• Applied Microscopy
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• 제23권2호
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• pp.1-10
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• 1993

The effect of electrolyte on the extraction replicas of the precipiates in 3% Si steel was investigated. Three Kinds of electrolyte, 2% Nital solution (2% nitric acid+methanol; acid solution),, Sodium Citrate solution (5% sodiumcitrate+1% KBr+0.5KI+$H_{2}O$; aqueous neutral solution) and 10% AA solution (10% acetylacetone+ 1% tetramethylammoniumchloride+methanol; non-aqueous neutral solution), were compared. The preciptiates in 3% Si steel were dissolved in 2% Nital, but they were not dissolved in the Sodium Citrate and 10% AA solution. In Sodium Citrate solution, however, large second artifacts were introduced during sample preparation. Therefore 10% AA solution was found to be most useful for the preparation of extraction replica. The electrolysis condition of a matrix and precipitates were also checked by the measurement of potential-current curve in 10% AA solution. The matrix was electrolyzed at -400mV with respect to SCE(Saturated Calomel Electrode). In contrats precipitates were electrolyzed above 300mV. Precipitates were respected to be stable in 10% AA solution in the range of $-380mV{\sim}-300mV$ usually used to prepare extraction replicas.

• 한국식품영양학회지
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• 제22권1호
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• pp.20-28
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• 2009

According to traditional oriental medicine, only non-coagulated native deer blood is said to be effective, and coagulated deer blood is ineffective. Thus, a drying and tablet-producing method for deer blood was developed to maintain its physiological and therapeutic activity, and so that after drying, it can be redissolved and protected from coagulation. Proteases such as trypsin, pepsin, chymotrypsin, and aminopeptidase were added to the deer blood indicating that it coagulated in an hour, as shown by the reference. Wax gourd extract, which is high in protease, was added to the blood resulting in anticoagulation for 31 hours. Also, additions of 1% EDTA, 0.38% sodium citrate, 0.16% calcium oxalate, 1.2% ethanol, and 0.006% heparin to the deer blood resulted in anticoagulation for 1 hour, 4 hours, 2 hours, 1 hour, and 31 hours, respectively. In an experiment using 0.19% sodium citrate plus 1% wax gourd extract, and 0.006% heparin plus 1% wax gourd extract, anticoagulation was maintained for up to 72 hours. However, since heparin can not be used in food, the deer blood tablet was made with the addition of 0.19% sodium citrate and 1% wax gourd extract, followed by freeze drying. The dissolution rate for the tablet manufactured in this manner was 96.7%. And the dissolution rates for spray-dried deer blood, vacuum-dried deer blood, and marketed deer blood tablets were 85%, 81%, and 25.5%, respectively. The composition of the tablet produced from the freeze-dried deer blood was 56.4% protein, 18.7% lactose, 1.2% amino acids, 1.0% glucose, 0.7% lipids, 180 mg/100 g of iron, 13 mg/100 g of potassium, 39.1 mg/100 g of calcium, 480 mg/100 g of sodium, 368 mg/100 g of chloride, each.

• 한국식품영양과학회지
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• 제12권2호
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• pp.93-98
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• 1983

사과를 당저림과 넥타 겔로 가공한 후 피막제를 처리하여 저장 조건에 따른 중량 감소율을 측정하고 갈변 현상, 곰팡이의 발생을 실험하여 얻어진 결과는 다음과 같다. 1. 인체에 무해하고 중량 감소, 갈변, 곰팡이 발생을 억제하는 피막제의 구성은 sucrose, D-sorbitol, corn syrup, gelatin, arabia gum, citric acid, sodium citrate, sodium ascorbate가 효과적이었다. 2. 사과 당저림은 피막제 처리한 것을 포장하여 냉장고에서 저장하는 방법이 가장 효과적이었다. 3. 사과 넥타 겔은 피막제 처리한 것을 이중(二重) 포장하여 냉동하는 것이 중량 감소에 의한 수축, 갈변 현상, 곰팡이의 발생을 억제하였다.

• 한국미생물·생명공학회지
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• 제23권5호
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• pp.519-525
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• 1995

This study was carried out to enhance the production of sisomicin by Micromonospora inyoensis ATCC 276000. The effect of various sugars and organic acids as the supplements to a basal mineral medium was tested for the sisomicin production by fully grown mycelium. Among the substances tested, acetate and citrate greatly increased the production of sisomicin at the sixth day of culture. Especially, in the basal mineral medium containing 0.1M sodium acetate, sisomicin production was 6.7 times more than that in the same medium with glucose. When 0.1M sodium acetate was added in the fermentation medium initially, the cell growth was inhibited by sodium acetate, although specific productivity was higher than that in the same medium without sodium acetate. On the contrary, when sodium acetate was added to the culture after three days, the sisomicin production and specific productivity were 1.6 times higher than those in the same medium without sodium acetate. The results suggested that sodium acetate was a stimulating substance of sisomicin production by M. inyoensis.

• 한국양식학회지
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• 제10권4호
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• pp.381-386
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• 1997

A series of experiments were conducted to compare the effects of various diluents in cold storage on the marbled sole, Limanda yokohamae sperm. Various diluents of glucose, L. yokohamae serum, marine fish Ringer's solution, sodium citrate and Ca2+ free artificial seawater (ASM) (tris-HCI, pH 7.4) containing 3 mM ethylene glycol-bis (2-aminoethyl ether) tetraacetic acid (EGTA) were used to store the sperm at 4℃. The storage effect was evaluated using motility index and survival rate of sperm. Glucose and sodium citrate were found to be better diluents which maintained high motility and survival rate of sperm for a storage period of 10 days. Some morphological changes of spermatozoa were observed during the cold storage with diluents. In particular, a detachment of the nuclear enveloped and of the plasma membrane from the nucleus in spermatozoa was observed. Morphological normality of the stored spermatozoa diluted with 0.3 M glucose was better than that of the stored spermatozoa undiluted or diluted with Ca2+ free ASW containing 3 mM EGTA.

• 한국식품영양학회지
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• 제11권4호
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• pp.381-387
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• 1998

The effects of culture conditions on the production of amylase expressed by Bacillus subtilis LKS88 with a cloned gene from Streptomyces albus KSM-35 were investigated. The production of amylase was increased significantly by using sodium citrate and rice hull as a carbon source. In addition, the use of a mixture of sodium citrate and rice hull (1:1) resulted in increase of enzyme production by 20-fold when compared to that of soluble starch. The soybean meal as the nitrogen source could be partially replaced with yeast extract without changing the enzyme production yield. The amylase production was also increased by adjusting initial pH to 6.0 or by adding 0.01% SDS. Maximum amylase production was observed in the medium containing 1.5% sodium cirtate, 1.5% rice hull, 0.7% soybean meal, 0.3% yeast extract, 0.66% K2HPO4, 0.05% MgSO4$.$7H2O, 0.008% CaCl2$.$2H2O, 0.01% SDS with initial pH of 6.0. The maximum yield of amylase reached 56.6 U/ml when B. subtilits LKS88 (pASA 240) was cultured at 37$^{\circ}C$ for 36 hr.

• 한국환경보건학회지
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• 제17권1호
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• pp.129-135
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• 1991

To investigate on the trace element content of twelve edible mushrooms and Aloe arborescens, i. e., Lentinus edodes, Ganoderma lucidum (culturing in wood and soil), Tricholoma matsutake, Agaricus bisporus, Cyrophora esculenta, Auricularia auricula-Jude (produced in Korea and China), Sarcodon asparatus, Pleurotus ostreatus, Coriolus versicolor, Smilax rotundifolia and Aloe arborescerts were analyzed by Atomic absorption spectrometer. The obtained results were summerized as follows: 1. Potassium, sodium, magnesium and iron content for the most part samples were in large quantities, especially phosphorus content of those was highest ammount for the all samples. 2. Sodium content was much ammount in the Lentinus edodes (39mg) and Ganoderma lucidurn (20 mg), Culturing in wood and soil, while potassium was very high ammount in the Aloe arborescens and other samples. Mush ammount of magnesium as compared with others was Lentinus edodes (144mg), Ganoderma lucidurn (128mg), Aloe arborescerts (50mg) and pleurotus ostreatus (60mg). Phosphorus content of Ganoderma lucidurn, Lentinus edodes, Gyrophora esculenta, Auricularia polytricha and Agaricus bisporus was much ammount while iron content of all samples equality higher ammount. Sodium content of Aloe arborescens was not analyzed out for almost all, its potassium (82mg), magnesium (50mg) and iron (18rng) content comparatively higher quentity than others minerals and phosphorus volume (4.9mg) as compared with others, was conspicuously lower detect. 4. Cadimium and lead content of harmful metal element were detected on trace quentity for the most part samples 5. Organic acids of samples i.e., Legtinus edodes, Agaricus bisporus, Pleurotus ostreatus and Ganoderma lucidum were Citrate, Malate, Fumalate, Succinate, Oxalate, Acetate, Lactate, and Tartarate and Citrate, Malate and Fumarate contents were higher amount remarkbly than other organic acids. Tartarate content was trace amount.

• 한국동물학회지
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• 제11권3호
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• pp.75-82
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• 1968

培養 HeLa 細胞의 酸素消費量과 Lysine 吸收에 미치는 X-線 照射의 영향을 측정하였다. 1. 200r의 X-線 照射는 酸素消費量에 아무러한 영향이 없다. 酸素消費量은 succinate, citrate, 및 $\\alpha$-ketoglutarate에 의하여 增大되며 X-線 照射群에서도 이 傾向은 同一하다. 2. 酸素消費量에 미치는 sodium azide 와 2,4-dinitrophenol 의 영향은 X-線 照射에 의하여 상당히 변화된다. 3. Lysine의 初期吸收率은 X-線 照射에 의하여 甚히 低下되며, 또한 飽和吸收量도 減少된다. 4. Glucose는 lysine의 吸收를 促進시키고, succinate는 아무러한 영향이 없으며 citrate와 $\\alpha$-ketoglutarate는 억제한다. X-線 照射는 이러한 傾向에 아무런 변화를 초래하지 않는다. 5. Lysine의 吸收에 미치는 sodium azide와 2,4-dinitrophenol의 영향은 酸素消費量에 미치는 이들의 영향과 判異하다. 이러한 傾向은 X-線 照射群에서도 대체로 동일하다.

• 한국식품과학회지
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• 제54권1호
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• pp.75-79
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• 2022

건강 기능성 소재로 많이 활용되고 있는 수삼은 정제수에서 1시간 세척 후에도 일반세균은 6.5 log CFU/g, 곰팡이는 4.3 log CFU/g 수준으로 높게 나타나 미생물 안전성을 확보하기 위해 상업적 항균제 8종의 적용 실험을 진행하여 다음과 같은 결과를 얻었다. 다양한 박테리아와 곰팡이류에 대한 항균효과가 있는 것으로 알려져 있는 1% (w/w) 구연산나트륨, 이초산나트륨, 초산나트륨, 구연산 및 젖산나트륨 용액에 세척한 수삼을 각각 1시간 동안 침지한 결과 유기산 종류별로 31.0-97.5%의 총세균의 저감화 효과를 보였다. 유기산 계통 항균소재 중 구연산나트륨이 6.5 log CFU/g에서 4.3 log CFU/g으로 2 log CFU/g 내외의 오염 미생물이 저감화 되어 가장 살균력이 좋았다. 수삼에 대한 유기산 항균효과는 물에 해리된 pH 2.4 내외의 산 성분이 미생물의 세포막을 통해 세포질로 확산되어 생육에 필수 인자인 단백질과 핵산의 구조와 기능을 변화시켜 발생하였다. 바실러스 포자에 대해 항균력이 있는 것으로 알려진 계면활성제 계통의 항균제 실험 결과 세척만 적용한 무처리구 6.5 log CFU/g 대비 비타민B₁라우릴 황산염 처리시 3.8 log CFU/g으로 2.7 log CFU/g 감균되어 99.8%의 우수한 살균효과를 나타내었다. 계면활성제의 친수성 및 소수성 부위가 세포막의 유사 부위와 각각 결합하여 구조 변형을 가져오게 되어, 미생물의 세포막이 파괴되면 생육에 관련된 효소, 뉴클레오타이드 및 뉴클레오시드 및 당의 누출을 초래하게 되어 효과적으로 세포 사멸을 유도하게 된다. 통마늘과 통생강과 같은 향신채소의 미생물 제어에 효과적인 1.0% (w/w) 산화칼슘 용액에서는 수삼내 총균이 3.5 log CFU/g으로 무처리구 대비 3 log CFU/g 내외 감균되어 99.9%의 우수한 살균효과를 나타내어 산화칼슘이 수삼의 미생물 감균 소재로 활용도가 높은 것으로 나타났다. 소성 산화칼슘은 pH 12.5의 강한 알칼리성과 활성산소로 미생물의 생리 활성에 영향을 주어 효과적인 살균 효과를 나타내는 것으로 밝혀졌다.

• Weed & Turfgrass Science
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• 제7권1호
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• pp.35-45
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• 2018

갈파래 속(Ulva spp.) 해조류는 연안에서 자주 대발생되어 생태환경과 산업활동에 여러 가지 문제를 일으키기 때문에 이를 해결할 수 있는 방안이 요구된다. 본 연구에서는 화합물과 온도를 이용하여 구멍갈파래(Ulva australis, ULAUS)의 대발생 경감에 보다 효과적으로 활용될 수 있는 기술을 확립하고자 연구를 수행하였다. 그 결과, 화합물간의 혼합처리에 의해 각각의 단독처리보다도 ULAUS 엽상체 고사에 있어서 상승효과를 나타내는 혼합물 조합 3건($H_2O_2$+N-vanillylnonanamide; $H_2O_2$+nonanoic acid; $H_2O_2$+sodium citrate)을 탐색하였다. 아울러, peracetic acid 100 ppm, sodium percarbonate 100 ppm, hydrogen peroxide 30 ppm, sodium chlorite 200 ppm, menadione sodium bisulfite (MSB) 4 ppm 처리 시 $25^{\circ}C$보다는 $40^{\circ}C$의 온수로 처리할 때, ULAUS 사멸을 현저하게 증진시킬 뿐만 아니라 보다 빠른 시간 내에 고사시키는 효과를 나타내었다. 공시된 화합물 중에서 peracetic acid, sodium percarbonate, hydrogen peroxide가 보다 좋은 효과를 보였다. 마찬가지로 $40^{\circ}C$ 온수에 sodium citrate 1,000 ppm (pH 3.0) 또는 acetic acid 200 ppm (pH 3.5)을 처리할 때에도 ULAUS 엽상체 고사에 상승적 작용을 보였는데 이들 화합물 용액 산도(pH)를 8.0으로 하였을 때에는 상가적 작용을 나타냈다. 따라서 이들 결과는 향후 환경 친화적으로 갈파래 대발생을 제어하기 위한 실용화 기술 중의 한 가지로서 발전시킬 수 있을 것으로 사료된다.