한우, 칡소 및 제주 흑우 Calpain-Calpastatin 유전자 다양성

이승환,김승창,조수현,최봉환,Aditi Sharma,임다정,당창권,장선식,김재환,고문석,양보석,강희설 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.2

The aim of study was to investigate genetic diversity for the calpain/calpastatin gene in three Hanwoo breeds [(Brown (n=62), Brindle (n=81) and Jeju Black (n=30)]. Random samples from three breeds of Hanwoo were selected and genotyped for the 7 SNPs of calpain/calpastatin using TaqMan method. Allele frequencies were investigated for CAPN1/CAST gene. Allele frequency of CAST2 SNP was 0.75, 0.59 and 0.22 for Brown, Brindle and Jeju black, respectively. The CAST3 revealed allele frequency of 0.59 and 0.57 in Brown and Jeju Black, while it showed very low allele frequency (0.07) in Brindle. In particular, favorable allele (G allele) for the CAPN1-2 SNP which was shown a strong association with tenderness in Taurine and Indicine cattle revealed 16% and 17% higher allele frequency in Brown Hanwoo (0.82) comparing Brindle (0.66) and Jeju Black Hanwoo (0.65). AMOVA demonstrated that among population variance occupied only 10% of total variance and among individual variance was 0%, while within individual variance was 90% of total variance. This result showed that population effect contributed very small portion of genetic to these three Hanwoo breeds, while within individual variance contributed large portion of genetic diversity within these Hanwoo breeds. In conclusion, three Hanwoo breeds (Brown, Brindle and Jeju black) showed a genetically homogeneous based on the 7 SNPs of CAPN1/CAST gene and it came from same ancestor to form modern Hanwoo breed.

생후 등줄쥐의 대뇌겉질 및 줄무늬체에서 NADPH-diaphorase 양성신경세포에 관한 연구

황승준,이종환,홍혜남,이흥식,허영범,조정식 대한해부학회 1999 Anatomy & Cell Biology Vol.32 No.1

지역별 농지가격의 변동 : 그 요인과 영향

조재환,강승원 우송대학교 1997 우송대학교 논문집 Vol.2 No.-

The objective of this study is to find out the regional farmland price determination factors and their effects on farmland price fluctuatio. The study analyzes the long run equilibrium relationship and the innovation accounting analysis of regional farmland prices and its determinating factors. This empirical result will be helpful to set up the Farmland Utilization Inprovement Program for Korean agricltural structural adjustment in the future.

구강암의 치료 후 생존율에 영향을 주는 인자에 대한 후향적 연구

조병호,민승기,오승환,이동근,김용각 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.3

The objective of this research is to find out the influencing factors to recur oral cancers. The outcomes of 85 patients(male: 62 patients, female: 23 patients) with oral cancer who were not treated any pre-operative radiotherapy, chemotherapy or previous oral surgery, other than routine dento-alveolar procedures and a recent diagnostic biopsy were analysed retrospectively. Actuarial (life tables) survival analysis showed the 5 year survival rate was 58%, 52% for male patients, 72% for female patients. The patients who were under 50 years old showed 71% of 5 year survival rate, 51% of 5 year survival rate were above 51 years old group. Patients who were treated with elective neck dissection showed better prognosis which were shown 73% of 5 year survival rate than not neck dissection which were reveal 45% of 5 year survival rate. In TNM stage of patients, advanced stage showed worse prognosis, but only N stage did not suggest to judge good prognosis. Most patients were treated under postoperative radiation therapy and showed better prognosis.

다중 제어루프에 의한 자기부상용 DC-DC 전원장치에 관한 연구

조주현,조정민,전기영,이상집,이승환,오봉환,이훈구,한경희 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

The author present a modified multi-loop algorithm including feedforward for controlling a 55kW step down chopper in the power supply of Maglev. The control law for the duty cycle consists of three terms. The first is the feedforward term which compensates for variations in the input voltage. The second term consists of the difference between the slowly moving inductor current and output current. The third term consists of proportional and integral terms involving the perturbation in the output voltage. This perturvation is derived by subtracting the desired output voltage from the actual output voltage. The proportional and integral action stabilizes the system and minimizes output voltage error. In order to verify the validity of the proposed multi-loop controller, simulation study was tried using Matlab simulink.

소뇌에 발생한 과립구성 육종 : 증례보고

윤승환,변진수,홍순기,김헌주,한용표,양재승,조미연 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.8

Granulocytic sarcoma, a rare extramedullary solid tumor arising from early myeloid precursors, is capable of invading the meninges or the brain parenchyma. The tumor may occur during or after the onset of systemic myelogenous leukemia. On rare occasions, the tumor may evolve before the onset of systemic myelogenous leukemia. Children are affected more often than adults, but sex is not related. Although no definite target area of the brain can be demonstrated, there may be some predilection of the tumor for the posterior fossa. The authors report a case of 4-year-old-boy with granulocytic sarcoma occuring in the posterior fossa presenting with gait disturbance and torticollis. The patient was treated by surgical removal of the tumor, thereby avoiding the potentially lethal complication of a posterior fassa mass. This rare case is reported together a review of the literature.

국제 쌀 가격의 동태적 분석 : 중립종과 장립종을 중심으로

양승룡,조재환 韓國農業政策學會 1997 농업경영정책연구 Vol.24 No.2

MPLS망에서 RSVP와 DiffServ연동모델의 성능분석

최승권,오구영,지홍일,신승수,조용환 충북대학교 산업과학기술연구소 2002 산업과학기술연구 논문집 Vol.16 No.1

The explosive growth of the internet traffic has imposed tremendous stress on routers, particularly, in the core network. Today's IP services reflect the unpredictable and undifferentiated packet loss and jitter characteristics of traditional best-effort routers. For above requirements, it is required not only the high-speed transmission of the packet, but the new routing function, the guarantees of QoS and bandwidth, the supports of user-requested services MPLS is proposed by the IETF and many other research institute as the solutions for this problem. In this paper, analyze performance of QoS Model applied RSVP over DiffServ to MPLS network. this model is each RSVP applied access network and DiffServ applied core network. In Result, It is amiss that basis MPLS net uses to core network because the average packet loss rate and average delay time are increased if traffic increases. Experiment result was seldom difference in case of network that apply each RSVP, DiffServ, RSVP over DiffServ. RSVP over DiffServs case packet loss rate and delay time were low than DiffServ and the packet loss rate is high because comparing than RSVP but delay time was very low.

황 첨착 활성탄에 의한 구리제거

김영환,박정훈,김정섭,유현철,이봉섭,곽명화,우성훈,박승조 東亞大學校 環境問題硏究所 2005 硏究報告 Vol.27 No.1

This study was carried out to remove copper ion in case of activated carbon impregnated sulphur(ACS) dose and different pH using activated carbon impregnated sulphur that prepared from activated carbon at sulphur dioxide atmosphere. Removal copper ion concentration was increased as increasing the ACS dose when copper ion concentration was 10 mg/L. Optimum dose of ACS 13.3 g ACS/L and maximum removal efficiency was 93%. The results obtained from adsorption experiment in the condition of ACS optimum dose when the pH was 3, 4, 5 respectively was pH 5 was excellent.

TFC을 이용한 하부 요추골에서 후방 추체간 융합술

윤승환,조준,문창택,장상근 건국대학교 의과학연구소 2000 건국의과학학술지 Vol.10 No.-

To determine which factors influence the successful results in the patients who underwent lumbar arthrodesis with TFC(threaded fusion cage) at L34 to L5S1 intervertebral space. 20 subjects were analysed in retrospective method. Between January 1997 and April 1998, interbody fusion with TFC was undergone on 20 patients, and among them, 19 patients(95% ) were confirmed to have bone fusion at 12 months after operation. All patients were classified into group A(satisfactory results) and group B(unsatisfactory results) according to comprehensive low back questionnaires from their answer. They were checked with reference to intervertebral disc height and scoliotic, and lordotic angle with Cobb's method in the anterioposterior and lateral lumbar spine films before/after operation, and TFC diameter and length were categorized. In group A, 11 cases(55%) of "excellent" results and 5 cases(25%) of "good" results were included. In group B, 2 cases(10%) of "fair" results and 2 cases (10%) of "poor" results were included. In the lateral projection of group A and B. the mean preoperative disc height were 9.88±2.69mm and 10.45±2.39mm. Twelve months after operation, the mean disc height of group A was significantly increased to 14.11±2.14mm, but that in group B was not significantly increased only to 11.50±2.52mm. Preoperatively, the measured scoliotic and lordotic angles between L1 and S1 by Cobb's method were similar in both groups, being 4.18±3.58 and 26.75±6.64 degree in the group A, 3.50±2.65 and 33.25± 13.10 degreee in the group B. Twelve months after operation, the angles for group A were significantly improved to 0 and 48.13±11.83 degree, but in group B, not changed into 4.50±4.79 and 33.75±10.31 degree. The mean diameter and length of TFC in group A were, in each, 15.62± 1.09mm and 24.44±2.39mm but, 12.50±1.00mm and 21.00±0.00mm in those of group B. For successful results after TFC interbody fusion in the lower lumbar spine, recovery of narrow disc space, scoliosis, lordosis accompanied by solid arthrodesis were necessary. The authors propose that relatively larger-sized TFC should be profitable for those cases.