• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2012.04a
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• pp.349-352
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• 2012

본 연구에서는 주택화재가 발생할 경우, 건축용 외장재로부터 발생하는 유해성 가스를 분석하고자 주택화재재연실험을 수행하였다. 실험 방법으로는 스티로폼, 우레탄폼, 글라스울 소재의 샌드위치 패널을 대상으로 KS F 2271 규격을 이용한 실험용 생쥐의 생체반응을 실험하였으며, NES 713을 이용한 독성가스에 대한 분석을 실시하였다. 샌드위치패널에서 발생하는 대표적인 유해성 가스는 시안화수소와 일산화탄소이며, 그 중에서 가장 유독한 것은 시안화수소로서 2차 세계대전 당시 유대인 학살에 사용된 독가스인데 시안화수소를 사람이 흡인한 경우 750ppm 이상이면 즉사하며, 375ppm 이상이면 30분 내에 사망하는 것으로 알려져 있다.

• Journal of Applied Biological Chemistry
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• v.54 no.3
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• pp.214-217
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• 2011

Fumigant, methyl bromide which is used in most countries for plant quarantine, has been designated and under control as ozone depleting substance. For developing alternative chemicals for methyl bromide, many countries have been intensifying their capacity. This study was carried out to investigate the residue patterns of hydrogen cyanide which is commonly used for plant quarantine. Hydrogen cyanide was treated onto the orange, banana, and pineapple at recommended and double doses and then sampling was done at 1 and 3 day after fumigation treatment. Residue of hydrogen cyanide was found safe because average residue levels on orange, banana, and pineapple after 3 days of fumigation treatment were $0.57{\pm}0.05$, $0.21{\pm}0.17$, and $0.41{\pm}0.08$ ppm, which were lower than the MRLs of Korea (5 ppm), Japan (5 ppm), USA (50 ppm), and Canada (25 ppm). Hydrogen cyanide are expected to be used as alternative chemicals for methyl bromide fumigant for orange, banana, and pineapple.

• 월간산업보건
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• s.94
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• pp.32-35
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• 1996

• The Safety technology
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• no.117
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• pp.82-85
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• 2007

• Journal of the Korean Chemical Society
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• v.40 no.3
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• pp.187-195
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• 1996

Ab initio SCF calculations have been carried out for the five conceivable trimers formed between one hydrogen cyanide and two hydrogen fluorides using a basis set of TZ＋P quality. Several ground state properties of these trimeric complexes have been evaluated, and compared with those of isolated monomers and appropriate dimers. Computed equilibrium geometries, stabilization energies, and dipole moments are given in order to suppliment the available experimental data. At this level of approximation, intramolecular bond distances are consistently shorter than experimental ones. However, intermolecular distances upon complex formation, and dipole moments are overestimated compared with experimental ones. HCN$(HF)_2$ trimer appears to be the most favourable among the five kinds of trimer complex, and also more stable than $(HCN)_2HF$. The typical features of the non-additivity of intermolecular interaction are relatively strong in the HCN$(HF)_2$ trimer.

• 산업보건소식
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• no.47
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• pp.25-26
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• 1987

산업이 다양화.고도화됨에 따라 생산공정중에 불가피하게 발생되는 수많은 유해물질의 포집, 분석 방법에 대하여 우리실정에 알맞는 표준방법을 정함으로써 사업장 유해환경측정에 참고가 되고 나아가서 작업환경측정방법의 일원화를 도모하고자 노동부 국립노동과학연구소에서 수년간에 걸쳐 비교 연구하여 최근 보고한 바 있는 유해물질의 표준 실험 방법을 소개하고자 한다.

• Applied Chemistry for Engineering
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• v.8 no.3
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• pp.438-445
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• 1997

${\beta}-PbO_2$ electrode, which was electrodeposited on Ti madras, was prepared and for the decomposition of cyanide in electroplating wastewater. After the investigation of temperature and pH conditions for no hydrogen cyanide evolution during the decomposition of cyanide, the optimum current densities of ${\beta}-PbO_2$ electrodeposition and cyanide decomposition were determined in 500ppm NaCN solution, and durability of ${\beta}-PbO_2$ electrode was also investigated. Hydrogen cyanide was actively generated above $40^{\circ}C$ and was not evolved above pH 13. ${\beta}-PbO_2$ electrode electodeposited at $5A/dm^2$ showed the best cyanide decomposition efficiency The decompostion efficiency was about 70% at low decomposition current density ($0.08A/dm^2$), and it decreased gradually to about 10% as the decomposition current density increased up to $4A/dm^2$. The film of ${\beta}-PbO_2$ electrodeposited was corrosive at $20A/dm^2$ and was broken at $50A/dm^2$.

• Analytical Science and Technology
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• v.29 no.2
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• pp.73-78
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• 2016

Hydrogen cyanide (HCN) is an extremely toxic gas frequently produced during the incineration of plastics, such as acrylonitrile-butadiene-styrene (ABS). A victim of a fire who has inhaled smoke could have cyanide in the blood. Therefore, cyanide could be a good marker for a post-mortem examination of a fire as well as carboxyhemoglobine (COHb) test of blood samples. For a particular fire case, a burned body with a suicide note was found inside a burned vehicle. Even though the COHb value is conclusive evidence, measuring the COHb for denatured blood might be difficult due to severe thermal denaturation or the formation of methemoglobin (MetHb). To overcome this difficulty, cyanide could be used as an indicator when investigating the death of a fire victim. In this study, gas chromatography/mass spectrometry (GC/MS) was adopted to measure the levels of cyanide in the blood through derivatization with pentafluorobenzyl bromide (PFBBr) under cation surfactant by scan and SIM mode. The concentration of cyanide in the blood of heart blood and brain of the victim was found to be 0.36 µg/mL and 1.20 µg/mL respectively, which was higher than the average value (0.041 µg/mL) found in the blood of 14 people who smoked.

• Journal of the Korean Chemical Society
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• v.17 no.4
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• pp.275-285
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• 1973

The addition of one mole of aluminum chloride to three moles of sodium borohydride in tetrahydrofuran gives a turbid solution with enormously more powerful reducing properties than those of sodium borohydride itself. The reducing properties of this reagent were tested with 49 organic compounds which have representative functional groups. Alcohols liberated hydrogen immediately but showed no sign of hydrogenolysis of alkoxy group. Aldehydes and ketones were reduced rapidly within one hr. Acyl derivatives were reduced moderately, however, carboxylic acids were reduced much more slowly. Esters, lactones and epoxides were reduced readily than sodium borohydride or borane. Tertiary amide was reduced slowly, however, primary amide consumed one hydride for hydrogen evolution but reduction was sluggish. Aromatic nitrile was reduced much more readily than aliphatic nitrile. Nitro compounds were inert to this reagent but azo and azoxy groups were slowly attacked. Oxime was reduced slowly but isocyanate was only partially reduced. Disulfide and sulfoxide were attacked slowly but sulfide and sulfone were inert. Olefin was hydroborated rapidly.

• Applied Chemistry for Engineering
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• v.4 no.2
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• pp.254-263
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• 1993

The industry of amino acids has developed for the synthetic methods, zymotechnics from the methods of extraction. In the present, part of amino acids (L-cystine, L-tyrosine, etc.) is manufactured by the methods of extraction, but most of amino acids is produced by synthetic methods, zymotechnics. Among the methods, the synthetic methods use of cyanic acid, which generate a large of waste water by acid or alkali in hydrolysis. In this point of view, improved new synthetic methods are demanded for being the influence of environment. This article Introduces new synthetic methods of phenyl alnine, further more, the recent of research results are introduced to prepare the derivative ${\alpha}-keto$ acids of precursor for preparing more than particular amino acids.