检索结果-南通市图书馆

Opportunities and challenges of biodegradable zn-based alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第11期42卷 136-138页

作者： H.F.Li z.z.shi L.N.Wang Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China

Following the footsteps of biodegradable Mg-based and Fe-based alloys,biodegradable zn-based alloy is a newcomer and rising star in the family of biodegradable metals and *** combined superior mechanical properties,appropriate degradation rates,excellent biocompatibility of biodegradable zn-based alloys have brought worldwide research interest on the design,development and clinical translation of zn-based *** present perspective has summarized opportunities and challenges in the development of biodegradable zn-based alloys.

关键词： Biodegradable zn-based alloys Clinical applications Mechanical properties Degradation behavior Biocompatibility Corrosion fatigue Bio-tribocorrosion

The Synthesis of Dialdehyde from Sodium Hydrogen Telluride with 1,1',3,3'-Tetramethyl-2,2'-bis-benzimidazolium Salt

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2002年第9期13卷 836-838页

作者： Yue, KF Gu, H shi, z Northwest Univ Dept Chem Xian 710069 Peoples R China

The reaction of bis-benzimidazolium salts with sodium hydrogen telluride is reported, and a new synthetic method for dialdehydes is provided.

关键词： Bis-benzimidazolium salt sodium hydrogen telluride dialdehyde synthesis.

The synthesis of dialdehydes from dicarboxylic acids via imidazolines

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第2期42卷 130-132页

作者： shi, z Gu, H Xu, LL Department of Chemistry Northwest University Xi’an China

DIALDEHYDES are important chemical industrial materials, which are widely used in textile,medicine, dye, binder, coating and so on. The traditional method for preparing dialdehydes is the catalytic oxidation of glycol. We have reported the reduction ring-opening reaction of inndazoline by NaBH4.In this note, the reduction of imidazoline by sodium and ethanol is studied. A new synthetic method for the preparation of dialdehydes from dicarboxylic acids

关键词： dicarboxylic acid imidazoline dialdehyde new synthetic method.

Professor zhao-Yin Wang,Ph.D.,*** Editor-in-Chief of the International Journal of Sediment Research

在线全文

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2014年第1期29卷 133-134页

作者： John z.shi Hong-Wei Fang Shanghai Jiao Tong University Tsinghua University

(January 1998-December 2013)Current developments in sediment research continue at a heady pace,and are reported in the International Journal of Sediment Research(IJSR)at about 500 pages per ***,as of January 2014,a major change has occurred:after16 years(January 1998 to December 2013)as Editor-in-Chief,Professor zhao-Yin Wang has stepped down from the handling of manuscripts.

关键词： Wang M.ASCE Editor-in-Chief of the International Journal of Sediment Research Professor zhao-Yin Wang,Ph.D

WAVE RESISTANCE OF WAVE-PIERCING CATAMARANS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2000年第4期12卷 88-98页

作者： Lu, X.P. Huang, Y. shi, z.K. Coll. of Traffic Sci. and Eng. Huazhong Univ. of Sci. and Technol. Wuhan 430074 China

Present paper researches the theoretical method for calculating the wave resistance of wave-piercing catamaran. As an example the wave resistance of a wave-piercing catamaran is calculated. The comparison among the theoretical calculation results, the model test results and the graphic evaluation results shows the efficiency of present theoretical method. Finally the wave resistance regulation of wave-piercing catamarans is investigated based on the theoretical method.

关键词： ships

Study of the mechanisms of acupuncture and moxibustion treatmentfor ulcerative colitis ratsinview of the gene expression of cytokines

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 1999年第6期5卷 515-517页

作者： Wu HG zhou LB Pan YY Huang C Chen HP shi z Hua XG Shanghai Inst Acupuncture Moxibust & Meridians Shanghai 200030 Peoples R China

AIM:To observe the effect of acupuncture and moxibustion on the expression of IL-1beta and IL-6 mRNA in ulcerative colitis ***:The SD rat ulcerative colitis model was created by immunological method associated with local stimulation. Colonic mucosa was prepared from human fresh surgical colonic specimens, homogenized by adding appropriate amount of normal saline and centrifuged at 3000r/min. The supernatant was collected for measurement of protein conentration and then mixed with Freund adjuvant. This antigen fluid was first injected into the plantae of the model group rats, and then into their plantae, dorsa, inguina and abdominal cavities (noFreund adjuvant for the last injection) again on the 10th, 17th, 24th and 31st day. When a certain titer of serum anti colonic antibody was reached, 2% formalin and antigen fluid (no Freund adjuvant) were administered separately by enema. The ulcerative colitis rat model was thus set up. The animals were randomly divided into four groups: model control group (MC, n = 8), electro acupuncture group (EA, n = 8), herbs partition moxibustion group (HPM 8), normal control group (NC,n = 8). HPM: Moxa cones made of refined mugwort floss were placed on the medicinal pad (medicinal pad dispensing: Radix Aconiti praeparata, cortex Cinnamomi, etc) for Qihai (RN 6) and Tianshu (ST 25, bilateral) and ignited. Two moxa cones were used for each acupoint once a day and 14 times in all. EA: Tianshu (bilateral) and Qihai were stimulated by the intermittent pulse with 2Hz frequency, 4mA intensity for 20 minutes once a day and 14 times in all. After treatment, rats of all four groups were killed simultaneously. The spleen was separated and the distal colon was dissected. Total tissue RNA was isolated by the guanidinium thiocyanate phenol chloroform extraction method. RT-PCR technique was used to study the expression of IL-1 beta and IL-6 ***:IL-1 beta and IL-6 mRNAs were not detected in the spleen and colonic mucosa of the NC rat

关键词： colitis, ulcerative/therapy acupuncture and moxibustion therapy gene expression cytokines interleukin-1 beta interleukin-6

Crack Initiation Mechanism of z3CN20.09M Duplex Stainless Steel during Corrosion Fatigue in Water and Air at 290 °C

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 Materials Science & Technology 2015年第11期31卷 1144-1150页

作者： H.C.Wu B.Yang Y.z.shi Q.Gao Y.Q.Wang State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Collaborative Innovation Center of Universal Iron & Steel Technology School of Materials Science and Engineering Anhui University of Technology

The crack initiation mechanism of a z3CN20.09M duplex stainless steel （DSS） during corrosion fatigue （CF） in water and air at 290 ℃ was investigated by using a CF cracking machine and a scanning electron microscopy （SEM）. The cracks were initiated successively at the persistent stip bands （PSBs）, phase boundaries （PBs） and pitting corrosion points （PCPs） of the specimens when they were tested in water at 290 ℃, while in airat 290 ℃ the cracks were only initiated at the PSBs and PBs. And the cracks were found mainly to initiate at the PSBs and PBs when the specimens were tested in water and air at 290 ℃, respectively. The results also reveal that the cracks were likely to be initiated at the first 20% of fatigue life of the specimens tested in water at 290 ℃. However, the cracks were not found until 50% of fatigue life when tested in air at 290 ℃. Moreover, the crack numbers of the specimens tested in water at 290 ℃ were much more than those tested in air at 290 ℃.

关键词： Duplex stainless steel Corrosion fatigue Crack initiation High temperature water

RESEARCH ON MEASURING METHOD OF THE THERMALCONDUCTIVITY FOR HIGHLY POROUS MATERIALS

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1997年第3期10卷 213-218页

作者： J Y Wu z.M. Tang W shi andR.z. Wang (Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiao Tong University, Shanghai 200030,China) Shanghai Jiaotong Univ Shanghai China

A transient method with rectangular pulse heating has been developed to measure the thermal conductivity of highly porous materials such as activated carbon, zeolite and silica gel. By this method the thermal conductivity can be measured quickly and accu-rately. In this paper, a set of automatically controlled testing equiptnent is *** measuring method is analysed. The thermal conductivities of some samples, such as activated carbon and zeolite, are measured by the equipment. A group of useful data has been obtained.

关键词： thermal conductivity porous material thermophysical property

Triaxially deformed relativistic Hartree–Bogoliubov theory in Woods–Saxon basis

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2023年第4期75卷 50-62页

作者：夏学伟施智 School of Physics and Electronic Engineering Center for Computational SciencesSichuan Normal UniversityChengdu 610068China United Imaging Healthcare Shanghai 201800China

A triaxially deformed relativistic Hartree–Bogoliubov theory in the Woods–Saxon basis is developed with the aim of treating the triaxial deformation,pairing correlations and continuum in a unified *** order to consider the triaxial deformation,the deformed potentials are expanded in terms of spherical harmonic functions in the coordinate *** order to take the pairing correlations into account and treat the continuum properly,by using the Dirac Woods–Saxon basis,which has correct asymptotic behavior,the relativistic Hartree–Bogoliubov equation with triaxial deformation is *** formalism of triaxially deformed relativistic Hartree–Bogoliubov theory in Woods–Saxon basis is *** an axially deformed nucleus24Ne and a triaxially deformed nucleus76Ge as examples,the numerical checks are performed.A weakly bound nucleus112Ge is taken as an example to carry out the necessary converge checks for the numerical *** addition,the ground-state properties of even–even germanium isotopes are *** evolutions of two-neutron separation energy,deformation,root-mean-square radii and density distribution with mass number are *** comparison between the calculations from the relativistic Hartree–Bogoliubov theory based on harmonic-oscillator basis and the triaxially deformed relativistic Hartree–Bogoliubov theory in Woods–Saxon basis is *** is found that the neutron drip line is extended from114Ge to118Ge in the triaxially deformed relativistic Hartree–Bogoliubov theory in Woods–Saxon basis.

关键词： covariant density functional theory deformed relativistic Hartree-Bogoliubov theory triaxial deformation continuum effect exotic nuclei