• The Korean Journal of Food And Nutrition
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• v.14 no.2
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• pp.132-137
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• 2001

To know a degree of pollution in agricultural products cultivated around 4 unworked mines located in Chollanam-Do, we investigated a concentration of trace metal to provide the basic data for its residual limits. 28 samples of seven kinds of agricultural products (lettuce, onion. potato, radish, pepper. pumpkin, bean) collected from 4 unworked mines located in Chollanam-Do in 1999 were analyzed by Mercury Analyzer for mercury and Atomic Absorption spectrophotometer for Pb, As, Cd. Cu, Mn, and Zn. Hg contents were detected N.D. ∼trace level (0.01 ppm and less) and As contents were detected N.D. ∼ 0.038 ppm but most of samples were not detected. Cd contents were detected N.D∼0.101 ppm. The results of Hg, As, Pb and Cd content showed that for all the 7 species of agricultural products studied, none have accumulated levels dangerous enough to pose health problems. The average contents of Cu were 4.356∼10.624 rpm in bean. the Mn were 4.332∼24.385 ppm in lettuce and the Zn were 4.072 ∼ 20.715 ppm in bean, respectively.

• Journal of Biosystems Engineering
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• v.4 no.1
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• pp.58-66
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• 1979

동력경운기용 두류의 무경운 파종기에 부착하여 사용하는 구절기중에서 소요견인력이 작고 구절작업정도가 양호한 구절기의 개발을 위한 기초자료를 얻기 위하여 구동식 토조에 인공강토를 채우고 원판형 및 호우형 구절기의 소요견인력과 이에 영향을 미치는 인자들의 관계를 구명코자 실내모형 확험을 실시하여 다음과 같은 결과를 얻었다. 원판형 구절기에 대하여 직경별로 조립각을 $8^{\circ}$ 와 $16^{\circ}$, 경심을 3 cm 와 6cm로 변화시키면서 2.75cm/sec의 속도로 견인력을 측정한 결과 원판의 직경이 약 28cm인 경우에 견인력이 최소로 나타났고, 직경이 이보다 크거나 작은 때는 견인력이 증가하는 경향을 나타냈으며 비저항도 대체로 비슷한 경향이었으나 원판의 직경이 약 30cm 일 때 최소로 나타났다. 종자파종의 심도조절을 목적으로 작구심(3cm 및 6 cm)과 견인력과의 관계를 조사하였던바, 경심과 견인력과의 관계는 거의 직선적인 변화를 나타냈으며 견인력에 영향을 미치는 인자중에서 경심의 영향이 가장 컸음을 알 수 있었다. 일반적으로 조립각 미 주행속도에 별 영향없이 경심 3cm 및 6 cm 공히 견인력은 직경 약 28 cm에서 , 비저항은 약 30cm에서 최소의 값을 나타내었다. 파종기의 작업성능과 관계가 깊은 주행속도 및 파시의 조절을 목적으로 원판의 조립각과 주행속도가 견인력에 미치는 영향을 조사했던 바, 조립각과 주행속도가 증가함에 따라 모두 견인력이 증가하는 경향을 나타내었으나 견인력에 미치는 영향은 주행속도가 더욱 크게 나타났다. 원판형 구절기와 호우형 구절기를 비교하기 위하여 쐐기각이$16^{\circ}$ 이고 리프트 각이 $20^{\circ}$ 인 호우형 구절기와 조건이 비슷한 조립각$16^{\circ}$ 의 원판형 구절기의 견인특성을 비교한 결과 직경 30cm 인 원판형의 경우는 비저항이 0.35-0.5kg/$cm^2$인데 비해 호우형의 경우는 0.71-1.02kg/$cm^2$로 나타나 호우형의 견인저항력이 평균 2 배정도 크게 나타났고 작구상태고 원판형의 경우보다 불량하였다.

• Journal of Food Hygiene and Safety
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• v.6 no.3
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• pp.139-145
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• 1991

In order to observe the Na contents, Korean common foods, especially processed foods were analyzed by Atomic Absorption Spectrophotometer. 1. The Na contents of instant noodle (ramen) was 400-900 mg/100 g and Na contents of their soup powder was 10000-16000 mg/100 g. 2. The Na contents of corns and beans was very low but their processed foods, com Dake and soybean milk, had relatively high Na contents. 3. The Na contents of meats was 40-60 mg/100 g but the Na contents of meats products was 700-900 mg/100 g. 4. The Na contents of Davoring salt was 12000-38000 mg/100 g, those of soybean products was 3000-6OOO mg/100 g, and that of seasoning MSG was 8000-17000 mg/100 g. 5. There was no statistical difference between the results of wet ash method and dry ash method in the Na contents of all food groups.

• The Korean Journal of Food And Nutrition
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• v.23 no.2
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• pp.226-232
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• 2010

새로운 항치매성 건강식품을 개발하기 위해 아세틸콜린에스터레이즈(AChE)를 강력하게 저해하는 추출물을 곡류와 두류의 다양한 추출물로부터 선발한 후 최적 추출 조건을 조사하였다. 추출물 중 수수 메탄올 추출물이 63.4%의 가장 높은 AChE 저해 활성을 보였다. 수수를 80% 메탄올로 $40^{\circ}C$에서 12시간 추출했을 때 최대의 AChE 저해 활성을 나타내었다. AChE를 저해하는 수수 메탄올 추출물의 영양성과 생리 기능성을 조사하였다. 메탄올 추출물은 유리당으로 고형물 100 g당 4.78 g의 포도당과 4.13 g의 자당 및 0.97 g의 과당을 함유하였다. 또한, 수수 메탄올 추출물의 고형물 100 g에 linoleic acid 273.82 mg, oleic acid 215.65 mg, palmitic acid 122.03 mg, stearic acid 4.96 mg을 함유하고 있었고, 주요 유기산으로 주석산 27.45 mg, 말론산 15.43 mg, 사과산 9.94 mg이 메탄올 추출물 1 g에 함유되어 있었다. 수수 메탄올 추출물은 항치매 활성 외에도 콜레스테롤 합성을 저해하는 HMG-CoA reductase 저해 활성이 50.2%이었고, 항산화 활성은 56.1%를 보였다.

• Korean Journal of Food Science and Technology
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• v.30 no.1
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• pp.224-229
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• 1998

A study was conducted to screen the inhibitory activity of 3-hydroxy-3-methylglutaryl coenzyme A(HMG-CoA) reductase, which is known to be rate-limiting enzyme in cholesterol bosynthesis, from the extracts of 80% methanol and 70% ethanol of cereals and regumes. The strongest inhibitory activity was shown in the ethanol extract of sorghum among the ethanol extracts. The inhibitory activity of HMG-CoA reductase of prosomillilet methanol extract was 73%, and highest among the methanol extracts. The inhibitory activity of 44.7% was observed in sorghum methanol extract. The methanol extracts of prosomillet and sorghum were further fractionated with hexane, chloroform, ethylacetate, butanol and water. HMG-CoA reductase inhibitory activity was shown in all fractions of prosomillet and sorghum methanol extracts. Hexan fraction of both prosomillet and sorghum had the strongest inhibitory activity among five fractions, and the inhibitory activity was increased compared to each crude extracts.

• Korean Journal of Food Science and Technology
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• v.27 no.5
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• pp.762-767
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• 1995

The ${\alpha}-Amylase$ inhibitor from black bean(Phaseolus vulgaris) was purified to homogeneity using 70% saturated ammonium sulfate, DEAF-cellulose, Concanavalin-A sepharose chromatography and gel filtration with Superose 6. The purified α-amylase inhibitor showed a single band of 25 KD in molecular weight on the SDS-PAGE. The specific activity of the inhibitor was 544.0 units/mg and the purity was enhanced about 18-fold. The amino acids of ${\alpha}-Amylase$ inhibitor from black bean was mainly glutamic acid, aspartic acid and lysine. The inhibitor was glycoproteins and its carbohydrate contents was 3.2%.

• The Journal of Natural Sciences
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• v.19 no.1
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• pp.45-55
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• 2008

Alzheimer's disease is charaterized by the acetylcholine depletion, amyloid b-protein aggregation and neurofibrillary tangles. The prevention of the breakdown of acetylcholine by acetylcholinesterase (AChE) inhibitor has the best clinically therapeutic efficacy for Alzheimer's disease patients. To develop new antidementia alternative drugs or nutraceuticals, methanol extracts of Sorghum bicolor was screened from various extracts of cereals and legumes as a potent AChE inhibitor-containing extract in previous paper. In this paper, physicochemical properties of the methanol extracts was investigated. The methanol extracts was soluble by water, methanol and DMSO and had 215 nm and 282nm of maximum absorption spectra. It was also stable at 20-$100^{\circ}C$ and pH 2.0-10.0 for 1 hr. Test product was prepared by using methanol extracts from Sorghum bicolor and changes of its quality during storge at $20^{\circ}C$ and $40^{\circ}C$ were investigated. It was very stable for 8 weeks at $40^{\circ}C$.

• Applied Biological Chemistry
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• v.35 no.2
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• pp.92-98
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• 1992

Some physicochemical properties and molecular structure of cow pea, mung bean and acorn starches(mook-forming starches) and red bean, wheat and sweat potato starches(mook-unforming starches) were investigated. Amylose contents of cow pea, mung bean and acorn starch were higher than the others. Cow pea starch was similiar to mung bean starch in gelatinization characteristics by Brabender amylogram but cold viscosity of red bean starch and peak viscosity of sweet potato starch were especially high. Whereas viscosity of wheat starch was low in whole temperature range. Amylose molecules of larger molecular size$(above\;5{\times}10^5\;molecular\;weight)$ of three mook-forming starches were more than shoes of red bean and wheat starch. Chain distribution ratios$(DP\;35{\sim}55\;to\;DP\;10{\sim}20)$ of cow pea, mung bean and acorn amylopectin were higher than thoes of red bean, sweet potato and wheat amylopectin.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.7
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• pp.1064-1070
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• 2005

Tocopherol and tocotrienol contents of commonly consumed foods in Korea were determined by saponification or direct solvent extraction followed by normal phase liquid chromatography. All samples were locally obtained in the year of 2002 and 2003. The study included 13 meats, 15 fishes and shellfishes, 4 seaweeds, 7 mushrooms, 19 milk and milk products, 6 legumes, 12 nuts, 17 processed foods and 17 Korean traditional foods. All of the vitamin E isomers were quantitated and the results were expressed as $\alpha-tocopherol$ equivalent $(\alpha-TE)$. The relatively higher amount of vitamin E was found in beef boiled in soy, dried squid, toasted seaweed, milk powder, soritae, sunflower seeds, ramyon (instant noodle), and kochujang from meats, fishes, seaweeds, milk products, legumes, processed foods, and traditional foods, respectively. This study provided reliable vitamin E data in commonly consumed foods in Korea for the nutritional information and food composition database.

• Korean journal of applied entomology
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• v.15 no.2 s.27
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• pp.61-68
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• 1976

Leading soybean cultivars such as Kwanggyo, Yugu No.3, Dongbugtae, Gangrim, and Eundaedu were heavily diseased by a virus in Korea. The disease was most severe in the northern provinces where soybean mosaic virus also occurrs, but the disease has also been observed in other provinces where soybean diseases are less prevalent. The disease symptoms were similar to bud blight caused by tobacco ringspot virus; but this was not confirmed in inoculation tests on indicator plants and serological experiments. There were some differences in varietal susceptibility to the disease, with symptom variation depending on the soybean cultivar and source of inoculm. Disease symptoms on infected soybean plants were mottling and necrosis. The present results, therefore, indicate some strains of SMV or a mixture of legume viruses may or may not be responsible for the disease.