Results 41 to 50 of about 2,621,243 (402)

Methods of Isolation of Active Substances from Garlic (Allium sativum L.) and Its Impact on the Composition and Biological Properties of Garlic Extracts

open access: yesAntioxidants, 2022
Garlic (Allium sativum L.) is widely used in the human diet and in scientific research due to its biological properties. Various factors, e.g., temperature, pressure, extraction method, type of solvent, size, and territorial origin of garlic, affect the ...
Monika Bar   +2 more
doaj   +1 more source

Solvation Free Energies in Subsystem Density Functional Theory [PDF]

open access: yes, 2021
For many chemical processes the accurate description of solvent effects are vitally important. Here, we describe a hybrid ansatz for the explicit quantum mechanical description of solute-solvent and solvent-solvent interactions based on subsystem density functional theory and continuum solvation schemes.
arxiv   +1 more source

Optimization of a new extraction technique for analysis of verbenone and cis-verbenol in pine seeds [PDF]

open access: yes, 2007
Results from a systematic study of the factors affecting extraction of cis-verbenol and verbenone from pine seeds are presented. Five extraction conditions were investigated: extraction solvent, method of extraction, extraction temperature, volume of ...
Fernández Barbero, Gerardo   +3 more
core   +2 more sources

Impact of limited solvent capacity on metabolic rate, enzyme activities, and metabolite concentrations of S. cerevisiae glycolysis [PDF]

open access: yes, 2008
The cell's cytoplasm is crowded by its various molecular components, resulting in a limited solvent capacity for the allocation of new proteins, thus constraining various cellular processes such as metabolism.
Barabási, AL   +3 more
core   +1 more source

Solvent Effects on the Menshutkin Reaction [PDF]

open access: yesarXiv, 2021
The Menshutkin reaction is a methyl transfer reaction relevant in fields ranging from biochemistry to chemical synthesis. In the present work, energetics and solvent distributions for NH$_{3}$+MeCl and Pyr+MeBr reactions were investigated in the gas-phase, in water, methanol, acetonitrile, benzene, and in cyclohexane by means of reactive molecular ...
arxiv  

Interfacial Phenomena of Solvent-diluted Block Copolymers [PDF]

open access: yesMacromolecules 47, 460 (2014), 2013
A phenomenological mean-field theory is used to investigate the properties of solvent-diluted di-block copolymers (BCP), in which the two BCP components (A and B) form a variety of phases that are diluted by a solvent (S). Using this approach, we model mixtures of di-block copolymers and a solvent and obtained the corresponding critical behavior.
arxiv   +1 more source

Enhanced Lycopene Extraction from Tomato Peels by Optimized Mixed-Polarity Solvent Mixtures

open access: yesMolecules, 2020
Mounting evidence from clinical and epidemiological studies suggests that lycopene, the most abundant carotenoid in tomatoes, may be beneficial in the prevention or treatment of some important diseases.
Antonio Zuorro
doaj   +1 more source

Modeling the absorption spectrum of the permanganate ion in vacuum and in aqueous solution [PDF]

open access: yes, 2017
The absorption spectrum of the MnO$_{4}$$^{-}$ ion has been a test-bed for quantum-chemical methods over the last decades. Its correct description requires highly-correlated multiconfigurational methods, which are incompatible with the inclusion of ...
Hedegård, Erik Donovan   +1 more
core   +2 more sources

Implicit Solvation Using the Superposition Approximation (IS-SPA): Extension to Polar Solutes in Chloroform [PDF]

open access: yes, 2020
Efficient, accurate, and adaptable implicit solvent models remain a significant challenge in the field of molecular simulation. A recent implicit solvent model, IS-SPA, based on approximating the mean solvent force using the superposition approximation, provides a platform to achieve these goals.
arxiv   +1 more source

Evaluation of silymarin extraction from Silybum marianum (L.) Gaertn seeds by water [PDF]

open access: yesفیزیولوژی محیطی گیاهی, 2008
The seeds extract of Silybum marianum (L.) Gaertn is named silymarin and used in treatment of liver diseases, diabetes (II) and hypercholesterolemia.
ف Hasanloo, r Sepehrifar
doaj  

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