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Mechanical Properties and Microstructure of Reaction Sintering B4C/SiC Ceramics

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Mechanical Properties and Microstructure of Reaction Sinteri...

Computed tomography enterography-based radiomics for assessing mucosal healing in patients with small bowel Crohn's disease

The 2011 International Conference on Mechanical Materials and Manufacturing Engineering(ICMMME 2011)

作者： W.S.Lin n.x.fang School of Material Engineering Shanghai University of Engineering Science Light-tough Composite Materials Co.Ltd

Reaction sintering B4C/Si C ceramics with high density were *** effect of the carbon content in green bodies on the microstructure and mechanical properties of the ceramics has been *** showed that the carbon content and the value of carbon relative density(ρCRD) in the green bodies were the major factors affected the composition,that is,the free silicon and carbon contents and mechanical behaviors of sintered *** optimal value of ρCRD was gotten at 0.85 g/*** fracture toughness,flexural strength,and hardness of the composites increased with increasing carbon content up to 20 wt.%.The maximum values of fracture toughness of 3.8 MPa·m1/2,flexural strength of 475 MPa,and hardness of 32.0 GPa were obtained under the following process parameters:value of ρCRD in the green bodies was about 0.85 g/cm3;carbon,B4 C and Si C contents in green bodies were 20 wt.%,30 wt.% and 50 wt.%,respectively;compact pressure was 75 MPa and sintering temperature was 1600°C.

关键词： reaction sintering,B4C/Si C,carbon relative density,mechanical property

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World Journal of Gastroenterology 2025年第3期31卷 62-72页

作者： Hao Ding Yuan-Yuan fang Wen-Jie Fan Chen-Yu Zhang Shao-Fei Wang Jing Hu Wei Han Qiao Mei Department of Gastroenterology The First Affiliated Hospital of Anhui Medical UniversityHefei 230022Anhui ProvinceChina Department of Radiation Oncology The First Affiliated Hospital of Anhui Medical UniversityHefei 230022Anhui ProvinceChina Department of Gastroenterology Suzhou First People's HospitalSuzhou 234099Anhui ProvinceChina

BACKGROUnD Mucosal healing(MH)is the major therapeutic target for Crohn's disease(CD).As the most commonly involved intestinal segment,small bowel(SB)assessment is crucial for CD ***,it poses a significant challenge due to its limited accessibility through conventional endoscopic *** To establish a noninvasive radiomic model based on computed tomography enterography(CTE)for MH assessment in SBCD *** Seventy-three patients diagnosed with SBCD were included and divided into a training cohort(n=55)and a test cohort(n=18).Radiomic features were obtained from CTE images to establish a radiomic *** demographics were analysed to establish a clinical model.A radiomic-clinical nomogram was constructed by combining significant clinical and radiomic *** diagnostic efficacy and clinical benefit were evaluated via receiver operating characteristic(ROC)curve analysis and decision curve analysis(DCA),*** Of the 73 patients enrolled,25 patients achieved *** radiomic-clinical nomogram had an area under the ROC curve of 0.961(95%confidence interval:0.886-1.000)in the training cohort and 0.958(0.877-1.000)in the test cohort and provided superior clinical benefit to either the clinical or radiomic models alone,as demonstrated by *** These results indicate that the CTE-based radiomic-clinical nomogram is a promising imaging biomarker for MH and serves as a potential noninvasive alternative to enteroscopy for MH assessment in SBCD patients.

关键词： Crohn’s disease Computed tomography enterography Mucosal healing nomogram Radiomics

Shape-Controlled Synthesis of Platinum-Based nanocrystals and Their Electrocatalytic Applications in Fuel Cells

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nano-Micro Letters 2023年第6期15卷 190-219页

作者： Can Li n.Clament Sagaya Selvam Jiye fang Department of Chemistry State University of New York at BinghamtonBinghamtonNYUSA

To achieve environmentally benign energy conversion with the carbon neutrality target via electrochemical reactions, the innovation of electrocatalysts plays a vital role in the enablement of renewable resources. nowadays, Pt-based nanocrystals(nCs) have been identified as one class of the most promising candidates to efficiently catalyze both the half-reactions in hydrogen-and hydrocarbonbased fuel cells. Here, we thoroughly discuss the key achievement in developing shape-controlled Pt and Pt-based nCs, and their electrochemical applications in fuel cells. We begin with a mechanistic discussion on how the morphology can be precisely controlled in a colloidal system, followed by highlighting the advanced development of shape-controlled Pt, Pt-alloy, Pt-based core@shell nCs, Pt-based nanocages, and Pt-based intermetallic compounds. We then select some case studies on models of typical reactions(oxygen reduction reaction at the cathode and small molecular oxidation reaction at the anode) that are enhanced by the shape-controlled Pt-based nanocatalysts. Finally, we provide an outlook on the potential challenges of shape-controlled nanocatalysts and envision their perspective with suggestions.

关键词： Shape-control Colloidal synthesis Pt-based nanocrystals Electrochemical catalysis

Small modifications of endo-functionalized cavities lead to large changes in molecular interaction in water

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Science China Chemistry 2025年第01期 369-376页

作者： Song-Meng Wang Hao nian Yan-fang Wang Li-Shuo Zheng Yu-Tao Zheng Yi-Wei Dong Liping Huang xiaoping Wang Wei Jiang Liu-Pan Yang Department of Chemistry Southern University of Science and Technology School of Chemistry and Pharmaceutical Sciences State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesGuangxi Normal University School of Pharmaceutical Science Hengyang Medical School University of South China

Studying molecular recognition in aqueous environments is crucial for understanding biological processes. Herein, we present a series of n-doped endo-functionalized anthracene-based cavities by introducing inward-directed pyridine units. The subtle modifications can significantly affect the binding properties of these receptors, which is similar to the mutations in biological systems. Combining theoretical calculations and molecular recognition experiments demonstrated that these “mutations” have an impact on the hydrophobicity and charge distribution of the hosts, consequently significantly influencing molecular *** is crucial for understanding the intricate mechanisms of molecular-level interactions in biological receptors.

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Taxuchin B,a new Chlorine-Containing Taxoid

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Chinese Chemical Letters 1997年第3期8卷 231-232页

作者： fang, WS fang, QC Liang, xT Lu, Y Wu, n Zheng, QT CHInESE ACAD MED SCI INST MAT MEDBEIJING 100050PEOPLES R CHINA BEIJInG UnIOn MED COLL BEIJING 100050PEOPLES R CHINA

A new taxoid, taxuchin B[1], has been isolated from twigs and needles of Taxus chinensis. It is the first chlorine-containing taxoid reported to date.

关键词： Zhang Chen

Hybrid TiO_(2)/Ag nPs/g-C_(3)n_(4) nanocomposite coatings on TC4 titanium alloy for enhanced synergistic antibacterial effect under full spectrum light

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Journal of Materials Science & Technology 2022年第23期118卷 35-43页

作者： xi.Rao L.Du J.J.Zhao x.D.Tan Y.x.fang L.Q.xu Y.P.Zhang School of Materials and Energy Southwest UniversityChongqing 400715China Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing Southwest UniversityChongqing 400715China

The hybrid TiO_(2)/AgnPs/g-C_(3) n_(4) nanocomposite coatings were constructed on TC4 alloy by a hydrothermal and calcining ***_(2)/AgnPs/g-C_(3) n_(4) nanocomposite coatings demonstrated excellent biocompatibility and osteogenesis compared to those of titanium *** existence of trace AgnPs on the surface and interface of the heterojunction could further enhance the transfer and separation of photogenerated electron/hole pairs,which greatly improved the antibacterial performance under full spectrum *** at the valence band of TiO_(2) and g-C_(3) n_(4) reacted with adsorbed H_(2) O to generate·OH,killing bacteria through photocatalytic redox reaction under light irradiation,while released AgnPs exhibited bacteriostatic efficacy with or without *** study provides a pathway of coating modification for further improving the antibacterial properties of heterojunction coatings and maintaining the biocompatibility of matrix materials.

关键词： TiO_(2)/AgnPs/g-C_(3)n_(4)nanocomposite g-C_(3)n_(4) Photocatalysis Photocatalytic inactivation of bacteria Disinfection mechanism

Centro-parietal n200: An event-related potential component specific to Chinese visual word recognition

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Chinese Science Bulletin 2012年第13期57卷 1516-1532页

作者： ZHAnG John.x.fang Zhuo DU YingChun KOnG LingYue ZHAnG Qin xInG Qiang Department of Psychology the Chinese University ofHong Kong Hong Kong China Medical College of Shantou University Shantou 515041 China Key Laboratory of Behavioral Science Institute of Psychology Chinese Academy of Sciences Beijing 100101 China International College of Chinese Language Studies Peking University Beijing 100871 China Department of Psychology Capital Normal University Beijing 100048 China Department of Psychology Guangzhou University Guangzhou 510006 China

Almost all written languages currently used in the world are alphabetic or phonologically-based scripts (e.g., English) whose word recognition involves discrimination of one-dimensional linear combinations of several dozens of letters or phonological units, except written Chinese whose vocabulary consists of a large number of block characters, the analysis of which relies on the extraction of 2-dimensional form information at multiple levels including radical, character, and multiple-character word. Whether the dramatic contrast between the 2 types of orthography leads to distinctive mental processes is a fundamental question in psycholinguistic research unanswered in the past three decades. Using event-related potentials and visual lexical decision tasks, we asked native Chinese speakers to discriminate between real Chinese words and pseudoor non-words and observed a widespread negative deflection with centro-parietal focus elicited 200 ms post-stimulus onset. This n200 response showed a clear and large amplitude enhancement upon word repetition and seems to be specific to Chinese as no similar effects had been reported in word recognition studies involving alphabetic scripts under similar experimental conditions. Further evidence showed that this n200 could not be attributed to non-linguistic sensori-perceptual processes, nor phonological or semantic processes, but likely reflects very early identification of the orthography of individual words involving extensive and higher-level visual analysis. Recently the first author proposed a meaning-spelling theory of written Chinese vocabulary proposing that the Chinese and alphabetic scripts are the only 2 possible logical types of mature human writing systems, and that the former is more thoroughly a visual language compared with the latter and thus shall emphasize more of visual processing. Reinforcing each other, the meaning-spelling theory and the discovery of the centro-parietal n200 reveal the uniqueness of Chines

关键词：事件相关电位 n200 视觉分析早期识别中国词汇英文字母成分

Synthesis and Crystal Structure of a Genistein-derived Compound

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Chinese Journal of Structural Chemistry 2008年第2期27卷 200-204页

作者： ZHAnG Li-n SHI Lei fang Rui-Qin ZHU Hai-Liang School of Life Sciences Nanjing University Nanjing 210093 China

A genistein derivative, 5-hydroxy-3-（4-hydroxyphenyl）-7-（2-（piperidin- 1-yl）ethoxy）- 4H-chromen-4-one 3, was designed, prepared and structurally characterized by single-crystal x-ray diffraction. x-ray structure analysis reveals that 3 crystallizes in the orthorhombic system, space group Pbca, with a = 16.238（3）, b = 10.308（2）, c = 22.987（5）A, V = 3847.6（13）A3, Z = 8,μ= 0.093 mm^-1, Dc = 1.317 g/cm^3, F（000） = 1616, R = 0.0789 and wR = 0.1554 for 1463 observed reflections with I 〉 2σ（I）.

关键词： genistein crystal structure derivative 1,2-dibromoethane piperidine

Establishment of a Gene Expression System in Rice Chloroplast and Obtainment of PPT-Resistant Rice Plants

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Agricultural Sciences in China 2009年第6期8卷 643-651页

作者： LI Yi-nü SUn Bing-yao SU ning MEnG xiang-xun ZHAnG Zhi-fang SHEn Gui-fang Biotechnology Research Institute Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China College of Life Sciences Suzhou University Suzhou 215123 P.R.China Institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China

In contrast to the situation of random integration of foreign genes in nuclear transformation, the introduction of genes via chloroplast genetic engineering is characterized by site-specific pattern via homologous recombination. To establish an expression system for alien genes in rice chloroplast, the intergenic region of ndhF and trnL was selected as target for sitespecific integration of PPT-resistant bar gene in this study. Two DnA fragments suitable for homologous recombination were cloned from rice chloroplast genome DnA using PCR technique, and the chloroplast-specific expression vector pRB was constructed by fusing a modified 16S rRnA gene promoter to bar gene together with terminator ofpsbA gene 3 sequence. Chloroplast transformation was carried out by biolistic bombardment of sterile rice calli with the pRB construct. Subsequently, the regenerated plantlets and seeds of progeny arising from reciprocal cross to the wild-type lines were obtained. Molecular analysis suggested that the bar gene has been integrated into rice chloroplast genome. Genetic analysis revealed that bar gene could be transmitted and expressed normally in chloroplast genome. Thus, the bar gene conferred not only selection pressure for the transformation of rice chloroplast genome, but PPT-resistant trait for rice plants as well. It is suggested that an efficient gene expression system in the rice chloroplast has been established by chloroplast transformation technique.

关键词： Oryza sativa L. chloroplast transformation bar gene homologous fragments