• 한국가축번식학회지
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• 제11권3호
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• pp.155-160
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• 1987

This study was carried out to determine the effects of cryoprotectants, freezing and thawing rates on the survival of 8-cell mouse embryos. The female ICR mice were induced to superovulated by intraperitoneal injections of 5 i.u. PMSG and 5 i.u. HCG given 48h apart and then were paired with males of the same strain. They were killed and embryos were flushed from the oviducts and uteri on 3 days after injection of HCG. Embryos were flushed with modified Dulbecco's phosphate buffered saline and equilibrated with 1.5M-dimethyl sulfoxide (DMSO) or 1.5M-glycerol by 3-step procedure. The freezing rates of the embryos were 1$^{\circ}C$/min from room temperature to -5$^{\circ}C$ and the embryos were seeded at -5$^{\circ}C$. After being held for 3 min at the seeding temperature, the rates were 0.3$^{\circ}C$/min from -5$^{\circ}C$ to -35$^{\circ}C$. From -35$^{\circ}C$ to -7$0^{\circ}C$, the rates were divided into 0.1$^{\circ}C$/min, 1$^{\circ}C$/min and 1$0^{\circ}C$/min, respectively. After being held for 5 min at -7$0^{\circ}C$, the embryos were plunged directly into liquid nitrogen. The embryos were thawed at 4$^{\circ}C$/min and 12$^{\circ}C$/min from -196$^{\circ}C$ to 37$^{\circ}C$, and for 2 min in 37$^{\circ}C$ water bath, respectively. The average number of ovulation points and embryos recovered were 42.7 and 34 appearing 79.5% recovery rate. Eight cell embryos in the embryos recovered were 26.3. The survival rates of embryos according to the freezing rates in the presence of 1.5M-DMSO were 73.5~80.6% at 0.1$^{\circ}C$/min, 75.0~79.5% at 1$^{\circ}C$/min and 52.8~54.7% at 1$0^{\circ}C$/min, but in the presence of 1.5M-glycerol were 62.9~67.6% at 0.1$^{\circ}C$/min, 61.4~68.3% at 1$^{\circ}C$/min and 25.5~30.2% at 1$0^{\circ}C$/min. The survival rates of embryos were not affected by the thawing rates.

• 한국패류학회지
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• 제26권2호
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• pp.151-156
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• 2010

본 연구는 말백합 산업화를 위하여 어미성숙 관리한 인위성숙개체군과 시기별로 어미를 수송 채란한 자연성숙개체군을 산란유발 방법 별로 산란을 유도하여, 수정율, 부화율, D형 유생 발생률을 조사하였고, 유생사육 방법별로 유생의 성장과 생존율 등을 조사하였다. 인위성숙개체군의 간출시간별로 산란 유도한 결과 간출 4시간 및 8시간이 반응률이 23% 및 32%로 비교적 높았고, 수온 상승별로는 $28^{\circ}C$ 이상 되어야 반응이 시작되었다. 간출 및 수온상승 병행 시험구에서는 간출 4시간 및 $28^{\circ}C$에서 반응률이 45% 이상으로 나타났고, 29, 30, $31^{\circ}C$에서는 유의한 차이를 보이지 않아 말백합 어미는 간출시간보다는 수온상승에 반응률이 높은 것으로 나타났다. 어미수송개체군의 시기별 산란유발 결과는 2009년 8월 6일이 반응률 67.6%, D형 유생 발생률이 96%로 가장 높게 나타났다. 유생사육 시험 중 수온별로는 유생의 성장과 생존율을 고려할 때 유생사육 적정수온은 $27-31^{\circ}C$, 최적수온은 $29^{\circ}C$로 나타났고, 염분은 25에서 성장 및 생존율이 비교적 높았으며, 수용밀도별로는 5 inds./mL에서 성장 및 생존율이 비교적 높게 나타났음을 알 수 있었다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제38권1호
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• pp.20-28
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• 2012

Introduction: The objective of this research was to determine the incidence of oral cancer in Korea. Materials and Methods: The classifications of oral and maxillofacial cancer (OMFC) that we used are based on possible locations of OMFC: lip, tongue, mouth, salivary glands, tonsil, oropharynx, nasopharynx, hypopharynx, pharynx unspecified, and nose, sinuses. Results: 1) There were 2,848 OMFC cases, accounting for 1.6% of all cancers. The male to female ratio was 2.72:1. 2) The estimated crude rates (CRs) were 5.7 overall, 8.4 for males, and 3.1 for females. The age-standardized incidence rates (ASRs) were 4.6 overall, 7.3 for males and 2.3 for females. 3) The incidence of mouth cancer was highest. The mouth and salivary glands were the most frequent sites for cancer among males and females, respectively. 4) Patients who were 40 years or older accounted for 91% of OMFC cases, with the highest proportion of cases in the 60-69 year-old age group for both sexes. 5) Tongue cancer was the most prevalent OMFC overall. Nasopharyngeal cancer was highest among males, and salivary gland cancer was highest among females. 6) From 2004 to 2008, the relative 5-year survival rate of OMFC patients was 57.5%. There was a trend of increasing survival among OMFC patients during the study period. The survival rate for females (69.3%) was much higher than that for males (53.1%). Conclusion: Social and personal efforts should be required to increase the survival rates of OMFC patients and Korean national cancer management policy should establish new measures for economic and social management and support.

• 생태와환경
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• 제45권3호
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• pp.314-321
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• 2012

본 연구에서는 탁수농도에 따라 생물서식지에 영향을 주는 스트레스 지수를 활용하여 탁수에 대한 어류영향실험을 수행하였다. 국내 하천에서 우점비율이 가장 높은 피라미를 대상으로 발생단계별로 탁수에 대한 모의실험을 수행한 결과 발생 초기단계에서는 탁수에 대한 반응이 민감하게 나타났지만 성체단계에 이르면서 고탁수에 대한 적응하는 것으로 나타났다. 그 외 어종에 대한 탁수반응은 어종별 내성도에 따라 다르게 나타난다. 따라서 본 연구결과는 향후 수생태 건강성평가와 연계하여 하천의 건강성상태를 결정한 후, 평가등급에 따라 탁수에 대한 농도와 배출 허용기간을 적용하는데 유용한 지표가 될 것으로 기대한다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권4호
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• pp.1699-1702
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• 2014

Objective: To evaluate clinical efficacy of a dose escalating schedule of paclitaxel concurrent with radiotherapy in treating patients with locally advanced non-small cell lung (NSCLC). Methods: Patients with locally advanced NSCLC were treated with conventional fractionated radiotherapy or three dimensional conformal radiotherapy (3 DCRT), concurrently with a dose escalating schedule of paclitaxel. All patients were divided into three groups, A with paclitaxel $30mg/m^2$, B with paclitaxel $60mg/m^2$ and C with paclitaxel $90mg/m^2$. Paclitaxel was repeated every week for a total of 4 or 6 weeks. Results: Among 109 patients, response rates were 68.8%, 71.1% and 71.8% (p>0.05) for group A (n=32), B (n=38), and C (n=39) respectively. Accordingly, disease control rates were 81.3%, 81.6% and 82.1% (p>0.05). Progression-free survival time was $8.0{\pm}5.0$ months, $11.6{\pm}6.1$ months, and $14.8{\pm}7.9$ months (p<0.05), respectively. Overall survival time was $15.4{\pm}7.6$ months, $18.2{\pm}8.0$ months, and $22.0{\pm}7.6$ months (p<0.05), one-year survival rates were 62.5%, 73.1% and 90.0% (p>0.05) and two-year survival rates were 31.3%, 38.5% and 50.0% (p<0.05). Main side-effects were bone marrow suppression, radiation related esophagitis and gastrointestinal reaction. Conclusion: In treating patients with NSCLC, concurrent chemoradiotherapy with paclitaxel improves early response compared with conventional fractionated radiotherapy or 3 DCRT. The survival rate was improved with the addition of paclitaxel, but there was an increase in adverse reactions when the dose of paclitaxel was increased.

• 한국환경복원기술학회지
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• 제18권3호
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• pp.79-95
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• 2015

To suggest ecological management plans for invasion of Salix gracilistyla, stepwise environmental sieve of seed dispersal, germination, seedling and juvenile stages were investigated. About 84% of total seeds were released between May 6 and 10. Germination rates significantly declined with decrease of light intensity from 100% to 30% and 0% (p<.001), but above 60% of seeds germinated in all treatments. Difference of germination rates with 0 and 2cm water level was not significant (p = .571). With increase of elapsed time after seed dispersal, germination rates significantly decreased (p<.001), and seed viability was lost within 16 days. Considering both germination rate of seed and survival rate of seedling, survival rate of all dispersed seeds was only 5% when 8 days passed after seed dispersal. All 22-day-old seedlings (height: 1cm) died under flooding of twice level as its height. With decrease of light intensity from 100% to 30%, survival rates of seedling decreased from 90% to 33% (p<.001). In the case of 45-day-old juvenile (height: 20cm), survival rate was 70% under the water level same as its height. There was significant interactive effect of water level and light intensity on the growth of juvenile (height: p<.001, dry weight: p<.01), and survival rate of juvenile was 10% under +20cm-water level and 30%-light intensity condition. The following management plans for invasion of S. gracilistyla are recommended from these results. (1) Dry condition should be maintained at fringe of wetlands for about two weeks at seed dispersal and germination stage (early May~mid May). (2) Water level should be raised to about 5cm at fringe of wetlands for about two weeks at seedling stage (mid May~early June). (3) Water level should be raised to over 20cm at fringe of wetlands for a long time at juvenile stage. Planting trees for shading can raise management effectiveness (mid June~). (4) As water level manipulating is performed as fast as possible for controlling seedling and juvenile, management become easier and more effective.

• Radiation Oncology Journal
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• 제16권1호
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• pp.43-49
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• 1998

배경 : 담낭 및 간외 담도계 악성종양의 5년 생존율은 $10\%$ 이하로 비교적 예후가 불량한 것으로 알려져 있다. 이러한 질환에서 방사선치료가 증상 완화 및 전체 생존율을 향상시키는 것으로 알려져 있어, 본원의 환자를 대상으로 후향적 분석을 시행하여, 방사선치료의 역할을 알아보고자 하였다. 방법 : 1984년 2월부터 1995년 11월까지 인제대학교 부속 백병원 방사선종양학과에서 담낭 및 간외 담도계 악성종양으로 완치 목적의 방사선 치료를 받은 43명의 환자중 3000cGy 이하의 방사선량 을 조사받은 10명을 제외한 총 33명의 환자(담낭 악성 종양은 21명, 간외 담도계 악성종양 12명)를 대상으로 하였다. 남녀 비는 전체 11명대 22명(담낭 악성종양 4:17, 간외 담도계 악성종양 7:5)이었고, 연령분포는 35-77세(중앙값 61세)이었다. 병기별로는 IV기가 19명으로 가장 많았으며, 재발후 방사선치료를 받은 경우가 3명 포함되었다. 방사선치료는 4MV 선형가속기를 사용하여 총 31.44-54.87Gy(중앙값 44.25Gy)가 조사되었고, 3명의 환자에서는 체외조사 전후로 근접치료가 추가되었다. 방사선조사 단독치료는 6명, 수술 후 방사선 치료는 27명에서 시행되었고, 이 중 16명만이 근치적절제술을 시행받았다. 항암화학요법은 17명에서 병행되었으며 이중 11명이 Mitomycin+5-FU+Leucovorin을 사용하였다. 결과 : 총 추적관찰 기간은 2-97개월(중앙값 8.5개월)이었다. 전체 환자의 2년 생존율은 $29.9\%$, 5년 생존율은 $13.3\%$로 나타났다. 질환별로는 담낭의 경우 2년 생존율이 $34.5\%$, 간외담도계 악성종양은 $27.8\%$이었다. 수술 후 방사선치료를 시행받은 환자들의 2년 생존율은 $30.1\%$이며, 이 중 근치적 절제술을 시행받은 16명의 2년 생존율은 $43.8\%$로, 부분절제 및 우회수술후 방사선치료를 시행받은 17명의 $20.7\%$보다 높게 나타났으나 통계적 유의성은 없었다(p>0.05). 병기별로는 1, II기의 2년 생존율이 $66.6\%$, III, IV기는 $23.6\%$로 통계학적으로 유의한 차이를 나타내었다(p<0.05). ECOG에 의한 임상수행능력정도에 따른 2년 생존율은 2급과 3급이 각각 $41.9\%$, $16.7\%$로 통계학적으로 유의한 차이를 나타내었다(p<0.05). 항암화학요법을 병행한 군의 2년 생존율은 $40.5\%$로 항암화학요법을 병행하지 않은 군의 $22.6\%$ 보다 비교적 높게 나타났으나 통계적 유의성은 없었다(p>0.05). 결론 : 본 연구결과 전체 환자의 2년 생존을과 5년 생존율은 $29.9\%$와 $13.3\%$로 나타났으며, 병기가 낮고, 임상수행능력이 높을수록 생존율이 향상됨을 알 수 있었다. 또한 근치적 절제술후 방사선 치료를 받은 환자와 항암화학요법을 병행한 군의 치료성적이 비교적 높은 것으로 볼 때, 담낭 및 간외담도계 악성종양환자중 일부에서 적극적인 병합치료요법이 생존율의 향상에 도움을 줄 것으로 기대된다.

• Radiation Oncology Journal
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• 제17권4호
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• pp.275-280
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• 1999

목 적 :국소적으로 진행된 비인두암환자에서 선행보조 항암화학요법의 실행 용이성과 부작용의 정도를 평가한다. 대상 및 방법 : 77명의 조직학적으로 비인두암으로 확진 되고 이전에 치료를 받은 적이 없는 진행된 병기의 비인두암 환자들이 1984년부터 1996년까지 서울대학교병원에서 선행보조 항암화학요법과 방사선치료를 시행 받았다. 환자군의 병기분포는 다음과 같다. 1992년 AJCC 분류법에 따라 제 3 병기에 속하는 환자가 2명이었고 제 4병기에 속하는 환자가 75명이었다. 방사선치료 시행 전에 선행보조 항암화학요법으로 66명의 환자가 5-FU와 Cisplatin의 정맥 내 투여를 시행 받았고, 11명의 환자가 5-FU와 Carboplatin의 정맥 내 투여를 시행 받았다. 생존환자의 중앙추적기간은 44개월이었다. 결 과 :항암화학요법에의 반응율은 87$\%$였다. 항암화학요법의 부작용은 심하지 않았다. 3명의 환자만이 3도의 부작용을 경험하였다. 1명은 백혈구 감소증을 보였고 2명은 오심과 구토의 부작용을 보였다. 방사선에 의한 점막염도 심하지 않았는데, 10명의 환자에서 2도의 점막염이 발생하였다. 5년 생존율과 5년 무병생존율은 각각 68$\%$와 65$\%$였다. 5년 무원격전이율은 82$\%$였으며 5년 국소 치유율은 75$\%$였다. 결 론 : 선행보조 항암화학요법이 진행된 병기의 비인두암 환자에 있어서 부작용을 크게 증가시키지 않으면서 효과적인 치료방법임을 알 수 있었다.

• 한국가축번식학회지
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• 제19권2호
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• pp.135-140
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• 1995

The study was conducted to investigate on the survival rate of bisected porcine embryos co-cultured in 10% FCS(v/v)＋TCM-199 media containing hormones, oviductal epithelial cells and cumulus cells 0 to 72 hrs after bisection. In vitro survival rate was defined as development rate on in vitro culture or FDA-test. The results are summarized as follows ; 1. The survival rate of bisected porcine embryos cultrued in 10% FCS＋TCM-199 media contaning PMSG, hCG, PMSG＋hCG, hCG＋$\beta$-estradiol 0 to 20 hrs and 20 to 40 hrs were 37.6% and 37.5%, 28.6% and 28.6%, 35.7% and 28.8%, 30.8% and 23.1%, 38.5% and 30.7%, respectively. The survival rate of bisected embryos co-cultured in TCM-199 media containing hormones, oviductal epithelial cells and cumulus cells was significantly higher than that of non co-culture. 2. The survival rate of bisected porcine embryos co-cultured 10% FCS＋TCM-199 media containing oviductal epithelial cells 4 to 5 hrs and 20 to 24 hrs were 42.9% and 38.5%, respectively. 3. The survival rate of bisected porcine embryos co-cultured in 10% FCS＋TCM-199 media containing cumulus cells 4 to 5 hrs and 20 to 24 hrs were 40.0% and 35.7%, respectively.

• 한국수산과학회지
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• 제44권6호
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• pp.671-676
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• 2011

To determine the optimum light intensity for mass culture of the brackish-water cyclopoid copepod Paracyclopina nana, survival, growth, and productivity of the copepod were examined at several light intensities (0, 10, 100, 500, 1,000 lx). The survival rate of P. nana from nauplius to adult decreased with increasing light intensity. The highest survival rate was found under the dark condition, with 61.7% surviving; no significant difference was observed between 0 and 10 lx (51.7%) and the lowest survival rate was with 100 lx (26.7%). Survival rates at 500 and 1,000 lx were significantly lower in comparison with other conditions. The developmental period from nauplius to copepodid (5.8 days) and to adult (11.8 days) at 10 lx was significantly shorter than in the other treatments. Daily mean nauplius production of adult females over 7 days at 0, 10 and 100 lx was significantly higher than at 500 and 1,000 lx. In the 1,000 lx treatment, 99% of the adult females died on the $14^{th}$ day. The optimum light intensity for the mass culture of P. nana could be 10 lx, which had no adverse effects on survival, development, or reproduction.