scholarly journals Research into Influence from Different Ranges of PAR Radiation on Efficiency and Biochemical Composition of Green Salad Foliage Biomass

2018 ◽  
pp. 38-47
Author(s):  
Leonid B. Prikupets ◽  
George V. Boos ◽  
Vladislav G. Terekhov ◽  
Ivan G. Tarakanov
Keyword(s):  
Biochemical Composition ◽  
Optical Radiation ◽  
Spectral Radiation ◽  
Irradiance Level ◽  
Capacity Curves ◽  
Radiation Action ◽  
Wide Range

Results of the first photobiological studies of optimisation of LED phyto irradiators spectrum and irradiance level, when growing salad­greengrocers plants in greenhouses and plant factories in photoculture conditions, are presented in the article. The results are given as a series of producing capacity curves for salad and basil plants when irradiating by quasi­monochromatic spectrum for three PAR ranges: blue, green and red. In the experiment, levels of photosynthetic photon irradiance (70 ? 230) µmol/s·m2 and of irradiance (13 ? 60) W/m2 were varied within a wide range. “Rough” spectra of optical radiation action estimated over producing capacity of plants with different irradiance levels are given, and questions of additivity of different spectral radiation influence in forming vegetable biomass are considered. Evaluations of efficiency of various PAR intervals for synthesis of biochemical combinations determining nutrition facts of the studied cultures are performed.

Gas Liquid Vane Separators in High Pressure Applications

2010 ◽  
Author(s):  
Dani Fadda ◽  
David Barker
Keyword(s):  
Separation Efficiency ◽  
Pressure Vessels ◽  
Cfd Modeling ◽  
Test Results ◽  
Capacity Curves ◽  
Liquid Handling ◽  
Wide Range ◽  
Computational Fluid Dynamics Cfd ◽  
Very High ◽  
High Separation

Vane separators are inertial devices used to remove entrained liquids from gas. They are utilized in pressure vessels operating at a wide range of temperatures and pressures. Computational Fluid Dynamics (CFD) modeling and sizing calculations are used to evaluate the loading to a vane separator and determine the maximum overall gas and liquid handling capacity of the pressure vessel. Test results, performed at operating pressures up to 133 bar (1931 psia) using live natural gas illustrate that, when sized correctly based on the vane’s capacity curves and CFD modeling, vane separators continue to have high separation efficiency at very high operating pressures.

Wide-range calibration of optical radiation power meters

2019 ◽  
Vol 86 (12) ◽  
pp. 758
Author(s):  
E. V. Kuvaldin ◽  
A. A. Shulga
Keyword(s):  
Optical Radiation ◽  
Radiation Power ◽  
Wide Range

scholarly journals Optical-electronic monitoring system of biomedical indicators

2020 ◽  
Vol 21 (4) ◽  
pp. 779-784
Author(s):  
G.I. Barylo ◽  
M.S. Ivakh ◽  
Z.M. Mykytiuk ◽  
I.P. Kremer
Keyword(s):  
Optical Radiation ◽  
Electronic Monitoring ◽  
The Internet ◽  
Medical Systems ◽  
Biological Objects ◽  
Wide Range ◽  
Signal Path ◽  
Measurement Transformation ◽  
The Internet Of Things ◽  
Methods Of Measurement

The work is devoted to the development of medical systems for monitoring biomedical indicators. The problem of developing a universal hardware software-controlled control system for the diagnosis of biological objects is solved. The main requirements for such a system are a wide range of functionality for combining different methods of measurement transformation and compliance with modern trends in the development of microelectronic sensors. Given the requirements for modern microcircuitry, in particular for sensing devices of the Internet of Things, the signal path of the sensors is implemented on the basis of PSoC family 5LP Family Cypress. Approbation of the developed system is carried out in the course of research of the character of optical radiation in the course of measurement of biomedical indicators.

scholarly journals AMPLITUDE CHARACTERISTICS OF SILICON PHOTO-ELECTRON MULTIPLIER’S PHOTORESPORENSE

2019 ◽  
Author(s):  
Maryna Asayonak ◽  
Andrey Zenevich ◽  
Yauhen Novikau
Keyword(s):  
Optical Radiation ◽  
Supply Voltage ◽  
Block Diagram ◽  
Wave Length ◽  
Photon Counting ◽  
Current Mode ◽  
Average Amplitude ◽  
Avalanche Photodetectors ◽  
Operating Modes ◽  
Wide Range

Currently, in many applications, photodetectors are needed that provide registration of optical radiation in a wide range of intensities and allow combining two operating modes: current mode and photon counting. These devices include silicon photoelectronic multipliers (SiPM), which have a number of advantages compared to electrovacuum photomultipliers and avalanche photodetectors. However, the influence on the photoresponse characteristics of SiPM of such important factors as the supply voltage and temperature has not been studied enough. The influence of these factors on the amplitude parameters of the photoresponse of SiPM is studied. The block diagram of the experimental setup is presented, with the help of which the photoresponse characteristics of SiPM with n+-n-p+ and p+-p-n+ structures manufactured by Integral OJSC (Republic of Belarus) were measured. The dependences of the average amplitude of the photoresponse on the supply voltage and temperature of silicon photomultipliers for various wave-lengths of optical radiation are presented. It was found that when SiPM were exposed to optical pulses with the same duration and energy exposure at the same temperature at the same overvoltage, the photoresponse amplitude was larger for a SiPMr with p+-p-n+ structure regardless of the wave-length of optical radiation. It was found that, when the overvoltage changes, the increase in the photoresponse amplitude is observed only in the overvoltage range ΔU = 0 ¸ 3 V for all the studied SiPM, irrespective of the wave-length of the detected optical radiation and temperature. It was determined that a decrease in temperature led to an increase in the amplitude of the photoresponse pulses. The temperature dependence of the amplitude of the photoresponse was most pronounced for SiPM with the p+-p-n+ structure. It was shown that the dependences of the average amplitude of the photomonitor Si-PM on the energy exposure have a linear section, the length of which depends on the wavelength of the detected optical radiation.

scholarly journals In Vitro Antimicrobial Activity Screening of Ethanol Extract of Lavandula stoechas and Investigation of Its Biochemical Composition

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Kerem Canlı ◽  
Ali Yetgin ◽  
Atakan Benek ◽  
Mustafa Eray Bozyel ◽  
Ergin Murat Altuner
Keyword(s):  
Antimicrobial Activity ◽  
Biochemical Composition ◽  
Ethanol Extract ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Multidrug Resistant Bacteria ◽  
Lavandula Stoechas ◽  
Wide Range ◽  
Activity Screening

The aim of this study was to test antimicrobial activity of ethanol extract of Lavandula stoechas against 22 bacteria and 1 yeast. Also, biochemical composition of the extract was investigated. A wide range of Gram-positive, Gram-negative microorganisms, and multidrug resistant bacteria were selected to test the antimicrobial activity. As a result, the extract is observed to contain fenchone (bicyclo[2.2.1]heptan-2-one, 1,3,3-trimethyl-, (1R)-) and camphor (+)-2-bornanone) as major components and showed antimicrobial activity against all studied microorganisms except Escherichia coli ATCC 25922 and Klebsiella pneumoniae. The results of the study present that L. stoechas is active against MDR strains too.

Measurement of the energy of pulses of optical radiation over a wide range of durations and repetition frequencies

1981 ◽  
Vol 24 (3) ◽  
pp. 195-198
Author(s):  
V. T. Kibovskii ◽  
F. Kh. Klychev ◽  
V. I. Kukhtevich ◽  
Sh. A. Rubin
Keyword(s):  
Optical Radiation ◽  
Wide Range

scholarly journals BIOCHEMICAL PROFILE OF GREEN AND RED ALGAE – A KEY FOR UNDERSTANDING THEIR POTENTIAL APPLICATION AS FOOD ADDITIVES

2019 ◽  
Vol 17 (1) ◽  
pp. 1-7
Author(s):  
Iv. Vasileva ◽  
J. Ivanova
Keyword(s):  
Red Algae ◽  
Biochemical Composition ◽  
Algal Biomass ◽  
Food Additives ◽  
Porphyridium Cruentum ◽  
Health Food ◽  
Functional Ingredients ◽  
Microalgal Cultivation ◽  
Potential Source ◽  
Wide Range

PURPOSE: With the improvements of the microalgal cultivation industry, it became possible to add algal biomass and its metabolites in foods in order to create a balanced and health-food. METHODS: By determining the growth and the biochemical composition (lipids, carbohydrates and proteins), two algal strains were evaluated as a potential source of food additives – the newly isolated strain of the green algae Scenedesmus sp. and the red algae Porphyridium cruentum). RESULTS: It turned out that in Scenedesmus sp. BGP the most abundant component were the proteins (up tp 45 %), which makes this alga an excellent unconventional protein producer. As opposed to it, the biochemical composition of Porphyridium cruentum was dominated by carbohydrates (up to 57%), but there was also a high content of some essential polyunsaturated fatty acids: arachidonic (AA, 20:4; 13-29%) and eicosapentaenoic acid (EPA, 20:5, 24-25%). CONCLUSIONS: Microalgae are a really remarkable source of biomass and a wide range of substances, but this area is poorly explored. Both of the microalgal strains proved to be important sources of functional ingredients that could be successfully used as food additives together or separately.

Recent Applications of High Resolution Electron Microscopy to Crystalline Arrays of Virus Particles

1978 ◽  
Vol 36 (3) ◽  
pp. 470-482 ◽  
Author(s):  
R.W. Horne
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Analytical Techniques ◽  
Staining Technique ◽  
High Resolution Electron Microscopy ◽  
Optical Diffraction ◽  
Full Potential ◽  
Virus Particles ◽  
Resolution Electron ◽  
Wide Range

The technique of surrounding virus particles with a neutralised electron dense stain was described at the Fourth International Congress on Electron Microscopy, Berlin 1958 (see Home & Brenner, 1960, p. 625). For many years the negative staining technique in one form or another, has been applied to a wide range of biological materials. However, the full potential of the method has only recently been explored following the development and applications of optical diffraction and computer image analytical techniques to electron micrographs (cf. De Hosier & Klug, 1968; Markham 1968; Crowther et al., 1970; Home & Markham, 1973; Klug & Berger, 1974; Crowther & Klug, 1975). These image processing procedures have allowed a more precise and quantitative approach to be made concerning the interpretation, measurement and reconstruction of repeating features in certain biological systems.

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