scholarly journals OPCW Proficiency Test: A Practical Approach Also for Interlaboratory Test on Detection and Identification of Pesticides in Environmental Matrices

2014 ◽  
Vol 2014 ◽  
pp. 1-25 ◽  
Author(s):  
Leszek Konopski ◽  
Pingfeng Liu ◽  
Wuri Wuryani ◽  
Maciej Śliwakowski
Keyword(s):  
Proficiency Test ◽  
Organophosphorus Compounds ◽  
General Strategy ◽  
Chemical Weapon ◽  
Environmental Matrices ◽  
Chemical Weapon Convention ◽  
Interlaboratory Test ◽  
Detection And Identification ◽  
Standard Procedures

An overview of general strategy, standard procedures, and critical points, which may be found during carrying out an OPCW Proficiency Test concerning detection and identification of scheduled compounds relevant to Chemical Weapon Convention, has been presented. The observations have been illustrated following the case of the Eight OPCW Designated Laboratories Proficiency Test, which was performed in the OPCW Laboratory in Rijswijk in November and December 2000. Various useful hints, comments, and practical observations concerning the case study have been included as well. The same methodology and procedures may be also applied for detection, identification, and environmental analyses of pesticides and biocides, especially organophosphorus compounds.

scholarly journals Participation on official proficiency test of the OPCW: case study of Brazilian Army – IDQBRN

2018 ◽  
Vol 975 ◽  
pp. 012016
Author(s):  
T C Silva ◽  
C N Ferreira ◽  
M Cardozo ◽  
R L de Paula
Keyword(s):  
Proficiency Test

scholarly journals Is there a Relationship between Critical Thinking and Critical Reading of Literary Texts: A Case Study at Arak University (Iran)

2014 ◽  
Vol 33 ◽  
pp. 63-76 ◽  
Author(s):  
Hamedreza Kohzadi ◽  
Fatemeh Aziz Mohammadi ◽  
Fatemeh Samadi
Keyword(s):  
Critical Thinking ◽  
Proficiency Test ◽  
Literary Work ◽  
Literary Texts ◽  
Critical Reading ◽  
Male And Female ◽  
Efl Learners ◽  
Female Data ◽  
The Subject

Examining the theme, plot, and characters of a literary work is a common practice for students of literature so that they can criticize literature. Unlike a non-critical reading which provides readers only with facts, a critical reading also entails depicting how a book or a source illustrates the subject matter. Through various reading procedures including interpretation, inference and examining ideologies embedded in texts, readers can develop critical thinking. This paper aims at examining whether or not there is a relationship between critical thinking and critical reading of literary texts in higher education. To meet the mentioned aim, 121 EFL learners from Arak University were invited to participate in this study. After administrating English proficiency test, total numbers of students were 98 male and female. Data analysis was done through employing ANOVA and T-test.

scholarly journals On site inspection for nuclear test ban verirication

1994 ◽  
Vol 37 (3) ◽  
Author(s):  
P. D. Marschall
Keyword(s):  
Nuclear Explosion ◽  
Nuclear Test ◽  
The Political ◽  
Chemical Weapon ◽  
Nuclear Explosions ◽  
Chemical Weapon Convention ◽  
On Site Inspection ◽  
Test Ban ◽  
Nuclear Test Ban ◽  
Test Ban Treaty

The problem of verifying compliance with a nuclear test ban treaty is mainly a technical one. However the problem of detecting, locating and identifying nuclear explosions has, since the late 1950s, been intimately involved with the political problems associated with negotiating a treaty. In fact there are few other areas in which policy, diplomacy and science have been so interwoven. This paper attempts to illustrate how technology can. be applied to solve some of the political problems which arise when considering the role of an On Site Inspection (OSI) to determine whether or not a nuclear explosion, in violation of a treaty, has occurred or not. It is hoped that the reader, with a scientific background, but with little or no experience of treaty negotiations, will gain an. insight as to how technical matters can interact with political requirements. The demands made on scientists to provide technical support for negotiating and rnonitoring compliance of a treaty have increased significanfly over the last 40 years. This is a period in which a number of major treaties have contained a significant technical component e.g. the Limited Test Ban Treaty (Threshold Treaty) and the Chemical Weapon Convention. This paper gives an indication of some of the political decisions which will have to be made and suggests some of the technical methods which are of value in the identification of a clandestine nuclear explosion.

scholarly journals Analysis Of The Failure Of Organizations For Prohibited of Chemical Weapon (OPCW) As The Organization For Disarmament On The Conflict Of Syria

2018 ◽  
Vol 4 (1) ◽  
pp. 61
Author(s):  
Denik Iswardani Witarti ◽  
Anggun Puspitasari
Keyword(s):  
International Organization ◽  
Chemical Weapons ◽  
Chemical Weapon ◽  
Chemical Weapon Convention ◽  
Study Results ◽  
Terrorist Groups ◽  
State Actors ◽  
Syrian Conflict ◽  
Failure Factors

<p>This paper analyzes the failure of the Organization for Prohibited of Chemical Weapon (OPCW) in handling chemical weapon disarmament in Syria. The use of chemical weapons by the Syrian government against its own citizens poses a challenge for OPCW in its role to ban the use and development of chemical weapons worldwide. OPCW itself formed in 1997 is an implementation of Chemical Weapon Convention (CWC) in 1993. The main problem of this study is OPCW failure factors to ban the use and development of chemical weapons in Syrian conflict. The study results show that the chemical weapon disarmament efforts in Syria by the OPCW by sending and destroying government-owned chemical weapons has failed. Although OPCW has claimed Syria has been freed from chemical weapons, it is still encountered the use of chemical weapons by ISIS terrorist groups and unofficial opposition groups. In conclusion, the role of the OPCW according to the concept of disarmament and the international organization is still not fully successful. OPCW is only able to detect the use of chemical weapons committed by the Syrian government. This organization has no authority in overcoming the problem of the misused chemical weapons committed by non-state actors.</p><p><span>Keywords: Chemical weapons, Syrian conflict, OPCW, Disarmament. </span><br /><span> </span></p>

scholarly journals Psychiatric Sequelae of Organophosphorous Poisoning: A Case Study and Review of the Literature

1994 ◽  
Vol 7 (3-4) ◽  
pp. 117-122 ◽  
Author(s):  
R. H. Bradwell
Keyword(s):  
Affective Disorder ◽  
Organophosphorus Compounds ◽  
Bipolar Affective Disorder ◽  
Review Of The Literature ◽  
Farm Worker ◽  
Organic Psychosis ◽  
Clinical Observations ◽  
Research Findings ◽  
Psychiatric Sequelae

This is the case of a young farm worker presenting with episodes of acute organic psychosis superimposed on a state of chronic anergy and hypersomnia. It is suggested that he developed an encephalopathic illness presenting with an organic bipolar affective disorder as a result of organophosphate exposure. In proposing this aetiology, an hypothesis is developed which links clinical observations and investigative results with research findings in relation to organophosphorus compounds and neuropharmacology.

scholarly journals Detection of Chemical Weapon Agents Using Spectroscopic Probes: A Computational Study

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Letícia S. Braga ◽  
Érika F. Silva ◽  
Daiana T. Mancini ◽  
Eduardo P. da Rocha ◽  
Elaine F. F. da Cunha ◽  
...  
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Organophosphorus Compounds ◽  
Computational Study ◽  
Theoretical Calculations ◽  
Spectroscopic Properties ◽  
Acetylcholinesterase Inhibition ◽  
Chemical Weapon ◽  
Fast Detection ◽  
Absorption Wavelength

Organophosphorus compounds are organic compounds widely employed in agriculture as well as in chemical weapons. The use in agriculture is due to their insecticidal properties. However, in chemical warfare, the use of organophosphorus is associated with acetylcholinesterase inhibition, which promotes the cholinergic syndromes. In this line, the fast detection of this class of compound is crucial for the determination of environmental exposure. This improved detection will naturally allow for more prompt courses of treatment depending on the contaminant findings. In this perspective, the dipyrrinone oxime (1) was employed for the detection of organophosphorus compounds that are employed as nerve agents, such as cyclosarin, sarin, soman, diethyl chlorophosphate, diisopropylfluorophosphate, 2-(dimethylamino)ethyl N,N-dimethylphosphoramidofluoridate, O-ethyl-S-[2-(diethylamino)ethyl]methylphosphonothioate, O-ethyl-S-[2(diisopropylamino)ethyl] methylphosphonothioate, and O,O-diethyl-S-[2-(diethylamino)ethyl] phosphorothioate, through fluorescent emission. The thermodynamics and kinetic parameters as well as spectroscopic properties of the complexes formed for 1 and all organophosphorus compounds previously cited were investigated by means of theoretical calculations. From our findings, only the diethyl chlorophosphate, 2-(dimethylamino)ethyl N,N-dimethylphosphoramidofluoridate, and O,O-diethyl-S-[2-(diethylamino)ethyl] phosphorothioate emitted fluorescence in the hexane, toluene, chloroform, dichloromethane, methanol, acetonitrile, water, and dimethyl sulfoxide solvents. The study of the absorption wavelength with the most polar solvent showed higher values compared to apolar solvents. In the same solvent, for instance, soman in hexane showed the lowest absorption wavelength value, 324.5 nm, and DCP the highest value, 330.8 nm. This behavior was observed in other tested solvents. The thermodynamic parameters indicate negative Gibbs free energy (ΔG) values for the O-ethyl-S-[2(diisopropylamino)ethyl] methylphosphonothioate with 1 reaction. On the other hand, the sarin and cyclosarin revealed the lowest Gibbs free energy (ΔG‡) values, being kinetically favorable and presenting more reactivity.

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