检索结果-南通市图书馆

Science China Chemistry 2020年第3期63卷 308-324页

作者： ahm Mohsinul Reza Javad Tavakoli Yabin Zhou Jianguang Qin Youhong Tang College of Science and Engineering Flinders UniversityAdelaideSA 5001Australia Institute for NanoScale Science and Technology College of Science and EngineeringFlinders UniversityAdelaideSA 5001Australia

Lipid bodies are dynamic organelles of photosynthetic microalgae that can be used as the third generation resources for biofuel *** of lipids can be influenced by different signalling *** of these processes can provide useful information about the fate and associated roles of lipid molecules in different biological *** photosynthetic organisms,however,studies of calcium ediated lipid biosynthesis is bottlenecked due to the limitation of proper and efficient technologies,which also include visualisation ***,most studies to visualise lipid droplets in vivo have used traditional dyes,and proper visualisation of lipid drops is hindered by dye-specific *** hurdle could be overcome by using recently developed aggregation-induced emission *** review reveals current knowledge gaps in the studies of lipid drops and calcium ions in microalgae,as calcium signaling is important secondary messenger to detect a wide variety of environmental stimuli in plant and animal *** obtain insight into the mechanisms of these processes,the merits and demerits of currently available visualisation techniques for lipid drops and calcium are also ***,opportunities and possibilities are proposed to recommend further improvement of techniques for detecting the role of calcium during lipid formation in microalgae for biofuel production.

关键词： aggregation-induced emission calcium lipid droplets microalgae traditional fluorophores

Resilience of coastal bridges under extreme wave-induced loads

在线全文

学校读者我要写书评

暂无评论

Resilient Cities and Structures 2024年第2期3卷 85-100页

作者： Jesika Rahman Vahid Aghaeidoost ahm Muntasir Billah Department of Civil Engineering University of CalgaryCalgaryAB T2N 1N4Canada

Records of wave-induced damage on coastal bridges during natural hazards have been well documented over the past two *** is of utmost importance to decipher the loading mechanism and enhance the resilience of coastal bridges during extreme wave-inducing *** of vulnerability of these structures is an essential step in designing a resilient bridge ***,considerable efforts have been made to study the force applied and the response of coastal bridge systems during extreme wave loading *** remarkable progress can be found in the quantification of load and response of coastal superstructures,very few studies assessed coastal bridge resiliency against extreme wave-induced *** paper adopts a simplified and practical technique to analyze and assess the resilience of coastal bridges exposed to extreme ***-level and system-level fragility analyses form the basis of the resiliency analysis where the recovery functions are adopted based on the damage *** is shown that wave period has the highest contribution to the variation of bridge ***,this study presents the uncertainty quantification in resiliency variation due to changes in wave load *** show that the bridge resiliency becomes more uncertain as the intensity of wave parameters ***,possible restoration strategies based on the desired resilience level and the attitude of decision-makers are also discussed.

关键词： Coastal bridges Resiliency Extreme wave loads Elastomeric bearing Fragility curves Resilience index Recovery function Restoration strategy

Important roles of graphene edges in carbon-based energy storage devices

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

Journal of Energy Chemistry 2013年第2期22卷 183-194页

作者： Yoong ahm Kim Takuya Hayashi Jin Hee Kim Morinobu Endo Faculty of Engineering Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan Research Center for Exotic Nanocarbons (JST) Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan

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.

关键词： carbon nanotube graphene edge lithium ion battery supercapacitor fuel cell

Comparative investigation of the free radical scavenging potential and anticancer property of diospyros blancoi(Ebenaceae)

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2016年第5期6卷 410-417页

作者： Muhammad Ali Khan Mahbubur Rahman Nazmul Sardar Saiful Islam Arman Badrul Islam Jahangir Alam Khandakar Mamunur Rashid Golam Sadik ahm Khurshid Alam Department of Pharmacy Bangabandhu Sheikh Mujibur Rahman Science and Technology University Department of Pharmacy University of Rajshahi Drugs and Toxins Research division Bangladesh Council of Scientific and Industrial Research Product Development and Validation Department Square Pharmaceutical Limited Laboratory of Genetics Graduate School of BiostudiesKyoto University

Objective: To investigate the comparative effects of diospyros blancoi(Ebenaceae)leaves(DBL), root bark(DBRB) and stem bark(DBSB) on free radicals and ***: The polyphenol contents, antioxidant and free radical scavenging properties were determined using standard spectrophotometric methods. Cytotoxicity and anticancer activities were performed on brine shrimp nauplii and Ehrlich ascite carcinoma cells, ***: Among the extracts, DBSB showed the highest total antioxidant capacity and reducing capacity on ferrous ion. Based on 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radical scavenging activities, DBSB showed(95.760 ± 0.343)% and(67.460 ± 2.641)%scavenging with IC50of(3.10 ± 0.17) and(50.00 ± 3.11) mg/m L, respectively. The IC50 values of standard butylated hydroxytoluene and catechin(CA) for 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radicals were(8.50 ± 0.25) and(75.00 ± 0.14) mg/m L,respectively suggesting that DBSB had a significant(P dical scavenging activity than standards. In lipid peroxidation inhibition assay, the inhibitory activity of the extracts and the standard was in the following order: DBSB > DBRB > CA > ***, the phenolic [(139.91 ± 3.924) mg gallic acid equivalent/g] and flavonoid contents[(412.00 ± 16.70) mg catechin equivalent/g)] of DBSB were higher than that of other extracts. In addition, the DBSB showed the moderate cytotoxic and anticancer ***: Our results indicate that diospyros blancoi stem bark had the significant highest antioxidant and free radical scavenging properties as well as moderate anticancer ***, we assume that the anticancer activity of this plant can be, at least in part, attributed to its content in phenolic compounds as well as its significant free radical scavenging properties.

关键词： diospyros blancoi Free radicals Polyphenols Antioxidant Cytotoxicity Anticancer

漂浮绿藻中缘管浒苔(Ulva linza)鉴定方法的探索(英文)

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

华东师范大学学报（自然科学版） 2013年第5期 71-79页

作者：陈斌斌马家海 SHIN Jong-ahm 高嵩上海海洋大学农业部水产种质资源发掘利用重点实验室上海201306 全南大学校水产海洋大学韩国丽水市556-901

以研究漂浮绿藻中的缘管浒苔(Ulva linza)为出发点,根据绿藻的形态学特征,选取漂浮绿藻中具有***重要特征的藻体进行形态学、分子生物学的分类学研究.结果显示,具有***重要特征的漂浮藻体大多为LPP复合体(***-procera-prolifera)类群(1... 详细信息

以研究漂浮绿藻中的缘管浒苔(Ulva linza)为出发点,根据绿藻的形态学特征,选取漂浮绿藻中具有***重要特征的藻体进行形态学、分子生物学的分类学研究.结果显示,具有***重要特征的漂浮藻体大多为LPP复合体(***-procera-prolifera)类群(15个样品),而且采自江苏的DF05、山东的QD03以及浙江的XS01、XS02等4个固着类型的样品也在该分支中.Ulva flexuosa分支中有2个样品(均为采自福建的固着种类),Ulva compressa分枝包含了如东的4个漂浮样品.采自如东内河、射阳沿海池塘的漂浮藻体也均被包含在LPP复合体中.25个样品中只有4个被鉴定为***,与其形态特征研究结果相符合.漂浮绿藻的形态学特征与分子生物学研究结果存在很大差别.这说明单纯地依靠传统分类学特征或分子生物学手段对漂浮绿藻中的缘管浒苔(***)进行分类是不可取的,甚至对漂浮绿藻都不能适用.在同一地点采集到的漂浮绿藻中,大都存在不同形态特征的类型,经过分子生物学分析后被鉴定为不同的种类.根据ITS序列的系统进化树分析结果,绿潮藻中至少存在LPP复合体中的种类以及***.

关键词：绿潮缘管浒苔形态学 ITS 分子生物学

一种经氟化和热处理在双壁碳纳米管上生成缺陷的方法(英文)

在线全文

学校读者我要写书评

暂无评论

催化学报 2014年第6期35卷 864-868页

作者： Hiroyuki Muramatsu Kazunori Fujisawa Yong-Il Ko Kap-Seung Yang Takuya Hayashi Morinobu Endo Cheol-Min Yang Yong Chae Jung Yoong ahm Kim Faculty of Engineering Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan School of Polymer Science and Engineering Chonnam National University 77 Yongbong-ro Buk-gu 500-757 Gwangju Korea Institute of Carbon Science and Technology Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan Institute of Advanced Composite Materials Korea Institute of Science and Technology Chudong-ro 92 Bongdong-eup Wanju-gun Jeonbuk 565-905 Korea

Nanoscale defects in the outer tube to preserve the electrical and optical features of the inner tube can be engineered to exploit the intrinsic properties of double walled carbon nanotubes (DWCNTs) for various promising applications. We demonstrated a selective way to make defects in the outer tube by the fluorination of DWCNTs followed by the thermal detachment of the F atoms at 1000 °C in argon. Fluorinated DWCNTs with different amounts of F atoms were prepared by reacting with fluorine gas at 25, 200, and 400 °C that gave the stoichiometry of CF0.20, CF0.30, and CF0.43, respectively. At the three different temperatures used, we observed preservation of the coaxial morphology in the fluorinated DWCNTs. For the DWCNTs fluorinated at 25 and 200 °C, the strong radial breathing modes (RBMs) of the inner tube and weakened RBMs of the outer tube indicated selective fluorine attachment onto the outer tube. However, the disappearance of the RBMs in the Raman spectrum of the DWCNTs fluorinated at 400 °C showed the introduction of F atoms onto both inner and outer tubes. There was no significant change in the morphology and optical properties when the DWCNTs fluorinated at 25 and 200 °C were thermally treated at 1000 °C in argon. However, in the case of the DWCNTs fluorinated at 400 °C, the recovery of strong RBMs from the inner tube and weakened RBMs from the outer tube indicated the selective introduction of substantial defects on the outer tube while preserving the original tubular shape. The thermal detachment of F atoms from fluorinated DWCNTs is an efficient way to make highly defective outer tubes for preserving the electrical conduction and optical activity of the inner tubes.

关键词：双壁碳纳米管热处理氟化缺陷光学特性 F原子化学计量呼吸模式

Genotypic Analysis Revealed Association of HLA Alleles with Clinical Parameters in Bangladeshi Patients with Rheumatoid Arthritis

在线全文

学校读者我要写书评

暂无评论

American Journal of Molecular Biology 2019年第4期9卷 173-190页

作者： Fauzun Shaona Rubyyat Hassan Sajib Chakraborty Shahanaz Sultana Jobaida Akther ahm Nurun Nabi Laboratory of Population Genetics Department of Biochemistry and Molecular Biology University of Dhaka Dhaka Bangladesh Popular diagnostic Center Dhanmondi Branch Dhaka Bangladesh

This study investigated distribution of HLA alleles (HLADRB1*01, *03, *04, *07, HLA-DQB1*0201, *0301/4) in 34 healthy controls and 57 rheumatoid arthritis (RA) patients in a Bangladeshi population and correlated the genotypic frequencies with clinical parameters. Frequency distribution of HLA-DRB1*04 (34%) and HLA-DRB1*01 (32%) were the highest followed by HLA-DQB1*0301/4 (29%) and HLA-DQB1*0201 (26%) in RA patients while HLA-DRB1*03 (12%) had lowest frequency. Plasma level of anti-CCP and rheumatoid factor antibodies confirmed diagnosis of RA patients that varied significantly between patients and healthy controls. Likewise, plasma levels of C-reactive protein, triglycerides, cholesterol, HDL-cholesterol and activities of AST and ALT exhibited significant variation between the two groups. In contrast, the levels of glucose, total protein, uric acid, LDL-cholesterol and plasma activity of ALP in RA patients had no significant deviations from healthy controls. Relationship between HLA genotype frequency and clinical parameters revealed that the mean levels of anti-CCP and rheumatoid factor antibodies were highest in the patients harboring HLA-DRB1*04 allele. These findings underpin the correlation between HLA genotype with clinical markers of RA which are indicative of disease severity. The positive correlation of these markers with certain HLA genes may be used to identify susceptible individuals who are likely to have RA in Bangladeshi population.

关键词： Rheumatoid Arthritis HLA Allele Bangladeshi Population Gene Polymorphisms Genotypes