نتایج جستجو برای: scaling
تعداد نتایج: 75266 فیلتر نتایج به سال:
Background & Aims of the Study: Corrosion and scaling are the most common problems of water facilities. Corrosion imposes many financial and health loss on system and consumer respectively, scaling also causes clogging and head loss in network. The purpose of this study is to determine the corrosion and scaling potential of water supply sources of Qom villages. Materials &...
سابقه و هدف: با توجه به اثر استعمال دخانیات بر بروز و شدت بیماری پریودنتال، همچنین افزایش سطح cd44 محلول در بزاق به عنوان یک مارکر تشخیصی در بعضی بیماری ها نظیر بیماری پریودنتال، مطالعه حاضر با هدف بررسی سطح cd44 محلول در بزاق افراد سیگاری و غیر سیگاری با و بدون پریودنتیت مزمن متوسط، قبل و یک ماه بعد از درمان srp (scaling and root planning) انجام شد. مواد و روش ها: این مطالعه مورد- شاهدی به اند...
the current paper proposes a technique for the numerical solution of linear control systems.the method is based on galerkin method, which uses the interpolating scaling functions. fora highly accurate connection between functions and their derivatives, an operational matrix forthe derivatives is established to reduce the problem to a set of algebraic equations. several testproblems are given, a...
background: transferrin is a negative acute phase protein, which decreases during inflammation and infection. the aim of the present study was to evaluate changes in the transferrin serum levels subsequent to non-surgical treatment of chronic periodontal disease. methods: twenty patients with chronic periodontitis and 20 systemically healthy subjects without periodontal disease, who had referre...
In English as a Second Language Teaching and Testing situations, it is common to infer about learners’ reading ability based on his or her total score on a reading test. This assumes the unidimensional and reproducible nature of reading items. However, few researches have been conducted to probe the issue through psychometric analyses. In the present study, the IELTS exemplar module C (1994) wa...
Background & Aim: Corrosion and scaling in water distribution system are very important as a matter of financial and health issues. This study was carried out to evaluate the corrosion and scaling potential in the water distribution system of Torbat Heydariyeh city in 2012. Methods: This cross- sectional/ descriptive study used cluster sampling in which the city was divided into 15 clusters....
Ichthyosis is defined as a group of diseases with keratinization disorder and diffuse scaling with highly variable degree of involvement. According to our knowledge, coincidence of ichthyosis and dermatophytosis, which both are very common disorders, is a very rare event. We report a young man with congenital ichthyosis that histological analysis of his skin biopsies and direct smear revealed P...
Corrosion is a physicochemical reaction occurring between the metal and its surroundings, which usually has an electrochemical nature and results in changes in the properties of the metal. The corrosive water dissolves the pipe’s material during flowing and this causes many problems. This study investigated the potential of corrosion and scaling of 46 water supply resources in the villages of S...
Corrosion and scaling in drinking water sources can lead to economic and health damages. These processes produce by-products in distribution systems, reduce chemical water quality, and are the cause of health issues among consumers. The aim of this study was to evaluate the corrosion and scaling potential of water supply sources of Marivan villages, Iran. In total, 106 water samples were collec...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید