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Chinese Journal of Structural Chemistry 2010年第10期29卷 1574-1578页

作者： ZHOU zhong-zhen YOU Wen-Wei ZHAO Pei-Liang Department of Chemistry College of Pharmaceutical SciencesSouthern Medical University

The title compound,(Z)-methyl-3-methoxy-2-{2-[(4-(E-3-p-tolylacryloyl)phenoxy)-methyl]phenyl}acrylate,was synthesized and determined by X-ray single-crystal *** crystal belongs to the triclinic system,space group P1 with a=8.0157(8),b=12.5748(13),c=13.3768(14)Å,α=64.770(2),β=75.720(2),γ=89.784(2)°,μ=0.085 mm^(-1),Mr=442.49,V=1174.1(2)Å3,Z=2,Dc=1.252 g/cm^(3),F(000)=468,T=294(2)K,R=0.0603 and wR=0.1498 for 2644 observed reflections with I〉2σ(I).X-ray diffraction analysis reveals that the single crystal contains strong non-classical hydrogen *** preliminary bioassay showed that the title compound exhibits inhibitory activity against the Pseudoperoniospora cubensis and Rhizoctonia solani at the test concentration of 200 mg/L.

关键词： synthesis crystal structure (Z)-methyl-3-methoxy-2-{2-[(4-(E-3-p-tolylacryloyl)phenoxy)methyl]phenyl}acrylate

Cable-like Au@SiO2 Janus composite nanorods

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Chinese Chemical Letters 2018年第3期29卷 353-356页

作者： Tian-Hao Han Fu-Xin Liang zhen-zhong Yang State Key Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100190 China

Cable-like Au@SiO2 Janus composite nanorods with PS and PEG grafting on both ends respectively are fabricated by skiving in combination of a post favorable modification. The cable-like Au@SiO2 composite nanofibers are synthesized in the channel of porous anodic aluminium oxide （AAO） membrane. After skiving, the corresponding composite nanorods are obtained. Following, PEG-SH and PS-SH are conjugated onto the two ends of the nanorods by a selective partial modification, respectively. Length and diameter of the Au@SiO2 Janus composite nanorods can be tuned controllably. It can be extended to fabricate a variety of different Janus nanorods with different compositions and microstructures.

关键词： AAO membrane Janus Nanomds Skiving Selective modification

A SPECTRAL METHOD FOR A CLASS OF NONLINEAR QUASI-PARABOLIC EQUATIONS

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Journal of Computational Mathematics 1994年第1期12卷 88-97页

作者： Zhou zhen-zhong (Hunan Computing Center, Changsha, China) HUNAN COMP CTR CHANGSHAPEOPLES R CHINA

In this paper, we consider the numerical solution of quasi-parabolic equations of higher order by a spectral method, and propose a computational formula. We give an error estimate of approximate solutions, and prove the convergence of the approximate method and numerical stability on initial values. Under certain conditions, which are much weaker than the conditions in [6], we gain the same convergence rate as in [6].

关键词： Math A SPECTRAL METHOD FOR A CLASS OF NONLINEAR QUASI-PARABOLIC EQUATIONS

Separation of mandelic acid and its derivatives with new immobilized cellulose chiral stationary phase

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第7期14卷 615-620页

作者： Jie ZHOU Qian LIU Guang-jun FU zhen-zhong ZHANG Key Laboratory of State Ministry of Education for Pharmaceutical Technology School of Pharmacy Zhengzhou University

A new liquid chromatographic method has been developed for the chiral separation of the enantiomers of mandelic acid and their derivatives 2-chloromandelic acid, 4-hydroxymandelic acid, 4-methoxymandelic acid, and 3,4,5-trismethoxymandelic acid. The enantiomers were separated by a CHIRALPAKIC (250 mm×4.6 mm, 5 μm). Mandelic acid, 4-methoxymandelic acid, and 3,4,5-trismethoxymandelic acid were baseline resolved (resolution factor (RS )=2.21, RS =2.14, and RS =3.70, respectively). In contrast, the enantioselectivities between CHIRALPAKIC and 2-chloromandelic acid and 4-hydroxymandelic acid investigated were low. By comparing the chromatographs of mandelic acid enantiomers and mandelic acid spiked with (R)-mandelic acid, it was determined that the first effluent was (R)-mandelic acid.

关键词： CHIRALPAKIC Enantiomeric separation High-performance liquid chromatography (HPLC) Mandelic acid Derivatives

Specialized Microglia Resolve Neuropathic Pain in the Spinal Cord

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Neuroscience Bulletin 2023年第1期39卷 173-175页

作者： Jing Yang Shulan Xie Shengmei Zhu zhen-zhong Xu Department of Anesthesiology and Department of Neurobiology of the First Affiliated Hospital Zhejiang University School of MedicineHangzhou310058China NHC and CAMS Key Laboratory of Medical Neurobiology MOE Frontier Science Center for Brain Research and Brain–Machine IntegrationSchool of Brain Science and Brain MedicineZhejiang UniversityHangzhou310058China

Neuropathic pain is a major health problem affecting up to 10%of the general population,resulting from a lesion or dysfunction of the somatosensory nervous system,including peripheral nerve injury(PNI)^([1]).However,neuropathic pain is difficult to treat because of its obscure *** types of neuropathic pain have been modelled in rodents to study its underlying mechanisms and identify novel therapeutic targets.

关键词： pain mechanisms Spinal

Preparation and characterization of TiO_2/acrylic resin composite coatings on sintered NdFeB permanent magnets by electrochemical deposition

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Rare Metals 2014年第6期33卷 703-708页

作者： zhen-Chen zhong Ji-Lin Xu zheng-Xian Huang Jun-Ming Luo School of Materials Science and Engineering Nanchang Hangkong University

The sintered Nd Fe B permanent magnets are widely used in various industries because of their excellent magnetic and comprehensive properties. However, they are seriously hindered to further developments and applications owing to its poor corrosion resistance. In this paper,TiO2/acrylic resin composite coatings were successfully prepared on the sintered Nd Fe B permanent magnets by electrochemical deposition for the first time, and the corrosion behaviors were investigated by using immersion testing and potentiodynamic polarization tests. It is found that the coating is a composite, being composed of polymerized acrylic resin as the matrix and nano-rutile TiO2particles（-200 nm） as the reinforcements. It is about25 lm in thickness and its surface and cross-section exhibit uniform and smooth with no pores, cracks, and other defects. Compared with those of the uncoated Nd Fe B magnets, the weight loss of the coated samples immersed in H2SO4 solution reduces by two orders of magnitude,corrosion current density decreases by four orders of magnitude, and the corrosion potential of the coated sample is shifted in the noble direction by 400 m V. The mechanisms of corrosive resistance enhancement were discussed.

关键词： NdFeB magnets Nano-TiO2 Acrylic resin Electrophoretic deposition Corrosion resistance

Synthesis of Obyanamide, a Marine Cytotoxic Cyclic Depsipeptide

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Chinese Chemical Letters 2006年第3期17卷 285-288页

作者： Wei ZHANG Ni SONG zhong zhen LI Ying Xia LI Key Laboratory of Marine Drugs the Ministry of Education of China Marine Drug and Food Institute Ocean University of China Qingdao 266003

The synthesis of a marine cytotoxic cyclic depsipeptide obyanamide has been accomplished. The key steps include assembling liner pentapeptide via Yamaguchi esterification and HATU-promoted ring closing. The structure of the synthetic sample was identified by ^1H and ^13C NMR, H-H COSY, HMQC, HMBC, and HRESIMS, but appears to be different from that of the marine natural product.

关键词： Obyanamide synthesis cyclic depsipeptide natural product.

Bibliometric review of visual computing in the construction industry

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 137-151页

作者： Heng-Wei Wang zhen-zhong Hu Jia-Rui Lin Tsinghua Holdings Company Limited Beijing 100084China Department of Civil Engineering Tsinghua UniversityBeijing 100084China Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China

In the construction area,visuals such as drawings,photos,videos,and 3D models,play a significant role in the design,build and maintenance of a facility,bringing efficiency to generate,transfer,and store *** visual computing techniques facilitate the understanding of design contents,work plans,and other types of information shared in the construction *** visual data collection and analysis provide many possibilities to the construction industry and a large number of works have investigated how visual computing can improve construction management processes and other problems in the construction ***,a comprehensive literature review is *** study uses bibliometric approaches to review the works published to date,and analyses the development of knowledge,significant research results,and *** purpose of this study is to help newcomers to this research field understand knowledge structure and formulate research directions,thereby enhancing knowledge *** this study,it can be concluded that computer vision is a key axis of ***,building information modeling,laser scanning,and other visualizationrelated techniques are also important in advancing the construction area.

关键词： Visual computing Bibliometric analysis Construction application Building information modeling Laser scanning Augmented reality Construction management

Gut microbiota in gastrointestinal diseases during pregnancy

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World Journal of Clinical Cases 2022年第10期10卷 2976-2989页

作者： zhong-zhen Liu Jing-Hua Sun Wen-Jing Wang BGI-Shenzhen Shenzhen 518083Guangdong ProvinceChina College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China

Gut microbiota(GM)is a micro-ecosystem composed of all microorganisms in the human *** interaction between GM and the host plays an important role in maintaining normal physiological functions in the *** of the GM may cause various *** has been demonstrated to be associated with human health and disease,and changes during individual development and *** is a complicated physiological ***,the immune system,metabolism,and GM undergo drastic changes during *** diseases during pregnancy,such as hepatitis,intrahepatic cholestasis of pregnancy,and pre-eclampsia,can affect both maternal and fetal *** dysregulation of GM during pregnancy may lead to a variety of diseases,including gastrointestinal ***,we review recent research articles on GM in pregnancy-related gastrointestinal diseases,discuss the interaction of the GM with the host under normal physiological conditions,gastrointestinal diseases,and pregnancy-specific *** more attention is paid to reproductive health,the pathogenic mechanism of GM in gastrointestinal diseases during pregnancy will be further studied to provide a theoretical basis for the use of probiotics to treat these diseases.

关键词： Gut microbiota Microbiome Pregnancy Gastrointestinal diseases Hormones Immunity Metabolites

Ancient subsurface structure beneath crater Clavius:constraint by recent high-precision gravity and topography data

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Research in Astronomy and Astrophysics 2019年第1期19卷 95-102页

作者： zhen zhong Jian-Guo Yan J.Alexis P.Rodriguez School of Physics and Electronic Science Guizhou Normal University State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan University Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal University Planetary Science Institute

With the increasing precision of the GRAIL gravity field models and topography from LOLA, it is possible to investigate the substructure beneath crater Clavius. An admittance between gravity and topography data is commonly used to estimate selenophysical parameters, including load ratio, crustal thickness and density, and elastic thickness. Not only a surface load, but also a subsurface load is considered in estimation. The algorithm of particle swarm optimization(PSO) with a swarm size of 400 is employed as *** indicate that the observed admittance is best-fitted by the modeled admittance based on a spherical shell model, which was proved to be unsatisfactory in the previous study. The best-fitted load ratio f is around-0.194. Such a small load ratio conforms to the direct proportion between the nearly uncompensated topography and its corresponding negative gravity anomaly. It also indicates that a surface load dominates all the loads. Constrained within 2σSTD, a small crustal thickness(～30 km) and a crustal density of ～2587 kg m-3are found, quite close to the results from previous GRAIL research. Considering the well constrained crustal thickness and density, the best-fitted elastic thickness(～7 km) is rational. This result is slightly smaller than the previous study(～12 km). Such difference can be attributed to the difference in crustal density used and the precision of gravity and topography data. Considering that the small difference between the modeled gravity anomaly and observations is quite small, a parameter inversed here could be an indicator of the subsurface structure beneath Clavius.

关键词： Moon planetary systems:planets and satellites:fundamental parameters planetary systems methods:data analysis