نتایج جستجو برای: scaling and descaling
تعداد نتایج: 16837838 فیلتر نتایج به سال:
In this study, two silicon-containing steels with different P contents were used, and reheating tests were conducted in an industrial furnace in a hot strip plant. The effect of P on the microstructure and melting temperature of Fe2SiO4 in silicon-containing steels was investigated using a backscattered electron (BSE) detector and energy-dispersive spectroscopy (EDS). The melting process of Fe2...
among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...
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...
When industrial pipelines are used to transport production materials, the scale can easily form on inner wall of a pipeline due long-term contact with liquid medium. Scaling in is common problem that poses great threat process and environmental protection. In this paper, influence temperature fouling removal pipes studied. A finite element simulation model was established for guided wave propag...
Abstract The efficiency and longevity of components in geothermal plants are significantly reduced by mineral deposition pipes, also known as scaling [1]. A number methods used to monitor fouling (a broader term for all types organic inorganic deposition) other industries, such the oil, gas food industries. These include direct indirect, offline, in-situ online, well inline methods, each which ...
Steels containing sufficient concentrations of silicon tend to form a low melting temperature oxide called fayalite, which then penetrates both the steel and any other oxide to form a mechanical key. As a consequence, routine descaling operations fail to remove all traces of FeO that remain attached to the final product and oxidise to form a red oxide blemish on the surface. The formation of ox...
The past decade has witnessed a resurgence of interest in the geographies of children’s lives, and particularly in engaging the voices and activities of young people in geographical research. Much this growing body of scholarship is characterised by a very parochial locus of interest – the neighbourhood, playground, shopping mall or journey to school. In this paper I explore some of the roots o...
abstract introduction: scaling and root planing is one of the most commonly used procedures during periodontal treatments. removal of calculus using conventional hand instruments is incomplete and rather time consuming. to find more efficient and less difficult instrumentation method, investigators have proposed lasers as an alternative or adjunct to hand instruments for scaling and root planin...
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