نتایج جستجو برای: دستگاههای تمام اتوماتیک cnc
تعداد نتایج: 49484 فیلتر نتایج به سال:
X-linked Opitz syndrome (XLOS), caused by mutation in the MID1 gene, is a midline malformation syndrome with obvious craniofacial abnormalities. Because cranial neural crest cells (CNC) play a pivotal role in cranial morphogenesis, we examined the spatio-temporal expression of cMid1 in chick embryos and investigated if alterations in Mid1 protein function, specifically the ability of Mid1 to ne...
Reaction of [AuCl(PPh(3))] with the zwitterion S(2)CNC(4)H(8)NH(2) yields [(Ph(3)P)Au(S(2)CNC(4)H(8)NH(2))]BF(4). Treatment of this species with NEt(3) and CS(2) followed by [AuCl(PPh(3))] leads to [{(Ph(3)P)Au}(2)(S(2)CNC(4)H(8)NCS(2))], which can also be obtained directly from [AuCl(PPh(3))] and KS(2)CNC(4)H(8)NCS(2)K. A heterobimetallic variant, [(dppm)(2)Ru(S(2)CNC(4)H(8)NCS(2))Au(PPh(3))](...
A simple protocol was used to prepare amine functionalized cellulose nanocrystals (CNC-NH2). In the first step, epichlorohydrin (EPH) was reacted with ammonium hydroxide to produce 2-hydroxy-3-chloro propylamine (HCPA). In the next step, HCPA was grafted to CNC using the etherification reaction in an organic solution media. Various reaction parameters, such as time, temperature, and reactant mo...
We present two series of MOST (Microvariability & Oscillations of STars) space-based photometry, covering nearly continuously 10 days in 2004 and 30 days in 2007, of selected variable stars in the upper Main Sequence of the old open cluster M67. New high-precision light curves were obtained for the blue-straggler binary/triple systems AH Cnc, ES Cnc and EV Cnc. The precision and phase coverage ...
نانوکامپوزیتهای پلی اتیلن (PE) حاوی ذرات نانوکریستال سلولز (CNC) از طریق مخلوط و ذوب شدن در یک اکسترودر دو مارپیچ تهیه شدهاند. در این تحقیق کاربردهای نانوکامپوزیتهای PE/CNC برای بستهبندی مواد غذایی با استفاده از تحلیلهای حرارتی و مکانیکی مورد بررسی قرار گرفتند. افزودن نانوذرات CNC تاثیری بر دمای ذوب و دمای کریستالیزاسیون نانوکامپوزیت نداشت، اما تاثیر زیادی بر درصد بلوری بودن پلی اتیلن نشان...
Polyethylene (PE) nanocomposites containing Cellulose Nano Crystal (CNC) were prepared via melt blending in a twin screw extruder. The evaluation of PE/CNC nanocomposites was studied for food packaging applications. The nanocomposites were investigated by thermal, mechanical analyses. Addition of CNC particle while having no effect on melting and crystallization temperature had intensive effect...
the present study used a constant level of citric acid and polyvinyl alcohol and different amounts of nanocrystalline cellulose (cnc) and tio2 nanoparticles to improve the properties of starch film. the effect of different amounts of glycerol was also examined. the results of differential scanning colorimetry demonstrated that the addition of cnc increased the melting and glass transition tempe...
کنترلرهای ماشین های کنترل عددی کامپیوتری (cnc) به عنوان هسته اصلی کنترل و هدایت دستگاه های خودکار مورد استفاده قرار می گیرند. تکنولوژی سیستم cnc به عنوان معیار اصلی اندازه گیری سطح تکنولوژی دستگاه های یک کشور به شمار می رود. در سامانه های cad/cam امروزی، نیاز برای شکل های پیچیده در بسیاری از حوزه های کاربردی از قبیل صنایع هوافضا و خودروسازی، تکنیک های طراحی سطح و منحنی پارامتری را گسترش داده ...
In the vertebrate head, mesoderm cells fuse together to form a myofiber, which is attached to specific cranial neural crest (CNC)-derived skeletal elements in a highly coordinated manner. Although it has long been recognized that CNC plays a role in the formation of the head musculature, the precise molecular underpinnings of this process remain elusive. In the present study we explored the nat...
Conditional inactivation of Tgfbr2 in cranial neural crest causes cleft palate and calvaria defects.
Cleft palate and skull malformations represent some of the most frequent congenital birth defects in the human population. Previous studies have shown that TGFbeta signaling regulates the fate of the medial edge epithelium during palatal fusion and postnatal cranial suture closure during skull development. It is not understood, however, what the functional significance of TGFbeta signaling is i...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید