• 한국응용과학기술학회지
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• 제20권4호
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• pp.353-357
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• 2003

Sodium azide (SA) is commonly used as propellant for inflating automatic safety bags and other chemical manufacturing purposes. The investigation of potentially thermal hazard of sodium azide and its mixture with polymers are very important because it can occur an expected traffic accident so we took a experiment s using different scanning calorimeter (DSC) in nitrogen atmosphere. The decomposition temperature were about $350{\sim}450^{\circ}C$. We could find not only exothermic reaction was remarkably decreased in mixture s of acrylonitrile-butadiene-styrene (ABS) and polyvinyl chloride (PVC), but also increasing mixed rate of ABS, polyvinyl alcohol (PVA) and polymethyl methacrylate (PMMA) decreased thermal decomposition heat.

• 한국안전학회지
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• 제11권4호
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• pp.97-106
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• 1996

Some of accidents are based on unstable chemical substances. These chemicals are easily decomposed or Ignited by heats or mechanical shocks like sodium azide. Sodium azide is commonly used as propellant for inflating automotive safety bags and the other chemical manufacturing purposes. The investigation of thermal hazard potential of sodium azide is very important because unexpected traffic accident can be occureed. The experiments were carried out by DSC, TG an ARC in air, oxygen, argon and nitrogen atmosphere. The decomposition temperatures were about $410^{\circ}C$~$420^{\circ}C$ by DSC and $330^{\circ}C$~$370^{\circ}C$ by ARC, this is very significant result for treatment of chemical. The heats of decomposition were about 81 kcal/mol in ai. and 10 kcal/mol in other atmosphere.

• 한국식품위생안전성학회지
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• 제26권3호
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• pp.222-226
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• 2011

본 연구는 세포 내 기생세균인 S. typhimurium의 세포 내 대사과정에서 중요한 역할을 하는 respiratory nitrate reductase의 활성 및 활성 억제 물질인 sodium chlorate, sodium azide, 그리고 sodium cyanide으로 조성된 복합조성물을 이용하여 RAW 264.7 세포에 감염 된 S. typhimurium의 증식억제 효과와, S. typhimurium 감염 마우스에 대한 치료효과를 평 가하기 위하여 수행되었다. 복합조성물을 이용하여 RAW 264.7 세포 감염 S. typhimurium에 대한 증식억제 효과 확인시험을 수행한 결과, 세포 배양 24시간에 대조군과 비교하여 90% 이상의 S. typhimurium의 증식이 억제되었다. 또한, S. typhimurium을 감염시킨 마우스에 복합조성물을 투여한 결과, 70%의 높은 생존율을 보였다. 따라서 본 연구의 결과로부터, sodium chlorate, sodium azide, sodium cyanide로 조성된 복합조성물을 S. tyhimurium에 감염된 마우스에 투여할 경우 S. typhimurium의 증식을 억제하여 감염증상을 치료할 수 있을 것으로 기대된다.

• Journal of Ginseng Research
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• 제17권3호
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• pp.232-235
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• 1993

We investigated the effect of antioxidants (ascorbate, glutathione, and sodium azide), which efEectively inhibited the chlorophyll bleaching of Panax ginseng CA Meyer under the high light intensity, treated by folilar wiping on the early stage of photosynthesis and transpiration of ginseng in the 5000 $\mu$mol photon.$m^{-2}$.$s^{-1}$. Ascorbate and glutathione, endogenous antioxidant, completely recovered ginseng from the photoinhibition, but sodium azide, synthetic quencher, showed negative effect. We assumed that endogenous antioxidants could be available to the protection of the leaf-burning phenomenon of ginseng.

• 공업화학
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• 제32권2호
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• pp.224-227
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• 2021

A rapid and selective copper-catalyzed amination of aryl halides with sodium azide was established by using 10 mol % of CuI, and 20 mol % of N,N'-dimethylethylenediamine in DMSO under microwave irradiation for 10 min. The catalytic system with 4-substituted aryl iodides was found to be the most effective leading to a nearly complete conversion.

• Bulletin of the Korean Chemical Society
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• 제21권8호
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• pp.797-800
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• 2000

The reaction of o-acylthiophenacyl chloride 5a with onc equivalent ofsodium azide in aqueous acetone at-10~ $-5^{\circ}C$ gave 2,9-dimethyl-6H,I3H-dibenzo[d,i][1,6]dithiecin-7,14-dione 7(10%),acyclic dimer 8(64%),and tri-mer 9 (8%). Dimer 8 and trimer 9 we re converted readily to 7 under the similar conditions at room temperature in yields of 72% and 53%,respectivel. Also, one pot synthesis of 7 (64%, 45%) from the reaction of 5a or 5b with two equivalents of sodium azide at room temperature was very successful.

• 한국식품조리과학회지
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• 제11권4호
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• pp.351-355
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• 1995

용매(MeOH, EtOH, CHCI$_{3}$/MeOH Water)를 달리한 마추출물의 broiling과 panfrying의 조리법 변이원과 2-AF, benzo(a)pyrene, sodium azide 등의 화학적으로 유도된 순수변이원에 대한 억제효과를 검색하였다. 대사활성물질인 S9 mixture 무첨가시 조리법 변이원에 대한 변이원과 용매종류 및 변이원과 용매사이의 상호관계성은 유의적인 차이를 보였으나, S9 mixture 첨가시에는 변이원, 마, 용매종류들사이 에 유의성을 보였다. 특히 S9 mixture 첨가시 높은 억제효과를 보였던 산마 EtOH 추출물은 panfrying 변이원에 대한 억제효과는 컸으나 조리법 변이원에 포함되었을 것으로 예상되었던 benzo(a)pyrene에 대해서는 억제효과가 낮았다. 순수변이원로서 sodium azide에 대한 마추출물은 산마가 25.4%로, 9.1%인 재배마보다 높았으나 용매에 따른 유의성은 없었다. 2-AF는 마종류에 대한 유의성은 없었으나 Water가 26.2%, MeOH가 41.9%, EtOH가 45.0%, CHCI$_{3}$/MeOH가 84.0%로서 높은 억제효과를 보였다. 특히 산마의 CHCI$_{3}$/MeOH 추출물은 plate당 10 mg 농도에서 가장 높은 91.5%의 억제효과를 보였을뿐 아니라 plate당 1 mg 농도에서도 67%의 높은 억제효과를 나타내었다. 이상과 같이, 본 실험에 사용된 변이원 중 2-AF에 대한 산마 CHCI$_{3}$/MeOH 추출물이 단위 추출물당 억제활성이 가장 높은 것으로 나타났다.

• Journal of Microbiology and Biotechnology
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• 제20권2호
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• pp.346-349
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• 2010

Coenzyme $Q_{10}$ ($CoQ_{10}$) production from Rhizobium radiobacter T6102 was monitored under various oxygen supply conditions by controlling the agitation speeds, aeration rates, and dissolved oxygen levels. As the results, the $CoQ_{10}$ production was enhanced by limited oxygen supply. To investigate whether the $CoQ_{10}$ production is associated with its physiological functions of electron carrier and antioxidant, the effects of sodium azide and hydrogen peroxide on the $CoQ_{10}$ production were studied, showing that the $CoQ_{10}$ contents were slightly enhanced with increasing sodium azide (up to 0.4 mM) and hydrogen peroxide (up to $10\;{\mu}M$) concentrations. These results suggest the plausible mechanism where the limited electron transfer stimulating the environments of limited oxygen supply and oxidative stress could accumulate the $CoQ_{10}$, providing the relationship between the $CoQ_{10}$ physiological functions and its regulation system.

• 한국육종학회지
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• 제41권2호
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• pp.84-91
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• 2009

Rice consumption per capta, in South Korea, has been decreased dramatically, owing to the changes of living patterns. Because of not only the major energy source of Korean people but also major income source of Korean farmers, diversifying end-use-quality of rice has been demanded. To the context, 'Suweon 472', a high yielding and early mature japonica line and released as 'Namilbyeo' to framers in 2002, was treated with a chemical mutagen, Sodium Azide to find endosperm mutant types. A total of nine endosperm mutat lines, including five waxy, one dull, two floury, and one white core type, were identified from the 3,542 mutatagen treated lines. Amylose contents, iodine reaction, disintegration in alkali solution, gelatinization in urea solution and amylogram properties of those nine endosperm mutant lines were evaluated to address the possibility as new genetic materials for diversifying rice quality of Korean japonica cultivars. All embryo mutants were clearly differentiated from their wild type, 'Suweon 472', in terms of physic-chemical properties evaluated. The endosperm mutant lines would be very useful in expanding untiliztation of rice through opening new rice markets of processed foods from Korean japonica rice.

• Environmental Analysis Health and Toxicology
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• 제25권3호
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• pp.223-228
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• 2010

Neocaridina denticulata is a small freshwater shrimp indigenous to Korea. As an indigenous species has long-adapted to particular water environments, the species can be a suitable indicator to assess environmental risks caused by hazard chemicals in the particular site. Thus Neocaridina denticulata, a small freshwater shrimp indigenous to Korea, is worth considering for a test species for such purpose. N. denticulata were exposed to pentachlorophenol sodium salt, sodium azide and potassium dichromate using automatic flow-through system for 96 hours. The 96 hr lethal concentrations ($LC_{50}$) of these chemicals were calculated as $0.53{\pm}0.09\;mg/L$, $2.40{\pm}0.61\;mg/L$ and $1.21{\pm}0.09\;mg/L$ respectively and showed relatively small deviation from repetitive test results. When compared with the toxicity values of other species for each chemical, N. denticulata had moderate or high sensitivity to the toxicity of these chemicals. It can be concluded that N. denticulata is a good test species to evaluate acute toxicity of various hazardous chemicals.