Results 11 to 20 of about 101,675 (310)

Gravitational Field-Flow Fractionation Devices Fabricated via a Hot Embossing/Thermal Bonding Method

open access: yesMicromachines, 2014
A novel hot embossing/low temperature ethanol solvent bonding method for the fabrication of polymethylmethacrylate (PMMA) field flow fractionation devices has been developed.
Kaijun Yang
doaj   +1 more source

Modelling and experimental study of separators for co-solvent recovery in a supercritical extraction process [PDF]

open access: yes, 2006
Co-solvent recovery in supercritical extraction is addressed here through a theoretical description of the behaviour of a CO2 + co-solvent mixture into a cascade of cyclonic separators, such as those existing in conventional fractionation processes based
Camy, Séverine   +1 more
core   +2 more sources

Isotopic fractionation in proteins as a measure of hydrogen bond length [PDF]

open access: yes, 2015
If a deuterated molecule containing strong intramolecular hydrogen bonds is placed in a hydrogenated solvent it may preferentially exchange deuterium for hydrogen.
Athokpam, Bijyalaxmi   +2 more
core   +2 more sources

Kinetic study of pilot-scale supercritical CO2 extraction of rosemary (Rosmarinus officinalis) leaves [PDF]

open access: yes, 2011
NOTICE: This is the author’s version of a work that was accepted for publication in Journal of Supercritical Fluids. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality ...
Fornari, Tiziana   +5 more
core   +2 more sources

Stigmasterol and Stigmasterone from Methanol Extract of Calophyllum soulattri Burm. F. Stem Bark

open access: yesJurnal Kimia Sains dan Aplikasi, 2021
Stigmasterol and Stigmasterone from Methanol Extract of Calophyllum soulattri Burm. F. Stem Bark. Calophyllum soulattri Burm. F. has been widely used for herbal medicine. Phytochemical investigation of C.
Surya Dewi Marliyana   +6 more
doaj   +1 more source

Solvent Extractive Fractionation of Ziegler Polystyrene [PDF]

open access: yesBulletin of the Chemical Society of Japan, 1962
Abstract The solvent extractive fractional ability has been described, using Ziegler polystyrene as sample. The order in hot extraction is tetra-hydrofuran >dioxane >ethyl methyl ketone ≥ ethyl acetate, while that in cold extraction is benzene >> ethyl methyl ketone≥ethyl acetate=toluene.
Akira Yamada   +2 more
openaire   +1 more source

Polychlorinated biphenyls in air and water of the North Atlantic and Arctic Ocean. [PDF]

open access: yes, 2008
Air and seawater samples were collected on board the R/V Polarstern during a scientific expedition from Germany to the Arctic Ocean during June–August 2004.
Dachs, Jordi   +7 more
core   +3 more sources

Ultra-Micro-Scale-Fractionation (UMSF) as a Powerful Tool for Bioactive Molecules Discovery

open access: yesMolecules, 2020
Herein is detailed the development and validation of an ultra-micro-scale-fractionation (UMSF) technique for the discovery of plant-based, bioactive molecules, coupling the advantages of ultra-performance liquid chromatography mass spectrometry (UPLC-MS)
Jason L. McCallum   +2 more
doaj   +1 more source

Theoretically predicting the solubility of polydisperse polymers using Flory–Huggins theory

open access: yesJPhys Materials, 2023
Polydispersity affects physical properties of polymeric materials, such as solubility in solvents. Most biobased, synthetic, recycled, mixed, copolymerized, and self-assembled polymers vary in size and chemical structure.
Stijn H M van Leuken   +3 more
doaj   +1 more source

An improved method for the high isotacticity measurement of polybutene-1

open access: yesPolymer Testing, 2021
High isotactic polybutene-1 (HiPB) plays important roles in presenting outstanding resistance to creep and crack at high temperature. Therefore, rapid and accurate measurement of the HiPB is extremely important for both synthesis and application of ...
Weiping Zheng   +4 more
doaj   +1 more source

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