apigenin is best known as an irreversible inhibitor of monoamine oxidase (mao), an intracellular enzyme associated with the outer membrane of mitochondria. the purpose of this study is to establish a reliable and quick method for the assignment of apigenin in cosmos bipinnatus, apium graveolens and petroselinum crispum by high performance liquid chromatography with ultraviolet detection (hplc-u...

Cosine response is an important characteristic of optical detector for irradiance measurements. The non-ideal cosine a may lead to errors in In this paper, theoretical simulation generated due isotropic point light sources carried out different illumination conditions. Simulation results show that the measurements error detectors become significantly high at edges and corners floor when source ...

Ion chambers (ICs) are often employed to measure the concentration of tritium within flowing gases. In real-world environments, active surfaces ICs become covered with tritiated surface contaminants. This contamination creates a large background response that can mask signs interest, which is in gas phase. Previous efforts reduce effects utilize inert coatings (e.g., gold) and low area electrod...

Since lots of events in nature are followed by the emission of electromagnetic (e.m.) radiation in certain wavelengths regions, the necessity to observe, measure and analyze such events have driven the development of suitable radiation detectors. Electromagnetic radiation in the visible spectral region and its spectroscopical neighbourhood, Ultraviolet as well as Infrared, are of major interest...

In this paper, we report a new boron nitride molecular structure called BN-nanobelt, an inorganic analog of (12) cyclophenacene synthesized in 2017. An extensive investigation using Density Functional Theory (DFT) and Quantum Molecular Dynamics (QMD) calculations showed that BN-nanobelt is structurally thermally stable molecule with all positive vibrational frequencies. behaves as insulator, it...

We demonstrate photon-counting single-pixel imaging in the ultraviolet region. Toward this target, we develop a high-performance compact single-photon detector based on 4H-SiC avalanche diode (SPAD), where tailored readout circuit with active hold-off time is designed to restrain noise and operate SPAD free-running mode. use structured illumination reconstruct 192 × compressed images at 4 fps f...

Currently, various handling processes are used for sewage sludge treatment in order to reduce the sediment volume and amount, aerobic stabilization of sediment. Nevertheless, sites continue pose a threat population sanitary-epidemiological well-being as an unpleasant odors source. Objective: determination composition specific pollutants emissions generated at Zelenogorsk’s carry out further wor...

Purpose: To develop, validate and compare two chromatographic methods - high performance liquid chromatography with diode array detector ((HPLC-DAD) ultraviolet detection (UPLC-UV) for the effective analysis of polyphenols in Moringa oleifera leaves.Methods: HPLC-DAD UPLC-UV were applied accurate determination eleven major leaves. The conditions was determined on C18 column by gradient elution ...