background: although composite restorations are really valuable for esthetic zones, they have shown less longevity rather than amalgam restorations. since it may be related to the method used for curing the composite, postcuring could increase the degree of conversion and result in more long‑lasting composite restorations. this study was planned to evaluate the effect of two different postcurin...

the static strain aging is a phenomenon that can change the mechanical properties of low carbon steels. thus, the static strain aging behavior of low carbon steel wires after drawing process is studied. to do so, the wires are austenitized at different temperatures and cooled in different rates. then the wires are drawn and aged at a specific temperature and time. before and after aging of each...

Background and Objectives: In this study, the proteolysis and lipolysis of Poosti cheese produced from raw sheep milk in mountainous eastern regions of Iran were investigated during 90 days of ripening. Materials and Methods: Sodium dodecyl sulfate polyacrylamide gel electrophoresis for proteolysis (SDS-PAGE) and gas chromatography (GC) for free fatty acids (FFAs) were applied to investigate th...

The color stability of seven commercial composite restorative materials under conditions of accelerated aging was evaluated by reflection spectrophotometry at baseline and 300, 600, and 900 h. During early aging the composites generally became darker, more chromatic, and more opaque. Changes in color of the conventional composites during aging were influenced by erosion of the resin matrices an...

Aging of gaseous detectors is known as the degradation of their performance under the exposure to ionizing radiation. It is a complex phenomenon that depends on many parameters. Among others, aging depends on the gas mixture and may be enhanced by the presence of pollutants in the gas. The origin of the impurities is diverse and includes outgassing from assembly materials and the gas system com...

This article presents a series of experimental investigations on the viscoelastic behavior silica-filled and silver-filled silicone rubber unaged aged states. The study specific aging conditions relative to electronics industry is proposed in this work, namely hermetic, initially inert atmosphere, at high temperatures. Viscoelastic properties materials are measured through DMA tests. Strain swe...

objective(s): in the current study, the effects of selected folk medicinal herbs were evaluated in d-galactose-induced aging in male mice.   materials and methods: male balb/c mice were randomly divided into 12 groups composing sham, control, and treated groups. aging was induced by administration of d-galactose (500 mg/kg/day for 6 weeks). a positive control group was assigned that received vi...

conclusions reported herbal drugs might be beneficial for further studies for the management of skin aging and aging process. results skin aging begins with whole body aging process and entire body gets cold and dry in elderly. wrinkle formation is highly associated with loss of “skin natural moisture”. in the management, specific food supplements, simple massage therapy as well as herbal drugs...