• Journal of information and communication convergence engineering
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• 제15권4호
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• pp.227-231
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• 2017

Recently, as the number of safety accidents caused by reagents increases, researches on a system that can reduce safety accidents are underway. Existing systems managed reagent cabinet through various sensors. On the other hand, there are disadvantages in that countermeasures against simultaneous danger situations are insufficient at multi-reagents cabinet. In order to solve this problem, this paper proposes a system to manage the reagents cabinet through danger priority. Danger priorities are selected through domestic chemical accident cases and the Chemical Safety Management Act. If a danger situation occurs in the reagent cabinet, make sure it is from a single or multiple reagent cabinets. For multiple reagent cabinets, compare the reagent cabinet priorities and run the device sequentially from the reagent cabinet with the highest priority. Thus, by operating the device according to the danger priority, the chain reaction can be prevented in advance and the reagent cabinet can be safely managed.

• BMB Reports
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• 제37권5호
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• pp.515-521
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• 2004

The tricarboxylate (or citrate) carrier was purified from eel liver mitochondria and functionally reconstituted into liposomes. Incubation of the proteoliposomes with various sulfhydryl reagents led to inhibition of the reconstituted citrate transport activity. Preincubation of the proteoliposomes with reversible SH reagents, such as mercurials and methanethiosulfonates, protected the eel liver tricarboxylate carrier against inactivation by the irreversible reagent N-(1-pyrenyl)maleimide (PM). Citrate and L-malate, two substrates of the tricarboxylate carrier, protected the protein against inactivation by sulfhydryl reagents and decreased the fluorescent PM bound to the purified protein. These results suggest that the eel liver tricarboxylate carrier requires a single population of free cysteine(s) in order to manifest catalytic activity. The reactive cysteine(s) is most probably located at or near the substrate binding site of the carrier protein.

• Bulletin of the Korean Chemical Society
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• 제16권1호
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• pp.12-16
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• 1995

The diastereoselectivity of addition reaction of crotylmetal reagents to cobalt-complexed acetylenic aldehydes and metal-free aldehydes was examined. The anti-diastereomer was the predominant product when the crotyl metallics were Cr, Sn, and Zr. In THF, the uncomplexed aldehydes normally gave higher anti-diastereoselectivity. However, the cobalt-complex of silicon-substituted propynals with three bulky substituents produced increased proportions of syn-diastereomer. In DMF, the selectivity shifted towards syn-isomer except in the case of dimethylphenylsilyl substituent. When tributylstannane was used in the presence of BF3 etherate, moderate syn- selectivity was observed with uncomplexed aldehydes, but only decomposed products from complexed aldehydes.

• Bulletin of the Korean Chemical Society
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• 제7권1호
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• pp.70-73
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• 1986

New amino protective reagents, t-butyl benzotriazol-1-yl carbonate and benzyl benzotriazol-1-yl carbonate, for t-butoxycarbonylation and benzyloxycarbonylation of amines and amino acids have been developed. t-Butyl benzotriazol-1-yl carbonate reacts rapidly and cleanly with various amines and amino acids to afford N-Boc amines and N-Boc amino acids in high yields and benzyl benzotriazol-1-yl carbonate is also found to be very effective in the benzyloxycarbonylation of amino acids.

• Bulletin of the Korean Chemical Society
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• 제19권4호
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• pp.475-481
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• 1998

Details of various equilibria involved in the reactions of oxaza- and thiazazincolidine catalysts, generated from either β-amino alcohol or β-amino thiol, with aldehyde were studied by colligative measurements. The results indicated that the coordination of diethylzinc prior to the coordination of aldehyde is essential for high enantioselectivity of the thiol catalyzed reaction. The probable origin of asymmetric nonlinearity is also presented.

• Bulletin of the Korean Chemical Society
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• 제26권1호
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• pp.157-160
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• 2005

Allylindium and propargylindium reagents in situ generated from the reactions of indium with allyl halides and propargyl halides could participate as nucleophiles in Pd-catalyzed substitution reactions of allyl carbonates to produce 1,5-dienes and 1,5-enynes in good yields. $\beta$-Hydride elimination products were produced in case of carbonates having $\beta$-hydrogens. Because organoindium reagents obtained from allyl or propargyl halides and indium have previously not been used to Pd-catalyzed allylic and propargylic substitution reactions, these results should provide more opportunities for the development of new C-C bond forming reactions.

• Bulletin of the Korean Chemical Society
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• 제16권2호
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• pp.86-88
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• 1995

• Bulletin of the Korean Chemical Society
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• 제16권5호
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• pp.464-466
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• 1995

• Bulletin of the Korean Chemical Society
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• 제16권6호
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• pp.561-565
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• 1995

• 대한화학회지
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• 제26권1호
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• pp.24-30
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• 1982

란탄족 화합물인 Ln$(fod)_3$ (Ln = Pr, Nd, Eu 및 Yb)를 사용하여 contact-only (COM) 및 dipolar-only (DOM) 2성분계 혼합물을 만든 후 기질인 4-picoline의 $F_i$ 및 $G_i$값을 핵자기공명 이동으로 부터 측정하였다. 그 결과 Pr$(fod)_3$ 및 Eu$(fod)_3$의 혼합물인 COM 1 및 DOM 1으로 얻은 값들을 단일 Ln$(fod)_3$로 얻은 값들과 잘 일치하였다. 그러나 $(fod)_3$ 및 Yb$(fod)_3$의 혼합물인 COM 2 및 DOM 2로 얻을 값들을 단일 Ln$(fod)_3$로 얻은 값들과 상당한 오차를 나타내었다. 그 오차는 이테르븀(Yb) 착물에 기인하는 것으로 추정되었다.