Results 41 to 50 of about 7,538 (194)

Ring-opening copolymerization (ROCOP): synthesis and properties of polyesters and polycarbonates [PDF]

open access: yes, 2015
Controlled routes to prepare polyesters and polycarbonates are of interest due to the widespread application of these materials and the opportunities provided to prepare new copolymers. Furthermore, ring-opening copolymerization may enable new poly(ester–
Brooks, R   +5 more
core   +1 more source

GC-MS based metabolite profiling of five Bulgarian Fumaria species [PDF]

open access: yesJournal of BioScience and Biotechnology, 2014
The aim of this study was profiling of primary metabolites of five Bulgarian Fumaria species (F. officinalis L., F. thuretii Boiss., F. kralikii Jord., F. rostellata Knaf. and F. schrammii Velen.) by GC-MS analyses.
Radka Z. Vrancheva   +5 more
doaj  

Metabolomics profile of two germinated maize flours (Atp-Y and Coca-sr) using gas chromatography-mass spectrometry (GC-MS) [PDF]

open access: yesExploration of Foods and Foodomics
Aim: The germination of maize leads to many physiological changes in the plant. These changes are responsible for the appearance, disappearance, and variation in concentration of numerous compounds, including secondary metabolites.
Stephano Tambo Tene   +1 more
doaj   +1 more source

Chemical characterization of polyol ester aviation lubricant residues [PDF]

open access: yesJournal of Synthetic Lubrication, 2008
AbstractThis study was conducted to evaluate the potential of pyrolysis gas chromatography/mass spectrometry in the electron impact and the chemical ionisation mode to characterize the chemical nature of solid deposits of polyol ester aviation lubricants generated in a laboratory test.
P. Bartl, C. Völkl, M. Kaiser
openaire   +1 more source

Polyimide foams provide thermal insulation and fire protection [PDF]

open access: yes, 1972
Chemical reactions to produce polyimide foams for application as thermal insulation and fire prevention materials are discussed. Thermal and physical properties of the polyimides are described.
Rosser, R. W.
core   +1 more source

Spectrally selective fluorescence imaging of Chlorobaculum tepidum reaction centers conjugated to chelator-modified silver nanowires [PDF]

open access: yes, 2017
A polyhistidine tag (His-tag) present on Chlorobaculum tepidum reaction centers (RCs) was used to immobilize photosynthetic complexes on a silver nanowire (AgNW) modified with nickel-chelating nitrilo-triacetic acid (Ni-NTA).
Ashraf, Khuram   +7 more
core   +1 more source

Synthesis,Characterization and Evaluation of Nano-Modified Polymeric Materials from Yellow Oleanda (Thevetia peruviana) Seed Oil [PDF]

open access: yes, 2014
The use of sustainable and biodegradable resources in the preparation of diverse industrial materials (such as organic coatings) has been revitalized due to emerging environmental challenges faced by today’s world.
Siyanbola, T. O.
core  

Closed Loop of Polyurethane Flexible Slabstock Foam Wastes by a Chemical Process [PDF]

open access: yes, 2004
Presently, about 8 million metric tons of polyurethanes are produced in the world annually. During production of precursors, semi-finished products and final products about 5 to 10 % of this amount is waste, i. e.
Behrendt, Gerhard   +5 more
core   +1 more source

Synthèse de mono-esters de sucre par biocatalyse [PDF]

open access: yes, 1992
On a réalisé la synthèse de différents mono-esters de sucre en milieu organique. Les paramètres influençant la synthèse de l'oléate de fructose par le Lipozyme ont été étudiés plus particulièrement.
Farines, Marie   +4 more
core  

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