• Title/Summary/Keyword: 과학흡수

Search Result 1,466, Processing Time 0.023 seconds

Binding of Iron by Vegetable Fiber (식이섬유의 철분결합력에 관한 in vitro 연구)

  • 계수경
    • Korean journal of food and cookery science
    • /
    • v.13 no.4
    • /
    • pp.472-477
    • /
    • 1997
  • Iron was bound to neutral detergent fiber (NDF) obtained from 15 kinds of vegetables commonly consumed in Korea. Iron binding capacity of NDF ranged from 37.83% to 85.51%, and it increased as the pH increased and reached to the maximum at pH 7 in all vegetables. The amount of Fe bound to NDF increased as the Fe concentration increased.

  • PDF

Alkaline Protease Hydrolysis of Chicken Liver for Food Utilization (Alkaline Protease에 의한 닭 간 단백질의 분해)

  • Lee, Keun-Taik;Park, Suk-Young;Kim, Woo-Jung
    • Korean Journal of Food Science and Technology
    • /
    • v.23 no.1
    • /
    • pp.25-30
    • /
    • 1991
  • Chicken liver was enzymatically hydrolyzed with an alkaline protease and determined the optimal conditions of reaction temperature and time, pH and enzyme to substrate ratio(E/S ratio) for possible utilization as a protein supplementary ingredient. The functional properties of hydolysate measured were water and oil absorption capacity, emulsifying activity and viscosity and sensory properties were also evaluated. It was found that hydrolysis at $60^{\circ}C$ and pH 8.0 were most effective and the degree of hydrolysis increased with increasing E/S ratio. A decrease in water and oil absorption capacity and an increase in viscosity were found during hydrolysis. The lowest emulsifying activity and highest water absorption were measured for 1/2 hour-hydrolysate and little difference was found for those treated more than 1 hour. The sensory characteristics of odor showed no significant difference among the chicken liver hydrolysates while the brightness increased and red decreased significantly(p<0.01) as the hydrolysis proceeded.

  • PDF

Ditribution of silicon and growth inhibition of powdery mildew fungus in cucumber leaves in silicon-present hydroponic culture (규소 처리에 의한 오이잎의 규소분포 및 흰가루병균 생장억제)

  • Lee, Jung-Sup
    • The Korean Journal of Pesticide Science
    • /
    • v.4 no.2
    • /
    • pp.44-49
    • /
    • 2000
  • Objective of this study was to determine the Si distribution and extent of control of powdery mildew diseases of cucumber(Cucumis sativus L.). The distribution of silicon in the leaf epidermis of cucumber plants grown in hydroponic nutrient solutions supplemented with soluble silicates was examined using scanning electron microscopy and energy dispersive X-ray analysis. The silicate absorbed from nutrient solution was translocated into cucumber leaves, and accumulated mainly in the cells surrounding the base of trichome hairs. Base cells surrounding the trichomes also had high levels of Si, Ca, and K. Si levels in the epidermal cells for low Si treatment were not detectable except in the trichome bases. Hyphal lengths of powdery mildew occurring on cucumber leaves cultivated in medium with high concentration of silicate were remarkably shorter than those of cucumber leaves cultivated with low concentration of silicate. There was a negative correlation between hyphal length of S. fuliginea and silicate concentrations.

  • PDF

Complete denture treatment using lingualized occlusion scheme at the edentulous patient with severely absorbed flat residual ridges: a case report (심한 치조골 흡수로 인해 편평한 치조제를 보이는 완전 무치악 환자에서 설측 교두 교합을 이용한 의치 수복 증례)

  • Choi, Bum-Shik;Lee, Joon-Seok
    • Journal of Dental Rehabilitation and Applied Science
    • /
    • v.33 no.3
    • /
    • pp.207-215
    • /
    • 2017
  • Many factors should be considered for successful denture treatment at edentulous patients: support, retention, stability, occlusion, esthetics, etc. The patient who has severely absorbed residual ridges, however, treatments are challenging to satisfy those factors. The dentures that use anatomic artificial teeth show good mastication efficiency and esthetics but, can easily lose stability at absorbed ridges. On the contrary, the dentures that use non-anatomic artificial teeth perform better stability but, lower masticatory efficiency and esthetics at absorbed ridges. The lingualized occlusion, using both anatomic and non-anatomic teeth, introduced for compromise those of the pros and cons. At lingualized occlusion, buccal cusps of the teeth do not contact on centric relation. Therefore, direction of the occlusal force towards lingually, then stability of dentures increases. This case report shows the results of the treatment flat residual ridges using complete dentures with ligualized occlusion to increase dentures stability and satisfactory of the patient.

Effect of Gamma Irradiation on Water Uptake Rate and Gelatinization of Brown Rice (감마선 조사가 현미의 수화속도 및 호화양상에 미치는 영향)

  • Lee, You-Seok;Shu, Chung-Sik;Lee, Ju-Woon;Byun, Myung-Woo
    • Korean Journal of Food Science and Technology
    • /
    • v.36 no.6
    • /
    • pp.900-904
    • /
    • 2004
  • Effects of gamma irradiation on brown rice quality were evaluated. Brown rice was irradiated at absorbed dose of 1, 3 or 5 kGy, and ground. Water uptake, pasting properties, and physicochemical characteristics of flour samples were tested. Water uptake rates of irradiated samples were higher than that of control, and were dose-dependent. Hydration capacity decreased in sample irradiated at 5 kGy due to leaching out of soluble compounds, whereas no differences were observed among other irradiated samples and control. Irradiation significantly decreased pasting properties as determined by amylograph. Gamma irradiation accelerated water evaporation at high temperatures (over $300^{\circ}C$) in test of weight-loss profile with thermogravimetric analyzer.

비허대서흡수공능적개변급운비치료적작용연구(脾虛大鼠吸收功能的改變及運脾治療的作用硏究) -비허(脾虛)의 동물모델 Rat의 흡수력 변화 및 운비법(運脾法)의 치료효과에 대한 연구

  • Son Won-Ryeong;Hae Jeong-Gun;Chuk Myeong-Geol;Ju Wi
    • The Journal of Pediatrics of Korean Medicine
    • /
    • v.15 no.1
    • /
    • pp.255-259
    • /
    • 2001
  • 본 연구는 운비요법(運脾療法)이 脾虛 동물모델 Rat의 흡수기능에 미치는 영향을 관찰하기 위한 것이다. 이혈평(利血平)으로 Rat의 비허(脾虛) 상태를 유발시킨 다음 최초로 비허(脾虛) 상태에서의 혈청 중 Zn 및 소장검막의 구조변화를 관찰하였고, 임상적으로는 소아의 편식증, 영양실조성 빈혈, 반복적인 소아감염증상(RRI) 등에 대한 운비법(運脾法)의 효과를 관찰하였다. 청결상태로 관리한 체중이 220-240g의 Wester계 웅성 Rat 15마리를 무작위로 각 5마리씩 정상군, 비허군(脾虛群), 중약투여군에 배분하여 3group으로 나누었다. 비허군과 중약투여군에는 모두 이혈평(利血平)을 소량으로 서서히 투여하였고, 중약투여군에는 동시에 중약 시럽(당장(糖漿))을 경구투여시켜 3주간 실험관찰하였다. 결과 : (1) 섭취량(g/일/마리) : 정상군은 22.1, 비허군(脾虛群)은 9.04, 중약투여군은 17.3으로 각각 나타났다. (2) 체중(g) : 정산군은 $284.2{\pm}32.51$, 비허군(脾虛群)은 $193{\pm}15.26$, 중약투여군은 $231.8{\pm}22.76$으로 각각 측정되었다. (3) 혈청 중 Zn함량(ug/1) : 정상군 $1911{\pm}993.8$, 비허군(脾虛群) $1094{\pm}249.4$, 중약투여군 $2599.8{\pm}1282.1$로 각각 측정되었다. 이와 같은 결과에서 중약투여군의 섭취량, 체중 및 혈청 중 Zn의 함량 모두 대조군에 비교하여 현저하게 개선되었음을 알 수 있다. (4) 소장의 정막구조 : 비허군(脾虛群)은 정상군에 비해 소장의 점막이 현저하게 얇고 융모상 돌기가 오그라들며 퇴화되는 변화를 나타냈고, 일부 융모상 돌기 끝의 상피세포는 국소적 괴사 및 퇴행성 변화를 일으키기도 하였다. 중약투여군은 이에 비해 소장점막이 거의 정상에 가깝게 회복되었다. 결론 : 운비요법(運脾療法)은 비허(脾虛) 동물모델에 대한 흡수기능의 개선에 효과가 있음을 본 실험에서 입증할 수 있었다.

  • PDF

Hydration and Hot-water Solublilization of Milled Rice During Cooking (취반중 쌀의 수분 흡수 및 열수 가용성화 특성)

  • Kang, Kil-Jin;Lho, Il-Hwan
    • Korean Journal of Food Science and Technology
    • /
    • v.30 no.3
    • /
    • pp.502-508
    • /
    • 1998
  • The characteristics of hydration and hot-water solublilization of milled rice during cooking were investigated using Korean rice [3 varieties of Japonica type and 3 varieties of Tongil type (Japonica-Indica breeding type)]. The water uptake rate constants of Japonica type varieties during cooking were later than those of Tongil type varieties. The contents of solubles and soluble amylose among Japonica type varieties during cooking were similar, but those among Tongil type varieties were different. At the same cooking conditions, Japonica type varieties showed higher contents and leaching rate constants of solubles as well as soluble amylose than Tongil type varieties.

  • PDF

Antioxidative Characteristics of Browning Reaction Products of Glucose-Poly-${\gamma}$-Glutamate (GIu-PGA) obtained from Amino-carbonyl Reaction (Amino-carbonyl 반응에 의한 glucose-poly-${\gamma}$-glutamate (Glu-PGA) 갈변 반응물질의 항산화적 특성 연구)

  • Lee, Nam-Keun;Hahm, Young-Tae
    • Korean Journal of Food Science and Technology
    • /
    • v.37 no.5
    • /
    • pp.812-815
    • /
    • 2005
  • Effects of poly-${\gamma}$-glutamate (PGA) on antioxidative characteristics of amino-carbonyl reaction products of glucose were investigated. Rapid browning reaction was observed under heat and alkaline condition (pH 8.2). Browning products were separated by Sephadex G-50, and brown color intensity and electron-donating ability of DPPH (2,2-diphenyl-1-picrylhydrazyl) of each fraction were measured. Fraction-7 (F-7) and -20 (F-20) showed high DPPH scavenging values. UV-VIS absorption spectrum of F-20 was similar to melanoidin peak, and F-7 showed maximum absorption peak at 270 nm. Molecular weight of F-7 was over 35 kDa as determined by SDS-PAGE. Although F-20 could not be measured on SDS-PAGE, its size was smaller than F-7.

Water Absorption of Naked Barley Kernels Differing in Pearling Degrees (정맥 수율별 쌀보리의 수분흡수)

  • Park, Sung-Hee;Kim, Kwan;Kim, Sung-Kon
    • Korean Journal of Food Science and Technology
    • /
    • v.21 no.5
    • /
    • pp.601-605
    • /
    • 1989
  • Water absorption of the major kernels(7 and 10mesh sizes) of naked barley differing in pearling degrees at $25-50^{\circ}C$ was investigated. The time to reach equilibrium moisture content was reduced by half upon removal of over 20% of the outer layer of the kernel. Water absorption rate and diffusion coefficient of naked barley of 5% pearling degree at $40^{\circ}C$ were faster about 1.5 and 2.8 times than those of unpearled one. The activation energy of hydration for unpearled naked barley was 11.5kcal/mole, which was decreased by approximately 0.4kcal/mole upon increasing the pearling degree by 5%.

  • PDF

A Study on Citation Behavior of Korean Scientists Using Patent Analysis (특허분석을 통한 과학기술자의 과학논문 인용행태에 관한 연구)

  • Noh, Kyung-Ran;Han, Sang-Wan
    • Journal of the Korean Society for information Management
    • /
    • v.23 no.3 s.61
    • /
    • pp.223-239
    • /
    • 2006
  • As the fact that science is the driving force behind technological development and that technological innovation contributes to economic development has been proved empirically convincing, the interaction between science and technology is highly emphasized in advanced countries. But, Korea has not been active in conducting research on science-based technological development and on the scientific fields that have strong relationships with Korean technology. This study attempts to explore the influence of scientific research papers cited in US patents by Koreans on other US patents and identify the interactions between scientific research papers and patents, by examining the scientific references cited in the Korean-originated US patents.