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Toward neglligible memories based heterostructures charge loss in on vertically charge injection integrated 2D

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Nano Research 2016年第8期9卷 2319-2326页

作者： Dongri Qiu Dong Uk Lee Kyoung Su Lee Sang Woo Pak Eun Kyu Kim Quantum-Function Research Laboratory and Department of Physics Hanyang University Seou104763 Republic of Korea NAND Development Division NAND Product Engineering Group SK Hynix Icheon 17336 Republic of Korea

Two-dimensional （2D） crystals have a multitude of forms, including semi-metals, semiconductors, and insulators, which are ideal for assembling isolated 2D atomic materials to create van der Waals （vdW） heterostructures. Recently, artificially-stacked materials have been considered promising candidates for nanoelectronic and optoelectronic applications. In this study, we report the vertical integration of layered structures for the fabrication of prototype non-volatile memory devices. A semiconducting-tungsten-disulfide-channel-based memory device is created by sandwiching high-density-of-states multi-layered graphene as a carrier-confining layer between tunnel barriers of hexagonal boron nitride （hBN） and silicon dioxide. The results reveal that a memory window of up to 20 V is opened, leading to a high current ratio （〉103） between programming and erasing states. The proposed design combination produced layered materials that allow devices to attain perfect retention at 13% charge loss after 10 years, offering new possibilities for the integration of transparent, flexible electronic systems.

关键词： two-dimensional (2D)material graphene hexagonal boron nitride(hBN) tungsten disulphide (WS)2 heterostructure

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废瓷粉在梅子青裂纹釉的应用研究

陶瓷学报 2018年第2期39卷 170-173页

作者：董伟霞 Cho Woo Seok 包启富沈慧娟景德镇陶瓷大学江西景德镇333403 icheon branch Korea Institute of Ceramic Engineering and TechnologyIcheon-siKyeonggi-do 467-843Republic of Korea

采用韩国当地原料及废瓷粉制备梅子青裂纹釉。为了改善釉面针孔及解决当地废瓷大量堆放等问题,考察废瓷粉含量对梅子青裂纹釉的影响。研究结果表明:随着废瓷粉含量的增加,釉面的裂纹逐渐由稠密向稀疏直裂纹转化,釉面梅子青色调变淡。当... 详细信息

采用韩国当地原料及废瓷粉制备梅子青裂纹釉。为了改善釉面针孔及解决当地废瓷大量堆放等问题,考察废瓷粉含量对梅子青裂纹釉的影响。研究结果表明:随着废瓷粉含量的增加,釉面的裂纹逐渐由稠密向稀疏直裂纹转化,釉面梅子青色调变淡。当废瓷粉含量为3%时,釉面呈现交叉网状的细碎裂纹,梅子青色调并具有玉质感。这主要是由于釉中析出石英晶相,并且釉中有许多的小气泡存在,对光造成了漫反射和散射,因此釉面呈现玉质感。该研究结果不仅拓宽了废瓷粉在青瓷釉中的应用,而且利于保护环境,节约生产成本。

关键词：梅子青裂纹釉废瓷粉环保

Genome-wide association study identifies QTL for eight fruit traits in cultivated tomato (Solanum lycopersicum L.)

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Horticulture Research 2021年第1期8卷 2698-2707页

作者： Minkyung Kim Thuy Tien Phan Nguyen Joon-Hyung Ahn Gi-Jun Kim Sung-Chur Sim Department of Bioresources Engineering Sejong UniversitySeoulRepublic of Korea Asia Seed R&D center IcheonRepublic of Korea Plant Engineering Research Institute Sejong UniversitySeoulRepublic of Korea

Genome-wide association study(GWAS)is effective in identifying favorable alleles for traits of interest with high mapping resolution in crop *** this study,we conducted GWAS to explore quantitative trait loci(QTL)for eight fruit traits using 162 tomato accessions with diverse genetic *** eight traits included fruit weight,fruit width,fruit height,fruit shape index,pericarp thickness,locule number,fruit firmness,and *** variations of these traits in the tomato collection were evaluated with three replicates in field trials over three *** filtered 34,550 confident SNPs from the 51K Axiom®tomato array based on5%of minor allele frequency for association *** 162 tomato accessions were divided into seven clusters and their membership coefficients were used to account for population structure along with a kinship *** identify marker-trait associations(MTAs),four phenotypic data sets representing each of three years and combined were independently analyzed in the multilocus mixed model(MLMM).A total of 30 significant MTAs was detected over data sets for eight fruit traits at P<*** number of MTA per trait ranged from one(brix)to seven(fruit weight and fruit width).Two SNP markers on chromosomes 1 and 2 were significantly associated with multiple traits,suggesting pleiotropic effects of ***,16 of 30 MTAs suggest potential novel QTL for eight fruit *** results facilitate genetic dissection of tomato fruit traits and provide a useful resource to develop molecular tools for improving fruit traits via marker-assisted selection and genomic selection in tomato breeding programs.

关键词： breeding traits membership

Theoretical Simulation of Surface Evolution Using the Random Deposition and Surface Relaxation for Metal Oxide Film in Atomic Layer Deposition

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Journal of Materials Science & Technology 2010年第4期26卷 371-374页

作者： Ji-Hoon Ahn Se-Hun Kwon Jin-Hyock Kim Ja-Yong Kim Sang-Won Kang Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology373-1Kusong-dongYusong-guTaejon 305-701Korea Hynix Semiconductor Incorporated San 136-1Ami-riBubal-eubIcheon-siKyongki-do467-701Korea

Atomic layer deposition （ALD） has become an essential deposition method for forming nanometer scale thin films in the microelectronics industry, and its applications have been extended to multi-component thin films, as well as to single metal oxide films. In order to investigate the development of the surface structure of ultra-thin film qualitatively as well as quantitatively, ALD processes are simulated with a molecular scale. For this simulation, the film materials are deposited on a imaginary substrate that consists of small lattice. The deposition behaviors are described by using random deposition （RD） model or random deposition with surface relaxation （RDSR） model as the ALD growth mode, and the proposed model was applied to the deposition of SrO-TiO2 thin films. Through this work, growth characteristics such as surface morphology, deposited film coverage can be predicted.

关键词： Atomic layer deposition Random deposition SrO-TiO2

Fe_2O_3对粉青裂纹釉的制备及性能影响

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中国陶瓷 2019年第1期55卷 64-69页

作者：董伟霞包启富 Cho Woo Seok 景德镇陶瓷大学材料与工程学院景德镇333001 icheon branch Korea Institute of Ceramic Engineering and Technology

主要利用韩国青瓷坯体在1270～1290℃还原气氛下制备粉青裂纹釉。考察了不同坯体种类、釉用氧化铁含量对粉青裂纹釉的影响。研究结果表明:合适的坯体应为收缩小,铁含量为1%～2%的瓷质浅灰色坯体有利于粉青釉的呈色和玉质感。随着氧化铁... 详细信息

主要利用韩国青瓷坯体在1270～1290℃还原气氛下制备粉青裂纹釉。考察了不同坯体种类、釉用氧化铁含量对粉青裂纹釉的影响。研究结果表明:合适的坯体应为收缩小,铁含量为1%～2%的瓷质浅灰色坯体有利于粉青釉的呈色和玉质感。随着氧化铁含量的增加,釉面由白色、粉青色、绿色最后逐渐向黄色色调过渡,并且釉面的裂纹逐渐由稠密向稀疏直裂纹转化。当氧化铁含量为0.020 mol时,由于釉面吸收了红光而反射出蓝绿光,因此釉面呈现粉青色(L*=65.18, a*=-6.67, b*=1.63)。从XRD和SEM结果可知:韩国青瓷坯体结构致密,釉面中存在很多细小结构的微气泡和未被溶解的石英相对光造成漫发射,从而赋予了釉面玉质感。

关键词：韩国青瓷坯体仿龙泉青瓷粉青裂纹釉氧化铁

Application of an aerosol electrical mobility spectrum analyzer: Charged-particle polarity ratio measurement in the Antarctic and Arctic regions

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Journal of Environmental Sciences 2021年第7期33卷 81-89页

作者： Handol Lee Hyeok Chung Kang-Ho Ahn Department of Environmental Engineering Inha University100 Inha-roMichuhol-guIncheon 22212South Korea Aerosol Research and Technology Plus(ART+) 195-62Daepyeong-roDaewol-myeonIcheonGyunggi-do 17343South Korea Department of Mechanical Engineering Hanyang UniversityERICA55 Hanyangdaehak-roSangnok-guAnsan 15588South Korea

An aerosol electrical mobility spectrum analyzer(AEMSA),developed at Hanyang University,was employed to investigate the particle charge characteristics in the Antarctic and Arctic *** particle charge characteristics in these areas were compared with the charging state in Ansan,South Korea,located in the midlatitude,where artificial factors,such as human activity,urbanization,and traffic,might result in a higher total ***,in Ansan,South Korea,the charged-particle polarity ratio was very stable and was close to ***,notably different particle charge characteristics were obtained in the Antarctic and Arctic *** imbalance between the numbers of positively and negatively charged particles was evident,resulting in more positive charges on the atmospheric *** average,the positively charged particle concentrations in the Antarctic and Arctic areas were 1.4 and 2.8 times higher,respectively,compared with the negatively charged *** developed AEMSA system and the findings of this study provide useful information on the characteristics of atmospheric aerosols in the Antarctic and Arctic regions and can be further utilized to study particle formation mechanisms.

关键词： Aerosol electrical mobility spectrum analyzer Antarctic Arctic Charged-particle polarity ratio

Gene editing of authentic Brassica rapa flavonol synthase 1 generates dihydroflavonol-accumulating Chinese cabbage

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Horticulture Research 2023年第12期10卷 58-69页

作者： Sangkyu Park Hyo Lee Jaeeun Song Chan Ju Lim Jinpyo Oh Sang Hoon Lee Saet Buyl Lee Jong-Yeol Lee Sunhyung Lim Jin A.Kim Beom-Gi Kim Metabolic Engineering Division National Institute of Agricultural SciencesRural Development AdministrationJeonju54874South Korea Institute of Biotechnology and Breeding Asiaseed Inc.Icheon17414South Korea Food and Nutrition Division National Institute of Agricultural SciencesRural Development AdministrationWanju55365South Korea Department of Horticultural Biotechnology School of BiotechnologyHankyong National UniversityAnseong17579South Korea

Flavonols are the major class of flavonoids of green Chinese cabbage(Brassica rapa ***).The *** genome harbors seven flavonol synthase genes(BrFLSs),but they have not been functionally ***,transcriptome analysis showed four BrFLSs mainly expressed in Chinese *** them,only BrFLS1 showed major FLS activity and additional flavanone 3β-hydroxylase(F3H)activity,while BrFLS2 and BrFLS3.1 exhibited only marginal F3H *** generated BrFLS1-knockout(BrFLS1-KO)Chinese cabbages using CRISPR/Cas9-mediated genome editing and obtained transgene-free homozygous plants without off-target mutation in the T1 generation,which were further advanced to the T2 generation showing normal ***-ESI-QTOF-MS analysis revealed that flavonol glycosides were dramatically decreased in the T2 plants,while dihydroflavonol glycosides accumulated concomitantly to levels corresponding to the reduced levels of *** PCR analysis revealed that the early steps of phenylpropanoid and flavonoid biosynthetic pathway were upregulated in the BrFLS1-KO *** accordance,total phenolic contents were slightly enhanced in the BrFLS1-KO plants,which suggests a negative role of flavonols in phenylpropanoid and flavonoid biosynthesis in Chinese *** surveys revealed that the BrFLS1-KO Chinese cabbages showed normal head formation and reproductive phenotypes,but subtle morphological changes in their heads were *** addition,their seedlings were susceptible to osmotic stress compared to the controls,suggesting that flavonols play a positive role for osmotic stress tolerance in *** *** this study,we showed that CRISPR/Cas9-mediated BrFLS1-KO successfully generated a valuable breeding resource of Chinese cabbage with distinctive metabolic traits and that CRISPR/Cas9 can be efficiently applied in functional Chinese cabbage breeding.

关键词： steps slightly phenolic

Vitamin A supplementation downregulates ADH1C and ALDH1A1 mRNA expression in weaned beef calves

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Animal Nutrition 2022年第3期10卷 372-381页

作者： Xue Cheng Jin Dong Qiao Peng Seong Jin Kim Na Yeon Kim Jalil Ghassemi Nejad Danil Kim Stephen B.Smith Hong Gu Lee Department of Animal Science and Technology Sanghvi College of Life SciencesKonkuk UniversitySeoul 05029Republic of Korea Asia Pacific Ruminant Institute Icheon 17385Republic of Korea Farm Animal Clinical Training and Research Center Institute of Green-Bio Science and TechnologySeoul National UniversityPyeongchang 25354Republic of Korea Department of Animal Science Texas A&M UniversityCollege StationTX 77843USA

Our previous studies demonstrated that oral vitamin A supplementation during late-stage pregnancy and the neonatal stage enhances birth weight,growth performance,and mRNA expression related to muscle and preadipocyte development in beef *** alcohol dehydrogenase 1C(ADH1C)c.-64T>C genotype also correlated with vitamin A concentration in beef *** study aimed to investigate the effects of vitamin A supplementation on the muscle development and vitamin A metabolism in weaned beef calves with different ADH1C *** male calves(90 d of age;initial BW:89.03 kg[SD 8.60])were stratified according to ADH1C genotype and vitamin A treatment(duration:3 months)and randomly assigned to 4 groups with a 22 factorial *** A treatments included the following:control(10,000 IU/kg of as-fed,*** type;*** type);treatment(40,000 IU/kg of as-fed,*** type;and *** type).Parameters including BW,FI,blood,longissimus dorsi muscle,and liver status during the experimental period were analyzed using the generalized linear model(GLM)procedure and Tukey's test by SAS 9.4 *** vitamin A was significantly increased(P<0.05)in the vitamin A treatment group at 4 and 6 months of *** type calves showed higher serum vitamin A concentration(P<0.05)than the TC type *** triglyceride and non-esterified fatty acid(NEFA)levels increased(P<0.05)in the treatment group compared with the control at 6 months of ***,BW,ADG and FI showed no differences between the *** addition,mRNA expression in longissimus dorsi muscle revealed upregulation of paired box 7(PAX7)(P<0.05)after the vitamin A treatment period based on biopsy *** ADH1C and aldehyde dehydrogenase(ALDH)1A1 mRNA expression was downregulated(P<0.01)by vitamin A *** TC type of ADH1C showed higher mRNA expression than the TT ***,no effect was observed on adipogenic mRNA expression(preadipocyte factor-1[PREF-1],peroxisome proliferator-activated rece

关键词： Vitamin A ADH1C genotype Muscle development Korean native calves

Functional photonic structures for external interaction with flexible/ wearable devices

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Nano Research 2021年第9期14卷 2904-2918页

作者： Young Jin Yoo Se-Yeon Heo Yeong Jae Kim Joo Hwan Ko Zafrin Ferdous Mira Young Min Song School of Electrical Engineering and Computer Science Gwangju Institute of Science and Technology(GIST)123 Cheomdangwagi-roBukguGwangju 61005Republic of Korea Korea Institute of Ceramic Engineering&Technology Ceramics Test-Bed Center3321 Gyeongchung-daeroSindun-myeonIcheon-si Gyeonggi-do 17303Republic of Korea Anti-Viral Research Center Gwangju Institute of Science and Technology(GIST)123 Cheomdangwagi-roBukguGwangju 61005Republic of Korea AI Graduate School Gwangju Institute of Science and Technology(GIST)123 Cheomdangwagi-roBukguGwangju 61005Republic of Korea

In addition to vital functions,more subsidiary functions are being expected from wearable *** wearable technology thus far has achieved the ability to maintain homeostasis by continuously monitoring physiological *** quality of life improves if,through further developments of wearable devices to detect,announce,and even control unperceptive or noxious signals from the *** materials based on photonic engineering can fulfil the abovementioned *** to the flexibility and zero-power operation of such materials,they can be applied to conventional wearables without affecting existing *** achievements to freely tailoring a broad range of electromagnetic waves have encouraged the development of wearable systems for independent recognition/manipulation of light,pollution,chemicals,viruses and ***,the role that photonic engineering on a flexible platform plays in detecting or reacting to environmental changes is reviewed in terms of material selection,structural design,and regulation mechanisms from the ultraviolet to infrared spectral ***,issues emerging with the evolution of the wearable technology,such as Joule heating,battery durability,and user privacy,and the potential solution strategies are *** article provides a systematic review of current progress in wearable devices based on photonic structures as well as an overview of possible ubiquitous advances and their applications,providing diachronic perspectives and future outlook on the rapidly growing research field of wearable technology.

关键词： photonic structure wearable device health care device colorimetric sensor radiative cooling infrared camouflage