Breath Alcohol Rapid Test (DTS594)

Regulatory status: For research use only, not for use in diagnostic procedures.

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exhaled breath
Intended Use
The Breath Alcohol Detector is for rapid detection of the presence of alcohol in the exhaled breath and indicates relative BAC at 0.02%, 0.05%, or 0.08% cut-off levels. It is a screening test that provides a reliable method and warning to help prevent drunk driving due to an impairment of judgment.
Store as packaged in the sealed pouch either at room temperature or refrigerated ranging from 2-30°C (36-86°F). The test is stable through the expiration date printed on the sealed pouch. The test must remain in the sealed pouch until use. DO NOT FREEZE.


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Synthesis of macrocyclic poly(alpha-hydroxyl acids) via DABCO-mediated ROP of O-carboxylanhydrides derived from l-phenylalanine even in the presence of an alcohol


Authors: Liang, Jinpeng; Yin, Ting; Han, Song; Yang, Jing

Cyclic polyesters with very interesting topologies and unique properties have great potential. However, the synthesis of cyclic polyesters via ring-opening polymerization (ROP) of O-carboxyanhydrides (OCAs) has been hardly reported to date. Herein, a simple combination of triethylboron (TEB) and 1,4-diazabicyclo-[2.2.2]octane (DABCO) in the presence of benzyl alcohol (BnOH) was explored to promote the ROP of l-phenyl O-carboxyanhydride (l-PheOCA) for the synthesis of well-defined cyclic poly(alpha-hydroxy acid)s (PAHAs). Such a ternary catalytic system was found to exhibit well-controlled and living catalytic activities for l-PheOCA, and the polymerization produced cyclic PAHAs with a narrow molecular weight distribution (M-w/M-n < 1.2) and the isotacticity of P-m = 0.83. Careful analysis of the catalytic system showed the interaction of DABCO, TEB, and BnOH. Combined with the kinetic experiments, it was deduced that DABCO with preferable nucleophilicity played a predominant role in the polymerization process, and BnOH acted as a cocatalyst, not as an initiator during the polymerization. The zwitterionic active species with DABCO at one end and an alkyloxide at the other end of the propagation chain was involved in the synthesis of cyclic PAHAs. The thermal properties of the resulting polymers were analyzed by DSC and TGA, respectively. The degradation temperature of cyclic PAHAs was 30 degrees C higher than that of the corresponding linear polymers, exhibiting much better thermal stability. This is the first work on cyclic PAHAs fabricated via ROP of OCAs, which provides one new way to synthesize cyclic PAHAs and has significant potential to enrich the diversity of cyclic PAHAs.

Preventing the problem behaviour: the case with Ukrainian vocational high school students


Authors: Bartosh, Olena; Kozubovskyi, Rostyslav; Shandor, Fedir; Tovkanets, Oksana

The paper`s purpose is to identify the characteristics of deviant behaviour among Ukrainian vocational high school students using criteria based on quantitative data to determine the effectiveness of implementing targeted preventive social-pedagogical and psychological programmes. According to medical-psychological, educational, social (behavioural) and culturologically valuable criteria of predisposition to deviant behaviour, the most typical displays of deviant behaviour were defined: the use of alcohol, drugs, tobacco smoking; frequent cutting of classes, poor performance; committing of offences, crimes; low level of general and communication culture, inability to organize productive leisure. The programme of preventive work was compiled based on principles of personification, motivation, informed social choice of action, positive realization of an individual in a group. Its effectiveness was proved by the defined criteria. The number of students in the experimental group with: high level of predisposition to deviant behaviour decreased by 17.6%; average - increased by 8.1%; low - increased by 9.5%.

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