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https://www.readbyqxmd.com/read/28340456/macroscopic-and-microscopic-investigation-of-adsorption-and-precipitation-of-zn-on-%C3%AE-alumina-in-the-absence-and-presence-of-as
#1
Yu-Jun Wang, Ting-Ting Fan, Cun Liu, Wei Li, Meng-Qiang Zhu, Jian-Xin Fan, Hua Gong, Dong-Mei Zhou, Donald L Sparks
Contaminants zinc (Zn) and arsenate (As) often coexist in soils. However, little is known concerning the impacts of coexisting As on Zn adsorption and precipitation on soil minerals. In the present study, adsorption and precipitation of Zn on γ-alumina in the absence and presence of arsenate was investigated employing batch experiments and Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy. Results indicated that Zn formed edge-sharing tetrahedral surface complexes at pH 5.5 and Zn-Al LDH-like (layered double hydroxide) precipitates at pH 7...
March 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28339020/metformin-inhibits-endothelial-progenitor-cell-migration-by-decreasing-matrix-metalloproteinases-mmp-2-and-mmp-9-via-the-ampk-mtor-autophagy-pathway
#2
Wen-Dong Li, Neng-Ping Li, Dan-Dan Song, Jian-Jie Rong, Ai-Min Qian, Xiao-Qiang Li
The aim of the present study was to investigate the effect of metformin on endothelial progenitor cell (EPC) migration and to explore the possible mechanisms. EPCs were treated with metformin, and the migration of EPCs was evaluated by wound healing and Matrigel invasion assays. We also examined the expression levels of of MMP-2 and MMP-9 in EPCs with or without metformin treatment via RT-PCR and western blot analysis, and activities of MMP-2 and MMP-9 in EPCs under different conditions was examined by zymography...
March 21, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28338806/influenza-associated-hospitalizations-for-cardiovascular-diseases-in-the-tropics
#3
Li Wei Ang, Jonathan Yap, Vernon Lee, Wei Qiang Chng, Fazlur Rehman Jaufeerally, Carolyn Su Ping Lam, Jeffery Cutter, Khung Keong Yeo, Stefan Ma
Influenza is a major cause of mortality and morbidity. We aimed to examine the influenza-associated hospitalization rates and proportions for cardiovascular disease (CVD) in tropical Singapore. Hospital admissions for ischemic heart disease (IHD), congestive heart failure (CHF), and overall CVD were obtained from the national inpatient database for the period of 2010-2014. We used, as the key indicator of influenza virus activity, the overall proportion of specimens from outpatients with influenza-like illness in the community that tested positive for influenza as part of the national influenza surveillance program...
February 25, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28337987/high-performance-and-compact-designed-flexible-thermoelectric-modules-enabled-by-a-reticulate-carbon-nanotube-architecture
#4
Wenbin Zhou, Qingxia Fan, Qiang Zhang, Le Cai, Kewei Li, Xiaogang Gu, Feng Yang, Nan Zhang, Yanchun Wang, Huaping Liu, Weiya Zhou, Sishen Xie
It is a great challenge to substantially improve the practical performance of flexible thermoelectric modules due to the absence of air-stable n-type thermoelectric materials with high-power factor. Here an excellent flexible n-type thermoelectric film is developed, which can be conveniently and rapidly prepared based on the as-grown carbon nanotube continuous networks with high conductivity. The optimum n-type film exhibits ultrahigh power factor of ∼1,500 μW m(-1) K(-2) and outstanding stability in air without encapsulation...
March 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/28336972/microsatellite-analysis-for-differentiating-the-origin-of-renal-angiomyolipoma-and-involved-regional-lymph-node
#5
Ping Tan, Huan Xu, Yong Jiang, Lu Yang, Yan Zou, Liangren Liu, Nian Liu, Dehong Cao, Yu Fan, Qiyuan Li, Qiang Wei
Renal angiomyolipoma (AML) with the regional lymph node (LN) involved leads to a question of metastasis versus multicentric origin when their histology are similar. As the genomic instability is a common feature of cancer, we hypothesized that independently arising neoplasms in an individual patient would exhibit measurable genomic variation, facilitating the discrimination of tumor lineage and relatedness. Our study enrolled 12 patients who were diagnosed with nodal-involved renal AML at West China Hospital...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336951/determination-of-leaf-carbon-isotope-discrimination-in-c4-plants-under-variable-n-and-water-supply
#6
Hao Yang, Qiang Yu, Wen-Ping Sheng, Sheng-Gong Li, Jing Tian
Understanding the mechanisms underlying variations in carbon isotope discrimination (Δ) in C4 plants is critical for predicting the C3/C4 ratio in C3/C4 mixed grassland. The value of Δ is determined by bundle sheath leakiness (Ф) and the ratio of intercellular to ambient CO2 concentration (C i /C a ). Leaf nitrogen concentration (N leaf ) is considered a driver of Δ in C4 plants. However, little is known about how N leaf affects Ф and C i /C a , and subsequently Δ. Here leaf carbon isotope composition, N leaf , Ф, and leaf gas exchange were measured in Cleistogenes squarrosa, a dominant C4 species in the Inner Mongolia grassland...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336464/new-insights-into-the-codon-usage-patterns-of-the-bactericidal-permeability-increasing-bpi-gene-across-nine-species
#7
Wei-Yun Qin, Li-Na Gan, Ri-Wei Xia, Shou-Yong Sun, Guo-Qiang Zhu, Sheng-Long Wu, Wen-Bin Bao
Bactericidal/permeability-increasing (BPI) protein is a member of a new generation of proteins known as super-antibiotics that are implicated as endotoxin neutralising agents. Non-uniform usage of synonymous codons for a specific amino acid during translation of a protein is known as codon usage bias (CUB). Analysis of CUB and compositional dynamics of coding sequences could contribute to a better understanding of the molecular mechanism and the evolution of a particular gene. In this study, we performed CUB analysis of the complete coding sequences of the BPI gene from nine different species...
March 20, 2017: Gene
https://www.readbyqxmd.com/read/28334806/prognostic-value-of-eus-combined-with-msct-in-predicting-the-recurrence-and-metastasis-of-patients-with-gastric-cancer
#8
Jun-Hua Li, Wei-Zhong Shen, Xiao-Qing Gu, Wei-Kang Hong, Zhi-Qiang Wang
Objective: This study aims to explore the prognostic value of endoscopic ultrasonography combined with multi-slice spiral computed tomography in predicting the recurrence and metastasis of gastric cancer, as well as investigate the correlation of fragile histidine triad protein expression with the tumor-node-metastasis stage of gastric cancer patients. Methods: A total of 81 gastric cancer patients were selected in our study. All patients were examined by endoscopic ultrasonography and multi-slice spiral computed tomography before operation, and gastric cancer tissues and adjacent normal tissues were obtained after operation...
March 10, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28333978/association-between-genotype-and-drug-resistance-profiles-of-mycobacterium-tuberculosis-strains-circulating-in-china-in-a-national-drug-resistance-survey
#9
Yang Zhou, Susan van den Hof, Shengfen Wang, Yu Pang, Bing Zhao, Hui Xia, Richard Anthony, Xichao Ou, Qiang Li, Yang Zheng, Yuanyuan Song, Yanlin Zhao, Dick van Soolingen
We describe the population structure of a representative collection of 3,133 Mycobacterium tuberculosis isolates, collected within the framework of a national resistance survey from 2007 in China. Genotyping data indicate that the epidemic strains in China can be divided into seven major complexes, of which 92% belonged to the East Asian (mainly Beijing strains) or the Euro-American lineage. The epidemic Beijing strains in China are closely related to the Beijing B0/W148 strain earlier described in Russia and a large cluster of these strains has spread national wide...
2017: PloS One
https://www.readbyqxmd.com/read/28333440/high-packing-density-unidirectional-arrays-of-vertically-aligned-graphene-with-enhanced-areal-capacitance-for-high-power-micro-supercapacitors
#10
Shuanghao Zheng, Zhilin Li, Zhong-Shuai Wu, Yanfeng Dong, Feng Zhou, Sen Wang, Qiang Fu, Chenglin Sun, Liwei Guo, Xinhe Bao
Interfacial integration of the shape-engineered electrode with strongly bonded current collector is the key for minimizing both ionic and electronic resistance, and then developing high-power supercapacitors. Herein, we demonstrated the construction of high-power micro-supercapacitors (VG-MSCs) based on high-density unidirectional arrays of vertically aligned graphene (VG) nanosheets, derived from thermally decomposed SiC substrate. The as-grown VG arrays showed a standing basal plane orientation grown on (0001(-)) SiC substrate, tailored thickness (3...
March 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28332768/separation-of-caffeoylquinic-acids-and-flavonoids-from-asteris-souliei-by-high-performance-counter-current-chromatography-and-their-anti-inflammatory-activity-in-vitro
#11
Qiang Zhang, He-Ying Pei, Kai Chen, Huan Tang, Bo Wu, Ming-Hai Tang, Ai-Hua Peng, Hao-Yu Ye, Li-Juan Chen
Eleven compounds were successfully separated from Asteris souliei by using a two-step high-performance counter-current chromatography method. The first step involved a reversed phase isocratic counter-current chromatography separation using hexane/ethyl acetate/methanol/water (1:0.8:1:1 v/v), which produced three fractions, the first two of which were mixtures. The second step used step-gradient reversed-phase counter-current chromatography with hexane/butanol/ethyl acetate/methanol/water (1:0.5:3.5:1:4 v/v) initially followed by hexane/ethyl acetate/methanol/water (1:2:1:2 v/v) to separate Fraction 1 into seven compounds; and hexane/ethyl acetate/methanol/water (1:1:1:1...
March 23, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28332678/tandem-sn2-nucleophilic-substitution-oxidative-radical-cyclization-of-aryl-substituted-allylic-alcohols-with-1-3-dicarbonyl-compounds
#12
Zhen Zhang, Cheng Li, Shao-Hua Wang, Fu-Min Zhang, Xue Han, Yong-Qiang Tu, Xiao-Ming Zhang
A novel and efficient tandem SN2' nucleophilic substitution/oxidative radical cyclization reaction of aryl substituted allylic alcohols with 1,3-dicarbonyl compounds has been developed by using Mn(OAc)3 as an oxidant, which enables the expeditious synthesis of polysubstituted dihydrofuran (DHF) derivatives in moderate to high yields. The use of weakly acidic hexafluoroisopropanol (HFIP) as the solvent rather than AcOH has successfully improved the yields and expanded the substrate scope of this type of radical cyclization reactions...
March 23, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28332421/dietary-exposure-to-aluminum-in-the-popular-chinese-fried-bread-youtiao
#13
Ge Li, Xue Zhao, Shimin Wu, Hongying Hua, Qiang Wang, Zhiheng Zhang
Youtiao is a typical, traditional, and widely consumed fried food in China. Fermentation of Youtiao involves the use of aluminium potassium sulphate (alum). There are health concerns related to the levels of aluminium in food; therefore, we aimed to determine the aluminium concentrations of Youtiao from various locations, and estimate the dietary exposure by different age groups in Southern and Northern China. The aluminium content of Youtiao samples varied considerably (range: 4.46 to 852.69 mg.kg(-1)). Both the mean and median aluminium contents of Youtiao exceeded 100 mg...
March 23, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28331792/advanced-micro-nanostructures-for-lithium-metal-anodes
#14
REVIEW
Rui Zhang, Nian-Wu Li, Xin-Bing Cheng, Ya-Xia Yin, Qiang Zhang, Yu-Guo Guo
Owning to their very high theoretical capacity, lithium metal anodes are expected to fuel the extensive practical applications in portable electronics and electric vehicles. However, unstable solid electrolyte interphase and lithium dendrite growth during lithium plating/stripping induce poor safety, low Coulombic efficiency, and short span life of lithium metal batteries. Lately, varies of micro/nanostructured lithium metal anodes are proposed to address these issues in lithium metal batteries. With the unique surface, pore, and connecting structures of different nanomaterials, lithium plating/stripping processes have been regulated...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331357/effectiveness-of-ultrasound-therapy-for-myofascial-pain-syndrome-a-systematic-review-and-meta-analysis
#15
REVIEW
Peng Xia, Xiaoju Wang, Qiang Lin, Kai Cheng, Xueping Li
OBJECTIVE: The objective of this review was to assess the therapeutic effect of ultrasound (US) on myofascial pain syndrome (MPS). DATE SOURCES: PubMed, Embase, and Cochrane Library were searched to find relevant studies from January 1966 to May 2016 using keywords. Four investigators performed the data extraction. STUDY SELECTION: Randomized controlled trials (RCTs) investigating the outcomes of pain and physical function between MPS patients receiving and not receiving US were selected by two researchers independently...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28329733/comparison-of-transcriptional-expression-patterns-of-carotenoid-metabolism-in-cabernet-sauvignon-grapes-from-two-regions-with-distinct-climate
#16
Wei-Kai Chen, Ke-Ji Yu, Bin Liu, Yi-Bin Lan, Run-Ze Sun, Qiang Li, Fei He, Qiu-Hong Pan, Chang-Qing Duan, Jun Wang
The downstream flux of carotenoid metabolism in grape berries includes the biosynthesis of norisoprenoids, a group of important aroma compounds, and the production of ABA, a well-known plant hormone. This study focused on the transcriptional profiling comparison of genes participating in the biosynthesis of carotenoids, norisoprenoids, and ABA in Vitis vinifera 'Cabernet Sauvignon' grapes at pea size, veraison, and ripening stages. The grapes were obtained from Changli (CL, eastern China) and Gaotai (GT, western China) regions and analyzed using RNA-sequencing technology...
March 9, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28328835/poor-response-of-initial-steroid-therapy-for-igg4-related-sclerosing-cholangitis-with-multiple-organs-affected
#17
Wei Liu, Weijie Chen, Xiaodong He, Qiang Qu, Tao Hong, Binglu Li
IgG4-related sclerosing cholangitis (IgG4-SC) is a rare biliary manifestation in which many other organs might be affected. The purpose of our study was to investigate the different clinical characteristics and initial steroid response between IgG4-SC patients with and without other organs affected.A series of patients with IgG4-SC in the period from January 2006 to December 2015 at our hospital were included. The pancreas and major salivary glands were screened, and the initial corticosteroid therapy was given...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28328813/evaluation-of-apri-and-fib-4-for-noninvasive-assessment-of-significant-fibrosis-and-cirrhosis-in-hbeag-negative-chb-patients-with-alt%C3%A2-%C3%A2-%C3%A2-2-uln-a-retrospective-cohort-study
#18
Qiang Li, Xiaojing Ren, Chuan Lu, Weixia Li, Yuxian Huang, Liang Chen
To evaluate the performance of aspartate transaminase-to-platelet ratio index (APRI) and fibrosis index based on four factors (FIB-4) to predict significant fibrosis and cirrhosis in hepatitis B virus e antigen (HBeAg)-negative chronic hepatitis B (CHB) patients with alanine transaminase (ALT) ≤ twice the upper limit of normal (2 ULN).Histologic and laboratory data of 236 HBeAg-negative CHB patients with ALT ≤ 2 ULN were analyzed. Predicted fibrosis stage, based on established scales and cut-offs for APRI and FIB-4, was compared with METAVIR scores obtained from liver biopsy...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28328801/influence-of-polymorphisms-in-the-wnt-%C3%AE-catenin-pathway-genes-on-hepatocellular-carcinoma-risk-in-a-chinese-han-population
#19
Qing-Min Li, Feng-Qin Zhang, Ya-Feng Li, Qing-Jie Xian, Yan-Qiang Zhang, Peng Li
The Wnt/β-catenin pathway plays a vital role in initiating and sustaining hepatocellular carcinoma (HCC). However, few studies have investigated polymorphisms in the Wnt/β-catenin signaling pathway genes in the Chinese Han population. The aim of the present retrospective study was to investigate the correlations between polymorphisms of the Wnt/β-catenin signaling pathway genes (CTNNB1 and WNT2) and HCC susceptibility, development, and progression.Twenty tagging single nucleotide polymorphisms were chosen from HapMap data and genotyped in 320 patients with HCC, 320 chronic hepatitis B virus (HBV)-infected patients without HCC (N-HCC, including 95 liver cirrhosis, 164 chronic hepatitis B, and 61 asymptomatic HBV carriers), and 320 healthy controls...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28328107/chiral-exploration-of-6-12-diphenyldibenzo-b-f-1-5-diazocine-with-stable-conformation
#20
Zheng-Yi Li, Yong Pan, Lin-Lin Jin, Yue Yin, Bao-Zhu Yang, Xiao-Qiang Sun
A first optical resolution of 6,12-diphenyldibenzo[b,f][1,5]diazocine with stable boat conformation was achieved by chiral supercritical fluid chromatography (SFC). The absolute configurations of enantiomers were first assigned and determined by X-ray crystal structure based on CIP-rules. The high optical rotation and circular dichroism spectrum were well explained by electronic helix theory. Owing to the high stabilization of boat conformation, the chiral configuration could be maintained at very high temperature, more than 200 °C, which was proved by Density Functional Theory calculations...
March 22, 2017: Chirality
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