نتایج جستجو برای: permitted limit
تعداد نتایج: 208068 فیلتر نتایج به سال:
Considering the importance of transport commission agent's work and through examination liability, intensity burden liability is shown. The legal nature a obligation an to achieve result, thus he usually has contract out either limits where law established exemptions that agent would benefit from, as well agreement cases in which allowed establish condition under exempts him from or specify his...
Introduction In radiography, dose and image quality are dependent on radiographic parameters. The problem is caused from incorrect use of radiography equipment and from the radiation exposure to patients much more than required. Therefore, the aim of this study was to implement a quality-control program to detect changes in exposure parameters, which may affect diagnosis or patient radiation do...
Background and Aim: Recent advances in technology have permitted manufacturers to produce endodontic files from NiTi alloy and rotary systems. According to manufacturers, these files maintain original canal shape better than hand files and reduce treatment time. The aim of this study was to compare a new rotary system (Race) with an older one (Profile) in maintaining the original shape of curve...
in this research, air sampling of workplaces was carried out by two methods (long - time and short - time). the mean formaldehyde concentration with long - time method in pathology labs, surgery and endoscopy sections were 0.96 0.25 and 0.13 ppm and with short - time method, 8 hours, was 3, 0.3 and 0.2 ppm. the mean formaldehyde concentration in pathology labs was above the standard values (tlv...
اندازه گیری میزان آفلاتوکسین M1 در شیر پاستوریزه تولیدی کارخانجات استان مازندران در نیمه اول سال1390
Background and purpose: Aflatoxin B1 is the most important poison of aflatoxins that contaminated animal feeds by mold and is transformed to type M1 in kidney and liver after some chemical reactions and they are transmitted to human through animal milk Materials and methods: In current study, 75 samples of pasteurized milk were collected from Mazandaran Province during spring and summer of 201...
Background: Azo dyes are the most widely used synthetic colorants in the textile, food, pharmaceutical, cosmetic, and other industries, accounting for nearly 70% of all dyestuffs consumed. Recently, much research attention has been paid to efficient monitoring of these hazardous chemicals and their related metabolites because of their potentially harmful effect on environmental issues. In contr...
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