The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform

Alexander Apelblat - One of the best experts on this subject based on the ideXlab platform.

Emanuel Manzurola - One of the best experts on this subject based on the ideXlab platform.

Luis Henrique Mendes Da Silva - One of the best experts on this subject based on the ideXlab platform.

  • Measurement and Modeling of Phase Equilibrium in Aqueous Two-Phase Systems: L35 + Sodium Citrate + Water, L35 Sodium Tartrate + Water, and L35 + Sodium Hydrogen Sulfite + Water at Different Temperatures
    Journal of Chemical & Engineering Data, 2012
    Co-Authors: Luciano Sindra Virtuoso, Karla A. S. F. Vello, Aline A. De Oliveira, Cristina Mazzeu Junqueira, Anderson F. Mesquita, Nelson H. T. Lemes, Raquel Moreira Maduro De Carvalho, Maria Do Carmo Hespanhol Da Silva, Luis Henrique Mendes Da Silva
    Abstract:

    Phase diagrams have been determined for aqueous two-phase systems containing (EO)11(PO)16(EO)11, notation L35 (50% EO), and Sodium Citrate, Sodium tartrate, or Sodium hydrogen sulfite at different temperatures. The influences of the temperature and anion on the behavior of these systems were also analyzed. The temperature effect on the position of the binodal curves for systems containing Sodium Citrate and tartrate was not relevant, indicating a small enthalpy contribution associated with the phase separation. However, an enthalpic contribution for the phase splitting of the systems formed by Sodium hydrogen sulfite was observed. The ability of these three salts to induce the formation of a biphasic system with L35 followed the order Sodium Citrate > Sodium tartrate > Sodium hydrogen sulfite. In this work, the nonrandom two-liquid (NRTL) model was used to obtain new interaction energy parameters. The results were analyzed using root-mean-square deviations between experimental and calculated data in equil...

  • Liquid−Liquid Equilibria of an Aqueous Two-Phase System Formed by a Triblock Copolymer and Sodium Salts at Different Temperatures
    Journal of Chemical & Engineering Data, 2009
    Co-Authors: João Paulo Martins, Maria Do Carmo Hespanhol Da Silva, Luis Henrique Mendes Da Silva, Aparecida Barbosa Mageste, Pamela R. Patrício, Jane Sélia Dos Reis Coimbra, Luis Antonio Minim
    Abstract:

    Phase diagrams of aqueous two-phase systems composed of a triblock copolymer (L35) 1900 g·mol−1, Sodium tartarate, Sodium Citrate, or Sodium nitrate were determined at (283.15, 298.15, and 313.15) K. The temperature effect on the position of the binodal curves was not relevant, indicating a small enthalpic contribution associating to the phase segregation. The ability of three salts to induce the formation of the biphasic system with L35 followed the order Sodium Citrate > Sodium tartarate > Sodium nitrate. The preference of a salt-inducing phase segregation follows the Hofmeister series.

Jinlai Miao - One of the best experts on this subject based on the ideXlab platform.

  • Optimization of cold-active protease production by the psychrophilic bacterium Colwellia sp. NJ341 with response surface methodology.
    Bioresource technology, 2007
    Co-Authors: Quanfu Wang, Yanhua Hou, Jinlai Miao
    Abstract:

    Abstract Culture conditions were optimized for an extracellular cold-active protease production by the psychrophilic bacterium Colwellia sp. NJ341. Response surface methodology was applied for the most significant fermentation parameters (casein, Citrate Sodium, temperature and Tween-80) identified earlier by one-factor-at-a-time approach. A 2 4 full factorial central composite design was employed to determine the maximum protease production. Using this methodology, the quadratic regression model of producing cold-active protease was built and the optimal combinations of media constituents for maximum protease production (183.21 U/mL) were determined as casein 5.18 g/L, Citrate Sodium 3.84 g/L, temperature 7.96 °C, Tween-80 0.23 g/L. Protease production obtained experimentally coincident with the predicted value and the model was proven to be adequate.

  • Optimization of cold-active protease production by the psychrophilic bacterium Colwellia sp. NJ341 with response surface methodology.
    Bioresource technology, 2007
    Co-Authors: Quanfu Wang, Yanhua Hou, Jinlai Miao
    Abstract:

    Culture conditions were optimized for an extracellular cold-active protease production by the psychrophilic bacterium Colwellia sp. NJ341. Response surface methodology was applied for the most significant fermentation parameters (casein, Citrate Sodium, temperature and Tween-80) identified earlier by one-factor-at-a-time approach. A 2(4) full factorial central composite design was employed to determine the maximum protease production. Using this methodology, the quadratic regression model of producing cold-active protease was built and the optimal combinations of media constituents for maximum protease production (183.21 U/mL) were determined as casein 5.18 g/L, Citrate Sodium 3.84 g/L, temperature 7.96 degrees C, Tween-80 0.23 g/L. Protease production obtained experimentally coincident with the predicted value and the model was proven to be adequate.

Amir Hossein Faraji - One of the best experts on this subject based on the ideXlab platform.

  • the study of electroless ni p alloys with different complexing agents on ck45 steel substrate
    Arabian Journal of Chemistry, 2017
    Co-Authors: Amir Ahmadi Ashtiani, Soheila Faraji, Sepideh Amjad Iranagh, Amir Hossein Faraji
    Abstract:

    Abstract Ck45 Steel was electroless coated with nickel–phosphorus alloy from a bath containing Sodium hypophosphite and different complexing agents (Sodium Citrate, Sodium acetate and lactic acid). The effect of different complexing agents on phosphorus content, morphology, structure and hardness of the deposits was studied. The coating compositions deposited were determined by using energy dispersive X-ray spectroscopy (EDX). Scanning electron microscopy (SEM) was used to study the morphology of coatings. The anti-corrosion properties of Ni–P coatings were investigated in 3.5% NaCl solution by the weight loss and potentiodynamic polarization techniques. It has been found that Ni–P coating obtained using Sodium Citrate complexing agent with the spherical nodular structure and smooth surface showed higher microhardness and anti-corrosion resistance.