نتایج جستجو برای: ویسکر aln
تعداد نتایج: 3353 فیلتر نتایج به سال:
INTRODUCTION Lymph node metastases are the most significant prognostic factors in patients with breast carcinoma. A positive sentinel lymph node (SLN) biopsy is followed by an axillary lymph node (ALN) dissection. In sentinel lymph node negative cases the risk of positive non-sentinel ALN is very low though not absent. The aim of this study was to determine predictive factors for non-sentinel l...
We report on the oxidation behavior of AlN/CrN multilayers at 900 °C, deposited by radio frequency magnetron sputtering. It is shown that oxidation in this system is controlled by diffusion of Cr towards the surface and formation of Cr2O3. Cr diffusion is found to mainly occur along grain boundaries. Thus, coherent cubic AlN/CrN multilayer regions with coarse columnar grain structures are found...
To improve the growth rate and crystal quality of AlN, the competitive growth mechanisms of AlN under different parameters were studied. The mass transport limited mechanism was competed with the gas-phase parasitic reaction and became dominated at low reactor pressure. The mechanism of strain relaxation at the AlN/Si interface was studied by transmission electron microscopy (TEM). Improved dep...
در این پژوهش با بکارگیری این ماده به عنوان تقویت کننده در الیاف پلی پروپیلن، خواص مکانیکی، تصویری، طیفی، رئولوژیکی و حرارتی آن اندازه گیری و با نانوذرات sic مقایسه شد. هر دو نوع نانوذره و نانو ویسکر در درصدهای وزنی 2/0 ، 5/0 ، 8/0 و 1/1جهت دستیابی به پراکنش خوب با دستگاه اکسترودر دو مارپیچه مورد اختلاط قرار گرفتند. همچنین با بکارگیری روش طراحی آزمایش تاگوچی جهت کم کردن تعداد آزمایشات، نمونه های...
Thermal treatment of supersaturated Ti1!xAlxN films (x " 0.67) with a dominant ternary cubic-phase were performed in the 700– 1000 !C range. Grazing incidence X-ray diffraction (GIXRD) shows that, for annealing temperatures up to 800 !C, the film structure undergoes the formation of coherent cubic AlN (c-AlN) and TiN (c-TiN) nanocrystallites via spinodal decomposition and, at higher temperature...
Carin-ALN as proposed recently by Rouveirol and Ventos [2000] is an interesting new rule learning bias for ILP. By allowing description logic terms as predicates of literals in datalog rules, it extends the normal bias used in ILP as it allows the use of all quantified variables in the body of a clause, instead of the normal exist quantified variables and it has atleast and atmost restrictions ...
Aluminum nitride (AlN) hollow nanofibers were synthesized via plasma-enhanced atomic layer deposition using sacrificial electrospun polymeric nanofiber templates having different average fiber diameters (~70, ~330, and ~740 nm). Depositions were carried out at 200°C using trimethylaluminum and ammonia precursors. AlN-coated nanofibers were calcined subsequently at 500°C for 2 h to remove the sa...
Purpose. The aim of this study was to directly compare the efficacy and the safety of the two agents for postmenopausal women. Methods/Principal Findings. Electronic databases were searched for relevant articles that met our predefined inclusion criteria. Seven randomized controlled trials (RCTs) involving 4054 women were identified and included. Although Aln was more effective than Rlx in incr...
In order to increase the therapeutic effect of doxorubicin (DOX) on bone metastases, a multifunctional micelle was developed by combining pH-sensitive characteristics with bone active targeting capacity. The DOX loaded micelle was self-assembled by using doxorubicin-poly (ethylene glycol)-alendronate (DOX-hyd-PEG-ALN) as an amphiphilic material. The size and drug loading of DOX loaded DOX-hyd-P...
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