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تعداد نتایج: 137435 فیلتر نتایج به سال:
Globular proteins in solution are only marginally stable and represent complex macromolecular systems whose structure and function is determined by the sum of hydrophobic, electrostatic, and hydrogen bond interactions. Because folding in a natural environment is very complex and often happens too fast, the experimental approaches for studying the responsible forces have focused mainly on the un...
The aim of this investigation was to evaluate the metal-ceramic bonding of Au-1.6 wt% Ti alloy. Therefore, the coefficient of thermal expansion, modulus of elasticity, ceramic bonding strength, and hardness of Au-1.6 wt% Ti alloy were measured. The metal-ceramic interface was observed by EPMA to investigate its bonding mechanism. The Au-1.6 wt% Ti alloy showed a coefficient of thermal expansion...
OBJECTIVE To characterize clinically and hormonally the syndrome of autosomal recessive familial growth hormone deficiency (FGHD) recently identified in Itabaianinha, Sergipe, Brazil, caused by a novel mutation (mt) that inactivates the growth hormone-releasing hormone receptor (GHRH-R) gene. DESIGN Clinical and hormonal evaluations were performed in 21 FGHD individuals (mt/mt group) aged 8 t...
OBJECTIVE Here, we aimed to clarify the role of CXC chemokine receptor (CXCR) 2 in macrophage migration-inhibitory factor (MIF)-mediated effects after myocardial ischemia and reperfusion. As a pleiotropic chemokine-like cytokine, MIF has been identified to activate multiple receptors, including CD74 and CXCR2. In models of myocardial infarction, MIF exerts both proinflammatory effects and prote...
Preparations of human tissue factor isolated by immunoaffinity chromatography contain variable amounts of 47,000 mol wt, 55,000 mol wt, and multimeric tissue factor when analyzed without reduction on polyacrylamide gels in sodium dodecyl sulfate (SDS). When analyzed after reduction, the 47,000 mol wt tissue factor apoprotein and a protein of about 12,000 mol wt are observed. Elution of tissue f...
Age-hardening characteristics in a dental low-gold alloy composed of 40.0 wt% Au-35.0 wt% Ag-7.9 wt% Pd-7.0 wt% Cu-5.0 wt% In-3.5 wt% Zn-1.5 wt% Sn, were investigated by means of the hardness test, XRD study, SEM observations and EPMA. The following results were obtained. The age-hardening was characterized by a precipitation of Cu-rich alpha2 phase in the a phase. The softening that occurred f...
---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Composite materials are widely used because of their extreme properties. Researchers working on fabrication of new composite materials worldwide to enhance the applicability of these materials. There are very few works about the effect of nanoclay ...
OBJECTIVES The purpose of this study was to test whether the transmural delineation of myocardial perfusion during dobutamine stress imaging with real-time myocardial contrast echocardiography (RTMCE) might permit visualization of dobutamine-induced subendocardial ischemia. BACKGROUND Significant coronary artery disease can be present despite normal transmural wall thickening (WT) responses d...
Calcium phosphate bone cements (CPCs) with antibacterial properties are demanded for clinical applications. In this study, we demonstrated the use of a relatively simple processing route based on preparation of silver-doped CPCs (CPCs-Ag) through the preparation of solid dispersed active powder phase. Real-time monitoring of structural transformations and kinetics of several CPCs-Ag formulation...
Curcumin is a flavonoid found in the rhizome of the turmeric plant (Curcuma longa L.) and has recently attracted interest because it has numerous biological functions and therapeutic properties. In the present study, we attempted to incorporate curcumin into medium-chain triglyceride (MCT) nanoemulsions (0.15 wt% curcumin, 10 wt% MCT oil, and 10 wt% emulsifiers) with various emulsifiers [polyox...
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