Fourteen surface water and nine surface sediment samples were collected from the Peacock River and analyzed for organochlorine pesticides (OCPs) by gas chromatograph-electron capture detector (GC-ECD). All the analyzed organochlorine pesticides, except o,p'-DDT, were detected in sediments from the Peacock River; but in the water samples, only β-HCH, HCB, p,p'-DDD, and p,p'-DDT were detected at some sites. The ranges for total OCPs in the water and sediments were from N.D. to 195 ng l( - 1) and from 1.36 to 24.60 ng g( - 1), respectively. The only existing HCH isomer in the water, β-HCH, suggested that the contamination by HCHs could be attributed to erosion of the weathered agricultural soils containing HCHs compounds. Composition analyses showed that no technical HCH, technical DDT, technical chlordanes, endosulfans, and HCB had been recently used in this region. However, there was new input of γ-HCH (lindane) into the Peacock River. The most probable source was water flowing from Bosten Lake and/or agricultural tailing water that was returned directly into the Peacock River. DDT compounds in the sediments may be derived mainly from DDT-treated aged and weathered agricultural soils, the degradation condition was aerobic and the main product was DDE. HCB in the sediment might be due to the input from Bosten Lake and the lake may act as an atmospheric deposition zone. There was no significant correlation between the concentrations of OCPs (including ∑HCH, ∑DDT, chlordanes, endosulfans, HCB and total OCPs) and the content of fine particles (<63 μm). The concentrations of OCPs were affected by salinity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s10661-010-1613-2 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Critical care unit bed availability and postoperative outcomes: a multinational cohort study.
Anaesthesia
November 2024
National Insitute for Health Research University College London Hospitals Biomedical Research Centre, University College, London, UK.
Background: Critical care beds are a limited resource, yet research indicates that recommendations for postoperative critical care admission based on patient-level risk stratification are not followed. It is unclear how prioritisation decisions are made in real-world settings and the effect of this prioritisation on outcomes.
Methods: This was a prespecified analysis of an observational cohort study of adult patients undergoing inpatient surgery, conducted in 274 hospitals across the UK and Australasia during 2017.
Stress Ulcer Prophylaxis during Invasive Mechanical Ventilation.
N Engl J Med
July 2024
From From the Departments of Medicine (D.C., G.G., W.A., M.M., E.D., J.C.D., J.L.Y.T., B. Rochwerg, T.K.), Health Research Methods, Evidence, and Impact (D.C., N.Z., G.G., D.H.-A., G.R., W.A., M.M., L.H., F.C., J.C.D., B. Rochwerg, F.X., L.T.), and Family Medicine (M.V.), McMaster University, Hamilton, ON, the Department of Medicine, University of British Columbia, Vancouver, BC (B.D.), Population Health and Optimal Health Practice Research Unit, Centre Hospitalier Universitaire de Québec, Université Laval Research Center, Quebec, QC (F. Lauzier), St. Joseph's Healthcare Hamilton Research Institute, Hamilton, ON (D.C., F.C., G.G., L.S., L.T., N.Z.), Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto (J. Marshall, K.B., A. Goffi, M.E.W., R.F., N.K.J.A., S.M.); Queen's University, Kingston, ON (J. Muscedere), the Department of Medicine, Critical Care, University of Ottawa, Ottawa (S.E.), Dalhousie University, Halifax, NS (R.H., O.L.), Niagara Health, St. Catharines, ON (E.D., J.L.Y.T.), Université de Sherbrooke, Sherbrooke, QC (F. Lamontagne, F.D., C.S.A.), Brantford General Hospital, Brantford, ON (B. Reeve), North York General Hospital, Toronto (A. Geagea), the Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB (D.N., K.F.), the University of Manitoba, Winnipeg (G.V.-G., R.Z.), Royal Jubilee Hospital, Victoria, BC (D.O., G.W.), Unity Health Toronto-St. Michael's Hospital, Toronto (K.B., A. Goffi), Vancouver General Hospital, Vancouver, BC (W.H.), Nanaimo Regional General Hospital, Nanaimo, BC (D.F.), the Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto (R.F., N.K.J.A.), Western University, London, ON (I.B., T.M.), William Osler Hospital, Brampton, ON (A.B., S.T.), Mount Sinai Hospital, Toronto (S.M.), Cambridge Memorial Hospital, Cambridge, ON (I.M.), Centre Hospitalier de l'Université de Montréal (E.C.) and Hôpital du Sacré-Coeur de Montréal (E.C., Y.A.C.), University of Montreal (D.W.), Montreal, Université Laval, Quebec, QC (P.A.), the Department of Critical Care Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton (O.G.R., V.L.), Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre (A.S.K.), and the Department of Critical Care, McGill University (A.S.K., K.K.), Montreal, the Ottawa Hospital Research Institute, Ottawa (S. Kanji), the Department of Medicine, University of Saskatchewan, and the Department of Critical Care, Saskatchewan Health Authority, Regina (E.S.), Royal Columbia Hospital, New Westminster, BC (S.R.), Centre Intégré Universitaire de Santé et de Services Sociaux de l'Est-de-l'Île-de-Montréal, Hôpital Maisonneuve-Rosemont, Montreal (F.M.), Université Laval, Faculté de Médecine, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC (F. Lellouche), the Department of Medicine, Windsor Regional Hospital, Windsor, ON (A.R.), Grand River Hospital, Kitchener, ON (P.H.), St. Joseph's Hospital, Toronto (R.C.), St. John Regional Hospital, St. John, NB (M.T.) - all in Canada; the University of Melbourne, Melbourne, VIC (A.D.); the George Institute for Global Health, Faculty of Medicine and Health, University of New South Wales (M.H., J. Myburgh, S. Knowles, N.H., B.V., D.R., L.B., S.F.) and St. George Hospital (J. Myburgh), Sydney, Royal Melbourne Hospital, Melbourne, VIC (K.M.B.), and the University of Adelaide, Adelaide, SA (M.C., A.P.) - all in Australia; King Abdullah International Medical Research Center and King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia (Y.M.A.); King's College London (M.O.) and School of Public Health, Faculty of Medicine, Imperial College (S.F.), London; Medical Research Institute of New Zealand, Wellington, New Zealand (P.Y.); the Department of Anesthesia, Critical Care Medicine, and Pain Medicine, Kuwait Extracorporeal Life Support Program, Al-Amiri Hospital, Ministry of Health, Kuwait City, Kuwait (A.A.-F.); Pontifical Catholic University, Belo Horizonte, Brazil (G.R.); the University of Nebraska Medical Center, Omaha (D.J.); the Department of Pulmonary and Critical Care Medicine, Maroof International Hospital, Islamabad, Pakistan (M.I.); and Midwestern University, College of Pharmacy, Glendale, AZ (J.F.B.).
Article Synopsis
- A study was conducted to evaluate the effects of the proton-pump inhibitor pantoprazole on critically ill patients undergoing invasive ventilation, comparing it to a placebo.
- The trial included 4,821 patients and found that pantoprazole significantly reduced the incidence of clinically important upper gastrointestinal bleeding compared to placebo (1.0% vs. 3.5%).
- However, there was no significant difference in overall mortality rates at 90 days between the pantoprazole group (29.1%) and the placebo group (30.9%).
Continuous vs Intermittent β-Lactam Antibiotic Infusions in Critically Ill Patients With Sepsis: The BLING III Randomized Clinical Trial.
JAMA
August 2024
Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia.
Article Synopsis
- A study investigated if continuous infusion of β-lactam antibiotics reduces death risk in critically ill sepsis patients, comparing this method to intermittent infusion.
- Conducted in 104 ICUs across several countries from 2018 to 2023, the trial involved over 7,200 participants receiving either piperacillin-tazobactam or meropenem.
- Results showed a slight decrease in 90-day mortality for continuous infusion (24.9%) versus intermittent infusion (26.8%), but the difference was not statistically significant (-1.9% difference).
Early trajectories of virological and immunological biomarkers and clinical outcomes in patients admitted to hospital for COVID-19: an international, prospective cohort study.
Lancet Microbe
June 2024
Division of General Internal Medicine, Department of Medicine, Duke University School of Medicine, Durham, NC, USA.
Background: Serial measurement of virological and immunological biomarkers in patients admitted to hospital with COVID-19 can give valuable insight into the pathogenic roles of viral replication and immune dysregulation. We aimed to characterise biomarker trajectories and their associations with clinical outcomes.
Methods: In this international, prospective cohort study, patients admitted to hospital with COVID-19 and enrolled in the Therapeutics for Inpatients with COVID-19 platform trial within the Accelerating COVID-19 Therapeutic Interventions and Vaccines programme between Aug 5, 2020 and Sept 30, 2021 were included.
Stethoscope barriers narrative review; It's time for a strategy unfriendly to multi-drug resistant organisms (MDROs).
J Infect Public Health
June 2024
University of California, San Diego, United States.
The current standard of stethoscope hygiene doesn't eliminate the transmission of harmful pathogens, including multi-drug resistant organisms (MDROs). In the era of the increasing prevalence of MDRO infections, the use of new systems providing touch free barriers may improve patient safety versus traditional stethoscope cleaning practices with chemical agents. Our purpose was to provide a narrative literature review regarding barriers as an improvement over the current standard of care for stethoscope hygiene.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!