检索结果-南通市图书馆

High-throughput discovery of plastid genes causing albino phenotypes in ornamental chimeric plants

Horticulture Research 2023年第1期10卷 249-259页

作者： Hyun-Seung Park Jae-Hyeon Jeon Woohyeon Cho Yeonjeong Lee Jee Young Park Jiseok Kim Young Sang Park Hyun Jo Koo Jung Hwa Kang Taek Joo Lee Sang Hoon Kim Jin-Baek Kim hae-yun kwon Suk-Hwan Kim Nam-Chon Paek Geupil Jang Jeong-Yong Suh Tae-Jin Yang Department of Agriculture Forestry and BioresourcesResearch Institute of Agriculture and Life Sciencesand Plant Genomics and Breeding InstituteCollege of Agriculture and Life SciencesSeoul National UniversitySeoul08826Republic of Korea Department of Integrative Biological Sciences and Industry Sejong UniversitySeoul 05006Korea Hantaek Botanical Garden YonginGyeonggi-do17183Republic of Korea Radiation Breeding Research Team Advanced Radiation Technology InstituteKorea Atomic Energy Research InstituteJeongeup 56212Korea Special Forest Resources Division National Institute of Forest ScienceSuwon 16631Korea School of Biological Sciences and Technology Chonnam National UniversityGwangjuSouth Korea Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences Seoul National UniversitySeoul 08826Korea

Chimeric plants composed of green and albino tissues have great ornamental *** unveil the functional genes responsible for albino phenotypes in chimeric plants,we inspected the complete plastid genomes(plastomes)in green and albino leaf tissues from 23 ornamental chimeric plants belonging to 20 species,including monocots,dicots,and *** nine chimeric plants,plastomes were identical between green and albino ***,another 14 chimeric plants were heteroplasmic,showing a mutation between green and albino *** identified 14 different point mutations in eight functional plastid genes related to plastid-encoded RNA polymerase(rpo)or photosystems which caused albinism in the chimeric *** them,12 were deleterious mutations in the target genes,in which early termination appeared due to small deletion-mediated frameshift or single nucleotide *** was single nucleotide substitution in an intron of the ycf3 and the other was a missense mutation in coding region of the rpoC2 *** inspected chlorophyll structure,protein functional model of the rpoC2,and expression levels of the related genes in green and albino tissues of Reynoutria japonica.A single amino acid change,histidine-to-proline substitution,in the rpoC2 protein may destabilize the peripheral helix of plastid-encoded RNA polymerase,impairing the biosynthesis of the photosynthesis system in the albino tissue of *** chimera plant.

关键词： plast substitution ornamental

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Prospect of developing Nd-Fe-B-type magnet with high electrical resistivity

引用

Rare Metals 2020年第1期39卷 2-12页

作者： hae-Woong kwon Min-Seok Kang Department of Materials Science and Engineering Pukyong National UniversityBusan48547Republic of Korea

Nd-Fe-B-type magnet is exclusively used as a rotor magnet in the traction motor of hybrid electric vehicle(HEV)and electric vehicle(EV),but its overly high operating temperature is a lingering problem attached to the *** major cause of the high operating temperature is eddy current,which is readily generated in the highly conductive metallic magnet under alternating magnetic field from stator *** this article,temperature rise in the Nd-Fe-B-type magnet with varying electrical resistivity under alternating magnetic field is discussed with the intention of highlighting the importance of enhancing the electrical resistivity for reducing the operating temperature of the Nd-Fe-B-type rotor *** rise in the Nd-Fe-B-type magnet(dielectric salt-added die-upset magnet)with high electrical resistivity is noticeably lower compared to the magnet(commercial sintered rotor magnet)with lower electrical resistivity,substantiating the theory that enhancing the electrical resistivity in the rotor magnet is fairly effective for suppressing the over-rise of its operating temperature during ***-upset process is revealed to be particularly pertinent for the fabrication of highly dense salt-added magnet with high electrical resistivity.

关键词： Rare-earth magnet Nd-Fe-B-type magnet Rotor magnet Operating temperature Eddy current Electrical resistivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Squeeze Cast Process Parameters on Fluidity of Hypereutectic Al-Si Alloy

引用

Journal of Materials Science & Technology 2008年第1期24卷 7-11页

作者： Jong-Kyu Baek hae-Wook kwon School of Materials Science and Engineering Yeungnam University Gyeongsan 712-749 Korea

The effects of processing variables on the fluidity of hypereutectic Al-Si alloy melt during squeeze casting were *** maximum fluidity of Al-16.0%Si alloy during squeeze casting was obtained under the applied pressure of 30 *** fluidity increased with *** fluidity increased with silicon content in the range from 12.0% to 20.0%.That was decreased respectively by eutectic modification and primary silicon refinement.

关键词： Squeeze casting Al-alloy Fluidity Melt treatment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study of material removal behavior on R-plane of sapphire during ultra-precision machining based on modified slip-fracture model

引用

Nanotechnology and Precision Engineering 2020年第3期3卷 141-155页

作者： Suk Bum kwon Aditya Nagaraj hae-Sung Yoon Sangkee Min Department of Mechanical Engineering University of Wisconsin-Madison1513 University AvenueMadisonWI 53706United States of America School of Aerospace and Mechanical Engineering Korea Aerospace University76 Hanggongdaehak-roDeogyang-guGoyang-siGyeonggi-do 10540Republic of Korea

In this paper, the modified slip/fracture activation model has been used in order to understand the mechanism of ductile-brittle transition on the R-plane of sapphire during ultra-precision machining by reflecting direction of resultant force. Anisotropic characteristics of crack morphology and ductility of machining depending on cutting direction were explained in detail with modified fracture cleavage and plastic deformation parameters. Through the analysis, it was concluded that crack morphologies were mainly determined by the interaction of multiple fracture systems activated while, critical depth of cut was determined by the dominant plastic deformation parameter. In addition to this, by using proportionality relationship between magnitude of resultant force and depth of cut in the ductile region, an empirical model for critical depth of cut was developed.

关键词： Ductile-brittle transition Crack morphology Single crystal sapphire Deformation mechanism Orthogonal cutting Ultra-precision machining

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhancement of magnetic properties of hot pressed/die-upset Dy-free Nd-Fe-B magnets with Cu/Nd coating by wet process

引用

Rare Metals 2020年第1期39卷 48-54页

作者： Jeehye kwon Dajeong Lee Dayoung Yoo Seongkyu Park Hee-Ryoung Cha hae-Woong kwon Junggoo Lee Dongyun Lee Department of Advanced Circuit Interconnection Pusan National UniversityBusan46241Republic of Korea Department of Nano Fusion Technology Pusan National UniversityBusan46241Republic of Korea Powder and Ceramics Department Korea Institute of Machinery and MaterialsChangwon51508Republic of Korea Department of Materials Science and Engineering Pukyong National UniversityBusan48513Republic of Korea Department of Nanoenergy Engineering Pusan National UniversityBusan46241Republic of Korea

A grain boundary diffusion process(GBDP)was adopted to improve magnetic properties of Dy-free highly coercive Nd-Fe-B permanent magnet by coating thin layers of Nd and Cu in grain *** GBDP of Nd and Cu,Nd and Cu were coated by wet process,e.g.,electrochemical and electroless on Nd-Fe-B magnets,which was fabricated by hot-deformed/die-upset with meltspun *** treatment was performed for 20 min at 600℃followed by several different cooling *** cooling conditions after heat treatment were varied to understand distribution and micros tructural effects of Nd and Cu species in grain *** coercivity increased from 1.565 to 1.637 T in oil cooling rate but remanence decreased,while remanence jumped with little decrease in coercivity in furnace *** tructure analyses suggested that the coercivity was closely related to the cooling rate as well as distribution of *** mechanism of coercivity enhancement due to the cooling rate was discussed based on the results presented here and those in the literature.

关键词： Magnetic materials Electrochemical deposition Diffusion Scanning electron microscopy Coercivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Velocity Profiles between Two Baffles in a Shell and Tube Heat Exchanger

引用

Journal of Thermal Science 2015年第4期24卷 356-363页

作者： Tae-Hyun Chang Chang-Hoan Lee hae-Soo Lee kwon-Soo Lee Senior Research Fellow of RESEAT Korea Institute of Science and Technology Information Korea Institute of Science and Technology Information Postdoctoral Research Fellow School of Mechanical Engineering of Kyungnam University International University of Korea

Heat exchangers are extensively utilized for waste heat recovery,oil refining,chemical processing,and steam *** this study,velocity profiles are measured using a 3D particle image velocimetry(PIV)system between two baffles in a shell and tube heat exchanger for parallel and counter *** PIV and computational fluid dynamics results show the occurrence of some strong vectors near the *** vectors are assumed due to the clearance between the inner tubes and the front ***,the major parts of the vectors are moved out through the bottom opening of the rear baffle,and other vectors produce a large circle between the two *** simulations are conducted to investigate the effects of the baffle on the heat exchanger using the Fluent *** k-εturbulence model is employed to calculate the flows along the heat exchanger.

关键词： Baffle P1V Shell and tube heat exchanger Cut off ratio CFD

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Deformation Temperature on Microstructure and Mechanical Properties of AZ31 Mg Alloy Processed by Differential-Speed Rolling

引用

Journal of Materials Science & Technology 2015年第5期31卷 498-503页

作者： Mosab Kaseem Bong kwon Chung hae Woong Yang Kotiba Hamad Young Gun Ko School of Materials Science and Engineering Yeungnam University

A differential-speed rolling(DSR) was applied to AZ31 magnesium alloy sample at different rolling temperatures of 473,523,573,and 623 K with 1-pass and 2-pass *** microstructural evolution and mechanical properties of the deformed samples were *** rolling temperature was found to be an important parameter affecting the microstructural *** DSR at 473 K,the microstructure was more homogeneous than that obtained after deformation by equal-speed rolling(ESR).The fully recrystallized microstructures were generated after DSR at 573 and 623 *** to mechanical properties,the yield strength(YS) and ultimate tensile strength(UTS) decreased monotonously with increasing rolling *** contrast,the elongation of the DSR-deformed samples was improved as the rolling temperature *** strain hardening exponent(n) calculated by Hollomon equation increased with increasing the rolling temperature,which would explain an increase in the uniform elongation.

关键词： Differential-speed rolling Magnesium alloy Mechani

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pan-TRK positive uterine sarcoma in immunohistochemistry without neurotrophic tyrosine receptor kinase gene fusions:A case report

引用

World Journal of Clinical Cases 2025年第2期13卷 39-49页

作者： Seungmee Lee Yu-Ra Jeon Changmin Shin Sun-Young kwon Sojin Shin Department of Obstetrics and Gynecology Keimyung University School of MedicineDaegu 42601South Korea Department of Pathology and Institute for Cancer Research Keimyung University School of MedicineDaegu 42601South Korea

BACKGROUND The classification of uterine sarcomas is based on distinctive morphological and immunophenotypic characteristics,increasingly supported by molecular genetic *** on neurotrophic tyrosine receptor kinase(NTRK)gene fusionpositive uterine sarcoma,potentially aggressive and morphologically similar to fibrosarcoma,are limited due to its recent ***-TRK immunohistochemistry(IHC)analysis serves as an effective screening tool with high sensitivity and specificity for NTRK-fusion *** SUMMARY We report a case of a malignant mesenchymal tumor originating from the uterine cervix,which was pan-TRK IHC-positive but lacked NTRK gene fusions,accompanied by a brief literature review.A 55-year-old woman presented to the emergency department with abdominal pain and distension,exhibiting significant ascites and multiple solid pelvic *** examination revealed a tumor encompassing the uterine cervix,extending to the vagina and uterine corpus.A punch biopsy of the cervix indicated NTRK sarcoma with positive immunochemical pan-TRK ***,subsequent next generation sequencing revealed no NTRK gene fusion,leading to a diagnosis of poorly differentiated,advanced-stage *** The clinical significance of NTRK gene fusion lies in potential treatment with TRK inhibitors for positive *** such rare tumors is crucial due to the potential applicability of tropomyosin receptor kinase inhibitor treatment.

关键词： Uterine sarcoma Cervical sarcoma Neurotrophic tyrosine receptor kinase gene fusion Next generation sequencing Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Feasible economic strategies to improve screening compliance for colorectal cancer in Korea

引用

World Journal of Gastroenterology 2005年第11期11卷 1587-1593页

作者： Sang Min Park Young Ho yun Soonman kwon Department of Family Medicine Quality of Cancer Care Branch School of Public Health

ABM: While colorectal cancer (CRC) is an ideal target for population screening, physician and patient attitudes contribute to low levels of screening uptake. This study was carried out to find feasible economic strategies to improve the CRC screening compliance in Korea. METHODS: The natural history of a simulated cohort of 50-year-old Korean in the general population was modeled with CRC screening until the age of 80 years. Cases of positive results were worked up with colonoscopy. After polypectomy, colonoscopy was repeated every 3 years. Baseline screening compliance without insurance coverage by the national health insurance (NHI) was assumed to be 30%. If NHI covered the CRC screening or the reimbursement of screening to physicians increased, the compliance was assumed to increase. We evaluated 16 different CRC screening strategies based on Markov model. RESULTS: When the NHI did not cover the screening and compliance was 30%, non-dominated strategies were colonoscopy every 5 years (COL5) and colonoscopy every 3 years (COL3). In all scenarios of various compliance rates with raised coverage of the NHI and increased reimbursement of colonoscopy, COL10, COL5 and COL3 were non-dominated strategies, and COL10 had lower or minimal incremental medical cost and financial burden on the NHI than the strategy of no screening. These results were stable with sensitivity analyses. CONCLUSION: Economic strategies for promoting screening compliance can be accompanied by expanding insurance coverage by the NHI and by increasing reimbursement for CRC screening to providers. COL10 was a cost-effective and cost saving screening strategy for CRC in Korea.

关键词： Cost-effectiveness analysis Colorectal cancer Screening Compliance National health insurance Coverage Reimbursement

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Endoplasmic reticulum stress-induced accumulation of VAMP721/722 requires CALRETICULIN 1 and CALRETICULIN 2 in Arabidopsis

引用

Journal of Integrative Plant Biology 2019年第9期61卷 974-980页

作者： Soohong Kim yunjin Choi Chian kwon Hye Sup yun Department of Molecular Biology Dankook UniversityCheonan 31116Korea Department of Biological Sciences Konkuk UniversitySeoul 05029Korea

Excessive demand for translation and protein folding in the endoplasmic reticulum(ER) can cause ER stress in plants. Here, we show that CALRETICULIN 1(CRT1) and CRT2 are critical components in the accumulation of VESICLE-ASSOCIATED MEMBRANE PROTEIN 721(VAMP721) and VAMP722 during ER stress responses. We show that CRT2 interacts with VAMP722 and that CRT1/2 post-translationally maintain elevated VAMP721/722 levels under ER *** greater growth inhibition in VAMP721/722-deficient plants, induced by tunicamycin, suggests that plants under ER stress maintain physiological homeostasis, at least in part, by regulating VAMP721/722 levels, as VAMP721/722 are known to participate in various biological processes.

关键词： Endoplasmic reticulum VAMP721/722 in Arabidopsis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：