检索结果-南通市图书馆

Overexpression of SOS Genes Enhanced Salt Tolerance in Sweetpotato

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 2012年第3期11卷 378-386页

作者： GAO Shang YUAN Li ZHAI Hong LIU Cheng-long HE Shao-zhen LIU Qing-chang Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis and Utilization Ministry of Education/College of Agriculture and BiotechnologyChina

The production of transgenic sweetpotato （*** 18） plants exhibiting enhanced salt tolerance using salt overly sensitive （SOS） genes was achieved through Agrobacterium tumefaciens-mediated *** strain EHA105 harbors a binary vector pCAMBIA3301 with SOS genes （SOS1,SOS2 and SOS3） and bar *** culture was conducted using 0.3 mg L^-1 phosphinothricin （PPT）.A total of 40 plants were produced from the inoculated 170 cell aggregates via somatic *** analysis showed that 37 of the 40 regenerated plants were transgenic *** in vitro assay demonstrated that superoxide dismutase （SOD） and proline were significantly more accumulated and malonaldehyde （MDA） was significantly less accumulated in 21 transgenic plants than in control plants when they were exposed to 86 mmol L^-1 *** tolerance of these 21 plants was further evaluated with Hoagland solution containing 0,51,86,and 120 mmol L^-1 NaCl in the *** results indicated that 6 of them had significantly better growth and rooting ability than the remaining 15 transgenic plants and control *** of SOS genes in the 6 salt-tolerant transgenic plants was demonstrated by RT-PCR *** study provides an alternative approach for improving salt tolerance of sweetpotato.

关键词： Agrobacterium tumefaciens sweetpotato salt tolerance SOS transgenic plant

Synthesis and biological evaluation of novel steroid-linked nitrogen mustards

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第6期20卷 680-683页

作者： Hua Bing Zhang Ji Jun Xue Xiao long Zhao De Gang Liu Ying Li State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 PR China

Two novel steroid-linked nitrogen mustard conjugates la and lb were synthesized by using estrogenic acid 4 coupled with aniline mustard 8 and phenol mustard 13 in an esterification or amidation procedure. Preliminary cytotoxic screening on cancer cell lines in vitro showed that, the steroid-ester linked nitrogen mustard conjugate la exhibited obvious increasing of activities.

关键词： Steroid Nitrogen mustards Synthesis Biological activity

Recent progress of composite solid polymer electrolytes for all-solid-state lithium metal batteries

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第9期32卷 2659-2678页

作者： Qingjiang Yu Kecheng Jiang Cuiling Yu Xianjin Chen Chuanjian Zhang Yi Yao Bin Jiang Huijin long Jiangsu TAFEL New Energy Technology Co. Ltd.Nanjing 211106China School of Physics Harbin Institute of TechnologyHarbin 150001China

In comparison with lithium-ion batteries(LIBs)with liquid electrolytes,all-solid-state lithium batteries(ASSLBs)have been considered as promising systems for future energy storage due to their safety and high energy *** the pivotal component used in ASSLBs,composite solid polymer electrolytes(CSPEs),derived from the incorporation of inorganic fillers into solid polymer electrolytes(SPEs),exhibit higher ionic conductivity,better mechanical strength,and superior thermal/electrochemical stability compared to the single-component SPEs,which can significantly promote the electrochemical performance of ***,the recent advances of CSPEs applied in ASSLBs are *** effects of the category,morphology and concentration of inorganic fillers on the ionic conductivity,mechanical strength,electrochemical window,interfacial stability and possible Li+transfer mechanism of CSPEs will be systematically ***,the challenges and perspectives are proposed for the future development of high-performance CSPEs and ASSLBs.

关键词： Composite solid polymer electrolyte All-solid-state lithium battery Ionic conductivity Li+transport Electrochemical property

Selectively converting CO_(2) to HCOOH on Cu-alloys integrated in hematite-driven artificial photosynthetic cells

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第4期79卷 601-610页

作者： Jiwu Zhao Liang Huang Lan Xue Zhenjie Niu Zizhong Zhang Zhengxin Ding Rusheng Yuan Xu Lu Jinlin long State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350116FujianChina Clean Combustion Research Center(CCRC) Division of Physical Sciences and EngineeringKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

The integration of electrochemical CO_(2)reduction(CO_(2)RR) and photoelectrochemical water oxidation offers a sustainable access to valuable chemicals and fuels. Here, we develop a rapidly annealed hematite photoanode with a photocurrent density of 2.83 mA cm^(-2)at 1.7 VRHEto drive the full-reaction. We also present Cu-alloys electrocatalysis extended from CuInSnS4, which are superior in both activity and selectivity for CO_(2)RR. Specifically, the screened CuInSn achieves a CO_(2)to HCOOH Faradaic efficiency of 93% at a cell voltage of-2.0 V by assembling into artificial photosynthesis cell. The stability test of IT exhibits less than 3% degradation over 24 h. Furthermore, in-situ Raman spectroscopy reveals that both CO_(3)^(-2)and CO_(2)are involved in CO_(2)RR as reactants. The preferential affinity of C for H in the ^(*)HCO_(2)intermediate enables an improved HCOOH-selectivity, highlighting the role of multifunctional Cu in reducing the cell voltage and enhancing the photocurrent density.

关键词： CO_(2)reduction Rapid annealing Fe_(2)O_(3)photoanode CuInSnS_(4) In-situ spectroscopy

Effect of quaternary basicity on reduction behavior of iron-bearing dust pellets

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2023年第7期30卷 1356-1366页

作者： Tao Yang Jing-shu An Xing-wang Li Shuang Liu Xu Gao Lei Ma Jie Lei Hong-ming long School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction&Resources Recycling(Anhui University of Technology) Ministry of EducationMa’anshan 243002AnhuiChina

The treatment of iron-bearing dusts and sludges by the rotary hearth furnace process has the advantage of sufficient utilization of valuable metals and a high impurity removal rate,but the lower strength of the metallized product needs to be *** effects of quaternary basicity R4(w(CaO+MgO)/w(SiO_(2)+Al_(2)O_(3)))on the reduction behavior and physical and chemical properties of metallized pellets,including phase composition,compressive strength,microstructure and soft melting area,were investigated with FactSage thermodynamic software and *** strength of metallized pellets depended on the gangue composition,such as CaO,MgO,Al_(2)O_(3) and SiO_(2),due to the altered chemical composition,physical phase composition,microscopic morphology and stability of the slag *** reduction of carbon-bearing pellets was significantly promoted by suitable *** lower basicity(R_(4)1.8)also increased the amount of liquid phase and improved the strength of the pellets,due to the granular iron crystals bonded into ***,the main component of the liquid phase in high-basicity conditions was calcium *** the additional amount of liquid phase was beneficial to the strength of the metallized pellets,calcium disilicate was formed at R_(4)=1.6,resulting in a reduction in the compressive strength of the pellets to 1521.9 N/pellet.

关键词： Metallurgical solid waste Iron-bearing dust Iron-bearing sludge Rotary hearth furnace Quaternary basicity Metallized pellet High-temperature performance Metallized pellet High-temperature performance

An optimization of harmonic structure nickel-saving cryogenic steel via combinatorial high-throughput experiment

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 Iron and Steel Research International 2023年第5期30卷 1042-1049页

作者： Xing-qi Jia Feng-hua Lu Kai Yang Shi-long Liu Chun Yu Wei Li Xue-jun Jin Shanghai Key Laboratory of Materials Laser Processing and Modification Shanghai Jiao Tong UniversityShanghai 200240China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106JiangsuChina

A combinatorial high-throughput experiment(HTE)was used to optimize composition and process of nickel-saving cryogenic steel.A gradient temperature heat treatment method with a high linear distribution of heat treatment temperature using customized graphite sleeve direct current heating was used in the combinatorial HTE,which enhanced the richness of the sample library for the single preparation of the 10^(2) level component process *** steel with excellent mechanical properties was optimized using this combinatorial HTE,and the Ni content was reduced from the traditional 9 to 5.6 wt.%by using Mn instead of *** heterogeneous structure architecture strategy and strengthening and toughening mechanism of the harmonic structure induced by intrinsic heat treatment of additive manufacturing were *** the composition process optimization of Ni-saving cryogenic steel as an example,the boosting ability of combinatorial HTE in the research and development of new metal materials was proposed.

关键词： High-throughput experiment Laser metal deposition Gradient heat treatment Cryogenic steel Heterogeneous structure

Comparative genomic analyses reveal cis-regulatory divergence after polyploidization in cotton

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Crop Journal 2022年第6期10卷 1545-1556页

作者： Jiaqi You Min Lin Zhenping Liu Liuling Pei Yuexuan long Lili Tu Xianlong Zhang Maojun Wang National Key Laboratory of Crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070HubeiChina School of Pharmaceutical Sciences South-Central University for NationalitiesWuhan 430074HubeiChina

Polyploidization has long been recognized as a driver for the evolutionary formation of superior plant traits coupled with gene expression ***,knowledge of the effect of regulatory variation on expression changes following polyploidization remains *** this study,we characterized transcriptional regulatory divergence by comparing tetraploid cotton with its putative diploid *** identified 144,827,99,609,and 219,379 Tn5 transposase-hypersensitive sites(THSs)in Gossypium arboreum,***,and ***,respectively,and found that the conservation of promoter THSs was associated with coordination of orthologous genes *** observation was consistent with analysis of transcription-factor binding sites(TFBS)for 262 known motifs:genes with higher TFBS conservation scores(CS)showed less change than those genes with lower TFBS CS in expression *** influenced by genomic variation were involved in the novel regulation networks between transcriptional factors and target genes in tetraploid *** describe an example showing that the turnover of TFBS was linked to expression pattern divergence of genes involved in fiber development(fiber-related genes).Our findings reveal the regulatory divergence of the transcriptional network in cotton after polyploidization and characterizes the regulatory relationships of genes contributing to desirable traits.

关键词： Cotton Polyploidization Transcriptional regulation Fiber development

Combined therapy versus anti-vascular endothelial growth factor monotherapy for polypoidal choroidal vasculopathy： a Meta-analysis

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2017年第8期10卷 1280-1289页

作者： long-Hui Han Li-Fei Yuan Xu Liang Xin Jia Ming-Lian Zhang Hebei Provincial Eye Institute Hebei Provincial Eye HospitalXingtai 054001 Hebei Province China Tianjin Eye Hospital Tianjin 300020 China

AIM： To evaluate the efficacy and safety of anti-vascular endothelial growth factor （VEGF） combined with photodynamic therapy （PDT） versus anti-VEGF monotherapy for polypoidal choroidal vasculopathy （PCV）. METHODS： We conducted a Meta-analysis of 9 studies to compare the efficacy and safety between combined therapy and anti-VEGF monotherapy for PCV. The programs of RevMan 5.3 and Stata 12.0 were used to analyze data. RESULTS： The best corrected visual acuity （BCVA） in combined therapy group were significantly better than those of anti-VEGF monotherapy group at 6, 24 and 36mo, with pooled weighted means differences （WMDs） of 0.12 （0.06, 0.18）, 0.25 （0.12, 0.38） and 0.28 （0.13, 0.43）, respectively. The central retinal thickness （CRT） reductions in combined therapy group were higher than that in anti- VEGF monotherapy group at 1, 3, 6 and 9mo, with pooled WMDs of 63.90 （20.41, 107.38）, 33.47 （4.69, 62.24）, 30.57 （0.12, 60.01） and 28.00 （2.51, 53.49）, respectively. The regression rate of polyps in combined therapy group was much higher than that in anti-VEGF monotherapy group [RD： 0.47 （0.26, 0.68）; P〈0.0001]. The adverse event retinal hemorrhage did not differ significantly between the two groups. CONCLUSION： Our findings clearly document that anti- VEGF combined with PDT is a more effective therapy for PCV compared with anti-VEGF monotherapy. Furthermore, combined therapy does not increase the incidence of retinal hemorrhage.

关键词： vascular endothelial growth factor photodynamic therapy polypoidal choroidal vasculopathy

Wear fault diagnosis of an emulsion pump crank bearing

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 China University of Mining and Technology 2008年第3期18卷 470-474页

作者： HAN Xiao-ming DU Chang-long ZHANG Yong-zhong TIE Zhan-xu School of Mechanical and Power Engineering Henan Polytechnic University Jiaozuo Henan 454003 China School of Mechanical and Electronic Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

The total load on a crank bearing was calculated by performing a load analysis of the crank connecting rod mechanism. The Reynolds equation for hydrodynamic lubrication of the crank bearing was established at the Reynolds boundary condition and was then solved using the Holland method. From this the regular track of the beating axis was obtained. As the crank beating gradually wears the eccentricity ratio corresponding to the minimum oil film thickness increases gradually. The oil-bound film eventually breaks down, which allows friction and collision between the metal surfaces of the crank pin and the bearing. The rigid impact leads to excitation of high frequency vibrations at the natural frequencies of the connecting rod. The experiments show that the wear condition of the crank beating can be identified correctly through the vibration signature at the natural frequencies of the connecting rod. The degree of wear can be predicted accurately through the energy content of the high frequency bands.

关键词： emulsion pump crank beating wear diagnosis