Results 71 to 80 of about 208,364 (208)

Analyzing peptides and proteins by mass spectrometry: principles and applications in proteomics [PDF]

open access: yes, 2012
Podeu consultar el llibre complet a: http://hdl.handle.net/2445/32166The study of proteins has been a key element in biomedicine and biotechnology because of their important role in cell functions or enzymatic activity. Cells are the basic unit of living
Estanyol i Ullate, Josep Maria   +3 more
core   +1 more source

Comparative Survey on Chemical Composition of the First and the Second Essential Oils of Rosa damascena Mill. in Different Locations in Iran

open access: yesJournal of Medicinal Plants, 2011
Background: Roses have been used since ancient time in rituals, cosmetics, perfumes, medicines and aromatherapy. Turkey, the main rose oil producer in the world, uses R. damascena Mill. for rose oil production.
Tayebeh Shamspur, Ali Mostafavi
doaj  

In Situ Synthesis of Hypercrosslinked Polymer as Stationary Phase for Capillary Gas Chromatography

open access: yesSeparations
Hypercrosslinked polymers (HCPs) constructed by the Friedel–Crafts alkylation reaction of aromatic compounds have emerged as a new class of porous materials with unique merit. Herein, a HCP named HCP-TPB was coated onto a capillary column through in situ
Yan Wu   +7 more
doaj   +1 more source

Identification of arachidonate epoxides/diols by capillary chromatography-mass spectrometry.

open access: yesJournal of Lipid Research, 1995
The identification of epoxide regioisomers of arachidonic acid (EETs) as methyl esters is difficult because they coelute during gas chromatography and possess similar mass spectra.
M VanRollins, H R Knapp
doaj   +1 more source

The development of a method to determine felinine in body fluids by capillary electrophoresis : a thesis presented in partial fulfilment of the requirements for the degree of Master of Philosophy in Chemistry at Massey University [PDF]

open access: yes, 1999
Ion-exchange, paper-chromatography and high performance liquid chromatography were used in earlier studies for the determination of felinine in biological fluids. These methods were either inadequate and/or need laborious sample pre-treatments.
Zhang, Fengying
core  

Triacylglycerols and fatty acids composition of egusi seed oil (Cucumeropsis Mannii Naudin)

open access: yesGrasas y Aceites, 1993
Triacylglycerols were determined from a Cameroonian (African) white egusi seed oil (Cucumeropsis Mannii Naudin) using reversed phase high performance liquid chromatography.
C. Kapseu, R. Kamga, J. B. Tchatchueng
doaj   +1 more source

Nitrogen isotope analysis of ammonium and glycine [PDF]

open access: yes, 2005
Stable isotope techniques can be used as a tool in nitrogen cycling studies of different ecosystems. The studies are based on measurement of the heavy (15N)- to- light (14N) isotopic ratios of nitrogen in different biospheric pools.
Norlin, Elin
core  

Separation Technique for the Determination of Highly Polar Metabolites in Biological Samples

open access: yesMetabolites, 2012
Metabolomics is a new approach that is based on the systematic study of the full complement of metabolites in a biological sample. Metabolomics has the potential to fundamentally change clinical chemistry and, by extension, the fields of nutrition ...
Yusuke Iwasaki   +8 more
doaj   +1 more source

Modes of entry of petroleum distilled spray-oils into insects: a review [PDF]

open access: yes, 2009
Petroleum oils are some of the oldest and safest pesticides in use. In spite of the numerous improvements achieved in oil technology, the mode of entry and the insecticide action mechanism of these products have been the subject of considerable debate ...
Buteler, Micaela, Stadler, Teodoro
core  

Évaluation de la biodiversité de quelques cucurbitacées d’Afrique subsaharienne à partir des données chromatographiques (CGC et CLHP)

open access: yesOléagineux, Corps gras, Lipides, 2008
Two triacylglycerol quantitative analysis methods, needing none standard, using liquid chromatography coupled with light scattering detection, as well as fatty acid methyl esters quantitative analysis using capillary gas chromatography were led.
Maloumbi Marie Geneviève   +4 more
doaj   +1 more source

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