Results 11 to 20 of about 343,710 (341)

Phase Transitions in Hexane Monolayers Physisorbed onto Graphite [PDF]

open access: yes, 2004
We report the results of molecular dynamics (MD) simulations of a complete monolayer of hexane physisorbed onto the basal plane of graphite. At low temperatures the system forms a herringbone solid.
C. L. Pint   +7 more
core   +2 more sources

Bleaching of chlorophylls by UV irradiation in vitro: the effects on chlorophyll organization in acetone and n-hexane [PDF]

open access: yesJournal of the Serbian Chemical Society, 2008
The stability of chlorophylls toward UV irradiation was studied by Vis spectrophotometry in extracts containing mixtures of photosynthetic pigments in acetone and n-hexane.
JELENA ZVEZDANOVIC, DEJAN MARKOVIC
doaj   +3 more sources

Accurate low-dose exposure assessment of benzene and monoaromatic compounds by diffusive sampling: sampling and analytical method validation according to ISO 23320 for radiello® samplers packed with activated charcoal

open access: yesFrontiers in Public Health, 2023
The research study aimed at providing an accurate low-dose benzene exposure assessment method, by validating diffusive monitoring techniques for benzene personal exposure measurements at workplaces where benzene concentrations are expected in the low ppb
Laura Zaratin   +5 more
doaj   +1 more source

Synthesis of 2-Acylphenol and Flavene Derivatives from the Ruthenium-Catalyzed Oxidative C-H Acylation of Phenols with Aldehydes [PDF]

open access: yes, 2015
The cationic ruthenium hydride complex [(C6H6)(PCy3)(CO)RuH]+BF4− has been found to be an effective catalyst for the oxidative C–H coupling reaction of phenols with aldehydes to give 2-acylphenol compounds.
Aponick   +47 more
core   +2 more sources

Comparison between ethanol and hexane for oil extraction from Quercus suber L. fruits

open access: yesGrasas y Aceites, 2003
The aim of this study was to (i) evaluate the feasibility of replacing n-hexane with ethanol for the extraction of oil from Quercus suber fruits and (ii) optimize, at lab scale, sample preparation and extraction time for both solvents used (n-hexane vs ...
Suzana Ferreira-Dias   +2 more
doaj   +1 more source

2-Methyloxolane as a Bio-Based Solvent for Green Extraction of Aromas from Hops (Humulus lupulus L.)

open access: yesMolecules, 2020
The potential of using the bio-based solvent 2-methyloxolane, also known as 2-methyltetrahydrofuran or 2-MeTHF, as an alternative to petroleum solvents such as hexane, was investigated for the extraction of volatile compounds from hop cones (Humulus ...
Vincent Rapinel   +7 more
doaj   +1 more source

Determination of Petroleum Oil in Soil by Fluorescence Spectrophotometry with Oscillatory Extraction

open access: yesYankuang ceshi, 2023
BACKGROUNDAs an important index of soil environmental quality, the determination of petroleum oil has become one of the must-test items in environmental monitoring.
Yuan LI, Xiaoyan DUAN, Yuge SHI, Gang LI
doaj   +1 more source

Aerosol OT Quantity Impacts on Calcium Nitrate Self-Healing Microcapsule Properties Used for Sustainable Construction Applications

open access: yesBuildings, 2022
This paper is a continuation of a previously published paper on this issue that studied the microencapsulation of calcium nitrate in urea-formaldehyde shell using Aerosol OT (AOT) in hexane solution.
Ala Abu Taqa   +6 more
doaj   +1 more source

Влияние концентрации н-гексана на изменение плотности и теплопроводности подсолнечного масла

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2017
It should be noted that in recent years, solutions with liquid components have a very wide distribution in the art and are used in many industrial processes, heat exchanging devices.

doaj   +1 more source

Model arenes hydrogenation with silica-supported rhodium nanoparticles:The role of the silica grains and of the solvent on catalytic activities [PDF]

open access: yes, 2009
Silica-supported rhodium-based nanoheterogeneous catalysts were easily prepared by impregnation with a pre-stabilized colloidal suspension. The resulting catalysts contain rhodium nanoparticles well-dispersed in the silica pores with a mean size of 5 nm.
Barthe, Laurie   +5 more
core   +3 more sources

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