Conventional basin-type solar still (CSS) is the simplest type of water distillation system. In this study, CSS was modeled and simulated. The effect variations in mass inside basin, absorber absorptivity, glass reflectivity heat loss coefficient were investigated. Finally, system simulated using same data radiation intensity, ambient temperature wind speed each variation highest distilled resu...

' Several perplexing questions involving standardization techniques surface when ultraviolet spectrophotometry is used for the determination of unknown ribonucleic acids isolated from tissue sources. One must consider the effect of hydrolysis on total absorbance, nucleotide makeup of a ribonucleic acid versus molar absorptivity and additivity of riucleotides on total measured absorbance. Experi...

Abstract. Metamaterials are artificially engineered materials that have properties not found in naturally occurring materials. They designed to specific electromagnetic or other physical properties, such as negative refraction, superconductivity high absorptivity. often composed of structures on a scale much smaller than the wavelength phenomena they intended manipulate. wide range potential ap...

The effective absorptivity of IR laser light for different powder beds were studied. reflectivity aluminum, titanium, stainless steel and copper alloys was measured using an appropriate Ulbricht sphere. Laser irradiation reliably detected by a photodiode. Reflectivity carefully as function illuminated area bed density. Several size distributions thicknesses chosen to evaluate the impact on abso...

The interaction between N,N'-ethylenebis-[2-(o-hydroxyphenolic)glycine] (EHPG) and lanthanum was studied by the difference UV spectra and fluorescence spectra. At pH 7.4, 0.01 M N-2-hydroxyethylpiperazine-N-2-ethanesulfonic acid (Hepes), with the addition of 1.0 x 10(-3)M lanthanum, two new peaks were observed at 238 nm and 294 nm by absorptivity spectroscopy compared with blank solution EHPG s...

A simple, sensitive, rapid, accurate and precise spectrophotometric method has been developed for estimation of ropinirole hydrochloride in bulk and tablet dosage forms. Ropinirole hydrochloride shows maximum absorbance at 250 nm with molar absorptivity of 8.703x10(3) l/mol.cm. Beer's law was obeyed in the concentration range of 5-35 mug/ml. Results of analysis were validated statistically and ...

In this work, we describe the synthesis of a novel 9-aminoacridine derivative that presents surprisingly different colors when exposed to neutral, acidic or basic mediums with potential application as pH indicator in organic solvents. Furthermore, pKa and molar absorptivity values were determined and theoretical studies supported by density functional theory (DFT) calculations were performed to...

How does recent climate warming and climate variability alter fitness, phenotypic selection and evolution in natural populations? We combine biophysical, demographic and evolutionary models with recent climate data to address this question for the subalpine and alpine butterfly, Colias meadii, in the southern Rocky Mountains. We focus on predicting patterns of selection and evolution for a key ...