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Investigation of sludge re-circulating clarifiers design and optimization through numerical simulation 2004 Davari, S., Niroo Research Institute, Shahrak Ghods, Tehran 14686, Iran
Source Type
Print(0)
Ref Type
Generic
Periodical, Full
Water Science and Technology
Periodical, Abbrev.
Water Sci. Technol.
Pub Date Free Form
2004/
Volume
48
Issue
12-Nov
Start Page
293
Other Pages
298
Notes
Place of Publication
ISSN/ISBN
0273-1223
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
In steam thermal power plants (TPP) with open re-circulating wet cooling towers, elimination of water hardness and suspended solids (SS) is performed in clarifiers. Most of these clarifiers are of high efficiency sludge re-circulating type (SRC) with capacity between 500-1,500 m3/hr. Improper design and/or mal-operation of clarifiers in TPPs results in working conditions below design capacity or production of soft water with improper quality (hardness and S.S.). This causes accumulation of deposits in heat exchangers, condenser tubes, cooling and service water pipes and boiler tubes as well as increasing the ionic load of water at the demineralizing system inlet. It also increases the amount of chemical consumptions and produces more liquid and solid waste. In this regard, a software program for optimal design and simulation of SRCs has been developed. Then design parameters of existing SRCs in four TPPs in Iran were used as inputs to developed software program and resulting technical specifications were compared with existing ones. In some cases improper design was the main cause of poor outlet water quality. In order to achieve proper efficiency, further investigations were made to obtain control parameters as well as design parameters for both mal-designed and/or mal-operated SRCs.
Descriptors
water, analytical parameters, chemical composition, computer program, conference paper, controlled study, cooling tower, devices, electric power plant, heat exchange, Iran, mathematical analysis, process control, process design, process monitoring, process optimization, simulation, sludge clarification, suspended particulate matter, water hardness, water quality
Links
Book Title
Database
Embase; MEDLINE
Publisher
Data Source
Embase
Authors
Davari,S., Lichayee,M. J.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Benzene, toluene and xylene (BTX) pollution in ambient air: a case study 2004 National Envrionmental Engineering Research Institute, Nagpur.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of environmental science & engineering
Periodical, Abbrev.
J.Environ.Sci.Eng.
Pub Date Free Form
Jan
Volume
46
Issue
1
Start Page
15
Other Pages
20
Notes
LR: 20131121; JID: 101273917; 0 (Air Pollutants); 0 (Vehicle Emissions); 0 (Xylenes); 3FPU23BG52 (Toluene); J64922108F (Benzene); ppublish
Place of Publication
India
ISSN/ISBN
Accession Number
PMID: 16649588
Language
eng
SubFile
Journal Article; IM
DOI
Output Language
Unknown(0)
PMID
16649588
Abstract
Volatile Organic Compounds (VOCs) in presence of sunlight and oxides of nitrogen in atmosphere are considered as precursors for ozone production at the ground level. Concentration of Benzene, Toluene and Xylene (BTX) in ambient air was measured near seven traffic junctions in the city of Nagpur. Air samples were collected using Organic Vapour Sampler and analyzed by Gas Chromatograph equipped with Flame Ionization Detector (FID). Benzene concentration was found to be in the range 9.3 to 28.7 microg/m3, Toluene 3.26 to 21.0 microg/m3 and Xylene 4.9 to 15.0 microg/m3. These values are lower than those found in Metropolitan cities like Mumbai.
Descriptors
Air Pollutants/analysis, Air Pollution/analysis, Benzene/analysis, Cities, Environmental Monitoring, India, Toluene/analysis, Vehicle Emissions, Xylenes/analysis
Links
Book Title
Database
Publisher
Data Source
Authors
Deole,S., Phadke,K. M., Kumar,A.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
The measurement of exhaled carbon monoxide in healthy smokers and non-smokers 2004 Department of Public Health, Medical Faculty of Firat University, Elazig 23119, Turkey. drfigen@hotmail.com
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Respiratory medicine
Periodical, Abbrev.
Respir.Med.
Pub Date Free Form
Jun
Volume
98
Issue
6
Start Page
551
Other Pages
556
Notes
LR: 20131121; JID: 8908438; 0 (Smoke); 0 (Tobacco Smoke Pollution); 7U1EE4V452 (Carbon Monoxide); ppublish
Place of Publication
England
ISSN/ISBN
0954-6111; 0954-6111
Accession Number
PMID: 15191041
Language
eng
SubFile
Comparative Study; Journal Article; IM
DOI
Output Language
Unknown(0)
PMID
15191041
Abstract
The measurement of exhaled carbon monoxide (CO) level may provide an immediate, non-invasive method of assessing smoking status. The aims of this study were to use a portable CO monitor to compare the exhaled CO levels in established smokers and non-smokers. The exhaled CO levels were measured in 322 subjects (243 healthy smokers, 55 healthy non-smokers, 24 passive smokers) who applied to healthy stand during the spring student activity of Firat University in Elazig. Exhaled CO concentration was measured using the EC50 Smokerlyser. The mean exhaled CO level was 17.13+/-8.50 parts per million (ppm) for healthy smokers and 3.61+/-2.15 ppm for healthy non-smokers, and 5.20+/-3.38 ppm for passive smokers. There were significant positive correlation between CO levels and daily cigarette consumption, and CO levels and duration of smoking in healthy smokers (r=+0.550, P<0.001, r=+0.265, P<0.001, respectively. Spearman's test). When smokers and non-smokers were looked at as a whole, a cutoff of 6.5 ppm had a sensitivity of 90% and specificity of 83%. In conclusion, exhaled CO level provides an easy, an immediate way of assessing a subject's smoking status.
Descriptors
Adult, Analysis of Variance, Breath Tests, Carbon Monoxide/analysis, Female, Humans, Male, Smoke/analysis, Smoking/metabolism, Tobacco Smoke Pollution/analysis
Links
Book Title
Database
Publisher
Data Source
Authors
Deveci,S. E., Deveci,F., Acik,Y., Ozan,A. T.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
In vitro pharmacodynamic characteristics of amphotericin B, caspofungin, fluconazole, and voriconazole against bloodstream isolates of infrequent Candida species from patients with hematologic malignancies 2004 Center of Excellence on Aging, Room 27, 5th level, "G. D'Annunzio" University, Via Colle dell'Ara, 66100 Chieti, Italy.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Antimicrobial Agents and Chemotherapy
Periodical, Abbrev.
Antimicrob.Agents Chemother.
Pub Date Free Form
Nov
Volume
48
Issue
11
Start Page
4453
Other Pages
4456
Notes
LR: 20141120; JID: 0315061; 0 (Antifungal Agents); 0 (Echinocandins); 0 (Peptides, Cyclic); 0 (Pyrimidines); 0 (Triazoles); 7XU7A7DROE (Amphotericin B); 8VZV102JFY (Fluconazole); F0XDI6ZL63 (caspofungin); JFU09I87TR (Voriconazole); OID: NLM: PMC525414; pp
Place of Publication
United States
ISSN/ISBN
0066-4804; 0066-4804
Accession Number
PMID: 15504881
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
48/11/4453 [pii]
Output Language
Unknown(0)
PMID
15504881
Abstract
Time-kill and postantifungal effect (PAFE) of amphotericin B, caspofungin, fluconazole, and voriconazole were determined against clinical isolates of Candida guilliermondii, Candida kefyr, and Candida lusitaniae. Azoles displayed fungistatic activity and no measurable PAFE, regardless of the concentration tested. Amphotericin B and caspofungin demonstrated concentration-dependent fungicidal activity, although amphotericin B only produced a significant dose-dependent PAFE against all isolates tested.
Descriptors
Amphotericin B/pharmacology, Antifungal Agents/pharmacology, Candida/drug effects, Candidiasis/complications/microbiology, Colony Count, Microbial, Echinocandins, Fluconazole/pharmacology, Hematologic Neoplasms/complications, Humans, Kinetics, Microbial Sensitivity Tests, Models, Biological, Peptides, Cyclic/pharmacology, Pyrimidines/pharmacology, Triazoles/pharmacology, Voriconazole
Links
Book Title
Database
Publisher
Data Source
Authors
Di Bonaventura,G., Spedicato,I., Picciani,C., D'Antonio,D., Piccolomini,R.
Original/Translated Title
URL
Date of Electronic
PMCID
PMC525414
Editors
Trichloroacetic acid cycling in Sitka spruce saplings and effects on sapling health following long term exposure 2004 Heal, M.R., School of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, United Kingdom
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Environmental Pollution
Periodical, Abbrev.
Environ.Pollut.
Pub Date Free Form
/
Volume
130
Issue
2
Start Page
165
Other Pages
176
Notes
Place of Publication
ISSN/ISBN
0269-7491
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Trichloroacetic acid (TCA, CCl3COOH) has been associated with forest damage but the source of TCA to trees is poorly characterised. To investigate the routes and effects of TCA uptake in conifers, 120 Sitka spruce (Picea sitchensis (Bong.) Carr) saplings were exposed to control, 10 or 100 μg l-1 solutions of TCA applied twice weekly to foliage only or soil only over two consecutive 5-month growing seasons. At the end of each growing season similar elevated TCA concentrations (approximate range 200-300 ng g-1 dwt) were detected in both foliage and soil-dosed saplings exposed to 100 μg l-1 TCA solutions showing that TCA uptake can occur from both exposure routes. Higher TCA concentrations in branchwood of foliage-dosed saplings suggest that atmospheric TCA in solution is taken up indirectly into conifer needles via branch and stemwood. TCA concentrations in needles declined slowly by only 25-30% over 6 months of winter without dosing. No effect of TCA exposure on sapling growth was measured during the experiment. However at the end of the first growing season needles of saplings exposed to 10 or 100 μg l-1 foliage-applied TCA showed significantly more visible damage, higher activities of some detoxifying enzymes, lower protein contents and poorer water control than needles of saplings dosed with the same TCA concentrations to the soil. At the end of each growing season the combined TCA storage in needles, stemwood, branchwood and soil of each sapling was <6% of TCA applied. Even with an estimated half-life of tens of days for within-sapling elimination of TCA during the growing season, this indicates that TCA is eliminated rapidly before uptake or accumulates in another compartment. Although TCA stored in sapling needles accounted for only a small proportion of TCA stored in the sapling/soil system it appears to significantly affect some measures of sapling health. © 2004 Elsevier Ltd. All rights reserved.
Descriptors
trichloroacetic acid, water, air pollution indicator, article, bioaccumulation, concentration process, concentration response, conifer, correlation analysis, detoxification, enzyme activity, foliage, half life time, long term exposure, phytochemistry, plant damage, plant growth, pollution, seasonal variation, sitka spruce, soil analysis, statistical significance, water analysis, winter
Links
Book Title
Database
Embase; MEDLINE
Publisher
Data Source
Embase
Authors
Dickey,C. A., Heal,K. V., Stidson,R. T., Koren,R., Schröder,P., Cape,J. N., Heal,M. R.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Prenatal and postnatal environmental tobacco smoke exposure and children&#39;s health 2004 Department of Family Medicine and Community Health, University of Massachusetts Medical School, Worcester, Massachusetts 01655, USA. difranzj@ummhc.org
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Pediatrics
Periodical, Abbrev.
Pediatrics
Pub Date Free Form
Apr
Volume
113
Issue
4 Suppl
Start Page
1007
Other Pages
1015
Notes
LR: 20061115; JID: 0376422; 0 (Tobacco Smoke Pollution); RF: 173; ppublish
Place of Publication
United States
ISSN/ISBN
1098-4275; 0031-4005
Accession Number
PMID: 15060193
Language
eng
SubFile
Journal Article; Review; AIM; IM
DOI
Output Language
Unknown(0)
PMID
15060193
Abstract
Children's exposure to tobacco constituents during fetal development and via environmental tobacco smoke (ETS) exposure is perhaps the most ubiquitous and hazardous of children's environmental exposures. A large literature links both prenatal maternal smoking and children's ETS exposure to decreased lung growth and increased rates of respiratory tract infections, otitis media, and childhood asthma, with the severity of these problems increasing with increased exposure. Sudden infant death syndrome, behavioral problems, neurocognitive decrements, and increased rates of adolescent smoking also are associated with such exposures. Studies of each of these problems suggest independent effects of both pre- and postnatal exposure for each, with the respiratory risk associated with parental smoking seeming to be greatest during fetal development and the first several years of life.
Descriptors
Animals, Asthma/etiology, Child, Child Behavior/drug effects, Embryonic and Fetal Development/drug effects, Female, Humans, Infant, Intelligence/drug effects, Otitis Media/etiology, Pregnancy, Respiratory Tract Infections/etiology, Smoking/adverse effects, Sudden Infant Death/etiology, Tobacco Smoke Pollution/adverse effects/analysis
Links
Book Title
Database
Publisher
Data Source
Authors
DiFranza,J. R., Aligne,C. A., Weitzman,M.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Otoscopic appearances and tympanometric changes in narghile smokers 2004 Effat, K.G., Medinet El-Mohandeseen, Giza, Egypt
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of Laryngology and Otology
Periodical, Abbrev.
J.Laryngol.Otol.
Pub Date Free Form
/
Volume
118
Issue
10
Start Page
818
Other Pages
821
Notes
Place of Publication
ISSN/ISBN
0022-2151
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Narghile (water-pipe) smoking requires the generation of significant negative intrapharyngeal pressure, which may be transmitted to the middle ear through the Eustachian tube. A total of 80 ears from regular narghile smokers were examined otoscopically and by tympanometry. Seventy ears from heavy cigarette smokers were similarly examined and served as a control group. There was a highly significant increase in the prevalence of attic retractions (P 0.05).
Descriptors
adult, aged, article, atmospheric pressure, auditory tube, cholesteatoma, smoking, clinical article, controlled study, cultural factor, human, male, middle ear pressure, Middle East, narghile smoker, otoscopy, prevalence, smoking habit, swallowing, tympanometry
Links
Book Title
Database
Embase; MEDLINE
Publisher
Data Source
Embase
Authors
Effat,K. G.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Influence of smoking and snus on the prevalence and incidence of type 2 diabetes amongst men: the northern Sweden MONICA study 2004 Department of Medicine, Sunderby Hospital, Lulea, Sweden. mats.eliasson@nll.se
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of internal medicine
Periodical, Abbrev.
J.Intern.Med.
Pub Date Free Form
Aug
Volume
256
Issue
2
Start Page
101
Other Pages
110
Notes
LR: 20061115; JID: 8904841; CIN: J Intern Med. 2005 May;257(5):481-2; author reply 483. PMID: 15836667; ppublish
Place of Publication
England
ISSN/ISBN
0954-6820; 0954-6820
Accession Number
PMID: 15257722
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1111/j.1365-2796.2004.01344.x [doi]
Output Language
Unknown(0)
PMID
15257722
Abstract
OBJECTIVE: To explore the effect of smoking and smokeless tobacco, 'snus', on the risk of type 2 diabetes. DESIGN: Population-based cross-sectional and prospective follow-up study in northern Sweden. SUBJECTS: A total of 3384 men, aged 25-74 years, who participated in the MONICA study in 1986, 1990, 1994 or 1999, 1170 of whom had an oral glucose tolerance test. In 1999, 1757 men from previous cohorts returned for re-examination. Main outcome measures. We compared the prevalence of type 2 diabetes or pathological glucose tolerance (PGT) amongst tobacco users to that of nonusers at entry into the study and at follow-up, using odds ratios. RESULTS: Compared with never users, the age-adjusted risk of prevalent clinically diagnosed diabetes for ever smokers was 1.88 (CI 1.17-3.0) and for smokers 1.74 (0.94-3.2). Corresponding odds ratios for snus users were 1.34 (0.65-2.7) and 1.18 (0.48-2.9). We found no increased risk of prevalent PGT in snus users or smokers. Former smokers and snus users had an insignificantly increased risk for PGT. Compared with nonusers, the age-adjusted risk of developing clinically diagnosed diabetes during follow-up was 4.63 (1.37-16) in consistent exclusive smokers, 3.20 (1.16-8.8) in ex-smokers and no cases in consistent snus users. The risk of PGT during follow-up was not increased in consistent tobacco users but evident, although not statistically significant, in those who quit snus during the follow-up period, 1.85 (0.60-5.7). Adjustment for physical activity and alcohol consumption did not change the major findings. CONCLUSIONS: The risk of diabetes for snus users was not significantly increased. Smoking was associated with prevalent and incident cases of diabetes. Ex-tobacco users tended towards more PGT.
Descriptors
Adult, Aged, Cross-Sectional Studies, Diabetes Mellitus, Type 2/epidemiology/etiology, Follow-Up Studies, Health Surveys, Humans, Incidence, Logistic Models, Male, Middle Aged, Prevalence, Risk, Smoking/adverse effects, Sweden/epidemiology, Tobacco, Smokeless/adverse effects
Links
Book Title
Database
Publisher
Data Source
Authors
Eliasson,M., Asplund,K., Nasic,S., Rodu,B.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Hepatitis C virus infection at Sharkia Governorate, Egypt: seroprevalence and associated risk factors. 2004 el-Sadawy, M., Faculty of Medicine, Zagazig University, Zagazig.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of the Egyptian Society of Parasitology
Periodical, Abbrev.
J.Egypt.Soc.Parasitol.
Pub Date Free Form
/
Volume
34
Issue
1 Suppl
Start Page
367
Other Pages
384
Notes
Place of Publication
ISSN/ISBN
0253-5890
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Because many persons with chronic hepatitis C virus (HCV) infection are asymptomatic, population based serologic studies are needed to estimate the prevalence of infection and to develop and evaluate prevention efforts. A sample of 1422 individuals was included in the study by using multistage sampling technique. Their age ranged from 4-78 years with a mean age (34.7 +/- 18.5), 782 were males (55%) and 640 were females (45%). Exposures and demographic characteristics were obtained through a predesigned questionnaire. Antibody to HCV was assessed using micro-particle enzyme immunoassay (MEIA) enzyme assay by IMX, and the HCV RNA was tested by Real-time PCR technique using ABI Prism 7700 system. The seroprevalence of antibodies to HCV were 23.4% and 27.4% in urban and rural areas respectively, with an overall prevalence (25.8%). This reflects prior HCV infection but not necessarily a current liver disease. Prevalence was higher among males than females and increased sharply with age, from 4.8% in those or = 40 years). Those who were not educated and farmers had a significantly high prevalence. The significant predictors of HCV infection were previous parenteral therapy for schistosomiasis (OR = 4.3, 95% CI = 3.6-7.9), among those over 20 years of age (3.5, 2.18-5.8), blood transfusion (4.1, 2.4-6.9), invasive procedures (surgery and endoscopy), and use of contaminated syringes and needles. Also, shaving at community barbers added significance to the model. Exposures not significantly related to HCV seropositivity were gender, active infection with Schistosoma mansoni, sutures or intravenous and urinary catheterization, water pipe "goza" smoking in group.
Descriptors
hepatitis C antibody, virus RNA, adolescent, adult, age, aged, article, blood, child, Egypt, epidemiology, female, genetics, hepatitis C, Hepatitis C virus, human, immunology, male, middle aged, preschool child, risk factor, sex difference, socioeconomics
Links
Book Title
Database
MEDLINE
Publisher
Data Source
Embase
Authors
el-Sadawy,M., Ragab,H., el-Toukhy,H., el-Mor,A. L., Mangoud,A. M., Eissa,M. H., Afefy,A. F., el-Shorbagy,E., Ibrahem,I. A., Mahrous,S., Abdel-Monem,A., Sabee,E. I., Ismail,A., Morsy,T. A., Etewa,S., Nor Edin,E., Mostafa,Y., Abouel-Magd,Y., Hassan,M. I., Lakouz,K., Abdel-Aziz,K., el-Hady,G., Saber,M.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Effects of smoking on clinical parameters and the gingival crevicular fluid levels of IL-6 and TNF-alpha in patients with chronic periodontitis 2004 Department of Periodontology, School of Dentistry, Selcuk University, Konya, Turkey. ebruerdemir@hotmail.com
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of clinical periodontology
Periodical, Abbrev.
J.Clin.Periodontol.
Pub Date Free Form
Feb
Volume
31
Issue
2
Start Page
99
Other Pages
104
Notes
LR: 20061115; CI: Copyright Blackwell Munksgaard, 2004; JID: 0425123; 0 (Interleukin-6); 0 (Tumor Necrosis Factor-alpha); ppublish
Place of Publication
Denmark
ISSN/ISBN
0303-6979; 0303-6979
Accession Number
PMID: 15016034
Language
eng
SubFile
Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; D; IM
DOI
10.1111/j.0303-6979.2004.00454.x [doi]
Output Language
Unknown(0)
PMID
15016034
Abstract
OBJECTIVE: Smoking is an important environmental risk factor for the initiation and progression of periodontal diseases. The aim of this study was to evaluate the effects of smoking on clinical parameters and the gingival crevicular fluid (GCF) contents of the pro-inflammatory cytokines interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-alpha) levels in patients with chronic periodontitis. MATERIAL AND METHODS: The study base consisted of 41 patients including 22 volunteer current smokers with an age range of 32-59 (44.41+/-7.88) years and 19 volunteer non-smokers with an age range of 36-59 (46.94+/-6.07) years. The first month after non-surgical periodontal therapy was accepted as the baseline of the study. The clinical parameters including plaque index (PI), gingival index (GI), bleeding on probing (BOP), probing depth (PD), clinical attachment loss (CAL) were recorded and GCF samples were collected for analysis of GCF contents of IL-6 and TNF-alpha levels. At the 3rd and 6th months, all of these procedures were repeated. RESULTS: In smokers, only CAL was significantly higher at the 3rd month compared with non-smokers (p0.05), the total amount of TNF-alpha in GCF decreased from the initial to the 6th month in smokers (p0.05). CONCLUSION: The present study demonstrated that cigarette smoking increases the amount of dental plaque over time in smokers and does not influence GCF contents of IL-6 and TNF-alpha.
Descriptors
Adult, Analysis of Variance, Chronic Disease, Dental Plaque Index, Dental Scaling, Female, Follow-Up Studies, Gingival Crevicular Fluid/chemistry, Gingival Hemorrhage/physiopathology, Humans, Interleukin-6/analysis, Male, Middle Aged, Periodontal Attachment Loss/physiopathology, Periodontal Index, Periodontal Pocket/physiopathology, Periodontitis/physiopathology/therapy, Root Planing, Smoking/physiopathology, Tumor Necrosis Factor-alpha/analysis
Links
Book Title
Database
Publisher
Data Source
Authors
Erdemir,E. O., Duran,I., Haliloglu,S.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors