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        • 러시아 사할린 지역의 연어치어 생산 방류의 현황

          성기백 한국양식학회 2002 韓國養殖 Vol.14 No.1

          가. 러시아 사할린 지역의 연어 부화장은 22곳으로 주로 곱사연어에 대해 어획과 인공부화방류사업을 하고 있다. 나. 대부분의 하천에서 사용하는 포획 시설은 하천 차단식 방법으로 연어를 포획하며, 초기에 소상하는 어 미는 상류로 올려 자연산란을 시키거나 가공회사에 판매를 한다. 다. 곱사연어의 연도별 어획량을 보면, 사할린지역에서는 아니바만에서 가장 많이 어획되었고 북서지역이 가장 저조하였다. 쿠릴지역에서는 이트룹섬에서 가장 많이 어획되었고 1997년이 97,763톤으로 가장 많이 어획되었다. 라. 연어의 어획량을 보면, 1995년의 경우 2.702톤으로 곱사연어 어획량의 약 3%이고 1999년은 5,778톤으로 6%밖에 되지 않아 사할린 지역의 경우 곱사연어의 어획이 주로 이루어짐을 알 수 있다. 마, 곱사연어의 방류량은 1999년을 제외하고는 매년 3억마리 이상이고, 연어는 2억마리 이상을 방류한다.

        • 한국 연어자원의 회유와 서식환경의 장기 변동

          성기백,김진영,박차수,강영실 한국수산자원학회 2001 한국수산자원학회지 Vol.4 No.-

          한국 하천 연어자원의 회유현황을 연구하기 위하여 1984-2001년간 강원도 양양 남대천의 연어 치어 방류량 및 회유량 변동과 환경요인과 관련한 생물학적 특성을 비교하였다. 양양 남대천의 연어 회유량은 1990년대부터 치어 방류량의 증가와 함께 회유량도 증가하였다. 연어의 회유시기를 보면, 1980년대는 11월 중순, 1990년대는 11월 초순에 회유하는 비율이 증가하였다. 암ㆍ수별 평균체장의 경년변동을 보면, 1980년대 암컷의 평균체장은 수컷보다 3-6cm가 더 컸으나, 1990년대에는 큰 차이를 보이지 않았다. 회유시기별 암컷의 비율은 10월 중순 이전에 20-45%로 낮았으나, 11월 중순 이후에는 37-58%로 비교적 높았다. 1990년대 초반부터 대형플랑크톤인 단각류와 유우파우지드가 증가하는 경향을 보였고, 연어 암컷의 평균체장은 암컷의 비율, 동물플랑크톤 양, 연어치어 방류량, 연어어미 어획량과 정의 상관을 보였다. Migration of chum salmon (Oncorhynchus keta) was investigated with concerning environmental condition in the eastern area of Korea during 1984-2001. Additionally, sex ratio was studied to figure out biological characteristics in association with environmental condition. Harvest of chum salmon showed a trend of increase after increasing release of juvenile fish in the Namdae River, eastern area of Korea. They strongly migrated after mid November in 1980s and before early November in 1990s. Coastal sea temperature and zooplankton biomass exhibited the increasing trend in 1990s compared with 1980s. Of zooplankton, macrozooplankton such as euphausiids and amphipods sharply increased after early 1990s. Monthly migration is positively related with coastal temperature and zooplankton biomass. The proportion of female chum salmon showed the yearly variation, 20-45% before early October and 37-58% after mid November. Density dependent effect by the artificial hatchery and releasing, and independent effect by the environmental factors were also discussed.

        • KCI등재

          사육환경과 연어치어 성장과의 관계에 관한 연구

          성기백,김주경,Seong,,Ki-Baik,Kim,,Ju-Kyung 한국해양학회 2007 바다 Vol.12 No.2

          사육지별 치어의 수용마리수는 $1,003{\sim}1,865$천마리로 큰 차이를 나타냈고, 가랑이체장은 $3.20{\sim}3.78cm$, 체중은 $0.34{\sim}0.49g$의 크기를 나타냈다. 일일 평균 사육 수온은 사육 중반기인 1월에서 3월까지의 수온은 사육 초반기와 후반기에 비해 $2{\sim}3^{\circ}C$ 정도 낮아 성장에 부적합한 수온을 보였다. pH는 2월 초순에서 중순은 $6.0{\sim}6.3$, 2월 하순은 6.5, 3월은 $6.5{\sim}7.0$을 나타냈다. 시간대별 용존산소의 변화는 오전 6시 이후 급격히 감소하였으며, $8{\sim}18$시 사이에 최저값을 보였다. 18시 이후에는 급격히 증가하였고, 21시에서 06시까지는 최대값을 보였다. 시간대별 연어치어의 폐사율을 보면, 용존산소가 높은 야간보다 급격히 하강하는 오전 및 주간에 폐사율이 5배 이상 높았다. 연어치어의 성장에 영향을 미치는 환경 요인으로는 1일 치어 1마리당 사료공급량, 사육지의 배수구 용존산소 및 사육수온이 5% 수준에서 유의한 것으로 나타났다. Early growth of chum salmon was investigated in terms of rearing pond condition. The number of fingerling showed big differences by rearing pond $1,003,000{\sim}1,865,000$. The fork length of fingerlings ranged from $3.20{\sim}3.78cm$ and body weight ranged $0.34{\sim}0.49g$. Daily temperature of rearing water in January to March was $6{\sim}8^{\circ}C$, which is inadequate for salmon growth. pH was $6.0{\sim}6.3$ in early and mid February, 6.5 in late February and $6.5{\sim}7.0$ in March. Dissolved oxygen concentration was lowest from 8 a.m. to 6 p.m. and increased after 6 p.m. The maximum value was seen from 9 p.m. to 6 a.m. The mortality of fingerlings was 5 times higher in the daytime than at night because of dissolved oxygen. Growth of fingerlings was affected by daily ration, concentration of dissolved oxygen and rearing temperature.

        • SCOPUSSCIEKCI등재

          실험적 뇌수종시 뇌실확장에 대한 국소뇌혈류 및 생체역학적 인자에 미치는 영향

          김대조,백민우,정철구,조병일,김영,조경석,성기원,박영섭,박춘근,김문찬,김달수,강준기,최창락 대한신경외과학회 1990 Journal of Korean neurosurgical society Vol.19 No.2

          To evaluate the biomechanical changes and cerebral blood flow in hydrocephalic brain, this study was designed to determine the regional cerebral blood flow(rCBF ; frontal cortex and periventricular area), the pressure volume index(PVI) and the resistance to the absorption of cerebrospinal fluid(Ro) in different stages of the kaolin-induced hydrocephalus. Fifty five 8 week-old cats, weighing 900g to l,300g were used in this experiment. The experimental animals were divided into 2 groups ; a normal control(5 cats), and kaolin-induced hydrocephalic groups(50 cats). The kaolin-induced 1,2,4,6 and 8 weeks hydrocephalic groups after intracisternal injection of the kaolin. The rCBF was measured by hydrogen clearance technique and the PVI and Ro were determined by the technique of bolus manipulation of CSF. A significant elevation of the intracranial pressure(ICP) was observed in 2 weeks after kaolin injection and peak value(ICP= 10.2±0.9 ㎜Hg) was obtained in 4 weeks after kaolin injection. The significant decreases in rCBF were revealed in both frontal cortex and periventricular area of kaolin-induced hydrocephalic cats. The PVI was significantly increased from the normal value 0.77± 0.02 ㎖ to 1.60±0.16 ㎖ at 4 weeks after kaolin injection and increased to 2.12±0.34 ㎖ at 6 weeks after kaolin injection. Ro was significantly decreased from the normal value 90.6±1.3 ㎜Hg/㎖/min to 36.8±4.3 ㎜Hg/㎖/min at 4 weeks after kaolin injection and further decreased to 62±1.9 ㎜Hg/㎖/min at 8 weeks after kaolin injection. In hydrocephalic cats, the size of the ventricle(septum pellucidum-caudate nucleus distance) continued to increase in size up to 9.40±0.7 ㎜ at the 4th weeks. However, there was no further increase in ventricular size after the 4th weeks. This study indicated that kaolin-induced hydrocephalic cats led to dramatic changes in volume-buffering capacity expressed as PVI, coupled a reduction in the Ro. The absorptive defect and loss of volume-buffering capacity are not sufficient to cause progressive ventricular enlargement. It is assuming that some microcirculatory impairment in the brain parenchyma is playing an important role which facilitates ventricular expansion with changes of biomechanical property of the brain.

        • SCOPUSSCIEKCI등재

          뇌하수체종양과 동반된 동맥류 3례

          공성택,성기원,성우현,조경석,이재수,백민우,강준기,송진언,최창락 대한신경외과학회 1990 Journal of Korean neurosurgical society Vol.19 No.6

          We report three cases of coincidental cerebral aneurysm with pituitary tumor. In our hospital the incidence of such cases was 4.4% of 68 patients with pituitary tumors from March, 1970 to Octerber, 1990. Case No. 1 was a 47-year-old female suffering from progressive loss of visual acuity. Preoperative brain C-T scan and angiographies revealed unruptured posterior communicating aneurysm with pituitary tumor. Case No. 2 was a 39-year-old male suffering from headache after head trauma with acromegaly. Preoperative brain C-T scan and angiographies appeared unruptured anterior communicating aneurysm and pituitary tumor. Case No. 3 was a 62-year-old female suffering progressive loss of visual acuity and headache. Left middle cerebral artery aneurysm and pituitary tumor were found by preoperative brain C-T scan and angiographies. All cases were operated by transcranial route and performed tumor removal after primary clipping of aneurysm. Postoperatively remained tumor of all cases was treated by radiosurgery sucessfully.

        • SCOPUSSCIEKCI등재

          척추 후부 요소들의 퇴행성 비후에 의한 흉추관 협착증 : An Analysis of 21 Surgical Cases

          홍용길,박춘근,성기원,백민우,강준기,최창락 대한신경외과학회 1990 Journal of Korean neurosurgical society Vol.19 No.2

          Twenty-two surgical cases of myelopathy due to narrow thoracic spinal canal associated with degenerative changes of the posterior spinal elements have ever been reported in the literature since Govoni presented the first cases in 1971. Authors have experienced five surgical cases and added them to the above twenty-two cases. And clinical analysis was made with twenty-one cases, which had proper data to be analysed and included our own five cases. Thirteen patients were male and the average age was around fifty-five years. Most of the lesions were found in the lower thoracic spines and involved single segment in each patient. The symptoms were so various and non-specific that pertinent treatments were delayed and the disease had been misdiagnosed in most of the patients. Intrathecal enhanced spine CT might be the most accurate diagnostic tool. Surgical decompression may produce good results, even when symptoms have been presented for years.

        • 연어의 모천회귀성에 관한 기초연구

          성기백,진덕희 강릉대학교동해안지역연구소 1999 東海岸硏究 Vol.10 No.1

          One synaptic structure which has a regulatory role in synaptic transmission in the postsynaptic density(PSD). Molecular and immunological studies have identified many regulatory proteins in the rat PSD. In this study, we have prepared PSD fractions from salmon(Chum Salmon, Oncorhynchus keta) brain(0.7g brain/3㎏ salmon). About 250㎍ of the crude PSD fraction could be prepared from an salmon brain. To study the protein composition and electrophoretic profiles, the PSD fraction prepared from salmon brains was analyzed in SDS-polyacrylamide gel electrophoresis (SDS-PAGE). When the proteins were electrophoresed in an 6% SDS-gel, about 20 major distinct protein bands of 40-200kDa could be identified with Coomassie stain. In Coomassie stain, the overall protein profiles of salmon and rat PSD fraction were similar, but the concentration of protein bands were different.

        • KCI등재
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