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Cyclohexane과 n-heptane 混合物의 液體膜에 의한 分離
許永澤,鄭泰秀 成均館大學校 科學技術硏究所 1991 論文集 Vol.42 No.1
In the separation of cyclohexane-n-heptane mixture by emulsion-type liquid membrane, the effects of the following factors on the separation factor were studied : the ratio of volume of surfactant solution to volume of hydrocarbon mixture, surfactant concentration, stirring speed in emulsification and glycerol concentration. The results were as follows : (1) The separation of cyclohexane was most effective at the ratio of volume of surfactant solution to volume of hydrocarbon mixture of 0.6 and the contact time of 20 minutes, while it decreased as the ratio of volume of surfactant solution to volume of hydrocarbon mixture increased. (2) The separation of cyclohexane was most effecitve at the surfactant concentration of 0.6 weight per cent, the contact time of 20 minutes and the stirring speed for emulsification of 1200 rpm and the separation decreased as the surfactant concentration increased above 0.6 weight per cent as well as decreased below 0.6 weight percent. (3) The separation of cyclohexane increased as the glycerol concentration increased up to 30 weight per cent, however it decreased as the surfactant concentration increased above 30 weight per cent, and the separation was most effective at the glycerol concentration of 30 weight per cent and the contact time of 20 minutes.
괴사후성과 비괴사후성 간경변증에서 원인별 주석교질 (^99mTc-tin colloid) 간스캔의 차이
이헌영,허승식,이강욱,정현용,김삼용,신영태,김영건,노흥규 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2
The differences of the liver scintigraphic features between postnecrotic and nonpostnecrotic liver cirrhosis were studied for 69 patients. Degrees of mottling and splenomegaly were no different between two groups but shrinked form was more frequent finding in postnecrotic type(23:10), and normal shape & enlarged left lobe with shrinked right lobe were relatively dominant in non-postnecrotic group(15:6, 10:2). Grade of extrahepatic uptake of ^99mTc-tin colloid was significantly higher in Child-Pugh B & C group than A group(p<0.05), but there was no difference between postnecrotic and non-postnecrotic groups. These will be important results on the dicision for the presence of cirrhosis according to the variable causes.
Hur, Tai-Young,Jung, Young-Hun,Kang, Seog-Jin,Choe, Chang Yong,Kim, Ui-Hyung,Ryu, Il-Sun,Son, Dong-Soo,Park, Sung-Jai,Kim, Ill-Hwa The Korean Society of Veterinary Science 2011 大韓獸醫學會誌 Vol.51 No.3
The objective of this study was to evaluate the duration of retained placenta (RP) on postpartum diseases and culling in dairy cows. Data were collected from 456 Holstein cows between 2008 and 2010. RP (${\geq}$ 24 h after parturition) and postpartum diseases were diagnosed by farm managers and a veterinarian according to standardized definitions. The overall incidence rate of RP was 14.0%, and the incidence rate of RP with fourth and higher parity was two times that of cows having offspring for the first time. The duration of RP was 2 to 15 days with a mean of 6.8 days, except for cases of fourth and higher parity which had a mean of 10.5 days. A total of 63% of cows with RP had postpartum diseases. Among the cows diagnosed with RP, 23.4% developed metritis, and of those, 35.3% developed endometritis or pyometra. A total of 25% (n = 16) cows with RP were culled within 60 days in milk (DIM) and of those culled, 75% (n = 12) had postpartum diseases. These results suggest that RP increases the risk of postpartum diseases such as metritis and mastitis and is a culling hazard up to 60 DIM.
The Dairy Calves Mortality : the Causes of Death during Ten Yearsin a Large Dairy Farm
Tai Young Hur,Young–,Hun Jung,Seog–,Jin Kang,Chang yong Choe,Ui Hyung Kim,Il Sun Ryu,Dong Soo Son,Kwang Soo Baek,Kwang Seok Ki,Hyun June Lee,Eung Gi Kwon,Guk Hyun Suh,Young Il Cho 대한수의학회 2012 대한수의학회 학술대회발표집 Vol.2012 No.-
Hur, Tai-Young,Kang, Seog-Jin,Jung, Young-Hun,Lee, Hyun-June,Ki, Kwang-Seok,Choe, Chang-Yong,Suh, Guk-Hyun The Korean Society of Veterinary Science 2013 大韓獸醫學會誌 Vol.53 No.1
This study was carried out to evaluate the diagnosis of acute clinical mastitis (ACM) which was based on the vital signs and complete blood count (CBC) tests in dairy cows. Twenty eight dairy cows diagnosed with ACM, were selected for the study between Jan 2003 and July 2006 in the National Institute of Animal Science. Based on their vital signs (rectal temperature, depression, rumen contraction and, dehydration status), ACM was divided into three different classes; mild, moderate and severe forms. In addition, ACM cows were subjected to CBC tests for further diagnosis of ACM. Of the 27 dairy cows diagnosed with ACM, 3 cows were determined to have a mild form, while moderate and sever forms were each observed in twelve cows. Among of them, 4 cows died, 5 cows were culled and 18 cows were recovered. In the mild form, all haematological parameters were comparable with normal values. However, leukopenia, due to neutropenia and lymphocytopenia, appeared characteristically in the moderate and severe forms. Using the observation of vital signs in conjunction with CBC tests, the diagnosis of ACM is more accurate, and is helpful in making decisions of whether treatment or culling of dairy cows infected with ACM is most appropriate.
Side effects of treatment with busulfan at high doses in dogs
Tai-Young Hur,Seunghoon Lee,Sun-A Ock,Hyunjhung Jhun,Won-Young Lee 한국동물생명공학회(구 한국동물번식학회) 2022 Journal of Animal Reproduction and Biotechnology Vol.37 No.2
Busulfan is the most commonly used drug for preconditioning during the transplantation of hematopoietic stem cells and male germ cells. Here, we describe side effects of high doses of busulfan in male mongrel dogs. Busulfan was intravenously administered to three groups of dogs at doses of 10, 15, and 17.5 mg/kg body weight. The total white blood cell, neutrophil, eosinophil, lymphocyte, monocyte, and platelet counts steadily reduced in a dose-dependent manner following busulfan treatment. The white blood cell, neutrophil, and monocyte counts recovered after 6 weeks of busulfan treatment, however, the eosinophil, lymphocyte, and platelet counts remained unaltered. Additionally, there was one fatality in the each of the groups that were administered 15 and 17.5 mg/kg busulfan. The gross lesions included severe hemorrhage in the stomach, intestinal tracts, mesentery and urinary bladder. Microscopic investigation revealed severe pulmonary edema and hemorrhage in the lungs, and severe multifocal to coalescing transmural hemorrhage in the intestines and urinary bladder. These results indicated that treatment with busulfan at doses higher than 15 mg/kg initiates severe bleeding in the internal organs and can have fatal results.