نتایج جستجو برای: surface area

تعداد نتایج: 1146405  

Journal: :Proceedings of the National Academy of Sciences 1945

Journal: :iranian biomedical journal 0
محمد حسن پیپل زاده mohammad h. pipelzadeh ابوالقاسم جویبان abolghasem jouyban علی خدادادی ali khodadadi ian l. naylor

the absence of a universally accepted mathematical model for assessment of the effectiveness of drugs in the process of wound healing is one of the problems the health professionals have been faced. in this study, an “empirical” mathematical model is presented to evaluate its reliability from an experimental viewpoint and from a comparative aspect with previous models used to study wound healin...

2005
ZHIHONG XIA

We prove some generic properties for Cr , r = 1, 2, . . . ,∞, areapreserving diffeomorphism on compact surfaces. The main result is that the union of the stable (or unstable) manifolds of hyperbolic periodic points are dense in the surface. This extends the result of Franks and Le Calvez [8] on S to general surfaces. The proof uses the theory of prime ends and Lefschetz fixed point theorem.

2003
IGOR RIVIN

A. We study the surface area of an ellipsoid in E as the function of the lengths of theirmajor semi-axes. Wewrite down an explicit formula as an integral over Sn−1, use the formula to derive convexity properties of the surface area, to sharpen the estimates given [6], to produce asymptotic formulas in large dimensions, and to give an expression for the surface in terms of the Lauricella ...

2014
Pravesh Kothari Amir Nayyeri Ryan O'Donnell Chenggang Wu

We consider the problem of estimating the surface area of an unknown n-dimensional set F given membership oracle access. In contrast to previous work, we do not assume that F is convex, and in fact make no assumptions at all about F . By necessity this means that we work in the property testing model; we seek an algorithm which, given parameters A and , satisfies: • if surf(F ) ≤ A then the alg...

Journal: :journal of ultrafine grained and nanostructured materials 2014
mohammad fathi morteza saghafi farzad mahboubi

we report the enhanced capacitance of the multi-walled carbon nanotubes (mwcnts) after a chemical unzipping process in concentrated sulfuric acid (h2so4) and potassium permanganate (kmno4). the effects of the test duration and temperature were investigated on the unzipping process of the mwcnts to synthesize the graphene oxide nanoribbons. the sem and tem studies were carried out on untreated a...

Journal: :nanomedicine journal 0
abbas pardakhty pharmaceutics research center, institute of neuropharmacology, kerman university of medical sciences, kerman, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی کرمان (kerman university of medical sciences) mehdi ranjbar department of chemistry, kerman branch, islamic azad university, kerman, iranسازمان اصلی تایید شده: دانشگاه آزاد اسلامی علوم و تحقیقات (islamic azad university science and research branch)

objective(s): according to the unique properties of magnetic nanoparticles, nickel metal-organic frameworks (mof) was synthesized successfully by ultrasound irradiation. metal-organic frameworks (mofs) are organic–inorganic hybrid extended networks that are constructed via covalent linkages between metal ions/metal clusters and organic ligands called a linker. materials and methods: the nanopar...

Journal: :physiology and pharmacology 0
mehnaaz sameera arifuddin department of physiology, deccan college of medical sciences, hyderabad, telangana, india mohammed abdul hannan hazari department of physiology, deccan college of medical sciences, hyderabad, telangana, india

introduction: musculoskeletal growth is variable during adolescent period and reaches its maximum by 18 years, whereas hemopoietic parameters reach adult values by 15 years. after adolescence period, the blood parameters may vary with nutrition and built of the individual. the purpose of this study was to find out any correlation between anthropometric and hematological parameters after the ado...

Journal: :iranian biomedical journal 0
محمدحسن پیپل زاده mohammad hassan pipelzadeh محمدرضا پیپل زاده mohammad reza pipelzadeh پوپک حسین زاده popak husseinzadeh

an in vitro study on the role of intracellular calcium ions in healing of excisional wound in rabbit was undertaken. we employed two drugs namely, glibenclamide and nitroglycerin that are topically applied in vivo to modulate the activity of intracellular calcium. our model consisted of a 15 ´ 15 mm excisional wound. seven groups of new zealand rabbits were used. the first three groups served a...

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