http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
茶 침출조건에 따른 Catechin, 무기질 및 Vitamin C 함량 변화
이순재,김미지,윤연희,박규영,최원경,방진숙,부용출 대구효성가톨릭대학교 응용과학연구소 1994 응용과학연구논문집 Vol.3 No.-
본 연구에서는 실제 상용하고 있는 각 차음료가 온도, 시간 및 추출 횟수에 따른 성분의 함량의 차이를 관찰코져 시판되고 있는 한국산 녹차, 우롱차 및 홍차를 대상으로 추출방법을 달리한 후 茶浸出液중의 주요성분인 catechin, vitamin C 및 여러가지 무기질의 함량을 측정하여 다음과 같은 결과를 얻었다. 1. 차침출온도에 따른 침출액중의 catechin과 vitamin C 함량의 차이를 볼 때 온도가 높을수록 많이 추출되었다. 2. 같은 온도라는 침출시간에 따른 차이를 관찰한 결과 시간이 길수록 침출액중의 catechin과 vitamin C의 함량이 증가되었다. 3. 녹차는 우려낸 횟수에 따른 catechin의 함량 차이는 처음에 비하여 2회 추출시약 51%, 3회추출시는 71% 감소하였다. 4. 차의 각 무기원소에 따른 함량을 비교시 Mg은 우롱차가 가장 높고 K, Mn은 녹차가, Zn, Cu 그리고 Fe는 홍차가 가장 높게 나타났다. 5. 녹차, 우롱차의 경우 대체로 무기질의 침출정도가 온도가 높을수록 오히려 감소하는 경향을 나타내었고 홍차는 Mg, K을 제외하고 모두 증가하였다. 6. 각 침출액중의 대부분의 무기질 함량은 추출횟수가 증가할수록 감소하였다. 7. 시료로 사용한 녹차, 우롱차, 홍차의 vitamin C 함량은 녹차, 우롱차, 홍차의 순으로 높게 나타났다. 8. 녹차를 추출한 횟수에 따른 vitamin C 함량은 1회에 비해 2회 추출시 약 36%, 3회 추출시 약 62% 감소되었다. 9. 5g의 녹차를 80℃에서 2분간 침출한 액중에서는 catechin은 100ml당 0.34g, Mg은 2.229mg, Ca은 0.365mg, K은 39.77mg, Zn은 0.037mg, Cu은 0.010mg, Fe는 0.001mg, Mn은 0.581mg이며, vitamin C는 9.65mg이 함유되어 있었다. This study was to compare the ingredients which are contained in usual Korean teas in-depednence on leaching temperature, time and number. The main contents i.e. catechin, vi-tamin C and other minerals extracted from Korean commercial green tea, oolong tea and black tea were measured. The resluts are as follows; According to extracting temperature, the higher temperature made catechin and vitamin C extracted more. For the same leaching temperature, the longer time the more catechin and vitamin C. In case of extracting number, the contents of catechin was decreased a-bout 50% and 70% at second time and third, respectively in comparasion to the first time. For minerals from teas, management(Mg) was most in oolong tea, potassium(K)and manganease(Mn) and in green tea and iron(FEe) was in black tea respectively. Most min-erals from greentea and oolong tea were extracted less as leaching temperature was in-creased. But in black tea minerals other than Mg and K were more at increased tempera-ture. Most minerals in extractions were decreased as leaching number was increased. The content of vitamin C in the experimental samples(tea) was most in green tea, next in oo-long tea and third in black tea. In comparasion with the first extraction vitamin C was de-creased about 35% and 60% at 2nd and 3rd leach, respectively.
Current Status of the Management Program for Animal Model of Disease in an Advanced Country
Yoen Kyung Lee,Seung Eun Jung,Ji Ha Kim,Ji Eun Kim,Hyun Ku Kang,Jung Sik Cho,Jun-Gyo Suh,Dae Youn Hwang 한국실험동물학회 2009 Laboratory Animal Research Vol.25 No.1
Animal models of disease are animals that mimic the pathological condition or the disease entity of specific diseases occurring in humans. These animals are very useful to screen drugs that may be harmful, have a side effect, or would allow a better understanding of the disease mechanism. This study surveyed the current situation of animal care and use program for the Genetic Engineered Mouse (GEM) in the possession of advanced country. Also, the items of these situation involved the GEM number, the national policy and the government support system. The largest number of disease animals in the world is maintained in the USA. Specifically, the National Institute of Health (NIH) in USA supports the several institutions such as Mutant Mouse Regional Resource Centers (MMRRC), Induced Mutant Resource (IMR), Mouse Mutant Gene Resource (MMR), Special Mouse Strains Resource (SMSR) and Neuromice (NMICE) to maintain the animal models of disease. In Japan, RIKEN BioResource Center as one of several resources centers is collecting, supplying and reserving GEM involving the animal models of disease. These works were supported by National BioResource Project (NBRP) of Japanese government. Finally, the some countries in the European Union compile theEuropean Mouse Mutant Archive (EMMA) in order to effectively support and manage these animal models of disease. At present, EMMA possesses 800 kinds of GEM disease models. Therefore, these results suggested that it is very important to establish the national management program for animal model of disease, and this system must be established as soon as possible in our country.
Yoen Kyung Lee,Su Youn Yim,Seung Eun Jung,Ji Ha Kim,Ji Eun Kim,Eon Pil Lee,Hae Wook Choi,Hong Sung Kim,Jae Ho Lee,Young Jin Jung,Jung Sik Cho,Chung-Yeol Lee,Hong Joo Son,Dae Youn Hwang 한국실험동물학회 2009 Laboratory Animal Research Vol.25 No.3
Selenium (Sel) is widely distributed through the body, and performs a crucial role in the regulation of organ function. In this study, in order to determine whether Sel treatment and selenoprotein M (SelM) overexpression could affect the extracellular signal-regulated protein kinase (ERK) mitogen-activated protein kinase (MAPK) pathway, the level of ERK phosphorylation was assessed in various tissues of CMV/ EGFP-hSelM Tg rats after Sel treatment. Herein, our results demonstrated that SelM overexpression induces a slight increase in the ERK MAPK pathway in the heart, liver, and intestine, while no changes were detected in the brain, lung, and kidney. After Sel treatment, the liver and intestine evidenced higher levels of ERK activation than were induced by SelM overexpression. In particular, costimulation with SelM overexpression and Sel treatment induced a dramatic increase in the phosphorylation of ERK in the brain, heart, liver, and intestine, while a reduction in ERK phosphorylation was noted in the kidneys. The results of this study suggest that Sel and SelM may contribute to the regulation of a variety of functions via the induction of ERK phosphorylation in different organs of CMV/EGFP-hSelM Tg rats.
Current Status of Disease Model Importation from Foreign Countries into Korea
Yoen Kyung Lee,Seung Eun Jung,Ji Ha Kim,Ji Eun Kim,Hyun Ku Kang,Jung Sik Cho,Jun-Gyo Suh,Dae Youn Hwang 한국실험동물학회 2009 Laboratory Animal Research Vol.25 No.2
Animal models of disease are very useful to screen drugs that may be harmful or have clinical effect, and to better understand the disease mechanism. In this study, we survey the current situation of importation for animal models of disease from foreign countries into Korea. To do this, four companies selling a great number of animal models were chosen for search their current situations on the importation number of disease model, the importation countries and the government role. At first, the largest number of disease animals were imported from USA, followed by Japan, Europe and other countries. The number of animal model imported from foreign countries per year were about 17,300 animals. Of these models, the disease models for obesity and diabetes is the largest number as 8,400 animals, followed by cancer (4,200 animals), immune disease (2,000 animals), neurodigenerative disease (1,300 animals) and cardiovascular disease (800 animals). Also, only 50% of company thought that the use of disease animals was rapidly increase in Korea in near future. Furthermore, all of company responsed that the level of our country on the management of disease model is 40-20% compare with advanced county. Therefore, these results suggested that it is very important to establish the national management program for animal model of disease, and this system must be established as soon as possible in our country.
Fractionation of barley straw with dilute sulfuric acid for improving hemicellulose recovery
Kyung Yoen Won,오경근,엄병환,김승욱 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.5
Dilute acid fractionation of barley straw improves dissolving hemicellulose fraction of the straw, while leaving the cellulose more reactive and accessible to enzyme as a strategy of pretreatment. To characterize the fractionation process, the effects of the acid concentration, temperature and reaction time on the hemicellulose removal as well as on the formation of by-products (furfural, 5-hydroxymethylfurfural and acetic acid) were investigated. The optimum fractionation conditions of barley straw were 1% (w/v) concentration of sulfuric acid, 158 oC of reaction temperature and 15 min of reaction time. Under the optimum conditions, 87% of xylan was hydrolyzed and recovered in liquid hydrolyzate, which was 7% higher than that of the predicted yield. The hydrolyzate contained glucose 2.44 g/L, arabinose 1.70 g/L, xylose 13.41 g/L, acetic acid 1.55 g/L, levulinic acid 0.03 g/L, 5-HMF 0.03 g/L and furfural 0.75 g/L.