نتایج جستجو برای: permeability index

تعداد نتایج: 444814  

Journal: :Optics express 2015
Seungwoo Lee

The recent advance in the assembly of metallic nanoparticles (NPs) has enabled sophisticated engineering of unprecedented light-matter interaction at the optical domain. In this work, I expand the design flexibility of NP optical metamaterial to push the upper limit of accessible refractive index to the unnaturally high regime. The precise control over the geometrical parameters of NP superlatt...

Journal: :Diabetes 1985
J R Williamson K Chang E Rowold J Marvel M Tomlinson W R Sherman K E Ackermann C Kilo

In recent studies we have demonstrated a marked increase in albumin permeation of new vessels formed by angiogenesis (in subcutaneous tissue) in the diabetic milieu. Likewise, lysyl oxidase-mediated collagen cross-linking is markedly increased in the scar tissue associated with angiogenesis. The present studies were undertaken to determine whether sorbinil, a chemical inhibitor of aldose reduct...

Journal: :Thorax 1983
J G Jones B D Minty D Royston J P Royston

The effect of cigarette smoke exposure on pulmonary epithelial permeability was studied in 45 smokers and 22 non-smokers. An index of cigarette smoke exposure was obtained from the carboxyhaemoglobin concentration (HbCO%). Pulmonary epithelial permeability was proportional to the half-time clearance rate of technetium-99m-labelled diethylene triamine pentacetate (99mTc DTPA) from lung to blood ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم زمین 1387

چکیده ندارد.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده فنی 1393

asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...

Journal: :مجله بین المللی علوم آزمایشگاهی 0
fahima danesh pouya javad zavar-reza beman ali jalali naser danesh pouya

backgrounds and aims: methylglyoxal (mgo) is an –α, β dicarbonyl aldehyde inevitably produced from triose-phosphate intermediates of glycolysis, and amino acid. increased mgo in blood leads to alterations in coagulation, clot permeability and thus, atherosclerosis in children with diabetes; however, the precise mechanism is not clear. the present study aimed to compare different concentrations ...

Journal: :jundishapur journal of natural pharmaceutical products 0
eskandar moghimipour nanotechnology research center, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of pharmaceutics, faculty of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, ir iran anayatollah salami nanotechnology research center, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of pharmaceutics, faculty of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; corresponding author: anayatollah salami, department of pharmaceutics, faculty of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-6133738381 mahsa monjezi department of pharmaceutics, faculty of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, ir iran

materials and methods liposomes were prepared by thin film method using soya lecithin and cholesterol. physicochemical characteristics of the liposomes such as, particle size, drug encapsulation efficiency were determined. also, drug release and in vitro skin permeability through rat skin were evaluated using franz diffusion cells. results the results showed that the maximum drug encapsulation ...

Journal: :فیزیک زمین و فضا 0
کیوان نجف زاده دانشجوی کارشناسی ارشد، گروه فیزیک زمین، موسسه ژئوفیزیک، دانشگاه تهران، ایران محمدعلی ریاحی دانشیار، گروه فیزیک زمین، موسسه ژئوفیزیک دانشگاه تهران، ایران محسن سیدعلی کارشناس ارشد مهندسی اکتشاف نفت، تهران، ایران

permeability is a key parameter in reservoir characterization. in fact, without accurate information about reservoir permeability, there is no good solution for reservoir engineering problems. up to now, permeability values of a reservoir have been calculated through laboratory measurements or well testing methods. these methods are useful but they cannot describe a reservoir reliably and preci...

Journal: :Transport in Porous Media 2022

Abstract It is well-known that the presence of geometry heterogeneity in porous media enhances solute mass mixing due to fluid velocity heterogeneity. However, laboratory measurements are still sparse on characterization role high-permeability inclusions transport, particularly concerning fractured media. In this study, transport solutes quantified after a pulse-like injection soluble fluoresce...

F. Khoshbakht, M. Mohammadnia

Permeability, the ability of rocks to flow hydrocarbons, is directly determined from core. Due to high cost associated with coring, many techniques have been suggested to predict permeability from the easy-to-obtain and frequent properties of reservoirs such as log derived porosity. This study was carried out to put clustering methods (dynamic clustering (DC), ascending hierarchical clustering ...

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