Knowledge of age sensitivity, the capacity of a behavioral test to reliably detect age-related changes, has utility in the design of experiments to elucidate processes of normal aging. We review the application of these tests in studies of normal aging and compare and contrast the age sensitivity of the Barnes maze, eyeblink classical conditioning, fear conditioning, Morris water maze, and roto...

Sn-3.0Ag-0.5Cu (SAC305) alloy is the most widely used solder in electronic assemblies. However, issues associated with cost and drop/shock durability have resulted in a continued search for alternative solder alloys. One approach to improve the drop/shock reliability has been to reduce the silver content in Sn-AgCu alloys. Another approach is doping Sn-Ag-Cu solder with additional elements. Mor...

introduction: hearing loss is one of the most common problems in elderly people. functional side effects of hearing loss are various. due to the fact that hearing loss is the common impairment in elderly people; the importance of its possible effects on auditory memory is undeniable. this study aims to focus on the hearing loss effects on auditory memory.   materials and methods: dichotic audit...

Accurate and inexpensive psychophysiological equipment and software are needed to measure and monitor the autonomic nervous system for gaming and therapeutic purposes. The purpose of this study was to determine whether heart rate variability (HRV) derived from photoplethesmography (PPG) technology was predictive of autonomic nervous system (ANS) aging or biological age. Second, we sought to det...

Potassium-azeloyl-diglycinate is an active ingredient as a sebum normalizer and skin lightening-agent to moisturize treat hyperpigmentation. Anti-aging (AA) cream cosmetic used prevent premature aging. The use of emulsifying agent necessary produce stable cream. One the commonly emulsifying-agents triethanolamine. This study aims formulate AA-cream potassium-azeloyl-diglycinate preparation vari...

objectives: composite restorations must have tooth-like optical properties namely color and translucency and maintain them for a long time. this study aimed to compare the effect of accelerated artificial aging (aaa) on the translucency of three methacrylate-based composites (filtek z250, filtek z250xt and filtek z350xt) and one silorane-based composite resin (filtek p90). materials and methods...

introduction: sandfish (holothuria scabra) is a marine species generally sold as a raw material that has been dried even though the meat contains steroid hormone with high economic value, which has the potential to become a source of safe natural steroid hormone. this study was aimed to look at the potency of sandfish as an anti-aging for menopausal women. sandfish could become a source of natu...

normal 0 false false false en-us x-none ar-sa background: aging induces physiological changes and affects all of organs. nutritional status and mental health deteriorate with aging. as malnutrition and depression are main problem in elderly this study was performed to assess the association between malnutrition and depression among rural elderly. materials and methods: three hundred and seventy...

skin aging is a continuous process that exhibits fine and deep wrinkles, thin and transparent skin, loss of underlying fat, dry skin and itch, following decreased collagen and elastin  synthesis. both extrinsic and intrinsic agents are considered in the pathogenesis on skin aging. extrinsic factors such as sun exposure, windy and dry weather, nutrition, and lifestyle may induce premature aging,...