Results 61 to 70 of about 208,364 (208)

Light-emitting diodes and photodiodes in the deep ultra-violet range for absorption photometry in liquid chromatography, capillary electrophoresis and gas sensing [PDF]

open access: yes, 2016
Absorbance measurement in the deep ultra-violet range (below 300 nm) has been one of the most widely used detection methods for analytical techniques as a large number of organic compounds have strong absorption bands in the deep UV region.
Bui, Duy Anh
core   +1 more source

Chromatography of beer [PDF]

open access: yes, 2013
The objectives of the review are the collection, concise description and evaluation of the various chromatographic techniques used for the separation and quantitative determination of macro- and microcomponents present in ...
Cserháti, Tibor, Szőgyi, Mária
core  

A general perspective of the characterization and quantification of nanoparticles: Imaging, spectroscopic, and separation techniques [PDF]

open access: yes, 2014
This article gives an overview of the different techniques used to identify, characterize, and quantify engineered nanoparticles (ENPs). The state-of-the-art of the field is summarized, and the different characterization techniques have been grouped ...
Anderson de la LLana, S.   +10 more
core   +3 more sources

Trans isomers contents of the fatty acids in meat products. (I) Sausages

open access: yesGrasas y Aceites, 1991
We have studied the trans isomers contents of the fatty acids fraction in several types of Spanish sausages, after a previous fat extraction and gas chromatography determination using CP Sil 88 coated capillary columns.
N. Hernández   +3 more
doaj   +1 more source

Pollinator-attracting semiochemicals of the wasp-flower Epipactis helleborine [PDF]

open access: yes, 2008
The orchid genus Epipactis is represented by 25 species in Europe (Richards 1982). Epipactis helleborine (L.) Crantz is the most common and widely distributed species of the genus (Wiefelspütz 1970), and is a prime example for wasp-flowers, because it is
Ayasse, Manfred   +3 more
core  

Does ursodeoxycholic acid change the proliferation of the colorectal mucosa? A randomized, placebo-controlled study [PDF]

open access: yes, 2003
Background: In animal models ursodeoxycholic acid (UDCA) showed a chemoprotective effect against colon cancer. To explain this, a reduced proliferation of the colorectal mucosal proliferation was suggested.
Diebold, J.   +6 more
core   +1 more source

Metabolomic analysis of human oral cancer cells with adenylate kinase 2 or phosphorylate glycerol kinase 1 inhibition. [PDF]

open access: yes, 2017
The purpose of this study was to use liquid chromatography-mass spectrometry (LC-MS) with XCMS for a quantitative metabolomic analysis of UM1 and UM2 oral cancer cells after knockdown of metabolic enzyme adenylate kinase 2 (AK2) or phosphorylate glycerol
Cheng, Siliangyu   +6 more
core   +1 more source

Molecular study of lipids in humic acids by sequential chemical degradation [PDF]

open access: yes, 2009
Lipidy v půdě vykazují poměrně vysokou resistenci k biodegradaci, mohou proto tak zajistit informace o zdrojích organické hmoty a diagenetických procesech. Půdní organická hmota je vysoce heterogenní a vyskytují se v ní různé dynamické systémy.
Bachratá, Radka
core  

Volatile compounds from leaves of Aegle marmelos (L.) Correa grown in Cuba

open access: yesRevista CENIC Ciencias Químicas, 2005
Aegle marmelos (L.) Correa which belongs to the Rutaceae family is abundantly available all over India. Almost every part of the plant is used in traditional medicine of this region. Volatile compounds from leaves of plants grown in Cuba were isolated by
Jorge A. Pino   +2 more
doaj  

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