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市乳의 貯藏期間에 따른 耐冷性 微生物 및 化學的 特性의 變化에 關한 硏究
이수원,강일수,양희진,백승천 성균관대학교 생명과학자원연구소 1997 生命資源科學硏究 Vol.4 No.1
The present study was conducted to predict shelf life of pasteurized milk with analysis of volatile compounds and sensory evaluation of milk to growth of psychrotrophic bacteria. Pseudomonas fluorescens KFRI 00194 inoculated concentration of 10^4 cfu/㎖ to observe of changes on sensory evaluation and volatile compounds of pasteurized milk. The results obtained in these experiments were summarized as follows; The psychrotrophic bacteria number at 4℃ were increased 6.39×10 exp(4)cfu/㎖ until first day and 2.20×10 exp(6)cfu/㎖, 1.17×10 exp(7)cfu/㎖ after 5 and 10days, respectively. The volatile compounds were shown the decreasing tendancies in acetaldehyde, ethanol depending on storage days, especially ethanol contents were significantly decreased between 5 and 10days storage(P<0.05). Diacetyl, 2-heptanone, 2-butanone and 3-methyl-1-butanol were shown the increasing tendencies of contents. Diacetyl, 2-heptanone and 2-butanone were significantly increased between 5 and 10days, 1 and 5days, 5 and 10days and 1 and 5days, respectively(P<0.05). However, 3-methyl-1-butanol was shown a increasing tendancy depending on storage days but the significantly different was not recognized. The changes of sensory evaluation were rapidly decrease from 6.8point first day to 4.2point after 10days and the decrease of organoleptic acceptability was significantly different recognized(P<0.05), excepted of 1 and 2days. The organoleptic acceptability according to increasing of psychrotrophic bacteria numbers were decreased. The organoleptic acceptability depending on changes of volatile compounds were shown to a conversed correlation coefficient with the exception of acetaldehyde and acetone. Especially, 2-heptanone, 2butanone and 3-methyl-1-butanol were gradually decreased of acceptability by the contents.
초고층 공동주택 거주자의 주생활 특성에 대한 기초 연구 : 거주행태, 교류행태, 적응 및 만족도를 중심으로
김혜정,이소영,이백희 대한건축학회 2005 대한건축학회논문집 Vol.21 No.2
Due to rapid economic growth from the 1960s, apartment buildings are becoming more high-storied. Having to face unfamiliar living experience and conditions, conflict situations and influence in living habits were brought about. Therefore, the following research tries to understand the change in the residents' living behavior resulted from experiences with high-rise buildings, and wishes to provide the basic data that will present the blueprint of the upright directions for urban life and super tall apartment housings, the new living form for the future. The research methods which has been used are Questionnaires. Using the SPSS/PC statistics package, analysis has been made applying Frequency, Crosstabs and X². The analysis are focused on general living patterns such as leisure time behavior, usage pattern of community facility, friendship making within the community, residential satisfaction. In result, living behavior was a distinction on age and gender, residing floors, and analysis was discussed in detail.
김윤신,이호,정유경,정익조,한백희 대한법의학회 2000 대한법의학회지 Vol.24 No.1
Paraquat is a bipyridilium nonselective contact herbicide and well-known pulmonary toxicants. Concentrated solution of paraquat may causes severe corrosive injury and multiple system organ failure. It is poorly absorbed from GI tract, but is extremely toxic and so one swallowed mouthful of Gramoxone(about 5ml) will be fatal. We experienced 3 cases of paraquat poisoning through injection and examined pathologic findings, medical records and concentration of paraquat in blood and tissues. We reviewed the mechanism of action of paraquat. pathologic changes of organ system, concentration of compound in the various organ and cause of death in autopsy cases.
Are Spinal GABAergic Elements Related to the Manifestation of Neuropathic Pain in Rat?
Lee, Jae-Hee,Back, Seung-Keun,Lim, Eun-Jeong,Cho, Gyu-Chong,Kim, Myung-Ah,Kim, Hee-Jin,Lee, Min-Hee,Na, Heung-Sik The Korean Society of Pharmacology 2010 The Korean Journal of Physiology & Pharmacology Vol.14 No.2
Impairment in spinal inhibition caused by quantitative alteration of GABAergic elements following peripheral nerve injury has been postulated to mediate neuropathic pain. In the present study, we tested whether neuropathic pain could be induced or reversed by pharmacologically modulating spinal GABAergic activity, and whether quantitative alteration of spinal GABAergic elements after peripheral nerve injury was related to the impairment of GABAergic inhibition or neuropathic pain. To these aims, we first analyzed the pain behaviors following the spinal administration of GABA antagonists ($1{\mu}g$ bicuculline/rat and $5{\mu}g$ phaclofen/rat), agonists ($1{\mu}g$ muscimol/rat and $0.5{\mu}g$ baclofen/rat) or GABA transporter (GAT) inhibitors ($20{\mu}g$ NNC-711/rat and $1{\mu}g$ SNAP-5114/rat) into naive or neuropathic animals. Then, using Western blotting, PCR or immunohistochemistry, we compared the quantities of spinal GABA, its synthesizing enzymes (GAD65, 67) and its receptors (GABAA and GABAB) and transporters (GAT-1, and -3) between two groups of rats with different severity of neuropathic pain following partial injury of tail-innervating nerves; the allodynic and non-allodynic groups. Intrathecal administration of GABA antagonists markedly lowered tail-withdrawal threshold in naive animals, and GABA agonists or GAT inhibitors significantly attenuated neuropathic pain in nerve-injured animals. However, any quantitative changes in spinal GABAergic elements were not observed in both the allodynic and non-allodynic groups. These results suggest that although the impairment in spinal GABAergic inhibition may play a role in mediation of neuropathic pain, it is not accomplished by the quantitative change in spinal elements for GABAergic inhibition and therefore these elements are not related to the generation of neuropathic pain following peripheral nerve injury.
Lee, Myoung-Ro,Shin, Hee-Eun,Back, Seon-Ok,Lee, Young-Ju,Lee, Hee-Il,Ju, Jung-Won The Korea Society for Parasitology and Tropical Me 2022 The Korean Journal of Parasitology Vol.60 No.3
The positive rate of Clonorchis sinensis is the highest among intestinal parasites in the Republic of Korea (Korea). More than 1.2 million people were at risk of C. sinensis infection in Korea in 2012. An intensive control program is being implemented for residents of the 5 major river basins to reduce helminthic infections, including C. sinensis infection. This study evaluated the continuous intensive control program for parasitic diseases including clonorchiasis in areas near the 5 major river basins in Korea over the past 10 years (2011-2020). A total of 335,020 fecal samples (one sample per resident) prepared by the modified sedimentation technic were microscopically examined. Those who expelled helminth eggs were treated with anthelmintics through local health centers and re-examined 3 months later. The overall positive rate of helminths egg was 7.1%. The annual positive rates were dramatically decreased from 14.4% (2011) to 5.9% (2020). The egg positive rate was highest in C. sinensis (5.3%), followed by heterophyid flukes (1.5%) and Trichuris trichiura (0.2%). The prevalence of C. sinensis was significantly higher in males (7.6%) than in females (3.7%), and the highest in the 50-59 years (7.0%) age group. Our results are beneficial to establish prevention and control policies against helminthiases including clonorchiasis in endemic areas in this country.
이덕희(Lee Duck-Hee),이철규(Lee Cheul Kyu),정우성(Jung Woo-Sung),김선옥(Kim Sun-ok),백민(Back Min) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
New materials are being considered for insulator of railroad vehicles. Because people want more environmental material than glass fiber, there are certain needs of finding safe and economical insulating material. We checked the flammability of some kinds insulators such as PE foam, neoprene rubber foam, melamine foam and glass fiber. You could find out the characteristics such as oxygen index, optical smoke density, toxicity index of that insulators.