This paper presents a kinetic model for the calculation of polymer chain sequence length distribution in a multi-component step-growth polymerization toward the synthesis of bisphenol A co-polycarbonate. The polymerization system consists of three different types of monomers with two kinds of reactive end groups (e.g. A = phenyl carbonate group, B = hydroxyl group), AR1A, BR2B, and BR3B. The ki...

Background and Objective: In this research, the effect of chronic dietary soybean aqueous extract on aortic reactivity of streptozotocin (STZ)-diabetic rats was investigated. Materials and Methods: STZ-diabetic rats were treated with soybean aqueous extract for two months after diabetes induction. Contractile reactivity to KCl and phenylephrine (PE) and relaxation response to acetylcholine (ACh...

Ignition delay times of small alkenes are a valuable constraint for the refinement core kinetic mechanism hydrocarbons used in representing combustion properties real fuels. Moreover, chemical reactivity comparison those provides reference object-oriented fuel design and logical utilization. In this study, ignition C2–C4 (ethylene, propene 1-butene) were measured behind reflected shock waves fi...

In this study we developed LaNixAl1-xO3 perovskite systems using a sol-gelmethod (with propionic acid as solvent) to use in methane-reforming reactions for producing synthesis gas. To understand the roles of the nature of the precursor and calcination conditions on the formation of LaNixAl1-xO3, we carried out identifications using NMR, FT-IR, XRD, SEM, and TEM. The precursor struc...

Ammonia (NH3) is recognized as a carbon-free hydrogen-carrier fuel with high content of hydrogen atoms per unit volume. Recently, ammonia has received increasing attention promising alternative for internal combustion engine and gas turbine applications. However, the viability fueling future devices several barriers to overcome. To overcome challenge its low reactivity, it proposed blend high-r...

reactivity controlled compression ignition (rcci) is a novel combustion concept which uses port fuel injection (pfi) of a low reactivity fuel and direct injection (di) of a high reactivity fuel with optimum multiple injection to provide a stratified mixture inside the combustion chamber. piston bowl design has a considerable effect on engine’s pollutant emissions specially unburned hydrocarbons...

BACKGROUND AND PURPOSE Although cerebral circulation time (CCT) is one of the main parameters in cerebral blood flow measurements, its clinical significance is controversial. To assess the importance of CCT by using a nondiffusible indicator, we studied the relationship between angiographic CCT and cerebrovascular reserve. METHODS Twenty-eight patients, each with a unilateral occlusive lesion...

A large-eddy simulation is modified to include multiple scalars emitted by a plant canopy. Each of these scalars is subjected to varying rates of chemical loss. Presented is a detailed comparison between conserved species and species undergoing firstand second-order chemical loss. Profiles of mean mixing ratio, mixing-ratio variance and vertical mixing-ratio flux reveal the influence of chemica...

Background: Several studies reported the clinical features of IgE-mediated hypersensitivity after ingestion of melon. Melon allergy is a common IgE-mediated fruit allergy in Iran. This prompted us to investigate immunochemical and molecular properties of the major allergen in melon fruit, to compare the IgE-binding capacity of the natural protein with the recombinant allergen, and to determine ...