نتایج جستجو برای: formaldehyde threshold limit values
تعداد نتایج: 792106 فیلتر نتایج به سال:
Possible central noradrenergic and cholinergic modulation of acute peripheral inflammation was investigated in rats, adopting the formaldehyde-induced pedal inflammation as the experimental model. Intracerebroventricularly (icv) administered noradrenaline (NA), alpha-adrenoceptor agonist, L-phenylephrine, alpha-2 adrenoceptor agonist, clonidine and non-selective beta-adrenoceptor blocker, propr...
BACKGROUND Formaldehyde crosslinking is in widespread use as a biological fixative for microscopy and molecular biology. An assumption behind its use is that most biologically meaningful interactions are preserved by crosslinking, but the minimum length of time required for an interaction to become fixed has not been determined. METHODOLOGY Using a unique series of mutations in the DNA bindin...
The Fourier transform spectrometer MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) on Envisat measures infrared emission of the Earth’s atmosphere in a limb viewing mode. High spectral resolution measurements of MIPAS are sensitive to formaldehyde from the upper troposphere to the stratopause. Single profile retrievals of formaldehyde are dominated by a 60% noise error; howeve...
Introduction: Clustering of human brain is a very useful tool for diagnosis, treatment, and tracking of brain tumors. There are several methods in this category in order to do this. In this study, modified balanced iterative reducing and clustering using hierarchies (m-BIRCH) was introduced for brain activation clustering. This algorithm has an appropriate speed and good scalability in dealing ...
To develop an Indoor Air Quality (IAQ) monitoring and detecting system based on a new Internet of Thing (IoT) sensory technology device that incorporated nine recommended indoor pollutants by the academic literature reliable organizations, such as World Health Organization (WHO), Environmental Protection Agency (EPA), International for Standardization (ISO). The include Carbon Monoxide (CO), Di...
Formaldehyde is a chemical used in many different industrial sectors and classified as carcinogen well causing allergic reactions. Due to the health effects of formaldehyde, which widely textile dyes auxiliary chemicals, its analysis this type matrices becomes important. In study, order meet these requirements, formaldehyde was converted oxime derivative by derivatization with o-(2,3,4,5,6-Pent...
The administration of methenamine mandelate (Mandelamine) to pregnant women causes the levels of estriol in their urines to be unmeasurably low when acid hydrolysis is used. When enzyme hydrolysis replaces acid hydrolysis, normal estriol values are obtained. This result is attributed to the formaldehyde released by acid from hexamethylenetetramine, a constituent of the drug. The formaldehyde re...
This research was conducted to determine formaldehyde exposure of staffs in pathology laboratories, surgery rooms and endoscopy wards in eight large hospitals of Tehran University of Medical Sciences located at Tehran, Iran. Air sampling have been made by both long and short-term methods. Total numbers of samples were 160 for both methods. Nineteen samples of 160 samples were collected as blank...
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