نتایج جستجو برای: p2o5 sio2
تعداد نتایج: 14894 فیلتر نتایج به سال:
The in vitro response in simulated body fluid (SBF) of silicate glass coatings on Ti6A14V was evaluated. Glasses belonging to the SiO2-CaO-MgO-Na2O-K2O-P2O5 system were used to prepare 50-70 m thick coatings on Ti6Al4V, employing a simple enameling technique. Glasses with silica content higher than 55 wt% can be used to prepare coatings that do not crack or delaminate and exhibit good adhesion ...
This paper reports the results of a study of the feasibility of recycling the solid residues from domiciliary waste incineration by producing a glass-ceramic. The major components of the raw material (TIRME F+L), which was from a Spanish domiciliary incinerator, were CaO, SiO2 and Al2O3 but nucleating agents, such as TiO2, P2O5, and Fe2O3 were also present in reasonable amounts. It was found th...
Major and trace elements (Na, Mg, Al, Si, P, K, Ca, Ti, Mn, Fe, Rb, Sr, Y, Zr, La, Ce, Pr, Nd, Sm, Gd, Dy, Th and U) in igneous rocks were assayed with fused lithium borate glass beads using X-ray fluorescence spectrometry. Low dilution glass beads, which had a 1:1 sample-to-flux ratio, were prepared for determination of rare earth elements. Complete vitrification of 1:1 mixture required heatin...
Identification of a suitable cell source combined with an appropriate 3D scaffold is an essential prerequisite for successful engineering of skeletal tissues. Both osteogenesis and angiogenesis are key processes for bone regeneration. This study investigated the vascularization potential of a novel combination of human dental pulp stromal cells (HDPSCs) with 45S5 Bioglass® scaffolds for tissue-...
At present, typical approaches employed to repair fractures and other bone lesions tend to use matrix grafts to promote tissue regeneration. These grafts act as templates, which promote cellular adhesion, growth and proliferation, osteoconduction, and even osteoinduction, which commonly results in de novo osteogenesis. The present work aimed to study the bone-repairing ability of hybrid matrixe...
شیشه-سرامیک های زیست فعال، توانایی ایجاد پیوند شیمیایی با بافت زنده استخوان، از طریق تشکیل لایه آپاتیت مانند بر سطحشان را دارند. هدف این پژوهش، تهیه و مشخصه یابی شیشه-سرامیک زیست فعال در سیستم (64-x) sio2-31cao-5p2o5-xzno (x=0, 4, 8, 12) به روش سل-ژل می باشد. پودر نانو شیشه-سرامیک های زیست فعال تهیه شده، پرس شده و به شکل دیسک هایی آماده شدند تا در آزمایش برون تنی در محلول شبیه سازی شده با بدن...
Fourteen samples of No. 6 coal seam were obtained from the Chuancaogedan Mine, Jungar Coalfield, Inner Mongolia, China. The samples were analyzed by optical microscopic observation, X-ray diffraction (XRD), scanning electron microscope equipped with an energy-dispersive X-ray spectrometer (SEM-EDS), inductively coupled plasma mass spectrometry (ICP-MS) and X-ray fluorescence spectrometry (XRF) ...
Introduction: Northwest Africa 773 is one of the more unusual lunar meteorites found in recent years because it contains a prominent clast lithology, which appears to be an olivine-rich cumulate [1-4] and because it is a very-low-Ti (VLT) mare breccia with relatively high incompatible-trace-element concentrations and LREE/HREE enrichment [3]. A lunar origin was verified by Fagan and coworkers [...
امروزه هم زمان با پیشرفت های پزشکی تولید سطوح زیستی با استفاده از پوشش های بیواکتیو، جهت تولید محصولات پزشکی و ایمپلنت هایی که به شکل گیری استخوان کمک می کنند، مورد توجه قرار گرفته است. مهم ترین ویژگی ایمپلنت ها مقاومت به خوردگی آن ها در محیط بدن موجود زنده است. همچنین ایمپلنت ها در عین غیر سمی بودن و عدم ایجاد حساسیت، به رشد سلول های محافظ بدن و یاخته های بیگانه خوار (phagocytic cell) و بافت م...
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