نتایج جستجو برای: 2 pcm
تعداد نتایج: 2528372 فیلتر نتایج به سال:
کمبود منابع مصرف انرژی و افزایش مصرف انرژی، همواره یکی از نگرانی های پیش روی جوامع امروزی می باشد. از آنجا که بخش مهمی از انرژی مصرفی، در ساختمان ها مصرف می شود، تاکنون تلاش های زیادی برای یافتن راه های کاهش مصرف انرژی در ساختمان ها انجام شده است. یکی از موضوعات مورد بررسی در این زمینه، تاثیر کاربرد مواد تغییر فاز دهنده (pcm) در کاهش مصرف انرژی ساختمان است. در تحقیق حاضر مطالعه جامع و دقیقی د...
Centrosomes comprise a pair of centrioles surrounded by a matrix of pericentriolar material (PCM). In vertebrate cells, Pericentrin plays an important part in mitotic PCM assembly, but the Drosophila Pericentrin-like protein (PLP) appears to have a more minor role in mitotic fly cells. Here we investigate the function of PLP during the rapid mitotic cycles of the earlyDrosophila embryo. Unexpec...
Present study was aimed to investigate in vitro antioxidant and hepatoprotective activities of the ethanolic extracts of Astragalus subrobustus (A. subrobustus) and Astragalus woronowii (A. woronowii) on PCM induced liver damage in rats. The antioxidant activities of both extracts were assayed and their activities were compared to standard antioxidants, ascorbic acid and pyrogallol. Liver injur...
Protein carboxy-O-methyltransferase (PCM) activity was determined in subcellular fractions prepared from C-1300 neuroblastoma tumors following transplantation and growth in male A/J mice. Fractions were obtained by differential centrifugation, and PCM activity was determined in all fractions in the presence (+gel) and absence (-gel) of an exogenous substrate, gelatin. Sixty % of the PCM activit...
The literature shows that inorganic phase change materials (PCM) have been very seldom microencapsulated, so this study aims to contribute to filling this research gap. Bischofite, a by-product from the non-metallic industry identified as having good potential to be used as inorganic PCM, was microencapsulated by means of a fluidized bed method with acrylic as polymer and chloroform as solvent,...
Energy crisis, global warming and other environmental issues are what motivate researchers to find new strategies to reduce energy consumption in buildings. Recently, using phase change materials (PCM) in the building’s envelopes has drawn significant attention as an energy-saving method, which helps in increasing the building’s thermal capacity. In the present research, the effects of the main...
conclusions pcm has not been reported in iran until now, but it should be considered as a differential diagnosis when risk factors or symptoms of pcm are detected. case presentation a 72-year-old man had a four-year history of dyspnea, dry cough, and weakness and a recent weight loss of more than 10 kg. first, he was treated with glucocorticoid, but he did not continue this treatment. core need...
many researchers have investigated how to increase the overall efficiency of solar-driven thermal systems. several key parameters, such as collector efficiency and storage tank characteristics, may impose some constraints on the annual solar fraction (asf) of such systems. in this paper, the behaviour of integrating the phase change material (pcm) in sdhw systems is modelled and optimized numer...
Study of Fresh and Hardening Process Properties of Gypsum with Three Different PCM Inclusion Methods
Gypsum has two important states (fresh and hardened states), and the addition of phase change materials (PCM) can vary the properties of the material. Many authors have extensively studied properties in the hardened state; however, the variation of fresh state properties due to the addition of Micronal® DS 5001 X PCM into gypsum has been the object of few investigations. Properties in fresh sta...
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