نتایج جستجو برای: corneal volume distribution

تعداد نتایج: 926745  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم و فنون مازندران 0

مدل روزنه های موازی موج دار (corrugated oarallel bundle model) برای تعریف اثر ساختمان روزنه ها در نفوذ-واکنش (diffusion and reaction) در کاتالیستهای متخلخل بکار می رود. در مدل روزنه های موج دار، از یک دسته روزنه های اصلی (pore) استفاده شده است . هر یک از این روزنه های اصلی دارای یکسری عناصر روزنه می باشد که هر عنصر دارای یک شعاع تعیین شده به صورت اتفاقی از یک توزیع اندازه روزنه ها (pore size di...

2009
Peng Lu

Theorem 2 Given n and v0 > 0, there exists ǫ0 > 0 depending only on n and v0 which has the following property. For any r0 > 0 and ǫ ∈ (0, ǫ0] suppose (Mn, g(t)) is a complete smooth solution to the Ricci flow on [0, (ǫr0) 2] with bounded sectional curvature, and assume that at t = 0 for some x0 ∈ M we have curvature bound |Rm |(x, 0) ≤ r 0 for all x ∈ Bg(0)(x0, r0), and volume lower bound Volg(...

Esmaeil Tamadonfard, Firooz Hamzeh goshchi Nasrin Hamzeh gooshchi

In the present study, the effects of the acute and chronic oral administrations (po) of curcumin in the absence and presence of morphine and naloxone was investigated on the sensation of acute corneal pain in rats. Acute corneal pain was induced by the local application of hypertonic saline (5 M NaCl) on the corneal surface, and the number of eye wipes was then counted for 30 s. Subcutaneous (s...

2013
Shinji Makino

Copyright: © 2012 Makino S. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Abstract We report a case of severe acute corneal hydrops in a 32-year-old woman with keratoconus associated with Down syndrome. The ...

Journal: :Investigative ophthalmology & visual science 1995
H Watanabe M Fabricant A S Tisdale S J Spurr-Michaud K Lindberg I K Gipson

PURPOSE The authors have determined that the corneal and conjunctival epithelia of the rat produce a mucin-like glycoprotein at the apical surface of the epithelium. The purpose of this study was to determine if human ocular surface epithelium produces similar glycoproteins. METHODS Because our initial attempts at production of monoclonal antibodies yielded blood type A-specific antibodies, c...

2016
K. Ravinder

Introduction: To effectively prevent blindness in patients with corneal ulcer, a proper understanding of risk factors predisposing to ulceration, and clinical and microbial characteristics of the disease is essential. Aim is to know the age and sex distribution of corneal ulcer. To identify the predisposing factors, etiological factors contributing to corneal ulcer. To study the clinical featur...

Journal: :Investigative ophthalmology & visual science 2003
Thaya Ramaesh J Martin Collinson Kanna Ramaesh Matthew H Kaufman John D West Baljean Dhillon

PURPOSE To investigate corneal abnormalities in heterozygous Pax6(+/Sey-Neu) (Pax6(+/-), small eye) mice and compare them with aniridia-related keratopathy in PAX6(+/-) patients. METHODS Fetal and postnatal corneal histopathology, adult corneal thickness, and the distribution of K12-immunostained cells were compared in wild-type and Pax6(+/-) mice. RESULTS Prenatally, the corneal epithelium...

Journal: :Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians 2013
Hamed Niyazmand Hadi Ostadi Moghaddam Mohammad Reza Sedaghat Seyed Mahdi Ahmadi Hosseini Fereshteh Abolbashari

PURPOSE To investigate the changes in anterior segment following short-term reading and evaluate the correlation of such changes with corneal biomechanical characteristics (CBC). METHODS Thirty-six right eyes of 36 healthy subjects were examined. Anterior segment parameters were measured using the Pentacam before and after 30 min of reading. Ocular Response Analyzer was used to record CBC aft...

خطیبیان, پژمان, سرخابی, رعنا,

Background and Objective: Keratoconus is a disorder in cornea characterized by constant thinning and prominence that can result in vision defect. Due to ultrasonic changes in the corneal structure caused by keratoconus disease, its rigidity and biomechanical properties are subject to some changes. In this regard, the present study was conducted to determine the correlation of biomechanical feat...

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