نتایج جستجو برای: solid
تعداد نتایج: 189337 فیلتر نتایج به سال:
Concentrated suspension of binders in composite propellant causes a complex phenomena so that controlling of rheology properties is difficult due to high percentage of fillers. Composite solid propellant contains paste suspension of mixtures of different components, e.g. oxidizer, fuel and binder. Increasing the percentage of solid phase without increment of viscosity is an important subject in...
this work is presented in five parts. in the first part preparation of the starting complex [pt(c^n)cl(dmso)], 1, in which c^n = n(1),c(2?)-chelated, deprotonated 2-phenylpyridine, and dmso = dimethylsulfoxide, and its reaction with 1 equiv of the biphosphine ligands bis(diphenylphosphino)amine, dppa, or bis(diphenylphosphino)methane, dppm, to give the complex [pt(c^n)cl(dppa)], 2, or [pt(c^n)c...
background: solid waste management has emerged as an important human and environmental health issue. municipal solid waste workers (mswws) are potentially exposed to a variety of occupational biohazards and safety risks. the aim of this study was to describe health practices and safety measures adopted by workers in the main municipal company in alexandria (egypt) as well as the pattern of the ...
this experiment was conducted in order to study the influence of different levels of municipal solid waste compost and nitrogen rate on grain quality of sweet corn (zea mays l. saccharata) and some soil properties under marvdasht conditions during growing season of 2008-2009. the experiment was arranged as split plots based on a randomized complete block design with two factors and three replic...
This study investigates the underlying factors elucidating why solid waste management in Eldoret Town, Kenya, has up to now remained inadequate notwithstanding the existing legal framework that mandates the County Government of Uasin Gishu to ensure that all residents have access to a clean and healthy environment. The study adopted a descriptive research design. While, primary data were collec...
Background and Aim: Inadequate management of biomedical waste can be associated with risks to healthcare workers, patients, communities and their environment. In this study a comprehensive survey was conducted to obtain information on the management of solid wastes in Qom hospitals.Materials and Methods: Field visits were made to 2 private and 4 governmental hospitals to collect the required in...
Semi-solid materials undergo strain localization and shear band formation as a result of granular nature of semi-solid deformation. In the present study, to analyze the shear localization, a unified viscoplastic constitutive model was developed for the homogeneous flow. Then, a linearized analysis of the stability performed by examining the necessary condition for the perturbation growth. For t...
Effective conversion of lignocellulosic material as renewable energy source has significant reflection on economic and environmental impact. Diluted acid hydrolysis at optimal condition was used to liberate fermentable sugar. The sorghum stalks, the alkali pretreatment of biomass and hydrolysis in diluted hydrochloric acid were investigated. The hydrolysis reaction was carried out in a 5L react...
a mathematical model is described and applied for adsorption process of ethyl acetate from supercritical co2 stream on activated carbon particles. this model has the ability of illustrating variation of effluent concentration towards different parameters such as flow rate, temperature and pressure. in this research, a vast area of operational conditions is experienced. mass transfer resistance ...
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