Browsing by Subject "Triton X-100"

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    Selected kinetic properties of polyphenol oxidase extracted from rosmarinus officinalis l
    (2010) Aydemir T.
    Polyphenol oxidase from Rosmarinus officinalis L. (PPO, EC 1:14:18.1) was extracted and partially purified by using (NH4)2SO 4 precipitation and dialysis. Stable and highly active PPO extracts were obtained using 0.5% (w/v) PEG and 0.5% (w/v) Triton X-100 in 0.1 M phosphate buffer 7.0. KM values were found to be as 14.3 mM for catechol. Four isoenzymes of Rosemary PPO were detected by PAGE with DL-dopa substrate. The enzyme was strongly inhibited by dithiotreitol, sodium metasulfite, sodium thiosulfate, ascorbic acid, and L-cysteine. Metal ions Ca++, Mg++, and Mn++ were poor inhibitors of rosemary PPO at 10 Mm. Copyright © Taylor & Francis Group, LLC.
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    An effective strategy for decreased energy consumption by using Fe3O4 + CeO2 @ POE in Cooling system
    (SAGE Publications Ltd, 2022) Akkaya M.
    With a view to decreasing the energy consumption in cooling systems, many different methods have been used at the present time. One of these methods is the addition of solid nanoparticles to the compressor lubricant in order to increase the heat transfer surface. In this context, single and hybrid nanolubricants have been prepared by adding nano-sized iron (II, III) oxide (Fe3O4) and cerium oxide (CeO2) hybrid nanoparticles into polyol ester (POE) at different mass ratios by weight. 0.3% and 0.6% by weight of single Fe3O4 and hybrid Fe3O4 + CeO2 nanoparticles were added to this colloidal suspension separately. In addition, a 0.3% volume fraction of the surfactant triton X-100 (TX-100) was added to each suspension to avoid folliculations in nanolubricants. An experimental study was conducted under two different mass fraction single and hybrid nanolubricant to compressor section of the cooling system, respectively. The maximum improvement in coefficient of performance (COP) and the decrease in compressor work were found to be as 11.84% and 16.73%, respectively, when the hybrid nanolubricant was used as compressor lubricant. © IMechE 2022.