检索结果-南通市图书馆

Fourier transform infrared spectral features of plant biomass components during cotton organ development and their biological implications

引用

Journal of Cotton Research 2022年第2期5卷 130-142页

作者： HE Zhongqi LIU Yongliang kim hee Jin TEWOLDE Haile ZHANG Hailin Southern Regional Research Center USDA-ARSNew OrleansLA 70124USA Crop Science Research Laboratory USDA-ARSMississippi StateMS 39762USA Department of Plant and Soil Sciences Oklahoma State UniversityStillwaterOK 74078USA.

Background:The majority of attenuated total reflection Fourier transform infrared(ATR FT-IR)investigations of cotton are focused on the fiber tissue for biological mechanisms and understanding of fiber development and maturity,but rarely on other cotton biomass comp on *** work examined in detail the ATR FT-IR spectral features of various cott on tissues/organs at reproductive and maturation stages,an a lyzed and discussed their biological ***:The ATR FT-IR spectra of these tissues/organs were an a lyzed and compared with the focus on the lower wavenumber fingerprinting *** outstanding FT-IR bands at 1730,1620,1525,1235,1050 and 895 cm^(-1) represented the major C=O stretching,protein Amide I,Amide II,the O-H/N-H deformation,the total C-O-C stretching and the β-glycosidic linkage in celluloses,respectively,and impacted differently between these organs with the two growth ***,the band intensity at 1620,1525,1235,and 1050 cm^(-1) were exclusively and significantly correlated to the levels of protein(Amide I bond),protein(Amide II bond),cellulose,and hemicellulose,respectively,whereas the band at 1730 cm^(-1) was negatively correlated with ash ***:The resulting observations indicated the capability of ATR FT-IR spectroscopy for monitoring changes,transportation,and accumulation of the major chemical components in these tissues over the cotton growth *** other words,this spectral technology could be an effective tool for physiological,biochemical,and morphological research related to cotton biology and development.

关键词： Cotton Fourier transform infrared spectroscopy Fiber Cellulose Protein Plant tissue

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

Function of flavonoids on different types of programmed cell death and its mechanism:a review

引用

The Journal of Biomedical Research 2019年第6期33卷 363-370页

作者： Preethi Vetrivel Seong Min kim Venu Venkatarame Gowda Saralamma Sang Eun Ha Eun hee kim Tae Sun Min Gon Sup kim Research Institute of Life Science and College of Veterinary Medicine Gyeongsang National UniversityJinju 52828Korea Department of Nursing Science International University of KoreaJinju 52833Korea Faculty of Biotechnology SARIJeju National UniversityJeju 63243Korea

Cell death in the living system plays a vital role in maintaining the homeostasis and balancing the cell count in the *** cell death(PCD)is a crucial component of several development and defense *** is also important in terms of aging which avoids the accumulation of cellular damage by maintaining cell *** on the execution of cell death and its role in destruction,PCD is categorized into several *** major different forms of PCD in animals are apoptosis,autophagy and necrosis,which can be distinct in morphological *** intense investigations of cell death have given close insight showing other important types of cellular destruction and their pivotal roles in treating disease conditions like *** have been acquired a great interest for disease therapies and chemoprevention through activation of several PCD *** significant potential of natural flavonoids in the induction of distinct signaling cascades is being a massive approach for targeting uncontrolled cell *** these reasons,understanding PCD mechanisms is a promising approach for the interventions in treating ***,it is intriguing that understanding the different forms of PCD mechanism induced by flavonoids with more accurate descriptions on the biochemical and cellular processes are gaining more significance in cancer ***,we provide a brief overview on the different types of PCD and aim to discuss the functional role of flavonoids in promoting different types of cell death as well as an extensive brief review on their mechanism of action has been highlighted.

关键词： programmed cell death apoptosis necrosis autophagy anoikis

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

熔化极气体保护焊导电嘴载流磨损及使用寿命的研究进展

引用

材料导报 2020年第19期34卷 19128-19133,19151页

作者：栗卓新丛兴李红 kim hee Jin 北京工业大学材料科学与工程学院北京100020 韩国工业技术研究院熔焊研究组天安330-825

现代制造业要求焊接技术向智能化、连续化、绿色化发展,目前熔化极气体保护焊焊接过程中焊丝对导电嘴的磨损率过大,频繁地停工更换和清理零部件限制了熔化极气体保护焊自动化焊接的发展。电接触条件下的载流磨损是导致材料磨损率过大的... 详细信息

现代制造业要求焊接技术向智能化、连续化、绿色化发展,目前熔化极气体保护焊焊接过程中焊丝对导电嘴的磨损率过大,频繁地停工更换和清理零部件限制了熔化极气体保护焊自动化焊接的发展。电接触条件下的载流磨损是导致材料磨损率过大的重要原因,主要体现在两个方面:(1)电接触产生焦耳热,使环境温度大幅提高,局部温度甚至超过500℃,造成电接触材料发生软化;(2)电接触点的不断运动和变化导致产生微观电弧,造成局部材料的剧烈熔融和氧化。因电接触造成的电气磨损与机械磨损相互加剧,大幅缩短了导电嘴器件的使用寿命。接触电阻是产生焦耳热和微观电弧的关键因素,镀铜钢焊丝与导电嘴之间的接触电阻值约为1.6 mΩ,而对于无镀铜钢焊,该值提高到约2.5 mΩ。导电嘴使用寿命随接触电阻、焊接电流、送丝速度增大而缩短;法向接触载荷一方面增大机械磨损,另一方面减少电气磨损,因此对导电嘴寿命有着复杂影响。高强度、高导电性导电嘴材料有利于延长导电嘴使用寿命,利用双相析出沉淀强化的Cu-Cr-Zr系铜合金能在显著提高材料强度的同时尽可能地减少因合金固溶导致的电导率损失,与此同时,石墨基、粉末冶金及复合材料导电嘴也有一定的实用性和研究价值。光洁平整的焊丝表面有利于延长导电嘴使用寿命,在无镀铜焊丝表面制备润滑性涂层能进一步提升导电嘴磨损性能。由于焊接条件的特殊性,表面涂层需兼具高温稳定性、高导电性等特征,具有表面效应和小尺寸效应的固体润滑剂在这方面具有极大的优势和应用前景。本文综述了熔化极气体保护焊导电嘴载流磨损机理的研究进展,从工艺参数、导电嘴材料、焊丝表面状态等方面分析了影响导电嘴载流磨损的因素和延长导电嘴寿命的可行方法,对减少导电嘴磨损,延长其寿命,推动机器人自动化焊接和无镀铜实心焊丝研发制造具有一定的指导意义。

关键词：熔化极气体保护焊工艺性能导电嘴寿命载流磨损

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

Generation of induced secretome from adipose-derived stem cells specialized for disease-specific treatment:An experimental mouse model

引用

World Journal of Stem Cells 2020年第1期12卷 70-86页

作者： Ok-hee kim Ha-Eun Hong Haeyeon Seo Bong Jun Kwak Ho Joong Choi Kee-Hwan kim Joseph Ahn Sang Chul Lee Say-June kim Catholic Central Laboratory of Surgery Institute of Biomedical IndustryCollege of Medicinethe Catholic University of KoreaSeoul 06591South Korea Department of Surgery Division of Hepato-biliary Pancreatic SurgerySeoul St.Mary’s HospitalCollege of Medicinethe Catholic University of KoreaSeoul 06591South Korea Department of Surgery Uijeongbu St.Mary's HospitalCollege of Medicinethe Catholic University of KoreaSeoul 11765South Korea Department of Surgery Daejeon St.Mary’s HospitalCollege of MedicineThe Catholic University of KoreaSeoul 34943South Korea

BACKGROUND Recently,the exclusive use of mesenchymal stem cell(MSC)-secreted molecules,named as the secretome,have been evaluated for overcoming the limitations of cell-based therapy while maintaining its *** To improve cell-free therapy by adding disease-specificity through stimulation of MSCs using disease-causing *** We collected the secretory materials(named as inducers)released from AML12 hepatocytes that had been pretreated with thioacetamide(TAA)and generated the TAA-induced secretome(TAA-isecretome)after stimulating adipose-derived stem cells with the *** TAA-isecretome was intravenously administered to mice with TAA-induced hepatic failure and those with partial *** TAA-isecretome infusion showed higher therapeutic potential in terms of(1)restoring disorganized hepatic tissue to normal tissue;(2)inhibiting proinflammatory cytokines(interleukin-6 and tumor necrosis factor-α);and(3)reducing abnormally elevated liver enzymes(aspartate aminotransferase and alanine aminotransferase)compared to the naïve secretome infusion in mice with TAA-induced hepatic ***,the TAA-isecretome showed inferior therapeutic potential for restoring hepatic function in partially hepatectomized *** analysis of TAA-isecretome identified that antioxidant processes were the most predominant enriched biological networks of the proteins exclusively identified in the *** addition,peroxiredoxin-1,a potent antioxidant protein,was found to be one of representative components of TAA-isecretome and played a central role in the protection of TAA-induced hepatic *** Appropriate stimulation of adipose-derived stem cells with TAA led to the production of a secretome enriched with proteins,especially peroxiredoxin-1,with higher antioxidant *** results suggest that appropriate stimulation of MSCs with pathogenic agents can lead to the production of a secretome specialized for protecting agains

关键词： Adipose-derived stem cells Disease-specificity Mesenchymal stem cells Secretome Peroxiredoxin-1 Thioacetamide Toxic hepatic failure

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

Long cycle-life aqueous Zn battery enabled by facile carbon nanotube coating on Cu current collector

引用

Carbon Energy 2024年第6期6卷 151-164页

作者： Beom-Keun Cho Sung-Ho Huh So hee kim Seungho Yu Jong-Seong Bae Jung-Keun Yoo Seung-Ho Yu Department of Chemical and Biological Engineering Korea UniversitySeoulRepublic of Korea Advanced Analysis Center Korea Institute of Science and Technology(KIST)SeoulRepublic of Korea Energy Storage Research Center Korea Institute of Science and Technology(KIST)SeoulRepublic of Korea KIST School Division of Energy and Environment TechnologyKorea University of Science and TechnologySeoulRepublic of Korea Busan Center Korea Basic Science Institute(KBSI)BusanRepublic of Korea Carbon Composites Department Composites Research DivisionKorea Institute of Materials Science(KIMS)ChangwonRepublic of Korea

As an alternative to Li-ion batteries,aqueous Zn batteries have gained attention due to the abundance of Zn metal,low reduction potential(-0.76 V *** hydrogen electrode),and high theoretical capacity(820 mAh g^(-1))of multivalent Zn2+***,the growth of Zn dendrites and the formation of irreversible surface reaction byproducts pose challenges for ensuring a long battery lifespan and ***,the Cu foil coated with a single-walled carbon nanotube(SWCNT)layer using a facile doctor blade casting method is *** SWCNT-coated Cu foil demonstrates a significantly longer battery lifespan compared to the bare Cu in the half-cell *** operando optical microscopy imaging,we are able to provide intuitive evidence that Zn deposition occurs between the carbon nanotube(CNT)coating and Cu substrate,in agreement with the computational ***,with various imaging techniques,the flat morphology and homogeneous distribution of Zn beneath the SWCNT layer are *** addition,the full-cell using CNT-coated Cu exhibits a long cycle life compared to the control group,thereby demonstrating improved electrochemical performance with limited Zn for the cycling process.

关键词： aqueous Zn battery carbon nanotube operando imaging surface coating

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

Animal plant warfare and secondary metabolite evolution

引用

Natural Products and Bioprospecting 2013年第1期3卷 1-7页

作者： Steffen WÖLL Sun hee kim Henry Johannes GRETEN Thomas EFFERTH Department of Pharmaceutical Biology Institute of Pharmacy and BiochemistryJohannes Gutenberg-UniversityMainzGermany Institute of Biomedical Sciences(ICBAS) University of PortoPortugal

The enduring discussion,why plants produce secondary metabolites with pharmacologically and toxicologically active towards mammals traces back to the eminent role of medicinal plants in the millennia-old history of *** recent years,the concept of an animal plant warfare emerged,which focused on the co-evolution between plants and *** a reaction to herbivory,plants developed mechanical defenses such as thorns and hard shells,which paved the way for adapted animal *** evolved further defense systems by producing chemicals that exert toxic effects on the animals that ingest *** a result of this selective pressure,animals developed special enzymes,*** P450 monooxigenases(CYP450)that metabolize xenobiotic *** a next step in the evolutionary competition between plants and animals,plants evolved to produce non-toxic pro-drugs,which become toxic only after ingestion by animals through metabolization by enzymes such as *** these sequestered evolutionary developments call to mind an arms race,the term animal plant warfare has been *** evolutionary competition between plants and animals may help to better understand the modes of action of medicinal plants and to foster the efficient and safe use of phytotherapy nowadays.

关键词： natural products phytochemicals liver metabolism cytochrome P450 monooxigenase ABC-transporter herbivore

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

Chronic activation of 4-1BB signaling induces granuloma development in tumor-draining lymph nodes that is detrimental to subsequent CD8^(+)T cell responses

引用

Cellular & Molecular Immunology 2021年第8期18卷 1956-1968页

作者： Seon-hee kim Rohit Singh Chungyong Han Eunjung Cho Yu I.kim Don G.Lee Young H.kim Sang Soo kim Dong Hoon Shin Hye Jin You Hyeon-Woo Lee Byoung S.Kwon Beom K.Choi Division of Tumor Immunology National Cancer CenterGoyang10408Republic of Korea Graduate School of Cancer Science and Policy National Cancer CenterGoyang10408Republic of Korea Biomedicine Production Branch Program for Immunotherapy ResearchGoyang10408Republic of Korea Eutilex Institute for Biomedical Research EutilexCo.Ltd.Seoul08594Republic of Korea Division of Convergence Technology National Cancer CenterGoyang10408Republic of Korea Division of Translational Science National Cancer CenterGoyang10408Republic of Korea Institute of Oral Biology School of DentistryGraduate SchoolKyung Hee UniversitySeoul02447Republic of Korea Department of Medicine Tulane University Health Sciences CenterNew OrleansLA70112USA

The antitumor capabilities of agonistic anti-4-1BB mAbs have made them an attractive target for tumor ***,the adverse side effects associated with agonist antibodies have hindered their clinical ***,we aimed to study the immune-related adverse events of repeated doses and long-term use of agonistic anti-4-1BB *** show that chronic activation of 4-1BB signals induced the accumulation of IFN-γ-producing PD-1^(+)CD8^(+)T cells in the secondary lymphoid organs of tumor-bearing mice by increasing the number of dividing CD8^(+)T cells,which was beneficial for suppressing tumor growth in the early phase of anti-4-1BB ***,repeated exposure to anti-4-1BB mAbs led to granuloma development in tumor-draining lymph nodes(TDLNs)of mice due to recruitment and accumulation of macrophages via the CD8^(+)T cell-IFN-γ*** was accompanied by excessive lymph node swelling,which impaired the sequential activation of CD8^(+)T *** data provide insights into the immune-related adverse events of long-term agonist 4-1BB antibody dosing,which should be considered during the clinical development of immunomodulating therapy.

关键词： 4-1BB Costimulation Granuloma CD8 lymphocyte Macrophage

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

Visible light induced catalytic properties of CdSe-graphene nanocomposites and study of its bactericidal effect

引用

Chinese Chemical Letters 2014年第6期25卷 941-946页

作者： Kefayat Ullah Young-hee kim Byung-Eui Lee Sun-Bok Jo Lei Zhu Shu Ye Won-Chun Oh Department of Advanced Materials Science﹠Engineering Hanseo University Department of Immunology College of MedicineSoonchunhyang UniversityCheonan 330-721Republic of Korea Department of Chemistry Soonchunhyang UniversityAsanChungnam 336-745Republic of Korea

A novel composite, CdSe-graphene, was synthesized using facile hydrothermal method. The structural characteristics studies of the synthesized composites were investigated by X-ray diffraction （XRD）, scanning electron microscope （SEM）, transmission electron microscope （TEM）, Brunauer, Emmett, Teller specific surface area （BET） and X-ray photoelectron spectroscopy （XPS）. The photocatalytic activity was investigated by the degradation of methylene blue as standard dye. The degradation of M8 was calculated based on the decrease in concentration of the dye with respect to regular time intervals. The reusability tests were done to investigate the stability of the used catalysts. Additionally the antibacterial activity of CdSe-graphene was also investigated using bacterium Streptococcus aureus （S. aureus）.

关键词： Semiconductors Hydrothermal method Antimicrobial Photocatalysis

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

Measuring the Effectiveness of Safety Incentives in Construction Sites in Korea

引用

Journal of Building Construction and Planning Research 2018年第4期6卷 267-277页

作者： Gwang-hee kim Department of Architectural Engineering Kyonggi University Suwon South Korea

The purpose of this study is to investigate the effect of motivation factors that actively induce construction workers participate in safety prevention activities and to investigate the effect of incentive program as motivation factor by conducting questionnaire survey. The survey was conducted for construction workers from September, 2017 to October, 2018, and the number of respondents was 256. The results of this study are that the factor of the greatest role in encouraging workers to voluntarily participate in accident prevention activities is management factors and that the introduction of new management methods such as safety incentives to reduce safety accidents is necessary. These results indicate that the accident prevention facilities and safety education and training have their limitations. Therefore, it is necessary to thoroughly reconsider what has already been done, and to find more innovative methods to reduce construction accidents.

关键词： Accident Prevention Activities Motivation Factors Safety Incentives

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

A Study on the Characteristics for the Ground Vibration Due to the Travelling Tilting Train

引用

Engineering（科研） 2013年第9期5卷 729-734页

作者： hee Seok kim Structural Engineering Research Division Korea Institute of Construction Technology Republic of Korea

The development of the tilting train can contribute to solve the economic burden and enhance the transportation means of areas that did not share the benefits of the high speed railway. But the dynamic behavior caused by the interaction between the train and the track as well as the environmental vibrations along the railway should be evaluated to secure the safety of the train and riding comfort. In this paper a study on the characteristics for ground vibration due to the tilting train travelling in the conventional line are carried out. The transmitted load into the ground is computed through a study on the interrelation between the tilting car and the line. This load is applied into the numerical model which is one for the analysis of ground vibration due to the travelling tilting car. The far fields on the numerical model are formed by the absorbing boundary using dashpot, one of the most widely used absorbing boundary in finite element analysis. Using this numerical model, the analysis of the ground vibration characteristics caused by travelling tilting car is performed. From the analysis, it is shown that the transferred load due to the tilting train is larger than that of the conventional train.

关键词： Ground Vibration Tilting Car Absorbing Boundary

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

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：