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전태환,반규정,김문영,곽명해,이석하 한국유전학회 2011 Genes & Genomics Vol.33 No.4
The cultivated soybean [Glycine max (L.) Merr.] is widely considered to descend from the wild soybean (G. soja Sieb. & Zucc.). This study was designed to evaluate the genetic variability and differentiation between G. soja and G. max, and to detect signatures of the selection that may have occurred during the domestication process from G. soja to G. max. A total of 192 G. soja accessions and 104 G. max accessions were genotyped using eight selected simple sequence repeat (SSR) markers assigned to three SSR groups. Four SSRs in group A were not located near any known QTL. Three SSRs in group B were associated with seed protein content, and an SSR in group C was associated with resistance to Sclerotinia stem rot. The number of alleles per locus and the level of genetic variability in G. soja were higher than those in G. max. A total of 122 out of 125 alleles were present in G. soja, but only 59 alleles were detected in G. max. The average gene diversity was 0.74 in G. soja and 0.64 in G. max. Four SSRs near QTLs of agronomic importance showed strong genetic differentiation and shift change in high frequency alleles in groups B and C between G. soja and G. max, revealing selection signatures that may reflect the domestication events and recent selective breeding. With reduced diversity in G. max, some undomesticated genes from G. soja should be prime candidates for introgression to increase the pool of diversity in G. max.
고등학교 지구과학 교과서에 제시된 판 이동의 주된 원동력에 대한 고찰
전태환,서기원,이규호 한국지구과학회 2016 한국지구과학회지 Vol.37 No.1
In the early model of plate tectonics, the plate was depicted as a passive raft floating on the convecting mantle and carried away by the mantle flow. At the same time, ridge push at spreading boundaries and drag force exerted by the mantle on the base of lithosphere were described as the dominant driving forces of plate movements. However, in recent studies of plate tectonics, it is generally accepted that the primary force driving plate motion is slab pull beneath subduction zones rather than other forces driven by mantle convection. The current view asserts that the density contrast between dense oceanic lithosphere and underlying asthenosphere is the substance of slab pull. The greater density of oceanic slab allows it to sink deeper into mantle at trenches by gravitational pull, which provides a dominant driving force for plate motion. Based on this plate tectonics development, this study investigated the contents of plate tectonics in high school Earth Science textbooks and how they have been depicted for the last few decades. Results showed that the early explanation of plate movement driven by mantle convection has been consistently highlighted in almost all high school textbooks since the 5th curriculum, whereas most introductory college textbooks rectified the early theory of plate movement and introduced a newly accepted theory in revised edition. Therefore, we suggest that the latest theory of plate tectonics be included in high school textbooks so that students get updated with recent understanding of it in a timely manner. 초기의 판 구조론에서 지각 판은 연약권 위에 떠서 맨틀의 움직임에 따라 움직이는 수동적인 모습으로 그려졌고, 자연히 해령에서 발산되는 힘이나 암석권 하부의 맨틀 견인력(drag force)이 판을 움직이는 주된 원동력으로 묘사되었다. 하지만 최근 여러 연구들은 판의 이동을 일으키는 원동력이 맨틀의 대류보다는 섭입대에서 침강하는 판이 만드는섭입판 인력(slab pull)이라고 보고 있다. 최근 학계는 무거운 해양판과 주변 연약권의 밀도 차이가 섭입판 인력의 핵심이라고 설명한다. 해양판의 높은 밀도는 중력에 의해 판이 해구에서 맨틀 속으로 가라앉는 원인이 되며, 이것이 판이움직이는 가장 큰 원동력을 발생시키는 것이다. 이러한 연구 결과들을 바탕으로, 본 연구는 고등학교 지구과학 교과서의 관련 내용을 검토하고 최근 수십 년 간의 서술 경향을 분석하였다. 그 결과 5차 교육과정 이래로 지금까지 거의 대부분의 고등학교 교과서가 맨틀 대류를 판 이동의 주 원동력으로 서술하고 있다는 것을 확인하였으며, 이는 대학교 교재가 개정판을 통해 새로운 학설을 꾸준히 제시해온 것과 대조적인 모습이라 할 수 있다. 따라서 학생들에게 더욱 정확한 학술적 정보를 제공하기 위해 이와 같은 새로운 판 구조론 내용이 해당 교과서 관련 단원에 추가되어야 할 것이다.
족관절 관절경 수술 후 발생한 전경골 동맥의 가성 동맥류
전태환,박용석,김양태,성기선,Chun, Tae-Hwan,Park, Yong-Serk,Kim, Yang-Tae,Sung, Ki-Sun 대한족부족관절학회 2012 대한족부족관절학회지 Vol.16 No.4
Pseudoaneurysm is extremely rare complication after ankle arthroscopy with standard anteromedial and anterolateral portals. We report a case of a pseudoaneurysm of the anterior tibial artery detected at 3 months after ankle arthroscopy in a 16-year-old male. He had sustained painful swelling of his right ankle after the arthroscopic surgery, and referred to our hospital with an MRI checked postoperatively. We failed to make the diagnosis of pseudoaneurysm with the postoperative MRI, thus the patient underwent another arthroscopy which revealed massive hemarthrosis within the joint. The diagnosis was confirmed with an angiography, and the vascular lesion was ligated.
전태환,이준석 한국섬유공학회 2002 한국섬유공학회지 Vol.39 No.1
Twist contraction of twisted filament yarns depended on twist factor and processing conditions in twisting. The experimental characterization of the twist contraction of several filament yarns which had different mechanical and physical properties has been carried out under different twist conditions. Spindle-drawn yam, partially oriented yam, draw textured yarn, high tenacity, and trigonal polyester filament yarn were used to characterize the twist contraction effect. The experimentally obtained twist contractions have been correlated with the parameters such as fineness, filament density, packing factor, and modulus. The twist contraction of polyester filament yarns increased with the increase in twist multiplier(T/M) and decreased with the increase in modulus. Also, twist contractions have been correlated with modulus and T/M, rather than shape factor and tenacity of filaments, considered in previous theoretical treatments. The resulting experimental equation can be used to deduce the twist contraction of filament yarns with different characteristics.
Genetic Analysis of New Short Petiole Gene in Soybean
전태환,Sung-Taeg Kang,Jung-Kyung Moon,Min-Jung Seo,Hong-Tae Yun,이석기,이영호,Si-Ju Kim 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.2
The short petiole trait is valuable for the development of plant ideotype with high yield. Soybean breeding line, SS98206SP,showed extremely short petioles in greenhouse and field. In this study, the short petiole of two mutant lines, SS98206SP and D76-1609, were investigated to determine the genetic segregations. These two mutants were crossed with each other and with two normalpetiole genotypes. Genetic analysis indicated that the short petioles in D76-1609 and SS98206SP were controlled by a single recessivegene, respectively. The short petiole gene in SS98206SP was non-allelic with lps, conferring short petiole in D76-1609. Tworecessive genes showed complementary relationship having short petioles with recessive homozygote (LPS1-lps?lps?, lps1lps1LPS?-, lps1lps1lps?lps?). Our data indicated that the short petioles in SS98206SP were controlled by a single recessive gene designated aslps3.