Results 31 to 40 of about 1,059,060 (337)

Improving the Vanillin-Sulphuric Acid Method for Quantifying Total Saponins

Technologies, 2018
The colorimetric assay used for saponin quantification in plant extracts is subject to interference by common solvents used to extract the saponins from plant materials. Therefore, the degree of interference of ten common solvents was investigated.
Anh V. Le, Sophie E. Parks, Minh H. Nguyen, Paul D. Roach   +3 more
doaj   +1 more source

Solvent solutions: Comparing extraction methods for edible oils and proteins in a changing regulatory landscape. Part 4: Impacts on energy consumption☆

Oilseeds and fats, crops and lipids
This study compares various solvents for edible oil extraction, focusing on their energy consumption impacts. The research examines traditional hexane and alternative solvents, using both theoretical calculations and experimental data.
Carré Patrick, Piofczyk Thomas, Bothe Sarah, dev Borah Chandra, Hadjiali Sara   +4 more
doaj   +1 more source

Extraction solvents’ influence on the content of bioactive compounds and antioxidant activity of pansies

Millenium, 2019
Introduction: Pansies (Viola×wittrockiana) are a rich source of natural antioxidants with beneficial effects on human health. Objetives: The aim of our study was to investigate solvents’ influence (water, methanol, water:acetone (6:4, v/v)) on the ...
Luana Fernandes, José Alberto Pereira, Jorge Saraiva, Susana Casal, Elsa Ramalhosa   +4 more
doaj   +1 more source

Some properties of membranes in nematic solvents

, 1995
The fluctuation spectrum of membranes in nematic solvents is altered by the boundary condition imposed on the bulk nematic director by the curved membrane.
Olmsted, Peter D., Terentjev, Eugene M.
core   +2 more sources

Conformational Preferences of 3-(Dimethylazinoyl)propanoic Acid as a Function of pH and Solvent; Intermolecular versus Intramolecular Hydrogen Bonding [PDF]

, 2009
The conformational equilibrium of 3-(dimethylazinoyl)propanoic acid (DMAPA, azinoyl = N^+(O^−) has a weak pH-dependence in D_2O, with a slight preference for trans in alkaline solutions.
Alley, Olivia J., Drake, Michael D., Gerken, James B., Liu, Yang, Nkansah, Richard A., Roberts, John D.   +5 more
core   +2 more sources

Solvent solutions: comparing extraction methods for edible oils and proteins in a changing regulatory landscape. Part 1: Physical-properties☆

Oilseeds and fats, crops and lipids
In the context of potential regulatory changes, this study compares the properties of various solvents for the extraction of edible oils. The solvents considered are hexane isomers, alcohols, ketones, ethyl acetate, dichloromethane and 2-methyloxolane ...
Carré Patrick, Berthold Sebastian, Piofczyk Thomas, Bothe Sarah, Hadjiali Sara   +4 more
doaj   +1 more source

Equilibrium solvation in quadrupolar solvents

, 2005
We present a microscopic theory of equilibrium solvation in solvents with zero dipole moment and non-zero quadrupole moment (quadrupolar solvents). The theory is formulated in terms of autocorrelation functions of the quadrupolar polarization (structure ...
Abramowitz M., Allen M. P., Anatoli A. Milischuk, Bagchi B., Bagchi B., Barbara P. F., Böttcher C. J. F., Dmitry V. Matyushov, Gray C. G., Madden P., Press W. H., Raineri F. O., Stell G.   +12 more
core   +1 more source

Highly selective hydrogenation of furfural over supported Pt nanoparticles under mild conditions [PDF]

, 2015
The selective liquid phase hydrogenation of furfural to furfuryl alcohol over Pt nanoparticles supported on SiO₂, ZnO, γ-Al2O₃, CeO₂ is reported under extremely mild conditions.
Durndell, Lee J., Isaacs, Mark A., Kyriakou, Georgios, Lee, Adam F., Parlett, Christopher M.A., Taylor, Martin J., Wilson, Karen   +6 more
core   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

Population Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source