WTS database

Title	Pub Year Sort ascending	Author	SearchLink
Removal of MS2, Qbeta and GA bacteriophages during drinking water treatment at pilot scale	2012	Veolia Environment Research and Innovation, Chemin de la Digue, BP76, 78608 Maisons-Laffitte Cedex, France. nicolas.boudaud@veolia.com	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Water research Periodical, Abbrev. Water Res. Pub Date Free Form 15-May Volume 46 Issue 8 Start Page 2651 Other Pages 2664 Notes LR: 20131121; CI: Copyright (c) 2012; JID: 0105072; 0 (Drinking Water); 0 (Membranes, Artificial); 0 (Solutions); 4R7X1O2820 (Chlorine); 2011/03/01 [received]; 2012/01/27 [revised]; 2012/02/11 [accepted]; 2012/03/03 [aheadofprint]; ppublish Place of Publication England ISSN/ISBN 1879-2448; 0043-1354 Accession Number PMID: 22421032 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.watres.2012.02.020 [doi] Output Language Unknown(0) PMID 22421032 Abstract The removal of MS2, Qbeta and GA, F-specific RNA bacteriophages, potential surrogates for pathogenic waterborne viruses, was investigated during a conventional drinking water treatment at pilot scale by using river water, artificially and independently spiked with these bacteriophages. The objective of this work is to develop a standard system for assessing the effectiveness of drinking water plants with respect to the removal of MS2, Qbeta and GA bacteriophages by a conventional pre-treatment process (coagulation-flocculation-settling-sand filtration) followed or not by an ultrafiltration (UF) membrane (complete treatment process). The specific performances of three UF membranes alone were assessed by using (i) pre-treated water and (ii) 0.1 mM sterile phosphate buffer solution (PBS), spiked with bacteriophages. These UF membranes tested in this work were designed for drinking water treatment market and were also selected for research purpose. The hypothesis serving as base for this study was that the interfacial properties for these three bacteriophages, in terms of electrostatic charge and the degree of hydrophobicity, could induce variations in the removal performances achieved by drinking water treatments. The comparison of the results showed a similar behaviour for both MS2 and Qbeta surrogates whereas it was particularly atypical for the GA surrogate. The infectious character of MS2 and Qbeta bacteriophages was mostly removed after clarification followed by sand filtration processes (more than a 4.8-log reduction) while genomic copies were removed at more than a 4.0-log after the complete treatment process. On the contrary, GA bacteriophage was only slightly removed by clarification followed by sand filtration, with less than 1.7-log and 1.2-log reduction, respectively. After the complete treatment process achieved, GA bacteriophage was removed with less than 2.2-log and 1.6-log reduction, respectively. The effectiveness of the three UF membranes tested in terms of bacteriophages removal showed significant differences, especially for GA bacteriophage. These results could provide recommendations for drinking water suppliers in terms of selection criteria for membranes. MS2 bacteriophage is widely used as a surrogate for pathogenic waterborne viruses in Europe and the United States. In this study, the choice of MS2 bacteriophage as the best surrogate to be used for assessment of the effectiveness of drinking water treatment in removal of pathogenic waterborne viruses in worst conditions is clearly challenged. It was shown that GA bacteriophage is potentially a better surrogate as a worst case than MS2. Considering GA bacteriophage as the best surrogate in this study, a chlorine disinfection step could guaranteed a complete removal of this model and ensure the safety character of drinking water plants. Descriptors Links Book Title Database Publisher Elsevier Ltd Data Source Authors Boudaud,N., Machinal,C., David,F., Freval-Le Bourdonnec,A., Jossent,J., Bakanga,F., Arnal,C., Jaffrezic,M.P., Oberti,S., Gantzer,C. Original/Translated Title URL Date of Electronic 20120303 PMCID Editors
Alcohol intake and tobacco smoking among students of medical schools	2012	Katedra i Zaklad Medycyny Rodzinnej Akademii Medycznej we Wroclawiu. dkurpas@hotmail.com	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Przeglad lekarski Periodical, Abbrev. Przegl.Lek. Pub Date Free Form Volume 69 Issue 10 Start Page 893 Other Pages 895 Notes LR: 20151119; JID: 19840720R; 3K9958V90M (Ethanol); ppublish Place of Publication Poland ISSN/ISBN 0033-2240; 0033-2240 Accession Number PMID: 23421054 Language pol SubFile English Abstract; Journal Article; IM DOI Output Language Unknown(0) PMID 23421054 Abstract PURPOSE OF THE STUDY: To determine the level of alcohol intake (including risky drinking) and tobacco smoking among students of higher medical schools, as well as the level of students' knowledge about epidemiology and consequences of alcohol abuse. MATERIAL AND METHODS: The study was conducted in 2010-2012 and involved 1054 students of medical school. The majority of the participants were female (82.3%). Average age of respondents was 25.13 years (SD = 6.64, median = 24). The questionnaire was to determine the students' knowledge of alcohol abuse, short version of AUDIT and questions about tobacco smoking. RESULTS: The average 100% alcohol intake in Poland was correctly identified by 32.0% (318) of students. The alcohol level in blood which indicates the state after alcohol intake was correctly determined by 57.2% (571) of respondents. Tobacco was the choice of 13.8% (138) of students as the main health risk factor and cause of premature deaths in Europe, alcohol was chosen by 17.8% (177). Cirrhosis was recognized correctly by 52% of students (521) as the most frequent disease caused by alcohol in European men. Regarding the question about the biochemical indicators helpful in diagnostics of alcohol abuse only 27.6% (275) indicated correctly: MCV and GGT. In short version of AUDIT 32.2% (238) of women gained 4 points and above, 56.2% (91) of men gained 5 points and above. Among women: 3.5% (28) have 14 and above standardized portions of an alcoholic drinks during week. Among men: 6.5% (11) have 28 and above standardized portions of an alcoholic drinks during week. Non-smokers represent 20.6% (205) of respondents. A majority (39.4%, 82) indicate they smoke not more than 5 cigarettes per day. The students first began smoking in secondary (21.7%, 45) and high school (45.9%, 95). Smokers statistically significantly more often (p Descriptors Links Book Title Database Publisher Data Source Authors Kurpas,D., Mroczek,B., Bielska,D., Wojtal,M., Sen,M., Steciwko,A. Original/Translated Title Spozycie alkoholu i palenie tytoniu wsrod studentow wyzszych uczelni medycznych URL Date of Electronic PMCID Editors
Cigarette smoking knowledge and perceptions among students in four Italian medical schools	2012	Department of Physiology and Pharmacology V. Erspamer, Sapienza University of Rome, 5, Piazzale Aldo Moro, 00161 Rome, Italy. caterina.grassi@uniroma1.it	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco Periodical, Abbrev. Nicotine Tob.Res. Pub Date Free Form Sep Volume 14 Issue 9 Start Page 1065 Other Pages 1072 Notes LR: 20151119; JID: 9815751; 2012/02/17 [aheadofprint]; ppublish Place of Publication England ISSN/ISBN 1469-994X; 1462-2203 Accession Number PMID: 22345319 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1093/ntr/ntr330 [doi] Output Language Unknown(0) PMID 22345319 Abstract INTRODUCTION: Tobacco smoking is the leading cause of premature death in the developed world. Advice and assistance by physicians help smokers quit, but little attention has been paid to the topic of tobacco dependence in the curricula of Italian medical schools. Consequently, few physicians follow the clinical practice guidelines for treating dependence. METHODS: This study was conducted on 439 students at 4 Italian medical schools in 2010. Students were asked to complete a 60-item questionnaire. Two scores were computed: Score 1 assessed knowledge of the epidemiology of smoking, risks associated with smoking, and benefits of cessation. Score 2 assessed knowledge of tobacco dependence treatment guidelines and the effectiveness of treatments. A score of less than 60% indicated insufficient knowledge. RESULTS: Medical students had limited knowledge of the epidemiology of smoking, attributable morbidity and mortality, and the benefits of cessation. This limited knowledge was reflected by the finding that 70% of students had a total Score 1 less than 60% of available points. Knowledge of clinical guidelines, perceived competence in counseling smokers, and treatment of addiction was also insufficient, as 76% of students achieved a total Score 2 of less than 60%. CONCLUSIONS: Our data demonstrate that Italian medical students have limited knowledge about tobacco dependence, how to treat it, and the critical role of the physician in promoting cessation. Taken together with research from other countries, these findings suggest that medical schools do not offer adequate training in tobacco dependence and provide a rationale for modifying the core curriculum to include more information on tobacco dependence treatment. Descriptors Links Book Title Database Publisher Data Source Authors Grassi,M.C., Chiamulera,C., Baraldo,M., Culasso,F., Ferketich,A.K., Raupach,T., Patrono,C., Nencini,P. Original/Translated Title URL Date of Electronic 20120217 PMCID Editors
Waterpipe smoking among college students in the United States: a review of the literature	2012	Department of Psychology, Wayne State University, Detroit, MI 48202, USA. grekine@wayne.edu	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of American college health : J of ACH Periodical, Abbrev. J.Am.Coll.Health Pub Date Free Form Volume 60 Issue 3 Start Page 244 Other Pages 249 Notes JID: 8214119; ppublish Place of Publication United States ISSN/ISBN 1940-3208; 0744-8481 Accession Number PMID: 22420702 Language eng SubFile Journal Article; Review; IM DOI 10.1080/07448481.2011.589419 [doi] Output Language Unknown(0) PMID 22420702 Abstract OBJECTIVE: To review the literature on college student waterpipe use with a focus on undergraduates in the United States. PARTICIPANTS: Undergraduate students. METHODS: Studies were accessed using the databases PubMed, MEDLINE, PsycINFO, and Academic Search Premier. Searches included combinations of the following keywords: "waterpipe," "hookah," "shisha," "nargila," "argileh," "hubble bubble," "college," "university," and "student." RESULTS: Results demonstrate that approximately 1 in 5 American college students report past-year waterpipe use. Results also suggest that there are a number of established correlates of waterpipe smoking, including male gender, Arab ethnicity, cigarette smoking, and the belief that waterpipe smoking is less harmful than cigarette smoking. CONCLUSIONS: Despite its harmful health effects, waterpipe smoking is quite common among college students. Future research with better methodologies and theoretical frameworks are needed to advance the field. Descriptors Links Book Title Database Publisher Data Source Authors Grekin,E.R., Ayna,D. Original/Translated Title URL Date of Electronic PMCID Editors
The associations of asthma symptoms with active and passive smoking in Hong Kong adolescents	2012	Department of Community Medicine and School of Public Health, Faculty of Medicine, University of Hong Kong, Pokfulam, Hong Kong, China. kkmak@graduate.hku.hk	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Respiratory care Periodical, Abbrev. Respir.Care Pub Date Free Form Sep Volume 57 Issue 9 Start Page 1398 Other Pages 1404 Notes CI: Copyright 2012; JID: 7510357; 0 (Tobacco Smoke Pollution); CIN: Respir Care. 2012 Sep;57(9):1528-9. PMID: 22943156; 2012/02/17 [aheadofprint]; ppublish Place of Publication United States ISSN/ISBN 0020-1324; 0020-1324 Accession Number PMID: 22348876 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.4187/respcare.01548 [doi] Output Language Unknown(0) PMID 22348876 Abstract BACKGROUND: Tobacco smoke has detrimental effects on the respiratory system. This study investigated the associations of active and passive smoking with asthma symptoms in Hong Kong adolescents. METHODS: A total of 6,494 Hong Kong secondary school students, with a mean +/- SD age of 15.0 +/- 1.21 years, participated in the Health Related Behavior General Survey in 2000-2001. They reported their demographic factors (sex, age, housing type, district of living), lifestyles (smoking, drinking, extracurricular sports, eating), and asthma symptoms (exercise-induced bronchospasm [EIB] and nocturnal cough) in the questionnaire. In addition, number of smoking parents (none/one/both) and presence of a smoking best friend (yes/no) were assessed. Logistic regression models were used to determine the odds ratios (OR) of frequently having the asthma symptoms for different smoking status of students, parents, and best friend, with adjustment for demographic factors and lifestyles. RESULTS: The prevalence of former, light, and heavy smokers was 17.5%, 7.7%, and 1.0%, respectively. Moreover, 35.1% of the participants had one and 3.8% had 2 parents who smoked. Heavy smokers were more likely to experience EIB with OR (95% CI) of 2.27 (1.30-3.97) and nocturnal cough with OR (95% CI) of 3.45 (1.52-7.81), as well as both symptoms with OR (95% CI) = 4.69 (1.88-11.73) when compared to those who never smoked. The corresponding OR (95% CI) for having at least one smoking parent and a smoking best friend was 1.45 (1.17-1.81), 1.61 (1.06-2.42), and 2.43 (1.37-4.31), when compared with those without a parent or best friend who smoked. CONCLUSIONS: Adolescents who are heavy smokers and having parents and a best friend who smoke are more likely than others to have asthma symptoms. Both active and passive smoking are related to asthma symptoms in adolescents. Descriptors Links Book Title Database Publisher Daedalus Enterprises Data Source Authors Mak,K.K., Ho,R.C., Day,J.R. Original/Translated Title URL Date of Electronic 20120217 PMCID Editors
Influence of smoking on interleukin-1beta level, oxidant status and antioxidant status in gingival crevicular fluid from chronic periodontitis patients before and after periodontal treatment	2012	Department of Periodontology, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey. tokerhulya@gmail.com	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of periodontal research Periodical, Abbrev. J.Periodontal.Res. Pub Date Free Form Oct Volume 47 Issue 5 Start Page 572 Other Pages 577 Notes LR: 20151119; CI: (c) 2012; JID: 0055107; 0 (Antioxidants); 0 (Benzothiazoles); 0 (Chromogenic Compounds); 0 (Fluorescent Dyes); 0 (Indicators and Reagents); 0 (Interleukin-1beta); 0 (Oxidants); 0 (Phenols); 0 (Sulfonic Acids); 0 (Sulfoxides); 28752-68-3 Place of Publication United States ISSN/ISBN 1600-0765; 0022-3484 Accession Number PMID: 22364664 Language eng SubFile Comparative Study; Journal Article; D; IM DOI 10.1111/j.1600-0765.2012.01468.x [doi] Output Language Unknown(0) PMID 22364664 Abstract BACKGROUND AND OBJECTIVE: The aim of this study was to evaluate the impact of smoking on the relationship between interleukin-1 (IL-1beta) and oxidation in patients with periodontitis and response to nonsurgical periodontal therapy. MATERIAL AND METHODS: Data were obtained from 30 patients with generalized chronic periodontitis (15 smokers and 15 nonsmokers) and from 10 periodontally healthy controls. IL-1beta level, total oxidant status (TOS) and total antioxidant status (TAS) were recorded in gingival crevicular fluid. Probing depth, clinical attachment level, gingival and plaque indices and bleeding on probing were also measured. The gingival crevicular fluid and clinical parameters were recorded at baseline and 6 wk after periodontal treatment. RESULTS: The study showed statistically significant improvement of clinical parameters in both smokers and nonsmokers after periodontal treatment. Moreover, the baseline IL-1beta levels were significantly higher in smokers compared with nonsmokers (p Descriptors Links Book Title Database Publisher John Wiley & Sons A/S Data Source Authors Toker,H., Akpinar,A., Aydin,H., Poyraz,O. Original/Translated Title URL Date of Electronic 20120227 PMCID Editors
Normal values and influencing factors of fractional exhaled nitric oxide for Chinese healthy adults	2012	China-Japan Friendship Hospital, Beijing, China.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Zhonghua yi xue za zhi Periodical, Abbrev. Zhonghua Yi Xue Za Zhi Pub Date Free Form 24-Jul Volume 92 Issue 28 Start Page 1971 Other Pages 1973 Notes LR: 20131121; JID: 7511141; 31C4KY9ESH (Nitric Oxide); ppublish Place of Publication China ISSN/ISBN 0376-2491; 0376-2491 Accession Number PMID: 22944271 Language chi SubFile English Abstract; Journal Article; IM DOI Output Language Unknown(0) PMID 22944271 Abstract OBJECTIVE: To evaluate the normal values of fractional exhaled nitric oxide (FENO) for Chinese adults. METHODS: A total of 200 non-smoking and healthy Chinese adults were recruited according to the inclusion and exclusion criteria. They received lung function and allergen skin prick tests at the Outpatient Department of China-Japan Friendship Hospital from February to August 2011. There were 100 males and 100 females. FENO test was performed according to the standard procedures of American Thoracic Society/European Respiratory Society (ATS/ERS) recommendation. The FENO levels of healthy non-smokers were tested by the NIOXMINO analyzer. All variables, such as age, gender, height, weight, forced expiratory volume at 1 second (FEV(1))% predicted and FEV(1)/FVC, were included for multiple regression analyses. RESULTS: The FENO level of healthy non-smokers was (14.2 +/- 5.6)x10(-9) mol/L with the 95% normal range of (3.2 - 25.2)x10(-9) mol/L. The value of FENO was significantly higher in males than females ((15.6 +/- 5.5) vs (12.9 +/- 5.4)x10(-9) mol/L, t = 3.48, P = 0.001). The FENO level of the subjects aged 60 - 80 years was (15.7 +/- 5.4)x10(-9) mol/L and it was higher than those aged 18 - 60 years ((13.8 +/- 5.6)x10(-9) mol/L, t = 2.04, P = 0.040). Multiple regression analysis showed that gender was an independent influencing factor of FENO level. CONCLUSIONS: The FENO level of non-smoking and healthy Chinese adults is similar with that of the westerners. Gender is an independent influencing factor of FENO level. Descriptors Links Book Title Database Publisher Data Source Authors Zhang,Y.M., Lin,J.T. Original/Translated Title URL Date of Electronic PMCID Editors
The combined effect of very low nicotine content cigarettes, used as an adjunct to usual Quitline care (nicotine replacement therapy and behavioural support), on smoking cessation: a randomized controlled trial	2012	Clinical Trials Research Unit, School of Population Health, The University of Auckland, Auckland, New Zealand. n.walker@ctru.auckland.ac.nz	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Addiction (Abingdon, England) Periodical, Abbrev. Addiction Pub Date Free Form Oct Volume 107 Issue 10 Start Page 1857 Other Pages 1867 Notes LR: 20151119; CI: (c) 2012; JID: 9304118; 0 (Nicotinic Agonists); 6M3C89ZY6R (Nicotine); CIN: Evid Based Nurs. 2014 Jan;17(1):19-20. PMID: 23474750; 2012/05/17 [aheadofprint]; ppublish Place of Publication England ISSN/ISBN 1360-0443; 0965-2140 Accession Number PMID: 22594651 Language eng SubFile Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't; IM DOI 10.1111/j.1360-0443.2012.03906.x [doi] Output Language Unknown(0) PMID 22594651 Abstract AIM: To determine the combined effect of very low nicotine content (VLNC) cigarettes and usual Quitline care [nicotine replacement therapy (NRT) and behavioural support] on smoking abstinence, in smokers motivated to quit. DESIGN: Single-blind, parallel randomized trial. SETTING: New Zealand. PARTICIPANTS Smokers who called the Quitline for quitting support were randomized to either VLNC cigarettes to use whenever they had an urge to smoke for up to 6 weeks after their quit date, in combination with usual Quitline care (8 weeks of NRT patches and/or gum or lozenges, plus behavioural support) or to usual Quitline care alone. MEASUREMENTS: The primary outcome was 7-day point-prevalence smoking abstinence 6 months after quit day. Secondary outcomes included continuous abstinence, cigarette consumption, withdrawal, self-efficacy, alcohol use, serious adverse events and views on the use of the VLNC cigarettes at 3 and 6 weeks and 3 and 6 months. FINDINGS: A total of 1410 participants were randomized (705 in each arm), with a 24% loss to follow-up at 6 months. Participants in the intervention group were more likely to have quit smoking at 6 months compared to the usual care group [7-day point-prevalence abstinence 33 versus 28%, relative risk (RR) = 1.18, 95% confidence interval (CI): 1.01, 1.39, P = 0.037; continuous abstinence 23 versus 15%, RR = 1.50, 95% CI: 1.20, 1.87, P = 0.0003]. The median time to relapse in the intervention group was 2 months compared to 2 weeks in the usual care group (P Descriptors Links Book Title Database Publisher Auckland Uni Services Ltd Data Source Authors Walker,N., Howe,C., Bullen,C., Grigg,M., Glover,M., McRobbie,H., Laugesen,M., Parag,V., Whittaker,R. Original/Translated Title URL Date of Electronic 20120517 PMCID Editors
Risks factors for recurrent neurological decompression sickness in recreational divers: a case-control study	2012	Department of Hyperbaric and Diving Medicine, Sainte Anne's Military Hospital, Toulon, France. gempp@voila.fr	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full The Journal of sports medicine and physical fitness Periodical, Abbrev. J.Sports Med.Phys.Fitness Pub Date Free Form Oct Volume 52 Issue 5 Start Page 530 Other Pages 536 Notes JID: 0376337; ppublish Place of Publication Italy ISSN/ISBN 0022-4707; 0022-4707 Accession Number PMID: 22976740 Language eng SubFile Journal Article; IM DOI R40123675 [pii] Output Language Unknown(0) PMID 22976740 Abstract AIM: Individual or environmental factors that predispose to the recurrence of neurological decompression sickness (DCS) in scuba divers are not known and preventive measures designed to mitigate the risk of a subsequent episode remain empirical. The aim of this controlled study was to examine some potential risk factors predictive of recurrent DCS event that may lead to practical recommendations for divers who wish to continue diving after an initial episode. METHODS: Age, gender, diving experience, presence of a large right-to-left shunt (RLS) and diving practice following post-DCS resumption were evaluated as potential predictors of a further DCS in recreational divers admitted in our hyperbaric facility over a period of 12 years. RESULTS: Twenty-four recurrent cases and 50 divers treated for a single DCS episode which continued diving were recruited after review of medical forms and follow-up interview by telephone. After controlling for potential confounding variables between groups, multivariate analysis revealed that experienced divers (OR, 3.8; 95%CI, 1.1-14; P=0.03), the presence of large RLS (OR, 5.4; 95%CI, 1.5-19.7; P=0.006) and the lack of changes in the way of diving after prior DCS (OR, 8.4; 95%CI, 2.3-31.1; P=0.001) were independently associated with a repeated episode. CONCLUSION: The findings highlight the importance for divers to adopt conservative dives profiles or to use preferentially oxygen-enriched breathing mixtures after an initial DCS. Closure of a documented RLS through a large patent foramen ovale as a secondary preventive procedure for individuals that cannot adapt their diving practice remains debatable. Descriptors Links Book Title Database Publisher Data Source Authors Gempp,E., Louge,P., Blatteau,J.E., Hugon,M. Original/Translated Title URL Date of Electronic PMCID Editors
Ground-level ozone differentially affects nitrogen acquisition and allocation in mature European beech (Fagus sylvatica) and Norway spruce (Picea abies) trees	2012	Ecophysiology of Plants, Department of Ecology and Ecosystem Management, Technische Universitat Munchen, 85354 Freising, Germany. weigt@wzw.tum.de	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Tree physiology Periodical, Abbrev. Tree Physiol. Pub Date Free Form Oct Volume 32 Issue 10 Start Page 1259 Other Pages 1273 Notes LR: 20131121; JID: 100955338; 0 (Nitrogen Isotopes); 0 (Soil); 059QF0KO0R (Water); 66H7ZZK23N (Ozone); N762921K75 (Nitrogen); 2012/10/05 [aheadofprint]; ppublish Place of Publication Canada ISSN/ISBN 1758-4469; 0829-318X Accession Number PMID: 23042769 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1093/treephys/tps087 [doi] Output Language Unknown(0) PMID 23042769 Abstract Impacts of elevated ground-level ozone (O(3)) on nitrogen (N) uptake and allocation were studied on mature European beech (Fagus sylvatica L.) and Norway spruce (Picea abies [L.] Karst.) in a forest stand, hypothesizing that: (i) chronically elevated O(3) limits nutrient uptake, and (ii) beech responds more sensitively to elevated O(3) than spruce, as previously found for juvenile trees. Tree canopies were exposed to twice-ambient O(3) concentrations (2 x O(3)) by a free-air fumigation system, with trees under ambient O(3) serving as control. After 5 years of O(3) fumigation, (15)NH(4)(15)NO(3) was applied to soil, and concentrations of newly acquired N (N(labelled)) and total N (N(total)) in plant compartments and soil measured. Under 2 x O(3), N(labelled) and N(total) were increased in the bulk soil and tended to be lower in fine and coarse roots of both species across the soil horizons, supporting hypothesis (i). N(labelled) was reduced in beech foliage by up to 60%, and by up to 50% in buds under 2 x O(3). Similarly, N(labelled) in stem bark and phloem was reduced. No such reduction was observed in spruce, reflecting a stronger effect on N acquisition in beech in accordance with hypothesis (ii). In spruce, 2 x O(3) tended to favour allocation of new N to foliage. N(labelled) in beech foliage correlated with cumulative seasonal transpiration, indicating impaired N acquisition was probably caused by reduced stomatal conductance and, hence, water transport under elevated O(3). Stimulated fine root growth under 2 x O(3) with a possible increase of below-ground N sink strength may also have accounted for lowered N allocation to above-ground organs. Reduced N uptake and altered allocation may enhance the use of stored N for growth, possibly affecting long-term stand nutrition. Descriptors Links Book Title Database Publisher Data Source Authors Weigt,R.B., Haberle,K.H., Millard,P., Metzger,U., Ritter,W., Blaschke,H., Gottlein,A., Matyssek,R. Original/Translated Title URL Date of Electronic 20121005 PMCID Editors

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