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  1 / 851 MEDLINE  
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PMID:28264625
Autor:Zhao C; Wang CC; Li JQ; Wang P; Ou JQ; Cui JR
Endereço:a Beijing Key Laboratory of Functional Materials for Building Structure and Environment , Remediation Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China.
Título:Interactions between copper(II) and DOM in the urban stormwater runoff: modeling and characterizations.
Fonte:Environ Technol; 39(1):120-129, 2018 Jan.
ISSN:0959-3330
País de publicação:England
Idioma:eng
Resumo:Dissolved organic matter (DOM) can strongly interact with both organic and inorganic contaminants to influence their transportation, transformation, bioavailability, toxicity and even their ultimate fate. Within this work, DOM was extracted from urban stormwater runoff samples collected from a regular sampling site of a typical residential area in Beijing, China. Copper(II) ions were selected as model to investigate the interactions between DOM and typical heavy metals. Both ultraviolet (UV) absorbance and fluorescence titration methods were introduced to determine the complex capacities (C ) and conditional stability constants (log K ) of bonding between DOM and copper (II) ions, which revealed that the values of C were 85.62 and 87.23 µmol mg and the log K values were 5.37 and 5.48, respectively. The results suggested the successful complexation between DOM and copper(II) ions. Furthermore, morphology of the DOM binding to copper(II) ions was confirmed by both energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS), which can facilitate to clarify the corresponding mechanism. The Cu 2p peak at 933.7 eV and the characteristic shake-up peaks of Cu-O were found in the XPS spectra, implying that copper(II) ions might coordinate with hydroxyl (aliphatic or phenolic) or carboxyl groups. With these profitable results, it can be concluded that DOM in urban stormwater runoff has a strong binding affinity with copper(II) ions, which may further lead to potentially significant influence on their migration and transformation.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Humic Substances); 0 (Waste Water); 0 (Water Pollutants, Chemical); 789U1901C5 (Copper)


  2 / 851 MEDLINE  
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PMID:29188670
Autor:Sun DP; Min YL; Lian CZ; Yu WD
Endereço:Nanjing Public Security Bureau, Nanjing 210012, China.
Título:[Genetic Polymorphisms of 24 Y-STR Loci in Nanjing Han Population].
Fonte:Fa Yi Xue Za Zhi; 32(4):269-272, 2016 Aug.
ISSN:1004-5619
País de publicação:China
Idioma:chi
Resumo:OBJECTIVES: To investigate the genetic polymorphism of and other 23 Y-STR loci and to explore its application value in forensic science. METHODS: Y-STRs loci of 580 unrelated Han males in Nanjing were amplified using AGCU Y-PLUS PCR (24) kit. The genetic parameters of 24 Y-STR loci such as gene frequency were calculated by software, and compared with the data of Hubei, Liao- ning, Guangdong, Beijing and Chengdu Han population. RESULTS: Total 580 haplotypes were detected among 24 Y-STR loci in 580 unrelated Han males in Nanjing. The genetic diversity (GD) of each locus was from 0.294 6 to 0.939 8, and the haplotypes diversity (HD) was 0.983 7. There was a significant difference between the GD of 6 areas. CONCLUSIONS: The 24 Y-STR loci such as in Nanjing Han population have an application value in forensic science. They can also be used for cases testing and pedigree investigation.
Tipo de publicação: JOURNAL ARTICLE


  3 / 851 MEDLINE  
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PMID:29478663
Autor:Zhang Q; Liu J; He Y; Yang J; Gao J; Liu H; Tang W; Chen Y; Fan W; Chen X; Chai F; Hatakeyama S
Endereço:College of Environmental & Resource Sciences of Zhejiang University, Hangzhou 310058, China.
Título:Measurement of hydrogen peroxide and organic hydroperoxide concentrations during autumn in Beijing, China.
Fonte:J Environ Sci (China); 64:72-81, 2018 Feb.
ISSN:1001-0742
País de publicação:Netherlands
Idioma:eng
Resumo:Gaseous peroxides play important roles in atmospheric chemistry. To understand the pathways of the formation and removal of peroxides, atmospheric peroxide concentrations and their controlling factors were measured from 7:00 to 20:00 in September, October, and November 2013 at a heavily trafficked residential site in Beijing, China, with average concentrations of hydrogen peroxide (H O ) and methyl hydroperoxide (MHP) at 0.55ppb and 0.063ppb, respectively. H O concentrations were higher in the afternoon and lower in the morning and evening, while MHP concentrations did not exhibit a regular diurnal pattern. Both H O and MHP concentrations increased at dusk in most cases. Both peroxides displayed monthly variations with higher concentrations in September. These results suggested that photochemical activity was the main controlling factor on variations of H O concentrations during the measurement period. Increasing concentrations of volatile organic compounds emitted by motor vehicles were important contributors to H O and MHP enrichment. High levels of H O and MHP concentrations which occurred during the measurement period probably resulted from the transport of a polluted air mass with high water vapor content passing over the Bohai Bay, China.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Air Pollutants); 0 (Peroxides); 0 (Volatile Organic Compounds); BBX060AN9V (Hydrogen Peroxide)


  4 / 851 MEDLINE  
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PMID:29478655
Autor:Wang M; Liu R; Chen W; Peng C; Markert B
Endereço:State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.. Electronic address: mewang@rcees.ac.cn.
Título:Effects of urbanization on heavy metal accumulation in surface soils, Beijing.
Fonte:J Environ Sci (China); 64:328-334, 2018 Feb.
ISSN:1001-0742
País de publicação:Netherlands
Idioma:eng
Resumo:Urbanization processes affect the accumulation of heavy metals in urban soils. Effects of urbanization on heavy metal accumulation in soils were studied using Beijing as an example. It has been suggested that the ecological function of vegetation covers shifting from natural to agricultural settings and then to urban greenbelts could increase the zinc (Zn) concentrations of soils successively. The Zn concentration of urban soils was significantly correlated to the percentage of the impervious land surface at the 500m×500m spatial scale. For urban parks, the age or years since the development accounted for 80% of the variances of cadmium (Cd) and Zn in soils. The population density, however, did not affect the heavy metal distributions in urban soils. To conclude, the urban age turned out to be a notable factor in quantifying heavy metal accumulation in urban soils.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Metals, Heavy); 0 (Soil Pollutants)


  5 / 851 MEDLINE  
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PMID:29406101
Autor:Xu P; Zhang J; Ji D; Liu Z; Tang G; Jiang C; Wang Y
Endereço:State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Resources and Envi
Título:Characterization of submicron particles during autumn in Beijing, China.
Fonte:J Environ Sci (China); 63:16-27, 2018 Jan.
ISSN:1001-0742
País de publicação:Netherlands
Idioma:eng
Resumo:In this study, we performed a highly time-resolved chemical characterization of non-refractory submicron particles (NR-PM ) in Beijing by using an Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS). The results showed the average NR-PM mass concentration to be 56.4±58.0µg/m , with a peak at 307.4µg/m . Due to the high frequency of biomass burning in autumn, submicron particles significantly increased in organic content, which accounted for 51% of NR-PM on average. Secondary inorganic aerosols (sulfate+nitrate+ammonium) accounted for 46% of NR-PM , of which sulfate, nitrate, and ammonium contributed 15%, 20%, and 11%, respectively. To determine the intrinsic relationships between the organic and inorganic species, we used the positive matrix factorization (PMF) model to merge the high-resolution mass spectra of the organic species and NO and NO ions. The PMF analysis separated the mixed organic and nitrate (NO and NO ) spectra into four organic factors, including hydrocarbon-like organic aerosol (HOA), oxygenated organic aerosol (OOA), cooking organic aerosol (COA), and biomass burning organic aerosol (BBOA), as well as one nitrate inorganic aerosol (NIA) factor. COA (33%) and OOA (30%) contributed the most to the total organic aerosol (OA) mass, followed by BBOA (20%) and HOA (17%). We successfully quantified the mass concentrations of the organic and inorganic nitrates by the NO and NO ions signal in the organic and NIA factors. The organic nitrate mass varied from 0.01-6.8µg/m , with an average of 1.0±1.1µg/m , and organic nitrate components accounted for 10% of the total nitrate mass in this observation.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Air Pollutants); 0 (Particulate Matter)


  6 / 851 MEDLINE  
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PMID:29406098
Autor:Wang X; Wang J; Li K; Zhang H; Yang M
Endereço:State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: xinwang_st@rcees.ac.cn.
Título:Molecular characterization of effluent organic matter in secondary effluent and reclaimed water: Comparison to natural organic matter in source water.
Fonte:J Environ Sci (China); 63:140-146, 2018 Jan.
ISSN:1001-0742
País de publicação:Netherlands
Idioma:eng
Resumo:Municipal wastewater reclamation is becoming of increasing importance in the world to solve the problem of water scarcity. A better understanding of the molecular composition of effluent organic matter (EfOM) in the treated effluents of municipal wastewater treatment plants (WWTPs) is crucial for ensuring the safety of water reuse. In this study, the molecular composition of EfOM in the secondary effluent of a WWTP in Beijing and the reclaimed water further treated with a coagulation-sedimentation-ozonation process were characterized using a non-target Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) method and compared to that of natural organic matter (NOM) in the local source water from a reservoir. It was found that the molecular composition of EfOM in the secondary effluent and reclaimed water was dominated by CHOS formulas, while NOM in the source water was dominated by CHO formulas. The CHO formulas of the three samples had similar origins. Anthropogenic surfactants were responsible for the CHOS formulas in EfOM of the secondary effluent and were not well removed by the coagulation-sedimentation-ozonation treatment process adopted.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Waste Water); 0 (Water Pollutants, Chemical)


  7 / 851 MEDLINE  
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PMID:29324847
Autor:Wu Y; Ma W; Liu J; Zhu L; Cong L; Zhai J; Wang Y; Zhang Z
Endereço:College of Nature Conservation, Beijing Forestry University, Beijing, China.
Título:Sabina chinensis and Liriodendron chinense improve air quality in Beijing, China.
Fonte:PLoS One; 13(1):e0189640, 2018.
ISSN:1932-6203
País de publicação:United States
Idioma:eng
Resumo:Urban forests have been shown to be efficient for reducing air pollutants especially for particulate matters (PMs). This study aims to reveal the PM blocking capacity of two common artificial landscape species, Sabina chinensis and Liriodendron chinense and to investigate spatial-temporal heterogeneities by estimating the vegetation collection velocity of coarse (PM10) and fine particles (PM2.5) during different seasons and heights. PM concentration and meteorological data were collected on both leeward and windward sides of trees during the daytime in both summers and winters from 2013 to 2015. Concentration and meteorological monitors were installed at three heights, bottom (1.5 m), middle (3.5 m), and top (5.5 m) of the canopy. The results showed: During daytime, the collection velocity changed and PM2.5 collection velocity was much higher than that of PM10. Furthermore, the maximum collection velocities of L. chinense and S. chinensis occurred at 14:00-16:00 both in summer and winter. Moreover, the collection velocity had a positive correlation with wind speed and temperature. The blocking capacities of L. chinense and S. chinensis varied from season to season, and the concentrations of particulate matter indicate the middle canopy of both species as the most effective part for TSP blocking. Furthermore, these two species are more effective blocking in PM2.5 than PM10. The blocking capacity of S. chinensis is generally better. The vegetation collection is the major process of PM removal near the ground and sedimentation was not taken into consideration near the ground.
Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nome de substância:0 (Particulate Matter)


  8 / 851 MEDLINE  
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PMID:28987568
Autor:Li H; Wu S; Pan L; Xu J; Shan J; Yang X; Dong W; Deng F; Chen Y; Shima M; Guo X
Endereço:Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, China.
Título:Short-term effects of various ozone metrics on cardiopulmonary function in chronic obstructive pulmonary disease patients: Results from a panel study in Beijing, China.
Fonte:Environ Pollut; 232:358-366, 2018 Jan.
ISSN:1873-6424
País de publicação:England
Idioma:eng
Resumo:BACKGROUND: Short-term exposure to ambient air pollution has been associated with lower pulmonary function and higher blood pressure (BP). However, controversy remains regarding the relationship between ambient multiple daily ozone (O ) metrics and cardiopulmonary health outcomes, especially in the developing countries. OBJECTIVES: To investigate and compare the short-term effects of various O metrics on pulmonary function, fractional exhaled nitric oxide (FeNO) and BP in a panel study of COPD patients. METHODS: We measured pulmonary function, FeNO and BP repeatedly in a total of 43 patients with COPD for 215 home visits. Daily hourly ambient O concentrations were obtained from central-monitoring stations close to subject residences. We calculated various O metrics [daily 1-h maximum (O -1 h max), maximum 8-h average (O -8 h max) and 24-h average (O -24 h avg)] based on the hourly data. Daily indoor O concentrations were estimated based on estimated indoor/outdoor O ratios. Linear mixed-effects models were used to estimate associations of various O metrics with cardiopulmonary function variables. RESULTS: An interquartile range (IQR) increase in ambient O -8 h max (80.5 µg/m , 5-d) was associated with a 5.9% (95%CI: -11.0%, -0.7%) reduction in forced expiratory volume in 1 s (FEV ) and a 6.2% (95%CI: -10.9%, -1.5%) reduction in peak expiratory flow (PEF). However, there were no significant negative associations between ambient O -1 h max, O -24 h avg and FEV , PEF. An IQR increase in ambient O -1 h max (85.3 µg/m , 6-d) was associated with a 6.7 mmHg (95%CI: 0.7, 12.7) increase in systolic BP. The estimated indoor O were still significantly associated with reduction of FEV and PEF. No significant associations were found between various O metrics and FeNO. CONCLUSIONS: Our results provide clues for the adverse cardiopulmonary effects associated with various O metrics in COPD patients and highlight that O -8 h max was more closely associated with respiratory health variables.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Air Pollutants); 31C4KY9ESH (Nitric Oxide); 66H7ZZK23N (Ozone)


  9 / 851 MEDLINE  
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PMID:28941720
Autor:Liang K; Shi F; Liu J
Endereço:State Key Laboratory of Environmental and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Título:Occurrence and distribution of oligomeric organophosphorus flame retardants in different treatment stages of a sewage treatment plant.
Fonte:Environ Pollut; 232:229-235, 2018 Jan.
ISSN:1873-6424
País de publicação:England
Idioma:eng
Resumo:Oligomeric organophosphate esters (OOPEs) like 2,2-bis(chloromethyl)-propane-1,3-diyltetrakis (2-chloroethyl) bisphosphate (V6), resorcinol bis(diphenylphosphate) (RDP) and bisphenol A bis(diphenylphosphate) (BDP), are widely used as alternatives of Deca-BDE in plastic and electronic consumer products. However, studies on the environmental occurrence and fate of OOPEs are very scarce. This work studied the occurrence, distribution and fate of V6, BDP and RDP during the different treatment stages of a sewage treatment plant (STP) in Beijing, China. To accomplish this, a method to analyze trace V6, BDP and RDP in suspended solids samples and aqueous samples of sewage and sludge was developed by using liquid chromatography tandem mass spectrometry (LC-MS/MS). Using this method, BDP and RDP were detected for the first time in suspended solids of sewage and sludge with a concentration of 2.06-5.82 ng/g dry weight and 0.44-3.45 ng/g dry weight, respectively, whereas their concentration level in the aqueous phase of these samples were below the detection limits of the method. However, V6 was detected in all treatment stages of the STP, with concentrations in the range of 10.2-27.1 ng/L in aqueous phase and 0.40-1.73 ng/g dw in solid phase. Mass balance results indicated that 75.6% of the original V6 mass flow was discharged along with effluent, while 83.3% and 72.2% of the initial RDP and BDP mass flow were lost due to biodegradation, respectively. Nevertheless, compared to the 14 widely used monomeric organophosphate esters (MOPEs), the concentration levels of OOPEs in this studied STP were relatively low.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Benzhydryl Compounds); 0 (Flame Retardants); 0 (Organophosphates); 0 (Phenols); 0 (Plastics); 0 (Resorcinols); 0 (Sewage); 0 (Water Pollutants, Chemical); MLT3645I99 (bisphenol A); YUL4LO94HK (resorcinol)


  10 / 851 MEDLINE  
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PMID:29240729
Autor:Zhao D; Ma R; Zhou T; Yang F; Wu J; Sun H; Liu F; Lu L; Li X; Zuo S; Yao W; Yin J
Título:Introduction of Inactivated Poliovirus Vaccine and Impact on Vaccine-Associated Paralytic Poliomyelitis - Beijing, China, 2014-2016.
Fonte:MMWR Morb Mortal Wkly Rep; 66(49):1357-1361, 2017 Dec 15.
ISSN:1545-861X
País de publicação:United States
Idioma:eng
Resumo:When included in a sequential polio vaccination schedule, inactivated polio vaccine (IPV) reduces the risk for vaccine-associated paralytic poliomyelitis (VAPP), a rare adverse event associated with receipt of oral poliovirus vaccine (OPV). During January 2014, the World Health Organization (WHO) recommended introduction of at least 1 IPV dose into routine immunization schedules in OPV-using countries (1). The Polio Eradication and Endgame Strategic Plan 2013-2018 recommended completion of IPV introduction in 2015 and globally synchronized withdrawal of OPV type 2 in 2016 (2). Introduction of 1 dose of IPV into Beijing's Expanded Program on Immunization (EPI) on December 5, 2014 represented China's first province-wide IPV introduction. Coverage with the first dose of polio vaccine was maintained from 96.2% to 96.9%, similar to coverage with the first dose of diphtheria and tetanus toxoids and pertussis vaccine (DTP) (96.5%-97.2%); the polio vaccine dropout rate (the percentage of children who received the first dose of polio vaccine but failed to complete the series) was 1.0% in 2015 and 0.4% in 2016. The use of 3 doses of private-sector IPV per child decreased from 18.1% in 2014, to 17.4% in 2015, and to 14.8% in 2016. No cases of VAPP were identified during 2014-2016. Successful introduction of IPV into the public sector EPI program was attributed to comprehensive planning, preparation, implementation, robust surveillance for adverse events after immunization (AEFI), and monitoring of vaccination coverage. This evaluation provided information that helped contribute to the expansion of IPV use in China and in other OPV-using countries.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Poliovirus Vaccine, Inactivated); 0 (Poliovirus Vaccine, Oral)



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