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https://www.readbyqxmd.com/read/29288598/in-situ-derivatization-and-hollow-fiber-liquid-phase-microextraction-to-determine-sulfonamides-in-water-using-uhplc-with-fluorescence-detection
#1
Lihua Yang, Yang Shi, Jinjin Li, Tiangang Luan
A sensitive method for determining sulfonamides in water was developed and validated through in situ derivatization and hollow-fiber liquid-phase microextraction with ultra high performance liquid chromatography and fluorescence detection. The target sulfonamides were sulfadiazine, sulfacetamide, sulfamerazine, sulfamethazine, sulfamethoxypyridazine, sulfachloropyridazine, sulfamethoxazole, and sulfisoxazole. Following in situ derivatization with fluorescamine, three-phase hollow-fiber liquid-phase microextraction with an S 6/2 polypropylene hollow-fiber membrane was applied automatically using a multipurpose autosampler...
December 30, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/29214503/epidemiology-and-clinical-characteristics-of-human-coronaviruses-oc43-229e-nl63-and-hku1-a-study-of-hospitalized-children-with-acute-respiratory-tract-infection-in-guangzhou-china
#2
Zhi-Qi Zeng, De-Hui Chen, Wei-Ping Tan, Shu-Yan Qiu, Duo Xu, Huan-Xi Liang, Mei-Xin Chen, Xiao Li, Zheng-Shi Lin, Wen-Kuan Liu, Rong Zhou
Human coronaviruses (HCoV) OC43, 229E, NL63, and HKU1 are common respiratory viruses which cause various respiratory diseases, including pneumonia. There is a paucity of evidence on the epidemiology and clinical manifestations of these four HCoV strains worldwide. We collected 11,399 throat swabs from hospitalized children with acute respiratory tract infection from July 2009 to June 2016 in Guangzhou, China. These were tested for four strains of HCoV infection using real-time polymerase chain reaction (PCR)...
December 6, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29174310/gefitinib-versus-vinorelbine-plus-cisplatin-as-adjuvant-treatment-for-stage-ii-iiia-n1-n2-egfr-mutant-nsclc-adjuvant-ctong1104-a-randomised-open-label-phase-3-study
#3
Wen-Zhao Zhong, Qun Wang, Wei-Min Mao, Song-Tao Xu, Lin Wu, Yi Shen, Yong-Yu Liu, Chun Chen, Ying Cheng, Lin Xu, Jun Wang, Ke Fei, Xiao-Fei Li, Jian Li, Cheng Huang, Zhi-Dong Liu, Shun Xu, Ke-Neng Chen, Shi-Dong Xu, Lun-Xu Liu, Ping Yu, Bu-Hai Wang, Hai-Tao Ma, Hong-Hong Yan, Xue-Ning Yang, Qing Zhou, Yi-Long Wu
BACKGROUND: Cisplatin-based adjuvant chemotherapy is the standard of care for patients with resected stage II-IIIA non-small-cell lung cancer (NSCLC). RADIANT and SELECT trial data suggest patients with EGFR-mutant stage IB-IIIA resected NSCLC could benefit from adjuvant EGFR tyrosine kinase inhibitor treatment. We aimed to compare the efficacy of adjuvant gefitinib versus vinorelbine plus cisplatin in patients with completely resected EGFR-mutant stage II-IIIA (N1-N2) NSCLC. METHODS: We did a randomised, open-label, phase 3 trial at 27 centres in China...
November 21, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/29072879/cockroach-is-a-major-cross-reactive-allergen-source-in-shrimp-sensitized-rural-children-in-southern-china
#4
Zhaowei Yang, Jiefeng Zhao, Nili Wei, Mulin Feng, Mo Xian, Xu Shi, Zhenyu Zheng, Qiujuan Su, Gary W K Wong, Jing Li
BACKGROUND: Little is known about the prevalence of food allergy (FA) in China. OBJECTIVE: To investigate the prevalence of FA and its disparity between urban and rural areas in southern China. METHODS: Europrevall questionnaire responses were obtained from 5,542 school-age-children in urban Guangzhou and 5,319 in rural Shaoguan. A case-control study enrolled 190 children with adverse reactions (ARs) after food intake as cases, and 212 controls in Guangzhou; 116 cases and 233 controls in Shaoguan...
October 26, 2017: Allergy
https://www.readbyqxmd.com/read/28940828/interface-manipulation-to-improve-plasmon-coupled-photoelectrochemical-water-splitting-on-%C3%AE-fe2-o3-photoanodes
#5
Zhe Xu, Zhongwen Fan, Zhan Shi, Mengyu Li, Jianyong Feng, Lang Pei, Chenguang Zhou, Junkang Zhou, Lingxia Yang, Wenchao Li, Guangzhou Xu, Shicheng Yan, Zhigang Zou
The plasmon resonance effect of metal nanoparticles (NPs) offers a promising route to improve the solar energy conversion efficiency of semiconductors. In this study, it is revealed that hot electrons generated by the plasmon resonance effect of Au NPs tend to inject into the surface states instead of the conduction band of Fe2 O3 photoanodes, and then severe surface recombination occurs. Such an electron-transfer process seems to be independent of external applied potentials, but is sensitive to metal-semiconductor interface properties...
January 10, 2018: ChemSusChem
https://www.readbyqxmd.com/read/28938484/long-noncoding-rnas-potential-regulators-involved-in-the-pathogenesis-of-polycystic-ovary-syndrome
#6
Yu-Dong Liu, Ying Li, Shu-Xian Feng, De-Sheng Ye, Xin Chen, Xing-Yu Zhou, Shi-Ling Chen
Polycystic ovary syndrome (PCOS) is the most common cause of anovulatory infertility in women of reproductive age, and its etiology remains poorly understood. Altered activities of long noncoding RNAs (lncRNAs) have been associated with human diseases and development. However, the roles of lncRNAs are unknown in reproductive medicine. We investigated the potential role of lncRNAs in the pathogenesis of PCOS, using human granulosa cells (GCs) and the KGN cell line. We used microarrays to compare lncRNA expression profiles in GCs from seven patients with PCOS and seven matched women...
November 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28917169/short-term-associations-of-ambient-air-pollution-and-cause-specific-emergency-department-visits-in-guangzhou-china
#7
Pi Guo, Wenru Feng, Murui Zheng, Jiayun Lv, Li Wang, Ju Liu, Yanhong Zhang, Gangfeng Luo, Yanting Zhang, Changyu Deng, Tongxing Shi, Pengda Liu, Lin Zhang
BACKGROUND: Evidence of association of ambient air pollution with cause-specific emergency department visits in China is still limited. This study aimed to investigate short-term associations between exposures to air pollutants and daily cause-specific emergency department visits using a large-scale multicenter database involving a total of 65 sentinel hospitals in Guangzhou, the most densely-populated city in south China, during 2013-2015. MATERIAL AND METHODS: We obtained data on 162,771 emergency department visits from 65 hospitals from the Emergency Medical Command Center in Guangzhou between January 1, 2013 and December 31, 2015...
February 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28839992/optical-coherence-tomography-in-imaging-of-peripheral-pulmonary-arteries
#8
Cheng Hong, Nan-Shan Zhong, Chun-Li Liu, Nuo-Fu Zhang, Shi-Yue Li, Wei Wang
BACKGROUND: To establish an optical coherence tomography (OCT)-based method for imaging peripheral pulmonary arteries. METHODS: We recruited eight patients (five men; average age, 48±12 years; peripheral pulmonary artery thrombosis, three patients; idiopathic pulmonary hypertension, three patients; interstitial lung disease, two patients) who underwent OCT of the peripheral pulmonary arteries in the First Affiliated Hospital of Guangzhou Medical University and Guangzhou Institute of Respiratory Diseases, between September 2009 and September 2010...
July 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28794420/interrelationship-of-rotavirus-infection-and-creatine-kinase-mb-isoenzyme-levels-in-children-hospitalized-with-acute-gastroenteritis-in-guangzhou-china-2012-2015
#9
Jianbin Zheng, Haiqing Zheng, Ramit Kumar Gupta, Huixian Li, Hui Shi, Liyan Pan, Sitang Gong, Huiying Liang
Elevated levels of Creatine Kinase-MB (CK-MB) Isoenzyme are a common phenomenon among rotavirus (RV) diarrhea. However, few studies have addressed this issue using large sample size. In current study, 1,118 children (age <5 years) hospitalized with diarrhea in Guangzhou Women and Children's Medical Center from 2012 to 2015 were finally included. Changing pattern of CK-MB and its relationship with RV-infection were analyzed and characterized. Multivariate linear regression models showed that RV-positive cases had a 28% rise in CK-MB compared to RV-negative cases (OR = 1...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28626769/the-effect-of-social-support-on-glycemic-control-in-patients-with-type-2-diabetes-mellitus-the-mediating-roles-of-self-efficacy-and-adherence
#10
Yechang Shao, Lu Liang, Linjing Shi, Chengsong Wan, Shouyi Yu
Ample evidence suggests that social support, self-efficacy, and adherence significantly, independently, and together affect glycemic control in patients with type 2 diabetes mellitus (T2DM), but the pathway from social support to glycemic control remains unclear. This study hypothesized that the effect of social support on glycemic control was mediated sequentially by self-efficacy and adherence. Patients with T2DM were recruited from two hospitals in Guangzhou, China, from January 1 to July 31, 2014, and their sociodemographic clinical data and their assessments on social support, self-efficacy, and adherence were obtained from medical records and self-completed questionnaires...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28623330/assessing-spatial-and-temporal-patterns-of-observed-ground-level-ozone-in-china
#11
Wan-Nan Wang, Tian-Hai Cheng, Xing-Fa Gu, Hao Chen, Hong Guo, Ying Wang, Fang-Wen Bao, Shuai-Yi Shi, Bin-Ren Xu, Xin Zuo, Can Meng, Xiao-Chuan Zhang
Elevated ground-level ozone (O3), which is an important aspect of air quality related to public health, has been causing increasing concern. This study investigated the spatiotemporal distribution of ground-level O3 concentrations in China using a dataset from the Chinese national air quality monitoring network during 2013-2015. This research analyzed the diurnal, monthly and yearly variation of O3 concentrations in both sparsely and densely populated regions. In particular, 6 major Chinese cities were selected to allow a discussion of variations in O3 levels in detail, Beijing, Chengdu, Guangzhou, Lanzhou, Shanghai, and Urumchi, located on both sides of the Heihe-Tengchong line...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28523178/one-successful-primary-closure-case-of-bronchopleural-fistula-after-pneumonectomy-by-a-new-method
#12
Zhenliang Shi, Yijun Xu, Zheng Wang, Xun Zhang
One case of successful primary closure of a bronchopleural fistula (BPF) after right pneumonectomy by sealing from both inside the chest cavity and bronchus is reported. The patient was a 47-year-old man who underwent right pneumonectomy due to right lung total collapse and atelectasis which was long-term compressed by a huge cyst inside the right chest cavity. A BPF was found on day 20 after surgery. A thoracotomy approach was performed because it was difficult to find an appropriate location for close drainage...
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449457/nomogram-prediction-for-the-survival-of-the-patients-with-small-cell-lung-cancer
#13
Hui Pan, Xiaoshun Shi, Dakai Xiao, Jiaxi He, Yalei Zhang, Wenhua Liang, Zhi Zhao, Zhihua Guo, Xusen Zou, Jinxin Zhang, Jianxing He
BACKGROUND: Small cell lung cancer (SCLC) is a subtype of lung cancer with poor prognosis. In this study, we aimed to build a nomogram to predict the survival of individual with SCLC by incorporating significant clinical parameters. METHODS: The patients with SCLC were enrolled from the First Affiliated Hospital of Guangzhou Medical University (GMUFAH) between 2009 and 2013. We identified and incorporated the independent prognostic factors to build a nomogram to predict the survival of SCLC patients...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28329931/-simulation-study-of-air-quality-health-index-in-5-cities-in-china-2013-2015
#14
W T Wang, Q H Sun, J Qin, T T Li, X M Shi
Objective: To construct the air quality health index (AQHI) by inclusion of air pollutants PM(2.5) and O(3) in Guangzhou, Shanghai, Xi' an, Beijing, Shenyang, and explore scientificity and feasibility of its application in China. Methods: The daily average concentrations of PM(2.5) and O(3) in air, and daily average mortality from 2013 to 2015 in the 5 cities in China, the exposure-response coefficients of PM(2.5) and O(3) and total mortality from Meta studies in China were used to construct local AQHI. The health risk levels of air pollution in the 5 cities were calculated and compared with the characteristics of single pollutant concentrationof PM(2...
March 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28197732/effects-of-street-canyon-design-on-pedestrian-thermal-comfort-in-the-hot-humid-area-of-china
#15
Yufeng Zhang, Xiaohan Du, Yurong Shi
The design characteristics of street canyons were investigated in Guangzhou in the hot-humid area of China, and the effects of the design factors and their interactions on pedestrian thermal comfort were studied by numerical simulations. The ENVI-met V4.0 (BASIC) model was validated by field observations and used to simulate the micrometeorological conditions and the standard effective temperature (SET) at pedestrian level of the street canyons for a typical summer day of Guangzhou. The results show that the micrometeorological parameters of mean radiant temperature (MRT) and wind speed play key roles in pedestrian thermal comfort...
February 14, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28147327/validation-of-different-staging-systems-for-hepatocellular-carcinoma-in-a-cohort-of-249-patients-undergoing-radiotherapy
#16
Zhi-Rui Zhou, Min Liu, Hui-Rong Lu, Ye-Fei Li, Shi-Xiong Liang, Chun-Yan Zhang
There is no consensus on predicting prognosis for hepatocellular carcinoma patients undergoing radiotherapy. This study aims to evaluate the validity of different staging systems. Overall, 249 hepatocellular carcinoma patients were evaluated retrospectively. All patients were classified by different staging systems. The cumulative survival rates were calculated using the Kaplan-Meier method, and survival curves were compared using the log-rank test. Harrell's concordance index (c-index) was calculated. The 1-, 3-, and 5-year overall survival rates were 58%, 31% and 20%, respectively...
July 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/27968849/a-novel-risk-score-mcct-to-guide-decision-for-treatment-of-advanced-hepatocellular-carcinoma-with-transarterial-chemoembolisation-a-derivation-and-validation-study
#17
Yong-Fa Zhang, Ming Shi, Rong-Ping Guo
BACKGROUND: Transarterial chemoembolisation (TACE) is still widely used to treat patients with advanced hepatocellular carcinoma who have no access to sorafenib in Asia. However, the indication of TACE for these patients has yet to be established. We established an objective point score to guide this decision in patients with advanced-stage hepatocellular carcinoma. METHODS: We developed a scoring system (MCCT score) based on preoperative data from a cohort of 422 patients receiving TACE as the first treatment for advanced hepatocellular carcinoma from 2006 to 2013 at Sun Yat-sen University Cancer Center, Guangzhou, China...
October 2016: Lancet
https://www.readbyqxmd.com/read/27959883/antibiotic-susceptibility-of-legionella-strains-isolated-from-public-water-sources-in-macau-and-guangzhou
#18
Lina Xiong, He Yan, Lei Shi, Ziyao Mo
The purpose of this study was to investigate the susceptibility of waterborne strains of Legionella to eight antimicrobials commonly used in legionellosis therapy. The minimum inhibitory concentrations (MICs) of 66 environmental Legionella strains, isolated from fountains and cooling towers of public facilities (hotels, schools, and shopping malls) in Macau and Guangzhou, were tested using the microdilution method in buffered yeast extract broth. The MIC50/MIC90 values for erythromycin, cefotaxime (CTX), doxycycline (DOC), minocycline (MIN), azithromycin, ciprofloxacin, levofloxacin (LEV), and moxifloxacin were 0...
December 2016: Journal of Water and Health
https://www.readbyqxmd.com/read/27903224/evaluation-on-monocyte-mediated-delivery-of-a-therapeutic-gene-into-the-inflamed-brain
#19
Hsin-I Tong, Wen Kang, Guangzhou Zhou, Min Liu, Yingli Shi, Yuanan Lu
This study was aimed to explore the potential of a non-invasive monocytes-based delivery system to transport therapeutic genes into the diseased brain. The study was conducted by first establishing the optimized conditions for lentiviral vector (LV)-mediated gene transfer into freshly isolated monocytes, followed by investigating the inflamed-brain homing efficiency and in vivo cell-mediated transgene expression by carrier monocytes in a mouse model with acute subregional neuroinflammation. Using a newly optimized spin-infection method, up to 35% of freshly isolated monocytes were successfully transduced with the LV system DHIV-101 at M...
November 18, 2016: Current Gene Therapy
https://www.readbyqxmd.com/read/27722053/epidemiological-and-molecular-characterization-of-dengue-viruses-imported-into-guangzhou-during-2009-2013
#20
Yongxia Shi, Shufen Li, Xiaobo Li, Kui Zheng, Shuai Yuan, Jicheng Huang
BACKGROUND: Dengue virus causes one of the most significant infectious diseases in tropical and subtropical regions, notable number of which is imported into China every year. RESULTS: In this study, the molecular epidemiologic and phylogenetic analyses of dengue cases imported into Guangzhou in South China during 2009-2013 were conducted. During that period, 46 imported dengue cases were identified, including four serotypes. Most of the dengue patients were travelling from Southeast Asia, South Asia and Africa...
2016: SpringerPlus
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