WorldWideScience

Sample records for forced egg retention

  1. The effects of forced-egg retention on the blood-feeding behavior and reproductive potential of Culex pipiens (Diptera: Culicidae).

    Science.gov (United States)

    Johnson, Brian J; Fonseca, Dina M

    2014-07-01

    High rates of West Nile virus (WNV) transmission to humans are associated with exceptionally hot and dry summers. This is paradoxical since the eggs of Culex vectors of WNV depend on the persistence of containers with water, which decline during droughts. We examined the effects of forced-egg retention on the reproductive success of female Culex pipiens as well as behavioral responses, such as likelihood of secondary blood meals. As controls we examined the effects of female age and delayed mating. We found that early mating is essential to achieve reproductive success and, consistent with an "all-or-none" ovipositing strategy, C. pipiens females are able to retain considerable reproductive potential while searching for oviposition sites. Specifically, although forced-egg retention resulted in significant decreases in fitness, the decline was moderate for 5 weeks and most can be accounted for by increases in female age. Consequently, no females took blood more than once per gonotrophic cycle, which eliminates the possibility that heightened vectorial capacity due to multiple blood-feedings increases WNV transmission during periods of drought. Instead, our findings suggest that during droughts populations of C. pipiens have time to locate the remaining water holes, which are associated with human populations and WNV-competent bird species. Copyright © 2014. Published by Elsevier Ltd.

  2. Morphological characteristics and egg production of forced-moult ...

    African Journals Online (AJOL)

    The forced-moult groups T2 and T3 stopped egg production by 6 days of moult induction and resumed egg production by day 25. T2 and T3 attained a peak egg production of 71% by the second month following resumption of lay. On the other hand, in the T1 egg production progressively decreased with age.

  3. Radiographic and ultrasonographic evaluation of egg retention and peritonitis in two green iguanas (Iguana iguana)

    International Nuclear Information System (INIS)

    Love, N.E.; Douglass, J.P.; Lewbart, G.; Stoskopf, M.

    1996-01-01

    The radiographic technique and radiographic and sonographic findings in two green iguanas with egg retention and peritonitis are described. Neither radiography nor ultrasound provided for identification of free eggs within the coelomic structure secondary to presumed oviduct rupture. Gravidity and coelomic effusion were confirmed by both radiography and ultrasound. Radiography and ultrasound are valuable tools in the diagnosis of egg retention and peritonitis in the green iguana

  4. Modelling retention and dispersion mechanisms of bluefin tuna eggs and larvae in the northwest Mediterranean Sea

    Science.gov (United States)

    Mariani, Patrizio; MacKenzie, Brian R.; Iudicone, Daniele; Bozec, Alexandra

    2010-07-01

    Knowledge of early life history of most fish species in the Mediterranean Sea is sparse and processes affecting their recruitment are poorly understood. This is particularly true for bluefin tuna, Thunnus thynnus, even though this species is one of the world’s most valued fish species. Here we develop, apply and validate an individually based coupled biological-physical oceanographic model of fish early life history in the Mediterranean Sea. We first validate the general structure of the coupled model with a 12-day Lagrangian drift study of anchovy ( Engraulis encrasicolus) larvae in the Catalan Sea. The model reproduced the drift and growth of anchovy larvae as they drifted along the Catalan coast and yielded similar patterns as those observed in the field. We then applied the model to investigate transport and retention processes affecting the spatial distribution of bluefin tuna eggs and larvae during 1999-2003, and we compared modelled distributions with available field data collected in 2001 and 2003. Modelled and field distributions generally coincided and were patchy at mesoscales (10s-100s km); larvae were most abundant in eddies and along frontal zones. We also identified probable locations of spawning bluefin tuna using hydrographic backtracking procedures; these locations were situated in a major salinity frontal zone and coincided with distributions of an electronically tagged bluefin tuna and commercial bluefin tuna fishing vessels. Moreover, we hypothesized that mesoscale processes are responsible for the aggregation and dispersion mechanisms in the area and showed that these processes were significantly correlated to atmospheric forcing processes over the NW Mediterranean Sea. Interannual variations in average summer air temperature can reduce the intensity of ocean mesoscale processes in the Balearic area and thus potentially affect bluefin tuna larvae. These modelling approaches can increase understanding of bluefin tuna recruitment processes and

  5. The effect of resin cements and primer on retentive force of zirconia copings bonded to zirconia abutments with insufficient retention.

    Science.gov (United States)

    Kim, Seung-Mi; Yoon, Ji-Young; Lee, Myung-Hyun; Oh, Nam-Sik

    2013-05-01

    The purpose of this study was to investigate the effect of resin cements and primer on the retentive force of zirconia copings bonded to zirconia abutments with insufficient retention. Zirconia blocks (Lava, 3M ESPE, St. Paul, MN, USA) were obtained and forty sets of zirconia abutments and copings were fabricated using CAD/CAM technology. They were grouped into 4 categories as follows, depending on the types of resin cements used, and whether the primer is applied or not:Panavia F2.0 (P), Panavia F2.0 using Primer (PRIME Plus, Bisco Inc, Schaumburg, IL, USA) (PZ), Superbond C&B (S), and Superbond C&B using Primer (SZ). For each of the groups, the cementation was conducted. The specimens were kept in sterilized water (37℃) for 24 hours. Retentive forces were tested and measured, and a statistical analysis was carried out. The nature of failure was recorded. The means and standard deviations of retentive force in Newton for each group were 265.15 ± 35.04 N (P), 318.21 ± 22.24 N (PZ), 445.13 ± 78.54 N (S) and 508.21 ± 79.48 N (SZ). Superbond C&B groups (S & SZ) showed significantly higher retentive force than Panavia F2.0 groups (P & PZ). In Panavia F2.0 groups, the use of primer was found to contribute to the increase of retentive force. On the other hand, in Superbond C&B groups, the use of primer did not influence the retention forces. Adhesive failure was observed in all groups. This study suggests that cementation of the zirconia abutments and zirconia copings with Superbond C&B have a higher retentive force than Panavia F2.0. When using Panavia F2.0, the use of primer increases the retentive force.

  6. Retention of Escherichia coli, Giardia lamblia cysts and Ascaris lumbricoides eggs in agricultural soils irrigated by untreated wastewater.

    Science.gov (United States)

    Landa-Cansigno, O; Durán-Álvarez, J C; Jiménez-Cisneros, B

    2013-10-15

    In central Mexico, agricultural irrigation reusing Mexico City's municipal wastewater has been occurring for the last century, resulting in the recharge of the local aquifer. However, groundwater of this zone is of good quality, indicating that the microorganisms contained in wastewater are retained by soil after infiltration. This study aims to assess the capacity of three agricultural soils to retain three microorganisms frequently found in wastewater, namely Escherichia coli (E. coli), Giardia lamblia (G. lamblia) cysts and Ascaris lumbricoides (A. lumbricoides) eggs, through batch sorption-desorption assays. The tested soils were: an organic-clayey soil (C-OM), a clayey soil (C-om) and a sandy soil (c-om). For the three soils, sorption equilibrium of E. coli was reached before 1 h, while for G. lamblia cysts and A. lumbricoides eggs, sorption equilibrium took 2.5 h. Sorption of E. coli was better described by the Freundlich model than by the Langmuir one. Higher retention of bacteria was observed in the C-om soil (KF = 4340) than in the C-OM and c-om ones (KF = 1821 and 0.01, respectively). Regarding G. lamblia cysts and A. lumbricoides eggs, data could not be fitted to the tested sorption models. For both organisms, retention was lower in the C-OM soil than in the C-om and c-om ones. In the desorption tests, a sudden liberation of E. coli from soils was observed, probably due to bacterial re-growth. Desorption of G. lamblia was higher in the sandy soil than in the clayey ones; desorption was not increased when a surfactant was applied to the soil, suggesting that hydrophobic interactions are not necessarily responsible for retention of the cysts onto the tested soils. For A. lumbricoides eggs, desorption using NaOCl solution suggested that retention was caused by interactions between the mineral fraction of the soil and the external walls of eggs. This study showed that the three target microorganisms are retained by the tested soils and that

  7. Attachment systems for implant overdenture: influence of implant inclination on retentive and lateral forces.

    Science.gov (United States)

    Yang, Tsung-Chieh; Maeda, Yoshinobu; Gonda, Tomoya; Kotecha, Sunny

    2011-11-01

    To evaluate the retentive force and lateral force of an implant with various types of attachments for overdentures in relation to implant inclination. An implant (3.75 × 13 mm) was embedded into an acrylic resin block, simulating the edentulous ridge. Four different attachment systems were used, including: (1) Locator black and blue, (2) a ball attachment, (3) a flat-type magnetic attachment and (4) a self-adjusting magnetic attachment, which has vertical and rotational movement. All of the attachments were under a constant dislodging force with an angle of the implant at 0°, 15°, 30° and 45°, and the experiments were repeated 10 times using a universal testing machine to measure the retentive force. The lateral force to the implant was measured by strain gauges attached on the implant surface. Statistical analysis was performed by multiple comparisons with Bonferroni's correction. Pattachments. The Locator blue and ball attachment maintained the retentive force until a 30° inclination; however, the lateral force increased significantly, especially with the ball attachment. The retentive force of the magnetic attachment was significantly lower at 0°, as well as the lateral force in the self-adjusting magnetic attachment. Within the limitations of this study, we conclude that the retentive force decreases with an increase in implant inclination, whereas the lateral force increases, except for in magnetic attachments. © 2011 John Wiley & Sons A/S.

  8. Scrambled eggs: mechanical forces as ecological factors in early development.

    Science.gov (United States)

    Moore, Steven W

    2003-01-01

    Many ecological interactions involve, at some level, mechanical forces and the movements or structural deformations they produce. Although the most familiar examples involve the functional morphology of adult structures, all life history stages (not just the adults) are subject to the laws of physics. Moreover, the success of every lineage depends on the success of every life history stage (again, not just the adults). Therefore, insights gained by using mechanical engineering principles and techniques to study ecological interactions between gametes, embryos, larvae, and their environment are essential to a well-rounded understanding of development, ecology, and evolution. Here I draw on examples from the literature and my own research to illustrate ways in which mechanical forces in the environment shape development. These include mechanical forces acting as selective factors (e.g., when coral gamete size and shape interact with turbulent water flow to determine fertilization success) and as developmental cues (e.g., when plant growth responds to gravity or bone growth responds to mechanical loading). I also examine the opposite cause-and-effect relationship by considering examples in which the development of organisms impacts ecologically relevant mechanical forces. Finally, I discuss the potential for ecological pattern formation as a result of feedback loops created by such bidirectional interactions between developmental processes and mechanical forces in the environment.

  9. Investigation of retentive force reduction and wear of the locator attachment system with different implant angulations.

    Science.gov (United States)

    Rabbani, Saleha; Juszczyk, Andrzej S; Clark, Robert Kf; Radford, David R

    2015-01-01

    To evaluate the effect of cyclic disengagement on the retentive force and wear patterns of pairs of three Locator inserts (blue, pink, and clear) in vitro. Implant analogs (Astra Tech) were positioned into aluminum blocks parallel to each other and perpendicular to the horizontal plane, with one analog angulated mesially by 10 degrees (0/10), or with two implant analogs each angulated mesially by 5 degrees (5/5). Ninety Locator attachments, in 15 pairs of each standard retention strength (blue, pink, and clear), underwent 2,500 cycles of testing, lubricated with artificial saliva. Data were analyzed after 6, 12, and 18 months of simulated clinical use (720, 1,440, or 2,160 cycles). The wear patterns of the Locator inserts were examined before and after the cyclic dislodgments using scanning electron microscopy. There were significant differences in retentive force between clear, blue, and pink inserts at baseline, with the clear insert being the most retentive in the 0/10 model. The lowest percentage reduction in retentive force from baseline to 2,160 cycles was the pink insert in the 0/10 model, and the highest was the blue insert in the 5/5 angled model. A rapid decrease in retentive force was observed in all three models after 720 cycles for all three inserts. The most retentive combination was the clear insert in the 0/10 model, and the least retentive was the blue insert in the 0/10 model. After 2,160 cycles, there was a significant reduction in retentive force of 59% to 70%. However, the values of retention were still higher than those claimed by the manufacturer.

  10. Foreign egg retention by avian hosts in repeated brood parasitism : Why do rejecters accept?

    NARCIS (Netherlands)

    Moskat, Csaba; Hauber, Mark E.; Elek, Zoltan; Gommers, Moniek; Ban, Miklos; Groenewoud, Frank; Versluijs, Tom S. L.; Hoetz, Christiaan W. A.; Komdeur, Jan

    Great reed warblers (Acrocephalus arundinaceus) are frequently parasitized by egg-mimetic common cuckoos (Cuculus canorus) in Hungary, and these hosts reject about a third of parasitic eggs. The timing of parasitism is important, in that the probability of rejection decreases with advancing breeding

  11. Retention of carotenoids in egg yolks of laying hens supplemented with heterotrophic Chlorella

    Czech Academy of Sciences Publication Activity Database

    Kotrbáček, V.; Skřivan, M.; Kopecký, Jiří; Pěnkava, O.; Hudečková, P.; Uhríková, I.; Doubek, J.

    2013-01-01

    Roč. 58, č. 5 (2013), s. 193-200 ISSN 1212-1819 Institutional support: RVO:61388971 Keywords : lutein * zeaxanthin * enriched eggs Subject RIV: EE - Microbiology, Virology Impact factor: 0.871, year: 2013

  12. Correlation between retention force of experimental plates and viscosity of experimental fluids

    Directory of Open Access Journals (Sweden)

    Mladenović Dragan

    2011-01-01

    Full Text Available Introduction. Saliva viscosity plays a significant role in the biophysical segment of the total retention potential of total dentures. Objective. The aim of the paper was to establish the dependence of dynamic retention force of experimental plates on experimental fluid viscosity and especially time dependence of these parameters, following at the same time relative changes of the distance between the experimental plate and dentures support established by the dislocation of the experimental plate in both directions. Methods. For experimental verification we used an original device with the aim to enable in vivo simulation on the phantom made of the upper total denture prosthesis support and experimental plate. The experiment consisted of two parts. In the first part we determined the value of the dynamic retention force with plates without and with achieved ventilation effect. In the second part we determined time dependence of the dynamic retention force of experimental plates on the viscosity of experimental fluids that had been priorly determined on identical samples (8 ml of experimental fluid samples using a rotational viscometer (Haake RV-12 with a sensor (MV, Germany. Results Under the conditions of variable viscosity rates of seven experimental fluids (from 0.02 to 1309.04 mPa•s, we registered the time dependence of dynamic retention force of the experimental plate related to fluid viscosity during the action of the continual dislocating force of the separating directions. In addition, the maximal height of the dislocation of the experimental plate was registered. The dynamic retention force, manifested by the separating direction of the experimental plate dislocation, was increased concurrently with increased viscosity. Conclusion. The increase of dynamic retention force depends directly on medium viscosity. Close border values of fluid viscosity above the investigated ones, the impossibility of experimental layer thinning and the

  13. Shear force bond analysis between acrylic resin bases and retention framework (open- and mesh-type)

    Science.gov (United States)

    Royhan, A.; Indrasari, M.; Masulili, C.

    2017-08-01

    Occlusions between teeth and the activity of the muscles around an artificial tooth during mastication create a force on dentures. This force causes friction between acrylic resin bases and retention frameworks that can lead to the complete loss of the acrylic resin base from the framework. The purpose of this study was to analyze the design of retention frameworks and determine which ones have a better resistance to shear forces in order to prevent the loss of heat cured acrylic resin base (HCARB). Six samples each of open-and mesh-type retention frameworks, both types made of Co-Cr material, and HCARB, were shear tested by means of a universal testing machine. The average shear force required to release the HCARB for mesh-type retention frameworks was 28.84 kgf, and the average for the open-type was 26.52 kgf. There was no significant difference between the shear forces required to remove HCARB from open- and mesh-type retention frameworks.

  14. Changing Demographics and the Impact on Air Force Officer Retention

    National Research Council Canada - National Science Library

    Armstrong, Brenda

    2000-01-01

    ... for a work/life balance among both military members and their civilian counterparts. As the labor shortage for professional skills continues, the Air Force must look for innovative ways to retain its officers...

  15. Glucocorticoids facilitate the retention of acquired immobility during forced swimming

    NARCIS (Netherlands)

    Veldhuis, H D; De Korte, C C; De Kloet, E R

    1985-01-01

    The adrenalectomy-induced decrease in the level of immobility during a 5 min retest period in the Porsolt swimming test could be reversed by glucocorticoids administered s.c. 15 min after the initial forced swimming exposure. The synthetic glucocorticoids dexamethasone and RU 28362 were active in

  16. Review of Attrition and Retention Research for the Canadian Forces

    Science.gov (United States)

    2008-10-01

    recherches ont été faites en ce qui concerne les Forces canadiennes (FC), sur le maintien de l’effectif. Ce document représente un examen de ces recherches...Les auteurs commencent par placer la recherche en contexte en résumant les réalisations faites jusqu’ici en termes d’activités, d’outils, de...recherches, les auteurs explorent les orientations éventuelles des stratégies de maintien de l’effectif en passant en revue les recommandations

  17. Influence of thickness and undercut of thermoplastic resin clasps on retentive force.

    Science.gov (United States)

    Osada, Hidekazu; Shimpo, Hidemasa; Hayakawa, Tohru; Ohkubo, Chikahiro

    2013-01-01

    Thermoplastic resin clasps have been used for esthetic denture rehabilitation. However, details of the design of the clasps have never been thoroughly clarified. This study investigated the retentive forces of thermoplastic resin clasps for non-metal clasp dentures. The retentive forces of all thermoplastic resin clasps depended on the elastic modulus of each resin, undercuts, thickness, and widths of the tested. A clasp with more than 0.5 mm undercut and 1.0 mm thickness is needed for Valplast. Similarly, more than 0.25 mm undercut and 1.0 mm thickness and 0.5 mm undercut and 0.5 mm thickness are required for Estheshot and Reigning, respectively; thus, the recommended clasp arm thickness is 1.0 mm to 1.5 mm for Valplast and Estheshot and 0.5 mm to 1.0 mm for Reigning when the width of the retentive arm is 5.0 mm.

  18. Talent Retention of the Air Force Officer Corps A Leader’s Role

    Science.gov (United States)

    2016-02-16

    and an Aerial Port duty officer. He is currently a student at the Air War College , Maxwell Air Force Base, Alabama. iv Abstract Air...AIR WAR COLLEGE AIR UNIVERSITY TALENT RETENTION OF THE AIR FORCE OFFICER CORPS A LEADER’S ROLE by Andrew H. Pate, Lieutenant...skills. Take for example child prodigy Wolfgang Mozart who learned to play the piano at age four, began composing music at five, and wrote his

  19. Selection for career course and impact on retention of Brazilian Air Force officers

    OpenAIRE

    De Mello Takahashi, Marcus Vinicius

    2015-01-01

    Approved for public release; distribution is unlimited This research examines the effect of a particular non-monetary incentive on the retention of active duty Brazilian Air Force colonels. The objective is to provide evidence to support the Brazilian Air Force Manpower decision makers in establishing policies regarding the selection of colonels for a career course. The characteristics of the incentives and the links to Expectancy Theory were reviewed to frame the hypotheses. Using two sou...

  20. Bioavailability of lutein in corn distillers dried grains with solubles relative to lutein in corn gluten meal based on lutein retention in egg yolk.

    Science.gov (United States)

    Shin, Hye Seong; Kim, Jong Woong; Lee, Dong Gu; Lee, Sanghyun; Kil, Dong Yong

    2016-08-01

    Dietary lutein and its food sources have gained great attention due to its health-promoting effects on humans, especially for certain eye diseases. However, relative bioavailability (RBV) of lutein among lutein-rich feed ingredients that lead to lutein-enriched egg production has not been determined. Thus, the RBV of lutein in corn distillers dried grains with solubles (DDGS) as compared to lutein in corn gluten meal (CGM) was evaluated based on lutein retention in egg yolk. Increasing inclusion levels of DDGS or CGM in diets increased (linear, P lutein concentrations of egg yolk without affecting laying performance. Multiple regression analysis revealed that the bioavailability of lutein in DDGS was less (P lutein in CGM, with the RBV of lutein in DDGS being 61.6% when the bioavailability of lutein in CGM was assumed to be 100% for lutein retention in egg yolk. The results of the present experiment indicate that the DDGS can be a potential ingredient for laying hens to improve egg yolk colour and lutein concentrations of egg yolk although lutein in DDGS is less bioavailable than lutein in CGM. © 2015 Society of Chemical Industry. © 2015 Society of Chemical Industry.

  1. Retention and egg production of Microphallus pygmaeus in mice: the influence of the adrenal cortex.

    Science.gov (United States)

    Ahmad, R A; James, B L; Kamis, A B

    1986-01-01

    Fewer adult Microphallus pygmaeus are recovered from the small intestine of adrenalectomized male mice than from sham-operated counterparts. Preinfection intraperitoneal injection of 2 IU or 4 IU ACTH daily for 7 days increases the initial primary worm burden in male mice. Preinfection intramuscular injection of 325 micrograms corticosterone daily for 7 days increases the initial worm burden and alters the subsequent rate of decline and duration of the primary infection. However, egg production is unaffected. The changes in parasite numbers are attributed to the immunosuppressive action of corticosterone.

  2. Altitudinal variation in egg retention and rates of embryonic development in oviparous Zootoca vivipara fits predictions from the cold-climate model on the evolution of viviparity.

    Science.gov (United States)

    Rodríguez-Díaz, T; Braña, F

    2012-09-01

    The evolution of reptilian viviparity is favoured, according to the cold-climate hypothesis, at high latitudes or altitudes, where egg retention would entail thermal benefits for embryogenesis because of maternal thermoregulation. According to this hypothesis, and considering that viviparity would have evolved through a gradual increase in the extent of intrauterine egg retention, highland oviparous populations are expected to exhibit more advanced embryo development at oviposition than lowland populations. We tested for possible differences in the level of egg retention, embryo development time and thermal biology of oviparous Zootoca vivipara near the extreme altitudinal limits of the species distribution in the north of Spain (mean altitude for lowland populations, 235 m asl.; for highland populations, 1895 m asl.). Altitude influenced neither temperature of active lizards in the field nor temperature selected by lizards in a laboratory thermal gradient, and pregnant females selected lower temperatures in the thermal gradient than did males and nonpregnant females across altitudinal levels. Eggs from highland populations contained embryos more developed at the time of oviposition (Dufaure and Hubert's stages 33-35) than eggs of highland populations (stages 30-34) and partly because of this difference incubation time was shorter for highland embryos. When analysed for clutches from both altitudinal extremes at the same embryonic stage at oviposition (stage 33), again incubation time was shorter for highland populations, indicating genuine countergradient variation in developmental rate. Our results indicate that temperature is an environmental factor affecting the geographical distribution of different levels of egg retention in Z. vivipara, as predicted by the cold-climate hypothesis on the evolution of viviparity. © 2012 The Authors. Journal of Evolutionary Biology © 2012 European Society For Evolutionary Biology.

  3. Alzheimer's disease therapeutic trials: EU/US Task Force report on recruitment, retention, and methodology.

    Science.gov (United States)

    Vellas, B; Hampel, H; Rougé-Bugat, M E; Grundman, M; Andrieu, S; Abu-Shakra, S; Bateman, R; Berman, R; Black, R; Carrillo, M; Donohue, M; Mintun, M; Morris, J; Petersen, R; Thomas, R G; Suhy, J; Schneider, L; Seely, L; Tariot, P; Touchon, J; Weiner, M; Sampaio, C; Aisen, P

    2012-04-01

    While we may not be able to find a cure for Alzheimer's disease (AD) in the near future, several drugs presently in trials have shown promise as possible modifiers of disease progression. However, we may not be able to demonstrate efficacy due to issues of recruitment, retention, site-to-site variability, and other methodological issues. It is thus incumbent on the scientific community to find solutions to these problems, particularly as the field moves toward preventing illness or treating the disease in its prodromal stages, where these methodological issues will become even more critical. We need to better understand why participants agree or refuse to enter drug trials, and why both primary care physicians and Alzheimer's specialists agree or refuse to involve their patients. We also need to quantify the impact of requiring imaging studies, extensive questionnaires, cognitive testing, and lumbar punctures on recruitment and retention. With these concerns in mind, an international task force meeting of experts from academia and industry in the United States, European Union, and Japan in San Diego, California on November 2, 2011 to focus on recruitment, retention and other methodological issues related to clinical trials for AD. Based on the recommendations of this Task force meeting, this Perspectives article critically reflects on the most critical and timely methodological issues related to recruitment and retention in prevention and therapeutic trials in AD, which are paralleled by a paradigm shift in the diagnostic conceptualization of this disease, as reflected by recently new proposed diagnostic criteria involving preclinical stages of the disease.

  4. Modelling retention and dispersion mechanisms of bluefin tuna eggs and larvae in the Northwest Mediterranean Sea

    DEFF Research Database (Denmark)

    Mariani, Patrizio; MacKenzie, Brian; Iudicone, D.

    2010-01-01

    locations of spawning bluefin tuna using hydrographic backtracking procedures; these locations were situated in a major salinity frontal zone and coincided with distributions of an electronically tagged bluefin tuna and commercial bluefin tuna fishing vessels. Moreover, we hypothesized that mesoscale...... processes are responsible for the aggregation and dispersion mechanisms in the area and showed that these processes were significantly correlated to atmospheric forcing processes over the NW Mediterranean Sea. Interannual variations in average summer air temperature can reduce the intensity of ocean...

  5. In vitro retention force measurement for three different attachment systems for implant-retained overdenture

    OpenAIRE

    Reda, Kareem Mohammed; El-Torky, Ibrahim Ramadan; EL-Gendy, Mohamed Nabeel

    2016-01-01

    Aim: The aim of this study is to compare the retention force of three different types of overdenture attachment systems used in implant-retained mandibular complete overdentures. Materials and Methods: Twenty-one similar acrylic resin blocks were prepared and divided into three study groups: Group A (snap attachment) - 10 specimens, Group B (locator attachment) - 1 specimen, and Group C (syncone attachment) - 10 specimens. A single rectangular heat cure acrylic resin block with two implant...

  6. Changes in retention force with electroplated copings on conical crowns: a comparison of gold and zirconia primary crowns.

    Science.gov (United States)

    Bayer, Stefan; Kraus, Dominik; Keilig, Ludger; Gölz, Lina; Stark, Helmut; Enkling, Norbert

    2012-01-01

    The aim of this study was to examine the wear behavior of conical crowns with electroplated gold copings that are used to connect implants and teeth to a removable denture. Gold alloy and zirconium dioxide ceramic crowns were compared. Fifteen crowns each were milled for two groups: gold alloy and zirconium dioxide. Each specimen had a 2-degree taper. The electroplated coping was established by direct electroforming. The retentive forces and the correlating distance during insertion and separation were measured after 10,000 wear cycles were applied. The wear testing was separated into a start phase, an initial wear phase, and the long-term wear period. The retention force value and the force-distance integral of the first 0.3 mm of each cycle were calculated. The changes in retention force and integral did not differ significantly between both groups in the start and the initial wear phase. No differences were seen in force development during the long-term wear period. Only the force-distance integral showed a significant difference: the median values of the gold crowns increased slightly, and they decreased slightly for the zirconia crowns. The median force values never fell below 6 N for gold and 4 N for zirconia. Within the limitations of this study, the tested conical crowns showed clinically acceptable retentive properties. As with other retentive elements for dentures, the specimens tested showed the greatest amount of change in retentive forces during the first 2,000 cycles. The development of retention force in both groups was not significantly different. However, the zirconia specimens showed reduced variability, which is preferable in clinical practice.

  7. Tensile test and interface retention forces between wires and composites in lingual fixed retainers.

    Science.gov (United States)

    Paolone, Maria Giacinta; Kaitsas, Roberto; Obach, Patricia; Kaitsas, Vasilios; Benedicenti, Stefano; Sorrenti, Eugenio; Barberi, Fabrizio

    2015-06-01

    In daily orthodontic clinical practice retention is very important, and lingual retainers are part of this challenge. The failure of lingual retainers may be due to many factors. The aim of this study was to assess the retention forces and mechanical behavior of different types of wires matched with different kinds of composites in lingual retainers. A tensile test was performed on cylindrical composite test specimens bonded to orthodontic wires. The specimens were constructed using four different wires: a straight wire (Remanium .016×.022″ Dentaurum), two round twisted wires (Penta One .0215″ Masel, Gold Penta Twisted .0215″ Gold N'braces) and a rectangular braided wire (D-Rect .016×.022″ Ormco); and three composites: two micro-hybrids (Micro-Hybrid Enamel Plus HFO Micerium, and Micro-Hybrid SDR U Dentsply) and a micro-nano-filled composite (Micro-Nano-Filled Transbond LR 3M). The test was performed at a speed of 10mm/min on an Inström device. The wire was fixed with a clamp. The results showed that the bonding between wires and composites in lingual fixed retainers seemed to be lowest for rectangular smooth wires and increased in round twisted and rectangular twisted wires where the bonding was so strong that the maximum tension/bond strength was greater than the ultimate tensile strength of the wire. The highest values were in rectangular twisted wires. Concerning the composites, hybrid composites had the lowest interface bonding values and broke very quickly, while the nano- and micro-composites tolerated stronger forces and displayed higher bonding values. The best results were observed with the golden twisted wire and reached 21.46 MPa with the Transbond composite. With the rectangular braided wire the retention forces were so high that the Enamel Plus composite fractured when the load exceeded 154.6 N/MPa. When the same wire was combined with the Transbond LR either the wire or the composite broke when the force exceeded 240 N. The results of this

  8. Effects of implant angulations and attachment configurations on the retentive forces of locator attachment-retained overdentures.

    Science.gov (United States)

    Uludag, Bulent; Polat, Serdar; Sahin, Volkan; Çomut, Ali Alper

    2014-01-01

    The aim of this study was to evaluate the effects of different implant angulations and attachment configurations on the retentive forces of locator attachment-retained overdentures over a simulated time period of 6 months. Two acrylic resin models (models 1 and 2) were fabricated to represent an edentulous mandible. In model 1, the midline implant (in the central region) was vertical and the other two implants (in the canine regions) were 20 degrees divergent from the midline, reaching a total divergence of 40 degrees. In model 2, all three implants were vertically oriented, perpendicular to the occlusal plane and parallel to each other. Three-point vertical pull-out forces were employed in a universal testing machine at a constant crosshead speed of 50 mm/min after overdenture construction and a simulation of 6 months of repeated insertions/removals of the overdenture. Locator attachments with different male combinations and bar and clip attachments were tested in model 1. Clear locator attachments and bar and clip attachments were tested in model 2 and served as controls. The initial retentive forces of all attachments in both models ranged from 26.58 to 62.05 N, whereas the initial retentive forces of the attachments for only model 1 ranged from 49.58 to 62.05 N. The highest retention value was recorded for clear green locator attachments and the lowest for hader bar yellow clip attachments. Locator attachments showed higher retention values than hader bar yellow clip attachments. All attachment systems demonstrated a decrease in retention over time. Locator attachments provided better retention than hader bar yellow clip attachments. The highest retention values were obtained when green male locators were used in combination with male attachments.

  9. Effects of Embodied Learning and Digital Platform on the Retention of Physics Content: Centripetal Force

    Science.gov (United States)

    Johnson-Glenberg, Mina C.; Megowan-Romanowicz, Colleen; Birchfield, David A.; Savio-Ramos, Caroline

    2016-01-01

    Embodiment theory proposes that knowledge is grounded in sensorimotor systems, and that learning can be facilitated to the extent that lessons can be mapped to these systems. This study with 109 college-age participants addresses two overarching questions: (a) how are immediate and delayed learning gains affected by the degree to which a lesson is embodied, and (b) how do the affordances of three different educational platforms affect immediate and delayed learning? Six 50 min-long lessons on centripetal force were created. The first factor was the degree of embodiment with two levels: (1) low and (2) high. The second factor was platform with three levels: (1) a large scale “mixed reality” immersive environment containing both digital and hands-on components called SMALLab, (2) an interactive whiteboard system, and (3) a mouse-driven desktop computer. Pre-tests, post-tests, and 1-week follow-up (retention or delayed learning gains) tests were administered resulting in a 2 × 3 × 3 design. Two knowledge subtests were analyzed, one that relied on more declarative knowledge and one that relied on more generative knowledge, e.g., hand-drawing vectors. Regardless of condition, participants made significant immediate learning gains from pre-test to post-test. There were no significant main effects or interactions due to platform or embodiment on immediate learning. However, from post-test to follow-up the level of embodiment interacted significantly with time, such that participants in the high embodiment conditions performed better on the subtest devoted to generative knowledge questions. We posit that better retention of certain types of knowledge can be seen over time when more embodiment is present during the encoding phase. This sort of retention may not appear on more traditional factual/declarative tests. Educational technology designers should consider using more sensorimotor feedback and gestural congruency when designing and opportunities for instructor

  10. Effects of embodied learning and digital platform on the retention of physics content: Centripetal force

    Directory of Open Access Journals (Sweden)

    Mina Johnson-Glenerg

    2016-11-01

    Full Text Available Embodiment theory proposes that knowledge is grounded in sensorimotor systems, and that learning can be facilitated to the extent that lessons can be mapped to these systems. This study with 109 college-age participants addresses two overarching questions: a how are immediate and delayed learning gains affected by the degree to which a lesson is embodied, and b how do the affordances of three different educational platforms affect immediate and delayed learning? Six 50 minute-long lessons on centripetal force were created. The first factor was the degree of embodiment with two levels: 1 low and 2 high. The second factor was platform with three levels: 1 a large scale mixed reality immersive environment containing both digital and hands-on components called SMALLab, 2 an interactive whiteboard system, and 3 a mouse-driven desktop computer. Pretests, posttests, and one-week followup (retention or delayed learning gains tests were administered resulting in a 2 x 3 x 3 design. Two knowledge subtests were analyzed, one that relied on more declarative knowledge and one that relied on more generative knowledge, e.g., hand-drawing vectors. Regardless of condition, participants made significant immediate learning gains from pretest to posttest. There were no significant main effects or interactions due to platform or embodiment on immediate learning. However, from posttest to followup the level of embodiment interacted significantly with time, such that participants in the high embodiment conditions performed better on the subtest devoted to generative knowledge questions. We posit that better retention of certain types of knowledge can be seen over time when more embodiment is present during the encoding phase. This sort of retention may not appear on more traditional factual/declarative tests. Educational technology designers should consider using more sensorimotor feedback and gestural congruency when designing and opportunities for instructor

  11. Effects of Embodied Learning and Digital Platform on the Retention of Physics Content: Centripetal Force.

    Science.gov (United States)

    Johnson-Glenberg, Mina C; Megowan-Romanowicz, Colleen; Birchfield, David A; Savio-Ramos, Caroline

    2016-01-01

    Embodiment theory proposes that knowledge is grounded in sensorimotor systems, and that learning can be facilitated to the extent that lessons can be mapped to these systems. This study with 109 college-age participants addresses two overarching questions: (a) how are immediate and delayed learning gains affected by the degree to which a lesson is embodied, and (b) how do the affordances of three different educational platforms affect immediate and delayed learning? Six 50 min-long lessons on centripetal force were created. The first factor was the degree of embodiment with two levels: (1) low and (2) high. The second factor was platform with three levels: (1) a large scale "mixed reality" immersive environment containing both digital and hands-on components called SMALLab , (2) an interactive whiteboard system, and (3) a mouse-driven desktop computer. Pre-tests, post-tests, and 1-week follow-up (retention or delayed learning gains) tests were administered resulting in a 2 × 3 × 3 design. Two knowledge subtests were analyzed, one that relied on more declarative knowledge and one that relied on more generative knowledge, e.g., hand-drawing vectors. Regardless of condition, participants made significant immediate learning gains from pre-test to post-test. There were no significant main effects or interactions due to platform or embodiment on immediate learning. However, from post-test to follow-up the level of embodiment interacted significantly with time, such that participants in the high embodiment conditions performed better on the subtest devoted to generative knowledge questions. We posit that better retention of certain types of knowledge can be seen over time when more embodiment is present during the encoding phase. This sort of retention may not appear on more traditional factual/declarative tests. Educational technology designers should consider using more sensorimotor feedback and gestural congruency when designing and opportunities for instructor

  12. Fertilization of sea urchin eggs and sperm motility are negatively impacted under low hypergravitational forces significant to space flight

    Science.gov (United States)

    Tash, J. S.; Kim, S.; Schuber, M.; Seibt, D.; Kinsey, W. H.

    2001-01-01

    Sperm and other flagellates swim faster in microgravity (microG) than in 1 G, raising the question of whether fertilization is altered under conditions of space travel. Such alterations have implications for reproduction of plant and animal food and for long-term space habitation by man. We previously demonstrated that microG accelerates protein phosphorylation during initiation of sperm motility but delays the sperm response to the egg chemotactic factor, speract. Thus sperm are sensitive to changes in gravitational force. New experiments using the NiZeMi centrifugal microscope examined whether low hypergravity (hyperG) causes effects opposite to microG on sperm motility, signal transduction, and fertilization. Sperm % motility and straight-line velocity were significantly inhibited by as little as 1.3 G. The phosphorylation states of FP130, an axonemal phosphoprotein, and FP160, a cAMP-dependent salt-extractable flagellar protein, both coupled to motility activation, showed a more rapid decline in hyperG. Most critically, hyperG caused an approximately 50% reduction in both the rate of sperm-egg binding and fertilization. The similar extent of inhibition of both fertilization parameters in hyperG suggests that the primary effect is on sperm rather than eggs. These results not only support our earlier microG data demonstrating that sperm are sensitive to small changes in gravitational forces but more importantly now show that this sensitivity affects the ability of sperm to fertilize eggs. Thus, more detailed studies on the impact of space flight on development should include studies of sperm function and fertilization.

  13. In vitro retention force measurement for three different attachment systems for implant-retained overdenture

    Directory of Open Access Journals (Sweden)

    Kareem Mohammed Reda

    2016-01-01

    Conclusion: Regardless of the initial retention level of overdenture attachment, gradual loss of retention values is inevitable. However, the rate of retention loss in overdenture attachments is higher in types which comprised plastic parts within their components, rather than those totally made up of noble metals.

  14. Retention Forces between Titanium and Zirconia Components of Two-Part Implant Abutments with Different Techniques of Surface Modification.

    Science.gov (United States)

    von Maltzahn, Nadine Freifrau; Holstermann, Jan; Kohorst, Philipp

    2016-08-01

    The adhesive connection between titanium base and zirconia coping of two-part abutments may be responsible for the failure rate. A high mechanical stability between both components is essential for the long-term success. The aim of the present in-vitro study was to evaluate the influence of different surface modification techniques and resin-based luting agents on the retention forces between titanium and zirconia components in two-part implant abutments. A total of 120 abutments with a titanium base bonded to a zirconia coping were investigated. Two different resin-based luting agents (Panavia F 2.0 and RelyX Unicem) and six different surface modifications were used to fix these components, resulting in 12 test groups (n = 10). The surface of the test specimens was mechanically pretreated with aluminium oxide blasting in combination with application of two surface activating primers (Alloy Primer, Clearfil Ceramic Primer) or a tribological conditioning (Rocatec), respectively. All specimens underwent 10,000 thermal cycles between 5°C and 55°C in a moist environment. A pull-off test was then conducted to determine retention forces between the titanium and zirconia components, and statistical analysis was performed (two-way anova). Finally, fracture surfaces were analyzed by light and scanning electron microscopy. No significant differences were found between Panavia F 2.0 and RelyX Unicem. However, the retention forces were significantly influenced by the surface modification technique used (p zirconia copings were pretreated with aluminium oxide blasting, and with the application of Clearfil Ceramic Primer. Surface modification techniques crucially influence the retention forces between titanium and zirconia components in two-part implant abutments. All adhesion surfaces should be pretreated by sandblasting. Moreover, a phosphate-based primer serves to enhance long-term retention of the components. © 2015 Wiley Periodicals, Inc.

  15. Fitness and retentive force of cobalt-chromium alloy clasps fabricated with repeated laser sintering and milling.

    Science.gov (United States)

    Torii, Mana; Nakata, Toyoki; Takahashi, Kazuya; Kawamura, Noboru; Shimpo, Hidemasa; Ohkubo, Chikahiro

    2018-02-07

    With computer-aided design and computer-aided manufacturing (CAD/CAM), the study was conducted to create a removable partial denture (RPD) framework using repeated laser sintering rather than milling and casting techniques. This study experimentally evaluated the CAM clasp and compared it to a conventional cast clasp. After the tooth die was scanned, an Akers clasp was designed using CAD with and without 50μm of digital relief on the occlusal surface of the tooth die. Cobalt-chromium (Co-Cr) alloy clasps were fabricated using repeated laser sintering (RLS) and milling as one process simultaneously (hybrid manufacturing; HM). The surface roughness of the rest region, gap distances between clasp and tooth die, initial retentive forces, and changes of retentive forces up to 10,000 insertion/removal cycles were measured before and after heat treatment. The HM clasp was compared to the cast clasp and the clasp made by repeated laser sintering only without a milling process. The HM clasp surface was smoother than those of cast and RLS clasps. With the digital relief, the fitness accuracy of the HM clasp improved. The retentive forces of the HM clasps with relief and after heat treatment were significantly greater than for the cast clasp. HM clasps demonstrated a constant or slight decrease of retention up to 10,000 cycles. HM clasp exhibited better fitness accuracy and retentive forces. The possibility of clinically using HM clasps as well as conventional cast clasps can be suggested. Copyright © 2018 Japan Prosthodontic Society. Published by Elsevier Ltd. All rights reserved.

  16. Attachment systems for mandibular single-implant overdentures: an in vitro retention force investigation on different designs.

    Science.gov (United States)

    Alsabeeha, Nabeel; Atieh, Momen; Swain, Michael V; Payne, Alan G T

    2010-01-01

    The aim of this study was to investigate the retentive force of six different attachment systems used for mandibular single-implant overdentures, including two prototype large ball attachment designs. Two prototype ball attachments of larger dimensions (7.9 and 5.9 mm) and four commercially available ball and stud attachments of standard dimensions (2.25 and 4.0 mm) were evaluated on three identical test casts resembling an edentulous mandible with severe residual ridge resorption. Five samples from each attachment system (n=30) were connected to three different implants (8.0-mm wide diameter, 3.75-mm regular diameter, and 4.0-mm regular diameter). An Instron testing machine with a computer software package was used to deliver a vertical dislodging force at a cross-head speed of 50 mm/min to each overdenture sample from the anterior direction. A total of 300 pull tests were conducted (50 per attachment system). The maximum load (retentive force) required to separate each overdenture from the supporting implant was then measured. The highest retentive force (36.97+/-2.23 N) was achieved with the 7.9-mm prototype ball attachment design, followed in a decreasing order by the 5.9-mm prototype ball attachment design (32.06+/-2.59 N), the standard 2.25-mm ball attachment (17.32+/-3.68 N), Locator white (12.39+/-0.55 N), Locator pink (9.40 N+/-0.74 N), and Locator blue (3.83+/-0.64 N). A statistically significant difference (Pattachments. Attachment systems of larger dimensions provided higher retentive forces for mandibular single-implant overdentures. Further in vitro and in vivo research is necessary to determine prosthodontic outcomes with these attachments in edentulous patients prior to their routine clinical use internationally.

  17. Retention force of secondary crowns to copings after temporary cementation: the effect of crown material and luting agent.

    Science.gov (United States)

    Mundt, Torsten; Heinemann, Friedhelm; Golecki, Gudrun; Schwahn, Christian; Biffar, Reiner

    2010-12-01

    Tooth-implant supported restorations can be temporarily cemented if the natural abutments are protected by permanently cemented copings. This in vitro study investigated the retention forces of pure titanium crowns to milled titanium alloy copings and of cobalt-chromium crowns to copings made of electroplated gold after cementation with different luting agents. Five specimens per group were cemented with acrylic-urethane cement (inner crown surface preisolated with petroleum jelly) and provisional zinc oxide cement. The retention was measured using a universal testing machine and a dental device for crown removal. The differences between groups were compared using analysis of variance. The pull-off forces for the cobalt-chromium secondary crowns cemented on gold copings using zinc oxide cement were significantly higher (mean=144.5 N) than the other crown-cement combinations (32.2-54.4 N), which showed no significant differences in the retention force. The impulse number and magnitude of the dental device was usually low and showed no substantial differences between the crown-cement combinations. It can be concluded that the results of the clinical removal method for prostheses differ from the results of the pull-off test. The question which luting agent is the better choice for retrievable restorations remains unanswered without further clinical and laboratory studies.

  18. Impact of online visual feedback on motor acquisition and retention when learning to reach in a force field.

    Science.gov (United States)

    Batcho, C S; Gagné, M; Bouyer, L J; Roy, J S; Mercier, C

    2016-11-19

    When subjects learn a novel motor task, several sources of feedback (proprioceptive, visual or auditory) contribute to the performance. Over the past few years, several studies have investigated the role of visual feedback in motor learning, yet evidence remains conflicting. The aim of this study was therefore to investigate the role of online visual feedback (VFb) on the acquisition and retention stages of motor learning associated with training in a reaching task. Thirty healthy subjects made ballistic reaching movements with their dominant arm toward two targets, on 2 consecutive days using a robotized exoskeleton (KINARM). They were randomly assigned to a group with (VFb) or without (NoVFb) VFb of index position during movement. On day 1, the task was performed before (baseline) and during the application of a velocity-dependent resistive force field (adaptation). To assess retention, participants repeated the task with the force field on day 2. Motor learning was characterized by: (1) the final endpoint error (movement accuracy) and (2) the initial angle (iANG) of deviation (motor planning). Even though both groups showed motor adaptation, the NoVFb-group exhibited slower learning and higher final endpoint error than the VFb-group. In some condition, subjects trained without visual feedback used more curved initial trajectories to anticipate for the perturbation. This observation suggests that learning to reach targets in a velocity-dependent resistive force field is possible even when feedback is limited. However, the absence of VFb leads to different strategies that were only apparent when reaching toward the most challenging target. Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.

  19. Selection for Career Course and Impact on Retention of Brazilian Air Force Officers

    Science.gov (United States)

    2015-03-01

    Departamento de Ensino ( Education Department) DOD Department of Defense ECEMAR Escola de Comando e Estado Maior da Aeronáutica (Air Force Command and Staff...institutional site of Brazilian Air Force (available at www.fab mil.br/ institucional ). 1 feedback work...2015 Tabulates the courses offered by the Department of Education (January 13, 2013) The Military Pay Act stipulates that any military member may

  20. Retention and radiative forcing of black carbon in eastern Sierra Nevada snow

    Directory of Open Access Journals (Sweden)

    K. M. Sterle

    2013-02-01

    Full Text Available When contaminated by absorbing particles, such as refractory black carbon (rBC and continental dust, snow's albedo decreases and thus its absorption of solar radiation increases, thereby hastening snowmelt. For this reason, an understanding of rBC's affect on snow albedo, melt processes, and radiation balance is critical for water management, especially in a changing climate. Measurements of rBC in a sequence of snow pits and surface snow samples in the eastern Sierra Nevada of California during the snow accumulation and ablation seasons of 2009 show that concentrations of rBC were enhanced sevenfold in surface snow (~25 ng g–1 compared to bulk values in the snowpack (~3 ng g–1. Unlike major ions, which were preferentially released during the initial melt, rBC and continental dust were retained in the snow, enhancing concentrations well into late spring, until a final flush occurred during the ablation period. We estimate a combined rBC and continental dust surface radiative forcing of 20 to 40 W m−2 during April and May, with dust likely contributing a greater share of the forcing.

  1. A Strategy To Increase United States Air Force Fighter Pilot Retention And Morale: Legendary Ace Robin Olds On The Silver Screen

    Science.gov (United States)

    2016-02-16

    investigated. Teaming with film producers is a valid way to promote the history of the Air Force, shaping a positive public image and celebrating a...resulted in low morale and reduced fighter pilot retention. As a potential short -term and low-cost solution to increase fighter pilot morale, the Air...his heroic efforts and the Air Force’s warrior spirit providing inspiration to generations of air warriors. The Air Force has a history of teaming

  2. Effect of tonic pain on motor acquisition and retention while learning to reach in a force field.

    Directory of Open Access Journals (Sweden)

    Mélanie Lamothe

    Full Text Available Most patients receiving intensive rehabilitation to improve their upper limb function experience pain. Despite this, the impact of pain on the ability to learn a specific motor task is still unknown. The aim of this study was to determine whether the presence of experimental tonic pain interferes with the acquisition and retention stages of motor learning associated with training in a reaching task. Twenty-nine healthy subjects were randomized to either a Control or Pain Group (receiving topical capsaicin cream on the upper arm during training on Day 1. On two consecutive days, subjects made ballistic movements towards two targets (NEAR/FAR using a robotized exoskeleton. On Day 1, the task was performed without (baseline and with a force field (adaptation. The adaptation task was repeated on Day 2. Task performance was assessed using index distance from the target at the end of the reaching movement. Motor planning was assessed using initial angle of deviation of index trajectory from a straight line to the target. Results show that tonic pain did not affect baseline reaching. Both groups improved task performance across time (p<0.001, but the Pain group showed a larger final error (under-compensation than the Control group for the FAR target (p = 0.030 during both acquisition and retention. Moreover, a Group x Time interaction (p = 0.028 was observed on initial angle of deviation, suggesting that subjects with Pain made larger adjustments in the feedforward component of the movement over time. Interestingly, behaviour of the Pain group was very stable from the end of Day 1 (with pain to the beginning of Day 2 (pain-free, indicating that the differences observed could not solely be explained by the impact of pain on immediate performance. This suggests that if people learn to move differently in the presence of pain, they might maintain this altered strategy over time.

  3. New Investigator and Trainee Task Force Survey on the Recruitment and Retention of Headache Specialists.

    Science.gov (United States)

    Minen, Mia T; Monteith, Tesha; Strauss, Lauren D; Starling, Amaal

    2015-09-01

    /most of the time. About 82.4% strongly agree that there needs to be improved headache education for physicians of all specialties (primary care, emergency department, psychiatry); 84.4% feel that they are appreciated by their patients; 68.6% feel that there is strong support in their departments for headache; 56.9% believe that their work schedule leaves enough time for personal and family life; and 60.8% agreed that their professional life will improve in years to come. Participants agreed/strongly agreed that they like to treat the following diseases/symptoms: migraine headache (98.0%), cluster headache (92%), chronic daily headache (84%), and post-concussive syndrome (71.4%). Participants disagreed/strongly disagreed that they like to treat the following comorbid conditions/symptoms: low back pain (66.6%), dizziness (42.9%), sleep apnea (36.7%), depression (32.0%), and anxiety (32.0%). In this detailed survey on the recruitment and retention of headache specialists, the following themes emerged: mentorship and exposure to a headache center are key foundations in the young investigator/trainee experience. Young headache specialists appear positive about their field of medicine. These specialists like to treat various headache types but not necessarily some of the related comorbidities (sleep disorders, depression, anxiety, back pain, and dizziness). Finally, there was strong agreement that there needs to be improved headache education for physicians of other medical specialties. © 2015 American Headache Society.

  4. [Measurements of the flux densities of static magnetic fields generated by two types of dental magnetic attachments and their retentive forces].

    Science.gov (United States)

    Xu, Chun; Chao, Yong-lie; Du, Li; Yang, Ling

    2004-05-01

    To measure and analyze the flux densities of static magnetic fields generated by two types of commonly used dental magnetic attachments and their retentive forces, and to provide guidance for the clinical application of magnetic attachments. A digital Gaussmeter was used to measure the flux densities of static magnetic fields generated by two types of magnetic attachments, under four circumstances: open-field circuit; closed-field circuit; keeper and magnet slid laterally for a certain distance; and existence of air gap between keeper and magnet. The retentive forces of the magnetic attachments in standard closed-field circuit, with the keeper and magnet sliding laterally for a certain distance or with a certain air gap between keeper and magnet were measured by a tensile testing machine. There were flux leakages under both the open-field circuit and closed-field circuit of the two types of magnetic attachments. The flux densities on the surfaces of MAGNEDISC 800 (MD800) and MAGFIT EX600W (EX600) magnetic attachments under open-field circuit were 275.0 mT and 147.0 mT respectively. The flux leakages under closed-field circuit were smaller than those under open-field circuit. The respective flux densities on the surfaces of MD800 and EX600 magnetic attachments decreased to 11.4 mT and 4.5 mT under closed-field circuit. The flux density around the magnetic attachment decreased as the distance from the surface of the attachment increased. When keeper and magnet slid laterally for a certain distance or when air gap existed between keeper and magnet, the flux leakage increased in comparison with that under closed-field circuit. Under the standard closed-field circuit, the two types of magnetic attachments achieved the largest retentive forces. The retentive forces of MD800 and EX600 magnetic attachments under the standard closed-field circuit were 6.20 N and 4.80 N respectively. The retentive forces decreased with the sliding distance or with the increase of air gap

  5. Aspectos fisiopatológicos da retenção de ovos em Jabutipiranga (Geochelone carbonaria Spix, 1824 Fisiopathological aspects of egg retention in South American Red-footed Tortoise (Geochelone carbonaria Spix, 1824

    Directory of Open Access Journals (Sweden)

    Carlos Alexandre Rey Matias

    2006-10-01

    Full Text Available Das enfermidades que acometem o sistema genital de répteis, a retenção de ovos tem grande prevalência em quelônios. Neste trabalho, são analisados quatorze casos de retenção de ovos na espécie jabutipiranga (Geochelone carbonaria Spix, 1824, mantidos como animais de companhia, os quais foram atendidos na Policlínica Veterinária da Universidade Federal Fluminense (UFF entre os anos de 1999 e 2003. Dos fatores que provocam ou favorecem a ocorrência dessa distocia, foram avaliados: em relação aos ovos retidos, a presença de ovos com alterações de formato e de tamanho aumentado e hipercalcificação das cascas; em relação aos fatores predisponentes, foram analisados fatores ambientais, sinais nos pacientes relacionados à ocorrência de doença osteometabólica, presença de corpo estranho ou fezes ressecadas no trato gastrintestinal, bem como a associação da retenção de ovos com prolapso de oviduto. A utilização de técnicas radiográficas no diagnóstico definitivo da retenção de ovos e no direcionamento da sua resolução mostrou-se indispensável nos casos estudados. Quanto ao tratamento, duas condutas foram consideradas: a utilização de ocitócinos e a intervenção cirúrgica. Da análise dos fatores que favorecem a ocorrência da distocia, conclui-se que a manutenção dos animais em ambientes com substrato rígido foi decisiva.Egg retention is a disorder that affects the genital system of reptiles, with a great prevalence in chelonians. These work analyses fourteen cases of egg retention in South American Red-footed Tortoise (Geochelone carbonaria Spix, 1824 maintained as pets that had been attended in the Veterinary Clinic of Universidade Federal Fluminense (UFF between 1999 and 2003. Among the factors that contribute to the occurrence of this dystocia are aspects of the retained eggs such as shape abnormalities, size enlargement and thickened shells were analyzed, as well as poor environmental condition

  6. U.S. Air Force Rated Retention Problem: An Analysis Through the Tactical Air Command Aircrew Concerns Report

    National Research Council Canada - National Science Library

    Little, James

    1980-01-01

    .... An appraisal of the problem is rendered using the psychological theories of Maslow, Maier and Herzberg. The conclusions identify' the rated retention problem as extensive and complex; point out a solution that should stop the loss of rated personnel and change those factors which cause the retention problem.

  7. Egg Allergy

    Science.gov (United States)

    ... Safe Videos for Educators Search English Español Egg Allergy KidsHealth / For Teens / Egg Allergy What's in this ... it's worth it. What Happens With an Egg Allergy? Eggs aren't bad. But when you're ...

  8. Exploring the retention properties of CaF2 nanoparticles as possible additives for dental care application with tapping-mode atomic force microscope in liquid.

    Science.gov (United States)

    Wasem, Matthias; Köser, Joachim; Hess, Sylvia; Gnecco, Enrico; Meyer, Ernst

    2014-01-13

    Amplitude-modulation atomic force microscopy (AM-AFM) is used to determine the retention properties of CaF2 nanoparticles adsorbed on mica and on tooth enamel in liquid. From the phase-lag of the forced cantilever oscillation the local energy dissipation at the detachment point of the nanoparticle was determined. This enabled us to compare different as-synthesized CaF2 nanoparticles that vary in shape, size and surface structure. CaF2 nanoparticles are candidates for additives in dental care products as they could serve as fluorine-releasing containers preventing caries during a cariogenic acid attack on the teeth. We show that the adherence of the nanoparticles is increased on the enamel substrate compared to mica, independently of the substrate roughness, morphology and size of the particles.

  9. Exploring the retention properties of CaF2 nanoparticles as possible additives for dental care application with tapping-mode atomic force microscope in liquid

    Directory of Open Access Journals (Sweden)

    Matthias Wasem

    2014-01-01

    Full Text Available Amplitude-modulation atomic force microscopy (AM-AFM is used to determine the retention properties of CaF2 nanoparticles adsorbed on mica and on tooth enamel in liquid. From the phase-lag of the forced cantilever oscillation the local energy dissipation at the detachment point of the nanoparticle was determined. This enabled us to compare different as-synthesized CaF2 nanoparticles that vary in shape, size and surface structure. CaF2 nanoparticles are candidates for additives in dental care products as they could serve as fluorine-releasing containers preventing caries during a cariogenic acid attack on the teeth. We show that the adherence of the nanoparticles is increased on the enamel substrate compared to mica, independently of the substrate roughness, morphology and size of the particles.

  10. The effect of inter-implant distance on retention and resistance to dislodging forces for mandibular implant-tissue-supported overdentures.

    Directory of Open Access Journals (Sweden)

    Farhad Tabatabaian

    2014-10-01

    Full Text Available The effect of inter-implant distance on retention and resistance of implant-tissue-supported overdentures is lacking in the literature. An in vitro study was performed to evaluate this effect for mandibular implant-tissue-supported overdentures retained by two ball attachments.An acrylic cast of an edentulous mandible was fabricated. Three pairs of implants were symmetrically placed at both sides of the midline. The inter-implant distance was 10, 25, and 35 millimeters in positions A, B and C, respectively. A framework simulating the overdenture was fabricated on the cast. Six attachment housings were placed within the overdenture. For each sample, two ball abutments were screwed onto the implant pairs and two pink nylon inserts were seated in their respective attachment housings. The samples were tested in three groups of 15 (A, B, and C. The testing machine applied tensile dislodging forces and peak loads were measured in three directions: vertical, oblique, and anterior-posterior. A one-way ANOVA followed by Tukey's HSD was used to determine groups that were significantly different. Tests were carried out at 0.05 level of significance.Peak loads for the anterior-posteriorly directed dislodging forces were significantly the highest for group C (P0.05.Inter-implant distance did not affect the vertical retention and oblique resistance of mandibular implant-tissue-supported overdentures; however, it affected anterior-posterior resistance.

  11. Validation of the GROMOS force-field parameter set 45A3 against nuclear magnetic resonance data of hen egg lysozyme

    International Nuclear Information System (INIS)

    Soares, T. A.; Daura, X.; Oostenbrink, C.; Smith, L. J.; Gunsteren, W. F. van

    2004-01-01

    The quality of molecular dynamics (MD) simulations of proteins depends critically on the biomolecular force field that is used. Such force fields are defined by force-field parameter sets, which are generally determined and improved through calibration of properties of small molecules against experimental or theoretical data. By application to large molecules such as proteins, a new force-field parameter set can be validated. We report two 3.5 ns molecular dynamics simulations of hen egg white lysozyme in water applying the widely used GROMOS force-field parameter set 43A1 and a new set 45A3. The two MD ensembles are evaluated against NMR spectroscopic data NOE atom-atom distance bounds, 3 J NHα and 3 J αβ coupling constants, and 1 5N relaxation data. It is shown that the two sets reproduce structural properties about equally well. The 45A3 ensemble fulfills the atom-atom distance bounds derived from NMR spectroscopy slightly less well than the 43A1 ensemble, with most of the NOE distance violations in both ensembles involving residues located in loops or flexible regions of the protein. Convergence patterns are very similar in both simulations atom-positional root-mean-square differences (RMSD) with respect to the X-ray and NMR model structures and NOE inter-proton distances converge within 1.0-1.5 ns while backbone 3 J HNα -coupling constants and 1 H- 1 5N order parameters take slightly longer, 1.0-2.0 ns. As expected, side-chain 3 J αβ -coupling constants and 1 H- 1 5N order parameters do not reach full convergence for all residues in the time period simulated. This is particularly noticeable for side chains which display rare structural transitions. When comparing each simulation trajectory with an older and a newer set of experimental NOE data on lysozyme, it is found that the newer, larger, set of experimental data agrees as well with each of the simulations. In other words, the experimental data converged towards the theoretical result

  12. Force

    CERN Document Server

    Graybill, George

    2007-01-01

    Forces are at work all around us. Discover what a force is, and different kinds of forces that work on contact and at a distance. We use simple language and vocabulary to make this invisible world easy for students to ""see"" and understand. Examine how forces ""add up"" to create the total force on an object, and reinforce concepts and extend learning with sample problems.

  13. PEEK Primary Crowns with Cobalt-Chromium, Zirconia and Galvanic Secondary Crowns with Different Tapers—A Comparison of Retention Forces

    Directory of Open Access Journals (Sweden)

    Veronika Stock

    2016-03-01

    Full Text Available In prosthetic dentistry, double crown systems have proved their suitability as retainers for removable partial dentures. However, investigations in this context, regarding polyetheretherketone, are scarce. Therefore, the aim of this study was to test the retention force (RF between polyetheretherketone (PEEK primary and cobalt-chromium (CoCr, zirconia (ZrO2 and galvanic (GAL secondary crowns with three different tapers. Primary PEEK-crowns were milled with the tapers 0°, 1°, and 2° (n = 10/taper, respectively. Afterwards, 90 secondary crowns were fabricated: (i 30 CoCr-crowns milled from Ceramill Sintron (AmannGirrbach, Koblach, Austria (n = 10/taper, (ii 30 ZrO2-crowns milled from Ceramill ZI (AmannGirrbach, Koblach, Austria (n = 10/taper, and (iii 30 GAL-crowns made using electroforming (n = 10/taper. RF was measured in a pull-off test (20 pull-offs/specimen and data were analyzed using 2-/1-way Analysis of Variance (ANOVA followed by the Tukey-Honestly Significant Difference (HSD post hoc test and linear regression analyses (p < 0.05. The measured mean RF values ranged between 9.6 and 38.2 N. With regard to the 0°, 1°, and 2° tapered crowns, no statistically significant differences between CoCr and ZrO2 were observed (p > 0.141. At 0° taper, no differences in retention forces between GAL, CrCr, and ZrO2 crowns were found (p = 0.075. However, at 1° and 2° taper, lower RF for GAL-crowns were observed (p < 0.009, p < 0.001, respectively. According to this laboratory study, PEEK might be a suitable material for primary crowns, regardless of the taper and the material of secondary crown. Long-term results, however, are still necessary.

  14. PRODUCTIVE AND EGG QUALITY TRAITS OF LAYING QUAIL SUBMITTED TO FORCED MOLTING ASPECTOS PRODUTIVOS E QUALIDADE DE OVOS DE CODORNAS JAPONESAS SUBMETIDAS A DIFERENTES MÉTODOS DE MUDA FORÇADA

    Directory of Open Access Journals (Sweden)

    Claúdio Cabral Campello

    2009-09-01

    Full Text Available This work was performed to verify egg production of Japanese quails submitted to induced molt by zinc oxide method (MZ and fasting (MC. A total number of 160 Japanese quails with 48 weeks of age were evaluated for post-molt egg production, percentage of egg contents and the viability rate of eggs for 12 weeks. According to the applied methods (fasting or zinc oxide, the birds were submitted to different body weight losses (BWL: 25 or 35%. The quails were separated into different treatment groups, according to their body weight loss during molt: Control group (unmolted quails, MC (induced by MC with 35% of BWL; MZ25 (induced by MZ with 25% of BWL; MZ35 (induced by MZ with 35% of BWL. Each treatment has 8 replicates with five birds each. The quails were evaluated for egg-laying production, egg weight, yolk and shell weight and their ratio. Between the second and fourth weeks of egg laying production, the MZ25 group had the best egg laying performance. There wasn’t significant improvements for egg characteristics and feed conversion of molted quails compared to the ones of control group. The forced molt by zinc oxide was able just to improve, numerically, egg production during the first weeks when the quails were submitted to a 25% body weight loss.

    KEY WORDS: Coturnix japonica, eggs, fasting, forced molting, quail, zinc oxide.

    O objetivo deste trabalho foi o de observar o desempenho produtivo obtido por codornas induzidas à muda pelo método alternativo do óxido de zinco (MZ e método convencional ou do jejum (MC. Foram utilizadas 160 codornas japonesas, com 48 semanas de idade, para avaliação do desempenho, do percentual dos constituintes dos ovos, bem como da taxa de ovos viáveis, durante doze semanas. De acordo com o método utilizado, a fome forçada ou a anorexia parcial provocou perda de peso corporal (PPC nas aves, sendo formados os seguintes grupos: Controle (codornas não tratadas; MC (indução pelo MC com

  15. Digital Game-Based Learning (DGBL) in the L2 Classroom: The Impact of the UN's Off-the-Shelf Videogame, Food Force, on Learner Affect and Vocabulary Retention

    Science.gov (United States)

    Hitosugi, Claire Ikumi; Schmidt, Matthew; Hayashi, Kentaro

    2014-01-01

    This mixed-method study explored the impact of "Food Force (FF)", a UN-sponsored off-the-shelf videogame, on learner affect and vocabulary learning and retention in a Japanese as a second/foreign language classroom. The videogame was integrated into an existing curriculum and two studies were performed. In Study 1 (n = 9), new vocabulary…

  16. Egg Allergy

    Science.gov (United States)

    ... if you have egg allergy: albumin globulin livetin lysozyme ovalbumin ovoglobulin ovomucin ovomucoid ovotransferrin ovovitella ovovitellin silici ... want to make sure you're still getting protein from other foods. Some good ones are meat, ...

  17. Investigation on the effects of dietary protein reduction with constant ratio of digestible sulfur amino acids and threonine to lysine on performance, egg quality and protein retention in two strains of laying hens

    Directory of Open Access Journals (Sweden)

    Farhad Foroudi

    2013-01-01

    Full Text Available An experiment was conducted to determine the possibility of using various levels of crude protein (CP by providing laying hens with constant levels of digestible sulfur amino acid, threonine and lysine to improve performance and egg quality. The experiment was conducted as a completely randomized block design in a factorial arrangement (4 × 2 with 8 replicates of 10 hens in each. Factors included 4 levels of CP (18.5%, 17.5%, 16.5% and 15.5% and 2 strains (LSL and Hy-Line W-36 of laying hens. Hens were fed experimental diets from 25 to 33 weeks of age. Production performance was measured for eight weeks and egg quality characteristics were determined at 29 and 33 weeks of age. Protein reduction decreased egg weight, egg mass and hen body weight linearly (P≤0.01. Egg production was not affected by protein reduction but feed efficiency, and average daily feed intake increased significantly (P≤0.01. Lohmann Selected Leghorn laying hens showed significantly higher egg production, egg weight, egg mass, weight gain, feed efficiency and feed intake compared to the W-36 laying hens (P≤0.01. Shell thickness increased linearly as protein levels decreased (P≤0.05. There were significant differences between two strains on the egg quality characteristics (P≤0.01. Significant (P≤0.05 CP × strain interactions were observed for hen weight, albumen height, Haugh units, yolk and shell percentage. Based on the results of this experiment, a reduction in dietary protein level (from 18.5% to 15.5%, without any alteration in digestible TSAA and Thr: Lys ratio, led to inferior egg mass and feed conversion ratio during the peak production period.

  18. Hydrogen-peroxide-modified egg albumen for transparent and flexible resistive switching memory

    Science.gov (United States)

    Zhou, Guangdong; Yao, Yanqing; Lu, Zhisong; Yang, Xiude; Han, Juanjuan; Wang, Gang; Rao, Xi; Li, Ping; Liu, Qian; Song, Qunliang

    2017-10-01

    Egg albumen is modified by hydrogen peroxide with concentrations of 5%, 10%, 15% and 30% at room temperature. Compared with devices without modification, a memory cell of Ag/10% H2O2-egg albumen/indium tin oxide exhibits obviously enhanced resistive switching memory behavior with a resistance ratio of 104, self-healing switching endurance for 900 cycles and a prolonged retention time for a 104 s @ 200 mV reading voltage after being bent 103 times. The breakage of massive protein chains occurs followed by the recombination of new protein chain networks due to the oxidation of amidogen and the synthesis of disulfide during the hydrogen peroxide modifying egg albumen. Ions such as Fe3+, Na+, K+, which are surrounded by protein chains, are exposed to the outside of protein chains to generate a series of traps during the egg albumen degeneration process. According to the fitting results of the double logarithm I-V curves and the current-sensing atomic force microscopy (CS-AFM) images of the ON and OFF states, the charge transfer from one trap center to its neighboring trap center is responsible for the resistive switching memory phenomena. The results of our work indicate that hydrogen- peroxide-modified egg albumen could open up a new avenue of biomaterial application in nanoelectronic systems.

  19. Work force retention: Role of work environment, organization commitment, supervisor support and training & development in ceramic sanitary ware industries in India

    Energy Technology Data Exchange (ETDEWEB)

    Umamaheswari S, Jayasree Krishnan

    2016-07-01

    Although retention of employees has become hot topic in this career turbulent era, practically no empirical research is carried out in the fast growing ceramic sector till now and this research fills the gap in the literature. The literatures surveys reported that organization commitment is an important determinant of retention and work environment, supervisor support and training and development are the most relevant antecedents increasing commitment towards organization. This paper examines the impact of the above factors over organization commitment and explores the effects of organization commitment on retention, and verifies the mediating effect of organization commitment on the relationship between proposed factors and retention. Design/methodology/approach: A survey was completed by 416 employees working in five ceramic sanitary ware factories located at different places in India. Questionnaire consisting of items adopted from previous researches were used to collect data. The selection of respondents was based on the simple random sampling. Findings: Findings reveals that organization commitment influences retention and all the above factors enhances it. Moreover organization commitment partially mediates the relationship between proposed factors and retention. However multiple regression analysis indicated that training and development did not have any notable influence on retention. Limitations: This study was conducted in a particular country and also in a particular sector of manufacturing industry, which limits generalization .Possibility of bias towards their organization and assumption that respondents know about their organization are other limitations. Implications: This paper offers recommendations to HR(Human resource) managers that they should extend their support to work environment, supervisor support and training and development in order to generate better relationship with employees and to reduce their likelihood of leaving the company

  20. Work force retention: Role of work environment, organization commitment, supervisor support and training & development in ceramic sanitary ware industries in India

    Directory of Open Access Journals (Sweden)

    Umamaheswari S

    2016-08-01

    Full Text Available Purpose: Although retention of employees has become hot topic in this career turbulent era, practically no empirical research is carried out in the fast growing ceramic sector till now and this research fills the gap in the literature. The literatures surveys reported that organization commitment is an important determinant of retention and work environment, supervisor support and training and development are the most relevant antecedents increasing commitment towards organization. This paper examines the impact of the above factors over organization commitment and explores the effects of organization commitment on retention, and verifies the mediating effect of organization commitment on the relationship between proposed factors and retention. Design/methodology/approach: A survey was completed by 416 employees working in five ceramic sanitary ware factories located at different places in India. Questionnaire consisting of items adopted from previous researches were used to collect data. The selection of respondents was based on the simple random sampling. Findings: Findings reveals that organization commitment influences retention and all the above factors enhances it. Moreover organization commitment partially mediates the relationship between proposed factors and retention. However multiple regression analysis indicated that training and development did not have any notable   influence on retention. Limitations: This study was conducted in a particular country and also in a particular sector of manufacturing industry, which limits generalization .Possibility of bias towards their organization and assumption that respondents know about their organization are other limitations. Implications: This paper offers recommendations to HR(Human resource managers that they should extend their support to work environment, supervisor support and training and development in order to generate better relationship with employees and to reduce their

  1. Egg dumping in insects.

    Science.gov (United States)

    Tallamy, Douglas W

    2005-01-01

    Females that place eggs under the care of conspecifics have been labeled egg dumpers. Egg dumping is an effective reproductive alternative that lowers risks for, and has the potential to increase fecundity in, its practitioners. Although insect egg dumpers can be social parasites of the maternal behavior of egg recipients, dumping is more likely to be a viable reproductive alternative when the costs to egg recipients are low and thus the defense by potential hosts against egg dumping intrusions is minimal. These conditions are met in insects that guard only eggs or in insects whose eggs hatch into self-supporting precocial young that need little beyond defense from parents. When this is the case, egg dumping is favored by natural and/or kin selection as a mechanism by which dumpers can avoid parental risks and increase fecundity, and egg recipients can enhance offspring survival by diluting predation.

  2. Multiseed liposomal drug delivery system using micelle gradient as driving force to improve amphiphilic drug retention and its anti-tumor efficacy.

    Science.gov (United States)

    Zhang, Wenli; Li, Caibin; Jin, Ya; Liu, Xinyue; Wang, Zhiyu; Shaw, John P; Baguley, Bruce C; Wu, Zimei; Liu, Jianping

    2018-11-01

    To improve drug retention in carriers for amphiphilic asulacrine (ASL), a novel active loading method using micelle gradient was developed to fabricate the ASL-loaded multiseed liposomes (ASL-ML). The empty ML were prepared by hydrating a thin film with empty micelles. Then the micelles in liposomal compartment acting as 'micelle pool' drove the drug to be loaded after the outer micelles were removed. Some reasoning studies including critical micelle concentration (CMC) determination, influencing factors tests on entrapment efficiency (EE), structure visualization, and drug release were carried out to explore the mechanism of active loading, ASL location, and the structure of ASL-ML. Comparisons were made between pre-loading and active loading method. Finally, the extended drug retention capacity of ML was evaluated through pharmacokinetic, drug tissue irritancy, and in vivo anti-tumor activity studies. Comprehensive results from fluorescent and transmission electron microscope (TEM) observation, encapsulation efficiency (EE) comparison, and release studies demonstrated the formation of ML-shell structure for ASL-ML without inter-carrier fusion. The location of drug mainly in inner micelles as well as the superiority of post-loading to the pre-loading method , in which drug in micelles shifted onto the bilayer membrane was an additional positive of this delivery system. It was observed that the drug amphiphilicity and interaction of micelles with drug were the two prerequisites for this active loading method. The extended retention capacity of ML has been verified through the prolonged half-life, reduced paw-lick responses in rats, and enhanced tumor inhibition in model mice. In conclusion, ASL-ML prepared by active loading method can effectively load drug into micelles with expected structure and improve drug retention.

  3. The Egg Joust

    Science.gov (United States)

    Bosworth, Wade A.; Wilkinson, John

    2008-01-01

    The use of eggs and mousetraps in physics is commonplace in most American high school physics classrooms. The egg drops, the egg walk, and the great Canadian egg race, as well as the mousetrap cars, have all been well-documented in this journal. These types of collaborative, competitive projects are a great way to motivate students. Students at…

  4. Interventions for shell eggs

    Science.gov (United States)

    Eggs are the second riskiest foods regulated by the U.S. FDA. Less than 3% of shell eggs are pasteurized using a hot water process that unfortunately damages the appearance and functionality of the eggs. In addition, the current process adds more than $1.50 to the cost of a dozen eggs. Therefore, al...

  5. Military Retention. A Comparative Outlook

    Directory of Open Access Journals (Sweden)

    Vasile Sminchise

    2016-06-01

    Full Text Available One of the main goals for human resources management structures and for armed forces leaders is to maintain all necessary personnel, both qualitatively and quantitatively for operational needs or for full required capabilities. The retention of military personnel is essential to keep morale and unit readiness and to reduce the costs for recruiting, training, replacement of manpower. Retention rates depend not only on money or other social measures. The goal for retention is to keep in use the most valuable resource that belongs to an organization: the human beings and their knowledge. The aim pf this paper is to provide a comparative analysis of retention measures in various countries based on Research and Technology Organisation report released in 2007 and, thus, provide more examples of retention measures as far as the Romanian military system is concerned.

  6. Why does a spinning egg rise?

    Science.gov (United States)

    Cross, Rod

    2018-03-01

    Experimental and theoretical results are presented concerning the rise of a spinning egg. It was found that an egg rises quickly while it is sliding and then more slowly when it starts rolling. The angular momentum of the egg projected in the XZ plane changed in the same direction as the friction torque, as expected, by rotating away from the vertical Z axis. The latter result does not explain the rise. However, an even larger effect arises from the Y component of the angular momentum vector. As the egg rises, the egg rotates about the Y axis, an effect that is closely analogous to rotation of the egg about the Z axis. Both effects can be described in terms of precession about the respective axes. Steady precession about the Z axis arises from the normal reaction force in the Z direction, while precession about the Y axis arises from the friction force in the Y direction. Precession about the Z axis ceases if the normal reaction force decreases to zero, and precession about the Y axis ceases if the friction force decreases to zero.

  7. Retention of crowns cemented on implant abutments with temporary cements.

    Science.gov (United States)

    Nagasawa, Yuko; Hibino, Yasushi; Nakajima, Hiroshi

    2014-01-01

    This study was to examine the retentive force of crowns to implant abutments with commercial temporary cements. Six different temporary cements were investigated. Cast crowns were cemented to the abutments using each cement and their retentive forces to abutments were determined 7 or 28 days after cementing (n=10). The retentive force of the cements to abutments varied widely among the products [27-109 N (7-day), 18-80 N (28-days)]. The retentive force of all the cements was not reduced as the time elapsed, except for two products tested. The polycarboxylate cements and paste-mixing type eugenol-free cements revealed comparable retentive force after 28 days of storage. The powder-liquid type cements showed a positive correlation (pcement between the retentive force and compressive strength. Mechanical strength of temporary cements could not be a prominent predicting factor for retention of the crowns on the abutments.

  8. The Walking Egg non-profit organisation

    OpenAIRE

    Dhont, N.

    2011-01-01

    The Walking Egg non-profit organisation (npo) was founded in 2010 by scientists and an artist to realise the Arusha Project which strives to implement accessible infertility programmes in resource-poor countries. Right from the start The Walking Egg has opted for a multidisciplinary and global approach towards the problem of infertility and in cooperation with the Special Task Force (STF) on “Developing countries and infertility” of the European Society of Human reproduction and Embryology (E...

  9. Have eggs. Will travel

    DEFF Research Database (Denmark)

    Kroløkke, Charlotte

    2015-01-01

    Feminist scholars have critically questioned the practices and ethics of reproductive mobility. While the reproductive mobility of fertility patients has been foregrounded, little is known of egg donor mobility including the experiences of travelling internationally to donate eggs. Based on written...... stories and photographic material provided by forty-two egg donors, this article uses feminist cluster analysis and the concept of eggpreneurship to illustrate how global egg donors negotiate reproductive agency and choice when they travel internationally to donate their eggs. In their stories, global egg...

  10. [Study on retention and stability of linear occlusal complete dentures].

    Science.gov (United States)

    Zhang, Ping; Xu, Jun

    2003-01-01

    To learn retention and stability of linear occlusal complete dentures by investigating the subjective feelings of patient and the value of retention force. Static retention forces of maxillary and mandibular dentures were measured for 25 patients wearing linear occlusal dentures by using Hz-1 retention dynamometer. The subjective feelings of patients in functional state were gained simultaneously through questionnaire. Linear occlusal dentures demonstrate good retention in static and dynamic state. Among patients with severe resorption of residual ridge (RRR), mandibular linear occlusal dentures (shown good retentive subjective feelings) demonstrate significantly smaller retention force than those with slight or medium degree of RRR. There is no correlation between the subjective feelings and the values of retention forces of mandibular dentures. The subjective feelings of patients wearing new linear occlusal dentures are much better than that of old anatomic occlusal dentures. Linear occlusal dentures improve the performances of dentures by enhancing their stability during mastication movement.

  11. Egg retention and intrauterine embryonic development in Sceloporus aeneus (Reptilia: Phrynosomatidae: implications for the evolution of viviparity Retención de huevos y avance embrionario intrauterino en Sceloporus aeneus (Reptilia: Phrynosomatidae: implicaciones para la evolución de la viviparidad

    Directory of Open Access Journals (Sweden)

    Rodolfo García-Collazo

    2012-09-01

    Full Text Available Egg retention (ER and intrauterine embryonic development (IED have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus bicanthalis. The present study addresses the following 2 questions: 1 Are intermediate stages of egg retention (ER and IED present in populations of Sceloporus aeneus? and 2 Are ER and/or IED explained by elevation, precipitation or phylogenetic effects? Results indicate that in S. aeneus, ER differs among populations. ER was negatively related to altitude and pluvial precipitation, whereas average environmental temperature had no effect on ER or IER. In contrast to previous observations of oviparous species related to viviparous species, populations of S. aeneus with advanced IED are associated with environmental factors such as low elevation and aridity instead of high elevation and cold climate, whereas the comparative analysis shows that there are no significative evolutionary changes throughout the phylogeny, which means that the altitude has no effect on the transition to the evolution of viviparity in S. aeneus-S bicanthalis.La retención de huevos (ER y el desarrollo embrionario intrauterino (IED han sido considerados pasos intermedios hacia la viviparidad. Sceloporus aeneus es un lacertilio ovíparo estrechamente relacionado a una especie vivípara (Sceloporus bicanthalis. El presente estudio derivó de las preguntas: ¿El ER y el IED presentes en las poblaciones de S. aeneus son estadios intermedios a la viviparidad? ¿ER y/o IED son explicados por la temperatura, altitud, precipitación pluvial o son un efecto filogenético? En S. aeneus, el ER y el IED fueron diferentes entre poblaciones. Los resultados indicaron que la ER se relacionó negativamente con la altitud y la precipitación pluvial, mientras que no se encontró efecto con la temperatura ambiental. En contraste con

  12. Mosquito, egg raft (image)

    Science.gov (United States)

    Mosquitoes of the Culex species lay their eggs in the form of egg rafts that float in still or stagnant water. The mosquito ... mosquitoes. (Image courtesy of the Centers for Disease Control and Prevention.)

  13. The Egg Joust

    Science.gov (United States)

    Bosworth, Wade A.; Wilkinson, John

    2008-09-01

    The use of eggs and mousetraps in physics is commonplace in most American high school physics classrooms. The egg drops,1,2 the egg walk,3 and the great Canadian egg race,4 as well as the mousetrap cars,5 have all been well-documented in this journal. These types of collaborative, competitive projects are a great way to motivate6 students. Students at Greendale High School in suburban Milwaukee, WI, participate in an annual egg-jousting competition that combines the energy of a mousetrap with the delicateness of an egg. For this evening event, students gather in costume for a night of medieval intrigue where parents and friends witness the peril of two eggs colliding while atop their trusty steed.

  14. Incorporation of radioactive zinc into the eggs of Japanese quails (coturnix coturnix Japonica)

    International Nuclear Information System (INIS)

    Matsusaka, Naonori; Nishimura, Yoshikazu; Nakamura, Isao; Yuyama, Akira

    1975-01-01

    The incorporation of 65 Zn into eggs was investigated after single or daily intraperitoneal administration to laying Japanese quails. After a single intraperitoneal administration, 65 Zn appeared first in the 2nd egg yolks and reached the highest level in the 3rd and 4th ones, followed by a gradual decrease. The cumulative amount of 65 Zn in the egg yolks over a period of 3 weeks accounted for about 40% of dose. After daily intraperitoneal administration, the 6th-9th egg's yolks contained the highest radioactivity of the eggs examined. Whole-body retention patterns were also observed in both of the experiments. (auth.)

  15. Egg introduction: differential allergic responses

    Directory of Open Access Journals (Sweden)

    Dosanjh A

    2017-04-01

    Full Text Available Amrita Dosanjh Medical Center, Rady Childrens Hospital, San Diego, CA, USA Abstract: The use of egg protein preparations in clinical trials to reduce the incidence of egg allergy among infants includes a number of preparations of egg. These include whole egg, egg white protein, and egg yolk preparations. The study of the differential immune responses to these allergenic proteins in comparison is suggested as a future research area of investigation. Keywords: food allergy, egg allergy, clinical trial, atopy

  16. Egg introduction: differential allergic responses

    OpenAIRE

    Dosanjh,Amrita

    2017-01-01

    Amrita Dosanjh Medical Center, Rady Childrens Hospital, San Diego, CA, USA Abstract: The use of egg protein preparations in clinical trials to reduce the incidence of egg allergy among infants includes a number of preparations of egg. These include whole egg, egg white protein, and egg yolk preparations. The study of the differential immune responses to these allergenic proteins in comparison is suggested as a future research area of investigation. Keywords: food allergy, egg allergy, clinica...

  17. Endoscopy-guided ectopic egg removal from the urinary bladder in a leopard tortoise (Stigmochelys pardalis).

    Science.gov (United States)

    Mans, Christoph; Foster, Jonathan D

    2014-06-01

    Egg retention in the urinary bladder of a leopard tortoise was diagnosed by radiography and confirmed by cystoscopy. The egg was removed with a modified polypectomy snare, aided by a flexible endoscope and insufflation. No complications occurred during the procedures and the tortoise made a complete recovery.

  18. Helmint eggs elimination performance during lammelar settling and sand filters in Beniel WWTP (Murcia, Spain)

    International Nuclear Information System (INIS)

    Simon Andreu, P. J.; Cardin Mifsut, C.; Pacheco Ballarin, S.; Martinez Muro, M. A.; Vicente Gonzalez, J. A.; Llosar Llacer, C.

    2010-01-01

    With this study, it was observed Ascaris suum eggs elimination yield of tertiary treatment in Beniel wastewater treatment plant (WWTP) in Murcia Region (Spain). It was inoculated a sample of Ascaris suum eggs in the treatment in maximum flow conditions and it was calculated the retention yield of the lamellar settling and sand filters. (Author) 3 refs.

  19. Egg origin determination efforts

    International Nuclear Information System (INIS)

    Horvath, A.; Futo, I.; Vodila, G.; Palcsu, L.

    2012-01-01

    Complete text of publication follows. As a co-operation with the Poultry Product Board, egg and drinking water samples were received in order to investigate whether the country of origin of the egg can be determined based on its stable isotope composition with the aim of market protection of the Hungarian eggs against the mislabelled foreign ones. The scientific background is that drinking water of egg laying hens is assumed to reflect the composition of regional precipitation, and it is also an input data in the process of egg formation. In the first sampling, altogether 23 sets of egg and drinking water samples were received from different production sites covering the whole area of Hungary. The egg white samples were vacuum distilled and frozen out by liquid nitrogen at -196 deg C. The process was monitored by two vacuum gauges. Water frozen out together with the drinking water samples was measured were measured by a Thermo Finnigan Delta PLUS XP isotope ratio mass spectrometer using a GasBench II peripheral unit equipped with a GC-autosampler. As a second issue, additionally, elemental composition of egg shells were also performed for series of Hungarian, Czech and Polish egg samples by energy dispersive X-ray fluorescence. The drinking waters fit well to the Global Meteoric Water Line indicating their precipitation origin. It was experienced that the water in egg white gets enriched compared to the drinking water (Δ 18 O = -4.9 ± 1.0 per thousand and Δ D = -21.8 ± 6.4 per thousand), however, this shift is independent of the type of the hens, since the mean shifts in the eggs of Tetra and Hy-line hens are similar within error bar. For more depleted drinking water, the shift of the egg white was higher than for more enriched ones. This can be due to the contribution of the nutriment isotopic composition. The water isotope composition of the Hungarian eggs investigated was δ 18 O = -4.8 - -7.3 per thousand and δD = -46.0 - -70.7 per thousand, therefore egg

  20. Managing retention.

    Science.gov (United States)

    Carter, Tony

    2007-01-01

    To build this process it is necessary to consult customers for preferences, build familiarity and knowledge to build a relationship and conduct business in a customized fashion. The process takes every opportunity to build customer satisfaction with each customer contact. It is an important process to have, since customers today are more demanding, sophisticated, educated and comfortable speaking to the company as an equal (Belk, 2003). Customers have more customized expectations so they want to be reached as individuals (Raymond and Tanner, 1994). Also, a disproportionate search for new business is costly. The cost to cultivate new customers is more than maintaining existing customers (Cathcart, 1990). Other reasons that customer retention is necessary is because many unhappy customers will never buy again from a company that dissatisfied them and they will communicate their displeasure to other people. These dissatisfied customers may not even convey their displeasure but without saying anything just stop doing business with that company, which may keep them unaware for some time that there is any problem (Cathcart, 1990).

  1. Are all eggs equal?

    NARCIS (Netherlands)

    Nangsuay, A.

    2016-01-01

    Hatching eggs, supplied to hatcheries are originating from different origins varying in breed, strain, and breeder age. These hatching eggs can be different in size, composition and eggshell properties, which might influence nutrient and O2 availability and consequently could affect embryonic

  2. Comparisons of egg quality traits, egg weight loss and hatchability between striped and normal duck eggs.

    Science.gov (United States)

    Yuan, J; Wang, B; Huang, Z; Fan, Y; Huang, C; Hou, Z

    2013-01-01

    1. The egg quality of striped and normal duck eggs was compared to determine why striped eggs show decreased hatchability. A total of 430 eggs, obtained from a Pekin duck breeder flock aged 50-65 wks, were used in three experiments. The eggs were weighed and assigned randomly to measure egg quality traits, egg weight (EW) loss and hatchability during incubation. 2. There were no significant differences between egg types in terms of egg shape index, eggshell strength and thickness, albumen height, Haugh unit, yolk colour, weight of the eggshell with or without membranes, calcium, phosphorus, copper and manganese contents in the eggshell (with the inner and outer membranes or without the inner membrane), albumen weight, dry matter of albumen, crude protein (CP) of thick albumen and pH of the thick albumen. 3. The weight of eggshells with membranes, weight of thick albumen and CP of thin albumen in striped eggs were lower than those in normal eggs. 4. The thin albumen in striped eggs was heavier than that in normal eggs. The pH of the thin albumin in striped egg was significantly higher than that in normal eggs. 5. There were no significant differences in EW loss during incubation or duckling weight between striped and normal eggs. However, the hatchability of striped eggs was lower. 6. The lower weight of the eggshell inner membrane and thick albumen, lower CP content and higher pH in the thin albumen of striped eggs might contribute to lower hatchability.

  3. Effects of dietary boron on performance, egg production, egg quality ...

    African Journals Online (AJOL)

    In this study dietary boron at different doses (0, 25, 50, 100 and 200 mg/kg feed) was supplemented to layers from 4 to 64 weeks of age. There was no significant difference between treatments with respect of mortality, egg production, egg weight, egg mass and cracked eggs. Significant increases were observed in body ...

  4. Phenotypic correlations between egg weight and some egg quality ...

    African Journals Online (AJOL)

    Eggs were examined for both internal and external egg quality traits.Data obtained were subjected to one-way analysis of variance using the general linear procedure of SAS (2012). Differences in means were ranked using the Duncan's multiple Range test. Phenotypic correlations between egg weight and other egg quality ...

  5. Flu Vaccine and People with Egg Allergies

    Science.gov (United States)

    ... able to eat lightly cooked egg (e.g., scrambled egg) without reaction are unlikely to be allergic. Egg- ... able to eat lightly cooked egg (e.g., scrambled egg) without reaction, you are unlikely to be allergic ...

  6. Influence of the mechanical properties of resilient denture liners on the retention of overdenture attachments.

    Science.gov (United States)

    Kubo, Keitaro; Koike, Takashi; Ueda, Takayuki; Sakurai, Kaoru

    2018-03-15

    Information is lacking about the selection criteria for silicone resilient denture liners applied as a matrix material for attachments on overdentures. The purpose of this in vitro study was to investigate the mechanical properties of silicone resilient denture liners and their influence on the initial retention force of overdenture attachments and the reduction in retention force over time. Nine types of silicone resilient denture liner were injected and fixed to the matrix section of an experimental denture base. They were then fitted to an epoxy resin model that simulated the residual ridge with a patrix ball attachment (n=10). The retention force of the denture was measured with a digital force gauge, and the maximum force of traction (N) was regarded as the initial retention force. The retention force reduction (N) after repeated insertion and removal (n=5) was calculated by subtracting the retention force after 3348 cycles (3-year simulated insertion and removal) from the initial retention force. The intaglio of the matrix was observed with a scanning electron microscope (SEM) before and after the 3348 cycles. Four mechanical properties (hardness, strain-in-compression, tensile strength, and arithmetic mean roughness) of the resilient denture liners were measured. One-way ANOVA of the initial retention force of each lining material was performed, followed by the Scheffe test (α=.05). Pearson correlation analysis was used (α=.05) to analyze correlations of the initial retention force with the retention force reduction after insertion and removal and the mechanical properties of each material. Multiple regression analysis with the stepwise method extracted the initial retention force and the retention force reduction as dependent variables, and the resilient denture liner mechanical properties as explanatory variables (α=.05). The initial retention force of the resilient denture liners was 1.3 to 5.4 N. Multiple comparisons showed significant differences in

  7. Eggs on Ice

    DEFF Research Database (Denmark)

    Herrmann, Janne Rothmar; Kroløkke, Charlotte

    2018-01-01

    While Denmark is widely known as a global exporter of cryopreserved sperm, Danish women’s eggs face a very different fate. This paper combines legal and rhetorical analyses with the concept of sociotechnical imaginaries. In establishing the genealogy of the sociotechnical imaginaries that shaped...... Danish regulation of the cryopreservation of eggs, we analyse the relevant Acts, Bills, preparatory work, and readings in Parliament, along with the concurrent public and ethical debates that over time relaxed the legal limit for the cryopreservation of eggs to the current five years and today continue...... to ignite discussions on elective egg freezing. We rely on welfare-state perspectives to discuss why reproduction, in the Danish context, is seen as a legitimate and appropriate sphere to regulate, and we turn to feminist theorizing to discuss the gendered implications captured in the sociotechnical...

  8. Dinosaur Eggs and Babies

    Science.gov (United States)

    Carpenter, Kenneth; Hirsch, Karl F.; Horner, John R.

    1996-01-01

    In the last couple of decades the study of dinosaur eggs and babies has proved to be one of the most exciting and profitable areas of dinosaur research. This is the first book solely devoted to this topic and reviews, in scientific detail, our present state of knowledge about this exciting area of palaeontology. Chapters in the book discuss all aspects of the science including the occurrence of eggs, nests and baby skeletons, descriptive osteology of juvenile skeletons, comparative histology of juvenile bone, analyses of eggs and egg shells, palaeoenvironments of nesting sites, nesting behaviour and developmental growth of baby dinosaurs. The volume will be an invaluable addition to the book collections of vertebrate palaeontologists and their graduate students.

  9. LCA of Egg Phospholipids

    OpenAIRE

    Berggren, Anders

    2013-01-01

    Egg phospholipids are a group of fats or lipids in the egg yolk, commonly used as emulsifiers in the chemical industry to facilitate the dissolving of substances. The pharmaceutical company Fresenius-Kabi manufactures this product and seeks a better understanding of the product’s major environmental impacts in order to comply with the ISO 14001 requirements, communicate its environmental performance and choose raw materials that result in lower environmental impacts. The aim of this study is ...

  10. Proteomics analysis of egg white proteins from different egg varieties.

    Science.gov (United States)

    Wang, Jiapei; Liang, Yue; Omana, Dileep A; Kav, Nat N V; Wu, Jianping

    2012-01-11

    The market of specialty eggs, such as omega-3-enriched eggs, organic eggs, and free-range eggs, is continuously growing. The nutritional composition of egg yolk can be manipulated by feed diet; however, it is not known if there is any difference in the composition of egg white proteins among different egg varieties. The purpose of the study was to compare the egg white proteins among six different egg varieties using proteomics analysis. Egg white proteins were analyzed using two-dimensional gel electrophoresis (2-DE), and 89 protein spots were subjected to LC-MS/MS. A total of 23 proteins, belonging to Gallus gallus , were identified from 72 detected protein spots. A quiescence-specific protein precursor in egg white was identified for the first time in this study. Significant differences in the abundant levels of 19 proteins (from 65 protein spots) were observed among six egg varieties. Four proteins, ovalbumin-related protein Y, cystatin, avidin, and albumin precursor, were not different among these six egg varieties. These findings suggest that the abundance, but not the composition, of egg white proteins varied among the egg varieties.

  11. Fuel nozzle tube retention

    Energy Technology Data Exchange (ETDEWEB)

    Cihlar, David William; Melton, Patrick Benedict

    2017-02-28

    A system for retaining a fuel nozzle premix tube includes a retention plate and a premix tube which extends downstream from an outlet of a premix passage defined along an aft side of a fuel plenum body. The premix tube includes an inlet end and a spring support feature which is disposed proximate to the inlet end. The premix tube extends through the retention plate. The spring retention feature is disposed between an aft side of the fuel plenum and the retention plate. The system further includes a spring which extends between the spring retention feature and the retention plate.

  12. Genetic characterization of egg weight, egg production and age at first egg in quails

    NARCIS (Netherlands)

    Marubayashi Hidalgo, A.; Martins, E.N.; Santos, A.L.; Quadros, T.C.O.; Ton, A.P.S.; Teixeira, R.

    2011-01-01

    The objective of this research was to estimate genetic parameters for the traits egg weight, egg production in 189 days and age at first egg in three laying quails and one meat line of quails. Data was analyzed by Bayesian procedures using Gibbs sampling. The heritability estimates for egg weight,

  13. Cracking the egg: An insight into egg hypersensitivity.

    Science.gov (United States)

    Dhanapala, Pathum; De Silva, Chamika; Doran, Tim; Suphioglu, Cenk

    2015-08-01

    Hypersensitivity to the chicken egg is a widespread disorder mainly affecting 1-2% of children worldwide. It is the second most common food allergy in children, next to cow's milk allergy. Egg allergy is mainly caused by hypersensitivity to four allergens found in the egg white; ovomucoid, ovalbumin, ovotransferrin and lysozyme. However, some research suggests the involvement of allergens exclusively found in the egg yolk such as chicken serum albumin and YGP42, which may play a crucial role in the overall reaction. In egg allergic individuals, these allergens cause conditions such as itching, atopic dermatitis, bronchial asthma, vomiting, rhinitis, conjunctivitis, laryngeal oedema and chronic urticaria, and anaphylaxis. Currently there is no permanent cure for egg allergy. Upon positive diagnosis for egg allergy, strict dietary avoidance of eggs and products containing traces of eggs is the most effective way of avoiding future hypersensitivity reactions. However, it is difficult to fully avoid eggs since they are found in a range of processed food products. An understanding of the mechanisms of allergic reactions, egg allergens and their prevalence, egg allergy diagnosis and current treatment strategies are important for future studies. This review addresses these topics and discusses both egg white and egg yolk allergy as a whole. Copyright © 2015 Elsevier Ltd. All rights reserved.

  14. Egg attachment of the asparagus beetle Crioceris asparagi to the crystalline waxy surface of Asparagus officinalis

    Science.gov (United States)

    Voigt, Dagmar; Gorb, Stanislav

    2010-01-01

    Plant surfaces covered with crystalline epicuticular waxes are known to be anti-adhesive, hardly wettable and preventing insect attachment. But there are insects that are capable of gluing their eggs to these surfaces by means of proteinaceous secretions. In this study, we analysed the bonding region between the eggs of Crioceris asparagi and the plant surface of Asparagus officinalis using light and cryo-scanning electron microscopy. The wettability of the plant surface by egg secretion was compared with that by Aqua Millipore water, aqueous sugar solution and chicken egg white. Furthermore, the force required to remove C. asparagi eggs from the plant surface was measured, in order to evaluate the egg's bonding strength. Mean pull-off force was 14.7 mN, which is about 8650 times higher than the egg weight. Egg glue was observed spreading over the wax crystal arrays on the plant cladophyll and wetting them. Similar wetting behaviour on the A. officinalis surface was observed for chicken egg white. Our results support the hypothesis that the mechanism of insect egg adhesion on micro- and nanostructured hydrophobic plant surfaces is related to the proteinaceous nature of adhesive secretions of insect eggs. The secretion wets superhydrophobic surfaces and after solidifying builds up a composite, consisting of the solidified glue and wax crystals, at the interface between the egg and plant cuticle. PMID:19923132

  15. Egg components, egg size, and hatchling size in leatherback turtles.

    Science.gov (United States)

    Wallace, Bryan P; Sotherland, Paul R; Tomillo, Pilar Santidrian; Bouchard, Sarah S; Reina, Richard D; Spotila, James R; Paladino, Frank V

    2006-12-01

    Relationships between egg size, egg components, and neonate size have been investigated across a wide range of oviparous taxa. Differences in egg traits among taxa reflect not only phylogenetic differences, but also interactions between biotic (i.e., maternal resource allocation) and abiotic (i.e. nest environment conditions) factors. We examined relationships between egg mass, egg composition, and hatchling size in leatherback turtles (Dermochelys coriacea) because of the unique egg and reproductive characteristics of this species and of sea turtles in general. Albumen comprised 63.0%+/-2.8% (mean+/-S.D.) of egg mass and explained most of the variation in egg mass, whereas yolk comprised only 33.0%+/-2.7%. Additionally, leatherback albumen dry mass was approximately 16% of albumen wet mass. Whereas hatchling mass increased significantly with egg mass (n = 218 clutches), hatchling mass increased by only approximately 2 g for each 10 g increase in egg mass and was approximately 10-20 g greater than yolk mass. Taken together, our results indicate that albumen might play a particularly significant role in leatherback embryonic development, and that leatherback eggs are both capable of water uptake from the nest substrate and also possess a large reservoir of water in the albumen. Relationships between egg mass and egg components, such as variation in egg mass being largely explained by variation in albumen mass and egg mass containing a relatively high proportion of albumen solids, are more similar to bird eggs than to eggs of other non-avian reptiles. However, hatchling mass correlates more with yolk mass than with albumen mass, unlike patterns observed in bird eggs of similar composition.

  16. Fall 1982 Retention Study.

    Science.gov (United States)

    Peralta Community Coll. District, Oakland, CA. Office of Research, Planning and Development.

    In fall 1982, a study was conducted in the Peralta Community College District (PCCD) using withdrawal and grade distribution data to analyze student retention patterns. Successful retention rates were based on the percentage of students who received a passing grade, while total retention rates were based on the percentage of students who received…

  17. Fall 1984 Retention Study.

    Science.gov (United States)

    Peralta Community Coll. District, Oakland, CA. Office of Research, Planning and Development.

    A study was conducted of the retention patterns of students enrolled in the Peralta Community College District (PCCD) in fall 1984 using college reports on withdrawals and grade distributions. The study focused on successful retention (i.e., all students who received a passing grade) and on total retention (i.e., all students who received any…

  18. Campylobacter jejuni in commercial eggs.

    Science.gov (United States)

    Fonseca, Belchiolina Beatriz; Beletti, Marcelo Emílio; de Melo, Roberta Torres; Mendonça, Eliane Pereira; Coelho, Letícia Ríspoli; Nalevaiko, Priscila Christen; Rossi, Daise Aparecida

    2014-01-01

    This study evaluated the ability of Campylobacter jejuni to penetrate through the pores of the shells of commercial eggs and colonize the interior of these eggs, which may become a risk factor for human infection. Furthermore, this study assessed the survival and viability of the bacteria in commercial eggs. The eggs were placed in contact with wood shavings infected with C. jejuni to check the passage of the bacteria. In parallel, the bacteria were inoculated directly into the air chamber to assess the viability in the egg yolk. To determine whether the albumen and egg fertility interferes with the entry and survival of bacteria, we used varying concentrations of albumen and SPF and commercial eggs. C. jejuni was recovered in SPF eggs (fertile) after three hours in contact with contaminated wood shavings but not in infertile commercial eggs. The colonies isolated in the SPF eggs were identified by multiplex PCR and the similarity between strains verified by RAPD-PCR. The bacteria grew in different concentrations of albumen in commercial and SPF eggs. We did not find C. jejuni in commercial eggs inoculated directly into the air chamber, but the bacteria were viable during all periods tested in the wood shavings. This study shows that consumption of commercial eggs infected with C. jejuni does not represent a potential risk to human health.

  19. Campylobacter jejuni in commercial eggs

    Directory of Open Access Journals (Sweden)

    Belchiolina Beatriz Fonseca

    2014-01-01

    Full Text Available This study evaluated the ability of Campylobacter jejuni to penetrate through the pores of the shells of commercial eggs and colonize the interior of these eggs, which may become a risk factor for human infection. Furthermore, this study assessed the survival and viability of the bacteria in commercial eggs. The eggs were placed in contact with wood shavings infected with C. jejuni to check the passage of the bacteria. In parallel, the bacteria were inoculated directly into the air chamber to assess the viability in the egg yolk. To determine whether the albumen and egg fertility interferes with the entry and survival of bacteria, we used varying concentrations of albumen and SPF and commercial eggs. C. jejuni was recovered in SPF eggs (fertile after three hours in contact with contaminated wood shavings but not in infertile commercial eggs. The colonies isolated in the SPF eggs were identified by multiplex PCR and the similarity between strains verified by RAPD-PCR. The bacteria grew in different concentrations of albumen in commercial and SPF eggs. We did not find C. jejuni in commercial eggs inoculated directly into the air chamber, but the bacteria were viable during all periods tested in the wood shavings. This study shows that consumption of commercial eggs infected with C. jejuni does not represent a potential risk to human health.

  20. Dual-Military Couples, Child Care and Retention

    Science.gov (United States)

    2016-04-01

    ACSC/Williams, Ja Rai A./AY16 1 AIR COMMAND AND STAFF COLLEGE AIR UNIVERSITY Dual-Military Couples, Child Care & Retention ... retention of one or both members of dual-military marriages significantly decreases after ten years of service. Among the military community, child...care issues most negatively affected the retention decisions of members of dual-military marriages. The Air Force should place an emphasis on

  1. A Critical Look at Military Recruitment and Retention Policies

    Science.gov (United States)

    1985-03-01

    randomness in the attrition and reenlistment behavior of individual enlistees. The basis for these techniques is the retention function, which describes the...random) length of service of an individual enlistee. Policy analysis requires comparison of the aggresate effects of particular retention patterns...that might change enlistment and retentiOn behavior . The short-term effects of such changes critically depend on the initial condition; (force

  2. The fish egg microbiome

    NARCIS (Netherlands)

    Liu, Y.

    2016-01-01

    Y. Liu

    Prof. dr. F. Govers (promotor); Prof. dr. J.M. Raaijmakers (promotor); Dr. I. de Bruijn (co-promotor); Wageningen University, 13 June 2016, 170 pp.

    The fish egg microbiome: diversity and activity against the oomycete pathogen

  3. A comparative study of the retention and lethality of the first and second generation arthropod protein markers

    Science.gov (United States)

    A greenhouse study was conducted that compared the protein mark retention time of a well established rabbit IgG protein detection protocol with those of three newer, less expensive protein detection protocols designed to detect casein in bovine milk, egg albumin in chicken egg whites, and soy tryp...

  4. Making Student Retention an Institutional Priority.

    Science.gov (United States)

    Sydow, Debbie L.; Sandel, Robert H.

    1998-01-01

    Describes a study conducted to determine the reasons behind the high rate of student attrition at Mountain Empire Community College in Virginia. Work demands and family conflicts were found to be the primary causes of drop out, conclusions that led to the formation of a task force and a student retention plan to improve persistence. (KC)

  5. [Contributions of edentulous mandibular alveolar ridge height and denture adhesive to complete denture retention].

    Science.gov (United States)

    Zeng, Xingqi; Chen, Xinmin; Peng, Yan; Xu, Chao; Men, Qinglin

    2011-10-01

    The present paper is to investigate the relationship between height and stress-bearing area of mandibular alveolar ridge, their influence on retention of complete denture, and the effectiveness of denture adhesive (DA). Five mandibular edentulous models of different heights and a rabbit palate model were prepared in Die-Stone. Measurements were made on the heights and stress-bearing areas of mandibular alveolar ridge, the retention force of mandibular models 15 min after DA administration, and the retention force on the rabbit palate before and after adhering. All available data were analyzed statistically. Linear regression relationship was demonstrated between ridge height and bearing area, ridge height and retention force, and bearing area and retention force (Pridge directly correlate with the retention of complete denture, and DA significantly improves the retention ability of complete denture.

  6. The Walking Egg non-profit organisation.

    Science.gov (United States)

    Dhont, N

    2011-01-01

    The Walking Egg non-profit organisation (npo) was founded in 2010 by scientists and an artist to realise the Arusha Project which strives to implement accessible infertility programmes in resource-poor countries. Right from the start The Walking Egg has opted for a multidisciplinary and global approach towards the problem of infertility and in cooperation with the Special Task Force (STF) on "Developing countries and infertility" of the European Society of Human reproduction and Embryology (ESHRE) and the WHO, it gathers medical, social and economical scientists and experts along with artists to discuss and work together towards its goal. The project aims to raise awareness -surrounding childlessness in resource-poor countries and to make infertility care in all its aspects, including assisted reproductive technologies, available and accessible for a much larger part of the population.

  7. Animal welfare and eggs

    DEFF Research Database (Denmark)

    Andersen, Laura Mørch

    This paper identifies revealed willingness to pay for animal welfare using a panel mixed logit model allowing for correlation between willingness to pay for different types of production. We utilize a unique household level panel, combining real purchases with survey data on perceived public...... and private good attributes of different types of eggs. We find that the estimated correlations are consistent with the levels of animal welfare, and that consumers perceiving a stronger connection between animal welfare and the organic label have higher willingness to pay for organic eggs, even when we...... control for private good attributes such as food safety also connected to the label. Our results suggest that altruistic motives may play an important role in the demand for agricultural products....

  8. Mechanistic failure mode investigation and resolution of parvovirus retentive filters.

    Science.gov (United States)

    LaCasse, Daniel; Lute, Scott; Fiadeiro, Marcus; Basha, Jonida; Stork, Matthew; Brorson, Kurt; Godavarti, Ranga; Gallo, Chris

    2016-07-08

    Virus retentive filters are a key product safety measure for biopharmaceuticals. A simplistic perception is that they function solely based on a size-based particle removal mechanism of mechanical sieving and retention of particles based on their hydrodynamic size. Recent observations have revealed a more nuanced picture, indicating that changes in viral particle retention can result from process pressure and/or flow interruptions. In this study, a mechanistic investigation was performed to help identify a potential mechanism leading to the reported reduced particle retention in small virus filters. Permeate flow rate or permeate driving force were varied and analyzed for their impact on particle retention in three commercially available small virus retentive filters. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:959-970, 2016. © 2016 American Institute of Chemical Engineers.

  9. Egg Phospholipids and Cardiovascular Health

    Directory of Open Access Journals (Sweden)

    Christopher N. Blesso

    2015-04-01

    Full Text Available Eggs are a major source of phospholipids (PL in the Western diet. Dietary PL have emerged as a potential source of bioactive lipids that may have widespread effects on pathways related to inflammation, cholesterol metabolism, and high-density lipoprotein (HDL function. Based on pre-clinical studies, egg phosphatidylcholine (PC and sphingomyelin appear to regulate cholesterol absorption and inflammation. In clinical studies, egg PL intake is associated with beneficial changes in biomarkers related to HDL reverse cholesterol transport. Recently, egg PC was shown to be a substrate for the generation of trimethylamine N-oxide (TMAO, a gut microbe-dependent metabolite associated with increased cardiovascular disease (CVD risk. More research is warranted to examine potential serum TMAO responses with chronic egg ingestion and in different populations, such as diabetics. In this review, the recent basic science, clinical, and epidemiological findings examining egg PL intake and risk of CVD are summarized.

  10. Egg Phospholipids and Cardiovascular Health

    Science.gov (United States)

    Blesso, Christopher N.

    2015-01-01

    Eggs are a major source of phospholipids (PL) in the Western diet. Dietary PL have emerged as a potential source of bioactive lipids that may have widespread effects on pathways related to inflammation, cholesterol metabolism, and high-density lipoprotein (HDL) function. Based on pre-clinical studies, egg phosphatidylcholine (PC) and sphingomyelin appear to regulate cholesterol absorption and inflammation. In clinical studies, egg PL intake is associated with beneficial changes in biomarkers related to HDL reverse cholesterol transport. Recently, egg PC was shown to be a substrate for the generation of trimethylamine N-oxide (TMAO), a gut microbe-dependent metabolite associated with increased cardiovascular disease (CVD) risk. More research is warranted to examine potential serum TMAO responses with chronic egg ingestion and in different populations, such as diabetics. In this review, the recent basic science, clinical, and epidemiological findings examining egg PL intake and risk of CVD are summarized. PMID:25871489

  11. Colloid retention in porous media: mechanistic confirmation of wedging and retention in zones of flow stagnation.

    Science.gov (United States)

    Johnson, W P; Li, Xiqing; Yal, Gozde

    2007-02-15

    A three-dimensional particle tracking model for colloid transport in porous media was developed that predicts colloid retention in porous media in the presence of an energy barrier via two mechanisms: (1) wedging of colloids within grain to grain contacts; (2) retention of colloids (without attachment) in flow stagnation zones. The model integrates forces experienced by colloids during transport in porous media, i.e., fluid drag, gravity, diffusion, and colloid-surface Derjaguin-Landau-Verwey-Overbeek interactions. The model was implemented for a fluid flow field that explicitly represented grain to grain contacts. The model utilized a variable time stepping routine to allow finer time steps in zones of rapid change in fluid velocity and colloid-surface interaction forces. Wedging was favored by colloid: collector ratios greater than about 0.005, with this threshold ratio increasing with decreasing fluid velocity. Retention in flow stagnation zones was demonstrated for colloid: collector ratios less than about 0.005, with this threshold decreasing with increasing fluid velocity. Both wedging and retention in flow stagnation zones were sensitive to colloid-surface interaction forces (energy barrier height and secondary energy minimum depth). The model provides a mechanistic basis for colloid retention in the presence of an energy barrier via processes that were recently hypothesized to explain experimental observations.

  12. Irradiation of liquid egg, frozen egg, powdered egg, egg yolk and white of egg: reducing the population of Salmonella enteritidis and sensory aspects and physico-chemical

    International Nuclear Information System (INIS)

    Froehlich, Angela

    2004-01-01

    Eggs and their products have been incriminated in foodborne disease outbreaks due to Salmonella enteritidis contamination. Irradiation is a food preservation technology that could be applied to minimize the problem. The aim of this study was to determine the effect of irradiation in liquid and frozen egg as well as in powdered egg, egg yolk and egg white spiked with Salmonella enteritidis. Spiked samples of liquid egg, egg white and egg yolk were exposed to 0,5; 1,0; 1,5; 2,0; 2,5; 3,0 kGy and spiked samples of frozen and powdered egg were exposed to 0,5; 1,0; 1,5; 2,0; 2,5; 3,0; 3,5 e 4,0 kGy. Raw odour, cooked odour and taste of non inoculated and irradiated samples and non irradiated samples of egg and egg products were analysed by a trained penal. Viscosity and lipid oxidation (malonaldehyde concentration) were also determined. Doses of 2,0; 3,0; 3,5; 3,0 e 3,5 kGy reduced in 5 log the population of S. Enteritidis in liquid and frozen egg, powdered egg yolk, egg white and egg, respectively, with moderate alterations in relation to non irradiated samples detected by the trained penal. Viscosity and lipid oxidation in the powdered products, however, showed more intense alterations. Therefore, irradiation can be considered a feasible process for liquid and frozen egg while when applied to powdered products it should be considered the type of food product to which they will be added due to alterations in viscosity. (author)

  13. Urinary retention in women.

    Science.gov (United States)

    Juma, Saad

    2014-07-01

    This review is a summary of the most pertinent published studies in the literature in the last 18 months that address cause, diagnosis, and management of urinary retention in women. Symptoms, uroflow, and pressure-flow studies have a low predictive value for and do not correlate with elevated postvoid residual urine (PVR). Anterior and posterior colporrhaphy do not cause de-novo bladder outlet obstruction in the majority of patients with elevated PVR, and the cause of elevated PVR may be other factors such as pain or anxiety causing abnormal relaxation of the pelvic floor and contributing to voiding difficulty. The risk of urinary retention in a future pregnancy after mid-urethral sling (MUS) is small. The risk of urinary tract infection and urinary retention after chemodenervation of the bladder with onabotulinumtoxin-A (100 IU) in patients with non-neurogenic urge incontinence is 33 and 5%, respectively. There is a lack of consensus among experts on the timing of sling takedown in the management of acute urinary retention following MUS procedures. There has been a significant progress in the understanding of the causation of urinary retention. Important areas that need further research (basic and clinical) are post-MUS and pelvic organ prolapse repair urinary retention and obstruction, and urinary retention owing to detrusor underactivity.

  14. A new approach to analyze the dynamic strength of eggs

    Czech Academy of Sciences Publication Activity Database

    Trnka, Jan; Nedomová, Š.; Kumbár, V.; Šustr, M.; Buchar, J.

    2016-01-01

    Roč. 42, č. 4 (2016), s. 525-537 ISSN 0092-0606 Institutional support: RVO:61388998 Keywords : eggs * compression * dynamic loading * HSPB technique * rupture force Subject RIV: BO - Biophysics Impact factor: 1.241, year: 2016 http://link.springer.com/journal/10867

  15. Behaviour of Japanese Quail Eggs Under Mechanical Compression

    Czech Academy of Sciences Publication Activity Database

    Buchar, J.; Nedomová, Š.; Trnka, Jan; Strnková, J.

    2015-01-01

    Roč. 18, č. 5 (2015), s. 1110-1118 ISSN 1094-2912 Institutional support: RVO:61388998 Keywords : quail egg * compression * rupture force Subject RIV: GM - Food Processing Impact factor: 1.586, year: 2015 http://www.tandfonline.com/doi/abs/10.1080/10942912.2013.862634#.VNI0aC7z_PM

  16. Allergens from fish and egg

    DEFF Research Database (Denmark)

    Poulsen, Lars K.; Hansen, T K; Nørgaard, A

    2001-01-01

    Allergens from fish and egg belong to some of the most frequent causes of food allergic reactions reported in the literature. Egg allergens have been described in both white and yolk, and the egg white proteins ovomucoid, ovalbumin, ovotransferrin and lysozyme have been adopted in the allergen...... nomenclature as Gal d1-d4. The most reported allergen from egg yolk seems to be alpha-livitin. In fish, the dominating allergen is the homologues of Gad c1 from cod, formerly described as protein M. A close cross-reactivity exists within different species of fish between this calcium-binding protein family...

  17. Phospholipids, Dietary Supplements, and Chicken Eggs: An Inquiry-Based Exercise Using Thin-Layer Chromatography

    Science.gov (United States)

    Potteiger, Sara E.; Belanger, Julie M.

    2015-01-01

    This inquiry-based experiment is designed for organic or biochemistry undergraduate students to deduce the identity of phospholipids extracted from chicken eggs and dietary supplements. This is achieved using thin-layer chromatography (TLC) data, a series of guided questions of increasing complexity, and provided relative retention factor (Rf)…

  18. [Chronic monstrous urine retention].

    Science.gov (United States)

    Thomsen, Frederik Gustav; Holm, Mette Lind

    2015-01-26

    A 75-year-old male was diagnosed with renal mass at a computed tomography during an examination for extended abdominal girth. A large mesenterical cyst was also detected. The patient had infrequent voiding, which he had trained over many years as a taxi driver. A basic physical examination led to suspect urinary retention. His creatinine level was normal and he had no hydronephrosis. A renography showed equal function, but prolonged bilateral outflow. The volume extracted by urethral catheter passed 15 l. Absence of hydronephrosis and normal S-creatinine level has not been described in chronic urinary retention of this extent. Hydronephrosis is seen, but in much smaller volume of retention. Infrequent voiding is easily diagnosed. Urinary retention should be suspected when finding median cystic processes.

  19. Liquid Effluent Retention Facility

    Data.gov (United States)

    Federal Laboratory Consortium — The Liquid Effluent Retention Facility (LERF) is located in the central part of the Hanford Site. LERF is permitted by the State of Washington and has three liquid...

  20. Drug Retention Times

    Energy Technology Data Exchange (ETDEWEB)

    Center for Human Reliability Studies

    2007-05-01

    The purpose of this monograph is to provide information on drug retention times in the human body. The information provided is based on plausible illegal drug use activities that might be engaged in by a recreational drug user.

  1. Egg temperature and embryonic metabolism of A- and B-eggs of ...

    African Journals Online (AJOL)

    Macaroni and rockhopper penguins lay two eggs but rear only one chick to independence. The eggs are markedly dimorphic in size and, although the smaller A-egg is laid several days before the B-egg, in nests where both eggs are incubated, the B-egg always hatches first. Incubation temperatures and embryonic oxygen ...

  2. Eggs and Health Special Issue

    Directory of Open Access Journals (Sweden)

    Maria Luz Fernandez

    2016-12-01

    Full Text Available In 1968, the American Heart Association recommended the consumption of no more than 300 mg/day of dietary cholesterol and emphasized that no more than 3 eggs should be eaten per week, resulting in substantial reductions in egg consumption, not just by diseased populations but alsobyhealthyindividuals,andmoreimportantlybypoorcommunitiesinundevelopedcountieswho were advised against consuming a highly nutritious food.[...

  3. Eggspectation : organic egg verification tool

    NARCIS (Netherlands)

    Ruth, van S.M.; Hoogenboom, L.A.P.

    2011-01-01

    In 2009 RIKILT conducted a study on about 2,000 eggs to evaluate three different analytical verification methods: carotenoid profiling, fatty acid profiling and isotope ratio mass spectrometry. The eggs were collected from about 50 Dutch farms. The selection was based on the farms’ location and

  4. Egg dumping by predatory insects

    Czech Academy of Sciences Publication Activity Database

    Corbani, A. C.; Ferrer, A.; Dixon, Anthony F. G.; Hemptinne, J. L.

    2011-01-01

    Roč. 36, č. 3 (2011), s. 290-293 ISSN 0307-6962 Institutional research plan: CEZ:AV0Z60870520 Keywords : Egg dumping * ladybird beetles * oocyte resorption * trophic egg Subject RIV: EH - Ecology, Behaviour Impact factor: 1.330, year: 2011

  5. Chromium in kale, wheat, and eggs: intrinsic labeling and bioavailability to rats

    International Nuclear Information System (INIS)

    Johnson, C.D.; Weaver, C.M.

    1986-01-01

    Retention of 51 Cr was measured in rats fed 3-g test meals containing 63% sucrose, 10% corn oil, and 27% of a test food radiolabeled intrinsically or extrinsically. The test foods were egg yolk, kale, and wheat radiolabeled intrinsically and egg yolk, kale, wheat, and casein radiolabeled extrinsically. Five-week-old male rats were fed a Cr-deficient semisynthetic diet for 2 weeks prior to and 9 days following the 3-g test meals containing 51 Cr-labeled foods. By day 9, only 1.1-2.3% of the 51 Cr in the test meal remained in the animal. Retention of 51 Cr from casein (2.3%) was not significantly different from retention from egg yolk (1.7%) but was significantly higher than that from kale (1.1%) and from wheat (1.5%). These differences may have reflected dietary Cr content rather than a difference in form. There were no significant differences in the retention of 51 Cr due to method of labeling. Preparation of foods intrinsically labeled with 51 Cr was difficult because of a root-shoot barrier in the case of plants and poor absorption or tissue retention by animals. Several approaches to endogenous labeling were attempted. An aqueous extract of kale subjected to gel permeation chromatography showed a low molecular weight chromium complex similar to that found in alfalfa. (M/sub r/ 2900)

  6. Egg shell treatment methods effect on commercial eggs quality

    Directory of Open Access Journals (Sweden)

    Dayane Santos de Almeida

    2015-01-01

    Full Text Available ABSTRACT:The objective was to evaluate commercial eggs quality after being subjected to a cleaning process and immersion in whey protein concentrate (WPC as a function of storage time. The experimental design was completely randomized in a factorial 4x7, being four methods of treating shell (not cleaned and not coated with WPC, not cleaned and coated with WPC, cleaned and not coated with WPC, cleaned and coated with WPC and seven periods of storage (1, 7, 14, 21, 28, 35 and 42 days for a total of 28 treatments, with five replicates of four eggs each. Quality parameters evaluated were weight loss of eggs (%, specific gravity (g/cm3, haugh units (HU, yolk index (YI and potential hydrogen (pH albumen. The storage period increase, regardless of the shell treatment method, causing weight loss in eggs, reductions in specific gravity in the Haugh units, yolk index and increase in the albumen pH. The cleaning method makes egg's internal quality worse during storage. Coverage of whey protein concentrate is a viable alternative for commercial eggs conservation stored at room temperature in order to minimize quality loss during storage, including eggs that need to go through the cleaning process.

  7. Comparative study of retentive anchor systems for overdentures.

    Science.gov (United States)

    Svetlize, Carlos A; Bodereau, Enrique Fernández

    2004-06-01

    This study aimed to evaluate the retention on two or four implants of eight resilient and nonresilient retentive anchors used in overdentures. Eight groups of retentive anchors were used: Dyna and Shiner (magnets); Dalla Bona and O-Ring (balls); Ceka Revax and Zaag attachments (studs); the cast bar (Dolder type) system with plastic clips; and the milled bars system. These specimens with their respective overdentures were prepared on two similar acrylic resin models with four implants (3.75 x 13 mm). Ten tensile strength tests (Instron) were performed on each group at a speed of 3 mm per minute. The statistical analysis (one-way analysis of variance, Tukey's HSD test) was considered significant. The pull force values ranged between 0.400 and 3.800 daN (International System of Units). There was a significant difference in retention in favor of the milled bars in comparison with the Ceka Revax, Hader bars, Zaag attachments, O-Ring, and Dyna groups, and a marginally significant difference compared with the Dalla Bona group. There was a highly significant difference with the Shiner magnets. The milled bar system was the most retentive anchor, with the Dalla Bona, Ceka Revax, Hader Bar, Zaag attachment, and O-Ring groups being the second most retentive. The least retentive groups were the Shiner and Dyna magnets. Proper abutment placement in the mandible and the correct selection of the retentive anchor will improve overdenture retention.

  8. Regulation of egg quality and lipids metabolism by Zinc Oxide Nanoparticles.

    Science.gov (United States)

    Zhao, Yong; Li, Lan; Zhang, Peng-Fei; Liu, Xin-Qi; Zhang, Wei-Dong; Ding, Zhao-Peng; Wang, Shi-Wen; Shen, Wei; Min, Ling-Jiang; Hao, Zhi-Hui

    2016-04-01

    This investigation was designed to explore the effects of Zinc Oxide Nanoparticles (ZnO NP) on egg quality and the mechanism of decreasing of yolk lipids. Different concentration of ZnO NP and ZnSO4 were used to treat hens for 24 weeks. The body weight and egg laying frequency were recorded and analyzed. Albumen height, Haugh unit, and yolk color score were analyzed by an Egg Multi Tester. Breaking strength was determined by an Egg Force Reader. Egg shell thickness was measured using an Egg Shell Thickness Gouge. Shell color was detected by a spectrophotometer. Egg shape index was measured by Egg Form Coefficient Measuring Instrument. Albumen and yolk protein was determined by the Kjeldahl method. Amino acids were determined by an amino acids analyzer. Trace elements Zn, Fe, Cu, and P (mg/kg wet mass) were determined in digested solutions using Inductively Coupled Plasma-Optical Emission Spectrometry. TC and TG were measured using commercial analytical kits. Yolk triglyceride, total cholesterol, pancreatic lipase, and phospholipids were determined by appropriate kits. β-carotene was determined by spectrophotometry. Lipid metabolism was also investigated with liver, plasma, and ovary samples. ZnO NP did not change the body weight of hens during the treatment period. ZnO NP slowed down egg laying frequency at the beginning of egg laying period but not at later time. ZnO NP did not affect egg protein or water contents, slightly decreased egg physical parameters (12 to 30%) and trace elements (20 to 35%) after 24 weeks treatment. However, yolk lipids content were significantly decreased by ZnO NP (20 to 35%). The mechanism of Zinc oxide nanoparticles decreasing yolk lipids was that they decreased the synthesis of lipids and increased lipid digestion. These data suggested ZnO NP affected egg quality and specifically regulated lipids metabolism in hens through altering the function of hen's ovary and liver. © 2016 Poultry Science Association Inc.

  9. An Alternate, Egg-Free Radiolabeled Meal Formulation for Gastric-Emptying Scintigraphy.

    Science.gov (United States)

    Garrigue, Philippe; Bodin-Hullin, Aurore; Gonzalez, Sandra; Sala, Quentin; Guillet, Benjamin

    2017-07-01

    Tc-radiolabeled scrambled eggs (SEs) are most often used as the ingested solid phase for gastric-emptying scintigraphy, leading egg-reluctant patients to avoid the examination. We formulated and validated 2 egg-free alternate meals, in the absence of any commercialized formulation: chocolate mug cake (MC) and scrambled tofu (ST). Six healthy volunteers underwent gastric-emptying scintigraphy after ingesting Tc-radiolabeled MC, ST, or SE. Gastric retention indexes did not change significantly between formulations (% of overtime variation to SE: MC 7.75% ± 7.1%, ST 7.17% ± 5.8%; P = 0.6618, not statistically significant), suggesting MC and ST as interesting egg-free alternatives.

  10. The effect of the egg's shape on the stress distribution in the eggshell at internal pressure loading

    Directory of Open Access Journals (Sweden)

    Šárka Nedomová

    2007-01-01

    Full Text Available The influence of the eggshell shape on the stress distribution under internal pressure is studied. A mathematical description of the hen's eggshell is proposed. The analytical expressions for the membrane solution are presented. Obtained results are used for the evaluation of a set of domestic hen's eggs. 28 eggs were analysed in this study. The weight of eggs ranged from 49.55 g to 61.08 g, the egg shape ranged from 72.82 % to 84.94 %, the average eggshell thickness ranged from 0.343 to 0.433 mm. The eggshell strength is given namely by the maximum values both of meridian and circumferential forces. The dependence of the meridian force maximum on the egg shape index has some tendency to increase with egg shape index. The outlined linear dependence is very weak, the coefficient of correlation is about 0.45.

  11. Egg to Fry - Chinook Egg-to-Fry Survival

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Few estimates of Chinook egg-to-fry survival exist despite the fact that this is thought to be one of the life stages limiting production of many listed Chinook...

  12. Immunologic changes in children with egg allergy ingesting extensively heated egg.

    Science.gov (United States)

    Lemon-Mulé, Heather; Sampson, Hugh A; Sicherer, Scott H; Shreffler, Wayne G; Noone, Sally; Nowak-Wegrzyn, Anna

    2008-11-01

    Prior studies have suggested that heated egg might be tolerated by some children with egg allergy. We sought to confirm tolerance of heated egg in a subset of children with egg allergy, to evaluate clinical and immunologic predictors of heated egg tolerance, to characterize immunologic changes associated with continued ingestion of heated egg, and to determine whether a diet incorporating heated egg is well tolerated. Subjects with documented IgE-mediated egg allergy underwent physician-supervised oral food challenges to extensively heated egg (in the form of a muffin and a waffle), with tolerant subjects also undergoing regular egg challenges (in a form of scrambled egg or French toast). Heated egg-tolerant subjects incorporated heated egg into their diets. Skin prick test wheal diameters and egg white, ovalbumin, and ovomucoid IgE levels, as well as ovalbumin and ovomucoid IgG4 levels, were measured at baseline for all subjects and at 3, 6, and 12 months for those tolerant of heated egg. Sixty-four of 117 subjects tolerated heated egg, 23 tolerated regular egg, and 27 reacted to heated egg. Heated egg-reactive subjects had larger skin test wheals and greater egg white-specific, ovalbumin-specific, and ovomucoid-specific IgE levels compared with heated egg- and egg-tolerant subjects. Continued ingestion of heated egg was associated with decreased skin test wheal diameters and ovalbumin-specific IgE levels and increased ovalbumin-specific and ovomucoid-specific IgG4 levels. The majority of subjects with egg allergy were tolerant of heated egg. Continued ingestion of heated egg was well tolerated and associated with immunologic changes that paralleled the changes observed with the development of clinical tolerance to regular egg.

  13. Allergens from fish and egg

    DEFF Research Database (Denmark)

    Poulsen, Lars K.; Hansen, T K; Nørgaard, A

    2001-01-01

    , denominated the parvalbumins. This cross-reactivity has been indicated to be of clinical relevance for several species, since patients with a positive double-blind, placebo-controlled food challenge to cod will also react with other fish species, such as herring, plaice and mackerel. In spite......Allergens from fish and egg belong to some of the most frequent causes of food allergic reactions reported in the literature. Egg allergens have been described in both white and yolk, and the egg white proteins ovomucoid, ovalbumin, ovotransferrin and lysozyme have been adopted in the allergen...... nomenclature as Gal d1-d4. The most reported allergen from egg yolk seems to be alpha-livitin. In fish, the dominating allergen is the homologues of Gad c1 from cod, formerly described as protein M. A close cross-reactivity exists within different species of fish between this calcium-binding protein family...

  14. Effect of Proteolytic Modification on Texture and Mastication of Heat-Treated Egg White Gels.

    Science.gov (United States)

    Funaki, Junko; Minami, Michiko; Abe, Sachie; Ueda, Reiko; Eto, Wakako; Kugino, Kenji; Kugino, Mutsuko; Abe, Keiko; Toko, Kiyoshi; Asakura, Tomiko

    2017-02-01

    Raw egg white undergoes sol-gel transition by heat treatment, which changes it to an elastic gel. Here, protease treatment to render a new texture to heated egg white gel was applied. Protease-treated gels exhibited ductile flow without obvious rupture points. Transmission electron microscopy analysis showed that in protease-treated gels, protein aggregates were distributed more homogeneously compared with that observed in the untreated control, probably because ovalbumin was digested into small peptides as revealed by SDS-PAGE. The properties of the gel were evaluated by sensory tests and by measuring the movement of the masseter muscle, using surface electromyography. Results showed that maximum bite force and mastication duration were decreased for the protease-treated gels, which were evaluated as being softer, smoother, less elastic and better textured. Overall, our results indicate that protease-treated egg white gel has superior qualities and is easier to swallow than the untreated gel. In the food industry, the use of egg white is limited compared with that of egg yolk and whole eggs. In this study, we performed protease treatment to generate a new food material with smoother and softer texture compared with heat treated egg white. Our findings may expand the consumption of egg white, which can be consumed by people with mastication and swallowing disorders, and reduce the waste of egg white as a surplus product.

  15. A novel method of rejection of brood parasitic eggs reduces parasitism intensity in a cowbird host.

    Science.gov (United States)

    De Mársico, María C; Gloag, Ros; Ursino, Cynthia A; Reboreda, Juan C

    2013-06-23

    The hosts of brood parasitic birds are under strong selection pressure to recognize and remove foreign eggs from their nests, but parasite eggs may be too large to be grasped whole and too strong to be readily pierced by the host's bill. Such operating constraints on egg removal are proposed to force some hosts to accept parasite eggs, as the costs of deserting parasitized clutches can outweigh the cost of rearing parasites. By fitting microcameras inside nests, we reveal that the Neotropical baywing (Agelaioides badius), a host of the screaming cowbird (Molothrus rufoaxillaris) and shiny cowbird (Molothrus bonariensis), instead circumvents such constraints by kicking parasite eggs out of the nest. To our knowledge, this is the first report of a passerine bird using its feet to remove objects from the nest. Kick-ejection was an all-or-nothing response. Baywings kick-ejected parasite eggs laid before their own first egg and, if heavily parasitized, they ejected entire clutches and began again in the same nest. Few baywings were able to rid their nests of every parasite egg, but their novel ejection method allowed them to reduce the median parasitism intensity by 75 per cent (from four to one cowbird eggs per nest), providing an effective anti-parasite defence.

  16. Data on Retention

    NARCIS (Netherlands)

    van Wanrooij, Ward; Pras, Aiko; Schönwälder, Jürgen; Serrat, Joan

    2005-01-01

    Proposed EU regulations on data retention could require every provider to keep accounting logs of its customers Internet usage. Although the technical consequences of these requirements have been investigated by consultancy companies, this paper investigates what this accounting data could be, how

  17. Tritium retention in TFTR

    Energy Technology Data Exchange (ETDEWEB)

    Dylla, H.F.; Wilson, K.L. (eds.)

    1988-04-01

    This report discusses the materials physics related to D-T operation in TFTR. Research activities are described pertaining to basic studies of hydrogenic retention in graphite, hydrogen recycling phenomena, first-wall and limiter conditioning, surface analysis of TFTR first-wall components, and estimates of the tritium inventory.

  18. 9 CFR 590.410 - Shell eggs and egg products required to be labeled.

    Science.gov (United States)

    2010-01-01

    ... 9 Animals and Animal Products 2 2010-01-01 2010-01-01 false Shell eggs and egg products required... INSPECTION ACT) Identifying and Marking Product § 590.410 Shell eggs and egg products required to be labeled. (a) All shell eggs packed into containers destined for the ultimate consumer shall be labeled to...

  19. Ovomucoid Is Not Superior to Egg White Testing in Predicting Tolerance to Baked Egg

    Science.gov (United States)

    Bartnikas, Lisa M.; Sheehan, William J.; Larabee, Katherine S.; Petty, Carter; Schneider, Lynda C.; Phipatanakul, Wanda

    2013-01-01

    BACKGROUND Children with egg allergy may tolerate baked egg products. Ovomucoid specific IgE (sIgE) antibody levels have been suggested to predict outcomes of baked egg challenges. OBJECTIVE We determined the relationship of ovomucoid and egg white sIgE levels and egg white skin prick test (SPT) wheal size with baked egg challenge outcome. METHODS Retrospective review of 1186 patients who underwent ovomucoid sIgE blood testing. Subset analysis was of 169 patients who underwent baked egg food challenges. RESULTS Egg white sIgE, ovomucoid sIgE, and egg white SPT were different among those eating regular egg, eating baked egg only, or avoiding all egg (P egg challenges. We were able to establish >90% predictive values for passing baked egg challenge for egg white sIgE, ovomucoid sIgE, and egg white SPT. No patient with egg white SPT wheal egg challenge. Receiver operating characteristic curve analysis of egg white sIgE, ovomucoid sIgE, and egg white SPT showed areas under the curve of 0.721, 0.645, and 0.624, respectively. No significant difference was observed among these immunologic parameters in their abilities to predict baked egg challenge outcome (P = .301). CONCLUSION Most children with egg allergy in this study passed baked egg challenges. Ovomucoid sIgE, although a useful clinical predictor of baked egg tolerance, was not superior to egg white SPT or sIgE in predicting outcome of baked egg challenge. PMID:24013255

  20. It’s what’s inside that counts: Egg contaminant concentrations are influenced by estimates of egg density, egg volume, and fresh egg mass

    Science.gov (United States)

    Herzog, Mark; Ackerman, Joshua T.; Eagles-Smith, Collin A.; Hartman, Christopher

    2016-01-01

    In egg contaminant studies, it is necessary to calculate egg contaminant concentrations on a fresh wet weight basis and this requires accurate estimates of egg density and egg volume. We show that the inclusion or exclusion of the eggshell can influence egg contaminant concentrations, and we provide estimates of egg density (both with and without the eggshell) and egg-shape coefficients (used to estimate egg volume from egg morphometrics) for American avocet (Recurvirostra americana), black-necked stilt (Himantopus mexicanus), and Forster’s tern (Sterna forsteri). Egg densities (g/cm3) estimated for whole eggs (1.056 ± 0.003) were higher than egg densities estimated for egg contents (1.024 ± 0.001), and were 1.059 ± 0.001 and 1.025 ± 0.001 for avocets, 1.056 ± 0.001 and 1.023 ± 0.001 for stilts, and 1.053 ± 0.002 and 1.025 ± 0.002 for terns. The egg-shape coefficients for egg volume (K v ) and egg mass (K w ) also differed depending on whether the eggshell was included (K v = 0.491 ± 0.001; K w = 0.518 ± 0.001) or excluded (K v = 0.493 ± 0.001; K w = 0.505 ± 0.001), and varied among species. Although egg contaminant concentrations are rarely meant to include the eggshell, we show that the typical inclusion of the eggshell in egg density and egg volume estimates results in egg contaminant concentrations being underestimated by 6–13 %. Our results demonstrate that the inclusion of the eggshell significantly influences estimates of egg density, egg volume, and fresh egg mass, which leads to egg contaminant concentrations that are biased low. We suggest that egg contaminant concentrations be calculated on a fresh wet weight basis using only internal egg-content densities, volumes, and masses appropriate for the species. For the three waterbirds in our study, these corrected coefficients are 1.024 ± 0.001 for egg density, 0.493 ± 0.001 for K v , and 0.505 ± 0.001 for K w .

  1. phosphorus retention data and metadata

    Data.gov (United States)

    U.S. Environmental Protection Agency — phosphorus retention in wetlands data and metadata. This dataset is associated with the following publication: Lane , C., and B. Autrey. Phosphorus retention of...

  2. Retention Measures and Reporting Systems

    National Research Council Canada - National Science Library

    Ropp, Gary

    2003-01-01

    ...) and performed by the Navy Personnel Research and Development Center (NPRDC) to: (1) review current retention measures in use in the Navy, as well as the system used to distribute retention statistics, and (2...

  3. Helmint eggs elimination performance during lammelar settling and sand filters in Beniel WWTP (Murcia, Spain); Rendimiento en la eliminacion de huevos de helminto en la decantacion lamelar y filtracion por arena en la EDAR de Beniel (Murcia)

    Energy Technology Data Exchange (ETDEWEB)

    Simon Andreu, P. J.; Cardin Mifsut, C.; Pacheco Ballarin, S.; Martinez Muro, M. A.; Vicente Gonzalez, J. A.; Llosar Llacer, C.

    2010-07-01

    With this study, it was observed Ascaris suum eggs elimination yield of tertiary treatment in Beniel wastewater treatment plant (WWTP) in Murcia Region (Spain). It was inoculated a sample of Ascaris suum eggs in the treatment in maximum flow conditions and it was calculated the retention yield of the lamellar settling and sand filters. (Author) 3 refs.

  4. Soil Water Retention Curve

    Science.gov (United States)

    Johnson, L. E.; Kim, J.; Cifelli, R.; Chandra, C. V.

    2016-12-01

    Potential water retention, S, is one of parameters commonly used in hydrologic modeling for soil moisture accounting. Physically, S indicates total amount of water which can be stored in soil and is expressed in units of depth. S can be represented as a change of soil moisture content and in this context is commonly used to estimate direct runoff, especially in the Soil Conservation Service (SCS) curve number (CN) method. Generally, the lumped and the distributed hydrologic models can easily use the SCS-CN method to estimate direct runoff. Changes in potential water retention have been used in previous SCS-CN studies; however, these studies have focused on long-term hydrologic simulations where S is allowed to vary at the daily time scale. While useful for hydrologic events that span multiple days, the resolution is too coarse for short-term applications such as flash flood events where S may not recover its full potential. In this study, a new method for estimating a time-variable potential water retention at hourly time-scales is presented. The methodology is applied for the Napa River basin, California. The streamflow gage at St Helena, located in the upper reaches of the basin, is used as the control gage site to evaluate the model performance as it is has minimal influences by reservoirs and diversions. Rainfall events from 2011 to 2012 are used for estimating the event-based SCS CN to transfer to S. As a result, we have derived the potential water retention curve and it is classified into three sections depending on the relative change in S. The first is a negative slope section arising from the difference in the rate of moving water through the soil column, the second is a zero change section representing the initial recovery the potential water retention, and the third is a positive change section representing the full recovery of the potential water retention. Also, we found that the soil water moving has traffic jam within 24 hours after finished first

  5. Enhancing retention of partial dentures using elastomeric retention rings

    Directory of Open Access Journals (Sweden)

    Kakkirala Revathi

    2015-01-01

    Full Text Available This report presents an alternative method for the retention of partial dentures that relies on the engagement of tooth undercuts by a lining material. The lab procedures are also presented. A new maxillary and mandibular acrylic partial dentures were fabricated using elastomeric retention technique for a partially dentate patient. A partially dentate man reported difficulty in retaining his upper removable partial denture (RPD. The maxillary RPD was designed utilizing elastomeric retention technique. During follow-up, it was necessary to replace the retention rings due to wear. The replacement of the retention rings, in this case, was done through a chairside reline technique. Elastomeric retention technique provides exceptionally good retention can be indicated to stabilize, cushion, splint periodontally involved teeth, no enough undercut for clasps, eliminate extractions, single or isolated teeth.

  6. Changes of microstructure characteristics and intermolecular interactions of preserved egg white gel during pickling.

    Science.gov (United States)

    Zhao, Yan; Chen, Zhangyi; Li, Jianke; Xu, Mingsheng; Shao, Yaoyao; Tu, Yonggang

    2016-07-15

    Changes in gel microstructure characteristics and in intermolecular interactions of preserved egg whites during pickling were investigated. Spin-spin relaxation times of preserved egg whites significantly decreased in the first 8 days and remained unchanged after the 16th day. SEM images revealed a three-dimensional gel network, interwoven with a loose linear fibrous mesh structure. The protein gel mesh structure became more regular, smaller, and compacted with pickling time. Free sulfhydryl contents in the egg whites increased significantly, while total sulfhydryl contents dramatically decreased during pickling. The primary intermolecular forces in the preserved egg white gels were ionic and disulfide bonds. Secondary forces included hydrophobic interaction and relatively few hydrogen bonds. During the first 8 days, the proportion of ionic bonds sharply decreased, and that of disulfide bonds increased over the first 24 days. Copyright © 2016 Elsevier Ltd. All rights reserved.

  7. Bioactive Egg Components and Inflammation

    Directory of Open Access Journals (Sweden)

    Catherine J. Andersen

    2015-09-01

    Full Text Available Inflammation is a normal acute response of the immune system to pathogens and tissue injury. However, chronic inflammation is known to play a significant role in the pathophysiology of numerous chronic diseases, such as cardiovascular disease, type 2 diabetes mellitus, and cancer. Thus, the impact of dietary factors on inflammation may provide key insight into mitigating chronic disease risk. Eggs are recognized as a functional food that contain a variety of bioactive compounds that can influence pro- and anti-inflammatory pathways. Interestingly, the effects of egg consumption on inflammation varies across different populations, including those that are classified as healthy, overweight, metabolic syndrome, and type 2 diabetic. The following review will discuss the pro- and anti-inflammatory properties of egg components, with a focus on egg phospholipids, cholesterol, the carotenoids lutein and zeaxanthin, and bioactive proteins. The effects of egg consumption of inflammation across human populations will additionally be presented. Together, these findings have implications for population-specific dietary recommendations and chronic disease risk.

  8. Bioactive Egg Components and Inflammation

    Science.gov (United States)

    Andersen, Catherine J.

    2015-01-01

    Inflammation is a normal acute response of the immune system to pathogens and tissue injury. However, chronic inflammation is known to play a significant role in the pathophysiology of numerous chronic diseases, such as cardiovascular disease, type 2 diabetes mellitus, and cancer. Thus, the impact of dietary factors on inflammation may provide key insight into mitigating chronic disease risk. Eggs are recognized as a functional food that contain a variety of bioactive compounds that can influence pro- and anti-inflammatory pathways. Interestingly, the effects of egg consumption on inflammation varies across different populations, including those that are classified as healthy, overweight, metabolic syndrome, and type 2 diabetic. The following review will discuss the pro- and anti-inflammatory properties of egg components, with a focus on egg phospholipids, cholesterol, the carotenoids lutein and zeaxanthin, and bioactive proteins. The effects of egg consumption of inflammation across human populations will additionally be presented. Together, these findings have implications for population-specific dietary recommendations and chronic disease risk. PMID:26389951

  9. Egg laying sequence influences egg mercury concentrations and egg size in three bird species: Implications for contaminant monitoring programs

    Science.gov (United States)

    Ackerman, Joshua T.; Eagles-Smith, Collin A.; Herzog, Mark P.; Yee, Julie L.; Hartman, C. Alex

    2016-01-01

    Bird eggs are commonly used in contaminant monitoring programs and toxicological risk assessments, but intra-clutch variation and sampling methodology could influence interpretability. We examined the influence of egg laying sequence on egg mercury concentrations and burdens in American avocets, black-necked stilts, and Forster's terns. The average decline in mercury concentrations between the first and last egg laid was 33% for stilts, 22% for terns, and 11% for avocets, and most of this decline occurred between the first and second eggs laid (24% for stilts, 18% for terns, and 9% for avocets). Trends in egg size with egg laying order were inconsistent among species and overall differences in egg volume, mass, length, and width were mercury concentrations generally declined by 16% between the first and second eggs laid. Despite the strong effect of egg laying sequence, most of the variance in egg mercury concentrations still occurred among clutches (75%-91%) rather than within clutches (9%-25%). Using simulations, we determined that to accurately estimate a population's mean egg mercury concentration using only a single random egg from a subset of nests, it would require sampling >60 nests to represent a large population (10% accuracy) or ≥14 nests to represent a small colony that contained <100 nests (20% accuracy).

  10. Cyber Workforce Retention

    Science.gov (United States)

    2016-10-01

    Project Air Force. Santa Monica, CA: RAND Corporation, 2012. Healey , Jason . “Claiming the Lost Cyber Heritage.” Strategic Studies Quarterly 6, no. 3...We next look at specific options to reshape, grow, and retain a sustainable 1B4 cyber force for the future. Notes 1. Healey , “Lost Cyber Heritage

  11. Effects of Divergent Selection Body Weight and the Quail Laying Eggs on some Physical and Mechanical Properties of Japanese Quail Eggs

    Directory of Open Access Journals (Sweden)

    mousareza baghani

    2016-08-01

    Full Text Available Introduction Breeding quail and quail egg industrial production because of the high nutritional value of these products has been developing these years. Considering the high demand and economical production, further development in the future is predicted. In order to design and effective utilization of the equipment for transportation, separation, packaging and storage, the physical and mechanical properties of quail eggs are needed. It is of great importance to study the factors which are influencing these properties. Strength of the shell is an important factor in determination of quail egg quality. Quail egg shell strength depends on several variables including specific gravity, egg weight and volume, shell thickness, weight and percentage of shell, hardness, breaking force, breaking energy, egg surface, farming conditions, type and species of birds, nutrition and geometric characteristics of eggs. Materials and Methods In this paper, initially in three phases, at 15 weeks, 19 weeks and 23 weeks, shell strength changes and physical properties of quail eggs on 90 quails during their first period of laying eggs were studied. Measured properties were included dimensions, weight, volume, specific gravity, shell thickness, weight and percentage of shell, breaking force, breaking energy, egg surface and some other properties. In the second part the effects of divergent selection for the bird’s body weight at four weeks of age on the quail eggs of fifth generation were studied. Measured properties were included dimensions, weight, volume, breaking force, breaking energy and some factors for direct and indirect measurement of strength of quail eggs. For direct measurement of the strength of eggshell of quail, two methods were employed: The first method was quasi-static compression test between two parallel plates of the universal testing machine and the second method was measuring specific gravity. In the first method, eggs were compressed between

  12. Eggs on Ice. Imaginaries on Eggs and Cryopreservation in Denmark

    DEFF Research Database (Denmark)

    Herrmann, Janne Rothmar; Kroløkke, Charlotte

    2018-01-01

    While Denmark is widely known as a global exporter of cryopreserved sperm, Danish women’s eggs follow very different trajectories. This paper combines legal and rhetorical analyses with the concept of sociotechnical imaginaries (Jasanoff, 2015). In establishing the genealogy of the sociotechnical...

  13. Evaluation of Reproductive Performance, Egg Production and Egg ...

    African Journals Online (AJOL)

    At 18 weeks of age, seventy two (72) adult females FE were housed singly in battery cages and evaluated for egg production from sexual maturity to 52 weeks in lay. The results showed ... Percentage hen housed production (HHP) was 53.10% while the percentage hen day production (HDP) was 57.6%. Age had significant ...

  14. The manipulation of egg size and egg quality

    African Journals Online (AJOL)

    flocks already in lay. Manipulation of sexual maturity does not require light-proof houses but the changes in eggmass which result are irreversible, being correlated with permanent changes in body size. Increases in egg size achieved with ahemerallight-dark cycles, on the other hand, are temporary and can easily be ...

  15. Diseases of amphibian eggs and embryos

    Science.gov (United States)

    Green, D.E.; Converse, K.A.; Majumdar, S.K.; Huffman, J.E.; Brenner, F.J.; Panah, A.I.

    2005-01-01

    Amphibians generally are prolific egg producers. In tropical and semi-tropical regions, deposition of eggs may occur year-round or may coincide with rainy seasons, while in temperate regions, deposition of eggs usually occurs immediately after emergence from hibernation. Numbers of eggs produced by each species may vary from a few dozen to thousands. Accordingly, some eggs may be infertile and wastage of embryos is to be expected. Fertility, viability and decomposition of eggs and embryos must be considered before it is assumed that diseases are present. An important consideration in the evaluation of egg masses is the fact that some will contain infertile and non-viable eggs. These infertile and nonviable eggs will undergo decomposition and they may appear similar to eggs that are infected by a pathogen. Evaluation of egg masses and embryos for the presence of disease may require repeated observations in a given breeding season as well as continued monitoring of egg masses during their growth and development and over successive breeding seasons. Amphibian eggs rarely are subjected to a comprehensive health (diagnostic) examination; hence, there is scant literature on the diseases of this life stage. Indeed, the eggs of some North American amphibians have yet to be described. Much basic physiology and normal biomedical baseline data on amphibian eggs is lacking. For example, it is known that the aquatic eggs of some species of shrimp quickly are coated by a protective and commensal bacterium that effectively impedes invasion of the eggs by other environmental organisms and potential pathogens. In the absence of this bacterium, shrimp eggs are rapidly killed by other bacteria and fungi (Green, 2001). The possibility that amphibian eggs also have important symbiotic or commensal bacteria needs to be investigated. Furthermore, the quantity and types of chemicals in the normal gelatinous capsules of amphibian eggs have scarcely been examined. Abnormalities of the

  16. Frozen Egg Products for Air Force Missile Sites

    Science.gov (United States)

    1974-01-01

    Acceptable Ingredients Schillings, Crown Colony ( Safeway ) wu-formula flour, Rice Products Col, 26 O’Forrell St., San Francisco. TCikkcman. Sea...Serve with catsup. Acceptable Ingredients Carnation or Lucerne. TJel-Air Frozen S> redded Hash Browns ( Safeway ). jPreco, Real Pre-cooked Bacon...cycles of 30 sec. on/30 sec. off. •Serve with syrup. Acceptable Ingredients Carnation or Lucerne. Bel-Air Frozen Shredded Hash Browns ( Safeway

  17. Morphological characteristics and egg production of forced-moult ...

    African Journals Online (AJOL)

    Owner

    Poultry production in warm wet humid climate. Macmillan Publishers Ltd. London. pp. 118-129. Rose SP (1997). Principles of Poultry Science. CAB. International. Wallingford. UK. pp. 44-61. Spearman RIC (1971). Integumentary system. In: Physiology and. Biochemistry of the domestic fowl. Vol.2. Bell, DJ and Freeman BM.

  18. [Loading and strength of single- and multi-unit fixed dental prostheses. 1. Retention and resistance

    NARCIS (Netherlands)

    Baat, C. de; Witter, D.J.; Meijers, C.C.A.J.; Vergoossen, E.L.; Creugers, N.H.J.

    2014-01-01

    The degree to which single- and multi-unit fixed dental prostheses are able to withstand loading forces is dependent, among other things, on the quality of their retention and resistance. The quality of the retention and resistance of the configuration of an abutment tooth prepared for a metal and

  19. Scabies mite, eggs, and stool photomicrograph (image)

    Science.gov (United States)

    ... photomicrograph of a skin scraping that contains a scabies mite, eggs, and feces. This animal burrows into the skin, depositing both eggs and feces. A scabies infestation causes intense itching (pruritus) which leads to ...

  20. Egg weight detection on machine vision system

    Science.gov (United States)

    Cen, Yike; Ying, Yibin; Rao, Xiuqin

    2006-10-01

    A machine vision system for egg weight detection was developed. Egg image was grabbed by a CCD camera and a frame grabber. An indicator composed of R, G, B intensity was used for image segmentation. A series of algorithms were developed to evaluate egg's vertical diameter, maximal horizontal diameter, upper horizontal diameter and nether horizontal diameter. Based on extracted four size features of vertical and maximal/upper/nether horizontal diameter, a regression model between egg's weight and its size was established using SAS, which was used to detect egg's weight. The experiment results indicated that, for egg weight detection on the machine vision system, the correlative coefficient of the regression model was 0.9781 and the absolute error was no more than +/-3 g, which would be lower work load on human graders and an increased flexibility in the egg quality control process in egg's industrialization.

  1. Shell Eggs from Farm to Table

    Science.gov (United States)

    ... high amount of iron in the cooking water. Scrambled eggs cooked at too high a temperature or held ... must be cooked thoroughly until yolks are firm. Scrambled eggs should not be runny. Casseroles and other dishes ...

  2. Occupational asthma induced by inhaled egg lysozyme.

    Science.gov (United States)

    Bernstein, J A; Kraut, A; Bernstein, D I; Warrington, R; Bolin, T; Warren, C P; Bernstein, I L

    1993-02-01

    A 26-year-old man employed in a company which manufactured hen egg white derived lysozyme for use in the pharmaceutical industry was evaluated for occupational asthma. The worker began to experience immediate-onset asthmatic symptoms two months after starting to work with egg lysozyme powder. The work process involved the production of approximately 1,000 kg of purified dried lysozyme powder per week. Prick skin testing was positive to egg lysozyme (50 mg/ml) and other egg protein components, but negative to whole egg white and egg yolk reagents. Serum specific IgE to egg lysozyme was documented. Decrements in serial peak expiratory flow rates were associated with lysozyme exposure at work. A specific bronchoprovocation challenge to lysozyme powder was positive demonstrating an isolated immediate asthmatic response (48 percent decrease from baseline FEV1). This is the first reported case of lysozyme-induced asthma specifically caused by inhalational exposure to egg lysozyme.

  3. Raw eggs-moving target

    Science.gov (United States)

    Forrest, Doug

    1999-09-01

    High school physics students often have difficulty with understanding when and where to use an appropriate calculation to solve a problem. In this activity students have to solve a real problem using formulas they have seen before, but in a context with which they are unfamiliar; namely dropping a raw egg on a moving target-their instructor.

  4. How do eggs pan out?

    Science.gov (United States)

    Clark, N

    1998-07-01

    Once upon a time, eggs were considered a "breakfast of champions." Just about every active, hard-working person enjoyed them fried, scrambled, poached, or even raw in eggnog and protein drinks. Then, Americans became cholesterol-conscious and began to substitute bagels, cereal, and other high-carbohydrate, low-cholesterol breakfast foods.

  5. Environmental contamination with Toxocara eggs

    NARCIS (Netherlands)

    Nijsse, Rolf; Mughini-Gras, Lapo; Wagenaar, J.A.; Franssen, Frits; Ploeger, Harm W.

    2015-01-01

    Background: Environmental contamination with Toxocara eggs is considered the main source of human toxocariasis. The contribution of different groups of hosts to this contamination is largely unknown. Current deworming advices focus mainly on dogs. However, controversy exists about blind deworming

  6. Plant response to butterfly eggs

    NARCIS (Netherlands)

    Griese, Eddie; Dicke, Marcel; Hilker, Monika; Fatouros, Nina E.

    2017-01-01

    Plants employ various defences killing the insect attacker in an early stage. Oviposition by cabbage white butterflies (Pieris spp.) on brassicaceous plants, including Brassica nigra, induces a hypersensitive response (HR) - like leaf necrosis promoting desiccation of eggs. To gain a deeper insight

  7. Organic and free-range egg production

    OpenAIRE

    Hammershøj, M.

    2011-01-01

    This chapter includes information on the development of the free range and the organic egg production and their market shares in different countries. Consumer behaviour is investigated particularly in relation to the price and availability of non-cage eggs. Regulations on the production of free range and organic eggs and their present and future impact are examined. Nutrient supply, animal welfare, productivity, safety and environmental impact of the types of egg production are covered with a...

  8. Vitamin B12 absorption from eggs.

    Science.gov (United States)

    Doscherholmen, A; McMahon, J; Ripley, D

    1975-09-01

    The assimilation of 57Co B12 from in vivo labeled eggs was much inferior to that of a comparable amount of crystalline 57Co B12. Furthermore, the absorption varied with the form in which the eggs were served. Judged by the urinary excretion test and the plasma absorption of radioactivity the average absorption from boiled and fried eggs was more than twice that from scrambled whole eggs, but less than half that absorbed from crystalline 57Co B12.

  9. Differences in internal egg quality characteristics between white and brown shell eggs

    Science.gov (United States)

    Aygün, Ali; Narinç, Dogan

    2017-04-01

    This study was conducted to reveal the differences among the internal quality characteristics of brown and white shell table eggs and to examine the relationship between quality characteristics. A total of 235 eggs from brown and white laying hens (Nick-chick; 95 wk of age) were used in this study. Internal egg quality characteristics including egg weight, albumen height, Haugh Unit, yolk height, yolk index, albumen pH, yolk pH, yolk color were determined. The Haugh unit (Pwhite shell eggs were higher than that of brown shell eggs. On the contrary, the yolk a*(Pwhite shell eggs were lower than that of brown shell eggs. There were no significant differences were found between white and brown shell eggs for egg weight, albumen and yolk pH values. Significant (Pegg quality of white shell eggs. Similarly, there were significant (Pegg weight and albumen height (r=0.39), albumen height and yolk height (r=0.35), Haugh unit and yolk index (r=0.36) in internal egg quality of brown shell eggs. Significant (Pwhite shell eggs, and yolk L* and yolk a* (r=-0.56) in brown shell eggs. No significant relationships were observed among others internal egg quality criteria.

  10. The Effects of Egg Shape Index on Egg Quality Traits of Guinea Fowl (Numida meleagris

    Directory of Open Access Journals (Sweden)

    Sezai Alkan

    2016-09-01

    Full Text Available The aim of this study was to investigated the effects of the egg shape index on egg quality characteristics in Guinea fowl. For this, the eggs were classified in terms of egg shape index, as ≤ 75, and ≥ 78. A total of 100 Guinea fowl eggs were evaluated to determine the egg quality traits ( egg weight, eggshell thickness, eggshell surface area, eggshell weight per unit surface area, eggshell ratio, albumen index, albumen ratio, yolk index, yolk ratio, yolk/albumen ratio, haugh unit and egg volume. In this study, eggshell thickness, eggshell weight per unit surface area, eggshell ratio, albumen index, albumen ratio, yolk index, yolk ratio, yolk/albumen ratio and haugh unit were not significantly affected by egg shape index groups. Whereas egg weight, eggshell surface area and egg volume were significantly affected by egg shape index groups. At the same time, there were found significant relationship between the egg shape index and egg quality traits. Egg shape index was found to be an important factor affecting the egg quality characteristics.

  11. Storage of Eggs in Water Affects Internal Egg Quality, Embryonic Development, and Hatchling Quality

    NARCIS (Netherlands)

    Brand, van den H.; Reijrink, I.A.M.; Hoekstra, L.A.; Kemp, B.

    2008-01-01

    In a series of experiments, effects of storage of eggs in water on internal egg quality, embryonic development, and hatchling quality were investigated. In experiment 1, unfertilized eggs were stored for 4 to 14 d in water (W) or air (control; C). In experiment 2, fertilized eggs were stored for 3

  12. Effect of location of eggs in the incubator on hatchability of eggs from ...

    African Journals Online (AJOL)

    ... the hatchability of all eggs set and of fertile eggs was the highest in eggs placed in the front of the machine. Furthermore, early and middle stage deaths during incubation were lower in the front of the incubator compared to the back. The differences between eggs placed in the upper, middle and lower parts of the machine ...

  13. Military Personnel: Perceptions of Retention-Critical Personnel Are Similar to Those of Other Enlisted Personnel

    National Research Council Canada - National Science Library

    2001-01-01

    .... In testimony before the Senate Armed Services Committee in September 1998, the members of the Joint Chiefs of Staff testified that retention rates had declined force-wide and within specific critical occupations...

  14. The Effect of Sandblasting on the Retention of Orthodontic Bands: An in vitro Study

    Directory of Open Access Journals (Sweden)

    Vishal A Nalawade

    2013-01-01

    Interpretation and conclusion: GIC requires the highest force to deband when compared with polycarboxylate and zinc phosphate cements when used on nonsandblasted bands. In-office sandblasting appears to be an efficient method to increase the retention of orthodontic bands.

  15. Prospects of table eggs production in Belarus

    OpenAIRE

    Sytchevnik, Anna; Golovkov, Vladimir

    2010-01-01

    Problems of development of egg production in Belarus are considered. Dynamics of volume of egg production is considered for the period of 1995-2009. Results of production and sale of eggs by integrated (mass production) poultry farms are analyzed by means of a correlation method.

  16. COMPARATIVE STUDY ON THE CHARACTERISTICS OF EGG ...

    African Journals Online (AJOL)

    Preferred Customer

    although the problem is alleviated in many other countries where it is an acceptable practice to feed treated egg shell back to animals as a source of calcium and this is a very efficient option for the disposal of egg shells. Egg shell waste primarily contains calcium, magnesium carbonate (lime) and protein [1]. In order to ...

  17. [Diagnostic stain of helminth eggs (author's transl)].

    Science.gov (United States)

    Cerva, L

    1976-12-01

    A description is given of a diagnostic method for the staining of eggs and larvae of intestinal helminth in smears of both fresh and fixed stool samples. The contents of the eggs and larvae stain red, the background various shades of blue. The most contrasting staining was obtained with thin-walled eggs.

  18. Recycling retention functions

    International Nuclear Information System (INIS)

    Skrable, K.W.; Chabot, G.E.; Johnson, M.H.

    1981-01-01

    Beginning with the concept of any number of physiologically meaningful compartments that recycle material with a central extracellular fluid compartment and considering various excretion pathways, we solve the differential equations describing the kinetics by the method of Laplace to obtain concise algebraic expressions for the retentions. These expressions contain both fundamental and eigenvalue rate constants; the eigenvalue rate constants are obtained from the solution of a polynomial incorporating the fundamental rate constants. Mathematically exact expressions that predict the biodistribution resulting from continuous uptakes are used to obtain very simple mathematically exact steady state expressions as well as approximate expressions applicable to any time. These steady state and approximate expressions contain only the fundamental rate constants; also, they include a recycling factor that describes the increase in the biodistributions because of recycling. To obtain the values of the fundamental rate constants, short term kinetics studies along with data on the long term distributions are suggested. Retention functions obtained in this way predict both the short term and long term distributions; they therefore are useful in the interpretation of bioassay data and in the estimation of internal doses

  19. Egg laying sequence influences egg mercury concentrations and egg size in three bird species: Implications for contaminant monitoring programs

    Science.gov (United States)

    Ackerman, Joshua T.; Eagles-Smith, Collin A.; Herzog, Mark P.; Yee, Julie L.; Hartman, C. Alex

    2016-01-01

    Bird eggs are commonly used in contaminant monitoring programs and toxicological risk assessments, but intra-clutch variation and sampling methodology could influence interpretability. We examined the influence of egg laying sequence on egg mercury concentrations and burdens in American avocets, black-necked stilts, and Forster's terns. The average decline in mercury concentrations between the first and last egg laid was 33% for stilts, 22% for terns, and 11% for avocets, and most of this decline occurred between the first and second eggs laid (24% for stilts, 18% for terns, and 9% for avocets). Trends in egg size with egg laying order were inconsistent among species and overall differences in egg volume, mass, length, and width were laying sequence, most of the variance in egg mercury concentrations still occurred among clutches (75%-91%) rather than within clutches (9%-25%). Using simulations, we determined that to accurately estimate a population's mean egg mercury concentration using only a single random egg from a subset of nests, it would require sampling >60 nests to represent a large population (10% accuracy) or ≥14 nests to represent a small colony that contained <100 nests (20% accuracy).

  20. Influence of algal diet on feeding and egg-production of the calanoid copepod Acartia tonsa Dana

    DEFF Research Database (Denmark)

    Støttrup, Josianne; Jensen, Johanne

    1990-01-01

    Grun. Feeding and egg-production in A. tonsa was shown to be influenced by the size, quantity and quality of the food particles. The small I. galbana (4.8 μm) were inefficiently retained by A. tonsa and maximum ingestion rates on this species were first obtained at algal concentrations s> 1 μg C · ml−1......Threshold concentration, retention efficiency and egg-production in the calanoid copepod Acartia tonsa Dana were examined using the algal species Isochrysis galbana clone T-iso, Dunalietta tertiolecta Butcher, Rhodomonas baltica Karsten, Ditylum brightwellii Grunow and Thalassiosira weissflogii....... However, the highest maximum rate of egg-production was obtained when feeding on this algal species with gross efficiencies of 22 and 38% in terms of carbon and nitrogen, respectively. Egg-production in A. tonsa ceased entirely within 4 days of feeding on a sole diet of D. tertiolecta. D. tertiolecta...

  1. 21 CFR 160.145 - Dried egg whites.

    Science.gov (United States)

    2010-04-01

    ... egg whites. (a) The food dried egg whites, egg white solids, dried egg albumen, egg albumen solids is... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Dried egg whites. 160.145 Section 160.145 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN...

  2. The influence of the number and the type of magnetic attachment on the retention of mandibular mini implant overdenture.

    Science.gov (United States)

    Lee, Eunjee; Shin, Soo-Yeon

    2017-02-01

    The aim of this study was to compare the retention of mini implant overdenture by the number, the type of magnetic attachment, and the directions of applied dislodging force. The experimental groups were designed by the number and type of magnetic attachment. Twenty samples were tested with Magden implants. Each attachment was composed of the magnet assembly in overdenture sample and the abutment keeper in a mandibular model. Dislodging forces were applied to the overdenture samples (50.0 mm/min) in 3 directions. The loading was repeated 10 times in each direction. The values of dislodging force were analyzed statistically using SPSS at 95% level of confidence. The retentive force of group 2 was greater than that of group 1 in both types of attachment in every direction ( P attachment was higher than that of cushion type attachment in both groups ( P attachment types ( P attachment showed the lowest retentive force with anteriorposterior direction of dislodging force ( P implant overdenture were obtained, regardless of the number and type of magnetic attachment. In both types of magnetic attachment, the greater retentive force was attained with more implants. Oblique retentive force of flat type magnetic attachment was greater than that of cushion type. Among all subgroups, anterior-posterior retentive force was the lowest among three different directions of dislodging force.

  3. Flocculation of diatomite by methylated egg albumin

    OpenAIRE

    Seki, Hideshi; Suzuki, Akira

    2003-01-01

    A common and inexpensive protein, egg albumin, was applied to the solid-liquid separation or flocculation of diatomite. Egg albumin was methylated in a 0.1 M HCl methyl alcohol solution at room temperature. About 90% of the carboxylic groups of egg albumin could be methylated within 24 h. The adsorption of egg albumin to diatomite at pH6.8 was remarkably enhanced by methylation. The adsorption constant of methylated egg albumin to diatomite at 30°C was about 100-fold larger than that of nativ...

  4. Energy density of marine pelagic fish eggs

    DEFF Research Database (Denmark)

    Riis-Vestergaard, J.

    2002-01-01

    Analysis of the literature on pelagic fish eggs enabled generalizations to be made of their energy densities, because the property of being buoyant in sea water appears to constrain the proximate composition of the eggs and thus to minimize interspecific variation. An energy density of 1.34 J mul......(-1) of total egg volume is derived for most species spawning eggs without visible oil globules. The energy density of eggs with oil globules is predicted by (σ) over cap = 1.34 + 40.61 x (J mul(-1)) where x is the fractional volume of the oil globule. (C) 2002 The Fisheries Society of the British...

  5. Drug Retention Times

    Energy Technology Data Exchange (ETDEWEB)

    None, None

    2007-05-01

    The purpose of this monograph is to provide information on drug retention times in the human body. The information provided is based on plausible illegal drug use activities that might be engaged in by a recreational drug user. Based on anecdotal evidence, most people “party” during extended time away from the work environment. Therefore, the following scenarios were envisioned: (1) a person uses an illicit drug at a party on Saturday night (infrequent user); (2) a person uses a drug one time on Friday night and once again on Saturday night (infrequent user); and (3) a person uses a drug on Friday night, uses a drug twice on Saturday night, and once again on Sunday (frequent user).

  6. Obligate brood parasites as selective agents for evolution of egg appearance in passerine birds.

    Science.gov (United States)

    Stokke, Bard G; Moksnes, Arne; Røskaft, Eivin

    2002-01-01

    Many passerine host species have counteracted the parasite egg mimicry in their coevolutionary arms race with the common cuckoo (Cuculus canorus) by evolving increased interclutch and reduced intraclutch variation in egg appearance. Such variations make it easier for hosts to recognize a foreign egg, reduce the possibility of making recognition errors, and reduce the ability of the cuckoo to mimic the eggs of a particular host. Here, we investigate if such clutch characteristics have evolved among North American passerines. We predict that due to the absence of brood parasites with egg mimicry on this continent, these passerines should (1) not show any relationship between rejection rates and intra- or interclutch variation, and (2) intraclutch variation should be lower and interclutch variation higher in European hosts exposed to cuckoo parasitism as compared to North American hosts parasitized by cowbirds. Here we present data that show support for most of these and other predictions, as well as when controlling statistically for effects of common descent. However, the effect of continent on intraclutch variation was less than predicted and we discuss a possible reason for this. All things considered, the results demonstrate that parasitism by a specialist brood parasite with egg mimicry is a powerful selective force regarding the evolution of egg characteristics in passerine birds.

  7. Research Synopsis: Spring 1983 Retention.

    Science.gov (United States)

    Peralta Community Coll. District, Oakland, CA. Office of Research, Planning and Development.

    An analysis of spring 1983 retention rates and grade distributions within the Peralta Community College District (PCCD) revealed: (1) College of Alameda had the highest successful retention rate in the PCCD, defined as the total of all students who completed the term with a grade of A, B, C, D, or CR (credit); (2) the PCCD's successful retention…

  8. Comparison of 3 luting agents on retention of implant-supported crowns on 2 different abutments.

    Science.gov (United States)

    Güncü, M Bariş; Cakan, Umut; Canay, Senay

    2011-10-01

    For fixed prostheses, retention is one of the most important factors for clinical success. It is unknown whether grooves that increase surface area of implant abutment while retaining the diameter and wall height provide greater uniaxial retention force. The purpose of this study was to determine the retention of 3 different cements on 2 implant abutments with different surface configurations. Thirty samples on 2 different abutments (a total of 60 crowns) with different margin and axial walls configuration and surface area were used. Metal crowns were fabricated on the abutment and cemented with 3 different (zinc-phosphate [ZP], glass ionomer [GI], or eugenol-free zinc oxide [ZO]) cements. After cementation, implant-abutment-casting assemblies were thermal cycled 1000 times with 1-minute dwell-time between 5°C and 55°C then subjected to tensile test with universal testing machine until decementation occurred. The mean force required to dislodge castings from abutment was determined. The luting agents influenced retention of castings on implant abutments, whereas different surface configurations and total surface area of the abutments did not influence the uniaxial retention forces. Among the cements tested, ZP exhibited higher values of retention, followed by GI and eugenol-free ZO. The increase in surface area of abutment did not result in improved retention. The present results suggest using ZP rather than GI and eugenol-free ZO in implant-supported crowns to provide higher retention.

  9. Egg care by termite soldiers

    Czech Academy of Sciences Publication Activity Database

    Hanus, Robert; Šobotník, Jan; Čížek, Lukáš

    2005-01-01

    Roč. 52, - (2005), 357-359 ISSN 0020-1812 R&D Projects: GA ČR(CZ) GA203/05/2146 Grant - others:NSF(US) DEB-97-07928; NSF(US) DEB-02-11591 Institutional research plan: CEZ:AV0Z40550506 Keywords : termite soldier * egg transport Subject RIV: CB - Analytical Chemistry, Separation Impact factor: 1.618, year: 2005

  10. Medical and social egg freezing

    DEFF Research Database (Denmark)

    Lallemant, Camille; Vassard, Ditte; Andersen, Anders Nyboe

    2016-01-01

    INTRODUCTION: Until recently, limited options for preserving fertility in order to delay childbearing were available. Although egg freezing and successful thawing is now possible, it remains unclear to what extent women are aware of the availability of this technique, their attitudes towards its ...... planning. Reassurance regarding its efficacy appears more important than its potential adverse effects on their health or that of future children, or the costs of the procedure....

  11. Predicting Pilot Retention

    Science.gov (United States)

    2012-06-15

    forever… Gig ‘Em! Dale W. Stanley III vii Table of Contents Page Acknowledgments...over the last 20 years. Airbus predicted that these trends would continue as emerging economies , especially in Asia, were creating a fast growing...US economy , pay differential and hiring by the major airlines contributed most to the decision to separate from the Air Force (Fullerton, 2003: 354

  12. Impact of egg handling and conditions during extended storage on egg quality.

    Science.gov (United States)

    Jones, D R; Ward, G E; Regmi, P; Karcher, D M

    2018-02-01

    The international trade of shell eggs has become more important in recent years in order to feed a growing worldwide population, meet food manufacturing demands, and address supply issues during disease outbreaks or product recalls. The primary barriers for the export and import of shell eggs are: whether to wash eggs and egg storage temperature. The current study was undertaken to compare egg quality factors as influenced by egg washing and storage temperature. Three lots of nest run white shell eggs were collected on consecutive d from a commercial in-line egg production facility. The treatment and storage conditions were selected to encompass the primary egg handling and storage conditions utilized throughout the world: washed; washed, oiled; and unwashed stored at 4°C; and unwashed stored at 22°C. Eggs were assessed weekly from 0 to 15 wk. Percent egg weight loss was greatest for the unwashed 22°C eggs (15.72%) and least for washed, oiled 4°C (0.33%, P < 0.0001). Less than 24 h at 22°C had a greater impact on yolk shape measurements decline than 15 wk at 4°C (P < 0.05). After 15 wk, average Haugh unit scores for all refrigerated treatments were still Grade A, and unwashed 22°C dropped from Grade AA to almost Grade B in one week. Room temperature storage of eggs rapidly declines egg quality. Egg treatment did not impact egg quality factors when stored at 4°C. Washing and oiling eggs before refrigerated storage did suppress the rate of egg weight loss. Published by Oxford University Press on behalf of Poultry Science Association 2017.

  13. Safety and feasibility of heated egg yolk challenge for children with egg allergies.

    Science.gov (United States)

    Yanagida, Noriyuki; Sato, Sakura; Asaumi, Tomoyuki; Ogura, Kiyotake; Borres, Magnus P; Ebisawa, Motohiro

    2017-06-01

    Hen's egg allergy is a frequent cause of childhood food allergy. Egg yolk is used in various commonly consumed foods; if children with allergy to hen's egg could eat heated egg yolk, their quality of life (QOL) would improve. No reports exist regarding oral food challenges (OFCs) for heated egg yolk. We aimed to clarify whether pediatric patients allergic to hen's egg could consume heated egg yolk. Data from pediatric patients who had undergone OFCs for heated egg yolk were evaluated retrospectively. Among 919 patients, positive OFC results were obtained in 17.0% of patients; seven presented with severe symptoms. Older age, high specific IgE value for ovomucoid, low total IgE levels, and history of anaphylaxis related to food other than hen's egg were risk factors for positive OFC results. Specific IgE values for egg white, ovomucoid, and egg yolk, indicative of a negative predictive value >95%, were 0.71, 0.41, and 0.17 kU A /l, respectively. A specific IgE to ovomucoid levels of 100 kU A /l predicted heated egg yolk-positive OFCs for 38.3% of patients. Among 763 patients with a negative OFC, seven (0.9%) reacted to heated egg yolk at home, and 756 (99.1%) consumed hen's egg yolk safely. Most pediatric patients allergic to heated hen's egg safely consumed heated egg yolk. Heated egg yolk OFCs rarely provoked severe symptoms and may be recommended for improving the QOL of children with allergy to hen's egg. © 2017 The Authors Pediatric Allergy and Immunology Published by John Wiley & Sons Ltd.

  14. Do flexible acrylic resin lingual flanges improve retention of mandibular complete dentures?

    Science.gov (United States)

    Ahmed Elmorsy, Ayman Elmorsy; Ahmed Ibraheem, Eman Mostafa; Ela, Alaa Aboul; Fahmy, Ahmed; Nassani, Mohammad Zakaria

    2015-01-01

    The aim of this study was to compare the retention of conventional mandibular complete dentures with that of mandibular complete dentures having lingual flanges constructed with flexible acrylic resin "Versacryl." The study sample comprised 10 completely edentulous patients. Each patient received one maxillary complete denture and two mandibular complete dentures. One mandibular denture was made of conventional heat-cured acrylic resin and the other had its lingual flanges made of flexible acrylic resin Versacryl. Digital force-meter was used to measure retention of mandibular dentures at delivery and at 2 weeks and 45 days following denture insertion. The statistical analysis showed that at baseline and follow-up appointments, retention of mandibular complete dentures with flexible lingual flanges was significantly greater than retention of conventional mandibular dentures (P dentures, retention of dentures increased significantly over the follow-up period (P acrylic resin lingual flanges in the construction of mandibular complete dentures improved denture retention.

  15. Flocculation of diatomite by methylated egg albumin.

    Science.gov (United States)

    Seki, Hideshi; Suzuki, Akira

    2003-07-01

    A common and inexpensive protein, egg albumin, was applied to the solid-liquid separation or flocculation of diatomite. Egg albumin was methylated in a 0.05 M HCl methyl alcohol solution at room temperature. About 90% of the carboxylic groups of egg albumin could be methylated within 24 h. The adsorption of egg albumin onto diatomite at pH 6.8 was remarkably enhanced by methylation. The adsorption constant of methylated egg albumin to diatomite at 30 degrees C was about 100-fold larger than that of native egg albumin; however, the adsorption constant of methylated egg albumin decreased to about 1/100 with temperature decreasing from 30 to 6 degrees C. The saturated adsorption amount of egg albumin was also increased by the methylation. The flocculating ability of methylated egg albumin was examined with a diatomite suspension at 6 and 30 degrees C in the pH range from pH 2 to 11. The diatomite suspension was effectively flocculated by the addition of small amounts of methylated egg albumin (only 0.5-1 wt% against diatomite) over a wide pH range from pH 3 to 10.

  16. Salmonella and Eggs: From Production to Plate

    Directory of Open Access Journals (Sweden)

    Harriet Whiley

    2015-02-01

    Full Text Available Salmonella contamination of eggs and egg shells has been identified as a public health concern worldwide. A recent shift in consumer preferences has impacted on the egg industry, with a push for cage-free egg production methods. There has also been an increased desire from consumers for raw and unprocessed foods, potentially increasing the risk of salmonellosis. In response to these changes, this review explores the current literature regarding Salmonella contamination of eggs during the production processing through to food handling protocols. The contamination of eggs with Salmonella during the production process is a complex issue, influenced by many variables including flock size, flock age, stress, feed, vaccination, and cleaning routines. Currently there is no consensus regarding the impact of caged, barn and free range egg production has on Salmonella contamination of eggs. The literature regarding the management and control strategies post-collection, during storage, transport and food handling is also reviewed. Pasteurisation and irradiation were identified as the only certain methods for controlling Salmonella and are essential for the protection of high risk groups, whereas control of temperature and pH were identified as potential control methods to minimise the risk for foods containing raw eggs; however, further research is required to provide more detailed control protocols and education programs to reduce the risk of salmonellosis from egg consumption.

  17. Salmonella and eggs: from production to plate.

    Science.gov (United States)

    Whiley, Harriet; Ross, Kirstin

    2015-02-26

    Salmonella contamination of eggs and egg shells has been identified as a public health concern worldwide. A recent shift in consumer preferences has impacted on the egg industry, with a push for cage-free egg production methods. There has also been an increased desire from consumers for raw and unprocessed foods, potentially increasing the risk of salmonellosis. In response to these changes, this review explores the current literature regarding Salmonella contamination of eggs during the production processing through to food handling protocols. The contamination of eggs with Salmonella during the production process is a complex issue, influenced by many variables including flock size, flock age, stress, feed, vaccination, and cleaning routines. Currently there is no consensus regarding the impact of caged, barn and free range egg production has on Salmonella contamination of eggs. The literature regarding the management and control strategies post-collection, during storage, transport and food handling is also reviewed. Pasteurisation and irradiation were identified as the only certain methods for controlling Salmonella and are essential for the protection of high risk groups, whereas control of temperature and pH were identified as potential control methods to minimise the risk for foods containing raw eggs; however, further research is required to provide more detailed control protocols and education programs to reduce the risk of salmonellosis from egg consumption.

  18. Rheological behaviour of egg white and egg yolk from different poultry specimen

    Science.gov (United States)

    Kumbár, V.; Nedomová, Š.; Votava, J.; Buchar, J.

    2017-01-01

    The main goal of this study is differences in rheological behaviour of hen (ISA BROWN), goose (Anser anser f. domestica) and Japanese quail (Coturnix japonica) egg white and egg yolk. The rheological behaviour of egg white and egg yolk was studied using a concentric cylinder viscometer. Rheological behaviour was pseudoplastic and flow curves were fitted by the Herschel-Bulkley model and Ostwald-de Waele model with high values of coeficients of determination R2. The meaning of rheological parameters on friction factors during flow of egg white and egg yolk in real tube has been shown. Preliminary information on time-dependent behaviour of tested liquids has been also obtained.

  19. Effects of variable attachment shapes and aligner material on aligner retention.

    Science.gov (United States)

    Dasy, Hiltrud; Dasy, Andreas; Asatrian, Greg; Rózsa, Noémi; Lee, Hao-Fu; Kwak, Jin Hee

    2015-11-01

    To evaluate the retention of four types of aligners on a dental arch with various attachments. For this study, three casts were manufactured, two of which contained attachments (ellipsoid and beveled), and one without any attachments to serve as a control. Four types of aligners were thermoformed: Clear-Aligner (CA)-soft, CA-medium, and CA-hard, with various thicknesses, and Essix ACE. Measurements of vertical displacement force during aligner removal were performed with the Gabo Qualimeter Eplexor. Means and standard deviations were next compared between different aligner thicknesses and attachment shapes. CA-soft, CA-medium, and CA-hard did not present a significant increase in retention, except when used in the presence of attachments. Additionally, CA-medium and CA-hard required significantly more force for removal. Essix ACE demonstrated a significant decrease in retention when used with ellipsoid attachments. The force value for Essix ACE removal from the cast with beveled attachments was comparable to that of CA-medium. Forces for aligner removal from the model without attachments showed a linear trend. Essix ACE did not show a continuous increase in retention for each model. Overall, ellipsoid attachments did not present a significant change in retention. In contrast, beveled attachments improved retention. Ellipsoid attachments had no significant influence on the force required for aligner removal and hence on aligner retention. Essix ACE showed significantly less retention than CA-hard on the models with attachments. Furthermore, beveled attachments were observed to increase retention significantly, compared with ellipsoid attachments and when using no attachments.

  20. Retention of gold alloy crowns cemented with traditional and resin cements.

    Science.gov (United States)

    Pinzón, Lilliam M; Frey, Gary N; Winkler, Mark M; Tate, William H; Burgess, John O; Powers, John M

    2009-01-01

    The aim of this study was to measure in vitro retention of cast gold crowns cemented with traditional and resin cements. Forty-eight human molars were prepared on a lathe to produce complete crown preparations with a consistent taper and split into six groups, eight crowns in each group. Crowns were cast in a high-gold alloy and then cemented. After 24 hours, the retention force (N) was recorded and mean values were analyzed by one-way analysis of variance and the Fisher post-hoc least significant difference (PLSD) multiple comparisons test (a = .05). Failure sites were examined under 3100 magnification and recorded. Mean values (SD) for each group in increasing order of retention force were: Harvard Cement: 43 N (27), TempoCem: 59 N (16), PermaCem Dual: 130 N (42), RelyX Luting Cement: 279 N (26), Contax and PermaCem Dual: 286 N (38), and TempoCem with Contax and PermaCem Dual: 340 N (14). The Fisher PLSD interval (P = .05) for comparing cements was 29 N. Zinc-phosphate cement and provisional resin cements had the lowest retention forces. Resin cement with a bonding agent and the hybrid-ionomer cement had similar retention forces. Resin cement with a bonding agent applied after use of a provisional resin cement had a significantly higher retention force than the other cements tested.

  1. Job embeddedness and nurse retention.

    Science.gov (United States)

    Reitz, O Ed; Anderson, Mary Ann; Hill, Pamela D

    2010-01-01

    Nurse retention is a different way of conceptualizing the employer-employee relationship when compared with turnover. Job embeddedness (JE), a construct based on retention, represents the sum of reasons why employees remain at their jobs. However, JE has not been investigated in relation to locale (urban or rural) or exclusively with a sample of registered nurses (RNs). The purpose of this study was to determine what factors (JE, age, gender, locale, and income) help predict nurse retention. A cross-sectional mailed survey design was used with RNs in different locales (urban or rural). Job embeddedness was measured by the score on the composite, standardized instrument. Nurse retention was measured by self-report items concerning intent to stay. A response rate of 49.3% was obtained. The typical respondent was female (96.1%), white, non-Hispanic (87.4%), and married (74.9%). Age and JE were predictive of nurse retention and accounted for 26% of the explained variance in intent to stay. Although age was a significant predictor of intent to stay, it accounted for only 1.4% of the variance while JE accounted for 24.6% of the variance of nurse retention (as measured by intent to stay). Older, more "embedded" nurses are more likely to remain employed in their current organization. Based on these findings, JE may form the basis for the development of an effective nurse retention program.

  2. The Effect Used at Egg Preservation Using Paraffin and the Use of Sodium Bicarbonate on Physical, Chemical and Organoleptical Characteristcs of Egg Crackers

    Directory of Open Access Journals (Sweden)

    Zulfatunnisa Zulfatunnisa

    2017-03-01

    Full Text Available The materials used in this research were egg crackers made from albumen, tapioca, wheat flour, garlic, salt, water and sodium bicarbonate. The variables measured were expansion power, breaking force, water content, protein content, mineral content and organoleptic quality (colour, flavour, crispiness. Data were analized with analysis of variance and followed by Duncan's Multiple Range Test.The result showed that the preservation with paraffin and the use of sodium bicarbonate had a highly significant effect (P<0.01 on expansion power, breaking force, water content, protein content, minerals content and organoleptic quality (colour, flavour and crispiness. It's interaction had a highly significant effect (P<0.01 on protein content and organoleptic quality (flavour and crispiness of eggcrackers. It is found that egg coated with paraffin can be kept for 60 days had highfoaming foroe similar value with egg without preservation however, it haddisadvantages on expansion poweq breaking force and colour than fresh egg, so suggested to improve by use increase quantity albumen and decrease the Use of Sodium bicarbonate.

  3. Payload retention device

    Science.gov (United States)

    Monford, Leo G., Jr.

    1992-06-01

    A payload retention device for grappling and retaining a payload in docked position on a supporting structure in the cargo bay of a space vehicle is presented. The device comprises a two-fault tolerant electromagnetic grappling system comprising electromagnets for attracting and grappling a grapple strike plate affixed to the payload when in proximity thereto and an electromechanical latching assembly comprising a pair of independent latching subassemblies. Each subassembly comprises a set of latching pawls which are driven into latching and unlatching positions relative to a grappled payload by a pair of gearmotors, each equipped with a ratchet clutch drive mechanism which is two-fault tolerant with respect to latching such that only one gearmotor of the four needs to be operational to effect a latch of the payload but is single fault tolerant with respect to release of a latched payload. Sensors are included for automatically sensing the magnetic grappling of a payload and for automatically de-energizing the gearmotors of the latching subassemblies when a latch condition is achieved.

  4. Maternal effects of egg size on emu Dromaius novaehollandiae egg composition and hatchling phenotype.

    Science.gov (United States)

    Dzialowski, Edward M; Sotherland, Paul R

    2004-02-01

    Parental investment in eggs and, consequently, in offspring can profoundly influence the phenotype, survival and ultimately evolutionary fitness of an organism. Avian eggs are excellent model systems to examine maternal allocation of energy translated through egg size variation. We used the natural range in emu Dromaius novaehollandiae egg size, from 400 g to >700 g, to examine the influence of maternal investment in eggs on the morphology and physiology of hatchlings. Female emus provisioned larger eggs with a greater absolute amount of energy, nutrients and water in the yolk and albumen. Variation in maternal investment was reflected in differences in hatchling size, which increased isometrically with egg size. Egg size also influenced the physiology of developing emu embryos, such that late-term embryonic metabolic rate was positively correlated with egg size and embryos developing in larger eggs consumed more yolk during development. Large eggs produced hatchlings that were both heavier (yolk-free wet and dry mass) and structurally larger (tibiotarsus and culmen lengths) than hatchlings emerging from smaller eggs. As with many other precocial birds, larger hatchlings also contained more water, which was reflected in a greater blood volume. However, blood osmolality, hemoglobin content and hematocrit did not vary with hatchling mass. Emu maternal investment in offspring, measured by egg size and composition, is significantly correlated with the morphology and physiology of hatchlings and, in turn, may influence the success of these organisms during the first days of the juvenile stage.

  5. Data Retention and Anonymity Services

    Science.gov (United States)

    Berthold, Stefan; Böhme, Rainer; Köpsell, Stefan

    The recently introduced legislation on data retention to aid prosecuting cyber-related crime in Europe also affects the achievable security of systems for anonymous communication on the Internet. We argue that data retention requires a review of existing security evaluations against a new class of realistic adversary models. In particular, we present theoretical results and first empirical evidence for intersection attacks by law enforcement authorities. The reference architecture for our study is the anonymity service AN.ON, from which we also collect empirical data. Our adversary model reflects an interpretation of the current implementation of the EC Directive on Data Retention in Germany.

  6. Retention capacity of random surfaces.

    Science.gov (United States)

    Knecht, Craig L; Trump, Walter; Ben-Avraham, Daniel; Ziff, Robert M

    2012-01-27

    We introduce a "water retention" model for liquids captured on a random surface with open boundaries and investigate the model for both continuous and discrete surface heights 0,1,…,n-1 on a square lattice with a square boundary. The model is found to have several intriguing features, including a nonmonotonic dependence of the retention on the number of levels: for many n, the retention is counterintuitively greater than that of an (n+1)-level system. The behavior is explained using percolation theory, by mapping it to a 2-level system with variable probability. Results in one dimension are also found.

  7. Occupational Recruitment, Retention, and Labor Force Cohort Representation.

    Science.gov (United States)

    Simpson, Ida Harper; And Others

    1982-01-01

    Presents an occupational competition model consisting of work qualifications, opportunities, rewards, and shelters to account for cohort representation in occupations. U.S. census data are used to follow four male and four female cohorts in 63 occupations over 20-year periods from 1920-40 and 1950-70. (Author/AM)

  8. The Fifty Year Rehabilitation of the Egg

    Directory of Open Access Journals (Sweden)

    Donald J. McNamara

    2015-10-01

    Full Text Available The 1968 American Heart Association announced a dietary recommendation that all individuals consume less than 300 mg of dietary cholesterol per day and no more than three whole eggs per week. This recommendation has not only significantly impacted the dietary patterns of the population, but also resulted in the public limiting a highly nutritious and affordable source of high quality nutrients, including choline which was limited in the diets of most individuals. The egg industry addressed the egg issue with research documenting the minimal effect of egg intake on plasma lipoprotein levels, as well as research verifying the importance of egg nutrients in a variety of issues related to health promotion. In 2015 dietary cholesterol and egg restrictions have been dropped by most health promotion agencies worldwide and recommended to be dropped from the 2015 Dietary Guidelines for Americans.

  9. Guide-Plane Retention in Designing Removable Partial Dentures.

    Science.gov (United States)

    Mothopi-Peri, Matshediso; Owen, C Peter

    To compare the influence of abutment teeth guide planes and guiding surfaces on retention of a removable partial denture (RPD). Extracted teeth embedded into a maxillary cast in the first premolar and second molar positions simulated two bounded saddles. Acrylic resin RPDs were made with no guide planes, then with guide planes, then with guiding surfaces added to directly contact the guide planes. The maximum loads on removal from the cast were recorded. There was a significant increase in retention force of 1.6 times when only guide planes were present and of 10.2 times when guiding surfaces intimately contacted the guide planes. The retention of acrylic resin RPDs can be substantially increased by making their guiding surfaces intimately contact the guide planes of the teeth.

  10. Effect of Olive Leaf ( Powder on Laying Hens Performance, Egg Quality and Egg Yolk Cholesterol Levels

    Directory of Open Access Journals (Sweden)

    H. Cayan

    2015-04-01

    Full Text Available This experiment was conducted to measure the effects of olive leaf powder on performance, egg yield, egg quality and yolk cholesterol level of laying hens. A total of 120 Lohmann Brown laying hens of 22 weeks old were used in this experiment. The birds were fed on standard layer diets containing 0, 1%, 2%, or 3% olive leaf powder for 8 weeks. Egg weight and yield were recorded daily; feed intake weekly; egg quality and cholesterol content at the end of the trial. Olive leaf powder had no effect on feed intake, egg weight, egg yield and feed conversion ratio (p>0.05 while olive leaf powder increased final body weight of hens (p0.05. To conclude, olive leaf powder can be used for reducing egg yolk cholesterol content and egg yolk coloring agent in layer diets.

  11. Gamma-linolenic acid egg production enriched with hemp seed oil and evening primrose oil in diet of laying hens.

    Science.gov (United States)

    Park, Sang-Oh; Hwangbo, Jong; Yuh, In-Suh; Park, Byung-Sung

    2014-07-01

    This study was carried out to find out the effect of supplying gamma linolenic acid (GLA) on laying performance and egg quality. A hundred twenty of 30 weeks old hyline brown laying hens with 98% of egg production were completely randomized to 4 different treatment groups by 30 hens (the control group fed with the diet containing beef tallow, 3 treatment groups fed with the diet containing corn oil, the diet containing hemp seed oil and the diet containing evening primrose oil, respectively), and their laying performance and egg production were investigated for 5 weeks. Intake of hemp seed oil or evening primrose helped to increase the retention rate of GLA, which was transmigrated into eggs from blood. GLA was not detected in the blood samples of control group and treatment group fed diet containing corn oil, while it was significantly increased in the blood samples of the treatment groups fed with diet containing hemp seed oil and diet containing evening primrose oil, respectively. GLA retention was not observed in the eggs produced respectively by control group and treatment group fed with diet containing corn oil, whereas it was significantly increased in the eggs produced by the treatment group fed with diet containing hemp seed oil by 1.09% and the treatment group fed with diet containing evening primrose oil by 4.87%. This result suggests that GLA-reinforced functional eggs can be produced by adding hemp seed oil and evening primrose oil to the feed for laying hens and feeding them with it. It is thought that further researches and clinical trials on biochemical mechanism related to atopic dermatitis should be conducted in future.

  12. Transit ridership, reliability, and retention.

    Science.gov (United States)

    2008-10-01

    This project explores two major components that affect transit ridership: travel time reliability and rider : retention. It has been recognized that transit travel time reliability may have a significant impact on : attractiveness of transit to many ...

  13. EA Shuttle Document Retention Effort

    Science.gov (United States)

    Wagner, Howard A.

    2010-01-01

    This slide presentation reviews the effort of code EA at Johnson Space Center (JSC) to identify and acquire databases and documents from the space shuttle program that are adjudged important for retention after the retirement of the space shuttle.

  14. Dinosaur origin of egg color: oviraptors laid blue-green eggs

    OpenAIRE

    Jasmina Wiemann; Tzu-Ruei Yang; Philipp N. Sander; Marion Schneider; Marianne Engeser; Stephanie Kath-Schorr; Christa E. Müller; P. Martin Sander

    2017-01-01

    Protoporphyrin (PP) and biliverdin (BV) give rise to the enormous diversity in avian egg coloration. Egg color serves several ecological purposes, including post-mating signaling and camouflage. Egg camouflage represents a major character of open-nesting birds which accomplish protection of their unhatched offspring against visually oriented predators by cryptic egg coloration. Cryptic coloration evolved to match the predominant shades of color found in the nesting environment. Such a selecti...

  15. Estimating the Number of Eggs in Blow Fly (Diptera: Calliphoridae) Egg Masses Using Photographic Analysis.

    Science.gov (United States)

    Rosati, J Y; Pacheco, V A; Vankosky, M A; Vanlaerhoven, S L

    2015-07-01

    Little work has been done to quantify the number of eggs oviposited by blow flies (Diptera: Calliphoridae) in studies examining colonization behavior. Egg counting methods currently available are time-consuming and destructive. This study used ImageJ software and analysis of covariance to relate the volume of egg masses to the number of eggs laid by three different blow fly species: Lucilia sericata (Meigen), Phormia regina (Meigen), and Chrysomya rufifacies (Macquart). Egg mass volume, species, and the interaction of species and egg mass volume all affected the number of blow fly eggs deposited in egg masses. Both species identity and egg mass volume are important when predicting egg number, as such a single regression equation cannot be used to estimate egg number for these three species. Therefore, simple linear regression equations were determined for each species. The volume of individual eggs was incorporated into the model, yet differences between species were observed, suggesting that the orientation of the eggs oviposited by multiple conspecific females within egg masses influences egg estimates. Based on our results, we expect that imaging software can be used for other blow fly species, as well as other insect species; however, equations specific to each species must be developed. This study describes an important tool for quantifying egg deposition in a nondestructive manner, which is important in studying the colonization behavior and life history of insects of ecological and forensic importance. © The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  16. As the Egg Turns: Monitoring Egg Attendance Behavior in Wild Birds Using Novel Data Logging Technology

    OpenAIRE

    Shaffer, Scott A.; Clatterbuck, Corey A.; Kelsey, Emma C.; Naiman, Alex D.; Young, Lindsay C.; VanderWerf, Eric A.; Warzybok, Pete; Bradley, Russell; Jahncke, Jaime; Bower, Geoff C.

    2014-01-01

    Egg turning is unique to birds and critical for embryonic development in most avian species. Technology that can measure changes in egg orientation and temperature at fine temporal scales (1 Hz) was neither readily available nor small enough to fit into artificial eggs until recently. Here we show the utility of novel miniature data loggers equipped with 3-axis (i.e., triaxial) accelerometers, magnetometers, and a temperature thermistor to study egg turning behavior in free-ranging birds. Art...

  17. Assessing the impact of egg sweating on Salmonella Enteritidis penetration into shell eggs.

    Science.gov (United States)

    Gradl, Janet A; Curtis, Patricia A; Jones, Deana R; Anderson, Kenneth E

    2017-07-01

    Salmonella Enteritidis (SE) prevalence in eggs is a major concern to the egg industry. Some research has shown that egg sweating can increase Salmonella penetration into egg contents when refrigerated eggs are moved to a warmer temperature. This occurs when eggs are tempered before wash, to minimize thermal cracks. The effect of egg sweating on SE penetration into shell eggs over a 6 week storage period at 4°C was assessed. A 2 × 2 factorial of SE inoculation and egg sweating was utilized. Treatments included (SES) nalidixic acid (NA)-resistant SE inoculated and sweated, (SENS) NA-resistant SE inoculated and not sweated, (NSES) buffered peptone water (BPW) inoculated and sweated, and (NSENS) BPW inoculated and not sweated. Eggs were inoculated with 108 SE. Eggs formed condensation for approximately 17 min in a 32°C incubator. Shell rinse, shell emulsion, and egg contents were sampled then enumerated and assessed for prevalence of SE over a 6 wk storage period at 4°C. After wk 1, the SENS shell rinse had higher SE counts (0.32 log10 CFU/mL) than the other 3 treatments, where no SE was enumerated. A significant week by treatment interaction was found for the shell rinse SE detection (P shell rinse, shell emulsion, or egg contents. The SENS shell rinses had significantly higher SE prevalence than the SES rinses in weeks 1 (100% vs. 34.3%), 2 (57.6% vs. 22.2%), and 3 (38.2% vs. 11.1%) (P shell emulsion across treatment or week (P < 0.05). The decreasing trend of SE prevalence obtained over the study period indicate that refrigeration is effective at inhibiting SE growth. These results indicate that egg sweating occurring under common US egg handling practices is not harmful to egg safety. © 2017 Poultry Science Association Inc.

  18. Using 3D printed eggs to examine the egg-rejection behaviour of wild birds

    Directory of Open Access Journals (Sweden)

    Branislav Igic

    2015-05-01

    Full Text Available The coevolutionary relationships between brood parasites and their hosts are often studied by examining the egg rejection behaviour of host species using artificial eggs. However, the traditional methods for producing artificial eggs out of plasticine, plastic, wood, or plaster-of-Paris are laborious, imprecise, and prone to human error. As an alternative, 3D printing may reduce human error, enable more precise manipulation of egg size and shape, and provide a more accurate and replicable protocol for generating artificial stimuli than traditional methods. However, the usefulness of 3D printing technology for egg rejection research remains to be tested. Here, we applied 3D printing technology to the extensively studied egg rejection behaviour of American robins, Turdus migratorius. Eggs of the robin’s brood parasites, brown-headed cowbirds, Molothrus ater, vary greatly in size and shape, but it is unknown whether host egg rejection decisions differ across this gradient of natural variation. We printed artificial eggs that encompass the natural range of shapes and sizes of cowbird eggs, painted them to resemble either robin or cowbird egg colour, and used them to artificially parasitize nests of breeding wild robins. In line with previous studies, we show that robins accept mimetically coloured and reject non-mimetically coloured artificial eggs. Although we found no evidence that subtle differences in parasitic egg size or shape affect robins’ rejection decisions, 3D printing will provide an opportunity for more extensive experimentation on the potential biological or evolutionary significance of size and shape variation of foreign eggs in rejection decisions. We provide a detailed protocol for generating 3D printed eggs using either personal 3D printers or commercial printing services, and highlight additional potential future applications for this technology in the study of egg rejection.

  19. phosphorus retention data and metadata

    Science.gov (United States)

    phosphorus retention in wetlands data and metadataThis dataset is associated with the following publication:Lane , C., and B. Autrey. Phosphorus retention of forested and emergent marsh depressional wetlands in differing land uses in Florida, USA. Wetlands Ecology and Management. Springer Science and Business Media B.V;Formerly Kluwer Academic Publishers B.V., GERMANY, 24(1): 45-60, (2016).

  20. Grade Retention and Unobserved Heterogeneity

    OpenAIRE

    Robert J. Gary-Bobo; Marion Gousse; Jean-Marc Robin

    2014-01-01

    We study the treatment effect of grade retention using a panel of French junior high-school students, taking unobserved heterogeneity and the endogeneity of grade repetitions into account. We specify a multistage model of human-capital accumulation with a finite number of types representing unobserved individual characteristics. Class-size and latent student-performance indices are assumed to follow finite mixtures of normal distributions. Grade retention may increase or decrea...

  1. Retention and surface changes of zirconia primary crowns with secondary crowns of different materials.

    Science.gov (United States)

    Turp, Işıl; Bozdağ, Ergün; Sünbüloğlu, Emin; Kahruman, Cem; Yusufoğlu, Ibrahim; Bayraktar, Gülsen

    2014-11-01

    To evaluate zirconia as a substitute for gold alloy in primary crowns facing secondary crowns manufactured with different materials, in terms of long-term retention force changes, wear, and phase transformation was aimed. A total of 12 groups, each containing six samples, consisting of gold alloy primary crown-electroformed gold secondary crowns (AA), zirconia primary crown-electroformed gold secondary crowns (ZA) and zirconia primary crown-casted non-precious alloy secondary crowns (ZC) with conus angles of 0°, 2°, 4°, and 6° were evaluated. Samples were subjected to 10,000 insertion-separation cycles in artificial saliva and retention force was measured. X-ray diffraction and scanning electron microscope analysis were performed on the sample surfaces. The highest retention forces were obtained from ZC-0° group (72.09-71.26 N) and the lowest were obtained from ZA-4° (12.73-19.44 N) and ZA-6° (5.36-19.73 N) groups in the beginning and after 10,000 cycles, respectively. Retention force increased as the conus angle decreased. The monoclinic phase ratio of the zirconia primary crowns decreased after the experiments. No wear was observed in zirconia primary crowns except for the ZC-0° and ZC-2° groups. The use of zirconia primary crowns resulted in a less excursive retention force. A more predictable and less excursive retention force can be obtained using a hard and rigid primary crown material like zirconia. Despite a lack of knowledge about the aging of zirconia without a veneer layer in the oral environment, zirconia primary crowns are more advantageous in terms of retention force development and wear.

  2. The performance and egg quality characteristics of layers fed diets ...

    African Journals Online (AJOL)

    Egg quality indices (egg shape index, egg specific gravity, Haugh unit, egg shell thickness, albumen index and yolk index) were not affected by the treatments (P > 0.05). Egg shell index was significantly (P<0.05) enhanced by Garcinia kola meal. At 2.5% level, it significantly enhanced percent albumin and reduced percent ...

  3. and B-eggs of macaroni and rockhopper penguins

    African Journals Online (AJOL)

    1987-08-04

    Aug 4, 1987 ... dimorphic in size and, although the smaller A-egg is laid several days before the 8-egg, in nests where both eggs ... those incubated for several days after laying in a hot-room, still had incubation periods longer than 8-eggs, suggesting that egg .... pumping hot-room air through the analyser with a hand-.

  4. The Drawdown: Impact on our Ability to Recruit, Retain and Sustain the Force of 2001

    National Research Council Canada - National Science Library

    Lempe, Scott

    1997-01-01

    .... More significant, it is the first ever to impact the All-Volunteer Force. This paper reviewed the following drawdown impacts on active duty Air Force people: retention; sustainment; and recruiting...

  5. Egg freezing and egg banking: empowerment and alienation in assisted reproduction.

    Science.gov (United States)

    Robertson, John A

    2014-06-01

    With the development of rapid freezing of human oocytes, many programs have reported IVF success rates comparable to those achieved with fresh eggs and thawed frozen embryos. Egg freezing is now gaining professional and regulatory acceptance as a safe and effective technique for women who wish to avoid discarding excess embryos, who face fertility-threatening medical treatments, or who want to preserve their eggs for use when they are better situated to have a family. This article focuses on the uses of and justification for egg freezing, the path to professional acceptance, the variability in success rates, and the controversy over freezing eggs for social rather than medical reasons. It also addresses the emergence of egg banking as a separate sector in the infertility industry, the regulatory issues that it poses, and its effect on egg donation. Key here is the legal control of stored eggs by banking women and their options when they wish to dispose of those eggs. The analysis is framed around empowerment and alienation. Egg freezing is generally empowering for women, but the donation or sale of unused eggs to infertile women, egg bankers, and researchers also raises issues of alienation.

  6. UV penetration depth in liquid egg white and liquid whole egg

    Science.gov (United States)

    Knowledge of penetration depth of UV in liquid egg is crucial in designing nonthermal UV pasteurizers. An experimental method was developed to determine penetration depth of 254 nm UV in liquid whole egg (LWE) and liquid egg white (LEW). An apparatus was assembled consisting of a bank of UV bulbs at...

  7. Influence of air composition during egg storage on egg characteristics, embryonic development, hatchability, and chick quality

    NARCIS (Netherlands)

    Reijrink, I.A.M.; Duijvendijk, van L.A.G.; Meijerhof, R.; Kemp, B.; Brand, van den H.

    2010-01-01

    Egg storage beyond 7 d is associated with an increase in incubation duration and a decrease in hatchability and chick quality. Negative effects of prolonged egg storage may be caused by changes in the embryo, by changes in egg characteristics, or by both. An adjustment in storage air composition may

  8. Predation on Japanese quail vs. house sparrow eggs in artificial nests: small eggs reveal small predators

    Science.gov (United States)

    Thomas J. Maier; Richard M. DeGraaf

    2000-01-01

    Nest predation studies frequently use eggs such as Japanese Quail (Coturnix japonica) to identify potential predators of Neotropical migrants' eggs, but such eggs may be too large or thick-shelled to identify the full complement of potential predators. We compared predation events and predators of Japanese Quail and smaller House Sparrow (

  9. Egg quality in fish: pH of stripped eggs can predict catfish hatching success

    Science.gov (United States)

    This study was conducted to determine the feasibility of measuring the pH of stripped unfertilized channel catfish eggs to predict the hatching success of channel x blue hybrid catfish eggs. A significant correlation was established between the ovarian fluid pH of stripped eggs and subsequent hatch...

  10. FEMALE PREFERENCE FOR NESTS WITH EGGS IS BASED ON THE PRESENCE OF THE EGGS THEMSELVES

    NARCIS (Netherlands)

    KRAAK, SBM; GROOTHUIS, TGG; Kraak, Sarah B.M.; Groothuis, Ton G.G.

    1994-01-01

    In many fish species of which males care for eggs in a nest, including Aidablennius sphynx, females prefer to mate with males that already guard eggs. In this paper we present two aquarium experiments with this Mediterranean blenny to determine whether the females actually use the presence of eggs

  11. Retention of cast crown copings cemented to implant abutments.

    Science.gov (United States)

    Dudley, J E; Richards, L C; Abbott, J R

    2008-12-01

    The cementation of crowns to dental implant abutments is an accepted form of crown retention that requires consideration of the properties of available cements within the applied clinical context. Dental luting agents are exposed to a number of stressors that may reduce crown retention in vivo, not the least of which is occlusal loading. This study investigated the influence of compressive cyclic loading on the physical retention of cast crown copings cemented to implant abutments. Cast crown copings were cemented to Straumann synOcta titanium implant abutments with three different readily used and available cements. Specimens were placed in a humidifier, thermocycled and subjected to one of four quantities of compressive cyclic loading. The uniaxial tensile force required to remove the cast crown copings was then recorded. The mean retention values for crown copings cemented with Panavia-F cement were statistically significantly greater than both KetacCem and TempBond non-eugenol cements at each compressive cyclic loading quantity. KetacCem and TempBond non-eugenol cements produced relatively low mean retention values that were not statistically significantly different at each quantity of compressive cyclic loading. Compressive cyclic loading had a statistically significant effect on Panavia-F specimens alone, but increased loading quantities produced no further statistically significant difference in mean retention. Within the limitations of the current in vitro conditions employed in this study, the retention of cast crown copings cemented to Straumann synOcta implant abutments with a resin, glass ionomer and temporary cement was significantly affected by cement type but not compressive cyclic loading. Resin cement is the cement of choice for the definitive non-retrievable cementation of cast crown copings to Straumann synOcta implant abutments out of the three cements tested.

  12. [Retention and biomechanics of retentive complexes. 3. The Kratochvil school and current retentive complexes].

    Science.gov (United States)

    Enrique Fernández, M; Jacques Grimonster, L

    1989-04-01

    The authors analyse the biomechanical bases of the Kratochvil "retentive complex" and show how they have induced the nowadays north-american propositions (RPI & RPA). They compare them to the european ones (Nally-Martinet).

  13. 9 CFR 590.45 - Prohibition on eggs and egg products not intended for use as human food.

    Science.gov (United States)

    2010-01-01

    ... (EGG PRODUCTS INSPECTION ACT) Eggs and Egg Products Not Intended for Human Food § 590.45 Prohibition on eggs and egg products not intended for use as human food. (a) No person shall buy, sell, or transport... not intended for use as human food. 590.45 Section 590.45 Animals and Animal Products FOOD SAFETY AND...

  14. Labor Force

    Science.gov (United States)

    Occupational Outlook Quarterly, 2012

    2012-01-01

    The labor force is the number of people ages 16 or older who are either working or looking for work. It does not include active-duty military personnel or the institutionalized population, such as prison inmates. Determining the size of the labor force is a way of determining how big the economy can get. The size of the labor force depends on two…

  15. Energy density of marine pelagic fish eggs

    DEFF Research Database (Denmark)

    Riis-Vestergaard, J.

    2002-01-01

    Analysis of the literature on pelagic fish eggs enabled generalizations to be made of their energy densities, because the property of being buoyant in sea water appears to constrain the proximate composition of the eggs and thus to minimize interspecific variation. An energy density of 1.34 J mul...

  16. Factors affecting egg ratios in planktonic rotifers

    NARCIS (Netherlands)

    Sarma, S.S.S.; Gulati, R.D.; Nandini, S.

    2005-01-01

    Edmondson’s egg ratio (number of amictic eggs per female) is an important life history variable, which has been in wide use to understand and predict patterns of population growth in planktonic rotifers under field conditions. It is also useful as an indicator of the health of rotifers under culture

  17. Female Zebra Finches Smell Their Eggs.

    Directory of Open Access Journals (Sweden)

    Sarah Golüke

    Full Text Available Parental investment in unrelated offspring seems maladaptive from an evolutionary perspective, due to the costs of energy and resources that cannot be invested in related offspring at the same time. Therefore selection should favour mechanisms to discriminate between own and foreign offspring. In birds, much emphasis has been placed on understanding the visual mechanisms underlying egg recognition. However, olfactory egg recognition has almost been completely ignored. Here, we investigated whether female zebra finches (Taeniopygia guttata are able to discriminate between their own and a conspecific egg based on olfactory cues alone. Zebra finches are colonial-breeding songbirds. Eggs are monomorphic, i.e. without any spotting pattern, and intraspecific brood parasitism frequently occurs. In a binary choice experiment, female zebra finches were given the choice between the scent of their own and a conspecific egg. After the onset of incubation, females chose randomly and showed no sign of discrimination. However, shortly before hatching, females preferred significantly the odour of their own egg. The finding that females are capable to smell their own egg may inspire more research on the potential of olfaction involved in egg recognition, especially in cases where visual cues might be limited.

  18. Modeling winter moth Operophtera brumata egg phenology

    NARCIS (Netherlands)

    Salis, Lucia; Lof, Marjolein; Asch, van Margriet; Visser, Marcel E.

    2016-01-01

    Understanding the relationship between an insect's developmental rate and temperature is crucial to forecast insect phenology under climate change. In the winter moth Operophtera brumata timing of egg-hatching has severe fitness consequences on growth and reproduction as egg-hatching has to match

  19. ACTION EGG PRODUCTION C.F. Saunders

    African Journals Online (AJOL)

    will continue in the future as investment capital and expertise becomes increasingly important inputs. Para- ... a viable and dynamic egg industry for the future. Structural Evolution. Earlier, chickens and other ... marketing channels are short and a major part of produc- tion is delivered directly to the retailer by the egg pro-.

  20. On eggs of some British Guyana Birds

    NARCIS (Netherlands)

    Young, C.G.

    1889-01-01

    They make no nest but lay their eggs in a depression in the ground where it is dry, on the beds of cultivated land, on the high dams between plantations, on the bare rocks up the rivers, and on the savannahs in the They lay two or three eggs.

  1. PHENOTYPIC CORRELATIONS BETWEEN EGG WEIGHT AND ...

    African Journals Online (AJOL)

    IBUKUN

    environmental ones (Bednarczyk, 1991). Genetic differences in egg quality characteristics have been reported to exist between species, and between breeds, strains and families within lines (Buss, 1982). Several studies have shown that hens with coloured feathers lay bigger eggs than hens with white feathers (Halaj and ...

  2. Plaice egg mortality: can we determine survivorschip?

    NARCIS (Netherlands)

    Dickey-Collas, M.; Fox, C.J.; Nash, R.D.M.; O'Brien, C.M.

    2003-01-01

    The daily mortality rate of cohorts of plaice eggs in the Irish Sea is estimated throughout the spawning season in 1995 and 2000, using general additive models of egg production. Daily mortality (z) was found to vary between 0.15 and 0.29. Mortality rates declined through the season in 1995 but not

  3. A model for persistency of egg production

    NARCIS (Netherlands)

    Grossman, M.; Gossman, T.N.; Koops, W.J.

    2000-01-01

    The objectives of our study were to propose a new definition for persistency of egg production and to develop a mathematical model to describe the egg production curve, one that includes a new measure for persistency, based on the proposed definition, for use as a selection criterion to improve

  4. Measuring Steroid Hormones in Avian Eggs

    NARCIS (Netherlands)

    Engelhardt, Nikolaus von; Groothuis, Ton G.G.

    2005-01-01

    Avian eggs contain substantial levels of various hormones of maternal origin and have recently received a lot of interest, mainly from behavioral ecologists. These studies strongly depend on the measurement of egg hormone levels, but the method of measuring these levels has received little

  5. Measuring steroid hormones in avian eggs

    NARCIS (Netherlands)

    Von Engelhardt, Nikolaus; Groothuis, Ton G. G.; Bauchinger, U; Goymann, W; JenniEiermann, S

    2005-01-01

    Avian eggs contain substantial levels of various hormones of maternal origin and have recently received a lot of interest, mainly from behavioral ecologists. These studies strongly depend on the measurement of egg hormone levels, but the method of measuring these levels has received little

  6. U.S. Army Deployment Resilience & Retention: Wave II

    Science.gov (United States)

    2014-08-04

    extended tours, absence from the family for extended periods of time, and in some cases disability or death (Drummet, Coleman & Cable, 2003; Ruger...and retention in the armed forces ( Griffith , Rakoff, & Helms, 1993; Hoge et al., 2002). We believe we have begun to address this shortfall in an...Military Medicine, 162, 283-287. Drummet, A.R., Coleman , M., & Cable, S. (2003). Military families under stress: Implications for family life

  7. Locator Versus Bar Attachment Effect on the Retention and Stability of Implant-Retained Maxillary Overdenture: An In Vitro Study.

    Science.gov (United States)

    ELsyad, Moustafa Abdou; Dayekh, Mahmoud Abdehamid; Khalifa, Ahmed Khalifa

    2017-04-07

    To compare retention and stability of Locator and bar attachments for implant-retained maxillary overdentures. Four implants were inserted into a maxillary acrylic resin model in canines and second premolar areas. Experimental overdentures were connected to the implants with bar (group I) or Locator (group II) attachments. Locators were divided into 3 subgroups according the degree of retention of the patrix nylon insert: Locator blue (group IIa), Locator pink (group IIb), and Locator transparent (group IIc). Retention (vertical dislodging) and stability (lateral, anterior, posterior dislodging) forces (N) were measured at the start of the experiment (initial retention) and after 540 cycles of denture insertion and removal (final retention). The highest initial and final stability was recorded with group IIc, followed by group IIb and group IIa, and the lowest retention and stability was noted with group I. For all groups, the highest final retention and stability forces were noted with vertical dislodging, followed by posterior dislodging, anterior dislodging, and lateral dislodging. The highest loss of retention and stability was recorded with group I, followed by group IIc, group IIb, and group IIa. Locator attachments are recommended to retain maxillary overdentures over Dolder bar attachments, as Locator attachments were associated with high retention and stability after wear simulation with minimal retention loss. © 2017 by the American College of Prosthodontists.

  8. 9 CFR 56.7 - Mortgage against poultry or eggs.

    Science.gov (United States)

    2010-01-01

    ... PATHOGENIC AVIAN INFLUENZA § 56.7 Mortgage against poultry or eggs. When poultry or eggs have been destroyed... holding a mortgage on the poultry or eggs must sign the APHIS-furnished form, consenting to the payment of...

  9. Are Chicken Eggs Good or Bad for My Cholesterol?

    Science.gov (United States)

    ... good or bad for my cholesterol? Are chicken eggs good or bad for my cholesterol? Answers from Francisco Lopez-Jimenez, M.D. Chicken eggs are high in cholesterol, but the effect of egg consumption on blood ...

  10. Iodine in eggs in an iodopenic region

    International Nuclear Information System (INIS)

    Bogdanov, Bogdan; Gonev, Mihail; Tadzher, Isak S.

    1996-01-01

    Macedonia is a region with a recognized precarious iodine balance, due to iodine deficiency in almost all water sources. Five percent iodine intake through eggs in the daily diet of adults is significant in this balance. The content of 40-220 micro g I - /kg eggs is lower than the British one (average 340-370 micro g I - /kg). The amount per egg is 3-6 micro g I' far less than 711 micro g I - in special iodine-enriched eggs designed for treatment of thyroid and metabolic disorders by feeding chickens with kelp additives. The iodine content of our manufacturers, provides substantial part of former Yugoslavia with eggs, is entirely dependent on imported fishmeal in chicken feed. (Author)

  11. Fast egg collection method greatly improves randomness of egg sampling in Drosophila melanogaster

    DEFF Research Database (Denmark)

    Schou, Mads Fristrup

    2013-01-01

    When obtaining samples for population genetic studies, it is essential that the sampling is random. For Drosophila, one of the crucial steps in sampling experimental flies is the collection of eggs. Here an egg collection method is presented, which randomizes the eggs in a water column and dimini......When obtaining samples for population genetic studies, it is essential that the sampling is random. For Drosophila, one of the crucial steps in sampling experimental flies is the collection of eggs. Here an egg collection method is presented, which randomizes the eggs in a water column...... and to obtain a representative collection of genotypes, the method presented here is strongly recommended when collecting eggs from Drosophila....

  12. Dispersion Forces

    CERN Document Server

    Buhmann, Stefan Yoshi

    2012-01-01

    In this book, a modern unified theory of dispersion forces on atoms and bodies is presented which covers a broad range of advanced aspects and scenarios. Macroscopic quantum electrodynamics is shown to provide a powerful framework for dispersion forces which allows for discussing general properties like their non-additivity and the relation between microscopic and macroscopic interactions. It is demonstrated how the general results can be used to obtain dispersion forces on atoms in the presence of bodies of various shapes and materials. Starting with a brief recapitulation of volume I, this volume II deals especially with bodies of irregular shapes, universal scaling laws, dynamical forces on excited atoms, enhanced forces in cavity quantum electrodynamics, non-equilibrium forces in thermal environments and quantum friction. The book gives both the specialist and those new to the field a thorough overview over recent results in the field. It provides a toolbox for studying dispersion forces in various contex...

  13. Bioresonance method influencing the egg quality

    International Nuclear Information System (INIS)

    Avakova, A.; Kovalev, Yu.

    2009-01-01

    At 2 poultry yards with capacity of 30 thousand laying hens an experiment was undertaken to study the bioresonance effect on 18-week-old poultry (experimental poultry yard, EPY) to obtain eggs of high biological value by activating the assimilation by poultry of a microelement complex from food. At the EPY hens received a vitamin-mineral complex Lifepac senior (produced in France) treated with electromagnetic radiation. At the control poultry yard (CPY) this method was not used. The first egg collection was conducted from hens at the age of 28 weeks, the second one – at the age of 3-4 weeks and the third one – at the age of 52 weeks. The keeping and feeding conditions at the two poultry yards were the same. The contents of water, protein, fat in the eggs of CPY and EPY were practically the same, but the level of microelements in the EPY eggs was higher than in CPY eggs. It was observed so as to maintain high level of microelements in eggs it is required to a bioresonance effect throughout the egg laying period. So, the level of manganese in eggs of EPY and CPY at week 52 was 0.024 and 0.003 mg%, iron – 3.74 and 1.48 mg%, zinc – 1.23 and 0.87 mf%, copper – 0.078 and 0.069 mg%, respectively. The transition of microelements from food into eggs also was % to the control: iron – 2.55, manganese – 10.0, zinc – 1.44, copper – 1.35, potassium – 1.33, calcium – 1.05, phosphorus – 1.15, sodium – 1.16. Thus, the bioresonance method for keeping laying hens makes it possible to obtain food eggs of the desired chemical composition

  14. Light dulls and darkens bird eggs.

    Directory of Open Access Journals (Sweden)

    Johanna Y Navarro

    Full Text Available Although egg color is generally consistent within individual birds and robust to environmental variation, recent evidence suggests a degree of susceptibility to environmental perturbation or modulation of egg color. Most of this variation manifests via the physiology of the laying female, but some direct impacts of the environment on laid eggs have also been discovered. Here we test whether light changes bird egg color and we quantify its effect, by subjecting variable blue-green eggs of Rüppell's weaver (Ploceus galbula to a broad-spectrum light source under laboratory conditions, and measuring egg reflectance every few hours. Eggshells gradually decreased in reflectance across the entire measured wavelength spectrum of 250-800 nm. Reflectance peaks were disproportionately affected, such that the height decreased of both the blue-green peak and the smaller UV peak typical of blue-green eggs. The reflectance of lighter eggs was affected slightly more than that of darker eggs. These changes are similar to previous results for changes over long periods of time in darkness, suggesting that light might hasten the same process of pigment degradation that proceeds even without light. Comparison between the experimental light source and both sunlight and typical artificial lighting situations raises the possibility that significant color change might occur during incubation in some birds, but indicates that eggshell illumination in museums for short periods of study is unlikely to affect their color to a detectable extent. Additional research should be performed on eggs of other species and in other light environments, with an eye to an eventual generalized model of the effect of light on eggshell color.

  15. Divertor retention for recycling impurities

    International Nuclear Information System (INIS)

    Krieger, K.; Roth, J.; Fussmann, G.

    1992-01-01

    As an important issue for fusion devices with divertor configurations the retention capability for both recycling and non-recycling impurities receives increasing interest. In the case of recycling, gaseous, impurities the retention capability is usually investigated by means of short impurity gas puffs into the plasma vessel and the analysis of the time dependence of the observed line radiation. The detailed understanding of the impurity transport processes related to the retention capability of a certain divertor structure will require modelling of the experimental results with 2D or 3D transport code simulations. However, for the comparison of the global behavior of different configurations a much simpler description of the divertor retention in terms of global time constants may be sufficient. We will give a summary of experimental results from ASDEX for the dependence of the retention capability on parameters like divertor plasma density and temperature and the distance along field lines between main plasma and divertor. In addition we will compare some of these results with similar experiments on DIIID. (author) 8 refs., 2 figs., 2 tabs

  16. BEHAVIOR OF CRACKED EGGS AT NON – DESTRUCTIVE IMPACT

    Directory of Open Access Journals (Sweden)

    Jana Strnková

    2014-02-01

    Full Text Available The influence of cracks on the dynamical frequency response of eggshells was studied. The non-destructive impact tests of the intact and cracked eggs were performed. Record of impact force time history was enabled by experimental device. Response of eggshell to the impact was described by the surface displacement of the eggshell. This response was measured by the laser interferometry. The force and response were also expressed in the frequency domain using of the fast Fourier transform. Both time and frequency response were affected by the presence of cracks. It was shown that the influence of cracks on the eggshell response was more effectively described in the frequency domain. The frequency response was relatively very sensitive to the position and orientation of cracks. The frequency response function was characterized by many peaks. Five excitation resonant frequency characteristic of signals were extracted based on the difference of frequency domain response signals. Distinction between intact and cracked eggs was enabled by these parameters. Even if some main problems were solved some of them remained unsolved. One of them was the effect of the impacting body r shape. This problem could be effectively solved namely using of numerical methods. In order to describe the response of eggshell response to the non-destructive impact using of the numerical simulation exact description of eggshell shape was performed. This numerical simulation will be subject of forthcoming paper.

  17. Comparison of the effects of two bongo net mesh sizes on the estimation of abundance and size of Engraulidae eggs

    Directory of Open Access Journals (Sweden)

    Jana Menegassi del Favero

    2015-06-01

    Full Text Available Abstract Studies of ichthyoplankton retention by nets of different mesh sizes are important because they help in choosing a sampler when planning collection and the establishment of correction factors. These factors make it possible to compare studies performed with nets of different mesh sizes. In most studies of mesh retention of fish eggs, the taxonomic identification is done at the family level, resulting in the loss of detailed information. We separated Engraulidae eggs, obtained with 0.333 mm and 0.505 mm mesh bongo nets at 172 oceanographic stations in the southeastern Brazilian Bight, into four groups based on their morphometric characteristics. The difference in the abundance of eggs caught by the two nets was not significant for those groups with highest volume, types A and B, but in type C (Engraulis anchoita, the most eccentric, and in type D, of the smallest volume, the difference was significant. However, no significant difference was observed in the egg size sampled with each net for E. anchoita and type D, which exhibited higher abundance in the 0.333 mm mesh net and minor axis varying from 0.45-0.71 mm, smaller than the 0.505 mm mesh aperture and the mesh diagonal.

  18. Retention and wear behaviors of two implant overdenture stud-type attachments at different implant angulations.

    Science.gov (United States)

    Choi, Jae-Won; Bae, Ji-Hyeon; Jeong, Chang-Mo; Huh, Jung-Bo

    2017-05-01

    Implant angulation should be considered when selecting an attachment. Some in vitro studies have investigated the relationship between implant angulation and changes in the retention force of the stud attachment, but few studies have evaluated the effect of cyclic loading and repeated cycles of insertion and removal on the stud attachment. The purpose of this in vitro study was to evaluate the effects of implant angulation on the retentive characteristics of overdentures with 2 different stud attachments, an experimental system and O-rings in red and orange, after cyclic loading and repeated insertion and removal cycles. The canine region of a mandibular experimental model was fitted with 2 implant fixtures with 2 different stud attachment systems at implant angulations of 0, 15, or 30 degrees. A mastication simulator was used to simulate cyclic loading, and a universal testing machine was used to evaluate retentive force changes after repeated insertion and removal cycles. To simulate the numbers of mastication and insertion and removal cycles per annum, 400000 cyclic loadings and 1080 insertion and removal cycles were performed. Wear patterns and attachment surface deformations were evaluated by scanning electron microscopy. Data were analyzed using the Kruskal-Wallis test, Mann-Whitney U test with Bonferroni correction (α=.05/3=.017), and the paired-sample Student t test (α=.05). When retentive forces before and after testing were compared, O-ring showed significant retention loss at all implant angulations (P.05), whereas the 30-degree model showed a significant increase in retentive force (P=.001). At all implant angulations, retention loss increased significantly for the orange O-ring, followed by the red O-ring, and the experimental system (Pattachment systems. Even when implants are not installed in parallel, the experimental system can be used without involving great loss of retention. Copyright © 2016 Editorial Council for the Journal of Prosthetic

  19. Effects of Hen Age and Egg Weight Class on the Hatchability of Free Range Indigenous Chicken Eggs

    OpenAIRE

    Abudabos, AM; Aljumaah, RS; Algawaan, AS; Al-Sornokh, H; Al-Atiyat, RM

    2017-01-01

    ABSTRACT In total, 806 eggs of free-range Hassawi indigenous chickens were collected from local farm in Saudi Arabia. Eggs were weekly collected for 11 weeks. Initial egg weight (IEW) was recorded, and eggs were graded into four classes (A: 35-40 g, B: 40-45 g, C: 45-50 g, and D: 50-55 g). Eggs were stored for seven days at 75-80% relative humidity and 14-16 C, after which egg weight losses (WL0) were calculated. During incubation, eggs were weighed on days 7 (W7) and 14 (W14), and egg weight...

  20. As the egg turns: monitoring egg attendance behavior in wild birds using novel data logging technology.

    Science.gov (United States)

    Shaffer, Scott A; Clatterbuck, Corey A; Kelsey, Emma C; Naiman, Alex D; Young, Lindsay C; VanderWerf, Eric A; Warzybok, Pete; Bradley, Russell; Jahncke, Jaime; Bower, Geoff C

    2014-01-01

    Egg turning is unique to birds and critical for embryonic development in most avian species. Technology that can measure changes in egg orientation and temperature at fine temporal scales (1 Hz) was neither readily available nor small enough to fit into artificial eggs until recently. Here we show the utility of novel miniature data loggers equipped with 3-axis (i.e., triaxial) accelerometers, magnetometers, and a temperature thermistor to study egg turning behavior in free-ranging birds. Artificial eggs containing egg loggers were deployed in the nests of three seabird species for 1-7 days of continuous monitoring. These species (1) turned their eggs more frequently (up to 6.5 turns h(-1)) than previously reported for other species, but angular changes were often small (1-10° most common), (2) displayed similar mean turning rates (ca. 2 turns h(-1)) despite major differences in reproductive ecology, and (3) demonstrated distinct diurnal cycling in egg temperatures that varied between 1.4 and 2.4 °C. These novel egg loggers revealed high-resolution, three-dimensional egg turning behavior heretofore never measured in wild birds. This new form of biotechnology has broad applicability for addressing fundamental questions in avian breeding ecology, life history, and development, and can be used as a tool to monitor birds that are sensitive to disturbance while breeding.

  1. As the egg turns: monitoring egg attendance behavior in wild birds using novel data logging technology.

    Directory of Open Access Journals (Sweden)

    Scott A Shaffer

    Full Text Available Egg turning is unique to birds and critical for embryonic development in most avian species. Technology that can measure changes in egg orientation and temperature at fine temporal scales (1 Hz was neither readily available nor small enough to fit into artificial eggs until recently. Here we show the utility of novel miniature data loggers equipped with 3-axis (i.e., triaxial accelerometers, magnetometers, and a temperature thermistor to study egg turning behavior in free-ranging birds. Artificial eggs containing egg loggers were deployed in the nests of three seabird species for 1-7 days of continuous monitoring. These species (1 turned their eggs more frequently (up to 6.5 turns h(-1 than previously reported for other species, but angular changes were often small (1-10° most common, (2 displayed similar mean turning rates (ca. 2 turns h(-1 despite major differences in reproductive ecology, and (3 demonstrated distinct diurnal cycling in egg temperatures that varied between 1.4 and 2.4 °C. These novel egg loggers revealed high-resolution, three-dimensional egg turning behavior heretofore never measured in wild birds. This new form of biotechnology has broad applicability for addressing fundamental questions in avian breeding ecology, life history, and development, and can be used as a tool to monitor birds that are sensitive to disturbance while breeding.

  2. The Effect of Oregano Essential Oil and Pollen on Egg Production and Egg Yolk Qualitative Parameters

    Directory of Open Access Journals (Sweden)

    Henrieta Arpášová

    2013-05-01

    Full Text Available Phytobiotics are defined as products derived from plants, which may have a beneficial effect on the gastrointestinal microflora of animals, performance and quality of animal products. In this experiment the effects of supplementation of the diet for laying hens with oregano essential oil and pollen extract addition on egg production and physical egg yolk parameters were studied. Hens of laying hybrid Hy-Line Brown (n=30 were randomly divided into 3 groups (n=10 and fed for 23 weeks with diets with oregano essential oil and pollen supplemented. In the control group hens received feed mixture with no additions. The diets in the first experimental groups was supplemented with 0.25 g/kg oregano essential oil. The feed for second experimental groups of birds consisted of basal diet supplemented with pollen extract of the same dose at 0.4 g/kg. Number of eggs per hen during the reporting period in order of the groups: 135.6, 136.7 and 138.5 units, at an average intensity of laying 90.4, 91.13 and 92.33%. The results suggest that the egg production, egg mass, egg weight and all of qualitative parameters of egg yolk (egg yolk weight (g, egg yolk index, egg yolk colour (°HLR were not significantly influenced with oregano oil or pollen addition (P>0.05.

  3. As the Egg Turns: Monitoring Egg Attendance Behavior in Wild Birds Using Novel Data Logging Technology

    Science.gov (United States)

    Shaffer, Scott A.; Clatterbuck, Corey A.; Kelsey, Emma C.; Naiman, Alex D.; Young, Lindsay C.; VanderWerf, Eric A.; Warzybok, Pete; Bradley, Russell; Jahncke, Jaime; Bower, Geoff C.

    2014-01-01

    Egg turning is unique to birds and critical for embryonic development in most avian species. Technology that can measure changes in egg orientation and temperature at fine temporal scales (1 Hz) was neither readily available nor small enough to fit into artificial eggs until recently. Here we show the utility of novel miniature data loggers equipped with 3-axis (i.e., triaxial) accelerometers, magnetometers, and a temperature thermistor to study egg turning behavior in free-ranging birds. Artificial eggs containing egg loggers were deployed in the nests of three seabird species for 1–7 days of continuous monitoring. These species (1) turned their eggs more frequently (up to 6.5 turns h−1) than previously reported for other species, but angular changes were often small (1–10° most common), (2) displayed similar mean turning rates (ca. 2 turns h−1) despite major differences in reproductive ecology, and (3) demonstrated distinct diurnal cycling in egg temperatures that varied between 1.4 and 2.4°C. These novel egg loggers revealed high-resolution, three-dimensional egg turning behavior heretofore never measured in wild birds. This new form of biotechnology has broad applicability for addressing fundamental questions in avian breeding ecology, life history, and development, and can be used as a tool to monitor birds that are sensitive to disturbance while breeding. PMID:24887441

  4. Scrambled eggs: Proteomic portraits and novel biomarkers of egg quality in zebrafish (Danio rerio).

    Science.gov (United States)

    Yilmaz, Ozlem; Patinote, Amélie; Nguyen, Thao Vi; Com, Emmanuelle; Lavigne, Regis; Pineau, Charles; Sullivan, Craig V; Bobe, Julien

    2017-01-01

    Egg quality is a complex biological trait and a major determinant of reproductive fitness in all animals. This study delivered the first proteomic portraits of egg quality in zebrafish, a leading biomedical model for early development. Egg batches of good and poor quality, evidenced by embryo survival for 24 h, were sampled immediately after spawning and used to create pooled or replicated sample sets whose protein extracts were subjected to different levels of fractionation before liquid chromatography and tandem mass spectrometry. Obtained spectra were searched against a zebrafish proteome database and detected proteins were annotated, categorized and quantified based on normalized spectral counts. Manually curated and automated enrichment analyses revealed poor quality eggs to be deficient of proteins involved in protein synthesis and energy and lipid metabolism, and of some vitellogenin products and lectins, and to have a surfeit of proteins involved in endo-lysosomal activities, autophagy, and apoptosis, and of some oncogene products, lectins and egg envelope proteins. Results of pathway and network analyses suggest that this aberrant proteomic profile results from failure of oocytes giving rise to poor quality eggs to properly transit through final maturation, and implicated Wnt signaling in the etiology of this defect. Quantitative comparisons of abundant proteins in good versus poor quality eggs revealed 17 candidate egg quality markers. Thus, the zebrafish egg proteome is clearly linked to embryo developmental potential, a phenomenon that begs further investigation to elucidate the root causes of poor egg quality, presently a serious and intractable problem in livestock and human reproductive medicine.

  5. Diet shifts during egg laying: Implications for measuring contaminants in bird eggs

    International Nuclear Information System (INIS)

    Morrissey, Christy A.; Elliott, John E.; Ormerod, Stephen J.

    2010-01-01

    We combined stable isotope tracers of blood plasma, blood cells and egg contents with faecal analysis during pre-breeding and egg laying phases in two dipper species Cinclus cinclus and Cinclus mexicanus to determine the occurrence of dietary shifts during egg production and to assess consequences for egg contaminant loads. In both species, changes in δ 13 C (C. cinclus) or δ 15 N (C. mexicanus) in female plasma relative to red blood cells indicated a dietary shift during laying that was not observed in males. Eurasian dippers increased prey consumption as breeding approached, shifting from primarily trichopteran insect larvae to ephemeropterans and plecopterans. In American dippers, egg-laying females switched to feeding at a higher trophic level by consuming more fish. Eggs derived from higher trophic level diets contained more mercury (American dipper), polychlorinated biphenyls and some organochlorines, especially DDT metabolites. The results demonstrate how dietary changes during egg laying accompany the demands for egg production with consequences for contaminant deposition in avian eggs. - Changes in laying diet influences contaminant deposition in bird eggs.

  6. Forced marriage.

    Science.gov (United States)

    2007-06-01

    Guidelines to help A&E staff and other healthcare professionals who suspect cases of forced marriage were launched this month by the government. The guidelines provide practical advice on how to recognise the warning signs, and what to do if patients disclose that they have been, or are about to be, forced to marry. The guidelines, Dealing with Cases of Forced Marriage, are available at www.fco.gov.uk/forcedmarriage.

  7. Method of Retention Control for Compromised Periodontal Bone Support Abutment of Conical Crown Retained Denture

    Directory of Open Access Journals (Sweden)

    Chau-Hsiang Wang

    2010-08-01

    Full Text Available Conical crown-retained dentures (CCRD show a higher survival rate and greater patient satisfaction than transitional removable partial dentures during long-term follow-up. However, unsustainable denture retention force on supporting abutments after initial delivery and loss retention are frequently seen in long-term follow-up of clinical cases. The main causes are insufficient information concerning denture retention designs and the retention-tolerance of the supporting abutments. Monitoring by dental technicians of the quality of dental prostheses is critical. This case report describes an optimal method for CCRD construction that determines and distributes an optimal denture retention force on the supporting abutments to allow the patient to easily remove the denture while ensuring that the CCRD remains in place during physiologic activities. Oral rehabilitation with CCRD should consider the condition of the abutment periodontal support, the interarch occlusal relationship, supplemental fatigue of the terminal abutment, and patient's estimated bite force. The effects of friction on the abutment's inner crown were based on an optimal a angle. The dental laboratory used these measurements to fabricate a CCRD using a Koni-Meter to adjust the retention of the inner crown. This method protects the abutments and reduces the wear between the inner and outer crowns. The CCRD achieved good esthetic results and physiologic functions. Periodic long-term follow-up of the patient and CCRD after initial placement is recommended.

  8. Job embeddedness factors and retention of nurses with 1 to 3 years of experience.

    Science.gov (United States)

    Halfer, Diana

    2011-10-01

    An aging work force, predictions of job growth in health care, and an eventual economic recovery suggest that the current reprieve from the national nursing shortage is temporary. New graduate nurses are an important part of the work force and are needed to replace nurses who will retire in the next decade. Organizational leaders can address the forecasted work force demand by proactively investing in programs for workplace development and retention. Recent literature reports an increased focus on understanding the work experience and career support needed for new graduate nurses. Several studies report improvements in job satisfaction and retention after implementation of structured mentoring programs for new graduate nurses. However, despite successful transition programs, turnover for these same nurses after 1 to 3 years of organizational tenure remains high. Studying factors that contribute to retention and supporting careers beyond the first year of practice may have a significant effect on improving retention and will contribute new knowledge to the nursing literature. This study, undertaken at a Midwestern pediatric academic medical center, examined job factors and career development support that lead to retention of nurses with 1 to 3 years of experience. Understanding these issues may guide nursing leaders and staff development educators in investing in focused retention and career development plans during an economic recession. Copyright 2011, SLACK Incorporated.

  9. Transfer of thiocyanate into chicken eggs

    Energy Technology Data Exchange (ETDEWEB)

    Carew, S.N.; Davis, R.H.; Sykes, A.H.

    1986-01-01

    Laying hens were fed thiocyanate (SCN) as a solution of potassium thiocyanate (KSCN) in their drinking water to determine whether dietary SCN was transferred into eggs. The thiocyanate content of their eggs was measured before and during thiocyanate administration. Egg thiocyanate content increased from 6 ..mu..g SCN/g albumen to 31 ..mu..g SCN/g (a 400% increase) in the period immediately following thiocyanate administration and then fell progressively, seeming to stabilize much closer to but still well above control levels.

  10. Rotational Collision Apparatus for Indoor Egg Drops

    Science.gov (United States)

    Halada, Richard

    2003-05-01

    Our units about momentum and energy are richly illustrated with applications to car crashes and explanations of such safety features as airbags and crumple zones. The main lab exercise, however, is an egg crash (car insurance rates being so much higher). Fairly standard rules apply: Students must devise an "egg-protection package" that will keep a teacher-supplied egg intact through two successive impacts. After the test, they must hand in a written analysis of the specific physics principles they employed, modifications they would make after seeing their project's actual performance, and suggestions for applying their protection system to auto safety.

  11. Maternal transfer of mercury to songbird eggs.

    Science.gov (United States)

    Ackerman, Joshua T; Hartman, C Alex; Herzog, Mark P

    2017-11-01

    We evaluated the maternal transfer of mercury to eggs in songbirds, determined whether this relationship differed between songbird species, and developed equations for predicting mercury concentrations in eggs from maternal blood. We sampled blood and feathers from 44 house wren (Troglodytes aedon) and 34 tree swallow (Tachycineta bicolor) mothers and collected their full clutches (n = 476 eggs) within 3 days of clutch completion. Additionally, we sampled blood and feathers from 53 tree swallow mothers and randomly collected one egg from their clutches (n = 53 eggs) during mid to late incubation (6-10 days incubated) to evaluate whether the relationship varied with the timing of sampling the mother's blood. Mercury concentrations in eggs were positively correlated with mercury concentrations in maternal blood sampled at (1) the time of clutch completion for both house wrens (R 2  = 0.97) and tree swallows (R 2  = 0.97) and (2) during mid to late incubation for tree swallows (R 2  = 0.71). The relationship between mercury concentrations in eggs and maternal blood did not differ with the stage of incubation when maternal blood was sampled. Importantly, the proportion of mercury transferred from mothers to their eggs decreased substantially with increasing blood mercury concentrations in tree swallows, but increased slightly with increasing blood mercury concentrations in house wrens. Additionally, the proportion of mercury transferred to eggs at the same maternal blood mercury concentration differed between species. Specifically, tree swallow mothers transferred 17%-107% more mercury to their eggs than house wren mothers over the observed mercury concentrations in maternal blood (0.15-1.92 μg/g ww). In contrast, mercury concentrations in eggs were not correlated with those in maternal feathers and, likewise, mercury concentrations in maternal blood were not correlated with those in feathers (all R 2  mercury concentrations from maternal blood to eggs

  12. Physical properties evaluation of roselle extract-egg white mixture under various drying temperatures

    Science.gov (United States)

    Triyastuti, M. S.; Kumoro, A. C.; Djaeni, M.

    2017-03-01

    Roselle contains anthocyanin that is potential for food colorant. Occasionally, roselle extract is provided in dry powder prepared under high temperature. In this case, the anthocyanin color degrades due to the intervention of heat. The foammat drying with egg white is a potential method to speed up the drying process as well as minimize color degradation. This research aims to study the physical properties of roselle extract under foam mat drying. As indicators, the powder size and color intensity were observed. The result showed that at high temperatures, roselle powder under foam mat drying has the fine size with porous structure. However, at the higher the drying temperature the color retention decreased.

  13. Retention-Oriented Curricular Design

    Science.gov (United States)

    Milanovic, Ivana; Eppes, Tom A.; Girouard, Janice; Townsend, Lee

    2010-01-01

    This paper presents a retention-oriented approach to the educational value stream within the STEM undergraduate area. Faced with several strategic challenges and opportunities, a Flex Advantage Plan was developed to enhance the undergraduate engineering technology programs and better utilize the curricular flexibilities inherent in the current…

  14. Strategies for improving employee retention.

    Science.gov (United States)

    Verlander, Edward G; Evans, Martin R

    2007-03-28

    This article proposes a solution to the perennial problem of talent retention in the clinical laboratory. It includes the presentation of 12 strategies that may be used to significantly improve institutional identity formation and establishment of the psychological contract that employees form with laboratory management. Identity formation and psychological contracting are deemed as essential in helping reduce employee turnover and increase retention. The 12 conversational strategies may be used as a set of best practices for all employees, but most importantly for new employees, and should be implemented at the critical moment when employees first join the laboratory. This time is referred to as "retention on-boarding"--the period of induction and laboratory orientation. Retention on-boarding involves a dialogue between employees and management that is focused on the psychological, practical, cultural, and political dimensions of the laboratory. It is placed in the context of the modern clinical laboratory, which is faced with employing and managing Generation X knowledge workers. Specific topics and broad content areas of those conversations are outlined.

  15. Institutionalization of a Retention Model

    Science.gov (United States)

    Davis, E. J.; Campbell, A.

    2006-05-01

    Bowie State University and NASA Goddard Space Flight Center have, for the past 10 years, worked diligently together to enhance the science, mathematics, engineering and technology (SMET) domain. Efforts made, because of a Model Institutions for Excellence (MIE) Award, have changed the landscape of the SMET domain by increasing the retention and graduation rates, the number of students entering graduate and professional schools, and the number of students entering SMET related careers for minorities and women. Several initiatives a Scholarship Program, PRISEM Tutoring Center, Safety-net Program, Research emphasis, Focused Mentoring, a Summer Academy for accepted incoming students, a Bridge Program for students needing assistance being admitted to the University, the RISE Program and the Bowie State Satellite Operations and Control Center (BSOCC) provide the nurturing, mentoring, and opportunities for our students. As a result of efforts made, the retention rate has increase to approximately 80%, the graduation rate has increased 40%, and 85% of the SMET students are now interested or entering graduate and professional schools. Successes that have been documented by various assessment activities have led to the institutionalization of the Retention Model of the MIE Initiative. It is anticipated that University-wide application of the retention model will prove the incentives necessary to obtain similar results as the MIE Initiative.

  16. Exploring General Education Development Retention

    Science.gov (United States)

    Grover, Sharon D.

    2013-01-01

    According to the instructors and administrators at a local adult education (AE) program in Houston, Texas, retaining and graduating general education development (GED) students has been a constant challenge. Locating GED attendance barriers could enable AE programs to develop techniques that increase student retention and graduation rates. The…

  17. Maslow's Hierarchy and Student Retention.

    Science.gov (United States)

    Brookman, David M.

    1989-01-01

    Abraham Maslow's hierarchy of needs offers perspective on student motivation and a rationale for college retention programing. Student affairs and faculty interventions addressing student safety needs and engaging students' sense of purpose reinforce persistence. A mentor program is a possible cooperative effort between student personnel and…

  18. [Gastroduodenal intussusception causing gastric retention.

    DEFF Research Database (Denmark)

    Alamili, M.; Berg, J.O.; Lindstrom, C.

    2008-01-01

    A case of gastroduodenal intussusception caused by a duodenal lipoma is presented. The condition was characterized by severe upper gastrointestinal retention, epigastric pain and weight loss. The mass was diagnosed by CT scan. The diagnosis was confirmed by operation. The patient was treated...

  19. Impact of egg disinfection of hatching eggs on the eggshell microbiome and bacterial load

    DEFF Research Database (Denmark)

    Olsen, R.; Kudirkiene, E.; Thofner, I.

    2017-01-01

    Disinfection of hatching eggs is essential to ensure high quality production of broilers. Different protocols are followed in different hatcheries; however, only limited scientific evidence on how the disinfection procedures impact the microbiome is available. The aim of the present study...... was to characterize the microbiome and aerobic bacterial load of hatching eggs before disinfection and during the subsequent disinfection steps. The study included a group of visibly clean and a group of visibly dirty eggs. For dirty eggs, an initial wash in chlorine was performed, hereafter all eggs were submitted...... to two times fumigation and finally spray disinfection. The eggshell microbiome was characterized by sequencing of the total amount of 16S rRNA extracted from each sample, consisting of shell surface swabs of five eggs from the same group. In addition, the number of colony forming units (cfu) under...

  20. Different forces

    CERN Multimedia

    1982-01-01

    The different forces, together with a pictorial analogy of how the exchange of particles works. The table lists the relative strength of the couplings, the quanta associated with the force fields and the bodies or phenomena in which they have a dominant role.

  1. The influence of a light and dark cycle on the egg laying activity of Aedes aegypti (Linnaeus, 1762 (Diptera: Culicidae

    Directory of Open Access Journals (Sweden)

    Luana Cristina Farnesi

    2018-02-01

    Full Text Available BACKGROUND The epidemiological importance of the mosquito Aedes aegypti as a vector of multiple human pathogens has generated a growing number of studies on the physiology and behaviour of its blood-feeding females. The activity of oviposition is one of the critical elements contributing to the expansion of Ae. aegypti's populations. Although there is a vast literature about oviposition behaviour, significant specific knowledge about egg viability and female fertility under light and dark conditions is still lacking. OBJECTIVES We studied, in controlled laboratory conditions, the effect that light and dark cycles have on the efficiency of oviposition by Ae. aegypti females. METHODS Physiological assays were performed using synchronised eggs obtained from forced egg laying. The number and viability of eggs was analysed under three different light/dark regimes: LD12:12 (12 h of light and 12 h of dark, DD (constant darkness and LL (constant light. FINDINGS and CONCLUSIONS Our results show that females prefer to lay their eggs in dark conditions, but maximising the number and viability of eggs requires the occurrence of a light/dark cycle. Ongoing research on this theme has the potential of contributing to the proposition of new strategies for control based on the failure of egg laying and hatching.

  2. Scrambled eggs: Proteomic portraits and novel biomarkers of egg quality in zebrafish (Danio rerio)

    OpenAIRE

    Yilmaz, Ozlem; Patinote, Amélie; Nguyen, Thuy Thao Vi; Com, Emmanuelle; Lavigne, Regis; Pineau, Charles; Sullivan, Craig V.; Bobe, Julien

    2017-01-01

    Egg quality is a complex biological trait and a major determinant of reproductive fitness in all animals. This study delivered the first proteomic portraits of egg quality in zebrafish, a leading biomedical model for early development. Egg batches of good and poor quality, evidenced by embryo survival for 24 h, were sampled immediately after spawning and used to create pooled or replicated sample sets whose protein extracts were subjected to different levels of fractionation before liquid chr...

  3. Modeling the Transport Success and Retention of Anchovy (Engraulis anchoita) Early Stages in the Southern Brazilian Shelf

    Science.gov (United States)

    Vaz, A.; Parada, C.; Palma, E. D.; Muelbert, J. H.; Campos, E. D.

    2005-05-01

    The Southern Brazilian Shelf (SBS) is one of the most productive fishing areas in the Southwestern Atlantic. Eggs and larvae of about 88 fish species distributed among 48 families occur in the plankton community in this area. The processes involving the circulation in this area and its influence on eggs/larvae transport are poorly understood. Recent studies described the spawning activity of anchovy relating it to oceanographic processes. These studies suggest that the predominant onshore Ekman transport, which occurs mainly in the winter and spring periods, keeps the eggs and larvae in coastal areas. It is also known that the continental runoff is a primary factor to the formation of a retention zone for planktonic organisms over the SBS. The formation of a stagnant zone, where the residual currents are weak, favors the patchiness character of plankton communities and nutrients. In our ongoing study we investigate with data and model the dispersion pattern of eggs/larvae of Engraulis anchoita in this region, considering both biological and physical processes. In the modelling approach, surface velocity fields from runs with the Princeton Ocean Model (POM) are used as input data for an Individual Based Model (IBM). This IBM treats every single particle as an individual with its own features, tracking particles (eggs/larvae) trajectories using a Runge-Kutta scheme for spatial interpolation. The analyses of our preliminary results seems to confirm the expected pattern in which the majority of eggs and larvae are transported to their nursery grounds, remaining in these areas.

  4. Oocyte cryopreservation for donor egg banking.

    Science.gov (United States)

    Cobo, Ana; Remohí, José; Chang, Ching-Chien; Nagy, Zsolt Peter

    2011-09-01

    Oocyte donation is an efficient alternative to using own oocytes in IVF treatment for different indications. Unfortunately, 'traditional' (fresh) egg donations are challenged with inefficiency, difficulties of synchronization, very long waiting periods and lack of quarantine measures. Given the recent improvements in the efficiency of oocyte cryopreservation, it is reasonable to examine if egg donation through oocyte cryopreservation has merits. The objective of the current manuscript is to review existing literature on this topic and to report on the most recent outcomes from two established donor cryobank centres. Reports on egg donation using slow freezing are scarce and though results are encouraging, outcomes are not yet comparable to a fresh egg donation treatment. Vitrification on the other hand appears to provide high survival rates (90%) of donor oocytes and comparable fertilization, embryo development, implantation and pregnancy rates to traditional (fresh) egg donation. Besides the excellent outcomes, the ease of use for both donors and recipients, higher efficiency, lower cost and avoiding the problem of synchronization are all features associated with the benefit of a donor egg cryobank and makes it likely that this approach becomes the future standard of care. Oocyte donation is one of the last resorts in IVF treatment for couples challenged with infertility problems. However, traditional (fresh) egg donation, as it is performed today, is not very efficient, as typically all eggs from one donor are given to only one recipient, it is arduous as it requires an excellent synchronization between the donor and recipient and there are months or years of waiting time. Because of the development of an efficient oocyte cryopreservation technique, it is now possible to cryo-store donor (as well as non-donor) eggs, maintaining their viability and allowing their use whenever there is demand. Therefore, creating a donor oocyte cryobank would carry many advantages

  5. Experimental shifts in intraclutch egg color variation do not affect egg rejection in a host of a non-egg-mimetic avian brood parasite.

    Directory of Open Access Journals (Sweden)

    Rebecca Croston

    Full Text Available Avian brood parasites lay their eggs in the nests of other birds, and impose the costs associated with rearing parasitic young onto these hosts. Many hosts of brood parasites defend against parasitism by removing foreign eggs from the nest. In systems where parasitic eggs mimic host eggs in coloration and patterning, extensive intraclutch variation in egg appearances may impair the host's ability to recognize and reject parasitic eggs, but experimental investigation of this effect has produced conflicting results. The cognitive mechanism by which hosts recognize parasitic eggs may vary across brood parasite hosts, and this may explain variation in experimental outcome across studies investigating egg rejection in hosts of egg-mimicking brood parasites. In contrast, for hosts of non-egg-mimetic parasites, intraclutch egg color variation is not predicted to co-vary with foreign egg rejection, irrespective of cognitive mechanism. Here we tested for effects of intraclutch egg color variation in a host of nonmimetic brood parasite by manipulating egg color in American robins (Turdus migratorius, hosts of brown-headed cowbirds (Molothrus ater. We recorded robins' behavioral responses to simulated cowbird parasitism in nests where color variation was artificially enhanced or reduced. We also quantified egg color variation within and between unmanipulated robin clutches as perceived by robins themselves using spectrophotometric measures and avian visual modeling. In unmanipulated nests, egg color varied more between than within robin clutches. As predicted, however, manipulation of color variation did not affect rejection rates. Overall, our results best support the scenario wherein egg rejection is the outcome of selective pressure by a nonmimetic brood parasite, because robins are efficient rejecters of foreign eggs, irrespective of the color variation within their own clutch.

  6. Experimental Shifts in Intraclutch Egg Color Variation Do Not Affect Egg Rejection in a Host of a Non-Egg-Mimetic Avian Brood Parasite

    Science.gov (United States)

    Croston, Rebecca; Hauber, Mark E.

    2015-01-01

    Avian brood parasites lay their eggs in the nests of other birds, and impose the costs associated with rearing parasitic young onto these hosts. Many hosts of brood parasites defend against parasitism by removing foreign eggs from the nest. In systems where parasitic eggs mimic host eggs in coloration and patterning, extensive intraclutch variation in egg appearances may impair the host’s ability to recognize and reject parasitic eggs, but experimental investigation of this effect has produced conflicting results. The cognitive mechanism by which hosts recognize parasitic eggs may vary across brood parasite hosts, and this may explain variation in experimental outcome across studies investigating egg rejection in hosts of egg-mimicking brood parasites. In contrast, for hosts of non-egg-mimetic parasites, intraclutch egg color variation is not predicted to co-vary with foreign egg rejection, irrespective of cognitive mechanism. Here we tested for effects of intraclutch egg color variation in a host of nonmimetic brood parasite by manipulating egg color in American robins (Turdus migratorius), hosts of brown-headed cowbirds (Molothrus ater). We recorded robins’ behavioral responses to simulated cowbird parasitism in nests where color variation was artificially enhanced or reduced. We also quantified egg color variation within and between unmanipulated robin clutches as perceived by robins themselves using spectrophotometric measures and avian visual modeling. In unmanipulated nests, egg color varied more between than within robin clutches. As predicted, however, manipulation of color variation did not affect rejection rates. Overall, our results best support the scenario wherein egg rejection is the outcome of selective pressure by a nonmimetic brood parasite, because robins are efficient rejecters of foreign eggs, irrespective of the color variation within their own clutch. PMID:25831051

  7. Experimental shifts in intraclutch egg color variation do not affect egg rejection in a host of a non-egg-mimetic avian brood parasite.

    Science.gov (United States)

    Croston, Rebecca; Hauber, Mark E

    2015-01-01

    Avian brood parasites lay their eggs in the nests of other birds, and impose the costs associated with rearing parasitic young onto these hosts. Many hosts of brood parasites defend against parasitism by removing foreign eggs from the nest. In systems where parasitic eggs mimic host eggs in coloration and patterning, extensive intraclutch variation in egg appearances may impair the host's ability to recognize and reject parasitic eggs, but experimental investigation of this effect has produced conflicting results. The cognitive mechanism by which hosts recognize parasitic eggs may vary across brood parasite hosts, and this may explain variation in experimental outcome across studies investigating egg rejection in hosts of egg-mimicking brood parasites. In contrast, for hosts of non-egg-mimetic parasites, intraclutch egg color variation is not predicted to co-vary with foreign egg rejection, irrespective of cognitive mechanism. Here we tested for effects of intraclutch egg color variation in a host of nonmimetic brood parasite by manipulating egg color in American robins (Turdus migratorius), hosts of brown-headed cowbirds (Molothrus ater). We recorded robins' behavioral responses to simulated cowbird parasitism in nests where color variation was artificially enhanced or reduced. We also quantified egg color variation within and between unmanipulated robin clutches as perceived by robins themselves using spectrophotometric measures and avian visual modeling. In unmanipulated nests, egg color varied more between than within robin clutches. As predicted, however, manipulation of color variation did not affect rejection rates. Overall, our results best support the scenario wherein egg rejection is the outcome of selective pressure by a nonmimetic brood parasite, because robins are efficient rejecters of foreign eggs, irrespective of the color variation within their own clutch.

  8. Effect of commercial diets on egg quality characteristics | Ayanwale ...

    African Journals Online (AJOL)

    The effect of four commercial feeds in Niger State Nigeria on egg quality characteristics was studied. The feed designated diets 1, 2, 3 and 4 were fed to Rhode Island Red (RIR) hens and their eggs were collected as from 38 weeks of age for 4 weeks. A total of 384 eggs were analysed for both external and internal egg ...

  9. 7 CFR 1250.304 - Egg Board or Board.

    Science.gov (United States)

    2010-01-01

    ... AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE EGG RESEARCH AND PROMOTION Egg Research and Promotion Order Definitions § 1250.304 Egg Board or Board. Egg Board or Board or other designatory term adopted by such Board, with the approval of the Secretary, means the administrative body...

  10. Development of complete embryos in drastically deformed leafhopper eggs.

    Science.gov (United States)

    Vogel, Otto

    1982-03-01

    The egg of the leafhopperEuscelis plebejus was deformed by involuting both egg poles in longitudinal direction until the egg poles touched inside the egg. Even under those conditions a complete germ band with normal sequence of segments may be formed.

  11. Determining storage related egg quality changes via digital image ...

    African Journals Online (AJOL)

    Area and length measurements related to exterior and interior egg quality were determined by digital image analysis. In general, excluding the outer thin albumen area, all of the area measurements such as total egg content area and inner thick albumen area were larger in stored eggs than in fresh eggs (52.28 vs.

  12. Egg structural characteristics of Pygmy Cormorant (Microcarbo pygmaeus)

    OpenAIRE

    Faris A. Al-Obaidi; Shahrazad M. Al-Shadeedi

    2012-01-01

    This study was carried out to determine egg morphology characteristics and component of Pygmy Cormorant (Microcarbo pygmaeus) in Iraq. Freshly Pygmy Cormorant eggs without developed embryo were collected from Al- Tarmiya lakes north of Baghdad city to determined egg morphology characteristics including egg shape dimensions: weight, volume, specific gravity, shell, yolk, albumin weight as well as percentage of shell, yolk and albumin. Result...

  13. Effect of genotype on egg quality characteristics of guinea fowl ...

    African Journals Online (AJOL)

    The genotypes were Pearl x Pearl (PL x PL), Black x Black (BL x BL) and Pearl x Black (PL x BL). ... The external and shell quality parameters measured were egg weight (EWGT), egg length (ELGT), egg width (EWDT), egg shape index (ESPI), shell weight (SWGT), and shell thickness (STKN) while the internal traits were ...

  14. Quality Properties of Cakes Containing Gamma-Irradiated Egg White

    International Nuclear Information System (INIS)

    Lee, J.W.; Seo, J.H.; Ahn, H.J; Byun, M.W; Kim, Y.H.; Choi, J.M.; Yook, H.S.

    2003-01-01

    As a research on the practical approaches of gamma irradiation for the reduction of egg allergy, cakes including gamma-irradiated egg white were manufactured, and rheological characteristics and sensory qualities of the cakes were evaluated. Egg white was separated from whole egg and then gamma-irradiated with the absorbed dose of 10 or 20 kGy

  15. EFFECT OF EGGSHELL COLOR ON THE EGG CHARACTERISTICS AND HATCHABILITY OF GUINEA FOWL (NUMIDA MELEAGRIS EGGS

    Directory of Open Access Journals (Sweden)

    H Eleroğlu

    Full Text Available ABSTRACT The objective of this study was to determine the effects of eggshell color of guinea fowl (Numida meleagris eggs on eggshell quality and hatchery results. The highest mean grey value (MGV, integrated density (ID, lightness (L* and Hue angle (H* values were obtained in eggs with lighter eggshell color. The effects of color difference (DE* value levels on egg characteristics were evaluated. Eggshell color presented different (p0.05. In conclusion, under the conditions of the present study, eggshell color influenced eggshell thickness and weight loss, but not hatching parameters of guinea fowl eggs. Further studies on this subject should be carried out.

  16. Host intra-clutch variation, cuckoo egg matching and egg rejection by great reed warblers.

    Science.gov (United States)

    Cherry, Michael I; Bennett, Andrew T D; Moskát, Csaba

    2007-06-01

    Prevailing theory predicts that lower levels of intra-clutch variation in host eggs facilitate the detection of brood parasitism. We assessed egg matching using both human vision and UV-VIS spectrophotometry and then followed the nest fate of great reed warblers naturally parasitised by European cuckoos. Rejection was predicted by the following three variables: matching between cuckoo and host eggs on the main chromatic variable defined by principal components analysis of the egg spectra (which has a strong loading in the UV); the number of host eggs in the nest; and human estimates of intra-clutch variation. The first variable is not correlated to human estimates of matching, which do not predict rejection. In line with another recent study, rejection rates were predicted by higher levels of intra-clutch variation in the host eggs, suggesting that higher rather than lower levels of intra-clutch variation can facilitate the discrimination of cuckoo eggs by hosts. We suggest that the importance of intra-clutch variation is context dependent, with intra-clutch variation being important when there is good matching between the host and the cuckoo eggs. Our results also suggest that both spectrometric and human visual assessments of egg matching and intra-clutch variation are prudent: the former provide the best method of estimating reflectance variation, whereas the latter include some assessment of patterns of maculation.

  17. Effects of dietary taurine on egg production, egg quality and cholesterol levels in Japanese quail.

    Science.gov (United States)

    Wang, Fu-Rong; Dong, Xiao-Fang; Zhang, Xiao-Ming; Tong, Jian-Ming; Xie, Zhong-Guo; Zhang, Qi

    2010-12-01

    Taurine is a semi-essential amino acid and has many biological properties. The objective of this study was to determine the effect of dietary supplementation with taurine on egg production, egg quality, and cholesterol level in serum and egg yolk of quails. A total of 108 quails aged 6 weeks were randomly allocated to three dietary treatments. Each treatment consisted of four replicates of nine quails. The diets were supplemented with 0, 100, and 500 mg kg(-1) of taurine for 8 weeks. Dietary 500 mg kg(-1) taurine significantly affected egg production rate and feed conversion ratio, but had no significant effects on body weight gain, feed consumption, or egg weight. Dietary taurine had no significant effect on egg quality parameters studied. Serum triglyceride concentration was reduced significantly with supplementation of taurine at 100 and 500 mg kg(-1). Egg yolk cholesterol content was reduced significantly, and the contents of serum taurine and egg yolk taurine were increased significantly with taurine supplementation at 500 mg kg(-1). Results of the present study indicated that adding 500 mg kg(-1) taurine reduced yolk cholesterol concentration and increased yolk taurine content without adverse effects on performance and egg quality of laying quails. Copyright © 2010 Society of Chemical Industry.

  18. Water Retention: Relieve This Premenstrual Symptom

    Science.gov (United States)

    ... help relieve this premenstrual symptom. By Mayo Clinic Staff Is water retention a regular premenstrual symptom for you? Here's help to feel better. Premenstrual water retention is likely caused by ...

  19. The masquerade game: marine mimicry adaptation between egg-cowries and octocorals

    Directory of Open Access Journals (Sweden)

    Juan A. Sánchez

    2016-08-01

    Full Text Available Background. Background matching, as a camouflage strategy, is one of the most outstanding examples of adaptation, where little error or mismatch means high vulnerability to predation. It is assumed that the interplay of natural selection and adaptation are the main evolutionary forces shaping the great diversity of phenotypes observed in mimicry; however, there may be other significant processes that intervene in the development of mimicry such as phenotypic plasticity. Based on observations of background mismatching during reproduction events of egg-cowries, sea snails of the family Ovulidae that mimic the octocoral where they inhabit, we wondered if they match the host species diversity. Using observations in the field and molecular systematics, we set out to establish whether the different egg-cowrie color/shape polymorphisms correspond to distinct lineages restricted to specific octocoral species. Methods. Collection and observations of egg-cowries and their octocoral hosts were done using SCUBA diving between 2009 and 2012 at two localities in the Tropical Eastern Pacific (TEP, Malpelo Island and Cabo Corrientes (Colombia. Detailed host preference observations were done bi-annually at Malpelo Island. We analyzed the DNA sequence of the mitochondrial genes COIand 16S rDNA, extensively used in phylogenetic and DNA barcoding studies, to assess the evolutionary relationship among different egg-cowrie colorations and morphologies. Results. No genetic divergence among egg-cowries associated to different species of the same octocoral genus was observed based on the two mitochondrial genes analyzed. For instance, all egg-cowrie individuals from the two sampled localities observed on 8 different Pacifigorgia-Eugorgia species showed negligible mitochondrial divergence yet large morphologic divergence, which suggests that morphologies belonging to at least two sea snail species, Simnia avena(=S. aequalis and Simnialena rufa, can cross

  20. [Preservation of live eggs of Schistosoma japonicum].

    Science.gov (United States)

    Lan, Wei-ming; Xie, Shu-ying; Wang, Qin; Jiang, Wei-sheng; Hu, Ren-mei; Ge, Jun; Zeng, Xiao-jun

    2015-10-01

    To observe the preservation time and activity of miracidium hatching from schistosome eggs preserved in different solutions, so as to obtain the optimal preservation conditions and then provide quality control products for field application. The rectum stool of rabbits infected with Schistosoma japonicum was collected and the coarse fecal residue was removed with a series of sample sieves of 80, 100, 160 and 200 meshes respectively, and then the schistosome eggs were concentrated with the sample sieve of 260 meshes. The concentrated eggs were preserved in 0.9% sodium chloride solution, 1.2% sodium chloride solution, phosphate buffered saline solution (PBS, PH 7.2), 1.0% sucrose solution, and Mili-Q water, respectively, and then were conserved in a 4 °C refrigerator and 15 °C constant temperature incubator, respectively. The preserved eggs were hatched in different time (7-day interval) , the vitality and quantity of the miracidia were observed, and the hatching rates were calculated. Under the condition of 4 °C, the hatching rates of eggs dropped to 0 in 1.0% sucrose solution and 1.2% sodium chloride solution at the 49th and 126th day, respectively, and the hatching rates of eggs in the 0.9% sodium chloride solution and PBS solution dropped to 10% at the 112th day, and the activity of miracidium was weakened since 140th. In the Mili-Q water, the hatching rate dropped less than 10% at the 196th day and the activity of miracidia was weakened since the 280th day. Under the condition of 15 °C, the hatching rate of eggs in different solutions gradually dropped to 0 from the 49th day to 105th day. The eggs preserved in Mili-Q water at the temperature of 4 °C can be used as the positive reference for hatching tests within 196 days.

  1. GEOMETRICAL PARAMETERS OF EGGS IN BIRD SYSTEMATICS

    OpenAIRE

    Mityay I.S.; Matsyura A.V.

    2014-01-01

    Our ideas are based on the following assumptions. Egg as a standalone system is formed within another system, which is the body of the female. Both systems are implemented on the basis of a common genetic code. In this regard, for example, the dendrogram constructed by morphological criteria eggs should be approximately equal to those constructed by other molecular or morphological criteria adult birds. It should be noted that the dendrogram show only the degree of genetic similar...

  2. GEOMETRICAL PARAMETERS OF EGGS IN BIRD SYSTEMATICS

    OpenAIRE

    I. S. Mityay; A. V. Matsyura

    2014-01-01

    Our ideas are based on the following assumptions. Egg as a standalone system is formed within another system, which is the body of the female. Both systems are implemented on the basis of a common genetic code. In this regard, for example, the dendrogram constructed by morphological criteria eggs should be approximately equal to those constructed by other molecular or morphological criteria adult birds. It should be noted that the dendrogram show only the degree of genetic similarity of taxa,...

  3. essential oil as hatching egg disinfectant

    African Journals Online (AJOL)

    STORAGESEVER

    2010-04-26

    Apr 26, 2010 ... 1.36 b. 1.13 b. LSD (0.05). 0.12. 0.18. * = Counts expressed as logarithms (base 10) of number per egg; ** = Microbial count of oregano essential oil is the mean of 2 treatment doses. Table 3. Anti-microbial effect of oregano essential oil dose and exposure time on the microbial count of hatching egg surface ...

  4. Enumeration of Salmonellae in Table Eggs, Pasteurized Egg Products, and Egg-Containing Dishes by Using Quantitative Real-Time PCR

    DEFF Research Database (Denmark)

    Jakočiūnė, Džiuginta; Pasquali, Frédérique; da Silva, Cristiana Soares

    2014-01-01

    PCR) was employed for enumeration of salmonellae in different matrices: table eggs, pasteurized egg products, and egg-containing dishes. Salmonella enterica serovar Enteritidis and S. enterica serovar Tennessee were used to artificially contaminate these matrices. The results showed a linear regression between...... of salmonellae in two egg-containing dishes, long egg and tiramisu, at abused refrigeration temperatures, and results indicated the growth of bacteria over a 1-week period. In conclusion, enrichment qPCR was shown to be reliable for enumeration of salmonellae in different egg products....

  5. Update on oral immunotherapy for egg allergy.

    Science.gov (United States)

    Graham, François; Tardio, Natacha; Paradis, Louis; Des Roches, Anne; Bégin, Philippe

    2017-10-03

    Oral immunotherapy (OIT) is an emerging treatment of IgE-mediated egg allergy. In the past decade, a multitude of studies have assessed the potential for egg OIT to induce clinical desensitization. The following review will evaluate the efficacy and safety of this therapy as determined by randomized controlled, non-randomized controlled and uncontrolled trials. Recent studies using reduced allergenic egg products and anti-IgE assisted therapy to improve egg OIT safety will also be discussed. Recent advances in the mechanisms underlying food OIT suggest that certain immune parameters may be helpful in monitoring response to therapy, including egg OIT. Although, egg OIT is consistently shown to be effective with regards to clinical desensitization, fewer studies have looked at persistent tolerance or sustained unresponsiveness. Limited results of long-term follow-up trials suggest that this therapy may have disease-modifying effects. In general, the comparison of studies is complicated by major differences in study designs, OIT protocols and endpoints.

  6. Non-transferable signals on ant queen eggs

    DEFF Research Database (Denmark)

    D'Ettorre, Patrizia; Tofilski, Adam; Heinze, Jürgen

    2006-01-01

    become more acceptable once placed in the egg pile by odour transfer from touching queen-laid eggs. Here, we show that such "cue scrambling" does not occur. Worker-laid eggs that were sandwiched between three queen-laid eggs for 45 min were not more acceptable in a policing bioassay than control worker......How biological systems resolve internal conflicts is a major evolutionary question. Social insect workers cooperate but also pursue individual interests, such as laying male eggs. The rewards of this individual selfishness can be reduced by policing, such as by killing worker-laid eggs. However......, selfish individuals may evade policing. What factors prevent individuals from being able to evade policing? In the ant Pachycondyla inversa, workers kill (police) worker-laid eggs. Because the colony keeps eggs in piles and worker-laid and queen-laid eggs are chemically distinct, worker-laid eggs might...

  7. Proteins involved in motility and sperm-egg interaction evolve more rapidly in mouse spermatozoa.

    Directory of Open Access Journals (Sweden)

    Alberto Vicens

    Full Text Available Proteomic studies of spermatozoa have identified a large catalog of integral sperm proteins. Rapid evolution of these proteins may underlie adaptive changes of sperm traits involved in different events leading to fertilization, although the selective forces underlying such rapid evolution are not well understood. A variety of selective forces may differentially affect several steps ending in fertilization, thus resulting in a compartmentalized adaptation of sperm proteins. Here we analyzed the evolution of genes associated to various events in the sperm's life, from sperm formation to sperm-egg interaction. Evolutionary analyses were performed on gene sequences from 17 mouse strains whose genomes have been sequenced. Four of these are derived from wild Mus musculus, M. domesticus, M. castaneus and M. spretus. We found a higher proportion of genes exhibiting a signature of positive selection among those related to sperm motility and sperm-egg interaction. Furthermore, sperm proteins involved in sperm-egg interaction exhibited accelerated evolution in comparison to those involved in other events. Thus, we identified a large set of candidate proteins for future comparative analyses of genotype-phenotype associations in spermatozoa of species subjected to different sexual selection pressures. Adaptive evolution of proteins involved in motility could be driven by sperm competition, since this selective force is known to increase the proportion of motile sperm and their swimming velocity. On the other hand, sperm proteins involved in gamete interaction could be coevolving with their egg partners through episodes of sexual selection or sexual conflict resulting in species-specific sperm-egg interactions and barriers preventing interspecies fertilization.

  8. Linking local retention, self-recruitment, and persistence in marine metapopulations

    KAUST Repository

    Lett, Christophe

    2015-08-01

    Three indices of larval retention have been used in the literature to assess the tendency for self-maintenance of local marine populations: local retention (LR), self-recruitment (SR), and relative local retention (RLR). Only one of these, LR, defined as the ratio of locally produced settlement to local egg production, has a clear relationship to self-persistence of individual sites. However, SR, the ratio of locally produced settlement to settlement of all origins at a site, is generally easier to measure experimentally. We use theoretical, simulation, and empirical approaches to bridge the gap between these different indices, and demonstrate that there is a proportional relationship between SR and LR for metapopulations close to a stable state and with lifetime egg production (LEP) approximately uniform over space. Similarly, for systems where larval mortality rates are a relatively uniform function of release site, RLR (defined as the ratio of locally produced settlement to all settlement of local origin) and LR will also be proportional. Therefore, SR and RLR provide information on relative rates of LR for systems satisfying these conditions. Furthermore, the ratio between LR and SR can be used to evaluate global persistence of metapopulations, and therefore provides valuable information not necessarily available if only LR is considered.

  9. Supplementary Material for: Linking local retention, self-recruitment, and persistence in marine metapopulations

    KAUST Repository

    Lett, Christophe

    2016-01-01

    Three indices of larval retention have been used in the literature to assess the tendency for self-maintenance of local marine populations: local retention (LR), self-recruitment (SR), and relative local retention (RLR). Only one of these, LR, defined as the ratio of locally produced settlement to local egg production, has a clear relationship to self-persistence of individual sites. However, SR, the ratio of locally produced settlement to settlement of all origins at a site, is generally easier to measure experimentally. We use theoretical, simulation, and empirical approaches to bridge the gap between these different indices, and demonstrate that there is a proportional relationship between SR and LR for metapopulations close to a stable state and with lifetime egg production (LEP) approximately uniform over space. Similarly, for systems where larval mortality rates are a relatively uniform function of release site, RLR (defined as the ratio of locally produced settlement to all settlement of local origin) and LR will also be proportional. Therefore, SR and RLR provide information on relative rates of LR for systems satisfying these conditions. Furthermore, the ratio between LR and SR can be used to evaluate global persistence of metapopulations, and therefore provides valuable information not necessarily available if only LR is considered.

  10. Retention of lipiodol after parotid gland sialography

    NARCIS (Netherlands)

    Schortinghuis, J.; Pijpe, J.; Spijkervet, F. K. L.; Vissink, A.

    There is limited information about the retention of lipiodol in the parotid gland after parotid gland sialography. This study assesses the prevalence of lipiodol retention after parotid sialography and determines if retention of lipiodol is related to the sialography technique or the underlying

  11. Designing Online Courses to Promote Student Retention

    Science.gov (United States)

    Dietz-Uhler, Beth; Fisher, Amy; Han, Andrea

    2008-01-01

    Although the issue of student retention is a campus-wide one, it is of special interest in online distance learning courses, where retention rates are reported to be lower than in face-to-face classes. Among the explanations and theories of retention rates in online courses, one that struck us as most useful is a structural one, namely, course…

  12. 78 FR 57927 - Credit Risk Retention

    Science.gov (United States)

    2013-09-20

    ..., Collateral B. Proposed General Definitions III. General Risk Retention Requirement A. Minimum Risk Retention... Commercial Real Estate Loans 1. Ability To Repay 2. Loan-to-Value Requirement 3. Collateral Valuation 4. Risk... 43, 244, 373, et al. 17 CFR Part 246 24 CFR Part 267 Credit Risk Retention; Proposed Rule #0;#0...

  13. Effects of egg quality and method of incubation on the hatching success of channel X blue hybrid catfish eggs

    Science.gov (United States)

    The objective of this study was to evaluate the effects of egg quality of stripped eggs from channel catfish (Ictalurus punctatus) and method of incubation of fertilized hybrid catfish eggs on hatching success. Stripped eggs from 17 channel catfish females were evaluated in a 2 x 2 factorial...

  14. Prevalence of Pathogens Associated with Eggs and the Environment of Conventional Cage and Free Range Egg Production

    Science.gov (United States)

    Alternative egg production methods are becoming more popular with US consumers. As the drive to expand the retail shell egg market to accommodate consumer shifts proceeds, a need arises for additional information to ensure processing methodologies result in safe eggs from all egg sources. A study ...

  15. Differentially expressed genes in white egg 2 mutant of silkworm ...

    African Journals Online (AJOL)

    use

    2011-12-21

    Dec 21, 2011 ... several genotypes defined as white egg 1 (w-1), white egg 2 (w-2) and white egg 3 (w-3), caused by different deficient pigment metabolism in vivo (Lu, 1991). The mutant white egg 1 (w-1) is characterized by its white eyes and the production of white eggs as a result of its loss of the ninth and tenth exons of ...

  16. Imaging and Modeling of Colloid Retention Processes in Unsaturated Pore Experiments

    Science.gov (United States)

    Lazouskaya, V.; Shi, X.; Wang, L.; Jin, Y.

    2007-12-01

    Colloid transport in natural porous media (soil) is an important environmental concern due to effects and outcomes of such processes as colloid-facilitated transport of contaminants, transport of bio-colloids and nano- sized materials, and bacterial remediation. Retention of colloids in saturated porous media is mostly associated with retention of colloids at solid-water interface (SWI) and straining. In unsaturated porous media, colloids may be additionally retained at air-water interface (AWI) and contact line. While colloid transport in saturated porous media has achieved better understanding and theoretical prediction, colloid transport in unsaturated porous media poses more uncertainties mostly associated with colloid retention on AWI and contact line. Additionally, dynamic nature of natural soil processes indicates the importance of hydrodynamic conditions, which have to be accounted for in prediction of colloid transport. The objective of the current work is to provide insight into the relative importance of retention forces (colloid and hydrodynamic forces) and retention sites (AWI and contact line) of colloids at the interface- and pore-scale through combined experimental and numerical approaches. These include visualization of colloid behavior employing a micro-fluid channel and a confocal microscope, performing an estimate of colloid forces governing colloid interfacial interactions and retention, and numerical simulation of the flow field and colloid retention in the channel using the Lattice-Boltzmann method (LBM). Coupling of colloid and hydrodynamic forces in natural media presents a challenge, but it can be attempted in model systems such as presented in the current study. Despite the ideal nature of both colloids and porous media some important results on the role of colloid interfacial behavior in colloid transport can be inferred. Expanding these results to larger scales would be the next step needed in the future.

  17. Egg yolk plasma can replace egg yolk in stallion freezing extenders.

    Science.gov (United States)

    Pillet, E; Duchamp, G; Batellier, F; Beaumal, V; Anton, M; Desherces, S; Schmitt, E; Magistrini, M

    2011-01-01

    Hen egg yolk is normally used as a cryoprotective agent in semen freezing extenders, but its use has sanitary and practical disadvantages. Moreover the protection afforded by egg yolk has not yet been completely elucidated. The objective of this study was to compare the egg yolk plasma fraction to whole egg yolk in stallion freezing extender. Plasma contains mainly Low Density Lipoproteins (LDL), which are widely presumed to be the cryoprotective agent in egg yolk. Plasma can be produced on an industrial scale, sterilised by gamma-irradiation and incorporated in a ready-to-use extender (our ultimate objective). Plasma samples were subjected to different doses of gamma-irradiation (3, 5, 10 kGy) without dramatic chemical changes that may affect their cryoprotective properties. Stallion semen was frozen with whole egg yolk as a control and with sterilised egg yolk plasma. A fertility trial was conducted on a total of 70 mares' cycles. Fertility per cycle was 60% after insemination of semen frozen in our control extender containing egg yolk (EY), compared to 69% for the extender containing sterilised egg yolk plasma (EYP) (P > 0.05). Post-thaw motility and membrane integrity of spermatozoa were also analysed. Motility parameters were not significantly different between extenders except for the variable VAP (for EY versus EYP, VAP: 63 μm.s(-1) versus 59 μm.s(-1), a, b: P 0.05). Membrane integrity was better preserved in EY than in EYP but the difference between extenders was small (P < 0.05). Our results demonstrated that sterilised egg yolk plasma has the potential to replace egg yolk in stallion freezing extender. This experiment led to the development of a ready-to-use extender called INRA-Freeze(®) (IMV-Technologies, France). Copyright © 2011 Elsevier Inc. All rights reserved.

  18. Invasive Egg Predators and Food Availability Interactively Affect Maternal Investment in Egg Chemical Defense

    Directory of Open Access Journals (Sweden)

    Sarah C. Paul

    2018-01-01

    Full Text Available Invasive species commonly predate the offspring of native species and eggs are the life stage most vulnerable to this predation. In many species with no maternal care, females can alter the phenotype of eggs to protect them, for instance through chemical defense. In ladybirds egg alkaloids deter predators, including invasive predatory species of ladybirds, but conversely may attract cannibals who benefit from the consumption of eggs with higher alkaloid levels. Invasive predators tend to be more abundant where resources are also abundant, but in high resource environments the maternal fitness benefits of sibling cannibalism are low. Consequently this presents a conflict for female ladybirds between the different factors that influence egg alkaloid level, as protecting her eggs from predators might come with the cost of inadvertently encouraging within-clutch cannibalism under circumstances where it is not beneficial. We investigated how the ladybird Adalia bipunctata addresses this trade-off experimentally, by measuring the quantity of alkaloids in eggs laid by ladybirds in environments that differed in levels of resource availability and perceived predation risk from an invasive predator Harmonia axyridis. Females did lay eggs with higher egg alkaloid levels under poor resource conditions, but only when predator cues were absent. The resulting negative correlation between egg number and egg alkaloid level under poor resource conditions indicates a trade-off between these two attributes of maternal investment, mediated by female response to offspring predation risk. This implies that selection pressures on mothers to adaptively adjust the risk of siblicide may outweigh the need to protect offspring from interspecific predation. Our results demonstrate that maternal effects are an important aspect of species' responses to invasive predators, and highlight the value of studying maternal effects in the context of the multifaceted environments in

  19. Physicochemical and nutritional characteristics of preserved duck egg white.

    Science.gov (United States)

    Zhao, Yan; Tu, Yonggang; Xu, Mingsheng; Li, Jianke; Du, Huaying

    2014-12-01

    In this paper, the physicochemical and nutritional characteristics of preserved duck egg white were analyzed and compared with fresh egg and hard-cooked egg white (n = 3). The data obtained showed that the preserved egg white was rich in essential amino acids and minerals, such as Ca, Mg, Fe, Zn, Cu, K, and Na. After fresh duck eggs were processed into preserved eggs, contents of moisture, CP, amino acid, and water-soluble vitamin of egg white significantly decreased (P egg white significantly increased (P egg white had higher a* (redness/greenness) and b* values (yellowness/blueness; P egg white. The gel hardness of preserved egg white was approximately 50% of hard-cooked egg white; however, its springiness and cohesiveness were approximately 1.5 times of hard-cooked egg white. The results indicated that pickling with alkaline and other additives can significantly change physical properties and chemical composition of duck egg white, which make preserved egg white with characteristics of rich elements, brown color, and high springiness, but low vitamin. ©2014 Poultry Science Association Inc.

  20. Deuterium retention in liquid lithium

    International Nuclear Information System (INIS)

    Baldwin, M.J.; Doerner, R.P.; Luckhardt, S.C.; Conn, R.W.

    2002-01-01

    Measurements of deuterium retention in samples of lithium exposed in the liquid state to deuterium plasma are reported. Retention was measured as a function of plasma ion dose in the range 6x10 19 -4x10 22 D atoms and exposure temperature between 523 and 673 K using thermal desorption spectrometry. The results are consistent with the full uptake of all deuterium ions incident on the liquid metal surface and are found to be independent of the temperature of the liquid lithium over the range explored. Full uptake, consistent with very low recycling, continues until the sample is volumetrically converted to lithium deuteride. This occurs for exposure temperatures where the gas pressure during exposure was both below and slightly above the corresponding decomposition pressure for LiD in Li. (author)

  1. Retention of Root Canal Posts

    DEFF Research Database (Denmark)

    Sahafi, A; Benetti, Ana Raquel; Flury, S

    2015-01-01

    The aim of this study was to investigate the effect of the cement film thickness of a zinc phosphate or a resin cement on retention of untreated and pretreated root canal posts. Prefabricated zirconia posts (CosmoPost: 1.4 mm) and two types of luting cements (a zinc phosphate cement [DeTrey Zinc......] and a self-etch adhesive resin cement [Panavia F2.0]) were used. After removal of the crowns of 360 extracted premolars, canines, or incisors, the root canals were prepared with a parallel-sided drill system to three different final diameters. Half the posts did not receive any pretreatment. The other half...... received tribochemical silicate coating according to the manufacturer's instructions. Posts were then luted in the prepared root canals (n=30 per group). Following water storage at 37°C for seven days, retention of the posts was determined by the pull-out method. Irrespective of the luting cement...

  2. Recruitment and retention of minority students: diversity in nursing education.

    Science.gov (United States)

    Etowa, Josephine B; Foster, Suzanne; Vukic, Adele R; Wittstock, Lucille; Youden, Susan

    2005-01-01

    A culturally diverse nursing workforce is essential to meet the health needs of an increasingly diverse Canadian population. The recruitment and retention of nursing students representing diverse backgrounds are vital to the building of this diversified work force. Studies have shown that diversity within the student body benefits everyone. For example, students who study and work within a diverse environment are better able to understand and consider multiple perspectives and to appreciate the benefits inherent in diversity. This paper describes one school of nursing's project on the Recruitment and Retention of Black students into their Bachelor of Science Nursing (BScN) Program. The project goals are to increase diversity, foster student learning, and ultimately improve health care for the Black community. Presented in this paper are the project background, implementation process, challenges and outcomes. This may provide learned lessons and future directions for similar initiatives in other institutions.

  3. Comparison of Bioactive Compound Content in Egg Yolk Oil Extracted from Eggs Obtained from Different Laying Hen Housing Systems

    OpenAIRE

    Aleksandrs Kovalcuks

    2015-01-01

    Egg yolk oil is a natural source of bioactive compounds such as unsaturated fatty acids, oil soluble vitamins, pigments and others. Bioactive compound content in egg yolk oil depends from its content in eggs, from which oil was extracted. Many studies show that bioactive compound content in egg is correlated to the content of these compounds in hen feed, but there is also an opinion that hen housing systems also have influence on egg chemical content. The aim of this stud...

  4. Transfer of flubendazole and tylosin at cross contamination levels in the feed to egg matrices and distribution between egg yolk and egg white.

    Science.gov (United States)

    Vandenberge, V; Delezie, E; Delahaut, P; Pierret, G; De Backer, P; Daeseleire, E; Croubels, S

    2012-05-01

    Chemical residues may be present in eggs from laying hens' exposure to drugs or contaminants. These residues may pose risks to human health. In this study, laying hens received experimental feed containing flubendazole or tylosin at cross contamination levels of 2.5, 5, and 10% of the therapeutic dose. Eggs were collected daily and analysis of the whole egg, egg white, and egg yolk was performed using liquid chromatography tandem mass spectrometry. Highest concentrations of the parent molecule flubendazole, as well as the hydrolyzed and the reduced metabolite, were detected in egg yolk. Residue concentrations of the parent molecule were higher compared with those of the metabolites in all egg matrices. No tylosin residue concentrations were detected above the limit of quantification for all concentration groups and in all egg matrices. Neither molecule exceeded the set maximum residue limits.

  5. Effect of moderate spray drying conditions on functionality of dried egg white and whole egg.

    Science.gov (United States)

    Ayadi, M A; Khemakhem, M; Belgith, H; Attia, H

    2008-08-01

    Dried egg and egg-derived proteins have a range of applications in baking, dressings, and confectionery products. Egg powder was produced under high time-temperature scales (approximately 160 degrees C), which led to many changes in egg components, resulting in different functional properties of eggs after reconstitution. In this study, moderate operating conditions were selected to dry egg white and whole egg using a pilot-scale spray dryer. Functional properties changes were evaluated with an appropriate statistical technique. Major finding supports that spray drying of egg white at moderate conditions (air inlet temperature ranged from 110 to 125 degrees C) resulted in a product that enhanced considerably the water holding capacity of produced gels. Moreover, gel prepared with the dried samples was firmer than that of the fresh samples. Drying at a moderate scale allowed not only the increasing of the foaming capacity and the stability of foam but also an increase in their emulsifying capacity and stability of the emulsions.

  6. Performance and egg quality characteristics of egg-type chickens as ...

    African Journals Online (AJOL)

    Performance and egg quality characteristics of egg-type chickens as influenced by fluted pumpkin ( Telfaria occidentalis ) leaf extract. ... However results for Red blood cell count (RBC) and White blood cell count (WBC) and differential were increased with FPLE intake with birds administered 120ml/litre of FPLE having the ...

  7. Egg weight and egg shell thickness as affected by dietary calcium ...

    African Journals Online (AJOL)

    Graded levels of dietary inclusions of oyster shell and bone meal were used as calcium sources to determine their influence on egg weight and egg thickness for laying chicken in cages, under tropical conditions. Birds were allocated at random to 8% oyster shell and 2% bone meal in treatment 1; 7% and 3% in treatment II; ...

  8. a record of egg predation by the east african egg-eater dasypeltis ...

    African Journals Online (AJOL)

    only the snake which had an egg bulge in its throat. The observers then withdrew a short distance and the bulbul immediately returned. looked into the nest cup and settled to incubate. At 06h43 the bird raised and arched itself slightly. as though laying an egg, and then settled again. At 06h45 the bird stood up, and perching ...

  9. Artificial incubation of muscovy duck eggs : Why some eggs hatch and others do not

    NARCIS (Netherlands)

    Harun, MAS; Veeneklaas, RJ; Visser, GH; Van Kampen, M

    This study was designed to gain insight into the influence of spraying and cooling, during artificial incubation, on the embryo metabolic rate and hatching ability of Muscovy duck eggs. Three times a week 93 incubated eggs were sprayed and cooled for 0.5 h at room temperature. Daily embryo metabolic

  10. Retention behavior of double-crown attachments with zirconia primary and secondary crowns.

    Science.gov (United States)

    Schwindling, Franz Sebastian; Stober, Thomas; Rustemeier, Rainer; Schmitter, Marc; Rues, Stefan

    2016-05-01

    To investigate whether adequate retention of zirconia conical crown (CC) attachments can be achieved, and to investigate their long-term retention. Sixteen individual zirconia primary crowns were produced with convergence angles of 1° or 2° (eight of each). After determination of the convergence angles of the primary crowns, monolithic zirconia secondary crowns were manufactured. To evaluate the retention behavior of all-zirconia CC, the crowns were fitted with forces from F=12.5-100 N. Force magnitudes during the loosening process (L) were then measured. L/F ratios were recorded and the coefficient of friction (μ0) was calculated. Long-term retention was tested with up to 50,000 cycles of denture integration at a speed of 30 mms(-1) and a fitting force magnitude of 53 N. Even when primary crowns were manufactured with the utmost care, the real convergence angles were greater than the nominal angles of the standardized burs (1° and 2°) by 0.28° (SD 0.11°). Without mechanical aging, mean L/F was 0.632 (SD 0.038) for 1° samples and 0.526 (SD 0.022) for 2° samples, indicative of high retentive forces of up to 63.2% of the fitting forces. When all the test results were used, best-fitting curves gave μ0=0.117 for new samples and μ0=0.126 for samples after 50,000 integration cycles. When the correct milling and sintering parameters are chosen, the retention behavior of zirconia CCs is adequate and stable. This innovative type of attachment is appealing because of the beneficial properties of zirconia and the efficient CAD/CAM-based manufacture. Copyright © 2016 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

  11. Dinosaur origin of egg color: oviraptors laid blue-green eggs.

    Science.gov (United States)

    Wiemann, Jasmina; Yang, Tzu-Ruei; Sander, Philipp N; Schneider, Marion; Engeser, Marianne; Kath-Schorr, Stephanie; Müller, Christa E; Sander, P Martin

    2017-01-01

    Protoporphyrin (PP) and biliverdin (BV) give rise to the enormous diversity in avian egg coloration. Egg color serves several ecological purposes, including post-mating signaling and camouflage. Egg camouflage represents a major character of open-nesting birds which accomplish protection of their unhatched offspring against visually oriented predators by cryptic egg coloration. Cryptic coloration evolved to match the predominant shades of color found in the nesting environment. Such a selection pressure for the evolution of colored or cryptic eggs should be present in all open nesting birds and relatives. Many birds are open-nesting, but protect their eggs by continuous brooding, and thus exhibit no or minimal eggshell pigmentation. Their closest extant relatives, crocodiles, protect their eggs by burial and have unpigmented eggs. This phylogenetic pattern led to the assumption that colored eggs evolved within crown birds. The mosaic evolution of supposedly avian traits in non-avian theropod dinosaurs, however, such as the supposed evolution of partially open nesting behavior in oviraptorids, argues against this long-established theory. Using a double-checking liquid chromatography ESI-Q-TOF mass spectrometry routine, we traced the origin of colored eggs to their non-avian dinosaur ancestors by providing the first record of the avian eggshell pigments protoporphyrin and biliverdin in the eggshells of Late Cretaceous oviraptorid dinosaurs. The eggshell parataxon Macroolithus yaotunensis can be assigned to the oviraptor Heyuannia huangi based on exceptionally preserved, late developmental stage embryo remains. The analyzed eggshells are from three Late Cretaceous fluvial deposits ranging from eastern to southernmost China. Reevaluation of these taphonomic settings, and a consideration of patterns in the porosity of completely preserved eggs support an at least partially open nesting behavior for oviraptorosaurs. Such a nest arrangement corresponds with our

  12. Dinosaur origin of egg color: oviraptors laid blue-green eggs

    Directory of Open Access Journals (Sweden)

    Jasmina Wiemann

    2017-08-01

    Full Text Available Protoporphyrin (PP and biliverdin (BV give rise to the enormous diversity in avian egg coloration. Egg color serves several ecological purposes, including post-mating signaling and camouflage. Egg camouflage represents a major character of open-nesting birds which accomplish protection of their unhatched offspring against visually oriented predators by cryptic egg coloration. Cryptic coloration evolved to match the predominant shades of color found in the nesting environment. Such a selection pressure for the evolution of colored or cryptic eggs should be present in all open nesting birds and relatives. Many birds are open-nesting, but protect their eggs by continuous brooding, and thus exhibit no or minimal eggshell pigmentation. Their closest extant relatives, crocodiles, protect their eggs by burial and have unpigmented eggs. This phylogenetic pattern led to the assumption that colored eggs evolved within crown birds. The mosaic evolution of supposedly avian traits in non-avian theropod dinosaurs, however, such as the supposed evolution of partially open nesting behavior in oviraptorids, argues against this long-established theory. Using a double-checking liquid chromatography ESI-Q-TOF mass spectrometry routine, we traced the origin of colored eggs to their non-avian dinosaur ancestors by providing the first record of the avian eggshell pigments protoporphyrin and biliverdin in the eggshells of Late Cretaceous oviraptorid dinosaurs. The eggshell parataxon Macroolithus yaotunensis can be assigned to the oviraptor Heyuannia huangi based on exceptionally preserved, late developmental stage embryo remains. The analyzed eggshells are from three Late Cretaceous fluvial deposits ranging from eastern to southernmost China. Reevaluation of these taphonomic settings, and a consideration of patterns in the porosity of completely preserved eggs support an at least partially open nesting behavior for oviraptorosaurs. Such a nest arrangement corresponds

  13. The Effect of Addition Pineapple Peel Meal (Ananas comosus (L Merr in Diet on Total Egg and Egg Duck Quality

    Directory of Open Access Journals (Sweden)

    Muharlien Muharlien

    2012-02-01

    Full Text Available The aim of this research was to study the effect of addition pinneapple peel meal in diet on total egg and egg quality duck. Materials of the research were 60 mojosari ducks at seven months old. The treatment of pineapple peel meal addition in diet were treatment on level of 0, 2, 4, 6 and 8%. Variable were numbers of egg, egg shell thickness, fat and cholesterol egg yolk. The datas were analyzed using ANOVA from Randomized Block Design (RBD, if the result had significant effect, would be continued by Duncan’s Multiple Range Test (DMRT. The result showed that an addition pineapple peel meal in  duck diet had no effect (P>0,05 on numbers of egg and thick of egg shell, however, it had  highly significant effect (P<0,01 on fat  and  cholesterol  egg  yolk . The concluded showed that the addition of pineaple peel meal  in ducks diet can be decreasing fat and cholesterol egg yolk and can not decreasing numbers of egg and egg shell tick. Keywords: Mojosari ducks, total egg, egg shell thick, egg yolk fat, and egg yolk cholesterol

  14. Egg and Egg-Derived Foods: Effects on Human Health and Use as Functional Foods

    Directory of Open Access Journals (Sweden)

    Jose M. Miranda

    2015-01-01

    Full Text Available Eggs are sources of protein, fats and micronutrients that play an important role in basic nutrition. However, eggs are traditionally associated with adverse factors in human health, mainly due to their cholesterol content. Nowadays, however, it is known that the response of cholesterol in human serum levels to dietary cholesterol consumption depends on several factors, such as ethnicity, genetic makeup, hormonal factors and the nutritional status of the consumer. Additionally, in recent decades, there has been an increasing demand for functional foods, which is expected to continue to increase in the future, owing to their capacity to decrease the risks of some diseases and socio-demographic factors such as the increase in life expectancy. This work offers a brief overview of the advantages and disadvantages of egg consumption and the potential market of functional eggs, and it explores the possibilities of the development of functional eggs by technological methods.

  15. Egg and Egg-Derived Foods: Effects on Human Health and Use as Functional Foods

    Science.gov (United States)

    Miranda, Jose M.; Anton, Xaquin; Redondo-Valbuena, Celia; Roca-Saavedra, Paula; Rodriguez, Jose A.; Lamas, Alexandre; Franco, Carlos M.; Cepeda, Alberto

    2015-01-01

    Eggs are sources of protein, fats and micronutrients that play an important role in basic nutrition. However, eggs are traditionally associated with adverse factors in human health, mainly due to their cholesterol content. Nowadays, however, it is known that the response of cholesterol in human serum levels to dietary cholesterol consumption depends on several factors, such as ethnicity, genetic makeup, hormonal factors and the nutritional status of the consumer. Additionally, in recent decades, there has been an increasing demand for functional foods, which is expected to continue to increase in the future, owing to their capacity to decrease the risks of some diseases and socio-demographic factors such as the increase in life expectancy. This work offers a brief overview of the advantages and disadvantages of egg consumption and the potential market of functional eggs, and it explores the possibilities of the development of functional eggs by technological methods. PMID:25608941

  16. Chemical method for determination of carbon dioxide content in egg yolk and egg albumen.

    Science.gov (United States)

    Keener, K M; LaCrosse, J D; Babson, J K

    2001-07-01

    The safety, quality, and shelf life of shell eggs is a function of carbon dioxide content. A commercial process was recently developed for rapidly cooling shell eggs by using cryogenic CO2. The benefit of this new process over existing cooling processes is that the CO2 addition during cryogenic cooling provides additional safety and quality enhancements. In order for these benefits to be fully developed into a process that can be adopted by the egg industry, and thus realized by the consumer, the amount of CO2 absorbed by the egg during this process needs to be quantified. Because the albumen pH of rapidly cooled eggs was reduced to pH neutralization. A simple and accurate method for determining CO2 content in acidified egg albumen and yolk samples was developed. This method involves the liberation of CO2 from an acidified egg sample into a standardized, dilute sodium hydroxide solution inside a sealed jar. The egg sample and a small beaker containing the standardized sodium hydroxide solution are placed in a glass jar and sealed. Next, a concentrated acid phosphate solution is injected through a rubber septum in the cap of the jar onto the egg sample, while avoiding contact with the sodium hydroxide solution. The sample is then stored at 37 C for 24 h. During this storage period, the carbon dioxide is released from the egg sample and is absorbed into the sodium hydroxide solution. Afterwards, the dilute sodium hydroxide solution is removed and titrated to the phenolphthalein endpoint using a dilute, standardized hydrochloric acid solution. The amount of hydrochloric acid solution required for neutralization can be directly related to CO2 content in the sample.

  17. Scrambled eggs: Proteomic portraits and novel biomarkers of egg quality in zebrafish (Danio rerio.

    Directory of Open Access Journals (Sweden)

    Ozlem Yilmaz

    Full Text Available Egg quality is a complex biological trait and a major determinant of reproductive fitness in all animals. This study delivered the first proteomic portraits of egg quality in zebrafish, a leading biomedical model for early development. Egg batches of good and poor quality, evidenced by embryo survival for 24 h, were sampled immediately after spawning and used to create pooled or replicated sample sets whose protein extracts were subjected to different levels of fractionation before liquid chromatography and tandem mass spectrometry. Obtained spectra were searched against a zebrafish proteome database and detected proteins were annotated, categorized and quantified based on normalized spectral counts. Manually curated and automated enrichment analyses revealed poor quality eggs to be deficient of proteins involved in protein synthesis and energy and lipid metabolism, and of some vitellogenin products and lectins, and to have a surfeit of proteins involved in endo-lysosomal activities, autophagy, and apoptosis, and of some oncogene products, lectins and egg envelope proteins. Results of pathway and network analyses suggest that this aberrant proteomic profile results from failure of oocytes giving rise to poor quality eggs to properly transit through final maturation, and implicated Wnt signaling in the etiology of this defect. Quantitative comparisons of abundant proteins in good versus poor quality eggs revealed 17 candidate egg quality markers. Thus, the zebrafish egg proteome is clearly linked to embryo developmental potential, a phenomenon that begs further investigation to elucidate the root causes of poor egg quality, presently a serious and intractable problem in livestock and human reproductive medicine.

  18. GEOMETRICAL PARAMETERS OF EGGS IN BIRD SYSTEMATICS

    Directory of Open Access Journals (Sweden)

    Mityay I.S.

    2014-12-01

    Full Text Available Our ideas are based on the following assumptions. Egg as a standalone system is formed within another system, which is the body of the female. Both systems are implemented on the basis of a common genetic code. In this regard, for example, the dendrogram constructed by morphological criteria eggs should be approximately equal to those constructed by other molecular or morphological criteria adult birds. It should be noted that the dendrogram show only the degree of genetic similarity of taxa, therefore, the identity of materials depends on the number of analyzed criteria and their quality, ie, they should be the backbone. The greater the number of system-features will be included in the analysis and in one other case, the like are dendrogram. In other cases, we will have a fragmentary similarity, which is also very important when dealing with controversial issues. The main message of our research was to figure out the eligibility of usage the morphological characteristics of eggs as additional information in taxonomy and phylogeny of birds. Our studies show that the shape parameters of bird eggs show a stable attachment to certain types of birds and complex traits are species-specific. Dendrogram and diagrams built by the quantitative value of these signs, exhibit significant similarity with the dendrogram constructed by morphological, comparative anatomy, paleontology and molecular criteria for adult birds. This suggests the possibility of using morphological parameters eggs as additional information in dealing with taxonomy and phylogeny of birds.

  19. Modified pressure system for imaging egg cracks

    Science.gov (United States)

    Lawrence, Kurt C.; Yoon, Seung Chul; Jones, Deana R.; Heitschmidt, Gerald W.; Park, Bosoon; Windham, William R.

    2008-04-01

    One aspect of grading table eggs is shell checks or cracks. Currently, USDA voluntary regulations require that humans grade a representative sample of all eggs processed. However, as processing plants and packing facilities continue to increase their volume and throughput, human graders are having difficulty matching the pace of the machines. Additionally, some plants also have a problem with micro-cracks that the graders often miss because they are very small and hard to see immediately post-processing but grow and become readily apparent before they reach market. An imaging system was developed to help the grader detect these small micro-cracks. The imaging system utilized one image captured at atmospheric pressure and a second at a slight negative pressure to enhance the crack and make detection much easier. A simple image processing algorithm was then applied to the ratio of these two images and the resulting image, containing both cracked and/or intact eggs were color-coded to simplify identification. The imaging system was capable of imaging 15 eggs in about 3/4 second and the algorithm processing took about another 10 seconds. These times could easily be reduced with a dedicated, multi-threaded computer program. In analyzing 1000 eggs, the system was 99.6% accurate overall with only 0.3% false positives compared to 94.2% accurate overall for the human graders with 1.2% false positives. An international patent on the system was filed and further automation of the system is needed.

  20. CELLULAR RESPONSES TO EGG-OIL (CHARISMON©

    Directory of Open Access Journals (Sweden)

    Jürgen Bereiter-Hahn

    2014-01-01

    Full Text Available Egg-oil (Charismon© is known for its beneficial action in wound healing and other skin irritancies and its antibacterial activity. The physiological basis for these actions has been investigated using cells in culture: HaCaT-cells (immortalized human keratinocytes, human endothelial cells in culture (HUVEC, peripheral blood mononuclear lymphocytes (PBML and a full thickness human skin model (FTSM. Emphasis was on the influence of egg-oil on cell migration and IL-8 production in HaCaT cells, respiration, mitochondrial membrane potential, reactive oxygen (ROS production and proliferation in HUVEC and HaCaT cells, cytokine and interleukin production in PBML and UV-light induced damage of FTSM. IL-8 production by HaCaT cells is stimulated by egg-oil whilst in phythemagglutinin-activated PBMLs production of the interleukins IL-2, IL-6, IL-10 and IFN-γ and TFN-α is reduced. ROS-production after H2O2 stimulation first is enhanced but later on reduced. Respiration becomes activated due to partial uncoupling of the mitochondrial respiratory chain and proliferation of HaCaT and HUVEC is reduced. Recovery of human epidermis cells in FTSM after UV-irradiation is strongly supported by egg-oil. These results support the view that egg-oil acts through reduction of inflammatory processes and ROS production. Both these processes are equally important in cellular aging as in healing of chronic wounds.

  1. Characterization of egg white antibacterial properties during the first half of incubation: A comparative study between embryonated and unfertilized eggs.

    Science.gov (United States)

    Guyot, N; Réhault-Godbert, S; Slugocki, C; Harichaux, G; Labas, V; Helloin, E; Nys, Y

    2016-12-01

    Egg white is an important contributor to the protection of eggs against bacterial contaminations during the first half of incubation (day zero to 12), prior to the egg white transfer into the amniotic fluid to be orally absorbed by the embryo. This protective system relies on an arsenal of antimicrobial proteins and on intrinsic physicochemical properties that are generally unfavorable for bacterial multiplication and dissemination. Some changes in these parameters can be observed in egg white during egg storage and incubation. The aim of this work was to characterize changes in the antibacterial potential of egg white in embryonated eggs (FE) during the first half of incubation using unfertilized eggs (UF) as controls. Egg white samples were collected at day zero, 4, 8, and 12 and analyzed for pH, protein concentration, and protein profile. Antibacterial properties of egg white proteins were evaluated against Listeria monocytogenes, Streptococcus uberis, Staphylococcus aureus, Escherichia coli, and Salmonella Enteritidis. During incubation, differential variations of egg white pH and protein concentrations were observed between UF and FE. At equal protein concentrations, similar activities against L. monocytogenes and S. uberis were observed for FE and UF egg white proteins. A progressive decline in these activities, however, was observed over incubation time, regardless of the egg group (UF or FE). SDS-PAGE analysis of egg white proteins during incubation revealed discrete changes in the profile of major proteins, whereas the stability of some less abundant antimicrobial proteins seemed more affected. To conclude, the antibacterial activity of egg white proteins progressively decreased during the first half of egg incubation, possibly resulting from the alteration of specific antimicrobial proteins. This apparent decline may be partly counterbalanced in embryonated eggs by the increase in egg white protein concentration. The antibacterial potential of egg white

  2. Parametric soil water retention models: a critical evaluation of expressions for the full moisture range

    Science.gov (United States)

    Madi, Raneem; Huibert de Rooij, Gerrit; Mielenz, Henrike; Mai, Juliane

    2018-02-01

    Few parametric expressions for the soil water retention curve are suitable for dry conditions. Furthermore, expressions for the soil hydraulic conductivity curves associated with parametric retention functions can behave unrealistically near saturation. We developed a general criterion for water retention parameterizations that ensures physically plausible conductivity curves. Only 3 of the 18 tested parameterizations met this criterion without restrictions on the parameters of a popular conductivity curve parameterization. A fourth required one parameter to be fixed. We estimated parameters by shuffled complex evolution (SCE) with the objective function tailored to various observation methods used to obtain retention curve data. We fitted the four parameterizations with physically plausible conductivities as well as the most widely used parameterization. The performance of the resulting 12 combinations of retention and conductivity curves was assessed in a numerical study with 751 days of semiarid atmospheric forcing applied to unvegetated, uniform, 1 m freely draining columns for four textures. Choosing different parameterizations had a minor effect on evaporation, but cumulative bottom fluxes varied by up to an order of magnitude between them. This highlights the need for a careful selection of the soil hydraulic parameterization that ideally does not only rely on goodness of fit to static soil water retention data but also on hydraulic conductivity measurements. Parameter fits for 21 soils showed that extrapolations into the dry range of the retention curve often became physically more realistic when the parameterization had a logarithmic dry branch, particularly in fine-textured soils where high residual water contents would otherwise be fitted.

  3. Retentive characteristics of Ankylos SynCone conical crown system over long-term use in vitro.

    Science.gov (United States)

    Zhang, Ren-Guo; Hannak, Wolfgang B; Roggensack, Markus; Freesmeyer, Wolfgang B

    2008-06-01

    18 Ankylos SynCone conical crowns with 4-degree angle and 18 SynCone conical crowns with 6-degree angle were tested in vitro for a total of 5,000 insertion-separation cycles to investigate their retentive characteristics. Under 20 N insertion force, the retentive force of Ankylos SynCone conical crown system was between 5 and 10 N. The rententive force kept almost constant during the entire testing cycles. It was thus shown that the SynCone conical crown system could potentially provide adequate and constant retentive force to retain implant-supported overdentures. It may be considered to retain implant-supported mandibular overdentures as an alternative to bar attachments.

  4. Biochemical composition of marine monogenean parasite eggs.

    Science.gov (United States)

    Brazenor, Alexander K; Francis, David S; Hutson, Kate S; Carton, Alexander G

    2017-12-01

    This study on the eggs of the tropical monogenean Neobenedenia girellae presents the first detailed quantitative biochemical information of a marine parasite species' eggs. Moisture and protein composed the majority of the contents of freshly laid eggs (79.12±0.82 and 11.51±0.49% respectively) followed by lipid (2.50±0.15%). Lipids were composed of approximately equal amounts of saturated, monounsaturated, and polyunsaturated fatty acids and the predominant lipid class was triacylglycerol (33.82±1.20%). This study represents a fundamental step towards a better understanding of the early life biology of this important species of parasite. Copyright © 2017. Published by Elsevier B.V.

  5. Regulating the market for human eggs.

    Science.gov (United States)

    Resnik, D B

    2001-02-01

    This essay provides a rationale for a regulated market for human oocytes. Although the commodification of human oocytes raises important moral concerns, these concerns do not justify laws banning commerce in human eggs. Given the burgeoning ART industry and the growing oocyte market, the most prudent course of action is to develop regulations for the human oocyte market that are designed to protect and promote important social values, such as health, safety, liberty, and respect for human life. Other responses, such as banning the sale of eggs altogether or allowing donors to be compensated only for their services, would either create a black market or would lead to corruption and abuse. Society still needs to debate specific rules and policies that should govern the human egg market, but further discussion of that important task is best left to legislative bodies and other commentators.

  6. Gene expression during Drosophila melanogaster egg development before and after reproductive diapause

    Directory of Open Access Journals (Sweden)

    Baker Dean A

    2009-05-01

    Full Text Available Abstract Background Despite the importance of egg development to the female life cycle in Drosophila, global patterns of gene expression have not been examined in detail, primarily due to the difficulty in isolating synchronised developmental stages in sufficient quantities for gene expression profiling. Entry into vitellogenesis is a key stage of oogenesis and by forcing females into reproductive diapause we are able to arrest oogenesis at the pre-vitellogenic stages. Releasing females from diapause allows collection of relatively synchronous developing egg populations and an investigation of some of the transcriptional dynamics apparent before and after reproductive diapause. Results Focusing on gender-biased transcription, we identified mechanisms of egg development suppressed during reproductive dormancy as well as other molecular changes unique to the diapausing female. A microarray based analysis generated a set of 3565 transcripts with at least 2-fold greater expression in females as compared to control males, 1392 such changes were biased during reproductive dormancy. In addition, we also detect 1922 up-regulated transcriptional changes after entry into vitellogenesis, which were classified into discrete blocks of co-expression. We discuss some of the regulatory aspects apparent after re-initiation of egg development, exploring the underlying functions, maternal contribution and evolutionary conservation of co-expression patterns involved in egg production. Conclusion Although much of the work we present is descriptive, fundamental aspects of egg development and gender-biased transcription can be derived from our time-series experiment. We believe that our dataset will facilitate further exploration of the developmental and evolutionary characteristics of oogenesis as well as the nature of reproductive arrest in Drosophila.

  7. GEOMETRICAL PARAMETERS OF EGGS IN BIRD SYSTEMATICS

    Directory of Open Access Journals (Sweden)

    I. S. Mityay

    2014-12-01

    Full Text Available Our ideas are based on the following assumptions. Egg as a standalone system is formed within another system, which is the body of the female. Both systems are implemented on the basis of a common genetic code. In this regard, for example, the dendrogram constructed by morphological criteria eggs should be approximately equal to those constructed by other molecular or morphological criteria adult birds. It should be noted that the dendrogram show only the degree of genetic similarity of taxa, therefore, the identity of materials depends on the number of analyzed criteria and their quality, ie, they should be the backbone. The greater the number of system-features will be included in the analysis and in one other case, the like are dendrogram. In other cases, we will have a fragmentary similarity, which is also very important when dealing with controversial issues. The main message of our research was to figure out the eligibility of usage the morphological characteristics of eggs as additional information in taxonomy and phylogeny of birds. Our studies show that the shape parameters of bird eggs show a stable attachment to certain types of birds and complex traits are species-specific. Dendrogram and diagrams built by the quantitative value of these signs, exhibit significant similarity with the dendrogram constructed by morphological, comparative anatomy, paleontology and molecular criteria for adult birds. This suggests the possibility of using morphological parameters eggs as additional information in dealing with taxonomy and phylogeny of birds. Keywords: oology, geometrical parameters of eggs, bird systematics

  8. Egg consumption and heart health: A review.

    Science.gov (United States)

    Clayton, Zachary S; Fusco, Elizabeth; Kern, Mark

    2017-05-01

    Cardiovascular disease is the leading cause of death in the United States. Until recently, reducing dietary cholesterol has been a part of the American Heart Association (AHA) and American College of Cardiology (ACC) guidelines on lifestyle management, despite inconclusive evidence to support the recommendation. Considering eggs are a rich source of dietary cholesterol (typically containing 141-234 mg per egg), individuals with increased risk for CVD are advised not to consume eggs. Furthermore, based on the 2012 AHA/ACC guidelines, individuals with lower risk for CVD have previously been advised to avoid consuming eggs due to the high content of dietary cholesterol. Rather than strictly limiting cholesterol intake, the AHA and ACC guidelines now recommend dietary patterns that emphasize fruits, vegetables, whole grains, low-fat dairy products, poultry, fish, and nuts as an approach to favorably alter blood lipid levels. Of note, the 2015-2020 Dietary Guidelines for Americans have removed the recommendation of limiting cholesterol intake to no more than 300 mg per day; however, the guidelines advise that individuals should eat as little dietary cholesterol as possible while consuming a healthy eating pattern. The purpose of this review is to summarize the documented health risks of egg consumption in individuals with low and high risk for CVD and determine whether current recommendations are warranted based on the available literature. We also aim to provide guidance for future studies that will help further elucidate the health modulating effect of eggs. Copyright © 2016 Elsevier Inc. All rights reserved.

  9. Planktonic stages of small pelagic fishes (Sardinella aurita and Engraulis encrasicolus) in the central Mediterranean Sea: The key role of physical forcings and implications for fisheries management

    Science.gov (United States)

    Torri, Marco; Corrado, Raffaele; Falcini, Federico; Cuttitta, Angela; Palatella, Luigi; Lacorata, Guglielmo; Patti, Bernardo; Arculeo, Marco; Mifsud, Roberta; Mazzola, Salvatore; Santoleri, Rosalia

    2018-03-01

    Multidisciplinary studies are recently aiming to define diagnostic tools for fishery sustainability by coupling ichthyoplanktonic datasets, physical and bio-geochemical oceanographic measurements, and ocean modelling. The main goal of these efforts is to understand those processes that control the dispersion and fate of fish larvae and eggs, and thus tuning the inter-annual variability of the biomass of small pelagic fish species. In this paper we analyse the distribution of eggs and larvae as well as the biological features of the two species of pelagic fish, Engraulis encrasicolus and Sardinella aurita in the north-eastern sector of the Sicily Channel (Mediterranean Sea) from ichthyoplanktonic data collected during the 2010 and 2011 summer cruises. We use Lagrangian simulations and satellite data (i.e., sea surface temperature, wind, and chlorophyll-a concentration) to recognize the main oceanographic patterns that mark eggs and larvae transport processes. We provide a mechanistic explanation of a cross-shore transport process by using a potential vorticity (PV) model that takes into account the role of wind stress in generating cold filaments. Our results show that the strong offshore transport towards Malta occurred in 2010 was likely due to a persistent Mistral wind forcing that generated high-PV cold filaments. This phenomenon was not found in the 2011 analysis, which indeed showed an along-shore transport towards the retention area of Capo Passero. Since, for the first time, we describe the spatial distribution of the early life stage of Sardinella aurita in the northern part of the Sicily Channel and we clarify the link between the ocean dynamics and the fate of small pelagic fish larvae, this work provides a useful, diagnostic tool for the sustainable management of fishery resources.

  10. Geographical variation in egg mass and egg content in a passerine bird.

    Directory of Open Access Journals (Sweden)

    Suvi Ruuskanen

    Full Text Available Reproductive, phenotypic and life-history traits in many animal and plant taxa show geographic variation, indicating spatial variation in selection regimes. Maternal deposition to avian eggs, such as hormones, antibodies and antioxidants, critically affect development of the offspring, with long-lasting effects on the phenotype and fitness. Little is however known about large-scale geographical patterns of variation in maternal deposition to eggs. We studied geographical variation in egg components of a passerine bird, the pied flycatcher (Ficedula hypoleuca, by collecting samples from 16 populations and measuring egg and yolk mass, albumen lysozyme activity, yolk immunoglobulins, yolk androgens and yolk total carotenoids. We found significant variation among populations in most egg components, but ca. 90% of the variation was among individuals within populations. Population however explained 40% of the variation in carotenoid levels. In contrast to our hypothesis, we found geographical trends only in carotenoids, but not in any of the other egg components. Our results thus suggest high within-population variation and leave little scope for local adaptation and genetic differentiation in deposition of different egg components. The role of these maternally-derived resources in evolutionary change should be further investigated.

  11. Relationship between specific surface area and the dry end of the water retention curve for soils with varying clay and organic carbon contents

    DEFF Research Database (Denmark)

    Resurreccion, Augustus C.; Møldrup, Per; Tuller, Markus

    2011-01-01

    Accurate description of the soil water retention curve (SWRC) at low water contents is important for simulating water dynamics and biochemical vadose zone processes in arid environments. Soil water retention data corresponding to matric potentials of less than −10 MPa, where adsorptive forces...

  12. Pulse radiolysis study of egg white

    International Nuclear Information System (INIS)

    Micic, O.I.; Josimovic, L.; Markovic, V.

    1978-01-01

    Radiolytic processes in egg white in intervals of 0.1μs to several seconds have been studied by the pulse radiolysis technique. The formation and decay of short-lived intermediates and their absorption spectra were observed under varied experimental conditions. The results show that intermediates are produced predominantly in reactions of radicals formed in water radiolysis with egg white proteins. The intermediates decay mainly in the first-order intermolecular processes, though the mechanism of transformations is very complex. (author)

  13. Effect of egg washing on the cuticle quality of brown and white table eggs.

    Science.gov (United States)

    Leleu, S; Messens, W; De Reu, K; De Preter, S; Herman, L; Heyndrickx, M; De Baerdemaeker, J; Michiels, C W; Bain, M

    2011-10-01

    Egg washing is currently not permitted within the European Union, with few exceptions. This is mainly because there are concerns that cuticle damage could occur during or after the washing process, as a result of a suboptimal operation. In this study, the cuticle coverage levels of 400 washed or unwashed eggs, derived from either a brown or a white egg-laying flock at the end of lay, were compared. The eggs from older hens inherently have poorer cuticle coverage and as a result arguably constitute a greater risk to consumer safety if they are then washed. Thus, the effects of the washing procedure used in this study on cuticle quality were tested under the worst-case scenario. A standard Swedish egg washing process was used. The cuticle coverage of the eggs was assessed by a colorimeter by quantifying the color difference before and after staining with Tartrazine and Green S. The cuticle of an additional 30 eggs from each of the four groups was then visually assessed by scanning electron microscopy. The staining characteristics of the cuticle varied greatly within each group of eggs and showed that the washing process did not lead to cuticle damage. Scanning electron microscopy confirmed that there was no irreversible damage to the cuticle of the washed eggs and that it was not possible to correctly assign the treatment (washed or not) based on a visual assessment. In conclusion, no evidence could be found to suggest that the washing procedure used in this investigation irreversibly changed the quality of the cuticle.

  14. Selective Bioparticle Retention and Characterization in a Chip-Integrated Confocal Ultrasonic Cavity

    DEFF Research Database (Denmark)

    Svennebring, J.; Manneberg, O.; Skafte-Pedersen, Peder

    2009-01-01

    We demonstrate selective retention and positioning of cells or other bioparticles by ultrasonic manipulation in a microfluidic expansion chamber during microfluidic perfusion. The chamber is designed as a confocal ultrasonic resonator for maximum confinement of the ultrasonic force field at the c...

  15. BREAK-EVEN ANALYSIS (BEA IN EGG PRODUCTION

    Directory of Open Access Journals (Sweden)

    Jadranka Deže

    2010-12-01

    Full Text Available A conducted research analyzes two systems of egg production, the conventional, commercial egg production and the egg production with a higher nutritive value - PUFA n-3 enriched eggs. Financial result of eggs production with PUFA n-3 is significantly higher than that of the conventional production - profitability of the conventional production was 19.29% and the one with PUFA n-3 enriched eggs 36.10%. It is, therefore, important to evaluate the efficiency of the use of capital based on the profitability of capital that is in the conventional egg production 23.9%, and in the production of PUFA n-3 enriched eggs 56.1%. According to the results of investigation, it is necessary to produce 258 eggs in the conventional egg production, whereas in the production of enrichments eggs with PUFA n-3 breakeven point (BEP is lower and amounts 204 eggs per laying hen per year. A higher cover rate with a difference of 10% (42.99±53.07 confirms that the production of enrichments eggs with PUFA n-3 is economically more efficient.

  16. A morphometric method of sexing white layer eggs

    Directory of Open Access Journals (Sweden)

    B Yilmaz-Dikmen

    2013-09-01

    Full Text Available The present study was carried out to determine the sex of the fertilized white layer eggs with using morphological measurements. A total of 300 Super Nick White Layer (54 wks of age eggs were incubated and sexed in the end of incubation period. Before incubation egg length, width and weight were measured. The egg volume and shape index were estimated with using these measurements for each egg. The effect of egg weight and replicate number was not significant on the sex of the hatching chick (p > 0.05. The effects of egg shape index (p = 0.001, egg length (p = 0.0018, egg width (p < 0.01 and volume (p = 0.004 of the egg had significant effect on the sex of hatching chick. According to the results of the current study, morphological measurements of the pre-incubated egg might be an indicator of sex of the hatching chick. The shape index and egg volume were more informative for the likelihood of the sex of hatching chick. According to the positive results of the current study, it is possible to incubate more female chicks with using the morphological measurements of egg. This may increase the incubation capacity and decrease the number male chicks that are killed at layer hatcheries.

  17. Egg size matching by an intraspecific brood parasite

    Science.gov (United States)

    Lemons, Patrick R.; Sedinger, James S.

    2011-01-01

    Avian brood parasitism provides an ideal system with which to understand animal recognition and its affect on fitness. This phenomenon of laying eggs in the nests of other individuals has classically been framed from the perspective of interspecific brood parasitism and host recognition of parasitic eggs. Few examples exist of strategies adopted by intraspecific brood parasites to maximize success of parasitic eggs. Intraspecific brood parasitism within precocial birds can be a risky strategy in that hatch synchrony is essential to reproductive success. Given that egg size is positively correlated with incubation time, parasitic birds would benefit by recognizing and selecting hosts with a similar egg size. Intraspecific brood parasitism is an alternative reproductive strategy in black brant (Branta bernicla nigricans), a colonial nesting goose with precocial young. Based on a randomization test, parasitic eggs in this study differed less in size from eggs in their host's nests than did random eggs placed in random nests. Parasitic eggs were remarkably similar in size to hosts’ eggs, differing by parasitic brant match the egg size of hosts in our study supports our hypothesis that brant match egg size of hosts, thereby maximizing hatching success of their parasitic eggs.

  18. Non-transferable signals on ant queen eggs

    Science.gov (United States)

    D'Ettorre, Patrizia; Tofilski, Adam; Heinze, Jürgen; Ratnieks, Francis L. W.

    2006-03-01

    How biological systems resolve internal conflicts is a major evolutionary question. Social insect workers cooperate but also pursue individual interests, such as laying male eggs. The rewards of this individual selfishness can be reduced by policing, such as by killing worker-laid eggs. However, selfish individuals may evade policing. What factors prevent individuals from being able to evade policing? In the ant Pachycondyla inversa, workers kill (police) worker-laid eggs. Because the colony keeps eggs in piles and worker-laid and queen-laid eggs are chemically distinct, worker-laid eggs might become more acceptable once placed in the egg pile by odour transfer from touching queen-laid eggs. Here, we show that such “cue scrambling” does not occur. Worker-laid eggs that were sandwiched between three queen-laid eggs for 45 min were not more acceptable in a policing bioassay than control worker-laid eggs. Chemical analyses also showed that the surface hydrocarbon profile of these eggs was unchanged. Policing, therefore, is stable against this potential cheating mechanism probably because queen-laid eggs are made chemically distinct using chemicals, that are not easily transferred by physical contact.

  19. Buprenorphine retention in primary care.

    Science.gov (United States)

    Stein, Michael D; Cioe, Patricia; Friedmann, Peter D

    2005-11-01

    This study assesses the rate and predictors of treatment retention for primary care patients with opioid dependence-prescribed buprenorphine, a long-acting partial opioid agonist. Observational cohort study of patients prescribed buprenorphine/naloxone and followed for 6 months in the period after the adoption of buprenophine/naloxone by a primary care practice in Rhode Island. Practice policy precluded patient discharges due to continuing drug use. Patients (n=41) had a mean duration of opioid use of 15.7 years and most had a history of heroin use (63.4%). Thirty-nine percent of patients transferred from methadone maintenance. At 24 weeks, 59% remained in treatment. Nearly half of dropouts occurred in the first 30 days. Participants with opiate-positive toxicologies at week 1 were more likely to drop out of the program (Pbuprenorphine maintenance practice reflect those reported in clinical trials. Abstinence during the first week of treatment and receipt of counseling were critical to patient retention.

  20. Nosewitness Identification: Effects of Lineup Size and Retention Interval.

    Science.gov (United States)

    Alho, Laura; Soares, Sandra C; Costa, Liliana P; Pinto, Elisa; Ferreira, Jacqueline H T; Sorjonen, Kimmo; Silva, Carlos F; Olsson, Mats J

    2016-01-01

    Although canine identification of body odor (BO) has been widely used as forensic evidence, the concept of nosewitness identification by human observers was only recently put to the test. The results indicated that BOs associated with male characters in authentic crime videos could later be identified in BO lineup tests well above chance. To further evaluate nosewitness memory, we assessed the effects of lineup size (Experiment 1) and retention interval (Experiment 2), using a forced-choice memory test. The results showed that nosewitness identification works for all lineup sizes (3, 5, and 8 BOs), but that larger lineups compromise identification performance in similarity to observations from eye- and earwitness studies. Also in line with previous eye- and earwitness studies, but in disagreement with some studies on odor memory, Experiment 2 showed significant forgetting between shorter retention intervals (15 min) and longer retention intervals (1-week) using lineups of five BOs. Altogether this study shows that identification of BO in a forensic setting is possible and has limits and characteristics in line with witness identification through other sensory modalities.

  1. Moorhens have an internal representation of their own eggs

    Science.gov (United States)

    Petrie, Marion; Pinxten, Rianne; Eens, Marcel

    2009-03-01

    How do birds recognize their own eggs? Do they have a stored template for their own egg characteristics, or do they use another mechanism? Intraspecific brood parasitism is considered to be an additional reproductive tactic where females can increase their own reproductive success. Because of the costs involved in rearing young that are not their own, it will pay females to detect and reject the eggs of a parasite, although it is not known how they do this. Here, we show experimentally that moorhens will cease laying in a nest when their first egg is replaced with another hen’s egg but not when it is replaced with their own egg taken from an earlier clutch. This provides good evidence that birds have an internal representation of their own eggs and use this in decisions about whether to reject foreign eggs.

  2. Control and monitoring of Salmonella in egg-laying chickens

    Science.gov (United States)

    Contaminated eggs have been internationally significant sources for the transmission of Salmonella infection to humans for several decades. Both the public and private sectors have invested substantial resources in comprehensive risk reduction and monitoring programs for Salmonella in commercial egg...

  3. Tips to Reduce Your Risk of Salmonella from Eggs

    Science.gov (United States)

    ... this? Submit What's this? Submit Button Past Emails Salmonella and Eggs Language: English (US) Español (Spanish) Recommend on Facebook Tweet Share Compartir ALERT: Salmonella Outbreak Linked to shell eggs CDC, FDA, and ...

  4. Effect of Dietary Crude Protein and Methionine on Egg Production and Egg Quality of Laying Hens During Phase II

    Directory of Open Access Journals (Sweden)

    H Mohammadi Emarat

    2012-02-01

    Full Text Available An experiment was conducted to evaluate the effect of dietary crude protein and methionine levels on quality and quantity of egg production. Fifteen diets formulated with 3 levels of protein (13, 14 and 15% and 5 levels of methionine (0.25, 0.28, 0.31, 0.34 and 0.37% and fed to 420 birds in a 3×5 factorial arrangement. Each diet was randomly fed to 4 replicates of 7 birds each and fed for 3 periods of 4 weeks (50-62wks of age each. Egg number and mortality was recorded daily, whereas feed consumption determined at the end of each period. The increased in dietary protein significantly increased egg production from 54 to 59.4 %. Egg weight, egg mass and feed intake increased by 1.7 g, 3.4 g, and 2.8 g, respectively during the whole experimental period. As the dietary protein increased, feed conversion, egg component (as a percent of whale egg and egg albumin percent were improved. However, the egg breaking, specific gravity and eggshell were significantly decreased with increased dietary protein. The egg yolk percent was not influenced by dietary protein levels. The increased in dietary methionine from 0.25% to 0.37% caused the overall egg production, egg weight, egg mass, feed intake and egg component to improve by about 8.2%, 4g, 6.6g, 8.7g, and 6.0g, respectively. Feed conversion, specific gravity, egg breakage, egg shell, and egg yolk and albumin percent were not influenced by dietary methionine levels.

  5. Effects of Hen Age and Egg Weight Class on the Hatchability of Free Range Indigenous Chicken Eggs

    Directory of Open Access Journals (Sweden)

    AM Abudabos

    Full Text Available ABSTRACT In total, 806 eggs of free-range Hassawi indigenous chickens were collected from local farm in Saudi Arabia. Eggs were weekly collected for 11 weeks. Initial egg weight (IEW was recorded, and eggs were graded into four classes (A: 35-40 g, B: 40-45 g, C: 45-50 g, and D: 50-55 g. Eggs were stored for seven days at 75-80% relative humidity and 14-16 C, after which egg weight losses (WL0 were calculated. During incubation, eggs were weighed on days 7 (W7 and 14 (W14, and egg weight losses on days 7 (WL7 and 14 (WL14, and total loss (WL0-14 were calculated. Hatchling weight (CW was measured. The proportion of CW relative to egg weight loss (WL on days0, 7 and 14 days of incubation (CW:WL0; CW:WL7 and CW:WL14, respectively, and break out analyses, fertility (F,total hatchability (HC and hatchability of fertile eggs (HF were also calculated. IEW decreased (p<0.05 with hen age. Stored egg weight (SEW were decreased as hen age increased (p<0.05. WL7, WL14 and WL0-14 showed significant differences (p<0.001 and increased up to first six-week of egg collection time. Hen age affected CW:WL before incubation, and on days 7 and 14 of incubation. Fertility (F was affected (p<0.05 in unpredicted way of increasing and decreasing by hen age. Egg weight class affected SEW, W7and W14 (p<0.001. Class D eggs were the highest weight. Class C eggs had highest HC. In summary, hatching eggs of Hassawi hens were affected by hen age and egg weight in randomly increase and decrease .

  6. 21 CFR 160.105 - Dried eggs.

    Science.gov (United States)

    2010-04-01

    ...) Yeast procedure. The pH of the liquid eggs is adjusted to the range of 6.0 to 7.0, if necessary, by the addition of dilute, chemically pure hydrochloric acid, and controlled fermentation is maintained by adding food-grade baker's yeast (Saccharomyces cerevisiae). The quantity of yeast used and the time of...

  7. DETERMINANTS OF ADOPTION OF WHITE EGG SHELLED ...

    African Journals Online (AJOL)

    This Paper centres on the factors influencing the adoption of white egg shelled layers among poultry farmers in Ogun State, Nigeria. It relied on the primary data collected from 96 randomly selected poultry farmers from five local government areas of Ogun state, Nigeria. The analytical techniques used are descriptive ...

  8. EGGS: CLEARING THE CHARGES, EXPLORING THE POTENTIAL ...

    African Journals Online (AJOL)

    0655711075

    Of all the various kinds of foods, an egg is special for its combination of all essential food nutrients in one item. However for much of the past 40 years, the public has ... (iron, phosphorus, calcium, potassium, thiamine, and riboflavin) and virtually all of the fat soluble vitamins (A, D, E and K). The approximate composition (by ...

  9. Bald eagle predation on common loon egg

    Science.gov (United States)

    DeStefano, Stephen; McCarthy, Kyle P.; Laskowski, Tom

    2010-01-01

    The Common Loon (Gavia immer) must defend against many potential egg predators during incubation, including corvids, Herring Gulls (Larus argentatus), raccoons (Procyon lotor), striped skunk (Mephitis mephitis), fisher (Martes pennanti), and mink (Neovison vison) (McIntyre 1988, Evers 2004, McCann et al. 2005). Bald Eagles (Haliaeetus leucocephalus) have been documented as predators of both adult Common Loons and their chicks (Vliestra and Paruk 1997, Paruk et al. 1999, Erlandson et al. 2007, Piper et al. 2008). In Wisconsin, where nesting Bald Eagles are abundant (>1200 nesting pairs, >1 young/pair/year), field biologists observed four instances of eagle predation of eggs in loon nests during the period 2002–2004 (M. Meyer pers. comm.). In addition, four cases of eagle predation of incubating adult loons were inferred from evidence found at the loon nest (dozens of plucked adult loon feathers, no carcass remains) and/or loon leg, neck, and skull bones beneath two active eagle nests, including leg bones containing the bands of the nearby (adult loon. However, although loon egg predation has been associated with Bald Eagles, predation events have yet to be described in peer-reviewed literature. Here we describe a photographic observation of predation on a Common Loon egg by an immature Bald Eagle as captured by a nest surveillance video camera on Lake Umbagog, a large lake (32 km2) at Umbagog National Wildlife Refuge (UNWR) in Maine.

  10. Sanitation in the Shell Egg Processing Environment

    Science.gov (United States)

    In the past, most of the regulations regarding egg processing are concerned with quality rather than safety. Hazard Analysis and Critical Control Point (HACCP) will be required by retailers or by the federal government. GMPs (Good Manufacturing Practices) and SSOPs (Sanitation Standard Operating P...

  11. Overview: Identification characters of Lepidoptera eggs (Insecta)

    Science.gov (United States)

    There are 160,000 species of described Lepidoptera, or moths and butterflies, on Earth. The egg stage is the least known biological stage of moths and butterflies and there have been very few comparative studies. The purpose of this video is to provide the few, major characteristics of Lepidoptera...

  12. eggNOG v3.0

    DEFF Research Database (Denmark)

    Powell, S.; Trachana, K.; Letunic, I.

    2012-01-01

    ranges enabling much more fine-grained orthology assignments; and (iii) the newly designed web page is considerably faster with more functionality. In total, eggNOG v3 contains 721,801 orthologous groups, encompassing a total of 4,396,591 genes. Additionally, we updated 4873 and 4850 original COGs...

  13. Oxygen requirement of separated hybrid catfish eggs

    Science.gov (United States)

    Channel catfish egg masses require hatchery water with over 7.8 ppm dissolved oxygen at 80° F (95% air saturation) to maintain maximum oxygen consumption as they near hatching. This concentration is called the critical oxygen requirement by scientists but for the purpose of this article we will call...

  14. Forecasting gypsy moth egg-mass density

    Science.gov (United States)

    Robert W. Campbell; Robert W. Campbell

    1973-01-01

    Several multiple regression models for gypsy moth egg-mass density were developed from data accumulated in eastern New England between 1911 and 1931. Analysis of these models indicates that: (1) The gypsy moth population system was relatively stable in either the OUTBREAK phase or the INNOCUOUS one; (2) Several naturally occurring processes that could terminate the...

  15. Towards the nonstick egg: designing fluorous proteins.

    Science.gov (United States)

    Neil, E; Marsh, G

    2000-07-01

    Anyone who has made scrambled eggs will have had cause to praise the properties of Teflon. Teflon's highly chemically inert and nonstick nature derives from the perfluorinated polymer polytetrafluoroethylene. Perfluorocarbons have unique and valuable physical properties not found in nature. By incorporating fluorine into proteins, it might be possible to produce biological molecules with novel and useful properties.

  16. Yolk concentrations of hormones and glucose and egg weight and egg dimensions in unincubated chicken eggs, in relation to egg sex and hen body weight

    NARCIS (Netherlands)

    Aslam, M. Aamir; Hulst, Marcel; Hoving-Bolink, Rita A. H.; Smits, Mari A.; de Vries, Bonnie; Weites, Ilse; Groothuis, Ton G. G.; Woelders, Henri

    2013-01-01

    Birds can manipulate offspring sex ratio under natural and experimental conditions and maternal hormones have been shown to be involved in this process. Studies also provided evidence for the presence of sex specific concentrations of yolk hormones in avian eggs. These findings led to the suggestion

  17. Yolk concentrations of hormones and glucose and egg weight and egg dimensions in unincubated chicken eggs, in relation to egg sex and hen body weight.

    NARCIS (Netherlands)

    Aslam, M.A.; Hulst, M.M.; Hoving-Bolink, A.H.; Smits, M.A.; Vries, de B.; Weites, I.; Groothuis, T.G.; Woelders, H.

    2013-01-01

    Birds can manipulate offspring sex ratio under natural and experimental conditions and maternal hormones have been shown to be involved in this process. Studies also provided evidence for the presence of sex specific concentrations of yolk hormones in avian eggs. These findings led to the suggestion

  18. Egg-laying rhythm in Drosophila melanogaster

    Indian Academy of Sciences (India)

    2008-12-31

    Dec 31, 2008 ... elled. In grasshoppers, the neural circuit has been identified to certain extent, and a large portion of the circuit is found to be completed by the end of embryonic development, well be- fore it is needed for the behaviour (Thompson and Roosevelt. 1998). This suggests that some egg-laying-related genes start.

  19. Sea urchin egg fertilization and development

    Science.gov (United States)

    Young, R. S.

    1971-01-01

    The effects of subgravity (much less than unit gravity) on fertilization, cell division, differentiation, and growth of a relatively simple biological system (eggs of the sea urchin Arbacia punctulata) were considered. The experiment was flown on Gemini 3 and recovered as scheduled. However, the experiment objectives were not achieved, primarily for mechanical reasons.

  20. Rheological changes in irradiated chicken eggs

    International Nuclear Information System (INIS)

    Ferreira, Lucia F. S.; Del Mastro, Nelida L.

    1998-01-01

    Pathogenic bacteria may cause foodborne illnesses. Humans may introduce pathogens into foods during production, processing, distribution and or preparation. Some of these microorganisms are able to survive conventional preservation treatments. Heat pasteurization, which is a well established and satisfactory means of decontamination/disinfection of liquid foods, cannot efficiently achieve a similar objective for solid foods. Extensive work carried out worldwide has shown that irradiation is efficient in eradicating foodborne pathogens like Salmonella spp. that can contaminate poultry products. In this work Co-60 gamma irradiation was applied to samples of industrial powder white, yolk and whole egg at doses between 0 and 25 kGy. Samples were rehydrated and the viscosity measured in a Brookfield viscosimeter, model DV III at 5, 15 and 25 degree sign C. The rheological behaviour among the various kinds of samples were markedly different. Irradiation with doses up to 5 kGy, known to reduced bacterial contamination to non-detectable levels, showed almost no variation of viscosity of irradiated egg white samples. On the other hand, whole or yolk egg samples showed some changes in rheological properties depending on the dose level, showing the predominance of whether polimerization or degradation as a result of the irradiation. Additionally, irradiation of yolk egg powder reduced yolk color as a function of the irradiation exposure implemented. The importance of these results are discussed in terms of possible industrial applications

  1. Frog egg growth, experiment S003

    Science.gov (United States)

    Young, R. S.; Tremor, J. W.

    1971-01-01

    The objective of experiment was to determine the effect of weightlessness on the ability of a fertilized frog egg to divide normally and to differentiate and form a normal embryo. This experiment was first attempted on the Gemini 8 mission and was completed only partially because of the early termination of that mission.

  2. eggNOG 4.5

    DEFF Research Database (Denmark)

    Huerta-Cepas, Jaime; Szklarczyk, Damian; Forslund, Kristoffer

    2016-01-01

    eggNOG is a public resource that provides Orthologous Groups (OGs) of proteins at different taxonomic levels, each with integrated and summarized functional annotations. Developments since the latest public release include changes to the algorithm for creating OGs across taxonomic levels, making ...

  3. eggNOG v4.0

    DEFF Research Database (Denmark)

    Powell, Sean; Forslund, Kristoffer; Szklarczyk, Damian Milosz

    2013-01-01

    With the increasing availability of various 'omics data, high-quality orthology assignment is crucial for evolutionary and functional genomics studies. We here present the fourth version of the eggNOG database (available at http://eggnog.embl.de) that derives nonsupervised orthologous groups (NOG...

  4. Isolation of Cholesterol from an Egg Yolk

    Science.gov (United States)

    Taber, Douglass F.; Li, Rui; Anson, Cory M.

    2011-01-01

    A simple procedure for the isolation of the cholesterol, by hydrolysis and extraction followed by column chromatography, is described. The cholesterol can be further purified by complexation with oxalic acid. It can also be oxidized and conjugated to cholestenone. The source of the cholesterol is one egg yolk, which contains about 200 mg of…

  5. Cluster forcing

    DEFF Research Database (Denmark)

    Christensen, Thomas Budde

    , Portugal and New Zealand have adopted the concept. Public sector interventions that aim to support cluster development in industries most often focus upon economic policy goals such as enhanced employment and improved productivity, but rarely emphasise broader societal policy goals relating to e.......g. sustainability or quality of life. The purpose of this paper is to explore how and to what extent public sector interventions that aim at forcing cluster development in industries can support sustainable development as defined in the Brundtland tradition and more recently elaborated in such concepts as eco...... in 2000 by the Welsh Automotive Task Force under the Welsh Assembly Government. The Accelerate programme takes basically different two directions: The first one, which was the first to be launched, is concerned with the upgrading of existing supply chains in the automotive industry in Wales. The programme...

  6. An analysis of the response of Sooty Tern eggs to sonic boom overpressures.

    Science.gov (United States)

    Ting, Carina; Garrelick, Joel; Bowles, Ann

    2002-01-01

    It has been proposed that sonic booms caused a mass hatching failure of Sooty Terns in the Dry Tortugas in Florida by cracking the eggshells. This paper investigates this possibility analytically, complementing previous empirical studies. The sonic boom is represented as a plane-wave excitation with an N-wave time signature. Two models for the egg are employed. The first model, intended to provide insight, consists of a spherical shell, with the embryo represented as a rigid, concentric sphere and the albumen as an acoustic fluid filling the intervening volume. The substrate is modeled as a doubling of the incident pressure. The second, numerical model includes the egg-shape geometry and air sac. More importantly, the substrate is modeled as a rigid boundary of infinite extent with acoustic diffraction included. The peak shell stress, embryo acceleration, and reactive force are predicted as a function of the peak sonic boom overpressure and compared with damage criteria from the literature. The predicted peak sonic boom overpressure necessary for egg damage is much higher than documented sonic boom overpressures, even for extraordinary operational conditions. Therefore, as with previous empirical studies, it is concluded that it is unlikely that sonic boom overpressures damage avian eggs.

  7. Hen Egg as an Antioxidant Food Commodity: A Review

    OpenAIRE

    Nimalaratne, Chamila; Wu, Jianping

    2015-01-01

    Intake of antioxidants through diet is known to be important in reducing oxidative damage in cells and improving human health. Although eggs are known for their exceptional, nutritional quality, they are not generally considered as antioxidant foods. This review aims to establish the importance of eggs as an antioxidant food by summarizing the current knowledge on egg-derived antioxidants. Eggs have various natural occurring compounds including the proteins ovalbumin, ovotransferrin and lysoz...

  8. Early-life gut microbiome and egg allergy.

    Science.gov (United States)

    Fazlollahi, Mina; Chun, Yoojin; Grishin, Alexander; Wood, Robert A; Burks, A Wesley; Dawson, Peter; Jones, Stacie M; Leung, Donald Y M; Sampson, Hugh A; Sicherer, Scott H; Bunyavanich, Supinda

    2018-01-10

    Gut microbiota may play a role in egg allergy. We sought to examine the association between early-life gut microbiota and egg allergy. We studied 141 children with egg allergy and controls from the multi-center Consortium of Food Allergy Research study. At enrollment (age 3 to 16 months), fecal samples were collected and clinical evaluation, egg specific IgE measurement, and egg skin prick test were performed. Gut microbiome was profiled by 16S rRNA sequencing. Analyses for the primary outcome of egg allergy at enrollment, and the secondary outcomes of egg sensitization at enrollment and resolution of egg allergy by age 8 years, were performed using Quantitative Insights into Microbial Ecology (QIIME), Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt), and Statistical Analysis of Metagenomic Profiles (STAMP). Compared to controls, increased alpha diversity and distinct taxa (PERMANOVA P=5.0x10 -4 ) characterized the early-life gut microbiome of children with egg allergy. Genera from the Lachnospiraceae, Streptococcaceae, and Leuconostocaceae families were differentially abundant in children with egg allergy. Predicted metagenome functional analyses showed differential purine metabolism by the gut microbiota of egg allergic subjects (Kruskal Wallis P adj =0.021). Greater gut microbiome diversity and genera from Lachnospiraceae and Ruminococcaceae were associated with egg sensitization (PERMANOVA P = 5.0x10 -4 ). Among those with egg allergy, there was no association between early-life gut microbiota and egg allergy resolution by age 8 years. The distinct early-life gut microbiota in egg allergic and egg-sensitized children identified by our study may point to targets for preventive or therapeutic intervention. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.

  9. Laying performance and egg qualities characteristics of Japanese ...

    African Journals Online (AJOL)

    There were also significantly higher values for the internal and external egg quality traits (egg weight, egg width, yolk index, Haugh unit, albumen height, albumen %, and yolk width) in T1, T2 and T3 compare to T4(10.00, 2.11, 0.17, 75.42, 1.55, 49.01and 37.3,). Key words: Egg quality, Japanese quail, laying characteristics, ...

  10. Co-60 irradation facility for hens eggs, radiation field parameters and energy absorption in the egg

    International Nuclear Information System (INIS)

    Giese, W.; Mueller-Buder, A.

    1981-01-01

    For irradiation experiments with 33 530 hens eggs to test the effect of γ-rays on the hatchability of chicken a 60 Co irradiation facility was constructed, which is described in this article. Physical parameters of the radiation field as the dose rate caused by a 60 Co point source in a distance r, the flux of γ-quantae and energy towards an egg and the role of 60 Co betarays are quantitatively described. The intensity decrease, the dose build-up factor and energy absorption due to the interaction of γ-rays with atoms of the eggs content were calculated. Thus this contribution should give an impression of the physical processes involved in the γ-irradiation of eggs and on the magnitude of energy absorbed therein. (orig.) [de

  11. Effects of egg washing and storage temperature on the quality of eggshell cuticle and eggs.

    Science.gov (United States)

    Liu, Yu-Chi; Chen, Ter-Hsin; Wu, Ying-Chen; Lee, Yi-Chain; Tan, Fa-Jui

    2016-11-15

    This study investigated the quality of washed and unwashed eggs stored at 7°C (WC and UC for washed and unwashed eggs, respectively) and 25°C (WR and UR for washed and unwashed eggs, respectively) for 4weeks. The results show that the Haugh unit, albumin pH, thick albumin ratio, yolk index, air cell size, and S-ovalbumin content of UC were significantly the most superior, followed by those of WC, WR, and UR, in that order. Scanning electron microscopy and cuticle staining confirmed the damages and decreased cuticle coverage caused by washing and extended storage. Attenuated total reflection Fourier transform infrared spectroscopy revealed that cuticle composition changed significantly after washing and storage (Pegg quality, and egg washing reduced cuticle coverage. Copyright © 2016 Elsevier Ltd. All rights reserved.

  12. Effect of Selected Luting Agents on the Retention of CAD/CAM Zirconia Crowns under Cyclic Environmental Pressure

    Directory of Open Access Journals (Sweden)

    Leyla Sadighpour

    2018-02-01

    Full Text Available Objectives: The aim of this study was to evaluate the retention strength of zirconia crowns luted with two types of resin cement under environmental pressure changes.Materials and Methods: Thirty zirconia crowns were fabricated by using computer-aided design/computer-aided manufacturing (CAD/CAM system and were cemented by Panavia F2.0 (PAN, hand-mixed RelyX Unicem (UNH, or auto-mix RelyX Unicem Aplicap (UNA cements on the corresponding extracted human molars. The samples were randomly divided into three groups according to the cement type. After 3000 thermal cycles, the cemented crowns were subjected to 24 pressure cycles (0 to 5 atmospheres. The retention force (N of the specimens was measured in a universal testing machine. To normalize the retentive force, the recorded force was divided by the surface area of each tooth for measuring the retentive strength (MPa. The mean retention strengths (and forces of the groups were compared by using one-way analysis of variance (ANOVA and Tukey’s honest significant difference (HSD test (α=0.05. The failure modes were also examined by using a stereomicroscope.Results: The retention values related to the evaluated resin cements were significantly different; the UNA group showed the highest retention strength (6.45±0.35 MPa followed by the UNH (4.99±0.47 MPa and PAN (4.45±0.39 MPa, P<0.001 groups. The adhesive failure mode was predominant in all the groups.Conclusions: The choice of resin cements and their mixing methods, which lead to differences in porosity, may affect the retention strength of zirconia crowns.

  13. Bioavailability of zinc from defatted soy flour, soy hulls and whole eggs as determined by intrinsic and extrinsic labeling techniques.

    Science.gov (United States)

    Meyer, N R; Stuart, M A; Weaver, C M

    1983-06-01

    Bioavailability of zinc from diets prepared from intrinsically and extrinsically labeled autoclaved, defatted soy flour and scrambled, freeze-dried egg was investigated in male rats marginally depleted in zinc. In one study, retention of zinc from intrinsically labeled soybean flour (73%) was significantly less than from 65ZnCl2 extrinsically added to a soy flour-based diet (80%). Zinc from intrinsically labeled soybean hulls and from soy flour diets containing 10% soybean hulls extrinsically labeled with 65ZnCl2 was as available as the zinc from the extrinsically labeled soy flour diet. In a second study, extrinsic and intrinsic labeling techniques gave a similar assessment of bioavailability of zinc from egg- and soy flour-based diets when extrinsic labeling was accomplished by thoroughly mixing 65ZnCl2 with the protein source prior to incorporation into the diet. Absorption of 65Zn was greater from egg diets than from soy flour diets and of intermediate value from mixed soy flour and egg (50:50, wt/wt) diets regardless of which protein source was labeled, indicating that the zinc entered a common pool.

  14. Fungal ovicidal activity on Toxocara canis eggs.

    Science.gov (United States)

    De Souza Maia Filho, Fernando; Nunes Vieira, Juliana; Aires Berne, Maria Elisabeth; Stoll, Franciele Elisa; Da Silva Nascente, Patricia; Pötter, Luciana; Brayer Pereira, Daniela Isabel

    2013-01-01

    Visceral toxocariasis is a parasitic zoonosis caused by Toxocara canis. The prevalence of this parasite in dogs, soil contamination and the resistance of eggs increase human exposure to the disease. Moreover, the difficulties of the control measures justify the need for alternative ones. The objective of this study was to evaluate the in vitro ovicidal activity of fungi isolated from soils from public places in the city of Pelotas, Rio Grande do Sul, Brazil, on Toxocara canis. Samples of soil from ten localities were inoculated onto Petri dishes with 2% water-agar (WA) that contained antibiotics, and incubated at 25°C/21 days. Isolated fungi were tested in vitro for ovicidal activity, with five replicates. One mL of an embryonated Toxocara canis egg suspension (10(3) eggs) was poured over the fungal cultures after 10 days of growth. At intervals of 7, 14 and 21 days, 100 eggs were removed from each plaque and evaluated by optical microscopy. Acremonium, Aspergillus, Bipolaris, Fusarium, Gliocladium, Mucor and Trichoderma were isolated from the soil. A significant ovicidal type 3 effect was observed in Trichoderma, Fusarium solani complex and Acremonium. Those isolates from the genus Trichoderma showed their ovicidal effect on the 14th day of fungus-egg interaction. The other fungal genera tested showed a type 2 effect. These results suggest that the use of Trichoderma and Fusarium solani complex in biological control of T. canis is promising; however, further studies should be performed. Copyright © 2012 Revista Iberoamericana de Micología. Published by Elsevier Espana. All rights reserved.

  15. Response of parasitoid egg load to host dynamics and implications for egg load evolution.

    Science.gov (United States)

    Phillips, C B; Kean, J M

    2017-07-01

    A theoretical debate about whether parasitoids should be time or egg limited now recognizes both as feasible, and interest has turned to determining the circumstances under which each might arise in the field, and their implications for parasitoid behaviour and evolution. Egg loads of parasitoids sampled from the field are predicted to show a negative response to host availability, but empirical support for this relationship is scarce. We measured how a parasitoid's egg load responded to seasonal fluctuations in host population density and recorded the predicted correlation. In early summer, parasitoids were at high risk of time limitation due to low host availability, and in late summer, their offspring were at greater risk of egg limitation due to high host availability. Despite clear seasonal changes in selection pressures on egg load and lifespan, the parasitoid showed no evidence of seasonal variation in its reproductive strategy. We made minor modifications to a previously published model to explore the effects of seasonal variation in host availability on optimal investments in eggs and lifespan and obtained several new results. In particular, under circumstances analogous to some of those observed in our field study, temporal stochasticity in reproductive opportunities can cause investments in eggs to increase, rather than decrease as previously predicted. Our model results helped to explain the parasitoid's lack of a seasonally varying reproductive strategy. Understanding the evolution of parasitoid egg load would benefit from a shift of research emphasis from purely stochastic variation in parasitoid reproductive opportunities to greater consideration of host dynamics. © 2017 European Society For Evolutionary Biology. Journal of Evolutionary Biology © 2017 European Society For Evolutionary Biology.

  16. Bioconversion of nitrogen in an eco-technical system for egg production

    Directory of Open Access Journals (Sweden)

    A. Gencheva

    2015-03-01

    Full Text Available Abstract. The present paper aims to assess nitrogen circulation in an eco-technical system for egg production. The experiments were conducted in modelled conditions in an anthropogenic ecosystem of the “mesocosm” type, in which the unit of the bio-consumers and three eco-technological chains modelling the unit of the bio-decomposers are modelled: manure storing for decontamination /a recommendation on good farming practices/, composting and anaerobic decomposition in an installation for biogas production. A new criterion was implemented for the assessment of the chemical heterogeneity in the biogenic nitrogen cycle in the modified trophic chain – retention coefficient /k/, which is defined as the ratio of nitrogen introduced into the system / nitrogen content in the feed: its quantity in the secondary biological production x 100. The chemical heterogeneity at the level of organisms /differences in the individual components of eggs/ and at the biocenotic level is established. The biogenic nitrogen cycle in the eco-technical chain for egg production is characterized by an uneven distribution in both products of the outflow. The largest amount of nitrogen is found in the egg whites (k = 0.45, while it decreases significantly in egg yolks (k = 0.17 and reaches k = 0.03 in the egg shell, a.k.a. heterogeneity on the level of organisms is established. The nitrogen compounds introduced through the feed ration are concentrated in manure (k = 25.33. Losses of nitrogen are established in two of the manure utilization technologies. The quantity of /k/ in the compost is 20.32, a.k.a. the loss of nitrogen compounds is 19.8%. The biggest losses are found in manure storage; according to the recommendations on good farming practices (k = 18.82 or the reduction of nitrogen is 25.7% compared with fresh manure. Due to redistribution of the chemical elements /a significant part of C, H and O are included in biogas/, there is nitrogen concentration in bio slime

  17. The eggs of some blood-flukes (Trematoda: Schistosomatidae) from ...

    African Journals Online (AJOL)

    bear a spine, (ii) that the eggs should not possess an operculum, (iii) that the eggs should be embryonated (i.e. they should contain a fully-developed miracidium) and (iv) ... no knowledge of the rest of the life-cycle. The Giganlobilharzia eggs found in the faeces of Larus dominiconus and Aforus capensis during the present ...

  18. Pencils solution to an egg-citing problem

    Science.gov (United States)

    Lan, Boon Leong; Ooi, Gary; Keh, Chooi Yiang

    1999-02-01

    Here is an egg-citing contest that will make physics interesting and fun while allowing students to practice creative problem solving. Have each student drop a raw egg from an upper level of a building. The egg that falls fastest to the ground without breaking wins the contest.

  19. Eggs: clearing the charges, exploring the potential! | Amour | Dar Es ...

    African Journals Online (AJOL)

    Moreover researchers now not only prove eggs do not increase your blood cholesterol, but also link eggs to lowering high blood pressure by acting like an antihypertensive through an ACEI like inhibiting mechanism. Components in eggs were also found to be active as anti-adhesives, microbiocidals and as chelators in ...

  20. Bactericidal paper trays doped with silver nanoparticles for egg ...

    Indian Academy of Sciences (India)

    In this study, a cost-effective way to deposit the silver nanoparticles (AgNPs) on paper egg trays was developed, which proved suitable for prolonged storage of table eggs for house-hold use without deterioration of egg quality. Silver nanoparticles were synthesized based on chemical reduction approach and mixed with ...

  1. EGG TRANSFER AS AN ADJUNCT TO TWINNING IN CATTLE ...

    African Journals Online (AJOL)

    very has been based on flushing of the uterus or oviducts with a suitable medium thereby carrying the eggs along si- multaneoudy. Eggs are flushed under rigid aseptic condi- tions and stored in an incubator held at 30o to 37oC until transfer to the recipient is called for. Thc importance of egg media, re@very and transfer.

  2. 7 CFR 57.35 - Eggs in commerce.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Eggs in commerce. 57.35 Section 57.35 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards... Eggs in commerce. (a)(1) For eggs that moved or are moving in interstate or foreign commerce, no State...

  3. Performance and egg quality of aged laying hens fed diets ...

    African Journals Online (AJOL)

    p2492989

    receiving OSM produced more eggs and egg mass along with considerably greater feed intake than those on all the other .... initiation of the second egg production period, were housed in cages located in a three-deck battery-type cage block. .... Diets (in mash form) and water were provided for ad libitum consumption.

  4. Molecular cooking: Physical transformations in Chinese ‘century’ eggs

    NARCIS (Netherlands)

    Eiser, E.; Miles, C.S.; Geerts, N.; Verschuren, P.; MacPhee, C.E.

    2009-01-01

    Over two thousand years ago the Chinese developed a method to preserve eggs such that they remain edible for many months. The room temperature, physico-chemical preservation process that is used to prepare ‘century’ eggs transforms the egg white into a yellow, transparent gel with optical and

  5. 9 CFR 147.22 - Hatching egg sanitation.

    Science.gov (United States)

    2010-01-01

    ... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Hatching egg sanitation. 147.22... AGRICULTURE LIVESTOCK IMPROVEMENT AUXILIARY PROVISIONS ON NATIONAL POULTRY IMPROVEMENT PLAN Sanitation Procedures § 147.22 Hatching egg sanitation. Hatching eggs should be collected from the nests at frequent...

  6. Microbial quality and prevalence of Salmonella and Listeria in eggs

    Directory of Open Access Journals (Sweden)

    Manijeh Mahdavi

    2012-01-01

    Full Text Available Aims: This study was undertaken to determine the microbial quality and the prevalence of Salmonella and Listeria in table eggs in Isfahan, Iran. Materials and Methods: A total of 525 samples were randomly collected from various shops in Isfahan, Iran. Microbial quality of eggs evaluated by coliform count and total bacterial viable counts. Also, detection of Listeria and Salmonella in egg contents and on eggs shells was performed. Results: The mean of total viable bacteria and coliform counts in the egg contents were 3.95 × 10 4 CFU/g and 4.94 × 10 3 CFU/g, respectively. Salmonella and Listeria were not found on the shell or content of eggs. Enterobacteriaceae families were found in 357 of 525 (68.28% and 276 of 525 (52.44% of egg shell and egg content samples, respectively. Moreover, Pseudomonas aeruginosa was isolated from 175 (33.41% and 144 (25.37% of egg shell and egg content, respectively. The isolated Enterobacteriaceae were included: Enterobacter aerogenes, Escherichia coli, Klebsiella pneumoniae, Buttiauxella agrestis, Cedecea lapagei, Cedecea davisae and Erwinia herbicola. Conclusion: The findings of the present study indicate although Salmonella and Listeria were not found in egg samples; however, there is an urgent need to improve the hygienic level of consumed eggs.

  7. Ant-egg cataract. An electron microscopic study

    DEFF Research Database (Denmark)

    Schrøder, H D; Nissen, S H

    1979-01-01

    The ultrastructure of the ant-egg cataractous lens has been studied. Comparison of tissue demineralized by means of EDTA with untreated tissue showed the calcium salts in the ant-eggs to be mostly crystalline. A laminar appearance of the ant-egg seen in EDTA treated material suggested an intermit...

  8. Hatchability and fertility of indigenous chicken and duck eggs, and ...

    African Journals Online (AJOL)

    Flocks under study are located in the suburbs of Nairobi province and Machakos district. They belonged to smallholder farmers. Twenty seven clutches of eggs given to indigenous chickens to seat on, and 10 clutches of eggs given to ducks to seat on were investigated for six months. The number of eggs in each clutch ...

  9. Relationship between clutch size, egg volume and hatching success ...

    African Journals Online (AJOL)

    This study aimed to test the hypothesis that clutch size covaries with egg volume and hatching success in the Yellow-legged Gull Larus michahellis. We determined clutch size and egg volume in a sample of 131 nests, and we used the data to check whether egg volume varied among nests according to clutch size, while ...

  10. effects of hatching egg weight and length of storage period

    African Journals Online (AJOL)

    metinpetek

    Long egg storage periods affect the pH of the albumen due to loss of carbon dioxide (Dawes, 1975), which is important in maintaining embryonic viability, and result in decreased hatchability (Kirk et al., 1980;. Deeming, 2000; Heier & Jarp 2001). Eggs incubated on the day of lay produced heavier chicks than eggs stored for ...

  11. Quality of eggs produced by laying chickens fed lowgossypol ...

    African Journals Online (AJOL)

    Results indicated an increase in egg production with increasing levels of CSM in the diet up to 10 per cent level of inclusion. The addition of CSM to the diets had no significant effects on egg weight, Haugh unit values (HUV), yolk index, and yolk colour scores. However, egg yolk colour tended to improve with increasing ...

  12. Do All Ducks Lay Eggs? The Generic Overgeneralization Effect

    Science.gov (United States)

    Leslie, Sarah-Jane; Khemlani, Sangeet; Glucksberg, Sam

    2011-01-01

    Generics are statements such as "tigers are striped" and "ducks lay eggs". They express general, though not universal or exceptionless, claims about kinds (Carlson & Pelletier, 1995). For example, the generic "ducks lay eggs" seems true even though many ducks (e.g. the males) do not lay eggs. The universally quantified version of the statement…

  13. The significance of nonviable eggs for Daphnia population dynamics

    NARCIS (Netherlands)

    Boersma, M.; Vijverberg, J.

    1995-01-01

    Egg mortality was studied in populations of Daphnia galeata, Daphnia cucullata, and the hybrid between these species. In Tjeukemeer, a shallow eutrophic lake in the Netherlands, egg mortality in daphnids manifested itself as an apparent increase in the frequency of eggs in the early developmental

  14. The role of household composition in egg consumption in the ...

    African Journals Online (AJOL)

    This paper examined the role of household composition in egg consumption in Obafemi Awolowo University Community. An Ordinary Least Square regression model was used to obtain at-home demand function parameter estimates for egg. Positive and significant relationship was found between quantity of eggs ...

  15. Incubation of Spirometra eggs at laboratory conditions by Modified ...

    African Journals Online (AJOL)

    On day 6 the eggs started hatching coracidia. Under the circumstance it was fruitful to culture Spirometra eggs using modified Harada-Mori method. The modified Harada-Mori culture technology showed a high rate of hatching of Spirometra eggs. We recommend using this modified Harada-Mori method for culture of ...

  16. Assessment of hatchling egg losses and two chick sexing methods ...

    African Journals Online (AJOL)

    A total of 360 eggs of Nigerian Indigenous Chicken (NIC) was used to investigate hatchling egg losses, Sex determination at day old and weekly linear measurements were taken on 100 randomly selected Nigerian local chicks.The NIC had high fertility (86.67%) and hatchability of 69.17%. The egg total weight loss and ...

  17. Relationships among egg quality traits in Japanese quails over ...

    African Journals Online (AJOL)

    The study was carried out to evaluate the relationships among egg quality traits over three generations of selection for egg production. Eggs were obtained at the 9th week from 300, 450 and 320 adult quails in Generation zero (G0), one (G1) and two (G2), respectively. There were significant (p<0.05-0.01) positive and ...

  18. Tips to Reduce Your Risk of Salmonella from Eggs

    Centers for Disease Control (CDC) Podcasts

    2010-08-19

    Eggs are one of nature's most nutritious and economical foods, but you must take special care when handling and preparing fresh eggs and egg products to avoid food poisoning.  Created: 8/19/2010 by National Center for Emerging and Zoonotic Infectious Diseases, Division of Foodborne, Waterborne, and Environmental Diseases (NCEZID/DFWED).   Date Released: 8/19/2010.

  19. Relationship between egg weight, hatch weight and subsequent ...

    African Journals Online (AJOL)

    Three hundred (300) Fulani Ecotype (FE) chicken eggs collected from free ranged Fulani Ecotype chicken were used to study the effect of egg weight on hatch weight and subsequent body weight. Eggs were grouped into two according to their weight (small and medium) and incubated. Body weight of the chicks was ...

  20. Effects of gamma radiation on the Mediterranean flour moth eggs and acceptability of irradiated eggs by trichogramma cacoeciae females

    International Nuclear Information System (INIS)

    Mansour, M.

    2008-12-01

    The sensitivity of the Mediterranean flour moth, Ephestia kuehniella, eggs in different stages of development to gamma irradiation was studied and the acceptability of irradiated eggs by Trichogramma cacoeciae females was examined. In addition, the developmental rate of immature stages (larvae and pupae), resulting from irradiated eggs, to the adult stage was examined and the acceptance of irradiated eggs to T. cacoeciae females was evaluated. Results showed that the radio-sensitivity of E. kuehniella eggs decreased with increasing age. Irradiation also negatively affected survival to the adult stage and the rate of development of immature stages (larvae and pupae) to adults. In addition, the rate of development of immature stages resulting from irradiated eggs was negatively affected. Furthermore, irradiation positively affected the degree of acceptance of eggs to parasitization; irradiated eggs were more acceptable to T. cacoeciae than cold treated ones. (Author)

  1. Effect of Olive Leaf (Olea europaea) Powder on Laying Hens Performance, Egg Quality and Egg Yolk Cholesterol Levels.

    Science.gov (United States)

    Cayan, H; Erener, G

    2015-04-01

    This experiment was conducted to measure the effects of olive leaf powder on performance, egg yield, egg quality and yolk cholesterol level of laying hens. A total of 120 Lohmann Brown laying hens of 22 weeks old were used in this experiment. The birds were fed on standard layer diets containing 0, 1%, 2%, or 3% olive leaf powder for 8 weeks. Egg weight and yield were recorded daily; feed intake weekly; egg quality and cholesterol content at the end of the trial. Olive leaf powder had no effect on feed intake, egg weight, egg yield and feed conversion ratio (p>0.05) while olive leaf powder increased final body weight of hens (pcholesterol content was tended to decrease about 10% (p>0.05). To conclude, olive leaf powder can be used for reducing egg yolk cholesterol content and egg yolk coloring agent in layer diets.

  2. Immunoreactivity of hen egg allergens: influence on in vitro gastrointestinal digestion of the presence of other egg white proteins and of egg yolk.

    Science.gov (United States)

    Martos, Gustavo; López-Fandiño, Rosina; Molina, Elena

    2013-01-15

    Hen egg white comprises of a complex mixture of proteins, which greatly differ in their physicochemical characteristics and relative abundance. We aimed to identify potential undiscovered egg allergens within the egg white proteome and investigated the existence of matrix effects on the proteolytic stability and resultant IgE-binding of the allergenic proteins. In addition to the main egg allergens: ovalbumin (OVA), ovomucoid (OM) and lysozyme (LYS), two minor egg white proteins, tentatively identified as ovoinhibitor and clusterin, were found to react with serum IgE from egg-allergic patients. Egg white exhibited residual immunoreactivity after gastrointestinal digestion due to the presence of intact OVA and LYS, as well as of several IgE-binding peptides derived from OVA. The presence of egg yolk slightly increased the susceptibility to hydrolysis of egg white proteins and abrogated bile salt-induced precipitation of LYS in the duodenal medium. However, the resultant immunoreactivity against IgE of egg white proteins after in vitro digestion was not significantly modified by the presence of yolk components. Copyright © 2012 Elsevier Ltd. All rights reserved.

  3. Noise-activated diffusion in the egg-carton potential

    Science.gov (United States)

    Caratti, G.; Ferrando, R.; Spadacini, R.; Tommei, G. E.

    1996-11-01

    The noise-activated diffusion of a classical particle in spatially periodic two-dimensional (2D) systems is studied by solving the corresponding Fokker-Planck equation. The particle is subjected to a periodic deterministic force, to a frictional force, and to a Gaussian white noise. The solution is obtained by extending to 2D the matrix-continued-fraction method for a quite general potential shape. The 2D diffusion coefficient is then numerically calculated for the square egg-carton potential; the analysis is performed over different friction and energy-barrier regimes. Several approximations are compared with the exact numerical results. In particular, the usual 1D diffusion-path approximation is discussed, showing that 2D effects are always present, becoming more and more relevant with decreasing friction. At high friction, a good analytical approximation is shown; on the contrary, none of the available approximations gives satisfactory results in intermediate- and low-damping regimes, which are typical in adatom diffusion on crystal surfaces.

  4. Breastfeeding reduces postpartum weight retention

    DEFF Research Database (Denmark)

    Baker, Jennifer Lyn; Gamborg, Michael; Heitmann, Berit L

    2008-01-01

    BACKGROUND: Weight gained during pregnancy and not lost postpartum may contribute to obesity in women of childbearing age. OBJECTIVE: We aimed to determine whether breastfeeding reduces postpartum weight retention (PPWR) in a population among which full breastfeeding is common and breastfeeding...... duration is long. DESIGN: We selected women from the Danish National Birth Cohort who ever breastfed (>98%), and we conducted the interviews at 6 (n = 36 030) and 18 (n = 26 846) mo postpartum. We used regression analyses to investigate whether breastfeeding (scored to account for duration and intensity......) reduced PPWR at 6 and 18 mo after adjustment for maternal prepregnancy body mass index (BMI) and gestational weight gain (GWG). RESULTS: GWG was positively (P Breastfeeding was negatively associated with PPWR in all women but those...

  5. Radionuclide Retention in Concrete Wasteforms

    Energy Technology Data Exchange (ETDEWEB)

    Bovaird, Chase C.; Jansik, Danielle P.; Wellman, Dawn M.; Wood, Marcus I.

    2011-09-30

    Assessing long-term performance of Category 3 waste cement grouts for radionuclide encasement requires knowledge of the radionuclide-cement interactions and mechanisms of retention (i.e., sorption or precipitation); the mechanism of contaminant release; the significance of contaminant release pathways; how wasteform performance is affected by the full range of environmental conditions within the disposal facility; the process of wasteform aging under conditions that are representative of processes occurring in response to changing environmental conditions within the disposal facility; the effect of wasteform aging on chemical, physical, and radiological properties; and the associated impact on contaminant release. This knowledge will enable accurate prediction of radionuclide fate when the wasteforms come in contact with groundwater. The information present in the report provides data that (1) measures the effect of concrete wasteform properties likely to influence radionuclide migration; and (2) quantifies the rate of carbonation of concrete materials in a simulated vadose zone repository.

  6. Natural course of sensitization to hen's egg in children not previously exposed to egg ingestion.

    Science.gov (United States)

    de Boissieu, D; Dupont, C

    2006-04-01

    Clinical adverse reactions to egg may occur in infants or children who have never eaten egg. They may be sensitized or even react at first egg ingestion. Few studies are available concerning the reality of egg white allergy in such sensitized children, the natural evolution of this condition and the appropriate decisions to make. To analyze the actuality and natural course of egg allergy in children sensitized without previous of hen's egg ingestion. We set up a clinical decision tree based on clinical history and specific egg white IgE to manage patients who had never ingested egg but were sensitized as demonstrated by a positive SPT and report a cohort of 30 such children The mean level of egg white specific IgE at first analysis, i.e. before 12 months, was high, 28.3 KU(A) /L, with a large range, from 0.6 to >100 KU(A) /L, below 6 KU(A) /L in only 8 patients. In 6 children ("no challenge" group), IgE values remained >8 KU(A) /L by the end of the survey and the oral challenge with egg was always denied. Their mean + SD IgE level was at 51.7 + 38 KU(A) /L at 1 year and 19.7 + 13 KU(A) /L at a mean age of 34 + 5 months. All had an associated anaphylactic reaction with milk and 5 were still allergic to milk by the end of the survey. In the remaining 24 infants, egg was given for the first time at a mean age of 30 + 9 months, by error in 4 cases, all exhibiting an immediate reaction, and in a hospital setting in 20, among whom 14 reacted. Among those 18, with a specific IgE level at 9.1 + 10 KU(A) /L at 28 + 9 months, 4 became tolerant between 3 and 4 years, with specific IgE levels below 1.3 KU(A) /L and a 5th one with specific IgE >100 KU(A) /L at 6 months tolerated scrambled eggs at age 7 year, with specific IgE at 2.6 KU(A) /L. In the 6 others, labeled "non allergic", egg white specific IgE levels were significantly lower, whatever the age, than in the "no challenge" group. The age at challenge was 35 + 8 months, with a mean specific IgE level at 1.0 + 0.9 KU

  7. 7 CFR 70.54 - Retention authorities.

    Science.gov (United States)

    2010-01-01

    ... Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE (CONTINUED) REGULATIONS AND STANDARDS UNDER THE AGRICULTURAL MARKETING ACT OF 1946 AND THE EGG PRODUCTS INSPECTION ACT (CONTINUED) VOLUNTARY GRADING OF POULTRY...

  8. Izumo1 and Juno: the evolutionary origins and coevolution of essential sperm-egg binding partners.

    Science.gov (United States)

    Grayson, Phil

    2015-12-01

    Reproductive proteins are among the most rapidly evolving classes of proteins. For a subset of these, rapid evolution is driven by positive Darwinian selection despite vital, well-conserved, reproductive functions. Izumo1 is the only essential sperm-egg fusion protein currently known on mammalian sperm, and its egg receptor (Juno; formerly Folr4) was recently discovered. Male knockout mice for Izumo1 and female knockout mice for Juno are both healthy but sterile. Here, both sperm-egg binding proteins are shown to be evolving under positive selection. Within mammals, coevolution of Izumo1 and Juno is also uncovered, suggesting that similar forces have shaped the evolutionary histories of these binding partners within Mammalia. Additionally, genomic analyses reveal an ancient origin for the Izumo gene family, initially reported as conserved exclusively in mammals. Newly identified Izumo1 orthologues could serve reproductive functions in birds, fish and reptiles. Surprisingly, these same analyses support Juno's presence in mammals alone, suggesting a recent mammalian-specific duplication and neofunctionalization of the ancestral folate receptor. Despite the indispensability of their reproductive interaction, and their apparent coevolution within Mammalia, this binding pair arose through strikingly different evolutionary forces.

  9. Izumo1 and Juno: the evolutionary origins and coevolution of essential sperm–egg binding partners

    Science.gov (United States)

    Grayson, Phil

    2015-01-01

    Reproductive proteins are among the most rapidly evolving classes of proteins. For a subset of these, rapid evolution is driven by positive Darwinian selection despite vital, well-conserved, reproductive functions. Izumo1 is the only essential sperm–egg fusion protein currently known on mammalian sperm, and its egg receptor (Juno; formerly Folr4) was recently discovered. Male knockout mice for Izumo1 and female knockout mice for Juno are both healthy but sterile. Here, both sperm–egg binding proteins are shown to be evolving under positive selection. Within mammals, coevolution of Izumo1 and Juno is also uncovered, suggesting that similar forces have shaped the evolutionary histories of these binding partners within Mammalia. Additionally, genomic analyses reveal an ancient origin for the Izumo gene family, initially reported as conserved exclusively in mammals. Newly identified Izumo1 orthologues could serve reproductive functions in birds, fish and reptiles. Surprisingly, these same analyses support Juno's presence in mammals alone, suggesting a recent mammalian-specific duplication and neofunctionalization of the ancestral folate receptor. Despite the indispensability of their reproductive interaction, and their apparent coevolution within Mammalia, this binding pair arose through strikingly different evolutionary forces. PMID:27019721

  10. Relationship between specific IgE to egg components and natural history of egg allergy in Danish children

    DEFF Research Database (Denmark)

    Gradman, Josefine; Mortz, Charlotte G; Eller, Esben

    2016-01-01

    BACKGROUND: The majority of egg-allergic children develop tolerance over time. However, it may take numerous of consecutive egg challenges to get there as no good indices to predict tolerance exist. OBJECTIVE: To investigate whether serial measurements of specific IgE to egg white, ovomucoid, ova...

  11. Multiplication in egg yolk and survival in egg albumen of genetically and phenotypically characterized Salmonella Enteritidis strains

    Science.gov (United States)

    Prompt refrigeration of eggs to prevent the multiplication of Salmonella Enteritidis to high levels during storage is an important practice for reducing the risk of egg-transmitted human illness. The efficacy of egg refrigeration for achieving this goal depends on the location of contamination, the ...

  12. Evaluation of retention of cemented laser-sintered crowns on unmodified straight narrow implant abutments.

    Science.gov (United States)

    Kilicarslan, Mehmet Ali; Ozkan, Pelin

    2013-01-01

    A common problem with cemented crowns is inadequate retention at the crown-abutment interface. The aim of this study was to compare the retention of new laser-sintered cobalt-chromium alloy crowns to the retention of cobalt-chromium alloy crowns fabricated with a traditional casting technique with and without an alloy primer. Twenty-four metallic crowns per casting technique were fabricated, and surface roughness values were recorded with a profilometer. Alloy primer was applied to half the specimens, and all crowns were luted with resin cement. After 24 hours, specimens were subjected to tensile force application with a universal testing machine. The effect of the cement amount was evaluated with an analytic balance. The results were compared using the Kruskal-Wallis multiple-comparison test. The Spearman correlation was used to determine correlations between crown retention and cement weight. The laser-sintered crowns (2.72 μm) were rougher than conventionally cast crowns. The mean load to failure values were as follows: 455.10 ± 192.69 Ncm for conventional crowns, 565.52 ± 112.87 Ncm for conventional crowns with alloy primer, 534.78 ± 130.15 Ncm for laser-sintered crowns, and 678.60 ± 212.83 Ncm for laser-sintered crowns with alloy primer. Laser-sintered crowns (10.10 ± 2.15 mg) showed a significant difference in terms of cement weight compared with cast crowns. In addition, negative correlations were found for retention and cement weight between all groups, except for the laser-sintered group without alloy primer. Retentive forces were significantly higher for laser-sintered crowns than for conventionally cast crowns. An increase in the surface roughness and the application of alloy primers led to an increase in the adhesive bonding of resin cements to metal alloys. It was concluded that a reduction in cement weight improved retention.

  13. 12 CFR 609.945 - Records retention.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 6 2010-01-01 2010-01-01 false Records retention. 609.945 Section 609.945 Banks and Banking FARM CREDIT ADMINISTRATION FARM CREDIT SYSTEM ELECTRONIC COMMERCE Standards for Boards and Management § 609.945 Records retention. Records stored electronically must be accurate, accessible, and reproducible for later reference...

  14. Emotional Intelligence and Nursing Student Retention

    Science.gov (United States)

    Wilson, Victoria Jane

    2013-01-01

    The study examined the constructs of a Multi-Intelligence Model of Retention with four constructs: cognitive and emotional-social intelligence, student characteristics, and environmental factors. Data were obtained from sophomore students entering two diploma, nine associate, and five baccalaureate nursing programs. One year later, retention and…

  15. Faculty Personality: A Factor of Student Retention

    Science.gov (United States)

    Shaw, Cassandra S.; Wu, Xiaodong; Irwin, Kathleen C.; Patrizi, L. A. Chad

    2016-01-01

    The purpose of this study was to determine the relationship between student retention and faculty personality as it was hypothesized that faculty personality has an effect on student retention. The methodology adopted for this study was quantitative and in two parts 1) using linear regression models to examine the impact or causality of faculty…

  16. African Retentions in Blues and Jazz.

    Science.gov (United States)

    Meadows, Eddie S.

    1979-01-01

    The perseverance of African musical characteristics among American Blacks is an historic reality. African retentions have been recorded in Black music of the antebellum period. Various African scales and rhythms permeate Black American music today as evidenced in the retentions found in blues and jazz. (RLV)

  17. Minority Teacher Recruitment and Retention Strategies

    Science.gov (United States)

    Kearney-Gissendaner, Janet E.

    2010-01-01

    The tools and resources in this book help school leaders seamlessly incorporate minority teacher recruitment and retention programs into current human-resources activities. With details about exemplary minority teacher recruitment and retention programs, this book also showcases strategies for how to replicate such programs in your own school or…

  18. Black Student Retention in Higher Education.

    Science.gov (United States)

    Lang, Marvel, Ed.; Ford, Clinita A., Ed.

    This collection focuses on problems in the recruitment, enrollment and retention of Blacks in higher education in America. The following chapters are provided: "The Black Student Retention Problem in Higher Education: Some Introductory Perspectives" (Marvel Lang); "Early Acceptance and Institutional Linkages in a Model Program of Recruitment,…

  19. Profile in Action: Linking Admission and Retention

    Science.gov (United States)

    Cortes, Carla M.

    2013-01-01

    A profile-oriented retention strategy embraces the admission process as a powerful lever in improving retention and completion rates and recognizes that the student profile can be shaped by changes in admission policies or priorities--even within the current market position of the institution. In addition, the student body can be oriented toward…

  20. Employee Retention Strategies And Organizational Performance ...

    African Journals Online (AJOL)

    The study empirically examines the relationship between employee retention strategies and organizational performance. Using a sample size of 120 respondents in a leading beverage establishment in Nigeria, the results shows that organizations with adequate employee retention strategies in form of enhanced and ...

  1. Positive Youth Development and Undergraduate Student Retention

    Science.gov (United States)

    Demetriou, Cynthia; Powell, Candice

    2014-01-01

    The primary theoretical tradition in the study of college retention has been sociological. A review and synthesis of common themes of development among traditional-age, college students suggests that a developmental perspective on the retention of youth in college may have more to offer than the dominant sociological paradigm. This article argues…

  2. 76 FR 34010 - Credit Risk Retention

    Science.gov (United States)

    2011-06-10

    ... 2501-AD53 Credit Risk Retention AGENCIES: Office of the Comptroller of the Currency, Treasury (OCC... credit risk retention requirements of section 15G of the Securities Exchange Act of 1934, as added by the Dodd-Frank Wall Street Reform and Consumer Protection Act (``Credit Risk NPR'' or ``proposed rule...

  3. Army Cyber Mission Force - Ambitions and Realities

    Science.gov (United States)

    2015-05-21

    Academy, while influential at the time, focused solely on the Millennials .11 Missing was the focus on Force 2025 and Beyond. The soldiers that will...See recruiting, Development, and Retention of Cyber Warriors Despite an Inhospitable Culture in July 2012 edition of Small Wars Journal. 11 Millennials ...include reduced rates for wireless services, wellness programs, adoption assistance, financial planning, and stock purchase plans. All of these

  4. Rebalancing the Air Force: A Comprehensive Solution

    Science.gov (United States)

    2011-02-16

    AIR WAR COLLEGE AIR UNIVERSITY REBALANCING THE AIR FORCE A COMPREHENSIVE SOLUTION By Bruce K Johnson, Lt Col USAF A Research Report ...and experience levels will all benefit. Senior leaders should crosscheck the recruiting and retention data along with experience trends using the...content/dav/mhf/QOL- Library/Project%20Documents/MilitaryHOMEFRONT/ Reports /2008%20Demographics.pdf P.6 7 2010 Army Posture Statement, Addendum F

  5. Comparative analysis of the retention of maxillary denture base with and without border molding using zinc oxide eugenol impression paste.

    Science.gov (United States)

    Kaur, Simrat; Datta, Kusum; Gupta, S K; Suman, Neelam

    2016-01-01

    The purpose of the study was to determine the effect of border molding on the retention of the maxillary denture base. Two special trays, one with full extensions to the periphery and one 2 mm short from the borders were made on the cast obtained from the preliminary impression. Border molding was done on the tray which was short from borders. On both trays, the final impression was made with zinc oxide eugenol impression paste. Heat cure denture bases were fabricated on the prepared casts and retention was measured using specially designed instrument. Mean force with border molding (2765.0 g) was larger than mean force without border molding (1805.0 g) at P border molding will provide better retentive force than the dentures made without border molding.

  6. Computed tomographic evaluation of dinosar egg shell integrity

    International Nuclear Information System (INIS)

    Jones, J.C.; Greenberg, W.; Ayers, S.

    1998-01-01

    The purpose of this study was to determine whether computed tomography (CT) could be used to identify hatching holes in partially embedded dinosaur eggs. One Faveololithus and two Dendroolithus eggs were examined using a fourth generation CT scanner. The eggs were partially embedded in a fossilized sediment matrix, with the exposed portion of the shell appearing intact. In CT images of all three eggs, the shells appeared hyperdense relative to the matrix. Hatching holes were visible as large gaps in the embedded portion of the shell, with inwardly displaced shell fragments. It was concluded that CT is an effective technique for nondestructively assessing dinosaur egg shell integrity

  7. Hen Egg as an Antioxidant Food Commodity: A Review

    Science.gov (United States)

    Nimalaratne, Chamila; Wu, Jianping

    2015-01-01

    Intake of antioxidants through diet is known to be important in reducing oxidative damage in cells and improving human health. Although eggs are known for their exceptional, nutritional quality, they are not generally considered as antioxidant foods. This review aims to establish the importance of eggs as an antioxidant food by summarizing the current knowledge on egg-derived antioxidants. Eggs have various natural occurring compounds including the proteins ovalbumin, ovotransferrin and lysozyme in egg white, as well as phosvitin, carotenoids and free aromatic amino acids in egg yolk. Some lipophilic antioxidants such as vitamin E, carotenoids, selenium, iodine and others can be transferred from feed into egg yolk to produce antioxidant-enriched eggs. The bioactivity of egg antioxidants can be affected by food processing, storage and gastrointestinal digestion. Generally thermal processing methods can promote loss of antioxidant properties in eggs due to oxidation and degradation, whereas gastrointestinal digestion enhances the antioxidant properties, due to the formation of new antioxidants (free amino acids and peptides). In summary, in addition to its well-known nutritional contribution to our diet, this review emphasizes the role of eggs as an important antioxidant food. PMID:26404361

  8. Characteristics of reared game pheasant (Phasianus colchicus’s egg

    Directory of Open Access Journals (Sweden)

    Luigi Guidobono Cavalchini

    2010-01-01

    Full Text Available Chemical and physical characteristics of game pheasant (Phasianus colchicus’s egg were studied and compared with domesticfowl (Gallus gallus domesticus’s egg. The birds were housed in individual cages in a environmentally controlled room(T=18÷20°C; 16L:8D and fed ad libitum standard breeder diet. A sample of thirty eggs was analysed for each phase of thelaying period (beginning, peak and end. The following chemico-physical parameters: egg, albumen, yolk and shell weight;yolk colour; egg and shell dry matter (DM; shell thickness (blunt end, pointed end and middle part were measured. Theprotein, lipid, and cholesterol content was evaluated; the fatty acid (FA profile analysed. We observed: egg weight averageof 34.5g ; a high proportion of yolk (37% in the whole egg (Y/E, consequently, a high lipid content of 13.9%; a protein contentDM of 44.3%; the fatty acid composition was similar to that of chicken egg and the oleic acid (36.4% was the majorproportion of the total fatty acids, as in the domestic fowl. The rearing pheasant’s egg has a high nutritive concentration, dueto high ratio yolk/whole egg, with biological and nutritional characteristics similar to domestic fowl’s egg.

  9. Hen Egg as an Antioxidant Food Commodity: A Review.

    Science.gov (United States)

    Nimalaratne, Chamila; Wu, Jianping

    2015-09-24

    Intake of antioxidants through diet is known to be important in reducing oxidative damage in cells and improving human health. Although eggs are known for their exceptional, nutritional quality, they are not generally considered as antioxidant foods. This review aims to establish the importance of eggs as an antioxidant food by summarizing the current knowledge on egg-derived antioxidants. Eggs have various natural occurring compounds including the proteins ovalbumin, ovotransferrin and lysozyme in egg white, as well as phosvitin, carotenoids and free aromatic amino acids in egg yolk. Some lipophilic antioxidants such as vitamin E, carotenoids, selenium, iodine and others can be transferred from feed into egg yolk to produce antioxidant-enriched eggs. The bioactivity of egg antioxidants can be affected by food processing, storage and gastrointestinal digestion. Generally thermal processing methods can promote loss of antioxidant properties in eggs due to oxidation and degradation, whereas gastrointestinal digestion enhances the antioxidant properties, due to the formation of new antioxidants (free amino acids and peptides). In summary, in addition to its well-known nutritional contribution to our diet, this review emphasizes the role of eggs as an important antioxidant food.

  10. Effects of some pesticides on development of Ascaris suum eggs.

    Science.gov (United States)

    Yu, Yong-Man; Kim, Jin-Won; Na, Won-Seok; Youn, Young-Nam; Choi, In-Wook; Lee, Young-Ha

    2014-02-01

    To evaluate the effects of pesticides to parasite eggs, Ascaris suum eggs were incubated with 5 different pesticides (1:1,500-1:2,000 dilutions of 2% emamectin benzoate, 5% spinetoram, 5% indoxacarb, 1% deltamethrin, and 5% flufenoxuron; all v/v) at 20℃ for 6 weeks, and microscopically evaluated the egg survival and development on a weekly basis. The survival rate of A. suum eggs incubated in normal saline (control eggs) was 90±3% at 6 weeks. However, the survival rates of eggs treated with pesticides were 75-85% at this time, thus significantly lower than the control value. Larval development in control eggs commenced at 3 weeks, and 73±3% of eggs had internal larvae at 6 weeks. Larvae were evident in pesticide-treated eggs at 3-4 weeks, and the proportions of eggs carrying larvae at 6 weeks (36±3%-54±3%) were significantly lower than that of the control group. Thus, pesticides tested at levels similar to those used in agricultural practices exhibited low-level ovicidal activity and delayed embryogenesis of A. suum eggs, although some differences were evident among the tested pesticides.

  11. What determines hatchling weight: breeder age or incubated egg weight?

    Directory of Open Access Journals (Sweden)

    AB Traldi

    2011-12-01

    Full Text Available Two experiments were carried out to determine which factor influences weight at hatch of broiler chicks: breeder age or incubated egg weight. In Experiment 1, 2340 eggs produced by 29- and 55-week-old Ross® broiler breeders were incubated. The eggs selected for incubation weighed one standard deviation below and above average egg weight. In Experiment 2, 2160 eggs weighing 62 g produced by breeders of both ages were incubated. In both experiments, 50 additional eggs within the weight interval determined for each breeder age were weighed, broken, and their components were separated and weighed. At hatch, hatchlings were sexed and weighed, determining the average initial weight of the progeny of each breeder age. Data were analyzed using the Analyst program of SAS® software package. In Experiment 1, the weight difference between eggs produced by young and mature breeders was 10.92 g, and the component that mostly influenced this difference was the yolk (7.51 g heavier in mature breeders, compared with 4.23 g difference in albumen and 0.8 g in eggshell weights. Hatchling weight difference was 9.4 g higher in eggs from mature breeders. In Experiment 2, egg weight difference was only 0.74 g, but yolk weight was 4.59 g higher in the eggs of mature breeders. The results obtained in the present study indicate that hatchling weight is influenced by egg weight, and not by breeder age.

  12. Hen Egg as an Antioxidant Food Commodity: A Review

    Directory of Open Access Journals (Sweden)

    Chamila Nimalaratne

    2015-09-01

    Full Text Available Intake of antioxidants through diet is known to be important in reducing oxidative damage in cells and improving human health. Although eggs are known for their exceptional, nutritional quality, they are not generally considered as antioxidant foods. This review aims to establish the importance of eggs as an antioxidant food by summarizing the current knowledge on egg-derived antioxidants. Eggs have various natural occurring compounds including the proteins ovalbumin, ovotransferrin and lysozyme in egg white, as well as phosvitin, carotenoids and free aromatic amino acids in egg yolk. Some lipophilic antioxidants such as vitamin E, carotenoids, selenium, iodine and others can be transferred from feed into egg yolk to produce antioxidant-enriched eggs. The bioactivity of egg antioxidants can be affected by food processing, storage and gastrointestinal digestion. Generally thermal processing methods can promote loss of antioxidant properties in eggs due to oxidation and degradation, whereas gastrointestinal digestion enhances the antioxidant properties, due to the formation of new antioxidants (free amino acids and peptides. In summary, in addition to its well-known nutritional contribution to our diet, this review emphasizes the role of eggs as an important antioxidant food.

  13. Housing system and laying hen strain impacts on egg microbiology.

    Science.gov (United States)

    Jones, D R; Anderson, K E

    2013-08-01

    Alternative hen housing is becoming more commonplace in the egg market. However, a complete understanding of the implications for alternative housing systems on egg safety has not been achieved. The current study examines the impact of housing Hy-Line Brown, Hy-Line Silver Brown, and Barred Plymouth Rock hens in conventional cage, cage-free, and free range egg production systems on shell microbiology. Eggs were collected at 4 sampling periods. Egg shell emulsion pools were formed and enumerated for total aerobic organisms, Enterobacteriaceae, and yeast and mold counts. Hy-Line Brown and Hy-Line Silver Brown hens produced eggs with significantly (P Eggs from conventional cages had significantly different (P eggs with significantly different (P eggs having the lowest level of contamination for the hen strains. There were no differences within each strain among housing systems for yeast and mold contamination. The study shows that hen strain has an effect on egg microbial levels for various housing systems, and egg safety should be considered when making hen strain selections for each housing system.

  14. An Innovative Support Structure for Gob-Side Entry Retention in Steep Coal Seam Mining

    OpenAIRE

    Jianguo Ning; Jun Wang; Tengteng Bu; Shanchao Hu; Xuesheng Liu

    2017-01-01

    This study considered longwall working face No. 41101—located in a steeply inclined coal seam at the Awuzisu coal mine in Xinjiang, China—as an example in which macroscopic shear cracks had occurred in the cement-based filling body of the gob-side entry retention structure. A mechanical model of the support structure for the gob-side entry retention was first established. Then, field observations and laboratory tests were used to obtain the force exerted by the coal wall on the main roof, the...

  15. Ballistocardiogram of avian eggs determined by an electromagnetic induction coil.

    Science.gov (United States)

    Ono, H; Akiyama, R; Sakamoto, Y; Pearson, J T; Tazawa, H

    1997-07-01

    As an avian embryo grows within an eggshell, the whole egg is moved by embryonic activity and also by the embryonic heartbeat. A technical interest in detecting minute biological movements has prompted the development of techniques and systems to measure the cardiogenic ballistic movement of the egg or ballistocardiogram (BCG). In this context, there is interest in using an electromagnetic induction coil (solenoid) as another simple sensor to measure the BCG and examining its possibility for BCG measurement. A small permanent magnet is attached tightly to the surface of an incubated egg, and then the egg with the magnet is placed in a solenoid. Preliminary model analysis is made to design a setup of the egg, magnet and solenoid coupling system. Then, simultaneous measurement with a laser displacement measuring system, developed previously, is made for chicken eggs, indicating that the solenoid detects the minute cardiogenic ballistic movements and that the BCG determined is a measure of the velocity of egg movements.

  16. Egg cannibalism and carnivory among three species of Toxorhynchites.

    Science.gov (United States)

    Linley, J R; Duzak, D

    1989-09-01

    In laboratory experiments, third and early fourth instar larvae of Toxorhynchites amboinensis, Tx. splendens and Tx. brevipalpis, previously starved 24 h, rapidly cannibalized eggs of their own species, or ate the eggs of other species present on the water surface in small containers. Toxorhynchites amboinensis and Tx. splendens larvae of either instar cannibalized eggs somewhat more rapidly than Tx. brevipalpis, probably because brevipalpis eggs distributed themselves around the edge of the container and were less accessible. When offered heterospecific eggs, fourth instar larvae of all three species ate them as efficiently as they cannibalized their own except that eggs of Tx. brevipalpis were eaten very slowly. Toxorhynchites amboinensis larvae were offered conspecific hatched eggs, and these also were consumed.

  17. Immunoglobulin in the eggs of the channel catfish (Ictalurus punctatus).

    Science.gov (United States)

    Hayman, J R; Lobb, C J

    1993-01-01

    Egg yolk proteins obtained from 2-3-day-old fertilized channel catfish eggs were analyzed to determine if immunoglobulin (Ig) was present. Using both monoclonal and polyclonal antibodies to catfish Ig, egg Ig was isolated and structurally characterized. The egg Ig when analyzed in SDS-gels under nonreducing conditions dissociated into eight distinct subpopulations with relative mobilities identical to that previously described for the serum Ig of the channel catfish. In addition, the component heavy (H) and light (L) chains of the egg Ig had similar relative mobilities as the H and L chains identified in serum Ig. Immunocytological studies using both polyclonal and monoclonal anti-catfish Ig showed that Ig was dispersed throughout the yolk of the egg. In addition these analyses indicated that Ig was localized within the external membranes (eggshell) of the egg.

  18. Effects of dietary yeast autolysate (Saccharomyces cerevisiae) on performance, egg traits, egg cholesterol content, egg yolk fatty acid composition and humoral immune response of laying hens.

    Science.gov (United States)

    Yalçin, Sakine; Yalçin, Suzan; Cakin, Kemal; Eltan, Onder; Dağaşan, Levent

    2010-08-15

    The objective of this study was to determine the effects of dietary yeast autolysate on performance, egg traits, egg cholesterol content, egg yolk fatty acid composition, lipid oxidation of egg yolk, some blood parameters and humoral immune response of laying hens during a 16 week period. A total of 225 Hyline Brown laying hens, 22 weeks of age, were allocated equally to one control group and four treatment groups. Yeast autolysate (Saccharomyces cerevisiae, InteWall) was used at levels of 1, 2, 3 and 4 g kg(-1) in the diets of the first, second, third and fourth treatment groups respectively. Dietary treatments did not significantly affect body weight, feed intake and egg traits. Yeast autolysate supplementation increased egg production (P egg weight (P egg yolk cholesterol level as mg g(-1) yolk (P cholesterol and triglyceride (P egg cholesterol content and humoral immune response. It is concluded that 2 g kg(-1) yeast autolysate will be enough to have beneficial effects in laying hens. Copyright (c) 2010 Society of Chemical Industry.

  19. The radurization of frozen whole eggs

    International Nuclear Information System (INIS)

    Niewiarowicz, A.; Fiszer, W.; Zabielski, J.; Starega, M.

    1980-01-01

    The liquid whole eggs packed into polyethylene bags had been frozen at - 12 0 C and then exposed to gamma rays (the doses of 0.25 and 0.50 Mrad). After the irradiation the samples were stored during 76 days at - 12 0 C and then for 5 days at 1 0 C. Microbial sterility was obtained after the exposure and during the storage under freezing conditions. The content of free fatty acids was lower in the irradiated samples in comparison to the control. The significant increase of TBA value was noted in the irradiated whole eggs since the 17th day of storage. There were not found any changes in baking and organoleptic properties except small sensoric differences detected in a triangular panel test. (author)

  20. The Effect of Addition Pineapple Peel Meal (Ananas comosus (L) Merr) in Diet on Total Egg and Egg Duck Quality

    OpenAIRE

    Muharlien Muharlien; Vitra Vitra; Muhammad Halim Natsir

    2012-01-01

    The aim of this research was to study the effect of addition pinneapple peel meal in diet on total egg and egg quality duck. Materials of the research were 60 mojosari ducks at seven months old. The treatment of pineapple peel meal addition in diet were treatment on level of 0, 2, 4, 6 and 8%. Variable were numbers of egg, egg shell thickness, fat and cholesterol egg yolk. The datas were analyzed using ANOVA from Randomized Block Design (RBD), if the result had significant effect, would be co...

  1. Heat resistance of Salmonella in various egg products.

    Science.gov (United States)

    Garibaldi, J A; Straka, R P; Ijichi, K

    1969-04-01

    The heat-resistance characteristics of Salmonella typhimurium Tm-1, a reference strain in the stationary phase of growth, were determined at several temperatures in the major types of products produced by the egg industry. The time required to kill 90% of the population (D value) at a given temperature in specific egg products was as follows: at 60 C (140 F), D = 0.27 min for whole egg; D = 0.60 min for whole egg plus 10% sucrose; D = 1.0 min for fortified whole egg; D = 0.20 min for egg white (pH 7.3), stabilized with aluminum; D = 0.40 min for egg yolk; D = 4.0 min for egg yolk plus 10% sucrose; D = 5.1 min for egg yolk plus 10% NaCl; D = 1.0 min for scrambled egg mix; at 55 C (131 F), D = 0.55 min for egg white (pH 9.2); D = 1.2 min for egg white (pH 9.2) plus 10% sucrose. The average Z value (number of degrees, either centigrade or fahrenheit, for a thermal destruction time curve to traverse one logarithmic cycle) was 4.6 C (8.3 F) with a range from 4.2 to 5.3 C. Supplementation with 10% sucrose appeared to have a severalfold greater effect on the heat stabilization of egg white proteins than on S. typhimurium Tm-1. This information should be of value in the formulation of heat treatments to insure that all egg products be free of viable salmonellae.

  2. Acute and chronic urine retention among adults at the urology ...

    African Journals Online (AJOL)

    E.M.T. Yenli

    AUR) and chronic urine retention. (CUR) are different and varied in both gender and age. Urine retention has been well studied among males worldwide, while data on urine retention among women are sparse. This study aimed at determining the.

  3. Unjuk Kerja Antena UWB Egg Berdasarkan Dimensinya

    OpenAIRE

    Yuwono, Rudy

    2010-01-01

    Televisi-televisi swasta di Indonesia bekerja menggunakan frekuensi yang berbeda-beda. Dilakukan analisa menggunakan antena UWB dengan bentuk egg terhadap berbagai macam dimensi untuk mengetahui kemampuan antena dalam menangkap frekuensi televisi-televisi swasta tersebut. Analisa terhadap Perubahan dimensi antena pada penelitian ini dilakukan dengan bantuan program simulasi pada komputer. Antena disimulasikan dengan 9 macam dimensi. Bahan yang digunakan adalah konduktor alumunium. Untuk menge...

  4. [Egg-shaped macro-lithiasis].

    Science.gov (United States)

    Richard, T; Hauzeur, C; Vanhaeverbeek, M

    2017-01-01

    We report a 76 years-old female patient who consults for left flank pain and inflammatory biology, due to the presence of an egg-shaped 5 cm diameter macro-lithiasis. Because of the presence of a Proteus bacteriuria, the patient receives a 7 days levofloxacin treatment, before a laparoscopic resection of the kidney stone is performed. The analysis reveals a struvite lithiasis with a disorganized radial-section nuclear structure (type IVc).

  5. Apron (no more dirty egg: (representations

    Directory of Open Access Journals (Sweden)

    Tânia Regina Oliveira Ramos

    2013-09-01

    Full Text Available The title, in its ambiguity, comes from a song in tribute to mothers, “Mommy, Mommy. I remember slipper in hand, all of the apron dirty egg,” The purpose of this essay is to show contemporary narratives that seek to represent by the writting the sense of passion of the modern urban woman, her experiences of morality, what is left of what was called archetypally respectability and domestic responsibility.

  6. Protein profiles of hatchery egg shell membrane.

    Science.gov (United States)

    Rath, N C; Liyanage, R; Makkar, S K; Lay, J O

    2016-01-01

    Eggshells which consist largely of calcareous outer shell and shell membranes, constitute a significant part of poultry hatchery waste. The shell membranes (ESM) not only contain proteins that originate from egg whites but also from the developing embryos and different contaminants of microbial and environmental origins. As feed supplements, during post hatch growth, the hatchery egg shell membranes (HESM) have shown potential for imparting resistance of chickens to endotoxin stress and exert positive health effects. Considering that these effects are mediated by the bioactive proteins and peptides present in the membrane, the objective of the study was to identify the protein profiles of hatchery eggshell membranes (HESM). Hatchery egg shell membranes were extracted with acidified methanol and a guanidine hydrochloride buffer then subjected to reduction/alkylation, and trypsin digestion. The methanol extract was additionally analyzed by matrix assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF-MS). The tryptic digests were analyzed by liquid chromatography and tandem mass spectrometry (LC-MS-MS) to identify the proteins. Our results showed the presence of several proteins that are inherent and abundant in egg white such as, ovalbumin, ovotransferrin, ovocleidin-116, and lysozyme, and several proteins associated with cytoskeletal, cell signaling, antimicrobial, and catalytic functions involving carbohydrate, nucleic acid, and protein metabolisms. There were some blood derived proteins most likely originating from the embryos and several other proteins identified with different aerobic, anaerobic, gram positive, gram negative, soil, and marine bacterial species some commensals and others zoonotic. The variety of bioactive proteins, particularly the cell signaling and enzymatic proteins along with the diverse microbial proteins, make the HESM suitable for nutritional and biological application to improve post hatch immunity of poultry.

  7. Coriolis Force

    Science.gov (United States)

    Marciuc, Daly; Solschi, Viorel

    2017-04-01

    Understanding the Coriolis effect is essential for explaining the movement of air masses and ocean currents. The lesson we propose aims to familiarize students with the manifestation of the Coriolis effect. Students are guided to build, using the GeoGebra software, a simulation of the motion of a body, related to a rotating reference system. The mathematical expression of the Coriolis force is deduced, for particular cases, and the Foucault's pendulum is presented and explained. Students have the opportunity to deepen the subject, by developing materials related to topics such as: • Global Wind Pattern • Ocean Currents • Coriolis Effect in Long Range Shooting • Finding the latitude with a Foucault Pendulum

  8. Joining Forces

    DEFF Research Database (Denmark)

    Christiansen, Anne Mette

    2013-01-01

    The interest in Corporate Social Responsibility (CSR) has grown dramatically over the last three years in Greenland. A vast geographical area with a tiny population, Greenland has recently obtained self-government status and is going through a rapid development economically and socially...... as the country moves towards embracing extractive industries (oil, gas and mining) as a path to development. Both government, civil society and business are increasingly looking for new and innovative ways of joining forces across sectors to solve some of the country's many critical social issues. Greenlandic...... companies have over the last 23 years embraced the concept of strategic CSR and are increasingly engaging in cross-sector partnerships as part of their CSR strategy. The partnerships take different forms both in regards to number of partners, focus areas and level of strategic engagement. In the article...

  9. Effect of Canola Oil and Vitamin A on Egg Characteristics and Egg Cholesterol in Laying Hens During Hot Summer Months

    Directory of Open Access Journals (Sweden)

    S Ahmad*1, Ahsan-ul-Haq2, M Yousaf2, Z Kamran1, Ata-ur-Rehman3, MU Suhail1 and HA Samad1

    2013-07-01

    Full Text Available Canola oil and vitamin A were evaluated for their effects on egg characteristics, egg cholesterol and egg triglycerides (TG in laying hens prone to heat-stress during summer months. Four levels of canola oil (0, 2, 3 and 4% of diet in combination with two levels of vitamin A (3,000 or 10,000 IU/kg of diet were fed to laying hens for a period of 12 weeks. Various egg-quality parameters were measured on weekly basis while, serum TG, egg cholesterol and TG contents were analyzed during the last week of the trial. The results of the study showed that the egg weight, egg mass, yolk weight, Haugh unit score, shell thickness, shell weight and egg breaking-strength were similar (P>0.05 for all canola oil levels supplemented to the laying hens. Higher egg weight and egg mass (P0.05 by increasing canola oil or vitamin A levels in the diet of laying hens. It might be concluded from the results of the present study that canola oil as a source of omega-3 fatty acids can be included in the diet of laying hens without compromising the quality characteristics of the eggs.

  10. Physical and Chemical Characteristics of Maleo Egg in Bogani Nani Wartabone Park

    OpenAIRE

    Saerang, JLP; Manalu, W; Soesanto, IRH; Mardiastuti, A

    2010-01-01

    The objective of this study was to examine the size (weight, length, and width) of Maleo egg in Bogani Nani Wartabone National Park.Physical characteristics that measure are : egg weight, egg shell, egg index , yolk, and albumen. Physical characteristics measured were: egg weight, egg shell thickness, egg index, yolk, and albumen. Two fresh eggs were weighed to the electric ohause balance with 400 g the scale 0.01. Two fresh egg were weighed with an electric balance. Length and width off egg ...

  11. Unscrambling Egg Allergy: The Diagnostic Value of Specific IgE Concentrations and Skin Prick Tests for Ovomucoid and Egg White in the Management of Children with Hen’s Egg Allergy

    OpenAIRE

    Marriage, D. E.; Erlewyn-Lajeunesse, M.; Unsworth, D. J.; Henderson, A. J.

    2012-01-01

    Resolution of egg allergy occurs in the majority of egg allergic children. Positive specific IgE antibodies to ovomucoid (OVM) have been suggested to be of greater predictive value for persistent egg allergy than specific IgE to egg white. The performance of OVM-specific IgE antibody levels in a cohort of children referred for a routine egg challenge was compared with egg white specific IgE levels in predicting a positive egg challenge. 24/47 subjects had persistent egg allergy. Receiver oper...

  12. Effect of Resin Cement Mixing Method on the Retention Strength of a CAD/CAM Zirconia Crowns.

    Science.gov (United States)

    Sadighpour, Leyla; Fazel, Akbar; Geramipanah, Farideh; Allahdadi, Mahdi

    2014-12-01

    Several treatments have been suggested to improve the retention of zirconia-based restorations luted with different cements. Resin cements are believed to improve crown retention under certain circumstances. The aim of the present study was to examine the effect of three cements with different mixing methods on the retention of CAD/CAM zirconia crowns. Thirty extracted human molars were randomly divided into three groups and prepared for all-ceramic crowns (6° taper, 4-mm height and a 1.2 mm rounded shoulder finish line). A zirconia crown (Tizian CAD/CAM) was fabricated for each tooth. The crowns were air-abraded using airborne particles, adjusted, and cemented to the corresponding tooth with one of the following cements: Panavia F2 (PAN group), RelyX Unicem (UNH group) or RelyX Unicem Aplicap (UNA group). After 3,000 rounds of thermal cycling, retention was measured using a specific retentive jig and a universal testing machine. The retention strength was measured by dividing the retention force by the surface area of each tooth. The means of the pull-out test results for each group were compared using analysis of variance and Tukey's HSD test (α = 0.05). The mode of failure was examined using a stereomicroscope. The mean retention value was 6.45 (0.34) MPa for the UNA group, 4.99 MPa (0.47) for the UNH group, and 4.45 (0.39) for the PAN group; the differences among the three test groups were significant. A mixed failure was observed in 83.3 % of specimens, while no cohesive failure occurred in the crowns. Within the limitations of the present study, of the three tested cements, Relyx Unicem Aplicap cement was associated with the highest retention force for Tizian zirconia crowns.

  13. Green roofs'retention performances in different climates

    Science.gov (United States)

    Viola, Francesco; Hellies, Matteo; Deidda, Roberto

    2017-04-01

    The ongoing process of global urbanization contributes to increasing stormwater runoff from impervious surfaces, threatening also water quality. Green roofs have been proved to be an innovative stormwater management tool to partially restore natural state, enhancing interception, infiltration and evapotranspiration fluxes. The amount of water that is retained within green roofs depends mainly on both soil properties and climate. The evaluation of the retained water is not trivial since it depends on the stochastic soil moisture dynamics. The aim of this work is to explore performances of green roofs, in terms of water retention, as a function of their depth considering different climate regimes. The role of climate in driving water retention has been mainly represented by rainfall and potential evapotranspiration dynamics, which are simulated by a simple conceptual weather generator at daily time scale. The model is able to describe seasonal (in-phase and counter-phase) and stationary behaviors of climatic forcings. Model parameters have been estimated on more than 20,000 historical time series retrieved worldwide. Exemplifying cases are discussed for five different climate scenarios, changing the amplitude and/or the phase of daily mean rainfall and evapotranspiration forcings. The first scenario represents stationary climates, in two other cases the daily mean rainfall or the potential evapotranspiration evolve sinusoidally. In the latter two cases, we simulated the in-phase or in counter-phase conditions. Stochastic forcings have been then used as an input to a simple conceptual hydrological model which simulate soil moisture dynamics, evapotranspiration fluxes, runoff and leakage from soil pack at daily time scale. For several combinations of annual rainfall and potential evapotranspiration, the analysis allowed assessing green roofs' retaining capabilities, at annual time scale. Provided abacus allows a first approximation of possible hydrological benefits

  14. Retention and failure morphology of prefabricated posts

    DEFF Research Database (Denmark)

    Sahafi, Alireza; Peutzfeldt, Anne; Asmussen, Erik

    2004-01-01

    PURPOSE: This study evaluated the effect of cement, post material, surface treatment, and shape (1) on the retention of posts luted in the root canals of extracted human teeth and (2) on the failure morphology. MATERIALS AND METHODS: Posts of titanium alloy (ParaPost XH), glass fiber (Para...... at 37 degrees C for 7 days, retention was determined by extraction of the posts. Failure morphology of extracted posts was analyzed and quantified stereomicroscopically. RESULTS: Type of luting cement, post material, and shape of post influenced the retention and failure morphology of the posts. Because...

  15. A strategic approach to employee retention.

    Science.gov (United States)

    Gering, John; Conner, John

    2002-11-01

    A sound retention strategy should incorporate a business plan, a value proposition, progress measures, and management influences. The business plan will indicate whether a healthcare organization will achieve a return on investment for its effort. A value proposition will showcase an organization's strengths and differentiate it from its competitors. Measuring progress toward meeting retention goals at regular intervals will help keep an organization on track. The best managers require accountability, rewarding employees for their successes and taking corrective action as necessary. Retention rate targets must be at a level that will achieve a competitive advantage in the served market.

  16. Comparison of retention and strain energies of stud attachments for implant overdentures.

    Science.gov (United States)

    Petropoulos, Vicki C; Mante, Francis K

    2011-06-01

    The retentive forces and the strain energies absorbed during dislodging of implant overdenture stud attachments are useful parameters to consider in the selection of attachments. The purpose of this study was to compare the retentive forces and strain energies of the Nobel Biocare standard ball, Nobel Biocare newer generation ball (Yorba Linda, CA), Zest Anchor, Zest Anchor Advanced Generation (Escondido, CA), Sterngold-Implamed ERA white, and Sterngold-Implamed orange attachments (Attleboro, MA) on an implant-retained in vitro overdenture model. The attachments were tested using two permanently placed Brånemark system implants on a test model attached to an Instron machine. Each attachment had one part embedded in a denture-like housing, and the other part screwed into the implants. Dislodging tensile forces were applied to the housings in two directions simulating function: vertical and oblique. Eight tests were done in two directions with six specimens of each attachment. Retentive forces generated and strain energies absorbed during displacement were determined. A 1-way ANOVA followed by the Tukey studentized range test was used to determine groups that were significantly different at the p vertical and oblique forces [37.2 (5.5) N and 25.9 (3.2) N, respectively]. The Zest Anchor had the lowest vertical force [10.8 (4.2) N], and Nobel Biocare Standard had the lowest oblique retentive force [10.6 (3.0) N]. The Nobel Biocare Standard Ball attachment had the highest strain energies [29.7 × 10(-3) (11.9 × 10(-3)) J, 30.3 × 10(-3) (14.3 × 10(-3)) J, respectively, in the vertical and oblique directions]. The Sterngold-Implamed ERA White and Zest Anchor had the lowest strain energies [5.3 × 10(-3) (3.2 × 10(-3)) J and 4.5 × 10(-3) (1.1 × 10(-3)) J, respectively, in the vertical and oblique directions]. The retentive forces and strain energies of implant overdenture stud attachments are different and should be considered during prosthesis selection. © 2011 by

  17. Transparent and flexible write-once-read-many (WORM) memory device based on egg albumen

    Science.gov (United States)

    Qu, Bo; Lin, Qianru; Wan, Tao; Du, Haiwei; Chen, Nan; Lin, Xi; Chu, Dewei

    2017-08-01

    Egg albumen, as an important protein resource in nature, is an interesting dielectric material exhibiting many fascinating properties for the development of environmentally friendly electronic devices. Taking advantage of their extraordinary transparency and flexibility, this paper presents an innovative preparation approach for albumen thin film based write-once-read-many-times (WORM) memory devices in a simple, cost-effective manner. The fabricated device shows superior data retention properties including non-volatile character (over 105 s) and promising great read durability (106 times). Furthermore, our results suggested that the electric-field-induced trap-controlled space charge limited current (SCLC) conduction is responsible for the observed resistance switching effect. The present study may likely reveal another pathway towards complete see-through electrical devices.

  18. Transparent and flexible write-once-read-many (WORM) memory device based on egg albumen

    International Nuclear Information System (INIS)

    Qu, Bo; Lin, Qianru; Wan, Tao; Du, Haiwei; Chen, Nan; Lin, Xi; Chu, Dewei

    2017-01-01

    Egg albumen, as an important protein resource in nature, is an interesting dielectric material exhibiting many fascinating properties for the development of environmentally friendly electronic devices. Taking advantage of their extraordinary transparency and flexibility, this paper presents an innovative preparation approach for albumen thin film based write-once-read-many-times (WORM) memory devices in a simple, cost-effective manner. The fabricated device shows superior data retention properties including non-volatile character (over 10 5 s) and promising great read durability (10 6 times). Furthermore, our results suggested that the electric-field-induced trap-controlled space charge limited current (SCLC) conduction is responsible for the observed resistance switching effect. The present study may likely reveal another pathway towards complete see-through electrical devices. (paper)

  19. A brood parasite selects for its own egg traits.

    Science.gov (United States)

    Spottiswoode, Claire N

    2013-10-23

    Many brood parasitic birds lay eggs that mimic their hosts' eggs in appearance. This typically arises from selection from discriminating hosts that reject eggs which differ from their own. However, selection on parasitic eggs may also arise from parasites themselves, because it should pay a laying parasitic female to detect and destroy another parasitic egg previously laid in the same host nest by a different female. In this study, I experimentally test the source of selection on greater honeyguide (Indicator indicator) egg size and shape, which is correlated with that of its several host species, all of which breed in dark holes. Its commonest host species did not discriminate against experimental eggs that differed from their own in size and shape, but laying female honeyguides preferentially punctured experimental eggs more than host or control eggs. This should improve offspring survival given that multiple parasitism by this species is common, and that honeyguide chicks kill all other nest occupants. Hence, selection on egg size in greater honeyguides parasitizing bee-eaters appears to be imposed not by host defences but by interference competition among parasites themselves.

  20. Reducing Risk of Salmonellosis through Egg Decontamination Processes.

    Science.gov (United States)

    Keerthirathne, Thilini Piushani; Ross, Kirstin; Fallowfield, Howard; Whiley, Harriet

    2017-03-22

    Eggs have a high nutritional value and are an important ingredient in many food products. Worldwide foodborne illnesses, such as salmonellosis linked to the consumption of eggs and raw egg products, are a major public health concern. This review focuses on previous studies that have investigated the procedures for the production of microbiologically safe eggs. Studies exploring pasteurization and decontamination methods were investigated. Gamma irradiation, freeze drying, hot air, hot water, infra-red, atmospheric steam, microwave heating and radiofrequency heating are all different decontamination methods currently considered for the production of microbiologically safe eggs. However, each decontamination procedure has different effects on the properties and constituents of the egg. The pasteurization processes are the most widely used and best understood; however, they influence the coagulation, foaming and emulsifying properties of the egg. Future studies are needed to explore combinations of different decontamination methods to produce safe eggs without impacting the protein structure and usability. Currently, eggs which have undergone decontamination processes are primarily used in food prepared for vulnerable populations. However, the development of a decontamination method that does not affect egg properties and functionality could be used in food prepared for the general population to provide greater public health protection.

  1. Effects of Disinfectants on Larval Development of Ascaris suum Eggs.

    Science.gov (United States)

    Oh, Ki-Seok; Kim, Geon-Tae; Ahn, Kyu-Sung; Shin, Sung-Shik

    2016-02-01

    The objective of this study was to evaluate the effects of several different commercial disinfectants on the embryogenic development of Ascaris suum eggs. A 1-ml aliquot of each disinfectant was mixed with approximately 40,000 decorticated or intact A. suum eggs in sterile tubes. After each treatment time (at 0.5, 1, 5, 10, 30, and 60 min), disinfectants were washed away, and egg suspensions were incubated at 25˚C in distilled water for development of larvae inside. At 3 weeks of incubation after exposure, ethanol, methanol, and chlorohexidin treatments did not affect the larval development of A. suum eggs, regardless of their concentration and treatment time. Among disinfectants tested in this study, 3% cresol, 0.2% sodium hypochlorite and 0.02% sodium hypochlorite delayed but not inactivated the embryonation of decorticated eggs at 3 weeks of incubation, because at 6 weeks of incubation, undeveloped eggs completed embryonation regardless of exposure time, except for 10% povidone iodine. When the albumin layer of A. suum eggs remained intact, however, even the 10% povidone iodine solution took at least 5 min to reasonably inactivate most eggs, but never completely kill them with even 60 min of exposure. This study demonstrated that the treatment of A. suum eggs with many commercially available disinfectants does not affect the embryonation. Although some disinfectants may delay or stop the embryonation of A. suum eggs, they can hardly kill them completely.

  2. Ensuring Microbiological Safety of Fresh Eggs by Using Gamma Irradiation

    International Nuclear Information System (INIS)

    Hammad, A. A.; Swailam, H.M.; Aly, W. F.

    2008-01-01

    Egg shell sanitizing practices are necessary to improve microbiological safety of fresh eggs. In this work, fifteen fresh eggs samples of each (Balady, White and Brown eggs) were collected from different local supermarkets to evaluate their microbiological quality. The results indicated that Balady eggs were higher in microbial population in comparison with the two other varieties. Salmonella spp. was detected in 9 (60%) samples of Balady eggs. The effect of gamma irradiation at dose of 0, 2, 3 and 4 kGy on microbiological quality of Balady eggs during storage at 4±1 degree C for 35 days was studied. The effects of irradiation and storage on total cholesterol, and total carotenoids contents in Balady eggs were also investigated. The results showed that irradiation at 3 kGy reduced total aerobic bacterial counts. Coliform bacteria, E. coli and Salmonella spp. were completely eliminated. Total cholesterol and total carotenoids were decreased in yolk egg as a result of irradiation. Treated Balady eggs with irradiation dose of 3 kGy were efficient and sufficient for ensuring safety, maintain quality and extend shelf-life.

  3. Identification of double-yolked duck egg using computer vision.

    Directory of Open Access Journals (Sweden)

    Long Ma

    Full Text Available The double-yolked (DY egg is quite popular in some Asian countries because it is considered as a sign of good luck, however, the double yolk is one of the reasons why these eggs fail to hatch. The usage of automatic methods for identifying DY eggs can increase the efficiency in the poultry industry by decreasing egg loss during incubation or improving sale proceeds. In this study, two methods for DY duck egg identification were developed by using computer vision technology. Transmittance images of DY and single-yolked (SY duck eggs were acquired by a CCD camera to identify them according to their shape features. The Fisher's linear discriminant (FLD model equipped with a set of normalized Fourier descriptors (NFDs extracted from the acquired images and the convolutional neural network (CNN model using primary preprocessed images were built to recognize duck egg yolk types. The classification accuracies of the FLD model for SY and DY eggs were 100% and 93.2% respectively, while the classification accuracies of the CNN model for SY and DY eggs were 98% and 98.8% respectively. The CNN-based algorithm took about 0.12 s to recognize one sample image, which was slightly faster than the FLD-based (about 0.20 s. Finally, this work compared two classification methods and provided the better method for DY egg identification.

  4. Comparative proteome analysis of egg yolk plasma proteins during storage.

    Science.gov (United States)

    Gao, Dan; Qiu, Ning; Liu, Yaping; Ma, Meihu

    2017-06-01

    Physical changes such as chicken egg white thinning and egg yolk flattening occur during storage, implying a decline in egg quality. To reveal the deteriorative process related to chicken egg internal quality, a comparative proteomic method was used in this study to analyze the alterations in egg yolk plasma proteins at different storage times (0, 20 and 40 days) under an ambient temperature of 22 ± 2 °C. Using two-dimensional electrophoresis followed by matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry, 33 protein spots representing 12 proteins were identified with significant (P albumin, vitellogenin fragments, IgY chains, ovalbumin, ovoinhibitor, α 2 -macroglobulin-like protein 1-like, hemopexin, transthyretin, apolipoprotein A-I and β 2 -glycoprotein I precursor. Accelerating degradation for most egg yolk plasma proteins was observed after prolonged storage (from day 20 to day 40). It is likely that the increased degradation of protease inhibitors such as ovoinhibitor and α 2 -macroglobulin-like protein 1-like during prolonged storage lead to an imbalance of protease and antiprotease in egg yolk, which may play a key role in the degradation of egg yolk proteins. These findings will provide an insight into the effects of storage on egg yolk protein changes and give a deeper understanding of the deteriorative process of chicken egg yolk. © 2016 Society of Chemical Industry. © 2016 Society of Chemical Industry.

  5. Skate Bathyraja spp. egg predation in the eastern Bering Sea.

    Science.gov (United States)

    Hoff, G R

    2009-01-01

    Predation on skate eggs by snails was examined for three skate species at seven nursery sites in three regions (north, middle and south) of the eastern Bering Sea. Mean predation levels were 6.46% for the Alaska skate Bathyraja parmifera, 2.65% for the Aleutian skate Bathyraja aleutica and 22.25% for the Bering skate Bathyraja interrupta. Predation levels were significantly higher at the middle and north sites than the south sites for all species combined. Predation levels decreased with increasing egg-case densities at all nursery sites, and the highest predation levels occurred where egg-case densities were very low. Predated egg-case density increased with increasing snail densities across all nursery sites examined. The Oregon triton Fusitriton oregonensis was the most abundant snail species at all nursery sites and displayed ability to drill holes in the egg case of B. parmifera. Holes left by predatory snails in egg cases of B. parmifera were significantly larger, and of different shape at the middle site compared to the south site. Holes in B. parmifera were also significantly larger than those in egg cases of B. interrupta across all sites examined. Egg cases of B. aleutica possess surface spines that cover the egg case and may inhibit predation by snails at a greater rate than that of the B. parmifera and B. interrupta, which have a smoother egg-case surface.

  6. Physicochemical and microscopic characterization of dehydrated ostrich eggs

    Directory of Open Access Journals (Sweden)

    Jailane de Souza Aquino

    2014-09-01

    Full Text Available Approximately 20% of ostrich eggs are infertile and can be consumed by humans, however, its high volume and perishability indicate the need of appropriate technological processes. Thus, this study aimed to determine the chemical composition of in natura ostrich eggs, as well as physical, chemical and microscopic parameters of ostrich egg products after dehydration. The chemical composition of in natura ostrich and chicken eggs was determined. Ostrich egg whites, yolks and whole eggs were fermented and dried in mini spray-dryer. After dehydration, yield, composition and particle diameter of egg products collected in the cyclone and spray-dryer chamber were evaluated. In natura ostrich egg white and yolk showed higher protein (respectively 15.21% and 11.54% and fat (respectively 38.48% and 0.34% contents, when compared to chicken eggs. Samples collected from the cyclone showed a lower moisture content and better particle diameter uniformity. The ostrich egg products presented satisfactory yield, uniformity and nutritional value, demonstrating that the spray-dryer technique is another alternative for conservation and use of this food for human consumption.

  7. Impacts of radiation processing on physicochemical properties of Table Eggs

    International Nuclear Information System (INIS)

    Farag, M. D. H.; Abdul Azeem, A. M.

    2012-12-01

    This study investigated the effect of gamma irradiation on pathogens, quality, and functional properties of shell eggs. Using intact, fresh while and brown shell eggs, inoculated with 10 9 colony-forming units (cfu) of S enteritidis and S, typhimurium. The effect of gamma-irradiation at doses 2,4 and 6 kGy of gamma irradiation on bacteriologic and population and physical characteristics (Haugh units and yolk color), chemical composition (moisture, crude protein, crude fat and ash), the rheological changes (viscosity), pH and protean solubility of the eggs were determinate d. Results showed that 2 kGy, the number of S, enteritidis and eggs internal quality as freshness as measured by albumen height and the number of hugh units, and yolk color index were all significantly reduced with increasing irradiation doses. On significant change was found after irradiation in egg white or yolk in the chemical composition (moisture, crude protein, crude fat and ash). After irradiation, the foaming ability and foam capacity of egg white were increasing radiation doses> The viscosity of egg white and yolk decreased with increasing doses of irradiation. The pH of the egg white and yolk increasing doses of radiation dose. The protein salability decreased significantly in egg white and yolk with increasing radiation dose. These Results Suggest that gamma irradiation reduce the freshness of shell eggs and improving important functional properties such as to foaming ability and foaming capacity. Gamma irradiation can also be applied to the egg breaking process sine irradiation reduces the viscosity of egg white and yolk, which can allow egg whites and yolks to be separated with greater efficiency. (Author)

  8. Reciprocal crosses between Alabio and Mojosari ducks : early egg production

    Directory of Open Access Journals (Sweden)

    L.H Prasetyo

    2000-12-01

    Full Text Available alternative to increasing productivity and production efficiency. Crossbreeding has been used widely for increasing productivity, and in this experiment Alabio and Mojosari ducks were crossed reciprocally in order to evaluate their egg production and egg quality, when compared to their parental breeds. Four genotypes AA, AM, MA and MM were compared and each consisted of 50 layer ducks. Each animal was kept in individual cage, and individual egg production and egg quality were recorded. They were given layer feed containing 20% crude protein and 3000 kcal/kg metabolisable energy. Results showed that the crossbred ducks (AM and MA laid eggs earlier than their parental breeds (AA and MM, and MA laid earlier than AM. The weight of first eggs of the crossbreeds did not differ significantly, AM was the same as MM and MA the same as AA. For the body weight at first lay, MA and AM weighed in between their parental breeds, AA was the heaviest and then followed by MA, AM and MM. For the 3-month egg production, MA ducks laid significantly more egg than the other 3 genotypes, and this is related to the age of first lay being the earliest. In terms of egg quality such as egg weight, yolk color, weight and thickness of shell, weight of the white and HU value, the crossbred ducks showed quality in between AA and MM. The AM ducks tended to be closer to MM and MA closer to AA, and this shows a strong influence of maternal effects. The average level of heterosis for weight of first egg is 2.41% and for 3-month egg production is 2.1%, but for MA cross the heterosis level is 11.69% for egg production. The overall results showed that crossbreeds between Alabio and Mojosari have the potential in improving production traits in the effort to increase productivity and production efficiency.

  9. Comparative analysis of structure and strength of vitelline membrane and physical parameters of yolk of ostrich, emu, and greater rhea eggs.

    Science.gov (United States)

    Damaziak, K; Marzec, A; Kieliszek, M; Buclaw, M; Michalczuk, M; Niemiec, J

    2018-03-01

    In this study, we analyzed selected morphological traits of eggs, as well as structure, strength, and protein composition of the vitelline membrane (VM) of ostrich, emu, and greater rhea eggs. Ninety eggs (30 for species) were analyzed for the following parameters: egg weight, yolk weight, yolk ratio, and yolk index. In addition, pH value, water activity, consistency index, and flow behavior index were determined. The strength of VM was measured using the TA.HDPlus Texture Analyzer. Micrograph images were taken via a scanning electron microscope. Polyacrylamide gel electrophoresis was conducted under denaturing conditions. Ostrich eggs were characterized by the highest egg and yolk weight compared with those of emu and greater rhea eggs, whereas emu eggs had the highest yolk ratio compared with those of ostrich and greater rhea eggs (P > 0.05). Yolk content differed among the species in terms of water activity; it was found to be higher in emu eggs than in ostrich and greater rhea eggs (P > 0.05). Based on flow curves, yolks of the ratites were classified as pseudoplastic non-Newtonian fluids. The consistency index was significantly higher in yolks of ostrich and emu than that of greater rhea eggs, whereas the VM of yolks of greater rhea eggs was the most resistant (had the highest breaking force = 26.4 g). All species differed significantly regarding the structure of VM, the outer layer (OL) in particular, which was found to constitute fibers of various thicknesses that were differently arranged. Fibers of the OL of the VM of emu, whose fibers were the least differentiated but formed the most compact network, were the most diverse in characterization. An electropherogram of the VM of ostrich revealed 11 primary protein bands: 6 for the OL and 5 for the inner layer (IL), that of emu revealed 9 bands: 5 for the OL and 4 for the IL, and that of greater rhea revealed 10 bands: 6 for the OL and 4 for the IL.

  10. Closer clutch inspection—quicker egg ejection: timing of host responses toward parasitic eggs

    Czech Academy of Sciences Publication Activity Database

    Požgayová, Milica; Procházka, Petr; Polačiková, Lenka; Honza, Marcel

    2011-01-01

    Roč. 22, č. 1 (2011), s. 46-51 ISSN 1045-2249 R&D Projects: GA AV ČR IAA600930605; GA AV ČR IAA600930903; GA ČR(CZ) GD524/05/H536; GA MŠk LC06073 Institutional research plan: CEZ:AV0Z60930519 Keywords : Acrocephalus arundinaceus * brood parasitism * egg discrimination * egg ejection time * great reed warbler * nest inspection Subject RIV: EG - Zoology Impact factor: 3.083, year: 2011

  11. Strategies to improve retention in randomised trials.

    Science.gov (United States)

    Brueton, Valerie C; Tierney, Jayne; Stenning, Sally; Harding, Seeromanie; Meredith, Sarah; Nazareth, Irwin; Rait, Greta

    2013-12-03

    Loss to follow-up from randomised trials can introduce bias and reduce study power, affecting the generalisability, validity and reliability of results. Many strategies are used to reduce loss to follow-up and improve retention but few have been formally evaluated. To quantify the effect of strategies to improve retention on the proportion of participants retained in randomised trials and to investigate if the effect varied by trial strategy and trial setting. We searched the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, PreMEDLINE, EMBASE, PsycINFO, DARE, CINAHL, Campbell Collaboration's Social, Psychological, Educational and Criminological Trials Register, and ERIC. We handsearched conference proceedings and publication reference lists for eligible retention trials. We also surveyed all UK Clinical Trials Units to identify further studies. We included eligible retention trials of randomised or quasi-randomised evaluations of strategies to increase retention that were embedded in 'host' randomised trials from all disease areas and healthcare settings. We excluded studies aiming to increase treatment compliance. We contacted authors to supplement or confirm data that we had extracted. For retention trials, we recorded data on the method of randomisation, type of strategy evaluated, comparator, primary outcome, planned sample size, numbers randomised and numbers retained. We used risk ratios (RR) to evaluate the effectiveness of the addition of strategies to improve retention. We assessed heterogeneity between trials using the Chi(2) and I(2) statistics. For main trials that hosted retention trials, we extracted data on disease area, intervention, population, healthcare setting, sequence generation and allocation concealment. We identified 38 eligible retention trials. Included trials evaluated six broad types of strategies to improve retention. These were incentives, communication strategies, new questionnaire format, participant case

  12. International perspectives on retention and persistence

    Directory of Open Access Journals (Sweden)

    Gary Burkholder

    2014-06-01

    Full Text Available Access to higher education globally is increasing dramatically; attainment of tertiary degrees is a high priority, as educational attainment is associated with increased personal incomes as well as growth of the middle class in developing countries. The purpose of this essay is to briefly examine retention and persistence issues from a global perspective, review some retention strategies that have been employed at schools outside the United States, and to identify several key factors that related to retention and persistence globally, including access, infrastructure, financial consideration, and readiness for tertiary education.  There exists an opportunity to utilize knowledge gained in the evolution of the higher education system in the United States to help address the problems associated with retention and persistence.   DOI: 10.18870/hlrc.v4i2.208

  13. Physiological and biochemical characterization of egg extract of black widow spiders to uncover molecular basis of egg toxicity

    Directory of Open Access Journals (Sweden)

    Yizhong Yan

    2014-01-01

    Full Text Available BACKGROUND: Black widow spider (L. tredecimguttatus has toxic components not only in the venomous glands, but also in other parts of the body and its eggs. It is biologically important to investigate the molecular basis of the egg toxicity. RESULTS: In the present work, an aqueous extract was prepared from the eggs of the spider and characterized using multiple physiological and biochemical strategies. Gel electrophoresis and mass spectrometry demonstrated that the eggs are rich in high-molecular-mass proteins and the peptides below 5 kDa. The lyophilized extract of the eggs had a protein content of 34.22% and was shown to have a strong toxicity towards mammals and insects. When applied at a concentration of 0.25 mg/mL, the extract could completely block the neuromuscular transmission in mouse isolated phrenic nerve-hemidiaphragm preparations within 12.0 ± 1.5 min. Using whole-cell patch-clamp technique, the egg extract was demonstrated to be able to inhibit the voltage-activated Na+, K+and Ca2+ currents in rat DRG neurons. In addition, the extract displayed activities of multiple hydrolases. Finally, the molecular basis of the egg toxicity was discussed. CONCLUSIONS: The eggs of black widow spiders are rich in proteinous compounds particularly the high-molecular-mass proteins with different types of biological activity The neurotoxic and other active compounds in the eggs are believed to play important roles in the eggs' toxic actions.

  14. Physiological and biochemical characterization of egg extract of black widow spiders to uncover molecular basis of egg toxicity.

    Science.gov (United States)

    Yan, Yizhong; Li, Jianjun; Zhang, Yiya; Peng, Xiaozhen; Guo, Tianyao; Wang, Jirong; Hu, Weijun; Duan, Zhigui; Wang, Xianchun

    2014-05-16

    Black widow spider (L. tredecimguttatus) has toxic components not only in the venomous glands, but also in other parts of the body and its eggs. It is biologically important to investigate the molecular basis of the egg toxicity. In the present work, an aqueous extract was prepared from the eggs of the spider and characterized using multiple physiological and biochemical strategies. Gel electrophoresis and mass spectrometry demonstrated that the eggs are rich in high-molecular-mass proteins and the peptides below 5 kDa. The lyophilized extract of the eggs had a protein content of 34.22% and was shown to have a strong toxicity towards mammals and insects. When applied at a concentration of 0.25 mg/mL, the extract could completely block the neuromuscular transmission in mouse isolated phrenic nerve-hemidiaphragm preparations within 12.0 ± 1.5 min. Using whole-cell patch-clamp technique, the egg extract was demonstrated to be able to inhibit the voltage-activated Na+, K+ and Ca2+ currents in rat DRG neurons. In addition, the extract displayed activities of multiple hydrolases. Finally, the molecular basis of the egg toxicity was discussed. The eggs of black widow spiders are rich in proteinous compounds particularly the high-molecular-mass proteins with different types of biological activity The neurotoxic and other active compounds in the eggs are believed to play important roles in the eggs' toxic actions.

  15. Determinants of feedback retention in soccer players

    OpenAIRE

    Janu?rio, Nuno; Rosado, Ant?nio; Mesquita, Isabel; Gallego, Jos?; Aguilar-Parra, Jos? M.

    2016-01-01

    Abstract This study analyzed soccer players? retention of coaches? feedback during training sessions. We intended to determine if the retention of information was influenced by the athletes? personal characteristic (age, gender and the sports level), the quantity of information included in coach?s feedback (the number of ideas and redundancy), athletes? perception of the relevance of the feedback information and athletes? motivation as well as the attention level. The study that was conducted...

  16. Investigating Navy Officer Retention Using Data Farming

    Science.gov (United States)

    2015-09-01

    OFFICER RETENTION USING DATA FARMING by Aurel N. DeHollan September 2015 Thesis Advisor: Samuel E. Buttrey Second Reader: Thomas W...COVERED Master’s thesis 4. TITLE AND SUBTITLE INVESTIGATING NAVY OFFICER RETENTION USING DATA FARMING 5. FUNDING NUMBERS 6. AUTHOR(S) DeHollan...historical loss rates. The application of data farming to this model allows for investigation of different scenarios that can provide insight into both

  17. Predation on walleye eggs by fish on reefs in western Lake Erie

    Science.gov (United States)

    Roseman, E.F.; Taylor, W.W.; Hayes, D.B.; Jones, A.L.; Francis, J.T.

    2006-01-01

    We examined diets of fishes from gillnet and egg pump collections conducted on reefs in western Lake Erie during walleye (Sander vitreus) egg incubation periods from 1994–1999 and 2004 to assess incidence of walleye eggs in fish diets. We collected no potential egg predators in samples taken in 1994 but from 1995–1999 and in 2004 we caught 22 different species of fish on reefs in addition to spawning walleye. In most years, white perch (Morone americana) stomachs contained more walleye eggs than any other species on the reefs averaging 253 eggs per stomach. We also found lower numbers of walleye eggs in the stomachs of channel catfish (Ictalurus punctatus; 53 eggs/stomach), johnny darter (Etheostoma nigrum; 2 eggs/stomach), logperch (Percina caprodes; 10 eggs/stomach), quillback (Carpiodes cyprinus; 184 eggs/stomach), rock bass (Ambloplites rupestris; 3 eggs/stomach), round goby (Neogobius melanostomus; 4 eggs/stomach), sculpin (Cottidae; 21 eggs/stomach), silver chub (Macrhybopsis storeriana; 3 eggs/stomach), spottail shiner (Notropis hudsonius; 14 eggs/stomach), trout-perch (Percopsis omiscomaycus; 30 eggs/stomach), white sucker (Catastomus commersonii; 20 eggs/stomach), and yellow perch (Perca flavescens; 181 eggs/stomach). Similar to other studies of predation on walleye eggs, our results indicate that prolonged incubation periods increase the potential for egg loss due to predation.

  18. Resting eggs in free living marine and estuarine copepods

    DEFF Research Database (Denmark)

    Holm, Mark Wejlemann; Kiørboe, Thomas; Brun, Philipp Georg

    2018-01-01

    for 42 species of marine free living copepods. Resting eggs are reported in areas with high seasonal variation in sea surface temperature (median range 11°C). Temporal variation in chlorophyll a concentrations, however, seems of less importance. Resting eggs are commonly produced to cope with both warm......Marine free living copepods can survive harsh periods and cope with seasonal fluctuations in environmental conditions using resting eggs (embryonic dormancy). Laboratory experiments show that temperature is the common driver for resting egg production. Hence, we hypothesize (i) that seasonal...... temperature variation, rather than variation in food abundance is the main driver for the occurrence of the resting eggs strategy in marine and estuarine copepod species; and (ii) that the thermal boundaries of the distribution determine where resting eggs are produced and whether they are produced to cope...

  19. Temperature effects on copepod egg hatching: does acclimatization matter?

    DEFF Research Database (Denmark)

    Hansen, Benni Winding; Drillet, Guillaume; Kozmér, A.

    2010-01-01

    This report investigates female sizes, egg sizes and egg hatching rates in relation to temperature for the near-shore calanoid copepod Acartia tonsa cultured at 6, 9, 14 and 24°C for several generations to achieve acclimatization. Inverse size relationships of eggs and females were revealed...... rate, but a higher final hatching success at 9 and 6°C compared with egg hatching from non-acclimatized copepods. Eggs develop significantly better at low temperatures when compared with females in culture. This adaptation suggests that the observed annual population fluctuations in, for example...... with increasing temperature. Eggs produced at 6°C were 85 ± 4 µm in diameter, but decreased to 80 ± 3 µm at 24°C. Female cephalothorax length was 840 ± 52 and 692 ± 39 µm at 9 and 24°C, respectively. Parallel hatching experiments were performed between non-acclimatized and acclimatized cultures across a range...

  20. Comparison of fatty acid, cholesterol, vitamin A and E composition, and trans fats in eggs from brown and white egg strains that were molted or nonmolted.

    Science.gov (United States)

    Anderson, Kenneth E

    2013-12-01

    The impact of egg color, hen strain, and molting on the nutritional composition of eggs is limited. Therefore, this study compared nutritional composition and component percentages of cage-produced shell eggs with respect to egg color, hen strain, and molt. Four strains were selected from the North Carolina Layer Performance and Management Test: Hy-Line Brown (HB) and Bovans Brown (BB), and Hy-Line W-36 (HW) and Bovans White (BovW) were selected. Two groups from each strain were selected and 2 groups of molted HW and BovW were selected and compared with their nonmolted counterparts to examine the molt's impact. Two sets of eggs from each replicate were collected simultaneously at 101 wk of age. One sample of eggs was broken into a 12-egg pool stomached for 3 min (n = 12 samples), then divided into six 50-mL tubes, sealed, and frozen to be sent for cholesterol, n-3 fatty acids, saturated fat, monounsaturated fats, polyunsaturated fats, β-carotene, vitamin A, and vitamin E analyses. The other set of 12 eggs was then assessed for component percentages. The HW eggs had a greater (P eggs of 28.12 versus 27.00%, respectively; however, the BovW eggs had 1.0% more albumen. The HB and BB egg components were not different. Brown eggs were heavier (P eggs. White eggs had greater (P eggs had greater (P eggs from molted hens had a greater (P eggs by 0.70% than brown eggs due to increased saturated and polyunsaturated fats. The molting of hens reduced (P egg. Vitamin A levels were higher (P eggs, and vitamin E was higher (P eggs. Strain and molt appear to influence nutrient composition and component percentages in eggs produced from laying hens.