نتایج جستجو برای: ingestion dose and risk assessment

تعداد نتایج: 17100636  

Journal: :Clinical toxicology 2005
Paul M Wax Andrew R Erdman Peter A Chyka Daniel C Keyes E Martin Caravati Lisa Booze Gwenn Christianson Alan Woolf Kent R Olson Anthony S Manoguerra Elizabeth J Scharman William G Troutman

In 2003, US poison centers were contacted regarding ingestion of beta-blockers by 15,350 patients including 3766 (25%) under 6 years of age; 7415 (48%) were evaluated in healthcare facilities and 33 died. An evidence-based expert consensus process was used to create this guideline. Relevant articles were abstracted by a trained physician researcher. The first draft of the guideline was created ...

Journal: Pollution 2019

Coal mining and related industry can increase heavy metals (HMs) concentrations in soil, atmosphere and wheat, thereby posing metal-associated human health risk via food ingestion.  In this study, 58 samples of soil, wheat, and dust were collected from Xuzhou coal mine eastern China, six kinds of HMs Pb, Cd, Cu, Zn, As and Cr were studied for their spatial distribution in wheat, enrichment in d...

2016
Nancy M. Vu Terence E. Hill Matthew R. Summers Michael N. Vranian Michael D. Faulx

Introduction Anti-arrhythmic drug therapy carries an understood risk for toxic side effects, even at therapeutic doses. In cases of high dose ingestion these toxic effects can present rapidly with extra-cardiac symptoms, malignant arrhythmias and lifethreatening hemodynamic deterioration. Prescribing clinicians should maintain familiarity with the mechanisms and kinetics of the anti-arrhythmic ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1389

within the components of communicative competence, a special emphasis is put on the “rules of politeness,” specifically the politeness strategies (brown and levinson, 1978) that speakers deploy when performing the request speech act. this is because the degree of imposition that making a request places upon one’s interlocutor(s) has been seen to be influenced by several factors among which, as ...

Objective(s): In veterinary medicine, zeolites are used as toxin binder in animal feed, ammonia purification of aquatic pools, animal smell and moisture control. This study investigated on the risk assessment of nano zeolite on development of embryonic chicken models, anomalies, tetratogenic and embryotoxic effects. Methods: Eggs (120 = n) were accidentally di...

Journal: :acta medica iranica 0
roohollah yeganeh department of surgery, loqman hakim hospital, school of medicine, shahid beheshti university of medical sciences, tehran, iran. hasan peyvandi department of surgery, loqman hakim hospital, school of medicine, shahid beheshti university of medical sciences, tehran, iran. mohammad mohajeri department of gastroenterology and surgery, loqman-hakim hospital, school of medicine, shahid beheshti university of medical sciences, tehran, iran. reza bashtar department of gastroenterology and surgery, loqman-hakim hospital, school of medicine, shahid beheshti university of medical sciences, tehran, iran. mohammad bashashati department of gastroenterology and surgery, loqman-hakim hospital, school of medicine, shahid beheshti university of medical sciences, tehran, iran. mina ahmadi resident of community medicine, school of medicine, shahid beheshti university of medical sciences, tehran, iran.

ingested corrosive substances produce different injuries, ranging from minor gastro esophageal burns to death, depending on the agent type, amount, concentration, and duration of substance exposure. the purpose of this study was to investigate the outcomes and different causes of mortality in patients ingesting caustic substances. in a prospective study, between april 1999 and january 2006, a t...

Journal: :research in cardiovascular medicine 0
ahmad bitarafan rajabi department of nuclear medicine, rajaie cardiovascular, medical and research center, iran university of medical sciences, tehran, ir iran feridoun noohi cardiovascular intervention research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran hassan hashemi noor ophthalmology research center, noor eye hospital, tehran, ir iran; noor ophthalmology research center, noor eye hospital, tehran, ir iran. tel: +98-2188651515, fax: +98-2188651514 majid haghjoo cardiac electrophysiology research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran mohammad miraftab noor ophthalmology research center, noor eye hospital, tehran, ir iran nahid yaghoobi department of nuclear medicine, rajaie cardiovascular, medical and research center, iran university of medical sciences, tehran, ir iran

results the electrophysiology laboratory staff received higher doses of ionizing radiation (17.2 ± 11.9 msv; p < 0.001). there was a significant positive correlation between the years of working experience and effective dose in the lens (p < 0.001). in general, our findings showed that the incidence of lens opacity was 79% (95% ci, 69.9-88.1) in participants with exposure (the case group) and o...

Journal: :International journal of occupational and environmental health 2004
Edward J Calabrese

Hormesis, a dose-response phenomenon characterized by a low-dose stimulation and a high-dose inhibition, has been the object of controversy due to its challenging of basic understandings of the dose-response relationship and implications for risk assessment. The author addresses issues relating to the definition of hormesis, the relationship of hormesis to risk assessment and risk management, a...

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