检索结果-南通市图书馆

Polymer Electron Acceptors Based on Fluorinated Isoindigo Unit for Polymer Solar Cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2018年第5期36卷 411-416页

作者： Junhui Miao Hall Xu Bin meng Jun Liu Lixiang Wang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Chang- chun Jijin 130022 China University of Science and Technology of China Hefei Anhui 230026 China Center for Advanced Optoelectronic Functional Materials Research Northeast Normal University Changchun Jilin 130024 China

Most of efficient polymer electron acceptors for polymer solar cells （PSCs） are based on naphthalene diimide or perylene diimide as the electron deficient building block. In this paper, for the first time, we report polymer electron acceptors based on fluorinated isoindigo IF-lID） as the electron deficient building block. We synthesized two polymer electron acceptors consisting of alternating F-lID unit and thiophene/selenophen unit, They show low-ly.ng LUMo/HOMO energy levels of-3.69/-5.69 eV, high electron mobilities of 1.31 ×10-5 cm2.V-1s-1 and broad absorption spectra with the optical bandgap of 1.61 eV. PSC devices using the two F-liD-based polymers as polymer electron acceptors show encouraging power conversion efficiencies （PCEs） of up to 1.50% with an open-circuit voltage （Voc） of 0.97V, a short-circuit current density （Jsc） of 2.91 ***2, and a fill factor （FF） of 53.2%. This work suggests a new kind of polymer electron acceptors based on F-IID unit.

关键词： polymer solar cells polymer electron acceptor fluorinated isoindigo n-type conjugated polymer

Comparative transcriptomic insights into the mechanisms of electron transfer in Geobacter co-cultures with activated carbon and magnetite

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2018年第7期61卷 787-798页

作者： Shiling Zheng Fanghua Liu meng Li Leilei Xiao Oumei Wang Key Laboratory of Coastal Biology and Biological Resources Utilization Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Institute for Advanced Study Shenzhen UniversityShenzhen 518060China Binzhou Medical University Yantai 264003China

Both activated carbon and magnetite have been reported to promote the syntrophic growth of Geobacter metallireducens and Geobacter sulfurreducens co-cultures, the first model to show direct interspecies electron transfer (DIET); however, differential transcriptomics of the promotion on co-cultures with these two conductive materials are unknown. Here, the comparative transcriptomic analysis of G. metallireducens and G. sulfurreducens co-cultures with granular activated carbon (GAC) and magnetite was reported. More than 2.6-fold reduced transcript abundances were determined for the uptake hydrogenase genes of G. sulfurreducens as well as other hydrogenases in those co-cultures to which conductive materials had been added. This is consistent with electron transfer in G. metallireducens-G. sulfurreducens co-cultures as evinced by direct interspecies electron transfer (DIET). Transcript abundance for the structural component of electrically conductive pili (e-pili), PilA, was 2.2-fold higher in G. metallireducens, and, in contrast, was 14.9-fold lower in G. sulfurreducens in co-cultures with GAC than in Geobacters co-cultures without GAC. However, it was 9.3-fold higher in G. sulfurreducens in co-cultures with magnetite than in Geobacters co-cultures. Mutation results showed that GAC can be substituted for the e-pili of both strains but magnetite can only compensate for that of G. sulfurreducens, indicating that the e-pili is a more important electron acceptor for the electron donor strain of G. metallireducens than for G. sulfurreducens. Transcript abundance for G. metallireducens c-type cytochrome gene GMET_RS14535, a homologue to c-type cytochrome gene omcE of G. sulfurreducens was 9.8-fold lower in co-cultures with GAC addition, while that for OmcS of G. sulfurreducens was 25.1-fold higher in co-cultures with magnetite, than in that without magnetite. Gene deletion studies showed that neither GAC nor magnetite can completely substitute the cytochrome (OmcE homologou

关键词： comparative transcriptomics Geobacter direct interspecies electron transfer(DIET) activated carbon magnetite

Evaluation of semen quality in 1808 university students, from Wuhan, Central China

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2015年第1期17卷 111-116,I0010页

作者： meng Rao Tian-Qing meng Si-Heng Hu Huang-Tao Guan Qin-yu Wei Wei Xia Chang-Hong Zhu Cheng-Liang Xiong Family Planning Research Institute Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei 430030 China Reproductive Medicine Center Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei 430030 China Hubei Province Human Sperm Bank Wuhan Hubei 430030 China Department of Epidemiology and Biostatistics School of Public Health Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei 430030 China.

The aim of this study was to evaluate the semen quality of university students in Wuhan, the largest city in the world in terms of the number of university students. All student sperm donors recorded in the Hubei Province Human Sperm Bank from 1 March 2010 to 31 December 2013 were screened. At last, a total of 3616 semen samples from 1808 university student sperm donors were eligible and retrospectively analyzed. Each donor＇s semen parameters were averaged over two samples and compared with the World Health Organization criteria, and a generalized linear regression model was used to examine several determinants of semen quality. We found that the mean and median values were 3.0 ml and 2.8 ml for semen volume, 50.2 x 106 m1-1 and 50.0 x 106 m1-1 for sperm concentration, 148.1 x 106 and 142.1 x 106 for total sperm count, and 58.6% and 60.0% for total sperm motility. About 85.0% of donors had parameters that were all normal. Season and duration of abstinence were critical factors affecting semen quality. We also found a decrease in sperm concentration during the 4 years observation; however, this may not be a strong evidence to confirm the declining trend of semen quality. In conclusion, semen quality of university students in Wuhan was not optimal and should be paid high attention, long-term observation and further study should be carried out to confirm the present situation.

关键词： semen analysis semen quality sperm donors university students

MARIS plays important roles in Arabidopsis pollen tube and root hair growth

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 Plant Biology 2016年第11期58卷 927-940页

作者： Hong-Ze Liao meng-meng Zhu Hong-Hui Cui Xin-yu Du yu Tang Li-Qun Chen De ye Xue-Qin Zhang State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural University Department of Biological Science and Bioengineering School of Life Science and TechnologyXi’an Jiaotong University Biology Department Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA

In flowering plants, male gametes are delivered to female gametes for double fertilization through pollen tubes. Therefore, pollen tube growth is crucial for double fertilization. Despite its importance to sexual reproduction, genetic mechanisms of pollen tube growth remain poorly understood. In this study, we characterized the receptor-like cytoplasmic protein kinase （RLCK） gene, MARLS （MRI） that plays critical roles in pollen tube growth. MRI is preferentially expressed in pollen grains, pollen tubes and roots. Mutation in MRI by a Ds insertion led to a burst of pollen tubes after pollen germination. Pollen-rescue assay by pollen and pollen tubespecific expression of MRI in the mri-4 mutant showed that loss of MRI function also severely affected root hair elongation. MRI protein interacted with the protein kinase OXIDATIVE SIGNAL INDUCIBLEI （OXII） in the in vitro and in vivo assays, which functions in plant defence and root hair development, and was phosphorylated by OXII in vitro. Our results suggest that MRI plays important roles in pollen tube growth and may function in root hair elongation through interaction with OXII.

关键词： Arabidopsis pollen tube protein kinase receptor-likecytoplasmic protein kinases root hair

Atomic insights of electronic states engineering of GaN nanowires by Cu cation substitution for highly efficient lithium ion battery

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第4期31卷 46-54页

作者： Zhenjiang Li Kesheng Gao y.ng Han Shiqi Ding y.nglansen Cui Minmin Hu Jian Zhao meng Zhang Alan meng Jimmy yun Zhiming Liu Da-Wei Wang Changlong Sun College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina School of Chemical Engineering The University of New South WalesSydneyNSW 2052Australia Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials College of Electromechanical EngineeringQingdao University of Science and TechnologyQingdao 266061ShandongChina Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina Qingdao International Academician Park Research Institute QingdaoShandong 266000China School of Materials Science and Engineering Beihang University100191 BeijingChina School of Materials Science and Engineering Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Electronic engineering of gallium nitride(Ga N) is critical for enhancement of its electrode *** this work, copper(Cu) cation substituted Ga N(Cu-Ga N) nanowires were fabricated to understand the electronically engineered electrochemical performance for Li ion storage. Cu cation substitution was revealed at atomic level by combination of X-ray photoelectron spectroscopy(XPS), X-ray absorption fine structure(XAFS), density functional theory(DFT) simulation, and so forth. The Cu-Ga N electrode delivered high capacity of 813.2 m A h g^(-1) at 0.1 A g^(-1) after 200 cycles, increased by 66% relative to the unsubstituted Ga N electrode. After 2000 cycles at 10 A g^(-1),the reversible capacity was still maintained at326.7 m A h g^(-1). The DFT calculations revealed that Cu substitution introduced the impurity electronic states and efficient interatomic electron migration, which can enhance the charge transfer efficiency and reduce the Li ion adsorption energy on the Cu-Ga N electrode. The ex-situ SEM, TEM, HRTEM, and SAED analyses demonstrated the reversible intercalation Li ion storage mechanism and good structural stability. The concept of atomic-arrangement-assisted electronic engineering strategy is anticipated to open up opportunities for advanced energy storage applications.

关键词： Cu cation substitution Electronic states engineering GaN nanowires Lithium-ion batteries DFT

Iridium(Ⅲ)-catalyzed two-fold C-H alkylation of BINOLs with allyl alcohols

在线全文

学校读者我要写书评

暂无评论

Organic Chemistry Frontiers 2022年第2期9卷 471-475页

作者： Hao Liu Wei Chi meng-Ling Lin Lin Dong Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China

Ir(Ⅲ)-Catalyzed C-H alkylation of BINOL units has been well examined by using allyl alcohols as coupling *** the advantage of the pyridine guiding group,the efficient protocol allows the rapid synthesis of diverse BI... 详细信息

关键词： alcohols allyl

Study on the interactions between anti-tumor metal complexes and mononucleotides using trans-[en_(2)Os(h^(2)-H_(2))(CF_(3)SO_(3))](CF_(3)SO_(3))as a^(1)H NMR probe in a competitive mode

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2005年第3期48卷 227-239页

作者： y.ng Pin CHEN Huili FAN y.ngfang yUE Lijun meng Xiangli Institute of Molecular Science Chemical Biology and Molecular Engineering Laboratory of Education MinistryShanxi UniversityTaiyuan 030006China

The interaction of several anti-tumor metal complexes with dGMP have been investigated using trans-[en_(2)Os(h^(2)-H_(2))]^(2+)as a ^(1)H NMR probe in a competitive ***_(2)SnCl_(2),Bu_(2)SnCl_(2),Et_(2)Sn(phen)Cl_(2) and Et_(2)SnCl_(2) can bind to dGMP mainly via phosphate;Cp_(2)TiCl_(2) binds to dGMP mainly via phosphate and N_(7).The binding constant for(CH_(3))_(2)SnCl_(2) binding to phos-phate of dGMP exceeds 2.71×10^(4).The binding constant for Cp_(2)TiCl_(2) to phosphate is even greater than that of Sn(IV).Cis-platin has high affinity for both N_(7) and phosphate,but mainly for N_(7).Binding of the probe to N_(7) of dGMP reduces the binding affinity for phosphate of the same dGMP molecule by a factor of 5 to *** the same factor is expected to apply to other metals containing agents interacting with dGMP.

关键词： trans-[en_(2)Os(h^(2)-H_(2))]^(2+) dGMP,anti-tumor metal complex competitive mode.

A family of non-conforming crack front elements of quadrilateral and triangular types for 3D crack problems using the boundary element method

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2019年第3期14卷 332-341页

作者： Guizhong XIE Fenglin ZHOU Hao LI Xiaoyu WEN Fannian meng Henan Provincial Key Laboratory of Intelligent Manufacturing of Mechanical Mechanical and Electrical Engineering Institute Zhengzhou University of Light Industry Zhengzhou 450002 China College of Mechanical Engineering Hunan University of Technology Zhuzhou 412007 China

This study focuses on establishing nonconforming crack front elements of quadrilateral and triangular types for 3D crack problems when the dual boundary element method is applied. The asymptotic behavior of the physical variables in the area near the crack front is fully considered in the construction of the shape function. In the developed quadrilateral and triangular crack front elements, the asymptotic term, which captures the asymptotic behavior of the physical variable, is multiplied directly by the conventional Lagrange shape function to form a new crack front shape function. Several benchmark numerical examples that consider pennyshaped cracks and straight-edge crack problems are presented to illustrate the validity and efficiency of the developed crack front elements.

关键词： Taylor expansion crack front elements stress intensity factors dual boundary element method

Monitoring somatosensory evoked potentials in spinal cord ischemia-reperfusion injury

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2013年第33期8卷 3087-3094页

作者： yiming Ji Bin meng Chenxi yuan Huilin y.ng Jun Zou Department of Orthopedic Surgery the First Affiliated Hospital of Soochow University

It remains unclear whether spinal cord ischemia-reperfusion injury caused by ischemia and other non-mechanical factors can be monitored by somatosensory evoked potentials. Therefore, we monitored spinal cord ischemia-reperfusion injury in rabbits using somatosensory evoked potential detection technology. The results showed that the somatosensory evoked potential latency was significantly prolonged and the amplitude significantly reduced until it disappeared during the period of spinal cord ischemia. After reperfusion for 30-180 minutes, the amplitude and latency began to gradually recover; at 360 minutes of reperfusion, the latency showed no significant difference compared with the pre-ischemic value, while the somatosensory evoked potential amplitude in- creased, and severe hindlimb motor dysfunctions were detected. Experimental findings suggest that changes in somatosensory evoked potentia~ ~atency can reflect the degree of spinat cord ischemic injury, while the amplitude variations are indicators of the late spinal cord reperfusion injury, which provide evidence for the assessment of limb motor function and avoid iatrogenic spinal cord injury.

关键词： neural regeneration spinal cord injury somatosensory evoked potentials spinal cord ischemia reperfusion iatrogenic spinal cord injury histopathology abdominal aorta occlusion model latency grants-supported paper neuroregeneration