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김세라,강현구,오기석,박인철,박상국,김성호,손창호,Kim, Se-ra,Kang, Hyun-gu,Oh, Ki-seok,Park, In-chul,Park, Sang-guk,Kim, Sung-ho,Son, Chang-ho 대한수의학회 2000 大韓獸醫學會誌 Vol.40 No.2
Serial ultrasonographic examinations were performed on pregnant Korean Jindo bitches. Measurements of inner chorionic cavity diameter and fetal head diameter were made from pregnancy day 15 to parturition. These measurements were converted retrospectively based on the day of parturition (day 0). The data of inner chorionic cavity diameter obtained from day -42 to day -25 and fetal head diameter obtained from day -24 to day -1 were used to prediction of parturition day. Formulas for the prediction of parturition day using the method of least squares were derived. These formulas were then used to predict parturition dates based on single measurements of inner chorionic cavity diameter or fetal head diameter in 17 additional pregnant Korean Jindo bitches. Predicted date of parturition was then compared to actual whelping date. In the prediction of parturition based on inner chorionic cavity diameter, 7 of 10 bitches were coincided prediction date and actual whelping date, and the prediction was accurate to within 1 day in 3 of 10 bitches. The prediction of parturition based on fetal head diameter was accurate to within 1 day in 6 of 7 bitches and within 2 days in 1 of 7 bitches. In conclusion, the ultrasound measurement of inner chorionic cavity diameter and fetal head diameter are practical and accurate tool in the prediction of parturition.
어류양식용 사료의 위생화. II. 어류양식용 사료의 조성분과 지방산화에 대한 방사선 조사 및 butylated hydroxyanisole의 효과
김세라,오헌,이해준,이종환,조성기,변명우,Lee, Hae-june,Lee, Jong-hwan,Jo, Sung-kee,Byun, Myung-woo,Kim, Sung-ho,Oh, Heon,김성호,Kim, Se-ra 대한수의학회 2001 大韓獸醫學會誌 Vol.41 No.3
The chemical composition of fish feeds(mackerel, gizzard shad, shrimp and formula feed) were analyzed and compared with those of untreated and irradiated (5 kGy) feeds, and the effects of gamma irradiation (5 kGy) and butylated hydroxyanisole (BHA, 200ppm) on feeds spoilage were investigated by determination of thiobarbituric acid (TBA) value and peroxide value for 14 days at $20^{\circ}C$, $4^{\circ}C$ or $-20^{\circ}C$. Crude protein, crude lipid, crude fiber, crude ash and nitrogen free extract were not significantly changed by gamma irradiation with the dose of 5 kGy. Immediately gamma irradiation increased the initiative oxidation of feeds as expected. But BHA was found to be greatly effective in minimizing the radiation-induced peroxidation (p<0.05). The TBA value and peroxide value increased with the elapse of the storage period. The level of lipid oxidation was increased depending on the rise in storage temperature. But the additions of BHA inhibited the lipid oxidation (p<0.05).
세포질 분열 차단 림프구를 이용한 울진원자력발전소 주변 소의 미소핵 발생 평가
김세라,강창모,김성호,Kim, Se-ra,Kang, Chang-mo,Kim, Sung-ho 대한수의학회 2004 大韓獸醫學會誌 Vol.44 No.3
Cytogenetic and hematological analysis was performed in peripheral blood of cattle in the vicinity of Uljin nuclear power station and control area. The frequency of micronuclei(MN) in peripheral blood lymphocytes from cattle was used as a biomarker of radiobiological effects resulting from exposure to environmental radiation. An estimated dose of radiation was calculated by a best fitting linear-quadratic model based on the radiation-induced MN formation from the bovine lymphocytes exposed in vitro to radiation over the range from 0 Gy to 4 Gy. MN ratio in lymphocytes of cattle from Uljin nuclear power station and control area were 8.90/1,000 and 9.60/1,000, respectively. There were no significant differences in MN frequencies and hematological values in cattle between Uljin and control area.
김세라,김태환,이해준,오헌,조성기,오기석,박인철,손창호,김성호,Kim, Se-Ra,Kim, Tae-Hwan,Lee, Hae-Jun,Oh, Heon,Cho, Sung-Ki,Oh, Ki-Seok,Park, In-Chul,Son, Chang-Ho,Kim, Sung-Ho 한국임상수의학회 2003 한국임상수의학회지 Vol.20 No.3
Cytogenetic and hematological analysis was performed in peripheral blood from the Korean native goat bred in the nuclear power plant (Wolsong and Uljin) and control area. The frequency of micronuclei (MN) in peripheral blood lymphocytes from goat was used as a biomarker of radiobiological effects resulting from exposure to environmental radiation. An estimated dose of radiation was calculated by best fitting linear-quadratic model based on the radiation-induced MN data over the range from 0 to 4 Gy from the goat lymphocytes with in vitro irradiation. MN rates in goats from the Wolsong and Uljin nuclear power plant, and control area were 9.60/1000, 6.83/1000 and 9.88/1000, respectively. There were no significant differences in MN frequencies and hematological values in goats between nuclear power plant and control area. High level of platelet in the goat from Uljin nuclear power plant was observed, which seemed to be related to the goat management.
고등학생의 입시스트레스 수준과 주관적 구강건강상태의 관련성
김세라 ( Se Ra Kim ),한수진 ( Su Jin Han ) 한국치위생과학회 2015 치위생과학회지 Vol.15 No.4
This study attempted to identify the entrance exam stress levels in high school students and analyze the relationship this entrance exam stress and perceived oral health status. Self-administered survey was conducted in total 304 students attending in academic high schools in Bucheon. For analysis, SPSS was used to perform t-test and one-way ANOVA. As a result of the study, the entrance exam stress level of academic high school students was 2.71. The level of sub-factors were that tension for exam/poor result was highest by 3.08 and the next were future uncertainty (2.81), parents pressure (2.56), and insufficient free time (2.52). The group with high entrance exam stress showed significantly high perceived degrees of temporomandibular disorder, oral mucosal disease and xerostama. Among sub-factors of stress, the group with high tension for exam/poor result stress had significantly high perceived degrees of dental caries, teporomandibular disorder, oral mucosal disease and xerostama. Because perception on oral health issues increased with high entrance exam stress in high school students, it is necessary to seek some ways to decrease oral health problems even though entrance exam stress is intensified. To do so, it is inferred that it will be very important to promote oral health education to develop ability of high school students to practice correct oral management method.
김세라,이해준,오헌,이진희,김휴경,김태환,조성기,김성호,Kim, Se-Ra,Lee, Hae-June,Oh, Heon,Lee, Jin-Hee,Kim, Hu-Kyung,Kim, Tae-Hwan,Jo, Sung-Kee,Kim, Sung-Ho 대한수의학회 2002 大韓獸醫學會誌 Vol.42 No.4
We performed this study to determine the effect of Korean favorite teas (green tea, ginseng tea, coffee and barley tea) on jejunal crypt survival, endogenous spleen colony formation and apoptosis in jejunal crypt cells of mice irradiated with high and low dose of ${\gamma}$-radiation. Jejunal crypts were protected by pretreatment of green tea (P.O.: 1.25% water extract, for 7 days before irradiation., I.P.: 50 mg/kg of body weight, at 12 and 36 hours before irradiation, p<0.01) or ginseng (I.P.: 50 mg/kg of body weight, at 12 and 36 hours before irradiation, p<0.05). Green tea (p<0.05) or ginseng (p<0.05) administration before irradiation (I.P. at 12 and 36 hours before irradiation) resulted in an increase of t formation of endogenous spleen colony. The frequency of radiation-induced apoptosis was also reduced by pretreatment of green tea (P.O.: p<0.005, I.P.: p<0.05), pretreatment of ginseng (P.O.: p<0.005, I.P.: p<0.005) or posttreatment of ginseng (I.P.: 50 mg/kg of body weight, at 30 minutes after irradiation, p<0.05). Treatment with coffee or barley tea showed no significant modifying effects on the radiation-induced damages. These results indicated that green tea and ginseng might be a useful radioprotector, especially since it is a relatively nontoxic natural product. Further studies are needed to characterize better the promotion nature of green tea, ginseng and its components.
방사선 피폭의 생물학적 선량측정에 어류(조피볼락, Sebastes schlegeli) 및 조류(닭)의 세포질분열 차단 세포 적용의 부적절성
김세라,김태환,류시윤,장종식,안미영,김성호,Kim, Se-Ra,Kim, Tae-Hwan,Ryu, Si-Yun,Jang, Jong-Sik,An, Mi-Young,Kim, Sung-Ho 대한수의학회 2002 大韓獸醫學會誌 Vol.42 No.4
The purpose of the present experiment was to investigate the micronuclei (MN) frequency in cytokinesis-blocked (CB) cells after various doses of gamma-rays in two species (fish and fowl) and so to contribute to the clarification of the question whether these species are suitable as a target organism in the test system. The frequencies of binucleated cells, and gamma-ray-induced MN in CB cells at several doses were measured in three donors of two species. No binucleated cell was noted in erythrocyte. The peaks of binucleated lymphocyte formation were found at a concentration of 2% phytohaemagglutinin (PHA) and $3{\mu}g/m{\ell}$ cytochalasin B (Cyt-B) in fish at 144 hours after incubation and 2% PHA and $6{\mu}g/m{\ell}$ Cyt-B in fowl at 72 hours after incubation. But the micronucleus counts failed to show any evidence of radiation damage. Measurements performed after irradiation showed a dose-related decrease in the formation of binucleated cells in each of the donors studied. Results indicated that the assays were not suitable for this due to blastization inhibition (binucleation failure) after irradiation. We concluded that the use of CB cell from fish and fowl for detecting the results of mdiation exposure was highly questionable.
The radioprotective effects of green tea and its fractions in Gamma-irradiated mice
김세라,이해준,김성호,Kim, Se-ra,Lee, Hae-june,Kim, Sung-ho The Korean Society of Veterinary Science 2003 大韓獸醫學會誌 Vol.43 No.4
We investigated the effect of green tea and its fractions of alcohol and polysaccharide on jejunal crypt survival, endogenous spleen colony formation, and apoptosis in jejunal crypt cells of mice irradiated with high and low dose of gamma-irradiation. Jejunal crypts were protected by pretreatment of green tea (i.p.: 50 mg/kg of body weight, at 12 and 36 hours before irradiation., p.o.: 1.25% water extract, for 7days before irradiation, p<0.01) and alcohol and polysaccharide fractions showed no significant modifying effects. Green tea and its fractions administration before irradiation (i.p. at 12 and 36hours before irradiation) resulted in an increase of the formation of endogenous spleen colony (p<0.05). The frequency of radiation-induced apoptosis in intestinal crypt cells was also reduced by pretreatment of green tea (i.p. at 12 and 36 hours before irradiation, p<0.05., p.o. for 7days before irradiation, p<0.001) and its fractions (p<0.001). These results indicated that green tea might be a useful radioprotector, especially since it is a relatively nontoxic natural product. Further studies are needed to characterize better the promotion nature of green tea and its components.
세포질 분열 차단 림프구를 이용한 월성원자력발전소 주변 소의 미소핵 발생 평가
김세라,김태환,김성호,Kim, Se-ra,Kim, Tae-hwan,Kim, Sung-ho 대한수의학회 2003 大韓獸醫學會誌 Vol.43 No.3
Cytogenetic and hematological analysis was performed in bovine peripheral blood from the regions around Wolsong nuclear power plant and control area. The frequency of micronuclei (MN) in peripheral blood lymphocytes from cattle was used as a biomarker of radiobiological effects resulting from exposure to environmental radiation. An estimated dare of radiation was calculated by a best fitting linear-quadratic model based on the radiation-induced MN formation from the bovine lymphocytes exposed in vitro to radiation over the range from 0 Gy to 4 Gy. MN rates in lymphocytes of cattle from Wolsong nuclear power plant and control area were 9.87/1,000 and 9.60/1,000, respectively. There were no significant differences in MN frequencies and hematological values in cattle between Wolsong and control area. The study indicates that the MN assay is a rapid, sensitive and accurate method that can be used to monitor a large population exposed to radiation.