نتایج جستجو برای: acute and chronic exposure

تعداد نتایج: 17068453  

Tench, Tinca tinca, were exposed to three treatments (one acute lethal 96 hrs Lc50/48 hrs and two chronic sublethal 10 and 25% Lc50/504 hrs) each of Mercury, Cadmium and Lead and its behaviour as an indicator of impaired hematology was studied. It was observed that impairments in hematological parameters (increased/decreased Hct, Hb, RBC, WBC and Lct) were reflected in behaviour of fish in the ...

Tench, Tinca tinca, were exposed to three treatments (one acute lethal 96 hrs Lc50/48 hrs and two chronic sublethal 10 and 25% Lc50/504 hrs) each of Mercury, Cadmium and Lead and its behaviour as an indicator of impaired hematology was studied. It was observed that impairments in hematological parameters (increased/decreased Hct, Hb, RBC, WBC and Lct) were reflected in behaviour of fish in the ...

Journal: :journal of paramedical sciences 0
majid mahdavi department of biology, faculty of natural science, university of tabriz, tabriz, iran. reza yekta department of biology, faculty of natural science, university of tabriz, tabriz, iran. saeed hesami tackallou department of biology, garmsar branch, islamic azad university, tehran, iran.

extremely low frequency (elf) electromagnetic field (elf-emfs) are widely employed in electrical appliances and different equipment such as television sets, elf-emfs can  affect biological systems by increasing production  ros. the altered balance between ros generation and elimination plays a critical role in a variety of pathologic conditions. ros levels have been observed in several hematopo...

2018
Ashley C. Nelson Stephanie B. Williams Stephanie S. Pistorius Hyun J. Park Taylor J. Woodward Andrew J. Payne J. Daniel Obray Samuel I. Shin Jennifer K. Mabey Scott C. Steffensen

The neural mechanisms underlying alcohol dependence are not well-understood. GABAergic neurons in the ventral tegmental area (VTA) are a relevant target for ethanol. They are inhibited by ethanol at physiologically-relevant levels in vivo and display marked hyperexcitability during withdrawal. In the present study, we examined the effects of the GABA(A) receptor agonist muscimol on VTA neurons ...

Journal: :iranian journal of allergy, asthma and immunology 0
ali ahmadi torshizi mohammad tohidi davood attaran mehrangiz khaje karamadin kiarash ghazvini

the role of chlamydia pneumoniae in asthma has drawn much attention in recent years. in this study we assessed the prevalence of c. pneumoniae infections in patients with chronic stable and acute exacerbation of asthma and compared it with normal population. twenty adult patients with chronic stable asthma and 21 patients with acute exacerbations of asthma and 41 matched control subjects were s...

Journal: :British journal of industrial medicine 1985
A Okada H Okuda R Inaba M Ariizumi

This study was designed to obtain basic information about the mechanism of the occurrence of muscular disorders after exposure to vibration. The hind legs of rats were exposed to acute and chronic local vibration at frequencies of 30, 60, 120, 240, 480, and 960 Hz with a constant acceleration of 50 m/sec2. The exposure time was four hours for acute, and four hours a day for two weeks continuous...

ژورنال: سلامت کار ایران 2017

Background and aim: Low back pain is a prevalent musculoskeletal disorder associated with nursing profession. This study was conducted to compare the effects of Williams exercise and walking on relief of non-traumatic low back pain in nurses. Methods: In this semi-experimental study with pretest-posttest design, 100 nurses with chronic and acute low back pain and working in Ayatollah Kashani...

Journal: :jundishapur journal of microbiology 0
mohammad reza hasanjani roushan infectious diseases and tropical medicine research center, babol university of medical sciences, babol, ir iran soheil ebrahimpour infectious diseases and tropical medicine research center, babol university of medical sciences, babol, ir iran zahra moulana infectious diseases and tropical medicine research center, babol university of medical sciences, babol, ir iran; infectious diseases and tropical medicine research center, babol university of medical sciences, babol, ir iran. tel/fax: +98-1132207918

conclusions this infection was observed with a diversity of clinical manifestations. therefore, diagnostic difficulty because of the various clinical presentations and the way to find undiagnosed complications should be investigated in the differential diagnosis of other diseases. results most of the patients (73.8%) were in the acute stages of brucellosis, 22.6% had sub-acute brucellosis and 3...

S.A Strungaru, G Plavan , M Nicoara ,

According to Paracelsus (1493-1541) everything from this planet is poison, only the dose makes the poison to be harmless. Even the essential elements for life support are toxic for all organisms in high amounts. Mercury, cadmium, metalloid arsenic and lead were responsible for poisoning and death of many humans and life forms from this planet for centuries. Cadmium forms different compounds tha...

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