نتایج جستجو برای: term exposure
تعداد نتایج: 862601 فیلتر نتایج به سال:
Background: We aimed at evaluating the toxicity effects of low (subtoxic) concentrations of silver nanoparticles (AgNP, 5-10 nm) in human hepatoblastoma (HepG2) cell line after and during a period of about one month. Methods: XTT and MTT assays were used to draw a dose-response curve IC50 (half maximal inhibitory concentration) value of the AgNP on HepG2 cells was calculated to be 2.75-3.0 mg/l...
چکیده: هدف: هدف از پژوهش حاضر مقایسه حافظه (کوتاه مدت، بلند مدت و بصری) در بیماران مبتلا به دیابت نوع 2 و افراد سالم می باشد. روش: روش پژوهش از نوع علی مقایسه ای است. جامعه آماری این تحقیق را کلیه بیماران مبتلا به دیابت نوع 2 ساکن شهرستان پارس آباد و روستاهای اطراف آن تشکیل می دهند. از بین این جامعه، 40 نفر از بیماران مراجعه کننده به پزشکان متخصصین داخلی و پزشکان خانواده که در شهرستان پارس آبا...
background: this investigation describes the cyto-architectural alterations observed in the corpuscles of stannius of stinging catfish heteropneustes fossilis after treatment with a botanical pesticide nerium indicum. methods: heteropneustes fossilis were subjected to 11.27 and 2.81 mg/l of nerium indicum leaf extract over short- and long-term exposure periods, respectively. blood was collected...
Objective(s): Nowadays, the electromagnetic field-emitting devices are used routinely in our lives. Controversial reports exist concerning the effects of mobile radiofrequency (RF) on different parts of the body, especially stress hormones. The main goal of the present work was to study the long-term effects of mobile RF900 MHz exposure with special focus on the adrenal gland pathophysiology an...
Background: Formaldehyde (FA, H2CO), a member of the aldehyde family and one of the simplest organic molecules, is a flammable, pungent, irritating and colorless gas. This study aimed to investigate the effect of formaldehyde (FA) vapor on sperm parameters and testicular tissue concern about the duration of analysis and the amount of the formaldehyde vapor concentrations. Materials and Methods:...
OBJECTIVE To investigate whether the saccule exhibits temporary or permanent functional loss resembling threshold shifts in auditory brainstem response (ABR) of guinea pigs following noise exposure. DESIGN Randomly bred guinea pigs were divided into 3 groups: A (short-term noise exposure, 30 minutes, n = 15), B (long-term noise exposure, 40 hours, n = 9), and C (no noise exposure, n = 5). S...
Background and aims Methyl Methacrylate (MMA) which is known as a long, skin and eye irritant is the most common form of acrylic plastic used in dental laboratories. The aims of this study were to evaluate dental technicians, exposure to MMAand to assess their health with a focus on respiratory and dermal symptoms. Methods Exposure to MMA, total dust and health symptoms were investiga...
Background: Vinyl acetate monomer is a commodity chemical widely used in the manufacturing of various products. The chemical is hazardous and exposure to it may occur in both occupational and non-occupational settings. The aim of this study was to characterize the effects of short-term exposure to Vinyl Acetate Monomer (VAM) vapour on the liver and lungs of Wistar rats. Methods: Mice weighing ...
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