The objective of the study is to investigate and optimize solar flux uniformity a fixed linear-focus Fresnel lens concentrator using triangle cavity receiver. effects receiver parameters including vertical distance from opening plane f, internal surface absorptivity αab, end reflection reflectivity ρr, declination angle δ ω on factor (UF) were carried out. are evaluated with significance test c...

In this paper, we numerically demonstrated a simple metamaterial for wide-angle and polarization-insensitive absorption in the visible region, which simultaneously showed strongly suppressed near-infrared region. Numerical simulations that under normal incidence proposed absorber had high absorptivity almost over 90% wavelength range from 340 nm to 770 nm, while low less than 10% 1 μm 2 μm. Bec...

The study aimed to assess the overheating vulnerability of an existing multi-apartment building built in 1971 Podgorica, Montenegro. consists 80 apartments and is mostly still its original state. Firstly, was modelled EneryPlus, a parametric performed with jEPlus. energy need for heating cooling simulated using parameters such as thermal insulation level, window properties, external surface sol...

In this paper, the solar absorption level of PEDOT:PSS/Ge organic and inorganic hybrid cells (HSCs) with different parameters cruciform microstructure (CM) is studied, using finite-difference time domain (FDTD) method. The light in HSCs CM above 90% range 300 nm to 1300 nm. Under AM1.5 spectrum, average absorptivity energy also at a very high level. At same time, we use DEVICE software calculat...

Two simple, sensitive, rapid, accurate and precise spectrophotometric methods were developed for the analysis of parts per million levels of widely used carbamate pesticide Carbendazim. The first proposed method A is based on the Oxidation followed by complex formation product with 2,2-Bipyridyl – Fe(III) to form orange colored chromophore exhibiting absorption maximum at 512 nm with apparent m...

Of two sensitive complexometric reagents for the colorimetry of serum zinc that we investigated, one, 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP), was found to be a potentially useful compound for trace-metal determinations. It has a high molar absorptivity (120 000 L mol-1 cm-1) but is not convenient to use because it is not very soluble in water. The other reagent, a related pyri...

We report a micromethod for the analysis of cyclosporine (CsA), based on quantification of its constituent amino acids. The amino acids were released by gas-phase hydrolysis, derivatized with fluorenylmethyl chloroformate, and separated and analyzed in a reversed-phase HPLC system. The imprecision (CV) of the amino acid analysis was less than 4%, and several determinations of the amount of stan...