نتایج جستجو برای: 73649 ha
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Previously, we have developed a novel porous hydroxyapatite/poly l-lactic-co-caprolactone (HA/PLCL) composite sandwich beam as new scaffold material for bone regeneration. This work presents the study of bending fracture mechanisms and microdamage L-lactic-acid (HA/PLLA) beam, in comparison to previous HA/PLCL beam. Both beams were fabricated using method which single layered between two polyme...
background: analysis of human cancer serum has revealed the presence of high amounts of hyaluronan (hyaluronic acid, ha) when compared to human normal serum, it is well documented that ha and its receptors, known as hyaladherins (habps) are involved in matrix regulation, cell proliferation, migration and malignant tumour progression. these hyaladherins not only interact with hyaluronan at the m...
Purpose The aim of the present prospective study was to investigate the efficacy of hyaluronan (HA) using two different concentrations as embryo transfer media for in vitro fertilization embryo transfer cycles. Methods A total of 169 cycles undergoing fresh embryo transfer on day 2 or 3, 561 cycles undergoing frozen-thawed embryo transfer on day 2 or 3, and 484 cycles of frozen-thawed blastoc...
چکیده : تیتانیوم و آلیاژهای آن موادی منا سب جهت ساخت ایمپلنت ها است که خواص مطلوبی نظیر مدول نسبتاً پایین، دانسیته پایین و استحکام بالا را دارا می با شند. یکی از روش های بهبود خواص تیتانیوم تهیه کامپوزیت می با شد که خواص مکانیکی مورد نیاز از طریق تیتانیوم و زیست سازگاری و زیست فعالی از طریق سرامیکها تا?مین می گردد. در این تحقیق پودر نانو کامپوزیت تیتانیوم-هیدروکسی آپاتیت بروش آلیاژ سازی مکانیکی...
An increase in hyaluronan (HA) synthesis, cellular uptake, and metabolism occurs during the remodeling of tissue microenvironments following injury and during disease processes such as cancer. We hypothesized that multimodality HA-based probes selectively target and detectably accumulate at sites of high HA metabolism, thus providing a flexible imaging strategy for monitoring disease and repair...
Addition of bioactive materials such as calcium phosphates or Bioglass, and incorporation of porosity into polyetheretherketone (PEEK) has been identified as an effective approach to improve bone-implant interfaces and osseointegration of PEEK-based devices. In this paper, a novel production technique based on the extrusion freeforming method is proposed that yields a bioactive PEEK/hydroxyapat...
HAAlumina nanocomposite is biocompatible and has desirable mechanical and physical properties. Less cost, simple synthesis method, and fast production are the added advantages of this nanocomposite. Thus HA coatings on the surface of alumina substrates are used to combine excellent bioactivity of HA with superior mechanical properties of the alumina substrates. One of the elements associated wi...
ویروس آنفلوآنزا که عامل مولد یکی از بیماریهای حاد تنفسی می باشد در غشا خود واجد گلیکوپروتئین مهمی به نام همآگلوتینین است. این مولکول ضمن اینکه اصلی ترین آنتی ژن برای القا پاسخ ایمنی بر علیه ویروس است، همواره به عنوان مدل ایده آلی برای مطالعه فرآیندهای بیولوژیکی مهم از جمله گلیکوزیلاسیون مورد استفاده قرار گرفته است. گلیکوزیلاسیون ( به ویژه از نوع n) متداولترین تغییر ضمن یا پس از ترجمه ای پروتئین...
Calcium phosphate [single-phase hydroxyapatite (HA, Ca(10)(PO(4))(6)(OH)(2)), single-phase tricalcium phosphate (beta-TCP, Ca(3)(PO(4))(2)), and biphasic HA-TCP] whiskers were formed by using a novel microwave-assisted molten salt mediated process. Aqueous solutions containing NaNO(3), HNO(3), Ca(NO(3))(2) x 4H(2)O, and KH(2)PO(4) (with or without urea) were used as starting reagents. These sol...
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