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Now showing items 65 - 80 of 446

Identification and Characterization of New Resistance-Conferring SGI1s (Salmonella Genomic Island 1) in Proteus mirabilis

Bie, Luyao Fang, Meng Li, Zhiqiang Wang, Mingyu Xu, Hai

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Automation of the bao steel works hot strip mill : D. Lindhoff, Xu Hai Hong, Wang Wen Rui, Zhang Jian Ping, pp 133–139

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The DENSE AND ERECT PANICLE 1 (DEP1) gene offering the potential in the breeding of high-yielding rice

Xu, Hai Zhao, Minghui Zhang, Qun Xu, Zhengjin Xu, Quan

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A novel FC17/CESA4 mutation causes increased biomass saccharification and lodging resistance by remodeling cell wall in rice

Li, Fengcheng Liu, Sitong Xu, Hai Xu, Quan

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Class 1 and class 2 integrons in multidrug-resistant gram-negative bacteria isolated from the Salmon River, British Columbia

Xu, Hai Broersma, Klaas Miao, Vivian Davies, Julian

Using an enrichment protocol, we isolated 16 gram-negative, multidrug-resistant strains of known or opportunistic bacterial pathogens from the Salmon River in south-central British Columbia from 2005 to 2009, and investigated the genetic basis of their resistance to a variety of antibiotics. Of the 16 strains, 13 carried class 1 integrons and three carried class 2 integrons. Genes found in cassettes associated with the integrons included those for dihydrofolate reductases (dfrA1, dfrA12, dfrA17, and dfrB7), aminoglycoside adenyltransferases (aadA1, aadA2, aadA5, and aadB), streptothricin acetyltransferase (sat), and hypothetical proteins (orfF and orfC). A new gene cassette of unknown function, orf1, was discovered between dfrA1 and aadA5 in Escherichia sp. Other genes for resistance to tetracycline, chloramphenicol, streptomycin, and kanamycin (tetA, tetB, tetD; catA; strA-strB; and aphA1-Iab, respectively) were outside the integrons. Several of these resistance determinants were transferable by conjugation. The detection of organisms and resistance determinants normally associated with clinical settings attest to their widespread dispersal and suggest that regular monitoring of their presence in aquatic habitats should become a part of the overall effort to understand the epidemiology of antibiotic resistance genes in bacteria.

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Genetic enhancement of lodging resistance in rice due to the key cell wall polymer lignin, which affects stem characteristics

Liu, Sitong Huang, Yuwei Xu, Hai Zhao, Minghui Xu, Quan Li, Fengcheng

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Enzyme-Triggered Morphological Transition of Peptide Nanostructures for Tumor-Targeted Drug Delivery and Enhanced Cancer Therapy

Cao, Meiwen Lu, Sha Wang, Ningning Xu, Hai Cox, Henry Li, Ruiheng Waigh, Thomas A. Han, Yuchun Wang, Yilin Lu, Jian R.

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Inhibition of cytosolic phospholipase A2 alpha increases chemosensitivity in cervical carcinoma through suppressing β-catenin signaling

Xu, Hai Sun, Yuan Zeng, Lan Li, Ying Hu, Shan He, Shuping Chen, Haixia Zou, Qing Luo, Baoping

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Oxidative stress and immune related gene expression following exposure to di-n-butyl phthalate and diethyl phthalate in zebrafish embryos

Xu, Hai Shao, Xiaoling Zhang, Zhen Zou, Yanmin Wu, Xiangyang Yang, Liuqing

In the present study, we analyzed the oxidative stress related indices and immune related gene expression of zebrafish embryos after a short-term exposure to various concentrations of di-n-butyl phthalate (DBP), diethyl phthalate (DEP) and their mixture (DBP-DEP) from 4 h post-fertilization (hpf) to 96 hpf. Exposure to the chemicals was found to enhance the production of reactive oxygen species (ROS) and lipid peroxidation (LPO) in a concentration-dependent manner. Simultaneously, adaptive responses to DBP/DEP-induced oxidative stress were observed. The activity of antioxidant enzymes including superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) were all increased in a concentration-dependent manner. The transcription of innate immune related genes including interferon gamma (IFN gamma), interleukin-1 beta (1L1 beta), Myxovirus resistance (Mx), tumor necrosis factor a (TNF alpha), CC-chemokine, CXCL-clc, lysozyme (Lyz) and complement factor C3B (C3) were up-regulated upon DBP, DEP and their mixture exposure, suggesting the induction of immune response. In addition, co-exposure to DBP-DEP also induced antioxidant defense and immune response in zebrafish embryo. The results demonstrat that DBP/DEP exposure could induce the antioxidant and immune responses in zebrafish embryos. (C) 2013 Elsevier Inc. All rights reserved.

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Twisted Nanotubes Formed from Ultrashort Amphiphilic Peptide I₃K and Their Templating for the Fabrication of Silica Nanotubes

Xu, Hai Wang, Yuming Ge, Xin Han, Shuyi Wang, Shengjie Zhou, Peng Shan, Honghong Zhao, Xiubo Lu, Jian R.

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Characterization of Petroporphyrins Using Ultraviolet?Visible Spectroscopy and Laser Desorption Ionization Time-of-Flight Mass Spectrometry

Xu, Hai Que, Guohe Yu, Daoyong Lu, Jian R.

Petroporphyrins were extracted from two typical Chinese heavy crude oils, Tahe and Du84, and then purified by silica gel chromatography, followed by demetallization by methyl sulfonic acid. The extraction and purification were monitored using ultraviolet-visible spectroscopy, and the final petroporphyrins were analyzed using laser desorption ionization time-of-flight mass spectrometry. The soft ionization mass spectrometric technique proved to be effective for the characterization of petroporphyrins. The results show that, in Tahe crude oil, vanadium is more abundant than nickel and 75% of the vanadyl porphyrins are of the etioporphyrin (ETIO) type, with remaining fractions attributed to deoxophylloerythroetioporphyrin (DPEP) and benzo types. The Sigma DPEP/Sigma ETIO ratio was found to be 0.18. In contrast, the Du84 heavy crude oil contains more abundant nickel than vanadium, with its nickel porphyrins comprising mainly DPEP and ETIO types, with each occupying 45%, and the tetrahydrobenzo-DPEP and benzo types attributed to the remaining 10%. The Sigma DPEP/Sigma ETIO ratio is similar to 1.1. These results suggest that the Tahe crude oil has higher thermal maturity than the Du84 crude oil, and the former is in its mature stage, whereas the latter is in its evolution stage.

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Ruihua Zhang,\r Sadness Expressions in English and Chinese: Corpus Linguistic Contrastive Semantic Analysis\r .

XU, Hai Chen, Ziyue

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The occurrence, potential toxicity, and toxicity mechanism of bisphenol S, a substitute of bisphenol A: A critical review of recent progress

Qiu, Wenhui Zhan, Hongyan Hu, Jiaqi Zhang, Ting Xu, Hai Wong, Minghung Xu, Bentuo Zheng, Chunmiao

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Interaction of different oligomeric states of hexameric DNA-helicase RepA with single-stranded DNA studied by analytical ultracentrifugation

Xu, Hai Frank, Joachim Holzwarth, Josef F. Saenger, Wolfram Behlke, Joachim

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Effect of Surface Packing Density of Interfacially Adsorbed Monoclonal Antibody on the Binding of Hormonal Antigen Human Chorionic Gonadotrophin

Xu, Hai Lu, Jian R. Williams, David E.

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Data on response of in situ algal phytoplankton assemblages to micronutrient treatment in small-scale mesocosms for a large hypereutrophic lake

Zhang, Xiaokai Li, Boling Xu, Hai Wells, Mona Tefsen, Boris Qin, Boqiang

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Identification and Characterization of New Resistance-Conferring SGI1s (Salmonella Genomic Island 1) in Proteus mirabilis

Automation of the bao steel works hot strip mill : D. Lindhoff, Xu Hai Hong, Wang Wen Rui, Zhang Jian Ping, pp 133–139

The DENSE AND ERECT PANICLE 1 (DEP1) gene offering the potential in the breeding of high-yielding rice

A novel FC17/CESA4 mutation causes increased biomass saccharification and lodging resistance by remodeling cell wall in rice

Class 1 and class 2 integrons in multidrug-resistant gram-negative bacteria isolated from the Salmon River, British Columbia

Genetic enhancement of lodging resistance in rice due to the key cell wall polymer lignin, which affects stem characteristics

Enzyme-Triggered Morphological Transition of Peptide Nanostructures for Tumor-Targeted Drug Delivery and Enhanced Cancer Therapy

Inhibition of cytosolic phospholipase A2 alpha increases chemosensitivity in cervical carcinoma through suppressing β-catenin signaling

Oxidative stress and immune related gene expression following exposure to di-n-butyl phthalate and diethyl phthalate in zebrafish embryos

Twisted Nanotubes Formed from Ultrashort Amphiphilic Peptide I₃K and Their Templating for the Fabrication of Silica Nanotubes

Characterization of Petroporphyrins Using Ultraviolet?Visible Spectroscopy and Laser Desorption Ionization Time-of-Flight Mass Spectrometry

Ruihua Zhang,\r Sadness Expressions in English and Chinese: Corpus Linguistic Contrastive Semantic Analysis\r .

The occurrence, potential toxicity, and toxicity mechanism of bisphenol S, a substitute of bisphenol A: A critical review of recent progress

Interaction of different oligomeric states of hexameric DNA-helicase RepA with single-stranded DNA studied by analytical ultracentrifugation

Effect of Surface Packing Density of Interfacially Adsorbed Monoclonal Antibody on the Binding of Hormonal Antigen Human Chorionic Gonadotrophin

Data on response of in situ algal phytoplankton assemblages to micronutrient treatment in small-scale mesocosms for a large hypereutrophic lake

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