نتایج جستجو برای: liquids and chemicals
تعداد نتایج: 16836004 فیلتر نتایج به سال:
In this work, the PC-SAFT equation of state (EoS) has been used to model the solubility of acid gases (CO2 and H2S) in two imidazolium-based ionic liquids (ILs) ([C8-mim][PF6] and [C8-mim][Tf2N]). Parameters of pure ILs were estimated using experimental densities. Two strategies were considered to model densities of pure ILs. In strategy 1, ILs were modeled as nonassociating compounds and in st...
Glycidyl azide polymer (GAP) is used as a binder in the propellants. Energetic ionic liquids are used as a plasticizer to correct the properties of polymer. In this study, first ionic liquid was bonded to the GAP by certain amount and then the energetic anions of nitrate (NO3) and azide (N3) were used to exchange anion. FTIR analyses confirm accurately anions exchange. DSC, viscometer and heat ...
Background: Burns and its complications are regarded as a major problem in the society. Skin injuries resulted from ultraviolet radiation, radioactivity, electricity or chemicals as well as respiratory damage from smoke inhalation are considered burns. This study aimed to determine the epidemiology and outcome of burn patients admitted to Motahari Hospital, Tehran, Iran. Methods: Two hundred...
Room-temperature ionic liquids (ILs) are considered to be green chemicals that may replace volatile organic solvents currently used by industry. However, IL effects on aquatic organisms and ecosystems are currently unknown. We studied the acute effects of imidazolium-based ILs on survival of the crustacean Daphnia magna and their chronic effects on number of first-brood neonates, total number o...
while the oecd test guidelines and mostly animal assays have been used to study the toxic effects of chemicals for many years, very little is known about the potential toxicity of vast majority of inhaled chemicals. considering large number of chemicals and complex mixtures present in indoor and outdoor air, heavy reliance on animal test methods appear to be not adequate. continuing scientific ...
Chemical transformations frequently involve time-consuming processes that can occasionally be achivied by employing different techniques and media. New methods allow us to explore new reaction profiles while saving time solvents. As a result, solvent classes for processing chemicals have been introduced. Supercritical fluids, fluorous solvents, solvents made from biomass, in addition ionic liqu...
Introduction: Chemicals are necessary for many economic activities and daily life. However, they can create noxious effects on individuals. It is required more attention to human (worker) health on the route of attainment of sustainable development. The present study reviews the studies done in the field of the effect of toxicants on workers' health. Also, the study investigated the role of tox...
Background: In the foam industries, workers are exposed to various chemicals and working with these chemicals without considering occupational safety and health considerations could lead to different harmful symptoms. Consequently, in order to control measures and reducing risk to acceptable level, it is necessary to assess the health risk of exposure to harmful chemicals by implementation of s...
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