Results 61 to 70 of about 16,180 (196)

Molecular dynamics simulations for the prediction of the dielectric spectra of alcohols, glycols, and monoethanolamine [PDF]

open access: yes, 2015
The response of molecular systems to electromagnetic radiation in the microwave region (0.3–300 GHz) has been principally studied experimentally, using broadband dielectric spectroscopy.
Cardona, Javier   +3 more
core   +1 more source

Eco-friendly methods of reducing the consequences of winter maintenance in urban green areas

open access: yesFolia Horticulturae, 2009
Trees play a crucial role in the urban environment. They fulfil aesthetic, sociocultural, ecological, health-promoting and economic functions. Urban development and related human activity bring many risks to green areas within urban space.
Bach Anna   +2 more
doaj   +1 more source

Immediate hypersensitivity to polyethylene glycols in unrelated products: when standardization in the nomenclature of the components of drugs, cosmetics, and food becomes necessary

open access: yesAllergy, Asthma & Clinical Immunology, 2019
Background Polyethylene glycols (PEGs) and their derivatives are non-ionic polymers of ethylene oxide commercially available with numerous synonyms, such as macrogol, oxyethylene polymer, and laureth-9.
Vicente Jover Cerdá   +4 more
doaj   +1 more source

Determination of water-glycol coolant flammability [PDF]

open access: yes
Determination of water-glycol coolant flammability for Apollo ...
Jamison, H. H.
core   +1 more source

Effects of cryoprotectant concentration and cooling rate on vitrification of aqueous solutions

open access: yes, 2006
Vitrification of aqueous cryoprotectant mixtures is essential in cryopreservation of proteins and other biological samples. We report systematic measurements of critical cryoprotective agent (CPA) concentrations required for vitrification during plunge ...
Alsaied, Osama A.   +3 more
core   +1 more source

Palladium-bismuth intermetallic and surface-poisoned catalysts for the semi-hydrogenation of 2-methyl-3-butyn-2-ol [PDF]

open access: yes, 2015
The effects of poisoning of Pd catalysts with Bi and annealing in a polyol (ethylene glycol) were studied on the semi-hydrogenation of 2-methyl-3-butyn-2-ol (MBY).
Anderson, James A.   +4 more
core   +1 more source

Hydrophilicity as a measure of the efficiency of the superplasticisers

open access: yesBudownictwo i Architektura, 2013
This paper presents the results of chemical structural investigations of four new-generation superplasticizers (denoted here as SP-A through SP-M2) used in concrete production engineering. The commercial product samples, the gel permeation chromatography
Elżbieta Janowska-Renkas
doaj   +1 more source

Exploring mild enzymatic sustainable routes for the synthesis of bio-degradable aromatic-aliphatic oligoesters [PDF]

open access: yes, 2016
The application of Candida antarctica lipase B in enzyme-catalyzed synthesis of aromatic-aliphatic oligoesters is here reported. The aim of the present study is to systematically investigate the most favorable conditions for the enzyme catalyzed ...
Brandauer, Martin   +6 more
core   +1 more source

Polyester Polyols from Waste PET Bottles for Polyurethane Rigid Foams [PDF]

open access: yes, 2003
This paper describes a modified process to produce polyester polyols from PET wastes derived from the “bottle fraction residue” of the German Dual System (DSD) [11] employing a waste oligoester condensate of the polyesterification process with the ...
Behrendt, Gerhard   +5 more
core   +1 more source

Gelation and Cryogelation of Chitosan: Origin of Low Efficiency of Diglycidyl Ethers as Cross-Linkers in Acetic Acid Solutions

open access: yesPolysaccharides
Although diglycidyl ethers of glycols (DEs)—FDA-approved reagents for biomedical applications—were considered unsuitable for the fabrication of chitosan (CH) hydrogels and cryogels, we have recently shown that CH cross-linking with DEs is possible, but ...
Yuliya Privar   +4 more
doaj   +1 more source

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