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Probing intermolecular interactions of ZnO-nanoparticle-reinforced molten energetic material

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Rare Metals 2022年第9期41卷 3180-3185页

作者： Qing Ma shu-ming wang Mao-Ping Wen Bao-Hui Zheng Heng-Jian Huang Institute of Chemical Materials China Academy of Engineering PhysicsMianyang621900China Analysis and Testing Center Southwest University of Science and TechnologyMianyang621900China

In this work,metal oxide nanoparticle ZnO was employed for the reinforcement of *** electronic microscopy(SEM)was used to study the microstructure on the fractured surface of TNT/nano-ZnO,and ultraviolet-visible(UV-Vis)spectroscopy was utilized for structure ***,to understand the reinforcing mechanism between ZnO and TNT,quantum chemistry and molecular dynamics simulation were undertaken to investigate the intermolecular interaction and mechanical *** is concluded that with 2.85 wt%ZnO nanoparticle addition,the amount of voids and defects decreases with the increase in bulk and shear *** modified TNT/ZnO composite has high heat of formation,negative oxygen balance,and good detonation properties,which is expected to be a candidate for high-energy blended explosives.

关键词： 2 4 6-Trinitrotoluene Zinc oxide Intermolecular interaction Molecular dynamics simulation

Plasmonic polarization generator in well-routed beaming

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Light(Science & Applications) 2015年第1期4卷 192-196页

作者： Lin Li Tao Li Xia-Mei Tang shu-ming wang Qian-Jin wang Shi-Ning Zhu National Laboratory of Solid State Microstructures School of PhysicsCollege of Engineering and Applied SciencesNanjing UniversityNanjing210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

As one of the recent advances of optics and photonics,plasmonics has enabled unprecedented optical *** a vectorial configuration of surface plasmon field,metallic nanostructures offer efficient solutions in polarization control with a very limited sample *** compact polarization devices have been realized using such metallic ***,in most of these devices,the functions were usually simple and limited to a few polarization ***,we demonstrated a plasmonic polarization generator that can reconfigure an input polarization to all types of polarization states *** plasmonic polarization generator is based on the interference of the in-plane(longitudinal)field of the surface plasmons that gives rise to versatile near-field polarization states on a metal surface,which have seldom been considered in previous *** a well-designed nanohole array,the in-plane field of SPPs with proper polarization states and phases can be selectively scattered out to the desired light beams.A manifestation of eight focusing beams with well-routed polarizations was experimentally *** design offers a new route to achieve the full control of optical polarizations and possibly advance the development in photonic information processing.

关键词： near-field interference phase modulation plasmonics polarization generator

Distribution- and Metabolism-Based Drug Discovery: A Potassium-Competitive Acid Blocker as a Proof of Concept

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Research 2022年第4期2022卷 609-620页

作者： ming-shu wang Yi Gong Lin-Sheng Zhuo Xing-Xing Shi Yan-Guang Tian Chang-Kang Huang Wei Huang Guang-Fu Yang Key Laboratory of Pesticide e Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensor Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China Nanjing shuohui Pharmatechnology Co. Ltd.Nanjing 210046China

Conventional methods of drug design require compromise in the form of side effects to achieve sufficient efficacy because targeting drugs to specific organs remains ***,new strategies to design organ-specific drugs that induce little toxicity are *** on characteristic tissue niche-mediated drug distribution(TNMDD)and patterns of drug metabolism into specific intermediates,we propose a strategy of distribution-and metabolism-based drug design(DMBDD);through a physicochemical property-driven distribution optimization cooperated with a well-designed metabolism pathway,SH-337,a candidate potassium-competitive acid blocker(P-CAB),was ***-337 showed specific distribution in the stomach in the long term and was rapidly cleared from the systemic ***,SH-337 exerted a comparable pharmacological effect but a 3.3-fold higher no observed adverse effect level(NOAEL)compared with FDA-approved *** study contributes a proof-of-concept demonstration of DMBDD and provides a new perspective for the development of highly efficient,organ-specific drugs with low toxicity.

关键词： drugs organs Potassium

Gastrointestinal tract distribution of Salmonella enteritidis in orally in fected mice with a species-specific fluorescent quantitative polymerase chain reaction

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World Journal of Gastroenterology 2007年第48期13卷 6568-6574页

作者： shu-Xuan Deng An-Chun Cheng ming-shu wang Ping Cao Research Center of Poultry Diseases College of Animal Science and Veterinary Medicine Sichuan Agricultural University Yaan 625014 Sichuan Province China Research Center of Poultry Diseases College of Animal Science and Veterinary Medicine Sichuan Agricultural University Key Laboratory of Animal Diseases and Human Health of Sichuan Province Yaan 625014 Sichuan Province. China

AIM: To identify and understand the regular distribution pattern and primary penetration site for Salmonella enteritidis (S. enteritidis) in the gastrointestinal tract. METHODS: Based on the species-specific DNA sequence of S. enteritidis from GenBank, a species-specific real- time, fluorescence-based quantitative polymerase chain reaction (FQ-PCR) was developed for the detection of S. enteritidis. We used this assay to detect genomic DNA of S. enteritidis in the gastrointestinal tract, including duodenum, jejunum, ileum, cecum, colon, rectum, esophagus and stomach, from mice after oral infection. RESULTS: S. enteritidis was consistently detected in all segments of the gastrointestinal tract. The jejunum and ileum were positive at 8 h post inoculation, and the final organ to show a positive result was the stomach at 18 h post inoculation. The copy number of S. enteritidis DNA in each tissue reached a peak at 24-36 h post inoculation, with the jejunum, ileum and cecum containing high concentrations of S. enteritidis, whereas the duodenum, colon, rectum, stomach and esophagus had low concentrations. S. enteritidis began to decrease and vanished at 2 d post inoculation, but it was still present up to 5 d post inoculation in the jejunum, ileum andcecum, without causing apparent symptoms. By 5 d post inoculation, the cecum had significantly higher numbers of S. enteritidis than any of the other areas (P < 0.01), and this appeared to reflect its function as a repository for S. enteritidis. CONCLUSION: The results provided significant data for clarifying the pathogenic mechanism of S. enteritidis in the gastrointestinal tract, and showed that the jejunum, ileum and cecum are the primary sites of invasion in normal mice after oral infection. This study will help to further understanding of the mechanisms of action of S. enteritidis.

关键词： Fluorescence-based quantitative polymerase chain reaction Gastrointestinal tract Salmonella enteritidis

Detection of apoptosis induced by new type gosling viral enteritis virus in vitro through fluorescein annexin V-FITC/PI double labeling

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World Journal of Gastroenterology 2008年第14期14卷 2174-2178页

作者： shun Chen An-Chun Cheng ming-shu wang Xi Peng Avian Diseases Research Centre College of Veterinary Medicine of Sichuan Agricultural University Yaan 625014 Sichuan Province China Avian Diseases Research Centre College of Veterinary Medicine of Sichuan Agricultural University Key Laboratory of Animal Diseases and Human Health of Sichuan Province Yaan 625014 Sichuan Province China College of Life Science and Technology of Southwest University for Nationalities Chengdu 610041 Sichuan Province China

AIM: To achieve a better understanding of the pathogenesis of new type gosling viral enteritis virus (NGVEV) and the relationship between NGVEV and host cells. METHODS: The apoptosis of duck embryo fibroblasts (DEF) induced by NGVEV was investigated by fluorescence-activated cell sorter (FACS) and fluorescence microscope after the cells were stained with Annexin V-FITC and propidium iodide (PI). RESULTS: By staining cells with a combination of fluorescein annexin V-FITC and PI, it is possible to distinguish and quantitatively analyze non-apoptotic cells (Annexin V-FITC negative/PI negative), early apoptotic cells (Annexin V-FITC positive/PI negative), late apoptotic/necrotic cells (Annexin V-FITC positive/ PI positive) and dead cells (Annexin V-FITC negative/PI positive) through flow cytometry and fluorescence microscope. The percentage of apoptotic cells increased with the incubation time and reached a maximum at 120 h after infection, while the percentage of non- apoptotic cells decreased.

关键词： Gosling viral enteritis New type Virus Duck embryo fibroblasts Apoptosis Fluorescein annexin V-FITC/PI

A simple and rapid method for extracting bacterial DNA from intestinal microflora for ERIC-PCR detection

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World Journal of Gastroenterology 2008年第18期14卷 2872-2876页

作者： Jin-Long Yang ming-shu wang An-Chun Cheng Kang-Cheng Pan Chuan-Feng Li shu-Xuan Deng Avian Diseases Research Center College of Veterinary Medicine of Sichuan Agricultural University Yaan 625014 Sichuan Province China Avian Diseases Research Center College of Veterinary Medicine of Sichuan Agricultural University Key Laboratory of Animal Diseases and Human Health of Sichuan Province Yaan 625014 Sichuan Province China College of Life Science and Technology of Southwest University for Nationalities Chengdu 610041 Sichuan Province China

AIM: To develop a simple and convenient method for extracting genomic DNA from intestinal microflora for en- terobacterial repetitive intergenic consensus (ERIC)-PCR detection. METHODS: Five methods of extracting bacterial DNA, including Tris-EDTA buffer, chelex-100, ultrapure water, 2% sodium dodecyl sulfate and 10% Triton-100 with and without sonication, were compared with the commercial fecal DNA extraction kit method, which is considered as the gold standard for DNA extraction. The comparison was based on the yield and purity of DNA and the indexes of the structure and property of micro-organisms that were reflected by ERIC-PCR. RESULTS: The yield and purity of DNA obtained by the chelex method was similar to that obtained with the fecal DNA kit. The ERIC-PCR results obtained for the DNA extracted by the chelex method and those obtained for DNA extracted with the fecal DNA kit were basically the ***: The chelex method is recommended for ERIC-PCR experiments in view of its simplicity and cost- effectiveness; and it is suitable for extracting total DNA from intestinal micro-organisms, particularly for handling a large number of samples.

关键词： DNA extraction Intestinal microflora

Quantitative studies of the regular distribution pattern for Salmonella enteritidis in the internal organs of mice after oral challenge by a specific real-time polymerase chain reaction

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World Journal of Gastroenterology 2008年第5期14卷 782-789页

作者： shu-Xuan Deng An-Chun Cheng ming-shu wang Ping Cao Bin Yan Nian-Chun Yin Sheng-Yan Cao Zhen-Hua Zhang Avian Diseases Research Center College of Veterinary Medicine of Sichuan Agricultural University Yaan 625014 Sichuan Province China Avian Diseases Research Center College of Veterinary Medicine of Sichuan Agricultural University Key Laboratory of Animal Diseases and Human Health of Sichuan Province Yaan 625014 Sichuan Province China College of Life Science and Technology of Southwest University for Nationalities Chengdu 610041 Sichuan Province China

AIM： To identify and understand the regular distribution pattern for Salmonella enteritidis （S. enteritidis） in the internal organs of mice after an oral challenge over a 3 wk period. METHODS： Assays based on the serovar-specific DNA sequence of S. enteritidis from GenBank, and a serovar-specific real-time, fluorescence-based quantitative polymerase chain reaction （FQ-PCR） were developed for the detection of S. enteritidis. We used this assay to detect genomic DNA of S. enteritidis in the blood and the internal organs, including heart, liver, spleen, kidney, pancreas, and gallbladder, from mice after oral challenge at different time points respectively.RESULTS： The results showed that the spleen was positive at 12 h post inoculation （PI）, and the blood was at 14 h PI. The organism was detected in the liver and heart at 16 h PI, the pancreas was positive at 20 h PI, and the final organs to show positive results were the kidney and gallbladder at 22 h PI. The copy number of S. enteritidis DNA in each tissue reached a peak at 24-36 h PI, with the liver and spleen containing high concentrations of S. enteritidis, whereas the blood, heart, kidney, pancreas, and gallbladder had low concentrations. S. enteritidis populations began to decrease and were not detectable at 3 d PI, but were still present up to 12 d PI in the gallbladder, 2 wk for the liver, and 3 wk for the spleen without causing apparent symptoms.CONCLUSION： The results provided significant data for understanding the life cycle of S. enteritidis in the internal organs, and showed that the liver and spleen may be the primary sites for setting itself up as a commensa over a long time after oral challenge. Interestingly, it may be the first time reported that the gallbladder is a site of carriage for S. enteritidis over a 12 d period. This study will help to understand the mechanisms of action of S. enteriCdis infection in vivo.

关键词： Fluorescence-based quantitative polymerase chain reaction Internal organs Salmonella enteritidis Regular distribution pattern

Application of an indirect immunofluorescent staining method for detection of Salmonella enteritidis in paraffin slices and antigen location in infected duck tissues

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World Journal of Gastroenterology 2008年第5期14卷 776-781页

作者： Bin Yan An-Chun Cheng ming-shu wang shu-Xuan Deng Zhen-Hua Zhang Nian-Chun Yin Ping Cao Sheng-Yan Cao Avian Disease Research Center Collage of Veterinary Medicine of Sichuan Agriculture University Yaan 625014 Sichuan Province China College of Life Science and Technology of Southwest University for Nationalities Chengdu 610041 Sichuan Province China Key Laboratory of Animal Disease and Human Health of Sichuan Province College of Veterinary Medicine of Sichuan Agriculture University Yaan 625014 Sichuan Province China

AIM： To detect Salmonella enteritidis （S. enteritidis） in paraffin slices and antigen location in infected duck tissues. METHODS： The rabbits were immunized with purified bacillus to obtain S. enteritidis-specific antibody, which were then extracted by the caprylic-ammonium sulphate method, purified through High-Q columns. An indirect immuno-fluorescent staining method （IFA） was established to detect the S. enteritidis antigen in paraffin slices. Detected S. enteritidis in each organ tissue of ducklings experimentally infected with S. enteritidis. RESULTS： The gland of Garder, heart, kidney, spleen, liver, brain, ileum, jejunum, bursa of Fabricius from S. enteritidis experimentally infected ducklings were positive or strongly positive, and the S. enteritidis antigen mainly distributed in the infected cell cytoplasm.CONCLUSION： IFA is an intuitionist, sensitive and specific method in detecting S. enteritidis antigen in paraffin wax slices, and it is a good method in diagnosis and antigen location of S. enteritidis. We also conclude that the gland of Garder, heart, kidney, spleen, liver, ileum, jejunum are target organs in S. enteritidis infections of duck, and S. enteritidis is an intracellular parasitic bacterium.

关键词： Indirect immuno-fluorescent antibody staining Salrnonella enteritidis Paraffin tissues Detection Localization of antigens

Pathogenic and pathological characteristic of new type gosling viral enteritis first observed in China

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World Journal of Gastroenterology 2001年第5期7卷 678-684页

作者： An-Chun Cheng ming-shu wang Xiao-Yue Chen Yu-Fei Guo Zhao-Yu Liu Peng-Fei Fang College of Animal Science and Veterinary Medicine,Sichuan Agricultural University,Xinkang Road,Yaan City 625014,Sichuan Province,China College of Animal Science and Veterinary Medicine Sichuan Agricultural University Yaan 625014 Sichuan Province China. Chenganchun@***

AIM: To study the purifying method and characteristics of new gosling viral enteritis virus (NGVEV),the etiological agent of new gosling viral enteritis (NGVE) which was first recognized in China, as well as the pathomorphological development in goslings infected artificially with NGVEV. METHODS: (1)NGVEV virions were purified by the procedure of treatment with chloroform and ammonium sulfate precipitation, dialysis to remove the sulfate radical and ammonium ion and separation by gel filtration chromatography, and SDS-PAGE. (2)Forty-2-day-old White Sichuan goslings were orally administered with NGVEV and 24 hr later 2 birds were randomly selected and killed at 24hr intervals until death occurred. Specimens(duodenum, ileum, liver, heart, kidney, spleen, lung, proventriculus, pancreas, esophagus, and the intestinal embolus) were taken until all birds in this group died and were sectioned and stained with hemotoxylin and eosin and studied by light microscope. RESULTS: NGVEV shared the typical characteristics of Adenovirus and which structural proteins consisted of 15 polypeptides. Necrosis and sloughing of the epithelial cells covering the villus tips of the duodenum were first observed in goslings 2 days postinfection artificially with NGVEV. With the progress of infection, this lesion rapidly occurred in the epithelium at the base of the villus and with infiltration of the inflammatory cells, the jejunum tended to be involved. With the intensification of mucosa necrosis and inflammatory exudation of the small intestine, fibrinonecrotic enteritis was further developed and embolus composed of either intestinal contents wrapped by pseudo-membrane or of the mixture of fibrous exudate and necrotic intestinal mucosa were observed in the middle-lower part of the small intestine. This structure occluded the intestinal tract and made the intestine dilated in appearance. The intestinal glandular cells underwent degeneration, necrosis and might be found sloughed into the lumen.

关键词： Adenoviridae Animals Brain China DNA, Viral Enteritis Female Geese Inclusion Bodies, Viral Poultry Diseases Research Support, Non-U.S. Gov't Virulence Viscera