检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

高自旋多环芳烃的研究进展

广州化工 2024年第6期52卷 1-5页

作者：叶星根唐子龙房小靖曾望东湖南科技大学理论有机化学与功能分子教育部重点实验室湖南湘潭411100 湖南科技大学化学化工学院湖南湘潭411201 湖南科技大学材料科学与工程学院湖南湘潭411201

近年来,开壳多环芳烃由于其独特的光学、电学和磁学性质,受到了科学家们广泛的关注,尤其以碳材料为中心的开壳多环芳烃材料有了广泛的报道和研究。高自旋多环芳烃作为开壳多环芳烃的重要组成部分,由于高反应活性而导致其制备与表征极具... 详细信息

近年来,开壳多环芳烃由于其独特的光学、电学和磁学性质,受到了科学家们广泛的关注,尤其以碳材料为中心的开壳多环芳烃材料有了广泛的报道和研究。高自旋多环芳烃作为开壳多环芳烃的重要组成部分,由于高反应活性而导致其制备与表征极具挑战。本文将对具有高自旋基态的非那烯类中性自由基和三角烯及其衍生物的制备与表征进行详细的总结与说明。

关键词：开壳多环芳烃高自旋非那烯自由基 [n]三角烯

Bilayer borophene:an efficient catalyst for hydrogen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2024年第3期18卷 13-23页

作者： Na xing Nan Gao Panbin ye Xiaowei Yang Haifeng Wang Jijun Zhao College of Sciences/Xinjiang Production&Construction Corps Key Laboratory of Advanced Energy Storage Materials and Technologies Shihezi UniversityShihezi832000China Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Ministry of Education)Dalian University of TechnologyDalian116024China School of Materials Science and Engineering Taizhou UniversityTaizhou318000China

The electrocatalytic hydrogen evolution reaction is a crucial technique for green hydrogen ***,finding affordable,stable,and efficient catalyst materials to replace noble metal catalysts remains a significant *** experimental breakthroughs in the synthesis of two-dimensional bilayer borophene provide a theoretical framework for exploring their physical and chemical *** this study,we systematically considered nine types of bilayer borophenes as potential electrocatalysts for the hydrogen evolution *** first-principles calculations revealed that bilayer borophenes exhibit high stability and excellent conductivity,possessing a relatively large specific surface area with abundant active *** surface boron atoms and the bridge sites between two boron atoms can serve as active sites,displaying high activity for the hydrogen evolution ***,the Gibbs free energy change associated with adsorption for these bilayer borophenes can reach as low as−0.002 eV,and the Tafel reaction energy barriers are lower(0.70 eV)than those on ***,the hydrogen evolution reaction activity of these two-dimensional bilayer borophenes can be described by engineering their work ***,we considered the effect of pH on hydrogen evolution reaction activity,with significant activity observed in an acidic *** theoretical results reveal the excellent catalytic performance of two-dimensional bilayer borophenes and provide crucial guidance for the experimental exploration of multilayer boron for various energy applications.

关键词： bilayer borophene hydrogen evolution reaction work function pH effect

HIF-1α signaling: Essential roles in tumorigenesis and implications in targeted therapies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第1期11卷 234-251页

作者： Yan Zhao Cheng xing Yating Deng Can ye Hongling Peng Department of Hematology The Second Xiangya HospitalCentral South UniversityChangshaHunan 410011China Hunan Key Laboratory of Tumor Models and Individualized Medicine The Second Xiangya HospitalCentral South UniversityChangshaHunan 410011China Hunan Engineering Research Center of Cell Immunotherapy for Hematopoietic Malignancies The Second Xiangya HospitalCentral South UniversityChangshaHunan 410011China

The hypoxic microenvironment is an essential characteristic of most malignant ***,hypoxia-inducible factor-1 alpha(HIF-1a)is a key regulatory factor of cellular adaptation to hypoxia,and many critical pathways are correlated with the biological activity of organisms via *** the intra-tumoral hypoxic environment,HIF-1αis highly expressed and contributes to the malignant progression of tumors,which in turn results in a poor prog-nosis in ***,it has been indicated that HiF-1αinvolves in various critical pro-cesses of life events and tumor development via regulating the expression of HiF-1a target genes,such as cell proliferation and apoptosis,angiogenesis,glucose metabolism,immune response,therapeutic resistance,*** from solid tumors,accumulating evidence has re-vealed that HiF-1αis also closely associated with the development and progression of hemato-logical malignancies,such as leukemia,lymphoma,and multiple *** inhibition of HiF-1a can facilitate an increased sensitivity of patients with malignancies to relevant ther-apeutic *** the review,we elaborated on the basic structure and biological functions of HIF-1a and summarized their current role in various *** is expected that they will have future potential fortargeted therapy.

关键词： Angiogenesis Hematological malignancies Hypoxia-inducible factor-1 alpha(HIF-1α) Immune escape Targeted therapy

A Critical Review on Superchilling Preservation Technology in Aquatic Product

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 Integrative Agriculture 2014年第12期13卷 2788-2806页

作者： WU Chun-hua YUAN Chun-hong ye xing-qian HU Ya-qin CHEN Shi-guo LIU Dong-hong Department of Food Science and Nutrition Zhejiang Key Laboratory for Agro-Food Processing Fuli Institute of Food Science Zhejiang University Faculty of Fisheries Kagoshima University

aquatic product, known as one of the good resources for white meat, has been widely accepted by the consumers due to its high protein, low fat, especially low cholesterol. With the fast development of living standards around the world, the consumer demands for high quality, nutrition, safety and freshness of ifshery food are increasing. Thus, high efifcient preservation technologies for aquatic products become particularly important. Superchilling is one of the controlled-temperature preservation technologies for seafood. Aquatic products can be kept in better quality under superchilling conditions. This review introduced the principle and development of superchilling process, mainly focusing on research progresses and technical dififculties of superchilling. The growth mechanism of ice crystals and the feasibility of application of computational lfuid dynamics in analyzing the temperatures variation and ice crystals during superchilling progress were also discussed, which will provide theoretical foundation for its improvement and application.

关键词： aquatic product superchilling freshness growth mechanism of ice crystals computational lfuid dynamics

Current status of genetic transformation technology developed in cucumber(Cucumis sativus L.)

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2015年第3期14卷 469-482页

作者： WANG Shun-li Seong Sub Ku ye xing-guo HE Cong-fen Suk Yoon Kwon Pil Son Choi Key Laboratory of Biology and Genetic Improvement of Horticultural Crops Ministry of Agriculture/Institute of Vegetables and Flowers Chinese Academy of Agricultural Sciences Department of Oriental Pharmaceutical Development Nambu University Institute of Crop Science Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement School of Sciences Beijing Technology and Business University Plant Systems Engineering Research Center

Genetic transformation is an important technique for functional genomics study and genetic improvement of plants. Until now, Agrobacterium-mediated transformation methods using cotyledon as explants has been the major approach for cucumber, and its frequency has been up to 23%. For example, significantly enhancement of the transformation efficiency of this plant species was achieved from the cotyledon explants of the cultivar Poinsett 76 infected by Agrobacterium strains EHA105 with efficient positive selection system in lots of experiments. This review is to summarize some key factors influencing cucumber regeneration and genetic transformation, including target genes, selection systems and the ways of transgene introduction, and then to put forward some strategies for the increasing of cucumber transformation efficiency. In the future, it is high possible for cucumber to be potential bioreactor to produce vaccine and biomaterials for human beings.

关键词： Cucumis sativus L. plant regeneration genetic transformation positive selection system

HYDROXYLATION OF PHENOL BY IRON(Ⅱ)-PHENANTHROLINE(PHEN)/MCM-41 ZEOLITE

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1996年第3期7卷 259-262页

作者： Chi Biao LIU xing Kai ye Yue WU (Changchun Iustitute of Applied Chemistry,Chinese Academy ofsciences, Changchun, 130022,) Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun 130022

MCM-41 zeolite and Iron (Ⅱ) -Phen/MCM-41 zeolite have been preparedand characterized by XRD,IR, NH3-TPD, BET and UV-Vis. The Iron(Ⅱ)-Phen/MCM-41 zeolite+30% H2O2 system is capable for catalyzing hydroxylation of Phe... 详细信息

关键词： MCM-41 ZEOLITE PHENANTHROLINE PHEN HYDROXYLATION OF PHENOL BY IRON

在线全文

学校读者我要写书评

暂无评论

多波段复合型火焰探测器设计

计量与测试技术 2024年第5期51卷 45-48页

作者：张骏尧吴百川邢烨卜雄洙李益明南京理工大学机械工程学院

针对目前火焰探测器存在的抗干扰能力较弱、响应速度慢等问题,设计了一款多波段复合型火焰探测器。该系统由三波段红外和单波段紫外共四波段组成,可同时编写相应的火焰检测算法,与传统的火焰探测器相比,具有更强的抗干扰能力。实验表明... 详细信息

针对目前火焰探测器存在的抗干扰能力较弱、响应速度慢等问题,设计了一款多波段复合型火焰探测器。该系统由三波段红外和单波段紫外共四波段组成,可同时编写相应的火焰检测算法,与传统的火焰探测器相比,具有更强的抗干扰能力。实验表明:该设备在15m内可快速、准确地检测火焰,能有效区分真假火,误报率低,响应时间小于3s,具有较强的实用性。

关键词：火焰探测火焰算法 STM32 红外电传感器紫外光电管

Cross-species transmission and host range genes in poxviruses

在线全文

学校读者我要写书评

暂无评论

Virologica Sinica 2024年第2期39卷 177-193页

作者： Chen-Hui Yang A-Ling Song ye Qiu xing-Yi Ge College of Biology Hunan Provincial Key Laboratory of Medical VirologyHunan UniversityChangsha410012China

The persistent epidemic of human mpox, caused by mpox virus (MPXV), raises concerns about the future spread ofMPXV and other poxviruses. MPXV is a typical zoonotic virus which can infect human and cause smallpox-likesymptoms. MPXV belongs to the Poxviridae family, which has a relatively broad host range from arthropods tovertebrates. Cross-species transmission of poxviruses among different hosts has been frequently reported andresulted in numerous epidemics. Poxviruses have a complex linear double-strand DNA genome that encodeshundreds of proteins. Genes related to the host range of poxvirus are called host range genes (HRGs). This reviewbriefly introduces the taxonomy, phylogeny and hosts of poxviruses, and then comprehensively summarizes thecurrent knowledge about the cross-species transmission of poxviruses. In particular, the HRGs of poxvirus aredescribed and their impacts on viral host range are discussed in depth. We hope that this review will provide acomprehensive perspective about the current progress of researches on cross-species transmission and HRGvariation of poxviruses, serving as a valuable reference for academic studies and disease control in the future.

关键词： Poxvirus Host range gene(HRG) Host spectrum Cross-species transmission

Unified deep learning model for predicting fundus fluorescein angiography image from fundus structure image

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 Innovative Optical Health Sciences 2024年第3期17卷 105-113页

作者： Yiwei Chen Yi He Hong ye Lina xing Xin Zhang Guohua Shi Jiangsu Key Laboratory of Medical Optics Suzhou Institute of Biomedical Engineering and TechnologyChinese Academy of SciencesSuzhou 215163P.R.China School of Biomedical Engineering(Suzhou) Division of Life Sciences and MedicineUniversity of Science and Technology of China Hefei 230026P.R.China Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghai 200031P.R.China

The prediction of fundus fluorescein angiography(FFA)images from fundus structural images is a cutting-edge research topic in ophthalmological image *** comprises estimating FFA from fundus camera imaging,single-phase FFA from scanning laser ophthalmoscopy(SLO),and three-phase FFA also from *** many deep learning models are available,a single model can only perform one or two of these prediction *** accomplish three prediction tasks using a unified method,we propose a unified deep learning model for predicting FFA images from fundus structure images using a supervised generative adversarial *** three prediction tasks are processed as follows:data preparation,network training under FFA supervision,and FFA image prediction from fundus structure images on a test *** comparing the FFA images predicted by our model,pix2pix,and CycleGAN,we demonstrate the remarkable progress achieved by our *** high performance of our model is validated in terms of the peak signal-to-noise ratio,structural similarity index,and mean squared error.

关键词： Fundus fluorescein angiography image fundus structure image image translation unified deep learning model generative adversarial networks