On the Reactivity of Native Phytochrome

1984 ◽  
Vol 39 (7-8) ◽  
pp. 742-745 ◽  
Author(s):  
Peter Eilfeld ◽  
Wolfhart Rüdiger
Keyword(s):  
Ethylene Glycol ◽  
Experimental Results ◽  
Ans Binding ◽  
Phytochrome Models ◽  
Tentative Model

Abstract Previous phytochrome models were based on experimental results obtained only with proteolytically degraded phytochrome. The reactivity of native phytochrome, in both the Pr and the Pfr form, towards 8-anilinonaphthalene-1-sulfonate (ANS), urea, and ethylene glycol is described here. Whereas native phytochrome in the Pfr form is only very slowly bleached by ANS, immediate bleaching occurs with ANS treated Pr during red irradiation. The bleached form, Pr660, can be converted into Pr660 by prolonged far-red irradiation. A tentative model for native phytochrome is proposed which explains the effects of phototransformation, ANS binding and partial proteolysis.

scholarly journals The Investigation of Effects of Temperature and Nanoparticles Volume Fraction on the Viscosity of Copper Oxide-ethylene Glycol Nanofluids

2017 ◽  
Author(s):  
Mohammad Hemmat Esfe
Keyword(s):  
Ethylene Glycol ◽  
Copper Oxide ◽  
Volume Fraction ◽  
Relative Viscosity ◽  
Experimental Results ◽  
Different Temperatures ◽  
Nanoparticles Volume Fraction ◽  
Effects Of Temperature ◽  
Nanofluid Viscosity ◽  
Experimental Values

In the present article, the effects of temperature and nanoparticles volume fraction on the viscosity of copper oxide-ethylene glycol nanofluid have been investigated experimentally. The experiments have been conducted in volume fractions of 0 to 1.5 % and temperatures from 27.5 to 50 °C. The shear stress computed by experimental values of viscosity and shear rate for volume fraction of 1% and in different temperatures show that this nanofluid has Newtonian behaviour. The experimental results reveal that in a given volume fraction when temperature increases, viscosity decreases, but relative viscosity varies. Also, in a specific temperature, nanofluid viscosity and relative viscosity increase when volume fraction increases. The maximum amount of increase in relative viscosity is 82.46% that occurs in volume fraction of 1.5% and temperature of 50 °C. Some models of computing nanofluid viscosity have been suggested. The greatest difference between the results obtained from these models and experimental results was down of 4 percent that shows that there is a very good agreement between experimental results and the results obtained from these models.

Study on Reaction Process of Synthesis of Indole from Aniline and Ethylene Glycol

2011 ◽  
Vol 287-290 ◽  
pp. 120-123 ◽  
Author(s):  
Jun De Xing ◽  
Zhi Liu
Keyword(s):  
Ethylene Glycol ◽  
Experimental Results ◽  
Reaction Process

The reaction process of synthesis of indole from aniline and ethylene glycol was studied by GC-MS. Based on experimental results, a new reaction process proposed. It was found to be quite complicated with involvement of a few of main phases: condensation, cyclization, elimination and so on, which provides a theoretical guild for the development of used catalysts. It could be presupposed that the yield of synthesis of indole was related to dehydrogenation activity of catalysts.

Comparison of Ethylene-Glycol Coolants With/Without Additives for Subcooled Boiling Conditions

2012 ◽  
Author(s):  
Ryan Ehid ◽  
Edward V. McAssey ◽  
Lee Reichard ◽  
Jurgen De Kimpe ◽  
Serge Lievens
Keyword(s):  
Experimental Data ◽  
Heat Flux ◽  
Ethylene Glycol ◽  
Corrosion Protection ◽  
Thermal Performance ◽  
Experimental Results ◽  
Subcooled Boiling ◽  
Maximum Heat ◽  
Maximum Heat Flux ◽  
Aqueous Ethylene Glycol

This paper presents experimental data comparing the thermal performance of aqueous ethylene-glycol mixtures with and without additives. These additives are used to provide corrosion protection, but their presence can also improve the coolant thermal performance. The experimental results show that the coolant with additives yields wall temperatures approximately 50°C lower than the non-additive coolant at the maximum heat flux condition.

Optimization of Anhydrous Coolant’s Base Fluid and the Evaluation of Low Temperature Performance

2014 ◽  
Vol 696 ◽  
pp. 53-56 ◽  
Author(s):  
Jin Mao Chen ◽  
Bo Gao ◽  
Guan Jun Leng ◽  
Jing Heng Feng
Keyword(s):  
Low Temperature ◽  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Base Fluid ◽  
Evaluation Method ◽  
Freezing Point ◽  
Reference Value ◽  
Experimental Results ◽  
Temperature Performance ◽  
Low Temperature Performance

The low-temperature viscosity of anhydrous coolant is reduced by adding ethylene glycol to the propylene glycol base fluid, and the evaluation method of low-temperature fluidity is also studied. The experimental results show that the low-temperature fluidity of anhydrous coolant can be greatly improved by the participating of ethylene glycol. Freezing point method is usually used for measuring the low temperature performance of coolant, but for “long icing process” anhydrous coolant, beginning-crystal point shows more practical reference value. Therefore, freezing point, beginning-crystal point and low-temperature fluidity should be considered at the same time when evaluation the low temperature performance of anhydrous coolant.

scholarly journals The Effect of Temperature on Solvent Recycle Process using Stripping of CO2 from MDEA, Ethylene Glycol, and Water

2021 ◽  
Vol 927 (1) ◽  
pp. 012038
Author(s):  
Aswati Mindaryani ◽  
Edia Rahayuningsih ◽  
Nikodemus Bambang Wijayanto ◽  
Alwan Naufal Masulili
Keyword(s):  
Mass Transfer ◽  
Ethylene Glycol ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Flue Gas ◽  
Experimental Results ◽  
Effect Of Temperature ◽  
Gas Analyzer ◽  
Dissolved Gas

Abstract Stripping is a process to separate dissolved gas in the saturated solvent to regenerate the absorption solvent. In this study, N2 gas was used to strip dissolved CO2 gas in MDEA, ethylene glycol, and water. The experiment was conducted with three variations of temperature, namely 28°C, 35°C, and 50°C, to determine the effect of solvent’s temperature entering the stripper column on the value of the mass transfer coefficient (Kla). The stripper effluent was connected to the KANE 457 Flue Gas Analyzer to measure the concentration of CO2. Data retrievals were carried out at the 0; 30; 60; 90; 120; 150; 180th second. The experimental results show the trend of mass transfer coefficient of CO2 (Kla) is higher with the increase of solvent’s temperature entering the stripper.

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