Results 11 to 20 of about 485,845 (302)

Liquid Chromatography/Mass Spectrometry for the Analysis of Non-Polar Compounds [PDF]

open access: yes, 2003
Strategies to expand the applicability of LC/MS to the analysis of non-polar compounds are presented within this thesis: The most important techniques presented here are on-line electrochemical conversion of the analytes to more polar reaction products ...
Hayen, Heiko
core   +12 more sources

Contribution of Lipids to the Flavor of Mussel (Mytilus edulis) Maillard Reaction Products

open access: yesFoods, 2022
Lipid oxidation and the Maillard reaction are two of the most important reactions affecting the flavor of foods that have been heat-processed. To investigate the contribution of lipids to the mussel’s flavor, the mussel’s Maillard reaction products (MRPs)
Ran Xin   +6 more
doaj   +1 more source

Influence of fatty acid composition on the formation of polar glycerides and polar fatty acids in sunflower oils heated at frying temperatures.

open access: yesGrasas y Aceites, 1997
Conventional and high oleic sunflower oils as well as 50% mixture of both of them were heated at different temperatures under well-controlled conditions. Total polar compounds, the main groups of polar glycerides, total polar fatty acids, the main groups
N. Jorge   +2 more
doaj   +1 more source

A New Insight into the Evaluation of Used Frying Oils Based on the Kinetics of Chemical Changes during the Process

open access: yesFoods, 2023
Kinetics of change in total polar compounds (TPC), carbonyl value (CV), and conjugated diene value (CDV) were simultaneously investigated during the frying of potato strips in eight oil samples at 170 °C.
Seyed Mohammad Reza Moosavi   +1 more
doaj   +1 more source

The Compound Polarizer [PDF]

open access: yesNature, 1957
THE compound polarizer is a device for producing beams of polarized light of variable colours in the field of a microscope ocular. The polarizer proper consists of a disk of ‘Polaroid’, a disk of polythene and a disk of ‘Rayophane’, in that order from the light source ; each of these disks can be rotated around a common axis. The analyser consists of a
openaire   +2 more sources

Hydrophilic hypercrosslinked polymeric sorbents for the solid-phase extraction of polar contaminants from water [PDF]

open access: yes, 2010
Three new hypercrosslinked polymers with hydrophilic character arising from hydroxyl moieties in their skeletons have been prepared in microsphere format and applied to the off-line solid-phase extraction (SPE) of polar compounds from water samples.
Borrull, F.   +5 more
core   +1 more source

Compound polar codes

open access: yes2013 Information Theory and Applications Workshop (ITA), 2013
A capacity-achieving scheme based on polar codes is proposed for reliable communication over multi-channels which can be directly applied to bit-interleaved coded modulation schemes. We start by reviewing the ground-breaking work of polar codes and then discuss our proposed scheme.
Mahdavifar, Hessam   +3 more
openaire   +2 more sources

New Trends in Biopolymer-Based Membranes for Pervaporation

open access: yesMolecules, 2019
Biopolymers are currently the most convenient alternative for replacing chemically synthetized polymers in membrane preparation. To date, several biopolymers have been proposed for such purpose, including the ones derived from animal (e.g., polybutylene ...
Roberto Castro-Muñoz   +1 more
doaj   +1 more source

Polar phonons and spin-phonon coupling in HgCr2S4 and CdCr2S4 [PDF]

open access: yes, 2007
Polar phonons of HgCr2S4 and CdCr2S4 are studied by far-infrared spectroscopy as a function of temperature and external magnetic field. Eigenfrequencies, damping constants, effective plasma frequencies and Lyddane-Sachs-Teller relations, and effective ...
A. Loidl   +8 more
core   +2 more sources

Revealing Tendencies in the Electronic Structures of Polar Intermetallic Compounds

open access: yesCrystals, 2018
The quest for solid-state materials with tailored chemical and physical features stimulates the search for general prescriptions to recognize and forecast their electronic structures providing valuable information about the experimentally determined bulk
Fabian C. Gladisch, Simon Steinberg
doaj   +1 more source

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