WTS database

Title	Pub Year Sort ascending	Author	SearchLink
Natural populations of lactic acid bacteria associated with silage fermentation as determined by phenotype, 16S ribosomal RNA and recA gene analysis	2011	National Institute of Livestock and Grassland Science, Nasushiobara 329-2793, Japan.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Systematic and applied microbiology Periodical, Abbrev. Syst.Appl.Microbiol. Pub Date Free Form May Volume 34 Issue 3 Start Page 235 Other Pages 241 Notes LR: 20151119; CI: Copyright (c) 2011; GENBANK/AB572027; GENBANK/AB572028; GENBANK/AB572029; GENBANK/AB572030; GENBANK/AB572031; GENBANK/AB572032; GENBANK/AB572033; GENBANK/AB572034; GENBANK/AB572035; GENBANK/AB572036; GENBANK/AB572037; GENBANK/AB572038; G Place of Publication Germany ISSN/ISBN 1618-0984; 0723-2020 Accession Number PMID: 21282025 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.syapm.2010.10.003 [doi] Output Language Unknown(0) PMID 21282025 Abstract One hundred and fifty-six strains isolated from corn (Zea mays L.), forage paddy rice (Oryza sativa L.), sorghum (Sorghum bicolor L.) and alfalfa (Medicago sativa L.) silages prepared on dairy farms were screened, of which 110 isolates were considered to be lactic acid bacteria (LAB) according to their Gram-positive and catalase-negative characteristics and, mainly, the lactic acid metabolic products. These isolates were divided into eight groups (A-H) based on the following properties: morphological and biochemical characteristics, gamma-aminobutyric acid production capacity, and 16S rRNA gene sequences. They were identified as Weissella cibaria (36.4%), Weissella confusa (9.1%), Leuconostoc citreum (5.3%), Leuconostoc lactis (4.9%), Leuconostoc pseudomesenteroides (8.0%), Lactococcus lactis subsp. lactis (4.5%), Lactobacillus paraplantarum (4.5%) and Lactobacillus plantarum (27.3%). W. cibaria and W. confusa were mainly present in corn silages, and L. plantarum was dominant on sorghum and forage paddy rice silages, while L. pseudomesenteroides, L. plantarum and L. paraplantarum were the dominant species in alfalfa silage. The corn, sorghum and forage paddy rice silages were well preserved with lower pH values and ammonia-N concentrations, but had higher lactic acid content, while the alfalfa silage had relatively poor quality with higher pH values and ammonia-N concentrations, and lower lactic acid content. The present study confirmed the diversity of LAB species inhabiting silages. It showed that the differing natural populations of LAB on these silages might influence fermentation quality. These results will enable future research on the relationship between LAB species and silage fermentation quality, and will enhance the screening of appropriate inoculants aimed at improving such quality. Descriptors Links Book Title Database Publisher Elsevier GmbH Data Source Authors Pang,H., Qin,G., Tan,Z., Li,Z., Wang,Y., Cai,Y. Original/Translated Title URL Date of Electronic 20110201 PMCID Editors
Comparative evaluation of shear bond strength of composite resin bonded to acid etched or Nd:Yag lased enamel	2011	Department of Pediatric Dentistry, Govt. Dental College and Hospital, Mumbai, India. mm_goswami@yahoo.com	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of the Indian Society of Pedodontics and Preventive Dentistry Periodical, Abbrev. J.Indian Soc.Pedod.Prev.Dent. Pub Date Free Form Apr-Jun Volume 29 Issue 2 Start Page 140 Other Pages 143 Notes LR: 20131121; JID: 8710631; 0 (Composite Resins); 0 (Dental Materials); 0 (Phosphoric Acids); 0 (Z100 composite resin); 0 (single bond); 059QF0KO0R (Water); 454I75YXY0 (Bisphenol A-Glycidyl Methacrylate); 7631-86-9 (Silicon Dioxide); C6V6S92N3C (Zirconium Place of Publication India ISSN/ISBN 1998-3905; 0970-4388 Accession Number PMID: 21911953 Language eng SubFile Comparative Study; Journal Article; D DOI 10.4103/0970-4388.84687 [doi] Output Language Unknown(0) PMID 21911953 Abstract AIMS: In vitro evaluation of the shear bond strength of composite resin bonded to enamel which is pretreated using acid etchant or pulsed Nd:YAG. Qualitative morphological changes in enamel surfaces were observed under a scanning electron microscope (SEM). MATERIALS AND METHODS: 60 extracted human teeth were divided in two groups of 30 each (Groups A and B). In Group A, prepared surface of enamel was etched using 35% phosphoric acid (Scotchbond, 3M). In Group B, enamel was surface treated by a surgical Nd:YAG laser beam (Medilas 4060 Fibertom) at 0.8 W, 10 Hz, for 10 s with 80 mJ/pulse power. Bonding agent (single bond dental adhesive, 3M) was applied over the test areas on 20 samples of Groups A and B each, and light cured. Composite resin (Z 100, 3M) was applied onto the test areas as a 3 mm diameter cylinder, and light cured. The samples were tested for shear bond strength. Remaining 10 samples from each group were observed under SEM for morphological changes. RESULTS: The mean shear bond strength was 20.00 MPa (+/- 1.93) and 13.28 MPa (+/-1.97) for Group A and B, respectively. The difference in mean values was statistically significant between Groups A and B (P Descriptors Links Book Title Database Publisher Data Source Authors Goswami,M., Singh,A. Original/Translated Title URL Date of Electronic PMCID Editors
Nicotine exposure in daily waterpipe smokers and its relation to puff topography	2011	School of Public Health, University of Memphis, Memphis, TN, USA. wmaziak@memphis.edu	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Addictive Behaviors Periodical, Abbrev. Addict.Behav. Pub Date Free Form Apr Volume 36 Issue 4 Start Page 397 Other Pages 399 Notes LR: 20151119; CI: Copyright (c) 2010; GR: CA120142/CA/NCI NIH HHS/United States; GR: DA024876/DA/NIDA NIH HHS/United States; GR: R01 DA024876/DA/NIDA NIH HHS/United States; GR: R01 DA024876-04/DA/NIDA NIH HHS/United States; JID: 7603486; 0 (Tobacco Smoke Place of Publication England ISSN/ISBN 1873-6327; 0306-4603 Accession Number PMID: 21185126 Language eng SubFile Journal Article; Research Support, N.I.H., Extramural; IM DOI 10.1016/j.addbeh.2010.11.013 [doi] Output Language Unknown(0) PMID 21185126 Abstract Waterpipe tobacco smoking is increasing in popularity worldwide and available evidence point to its addictive and harmful potential. This study is conducted to assess nicotine exposure in daily waterpipe smokers, and its correlation with puff topography parameters. Sixty-one waterpipe tobacco smokers (56 males; mean age+/-SD, 30.9+/-9.5years; mean number of weekly waterpipe smoking episodes 7.8+/-5.7) abstained from smoking for at least 24h, and then smoked tobacco from a waterpipe ad libitum in a laboratory setting. During the session puff topography parameters were monitored continuously, and pre- and post-smoking expired-air CO was measured. Before and after smoking, venous blood was sampled for the assessment of plasma nicotine using Gas Chromatography-Mass Spectrometry. The average pre- and post-smoking expired-air CO was 4+/-1.7 and 35.5+/-32.7ppm, respectively (i.e., a CO boost of 31.5ppm, p<.001 mean="" plasma="" nicotine="" concentration="" increased="" from="" pre-smoking="" to="" post-smoking="" boost="" was="" correlated="" with="" total="" session="" time="" correlation="" coefficient="" r=".31," p=".04)," cumulative="" puff="" duration="" and="" smoke="" inhaled="" in="" the="" these="" data="" show="" considerable="" exposure="" daily="" waterpipe="" smokers="" that="" is="" a="" function="" of="" smoking="" patterns.=""> Descriptors Links Book Title Database Publisher Elsevier Ltd Data Source Authors Maziak,W., Rastam,S., Shihadeh,A.L., Bazzi,A., Ibrahim,I., Zaatari,G.S., Ward,K.D., Eissenberg,T. Original/Translated Title URL Date of Electronic 20101202 PMCID PMC3040439 Editors
Nicotine, carbon monoxide, and carcinogen exposure after a single use of a water pipe	2011	Division of Clinical Pharmacology, University of California, San Francisco, San Francisco General Hospital, Building 100, San Francisco, CA 94110, USA. peyton.jacob@ucsf.edu	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology Periodical, Abbrev. Cancer Epidemiol.Biomarkers Prev. Pub Date Free Form Nov Volume 20 Issue 11 Start Page 2345 Other Pages 2353 Notes LR: 20151119; CI: (c) 2011; GR: DA012393/DA/NIDA NIH HHS/United States; GR: P30 DA012393/DA/NIDA NIH HHS/United States; GR: P30 DA012393-08/DA/NIDA NIH HHS/United States; GR: P30 DA012393-09/DA/NIDA NIH HHS/United States; GR: P30 DA012393-10/DA/NIDA NIH H Place of Publication United States ISSN/ISBN 1538-7755; 1055-9965 Accession Number PMID: 21908725 Language eng SubFile Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; IM DOI 10.1158/1055-9965.EPI-11-0545 [doi] Output Language Unknown(0) PMID 21908725 Abstract BACKGROUND: Smoking tobacco preparations in a water pipe (hookah) is widespread in many places of the world, including the United States, where it is especially popular among young people. Many perceive water pipe smoking to be less hazardous than cigarette smoking. We studied systemic absorption of nicotine, carbon monoxide, and carcinogens from one water pipe smoking session. METHODS: Sixteen subjects smoked a water pipe on a clinical research ward. Expired carbon monoxide and carboxyhemoglobin were measured, plasma samples were analyzed for nicotine concentrations, and urine samples were analyzed for the tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) and polycyclic aromatic hydrocarbon (PAH) metabolite biomarker concentrations. RESULTS: We found substantial increases in plasma nicotine concentrations, comparable to cigarette smoking, and increases in carbon monoxide levels that are much higher than those typically observed from cigarette smoking, as previously published. Urinary excretion of NNAL and PAH biomarkers increased significantly following water pipe smoking. CONCLUSIONS: Absorption of nicotine in amounts comparable to cigarette smoking indicates a potential for addiction, and absorption of significant amounts of carcinogens raise concerns of cancer risk in people who smoke tobacco products in water pipes. IMPACT: Our data contribute to an understanding of the health impact of water pipe use. Descriptors Links Book Title Database Publisher AACR Data Source Authors Jacob,P.,3rd, Abu Raddaha,A.H., Dempsey,D., Havel,C., Peng,M., Yu,L., Benowitz,N.L. Original/Translated Title URL Date of Electronic 20110909 PMCID PMC3210932 Editors
Diversity of bacteria and yeast in the naturally fermented cotton seed and rice beverage produced by Brazilian Amerindians	2011	Departamento de Biologia, Universidade Federal de Lavras, Lavras, MG, Brazil.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Food Microbiology Periodical, Abbrev. Food Microbiol. Pub Date Free Form Oct Volume 28 Issue 7 Start Page 1380 Other Pages 1386 Notes LR: 20151119; CI: Copyright (c) 2011; JID: 8601127; 2011/01/07 [received]; 2011/06/11 [revised]; 2011/06/22 [accepted]; 2011/06/29 [aheadofprint]; ppublish Place of Publication England ISSN/ISBN 1095-9998; 0740-0020 Accession Number PMID: 21839389 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.fm.2011.06.012 [doi] Output Language Unknown(0) PMID 21839389 Abstract Microorganisms associated with the fermentation of cotton seed and rice were studied using a combination of culture-dependent and -independent methods. Samples of the cotton seed and rice beverage were collected every 8 h during the fermentation process for analysis of the microbiota present over 48 h. The lactic acid bacteria (LAB) population reached values of approximately 8.0 log cfu/mL. A total of 162 bacteria and 81 yeast isolates were identified using polyphasic methods. LAB (Lactobacillus plantarum, Lactobacillus vermiforme, Lactobacillus paracasei) were the most frequently isolated bacteria. Bacillus subtilis was present from 16 h until the end of the fermentation process. A decrease in pH value from 6.92 (0 h) to 4.76 (48 h) was observed, and the concentration of lactic acid reached 24 g/L at the end of the fermentation process. DGGE (denaturing gradient gel electrophoresis) was performed to determine the dynamics of the communities of bacteria and yeast, and the analysis revealed a predominance of LAB throughout the fermentation process. No changes were observed in the yeast community. The yeast species detected were Candida parapsilosis, Candida orthopsilosis, Clavispora lusitaniae and Rhodotorula mucilaginosa. Our studies indicate that the DGGE technique combined with a culture-dependent method is required to discern the dynamics in the fermentation of cotton seed and rice. Descriptors Links Book Title Database Publisher Elsevier Ltd Data Source Authors Ramos,C.L., de Almeida,E.G., Freire,A.L., Freitas Schwan,R. Original/Translated Title URL Date of Electronic 20110629 PMCID Editors
The relationship between venue indoor air quality and urinary cotinine levels among semiopen-air cafe employees: what factors determine the level of exposure?	2011	Laboratory of Physiology, School of Medicine, University of Athens, Greece.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of aerosol medicine and pulmonary drug delivery Periodical, Abbrev. J.Aerosol Med.Pulm.Drug Deliv. Pub Date Free Form Feb Volume 24 Issue 1 Start Page 35 Other Pages 41 Notes LR: 20131121; JID: 101475057; 0 (Particulate Matter); 0 (Tobacco Smoke Pollution); K5161X06LL (Cotinine); 2010/10/20 [aheadofprint]; ppublish Place of Publication United States ISSN/ISBN 1941-2703; 1941-2711 Accession Number PMID: 20961168 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; T DOI 10.1089/jamp.2010.0837 [doi] Output Language Unknown(0) PMID 20961168 Abstract BACKGROUND: Exposure to second-hand smoke (SHS) is increasingly recognized as an occupational hazard to workers in the service industry. In areas of the world with moderate climates, open windows and doors are assumed to provide a work environment with only marginally increased exposures to SHS. METHODS: We measured indoor fine particulate matter (PM2.5) in 50 semiopen air venues in Greece during the summer. Cotinine levels from a nonsmoking employee of each of these venues were measured from a postshift urine sample. RESULTS: In these semiopen-air venues, the mean level of indoor PM 2.5 levels were 113.5 +/- 72.3 mug/m(3). The mean postshift urinary cotinine levels of nonworking workers in these venues was 15 ng/mL. PM2.5 levels were strongly correlated with urinary cotinine concentrations (Spearman's r = 0.914). Linear regression analyses indicated that when taking into account the time of the measurement, the day of the week, for each 1 cigarette/100 m(3) the indoor PM2.5 concentrations increased by 26.6 mug/m(3) [95% confidence interval (CI): 7.6-45.7 mug/m(3), p = 0.007) and urinary cotinine levels of nonsmoking workers increased by 5.0 ng/mL (95% CI: 0.4 to 9.6, p = 0.034). CONCLUSIONS: In a sample of bars and restaurants with windows and doors open, indoor PM2.5 concentrations were elevated and increased proportionately to the density of smoking. Cotinine levels of nonsmoking employees increased with indoor PM2.5 concentrations, and also with the density of smoking. Open windows and doors do not protect workers from exposure to second-hand smoke. Descriptors Links Book Title Database Publisher Data Source Authors Karabela,M., Vardavas,C.I., Tzatzarakis,M., Tsatsakis,A., Dockery,D., Connolly,G.N., Behrakis,P. Original/Translated Title URL Date of Electronic 20101020 PMCID Editors
Air nicotine monitoring for second hand smoke exposure in public places in India	2011	Directorate General of Health Services, Ministry of Health and Family Welfare, Government of India, New Delhi, India.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Indian journal of community medicine : official publication of Indian Association of Preventive & Social Medicine Periodical, Abbrev. Indian.J.Community Med. Pub Date Free Form Apr Volume 36 Issue 2 Start Page 98 Other Pages 103 Notes LR: 20130529; JID: 9315574; OID: NLM: PMC3180954; OTO: NOTNLM; 2011/03/10 [received]; 2011/07/06 [accepted]; ppublish Place of Publication India ISSN/ISBN 1998-3581; 0970-0218 Accession Number PMID: 21976792 Language eng SubFile Journal Article DOI 10.4103/0970-0218.84126 [doi] Output Language Unknown(0) PMID 21976792 Abstract BACKGROUND: Air nicotine monitoring is an established method of measuring exposure to second hand smoke (SHS). Not much research has been done in India to measure air nicotine for the purpose of studying exposure to SHS. It is a risk factor and many diseases are known to occur among non smokers if they are exposed to second hand smoke. OBJECTIVE: To conduct monitoring of air nicotine for second hand smoke exposure in public places across major cities in India. MATERIALS AND METHODS: A cross sectional survey was conducted across four cities across the country, using passive air monitoring. The buildings included hospitals, secondary schools, Governmental offices, bars and restaurants. The buildings were selected through convenience sampling method keeping in view specific sentinel locations of interest. RESULT: The presence of air nicotine was recorded in most of the buildings under the study, which included government buildings, hospitals, schools, restaurants and entertainment venues (bars) in all four cities under the study. The highest median levels of air nicotine were found in entertainment venues and restaurants in cities. CONCLUSION: The presence of air nicotine in indoor public places indicates weak implementation of existing smoke free law in India. The findings of this study provide a baseline characterization of exposure to SHS in public places in India, which could be used to promote clean indoor air policies and programs and monitor and evaluate the progress and future smoke-free initiatives in India. Descriptors Links Book Title Database Publisher Data Source Authors Kaur,J., Prasad,V.M. Original/Translated Title URL Date of Electronic PMCID PMC3180954 Editors
Effects of environment and lifestyle on gastroesophageal reflux disease	2011	Portland VA Medical Center, Oregon Health & Science University, Portland, Oreg., USA. sonnenbe@ohsu.edu	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Digestive diseases (Basel, Switzerland) Periodical, Abbrev. Dig.Dis. Pub Date Free Form Volume 29 Issue 2 Start Page 229 Other Pages 234 Notes LR: 20130715; CI: Copyright (c) 2011; JID: 8701186; 2011/07/05 [aheadofprint]; ppublish Place of Publication Switzerland ISSN/ISBN 1421-9875; 0257-2753 Accession Number PMID: 21734389 Language eng SubFile Journal Article; Review; IM DOI 10.1159/000323927 [doi] Output Language Unknown(0) PMID 21734389 Abstract BACKGROUND: Gastroesophageal reflux disease (GERD) is comprised of a spectrum of related disorders, including hiatal hernia, reflux disease with its associated symptoms, erosive esophagitis, peptic stricture, Barrett's esophagus, and esophageal adenocarcinoma. Besides multiple pathophysiological associations among these disorders, they are also characterized by their comorbid occurrence in identical patients and by their similar epidemiologic behavior. The occurrence of GERD is shaped by marked temporal and geographic variations, suggesting the influence of environmental risk factors in the etiology of these diseases. VARIATIONS BY TIME, GEOGRAPHY, AND RACE: Between 1975 and 2005, the incidence of GERD and esophageal adenocarcinoma increased fivefold in most Western countries. The incidence of GERD also appears to be rising in the most developed countries of Asia. All severe forms of GERD, such as erosive esophagitis, peptic stricture, Barrett's metaplasia, and esophageal adenocarcinoma, are more common among whites than other ethnic groups. AFFLUENCE AND OBESITY AS RISK FACTORS: Barrett's esophagus and esophageal adenocarcinoma tend to occur slightly more often in subjects with higher income. Overweight and obesity contribute to the development of hiatal hernia, increase intra-abdominal pressure, and promote gastroesophageal reflux. Weight gain increases reflux symptoms, whereas weight loss decreases such symptoms. Other risk factors, such as smoking, alcohol, dietary fat, or drugs, play only a minor role in shaping the epidemiologic patterns of GERD. PROTECTION THROUGH HELICOBACTER PYLORI: On a population level, a high prevalence of H. pylori infection is likely to reduce levels of acid secretion and protect some carriers of the infection against reflux disease and its associated complications. Several studies have confirmed a lesser prevalence of H. pylori among subjects with than without GERD. Until recently, populations in Africa and Asia may have been protected against the development of GERD and esophageal adenocarcinoma by their higher prevalence of H. pylori infection. CONCLUSION: The study of environmental risk factors may provide an opportunity to better understand GERD and develop a means of its prevention. Descriptors Links Book Title Database Publisher S. Karger AG, Basel Data Source Authors Sonnenberg,A. Original/Translated Title URL Date of Electronic 20110705 PMCID Editors
Fine particle air pollution and secondhand smoke exposures and risks inside 66 US casinos	2011	Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, MA, USA. repace@comcast.net	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Environmental research Periodical, Abbrev. Environ.Res. Pub Date Free Form May Volume 111 Issue 4 Start Page 473 Other Pages 484 Notes CI: Copyright (c) 2011; JID: 0147621; 0 (Air Pollutants); 0 (Particulate Matter); 0 (Tobacco Smoke Pollution); 2010/04/28 [received]; 2011/02/07 [revised]; 2011/02/12 [accepted]; 2011/03/25 [aheadofprint]; ppublish Place of Publication United States ISSN/ISBN 1096-0953; 0013-9351 Accession Number PMID: 21440253 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.envres.2011.02.007 [doi] Output Language Unknown(0) PMID 21440253 Abstract Smoking bans often exempt casinos, exposing occupants to fine particles (PM(2.5)) from secondhand smoke. We quantified the relative contributions to PM(2.5) from both secondhand smoke and infiltrating outdoor sources in US casinos. We measured real-time PM(2.5), particulate polycyclic aromatic hydrocarbons (PPAH), and carbon dioxide (CO(2)) (as an index of ventilation rate) inside and outside 8 casinos in Reno, Nevada. We combined these data with data from previous studies, yielding a total of 66 US casinos with smoking in California, Delaware, Nevada, New Jersey, and Pennsylvania, developing PM(2.5) frequency distributions, with 3 nonsmoking casinos for comparison. Geometric means for PM(2.5) were 53.8 mug/m(3) (range 18.5-205 mug/m(3)) inside smoking casinos, 4.3 mug/m(3) (range 0.26-29.7 mug/m(3)) outside those casinos, and 3.1 mug/m(3) (range 0.6-9 mug/m(3)) inside 3 nonsmoking casinos. In a subset of 21 Reno and Las Vegas smoking casinos, PM(2.5) in gaming areas averaged 45.2 mug/m(3) (95% CI, 37.7-52.7 mug/m(3)); adjacent nonsmoking casino restaurants averaged 27.2 mug/m(3) (95% CI, 17.5-36.9 mug/m(3)), while PM(2.5) outside the casinos averaged 3.9 mug/m(3) (95% CI, 2.5-5.3 mug/m(3)). For a subset of 10 Nevada and Pennsylvania smoking casinos, incremental (indoor-outdoor) PM(2.5) was correlated with incremental PPAH (R(2)=0.79), with ventilation rate-adjusted smoker density (R(2)=0.73), and with smoker density (R(2)=0.60), but not with ventilation rates (R(2)=0.15). PPAH levels in 8 smoking casinos in 3 states averaged 4 times outdoors. The nonsmoking casinos' PM(2.5) (n=3) did not differ from outdoor levels, nor did their PPAH (n=2). Incremental PM(2.5) from secondhand smoke in approximately half the smoking casinos exceeded a level known to produce cardiovascular morbidity in nonsmokers after less than 2h of exposure, posing acute health risks to patrons and workers. Casino ventilation and air cleaning practices failed to control secondhand smoke PM(2.5). Drifting PM(2.5) from secondhand smoke contaminated unseparated nonsmoking areas. Smoke-free casinos reduced PM(2.5) to the same low levels found outdoors. Descriptors Links Book Title Database Publisher Elsevier Inc Data Source Authors Repace,J.L., Jiang,R.T., Acevedo-Bolton,V., Cheng,K.C., Klepeis,N.E., Ott,W.R., Hildemann,L.M. Original/Translated Title URL Date of Electronic 20110325 PMCID Editors
Development of multiwalled carbon nanotubes based micro-solid-phase extraction for the determination of trace levels of sixteen polycyclic aromatic hydrocarbons in environmental water samples	2011	Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of chromatography.A Periodical, Abbrev. J.Chromatogr.A Pub Date Free Form 30-Dec Volume 1218 Issue 52 Start Page 9321 Other Pages 9327 Notes CI: Copyright (c) 2011; JID: 9318488; 0 (Nanotubes, Carbon); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); 2011/06/15 [received]; 2011/10/11 [revised]; 2011/10/28 [accepted]; 2011/11/03 [aheadofprint]; ppublish Place of Publication Netherlands ISSN/ISBN 1873-3778; 0021-9673 Accession Number PMID: 22099227 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.chroma.2011.10.066 [doi] Output Language Unknown(0) PMID 22099227 Abstract Micro-solid-phase extraction (mu-SPE) was developed for the determination of trace level of 16 United States Environmental Protection Agency priority polycyclic aromatic hydrocarbons (PAHs) in river water samples with gas chromatography-mass spectrometry (GC-MS). In the mu-SPE device, multiwalled carbon nanotubes was employed as sorbent and was packed inside an porous polypropylene membrane "envelope" whose edges were heat-sealed to secure the contents. The mu-SPE device was placed in a stirred sample solution to extract the analytes. The porous polypropylene membrane envelope in mu-SPE device acts as a filter to exclude potential interferences, such as eliminating or reducing the influence of particles that are bigger than the pore size. After extraction, analyte desorption was carried out with a suitable organic solvent under ultrasonication. Important extraction parameters were optimized in detail, including the selection and amount of sorbent materials, the extraction temperature and extraction time, desorption solvent and desorption time, amount of organic modifier, agitation speed and sample ionic strength. Under the developed extraction conditions, the proposed method provided good linearity in the range of 0.1-50 mug/L, low limits of detection (4.2-46.5 ng/L), and good repeatability of the extractions (relative standard deviations, Descriptors Links Book Title Database Publisher Elsevier B.V Data Source Authors Guo,L., Lee,H.K. Original/Translated Title URL Date of Electronic 20111103 PMCID Editors

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