نتایج جستجو برای: Diffusion study

تعداد نتایج: 4088996  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

a one dimensional dynamic model for a riser reactor in a fluidized bed catalytic cracking unit (fccu) for gasoil feed has been developed in two distinct conditions, one for industrial fccu and another for fccu using various frequencies of microwave energy spaced at the height of the riser reactor (fccu-mw). in addition, in order to increase the accuracy of component and bulk diffusion, instanta...

Journal: :Integrated environmental assessment and management 2009
John W Nichols Mark Bonnell Sabcho D Dimitrov Beate I Escher Xing Han Nynke I Kramer

Mandated efforts to assess chemicals for their potential to bioaccumulate within the environment are increasingly moving into the realm of data inadequacy. Consequently, there is an increasing reliance on predictive tools to complete regulatory requirements in a timely and cost-effective manner. The kinetic processes of absorption, distribution, metabolism, and elimination (ADME) determine the ...

The purpose of the present study was to formulate and evaluate donepezil loaded bio-nanoparticles for effective treatment of Alzheimer’s disease. For the preparation of bio-nanoparticles biomaterial was isolated from fruits of Carica papaya by an economic method. The biomaterial recovered from the concentrate was subjected for various physicochemical properties like color, solubility, ...

The purpose of the present study was to formulate and evaluate donepezil loaded bio-nanoparticles for effective treatment of Alzheimer’s disease. For the preparation of bio-nanoparticles biomaterial was isolated from fruits of Carica papaya by an economic method. The biomaterial recovered from the concentrate was subjected for various physicochemical properties like color, solubility, ...

Journal: :Indian journal of science and technology 2022

Objective: To study the micro structure of interfacial region Cu/Zn diffusion couple at 250◦C and its evolution with time. Methods: The was prepared by a bonding technique then annealed 250 ◦C in Argon atmosphere. resulting from reactions studied scanning electron microscopy energy dispersive X-ray. Findings: Two continuous inter metallic phase layers formed interface between Cu Zn metals. were...

Journal: :Bulletin of the Japan Institute of Metals 1989

Journal: :international clinical neurosciences journal 0
mohammadreza shahmohammadi functional neurosurgery research center, shohada tajrish hospital,shahid beheshti university of medical sciences, tehran mohamad ali fazeli functional neurosurgery research center, shohada tajrish hospital,shahid beheshti university of medical sciences, tehran zahra janamiri student of medical imaging (mri), shahid beheshti university of medical sciences, tehran, iran reza asgari gorji functional neurosurgery research center, shohada tajrish hospital,shahid beheshti university of medical sciences, tehran

background and purpose : there has been no report in which preoperative evaluation of adc for prediction of post therapeutic outcome was presented. the aim of our study was to retrospectively evaluation the use of the apparent diffusion coefficient (adc) for the prediction of malignancy and the outcome of malignant astrocytic tumors. methods: we reviewed mri of 26 male and 14 female patients wi...

2013
Chongxuan Liu Jianying Shang John M. Zachara

diffusion models: A study of uranyl species diffusion" (2011). [1] Rigorous numerical description of multispecies diffusion requires coupling of species, charge, and aqueous and surface complexation reactions that collectively affect diffusive fluxes. The applicability of a fully coupled diffusion model is, however, often constrained by the availability of species self-diffusion coefficients, a...

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