The aim of current study was the validation of TLC densitometric method for identification and determination of Estradiol hemihydrate in dosage forms. The TLC conditions were: glass plates with Silicagel G60F254; mobile phase: chloroform : water = 90 : 10 v/v. Linearity accordance between the concentration and spot area in range: 5.10-4 g/ml ÷ 5.10-3 g/ml is proved by the regression equation: y...

In this paper, we investigate implications of running a cooling system two silicagel/water adsorption chillers powered by district heating network. The devices are connected in series, i.e., the water output from primary chiller is directed to secondary one. consequence, device must deal with an even lower driving temperature and fluctuations caused device. We have evaluated three factors that ...

Government regulations to address technological risks are important for the successful development and application of nanotechnology, but there is an ongoing debate in the USA about who is responsible for the regulation of nanotechnology. In a mail survey of leading US nano-scientists, we examine scientists’ perceptions about nano-regulation, including the government level (local, national, or ...

objective: maintaining the health of oral tissues is a major goal in dentistry. however, limitations in dental materials, instruments, procedures and medications prevent achievement of this goal. advances in nanotechnology have paved the way to approach this goal. this study reviews the advances on nanotechnology in dentistry. review of literatures: in this review study, google scholar, pubmed,...

An adsorption refrigeration system (ARS) working on silica-gel/methanol pair has been investigated analytically and experimentally. By applying the mass balance in adsorber bed mechanism of thermal compressor with respect to time length was determined. experimental analysis performed using a gravimetric analyzer (TGA) evaluate transfer coefficient optimum cycle for silica-gel/ methanol at diffe...