• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.7 no.1
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• pp.49-59
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• 1997

This study was performed to analyze the purity of technical grade ${\alpha}$-naphthylamine, to establish optimal analytical condition of ${\alpha}$-naphthylamine in urine and to determine the urine sample of workers exposed to ${\alpha}$-naphthylamine. The purity of technical grade ${\alpha}$-naphthylamine were $96.5{\pm}2.38%$, $94.1{\pm}0.97%$, $97.0{\pm}0.02%$ by gas chromatography-mass selective detector. To analyze ${\alpha}$-naphthylamine in urine, high performance liquid chromatography-electrochemical detector and gas chromatography-electron capture detector operating conditions have been optimized by preliminary expriment. In high performance liquid chromatography-electrochemical detector, the mobile phase was consisted of acetonitrile(35%) and water(65%), and the flow rate was maintained at 1.0ml per minute. Optimal detective condition was 9.0V(10nA/V) of electrochemical detector. The recovery of sep-pak treatment method was highly estimated as pretreatment of ${\alpha}$-naphthylamine in urine. The free amine was isolated by gas chromatography-electron capture detector after basic hydrosis, sep-pak treatment, toluene elution and HFBA(heptafluoro-butyric anhydride) derivatization of urine. The recovery of ${\alpha}$-naphthylamine in urine was $98.73{\pm}3.29%$ by gas chromatography-electron capture detector. The sensitivity was more higher than that of high performance liquid chromatography-electrochemical detector. Urinary ${\alpha}$-naphthylamine was detected in only one worker among nine workers. The level of ${\alpha}$-naphthylamine in urine was 6.42 ng/ml.

• Toxicological Research
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• v.3 no.1
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• pp.27-32
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• 1987

Ethyl acetate extracts of 6 commercial amaranths produced in 1985 and 1986 were analyzed with a gas chromatograph. The ${\alpha}$-naphthylamine ranging from 142 ppb to 4216 ppb was detected, but the ${\beta}$ naphthylamine was not detected. The mutagenicity of the ethyl acetate extract was tested using Salmonella typhimurium TA100 in the presence of the S-9 fraction. Significant mutagenic activity was seen in samples containing high levels of ${\alpha}$-naphthylamine. It is suggested that the potential hazard of amaranth to the general public should be reconsidered from the point that the impurities contained in amaranth preparations are the main sources of mutagenicity or carcinogenicity.

• Journal of the Korean Chemical Society
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• v.5 no.1
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• pp.60-65
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• 1961

Nowadays, it is a well-known fact that the epoxy resins play an important role in the industrial field of plastics because of their excellent properties. Although studies on the polymers of epichlorohydrin with phenols, up-to-date, were various, there were only a few wokrs on the polymers of epichlorohydrin with amines. Therefore the experiments are carried out about the polymerization of epichlorohydrin with ${\alpha}-, {\beta}$-naphtylamine, o-, m-, p-toluidine, and o-, m-, p-nitroaniline. Examining the polymerization processes and the differences in the properties of the polymers, we obtained the following conclusions. 1) ${\alpha}$-naphthylamine, ${\beta}$-naphthylamine, o-toluidine, m-toluidine and p-toluidine react with epichlorohydrin to form polymers but o-, m-, and p-nitroaniline do not make polymers with epichlorohydrin. 2) As polymerization times after adding sodium hydroxide and refluxing again 3hrs. are suitable for ${\alpha}$-naphthylamine-epichlorohydrin, 3.5hrs. for${\beta}$-naphthylamine-epichlorohydrin, and 4hrs, for m-toluidine-epichlorohydrin. 3) Method for determining molecular weight of these polymers by the titration of end group is applicable to the polymers having D.P. less than about 200 for ${\alpha}$-, ${\beta}$-naphthylamine-epichlorohydrin and those having D.P. less than 18 for m-toluidine-epichlorohydrin. 4) Gererally, these polymers get special colors so that these need proper pigmentation to use as molding compounds.

• Proceedings of the Korean Society of Crop Science Conference
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• 1988.07a
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• pp.14-15
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• 1988

• Proceedings of the Korean Society of Crop Science Conference
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• 1988.07a
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• pp.16-17
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• 1988

• Membrane Journal
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• v.7 no.3
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• pp.131-135
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• 1997

Polymeric micellar enhanced ultrafiltration method using a new type of polyrmer, $\alpha$-allyl-$\omega$-methoxy polyoxyethlene and maleic anhydride copolymer (AKM-0531, Mw 15, 000), has been proposed to separate 1-naphthylamine as a weak cationic toxic organic solubilizate. Enhancement effect of polymeric micelle was identified by the ultrafiltration runs using polyacryronitrile(PAN) holow fiber membrane with molecular weight cut off 6, 000. The linear dependance of flux on the pressure difference is shown to be valid up to 0.6kg/${cm}^2$ and the rate of flux increase in response to change in the pressure is gradually reduced under the pressure difference. Rejection of 0.96 was observed for f mM of 1-naphthylamine with 2 wt.% polymer solution at the conditions of 0.4kg/${cm}^2$, natural pH. and $25^{\circ}C$ Solubilization of 1-naphthylamine into the polymeric micelle enhanced the separation efficiency.

• Journal of Korean Society of Forest Science
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• v.84 no.3
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• pp.361-368
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• 1995

This study was aimed to reduce the period of bed log through the protection of harmful fungi and to investigate the effects of physiologically activating substance on the yield increase of Lentinus edodes. Extracts of Allium fistulosm, Hordeum vulagare var. hexastichon, Lentinus edodes. Daucus carota var. sativa, and Citrus junos were used as a physiologically activating substances. The degree of mycelial growth tested by color change after Benzene - azo - ${\alpha}$ - naphthylamine. One percent extract of Album fistulosm was most highly effective as a physiologically activating substance on mycelial biomass growth of Lentinus edodes. Best effects of application of physiologically activating substance was observed in Quercus variabilis bed logs. These results suggested that supplement with physiologically activating substance to the bed log would be beneficial for the production of Lentinus edodes.

• Korean Journal of Materials Research
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• v.15 no.7
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• pp.448-452
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• 2005

This study was based on organic electroluminescence display. Especially, TPD and $\alpha-NPD$ for the hole transport materials were synthesized by Ullmann reaction. This reaction was conducted between 3­methylphenylamine, 1-naphthylamine and 4,4'-diiodobiphenyl in toluene containing CuCl catalyst and KOH base. The structural property of reaction products were analyzed by FT-IR, $^1H-NMR$ spectroscopy, and thermal stability, reactivity and PL property were analyzed by melting point, yield and emission spectrum, respectively. The photoluminescence spectra of a pure TPD and $\alpha-NPD$ were observed at approximately 416nm and 438nm respectively. In this study, it was known that the melting point, yield, PL properties of TPD and $\alpha-NPD$ were changed by substituent group of amines.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.8 no.4
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• pp.213-216
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• 1975

Yellow sea bream contains comparatively larger amount of fat among white muscle fishes, so that rancidity might easily occur during drying and storage. For the purpose of the protection of rancidity, the effect of some antioxidants was studied when yellow sea bream was sun-dried after dipping in the solutions and packed in PVC film$0.3mm\times12cm\times30cm $ for storage at room temperature. The inhibitory effect of additives was in order of Tenox-II, BHA, Sustane and NDGA, while EDTA, potassium sorbate, CTC and $\alpha-naphthylamine$ were ineffective. The results suggest that the treatment of $0.1\%$ Tenox-II solution and packing in PVC film is better condition to improve the quality of product and during drying and storage.

• YAKHAK HOEJI
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• v.18 no.1
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• pp.59-73
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• 1974

Fifteen derivatives of phthalide were synthesized from m-hemipinic, hydrastic and 4,5-benzophthalic anhydride with acetic, phenylacetic, p-methoxyphenylacetic, p-nitrophenylacetic, ${\alpha}$-nephthylacetic and succinic acid by the Gabriel condensation. In the same way, 13 derivatives of phthalimidine and 4 derivatives of ${\alpha,\beta}$ -benzisothiazoline-1, 1-dioxide were synthesized from diphenylmaleimide, phthalimide, saccharine and 4,5-benzo-phthalimide with previous 6 acids. 3-Substituted derivatives of m-hemipinic anhydride, hydrastic anhydride and 4,5-benzophthalic anhydride were treated with formamide and seven 3-substituted imidines could be synthesized. In case of 4,5-benzophtha lide, two isomers,4,5-benzophthalidene-3-acetic acid and 4,5-benzophthalidene-1-acetic acid, can be obtained theoretically, but only one product we got, and the chemical structure of it was identified by the following way. It was hydrolyzed and then decarboxylated, and this decomposed product was identical with 1-acetyl-2-naphthoic acid which was synthesized from .betha.-naphthylamine. This indicates that by the Gabriel condensatioin 4,5-benzophthalide only produces 4,5-benzophthlidene-3-acetic acid, that is ${\alpha}$-carbonyl substitute.