organic microcapsules for encapsulation applications. Despite the wide range of different pollen species with varying sizes and wall thicknesses, faithful extraction of pollen-mimetic SECs has been limited to thick-walled pollen capsules with rigid mechanical properties. There is an unmet need to develop methods for producing SECs from thin-walled pollen capsules which constitute a large fraction of all pollen species and have attractive materials properties such as greater aerosol dispersion. Herein, we report the first successful extraction of inflated SEC microcapsules from a thin-walled pollen species (Zea mays), thereby overcoming traditional challenges with mechanical stability and loss of microstructure. Morphological and compositional characterization of the SECs obtained by the newly developed extraction protocol confirms successful protein removal along with preservation of nanoscale architectural features. Looking forward, there is excellent potential to apply similar strategies across a wide range of unexplored thin-walled pollen species.

  9. Modeling of NIF Wetted-Foam Capsule Experiments

    Science.gov (United States)

    Peterson, Robert; Olson, Richard; Kline, John

    2015-11-01

    Wetting of a foam with liquid DT or DD in an ICF capsule provides a mechanism of directly controlling the convergence ratio of the implosion. The density of the DD or DT vapor in the central void in the CH foam is set by the temperature of the liquid fuel, so the convergence ratio is easily adjustable. The capsule is driven by a two step laser pulse on NIF. The ablator is made of high density carbon in these experiments, but it could be beryllium. The experiments will test how well the modeling computer codes agree with experiment as the convergence ratio increases. It is possible that has the convergence ratio increases, a point will be reached were the modeling no longer agree with experiment. We wish to find this limit. In the presentation we will present computer model simulations in 1-D of the performance of NIF wetted-foam capsules, where the vapor density, the ablator type, and the choice of fuel (DD or DT) are varied.

  10. Comparison of esophageal capsule endoscopy and esophagogastroduodenoscopy for diagnosis of esophageal varices

    Institute of Scientific and Technical Information of China (English)

    Catherine T Frenette; John G Kuldau; Donald J Hillebrand; Jill Lane; Paul J Pockros

    2008-01-01

    AIM: To investigate the utility of esophageal capsule endoscopy in the diagnosis and grading of esophageal varices.METHODS: Cirrhotic patients who were undergo-ing esophagogastroduodenoscopy (EGD) for variceal screening or surveillance underwent capsule endos-copy. Two separate blinded investigators read each capsule endoscopy for the following results: variceal grade, need for treatment with variceal banding or prophylaxis with beta-blocker therapy, degree of portal hypertensive gastropathy, and gastric varices.RESULTS: Fifty patients underwent both capsule and EGD. Forty-eight patients had both procedures on the same day, and 2 patients had capsule endoscopy within 72 h of EGD. The accuracy of capsule endos-copy to decide on the need for prophylaxis was 74%,with sensitivity of 63% and specificity of 82%. Inter-rater agreement was moderate (kappa = 0.56). Agree-ment between EGD and capsule endoscopy on grade of varices was 0.53 (moderate). Inter-rater reliability was good (kappa = 0.77). In diagnosis of portal hyper.tensive gastropathy, accuracy was 57%, with sensitiv-ity of 96% and specificity of 17%. Two patients had gastric varices seen on EGD, one of which was seen on capsule endoscopy. There were no complications from capsule endoscopy.CONCLUSION: We conclude that capsule endoscopy has a limited role in deciding which patients would benefit from EGD with banding or beta-blocker thera-py. More data is needed to assess accuracy for staging esophageal varices, PHG, and the detection of gastric varices.

  11. The roles of Tenascin C and Fibronectin 1 in adhesive capsulitis: a pilot gene expression study

    Directory of Open Access Journals (Sweden)

    Carina Cohen

    Full Text Available OBJECTIVES: We evaluated mRNA expression levels of genes that encode TGF-β1; the TGF-β1 receptor; the collagen-modifying enzymes LOX, PLOD1, and PLOD2; and the extracellular matrix proteins COMP, FN1, TNC and TNXB in synovial/capsule specimens from patients with idiopathic adhesive capsulitis. Possible associations between the measured mRNA levels and clinical parameters were also investigated. METHODS: We obtained glenohumeral joint synovium/capsule specimens from 9 patients with idiopathic adhesive capsulitis who had not shown improvement in symptoms after 5 months of physiotherapy. Adhesive capsulitis was confirmed in all patients by magnetic resonance imaging. We also obtained specimens from 8 control patients who had underwent surgery for acute acromioclavicular joint dislocation and who had radiological indication of glenohumeral capsule alteration based on arthroscopic evaluation. mRNA expression in the synovium/capsule specimens was analyzed by quantitative reverse transcription PCR. The B2M and HPRT1 genes were used as references to normalize target gene expression in the shoulder tissue samples. RESULTS: The synovium/capsule samples from the patients with adhesive capsulitis had significantly higher TNC and FN1 expression than those from the controls. Additionally, symptom duration directly correlated with expression of TGFβ1 receptor I. CONCLUSION: Elevated levels of TNC and FN1 expression may be a marker of capsule injury. Upregulation of TGFβ1 receptor I seems to be dependent on symptom duration; therefore, TGFβ signaling may be involved in adhesive capsulitis. As such, TNC, FN1 and TGFβ1 receptor I may also play roles in adhesive capsulitis by contributing to capsule inflammation and fibrosis.

  12. The roles of Tenascin C and Fibronectin 1 in adhesive capsulitis: a pilot gene expression study

    Science.gov (United States)

    Cohen, Carina; Leal, Mariana Ferreira; Belangero, Paulo Santoro; Figueiredo, Eduardo Antônio; Smith, Marília Cardoso; Andreoli, Carlos Vicente; de Castro Pochini, Alberto; Cohen, Moises; Ejnisman, Benno; Faloppa, Flávio

    2016-01-01

    OBJECTIVES: We evaluated mRNA expression levels of genes that encode TGF-β1; the TGF-β1 receptor; the collagen-modifying enzymes LOX, PLOD1, and PLOD2; and the extracellular matrix proteins COMP, FN1, TNC and TNXB in synovial/capsule specimens from patients with idiopathic adhesive capsulitis. Possible associations between the measured mRNA levels and clinical parameters were also investigated. METHODS: We obtained glenohumeral joint synovium/capsule specimens from 9 patients with idiopathic adhesive capsulitis who had not shown improvement in symptoms after 5 months of physiotherapy. Adhesive capsulitis was confirmed in all patients by magnetic resonance imaging. We also obtained specimens from 8 control patients who had underwent surgery for acute acromioclavicular joint dislocation and who had radiological indication of glenohumeral capsule alteration based on arthroscopic evaluation. mRNA expression in the synovium/capsule specimens was analyzed by quantitative reverse transcription PCR. The B2M and HPRT1 genes were used as references to normalize target gene expression in the shoulder tissue samples. RESULTS: The synovium/capsule samples from the patients with adhesive capsulitis had significantly higher TNC and FN1 expression than those from the controls. Additionally, symptom duration directly correlated with expression of TGFβ1 receptor I. CONCLUSION: Elevated levels of TNC and FN1 expression may be a marker of capsule injury. Upregulation of TGFβ1 receptor I seems to be dependent on symptom duration; therefore, TGFβ signaling may be involved in adhesive capsulitis. As such, TNC, FN1 and TGFβ1 receptor I may also play roles in adhesive capsulitis by contributing to capsule inflammation and fibrosis. PMID:27438566

  13. Hexameric Capsules Studied by Magic Angle Spinning Solid-State NMR Spectroscopy: Identifying Solvent Molecules in Pyrogallol[4]arene Capsules.

    Science.gov (United States)

    Avram, Liat; Goldbourt, Amir; Cohen, Yoram

    2016-01-18

    Powders of pyrogallol[4]arene hexamers were produced by evaporation from organic solvents and were studied, for the first time, by magic angle spinning solid-state NMR (MAS ssNMR). Evaporation selectively removed non-encapsulated solvent molecules leaving stable hexameric capsules encapsulating solvent molecules. After exposure of the powder to solvent vapors, (1)H/(13)C heteronuclear correlation MAS ssNMR experiments were used to assign the signals of the external and encapsulated solvent molecules. The formed capsules were stable for months and the process of solvent encapsulation was reversible. According to the ssNMR experiments, the encapsulated solvent molecules occupy different sites and those sites differ in their mobility. The presented approach paves the way for studying guest exchange, guest affinity, and gas storage in hexamers of this type in the solid state.

  14. Structure of capsule around acanthocephalan Corynosoma strumosum from uncommon paratenic hosts-lizards of two species.

    Science.gov (United States)

    Skorobrechova, Ekaterina M; Nikishin, Vladimir P; Lisitsyna, Olga I

    2012-01-01

    Micromorphology and ultrastructure of capsule forming around acanthocephalan Corynosoma strumosum in uncommon paratenic hosts-lizards Lacerta agilis and Lacerta viridis-have been studied. Experimental infestation of the lizards by acanthocephalans obtained from naturally infested sea fishes showed that only small amount of parasites occurred in the intestine of the host was able to migrate into body cavity and to be encapsulated. Micromorphology of capsules of different ages from different species of lizards and micromorphology and ultrastructure of capsules at the age of 1.5 and 10 days appeared to be similar. In the capsule's structure cells of inflammatory rank were prevailing: mononuclear and multinuclear macrophages, eosinophils, and basophils. Fibroblasts were not numerous and were located only in the outer part of a capsule; exocellular collagen fibers were absent. Inflammatory character of capsule confirms the idea that lizards are unsuitable paratenic hosts for corynosomes.

  15. Effects of Toutongning capsule on enkephalin expression in a rat migraine headache model

    Institute of Scientific and Technical Information of China (English)

    Gang Yao; Yuhong Man; Jingjing Qi; Tingmin Yu; Dihui Ma

    2011-01-01

    Toutongning capsule is used for the treatment of migraine headaches, and has yielded therapeutically beneficial effects. However, whether Toutongning capsule exerts its effects via endogenous opioid peptides remains poorly understood. This study investigated the effects of Toutongning capsule on enkephalin expression in the midbrain of rats with nitroglycerin-induced migraine headache at the mRNA and protein levels. Results confirmed that proenkephalin mRNA levels were significantly upregulated following treatment with Toutongning capsule. The numbers of methionine-enkephalin and leucine-enkephalin-positive cells were significantly greater in the migraine headache rats following treatment with Toutongning capsule compared with the model group. Taken together, these results show that Toutongning capsule exerts potentially beneficial effects by promoting enkephalin expression in nitroglycerin-induced migraine headache rats.

  16. Shuganjieyu capsule increases neurotrophic factor expression in a rat model of depression

    Institute of Scientific and Technical Information of China (English)

    Jinhua Fu; Yingjin Zhang; Renrong Wu; Yingjun Zheng; Xianghui Zhang; Mei Yang; Jingping Zhao; Yong Liu

    2014-01-01

    Shuganjieyu capsule has been approved for clinical treatment by the State Food and Drug Ad-ministration of China since 2008. In the clinic, Shuganjieyu capsule is often used to treat mild to moderate depression. In the rat model of depression established in this study, Shuganjieyu capsule was administered intragastrically daily before stress. Behavioral results conifrmed that depressive symptoms lessened after treatment with high-dose (150 mg/kg) Shuganjieyu capsule. Immunohistochemistry results showed that high-dose Shuganjieyu capsule signiifcantly increased phosphorylation levels of phosphorylation cyclic adenosine monophosphate response element binding protein and brain-derived neurotrophic factor expression in the medial prefrontal cortex and hippocampal CA3 area. Overall, our results suggest that in rats, Shuganjieyu capsule effec-tively reverses depressive-like behaviors by increasing expression levels of neurotrophic factors in the brain.

  17. The Antiphagocytic Activity of SeM of Streptococcus equi Requires Capsule.

    Science.gov (United States)

    Timoney, John F; Suther, Pranav; Velineni, Sridhar; Artiushin, Sergey C

    2014-01-01

    Resistance to phagocytosis is a crucial virulence property of Streptococcus equi (Streptococcus equi subsp. equi; Se), the cause of equine strangles. The contribution and interdependence of capsule and SeM to killing in equine blood and neutrophils were investigated in naturally occurring strains of Se. Strains CF32, SF463 were capsule and SeM positive, strains Lex90, Lex93 were capsule negative and SeM positive and strains Se19, Se1-8 were capsule positive and SeM deficient. Phagocytosis and killing of Se19, Se1-8, Lex90 and Lex93 in equine blood and by neutrophils suspended in serum were significantly (P ≤ 0.02) greater compared to CF32 and SF463. The results indicate capsule and SeM are both required for resistance to phagocytosis and killing and that the anti-phagocytic property of SeM is greatly reduced in the absence of capsule.

  18. Is there a role for colon capsule endoscopy beyond colorectal cancer screening? A literature review.

    Science.gov (United States)

    Triantafyllou, Konstantinos; Beintaris, Iosif; Dimitriadis, George D

    2014-09-28

    Colon capsule endoscopy is recommended in Europe alternatively to colonoscopy for colorectal cancer screening in average risk individuals. The procedure has also been proposed to complete colon examination in cases of incomplete colonoscopy or when colonoscopy is contraindicated or refused by the patient. As tissue samples cannot be obtained with the current capsule device, colon capsule endoscopy has no place in diagnosing ulcerative colitis or in dysplasia surveillance. Nevertheless, data are accumulating regarding its feasibility to examine ulcerative colitis disease extent and to monitor disease activity and mucosal healing, even though reported results on the capsule's performance in this field vary greatly. In this review we present the currently available evidence for the use of colon capsule endoscopy to complement colonoscopy failure to reach the cecum and its use to evaluate ulcerative colitis disease activity and extent. Moreover, we provide an outlook on issues requiring further investigation before the capsule becomes a mainstream alternative to colonoscopy in such cases.

  19. Physico-chemical properties of alginate/shellac aqueous-core capsules: Influence of membrane architecture on riboflavin release.

    Science.gov (United States)

    Ben Messaoud, Ghazi; Sánchez-González, Laura; Probst, Laurent; Jeandel, Carole; Arab-Tehrany, Elmira; Desobry, Stéphane

    2016-06-25

    To enhance physico-chemical properties of alginate liquid-core capsules, shellac was incorporated into the membrane (composite capsules) or as an additional external layer (coated capsules). The influence of pH, coating time, shellac concentration and preparation mechanism (acid or calcium precipitation) were investigated. Results showed that shellac significantly influenced the capsules properties. The feasibility of shellac incorporation was closely related to the preparation conditions as confirmed by Infrared spectroscopy. Optical, fluorescence and scanning electron microscopy, highlighted different capsules and membranes architectures. In contrast to simple and composite capsules, coated capsules showed a pH-dependent release of the entrapped vitamin especially after shellac crosslinking with calcium. Heating of coated capsules above the glass transition temperature investigated by Differential Scanning Calorimetry, led to irreversible structural change due to thermoplastic behavior of shellac and enhanced riboflavin retention under acidic conditions. This global approach is useful to control release mechanism of low molecular weight molecules from macro and micro-capsules.

  20. Moisture diffusion and permeability characteristics of hydroxypropylmethylcellulose and hard gelatin capsules.

    Science.gov (United States)

    Barham, Ahmad S; Tewes, Frederic; Healy, Anne Marie

    2015-01-30

    The primary objective of this paper is to compare the sorption characteristics of hydroxypropylmethylcellulose (HPMC) and hard gelatin (HG) capsules and their ability to protect capsule contents. Moisture sorption and desorption isotherms for empty HPMC and HG capsules have been investigated using dynamic vapour sorption (DVS) at 25°C. All sorption studies were analysed using the Young-Nelson model equations which distinguishes three moisture sorption types: monolayer adsorption moisture, condensation and absorption. Water vapour diffusion coefficients (D), solubility (S) and permeability (P) parameters of the capsule shells were calculated. ANOVA was performed with the Tukey comparison test to analyse the effect of %RH and capsule type on S, P, and D parameters. The moisture uptake of HG capsules were higher than HPMC capsules at all %RH conditions studied. It was found that values of D and P across HPMC capsules were greater than for HG capsules at 0-40 %RH; whereas over the same %RH range S values were higher for HG than for HPMC capsules. S values decreased gradually as the %RH was increased up to 60% RH. To probe the effect of moisture ingress, spray dried lactose was loaded into capsules. Phase evolution was characterised by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and differential scanning calorimetry (DSC). The capsules under investigation are not capable of protecting spray dried lactose from induced solid state changes as a result of moisture uptake. For somewhat less moisture sensitive formulations, HPMC would appear to be a better choice than HG in terms of protection of moisture induced deterioration.

  1. Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

    OpenAIRE

    2014-01-01

    Wireless capsule endoscopy (WCE) is a promising technology for direct diagnosis of the entire small bowel to detect lethal diseases, including cancer and obscure gastrointestinal bleeding (OGIB). To improve the quality of diagnosis, some vital specifications of WCE such as image resolution, frame rate and working time need to be improved. Additionally, future multi-functioning robotic capsule endoscopy (RCE) units may utilize advanced features such as active system control over capsule motion...

  2. Photostability of Mecobalamin in Tablet and Capsule at the Dispensing Level

    OpenAIRE

    佐伯, 孝雄; 片桐, 義博; Hirano, Hidenari; 直良, 浩司

    1984-01-01

    Photostability of mecobalamin in solid dosage forms was investigated at dispensing level. Commercial products of one tablet and five capsules were used in packaged and bared conditions. The sample products were exposed to light for 20 days at 1500 lux. Assay was by high-performance liquid chromatography. The amount of mecobalamin in tablet and capsules decreased with lapse of photoirradiation time. Significant difference in the rate of photodegradation was observed between the capsule dosage ...

  3. Taenia solium: inhibition of spontaneous evagination of cysticerci by the host inflammatory capsule.

    Science.gov (United States)

    Ostrosky, L; Correa, D; Faradji, R; Garcia, H; Flisser, A

    1991-09-01

    The effect of the host's inflammatory capsule or of physical restraint on the spontaneous evagination capacity of Taenia solium cysticerci was evaluated. Parasites obtained from infected pig muscle, in which the surrounding inflammatory capsule was not eliminated, were unable to evaginate spontaneously after 12 or 60 h of culture. This phenomenon was not abolished when the capsule was eliminated and the parasites were cultured in semi-solid agar or in liquid medium.

  4. Biomimetic/Bioinspired Design of Enzyme@capsule Nano/Microsystems.

    Science.gov (United States)

    Shi, J; Jiang, Y; Zhang, S; Yang, D; Jiang, Z

    2016-01-01

    Enzyme@capsule nano/microsystems, which refer to the enzyme-immobilized capsules, have received tremendous interest owing to the combination of the high catalytic activities of encapsulated enzymes and the hierarchical structure of the capsule. The preparation of capsules and simultaneous encapsulation of enzymes is recognized as the core process for the rational design and construction of enzyme@capsule nano/microsystems. The strategy used has three major steps: (a) generation of the templates, (b) surface coating on the templates, and (c) removal of the templates, and it has been proven to be effective and versatile for the construction of enzyme@capsule nano/microsystems. Several conventional methods, including layer-by-layer assembly of polyelectrolytes, liquid crystalline templating method, etc., were used to design and construct enzyme@capsule nano/microsystems, but these have two major drawbacks. One is the low mechanical stability of the systems and the second is the harsh conditions used in the construction process. Learning from nature, several biomimetic/bioinspired methods such as biomineralization, biomimetic/bioinspired adhesion, and their combination have been exploited for the construction of enzyme@capsule nano/microsystems. In this chapter, we will present a general protocol for the construction of enzyme@capsule nano/microsystems using the latter approach. Some suggestions for improved design, construction, and characterization will also be presented with detailed procedures for specific examples.

  5. Learning to Diagnose Cirrhosis with Liver Capsule Guided Ultrasound Image Classification

    Directory of Open Access Journals (Sweden)

    Xiang Liu

    2017-01-01

    Full Text Available This paper proposes a computer-aided cirrhosis diagnosis system to diagnose cirrhosis based on ultrasound images. We first propose a method to extract a liver capsule on an ultrasound image, then, based on the extracted liver capsule, we fine-tune a deep convolutional neural network (CNN model to extract features from the image patches cropped around the liver capsules. Finally, a trained support vector machine (SVM classifier is applied to classify the sample into normal or abnormal cases. Experimental results show that the proposed method can effectively extract the liver capsules and accurately classify the ultrasound images.

  6. Improvement in Capsule Abort Performance Using Supersonic Aerodynamic Interaction by Fences

    Science.gov (United States)

    Koyama, Hiroto; Wang, Yunpeng; Ozawa, Hiroshi; Doi, Katsunori; Nakamura, Yoshiaki

    The space transportation system will need advanced abort systems to secure crew against serious accidents. Here this study deals with the capsule-type space transportation systems with a Launch Abort System (LAS). This system is composed of a conic capsule as a Launch Abort Vehicle (LAV) and a cylindrical rocket as a Service Module (SM), and the capsule is moved away from the rocket by supersonic aerodynamic interactions in an emergency. We propose a method to improve the performance of the LAV by installing fences at the edges of surfaces on the rocket and capsule sides. Their effects were investigated by experimental measurements and numerical simulations. Experimental results show that the fences on the rocket and capsule surfaces increase the aerodynamic thrust force on the capsule by 70% in a certain clearance between the capsule and rocket. Computational results show the detailed flow fields where the centripetal flow near the surface on the rocket side is induced by the fence on the rocket side and the centrifugal flow near the surface on the capsule side is blocked by the fence on the capsule side. These results can confirm favorable effects of the fences on the performance of the LAS.

  7. Inductive-Based Wireless Power Recharging System for an Innovative Endoscopic Capsule

    Directory of Open Access Journals (Sweden)

    Giuseppe Tortora

    2015-09-01

    Full Text Available Wireless capsule endoscopic devices are adopted for painless diagnosis of cancer and other diseases affecting the gastrointestinal tract as an alternative to traditional endoscopy. Although much work has been done to improve capsule performance in terms of active navigation, a major drawback is the limited available energy on board the capsule, usually provided by a battery. Another key shortcoming of active capsules is their limitation in terms of active functionalities and related costs. An inductive-based wireless recharging system for the development of an innovative capsule for colonoscopy is proposed in this paper; the aim is to provide fast off-line battery recovery for improving capsule lifecycle and thus reducing the cost of a single endoscopic procedure. The wireless recharging system has been properly designed to fit the dimensions of a capsule for colonoscopy but it can be applied to any biomedical devices to increase the number of times it can be used after proper sterilization. The current system is able to provide about 1 W power and is able to recharge the battery capsule in 20 min which is a reasonable time considering capsule operation time (10–15 min.

  8. Simulations of indirectly driven gas-filled capsules at the National Ignition Facility

    Energy Technology Data Exchange (ETDEWEB)

    Weber, S. V.; Casey, D. T.; Eder, D. C.; Pino, J. E.; Smalyuk, V. A.; Remington, B. A.; Rowley, D. P.; Yeamans, C. B.; Tipton, R. E.; Barrios, M.; Benedetti, R.; Berzak Hopkins, L.; Bleuel, D. L.; Bond, E. J.; Bradley, D. K.; Caggiano, J. A.; Callahan, D. A.; Cerjan, C. J.; Clark, D. S.; Divol, L. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); and others

    2014-11-15

    Gas-filled capsules imploded with indirect drive on the National Ignition Facility have been employed as symmetry surrogates for cryogenic-layered ignition capsules and to explore interfacial mix. Plastic capsules containing deuterated layers and filled with tritium gas provide a direct measure of mix of ablator into the gas fuel. Other plastic capsules have employed DT or D{sup 3}He gas fill. We present the results of two-dimensional simulations of gas-filled capsule implosions with known degradation sources represented as in modeling of inertial confinement fusion ignition designs; these are time-dependent drive asymmetry, the capsule support tent, roughness at material interfaces, and prescribed gas-ablator interface mix. Unlike the case of cryogenic-layered implosions, many observables of gas-filled implosions are in reasonable agreement with predictions of these simulations. Yields of TT and DT neutrons as well as other x-ray and nuclear diagnostics are matched for CD-layered implosions. Yields of DT-filled capsules are over-predicted by factors of 1.4–2, while D{sup 3}He capsule yields are matched, as well as other metrics for both capsule types.

  9. Inadvertent Trypan Blue Staining of Posterior Capsule during Cataract Surgery Associated with “Argentinian Flag” Event

    Directory of Open Access Journals (Sweden)

    Robert A. Prinzi

    2016-01-01

    Full Text Available Trypan blue is common in visualizing the anterior capsule during cataract surgery. Inadvertent staining of the posterior capsule during phacoemulsification is a rare complication and there are few reports in the literature. The proposed mechanism of posterior capsule staining in previous reports includes a compromised zonular apparatus or iris retractors facilitating the posterior flow of trypan blue. We report the first case of trypan blue staining of the posterior capsule associated with the “Argentinian flag” sign. In our case, the “Argentinian flag” allowed the trypan blue to seep between the posterior capsule and the lens, staining the anterior surface of the posterior capsule.

  10. 3D numerical simulations of vesicle and inextensible capsule dynamics

    Science.gov (United States)

    Farutin, Alexander; Biben, Thierry; Misbah, Chaouqi

    2014-10-01

    Vesicles are locally-inextensible fluid membranes, capsules are endowed with in-plane shear elasticity mimicking the cytoskeleton of red blood cells (RBCs), but are extensible, while RBCs are inextensible. We use boundary integral (BI) methods based on the Green function techniques to model and solve numerically their dynamics. We regularize the single layer integral by subtraction of exact identities for the terms involving the normal and the tangential components of the force. The stability and precision of BI calculation is enhanced by taking advantage of additional quadrature nodes located in vertices of an auxiliary mesh, constructed by a standard refinement procedure from the main mesh. We extend the partition of unity technique to boundary integral calculation on triangular meshes. The proposed algorithm offers the same treatment of near-singular integration regardless whether the source and the target points belong to the same surface or not. Bending forces are calculated by using expressions derived from differential geometry. Membrane incompressibility is handled by using two penalization parameters per suspended entity: one for deviation of the global area from prescribed value and another for the sum of squares of local strains defined on each vertex. Extensible or inextensible capsules, a model of RBC, are studied by storing the position in the reference configuration for each vertex. The elastic force is then calculated by direct variation of the elastic energy. Various nonequilibrium physical examples on vesicles and capsules will be presented and the convergence and precision tests highlighted. Overall, a good convergence is observed with numerical error inversely proportional to the number of vertices used for surface discretization, the highest order of convergence allowed by piece-wise linear interpolation of the surface.

  11. Capsule collection for women's plus-size clothing brand

    OpenAIRE

    Vähäkangas, Oona

    2016-01-01

    The objective of the thesis was to design a capsule collection for women’s plus-size clothing brand called annascholz Ltd. The thesis was based on a design studio internship period that was carried out by the author at the company during summer 2016 and knowledge gained during that time. The thesis consisted of two parts: the first part was the research part and the second the practice-based design part. In the research part more information was gained of the target group by reading studie...

  12. Factors associated with incomplete small bowel capsule endoscopy studies

    Institute of Scientific and Technical Information of China (English)

    Mitchell; M; Lee; Andrew; Jacques; Eric; Lam; Ricky; Kwok; Pardis; Lakzadeh; Ajit; Sandhar; Brandon; Segal; Sigrid; Svarta; Joanna; Law; Robert; Enns

    2010-01-01

    AIM:To identify patient risk factors associated with incomplete small bowel capsule endoscopy(CE) studies.METHODS:Data from all CE procedures performed at St.Paul's Hospital in Vancouver,British Columbia,Canada,between December 2001 and June 2008 were collected and analyzed on a retrospective basis.Data collection for complete and incomplete CE study groups included patient demographics as well as a number of potential risk factors for incomplete CE including indication for the procedure,hospitalization,dia...

  13. Design of on-demand wireless capsule endoscope

    Institute of Scientific and Technical Information of China (English)

    Yang Li; Eric W Able; Peng Chenglin

    2008-01-01

    An on-demand wireless capsule endoscope with full-digital and bidirectional communication is presented,aiming at fulfilling the requirements of micromation and micropower consumption of modern wireless endoscope.The proposed multifunctional operation and unique radio transmission system cuts down the power consumption efficiently and on-demand bidirectional communication in vitro improves the detection rate of focus.Meanwhile,gray dilatation is introduced in a bit plane that optimizes the distortion rate in the process of image recording and transmission.

  14. Treatment of rheumatoid arthritis by Xinfeng capsule: an efficacy observation

    Institute of Scientific and Technical Information of China (English)

    黄传兵

    2014-01-01

    Objective To observe the curative effect of Xinfeng Capsule(XC)in treatment of rheumatoid arthritis(RA).Methods Recruited were 80 active RA patients,who were randomly assigned to the normal control group and the treatment group,40 in each group.All patients received the same routine anti-rheumatic treatment:Methotrexate 10 mg per week;Diclofenac 50 mg when painwas obvious,twice daily.Patients in the treatment group took XC 3 tablets each time,thrice daily.All treatment lasted for 12

  15. Effectiveness of Qiangjijianli capsule on experimental autoimmune myasthenia gravis

    Institute of Scientific and Technical Information of China (English)

    Shunmin Li; Bo Fu; Yuyan Li; DongYang; Shudong Yang

    2006-01-01

    BACKGROUND: Experimental autoimmune myasthenia gravis(EAMG) and anti-AchR antibody of human myasthenia gravis are the same immune globulin.This antibody restricts the activity of nicotinic acetylcholine receptor and the amount of receptor binding sites is decreased,so myasthenia gravis occurs.OBJECTIVE: To observe the therapeutic effect and mechanism of action of Qiangjijianli capsule on EAMG rats.DESIGN:A randomized controlled animal experiment.SETTING: Experimental Animal Center of Guangzhou University of Traditional Chinese Medicine.MATERIALS: Acetylcholine receptors(AchR)were extracted from electric skate's electric organ which lives in the sea near Guangzhou.It had high biological activity and the protein content was 1.63 g/L.Qiangjijianli capsule (Astragalus mongholicus,Codonopsis pilosula,Atractylodes macrocephala,Angelica sinensis,Bupleurum chinense,Cairo morningglory root or leaf,Glycyrrhixa uralensis,etc.0.5 g crude drug per capsule) was bought from the Manufacturing Laboratory of Guangzhou University of Traditional Chinese Medicine with the Batch No.89-11-1.METHODS:This experiment was carried out in the Experimental Animal Center of Guangzhou University of Traditional Chinese Medicine from May to August 1990.①Adult female SD rats were immunized with AchR.The animals' movement condition was observed and recorded everyday. Ten rats were chosen as normal control group.and they were not given any treatment and raised normally.After modeled,20 successful rats were randomly assigned into 2 groups:treatmental group and model group. 2 mL Qiangjijianli capsule suspension(1 g)was intragastrically administrated into each rat of treatmental group for 30 days; The same amount of clean water was intragastrically administrated into the rats of model group for 30 days.(2)Serum AchR antibody was measured with ABC-ELISA method. After administration,the rats were sacrificed.The complete diaphragmatic muscle was extracted for in vitro receptor binding test

  16. Analysis of lomustine drug content in FDA-approved and compounded lomustine capsules.

    Science.gov (United States)

    KuKanich, Butch; Warner, Matt; Hahn, Kevin

    2017-02-01

    OBJECTIVE To determine the lomustine content (potency) in compounded and FDA-approved lomustine capsules. DESIGN Evaluation study. SAMPLE 2 formulations of lomustine capsules (low dose [7 to 11 mg] and high dose [40 to 48 mg]; 5 capsules/dose/source) from 3 compounders and from 1 manufacturer of FDA-approved capsules. PROCEDURES Lomustine content was measured by use of a validated high-pressure liquid chromatography method. An a priori acceptable range of 90% to 110% of the stated lomustine content was selected on the basis of US Pharmacopeia guidelines. RESULTS The measured amount of lomustine in all compounded capsules was less than the stated content (range, 59% to 95%) and was frequently outside the acceptable range (failure rate, 2/5 to 5/5). Coefficients of variation for lomustine content ranged from 4.1% to 16.7% for compounded low-dose capsules and from 1.1% to 10.8% for compounded high-dose capsules. The measured amount of lomustine in all FDA-approved capsules was slightly above the stated content (range, 104% to 110%) and consistently within the acceptable range. Coefficients of variation for lomustine content were 0.5% for low-dose and 2.3% for high-dose FDA-approved capsules. CONCLUSIONS AND CLINICAL RELEVANCE Compounded lomustine frequently did not contain the stated content of active drug and had a wider range of lomustine content variability than did the FDA-approved product. The sample size was small, and larger studies are needed to confirm these findings; however, we recommend that compounded veterinary formulations of lomustine not be used when appropriate doses can be achieved with FDA-approved capsules or combinations of FDA-approved capsules.

  17. OMOM capsule endoscopy in diagnosis of small bowel disease

    Institute of Scientific and Technical Information of China (English)

    Chen-yi LI; Bing-ling ZHANG; Chun-xiao CHEN; You-ming LI

    2008-01-01

    Objective: To assess the diagnostic efficiency of OMOM capsule endoscopy (CE) in a group of patients with different indications. Methods: Data from 89 consecutive patients (49 males, 40 females) with suspected small bowel disease who under-went OMOM CE (Jinshan Science and Technology Company, Chongqing, China) examination were obtained by retrospective review. The patients' indications of the disease consisted of the following: obscure gastrointestinal bleeding (OGIB), abdominal pain or diarrhea, partial intestinal obstruction, suspected inflammatory bowel disease, tumor of unknown origin, hypoproteinemia, constipation, weight loss, and elevated tumor markers. Results: CE failed in one patient. Visualization of the entire small bowel was achieved in 75.0%. Capsules were naturally excreted by all patients. The detection rate of abnormalities was 70.5% for pa-tients with suspected small bowel disease, and the diagnostic yield for patients with OGIB was higher than that for patients with abdominal pain or diarrhea (85.7% vs 53.3%, P<0.005). Angiodysplasia was the most common small bowel finding. Active bleeding sites were noted in the small intestine in 11 cases. Conclusion: OMOM CE is a useful diagnostic tool for the diagnosis of variably suspected small bowel disease, whose diagnostic efficiency is similar to that of the Pillcam SB (small bowel) CE (Given Imaging, Yoqneam, Israel).

  18. Blood detection in wireless capsule endoscopy using expectation maximization clustering

    Science.gov (United States)

    Hwang, Sae; Oh, JungHwan; Cox, Jay; Tang, Shou Jiang; Tibbals, Harry F.

    2006-03-01

    Wireless Capsule Endoscopy (WCE) is a relatively new technology (FDA approved in 2002) allowing doctors to view most of the small intestine. Other endoscopies such as colonoscopy, upper gastrointestinal endoscopy, push enteroscopy, and intraoperative enteroscopy could be used to visualize up to the stomach, duodenum, colon, and terminal ileum, but there existed no method to view most of the small intestine without surgery. With the miniaturization of wireless and camera technologies came the ability to view the entire gestational track with little effort. A tiny disposable video capsule is swallowed, transmitting two images per second to a small data receiver worn by the patient on a belt. During an approximately 8-hour course, over 55,000 images are recorded to a worn device and then downloaded to a computer for later examination. Typically, a medical clinician spends more than two hours to analyze a WCE video. Research has been attempted to automatically find abnormal regions (especially bleeding) to reduce the time needed to analyze the videos. The manufacturers also provide the software tool to detect the bleeding called Suspected Blood Indicator (SBI), but its accuracy is not high enough to replace human examination. It was reported that the sensitivity and the specificity of SBI were about 72% and 85%, respectively. To address this problem, we propose a technique to detect the bleeding regions automatically utilizing the Expectation Maximization (EM) clustering algorithm. Our experimental results indicate that the proposed bleeding detection method achieves 92% and 98% of sensitivity and specificity, respectively.

  19. [Human joint capsule in osteoarthrosis (morpholocical changes) (author's transl)].

    Science.gov (United States)

    Dettmer, N; Barz, B

    1977-07-29

    Morphological investigations of the joint capsules in osteoarthrotic-changed joints have given rise to doubts about the present theory of the causal aetiology of the osteoarthrosis. In every inspected and demonstrated illustration beside the partly normal capsules segments could be found every transition between mild regressive alterations and most massive proliferative changes of the conective tissue and the lining cell layer. It was extraordinary, that the strongly dilated vessels were filled with red blood cells. In another part of the same case was found a massive stricture caused by concentrically deposited substances, which were impregnated with collagenous fibers. Regeneration of the vessels frequently happened adjacent totally obstructed ones. Round-cell infiltrations, granulocytes or other indications of an inflammatory synovitis are found only in a few cases. The intracartilaginous enzymatic reactions, which have been much talked of and which were explained as characteristic of the osteoarthrosis cannot be the cause of the degradation of the cartilage, particularly, because of the normal cell count which is to be found in the synovial fluid. We can answer this problem, if we can prove that the substrates of the chondral metabolism themselves exert a direct or indirect influence on the interstitial connective tissue with induction of the powerful proliferation of the same tissue. The changes in the transit zone would be secondary and their effect on the lining cell layer would increase the progression of the arthrotic events.

  20. Theoretical study of symmetry of flux onto a capsule

    Energy Technology Data Exchange (ETDEWEB)

    Duan, Hao; Wu, Changshu; Zou, Shiyang, E-mail: duan-hao@iapcm.ac.cn [Institute of Applied Physics and Computational Mathematics, Beijing 100094 (China); Pei, Wenbing [Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai 201800 (China)

    2015-09-15

    An analytic model to describe the flux asymmetry onto a capsule based on the viewfactor approximation is developed and verified with numerical simulations. By using a nested spheres technique to represent the various sources of flux asymmetry, the model can treat spherically and cylindrically symmetric hohlraums, e.g., cylinder, elliptic, and rugby. This approach includes the more realistic case of frequency-dependent flux asymmetry compared with the more standard frequency-integrated or single-frequency approaches [D. W. Phillion and S. M. Pollaine, Phys. Plasmas 1, 2963 (1994)]. Correspondingly, the approach can be used to assess x-ray preheat asymmetry generated from localized laser absorption in the high-Z hohlraum wall. For spherical hohlraums with 4, 6, or 8 laser entrance holes (LEHs), an optimal configuration of LEHs, laser spot placement, and angle-of-incidence of the single-ringed laser beams is defined. An analogy between minimizing the flux asymmetry onto a capsule and the Thomson problem of point charge placement on a sphere for minimized energy is shown.

  1. Diagnosis of Ascaris lumbricoides infection using capsule endoscopy.

    Science.gov (United States)

    Yamashita, Eduardo Tomohissa; Takahashi, Wagner; Kuwashima, Daniel Yuiti; Langoni, Tiago Ribeiro; Costa-Genzini, Adriana

    2013-04-16

    Ascaris lumbricoides (A. lumbricoides) is the most common intestinal roundworm parasite, infecting approximately one quarter of the world's population. Infection can lead to various complications because it can spread along the gastrointestinal tract. Although A. lumbricoides infection is a serious healthcare issue in developing countries, it now also has a worldwide distribution as a result of increased immigration and travel. Intestinal obstruction is the most common complication of A. lumbricoides infection, potentially leading to even more serious consequences such as small bowel perforation and peritonitis. Diagnosis is based primarily on stool samples and the patient's history. Early diagnosis, aided in part by knowledge of the local prevalence, can result in early treatment, thereby preventing surgical complications associated with intestinal obstruction. Further, delay in diagnosis may have fatal consequences. Capsule endoscopy can serve as a crucial, non-invasive diagnostic tool for A. lumbricoides infection, especially when other diagnostic methods have failed to detect the parasite. We report a case of A. lumbricoides infection that resulted in intestinal obstruction at the level of the ileum. Both stool sample examination and open surgery failed to indicate the presence of A. lumbricoides, and the cause of the obstruction was only revealed by capsule endoscopy. The patient was treated with anthelmintics.

  2. Light-Responsive Polymer Micro- and Nano-Capsules

    Directory of Open Access Journals (Sweden)

    Valentina Marturano

    2016-12-01

    Full Text Available A significant amount of academic and industrial research efforts are devoted to the encapsulation of active substances within micro- or nanocarriers. The ultimate goal of core–shell systems is the protection of the encapsulated substance from the environment, and its controlled and targeted release. This can be accomplished by employing “stimuli-responsive” materials as constituents of the capsule shell. Among a wide range of factors that induce the release of the core material, we focus herein on the light stimulus. In polymers, this feature can be achieved introducing a photo-sensitive segment, whose activation leads to either rupture or modification of the diffusive properties of the capsule shell, allowing the delivery of the encapsulated material. Micro- and nano-encapsulation techniques are constantly spreading towards wider application fields, and many different active molecules have been encapsulated, such as additives for food-packaging, pesticides, dyes, pharmaceutics, fragrances and flavors or cosmetics. Herein, a review on the latest and most challenging polymer-based micro- and nano-sized hollow carriers exhibiting a light-responsive release behavior is presented. A special focus is put on systems activated by wavelengths less harmful for living organisms (mainly in the ultraviolet, visible and infrared range, as well as on different preparation techniques, namely liposomes, self-assembly, layer-by-layer, and interfacial polymerization.

  3. Five years' experience with capsule endoscopy in a single Center

    Institute of Scientific and Technical Information of China (English)

    Taylan Kav; Yusuf Bayraktar

    2009-01-01

    Capsule endoscopy (CE) is a novel technology that facilitates highly effective and noninvasive imaging of the small bowel. Although its efficacy in the evaluation of obscure gastrointestinal bleeding (OGIB) has been proven in several trials, data on uses of CE in different small bowel diseases are rapidly accumulating in the literature, and it has been found to be superior to alternative diagnostic tools in a range of such diseases.Based on literature evidence, CE is recommended as a first-line investigation for OGIB after negative bidirectional endoscopy. CE has gained an important role in the diagnosis and follow-up of Crohn's disease and celiac disease and in the surveillance of small bowel tumors and polyps in selected patients. Capsule retention is the major complication, with a frequency of 1%-2%. The purpose of this review was to discuss the procedure, indications, contraindications and adverse effects associated with CE. We also review and share our five-year experience with CE in various small bowel diseases. The recently developed balloon-assisted enteroscopies have both diagnostic and therapeutic capability. At the present time, CE and balloon-assisted enteroscopies are complementary techniques in the diagnosis and management of small bowel diseases.

  4. What the Research Tells Us: Class Size Reduction. Information Capsule. Volume 1001

    Science.gov (United States)

    Romanik, Dale

    2010-01-01

    This Information Capsule examines the background and history in addition to research findings pertaining to class size reduction (CSR). This Capsule concludes that although educational researchers have not definitively agreed upon the effectiveness of CSR, given its almost universal public appeal, there is little doubt it is here to stay in some…

  5. The capsule's contribution to total hip construct stability--a finite element analysis.

    Science.gov (United States)

    Elkins, Jacob M; Stroud, Nicholas J; Rudert, M James; Tochigi, Yuki; Pedersen, Douglas R; Ellis, Benjamin J; Callaghan, John J; Weiss, Jeffrey A; Brown, Thomas D

    2011-11-01

    Instability is a significant concern in total hip arthroplasty (THA), particularly when there is structural compromise of the capsule due to pre-existing pathology or due to necessities of surgical approach. An experimentally grounded fiber-direction-based finite element model of the hip capsule was developed, and was integrated with an established three-dimensional model of impingement/dislocation. Model validity was established by close similarity to results from a cadaveric experiment in a servohydraulic hip simulator. Parametric computational runs explored effects of graded levels of capsule thickness, of regional detachment from the capsule's femoral or acetabular insertions, of surgical incisions of capsule substance, and of capsule defect repairs. Depending strongly upon the specific site, localized capsule defects caused varying degrees of construct stability compromise, with several specific situations involving over 60% decrement in dislocation resistance. Construct stability was returned substantially toward intact-capsule levels following well-conceived repairs, although the suture sites involved were often at substantial risk of failure. These parametric model results underscore the importance of retaining or robustly repairing capsular structures in THA, in order to maximize overall construct stability. 

  6. Improved Water Barrier Properties of Calcium Alginate Capsules Modified by Silicone Oil

    Directory of Open Access Journals (Sweden)

    Brian G. Zukas

    2016-04-01

    Full Text Available Calcium alginate films generally offer poor diffusion resistance to water. In this study, we present a technique for encapsulating aqueous drops in a modified calcium alginate membrane made from an emulsion of silicone oil and aqueous alginate solution and explore its effect on the loss of water from the capsule cores. The capsule membrane storage modulus increases as the initial concentration of oil in the emulsion is increased. The water barrier properties of the fabricated capsules were determined by observing the mass loss of capsules in a controlled environment. It was found that capsules made with emulsions containing 50 wt% silicone oil were robust while taking at least twice the time to dry completely as compared to capsules made from only an aqueous alginate solution. The size of the oil droplets in the emulsion also has an effect on the water barrier properties of the fabricated capsules. This study demonstrates a facile method of producing aqueous core alginate capsules with a modified membrane that improves the diffusion resistance to water and can have a wide range of applications.

  7. Summary of the irradiation history of the TRIST-ER1 capsule

    Energy Technology Data Exchange (ETDEWEB)

    Qualls, A.L.; Eatherly, W.S.; Heatherly, D.W. [Oak Ridge National Lab., TN (United States)

    1996-10-01

    The TRIST-ERI capsule was assembled and irradiated in a large Removable Beryllium (RB{star}) position of the High Flux Isotope Reactor (HFIR) during this reporting period. Irradiation began on March 8, 1996, was completed on June 20, 1996, during operating cycles 344, 345, and 346. This report describes the thermal operation of the capsule.

  8. Klebsiella pneumoniae capsule expression is necessary for colonization of large intestines of streptomycin-treated mice

    DEFF Research Database (Denmark)

    Favre-Bonte, S.; Licht, Tine Rask; Forestier, C.;

    1999-01-01

    The role of the Klebsiella pneumoniae capsular polysaccharide (K antigen) during colonization of the mouse large intestine was assessed with mild-type K. pneumoniae LM21 and its isogenic capsule-defective mutant. When bacterial strains were fed alone to mice, the capsulated bacteria persisted....... pneumoniae....

  9. A novel capsule-based selfrecovery system with a chloride ion trigger

    NARCIS (Netherlands)

    Xiong, W.; Tang, J.; Zhu, G.; Han, N.; Schlangen, E.; Dong, B.; Wang, X.; Xing, F.

    2015-01-01

    Steel is prone to corrosion induced by chloride ions, which is a serious threat to reinforced concrete structures, especially in marine environments. In this work, we report a novel capsule-based selfrecovery system that utilizes chloride ions as a trigger. These capsules, which are functionalized v

  10. TEMPO-oxidized Konjac glucomannan as appliance for the preparation of hard capsules

    NARCIS (Netherlands)

    Chen, Yuying; Zhao, Huiying; Liu, Xianwu; Li, Zusen; Liu, Bin; Wu, Jiande; Shi, Mengxuan; Norde, Willem; Li, Yuan

    2016-01-01

    TEMPO-oxidized Konjac glucomannan (OKGM) was developed as new material for preparing vegetarian hard capsules. OKGM of different degrees of oxidation: DO30%, DO50%, and DO80% were prepared to select optimum DO for capsule formation. FT-IR results proved that the primary alcohol groups on KGM were

  11. The association of matrix Gla protein isomers with calcification in capsules surrounding silicone breast implants.

    Science.gov (United States)

    Hunter, Larry W; Lieske, John C; Tran, Nho V; Miller, Virginia M

    2011-11-01

    Implanted silicone medical prostheses induce a dynamic sequence of histologic events in adjacent tissue resulting in the formation of a fibrotic peri-prosthetic capsule. In some cases, capsular calcification occurs, requiring surgical intervention. In this study we investigated capsules from silicone gel-filled breast prostheses to test the hypothesis that this calcification might be regulated by the small vitamin K-dependent protein, matrix Gla protein (MGP), a potent inhibitor of arterial calcification, or by Fetuin-A, a hepatocyte-derived glycoprotein also implicated as a regulator of pathologic calcification. Immunolocalization studies of explanted capsular tissue, using conformation-specific antibodies, identified the mineralization-protective γ-carboxylated MGP isomer (cMGP) within cells of uncalcified capsules, whereas the non-functional undercarboxylated isomer (uMGP) was typically absent. Both were upregulated in calcific capsules and co-localized with mineral plaque and adjacent fibers. Synovial-like metaplasia was present in one uncalcified capsule in which MGP species were differentially localized within the pseudosynovium. Fetuin-A was localized to cells within uncalcified capsules and to mineral deposits within calcific capsules. The osteoinductive cytokine bone morphogenic protein-2 localized to collagen fibers in uncalcified capsules. These findings demonstrate that MGP, in its vitamin K-activated conformer, may represent a pharmacological target to sustain the health of the peri-prosthetic tissue which encapsulates silicone breast implants as well as other implanted silicone medical devices.

  12. Hydrocolloid liquid-core capsules for the removal of heavy-metal cations from water.

    Science.gov (United States)

    Nussinovitch, A; Dagan, O

    2015-12-15

    Liquid-core capsules with a non-crosslinked alginate fluidic core surrounded by a gellan membrane were produced in a single step to investigate their ability to adsorb heavy metal cations. The liquid-core gellan-alginate capsules, produced by dropping alginate solution with magnesium cations into gellan solution, were extremely efficient at adsorbing lead cations (267 mg Pb(2+)/g dry alginate) at 25 °C and pH 5.5. However, these capsules were very weak and brittle, and an external strengthening capsule was added by using magnesium cations. The membrane was then thinned with the surfactant lecithin, producing capsules with better adsorption attributes (316 mg Pb(+2)/g dry alginate vs. 267 mg Pb(+2)/g dry alginate without lecithin), most likely due to the thinner membrane and enhanced mass transfer. The capsules' ability to adsorb other heavy-metal cations - copper (Cu(2+)), cadmium (Cd(2+)) and nickel (Ni(2+)) - was tested. Adsorption efficiencies were 219, 197 and 65 mg/g, respectively, and were correlated with the cation's affinity to alginate. Capsules with the sorbed heavy metals were regenerated by placing in a 1M nitric acid suspension for 24h. Capsules could undergo three regeneration cycles before becoming damaged.

  13. 21 CFR 189.301 - Tin-coated lead foil capsules for wine bottles.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Tin-coated lead foil capsules for wine bottles. 189... lead foil capsules for wine bottles. (a) Tin-coated lead foil is composed of a lead foil coated on one... covering applied over the cork and neck areas) on wine bottles to prevent insect infestation, as a...

  14. Potential of sago starch/carrageenan mixture as gelatin alternative for hard capsule material

    Science.gov (United States)

    Poeloengasih, Crescentiana Dewi; Pranoto, Yudi; Anggraheni, Frida Dwi; Marseno, Djagal Wiseso

    2017-03-01

    In order to replace gelatin in capsule shell production, blends of sago starch and carrageenan were developed. Films and capsules were prepared with 10% (w/v) of sago starch, 25% (w/w starch) of glycerol and various carrageenan concentration (1, 2, 3% w/w starch) in two different kappa/iota-carrageenan ratio (1:3 and 3:1). The resulted films and capsules were characterized by mechanical property, water vapor and oxygen permeability. In addition, moisture absorption and solubility of capsule in acid solution were investigated. The results reveal that addition of carrageenan makes the films stronger and less permeable. Higher kappa-carrageenan content improved tensile strength and barrier properties of the films, whereas higher iota-carrageenan content produced films with higher elongation, moisture absorption and capsule solubility in acid solution. Capsule with 2% (w/w starch) of carrageenan at kappa-/iota-ratio 3:1 had the lowest moisture absorption, whereas capsule with 3% (w/w starch) of carrageenan at kappa/iota ratio 1:3 had the highest solubility. It is illustrated that sago starch/carrageenan blends can be used as hard capsule material.

  15. Calculation of Temperature Distribution in Capsule for Neutron Exposure of the Cold Moderator Materials

    CERN Document Server

    Ro Du Min

    2004-01-01

    Methods and results of the numerical calculation of temperature distribution in the spherical segmented small capsule filled with heat-generating substance are presented. Variable finite-difference method allowed one to evaluate a small drop of temperature near the boundary between the filling substance and the thermocouple installed inside the capsule, which originates from the difference in thermal conductivity.

  16. Fourier transform infrared spectroscopy studies of alginate-PLL capsules with varying compositions

    NARCIS (Netherlands)

    van Hoogmoed, CG; Busscher, HJ; de Vos, P

    2003-01-01

    Microencapsulation of cells is a promising approach to prevention of rejection in the absence of immunosuppression. Clinical application, however, is hampered by insufficient insight into the factors that influence the biocompatibility of the capsules. Capsules prepared of alginates with a high gulu

  17. Biocompatibility and surface structure of chemically modified immunoisolating alginate-PLL capsules

    NARCIS (Netherlands)

    Bunger, CM; Gerlach, C; Freier, T; Schmitz, KP; Pilz, M; Werner, C; Jonas, L; Schareck, W; Hopt, UT; de Vos, P

    2003-01-01

    Grafting of encapsulated living cells has the potential to cure a wide variety of diseases. Large-scale application of the technique, however, is hampered by insufficient biocompatibility of the capsules. A major factor in the biocompatibility of capsules is inadequate covering of the inflammatory p

  18. Visual quality inspection of capsule heads utilizing shape and gray information

    Science.gov (United States)

    Wang, Qi; Zhang, Tie; Cai, Zhenlin; Jiang, Nan; Wu, Jiamei; Zhang, Xiangde

    2015-11-01

    Capsule quality inspection is important and necessary in the pharmaceutical industry. The popular methods often mis-detect capsule head defects. To solve this problem, we propose a high-quality visual defect inspection method for capsule heads. In detail, first, capsule head images are captured by high-speed cameras with ring illuminators. Then, radial symmetry transform (RST) is employed to locate region of interest (ROI). Next, the ROI image is enhanced by homomorphic filter and binarized by basic global thresholding. After that, six discriminative features of ROI are extracted, which are skeleton feature, binary density, number of connected boundaries, RST power, mean, and variance. Finally, these features are classified by support vector machine to inspect the quality of the capsule head. The experiment is carried out on a self-established capsule image database, Northeastern University Capsule Image Database Version 1.0. According to our experiment, the proposed method can detect ROI correctly for all of the capsule head images and inspection accuracy achieves a true positive rate of 100.00% and true negative rate of 100.00%.

  19. Design and statistical optimization of osmotically driven capsule based on push-pull technology.

    Science.gov (United States)

    Shaikh, Wasim; Deshmukh, Prashant K; Patil, Ganesh B; Chatap, Vivekanand K; Bari, Sanjay B

    2013-01-01

    In present investigation attempt was made to develop and statistically optimize osmotically active capsule tailor made from the concept of bilayer (push-pull) osmotic tablet technology. The capsule was comprised of active (drug) and push (osmogen) layer. Active layer was compressed in form of tablet by mixing known amount of drug and formulation excipients. Similarly push layer was made by compressing Mannitol with formulation excipients. Finally, both layers were packed in hard gelatin capsule having small aperture at top and coated with semipermeable membrane to form osmotically active capsule. Formulated and optimized capsules were characterized for Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetric (DSC), scanning electron microscopy, In-vitro drug release study and Release models and kinetics. Statistically optimized formulation showed good correlation between predicted and experimented results, which further confirms the practicability and validity of the model.

  20. Ignition capsules with aerogel-supported liquid DT fuel for the National Ignition Facility

    Directory of Open Access Journals (Sweden)

    Ho D.D.-M.

    2013-11-01

    Full Text Available For high repetition-rate fusion power plant applications, capsules with aerogel-supported liquid DT fuel can have much reduced fill time compared to β-layering a solid DT fuel layer. The melting point of liquid DT can be lowered once liquid DT is embedded in an aerogel matrix, and the DT vapor density is consequently closer to the desired density for optimal capsule design requirement. We present design for NIF-scale aerogel-filled capsules based on 1-D and 2-D simulations. An optimal configuration is obtained when the outer radius is increased until the clean fuel fraction is within 65 – 75% at peak velocity. A scan (in ablator and fuel thickness parameter space is used to optimize the capsule configurations. The optimized aerogel-filled capsule has good low-mode robustness and acceptable high-mode mix.

  1. Development of capsule design support subprograms for 3-dimensional temperature calculation using FEM Code NISA

    Energy Technology Data Exchange (ETDEWEB)

    Tobita, Masahiro; Matsui, Yoshinori [Japan Atomic Energy Research Inst., Oarai, Ibaraki (Japan). Oarai Research Establishment

    2003-03-01

    Prediction of irradiation temperature is one of the important issues in the design of the capsule for irradiation test. Many kinds of capsules with complex structure have been designed for recent irradiation requests, and three-dimensional (3D) temperature calculation becomes inevitable for the evaluation of irradiation temperature. For such 3D calculation, however, many works are usually needed for input data preparation, and a lot of time and resources are necessary for parametric studies in the design. To improve such situation, JAERI introduced 3D-FEM (finite element method) code NISA (Numerically Integrated elements for System Analysis) and developed several subprograms, which enabled to support input preparation works in the capsule design. The 3D temperature calculation of the capsule are able to carried out in much easier way by the help of the subprograms, and specific features in the irradiation tests such as non-uniform gamma heating in the capsule, becomes to be considered. (author)

  2. Design modification and stress analysis of bottom structure for the instrumented capsule

    Energy Technology Data Exchange (ETDEWEB)

    Choi, M. H.; Kang, Y. H.; Joo, K. N.; Oh, J. M.; Joe, M. S.; Ryu, J. S.; Jeo, Y. G. [KAERI, Taejon (Korea, Republic of)

    2003-10-01

    The bottom structure of the instrumented capsule, which is used for the irradiation test in the HANARO incore, plays an important role to support the capsule main structure within the hexagonal flow tube. This paper is described the design modification and stress analysis results to obtain the structural integrity of bottom structure for the instrumented capsule. The capsule's bottom guide structure consisted of three guide pins before, but it is modified as one block structure to obtain an efficient flow of coolant water and a stabilized shape structurally. The structural integrity of the bottom structure is estimated by the stress calculation of components such as welding parts, bolts and neck parts of the rod tip due to the force applied by handling tool. The tensile and shear stresses are calculated by using a mechanical formulas, and a finite element model development is planned to be performed for more complex assembly of the capsule bottom structure.

  3. Formulation parameters affecting the performance of coated gelatin capsules with pulsatile release profiles.

    Science.gov (United States)

    Bussemer, T; Bodmeier, R

    2003-11-28

    The objective of this study was to develop and evaluate a rupturable pulsatile drug delivery system based on soft gelatin capsules with or without a swelling layer and an external water-insoluble but -permeable polymer coating, which released the drug after a lag time (rupturing of the external polymer coating). The swelling of the gelatin capsule itself was insufficient to rupture the external polymer coating, an additional swelling layer was applied between the capsule and the polymer coating. Croscarmellose sodium (Ac-Di-Sol) was more effective as a swelling agent than low and high molecular weight hydroxypropylmethyl cellulose (HPMC; E5 or K100M). Brittle polymers, such as ethyl cellulose (EC) and cellulose acetate propionate (CAPr), led to a better rupturing and therefore more complete drug release than the flexible polymer coating, Eudragit RS. The lag time of the release system increased with higher polymer coating levels and decreased with the addition of a hydrophilic pore-former, HPMC E5 and also with an increasing amount of the intermediate swelling layer. The water uptake of the capsules was linear until rupture and was higher with CAPr than with EC. Soft gelatin capsule-based systems showed shorter lag times compared to hard gelatin capsules because of the higher hardness/filling state of the soft gelatin capsules. The swelling pressure was therefore more directed to the external polymer coating with the soft gelatin capsules. Typical pulsatile drug release profiles were obtained at lower polymer coating levels, while the release was slower and incomplete at the higher coating levels. CAPr-coated capsules resulted in a more complete release than EC-coated capsules.

  4. Numerical Studies of the Effects of Water Capsules on Self-Healing Efficiency and Mechanical Properties in Cementitious Materials

    Directory of Open Access Journals (Sweden)

    Haoliang Huang

    2016-01-01

    Full Text Available In this research, self-healing due to further hydration of unhydrated cement particles is taken as an example for investigating the effects of capsules on the self-healing efficiency and mechanical properties of cementitious materials. The efficiency of supply of water by using capsules as a function of capsule dosages and sizes was determined numerically. By knowing the amount of water supplied via capsules, the efficiency of self-healing due to further hydration of unhydrated cement was quantified. In addition, the impact of capsules on mechanical properties was investigated numerically. The amount of released water increases with the dosage of capsules at different slops as the size of capsules varies. Concerning the best efficiency of self-healing, the optimizing size of capsules is 6.5 mm for capsule dosages of 3%, 5%, and 7%, respectively. Both elastic modulus and tensile strength of cementitious materials decrease with the increase of capsule. The decreasing tendency of tensile strength is larger than that of elastic modulus. However, it was found that the increase of positive effect (the capacity of inducing self-healing of capsules is larger than that of negative effects (decreasing mechanical properties when the dosage of capsules increases.

  5. Kingella kingae Expresses Four Structurally Distinct Polysaccharide Capsules That Differ in Their Correlation with Invasive Disease

    Science.gov (United States)

    Porsch, Eric A.; Seed, Patrick C.; Heiss, Christian; Naran, Radnaa; Amit, Uri; Yagupsky, Pablo; Azadi, Parastoo; St. Geme, Joseph W.

    2016-01-01

    Kingella kingae is an encapsulated gram-negative organism that is a common cause of osteoarticular infections in young children. In earlier work, we identified a glycosyltransferase gene called csaA that is necessary for synthesis of the [3)-β-GalpNAc-(1→5)-β-Kdop-(2→] polysaccharide capsule (type a) in K. kingae strain 269–492. In the current study, we analyzed a large collection of invasive and carrier isolates from Israel and found that csaA was present in only 47% of the isolates. Further examination of this collection using primers based on the sequence that flanks csaA revealed three additional gene clusters (designated the csb, csc, and csd loci), all encoding predicted glycosyltransferases. The csb locus contains the csbA, csbB, and csbC genes and is associated with a capsule that is a polymer of [6)-α-GlcpNAc-(1→5)-β-(8-OAc)Kdop-(2→] (type b). The csc locus contains the cscA, cscB, and cscC genes and is associated with a capsule that is a polymer of [3)-β-Ribf-(1→2)-β-Ribf-(1→2)-β-Ribf-(1→4)-β-Kdop-(2→] (type c). The csd locus contains the csdA, csdB, and csdC genes and is associated with a capsule that is a polymer of [P-(O→3)[β-Galp-(1→4)]-β-GlcpNAc-(1→3)-α-GlcpNAc-1-] (type d). Introduction of the csa, csb, csc, and csd loci into strain KK01Δcsa, a strain 269–492 derivative that lacks the native csaA gene, was sufficient to produce the type a capsule, type b capsule, type c capsule, and type d capsule, respectively, indicating that these loci are solely responsible for determining capsule type in K. kingae. Further analysis demonstrated that 96% of the invasive isolates express either the type a or type b capsule and that a disproportionate percentage of carrier isolates express the type c or type d capsule. These results establish that there are at least four structurally distinct K. kingae capsule types and suggest that capsule type plays an important role in promoting K. kingae invasive disease. PMID:27760194

  6. Abort System Using Supersonic Aerodynamic Interaction for Capsule-Type Space Transportation System

    Science.gov (United States)

    小澤, 啓伺; 北村, 圭一; 花井, 勝祥; 三好, 理也; 森, 浩一; 中村, 佳朗

    The space transportation system using capsule/rocket configurations such as Apollo and Soyuz are simple compared with Space Shuttle, and have several merits from the viewpoint of reliability. The capsule/rocket system will take over the Space Shuttle, after it retires in 2010. As the Space Shuttle accidents had been caused by several factors, e.g., aerodynamic interaction of shock waves ahead of its wing, advanced abort systems such as LAS (Launch Abort System) are required for the capsule/rocket system. In the present study, as a baseline configuration, a combination of a cone and a cylinder is employed as a CEV (Crew Exploration Vehicle), which consists of a capsule (LAV: Launch Abort Vehicle) and a rocket (SM: Service Module). By changing the relative position of the two components as well as the profile area of the rocket, their effects on the capsule/rocket aerodynamic interaction and characteristics (drag and pitching moment) are experimentally and numerically investigated at a supersonic speed (M∞ = 3.0). It is found from the results that the clearance have little effects on the flow field for the case of the baseline configuration. The capsule always showed a positive drag (CD = 0.34), which means that thrust is required to overcome the drag. Otherwise the capsule will recontact the rocket. However in the case where the rocket contact area is 2.2 times as large as the capsule profile, more favorable effects were obtained. Especially in the case of a certain clearance (h/D = 0.40), the drag coefficient of the capsule is CD = -0.35, which means that the capsule suffers a thrust force from the aerodynamic interaction. Under this condition, if capsule has a pitch angle with 5 degrees instantaneously, then pitching moment coefficient becomes CMp = -0.41 therefore capsule stabilize. However, in the case of a very small clearance (h/D ∝ 0.00), the flow becomes unsteady involving pulsating shock wave, leading to a potentially risky separation of the capsule.

  7. Computational Hypersonic Aerodynamics with Emphasis on Earth Reentry Capsules

    Directory of Open Access Journals (Sweden)

    Mihai Leonida NICULESCU

    2016-09-01

    Full Text Available The temperature in the front region of a hypersonic vehicle nose can be extremely high, for example, reaching approximately 11 000 K at a Mach number of 36 (Apollo reentry due to the bow shock wave. In this case, accurate prediction of temperature behind the shock wave is necessary in order to precisely estimate the wall heat flux. A better prediction of wall heat flux leads to smaller safety coefficient for thermal shield of space reentry vehicle; therefore, the size of thermal shield decreases and the payload could increase. However, the accurate prediction of temperature behind the bow shock wave implies the use of a precise chemical model whose partial differential equations are added to Navier-Stokes equations. This second order partial differential system is very difficult to be numerically integrated. For this reason, the present paper deals with the computational hypersonic aerodynamics with chemical reactions with the aim of supporting Earth reentry capsule design.

  8. Patch-Augmented Rotator Cuff Repair and Superior Capsule Reconstruction

    Science.gov (United States)

    Petri, M.; Greenspoon, J.A.; Moulton, S.G.; Millett, P.J.

    2016-01-01

    Background: Massive rotator cuff tears in active patients with minimal glenohumeral arthritis remain a particular challenge for the treating surgeon. Methods: A selective literature search was performed and personal surgical experiences are reported. Results: For patients with irreparable rotator cuff tears, a reverse shoulder arthroplasty or a tendon transfer are often performed. However, both procedures have rather high complication rates and debatable long-term results, particularly in younger patients. Therefore, patch-augmented rotator cuff repair or superior capsule reconstruction (SCR) have been recently developed as arthroscopically applicable treatment options, with promising biomechanical and early clinical results. Conclusion: For younger patients with irreparable rotator cuff tears wishing to avoid tendon transfers or reverse total shoulder arthroplasty, both patch-augmentation and SCR represent treatment options that may delay the need for more invasive surgery.

  9. Portable wireless power transmission system for video capsule endoscopy.

    Science.gov (United States)

    Zhiwei, Jia; Guozheng, Yan; Bingquan, Zhu

    2014-10-01

    Wireless power transmission is considered a practical way of overcoming the power shortage of wireless capsule endoscopy (VCE). However, most patients cannot tolerate the long hours of lying in a fixed transmitting coil during diagnosis. To develop a portable wireless power transmission system for VCE, a compact transmitting coil and a portable inverter circuit driven by rechargeable batteries are proposed. The couple coils, optimized considering the stability and safety conditions, are 28 turns of transmitting coil and six strands of receiving coil. The driven circuit is designed according to the portable principle. Experiments show that the integrated system could continuously supply power to a dual-head VCE for more than 8 h at a frame rate of 30 frames per second with resolution of 320 × 240. The portable VCE exhibits potential for clinical applications, but requires further improvement and tests.

  10. A portable wireless power transmission system for video capsule endoscopes.

    Science.gov (United States)

    Shi, Yu; Yan, Guozheng; Zhu, Bingquan; Liu, Gang

    2015-01-01

    Wireless power transmission (WPT) technology can solve the energy shortage problem of the video capsule endoscope (VCE) powered by button batteries, but the fixed platform limited its clinical application. This paper presents a portable WPT system for VCE. Besides portability, power transfer efficiency and stability are considered as the main indexes of optimization design of the system, which consists of the transmitting coil structure, portable control box, operating frequency, magnetic core and winding of receiving coil. Upon the above principles, the correlation parameters are measured, compared and chosen. Finally, through experiments on the platform, the methods are tested and evaluated. In the gastrointestinal tract of small pig, the VCE is supplied with sufficient energy by the WPT system, and the energy conversion efficiency is 2.8%. The video obtained is clear with a resolution of 320×240 and a frame rate of 30 frames per second. The experiments verify the feasibility of design scheme, and further improvement direction is discussed.

  11. Initial Experience of Video Capsule Endoscopy After Intestinal Transplantation

    Science.gov (United States)

    Varkey, Jonas; Oltean, Mihai; Pischel, Andreas Bernd; Simrén, Magnus; Herlenius, Gustaf

    2016-01-01

    Background Intestinal transplantation is a procedure which inflicts immunological and infectious complications that affect the transplanted graft, posing both diagnostic and therapeutic challenges. Video capsule endoscopy (VCE) offers easy access to the entire small intestine and presents itself as an interesting option. However, at present, no studies evaluating the usefulness of video capsule endoscopies in this setting have been published. Our aim was to evaluate the usefulness of VCE in detecting complications that arise after intestinal transplantation. Methods We included 7 adult patients with either isolated intestine (n = 1) or multivisceral grafts (n = 6). These patients underwent 12 VCE between 2004 and 2015 at the Sahlgrenska University Hospital. The median age was 42 (21-67) years (4 women/3 men). VCE was used in clinical situations where the conventional diagnostic methods failed to provide answers to the clinical question. Results Indications for the procedure were: suspicion of rejection (n = 4 examinations), gastrointestinal dysmotility (n = 4 examinations), high stomal output (n = 2 examinations), suspicion of lymphoproliferative disease in the transplanted graft (n = 1 examination), and clinical surveillance (n = 1 examination). The median time after transplantation for performing an examination was 740 (26-3059) days. VCE was useful in 83% of the examinations and the results influenced the planned management. The overall agreement between VCE findings and biopsies was moderate (κ = 0.54, P = 0.05) but increased when comparing the presence of inflammation/rejection (κ = 0.79, P < 0.001). Conclusions VCE is a promising diagnostic method after intestinal transplantation. However, larger studies are needed to evaluate its potential risks and gains. PMID:27990484

  12. Periprosthetic breast capsules and immunophenotypes of inflammatory cells.

    Science.gov (United States)

    Meza Britez, Maria Elsa; Caballero Llano, Carmelo; Chaux, Alcides

    2012-09-01

    BACKGROUND: Silicone gel-containing breast implants have been widely used for aesthetic and reconstructive mammoplasty. The development of a periprosthetic capsule is considered a local reparative process against the breast implant in which a variety of inflammatory cells may appear. Nevertheless, only few reports have evaluated the immunophenotypes of those inflammatory cells. Herein, we aim to provide more information in this regard evaluating 40 patients with breast implants. METHODS: We studied the immunophenotype of the inflammatory cells of capsular implants using antibodies against lymphocytes (CD3, CD4, CD8, CD20, CD45, and CD30) and histiocytes (CD68). Percentages of CD3 and CD20 positive cells were compared using the unpaired Student's t test. Fisher's test was also used to compare Baker grades by implant type, implant profile, and location and the presence of inflammatory cells by implant type. RESULTS: The associations between Baker grades and implant type and location were statistically nonsignificant (p = 0.42 in both cases). However, the use of low profile implants was significantly associated (p = 0.002) with a higher proportion of Baker grades 3 and 4. We found evidence of inflammation in 92.5 % of all implant capsules, with a statistically significant (p = 0.036) higher proportion in textured breast implants. T cells predominated over B cells. Textured implants elicited a more marked response to T cells than smooth implants, with a similar proportion of helper and cytotoxic T cells. Textured implants showed statistically significant higher percentages of CD3 positive cells than smooth implants. Percentages of CD20 positive cells were similar in textured and smooth implants. CONCLUSIONS: These results suggest that textured breast implants might induce a stronger local T cell immune response. Our findings could shed some light to understand the association of silicone breast implants and some cases of anaplastic large cell lymphomas

  13. Analysis of Wireless Capsule Endoscopy Images using Local Binary Patterns

    Directory of Open Access Journals (Sweden)

    Adriana Florentina CONSTANTINESCU

    2015-06-01

    Full Text Available Wireless capsule endoscopy, the gold standard in the screening and diagnosis of small bowel diseases, is one of the most recent investigations for gastrointestinal pathology. This examination has the advantages of being non-invasive, painless, with a large clinical yield, especially for small bowel diseases, but also some disadvantages. The long time necessary for reading and interpreting all frames acquired is one of these disadvantages. This inconvenient could be improved through different methods by using software applications. In this study we have used a software application for texture analysis based on local binary pattern (LBP operator. This operator detects and removes non-informative frames in a first step, then identifies potential lesions. Our study group consisted of 33 patients from the Gastroenterology and Hepatology Centre Craiova and from the 1st Internal Medicine and Gastroenterology Clinic from the Emergency County Hospital of Craiova. The patients included in the study have corresponded to our inclusion criteria established. The exclusion criteria were represented by the contraindications of the capsule endoscopy. In the first phase of the study, we have removed the non-informative frames from the original videos obtained, and we have acquired an average reduction of 6.96% from the total number of images. In the second phase, using the same LBP operator, we have correctly identified 93.16% of telangiectasia lesions. Our study demonstrated that software applications based on LBP operator can lead to a shorter analysis time, by reducing the overall frames number, and can also provide support in diagnosis.

  14. Capsule endoscopy: Improving transit time and image view

    Institute of Scientific and Technical Information of China (English)

    Zvi Fireman; D Paz; Y Kopelman

    2005-01-01

    AIM: To evaluate the effect of various methods of small bowel preparation on the transit time and the quality of visualization of the entire small bowel mucosa.METHODS: Ninety-five patients underwent capsule endoscopy (CE) by easily swallowing the capsule. They were divided into three study groups according to the preparation used: group A (n = 26) by polyethylene glycol (PEG) liter or with sodium phosphate (SP) 12 h prior to the CE study; group B (n = 29) by erythromycin 1 h prior to the CE study; and group C (n = 40) without any preparation. Visualization ranged from good to satisfactory to poor.RESULTS: The gastric emptying time in the group prepared with erythromycin was shorter but without statistical significance and the small bowel transit time was unaffected. In elderly subjects prepared by PEG or SP, the gastric emptying time was significantly longer (163.7 min, P = 0.05). The transit times of the three sub-groups were not affected by gender or pathology.The grade of cleaning of the entire study group was 3.27±1.1. The erythromycin group presented significantly the worst quality of images (P = 0.05) compared to the other sub-groups. Age, gender, and pathology had no effect on the quality of the cleaning of the small bowel in the sub-groups. One (1.05%) case had no natural excretion.CONCLUSION: Erythromycin markedly reduces gastric emptying time, but has a negative effect on the quality of the image in the small bowel. The preparation of elderly subjects with PEG or SP has a negative effect on the small bowel transit time.

  15. The poly-γ-d-glutamic acid capsule surrogate of the Bacillus anthracis capsule induces nitric oxide production via the platelet activating factor receptor signaling pathway.

    Science.gov (United States)

    Lee, Hae-Ri; Jeon, Jun Ho; Park, Ok-Kyu; Chun, Jeong-Hoon; Park, Jungchan; Rhie, Gi-Eun

    2015-12-01

    The poly-γ-d-glutamic acid (PGA) capsule, a major virulence factor of Bacillus anthracis, confers protection of the bacillus from phagocytosis and allows its unimpeded growth in the host. PGA capsules released from B. anthracis are associated with lethal toxin in the blood of experimentally infected animals and enhance the cytotoxic effect of lethal toxin on macrophages. In addition, PGA capsule itself activates macrophages and dendritic cells to produce proinflammatory cytokine such as IL-1β, indicating multiple roles of PGA capsule in anthrax pathogenesis. Here we report that PGA capsule of Bacillus licheniformis, a surrogate of B. anthracis capsule, induces production of nitric oxide (NO) in RAW264.7 cells and bone marrow-derived macrophages. NO production was induced by PGA in a dose-dependent manner and was markedly reduced by inhibitors of inducible NO synthase (iNOS), suggesting iNOS-dependent production of NO. Induction of NO production by PGA was not observed in macrophages from TLR2-deficient mice and was also substantially inhibited in RAW264.7 cells by pretreatment of TLR2 blocking antibody. Subsequently, the downstream signaling events such as ERK, JNK and p38 of MAPK pathways as well as NF-κB activation were required for PGA-induced NO production. In addition, the induced NO production was significantly suppressed by treatment with antagonists of platelet activating factor receptor (PAFR) or PAFR siRNA, and mediated through PAFR/Jak2/STAT-1 signaling pathway. These findings suggest that PGA capsule induces NO production in macrophages by triggering both TLR2 and PAFR signaling pathways which lead to activation of NF-kB and STAT-1, respectively.

  16. Fibrous capsule formation of the peritoneal catheter tip in ventriculoperitoneal shunt: Two case reports

    Directory of Open Access Journals (Sweden)

    Tomoaki Kano

    2014-01-01

    Full Text Available Background: A fibrous capsule formation of a peritoneal catheter tip has not previously been researched as a complication of ventriculoperitoneal (VP shunts. Case Description: Two adult patients who had undergone a VP shunt for communicative hydrocephalus following subarachnoid hemorrhage caused by a ruptured aneurysm have been identified with malfunction of the VP shunt system by mild disturbance of consciousness and gait disturbance or loss of appetite. Hydrocephalus was diagnosed by computed tomography and the obstruction of the peritoneal catheter was revealed by shuntgraphy. Laparoscopy was performed and the peritoneal catheter tips were obstructed by fibrous white capsules that covered them. One was a thin membranous capsule like a stocking with two small endoluminal granulomas of the peritoneal catheter, and other one was a fibrous glossy white capsule like a sock. These fibrous capsules were excised by laparoscopy forceps without the conversion to a new peritoneal catheter. Following the procedure, the shunt functioned normally. The pathological diagnoses were peritoneum with foreign body reaction or hyalinization of membranous tissue surrounded by fibrous tissue. Conclusion: These fibrous capsules might be formed by the peritoneal reaction to cerebrospinal fluid as a foreign material. As such, a periodic medical check should be scheduled since a fibrous capsule of the peritoneal catheter tip might be formed again.

  17. Design and manufacturing of 05F-01K instrumented capsule for nuclear fuel irradiation in Hanaro

    Energy Technology Data Exchange (ETDEWEB)

    Sohn, J. M.; Shin, Y. T.; Park, S. J. (and others)

    2007-07-15

    An instrumented capsule was developed to be able to measure fuel characteristics, such as fuel temperature, internal pressure of fuel rod, fuel pellet elongation, and neutron flux, etc., during the irradiation test of nuclear fuel in Hanaro. The instrumented capsule(02F-11K) for measuring and monitoring and monitoring fuel centerline temperature and neutron flux was designed and manufactured. It was successfully irradiated in the test hole OR5 of Hanaro from March 14, 2003 to June 1, 2003 (53.84 full power days at 24 MW). In the year of 2004, 3 test fuel rods and the instrumented capsule(03F-05K) were designed and manufactured to measure fuel centerline temperature, internal pressure of fuel rod, and fuel axial deformation during irradiation test. This capsule was irradiated in the test hole OR5 of Hanaro reactor from April 26, 2004 to October 1, 2004 (59.5 EFPD at 24 {approx} 30 MW). The six typed dual instrumented fuel rods, which allow for two characteristics to be measured simultaneously in one fuel rod, have been designed and manufactured to enhance the efficiency of the irradiation test using the instrumented fuel capsule. The 05F-01K instrumented fuel capsule was designed and manufactured for a design verification test of the three dual instrumented fuel rods. The irradiation test of the 05F-01K instrumented fuel capsule will be carried out at the OR5 vertical experimental hole of Hanaro.

  18. Capsule 13C-urea breath test for the diagnosis of Helicobacter pylori infection

    Institute of Scientific and Technical Information of China (English)

    Nan-Jing Peng; Ping-I Hsu; Kwok-Hung Lai; Ren-Shyan Liu; Shui-Cheng Lee; Daw-Guey Tsay; Ching-Chu Lo; Huei-Hwa Tseng; Wen-Keui Huang; Gin-Ho Lo

    2005-01-01

    AIM: To compare the accuracy of capsule 13C-urea breath test (UBT) with conventional invasive methods for the diagnosis of Helicobacter pylori infection.METHODS: One hundred patients received CLO test,histological examination, culture and 100- or 50-mg capsule UBT for the diagnosis of Hpyloriinfection. Hpylori infection was defined as those with positive culture or positive results from both histology and CLO test.RESULTS: Both the sensitivity and specificity of the 100-mg capsule UBT (n = 50) were 100%. The sensitivity and specificity of the 50-mg capsule UBT (n = 50) were 96.4and 100%, respectively. Taken together, the accuracy of capsule UBT (n=100) was higher than that of CLO test,histology and culture (100% vs 92%, 91% and 89%,respectively; P= 0.035, 0.018 and 0.005, respectively). Our data showed that the optimal timing of sampling for 100-and 50-mg capsule UBT was 15-30 and 6-15 min, respectively.CONCLUSION: Capsule UBT has a higher accuracy compared with biopsy-based tests. It is an ideal method for the diagnosis of Hpyloriinfection.

  19. Effect of Low Dose of Mifeprostone in Capsules combined with Misoprostol on Termination of Early Pregnancy

    Institute of Scientific and Technical Information of China (English)

    黄紫蓉; 王巧风; 杜明昆; 王卫芳; 顾林金

    2001-01-01

    Objective In this double-blind randomized trial, we compare the effect of 75 mg mifeprostone in capsules on termination of early pregnancy was compared with that of 150 mg in tablets combined with misoprostol. Methods A total of 160 patients were randomly divided into two groups with 80 for each group. The capsule group was administered with mifeprostone 75 mg in capsules,placebo tablets and misoprostol 0. 6 mg. The tablet group was administered with mifeprostone 150 mg in tablets, placebo capsules and misoprostol 0. 6 mg.Results The complete abortion rate in the capsule group and in the tablet group was 98. 8% and 97. 5% respectively, with no significant difference (P> 0. 05). There were no significant differences in bleeding time after abortion, side effects, recovery of menstruation or length of menstrual period between the two groups.Conclusion The clinical effect of mifeprostone capsule is the same with that of tablet in combination with misoprostol in terminating early pregnancy, while dose and cost is lower and the side effect is smaller. Mi feprostone capsule is recommended to be widely used for terminating early pregnancy.

  20. Floating capsules containing alginate-based beads of salbutamol sulfate: In vitro-in vivo evaluations.

    Science.gov (United States)

    Malakar, Jadupati; Datta, Prabir Kumar; Purakayastha, Saikat Das; Dey, Sanjay; Nayak, Amit Kumar

    2014-03-01

    The present study deals with the development and evaluations of stomach-specific floating capsules containing salbutamol sulfate-loaded oil-entrapped alginate-based beads. Salbutamol sulfate-loaded oil-entrapped beads were prepared and capsulated within hard gelatin capsules (size 1). The effects of HPMC K4M and potato starch weight masses on drug encapsulation efficiency (DEE) of beads and cumulative drug release at 10h (R10 h) from capsules was analyzed by 3(2) factorial design. The optimization results indicate increasing of DEE in the oil-entrapped beads and decreasing R10 h from capsules with increment of HPMC K4M and potato starch weight masses. The optimized formulation showed DEE of 70.02 ± 3.16% and R10 h of 56.96 ± 2.92%. These capsules showed floatation over 6h and sustained drug release over 10h in gastric pH (1.2). In vivo X-ray imaging study of optimized floating capsules in rabbits showed stomach-specific gastroretention over a prolonged period.

  1. A disposable and multifunctional capsule for easy operation of microfluidic elastomer systems

    Science.gov (United States)

    Thorslund, Sara; Nguyen, Hugo; Läräng, Thomas; Barkefors, Irmeli; Kreuger, Johan

    2011-12-01

    The global lab-on-chip and microfluidic markets for cell-based assays have been predicted to grow considerably, as novel microfluidic systems enable cell biologists to perform in vitro experiments at an unprecedented level of experimental control. Nevertheless, microfluidic assays must, in order to compete with conventional assays, be made available at easily affordable costs, and in addition be made simple to operate for users having no previous experience with microfluidics. We have to this end developed a multifunctional microfluidic capsule that can be mass-produced at low cost in thermoplastic material. The capsule enables straightforward operation of elastomer inserts of optional design, here exemplified with insert designs for molecular gradient formation in microfluidic cell culture systems. The integrated macro-micro interface of the capsule ensures reliable connection of the elastomer fluidic structures to an external perfusion system. A separate compartment in the capsule filled with superabsorbent material is used for internal waste absorption. The capsule assembly process is made easy by integrated snap-fits, and samples within the closed capsule can be analyzed using both inverted and upright microscopes. Taken together, the capsule concept presented here could help accelerate the use of microfluidic-based biological assays in the life science sector.

  2. Fabrication of the Supplemental Surveillance Capsules to Construct the Data of High-dose Irradiation Embrittlement

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Young Ki; Maeng, Young Jae; Kim, Kyung Sik; Lim, Mi Joung; Yoo, Choon Sung; Kim, Byoung Chul [Korea Reactor Integrity Surveillance Technology, Daejeon (Korea, Republic of)

    2015-10-15

    In order to monitor the neutron irradiation embrittlement of the reactor vessel material, the surveillance program should be implemented during the reactor operation through the plant life. This surveillance program requires the surveillance capsules which contain the various test specimens, thermal monitors, and neutron dosimeters. For PWRs in Korea, total six surveillance capsules are installed before plant operation and are programmed to be withdrawn and tested periodically in accordance with the surveillance program. The surveillance capsules are typically installed in the downcomer region and are located closer to the reactor core than the vessel wall in order to get more accelerated embrittlement characteristics of the vessel material. The supplemental surveillance capsules were fabricated to obtain the data of high-dose irradiation embrittlement. All test specimens in the capsules were made with the archive material of Hanbit Units 3 and 4. The supplemental capsules were designed to have the same outside dimensions as the capsules of Hanbit Unit 1 and were installed in Hanbit Unit 1. The withdrawal schedule will be calculated.

  3. WESF cesium capsule behavior at high temperature or during thermal cycling

    Energy Technology Data Exchange (ETDEWEB)

    Tingey, G.L.; Gray, W.J.; Shippell, R.J.; Katayama, Y.B.

    1985-06-01

    Double-walled stainless steel (SS) capsules prepared for storage of radioactive /sup 137/Cs from defense waste are now being considered for use as sources for commercial irradiation. Cesium was recovered at B-plant from the high-level radioactive waste generated during processing of defense nuclear fuel. It was then purified, converted to the chloride form, and encapsulated at the Hanford Waste Encapsulation and Storage Facility (WESF). The molten cesium chloride salt was encapsulated by pouring it into the inner of two concentric SS cylinders. Each cylinder was fitted with a SS end cap that was welded in place by inert gas-tungsten arc welding. The capsule configuration and dimensions are shown in Figure 1. In a recent review of the safety of these capsules, Tingey, Wheelwright, and Lytle (1984) indicated that experimental studies were continuing to produce long-term corrosion data, to reaffirm capsule integrity during a 90-min fire where capsule temperatures reached 800/sup 0/C, to monitor mechanical properties as a function of time, and to assess the effects of thermal cycling due to periodic transfer of the capsules from a water storage pool to the air environment of an irradiator facility. This report covers results from tests that simulated the effects of the 90-min fire and from thermal cycling actual WESF cesium capsules for 3845 cycles over a period of six months. 11 refs., 39 figs., 9 tabs.

  4. Genetic organisation of the capsule transport gene region from Haemophilus paragallinarum

    Directory of Open Access Journals (Sweden)

    O. De Smidt

    2004-11-01

    Full Text Available The region involved in export of the capsule polysaccharides to the cell surface of Haemophilus paragallinarum was cloned and the genetic organisation determined. Degenerate primers designed from sequence alignment of the capsule transport genes of Haemophilus influenzae, Pasteurella multocida and Actinobacillus pleuropneumoniae were used to amplify a 2.6 kb fragment containing a segment of the H. paragallinarum capsule transport gene locus. This fragment was used as a digoxigenin labelled probe to isolate the complete H. paragallinarum capsule transport gene locus from genomic DNA. The sequence of the cloned DNA was determined and analysis revealed the presence of four genes, each showing high homology with known capsule transport genes. The four genes were designated hctA, B, C and D (for H. paragallinarum capsule transport genes and the predicted products of these genes likely encode an ATP-dependent export system responsible for transport of the capsule polysaccharides to the cell surface, possibly a member of a super family designated ABC (ATP-binding cassette transporters.

  5. X-ray drive of beryllium capsule implosions at the National Ignition Facility

    Science.gov (United States)

    Wilson, D. C.; Yi, S. A.; Simakov, A. N.; Kline, J. L.; Kyrala, G. A.; Dewald, E. L.; Tommasini, R.; Ralph, J. E.; Olson, R. E.; Strozzi, D. J.; Celliers, P. M.; Schneider, M. B.; MacPhee, A. G.; Zylstra, A. B.; Callahan, D. A.; Hurricane, O. A.; Milovich, J. L.; Hinkel, D. E.; Rygg, J. R.; Rinderknecht, H. G.; Sio, H.; Perry, T. S.; Batha, S.

    2016-05-01

    National Ignition Facility experiments with beryllium capsules have followed a path begun with “high-foot” plastic capsule implosions. Three shock timing keyhole targets, one symmetry capsule, a streaked backlit capsule, and a 2D backlit capsule were fielded before the DT layered shot. After backscatter subtraction, laser drive degradation is needed to match observed X-ray drives. VISAR measurements determined drive degradation for the picket, trough, and second pulse. Time dependence of the total Dante flux reflects degradation of the of the third laser pulse. The same drive degradation that matches Dante data for three beryllium shots matches Dante and bangtimes for plastic shots N130501 and N130812. In the picket of both Be and CH hohlraums, calculations over-estimate the x-ray flux > 1.8 keV by ∼100X, while calculating the total flux correctly. In beryllium calculations these X-rays cause an early expansion of the beryllium/fuel interface at ∼3 km/s. VISAR measurements gave only ∼0.3 km/s. The X-ray drive on the Be DT capsule was further degraded by an unplanned decrease of 9% in the total picket flux. This small change caused the fuel adiabat to rise from 1.8 to 2.3. The first NIF beryllium DT implosion achieved 29% of calculated yield, compared to CH capsules with 68% and 21%.

  6. Effects of compound amino acids capsule on the immunological function of naval servicemen

    Directory of Open Access Journals (Sweden)

    Hai-zhong ZHONG

    2012-01-01

    Full Text Available Objective  To investigate the effects of the compound amino acids capsule on the immunological function of the naval servicemen during military activity. Methods  The subjects included 100 officers and soldiers, whose Modified Fatigue Rating Scale (MFIS scores were >21 points. The participants were randomly divided into two groups, namely, the amino acids capsule group and placebo group (n=50. Under the condition of military operations, either amino acids capsule (8 kinds of essential amino acids and 11 kinds of vitamins were contained or placebo capsule was given for 14 days continuously. The humoral immune indices, i.e., IgG, IgA, IgM, and complements C3 and C4, were measured with immunoturbidimetry. The percentage of peripheral blood CD subsets was measured using flow cytometry on the first day and 14th day. Results  The levels of IgG, IgM, and complement C3 in the capsule group were significantly higher on the 14th day than on the first day (P+CD4+ T lymphocytes and CD3-CD19+ B lymphocytes in the capsule group on the 14th day were higher than those on the first day, whereas the CD3-CD56+ NK lymphocytes decreased significantly (PConclusion  Compound amino acids capsule can improve the humoral and cellular immunological function of naval servicemen.

  7. Clinical utility, safety and tolerability of capsule endoscopy in urban Southeast Asian population

    Institute of Scientific and Technical Information of China (English)

    Tiing-Leong Ang; Kwong-Ming Fock; Tay-Meng Ng; Eng-Kiong Teo; Yi-Lyn Tan

    2003-01-01

    AIM:Capsule endoscopy has demonstrated its clinical utility in the evaluation of small bowel pathology in several Western studies. In this prospective study, we aimed to determine the clinical utility, safety and tolerability of capsule endoscopy in the evaluation of suspected small bowel disease in an urban Southeast Asian population.METHODS: We used the given (M2A) capsule endoscopy system in 16 consecutive patients with suspected small bowel pathology. In 9 patients the indication was obscure gastrointestinal bleeding, while in 6 patients it was to determine the extent of small bowel involvement in Crohn's disease. One patient underwent capsule endoscopy for evaluation of chronic abdominal pain. Patient's tolerability to the procedure was evaluated by standardized questionnaires and all patients were reviewed at one week to ensure that the capsule had been excreted without any adverse events.RESULTS: Abnormal findings were present in 8 patients (50%). The cause of obscure gastrointestinal bleeding was determined in 5 out of 9 patients. Findings included 2 cases of angiodysplasia, 2 cases of jejunal ulcers and 1 case of both angiodysplasia and jejunal ulcer. One patient had small bowel erosions and foci of erythema of doubtful significance.Ileal lesions were diagnosed in 2 out of 6 patients with Crohn's disease. Capsule endoscopy was well tolerated by all patients. One patient with Crohn's disease had a complication of capsule retention due to terminal ileum stricture. The capsule eventually passed out spontaneously after 1 month.CONCLUSION: Our study, which represented the first Asian series, further confirms the diagnostic utility, safety and tolerability of wireless capsule endoscopy.

  8. Pressure Drop and Vibration Characteristics of the Capsule with the Modification of Bottom Structures

    Energy Technology Data Exchange (ETDEWEB)

    Choi, M. H.; Choo, K. N.; Cho, M. S.; Park, S. J.; Kang, Y. H.; Son, J. M.; Shin, Y. T.; Lee, D. S.; Kim, B. G

    2005-07-15

    The bottom structure of an instrumented capsule is a part which is joined at the receptacle of the flow tube in the reactor in-core. A geometrical change of the bottom structure has an effect on the pressure drop and the vibration of the capsule. The receptacle of a single channel test loop was slightly modified in March 2005, and the out-pile test to evaluate the structural integrity of the creep capsule(03S-07K) and the material capsule(04M-17U) was performed by using a single channel and a half core test loop. From the pressure drop test of the dummy fuel, we confirmed that the modified single channel test loop has an equal flow rate to the HANARO. In the case of the material capsule with the bottom structure of a solid cone shape, the optimized diameter of the bottom structure which satisfies HANARO's flow requirement(19.6 kg/s) is 71mm. The maximum peak displacement of the two capsules measured at the half core test loop is lower than 1.0mm. From the analysis results, we can confirm that the test hole will not be interfered with near the flow tubes because its displacement due to the cooling water is very small at 0.072mm. The fundamental frequency of the capsule under water is 9.64Hz. It is expected that the resonance between the capsule and the fluid flow due to the cooling water in HANARO's in-core will not occur. Also, the new bottom structure of a solid cone shape with 71mm in diameter will be applicable to the material and special capsules in the future.

  9. Shape memory alloy-based biopsy device for active locomotive intestinal capsule endoscope.

    Science.gov (United States)

    Le, Viet Ha; Hernando, Leon-Rodriguez; Lee, Cheong; Choi, Hyunchul; Jin, Zhen; Nguyen, Kim Tien; Go, Gwangjun; Ko, Seong-Young; Park, Jong-Oh; Park, Sukho

    2015-03-01

    Recently, capsule endoscopes have been used for diagnosis in digestive organs. However, because a capsule endoscope does not have a locomotive function, its use has been limited to small tubular digestive organs, such as small intestine and esophagus. To address this problem, researchers have begun studying an active locomotive intestine capsule endoscope as a medical instrument for the whole gastrointestinal tract. We have developed a capsule endoscope with a small permanent magnet that is actuated by an electromagnetic actuation system, allowing active and flexible movement in the patient's gut environment. In addition, researchers have noted the need for a biopsy function in capsule endoscope for the definitive diagnosis of digestive diseases. Therefore, this paper proposes a novel robotic biopsy device for active locomotive intestine capsule endoscope. The proposed biopsy device has a sharp blade connected with a shape memory alloy actuator. The biopsy device measuring 12 mm in diameter and 3 mm in length was integrated into our capsule endoscope prototype, where the device's sharp blade was activated and exposed by the shape memory alloy actuator. Then the electromagnetic actuation system generated a specific motion of the capsule endoscope to extract the tissue sample from the intestines. The final biopsy sample tissue had a volume of about 6 mm(3), which is a sufficient amount for a histological analysis. Consequently, we proposed the working principle of the biopsy device and conducted an in-vitro biopsy test to verify the feasibility of the biopsy device integrated into the capsule endoscope prototype using the electro-magnetic actuation system.

  10. Effects of Tang Mai Kang Capsule on Angioneurotic Lesions in Alloxan-Induced Diabetic Mice

    Institute of Scientific and Technical Information of China (English)

    李华; 王军; 高丽君; 郭永成

    2004-01-01

    The effects of Tang Mai Kang Capsule (糖脉康胶囊) on blood sugar level, gangrene of the tail-tip, pain threshold and learning and memory abilities were investigated in alloxan-induced diabetic mice. The results showed that Tang Mai Kang Capsule could significantly decrease blood sugar level and incidence rate of gangrene of the tail-tip, increase pain threshold, and strengthen learning and memory abilities, suggesting that Tang Mai Kang Capsule functions to decrease blood sugar level and improve the complicated angioneurotic lesions of diabetes.

  11. [Main progress on studies of pharmacological activities and clinical applications of Guizhi Fuling capsule].

    Science.gov (United States)

    Su, Zhen-zhen; Li, Na; Cao, Liang; Wang, Tuan-jie; Zhang, Chen-feng; Ding, Gang; Wang, Zhen-zhong; Xiao, Wei

    2015-03-01

    Guizhi Fuling capsule is a traditional Chinese medicine composed of five kinds of medicinal plants, Cinnamomi Ramulus, Poria, Moutan Cortex, Persicae Semen, and Paeoniae Radix Alba. Pharmacology studies have shown that Guizhi Fuling capsule has many activities: anti-inflammatory, analgesic, anti-tumor, regulating smooth muscle, endocrine regulation and enhancing immunity. It achieved obvious effects in the treatment of uterine fibroids, pelvic inflammatory disease, dysmenorrheal, endometriosis, ovarian cysts, breast hyperplasia and other gynecological diseases. This paper reviewed the main progress on studies of pharmacological activities and clinical applications of Guizhi Fuling capsule in recent years.

  12. Intestinal absorption of coenzyme Q(10) administered in a meal or as capsules to healthy subjects

    DEFF Research Database (Denmark)

    Weber, Christine; Bysted, Anette; Hølmer, Gunhild Kofoed

    1997-01-01

    A randomized cross-over study by supplementation with single doses of coenzyme Q(10) (30 mg/person), administered either as a meal consisting of cooked pork heart or as 30 mg coenzyme Q(10) capsules was performed to investigate the bioavailability of dietary coenzyme Q(10) in humans. The increase...... in serum coenzyme Q(10) concentration was used as an index of the absorption, and reached a maximum six hours after the ingestion of either meal or capsules. Following intake of coenzyme Q(10) capsules, the serum coenzyme Q(10) concentrations increased significantly (p...

  13. Self-healing epoxy coating containing linseed oil loaded micro capsules for steel

    Directory of Open Access Journals (Sweden)

    M. Mahmoudian

    2016-12-01

    Full Text Available Effectiveness of epoxy coatings filled with linseed oil loaded micro capsules was investigated for healing the cracks generated on steel. Micro capsules were synthesized by in-situ polymerization method. Characteristics of these micro capsules were studied by Fourier-transform infrared spectroscopy (FTIR, Thermal gravimetric analysis, Scanning electron microscopy (SEM for chemical investigation, thermal stability and surface morphology respectively. Anti-corrosion effect of prepared coating was investigated by electrochemical impedance spectroscopy (EIS. Cracks in a paint film were successfully healed when linseed oil was released from microcapsules ruptured under simulated mechanical action.Linseed oil healed area was found to prevent corrosion of the substrate.

  14. Simulations of fill tube effects on the implosion of high-foot NIF ignition capsules

    Science.gov (United States)

    Dittrich, T. R.; Hurricane, O. A.; Berzak-Hopkins, L. F.; Callahan, D. A.; Casey, D. T.; Clark, D.; Dewald, E. L.; Doeppner, T.; Haan, S. W.; Hammel, B. A.; Harte, J. A.; Hinkel, D. E.; Kozioziemski, B. J.; Kritcher, A. L.; Ma, T.; Nikroo, A.; Pak, A. E.; Parham, T. G.; Park, H.-S.; Patel, P. K.; Remington, B. A.; Salmonson, J. D.; Springer, P. T.; Weber, C. R.; Zimmerman, G. B.; Kline, J. L.

    2016-05-01

    Encouraging results have been obtained using a strong first shock during the implosion of carbon-based ablator ignition capsules. These “high-foot” implosion results show that capsule performance deviates from 1D expectations as laser power and energy are increased. A possible cause of this deviation is the disruption of the hot spot by jets originating in the capsule fill tube. Nominally, a 10 μm outside diameter glass (SiO2) fill tube is used in these implosions. Simulations indicate that a thin coating of Au on this glass tube may lessen the hotspot disruption. These results and other mitigation strategies will be presented.

  15. Status of DOE/JAERI collaborative program phase II and phase III capsules

    Energy Technology Data Exchange (ETDEWEB)

    Robertson, J.P.; Lenox, K.E. [Oak Ridge National Lab., TN (United States); Ioka, I.; Wakai, E.

    1997-04-01

    Significant progress has been made during the last year in the post-irradiation examinations (PIE) of the specimens from nine DOE ORNL/JAERI collaborative capsules and in the design and fabrication of four additional capsules. JP21, JP22, CTR-62, and CTR-63 were disassembled, JP20 tensile specimens were tested, and a variety of specimens from the RB-60J-1, 330J-1, and 400J-1 capsules were tested. Fabrication of RB-11J and 12J was completed and progress made in the matrix finalization and design of RB-10J and JP25.

  16. Capsule Ablator Inflight Performance Measurements Via Streaked Radiography Of ICF Implosions On The NIF*

    Science.gov (United States)

    Dewald, E. L.; Tommasini, R.; Mackinnon, A.; MacPhee, A.; Meezan, N.; Olson, R.; Hicks, D.; LePape, S.; Izumi, N.; Fournier, K.; Barrios, M. A.; Ross, S.; Pak, A.; Döppner, T.; Kalantar, D.; Opachich, K.; Rygg, R.; Bradley, D.; Bell, P.; Hamza, A.; Dzenitis, B.; Landen, O. L.; MacGowan, B.; LaFortune, K.; Widmayer, C.; Van Wonterghem, B.; Kilkenny, J.; Edwards, M. J.; Atherton, J.; Moses, E. I.

    2016-03-01

    Streaked 1-dimensional (slit imaging) radiography of 1.1 mm radius capsules in ignition hohlraums was recently introduced on the National Ignition Facility (NIF) and gives an inflight continuous record of capsule ablator implosion velocities, shell thickness and remaining mass in the last 3-5 ns before peak implosion time. The high quality data delivers good accuracy in implosion metrics that meets our requirements for ignition and agrees with recently introduced 2-dimensional pinhole radiography. Calculations match measured trajectory across various capsule designs and laser drives when the peak laser power is reduced by 20%. Furthermore, calculations matching measured trajectories give also good agreement in ablator shell thickness and remaining mass.

  17. Non-capsulated and capsulated Haemophilus influenzae in children with acute otitis media in Venezuela: a prospective epidemiological study

    Directory of Open Access Journals (Sweden)

    Naranjo Laura

    2012-02-01

    Full Text Available Abstract Background Non-typeable Haemophilus influenzae (NTHi and Streptococcus pneumoniae are major causes of bacterial acute otitis media (AOM. Data regarding AOM are limited in Latin America. This is the first active surveillance in a private setting in Venezuela to characterize the bacterial etiology of AOM in children Methods Between December 2008 and December 2009, 91 AOM episodes (including sporadic, recurrent and treatment failures were studied in 87 children enrolled into a medical center in Caracas, Venezuela. Middle ear fluid samples were collected either by tympanocentesis or spontaneous otorrhea swab sampling method. Standard laboratory and microbiological techniques were used to identify bacteria and test for antimicrobial resistance. The results were interpreted according to Clinical Laboratory Standards Institute (CLSI 2009 for non-meningitis isolates. All statistical analyses were performed using SAS 9.1 and Microsoft Excel (for graphical purposes. Results Overall, bacteria were cultured from 69.2% (63 of the 91 episodes; at least one pathogen (S. pneumoniae, H. influenzae, S. pyogenes or M. catarrhalis was cultured from 65.9% (60/91 of episodes. H. influenzae (55.5%; 35/63 episodes and S. pneumoniae (34.9%; 22/63 episodes were the most frequently reported bacteria. Among H. influenzae isolates, 62.9% (22/35 episodes were non-capsulated (NTHi and 31.4% (11/35 episodes were capsulated including types d, a, c and f, across all age groups. Low antibiotic resistance for H. influenzae was observed to amoxicillin/ampicillin (5.7%; 2/35 samples. NTHi was isolated in four of the six H. influenzae positive samples (66.7% from recurrent episodes. Conclusions We found H. influenzae and S. pneumoniae to be the main pathogens causing AOM in Venezuela. Pneumococcal conjugate vaccines with efficacy against these bacterial pathogens may have the potential to maximize protection against AOM.

  18. Clinical Observation on Preservation of Lens Anterior Capsule in Reduction of Complications Associated with Silicone Oil

    Institute of Scientific and Technical Information of China (English)

    Zongming Song; Yannian Hui; Lin Wang; Xiaoyan Cao; Qianying Gao

    2001-01-01

    Purpose: To observe the effect of preservation of anterior capsule on the incidence of complications associated with silicone oil. Methods: 82 patients(82 eyes) accepted trans pars plana vitrectomy(TPPV) combined with lensectomy of whom , 30 eyes with preservation of anterior capsule(PAC) and 52eyes with no preservation of anterior capsule (NPAC). Analysis of the incidence of complications associated with use of oil. Results:The incidence rate was 50.0 % in NPAC group, and 23.3 % in PAC group( P < 0. 025 ). There were seconda'y glaucoma (21. 1% ), band keratopathy ( 13.5 % ) and corneal decompensation(9.6 % ) in NPAC group, while there was none of them in PAC group. Conclusions: Preservation of anterior capsule is an eftective method to reduce the complications associated with silicone oil. Eye Science 2001; 17:39 ~ 41.

  19. Reproducibility of Wireless Capsule Endoscopy in the Investigation of Chronic Obscure Gastrointestinal Bleeding

    Directory of Open Access Journals (Sweden)

    Dimitrios Christodoulou

    2007-01-01

    Full Text Available BACKGROUND: Capsule endoscopy (CE is a valuable tool in the diagnostic evaluation of obscure gastrointestinal bleeding, but limited information is available on the reproducibility of CE findings.

  20. The Preliminary Study of Interferon-γGene Transfection to Human Tenon's Capsule Fibroblasts in Vitro#

    Institute of Scientific and Technical Information of China (English)

    Yuqing Lan; Jian Ge; Mingkai Lin; Jianliang Zheng; Huiyi Chen; Haiquan Liu; Jing Wei; Yanyan Li

    2000-01-01

    Purpose: To investigate the results of the interferon-gamma(IFN-y) gene transfer and transient expression in human Tenon's capsule fibroblast in vitro in order to find a way to gene therapy in vivo. Method: Using LipofectAMINE, IFN-γ gene was transferred in human Tenon's capsule fibroblasts with plasmid pcDNA3 IFN-y. Its mRNA transcription and protein expression were determined by RT-PCR and flow cytometry assay respectively.Result: The human Tenon's capsule fibroblasts transferred the IFN-γgene can express the IFN-γin transcription and protein level transiently.Conclusion: IFN-γ gene can be transferred successfully and expressed efficiently in human tenon's capsule fibroblast in vitro.

  1. Unreported complication of Bravo pH capsule dislodged intothe pyriform sinus

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    We report an unexpected, previously unreported complicationof Bravo pH capsule dislodgement. During BravopH testing of a 44-year-old man with gastroesophagealreflux disease, we were unable to endoscopicallyvisualize the capsule attached to the esophageal wallafter deployment. After multiple attempts to detect thecapsule, it was visualized in the left pyriform sinus. Asthere was significant risk for pulmonary dislodgement,ENT and pulmonary physicians were immediatelyconsulted to review options for safe removal. Ultimately,ENT successfully retrieved the capsule with a foreignbody removal forceps. The Bravo pH test is generallya well-tolerated diagnostic tool used to confirm thepresence of abnormal esophageal acid reflux. While fewcomplications have been reported, technical difficultiescan occur, including poor data reception, misplacement,and early dislodgement. Rarely, more serious complicationscan occur, ranging from esophageal wall traumato capsule aspiration. Gastroenterologists performingthis procedure should be aware of the low, but nontrivial,risk of complications.

  2. A study on the development of instrumented capsule for the material irradiation test

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Young Hwan; Park, J. M.; Choo, K. N.; Maeng, W. Y.; Park, D. K.; Oh, J. M.; Park, S. J.; Jung, S. H.; Park, J. S.; Kim, T. R.; Park, J. H.; Yang, S. Y.; Jun, Y. K.; Yang, S. H.

    1997-08-01

    Extensive efforts have been made to establish design and manufacturing technology for the instrumented capsule and its related system, which should be compatible with the HANARO`s characteristics. (author). 86 refs., 45 tabs., 146 figs.

  3. Biocompatible multilayer capsules engineered with a graphene oxide derivative: synthesis, characterization and cellular uptake

    Science.gov (United States)

    Del Mercato, Loretta L.; Guerra, Flora; Lazzari, Gianpiero; Nobile, Concetta; Bucci, Cecilia; Rinaldi, Rosaria

    2016-03-01

    Graphene-based capsules have strong potential for a number of applications, including drug/gene delivery, tissue engineering, sensors, catalysis and reactors. The ability to integrate graphene into carrier systems with three-dimensional (3D) geometry may open new perspectives both for fundamental tests of graphene mechanics and for novel (bio)technological applications. However, the assembly of 3D complexes from graphene or its derivatives is challenging because of its poor stability under biological conditions. In this work, we attempted to integrate a layer of graphene oxide derivative into the shell of biodegradable capsules by exploiting a facile layer-by-layer (LbL) protocol. As a first step we optimized the LbL protocol to obtain colloidal suspensions of isolated capsules embedding the graphene oxide derivative. As a following step, we investigated in detail the morphological properties of the hybrid capsules, and how the graphene oxide derivative layer influences the porosity and the robustness of the multilayer composite shells. Finally, we verified the uptake of the capsules modified with the GO derivative by two cell lines and studied their intracellular localization and biocompatibility. As compared to pristine capsules, the graphene-modified capsules possess reduced porosity, reduced shell thickness and a higher stability against osmotic pressure. They show remarkable biocompatibility towards the tested cells and long-term colloidal stability and dispersion. By combining the excellent mechanical properties of a graphene oxide derivative with the high versatility of the LbL method, robust and flexible biocompatible polymeric capsules with novel characteristics have been fabricated.Graphene-based capsules have strong potential for a number of applications, including drug/gene delivery, tissue engineering, sensors, catalysis and reactors. The ability to integrate graphene into carrier systems with three-dimensional (3D) geometry may open new perspectives

  4. Experimental Investigation of the Spiral Structure of a Magnetic Capsule Endoscope

    Directory of Open Access Journals (Sweden)

    Wanan Yang

    2016-06-01

    Full Text Available Fitting a wireless capsule endoscope (WCE with a navigation feature can maximize its functional benefits. The rotation of a spiral-type capsule can be converted to translational motion. The study investigated how the spiral structure and rotational speed affected the capsule’s translation speed. A hand-held instrument, including two permanent magnets, a stepper motor, a controller and a power supplier, were designed to generate rotational magnetic fields. The surfaces of custom-built permanent magnet rings magnetized radially were mounted in spiral lines with different lead angles and diameters, acting as mock-up capsules. The experimental results demonstrate that the rotational speed of the magnetic field and the spiral have significant effects on the translational speed of a capsule. The spiral line with a larger lead angle and the rotating magnetic field with a higher speed can change the capsule’s rotation into a translational motion more efficiently in the intestine.

  5. A hydrogel capsule as gate dielectric in flexible organic field-effect transistors

    Energy Technology Data Exchange (ETDEWEB)

    Dumitru, L. M.; Manoli, K.; Magliulo, M.; Torsi, L., E-mail: luisa.torsi@uniba.it [Department of Chemistry, University of Bari “Aldo Moro”, Via Orabona 4, Bari I-70126 (Italy); Ligonzo, T. [Department of Physics, University of Bari “Aldo Moro”, Via Orabona 4, Bari I-70126 (Italy); Palazzo, G. [Department of Chemistry, University of Bari “Aldo Moro”, Via Orabona 4, Bari I-70126 (Italy); Center of Colloid and Surface Science—CSGI—Bari Unit, Via Orabona 4, Bari I-70126 (Italy)

    2015-01-01

    A jellified alginate based capsule serves as biocompatible and biodegradable electrolyte system to gate an organic field-effect transistor fabricated on a flexible substrate. Such a system allows operating thiophene based polymer transistors below 0.5 V through an electrical double layer formed across an ion-permeable polymeric electrolyte. Moreover, biological macro-molecules such as glucose-oxidase and streptavidin can enter into the gating capsules that serve also as delivery system. An enzymatic bio-reaction is shown to take place in the capsule and preliminary results on the measurement of the electronic responses promise for low-cost, low-power, flexible electronic bio-sensing applications using capsule-gated organic field-effect transistors.

  6. Antimicrobial secondary metabolites from marine gastropod egg capsules and egg masses

    Institute of Scientific and Technical Information of China (English)

    Kaviarasan T; Siva Sankar R; Yogamoorthi A

    2012-01-01

    Marine organisms have attracted special attention in the last three decades for their ability to produce interesting pharmacological active compounds. Even though all marine organisms have the potential to produce antimicrobial secondary metabolites, the gastropod has the vital sources of secondary metabolites particularly their egg capsule which has the promising antimicrobial secondary metabolites. In the present review, we intend to focus on marine secondary metabolites from marine gastropod egg capsule. The following compounds i.e. Kabiramid C, Aplysianin E, Aplysianin A, Thisaplysianin E and Tyrian purple have been documented in egg capsule of various gastropod and most of the antimicrobial secondary metabolites have not been isolated from the egg capsule because of the odious, and complex chemical structure. Stability of the compounds is unknown.

  7. Development of a sealing process of capsules for surveillance test tubes of the vessel in nuclear power plants; Desarrollo de proceso de sellado de capsulas para probetas de vigilancia de la vasija en nucleoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Romero C, J.; Fernandez T, F.; Perez R, N.; Rocamontes A, M.; Garcia R, R. [ININ, Km 36.5 Carretera Mexico-Toluca, 52750 La Marquesa, Estado de Mexico (Mexico)

    2007-07-01

    The surveillance capsule is composed by the support, three capsules for impact test tubes, five capsules for tension test tubes and one porta dosemeters. The capsules for test tubes are of two types: rectangular capsule for Charpy test tubes and cylindrical capsule for tension test tubes. This work describes the development of the welding system to seal the capsules for test tubes that should contain helium of ultra high purity to a pressure of 1 atmosphere. (Author)

  8. Capsule endoscopy and push enteroscopy in the diagnosis of obscure gastrointestinal bleeding

    Institute of Scientific and Technical Information of China (English)

    戈之铮; 胡运彪; 萧树东

    2004-01-01

    Background In obscure gastrointestinal (GI) bleeding, it is often difficult to detect the bleeding sites located in the small bowel with conventional radiological, scintigraphic or angiographic techniques. Push enteroscopy and capsule endoscopy are currently considered to be the most effective diagnostic procedures. The aim of this study was to compare the detection rates between capsule endoscopy and push enteroscopy. Methods From May 2002 through January 2003, we prospectively examined by capsule endoscopy 39 patients with suspected small bowel diseases, in particular GI bleeding of unknown origin in Renji Hospital. Among them, 32 complained of obscure recurrent GI bleeding. Between January 1993 and October 1996, we used push enteroscopy on 36 patients who suffered from unexplained GI bleeding. All patients had prior normal results on gastroscopy, colonoscopy, small bowel barium radiography, scintigraphy and/or angiography. Results M2A capsule endoscopy disclosed abnormal small bowel findings in 26 (82%) out of 32 patients. Twenty-one of them had significant pathological findings explaining their clinical disorders. Diagnostic yield was therefore 66% (21 of 32 patients). Definite bleeding sites diagnosed by capsule endoscopy in 21 patients included angiodysplasia (8), inflammatory small-bowel (5), small-bowel polyps (4), gastrointestinal stromal tumour (2), carcinoid tumour and lipoma (1), and hemorrhagic gastritis (1). Push enteroscopy detected the definite sources of bleeding in 9 (25%) of the 36 patients. Patients with definite bleeding sources included angiodysplasias (2), leiomyosarcoma (2), leiomyoma (1), lymphoma (1), Crohn's disease (1), small-bowel polyps (1) and adenocarcinoma of ampulla (1). Suspected bleeding sources were shown by push enteroscopy in two additional patients (6%), and in other five patients (16%) by capsule endoscopy.Conclusions The present study of patients with obscure GI bleeding showed that capsule endoscopy significantly superior

  9. Real Gas: CFD Prediction Methodology Flow Physics for Entry Capsule Mission Scenarios

    Science.gov (United States)

    Deiwert, George S.

    1997-01-01

    Mission and concept studies for space exploration are described for the purpose of identifying flow physics for entry capsule mission scenarios. These studies are a necessary precursor to the development and application of CFD prediction methodology for capsule aerothermodynamics. The scope of missions considered includes manned and unmanned cislunar missions, missions to the minor planets, and missions to the major planets and other celestial objects in the solar system.

  10. Coracoid pain test: a new clinical sign of shoulder adhesive capsulitis

    OpenAIRE

    2009-01-01

    Patients with adhesive capsulitis were clinically evaluated to establish whether pain elicited by pressure on the coracoid area may be considered a pathognomonic sign of this condition. The study group included 85 patients with primary adhesive capsulitis, 465 with rotator cuff tear, 48 with calcifying tendonitis, 16 with glenohumeral arthritis, 66 with acromioclavicular arthropathy and 150 asymptomatic subjects. The test was considered positive when pain on the coracoid region was more sever...

  11. Capsule endoscopy and enteroscopy: modern modalities to investigate the small bowel in paediatrics.

    Science.gov (United States)

    Sidhu, R; Sanders, D S; McAlindon, M E; Thomson, M

    2008-02-01

    Historically the small bowel has been considered a technically difficult area to examine because of its length (3-5 metres), location and tortuosity. Capsule endoscopy and enteroscopy have revolutionised the investigation pathway of the small bowel in adults. They are now developing increasingly important roles as modalities of investigation in paediatrics. This review appraises the current literature to define the clinical indications and practical aspects of capsule endoscopy and enteroscopy that are of interest to the clinician.

  12. Using HT and DT gamma rays to diagnose mix in Omega capsule implosions

    Science.gov (United States)

    Schmitt, M. J.; Herrmann, H. W.; Kim, Y. H.; McEvoy, A. M.; Zylstra, A.; Hammel, B. A.; Sepke, S. M.; Leatherland, A.; Gales, S.

    2016-05-01

    Experimental evidence [1] indicates that shell material can be driven into the core of Omega capsule implosions on the same time scale as the initial convergent shock. It has been hypothesized that shock-generated temperatures at the fuel/shell interface in thin exploding pusher capsules diffusively drives shell material into the gas core between the time of shock passage and bang time. We propose a method to temporally resolve and observe the evolution of shell material into the capsule core as a function of fuel/shell interface temperature (which can be varied by varying the capsule shell thickness). Our proposed method uses a CD plastic capsule filled with 50/50 HT gas and diagnosed using gas Cherenkov detection (GCD) to temporally resolve both the HT “clean” and DT “mix” gamma ray burn histories. Simulations using Hydra [2] for an Omega CD-lined capsule with a sub-micron layer of the inside surface of the shell pre-mixed into a fraction of the gas region produce gamma reaction history profiles that are sensitive to the depth to which this material is mixed. An experiment to observe these differences as a function of capsule shell thickness is proposed to determine if interface mixing is consistent with thermal diffusion λii∼T2/Z2ρ at the gas/shell interface. Since hydrodynamic mixing from shell perturbations, such as the mounting stalk and glue, could complicate these types of capsule-averaged temporal measurements, simulations including their effects also have been performed showing minimal perturbation of the hot spot geometry.

  13. Facile and Scalable Synthesis of Monodispersed Spherical Capsules with a Mesoporous Shell

    KAUST Repository

    Qi, Genggeng

    2010-05-11

    Monodispersed HMSs with tunable particle size and shell thickness were successfully synthesized using relatively concentrated polystyrene latex templates and a silica precursor in a weakly basic ethanol/water mixture. The particle size of the capsules can vary from 100 nm to micrometers. These highly engineered monodispersed capsules synthesized by a facile and scalable process may find applications in drug delivery, catalysis, separationm or as biological and chemical microreactors. © 2010 American Chemical Society.

  14. The association of Matrix Gla protein isomers with calcification in capsules surrounding silicone breast implants

    OpenAIRE

    Larry W. Hunter; Lieske, John C.; Tran, Nho V.; Miller, Virginia M.

    2011-01-01

    Implanted silicone medical prostheses induce a dynamic sequence of histologic events in adjacent tissue resulting in the formation of a fibrotic peri-prosthetic capsule. In some cases, capsular calcification occurs, requiring surgical intervention. In this study we investigated capsules from silicone gel-filled breast prostheses to test the hypothesis that this calcification might be regulated by the small vitamin K-dependent protein, matrix Gla protein (MGP), a potent inhibitor of arterial c...

  15. An optimized methodology to analyze biopolymer capsules by environmental scanning electron microscopy

    Energy Technology Data Exchange (ETDEWEB)

    Conforto, Egle, E-mail: egle.conforto@univ-lr.fr [LaSIE UMR 7356 CNRS-ULR, Université de La Rochelle, UFR Sciences, Avenue Michel Crepeau, 17042 La Rochelle (France); Joguet, Nicolas [Equipe Approches Moléculaires Environnement-Santé, LIENSs, UMR 7266 CNRS-ULR, Université de La Rochelle, UFR Sciences, Avenue Michel Crepeau, 17042 La Rochelle (France); Buisson, Pierre [INNOV' IA, 4 rue Samuel Champlain, Z.I. Chef de Baie, 17000 La Rochelle (France); Vendeville, Jean-Eudes; Chaigneau, Carine [IDCAPS, filiale R and D INNOV' IA, 4 rue Samuel Champlain, Z.I. Chef de Baie, 17000 La Rochelle (France); Maugard, Thierry [Equipe Approches Moléculaires Environnement-Santé, LIENSs, UMR 7266 CNRS-ULR, Université de La Rochelle, UFR Sciences, Avenue Michel Crepeau, 17042 La Rochelle (France)

    2015-02-01

    The aim of this paper is to describe an optimized methodology to study the surface characteristics and internal structure of biopolymer capsules using scanning electron microscopy (SEM) in environmental mode. The main advantage of this methodology is that no preparation is required and, significantly, no metallic coverage is deposited on the surface of the specimen, thus preserving the original capsule shape and its surface morphology. This avoids introducing preparation artefacts which could modify the capsule surface and mask information concerning important feature like porosities or roughness. Using this method gelatin and mainly fatty coatings, difficult to be analyzed by standard SEM technique, unambiguously show fine details of their surface morphology without damage. Furthermore, chemical contrast is preserved in backscattered electron images of unprepared samples, allowing visualizing the internal organization of the capsule, the quality of the envelope, etc.… This study provides pointers on how to obtain optimal conditions for the analysis of biological or sensitive material, as this is not always studied using appropriate techniques. A reliable evaluation of the parameters used in capsule elaboration for research and industrial applications, as well as that of capsule functionality is provided by this methodology, which is essential for the technological progress in this domain. - Highlights: • We optimized a methodology using ESEM to analyze biopolymer capsules. • This methodology allows analyzing original surface samples without any preparation. • No preparation artefact are introduced which would mask important surface details. • Morphological details and chemical contrast from the original surface are preserved. • Capsule shape, volume, surface roughness and coating quality were reliably evaluated.

  16. Medical devices; gastroenterology-urology devices; classification of the colon capsule imaging system. Final order.

    Science.gov (United States)

    2014-05-16

    The Food and Drug Administration (FDA) is classifying the colon capsule imaging system into class II (special controls). The special controls that will apply to the device are identified in this order and will be part of the codified language for the colon capsule imaging system's classification. The Agency is classifying the device into class II (special controls) in order to provide a reasonable assurance of safety and effectiveness of the device.

  17. The role of capsule endoscopy after negative CT enterography in patients with obscure gastrointestinal bleeding

    Energy Technology Data Exchange (ETDEWEB)

    Heo, Hyun Mi; Park, Chan Hyuk; Lee, Jin Ha; Kim, Bo Kyung; Cheon, Jae Hee; Kim, Tae Il; Kim, Won Ho; Hong, Sung Pil [Yonsei University College of Medicine, Department of Internal Medicine and Institute of Gastroenterology, Seoul (Korea, Republic of); Lim, Joon Seok [Yonsei University College of Medicine, Department of Diagnostic Radiology, Seoul (Korea, Republic of)

    2012-06-15

    The aim of the present study was to evaluate the role of capsule endoscopy in patients with obscure gastrointestinal bleeding (OGIB) after negative computed tomographic (CT) enterography. We retrospectively included 30 patients with OGIB who received capsule endoscopy after negative CT enterography. The median age of the patients was 60 years, and 60% of patients were male. The median follow-up duration was 8 months. Overt bleeding was 60%, and occult bleeding was 40%. Based on capsule endoscopy results, a definitive diagnosis was made for 17 patients (57%): ulcer in nine patients (30%), active bleeding with no identifiable cause in five (17%), angiodysplasia in two (7%) and Dieulafoy's lesion in one (3%). Two patients with jejunal ulcers were diagnosed with Crohn's disease. Seven patients (41%) with positive capsule endoscopy received double balloon enteroscopy and two patients (12%) received steroid treatment for Crohn's disease. Patients with overt bleeding, a previous history of bleeding, or who received large amounts of blood transfusions were more likely to show positive capsule endoscopy. Capsule endoscopy showed high diagnostic yields in patients with OGIB after negative CT enterography and may help to provide further therapeutic plans for patients with OGIB and negative CT enterography. circle CT enterography has been widely used in evaluating obscure gastrointestinal bleeding (OGIB). circle Capsule endoscopy showed high diagnostic yield for OGIB after negative CT enterography. circle Negative CT enterography does not exclude important causes of small bowel bleeding. circle Most lesions missed at CT-enterography are flat and can be detected by capsule endoscopy. (orig.)

  18. A New Concept for Magnetic Capsule Colonoscopy based on an Electromagnetic System

    Directory of Open Access Journals (Sweden)

    Gioia Lucarini

    2015-03-01

    Full Text Available Traditional endoscopy based on flexible endoscopes is reliable and effective, but poorly tolerated by patients; it also requires extended training by physicians. In order to reduce the invasiveness of these procedures, wireless passive capsule endoscopy has been proposed and clinically used during the past decade. A capsule endoscope with an active locomotion mechanism is desirable for carrying out controllable interactive procedures that are normally not possible using passive devices. Due to many difficulties in embedding actuators in swallowable devices, many researchers and companies have adopted an external magnetic field actuation solution. Magnetic resonance modified systems or permanent magnets are used to manoeuvre capsules remotely; however, both these cases present some limitations: magnetic resonance systems are bulky and expensive and permanent magnets are intrinsically unstable to control, and it is impossible to switch them off. Within this framework, the authors present the design and assessment of a magnetic system for endoscopic capsules based on an electromagnetic approach. In particular, the use of a single electromagnet was proposed and investigated: magnetic attraction, locomotion forces and magnetic torques were modelled for guaranteeing the reliable navigation of the capsule and based on these specifications, an electromagnet was designed, developed and experimentally evaluated. The results demonstrated the feasibility of the proposed approach for active locomotion capsule endoscopy.

  19. Formation mechanism of highly luminescent silica capsules incorporating multiple hydrophobic quantum dots with various emission wavelengths.

    Science.gov (United States)

    Li, Chunliang; Murase, Norio

    2013-12-01

    A synthesis process was reconsidered for encapsulating hydrophobic quantum dots (QDs) into silica capsules with high photoluminescent (PL) efficiency. The process comprises three steps: silanization of QD surfaces, seed formation by assembly of the QDs, and coating of the QD seeds with a silica shell. Analysis of the encapsulation mechanism enabled this process to be adapted for application to CdSe-based core-shell QDs with various organic ligands such as oleic acid and with various emission wavelengths. Formation of the seeds is the key step in synthesizing the silica capsules, so that they have high PL efficiency. Due to the differences in QD size and in the affinity of the ligands on their surfaces, the concentration of QDs used in the synthesis must be optimized to maximize emission efficiency. Contrary to an initial assumption, several ligands remained on the QD surfaces even after the QDs were transferred from organic solution to water. This greatly affected the size and PL efficiency of the seeds. Judicious selection of the conditions for seed and silica capsule synthesis resulted in seeds with PL efficiency greater than 70% and in silica capsules encapsulating multiple CdSe/CdZnS QDs with PL efficiency as high as 41%. Silica capsules incorporating QDs with various emission peak wavelengths from green to red were also prepared. The process presented serves as a guideline for encapsulating various types of hydrophobic QDs into silica capsules for biological tagging applications.

  20. Semipermeable Capsules Wrapping a Multifunctional and Self-regulated Co-culture Microenvironment for Osteogenic Differentiation

    Science.gov (United States)

    Correia, Clara R.; Pirraco, Rogério P.; Cerqueira, Mariana T.; Marques, Alexandra P.; Reis, Rui L.; Mano, João F.

    2016-02-01

    A new concept of semipermeable reservoirs containing co-cultures of cells and supporting microparticles is presented, inspired by the multi-phenotypic cellular environment of bone. Based on the deconstruction of the “stem cell niche”, the developed capsules are designed to drive a self-regulated osteogenesis. PLLA microparticles functionalized with collagen I, and a co-culture of adipose stem (ASCs) and endothelial (ECs) cells are immobilized in spherical liquified capsules. The capsules are coated with multilayers of poly(L-lysine), alginate, and chitosan nano-assembled through layer-by-layer. Capsules encapsulating ASCs alone or in a co-culture with ECs are cultured in endothelial medium with or without osteogenic differentiation factors. Results show that osteogenesis is enhanced by the co-encapsulation, which occurs even in the absence of differentiation factors. These findings are supported by an increased ALP activity and matrix mineralization, osteopontin detection, and the up regulation of BMP-2, RUNX2 and BSP. The liquified co-capsules also act as a VEGF and BMP-2 cytokines release system. The proposed liquified capsules might be a valuable injectable self-regulated system for bone regeneration employing highly translational cell sources.

  1. Slow-release nutrient capsules for microorganism stimulation in oil remediation.

    Science.gov (United States)

    Reis, E A; Rocha-Leão, M H M; Leite, S G F

    2013-02-01

    As the concern towards environmental deterioration grows worldwide, new technological achievements become essential for all countries. Among the technologies with great potential of bioremediation is microencapsulation of active material. Several studies have investigated the use of controlled release of active materials as a way of biostimulation and supplying the nutrients necessary for the bioremediation process. In fact, as the use of microorganisms has a great potential in degrading crude oils, this work aims to use that technology and to associate it to produce controlled-release capsules of nitrogen, phosphorus, and potassium (N, P, and K) for bioremediation purposes. For the capsule formulation, polymers of sodium alginate, Capsul®, and the commercial fertilizer NPK from Sempre Verde Inc. were used. Crude oil was the only carbon source and mineral medium for microorganism growth. Controlled-release nutrient capsules, with 4 mm in diameter, made of 3.0 % alginate (w/v) and 4.0 % Capsul® (w/v) were produced. Those capsules were used in association with a microbial consortium, in a liquid phase bioremediation process, having degraded 43.6 % of the total hydrocarbon within 240 h, evidencing thus as a promising tool for hydrocarbon bioremediation.

  2. Characteristics of Photosystem II Behavior in Cotton (Gossypium hirsutum L.) Bract and Capsule Wall

    Institute of Scientific and Technical Information of China (English)

    ZHANG Ya-li; LUO Hong-hai; HU Yuan-yuan; Reto J. Strasser; ZHANG Wang-feng

    2013-01-01

    Though bract and capsule wall of boll in cotton (Gossypium hirsutum L.) have different photosynthetic capacities, the features of photosystem II (PS II) in these organs are scarce. In this paper, chlorophyll a lfuorescence emission was measured to investigate the difference in the photosynthetic apparatus of dark-acclimated (JIP-test) and light-acclimated (light-saturation pulse method) bract and capsule wall. Compared with leaves, the oxygen evolving system of non-foliar organs had lower efifciency. The pool size of PS II electron acceptor of non-foliar organs was small, and the photochemical activity of leaves was higher than that of the bract and capsule wall. In regard to the photosystem I (PS I) electron acceptor side, the pool size of end electron acceptors of leaves was larger, and the quantum yield of electron transport from QA (PS II primary plastoquinone acceptor) further than the PS I electron acceptors of leaves was higher than that of bract and capsule wall. In all green organs, the actual quantum yield of photochemistry decreased with light. The thermal dissipation fraction of light absorbed by the PS II antennae was the highest in bract and the lowest in capsule wall relative to leaves. Compared with leaves, capsule wall was characterized by less constitutive thermal dissipation and via dissipation as lfuorescence emission. These results suggested that lower PS II photochemical activity in non-foliar organs may be result from limitations at the donor side of PS II and the acceptor sides of both photosystems.

  3. An optimized methodology to analyze biopolymer capsules by environmental scanning electron microscopy.

    Science.gov (United States)

    Conforto, Egle; Joguet, Nicolas; Buisson, Pierre; Vendeville, Jean-Eudes; Chaigneau, Carine; Maugard, Thierry

    2015-02-01

    The aim of this paper is to describe an optimized methodology to study the surface characteristics and internal structure of biopolymer capsules using scanning electron microscopy (SEM) in environmental mode. The main advantage of this methodology is that no preparation is required and, significantly, no metallic coverage is deposited on the surface of the specimen, thus preserving the original capsule shape and its surface morphology. This avoids introducing preparation artefacts which could modify the capsule surface and mask information concerning important feature like porosities or roughness. Using this method gelatin and mainly fatty coatings, difficult to be analyzed by standard SEM technique, unambiguously show fine details of their surface morphology without damage. Furthermore, chemical contrast is preserved in backscattered electron images of unprepared samples, allowing visualizing the internal organization of the capsule, the quality of the envelope, etc... This study provides pointers on how to obtain optimal conditions for the analysis of biological or sensitive material, as this is not always studied using appropriate techniques. A reliable evaluation of the parameters used in capsule elaboration for research and industrial applications, as well as that of capsule functionality is provided by this methodology, which is essential for the technological progress in this domain.

  4. Capsule endoscopy in diagnosis of small bowel Crohn′s disease

    Institute of Scientific and Technical Information of China (English)

    Zhi-Zheng Ge; Yun-Biao Hu; Shu-Dong Xiao

    2004-01-01

    AIM: To evaluate the effectiveness of wireless capsule endoscopy in patients with suspected Crohn′s disease (CD)of the small bowel undetected by conventional modalities,and to determine the diagnostic yield of M2A Given Capsule.METHODS: From lay 2002 to April 2003, we prospectively examined 20 patients with suspected CD by capsule endoscopy. The patients had the following features:abdominal pain, weight loss, positive fecal occult blood test, iron deficiency anaemia, diarrhoea and fever. All the patients had normal results in small bowel series (SBS)and in upper and lower gastrointestinal endoscopy before they were examined. Mean duration of symptoms before diagnosis was 6.5 years.RESULTS: Of the 20 patients, 13 (65%) were diagnosed as CD of the small bowel according to the findings of M2A Given Capsule. The findings detected by the capsule were mucosal erosions (2 patients), aphthas (5 patients),nodularity (1 patient), large ulcers (2 patients), and ulcerated stenosis (3 patients). The distribution of the lesions was mainly in the distal part of the small bowel,and the mild degree of lesions was 54%.CONCLUSION: Wireless capsule endoscopy is effective in diagnosing patients with suspected CD undetected by conventional diagnostic methods. It can be used to detect early lesions in the small bowel of patients with CD.

  5. Off-plane motion of a non-spherical capsule in simple shear flow

    Science.gov (United States)

    Omori, Toshihiro; Ishikawa, Takuji; Imai, Yohsuke; Yamaguchi, Takami

    2012-11-01

    Dynamics of a capsule and a biological cell in fluid flow is now of great interest in chemical engineering and bioengineering. In this study, we numerically investigated the motion of a spheroid capsule in simple shear flow including a red blood cell type biconcave disk. The membrane of a capsule was modeled by a two-dimensional hyperelastic material, and its large deformation was solved by a finite element method. The motion of internal and external liquids was estimated as a Stokes flow and solved by a boundary element method. The results showed that the orientation of a spheroid capsule is variant under time reversal, though that of a rigid spheroid is invariant. The final orientation of a spheroid capsule over a long time duration tends to converge to a certain direction depending on the shear rate despite initial placement with random orientation. These results can be utilized for a particle alignment technique and form a fundamental basis of the suspension mechanics of capsules and biological cells.

  6. Capsule endoscopy in patients with cardiac pacemakers, implantable cardioverter defibrillators and left heart assist devices.

    Science.gov (United States)

    Bandorski, Dirk; Höltgen, Reinhard; Stunder, Dominik; Keuchel, Martin

    2014-01-01

    According to the recommendations of the US Food and Drug Administration and manufacturers, capsule endoscopy should not be used in patients carrying implanted cardiac devices. For this review we considered studies indexed (until 30.06.2013) in Medline [keywords: capsule endoscopy, small bowel endoscopy, cardiac pacemaker, implantable cardioverter defibrillator, interference, left heart assist device], technical information from Given Imaging and one own publication (not listed in Medline). Several in vitro and in vivo studies included patients with implanted cardiac devices who underwent capsule endoscopy. No clinically relevant interference was noticed. Initial reports on interference with a simulating device were not reproduced. Furthermore technical data of PillCam (Given Imaging) demonstrate that the maximum transmission power is below the permitted limits for cardiac devices. Hence, impairment of cardiac pacemaker, defibrillator or left ventricular heart assist device function by capsule endoscopy is not expected. However, wireless telemetry can cause dysfunction of capsule endoscopy recording. Application of capsule endoscopy is feasible and safe in patients with implanted cardiac devices such as pacemakers, cardioverter defibrillators, and left heart assist devices. Development of new technologies warrants future re-evaluation.

  7. Restoring lens capsule integrity enhances lens regeneration in New Zealand albino rabbits and cats.

    Science.gov (United States)

    Gwon, A; Gruber, L J; Mantras, C

    1993-11-01

    In studies conducted by numerous investigators for 150 years, lenses regenerated following endocapsular lens extraction in New Zealand albino rabbits have been irregular in shape, appearing primarily doughnut-shaped as a result of lack of lens growth at the site of the anterior capsulotomy and its adhesion to the posterior capsule. In the present study, we restored the lens capsule integrity by inserting a collagen patch at the time of surgery to seal the anterior capsulotomy and to improve the shape and structure of the regenerated lenses. We then filled the capsule bag with air to prevent adhesions between the anterior and posterior capsule and maintain capsule tautness and shape. Lens regeneration was first noted as early as one to two weeks. Regenerated lens filled approximately 50% of the capsule bag at two weeks and 100% by five weeks. Subsequent growth was in the anterior-posterior direction and measured by A-scan biometry. Lens thickness increased by 0.3 mm per month. The regenerated lenses were spherical with normal cortical structure and a nuclear opacity. In conclusion, restoration of lens capsular integrity with a collagen patch following endocapsular lens extraction enhanced the shape, structure, and growth rate of the regenerated lenses. In addition, lens regeneration was shown to occur in two cats.

  8. Controlled delivery of carvedilol nanosuspension from osmotic pump capsule: in vitro and in vivo evaluation.

    Science.gov (United States)

    Liu, Dandan; Yu, Shihui; Zhu, Zhihong; Lyu, Chunyang; Bai, Chunping; Ge, Huiqi; Yang, Xinggang; Pan, Weisan

    2014-11-20

    This study intended to develop a novel controlled delivery osmotic pump capsule of carvedilol nanosuspension. The capsule is assembled using a semi-permeable capsule shell with contents including nanosuspension drying powder, mannitol and Plasdone S-630. The physical characteristics of semi-permeable capsule walls were compared among different coating solutions under different temperature. The composition of the coating solution and drying temperature appeared to be important for the formation of the shells. Carvedilol nanosuspension was prepared by precipitation-ultrasonication technique and was further lyophilized. Response surface methodology was used to investigate the influence of factors on the responses. The optimized formulation displayed complete drug delivery and zero-order release rate. The TEM and particle size analysis indicated that the morphology of the resultant nanoparticle in the capsule was spherical shaped with a mean size of 252±19 nm. The in vivo test in beagle dogs demonstrated that the relative bioavailability of the novel system was 203.5% in comparison to that of the marketed preparation. The capsule successfully controlled the release of carvedilol and the fluctuation of plasma concentration was minimized. The system is a promising strategy to improve the oral bioavailability for poorly soluble drugs and preparing it into elementary osmotic pump conveniently.

  9. The method for staining of anterior lens capsule in cases with small and rigid pupils

    Directory of Open Access Journals (Sweden)

    V. Kumar

    2014-07-01

    Full Text Available Purpose: to evaluate the safety and effectiveness of proposed method for staining with trypan blue anterior lens capsule in cases with small and rigid pupils.Methods: the safety and effectiveness of the proposed method was evaluated in 169 cases having small and rigid pupils of III and IV grade. Surgical steps included: irrigation of anterior chamber with small amount of air, enough to block the pupil; irrigation of posterior chamber with little amount of dye followed by aspiration of air bubble. the excess dye came out and stained the capsule in pupillary area.Results: No difficulty was encountered in irrigating the posterior chamber with dye. Uneven staining of the capsule was noticed in 16 cases (9.5%. In 3 cases (1.8% extensive staining of iris and posterior capsule was observed. Continuous curvilinear capsulorhexis was performed successfully in 97.6% cases. In 4 cases there was radial run of the rhexis extending up to posterior capsule. Postopera- tive inflammation of 1st and 2nd degree was observed in 5.9 and 23.1% cases, which was related to unavoidable trauma to iris tissue during pupil stretching.Conclusion: the proposed method of capsule staining in cases with small and rigid pupils is safe and effective.

  10. The method for staining of anterior lens capsule in cases with small and rigid pupils

    Directory of Open Access Journals (Sweden)

    V. Kumar

    2012-01-01

    Full Text Available Purpose: to evaluate the safety and effectiveness of proposed method for staining with trypan blue anterior lens capsule in cases with small and rigid pupils.Methods: the safety and effectiveness of the proposed method was evaluated in 169 cases having small and rigid pupils of III and IV grade. Surgical steps included: irrigation of anterior chamber with small amount of air, enough to block the pupil; irrigation of posterior chamber with little amount of dye followed by aspiration of air bubble. the excess dye came out and stained the capsule in pupillary area.Results: No difficulty was encountered in irrigating the posterior chamber with dye. Uneven staining of the capsule was noticed in 16 cases (9.5%. In 3 cases (1.8% extensive staining of iris and posterior capsule was observed. Continuous curvilinear capsulorhexis was performed successfully in 97.6% cases. In 4 cases there was radial run of the rhexis extending up to posterior capsule. Postopera- tive inflammation of 1st and 2nd degree was observed in 5.9 and 23.1% cases, which was related to unavoidable trauma to iris tissue during pupil stretching.Conclusion: the proposed method of capsule staining in cases with small and rigid pupils is safe and effective.

  11. The development and advantages of beryllium capsules for the National Ignition Facility

    Energy Technology Data Exchange (ETDEWEB)

    Wilson, D.C.; Bradley, P.A.; Hoffman, N.M. [Los Alamos National Lab., NM (United States)] [and others

    1998-02-01

    Capsules with beryllium ablators have long been considered as alternatives to plastic for the National Ignition Facility laser ; now the superior performance of beryllium is becoming well substantiated. Beryllium capsules have the advantages of relative insensitivity to instability growth, low opacity, high tensile strength, and high thermal conductivity. 3-D calculation with the HYDRA code NTIS Document No. DE-96004569 (M. M. Marinak et.al. in UCRL-LR-105821-95-3) confirm 2-D LASNEX U. B. Zimmerman and W. L. Kruer, Comments Plasmas Phys. Controlled Thermonucl. Fusion, 2, 51(2975) results that particular beryllium capsule designs are several times less sensitive than the CH point design to instability growth from DT ice roughness. These capsule designs contain more ablator mass and leave some beryllium unablated at ignition. By adjusting the level of copper dopant, the unablated mass can increase or decrease, with a corresponding decrease or increase in sensitivity to perturbations. A plastic capsule with the same ablator mass as the beryllium and leaving the same unablated mass also shows this reduced perturbation sensitivity. Beryllium`s low opacity permits the creation of 250 eV capsule designs. Its high tensile strength allows it to contain DT fuel at room temperature. Its high thermal conductivity simplifies cryogenic fielding.

  12. Hollow silica capsules with well-defined asymmetric windows in the shell.

    Science.gov (United States)

    Zhao, Bo; Collinson, Maryanne M

    2012-05-15

    A straightforward and effective approach to fabricate porous silica capsules with well-defined asymmetric windows in the shell using raspberry-like templates has been developed. This process begins with the formation of a hierarchical template by chemically coupling a large polystyrene sphere to an ensemble of small, polystyrene latex spheres. The hierarchical template in conjunction with a hard templating method and spin-coating leads to silica capsules with well-defined, asymmetric pores (windows) in the outer shell. Proof-of-principle of this approach has been demonstrated using a 1500/110 nm hierarchical template. The silica capsules thus produced were characterized with scanning electron microscopy and STEM. The diameter of the capsules was ~1400 nm, and the outer opening of the windows was ~100 nm in size, consistent with the diameters of the core and satellite spheres considering the shrinkage due to the calcination. The inner opening was ~30 nm, which gives rise to an asymmetry factor, defined as the diameter of the outer window to the diameter of the inner window, of ~3. In another example, surface-bound capsules with an asymmetry factor of ~1 were made. Collectively, these windows can provide efficient pathways to connect the inside of the capsule to the outside and have potential for asymmetric diffusion and rectification.

  13. Efficacy of Qianggan capsule in treatment of non-alcoholic fatty liver disease complicated with hyperlipidemia

    Institute of Scientific and Technical Information of China (English)

    Zhi-Jun He; Meng-Xian Wang; Min-Man Ning

    2016-01-01

    Objective:To observe the clinical effects of Qianggan capsule and silibinin capsule in the treatment of non-alcoholic fatty liver disease complicated with hyperlipidemia. Methods:A total of 112 patients with non-alcoholic fatty liver disease were included in the study and divided into the control group (n=50) and the observation group (n=62). The patients in the control group were given silibinin capsule, while the patients in the observation group were given Qianggan capsule. The patients in the two groups were treated for 24 weeks. The liver/spleen CT was performed before and after treatment. BMI was measured. The liver function, serum lipid, and leptin were detected. Results:TG, LDL-C, BMI, and liver/spleen CT ratio in the observation group were significantly reduced when compared with the control group. The levels of HDL-C and adiponectin in the observation group were significantly elevated when compared with the control group. The differences of ALT, GGT, and AST after treatment between the two groups were not statistically significant. Conclusions:Qianggan capsule and silibinin capsule has an accurate efficacy and high safety in the treatment of non-alcoholic fatty liver disease complicated with hyperlipidemia.

  14. Measurement of motion detection of wireless capsule endoscope inside large intestine.

    Science.gov (United States)

    Zhou, Mingda; Bao, Guanqun; Pahlavan, Kaveh

    2014-01-01

    Wireless Capsule Endoscope (WCE) provides a noninvasive way to inspect the entire Gastrointestinal (GI) tract, including large intestine, where intestinal diseases most likely occur. As a critical component of capsule endoscopic examination, physicians need to know the precise position of the endoscopic capsule in order to identify the position of detected intestinal diseases. Knowing how the capsule moves inside the large intestine would greatly complement the existing wireless localization systems by providing the motion information. Since the most recently released WCE can take up to 6 frames per second, it's possible to estimate the movement of the capsule by processing the successive image sequence. In this paper, a computer vision based approach without utilizing any external device is proposed to estimate the motion of WCE inside the large intestine. The proposed approach estimate the displacement and rotation of the capsule by calculating entropy and mutual information between frames using Fibonacci method. The obtained results of this approach show its stability and better performance over other existing approaches of motion measurements. Meanwhile, findings of this paper lay a foundation for motion pattern of WCEs inside the large intestine, which will benefit other medical applications.

  15. Developing a 1D ``like'' performance basecamp for beryllium capsule implosions

    Science.gov (United States)

    Kline, John; Yi, Austin; Loomis, Eric; Simakov, Andrei; Kyrala, George; Wilson, Doub; Dewald, Eddie; Ralph, Joe; Strozzi, David

    2016-10-01

    Experiments with Beryllium capsules in high density gas filled targets showed little difference in performance with respect to CH or HDC capsules. The hypothesis for the lack of performance difference is attributed to poor control of symmetry based on work by Clark et al. Going forward, the goal is to develop a target design that enables better comparisons between the performance of Be capsules and other ablators, as well as with simulations. To develop a platform in which Be capsules maximize performance with respect to 1D calculations, we have increased the case-to-capsule ratio and reduced the hohlraum drive. The stability properties of beryllium are expected to be accentuated at lower radiation temperature drives compared with other ablators. Experiments have been carried out with case-to-capasule ratio of 3.1 and 4.3. Results from these experiments are being used to develop an optimized case-to-capsule ratio to achieve controllable symmetric implosions with maximum 1D like performance. This presentation will focus on how results of the experiments are used to design the next series of optimized experiments..

  16. Fabrication of hybrid graphene oxide/polyelectrolyte capsules by means of layer-by-layer assembly on erythrocyte cell templates

    Directory of Open Access Journals (Sweden)

    Joseba Irigoyen

    2015-12-01

    Full Text Available A novel and facile method was developed to produce hybrid graphene oxide (GO–polyelectrolyte (PE capsules using erythrocyte cells as templates. The capsules are easily produced through the layer-by-layer technique using alternating polyelectrolyte layers and GO sheets. The amount of GO and therefore its coverage in the resulting capsules can be tuned by adjusting the concentration of the GO dispersion during the assembly. The capsules retain the approximate shape and size of the erythrocyte template after the latter is totally removed by oxidation with NaOCl in water. The PE/GO capsules maintain their integrity and can be placed or located on other surfaces such as in a device. When the capsules are dried in air, they collapse to form a film that is approximately twice the thickness of the capsule membrane. AFM images in the present study suggest a film thickness of approx. 30 nm for the capsules in the collapsed state implying a thickness of approx. 15 nm for the layers in the collapsed capsule membrane. The polyelectrolytes used in the present study were polyallylamine hydrochloride (PAH and polystyrenesulfonate sodium salt (PSS. Capsules where characterized by transmission electron microscopy (TEM, atomic force microscopy (AFM, dynamic light scattering (DLS and Raman microscopy, the constituent layers by zeta potential and GO by TEM, XRD, and Raman and FTIR spectroscopies.

  17. Fabrication of hybrid graphene oxide/polyelectrolyte capsules by means of layer-by-layer assembly on erythrocyte cell templates.

    Science.gov (United States)

    Irigoyen, Joseba; Politakos, Nikolaos; Diamanti, Eleftheria; Rojas, Elena; Marradi, Marco; Ledezma, Raquel; Arizmendi, Layza; Rodríguez, J Alberto; Ziolo, Ronald F; Moya, Sergio E

    2015-01-01

    A novel and facile method was developed to produce hybrid graphene oxide (GO)-polyelectrolyte (PE) capsules using erythrocyte cells as templates. The capsules are easily produced through the layer-by-layer technique using alternating polyelectrolyte layers and GO sheets. The amount of GO and therefore its coverage in the resulting capsules can be tuned by adjusting the concentration of the GO dispersion during the assembly. The capsules retain the approximate shape and size of the erythrocyte template after the latter is totally removed by oxidation with NaOCl in water. The PE/GO capsules maintain their integrity and can be placed or located on other surfaces such as in a device. When the capsules are dried in air, they collapse to form a film that is approximately twice the thickness of the capsule membrane. AFM images in the present study suggest a film thickness of approx. 30 nm for the capsules in the collapsed state implying a thickness of approx. 15 nm for the layers in the collapsed capsule membrane. The polyelectrolytes used in the present study were polyallylamine hydrochloride (PAH) and polystyrenesulfonate sodium salt (PSS). Capsules where characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), dynamic light scattering (DLS) and Raman microscopy, the constituent layers by zeta potential and GO by TEM, XRD, and Raman and FTIR spectroscopies.

  18. Effect of four different intraocular lenses on posterior capsule opacification

    Institute of Scientific and Technical Information of China (English)

    Rahmi; Duman; Fatih; Karel; Pelin; ?zyol; Can; Ates

    2015-01-01

    AIM: To evaluate the impact of 4 different intraocular lenses(IOLs) on posterior capsule opacification(PCO) by comparing the neodymium: yttrium-aluminum-garnet(Nd:YAG) laser capsulotomy rates.METHODS: This retrospective study included 4970 eyes of 4013 cataract patients who underwent phacoemulsification and IOL implantation between January 2000 and January 2008 by the same surgeon at one clinic. Four different IOLs were assessed. The outcome parameter was the incidence of Nd:YAG laser posterior capsulotomies.· RESULTS: An Nd:YAG laser posterior capsulotomy was performed in 153(3.07%) of the 4970 eyes. The mean follow-up time was 84 mo for all of the IOL groups. The percentage of eyes developing PCO was significantly greater for the acrylic hydrophilic IOLs than for the hydrophobic IOLs, although eyes with acrylic hydrophilic IOLs did not require Nd:YAG laser capsulotomy as soon as eyes with acrylic hydrophobic IOLs. There was no difference between the long-term PCO rates when 1-and 3-piece acrylic hydrophobic IOLs were compared or when IOLs made of the same material but with different haptic angles were compared.· CONCLUSION: In this study, eyes with acrylic hydrophilic IOLs were more likely to develop PCO than those with acrylic hydrophobic IOLs. The lens design(1-piece versus 3-piece and varying haptic angles) did not affect the PCO rate.

  19. Silicon-Class Ablators for NIC Ignition Capsules

    Science.gov (United States)

    Ho, Darwin; Salmonson, Jay; Haan, Steve

    2012-10-01

    We present design studies using silicon-class ablators (i.e., Si, SiC, SiB6, and SiB14) for NIC ignition capsules. These types of ablators have several advantages in that they: (a) require no internal dopant layers and are robust to M-band radiation; (b) have smooth outer surfaces; (c) have stable fuel-ablator interface; and (d) have good 1-D performance. The major disadvantage for some of the ablators in this class is the relatively smaller ablation stabilization. Consequently, the ablator is more susceptible to breakup caused by RT instabilities. However, smoother outer surfaces on this class of ablators can reduce the effect of RT instabilities. 2-D simulations of SiC ablators show ignition failure despite smooth surfaces and good 1-D performance. But SiB6 and SiB14 ablators exhibit promising behaviors. SiB6 (SiB14) ablators have high 1-D ignition margin and high peak core hydrodynamic pressure 880 (900) Gbar. The ablation scale length for SiB6 is longer than that for SiC and for SiB14 is comparable to that of plastic. Therefore, we expect acceptable performance for SiB6 and less RT growth for SiB14. 2-D simulations are now in progress.

  20. Esomeprazole tablet vs omeprazole capsule in treating erosive esophagitis

    Institute of Scientific and Technical Information of China (English)

    Chih-Yen Chen; Ching-Liang Lu; Jiing-Chyuan Luo; Full-Young Chang; Shou-Dong Lee; Yung-Ling Lai

    2005-01-01

    AIM: Esomeprazole, an oral S-form of omeprazole, has been a greater acid inhibitor over omeprazole in treating acid-related diseases. Only less published data is available to confirm its efficacy for Asian people. Therefore, a perspective, double-blind, randomizedcomparison of esomeprazole tablets 40 mg (Nexium (R)) vs omeprazole capsules 20 mg (Losec(R)) in treating Chinese subjects with erosive/ulcerative reflux esophagitis (EE) was conducted.METHODS: A total of 48 EE patients were enrolled and randomized into two treatment groups under 8-wk therapy: 25 receiving esomeprazole, while another 23 receiving omeprazole treatment. Finally, 44 completed the whole 8-wk therapy. RESULTS: The difference in healing EE between two groups was 22.7% (72.7% vs 50.0%), not reaching significant value (P = 0.204). The median of the first time needed in relieving heartburn sensation was 1 d for both groups and the remission rates for heartburn on the 1st d after treatment were 77.3% and 65%,respectively (NS). The scores of various reflux relieving symptoms evaluated either by patients or by investigators were not different. Regarding drug safety, 28% of esomeprazole group and 26.1% of omeprazole groupreported at least one episode of adverse effects, while constipation and skin dryness were the common side effects in both groups (NS). CONCLUSION: Esomeprazole 40 mg is an effective and safe drug at least comparable to omeprazole in treating Chinese EE patients.

  1. Small sized slip-ring capsule endurance testing

    Science.gov (United States)

    Mondier, Jean-Bernard

    2005-07-01

    Slip-ring capsules are mechanical units used to carry electrical signals or power currents through a rotating joint. They are used either in solar array drive mechanisms (SADM) or in scientific instruments like radiometers. Analyses of the latest missions show that the slip-rings requirements are more and more demanding. For example, the number of in-orbit mechanical cycles keeps increasing. As a result, a signal slip-ring technology, which had been successfully tested for a given need, now has to improve its performances. It was therefore interesting to try to reach the slip-rings technical limits by testing them beyond the required performance of already known space missions. Slip-rings units are currently used in mechanisms such as SADM for the CNES Proteus and Myriade satellite family. They can be also found in the payload instruments of the Megha-Tropiques satellite project, namely Madras and Scarab. A selected hardware was tested at the mechanism endurance laboratory of the CNES, in Toulouse. The typical in-orbit rotation speed was increased in order to limit the test duration to 2 years. The main interest of this work was to provide a continuous slip-ring performance status and a large set of engineering data. The main test results are presented and discussed. The following lines also report a part of the hardware detailed inspection and the lessons learned.

  2. The relationship between biofilm formations and capsule in Haemophilus influenzae.

    Science.gov (United States)

    Qin, Liang; Kida, Yutaka; Ishiwada, Naruhiko; Ohkusu, Kiyofumi; Kaji, Chiharu; Sakai, Yoshiro; Watanabe, Kiwao; Furumoto, Akitsugu; Ichinose, Akitoyo; Watanabe, Hiroshi

    2014-03-01

    To evaluate the biofilm formation of non-typeable Haemophilus influenzae (NTHi) and H. influenzae type b (Hib) clinical isolates, we conducted the following study. Serotyping and polymerase chain reaction were performed to identify β-lactamase-negative ampicillin (ABPC)-susceptible (BLNAS), β-lactamase-negative ABPC-resistant (BLNAR), TEM-1 type β-lactamase-producing ABPC-resistant (BLPAR)-NTHi, and Hib. Biofilm formation was investigated by microtiter biofilm assay, as well as visually observation with a scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM) in a continuous-flow chamber. As a result, totally 99 strains were investigated, and were classified into 4 groups which were 26 gBLNAS, 22 gBLNAR, 28 gBLPAR-NTHi and 23 Hib strains. The mean OD600 in the microtiter biofilm assay of gBLNAS, gBLNAR, gBLPAR-NTHi, and Hib strains were 0.57, 0.50, 0.34, and 0.08, respectively. NTHi strains were similar in terms of biofilm formations, which were observed by SEM and CLSM. Five Hib strains with the alternated type b cap loci showed significantly increased biofilm production than the other Hib strains. In conclusion, gBLNAS, gBLNAR, and gBLPAR-NTHi strains were more capable to produce biofilms compared to Hib strains. Our data suggested that resistant status may not be a key factor but capsule seemed to play an important role in H. influenzae biofilm formation.

  3. A New Theory of Mix in Omega Capsule Implosions

    Science.gov (United States)

    Knoll, Dana; Chacon, Luis; Rauenzahn, Rick; Simakov, Andrei; Taitano, William; Welser-Sherrill, Leslie

    2014-10-01

    We put forth a new mix model that relies on the development of a charge-separation electrostatic double-layer at the fuel-pusher interface early in the implosion of an Omega plastic ablator capsule. The model predicts a sizable pusher mix (several atom %) into the fuel. The expected magnitude of the double-layer field is consistent with recent radial electric field measurements in Omega plastic ablator implosions. Our theory relies on two distinct physics mechanisms. First, and prior to shock breakout, the formation of a double layer at the fuel-pusher interface due to fast preheat-driven ionization. The double-layer electric field structure accelerates pusher ions fairly deep into the fuel. Second, after the double-layer mix has occurred, the inward-directed fuel velocity and temperature gradients behind the converging shock transports these pusher ions inward. We first discuss the foundations of this new mix theory. Next, we discuss our interpretation of the radial electric field measurements on Omega implosions. Then we discuss the second mechanism that is responsible for transporting the pusher material, already mixed via the double-layer deep into the fuel, on the shock convergence time scale. Finally we make a connection to recent mix motivated experimental data on. This work conducted under the auspices of the National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory, managed by LANS, LLC under Contract DE-AC52-06NA25396.

  4. Photo-triggered release in polyamide nanosized capsules

    Energy Technology Data Exchange (ETDEWEB)

    Marturano, V.; Ambrogi, V. [Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Napoli (Italy); Cerruti, P. [Institute of Polymer Chemistry and Technology (ICTP-CNR), via Campi Flegrei 34, 80078 Pozzuoli (Italy); Giamberini, M.; Tylkowski, B. [University Rovira i Virgili, Department of Chemical Engineering, Av. Paisos Catalans 26, 43007 Tarragona (Spain)

    2014-05-15

    In this work, nanosized capsules based on a lightly cross-linked polyamide containing azobenzene moieties in the main chain were synthesized by miniemulsion interfacial polymerization. The obtained nanocapsules were loaded either with toluene or with the fluorescent probe coumarin-6 as a core. Diameters of the nanocapsules were in the 100-900 nm range, depending on the selected emulsion conditions. The morphology and shape of the samples were observed by TEM and SEM while the emulsion droplets and nanocapsules size was measured by DLS. Under continuous UV irradiation the polymer underwent E-Z photoisomerization allowing the release of the encapsulated material. Variation in diameter of the nanocapsules with the time of UV irradiation was detected through DLS analysis. 10-30% growth was observed, depending on the sample. The kinetics of release of coumarin-6 was followed by spectrofluorimetry in ethanol. In absence of irradiation, the fluorescence intensity appeared to be constant over time, while it increased when the sample was irradiated with 360 nm UV light.

  5. Effect of jianpiyiwei capsule on gastric precancerous lesions in rats

    Institute of Scientific and Technical Information of China (English)

    Xue-Ying Shi; Feng-Zhi Zhao; Xin Dai; Lian-Sheng Ma; Xiu-Yu Dong; Jie Fang

    2002-01-01

    AIM:To evaluate the therapeutic effect of compoundChinese drugs, Jianpiyiwei capsule (JPYW) on gastricprecancerous lesions in rats and to explore itsmechanism of action.METHODS:Model of gastric precancerous lesions wasconstructed in male Wistar rats: a metal spring wasinserted and fixed through pyloric sphincter. One weekafter recovery, each rat was given 50-60 ℃ hot pastecontainingt50 g/L NaCl 2 mL orally, twice a week for15 weeks.Then 10 normal and 11 model rats wereanaesthetized, after the measurement of gastricmucosa blood flow (GMBF), the rats were killed andthe mucosal hexosamines and malonic dialdehyde(MDA) were measured. The morphological changes ofgastric mucosa were observed macroscopically andmicroscopically, and by an automatic imaging analysissystem. Other rats were treated with JPYW 1.5 g/kg.d-1or 4.5 g/kg@d-1, or distilled water as negative controlrespectively (n=-10 in each group). After 12 weeks, allthe rats were examined as above.RESULTS: The gastric mucosa of model rats showedchronic atrophic gastritis with dysplasia and intestinalmetaplasia (IM), GMBF and hexosamine content werereduced significantly and MDA was increased ascompared to the normal group (P<0.01). After 12 weekstreatment, the pathological changes of the negativecontrol group became worsened, while in JPYW treatedgroups the changes were modified with significantincrease of GMBF and reduction of MDA, although thehexosamine concentration increased only mildly.CONCLUSION: JPYW increases GMBF and reduces MDAcontent in gastric mucosa and has therapeutic effectson gastric precancerous lesions.

  6. Thin Shell Model for NIF capsule stagnation studies

    Science.gov (United States)

    Hammer, J. H.; Buchoff, M.; Brandon, S.; Field, J. E.; Gaffney, J.; Kritcher, A.; Nora, R. C.; Peterson, J. L.; Spears, B.; Springer, P. T.

    2015-11-01

    We adapt the thin shell model of Ott et al. to asymmetric ICF capsule implosions on NIF. Through much of an implosion, the shell aspect ratio is large so the thin shell approximation is well satisfied. Asymmetric pressure drive is applied using an analytic form for ablation pressure as a function of the x-ray flux, as well as time-dependent 3D drive asymmetry from hohlraum calculations. Since deviations from a sphere are small through peak velocity, we linearize the equations, decompose them by spherical harmonics and solve ODE's for the coefficients. The model gives the shell position, velocity and areal mass variations at the time of peak velocity, near 250 microns radius. The variables are used to initialize 3D rad-hydro calculations with the HYDRA and ARES codes. At link time the cold fuel shell and ablator are each characterized by a density, adiabat and mass. The thickness, position and velocity of each point are taken from the thin shell model. The interior of the shell is filled with a uniform gas density and temperature consistent with the 3/2PV energy found from 1D rad-hydro calculations. 3D linked simulations compare favorably with integrated simulations of the entire implosion. Through generating synthetic diagnostic data, the model offers a method for quickly testing hypothetical sources of asymmetry and comparing with experiment. Prepared by LLNL under Contract DE-AC52-07NA27344.

  7. Yangjing Capsule Ameliorates Spermatogenesis in Male Mice Exposed to Cyclophosphamide

    Directory of Open Access Journals (Sweden)

    Hongle Zhao

    2015-01-01

    Full Text Available Yangjing capsule (YC, a traditional Chinese compound herbal preparation, has been proven as an effective drug to improve spermatogenesis in clinical practice. However, its pharmacological mechanisms were not fully clarified. This study was designed to investigate the protective effects of YC on spermatogenesis in the mouse model of spermatogenesis dysfunction induced by cyclophosphamide (CP. The administration of YC significantly increased the epididymal index, sperm count, and sperm motility of model mice. Histopathological changes demonstrated that CP caused obvious structural damage to testis, which were reversed by the administration of YC. Results from TUNEL assay showed that treatment with YC dramatically decreased the apoptosis of spermatogenic cell induced by CP. Moreover, YC treatment could inhibit the mRNA and protein expression of Bax to Bcl-2 and also raised expression of AR at both mRNA and protein levels. These data suggest that YC might ameliorate spermatogenesis in male mice exposed to CP through inhibiting the apoptosis of spermatogenic cell and enhancing the actions of testosterone in spermatogenesis.

  8. Effects of process variables on the encapsulation of oil in ca-alginate capsules using an inverse gelation technique.

    Science.gov (United States)

    Abang, Sariah; Chan, Eng-Seng; Poncelet, Denis

    2012-01-01

    The objective of this study was to investigate the effects of process variables on the encapsulation of oil in a calcium alginate membrane using an inverse gelation technique. A dispersion of calcium chloride solution in sunflower oil (water-in-oil emulsion) was added dropwise to the alginate solution. The migration of calcium ions to the alginate solution initiates the formation of a ca-alginate membrane around the emulsion droplets. The membrane thickness of wet capsules and the elastic modulus of dry capsules increased following first-order kinetics with an increasing curing time. An increase in the calcium chloride concentration increased the membrane thickness of wet capsules and the elastic modulus of dry capsules. An increase in the alginate concentration decreased the mean diameter of wet capsules but increased the elastic modulus of dry capsules.

  9. Proposed pushered single shell capsule design for the investigation of mid/high Z mix on the NIF

    Science.gov (United States)

    Sacks, Ryan; Tipton, Robert; Graziani, Frank

    2016-05-01

    The CD Mix campaign has given a detailed explination of the mix mechanics in the current ignition capsule designs by investigating the relationship between material mixing, shell-fuel interfaces, and the change in thermonuclear yield given a deuterated layer in the capsule. Alternative ignition scenarios include the use of double shell designs that incorporate high-Z material in the capsule. Simulations are conducted on a proposed capsule platform using the ARES code on a scaled capsule design using a partially reduced glass capsule design. This allows for the inclusion of deuterium on the inner surface of the pusher layer similar to the CD mix experiments. The presence of silicon dioxide allows for the investigation of the influence of higher Z material on the mixing characteristics.

  10. The Importance of Alternative Diagnostic Modalities in the Diagnosis of Small Bowel Tumors After a Negative Capsule Endoscopy

    Directory of Open Access Journals (Sweden)

    Iolanda Ribeiro

    2015-05-01

    We report the case of a patient with overt obscure gastrointestinal bleeding due to a gastrointestinal stromal tumor diagnosed by CT enterography after two negatives capsule endoscopies. This case shows that capsule endoscopy may overlook significant life threatening lesions and highlights the importance of using other diagnostic modalities after a negative capsule endoscopy, especially in patients with a high index of suspicion for small bowel tumoral pathology or persistent/recurrent bleeding.

  11. Thermal analysis of an irradiation capsule for high-temperature materials to be used in future nuclear systems

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Man Soon; Choo, Kee Nam; Kim, Sung Ryul [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of). Dept. of Neutron Application Technology

    2016-05-15

    The requirement of irradiation of materials at high temperature are gradually increasing with the development of Gen-IV (Generation-IV) reactors, which will be operated at high temperatures and under a high neutron flux. To overcome the restrictions for the high temperature use of Al thermal media of the existing standard capsule, a new capsule was designed and fabricated. Through the irradiation test, the structural integrity and safety of the capsule during irradiation at high temperature were confirmed.

  12. Development of Naphthalene PLIF for Visualizing Ablation Products From a Space Capsule Heat Shield

    Science.gov (United States)

    Combs, C. S.; Clemens, N. T.; Danehy, P. M.

    2014-01-01

    The Orion Multi-Purpose Crew Vehicle (MPCV) will use an ablative heat shield. To better design this heat shield and others that will undergo planetary entry, an improved understanding of the ablation process would be beneficial. Here, a technique developed at The University of Texas at Austin that uses planar laser-induced fluorescence (PLIF) of a low-temperature sublimating ablator (naphthalene) to enable visualization of the ablation products in a hypersonic flow is applied. Although high-temperature ablation is difficult and expensive to recreate in a laboratory environment, low-temperature sublimation creates a limited physics problem that can be used to explore ablation-product transport in a hypersonic flow-field. In the current work, a subscale capsule reentry vehicle model with a solid naphthalene heat shield has been tested in a Mach 5 wind tunnel. The PLIF technique provides images of the spatial distribution of sublimated naphthalene in the heat-shield boundary layer, separated shear layer, and backshell recirculation region. Visualizations of the capsule shear layer using both naphthalene PLIF and Schlieren imaging compared favorably. PLIF images have shown high concentrations of naphthalene in the capsule separated flow region, intermittent turbulent structures on the heat shield surface, and interesting details of the capsule shear layer structure. It was shown that, in general, the capsule shear layer appears to be more unsteady at lower angels of attack. The PLIF images demonstrated that during a wind tunnel run, as the model heated up, the rate of naphthalene ablation increased, since the PLIF signal increased steadily over the course of a run. Additionally, the shear layer became increasingly unsteady over the course of a wind tunnel run, likely because of increased surface roughness but also possibly because of the increased blowing. Regions with a relatively low concentration of naphthalene were also identified in the capsule backshell

  13. Structure and selectivity trends in crystalline urea-functionalized anion-binding capsules

    Energy Technology Data Exchange (ETDEWEB)

    Rajbanshi, Arbin [Oak Ridge National Laboratory (ORNL); Custelcean, Radu [ORNL

    2012-01-01

    A tripodal trisurea receptor (L1) persistently self-assembles with various divalent oxoanion salts M{sub n}X (M = Na, K, Mg, Ca, Cd; X = SO{sub 4}{sup 2-}, SO{sub 3}{sup 2-}, SeO{sub 4}{sup 2-}, CrO{sub 4}{sup 2-}) into isomorphous series of crystalline frameworks in three different compositions: MX(L1){sub 2}(H{sub 2}O){sub 6} (M = Mg, Ca, Cd) (1), Na{sub 2}X(L1){sub 2}(H{sub 2}O){sub 4} (2) and K{sub 2}X(L1){sub 2}(H{sub 2}O){sub 2} (3). Single-crystal X-ray structural analysis revealed that all three series of structures adopt a NaCl-type topology, consisting of alternating anionic X(L1){sub 2}{sup 2-} capsules and M(H{sub 2}O){sub 6}{sup 2+}, Na{sub 2}(H{sub 2}O){sub 4}{sup 2+} or K{sub 2}(H{sub 2}O){sub 2}{sup 2+} hydrated cations. The capsules provide a complementary environment to tetrahedral oxoanions via 12 hydrogen bonds from six urea groups lining the cavities of the capsules. The persistent formation of the capsules facilitated the investigation of structural trends and structure-selectivity relationships across series 1-3. First, it was found that the size of the capsules is relatively unresponsive to the change in the encapsulated anion, resulting in good shape and size recognition in the separation of anions by competitive crystallizations. Second, it was found that the size of the capsules varies linearly with the size of the external cation, which provides a way for tuning the anion encapsulation selectivity. However, no straightforward dependence was found between the size of the capsules and the relative selectivity for different-sized tetrahedral oxoanions in competitive crystallizations.

  14. Fabrication of Single Crystal MgO Capsules

    Science.gov (United States)

    Danielson, Lisa

    2012-01-01

    A method has been developed for machining MgO crystal blocks into forms for containing metallic and silicate liquids at temperatures up to 2,400 C, and pressures up to at least 320 kilobars. Possible custom shapes include tubes, rods, insulators, capsules, and guides. Key differences in this innovative method include drilling along the crystallographic zone axes, use of a vibration minimizing material to secure the workpiece, and constant flushing of material swarf with a cooling medium/lubricant (water). A single crystal MgO block is cut into a section .5 mm thick, 1 cm on a side, using a low-speed saw with a 0.004 blade. The cut is made parallel to the direction of cleavage. The block may be cut to any thickness to achieve the desired length of the piece. To minimize drilling vibrations, the MgO block is mounted on a piece of adhesive putty in a vise. The putty wad cradles the bottom half of the entire block. Diamond coring tools are used to drill the MgO to the desired custom shape, with water used to wet and wash the surface of swarf. Compressed air may also be used to remove swarf during breaks in drilling. The MgO workpiece must be kept cool at all times with water. After all the swarf is rinsed off, the piece is left to dry overnight. If the workpiece is still attached to the base of the MgO block after drilling, it may be cut off by using a diamond cutoff wheel on a rotary hand tool or by using a low-speed saw.

  15. Synergistic action on hypnosia: Yinao capsules with pentobarbital sodium of threshold and sub-threshold dosages

    Institute of Scientific and Technical Information of China (English)

    Guilan Zhang; Mingsan Miao; Jingjing Shi; Yalei Yang

    2007-01-01

    BACKGROUND: Sedative and hypnotic drugs could cure insomnia in a dependent manner, and traditional Chinese medicine has some superiority in treating insomnia.OBJECTIVE: To observe the synergistic action of Yinao capsules with pentobarbital sodium in threshold and sub-threshold dosages in hypnosia and sedation.DESIGN: A completely randomized grouping design and control experiment.SETTING: Pharmacological laboratory, College of Pharmacy, Henan College of Traditional Chinese Medicine.MATERIALS: Totally 200 grade Ⅱ Kunming mice of 18 - 21 g, either male or female, were used. Yinao capsules, main ingredients of which were turtleback glue, thinleaf milkwort root, Chinese magnoliavine fruit,mythic fungus, tangshen, ginseng and grassleaf sweetflag rhizome, were offered by Chinese-American Huayi Pharmacy, Co.,Ltd. (ratified number: 040901); Kangnaoshuai capsules, main ingredients of which were prepared rehmannia root, tuber fleeceflower root, ginseng, membranous milkvetch root, thinleaf milkwort root, Fushen, grassleaf sweetflag rhizome, spine date seed, lecithin, barbary wolfberry fruit, pueraria root,vitamin E, etc., were produced by Shijiazhuang Siyao, Co.,Ltd. (ratified number: 040964); Pentobarbital sodium was produced by China Medicine (Group) Shanghai Chemical Reagent, Co,.Ltd. (Ratified number:030816). ZZ-6 mice spontaneous activity apparatus was produced by Chengdu Taimeng Science and Technology, Co.,Ltd.METHODS: The experiment was carried out in the Animal Experimental Center, Henan College of spontaneous activity of mice: Fifty mice were randomly divided into five groups with 10 mice in each group:Mice in the large, middle and small dosages of Yinao capsules groups were intragastrically infused with Yinao capsules suspension (1.36, 0.68, 0.34 g/kg); Those in the Kangnaoshuai capsules group were infused with Kangnaoshuai suspension (1.12 g/kg); Those in the control group were given physiologic saline of the same volume. The mice were administrated once a day for

  16. Capsule endoscopy retention as a helpful tool in the management of a young patient with suspected small-bowel disease

    Institute of Scientific and Technical Information of China (English)

    Chryssostomos Kalantzis; Periklis Apostolopoulos; Panagiota Mavrogiannis; Dimitrios Theodorou; Xenofon Papacharalampous; Ioannis Bramis; Nikolaos Kalantzis

    2007-01-01

    Capsule endoscopy is an easy and painless procedure permitting visualization of the entire small-bowel during its normal peristalsis. However, important problems exist concerning capsule retention in patients at risk of small bowel obstruction. The present report describes a young patient who had recurrent episodes of overt gastrointestinal bleeding of obscure origin, 18 years after small bowel resection in infancy for ileal atresia.Capsule endoscopy was performed, resulting in capsule retention in the distal small bowel. However, this event contributed to patient management by clearly identifying the site of obstruction and can be used to guide surgical intervention, where an anastomotic ulcer is identified.

  17. Feasibility of capsule endoscopy for direct imaging of drug delivery systems in the fasted upper-gastrointestinal tract

    DEFF Research Database (Denmark)

    Pedersen, Pernille Barbre; Bar-Shalom, Daniel; Baldursdottir, Stefania;

    2014-01-01

    PURPOSE: To develop a minimally-invasive method for direct visualization of drug delivery systems in the human stomach and to compare the obtained results with an established in vitro model. The method should provide the capsule rupture, dispersion characteristics, and knowledge regarding...... the surrounding physiological environment in the stomach. METHODS: A capsule endoscopic method was developed. The disintegration time, dispersion characteristics and the impact of the physiological environment on different lipid based delivery systems in different gelatin capsules in the fasted stomach of nine......-invasive capsule endoscopic method was developed for direct visualizing of drug delivery systems in the human stomach and maybe later, in the duodenum....

  18. Obscure gastrointestinal bleeding: which factors are associated with positive capsule endoscopy findings?

    Directory of Open Access Journals (Sweden)

    Iolanda Ribeiro

    Full Text Available Background: Capsule endoscopy is a first line examination to evaluate obscure gastrointestinal bleeding. The identification of factors associated with the detection of lesions by capsule endoscopy could improve resource utilization and patient selection. Objectives: To identify factors associated with positive capsule endoscopy findings in patients with obscure gastrointestinal bleeding. Methods: Retrospective, single-center study, including 203 patients (214 capsule endoscopy procedures submitted to capsule endoscopy in the setting of obscure gastrointestinal bleeding. Type of obscure gastrointestinal bleeding, number of units of packed red blood cells transfused, type of positive finding, number of endoscopy studies performed prior to capsule endoscopy, comorbidities, medication and Charlson index were evaluated. Overt bleeding was subdivided into ongoing and previous gastrointestinal bleeding. Only lesions with high hemorrhagic potential (P2 were classified as positive findings. Results: The mean age was 62.2 years and 59.7% of patients were female. Most patients were referred for occult gastrointestinal bleeding (64.5%, while 35.5% were referred for overt gastrointestinal bleeding (63.2% previous-overt gastrointestinal bleeding. The most frequent positive findings included ulcers/erosions (34% and angioectasias (32%. In univariate analysis, the identification of positive findings was significantly higher in those with ongoing-overt bleeding (p < 0.001, advanced age (p = 0.003, increasing number of pre-capsule endoscopies (p < 0.001, increasing transfusion requirements (p < 0.001, moderate/severe renal disease (p = 0.009 and antiplatelet drugs (p = 0.021 and NSAID intake (p = 0.005. In multivariate analysis, positive findings were significantly higher only in those with ongoing-overt bleeding (odds ratio [OR] 18.68, 95% confidence interval [CI] 3.98-85.6, p < 0.001, higher transfusion requirements (OR 1.23, 95% CI 1.1-1.4, p < 0.001 and NSAID

  19. Tank-treading and tumbling frequencies of capsules and red blood cells.

    Science.gov (United States)

    Yazdani, Alireza Z K; Kalluri, R Murthy; Bagchi, Prosenjit

    2011-04-01

    This study is motivated in part by the discrepancy that exists in the literature with regard to the dependence of the tank-treading frequency of red blood cells on the shear rate and suspending medium viscosity. Here we consider three-dimensional numerical simulations of deformable capsules of initially spherical and oblate spheroidal shapes and biconcave discoid representing the red blood cell resting shape. By considering a much broader range of the viscosity ratio (ratio of capsule or cell interior to suspending fluid viscosity), shear rate, and aspect ratio (ratio of minor to major axes) than that considered in the previous experiments, we find several new characteristics of the tank-treading and tumbling frequencies that have not been reported earlier. These new characteristics are the result of the large shape deformation and the coupling between shape and angular oscillations of the capsules or cells. For the spherical and oblate spheroidal capsules, the tank-treading frequency shows a nonmonotonic trend that is characterized by an initial decrease leading to a minimum followed by an increase with increasing viscosity ratio. For red blood cells, we find two regimes of the viscosity dependence of the tank-treading frequency: an exponential regime in which the tank-treading frequency decreases at a slower rate with increasing viscosity ratio, and a logarithmic range in which it decreases at a much faster rate. While this trend agrees well with different theoretical models of shape-preserving capsules, it was not evident in previous experimental results. When the shear rate dependence is considered, the tank-treading frequency of red blood cells and capsules of highly elongated initial shapes exhibits a nonmonotonic trend that is characterized by an initial increase leading to a maximum followed by a sharp decrease with decreasing shear rate. This anomalous behavior of the tank-treading frequency is shown to be due to a breathing-like dynamics of the capsule or

  20. Erosion characteristics of an erodible tablet incorporated in a time-delayed capsule device.

    Science.gov (United States)

    McConville, Jason T; Ross, Alistair C; Florence, Alastair J; Stevens, Howard N E

    2005-01-01

    A time-delayed oral drug delivery device was investigated in which an erodible tablet (ET), sealing the mouth of an insoluble capsule, controlled the lag-time prior to drug release. The time-delayed capsule (TDC) lag-time may be altered by manipulation of the excipients used in the preparation of the ET. Erosion rates and drug release profiles from TDCs were investigated with four different excipient admixtures with lactose: calcium sulphate dihydrate (CSD), dicalcium phosphate (DCP), hydroxypropylmethyl cellulose (HPMC; Methocel K100LV grade) and silicified microcrystalline cellulose (SMCC; Prosolv 90 grade). Additionally, the compressibility of different insoluble coated capsules was tested at different moisture levels to determine their overall integrity and suitability for oral delivery. Erosion rates of CSD, DCP, and SMCC displayed a nonlinear relationship to their concentration, while HPMC indicated rapid first-order erosion followed by zero-order erosion, the onset of which was dependent on the HPMC concentration. Capsule integrity was confirmed to be most suitable for oral delivery when the insoluble ethyl cellulose coat was applied to a hard gelatin capsule using an organic spray coating process. T50% drug release times varied between 245 (+/-33.4) and 393 (+/-40.8) minutes for 8% and 20% DCP, respectively, T50% release times of 91 (+/-22.1) and 167 (+/-34.6) were observed for 8% and 20% CSD; both formulations showed incidence of premature drug release. The SMCC formulations showed high variability due to lamination effects. The HPMC formulations had T50% release times of 69 (+/-13.9), 213 (+/-25.4), and 325 (+/-30.3) minutes for 15%, 24%, and 30% HPMC concentrations respectively, with no premature drug release. In conclusion, HPMC showed the highest reproducibility for a range of time-delayed drug release from the assembled capsule formulation. The method of capsule coating was confirmed to be important by investigation of the overall capsule integrity at

  1. Capsules, toxins and AtxA as virulence factors of emerging Bacillus cereus biovar anthracis.

    Science.gov (United States)

    Brézillon, Christophe; Haustant, Michel; Dupke, Susann; Corre, Jean-Philippe; Lander, Angelika; Franz, Tatjana; Monot, Marc; Couture-Tosi, Evelyne; Jouvion, Gregory; Leendertz, Fabian H; Grunow, Roland; Mock, Michèle E; Klee, Silke R; Goossens, Pierre L

    2015-04-01

    Emerging B. cereus strains that cause anthrax-like disease have been isolated in Cameroon (CA strain) and Côte d'Ivoire (CI strain). These strains are unusual, because their genomic characterisation shows that they belong to the B. cereus species, although they harbour two plasmids, pBCXO1 and pBCXO2, that are highly similar to the pXO1 and pXO2 plasmids of B. anthracis that encode the toxins and the polyglutamate capsule respectively. The virulence factors implicated in the pathogenicity of these B. cereus bv anthracis strains remain to be characterised. We tested their virulence by cutaneous and intranasal delivery in mice and guinea pigs; they were as virulent as wild-type B. anthracis. Unlike as described for pXO2-cured B. anthracis, the CA strain cured of the pBCXO2 plasmid was still highly virulent, showing the existence of other virulence factors. Indeed, these strains concomitantly expressed a hyaluronic acid (HA) capsule and the B. anthracis polyglutamate (PDGA) capsule. The HA capsule was encoded by the hasACB operon on pBCXO1, and its expression was regulated by the global transcription regulator AtxA, which controls anthrax toxins and PDGA capsule in B. anthracis. Thus, the HA and PDGA capsules and toxins were co-regulated by AtxA. We explored the respective effect of the virulence factors on colonisation and dissemination of CA within its host by constructing bioluminescent mutants. Expression of the HA capsule by itself led to local multiplication and, during intranasal infection, to local dissemination to the adjacent brain tissue. Co-expression of either toxins or PDGA capsule with HA capsule enabled systemic dissemination, thus providing a clear evolutionary advantage. Protection against infection by B. cereus bv anthracis required the same vaccination formulation as that used against B. anthracis. Thus, these strains, at the frontier between B. anthracis and B. cereus, provide insight into how the monomorphic B. anthracis may have emerged.

  2. Thermal Analysis of a Dry Storage Concept for Capsule Dry Storage Project

    Energy Technology Data Exchange (ETDEWEB)

    JOSEPHSON, W S

    2003-09-04

    There are 1,936 cesium (Cs) and strontium (Sr) capsules stored in pools at the Waste Encapsulation and Storage Facility (WESF). These capsules will be moved to dry storage on the Hanford Site as an interim measure to reduce risk. The Cs/Sr Capsule Dry Storage Project is conducted under the assumption that the capsules will eventually be moved to the repository at Yucca Mountain, and the design criteria include requirements that will facilitate acceptance at the repository. The storage system must also permit retrieval of capsules in the event that vitrification of the capsule contents is pursued. The Capsule Advisory Panel (CAP) was created by the Project Manager for the Hanford Site Capsule Dry Storage Project (CDSP). The purpose of the CAP is to provide specific technical input to the CDSP; to identify design requirements; to ensure design requirements for the project are conservative and defensible; to identify and resolve emerging, critical technical issues, as requested; and to support technical reviews performed by regulatory organizations, as requested. The CAP will develop supporting and summary documents that can be used as part of the technical and safety bases for the CDSP. The purpose of capsule dry storage thermal analysis is to: (1) Summarize the pertinent thermal design requirements sent to vendors, (2) Summarize and address the assumptions that underlie those design requirements, (3) Demonstrate that an acceptable design exists that satisfies the requirements, (4) Identify key design features and phenomena that promote or impede design success, (5) Support other CAP analyses such as corrosion and integrity evaluations, and (6) Support the assessment of proposed designs. It is not the purpose of this report to optimize or fully analyze variations of postulated acceptable designs. The present evaluation will indicate the impact of various possible design features, but not systematically pursue design improvements obtainable through analysis

  3. Quality evaluation of the Finasteride polymorphic forms I and II in capsules.

    Science.gov (United States)

    da Silva, Lucélia Magalhães; Montanari, Cristina Martiniano; Santos, Olimpia Maria Martins; Cazedey, Edith Cristina Laignier; Ângelo, Marilene Lopes; de Araújo, Magali Benjamin

    2015-02-01

    Finasteride (FNS) is a specific competitive inhibitor of steroid type-II 5α-reductase and is widely used for the treatment of benign prostatic hyperplasia, prostate cancer, and androgenetic alopecia. FNS has two polymorphic forms identified as Form I and Form II. It is known that polymorphism can cause significant differences in the physicochemical properties of a compound such as melting point, density, morphology, solubility, and color. Thus, proper qualitative and quantitative monitoring of the solid-state forms is crucial to ensure high-quality products. There are no published papers studying the influence of the FNS polymorphs on the physicochemical quality of capsules. Furthermore, the available analytical methods are time-consuming, expensive, use buffer or do not demonstrate stability-indicating capacity. The aim of this work was to validate a rapid high-performance liquid chromatography (HPLC) method to evaluate FNS in capsules and to study the physicochemical properties of polymorphic forms, evaluating their possible influence in the dissolution profile and stability of FNS in capsules. Capsules containing Forms I and II of FNS were prepared and subjected to quality control studies, dissolution profiles and a stability study at 50°C. A significant effect of polymorphism on the FNS solubility and dissolution properties was observed. These results suggest that changes in the effects of FNS can occur if a suitable control study is not performed on the raw material used to produce the capsules.

  4. Preparation and characterization of novel fast disintegrating capsules (Fastcaps) for administration in the oral cavity.

    Science.gov (United States)

    Ciper, Mesut; Bodmeier, Roland

    2005-10-13

    The objective of this study was to prepare novel capsule-based fast disintegrating dosage forms for the oral cavity (Fastcaps). First, cast films were prepared from various additive-containing gelatin solutions and evaluated with respect to disintegration time and mechanical properties in order to identify suitable formulations for the capsule preparation. The disintegration time of films decreased with decreasing bloom strength and could be further decreased by the addition of sugars or PEGs. Fast disintegrating capsules were successfully prepared by a dipping process, whereby parameters such as the viscosity and temperature of the dipping solution and the dipping velocity of the steel pins were optimized. The required viscosity range of the dipping solution for Fastcap manufacturing was 500-600 cP. The addition of the hydrophilic additives (xylitol, sorbitol or PEG 1500) did not significantly affect the viscosity and gelation temperature of the dipping solution. The in vitro disintegration of Fastcaps (30-45 s) was twice as rapid as the one of regular hard gelatin capsules. In vivo, Fastcaps disintegrated rapidly (9-13 s) and their content was spread throughout the oral cavity within seconds. Lactose and/or microcrystalline cellulose were suitable fillers for Fastcaps. The mechanical properties of Fastcaps were similar to commercially available gelatin capsules, which assures good processability and handling.

  5. Adhesive capsulitis of the hip: a case report: an entity in question.

    Science.gov (United States)

    Lowe, Rebecca

    2013-12-01

    Very little has been discussed in the medical literature concerning adhesive capsulitis of the hip (ACH). There are no articles to date in the physical therapy literature regarding ACH and only a dozen or so in medical journals. Evidence suggests ACH may present in a similar progression through four stages as adhesive capsulitis of the shoulder (ACS) (from synovial inflammation to capsular fibrosis). Consensus does not exist for management of ACS or ACH. However, most clinicians agree that treatment should be guided by the stage of the disorder, whether medically, surgically, or through physical therapy. A large part of the confusion for management of adhesive capsulitis (ACS and ACH) is due to the many studies that have not reported their findings by stage. Arthroscopy and synovial/capsular biopsy can confirm the presence and stage of adhesive capsulitis. Primary (idiopathic) ACH is proposed to be caused by biomechanical dysfunction in the hip or other joints related to the mechanical function of the hip. The treatment for stages 1 and 2 consists of using techniques to reduce inflammation and correct biomechanical faults that affect the hip. In stages 3 and 4 treatment focuses on the biomechanical dysfunction of the spine, hip(s), pelvic ring, and lower limb, if needed. In this case, the 55-year-old female patient presenting with probable stage 3 adhesive capsulitis, responded well to manual therapy and has been able to return to functional activities and maintain them with a home program.

  6. Evaluation of released malathion and spinosad from chitosan/alginate/gelatin capsules against Culex pipiens larvae

    Directory of Open Access Journals (Sweden)

    Badawy MEI

    2016-09-01

    Full Text Available Mohamed EI Badawy,1 Nehad EM Taktak,2 Osama M Awad,2 Souraya A Elfiki,2 Nadia E Abou El-Ela2 1Department of Pesticide Chemistry and Technology, Faculty of Agriculture, 2Department of Tropical Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt Abstract: Efficacy of spinosad and malathion loaded in eco-friendly biodegradable formulations was evaluated for controlling Culex pipiens larvae. Malathion (organophosphorus larvicide and spinosad (naturally derived insecticide were loaded on chitosan/alginate/gelatin capsules. Capsules were characterized by size measurement, scanning electron microscopy, Fourier transform infrared spectroscopy, and water uptake. In vitro release kinetics of the larvicides was studied in the running and stagnant water. Biochemical studies on the larvae treated with technical and formulated insecticides were also demonstrated. The results indicated that the released spinosad was active for a long time up to 48 and 211 days in the running and stagnant water, respectively. However, the capsules loaded with malathion showed larvicidal activity for 20 and 27 days in the running and stagnant water, respectively. Technical and formulated malathion and spinosad had an inhibition effect on acetylcholinesterase, carboxylesterase, and glutathione S-transferase. The results proved that the prepared capsules consisting of biodegradable polymers containing larvicides could be effective as controlled-release formulation against C. pipiens larvae for a long period. Keywords: chitosan capsules, larvicide, controlled-release formulation, swelling, mosquitocidal activity, Culex pipiens, biochemical study

  7. Genomic analysis reveals the molecular basis for capsule loss in the group B Streptococcus population.

    Directory of Open Access Journals (Sweden)

    Roberto Rosini

    Full Text Available The human and bovine bacterial pathogen Streptococcus agalactiae (Group B Streptococcus, GBS expresses a thick polysaccharide capsule that constitutes a major virulence factor and vaccine target. GBS can be classified into ten distinct serotypes differing in the chemical composition of their capsular polysaccharide. However, non-typeable strains that do not react with anti-capsular sera are frequently isolated from colonized and infected humans and cattle. To gain a comprehensive insight into the molecular basis for the loss of capsule expression in GBS, a collection of well-characterized non-typeable strains was investigated by genome sequencing. Genome based phylogenetic analysis extended to a wide population of sequenced strains confirmed the recently observed high clonality among GBS lineages mainly containing human strains, and revealed a much higher degree of diversity in the bovine population. Remarkably, non-typeable strains were equally distributed in all lineages. A number of distinct mutations in the cps operon were identified that were apparently responsible for inactivation of capsule synthesis. The most frequent genetic alterations were point mutations leading to stop codons in the cps genes, and the main target was found to be cpsE encoding the portal glycosyl transferase of capsule biosynthesis. Complementation of strains carrying missense mutations in cpsE with a wild-type gene restored capsule expression allowing the identification of amino acid residues essential for enzyme activity.

  8. An implantable compound-releasing capsule triggered on demand by ultrasound.

    Science.gov (United States)

    Ordeig, Olga; Chin, Sau Yin; Kim, Sohyun; Chitnis, Parag V; Sia, Samuel K

    2016-03-11

    Implantable devices have a large potential to improve human health, but they are often made of biofouling materials that necessitate special coatings, rely on electrical connections for external communication, and require a continuous power source. This paper demonstrates an alternative platform, which we call iTAG (implantable thermally actuated gel), where an implanted capsule can be wirelessly controlled by ultrasound to trigger the release of compounds. We constructed a millimeter-sized capsule containing a co-polymer gel (NiPAAm-co-AAm) that contracts above body temperature (i.e. at 45 °C) to release compounds through an opening. This gel-containing capsule is biocompatible and free of toxic electronic or battery components. An ultrasound hardware, with a focused ultrasound (FUS) transducer and a co-axial A-mode imaging transducer, was used to image the capsule (to monitor in real time its position, temperature, and effectiveness of dose delivery), as well as to trigger a rapid local rise in temperature, contraction of gel, and release of compounds in vitro and in vivo. The combination of this gel-based capsule and compact ultrasound hardware can serve as a platform for triggering local release of compounds, including potentially in deep tissue, to achieve tailored personalized therapy.

  9. A Data Capsule Framework For Web Services: Providing Flexible Data Access Control To Users

    CERN Document Server

    Kannan, Jayanthkumar; Chun, Byung-Gon

    2010-01-01

    This paper introduces the notion of a secure data capsule, which refers to an encapsulation of sensitive user information (such as a credit card number) along with code that implements an interface suitable for the use of such information (such as charging for purchases) by a service (such as an online merchant). In our capsule framework, users provide their data in the form of such capsules to web services rather than raw data. Capsules can be deployed in a variety of ways, either on a trusted third party or the user's own computer or at the service itself, through the use of a variety of hardware or software modules, such as a virtual machine monitor or trusted platform module: the only requirement is that the deployment mechanism must ensure that the user's data is only accessed via the interface sanctioned by the user. The framework further allows an user to specify policies regarding which services or machines may host her capsule, what parties are allowed to access the interface, and with what parameter...

  10. Control of symmetry in Be implosions using a large Case to Capsule ratio

    Science.gov (United States)

    Kyrala, George; Kline, J.; Yi, A.; Loomis, E.; Simakov, A.; Wilson, D.; Ralph, J.; Rygg, R.; Strozzi, D.; Ak, G.

    2016-10-01

    (1) Tuning implosion symmetry in indirectly driven spherical capsules has been usually achieved by modifying the inner to outer beam powers inside a hohlraum. This has been done either by changing the wavelength difference between the beams in a gas filled hohlraum leading to cross beam energy transfer between the beams (CBET) , or by varying the inner to outer beam power ratio directly in low-density filled cylindrical hohlraums that permit much lower CBET. Symmetry had shown a large sensitivity to the power ratio of the inner to the outer beam power, partly due to the interaction of the inner beams with the ablated capsule material. To reduce the effect of the capsule ablation on the propagation of the inner laser beams, a larger ratio of the hohraum inner radius to the capsule outer radius has been investigated. This presentation will focus on the results of a series of experiments that monitored the symmetry of the imploding capsule shell as well as the later x-ray emission from the imploded core. We will compare to predictions and post shot calculations.

  11. Interaction model between capsule robot and intestine based on nonlinear viscoelasticity.

    Science.gov (United States)

    Zhang, Cheng; Liu, Hao; Tan, Renjia; Li, Hongyi

    2014-03-01

    Active capsule endoscope could also be called capsule robot, has been developed from laboratory research to clinical application. However, the system still has defects, such as poor controllability and failing to realize automatic checks. The imperfection of the interaction model between capsule robot and intestine is one of the dominating reasons causing the above problems. A model is hoped to be established for the control method of the capsule robot in this article. It is established based on nonlinear viscoelasticity. The interaction force of the model consists of environmental resistance, viscous resistance and Coulomb friction. The parameters of the model are identified by experimental investigation. Different methods are used in the experiment to obtain different values of the same parameter at different velocities. The model is proved to be valid by experimental verification. The achievement in this article is the attempted perfection of an interaction model. It is hoped that the model can optimize the control method of the capsule robot in the future.

  12. Research on the Capsule of Ganoderma lucidum and Zizhiphi spinozae Improving the Sleep in Mice

    Directory of Open Access Journals (Sweden)

    Ya-Li Dang

    2014-03-01

    Full Text Available Nowadays, more and more people are suffering from insomnia with difficulty in initiating or maintaining sleep. Ganoderma lucidum (G. lucidum and Ziziphi spinosae (Z. Spinosae are conventional herbal drugs in traditional Chinese medicine and they have been used lonely for the treatment of insomnia. In the present study, G. lucidum and Z. spinosae were combined and the active fractions were extracted to make the capsule. Furthermore, their effect on improving sleep in mice was investigated. The functional compositions of the capsule were polysaccharide, total flavone, spinosin and triterpenoid, with the content being 12.08, 1.35, 0.67 and 1.50 g/100 g, respectively. The effect of the capsule on improving sleep in mice was studied. Results showed no effects on the sleep induced directly in mice assessed with the loss-of-righting reflex even at the high dose of 450, 1350 mg/kg/day. However, the capsule significantly decreased sleep latency and increased sleeping time and prolonged sleeping time induced by pentobarbital sodium at high doses. In conclusion, the capsule of G. lucidum and Z. spinozae combined had the function of improving sleep

  13. An empirical study of the toxic capsule crisis in China: risk perceptions and behavioral responses.

    Science.gov (United States)

    Feng, Tianjun; Keller, L Robin; Wu, Ping; Xu, Yifan

    2014-04-01

    The outbreak of the toxic capsule crisis during April 2012 aroused widespread public concern about the risk of chromium-contaminated capsules and drug safety in China. In this article, we develop a conceptual model to investigate risk perceptions of the pharmaceutical drug capsules and behavioral responses to the toxic capsule crisis and the relationship between associated factors and these two variables. An online survey was conducted to test the model, including questions on the measures of perceived efficacy of the countermeasures, trust in the State FDA (Food and Drug Administration), trust in the pharmaceutical companies, trust in the pharmaceutical capsule producers, risk perception, concern, need for information, information seeking, and risk avoidance. In general, participants reported higher levels of risk perception, concern, and risk avoidance, and lower levels of trust in the three different stakeholders. The results from the structural equation modeling procedure suggest that perceived efficacy of the countermeasures is a predictor of each of the three trust variables; however, only trust in the State FDA has a dampening impact on risk perception. Both risk perception and information seeking are significant determinants of risk avoidance. Risk perception is also positively related to concern. Information seeking is positively related to both concern and need for information. The theoretical and policy implications are also discussed.

  14. A wireless capsule system with ASIC for monitoring the physiological signals of the human gastrointestinal tract.

    Science.gov (United States)

    Xu, Fei; Yan, Guozheng; Zhao, Kai; Lu, Li; Gao, Jinyang; Liu, Gang

    2014-12-01

    This paper presents the design of a wireless capsule system for monitoring the physiological signals of the human gastrointestinal (GI) tract. The primary components of the system include a wireless capsule, a portable data recorder, and a workstation. Temperature, pH, and pressure sensors; an RF transceiver; a controlling and processing application specific integrated circuit (ASIC); and batteries were applied in a wireless capsule. Decreasing capsule size, improving sensor precision, and reducing power needs were the primary challenges; these were resolved by employing micro sensors, optimized architecture, and an ASIC design that include power management, clock management, a programmable gain amplifier (PGA), an A/D converter (ADC), and a serial peripheral interface (SPI) communication unit. The ASIC has been fabricated in 0.18- μm CMOS technology with a die area of 5.0 mm × 5.0 mm. The wireless capsule integrating the ASIC controller measures Φ 11 mm × 26 mm. A data recorder and a workstation were developed, and 20 cases of human experiments were conducted in hospitals. Preprocessing in the workstation can significantly improve the quality of the data, and 76 original features were determined by mathematical statistics. Based on the 13 optimal features achieved in the evaluation of the features, the clustering algorithm can identify the patients who lack GI motility with a recognition rate reaching 83.3%.

  15. Wzi is an outer membrane lectin that underpins group 1 capsule assembly in Escherichia coli.

    Science.gov (United States)

    Bushell, Simon R; Mainprize, Iain L; Wear, Martin A; Lou, Hubing; Whitfield, Chris; Naismith, James H

    2013-05-07

    Many pathogenic bacteria encase themselves in a polysaccharide capsule that provides a barrier to the physical and immunological challenges of the host. The mechanism by which the capsule assembles around the bacterial cell is unknown. Wzi, an integral outer-membrane protein from Escherichia coli, has been implicated in the formation of group 1 capsules. The 2.6 Å resolution structure of Wzi reveals an 18-stranded β-barrel fold with a novel arrangement of long extracellular loops that blocks the extracellular entrance and a helical bundle that plugs the periplasmic end. Mutagenesis shows that specific extracellular loops are required for in vivo capsule assembly. The data show that Wzi binds the K30 carbohydrate polymer and, crucially, that mutants functionally deficient in vivo show no binding to K30 polymer in vitro. We conclude that Wzi is a novel outer-membrane lectin that assists in the formation of the bacterial capsule via direct interaction with capsular polysaccharides.

  16. Wzi Is an Outer Membrane Lectin that Underpins Group 1 Capsule Assembly in Escherichia coli

    Science.gov (United States)

    Bushell, Simon R.; Mainprize, Iain L.; Wear, Martin A.; Lou, Hubing; Whitfield, Chris; Naismith, James H.

    2013-01-01

    Summary Many pathogenic bacteria encase themselves in a polysaccharide capsule that provides a barrier to the physical and immunological challenges of the host. The mechanism by which the capsule assembles around the bacterial cell is unknown. Wzi, an integral outer-membrane protein from Escherichia coli, has been implicated in the formation of group 1 capsules. The 2.6 Å resolution structure of Wzi reveals an 18-stranded β-barrel fold with a novel arrangement of long extracellular loops that blocks the extracellular entrance and a helical bundle that plugs the periplasmic end. Mutagenesis shows that specific extracellular loops are required for in vivo capsule assembly. The data show that Wzi binds the K30 carbohydrate polymer and, crucially, that mutants functionally deficient in vivo show no binding to K30 polymer in vitro. We conclude that Wzi is a novel outer-membrane lectin that assists in the formation of the bacterial capsule via direct interaction with capsular polysaccharides. PMID:23623732

  17. An implantable compound-releasing capsule triggered on demand by ultrasound

    Science.gov (United States)

    Ordeig, Olga; Chin, Sau Yin; Kim, Sohyun; Chitnis, Parag V.; Sia, Samuel K.

    2016-03-01

    Implantable devices have a large potential to improve human health, but they are often made of biofouling materials that necessitate special coatings, rely on electrical connections for external communication, and require a continuous power source. This paper demonstrates an alternative platform, which we call iTAG (implantable thermally actuated gel), where an implanted capsule can be wirelessly controlled by ultrasound to trigger the release of compounds. We constructed a millimeter-sized capsule containing a co-polymer gel (NiPAAm-co-AAm) that contracts above body temperature (i.e. at 45 °C) to release compounds through an opening. This gel-containing capsule is biocompatible and free of toxic electronic or battery components. An ultrasound hardware, with a focused ultrasound (FUS) transducer and a co-axial A-mode imaging transducer, was used to image the capsule (to monitor in real time its position, temperature, and effectiveness of dose delivery), as well as to trigger a rapid local rise in temperature, contraction of gel, and release of compounds in vitro and in vivo. The combination of this gel-based capsule and compact ultrasound hardware can serve as a platform for triggering local release of compounds, including potentially in deep tissue, to achieve tailored personalized therapy.

  18. Genomic analysis reveals the molecular basis for capsule loss in the group B Streptococcus population.

    Science.gov (United States)

    Rosini, Roberto; Campisi, Edmondo; De Chiara, Matteo; Tettelin, Hervé; Rinaudo, Daniela; Toniolo, Chiara; Metruccio, Matteo; Guidotti, Silvia; Sørensen, Uffe B Skov; Kilian, Mogens; Ramirez, Mario; Janulczyk, Robert; Donati, Claudio; Grandi, Guido; Margarit, Immaculada

    2015-01-01

    The human and bovine bacterial pathogen Streptococcus agalactiae (Group B Streptococcus, GBS) expresses a thick polysaccharide capsule that constitutes a major virulence factor and vaccine target. GBS can be classified into ten distinct serotypes differing in the chemical composition of their capsular polysaccharide. However, non-typeable strains that do not react with anti-capsular sera are frequently isolated from colonized and infected humans and cattle. To gain a comprehensive insight into the molecular basis for the loss of capsule expression in GBS, a collection of well-characterized non-typeable strains was investigated by genome sequencing. Genome based phylogenetic analysis extended to a wide population of sequenced strains confirmed the recently observed high clonality among GBS lineages mainly containing human strains, and revealed a much higher degree of diversity in the bovine population. Remarkably, non-typeable strains were equally distributed in all lineages. A number of distinct mutations in the cps operon were identified that were apparently responsible for inactivation of capsule synthesis. The most frequent genetic alterations were point mutations leading to stop codons in the cps genes, and the main target was found to be cpsE encoding the portal glycosyl transferase of capsule biosynthesis. Complementation of strains carrying missense mutations in cpsE with a wild-type gene restored capsule expression allowing the identification of amino acid residues essential for enzyme activity.

  19. Influence of temperature and relative humidity conditions on the pan coating of hydroxypropyl cellulose molded capsules.

    Science.gov (United States)

    Macchi, Elena; Zema, Lucia; Pandey, Preetanshu; Gazzaniga, Andrea; Felton, Linda A

    2016-03-01

    In a previous study, hydroxypropyl cellulose (HPC)-based capsular shells prepared by injection molding and intended for pulsatile release were successfully coated with 10mg/cm(2) Eudragit® L film. The suitability of HPC capsules for the development of a colon delivery platform based on a time dependent approach was demonstrated. In the present work, data logging devices (PyroButton®) were used to monitor the microenvironmental conditions, i.e. temperature (T) and relative humidity (RH), during coating processes performed under different spray rates (1.2, 2.5 and 5.5g/min). As HPC-based capsules present special features, a preliminary study was conducted on commercially available gelatin capsules for comparison purposes. By means of PyroButton data-loggers it was possible to acquire information about the impact of the effective T and RH conditions experienced by HPC substrates during the process on the technological properties and release performance of the coated systems. The use of increasing spray rates seemed to promote a tendency of the HPC shells to slightly swell at the beginning of the spraying process; moreover, capsules coated under spray rates of 1.2 and 2.5g/min showed the desired release performance, i.e. ability to withstand the acidic media followed by the pulsatile release expected for uncoated capsules. Preliminary stability studies seemed to show that coating conditions might also influence the release performance of the system upon storage.

  20. Possible Radio Interference Between Video Capsule Endoscopy and Second-Generation OmniPod Patch Pump.

    Science.gov (United States)

    Pitocco, Dario; Rizzi, Alessandro; Tortora, Annalisa; Manto, Andrea; Zaccardi, Francesco; Ghirlanda, Giovanni; Costamagna, Guido; Riccioni, Maria Elena

    2016-07-01

    Video capsule endoscopy (VCE) is a noninvasive diagnostic tool used to observe the small intestinal mucosa. We report a case of a 57-year-old woman with T2DM, treated with continuous subcutaneous insulin infusion using second-generation OmniPod patch pump, undergoing VCE (Given M2A; VCE Ltd, Yoqneam, Israel) for melena and anemia. During VCE, an abnormal interruption of communication between video capsule and its receiver occurred. Two hours after capsule ingestion, the patient activated the insulin pump infusion through the Personal Diabetes Manager (PDM) because she drank a sugary beverage for the first time after ingestion. Due to this, we decided to repeat VCE after the removal of the insulin pump and PDM: at this time, the capsule recorded for more than 10 h without any interruption. The video capsule and second-generation OmniPod patch pump use the same radio frequency and this may cause interference between these two devices. In patients using second-generation OmniPod patch pump undergoing VCE, we suggest to switch to intravenous insulin infusion or multiple daily injection or to use a different model of VCE, as MiRoCam (Intromedic, Seoul, Korea).

  1. The dynamics of a capsule in a wall-bounded oscillating shear flow

    CERN Document Server

    Zhu, LaiLai; Brandt, Luca

    2015-01-01

    The motion of an initially spherical capsule in a wall-bounded oscillating shear flow is investigated via an accelerated boundary integral implementation. The neo-Hookean model is used as the constitutive law of the capsule membrane. The maximum wall-normal migration is observed when the oscillation period of the imposed shear is of the order of the relaxation time of the elastic membrane; hence, the optimal capillary number scales with the inverse of the oscillation frequency and the ratio agrees well with the theoretical prediction in the limit of high-frequency oscillation. The migration velocity decreases monotonically with the frequency of the applied shear and the capsule-wall distance. We report a significant correlation between the capsule lateral migration and the normal stress difference induced in the flow. The periodic variation of the capsule deformation is roughly in phase with that of the migration velocity and normal stress difference, with twice the frequency of the imposed shear. The maximum...

  2. Acute extensive ischemic enteritis in a young man diagnosed with wireless capsule endoscopy: a case report.

    Science.gov (United States)

    Jeong, Woo Seong; Song, Hyun Joo; Na, Soo Young; Boo, Sun Jin; Kim, Heung Up; Kim, Jinseok; Choi, Guk Myung

    2013-03-25

    Ischemic enteritis is caused by either the interruption or significant reduction of arterial inflow to the small intestine. Risk factors are old age, diabetes mellitus and cardiovascular disease. It is very rare in young patients. We experienced a 21-year-old man with recurrent acute ischemic enteritis who was diagnosed with capsule endoscopy. He had previously taken medications for pulmonary hypertension and obstruction of both carotid arteries, and about 20 months earlier, he had been admitted due to hematochezia. Two sessions of angiography did not reveal the cause of hematochezia. At that time, capsule endoscopy showed mucosal edema and erythema in the terminal ileum, suggesting healed ischemic enteritis. The patient was admitted again due to hematochezia. Abdominal computed tomography showed focal celiac trunk stenosis and diffuse wall thickening of the small intestine, suggesting ischemic enteritis. Capsule endoscopy showed multiple active ulcers and severe hemorrhage with exudate, extending from the proximal jejunum to the terminal ileum. Using capsule endoscopy, the patient was diagnosed with acute extensive ischemic enteritis. Because endoscopic images of ischemic enteritis have rarely been reported, we report a case of a 21-year-old man who was diagnosed acute extensive ischemic enteritis with capsule endoscopy.

  3. Cryptococcus neoformans capsule protects cell from oxygen reactive species generated by antimicrobial photodynamic inactivation

    Science.gov (United States)

    Prates, Renato Araujo; Hamblin, Michael R.; Kato, Ilka T.; Fuchs, Beth; Mylonakis, Eleytherios; Simões Ribeiro, Martha; Tegos, George

    2011-03-01

    Antimicrobial photodynamic inactivation (APDI) is based on the utilization of substances that can photosensitize biological tissues and are capable of being activated in the presence of light. Cryptococcus neoformans is an yeast surrounded by a capsule composed primarily of glucoronoxylomannan that plays an important role in its virulence. This yeast causes infection on skin, lungs and brain that can be associated with neurological sequelae and neurosurgical interventions, and its conventional treatment requires prolonged antifungal therapy, which presents important adverse effects. The aim of this study was to evaluate the protective effect of Cryptococcus neoformans capsule against reactive oxygen species generated by APDI. Cryptococcus neoformans KN99α, which is a strain able to produce capsule, and CAP59 that does not present capsule production were submitted to APDI using methylene blue (MB), rose bengal (RB), and pL-ce6 as photosensitizers (PS). Then microbial inactivation was evaluated by counting colony form units following APDI and confocal laser scanning microscopy (CLSM) illustrated localization as well as the preferential accumulation of PS into the fungal cells. C. neoformans KN99α was more resistant to APDI than CAP59 for all PSs tested. CLSM showed incorporation of MB and RB into the cytoplasm and a preferential uptake in mitochondria. A nuclear accumulation of MB was also observed. Contrarily, pL-ce6 appears accumulated in cell wall and cell membrane and minimal florescence was observed inside the fungal cells. In conclusion, the ability of C. neoformans to form capsule enhances survival following APDI.

  4. Evidence for a role of the polysaccharide capsule transport proteins in pertussis pathogenesis.

    Directory of Open Access Journals (Sweden)

    Regina Hoo

    Full Text Available Polysaccharide (PS capsules are important virulence determinants for many bacterial pathogens. Bordetella pertussis, the agent of whooping cough, produces a surface associated microcapsule but its role in pertussis pathogenesis remained unknown. Here we showed that the B. pertussis capsule locus is expressed in vivo in murine lungs and that absence of the membrane-associated protein KpsT, involved in the transport of the PS polymers across the envelope, but not the surface-exposed PS capsule itself, affects drastically B. pertussis colonization efficacy in mice. Microarray analysis revealed that absence of KpsT in B. pertussis resulted in global down-regulation of gene expression including key virulence genes regulated by BvgA/S, the master two-component system. Using a BvgS phase-locked mutant, we demonstrated a functional link between KpsT and BvgA/S-mediated signal transduction. Whereas pull-down assays do not support physical interaction between BvgS sensor and any of the capsule locus encoded proteins, absence of KpsT impaired BvgS oligomerization, necessary for BvgS function. Furthermore, complementation studies indicated that instead of KpsT alone, the entire PS capsule transport machinery spanning the cell envelope likely plays a role in BvgS-mediated signal transduction. Our work thus provides the first experimental evidence of a role for a virulence-repressed gene in pertussis pathogenesis.

  5. Exocrine contamination impairs implantation of pancreatic islets transplanted beneath the kidney capsule.

    Science.gov (United States)

    Gray, D W; Sutton, R; McShane, P; Peters, M; Morris, P J

    1988-11-01

    The effect of exocrine contamination on islets implanted under the kidney capsule has been studied by histological examination of pure or exocrine-contamination human, monkey, or rat islets transplanted to the kidney capsule of the nude rat, monkey, or rat, respectively. Exocrine contamination resulted in an appearance suggestive of impaired islet implantation, due to tissue necrosis and subsequent fibrosis. The effect of exocrine contamination was examined quantitatively in a rat islet isograft model in which handpicked DA rat islets were transplanted under the kidney capsule of normal DA rats. The islets were either pure or deliberately recontaminated with exocrine tissue (50 or 90% contamination). Four hundred pure islets were placed under one kidney capsule and 400 islets (of similar size and from the same islet preparation) were contaminated and then placed under the contralateral kidney capsule. After 2 weeks the kidneys were removed and extracted for insulin content. The insulin content of kidneys bearing islets contaminated by either 50 or 90% exocrine tissue was significantly reduced when compared to the contralateral kidney bearing pure islets. These findings support the view that exocrine contamination of islets resulted in impaired islet implantation when transplanted to a confined site such as the kidney subcapsule.

  6. Status of the Development of Beryllium-Copper Alloy Ignition Capsules by Precision Machining

    Science.gov (United States)

    Nobile, Arthur

    2005-10-01

    Cu-doped Be capsules are being developed for ignition on the National Ignition Facility (NIF). The fabrication approach being pursued at Los Alamos is based on bonding of cylindrical parts containing precision machined hemispherical cavities, followed by machining the external contour to produce a spherical capsule. While we have demonstrated this approach, there are several key issues that need to be resolved before a capsule meeting NIF specifications can be produced. These issues are synthesis of high purity small grain size Be-Cu alloy, formation of a hemishell bond strong enough to allow the capsule to be machined after the hemishells are bonded, precision machining and polishing of the capsule to meet stringent specifications for surface finish and spherical quality, and filling with DT. In this paper we report on the progress that has been made on these issues. This work is performed at Los Alamos National Laboratory and supported by U.S. Department of Energy under contract number W7405-ENG36

  7. Angular radiation temperature simulation for time-dependent capsule drive prediction in inertial confinement fusion

    Energy Technology Data Exchange (ETDEWEB)

    Jing, Longfei; Yang, Dong; Li, Hang; Zhang, Lu; Lin, Zhiwei; Li, Liling; Kuang, Longyu [Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 (China); Jiang, Shaoen, E-mail: jiangshn@vip.sina.com; Ding, Yongkun [Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 (China); Center for Applied Physics and Technology, Peking University, Beijing 100871 (China); Huang, Yunbao, E-mail: huangyblhy@gmail.com [Mechatronics School of Guangdong University of Technology, Guangzhou 510080 (China)

    2015-02-15

    The x-ray drive on a capsule in an inertial confinement fusion setup is crucial for ignition. Unfortunately, a direct measurement has not been possible so far. We propose an angular radiation temperature simulation to predict the time-dependent drive on the capsule. A simple model, based on the view-factor method for the simulation of the radiation temperature, is presented and compared with the experimental data obtained using the OMEGA laser facility and the simulation results acquired with VISRAD code. We found a good agreement between the time-dependent measurements and the simulation results obtained using this model. The validated model was then used to analyze the experimental results from the Shenguang-III prototype laser facility. More specifically, the variations of the peak radiation temperatures at different view angles with the albedo of the hohlraum, the motion of the laser spots, the closure of the laser entrance holes, and the deviation of the laser power were investigated. Furthermore, the time-dependent radiation temperature at different orientations and the drive history on the capsule were calculated. The results indicate that the radiation temperature from “U20W112” (named according to the diagnostic hole ID on the target chamber) can be used to approximately predict the drive temperature on the capsule. In addition, the influence of the capsule on the peak radiation temperature is also presented.

  8. The Type a and Type b Polysaccharide Capsules Predominate in an International Collection of Invasive Kingella kingae Isolates.

    Science.gov (United States)

    Porsch, Eric A; Starr, Kimberly F; Yagupsky, Pablo; St Geme, Joseph W

    2017-01-01

    Kingella kingae is an encapsulated Gram-negative bacterium and an important etiology of osteoarticular infections in young children. A recent study examining a diverse collection of carrier and invasive K. kingae isolates from Israel revealed four distinct polysaccharide capsule types. In this study, to obtain a global view of K. kingae capsule type diversity, we examined an international collection of isolates using a multiplex PCR approach. The collection contained all four previously identified capsule types and no new capsule types. Over 95% of invasive isolates in the collection were type a or type b, similar to the findings in Israel. These results suggest that the type a and type b polysaccharide capsules may have enhanced pathogenic properties or may mark clonal groups of strains with specific virulence genes. In addition, they raise the possibility that a vaccine containing the type a and type b capsules might be an effective approach to preventing K. kingae disease. IMPORTANCEKingella kingae has emerged as a significant cause of septic arthritis, osteomyelitis, and bacteremia in young children. A recent study examining a diverse collection of K. kingae isolates from Israel revealed four different polysaccharide capsule types in this species, designated types a to d. To determine the global distribution of K. kingae capsule types, we assembled and capsule typed an international collection of K. kingae isolates. The findings reported here show that the type a and type b capsules represent >95% of the invasive isolates, similar to the Israeli isolate collection, suggesting that a polysaccharide-based vaccine targeting these two capsules could be an attractive approach to prevent K. kingae disease.

  9. Self-assembly of amphiphilic janus particles into monolayer capsules for enhanced enzyme catalysis in organic media.

    Science.gov (United States)

    Cao, Wei; Huang, Renliang; Qi, Wei; Su, Rongxin; He, Zhimin

    2015-01-14

    Encapsulation of enzymes during the creation of an emulsion is a simple and efficient route for enhancing enzyme catalysis in organic media. Herein, we report a capsule with a shell comprising a monolayer of silica Janus particles (JPs) (referred to as a monolayer capsule) and a Pickering emulsion for the encapsulation of enzyme molecules for catalysis purposes in organic media using amphiphilic silica JPs as building blocks. We demonstrate that the JP capsules had a monolayer shell consisting of closely packed silica JPs (270 nm). The capsules were on average 5-50 μm in diameter. The stability of the JP capsules (Pickering emulsion) was investigated with the use of homogeneous silica nanoparticles as a control. The results show that the emulsion stabilized via amphiphilic silica JPs presented no obvious changes in physical appearance after 15 days, indicating the high stability of the emulsions and JP capsules. Furthermore, the lipase from Candida sp. was chosen as a model enzyme for encapsulation within the JP capsules during their formation. The catalytic performance of lipase was evaluated according to the esterification of 1-hexanol with hexanoic acid. It was found that the specific activity of the encapsulated enzymes (28.7 U mL(-1)) was more than 5.6 times higher than that of free enzymes in a biphasic system (5.1 U mL(-1)). The enzyme activity was further increased by varying the volume ratio of water to oil and the JPs loadings. The enzyme-loaded capsule also exhibited high stability during the reaction process and good recyclability. In particular, the jellification of agarose in the JP capsules further enhanced their operating stability. We believe that the monolayer structure of the JP capsules, together with their high stability, rendered the capsules to be ideal enzyme carriers and microreactors for enzyme catalysis in organic media because they created a large interfacial area and had low mass transfer resistance through the monolayer shell.

  10. Morpho-functional evaluation of small bowel using wireless motility capsule and video capsule endoscopy in patients with known or suspected Crohn’s disease: pilot study

    Science.gov (United States)

    Yung, Diana; Douglas, Sarah; Hobson, Anthony R.; Giannakou, Andry; Plevris, John N.; Koulaouzidis, Anastasios

    2016-01-01

    Background and study aims: SmartPill® (Given Imaging Corp.,Yoqneam,Israel) is an ingestible, non-imaging capsule that records physiological data including contractions and pH throughout the gastrointestinal tract. There are scarce data looking at SmartPill® assessment of patients with known/suspected small-bowel Crohn’s Disease (CD). This pilot study aims to investigate feasibility and safety of SmartPill® to assess gut motility in this group.  Patients and methods: Over 1 year, patients with known/suspected CD, referred for small-bowel capsule endoscopy (SBCE), were invited to participate and 12 were recruited (7 female, 5 male, mean age 44.2 ± 16.6 years). They underwent hydrogen breath test to exclude small-bowel bacterial overgrowth, patency capsule (Agile®), and provided stool samples for fecal calprotectin (FC). Patients ingested PillCam®SB2 and SmartPill® 4 hours apart. Using unpublished data, 33 healthy controls also were identified for the study. P < 0.05 was considered statistically significant. Results: Of the 12 patients enrolled, 10 underwent complete Smartpill® examination (1 stomach retention, 1 dropout). Pillcam® was complete in 10 (1 dropout, 1 stomach retention). Mean fecal calprotectin was 340 ± 307.71 mcg/g. The study group had longer transit times and lower gut motility index than did the controls. The difference in motility appears to be statistically significant (P < 0.05). Longer transit times for SmartPill® (not statistically significant) may have been due to different specifications between the capsules. Limitations included transient Smartpill® signal loss (5/10 studies). Conclusions: This is the first pilot to attempt combining SBCE and SmartPill® to assess small-bowel CD. Data on motility in CD are scarce. Multimodal information can provide a clearer clinical picture. Despite concerns about capsule retention in CD patients, SmartPill® seems safe for use if a patency capsule is employed beforehand. PMID

  11. Study on the Pharmacokinetics and Relative Bioavailability of Irbesartan Capsul es in Heal thy Volunteers

    Institute of Scientific and Technical Information of China (English)

    顾世芬; 陈汇; 邱应海; 师少军; 曾繁典

    2002-01-01

    The pharmacokinetics and relative bioavailability were studied in 18 healthy volunteers. A single oral dose of 150 mg irbesartan capsule (test) or tablet (reference) was given to each volunteer according to a randomized 2-way crossover study. The concentrations in plasma were determined by HPLC-UV method. The main parameters of irbesartan capsules were: Cmax: 1. 502± 0. 295 μg/ml,tmax: 1. 44±0. 34 h, t1/2: 20. 21±14. 71 h, AUC0-t: 11. 087t3.443 μg/ml-1·h. The relative bioavailability of capsule to tablet was (101.4±28.9) %. The results of statistical analysis showed that two formulations were hioequivalent.

  12. [Application of molecularly imprinted technology for separation of PGG from Guizhi Fuling capsule].

    Science.gov (United States)

    Song, Ya-ling; Wang, Xue-jing; Ni, Fu-yong; Gu, Rui; Zhao, Yi-wu; Huang, Wen-zhe; Wang, Zhen-zhong; Xu, Xiao-jie; Xiao, Wei

    2015-03-01

    1,2,3,4,6-penta-O-galloyl-D-glucose (PGG) is one of the main active compounds of Guizhi Fuling capsule. Molecularly imprinted polymers (MIP) have high affinity toward template molecules synthesized by molecularly imprinted technology for its specific combined sites, which can overcome the shortcoming of traditional separation methods, such as complex operation, low efficiency, using large quantity of solvent and environmental pollution. In this paper, surface molecularly imprinted polymer (SMIP) was prepared by surface imprinting with PGG as the template molecule. Its adsorption capacity was measured by the scatchard equation. The separation of PGG from Guizhi Fuling capsule at preparatived scale was achieved with molecularly imprinted polymer as stationary phase and the purity was 90.2% by HPLC. This method can be used to prepare PGG from Guizhi Fuling capsule with large capacity and is easy to operate. It provides a new method for efficient separation and purification for other natural products.

  13. Inhibitory Mechanism of Inteferon-gamma on Human Fibroblasts from Tenon's Capsule

    Institute of Scientific and Technical Information of China (English)

    韩波; 胡义珍; 熊新春

    2004-01-01

    Summary: The inhibitory mechanism of interferon-gamma (IFN-γ) on the fibroblasts from Tenon's capsule was studied. By using immunohistochemical SP method and pathological image system, the inhibitory effects of IFN-γ on the expression of transforming growth factor beta receptor I in the in vitro cultured fibroblasts from Tenon's capsule were quantitatively analyzed. The results showed that IFN-γ could reduce the expression of transforming growth factor beta receptor I in the fibroblasts with the following dose-effect relationship: Y= 1937.5-134.2 Igx (r= -0. 971, P<0.01).It was concluded that IFN-γ could inhibit the expression of transforming growth factor beta receptor I in the fibroblasts from Tenon's capsule. The modulation of the transforming growth factor beta receptor I expression by IFN-γ may be beneficial to the alleviation of the hyperplasia of scar after trabeculectomy.

  14. Prompt Beta Spectroscopy as a Diagnostic for Mix in Ignited NIF Capsules

    CERN Document Server

    Hayes, A C; Solem, J C; Bradley, P A; Rundberg, R S

    2004-01-01

    The National Ignition Facility (NIF) technology is designed to drive deuterium-tritium (DT) internal confinement fusion (ICF) targets to ignition using indirect radiation from laser beam energy captured in a hohlraum. Hydrodynamical instabilities at interfaces in the ICF capsule leading to mix between the DT fue l and the ablator shell material are of fundamental physical interest and can affect the performance characteristics of the capsule. In this Letter we describe new radiochemical diagnostics for mix processes in ICF capsules with plastic or Be (0.9%Cu) ablator shells. Reactions of high-energy tritons with shell material produce high-energy $\\beta$-emitters. We show that mix between the DT fuel and the shell material enhances high-energy prompt beta emission from these reactions by more than an order of magnitude over that expected in the absence of mix.

  15. Vacuum encapsulated hermetically sealed diamond amplified cathode capsule and method for making same

    Science.gov (United States)

    Rao, Triveni; Walsh, John; Gangone, Elizabeth

    2014-12-30

    A vacuum encapsulated, hermetically sealed cathode capsule for generating an electron beam of secondary electrons, which generally includes a cathode element having a primary emission surface adapted to emit primary electrons, an annular insulating spacer, a diamond window element comprising a diamond material and having a secondary emission surface adapted to emit secondary electrons in response to primary electrons impinging on the diamond window element, a first cold-weld ring disposed between the cathode element and the annular insulating spacer and a second cold-weld ring disposed between the annular insulating spacer and the diamond window element. The cathode capsule is formed by a vacuum cold-weld process such that the first cold-weld ring forms a hermetical seal between the cathode element and the annular insulating spacer and the second cold-weld ring forms a hermetical seal between the annular spacer and the diamond window element whereby a vacuum encapsulated chamber is formed within the capsule.

  16. Vacuum encapsulated, high temperature diamond amplified cathode capsule and method for making same

    Science.gov (United States)

    Rao, Triveni; Walsh, Josh; Gangone, Elizabeth

    2015-12-29

    A vacuum encapsulated, hermetically sealed cathode capsule for generating an electron beam of secondary electrons, which generally includes a cathode element having a primary emission surface adapted to emit primary electrons, an annular insulating spacer, a diamond window element comprising a diamond material and having a secondary emission surface adapted to emit secondary electrons in response to primary electrons impinging on the diamond window element, a first high-temperature solder weld disposed between the diamond window element and the annular insulating spacer and a second high-temperature solder weld disposed between the annular insulating spacer and the cathode element. The cathode capsule is formed by a high temperature weld process under vacuum such that the first solder weld forms a hermetical seal between the diamond window element and the annular insulating spacer and the second solder weld forms a hermetical seal between the annular spacer and the cathode element whereby a vacuum encapsulated chamber is formed within the capsule.

  17. Effect of a controlled-release albendazole capsule on parasitism and productivity of sheep.

    Science.gov (United States)

    Corba, J; Krupicer, I; Legény, J; Juris, P; Veselý, L

    1991-11-01

    The efficacy of intraruminal albendazole (ABZ) capsules (Profitril-Captec) and the effect of treatment on productivity were studied in 300 ewes infected with gastrointestinal nematodes and the trematode Dicrocoelium dendriticum. Coprological tests revealed that treated animals remained negative for 10 weeks after the administration of capsules. Contamination of pasture with nematode larvae was significantly reduced during the whole experiment. Necropsy of 14 animals (seven treated and seven untreated) showed 96.9-99.2% efficacy against the nematodes Nematodirus spp., Oesophagostomum spp., Cooperia spp., Trichostrongylus spp. and Trichuris ovis, while efficacy was 88.5% against D. dendriticum. During the 6 month pasture season (May-October 1989), treated ewes produced on average 2.56 kg cheese and 0.6 kg wool per ewe more than untreated controls. Our study confirms the reliability of the ABZ slow-release capsules over 90 days and the positive effect of treatment on nematode contamination of pasture and ewe productivity.

  18. Development of nanostructured magnetic capsules by means of the layer by layer technique.

    Science.gov (United States)

    Herrera, Oscar L; Parigi, Enrico; Habibi, Neda; Pastorino, Laura; Caneva Soumetz, Federico; Ruggiero, Carmelina

    2010-01-01

    Nanomagnetic particles have been already taken into account as drug carriers thank to the possibility to control their movement to a specific location where the treatment is required by means of high gradient magnetic fields (HGMF). In this work the layer-by-layer technique (LbL) and nanomagnetic particles were used to developed innovative nanostructured magnetic capsules (NSMC). Their potential application as magnetic drug carriers was investigated under the influence of both static and oscillating magnetic fields used respectively to control capsule displacement and shell permeability. The assembly process of the nanostructured magnetic capsules, its characterization by Quartz Crystal Microbalance (QCM), and the results obtained under the influence of the magnetic fields are presented.

  19. A study on the synthesis of multiple emulsion and multiple capsule using chitosan-PVP system

    Energy Technology Data Exchange (ETDEWEB)

    Jung, K.T.; Shul, Y.G. [Yonsei University, Seoul (Korea, Republic of); Lee, H.; Lee, M.S.; Nam, S.I. [Cheiljaedang Co. (Korea, Republic of)

    1998-04-01

    Multiple capsule was prepared by using chitosan-PVP multiple emulsion system(W/O/W) in which oil and water phase can co-exist simultaneously. In multiple emulsion, chitosan and PVP solution were used for external and internal aqueous phase materials, respectively. And squalane was used for oil phase material. To increase the stability of multiple emulsion, multiple emulsion was ejected into the NaOH solution through the nozzle to form multiple capsule of 2-3 mm in diameter, where the chitosan-PVP composite was used as a wall materials. The hardness of this multiple capsule was found to increase as the amount of PVP increased. Antibacterial property of this multicapsule was tested by E. coli. After 1 h, there was drastic decrease of E. coli population and all the E. coli was diminished after 24 h.

  20. Capsule endoscopy in clinical practice: concise up-to-date overview

    Directory of Open Access Journals (Sweden)

    Anastasios Koulaouzidis

    2009-11-01

    Full Text Available Anastasios Koulaouzidis, Sarah DouglasCentre for Liver and Digestive Disorders, Royal Infirmary of Edinburgh, Edinburgh, UKAbstract: Until recently, the small bowel was considered a ‘no man’s land’ as the imaging modalities available for its investigation were laborious, invasive, costly, or involve significant radiation exposure. Wireless capsule endoscopy (WCE has changed the field dramatically, over the last eight years. The established indications for small bowel WCE are obscure gastrointestinal bleed/anemia, Crohn’s disease, hereditary polyposis syndromes, and to a lesser extent, evaluation of side effects of nonsteroidal anti-inflammatory medications and coeliac disease. We herein present an overview of the capsule examination, which seems to be a quickly improving area.Keywords: capsule, imaging, small bowel, Crohn’s, celiac, GI bleed

  1. Measurement of inflight shell areal density perturbations in NIF capsule implosions near peak velocity

    Science.gov (United States)

    Hammel, B. A.; Pickworth, L.; Smalyuk, V.; Macphee, A.; Scott, H. A.; Robey, H.; Barrios, M.; Regan, S. P.

    2015-11-01

    Quantitative measurements of shell-RhoR perturbations in capsules near peak implosion velocity (PV) are challenging. An external backlighter samples both sides of the shell, unless a re-entrant cone is used (potentially perturbing implosion). Emission from the hot core, after shock-stagnation and prior to PV, has been used as a self-backlighter, providing a means to sample one side of the capsule. Adding high-Z gas (~ 1% Ar) to the capsule fill in Symcaps (4He), has produced a continuum backlighter with significant increase in emission at photon energies ~ 8 keV over nominal fills. From images of the transmitted self-emission, above and below the K-edge of an internally doped Cu layer, we infer the growth at PV of imposed perturbations (100 nm amplitude, mode 40). Prepared by LLNL under Contract DE-AC52-07NA27344.

  2. Contribution of fucose-containing capsules in Klebsiella pneumoniae to bacterial virulence in mice.

    Science.gov (United States)

    Wu, June Hsieh; Wu, Albert M; Tsai, Cheng Gie; Chang, Xin-Yu; Tsai, Shih-Feng; Wu, Ting-Shu

    2008-01-01

    Bacterium Klebsiella pneumoniae (KP) contains a prominent capsule. Clinical infections usually are associated with pneumonia or urinary tract infection (UTI). Emerging evidence implicates KP in severe liver abscess especially in diabetic patients. The goal of this study was to investigate the capsular polysaccharides from KP of liver abscess (hepatic-KP) and of UTI-KP. The composition of capsular polysaccharides was analyzed by capillary high-performance liquid chromatography (HPLC, Dionex system). The terminal sugars were assayed by binding ability to lectins. The results showed that the capsule of a hepatic KP (KpL1) from a diabetic patient contained fucose, while the capsule from UTI-KP (KpU1) did not. The absence of fucose was verified by the absence of detectable polymerase chain reaction (PCR) fragment for fucose synthesis genes, gmd and wcaG in KpU1. Mice infected with the KpL1 showed high fatality, whereas those infected with the KpU1 showed high survival rate. The KpL1 capsule was reactive to lectins AAA and AAL, which detect fucose, while the KpU1 capsule was reactive to lectin GNA, which detects mannose. Phagocytosis experiment in mouse peritoneal cavity indicated that the peritoneal macrophages could interact with KpU1, while rare association of KpL1 with macrophages was observed. This study revealed that different polysaccharides were displayed on the bacterial capsules of virulent KpL1 as compared with the less virulent KpU1. Interaction of KpU1 with mice peritoneal macrophages was more prominent than that of KpL1. The possession of fucose might contribute to KpL1 virulence by avoiding phagocytosis since fucose on bacteria had been implicated in immune evasion.

  3. On-the-fly detection of images with gastritis aspects in magnetically guided capsule endoscopy

    Science.gov (United States)

    Mewes, P. W.; Neumann, D.; Juloski, A. L.; Angelopoulou, E.; Hornegger, J.

    2011-03-01

    Capsule Endoscopy (CE) was introduced in 2000 and has since become an established diagnostic procedure for the small bowel, colon and esophagus. For the CE examination the patient swallows the capsule, which then travels through the gastrointestinal tract under the influence of the peristaltic movements. CE is not indicated for stomach examination, as the capsule movements can not be controlled from the outside and the entire surface of the stomach can not be reliably covered. Magnetically-guided capsule endoscopy (MGCE) was introduced in 2010. For the MGCE procedure the stomach is filled with water and the capsule is navigated from the outside using an external magnetic field. During the examination the operator can control the motion of the capsule in order to obtain a sufficient number of stomach-surface images with diagnostic value. The quality of the examination depends on the skill of the operator and his ability to detect aspects of interest in real time. We present a novel computer-assisted diagnostic-procedure (CADP) algorithm for indicating gastritis pathologies in the stomach during the examination. Our algorithm is based on pre-processing methods and feature vectors that are suitably chosen for the challenges of the MGCE imaging (suspended particles, bubbles, lighting). An image is classified using an ada-boost trained classifier. For the classifier training, a number of possible features were investigated. Statistical evaluation was conducted to identify relevant features with discriminative potential. The proposed algorithm was tested on 12 video sequences stemming from 6 volunteers. A mean detection rate of 91.17% was achieved during leave-one out cross-validation.

  4. Plasma pharmacological study on Da Huang Zhe Chong capsule on platelet aggregation of normal person

    Institute of Scientific and Technical Information of China (English)

    WANG Dong-sheng; CHEN Fang-ping; XIAO Chang-jiang; HE Shi-lin; FU Bin; LI Xin; CAO Xing-yu; CHEN Yan; XIE Qin-zhi

    2005-01-01

    Objective To develop a plasma pharmacological method evaluates the effect of Da Huang Zhe Chong capsule on platelet aggregation and its mechanism, which is a representative Traditional Chinese Medicine Patent Prescription Promoting blood circulation by removing blood stasis. Methods Platelets specimens from healthy volunteers made serum and plasma with medicine, while platelet PRP were separated, which were divided into 8groups,i.e. auto-serum, allo-serum, serum with Da Huang Zhe Chong capsule , serum with aspirin, auto-plasma, plasma with Da Huang Zhe Chong capsule, plasma with aspirin, every group added to serum and plasma to hatch. After ADP and adrenalin were added into the specimens and hatched, the effects of specimens on platelet aggregation were observed. Results After ADP adrenalin were added, all the serum groups did not present platelet aggregation,while all the plasma group presented platelet aggregation. P1, P5, Pmax, t and TM have no significant difference (P>0. 05) between auto-plasma group and allo-plasma group induced by ADP and adrenalin. P1, P5, t and Pmax have significant differences (P<0. 01) and TM decreased significantly (P<0. 05) comparing plasma group with Da Huang Zhe Chong capsule and plasma group of aspirin to allo-plasma group. P1, t and Pmax have significant difference (P<0.05), and P5 and TM are simulate comparing plasma group with Da Huang Zhe Chong capsule to plasma group of aspirin. P1, P5, t and Pmax have significant differences (P<0. 01), P1, TM have also significant(P<0. 05), comparing plasma group of Da Huang Zhe Chong capsule with plasma of aspirin to allo-plasma group induced by adrenalin. P1 ,P5 and Pmax have significant differences (P<0.05), and t and Pmax are simulate comparing plasma group with Da Huang Zhe Chong capsule with plasma group of aspirin. Conclusion The serum pharmacological study is inappropriate to study platelet aggregation in vitro. The plasma pharmacological study is inappropriate to study

  5. AN ELECTROMAGNETIC PNEUMO CAPSULE SYSTEM FOR CONVEYING MINERALS AND MINE WASTES

    Energy Technology Data Exchange (ETDEWEB)

    Henry Liu; Charles W. Lenau

    2005-03-01

    The purpose of this project is to investigate the technical and economic feasibility of using a new and advanced pneumatic capsule pipeline (PCP) system for transporting minerals and mine wastes. The new system is different from conventional PCPs in two main respects: (1) it uses linear induction motors (LIMs) instead of blowers (fans) at the inlet of the pipeline to drive (pump) the capsules and the air through the pipeline; and (2) the capsules in the PCP have steel wheels running on steel rails as opposed to capsules in conventional systems, which use wheels with rubber tires running inside a pipe without rail. The advantage of using LIM pump instead of blower is that the former is non-intrusive and hence does not block the passage of capsules, enabling the system to run continuously without having to make the capsules bypass the pump. This not only simplifies the system but also enables the system to achieve much larger cargo throughput than that of PCPs using blowers, and use of LIMs as booster pumps which enables the system to have any length or to be used for transporting cargoes over practically any distance, say even one thousand kilometers or miles. An advantage of using steel wheels rolling on steel rails instead of using rubber tires rolling inside a pipeline is that the rolling friction coefficient and hence the use of energy is greatly reduced from that of conventional PCP systems. Moreover, rails enable easy control of capsule motion, such as switching capsules to a branch line by using railroad switching equipment. The advanced PCP system studied under this project uses rectangular conduits instead of circular pipe, having cross-sectional areas of 1 m by 1 m approximately. The system can be used for various transportation distances, and it can transport up to 50 million tonnes (metric tons) of cargo annually--the throughput of the largest mines in the world. Both an aboveground and an underground system were investigated and compared. The technical

  6. Altered multiaxial mechanical properties of the porcine anterior lens capsule cultured in high glucose.

    Science.gov (United States)

    Pedrigi, R M; Staff, E; David, G; Glenn, S; Humphrey, J D

    2007-02-01

    Hyperglycemia can alter the mechanical properties of tissues through the formation of advanced glycation endproducts in matrix proteins that have long half-lives. We used a custom experimental system and subdomain finite element method to quantify alterations in the regional multiaxial mechanical properties of porcine lens capsules that were cultured for 8 or 14 weeks in high glucose versus control media. Findings revealed that high glucose significantly stiffened the capsules in both the circumferential and the meridional directions, but it did not affect the known regional variations in anisotropy. Such information could be important in the design of both improved clinical procedures and intraocular implants for diabetic patients.

  7. Development and validation of a dissolution test for diltiazem hydrochloride in immediate release capsules

    Directory of Open Access Journals (Sweden)

    Taciane Ferreira Mendonça

    2011-01-01

    Full Text Available This work describes the development and validation of a dissolution test for 60 mg of diltiazem hydrochloride in immediate release capsules. The best dissolution in vitro profile was achieved using potassium phosphate buffer at pH 6.8 as the dissolution medium and paddle as the apparatus at 50 rpm. The drug concentrations in the dissolution media were determined by UV spectrophotometry and HPLC and a statistical analysis revealed that there were significant differences between HPLC and spectrophotometry. This study illustrates the importance of an official method for the dissolution test, since there is no official monograph for diltiazem hydrochloride in capsules.

  8. Isolation and Characterization of Antitumor Alkaloid from Poppy Capsules (Papaver somniferum

    Directory of Open Access Journals (Sweden)

    Ibrahim Bulduk

    2013-01-01

    Full Text Available Noscapine, a phthalideisoquinoline alkaloid derived from opium, has been used in the treatment of various cancer types. Its low-toxicity profile has increased attention to this alkaloid. With regard to increasing demand for this compound, we developed a new method for isolation of noscapine from dried capsules of Papaver somniferum. Noscapine was successfully isolated from poppy capsules for the first time and the purity of the isolated compound was determined to be over 99.59% by HPLC analysis. The structure of noscapine was confirmed by 1H NMR, 13C NMR, FT-IR, elemental analysis, and HR-ESI-MS methods.

  9. [The lateral splitting of the knee joint capsule for treatment of chondropathia patellae (author's transl)].

    Science.gov (United States)

    Dobler, R

    1977-06-26

    This is a report on the results of the lateral splitting of the knee-joint capsule for treatment of chondropathia patellae. The operative procedure is described. Pains relative to the patella syndrome, chondropathia patellae, forms of dysplasia of the patella and lateral dislocation of the patella are regarded as indications. 50 knee-joints were post-examined. 26% were without complaints, 54% showed improvement, 10% no change, 10% deteriorated. These results are comparable to those of other, more intensive surgery. Representing a comparatively minor operation, the lateral splitting of the capsule is therefore particularly recommended for young patients.

  10. CULTURAL CAPSULES AND READING TEXTS: TRIGGERS TO CROSS-CULTURAL LANGUAGE AWARENESS

    Directory of Open Access Journals (Sweden)

    Maya Khemlani David

    2005-01-01

    Full Text Available The use of English in the international setting is based on cultural presuppositions about the kinds of language performance that are appropriate for specific situations. Culture capsules are useful teaching techniques to teach English, as learners would be able to bring in their own cultural insights into learning the pragmatics of English through the various combinations of word choice, prosodic and paralinguistic features. This paper will provide examples of capsules which focus on a range of speech acts (greetings, directives, requests, etc and demonstrate how they can be used as a stimulus to cross-cultural language awareness.

  11. Bioavailability study of dronabinol oral solution versus dronabinol capsules in healthy volunteers

    Directory of Open Access Journals (Sweden)

    Parikh N

    2016-10-01

    Full Text Available Neha Parikh,1 William G Kramer,2 Varun Khurana,1 Christina Cognata Smith,1 Santosh Vetticaden,1 1INSYS Therapeutics, Inc., Chandler, AZ, USA; 2Kramer Consulting LLC, North Potomac, MD, USA Background: Dronabinol, a pharmaceutical Δ-9-tetrahydrocannabinol, was originally developed as an oral capsule. This study evaluated the bioavailability of a new formulation, dronabinol oral solution, versus a dronabinol capsule formulation. Methods: In an open-label, four-period, single-dose, crossover study, healthy volunteers were randomly assigned to one of two treatment sequences (T-R-T-R and R-T-R-T; T = dronabinol 4.25 mg oral solution and R = dronabinol 5 mg capsule under fasted conditions, with a minimum 7-day washout period between doses. Analyses were performed on venous blood samples drawn 15 minutes to 48 hours postdose, and dronabinol concentrations were assayed by liquid chromatography–tandem mass spectrometry. Results: Fifty-one of 52 individuals had pharmacokinetic data for analysis. The 90% confidence interval of the geometric mean ratio (oral solution/capsule for dronabinol was within the 80%–125% bioequivalence range for area under the plasma concentration–time curve (AUC from time zero to last measurable concentration (AUC0–t and AUC from time zero to infinity (AUC0–∞. Maximum plasma concentration was also bioequivalent for the two dronabinol formulations. Intraindividual variability in AUC0–∞ was >60% lower for dronabinol oral solution 4.25 mg versus dronabinol capsule 5 mg. Plasma dronabinol concentrations were detected within 15 minutes postdose in 100% of patients when receiving oral solution and in <25% of patients when receiving capsules. Conclusion: Single-dose dronabinol oral solution 4.25 mg was bioequivalent to dronabinol capsule 5 mg under fasted conditions. Dronabinol oral solution formulation may provide an easy-to-swallow administration option with lower intraindividual variability as well as

  12. Simulation and assessment of ion kinetic effects in a direct-drive capsule implosion experiment

    CERN Document Server

    Le, Ari; Schmitt, M J; Herrmann, H W; Batha, S H

    2016-01-01

    The first simulations employing a kinetic treatment of both fuel and shell ions to model inertial confinement fusion experiments are presented, including results showing the importance of kinetic physics processes in altering fusion burn. A pair of direct drive capsule implosions performed at the OMEGA facility with two different gas fills of deuterium, tritium, and helium-3 are analyzed. During implosion shock convergence, highly non-Maxwellian ion velocity distributions and separations in the density and temperature amongst the ion species are observed. Diffusion of fuel into the capsule shell is identified as a principal process that degrades fusion burn performance.

  13. Safety evaluation for packaging (onsite) for cesium chloride capsules with type W overpacks

    Energy Technology Data Exchange (ETDEWEB)

    McCoy, J.C.

    1997-09-15

    This Safety Evaluation for Packaging (SEP) documents the evaluation of a new basket design and overpacked cesium chloride capsule payload for the Beneficial Uses Shipping System (BUSS) Cask in accordance with the onsite transportation requirements of the Hazardous Material Packaging and Shipping manual, WHC-CM-2-14. This design supports the one-time onsite shipment of 16 cesium chloride capsules with Type W overpacks from the 324 Building to the 224T Building at the Waste Encapsulation and Storage Facility (WESF). The SEP is valid for a one-time onsite shipment or until August 1, 1998, whichever occurs first.

  14. Safety analysis report for packaging: the ORNL in-pile capsule shipping cask

    Energy Technology Data Exchange (ETDEWEB)

    Evans, J.H.; Chipley, K.K.; Haynie, C.B.; Crowley, W.K.; Just, R.A.

    1977-11-01

    The ORNL in-pile capsule shipping cask is used to transport irradiated experimental capsules and spent fuel elements. The cask was analytically evaluated to determine its compliance with the applicable regulations governing containers in which radioactive materials are transported. Computational procedures were used to determine the structural integrity and thermal behavior of the cask relative to the general standards for normal conditions of transport and the standards for the hypothetical accident conditions. The results of the evaluation show that the cask is in compliance with the applicable regulations.

  15. Treatment Approach to Small Inadvertent Injury of the Crystalline Lens Anterior Capsule During Iridodialysis Repair Surgery

    Directory of Open Access Journals (Sweden)

    Gökçen Gökçe

    2013-01-01

    Full Text Available A 22-year-old man presented to our ophthalmology department with photophobia. On ophthalmic examination, iridodialysis secondary to blunt trauma that occurred 5 years ago was diagnosed. During iridodialysis repair surgery, long curved double-armed needle of 10-0 polypropylene suture (PC-9 inserted into the 19 gauge side port turned down inadvertently by its own weight, resulting in crystalline lens anterior capsule perforation. Postoperative clinical observation revealed no lens opacification affecting visual acuity. This case report showed that lens aspiration surgery should be postponed if the capsule injury is small.(Turk J Ophthalmol 2013; 43: 61-3

  16. Simulation and assessment of ion kinetic effects in a direct-drive capsule implosion experiment

    Science.gov (United States)

    Le, A.; Kwan, T. J. T.; Schmitt, M. J.; Herrmann, H. W.; Batha, S. H.

    2016-10-01

    The first simulations employing a kinetic treatment of both fuel and shell ions to model inertial confinement fusion experiments are presented, including results showing the importance of kinetic physics processes in altering fusion burn. A pair of direct drive capsule implosions performed at the OMEGA facility with two different gas fills of deuterium, tritium, and helium-3 are analyzed. During implosion shock convergence, highly non-Maxwellian ion velocity distributions and separations in the density and temperature amongst the ion species are observed. Diffusion of fuel into the capsule shell is identified as a principal process that degrades fusion burn performance.

  17. End-range mobilization techniques in adhesive capsulitis of the shoulder joint: a multiple-subject case report.

    NARCIS (Netherlands)

    Vermeulen, H.M.; Obermann, W.R.; Burger, B.J.; Kok, G.J.; Rozing, P.M.; Ende, C.H.M. van den

    2000-01-01

    BACKGROUND AND PURPOSE: The purpose of this case report is to describe the use of end-range mobilization techniques in the management of patients with adhesive capsulitis. CASE DESCRIPTION: Four men and 3 women (mean age=50.2 years, SD=6.0, range=41-65) with adhesive capsulitis of the glenohumeral j

  18. In-the-bag decentration of a hydrophilic radially asymmetric multifocal intraocular lens secondary to capsule contraction.

    NARCIS (Netherlands)

    Linden, J.W.M. van der; Meulen, I.J. van der; Mourits, M.P.; Lapid-Gortzak, R.

    2013-01-01

    We report a case of in-the-bag decentration and tilt of a hydrophilic rotationally asymmetric multifocal intraocular lens (IOL) of the M Plus type secondary to capsule contraction. After uneventful surgery and follow-up for 3 months, progressive decentering and tilting of the IOL secondary to capsul

  19. Design and manufacturing of non-instrumented capsule for advanced PWR fuel pellet irradiation test in HANARO

    Energy Technology Data Exchange (ETDEWEB)

    Kim, D. H.; Lee, C. B.; Song, K. W. [Korea Atomic Energy Research Institute, Taejeon (Korea)

    2002-04-01

    This project is preparing to irradiation test of the developed large grain UO{sub 2} fuel pellet in HANARO for pursuit fuel safety and high burn-up in 'Advanced LWR Fuel Technology Development Project' as a part Nuclear Mid and Long-term R and D Program. On the basis test rod is performed the nuclei property and preliminary fuel performance analysis, test rod and non-instrumented capsule are designed and manufactured for irradiation test in HANARO. This non-instrumented irradiation capsule of Advanced PWR Fuel pellet was referred the non-instrumented capsule for an irradiation test of simulated DUPIC fuel in HANARO(DUPIC Rig-001) and 18-element HANARO fuel, was designed to ensure the integrity and the endurance of non-instrumented capsule during the long term(2.5 years) irradiation. To irradiate the UO{sub 2} pellets up to the burn-up 70 MWD/kgU, need the time about 60 months and ensure the integrity of non-instrumented capsule for 30 months until replace the new capsule. This non-instrumented irradiation capsule will be based to develope the non-instrumented capsule for the more long term irradiation in HANARO. 22 refs., 13 figs., 5 tabs. (Author)

  20. Evidence of binary division in mature central capsules of a collosphaerid colonial radiolarian: Implications for shell ontogenetic patterns in modern and fossil species

    Digital Repository Service at National Institute of Oceanography (India)

    Anderson, O.R.; Gupta, S.M.

    Evidence is presented from fossil shells and living species of the colonial radiolarian Acrosphaera that maturer central capsules with shells can produce daughter central capsules and shells by binary fission. These data indicate that in colonial...

  1. Capsule of parotid gland tumor: evaluation by 3.0 T magnetic resonance imaging using surface coils

    Energy Technology Data Exchange (ETDEWEB)

    Ishibashi, Mana; Fujii, Shinya; Nishihara, Keisuke; Matsusue, Eiji; Kodani, Kazuhiko; Kaminou, Toshio; Ogawa, Toshihide (Div. of Radiology, Dept. of Pathophysiological and Therapeutic Science, Tottori Univ. Faculty of Medicine, Tottori (Japan)), e-mail: ishibashi-ttr@umin.ac.jp; Kawamoto, Katsuyuki (Div. of Otolaryngology, Head and Neck Surgery, Dept. of Medicine of Sensory and Motor Organs, Tottori Univ. Faculty of Medicine, Tottori (Japan))

    2010-12-15

    Background: Magnetic resonance (MR) imaging of parotid gland tumors has been widely reported, although few reports have evaluated the capsule of parotid gland tumors in detail. Purpose: To evaluate the diagnostic usefulness of 3.0 T MR imaging with surface coils for detection of the parotid gland tumor capsule, and to clarify the characteristics of the capsules. Material and Methods: Seventy-eight patients with parotid gland tumors (63 benign and 15 malignant) were evaluated. Axial and coronal T2-weighted and contrast-enhanced T1-weighted images were obtained using a 3.0 T MR scanner with 70 mm surface coils. It was retrospectively assessed whether each parotid gland tumor was completely surrounded by a capsule. The capsule was classified as regular or irregular in terms of capsular thickness, and as none, mildly, or strongly enhancing in terms of contrast enhancement. Visual interpretations were compared with histopathological findings to evaluate the diagnostic ability of MR imaging to detect parotid gland tumor capsules. Statistical evaluation was conducted concerning the presence of capsules, capsular irregularity, and the difference in contrast enhancement between benign and malignant tumors, and that between pleomorphic adenomas and Warthin's tumors. Results: Capsules completely surrounding the tumor on MR imaging yielded a sensitivity of 87.7% (50/57), specificity of 90.5% (19/21), and accuracy of 88.5% (69/78). Benign tumors had a capsule completely surrounding the tumor significantly more often than malignant tumors (P = 0.009). Concerning capsular irregularity, malignant tumors tended to have more irregular capsules than benign tumors, although there were no significant differences. The capsules of malignant tumors enhanced significantly more strongly than those of benign tumors (P = 0.018). Conclusion: 3.0 T MR imaging using surface coils could correctly depict parotid gland tumor capsules in most cases. Most benign and some malignant tumors had

  2. Synthesis of "click" alginate hydrogel capsules and comparison of their stability, water swelling, and diffusion properties with that of Ca(+2) crosslinked alginate capsules.

    Science.gov (United States)

    Breger, Joyce C; Fisher, Benjamin; Samy, Raghu; Pollack, Steven; Wang, Nam Sun; Isayeva, Irada

    2015-07-01

    Ionically crosslinked alginate hydrogels have been extensively explored for encapsulation and immunoisolation of living cells/tissues to develop implantable cell therapies, such as islet encapsulation for bioartificial pancreas. Chemical instability of these hydrogels during long-term implantation hinders the development of viable cell therapy. The exchange between divalent crosslinking ions (e.g., Ca(+2) ) with monovalent ions from physiological environment causes alginate hydrogels to degrade, resulting in exposure of the donor tissue to the host's immune system and graft failure. The goal of this study was to improve stability of alginate hydrogels by utilizing covalent "click" crosslinking while preserving other biomedically viable hydrogel properties. Alginate was first functionalized to contain either pendant alkyne or azide functionalities, and subsequently reacted via "click" chemistry to form "click" gel capsules. Alginate functionalization was confirmed by NMR and gel permeation chromatography. When compared with Ca(+2) capsules, "click" capsules exhibited superior stability in ionic media, while showing higher permeability to small size diffusants and similar molecular weight cut-off and water swelling. Physicochemical properties of "click" alginate hydrogels demonstrate their potential utility for therapeutic cell encapsulation and other biomedical applications.

  3. Current Clinical Indications for Small Bowel Capsule Endoscopy.

    Science.gov (United States)

    Rosa, Bruno; Cotter, José

    2015-01-01

    Introdução: A enteroscopia por cápsula é o exame de primeira linha no diagnóstico de diversas patologias do intestino delgado. Este artigo tem por objectivo rever e analisar criticamente as indicações actuais para enteroscopia por cápsula na prática clínica. Material e Métodos: Revisão bibliográfica suportada em artigos indexados na PubMed. Resultados e Discussão: A enteroscopia por cápsula permite a avaliação não invasiva da mucosa do intestino delgado, com elevado rendimento diagnóstico. Em doentes com hemorragia digestiva de causa obscura, o rendimento da enteroscopia por cápsula aumenta quando realizada precocemente após o evento hemorrágico. O tratamento das angiectasias com enteroscopia assistida por balão permite diminuir a recidiva hemorrágica, enquanto o risco de recidiva em doentes com enteroscopia por cápsula 'negativa' é controverso. A entero-TC/entero-RM podem superiorizar-se à enteroscopia por cápsula no diagnóstico de alguns tumores. O 'Smooth Protruding Index on Capsule Endoscopy' (score SPICE) auxilia na diferenciação entre verdadeiros tumores submucosos e abaulamentos não patológicos. A enteroscopia por cápsula é valiosa em doentes com suspeita de doença de Crohn quando a ileocolonoscopia não é diagnóstica, permitindo também estadiar a extensão e actividade das lesões em doentes com diagnóstico prévio de doença de Crohn, com potenciais implicações prognósticas e terapêuticas. A enteroscopia por cápsula permite ainda o diagnóstico de complicações em doentes com doença celíaca refractária. Conclusões: Actualmente, a importãncia da enteroscopia por cápsula é reconhecida no contexto da hemorragia digestiva de causa obscura e/ou suspeita de tumores do intestino delgado, bem como na suspeita de doença de Crohn ou em doentes com doença de Crohn conhecida para determinar a localização, extensão e actividade da doença, e ainda para a investigação de doentes com doença celíaca refractária.

  4. Pair collisions of fluid-filled elastic capsules in shear flow: Effects of membrane properties and polymer additives

    Science.gov (United States)

    Pranay, Pratik; Anekal, Samartha G.; Hernandez-Ortiz, Juan P.; Graham, Michael D.

    2010-12-01

    The dynamics and pair collisions of fluid-filled elastic capsules during Couette flow in Newtonian fluids and dilute solutions of high-molecular weight (drag-reducing) polymers are investigated via direct simulation. Capsule membranes are modeled using either a neo-Hookean constitutive model or a model introduced by Skalak et al. ["Strain energy function of red blood-cell membranes," Biophys. J. 13, 245 (1973)], which includes an energy penalty for area changes. This model was developed to capture the elastic properties of red blood cells. Polymer molecules are modeled as bead-spring trimers with finitely extensible nonlinearly elastic springs; parameters were chosen to loosely approximate 4000 kDa poly(ethylene oxide). Simulations are performed with a novel Stokes flow formulation of the immersed boundary method for the capsules, combined with Brownian dynamics for the polymer molecules. The results for isolated capsules in shear indicate that at the very low concentrations considered here, polymers have a little effect on the capsule shape. In the case of pair collisions, the effect of polymer is strongly dependent on the elastic properties of the capsules' membranes. For neo-Hookean capsules or for Skalak capsules with only a small penalty for area change, the net displacement in the gradient direction after collision is virtually unaffected by the polymer. For Skalak capsules with a large penalty for area change, polymers substantially decrease the net displacement when compared to the Newtonian case and the effect is enhanced upon increasing the polymer concentration. The differences between the polymer effects in the various cases are associated with the extensional flow generated in the region between the capsules as they leave the collision. The extension rate is highest when there is a strong resistance to a change in the membrane area and is substantially decreased in the presence of polymer.

  5. Capsule expression in Streptococcus mitis modulates interaction with oral keratinocytes and alters susceptibility to human antimicrobial peptides.

    Science.gov (United States)

    Rukke, H V; Engen, S A; Schenck, K; Petersen, F C

    2016-08-01

    Streptococcus mitis is a colonizer of the oral cavity and the nasopharynx, and is closely related to Streptococcus pneumoniae. Both species occur in encapsulated and unencapsulated forms, but in S. mitis the role of the capsule in host interactions is mostly unknown. Therefore, the aim of this study was to examine how capsule expression in S. mitis can modulate interactions with the host with relevance for colonization. The S. mitis type strain, as well as two mutants of the type strain, an isogenic capsule deletion mutant, and a capsule switch mutant expressing the serotype 4 capsule of S. pneumoniae TIGR4, were used. Wild-type and capsule deletion strains of S. pneumoniae TIGR4 were included for comparison. We found that capsule production in S. mitis reduced adhesion to oral and lung epithelial cells. Further, exposure of oral epithelial cells to encapsulated S. mitis resulted in higher interleukin-6 and CXCL-8 transcription levels relative to the unencapsulated mutant. Capsule expression in S. mitis increased the sensitivity to human neutrophil peptide 1-3 but reduced the sensitivity to human β-defensin-3 and cathelicidin. This was in contrast with S. pneumoniae in which capsule expression has been generally associated with increased sensitivity to human antimicrobial peptides (AMPs). Collectively, these findings indicate that capsule expression in S. mitis is important in modulating interactions with epithelial cells, and is associated with increased or reduced susceptibility to AMPs depending on the nature of the AMP.

  6. Feasibility of capsule endoscopy in elderly patients with obscure gastrointestinal bleeding. An up-to-date report

    Directory of Open Access Journals (Sweden)

    Orlando G

    2012-11-01

    Full Text Available Abstract Background Anemia is the most common hematologic abnormality in older populations. Furthermore, iron deficiency anemia is common and merits investigation and treatment, as it usually results from chronic occult bleeding from the gastrointestinal tract. In view of a wide use of capsule endoscopy as a diagnostic procedure for occult gastrointestinal bleeding and of the growth of aging population, we performed a literature review about the feasibility of capsule endoscopy in the elderly. Methods We conducted a literature search in the PubMed database in July 2012, and all English-language publications on capsule endoscopy in elderly patients since 2005 were retrieved. The potential original articles mainly focused on obscure gastrointestinal bleeding were all identified and full texts were obtained and reviewed for further hand data retrieving. Results We retrieved only six papers based on different primary end-points. Four were retrospective non randomized studies and two were prospective non randomized studies. In the end 65, 70, 80 and 85 years were used as an age cut-off. All studies evaluate the diagnostic yield of capsule endoscopy in iron deficiency anemia. Only three studies assess the feasibility of capsule examination of the elderly. Conclusions Iron deficiency anemia in the elderly with or without obscure gastrointestinal bleeding is the major indication for capsule endoscopy after a negative esophago-gastro-duodenoscopy and colonoscopy. It is safe and effective to identify a small bowel pathology without a great discomfort for the elderly. Inability to swallow the capsule, battery failure before capsule reaches the cecum, and capsule retention are some of the important problems associated with capsule endoscopy in elderly as well as in younger patients.

  7. Timed Release of Valsartan from Programmable Release Capsules: Importance of Plasticizers

    Directory of Open Access Journals (Sweden)

    Usha Yogendra Nayak*

    2013-12-01

    Full Text Available The objective of the present study was to evaluate the effect of different plasticizers on the ethylcellulose coatings of capsules and its timed release characteristics. Various plasticizers such as dibutyl phthalate (DBP, triacetin (TA, glycerol, triethyl citrate (TEC, polyethylene glycol-4000 and polyethylene glycol-6000 (PEG were studied. The physicochemical properties of the casted polymeric films such as mechanical resistance, water uptake and dry weight loss were determined. Also the type and concentration of plasticizer on timed release of the capsule was studied. The drug release was found to be strongly dependent on the type of plasticizer and was in the order of GY>TA>PEG 6000>PEG 4000>TEC>DBP. Capsules coated with hydrophobic DBP (5% showed good release with a lag time of 6 ± 0.5 h. DBP provided mechanically resistant coatings on the capsule and remained within the polymeric films without leaching upon exposure to the release media which helped in maintaining the lag time.

  8. Reaction-in-flight neutrons as a signature for shell mixing in National Ignition Facility capsules

    Science.gov (United States)

    Hayes, A. C.; Bradley, P. A.; Grim, G. P.; Jungman, Gerard; Wilhelmy, J. B.

    2010-01-01

    Analytic calculations and results from computational simulations are presented that suggest that reaction-in-flight (RIF) neutrons can be used to diagnose mixing of the ablator shell material into the fuel in deuterium-tritium (DT) capsules designed for the National Ignition Facility (NIF) [J. A. Paisner, J. D. Boyes, S. A. Kumpan, W. H. Lowdermilk, and M. S. Sorem, Laser Focus World 30, 75 (1994)]. Such mixing processes in NIF capsules are of fundamental physical interest and can have important effects on capsule performance, quenching the total thermonuclear yield. The sensitivity of RIF neutrons to hydrodynamical mixing arises through the dependence of RIF production on charged-particle stopping lengths in the mixture of DT fuel and ablator material. Since the stopping power in the plasma is a sensitive function of the electron temperature and density, it is also sensitive to mix. RIF production scales approximately inversely with the degree of mixing taking place, and the ratio of RIF to down-scattered neutrons provides a measure of the mix fraction and/or the mixing length. For sufficiently high-yield capsules, where spatially resolved RIF images may be possible, neutron imaging could be used to map RIF images into detailed mix images.

  9. Wireless Capsule Endoscopy for Obscure Gastrointestinal Bleeding: Single Center, One Year Experience

    Directory of Open Access Journals (Sweden)

    Shou-jiang Tang

    2004-01-01

    Full Text Available BACKGROUND: Wireless capsule endoscopy (CE is increasingly being used in the investigation of obscure gastrointestinal (GI bleeding, but some studies have found that many of the bleeding lesions recognized by this technique are within the reach of conventional endoscopy.

  10. On the biology of the bony otic capsule and the pathogenesis of otosclerosis

    DEFF Research Database (Denmark)

    Bloch, Sune Land

    2012-01-01

    In human otosclerosis, focal pathological bone remodeling occurs in significant amounts inside the normally anti-resorptive perilabyrinthine domain of the bony otic capsule. Otosclerosis causes hearing loss in 0.2-0.5% of the population by ankylosis of the footplate. The disease cannot be predicted...

  11. 2010-11 Overview of M-DCPS' Academic Performance. Information Capsule. Volume 1101

    Science.gov (United States)

    Blazer, Christie

    2011-01-01

    This Information Capsule answers the most frequently asked questions about M-DCPS' academic performance during the 2010-11 school year. M-DCPS earned a performance grade of "B" in 2011 and was only six points short of an "A." Over half of the District's schools (56 percent) earned an "A." In Writing, the percent of…

  12. Effects of alga polysaccharide capsule shells on in-vivo bioavailability and disintegration

    Institute of Scientific and Technical Information of China (English)

    LI Ting; GUO Shuju; MA Lin; YUAN Yi; HAN Lijun

    2012-01-01

    Gelatin has been used in hard capsule shells for more than a century,and some shortcomings have appeared,such as high moisture content and risk of transmitting diseases of animal origin to people.Based on available studies regarding gelatin and vegetable shells,we developed a new type of algal polysaccharide capsule (APPC) shells.To test whether our products can replace commercial gelatin shells,we measured in-vivo plasma concentration of 12 selected volunteers with a model drug,ibuprofen,using high performance liquid chromatography (HPLC),by calculating the relative bioavailability of APPC and Qualicaps(R) referenced to gelatin capsules and assessing bioequivalence of the three types of shells,and calculated pharmacokinetic parameters with the software DAS 2.0 (China).The results show that APPC shells possess bioequivalence with Qualicaps(R) and gelatin shells.Moreover,the disintegration behavior of four types of shells (APPC,Vegcaps(R),Qualicaps(R) and gelatin shells) with the content of lactose and radioactive element (99mTc) was observed via gamma-scintigraphic images.The bioavailability and gamma-scintigraphic studies showed that APPC was not statistically different from other vegetable and gelatin capsule shells with respect to in-vivo behavior.Hence,it can be concluded that APPCs are exchangeable with other vegetable and gelatin shells.

  13. Chemistry and biocompatibility of alginate-PLL capsules for immunoprotection of mammalian cells

    NARCIS (Netherlands)

    de Vos, P; Hoogmoed, CG; Busscher, HJ

    2002-01-01

    Transplantation of encapsulated living cells is a promising approach for the treatment of a wide variety of diseases. Large-scale application of the technique, however, is hampered by insufficient biocompatibility of the capsules. In order to get means to study factors influencing the biocompatibili

  14. Histochemistry and histoenzymology of the hydatid cyst (Echinococcus granulosus Batsch, 1786). II. Scolices and brood capsules.

    Science.gov (United States)

    Reissenweber, N J; Vercelli-Retta, J; Siri, A M; Lozano, W

    1975-12-11

    Scolices and brood capsules of healthy hydatid cysts from lungs of human patients were studied with histochemical and histoenzymatic methods. The subtegumental and flame cells were sepcially rich in glycogen, RNA and some dehydrogenases such as SDH, MDH, NADH-reductase and G-6-PDH. The rostellar zone or invaginated pole, an area of marked contractile movements, showed intense activity in ATP'ase and simple esterase. The so-called excretory pole shows strong activity in simple esterases, lipase, beta-HBH, alpha-GDH and NADPH-reductase. Lipids are also abundant in this zone implying the important role of this metabolic path in the development of the parasite. Intense activity in alkaline phosphatase was observed in cells associated to the calcereous corpuscles. The largest corpuscles were devoid of enzymatic activity. The enzyme could play some role in the calcification of the corpuscles. Wide enzymatic variations are described according to morphology being orthoscolices the most rich in enzyme activity. Accumulations of small cells surrounded by specialized cells on the germinal membrane are interpreted as the origin or "embryo" of brood capsules. Some enzymes detected in the wall of mature brood capsules depicted alternating types of cells. Some of them are positive for ATP'ase that may be related to active transport of substances across the brood capsule wall. The intenst ATP'ase activity at the stalks of scolices may be similarly interpreted. However, a miosine-like activity is a more feasible explanation since this area showed striking contractile movements in vivo.

  15. Ingestible Wireless Capsule Technology: A Review of Development and Future Indication

    Directory of Open Access Journals (Sweden)

    M. R. Basar

    2012-01-01

    Full Text Available Ingestible wireless capsule endoscopy (WCE is the one and only painless, effective, novel, diagnostic technology for inspecting the entire gastrointestinal (GI tract for various diseases, such as obscure gastrointestinal bleeding (OGIB, tumors, cancer, Crohn’s disease, and celiac disease. Since the development of this technology, several companies have made remarkable improvements in their clinical products, but there are still some limitations that relate to the use of conventional wired endoscopy. Some of the major limitations that currently impede its wider application include its inability to repeat the view of critical areas, working time constraints, and poor image resolution. Many research groups currently are working on ways to solve these limitations. Presently, developing the ability to control the movement of the capsule, increasing its image transmission speed, and obtaining high-quality images are the main issues in the research area. A complex capsule with some therapeutic tools for the treatment of diseases of the GI tract also is at the beginning of development for the next generation of an active medical robot. In this paper, we report the status of several activities related to WCE, including improvement of capsule technology, research progress, technical challenges, and key indicators concerning the next-generation, active, medical robot.

  16. List of egg-capsules of Rajidae washed ashore in the Netherlands

    NARCIS (Netherlands)

    Lacourt, A.W.

    1937-01-01

    Egg-capsules of the following four Raja-species have been known with certainty for many years from the shores of the Netherlands: Raja clavata Linnaeus, Raja montagui Fowler (Raja maculata Montagu), Raja radiata Donovan, and Raja batis Linnaeus. It is therefore of interest to note that from 1931 to

  17. Oil encapsulation in core-shell alginate capsules by inverse gelation. I: dripping methodology.

    Science.gov (United States)

    Martins, Evandro; Renard, Denis; Adiwijaya, Zenia; Karaoglan, Emre; Poncelet, Denis

    2017-02-01

    The production of capsules by inverse gelation consists of adding dropwise oil containing calcium dispersion into an alginate bath. A dripping technique to produce capsules from oil-in-water (O/W) emulsions was proposed by Abang. However, little is known about the oil encapsulation using water-in-oil (W/O) emulsions. This work aims to develop a new method of W/O emulsions encapsulation by inverse gelation. The success of the W/O emulsion encapsulation is due to three factors: 1) use of an emulsion with moderate stability (50 min); 2) production of an emulsion with at least 90 g/L of CaCl2 and 3) addition of ethanol (20% v/v) into the alginate bath. Both wet and dry capsules were obtained with a spherical shape with diameters of 7 and 3.6 mm, respectively. All volume of oil was encapsulated and the oil loading in the wet and dry capsules was of 23 and 68% v/v, respectively.

  18. Developing hydroxypropyl methylcellulose/hydroxypropyl starch blends for use as capsule materials.

    Science.gov (United States)

    Zhang, Liang; Wang, Yanfei; Liu, Hongsheng; Yu, Long; Liu, Xingxun; Chen, Ling; Zhang, Nouzi

    2013-10-15

    Blends of hydroxypropyl methylcellulose (HPMC) with up to 70% hydroxypropyl starch (HPS) were developed for use as hard capsule materials. Polyethylene glycol (PEG) was used as both a plasticizer and a compatibilizer in the blends. In order to prepare hard capsules for pharmaceutical application using the well-established method of dipping stainless steel mold pins into solution then drying at certain temperature, equilibrated solutions with higher solids concentration (20%) were investigated and developed. The solutions, films and capsules of the different HPMC/HPS blends were characterized by viscosity, transparency, tensile testing, water contact angle, SEM, as well as FTIR. The results showed that the blend system is immiscible but compatible in certain degree, especially after adding PEG. The hydroxypropylene groups grafted onto both cellulose and starch improved the compatibility between the HPMC and the modified starch. The higher viscosity of starch at lower temperature improved the viscosity balance of the system, which enlarged the operation window for the dipping-drying technique. The PEG increased the transparency and toughness of the various blends. By optimizing temperature and incubation time to control viscosity, capsules of various blends were successfully developed.

  19. MORPHOLOGICAL ASPECTS OF HUMAN LENS CAPSULES - A COMPARATIVE LM, SEM AND TEM EXAMINATION

    NARCIS (Netherlands)

    JONGEBLOED, WL; KALICHARAN, D; LOS, LI; VANDERVEEN, G; WORST, JGF

    1991-01-01

    Lens capsules of patients of advanced age, obtained after extracapsular cataract surgery, were carefully prepared for a combined LM, TEM and SEM investigation, after preliminary washing and mounting onto a holder in a buffer solution. After pre-fixation with GA, samples were postfixed for LM/TEM and

  20. Chitosan Derivatives/Calcium Carbonate Composite Capsules Prepared by the Layer-by-Layer Deposition Method

    Directory of Open Access Journals (Sweden)

    Takashi Sasaki

    2008-01-01

    Full Text Available Core/shell capsules composed of calcium carbonate whisker core (rod-like shape and chitosan/chitosansulfate shell were prepared by the layer-by-layer deposition technique. Two chitosan samples of different molecular weights (Mw=9.7×104 and 1.09×106g·mol-1 were used as original materials. Hollow capsules were also obtained by dissolution of the core in hydrochloric acid. Electron microscopy revealed that the surface of the shell is rather ragged associated with some agglomerates. The shell thickness l obeys a linear relation with respect to the number of deposited layers m as l=md+a(a>0. The values of d (thickness per layer were 4.0 and 1.0 nm for the higher and lower Mw chitosan materials, respectively, both of which are greater than the thickness of the monolayer. The results suggest that the feature of the deposition does not obey an ideal homogeneous monolayer-by-monolayer deposition mechanism. Shell crosslinked capsules were also prepared via photodimerization reaction of cinnamoyl groups after a deposition of cinnamoyl chitosan to the calcium carbonate whisker core. The degree of crosslink was not enough to stabilize the shell structure, and hollow capsule was not obtained.

  1. [Clinical observation on treatment of mycotic vaginitis with Sophora gel combined with Fluconazole capsules].

    Science.gov (United States)

    Wang, Na-mei; Cui, Lin; Ma, Chun-fen; Wang, Hui-xia

    2015-03-01

    Mycotic vaginitis is a common and frequently-occurring gynaecopathia and easy to attack repeatedly, so painful to patients. In this study, the authors observed the clinical efficacy of Sophora gel combined with Fluconazole capsules in treating mycotic vaginitis, in order to seek an effective method for treating mycotic vaginitis. Totally 85 patients with mycotic vaginitis treated in our hospital between December 2012 and July 2014 were randomly divided into the treatment group (43 patients) and the control group (42 patients). The treatment group was given vaginally Sophora gel (one piece every night for 14 days) and orally Fluconazole capsules (150 mg, once every three days, four times in total); The control group was only administered with Fluconazole capsules. The total efficacy, cure rate, recurrence rate and clinical symptom improvements of the two groups were observed. The results show that the total efficacy, the cure rate and the recurrence rate of the treatment group vs. the control group were respectively 97.7%, 90.7% and 2.6% vs. 83.3%, 71.4% and 20.0%, with statistical significance in their differences (P Fluconazole capsules can improve antifungal activity of drugs, relieve clinical symptoms, shorten the course of disease, enhance the cure rate and reduce the recurrence rate; So this therapy can be widely applied in clinic.

  2. Investigation of release pattern of a drug with low solubility through asymmetric membrane capsules

    Directory of Open Access Journals (Sweden)

    P K Sahoo

    2013-01-01

    Full Text Available Asymmetric membrane capsules are a type of osmotic drug delivery systems. They are nondisintegrating capsules, which utilize osmotic pressure to drive the drug outwards for controlled delivery. Preceded by systems such as elementary osmotic pump, controlled porosity osmotic pump, single composition osmotic tablet this system has the advantage of simple and easy fabrication as it obviates the necessity of drilling an orifice into the drug delivery system. Moreover; it seems to be a low-cost alternative. The cellulose acetate capsule shell, on coming in contact with the aqueous medium shows in situ pore formation due to leaching of pore formers, which have been incorporated into the shell forming solution. Until date, a number of osmotic agents to the likes of sodium chloride, mannitol has been used to build up osmotic pressure inside the cell. The system is endowed with high water flux, which is a plus point for delivery of poorly soluble drugs like cephalexin in terms of increasing release rates. Studies envisaged in this research include the effect of different concentrations of different pore formers on in vitro drug release as well as the effect of modification of inner contents of the capsule. The system was successful in producing a gradual release of drug for 12 h.

  3. A pharmacokinetic comparison of the modified release capsule and a plain tablet formulation of mebeverine.

    Science.gov (United States)

    Winsemius, A; Meuwsen, I M; Boon, C; van der Laan, A; Brekle, A; de Vries, M

    2002-11-01

    This study was conducted to compare the pharmacokinetic properties of the modified release 200 mg capsule of mebeverine and the plain 135 mg tablet of mebeverine after single and multiple doses in 12 healthy subjects in a randomised, crossover design. Single doses were given on days 1 and 7 and multiple doses (200 mg b.i.d. for the capsule and 135 mg t.i.d. for the tablet) on days 2-6 of the study. The 200 mg modified release capsule of mebeverine has extended release properties, as indicated by a lower Cmax, a later tmax and a longer elimination half-life than the plain tablet, while the bioavailability is optimal. No significant accumulation occurs after multiple doses of either formulation. The twice-daily dosage regimen of the 200 mg modified release capsule is a good alternative to the three times daily dosage regimen of the 135 mg plain tablet, because the reduced daily intake is likely to benefit patient compliance.

  4. [Papaver bracteatum, influence of cold treatment and cloning on Thebaine content of the capsules.].

    Science.gov (United States)

    Bastart-Malsot, M; Paris, M

    1982-05-01

    A high heterogeneity of thébaïne yields is revealed in capsules of plants obtained from seeds cultivated in a phytotron. Clonage methods could be used to perform culture. Heterogeneity of plants hides influence of low temperature on thebaïne production. With clone this influence appears to be slight but appreciable.

  5. TAGS 85/2N RTG Power for Viking Lander Capsule

    Science.gov (United States)

    1969-08-01

    Results of studies performed by Isotopes, Inc., Nuclear Systems Division, to optimize and baseline a TAGS 85/2N RTG for the Viking Lander Capsule prime electrical power source are presented. These studies generally encompassed identifying the Viking RTG mission profile and design requirements, and establishing a baseline RTG design consistent with these requirements.

  6. Investigation of a cuboidal permanent magnet’s force exerted on a robotic capsule

    Directory of Open Access Journals (Sweden)

    Yang W

    2014-08-01

    Full Text Available Wan’an Yang,1 Chengbing Tang,2 Fengqing Qin1 1School of Computer and Information Engineering, Yibin University, Yibin, 2CNPC Chuanqing Geophysical Prospecting Company Research Center Computer Department, Chengdu, Sichuan, People’s Republic of China Abstract: To control and drive a robotic capsule accurately from outside a patient’s body, we present a schema in which the capsule enclosing the imaging device, circuits, batteries, etc is looped by a permanent magnet ring that acts as an actuator. A cuboidal permanent magnet situated outside the patient's body attracts or pushes the magnet ring from different directions to make the capsule move or rotate. A mathematic model of attractive or repulsive force that the cuboidal magnet exerts on the magnet ring is presented for accurate calculation of force. The experiments showed that the measuring force was in agreement with the theoretical one, and the relations between the dimensions of the cuboidal magnet and force are useful to produce a cuboidal magnet with optimal shape to get appropriate force. Keywords: control and drive, robotic capsule, permanent magnet ring, optimal dimension, force model

  7. An improved YEF-DCT based compression algorithm for video capsule endoscopy.

    Science.gov (United States)

    Mostafa, Atahar; Khan, Tareq; Wahid, Khan

    2014-01-01

    Video capsule endoscopy is a non-invasive technique to receive images of intestine for medical diagnostics. The main design challenges of endoscopy capsule are accruing and transmitting acceptable quality images by utilizing as less hardware and battery power as possible. In order to save wireless transmission power and bandwidth, an efficient image compression algorithm needs to be implemented inside the endoscopy electronic capsule. In this paper, an integer discrete-cosine-transform (DCT) based algorithm is presented that works on a low-complexity color-space specially designed for wireless capsule endoscopy application. First of all, thousands of human endoscopic images and video frames have been analyzed to identify special intestinal features present in those frames. Then a color space, referred as YEF, is used. The YEF converter is lossless and takes only a few adders and shift operation to implement. A low-cost quantization scheme with variable chroma sub-sampling options is also implemented to achieve higher compression. Comparing with the existing works, the proposed transform coding based compressor performs strongly with an average compression ratio of 85% and a high image quality index, peak-signal-to-noise ratio (PSNR) of 52 dB.

  8. Mechanical characterization of an unusual elastic biomaterial from the egg capsules of marine snails (Busycon spp.).

    Science.gov (United States)

    Rapoport, H Scott; Shadwick, Robert E

    2002-01-01

    Egg capsule material serves as a putative protection mechanism for developing snail embryos facing the perils of the marine environment. We conducted the first quantitative study of this acellular structural protein with the goals of characterizing its chemical and mechanical properties and the relationship of these properties to its biological protective function. We have found that this protein polymer exhibits long-range elasticity with an interesting recoverable yield evidenced by an order of magnitude decrease in elastic modulus (apparent failure) that begins at 3%-5% strain. This material differs significantly from other common structural proteins such as collagen and elastin in mechanical response to strain. Qualitative similarities in stress/strain behavior to keratin, another common structural protein, are more than coincidental when composition and detailed mechanical quantification are considered. This suggests the possibility of alpha-helical structure and matrix organization that might be similar in these two proteins. Indeed, the egg capsule protein may be closely related to vertebrate keratins such as intermediate filaments. We conclude that while this material's bimodal tensile properties may serve as useful protection against the impact loading egg capsules encounter in the intertidal zone, the full biological importance of these capsules is not known.

  9. Effects of alga polysaccharide capsule shells on in-vivo bioavailability and disintegration

    Science.gov (United States)

    Li, Ting; Guo, Shuju; Ma, Lin; Yuan, Yi; Han, Lijun

    2012-01-01

    Gelatin has been used in hard capsule shells for more than a century, and some shortcomings have appeared, such as high moisture content and risk of transmitting diseases of animal origin to people. Based on available studies regarding gelatin and vegetable shells, we developed a new type of algal polysaccharide capsule (APPC) shells. To test whether our products can replace commercial gelatin shells, we measured in-vivo plasma concentration of 12 selected volunteers with a model drug, ibuprofen, using high performance liquid chromatography (HPLC), by calculating the relative bioavailability of APPC and Qualicaps® referenced to gelatin capsules and assessing bioequivalence of the three types of shells, and calculated pharmacokinetic parameters with the software DAS 2.0 (China). The results show that APPC shells possess bioequivalence with Qualicaps® and gelatin shells. Moreover, the disintegration behavior of four types of shells (APPC, Vegcaps®, Qualicaps® and gelatin shells) with the content of lactose and radioactive element (99mTc) was observed via gamma-scintigraphic images. The bioavailability and gamma-scintigraphic studies showed that APPC was not statistically different from other vegetable and gelatin capsule shells with respect to in-vivo behavior. Hence, it can be concluded that APPCs are exchangeable with other vegetable and gelatin shells.

  10. Colon Capsule Endoscopy: Detection of Colonic Polyps Compared with Conventional Colonoscopy and Visualization of Extracolonic Pathologies

    Directory of Open Access Journals (Sweden)

    Alexander F Hagel

    2014-01-01

    Full Text Available BACKGROUND: Conventional colonoscopy (CC is the gold standard for diagnostic examination of the colon. However, the overall acceptance of this procedure is low due to patient fears of complications or embarrassment. Colon capsule endoscopy (CCE represents a minimally invasive, patient-friendly procedure that offers complete visualization of the entire intestine.

  11. Pharmacokinetic Study on Lovastatin Sustained-release Tablet and Sustained-release Capsule in Begal Dogs

    Institute of Scientific and Technical Information of China (English)

    付琳; 代宗顺; 侯淑贤; 万元胜

    2004-01-01

    This study pharmacokinetically examined the lovastatin sustained-release tablet and sustained release capsule in Beagle dogs. An reversed-phase HPLC method was established for the determination of lovastatin in Beagle dog plasma. Pharmacokinetic findings were compared among three preparation(lovastatin sustained-release tablet, TP; sustained-release capsule, TJ and conventional capsule). Our results showed that the pharmacokinetic parameters in 6 dogs after single-dose oral administration of three perparations were calculated. Tmax , Cmax and MRT revealed significant difference (P<0.05). Relative bioavailability was 111. 5 ± 16. 9 % (TP) and 110.4% ± 9.6%(TJ). The pharmacokinetic parameters in the 6 dogs after multiple-dose oral administration of three perparations, Tmax Cmax MRT and DF had significant difference (P<0. 05); Cav, Cmin and AUC0-24 h displayed no significant difference (P>0.05). It is concluded that the lovastatin sustained-release tablet and sustained-release capsule are able to maintain a sustained-release for 24 h.

  12. Visualizing density perturbations in the capsule shell in NIF implosions near peak velocity

    Science.gov (United States)

    Pickworth, L. A.; Hammel, B. A.; Smalyuk, V. A.; Macphee, A.; Scott, H. A.; Robey, H. F.; Field, J.; Barrios, M.; Regan, S. P.

    2016-10-01

    Engineering features on the capsule (surface roughness, support structures, etc.) can introduce outer surface perturbations that are ultimately detrimental to the performance of the capsule. Recent experiments have assessed minimal support structures and alternate pulse shapes using a re-entrant cone and back lighter that is perturbing to the implosion below radii of 500 μ m. Emission from the hot core, after shock-stagnation and prior to peak velocity (PV), has been used as a self-backlighter, providing a means to sample one side of the capsule at smaller radii. Adding high-Z gas ( 1 % Ar) to the capsule fill in Symcaps (4He), has produced a continuum backlighter with significant increase in emission at hv 8 keV over nominal fills. High-resolution imaging diagnostics with photon energy selectivity form 2D images of the transmitted self-emission, above and below the K-edge of an internally doped Cu layer. We can infer from these images the growth at PV of outer surface perturbations. Prepared by LLNL under Contract DE-AC52-07NA27344. LLNL-ABS-697620.

  13. Engineered Hydrogen-Bonded Glycopolymer Capsules and Their Interactions with Antigen Presenting Cells.

    Science.gov (United States)

    Kempe, Kristian; Xiang, Sue D; Wilson, Paul; Rahim, Md Arifur; Ju, Yi; Whittaker, Michael R; Haddleton, David M; Plebanski, Magdalena; Caruso, Frank; Davis, Thomas P

    2017-02-22

    Hollow glycopolymer microcapsules were fabricated by hydrogen-bonded layer-by-layer (LbL) assembly, and their interactions with a set of antigen presenting cells (APCs), including dendritic cells (DCs), macrophages (MACs), and myeloid derived suppressor cells (MDSCs), were investigated. The glycopolymers were obtained by cascade postpolymerization modifications of poly(oligo(2-ethyl-2-oxazoline methacrylate)-stat-glycidyl methacrylate) involving the modification of the glycidyl groups with propargylamine and the subsequent attachment of mannose azide by copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC). Multilayer assembly of the hydrogen-bonding pair (glycopolymer/poly(methacrylic acid) (PMA)) onto planar and particulate supports (SiO2 particles, d = 1.16 μm) yielded stable glycopolymer films upon cross-linking by CuAAC. The silica (SiO2) particle templates were removed yielding hollow monodisperse capsules, as demonstrated by fluorescence and scanning electron microscopy. Cellular uptake studies using flow cytometry revealed the preferential uptake of the capsules by DCs when compared to MACs or MDSCs. Mannosylated capsules showed a cytokine independent cis-upregulation of CD80 specifically on DCs and a trans-downregulation of PDL-1 on MDSCs. Thus, the glycopolymer capsules may have potential as vaccine carriers, as they are able to upregulate costimulatory molecules for immune cell stimulation on DCs and at the same time downregulate immune inhibitory receptors on suppressor APC such as MDSCs.

  14. A Therapeutic Wireless Capsule for Treatment of Gastrointestinal Haemorrhage by Balloon Tamponade Effect.

    Science.gov (United States)

    Leung, Billy H K; Poon, Carmen C Y; Zhang, Ruikai; Zheng, Y L; Chan, C K W; Chiu, Philip W Y; Lau, James Y W; Sung, Joseph J Y

    2016-07-13

    Wireless capsule endoscope (WCE) is a revolutionary approach to diagnose small bowel pathologies. Currently available WCEs are mostly passive devices with image capturing function only, while on-going efforts have been placed on robotizing WCEs or to enhance them with therapeutic functions. In this paper, the authors present a novel inflatable WCE for haemostasis in the gastrointestinal tracts by balloon tamponade effect.

  15. Asymptomatic carriage of group A streptococcus is associated with elimination of capsule production.

    Science.gov (United States)

    Flores, Anthony R; Jewell, Brittany E; Olsen, Randall J; Shelburne, Samuel A; Fittipaldi, Nahuel; Beres, Stephen B; Musser, James M

    2014-09-01

    Humans commonly carry pathogenic bacteria asymptomatically, but despite decades of study, the underlying molecular contributors remain poorly understood. Here, we show that a group A streptococcus carriage strain contains a frameshift mutation in the hasA gene resulting in loss of hyaluronic acid capsule biosynthesis. This mutation was repaired by allelic replacement, resulting in restoration of capsule production in the isogenic derivative strain. The "repaired" isogenic strain was significantly more virulent than the carriage strain in a mouse model of necrotizing fasciitis and had enhanced growth ex vivo in human blood. Importantly, the repaired isogenic strain colonized the mouse oropharynx with significantly greater bacterial burden and had significantly reduced ability to internalize into cultured epithelial cells than the acapsular carriage strain. We conducted full-genome sequencing of 81 strains cultured serially from 19 epidemiologically unrelated human subjects and discovered the common theme that mutations negatively affecting capsule biosynthesis arise in vivo in the has operon. The significantly decreased capsule production is a key factor contributing to the molecular détente between pathogen and host. Our discoveries suggest a general model for bacterial pathogens in which mutations that downregulate or ablate virulence factor production contribute to carriage.

  16. Molecular Basis for the Recognition of Higher Fullerenes into Ureidopyrimidinone-Cyclotriveratrylene Self-Assembled Capsules.

    Science.gov (United States)

    Huerta, Elisa; Serapian, Stefano Artin; Santos, Eva; Cequier, Enrique; Bo, Carles; de Mendoza, Javier

    2016-09-12

    Fullerenes C60 , C70 , and C84 may be readily encaged within a hydrogen-bonded dimeric capsule, based on two concave cyclotriveratrylene (CTV) scaffolds, each containing three self-complementary 2-ureido-4-[1H]-pyrimidinone (UPy) subunits. NMR spectroscopy and circular dichroism studies, complemented by dispersion-corrected DFT calculations, are reported with the aim of characterizing such capsule-fullerene complexes both structurally and energetically. Six fullerenes are considered: in agreement with experiments, calculations find that encapsulation is most favorable for C84 (on a par with C90 ), and follows the trend C60 capsules are formed by monomers of identical stereochemistry with UPy and the OMe groups of CTV in a mutual anti orientation and UPy-CTV ethylene linkers within the capsular surface plane. Up to C78 , encapsulation is favored by increasing host-guest contacts, but the trend is thereafter increasingly inhibited by growing capsule strain.

  17. Bioequivalence Studies of a Reformulated Dutasteride and Tamsulosin Hydrochloride Combination Capsule and a Commercially Available Formulation.

    Science.gov (United States)

    Kurczewski, Renee; Bowen, Chet; Collins, David; Zhu, John; Serbest, Gulyeter; Manyak, Michael

    2017-01-27

    A dutasteride 0.5 mg and tamsulosin hydrochloride 0.4 mg combination (DTC) capsule (Duodart(®) ) was reformulated to reduce the capsule size and enhance product stability. Bioequivalence of the reformulated DTC capsule with the commercial formulation was evaluated in 2 single-dose, open-label, randomized, 2-way crossover studies in healthy adult male volunteers. Subjects in a fasted or fed state received a single oral dose of either the reformulated DTC or the commercial formulation followed by a 28-day washout period between treatments. Blood samples were taken predose and up to 72 hours postdose for pharmacokinetic (PK) analysis of dutasteride and tamsulosin serum concentrations. From the serum concentration-vs-time data, a noncompartmental method was used to calculate the maximum observed serum concentration (Cmax ) and area under the serum concentration-time curve (AUC0-t ) for dutasteride and tamsulosin, and AUC0-∞ for tamsulosin. The 90% confidence intervals for the ratios of the Cmax and AUC0-t (for dutasteride and tamsulosin) and for AUC0-∞ (for tamsulosin) were all completely contained within the range of 80% to 125%; therefore, the reformulated DTC capsule is bioequivalent to the commercial formulation under both fed and fasted states.

  18. Generation and Beaming of Early Hot Electrons onto the Capsule in Laser-Driven Ignition Hohlraums

    Science.gov (United States)

    Dewald, E. L.; Hartemann, F.; Michel, P.; Milovich, J.; Hohenberger, M.; Pak, A.; Landen, O. L.; Divol, L.; Robey, H. F.; Hurricane, O. A.; Döppner, T.; Albert, F.; Bachmann, B.; Meezan, N. B.; MacKinnon, A. J.; Callahan, D.; Edwards, M. J.

    2016-02-01

    In hohlraums for inertial confinement fusion (ICF) implosions on the National Ignition Facility, suprathermal hot electrons, generated by laser plasma instabilities early in the laser pulse ("picket") while blowing down the laser entrance hole (LEH) windows, can preheat the capsule fuel. Hard x-ray imaging of a Bi capsule surrogate and of the hohlraum emissions, in conjunction with the measurement of time-resolved bremsstrahlung spectra, allows us to uncover for the first time the directionality of these hot electrons and infer the capsule preheat. Data and Monte Carlo calculations indicate that for most experiments the hot electrons are emitted nearly isotropically from the LEH. However, we have found cases where a significant fraction of the generated electrons are emitted in a collimated beam directly towards the capsule poles, where their local energy deposition is up to 10 × higher than the average preheat value and acceptable levels for ICF implosions. The observed "beaming" is consistent with a recently unveiled multibeam stimulated Raman scattering model [P. Michel et al., Phys. Rev. Lett. 115, 055003 (2015)], where laser beams in a cone drive a common plasma wave on axis. Finally, we demonstrate that we can control the amount of generated hot electrons by changing the laser pulse shape and hohlraum plasma.

  19. [Dissolution testing combined with computer simulation technology to evaluate the bioequivalence of domestic amoxicillin capsule].

    Science.gov (United States)

    Pan, Rui-Xue; Gao, Yuan; Chen, Wan-Li; Li, Yu-Lan; Hu, Chang-Qin

    2014-08-01

    Re-evaluation of bioequivalence of generic drugs is one of the key research focus currently. As a means to ensure consistency of the therapeutic effectiveness of drug products, clinical bioequivalence has been widely accepted as a gold standard test. In vitro dissolution testing based on the theory of the BCS is the best alternative to in vivo bioequivalence study. In this article, the conventional dissolution method and flow-through cell method were used to investigate the dissolution profiles of domestic amoxicillin capsules in different dissolution media, and the absorption behavior of the drugs with different release rates (t85% = 15-180 min) in the gastrointestinal tract was predicted by Gastro Plus. The flow-through cell method was thought better to reflect the release characteristics in vivo, and amoxicillin capsules with regard to the release rates up to 45 min (t85% = 45 min) were having a satisfied bioequivalence with the oral solution according to the C(max) and AUC. Although two different dissolution profiles of domestic amoxicillin capsules were found by flow-through cell methods, prediction results revealed that domestic capsules were probably bioequivalent to each other.

  20. The indentation of pressurized elastic shells: from polymeric capsules to yeast cells

    KAUST Repository

    Vella, D.

    2011-08-10

    Pressurized elastic capsules arise at scales ranging from the 10 m diameter pressure vessels used to store propane at oil refineries to the microscopic polymeric capsules that may be used in drug delivery. Nature also makes extensive use of pressurized elastic capsules: plant cells, bacteria and fungi have stiff walls, which are subject to an internal turgor pressure. Here, we present theoretical, numerical and experimental investigations of the indentation of a linearly elastic shell subject to a constant internal pressure. We show that, unlike unpressurized shells, the relationship between force and displacement demonstrates two linear regimes. We determine analytical expressions for the effective stiffness in each of these regimes in terms of the material properties of the shell and the pressure difference. As a consequence, a single indentation experiment over a range of displacements may be used as a simple assay to determine both the internal pressure and elastic properties of capsules. Our results are relevant for determining the internal pressure in bacterial, fungal or plant cells. As an illustration of this, we apply our results to recent measurements of the stiffness of baker\\'s yeast and infer from these experiments that the internal osmotic pressure of yeast cells may be regulated in response to changes in the osmotic pressure of the external medium.

  1. Inter-observer agreement for detection of small bowel Crohn's disease with capsule endoscopy

    DEFF Research Database (Denmark)

    Jensen, Michael Dam; Nathan, Torben; Kjeldsen, Jens

    2010-01-01

    OBJECTIVE: Compared to other modalities, capsule endoscopy (CE) has a high diagnostic yield for diagnosing small bowel Crohn's disease (CD). The aim of this study was to determine the inter-observer agreement for detection of small bowel CD with predefined diagnostic criteria. MATERIAL AND METHODS...

  2. Comparison of ibuprofen release from minitablets and capsules containing ibuprofen: β-cyclodextrin complex.

    Science.gov (United States)

    Salústio, P J; Cabral-Marques, H M; Costa, P C; Pinto, J F

    2011-05-01

    Mixtures containing ibuprofen (IB) complexed with β-cyclodextrin (βCD) obtained by two complexation methods [suspension/solution (with water removed by air stream, spray- and freeze-drying) and kneading technique] were processed into pharmaceutical dosage forms (minitablets and capsules). Powders (IB, βCD and IBβCD) were characterized for moisture content, densities (true and bulk), angle of repose and Carr's index, X-ray and NMR. From physical mixtures and IBβCD complexes without other excipients were prepared 2.5-mm-diameter minitablets and capsules. Minitablets were characterized for the energy of compaction, tensile strength, friability, density and IB release (at pH 1.0 and 7.2), whereby capsules were characterized for IB release. The results from the release of IB were analyzed using different parameters, namely, the similarity factor (f(2)), the dissolution efficiency (DE) and the amounts released at a certain time (30, 60 and 180 min) and compared statistically (α=0.05). The release of IB from the minitablets showed no dependency on the amount of water used in the formation of the complexes. Differences were due to the compaction force used or the presence of a shell for the capsules. The differences observed were mostly due to the characteristics of the particles (dependent on the method considered on the formation of the complexes) and neither to the dosage form nor to the complex of the IB.

  3. Study on a magnetic spiral-type wireless capsule endoscope controlled by rotational external permanent magnet

    Energy Technology Data Exchange (ETDEWEB)

    Ye, Bo, E-mail: yebo@hubu.edu.cn [School of Mechanical Science & Engineering, Huazhong University of Science & Technology, Wuhan 430074 (China); School of Computer Science and Information Engineering, HuBei University, Wuhan 430062 (China); Zhang, Wei [Department of Mechanical Engineering, Hubei University of Automotive Technology, Shiyan 442002 (China); Sun, Zhen-jun [School of Mechanical Science & Engineering, Huazhong University of Science & Technology, Wuhan 430074 (China); Guo, Lin [School of Computer Science and Information Engineering, HuBei University, Wuhan 430062 (China); Deng, Chao [School of Mechanical Science & Engineering, Huazhong University of Science & Technology, Wuhan 430074 (China); Chen, Ya-qi [Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030 (China); Zhang, Hong-hai [School of Mechanical Science & Engineering, Huazhong University of Science & Technology, Wuhan 430074 (China); Liu, Sheng [School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072 (China)

    2015-12-01

    In this paper, the authors propose rotating an external permanent magnet (EPM) to manipulate the synchronous rotation of a magnetic spiral-type wireless capsule endoscope (WCE), and the synchronous rotation of the WCE is converted to its translational motion in intestinal tract. In order to preliminarily verify the feasibility of this method, a handheld actuator (HA) controlled by micro controller unit, a magnetic spiral-type WCE and a bracket were fabricated, theoretical analysis and simulations about the control distance of this method were performed, and in ex-vivo tests were examined in porcine small intestine to verify the control distance and control performances of this method. It was demonstrated that this method showed good performances in controlling the translational motion of the magnetic spiral-type WCE, and this method has great potential to be used in clinical application. - Highlights: • A new magnetic control method for spiral-type wireless capsule endoscope is proposed. • Wireless capsule endoscope rotates synchronously with external permanent magnet. • The method controls the wireless capsule endoscope well in porcine small intestine. • Long control distance makes the method may be used in future medical application. • Experimental setup has great advantages: high cost performance and easy operation.

  4. Seeding of capsule instability growth by fill tubes and support rods for inertial confinement fusion implosions

    Science.gov (United States)

    Macphee, Andrew; Casey, Daniel; Clark, Daniel; Field, John; Haan, Steven; Hammel, Bruce; Kroll, Jeremy; Landen, Otto; Martinez, David; Milovich, Jose; Nikroo, Abbas; Rice, Neal; Robey, Harry; Smalyuk, Vladimir; Stadermann, Michael; Weber, Christopher; Lawrence Livermore National Laboratory Collaboration; Atomics Collaboration, General

    2016-10-01

    Features associated with the target support tent and deuterium-tritium fuel fill tube and support rods can seed hydrodynamic instabilities leading to degraded performance for inertial confinement fusion (ICF) experiments at the National Ignition Facility. We performed in-flight radiography of ICF capsules in the vicinity of the capsule support tent and fill tube surrogates to investigate instability growth associated with these features. For both plastic and high density carbon ablators, the shadow of the 10 μm diameter glass fill-tube cast by the x-ray spots on the hohlraum wall were observed to imprint radial instabilities around the fill tube/capsule interface. Similarly, instability growth was observed for the shadow cast by 12 μm diameter silicon carbide capsule support rods mounted orthogonal to the fill tube as a tent alternative for a plastic ablator. The orientation of the shadows is consistent with raytracing. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

  5. Meandered conformai antenna for ISM-band ingestible capsule communication systems.

    Science.gov (United States)

    Arefin, Md Shamsul; Redoute, Jean-Michel; Yuce, Mehmet Rasit

    2016-08-01

    The wireless capsule has been used to measure physiological parameters in the gastrointestinal tract where communication from in-body to external receiver is necessary using a miniaturized antenna with high gain and onmidirectional radiation pattern. This paper presents a meandered conformal antenna with center frequency of 433 MHz for a wireless link between an in-body capsule system and an ex-body receiver system. The antenna is wrapped around the wireless capsule, which provides extra space for other circuits and sensors inside the capsule as well as allows it having larger dimensions compared to inner antennas. This paper analyses return loss, radiation pattern, antenna gain, and propagation loss using pork as the gastrointestinal tissue simulating medium. From the radiation pattern and return loss results, the antenna shows an omni-directional radiation pattern and an ultrawide bandwidth of 124.4 MHz (371.6 to 496 MHz) for VSWR <; 2. Experimental results shows that the path loss is 17.24 dB for an in-body propagation distance of 140 mm.

  6. The ionic interaction of Klebsiella pneumoniae K2 capsule and core lipopolysaccharide.

    Science.gov (United States)

    Fresno, Sandra; Jiménez, Natalia; Izquierdo, Luis; Merino, Susana; Corsaro, Maria Michela; De Castro, Cristina; Parrilli, Michelangelo; Naldi, Teresa; Regué, Miguel; Tomás, Juan M

    2006-06-01

    The complete structures of LPS core types 1 and 2 from Klebsiella pneumoniae have been described by other authors. They are characterized by a lack of phosphoryl residues, but they contain galacturonic acid (GalA) residues, which contribute to the necessary negative charges. The presence of a capsule was determined in core-LPS non-polar mutants from strains 52145 (O1 : K2), DL1 (O1 : K1) and C3 (O8 : K66). O-antigen ligase (waaL) mutants produced a capsule. Core mutants containing the GalA residues were capsulated, while those lacking the residues were non capsulated. Since the proteins involved in the transfer of GalA (WabG) and glucosamine residues (WabH) are known, the chemical basis of the capsular-K2-cell-surface association was studied. Phenol/water extracts from K. pneumoniae 52145DeltawabH waaL and 52145DeltawaaL mutants, but not those from from K. pneumoniae 52145DeltawabG waaL mutant, contained both LPS and capsular polysaccharide, even after hydrophobic chromatography. The two polysaccharides were dissociated by gel-filtration chromatography, eluting with detergent and metal-ion chelators. From these results, it is concluded that the K2 capsular polysaccharide is associated by an ionic interaction to the LPS through the negative charge provided by the carboxyl groups of the GalA residues.

  7. Anti-inflammatory Effects of Xuezhikang Capsule (血脂康胶囊)

    Institute of Scientific and Technical Information of China (English)

    ZHAO Shui-ping

    2006-01-01

    @@ It has been proved thatXuezhikang Capsule ( XZK,血脂康胶囊), a Chinese red-yeast rice extract, contains multiple natural statins (8 monacolins) and other components, which could significantly reduce the total cholesterol (TC) and LDL-cholesterol concentrations in blood.

  8. Visualization of Capsule Reentry Vehicle Heat Shield Ablation Using Naphthalene PLIF

    Science.gov (United States)

    Combs, Christopher S.; Clemens, Noel T.; Danehy, Paul M.

    2014-01-01

    The Orion Multi-Purpose Crew Vehicle (MPCV) will use an ablative heat shield and improved understanding of the ablation process would be beneficial for design purposes. Given that ablation is a multi-physics process involving heat and mass transfer, codes aiming to predict heat shield ablation are in need of experimental data pertaining to the turbulent transport of ablation products for validation. At The University of Texas at Austin, a technique is being developed that uses planar laser-induced fluorescence (PLIF) of a low-temperature sublimating ablator (naphthalene) to visualize the transport of ablation products in a supersonic flow. Since ablation at reentry temperatures can be difficult to recreate in a laboratory setting it is desirable to create a limited physics problem and simulate the ablation process at relatively low temperature conditions using naphthalene. A scaled Orion MPCV model with a solid naphthalene heat shield has been tested in a Mach 5 wind tunnel at various angles of attack in the current work. PLIF imaging reveals the distribution of the ablation products as they are transported into the heat-shield boundary layer and over the capsule shoulders into the separated shear layer and backshell recirculation region. Visualizations of the capsule shear layer using both naphthalene PLIF and Schlieren imaging compared favorably. High concentrations of naphthalene in the capsule separated flow region, intermittent turbulent structures on the heat shield surface, and interesting details of the capsule shear layer structure were observed using the naphthalene PLIF technique. The capsule shear layer was also shown to generally appear to be more turbulent at lower angles of attack. Furthermore, the PLIF signal increased steadily over the course of a run indicating that during a wind tunnel run the model heated up and the rate of naphthalene ablation increased. The shear layer showed increasing signs of turbulence over the course of a wind tunnel run

  9. Staphylococcus aureus ClpC divergently regulates capsule via sae and codY in strain newman but activates capsule via codY in strain UAMS-1 and in strain Newman with repaired saeS.

    Science.gov (United States)

    Luong, Thanh T; Sau, Keya; Roux, Christelle; Sau, Subrata; Dunman, Paul M; Lee, Chia Y

    2011-02-01

    ClpC is an ATPase chaperone found in most Gram-positive low-GC bacteria. It has been recently reported that ClpC affected virulence gene expression in Staphylococcus aureus. Here we report that ClpC regulates transcription of the cap operon and accumulation of capsule, a major virulence factor for S. aureus. As virulence genes are regulated by a complex regulatory network in S. aureus, we have used capsule as a model to understand this regulation. By microarray analyses of strain Newman, we found that ClpC strongly activates transcription of the sae operon, whose products are known to negatively regulate capsule synthesis in this strain. Further studies indicated that ClpC repressed capsule production by activating the sae operon in strain Newman. Interestingly, the clpC gene cloned into a multiple-copy plasmid vector exhibited an activation phenotype, suggesting that ClpC overexpression has a net positive effect. In the absence of sae function, by either deletion or correction of a native mutation within saeS, we found that ClpC had a positive effect on capsule production. Indeed, in the UAMS-1 strain, which does not have the saeS mutation, ClpC functioned as an activator of capsule production. Our microarray analyses of strain Newman also revealed that CodY, a repressor of capsule production, was repressed by ClpC. Using genetic approaches, we showed that CodY functioned downstream of ClpC, leading to capsule activation both in Newman and in UAMS-1. Thus, ClpC functions in two opposite pathways in capsule regulation in strain Newman but functions as a positive activator in strain UAMS-1.

  10. Primary Posterior Chamber Intraocular Lens Implantation in Traumatic Cataract With Posterior Capsule Breaks

    Institute of Scientific and Technical Information of China (English)

    YupingZou; WenhuiYang

    1995-01-01

    Background:In patients with incomplete posterior capsule support,posterior chamber intraocular lenses(PC-IOLs)were implanted with both haptics transs-cleral fixation.This causes more damage to the eye and may result in more com-plications,In patients with small posterior breaks,non-fixation or single haptic fixation may be adequate.Methods:Thiry-two consecutive patients of traumatic cataract with posterior capsule breaks caused by penetrating eye trauma were retospected.Posterior chamber intraocular lenses were implanted in all these patients with three tech-niques,ie,without fixation,with single haptic fixation and with both haptics fixation .The selection of the technique was based on the position and size of the posterior capsule.The follow-up period was 21days to 28months(mean,15.2months).Results:Intra-operative problems included ciliary body bleeding(Two patents,6.25%)and enlargement of posterior capsule breaks(2patients,6.25).Postoperative visual acuity was0.5or better(Corrected)in28case(87.5%)and 0.1-0.4in four patients(12.5%),Postoperative complications included hyphema(6eyes,18.8%),transient intraocular pressure elevation(6eyes,18.8%),transient hypotention(7eyes,21.8%).Postoperative IOL position were good except one case of IOL tilt.No pupillary capture or endophthalmitis was found.Conclusions:Not all PC-IOLs have to be fixed by two haptics.In patients with small posterior capsule breaks,PC-IOLmay not be fixed or fixed by only one haptics.Eye Science1995;11:140-142.

  11. Out-pile test of the capsule with cone shape bottom structures

    Energy Technology Data Exchange (ETDEWEB)

    Choi, M. H.; Kang, Y. H.; Cho, M. S.; Choo, K. N.; Kim, B. G.; Son, J. M.; Park, S. J.; Shin, Y. T.; Oh, J. M

    2004-01-01

    The design modification of bottom guide structures for the instrumented capsule which is used for the irradiation test in the research reactor, HANARO is done because of the cutting trouble of the bottom guide arm's pin. The previous structure of the 3-pin arm shape is changed into one body of the cone shape. The specimens of the bottom end cap ring with three different sizes ({phi}68mm, {phi}70mm, {phi}72mm) are designed and manufactured. The out-pile test for the capsule with previous 3-pin arm and new three bottom structures of the cone shape is performed using the one-channel flow test facilities. In order to estimate the compatibility with HANARO, the structural stability and integrity of the capsule, the out-pile test such as a loading/unloading test, a pressure drop test, a thermal performance test, a displacement measurement due to a vibration and an endurance test etc. is conducted, and the outer diameter of the bottom end cap ring to meet the HANARO requirements is selected. From out-pile test results the capsule with cone shape bottom structures is evaluated as to have the structural stability and the benefit from the fluid's flow respect. Also the size satisfied various requirements among three kinds of bottom end cap rings is 70mm in diameter. It is expected that the new bottom structures of the cone shape with 70mm in diameter will be applicable to all material and special capsules which will be designed and manufactured for the purpose of irradiation tests in the future.

  12. Formulation and stability evaluation of extemporaneously prepared atenolol capsules from crushed atenolol tablets.

    Science.gov (United States)

    Zaid, Abdel Naser; Malkieh, Numan; Kharoaf, Maher; Abu Ghoush, Abeer; Al-Ramahi, Rowa'

    2012-01-01

    The purpose of this study was to formulate a 25-mg atenolol capsule starting from a commercial 100-mg atenolol tablet, given the fact that this strength is not available in Palestine and also because 50-mg atenolol tablets failed the splitting uniformity test of the European Pharmacopoeia, and to evaluate the chemical stability and dissolution behavior of the obtained capsules so as to ensure a high-quality product. A high-performance liquid chromatographic system was used for the analysis and quantification of atenolol in the samples studied. Samples of atenoIol for analysis were prepared as reported by the United States Pharmacopeia monograph. Disintegration and dissolution tests were performed according to the United States Pharmacopeia. The high-performance liquid chromatography assay indicated that the 25-mg atenolol capsules were stable for four months when stored at ambient temperature conditions. The disintegration time for all atenolol capsules was within the United States Pharmacopeia limits of 15 minutes. Atenolol release profile showed that approximately 90% of atenolol dissolved after 10 minutes. This study is important for patients who need to take one half of a 50-mg tablet, but for whom the splitting process doesn't give equal halves, and also for modifying the dose for patients with renal or hepatic problems. Therefore, it is possible for the community pharmacist to crush atenolol 100-mg tablets and refill them in new capsules with each containing a precise amount of atenolol, calculated according to body surface area and kidney and liver functions without affecting the chemical stability of the active ingredient nor its dissolution profile and also have a cost effective dosage form.

  13. Design of a video capsule endoscopy system with low-power ASIC for monitoring gastrointestinal tract.

    Science.gov (United States)

    Liu, Gang; Yan, Guozheng; Zhu, Bingquan; Lu, Li

    2016-11-01

    In recent years, wireless capsule endoscopy (WCE) has been a state-of-the-art tool to examine disorders of the human gastrointestinal tract painlessly. However, system miniaturization, enhancement of the image-data transfer rate and power consumption reduction for the capsule are still key challenges. In this paper, a video capsule endoscopy system with a low-power controlling and processing application-specific integrated circuit (ASIC) is designed and fabricated. In the design, these challenges are resolved by employing a microimage sensor, a novel radio frequency transmitter with an on-off keying modulation rate of 20 Mbps, and an ASIC structure that includes a clock management module, a power-efficient image compression module and a power management unit. An ASIC-based prototype capsule, which measures Φ11 mm × 25 mm, has been developed here. Test results show that the designed ASIC consumes much less power than most of the other WCE systems and that its total power consumption per frame is the least. The image compression module can realize high near-lossless compression rate (3.69) and high image quality (46.2 dB). The proposed system supports multi-spectral imaging, including white light imaging and autofluorescence imaging, at a maximum frame rate of 24 fps and with a resolution of 400 × 400. Tests and in vivo trials in pigs have proved the feasibility of the entire system, but further improvements in capsule control and compression performance inside the ASIC are needed in the future.

  14. An Investigation Into Bayesian Networks for Modeling National Ignition Facility Capsule Implosions

    Energy Technology Data Exchange (ETDEWEB)

    Mitrani, J

    2008-08-18

    Bayesian networks (BN) are an excellent tool for modeling uncertainties in systems with several interdependent variables. A BN is a directed acyclic graph, and consists of a structure, or the set of directional links between variables that depend on other variables, and conditional probabilities (CP) for each variable. In this project, we apply BN's to understand uncertainties in NIF ignition experiments. One can represent various physical properties of National Ignition Facility (NIF) capsule implosions as variables in a BN. A dataset containing simulations of NIF capsule implosions was provided. The dataset was generated from a radiation hydrodynamics code, and it contained 120 simulations of 16 variables. Relevant knowledge about the physics of NIF capsule implosions and greedy search algorithms were used to search for hypothetical structures for a BN. Our preliminary results found 6 links between variables in the dataset. However, we thought there should have been more links between the dataset variables based on the physics of NIF capsule implosions. Important reasons for the paucity of links are the relatively small size of the dataset, and the sampling of the values for dataset variables. Another factor that might have caused the paucity of links is the fact that in the dataset, 20% of the simulations represented successful fusion, and 80% didn't, (simulations of unsuccessful fusion are useful for measuring certain diagnostics) which skewed the distributions of several variables, and possibly reduced the number of links. Nevertheless, by illustrating the interdependencies and conditional probabilities of several parameters and diagnostics, an accurate and complete BN built from an appropriate simulation set would provide uncertainty quantification for NIF capsule implosions.

  15. Tethered capsule OCT endomicroscopy: from bench to bedside at the primary care office (Conference Presentation)

    Science.gov (United States)

    Gora, Michalina J.; Simmons, Leigh H.; Tiernan, Aubrey R.; Grant, Catriona N.; Soomro, Amna R.; Walker Corkery, Elizabeth S.; Rosenberg, Mireille; Metlay, Joshua P.; Tearney, Guillermo J.

    2016-03-01

    We have developed a swallowable tethered capsule OCT endomicroscopy (TCE) device that acquires microscopic images of the entire esophagus in unsedated subjects in a quick and comfortable procedure. To test its capabilities of TCE to become a population-based screening device, we conducted a clinical feasibility study in the primary care office. The swept-source OCT imaging system (1310nm central wavelength, 40kHz A-line rate, 10um axial resolution) together with the tethered capsule catheter (11x25mm capsule attached to a flexible tether) were transferred to the PCP office where unsedated patients scheduled for non-urgent PCP visits swallowed the capsule and microscopic OCT images of the entire esophagus were collected. After the whole length of the esophagus was imaged, the catheter was disinfected for reuse. Twenty subjects were enrolled in the study, including nine female and eleven male. All TCE procedures were performed by a nurse and lasted in average 5:42 ± 1:54 min. High-resolution images of the esophagus were obtained in all seventeen subjects that swallowed the capsule. Our clinical experience in this cohort, subject feedback, image quality, and technological adaptations for efficient utilization in this setting will be presented. The ease and simplicity of the procedure combined with high quality of the images demonstrate the potential for this technology to become a population-based screening device. Technology limitations and future development guided by findings from this initial experience will be discussed with the goal of effectively translating TCE to the outpatient primary care setting.

  16. Synchronous multicentric small hepatocellular carcinomas: Defining the capsule on high-frequency intraoperative ultrasonography with pathologic correction

    Energy Technology Data Exchange (ETDEWEB)

    Ahn, Jae Hong; Eom, Dae Woon; Ryu, Dae Shick; Park, Man Soo; Jung, Seung Mun; Choi, Kun Moo; Cheon, Gab Jin; Choi, Soo Jung; Jang, Hyuk Jai [Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung (Korea, Republic of)

    2016-08-15

    The aim of this study was to define the capsules of synchronous multicentric small hepatocellular carcinomas (HCCs) with use of high-frequency intraoperative ultrasonography (IOUS). Among the 131 consecutive patients undergoing hepatic resection and high-frequency IOUS for HCC, 16 synchronous multicentric small HCCs in 13 patients were histologically diagnosed in the resected specimens. High-frequency IOUS and pathologic findings of these lesions were compared, with particular focus on the presence and appearance of the capsule in or around each lesion. Synchronous multicentric small HCCs were pathologically classified into distinctly nodular (n=12) or vaguely nodular (n=4) types. All 12 distinctly nodular HCCs including six subcentimeter lesions showed detectable capsules on high-frequency IOUS and pathology. The capsules appeared as a hypoechoic rim containing hyperechoic foci (n=6), hypoechoic rim (n=5), or hyperechoic rim (n=1) with varying degrees of coverage around each lesion. Histologically, the capsules were composed of a combination of one to four layers consisting of a fibrous capsule, peritumoral fibrosis, prominent small vessels, and entrapped hepatic parenchyma. Synchronous multicentric small HCCs with distinctly nodular type, even at subcentimeter size, can show capsules with varying coverage and diverse echogenicity on high-frequency IOUS.

  17. Innervation and functional characteristics of connective tissues, especially elastic fibers, in human fetal thoracic intervertebral articular capsule and its surroundings.

    Science.gov (United States)

    Shiraishi, Yosuke; Kobayashi, Miya; Yasui, Masaya; Ozaki, Noriyuki; Sugiura, Yasuo

    2003-05-01

    The articular capsules between the thoracic vertebrae, which have physiologically different functions from those of other levels of the vertebrae, have yet to be subjected to neuro-anatomical and fine structural analysis. In the present study, we analyzed serial frozen sections of decalcified thoracic vertebrae in human fetuses, and identified the articular capsule tissue with its unique distribution of elastic fibers. The fine structure of the elastic fibers was studied by transmission electron microscopy. In the early-stage fetus, the fibrous membrane forming the lateral intervertebral articular capsule contained abundant thin elastic fibers consisting of microfibrils. In the late-stage fetus, the lateral capsule of fibrous membrane was occupied by thick elastic fibers. A medial articular capsule, namely the ligamenta flava, contained numerous thick elastic fibers in both early and late-stage fetuses. The distributional differences in nerve fibers between early and late-stage fetuses were determined by immunostaining, using antibodies raised against protein gene product 9.5 (PGP 9.5; ubiquitin carboxyl-terminal hydrolase). Innervation by PGP 9.5 immunoreactive fibers was limited to the areas of the articular capsules near the blood vessels, which may indicate their functional relation with blood flow. No PGP 9.5 immunoreactive fibers were found in the ligamenta flava of the late-stage fetus. Innervation might be directly involved in the development of the intervertebral articular capsules in normal human fetuses.

  18. Effect of Traditional Chinese Medicine Antiviral Capsules On Animal Model Genital Herpes and HSV-2 in Cell Culture

    Institute of Scientific and Technical Information of China (English)

    范瑞强; 李红毅; 谢长才; 禤国维; 朱宇同

    2001-01-01

    Objective: To study the effect of traditional Chinese medicine antiviral capsules in the treatment of genital herpes.Methods: Using female guinea pig genital herpes as the animal model, this study used oral administration of two formulations of antiviral capsules (AC) and observed the effect on vaginal HSV-2 titers and vulvar symptoms. Cell cultures were also used to examine the direct inactivation of HSV-2 by the antiviral capsules and the suppression of HSV-2 via three drug administration methods.Results: There was no significant difference of mean vaginal virus titers between the antiviral capsule groups and that of the positive acyclovir (ACV) control (P>0.05). Mean vulvar symptom scores of the two antiviral capsule groups were also significantly lower than that of the saline negative control group on days 2, 3, 5, 7 and 8 (P<0.05) and similar to that of the ACV control (P>0.05). Cell culture showed the minimum inhibitory concentrations of antiviral capsules No. 1 and No. 2 were 0.390625 mg/ml and 1,5625 mg/ml, respectively.Conclusion: The traditional Chinese medicine antiviral capsules had suppressive effects on HSV-2 in both animal model GH and in vitro cell culture.

  19. Design, Fabrication and Test Report on a Verification Capsule (05M-06K) for the Control of a Neutron Irradiation Fluence of Specimens in HANARO

    Energy Technology Data Exchange (ETDEWEB)

    Choo, K. N.; Kim, B. G.; Kang, Y. H.; Cho, M. S.; Son, J. M.; Shin, Y. T.; Park, S. J.; Choi, M. H.; Lee, D. S.

    2007-02-15

    As a part of a project for a capsule development and utilization for an irradiation test, a verification capsule (05M-06K) was designed, fabricated and tested for the development of new instrumented capsule technology for a more precise control of the irradiation fluence of a specimen, irrespective of the reactor operation condition. The basic structure of the 05M-06K capsule was based on the 04M-22K mock-up capsule which was successfully designed and out-pile tested to confirm the various key technologies necessary for the fluence control of a specimen. 21 square and round shaped specimens made of STS 304 were inserted into the capsule. The capsule was constructed in 5 stages with specimens and an independent electric heater at each stage. Each of the five specimens which were accommodated in the 1st stage (top) of the capsule can be taken out of the HANARO core during a normal reactor operation. The specimen is extracted by a specimen extraction mechanism using a steel wire. During the out-pile test, the temperatures of the specimens were measured by 12 thermocouples installed in the capsule. The capsule was successfully out-pile tested in a single channel test loop. The obtained results will be used for a safety evaluation of the new irradiation capsule for controlling the irradiation fluence of specimens in HANARO.

  20. Olfaction Presentation System Using Odor Scanner and Odor-Emitting Apparatus Coupled with Chemical Capsules of Alginic Acid Polymer

    Science.gov (United States)

    Sakairi, Minoru; Nishimura, Ayako; Suzuki, Daisuke

    For the purpose of the application of odor to information technology, we have developed an odor-emitting apparatus coupled with chemical capsules made of alginic acid polymer. This apparatus consists of a chemical capsule cartridge including chemical capsules of odor ingredients, valves to control odor emission, and a temperature control unit. Different odors can be easily emitted by using the apparatus. We have developed an integrated system of vision, audio and olfactory information in which odor strength can be controlled coinciding with on-screen moving images based on analytical results from the odor scanner.

  1. Synthesis, characterization, stability evaluation and release kinetics of fiber-encapsulated carotene nano-capsules

    Directory of Open Access Journals (Sweden)

    Sen Gupta, S.

    2015-12-01

    Full Text Available In the present work, carotenoids were isolated (1.2% from crude palm oil and encapsulated with isabgol fiber (Psyllium husk. The efficiency of encapsulation was 82.23±1.42%. The morphology of the capsules showed rough surface texture with minimal pores. The amorphous natures of the nano-capsules was obvious from X-ray diffraction patterns. DSC studies showed high thermal stability of the nano-capsules between 20–120 °C. In vitro release studies revealed that controlled release from the nano-capsules could be achieved using isabgol fiber as encapsulant. However it was observed that the nano-capsules followed a non-Fickian diffusion pattern. Good DPPH-radical scavenging and metal-chelation activities were observed for encapsulated carotenoids. Shelf-life studies showed that the nano-capsules gradually degraded at 97% relative humidity, as the moisture-induced rancidity was evidently not extensive.En el presente trabajo los carotenos fueron aislados (1,2% a partir de aceite de palma crudo y encapsulados con fibra de isabgol (cáscara de psyllium. La eficiencia de encapsulación fue 82,23±1,42 %. La morfología de las cápsulas mostró una textura áspera de la superficie con mínimos poros. La naturaleza amorfa de las nanocápsulas fue evidenciada a partir de patrones de difracción de rayos X. Los estudios de DSC mostraron una alta estabilidad térmica de las nanocápsulas entre 20–120 °C. En los estudios de liberación in vitro se vió que la liberación controlada de las nanocápsulas se podría lograr mediante fibra isabgol como encapsulante. Sin embargo se observó que las nanocápsulas siguieron un patrón de difusión no- Fickian. Se observaron buenas actividades DPPH captadoras de radicales y actividades de quelación de metal para carotenoides encapsulados. Los estudios sobre la vida útil mostraron que las nanocápsulas se degradan gradualmente con una humedad relativa del 97%, y aunque la humedad indujo el enranciamiento, este

  2. Neuroanatomical distribution of mechanoreceptors in the human cadaveric shoulder capsule and labrum.

    Science.gov (United States)

    Witherspoon, Jessica W; Smirnova, Irina V; McIff, Terence E

    2014-09-01

    The distribution, location, and spatial arrangement of mechanoreceptors are important for neural signal conciseness and accuracy in proprioceptive information required to maintain functional joint stability. The glenohumeral joint capsule and labrum are mechanoreceptor-containing tissues for which the distribution of mechanoreceptors has not been determined despite the importance of these tissues in stabilizing the shoulder. More recently, it has been shown that damage to articular mechanoreceptors can result in proprioceptive deficits that may lead to recurrent instability. Awareness of mechanoreceptor distribution in the glenohumeral joint capsule and labrum may allow preservation of the mechanoreceptors during surgical treatment for shoulder instability, and in turn retain the joint's proprioceptive integrity. For this reason, we sought to develop a neuroanatomical map of the mechanoreceptors within the capsule and labrum. We postulated that the mechanoreceptors in these tissues are distributed in a unique pattern, with mechanoreceptor-scarce regions that may be more appropriate for surgical dissection. We determined the neuroanatomical distribution of mechanoreceptors and their associated fascicles in the capsule and labrum from eight human cadaver shoulder pairs using our improved gold chloride staining technique and light microscopy. A distribution pattern was consistently observed in the capsule and labrum from which we derived a neuroanatomical map. Both tissues demonstrated mechanoreceptor-dense and -scarce regions that may be considered during surgical treatment for instability. Capsular fascicles were located in the subsynovial layer, whereas labral fascicles were concentrated in the peri-core zone. The capsular fascicles presented as a lattice network and with a plexiform appearance. Fascicles within the labrum resembled a cable structure with the fascicles running in parallel. Our findings contribute to the neuroanatomical knowledge of the two

  3. Effect of incorporation of nutraceutical capsule waste of safflower oil in the mechanical characteristics of corn starch films

    Directory of Open Access Journals (Sweden)

    Camila de CAMPO

    2016-01-01

    Full Text Available Abstract Biodegradable films blends made of safflower oil nutraceutical capsules waste corn starch (20:4, 30:4, 40:4 and 50:4 were prepared. The objective of this study was to evaluate the influence of addition of different concentrations of safflower oil nutraceutical capsule waste in the mechanical properties (tensile strength, elongation at break, Young’s modulus and thickness of corn starch films. A decrease in tensile strength and Young’s modulus and an increase in elongation at break were observed with the increase in the content of the nutraceutical capsule waste. The results showed that the blends of safflower oil capsules waste-corn starch films demonstrated promising characteristics to form biodegradable films with different mechanical characteristics.

  4. Pair-collision between heterogeneous capsules in simple shear: Effect of membrane stiffness and membrane constitutive laws

    Science.gov (United States)

    Singh, Rajesh; Sarkar, Kausik

    2012-11-01

    Deformability of red blood cells affects hydrodynamic properties of blood and thereby physiological functions in many cardiovascular diseases, e.g. in sickle cell anemia and malaria, the cell membrane becomes stiff affecting their circulation through microvessels. Here, we numerically simulate the hydrodynamic interaction between a pair of cell-like capsules in a free shear flow, using a front-tracking method. The membrane is modeled using various constitutive equations. By varying the stiffness of one capsule (C2) and keeping all other parameters constant, we find a significant effect on the deformation and trajectory of the other (C1) . Increasing the stiffness of C2 surprisingly increases the peak deformation of C1 while decreasing the cross-stream shift in its trajectory However, the relative trajectory between capsules remains the same. Effects of constitutive laws and difference in behaviors between capsules and drops are investigated explaining underlying physics. partial support from NSF.

  5. Capsule of Streptococcus pyogenes is essential for delayed death of mice in a model of streptococcal toxic shock syndrome.

    Science.gov (United States)

    Iida, Ken-ichiro; Seki, Masanori; Saito, Mitsumasa; Kawamura, Yoshiaki; Kajiwara, Hideko; Yoshida, Shin-ichi

    2006-01-01

    We have previously reported a mouse model of severe group A streptococcal infection (Microbiol. Immunol. 45: 777-786, 2001). When we injected Streptococcus pyogenes strains intramuscularly, the mice suffered from acute phase of infection for a few days but recovered from the illness and gained body weight. These mice, however, began to die after 3 weeks of infection, which we called 'delayed death.' Bacterial strains isolated from organs of the dead mice showed thick capsules. We, therefore, constructed a hyaluronic acid capsule gene, hasA, knockout mutant by homologous recombination and the effect of capsule on the death was observed. hasA knockout strain did not cause delayed death, though it caused acute death at high doses of infection. According to this result, the capsule is a critical pathogenic factor for causing the delayed death in our mouse model.

  6. Subsonic Wake Characterization of the Orion Capsule Using PIV in the Ames UPWT 11-foot Wind Tunnel (Invited)

    Science.gov (United States)

    Heineck, James T.; Ross, James C.; Yamauchi, Gloria K.

    2015-01-01

    The subsonic regime of Crew Capsule reentry has a very turbulent waker through which the Drogue Chutes must deploy. This presentation describes the particle image velocimetry measurement campaign used to help retire the risk.

  7. [Post-marketing clinical study of traditional Chinese medicine--lessons learned from comprehensive evaluation of Fufang Zaoren capsule].

    Science.gov (United States)

    Qing, Shan; Gao, Lin; Zhang, Li; Jia, Jian-Ping; Liu, Xin-Min; Ji, Shao-Liang; Yang, Xiao-Hui

    2013-11-01

    By comprehensive review and analysis of post-marketing clinical research on the efficacy and safety,we concluded that Fufang Zaoren capsule has certain therapeutic effects for insomnia, although current clinical research design needs improving. The post-marketing clinical studies also showed that it causes several adverse reactions at the recommended doses, such as chills, fever, dizziness, nausea, shortness of breath, chest tightness and palpitations, whereas high doses of Fufang Zaoren capsule can cause delayed extrapyramidal symptoms. Health Canada government website also prompted the L-tetrahydropalmatine in Fufang Zaoren capsule caused liver damage in pregnant women. The authors summarized the risk points, factors and risk control in the clinical use of Fufang Zaoren capsule and also present their perspective on the research status, existing problems and corresponding countermeasures in the post-marketing clinical re-evaluation of traditional Chinese medicine.

  8. [Analysis methodology of multi element in four herbs of guizhi fuling capsules].

    Science.gov (United States)

    Wang, Jin-ling; Li, Jia-chun; Hu, Jun-hua; Huang, Wen-zhe; Wang, Zhen-zhong; Xiao, Wei

    2014-11-01

    This paper was focused on establishing a ICP-MS method with microwave digestion for simultaneous determination of lead, copper, arsenic, cadmium, mercury, magnesium, manganese, nickel, thallium in cassia tuckahoe capsule and its five raw herbal materials. Internal standard method was adopted to reduce matrix effect and other interference effects. The method established was shown to be simple with high sensitivity, strong specificity and good reproducibility. Linear relationship is good as R2 ≥ 0.999 3 while the average recovery was among 75.84% - 118.9%. The detection limit was 0.016 - 4.593 μg x L(-1). Data in this paper provided the basis for control of deleterious element in Guizhi Fuling capsules, and further more it was with referencing values for control of deleterious element in other crude drug.

  9. Obscure gastrointestinal bleeding: difficulties in comparing CT enterography and video capsule endoscopy

    Energy Technology Data Exchange (ETDEWEB)

    Soyer, Philippe [Hopital Lariboisiere-APHP 2, Department of Imaging and Nuclear Medicine, Paris (France); UMR INSERM 965-Paris 7 ' ' Angiogenese et recherche translationnelle' ' , Paris (France); Universite Diderot-Paris 7, Paris (France)

    2012-06-15

    A paper reports the results of a retrospective study that was designed to evaluate the potential role of video capsule endoscopy (VCE) in elucidating the cause of bleeding in patients with obscure gastrointestinal bleeding (OGIB) for whom CT enterography was negative. The authors highlight the limitations of dual-phase CT enterography for the detection of flat lesions of the small bowel such as ulcers, angiodysplasias or arteriovenous malformations, and confirm the superiority of VCE for the detection of this category of lesions. This commentary discusses some of the issues raised. Key Points circle Video capsule endoscopy surpasses CT enterography in detecting flat small bowel lesions. circle Retrospective VCE and CT enterography findings in obscure bleeding need further evaluation. circle A fair and unbiased comparison of the two investigations is still needed. (orig.)

  10. Hierarchically functionalized magnetic core/multishell particles and their postsynthetic conversion to polymer capsules.

    Science.gov (United States)

    Schmitt, Sophia; Silvestre, Martin; Tsotsalas, Manuel; Winkler, Anna-Lena; Shahnas, Artak; Grosjean, Sylvain; Laye, Fabrice; Gliemann, Hartmut; Lahann, Joerg; Bräse, Stefan; Franzreb, Matthias; Wöll, Christof

    2015-01-01

    The controlled synthesis of hierarchically functionalized core/multishell particles is highly desirable for applications in medicine, catalysis, and separation. Here, we describe the synthesis of hierarchically structured metal-organic framework multishells around magnetic core particles (magMOFs) via layer-by-layer (LbL) synthesis. The LbL deposition enables the design of multishell systems, where each MOF shell can be modified to install different functions. Here, we used this approach to create controlled release capsules, in which the inner shell serves as a reservoir and the outer shell serves as a membrane after postsynthetic conversion of the MOF structure to a polymer network. These capsules enable the controlled release of loaded dye molecules, depending on the surrounding media.

  11. Targeted Delivery by Smart Capsules for Controlling Two-phase Flow in Porous Media

    Science.gov (United States)

    Fan, J.; Weitz, D.

    2015-12-01

    Understanding and controlling two-phase flow in porous media are of particular importance to the relevant industry applications, such as enhanced oil recovery, CO2 sequestration, and groundwater remediation. We develop a variety of smart microcapsules that can deliver and release specific substances to the target location in the porous medium, and therefore change the fluid property or medium geometry at certain locations. In this talk, I will present two types of smart capsules for (a) delivering surfactant to the vicinity of oil-water interface and (b) delivering microgels to the high permeability region and therefore blocking the pore space there, respectively. We also show that flooding these two capsules into porous media effectively reduces the trapped oil and improves the homogeneity of the medium, respectively. Besides of its industrial applications, this technique also opens a new window to study the mechanism of two-phase flow in porous media.

  12. Localization of a Robotic Capsule for GI Motility Inspection with a Portable Ultrasonic System

    Institute of Scientific and Technical Information of China (English)

    姜萍萍; 颜国正

    2004-01-01

    The micro-systems used for in vivo physical inspection have many advantages over traditional methods. In order to aid diagnosis of gastrointestinal (GI) motility disorders, a capsule is developed for GI pressure and pH inspection. Localization of the capsule in GI tract with time is a necessary condition for subsequent data analysis and medical diagnosis. It is also a common problem facing all in vivo mobile micro-systems. An approach of segment localization by utilizing some key points along GI tract is proposed. A portable ultrasonic detecting device was designed for this purpose. Experiments under conditions similar to GI tract were carried out and the results proved the effectiveness and reliability of this method and the device.

  13. Beneficial effects of Bifidobacteria in a gastroresistant seamless capsule on hyperhomocysteinemia in hemodialysis patients.

    Science.gov (United States)

    Taki, Kentaro; Takayama, Fumio; Niwa, Toshimitsu

    2005-01-01

    Intestinal microflora is deranged in hemodialysis (HD) patients as an increase in aerobic bacteria such as Escherichia coli and a decrease in anaerobic bacteria such as Bifidobacterium . Bifidobacteria ferment carbohydrates to produce acetic acid and lactic acid, which inhibit the intestinal putrefaction. Thus, intake of Bifidobacteria effectively restores the disturbed microflora to normal. However, Bifidobacteria in most medical products and healthy foods cannot usually survive because of exposure to gastric juices before it reaches the intestines. A gastroresistant seamless capsule prevents Bifidobacteria from inactivation by acidic gastric juice and allows it to be active in the intestines. We showed that the oral administration of Bifidobacterium longum in a gastroresistant seamless capsule to HD patients is effective in decreasing the pre-HD serum levels of homocysteine, indoxyl sulfate, and triglyceride. The reduction in the serum level of homocysteine is mainly attributable to the supply of folate produced by Bifidobacterium longum in the human intestines.

  14. Characteristics of spatial magnetic torque of an intestine capsule micro robot with a variable diameter

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    A drive and control method is put forward for a variable diameter capsule micro robot to screw forward in intestine using magnetic coupling between an inner actuator inside the robot and the rotational magnetic field generated by a rotating outer actuator. The structures of the outer and inner actuators are magnet cylinders with multiple magnetic poles in tegular shape alternating with dissimilar radial magnetization. An universal mathematical model of magnetic torque at eccentric state is established based on the equivalent magnetic charge method, and the characteristics of magnetic torque with respect to structural parameters of actuators are theoretically studied. Experiments show that the driving method features advantages such as powerful magnetic torque, high safety, reliability, etc. The driving ability of the variable diameter capsule micro robot is greatly improved by its automatic radial clearance compensation. The magnetic drive system has a promising prospect of medical applications in intestine.

  15. Assessment of solvent capsule-based healing for woven E-glass fibre-reinforced polymers

    Science.gov (United States)

    Manfredi, Erica; Cohades, Amaël; Richard, Inès; Michaud, Véronique

    2015-01-01

    Vacuum Assisted Resin Infusion Molding (VARIM) with low vacuum pressure difference was used to manufacture woven glass fibre-reinforced epoxy resin plates, with a fibre volume fraction of approx. 50 vol% and containing ethyl phenylacetate (EPA)-filled capsules for self-healing purposes. Capsules were introduced by functionalising the fabrics through manual dispersion. We investigated the capability of autonomously healing delaminations induced by static loading in Mode I and II. Healing did not take place for composite samples; this was attributed to the presence of bare fibres on the crack plane and to the reduction of EPA diffusion into the matrix in the presence of fibres both of which hinder the swelling mechanism responsible for healing the cracks.

  16. A Real-Time Localization System for an Endoscopic Capsule Using Magnetic Sensors

    Directory of Open Access Journals (Sweden)

    Duc Minh Pham

    2014-11-01

    Full Text Available Magnetic sensing technology offers an attractive alternative for in vivo tracking with much better performance than RF and ultrasound technologies. In this paper, an efficient in vivo magnetic tracking system is presented. The proposed system is intended to localize an endoscopic capsule which delivers biomarkers around specific locations of the gastrointestinal (GI tract. For efficiently localizing a magnetic marker inside the capsule, a mathematical model has been developed for the magnetic field around a cylindrical magnet and used with a localization algorithm that provides minimum error and fast computation. The proposed tracking system has much reduced complexity compared to the ones reported in the literature to date. Laboratory tests and in vivo animal trials have demonstrated the suitability of the proposed system for tracking a magnetic marker with expected accuracy.

  17. Vitamin A capsule supplementation in Malawi villages: missed opportunities and possible interventions.

    Science.gov (United States)

    Berger, R A; Courtright, P; Barrows, J

    1995-01-01

    A population-based survey was used to assess childhood and maternal vitamin A capsule coverage in Malawi and to investigate missed opportunities for capsule distribution. Overall, 9.3% of children had received vitamin A supplementation in the previous 6 months. Missed opportunities for receiving vitamin A were high in younger children. Fifty-five percent of mothers were covered in 8 villages served by volunteers and 23% in the 58 villages without volunteers. Existing strategies need to be redesigned and new strategies defined. For instance, mothers could receive supplementation during infant BCG vaccination, and children could receive initial supplementation during measles vaccination. Village health volunteers could be used to target children over 2 years of age. PMID:7733436

  18. Probing the Physics of Burning DT Capsules Using Gamma-ray Diagnostics

    Energy Technology Data Exchange (ETDEWEB)

    Hayes-Sterbenz, Anna Catherine [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Hale, Gerald M. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Jungman, Gerard [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Paris, Mark W. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2015-02-01

    The Gamma Reaction History (GRH) diagnostic developed and lead by the Los Alamos National Laboratory GRH Team is used to determine the bang time and burn width of imploded inertial confinement fusion capsules at the National Ignition Facility. The GRH team is conceptualizing and designing a new Gamma-­to-Electron Magnetic Spectrometer (GEMS), that would be capable of an energy resolution ΔE/E~3-­5%. In this whitepaper we examine the physics that could be explored by the combination of these two gamma-ray diagnostics, with an emphasis on the sensitivity needed for measurements. The main areas that we consider are hydrodynamical mixing, ablator areal density and density profile, and temporal variations of the density of the cold fuel and the ablator during the DT burn of the capsule.

  19. Optical transmission and laser ablation of pathologically changed eye lens capsule

    Energy Technology Data Exchange (ETDEWEB)

    Gamidov, A A; Bolshunov, A V [Research Institute of Eye Diseases, Russian Academy of Medical Sciences, Moscow (Russian Federation); Yuzhakov, A V; Shcherbakov, E M; Baum, O I; Sobol, E N [Institute on Laser and Information Technologies, Russian Academy of Sciences, Shatura, Moscow Region (Russian Federation)

    2015-02-28

    Optical transmission and ablation mechanisms in the secondary cataract films under the impact of 1.06-mm laser radiation are studied. The comparison of incident and transmitted (paraxial) radiation power at different values of the power density is carried out for two types of the eye lens capsule tissue (hard and soft) possessing different optical and mechanical properties. It is found that the effective attenuation coefficient for soft films is almost five times as large as that for the hard ones. The obtained measurement data on the transparency variation in the process of laser action allow the temperature evaluation and the determination of dominant mechanism of laser ablation, as well as the development of recommendations, providing the prevention or reduction of possible side effects. The obtained results can be used to optimise the regimes of laser impact in the process of the opacified lens capsule removal.

  20. High efficiency nanocomposite sorbents for CO2 capture based on amine-functionalized mesoporous capsules

    KAUST Repository

    Qi, Genggeng

    2011-01-01

    A novel high efficiency nanocomposite sorbent for CO2 capture has been developed based on oligomeric amine (polyethylenimine, PEI, and tetraethylenepentamine, TEPA) functionalized mesoporous silica capsules. The newly synthesized sorbents exhibit extraordinary capture capacity up to 7.9 mmol g-1 under simulated flue gas conditions (pre-humidified 10% CO 2). The CO2 capture kinetics were found to be fast and reached 90% of the total capacities within the first few minutes. The effects of the mesoporous capsule features such as particle size and shell thickness on CO2 capture capacity were investigated. Larger particle size, higher interior void volume and thinner mesoporous shell thickness all improved the CO2 capacity of the sorbents. PEI impregnated sorbents showed good reversibility and stability during cyclic adsorption-regeneration tests (50 cycles). © 2011 The Royal Society of Chemistry.

  1. Reaction-in-Flight Neutrons as a Signature for Shell Mixing in NIF capsules

    CERN Document Server

    Hayes, A C; Grim, G P; Jungman, Gerard; Wilhelmy, J B

    2009-01-01

    We present analytic calculations and results from computational simulations showing that reaction-in-flight (RIF) neutrons act as a robust indicator for mixing of the ablator shell material into the fuel in DT capsules designed for the National Ignition Facility. The sensitivity of RIF neutrons to hydrodynamical mixing arises through the dependence of RIF production on charged-particle stopping lengths in the mixture of DT fuel and ablator material. Since the stopping power in the plasma is a sensitive function of the electron temperature and density, it is also sensitive to mix. RIF production scales approximately inversely with the degree of mixing taking place, and the ratio of RIF to downscattered neutrons provides a measure of the mix fraction and/or the mixing length. For sufficiently high-yield capsules, where spatially resolved RIF images may be possible, neutron imaging could be used to map RIF images into detailed mix images.

  2. Modelling the effect of 3He in direct drive capsule implosions

    Science.gov (United States)

    Garbett, W. J.; Horsfield, C. J.; Herrmann, H. W.; Langenbrunner, J. R.; Cooley, J. H.; Wilson, D. C.; Evans, S. C.; Sedillo, T. J.; Rubery, M. S.; Drew, D.; Mack, J. M.; Young, C. S.; Kyrala, G. A.; Frenje, J.; Glebov, V. Yu

    2010-08-01

    D3He fuels are often used in ICF implosion experiments, either as a surrogate for DT to restrict the output neutron yield, or to produce protons for use in diagnosis of core conditions. Recent experiments have suggested that capsules filled with D3He do not behave as expected, but that both proton and neutron yields are anomalously degraded relative to the pure D2 case. We have performed direct drive implosion experiments using the Omega laser to examine the effect of 3He on DT-filled glass capsules. The use of DT fuel allows reaction history measurements to be obtained using the Gas Cherenkov diagnostic (GCD). It was hoped that the detailed information provided by GCD measurements would complement existing measurements to constrain modelling. We present recent modelling and analysis of the experiments using radiation-hydrocode simulations, and explore some of the hypotheses proposed to explain the results.

  3. Theoretical study of the fibrous capsule tissue growth around a disk-shaped implant

    KAUST Repository

    Djellouli, Rabia

    2012-08-19

    We analyze the mathematical properties of the fibrous capsule tissue concentration around a disk-shaped implant. We establish stability estimates as well as monotonicity results that illustrate the sensitivity of this growth to the biocompatibility index parameters of the implant. In addition, we prove that the growth of the tissue increases exponentially in time toward an asymptotic regime. We also study the mathematical properties of the solution of the inverse problem consisting in the determination of the values of the biocompatibility index parameters from the knowledge of some fibrous capsule tissue measurements. We prove that this model calibration problem admits a unique solution, and establish a characterization of the index parameters. Furthermore, we demonstrate analytically that such a solution is not continuous with respect to the data, and therefore the considered inverse problem is ill-posed due to the lack of the stability requirement. © 2012 Springer-Verlag.

  4. [Report on 16 cases of small intestine ascariasis diagnosed by capsule endoscopy].

    Science.gov (United States)

    Wang, Pu; Li, Rong-Zhi; Huang, Zhi-Yin; Tang, Cheng-Wei

    2013-06-01

    The clinical data and capsule endoscopy image of 16 adult patients with small intestine ascariasis were reviewed and analyzed retrospectively from June 2006 to June 2012 in West China Hospital. Among the 16 patients, 15 cases manifested as gastrointestinal bleeding, 15 cases showed anemia (3 severe, 10 moderate, and 2 mild), 2 had hypoalbuminemia, 1 had peripheral blood eosinophilia. All the cases were found to be fecal occult blood positive, but no Ascaris eggs found in the feces. Capsule endoscopy showed they were infected with Ascaris worms. The worms were found in the proximal small intestine in 14 patients and 2 in the distal intestine. Mucosal erythema and erosions around the worm were observed in 3 cases, and 7 cases were found with active bleeding or old haemorrhage in small intestine.

  5. HRB-22 capsule irradiation test for HTGR fuel. JAERI/USDOE collaborative irradiation test

    Energy Technology Data Exchange (ETDEWEB)

    Minato, Kazuo; Sawa, Kazuhiro; Fukuda, Kousaku [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment] [and others

    1998-03-01

    As a JAERI/USDOE collaborative irradiation test for high-temperature gas-cooled reactor fuel, JAERI fuel compacts were irradiated in the HRB-22 irradiation capsule in the High Flux Isotope Reactor at the Oak Ridge National Laboratory (ORNL). Postirradiation examinations also were performed at ORNL. This report describes 1) the preirradiation characterization of the irradiation samples of annular-shaped fuel compacts containing the Triso-coated fuel particles, 2) the irradiation conditions and fission gas releases during the irradiation to measure the performance of the coated particle fuel, 3) the postirradiation examinations of the disassembled capsule involving visual inspection, metrology, ceramography and gamma-ray spectrometry of the samples, and 4) the accident condition tests on the irradiated fuels at 1600 to 1800degC to obtain information about fuel performance and fission product release behavior under accident conditions. (author)

  6. Conceptual shape optimization of entry vehicles applied to capsules and winged fuselage vehicles

    CERN Document Server

    Dirkx, Dominic

    2017-01-01

    This book covers the parameterization of entry capsules, including Apollo capsules and planetary probes, and winged entry vehicles such as the Space Shuttle and lifting bodies. The aerodynamic modelling is based on a variety of panel methods that take shadowing into account, and it has been validated with flight and wind tunnel data of Apollo and the Space Shuttle. The shape optimization is combined with constrained trajectory analysis, and the multi-objective approach provides the engineer with a Pareto front of optimal shapes. The method detailed in Conceptual Shape Optimization of Entry Vehicles is straightforward, and the output gives the engineer insight in the effect of shape variations on trajectory performance. All applied models and algorithms used are explained in detail, allowing for reconstructing the design tool to the researcher’s requirements. Conceptual Shape Optimization of Entry Vehicles will be of interest to both researchers and graduate students in the field of aerospace engineering, an...

  7. [Tri-dimensional omics analysis on effect of zhuanggu zhitong capsule against experimental postmenopausal osteoporosis].

    Science.gov (United States)

    Li, Jin-Ping; Zeng, Ying; Lei, Xiao-Ming; Zhang, Guo-Min; Liu, Hui-Ping; Mo, Xin-Min

    2014-08-01

    To propose the new concept of multidimensional omics, and define that the multidimensional omics is a proper method for studying the material base and mechanism of traditional Chinese medicine (TCM) compounds. Zhuanggu Zhitong capsule was taken for example to study its effect against experimental postmenopausal osteoporosis. From the perspective of chemi-omics, genomics and proteomics of TCM, it systematically interpreted the efficacious materials and mechanisms of Zhuanggu Zhitong capsule in preventing and treating experimental postmenopausal osteoporosis, while taking the lead in designing a three dimensional form to intuitively exhibit the results of the multidimensional omics study. This study provides a new idea and solution for studies on the efficacious materials and mechanisms of TCM compounds.

  8. A four spiral slots microstrip patch antenna for radiotelemetry capsules based on FDTD

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Antenna is very crucial to radiotelemetry capsules which can measure the physiological parameters of the gastrointestinal (GI) tract. The objective of this paper is to design a novel spiral slots microstrip patch antenna for the radiotelemetry capsules communicating with external recorder at 915 MHz located in ISM (Industry, Science, and Medical) bands. The microstrip patch antenna is designed and evaluated using the finite-difference time-domain (FDTD) method. Return loss characteristics and the effect of the human body on resonant frequency are analyzed, and the performances of radiation patterns at different positions of the human alimentary tract are also estimated. Finally, specific absorption rate (SAR) computations are performed, and the peak 1-g and 10-g SAR values are calculated. According to the peak SAR values, the maximum delivered power for the designed antenna was found so that the SAR values of the antenna satisfy the ANSI (American National Standards Institute) limitations.

  9. Formulation, Development and Evaluation of delayed release capsules of Duloxetine Hydrochloride made of different Enteric Polymers

    Directory of Open Access Journals (Sweden)

    Pallavi Yerramsetty

    2012-03-01

    Full Text Available Delayed release systems have acquired a centre stage in the arena of pharmaceutical research and development. The present study involves formulation and evaluation of Duloxetine Hydrochloride delayed release capsules. Duloxetine Hydrochloride is an acid labile drug. It degrades in the acidic environment of the stomach thus leading to therapeutic inefficacy. Therefore it is necessary to bypass the acidic pH of the stomach which can be achieved by formulating delayed release dosage form by using different enteric polymers. Protection of drug from acidic environment is done by coating the drug with enteric polymers by using suspension layering technique in Fluidized bed processor (FBP with different enteric polymers like HPMCAS (Hydroxy Propyl Methyl Cellulose Acetate Succinate, Acryl EZE and HPMCP (Hydroxy propyl methyl cellulose phthalate.The formulation (E12 of delayed release capsules of Duloxetine Hydrochloride containing HPMCP (HP-55: HP- 50 as enteric polymer can be taken as optimized

  10. Fis is essential for capsule production in Pasteurella multocida and regulates expression of other important virulence factors.

    Directory of Open Access Journals (Sweden)

    Jason A Steen

    2010-02-01

    Full Text Available P. multocida is the causative agent of a wide range of diseases of animals, including fowl cholera in poultry and wild birds. Fowl cholera isolates of P. multocida generally express a capsular polysaccharide composed of hyaluronic acid. There have been reports of spontaneous capsule loss in P. multocida, but the mechanism by which this occurs has not been determined. In this study, we identified three independent strains that had spontaneously lost the ability to produce capsular polysaccharide. Quantitative RT-PCR showed that these strains had significantly reduced transcription of the capsule biosynthetic genes, but DNA sequence analysis identified no mutations within the capsule biosynthetic locus. However, whole-genome sequencing of paired capsulated and acapsular strains identified a single point mutation within the fis gene in the acapsular strain. Sequencing of fis from two independently derived spontaneous acapsular strains showed that each contained a mutation within fis. Complementation of these strains with an intact copy of fis, predicted to encode a transcriptional regulator, returned capsule expression to all strains. Therefore, expression of a functional Fis protein is essential for capsule expression in P. multocida. DNA microarray analysis of one of the spontaneous fis mutants identified approximately 30 genes as down-regulated in the mutant, including pfhB_2, which encodes a filamentous hemagglutinin, a known P. multocida virulence factor, and plpE, which encodes the cross protective surface antigen PlpE. Therefore these experiments define for the first time a mechanism for spontaneous capsule loss in P. multocida and identify Fis as a critical regulator of capsule expression. Furthermore, Fis is involved in the regulation of a range of other P. multocida genes including important virulence factors.

  11. Attachment and invasion of Neisseria meningitidis to host cells is related to surface hydrophobicity, bacterial cell size and capsule.

    Directory of Open Access Journals (Sweden)

    Stephanie N Bartley

    Full Text Available We compared exemplar strains from two hypervirulent clonal complexes, strain NMB-CDC from ST-8/11 cc and strain MC58 from ST-32/269 cc, in host cell attachment and invasion. Strain NMB-CDC attached to and invaded host cells at a significantly greater frequency than strain MC58. Type IV pili retained the primary role for initial attachment to host cells for both isolates regardless of pilin class and glycosylation pattern. In strain MC58, the serogroup B capsule was the major inhibitory determinant affecting both bacterial attachment to and invasion of host cells. Removal of terminal sialylation of lipooligosaccharide (LOS in the presence of capsule did not influence rates of attachment or invasion for strain MC58. However, removal of either serogroup B capsule or LOS sialylation in strain NMB-CDC increased bacterial attachment to host cells to the same extent. Although the level of inhibition of attachment by capsule was different between these strains, the regulation of the capsule synthesis locus by the two-component response regulator MisR, and the level of surface capsule determined by flow cytometry were not significantly different. However, the diplococci of strain NMB-CDC were shown to have a 1.89-fold greater surface area than strain MC58 by flow cytometry. It was proposed that the increase in surface area without changing the amount of anchored glycolipid capsule in the outer membrane would result in a sparser capsule and increase surface hydrophobicity. Strain NMB-CDC was shown to be more hydrophobic than strain MC58 using hydrophobicity interaction chromatography and microbial adhesion-to-solvents assays. In conclusion, improved levels of adherence of strain NMB-CDC to cell lines was associated with increased bacterial cell surface and surface hydrophobicity. This study shows that there is diversity in bacterial cell surface area and surface hydrophobicity within N. meningitidis which influence steps in meningococcal pathogenesis.

  12. Preparation of novel polysulfone capsules containing zirconium phosphate and their properties for Pb{sup 2+} removal from aqueous solution

    Energy Technology Data Exchange (ETDEWEB)

    Ma Xiaojie [College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, College of Resources and Environment, Institute of Biochemical Engineering and Environmental Technology, Lanzhou University, Lanzhou 730000 (China); Li Yanfeng, E-mail: liyf@lzu.edu.cn [College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, College of Resources and Environment, Institute of Biochemical Engineering and Environmental Technology, Lanzhou University, Lanzhou 730000 (China); Li Xiaoli; Yang Liuqing [College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, College of Resources and Environment, Institute of Biochemical Engineering and Environmental Technology, Lanzhou University, Lanzhou 730000 (China); Wang Xueyan [Yantai Professional School of Automobile Engineering, Yantai 265500 (China)

    2011-04-15

    Zirconium phosphate (ZrP) was immobilized by microencapsulation process of polysulfone (PSF) to form the polysulfone capsules containing ZrP (PSF-ZrP capsules) successfully by using phase inversion precipitation technique, and the PSF-ZrP was employed as capsules adsorbents to remove Pb{sup 2+} presented in aqueous solution. The result shows that an encapsulation capacity of 50% (mass ratio, PSF: ZrP = 1:1) should be the optimal proportion of ZrP encapsulated with PSF. The characterization of the macroscopical and microcosmic physical properties of the resulting PSF-ZrP capsules was carried out by the DTA-TG, XRD, BET and SEM. Meanwhile, the adsorption properties of the PSF-ZrP capsules for Pb{sup 2+} were investigated by batch methods. It was found that the adsorption of the PSF-ZrP capsules for Pb{sup 2+} would be pH dependent due to the ion-exchange mechanism, and the uptake of Pb{sup 2+} was slightly influenced with the concentration of coexisting cations (Na{sup +}, K{sup +}) in a low range. Furthermore, the calculated thermodynamics parameters exhibit that the nature of the adsorption process is spontaneous and exothermic. After six times of adsorption-regeneration cycles, no significant loss of adsorption capacity was observed, indicating the good stability of the PSF-ZrP capsules. Consequently, the PSF-ZrP capsules in this work can provide a potential application for treatment process of Pb{sup 2+}-containing wastewater.

  13. Mechanism of treating ischemic stroke by atorvastatin combined with Huoxuetongmai capsules

    Institute of Scientific and Technical Information of China (English)

    Bei-Hua Wu; Xiao-Hui Zhao

    2016-01-01

    Objective:To investigate the mechanism of treating ischemic stroke by atorvastatin combined with Huoxuetongmai capsules, for helping clinical treatment of ischemic stroke. Methods:A total of 160 cases of patients with ischemic stroke were selected, and randomly divided into observation group and control group, each group was 80 cases, control group was given conventional treatment, and observation group was given atorvastatin combined with Huoxuetongmai capsules based on the above conventional treatment, the changes of hemodynamic indexes, inflammation factors and coagulation function related indexes in patients with ischemic stroke were detected before and after treatment.Results:The comparison of hemodynamic indexes, inflammation factors and coagulation function related indexes in the two groups before treatment was not statistically significant. Compared with before treatment, hemodynamic indexes (whole blood high shear viscosity, whole blood low shear viscosity, plasma viscosity, maximum red blood cell aggregation index and hematocrit) and inflammation factors (IL-6, IL-8, CRP and TNF-α) in observation group after treatment by atorvastatin combined with Huoxuetongmai capsules significantly decreased, while coagulation function related indexes (FIB, DDI, TXB2 and PAI-1) significantly increased, and were considered to be statistically significant. Compared with control group after treatment, hemodynamic indexes, coagulation function related indexes (FIB, DDI, TXB2 and PAI-1) and inflammation factor in observation group after combined treatment significantly decreased, while PT significantly increased, there were statistically significant difference between the groups.Conclusion:The treatment of ischemic stroke by atorvastatin combined with Huoxuetongmai capsules could improve hemodynamic indexes, inflammation factors and coagulation function related indexes in patients with ischemic stroke, and provide help for clinical treatment of ischemic stroke.

  14. Deformation of a Capsule in a Power-Law Shear Flow

    Directory of Open Access Journals (Sweden)

    Fang-Bao Tian

    2016-01-01

    Full Text Available An immersed boundary-lattice Boltzmann method is developed for fluid-structure interactions involving non-Newtonian fluids (e.g., power-law fluid. In this method, the flexible structure (e.g., capsule dynamics and the fluid dynamics are coupled by using the immersed boundary method. The incompressible viscous power-law fluid motion is obtained by solving the lattice Boltzmann equation. The non-Newtonian rheology is achieved by using a shear rate-dependant relaxation time in the lattice Boltzmann method. The non-Newtonian flow solver is then validated by considering a power-law flow in a straight channel which is one of the benchmark problems to validate an in-house solver. The numerical results present a good agreement with the analytical solutions for various values of power-law index. Finally, we apply this method to study the deformation of a capsule in a power-law shear flow by varying the Reynolds number from 0.025 to 0.1, dimensionless shear rate from 0.004 to 0.1, and power-law index from 0.2 to 1.8. It is found that the deformation of the capsule increases with the power-law index for different Reynolds numbers and nondimensional shear rates. In addition, the Reynolds number does not have significant effect on the capsule deformation in the flow regime considered. Moreover, the power-law index effect is stronger for larger dimensionless shear rate compared to smaller values.

  15. Effect of Guizhifuling capsule combined with levonorgestrel releasing intrauterine system on adenomyosis

    Institute of Scientific and Technical Information of China (English)

    Dong-Tao Shi; Rui Bai

    2016-01-01

    Objective:To explore the clinical efficacy of Guizhifuling capsule combined with levonorgestrel releasing intrauterine system (LNG-IUS) in the treatment of adenomyosis (AM). Methods: A total of 80 patients with AM who were admitted in our hospital from February, 2015 to February, 2016 were included in the study and randomized into the study group and the control group. LNG-IUS was placed in patients in the two groups 7 d after menstruation. The patients in the study group were given additional Guizhifuling capsule, 3 capsules/time, 3 times/d, and the drug was withdrawn in the menstrual period. Six-month treatment was regarded as one course. PBAC was used to evaluate the menstrual blood volume before and after treatment. The chronic pain grading questionnaire method was used for dysmenorrhea degree rating. The vaginal B ultrasound 3 d after menstruation was performed to detect the uterine volume. E2, FSH, LH, and serum CA125 level before and after treatment were detected.Results: The menstrual blood volume, dysmenorrhea degree, and uterine volume after treatment in the two groups were significantly reduced when compared with before treatment (P0.05). After treatment, CA125 level in the two groups was significantly reduced when compared with before treatment (P<0.05), and the reduced degree in the study group was significantly superior to that in the control group (P<0.05).Conclusions:Guizhifuling capsule combined with LNG-IUS in the treatment of AM can significantly improve the clinical symptoms, effectively reduce CA125 level, and has no significant effect on the sex hormone levels with a satisfactory clinical efficacy; therefore, it deserves to be widely recommended in the clinic.

  16. High sensitivity of quick view capsule endoscopy for detection of small bowel Crohn's disease

    DEFF Research Database (Denmark)

    Halling, Morten Lee; Nathan, Torben; Kjeldsen, Jens;

    2014-01-01

    Capsule endoscopy (CE) has a high sensitivity for diagnosing small bowel Crohn's disease, but video analysis is time consuming. The quick view (qv) function is an effective tool to reduce time consumption. The aim of this study was to determine the rate of missed small bowel ulcerations with qv......-CE compared to standard view and the diagnostic accuracy of qv-CE in suspected Crohn's disease....

  17. Evaluation by computed tomography of the destruction of the internal capsule in hypertensive intracerebral hemorrhage

    Energy Technology Data Exchange (ETDEWEB)

    Tomita, Yukio; Ohuchi, Tadao; Yukawa, Hideki; Konno, Jyoji; Saiki, Iwao (Iwate Medical Coll., Morioka (Japan). School of Medicine)

    1983-12-01

    Seventy-five patients, 37 with putaminal hemorrhage and 38 with thalamic hemorrhage. were examined by CT immediately after the ictus and while the patients were undergoing conservative treatment. The distance was measured on every CT from the center of the pineal body to the inside edge of the hematoma in the putaminal hemorrhage and to the outside edge in the thalamic hemorrhage, by using a slice 5 cm above the orbitomeatal line on which the pineal body was clearly recognizable. At 6 months after ictus, recuperations from hemiplegia were estimated in all patients and compared with the degree of the measured distance on CT. In the group of patients who had recovered completely from hemiplegia, the degrees were more than 28 mm in the cases of putaminal hemorrhage and less than 32 mm in the cases of thalamic hemorrhage. If the degrees were under 25 mm in the putaminal hemorrhage or over 36 mm in the thalamic hemorrhage, no rehabilitation was effective for their paralytic upper extremities. Measurements of the internal capsule were also performed on three fresh brains without cerebral disease. The normal values of the distance were 34.7+-1.0 mm from the center of the pineal body to the outside edge of the posterior limb of the internal capsule and 25.0+-0.9 mm to its inside edge. Judging from these results, it is thought that the attainable limits of avoiding destruction of the posterior limb of the internal capsule by the hematoma are 28 mm in the case of a putaminal hemorrhage and 32 mm in the case of a thalamic hemorrhage. Therefore, it was considered that the internal capsule can be shifted about 7 mm to the medial or lateral side without any direct or indirect effects from the hematoma.

  18. Childhood Vitamin A Capsule Supplementation Coverage in Nigeria: A Multilevel Analysis of Geographic and Socioeconomic Inequities

    OpenAIRE

    Olatunde Aremu; Stephen Lawoko; Koustuv Dalal

    2010-01-01

    Vitamin A deficiency (VAD) is a huge public health burden among preschool-aged children in sub-Saharan Africa, and is associated with a high level of susceptibility to infectious diseases and pediatric blindness. We examined the Nigerian national vitamin A capsule (VAC) supplementation program, a short-term cost-effective intervention for prevention of VAD-associated morbidity for equity in terms of socioeconomic and geographic coverage. Using the most current, nationally representative data ...

  19. Small bowel involvement documented by capsule endoscopy in Churg-Strauss syndrome

    Science.gov (United States)

    Beye, Birane; Lesur, Gilles; Claude, Pierre; Martzolf, Lionel; Kieffer, Pierre; Sondag, Daniel

    2015-01-01

    Churg-Strauss syndrome is a small and medium vessel vasculitis and is also known as allergic granulomatous angiitis. Gastrointestinal involvement is common in patients with Churg-Strauss syndrome (20-50%). The most common symptoms are abdominal pain, diarrhoea and occasionally gastrointestinal bleeding and perforation. We present a case of Churg-Strauss syndrome with small bowel lesions documented by video capsule endoscopy. PMID:26664542

  20. Modern aspects of physical rehabilitation after football injuries of the capsule-ligament knee

    Directory of Open Access Journals (Sweden)

    Parish Mokhammad Reza

    2011-11-01

    Full Text Available It is considered the most typical causes of damage to the musculoskeletal system in football. Showing contemporary approaches to physical rehabilitation, reconstruction of the capsule-ligament knee athletes after surgery by arthroscopy. It is shown the various recovery tools and terms of use. It is established that the widespread development of arthroscopy, requires a balanced complex of physical rehabilitation. Complexes should reduce postoperative complications and gradual adaptation to favor the player to the training load.

  1. Halogen bonded supramolecular capsules: a challenging test case for quantum chemical methods.

    Science.gov (United States)

    Sure, Rebecca; Grimme, Stefan

    2016-08-02

    Recently, Diederich et al. synthesized the first supramolecular capsule with a well-defined four-point halogen bonding interaction [Angew. Chem., Int. Ed., 2015, 54, 12339]. This interesting system comprising about 400 atoms represents a challenging test case for accurate quantum chemical methods. We investigate it with our new density functional based composite method for structures and noncovalent interactions (PBEh-3c) as well as our standard protocol for supramolecular thermochemistry and give predictions for chemical modifications to improve the binding strength.

  2. Tethered capsule OCT endomicroscopy for upper gastrointestinal tract imaging by using ball lens probe (Conference Presentation)

    Science.gov (United States)

    Dong, Jing; Gora, Michalina J.; Reddy, Rohith; Trasischker, Wolfgang; Poupart, Oriane; Lu, Weina; Carruth, Robert W.; Grant, Catriona N.; Soomro, Amna R.; Tiernan, Aubrey R.; Rosenberg, Mireille; Nishioka, Norman S.; Tearney, Guillermo J.

    2016-03-01

    While endoscopy is the most commonly used modality for diagnosing upper GI tract disease, this procedure usually requires patient sedation that increases cost and mandates its operation in specialized settings. In addition, endoscopy only visualizes tissue superfically at the macroscopic scale, which is problematic for many diseases that manifest below the surface at a microscopic scale. Our lab has previously developed technology termed tethered capsule OCT endomicroscopy (TCE) to overcome these diagnostic limitations of endoscopy. The TCE device is a swallowable capsule that contains optomechanical components that circumferentially scan the OCT beam inside the body as the pill traverses the organ via peristalsis. While we have successfully imaged ~100 patients with the TCE device, the optics of our current device have many elements and are complex, comprising a glass ferrule, optical fiber, glass spacer, GRIN lens and prism. As we scale up manufacturing of this device for clinical translation, we must decrease the cost and improve the manufacturability of the capsule's optical configuration. In this abstract, we report on the design and development of simplificed TCE optics that replace the GRIN lens-based configuration with an angle-polished ball lens design. The new optics include a single mode optical fiber, a glass spacer and an angle polished ball lens, that are all fusion spliced together. The ball lens capsule has resolutions that are comparable with those of our previous GRIN lens configuration (30µm (lateral) × 7 µm (axial)). Results in human subjects show that OCT-based TCE using the ball lens not only provides rapid, high quality microstructural images of upper GI tract, but also makes it possible to implement this technology inexpensively and on a larger scale.

  3. Wireless capsule endoscopy and proximal small bowel lesions in Crohn’s disease

    Institute of Scientific and Technical Information of China (English)

    Carmelina; Petruzziello; Sara; Onali; Emma; Calabrese; Francesca; Zorzi; Marta; Ascolani; Giovanna; Condino; Elisabetta; Lolli; Paola; Naccarato; Francesco; Pallone; Livia; Biancone

    2010-01-01

    AIM: To investigate the prevalence of proximal small bowel (SB) lesions detected by wireless capsule endoscopy (WCE) in Crohn's disease (CD). METHODS: WCE was performed in 64 patients: 32 with CD of the distal ileum, and 32 controls with iron-deficiency anemia (IDA) or diarrhea. WCE was performed using the Given SB-WCE, followed by small intestine contrast ultrasonography (SICUS). Findings compatible with CD by using WCE included erosions, aphthoid or deep ulcers, and strictures/stenosis. RESULTS: WCE detec...

  4. Unawareness of a Prolonged Retained Capsule Endoscopy: The Importance of Careful Follow-Up and Cooperation between Medical Institutions

    Directory of Open Access Journals (Sweden)

    Susumu Saigusa

    2014-01-01

    Full Text Available A 50-year-old man with anemia was referred to our hospital to undergo capsule endoscopy (CE, which revealed small intestinal ulcers. After 5 months of CE, he returned because of recurrent anemia without abdominal symptoms. Abdominal X-ray and computed tomography showed capsule retention in the small intestine at the pelvic cavity. The capsule remained at the same place for 7 days. We performed capsule retrieval by laparoscopy-assisted surgery with resection of the involved small intestine, including an ileal stricture. Resected specimen showed double ulcers with different morphologies, an ulcer scar with stricture, and a wide ulcer at the proximal side of the others. Each ulcer had different histopathological findings such as the degree of fibrosis and monocyte infiltration. These differences led us to consider that the proximal ulcer may have been secondarily induced by capsule retention. Our experience indicated that careful follow-up and the cooperation between medical institutions after CE examination should be undertaken for patients with incomplete examination, unknown excretion of the capsule, and/or ulcerative lesions despite the lack of abdominal symptoms. Additionally, a retained CE remaining over long periods and at the same place in the small intestine may lead to secondary ulceration.

  5. Analysis of the conditions of experiments on the compression of capsules with a foam absorber at Iskra V facility

    Energy Technology Data Exchange (ETDEWEB)

    Demchenko, N N; Doskoch, I Y; Gus' kov, S Y; Rozanov, V B; Stepanov, R V; Yakhin, R A [P. N. Lebedev Physical Institute of RAS, Moscow (Russian Federation); Garanin, S G; Suslov, N A; Zhidkov, N V [Russian Federation Nuclear Center - VNIIEF, Sarov (Russian Federation); Gatin, A A; Tishkin, V F; Zmitrenko, N V [Institute of Mathematical Modelling of RAS, Moscow (Russian Federation)], E-mail: rozanov@sci.lebedev.ru

    2008-05-15

    The compression conditions are analyzed and the capsules are discussed for the energy of {approx}2 kJ and pulse duration of {approx}0.5 ns at the second harmonic of an iodine laser ({lambda} = 0.66 {mu}m) under irradiation by a small number of beams at Iskra V facility (the facility has 12 beams, which are focused in a certain way onto the capsule). The authors consider different capsules filled with DT gas: the glass capsules (the inner radius is 260 {mu}m; the thickness, 1.2-1.3 {mu}m; the aspect ratio A = 200) experimentally examined with Iskra V; the capsules made of polystyrene (R = 140-170 {mu}m; {delta} = 5-10 {mu}m; A = 14-34), and the capsules made of polystyrene and covered by a foam absorber (R = 140-170 {mu}m; {delta} = 5-10 {mu}m; A = 14-34, foam absorber {delta} = 150 {mu}m) - 'Laser Greenhouse'.

  6. Langmuir and Langmuir-Blodgett films of capsules of haemoglobin at air/water and solid/air interfaces

    Indian Academy of Sciences (India)

    J Maheshkumar; A Dhathathreyan

    2013-03-01

    Organized assemblies of capsules of haemoglobin (Hb), in the size range of 0.1 to 0.3 in Langmuir films have been studied at air/water interface below and above the isoelectric point. Spread films of these organizates suggest that there is no expulsion of individual particles or particle assemblies at the interface and the particles are stable. Dynamic surface tension and the associated dilational and shear visco-elasticity in these films suggest that the capsules are highly elastic. Multilayer films of the capsules using Langmuir-Blodgett technique have been fabricated by sequential deposition on solid surfaces. These films have been characterized by circular dichroism spectroscopy (CD), atomic force microscopy (AFM), quartz crystal microbalance (QCM) and Fourier transform infrared with reflection absorption spectroscopy (FTIR-RAS). No appreciable change in the secondary structural features of Hb is seen from CD studies indicating the stability of the protein in these organized assemblies. Sizes of these capsules change near the isoelectric point and large swollen multiwalled capsules are formed. The elastic films of capsules of Hb provide a useful post preparation approach for modification of the surface roughness, porosity, and permeability of pre-assembled polypeptide microcapsules.

  7. HANARO instrumented capsule development for supporting a study on the irradiation damage of stainless steels for nuclear applications

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Y. H.; Cho, M. S.; Sohn, J. M.; Kim, H. R.; Lee, B. C.; Kim, K. H

    2000-10-01

    As a part of the program for the maximum utilization of HANARO by MOST, Korea, an instrumented capsule (00M-01U) was designed and fabricated for supporting a study on the irradiation damage of stainless steels for nuclear applications. The basic structure of the capsule for the irradiation of Stainless steels was based on that of the 99M-01K capsule irradiated successfully in HANARO. To satisfy the user requirements such as irradiation temperature and neutron fluence, the optimal arrangement of test specimens was done in the axial and circumferential direction. The temperature distribution and thermal stress of a capsule with multi-holes were obtained by a finite element analysis code, ANSYS. From these analyzed data, this capsule was found to be compatible with HANARO design requirement. Various types of specimens such as small tensile, Charpy, TEM and EPMA specimens were inserted in the capsule. The specimens will be irradiated in the IR2 test hole of HANARO at 288, 300 and 350 deg C up to a fast neutron fluence of 1.0x10{sup 20}(n/cm{sup 2})(E>1.0MeV)

  8. Compounding slow-release capsules: a comprehensive review and an Excel spreadsheet for faster calculations of excipients.

    Science.gov (United States)

    Zur, Eyal

    2013-01-01

    Compounding pharmacists throughout the world are compounding a special type of capsule called "slow-release." This type of capsule is a compounding pharmacy application of the commercial hydrophilic matrix tablets. It is a relatively simple system that allows formulating a robust, reliable, and consistent drug system based on 30% w/w to 40% w/w of specific types of hydroxypropyl methylcellulose. The main purpose of these capsules is to attenuate the drug release when there is a clinical need and no commercial medication exists. Five in vitro trials verified and proved this kind of preparation can be compounded by specialized pharmacists achieving substantial attenuation of drug release that resembles the pharmacokinetic profiles of commercial slow-release medications. An in-depth explanation of the mechanism of action of the slow-release capsules is provided. Since the pharmaceutical calculations needed to compound this preparation are time consuming, a suggestion of a faster way to perform these calculations by using a special Excel spreadsheet is provided. The article demonstrates a special table with a comparison between the specifications, results, and conclusions of the five in vitro trials that evaluated the pharmacokinetic rates of compounded slow-release capsules. The regulatory aspect of compounding slow-release capsules is also discussed.

  9. Profile of collagen gene expression in the glenohumeral capsule of patients with traumatic anterior instability of the shoulder,

    Directory of Open Access Journals (Sweden)

    Paulo Santoro Belangero

    2014-12-01

    Full Text Available Objective:To evaluate the expression of the genes COL1A1, COL1A2, COL3A1 and COL5A1 in the glenohumeral capsule of patients with traumatic anterior instability of the shoulder.Methods:Samples from the glenohumeral capsule of 18 patients with traumatic anterior instability of the shoulder were evaluated. Male patients with a positive grip test and a Bankart lesion seen on magnetic resonance imaging were included. All the patients had suffered more than one episode of shoulder dislocation. Samples were collected from the injured glenohumeral capsule (anteroinferior region and from the macroscopically unaffected region (anterosuperior region of each patient. The expression of collagen genes was evaluated using the polymerase chain reaction after reverse transcription with quantitative analysis (qRT-PCR.Results:The expression of COL1A1, COL1A2 and COL3A1 did not differ between the two regions of the shoulder capsule. However, it was observed that the expression of COL5A1 was significantly lower in the anteroinferior region than in the anterosuperior region (median ± interquartile range: 0.057 ±0.052 vs. 0.155 ±0.398; p = 0.028 of the glenohumeral capsule.Conclusion:The affected region of the glenohumeral capsule in patients with shoulder instability presented reduced expression of COL5A1.

  10. Effects of pH regulators used as additives on the bioavailability of ibuprofen from hard gelatin capsules.

    Science.gov (United States)

    Hannula, A M; Marvola, M; Rajamaeki, M; Ojantakanen, S

    1991-01-01

    In our previous study the reasons for fast absorption of ibuprofen from sodium bicarbonate based hard gelatin capsules stayed unclear. These were not investigated using pH regulators (aluminium hydroxide, calcium carbonate, tartaric acid) with different chemical and physical properties. Ibuprofen absorption was much slower with aluminium hydroxide capsules (MRT 5.3, Tmax 3.1 h, Cmax 25.6 mg l-1, lag time 37.5 min) than with sodium bicarbonate capsules of the previous study (MRT 2.6 h, tmax 0.4 h, Cmax 51.4 mg l-1), lag time 0 min). The corresponding values for calcium carbonate and tartaric acid capsules were: MRT 3.7 h and 3.9 h, Tmax 1.7 h and 2.0 h, Cmax 32.2 mg l-1 and 30.8 mg l-1 and lag time 3.1 min and 7.6 min. No differences were noted in the AUC values. A rank order correlation existed between dissolution parameters and the in vivo parameters reflecting the rate of bioavailability. It was concluded that the rapid absorption of ibuprofen from capsules containing sodium carbonate is due to enhanced in vivo disintegration of the capsule, enhanced in vivo dissolution of the drug and enhanced gastric emptying rate.

  11. Are all cigarettes just the same? Female's perceptions of slim, coloured, aromatized and capsule cigarettes.

    Science.gov (United States)

    Moodie, Crawford; Ford, Allison; Mackintosh, Anne; Purves, Richard

    2015-02-01

    Twelve focus groups in Glasgow (Scotland) were conducted with female non-smokers and occasional smokers aged 12-24 years (N = 75), with each group shown 11 cigarettes: two (standard) cigarettes with cork filters; two coloured cigarettes (pink or brown); four slim cigarettes; an aromatized black cigarette; a menthol cigarette and a cigarette with a flavour-changing rupturable capsule in the filter. Participants were asked to rank the cigarettes by appeal, taste and harm. The capsule cigarette was then discussed in depth. The pink coloured cigarette and slim cigarettes created significant interest and were generally perceived as most appealing and pleasant tasting, and least harmful. The black aromatized cigarette received a mixed response, with some disliking the dark colour and associating it with low appeal, strong taste and increased harm, whereas for others the smell helped to enhance appeal and taste perceptions and lower perceptions of harm. The novel capsule cigarette, when discussed in-depth, was viewed very positively. Just as research shows that cigarette packs can influence perceptions of appeal, harm and taste, this study suggests that the actual cigarettes can do likewise. The findings have implications for tobacco education and policy.

  12. Capsule Pipeline Research Center. 3-year Progress report, September 1, 1993--August 31, 1994

    Energy Technology Data Exchange (ETDEWEB)

    1994-04-01

    The Capsule Pipeline Research Center is devoted to performing research in capsule pipelines so that this emerging technology can be developed for early use to transport solids including coal, grain, other agricultural products, solid wastes, etc. Important research findings and accomplishments during the first-three years include: success in making durable binderless coal logs by compaction, success in underwater extrusion of binderless coal logs, success in compacting and extruding coal logs with less than 3% hydrophobic binder at room temperature, improvement in the injection system and the pump-bypass scheme, advancement in the state-of-the-art of predicting the energy loss (pressure drop) along both stationary and moving capsules, demonstrated the effectiveness of using polymer for drag reduction in CLP, demonstrated the influence of zeta potential on coal log fabrication, improved understanding of the water absorption properties of coal logs, better understanding of the mechanism of coal log abrasion (wear), completed a detailed economic evaluation of the CLP technology and compared coal transportation cost by CLP to that by rail, truck and slurry pipelines, and completion of several areas of legal research. The Center also conducted important technology transfer activities including workshops, work sessions, company seminars, involvement of companies in CLP research, issuance of newsletters, completion of a video tape on CLP, and presentation of research findings at numerous national and international meetings.

  13. Capsule Endoscopy for Crohn’s Disease: Current Status of Diagnosis and Management

    Directory of Open Access Journals (Sweden)

    Dong-Hoon Yang

    2016-01-01

    Full Text Available Crohn’s disease (CD is an idiopathic inflammatory bowel disease involving the small and/or large intestine. More than 50% of Western CD patients and up to 88% of Asian CD patients may have small intestinal involvement. Video capsule endoscopy (VCE has a higher diagnostic yield than small bowel barium radiography and computed tomography enterography for the detection of small intestinal involvement of CD. VCE also provides diagnostic yields comparable to magnetic resonance- (MR- based enterography or enteroclysis and may have several advantages over MR-based tests for the detection of early small intestinal lesions. Several studies have suggested the use of VCE-based disease activity scoring systems to evaluate small intestinal mucosal disease activity, although their clinical relevance needs to be further studied. A possible indication for VCE is recurrence monitoring after complete surgical excision of CD-involved segments but its usefulness and efficacy compared with conventional endoscopy should be evaluated. The capsule retention rate ranges from 0 to 5.4% in suspected CD patients and from 0 to 13.2% in established CD patients. If VCE is necessary, significant small bowel stricture should be ruled out before VCE by performing a patency capsule study and/or small bowel radiological study in suspected or established CD patients.

  14. Automatic Polyp Detection in Pillcam Colon 2 Capsule Images and Videos: Preliminary Feasibility Report

    Directory of Open Access Journals (Sweden)

    Pedro N. Figueiredo

    2011-01-01

    Full Text Available Background. The aim of this work is to present an automatic colorectal polyp detection scheme for capsule endoscopy. Methods. PillCam COLON2 capsule-based images and videos were used in our study. The database consists of full exam videos from five patients. The algorithm is based on the assumption that the polyps show up as a protrusion in the captured images and is expressed by means of a P-value, defined by geometrical features. Results. Seventeen PillCam COLON2 capsule videos are included, containing frames with polyps, flat lesions, diverticula, bubbles, and trash liquids. Polyps larger than 1 cm express a P-value higher than 2000, and 80% of the polyps show a P-value higher than 500. Diverticula, bubbles, trash liquids, and flat lesions were correctly interpreted by the algorithm as nonprotruding images. Conclusions. These preliminary results suggest that the proposed geometry-based polyp detection scheme works well, not only by allowing the detection of polyps but also by differentiating them from nonprotruding images found in the films.

  15. Entry, Descent, and Landing Operations Analysis for the Genesis Entry Capsule

    Science.gov (United States)

    Desai, Prasun N.; Lyons, Daniel T.

    2007-01-01

    On September 8, 2004, the Genesis spacecraft returned to Earth after spending 29 months about the sun-Earth libration point (L1) collecting solar wind particles. Four hours prior to Earth arrival, the sample return capsule containing the samples was released for entry and subsequent landing at the Utah Test and Training Range. This paper provides an overview of the entry, descent, and landing trajectory analysis that was performed during the mission operations phase leading up to final approach to Earth. The final orbit determination solution produced an inertial entry flight-path angle of -8.002 deg (which was the desired nominal value) with a 3-sigma error of +/-0.0274 deg (a third of the requirement). The operations effort accurately delivered the entry capsule to the desired landing site. The final landing location was 8.3 km from the target, and was well within the allowable landing area. Overall, the Earth approach operation procedures worked well and there were no issues (logistically or performance based) that arose. As a result, the process of targeting a capsule from deep space and accurately landing it on Earth was successfully demonstrated.

  16. A new endocapsular open ring for prevention of anterior and posterior capsule opacification

    Directory of Open Access Journals (Sweden)

    Pallikaris IG

    2016-11-01

    Full Text Available Ioannis G Pallikaris, Nela R Stojanovic, Harilaos S Ginis Institute of Vision and Optics, Department of Medicine, University of Crete, Heraklion, Crete, Greece Purpose: The aim of this study is to demonstrate the functionality of a new design of a thick endocapsular open ring for prevention of anterior capsule opacification (ACO and posterior capsule opacification (PCO. Setting: The Institute of Vision and Optics, University of Crete and University Hospital of Heraklion, Crete, Greece. Design: Prospective, interventional pilot study. Methods: Fifteen patients (17 eyes underwent cataract surgery with phacoemulsification. During surgery, a thick endocapsular open ring (peripheral capsule reconstructor was inserted into the capsular bag, prior to intraocular lens (IOL implantation. Six different models of IOL were implanted. Postoperatively, the degree of ACO and PCO was evaluated and described as none, mild, moderate, or severe. Results: The mean follow-up period was 30±8.06 months (range: 12–36 months. At the last follow-up, mild PCO was observed in only three eyes and mild ACO in three patients. The centration of IOLs was good in all but one eye, which had a tilted IOL. Conclusion: The results of this pilot study suggest that the implantation of a new design of thick endocapsular open ring is feasible and may contribute to the prevention of PCO and ACO after cataract surgery. Keywords: intraocular implant, cataract, phacoemulsification, silicone

  17. Magnetic resonance imaging of shoulders with idiopathic adhesive capsulitis: reliability of measures

    Energy Technology Data Exchange (ETDEWEB)

    Lefevre-Colau, Marie-Martine; Fayad, Fouad; Rannou, Francois; Demaille-Wlodyka, Samantha; Mayoux-Benhamou, Marie-Anne; Poiraudeau, Serge; Revel, Michel [Universite Rene Descartes, Department of Physical and Rehabilitation Medicine, Hopital Cochin (AP-HP), Paris (France); Drape, Jean-Luc; Diche, Thierry; Minvielle, Francois [Hopital Cochin (AP-HP), Department of Radiology B, Paris (France); Fermanian, Jacques [Universite Rene Descartes, Department of Biostatistics, Hopital Necker (AP-HP), Paris (France)

    2005-12-01

    The magnetic resonance imaging (MRI) findings in idiopathic adhesive capsulitis (AC) were compared with those of contralateral healthy shoulders and the reliability of measures assessed. Twenty-six consecutive patients (26 AC and 14 healthy shoulders) were prospectively assessed. The main measurements were thickness of the joint capsule and synovial membrane in the axillary recess and rotator interval in T1-weighted spin-echo sequence enhanced with intravenous (IV) gadolinium chelate (Gd-chelate). Reliability was studied by use of the intraclass correlation coefficient (ICC). The mean thickness of the axillary recess on the coronal plane was 9.0{+-}2.2 mm in AC shoulders and 0.4{+-}0.7 mm in healthy shoulders. The mean thickness of the rotator interval on the sagittal plane was 8.4{+-}2.8 in AC shoulders and 0.6{+-}0.8 mm in healthy shoulders. Interobserver reliability was good for the axillary recess, with ICC values of 0.84 for the coronal plane, and good for the rotator interval, with ICC values of 0.80 for the sagittal plane. MRI with IV Gd-chelate injection can show, with acceptable reliability, signal and thickness abnormalities of the shoulder joint capsule and synovial membrane in AC. (orig.)

  18. Diffusion measurements for molecular capsules: pulse sequences effect on water signal decay.

    Science.gov (United States)

    Avram, Liat; Cohen, Yoram

    2005-04-20

    Diffusion NMR and, more recently, diffusion ordered spectroscopy (DOSY) are gaining popularity as efficient tools for the characterization of supramolecular systems in solution. Here, using diffusion NMR of hydrogen-bond molecular capsules, we demonstrate that the use of different diffusion sequences may have a dramatic effect on exchanging peaks. In fact, we found that the signal decay of the water peak in [(1a)(6)(H(2)O)(8)] is monoexponential in the pulsed gradient spin-echo (PGSE) and stimulated echo (PGSTE) sequences and biexponential in the longitudinal eddy current delay (LED) and the bipolar longitudinal eddy current delay (BPLED) sequences, routinely used in modern DOSY experiments. By performing these diffusion measurements on molecular capsules, in which water is not part of the molecular capsules, we demonstrate that this phenomenon is observed only for water molecules that exchange between two sites that differ considerably in their diffusion coefficients. Degeneration of the LED or the BPLED sequences into PGSTE-type sequences by shortening the te period resulted in the disappearance of the extra slow diffusing component. The origin, as well as the implications of the different results obtained from conventional diffusion sequences, such as the PGSE and PGSTE as compared with the LED and BPLED sequences generally used in DOSY experiments, are briefly discussed.

  19. Effect of Danshu capsules combined with Xiyanping on acute cholecystitis treatment

    Institute of Scientific and Technical Information of China (English)

    Hong-Liang Wang; Lv-Rong Yuan; Ya-Ming Liu

    2016-01-01

    Objective:To observe the effect of Danshu capsules combined with Xiyanping on acute cholecystitis treatment and offer help to acute cholecystitis treatment.Methods: A total of 180 patients with acute cholecystitis were selected and randomly divided into groups: the observation group (90 people) and the control group (90 people). The patients in the control group were treated with conventional therapy and the patients in the observation group were treated with Danshu capsules combined with Xiyanping on the basis of conventional therapy. Immunological cell, cholecystitis related factors, inflammatory factors, and the coagulation function related factors were detected and analyzed before and after treatment.Results:Coagulation function related factors (PT and APTT), CD8+, cholecystitis related factors (total bilirubin, amylase and PCT), inflammatory factor (hs-CRP, TNF-α, IL-6 and IL-10) in both groups after treatment significantly decreased. PA, immunological cell (CD3+, CD4+ and CD4+/CD8+) significantly increased compared with that before treatment (P0.05). Coagulation function related factors (PT and APTT), CD8+, cholecystitis related factors (total bilirubin, amylase and PCT), and inflammatory factor (hs-CRP, TNF-α, IL-6 and IL-10) in observation group after treatment decreased more significantly than that in control group (P<0.05).Conclusions: Danshu capsules combined with Xiyanping can perfect effectively immunological cell, cholecystitis related factors, inflammatory factors and coagulation function related factors on patients with acute cholecystitis, and it has important clinical significance for acute cholecystitis.

  20. Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

    Directory of Open Access Journals (Sweden)

    Md Rubel Basar

    2014-06-01

    Full Text Available Wireless capsule endoscopy (WCE is a promising technology for direct diagnosis of the entire small bowel to detect lethal diseases, including cancer and obscure gastrointestinal bleeding (OGIB. To improve the quality of diagnosis, some vital specifications of WCE such as image resolution, frame rate and working time need to be improved. Additionally, future multi-functioning robotic capsule endoscopy (RCE units may utilize advanced features such as active system control over capsule motion, drug delivery systems, semi-surgical tools and biopsy. However, the inclusion of the above advanced features demands additional power that make conventional power source methods impractical. In this regards, wireless power transmission (WPT system has received attention among researchers to overcome this problem. Systematic reviews on techniques of using WPT for WCE are limited, especially when involving the recent technological advancements. This paper aims to fill that gap by providing a systematic review with emphasis on the aspects related to the amount of transmitted power, the power transmission efficiency, the system stability and patient safety. It is noted that, thus far the development of WPT system for this WCE application is still in initial stage and there is room for improvements, especially involving system efficiency, stability, and the patient safety aspects.