• Journal of the Korean Society of Food Science and Nutrition
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• v.12 no.3
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• pp.259-263
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• 1983

This experiment was carried out to investigate the effect of pH at coagulation on fatty acid and sterol composition of green LPC. Green juice of Italian ryegrass, red clover, oats and alfalfa was adjusted at pH 4, 6, 8 and heated at $85^{\circ}C$ for ten minutes. Green LPC was taken from the above green juice. The results obtained were as follows. 1. Green LPC of Italian ryegrass, oats and alfalfa contained much on the order of linoleic acid, palmitic acid and linolenic acid. Methyl ester of these three fatty acid accounted for 70.4% to 86.2% of total fatty acid methyl ester. Green LPC of red clover contained much palmitic acid, linoleic acid, and linolenic acid. These three fatty acid methyl ester accounted for 82.5% to 86.2% of total fatty acid methyl ester. 2. Linolenic acid was highest in the green LPC of red clover, oats and alfalfa which was adjusted at pH 8 and heated and coagulated, and next at pH 6, and pH 4, respectively. Linolenic acid was highest in the green LPC of Italian ryegrass which was adjusted at pH 6, next pH 8, and pH 4. 3. Green LPC of red clover and alfalfa contained cholesterol. The all green LPC contained campesterol, stigmasterol and sitosterol. 4. Sterol was highest in the green LPC of Italian ryegrass, red clover and oats which was adjusted at pH 8 and next at pH 4, and pH 6, respectively. Sterol was highest in the green LPC of alfalfa which was adjusted at pH 8, and next at pH 6, and pH 4, respectively.

• Korean Journal of Environmental Agriculture
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• v.29 no.2
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• pp.184-188
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• 2010

A cyanobacteria species, Anabaena sp. PCC 7120, was tested to assess its biotransformation ability on two widely used insecticides, aldrin and chlorpyrifos-methyl, in the culture medium. The blue-green alga metabolized aldrin mainly to dieldrin by an epoxidation reaction with the participation of cytochrome P450-dependent monooxygenase in the cyanobacteria. The blue-green alga also produced chlorpyrifosmethyl oxon as a primary metabolite from chlorpyrifos-methyl via a desulfuration reaction, presumably conducted by cytochrome P450-dependent monooxygenase. Therefore, two insecticides might be possibly dissipated by cytochrome P450-dependent monooxygenases in the blue-green algae in the contaminated environments.

• Korean journal of applied entomology
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• v.28 no.1
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• pp.32-36
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• 1989

The joint toxic action of mixtures of cypermethrin or pirimicarb with one of other insecticides (acephate, cypermethrin, demeton-S-methyl and pirimicarb) on the cypermethrin or picimicarb-selected green peach aphid (Myzus persicae Sulzer)was investigated. The responses depended on the choice and ratios of insecticide combination. In the cypermethrin-selected strain bioas-say, mixtures of test insecticides showed no synergistic effect. On the other hand, the maxi-mum synergistic effects for the pirimicarb-selected strain were obtained at the 8 : 2 ratio of pirimicarb and demeton-S-methyl exhibited antagonistic effect.

• Bulletin of the Korean Chemical Society
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• v.35 no.10
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• pp.2929-2934
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• 2014

The reaction between $[CdBr_2{\cdot}4H_2O]$ and anhydrous $[ZnCl_2]$ with N,N'-bidentate N-(pyridin-2-ylmethylene)-cyclopentanamine (impy) in ethanol yields dimeric $[(impy)Cd({\mu}-Br)Br]_2$ and monomeric $[(impy)ZnCl_2]$ complexes, respectively. The X-ray crystal structure of Cd(II) and Zn(II) complexes revealed that the cadmium atom in $[(impy)Cd({\mu}-Br)Br]_2$ and zinc in $[(impy)ZnCl_2]$ formed a distorted trigonal-bipyramidal and tetrahedral geometry, respectively. Both complexes showed moderate catalytic activity for the polymerisation of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO), with polymethylmethacrylate (PMMA) syndiotacticity of about 0.70.

• Bulletin of the Korean Chemical Society
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• v.34 no.4
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• pp.1145-1152
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• 2013

The rate constant of alkaline fading of methyl green ($ME^{2+}$) was measured in the presence of non ionic (TX-100), cationic (DTAB) and anionic (SDS) surfactants. $ME^{2+}$ hydrolyses and fades in neutral water and in this work we search the effects of surfactants on its fading rate. The rate of reaction showed remarkable dependence on the electrical charge of the used surfactants. It was observed that the reaction rate constant decreased in the presence of DTAB and SDS and increased in the presence of TX-100. Binding constants of $ME^{2+}$ to TX-100, DTAB and SDS and the related thermodynamic parameters were obtained by classical (or stoichiometric) model. The results show that binding of $ME^{2+}$ to TX-100 and DTAB are two-region and that of SDS is three-region. Also, the binding constants of $ME^{2+}$ to surfactant molecules in DTAB/TX-100 and SDS/TX-100 mixed solutions and their stoichiometric ratios were obtained.

• Journal of Life Science
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• v.5 no.1
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• pp.8-19
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• 1995

The Optimal condition for degradation of crystal violet and other triphenylmethane dyes by Citrobacter sp. SK-3 isolated from the activated sludge of dye manufacturing factory was investigated. The optimal culture medium for the degradation of triphenylmethane dye was composed of minimum inorganic salt medium supplemented with 0.5% galactose, 0.1% beef extract, with the initial pH of 8.0 to 9.0. Under this condition, Citrobacter sp. SK-3 degraded 200 ppm of crystal violet completely within 24 hours. Citrobactre sp. SK-3 also degraded efficiently malachite green, pararosaniline, brilliant green, methyl violet, basic fuchsin and methyl red. Analysis of the degradation products of crystal violet through this layer chromatography and high performance liquid chromatography indicated that the methyl groups bound to crystal violet backborn were gradually demethylated to pentamethyl-, tetramethyl- and trimethylpararosaniline.

• Food Science of Animal Resources
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• v.30 no.1
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• pp.120-123
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• 2010

The standard method for somatic cell counts in goat milk is the direct microscopic method after a pyronin Y-methyl stain. It has been reported, however, that are found to differ by measuring methods, but. A total of forty eight goat milk samples from eight farms were compared by pyronin Y-methyl stain, ADAM-SCC in National Institute of Animal Science, and Somacount 500 in Chungbuk Veterinary Service. The average SCC of the samples was $7.3{\times}10^5$ cells/mL by pyronin Y-methyl stain, $4.9{\times}10^5$ cells/mL by ADAM-SCC, and $11.6{\times}10^5$ cells/mL by Somacount 500. The correlations between the methods were not significant. SCC measuring equipment should be developed for reducing the SCC in goat milk, and pyronin Y-methyl green stain for estimating SCC in goat milk should be included in NVRQS Notice for livestock products processing and composition standards.

• ALGAE
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• v.31 no.1
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• pp.61-72
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• 2016

Arctic microalgae thrive and support primary production in extremely cold environment. Three Arctic green microalgal strains collected from freshwater near Dasan Station in Ny-Alesund, Svalbard, Arctic, were analyzed to evaluate the optimal growth conditions and contents of fatty acids. The optimal growth temperature for KNF0022, KNF0024, and KNF0032 was between 4 and 8℃. Among the three microalgal strains, KNF0032 showed the maximal cell number of 1.6 × 107 cells mL^-1 at 4℃. The contents of fatty acids in microalgae biomass of KNF0022, KNF0024, and KNF0032 cultured for 75 days were 37.34, 73.25, and 144.35 mg g^-1 dry cell weight, respectively. The common fatty acid methyl esters (FAMEs) analyzed from Arctic green microalgae consisted of palmitic acid methyl ester (C16:0), 5,8,11-heptadecatrienoic acid methyl ester (C17:3), oleic acid methyl ester (C18:1), linoleic acid methyl ester (C18:2), and α-linolenic acid methyl ester (C18:3). KNF0022 had high levels of heptadecanoic acid methyl ester (26.58%) and heptadecatrienoic acid methyl ester (22.17% of the total FAMEs). In KNF0024 and KNF0032, more than 72.09% of the total FAMEs consisted of mono- and polyunsaturated fatty acids. Oleic acid methyl ester from KNF0032 was detected at a high level of 20.13% of the FAMEs. Arctic freshwater microalgae are able to increase the levels of polyunsaturated fatty acids under a wide range of growth temperatures and can also be used to produce valuable industrial materials.

• Korean journal of applied entomology
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• v.25 no.3 s.68
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• pp.151-157
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• 1986

Population of the green peach aphid, Myzus persicae(Sulz.), were successively selected(up to 20th generation) in the laboratory by the insecticide oxydemeton-methyl (Metasystox-R 25Ec) and the resistance was linearly increased with the selected generations. The population developed 355.5-to 359.9-fold resistance to oxydemeton-methyl at 20th generation-selection. The population showed cross resistance to the insectides cypermethrin(770.1-to 778.5-fold), acephate(25.6-to 33.2-fold) and pirimicarb(3.4-to 3.6-fold). The different esterase isozymes were detected by the electrophoresis from the selected and non-selected strains and the band of the ${\beta}-2$ from the selected strain showed greater esterase activity than that of the non. selected strain.

• Advances in environmental research
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• v.7 no.2
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• pp.139-159
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• 2018

Green Leaf Volatiles (GLVs) is a class of biogenically emitted oxygenated hydrocarbons that have been identified as a potential source of Secondary Organic Aerosols (SOA) via aqueous oxidation. The physico-chemical properties of GLVs are vital to understanding their fate and transport in the atmosphere via fog processing, but few experimental data are available. We studied the aqueous solubility, 1-octanol/water partition coefficient, and Henry's law constant ($K_H$) of five GLVs at $25^{\circ}C$: methyl jasmonate, methyl salicylate, 2-methyl-3-buten-2-ol, cis-3-hexen-1-ol, and cis-3-hexenyl acetate. Henry's law constant was also measured at temperatures and ionic strengths typical of fog. Experimental values are compared to scarcely-available literature values, as well as estimations using group and bond contribution methods, property-specific correlations and molecular dynamics simulations. From these values, the partition coefficients to the air-water interface were also calculated. The large Henry's law constant of methyl jasmonate ($8091{\pm}1121M{\cdot}atm^{-1}$) made it the most significant GLV for aqueous phase photochemistry. The HENRYWIN program's bond contribution method from the Estimation Programs Interface Suite (EPI Suite) produced the best estimate of the Henry's constant for GLVs. Estimations of 1-octanol/water partition coefficient and solubility are best when correlating an experimental value of one to find the other. Finally, the scavenging efficiency was calculated for each GLV indicating aqueous phase processing will be most important for methyl jasmonate.