http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Yong‑Min Kim,Ha‑Seung Seong,Jung‑Jae Lee,Da‑Hye Son,Jin‑Su Kim,Soo‑Jin Sa,Young‑Sin Kim,Tae‑Jeong Choi,Kyu‑Ho Cho,Joon‑Ki Hong,Jung‑Woo Choi,Eun‑Seok Cho 한국유전학회 2020 Genes & Genomics Vol.42 No.12
Background: Woori-Heukdon (KWH) is a Korean synthetic pig breed generated using Chookjin-Duroc (KCD), Chookjin-Chamdon (KCC), and their crossbreds. Currently, there is a severe lack of studies investigating the Korean breed populations including wild boars (KWB) throughout the genome. Objective: This study was performed to investigate the genetic characteristics of Korean pig populations at the genome-wide level. Methods: Using the SNP dataset derived from genotyped and downloaded datasets using the Illumina PorcineSNP60K BeadChip, we compared the genomes of 532 individuals derived from 23 pig breeds to assess the genetic diversity, inbreeding coefficient, genetic differentiation, and population structure. Results: KWB showed the lowest average expected heterozygosity (HE = 0.1904), while KWH showed the highest genetic diversity (HE = 0.02859) among Korean populations. We verified that the genetic composition of KWH, showing USD of 74.8% and KCC of 25.2% in ADMIXTURE analysis. In population structure analyses, KCC was consistently shown to be separated from other pig populations. In addition, we observed gene flow from Western pigs to a part of Chinese populations. Conclusion: This study showed that Korean native pigs, KCC have genetic differences in comparison with Chinese and Western pigs; despite some historical records and recent genetic studies, we could not find any clear evidence that KCC was significantly influenced by Chinese or Western breeds in this study. We also verified the theoretical genomic composition of KWH at the molecular level in structure analyses. To our knowledge, this is the first genomic study to investigate the genomic characteristics of KWH and KCC.
최병영,김익수,장병록,이용희 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.4
Wear of blades, buckets, plates and chisel occurred in operation of construction machinery, agricultural equipments, earthmoving equipments and offshore structures cause earlier failure of the components, resulting in the increased energy consumption, cost of maintenance and replacement. To solve the problems, advanced materials with higher resistance to abrasive wear have been attempted to make through alloy design and hot deformation followed by air cooling. 0.25C-1.4Mn-1.0Cr-0.7Ni-0.2Mo-0.08V-0.02Cu steels produced by hot forging were cooled in air to form bainite, showing higher resistance to wear than any other steels with different chemical composition in the sliding wear tests under the applied load of 74N. Higher strain hardening during sliding wear of 0.25C-1.4Mn-1.0Cr-0.7Ni-0.2Mo-0.08V-0.02Cu steels to cause microploughing wear mode seems to be one of the main reasons for showing higher resistance to wear than any other steels in this study.
CRP* 의존성 maltose 대사 촉진 유전자 sfs4의 클로닝 및 염기배열 결정
최용락,정희태,조무제,정수열 東亞大學校附設遺傳工學硏究所 1996 遺傳工學硏究 Vol.- No.3
CRP (cAMP receptor protein)은 cAMP와 결합하여 cAMP-CRP 복합체를 형성하여 전사조절의 조절인자로서 작용한다. crp 유전자에 변이를 도입하여 cAMP의 비존재 상태에서 cAMP-CRP와 비슷한 기능을 가진 crp* 유전자가 도입된 대장균 MK2001 (crp*¹, cya::km)을 숙주로 사용하여 cAMP 혹은 cGMP의 비존재하에서도 mal 유전자의 발현을 촉진시키는 유전자 sfs (sugar fermentation stimulation) 수 종을 클로닝하였다. 본 실험에서는 이미 밝혀진 nlp (Ner like protein) 유전자와 같이, sfs의 새로운 유전자를 탐색하여, 그 중 sfs4의 2126bp 전 염기배열을 결정하고, 잠정적인 sfs4의 promoter 영역에는 CRP 단백질과의 결합 DNA 공통 염기배열(5' AAT TGTGA ACACCA TCACC CGT 3')이 존재함을 확인했다. lacZ 융합 유전자를 작성하여 TP2010R1과 MK2001의 균주에서 cAMP를 첨가할 경우 각각 2.3배, 1.8배의 β-galactosidase 활성이 증가 하는 것으로 보아 sfs4는 cAMP-CRP에 의해 발현 조절을 받는 것으로 나타났다 In Escherichia coli, CRP forms a complex with cAMP and acts as a transcriptional regulator of many genes, including sugar metabolism operons. The E. coli MK2001, which is introduced the altered crp*¹, is functional in the expression of lac, ara and man, in the absence of cAMP. However, the expression of mal gene is fully activated by the addition of cAMP or cGMP. The object of the study is cloning of the sfs (sugar fermentation stimulation) genes, which was involved in regulation of mal gene expression with the altered crp*¹gene, and structural analysis and characterization of the genes at the molecular level. We have cloned 5 different E. coli genes which stimulate the maltose metabolism in a crp*¹, cya::km (MK2001) background. Newly identified genes were designated as sfs. One of the sfs genes (pPC1), located at the 53.2 min map position in the E. coli chromosome, was further analyzed. Expression of the genes, which is involved in maltose metabolism, malQ (amylomaltase), was increased to 5.8-fold in the presence of a plasmid, pAP5, containing the subcloned sfs4 gene. The nucleotide sequence of a common 2,126bp segment of the pPCM1 was determined and two open reading frames (ORF1 and ORF2) were detected. The ORF1 encodes the sfs4 gene and ORF2 encodes a truncated protein. Potential CRP binding site is located in the upstream of the putative promoter in the regulatory region. Expression of the cloned sfs4 gene was positively regulated by the cAMP-CRP complex.
충남대학교병원 마취발전의 경향에 관한 분석 : 1967년부터 - 1996년까지 from 1967 to 1996
최세진,김상수,정규돈,윤석화,신용섭,손수창,이원형,김혜자,이정은 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.2
To evaluate the specificity and historical trends of the anesthesia in Chungnam National University Hospital, anesthetic experiences of 83,572 in total performed at Chungnam National University Hospital from January 1967 to December 1996 were analyzed statistically and clinically according to age, sex, surgical department, physical status, elective and emergency surgery, premedicants, IV anesthetics, anesthetic methods, inhalational anesthetics, muscle relaxants. The results were as follows : 1. The number of cases has been steadily increased year by year. 2. The ratio of male to female was 52.8% : 47.2%. 3. According to the age, There were 44,905 cases (54%) in the group of 13-45 years. 4. According to the ASA classification of physical status, most of the cases were belonged to the class 1 & 2 (72.5%). 5. The ratio of elective to emergency was 79.4% to 20.6%. 6. Recently, glycopyrrolate has been used increasingly. 7. Thiopental sodium has been mainly used for intravenous induction agent. 8. General anesthesia has been used mainly. 9. Enflurane is the most common inhalational anesthetic agent. but Isoflurane has been used increasingly. 10. Most of muscle relaxants are Pancuronium & Vecuronium(84.5%).
하악 제3대구치와 하악관과의 위치관계에 대한 파노라마 방사선사진과 cone beam형 전산화단층영상의 비교
최형수,김규태,최용석,황의환 대한구강악안면방사선학회 2008 Imaging Science in Dentistry Vol.38 No.3
Purpose : To assess the diagnostic accuracy and value in an imaging technique field through the comparison of cone beam computed tomography and conventional panoramic radiography in assessing the topographic relationship between the mandibular canal and impacted third molars. Materials and Methods : Participants consisted of 100 patients offered the images through cone beam computed tomography and panoramic radiography. PSR-9000 Dental CT system (Asahi Roentgen Ind. Co., Ltd, Japan) was used as the unit of cone beam computed tomography. CE-II (Asahi Roentgen Ind. Co., Ltd, Japan) and Pro Max (Planmeca Oy, Finland) were used as the unit of panoramic radiography. The images obtained through panoramic radiography were classified into 3 types according to the distance between mandibular canal and root of mandibular third molar. And they were classified into 4 types according to the proximity of radiographic feature. The images obtained through cone beam computed tomography based on the classification above were classified into 4 types according to the location between the mandibular canal and the root and were analyzed. And they were classified into buccal, inferior, lingual, and between roots, according to the location between mandibular canal and root. The data were statistically analyzed and estimated by χ²-test. Results : 1. There was no statistical significance according to 3 types (type l, type ll, type lll) through CBCT. 2. The results of 4 types (type A, type B, type C, type D) through CBCT were as high prevalence of CBCT 1 in type A, CBCT 2 in type B, CBCT 3 in type C, and CBCT1 in type D and those of which showed statistical significance (P value=0.03). 3. The results according to location between mandibular canal and root through CBCT recorded each 49, 25, 17, 9 as buccal, inferior, lingual, between roots. Conclusion : When estimating the mandibular canal and the roots through the panoramic radiography, it could be difficult to drive the views of which this estimation was considerable. Thus it is required to have an accurate diagnostic approaching through CBCT that could estimate the location between mandibular canal and roots.
최진상,이용수 진주산업대학교 1999 산업과학기술연구소보 Vol.- No.6
백미원료와 대맥원료의 일반성분은 큰 차이가 없었지만, 전분가는 백미원료가 대맥원료보다 3.4% 정도 높았다. 백미원료와 대맥원료의 알콜 수율은 백미원료가 우수하였으며, 대맥원료는 산의 생성량이 많았다. 효모별 발효율은 위스키 효모인 Saccharomyces cerevisiae Suntory균이 가장 높았고, 다음으로 Sake, Mikada 및 Hansen 균의 순이었다. 원료별 고급 알콜류로서 n-propanol, iso-butanol 및 iso-amyl alcohol 등을 본석하였으며, 고급 알콜류의 생성량은 백미원료가 대맥원료보다 높았으나 생성 특성에는 큰 차이가 없었다. 효모종류별 고급 알콜류의 생성특성은 유사하였지만, 그 생성량에서는 약간의 차이가 있었다. General compositions were not difference between rice and barley, bur carbohydrate value was higher in rice than barley as above 3.4%. Alcohol ratio was better in rice than barley, but barley had higher contents in the formation of acids. Fermentation rate of yeast varieties vas best in Saccahromyces cerevisiae Suntory and the next order was Sake, Mikada and Hansen species. Higher alcohols were more in rice than in barley, but the characteristic of formation was not difference. And the formation of yeast varieties had little difference between species but the characteristic of formation was similar to four species.
고령토로부터 알루미나 추출에 관한 연구(Ⅲ):염산에 의한 추출
최세영,이용근,이희수,김형국 연세대학교 산업기술연구소 1992 논문집 Vol.24 No.1
The preparation conditions of alumina powder extracted by hydrochloric acid from domestic San-Cheong kaolin have been investigated. In order to obtain best conditions to extract alumina by hydrochloric acid, experiments carried out with various acid concentrations, reaction temperatures, reaction times, and pH. The optimum conditions were 20 wt.-% for hydrochloric aicd concentration, 100℃ for reaction temperature, 7hrs for reaction time and pH8. The yield of alumina found to be 89.2wt.-% under these conditions. Two drying methods, direct and ethanol distillation drying method to control the precipitated agglomeration have deen compared. The ethanol distillation drying method revealed more narrow particle size distribution and less agglomerate than the direct drying method.
최한규,박재용,박수진 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.A
The purpose of this study is to present quantitatively the influence of variables that had the largest effect on the changes in suspended solids(SS), which would cause turbid water phenomenon, among water quality factors of the non-point pollution source, and then to develop a multiple regression equation of SS and predict the water quality of ungaged watersheds so as to provide basic data to establish efficient management plans for SS which flow in rivers and lakes. To identify the correlation of SS with the amount of rainfall and the state of land use, a simple correlation analysis and a simple regression analysis were conducted respectively. Finally, a multiple regression analysis was conducted to provide that SS were set as dependent variables while the amount of rainfall, paddy fields and dry fields were set as independent variables. As a result, the amount of rainfall had the most significant influence on changes in SS, followed by dry fields and paddy fields. In addition, the multiple regression equation was developed to predict SS in unmeasurable watersheds.
고리 및 영광 논토양에 대한 ^137Cs의 모의 사고 침적시 토양-벼 전이계수
최용호,임광묵,박효국,최희주,이한수 대한방사선 방어학회 2002 방사선방어학회지 Vol.27 No.4
고리 및 영광 원전 반경 5km 내 11곳의 논토양을 원상대로 재배상자에 채취하여 실험 온실로 운반한 후 벼의 이식 전과 생육중에 ^137Cs을 담수의 표면에 처리하였다. 이식전 처리시 ^137Cs의 토양-작물체 전이계수(m²kg^-1-dry plant)는 토양에 따라 8배 정도의 변이를 보였고 평균은 지역간 차이가 거의 없이 쌀알의 경우 1.1 x 10^-4 , 볏짚의 경우 2.7 x 10^-4 이었다. 분얼초기 처리와 수잉기 처리시 전이계수는 이식전 처리에 비해 대체로 2∼3 배 및 15∼30 배 정도 높았다. 토양 유기물 함량과 전이계수 간에는 정의 상관이 있었다. 본 실험결과에 입각하여 우리나라 논에 대한 일회성 사고침적시 적용할 수 있는 ^137Cs 전이계수의 대표치를 침적시기별로 제안하였다. Undisturbed soil blocks were taken into culture boxes from 11 paddy fields within 5 km radii of Kori and Yonggwang NPPs and carried to a greenhouse where ^137Cs was applied to the surface of standing water before rice transplanting and during its growth. Transfer factors (m²kg^-1-dry plant) of ^137Cs applied before transplanting varied with soils by a factor of about 8. The mean was 1.1 x 10^-4 for hulled rice seeds and 2.7 x 10^-4 for straw without significant regional differences. The ^137Cs applications at the early tillering stage and booting stage resulted in, on the whole, 2∼3 and 15∼30 times, respectively, higher transfer factors than the application before transplanting. A positive correlation was found between soil organic matter and transfer factor. Generic values of transfer factors were proposed for an acute accidental deposition of ^137Cs onto Korean paddy fields in different times of the year.