期刊文献+
共找到82篇文章
< 1 2 5 >
每页显示 20 50 100
JST促进亚洲青少年交流、培养科技创新人才的举措
1
作者 冲村宪树 《中国科技教育》 2019年第8期13-15,共3页
中日青少年之间的交流,不仅仅有利于人才的培养,还可以加深彼此之间的了解,促进和平。在这里,我将介绍JST通过"樱花科技计划"在促进亚洲青少年交流、培养科技创新人才方面的举措。日本的科技创新体系很像是中国的科技部和教... 中日青少年之间的交流,不仅仅有利于人才的培养,还可以加深彼此之间的了解,促进和平。在这里,我将介绍JST通过"樱花科技计划"在促进亚洲青少年交流、培养科技创新人才方面的举措。日本的科技创新体系很像是中国的科技部和教育部结合在一起的一个组织。 展开更多
关键词 创新人才 科技计划 青少年 培养 亚洲 科技创新体系 教育部 科技部
在线阅读 下载PDF
Lumbar Spondylolysis in Chinese Adults:Prevalence and Musculoskeletal Conditions
2
作者 Dong Yan Yandong Liu +8 位作者 Ling Wang Kai Li Wenshuang Zhang Yi Yuan Jian Geng Kangkang Ma Fengyun Zhou Zitong Cheng Xiaoguang Cheng 《Biomedical and Environmental Sciences》 2025年第5期598-606,共9页
Objective To determine the prevalence of lumbar spondylolysis(LS)and the proportion of spondylolytic spondylolisthesis(SS)in China,and to evaluate the musculoskeletal status of patients with LS and SS.Methods Spine Co... Objective To determine the prevalence of lumbar spondylolysis(LS)and the proportion of spondylolytic spondylolisthesis(SS)in China,and to evaluate the musculoskeletal status of patients with LS and SS.Methods Spine Computed Tomography(CT)images were collected from community populations aged 40 and above in a nationwide multi-center project.LS was diagnosed,and SS was graded by an experienced radiologist.Bone mineral density(BMD)and paraspinal muscle parameters were quantified based on CT images.Results One hundred and seventeen patients of a total of 3,317 individuals were diagnosed with LS,corresponding to a prevalence rate of 3.53%.63 of the 1,214 males(5.18%)and 54 of the 2,103 females(2.57%)were diagnosed with LS.SS occurred in 64/121 vertebrae(52.89%).BMD was not associated with LS(P=0.341).The L5 extensor paraspinal muscle density was higher in the LS group than in the non-LS group.In the LS group,patients with SS had a smaller L5 paraspinal extensor muscle cross-sectional area than those without SS(P=0.003).Conclusion The prevalence of LS in Chinese adults was 3.53%,with prevalence rates of 5.18%in males and 2.57%in females.Patients with LS have higher muscle density,whereas those with SS have smaller muscle cross-sectional areas at the L5 level. 展开更多
关键词 Lumbar spondylolysis Spondylolytic spondylolisthesis CHINESE PREVALENCE Musculoskeletal quantitative analysis
暂未订购
A Spectrum Allocation and Security-Sensitive Task Offloading Algorithm in MEC Using DVS
3
作者 Xianwei Li Bo Wei +3 位作者 Xiaoying Yang Amr Tolba Zijian Zeng Osama Alfarraj 《Computers, Materials & Continua》 2025年第11期3437-3455,共19页
With the advancements of the next-generation communication networking and Internet ofThings(IoT)technologies,a variety of computation-intensive applications(e.g.,autonomous driving and face recognition)have emerged.Th... With the advancements of the next-generation communication networking and Internet ofThings(IoT)technologies,a variety of computation-intensive applications(e.g.,autonomous driving and face recognition)have emerged.The execution of these IoT applications demands a lot of computing resources.Nevertheless,terminal devices(TDs)usually do not have sufficient computing resources to process these applications.Offloading IoT applications to be processed by mobile edge computing(MEC)servers with more computing resources provides a promising way to address this issue.While a significant number of works have studied task offloading,only a few of them have considered the security issue.This study investigates the problem of spectrum allocation and security-sensitive task offloading in an MEC system.Dynamic voltage scaling(DVS)technology is applied by TDs to reduce energy consumption and computing time.To guarantee data security during task offloading,we use AES cryptographic technique.The studied problem is formulated as an optimization problem and solved by our proposed efficient offloading scheme.The simulation results show that the proposed scheme can reduce system cost while guaranteeing data security. 展开更多
关键词 IoT DVS MEC AES
在线阅读 下载PDF
Nanofluidic Manipulation of Single Nanometric Objects:Current Progress,Challenges,and Future Opportunities
4
作者 Nattapong Chantipmanee Yan Xu 《Engineering》 CSCD 2024年第12期54-71,共18页
The manipulation of nanometric objects,encompassing both non-biological and biological objects,offers a transformative avenue for breakthroughs in diverse fields,such as chemistry,biology,chemical and biomedical engin... The manipulation of nanometric objects,encompassing both non-biological and biological objects,offers a transformative avenue for breakthroughs in diverse fields,such as chemistry,biology,chemical and biomedical engineering,materials and mechanical engineering,and various industrial applications.However,achieving accuracy,precision,and high throughput in the manipulation of nanometric objects,whether on the scale of a single nanometric entity or molecule,is a formidable challenge because of the extremely small dimensions involved.Nanofluidics has already demonstrated unique capabilities for transporting the mass of ions and small molecules at the nanoscale.We posit that chip-based nanofluidic devices provide potent strategies for the precise,accurate,and high-throughput manipulation of single nanometric entities and molecules,benefiting from their dimensions,which are comparable to those of nanometric objects.This article offers an overview of the current progress in nanofluidic manipulation of single nanometric objects.It also discusses the challenges in the development of nanofluidic manipulation technologies.Furthermore,the article explores future opportunities in the field,highlighting possible solutions to the challenges,and aims to contribute to the ongoing discourse on nanofluidic manipulation,thus propelling the field to overcome its current limitations. 展开更多
关键词 NANOCHANNELS MICROFLUIDICS Single entities Nanoparticles DNA PROTEINS Vesicles Viruses
在线阅读 下载PDF
Strategy for pattern recognition-driven optical chemosensing based on polythiophene
5
作者 Binduja Mohan Yui Sasaki Tsuyoshi Minam 《Smart Molecules》 2024年第3期1-13,共13页
Polythiophenes(PTs)with flexible backbones possess inherent polymer behaviors,including molecular wire effects and dynamic structural changes inπ-conjugated systems.The chemical sensing at the functionalized side cha... Polythiophenes(PTs)with flexible backbones possess inherent polymer behaviors,including molecular wire effects and dynamic structural changes inπ-conjugated systems.The chemical sensing at the functionalized side chains can manipulate such polymer characteristics,resulting in various optical patterns depending on the analyte structures and their concentrations.The unique optical patterns derived from polymer properties contribute to group categorization over a wide concentration range for pattern recognition.This review aims to provide a concise overview of the potential of PT chemosensor arrays using actual sensing examples in environmental monitoring,medical diagnostics,and food analysis.Furthermore,this review summarizes the methodologies that use polymer gels to realize practical chemosensor array chips for onsite analysis. 展开更多
关键词 chemosensor array pattern recognition POLYMERS POLYTHIOPHENE SENSORS
在线阅读 下载PDF
强光致磷酸盐激光玻璃的色心及其ESR研究 被引量:1
6
作者 姜雄伟 邱建荣 +1 位作者 朱从善 KazuyukiHirao 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2003年第1期34-38,共5页
研究了磷酸盐激光玻璃在120fs,800nm,1kHz脉冲激光照射下的光致暗化现象并测出了它们的光致暗化阈值.由ESR分析得出,磷酸盐玻璃的光致暗化来源于飞秒激光照射处玻璃因激光照射时的多光子吸收而产生的色心.分析了Nd3+对磷酸盐玻璃的光致... 研究了磷酸盐激光玻璃在120fs,800nm,1kHz脉冲激光照射下的光致暗化现象并测出了它们的光致暗化阈值.由ESR分析得出,磷酸盐玻璃的光致暗化来源于飞秒激光照射处玻璃因激光照射时的多光子吸收而产生的色心.分析了Nd3+对磷酸盐玻璃的光致暗化的影响并讨论了色心的类型. 展开更多
关键词 激光玻璃 光致色心 磷酸盐玻璃 ESR 飞秒激光 光致暗化
在线阅读 下载PDF
锆诱导的五元环化合物的新合成 被引量:1
7
作者 席婵娟 TAKAHASHI Tamotsu 《化学学报》 SCIE CAS CSCD 北大核心 2001年第12期2035-2041,共7页
由锆杂五元环化合物出发合成五元环有机化合物,只要求一个碳单元并且形成两个碳-碳键.从以下四个方面描述了利用锆杂环化物合成五元环有机化合物的新合成方法:(1)CO或RNC的插入反应;(2)与丙炔酸酯的加成反应--两次的Michael加成;(3)与... 由锆杂五元环化合物出发合成五元环有机化合物,只要求一个碳单元并且形成两个碳-碳键.从以下四个方面描述了利用锆杂环化物合成五元环有机化合物的新合成方法:(1)CO或RNC的插入反应;(2)与丙炔酸酯的加成反应--两次的Michael加成;(3)与碘代丙烯酸酯或碘代环烯酮的偶联加成反应--先偶联后Michael加成;(4)与酰氯的取代加成反应--先亲核取代后亲核加成.每类反应都含有数个简单反应类型. 展开更多
关键词 锆杂环化物 五元环有机化合物 反应机理 合成 一氧化碳 PNC 插入反应 丙炔酸酯 加成反应 酰氯 碘代丙烯酸酯
在线阅读 下载PDF
MoCl5参与的芳香化合物的C-H活化及原位C-C键偶联反应
8
作者 郭巧霞 申宝剑 高桥保 《应用化学》 CAS CSCD 北大核心 2008年第9期1073-1077,共5页
研究了MoC l5参与的芳香族化合物C—H键活化及原位C—C键偶联反应,方法不用预先制备芳卤和芳香族金属化合物,用取代苯原位高选择性地合成了一系列4,4′-偶联产物(如:4,4′-二甲氧基联苯,4,4′-二苯氧基联苯,3,3′-二甲基-4,4′-二甲氧... 研究了MoC l5参与的芳香族化合物C—H键活化及原位C—C键偶联反应,方法不用预先制备芳卤和芳香族金属化合物,用取代苯原位高选择性地合成了一系列4,4′-偶联产物(如:4,4′-二甲氧基联苯,4,4′-二苯氧基联苯,3,3′-二甲基-4,4′-二甲氧基联苯,2,3,2,′3′-四氢-5,5′-二苯并呋喃,3,3′-二氢-2,2′-二甲基-5,5′-二苯并呋喃等),并对产物的结构采用核磁共振和单晶X射线衍射测试技术进行了表征。 展开更多
关键词 五氯化钼 芳烃C—H键活化 原位偶联反应
在线阅读 下载PDF
人工糖脂—一种在病原生物学研究中的糖链探针(英文)
9
作者 高崎(松本)绫乃 金子雅哉 +5 位作者 宫脇伸次 佐藤玲子 川上宏子 松下操 山口(藤田)陽子 中田宗宏 《中国病原生物学杂志》 CSCD 2008年第7期538-542,共5页
人工糖脂质是由糖和脂质经过人工合成的物质,其疏水性部分很容易固定,鉴于这种特性,人工糖脂质象凝结素一样常被用于糖识别蛋白和糖识别的研究和解析。众所周知,一些病原体能够识别其目的细胞表面的糖链而造成宿主感染,人工糖脂质作为... 人工糖脂质是由糖和脂质经过人工合成的物质,其疏水性部分很容易固定,鉴于这种特性,人工糖脂质象凝结素一样常被用于糖识别蛋白和糖识别的研究和解析。众所周知,一些病原体能够识别其目的细胞表面的糖链而造成宿主感染,人工糖脂质作为一种糖链探针,将对这种感染途径和机制的研究提供有益的帮助。 展开更多
关键词 人工糖脂质 凝集素 糖识别 细菌粘附 感染
暂未订购
机器人的现在与未来 被引量:1
10
作者 Michiharu Nakamura 《科技导报》 CAS CSCD 北大核心 2015年第23期22-23,共2页
我们现在所处的时代,是—个网络中充满战争,同时在实体世界中不断地出现社会创新和进步的时代,特别是机器人行业,横跨了工业、医疗、灾难救助、物流、自动驾驶以及其他各个领域,快速的发展正不断地改变着社会与人类的活动。我们能够看... 我们现在所处的时代,是—个网络中充满战争,同时在实体世界中不断地出现社会创新和进步的时代,特别是机器人行业,横跨了工业、医疗、灾难救助、物流、自动驾驶以及其他各个领域,快速的发展正不断地改变着社会与人类的活动。我们能够看到日本的机器人在Edo时代所发挥的重要作用,他不断地服务于富有人群,并且后来慢慢在大众中变得越来越受欢迎。下面的这个机器人是19世纪发明的(图1),同时Toshiba先生成立了Toshiba制造公司, 展开更多
关键词 TOSHIBA 灾难救助 社会创新 社会与人 控制模型 核泄漏 真空吸尘器 安全测试 东京国立博物馆 语音识别
原文传递
High-temperature formation phases and crystal structure of hot-pressed thermoelectric compounds with chalcopyrite-type structure 被引量:2
11
作者 Atsuko Kosuga Yosuke Fujii Akito Horie 《Rare Metals》 SCIE EI CAS CSCD 2018年第4期360-368,共9页
In this study, we introduced the temperaturedependent formation phases and crystallographic parameters of hot-pressed silver gallium telluride AgGaTe2 and copper gallium telluride CuGaTe2 with chalcopyrite structure f... In this study, we introduced the temperaturedependent formation phases and crystallographic parameters of hot-pressed silver gallium telluride AgGaTe2 and copper gallium telluride CuGaTe2 with chalcopyrite structure from 300 to 800 K. These two compounds are potential thermoelectric materials in the intermediate temperature range; however, the temperature-dependent formation phases and crystallographic parameters of hotpressed samples have not yet been analyzed in detail. The crystal structure analysis based on synchrotron X-ray diffraction (SXRD) measurements clarifies that impurity phases such as Te and Ag2Te in the AgGaTe2 matrix and Te and CuTe in the CuGaTe2 matrix appear at some temperature regions above 300 K. The existence of such impurity phases could be correlated with the increases of the electrical resistivity and Seebeck coefficient of the samples after multiple measurement cycles of the temperature-dependent transport properties from 300 to 800 K. The tetragonal lattice parameters a and c, tetragonal lattice volume, thermal expansion coefficients, tetragonal distortion, anion displacement parameter, and isotropic displacement parameter of the hot-pressed AgGaTe2 and CuGaTe2 were also analyzed. These crystallographic parameters are expected to substantially affect the thermoelectric properties of AgGaTe2 and CuGaTe2. Our results provide prospect of the long-term high-temperature stability and clues of the detailed analysis on the transport properties of hot-pressed AgGaTe2 and CuGaTe2, which should aid their development for thermoelectric applications. 展开更多
关键词 CHALCOPYRITE Silver gallium telluride Coppergallium telluride THERMOELECTRIC Crystal structure
原文传递
LNG超低温设备密封件的结构及试验方法 被引量:6
12
作者 曾军林 李厚宁 +2 位作者 黄广明 朱留存 邱质彬 《液压气动与密封》 2017年第2期56-59,共4页
通过对超低温密封产品结构的设计和密封材料进行改性,研究出一种可靠的密封件,通过液氮深冷到-196°C,用氦气作为密封介质,按照英国低温阀门标准BS 6364 1984中的实验步骤来验证密封结构的合理性,并进行优化。经优化验证,密封结构... 通过对超低温密封产品结构的设计和密封材料进行改性,研究出一种可靠的密封件,通过液氮深冷到-196°C,用氦气作为密封介质,按照英国低温阀门标准BS 6364 1984中的实验步骤来验证密封结构的合理性,并进行优化。经优化验证,密封结构设计合理,材料物理性能优越,可以推广应用到LNG超低温设备中,弥补了国内在超低温设备密封上的难点。 展开更多
关键词 超低温 U型密封环 工字槽 改性PTFE 液化介质
在线阅读 下载PDF
Important roles of graphene edges in carbon-based energy storage devices 被引量:2
13
作者 Yoong Ahm Kim Takuya Hayashi +1 位作者 Jin Hee Kim Morinobu Endo 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第2期183-194,共12页
Nanostructured carbon materials, including carbon nanotubes, graphene and nanoporous carbon, show promise for expanding renewable energy. In particular, the configuration and electronic properties of graphene edges in... Nanostructured carbon materials, including carbon nanotubes, graphene and nanoporous carbon, show promise for expanding renewable energy. In particular, the configuration and electronic properties of graphene edges in relation with their electrochemical activity have become a major issue in carbon-based energy storage devices. Here, we review recent results concerning the important roles of graphene edges as the gateway for lithium ion intercalation in the anode of lithium-ion batteries, as promoters of high capacitance in carbon-based supercapacitors, and as anchoring sites for Pt nanoparticles in fuel cells. We envisage that the controlled synthesis of a specific, clean, and stable edge configuration could be achieved to maximize the electrochemical performance of nanostructured carbon-based energy storage devices. 展开更多
关键词 carbon nanotube GRAPHENE edge lithium ion battery SUPERCAPACITOR fuel cell
在线阅读 下载PDF
Modeling Real Objects for Kansei-based Shape Retrieval 被引量:2
14
作者 Yukihiro Koda Ichi Kanaya Kosuke Sato 《International Journal of Automation and computing》 EI 2007年第1期14-17,共4页
A large number of 3D models are created on computers and available for networks. Some content-based retrieval technologies are indispensable to find out particular data from such anonymous datasets. Though several sha... A large number of 3D models are created on computers and available for networks. Some content-based retrieval technologies are indispensable to find out particular data from such anonymous datasets. Though several shape retrieval technologies have been developed, little attention has been given to the points on human's sense and impression (as known as Kansei) in the conventional techniques, In this paper, the authors propose a novel method of shape retrieval based on shape impression of human's Kansei. The key to the method is the Gaussian curvature distribution from 3D models as features for shape retrieval. Then it classifies the 3D models by extracted feature and measures similarity among models in storage. 展开更多
关键词 Shape retrieval Kansei engineering modeling of real object.
在线阅读 下载PDF
DHEA-neuroprotection and -neurotoxicity after transient cerebral ischemia in rats 被引量:4
15
作者 Li, Z. Cui, S. Z. +4 位作者 Zhang, Z. Zhou, R. Ge, Y. B. Sokabe, M. Chen, L. 《南京医科大学学报(自然科学版)》 CAS CSCD 北大核心 2009年第4期511-511,共1页
关键词 DHEA 肿瘤 临床 研究
原文传递
BDNF pro-peptide:a novel synaptic modulator generated as an N-terminal fragment from the BDNF precursor by proteolytic processing 被引量:3
16
作者 Toshiyuki Mizui Koji Ohira Masami Kojima 《Neural Regeneration Research》 SCIE CAS CSCD 2017年第7期1024-1027,共4页
Most growth factors are initially synthesized as precursors and it was cleaved into bioactive mature domain and pro-domain.However,compared with the expression and function of bioactive mature domain,the biological ro... Most growth factors are initially synthesized as precursors and it was cleaved into bioactive mature domain and pro-domain.However,compared with the expression and function of bioactive mature domain,the biological role of the pro-domain is poorly understood.Unexpectedly,we found that the pro-domain(or pro-peptide)of brain-derived neurotrophic factor(BDNF),which is well-known neurotrophic factor in brain,has a potential ability to facilitate hippocampal long-term depression.Furthermore,a BDNF polymorphism Val66Met,which substitute valine into methionine at 66 amino acid,impacted the biological activity of the BDNF pro-peptide.We lastly discuss the possible roles of BDNF and its pro-peptide in the generation of neural stem cells and progress of ischemia. 展开更多
关键词 BDNF growth factor neural stem cells ISCHEMIA peptide
暂未订购
GROWTH AND MORPHOLOGY OF POLYMER-ACTIN COMPLEXES 被引量:1
17
作者 Hyuck Joon Kwon Kazuhiro Shikinaka +3 位作者 Akira Kakugo Hidemitsu Furukawa Yoshihito Osada 龚剑萍 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2007年第1期47-55,共9页
F-actins are semi-flexible polyelectrolytes and can be assembled into large polymer-actin complex with polymorphism through electrostatic interaction with polycations. This study investigates the structural phase beha... F-actins are semi-flexible polyelectrolytes and can be assembled into large polymer-actin complex with polymorphism through electrostatic interaction with polycations. This study investigates the structural phase behavior and the growth of polymer-actin complexes in terms of its longitudinal and lateral sizes. Our results show that formation of polymer-actin complexes is cooperative, and morphology and growth of polymer-actin complexes depend on polycation species and concentrations of polycation and salt in a constant actin concentration. We found that the longitudinal growth and lateral growth of polymer-actin complexes are dominated by different factors. This induces the structural polymorphism of polymer-actin complexes. Major factors to influence the polymorphism of polymer-actin complexes in polyelectrolytc system have been discussed. Our results indicate that the semi-flexible polyelectrolyte nature of F-actins is important for controlling the morphology and growth ofactin architectures in cell. 展开更多
关键词 F-ACTIN Polymer-actin complex Polycation concentration (Cp) KCl concentration (Cs) Fluorescence microscopy Transmission electron microscopy (TEM) Rod-like polyelectrolyte.
在线阅读 下载PDF
Fluorescence imaging of drug target proteins using chemical probes 被引量:1
18
作者 Hao Zhu Itaru Hamachi 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2020年第5期426-433,共8页
Fluorescence imaging can provide valuable information on the expression,distribution,and activity of drug target proteins.Chemical probes are useful small-molecule tools for fluorescence imaging with high structural f... Fluorescence imaging can provide valuable information on the expression,distribution,and activity of drug target proteins.Chemical probes are useful small-molecule tools for fluorescence imaging with high structural flexibility and biocompatibility.In this review,we briefly introduce two classes of fluorescent probes for the visualization of drug target proteins.Enzymatically activatable probes make use of the specific enzymatic transformations that generally produce a fluorogenic response upon reacting with target enzymes.Alternatively,specific imaging can be conferred with a ligand that drives the probes to target proteins,where the labeling relies on noncovalent binding,covalent inhibition,or traceless labeling by ligand-directed chemistry. 展开更多
关键词 Fluorescence imaging Drug target Chemical probe Ligand-directed chemistry
暂未订购
利用激光实时频谱直接观测分子结构变化(英文) 被引量:1
19
作者 TAKAYOSHI KOBAYASHI 《光学精密工程》 EI CAS CSCD 北大核心 2011年第2期200-212,共13页
利用脉宽小于5 fs的激光脉冲超快光谱同时研究了RuⅡ(TPP)(CO)的电子弛豫和振动动力学。研究认为,由1Qx(1,0)(π,π*)and1Qx(0,0)(π,π*)产生的信号按1Qx(1,0)(π,π*)→1Qx(0,0)(π,π*)→3(d,π*)→3(π,π*)和1Qx(0,0)(π,π*)→3(d... 利用脉宽小于5 fs的激光脉冲超快光谱同时研究了RuⅡ(TPP)(CO)的电子弛豫和振动动力学。研究认为,由1Qx(1,0)(π,π*)and1Qx(0,0)(π,π*)产生的信号按1Qx(1,0)(π,π*)→1Qx(0,0)(π,π*)→3(d,π*)→3(π,π*)和1Qx(0,0)(π,π*)→3(d,π*)→3(π,π*)的顺序从高能态衰减到低能态1。Qx(1,0)(π,π*),1Qx(0,0)(π,π*),3(d,π*),和3(π,π*)的电子寿命依次为(230±70)fs,(1 150±260)fs,(2 150±360)fs和极大于4.8 ps3。(d,π*)和3(π,π*)的寿命估计为(2150±360)fs和极大于4.8 ps。计算动态Stokes-shift过程中的能量衰减率,得到了从1Qx(1,0)(π,π*)到1Qx(0,0)(π,π*)的渡越时间为(190±40)fs,表明1Qx(1,0)(π,π*)的寿命与该渡越时间有相对较好的一致性。对频谱图的分析表明,依赖时间变化的振动光谱与自旋态变化有关,自旋态可以通过曲线交叉点或者单态和三重态之间的势能面的圆锥交面从激发单重态中的Franck-Condon态变化到三重态。研究发现,不能简单地使用单重态信号频谱的指数衰减形式和三重态振动信号频谱的指数增长形式来表示这种动态变化。相反,振动频谱的变化伴随着复杂的动态变化。首先,单重态振动频谱发生衰减,然后产生不同于单重态和三重态的新的振动频谱。新的振动频谱增长和衰减后,三重态的振动频谱开始增长。这种动态变化似乎与电子频谱的动态变化不同,将这种明显差异的原因解释为:振动频谱的变化可以敏感地检测处于平衡点和过渡状态或者接近锥形交集状态中的单重态和三重态的结构差异。 展开更多
关键词 振动光谱 超快光谱学 激光光谱法 分子结构 自旋 动力学
在线阅读 下载PDF
NAT2*6A, a haplotype of the N-acetyltransferase 2 gene, is an important biomarker for risk of anti-tuberculosis drug-induced hepatotoxicity in Japanese patients with tuberculosis 被引量:21
20
作者 Norihide Higuchi Naoko Tahara +14 位作者 Katsunori Yanagihara Kiyoyasu Fukushima Naofumi Suyama Yuichi Inoue Yoshitsugu Miyazaki Tsutomu Kobayashi Koh-ichiro Yoshiura Norio Niikawa, Chun-Yang Wen, Hajime Isomoto,Saburou Shikuwa, Katsuhisa Omagari, Yohei Mizuta, Shigeru Kohno, Kazuhiro Tsukamoto Norio Niikawa Chun-Yang Wen Hajime Isomoto Saburou Shikuwa Katsuhisa Omagari Yohei Mizuta Shigeru Kohno Kazuhiro Tsukamoto 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第45期6003-6008,共6页
AIM: To investigate an association between N -acetyltransferase 2 (NAT2 )-haplotypes/diplotypes and adverse effects in Japanese pulmonary tuberculosis patients. METHODS: We studied 100 patients with pulmonary TB treat... AIM: To investigate an association between N -acetyltransferase 2 (NAT2 )-haplotypes/diplotypes and adverse effects in Japanese pulmonary tuberculosis patients. METHODS: We studied 100 patients with pulmonary TB treated with anti-TB drugs including INH. The frequencies and distributions of single nucleotide polymorphisms, haplotypes, and diplotypes of NAT2 were determined by the PCR-restriction fragment length polymorphism method, and the results were compared between TB patients with and without adverse effect, using multivariate logistic regression analysis.RESULTS: Statistical analysis revealed that the frequency of a variant haplotype, NAT2*6A , was signifi cantly increased in TB patients with hepatotoxicity, compared with those without hepatotoxicity [P = 0.001, odds ratio (OR) = 3.535]. By contrast, the frequency of a wild-type (major) haplotype, "NAT2*4", was signif icantly lower in TB patients with hepatotoxicity than those without hepatotoxicity (P < 0.001, OR = 0.265). There was no association between NAT2-haplotypes and skin rash or eosinophilia. CONCLUSION: The present study shows that NAT2 is one of the determinants of anti-TB drug-induced hepatotoxicity. Moreover, the haplotypes, NAT2*4 and NAT2*6A, are useful new biomarkers for predicting anti- TB drug-induced hepatotoxicity. 展开更多
关键词 TUBERCULOSIS Anti-tuberculosis drugs Drug-induced hepatotoxicity NAT2-haplotype DNA-baseddiagnosis
暂未订购
上一页 1 2 5 下一页 到第
使用帮助 返回顶部