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Sample records for warfare agent percutaneous

  1. Evaluation of Chemical Warfare Agent Percutaneous Vapor Toxicity: Derivation of Toxicity Guidelines for Assessing Chemical Protective Ensembles.

    Energy Technology Data Exchange (ETDEWEB)

    Watson, A.P.

    2003-07-24

    Percutaneous vapor toxicity guidelines are provided for assessment and selection of chemical protective ensembles (CPEs) to be used by civilian and military first responders operating in a chemical warfare agent vapor environment. The agents evaluated include the G-series and VX nerve agents, the vesicant sulfur mustard (agent HD) and, to a lesser extent, the vesicant Lewisite (agent L). The focus of this evaluation is percutaneous vapor permeation of CPEs and the resulting skin absorption, as inhalation and ocular exposures are assumed to be largely eliminated through use of SCBA and full-face protective masks. Selection of appropriately protective CPE designs and materials incorporates a variety of test parameters to ensure operability, practicality, and adequacy. One aspect of adequacy assessment should be based on systems tests, which focus on effective protection of the most vulnerable body regions (e.g., the groin area), as identified in this analysis. The toxicity range of agent-specific cumulative exposures (Cts) derived in this analysis can be used as decision guidelines for CPE acceptance, in conjunction with weighting consideration towards more susceptible body regions. This toxicity range is bounded by the percutaneous vapor estimated minimal effect (EME{sub pv}) Ct (as the lower end) and the 1% population threshold effect (ECt{sub 01}) estimate. Assumptions of exposure duration used in CPE certification should consider that each agent-specific percutaneous vapor cumulative exposure Ct for a given endpoint is a constant for exposure durations between 30 min and 2 hours.

  2. Biological warfare agents.

    Science.gov (United States)

    Pohanka, Miroslav; Kuca, Kamil

    2010-01-01

    Biological warfare agents are a group of pathogens and toxins of biological origin that can be potentially misused for military or criminal purposes. The present review attempts to summarize necessary knowledge about biological warfare agents. The historical aspects, examples of applications of these agents such as anthrax letters, biological weapons impact, a summary of biological warfare agents and epidemiology of infections are described. The last section tries to estimate future trends in research on biological warfare agents.

  3. Biological warfare agents

    Directory of Open Access Journals (Sweden)

    Duraipandian Thavaselvam

    2010-01-01

    Full Text Available The recent bioterrorist attacks using anthrax spores have emphasized the need to detect and decontaminate critical facilities in the shortest possible time. There has been a remarkable progress in the detection, protection and decontamination of biological warfare agents as many instrumentation platforms and detection methodologies are developed and commissioned. Even then the threat of biological warfare agents and their use in bioterrorist attacks still remain a leading cause of global concern. Furthermore in the past decade there have been threats due to the emerging new diseases and also the re-emergence of old diseases and development of antimicrobial resistance and spread to new geographical regions. The preparedness against these agents need complete knowledge about the disease, better research and training facilities, diagnostic facilities and improved public health system. This review on the biological warfare agents will provide information on the biological warfare agents, their mode of transmission and spread and also the detection systems available to detect them. In addition the current information on the availability of commercially available and developing technologies against biological warfare agents has also been discussed. The risk that arise due to the use of these agents in warfare or bioterrorism related scenario can be mitigated with the availability of improved detection technologies.

  4. Biological Warfare Agents

    Directory of Open Access Journals (Sweden)

    Dev Vrat Kamboj

    2006-10-01

    Full Text Available There is a long historic record of use of biological warfare (BW agents by warring countriesagainst their enemies. However, the frequency of their use has increased since the beginningof the twentieth century. World war I witnessed the use of anthrax agent against human beingsand animals by Germans, followed by large-scale field trials by Japanese against war prisonersand Chinese population during world war II. Ironically, research and development in biologicalwarfare agents increased tremendously after the Geneva Protocol, signed in 1925, because ofits drawbacks which were overcome by Biological and Toxin Weapons Convention (BTWC in1972. Biological warfare programme took back seat after the 1972 convention but biologicalagents regained their importance after the bioterrorist attacks of anthrax powder in 2001. In thelight of these attacks, many of which turned out to be hoax, general awareness is required aboutbiological warfare agents that can be used against them. This review has been written highlightingimportant biological warfare agents, diseases caused by them, possible therapies and otherprotection measures.

  5. [Decontamination of chemical and biological warfare agents].

    Science.gov (United States)

    Seto, Yasuo

    2009-01-01

    Chemical and biological warfare agents (CBWA's) are diverse in nature; volatile acute low-molecular-weight toxic compounds, chemical warfare agents (CWA's, gaseous choking and blood agents, volatile nerve gases and blister agents, nonvolatile vomit agents and lacrymators), biological toxins (nonvolatile low-molecular-weight toxins, proteinous toxins) and microbes (bacteria, viruses, rickettsiae). In the consequence management against chemical and biological terrorism, speedy decontamination of victims, facilities and equipment is required for the minimization of the damage. In the present situation, washing victims and contaminated materials with large volumes of water is the basic way, and additionally hypochlorite salt solution is used for decomposition of CWA's. However, it still remains unsolved how to dispose large volumes of waste water, and the decontamination reagents have serious limitation of high toxicity, despoiling nature against the environments, long finishing time and non-durability in effective decontamination. Namely, the existing decontamination system is not effective, nonspecifically affecting the surrounding non-target materials. Therefore, it is the urgent matter to build up the usable decontamination system surpassing the present technologies. The symposiast presents the on-going joint project of research and development of the novel decontamination system against CBWA's, in the purpose of realizing nontoxic, fast, specific, effective and economical terrorism on-site decontamination. The projects consists of (1) establishment of the decontamination evaluation methods and verification of the existing technologies and adaptation of bacterial organophosphorus hydrolase, (2) development of adsorptive elimination technologies using molecular recognition tools, and (4) development of deactivation technologies using photocatalysis.

  6. Environmental chemistry of chemical warfare agents

    Energy Technology Data Exchange (ETDEWEB)

    MacNaughton, M.G.; Brewer, J.H.; Ledbetter-Ferrill, J. [Southwest Research Inst., San Antonio, TX (United States)

    1995-06-01

    This paper summarizes the approach used in the preparation of a Handbook for the Corps of Engineers, Huntsville Division, on the environmental chemistry of chemical warfare agents. The agents GB and HD will be used to illustrate the type of information in the report. Those readers interested in the full report should contact Mr. Arkie Fanning, Huntsville Corps of Engineers at (505) 955-5256. The U.S. Army Corps of Engineers (ACE) has identified approximately 7,200 formerly used defense sites (FUDS) in the United States, some of which are suspected to be contaminated with chemical warfare agents (CWA). The ACE has responsibility for environmental clean-up of FUDS, including site characterization, evaluation and remediation of the site. Thirty-four FUDS and 48 active DOD installations that may contain CWA were identified in an Interim Survey and Analysis Report by the USACMDA Program Manager for Non-Stockpile Chemical Material (NSCM). The chemical agents listed include sulfur mustard (H), lewisite (L), tabun (GA), sarin (GB), VX, hydrogen cyanide (AC), cyanogen chloride (CK), phosgene (CG), BZ, and CS.

  7. Chemical profiling of chemical warfare agents for forensic purposes

    NARCIS (Netherlands)

    Noort, D.; Reuver, L.P.J. de; Fidder, A.; Tromp, M.; Verschraagen, M.

    2010-01-01

    A program has been initiated towards the chemical profiling of chemical warfare agents, in order to support forensic investigations towards synthesis routes, production sites and suspect chemical suppliers. Within the first stage of the project various chemical warfare agents (VX, sulfur mustard, sa

  8. Chemical Warfare Agent Degradation and Decontamination

    Energy Technology Data Exchange (ETDEWEB)

    Talmage, Sylvia Smith [ORNL; Watson, Annetta Paule [ORNL; Hauschild, Veronique [U.S. Environmental Protection Agency; Munro, Nancy B [ORNL; King, J. [U.S. Army Environmental Center

    2007-02-01

    The decontamination of chemical warfare agents (CWA) from structures, environmental media, and even personnel has become an area of particular interest in recent years due to increased homeland security concerns. In addition to terrorist attacks, scenarios such as accidental releases of CWA from U.S. stockpile sites or from historic, buried munitions are also subjects for response planning. To facilitate rapid identification of practical and effective decontamination approaches, this paper reviews pathways of CWA degradation by natural means as well as those resulting from deliberately applied solutions and technologies; these pathways and technologies are compared and contrasted. We then review various technologies, both traditional and recent, with some emphasis on decontamination materials used for surfaces that are difficult to clean. Discussion is limited to the major threat CWA, namely sulfur mustard (HD, bis(2-chloroethyl)sulfide), VX (O-ethyl S-(2-diisopropylaminoethyl) methylphosphonothioate), and the G-series nerve agents. The principal G-agents are GA (tabun, ethyl N,N-dimethylphosphoramidocyanidate), GB (sarin, isopropyl methylphosphonofluoridate), and GD (soman, pinacolyl methylphosphonofluoridate). The chemical decontamination pathways of each agent are outlined, with some discussion of intermediate and final degradation product toxicity. In all cases, and regardless of the CWA degradation pathway chosen for decontamination, it will be necessary to collect and analyze pertinent environmental samples during the treatment phase to confirm attainment of clearance levels.

  9. Handbook of toxicology of chemical warfare agents

    CERN Document Server

    2010-01-01

    This groundbreaking book covers every aspect of deadly toxic chemicals used as weapons of mass destruction and employed in conflicts, warfare and terrorism. Including findings from experimental as well as clinical studies, this one-of-a-kind handbook is prepared in a very user- friendly format that can easily be followed by students, teachers and researchers, as well as lay people. Stand-alone chapters on individual chemicals and major topics allow the reader to easily access required information without searching through the entire book. This is the first book that offers in-depth coverage of individual toxicants, target organ toxicity, major incidents, toxic effects in humans, animals and wildlife, biosensors, biomarkers, on-site and laboratory analytical methods, decontamination and detoxification procedures, prophylactic, therapeutic and countermeasures, and the role of homeland security. Presents a comprehensive look at all aspects of chemical warfare toxicology in one reference work. This saves research...

  10. Reactivity of Dual-Use Decontaminants with Chemical Warfare Agents

    Science.gov (United States)

    2016-07-01

    decrease the logistical burden associated with transport and storage of decontaminants. The experiments in this study were focused on evaluating...propanediammonium dichloride, isopropanol, inert ingredients/water, hydrogen peroxide, diacetin Decontaminant formulated for chemical warfare agents F...potassium bisulfate, potassium sulfate, dipotassium peroxodisulfate, magnesium carbonate Acidic oxidative chemistry, used for VX laboratory waste

  11. Environmental assessments of sea dumped chemical warfare agents

    DEFF Research Database (Denmark)

    Sanderson, Hans; Fauser, Patrik

    This is a report on the information gathered during work related to sea dumped chemical warfare agents. It mainly reviews the work conducted in relation to the installation of the two Nord Stream gas pipeline from 2008-2012. The focus was on the weight-of-evidence risk assessment of disturbed CWA...

  12. Antiseptic skin agents for percutaneous procedures.

    Science.gov (United States)

    Lepor, Norman E; Madyoon, Hooman

    2009-01-01

    Infections associated with percutaneously implanted devices, such as pacemakers, internal cardiac defibrillators, and endovascular prostheses, create difficult and complex clinical scenarios because management can entail complete device removal, antibiotic therapy, and prolonged hospitalization. A source for pathogens is often thought to be the skin surface, making skin preparation at the time of the procedure a critical part of minimizing implantation of infected devices and prostheses. The most common skin preparation agents used today include products containing iodophors or chlorhexidine gluconate. Agents are further classified by whether they are aqueous-based or alcoholbased solutions. Traditional aqueous-based iodophors, such as povidone-iodine, are one of the few products that can be safely used on mucous membrane surfaces. Alcohol-based solutions are quick, sustained, and durable, with broader spectrum antimicrobial activity. These agents seem ideal for percutaneous procedures associated with prosthesis implantation, when it is critical to minimize skin colony counts to prevent hardware infection.

  13. Ultraviolet Raman scattering from persistent chemical warfare agents

    Science.gov (United States)

    Kullander, Fredrik; Wästerby, Pär.; Landström, Lars

    2016-05-01

    Laser induced Raman scattering at excitation wavelengths in the middle ultraviolet was examined using a pulsed tunable laser based spectrometer system. Droplets of chemical warfare agents, with a volume of 2 μl, were placed on a silicon surface and irradiated with sequences of laser pulses. The Raman scattering from V-series nerve agents, Tabun (GA) and Mustard gas (HD) was studied with the aim of finding the optimum parameters and the requirements for a detection system. A particular emphasis was put on V-agents that have been previously shown to yield relatively weak Raman scattering in this excitation band.

  14. Carbon Nanotubes: Detection of Chemical and Biological Warfare Agents

    Directory of Open Access Journals (Sweden)

    Om Kumar

    2008-09-01

    Full Text Available Discovery of carbon nanotubes has great impact on the development of newer methodologies and devicesuseful for the analysis of various types of chemicals. The functionalisation of CNTs with biomolecules relatedto chemical and biological warfare agents makes these useful for the detection of these agents. The detectionsensitivity can be increased manyfold. Various types of chemical and biological sensors were developed usingvarious type of carbon nanotubes as well as nano particles of different metals.Defence Science Journal, 2008, 58(5, pp.617-625, DOI:http://dx.doi.org/10.14429/dsj.58.1684

  15. Metal organic frameworks for the catalytic detoxification of chemical warfare nerve agents

    Energy Technology Data Exchange (ETDEWEB)

    Hupp, Joseph T.; Farha, Omar K.; Katz, Michael J.; Mondloch, Joseph E.

    2017-04-18

    A method of using a metal organic framework (MOF) comprising a metal ion and an at least bidendate organic ligand to catalytically detoxify chemical warfare nerve agents including exposing the metal-organic-framework (MOF) to the chemical warfare nerve agent and catalytically decomposing the nerve agent with the MOF.

  16. Antidotes and treatments for chemical warfare/terrorism agents: an evidence-based review.

    Science.gov (United States)

    Rodgers, G C; Condurache, C T

    2010-09-01

    This article reviews the evidence supporting the efficacy of antidotes used or recommended for the potential chemical warfare agents of most concern. Chemical warfare agents considered include cyanide, vesicants, pulmonary irritants such as chlorine and phosgene, and nerve agents. The strength of evidence for most antidotes is weak, highlighting the need for additional research in this area.

  17. Respiratory Protection Against Chemical and Biological Warfare Agents

    Directory of Open Access Journals (Sweden)

    G.K. Prasad

    2008-09-01

    Full Text Available Chemical and biological warfare (CBW agents pose unavoidable threat, both to soldiers and civilians.Exposure to such deadly agents amidst the CBW agents contaminated environment can be avoided bytaking proper protective measures. Respiratory protection is indispensable when the soldiers or civiliansare surrounded by such deadly environment as contamination-free air is needed for respiration purposes.In this context, an attempt has been made to review the literature for the past five decades on developmentof various protective devices for respiratory protection against aerosols, gases, and vapours of CBWagents. This review covers structural, textural, and adsorption properties of materials used in gas filtersand mechanical filters for the removal of CBW agents.Defence Science Journal, 2008, 58(5, pp.686-697, DOI:http://dx.doi.org/10.14429/dsj.58.1692

  18. Looming Threat of Chemical and Biological Warfare Agents

    Directory of Open Access Journals (Sweden)

    A.K. Goel

    2016-09-01

    Full Text Available In the recent past, a dramatic shift has been observed in the strategies of warfare from conventional to non-conventional. Now-a-days, traditional power is of less importance than it used to be earlier. Weapons of mass destruction, which comprise of nuclear weapons, and chemical and biological warfare agents, are posing a great peril to the world due to their devastating potential. Though, there are several bilateral as well as multilateral treaties to control the use and proliferation of these weapons, yet the risk of use of such agents by non-state actors cannot be overlooked. Chances of use of chemical and biological agents are more likely than the nuclear weapons. A comparison of nuclear, chemical and biological weapons in terms of technology, cost, signature, effectiveness on protected and un-protected troops shows that chemical and biological weapon programmes require much lower level of technology and cost than the nuclear weapon programme. Further, there is no or least distinctive and readily observable signature in biological weapon programme in comparison to nuclear and chemical weapon facilities. There can be two possibilities of use of these agents in terrorist attacks. First, there is a risk of transfer of material or know-how of these weapons to terrorists for using against the adversaries and second, the risk of these agents being pilfered due to poor security, thereby sabotaging the national security. The International Committee of Red Cross in February 1918 reckoned these agents as ‘barbarous inventions’ that can ‘only be called criminal’.

  19. The development of immunoassays for detection of chemical warfare agents

    Energy Technology Data Exchange (ETDEWEB)

    Lenz, D.E. [Army Medical Research Inst. of Chemical Defense, Aberdeen Proving Ground, MD (United States)

    1995-06-01

    With the advent of enzyme linked immunoabsorbant assays (ELISA) and monoclonal antibodies in the last two decades, there has been considerable effort devoted to the development of antibodies to detect and quantify low molecular weight toxic substances in environmental or biological fluids. Polyclonal antibodies against paraoxon (the toxic metabolite of parathion) were reported as capable of detecting paraoxon in body fluids at a level of 10{sup -9} M ({approximately}260 pg/mL) when used in a competitive inhibition enzyme immunoassay (CIEIA). Monoclonal antibodies developed against a structural analogue of the chemical warfare agent soman were capable of detecting soman in buffer solutions at a level of 10{sup -6} M ({approximately}180 ng/mL). In addition, these antibodies were highly specific for soman even in the presence of its major hydrolysis product. Subsequent studies with antisoman monoclonal antibodies reported an extension of the level of sensitivity to -80 ng/mL. Furthermore these antibodies did not cross react with other chemical warfare nerve agents such as sarin or tabun. In all cases, the time for a confirmatory test was two hours or less. Immunoassays for T-2 micotoxins have also been reported with a minimal detection range of 2 pg/assay to 50 ng/assay for the polyclonal and monoclonal T-2 antibodies respectively. These antibodies offer a sensitive, rapid and low cost approach to the diagnosis or detection of the presence of toxic chemical substances.

  20. LIDAR for Detection of Chemical and Biological Warfare Agents

    Directory of Open Access Journals (Sweden)

    S Veerabuthiran

    2011-04-01

    Full Text Available Remote detection of chemical and biological warfare agents and toxic gases in the atmosphere is of current interest to both the military and civilian agencies. Out of all currently available techniques, no single technique provides efficient detection against such threats at significant standoff distances. Light detection and ranging (LIDAR technologies, based on the transmission of laser pulses and analysis of the return signals, have demonstrated impressive capabilities in remote detection of such toxic chemicals. LIDAR is a highly sensitive tool to detect the extremely low concentrations of various toxic agents present in the form of thin clouds at distances of few kilometer. The detection of these toxic clouds is based on the approach of first detecting and measuring the range of the clouds using the scattering phenomena and subsequently identifying the composition of toxic clouds using absorption and fluorescence phenomena. Laser Science and Technology Centre (LASTEC, Delhi has been working on the design and development of LIDAR systems for detection of chemical and biological warfare (CBW agents. In this paper, theoretical analysis of differential absorption LIDAR (DIAL for detection of chemical agents and fluorescence LIDAR for detection of biological agents has been discussed. For some typical parametric conditions, the received power levels from different ranges to detect specific concentrations of chemical or biological clouds have been computed and discussed. The technical details of the indigenously developed backscattering LIDAR, which detects and measures the distance of cloud layers up to 5 km is also presented.Defence Science Journal, 2011, 61(3, pp.241-250, DOI:http://dx.doi.org/10.14429/dsj.61.556

  1. Methodology and biological monitoring of exposure to chemical warfare agents

    Energy Technology Data Exchange (ETDEWEB)

    Shih, M.L.; Smith, J.R.; McMonagle, J.D. [Army Medical Research Inst. of Chemical Defense, Aberdeen Proving Ground, MD (United States)

    1995-06-01

    In the past few years, our institute has developed several GC/MS methods for the detection of the breakdown products of toxic organophosphonates (soman, sarin, GF) and vesicant sulfur mustard in biological samples. Recently we developed a modified GC/MS method for VX and are continually working on the methodology for lewisite and tabun. The purpose is to have an analytical tool to verify the exposure of chemical warfare agents in humans. Analytical procedures for quantitating the hydrolyzed phosphonic acids from nerve agents in environmental samples have been reported by many analysts. For more complex matrices such as biological samples, there is not yet a method reported. To make these polar acids amenable to gas chromatographic analysis a prior derivatization is needed. We found the pentafluorobenzyl ester derivatives of the phosphonates are suitable for verification and pharmacokinetic studies in biological samples. This method may also serve as an alternative method for confirmation purposes in environmental samples.

  2. The development of immunoassays for detection of chemical warfare agents

    Energy Technology Data Exchange (ETDEWEB)

    Lenz, D.E.; Brimfield, A.A.; Cook, L. [Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground, MD (United States)

    1996-10-01

    With the advent of enzyme linked immunoabsorbent assays (ELISA) and monoclonal antibodies in the last two decades, there has been considerable effort devoted to the development of antibodies to detect and quantify low molecular weight toxic substances in environmental or biological fluids. Polyclonal antibodies against paraoxon (the toxic metabolite of parathion) were capable of detecting paraoxon in body fluids at a level of 10{sup -9} M ({approximately}260 pg/mL) when used in a competitive inhibition enzyme immunoassay (CIEIA). Monoclonal antibodies developed against a structural analogue of the chemical warfare agent soman were capable of detection soman in buffer solutions at a level of 10{sup -6} M ({approximately}180 ng/mL). In addition these antibodies were found to be highly specific for soman even in the presence of its major hydrolysis product. Subsequent studies with antisoman monoclonal antibodies extended the level of sensitivity to {approximately}80 ng/mL. Furthermore these antibodies did not cross react with other chemical warfare nerve agents such as sarin or tabun. In all cases, the time for a confirmatory test was two hours or less. Immunoassays for T-2 micotoxins have also been reported with a minimal detection range of 2 pg/assay to 50 ng/assay for the polyclonal and monoclonal T-2 antibodies respectively. These reagents offer a sensitive, rapid and low cost approach to the diagnosis or detection of the presence of toxic chemical substances. More recent efforts have focussed on developing antibodies specific for sulfur mustard a highly reactive vesicating agent.

  3. Estimated Chemical Warfare Agent Surface Clearance Goals for Remediation Pre-Planning

    Energy Technology Data Exchange (ETDEWEB)

    Dolislager, Frederick [University of Tennessee, Knoxville (UTK); Bansleben, Dr. Donald [U.S. Department of Homeland Security; Watson, Annetta Paule [ORNL

    2010-01-01

    Health-based surface clearance goals, in units of mg/cm2, have been developed for the persistent chemical warfare agents sulfur mustard (HD) and nerve agent VX as well as their principal degradation products. Selection of model parameters and critical receptor (toddler child) allow calculation of surface residue estimates protective for the toddler child, the general population and adult employees of a facilty that has undergone chemical warfare agent attack.

  4. Key Planning Factors for Recovery from a Chemical Warfare Agent Incident

    Science.gov (United States)

    2012-07-01

    chemical scenario involving the release of a blister agent (mustard lewisite) would result in a waste that the State of Colorado would regulate as... Waste Management ................................................................. 24 4.3 Key Planning Factors: Recovery Planning...Planning Factors, this document presents a chemical warfare agent scenario featuring Agent Yellow, a blister agent. Agent Yellow is a mixture of

  5. Platform-level Distributed Warfare Model-based on Multi-Agent System Framework

    Directory of Open Access Journals (Sweden)

    Xiong Li

    2012-05-01

    Full Text Available The multi-agent paradigm has become a useful tool in solving military problems. However, one of key challenges in multi-agent model for distributed warfare could be how to describe the microcosmic  tactical warfare platforms actions. In this paper, a platform-level distributed warfare model based on multi-agent system framework is designed to tackle this challenge. The basic ideas include:  Establishing multi-agent model by mapping from tactical warfare system’s members, i.e., warfare platforms, to respective agents; performing task decomposition and task allocation by using task-tree decomposition method and improved contract net protocol model technique; and implementing simulation by presenting battlefield terrain environment analysis algorithm based on grid approach. The  simulation demonstration results show that our model provides a feasible and effective approach to supporting the abstraction and representation of microcosmic tactical actions for complex warfare system.Defence Science Journal, 2012, 62(1, pp.180-186, DOI:http://dx.doi.org/10.14429/dsj.62.964

  6. Human scalp permeability to the chemical warfare agent VX.

    Science.gov (United States)

    Rolland, P; Bolzinger, M-A; Cruz, C; Briançon, S; Josse, D

    2011-12-01

    The use of chemical warfare agents such as VX in terrorism act might lead to contamination of the civilian population. Human scalp decontamination may require appropriate products and procedures. Due to ethical reasons, skin decontamination studies usually involve in vitro skin models, but human scalp skin samples are uncommon and expensive. The purpose of this study was to characterize the in vitro permeability to VX of human scalp, and to compare it with (a) human abdominal skin, and (b) pig skin from two different anatomic sites: ear and skull roof, in order to design a relevant model. Based on the VX skin permeation kinetics and distribution, we demonstrated that (a) human scalp was significantly more permeable to VX than abdominal skin and (b) pig-ear skin was the most relevant model to predict the in vitro human scalp permeability. Our results indicated that the follicular pathway significantly contributed to the skin absorption of VX through human scalp. In addition, the hair follicles and the stratum corneum significantly contributed to the formation of a skin reservoir for VX.

  7. Blaptica dubia as sentinels for exposure to chemical warfare agents - a pilot study.

    Science.gov (United States)

    Worek, Franz; Seeger, Thomas; Neumaier, Katharina; Wille, Timo; Thiermann, Horst

    2016-11-16

    The increased interest of terrorist groups in toxic chemicals and chemical warfare agents presents a continuing threat to our societies. Early warning and detection is a key component for effective countermeasures against such deadly agents. Presently available and near term solutions have a number of major drawbacks, e.g. lack of automated, remote warning and detection of primarily low volatile chemical warfare agents. An alternative approach is the use of animals as sentinels for exposure to toxic chemicals. To overcome disadvantages of vertebrates the present pilot study was initiated to investigate the suitability of South American cockroaches (Blaptica dubia) as warning system for exposure to chemical warfare nerve and blister agents. Initial in vitro experiments with nerve agents showed an increasing inhibitory potency in the order tabun - cyclosarin - sarin - soman - VX of cockroach cholinesterase. Exposure of cockroaches to chemical warfare agents resulted in clearly visible and reproducible reactions, the onset being dependent on the agent and dose. With nerve agents the onset was related to the volatility of the agents. The blister agent lewisite induced signs largely comparable to those of nerve agents while sulfur mustard exposed animals exhibited a different sequence of events. In conclusion, this first pilot study indicates that Blaptica dubia could serve as a warning system to exposure of chemical warfare agents. A cockroach-based system will not detect or identify a particular chemical warfare agent but could trigger further actions, e.g. specific detection and increased protective status. By designing appropriate boxes with (IR) motion sensors and remote control (IR) camera automated off-site warning systems could be realized.

  8. Analysis of Urinary Metabolites of Nerve and Blister Chemical Warfare Agents

    Science.gov (United States)

    2014-08-01

    Warfare Agents GA Tabun , ethyl dimethylphosphoramidate GB Sarin, isopropyl methylphosphonofluoridate GD Soman, pinacolyl methylphosphonofluoridate...and their metabolites Agent Metabolite GA, Tabun O P O N CN Ethyl Dimethylphosphoroamidate, EDMAP, GA Acid HO P O N CN GB, Sarin P O

  9. Treatability study report for remediation of chemical warfare agent contaminated soils using peroxysulfate ex-situ treatment. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Pugh, J.R.; Grinstead, J.H.; Farley, J.A.; Enlow, P.D.; Kelly, D.A.

    1996-07-01

    This laboratory scale study examines the feasibility of using peroxysulfate based oxidants to remediate soils contaminated with GB, Hi, and VX. The project was conducted with chemical warfare agent simulants. The study concludes that peroxysulfates, and particularly peroxydisulfate, can degrade chemical warfare agent simulants in soil and recommends continuing research.

  10. Ion mobility spectrometry and its applications in detection of chemical warfare agents.

    Science.gov (United States)

    Mäkinen, Marko A; Anttalainen, Osmo A; Sillanpää, Mika E T

    2010-12-01

    When fast detection of chemical warfare agents in the field is required, the ion mobility spectrometer may be the only suitable option. This article provides an essential survey of the different ion mobility spectrometry detection technologies. (To listen to a podcast about this feature, please go to the Analytical Chemistry multimedia page at pubs.acs.org/page/ancham/audio/index.html.).

  11. Development of Novel Alternative Technologies for Decontamination of Warfare Agents: Electric Heating with Intrinsically Conductive Polymers

    Science.gov (United States)

    2007-11-02

    in converting electric energy to thermal energy for the decon applications. Other conductive materials, such as polythiophenes , polypyrroles, carbon...Development of Novel Alternative Technologies for Decontamination of Warfare Agents: Electric Heating with Intrinsically Conductive Polymers...Joule)-heating with conducting polymers. The basic concept is that electrically conducting polymers, such as polyaniline, can be used as coatings or

  12. Disruption of a binary organogel by the chemical warfare agent soman (GD) and common organophosphorus simulants

    OpenAIRE

    Hiscock, Jennifer R.; Sambrook, Mark R; Ede, Jayne A.; Wells, Neil J.; Philip A. Gale

    2014-01-01

    The chemical warfare agent (CWA) soman (GD) acts as a molecular stimulus for the disruption of an anthracene-based binary organogel prepared in cyclohexane. The CWA simulants dimethyl methylphosphonate (DMMP) and diethyl chlorophosphate (DCP) were also found to disrupt the binary organogel through changes in solvent polarity and reactions with the gelator.\\ud \\ud

  13. On modeling of the evaporation of chemical warfare agents on the ground

    NARCIS (Netherlands)

    Westin, S.N.; Winter, S.; Karlsson, E.; Hin, A.; Oeseburg, F.

    1998-01-01

    A model for evaporation of chemical warfare agents on the ground has been developed. The process of evaporation is described in three steps: (1) the immediate drop enlargement due to impact momentum is modeled using an empirical correlation from technical literature; (2) further enlargement caused b

  14. NONDESTRUCTIVE IDENTIFICATION OF CHEMICAL WARFARE AGENTS AND EXPLOSIVES BY NEUTRON GENERATOR-DRIVEN PGNAA

    Energy Technology Data Exchange (ETDEWEB)

    T. R. Twomey; A. J. Caffrey; D. L. Chichester

    2007-02-01

    Prompt gamma-ray neutron activation analysis (PGNAA) is now a proven method for the identification of chemical warfare agents and explosives in military projectiles and storage containers. Idaho National Laboratory is developing a next-generation PGNAA instrument based on the new Ortec Detective mechanically-cooled HPGe detector and a neutron generator. In this paper we review PGNAA analysis of suspect chemical warfare munitions, and we discuss the advantages and disadvantages of replacing the californium-252 radioisotopic neutron source with a compact accelerator neutron generator.

  15. Chromatography and mass spectrometry of chemical warfare agents, toxins and related compounds: state of the art and future prospects

    NARCIS (Netherlands)

    Kientz, C.E.

    1998-01-01

    Methods for the identification of chemical warfare agents, toxins, bioregulators and related products are frequently reported in literature. These methods are often based on instrumental analysis using chromatography (gas and liquid) and mass spectrometry. Here, these instrumental techniques are dis

  16. Reactive skin decontamination lotion (RSDL) for the decontamination of chemical warfare agent (CWA) dermal exposure.

    Science.gov (United States)

    Schwartz, M D; Hurst, C G; Kirk, M A; Reedy, S J D; Braue, E H

    2012-08-01

    Rapid decontamination of the skin is the single most important action to prevent dermal absorption of chemical contaminants in persons exposed to chemical warfare agents (CWA) and toxic industrial chemicals (TICs) as a result of accidental or intentional release. Chemicals on the skin may be removed by mechanical means through the use of dry sorbents or water. Recent interest in decontamination systems which both partition contaminants away from the skin and actively neutralize the chemical has led to the development of several reactive decontamination solutions. This article will review the recently FDA-approved Reactive Skin Decontamination Lotion (RSDL) and will summarize the toxicity and efficacy studies conducted to date. Evidence of RSDL's superior performance against vesicant and organophosphorus chemical warfare agents compared to water, bleach, and dry sorbents, suggests that RSDL may have a role in mass human exposure chemical decontamination in both the military and civilian arenas.

  17. Molecular modeling toward selective inhibitors of dihydrofolate reductase from the biological warfare agent Bacillus anthracis.

    Science.gov (United States)

    Giacoppo, Juliana O S; Mancini, Daiana T; Guimarães, Ana P; Gonçalves, Arlan S; da Cunha, Elaine F F; França, Tanos C C; Ramalho, Teodorico C

    2015-02-16

    In the present work, we applied docking and molecular dynamics techniques to study 11 compounds inside the enzymes dihydrofolate reductase (DHFR) from the biological warfare agent Bacillus anthracis (BaDHFR) and Homo sapiens sapiens (HssDHFR). Six of these compounds were selected for a study with the mutant BaF96IDHFR. Our results corroborated with experimental data and allowed the proposition of a new molecule with potential activity and better selectivity for BaDHFR.

  18. Transport and Reactivity of Decontaminants to Provide Hazard Mitigation of Chemical Warfare Agents from Materials

    Science.gov (United States)

    2016-06-01

    of Additives and Impurities from Polymeric Materials; EPA 560/5-85-015; U.S. Environmental Protection Agency, Office of Pesticides and Toxic...performance, a penetrating decontaminant may cause damage to the material, such as the swelling of polymers caused by solvents or any active...Chemical Warfare Agent Degradation Products. Environ . Health Perspect. 1999, 107 (12), 933–974. 5. Kim, K.; Tsay, O.G.; Atwood, D.A.; Churchill, D.G

  19. Ge{sup 4+} doped TiO{sub 2} for stoichiometric degradation of warfare agents

    Energy Technology Data Exchange (ETDEWEB)

    Stengl, Vaclav, E-mail: stengl@iic.cas.cz [Department of Solid State Chemistry, Institute of Inorganic Chemistry AS CR v.v.i., 250 68 Rez (Czech Republic); Grygar, Tomas Matys [Department of Solid State Chemistry, Institute of Inorganic Chemistry AS CR v.v.i., 250 68 Rez (Czech Republic); Oplustil, Frantisek; Nemec, Tomas [Military Technical Institute of Protection Brno, Veslarska 230, 628 00 Brno (Czech Republic)

    2012-08-15

    Highlights: Black-Right-Pointing-Pointer We prepared nanodisperse Ge{sup 4+} doped titania by a novel synthesis method. Black-Right-Pointing-Pointer Synthesis does not involve organic solvents, organometallics nor thermal processes. Black-Right-Pointing-Pointer The prepared materials are efficient in removal of chemical warfare agents. Black-Right-Pointing-Pointer Ge{sup 4+} doping improves rate of removal of soman and agent VX by TiO{sub 2}. - Abstract: Germanium doped TiO{sub 2} was prepared by homogeneous hydrolysis of aqueous solutions of GeCl{sub 4} and TiOSO{sub 4} with urea. The synthesized samples were characterized by X-ray diffraction, scanning electron microscopy, EDS analysis, specific surface area (BET) and porosity determination (BJH). Ge{sup 4+} doping increases surface area and content of amorphous phase in prepared samples. These oxides were used in an experimental evaluation of their reactivity with chemical warfare agent, sulphur mustard, soman and agent VX. Ge{sup 4+} doping worsens sulphur mustard degradation and improves soman and agent VX degradation. The best degree of removal (degradation), 100% of soman, 99% of agent VX and 95% of sulphur mustard, is achieved with sample with 2 wt.% of germanium.

  20. Reevaluation of 1999 Health-Based Environmental Screening Levels (HBESLs) for Chemical Warfare Agents

    Energy Technology Data Exchange (ETDEWEB)

    Watson, Annetta Paule [ORNL; Dolislager, Fredrick G [ORNL

    2007-05-01

    This report evaluates whether new information and updated scientific models require that changes be made to previously published health-based environmental soil screening levels (HBESLs) and associated environmental fate/breakdown information for chemical warfare agents (USACHPPM 1999). Specifically, the present evaluation describes and compares changes that have been made since 1999 to U.S. Environmental Protection Agency (EPA) risk assessment models, EPA exposure assumptions, as well as to specific chemical warfare agent parameters (e.g., toxicity values). Comparison was made between screening value estimates recalculated with current assumptions and earlier health-based environmental screening levels presented in 1999. The chemical warfare agents evaluated include the G-series and VX nerve agents and the vesicants sulfur mustard (agent HD) and Lewisite (agent L). In addition, key degradation products of these agents were also evaluated. Study findings indicate that the combined effect of updates and/or changes to EPA risk models, EPA default exposure parameters, and certain chemical warfare agent toxicity criteria does not result in significant alteration to the USACHPPM (1999) health-based environmental screening level estimates for the G-series and VX nerve agents or the vesicant agents HD and L. Given that EPA's final position on separate Tier 1 screening levels for indoor and outdoor worker screening assessments has not yet been released as of May 2007, the study authors find that the 1999 screening level estimates (see Table ES.1) are still appropriate and protective for screening residential as well as nonresidential sites. As such, risk management decisions made on the basis of USACHPPM (1999) recommendations do not require reconsideration. While the 1999 HBESL values are appropriate for continued use as general screening criteria, the updated '2007' estimates (presented below) that follow the new EPA protocols currently under development

  1. Chemiluminescence assay for the detection of biological warfare agents

    Energy Technology Data Exchange (ETDEWEB)

    Langry, K; Horn, J

    1999-11-05

    A chemiluminescent homogeneous immunoassay and a hand-size multiassay reader are described that could be used for detecting biological materials. The special feature of the assay is that it employs two different antibodies that each bind to a unique epitope on the same antigen. Each group of epitope-specific antibodies has linked to it an enzyme of a proximal-enzyme pair. One enzyme of the pair utilizes a substrate in high concentration to produce a second substrate required by the second enzyme. This new substrate enables the second enzyme to function. The reaction of the second enzyme is configured to produce light. This chemiluminescence is detected with a charge-coupled device (CCD) camera. The proximal pair enzymes must be in close proximity to one another to allow the second enzyme to react with the product of the first enzyme. This only occurs when the enzyme-linked antibodies are attached to the antigen, whether antigen is a single protein with multiple epitopes or the surface of a cell with a variety of different antigens. As a result of their juxtaposition, the enzymes produce light only in the presence of the biological material. A brief description is given as to how this assay could be utilized in a personal bio-agent detector system.

  2. Development of Bicarbonate-Activated Peroxide as a Chemical and Biological Warfare Agent Decontaminant

    Science.gov (United States)

    2006-06-30

    Peroxide (HOO-) 7.8 29 26.7 ± 0.2 t-Butyl hydroperoxide ((CH3)3COO-) 7.8 9.7 39 Cumene hydroperoxide ((C6H6)C(CH3)2OO-) 7.8 9.3 22 All reactions run with...peroxymonocarbonate ion (HCO4-) as the oxidant in the catalytic oxidation reactions . For perhydrolytic cleavage of organophosphates the peroxycarbonate dianion...solubility and reaction rates for applications in chemical warfare agent decontamination. -O *C O O OH -O *C OH O HO *C OH O *CO2 HO2 - H2OHO *C O O OH pKa

  3. Mass Spectrometry Applications for the Identification and Quantitation of Biomarkers Resulting from Human Exposure to Chemical Warfare Agents

    Science.gov (United States)

    Smith, J. Richard; Capacio, Benedict R.

    In recent years, a number of analytical methods using biomedical samples such as blood and urine have been developed for the verification of exposure to chemical warfare agents. The majority of methods utilize gas or liquid chromatography in conjunction with mass spectrometry. In a small number of cases of suspected human exposure to chemical warfare agents, biomedical specimens have been made available for testing. This chapter provides an overview of biomarkers that have been verified in human biomedical samples, details of the exposure incidents, the methods utilized for analysis, and the biomarker concentration levels determined in the blood and/or urine.

  4. Next Generation Non-particulate Dry Nonwoven Pad for Chemical Warfare Agent Decontamination

    Energy Technology Data Exchange (ETDEWEB)

    Ramkumar, S S; Love, A; Sata, U R; Koester, C J; Smith, W J; Keating, G A; Hobbs, L; Cox, S B; Lagna, W M; Kendall, R J

    2008-05-01

    New, non-particulate decontamination materials promise to reduce both military and civilian casualties by enabling individuals to decontaminate themselves and their equipment within minutes of exposure to chemical warfare agents or other toxic materials. One of the most promising new materials has been developed using a needlepunching nonwoven process to construct a novel and non-particulate composite fabric of multiple layers, including an inner layer of activated carbon fabric, which is well-suited for the decontamination of both personnel and equipment. This paper describes the development of a composite nonwoven pad and compares efficacy test results for this pad with results from testing other decontamination systems. The efficacy of the dry nonwoven fabric pad was demonstrated specifically for decontamination of the chemical warfare blister agent bis(2-chloroethyl)sulfide (H or sulfur mustard). GC/MS results indicate that the composite fabric was capable of significantly reducing the vapor hazard from mustard liquid absorbed into the nonwoven dry fabric pad. The mustard adsorption efficiency of the nonwoven pad was significantly higher than particulate activated carbon (p=0.041) and was similar to the currently fielded US military M291 kit (p=0.952). The nonwoven pad has several advantages over other materials, especially its non-particulate, yet flexible, construction. This composite fabric was also shown to be chemically compatible with potential toxic and hazardous liquids, which span a range of hydrophilic and hydrophobic chemicals, including a concentrated acid, an organic solvent and a mild oxidant, bleach.

  5. Investigation of Acute Toxicity of a Chemical Warfare Agent in Kidneys

    Directory of Open Access Journals (Sweden)

    Turgut Topal

    2007-08-01

    Full Text Available One of the most important chemical warfare agents, sulfur mustard (SM causes crucial acute and chronic toxic effects. Lung, skin, eye and kidneys are the most affected organs. In this work, it was investigated if increased nitric oxide (NO and peroxynitrite are involved in nitrogen mustard (NM induced kidney damage. In this experimen, aminoguanidine (AG as inducible nitric oxide synthase (iNOS inhibitor and ebselen as peroxynitrite scavenger were used. NM administration resulted in important oxidant and antioxidant changes as well as tissue damage in kidneys. Therapeutic agents showed significant protection and reduced oxidant parameteres leading to tissue healing was observed. Results of this study suggest that drugs with similar properties can be used to protect kidney damage caused by NM. [TAF Prev Med Bull. 2007; 6(4: 227-232

  6. Investigation of Acute Toxicity of a Chemical Warfare Agent in Kidneys

    Directory of Open Access Journals (Sweden)

    Turgut Topal

    2007-08-01

    Full Text Available One of the most important chemical warfare agents, sulfur mustard (SM causes crucial acute and chronic toxic effects. Lung, skin, eye and kidneys are the most affected organs. In this work, it was investigated if increased nitric oxide (NO and peroxynitrite are involved in nitrogen mustard (NM induced kidney damage. In this experimen, aminoguanidine (AG as inducible nitric oxide synthase (iNOS inhibitor and ebselen as peroxynitrite scavenger were used. NM administration resulted in important oxidant and antioxidant changes as well as tissue damage in kidneys. Therapeutic agents showed significant protection and reduced oxidant parameteres leading to tissue healing was observed. Results of this study suggest that drugs with similar properties can be used to protect kidney damage caused by NM. [TAF Prev Med Bull 2007; 6(4.000: 227-232

  7. Decontamination of adsorbed chemical warfare agents on activated carbon using hydrogen peroxide solutions.

    Science.gov (United States)

    Osovsky, Ruth; Kaplan, Doron; Nir, Ido; Rotter, Hadar; Elisha, Shmuel; Columbus, Ishay

    2014-09-16

    Mild treatment with hydrogen peroxide solutions (3-30%) efficiently decomposes adsorbed chemical warfare agents (CWAs) on microporous activated carbons used in protective garments and air filters. Better than 95% decomposition of adsorbed sulfur mustard (HD), sarin, and VX was achieved at ambient temperatures within 1-24 h, depending on the H2O2 concentration. HD was oxidized to the nontoxic HD-sulfoxide. The nerve agents were perhydrolyzed to the respective nontoxic methylphosphonic acids. The relative rapidity of the oxidation and perhydrolysis under these conditions is attributed to the microenvironment of the micropores. Apparently, the reactions are favored due to basic sites on the carbon surface. Our findings suggest a potential environmentally friendly route for decontamination of adsorbed CWAs, using H2O2 without the need of cosolvents or activators.

  8. Multi Service Tactics, Techniques, and Procedures for Treatment of Chemical Warfare Agent Casualties and Conventional Military Chemical Injuries

    Science.gov (United States)

    2016-08-02

    Carbon Monoxide 1 B Phosgene 3 B Hydrogen Cyanide 3 B Chlorine 4 A Cyanogen Chloride 4 A Ethylene Oxide 2 C Formaldehyde 2 B Methyl Bromide 3 B...10-7 Chlorine ............................................................................................................ 10-8...especially vulnerable and may be targeted as part of a plan to defeat U.S. force projection. Chemical warfare agents and TICs (such as chlorine , phosgene

  9. Modern sample preparation techniques for gas chromatography-mass spectrometry analysis of environmental markers of chemical warfare agents use

    NARCIS (Netherlands)

    Terzic, O.; de Voogt, P.; Banoub, J.

    2014-01-01

    The chapter introduces problematics of on-site chemical analysis in the investigations of past chemical warfare agents (CWA) events. An overview of primary environmental degradation pathways of CWA leading to formation of chemical markers of their use is given. Conventional and modern sample

  10. Rapid Ultrasensitive Chemical-Fingerprint Detection of Chemical and Biochemical Warfare Agents

    Energy Technology Data Exchange (ETDEWEB)

    ASHBY, CAROL I.; SHEPODD, TIMOTHY J.; YELTON, WILLIAM G.; MURON, DAVID J.

    2002-12-01

    Vibrational spectra can serve as chemical fingerprints for positive identification of chemical and biological warfare molecules. The required speed and sensitivity might be achieved with surface-enhanced Raman spectroscopy (SERS) using nanotextured metal surfaces. Systematic and reproducible methods for preparing metallic surfaces that maximize sensitivity have not been previously developed. This work sought to develop methods for forming high-efficiency metallic nanostructures that can be integrated with either gas or liquid-phase chem-lab-on-a-chip separation columns to provide a highly sensitive, highly selective microanalytical system for detecting current and future chem/bio agents. In addition, improved protein microchromatographic systems have been made by the creation of acrylate-based porous polymer monoliths that can serve as protein preconcentrators to reduce the optical system sensitivity required to detect and identify a particular protein, such as a bacterial toxin.

  11. Love-Wave Sensors Combined with Microfluidics for Fast Detection of Biological Warfare Agents

    Science.gov (United States)

    Matatagui, Daniel; Fontecha, José Luis; Fernández, María Jesús; Gràcia, Isabel; Cané, Carles; Santos, José Pedro; Horrillo, María Carmen

    2014-01-01

    The following paper examines a time-efficient method for detecting biological warfare agents (BWAs). The method is based on a system of a Love-wave immunosensor combined with a microfluidic chip which detects BWA samples in a dynamic mode. In this way a continuous flow-through of the sample is created, promoting the reaction between antigen and antibody and allowing a fast detection of the BWAs. In order to prove this method, static and dynamic modes have been simulated and different concentrations of BWA simulants have been tested with two immunoreactions: phage M13 has been detected using the mouse monoclonal antibody anti-M13 (AM13), and the rabbit immunoglobulin (Rabbit IgG) has been detected using the polyclonal antibody goat anti-rabbit (GAR). Finally, different concentrations of each BWA simulants have been detected with a fast response time and a desirable level of discrimination among them has been achieved. PMID:25029282

  12. Love-Wave Sensors Combined with Microfluidics for Fast Detection of Biological Warfare Agents

    Directory of Open Access Journals (Sweden)

    Daniel Matatagui

    2014-07-01

    Full Text Available The following paper examines a time-efficient method for detecting biological warfare agents (BWAs. The method is based on a system of a Love-wave immunosensor combined with a microfluidic chip which detects BWA samples in a dynamic mode. In this way a continuous flow-through of the sample is created, promoting the reaction between antigen and antibody and allowing a fast detection of the BWAs. In order to prove this method, static and dynamic modes have been simulated and different concentrations of BWA simulants have been tested with two immunoreactions: phage M13 has been detected using the mouse monoclonal antibody anti-M13 (AM13, and the rabbit immunoglobulin (Rabbit IgG has been detected using the polyclonal antibody goat anti-rabbit (GAR. Finally, different concentrations of each BWA simulants have been detected with a fast response time and a desirable level of discrimination among them has been achieved.

  13. Love-wave sensors combined with microfluidics for fast detection of biological warfare agents.

    Science.gov (United States)

    Matatagui, Daniel; Fontecha, José Luis; Fernández, María Jesús; Gràcia, Isabel; Cané, Carles; Santos, José Pedro; Horrillo, María Carmen

    2014-07-15

    The following paper examines a time-efficient method for detecting biological warfare agents (BWAs). The method is based on a system of a Love-wave immunosensor combined with a microfluidic chip which detects BWA samples in a dynamic mode. In this way a continuous flow-through of the sample is created, promoting the reaction between antigen and antibody and allowing a fast detection of the BWAs. In order to prove this method, static and dynamic modes have been simulated and different concentrations of BWA simulants have been tested with two immunoreactions: phage M13 has been detected using the mouse monoclonal antibody anti-M13 (AM13), and the rabbit immunoglobulin (Rabbit IgG) has been detected using the polyclonal antibody goat anti-rabbit (GAR). Finally, different concentrations of each BWA simulants have been detected with a fast response time and a desirable level of discrimination among them has been achieved.

  14. Research on the Interaction of Hydrogen-Bond Acidic Polymer Sensitive Sensor Materials with Chemical Warfare Agents Simulants by Inverse Gas Chromatography

    OpenAIRE

    Liu Yang; Qiang Han; Shuya Cao; Feng Huang; Molin Qin; Chenghai Guo; Mingyu Ding

    2015-01-01

    Hydrogen-bond acidic polymers are important high affinity materials sensitive to organophosphates in the chemical warfare agent sensor detection process. Interactions between the sensor sensitive materials and chemical warfare agent simulants were studied by inverse gas chromatography. Hydrogen bonded acidic polymers, i.e., BSP3, were prepared for micro-packed columns to examine the interaction. DMMP (a nerve gas simulant) and 2-CEES (a blister agent simulant) were used as probes. Chemical an...

  15. Mass spectrometric analysis of chemical warfare agents in support of a chemical terrorist event

    Energy Technology Data Exchange (ETDEWEB)

    Hancock, J.R.; D' Agostino, P.A.; Chenier, C.L. [Defence R and D Canada Suffield, Medicine Hat, AB (Canada)

    2003-07-01

    Chemical warfare (CW) agents are considered to be any chemicals which, through their chemical action on life processes can cause death, temporary incapacitation or permanent harm to humans or animals. In Canada, the probability of a CW terrorist attack is low despite the catastrophic consequences that would result from such an attack. The three levels of government would be responding to such an event. CW agent response training for all levels of government is offered at Defence R and D Canada-Suffield. Appropriate samples must be collected for analysis in a laboratory, as such an event would lead to a criminal investigation. Research into new methods for the identification of CW agents is being conducted by the analytical laboratory at Defence R and D Canada-Suffield. Gas chromatography and mass spectrometry (GC-MS) are being used extensively to separate and characterize CW agents in organic extracts. In the case of aqueous samples, another method might be more appropriate, since additional sample handling is required before GC-MS analysis can be performed. Minimal sample handling is required when using liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS) for direct analysis of CW agents. The authors demonstrated the use of LC-ESI-MS for analyzing CW agents and their hydrolysis products in aqueous samples. For the analysis of nerve agents and phosphonic acids in soil, comparable or superior results to organic extraction and GC-MS were obtained for aqueous extractions followed by LC-ESI-MS. The combination of GC-MS and LC-ESI-MS for the analysis of mustard related compounds in soil extracts from a former mustard storage area showed that the two methods are complementary in this situation. 9 refs., 3 tabs., 5 figs.

  16. Limitations and challenges in treatment of acute chemical warfare agent poisoning.

    Science.gov (United States)

    Thiermann, Horst; Worek, Franz; Kehe, Kai

    2013-12-01

    Recent news from Syria on a possible use of chemical warfare agents made the headlines. Furthermore, the motivation of terrorists to cause maximal harm shifts these agents into the public focus. For incidents with mass casualties appropriate medical countermeasures must be available. At present, the most important threats arise from nerve agents and sulfur mustard. At first, self-protection and protection of medical units from contamination is of utmost importance. Volatile nerve agent exposure, e.g. sarin, results in fast development of cholinergic crisis. Immediate clinical diagnosis can be confirmed on-site by assessment of acetylcholinesterase activity. Treatment with autoinjectors that are filled with 2mg atropine and an oxime (at present obidoxime, pralidoxime, TMB-4 or HI-6) are not effective against all nerve agents. A more aggressive atropinisation has to be considered and more effective oximes (if possible with a broad spectrum or a combination of different oximes) as well as alternative strategies to cope with high acetylcholine levels at synaptic sites should be developed. A further gap exists for the treatment of patients with sustained cholinergic crisis that has to be expected after exposure to persistent nerve agents, e.g. VX. The requirement for long-lasting artificial ventilation can be reduced with an oxime therapy that is optimized by using the cholinesterase status for guidance or by measures (e.g. scavengers) that are able to reduce the poison load substantially in the patients. For sulfur mustard poisoning no specific antidote is available until now. Symptomatic measures as used for treatment of burns are recommended together with surgical or laser debridement. Thus, huge amounts of resources are expected to be consumed as wound healing is impaired. Possible depots of sulfur mustard in tissues may aggravate the situation. More basic knowledge is necessary to improve substantially therapeutic options. The use of stem cells may provide a new

  17. Efficacy of liquid and foam decontamination technologies for chemical warfare agents on indoor surfaces.

    Science.gov (United States)

    Love, Adam H; Bailey, Christopher G; Hanna, M Leslie; Hok, Saphon; Vu, Alex K; Reutter, Dennis J; Raber, Ellen

    2011-11-30

    Bench-scale testing was used to evaluate the efficacy of four decontamination formulations on typical indoor surfaces following exposure to the liquid chemical warfare agents sarin (GB), soman (GD), sulfur mustard (HD), and VX. Residual surface contamination on coupons was periodically measured for up to 24h after applying one of four selected decontamination technologies [0.5% bleach solution with trisodium phosphate, Allen Vanguard Surface Decontamination Foam (SDF™), U.S. military Decon Green™, and Modec Inc. and EnviroFoam Technologies Sandia Decontamination Foam (DF-200)]. All decontamination technologies tested, except for the bleach solution, performed well on nonporous and nonpermeable glass and stainless-steel surfaces. However, chemical agent residual contamination typically remained on porous and permeable surfaces, especially for the more persistent agents, HD and VX. Solvent-based Decon Green™ performed better than aqueous-based bleach or foams on polymeric surfaces, possibly because the solvent is able to penetrate the polymer matrix. Bleach and foams out-performed Decon Green for penetrating the highly polar concrete surface. Results suggest that the different characteristics needed for an ideal and universal decontamination technology may be incompatible in a single formulation and a strategy for decontaminating a complex facility will require a range of technologies.

  18. Multifunctional ultra-high vacuum apparatus for studies of the interactions of chemical warfare agents on complex surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Wilmsmeyer, Amanda R.; Morris, John R. [Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061 (United States); Gordon, Wesley O.; Mantooth, Brent A.; Lalain, Teri A. [Research and Technology Directorate, U.S. Army Edgewood Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010 (United States); Davis, Erin Durke [OptiMetrics, Inc., Abingdon, Maryland 21009 (United States)

    2014-01-15

    A fundamental understanding of the surface chemistry of chemical warfare agents is needed to fully predict the interaction of these toxic molecules with militarily relevant materials, catalysts, and environmental surfaces. For example, rules for predicting the surface chemistry of agents can be applied to the creation of next generation decontaminants, reactive coatings, and protective materials for the warfighter. Here, we describe a multifunctional ultra-high vacuum instrument for conducting comprehensive studies of the adsorption, desorption, and surface chemistry of chemical warfare agents on model and militarily relevant surfaces. The system applies reflection-absorption infrared spectroscopy, x-ray photoelectron spectroscopy, and mass spectrometry to study adsorption and surface reactions of chemical warfare agents. Several novel components have been developed to address the unique safety and sample exposure challenges that accompany the research of these toxic, often very low vapor pressure, compounds. While results of vacuum-based surface science techniques may not necessarily translate directly to environmental processes, learning about the fundamental chemistry will begin to inform scientists about the critical aspects that impact real-world applications.

  19. Ultra-Fast Degradation of Chemical Warfare Agents Using MOF-Nanofiber Kebabs.

    Science.gov (United States)

    Zhao, Junjie; Lee, Dennis T; Yaga, Robert W; Hall, Morgan G; Barton, Heather F; Woodward, Ian R; Oldham, Christopher J; Walls, Howard J; Peterson, Gregory W; Parsons, Gregory N

    2016-10-10

    The threat associated with chemical warfare agents (CWAs) motivates the development of new materials to provide enhanced protection with a reduced burden. Metal-organic frame-works (MOFs) have recently been shown as highly effective catalysts for detoxifying CWAs, but challenges still remain for integrating MOFs into functional filter media and/or protective garments. Herein, we report a series of MOF-nanofiber kebab structures for fast degradation of CWAs. We found TiO2 coatings deposited via atomic layer deposition (ALD) onto polyamide-6 nanofibers enable the formation of conformal Zr-based MOF thin films including UiO-66, UiO-66-NH2 , and UiO-67. Cross-sectional TEM images show that these MOF crystals nucleate and grow directly on and around the nanofibers, with strong attachment to the substrates. These MOF-functionalized nanofibers exhibit excellent reactivity for detoxifying CWAs. The half-lives of a CWA simulant compound and nerve agent soman (GD) are as short as 7.3 min and 2.3 min, respectively. These results therefore provide the earliest report of MOF-nanofiber textile composites capable of ultra-fast degradation of CWAs.

  20. The possible role of intravenous lipid emulsion in the treatment of chemical warfare agent poisoning

    Directory of Open Access Journals (Sweden)

    Arik Eisenkraft

    2016-01-01

    Full Text Available Organophosphates (OPs are cholinesterase inhibitors that lead to a characteristic toxidrome of hypersecretion, miosis, dyspnea, respiratory insufficiency, convulsions and, without proper and early antidotal treatment, death. Most of these compounds are highly lipophilic. Sulfur mustard is a toxic lipophilic alkylating agent, exerting its damage through alkylation of cellular macromolecules (e.g., DNA, proteins and intense activation of pro-inflammatory pathways. Currently approved antidotes against OPs include the peripheral anticholinergic drug atropine and an oxime that reactivates the inhibited cholinesterase. Benzodiazepines are used to stop organophosphate-induced seizures. Despite these approved drugs, efforts have been made to introduce other medical countermeasures in order to attenuate both the short-term and long-term clinical effects following exposure. Currently, there is no antidote against sulfur mustard poisoning. Intravenous lipid emulsions are used as a source of calories in parenteral nutrition. In recent years, efficacy of lipid emulsions has been shown in the treatment of poisoning by fat-soluble compounds in animal models as well as clinically in humans. In this review we discuss the usefulness of intravenous lipid emulsions as an adjunct to the in-hospital treatment of chemical warfare agent poisoning.

  1. Fate of chemical warfare agents and toxic industrial chemicals in landfills.

    Science.gov (United States)

    Bartelt-Hunt, Shannon L; Barlaz, Morton A; Knappe, Detlef R U; Kjeldsen, Peter

    2006-07-01

    One component of preparedness for a chemical attack is planning for the disposal of contaminated debris. To assess the feasibility of contaminated debris disposal in municipal solid waste (MSW) landfills, the fate of selected chemical warfare agents (CWAs) and toxic industrial chemicals (TICs) in MSW landfills was predicted with a mathematical model. Five blister agents [sulfur mustard (HD), nitrogen mustard (HN-2), lewisite (L), ethyldichloroarsine (ED), and phosgene oxime (CX)], eight nerve agents [tabun (GA), sarin (GB), soman (GD), GE, GF, VX, VG, and VM], one riot-control agent [CS], and two TICs [furan and carbon disulfide] were studied. The effects of both infiltration (climate) and contaminant biodegradability on fate predictions were assessed. Model results showed that hydrolysis and gas-phase advection were the principal fate pathways for CWAs and TICs, respectively. Apart from CX and the TICs, none of the investigated compounds was predicted to persist in a landfill for more than 5 years. Climate had little impact on CWA/TIC fate, and biodegradability was only important for compounds with long hydrolysis half-lives. Monte Carlo simulations were performed to assess the influence of uncertainty in model input parameters on CWA/TIC fate predictions. Correlation analyses showed that uncertainty in hydrolysis rate constants was the primary contributor to variance of CWA fate predictions, while uncertainty in the Henry's Law constant and landfill gas-production rate accounted for most of the variance of TIC fate predictions. CWA hydrolysates were more persistent than the parent CWAs, but limited information is available on abiotic or biotic transformation rates for these chemicals.

  2. Biological Warfare Agents, Toxins, Vectors and Pests as Biological Terrorism Agents

    Science.gov (United States)

    2003-07-01

    synthesis of >100 amino acid polypeptides, advanced genetic manipulation). Toxins as terrorism agents: 1. Botulinum toxin 2. Ricin 3...marginatum 5. Hyalomma Anatolicum Anatolicum 6. Dermacentor spp. 7. Rhipicephalus spp. 8. Amblyomma spp. 9. Mansonia spp. 10. Culex spp. 11

  3. Advances in toxicology and medical treatment of chemical warfare nerve agents

    Directory of Open Access Journals (Sweden)

    Moshiri Mohammd

    2012-11-01

    Full Text Available Abstract Organophosphorous (OP Nerve agents (NAs are known as the deadliest chemical warfare agents. They are divided into two classes of G and V agents. Most of them are liquid at room temperature. NAs chemical structures and mechanisms of actions are similar to OP pesticides, but their toxicities are higher than these compounds. The main mechanism of action is irreversible inhibition of Acetyl Choline Esterase (AChE resulting in accumulation of toxic levels of acetylcholine (ACh at the synaptic junctions and thus induces muscarinic and nicotinic receptors stimulation. However, other mechanisms have recently been described. Central nervous system (CNS depression particularly on respiratory and vasomotor centers may induce respiratory failure and cardiac arrest. Intermediate syndrome after NAs exposure is less common than OP pesticides poisoning. There are four approaches to detect exposure to NAs in biological samples: (I AChE activity measurement, (II Determination of hydrolysis products in plasma and urine, (III Fluoride reactivation of phosphylated binding sites and (IV Mass spectrometric determination of cholinesterase adducts. The clinical manifestations are similar to OP pesticides poisoning, but with more severity and fatalities. The management should be started as soon as possible. The victims should immediately be removed from the field and treatment is commenced with auto-injector antidotes (atropine and oximes such as MARK I kit. A 0.5% hypochlorite solution as well as novel products like M291 Resin kit, G117H and Phosphotriesterase isolated from soil bacterias, are now available for decontamination of NAs. Atropine and oximes are the well known antidotes that should be infused as clinically indicated. However, some new adjuvant and additional treatment such as magnesium sulfate, sodium bicarbonate, gacyclidine, benactyzine, tezampanel, hemoperfusion, antioxidants and bioscavengers have recently been used for OP NAs poisoning.

  4. Plastic antibody for the recognition of chemical warfare agent sulphur mustard.

    Science.gov (United States)

    Boopathi, M; Suryanarayana, M V S; Nigam, Anil Kumar; Pandey, Pratibha; Ganesan, K; Singh, Beer; Sekhar, K

    2006-06-15

    Molecularly imprinted polymers (MIPs) known as plastic antibodies (PAs) represent a new class of materials possessing high selectivity and affinity for the target molecule. Since their discovery, PAs have attracted considerable interest from bio- and chemical laboratories to pharmaceutical institutes. PAs are becoming an important class of synthetic materials mimicking molecular recognition by natural receptors. In addition, they have been utilized as catalysts, sorbents for solid-phase extraction, stationary phase for liquid chromatography and mimics of enzymes. In this paper, first time we report the preparation and characterization of a PA for the recognition of blistering chemical warfare agent sulphur mustard (SM). The SM imprinted PA exhibited more surface area when compared to the control non-imprinted polymer (NIP). In addition, SEM image showed an ordered nano-pattern for the PA of SM that is entirely different from the image of NIP. The imprinting also enhanced SM rebinding ability to the PA when compared to the NIP with an imprinting efficiency (alpha) of 1.3.

  5. Measurements of Raman scattering in the middle ultraviolet band from persistent chemical warfare agents

    Science.gov (United States)

    Kullander, Fredrik; Landström, Lars; Lundén, Hampus; Mohammed, Abdesalam; Olofsson, Göran; Wästerby, Pär.

    2014-05-01

    The very low Raman scattering cross section and the fluorescence background limit the measuring range of Raman based instruments operating in the visible or infrared band. We are exploring if laser excitation in the middle ultraviolet (UV) band between 200 and 300 nm is useful and advantageous for detection of persistent chemical warfare agents (CWA) on various kinds of surfaces. The UV Raman scattering from tabun, mustard gas, VX and relevant simulants in the form of liquid surface contaminations has been measured using a laboratory experimental setup with a short standoff distance around 1 meter. Droplets having a volume of 1 μl were irradiated with a tunable pulsed laser swept within the middle UV band. A general trend is that the signal strength moves through an optimum when the laser excitation wavelength is swept between 240 and 300 nm. The signal from tabun reaches a maximum around 265 nm, the signal from mustard gas around 275 nm. The Raman signal from VX is comparably weak. Raman imaging by the use of a narrow bandpass UV filter is also demonstrated.

  6. Modified clay minerals efficiency against chemical and biological warfare agents for civil human protection.

    Science.gov (United States)

    Plachá, Daniela; Rosenbergová, Kateřina; Slabotínský, Jiří; Kutláková, Kateřina Mamulová; Studentová, Soňa; Martynková, Gražyna Simha

    2014-04-30

    Sorption efficiencies of modified montmorillonite and vermiculite of their mono ionic Na and organic HDTMA and HDP forms were studied against chemical and biological warfare agents such as yperite and selected bacterial strains. Yperite interactions with modified clay minerals were observed through its capture in low-density polyethylene foil-modified clay composites by measuring yperite gas permeation with using chemical indication and gas chromatography methods. The antibacterial activities of synthetized organoclays were tested against selected Gram-positive and Gram-negative bacterial species in minimum inhibitory concentration tests. The obtained results showed a positive influence of modified clay minerals on the significant yperite breakthrough-time increase. The most effective material was the polyethylene-Na form montmorillonite, while the polyethylene-Na form vermiculite showed the lowest efficiency. With increasing organic cations loading in the interlayer space the montmorillonite efficiency decreased, and in the case of vermiculite an opposite effect was observed. Generally the modified montmorillonites were more effective than modified vermiculites. The HDP cations seem to be more effective compare to the HDTMA. The antibacterial activity tests confirmed efficiency of all organically modified clay minerals against Gram-positive bacteria. The confirmation of antibacterial activity against Y. pestis, plague bacteria, is the most interesting result of this part of the study.

  7. Toxicogenomic studies of human neural cells following exposure to organophosphorus chemical warfare nerve agent VX.

    Science.gov (United States)

    Gao, Xiugong; Lin, Hsiuling; Ray, Radharaman; Ray, Prabhati

    2013-05-01

    Organophosphorus (OP) compounds represent an important group of chemical warfare nerve agents that remains a significant and constant military and civilian threat. OP compounds are considered acting primarily via cholinergic pathways by binding irreversibly to acetylcholinesterase, an important regulator of the neurotransmitter acetylcholine. Many studies over the past years have suggested that other mechanisms of OP toxicity exist, which need to be unraveled by a comprehensive and systematic approach such as genome-wide gene expression analysis. Here we performed a microarray study in which cultured human neural cells were exposed to 0.1 or 10 μM of VX for 1 h. Global gene expression changes were analyzed 6, 24, and 72 h post exposure. Functional annotation and pathway analysis of the differentially expressed genes has revealed many genes, networks and canonical pathways that are related to nervous system development and function, or to neurodegenerative diseases such as Alzheimer's disease, Huntington's disease, and Parkinson's disease. In particular, the neuregulin pathway impacted by VX exposure has important implications in many nervous system diseases including schizophrenia. These results provide useful information valuable in developing suitable antidotes for more effective prevention and treatment of, as well as in developing biomarkers for, VX-induced chronic neurotoxicity.

  8. Percutaneous exposure to the nerve agent VX: Efficacy of combined atropine, obidoxime and diazepam treatment

    NARCIS (Netherlands)

    Joosen, M.J.A.; Schans, M.J. van der; Helden, H.P.M. van

    2010-01-01

    The nerve agent VX is most likely to enter the body via liquid contamination of the skin. After percutaneous exposure, the slow uptake into the blood, and its slow elimination result in toxic levels in plasma for a period of several hours. Consequently, this has implications for the development of t

  9. Percutaneous

    Directory of Open Access Journals (Sweden)

    Hazem Khamis

    2014-03-01

    Conclusions: Our initial results with the MitraClip device in a very small number of patients indicate that percutaneous edge-to-edge mitral valve repair is feasible and may be accomplished with favorable short-term safety and efficacy results.

  10. Surface plasmon resonance detection of biological warfare agent Staphylococcal enterotoxin B using high affinity monoclonal antibody

    Energy Technology Data Exchange (ETDEWEB)

    Gupta, Garima; Singh, Pawan K.; Boopathi, M., E-mail: mannanboopathi@yahoo.com; Kamboj, D.V.; Singh, Beer; Vijayaraghavan, R.

    2010-11-30

    A novel sensitive method was developed for the detection as well as quantification of Staphylococcal enterotoxin B (SEB) using surface plasmon resonance (SPR). It is well known that the amount of SEB needed to cause the intoxication to human beings is very less and this concentration (0.02 {mu}g/kg) is highly dangerous, hence, it is used as biological warfare agent. Thus, the need to develop a reliable and potential detection system against SEB is warranted. In the present work, SEB antibody was immobilized on carboxymethyldextran modified gold chip. The immobilization of SEB antibody and interaction of antigen with immobilized antibody were in-situ characterized by SPR and electrochemical impedance spectroscopy. A sample solution containing SEB antigen was injected in a working channel and the results revealed linearity in the concentration from 2.0 to 32.0 pM with a detection limit of 1.0 pM. By using kinetic evaluation software, K{sub D} (equilibrium constant) and Bmax (maximum binding capacity of analyte) values were calculated and found to be 13 pM and 424.23, respectively. Moreover, the thermodynamic parameter, change in Gibb's free energy was deduced and found to be -62.08 kJ/mol and this value shows the spontaneous interaction between SEB antigen and SEB antibody. In order to optimize the detection method, temperature and pH variation studies were also performed. Interference study was conducted to know the selectivity for the antigen-antibody interaction of SEB. The selectivity efficiency of SEB, SEC, SEA and SED were 100, 27.15, 20.01 and 12.05%, respectively towards SEB antibody.

  11. Multiple functional UV devices based on III-Nitride quantum wells for biological warfare agent detection

    Science.gov (United States)

    Wang, Qin; Savage, Susan; Persson, Sirpa; Noharet, Bertrand; Junique, Stéphane; Andersson, Jan Y.; Liuolia, Vytautas; Marcinkevicius, Saulius

    2009-02-01

    We have demonstrated surface normal detecting/filtering/emitting multiple functional ultraviolet (UV) optoelectronic devices based on InGaN/GaN, InGaN/AlGaN and AlxGa1-xN/AlyGa1-yN multiple quantum well (MQW) structures with operation wavelengths ranging from 270 nm to 450 nm. Utilizing MQW structure as device active layer offers a flexibility to tune its long cut-off wavelength in a wide UV range from solar-blind to visible by adjusting the well width, well composition and barrier height. Similarly, its short cut-off wavelength can be adjusted by using a GaN or AlGaN block layer on a sapphire substrate when the device is illuminated from its backside, which further provides an optical filtering effect. When a current injects into the device under forward bias the device acts as an UV light emitter, whereas the device performs as a typical photodetector under reverse biases. With applying an alternating external bias the device might be used as electroabsorption modulator due to quantum confined Stark effect. In present work fabricated devices have been characterized by transmission/absorption spectra, photoresponsivity, electroluminescence, and photoluminescence measurements under various forward and reverse biases. The piezoelectric effect, alloy broadening and Stokes shift between the emission and absorption spectra in different InGaN- and AlGaN-based QW structures have been investigated and compared. Possibilities of monolithic or hybrid integration using such multiple functional devices for biological warfare agents sensing application have also be discussed.

  12. Research on the Interaction of Hydrogen-Bond Acidic Polymer Sensitive Sensor Materials with Chemical Warfare Agents Simulants by Inverse Gas Chromatography

    Directory of Open Access Journals (Sweden)

    Liu Yang

    2015-06-01

    Full Text Available Hydrogen-bond acidic polymers are important high affinity materials sensitive to organophosphates in the chemical warfare agent sensor detection process. Interactions between the sensor sensitive materials and chemical warfare agent simulants were studied by inverse gas chromatography. Hydrogen bonded acidic polymers, i.e., BSP3, were prepared for micro-packed columns to examine the interaction. DMMP (a nerve gas simulant and 2-CEES (a blister agent simulant were used as probes. Chemical and physical parameters such as heats of absorption and Henry constants of the polymers to DMMP and 2-CEES were determined by inverse gas chromatography. Details concerning absorption performance are also discussed in this paper.

  13. Research on the interaction of hydrogen-bond acidic polymer sensitive sensor materials with chemical warfare agents simulants by inverse gas chromatography.

    Science.gov (United States)

    Yang, Liu; Han, Qiang; Cao, Shuya; Huang, Feng; Qin, Molin; Guo, Chenghai; Ding, Mingyu

    2015-06-02

    Hydrogen-bond acidic polymers are important high affinity materials sensitive to organophosphates in the chemical warfare agent sensor detection process. Interactions between the sensor sensitive materials and chemical warfare agent simulants were studied by inverse gas chromatography. Hydrogen bonded acidic polymers, i.e., BSP3, were prepared for micro-packed columns to examine the interaction. DMMP (a nerve gas simulant) and 2-CEES (a blister agent simulant) were used as probes. Chemical and physical parameters such as heats of absorption and Henry constants of the polymers to DMMP and 2-CEES were determined by inverse gas chromatography. Details concerning absorption performance are also discussed in this paper.

  14. Particle Swarm Social Adaptive Model for Multi-Agent Based Insurgency Warfare Simulation

    Energy Technology Data Exchange (ETDEWEB)

    Cui, Xiaohui [ORNL; Potok, Thomas E [ORNL

    2009-12-01

    To better understand insurgent activities and asymmetric warfare, a social adaptive model for modeling multiple insurgent groups attacking multiple military and civilian targets is proposed and investigated. This report presents a pilot study using the particle swarm modeling, a widely used non-linear optimal tool to model the emergence of insurgency campaign. The objective of this research is to apply the particle swarm metaphor as a model of insurgent social adaptation for the dynamically changing environment and to provide insight and understanding of insurgency warfare. Our results show that unified leadership, strategic planning, and effective communication between insurgent groups are not the necessary requirements for insurgents to efficiently attain their objective.

  15. Estimating areas threatened by contamination from leaking chemical warfare agents dumped into the Baltic Sea

    Science.gov (United States)

    Jakacki, Jaromir; Przyborska, Anna; Andrzejewski, Jan

    2017-04-01

    Approximately 60,000 tons of chemical munitions were dumped into the Baltic Sea after World War II (the exact amount is unknown and some sources estimate it as more than 200,000 tons). Dumped munitions still pose a risk of leakage caused by erosion and corrosion, and it is important to know the danger areas. Because of wide dispersion of the dumped munitions, modelling is only one tool that could provide wide image of physical state of the sea at all locations and which could also be used for analysing contamination during a potential leakage. Obviously, it is possible to take samples at each dumpsite, but modelling also allows to develop possible scenarios of leakages under specific physical conditions. For the purpose of analysis of potential leakage a high-resolution model (HRM) of the contamination will be embedded in the hydrodynamic model (HM) of the Baltic Sea. The HRM will use data from general circulation model results of estimated resolution of nearly 2 km. The Parallel Ocean Program will be implemented as the HM for the whole Baltic Sea. Atmospheric data from regional implementation of the Weather Research and Forecasting System (WRF) have been used as the top boundary conditions of the HM, and sea level data from Gothenburg had been included into model barotropic equation as lateral boundary conditions. Passive tracer will represent the contamination in the HRM and horizontal resolution of the HRM will be close to 50 meters. Passive tracers will also be implemented in the HM - for comparison of the results. For proper representation of potential leakage of chemical warfare agents the HRM will have included diffusion and advection processes. The results from the HM are going to be interpolated into the HRM domain and then integration will be performed. Based on the implemented simulations, estimated contaminated area and its comparison from the HRM as well as from the HM will be presented. The research work was fund by the European Union (European

  16. Wearable Atmospheric Pressure Plasma Fabrics Produced by Knitting Flexible Wire Electrodes for the Decontamination of Chemical Warfare Agents

    Science.gov (United States)

    Jung, Heesoo; Seo, Jin Ah; Choi, Seungki

    2017-01-01

    One of the key reasons for the limited use of atmospheric pressure plasma (APP) is its inability to treat non-flat, three-dimensional (3D) surface structures, such as electronic devices and the human body, because of the rigid electrode structure required. In this study, a new APP system design—wearable APP (WAPP)—that utilizes a knitting technique to assemble flexible co-axial wire electrodes into a large-area plasma fabric is presented. The WAPP device operates in ambient air with a fully enclosed power electrode and grounded outer electrode. The plasma fabric is flexible and lightweight, and it can be scaled up for larger areas, making it attractive for wearable APP applications. Here, we report the various plasma properties of the WAPP device and successful test results showing the decontamination of toxic chemical warfare agents, namely, mustard (HD), soman (GD), and nerve (VX) agents.

  17. Dual-Function Metal-Organic Framework as a Versatile Catalyst for Detoxifying Chemical Warfare Agent Simulants.

    Science.gov (United States)

    Liu, Yangyang; Moon, Su-Young; Hupp, Joseph T; Farha, Omar K

    2015-12-22

    The nanocrystals of a porphyrin-based zirconium(IV) metal-organic framework (MOF) are used as a dual-function catalyst for the simultaneous detoxification of two chemical warfare agent simulants at room temperature. Simulants of nerve agent (such as GD, VX) and mustard gas, dimethyl 4-nitrophenyl phosphate and 2-chloroethyl ethyl sulfide, have been hydrolyzed and oxidized, respectively, to nontoxic products via a pair of pathways catalyzed by the same MOF. Phosphotriesterase-like activity of the Zr6-containing node combined with photoactivity of the porphyrin linker gives rise to a versatile MOF catalyst. In addition, bringing the MOF crystals down to the nanoregime leads to acceleration of the catalysis.

  18. Hand-held analyser based on microchip electrophoresis with contactless conductivity detection for measurement of chemical warfare agent degradation products

    Science.gov (United States)

    Duran, Karolina-Petkovic; Zhu, Yonggang; Chen, Chuanpin; Swallow, Anthony; Stewart, Robert; Hoobin, Pam; Leech, Patrick; Ovenden, Simon

    2008-12-01

    This paper reports on the development of a hand-held device for on-site detection of organophosphonate nerve agent degradation products. This field-deployable analyzer relies on efficient microchip electrophoresis separation of alkyl methylphosphonic acids and their sensitive contactless conductivity detection. Miniaturized, low-powered design is coupled with promising analytical performance for separating the breakdown products of chemical warfare agents such as Soman, Sarin and VX . The detector has a detection limit of about 10 μg/mL and has a good linear response in the range 10-300 μg/mL concentration range. Applicability to environmental samples is demonstrated .The new hand-held analyzer offers great promise for converting conventional ion chromatography or capillary electrophoresis sophisticated systems into a portable forensic laboratory for faster, simpler and more reliable on-site screening.

  19. Evaluation of Molecular Markers and Analytical Methods Documenting the Occurrence of Mustard Gas and Arsenical Warfare Agents in Soil.

    Science.gov (United States)

    Sassolini, Alessandro; Brinchi, Giampaolo; Di Gennaro, Antonio; Dionisi, Simone; Dominici, Carola; Fantozzi, Luca; Onofri, Giorgio; Piazza, Rosario; Guidotti, Maurizio

    2016-09-01

    The chemicals warfare agents (CWAs) are an extremely toxic class of molecules widely produced in many industrialized countries for decades, these compounds frequently contained arsenic. The plants where the CWAs have been produced or the plants where they have been demilitarized after the Second World War with unacceptable techniques can represent a serious environmental problem. CWAs standards are difficult to find on market so in present work an environmental assessment method based on markers has been proposed. Triphenylarsine, phenylarsine oxide and thiodiglycol have been selected as markers. Three reliable analytical methods based on gaschromatography and mass detection have been proposed and tested for quantitative analysis of markers. Methods performance have been evaluated testing uncertainty, linearity, recovery and detection limits and also comparing detection limits with exposure limits of reference CWAs. Proposed assessment methods have been applied to a case study of a former industrial plant sited in an area characterized by a high background of mineral arsenic.

  20. NATO Advanced Research Workshop on Fluorescence and other Optical Properties of Biological Particles for Biological Warfare Agent Sensors

    CERN Document Server

    Hoekstra, Alfons; Videen, Gorden; Optics of Biological Particles

    2007-01-01

    This book covers the optics of single biological particles, both theory and experiment, with emphasis on Elastic Light Scattering and Fluorescence. It deals with the optics of bacteria (bio-aerosols), marine particles (selected phytoplankton communities) and red and white blood cells. Moreover, there are dedicated chapters on a general theory for scattering by a cell, and modelling and simulation of scattering by inhomogeneous biological cells. Finally, one chapter is dedicated to astro-biological signatures, discussing the possibilities for detecting non-terrestrial biological material. The volume has up-to-date discussions on new experimental and numerical techniques, and many examples of applications of these techniques in real-life systems, as used to detect and characterize e.g. biological warfare agents or human blood cells.

  1. Capillary zone electrophoresis analysis and detection of mid-spectrum biological warfare agents. Suffield memorandum No. 1463

    Energy Technology Data Exchange (ETDEWEB)

    Boulet, C.A.

    1995-12-31

    Mid-spectrum biological warfare agents such as proteins, peptides, and toxins are often difficult to analyze and often require individually developed assay methods for detection and identification. In this regard, capillary electrophoresis is an important, emerging technique for separation and quantitation of peptides and proteins, providing separation efficiencies up to two orders of magnitude greater than high performance liquid chromatography. The technique can also analyze a broad range of compounds, has a simple instrument design which can be automated, and has low sample volume requirements. In this study, a highly efficient and reproducible capillary zone electrophoresis method was developed to separate and identify a series of nine peptides of defense interest including bradykinin, leucine enkephalin, and oxytocin. The paper demonstrates three strategies which could be used in a fully automated field detection and identification system for unknown peptides.

  2. How Do I Know? A Guide to the Selection of Personal Protective Equipment for Use in Responding to A Release of Chemical Warfare Agents

    Energy Technology Data Exchange (ETDEWEB)

    Foust, C.B.

    1999-05-01

    An incident involving chemical warfare agents requires a unique hazardous materials (HAZMAT) response. As with an HAZMAT event, federal regulations prescribe that responders must be protected from exposure to the chemical agents. But unlike other HAZMAT events, special considerations govern selection of personal protective equipment (PPE). PPE includes all clothing, respirators and monitoring devices used to respond to a chemical release. PPE can differ depending on whether responders are military or civilian personnel.

  3. Percutaneous exposure to the nerve agent VX: Efficacy of combined atropine, obidoxime and diazepam treatment.

    Science.gov (United States)

    Joosen, Marloes J A; van der Schans, Marcel J; van Helden, Herman P M

    2010-10-06

    The nerve agent VX is most likely to enter the body via liquid contamination of the skin. After percutaneous exposure, the slow uptake into the blood, and its slow elimination result in toxic levels in plasma for a period of several hours. Consequently, this has implications for the development of toxic signs and for treatment onset. In the present study, clinical signs, toxicokinetics and effects on respiration, electroencephalogram and heart rate were investigated in hairless guinea pigs after percutaneous exposure to 500 microg/kg VX. We found that full inhibition of AChE and partial inhibition of BuChE in blood were accompanied by the onset of clinical signs, reflected by a decline in respiratory minute volume, bronchoconstriction and a decrease in heart rate. Furthermore, we investigated the therapeutic efficacy of a single dose of atropine, obidoxime and diazepam, administered at appearance of first clinical signs, versus that of repetitive dosing of these drugs on the reappearance of signs. A single shot treatment extended the period to detrimental physiological decline and death for several hours, whereas repetitive administration remained effective as long as treatment was continued. In conclusion, percutaneous VX poisoning showed to be effectively treatable when diagnosed on time and when continued over the entire period of time during which VX, in case of ineffective decontamination, penetrates the skin.

  4. Diagnosis of Exposure to Chemical Warfare Agents: A Comprehensive Literature Survey 1990-2005

    Science.gov (United States)

    2006-01-01

    30S,02S," O2S, CH2 CH 2SCH3 CH 2CH2 SOCH 3 CH2 CH 2SCH 3 (2) (3) (10) Single stage GC-MS analysis, using positive ammonia CI and SIM of [M+NH 4]+, m...methodology, N7-HETE- Gua was detected in the spleen and liver of rats exposed percutaneously to sulfur mustard (Rao et al., 2002). b) Other physicochemical

  5. In Situ Probes of Capture and Decomposition of Chemical Warfare Agent Simulants by Zr-Based Metal Organic Frameworks

    Energy Technology Data Exchange (ETDEWEB)

    Plonka, Anna M.; Wang, Qi; Gordon, Wesley O.; Balboa, Alex; Troya, Diego; Guo, Weiwei; Sharp, Conor H.; Senanayake, Sanjaya D.; Morris, John R.; Hill, Craig L.; Frenkel, Anatoly I. (BNL); (Virginia Tech); (ECBC); (Emory); (SBU)

    2017-01-18

    Zr-based metal organic frameworks (MOFs) have been recently shown to be among the fastest catalysts of nerve-agent hydrolysis in solution. We report a detailed study of the adsorption and decomposition of a nerve-agent simulant, dimethyl methylphosphonate (DMMP), on UiO-66, UiO-67, MOF-808, and NU-1000 using synchrotron-based X-ray powder diffraction, X-ray absorption, and infrared spectroscopy, which reveals key aspects of the reaction mechanism. The diffraction measurements indicate that all four MOFs adsorb DMMP (introduced at atmospheric pressures through a flow of helium or air) within the pore space. In addition, the combination of X-ray absorption and infrared spectra suggests direct coordination of DMMP to the Zr6 cores of all MOFs, which ultimately leads to decomposition to phosphonate products. These experimental probes into the mechanism of adsorption and decomposition of chemical warfare agent simulants on Zr-based MOFs open new opportunities in rational design of new and superior decontamination materials.

  6. Efficient hydrolysis of the chemical warfare nerve agent tabun by recombinant and purified human and rabbit serum paraoxonase 1.

    Science.gov (United States)

    Valiyaveettil, Manojkumar; Alamneh, Yonas; Biggemann, Lionel; Soojhawon, Iswarduth; Doctor, Bhupendra P; Nambiar, Madhusoodana P

    2010-12-03

    Paraoxonase 1 (PON1) has been described as an efficient catalytic bioscavenger due to its ability to hydrolyze organophosphates (OPs) and chemical warfare nerve agents (CWNAs). It is the future most promising candidate as prophylactic medical countermeasure against highly toxic OPs and CWNAs. Most of the studies conducted so far have been focused on the hydrolyzing potential of PON1 against nerve agents, sarin, soman, and VX. Here, we investigated the hydrolysis of tabun by PON1 with the objective of comparing the hydrolysis potential of human and rabbit serum purified and recombinant human PON1. The hydrolysis potential of PON1 against tabun, sarin, and soman was evaluated by using an acetylcholinesterase (AChE) back-titration Ellman method. Efficient hydrolysis of tabun (100 nM) was observed with ∼25-40 mU of PON1, while higher concentration (80-250 mU) of the enzyme was required for the complete hydrolysis of sarin (11 nM) and soman (3 nM). Our data indicate that tabun hydrolysis with PON1 was ∼30-60 times and ∼200-260 times more efficient than that with sarin and soman, respectively. Moreover, the catalytic activity of PON1 varies from source to source, which also reflects their efficiency of hydrolyzing different types of nerve agents. Thus, efficient hydrolysis of tabun by PON1 suggests its promising potential as a prophylactic treatment against tabun exposure.

  7. Using Metal Complex Ion-Molecule Reactions in a Miniature Rectilinear Ion Trap Mass Spectrometer to Detect Chemical Warfare Agents

    Science.gov (United States)

    Graichen, Adam M.; Vachet, Richard W.

    2013-06-01

    The gas-phase reactions of a series of coordinatively unsaturated [Ni(L)n]y+ complexes, where L is a nitrogen-containing ligand, with chemical warfare agent (CWA) simulants in a miniature rectilinear ion trap mass spectrometer were investigated as part of a new approach to detect CWAs. Results show that upon entering the vacuum system via a poly(dimethylsiloxane) (PDMS) membrane introduction, low concentrations of several CWA simulants, including dipropyl sulfide (simulant for mustard gas), acetonitrile (simulant for the nerve agent tabun), and diethyl phosphite (simulant for nerve agents sarin, soman, tabun, and VX), can react with metal complex ions generated by electrospray ionization (ESI), thereby providing a sensitive means of detecting these compounds. The [Ni(L)n]2+ complexes are found to be particularly reactive with the simulants of mustard gas and tabun, allowing their detection at low parts-per-billion (ppb) levels. These detection limits are well below reported exposure limits for these CWAs, which indicates the applicability of this new approach, and are about two orders of magnitude lower than electron ionization detection limits on the same mass spectrometer. The use of coordinatively unsaturated metal complexes as reagent ions offers the possibility of further tuning the ion-molecule chemistry so that desired compounds can be detected selectively or at even lower concentrations.

  8. From energy-rich phosphate compounds to warfare agents: A review on the chemistry of organic phosphate compounds

    Directory of Open Access Journals (Sweden)

    Luciano Albino Giusti

    2008-12-01

    Full Text Available The chemistry of the phosphorus-oxygen bond is widely used in biological systems in many processes, such as energy transduction and the storage, transmission and expression of genetic information, which are essential to living beings in relation to a wide variety of functions. Compounds containing this bond have been designed for many purposes, ranging from agricultural defense systems, in order to increase food production, to nerve agents, for complaining use in warfare. In this review, features related to the chemistry of organic phosphate compounds are discussed, with particular emphasis on the role of phosphate compounds in biochemical events and in nerve agents. To this aim, the energy-rich phosphate compounds are focused, particularly the mode of their use as energy currency in cells. Historical and recent studies carried out by research groups have tried to elucidate the mechanism of action of enzymes responsible for energy transduction through the use of biochemical studies, enzyme models, and artificial enzymes. Finally, recent studies on the detoxification of nerve agents based on phosphorous esters are presented, and on the utilization of chromogenic and fluorogenic chemosensors for the detection of these phosphate species.

  9. Percutaneous sclerotherapy of pediatric lymphatic malformations: experience and outcomes according to the agent used.

    Science.gov (United States)

    Gallego Herrero, C; Navarro Cutillas, V

    Analyze statistically the success, number of sessions required and complete duration of treatment of agents used in pediatric percutaneous sclerotherapy of lymphatic malformations, to determine the most suitable. Retrospective study based on outcomes from percutaneous sclerotherapy performed on lymphatic malformations of 56 patients conducted by pediatric interventional radiologist for 14 years. As first approach, the procedure consists of ultrasound-guided introduction of sclerosing agent. Sessions were repeated until clinical resolution. Success, number of sessions and the duration of treatment were recorded and statistical treatment of the data was performed to obtain further conclusions. Lost patients in follow up and other minority agents used were excluded from the data. Eventually, 52 patients treated with OK432 (n=29), Ethibloc (n=5) and combination therapy (n=18) were included. The average number of sessions and duration in months of treatment was respectively 2.38 and 8.6 for OK432, 1.4 and 5.6 for Ethibloc, and 1.83 and 2.30 for dual therapy. The results were statistically significant for the difference in duration between OK432 and dual therapy. Also, 60-80% of patients reached proper results related to success, but the difference was no significant among the agents. Other demographic and anatomical variables were analyzed, not showing any difference, which supports the homogeneity of the sample. Despite of no significant difference in success and number of sessions among agents, longer duration of treatment with OK432 than dual therapy could mean greater health costs and probably greater disturb for patient and family. Copyright © 2017 SERAM. Publicado por Elsevier España, S.L.U. All rights reserved.

  10. Hemostatic agents for access tract in tubeless percutaneous nephrolithotomy: Is it worth?

    Science.gov (United States)

    Sepulveda, Francisco; Aliaga, Alfredo; Fleck, Daniela; Fernandez, Mario; Mercado, Alejandro; Vilches, Roberto; Moya, Francisco; Ledezma, Rodrigo; Reyes, Diego; Marchant, Fernando

    2016-01-01

    Introduction: The role of hemostatic agents as an adjunct for closure of the nephrostomy tract in tubeless percutaneous surgery (tubeless percutaneous nephrolithotomy [tPNL]) has been previously evaluated, observing a potential benefit in terms of reduced bleeding and urinary leakage. We assessed the rate of postoperative complications after the use of hemostatic agents for sealing the nephrostomy tract in patients undergoing tPNL at our institution. Subjects and Methods: We performed a retrospective analysis of 52 consecutive patients undergoing tPNL at our center between January 2010 and December 2013. No substance was placed within the tract in 25 patients (Group 1). A cylinder of Surgicel® in addition to 1 unit of Gelita® were placed within the access tract in 27 patients (Group 2). We accounted for demographic variables, stone size, operative time, postoperative pain, development of hematoma, postoperative hematocrit drop, urinary leakage, residual lithiasis, and hospital stay length. Results: Age and sex differed significantly between the two groups (P = 0.0002 and P = 0.048 respectively). However, there were no significant differences in terms of body mass index and stone burden. No significant differences between groups were found with regards to operative time, postoperative hematocrit drop, postoperative pain and presence of residual lithiasis. Conclusion: The use of Gelita® and Surgicel® as hemostatic agents in tPNL is safe, but we were not able to demonstrate any significant benefit in terms of postoperative morbidity after comparing the use of these agents in tPNL. We concluded that the uses of hemostatic agents needed to be evaluated in prospective randomized trials to define its benefits. PMID:27141194

  11. Toxin warfare agents:recognition molecules and drugs for control%生物毒素战剂:检测识别分子与防治药物

    Institute of Scientific and Technical Information of China (English)

    王景林

    2011-01-01

    There are various types of toxins in nature. However, these toxins. which are characterized by the ready availability, easy production and high toxicity, are likely biological warfare agents. Toxin warfare agents are different from traditional bacterial and viral agents or from chemical warfare agents in that they pose a great threat because of their diverse potency and the lack of efficacious drugs. Therefore, it is quite important to develop specific. sensitive recognition molecules for detection of toxins and drugs against intoxication caused by toxin agents. This review focuses on advances in recognition molecules of toxins and some drugs used as prevention and treatment hased on the characteristics of toxin warfare agents .%自然界中存在着种类繁多的毒素物质,但最有可能用作战剂的是那些获取方便、制备容易、毒性强、施放后可致人死亡或失能的毒素.毒素战剂既不同于传统的细菌、病毒战剂,也不同于化学毒剂,其最大的威胁来自它的高毒性及缺乏有效的治疗手段.因此,发展毒素战剂的检测识别分子与防治药物就显得尤为重要.本文讨论了生物毒素战剂相关概念、特征,重点综述了毒素战剂的检测识别分子与防治药物研究进展.

  12. Toxicity of the Organophosphate Chemical Warfare Agents GA, GB, and VX: Implications for Public Protection.

    OpenAIRE

    Munro, N

    1994-01-01

    The nerve agents, GA, GB, and VX are organophosphorus esters that form a major portion of the total agent volume contained in the U.S. stockpile of unitary chemical munitions. Congress has mandated the destruction of these agents, which is currently slated for completion in 2004. The acute, chronic, and delayed toxicity of these agents is reviewed in this analysis. The largely negative results from studies of genotoxicity, carcinogenicity, developmental, and reproductive toxicity are also pre...

  13. Fate of chemical warfare agents and toxic indutrial chemicals in landfills

    DEFF Research Database (Denmark)

    Bartelt-Hunt, D.L.; Barlaz, M.A.; Knappe, D.R.U.

    2006-01-01

    ) in MSW landfills was predicted with a mathematical model. Five blister agents [sulfur mustard (HD), nitrogen mustard (HN-2), lewisite (L), ethyldichloroarsine (ED), and phosgene oxime (CX)], eight nerve agents [tabun (GA), sarin (GB), soman (GD), GE, GF, VX, VG, and VM], one riot-control agent [CS...

  14. Direct quantification of chemical warfare agents and related compounds at low ppt levels: comparing active capillary dielectric barrier discharge plasma ionization and secondary electrospray ionization mass spectrometry.

    Science.gov (United States)

    Wolf, Jan-Christoph; Schaer, Martin; Siegenthaler, Peter; Zenobi, Renato

    2015-01-06

    A novel active capillary dielectric barrier discharge plasma ionization (DBDI) technique for mass spectrometry is applied to the direct detection of 13 chemical warfare related compounds, including sarin, and compared to secondary electrospray ionization (SESI) in terms of selectivity and sensitivity. The investigated compounds include an intact chemical warfare agent and structurally related molecules, hydrolysis products and/or precursors of highly toxic nerve agents (G-series, V-series, and "new" nerve agents), and blistering and incapacitating warfare agents. Well-defined analyte gas phase concentrations were generated by a pressure-assisted nanospray with consecutive thermal evaporation and dilution. Identification was achieved by selected reaction monitoring (SRM). The most abundant fragment ion intensity of each compound was used for quantification. For DBDI and SESI, absolute gas phase detection limits in the low ppt range (in MS/MS mode) were achieved for all compounds investigated. Although the sensitivity of both methods was comparable, the active capillary DBDI sensitivity was found to be dependent on the applied AC voltage, thus enabling direct tuning of the sensitivity and the in-source fragmentation, which may become a key feature in terms of field applicability. Our findings underline the applicability of DBDI and SESI for the direct, sensitive detection and quantification of several CWA types and their degradation products. Furthermore, they suggest the use of DBDI in combination with hand-held instruments for CWAs on-site monitoring.

  15. Transport behavior of surrogate biological warfare agents in a simulated landfill: Effect of leachate recirculation and water infiltration

    KAUST Repository

    Saikaly, Pascal

    2010-11-15

    An understanding of the transport behavior of biological warfare (BW) agents in landfills is required to evaluate the suitability of landfills for the disposal of building decontamination residue (BDR) following a bioterrorist attack on a building. Surrogate BW agents, Bacillus atrophaeus spores and Serratia marcescens, were spiked into simulated landfill reactors that were filled with synthetic building debris (SBD) and operated for 4 months with leachate recirculation or water infiltration. Quantitative polymerase chain reaction (Q-PCR) was used to monitor surrogate transport. In the leachate recirculation reactors, <10% of spiked surrogates were eluted in leachate over 4 months. In contrast, 45% and 31% of spiked S. marcescens and B. atrophaeus spores were eluted in leachate in the water infiltration reactors. At the termination of the experiment, the number of retained cells and spores in SBD was measured over the depth of the reactor. Less than 3% of the total spiked S. marcescens cells and no B. atrophaeus spores were detected in SBD. These results suggest that significant fractions of the spiked surrogates were strongly attached to SBD. © 2010 American Chemical Society.

  16. Continuum Model for Decontamination of Chemical Warfare Agent from a Rubbery Polymer using the Maxwell-Stefan Formulation

    Science.gov (United States)

    Varady, Mark; Bringuier, Stefan; Pearl, Thomas; Stevenson, Shawn; Mantooth, Brent

    Decontamination of polymers exposed to chemical warfare agents (CWA) often proceeds by application of a liquid solution. Absorption of some decontaminant components proceed concurrently with extraction of the CWA, resulting in multicomponent diffusion in the polymer. In this work, the Maxwell-Stefan equations were used with the Flory-Huggins model of species activity to mathematically describe the transport of two species within a polymer. This model was used to predict the extraction of the nerve agent O-ethyl S-[2(diisopropylamino)ethyl] methylphosphonothioate (VX) from a silicone elastomer into both water and methanol. Comparisons with experimental results show good agreement with minimal fitting of model parameters from pure component uptake data. Reaction of the extracted VX with sodium hydroxide in the liquid-phase was also modeled and used to predict the overall rate of destruction of VX. Although the reaction proceeds more slowly in the methanol-based solution compared to the aqueous solution, the extraction rate is faster due to increasing VX mobility as methanol absorbs into the silicone, resulting in an overall faster rate of VX destruction.

  17. Semi-continuous high speed gas analysis of generated vapors of chemical warfare agents

    NARCIS (Netherlands)

    Trap, H.C.; Langenberg, J.P.

    1999-01-01

    A method is presented for the continuous analysis of generated vapors of the nerve agents soman and satin and the blistering agent sulfur mustard. By using a gas sampling valve and a very short (15 cm) column connected to an on-column injector with a 'standard length' column, the system can either

  18. The application of single particle aerosol mass spectrometry for the detection and identification of high explosives and chemical warfare agents

    Energy Technology Data Exchange (ETDEWEB)

    Martin, Audrey Noreen [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2006-01-01

    Single Particle Aerosol Mass Spectrometry (SPAMS) was evaluated as a real-time detection technique for single particles of high explosives. Dual-polarity time-of-flight mass spectra were obtained for samples of 2,4,6-trinitrotoluene (TNT), 1,3,5-trinitro-1,3,5-triazinane (RDX), and pentaerythritol tetranitrate (PETN); peaks indicative of each compound were identified. Composite explosives, Comp B, Semtex 1A, and Semtex 1H were also analyzed, and peaks due to the explosive components of each sample were present in each spectrum. Mass spectral variability with laser fluence is discussed. The ability of the SPAMS system to identify explosive components in a single complex explosive particle (~1 pg) without the need for consumables is demonstrated. SPAMS was also applied to the detection of Chemical Warfare Agent (CWA) simulants in the liquid and vapor phases. Liquid simulants for sarin, cyclosarin, tabun, and VX were analyzed; peaks indicative of each simulant were identified. Vapor phase CWA simulants were adsorbed onto alumina, silica, Zeolite, activated carbon, and metal powders which were directly analyzed using SPAMS. The use of metal powders as adsorbent materials was especially useful in the analysis of triethyl phosphate (TEP), a VX stimulant, which was undetectable using SPAMS in the liquid phase. The capability of SPAMS to detect high explosives and CWA simulants using one set of operational conditions is established.

  19. Decomposition of 2-chloroethylethylsulfide on copper oxides to detoxify polymer-based spherical activated carbons from chemical warfare agents.

    Science.gov (United States)

    Fichtner, S; Hofmann, J; Möller, A; Schrage, C; Giebelhausen, J M; Böhringer, B; Gläser, R

    2013-11-15

    For the decomposition of chemical warfare agents, a hybrid material concept was applied. This consists of a copper oxide-containing phase as a component with reactive functionality supported on polymer-based spherical activated carbon (PBSAC) as a component with adsorptive functionality. A corresponding hybrid material was prepared by impregnation of PBSAC with copper(II)nitrate and subsequent calcination at 673K. The copper phase exists predominantly as copper(I)oxide which is homogeneously distributed over the PBSAC particles. The hybrid material containing 16 wt.% copper on PBSAC is capable of self-detoxifying the mustard gas surrogate 2-chloroethylethylsulfide (CEES) at room temperature. The decomposition is related to the breakthrough behavior of the reactant CEES, which displaces the reaction product ethylvinylsulfide (EVS). This leads to a combined breakthrough of CEES and EVS. The decomposition of CEES is shown to occur catalytically over the copper-containing PBSAC material. Thus, the hybrid material can even be considered to be self-cleaning.

  20. Facility monitoring of chemical warfare agent simulants in air using an automated, field-deployable, miniature mass spectrometer.

    Science.gov (United States)

    Smith, Jonell N; Noll, Robert J; Cooks, R Graham

    2011-05-30

    Vapors of four chemical warfare agent (CWA) stimulants, 2-chloroethyl ethyl sulfide (CEES), diethyl malonate (DEM), dimethyl methylphosphonate (DMMP), and methyl salicylate (MeS), were detected, identified, and quantitated using a fully automated, field-deployable, miniature mass spectrometer. Samples were ionized using a glow discharge electron ionization (GDEI) source, and ions were mass analyzed with a cylindrical ion trap (CIT) mass analyzer. A dual-tube thermal desorption system was used to trap compounds on 50:50 Tenax TA/Carboxen 569 sorbent before their thermal release. The sample concentrations ranged from low parts per billion [ppb] to two parts per million [ppm]. Limits of detection (LODs) ranged from 0.26 to 5.0 ppb. Receiver operating characteristic (ROC) curves are presented for each analyte. A sample of CEES at low ppb concentration was combined separately with two interferents, bleach (saturated vapor) and diesel fuel exhaust (1%), as a way to explore the capability of detecting the simulant in an environmental matrix. Also investigated was a mixture of the four CWA simulants (at concentrations in air ranging from 270 to 380 ppb). Tandem mass (MS/MS) spectral data were used to identify and quantify the individual components. Copyright © 2011 John Wiley & Sons, Ltd.

  1. Express analysis of explosives, chemical warfare agents and drugs with multicapillary column gas chromatography and ion mobility increment spectrometry.

    Science.gov (United States)

    Buryakov, Igor A

    2004-02-05

    Description of a gas chromatograph designed for express analysis of explosives (2,4-dinitrotoluene, 2,4,6-trinitrotoluene, pentaerythritol tetranitrate), chemical warfare agents (mustard gas, lewisite, sarin) and drugs (heroin, cocaine hydrochloride, crack) is given. The devices comprises a multicapillary chromatographic column and an ion mobility increment spectrometer (MCC-IMIS). The main analytical characteristics of an IMIS (estimated detection limit (DL), linear dynamic range (LDR), speed of response) and a chromatographic column (separation power, degree of separation, a number of possible peaks at a chromatogram section, divided by analysis time) are determined. The maximum value of DL equal to 5 pg/ml was registered for cis-alpha-LW, and the lowest one of 0.001 pg/ml was for cocaine. The maximum value of LDR equal to 1000 was registered for sarin and the lowest one of 150 was for the ions of lewisite. Speed of response of one compound detection with the IMIS was 0.7 s.

  2. Detection of chemical warfare agent-related phenylarsenic compounds in marine biota samples by LC-HESI/MS/MS.

    Science.gov (United States)

    Niemikoski, Hanna; Soderstrom, Martin; Vanninen, Paula

    2017-09-06

    A new method has been developed to determine oxidation products of three chemical warfare agent (CWA) related phenylarsenic compounds from marine biota samples by a liquid chromatography-heated electrospray ioniza-tion/tandem mass spectrometry (LC-HESI/MS/MS). The target chemicals were oxidation products of Adamsite (DM[ox]), Clark I (DA[ox]), and triphenylarsine (TPA[ox]). Method was validated within the concentration range of 1-5 ng/g, 0.2-5 ng/g and 0.2-5 ng/g for DM[ox], DA[ox] and TPA[ox], respectively. The method was linear, precise and accurate. Limits of quantification (LOQ) were 2.0, 1.3 and 2.1 ng/g for DM[ox], DA[ox] and TPA[ox], respectively. A total of ten fish samples and one lobster sample collected from near Swedish coast, Måseskär dumpsite were analysed. Trace concentrations below LOQ values were detected in three samples and the elemental composition of oxidized form of Clark I and /or II was con-firmed by LC-HESI/HRMS. To our knowledge, this is the first study that provides the presence of CWA related chemicals in marine biota samples.

  3. Cutaneous challenge with chemical warfare agents in the SKH-1 hairless mouse (II): effects of some currently used skin decontaminants (RSDL and Fuller's earth) against liquid sulphur mustard and VX exposure.

    Science.gov (United States)

    Taysse, L; Dorandeu, F; Daulon, S; Foquin, A; Perrier, N; Lallement, G; Breton, P

    2011-06-01

    Using the hairless mouse screening model presented in the companion paper(1) the aim of this study was to assess two skin decontaminating systems: Fuller's earth (FE) and Reactive Skin Decontamination Lotion (RSDL) against two extremely toxic chemical warfare agents that represent a special percutaneous hazard, sulphur mustard (SM) and O-ethyl-S-(2[di-isopropylamino]ethyl)methyl-phosphonothioate (VX). Five minutes after being exposed on the back to either 2 µL of neat sulphur mustard or 50 µg.kg(-1) of diluted VX, mice were decontaminated. Both systems were able to reduce blisters 3 days after SM exposure. However, RSDL was found to be more efficient than FE in reducing the necrosis of the epidermis and erosion. In the case of VX exposure, RSDL, whatever the ratio of decontaminant to toxicant used (RSDL 10, 20, 50), was not able to sufficiently prevent the inhibition of plasma cholinesterases taken as a surrogate marker of exposure and toxicity. Only FE reduced significantly the ChE inhibition. Some of these observations are different from our previous results obtained in domestic swine and these changes are thus discussed in the perspective of using SKH-1 hairless mice for the initial in vivo screening of decontaminants.

  4. Dermostyx (IB1) - High efficacy and safe topical skin protectant against percutaneous toxic agents.

    Science.gov (United States)

    Dachir, Shlomit; Barness, Izhak; Fishbine, Eliezer; Meshulam, Jacob; Sahar, Rita; Eisenkraft, Arik; Amir, Adina; Kadar, Tamar

    2017-04-01

    Prevention of the penetration of toxic agents through the skin is crucial for both military troops and civilian populations. We have developed a novel topical skin protectant (TSP), coded as IB1 and commercially available as Dermostyx protective solution (Rekah Pharm, Israel). The formulation afforded significant protection against chemical warfare agents such as sulfur mustard (SM) and VX (2LD50), pesticides such as parathion and irritants such as acrolein. The efficacy of the protectant was evaluated in the pig model using clinical, histological and biochemical monitoring. A single topical application prior to exposure to the toxic agents reduced significantly the size and severity of skin lesions and ameliorated or prevented systemic clinical symptoms. The barrier properties of IB1 are immediate upon application and remain effective for at least 12 h. It is absorbed into the stratum corneum of the skin and remains there until rinsing with water, yet the ingredients are not absorbed into the body. The formulation is a hydrophilic water-based solution, composed of magnesium sulfate and glycerin that are widely used in cosmetic and medicine, and was shown to be safe in preclinical and in Phase I clinical studies. The suggested mode of action is based on the unique interaction of glycerin with the stratum corneum, changing its properties to hydrophilic and on the "salting out" effect of magnesium sulfate. The expected use of the TSP is by application on exposed skin areas and sensitive skin sites (e.g. armpits, groin, waist), when necessary. A quantity of 10 ml is sufficient for one application covering approximately 20% of the body surface area. The formulation was approved for human use by the Israel Ministry of Health and a CE mark certificate in Europe has been recently issued (Class I). Dermostyx has been adopted by the IDF and first responders as a skin protectant for special needs.

  5. Facile hydrolysis-based chemical destruction of the warfare agents VX, GB, and HD by alumina-supported fluoride reagents.

    Science.gov (United States)

    Gershonov, E; Columbus, I; Zafrani, Y

    2009-01-02

    A facile solvent-free hydrolysis (chemical destruction) of the warfare agents VX (O-ethyl S-2-(diisopropylamino)ethyl methylphosphonothioate), GB (O-isopropyl methylphosphonofluoridate or sarin), and HD (2,2'-dichloroethyl sulfide or sulfur mustard) upon reaction with various solid-supported fluoride reagents is described. These solid reagents include different alumina-based powders such as KF/Al(2)O(3), AgF/KF/Al(2)O(3), and KF/Al(2)O(3) enriched by so-called coordinatively unsaturated fluoride ions (termed by us as ECUF-KF/Al(2)O(3)). When adsorbed on these sorbents, the nerve agent VX quickly hydrolyzed (t(1/2) range between 0.1-6.3 h) to the corresponding nontoxic phosphonic acid EMPA as a major product (>90%) and to the relatively toxic desethyl-VX (<10%). The latter byproduct was further hydrolyzed to the nontoxic MPA product (t(1/2) range between 2.2-161 h). The reaction rates and the product distribution were found to be strongly dependent on the nature of the fluoride ions in the KF/Al(2)O(3) matrix and on its water content. All variations of the alumina-supported fluoride reagents studied caused an immediate hydrolysis of the highly toxic GB (t(1/2) < 10 min) to form the corresponding nontoxic phosphonic acid IMPA. A preliminary study of the detoxification of HD on these catalyst supports showed the formation of the nontoxic 1,4-thioxane as a major product together with minor amounts of TDG and vinylic compounds within a few days. The mechanisms and the efficiency of these processes were successfully studied by solid-state (31)P, (13)C, and (19)F MAS NMR.

  6. Autonomous-agent based simulation of anti-submarine warfare operations with the goal of protecting a high value unit

    OpenAIRE

    Akbori, Fahrettin

    2004-01-01

    Approved for public release, distribution unlimited The Anti-Submarine Warfare screen design simulation is a program that provides a model for operations in anti-submarine warfare (ASW). The purpose of the program is to aid ASW commanders, allowing them to configure an ASW screen, including the sonar policy, convoy speed, and the number of ships, to gain insight into how these and other factors beyond their control, such as water conditions, impact ASW effectiveness. It is also designed to...

  7. Chicken cathelicidin-2-derived peptides with enhanced immunomodulatory and antibacterial activities against biological warfare agents

    NARCIS (Netherlands)

    Molhoek, E.M.; van Dijk, A.; Veldhuizen, E.J.A.; Dijk-Knijnenburg, H.; Mars-Groenendijk, R.H.; Boele, L.C.L.; Kaman, W.E.; Haagsman, H.P.; Bikker, F.J.

    2010-01-01

    Host defence peptides (HDPs) are considered to be excellent candidates for the development of novel therapeutic agents. Recently, it was demonstrated that the peptide C1-15, an N-terminal segment of chicken HDP cathelicidin-2, exhibits potent antibacterial activity while lacking cytotoxicity towards

  8. Chicken cathelicidin-2-derived peptides with enhanced immunomodulatory and antibacterial activities against biological warfare agents

    NARCIS (Netherlands)

    Molhoek, E.M.; Dijk, A. van; Veldhuizen, E.J.A.; Dijk-Knijnenburg, H.; Mars-Groenendijk, R.H.; Boele, L.C.L.; Kaman-van Zanten, W.E.; Haagsman, H.P.; Bikker, F.J.

    2010-01-01

    Host defence peptides (HDPs) are considered to be excellent candidates for the development of novel therapeutic agents. Recently, it was demonstrated that the peptide C1-15, an N-terminal segment of chicken HDP cathelicidin-2, exhibits potent antibacterial activity while lacking cytotoxicity towards

  9. Enzymatic Neutralization of the Chemical Warfare Agent VX: Evolution of Phosphotriesterase for Phosphorothiolate Hydrolysis

    OpenAIRE

    Bigley, Andrew N.; Xu, Chengfu; Henderson, Terry J.; Steven P. Harvey; Raushel, Frank M.

    2013-01-01

    The V-type nerve agents (VX and VR) are among the most toxic substances known. The high toxicity and environmental persistence of VX makes the development of novel decontamination methods particularly important. The enzyme phosphotriesterase (PTE) is capable of hydrolyzing VX but with an enzymatic efficiency more than 5-orders of magnitude lower than with its best substrate, paraoxon. PTE has previously proven amenable to directed evolution for the improvement of catalytic activity against se...

  10. Ion mobility spectrometric analysis of vaporous chemical warfare agents by the instrument with corona discharge ionization ammonia dopant ambient temperature operation.

    Science.gov (United States)

    Satoh, Takafumi; Kishi, Shintaro; Nagashima, Hisayuki; Tachikawa, Masumi; Kanamori-Kataoka, Mieko; Nakagawa, Takao; Kitagawa, Nobuyoshi; Tokita, Kenichi; Yamamoto, Soichiro; Seto, Yasuo

    2015-03-20

    The ion mobility behavior of nineteen chemical warfare agents (7 nerve gases, 5 blister agents, 2 lachrymators, 2 blood agents, 3 choking agents) and related compounds including simulants (8 agents) and organic solvents (39) was comparably investigated by the ion mobility spectrometry instrument utilizing weak electric field linear drift tube with corona discharge ionization, ammonia doping, purified inner air drift flow circulation operated at ambient temperature and pressure. Three alkyl methylphosphonofluoridates, tabun, and four organophosphorus simulants gave the intense characteristic positive monomer-derived ion peaks and small dimer-derived ion peaks, and the later ion peaks were increased with the vapor concentrations. VX, RVX and tabun gave both characteristic positive monomer-derived ions and degradation product ions. Nitrogen mustards gave the intense characteristic positive ion peaks, and in addition distinctive negative ion peak appeared from HN3. Mustard gas, lewisite 1, o-chlorobenzylidenemalononitrile and 2-mercaptoethanol gave the characteristic negative ion peaks. Methylphosphonyl difluoride, 2-chloroacetophenone and 1,4-thioxane gave the characteristic ion peaks both in the positive and negative ion mode. 2-Chloroethylethylsulfide and allylisothiocyanate gave weak ion peaks. The marker ion peaks derived from two blood agents and three choking agents were very close to the reactant ion peak in negative ion mode and the respective reduced ion mobility was fluctuated. The reduced ion mobility of the CWA monomer-derived peaks were positively correlated with molecular masses among structurally similar agents such as G-type nerve gases and organophosphorus simulants; V-type nerve gases and nitrogen mustards. The slope values of the calibration plots of the peak heights of the characteristic marker ions versus the vapor concentrations are related to the detection sensitivity, and within chemical warfare agents examined the slope values for sarin, soman

  11. Enzymatic neutralization of the chemical warfare agent VX: evolution of phosphotriesterase for phosphorothiolate hydrolysis.

    Science.gov (United States)

    Bigley, Andrew N; Xu, Chengfu; Henderson, Terry J; Harvey, Steven P; Raushel, Frank M

    2013-07-17

    The V-type nerve agents (VX and VR) are among the most toxic substances known. The high toxicity and environmental persistence of VX make the development of novel decontamination methods particularly important. The enzyme phosphotriesterase (PTE) is capable of hydrolyzing VX but with an enzymatic efficiency more than 5 orders of magnitude lower than with its best substrate, paraoxon. PTE has previously proven amenable to directed evolution for the improvement of catalytic activity against selected compounds through the manipulation of active-site residues. Here, a series of sequential two-site mutational libraries encompassing 12 active-site residues of PTE was created. The libraries were screened for catalytic activity against a new VX analogue, DEVX, which contains the same thiolate leaving group of VX coupled to a diethoxyphosphate core rather than the ethoxymethylphosphonate core of VX. The evolved catalytic activity with DEVX was enhanced 26-fold relative to wild-type PTE. Further improvements were facilitated by targeted error-prone PCR mutagenesis of loop-7, and additional PTE variants were identified with up to a 78-fold increase in the rate of DEVX hydrolysis. The best mutant hydrolyzed the racemic nerve agent VX with a value of kcat/Km = 7 × 10(4) M(-1) s(-1), a 230-fold improvement relative to wild-type PTE. The highest turnover number achieved by the mutants created for this investigation was 137 s(-1), an enhancement of 152-fold relative to wild-type PTE. The stereoselectivity for the hydrolysis of the two enantiomers of VX was relatively low. These engineered mutants of PTE are the best catalysts ever reported for the hydrolysis of nerve agent VX.

  12. Status of miniature integrated UV resonance fluorescence and Raman sensors for detection and identification of biochemical warfare agents

    Science.gov (United States)

    Hug, William F.; Bhartia, Rohit; Taspin, Alexandre; Lane, Arthur; Conrad, Pamela; Sijapati, Kripa; Reid, Ray D.

    2005-11-01

    Laser induced native fluorescence (LINF) is the most sensitive method of detection of biological material including microorganisms, virus', and cellular residues. LINF is also a sensitive method of detection for many non-biological materials as well. The specificity with which these materials can be classified depends on the excitation wavelength and the number and location of observation wavelengths. Higher levels of specificity can be obtained using Raman spectroscopy but a much lower levels of sensitivity. Raman spectroscopy has traditionally been employed in the IR to avoid fluorescence. Fluorescence rarely occurs at wavelength below about 270nm. Therefore, when excitation occurs at a wavelength below 250nm, no fluorescence background occurs within the Raman fingerprint region for biological materials. When excitation occurs within electronic resonance bands of the biological target materials, Raman signal enhancement over one million typically occurs. Raman sensitivity within several hundred times fluorescence are possible in the deep UV where most biological materials have strong absorption. Since the Raman and fluorescence emissions occur at different wavelength, both spectra can be observed simultaneously, thereby providing a sensor with unique sensitivity and specificity capability. We will present data on our integrated, deep ultraviolet, LINF/Raman instruments that are being developed for several applications including life detection on Mars as well as biochemical warfare agents on Earth. We will demonstrate the ability to discriminate organic materials based on LINF alone. Together with UV resonance Raman, higher levels of specificity will be demonstrated. In addition, these instruments are being developed as on-line chemical sensors for industrial and municipal waste streams and product quality applications.

  13. Handheld and mobile hyperspectral imaging sensors for wide-area standoff detection of explosives and chemical warfare agents

    Science.gov (United States)

    Gomer, Nathaniel R.; Gardner, Charles W.; Nelson, Matthew P.

    2016-05-01

    Hyperspectral imaging (HSI) is a valuable tool for the investigation and analysis of targets in complex background with a high degree of autonomy. HSI is beneficial for the detection of threat materials on environmental surfaces, where the concentration of the target of interest is often very low and is typically found within complex scenery. Two HSI techniques that have proven to be valuable are Raman and shortwave infrared (SWIR) HSI. Unfortunately, current generation HSI systems have numerous size, weight, and power (SWaP) limitations that make their potential integration onto a handheld or field portable platform difficult. The systems that are field-portable do so by sacrificing system performance, typically by providing an inefficient area search rate, requiring close proximity to the target for screening, and/or eliminating the potential to conduct real-time measurements. To address these shortcomings, ChemImage Sensor Systems (CISS) is developing a variety of wide-field hyperspectral imaging systems. Raman HSI sensors are being developed to overcome two obstacles present in standard Raman detection systems: slow area search rate (due to small laser spot sizes) and lack of eye-safety. SWIR HSI sensors have been integrated into mobile, robot based platforms and handheld variants for the detection of explosives and chemical warfare agents (CWAs). In addition, the fusion of these two technologies into a single system has shown the feasibility of using both techniques concurrently to provide higher probability of detection and lower false alarm rates. This paper will provide background on Raman and SWIR HSI, discuss the applications for these techniques, and provide an overview of novel CISS HSI sensors focused on sensor design and detection results.

  14. Real-time, wide-area hyperspectral imaging sensors for standoff detection of explosives and chemical warfare agents

    Science.gov (United States)

    Gomer, Nathaniel R.; Tazik, Shawna; Gardner, Charles W.; Nelson, Matthew P.

    2017-05-01

    Hyperspectral imaging (HSI) is a valuable tool for the detection and analysis of targets located within complex backgrounds. HSI can detect threat materials on environmental surfaces, where the concentration of the target of interest is often very low and is typically found within complex scenery. Unfortunately, current generation HSI systems have size, weight, and power limitations that prohibit their use for field-portable and/or real-time applications. Current generation systems commonly provide an inefficient area search rate, require close proximity to the target for screening, and/or are not capable of making real-time measurements. ChemImage Sensor Systems (CISS) is developing a variety of real-time, wide-field hyperspectral imaging systems that utilize shortwave infrared (SWIR) absorption and Raman spectroscopy. SWIR HSI sensors provide wide-area imagery with at or near real time detection speeds. Raman HSI sensors are being developed to overcome two obstacles present in standard Raman detection systems: slow area search rate (due to small laser spot sizes) and lack of eye-safety. SWIR HSI sensors have been integrated into mobile, robot based platforms and handheld variants for the detection of explosives and chemical warfare agents (CWAs). In addition, the fusion of these two technologies into a single system has shown the feasibility of using both techniques concurrently to provide higher probability of detection and lower false alarm rates. This paper will provide background on Raman and SWIR HSI, discuss the applications for these techniques, and provide an overview of novel CISS HSI sensors focusing on sensor design and detection results.

  15. Heme-Containing Metal-Organic Frameworks for the Oxidative Degradation of Chemical Warfare Agents

    Science.gov (United States)

    2016-04-14

    reflectance UV / visible spectroscopy illustrating the reaction of PCNF2-224 (blue trace) with O3 at −40 °C to from PCNF2-224FeIVO (red trace). Figure 6...PI: T. David Harris results in the formation of new species with a distinct UV / Visible spectrum, consistent with the formation of the...solution of THF and an excess of the strong reducing agent, NaC10H8 results in a UV / Visible spectrum distinct from both the ferrous state and the one

  16. Decontamination of Chemical/Biological Warfare (CBW) Agents Using an Atmospheric Pressure Plasma Jet (APPJ)

    Science.gov (United States)

    Herrmann, Hans W.

    1998-11-01

    The atmospheric pressure plasma jet (APPJ) is a non-thermal, high pressure, uniform glow discharge that produces a high velocity effluent stream of highly reactive chemical species. The discharge operates on a feedstock gas (e.g. He/O_2/H_2O) which flows between an outer, grounded, cylindrical electrode and an inner, coaxial electrode powered at 13.56 MHz RF. While passing through the plasma, the feedgas becomes excited, dissociated or ionized by electron impact. Once the gas exits the discharge volume, ions and electrons are rapidly lost by recombination, but the fast-flowing effluent still contains metastables (e.g. O2*, He*) and radicals (e.g. O, OH). These reactive species have been shown to be effective neutralizers of surrogates for anthrax spores, mustard blister agent and VX nerve gas. Unlike conventional, wet decontamination methods, the plasma effluent does not cause corrosion of most surfaces and does not damage wiring, electronics, nor most plastics. This makes it highly suitable for decontamination of high value sensitive equipment such as is found in vehicle interiors (i.e. tanks, planes...) for which there is currently no good decontamination technique. Furthermore, the reactive species rapidly degrade into harmless products leaving no lingering residue or harmful byproducts. Physics of the APPJ will be discussed and results of surface decontamination experiments using simulant and actual CBW agents will be presented.

  17. Cerium oxide for the destruction of chemical warfare agents: A comparison of synthetic routes

    Energy Technology Data Exchange (ETDEWEB)

    Janoš, Pavel, E-mail: pavel.janos@ujep.cz [Faculty of the Environment, University of Jan Evangelista Purkyně, Králova Výšina 7, 400 96 Ústí nad Labem (Czech Republic); Henych, Jiří [Faculty of the Environment, University of Jan Evangelista Purkyně, Králova Výšina 7, 400 96 Ústí nad Labem (Czech Republic); Institute of Inorganic Chemistry AS CR v.v.i., 25068 Řež (Czech Republic); Pelant, Ondřej; Pilařová, Věra; Vrtoch, Luboš [Faculty of the Environment, University of Jan Evangelista Purkyně, Králova Výšina 7, 400 96 Ústí nad Labem (Czech Republic); Kormunda, Martin [Faculty of Sciences, University of Jan Evangelista Purkyně, České Mládeže 8, 400 96 Ústí nad Labem (Czech Republic); Mazanec, Karel [Military Research Institute, Veslařská 230, 637 00 Brno (Czech Republic); and others

    2016-03-05

    Highlights: • Four synthetic routes were compared to prepare the nanoceria-based reactive sorbents. • The sorbents prepared by homogeneous hydrolysis destroy efficiently the soman and VX nerve agents. • Toxic organophosphates are converted to less-dangerous products completely within a few minutes. • Surface non-stoichiometry and −OH groups promote the destruction by the S{sub N}2 mechanism. - Abstract: Four different synthetic routes were used to prepare active forms of cerium oxide that are capable of destroying toxic organophosphates: a sol–gel process (via a citrate precursor), homogeneous hydrolysis and a precipitation/calcination procedure (via carbonate and oxalate precursors). The samples prepared via homogeneous hydrolysis with urea and the samples prepared via precipitation with ammonium bicarbonate (with subsequent calcination at 500 °C in both cases) exhibited the highest degradation efficiencies towards the extremely dangerous nerve agents soman (O-pinacolyl methylphosphonofluoridate) and VX (O-ethyl S-[2-(diisopropylamino)ethyl] methylphosphonothioate) and the organophosphate pesticide parathion methyl. These samples were able to destroy more than 90% of the toxic compounds in less than 10 min. The high degradation efficiency of cerium oxide is related to its complex surface chemistry (presence of surface −OH groups and surface non-stoichiometry) and to its nanocrystalline nature, which promotes the formation of crystal defects on which the decomposition of organophosphates proceeds through a nucleophilic substitution mechanism that is not dissimilar to the mechanism of enzymatic hydrolysis of organic phosphates by phosphotriesterase.

  18. Environmental toxicity of Chemical Warfare Agents (CWAs) - MicrotoxTM and Spontaneous Locomotor Changes

    DEFF Research Database (Denmark)

    Storgaard, Morten Swayne; Sanderson, Hans; Baatrup, Erik

    After the 2nd World War the CWAs were prohibited by law and 11,000 tonnes of toxic agents were dumped in the Bornholm Basin east of Bornholm. The dumped chemical munitions have not reached attention from politicians and scientists until recently. During earlier projects, such as MERCW (2005...... to be illuminated in which this study hopefully will contribute to. Especially, chronic toxicity needs to be described as this mimics a more environmentally realistic situation. One or two compounds will be accessed based upon various factors such as detection frequencies, found concentrations in both sediment...... to the commercially important cod (Gadus morrhua). The cod migrates down to the seafloor – even crossing the oxycline - where the CWA munitions were dumped. To sum up, this study will obtain novel ecotoxicity data on recently discovered degradation products and assess the potential threat to the commercially...

  19. Variants of Phosphotriesterase for the Enhanced Detoxification of the Chemical Warfare Agent VR.

    Science.gov (United States)

    Bigley, Andrew N; Mabanglo, Mark F; Harvey, Steven P; Raushel, Frank M

    2015-09-08

    The V-type organophosphorus nerve agents are among the most hazardous compounds known. Previous efforts to evolve the bacterial enzyme phosphotriesterase (PTE) for the hydrolytic decontamination of VX resulted in the identification of the variant L7ep-3a, which has a kcat value more than 2 orders of magnitude higher than that of wild-type PTE for the hydrolysis of VX. Because of the relatively small size of the O-ethyl, methylphosphonate center in VX, stereoselectivity is not a major concern. However, the Russian V-agent, VR, contains a larger O-isobutyl, methylphosphonate center, making stereoselectivity a significant issue since the SP-enantiomer is expected to be significantly more toxic than the RP-enantiomer. The three-dimensional structure of the L7ep-3a variant was determined to a resolution of 2.01 Å (PDB id: 4ZST ). The active site of the L7ep-3a mutant has revealed a network of hydrogen bonding interactions between Asp-301, Tyr-257, Gln-254, and the hydroxide that bridges the two metal ions. A series of new analogues that mimic VX and VR has helped to identify critical structural features for the development of new enzyme variants that are further enhanced for the catalytic detoxification of VR and VX. The best of these mutants has been shown to have a reversed stereochemical preference for the hydrolysis of VR-chiral center analogues. This mutant hydrolyzes the two enantiomers of VR 160- and 600-fold faster than wild-type PTE hydrolyzes the SP-enantiomer of VR.

  20. Decontamination of chemical warfare sulfur mustard agent simulant by ZnO nanoparticles

    Science.gov (United States)

    Sadeghi, Meysam; Yekta, Sina; Ghaedi, Hamed

    2016-07-01

    In this study, zinc oxide nanoparticles (ZnO NPs) have been surveyed to decontaminate the chloroethyl phenyl sulfide as a sulfur mustard agent simulant. Prior to the reaction, ZnO NPs were successfully prepared through sol-gel method in the absence and presence of polyvinyl alcohol (PVA). PVA was utilized as a capping agent to control the agglomeration of the nanoparticles. The formation, morphology, elemental component, and crystalline size of nanoscale ZnO were certified and characterized by SEM/EDX, XRD, and FT-IR techniques. The decontamination (adsorption and destruction) was tracked by the GC-FID analysis, in which the effects of polarity of the media, such as isopropanol, acetone and n-hexane, reaction time intervals from 1 up to 18 h, and different temperatures, including 25, 35, 45, and 55 °C, on the catalytic/decontaminative capability of the surface of ZnO NPs/PVA were investigated and discussed, respectively. Results demonstrated that maximum decontamination (100 %) occurred in n-hexane solvent at 55 °C after 1 h. On the other hand, the obtained results for the acetone and isopropanol solvents were lower than expected. GC-MS chromatograms confirmed the formation of hydroxyl ethyl phenyl sulfide and phenyl vinyl sulfide as the destruction reaction products. Furthermore, these chromatograms proved the role of hydrolysis and elimination mechanisms on the catalyst considering its surface Bronsted and Lewis acid sites. A non-polar solvent aids material transfer to the reactive surface acid sites without blocking these sites.

  1. Capillary zone electrophoresis analysis and detection of mid-spectrum biological warfare agents

    Energy Technology Data Exchange (ETDEWEB)

    Boulet, C.A.; Townsley, C.

    1995-04-01

    DRE Suffield has initiated a research program to develop methods and equipment for field detection and laboratory identification of mid-spectrum agents, molecules of biological origin such as proteins, peptides and toxins. In this study, a highly efficient and reproducible capillary zone electrophoresis method was developed to separate and identify a series of nine peptides of defence interest: bradykinin, bradykinin fragment 1-5, substance P,ARG8-vasopressin, luteinizing hormone releasing hormone, bombesin, leucine enkephalin, methionine enkephalin, and oxytocin. Using a 50 micrometer x 47 cm capillary column, 22.5 kV separation voltage and a 100 mM pH 2.5 phosphate buffer, all nine peptide could separated in under 10 minutes. Three strategies, which could be used in a fully automated field detection and identification system, were demonstrated for the identification of unknown peptides: comparison of migration times, comparison of electrophoretic mobilities, and co-injection of multiple reference standards. These experiments demonstrate that a separation based analytical method such as capillary electrophoresis could form the basis of a generic detection system for mid-spectrum protein and peptide toxins.

  2. Chemical analysis of bleach and hydroxide-based solutions after decontamination of the chemical warfare agent O-ethyl S-2-diisopropylaminoethyl methylphosphonothiolate (VX).

    Science.gov (United States)

    Hopkins, F B; Gravett, M R; Self, A J; Wang, M; Chua, Hoe-Chee; Hoe-Chee, C; Lee, H S Nancy; Sim, N Lee Hoi; Jones, J T A; Timperley, C M; Riches, J R

    2014-08-01

    Detailed chemical analysis of solutions used to decontaminate chemical warfare agents can be used to support verification and forensic attribution. Decontamination solutions are amongst the most difficult matrices for chemical analysis because of their corrosive and potentially emulsion-based nature. Consequently, there are relatively few publications that report their detailed chemical analysis. This paper describes the application of modern analytical techniques to the analysis of decontamination solutions following decontamination of the chemical warfare agent O-ethyl S-2-diisopropylaminoethyl methylphosphonothiolate (VX). We confirm the formation of N,N-diisopropylformamide and N,N-diisopropylamine following decontamination of VX with hypochlorite-based solution, whereas they were not detected in extracts of hydroxide-based decontamination solutions by nuclear magnetic resonance (NMR) spectroscopy or gas chromatography-mass spectrometry. We report the electron ionisation and chemical ionisation mass spectroscopic details, retention indices, and NMR spectra of N,N-diisopropylformamide and N,N-diisopropylamine, as well as analytical methods suitable for their analysis and identification in solvent extracts and decontamination residues.

  3. Detection of aqueous phase chemical warfare agent degradation products by negative mode ion mobility time-of-flight mass spectrometry [IM(tof)MS].

    Science.gov (United States)

    Steiner, Wes E; Harden, Charles S; Hong, Feng; Klopsch, Steve J; Hill, Herbert H; McHugh, Vincent M

    2006-02-01

    The use of negative ion monitoring mode with an atmospheric pressure ion mobility orthogonal reflector time-of-flight mass spectrometer [IM(tof)MS] to detect chemical warfare agent (CWA) degradation products from aqueous phase samples has been determined. Aqueous phase sampling used a traditional electrospray ionization (ESI) source for sample introduction and ionization. Certified reference materials (CRM) of CWA degradation products for the detection of Schedule 1, 2, or 3 toxic chemicals or their precursors as defined by the chemical warfare convention (CWC) treaty verification were used in this study. A mixture of six G-series nerve related CWA degradation products (EMPA, IMPA, EHEP, IHEP, CHMPA, and PMPA) and their related collision induced dissociation (CID) fragment ions (MPA and EPA) were found in each case to be clearly resolved and detected using the IM(tof)MS instrument in negative ion monitoring mode. Corresponding ions, masses, drift times, K(o) values, and signal intensities for each of the CWA degradation products are reported.

  4. Development of haemostatic decontaminants for treatment of wounds contaminated with chemical warfare agents. 3: Evaluation of in vitro topical decontamination efficacy using damaged skin.

    Science.gov (United States)

    Lydon, Helen L; Hall, Charlotte A; Dalton, Christopher H; Chipman, J Kevin; Graham, John S; Chilcott, Robert P

    2017-08-01

    Previous studies have demonstrated that haemostatic products with an absorptive mechanism of action retain their clotting efficiency in the presence of toxic materials and are effective in decontaminating chemical warfare (CW) agents when applied to normal, intact skin. The purpose of this in vitro study was to assess three candidate haemostatic products for effectiveness in the decontamination of superficially damaged porcine skin exposed to the radiolabelled CW agents, soman (GD), VX and sulphur mustard (HD). Controlled physical damage (removal of the upper 100 μm skin layer) resulted in a significant enhancement of the dermal absorption of all three CW agents. Of the haemostatic products assessed, WoundStat™ was consistently the most effective, being equivalent in performance to a standard military decontaminant (fuller's earth). These data suggest that judicious application of haemostatic products to wounds contaminated with CW agents may be a viable option for the clinical management of casualties presenting with contaminated, haemorrhaging injuries. Further studies using a relevant animal model are required to confirm the potential clinical efficacy of WoundStat™ for treating wounds contaminated with CW agents. Copyright © 2017 John Wiley & Sons, Ltd. Copyright © 2017 John Wiley & Sons, Ltd.

  5. Graphene oxide as sensitive layer in Love-wave surface acoustic wave sensors for the detection of chemical warfare agent simulants.

    Science.gov (United States)

    Sayago, Isabel; Matatagui, Daniel; Fernández, María Jesús; Fontecha, José Luis; Jurewicz, Izabela; Garriga, Rosa; Muñoz, Edgar

    2016-02-01

    A Love-wave device with graphene oxide (GO) as sensitive layer has been developed for the detection of chemical warfare agent (CWA) simulants. Sensitive films were fabricated by airbrushing GO dispersions onto Love-wave devices. The resulting Love-wave sensors detected very low CWA simulant concentrations in synthetic air at room temperature (as low as 0.2 ppm for dimethyl-methylphosphonate, DMMP, a simulant of sarin nerve gas, and 0.75 ppm for dipropylene glycol monomethyl ether, DPGME, a simulant of nitrogen mustard). High responses to DMMP and DPGME were obtained with sensitivities of 3087 and 760 Hz/ppm respectively. Very low limit of detection (LOD) values (9 and 40 ppb for DMMP and DPGME, respectively) were calculated from the achieved experimental data. The sensor exhibited outstanding sensitivity, good linearity and repeatability to all simulants tested. The detection mechanism is here explained in terms of hydrogen bonding formation between the tested CWA simulants and GO.

  6. Bioaccumulation of chemical warfare agents, energetic materials, and metals in deep-sea shrimp from discarded military munitions sites off Pearl Harbor

    Science.gov (United States)

    Koide, Shelby; Silva, Jeff A. K.; Dupra, Vilma; Edwards, Margo

    2016-06-01

    The bioaccumulation of munitions-related chemicals at former military deep-water disposal sites is poorly understood. This paper presents the results of human-food-item biota sampling to assess the potential for bioaccumulation of chemical warfare agents, energetic materials, arsenic, and additional munitions-related metals in deep-sea shrimp tissue samples collected during the Hawai'i Undersea Military Munitions Assessment (HUMMA) project to date. The HUMMA investigation area is located within a former munitions sea-disposal site located south of Pearl Harbor on the island of O'ahu, Hawai'i, designated site Hawaii-05 (HI-05) by the United States Department of Defense. Indigenous deep-sea shrimp (Heterocarpus ensifer) were caught adjacent to discarded military munitions (DMM) and at control sites where munitions were absent. Tissue analysis results showed that chemical warfare agents and their degradation products were not present within the edible portions of these samples at detectable concentrations, and energetic materials and their degradation products were detected in only a few samples at concentrations below the laboratory reporting limits. Likewise, arsenic, copper, and lead concentrations were below the United States Food and Drug Administration's permitted concentrations of metals in marine biota tissue (if defined), and their presence within these samples could not be attributed to the presence of DMM within the study area based on a comparative analysis of munitions-adjacent and control samples collected. Based on this current dataset, it can be concluded that DMM existing within the HUMMA study area is not contributing to the bioaccumulation of munitions-related chemicals for the biota species investigated to date.

  7. Roman Warfare

    Directory of Open Access Journals (Sweden)

    D.B. Saddington

    2012-03-01

    Full Text Available

    ROTH, Jonathan P 2009. Roman Warfare. Cambridge: Cambridge University Press. Pbk. R250. ISBN 978-0-521-53726-1.

    Jonathan Roth of San Jose State University, known as an expert on military logistics, has written this attractive Cambridge Introduction to Roman Civilization volume on Roman Warfare. The series is designed for students with no prior knowledge of Roman antiquity. The book comprises an Introduction on Sources and Methods (pp. 1-6 and 15 chapters on Roman warfare from the beginnings to the fall of the Western Empire in AD 476, using a chronological approach. There are 68 illustrations and maps, a Timeline, a Glossary, a Glossary of People, a Bibliography (which includes several websites and an Index.

  8. Governing Warfare

    DEFF Research Database (Denmark)

    Harste, Gorm

      It would seem as though warfare has gotten out of control, not only in Iraq and Afghanistan, but also in Central Africa. The paper outlines the strategic history of politically controlled warfare since the early Enlightenment. The argument is that control is implausible. The idea of control has...... the risks of lacking unity and displays the organisational trap to the fatal political myth of controlled warfare: Does it come from the military organisation system itself, from political ideologies of goal-rational governance, or from the chameleonic logic of wars?  ...... administration. While organisation systems continue to make some kind of political control possible, this is not the case in relation to wars. The organisation system is the in-between that should mediatise politics and war but is not functionally equivalent to just and unjust wars. The paper investigates...

  9. Toxicokinetics of the nerve agent (+/-)-VX in anesthetized and atropinized hairless guinea pigs and marmosets after intravenous and percutaneous administration.

    Science.gov (United States)

    van der Schans, Marcel J; Lander, Brenda J; van der Wiel, Herma; Langenberg, Jan P; Benschop, Hendrik P

    2003-08-15

    In continuation of our investigations on the toxicokinetics of the volatile nerve agents C(+/-)P(+/-)-soman and (+/-)-sarin, we now report on the toxicokinetics of the rather nonvolatile agent (+/-)-VX. A validated method was developed to determine blood levels of (+/-)-VX by means of achiral gas chromatography at blood levels > or =10 pg/ml. The ratio of the two enantiomers of VX in blood could be measured at levels > or =1 ng/ml by using chiral HPLC in combination with off-line gas chromatographic analysis. In order to obtain basic information on the toxicokinetics of (+/-)-VX, i.e., under conditions of 100% bioavailability, the blood levels of this agent were measured in hairless guinea pigs at iv doses corresponding with 1 and 2 LD50. The derived AUCs indicate a reasonable linearity of the toxicokinetics with dose. Also, the toxicokinetics in marmoset primates was studied at an absolute iv dose corresponding with 1 LD50 in the hairless guinea pig which led to approximately the same levels of (+/-)-VX in blood as observed at 2 LD50 in the hairless guinea pig. Finally, the toxicokinetics of (+/-)-VX were measured in hairless guinea pigs via the most relevant porte d' entrée for this agent, which is the percutaneous route at a dose corresponding with 1 LD50 (pc). Large variations were observed between individual animals in the rate of penetration of (+/-)-VX and in concomitant progression of AChE inhibition in blood of these animals. Blood levels of (+/-)-VX increased gradually over a 6-h period of time. After a 7-h penetration period, the total AUC corresponded with 2.5% bioavailability relative to iv administration. In contrast with the G-agents C(+/-)P(+/-)-soman and (+/-)-sarin, stereospecificity in the sequestration of the two enantiomers of (+/-)-VX is not a prominent phenomenon. It appears that (+/-)-VX is substantially more persistent in vivo than the two G-agents. This persistence may undermine the efficacy of pretreatment with carbamates of percutaneous

  10. Development of the HS-SPME-GC-MS/MS method for analysis of chemical warfare agent and their degradation products in environmental samples.

    Science.gov (United States)

    Nawała, Jakub; Czupryński, Krzysztof; Popiel, Stanisław; Dziedzic, Daniel; Bełdowski, Jacek

    2016-08-24

    After World War II approximately 50,000 tons of chemical weapons were dumped in the Baltic Sea by the Soviet Union under the provisions of the Potsdam Conference on Disarmament. These dumped chemical warfare agents still possess a major threat to the marine environment and to human life. Therefore, continue monitoring of these munitions is essential. In this work, we present the application of new solid phase microextraction fibers in analysis of chemical warfare agents and their degradation products. It can be concluded that the best fiber for analysis of sulfur mustard and its degradation products is butyl acrylate (BA), whereas for analysis of organoarsenic compounds and chloroacetophenone, the best fiber is a co-polymer of methyl acrylate and methyl methacrylate (MA/MMA). In order to achieve the lowest LOD and LOQ the samples should be divided into two subsamples. One of them should be analyzed using a BA fiber, and the second one using a MA/MMA fiber. When the fast analysis is required, the microextraction should be performed by use of a butyl acrylate fiber because the extraction efficiency of organoarsenic compounds for this fiber is acceptable. Next, we have elaborated of the HS-SPME-GC-MS/MS method for analysis of CWA degradation products in environmental samples using laboratory obtained fibers The analytical method for analysis of organosulfur and organoarsenic compounds was optimized and validated. The LOD's for all target chemicals were between 0.03 and 0.65 ppb. Then, the analytical method developed by us, was used for the analysis of sediment and pore water samples from the Baltic Sea. During these studies, 80 samples were analyzed. It was found that 25 sediments and 5 pore water samples contained CWA degradation products such as 1,4-dithiane, 1,4-oxathiane or triphenylarsine, the latter being a component of arsine oil. The obtained data is evidence that the CWAs present in the Baltic Sea have leaked into the general marine environment.

  11. Hemostatic agents for access tract in tubeless percutaneous nephrolithotomy: Is it worth?

    Directory of Open Access Journals (Sweden)

    Francisco Sepulveda

    2016-01-01

    Conclusion: The use of Gelita® and Surgicel® as hemostatic agents in tPNL is safe, but we were not able to demonstrate any significant benefit in terms of postoperative morbidity after comparing the use of these agents in tPNL. We concluded that the uses of hemostatic agents needed to be evaluated in prospective randomized trials to define its benefits.

  12. Chemical Warfare Agent Simulants in Gamble’s Fluid: Is the Fluid Toxic? Can It Be Made Safer by Inclusion of Solid Nanocrystalline Metal Oxides?

    Directory of Open Access Journals (Sweden)

    Dennis Karote

    2013-01-01

    Full Text Available The reactions of chemical warfare agent simulants, 2-chloroethyl ethyl sulfide (2-CEES and di-i-propyl fluoro phosphate (DFP, in fluids have been investigated. Data analyses confirm the major degradation pathway to be hydrolysis of 2-CEES to 2-hydroxyethyl ethyl sulfide, along with minor self-condensation products. Among the three fluids examined, 2-CEES degradation was the fastest in Gamble’s fluid during a 96 h period. Upon addition of Exceptional Hazard Attenuation Materials (EHAMs to 2-CEES containing Gamble’s fluid, degradation was generally improved during the first 24 h period. The 96 h outcome was similar for fluid samples with or without EHAM 2 and EHAM 4. EHAM 1-added fluid contained only one degradation product, 2-nitroethyl ethyl sulfide. DFP degradation was the slowest in Gamble’s fluid, but was enhanced by the addition of EHAMs. FTIR and solid state 31P NMR confirm the destructive adsorption of 2-CEES and DFP by the EHAMs. The results collectively demonstrate that 2-CEES and DFP decompose to various extents in Gamble’s fluid over a 96 h period but the fluid still contains a considerable amount of intact simulant. EHAM 1 appears to be promising for 2-CEES and DFP mitigation while EHAM 2 and EHAM 4 work well for early on concentration reduction of 2-CEES and DFP.

  13. Development of a Polymerase Chain Reaction Assay for Detection of Burkholderia mallei, a Potent Biological Warfare Agent

    OpenAIRE

    2016-01-01

    Burkholderia mallei is the etiological agent of glanders, primarily a disease of equines. B. mallei is closely related to B. pseudomallei, the causative agent of melioidosis. Therefore, detection of B. mallei and its differentiation from B. pseudomallei, has always been troublesome. In present investigation, a B. mallei specific DNA sequence was identified by performing BLASTn search using ~3000 ORFs of B. mallei NCTC 10229. A polymerase chain reaction (PCR) assay with internal amplification ...

  14. Sensitive monitoring of volatile chemical warfare agents in air by atmospheric pressure chemical ionization mass spectrometry with counter-flow introduction.

    Science.gov (United States)

    Seto, Yasuo; Kanamori-Kataoka, Mieko; Tsuge, Koichiro; Ohsawa, Isaac; Iura, Kazumitsu; Itoi, Teruo; Sekiguchi, Hiroyuki; Matsushita, Koji; Yamashiro, Shigeharu; Sano, Yasuhiro; Sekiguchi, Hiroshi; Maruko, Hisashi; Takayama, Yasuo; Sekioka, Ryoji; Okumura, Akihiko; Takada, Yasuaki; Nagano, Hisashi; Waki, Izumi; Ezawa, Naoya; Tanimoto, Hiroyuki; Honjo, Shigeru; Fukano, Masumi; Okada, Hidehiro

    2013-03-05

    A new method for sensitively and selectively detecting chemical warfare agents (CWAs) in air was developed using counter-flow introduction atmospheric pressure chemical ionization mass spectrometry (MS). Four volatile and highly toxic CWAs were examined, including the nerve gases sarin and tabun, and the blister agents mustard gas (HD) and Lewisite 1 (L1). Soft ionization was performed using corona discharge to form reactant ions, and the ions were sent in the direction opposite to the airflow by an electric field to eliminate the interfering neutral molecules such as ozone and nitrogen oxide. This resulted in efficient ionization of the target CWAs, especially in the negative ionization mode. Quadrupole MS (QMS) and ion trap tandem MS (ITMS) instruments were developed and investigated, which were movable on the building floor. For sarin, tabun, and HD, the protonated molecular ions and their fragment ions were observed in the positive ion mode. For L1, the chloride adduct ions of L1 hydrolysis products were observed in negative ion mode. The limit of detection (LOD) values in real-time or for a 1 s measurement monitoring the characteristic ions were between 1 and 8 μg/m(3) in QMS instrument. Collision-induced fragmentation patterns for the CWAs were observed in an ITMS instrument, and optimized combinations of the parent and daughter ion pairs were selected to achieve real-time detection with LOD values of around 1 μg/m(3). This is a first demonstration of sensitive and specific real-time detection of both positively and negatively ionizable CWAs by MS instruments used for field monitoring.

  15. HIGHLY SELECTIVE SENSORS FOR CHEMICAL AND BIOLOGICAL WARFARE AGENTS, INSECTICIDES AND VOCS BASED ON A MOLECULAR SURFACE IMPRINTING TECHNIQUE

    Science.gov (United States)

    Abstract was given as an oral platform presentation at the Pittsburgh Conference, Orlando FL (March 5-9, 2006). Research described is the development of sensors based on molecular surface imprinting. Applications include the monitoring of chemical and biological agents and inse...

  16. AN ENVIRONMENTAL TECHNOLOGY VERIFICATION (ETV) TESTING OF ENZYMATIC TEST KITS FOR WARFARE AGENTS AND PESTICIDES IN DRINKING WATER

    Science.gov (United States)

    Enzymatic test kits, generally designed to be handheld and portable, detect the presence of chemical agents, carbamate pesticides, and/or organophosphate pesticides by relying on the reaction of the cholinesterase enzyme. Under normal conditions, the enzyme reacts as expected wi...

  17. Effective methylation of phosphonic acids related to chemical warfare agents mediated by trimethyloxonium tetrafluoroborate for their qualitative detection and identification by gas chromatography-mass spectrometry.

    Science.gov (United States)

    Valdez, Carlos A; Leif, Roald N; Alcaraz, Armando

    2016-08-24

    The effective methylation of phosphonic acids related to chemical warfare agents (CWAs) employing trimethyloxonium tetrafluoroborate (TMO·BF4) for their qualitative detection and identification by gas chromatography-mass spectrometry (GC-MS) is presented. The methylation occurs in rapid fashion (1 h) and can be conveniently carried out at ambient temperature, thus providing a safer alternative to the universally employed diazomethane-based methylation protocols. Optimization of the methylation parameters led us to conclude that methylene chloride was the ideal solvent to carry out the derivatization, and that even though methylated products can be observed surfacing after only 1 h, additional time was not found to be detrimental but beneficial to the process particularly when dealing with analytes at low concentrations (∼10 μg mL(-1)). Due to its insolubility in methylene chloride, TMO·BF4 conveniently settles to the bottom during the reaction and does not produce additional interfering by-products that may further complicate the GC-MS analysis. The method was demonstrated to successfully methylate a variety of Schedule 2 phosphonic acids, including their half esters, resulting in derivatives that were readily detected and identified using the instrument's spectral library. Most importantly, the method was shown to simultaneously methylate a mixture of the organophosphorus-based nerve agent hydrolysis products: pinacolyl methylphosphonate (PMPA), cyclohexyl methylphosphonate (CyMPA) and ethyl methylphosphonate (EMPA) (at a 10 μg mL(-1) concentration each) in a fatty acid ester-rich organic matrix (OPCW-PT-O3) featured in the 38th Organisation for the Prohibition of Chemical Weapons (OPCW) Proficiency Test. In addition, the protocol was found to effectively methylate N,N-diethylamino ethanesulfonic acid and N,N-diisopropylamino ethanesulfonic acid that are products arising from the oxidative degradation of the V-series agents VR and VX respectively. The

  18. Rapid Analysis of Chemical Warfare Agents and Their Hydrolysis Products by Desorption Electrospray Ionization Mass Spectrometry (DESI-MS)

    Science.gov (United States)

    2009-10-01

    to diethyl hydrogen phosphate, suggesting that hydrolysis of nerve agents to their initial acids would be significant following autoclaving... toxins and related compounds: state of the art and future prospects. J. Chromatogr. A, 814, 1- 23. [4] Munro, N.B., Talmage, S.S., Griffin, G.D., Waters...Morrissey, K.M. and Durst, H.D. (2000). Trace determination of isopropyl methylphosphonofluoridate (GB) and bis (2-chloroethyl) sulfide (HD) in chemical

  19. Toxic Chemicals in the Soil Environment. Volume 2. Interactions of Some Toxic Chemicals/Chemical Warfare Agents and Soils

    Science.gov (United States)

    1985-06-01

    cholinesterase inhibitors . At least one, armin (O-ethyl’,ethyl 0,p-nit rophenyl phosphonate), is among the moot .powerful known choliniesterase inhibitor ...and is equivalent to the nerve 4 agents (Feat and Schmidt, 1973). All have been used as growth Inhibitors or terminators for some organisms...there was inhibition of the urease and oxidase enzymes. 2.2.4 Effects of Ozone and Sunlight on Orgenophoapborua Pesticides Spencer et al. (1980

  20. Diuretic Agent and Normal Saline Infusion Technique for Ultrasound-Guided Percutaneous Nephrostomies in Nondilated Pelvicaliceal Systems

    Energy Technology Data Exchange (ETDEWEB)

    Yagci, Cemil, E-mail: cemil.yagci@medicine.ankara.edu.tr; Ustuner, Evren, E-mail: evrenustuner@hotmail.com; Atman, Ebru Dusunceli, E-mail: ebrumd2001@yahoo.com [Ankara University, Department of Radiology, School of Medicine (Turkey); Baltaci, Sumer, E-mail: sbaltaci@hotmail.com [Ankara University, Department of Urology, School of Medicine (Turkey); Uzun, Caglar, E-mail: cuzun77@yahoo.com; Akyar, Serdar, E-mail: yusuf.s.akyar@medicine.ankara.edu.tr [Ankara University, Department of Radiology, School of Medicine (Turkey)

    2013-04-15

    Percutaneous nephrostomy (PCN) in a nondilated pelvicaliceal system is technically challenging. We describe an effective method to achieve transient dilatation of the pelvicaliceal system via induction of diuresis using infusion of a diuretic agent in normal saline, therefore allowing easier access to the pelvicaliceal system. Under real-time ultrasound guidance, the technique had been tested in 22 nephrostomies with nondilated system (a total of 20 patients with 2 patients having bilateral nephrostomies) during a 5-year period. Patients were given 40 mg of furosemide in 250 ml of normal saline solution intravenously by rapid infusion. As soon as maximum calyceal dilatation of more than 5 mm was observed, which is usually 15 min later after the end of rapid infusion, patients were positioned obliquely, and PCN procedure under ultrasound guidance was performed. The procedure was successful in 19 of the nephrostomies in 17 patients with a success rate of 86.36 % per procedure and 85 % per patient in nondilated pelvicaliceal systems. No major nephrostomy-, drug-, or technique-related complications were encountered. The technique failed to work in three patients due to the presence of double J catheters and preexisting calyceal perforation which avoided transient dilation of the pelvicaliceal system with diuresis. Diuretic infusion in saline is a feasible and effective method for PCN in nondilated pelvicaliceal systems.

  1. Fate of the chemical warfare agent O-ethyl S-2-diisopropylaminoethyl methylphosphonothiolate (VX) on soil following accelerant-based fire and liquid decontamination.

    Science.gov (United States)

    Gravett, M R; Hopkins, F B; Self, A J; Webb, A J; Timperley, C M; Riches, J R

    2014-08-01

    procedures and analytical methods suitable for investigating accelerant and decontaminant-soaked soil samples are presented. VX and its degradation products and/or impurities were detected under all the conditions studied, demonstrating that accelerant-based fire and liquid-based decontamination and then fire are unlikely to prevent the retrieval of evidence of chemical warfare agent (CWA) testing. This is the first published study of the effects of an accelerant-based fire on a CWA in environmental samples. The results will inform defence and security-based organisations worldwide and support the verification activities of the Organisation for the Prohibition of Chemical Weapons (OPCW), winner of the 2013 Nobel Peace Prize for its extensive efforts to eliminate chemical weapons.

  2. Wipe selection for the analysis of surface materials containing chemical warfare agent nitrogen mustard degradation products by ultra-high pressure liquid chromatography-tandem mass spectrometry.

    Science.gov (United States)

    Willison, Stuart A

    2012-12-28

    Degradation products arising from nitrogen mustard chemical warfare agent were deposited on common urban surfaces and determined via surface wiping, wipe extraction, and liquid chromatography–tandem mass spectrometry detection. Wipes investigated included cotton gauze, glass fiber filter, non-woven polyester fiber and filter paper, and surfaces included several porous (vinyl tile, painted drywall, wood) and mostly non-porous (laminate, galvanized steel, glass) surfaces. Wipe extracts were analyzed by ultra-high pressure liquid chromatography–tandem mass spectrometry (UPLC–MS/MS) and compared with high performance liquid chromatography–tandem mass spectrometry (HPLC–MS/MS) results. An evaluation of both techniques suggests UPLC–MS/MS provides a quick and sensitive analysis of targeted degradation products in addition to being nearly four times faster than a single HPLC run, allowing for greater throughput during a wide-spread release concerning large-scale contamination and subsequent remediation events. Based on the overall performance of all tested wipes, filter paper wipes were selected over other wipes because they did not contain interferences or native species (TEA and DEA) associated with the target analytes, resulting in high percent recoveries and low background levels during sample analysis. Other wipes, including cotton gauze, would require a pre-cleaning step due to the presence of large quantities of native species or interferences of the targeted analytes. Percent recoveries obtained from a laminate surface were 47–99% for all nitrogen mustard degradation products. The resulting detection limits achieved from wipes were 0.2 ng/cm(2) for triethanolamine (TEA), 0.03 ng/cm(2) for N-ethyldiethanolamine (EDEA), 0.1 ng/cm(2) for N-methyldiethanolamine (MDEA), and 0.1 ng/cm(2) for diethanolamine (DEA).

  3. Comparison of latex body paint with wetted gauze wipes for sampling the chemical warfare agents VX and sulfur mustard from common indoor surfaces.

    Science.gov (United States)

    Hernon-Kenny, Laura A; Behringer, Deborah L; Crenshaw, Michael D

    2016-05-01

    Comparison of solvent-wetted gauze with body paint, a peelable surface sampling media, for the sampling of the chemical warfare agents VX and sulfur mustard from nine surfaces was performed. The nine surfaces sampled are those typical of interior public venues and include smooth, rough, porous, and non-porous surfaces. Overall, solvent-wetted gauze (wipes) performed better for the recovery of VX from non-porous surfaces while body paint (BP) performed better for the porous surfaces. The average percent VX recoveries using wipes and BP, respectively, are: finished wood flooring, 86.2%, 71.4%; escalator handrail, 47.3%, 26.7%; stainless steel, 80.5%, 56.1%; glazed ceramic tile, 81.8%, 44.9%; ceiling tile, 1.77%, 13.1%; painted drywall 7.83%, 21.1%; smooth cement, 0.64%, 10.3%; upholstery fabric, 24.6%, 23.1%; unfinished wood flooring, 9.37%, 13.1%. Solvent-wetted gauze performed better for the recovery of sulfur mustard from three of the relatively non-porous surfaces while body paint performed better for the more porous surfaces. The average percent sulfur mustard recoveries using wipes and BP, respectively, are: finished wood flooring, 30.2%, 2.97%; escalator handrail, 4.40%, 4.09%; stainless steel, 21.2%, 3.30%; glazed ceramic tile, 49.7%, 16.7%; ceiling tile, 0.33%, 11.1%; painted drywall 2.05%, 10.6%; smooth cement, 1.20%, 35.2%; upholstery fabric, 7.63%, 6.03%; unfinished wood flooring, 0.90%, 1.74%.

  4. Development of a Polymerase Chain Reaction Assay for Detection of Burkholderia mallei, a Potent Biological Warfare Agent

    Directory of Open Access Journals (Sweden)

    Vijai Pal

    2016-09-01

    Full Text Available Burkholderia mallei is the etiological agent of glanders, primarily a disease of equines. B. mallei is closely related to B. pseudomallei, the causative agent of melioidosis. Therefore, detection of B. mallei and its differentiation from B. pseudomallei, has always been troublesome. In present investigation, a B. mallei specific DNA sequence was identified by performing BLASTn search using ~3000 ORFs of B. mallei NCTC 10229. A polymerase chain reaction (PCR assay with internal amplification control (IAC was developed for detection of B. mallei and its differentiation from B. pseudomallei. The PCR assay could amplify a specific 224-bp fragment from all the six B. mallei strains used in the study, whereas other closely related organisms were tested negative. The detection limit of the assay was found to be 10 pg of purified DNA of B. mallei. Incorporation of IAC in the assay makes the results reliable as false negative results which may arise due to presence of PCR inhibitors, can be avoided. For validation, the assay was tested on tap water, Bengal gram and grass artificially spiked with B. mallei. The developed assay can be used as a simple and rapid tool for detection of B. mallei.

  5. Iron oxide functionalized graphene nano-composite for dispersive solid phase extraction of chemical warfare agents from aqueous samples.

    Science.gov (United States)

    Chinthakindi, Sridhar; Purohit, Ajay; Singh, Varoon; Tak, Vijay; Goud, D Raghavender; Dubey, D K; Pardasani, Deepak

    2015-05-15

    Present study deals with the preparation and evaluation of graphene based magnetic nano-composite for dispersive solid phase extraction of Chemical Weapons Convention (CWC) relevant chemicals from aqueous samples. Nano-composite, Fe3O4@SiO2-G was synthesized by covalently bonding silica coated Fe3O4 onto the graphene sheets. Nerve agents (NA), Sulfur mustard (SM) and their non-toxic environmental markers were the target analytes. Extraction parameters like amount of sorbent, extraction time and desorption conditions were optimized. Dispersion of 20 milligram of sorbent in 200mL of water sample for 20min. followed by methanol/chloroform extraction produced average to good recoveries (27-94%) of targeted analytes. Recoveries of real agents exhibited great dependency upon sample pH and ionic strength. Sarin produced maximum recovery under mild acidic conditions (56% at pH 5) while VX demanded alkaline media (83% at pH 9). Salts presence in the aqueous samples was found to be advantageous, raising the recoveries to as high as 94% for SM. Excellent limits of detection (LOD) for sulphur mustard and VX (0.11ngmL(-1) and 0.19ngmL(-1) respectively) proved the utility of the developed method for the off-site analysis of CWC relevant chemicals.

  6. Medical countermeasure against respiratory toxicity and acute lung injury following inhalation exposure to chemical warfare nerve agent VX.

    Science.gov (United States)

    Nambiar, Madhusoodana P; Gordon, Richard K; Rezk, Peter E; Katos, Alexander M; Wajda, Nikolai A; Moran, Theodore S; Steele, Keith E; Doctor, Bhupendra P; Sciuto, Alfred M

    2007-03-01

    To develop therapeutics against lung injury and respiratory toxicity following nerve agent VX exposure, we evaluated the protective efficacy of a number of potential pulmonary therapeutics. Guinea pigs were exposed to 27.03 mg/m(3) of VX or saline using a microinstillation inhalation exposure technique for 4 min and then the toxicity was assessed. Exposure to this dose of VX resulted in a 24-h survival rate of 52%. There was a significant increase in bronchoalveolar lavage (BAL) protein, total cell number, and cell death. Surprisingly, direct pulmonary treatment with surfactant, liquivent, N-acetylcysteine, dexamethasone, or anti-sense syk oligonucleotides 2 min post-exposure did not significantly increase the survival rate of VX-exposed guinea pigs. Further blocking the nostrils, airway, and bronchioles, VX-induced viscous mucous secretions were exacerbated by these aerosolized treatments. To overcome these events, we developed a strategy to protect the animals by treatment with atropine. Atropine inhibits muscarinic stimulation and markedly reduces the copious airway secretion following nerve agent exposure. Indeed, post-exposure treatment with atropine methyl bromide, which does not cross the blood-brain barrier, resulted in 100% survival of VX-exposed animals. Bronchoalveolar lavage from VX-exposed and atropine-treated animals exhibited lower protein levels, cell number, and cell death compared to VX-exposed controls, indicating less lung injury. When pulmonary therapeutics were combined with atropine, significant protection to VX-exposure was observed. These results indicate that combinations of pulmonary therapeutics with atropine or drugs that inhibit mucous secretion are important for the treatment of respiratory toxicity and lung injury following VX exposure.

  7. Development of a gas-cylinder-free plasma desorption/ionization system for on-site detection of chemical warfare agents.

    Science.gov (United States)

    Iwai, Takahiro; Kakegawa, Ken; Aida, Mari; Nagashima, Hisayuki; Nagoya, Tomoki; Kanamori-Kataoka, Mieko; Miyahara, Hidekazu; Seto, Yasuo; Okino, Akitoshi

    2015-06-02

    A gas-cylinder-free plasma desorption/ionization system was developed to realize a mobile on-site analytical device for detection of chemical warfare agents (CWAs). In this system, the plasma source was directly connected to the inlet of a mass spectrometer. The plasma can be generated with ambient air, which is drawn into the discharge region by negative pressure in the mass spectrometer. High-power density pulsed plasma of 100 kW could be generated by using a microhollow cathode and a laboratory-built high-intensity pulsed power supply (pulse width: 10-20 μs; repetition frequency: 50 Hz). CWAs were desorbed and protonated in the enclosed space adjacent to the plasma source. Protonated sample molecules were introduced to the mass spectrometer by airflow through the discharge region. To evaluate the analytical performance of this device, helium and air plasma were directly irradiated to CWAs in the gas-cylinder-free plasma desorption/ionization system and the protonated molecules were analyzed by using an ion-trap mass spectrometer. A blister agent (nitrogen mustard 3) and nerve gases [cyclohexylsarin (GF), tabun (GA), and O-ethyl S-2-N,N-diisopropylaminoethyl methylphosphonothiolate (VX)] in solution in n-hexane were applied to the Teflon rod and used as test samples, after solvent evaporation. As a result, protonated molecules of CWAs were successfully observed as the characteristic ion peaks at m/z 204, 181, 163, and 268, respectively. In air plasma, the limits of detection were estimated to be 22, 20, 4.8, and 1.0 pmol, respectively, which were lower than those obtained with helium plasma. To achieve quantitative analysis, calibration curves were made by using CWA stimulant dipinacolyl methylphosphonate as an internal standard; straight correlation lines (R(2) = 0.9998) of the peak intensity ratios (target per internal standard) were obtained. Remarkably, GA and GF gave protonated dimer ions, and the ratios of the protonated dimer ions to the protonated

  8. Effective, Facile, and Selective Hydrolysis of the Chemical Warfare Agent VX Using Zr6-Based Metal-Organic Frameworks.

    Science.gov (United States)

    Moon, Su-Young; Wagner, George W; Mondloch, Joseph E; Peterson, Gregory W; DeCoste, Jared B; Hupp, Joseph T; Farha, Omar K

    2015-11-16

    The nerve agent VX is among the most toxic chemicals known to mankind, and robust solutions are needed to rapidly and selectively deactivate it. Herein, we demonstrate that three Zr6-based metal-organic frameworks (MOFs), namely, UiO-67, UiO-67-NH2, and UiO-67-N(Me)2, are selective and highly active catalysts for the hydrolysis of VX. Utilizing UiO-67, UiO-67-NH2, and UiO-67-N(Me)2 in a pH 10 buffered solution of N-ethylmorpholine, selective hydrolysis of the P-S bond in VX was observed. In addition, UiO-67-N(Me)2 was found to catalyze VX hydrolysis with an initial half-life of 1.8 min. This half-life is nearly 3 orders of magnitude shorter than that of the only other MOF tested to date for hydrolysis of VX and rivals the activity of the best nonenzymatic materials. Hydrolysis utilizing Zr-based MOFs is also selective and facile in the absence of pH 10 buffer (just water) and for the destruction of the toxic byproduct EA-2192.

  9. Determination of contamination of a chemical warfare-proof operating theatre with volatile anaesthetic agents and assessment of anaesthetic gas scavenging systems.

    Science.gov (United States)

    Yoganathan, S; Johnston, I G; Parnell, C J; Houghton, I T; Restall, J

    1991-11-01

    Three types of anaesthetic waste scavenging systems (active antipollution system, Papworth Block passive system and activated charcoal absorber system) were compared with a non-scavenging control to assess their effectiveness in reducing waste halothane concentrations in a chemical warfare-proof operating theatre. All three systems were found to reduce the level of pollution significantly.

  10. Analysis of chemical warfare agents in organic liquid samples with magnetic dispersive solid phase extraction and gas chromatography mass spectrometry for verification of the chemical weapons convention.

    Science.gov (United States)

    Singh, Varoon; Purohit, Ajay Kumar; Chinthakindi, Sridhar; Goud, Raghavender D; Tak, Vijay; Pardasani, Deepak; Shrivastava, Anchal Roy; Dubey, Devendra Kumar

    2016-05-27

    A simple, sensitive and low temperature sample preparation method is developed for detection and identification of Chemical Warfare Agents (CWAs) and scheduled esters in organic liquid using magnetic dispersive solid phase extraction (MDSPE) followed by gas chromatography-mass spectrometry analysis. The method utilizes Iron oxide@Poly(methacrylic acid-co-ethylene glycol dimethacrylate) resin (Fe2O3@Poly(MAA-co-EGDMA)) as sorbent. Variants of these sorbents were prepared by precipitation polymerization of methacrylic acid-co-ethylene glycol dimethacrylate (MAA-co-EGDMA) onto Fe2O3 nanoparticles. Fe2O3@poly(MAA-co-EGDMA) with 20% MAA showed highest recovery of analytes. Extractions were performed with magnetic microspheres by MDSPE. Parameters affecting the extraction efficiency were studied and optimized. Under the optimized conditions, method showed linearity in the range of 0.1-3.0μgmL(-1) (r(2)=0.9966-0.9987). The repeatability and reproducibility (relative standard deviations (RSDs) %) were in the range of 4.5-7.6% and 3.4-6.2% respectively for organophosphorous esters in dodecane. Limits of detection (S/N=3/1) and limit of quantification (S/N=10/1) were found to be in the range of 0.05-0.1μgmL(-1) and 0.1-0.12μgmL(-1) respectively in SIM mode for selected analytes. The method was successfully validated and applied to the extraction and identification of targeted analytes from three different organic liquids i.e. n-hexane, dodecane and silicon oil. Recoveries ranged from 58.7 to 97.3% and 53.8 to 95.5% at 3μgmL(-1) and 1μgmL(-1) spiking concentrations. Detection of diethyl methylphosphonate (DEMP) and O-Ethyl S-2-diisopropylaminoethyl methylphosphonothiolate (VX) in samples provided by the Organization for Prohibition of Chemical Weapons Proficiency Test (OPCW-PT) proved the utility of the developed method for the off-site analysis of CWC relevant chemicals.

  11. In vitro and in vivo percutaneous absorption of seleno-L-methionine, an antioxidant agent, and other selenium species

    Institute of Scientific and Technical Information of China (English)

    Chih-hung LIN; Chia-lang FANG; Saleh A AL-SUWAYEH; Shih-yun YANG; Jia-you FANG

    2011-01-01

    To investigate the in vitro and in vivo percutaneous absorption of seleno-L-methionine (Se-L-M),an ultraviolet (UV)-protecting agent,from aqueous solutions.Methods:Aqueous solutions of Se-L-M were prepared in pH 4,8,and 10.8 buffers.The pH 8 buffer contained 30% glycerol,propylene glycol (PG) and polyethylene glycol (PEG) 400.The in vitro skin permeation of Se-L-M via porcine skin and nude mouse skin was measured and compared using Franz diffusion cells.The in vivo skin tolerance study was performed,which examined transepidermal water loss (TEWL),skin pH and erythema.Results:In the excised porcine skin,the flux was 0.1,11.4 and 8.2 μg·cm-2·h-1 for the pH 4,8,and 10.8 buffers,respectively.A linear correlation between the flux and skin deposition was determined.According to permeation across skin with different treatments (stripping,delipidation,and ethanol treatments),it was determined that the intracellular route comprised the predominant pathway for Se-L-M permeation from pH 8 buffer.Aqueous solutions of seleno-DL-methionine (Se-DL-M),selenium sulfide and selenium-containing quantum dot nanoparticles were also used as donor systems.The DL form showed a lower flux (7.0 vs 11.4 μg·cm2·h-1) and skin uptake (23.4 vs 47.3 μg/g) as compared to the L form,indicating stereoselective permeation of this compound.There was no or only negligible permeation of selenium sulfide and quantum dots into and across the skin.With in vivo topical application for 4 and 8 h,the skin deposition of Se-L-M was about 7 μg/g,and values were comparable to each other.The topical application of Se-L-M for up to 5 d did not caused apparent skin irritation.However,slight inflammation of the dermis was noted according to the histopathological examination.Conclusion:Se-L-M was readily absorbed by the skin in both the in vitro and in vivo experiments.The established profiles of Se-L-M skin absorption will be helpful in developing topical products of this compound.

  12. Flying Electronic Warfare Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Provides NP-3D aircraft host platforms for Effectiveness of Navy Electronic Warfare Systems (ENEWS) Program antiship missile (ASM) seeker simulators used...

  13. Flying Electronic Warfare Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Provides NP-3D aircraft host platforms for Effectiveness of Navy Electronic Warfare Systems (ENEWS) Program antiship missile (ASM) seeker simulators used...

  14. Chemical and biological warfare: General studies. (Latest citations from the NTIS bibliographic database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-10-01

    The bibliography contains citations concerning federally sponsored and conducted studies into chemical and biological warfare operations and planning. These studies cover areas not addressed in other parts of this series. The topics include production and storage of agents, delivery techniques, training, military and civil defense, general planning studies, psychological reactions to chemical warfare, evaluations of materials exposed to chemical agents, and studies on banning or limiting chemical warfare. Other published searches in this series on chemical warfare cover detection and warning, defoliants, protection, and biological studies, including chemistry and toxicology. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  15. Chemical and biological warfare: General studies. (Latest citations from the NTIS bibliographic database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-11-01

    The bibliography contains citations concerning federally sponsored and conducted studies into chemical and biological warfare operations and planning. These studies cover areas not addressed in other parts of this series. The topics include production and storage of agents, delivery techniques, training, military and civil defense, general planning studies, psychological reactions to chemical warfare, evaluations of materials exposed to chemical agents, and studies on banning or limiting chemical warfare. Other published searches in this series on chemical warfare cover detection and warning, defoliants, protection, and biological studies, including chemistry and toxicology.(Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  16. Defining cyber warfare

    Directory of Open Access Journals (Sweden)

    Dragan D. Mladenović

    2012-04-01

    Full Text Available Cyber conflicts represent a new kind of warfare that is technologically developing very rapidly. Such development results in more frequent and more intensive cyber attacks undertaken by states against adversary targets, with a wide range of diverse operations, from information operations to physical destruction of targets. Nevertheless, cyber warfare is waged through the application of the same means, techniques and methods as those used in cyber criminal, terrorism and intelligence activities. Moreover, it has a very specific nature that enables states to covertly initiate attacks against their adversaries. The starting point in defining doctrines, procedures and standards in the area of cyber warfare is determining its true nature. In this paper, a contribution to this effort was made through the analysis of the existing state doctrines and international practice in the area of cyber warfare towards the determination of its nationally acceptable definition.

  17. Rethinking Defensive Information Warfare

    Science.gov (United States)

    2004-06-01

    electronic warfare, and special information operations. Defensive information operations ensure timely, accurate, and relevant information access...information and information systems. IA, physical security, OPSEC, counter-deception, counter-psyops, CI, EW, and special information operations. Ensure

  18. Optimization of Quantitative Proteomics Using 2-Dimensional Difference Gel Electrophoresis to Characterize Molecular Mechanisms of Chemical Warfare Nerve Agent Exposure in the Rat Brain

    Science.gov (United States)

    2010-11-01

    damaging effects of nerve agents. Currently, one prophylactic (pyridostigmine) and three therapeutic drugs (atropine, pralidoxime chloride, and diazepam ...and J.H. McDonough, Efficacy of biperiden and atropine as anticonvulsant treatment for organophosphorus nerve agent intoxication. Archives of

  19. Extravascular injection of sclerotic agents does not affect vessels in the rat: experimental implications for percutaneous sclerotherapy of arteriovenous malformations.

    Science.gov (United States)

    Sato, D; Kurita, M; Ozaki, M; Kaji, N; Takushima, A; Harii, K

    2012-07-01

    Sclerotherapy is useful for the treatment of arteriovenous vascular malformations. However, intravascular administration of sclerotic agents into small arteriovenous niduses is often difficult. Extravascular administration of sclerotic agents causes reduction of vascular flow on Doppler echo during clinical sclerotherapy. Therefore, we aimed to investigate whether the extravascular injection of sclerotic agents affects tiny vessels. Animal study. The effect of extravascular injection of sclerotic agents on vessels was investigated using rat femoral and superficial inferior epigastric vessels. After surgical exposure of vessels, absolute ethanol, 5% ethanolamine oleate and 3% polidocanol were injected into perivascular surrounding tissues, and their effect on vessels was evaluated after 14 days using histology and coloured silicone rubber injection. The integrity of the vascular lumen, endothelial cells and vascular patency were not affected by injection of sclerotic agents. Attenuation of vascular flow of an arteriovenous shunt after extravascular injection of sclerotic agents is transient and/or trivial and does not cause disruption of vessels. Therefore, sclerotic agents should be delivered to obtain sufficient destruction of arteriovenous malformation lesions and blood flow. Copyright © 2012 European Society for Vascular Surgery. Published by Elsevier Ltd. All rights reserved.

  20. Haemostatic agents of the gelatin matrix for a large liver wound by percutaneous injection without pressure under the guidance of contrast-enhanced ultrasound

    Institute of Scientific and Technical Information of China (English)

    YU Teng-fei; L(U) Fa-qin; LI Zhi-yan; LIU Ling; LIU Qiang; LIU Ai-jun; HUANG Ya-qin; TANG Jie

    2011-01-01

    Background The non-operation treatment of intra-abdominal trauma guided contrast enhanced ultrasound (CEUS) is one of the hottest research topic. Gelatin/thrombin/calcium (GTC) was developed as a novel haemostatic agent for non-operable intra-abdominal trauma. We hypothesized that GTC can achieve haemostasis (without the use of pressure)within a short time in a large wound model by percutaneous injection under CEUS guidance.Methods Forty Wister rats received large liver injuries by haemostatic clamp and were randomly divided into four groups, according to the haemostatic agent used. These included normal saline (NS) group A, lyophilising thrombin powder (LTP) group B, GTC group C, and absorbable α-cyanoacrylate (ACNA) group D. Each injury site was treated with one of the above materials and total bleeding time was recorded. All liver wounds were evaluated using CEUS at three periods: pre-injury, injury and post-treatment. The liver wounds were also evaluated by histology 3, 6, and 9 days after injury and the extents of abdominal adhesions were recorded.Results The sensitivity of CEUS (100%) in detecting blunt traumatic liver lesions was significantly higher than conventional ultrasound (42.5%). Bleeding times at the injury site in the GTC group C ((129.3±14.0) seconds) and ACNA group D ((5.2±1.0) seconds) were significantly shorter than those in the NS group A ((369.5±48.8) seconds, P <0.01) and LTP group B ((324.7±52.22) seconds, P <0.01). The LTP group B showed no significant difference compared with the NS group A. Gross examination of liver tissue revealed that there were fewer intra-abdominal adhesions in the GTC group C (10%) than in the ACNA group D (100%). Histopathologic examination showed that GTC was completely absorbed after nine days.Conclusions GTC, delivered by percutaneous injection under CEUS, may achieve haemostasis (without the use of pressure) within a short time in a large wound model. GTC is absorbable and may prevent intra

  1. Probabilistic modeling of percutaneous absorption for risk-based exposure assessments and transdermal drug delivery.

    Energy Technology Data Exchange (ETDEWEB)

    Ho, Clifford Kuofei

    2004-06-01

    Chemical transport through human skin can play a significant role in human exposure to toxic chemicals in the workplace, as well as to chemical/biological warfare agents in the battlefield. The viability of transdermal drug delivery also relies on chemical transport processes through the skin. Models of percutaneous absorption are needed for risk-based exposure assessments and drug-delivery analyses, but previous mechanistic models have been largely deterministic. A probabilistic, transient, three-phase model of percutaneous absorption of chemicals has been developed to assess the relative importance of uncertain parameters and processes that may be important to risk-based assessments. Penetration routes through the skin that were modeled include the following: (1) intercellular diffusion through the multiphase stratum corneum; (2) aqueous-phase diffusion through sweat ducts; and (3) oil-phase diffusion through hair follicles. Uncertainty distributions were developed for the model parameters, and a Monte Carlo analysis was performed to simulate probability distributions of mass fluxes through each of the routes. Sensitivity analyses using stepwise linear regression were also performed to identify model parameters that were most important to the simulated mass fluxes at different times. This probabilistic analysis of percutaneous absorption (PAPA) method has been developed to improve risk-based exposure assessments and transdermal drug-delivery analyses, where parameters and processes can be highly uncertain.

  2. On the Probability of Predicting and Mapping Traditional Warfare Measurements to the Cyber Warfare Domain

    CSIR Research Space (South Africa)

    Grobler, M

    2014-07-01

    Full Text Available to cyber warfare. This article aims to provide evidence towards the probability of predicting and mapping traditional warfare measurements to the cyber warfare domain. Currently the only way of cyber warfare measurement is located in traditional information...

  3. 生物战剂气溶胶侦检技术国外相关专利分析%Analysis of Bio-aerosol Warfare Agent Detection and Identification Technology Based on Foreign Patent Information

    Institute of Scientific and Technical Information of China (English)

    李鹏; 王运斗

    2012-01-01

    Patent information is the latest achievement of scientific research program which can reflect the last orientation of technology. This paper chooses SOOPAT as the patent data source, studies retrieval patent data, then obtains the current situation of bio - aerosol detection and identification technology, key areas and trends. Next, the article proposes reflections on the domestic development of biological warfare agents aerosol detect technology. The results have significant guidance for the development of related biological detectors.%专利信息作为科研活动的最新成果,能反映技术的最新动态.选择SOOPAT作为专利数据检索源,通过对检索到的专利数据进行分析研究,得出生物战剂气溶胶侦检技术现状、关键领域和发展趋势,然后对国内发展生物战剂气溶胶侦检技术提出几点思考.研究结果对于指导相关生物侦检装备的发展具有一定的指导意义.

  4. Identification of the factors that govern the ability of therapeutic antibodies to provide postchallenge protection against botulinum toxin: a model for assessing postchallenge efficacy of medical countermeasures against agents of bioterrorism and biological warfare.

    Science.gov (United States)

    Al-Saleem, Fetweh H; Nasser, Zidoon; Olson, Rebecca M; Cao, Linsen; Simpson, Lance L

    2011-08-01

    Therapeutic antibodies are one of the major classes of medical countermeasures that can provide protection against potential bioweapons such as botulinum toxin. Although a broad array of antibodies are being evaluated for their ability to neutralize the toxin, there is little information that defines the circumstances under which these antibodies can be used. In the present study, an effort was made to quantify the temporal factors that govern therapeutic antibody use in a postchallenge scenario. Experiments were done involving inhalation administration of toxin to mice, intravenous administration to mice, and direct application to murine phrenic nerve-hemidiaphragm preparations. As part of this study, several pharmacokinetic characteristics of botulinum toxin and neutralizing antibodies were measured. The core observation that emerged from the work was that the window of opportunity within which postchallenge administration of antibodies exerted a beneficial effect increased as the challenge dose of toxin decreased. The critical factor in establishing the window of opportunity was the amount of time needed for fractional redistribution of a neuroparalytic quantum of toxin from the extraneuronal space to the intraneuronal space. This redistribution event was a dose-dependent phenomenon. It is likely that the approach used to identify the factors that govern postchallenge efficacy of antibodies against botulinum toxin can be used to assess the factors that govern postchallenge efficacy of medical countermeasures against any agent of bioterrorism or biological warfare.

  5. Biological warfare, bioterrorism, and biocrime.

    Science.gov (United States)

    Jansen, H J; Breeveld, F J; Stijnis, C; Grobusch, M P

    2014-06-01

    Biological weapons achieve their intended target effects through the infectivity of disease-causing infectious agents. The ability to use biological agents in warfare is prohibited by the Biological and Toxin Weapon Convention. Bioterrorism is defined as the deliberate release of viruses, bacteria or other agents used to cause illness or death in people, but also in animals or plants. It is aimed at creating casualties, terror, societal disruption, or economic loss, inspired by ideological, religious or political beliefs. The success of bioterroristic attempts is defined by the measure of societal disruption and panic, and not necessarily by the sheer number of casualties. Thus, making only a few individuals ill by the use of crude methods may be sufficient, as long as it creates the impact that is aimed for. The assessment of bioterrorism threats and motives have been described before. Biocrime implies the use of a biological agent to kill or make ill a single individual or small group of individuals, motivated by revenge or the desire for monetary gain by extortion, rather than by political, ideological, religious or other beliefs. The likelihood of a successful bioterrorist attack is not very large, given the technical difficulties and constraints. However, even if the number of casualties is likely to be limited, the impact of a bioterrorist attack can still be high. Measures aimed at enhancing diagnostic and therapeutic capabilities and capacities alongside training and education will improve the ability of society to combat 'regular' infectious diseases outbreaks, as well as mitigating the effects of bioterrorist attacks.

  6. Background chemistry for chemical warfare agents and decontamination processes in support of delisting waste streams at the U.S. Army Dugway Proving Ground, Utah

    Energy Technology Data Exchange (ETDEWEB)

    Rosenblatt, D.H.; Small, M.J.; Kimmell, T.A.; Anderson, A.W.

    1996-04-01

    The State of Utah, Department of Environmental Quality (DEQ), Division of Solid and Hazardous Waste (DSHW), has declared residues resulting from the demilitarization, treatment, cleanup, and testing of military chemical agents to be hazardous wastes. These residues have been designated as corrosive, reactive, toxic, and acute hazardous (Hazardous Waste No. F999). The RCRA regulations (40 Code of Federal Regulations [CFR] 260-280), the Utah Administrative Code (R-315), and other state hazardous waste programs list specific wastes as hazardous but allow generators to petition the regulator to {open_quotes}delist,{close_quotes} if it can be demonstrated that such wastes are not hazardous. The U.S. Army Test and Evaluation Command (TECOM) believes that certain categories of F999 residues are not hazardous and has obtained assistance from Argonne National Laboratory (Argonne) to make the delisting demonstration. The objective of this project is to delist chemical agent decontaminated residues resulting from materials testing activities and to delist a remediation residue (e.g., contaminated soil). To delist these residues, it must be demonstrated that the residues (1) do not contain hazardous quantities of the listed agents; (2) do not contain hazardous quantities of constituents listed in 40 CFR Part 261, Appendix VIII; (3) do not exhibit other characteristics that could define the residues as hazardous; and (4) do not fail a series of acute toxicity tests. The first phase will focus on a subset of the F999 wastes generated at the U.S. Army Dugway Proving Ground (DPG), where the Army tests the effects of military chemical agents and agent-decontamination procedures on numerous military items. This effort is identified as Phase I of the Delisting Program. Subsequent phases will address other DPG chemical agent decontaminated residues and remediation wastes and similar residues at other installations.

  7. The Physics of Warfare

    Science.gov (United States)

    Giordano, Gerardo

    2015-01-01

    Recently, I was tasked with the creation and execution of a new themed general education physics class called The Physics of Warfare. In the past, I had used the theme of a class, such as the physics of sports medicine, as a way to create homework and in-class activities, generate discussions, and provide an application to demonstrate that physics…

  8. Percutaneous dissolution of renal calculi.

    Science.gov (United States)

    Dretler, S P; Pfister, R C

    1983-01-01

    The use of percutaneous nephrostomy catheters has allowed access to intrarenal urinary calculi for dissolution. Renacidin is the successful agent for dissolving struvite stones. THAM-E is the most effective agent for the intrarenal dissolution of cystine stone. Calcium oxalate stones are still resistant to dissolution techniques.

  9. Hybrid Warfare: the 21st Century Russian Way of Warfare

    Science.gov (United States)

    2017-05-25

    social, military, information, and diplomatic means. Russian information operations are a critical component of their hybrid theory of warfare and...in which NATO discontinues encroaching on Russia’s sphere of influence and in which Russia ascends to regional hegemony .2 Although unsuccessful, this...Russian model of hybrid warfare illuminates several critical innovations to warfare that transpired while the United States was committed to operations

  10. A computational study of detoxification of lewisite warfare agents by British anti-lewisite: catalytic effects of water and ammonia on reaction mechanism and kinetics.

    Science.gov (United States)

    Sahu, Chandan; Pakhira, Srimanta; Sen, Kaushik; Das, Abhijit K

    2013-04-25

    trans-2-Chlorovinyldichloroarsine (lewisite, L agent, Lew-I) acts as a blistering agents. British anti-lewisite (BAL, 2,3-dimercaptopropanol) has long been used as an L-agent antidote. The main reaction channels for the detoxification proceed via breaking of As-Cl bonds and formation of As-S bonds, producing stable, nontoxic ring product [(2-methyl-1,3,2-dithiarsolan-4-yl)methanol]. M06-2X/GENECP calculations have been carried out to establish the enhanced rate of detoxification mechanism in the presence of NH3 and H2O catalysts in both gas and solvent phases, which has been modeled by use of the polarized continuum model (PCM). In addition, natural bond orbital (NBO) and atoms in molecules (AIM) analysis have been performed to characterize the intermolecular hydrogen bonding in the transition states. Transition-state theory (TST) calculation establishes that the rates of NH3-catalyzed (2.88 × 10(-11) s(-1)) and H2O-catalyzed (2.42 × 10(-11) s(-1)) reactions are reasonably faster than the uncatalyzed detoxification (5.44 × 10(-13) s(-1)). The results obtained by these techniques give new insight into the mechanism of the detoxification process, identification and thermodynamic characterization of the relevant stationary species, the proposal of alternative paths on modeled potential energy surfaces for uncatalyzed reaction, and the rationalization of the mechanistic role played by catalysts and solvents.

  11. Evaluation on the capability of a skin decontaminatant PF2009 to inactivate chemical warfare agents%皮肤洗消剂PF2009对化学毒剂的消毒作用

    Institute of Scientific and Technical Information of China (English)

    刘红岩; 刘艳芹; 应莺; 林京玉; 王伊文; 左国民; 朱海燕; 钟玉绪

    2011-01-01

    Objective To evaluate the capability of skin decontamination lotion PF2009 to decontaminate chemical warfare agents. Methods The remnant of chemical warfare agents, soman (GD), VX or sulfur mustard(HD), was measured with gas phase chromatography or T-135 method after being mixed with PF2009 for indicated time. The mixtures of PF2009 with GD, VX at a molar ratio of 10:1 was measured by the main agent were administered to rabbits through intraperitoneal injection. 6 days later, the activity of acetylcholinesterase(AChE) in animal blood was determined with the method of DTNB. The survival rate was calculated after counting the living and died rabbits. The mixtures of PF2009 with HD were administered to rabbit skin. The area of injured skin was measured. Histochemical method was employed to observe the pathological change in the injured skin. Results Remnant of GD or VX could not be detected after being mixed with PF2009 at a volume ratio of 150 for 10 min. Under the same mixing condition, decontaminated HD increased from 80% to 94% when prolonging the incubation time from 10 to 60 min. Rabbits were intraperitoneally administered with the mixture of PF2009 with GD at a dose of 454 or 9.00 mg/kg or VX at a dose 3.34 mg/kg. No animals died in PF2009 group. In contrast, all rabbits died in lotion matrix control group during the 6 days' observation. 90% activity of AChE in blood was maintained for PF2009 group when compared with that for un-administered normal animals. The mixture of PF2009 with HD was administered to the rabbit skin at a dose of 1 mg/ cm2. The damage of skin was much lighter in PF2009 group than in lotion matrix control group when being evaluated with the area value of injured skin and histochemical staining. Conclusion The skin decontamination lotion PF2009 is effective in inactivating chemical warfare agents in vitro.%目的 通过检测皮肤洗消剂PF2009对化学毒剂的体外消毒效率,对皮肤洗消剂PF2009的消毒效果进行评价.方法

  12. Determination of threshold adverse effect doses of percutaneous VX exposure in African green monkeys.

    Science.gov (United States)

    Genovese, Raymond F; Benton, Bernard J; Oubre, John L; Byers, Christopher E; Jakubowski, E Michael; Mioduszewski, Robert J; Settle, Timothy J; Steinbach, Thomas J

    2011-01-11

    Percutaneous exposure to the chemical warfare nerve agent VX was evaluated in African green monkeys (n=9). Doses of VX (7.5-100 μg/kg) were applied to the skin for 60 min and residual agent was quantified (before decontamination) to estimate the absorbed dose. Monkeys were evaluated for the presence or absence of clinical signs of toxicity and blood was sampled periodically (30 min--12 weeks) following exposure to measure the degree of circulating acetylcholinesterase (AChE) inhibition. Monkeys were also evaluated for behavioral changes from VX exposure using a serial probe recognition (SPR) task. The lowest observable adverse effect level (LOAEL) for the production of major clinical signs was determined to be 42.22 μg/kg (absorbed dose estimate=17.36 μg/kg) and the LOAEL for AChE inhibition was 13.33 μg/kg (absorbed dose estimate=6.53 μg/kg). Behavioral performance was unaffected at doses that, while producing substantial AChE inhibition, did not produce clinical signs. VX represents a substantial threat as a contact hazard and these results complement previous studies using the percutaneous route of exposure with VX and extend the findings to a non-human primate species.

  13. Electronic Warfare Signature Measurement Facility

    Data.gov (United States)

    Federal Laboratory Consortium — The Electronic Warfare Signature Measurement Facility contains specialized mobile spectral, radiometric, and imaging measurement systems to characterize ultraviolet,...

  14. Electronic Warfare Signature Measurement Facility

    Data.gov (United States)

    Federal Laboratory Consortium — The Electronic Warfare Signature Measurement Facility contains specialized mobile spectral, radiometric, and imaging measurement systems to characterize ultraviolet,...

  15. Electronic Warfare in Operations

    Science.gov (United States)

    2009-02-25

    through gamma radiation (at the short-wavelength end). It covers wavelengths from thousands of kilometers to a fraction of the size of an atom...INFORMATION FUSION EXCHANGE F-13. The Knowledge and Information Fusion Exchange (sometimes called KnIFE ) is a program sponsored by U.S. Joint Forces...Warfare Analysis Center, 7-9 K–L–M Knowledge and Information Fusion Exchange ( KnIFE ), F-13 lasers, directed energy and, A-7 leadership (element

  16. Modern Maritime Trade Warfare

    Science.gov (United States)

    2013-05-20

    historically established method for conducting maritime trade warfare is Maritime Interdiction Operations ( MIO ). In the context of this paper, the...operating far from friendly shores. Accordingly, this tool would be most useful against nations with less capable navies. An advantage of MIO in...or collateral damage. 6 Large-scale MIO can be resource intensive and time consuming, and the U.S. Navy and Coast Guard have limited ships and

  17. The fragmentation pathways of protonated Amiton in the gas phase: towards the structural characterisation of organophosphorus chemical warfare agents by electrospray ionisation tandem mass spectrometry.

    Science.gov (United States)

    Ellis-Steinborner, Simon; Ramachandran, Aravind; Blanksby, Stephen J

    2006-01-01

    Amiton (O,O-diethyl-S-[2-(diethylamino)ethyl] phosphorothiolate), otherwise known as VG, is listed in schedule 2 of the Chemical Weapons Convention (CWC) and has a structure closely related to VX (O-ethyl-S-(2-diisopropylamino)ethylmethylphosphonothiolate). Fragmentation of protonated VG in the gas phase was performed using electrospray ionisation ion trap mass spectrometry (ESI-ITMS) and revealed several characteristic product ions. Quantum chemical calculations provide the most probable structures for these ions as well as the likely unimolecular mechanisms by which they are formed. The decomposition pathways predicted by computation are consistent with deuterium-labeling studies. The combination of experimental and theoretical data suggests that the fragmentation pathways of VG and analogous organophosphorus nerve agents, such as VX and Russian VX, are predictable and thus ESI tandem mass spectrometry is a powerful tool for the verification of unknown compounds listed in the CWC.

  18. Abdominal bloating and irritable bowel syndrome like symptoms following microinstillation inhalation exposure to chemical warfare nerve agent VX in guinea pigs.

    Science.gov (United States)

    Katos, Alexandre M; Conti, Michele L; Moran, Theodore S; Gordon, Richard K; Doctor, Bhupendra P; Sciuto, Alfred M; Nambiar, Madhusoodana P

    2007-05-01

    While assessing the methylphosphonothioic acid S-(2-(bis(1-methylethyl)amino)ethyl)O-ethyl ester (VX) induced respiratory toxicity and evaluating therapeutics against lung injury, we observed that the animals were experiencing abnormal swelling in the abdominal area. Nerve agent has been known to increase salivary, nasal and gastrointestinal secretion and cause diarrhea. This study was initiated to investigate the effect of VX on the gastrointestinal tract (GI) since abdominal pathology may affect breathing and contribute to the on going respiratory toxicity. The mid-abdominal diameter and the size of the lower left abdomen was measured before and after 27.3 mg/m3 VX exposure by microinstillation and at 30 min intervals up to 2 h post-VX exposure. Both VX and saline exposed animals exhibited a decrease in circumference of the upper abdomen, although the decrease was slightly higher in VX-exposed animals up to 1 h. The waist diameter increased slightly in VX-exposed animals from 60 to 90 min post-VX exposure but was similar to saline controls. The lower left abdomen near to the cecum, 6 cm below and 2cm to the right of the end of the sternum, showed an increase in size at 30-60 min that was significantly increased at 90-120 min post-VX exposure. In addition, VX-exposed animals showed loose fecal matter compared to controls. Necropsy at 24h showed an increased small intestine twisting motility in VX-exposed animals. Body tissue AChE assay showed high inhibition in the esophagus and intestine in VX-exposed animals indicating that a significant amount of the agent is localized to the GI following microinstillation exposure. These results suggest that microinstillatipn inhalation VX exposure induces gastrointestinal disturbances similar to that of irritable bowel syndrome and bloating.

  19. Measurement of breakthrough volumes of volatile chemical warfare agents on a poly(2,6-diphenylphenylene oxide)-based adsorbent and application to thermal desorption-gas chromatography/mass spectrometric analysis.

    Science.gov (United States)

    Kanamori-Kataoka, Mieko; Seto, Yasuo

    2015-09-04

    To establish adequate on-site solvent trapping of volatile chemical warfare agents (CWAs) from air samples, we measured the breakthrough volumes of CWAs on three adsorbent resins by an elution technique using direct electron ionization mass spectrometry. The trapping characteristics of Tenax(®) TA were better than those of Tenax(®) GR and Carboxen(®) 1016. The latter two adsorbents showed non-reproducible breakthrough behavior and low VX recovery. The specific breakthrough values were more than 44 (sarin) L/g Tenax(®) TA resin at 20°C. Logarithmic values of specific breakthrough volume for four nerve agents (sarin, soman, tabun, and VX) showed a nearly linear correlation with the reciprocals of their boiling points, but the data point of sulfur mustard deviated from this linear curve. Next, we developed a method to determine volatile CWAs in ambient air by thermal desorption-gas chromatography (TD-GC/MS). CWA solutions that were spiked into the Tenax TA(®) adsorbent tubes were analyzed by a two-stage TD-GC/MS using a Tenax(®) TA-packed cold trap tube. Linear calibration curves for CWAs retained in the resin tubes were obtained in the range between 0.2pL and 100pL for sarin, soman, tabun, cyclohexylsarin, and sulfur mustard; and between 2pL and 100pL for VX and Russian VX. We also examined the stability of CWAs in Tenax(®) TA tubes purged with either dry or 50% relative humidity air under storage conditions at room temperature or 4°C. More than 80% sarin, soman, tabun, cyclohexylsarin, and sulfur mustard were recovered from the tubes within 2 weeks. In contrast, the recoveries of VX and Russian VX drastically reduced with storage time at room temperature, resulting in a drop to 10-30% after 2 weeks. Moreover, we examined the trapping efficiency of Tenax TA(®) adsorbent tubes for vaporized CWA samples (100mL) prepared in a 500mL gas sampling cylinder. In the concentration range of 0.2-2.5mg/m(3), >50% of sarin, soman, tabun, cyclohexylsarin, and HD were

  20. Toxicology and pharmacology of the chemical warfare agent sulfur mustard - a review. Final technical report, 29 September 1994-31 January 1995

    Energy Technology Data Exchange (ETDEWEB)

    Dacre, J.C.; Beers, R.; Goldman, M.

    1995-04-05

    Sulfur mustard is a poisonous chemical agent which exerts a local action on the eyes, skin and respiratory tissue with subsequent systemic action on the nervous, cardiac, and digestive and endocrine systems in man and laboratory animals causing lacrimation, malaise, anorexia, salivation, respiratory distress, vomiting, hyperexcitability, cardiac distress, and death. Sulfur mustard is a cell poison which causes disumption and impairment of a variety of cellular activities which are dependent upon a very specific integral relationship. These cytotoxic effects are manifested in widespread metabolic disturbances whose variable characteristics are observed in enzymatic deficiencies, vesicant action, abnormal mitotic activity and cell division, bone marrow disruption, disturbances in hematopoietic activity and systemic poisoning. Indeed, mustard gas readily combines with various components of the cell such as amino acids, amines and proteins. Sulfur mustard has been shown to be mainly a lung carcinogen in various test animal species; this effect is highly dependent of size of the dose and the route of exposure. In the human, there is evidence of cancers of the respiratory tract in men exposed to mustard gas. Mutagenicity of sulfur mustard, due to the strong alkylating activity, has been reported to occur in many different species of animals, plants, bacteria, and fungi. There is no strong evidence that sulfur mustard is a teratogen but much further research, with particular emphasis on maternal and fetal toxicity, is needed and recommended.

  1. An isomer-specific high-energy collision-induced dissociation MS/MS database for forensic applications: a proof-of-concept on chemical warfare agent markers.

    Science.gov (United States)

    Subramaniam, Raja; Östin, Anders; Nygren, Yvonne; Juhlin, Lars; Nilsson, Calle; Åstot, Crister

    2011-09-01

    Spectra database search has become the most popular technique for the identification of unknown chemicals, minimizing the need for authentic reference chemicals. In the present study, an isomer-specific high-energy collision-induced dissociation (CID) MS/MS spectra database of 12 isomeric O-hexyl methylphosphonic acids (degradation markers of nerve agents) was created. Phosphonate anions were produced by the electrospray ionization of phosphonic acids or negative-ion chemical ionization of their fluorinated derivatives and were analysed in a hybrid magnetic-sector-time-of-flight tandem mass spectrometer. A centre-of-mass energy (E(com)) of 65 eV led to an optimal sequential carbon-carbon bond breakage, which was interpreted in terms of charge remote fragmentation. The proposed mechanism is discussed in comparison with the routinely used low-energy CID MS/MS. Even-mass (odd-electron) charge remote fragmentation ion series were diagnostic of the O-alkyl chain structure and can be used to interpret unknown spectra. Together with the odd-mass ion series, they formed highly reproducible, isomer-specific spectra that gave significantly higher database matches and probability factors (by 1.5 times) than did the EI MS spectra of the trimethylsilyl derivatives of the same isomers. In addition, ionization by negative-ion chemical ionization and electrospray ionization resulted in similar spectra, which further highlights the general potential of the high-energy CID MS/MS technique.

  2. Effectiveness and reaction networks of H2O2 vapor with NH3 gas for decontamination of the toxic warfare nerve agent, VX on a solid surface.

    Science.gov (United States)

    Gon Ryu, Sam; Wan Lee, Hae

    2015-01-01

    The nerve agent, O-ethyl S-[2-(diisopropylamino)ethyl] methylphosphonothioate (VX) must be promptly eliminated following its release into the environment because it is extremely toxic, can cause death within a few minutes after exposure, acts through direct skin contact as well as inhalation, and persists in the environment for several weeks after release. A mixture of hydrogen peroxide vapor and ammonia gas was examined as a decontaminant for the removal of VX on solid surfaces at ambient temperature, and the reaction products were analyzed by gas chromatography-mass spectrometry (GC-MS) and nuclear magnetic resonance spectrometry (NMR). All the VX on glass wool filter disks was found to be eliminated after 2 h of exposure to the decontaminant mixtures, and the primary decomposition product was determined to be non-toxic ethyl methylphosphonic acid (EMPA); no toxic S-[2-(diisopropylamino)ethyl] methylphosphonothioic acid (EA-2192), which is usually produced in traditional basic hydrolysis systems, was found to be formed. However, other by-products, such as toxic O-ethyl S-vinyl methylphosphonothioate and (2-diisopropylaminoethyl) vinyl disulfide, were detected up to 150 min of exposure to the decontaminant mixture; these by-products disappeared after 3 h. The two detected vinyl byproducts were identified first in this study with the decontamination system of liquid VX on solid surfaces using a mixture of hydrogen peroxide vapor and ammonia gas. The detailed decontamination reaction networks of VX on solid surfaces produced by the mixture of hydrogen peroxide vapor and ammonia gas were suggested based on the reaction products. These findings suggest that the mixture of hydrogen peroxide vapor and ammonia gas investigated in this study is an efficient decontaminant mixture for the removal of VX on solid surfaces at ambient temperature despite the formation of a toxic by-product in the reaction process.

  3. A comprehensive evaluation of the efficacy of leading oxime therapies in guinea pigs exposed to organophosphorus chemical warfare agents or pesticides

    Energy Technology Data Exchange (ETDEWEB)

    Wilhelm, Christina M., E-mail: wilhelmc@battelle.org [Battelle, 505 King Avenue, JM-7, Columbus, OH 43201-2693 (United States); Snider, Thomas H., E-mail: snidert@battelle.org [Battelle, 505 King Avenue, JM-7, Columbus, OH 43201-2693 (United States); Babin, Michael C., E-mail: babinm@battelle.org [Battelle, 505 King Avenue, JM-7, Columbus, OH 43201-2693 (United States); Jett, David A., E-mail: jettd@ninds.nih.gov [National Institutes of Health/National Institute of Neurological Disorders and Stroke, Bethesda, MD 20892 (United States); Platoff, Gennady E., E-mail: platoffg@niaid.nih.gov [National Institutes of Health/National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892 (United States); Yeung, David T., E-mail: dy70v@nih.gov [National Institutes of Health/National Institute of Neurological Disorders and Stroke, Bethesda, MD 20892 (United States)

    2014-12-15

    The currently fielded pre-hospital therapeutic regimen for the treatment of organophosphorus (OP) poisoning in the United States (U.S.) is the administration of atropine in combination with an oxime antidote (2-PAM Cl) to reactivate inhibited acetylcholinesterase (AChE). Depending on clinical symptoms, an anticonvulsant, e.g., diazepam, may also be administered. Unfortunately, 2-PAM Cl does not offer sufficient protection across the range of OP threat agents, and there is some question as to whether it is the most effective oxime compound available. The objective of the present study is to identify an oxime antidote, under standardized and comparable conditions, that offers protection at the FDA approved human equivalent dose (HED) of 2-PAM Cl against tabun (GA), sarin (GB), soman (GD), cyclosarin (GF), and VX, and the pesticides paraoxon, chlorpyrifos oxon, and phorate oxon. Male Hartley guinea pigs were subcutaneously challenged with a lethal level of OP and treated at approximately 1 min post challenge with atropine followed by equimolar oxime therapy (2-PAM Cl, HI-6 DMS, obidoxime Cl{sub 2}, TMB-4, MMB4-DMS, HLö-7 DMS, MINA, and RS194B) or therapeutic-index (TI) level therapy (HI-6 DMS, MMB4-DMS, MINA, and RS194B). Clinical signs of toxicity were observed for 24 h post challenge and blood cholinesterase [AChE and butyrylcholinesterase (BChE)] activity was analyzed utilizing a modified Ellman's method. When the oxime is standardized against the HED of 2-PAM Cl for guinea pigs, the evidence from clinical observations, lethality, quality of life (QOL) scores, and cholinesterase reactivation rates across all OPs indicated that MMB4 DMS and HLö-7 DMS were the two most consistently efficacious oximes. - Highlights: • First comprehensive evaluation of leading AChE oxime reactivators • All oximes are compared against current U.S. therapy 2-PAM Cl. • Relative therapeutic oxime efficacies against OP CWNA and pesticides • Contribution to more effective

  4. Establishing Cyber Warfare Doctrine

    Directory of Open Access Journals (Sweden)

    Andrew M. Colarik

    2012-01-01

    Full Text Available Over the past several decades, advances in technology have transformed communications and the ability to acquire, disseminate, and utilize information in a range of environments. Modern societies and their respective militaries have taken advantage of a robust information space through network-centric systems. Because military and commercial operations have increasingly converged, communication and information infrastructures are now high-priority military objectives in times of war. This article examines the theoretical underpinning of current cyber warfare research, what we have learned so far about its application, and some of the emerging themes to be considered; it also postulates the development of a (national cyber warfare doctrine (CWD. An endeavor of this scale requires lots of considerations and preparation for its development if it is to be cooperatively embraced. This article considers why information technology systems and their supporting infrastructures should be considered legitimate military targets in conflicts, and offers several events that support this supposition. In addition, it identifies the various forms of doctrine that will become the basis for developing a CWD, discusses a CWD's possible components, and proposes a national collaborative and discussion framework for obtaining a nation's stakeholder buy-in for such an endeavor.

  5. Decontamination of Water Containing Radiological Warfare Agents

    Science.gov (United States)

    1975-03-01

    fission, Stagg Stadium, University of Chicago. 16 Jul 45 - Alamagordo, New Mexico TRINITY shot, 19 kt. 5 Aug 45 - "Little Boy" atom bomb, Hliroshima...of New Mexico nuclear age. Nevada Test Site Nuclear 100 ki 4,700 shot Sedan - largest continental shot. Novaya Zemlya (USSR) Nuclear 50 u10 39,000...muultipurpose uInit capalli’ of producilg potable drinking water tromin •%haltev er ra%% water source may lie available. The rev•,rse sismos (1Ito

  6. Laboratory Aspects of Biological Warfare Agents

    Science.gov (United States)

    2016-01-01

    in cell-free media. The medium, acidified citrate cysteine medium [ACCM; citric acid /sodium citrate, L-cysteine, neopeptone, casamino acids ...Capable of normal completion of life cycle . Viral coat protein - A protein present in the layer surrounding the nucleic acid core of a virus...19 Nucleic Acid

  7. The ethics of information warfare

    CERN Document Server

    Floridi, Luciano

    2014-01-01

    This book offers an overview of the ethical problems posed by Information Warfare, and of the different approaches and methods used to solve them, in order to provide the reader with a better grasp of the ethical conundrums posed by this new form of warfare.The volume is divided into three parts, each comprising four chapters. The first part focuses on issues pertaining to the concept of Information Warfare and the clarifications that need to be made in order to address its ethical implications. The second part collects contributions focusing on Just War Theory and its application to the case of Information Warfare. The third part adopts alternative approaches to Just War Theory for analysing the ethical implications of this phenomenon. Finally, an afterword by Neelie Kroes - Vice President of the European Commission and European Digital Agenda Commissioner - concludes the volume. Her contribution describes the interests and commitments of the European Digital Agenda with respect to research for the developme...

  8. Airpower Support to Unconventional Warfare

    Science.gov (United States)

    2009-12-11

    supplies to isolated mountain outposts (Trest 2000, 109). The Helio Couriers operated out of small dirt strips, referred to as lima sites, usually... rosa : The O.S.S. and American espionage. New York: Reynal and Hitchcock. AF Special Operations Command white paper. 2007. USAF irregular warfare...Symposium on the role of airpower in counterinsurgency and unconventional warfare: A brief summary of viewpoints. Santa Monica, CA: The RAND

  9. Percutaneous toxicity and decontamination of soman, VX, and paraoxon in rats using detergents.

    Science.gov (United States)

    Misík, Jan; Pavliková, Růžena; Kuča, Kamil

    2013-06-01

    Highly toxic organophosphorus compounds (OPs) were originally developed for warfare or as agricultural pesticides. Today, OPs represent a serious threat to military personnel and civilians. This study investigates the in vivo decontamination of male Wistar rats percutaneously exposed to paraoxon and two potent nerve agents--soman (GD) and VX. Four commercial detergents were tested as decontaminants--Neodekont(TM), Argos(TM), Dermogel(TM), and FloraFree(TM). Decontamination performed 2 min after exposure resulted in a higher survival rate in comparison with non-decontaminated controls. The decontamination effectiveness was expressed as protective ratio (PR, median lethal dose of agent in decontaminated animals divided by the median lethal dose of agent in untreated animals). The highest decontamination effectiveness was consistently achieved with Argos(TM) (PR=2.3 to 64.8), followed by Dermogel(TM) (PR=2.4 to 46.1). Neodekont(TM) and FloraFree(TM) provided the lowest decontamination effectiveness, equivalent to distilled water (PR=1.0 to 43.2).

  10. Percutaneous cholecystostomy

    Energy Technology Data Exchange (ETDEWEB)

    Akhan, Okan E-mail: akhano@tr.net; Akinci, Devrim; Oezmen, Mustafa N

    2002-09-01

    Percutaneous cholecystostomy (PC), a technique that consists of percutaneous catheter placement in the gallbladder lumen under imaging guidance, has become an alternative to surgical cholecystostomy in recent years. Indications of PC include calculous or acalculous cholecystitis, cholangitis, biliary obstruction and opacification of biliary ducts. It also provides a potential route for stone dissolution therapy and stone extraction. Under aseptic conditions and ultrasound guidance, using local anesthesia, the procedure is carried out by using either modified Seldinger technique or trocar technique. Transhepatic or transperitoneal puncture can be performed as an access route. Several days after the procedure transcatheter cholangiography is performed to assess the patency of cystic duct, presence of gallstones and catheter position. The tract is considered mature in the absence of leakage to the peritoneal cavity, subhepatic, subcapsular, or subdiaphragmatic spaces. Response rates to PC in the literature are between the range of 56-100% as the variation of different patient population. Complications associated with PC usually occur immediately or within days and include haemorrhage, vagal reactions, sepsis, bile peritonitis, pneumothorax, perforation of the intestinal loop, secondary infection or colonisation of the gallbladder and catheter dislodgment. Late complications have been reported as catheter dislodgment and recurrent cholecystitis. PC under ultrasonographic guidance is a cost-effective, easy to perform and reliable procedure with low complication and high success rates for critically ill patients with acute cholecystitis. It is generally followed by elective cholecystectomy, if possible. However, it may be definitive treatment, especially in acalculous cholecystitis.

  11. ISIL's Hybrid Warfare in Syria & Iraq

    DEFF Research Database (Denmark)

    Sørensen, Heine

    2016-01-01

    The case study specifically seeks to answer the following problem statement: Does ISIL qualify as an actor using hybrid warfare and if so what characterizes their particular use of this type of warfare? Based on an analysis of ISIL’s warfare from August 2012 to August 2016 the chapter argues, tha...

  12. Percutaneous tracheostomy

    Directory of Open Access Journals (Sweden)

    Chitra Mehta

    2017-01-01

    Full Text Available Percutaneous dilatational tracheostomy (PDT is a commonly performed procedure in critically sick patients. It can be safely performed bedside by intensivists.This has resulted in decline in the use of surgical tracheostomy in intensive care unit (ICU except in few selected cases. Most common indication of tracheostomy in ICU is need for prolonged ventilation. About 10% of patients requiring at least 3 days of mechanical ventilator support get tracheostomised during ICU stay. The ideal timing of PDT remains undecided at present. Contraindications and complications become fewer with increase in experience. Various methods of performing PDT have been discovered in last two decades. Preoperative work up, patient selection and post tracheostomy care form key components of a successful PDT. Bronchoscopy and ultrasound have been found to be useful procedural adjuncts, especially in presence of unfavorable anatomy. This article gives a brief overview about the use of PDT in ICU.

  13. Percutaneous gastroenterostomy

    Energy Technology Data Exchange (ETDEWEB)

    Wittich, G.R.; Van Sonnenberg, E.; Casola, G.; Jantsch, H.; Walter, R.; Lechner, G.

    1987-05-01

    Percutaneous gastrostomies or gastroenterostomies serve for temporary or permanent enteric feeding in patients with obstruction or functional derangement of the esophagus or hypopharynx. In addition, this radiological procedure may be indicated for small bowel decompression. The authors present their experience in 71 patients. Insufflation of air through a nasogastric tube or catheter is the preferred method for gastric distension. The inferior margin of the left lobe of the liver and the transverse colon are localized sonographically and fluoroscopically prior to puncture. Either Seldinger or Trocartechniques have proven effective in establishing access to the stomach. The feeding tube is advanced into the proximal jejunum to reduce the likelyhood of gastroesophageal reflux and possible aspiration. Complications were encountered in four patients and included catheter dislocation in three and respiratory distress in one patient.

  14. The ethics of drone warfare

    Directory of Open Access Journals (Sweden)

    Fatić Aleksandar

    2017-01-01

    Full Text Available The paper investigates the compatibility of the modern technologies of warfare, specifically the use of offensive drones, with traditional military ethics and suggests that the new technologies radically change the value system of the military in ways which make large parts of the traditional military ethics inapplicable. The author suggests that Agamben’s concept of ‘effectivity’ through ‘special actions’ which mark one’s belonging to a particular community or profession is a useful conceptual strategy to explore the compatibility of drone warfare with traditional military ethics; this strategy shows mixed results at best.

  15. Percutaneous Achilles Tendon Lengthening

    Science.gov (United States)

    ... All Site Content AOFAS / FootCareMD / Treatments Percutaneous Achilles Tendon Lengthening Page Content ​ Pre-operative incision markings along ... What is the goal of a percutaneous Achilles tendon lengthening? The goal of this procedure is to ...

  16. Percutaneous Abscess Drainage

    Science.gov (United States)

    ... Physician Resources Professions Site Index A-Z Percutaneous Abscess Drainage An abscess is an infected fluid collection ... are the benefits vs. risks? What is Percutaneous Abscess Drainage? An abscess is an infected fluid collection ...

  17. The Anatomy of Counterinsurgency Warfare

    DEFF Research Database (Denmark)

    Ringsmose, Jens; Pedersen, Kenneth

    Since the beginning of the new millennium, the West has been increasingly involved in a tiresome and rather particular type of conflict: insurgency warfare. The bloody and shocking terrorist attacks on New York and Washington in September 2001 marked the beginning of a new era, and the introducti...

  18. Evolutionary Models of Irregular Warfare

    Science.gov (United States)

    2013-03-01

    G. (2010) Decentralize, adapt and cooperate. Nature 465:292-293. Sagarin, R. (2012) Learning From the Octopus : How Secrets from Nature Can Help Us...because the concepts map on to important features of modern irregular warfare. For example, small-scale behaviors are increasingly thought to

  19. Toxicokinetics of the nerve agent (±)-VX in anesthetized and atropinized hairless guinea pigs and marmosets after intravenous and percutaneous administration

    NARCIS (Netherlands)

    Schans, M.J. van der; Lander, B.J.; Wiel, H. van der; Langenberg, J.P.; Benschop, H.P.

    2003-01-01

    In continuation of our investigations on the toxicokinetics of the volatile nerve agents C(±)P(±)-soman and (±)-sarin, we now report on the toxicokinetics of the rather nonvolatile agent (±)-VX. A validated method was developed to determine blood levels of (±)-VX by means of achiral gas chromatograp

  20. Cutaneous reactions in nuclear, biological and chemical warfare

    Directory of Open Access Journals (Sweden)

    Arora Sandeep

    2005-03-01

    Full Text Available Nuclear, biological and chemical warfare have in recent times been responsible for an increasing number of otherwise rare dermatoses. Many nations are now maintaining overt and clandestine stockpiles of such arsenal. With increasing terrorist threats, these agents of mass destruction pose a risk to the civilian population. Nuclear and chemical attacks manifest immediately while biological attacks manifest later. Chemical and biological attacks pose a significant risk to the attending medical personnel. The large scale of anticipated casualties in the event of such an occurrence would need the expertise of all physicians, including dermatologists, both military and civilian. Dermatologists are uniquely qualified in this respect. This article aims at presenting a review of the cutaneous manifestations in nuclear, chemical and biological warfare and their management.

  1. MEANS AND METHODS OF CYBER WARFARE

    Directory of Open Access Journals (Sweden)

    Dan-Iulian VOITAȘEC

    2016-06-01

    Full Text Available According to the Declaration of Saint Petersburg of 1868 “the only legitimate object which States should endeavor to accomplish during war is to weaken the military forces of the enemy”. Thus, International Humanitarian Law prohibits or limits the use of certain means and methods of warfare. The rapid development of technology has led to the emergence of a new dimension of warfare. The cyber aspect of armed conflict has led to the development of new means and methods of warfare. The purpose of this paper is to study how the norms of international humanitarian law apply to the means and methods of cyber warfare.

  2. Cyber warfare building the scientific foundation

    CERN Document Server

    Jajodia, Sushil; Subrahmanian, VS; Swarup, Vipin; Wang, Cliff

    2015-01-01

    This book features a wide spectrum of the latest computer science research relating to cyber warfare, including military and policy dimensions. It is the first book to explore the scientific foundation of cyber warfare and features research from the areas of artificial intelligence, game theory, programming languages, graph theory and more. The high-level approach and emphasis on scientific rigor provides insights on ways to improve cyber warfare defense worldwide. Cyber Warfare: Building the Scientific Foundation targets researchers and practitioners working in cyber security, especially gove

  3. Roots of Russian Irregular Warfare

    Science.gov (United States)

    2016-12-01

    concluded that the United States has a national policy gap in our own ability to wage “unconventional warfare in the gray zone.”3 That statement...advancing army—few have studied the irregular nature of the campaign waged against Napoleon. Napoleon’s overstretched logistics and the elusiveness of...94 Karl E. Meyer and Shareen Blair Brysac, Tournament of Shadows: The Great Game and the Race for Empire in Central Asia (Washington, DC: Basic

  4. Rethinking Cultural Influences on Warfare

    Science.gov (United States)

    2012-05-17

    militaries turn toward understanding culture as an important corrective action to naive ethnocentrism , but warns about the dangers of... Ethnocentrism (Holmes and Meier, 1979); Robert E. Harkavy and Stephanie G. Neuman, Warfare in the Third World (Palgrave, 2001); more recently, Mary...influence of ethnocentrism and the mirror imaging of our cultural values on to another culture with its own history. Scholars according to John Ferris

  5. Air Power in Irregular Warfare

    Science.gov (United States)

    2012-12-01

    Intelligence, Surveillance, and Reconnaisance IW Irregular Warfare JFC Joint Force Commander JP Joint Publication xii MCP Malayan Communist Party...being or acting in accord with laws , rules, or established custom.”5 Combined with the Clausewitzian definition of war as “an act of violence meant...Quarterly and Defence Journal , October, 1920), accessed March 21, 2012, http://usacac.army.mil/cac2/cgsc/carl/download/csipubs/lawrence.pdf, 17. 22 Bruce

  6. Electronic warfare target location methods

    CERN Document Server

    Poisel, Richard

    2012-01-01

    Describing the mathematical development underlying current and classical methods of geolocating electronic systems that are emitting, this newly revised and greatly expanded edition of a classic Artech House book offers practical guidance in electronic warfare target location. The Second Edition features a wealth of additional material including new chapters on time delay estimation, direction finding techniques, and the MUSIC algorithm. This practical resource provides you with critical design information on geolocation algorithms, and establishes the fundamentals of existing algorithms as a

  7. Russia’s Approach to Cyber Warfare

    Science.gov (United States)

    2016-09-01

    psychological operations, and information operations. • In keeping with traditional Soviet notions of battling constant threats from abroad and within...theorists, is a holistic concept that includes computer network operations, electronic warfare, psychological operations, and information operations.3...that “in the ongoing revolution in information technologies, information and psychological warfare will largely lay the groundwork for victory.”10

  8. Radiologic imaging and percutaneous treatment of pelvic lymphocele

    Energy Technology Data Exchange (ETDEWEB)

    Karcaaltincaba, Musturay [Department of Radiology, Division of Abdominal and Interventional Radiology, Hacettepe University School of Medicine, Sihhiye, Ankara 06100 (Turkey); Akhan, Okan [Department of Radiology, Division of Abdominal and Interventional Radiology, Hacettepe University School of Medicine, Sihhiye, Ankara 06100 (Turkey)]. E-mail: oakhan@hacettepe.edu.tr

    2005-09-01

    Pelvic lymphocele, also known as lymphocyst, is a cystic structure caused by lymphatic injury usually secondary to pelvic lymphadenectomy and renal transplantation. Lymphoceles can cause morbidity and rarely mortality by compression of adjacent structures and infectious complications. This review discusses etiology and treatment options for pelvic lymphoceles including surgical and percutaneous methods with emphasis on percutaneous techniques particularly in conjunction with sclerotherapy. Percutaneous catheter drainage with sclerotherapy procedure with various sclerosing agents is described in detail. Ethanol, povidone-iodine, tetracycline, doxycycline, bleomycin, talc and fibrin glue can be used as sclerosing agents. Combination of sclerosing agents to percutaneous catheter drainage significantly improves success rate in the treatment of pelvic lymphoceles. Infected lymphoceles are usually treated solely with percutaneous catheter drainage. Percutaneous treatment can be tailored according to volume of lymphoceles. We generally prefer single session sclerotherapy and 1 day catheter drainage in lymphoceles less than 150 mL, and larger ones are treated by multi-session sclerotherapy until daily drainage decreases below 10 mL. Percutaneous treatment preferably with sclerotherapy should be considered as the first-line treatment modality for pelvic lymphoceles due to its effectiveness, widespread applicability on an outpatient basis, ease of procedure and low complication rate.

  9. Chemical and biological warfare: Detection and warning systems. (Latest citations from the NTIS bibliographic database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-10-01

    The bibliography contains citations concerning the detection, identification, verification, and warning systems of chemical and biological warfare agents. Citations discuss agents sampling, monitoring, and assessment. Techniques include chromotography, biosensing, chemical analysis, and DNA probes. Land pollution, soil tests, and skin protection are examined. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  10. Chemical and biological warfare: Biology, chemistry, and toxicology. (Latest citations from the NTIS bibliographic database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-10-01

    The bibliography contains citations concerning the physiological effects, physicochemical effects, and toxicology of chemical and biological warfare agents. Citations discuss toxic chemicals, chemical agent simulants, detoxification and decontamination, environmental toxicity, and land pollution. Detection techniques and warning systems are examined in a separate bibliography. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  11. Chemical and biological warfare: Biology, chemistry, and toxicology. (Latest citations from the NTIS bibliographic database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-11-01

    The bibliography contains citations concerning the physiological effects, physicochemical effects, and toxicology of chemical and biological warfare agents. Citations discuss toxic chemicals, chemical agent simulants, detoxification and decontamination, environmental toxicity, and land pollution. Detection techniques and warning systems are examined in a separate bibliography. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  12. Women and Warfare in Pre-Colonial Akokoland

    Directory of Open Access Journals (Sweden)

    Olusanya Faboyede

    2013-06-01

    Full Text Available In pre-colonial Akokoland, the most conspicuous fact about its political economy and peace was security challenges and mismanagement through internal and external manipulation. This paper analyses the role of women in warfare in pre-colonial Akokoland as a potential to integrate Akokoland, a multi-cultural community for productive and sustained effort to promote economic development in the region. Thus, the paper is conceptualised on historical objectivity. The paper argues that one of the ways of dealing with the scale of insecurity in the society is to assimilate historical thinking into the intention of the security agents (women warriors.

  13. Comparative biorelease study of fluticasone in combination with antibacterial (Neomycin and or antifungal (coltrimazol, miconazole agents by histamine percutaneous reaction method in healthy volunteers

    Directory of Open Access Journals (Sweden)

    Shahani S

    1997-01-01

    Full Text Available Fluticasone propionate is a novel, potent and topically active synthetic corticosteroid preparation with a much reduced potential, in relation to its anti-inflammatory potency, for unwanted systemic side effects. It is indicated for the treatment of eczema, dermatitis etc. The objective of the present study was to evaluate and compare the biorelease of fluticassone with placebo (base formulation; its combination with antifungal (miconazole, clotrimazole and / or antibacterial agents based on the attenuation of histamine induced wheal and flare reaction and flare intensity (on visual analouge scale by McNemar test. In the present study, fluticasone alone and in combination with clotrimazole, miconazole and neomycin significantly reduced the wheal and flare response of histamine prick test. The flare intensity response was also significantly inhibited by these treatments. Furthermore, there was no difference in the anti-inflammatory activity of various treatment groups. It may, therefore, be concluded that antibacterial (neomycin and / or antifungal (miconazole, clotrimazole agents in combination with steroid (fluticasone do not alter the pharmacodynamic response of the latter.

  14. The Art of Aerial Warfare

    Science.gov (United States)

    2005-03-01

    the  Strait  of  Gibraltar   from  North  Africa  during  the Spanish Civil War. 11 FAIRCHILD PAPER A Comparison of Aerial Warfare to Land... Hitler , for example, the United States cannot assume that Nazi aggression would have  evaporated  instantly. Although  Hitler himself profoundly affected

  15. WARFARE IN THE INFORMATION AGE

    Directory of Open Access Journals (Sweden)

    Laurian GHERMAN

    2010-01-01

    Full Text Available The paper is focused on changes occurred in military organizations in Information Age. During Industrial Age the military structure of forces evolved according with principles of decomposition, specialization, hierarchy, optimization, deconfliction, centralized planning, and decentralized execution. But now the solutions based upon Industrial Age assumptions and practices will break down and fail in the Information Age. This will happen no matter how well intentioned, hardworking, or dedicated the leadership and the force are. Two key force capabilities needed by Information Age militaries are interoperability and agility. Both interoperability and agility are provided by Network centric warfare theory of war.

  16. Information warfare technologies in political discourse

    Directory of Open Access Journals (Sweden)

    Karpova Anna Yu.

    2016-01-01

    Full Text Available We attempt to examine the technology of «information warfare» in this paper. The dominant theme of the paper is that the outcome of the information warfare is important not only for the future of a state itself but for the future of the world balance of forces. The main task of geopolitical actors in information warfare is to introduce ideas corresponding to their interests into mass consciousness. All participants of political conflicts have common features in technologies of Information warfare. The information anomie is the indicator of the great geopolitical actors’ personified interests on the stage of «information warfare» - the process resulted in destroying the communicative line: report-information understanding and disrupting the social order in society. In this paper authors describe the following Information Warfare technologies: "Political volcano" technology; "SPIN" technology; "Widening media resource" technology; "specific gravity" technology; "Cold War 2.0" technology and Information cleaningup technology. It is assumed that in the future there will be new instructions on applying technologies of information warfare. To impart perspective to the paper we consider examples, opinions and trends.

  17. Percutaneous mitral valve repair.

    Science.gov (United States)

    Gillinov, A Marc; Liddicoat, John R

    2006-01-01

    Surgical mitral valve repair is the procedure of choice to treat mitral regurgitation of all etiologies. Whereas annuloplasty is the cornerstone of mitral valve repair, a variety of other surgical techniques are utilized to correct dysfunction of the leaflets and subvalvular apparatus; in most cases, surgical repair entails application of multiple repair techniques in each patient. Preclinical studies and early human experience have demonstrated that some of these surgical repair techniques can be performed using percutaneous approaches. Specifically, there has been great progress in the development of novel technology to facilitate percutaneous annuloplasty and percutaneous edge-to-edge repair. The objectives of this report were to (1) discuss the surgical foundations for these percutaneous approaches; (2) review device design and experimental and clinical results of percutaneous valve repair; and (3) address future directions, including the key challenges of patient selection and clinical trial design.

  18. History of biological warfare and bioterrorism.

    Science.gov (United States)

    Barras, V; Greub, G

    2014-06-01

    Bioterrorism literally means using microorganisms or infected samples to cause terror and panic in populations. Bioterrorism had already started 14 centuries before Christ, when the Hittites sent infected rams to their enemies. However, apart from some rare well-documented events, it is often very difficult for historians and microbiologists to differentiate natural epidemics from alleged biological attacks, because: (i) little information is available for times before the advent of modern microbiology; (ii) truth may be manipulated for political reasons, especially for a hot topic such as a biological attack; and (iii) the passage of time may also have distorted the reality of the past. Nevertheless, we have tried to provide to clinical microbiologists an overview of some likely biological warfare that occurred before the 18th century and that included the intentional spread of epidemic diseases such as tularaemia, plague, malaria, smallpox, yellow fever, and leprosy. We also summarize the main events that occurred during the modern microbiology era, from World War I to the recent 'anthrax letters' that followed the World Trade Center attack of September 2001. Again, the political polemic surrounding the use of infectious agents as a weapon may distort the truth. This is nicely exemplified by the Sverdlovsk accident, which was initially attributed by the authorities to a natural foodborne outbreak, and was officially recognized as having a military cause only 13 years later.

  19. Grid architecture model of network centric warfare

    Institute of Scientific and Technical Information of China (English)

    Yan Tihua; Wang Baoshu

    2006-01-01

    NCW(network centric warfare) is an information warfare concentrating on network. A global network-centric warfare architecture with OGSA grid technology is put forward, which is a four levels system including the user level, the application level, the grid middleware layer and the resource level. In grid middleware layer, based on virtual hosting environment, a BEPL4WS grid service composition method is introduced. In addition, the NCW grid service model is built with the help of Eclipse-SDK-3.0.1 and Bpws4j.

  20. Percutaneous forefoot surgery.

    Science.gov (United States)

    Bauer, T

    2014-02-01

    Percutaneous methods can be used to perform many surgical procedures on the soft tissues and bones of the forefoot, thereby providing treatment options for all the disorders and deformities seen at this site. Theoretical advantages of percutaneous surgery include lower morbidity rates and faster recovery with immediate weight bearing. Disadvantages are the requirement for specific equipment, specific requirements for post-operative management, and lengthy learning curve. At present, percutaneous hallux valgus correction is mainly achieved with chevron osteotomy of the first metatarsal, for which internal fixation and a minimally invasive approach (2 cm incision) seem reliable and reproducible. This procedure is currently the focus of research and evaluation. Percutaneous surgery for hallux rigidus is simple and provides similar outcomes to those of open surgery. Lateral metatarsal malalignment and toe deformities are good indications for percutaneous treatment, which produces results similar to those of conventional surgery with lower morbidity rates. Finally, fifth ray abnormalities are currently the ideal indication for percutaneous surgery, given the simplicity of the procedure and post-operative course, high reliability, and very low rate of iatrogenic complications. The most commonly performed percutaneous techniques are described herein, with their current indications, main outcomes, and recent developments.

  1. Evanescent planar waveguide detection of biological warfare simulants

    Science.gov (United States)

    Sipe, David M.; Schoonmaker, Kenneth P.; Herron, James N.; Mostert, Michael J.

    2000-04-01

    An evanescent planar waveguide Mark 1.5 instrument was used to detect simulants of biological warfare agents; ovalbumin (OV), MS2 bacteriophage, BG, and Erwinia herbicola (EH). Polyclonal tracer antibodies were labeled with the fluorescent dye, Cy5. Discrete bands of polyclonal capture antibodies were immobilized to a polystyrene planar waveguide with molded integral lenses. An ST-6 CCD camera was used for detection. OV. MS2 and BG were detected in a simultaneous 3 by 3 array; with a total of nine measurements within 6 minutes. EH was analyzed in a separate array. Results were evaluate dat the US Army Joint Field Trials V, at the Dugway Proving Grounds. Over a 10 day period, 32 unknown samples were analyzed daily for each simulant. Detection limits: OV 10 ng/ml, MS2 107 pfu/ml, BG 105 cfu/ml. EH was detectable at 5 X 105 cfu/ml. Overall false positives were 3.0 percent. Therefore, the Mark 1.5 instrument, with a parallel array of detectors, evanescent flourescent excitation, and CCD imaging provides for rapid, sensitive, and specific detection of biological warfare agent simulants.

  2. A Taxonomy of Network Centric Warfare Architectures

    Science.gov (United States)

    2008-01-01

    Distributed Database Theory, an area of Computer Science that has studied information flow in networks extensively ( Ceri & Pelagatti 1984, Mullender 1993...Australian Department of Defence, 2003, Australian Defence Force Network Centric Warfare Roadmap (First Draft), September. Ceri , S. & Pelagatti

  3. Topic modelling in the information warfare domain

    CSIR Research Space (South Africa)

    De Waal, A

    2013-11-01

    Full Text Available In this paper the authors provide context to Topic Modelling as an Information Warfare technique. Topic modelling is a technique that discovers latent topics in unstructured and unlabelled collection of documents. The topic structure can be searched...

  4. A Dialectic for Network Centric Warfare

    Science.gov (United States)

    2005-06-01

    Giffin, 2003; Borgu , 2003; Kaufman, 2004). For example, from a standpoint of Popperian methodological falsificationism (Popper, 1934), Reid and...focused term network-centric warfare has common favor ( Borgu , 2003) despite the organisational decree to use the term ‘network centric warfare...Commonwealth Department of Defence, June. Borgu , A., (2003), “The Challenges and Limitations of Network Centric Warfare”, Presented at NCW: Improving ADF

  5. Finding Lawrence recruiting talent for unconventional warfare

    OpenAIRE

    Mourouzis, Michael G.

    2011-01-01

    Approved for public release; distribution is unlimited. From Francis Marion's guerrilla war against the British to advising the resistance against the Nazis and Japanese, the United States has depended on unconventional warfare (UW) as a component of national defense. Today, the U.S. Army Special Forces (SF) is the premiere unconventional warfare unit in the U.S. military. With a smaller Army and increasing missions, SF must expand its recruiting efforts. This thesis analyzes the recruitme...

  6. Cyber Warfare: New Character with Strategic Results

    Science.gov (United States)

    2013-03-01

    defense ( CND ).”7 Thus cyber warfare is distinguished from cyber criminal acts based upon its coercive nature to attain a strategic end, whereas...CNA and CND . Conceptually, CNA effects “range from disrupting the adversary’s electronic systems and what operations they enable (communications...or self-destruct.”10 The second component of cyber warfare seeks to eliminate or minimize the risk of the first. The role of CND is to defend

  7. UML modelling of network warfare examples

    CSIR Research Space (South Africa)

    Veerasamy, N

    2011-08-01

    Full Text Available , Analysis, Development and Maintenance [6] [12] [13]. Furthermore, Baker and Harris also discuss techniques like Intrusion Prevention, Personnel Security and Security Awareness as part of information security [14] [12]. Moreover, when considering... techniques that are core to information security and to Network Warfare were thus identified. The following summary of the techniques found in Network Warfare is given: Risk Analysis, Intrusion Prevention, Physical Security, Personnel Security, Cyber...

  8. Hybrid Warfare: Implications for CAF Force Development

    Science.gov (United States)

    2014-08-01

    also McCulloh and Johnson who demonstrate throughout their study that context is critical . Indeed, their summary statement for “hybrid warfare theory ...Muhr, eds., Hybrid and Cyber War as Consequences of the Asymmetry, Frankfurt : Peter Lang, 2011, p.95. Interestingly, the CFD Hybrid Warfare Concept...the highest political and military levels. The study of hybrid-type case studies yields the critical lesson that: “leadership is essential to victory

  9. Intrafamily and intragenomic conflicts in human warfare

    Science.gov (United States)

    2017-01-01

    Recent years have seen an explosion of multidisciplinary interest in ancient human warfare. Theory has emphasized a key role for kin-selected cooperation, modulated by sex-specific demography, in explaining intergroup violence. However, conflicts of interest remain a relatively underexplored factor in the evolutionary-ecological study of warfare, with little consideration given to which parties influence the decision to go to war and how their motivations may differ. We develop a mathematical model to investigate the interplay between sex-specific demography and human warfare, showing that: the ecology of warfare drives the evolution of sex-biased dispersal; sex-biased dispersal modulates intrafamily and intragenomic conflicts in relation to warfare; intragenomic conflict drives parent-of-origin-specific patterns of gene expression—i.e. ‘genomic imprinting’—in relation to warfare phenotypes; and an ecological perspective of conflicts at the levels of the gene, individual, and social group yields novel predictions as to pathologies associated with mutations and epimutations at loci underpinning human violence. PMID:28228515

  10. In vivo decontamination of the nerve agent VX using the domestic swine model.

    Science.gov (United States)

    Misik, Jan; Pavlik, Michal; Novotny, Ladislav; Pavlikova, Ruzena; Chilcott, Robert P; Cabal, Jiri; Kuca, Kamil

    2012-11-01

    The purpose of this in vivo study was to assess a new, putatively optimised method for mass casualty decontamination ("ORCHIDS protocol") for effectiveness in removing the chemical warfare agent VX from the skin of anaesthetised, domestic white pigs. ORCHIDS protocol consists of a 1.5-minute shower with a mild detergent (Argos™) supplemented by physical removal. A standard method of wet decontamination was used for comparison. Experimental animals were divided into four groups (A-D). Two groups were exposed to a supra-lethal percutaneous dose (5 × LD(50); 300 μg kg(-1)) of VX for 1 h prior to decontamination with either the ORCHIDS (C) or standard protocol (D). A third (B, positive control) group was exposed but not subject to decontamination. Blank controls (A) received anaesthesia and the corresponding dose of normal saline instead of VX. Observations of the clinical signs of intoxication were supplemented by measurements of whole blood cholinesterase (ChE) performed on samples of arterial blood acquired at 30-minute intervals for the duration of the study (up to 6 h). Untreated (B) animals displayed typical cholinergic signs consistent with VX intoxication (local fasciculation, mastication, salivation, pilo-erection and motor convulsions) and died 165-240 min post exposure. All animals in both decontamination treatment groups (C, D) survived the duration of the study and exhibited less severe signs of cholinergic poisoning. Thus, both the standard and ORCHIDS protocol were demonstrably effective against exposure to the potent nerve agent VX, even after a delay of 1 h. A critical advantage of the ORCHIDS protocol is the relatively short shower duration (1½ min compared to 3 min). In practice, this could substantially improve the rate at which individuals could be decontaminated by emergency responders following exposure to toxic materials such as chemical warfare agents.

  11. Percutaneous liver biopsy.

    Science.gov (United States)

    Rustagi, Tarun; Newton, Eric; Kar, Premashish

    2010-01-01

    Percutaneous liver biopsy has been performed for more than 120 years, and remains an important diagnostic procedure for the management of hepatobiliary disorders. Modern biochemical, immunologic, and radiographic techniques have facilitated the diagnosis and management of liver diseases but have not made liver biopsy obsolete. This comprehensive review article will discuss the history of development of percutaneous liver biopsy, its indications, contraindications, complications and the various aspects of the biopsy procedure in detail.

  12. Towards a framework for a network warfare capability

    CSIR Research Space (South Africa)

    Veerasamy, N

    2008-07-01

    Full Text Available aspects to its network enabled capabilities and functionality (network warfare). Various computer and information security practices form part of network warfare techniques. Whilst various information and security practices are well-known and applied...

  13. Integrated Assessment Systems for Chemical Warfare Material

    Energy Technology Data Exchange (ETDEWEB)

    A. M. Snyder; D. A. Verrill; G. L. Thinnes; K. D. Watts; R. J. McMorland

    1999-05-27

    The US Army must respond to a variety of situations involving suspect discovered, recovered, stored, and buried chemical warfare materiel (CWM). In some cases, the identity of the fill materiel and the status of the fusing and firing train cannot be visually determined due to aging of the container, or because the item is contained in an over-pack. In these cases, non-intrusive assessments are required to provide information to allow safe handling, storage, and disposal of the materiel. This paper will provide an overview of the integrated mobile and facility-based CWM assessment system prototypes that have been, and are being developed, at the Idaho National Engineering and Environmental Laboratory (INEEL) for the US Army Non-Stockpile Chemical Materiel Project. In addition, this paper will discuss advanced sensors being developed to enhance the capability of the existing and future assessment systems. The Phase I Mobile Munitions Assessment System (MMAS) is currently being used by the Army's Technical Escort Unit (TEU) at Dugway Proving Ground, Utah. This system includes equipment for non-intrusively identifying the munitions fill materiel and for assessing the condition and stability of the fuzes, firing trains, and other potential safety hazards. The system provides a self-contained, integrated command post including an on-board computer system, communications equipment, video and photographic equipment, weather monitoring equipment, and miscellaneous safety-related equipment. The Phase II MMAS is currently being tested and qualified for use by the INEEL and the US Army. The Phase II system contains several new assessment systems that significantly enhance the ability to assess CWM. A facility-based munitions assessment system prototype is being developed for the assessment of CWM stored in igloos at Pine Bluff Arsenal, Arkansas. This system is currently in the design and fabrication stages. Numerous CWM advanced sensors are being developed and tested, and

  14. Biological warfare in a historical perspective.

    Science.gov (United States)

    Roffey, R; Tegnell, A; Elgh, F

    2002-08-01

    There are some early examples of biological warfare (BW), but in modern times it was used first for sabotage by Germany during WWI. Development of biological weapons on a military significant scale was initiated in several countries in the period between the world wars. During WWII, several countries had active programs such as the USA, UK, Canada, Germany, Japan and the Soviet Union. It was only Japan that on a fairly large scale used BW. The US program continued until 1969, when President Nixon took a decision to end it in connection with signing the BTWC. The Soviet Union had also continued its program after the war, and this was enhanced after signing the BTWC: in the 1980s the program consisted of around fifty facilities and involved around 60,000 people. The Soviet Union produced and maintained a large stockpile of BW-agents. After the collapse of the Soviet Union, and due to pressure from USA and UK, President Yeltsin issued a decree in 1992 banning continued offensive BW activity. However, there are still concerns of residual activity in Russia. Another program of concern is the Iraqi BW-program. After 10 years of UN inspections that were stopped in 1998, there are still many unanswered questions concerning the BW program. There was also a covert BW-program in South Africa that was terminated around 1993. There have also been a number of allegations of alleged use or possession. In addition, there are indications that 10-12 states are now trying to acquire BW, and this assessment is based on intelligence information, mainly from the USA. For example Iraq, North Korea, Iran, Syria, Sudan and Libya. Another aspect is the strong driving force of technology developments to promote this type of program, opening new risks for future potential military misuse.

  15. Hybrid Warfare: A Military Revolution or Revolution in Military Affairs?

    Science.gov (United States)

    2012-12-14

    warfare intersect and blend to create a new form of warfare. This thesis uses the Williamson Murray and McGregor Knox definitions of Military...irregular warfare intersect and blend to create a new form of warfare. This thesis uses the Williamson Murray and McGregor Knox definitions of...understand new concepts. Douglas C Lovelace. Director Strategic Studies Institute has this insight to offer regarding the importance of

  16. Motivation and requirements for determining a Network Warfare Capability

    CSIR Research Space (South Africa)

    Veerasamy, N

    2010-06-01

    Full Text Available to prevent misconceptions, as well as to ensure that the necessary input data is incorporated. They include the following: • The involved parties must grasp the difference between auditing and determining a Network Warfare Capability. It is encouraged... to incorporate the use of auditing in the technique set underlying Network Warfare. • To determine a Network Warfare Capability, assessments of the various techniques that contribute to Network Warfare are necessary. This will incorporate expert opinion...

  17. [The history of biological warfare].

    Science.gov (United States)

    Cohen, Amir; Robenshtok, Eyal; Rotman, Eran; Sagi, Rami

    2002-05-01

    Selected events in the history of biological weapons are highlighted to increase the physician's awareness of this crucial threat. The deliberate use of biological substances originated in antiquity and has pervaded the history of human wars throughout time until the 21th century. The history of biological warfare is difficult to assess because of a number of confounding factors. These include the difficulty in verification of allegation, the use of the threat of this weapon for propaganda purposes, the lack of microbiological or epidemiological data, and the incidence of natural occurring endemic or epidemic diseases during hostilities. Although it may be problematic to verify at times, the use of such weapons has not been limited to national armies or militia. Frustrated civilians, terrorists and even physicians have used biological substances to promote their interests. Today, the biological threat has become more serious. It's potency, cost-effectiveness, and the ability to manufacture and deploy it with little sophistication, or under the semblance of legitimate commercial endeavors, will ensure that biological weapons remain a constant threat to human health.

  18. Working on warfare-related sites. Review after 15 years and perspectives

    Energy Technology Data Exchange (ETDEWEB)

    Schneider, U. [Umweltberatung und Planung, Kassel (Germany)

    2003-07-01

    Fifteen years ago, in 1988, in connection with the Second International TNO/BMFT-Congress for the first time sites contaminated due to armaments production were mentioned, caused by the results of the first systematic investigation of a former explosives production plant in Hessisch Lichtenau. The authors referred to another 72 large chemical armament production plants in the FRG and 39 in the GDR. At the Third International TNO/BMFT-Congress in 1990 the complex of problems were substantiated and at the same time more topics were added. The Federal Government of Germany named the following areas suspected of being warfare-related contaminated sites: former production plants, ammunition depots, defusing sites, demolition areas and firing ranges, disassembly plants and intermediate and final storage plants for conventional and chemical combat agents. Soil, water and air pollution could be caused by the following products: explosives, chemical warfare agents, incendiaries, smoke agents, propellants, additives, primary and waste products and residues from the destruction of combat agents. In 1995 the Federal Environmental Agency (UBA) presented the results of the national survey showing that there are 3240 suspected contaminated sites. In 1995 also began the soil clean-up at the warfare-related contaminated sites Stadtallendorf and Hessisch Lichtenau. 8 respectively 10 years after the beginning of the systematic investigations the first contaminated soil was removed and treated in a thermal plant. In the run-up several R and D projects funded by the Federal Government were carried out (Stadtallendorf: MOSAL = Model Remediation of Contaminated Sites, Hessisch Lichtenau: Joint project Biological Remediation of Warfare-Related Contamination). At these sites basics were worked out and technologies were put to the test which can be used for the remediation of other sites. (orig.)

  19. Percutaneous antegrade pyelography

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Chang Guhn; Lim, Bang Eun; Kim, Jae Kyu; Song, Ok Ja; Nah, Byung Sik; Chung, Hyon De [Chonnam National University College of Medicine, Kwangju (Korea, Republic of)

    1985-02-15

    Percutaneous antegrade pyelography guided by ultrasonography and fluoroscopy was attempted in 25 patients with supravesical obstructive hydronephrosis and successful in 23 patients to evaluate the site and nature of urinary obstructions. The etiology of the obstructive uropathies were urinary stricture in 11 cases, urinary Tbc. in 5 cases, urinary stone in 3 cases, uterine prolapse with cystocele, pyonephrosis, ureteral metastatic testicular carcinoma in 1 case respectively. No significant complication of the percutaneous antegrade pyelography was observed. Percutaneous antegrade pyelography provides significant diagnostic information on the obstructive lesion and can be accomplished with ease and safe in patients with obstructive hydronephrosis as a diagnostic procedure of choice in infants and children or as an alternative to a retrograde pyelography.

  20. Chemical and biological warfare: Protection, decontamination, and disposal. (Latest citations from the NTIS bibliographic database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-11-01

    The bibliography contains citations concerning the means to defend against chemical and biological agents used in military operations, and to eliminate the effects of such agents on personnel, equipment, and grounds. Protection is accomplished through protective clothing and masks, and in buildings and shelters through filtration. Elimination of effects includes decontamination and removal of the agents from clothing, equipment, buildings, grounds, and water, using chemical deactivation, incineration, and controlled disposal of material in injection wells and ocean dumping. Other Published Searches in this series cover chemical warfare detection; defoliants; general studies; biochemistry and therapy; and biology, chemistry, and toxicology associated with chemical warfare agents.(Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  1. Chemical and biological warfare: Protection, decontamination, and disposal. (Latest citations from the NTIS bibliographic database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-10-01

    The bibliography contains citations concerning the means to defend against chemical and biological agents used in military operations, and to eliminate the effects of such agents on personnel, equipment, and grounds. Protection is accomplished through protective clothing and masks, and in buildings and shelters through filtration. Elimination of effects includes decontamination and removal of the agents from clothing, equipment, buildings, grounds, and water, using chemical deactivation, incineration, and controlled disposal of material in injection wells and ocean dumping. Other Published Searches in this series cover chemical warfare detection; defoliants; general studies; biochemistry and therapy; and biology, chemistry, and toxicology associated with chemical warfare agents. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  2. Cognitive systems in electronic warfare

    Science.gov (United States)

    Kulpa, Krzysztof; Szczepankiewicz, Michał; Żywek, Marcin; Malanowski, Mateusz; Misiurewicz, Jacek; Samczyński, Piotr

    2017-04-01

    Electronic warfare (EW) techniques were invented 70 years ago and are still being developed, all the time with a key role played by their operators. However, a human operator responds far too slowly for the on-going needs since to be adequate to current threats the EW system reaction should be within 1 ms or less. Too slow reaction defers an achievement of the objectives, and generally may lead to disclosure of the applied strategy and to waste of resources. Developing the adequate response to the threat is a multifaceted matter that requires considerable experience and knowledge on the one hand, and thorough observation of outcomes of the applied strategy on the other hand. Such action requires the use of not only intelligence but also more complex algorithms for automatic control than the classical ones, and it heavily builds on the experience. It is therefore a cognitive task in its nature, and a human operator acts naturally this way. Consequently, a proper training and experience gained are what really matters. As a result of tests and actions in EW the operator builds his own knowledge base, thus, gains a capability of responding to the known threats in a balanced way. New threats, however, are much more challenging since they should be handled as fast as possible but in a fresh and creative manner. To this end, adapting the algorithms of radar jamming protection for the new conditions of the battlefield is an example of such challenging tasks. At present, such adjustments are done in a long feedback loop when the operator, after recognizing the problem, notifies the equipment manufacturers, and then, their engineers work on required solutions accordingly. Thus, the reaction time is counted in years, not a single milliseconds or seconds. Speeding up the response time is therefore the key issue, and a solution to it would be feasible only when cognitive systems were used. A concept of such cognitive system is presented in this paper.

  3. US Army Special Warfare. Its Origins: Psychological and Unconventional Warfare, 1941-1952

    Science.gov (United States)

    1982-01-01

    sug- F P _ _ 6 PSYCHOLOGICAL WARFARE IN WORLD WAR I! gestion of a single agency which would serve as a clearinghouse for all intelligence, as well as...organizations, communications, demoli- tions, organization and training of civilians for guerrilla warfare, para- chute jumping, and amphibious...General Bolte, Director, P&O, was reluctant to endorse this latter sug- gestion , indicating, "as he had indicated from time to time at other points

  4. Percutaneous dilatational tracheostomy

    DEFF Research Database (Denmark)

    Johnsen, R.

    2015-01-01

    Introduction Since the introduction and development of percutaneous dilatational tracheostomy (PDT), this procedure is accepted and incorporated in ICUs worldwide. In spite of obvious benefits for the patients, who obtain more comfort and mobility and less use of sedatives, the procedure also imp...

  5. Guiding Warfare to Reach Sustainable Peace

    DEFF Research Database (Denmark)

    Vestenskov, David; Drewes, Line

    The conference report Guiding Warfare to Reach Sustainable Peace constitutes the primary outcome of the conference It is based on excerpts from the conference presenters and workshop discussions. Furthermore, the report contains policy recommendations and key findings, with the ambition of develo...

  6. Agricultural Warfare and Bioterrorism using Invasive Species

    Science.gov (United States)

    The chapter on Agricultural Warfare and Bioterrorism using Invasive Species is part of the book titled Pest Management and Phytosanitary Trade Barriers authored by Neil Heather (Australia) and Guy Hallman. The chapter attempts to briefly put the topic into context with phytosanitation. It presents...

  7. Information Warfare Arms Control: Risks and Costs

    Science.gov (United States)

    2006-03-01

    legal system and the modern concept of arms control were able to provide for national and international collective security during the Cold War...information warfare presents many challenges that question their viability. The most significant challenges are to the international legal system , which

  8. Antiplatelet and anticoagulant therapy in elective percutaneous coronary intervention.

    Science.gov (United States)

    ten Berg, Jurriën M; Plokker, HW Thijs; Verheugt, Freek WA

    2001-01-01

    Thrombosis plays a major role in acute vessel closure both after coronary balloon angioplasty and after stenting. This review will address the role of antiplatelet and anticoagulant therapy in preventing early thrombotic complications after percutaneous coronary intervention. The focus will be on agents that are routinely available and commonly used.

  9. Antiplatelet and anticoagulant therapy in elective percutaneous coronary intervention

    Directory of Open Access Journals (Sweden)

    Verheugt Freek WA

    2001-05-01

    Full Text Available Abstract Thrombosis plays a major role in acute vessel closure both after coronary balloon angioplasty and after stenting. This review will address the role of antiplatelet and anticoagulant therapy in preventing early thrombotic complications after percutaneous coronary intervention. The focus will be on agents that are routinely available and commonly used.

  10. Surface Decontamination of Blister Agents Lewisite, Sulfur ...

    Science.gov (United States)

    Journal Article Sulfur mustard (HD) and Lewisite (L) are blister agents that have a high potential for terrorist use. Agent Yellow (HL) is the eutectic mixture of HD and L. Bench-scale testing was used to determine the residual amount of these chemical warfare agents remaining on three building materials coupons (wood, metal and glass) after application of various decontaminants (household bleach, full strength and dilute; hydrogen peroxide 3 % solution; and EasyDECON® DF200).

  11. Optimization of Graphene Sensors to Detect Biological Warfare Agents

    Science.gov (United States)

    2014-03-27

    low-cost sensors. 1.2 Research Topic Manoor showed it is possible to detect Gram-positive and Gram-negative bacteria via antimicrobial peptides ...This unit was placed into copper etchant to dissolve the copper and leave a PMMA/graphene layer for transfer to a 500nm SiO2 layer on a circuit...electron transport properties, ssDNA binding properties, and simple production. The CVD copper growth method was used to grow the graphene for transfer

  12. Biodegradation of Organophosphate Chemical Warfare Agents by Activated Sludge

    Science.gov (United States)

    2012-03-01

    0.5 g H3BO3, 0.3 g ZnSO4·7H2O, 0.24 g MnCl2·4H2O, 0.14 g CuSO4 ·5H2O, 0.06 g KI, 0.06 g Na2MoO4· 2H2O , 0.06 g CoCl2·6H2O, 0.06 g NiCl2·6H2O, and 0.06 g...g CaCl2· 2H2O , 0.6675 g KH2PO4 and 20mL of a trace element solution, adapted from Hesselmann et al. (1999). The trace element solution consisted of...the following (per liter of deionized water): 5.46 g citric acid, 4.0 g hippuric acid, 0.72 g Na3NTA· 2H2O , 0.3 g Na3EDTA·4H2O, 3.0 g FeCl3·6H2O

  13. Echogeleide percutane drainage : toepassingen in het abdomen

    NARCIS (Netherlands)

    J.S. Laméris (Johan )

    1987-01-01

    textabstractDit proefschrift behandelt een aantal toepassingen van de echogeleide punctie en drainagetechniek in het abdomen, namelijk: - de percutane abcesdrainage - de percutane galblaasdrainage - de percutane galwegdrainage Abdominale abcessen zijn in de chirurgische praktijk altijd een groot pro

  14. Percutaneous vertebroplasty: technical considerations

    Institute of Scientific and Technical Information of China (English)

    Gao-jun TENG; Shi-cheng HE

    2005-01-01

    Percutaneous vertebroplasty (PVP) is a relative new interventional technique, which is widely used in treatment of vertebral collapse caused by vertebral neoplasms and osteoporotic compression fractures. The general technical considerations of PVP techniques are discussed based on authors' experience obtained over 400 patients in the past years in this article, including preparation of PMMA, instrument of PVP, guidance and puncture approaches, and technique of the procedure, etc. The conclusion is that PVP is a safe procedure if the physicians handle it properly.

  15. Complications of percutaneous vertebroplasty

    OpenAIRE

    Saracen, Agnieszka; Kotwica, Zbigniew

    2016-01-01

    Abstract Percutaneous vertebroplasty (PVP) is a minimally invasive procedure widely used for the treatment of pain due to vertebral fractures of different origins—osteoporotic, traumatic, or neoplastic. PVP is minimally invasive, but the complications are not rare; however, they are in most cases not significant clinically. The most frequent is cement leakage, which can occur onto veins, paravertebral soft tissue, into the intervertebral disk, or to the spinal canal, affecting foraminal area ...

  16. Unconventional Warfare: A Mission Metamorphosis for the 21st Century?

    Science.gov (United States)

    2000-06-01

    brigadier general and publish several more noted works on Mao and revolutionary warfare. See Samuel B. Giffith, Mao Tse-Tung on Guerrilla Warfare (New...and propagators of the faith. The bibles (in English translation) are Mao Tse-tung on Guerrilla Warfare by Brigadier General Samuel B. Griffith...Barnett, B. Hugh Tovar , and Richard H. Schultz eds., Special Operations in US Strategy (Washington, D.C.: US Government Printing Office, 1984), 2. 58

  17. Computational models of intergroup competition and warfare.

    Energy Technology Data Exchange (ETDEWEB)

    Letendre, Kenneth (University of New Mexico); Abbott, Robert G.

    2011-11-01

    This document reports on the research of Kenneth Letendre, the recipient of a Sandia Graduate Research Fellowship at the University of New Mexico. Warfare is an extreme form of intergroup competition in which individuals make extreme sacrifices for the benefit of their nation or other group to which they belong. Among animals, limited, non-lethal competition is the norm. It is not fully understood what factors lead to warfare. We studied the global variation in the frequency of civil conflict among countries of the world, and its positive association with variation in the intensity of infectious disease. We demonstrated that the burden of human infectious disease importantly predicts the frequency of civil conflict and tested a causal model for this association based on the parasite-stress theory of sociality. We also investigated the organization of social foraging by colonies of harvester ants in the genus Pogonomyrmex, using both field studies and computer models.

  18. Violence and Warfare in Precontact Melanesia

    Directory of Open Access Journals (Sweden)

    Stephen M. Younger

    2014-01-01

    Full Text Available Levels of interpersonal violence and warfare for 30 Melanesian societies at the time of contact with Europeans are estimated based on ethnographic and historical records. While violence was common in indigenous Melanesia, it was not ubiquitous and some societies experienced extended periods of internal and external peace. Interpersonal violence and warfare were correlated-when one occurred there was a high probability of finding the other. Violence was not dependent on total population. It was, however, higher for population density greater than 50 persons per square kilometer. Violence in Melanesia may have been stimulated by the large number of relatively small polities, many of which competed with one another for prestige and, in some cases, land.

  19. Mapping the Spread of Mounted Warfare

    Directory of Open Access Journals (Sweden)

    Peter Turchin

    2016-12-01

    Full Text Available Military technology is one of the most important factors affecting the evolution of complex societies. In particular, mounted warfare, the use of horse-riders in military operations, revolutionized war as it spread to different parts of Eurasia and Africa during the Ancient and Medieval eras, and to the Americas during the Early Modern period. Here we use a variety of sources to map this spread.

  20. New dimensions of the modern warfare

    Directory of Open Access Journals (Sweden)

    CĂLIN HENTEA

    2008-02-01

    Full Text Available The huge scientific and technologic progress made by mankind during the last century has had an obvious impact on the military phenomenon. It is a common place to say that the present day wars do not look like the previous ones at all. The military are not the same as the one in former days either, whatever their national insignia on various uniforms. Hence, some questions require a clear and imperative answer. How has the contemporary war been changed? How has the 21 Century military prophile evolved? Which is the trigger of all these changes? What are the new concepts of the modern warfare? To all those questions we are trying to get an answer based on our personal experience gained during a couple of NATO missions and on the respective military doctrines and policies. Why both the military and the politicians are trying to avoid the term „war" by placing instead the much more innofensive syntagm of „military operations" and what are the main characteristics of the 3rd Millenium officer? These are some of the topics of this essay. Quite new military concepts experimented by the most powefull armed forces of the world, such as Effect Based Operations Approach, Network Based Warfare, Information Operations and Psychologiocal Operations will be also examined as pillars of the modern warfare.

  1. Intelligence and Electronic Warfare Operations

    Science.gov (United States)

    2007-11-02

    states otherwise, masculine nouns and pronouns do not refer exclusively to men. FM 34-1 CHAPTER 1 I N T E L L I G E N C E A N D E L E C T R O N I...improves as HUMINT refocuses its efforts on the AO. Interrogation and document exploitation are examples of HUMINT operations. HUMINT collection may also...and CA support for rear operations. MDCI personnel and interrogators provide HUMINT to identify and help neutralize enemy agents, sympathizers, and

  2. Percutaneous vertebroplasty; Perkutane Vertebroplastie

    Energy Technology Data Exchange (ETDEWEB)

    Hierholzer, J.; Fuchs, H. [Kliniken fuer Diagnostische und Interventionelle Radiologie, Klinikum Ernst von Bergmann, Potsdam (Germany); Depriester, C. [Strahlenklinik und Poliklinik, Charite, Humboldt-Univ. Berlin (Germany); Clinique du Bois, Lille (France); Venz, S. [Strahlenklinik und Poliklinik, Charite, Humboldt-Univ. Berlin (Germany); Maier-Hauff, K. [Neurochirurgische Klinik, Bundeswehrkrankenhaus, Berlin (Germany); Schulz, R. [Unfall- und Wiederherstellungschirurgie, Klinikum Ernst von Bergmann, Potsdam (Germany); Koch, K. [Strahlentherapie, Klinikum Ernst von Bergmann, Potsdam (Germany)

    2002-03-01

    Purpose: To describe the procedure of percutaneous vertebroplasty and to present our first clinical results of patients treated for benign or malignant painful vertebral body disease. Material and Methods: We performed percutaneous vertebroplasty in 31 painful lesions of the spine. Liquid bone cement was injected into the affected vertebral body using fluoroscopic guidance through a bilateral transpedicular approach. Etiology of the bone disease was assessed by biopsy. Pain intensity was assessed before and 1 week after the procedure by standardized catalogue. Results: Percutaneous vertebroplasty was performed in 17 thoracic and in 14 lumbar spine bodies of benign (n = 23) or malignant (n = 8) disease; no clinically relevant complications occurred. All patients reported significant pain relief 1 week after the intervention. One week after treatment, patients were pain-free in 15/31 vertebral bodies, and reported mild residual pain not necessitating narcotic medication in 16/31 cases. Conclusion: In accordance with the literature, percutaneous vertebroplasty proved to be a highly effective, minimal invasive interventional procedure to treat severely painful bone lesions of benign and malignant origin. (orig.) [German] Ziel der Arbeit ist es, die Methodik der perkutanen Vertebroplastie zu beschreiben und die eigenen Ergebnisse bei Patienten mit schmerzhaften Knochenlaesionen vorzustellen. Material und Methoden: 31 schmerzhafte Wirbelkoerperlaesionen wurden durch radiologisch gestuetzte perkutane Injektion von fluessigem Knochenzement (perkutane Vertebroplastie) behandelt. In allen Faellen wurde der bilaterale transpedikulaere Zugan zum Wirbelkoerper gewaehlt. Die Genese der zugrunde liegenden Erkrankung wurde durch Knochenbiopsie gesichert, die in koaxialer Technik durch die Vertebroplastiekanuele moeglich wurde. Die Schmerzintensitaet wurde vor und eine Woche nach der Intervention standardisiert erhoben. Ergebnisse: Bei allen Patienten gelang die Intervention ohne

  3. The Cycle of Warfare - Analysis of an Analytical Model

    DEFF Research Database (Denmark)

    Jensen, Mikkel Storm

    2016-01-01

    The abstract has the title: “The Cycle of Warfare - Analysis of an Analytical Model” The Cycle of Warfare is an analytical model designed to illustrate the coherence between the organization, doctrine and technology of a military entity and the influence of the surrounding society as expressed...

  4. Dirty Fighting: How to Counter Total Warfare Mentality

    Science.gov (United States)

    2015-06-12

    DIRTY FIGHTING: HOW TO COUNTER TOTAL WARFARE MENTALITY A thesis presented to the Faculty of the U.S. Army Command and...to Counter Total Warfare Mentality Approved by: , Thesis Committee Chair LTC Sandra J. Sanchez, MBA , Member Marlyn R. Pierce...

  5. Organizing for Irregular Warfare: Implications for the Brigade Combat Team

    Science.gov (United States)

    2007-12-01

    Glenn, Russell, John Gordon, Tom Herbert, John Matsumura, Randall Steeb, and Paul Steinberg. Lightning Over Water: Sharpening America’s Light...conventional and unconventional warfare.” Special Warfare Journal, March-April (2007). Hersey , John. A Bell for Adano. New York: Vintage Books

  6. Built to Outlast: Operational Approaches to Hybrid Warfare

    Science.gov (United States)

    2012-05-17

    second evolutionary generation of warfare incorporating political, economic, social, and technical changes, and maneuver warfare. Much of this concept is...aligns itself with the emerging understanding of the world through nonlinear sciences, epistemological and ontological foundations.308 In this, Unified

  7. Nodes and Codes: The Reality of Cyber Warfare

    Science.gov (United States)

    2012-05-17

    Options ‘Off the Table’ for US Response to Cyber Attacks,” Stars and Stripes, May 8, 2009. 34 Scott Shackelford , “From Nuclear War to Net War...whitepapers/warfare/redefining-role- information-warfare-chinese-strategy_896 (accessed February 18, 2012). Shackelford , Scott. “From Nuclear War to

  8. Combat Simulation Modeling in Naval Special Warfare Mission Planning.

    Science.gov (United States)

    1995-12-01

    This thesis explores the potential role of combat simulation modeling in the Naval Special Warfare mission planning cycle. It discusses methods for...at the tactical level. The thesis concludes by discussing additional applications of combat simulation modeling within the Naval Special Warfare community and makes recommendations for its effective and efficient implementation.

  9. [Ultrasound guided percutaneous nephrolithotripsy].

    Science.gov (United States)

    Guliev, B G

    2014-01-01

    The study was aimed to the evaluation of the effectiveness and results of ultrasound guided percutaneous nephrolithotripsy (PNL) for the treatment of patients with large stones in renal pelvis. The results of PNL in 138 patients who underwent surgery for kidney stones from 2011 to 2013 were analyzed. Seventy patients (Group 1) underwent surgery with combined ultrasound and radiological guidance, and 68 patients (Group 2)--only with ultrasound guidance. The study included patients with large renal pelvic stones larger than 2.2 cm, requiring the formation of a single laparoscopic approach. Using the comparative analysis, the timing of surgery, the number of intra- and postoperative complications, blood loss and length of stay were evaluated. Percutaneous access was successfully performed in all patients. Postoperative complications (exacerbation of chronic pyelonephritis, gross hematuria) were observed in 14.3% of patients in Group 1 and in 14.7% of patients in Group 2. Bleeding requiring blood transfusion, and injuries of adjacent organs were not registered. Efficacy of PNL in the Group 1 was 95.7%; 3 (4.3%) patients required additional interventions. In Group 2, the effectiveness of PNL was 94.1%, 4 (5.9%) patients additionally underwent extracorporeal lithotripsy. There were no significant differences in the effectiveness of PNL, the volume of blood loss and duration of hospitalization. Ultrasound guided PNL can be performed in large pelvic stones and sufficient expansion of renal cavities, thus reducing radiation exposure of patients and medical staff.

  10. Hybrid Warfare: Preparing for Future Conflict

    Science.gov (United States)

    2015-02-17

    Fukuyama , Francis . “At the ‘End of History’ Still Stands Democracy.” The Wall Street Journal, 6 June 2014. http://www.wsj.com/articles/at-the-end-of...warfare is cultural instead of political (in the traditional Clausewitzian sense). 15 Hoffman is referring to Francis Fukuyama’s idea of “the end of...history,” as argued in his 1989 essay and subsequent book. Fukuyama first published an essay titled “The End of History” in the National Interest in

  11. Microwave receivers with electronic warfare applications

    CERN Document Server

    Tsui, James

    2005-01-01

    This book by the author of Digital Techniques for Wideband Receivers willbe like no other one on your book shelf as the definitive word on electronicwarfare (EW) receiver design and performance. Whether you are an EWscientist involved in the test and evaluation of EW receivers or a designerof RWR's and other EW-related receivers, Microwave Receivers withElectronic Warfare Applications is a handy reference through which you canperfect your technical art. Lucidly written, this book is a treatise on EWreceivers that is relevant to you if you are just looking for a top-levelinsight into EW receive

  12. Electronic warfare receivers and receiving systems

    CERN Document Server

    Poisel, Richard A

    2014-01-01

    Receivers systems are considered the core of electronic warfare (EW) intercept systems. Without them, the fundamental purpose of such systems is null and void. This book considers the major elements that make up receiver systems and the receivers that go in them.This resource provides system design engineers with techniques for design and development of EW receivers for modern modulations (spread spectrum) in addition to receivers for older, common modulation formats. Each major module in these receivers is considered in detail. Design information is included as well as performance tradeoffs o

  13. Axial Vircator for Electronic Warfare Applications

    Directory of Open Access Journals (Sweden)

    L. Drazan

    2009-12-01

    Full Text Available This paper deals with a high power microwave generator with virtual cathode – vircator in axial release for electronic warfare applications. The classification of directed energy weapons microwave (DEWM is introduced together with basic block diagrams of a particular class of DEWM. In the paper, methods for designing vircator pulsed power supply, axial vircator structure, measurement methods and experimental results are presented. The vircator in electromagnetic ammunition is powered by magneto-cumulative generator and in weapons for defense of objects (WDO, it is powered by Marx generator. The possible applications of a vircator in the DEWM area are discussed.

  14. Droplet Reaction and Evaporation of Agents Model (DREAM). Glass model results; Sand model plans

    NARCIS (Netherlands)

    Hin, A.R.T.

    2006-01-01

    The Agent Fate Program is generating an extensive set of quality agent fate data which is being used to develop highly accurate secondary evaporation predictive models. Models are being developed that cover a wide range of traditional chemical warfare agents deposited onto surfaces routinely found o

  15. Development of a Model for Nerve Agent Inhalation in Conscious Rats

    Science.gov (United States)

    2013-05-23

    Toxicol Mech Meth 14:183–94. Bajgar J. (2004). Organophosphates /nerve agent poisoning : mechanism of action, diagnosis, prophylaxis, and treatment. Adv...See reprint. 15. SUBJECT TERMS Chemical warfare, cholinesterases, inhalation exposure, nerve agents, organophosphates , vapor 16. SECURITY...exposure system for assessing respiratory toxicity of vaporized chemical agents in untreated, non-anesthetized rats. The organophosphate diisopropyl

  16. Percutaneous Nephrolithotomy in Children

    Directory of Open Access Journals (Sweden)

    Romano T. DeMarco

    2011-01-01

    Full Text Available The surgical management of pediatric stone disease has evolved significantly over the last three decades. Prior to the introduction of shockwave lithotripsy (SWL in the 1980s, open lithotomy was the lone therapy for children with upper tract calculi. Since then, SWL has been the procedure of choice in most pediatric centers for children with large renal calculi. While other therapies such as percutaneous nephrolithotomy (PNL were also being advanced around the same time, PNL was generally seen as a suitable therapy in adults because of the concerns for damage in the developing kidney. However, recent advances in endoscopic instrumentation and renal access techniques have led to an increase in its use in the pediatric population, particularly in those children with large upper tract stones. This paper is a review of the literature focusing on the indications, techniques, results, and complications of PNL in children with renal calculi.

  17. Advances in percutaneous stone surgery

    Directory of Open Access Journals (Sweden)

    Christopher Hartman

    2015-01-01

    Full Text Available Treatment of large renal stones has changed considerably in recent years. The increasing prevalence of nephrolithiasis has mandated that urologists perform more surgeries for large renal calculi than before, and this has been met with improvements in percutaneous stone surgery. In this review paper, we examine recent developments in percutaneous stone surgery, including advances in diagnosis and preoperative planning, renal access, patient position, tract dilation, nephroscopes, lithotripsy, exit strategies, and post-operative antibiotic prophylaxis.

  18. Prevalence of Asthma in Children of Chemical Warfare Victims

    Science.gov (United States)

    Mirsadraee, Majid; Mozaffari, Abolfazl; Attaran, Davood

    2011-01-01

    Objective Exposure of DNA to sulfur mustard gas may increase the inheritance of asthma in chemical warfare victims' (CWV) offspring. The objective of this study was to determine the prevalence of asthma in children of CWV and compare it to asthmatic children in the general population. Methods Four hundred and nine children from 130 CWV fathers and 440 children from 145 asthmatic parents from two cities in Iran participated in this study. The prevalence of asthma was determined by standard questionnaire released for epidemiological survey of asthma in children and compared between two groups. Findings The prevalence of asthma in the CWV group was 15%; this was not significantly different from the control group (12.5%). The children of the CWV group reported a significantly greater incidence of wheezing (1.2±3.1 attacks) per year, but the control group reported more severe attacks leading to speech difficulties (3%) and coughing (7%). Regression analysis showed that with increasing family size in the control group, the number of subjects suffering from asthmatic symptoms decreases significantly (r=0.86, P=0.001). Conclusion Chemical agents may increase the prevalence of asthma in the offspring of CWV. PMID:23056804

  19. Chemical and biological warfare: Biochemistry, therapy, and treatment. (Latest citations from the NTIS bibliographic database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-12-01

    The bibliography contains citations concerning biochemistry, therapy, and treatment of the effects of military chemical and biological warfare agents. References include surveys and studies of immunizing agents and drugs, the efficacy of these drugs, and the effect of the drugs on the patient. Also included are biochemical studies, assay techniques, and antidote development, some of which is supported by animal studies. Citations concerning detection and warning, defoliants, protection, biology and toxicology, and general studies are covered in separate bibliographies.(Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  20. Chemical and biological warfare: Biochemistry, therapy, and treatment. (Latest citations from the NTIS bibliographic database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-11-01

    The bibliography contains citations concerning biochemistry, therapy, and treatment of the effects of military chemical and biological warfare agents. References include surveys and studies of immunizing agents and drugs, the efficacy of these drugs, and the effect of the drugs on the patient. Also included are biochemical studies, assay techniques, and antidote development, some of which is supported by animal studies. Citations concerning detection and warning, defoliants, protection, biology and toxicology, and general studies are covered in separate bibliographies.(Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  1. Percutaneous umbilical cord blood sampling - slideshow

    Science.gov (United States)

    ... page: //medlineplus.gov/ency/presentations/100196.htm Percutaneous umbilical cord blood sampling - series—Normal anatomy To use the ... or blood disorder, your doctor may recommend percutaneous umbilical cord blood sampling (PUBS), which is performed at 18 ...

  2. Helicopters in Irregular Warfare: Algeria, Vietnam, and Afghanistan

    Science.gov (United States)

    2013-06-13

    the political group associated with the Algerian nationalist independence movement GALAT Groupement d’ Aviation Légère de l’Armée de Terre ...unique from most conflicts because the expeditionary forces’ parent country rarely perceives an existential threat.19 The lack of perceived threat...dominance rarely guarantees success in irregular warfare.22 Instead, success in irregular warfare requires synergy between government and military efforts

  3. Littoral Combat Ship Open Ocean Anti-Submarine Warfare

    Science.gov (United States)

    2014-06-01

    COVERED Capstone 4. TITLE AND SUBTITLE LITTORAL COMBAT SHIP OPEN OCEAN ANTI-SUBMARINE WARFARE 5. FUNDING NUMBERS 6. AUTHOR(S) 311-124O/Team LCS...Life cycle cost LCCE Life cycle cost estimate LCS Littoral combat ship LHA Landing ship, helicopter assault LHD Landing ship, helicopter...is unlimited LITTORAL COMBAT SHIP OPEN OCEAN ANTI- SUBMARINE WARFARE by Team LCS 311-124O June 2014 Capstone Advisors: John Green Dan

  4. Fourth Generation Warfare and Its Impact on the Army

    Science.gov (United States)

    2007-11-02

    In 1989, the authors of an article entitled, "The Changing Face of War: Into the Fourth Generation ," offered a glimpse of the future rooted in the...decline of the West in a world rife with cultural conflicts and the powerful influences of a form of cultural Marxism known as political correctness...were combining in America to create conditions for a new generation of warfare. Their vision included a form of warfare that bypassed the military

  5. The Chinese People’s Liberation Army and Information Warfare

    Science.gov (United States)

    2014-03-01

    information confrontation operations across the elec- tromagnetic spectrum. In doing so, as Dr. Wortzel’s monograph explains, the PLA used innovative means...and in- formation confrontation operations across the electro- magnetic spectrum. As this monograph explains, the PLA used innovative means to...information warfare concepts as a barometer of how the PLA approached the concept, by 2007 the threads of integrated network electronic warfare

  6. Depth vs. breadth: talent management for special warfare

    OpenAIRE

    Krebs, William K.

    2016-01-01

    Approved for public release; distribution is unlimited This thesis presents recommendations for improving officer talent management for Special Warfare units. Success in this complex human domain demands that key planners and commanders of a Special Warfare campaign operate with a long-term perspective, a depth of expertise, and a strong network of relationships. However, on any given day in a U.S. Army Special Forces Group, the preponderance of field grade officers are in their first year...

  7. Naval Special Warfare Injury Prevention and Human Performance Initiative

    Science.gov (United States)

    2012-06-30

    3. DATES COVERED (From - To) 01 JUL 10-30 JUN 12 4. TITLE AND SUBTITLE Naval Special Warfare Group 4 Injury Prevention and Human Performance...from suboptimal biomechanical, musculoskeletal, and physiological characteristics and is further compounded with poor or inadequate nutrition . The...Prescribed by ANSI Std. Z39.18 OFFICE OF NAVAL RESEARCH FINAL TECHNICAL REPORT Naval Special Warfare Injury Prevention and Human Performance

  8. Percutaneous transbiliary biopsy.

    Science.gov (United States)

    Andrade, Gustavo Vieira; Santos, Miguel Arcanjo; Meira, Marconi Roberto; Meira, Mateus Duarte

    2017-01-01

    Percutaneous drainage of the bile ducts is an established procedure for malignant obstructions, in which a histological diagnosis is often not obtained. We describe the biopsy technique of obstructive lesions through biliary drainage access, using a 7F endoscopic biopsy forceps, widely available; some are even reusable. This technique applies to lesions of the hepatic ducts, of the common hepatic duct and of all extension of the common bile duct. RESUMO A drenagem percutânea das vias biliares é um procedimento estabelecido para obstruções malignas, nos quais, muitas vezes, não se consegue um diagnóstico histológico. Descrevemos a técnica de biópsia da lesão obstrutiva através do acesso de drenagem biliar, utilizando um fórcipe de biópsia endoscópica 7F, amplamente disponível e alguns reutilizáveis. Esta técnica aplica-se a lesões dos ductos hepáticos, do hepático comum e de toda extensão do colédoco.

  9. COMPLICATIONS OF PERCUTANEOUS NEPHROLITHOTOMY

    Directory of Open Access Journals (Sweden)

    Ottra

    2016-03-01

    Full Text Available BACKGROUND The increasing global prevalence of nephrolithiasis continues to burden the health care delivery systems of developing nations. Percutaneous Nephrolithotomy (PCNL is considered the standard treatment for many types of calculi. This study focuses on the complications of PCNL in private practice setting at a peripheral center using the modified Clavien system and role of Guy’s stone score as a predictor of stone free rate and complications. METHODS This is a prospective cohort study of 480 patients who underwent PCNL during August 2011 to July 2015. The complications were classified according to modified Clavien system and correlated with the stone complexity as per the Guy’s stone score. RESULTS It was found that overall 120 complications were reported in 480 patients with the incidence of complications of Grade I, II, IIIa, IIIb, IVb being 48 (10%, 38 (7.9%, 15 (3.5%, 12 (2.5% and 4 (0.8% respectively. As per the Guy’s stone score there were 336, 104 and 40 cases belonging to GSS I, II and III respectively. All grades of complications were more common in GSS II and III. The stone clearance was found to be complete in 95%, 82% and 75% of GSS I, II, III respectively. CONCLUSION The stone complexity is related to complication rate and GSS helps to predict stone free rate and complications

  10. Percutaneous renal tumour biopsy.

    Science.gov (United States)

    Delahunt, Brett; Samaratunga, Hemamali; Martignoni, Guido; Srigley, John R; Evans, Andrew J; Brunelli, Matteo

    2014-09-01

    The use of percutaneous renal tumour biopsy (RTB) as a diagnostic tool for the histological characterization of renal masses has increased dramatically within the last 30 years. This increased utilization has paralleled advances in imaging techniques and an evolving knowledge of the clinical value of nephron sparing surgery. Improved biopsy techniques using image guidance, coupled with the use of smaller gauge needles has led to a decrease in complication rates. Reports from series containing a large number of cases have shown the non-diagnostic rate of RTB to range from 4% to 21%. Re-biopsy has been shown to reduce this rate, while the use of molecular markers further improves diagnostic sensitivity. In parallel with refinements of the biopsy procedure, there has been a rapid expansion in our understanding of the complexity of renal cell neoplasia. The 2013 Vancouver Classification is the current classification for renal tumours, and contains five additional entities recognized as novel forms of renal malignancy. The diagnosis of tumour morphotype on RTB is usually achievable on routine histology; however, immunohistochemical studies may be of assistance in difficult cases. The morphology of the main tumour subtypes, based upon the Vancouver Classification, is described and differentiating features are discussed.

  11. Median lethal dose determination for percutaneous exposure to soman and VX in guinea pigs and the effectiveness of decontamination with M291 SDK or SANDIA foam.

    Science.gov (United States)

    Clarkson, Edward D; Schulz, Susan M; Railer, Roy F; Smith, Kelly H

    2012-08-03

    Soman (GD) and VX are chemical warfare agents that can be absorbed through the skin. We determined the median lethal dose (MLD) for the cutaneous application of GD and VX in anesthetized haired guinea pigs and then tested the ability of a currently fielded decontamination kit, the M291 Skin Decontamination Kit (SDK), and decontaminating foam made by SANDIA Labs to decontaminate areas that have been exposed to cutaneous applications of GD and VX. The fur of guinea pigs was clipped on the left flank 24h prior to exposure. Animals were anesthetized and 5 min later neat GD or neat VX was applied. The MLD for percutaneous exposure to GD was 11.6 mg/kg, and to VX it was 0.10mg/kg. To test the ability of the M291 SDK, either GD or VX was applied and removed 1 min later with the pads of the M291 SDK clasped in a pair of forceps and wiped across the flank of the animal. The MLDs for GD and VX removed with the M291 SDK pads were 76.9 mg/kg and 0.87 mg/kg, respectively. When neat GD or neat VX was applied and removed 1 min later in the same manner with gauze soaked in SANDIA foam (MDF-100), the MLDs were 412 mg/kg and 10.4 mg/kg respectively. These data demonstrate that GD and VX are significantly less potent when applied cutaneously than previously reported for subcutaneous injections and indicate that improvement is needed on the limited protective ratio provided by the M291 SDK.

  12. Alternative Treatment for Bleeding Peristomal Varices: Percutaneous Parastomal Embolization

    Energy Technology Data Exchange (ETDEWEB)

    Pabon-Ramos, Waleska M., E-mail: waly.pr@duke.edu [Duke University Hospital, Department of Radiology (United States); Niemeyer, Matthew M. [Washington University Medical Center, Mallinckrodt Institute of Radiology (United States); Dasika, Narasimham L., E-mail: narasimh@med.umich.edu [University of Michigan Health System, Department of Radiology (United States)

    2013-10-15

    Purpose: To describe how peristomal varices can be successfully embolized via a percutaneous parastomal approach. Methods: The medical records of patients who underwent this procedure between December 1, 2000, and May 31, 2008, were retrospectively reviewed. Procedural details were recorded. Median fluoroscopy time and bleeding-free interval were calculated. Results: Seven patients underwent eight parastomal embolizations. The technical success rate was 88 % (one failure). All embolizations were performed with coils combined with a sclerosant, another embolizing agent, or both. Of the seven successful parastomal embolizations, there were three cases of recurrent bleeding; the median time to rebleeding was 45 days (range 26-313 days). The remaining four patients did not develop recurrent bleeding during the follow-up period; their median bleeding-free interval was 131 days (range 40-659 days). Conclusion: This case review demonstrated that percutaneous parastomal embolization is a feasible technique to treat bleeding peristomal varices.

  13. The World War Two Allied Economic Warfare: The Case of Turkish Chrome Sales

    OpenAIRE

    ÖNSOY, Murat

    2009-01-01

    Economic character of "modern warfare" is too important to be underestimated. In the Economic Warfare belligerents attempt to reduce the war capacity of the enemy through various methods. In World War II crushing down the German war production and economy was the main target of the British Ministry of Economic Warfare. For Germany, one of the many ways of overcoming the British Economic Warfare was to trade with the neutral countries that had land connection to the Third Reich. Turkey was one...

  14. Post-exposure therapy with recombinant human BuChE following percutaneous VX challenge in guinea-pigs

    OpenAIRE

    Mumford, Helen; Troyer, John K.

    2011-01-01

    Poisoning by nerve agents via the percutaneous (p.c.) route is an issue because the slow absorption of agent could result in poisoning which outlasts the protection provided by conventional pharmacological therapy. The bioscavenger approach is based on the concept of binding nerve agent in the bloodstream, thus preventing nerve agent from reaching the target tissues and inhibiting acetylcholinesterase activity. One bioscavenger that has been extensively studied is human butyrylcholinesterase ...

  15. Percutaneous drainage of abdominal abcess

    Energy Technology Data Exchange (ETDEWEB)

    Men, Sueleyman E-mail: suleyman.men@deu.edu.tr; Akhan, Okan; Koeroglu, Mert

    2002-09-01

    The mortality in undrained abdominal abscesses is high with a mortality rate ranging between 45 and 100%. The outcome in abdominal abscesses, however, has improved due to advances in image guided percutaneous interventional techniques. The main indications for the catheter drainage include treatment or palliation of sepsis associated with an infected fluid collection, and alleviation of the symptoms that may be caused by fluid collections by virtue of their size, like pancreatic pseudocele or lymphocele. The single liver abscesses may be drained with ultrasound guidance only, whereas the multiple abscesses usually require computed tomography (CT) guidance and placement of multiple catheters. The pancreatic abscesses are generally drained routinely and urgently. Non-infected pancreatic pseudocysts may be simply observed unless they are symptomatic or cause problems such as pain or obstruction of the biliary or the gastrointestinal tract. Percutaneous routes that have been described to drain pelvic abscesses include transrectal or transvaginal approach with sonographic guidance, a transgluteal, paracoccygeal-infragluteal, or perineal approach through the greater sciatic foramen with CT guidance. Both the renal and the perirenal abscesses are amenable to percutaneous drainage. Percutaneous drainage provides an effective and safe alternative to more invasive surgical drainage in most patients with psoas abscesses as well.

  16. Nephrostomy in percutaneous nephrolithotomy (PCNL)

    DEFF Research Database (Denmark)

    Cormio, Luigi; Preminger, Glenn; Saussine, Christian

    2013-01-01

    PURPOSE: To explore the relationships between nephrostomy tube (NT) size and outcome of percutaneous nephrolithotomy (PCNL). METHODS: The Clinical Research Office of the Endourological Society (CROES) prospectively collected data from consecutive patients treated with PCNL over a 1-year period at...

  17. Image guided percutaneous splenic interventions

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Mandeep [Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh 160012 (India)], E-mail: mandykang2005@yahoo.com; Kalra, Naveen; Gulati, Madhu; Lal, Anupam; Kochhar, Rohit [Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh 160012 (India); Rajwanshi, Arvind [Department of Cytology, Postgraduate Institute of Medical Education and Research, Chandigarh 160012 (India)

    2007-10-15

    Aim: The objective of this study is to evaluate the efficacy and safety of image-guided percutaneous splenic interventions as diagnostic or therapeutic procedures. Materials and methods: We performed a retrospective review of our interventional records from July 2001 to June 2006. Ninety-five image-guided percutaneous splenic interventions were performed after informed consent in 89 patients: 64 men and 25 women who ranged in age from 5 months to 71 years (mean, 38.4 years) under ultrasound (n = 93) or CT (n = 2) guidance. The procedures performed were fine needle aspiration biopsy of focal splenic lesions (n = 78) and aspiration (n = 10) or percutaneous catheter drainage of a splenic abscess (n = 7). Results: Splenic fine needle aspiration biopsy was successful in 62 (83.78%) of 74 patients with benign lesions diagnosed in 43 (58.1%) and malignancy in 19 (25.67%) patients. The most common pathologies included tuberculosis (26 patients, 35.13%) and lymphoma (14 patients, 18.91%). Therapeutic aspiration or pigtail catheter drainage was successful in all (100%) patients. There were no major complications. Conclusions: Image-guided splenic fine needle aspiration biopsy is a safe and accurate technique that can provide a definitive diagnosis in most patients with focal lesions in the spleen. This study also suggests that image-guided percutaneous aspiration or catheter drainage of splenic abscesses is a safe and effective alternative to surgery.

  18. Complications of percutaneous vertebroplasty

    Science.gov (United States)

    Saracen, Agnieszka; Kotwica, Zbigniew

    2016-01-01

    Abstract Percutaneous vertebroplasty (PVP) is a minimally invasive procedure widely used for the treatment of pain due to vertebral fractures of different origins—osteoporotic, traumatic, or neoplastic. PVP is minimally invasive, but the complications are not rare; however, they are in most cases not significant clinically. The most frequent is cement leakage, which can occur onto veins, paravertebral soft tissue, into the intervertebral disk, or to the spinal canal, affecting foraminal area or epidural space. We analyzed results of treatment and complications of vertebroplasty performed with the use of polimethylomethylacrylate cement (PMMA) on 1100 vertebrae, with a special regard to the severity of complication and eventual clinical manifestation. One thousand one hundred PVP were analyzed, performed in 616 patients. There were 468 (76%) women and 148 men (24%), 24 to 94-year old, mean age 68 years. From 1100 procedures, 794 treated osteporotic and 137 fractures due to malignant disease, 69 PVP were made in traumatic fractures. One hundred patients had painful vertebral hemangiomas. Seven hundred twenty-six (66%) lesions were in thoracic, and 374 (34%) in lumbar area. Results of treatment were assessed using 10 cm Visual Analogue Scale (VAS) 12 hours after surgery, 7 days, 30 days, and then each 6 months, up to 3 years. Before surgery all patients had significant pain 7 to 10 in VAS scale, mean 8.9 cm. Twelve  hours after surgery 602 (97.7%) reported significant relief of pain, with mean VAS of 2,3 cm. Local complications occurred in 50% of osteoporotic, 34% of neoplastic, 16% of traumatic fractures, and 2% of vertebral hemangiomas. The most common was PMMA leakage into surrounding tissues—20%; paravertebral vein embolism—13%; intradiscal leakage—8%; and PMMA leakage into the spinal canal—0.8%. Results of treatment did not differ between patients with and without any complications. From 104 patients who had chest X-ray or CT study performed

  19. Electronic Warfare Closed Loop Laboratory (EWCLL) Antenna Motor Software and Hardware Development

    Science.gov (United States)

    2016-09-01

    ARL-TN-0779 ● SEP 2016 US Army Research Laboratory Electronic Warfare Closed Loop Laboratory (EWCLL) Antenna Motor Software and...Electronic Warfare Closed Loop Laboratory (EWCLL) Antenna Motor Software and Hardware Development by Neal Tesny Sensors and Electron Devices Directorate...TITLE AND SUBTITLE Electronic Warfare Closed Loop Laboratory (EWCLL) Antenna Motor Software and Hardware Development 5a. CONTRACT NUMBER 5b

  20. Capillary gas chromatographic analysis of nerve agents using large volume injections

    NARCIS (Netherlands)

    Degenhardt, C.E.A.M.; Kientz, C.E.

    1996-01-01

    The use of large volume injections has been studied for the verification of intact organophosphorus chemical warfare agents in water samples. As the use of ethyl acetate caused severe detection problems new potential solvents were evaluated. With the developed procedure, the nerve agents sarin, tabu

  1. APSTNG: neutron interrogation for detection of explosives, drugs, and nuclear and chemical warfare materials

    Science.gov (United States)

    Rhodes, Edgar A.; Peters, Charles W.

    1993-02-01

    A recently developed neutron diagnostic probe system has the potential to satisfy a significant number of van-mobile and fixed-portal requirements for nondestructive detection, including monitoring of contraband explosives, drugs, and weapon materials, and treaty verification of sealed munitions. The probe is based on a unique associated-particle sealed-tube neutron generator (APSTNG) that interrogates the object of interest with a low-intensity beam of 14- MeV neutrons generated from the deuterium-tritium reaction and that detects the alpha-particle associated with each neutron. Gamma-ray spectra of resulting neutron reactions identify nuclides associated with all major chemicals in explosives, drugs, and chemical warfare agents, as well as many pollutants and fissile and fertile special nuclear material. Flight times determined from detection times of the gamma-rays and alpha-particles yield a separate coarse tomographic image of each identified nuclide. The APSTNG also forms the basis for a compact fast-neutron transmission imaging system that can be used along with or instead of the emission imaging system. Proof-of-concept experiments have been performed under laboratory conditions for simulated nuclear and chemical warfare munitions and for explosives and drugs. The small and relatively inexpensive APSTNG exhibits high reliability and can be quickly replaced. Surveillance systems based on APSTNG technology can avoid the large physical size, high capital and operating expenses, and reliability problems associated with complex accelerators.

  2. Numerical simulation of RCS for carrier electronic warfare airplanes

    Directory of Open Access Journals (Sweden)

    Yue Kuizhi

    2015-04-01

    Full Text Available This paper studies the radar cross section (RCS of carrier electronic warfare airplanes. Under the typical naval operations section, the mathematical model of the radar wave’s pitch angle incidence range analysis is established. Based on the CATIA software, considering dynamic deflections of duck wing leading edge flaps, flaperons, horizontal tail, and rudder, as well as aircraft with air-to-air missile, anti-radiation missile, electronic jamming pod, and other weapons, the 3D models of carrier electronic warfare airplanes Model A and Model B with weapons were established. Based on the physical optics method and the equivalent electromagnetic flow method, by the use of the RCSAnsys software, the characteristics of carrier electronic warfare airplanes’ RCS under steady and dynamic flights were simulated under the UHF, X, and S radar bands. This paper researches the detection probability of aircraft by radars under the condition of electronic warfare, and completes the mathematical statistical analysis of the simulation results. The results show that: The Model A of carrier electronic warfare airplane is better than Model B on stealth performance and on discover probability by radar detection effectively.

  3. 经皮注射淋巴结超声造影在乳腺癌患者前哨淋巴结中的诊断价值%The daignostic value of contrast-enhanced ultras ound with percutaneous injection of contrast agents for the sentinel lymph nodes in breast cancer patients

    Institute of Scientific and Technical Information of China (English)

    王泽爱; 樊云清; 王兴田

    2016-01-01

    Objective To compare the diagnostic values of conventional ultrasound and contrast -enhanced ultra-sound with percutaneous injection of contrast agents in the lymph nodes for the sentinel lymph nodes in breast cancer pa -tients.Methods A total of79 breast cancer patients who were admitted into our hospital from February 2013 to April 2015were enrolled into the current study .They were percutaneously injected with lyophilized powders for ultrasound ex -amination of the sentinel lymph nodes ,with methylene blue as a contrast agent .Meanwhile , they were subjected to con-ventional ultrasound .Results Among 42 patients performing contrast -enhanced ultrasound were 29 patients with the sentinel lymph nodes ( 38 lymph nodes ) , including 19 sentinel lymph nodes ( where 15 nodes were pathological diag-nosed), and 19 non-metastatic lymph nodes (where 17 nodes were pathological diagnosed ), achieving 83.3%sensitiv-ity, 92.3%specificity and 93.1% accuracy.Meanwhile, 21 lymph nodes were found in 37 patients after conventional ultrasound , including 13 sentinel lymph nodes ( where 10 nodes were pathological diagnosed ) , and 8 non-metastatic lymph nodes(where 6 nodes were pathological diagnosed ), achieving 37.5%sensitivity, 42.9%specificity and 53.8%accuracy.Compared with conventional ultrasound , contrast-enhanced ultrasound could produce significant improvement in sensitivity, specificity and accuracy for diagnosis of the sentinel lymph nodes in breast cancer patients ( P<0.05 ). Conclusion Contrast-enhanced ultrasound with percutaneous injection of contrast agents in the lymph nodes can well determine the sentinel lymph nodes in breast cancer patients , with superior clinical values to conventional ultrasound .%目的:探讨经皮注射淋巴结超声造影与常规超声对乳腺癌前哨淋巴结显像及转移的诊断价值。方法对79例乳腺癌患者进行研究,以手术过程中的亚甲蓝染色作为对比,应用经皮注射冻干粉剂对这些患者

  4. Concepto y fuentes para el estudio de la Information Warfare

    OpenAIRE

    Tramullas Saz, Jesús

    1998-01-01

    En este trabajo se aborda el concepto de Información Warfare, así como las principales definiciones que se han propuesto para el mismo. Se establecen los diferentes tipos de acciones que se inscriben en este ámbito, y se delinean algunas implicaciones para el especialista en información. Como punto de partida para su estudio, se incluyen una selección de fuentes de información sobre el tema objeto de estudio. ABSTRACT: This paper broaches the concept of Information Warfare, as ...

  5. Percutaneous nephrolithotomy in early pregnancy.

    Science.gov (United States)

    Shah, A; Chandak, P; Tiptaft, R; Glass, J; Dasgupta, P

    2004-08-01

    Most cases of urolithiasis in pregnancy are managed conservatively either with ureteric stents or percutaneous nephrostomy tubes, which need to be changed at regular intervals. Definitive management of the stone is usually delayed till after delivery. We describe a patient who presented with pyonephrosis in the fifth week of gestation, due to a stone obstructing the right ureteropelvic junction. This was managed by insertion of a nephrostomy tube. She declined nephrostomy tube/stent changes during the rest of her pregnancy and requested termination as an alternative. She successfully underwent percutaneous nephrolithotomy in the 14th week of pregnancy, with radiation exposure strictly localised to the kidney for 6 s. A healthy male baby was delivered at term.

  6. Possible Long Term Effects of Chemical Warfare Using Visual Evoked Potentials

    Directory of Open Access Journals (Sweden)

    Abbas Riazi

    2014-09-01

    Full Text Available Some studies have already addressed the effects of occupational organic solvent exposure on the visually evoked potentials (VEPs. Visual system is an important target for Sulphur Mustard (SM toxicity. A number of Iranian victims of Sulphur Mustard (SM agent were apprehensive about the delay effect of SM on their vision and a possible delay effect of SM on their visual cortex. This investigation was performed on 34 individuals with a history of chemical exposure and a control group of 15 normal people. The Toennies electro-diagnosis device was used and its signals were saved as the latencies. The mean of N75, N140 and P100 of victims of chemical warfare (VCWs and control group indicated no significant results (P>0.05. The VCWs did not show any visual symptoms and there was no clear deficit in their VEPs.

  7. The art of antibacterial warfare: Deception through interference with quorum sensing-mediated communication.

    Science.gov (United States)

    Rampioni, Giordano; Leoni, Livia; Williams, Paul

    2014-08-01

    Almost a century on from the discovery of penicillin, the war against bacterial infection still rages compounded by the emergence of strains resistant to virtually every clinically approved antibiotic and the dearth of new antibacterial agents entering the clinic. Consequently there is renewed interest in drugs which attenuate virulence rather than bacterial growth. Since the metaphors of warfare are often used to describe the battle between pathogen and host, we will describe in such a context, the molecular communication (quorum sensing) mechanisms used by bacteria to co-ordinate virulence at the population level. Recent progress in exploiting this information through the design of anti-virulence deception strategies that disrupt quorum sensing through signal molecule inactivation, inhibition of signal molecule biosynthesis or the blockade of signal transduction and their advantages and disadvantages are considered.

  8. Morbidity after percutaneous liver biopsy.

    OpenAIRE

    Lichtman, S; Guzman, C; Moore, D.; Weber, J L; Roberts, E.A.

    1987-01-01

    The safety of percutaneous liver biopsy with a 1.2 mm Menghini needle in infants aged one year or less was investigated. One hundred and eighty four procedures performed from 1975 to 1985 were reviewed. There were no deaths or major complications within 48 hours associated with the procedure. In five instances specific complications occurred: a drop in haemoglobin concentration (three), transient hypotension (one), and haematoma at the biopsy site (one). The result of liver biopsy was diagnos...

  9. An update on percutaneous nephrolithotomy

    DEFF Research Database (Denmark)

    Tefekli, A; Cordeiro, E; de la Rosette, J J M C H

    2013-01-01

    Since its introduction in late 1970's, percutaneous nephrolithotomy (PNL) has undergone an evolution in both equipment and technique. This evolution still continues today in the era of minimally invasive treatment options, and is evidenced by the numerous publications. PNL is generally advantageo...... patients managed with PNL worldwide and analyzed the data in detail, producing more than 25 scientific papers. And this update focuses on the lessons learned from the CROES PCNL Global Study....

  10. Percutaneous ethanol injection therapy of autonomous (toxic)thyroid nodules

    Institute of Scientific and Technical Information of China (English)

    Dieter Erich Apitzsch. M.D.; Staedtische Paracelsusklinik; Marl, Germany

    2005-01-01

    @@ Percutaneous ethanol injection therapy(PElT) has been established as an interventional method of the ablation of hepatic malignancies, especially hepatocellular carcinoma(HCC), since long. Its effects are based on cellular dehydration,toxic and coagulation necrosis and thrombosis of small venules within the tumour. The result is fibrosis of the damaged tissue, loss of function and shrinkage. Hence the "ablative" effect of absolute(95%) ethanol. The more confined ally lesion the better the ablative effect due to the high concentration of the toxic liquid. Highest effects will be achieved in encapsulated nodules which prevent diffusion of the toxic agent into surrounding normal tissue which is the case in HCC.

  11. Chemical and Biological Warfare: Should Rapid Detection Techniques Be Researched To Dissuade Usage? A Review

    Directory of Open Access Journals (Sweden)

    Mark R. Hurst

    2005-01-01

    Full Text Available Chemistry, microbiology and genetic engineering have opened new doorways for the human race to propel itself to a better future. However, there is a darker side to Bioengineering. One element of this is the manufacture and proliferation of biological and chemical weapons. It is clearly in the interest of humankind to prevent the future use of such weapons of mass destruction. Though many agents have been proposed as potential biological and chemical weapons, the feasibility of these weapons is a matter of conjecture. The unpredictable and indiscriminate devastation caused by natural epidemics and hazardous chemicals during wartime without medical treatment should warn humans of the dangers of employing them as weapons. This study argues rapid detection techniques may dissuade future use. Many agents are far less toxic to treatment. A quick response time to most attacks will decrease the chances of serious health issues. The agent will be less effective and discourage the attacker from using the weapon. Fortunately, the Chemical and Biological Weapons Convention (CWCIBWC allows defensive work in the area of biological and chemical weapons. Consequently, the review will discuss history, delivery/dispersal systems and specific agents of the warfare. The study presents current developments in biosensors for toxic materials of defense interest. It concludes with future directions for biosensor development.

  12. Pharmacology of antiplatelet agents.

    Science.gov (United States)

    Kalra, Kiran; Franzese, Christopher J; Gesheff, Martin G; Lev, Eli I; Pandya, Shachi; Bliden, Kevin P; Tantry, Udaya S; Gurbel, Paul A

    2013-12-01

    Pharmacotherapies with agents that inhibit platelet function have proven to be effective in the treatment of acute coronary syndromes, and in the prevention of complications during and after percutaneous coronary intervention. Because of multiple synergetic pathways of platelet activation and their close interplay with coagulation, current treatment strategies are based not only on platelet inhibition, but also on the attenuation of procoagulant activity, inhibition of thrombin generation, and enhancement of clot dissolution. Current strategies can be broadly categorized as anticoagulants, antiplatelet agents, and fibrinolytics. This review focuses on the pharmacology of current antiplatelet therapy primarily targeting the inhibition of the enzyme cyclooxygenase 1, the P2Y12 receptor, the glycoprotein IIb/IIIa receptor, and protease-activated receptor 1.

  13. Employing U.S. Information Operations Against Hybrid Warfare Threats

    Science.gov (United States)

    2013-03-01

    activities” ( CEMA ), which is a combination of Cyber and Electronic Warfare.115 However, the relationship between cyber and EW must be carefully considered...generating effects by themselves, as well as serving as a delivery means for MISO. The focus of CEMA may be as much to support combat operations

  14. Anti-submarine warfare with continuously active sonar

    NARCIS (Netherlands)

    Vossen, R. van; Beerens, S.P.; Spek, E. van der

    2011-01-01

    Existing surveillance sonar systems for anti-submarine warfare (ASW) use a pulsed sonar deployed at a low duty cycle. Continuously active sonar (CAS) is of special interest since the technique could provide better detection performance than conventional pulsed sonar, and it will provide the operator

  15. Trends in underwater warfare : From an underwater acoustics perspective

    NARCIS (Netherlands)

    Ort, C.M.; Driessen, F.P.G.

    2002-01-01

    Technological developments concerning underwater systems for Anti Submarine Warfare (ASW) and Mine Counter Measures (MCM) are directed at optimally countering the underwater threat in the near future. Countering the existing underwater threat is already extremely difficult, but there are several tre

  16. Public Discussion of Nuclear Warfare: A Time for Hope.

    Science.gov (United States)

    Cooper, Martha

    Anti-nuclear discourse, which peaked in 1981-82, signaled an emergence of public discourse on the nuclear warfare issue. During the development of the original atomic bomb, public discussion of the issue was severely restricted, but immediately after the bombing of Hiroshima and Nagasaki, discourse on the subject increased. During the Cold War…

  17. Just War and Postmodern Warfare: A German Case Study

    Science.gov (United States)

    2015-04-01

    Germany’s cognitive dissonance about the importance of military force and counter-insurgency operations in Afghanistan is an uphill battle they are still...1 Summary of Walzer’s Contemporary Just War Theory : ……............................................................2 Summary of...Postmodern Warfare Theory : .......................................................................................5 German Foreign Policy and Military

  18. Ethical Considerations of Computer Network Attack in Information Warfare

    Science.gov (United States)

    2001-01-16

    attack/destruction, and special information operations (SIO). CNA and the other methods of offensive IO represent the incorporation of information...psychological operations, electronic warfare, physical attack and/or destruction, and special information operations, and could include computer network...to computer networks to record information sent over them. 41 special information operations. Information operations that by their sensitive nature

  19. Management information systems for electronic warfare command and decision support

    CSIR Research Space (South Africa)

    Van Niekerk, B

    2015-04-01

    Full Text Available information to allow them to manage their own spectrum, to identify threats, and to deny adversaries’ use of the spectrum. In this paper, the concepts of integrated electronic warfare and spectrum battle management are introduced, and the relevant information...

  20. Improving Professional Development for USAF Electronic Warfare Officers

    Science.gov (United States)

    2012-02-15

    NOTE AIR WAR COLLEGE AIR UNIVERSITY IMPROVING PROFESSIONAL DEVELOPMENT FOR USAF ELECTRONIC WARFARE OFFICERS by Gregory M. Patschke, Col...and planning. Professional development comprises both continuing education and career development. In the US Air Force, the acquisition, space...and cyberspace communities have professional development programs already in place. For the continuing education half of professional development , the

  1. An unexpected plasma cholinesterase activity rebound after challenge with a high dose of the nerve agent VX.

    Science.gov (United States)

    Dorandeu, F; Foquin, A; Briot, R; Delacour, C; Denis, J; Alonso, A; Froment, M T; Renault, F; Lallement, G; Masson, P

    2008-06-27

    Organophosphorus chemical warfare agents (nerve agents) are to be feared in military operations as well as in terrorist attacks. Among them, VX (O-ethyl-S-[2-(diisopropylamino)ethyl] methylphosphonothioate) is a low volatility liquid that represents a percutaneous as well as an inhalation hazard if aerosolized. It is a potent irreversible cholinesterase (ChE) inhibitor that causes severe signs and symptoms, including respiratory dysfunction that stems from different mechanisms. VX-induced pulmonary oedema was previously reported in dogs but mechanisms involved are not well understood, and its clinical significance remains to be assessed. An experimental model was thus developed to study VX-induced cardiovascular changes and pulmonary oedema in isoflurane-anaesthetized swine. In the course of this study, we observed a fast and unexpected rebound of plasma ChE activity following inhibition provoked by the intravenous injection of 6 and 12 microg kg(-1) of VX. In whole blood ChE activity, the rebound could stay unnoticed. Further investigations showed that the rebound of plasma esterase activity was neither related to spontaneous reactivation of ChE nor to VX-induced increase in paraoxonase/carboxylesterase activities. A bias in Ellman assay, haemoconcentration or severe liver cytolysis were also ruled out. All in all, these results suggest that the rebound was likely due to the release of butyrylcholinesterase into the blood stream from ChE producing organs. Nature of the organ(s) and mechanisms involved in enzyme release will need further investigations as it may represent a mechanism of defence, i.e. VX scavenging, that could advantageously be exploited.

  2. Simulating cyber warfare and cyber defenses: information value considerations

    Science.gov (United States)

    Stytz, Martin R.; Banks, Sheila B.

    2011-06-01

    Simulating cyber warfare is critical to the preparation of decision-makers for the challenges posed by cyber attacks. Simulation is the only means we have to prepare decision-makers for the inevitable cyber attacks upon the information they will need for decision-making and to develop cyber warfare strategies and tactics. Currently, there is no theory regarding the strategies that should be used to achieve objectives in offensive or defensive cyber warfare, and cyber warfare occurs too rarely to use real-world experience to develop effective strategies. To simulate cyber warfare by affecting the information used for decision-making, we modify the information content of the rings that are compromised during in a decision-making context. The number of rings affected and value of the information that is altered (i.e., the closeness of the ring to the center) is determined by the expertise of the decision-maker and the learning outcome(s) for the simulation exercise. We determine which information rings are compromised using the probability that the simulated cyber defenses that protect each ring can be compromised. These probabilities are based upon prior cyber attack activity in the simulation exercise as well as similar real-world cyber attacks. To determine which information in a compromised "ring" to alter, the simulation environment maintains a record of the cyber attacks that have succeeded in the simulation environment as well as the decision-making context. These two pieces of information are used to compute an estimate of the likelihood that the cyber attack can alter, destroy, or falsify each piece of information in a compromised ring. The unpredictability of information alteration in our approach adds greater realism to the cyber event. This paper suggests a new technique that can be used for cyber warfare simulation, the ring approach for modeling context-dependent information value, and our means for considering information value when assigning cyber

  3. Duodenal perforation during percutaneous nephrolithotomy (PCNL ...

    African Journals Online (AJOL)

    A. Bansal

    2016-06-03

    Jun 3, 2016 ... Paediatric;. Percutaneous ... Percutaneous nephrolithotomy (PCNL) is a treatment of choice for large, complex or ... plications are minor, like for instance postoperative fever. Major ... A 7-year-old girl presented with bilateral flank pain. .... Written informed consent was obtained from the patient's parent.

  4. ANTITHROMBOTIC THERAPY AT PERCUTANEOUS CORONARY INTERVENTIONS

    Directory of Open Access Journals (Sweden)

    V. A. Sulimov

    2008-01-01

    Full Text Available Possibilities of modern antiplatelet and antithrombotic therapy at percutaneous coronary interventions in patients with coronary artery disease are surveyed. Data of multicenter randomized clinical trials and meta-analyses are discussed. Possibilities of various drugs at percutaneous coronary interventions are reported from position of the international clinical guidelines.

  5. Percutaneously implanted markers in peripheral lung tumours

    DEFF Research Database (Denmark)

    Persson, G.F.; Josipovic, Mirjana; Nygaard, Ditte Eklund

    2013-01-01

    A letter to the editor is presented which is concerned with research which investigated percutaneously implanted markers in peripheral lung tumours and their complications.......A letter to the editor is presented which is concerned with research which investigated percutaneously implanted markers in peripheral lung tumours and their complications....

  6. Chemosaturation Percutaneous Hepatic Perfusion: A Systematic Review.

    Science.gov (United States)

    Vogel, Arndt; Gupta, Sanjay; Zeile, Martin; von Haken, Rebecca; Brüning, Roland; Lotz, Gösta; Vahrmeijer, Alexander; Vogl, Thomas; Wacker, Frank

    2017-01-01

    The Hepatic CHEMOSAT(®) Delivery System is an innovative medical device for the treatment of patients with unresectable primary liver tumors or unresectable hepatic metastases from solid organ malignancies. This system is used to perform chemosaturation percutaneous hepatic perfusion (CS-PHP), a procedure in which a high dose of the chemotherapeutic agent melphalan is delivered directly to the liver while limiting systemic exposure. In a clinical trial program, CS-PHP with melphalan significantly improved hepatic progression-free survival in patients with unresectable hepatic metastases from ocular or cutaneous melanoma. Clinically meaningful hepatic responses were also observed in patients with hepatocellular carcinoma or neuroendocrine tumors. Furthermore, the results of published studies and case reports demonstrated that CS-PHP with melphalan resulted in favorable tumor response rates in a range of tumor histologies (ocular or cutaneous melanoma, colorectal cancer, and hepatobiliary tumors). Analyses of the safety profile of CS-PHP revealed that the most common adverse effects were hematologic events (thrombocytopenia, anemia, and neutropenia), which were clinically manageable. Taken together, these findings indicate that CS-PHP is a promising locoregional therapy for patients with primary and secondary liver tumors and has a acceptable safety profile.

  7. FOA Information from the Research Institute of Swedish National Defence on Electronic Warfare (FOA Orientar om Electronic Warfare),

    Science.gov (United States)

    1967-01-01

    modified. If it is appears as if the psychological It is hardly likely. however. known that the opponent has a warfare element involved there- that the most...34 . -roadeatla - ".-Rhdar Raa -* * - cldignsl Toi~loieey aft u comunication , ntavigation -ctionl Examples of applications Radar bands FroquaP" UMI 0.1

  8. Effects of CW (chemical warfare)-related chemicals on social behavior and performance. Annual report, 30 September 1984-29 September 1985

    Energy Technology Data Exchange (ETDEWEB)

    Bunnell, B.N.; Iturrian, W.B.

    1985-10-01

    This report summarizes work accomplished in the second year of a three-year project aimed at developing a battery of tests of social behavior and performance that wil be sensitive to the effects of chemical warfare-related chemicals considered for use as antidotes or prophylactics against chemical-warfare agents. Procedures for assessing social behavior in nonhuman primates are described and compared. Performance scores on three operant schedules, a test of complex problem solving, and behavior in a novel environment are presented and correlations between the social and performance variables are examined. The effects of atropines on several of the social and performance measures are reported as are data from plasma hormone assays for cortisol and prolactin.

  9. [The percutaneous absorption of diclofenac].

    Science.gov (United States)

    Riess, W; Schmid, K; Botta, L; Kobayashi, K; Moppert, J; Schneider, W; Sioufi, A; Strusberg, A; Tomasi, M

    1986-07-01

    The percutaneous absorption of diclofenac diethylammonium 1.16% (w/w) in a combination of emulsion cream and gel (Voltaren Emulgel) and of diclofenac sodium 1% (w/w) in a cream formulation (Voltaren cream) was investigated in guinea-pig, rabbit and man. The percutaneous absorption of diclofenac sodium in guinea-pig was 3 to 6% of the dose when the cream formulation in doses of 320, 100 or 40 mg was applied on 10 cm2 of occluded skin and left in place for 6 h. The transdermal delivery of 14C-labelled diclofenac yielded plateau plasma concentrations of radiotracer from 1.5 h after application until removal of the residual cream. Subsequently the steady state drug depots in the skin and muscle tissue were depleted promptly. During daily administration the steady state levels in the muscle tissue in proximity to the application site were about 3 times higher than in distant muscle tissue. By topical application on knee joints of rabbits diclofenac penetrated into the patellar ligament, the adipose corpus and the synovial fluid. In man the percutaneous absorption was 6% of the dose when the Emulgel formulation was spread by 5 mg/cm2 and left for 12 h on non-occluded skin. The pattern of metabolites of diclofenac in human urine was the same after topical and oral administration. In man, upon daily topical administration of 3 times 2.5 g cream formulation (10 mg/cm2) the diclofenac steady state plasma levels were 20 to 40 nmol/l.(ABSTRACT TRUNCATED AT 250 WORDS)

  10. Percutaneous Surgery of the Forefoot.

    Science.gov (United States)

    Redfern, David; Vernois, Joel; Legré, Barbara Piclet

    2015-07-01

    This article describes some of the common techniques used in percutaneous surgery of the forefoot. Techniques such as minimally invasive chevron Akin osteotomy for correction of hallux valgus, first metatarsophalangeal joint cheilectomy, distal minimally invasive metatarsal osteotomies, bunionette correction, and hammertoe correction are described. This article is an introduction to this rapidly developing area of foot and ankle surgery. Less invasive techniques are continually being developed across the whole spectrum of surgical specialties. The surgical ethos of minimizing soft-tissue disruption in the process of achieving surgical objectives remains at the center of this evolution.

  11. Recent Advances in Percutaneous Nephrolithotomy

    Directory of Open Access Journals (Sweden)

    Erem Kaan Basok

    2014-05-01

    Full Text Available The continuous innovations in technology, instrumentations, and techniques allow urologists to perform percutaneous nephrolithotomy (PCNL with increasing efficacy. Although recent advances have facilitated the procedure, some steps are still challenging. A thorough review of the recent urologic literature was performed to identify these improvements in PCNL technique. The newer developments mainly focused on multimodal imaging techniques, miniaturisation of instruments, tracking and navigation systems during access to the stone, and robotic systems. Further studies are necessary to better define the benefits of these new fruitful developments which remain an active research field.

  12. Evolution of Unmanned Aerial Warfare: A Historical Look at Remote Airpower - A Case Study in Innovation

    Science.gov (United States)

    2016-06-10

    EVOLUTION OF UNMANNED AERIAL WARFARE: A HISTORICAL LOOK AT REMOTE AIRPOWER—A CASE STUDY IN INNOVATION A thesis presented to...JUN 2016 4. TITLE AND SUBTITLE Evolution of Unmanned Aerial Warfare: A Historical Look at Remote Airpower—A Case Study in Innovation 5a...Warfare: A Historical Look at Remote Airpower—A Case Study in Innovation Approved by: , Thesis Committee Chair John T. Kuehn, Ph.D

  13. Electronic Warfare M-on-N Digital Simulation Logging Requirements and HDF5: A Preliminary Analysis

    Science.gov (United States)

    2017-04-12

    E. Jarvis Electronic Warfare M-on- N Digital Simulation Logging Requirements and HDF5: A Preliminary Analysis Advanced Techniques Branch Tactical...12-04-2017 NRL Memorandum Report Electronic Warfare M-on- N Digital Simulation Logging Requirements and HDF5: A Preliminary Analysis Donald E...ELECTRONIC WARFARE M-ON- N DIGITAL SIMULATION LOGGING REQUIREMENTS AND HDF5: A PRELIMINARY ANALYSIS 1. INTRODUCTION HDF5 technology [Folk] has been

  14. Bioterrorism and Biological Warfare, from Past to the Present: A classic review

    Directory of Open Access Journals (Sweden)

    Majid Zare Bidaki

    2015-10-01

    Full Text Available Bioterrorism is defined as any terrorist action of intentional release or dissemination of highly pathogenic biological agents, including a variety of microorganisms or biological toxins. With the growing threat of terrorism, is necessary that the potential danger of various microorganisms – as a powerful tool of aggression and threat- to be taken seriously. This review tries to explain the concept of biological weapons and their historical development process with an emphasis on efforts to control the proliferation of these types of weapons over the last century. Potential impact of infectious diseases on people and armed forces was known from since 600 BC. Using the victims of the plague as a weapon in medieval warfare and spread of smallpox as a weapon during the war against the Indians when initially America was discovered, the development of biological weapons during the World War I, World War II and the Cold War, and even since the beginning of the third millennium, all show the strategic importance of pathogenic microorganisms as a deterrent power for the superiority of some governments and cults. Historical attempts to use infectious diseases as biological weapons reveal that the distinction between a natural outbreak of an infectious disease and that of a deliberate biological attack is very difficult. Abusing this characteristic of infectious diseases has made it possible for the purposes of superiority. International agreements to control the development of biological weapons, such as “the 1925 Geneva Protocol” and “the Convention on the Prohibition of the Development, Production and Stockpiling of Biological and Toxic Weapons” have not been able to control the development and using of biological warfare.  The current paper is a classic review (Overview article aiming at increasing the knowledge and awareness of people especially of health authorities and government officials.

  15. Pentane-1,5-diol as a percutaneous absorption enhancer.

    Science.gov (United States)

    Faergemann, Jan; Wahlstrand, Björn; Hedner, Thomas; Johnsson, Jörgen; Neubert, Reinhard H H; Nyström, Lena; Maibach, Howard

    2005-12-01

    Propylene glycol (propane-1,2-diol) is the only diol widely used in dermatology. Pentane-1,5-diol is mainly used as a plasticizer in cellulose products and adhesives, in dental composites and in brake fluid compositions and as a preservative for grain. However, pentane-1,5-diol is also an effective solvent, water-binding substance, antimicrobial agent and preservative and may therefore replace several ingredients in a skin composition. The release of tri-iodothyroacetic acid (TRIAC) and percutaneous absorption of hydrocortisone and mometasone furoate with either pentane-1,5-diol or propane-1,2-diol and 2-methyl-pentane-2,4-diol (hexylene glycol), respectively, as enhancers was compared. The release of TRIAC was 21% higher when pentane-1,5-diol was used as an enhancer instead of propane-1,2-diol. The percutaneous absorption of hydrocortisone through the skin was increased 12 times with propane-1,2-diol compared to 4.4 times with pentane-1,5-diol. However, the percutaneous absorption of hydrocortisone into the skin was 50% higher with pentane-1,5-diol compared to propane-1,2-diol. There was no significant difference, between the original mometasone furoate cream, with 2-methyl-pentane-2,4-diol, and the new cream with pentane-1,5-diol in the amount of mometasone furoate that was absorbed into the skin and through the skin. However, the cosmetic properties of the new mometasone furoate cream was superior to the original mometasone furoate cream, for examples, no bad odour, more even texture, goes better into the skin and has less greasiness. Pentane-1,5-diol can be used as a technology platform, which adds a series of desirable properties to dermatological preparations and enhances product usability. This will result in improved formulations for a series of major and commonly used dermatological drugs. When used in pharmaceutical topical preparations, pentane-1,5-diol will increase the percutaneous absorption of the active substance and it is an efficient antimicrobial

  16. Percutaneous penetration studies for risk assessment

    DEFF Research Database (Denmark)

    Sartorelli, Vittorio; Andersen, Helle Raun; Angerer, Jürgen

    2000-01-01

    . In order to predict the systemic risk of dermally absorbed chemicals and to enable agencies to set safety standards, data is needed on the rates of percutaneous penetration of important chemicals. Standardization of in vitro tests and comparison of their results with the in vivo data could produce...... of percutaneous penetration. This paper is an outcome of the meetings of the Percutaneous Penetration Subgroup and reports the presentations on the key issues identified throughout the 3-year duration of the Dermal Exposure Network (1997-1999)....

  17. Stuxnet and Cyber-Warfare (1/2)

    CERN Document Server

    CERN. Geneva

    2016-01-01

    The first part of the lecture is devoted to the description of the Stuxnet worm, the first cyber-weapon whose existence has been made public, discovered in 2010 and targeting a specific industrial control system; the worm is responsible for the damaging of many centrifuges at an uranium enrichment facility, with the goal of sabotaging Iran's nuclear program. In the second part, the main features of cyber-warfare in conflict and pre-conflict activities will be discussed and compared to the conventional warfare domains, with also a general view at the international political debate on this topic. Check the http://pugwash.org web site, an organisation that seeks a world free of nuclear weapons and other weapons of mass destruction.   NB! All Academic Training lectures are recorded and are publicly available. There is no live webcast.

  18. Stuxnet and Cyber-Warfare (2/2)

    CERN Document Server

    CERN. Geneva

    2016-01-01

    The first part of the lecture is devoted to the description of the Stuxnet worm, the first cyber-weapon whose existence has been made public, discovered in 2010 and targeting a specific industrial control system; the worm is responsible for the damaging of many centrifuges at an uranium enrichment facility, with the goal of sabotaging Iran's nuclear program. In the second part, the main features of cyber-warfare in conflict and pre-conflict activities will be discussed and compared to the conventional warfare domains, with also a general view at the international political debate on this topic.   Check the http://pugwash.org web site, an organisation that seeks a world free of nuclear weapons and other weapons of mass destruction. The lecturer invites comments via email to Gian.Piero.Siroli@cern.ch NB! All Academic Training lectures are recorded and are publicly available. There is no live webcast.

  19. A short history of biological warfare.

    Science.gov (United States)

    Metcalfe, Neil

    2002-01-01

    Biological weapons have been used in war from the start of recorded history. This article reviews the history of the subject, including the outbreak of the Black Death and the use of smallpox against American Indians. The new science of microbiology was misused from soon after its start and, despite the 1925 Geneva Protocol, the Japanese experimented extensively on prisoners in China. The Allies carried out extensive research during the Second World War, notably the United Kingdom into anthrax on Gruinard Island and the United States into a variety of agents. Despite the 1972 Biological Weapons Convention (BWC), a major programme continued in the former Soviet Union (leading to an accidental outbreak of anthrax). Most recently Iraq was revealed as having an extensive programme, with weaponization of large amounts of various agents, and several terrorists groups have attempted to use biological agents as weapons. Modern developments in biotechnology could lead to even more serious developments, and effective preventive measures, including strengthening of the BWC, are imperative.

  20. USMC Electronic Warfare 2025: Trading Expertise for Advanced Technology

    Science.gov (United States)

    2011-04-15

    airborne electronic warlare during the transition period away from legacy equipment. EA-6B pilots and Electroilic Countermeasures Officers ( ECMOs ...Electronic Warfare (EW) capability. As an EA-6B Electronic Countenneasures Officer ( ECMO ), I anticipate that both the United States Marine Corps and all... ECMOs . An increased workload for Radio Battalion will have the same effect that the assumption of an additional function of Marine aviation will have on

  1. China's Use of Cyber Warfare: Espionage Meets Strategic Deterrence

    OpenAIRE

    2011-01-01

    This article presents three reasons for states to use cyber warfare and shows that cyberspace is—and will continue to be—a decisive element in China's strategy to ascend in the international system. The three reasons are: deterrence through infiltration of critical infrastructure; military technological espionage to gain military knowledge; and industrial espionage to gain economic advantage. China has a greater interest in using cyberspace offensively than other actors, such as the United St...

  2. Enterprises as Inquiring Systems with Implications for Information Warfare

    Science.gov (United States)

    2014-06-01

    defined as the “integrated employment of the core capabilities of electronic warfare, computer network operations, psychological operations, military...comprehension (also explicitly included in Figure 3). The entire spectrum of deception, psychological operations, and all means to impact human-centered...with the same input data (other than ground truth) via different channels and that data must be consistent within itself. The belief in empiricism to

  3. Wrestling the Bear: The Rise of Russian Hybrid Warfare

    Science.gov (United States)

    2015-04-13

    integrity. Essentially, Russia - and more directly- Vladimir Putin perceive that Russia is in an ideological struggle with the US and Europe. 1 Carl Von...conducted in a hybrid manner, though all the instruments of national power. 31 Though the nearly continuous strategic leadership of Vladimir Putin , Russia ...with a sharp focus on Vladimir Putin ’s strategic leadership, highlights the evolution ofthe Russian brand of hybrid warfare (HW). The analysis also

  4. Beyond Mission Command: Maneuver Warfare for Cyber Command and Control

    Science.gov (United States)

    2015-05-18

    elements with maneuver warfare, mission command’s decentralization of execution through the use of mission-type orders is a more centralized form... decentralized command and control organization will instill an innovative organizational culture. Innovation will be able to freely prosper in an...warfare’s decentralized command and control doctrine to maximize military cyberspace operations. Since the establishment of U.S. Cyber Command in 2009

  5. The Enemy Below: Preparing Ground Forces for Subterranean Warfare

    Science.gov (United States)

    2013-12-01

    can endanger the lives of U.S. forces and render mechanical breaching tools inoperable. Air blowers can be used as a hasty means to ventilate a... Penguin Books, 1996). 179 Tom Mangold, The Tunnels of Cu Chi (New York, NY: Random House, 1985). 147 6. A Historical Analysis of Tunnel Warfare and... Penguin Group, 1996. 157 Lester, W. G., & Ali, A. J. “Underground Combat: Stereophonic Blasting, tunnel Rats, and the Soviet-Afghan War.” Engineer

  6. Russian and Chinese Information Warfare: Theory and Practice

    Science.gov (United States)

    2004-06-01

    Integral neurolinguistic programming •Placing essential programs into the conscious or sub- conscious mind •Subconscious suggestions that modify human...Generators of special rays •Optical systems • Neurolinguistic programming •Computer psychotechnology •The mass media •Audiovisual effects •Special effects...Information Warfare: Theory and Practice 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER 5e

  7. Cyberspace Warfare: A New DoD Core Mission Area

    Science.gov (United States)

    2013-05-01

    states to take note. Cyber issues such as these should be seen in light of the ancient dictum that “a victorious army first wins and then seeks...Examples from ancient Greece, Prussia, and World War II are illustrated to present cases where innovative leaders adapted and modified their methods to...conduct warfare and integrated them into their strategic approach to achieve their desired end states. Alexander the Great conquered Persia in three

  8. Constitution aims to bring an end to health economy warfare.

    Science.gov (United States)

    Harding, Mary-Louise; Martin, Daniel

    2005-02-10

    A rough new constitution is being drawn up for the NHS in a bid to prevent health economies sliding into bitter 'Bradford-style' warfare in the era of foundations trusts and payment by results. The rules of engagement are part of a package of measures designed to rescue some of the government's flagship reforms amid warnings from audit chiefs on the impact of PbR.

  9. Exposure to a First World War blistering agent.

    Science.gov (United States)

    Le, H Q; Knudsen, S J

    2006-04-01

    Sulfur mustards act as vesicants and alkylating agents. They have been used as chemical warfare since 1917 during the first world war. This brief report illustrates the progression of injury on a primary exposed patient to a first world war blistering agent. This case documents the rapid timeline and progression of symptoms. It emphasises the importance of appropriate personal protective equipment and immediate medical response plan with rapid decontamination and proper action from military and civilian medical treatment facilities. This case reports the first US active duty military exposure to a blistering agent in the age of global terrorism.

  10. Echo chamber and trench warfare dynamics in online debates.

    Science.gov (United States)

    Karlsen, Rune; Steen-Johnsen, Kari; Wollebæk, Dag; Enjolras, Bernard

    2017-06-01

    In this article, we take issue with the claim by Sunstein and others that online discussion takes place in echo chambers, and suggest that the dynamics of online debates could be more aptly described by the logic of 'trench warfare', in which opinions are reinforced through contradiction as well as confirmation. We use a unique online survey and an experimental approach to investigate and test echo chamber and trench warfare dynamics in online debates. The results show that people do indeed claim to discuss with those who hold opposite views from themselves. Furthermore, our survey experiments suggest that both confirming and contradicting arguments have similar effects on attitude reinforcement. Together, this indicates that both echo chamber and trench warfare dynamics - a situation where attitudes are reinforced through both confirmation and disconfirmation biases - characterize online debates. However, we also find that two-sided neutral arguments have weaker effects on reinforcement than one-sided confirming and contradicting arguments, suggesting that online debates could contribute to collective learning and qualification of arguments.

  11. Electronic Warfare:Issues and Challenges for Emitter Classification

    Directory of Open Access Journals (Sweden)

    Manish Gupta

    2011-04-01

    Full Text Available Electronic warfare (EW is an important capability that provides advantage to defence forces over their adversaries. Defence forces gather tactical intelligence through EW sensors, which provide the means to counter hostile actions of enemy forces. Functions of an EW system is threat detection and the area surveillance so as to determine the identity of surrounding emitters. Emitter classification system identifies possible threats by analysing intercepted signals. Problem of identifying emitters based on its intercepted signal characteristics is a challenging problem in electronic warfare studies. Major issues and challenges for emitter classification such as drifting of emitter parameters due to aging, operational characteristic of an emitter, i.e., same emitter can operate on multiple bands and multiple pulse repetition frequencies (PRFs are highlighted. A novel approach based on some well-known statistical methods, e.g., regression analysis, hypothesis testing, and discriminent analysis is proposed. The effectiveness of the proposed approach has been tested over ELINT (Electronic Intelligence data and illustrated using simulation data. The proposed approach can play a solution for wide variety of problems in emitter classification in electronic warfare studies.Defence Science Journal, 2011, 61(3, pp.228-234, DOI:http://dx.doi.org/10.14429/dsj.61.529

  12. Percutaneous treatment of liver hydatid cysts

    Energy Technology Data Exchange (ETDEWEB)

    Akhan, Okan; Oezmen, Mustafa N

    1999-10-01

    Hydatic disease caused by Echinococcus granulosus is an endemic disease and an important public health problem in some countries of the world. The results of surgical treatment are associated with a high rate of mortality, morbidity, postoperative recurrence and a long period of hospital stay and the medical treatment results are still controversial. Although the percutaneous aspiration and treatment of liver hydatid cysts were considered to be contraindicated due to risks of anaphylactic shock and dissemination of clear-crystal fluid into the abdomen, several reports of successful percutaneous treatment of liver hydatid cysts have been published in the literature. Today, percutaneous treatment of liver hydatid cysts is the most effective and reliable treatment procedure in the selected cases. In this review, indications, contraindications, method and techniques, healing criteria, complications, results and importance of the percutaneous treatment of liver hydatid cysts are discussed.

  13. Prone and supine percutaneous nephrolithotomy.

    Science.gov (United States)

    Lucarelli, G; Breda, A

    2013-06-01

    Since the first successful stone extraction through a nephrostomy in 1976, percutaneous nephrolithotomy (PCNL) has became the preferred procedure especially for treatment of large, complex and staghorn calculi. For decades this method has been performed with the patient in the prone position. More recently, particular interest has been taken on supine PCNL due to less anestesiological risks and the possibility of simultaneous anterograde and retrograde access to the whole urinary tract. Although many retrospective studies have been published, only two prospective trials comparing the two positions are reported in the literature. The best access to PCNL represents still a controversial issue. The overall experience reported in literature indicates that each modality is equally feasible and safe. Therefore, to date the surgeon's preference is the prime indication to one access over the other.

  14. Bivalirudin in percutaneous coronary intervention

    Directory of Open Access Journals (Sweden)

    Sam J Lehman

    2006-12-01

    Full Text Available Sam J Lehman, Derek P ChewDepartment of Medicine, Flinders University, South Australia, AustraliaAbstract: Bivalirudin is a member of the direct thrombin inhibitor group of anticoagulants. It has been evaluated as an alternative to unfractionated and low-molecular-weight heparins in the settings of percutaneous coronary intervention (PCI and acute coronary syndrome (ACS. Results of clinical trials to date suggest bivalirudin is a viable alternative to the use of a heparin combined with a glycoprotein (GP IIb/IIIa inhibitor in these settings. Thrombin has a central role in coagulation and platelet activation in ACS and during PCI. Its direct inhibition is an attractive target for therapy in these settings. Bivalirudin is a 20 amino acid polypeptide hirudin analog. It displays bivalent and reversible binding to the thrombin molecule, inhibiting its action. Direct inhibition of thrombin with bivalirudin has theoretical pharmacokinetic and pharmacodynamic advantages over the indirect anticoagulants. A reduction in rates of bleeding without loss of anti-thrombotic efficacy has been a consistent finding across multiple clinical trials. There may be economic benefits to the use of bivalirudin if it permits a lower rate of use of the GP IIb/IIIa inhibitors. This article reviews the pharmacology of bivalirudin and clinical trial evidence to date. There are now data from multiple clinical trials and meta-analyses in the setting of ACS and PCI. Early results from the acute catheterization and urgent intervention strategy (ACUITY trial are discussed. Keywords: bivalirudin, direct thrombin inhibitor, acute coronary syndrome, percutaneous coronary intervention

  15. [Percutaneous myocardial laser revascularization (PMR)].

    Science.gov (United States)

    Lauer, B; Stahl, F; Bratanow, S; Schuler, G

    2000-09-01

    In patients with severe angina pectoris due to coronary artery disease, who are not candidates for either percutaneous coronary angioplasty or coronary artery bypass surgery, transmyocardial laser revascularization (TMR) often leads to improvement of clinical symptoms and increased exercise capacity. One drawback of TMR is the need for surgical thoracotomy in order to gain access to the epicardial surface of the heart. Therefore, a catheter-based system has been developed, which allows creation of laser channels into the myocardium from the left ventricular cavity. Between January 1997 and November 1999, this "percutaneous myocardial laser revascularization" (PMR) has been performed in 101 patients at the Herzzentrum Leipzig. In 63 patients, only 1 region of the heart (anterior, lateral, inferior or septal) was treated with PMR, in 38 patients 2 or 3 regions were treated in 1 session. There were 12.3 +/- 4.5 (range 4 to 22) channels/region created into the myocardium. After 3 months, the majority of patients reported significant improvement of clinical symptoms (CCS class at baseline: 3.3 +/- 0.4, after 6 months: 1.6 +/- 0.8) (p PMR, the CCS class after 2 years was 1.3 +/- 0.7, exercise capacity was 500 +/- 193 s. However, thallium scintigraphy failed to show increased perfusion in the PMR treated regions. The pathophysiologic mechanisms of myocardial laser revascularization is not yet understood. Most of the laser channels are found occluded after various time intervals after intervention. Other possible mechanisms include myocardial denervation or angioneogenesis after laser revascularization, however, unequivocal evidence for these theories is not yet available. In conclusion, PMR seems to be a safe and feasible new therapeutic option for patients with refractory angina pectoris due to end-stage coronary artery disease. The first results indicate improvement of clinical symptoms and increased exercise capacity, whereas evidence of increased perfusion after laser

  16. Duodenal damage complicating percutaneous access to kidney

    OpenAIRE

    Antonio Corrêa Lopes Neto; Marcos Tobias-Machado; Roberto Vaz Juliano; Marco Aurélio Lipay; Milton Borrelli; Eric Roger Wroclawski

    2000-01-01

    CONTEXT: Since the first percutaneous nephrostomy performed by Goodwin in 1954, technical advances in accessing the kidneys via percutaneous puncture have increased the use of this procedure and thus the complications too. Among these complications, digestive tract damage is not common. DESIGN: Case report. CASE REPORT: We report a duodenal lesion that was corrected using surgical exploration and we touch on the therapeutic options, which may be conservative or interventionist. We chose conse...

  17. Pulmonary Cement Embolism following Percutaneous Vertebroplasty

    Directory of Open Access Journals (Sweden)

    Ümran Toru

    2014-01-01

    Full Text Available Percutaneous vertebroplasty is a minimal invasive procedure that is applied for the treatment of osteoporotic vertebral fractures. During vertebroplasty, the leakage of bone cement outside the vertebral body leads to pulmonary cement embolism, which is a serious complication of this procedure. Here we report a 48-year-old man who was admitted to our hospital with dyspnea after percutaneous vertebroplasty and diagnosed as pulmonary cement embolism.

  18. Infective endocarditis following percutaneous pulmonary valve replacement

    DEFF Research Database (Denmark)

    Cheung, Gary; Vejlstrup, Niels; Ihlemann, Nikolaj;

    2013-01-01

    Infective endocarditis (IE) following percutaneous pulmonary valve replacement (PPVR) with the Melody valve is rarely reported. Furthermore, there are challenges in this diagnosis; especially echocardiographic evidence of vegetation within the prosthesis may be difficult.......Infective endocarditis (IE) following percutaneous pulmonary valve replacement (PPVR) with the Melody valve is rarely reported. Furthermore, there are challenges in this diagnosis; especially echocardiographic evidence of vegetation within the prosthesis may be difficult....

  19. Percutaneous catheter drainage of intrapulmonary fluid collection

    Energy Technology Data Exchange (ETDEWEB)

    Park, E. D.; Kim, H. J.; Choi, P. Y.; Jung, S. H. [Gyeongsang National University Hospital, Chinju (Korea, Republic of)

    1994-01-15

    With the success of percutaneous abdominal abscess drainage, attention is now being focused on the use of similar techniques in the thorax. We studied to evaluate the effect of percutaneous drainage in parenchymal fluid collections in the lungs. We performed percutaneous drainage of abscesses and other parenchymal fluid collections of the lungs in 15 patients. All of the procedures were performed under the fluoroscopic guidance with an 18-gauge Seldinger needle and coaxial technique with a 8-10F drainage catheter. Among 10 patients with lung abscess, 8 patients improved by percutaneous catheter drainage. In one patient, drainage was failed by the accidental withdrawal of the catheter before complete drainage. One patient died of sepsis 5 hours after the procedure. Among three patients with complicated bulla, successful drainage was done in two patients, but in the remaining patient, the procedure was failed. In one patient with intrapulmonary bronchogenic cyst, the drainage was not successful due to the thick internal contents. In one patient with traumatic hematoma, after the drainage of old blood clots, the signs of infection disappeared. Overally, of 14 patients excluding one who died, 11 patients improved with percutaneous catheter drainage and three patients did not. There were no major complications during and after the procedure. We conclude that percutaneous catheter drainage is effective and safe procedure for the treatment of parenchymal fluid collections of the lung in patients unresponsive to the medical treatment.

  20. Mustard Group Chemical War Agents from Preventive Medicine Perspective

    Directory of Open Access Journals (Sweden)

    Muharrem Ucar

    2007-06-01

    Full Text Available Although many preventive efforts and treaties, chemical warfare agents have still been a severe assault form against both military and civilian individuals. The most important chemical warfare agents sulphur mustard and others are easy to handle and cheap those the important reasons to accept sulphur mustard as a chemical warfare agent. Many individuals attacked by sulphur mustard have severe health problems such as respiratory system diseases. After ten years of sulphur mustard exposure, several health problems such as respiratory tract problems (%42.5, eye problems (%40 and other systemic diseases have been observed to insist on induviduals when examined. Exposure of even single sulphur mustard exposure has been seen to result high level of disability and early deaths. In spite of the fact that there is no available antidote and/or remedy against sulphur mustard exposure, our country has an incremental chemical assault threat for both military personels and civilians because of its jeopolitics position. Experimental studies regarding sulphur mustard toxicity will be helpful for novel preventive strategies and antidot devolepment. [TAF Prev Med Bull 2007; 6(3.000: 209-214

  1. Stroke from Delayed Embolization of Polymerized Glue Following Percutaneous Direct Injection of a Carotid Body Tumor

    Energy Technology Data Exchange (ETDEWEB)

    Krishnamoorthy, Thamburaj; Gupta, Arun Kumar; Rajan, Jayadevan E; Thomas, Bejoy [Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, (India)

    2007-06-15

    Direct percutaneous embolization of hypervascular tumors results in more effective preoperative devascularization. Migration of glue is a well known complication of direct glue injection and it may lead to stroke or cranial nerve deficits. We report here on a case of carotid body tumor in a 52-year-old man; the tumor was mainly embolized by percutaneous injection of 50% glue and this was supported with balloon protection of the internal carotid artery. Thirteen hours later, he developed hemiparesis from delayed migration of glue. The possible mechanisms of this migration are discussed and preventive measures are suggested. Preoperative embolization of hypervascular tumors of the head and neck, including carotid body tumor, is often performed to decrease the amount of blood loss during surgery. Devascularization is mainly performed with particulate agents and by employing the transarterial route. More effective embolization may be achieved by performing percutaneous direct embolization of hypervascular tumors with liquid embolic agents. Even though there are few reports available on direct embolization, complications from glue migration have been reported, and this mainly happens during the procedure when the glue is in a liquid state. We report here on a case of delayed migration of polymerized glue (n-butyl-2-cyanoacrylate [NBCA]), many hours after the procedure, into the intracranial circulation and the final result was stroke. A 52-year-old male with right carotid body tumor underwent direct percutaneous glue (n-butylcyanoacrylate [NBCA]) embolization. Several hours later, he developed left hemiparesis from embolization of the polymerized glue cast. Migration of glue during percutaneous tumor embolization is presumed to occur only in the liquid state, which may lead to stroke or cranial nerve deficits. To the best of our knowledge, this is the first report of delayed glue embolization from a treated hypervascular tumor of the head and neck.

  2. Assessing Protection Against OP Pesticides and Nerve Agents Provided by Wild-Type HuPON1 Purified from Trichoplusia ni Larvae or Induced via Adenoviral Infection

    Science.gov (United States)

    2013-01-01

    times the median lethal dose (LD50) of the OP nerve agents tabun (GA), sarin (GB), soman (GD), and cyclosarin (GF), or chlorpyrifos oxon, the toxic...Doctor, M.P. Nambiar, Efficient hydrolysis of the chemical warfare nerve agent tabun by recombinant and purified human and rabbit serum paraoxonase

  3. Status of dental health in chemical warfare victims: The case of Isfahan, Iran

    Directory of Open Access Journals (Sweden)

    Ahmad Mottaghi

    2012-01-01

    Conclusion: Chemical warfare victims have relatively poor dental/oral health. Chemical injury might cause a dysfunction in saliva secretion, with decrease in saliva secretion increasing the risk for tooth decay and periodontal disorders. Further research is required to find out the exact underlying mechanisms and the factors associated with poor dental/oral health in chemical warfare victims.

  4. Cyber Warfare: China’s Strategy to Dominate in Cyber Space

    Science.gov (United States)

    2011-06-10

    Revolution.‖ 64Jason Fritz, ―How China will use cyber warfare to leapfrog in military competitiveness,‖ Culture Mandala : The Bulletin of the Centre for East...cyber warfare to leapfrog in military competitiveness.‖ Culture Mandala : The Bulletin of the Centre for East-West Culture and Economic Studies 8 no. 1

  5. Investigating the Hydrolysis Reactions of a Chemical Warfare Agent Surrogate. A Systematic Study using 1H, 13C, 17O, 19F, 31P, and 35Cl NMR Spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Alam, Todd M. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Wilson, Brendan W. [West Virginia Univ., Morgantown, WV (United States)

    2015-07-24

    During the summer of 2015, I participated in the DHS HS-STEM fellowship at Sandia National Laboratories (SNL, NM) under the supervision of Dr. Todd M. Alam in his Nuclear Magnetic Resonance (NMR) Spectroscopy research group. While with the group, my main project involved pursing various hydrolysis reactions with Diethyl Chlorophosphate (DECP), a surrogate for the agent Sarin (GB). Specifically, I performed different hydrolysis reactions, monitored and tracked the different phosphorous containing species using phosphorous (31P) NMR spectroscopy. With the data collected, I performed kinetics studies mapping the rates of DECP hydrolysis. I also used the NMR of different nuclei such as 1H, 13C, 17O, and 35Cl to help understand the complexity of the reactions that take place. Finally, my last task at SNL was to work with Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) NMR Spectroscopy optimizing conditions for 19F- 31P filtering NMR experiments.

  6. Quantitation of five organophosphorus nerve agent metabolites in serum using hydrophilic interaction liquid chromatography and tandem mass spectrometry

    OpenAIRE

    Hamelin, Elizabeth I.; Schulze, Nicholas D.; Shaner, Rebecca L.; Coleman, Rebecca M.; Lawrence, Richard J.; Crow, Brian S.; Jakubowski, E. M.; Johnson, Rudolph C.

    2014-01-01

    Although nerve agent use is prohibited, concerns remain for human exposure to nerve agents during decommissioning, research, and warfare. Exposure can be detected through the analysis of the hydrolysis products in urine as well as blood. An analytical method to detect exposure to five nerve agents, including VX, VR (Russian VX), GB (sarin), GD (soman) and GF (cyclosarin), through the analysis of the hydrolysis products, which are the primary metabolites, in serum has been developed and charac...

  7. Multiscale modeling of nerve agent hydrolysis mechanisms: a tale of two Nobel Prizes

    Science.gov (United States)

    Field, Martin J.; Wymore, Troy W.

    2014-10-01

    The 2013 Nobel Prize in Chemistry was awarded for the development of multiscale models for complex chemical systems, whereas the 2013 Peace Prize was given to the Organisation for the Prohibition of Chemical Weapons for their efforts to eliminate chemical warfare agents. This review relates the two by introducing the field of multiscale modeling and highlighting its application to the study of the biological mechanisms by which selected chemical weapon agents exert their effects at an atomic level.

  8. Evidence of VX nerve agent use from contaminated white mustard plants

    OpenAIRE

    Gravett, Matthew R.; Hopkins, Farrha B.; Self, Adam J.; Webb, Andrew J; Timperley, Christopher M.; Baker, Matthew J.

    2014-01-01

    The Chemical Weapons Convention prohibits the development, production, acquisition, stockpiling, retention, transfer or use of chemical weapons by Member States. Verification of compliance and investigations into allegations of use require accurate detection of chemical warfare agents (CWAs) and their degradation products. Detection of CWAs such as organophosphorus nerve agents in the environment relies mainly upon the analysis of soil. We now present a method for the detection of the nerve a...

  9. Simulant Agent Resistance Test Manikin (SMARTMAN) Testing of Protective Mask Systems

    Science.gov (United States)

    2013-09-16

    The staff will include emergency medical technicians ( EMTs ) qualified in advanced life support. 2.2 Instrumentation. Permissible error...warfare agent DA Department of the Army DTP detailed test plan EMT emergency medical technician FD/SC failure definition/scoring...Institute for Occupational Safety and Health NRT near real time NTA non-traditional agent TOP 08-2-109 16 September 2013 APPENDIX C

  10. Percutaneous radiofrequency thermal lumbar sympathectomy and its clinical use

    NARCIS (Netherlands)

    J. Pernak (Jamina)

    1988-01-01

    textabstractPercutaneous radiofrequency thermolesion techniques are commonly used in the treatment of chronic pain in different pain syndromes. There are many reports describing techniques of percutaneous radiofrequency thermolesion for denervation of central & spinal nerves (Mullan 1963), 1965,

  11. Percutaneous local therapies for hepatocellular carcinoma impair gastric function

    Institute of Scientific and Technical Information of China (English)

    Fumihiko Kinekawa; Shigeki Kuriyama; Kazuya Matsuda; Tsutomu Masaki; Kazutaka Kurokohchi; Hirohito Yoneyama; Hideyuki Inoue; Hirohide Kurata; Yoshihito Uchida; Seishiro Watanabe

    2006-01-01

    @@ TO THE EDITOR Percutaneous local therapies, such as percutaneous ethanol injection (PEI), microwave coagulation and radiofrequency ablation (RFA), are frequently used worldwide for the treatment of hepatocellular carcinoma (HCC) because of their high effectiveness.

  12. A novel approach to assessing percutaneous VX poisoning in the conscious guinea-pig.

    Science.gov (United States)

    Mumford, Helen; Price, Matthew E; Wetherell, Janet R

    2008-07-01

    Nerve agents like VX (S-2-diisopropylaminoethyl-O-ethyl-methylphosphonothiolate) are potent irreversible acetylcholinesterase (AChE) inhibitors. Following percutaneous nerve agent exposure there is a slower rate of absorption, later onset and longer duration of signs of poisoning. Relatively little is known about the physiological effects of percutaneously applied nerve agent in unanaesthetised laboratory animals. Heart rate (ECG), brain electrical activity (EEG), body temperature, locomotor activity and clinical signs were monitored following percutaneous application of VX to conscious guinea-pigs.A fall in heart rate (bradycardia) preceded incapacitation following the highest VX dose, and occurred in the absence of incapacitation at the lower doses. Following the highest dose of VX (0.592 mg kg(-1)) three out of four animals died within 24 h. The lower two doses of VX (0.296 and 0.148 mg kg(-1)), produced extended periods of bradycardia in the absence of observable signs of poisoning. Bradycardia preceded, or occurred in the absence of, a temperature decrease; seizure-like EEG changes were not observed at any of the VX doses tested. Acetylcholinesterase activity was significantly inhibited in the blood and most brain areas at 48 h. There were significant dose-related decreases in body weight at 24 and 48 h following VX. This preliminary study suggests that decreased heart rate may be an early sign of the toxic effects of VX, whereas temperature and observable clinical signs are not good early indicators of percutaneous VX poisoning in this animal model. Future studies will use this model to assess the benefit of administering medical countermeasures in response to a defined decrease in heart rate.

  13. Cybersecurity protecting critical infrastructures from cyber attack and cyber warfare

    CERN Document Server

    Johnson, Thomas A

    2015-01-01

    The World Economic Forum regards the threat of cyber attack as one of the top five global risks confronting nations of the world today. Cyber attacks are increasingly targeting the core functions of the economies in nations throughout the world. The threat to attack critical infrastructures, disrupt critical services, and induce a wide range of damage is becoming more difficult to defend against. Cybersecurity: Protecting Critical Infrastructures from Cyber Attack and Cyber Warfare examines the current cyber threat landscape and discusses the strategies being used by governments and corporatio

  14. [Percutaneous diagnostic angioscopy. Primary lesions].

    Science.gov (United States)

    Carlier, C; Foucart, H; Baudrillard, J C; Cécile, J P

    1993-01-01

    Efficacy of percutaneous treatments of arterial affections requires the correct choice of indications, necessitating precise knowledge of elementary arterial lesions. Arterial endoscopy appears to be more specific than angiography for this use, since it allows direct vision in vivo of the lesion, a histopathologic approach compared with the non univocal images produced by angiography (for example, an arterial obstruction can result from varied causes). Different accidents to the endothelial surface can be observed: golden yellow atheromatous elevations on a straw yellow background, intimal flaps, mobile intra-luminal vegetations. Established atheromatous stenosis are smooth and regular, or on the contrary ulcerated and edged with irregular flaps capable of provoking an eccentric residual lumen. The vegetating atheromatous lesions may project into the lumen, often as calcified and thus pearly white scales adhering to the wall, or as larger occlusive lesions. When capable of being isolated, a thrombus often completes the stenosis: its recognition is therefore fundamental since its removal exposes the subjacent lesions to be treated. The fresh clot is coral shaped, bright red and mobile in the blood flow. Established clots are compact and greenish brown. At an advanced stage of atheroma the surface of the occluding clot is covered with a regular straw yellow endothelium. In the presence of a dissecting vessel the fibroscope may be introduced into the false channel, no longer showing typical endothelium but a coagulated mass interspersed with fibrous bands. Prosthetic stenosis result from either intimal hyperplasia or a suturing fault with plication.

  15. Percutaneous biopsies: indications and techniques.

    Science.gov (United States)

    Bouic-Pagès, Emmanuelle; Perrochia, Hélène; Millet, Ingrid; Taourel, Patrice

    2012-02-01

    Breast inflammation is a difficult clinical problem as it can result from a variety of causes: specific or non-specific infectious mastitis, which may or may not be complicated, primary or secondary inflammatory mastitis or inflammatory cancer. The main objective of radiology is to eliminate an inflammatory cancer. Other objectives are to characterise an inflammatory condition (where the clinical context is valuable in guiding diagnosis but which often requires a micro- or macrobiopsy) or to obtain a microorganism in cases of complicated infectious mastitis (a diagnostic procedure but also comprising the first stage of treatment). Whether for bacteriological or histological purposes, percutaneous samples therefore play a large part in the diagnostic procedure, other than in the clinical context of pregnancy where mastitis is more easily diagnosed because of its frequency. The guidance method is usually ultrasound, and the needle chosen will depend on the radiological or ultrasound signal: puncture with an 18G needle will be used for a bacteriological sample, microbiopsy of a mass or lymph nodes, or macrobiopsy in the case of microcalcifications. Copyright © 2011 Éditions française de radiologie. Published by Elsevier Masson SAS. All rights reserved.

  16. Percutaneous nephrolithotomy for pediatric urolithiasis

    Directory of Open Access Journals (Sweden)

    Arvind P Ganpule

    2010-01-01

    Full Text Available Pediatric urolithiasis is a management dilemma as a number of treatment options are available such as shock wave lithotripsy (SWL, percutaneous nephrolithotomy (PCNL, and retrograde intrarenal surgery (RIRS. PCNL offers good clearance rates in a single hospital stay. The concerns with PCNL include the use of large instrument in pediatric kidneys, parenchymal damage and the associated effects on renal function, radiation exposure with fluoroscopy, and the risk of major complications including sepsis and bleeding. Evolution of pediatric PCNL technique such as miniaturization of instruments, limitation of tract size and advanced intracorporeal lithotripters have resulted in this technique being widely utilized for achieving stone-free status in appropriate patients. Many of the patients in our country come from remote areas thereby requiring special considerations during treatment. This also necessitates complete clearance in a single shorter hospital stay. PCNL appears to be the optimal option available in this scenario. The literature suggests that even complex and staghorn calculi can be tackled with this approach. The choice of the method to gain access is a matter of experience and personal preference. Ultrasound offers the advantage of visualization of spleen, liver and avoids injury. Miniaturization of instruments, particularly smaller nephroscopes and the potential to use lasers will decrease the morbidity and improve the clearance rates further. In this article, we analyze the management of pediatric urolithiasis with PCNL. We discuss our technique and analyze the results, complications and technique mentioned in the contemporary literature.

  17. Imaging in percutaneous musculoskeletal interventions

    Energy Technology Data Exchange (ETDEWEB)

    Gangi, Afshin; Guth, Stephane [University Hospital of Strasbourg, 67 (France). Dept. of Radiology B; Guermazi, Ali (eds.) [Boston Univ. School of Medicine, MA (United States). Dept. of Radiology

    2009-07-01

    This is one of the first books to deal specifically with imaging in percutaneous musculoskeletal interventions. The use of different imaging modalities during these procedures is well described. In the first chapter, the basic procedures and different guidance techniques are presented and discussed. The ensuing chapters describe in exhaustive detail the abilities and uses of imaging in guiding procedures ranging from biopsy and joint injection to management of pain and tumors. These procedures are extensively documented in adults as well as in the pediatric population. The third part of the book describes the different indications for vascular interventions in musculoskeletal lesions. The final chapter focuses on ultrasound-guided interventions, as they are more common and tend to be fashionable. The book is well illustrated with carefully chosen and technically excellent images. Each of the 18 chapters is written by an expert of international repute, making this book the most current and complete treatment of the subject available. It should be of great interest to interventional radiologists and also musculoskeletal and general radiologists. (orig.)

  18. Percutaneous isolated limb perfusion with thrombolytics for severe limb ischemia.

    Science.gov (United States)

    Ali, Ahsan T; Kalapatapu, Venkat R; Bledsoe, Shelly; Moursi, Mohammed M; Eidt, John F

    2005-01-01

    Patients with severe tibioperoneal disease are poor candidates for a distal bypass. Absence of a distal target, lack of conduit, or multiple medical problems can make these patients a prohibitive risk for revascularization. Acute on chronic ischemia in this group poses a greater challenge. Thrombolytic therapy for acute ischemia can be prolonged and carries a significant risk of bleeding if continued beyond 24 hours. However, if the ischemic limbs can be isolated from the systemic circulation, a higher dose of the lytic agent can be given with lower risk. These are the initial results of a series of 10 patients who underwent percutaneous isolated limb perfusion with a high dose of thrombolytics for severe ischemia. Ten patients (lower extremity 8 and upper extremity 2) presented with severe limb-threatening ischemia. Mean ankle/brachial index (ABI) was 0.15 for the lower extremity, and there were no recordable digital pressures in patients with upper extremity ischemia. No distal target was visible on the initial arteriogram. These patients were then taken to the operating room, and under anesthesia, catheters were placed in an antegrade fashion via femoral approach in the popliteal artery and vein percutaneously. For upper extremity, the catheters were placed in the brachial artery and vein. A proximal tourniquet was then applied. This isolated the limb from the systemic circulation. Heparinized saline was infused through the arterial catheter while the venous catheter was left open. A closed loop or an isolated limb perfusion was confirmed when effluent became clear coming out of the venous port. A high dose of thrombolytic agent (urokinase 500,000 to 1,000,000 U) was infused into the isolated limb via the arterial catheter and drained out of the venous catheter. After 45 minutes, arterial flow was reestablished. In 4 patients, Reopro((R)) was used in addition to thrombolytics. Postprocedure angiograms showed minimal changes, but patients exhibited marked

  19. [Current options for percutaneous endoscopic access to the digestive tract

    NARCIS (Netherlands)

    Romkens, T.E.H.; Jong, D.J. de; Kristinsson, J.O.; Wanten, G.J.A.

    2008-01-01

    Four patients, aged 67, 52, 56 and 64 years, respectively, undergoing percutaneous colostomy or jejunostomy are presented to illustrate current options for percutaneous endoscopic access to the digestive tract. The first patient had Parkinson's disease and required percutaneous jejunostomy for conti

  20. Percutaneous epidural drainage through a burr hole

    Directory of Open Access Journals (Sweden)

    Priscila M Falsarella

    2016-01-01

    Full Text Available Intracranial extradural collection may cause an increase in intracranial pressure, requiring rapid emergency treatment to reduce morbidity and mortality. We described an alternative CT-guided percutaneous access for extradural collection drainage. We report a case of a patient with previous craniectomy for meningioma ressection who presented to the Emergency Department with symptoms of intracranial hypertension. Brains CT showed a extradural collection with subfalcine herniation. After multidisciplinary discussion a CT-guided percutaneous drainage through previous burr hole was performed. The patient was discharged after 36 hours of admission, without further symptoms. We describe a safe and effective alternative percutaneous access for extradural collection drainage in patients with previous burr hole.

  1. Healthcare and warfare. Medical space, mission and apartheid in twentieth century northern Namibia.

    Science.gov (United States)

    Nord, Catharina

    2014-07-01

    In the year 1966, the first government hospital, Oshakati hospital, was inaugurated in northern South-West Africa. It was constructed by the apartheid regime of South Africa which was occupying the territory. Prior to this inauguration, Finnish missionaries had, for 65 years, provided healthcare to the indigenous people in a number of healthcare facilities of which Onandjokwe hospital was the most important. This article discusses these two agents' ideological standpoints. The same year, the war between the South-West African guerrillas and the South African state started, and continued up to 1988. The two hospitals became involved in the war; Oshakati hospital as a part of the South African war machinery, and Onandjokwe hospital as a 'terrorist hospital' in the eyes of the South Africans. The missionary Onandjokwe hospital was linked to the Lutheran church in South-West Africa, which became one of the main critics of the apartheid system early in the liberation war. Warfare and healthcare became intertwined with apartheid policies and aggression, materialised by healthcare provision based on strategic rationales rather than the people's healthcare needs. When the Namibian state took over a ruined healthcare system in 1990, the two hospitals were hubs in a healthcare landscape shaped by missionary ambitions, war and apartheid logic.

  2. Nanowire-based surface-enhanced Raman spectroscopy (SERS) for chemical warfare simulants

    Science.gov (United States)

    Hoffmann, J. A.; Miragliotta, J. A.; Wang, J.; Tyagi, P.; Maddanimath, T.; Gracias, D. H.; Papadakis, S. J.

    2012-06-01

    Hand-held instruments capable of spectroscopic identification of chemical warfare agents (CWA) would find extensive use in the field. Because CWA can be toxic at very low concentrations compared to typical background levels of commonly-used compounds (flame retardants, pesticides) that are chemically similar, spectroscopic measurements have the potential to reduce false alarms by distinguishing between dangerous and benign compounds. Unfortunately, most true spectroscopic instruments (infrared spectrometers, mass spectrometers, and gas chromatograph-mass spectrometers) are bench-top instruments. Surface-acoustic wave (SAW) sensors are commercially available in hand-held form, but rely on a handful of functionalized surfaces to achieve specificity. Here, we consider the potential for a hand-held device based on surface enhanced Raman scattering (SERS) using templated nanowires as enhancing substrates. We examine the magnitude of enhancement generated by the nanowires and the specificity achieved in measurements of a range of CWA simulants. We predict the ultimate sensitivity of a device based on a nanowire-based SERS core to be 1-2 orders of magnitude greater than a comparable SAW system, with a detection limit of approximately 0.01 mg m-3.

  3. China's Use of Cyber Warfare: Espionage Meets Strategic Deterrence

    Directory of Open Access Journals (Sweden)

    Magnus Hjortdal

    2011-01-01

    Full Text Available This article presents three reasons for states to use cyber warfare and shows that cyberspace is—and will continue to be—a decisive element in China's strategy to ascend in the international system. The three reasons are: deterrence through infiltration of critical infrastructure; military technological espionage to gain military knowledge; and industrial espionage to gain economic advantage. China has a greater interest in using cyberspace offensively than other actors, such as the United States, since it has more to gain from spying on and deterring the United States than the other way around. The article also documents China's progress in cyber warfare and shows how it works as an extension of its traditional strategic thinking and the current debate within the country. Several examples of cyber attacks traceable to China are also presented. This includes cyber intrusions on a nuclear arms laboratory, attacks on defense ministries (including the Joint Strike Fighter and an airbase and the U.S. electric grid, as well as the current Google affair, which has proved to be a small part of a broader attack that also targeted the U.S. Government. There are, however, certain constraints that qualify the image of China as an aggressive actor in cyberspace. Some believe that China itself is the victim of just as many attacks from other states. Furthermore, certain actors in the United States and the West have an interest in overestimating China's capabilities in cyberspace in order to maintain their budgets.

  4. Percutaneous Cryotherapy of Vascular Malformation: Initial Experience

    Energy Technology Data Exchange (ETDEWEB)

    Cornelis, F., E-mail: francoiscornelis@hotmail.com [Institut Bergonie, Department of Radiology (France); Neuville, A. [Institut Bergonie, Department of Pathology (France); Labreze, C. [Pellegrin Hospital, Department of Pediatric Dermatology (France); Kind, M. [Institut Bergonie, Department of Radiology (France); Bui, B. [Institut Bergonie, Department of Oncology (France); Midy, D. [Pellegrin Hospital, Department of Vascular Surgery (France); Palussiere, J. [Institut Bergonie, Department of Radiology (France); Grenier, N. [Pellegrin Hospital, Department of Radiology (France)

    2013-06-15

    The present report describes a case of percutaneous cryotherapy in a 36-year-old woman with a large and painful pectoral venous malformation. Cryoablation was performed in a single session for this 9-cm mass with 24 h hospitalisation. At 2- and 6-month follow-up, the pain had completely disappeared, and magnetic resonance imaging demonstrated a significant decrease in size. Percutaneous cryoablation shows promise as a feasible and apparently safe method for local control in patients with symptomatic venous vascular malformations.

  5. New developments in percutaneous stone surgery

    Directory of Open Access Journals (Sweden)

    S. Derisavifard

    2016-09-01

    Full Text Available Percutaneous stone surgery is the gold standard in removing large renal calculi. In light of the increase in prevalence and size of renal stones being addressed in recent years, numerous advances have been made in attempts of improving the morbidity, efficacy, and technical ease of stone clearance. In this review article, we assess new advancements in percutaneous stone surgery including diagnosis and surgical planning, methods of renal access, patient positioning, tract dilation, nephroscopes, lithotripsy, and post-operative drainage and antibiotic prophylaxis.

  6. Percutaneous tricuspid valve replacement in childhood

    Directory of Open Access Journals (Sweden)

    Mathias Emmel

    2015-01-01

    Full Text Available Percutaneous replacement of the tricuspid valve with a bovine jugular venous valve (melody valve was successfully undertaken in a 9-year-old boy. The patient had a previous history of bacterial endocarditis of the native tricuspid valve in infancy. Initially, a pericardial patch valve was created, followed by surgical replacement of the valve using a biological tissue valve at 4 years of age. Progressive stenosis and regurgitation of the biological valve, with severe venous congestion and resulting hepatic dysfunction prompted percutaneous valve replacement.

  7. Exit strategies following percutaneous nephrolithotomy (PCNL)

    DEFF Research Database (Denmark)

    Cormio, Luigi; Gonzalez, Gaspar Ibarlucea; Tolley, David

    2013-01-01

    PURPOSE: To compare the characteristics and outcomes of exit strategies following percutaneous nephrolithotomy (PCNL) using the Clinical Research Office of the Endourological Society (CROES) PCNL Global Study database. MATERIALS AND METHODS: Two matched data sets were prepared in order to compare...... stent only versus NT only and TTL versus NT only. Patients were matched on the exit strategy using the following variables: case volume of the center where they underwent PCNL, stone burden, the presence of staghorn stone, size of sheath used at percutaneous access, the presence of bleeding during...

  8. Percutaneous endoscopic gastrostomy in children

    Directory of Open Access Journals (Sweden)

    Jye Hae Park

    2011-01-01

    Full Text Available Purpose: Percutaneous endoscopic gastrostomy (PEG can improve nutritional status and reduce the amount of time needed to feed neurologically impaired children. We evaluated the characteristics, complications, and outcomes of neurologically impaired children treated with PEG. Methods: We retrospectively reviewed the records of 32 neurologically impaired children who underwent PEG between March 2002 and August 2008 at our medical center. Forty-two PEG procedures comprising 32 PEG insertions and 10 PEG exchanges, were performed. The mean follow-up time was 12.2 (6.6 months. Results: Mean patient age was 9.4 (4.5 years. The main indications for PEG insertion were swallowing difficulty with GI bleeding due to nasogastric tube placement and/or the presence of gastroesophageal reflux disease (GERD. The overall rate of complications was 47%, with early complications evident in 25% of patients and late complications in 22%. The late complications included one gastro-colic fistula, two cases of aggravated GERD, and four instances of wound infection. Among the 15 patients with histological evidence of GERD before PEG, 13 (87% had less severe GERD, experienced no new aspiration events, and showed increased body weight after PEG treatment. Conclusion: PEG is a safe, effective, and relatively simple technique affording long-term enteral nutritional support in neurologically impaired children. Following PEG treatment, the body weight of most patients increased and the levels of vomiting, GI bleeding, and aspiration fell. We suggest that PEG with post-procedural observation be considered for enteral nutritional support of neurologically impaired children.

  9. Narrowing the zone of uncertainty between research and development in biological warfare defense.

    Science.gov (United States)

    Huxsoll, D L

    1992-12-31

    Although "research" is not prohibited by the Biological Weapons Convention, States Parties to the Convention have maintained the spirit of the Convention in actions relating to research. The confidence-building measures agreed to at RC2 refer to research facilities, publication of research results, and promotion of contacts between scientists engaged in research related to the Convention. However, assessment of basic research on biological agents is not a productive way to distinguish an offensive from a defensive program. Additionally, if a country were to initiate a biological weapons program, basic research on biological agents may not be necessary. For example, the extensive published research on Bacillus anthracis, both as a cause of anthrax in cattle and other species and as a biological-warfare agent, would enable any motivated group or nation to initiate a biological weapons program that could immediately advance to the development and scale-up stages. Research on biological agents for offensive purposes would be characterized by activities such as selection for growth, virulence, and toxin production; improving stability under varying environmental conditions; and selection of strains that might overcome existing means of prophylaxis and treatment. A biological program with an offensive intent would in most cases be characterized by evidence of development efforts in mass production and dissemination, which are often agent-specific. Thus, an assessment of development may distinguish offensive from defensive programs. If a country were to initiate a biological weapons research program, and were willing to risk worldwide condemnation should existence of such a program become known, it is likely that such a program would include development and production capabilities. If a country were not committed to production capability, there would be no rationale for an offensive biological research that would bring worldwide condemnation. Critics of the U

  10. Chemical Warfare Materiel in Sediment at a Deep-Water Discarded Military Munitions Site

    Science.gov (United States)

    Briggs, C. W.; Bissonnette, M. C.; Edwards, M.; Shjegstad, S. M.

    2016-12-01

    Understanding the release and transformation of chemical agent (CA) at underwater discarded military munitions (DMM) sites is essential to determine the potential risk to human health and impact on the ocean environment; yet few studies have been conducted at sites in excess of 250 m, the depth at which most U.S. CA munitions were disposed. Maritime construction workers installing cables or pipelines at a CA DMM site, as well as fishermen and scientific researchers deploying bottom-contact gear, represent possible exposure pathways to human receptors. The Hawai`i Undersea Military Munitions Assessment (HUMMA) sought to characterize a historic munitions sea-disposal site at depths between 400-650 m. During the 2014 HUMMA Sampling Survey, the Jason 2 remotely operated vehicle was used to collect sediments within two meters of suspected World War II chemical munitions, confirmed to be 100-lb M47 series bombs containing sulfur mustard. When environmental media was brought to the surface, samples were screened for distilled sulfur mustard (HD) and related agent breakdown products (ABP) (collectively referred to as chemical warfare materiel [CWM]). Detectable concentrations of HD and/or its ABP 1,4-dithiane were found in sediments collected at all CA DMM sites; HD was also detected at two control sites. The location and extent of munitions casing deterioration strongly influenced the distribution and level of CWM in sediment. The interior of the casing contained levels of CWM orders of magnitudes higher than that observed in the surrounding sediment at one meter distance, indicating the majority of the CWM is hydrolyzed as it is released from the munitions casing and a fraction of the fill materiel persists in the environment for decades following disposal. Although the potential for future site users to become exposed to CWA in recovered sediments and debris exists, the level of risk is significantly mitigated by the depth and location of the sea-disposal site.

  11. Percutaneous needle fasciotomy in dupuytren's disease

    NARCIS (Netherlands)

    van Rijssen, A L; Werker, P M N

    2006-01-01

    The aim of this study was to examine our results of 74 percutaneous needle fasciotomies for Dupuytren's contracture. Pre-operative and postoperative total passive extension deficit was measured. Patients were seen at the outpatient clinic at 32 months for final follow-up. Extension deficit and

  12. Percutaneous penetration studies for risk assessment

    NARCIS (Netherlands)

    Sartorelli, P.; Andersen, H.R.; Angerer, J.; Corish, J.; Drexler, H.; Göen, T.; Griffin, P.; Hotchkiss, S.A.M.; Larese, F.; Montomoli, L.; Perkins, J.; Schmelz, M.; Sandt, J. van de; Williams, F.

    2000-01-01

    During the last few years the general interest in the percutaneous absorption of chemicals has increased. It is generally accepted that there is very few reliable quantitative and qualitative data on dermal exposure to chemicals in the general population and in occupationally exposed workers. In ord

  13. Imaging in percutaneous ablation for atrial fibrillation

    NARCIS (Netherlands)

    R. Maksimović (Ružica); T. Dill (Thorsten); A.D. Ristić (Arsen); P.M. Seferovic (Petar)

    2006-01-01

    textabstractPercutaneous ablation for electrical disconnection of the arrhythmogenic foci using various forms of energy has become a well-established technique for treating atrial fibrillation (AF). Success rate in preventing recurrence of AF episodes is high although associated with a significant

  14. New developments in percutaneous stone surgery

    African Journals Online (AJOL)

    S. Derisavifard

    2016-08-01

    Aug 1, 2016 ... Percutaneous stone surgery is the gold standard in removing large renal calculi. In light of the .... tailoring antibiotics if a patient were to develop sepsis. ..... small size of the micro-PCNL instrumentation, it is best suited for.

  15. Improvements in Intracorporeal Lithotripters for Percutaneous Nephrolithotomy

    Science.gov (United States)

    Kuo, Ramsay L.

    2007-04-01

    Percutaneous nephrolithotomy (PNL) is an effective minimally invasive surgical approach for the treatment of large renal stone burden. Intracorporeal lithotripters (ICL) are utilized during PNL to fragment calculi, with some devices capable of concurrently removing fragments as well. Much progress has been made in the design of ICL devices, resulting in potentially more efficient treatment of nephrolithiasis.

  16. Gastrostomie percutanée endoscopique

    National Research Council Canada - National Science Library

    Le Sidaner, Anne

    2002-01-01

    La gastrostomie percutanée endoscopique est actuellement la voie d’abord de référence pour l’alimentation entérale prolongée. La simplicité et la rapidité de la technique, l’évolution du matériel font que les gastro...

  17. Magnetic Navigation in Percutaneous Cardiac Intervention

    NARCIS (Netherlands)

    M.S. Patterson (Mark)

    2010-01-01

    textabstractMagnetic navigation is the use of a magnetic fi eld to re-orientate a magnetically-enabled wire or device. The fi eld is directed by external magnets that are moved by a computercontrolled system. This technology could improve percutaneous coronary interventional procedures as it

  18. Appropriateness of Percutaneous Coronary Intervention

    Science.gov (United States)

    Chan, Paul S.; Patel, Manesh R.; Klein, Lloyd W.; Krone, Ronald J.; Dehmer, Gregory J.; Kennedy, Kevin; Nallamothu, Brahmajee K.; Douglas Weaver, W.; Masoudi, Frederick A.; Rumsfeld, John S.; Brindis, Ralph G.; Spertus, John A.

    2012-01-01

    Context Despite the widespread use of percutaneous coronary intervention (PCI), the appropriateness of these procedures in contemporary practice is unknown. Objective To assess the appropriateness of PCI in the United States. Design, Setting, and Patients Multicenter, prospective study of patients within the National Cardiovascular Data Registry undergoing PCI between July 1, 2009, and September 30, 2010, at 1091 US hospitals. The appropriateness of PCI was adjudicated using the appropriate use criteria for coronary revascularization. Results were stratified by whether the procedure was performed for an acute (ST-segment elevation myocardial infarction, non–ST-segment elevation myocardial infarction, or unstable angina with high-risk features) or nonacute indication. Main Outcome Measures Proportion of acute and nonacute PCIs classified as appropriate, uncertain, or inappropriate; extent of hospital-level variation in inappropriate procedures. Results Of 500 154 PCIs, 355 417 (71.1%) were for acute indications (ST-segment elevation myocardial infarction, 103 245 [20.6%]; non–ST-segment elevation myocardial infarction, 105 708 [21.1%]; high-risk unstable angina, 146 464 [29.3%]), and 144 737 (28.9%) for nonacute indications. For acute indications, 350 469 PCIs (98.6%) were classified as appropriate, 1055 (0.3%) as uncertain, and 3893 (1.1%) as inappropriate. For nonacute indications, 72 911 PCIs (50.4%) were classified as appropriate, 54 988 (38.0%) as uncertain, and 16 838 (11.6%) as inappropriate. The majority of inappropriate PCIs for nonacute indications were performed in patients with no angina (53.8%), low-risk ischemia on noninvasive stress testing (71.6%), or suboptimal (≤1 medication) antianginal therapy (95.8%). Furthermore, although variation in the proportion of inappropriate PCI across hospitals was minimal for acute procedures, there was substantial hospital variation for nonacute procedures (median hospital rate for inappropriate PCI, 10

  19. The Third World War? In The Cyberspace. Cyber Warfare in the Middle East.

    Directory of Open Access Journals (Sweden)

    Martina

    2014-06-01

    Full Text Available This article aims to provide a brief and comprehensive introduction to the issue of cyber warfare and to display the recent development in this area. Geographically, it focuses on the Middle East region, since the vast majority of the most important recent cyber attacks appeared just in there or were connected to it. The first part of the article tries to define the key notion of cyber warfare, compares it to the standard warfare and presents different types of cyber weapons that are known today. The second part points out examples of the most striking recent cyber attacks and uses them as evidences to demonstrate today's importance and dissemination of cyber warfare. Finally, the article sums up pros and cons of the cyber weapons and, in view of these, predicts a significant increase in their use in any future war conflicts.

  20. Optimizing Armed Forces Capabilities for Hybrid Warfare – New Challenge for Slovak Armed Forces

    Directory of Open Access Journals (Sweden)

    Peter PINDJÁK

    2015-09-01

    Full Text Available The paper deals with the optimization of military capabilities of the Slovak Armed Forces for conducting operations in a hybrid conflict, which represents one of the possible scenarios of irregular warfare. Whereas in the regular warfare adversaries intend to eliminate the centers of gravity of each other, most often command and control structures, in irregular conflicts, the center of gravity shifts towards the will and cognitive perception of the target population. Hybrid warfare comprises a thoroughly planned combination of conventional military approaches and kinetic operations with subversive, irregular activities, including information and cyber operations. These efforts are often accompanied by intensified activities of intelligence services, special operation forces, and even mercenary and other paramilitary groups. The development of irregular warfare capabilities within the Slovak Armed Forces will require a progressive transformation process that may turn the armed forces into a modern and adaptable element of power, capable of deployment in national and international crisis management operations.

  1. Changing the face of cyber warfare with international cyber defense collaboration

    CSIR Research Space (South Africa)

    Grobler, M

    2011-03-01

    Full Text Available of the Government, as well as cyber security and cyber warfare acts and the command and control aspects thereof. The research presented is largely theoretical in nature, focusing on recent events in the public international domain....

  2. A Review of Chemical Warfare Agent (CWA) Detector Technologies and Commercial-Off-The-Shelf Items

    Science.gov (United States)

    2009-03-01

    lithium thionyl chloride batteries74 Battery , external power supply of rechargeable battery78 110 (+/-10%) VAC 50/60 Hz or 600 watts77. Operational Life...dioxide battery or 12V power supply6, 39, 40 6 standard ‘C’ alkaline batteries44 Rechargeable lithium -ion battery46 Rechargeable lithium - ion... battery pack51 Lithium manganese dioxide batteries or power supply56 Lithium -sulfur dioxide battery ,

  3. A Survey and Evaluation of Chemical Warfare Agent-Decontaminants and Decontamination

    Science.gov (United States)

    1984-10-15

    Miscellaneous Oxidants--Perchloryl fluoride (C10 3 F ) and dinitro- gen tetroxide (N20 4 ) were developed and tested (31); results indicated that none of...H. * Potassium peroxydisulfate--This compound combined with a silver ion catalyst has been suggested for the decomposition of V, but experimental work...tetramethylethylenedlamine (TMEDA) is 1.0 minute at pH 7.0. Although several diamine - Cu (II) complexes including di-u-dihydroxo-bis-(N, N,N’,N’-tetraethyl

  4. Ram-air sample collection device for a chemical warfare agent sensor

    Science.gov (United States)

    Megerle, Clifford A.; Adkins, Douglas R.; Frye-Mason, Gregory C.

    2002-01-01

    In a surface acoustic wave sensor mounted within a body, the sensor having a surface acoustic wave array detector and a micro-fabricated sample preconcentrator exposed on a surface of the body, an apparatus for collecting air for the sensor, comprising a housing operatively arranged to mount atop the body, the housing including a multi-stage channel having an inlet and an outlet, the channel having a first stage having a first height and width proximate the inlet, a second stage having a second lower height and width proximate the micro-fabricated sample preconcentrator, a third stage having a still lower third height and width proximate the surface acoustic wave array detector, and a fourth stage having a fourth height and width proximate the outlet, where the fourth height and width are substantially the same as the first height and width.

  5. The Utility of Freedom: A Principal-Agent Model for Unconventional Warfare

    Science.gov (United States)

    2011-06-01

    1st ed. (Berkeley, CA: University of California Press, 2009); Melvyn C. Goldstein, The Snow Lion and the Dragon: China, Tibet, and the Dalai Lama ...and equipment to the rebel fighters. This phase ends in March of 1959, with the escape of the Dalai Lama to exile in India.50 The second phase...ends in 1974 when the Dalai Lama ordered the remaining resistance members to lay down their arms and take up the ―long term approach‖ to the Tibetan

  6. Evaluation of Animal and Plant Pathogens as Terrorism and Warfare Agents, Vectors and Pests

    Science.gov (United States)

    2001-09-01

    Acari Arachnida Hyalomma Anatolicumn Anatolicumn Dermacentor andersoni Acari Arachnida Dermacentor varabilis Amblyimma Cajennese Rhipicephalus sanguineus...Mansonia spp. Diptera Insecta Culex spp. Culiseta spp. Pediculus humanus Anopluraa Insect Ixodides Dermacentor spp. Acari Arachnida Rhipicephalus spp

  7. Methyl Salicylate: A Reactive Chemical Warfare Agent Surrogate to Detect Reaction with Hypochlorite (POSTPRINT)

    Science.gov (United States)

    2011-05-01

    acid (Fisher Scientific, Fair Lawn, NJ) was diluted to 1.0 M in water purified by reverse osmosis . Methods. Reactions were initially examined by...reactivity of hypochlorite neutralizants delivered onto a substrate is strongly diffusion limited, an observation likely to be useful as a

  8. In Situ Studies of the Decomposition of Simulated Chemical Warfare Agents on Nanoparticle Catalysts

    Science.gov (United States)

    2009-10-04

    insufficient energy for interdiffusion of Rh into bulk Pt surfaces.9,24,25 In addition, Monte Carlo simulations of a 1000-atom Au(50%)-Pt(50...12949. (22) Hernandez-Fernandez, P.; Rojas, S.; Ocon, P.; de la Fuente , J. L. G.; Fabian, J. S.; Sanza, J.; Pena, M. A.; Garcia-Garcia, F. J

  9. Five-Year Follow-Up of Army Personnel Potentially Exposed to Chemical Warfare Agents

    Science.gov (United States)

    2005-12-01

    21.3 0.93 (0.83-1.04) Neuralgia or neuritis 6.8 6.4 1.05 (0.85-1.30) Any disease of genital organs 6.3 6.6 0.94 (0.76-1.17) Heart disease 1.8 1.8 0.98...Recurrent headaches 46.8 42.0 0.20 Ž:7 14.1 12.8 Migraines 19.0 20.3 0.66 Not answered - - 0.45 Neuralgia or neuritis 6.2 7.5 0.50 Hospitalizations...other cancer, tunity to look at the possible effects of notification on health. The recurrent headache, and neuralgia . Only recurrent headache fact that

  10. Biosensor-Based Detection and Verification System for Bio-Chemical Warfare Agents

    Science.gov (United States)

    2007-11-02

    23 The second alternative detection scheme is gated integration (GI). In GI, the photocurrent from the LAPS is collected on a feedback capacitor ...magnitude of the internal photovoltage can be estimated by dividing the charge output form the LAPS by the magnitude of the insulator capacitor . For the case...uI184eiG)u3 C fousJiojdosi Ioqoeqie3 0. loqia)e 00 Lf ; CJ CS (9s~e~jou */) asuodseU (Silicone) (.002’ Polyester )I I Ir ScreenI (PeCap 7-88/34)I I (.012 "x

  11. Chemical Warfare Agent Surface Adsorption: Hydrogen Bonding of Sarin and Soman to Amorphous Silica

    Science.gov (United States)

    2014-03-17

    small transfer chamber located within the confines of a CWA-certified surety fume hood . Within the main chamber, the sample was mounted on a molybdenum...Particulate silica surface samples were prepared by dispersing silica (200 m2/g, Aerosil fumed silica with a 12 nm average particle diameter) from a

  12. Detection of Biological Warfare Agents in Municipal Tap Water via Standardized Culture Methods

    Science.gov (United States)

    2010-06-01

    0.001 % v/v Tween 80 (Fisher T164). All solutions were prepared in distilled water and filter sterilized. NaPP was made fresh daily, while the sodium...thiosulfate and Tween 80 solutions were stored for no longer than one week at 4 °C. The ultrafiltration apparatus (see Figure) was assembled after...filtration period. When filtration of the 100 L was complete, 150 mL of 0.001 % Tween 80 was aspirated into the filter as a "forward rinse" through the

  13. Chemical Warfare Agent Operational Exposure Hazard Assessment Research: FY07 Report and Analysis

    Science.gov (United States)

    2010-07-01

    accidentally exposed to VX vapor. The method employs GC-MS/MS on a triple quadrupole mass spectrometer using stable isotope dilution for quantitation... Technique for Assessing Exposure to VX via GC-MS/MS Analysis 85 3.3.1 Introduction 85 3.3.2 Materials and Methods 85 3.3.3 Results and Discussion 90...guinea pigs were anesthetized using isoflurane (3% induction, 15-2% maintenance; with oxygen). All procedures were performed using aseptic technique

  14. An Evaluation of Bioregulators/Modulators as Terrorism and Warfare Agents

    Science.gov (United States)

    2003-07-01

    brain should have receptor sites for alkaloids from the opium poppy led to the discovery of a family of natural painkillers , the endorphins (from...traced in human body. In each case a clandestine application of such substances can lead to death - "killing without a trace". Although the use of...the possibility for direct delivery of toxin or bioregulator to the human target or they could be used to transfer the toxin or bioregulator genes to

  15. Photoassisted reaction of chemical warfare agent VX droplets under UV light irradiation.

    Science.gov (United States)

    Zuo, Guo-Min; Cheng, Zhen-Xing; Li, Guo-Wen; Wang, Lian-Yuan; Chen, Hong

    2005-08-11

    A photoassisted reaction of O-ethyl S-[2-(diisopropylamino) ethyl] methylphosphonothioate (VX) droplets in air was carried out. The experimental results indicated that VX droplets could be easily and chemically transformed into other compounds under irradiation of a germicidal lamp over sufficient time. Quantum chemical calculation results demonstrated that UV light less than 278 nm wavelength could possibly initiate photoreaction of VX and that both P-S and P=O bonds in the VX molecule were lengthened. The identification of reaction products by gas and liquid chromatography mass spectroscopy and NMR revealed that the VX molecule in air under UV light irradiation could undergo isomerization of S-esters to O-esters, cleavage of P-S, S-C, and C-N bonds, and ozonation of tertiary amines.

  16. Oxidative degradation of chemical warfare agents in water by bleaching powder.

    Science.gov (United States)

    Qi, Lihong; Zuo, Guomin; Cheng, Zhenxing; Zhu, Haiyan; Li, Shanmao

    2012-01-01

    Degradation of sulfur mustard (HD), S-2-(di-isopropylamino)ethyl O-ethyl methylphosphonothioate (VX) and Soman (GD) in water by bleaching powder was investigated. The degradation products were comprehensively analyzed by gas chromatography/mass spectrometry (GC/MS), liquid chromatography/mass spectrometry (LC/MS) and ion chromatography. Degradation pathways were deduced based on the identified products. The product analysis results indicated that HD could be degraded through oxidation and chlorination reactions, and a small portion of sulfur atoms could be mineralized into SO(4)(2-) ion. Oxidative degradation of VX could finally generate O-ethyl methylphosphonate acid (EMPA), sulfonic acids, SO(4)(2-) and NO(3)(-) ions. GD would be converted into non-toxic pinacolyl methylphosphonate via nucleophilic substitution.

  17. Distinct human antibody response to the biological warfare agent Burkholderia mallei.

    Science.gov (United States)

    Varga, John J; Vigil, Adam; DeShazer, David; Waag, David M; Felgner, Philip; Goldberg, Joanna B

    2012-10-01

    The genetic similarity between Burkholderia mallei (glanders) and Burkholderia pseudomallei (melioidosis) had led to the general assumption that pathogenesis of each bacterium would be similar. In 2000, the first human case of glanders in North America since 1945 was reported in a microbiology laboratory worker. Leveraging the availability of pre-exposure sera for this individual and employing the same well-characterized protein array platform that has been previously used to study a large cohort of melioidosis patients in southeast Asia, we describe the antibody response in a human with glanders. Analysis of 156 peptides present on the array revealed antibodies against 17 peptides with a > 2-fold increase in this infection. Unexpectedly, when the glanders data were compared with a previous data set from B. pseudomallei infections, there were only two highly increased antibodies shared between these two infections. These findings have implications in the diagnosis and treatment of B. mallei and B. pseudomallei infections.

  18. Using Agent Based Distillation to Explore Issues Related to Asymmetric Warfare

    Science.gov (United States)

    2009-10-01

    ONERA -CT/DTIM/SER 2 Avenue E. Belin 31055 Toulouse Cedex France Martin.Adelantado@onera.fr, Jean-Michel.Mathe@onera.fr ABSTRACT In this paper...PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) ONERA -CT/DTIM/SER 2 Avenue E. Belin 31055 Toulouse Cedex France 8. PERFORMING ORGANIZATION REPORT

  19. Computational Enzymology and Organophosphorus Degrading Enzymes: Promising Approaches Toward Remediation Technologies of Warfare Agents and Pesticides.

    Science.gov (United States)

    Ramalho, Teodorico C; de Castro, Alexandre A; Silva, Daniela R; Silva, Maria Cristina; Franca, Tanos C C; Bennion, Brian J; Kuca, Kamil

    2016-01-01

    The re-emergence of chemical weapons as a global threat in hands of terrorist groups, together with an increasing number of pesticides intoxications and environmental contaminations worldwide, has called the attention of the scientific community for the need of improvement in the technologies for detoxification of organophosphorus (OP) compounds. A compelling strategy is the use of bioremediation by enzymes that are able to hydrolyze these molecules to harmless chemical species. Several enzymes have been studied and engineered for this purpose. However, their mechanisms of action are not well understood. Theoretical investigations may help elucidate important aspects of these mechanisms and help in the development of more efficient bio-remediators. In this review, we point out the major contributions of computational methodologies applied to enzyme based detoxification of OPs. Furthermore, we highlight the use of PTE, PON, DFP, and BuChE as enzymes used in OP detoxification process and how computational tools such as molecular docking, molecular dynamics simulations and combined quantum mechanical/molecular mechanics have and will continue to contribute to this very important area of research.

  20. Prolonged Inhibition of Motor Activity Following Repeated Exposure to Low Levels of Chemical Warfare Agent VX

    Science.gov (United States)

    2005-10-01

    Anxious mice tend to avoid the brightly lit center of the maze, and display thigmotaxis (wall following), in which they closely walk along the...analysis of the mouse open field test: effects of diazepam , chlordiazepoxide and an extremely low frequency pulsed magnetic field, Neurosci Biobehav

  1. Bio Warfare and Terrorism: Toxins and Other Mid-Spectrum Agents

    Science.gov (United States)

    2005-01-01

    bacteria or fungi or weaken nium salts), nonionic (e.g., alkyl polyglycosides, the cell walls so that they are more susceptible to alcohol ethoxylates ...alkylphenol ethoxylates ), and other classes of biocides (see below). Sodium zwitterionic.

  2. Surface with two paint strips for detection and warning of chemical warfare and radiological agents

    Science.gov (United States)

    Farmer, Joseph C.

    2013-04-02

    A system for warning of corrosion, chemical, or radiological substances. The system comprises painting a surface with a paint or coating that includes an indicator material and monitoring the surface for indications of the corrosion, chemical, or radiological substances.

  3. Comparative Analysis of Two Biological Warfare Air Samplers Using Live Surrogate Agents

    Science.gov (United States)

    2012-03-01

    bacteriophage. First, a 1L sterile Nalgene® bottle was used then 20 mL of MS2 fitrate (3 x 109) was mixed with 500 mL of Luria -Bertani broth media...broth CFU colony-forming units IPA isopropyl alcohol LBA luria -bertani agar LBB luria -bertani broth PBS phosphate buffer saline PFU

  4. Improving Blood Monitoring of Enzymes as Biomarkers of Risk from Anticholinergic Pesticides and Chemical Warfare Agents

    Science.gov (United States)

    2007-10-01

    One approach would be to use the colorimetric two substrate ( diazinon -oxon and paraoxon) PON1 assay (Richter, et al., 2004, Costa, et al., 2005a...and, its limited usefulness as a test of liver function. J Lab Clin Med 40:692–702. Harris, E.K. (1974). Effects of intra- and interindividual varia...Vorhaus, L.J., II, Scudamore, H.H., Kark, R.M. (1950). Measurement of serum cholinesterase activty in the study of disease of the liver and biliary

  5. Advances in Biotechnology and Genetic Engineering: Implications for the Development of New Biological Warfare Agents

    Science.gov (United States)

    1996-06-01

    fever •= Cholera •= Ricin •= Clostridium perfringens •= Shigella •= Encephalomyelitis viruses •= Smallpox •= Glanders •= Tularemia •= Hemorrhagic... transgenic animals by transferring genes from other animals into mice. 1981 Mary Harper and two colleagues mapped the gene for insulin. That year...GenPharm International, Inc. created the first transgenic dairy cow. The cow was used to produce human milk proteins for infant formula. 1990 A four

  6. Biodegradation of an Organophosphate Chemical Warfare Agent Simulant by Activated Sludge with Varying Solid Retention Times

    Science.gov (United States)

    2013-03-21

    0.72 g Na3NTA * 2H2O , 0.3 g Na3EDTA * 4H2O, 3.0 g FeCl3 * 6H2O, 0.5 g H3BO3, 0.3 g ZnSO4 * 7H2O, 0.24 g MnCl2 * 4H2O, 0.14 g CuSO4 * 5H2O, 0.06 g KI...through reactions shown in equations 2-4. 12 NH3 + O2 + 2e - +2H + - -> NH2OH + H2O (2) NH2OH + H2O + 1/2 O2--> NO 2- + 2H2O + H + (3...1.25 g NaCH3COO, 2.26 g NH4Cl, 6.86 g MgCl2 * 6H2O, 1.72 g CaCl2 * 2H2O , 0.6675 g KH2PO4 and 20 mL of a trace element solution adapted from

  7. A Review of the Disruptive Potential of Botulinum Neurotoxins as Chemical Warfare Agents

    Science.gov (United States)

    2011-10-01

    dangerous chemical weapon (persistence in vivo, exceedingly high potency, ease of distribution and ease of production) also make it highly...caused by ingestion of botulinum neurotoxin (BoNT) was first described as “ sausage poisoning” in 1820 and attributed to a bacterium in 1897 [1]. We...intoxication of susceptible hosts invariably results in neuromuscular paralysis. The same characteristics that make the BoNTs the most lethal substances

  8. Marital Relationship and Its Associated Factors in Veterans Exposed to High Dose Chemical Warfare Agents

    Directory of Open Access Journals (Sweden)

    Shervin Assari

    2008-06-01

    Full Text Available Objective: The aim of this study was to determine the associates of marital relationship in mustard exposed veterans.Materials and Methods: Two hundred ninety two married Iranian mustard exposed veterans, who had been exposed to single high dose mustard gas in Iraq-Iran war, were assessed for marital adjustment with Revised Dyadic Adjustment Scale (RDAS. Census sampling was done. The patients' quality of life (SF-36, spirometric measures and war related data were also extracted.Results: A total of 189 subjects (65% completed our study. The mean (±SD of the RDAS Total score, RDAS Dyadic Consensus , RDAS Affectional Expression, RDAS Dyadic Satisfaction , and RDAS Dyadic Cohesion were 50.61 (8.16, 16.67 (2.77, 7.62 (1.84, 14.76 (3.39, and 11.54 (3.79, respectively. RDAS Dyadic satisfaction was correlated with SF-36 and all its sub-scores (p<0.05. RDAS total score showed significant correlation with SF-36 total score and most of its sub-scores (p<0.05. RDAS affective expression was significantly correlated with role limitation, social function, general mental health, vitality, General health perceptions, physical composite score (PCS and mental composite score (MCS (p<0.05. RDAS dyadic consensus was not correlated with any SF-36 sub-scores.Conclusion: Veterans health team including physicians, psychologists and/or psychiatrists should know that poorer marital satisfaction is linked with lower quality of life scores, late after mustard exposure, although marital relationship is independent of spirometric findings, age, duration from exposure and comorbidity score.

  9. Chiral Separation of G-type Chemical Warfare Nerve Agents via Analytical Seupercritical Fluid Chromatography

    Science.gov (United States)

    2014-01-01

    by HPLC have not been well characterized . Supercritical fluid chromatography (SFC) is a well- established chiral chromatography technology that offers...smoothed chromatograms. For presentation purposes only smoothed chromatograms are shown. Chromatographic Characterization Chromatography parameters were...under these conditions (data not shown). Various other polysaccharide -type chiral columns (Chiralpak AD-H, Chiralcel OJ-RH, Chiralpak IB) were tested

  10. A Better State of War: Surmounting the Ethical Cliff in Cyber Warfare

    Science.gov (United States)

    2014-06-01

    Unlike landmines, for example, that litter historical battlefields to this day, cyber weapons offer a more hygienic approach to warfare. In...institutions have protected civilians from harm through established regulations and norms ranging from merchant shipping protection under the law of...targeted the Laconia, a merchant vessel, in 1942.80 Citizens engaged in cyber warfare, however, may be targeted with commensurate cyber weapons

  11. Electronic Warfare: Rethinking the Importance of Its Role In Military Operations

    Science.gov (United States)

    2016-06-10

    EW mindset changes. 15. SUBJECT TERMS Electronic Warfare, Vulnerability, Military, Threat , Technology, Technological 16. SECURITY...Signature: Kevin nernen, C USAF Corn i e Signatu P er e, , C Directo JointA ancedWarfighting Signature: 10 June 2016 Thesis Advisor: Approved by: School...Electronic warfare support actions taken to identify, locate sources of energy emitted by enemy systems for the purpose of providing threat warning

  12. Understanding the elementary considerations in a network warfare environment: an introductory framework

    CSIR Research Space (South Africa)

    Veerasamy, N

    2008-07-01

    Full Text Available framework. 5.1 Constrains and Implications Several factors can constrain network warfare and have associated consequences. These include the legal issues, ethical dilemmas, technical solutions, financial impact and skill/manpower investment. Logical... the personality traits of an individual. Users will need to balance ethical dilemmas before engaging in offensive network warfare. Computers and network are powerful tools and great harm can be caused with them. Motive, attitude, values, upbringing, experience...

  13. ‘Lest we forget’*: a veteran and son share a ‘warfare tourism’ experience

    OpenAIRE

    Fallon, Paul; Robinson, Peter

    2016-01-01

    Warfare tourism’ represents an increasingly significant dimension of contemporary tourism. This paper provides a fresh perspective on participation in ‘warfare tourism’ by investigating the behaviour and experiences of a living veteran and his son returning to two theatres of war in which the veteran had served in the Royal Navy during the Second World War. Active interviews with the two family members were used to gather rich data regarding the two extended trips, which had been funded by ‘H...

  14. Defesa química: histórico, classificação dos agentes de guerra e ação dos neurotóxicos

    Directory of Open Access Journals (Sweden)

    Gustavo Rocha Silva

    2012-01-01

    Full Text Available Chemical agents are substances used for their toxic effects on humans, animals and plants. The main objective of chemical defense is to develop systems that reduce these effects while minimizing impact on the operational capacity of military troops. In this work, a report on the development of chemical warfare agents since the First World War and their classification is presented. Special attention is given to neurotoxic agents, the most lethal group of chemical agents known to date.

  15. Agroterrorism, Biological Crimes, and Biological Warfare Targeting Animal Agriculture

    Energy Technology Data Exchange (ETDEWEB)

    Wilson, Terry M.; Logan-Henfrey, Linda; Weller, Richard E.; Kellman, Brian

    2000-04-12

    There is a rising level of concern that agriculture might be targeted for economic sabotage by terrorists. Knowledge gathered about the Soviet Union biological weapons program and Iraq following the Gulf War, confirmed that animals and agricultural crops were targets of bioweapon development. These revelations are particularly disturbing in light of the fact that both countries are States Parties to the Biological and Toxin Weapons Convention that entered into force in 1975. The potential for misusing biotechnology to create more virulent pathogens and the lack of international means to detect unethical uses of new technologies to create destructive bioweapons is of increasing concern. Disease outbreaks, whether naturally occurring or intentionally, involving agricultural pathogens that destroy livestock and crops would have a profound impact on a country's infrastructure, economy and export markets. This chapter deals with the history of agroterrorism, biological crimes and biological warfare directed toward animal agriculture, specifically, horses, cattle, swine, sheep, goats, and poultry.

  16. RELATIONAL APPROACHES REGARDING FOCUSED LOGISTICS IN MODERN WARFARE JOINT OPERATIONS

    Directory of Open Access Journals (Sweden)

    Gheorghe MINCULETE

    2015-10-01

    Full Text Available The military joint operations of the future are characterized by large concentrations of forces and conventional means on the directions that permit the exploitation of the technological superiority and the manifestation of the offensive spirit of the commanders of the joint operation force groups. Having in mind the fact that the relation between the combatant forces and the logistic ones will shift more and more in favour of the latter, the aforementioned operations will be usually supported by modern flexible logistic structures. The constituted force groups will have a significant joint force character, ensuring superior quality of the troops’ combat training, both at individual level and collective level of units and large units. The current article presents innovative aspects of focused logistics, adapted for the modern warfare, which should be designed and achieved in order to increase the operational potential of the joint force groups.

  17. Book Review: Conquest in Cyberspace: National Security and Information Warfare

    Directory of Open Access Journals (Sweden)

    Gary C. Kessler

    2007-06-01

    Full Text Available Libicki, M.C. (2007. Conquest in Cyberspace: National Security and Information Warfare. New York: Cambridge University Press. 323 pages, ISBN: 978-0-521-69214-4 (paper, US$80Reviewed by Gary C. Kessler (gary.kessler@champlain.eduMany books -- and even movies ("Live Free or Die Hard" -- are based upon the premise of an impending information war. In these scenarios -- made all too plausible by the increased frequency with which we read about and experience major information security incidents -- a Bad Guy exploits known computer security vulnerabilities in order to control major national infrastructures via the Internet so as to reap financial, economic, and/or personal power.(see PDF for full review

  18. Spectroscopic investigations of surface deposited biological warfare simulants

    Science.gov (United States)

    Barrington, Stephen J.; Bird, Hilary; Hurst, Daniel; McIntosh, Alastair J. S.; Spencer, Phillippa; Pelfrey, Suzanne H.; Baker, Matthew J.

    2012-06-01

    This paper reports a proof-of-principle study aimed at discriminating biological warfare (BW) simulants from common environmental bacteria in order to differentiate pathogenic endospores in situ, to aid any required response for hazard management. We used FTIR spectroscopy combined with multivariate analysis; FTIR is a versatile technique for the non-destructive analysis of a range of materials. We also report an evaluation of multiple pre-processing techniques and subsequent differences in cross-validation accuracy of two pattern recognition models (Support Vector Machines (SVM) and Principal Component - Linear Discriminant Analysis (PC-LDA)) for two classifications: a two class classification (Gram + ve spores vs. Gram -ve vegetative cells) and a six class classification (bacterial classification). Six bacterial strains Bacillus atrophaeus, Bacillus thuringiensis var. kurstaki, Bacillus thuringiensis, Escherichia coli, Pantaeoa agglomerans and Pseudomonas fluorescens were analysed.

  19. Technological, military and social causes for the application of cyber warfare

    Directory of Open Access Journals (Sweden)

    Dragan D. Mladenović

    2012-01-01

    Full Text Available Cyber warfare is a specific new form of military conflicts the use of which is growing rapidly in the international community. However, its nature is specific and differs from all previously known forms of warfare. For the purpose of clear understanding of the nature of cyber warfare, this paper covers the basic groups of preconditions for its broad application and fast development from technological, military and social aspects. Understanding the true nature of cyber warfare is a necessary condition for building national capacities for its application that are military justified and harmonized with the international law. The paper explores the characteristic instances of cyber warfare, ranging from information propaganda to physical destruction, with the goal to determine guidelines for the possible development of cyber capacities at the national level. Based on the analysis of previous cyber warfare cases, a prediction of future development directions is made and the necessity to apply suitable methods and techniques for defense against them is analyzed.

  20. A Survey of Game Theoretic Approaches to Modelling Decision-Making in Information Warfare Scenarios

    Directory of Open Access Journals (Sweden)

    Kathryn Merrick

    2016-07-01

    Full Text Available Our increasing dependence on information technologies and autonomous systems has escalated international concern for information- and cyber-security in the face of politically, socially and religiously motivated cyber-attacks. Information warfare tactics that interfere with the flow of information can challenge the survival of individuals and groups. It is increasingly important that both humans and machines can make decisions that ensure the trustworthiness of information, communication and autonomous systems. Subsequently, an important research direction is concerned with modelling decision-making processes. One approach to this involves modelling decision-making scenarios as games using game theory. This paper presents a survey of information warfare literature, with the purpose of identifying games that model different types of information warfare operations. Our contribution is a systematic identification and classification of information warfare games, as a basis for modelling decision-making by humans and machines in such scenarios. We also present a taxonomy of games that map to information warfare and cyber crime problems as a precursor to future research on decision-making in such scenarios. We identify and discuss open research questions including the role of behavioural game theory in modelling human decision making and the role of machine decision-making in information warfare scenarios.

  1. Editorial: Discovery from Lake Turkana and History of Human Warfare

    Directory of Open Access Journals (Sweden)

    Professor S. P. Singh, Ph.D.

    2016-02-01

    Full Text Available Very interesting finds have come to light of violently killed humans from Lake Turkana in the Kenyan Rift Valley around 10000 years ago. A stunning discovery of skeletons of 27 persons who are believed to have been killed at the same time and are supposed to have suffered violent wounds has been reported recently (Nature 529, 394–398, 21 January 2016. These finds belong to a period of late Pleistocene/early Holocene of the hunter-gatherer societies from Nataruk. Among the victims were men, women and children. The individuals were killed with projectiles and blunt weapons. These skeletons were found in the lagoon and were preserved very nicely. Such type of mass killing probably could never happen as a consequence of intra-group conflict. The evidence seems to be towards warfare and aggression in ancient societies. The experts ruled out the possibility of a cemetery and ceremonial burial. This discovery of 27 skeletons points to the fact that there may have been more causalities and many individuals might have escaped death at that time. According to one of the co-authors of this research Dr. R.A. Foley, the groups were elatively more densely packed populations than the hunter gatherers and had more chances of having inter-group conflicts because of sharing the resources which would have been plentiful near the lagoons and water bodies. Violence probably has been in the instinct of early humans and that the warfare among humans has a history of 10000 years or even earlier.

  2. A Square Peg in a Round Hole: A Case Study of Center Gravity Application in Counter Insurgency Warfare

    Science.gov (United States)

    2011-06-01

    D.C.: Potomac Books, 2010. Griffith, Samuel B. The Illustrated Art of War. New York: Oxford University Press, 2005. Guevara , Ernesto Che, Brian... Guevara provided another approach to insurgency, encapsulated in the concept of the foco, which he described in his 1960 work Guerrilla Warfare. The... Guevara , Guerrilla Warfare, edited by Brian Loveman and Thomas Davies, (Oxford: SR Books, 1997), 7. 21 Guevara , Guerrilla Warfare, 256. 22 Guevara

  3. Catalytic bioscavengers in nerve agent poisoning: A promising approach?

    Science.gov (United States)

    Worek, Franz; Thiermann, Horst; Wille, Timo

    2016-02-26

    The repeated use of the nerve agent sarin against civilians in Syria in 2013 emphasizes the continuing threat by chemical warfare agents. Multiple studies demonstrated a limited efficacy of standard atropine-oxime treatment in nerve agent poisoning and called for the development of alternative and more effective treatment strategies. A novel approach is the use of stoichiometric or catalytic bioscavengers for detoxification of nerve agents in the systemic circulation prior to distribution into target tissues. Recent progress in the design of enzyme mutants with reversed stereo selectivity resulting in improved catalytic activity and their use in in vivo studies supports the concept of catalytic bioscavengers. Yet, further research is necessary to improve the catalytic activity, substrate spectrum and in vivo biological stability of enzyme mutants. The pros and cons of catalytic bioscavengers will be discussed in detail and future requirements for the development of catalytic bioscavengers will be proposed.

  4. Tutorial on agent-based modeling and simulation.

    Energy Technology Data Exchange (ETDEWEB)

    Macal, C. M.; North, M. J.; Decision and Information Sciences

    2005-01-01

    Agent-based modeling and simulation (ABMS) is a new approach to modeling systems comprised of autonomous, interacting agents. ABMS promises to have far-reaching effects on the way that businesses use computers to support decision-making and researchers use electronic laboratories to support their research. Some have gone so far as to contend that ABMS is a third way of doing science besides deductive and inductive reasoning. Computational advances have made possible a growing number of agent-based applications in a variety of fields. Applications range from modeling agent behavior in the stock market and supply chains, to predicting the spread of epidemics and the threat of bio-warfare, from modeling consumer behavior to understanding the fall of ancient civilizations, to name a few. This tutorial describes the theoretical and practical foundations of ABMS, identifies toolkits and methods for developing ABMS models, and provides some thoughts on the relationship between ABMS and traditional modeling techniques.

  5. Percutaneous coronary intervention in the elderly with ST-segment elevation myocardial infarction

    Directory of Open Access Journals (Sweden)

    Gao L

    2014-07-01

    Full Text Available Lei Gao,* Xin Hu,* Yu-Qi Liu, Qiao Xue, Quan-Zhou FengInstitute of Geriatric Cardiology, Chinese PLA General Hospital, Beijing, People’s Republic of China*These authors contributed equally to this workAbstract: As a result of increased life expectancy, octogenarians constitute an increasing ­proportion of patients admitted to hospital for ST-segment elevation myocardial infarction (STEMI. Primary percutaneous coronary intervention is currently the treatment of choice for octogenarians presenting with STEMI. The recent literature on this topic has yielded controversial results, even though advances in drug-eluting stents and new types of antithrombotic agents are improving the management of STEMI and postoperative care. In this paper, we review the current status of percutaneous coronary intervention in the elderly with STEMI, including the reasons for their high mortality and morbidity, predictors of mortality, and strategies to improve outcomes.Keywords: octogenarians, percutaneous coronary intervention, ST-segment elevation myocardial infarction

  6. Cyclosarin-An Organophosphate Nerve Agent

    Directory of Open Access Journals (Sweden)

    G. Krejcova

    2005-04-01

    Full Text Available Organophosphorus compounds ascribed to as nerve agents (sarin, soman, tabun, cyclosarin are highly toxic, and are considered to be the most dangerous chemical compounds. All apparently share a common mechanism of cholinesterase inhibition and can cause similar sv.m .ot oms. The standard therapy, in the case of organophosphorus poisoning, has the prophylactic use of reversibly acting AChE inhibitors and antidotal administration of AChE reactivators-oximes. Unfortunately, none of these oximes can be regarded as a broad spectrum antidote, ie, effective against all nerve agents. While the presently available oximes (pralidoxime, ohidoxime are not considered to be sufficiently effective against nerve agents, especially in the case of soman poisoning, the H oximes (HI-6, HLo7 appear to,be very promising antidotes against nerve agents because these are able to protect the experimental animals from toxic effects and improve survival of animals poisoned with supralethal doses. A lot of research has been pursued on the treatment of sarin, soman, and tabun, but cyclosarin was not considered for such a study for a long time. Recently, attention of researchers has also turned to cyclosarin because of its potential use as a chemical warfare agent. Cyclosarin is highly toxic organophosphorus compound which is resistant to conventional oxime therapy. This paper reviews the latest positionof cyclosarin in standpoint of medical treatment by various reactivators considering the ability of various oximes, HI-6, HS-6, BI-6, and KO33 of their reactivation potency.

  7. Percutaneous heart valves; past, present and future.

    Science.gov (United States)

    Rozeik, M M; Wheatley, D J; Gourlay, T

    2014-09-01

    Percutaneous heart valves provide a promising future for patients refused surgery on the grounds of significant technical challenges or high risk for complications. Since the first human intervention more than 10 years ago, over 50 different types of valves have been developed. The CoreValve and Edwards SAPIEN valves have both experienced clinical trials and the latter has gained FDA approval for implantation in patients considered inoperable. Current complications, such as major vascular bleeding and stroke, prevent these valves from being commonly deployed in patients considered operable in conventional surgery. This review focuses on the past and present achievements of these valves and highlights the design considerations required to progress development further. It is envisaged that, with continued improvement in valve design and with increased clinical and engineering experience, percutaneous heart valve replacement may one day be a viable option for lower-risk operable patients.

  8. Percutaneous penetration through slightly damaged skin

    DEFF Research Database (Denmark)

    Nielsen, Jesper B

    2005-01-01

    Guidelines for experimental studies of percutaneous penetration prescribe optimal barrier integrity of the skin. The barrier integrity of the skin exposed in occupational or household situations is, however, not always ideal, and skin problems are among the most dominant reasons for absence from...... work. We have therefore evaluated an experimental model for percutaneous penetration through slightly damaged skin. The influence of a slight damage to the skin was evaluated using five pesticides covering a wide range of solubilities. We used an experimental model with static diffusion cells mounted...... with human skin. A slight damage to the barrier integrity was induced by pre-treatment of the skin with sodium lauryl sulphate (SLS) before pesticide exposure. The experimental model with 3 h pre-treatment with SLS (0.1% or 0.3%) assured a significant but controlled damage to the barrier integrity, a damage...

  9. Mutagenesis of organophosphorus hydrolase to enhance hydrolysis of the nerve agent VX.

    Science.gov (United States)

    Gopal, S; Rastogi, V; Ashman, W; Mulbry, W

    2000-12-20

    Organophosphorus hydrolase (OPH) is capable of hydrolyzing a wide variety of organophosphorus pesticides and chemical warfare agents. However, the hydrolytic activity of OPH against the warfare agent VX is less than 0.1% relative to its activity against parathion and paraoxon. Based on the crystal structure of OPH and the similarities it shares with acetylcholinesterase, eight OPH mutants were constructed with the goal of increasing OPH activity toward VX. The activities of crude extracts from these mutants were measured using VX, demeton-S methyl, diisopropylfluoro-phosphate, ethyl parathion, paraoxon, and EPN as substrates. One mutant (L136Y) displayed a 33% increase in the relative VX hydrolysis rate compared to wild type enzyme. The other seven mutations resulted in 55-76% decreases in the relative rates of VX hydrolysis. There was no apparent relationship between the hydrolysis rates of VX and the rates of the other organophosphorus compounds tested.

  10. Percutaneous treatment in patients presenting with malignant cardiac tamponade

    Energy Technology Data Exchange (ETDEWEB)

    Marcy, P.Y. [Antoine Lacassagne Center, Interventional Radiology Department, Nice (France); Bondiau, P.Y. [Antoine Lacassagne Center, Radiation Therapy Department, Nice (France); Brunner, P. [Centre Hospitalier Princesse, Grace (Monaco). Interventional Radiology Department

    2005-09-01

    The percutaneous treatment of pericardial effusion resulting in cardiac tamponade has undergone an evolution in recent years with the use of less invasive drainage techniques in selected cases. To determine optimal therapy modalities for oncology patients with malignant pericardial tamponade (MPT), the authors review their institutional experience with percutaneous needle puncture routes, means of imaging-guided drainage and percutaneous management of the pericardial fluid effusion (pericardial sclerosis and balloon pericardiotomy). Advantages and limits of the percutaneous techniques will be compared to the surgical treatment. (orig.)

  11. Use of clopidogrel in the reduction of myocardial damage during percutaneous coronary intervention

    Directory of Open Access Journals (Sweden)

    Arijit Dasgupta

    2009-03-01

    Full Text Available Arijit Dasgupta, Debabrata MukherjeeGill Heart Institute, University of Kentucky, Lexington, KY, USAAbstract: It is estimated that approximately a quarter of patients undergoing coronary intervention may have significant post-procedural creatinine (CK/creatinine kinase myocardial band (CK-MB elevations and approximately half may have post-procedural troponin elevations. Current data suggest that periprocedural infarction is associated with short-, intermediate-, and long-term adverse outcomes, most notably mortality. This review examines the role of clopidogrel in decreasing periprocedural myonecrosis following percutaneous coronary intervention (PCI. Clopidogrel is an important pharmacologic agent used to reduce myocardial infarction post-coronary intervention as assessed directly by the evaluation of cardiac biomarkers and indirectly by the evaluation of short-term ischemic events. The optimal dose of clopidogrel is considered to be at least 300 mg given 6 to 15 hours prior to PCI but there is considerable evidence to suggest that a loading dose of 600 mg given 2 to 6 hours prior to PCI may be more efficacious in limiting post-coronary intervention events. The benefit obtained from clopidogrel appears independent of and incremental to that of other antiplatelet and antithrombotic agents used during and after coronary intervention.Keywords: percutaneous coronary intervention, myonecrosis, clopidogrel, antiplatelet agents, myocardial infarction 

  12. Ultrasound Guided Percutaneous Nephrostomy For Obstructive Uropathy

    Directory of Open Access Journals (Sweden)

    Abdullah Gedik

    2008-01-01

    Full Text Available We retrospectively evaluated the indications and complications in our patients that were performed of percutaneous nephrostomy applications with ultrasonography guidance.We evaluated 371 all patients whom applied percutaneous nephrostomy with ultrasonography guidance between January 2002 and December 2005 were evaluated retrospectively. The demographic data, cause of the obstruction, minor and major complications of patients were discussed.In this period, totally 455 Percutaneous nephrostomies (84 bilaterally, 287 unilaterally in 371 patients (were placed in 113 females (30.45 % and 258 males were placed. The male (69.55% patients whom mean age of the patients were 32.17 year (range 5 months to 85 years. In 17 of 371 (3.73% patients, it was determined with antegrade pyelography that nephro stomy catheters were not in the kidney. Total success ratio was 96.37%. Causes of the obstructions were malignant diseases in for 76 patients (20.48% and were benign diseases in for 295 patients (79.52%. The major complications were determined twenty-four of patients (6.46%. Major complications included macroscopic hematuria which needs transfusion (7 patients, septicemia (14 patients, and retroperitoneal colon perforation with needle (3 patients were observed in 24 of the 371 patients. Minor complications were observed in 51 of the 371 patients (13.74 %. All of the minor complications were macroscopic hematuria that resolved in less than 24 hours. In conclusion, percutaneous nephrostomy with ultrasonography guidance were found as an effective and, safe and successful method for the drainage of upper urinary tract in the obstructive uropaty.

  13. Percutaneous ultrasound guided umbilical cord blood sampling

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Seung Hyup; Choi, B. I.; Kim, C. W.; Youn, B. H.; Shin, H. C.; Kim, S. O. [Seoul National University College of Medicine, Seoul (Korea, Republic of)

    1989-12-15

    This report describes a technique and the result of percutaneous ultrasound-guided umbilical cord blood sampling and its potential use in the management of diagnostic problems in the second and third trimester of pregnancy. This method has been employed in the prenatal assessment of 19 fetuses at risk for chromosomal disorders, fetal hypoxia and hematologic disorders. This simple and rapid procedure offers a safe access to the fetal circulation

  14. Promising results after percutaneous mitral valve repair

    DEFF Research Database (Denmark)

    Ihlemann, Nikolaj; Franzen, Olaf; Jørgensen, Erik;

    2011-01-01

    Mitral valve regurgitation (MR) is the secondmost frequent valve disease in Europe. Untreated MR causes considerable morbidity and mortality. In the elderly, as many as half of these patients are denied surgery because of an estimated high surgical risk. Percutaneous mitral valve repair with the ...... with the MitraClip system resembles the Alfieristitch where a clip is used to connect the tip of the mitral valve leaflets....

  15. Promising results after percutaneous mitral valve repair

    DEFF Research Database (Denmark)

    Ihlemann, Nikolaj; Franzen, Olaf; Jørgensen, Erik;

    2011-01-01

    Mitral valve regurgitation (MR) is the secondmost frequent valve disease in Europe. Untreated MR causes considerable morbidity and mortality. In the elderly, as many as half of these patients are denied surgery because of an estimated high surgical risk. Percutaneous mitral valve repair...... with the MitraClip system resembles the Alfieristitch where a clip is used to connect the tip of the mitral valve leaflets....

  16. A Percutaneous Knotless Technique for SLAP Repair.

    Science.gov (United States)

    Tennent, Duncan; Pearse, Eyiyemi

    2016-02-01

    We describe a percutaneous technique for repair of type II SLAP lesions. Through the Neviaser portal, a spinal needle is used to pass a FiberStick suture (Arthrex, Naples, FL) through the labrum to create 2 mattress sutures that are secured with PushLock anchors (Arthrex). This technique is simple, reproducible, and knotless and requires no cannulas. At the end of the procedure, minimal suture material remains in the joint.

  17. Management of antiplatelet therapy during acute percutaneous coronary intervention: new strategies and therapeutics.

    Science.gov (United States)

    Tan, Jack W C; Guo, Kenneth W Q

    2010-03-01

    Aggressive intravenous and oral dual antiplatelet therapy has established primary percutaneous coronary intervention (PCI) as the standard of care for acute myocardial infarction. Clopidogrel is currently the thienopyridine of choice for dual antiplatelet therapy in patients treated with PCI. The dose regime and duration of therapy of clopidogrel has undergone multiple refinements. Recently, 2 novel third generation oral inhibitors of P2Y12 receptors, prasugrel and ticagrelor, have undergone clinical evaluation with promising results. This article is a non-exhaustive review of the literature, concentrating on the role of current and novel oral antiplatelet agents for acute myocardial infarction particularly highlighting the limitations and issues associated with clopidogrel use.

  18. Female rats are less susceptible during puberty to the lethal effects of percutaneous exposure to VX

    OpenAIRE

    Wright, Linnzi K.M.; Lee, Robyn B.; Clarkson, Edward D.; Lumley, Lucille A

    2016-01-01

    Nerve agents with low volatility such as VX are primarily absorbed through the skin when released during combat or a terrorist attack. The barrier function of the stratum corneum may be compromised during certain stages of development, allowing VX to more easily penetrate through the skin. However, age-related differences in the lethal potency of VX have yet to be evaluated using the percutaneous (pc) route of exposure. Thus, we estimated the 24 and 48 h median lethal dose for pc exposure to ...

  19. Management of hemorrhage after percutaneous renal surgery.

    Science.gov (United States)

    Gallucci, M; Fortunato, P; Schettini, M; Vincenzoni, A

    1998-12-01

    Percutaneous renal surgery is routine therapy for a number of renal pathologies. It is a technique not without complications, often serious ones, of which the worst is bleeding. We reviewed our experience of the incidence, etiology, and management of this serious complication to determine a protocol of treatment that will minimize the consequences. Between 1984 and 1996, we carried out 976 percutaneous operations for reno-calix stones, pyeloureteral junction stenosis, neoplasia of the renal pelvis, diagnosis, and ureteral prostheses. In all cases, the percutaneous access was achieved through a lower calix in the posterior axillary line with the patient in a prone position. The lithotripsy was performed with ultrasound and balistic energy lithotripters. Antegrade endopyelotomy was performed according to our technique. At the end of the procedure, a nephrostomy tube was positioned, 24F for lithotripsy and 16F for endopyelotomy. The nephrostomy tube was removed after 24 to 48 hours. In this series, 146 patients (15%) presented significant perioperative bleeding. In 97 cases (10%), this complication was resolved with the repositioning of the nephrostomy tube, bedrest in a supine position, and observation, whereas in 49 cases (5%), clamping of the nephrostomy tube for 24 hours was necessary. In 56 patients (5.7%), two blood transfusions were necessary, and three patients (0.3%) had bleeding 10, 12, and 20 days after the operation, which was resolved by embolization of the lacerated vessel.

  20. Imaging in percutaneous ablation for atrial fibrillation

    Energy Technology Data Exchange (ETDEWEB)

    Maksimovic, Ruzica [Erasmus Medical Center, Department of Radiology, GD Rotterdam (Netherlands); Institute for Cardiovascular Diseases of the University Medical Center, Belgrade (Czechoslovakia); Dill, Thorsten [Kerckhoff-Heart Center, Department of Cardiology, Bad Nauheim (Germany); Ristic, Arsen D.; Seferovic, Petar M. [Institute for Cardiovascular Diseases of the University Medical Center, Belgrade (Czechoslovakia)

    2006-11-15

    Percutaneous ablation for electrical disconnection of the arrhythmogenic foci using various forms of energy has become a well-established technique for treating atrial fibrillation (AF). Success rate in preventing recurrence of AF episodes is high although associated with a significant incidence of pulmonary vein (PV) stenosis and other rare complications. Clinical workup of AF patients includes imaging before and after ablative treatment using different noninvasive and invasive techniques such as conventional angiography, transoesophageal and intracardiac echocardiography, computed tomography (CT) and magnetic resonance imaging (MRI), which offer different information with variable diagnostic accuracy. Evaluation before percutaneous ablation involves assessment of PVs (PV pattern, branching pattern, orientation and ostial size) to facilitate position and size of catheters and reduce procedure time as well as examining the left atrium (presence of thrombi, dimensions and volumes). Imaging after the percutaneous ablation is important for assessment of overall success of the procedure and revealing potential complications. Therefore, imaging methods enable depiction of PVs and the anatomy of surrounding structures essential for preprocedural management and early detection of PV stenosis and other ablation-related procedures, as well as long-term follow-up of these patients. (orig.)

  1. Percutaneous Cryoablation for Renal Cell Carcinoma

    Directory of Open Access Journals (Sweden)

    Tsitskari Maria

    2015-06-01

    Full Text Available Renal cell carcinoma (RCC is the most common type of kidney cancer in adults. Nephron sparing resection (partial nephrectomy has been the “gold standard” for the treatment of resectable disease. With the widespread use of cross sectional imaging techniques, more cases of renal cell cancers are detected at an early stage, i.e. stage 1A or 1B.  This has provided an impetus for expanding the nephron sparing options and especially, percutaneous ablative techniques.  Percutaneous ablation for RCC is now performed as a standard therapeutic nephron-sparing option in patients who are poor candidates for resection or when there is a need to preserve renal function due to comorbid conditions, multiple renal cell carcinomas, and/or heritable renal cancer syndromes. During the last few years, percutaneous cryoablation has been gaining acceptance as a curative treatment option for small renal cancers. Clinical studies to date indicate that cryoablation is a safe and effective therapeutic method with acceptable short and long term outcomes and with a low risk, in the appropriate setting.  In addition it seems to offer some advantages over radio frequency ablation (RFA and other thermal ablation techniques for renal masses.

  2. Percutaneous Zenith endografting for abdominal aortic aneurysms.

    Science.gov (United States)

    Heyer, Kamaldeep S; Resnick, Scott A; Matsumura, Jon S; Amaranto, Daniel; Eskandari, Mark K

    2009-03-01

    A completely percutaneous approach to infrarenal abdominal aortic aneurysm (AAA) endografting has the theoretic benefits of being minimally invasive and more expedient. Our goal was to demonstrate the utility of this approach using a suprarenal fixation device and a suture-mediated closure system. We conducted a single-institution, retrospective review of 14 patients who underwent percutaneous AAA repair with the Zenith device between August 2003 and March 2007. Immediate and delayed access-related outcomes were examined over a mean follow-up of 12.1+/-2.0 months. Mean AAA size was 5.6 cm. Immediate arterial closure and technical success rate was 96% (27/28 vessels). One immediate hemostatic failure required open surgical repair. Over follow-up, one vessel required operative repair for new-onset claudication. No other immediate or delayed complications (thrombosis, pseudoaneurysm, infection, or deep venous thrombosis) were detected. A percutaneous approach for the treatment of AAA has several advantages over femoral artery cutdown but also has its own unique set of risks in the immediate and late postoperative period. Ultimately, the "preclose technique" can be safely applied for the Zenith device despite its large-bore delivery system.

  3. An electronic nose for the detection of Sarin, Soman and Tabun mimics and interfering agents

    OpenAIRE

    2014-01-01

    An electronic nose system (E-nose) with metal oxide semiconductor sensors (MOS) has been designed to discriminate and quantify different chemical warfare agents (CWA) mimics. The E-nose consists of an array of commercial MOS for different gases, two sensors for temperature sensing, a sample handling system, a data acquisition system and a laptop with the data acquisition system control. With this device, discrimination studies have been carried out to detect specific CWA simulants...

  4. Robust Parameter Design for Agent-Based Simulation Models With Application in a Cultural Geography Model

    Science.gov (United States)

    2010-06-01

    Ajzen , I. (2006). Theory of planned behavior . Retrieved May 24, 2010, from http://people.umass.edu/aizen/tpb.html Alt, J. K., Jackson, L. A., Hudak...Cultural Geography, Agent-Based Model (ABM), Irregular Warfare (IW), Theory of planned Behavior (TpB), Baysian Belief Nets (BBN), Counterinsurgency...Strategic Multi-layered Assessment SSTR Security, Stability, Transition and Reconstruction Operations TPB Theory of Planned Behavior TRAC-MTRY

  5. Molecular Evolution of Human PON to Design Enhanced Catalytic Efficiency for Hydrolysis of Nerve Agents

    Science.gov (United States)

    2011-12-01

    Sussman, J.L., Tawfik, D.S. The use of recombinant paraoxonases as bioscavengers for the pretreatment/treatment of organophosphate poisoning , 13th...2006). 10. Bird, S.B., Dawson, A. & Ollis, D. Enzymes and bioscavengers for prophylaxis and treatment of organophosphate poisoning . Front. Biosci...intercepting both existing and emerging organophosphate -based chemical warfare nerve agents (CWNA). The 5 years of performance under this project

  6. Molecular Evolution of Human PON to Design Enhanced Catalytic Efficiency for Hydrolysis of Nerve Agents

    Science.gov (United States)

    2011-06-01

    biomolecules that can intercept both existing and emerging organo - phosphate-based chemical warfare nerve agents (CWNA). All 5th year milestones have been met...w e have demonstrated the potential of direct ed evolution, combining random and designed mutations based on 3D struct ures, to generate m utants of...I., Harel, M., Rosenberry, T.L. & Sussman, J.L. (2010). “Acetylcholinesterase: From 3D structure to function ” Chem Biol Interact, 187, 10-22

  7. Passive front-ends for wideband millimeter wave electronic warfare

    Science.gov (United States)

    Jastram, Nathan Joseph

    This thesis presents the analysis, design and measurements of novel passive front ends of interest to millimeter wave electronic warfare systems. However, emerging threats in the millimeter waves (18 GHz and above) has led to a push for new systems capable of addressing these threats. At these frequencies, traditional techniques of design and fabrication are challenging due to small size, limited bandwidth and losses. The use of surface micromachining technology for wideband direction finding with multiple element antenna arrays for electronic support is demonstrated. A wideband tapered slot antenna is first designed and measured as an array element for the subsequent arrays. Both 18--36 GHz and 75--110 GHz amplitude only and amplitude/phase two element direction finding front ends are designed and measured. The design of arrays using Butler matrix and Rotman lens beamformers for greater than two element direction finding over W band and beyond using is also presented. The design of a dual polarized high power capable front end for electronic attack over an 18--45 GHz band is presented. To combine two polarizations into the same radiating aperture, an orthomode transducer (OMT) based upon a new double ridge waveguide cross section is developed. To provide greater flexibility in needed performance characteristics, several different turnstile junction matching sections are tested. A modular horn section is proposed to address flexible and ever changing operational requirements, and is designed for performance criteria such as constant gain, beamwidth, etc. A multi-section branch guide coupler and low loss Rotman lens based upon the proposed cross section are also developed. Prototyping methods for the herein designed millimeter wave electronic warfare front ends are investigated. Specifically, both printed circuit board (PCB) prototyping of micromachined systems and 3D printing of conventionally machined horns are presented. A 4--8 GHz two element array with

  8. Guerilla Warfare & Law Enforcement: Combating the 21st Century Terrorist Cell within the U.S.

    Directory of Open Access Journals (Sweden)

    Major Richard Hughbank

    2009-01-01

    Full Text Available Both domestic and international terrorist organizations employ guerrilla warfare tactics, techniques, and procedures. Thus, the ability to identify and defeat the members of these organizations, cripple their infrastructures, and disrupt their financial resources lies in the understanding of modern guerrilla warfare as it develops in the twenty-first century within the United States.3 The forms of asymmetric warfare4 adopted by domestic and international terrorist groups alike is no longer intended to gain simple media exposure or governmental manipulation; they want to make an overpowering impact by causing massive loss of life and severe damage to infrastructure and are often motivated by religious imperatives and political goals. As terrorism analyst Stephen Flynn has observed, "Throughout the 20th century [Americans] were able to treat national security as essentially an out-of-body experience. When confronted by threats, [America] dealt with them on the turf of our allies or our adversaries. Aside from the occasional disaster and heinous crime, civilian life [in the United States] has been virtually terror-free." With the turn of the twenty-first century, terrorist operations have become more prevalent in the United States and are taking shape in the form of modern guerrilla warfare, thus creating new challenges for federal, state, and local law enforcement agencies. After reviewing the origin and nature of these challenges, this article will offer some suggestions for countering guerilla warfare in the United States.

  9. [Uricosuric agent].

    Science.gov (United States)

    Ohno, Iwao

    2008-04-01

    Urate lowering treatment is indicated in patients with recurrent acute attacks, tophi, gouty arthropathy, radiographic changes of gout, multiple joint involvement, or associated uric acid nephrolithiasis. Uricosuric agents like benzbromarone and probenecid are very useful to treat hyperuricemia as well as allopurinol (xanthine oxidase inhibitor). Uricosuric agents act the urate lowering effect through blocking the URAT1, an urate transporter, in brush border of renal proximal tubular cells. In order to avoid the nephrotoxicity and urolithiasis due to increasing of urinary urate excretion by using uricosuric agents, the proper urinary tract management (enough urine volume and correction of aciduria) should be performed.

  10. Research on performance of ethernet interface in network centric warfare

    Institute of Scientific and Technical Information of China (English)

    梁永生; 张乃通

    2004-01-01

    The concept of network centric warfare (NCW) and its character, high requirement of real-time synchronization are introduced. The distributed equal-node network architecture in NCW is presented. Based on theoretical analysis on ethernet interface performance, this paper presents that forwarding latency between ethernet interface devices is a key influence factor of real-time synchronization in NCW. Ethernet fundamental is briefly introduced. The model between a switch under test (SUT) and a smartbits card is presented and used for two interconnecting switches in NCW. On condition that ignoring the latency of connecting fiber or twisted pairs and processing latency of the smartbits test system, this paper presents that clock frequency tolerance (CFT) between a SUT and a smartbits card is a leading influence factor of forwarding latency of an ethernet switch. The formulae to calculate internal forwarding latency and forwarding latency caused by its CFT are deduced. Theoretical calculation on forwarding latency of an ethernet switch based on the given CFT and test time is implemented. Experimental study on primary forwarding latency and secondary forwarding latency is implemented and forwarding latency between the SUT and the smartbits card is measured, thus testifying the accuracy of the above theoretical analysis that the CFT is a key influence factor of forwarding latency. The measures to satisfy the needs of forwarding latency in NCW are presented.

  11. Drone Warfare: Twenty-First Century Empire and Communications

    Directory of Open Access Journals (Sweden)

    Kevin Howley

    2017-02-01

    Full Text Available This paper, part of a larger project that examines drones from a social-construction of technology perspective, considers drone warfare in light of Harold Innis’s seminal work on empire and communication. Leveraging leading-edge aeronautics with advanced optics, data processing, and networked communication, drones represent an archetypal “space-biased” technology. Indeed, by allowing remote operators and others to monitor, select, and strike targets from half a world away, and in real-time, these weapon systems epitomize the “pernicious neglect of time” Innis sought to identify and remedy in his later writing. With Innis’s time-space dialectic as a starting point, then, the paper considers drones in light of a longstanding paradox of American culture: the impulse to collapse the geographical distance between the United States and other parts of the globe, while simultaneously magnifying the cultural difference between Americans and other peoples and societies. In the midst of the worldwide proliferation of drones, this quintessentially sublime technology embodies this (disconnect in important, profound, and ominous ways.

  12. Back to the future: aerial warfare in Libya

    Directory of Open Access Journals (Sweden)

    João Paulo Nunes Vicente

    2013-05-01

    Full Text Available A century after the first air bomb mission, a new intervention in the same geographic space has made evident the changes in Airpower. The Aerial Warfare in Libya has radically changed the civil war, complying with a UN mission to protect Libyan population, imposing a no-fly zone and an arms embargo. Therefore, Operation Unified Protector became one of the most successful campaigns in the history of NATO. We aim to assess the operational efficiency of Airpower in the conflict in Libya, focusing on the challenges of a War essentially Aerial. Despite the military results and the fact that some political objectives were met, we can identify some concerning trends that, if not shifted, may negatively influence future NATO operations. We do not aim to draw general and universal conclusions on the strategic value of Airpower based on the analysis of a specific case. Above all, we focus on identifying some lessons which have influenced OUP operational efficiency. Thus, we must analyze some factors, such as the scope of objectives, the type of opposing action and aerial strategy used by the coalition and then focus on the challenges arising from the OUP.

  13. Vasoactive Agents

    OpenAIRE

    Husedzinovic, Ino; Bradic, Nikola; Goranovic, Tanja

    2006-01-01

    This article is a short review of vasoactive drugs which are in use in todays clinical practice. In the past century, development of vasoactive drugs went through several phases. All of these drugs are today divided into several groups, depending on their place of action, pharmacological pathways and/or effects on target organ or organ system. Hence, many different agents are today in clinical practice, we have shown comparison between them. These agents provide new directions in the treatmen...

  14. Renal lymphangiomatosis during pregnancy: management with percutaneous drainage

    Energy Technology Data Exchange (ETDEWEB)

    Oezmen, M.; Akata, D.; Akhan, O. [Hacettepe Univ., Ankara (Turkey). Dept. of Radiology; Deren, Oe.; Durukan, T. [Hacettepe Univ., Ankara (Turkey). Dept. of Obstetrics and Gynecology; Oezen, H. [Hacettepe Univ., Ankara (Turkey). Dept. of Urology

    2001-01-01

    We report a unique case of exacerbation of renal lymphangiomatosis during pregnancy which was managed percutaneously until delivery. Renal lymphangiomatosis is a very rare benign disorder that might cause abdominal pain and rarely hypertension and hematuria. Surgical treatment options may result in nephrectomy. Percutaneous drainage of symptomatic renal lymphangiomas should be viewed as an efficient therapeutic option particularly when surgery is contraindicated. (orig.)

  15. A Rare Complication of Percutaneous Nephrolithotomy: Biliary Peritonitis

    Directory of Open Access Journals (Sweden)

    Sadi Turkan

    2014-04-01

    Full Text Available Percutaneous nephrolithotomy is a common method in stone therapy in the last 30 years. High success rates as well as high complication rates are also available. We present offer patient who developing gallbladder injury and peritonitis in percutaneous nephrolithotomy for the right renal pelvis, mid, and lower calyces stone.

  16. A Rare Complication of Percutaneous Nephrolithotomy: Biliary Peritonitis

    OpenAIRE

    Sadi Turkan

    2014-01-01

    Percutaneous nephrolithotomy is a common method in stone therapy in the last 30 years. High success rates as well as high complication rates are also available. We present offer patient who developing gallbladder injury and peritonitis in percutaneous nephrolithotomy for the right renal pelvis, mid, and lower calyces stone.

  17. Percutaneous reduction and fixation of intraarticular calcaneal fractures

    NARCIS (Netherlands)

    T. Schepers (Tim); L.M.M. Vogels (Lucas); I.B. Schipper (Inger); P. Patka (Peter)

    2008-01-01

    textabstractObjective: Percutaneous reduction by distraction and subsequent percutaneous screw fixation to restore calcaneal and posterior talocalcaneal facet anatomy. The aim of this technique is to improve functional outcome and to diminish the rate of secondary posttraumatic arthrosis compared to

  18. Percutaneous management of tumoral biliary obstruction in children

    Energy Technology Data Exchange (ETDEWEB)

    Akinci, Devrim; Gumus, Burcak; Ozkan, Orhan S.; Ozmen, Mustafa N.; Akhan, Okan [Hacettepe School of Medicine, Department of Radiology, Sihhiye, Ankara (Turkey); Ekinci, Saniye [Hacettepe School of Medicine, Department of Paediatric Surgery, Sihhiye, Ankara (Turkey); Akcoren, Zuhal [Hacettepe School of Medicine, Department of Paediatric Pathology, Sihhiye, Ankara (Turkey); Kutluk, Tezer [Hacettepe School of Medicine, Department of Paediatric Oncology, Sihhiye, Ankara (Turkey)

    2007-10-15

    There is limited experience of percutaneous biliary interventions in children although they are safe and effective procedures. To evaluate the efficacy and safety of percutaneous management of tumoral biliary obstruction in children. Percutaneous biliary interventions were performed in eight children (six boys, two girls) with a mean age of 10.5 years (range 4-17 years). The interventions included percutaneous biliary drainage (five patients), percutaneous biliary drainage and placement of a self-expanding metallic stent (two patients), and percutaneous cholecystostomy (one patient). All patients had signs of obstructive jaundice and two had cholangitis. All procedures were successful. No procedure-related mortality was observed. Bilirubin levels returned to normal in four of the eight patients. Findings of cholangitis resolved in the two affected patients after the procedure and antibiotic treatment. Two patients underwent surgery after percutaneous biliary drainage procedures. A self-expanding metallic stent was placed in two patients with malignancy and the stents remained patent until death. Percutaneous biliary interventions can be performed safely for the management of tumoral biliary obstruction in children. (orig.)

  19. Polymeric micelles as carriers of diagnostic agents.

    Science.gov (United States)

    Trubetskoy

    1999-04-01

    This review deals with diagnostic applications of polymeric micelles composed of amphiphilic block-copolymers. In aqueous solutions these polymers spontaneously form particles with diameter 20-100 nm. A variety of diagnostic moieties can be incorporated covalently or non-covalently into the particulates with high loads. Resulting particles can be used as particulate agents for diagnostic imaging using three major imaging modalities: gamma-scintigraphy, magnetic resonance imaging and computed tomography. The use of polyethyleneoxide-diacyllipid micelles loaded with chelated (111)In/Gd(3+) as well as iodine-containing amphiphilic copolymer in percutaneous lymphography and blood pool/liver imaging are discussed as specific examples.

  20. Can biowarfare agents be defeated with light?

    Science.gov (United States)

    Vatansever, Fatma; Ferraresi, Cleber; de Sousa, Marcelo Victor Pires; Yin, Rui; Rineh, Ardeshir; Sharma, Sulbha K; Hamblin, Michael R

    2013-01-01

    Biological warfare and bioterrorism is an unpleasant fact of 21st century life. Highly infectious and profoundly virulent diseases may be caused in combat personnel or in civilian populations by the appropriate dissemination of viruses, bacteria, spores, fungi, or toxins. Dissemination may be airborne, waterborne, or by contamination of food or surfaces. Countermeasures may be directed toward destroying or neutralizing the agents outside the body before infection has taken place, by destroying the agents once they have entered the body before the disease has fully developed, or by immunizing susceptible populations against the effects. A range of light-based technologies may have a role to play in biodefense countermeasures. Germicidal UV (UVC) is exceptionally active in destroying a wide range of viruses and microbial cells, and recent data suggests that UVC has high selectivity over host mammalian cells and tissues. Two UVA mediated approaches may also have roles to play; one where UVA is combined with titanium dioxide nanoparticles in a process called photocatalysis, and a second where UVA is combined with psoralens (PUVA) to produce “killed but metabolically active” microbial cells that may be particularly suitable for vaccines. Many microbial cells are surprisingly sensitive to blue light alone, and blue light can effectively destroy bacteria, fungi, and Bacillus spores and can treat wound infections. The combination of photosensitizing dyes such as porphyrins or phenothiaziniums and red light is called photodynamic therapy (PDT) or photoinactivation, and this approach cannot only kill bacteria, spores, and fungi, but also inactivate viruses and toxins. Many reports have highlighted the ability of PDT to treat infections and stimulate the host immune system. Finally pulsed (femtosecond) high power lasers have been used to inactivate pathogens with some degree of selectivity. We have pointed to some of the ways light-based technology may be used to defeat

  1. Timing of decontamination and treatment in case of percutaneous VX poisoning: a mini review.

    Science.gov (United States)

    Joosen, Marloes J A; van der Schans, Marcel J; Kuijpers, Willem C; van Helden, Herman P M; Noort, Daan

    2013-03-25

    Low volatile organophosphorous nerve agents such as VX, will most likely enter the body via the skin. The pharmacokinetics of drugs such as oximes, atropine and diazepam, are not aligned with the variable and persistent toxicokinetics of the agent. Repeated administration of these drugs showed to improve treatment efficacy compared to a single injection treatment. Because of the effectiveness of continuous treatment, it was investigated to what extent a subchronic pretreatment with carbamate (pyridostigmine or physostigmine combined with either procyclidine or scopolamine) would protect against percutaneous VX exposure. Inclusion of scopolamine in the pretreatment prevented seizures in all animals, but none of the pretreatments affected survival time or the onset time of cholinergic signs. These results indicate that percutaneous poisoning with VX requires additional conventional treatment in addition to the current pretreatment regimen. Decontamination of VX-exposed skin is one of the most important countermeasures to mitigate the effects of the exposure. To evaluate the window of opportunity for decontamination, the fielded skin decontaminant Reactive Skin Decontaminant Lotion (RSDL) was tested at different times in hairless guinea pigs percutaneously challenged with 4× LD50 VX in IPA. The results showed that RSDL decontamination at 15 min after exposure could not prevent progressive blood cholinesterase inhibition and therefore would still require additional treatment. A similar decontamination regimen with RSDL at 90 min showed that it still might effectively increase the time window of opportunity for treatment. In conclusion, the delay in absorption presents a window of opportunity for decontamination and treatment. The continuous release of VX from the skin presents a significant challenge for efficacious therapy, which should ideally consist of thorough decontamination and continuous treatment.

  2. SiGe-based re-engineering of electronic warfare subsystems

    CERN Document Server

    Lambrechts, Wynand

    2017-01-01

    This book equips readers with a thorough understanding of the applicability of new-generation silicon-germanium (SiGe) electronic subsystems for the military purposes of electronic warfare and defensive countermeasures. The theoretical and technical background is extensively explained and all aspects of the integration of SiGe as an enabling technology for maritime, land, and airborne (including space) electronic warfare are addressed, including research, design, development, and implementation. The coverage is supported by mathematical derivations, informative illustrations, practical examples, and case studies. While SiGe technology provides speed, performance, and price advantages in many markets, sharing of information on its use in electronic warfare systems has to date been limited, especially in developing nations. This book will therefore be warmly welcomed as an engineering guideline that focuses especially on the speed and reliability of current-generation SiGe circuits and highlights emerging innov...

  3. THE CYBER DIMENSION OF MODERN HYBRID WARFARE AND ITS RELEVANCE FOR NATO

    Directory of Open Access Journals (Sweden)

    Sorin DUCARU

    2016-06-01

    Full Text Available The technological development and the instant communication possibilities advanced not only economic and social developments, but also evolving threats from those who exploit the vulnerabilities of communication and information systems. The cyber threat landscape points to a significant increase of the frequency, intensity, duration and sophistication of cyber-attacks. One of the new and concerning trends is the use of cyber capabilities in relation with military of hybrid operations – the so-called cyber dimension of hybrid warfare. NATO’s strategy on countering hybrid warfare is based on the triad: prepare-deter-defend, which also applies to cyber. Nations represent the first line of defence in countering hybrid strategies. International cooperation is also a key factor in this sense. It is in this context that NATO’s response to cyber-attacks in the context of hybrid warfare must be further refined.

  4. Fear as a medium of communication in asymmetric forms of warfare

    DEFF Research Database (Denmark)

    Harste, Gorm

    2011-01-01

    Fear is defined as the distinction between risk and danger, a distinction that operates in communicative forms. War is always also warfare about the form of war. The article describes how fear in warfare becomes a symbolically generalized medium of communication, mainly focusing on how the form...... of fear evolves in asymmetric warfare. Asymmetric war induces fear in both parties, but in a communicative form that leads to very different experiences of fear. Fear is observed and analysed with Niklas Luhmann’s theory of self-referential systems of communication and well as his theory of risk....... Following Luhmann and in continuation of Clausewitz’ conceptual tools, yet with other means, the article proposes to observe war as a system that can de-ontologize itself and thereby concern moving centres of gravity such as communication lines, motivation, public fear as well as perceptions of risk...

  5. The United States and biological warfare: secrets from the early cold war and Korea.

    Science.gov (United States)

    Bruwer, A

    2001-01-01

    The United States and Biological Warfare is about accusations that the United States resorted to bacteriological warfare at a time of great military stress during the Korean War. In December 1951, the then US Secretary of Defense ordered early readiness for offensive use of biological weapons. Soon afterwards, the North Korean and Chinese armies accused the United States of starting a large-scale biological warfare experiment in Korea. The US State Department denied the accusation. Both parties to the dispute maintain their positions today. The authors spent 20 years researching the accusations in North America, Europe and Japan. They were the first foreigners to be given access to Chinese classified documents. The reader is also introduced to the concept of 'plausible denial', an official US policy which allowed responsible governmental representatives to deny knowledge of certain events. The authors hope that their work will contribute to the understanding of a time when modern war expanded into a new type of violence.

  6. Skeletal evidence for Inca warfare from the Cuzco region of Peru.

    Science.gov (United States)

    Andrushko, Valerie A; Torres, Elva C

    2011-11-01

    This article addresses the bioarchaeological evidence for Inca warfare through an analysis of 454 adult skeletons from 11 sites in the Inca capital region of Cuzco, Peru. These 11 sites span almost 1000 years (AD 600-1532), which allows for a comparison of the evidence for warfare before the Inca came to power (Middle Horizon AD 600-1000), during the time of Inca ascendency in the Late Intermediate Period (AD 1000-1400), and after the Inca came to power and expanded throughout the Cuzco region and beyond (Inca Imperial Period, AD 1400-1532). The results indicate that 100 of 454 adults (22.0%) showed evidence of cranial trauma. Of these, 23 individuals had major cranial injuries suggestive of warfare, consisting of large, complete, and/or perimortem fractures. There was scant evidence for major injuries during the Middle Horizon (2.8%, 1/36) and Late Intermediate Period (2.5%, 5/199), suggesting that warfare was not prevalent in the Cuzco region before and during the Inca rise to power. Only in the Inca Imperial Period was there a significant rise in major injuries suggestive of warfare (7.8%, 17/219). Despite the significant increase in Inca times, the evidence for major cranial injuries was only sporadically distributed at Cuzco periphery sites and was entirely absent at Cuzco core sites. These findings suggest that while the Inca used warfare as a mechanism for expansion in the Cuzco region, it was only one part of a complex expansion strategy that included economic, political, and ideological means to gain and maintain control. Copyright © 2011 Wiley-Liss, Inc.

  7. [Inotropic agents].

    Science.gov (United States)

    Sasayama, Shigetake

    2003-05-01

    Depression of myocardial contractility plays an important role in the development of heart failure and many inotropic agents were developed to improve the contractile function of the failing heart. Agents that increase cyclic AMP, either by increasing its synthesis or reducing its degradation, exerted dramatic short-term hemodynamic benefits, but these acute effects were not extrapolated into long-term improvement of the clinical outcome of heart failure patients. Administration of these agents to an energy starved failing heart would be expected to increase myocardial energy use and could accelerate disease progression. The role of digitalis in the management of heart failure has been controversial, however, the recent large scale clinical trial has ironically proved that digoxin reduced the rate of hospitalization both overall and for worsening heart failure. More recently, attention was paid to other inotropic agents that have a complex and diversified mechanism. These agents have some phosphodiesterase-inhibitory action but also possess additional effects, including cytokine inhibitors, immunomodulators, or calcium sensitizers. In the Western Societies these agents were again shown to increase mortality of patients with severe heart failure in a dose dependent manner with the long-term administration. However, it may not be the case in the Japanese population in whom mortality is relatively low. Chronic treatment with inotropic agent may be justified in Japanese, as it allows optimal care in the context of relief of symptoms and an improved quality of life. Therefore, each racial group should obtain specific evidence aimed at developing its own guidelines for therapy rather than translating major guidelines developed for other populations.

  8. Percutaneous needle fasciotomy for recurrent Dupuytren disease.

    Science.gov (United States)

    van Rijssen, Annet L; Werker, Paul M N

    2012-09-01

    Increasing options to treat Dupuytren disease include percutaneous needle fasciotomy (PNF), a minimally invasive technique that has proven to be effective for the treatment of primary disease. However, its effect on recurrent disease is not clear. We studied 30 patients with recurrent Dupuytren disease in 40 fingers, with a mean follow-up of 4.4 years. Primary outcome measures were total passive extension deficit reduction and interval to a second recurrence, defined as an increase of more than 30° compared with the result at the end of the previous treatment. We noted complications. Total passive extension reduction was 76%. Percutaneous needle fasciotomy was especially effective for the metacarpophalangeal joint, with an average reduction of 93%, whereas the average reduction in the proximal interphalangeal joint was 57%. A total of 50% of patients did not develop a secondary recurrence during follow-up. The other 50% did, and we treated recurrence within an average of 1.4 years after PNF. By means of PNF, we postponed tertiary treatment an average of 2.9 years starting from the initial treatment for Dupuytren disease. We successfully treated all secondary recurrences by limited fasciectomy, according to patients' wishes. We noted no major adverse effects. Percutaneous needle fasciotomy can be applied effectively for recurrent disease; 50% of patients remain free of recurrence for a mean of 4.4 years. If a secondary recurrence occurs, it does so relatively early after treatment. Patients must therefore be willing to accept this uncertainty in the context of the advantages of PNF, such as fast recovery, low complication rate, and minimal invasiveness. Copyright © 2012 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.

  9. Spondylodiscitis: a rare complication following percutaneous nephrostomy.

    Science.gov (United States)

    Chiancone, Francesco; Fedelini, Maurizio; Meccariello, Clemente; Pucci, Luigi; Fabiano, Marco; Fedelini, Paolo

    2016-11-28

    Spondylodiscitis is an inflammation of the intervertebral disc and the adjacent vertebral bodies. The spondylodiscitis can not only be a complication of medical interventions such as an operation near spinal column but also urogenital and vascular interventions and intravenous catheter use. A 71-year-old man was admitted to our emergency department with fever and severe abdominal pain. Antibiotic therapy had been performed with intravenous administration of 2 g of ceftriaxone and the patient underwent the placement of a percutaneous nephrostomy according to Seldinger technique. After 1 week, the patient experienced a severe pain at the lumbar tract of the vertebral column associated with a moderate abdominal pain and septic fever. A magnetic resonance imaging (MRI) of the lumbar spine showed widespread impregnation of the upper portion of L3 and the lower portion of L2 compressing the spinal roots as well as the ileopsoas muscle such as a spondylodiscitis. Liquor culture showed an increase of liquor immunoglobulin G, total liquor protein and was positive for Extended-spectrum beta-lactamases (ESBL) - producing Escherichia coli. After the antibiotic therapy, the spondylodiscitis resolves without important sequelae. In the present case report, we describe a very rare complication of percutaneous nephrostomy tube placement, despite of the prophylactic antibiotic therapy according to the most recent guidelines. Predisposing factors to spondylodiscitis include the very young and elderly, the immunosuppressed, diabetic individuals and a general debilitating disease such as renal failure. This case suggests the importance of remembering spondylodiscitis when septic fever and back pain occurs following the placement of a percutaneous nephrostomy in a septic patient.

  10. Emergency percutaneous needle decompression for tension pneumoperitoneum

    Directory of Open Access Journals (Sweden)

    Körner Markus

    2011-05-01

    Full Text Available Abstract Background Tension pneumoperitoneum as a complication of iatrogenic bowel perforation during endoscopy is a dramatic condition in which intraperitoneal air under pressure causes hemodynamic and ventilatory compromise. Like tension pneumothorax, urgent intervention is required. Immediate surgical decompression though is not always possible due to the limitations of the preclinical management and sometimes to capacity constraints of medical staff and equipment in the clinic. Methods This is a retrospective analysis of cases of pneumoperitoneum and tension pneumoperitoneum due to iatrogenic bowel perforation. All patients admitted to our surgical department between January 2005 and October 2010 were included. Tension pneumoperitoneum was diagnosed in those patients presenting signs of hemodynamic and ventilatory compromise in addition to abdominal distension. Results Between January 2005 and October 2010 eleven patients with iatrogenic bowel perforation were admitted to our surgical department. The mean time between perforation and admission was 36 ± 14 hrs (range 30 min - 130 hrs, between ER admission and begin of the operation 3 hrs and 15 min ± 47 min (range 60 min - 9 hrs. Three out of eleven patients had clinical signs of tension pneumoperitoneum. In those patients emergency percutaneous needle decompression was performed with a 16G venous catheter. This improved significantly the patients' condition (stabilization of vital signs, reducing jugular vein congestion, bridging the time to the start of the operation. Conclusions Hemodynamical and respiratory compromise in addition to abdominal distension shortly after endoscopy are strongly suggestive of tension pneumoperitoneum due to iatrogenic bowel perforation. This is a rare but life threatening condition and it can be managed in a preclinical and clinical setting with emergency percutaneous needle decompression like tension pneumothorax. Emergency percutaneous decompression is no

  11. Percutaneous acetabuloplasty for metastatic acetabular lesions

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    Logroscino Giandomenico

    2008-05-01

    Full Text Available Abstract Background Osteolytic metastases around the acetabulum are frequent in tumour patients, and may cause intense and drug-resistant pain of the hip. These lesions also cause structural weakening of the pelvis, limping, and poor quality of life. Percutaneous acetabuloplasty is a mini-invasive procedure for the management of metastatic lesions due to carcinoma of the acetabulum performed in patients who cannot tolerate major surgery, or in patients towards whom radiotherapy had already proved ineffective. Methods We report a retrospective study in 25 such patients (30 acetabuli who were evaluated before and after percutaneous acetabuloplasty, with regard to pain, mobility of the hip joint, use of analgesics, by means of evaluation forms: Visual Analog Scale, Harris Hip Score, Western Ontario and McMaster Universities Index of Osteoarthritis (WOMAC, Eastern Cooperative Oncology Group (ECOG. The results obtained were analysed using the χ2 Test and Fisher's exact test. Significance was sent at P Results Marked clinical improvement was observed in all patients during the first six post-operative months, with gradual a worsening thereafter from deterioration of their general condition. Complete pain relief was achieved in 15 of our 25 (59% of patients, and pain reduction was achieved in the remaining 10 (41% patients. The mean duration of pain relief was 7.3 months. Pain recurred in three patients (12% between 2 weeks to 3 months. No major complications occurred. There was transient local pain in most cases, and 2 cases of venous injection of cement without clinical consequences. Conclusion Percutaneous acetabuloplasty is effective in improving the quality of life of patients with osteolytic bone tumours, even though the improvement is observed during the first 6 months only. It can be an effective aid to chemo- and radiotherapy in the management of acetabular metastases.

  12. Long-Term Results of Percutaneous Management of Liver Hydatid Cysts: - Experience of a University Hospital in Endemic Region –

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    Younès Cherradi

    2016-12-01

    Full Text Available Background and objective: Surgery was considered for years the standard treatment for all stages of liver hydatid cysts (LHC. Percutaneous treatment has becomes a fast, reliable and more efficient method in selected cases. The purpose of this study is to evaluate the effectiveness of percutaneous treatment of LHC on the basis of our department long-term results. Patients and Methods: This study includes all patients who benefited from percutaneous treatment for LHC from December 1998 to April 2012. Puncture aspiration, injection, and re-aspiration (PAIR were used for hydatid cysts smaller than 6 cm. Larger cysts, infected cysts and those with biliary fistula were treated by puncture associated to drainage (PA-PD. Absolute alcohol was used as sclerosing agent. Reduction of the size of the cyst more than 50%, pseudo-tumour echo pattern and disappearance of the cyst at the follow-up were retained as criteria of treatment efficacy. Results: Two hundred thirty patients (136 female and 94 male; mean age: 35 years old with 278 LHC underwent percutaneous treatment. Mean initial cyst diameter was 76.8 mm [20-180 mm]. According to Gharbi’s classification, types I and II LHC accounted for 74% and 25% respectively. Fourteen patients (6% presented with an infected cavity and 27 patients (12% had a biliary fistula at diagnosis (12%. PA-PD was initially performedin 23 patients. No mortality, abdominal dissemination, or tract seeding occurred. Minor complications like urticaria, cutaneous rash and fever were reported in 24 patients (10%. One case of anaphylactic shock was reported with good evolution. Mean hospitalization time was 3 days ± 1.5 for uncomplicated cases and 16.5 days± 4.2 for complicated cases. 229 out of 230 patients were cured, whereas one recurrence has been reported. Conclusion: Percutaneous treatmentis efficient and safe and offers complete cure in selected patients with the advantage of short hospitalization.

  13. Rationale for Percutaneous Intervention of CTO.

    Science.gov (United States)

    Waram, Kethes C; Willis, Nicholas P; Girotra, Sudhakar; Shaker, Rimon L; Pershad, Ashish

    2012-07-01

    Chronic total occlusion accounts for 15% of cases during diagnostic angiography with higher referral rate to surgical revascularization. With contemporary strategies and techniques, the success rate with experienced operators can exceed 90%. Currently available observational studies in carefully selected patient populations show evidence of a trend toward symptom relief; improvement in quality of life, left ventricular function, and mortality; and improved tolerance toward future ischemic events. Lack of randomized controlled trials comparing current optimal medical management with percutaneous coronary intervention for chronic total occlusion is a major barrier to widespread adaptation of this advanced complex interventional technique. Copyright © 2012 Elsevier Inc. All rights reserved.

  14. Percutaneous catheter dilatation of carotid stenoses

    Energy Technology Data Exchange (ETDEWEB)

    Mathias, K.; Mittermayer, C.; Ensinger, H.; Neff, W.

    1980-09-01

    Thirty-one carotid artery stenoses were produced in thirty dogs by three different techniques. Twenty-three of these could be cured by transfemoral percutaneous catheter dilatation. High grade tight stenoses may present resistance which cannot be overcome by the catheter. Histological examination of the dilated vessels showed circumscribed changes in the vessel wall, with destruction of elastic membranes. From our experience of catheter dilatation of pelvic and lower limb arteries and of renal arteries, we consider it feasible to use this technique in selected patients with carotid stenosis.

  15. Percutaneous nephrolithotomy and ureteroscopy in children: evolutions.

    Science.gov (United States)

    Long, Christopher J; Srinivasan, Arun K

    2015-02-01

    The increasing incidence of pediatric stone disease has coincided with significant advances in technology and equipment, resulting in drastic improvements in management. Miniaturization of both ureteroscopes and percutaneous nephrolithotomy (PCNL) equipment has facilitated access to the entirety of the urinary tract and has made ureteroscopy a first-line therapy option along with shock-wave lithotripsy for kidney and ureteral stones. Advances in PCNL have decreased patient morbidity while preserving stone clearance rates. In this review, the advances in operative approach for ureteroscopy and PCNL in children and its applicability to current surgical management of pediatric stone disease are discussed.

  16. Percutaneous treatment of lumbar disc herniation

    Energy Technology Data Exchange (ETDEWEB)

    Leonardi, M.; Resta, F.; Bettinelli, A. [Ospedale Maggiore di Milano (Italy); Lavaroni, A.; Fabris, G. [Ospedale Civile di Udine (Italy); Abelli, F. [Fondazione Clinica del Lavorno, Pavia (Italy)

    1994-12-31

    918 patients were subjected to percutaneous treatment of lumbar herniated disc. 733 of these were treated through enzymatic nucleolysis with chymopapain, for a total 883 levels. Chemonucleolysis was carried out on 733 patients (79.8%). Automated discectomy has been carried out in 185 cases (20.1%). Chemonucleolysis has led to the resolution of the symptoms in a high percentage of cases (82.2%). Nucleotomy has proved to be an effective method in 74.6% of cases. (author). 7 refs, 6 figs, 1 tab.

  17. Percutaneous renal puncture: requirements and preliminary results

    CERN Document Server

    Leroy, A; Payan, Y; Richard, F; Chartier-Kastler, E; Troccaz, J; Leroy, Antoine; Mozer, Pierre; Payan, Yohan; Chartier-Kastler, Emmanuel; Troccaz, Jocelyne

    2002-01-01

    This paper introduces the principles of computer assisted percutaneous renal puncture, that would provide the surgeon with an accurate pre-operative 3D planning on CT images and, after a rigid registration with space-localized echographic data, would help him to perform the puncture through an intuitive 2D/3D interface. The whole development stage relied on both CT and US images of a healthy subject. We carried out millimetric registrations on real data, then guidance experiments on a kidney phantom showed encouraging results.

  18. Sunscreening Agents

    Science.gov (United States)

    Martis, Jacintha; Shobha, V; Sham Shinde, Rutuja; Bangera, Sudhakar; Krishnankutty, Binny; Bellary, Shantala; Varughese, Sunoj; Rao, Prabhakar; Naveen Kumar, B.R.

    2013-01-01

    The increasing incidence of skin cancers and photodamaging effects caused by ultraviolet radiation has increased the use of sunscreening agents, which have shown beneficial effects in reducing the symptoms and reoccurrence of these problems. Many sunscreen compounds are in use, but their safety and efficacy are still in question. Efficacy is measured through indices, such as sun protection factor, persistent pigment darkening protection factor, and COLIPA guidelines. The United States Food and Drug Administration and European Union have incorporated changes in their guidelines to help consumers select products based on their sun protection factor and protection against ultraviolet radiation, whereas the Indian regulatory agency has not yet issued any special guidance on sunscreening agents, as they are classified under cosmetics. In this article, the authors discuss the pharmacological actions of sunscreening agents as well as the available formulations, their benefits, possible health hazards, safety, challenges, and proper application technique. New technologies and scope for the development of sunscreening agents are also discussed as well as the role of the physician in patient education about the use of these agents. PMID:23320122

  19. Female rats are less susceptible during puberty to the lethal effects of percutaneous exposure to VX

    Directory of Open Access Journals (Sweden)

    Linnzi K.M. Wright

    2016-01-01

    Full Text Available Nerve agents with low volatility such as VX are primarily absorbed through the skin when released during combat or a terrorist attack. The barrier function of the stratum corneum may be compromised during certain stages of development, allowing VX to more easily penetrate through the skin. However, age-related differences in the lethal potency of VX have yet to be evaluated using the percutaneous (pc route of exposure. Thus, we estimated the 24 and 48 h median lethal dose for pc exposure to VX in male and female rats during puberty and early adulthood. Pubescent, female rats were less susceptible than both their male and adult counterparts to the lethal effects associated with pc exposure to VX possibly because of hormonal changes during that stage of development. This study emphasizes the need to control for both age and sex when evaluating the toxicological effects associated with nerve agent exposure in the rat model.

  20. Mobile Agents

    Science.gov (United States)

    Satoh, Ichiro

    Mobile agents are autonomous programs that can travel from computer to computer in a network, at times and to places of their own choosing. The state of the running program is saved, by being transmitted to the destination. The program is resumed at the destination continuing its processing with the saved state. They can provide a convenient, efficient, and robust framework for implementing distributed applications and smart environments for several reasons, including improvements to the latency and bandwidth of client-server applications and reducing vulnerability to network disconnection. In fact, mobile agents have several advantages in the development of various services in smart environments in addition to distributed applications.