نتایج جستجو برای: sbr کربوکسیله
تعداد نتایج: 1816 فیلتر نتایج به سال:
در این تحقیق، یورتان آکریلات کربوکسیله تابشپز به وسیله دیمتیلول پروپیونیک اسید (DMPA)، ایزوفورن دیایزوسیانات ((IPDI، هیدروکسیاتیل متاکریلات (HEMA) در مجاورت کاتالیزور دیبوتیلتین دیلورات(DBTDL) و حلال استن سنتز شد. سپس گروههای کربوکسیلیک در پراکنشگر یورتان آکریلات تابشپز به وسیله تریاتیل آمین (TEA) خنثی شد. ساختار مولکولی پراکنشگر آنیونییورتان آکریلات به وسیله طیفسنجی تبدیل فوری...
Use of sulfur crosslinked nanogels to improve various properties of virgin elastomers was investigated for the first time. Natural rubber (NR) and styrene butadiene rubber (SBR) nanogels were prepared by prevulcanization of the respective rubber lattices. These nanogels were characterized by dynamic light scattering, atomic force microscopy (AFM), solvent swelling, mechanical, and dynamic mecha...
Angiotensin converting enzyme (ACE) has been shown to be involved in regulation of apoptosis in nonintestinal tissues. This study examined the role of ACE in the modulation of intestinal adaptation utilizing ACE knockout mice (ACE-/-). A 60% small bowel resection (SBR) was used, since this model results in a significant increase in intestinal epithelial cell (EC) apoptosis as well as proliferat...
Prior studies of intestinal adaptation after massive small bowel resection (SBR) have focused on growth factors and their effects on amplification of the gut mucosa. Because adaptive changes have also been described in intestinal smooth muscle, we sought to determine the effect of targeted smooth muscle growth factor overexpression on resection-induced intestinal adaptation. Male transgenic mic...
The fast physical optics (FPO) method for calculating the monostatic radar cross section (RCS) of an object over a range of frequencies is extended to the shooting and bouncing rays (SBR) method where the multi-bounce phenomena of the launched rays is considered. The FPO method is an improved version of the physical optics (PO) method, which is efficient when calculating the monostatic RCS over...
Analysis of genomes evolving by inversions leads to a general combina-torial problem of Sorting by Reversals, MIN-SBR, the problem of sorting a permutation by a minimum number of reversals. This combinatorial problem has a long history, and a number of other motivations. It was studied in a great detail recently in computational molecular biology. Following a series of preliminary results, Hann...
The two most important models of inferencing in approximate reasoning with fuzzy sets are Zadeh’s Compositional Rule of Inference (CRI) and Similarity Based Reasoning (SBR). It is known that inferencing in the above models is resource consuming (both memory and time), since these schemes often consist of discretisation of the input and output spaces followed by computations in each point. Also ...
This investigation proved that respirometry combined with sequencing batch reactor (SBR) could be an effective way for the removal of COD in tannery wastewater. Measurement of oxygen uptake rates (OUR) and corresponding COD uptake rates showed that a 12-h operating cycle was optimum for tannery wastewater. The removal of COD by degradation was stoichiometric with oxygen usage. A plot of OUR val...
The performance of nitrogen (N) removal was investigated by altering the influent step feeding in a sequencing batch reactor (SBR). optimum condition for analyzed using Technique Order Preference Similarity to Ideal Solution (TOPSIS) with entropy weight method, considering C/N ratio range 1.5 4.5. results showed that SBR multi-step-feeding system achieved high rate 92.7% at three-step mode. Nit...
Let t be a topologically mixing Anosov ow on a 3-D compact manifolds M. Every unstable ber (horocycle) of such a ow is dense in M. Sinai proved in 1992 that the one-dimensional SBR measures on long segments of unstable bers converge uniformly to the SBR measure of the ow. We establish an explicit bound on the rate of convergence in terms of integrals of HH older continuous functions on M.
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