• The Korean Journal of Zoology
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• v.9 no.1
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• pp.31-38
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• 1966

굴둑거미속(Cybaeus)은 물거미과(Argyronetidae)에 속하는 거미로서 지금가지 전세계에서 약 62종이 기재되었는데 그 지리적 분포를 보면 신북구에 40종, 구북구에 18종, 신열대구에 3종, 에치초피아구에 1 종의 순으로 되어 신북구가 절대 다수인 67%를 차지하고 있다. 구북구의 16종은 구주산이 5종, 몽고산이 1 종, 중국 본토산이 1 종, 일본산이 11종 기재되어있다. 한국산 굴둑거미속에 대해서는 저자 (1962)가 소백산산의 Cybaeus sp. 1(2 ♀♀)과 Cybaeus sp. 2(2Y♀♀)를 , 남궁씨(1964)가 충주산의Cybaeus sp.를 보고하였을뿐이다. 금반 한국산 굴둑거미속의 거미를 정리한 결과 저자가 보고한 Cybaeus sp.1과 남궁씨가 보고한 Cybaeus sp. 는 동일종으로서 신종에 해당함을 알았으며 이 밖에도 1 신종과 1 미기록종을 얻었기에 이에 기재하였다. 즉 미기록종 : Cybaeus nipponicus (Uyemura, 1938) 신종 : Cybaeus lingus sp. nov. , Cybaeus triangulus sp. nov.

• YAKHAK HOEJI
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• v.5 no.1
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• pp.27-30
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• 1960

단백질의 생물가는 그것을 구성하고 있는 각 아미노산의 양적및 질적조성에 기인하며 그들 아미노산의 양적 대소및 균형이 그 단백질의 영양가를 좌우하고 있다. 또한 인체및 동물에 대한 아미노산의 요구량까지도 보고되어 있다. 이와같이 단백질의 영양학적가치에 대한 개념이 아미노산에 대한 것으로 전환됨에 따라 식품중 아미노산의 함량조사가 여러 나라에서 보고되고 있다. 그러나 우리나라에서는 두류발효제품및 엽채단백질중의 유리 아미노산을 paperchromatography법에 의하여 검출한 것과 비색방법에 의한 양적변화 정도만이 보고되었을 뿐이다. 저자들은 미생물학적방법에 의하여 한국식품중 아미노산의 함량 조사를 착수하여 위선 지금까지 얻은 성적을 보고하고자 한다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.31 no.1
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• pp.17-20
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• 2002

This study was carried out to determine the composition of fatty acids from the samples such as Korean and Chinese sesame oils and adulterated sesame oils with commercial edible oils including soybean and corn oils collected in Gyeongnam area. The fatty acid composition of sesame oils extracted from commercial Korean and Chinese sesame showed similar pattern except the result that Korean sesame oils contained lower levels of palmitic acid, stearic acid and higher level of linolenic acid than Chinese sesame oils. In adulterated sesame oils with commercial soybean oil, the composition of linolenic acid was increased 0.73$\pm$0.05%, 1.25$\pm$0.04% by adding of commercial soybean oil, 3%, 9%, respectively. And that of the linoleic acid was 50.22$\pm$0.06%, 51.14$\pm$0.05% by 5%, 9% addition of commercial corn oil, respectively. From these results, sesame oils and adulterated sesame oils with commercial edible oils will be verified by the composition analysis of fatty acids.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.7 no.4
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• pp.219-227
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• 2009

The effect of organic acids on the adsorption of U(VI) onto oxide surfaces ($TiO_2)$(anatase), $SiO_2$(amorphous) and $Al_2O_3$(amorphous)) has been investigated. Two different organic acids, salicylic and picolinic acids, were used. Changes of adsorption ratio of U(VI), which depend on the existence of organic acids in a sample, were measured as a function of pH. Quantities of adsorbed organic acids, which depend on the existence of U(VI) in a sample, were also measured as a function of pH. It is confirmed that the soluble complex formation of U(VI) with organic acids can deteriorate the adsorption of U(VI) onto $TiO_2$ surface. It is noteworthy that salicylic acid does not affect the adsorption of U(VI) onto $SiO_2$ surface, however, picolinic acid enhances the adsorption of U(VI) onto $SiO_2$ surface. The latter effect can be understood by considering the formation of a ternary surface complex on $SiO_2$ surface, which was confirmed by the co-adsorption of picolinic acid with U(VI) and the change in a fluorescence spectra of U(VI) on surface, In the case of $Al_2O_3$, organic acids themselves were largely adsorbed onto a surface without deteriorating the adsorption of U(VI). This would support the possibility of a ternary surface complex formation on the $Al_2O_3$ surface, and an additional spectroscopic study is required.

• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.9
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• pp.1101-1108
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• 2008

This study was carried out to compare the physiological activities of the extracts from Korean and Chinese Viola mandshurica W. Baker. The water extract from leaves of Chinese V. mandshurica exhibited the highest extraction yields of 30.45 g/100 g and the highest content of total flavonoids as 102.30 mg/g. Also, its ethanol extract showed the best content of polyphenol compounds as 136.16 mg/g. The leaf extract of Korean V. mandshurica produced higher electron donating abilities (EDA) of 92.69% (KLW) and 93.61% (KLE) than the other fractions. The strongest SOD-like activity was shown in the ethanol extract from Korean leaves of 17.28% at the concentration of 1.0 mg/mL. The nitrite scavenging abilities (NSA) of the leaf extracts of V. mandshurica from China were intense over 50% at pH 1.2 and 3.0. In the results of inhibitory rates of xanthine oxidase (XO), both ethanol extracts from Korean and Chinese leaves were higher than the other fractions as 98.67% and 93.80% respectively. Effect of tyrosinase inhibition was the highest in the water extract (45.04%) of Chinese leaves, followed by its ethanol extract (31.36%). The results of EDA, SOD-like activity and XO inhibition of the leaf extracts from Korean V. mandshurica were higher than those of Chinese, on the other hand, determinations on total polyphenol contents, NSA and tyrosinase inhibition were higher in those of Chinese.

• Food Science and Preservation
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• v.20 no.3
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• pp.342-347
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• 2013

In recent years, polyphenol-rich herbs, fruits and processed foods, which are made of plant origin, have attracted much attention due to their potential health benefits. Pomegranate (Punica granatum L.) is an important source of bioactive compounds and has been used to treat diseases because of its medicinal properties. This research was focused on characterizing Korea's national cultivar and a similar product from California, USA. To evaluate their bioactive compounds and pharmacological activities, their anti-oxidation and cancer inhibition properties, as well as their organic acid and free sugar contents, were investigated. The national cultivar had low total sugar and high organic acid contents, contrary to the imported product. The results showed that the peel of national cultivar had high polyphenol and ellagic acid contents compared to imported product. The free radical scavenging capacity was evaluated via 2,2-diphenyl-1-picrylhydrazyl (DPPH) and its positive correlation with the total polyphenol contents was found. The anti-cancer activity of methanol extracts revealed growth inhibition against the prostate cancer cell. These results signify that while pomegranate, national cultivar, is more sour than the imported product, its health benefits could be excellent. Also, the polyphenol compound content of the non-edible part (such as the peel and the seed) was higher than that of the juice. Thus, it is suggested that the byproduct of the juice extraction could be potentially used in other fields such as medicine or dietary agents.

• Food Science and Industry
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• v.53 no.1
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• pp.33-42
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• 2020

In accordance with the recent trend of environmentally friendly agricultural policy, product registration of agricultural chitosan among the organic materials has been displayed in various forms such as soil improving agent, crop growth, and pest control. Chitin production industry is expected to bring competitiveness by producing low-quality and low-cost chitin for agriculture, rather than high-quality and high-cost for food, medical products. Since there are various soil microorganisms that can decompose chitin and chitosan in farm soil where crops are produced, it can be applied usefully to agricultural sites suitably for crop growth and pest control using chitin and chitosan as substrates. The purpose of this study is to compare and analyze the registration status of organic materials companies using chitin and chitosan raw materials in the organic materials information system of the NAQS, and to provide an opportunity to further expand the agricultural use of domestic chitin and chitosan.

• Journal of Life Science
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• v.18 no.3
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• pp.387-394
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• 2008

This research was performed to determine the proximate compositions, mineral contents, alginic acid, antioxidative activities and amino acids of sea mustards (Miyeok: Undaria pinnatifida) collected from Gijang and Wando area. Ash content was higher in Gijang samples, whereas carbohydrate and moisture were higher in Wando Sil Miyeok. General compositions of dried sea mustard showed different contents as manufacture's company and places. The major free amino acids were hydroxyproline, alanine, glutamic acid and asparagine in Gijang samples. Both Gijang and Wando Sil Miyeok showed lower contents comparing with Gijang Gadak Miyeok. Major mineral content was Na, K, Ca, Mg and P, and especially, Na and K were the most abundant in both Gijang and Wando sea mustards. Alginic acid content was almost similar in both sea mustards. Antioxidative activity of methanol extract of sea mustards was measured by using DPPH radical scavenging and SOD-like activity. DPPH radical scavenging activity was 45.5% $(40\;{\mu}g/ml)$ in Gijang Gadak Miyeok and 37.0% and 26.0% $(40\;{\mu}g/ml)$ in Gijang and Wando Sil Miyok, respectively. SOD-like activity of Gijang and Wando Sil Miyok was 63% and 71% $(10\;{\mu}g/ml)$, respectively. These results show that biological activities depend on Miyeok manufacture's process. When stimulated macrophages RAW264.7 cells with lipopolysaccharide (LPS), inhibition of NO production in Gijang Sil Miyeok (44.2%) was 9% high comparing with that of Wando Sil Miyeok (35.7%).

• Journal of Life Science
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• v.17 no.5 s.85
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• pp.634-640
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• 2007

Our previous study suggested that n-3 fatty acid deficiency was associated with significantly reduced spatial learning as assessed by Morris water maze test. Here we investigated an effect of n-3 fatty acid deficiency on rat brain, retina and serum fatty acyl compositions at 15 wks age using a first generational artificial rearing technique. Newborn Rat pups were separated on day 2 and assigned to two artificial rearing groups or a dam-reared control group. Pups were hand fed artificial milk via custom-designed nursing bottles containing either 0.02%(n-3 Deficient) or 3.1% (n-3 Adequate) of total fatty acids as a-linolenic acid(LNA). At day 21, rats were weaned to either n-3 deficient or n-3 adequate pelleted diets and fatty acid compositions of brain, retina and liver were analyzed at 15 wks age. Brain docosahexaenoic acid(DHA) was lower(58% and 61%, P<0.05) in n-3 deficient in comparison to n-3 adequate and dam-reared groups, receptively, while brain docosapentaenoic acid(DPAn-6) was increased in the n-3 deficient group. In retina and serum fatty acid compositions, the decreased precentage of DHA and increased precentage of DPAn-6 were observed. These results suggested that artificial rearing method can be used to produce n-3 fatty acid deficiency in the first generation and that adequate brain DHA levels are required for optimal brain function.

• Journal of Life Science
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• v.14 no.3
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• pp.490-495
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• 2004

Phosphate-solubilizing activities of the two strains (Burkholderia sp. DA23 and Klebsiella sp. DA7l-1) against tri-calcium phosphate and hydroxyapatite were quantitatively determined. Two strains were found to solubilize two types of insoluble phosphate different amounts of amino acid solutions in liquid culture. MPS ability of the strains was increased with concentration of amino acid addition. The optimal solubilization condition of insoluble phosphate in sucrose minimal medium were 0.1% amino acid solution, respectively. The efficiency of amino acid addition was no difference between the two types of insoluble phosphate, tri-calcium phosphate and hydroxyapatite.