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https://www.readbyqxmd.com/read/29768671/utilizing-two-detectors-in-the-measurement-of-trichloroacetic-acid-in-human-urine-by-reaction-headspace-gas-chromatography
#1
Wei-Qi Xie, Yi-Xian Gong, Kong-Xian Yu
A reaction headspace gas chromatography (HS-GC) technique was investigated for quantitatively analyzing trichloroacetic acid in human urine. This method is on the basis of the decomposition reaction of trichloroacetic acid under high temperature conditions. The carbon dioxide and chloroform formed from the decomposition reaction can be respectively detected by the thermal conductivity detector HS-GC and the flame ionization detector HS-GC. The data showed that the reaction can be completed in 60 min at 90 o C...
May 16, 2018: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29739936/supramolecular-kandinsky-circles-with-high-antibacterial-activity
#2
Heng Wang, Xiaomin Qian, Kun Wang, Ma Su, Wei-Wei Haoyang, Xin Jiang, Robert Brzozowski, Ming Wang, Xiang Gao, Yiming Li, Bingqian Xu, Prahathees Eswara, Xin-Qi Hao, Weitao Gong, Jun-Li Hou, Jianfeng Cai, Xiaopeng Li
Nested concentric structures widely exist in nature and designed systems with circles, polygons, polyhedra, and spheres sharing the same center or axis. It still remains challenging to construct discrete nested architecture at (supra)molecular level. Herein, three generations (G2-G4) of giant nested supramolecules, or Kandinsky circles, have been designed and assembled with molecular weight 17,964, 27,713 and 38,352 Da, respectively. In the ligand preparation, consecutive condensation between precursors with primary amines and pyrylium salts is applied to modularize the synthesis...
May 8, 2018: Nature Communications
https://www.readbyqxmd.com/read/29603240/a-novel-superchilling-storage-ice-glazing-ss-ig-approach-using-biopolymer-based-composite-hydrogel-to-delay-microbiological-spoilage-and-organic-oxidation-of-preserved-tilapia
#3
Qi He, Bin Gong, Jiapeng He, Xiaocui Yang, Kaijun Xiao, Liang Zhu
BACKGROUND: Most of aquatic products are highly susceptible to deterioration and microbial spoilage during storage. A frequently used method to preserve them is achieved by cold storage. However, products preserved by traditional frozen method are prone to suffer undesired frozen damage. It will significantly impair postmortem quality of the products. To solve the problem, this work established a novel superchilling storage-ice glazing (SS-IG) approach using chitosan-catechin composite material...
March 30, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29558395/yak-igf2-promotes-fibroblast-proliferation-via-suppression-of-igf1r-and-pi3kcg-expression
#4
Quanwei Zhang, Qi Wang, Jishang Gong, Jiaxing Du, Yong Zhang, Xingxu Zhao
Insulin-like growth factor 2 (IGF2) recapitulates many of the activities of insulin and promotes differentiation of myoblasts and osteoblasts, which likely contribute to genetic variations of growth potential. However, little is known about the functions and signaling properties of IGF2 variants in yaks. The over-expression vector and knockdown sequence of yak IGF2 were transfected into yak fibroblasts, and the effects were detected by a series of assays. IGF2 expression in yak muscle tissues was significantly lower than that of other tissues...
March 20, 2018: Genes
https://www.readbyqxmd.com/read/29552299/tulobuterol-patch-alleviates-allergic-asthmic-inflammation-by-blockade-of-syk-and-nf-%C3%AE%C2%BAb-activation-in-mice
#5
Lixia Fu, Jing Guan, Yujia Zhang, Pei Ma, Yuanyuan Zhuang, Jinye Bai, Yasi Ding, Qi Hou, Wan Gong, Mingbao Lin, Wensheng Zheng, Jianmin Zhang
Background: Tulobuterol patch, one of strongest bronchodilators, was recently shown to improve bronchial hyperresponsiveness and significantly decrease the sputum eosinophil counts by combining with nonspecific anti-inflammatory drugs on patients with asthma. However, there is limited study on the anti-inflammatory activities of tulobuterol patch and its potential machenism. Results: The tulobuterol patch significantly ameliorated inflammatory cell infiltration in the lung tissue, reduced the number of total leukocytes and its differential count, markedly reduced the production of IL-1β, TNF-α, IL-6, CCL-11 and IL-4 in bronchial alveolar lavage fluid, as well as a reduction in IL-4/IFN-γ ratio...
February 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29498537/complementary-and-alternative-medicine-usage-by-multiple-sclerosis-patients-results-from-a-prospective-clinical-study
#6
Soohyun Kim, Lawrence Chang, Bianca Weinstock-Guttman, Sirin Gandhi, Dejan Jakimovski, Ellen Carl, Robert Zivadinov, Murali Ramanathan
OBJECTIVES: To investigate the factors associated with complementary and alternative medicine (CAM) usage by multiple sclerosis (MS) patients. Design, Setting/Location: Single-center, prospective clinical study at an academic MS center in the northeastern United States. METHODS: This study included CAM data from 524 MS patients and 304 healthy controls (HC) enrolled in a prospective study of clinical, neuroimaging, and environmental risk factors in MS at an academic MS Center...
March 2, 2018: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/29458916/use-of-complementary-and-alternative-medicine-in-patients-with-multiple-sclerosis-in-germany
#7
Mario Gotta, Christoph A Mayer, Jutta Huebner
BACKGROUND: The use of complementary and alternative medicine (CAM) for chronic diseases such as multiple sclerosis (MS) is becoming an increasingly important issue for those affected. Especially in Germany there are only a few studies dealing with CAM, as yet. The aim of this study was to assess the prevalence, the methods used, the subjective benefits as well as physician/patient communication. METHODS: A structured questionnaire including demographic and disease-specific data, CAM use, perceived benefits as well as physician/patient communication was sent to real and web-based self-help groups for MS in Germany...
February 2018: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/29344225/metformin-enhances-the-chemosensitivity-of-hepatocarcinoma-cells-to-cisplatin-through-ampk-pathway
#8
Hao Dong, Jungang Huang, Kang Zheng, Dong Tan, Qi Chang, Genqiang Gong, Qing Zhang, Hanqiu Tang, Jianguo Sun, Shaoyu Zhang
This study investigated the effect of metformin on chemosensitivity of hepatocarcinoma cells to cisplatin and the possible mechanism. HepG2 and Huh-7 hepatoma cells were treated with cisplatin at concentrations of 0, 2, 4, 6, 8 and 10 µM for 48 h. Proliferation of HepG2 and Huh-7 hepatoma cells were detected by MTT assay. Apoptosis of hepatocellular carcinoma cells was detected by flow cytometry. Western blot analysis was used to detect the expression of 5-monophosphate-activated protein kinase (AMPK) and p-AMPK protein...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29333772/-effect-of-different-surface-processes-on-the-bond-strength-between-zirconia-framework-and-veneering-ceramic
#9
Gong Qi, Sun Huiqiang, Hu Yijun, Chen Jia, Ding Weishan
OBJECTIVE: To compare the effect of different surface processes on bond strength and microscopic structure using a scanning electron microscope (SEM) and an energy distribution spectrum (EDS) at the bonding interface between zirconia framework and veneering ceramic. METHODS: WIELAND zirconia core material was cut into 33 rectangular specimens and fired on into rectangular specimens (10 mm×5 mm×5 mm). The specimens were randomly divided into three groups (n=
11)...
December 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29297349/a-geometric-method-for-contour-extraction-of-drosophila-embryos
#10
Qi Li, Yongyi Gong
BACKGROUND: High resolution images of Drosophila embryos in their developmental stages contain rich spatial and temporal information of gene expression. Automatic extraction of the contour of an embryo of interest in an embryonic image is a critical step of a computational system used to discover gene-gene interaction on Drosophila. RESULTS: We propose a geometric method for contour extraction of Drosophila embryos. The key of the proposed geometric method is k-dominant point extraction that is a generalization of 3-dominant point extraction proposed in our previous work...
December 14, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/29228741/autophagy-inhibition-sensitizes-ly3023414-induced-anti-glioma-cell-activity-in-vitro-and-in-vivo
#11
Lan Zheng, Huanyin Li, Yanqing Mo, Gong Qi, Bin Liu, Jing Zhao
PI3K-AKT-mTOR signaling is a valuable treatment target for human glioma. LY3023414 is a novel, highly-potent and pan PI3K-AKT-mTOR inhibitor. Here, we show that LY3023414 efficiently inhibited survival and proliferation of primary and established human glioma cells. Meanwhile, apoptosis activation was observed in LY3023414-treated glioma cells. LY3023414 blocked AKT-mTOR activation in human glioma cells. Further studies show that LY3023414 induced feedback activation of autophagy in U251MG cells. On the other hand, autophagy inhibition via adding pharmacological inhibitors or silencing Beclin-1/ATG-5 significantly potentiated LY3023414-induced glioma cell apoptosis...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29193873/simple-and-accurate-method-for-determining-dissolved-inorganic-carbon-in-environmental-water-by-reaction-headspace-gas-chromatography
#12
Wei-Qi Xie, Yi-Xian Gong, Kong-Xian Yu
We investigate a simple and accurate method for quantitatively analyzing dissolved inorganic carbon in environmental water by reaction headspace gas chromatography. The neutralization reaction between the inorganic carbon species (i.e. bicarbonate ions and carbonate ions) in environmental water and hydrochloric acid is carried out in a sealed headspace vial, and the carbon dioxide formed from the neutralization reaction, the self-decomposition of carbonic acid, and dissolved carbon dioxide in environmental water is then analyzed by headspace gas chromatography...
March 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29171868/efficient-quantification-of-water-content-in-edible-oils-by-headspace-gas-chromatography-with-vapour-phase-calibration
#13
Wei-Qi Xie, Yi-Xian Gong, Kong-Xian Yu
BACKGROUND: An automated and accurate headspace gas chromatographic (HS-GC) technique was investigated for rapidly quantifying water content in edible oils. In this method, multiple headspace extraction (MHE) procedures were used to analyse the integrated water content from the edible oil sample. A simple vapour phase calibration technique with an external vapour standard was used to calibrate both the water content in the gas phase and the total weight of water in edible oil sample. After that the water in edible oils can be quantified...
November 24, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29143697/stroke-and-food-groups-an-overview-of-systematic-reviews-and-meta-analyses
#14
Cuiyu Deng, Qi Lu, Bingyan Gong, Liya Li, Lianxia Chang, Li Fu, Yue Zhao
OBJECTIVE: Numerous systematic reviews of prospective studies on the association of stroke risk with the consumption of various food groups have been published. A review of the evidence across the existing systematic reviews and meta-analyses of prospective studies was conducted to provide an overview of the range and validity of the reported associations of food groups with stroke risk. DESIGN: The PubMed, EMBASE and Cochrane Library databases were searched for articles published up to September 2015 to identify systematic reviews of prospective studies...
March 2018: Public Health Nutrition
https://www.readbyqxmd.com/read/29120854/the-protective-effects-of-bacillus-licheniformis-preparation-on-gastrointestinal-disorders-and-inflammation-induced-by-radiotherapy-in-pediatric-with-central-nervous-system-tumor
#15
Shu-Xu Du, Yong-Rui Jia, Si-Qi Ren, Xiao-Jun Gong, Hong Tang, Wu Wan-Shui, Sun Li-Ming
PURPOSE: we studied the effect of Bacillus licheniformis preparation (ZCS) on CNST (central nervous system tumor) patients undergoing the gastrointestinal symptoms and inflammation induced by radiotherapy. MATERIALS AND METHODS: 160 CNST patients with craniospinal irradiation (CSI) treatment were divided into experiment and control group. The experiment group patients took one capsule per time of ZCS and three times a day until the end of radiotherapy, starting one day before radiotherapy...
November 6, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28944857/a-novel-fbn1-mutation-causes-autosomal-dominant-marfan-syndrome
#16
Ying Xiao, Xiaoqi Liu, Xiaoxin Guo, Liping Liu, Linxin Jiang, Qi Wang, Bo Gong
Marfan syndrome (MFS) is an inherited and systemic disorder. It has been reported that mutations in the fibrillin‑1 gene (FBN1) account for ~90% of autosomal dominant cases of MFS. This study was conducted to screen mutations of FBN1 in a Chinese family with autosomal dominant MFS; four individuals including two patients with MFS were recruited. The family members underwent complete physical, cardiovascular and ophthalmologic examinations. Genomic DNA samples were collected from the family along with 383 unrelated healthy subjects...
November 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28927936/rapid-quantitative-detection-of-glucose-content-in-glucose-injection-by-reaction-headspace-gas-chromatography
#17
Wei-Qi Xie, Yi-Xian Gong, Kong-Xian Yu
This work investigates an automated technique for rapid detecting the glucose content in glucose injection by reaction headspace gas chromatography (HS-GC). This method is based on the oxidation reaction of glucose in glucose injection with potassium dichromate. The carbon dioxide (CO2) formed from the oxidation reaction can be quantitatively detected by GC. The results show that the relative standard deviation (RSD) of the present method was within 2.91%, and the measured glucose contents in glucose injection closely match those quantified by the reference method (relative differences <6...
September 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28915274/prevalence-of-mind-and-body-exercises-mbe-in-relation-to-demographics-self-rated-health-and-purchases-of-prescribed-psychotropic-drugs-and-analgesics
#18
MULTICENTER STUDY
Lina Rådmark, Linda L Magnusson Hanson, Eva Bojner Horwitz, Walter Osika
This study aims to identify any differences regarding gender, age, socioeconomic status (SES), self-rated health, perceived stress and the purchase of prescribed drugs among people who practice mind and body exercises (MBE) extensively compared to people who do not. METHODS: The study includes 3,913 men and 4,803 women aged 20-72 who participated in the Swedish Longitudinal Occupational Survey of Health (SLOSH). The respondents were divided into three groups depending on frequency of MBE practice (never/seldom/often)...
2017: PloS One
https://www.readbyqxmd.com/read/28880235/risk-assessment-of-metals-in-urban-soils-from-a-typical-industrial-city-suzhou-eastern-china
#19
Gang Wang, Hou-Qi Liu, Yu Gong, Yang Wei, Ai-Jun Miao, Liu-Yan Yang, Huan Zhong
Risk of metals in urban soils is less studied, compared to that in other types of soils, hindering accurate assessment of human exposure to metals. In this study, the concentrations of five metals (As, Cd, Cr, Pb, and Hg) were analyzed in 167 surface soil samples collected from Suzhou city and their potential ecological and human health risks were assessed. The mean concentrations of As, Cd, Pb, and Hg except Cr, were higher than the background values in Jiangsu Province. Metal concentrations varied among districts, where sites of high contamination showed a punctate distribution...
September 7, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28691150/quantitative-analysis-of-total-starch-content-in-wheat-flour-by-reaction-headspace-gas-chromatography
#20
Wei-Qi Xie, Yi-Xian Gong, Kong-Xian Yu
This paper proposed a new reaction headspace gas chromatographic (HS-GC) method for efficiently quantifying the total starch content in wheat flours. A certain weight of wheat flour was oxidized by potassium dichromate in an acidic condition in a sealed headspace vial. The results show that the starch in wheat flour can be completely transferred to carbon dioxide at the given conditions (at 100 °C for 40 min) and the total starch content in wheat flour sample can be indirectly quantified by detecting the CO2 formed from the oxidation reaction...
September 2017: Analytical and Bioanalytical Chemistry
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