نتایج جستجو برای: melting rate
تعداد نتایج: 985300 فیلتر نتایج به سال:
Current post-process heat treatments applied to selective laser melting produced Ti-6Al-4V do not achieve the same microstructure and therefore superior tensile behaviour of thermomechanical processed wrought Ti-6Al-4V. Due to the growing demand for selective laser melting produced parts in industry, research and development towards improved mechanical properties is ongoing. This study is aimed...
A systematic experimental study of dispersions of charged colloidal spheres is presented on the effect of steady shear flow on nucleation and crystal growth rates. In addition, the nonequilibrium phase diagram as it relates to the melting line is measured. Shear flow is found to strongly affect induction times, crystal growth rates, and the location of the melting line. The main findings are th...
بررسی تاثیر فاصله توقف جوشکاری انفجاری بر ساختار و رفتار خوردگی اتصال آلومینیوم 5083- مس در محیط نمک
In the present study, the effect of explosive welding stand-off distance on the structure and corrosion behavior of aluminum alloy 5083-copper joint is studied. The microstructure was examined by optical microscopy and scanning electron microscopy and corrosion behavior with poteniodynamic polarization tests and electrochemical impedance spectroscopy in a salt environment. Microscopic results s...
The a#cation of variational and Lagrangian thermodynamics is extended to problems of heat conduction with melting boundaries. The physical properties of the conducting material are considered to be temfierature dependent. In particular, the material Alumina (AhOJ representing a class of ceramic materials for which the effective conductivity ksff = kphonon + kphoton is subjected to above treatme...
BACKGROUND Additional instruments have become available since instruments for DNA melting analysis of PCR products for genotyping and mutation scanning were compared. We assessed the performance of these new instruments for genotyping and scanning for mutations. METHODS A 110-bp fragment of the beta-globin gene including the sickle cell anemia locus (HBB c. 20A>T) was amplified by PCR in the ...
فرمولاسیون و بررسی خصوصیات پراکندگی های جامد پیروکسیکام تهیه شده با پلی اتیلن گلیکول 4000 و توئین 40
Background and purpose: Piroxicam is a non-steroidal anti- inflammatory drug that is characterized by low solubility and high permeability. According to the biopharmaceutic drug classification system, piroxicam is a class 2 drug with low solubility and high permeability. The solid dispersion, ammroach is commonly used to improve the dissolution of poorly water soluble drugs using hydrophilic po...
some drugs have low bioavailability due to their poor aqueous solubility and/or slowdissolution rate in biological fluids. stiripentol (stp) is a novel anticonvulsant drug that isstructurally unrelated to the currently available antiepileptics. it has poor aqueous solubilityand its solubility has to be enhanced accordingly. polyethyleneglycol 6000 (peg-6000) iscommonly utilized as a hydrophilic...
A large number of studies have been dedicated to identify the structural and sequence based features of RNA thermometers, mRNAs that regulate their translation initiation rate with temperature. It has been shown that the melting of the ribosome-binding site (RBS) plays a prominent role in this thermosensing process. However, little is known as to how widespread this melting phenomenon is as ear...
High-temperature surface-enhanced Raman scattering (SERS) sensing is significant for practical detections, and pinhole-containing (PC) metal@oxide structures possessing both enhanced thermal stability and superior SERS sensitivity are served as promising SERS sensors at extreme sensing conditions. Through tuning the Al2O3 precursors' exposure time during atomic layer deposition (ALD), Al2O3 she...
Fractionation which separates the olein (liquid) and stearin (solid) fractions of oil is used to modify the physicochemical properties of fats in order to extend its applications. Studies showed that the properties of fractionated end products can be affected by fractionation processing conditions. In the present study, dry fractionation of palm-based diacylglycerol (PDAG) was performed at diff...
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