نتایج جستجو برای: solvent type

تعداد نتایج: 1392225  

Journal: :Journal of food technology research 2023

The conventional solvent extraction (CSE) method is commonly used to extract oil from oilseeds. Even though the of soybean seeds using CSE has been studied extensively, application response surface methodology (RSM) not yet widely explored. In this paper, was employed three different types solvents – ethanol (Eth), n-hexane (Hex), and a mixture Hex:Eth in ratio 2:1 optimized RSM Cambodian seeds...

Journal: :Dalton transactions 2016
Giacomo Cioncoloni Hans M Senn Stephen Sproules Claire Wilson Mark D Symes

Complexes of Co(iii) containing mixed chelating diimine and o-quinone ligand sets are of fundamental interest on account of their fascinating magnetic and electronic properties. Whilst complexes of this type containing one diimine and two o-quinone ligands have been studied extensively, those with the reverse stoichiometry (two diimines and one o-quinone) are much rarer. Herein, we describe a r...

Journal: :Journal of magnetic resonance 2003
Michal Witanowski Zenobia Biedrzycka Wanda Sicinska Zbigniew Grabowski

High-precision nitrogen NMR shieldings, bulk susceptibility corrected, are reported for dimethyl-N-nitrosamine (I) and diethyl-N-nitrosamine (II) in a variety of solvents which represent a wide range of solvent properties from the point of view of polarity as well as hydrogen bond donor and acceptor strength. The observed range of solvent-induced nitrogen shielding variations of (I) and (II) is...

2012
Jens Kleinjung Walter R. P. Scott Jane R. Allison Wilfred F. van Gunsteren Franca Fraternali

Implicit solvation is a mean force approach to model solvent forces acting on a solute molecule. It is frequently used in molecular simulations to reduce the computational cost of solvent treatment. In the first instance, the free energy of solvation and the associated solvent-solute forces can be approximated by a function of the solvent-accessible surface area (SASA) of the solute and differe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده علوم پایه 1392

‎in this article‎, ‎we have focused one some basic and productive information about the properties of spectrum and singular values related to compact operators which are ideals in a c*-algebra of bounded operators‎. ‎considering a two-sided connection between the family of symmetric gauge functions on sequence of singular values of compact operators and symmetric norms on finite dimensional ope...

Journal: :Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering 2007
C Stewart Slater Mariano Savelski

This paper describes the development of a method to calculate the overall "greenness" of a pharmaceutical process that uses multiple solvents. This calculation is made by taking into account various environmental parameters and determining an overall greenness index. Through this method a scientist or engineer can effectively determine alternative, "greener" solvents or processes based on the u...

Journal: :Colloids and Surfaces A: Physicochemical and Engineering Aspects 2021

Abstract An integrally skinned organic solvent-resistant membrane with asymmetric structure for solvent nanofiltration (OSN) application was developed via thermally induced phase separation (TIPS) of nanocomposite polyamide 6. The 6 contains intercalated silicate sheets, which could improve the mechanical properties resultant membrane, as well mitigate swelling after exposure in solvent. influe...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 1995
mozaffar asadi gasi abdul wahab derwich

the equilibrium constant of adduct formation between some triorganotin chloride of the type r3sncl (r=c6h5, p-ch3c6h4, n-ch3)ch2)3, c6h5-ch2 and lewis bases cl¯, br¯, and i¯, were measured in 50% v/v ethanol-water solvent spectrophotometrically. the average equilibrium constant values for the systems studied shows the following acceptor trend of tin(iv) in the triorganotin chlorides: p-tolyl > ...

Journal: :iranian journal of oil & gas science and technology 2013
mohammad hosein eghbali ali reza soleimani nazar touraj tavakoli

the oil content of the wax produced in a dewaxing process is the key economic parameter thatshould be reduced as much as possible. some factors such as the type of solvents, cooling rate,temperature, and solvent to oil ratio influence the dewaxing process. due to the fact that crude oildiffers from place to place and since the operational conditions for wax extraction vary for differenttypes of...

Journal: :The Journal of chemical physics 2004
Ignacio B Martini Benjamin J Schwartz

We study the photodetachment of electrons from sodium anions in room temperature liquid tetrahydrofuran (THF) using a new type of three-pulse pump-probe spectroscopy. Our experiments use two variably-time-delayed pulses for excitation in what is essentially a resonant 1+1 two-photon ionization: By varying the arrival time of the second excitation pulse, we can directly observe how solvent motio...

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