Results 11 to 20 of about 458,942 (313)

Ultra-High-Pressure Liquid Chromatography ☆ [PDF]

, 2017
One decade has passed since the introduction of commercial ultra-high-pressure liquid chromatography (UHPLC) technology and columns packed with sub-2-μm particles, which has led to significant improvements in separation efficiency and sample throughput. This article outlines fundamental and practical aspects of UHPLC.
Eeltink, Sebastiaan, De Vos, Jelle
openaire   +2 more sources

Separation of the natural retinoids by high-pressure liquid chromatography

Journal of Lipid Research, 1978
A reverse phase high-pressure liquid chromatography system for rapid separation of various retinoids (vitamin A and its analogs) with little or no degradation is described. This method permits detection of as little as 22 pmol of retinoic acid.
C A Frolik, T E Tavela, M B Sporn
doaj   +1 more source

Application of New Supercritical Extraction Technology in Extraction and Separation of Effective Components of Traditional Chinese Medicine [PDF]

MATEC Web of Conferences, 2021
Supercritical CO2 extraction technology uses supercritical CO2 fluid as extractant to extract and separate effective components from plants from liquid or solid. At present, CO2 is widely used in supercritical fluid, with a critical temperature of 31.265
Cheng Lijuan
doaj   +1 more source

Current developments in LC-MS for pharmaceutical analysis [PDF]

, 2002
The current developments in liquid chromatography-mass spectrometry (LC-MS) and its applications to the analysis of pharmaceuticals are reviewed. Various mass spectrometric techniques, including electrospray and nanospray ionization, atmospheric pressure
Lim, Chang-Kee, Lord, Gwyn A.
core   +1 more source

High pressure liquid chromatography solvent systems for studies of bile acid biosynthesis.

Journal of Lipid Research, 1988
Reversed phase high pressure liquid chromatography (HPLC) solvent systems have been developed for the separation of intermediates in the formation of bile acids and bile acid conjugates from cholesterol.
K Prydz, B F Kase, J I Pedersen
doaj   +1 more source

Bacterial Cell Wall Precursor Phosphatase Assays Using Thin-layer Chromatography (TLC) and High Pressure Liquid Chromatography (HPLC)

Bio-Protocol, 2018
Peptidoglycan encases the bacterial cytoplasmic membrane to protect the cell from lysis due to the turgor. The final steps of peptidoglycan synthesis require a membrane-anchored substrate called lipid II, in which the peptidoglycan subunit is linked to ...
Manuel Pazos, Christian Otten, Waldemar Vollmer   +2 more
doaj   +1 more source

STRUCTURE OF METHYLPHEOPHORBIDE-RCI [PDF]

, 1986
he methanolic extract of the cyanobacterium (blue-green alga) Spirulina geitleri has been treated with methanolic acid to convert all chlorophyllous pigments to their methylpheophorbides.
Budzikiewicz H., Dismukes G. C., Dornemann D., Dornemann D., Dornemann D., Feher G., Fischer H., Fuhrhop J.H., Harrison J. E., Hynninen P. H., Hynninen P. H., Klimov V. V., Knaff D. B., Moore R. E., Norris J.R., O'Malley P. J., Schaffernicht H., Schatz G. H., Scheer H., Scheer H., Senger H., Svec W. A., Thomas J. A., Vacek K., Vierling E., Wasielewski M., Wu S.M., Yuasa M.   +27 more
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Inhibitory compound produced by Pseudomonas with effectiveness on Vibrio harveyi [PDF]

, 2010
Persistence of the antivibrio property of the potential antagonistic probiotics, Pseudomonas MCCB 102 and 103, at di¡erent temperatures, pH and in organic solvents was studied.
Bright Singh, I S, Jayaprakash, N S, Jose, Seena, Philip, Rosamma, Preetha, R, Sreedharan, P, Vijayan, K K   +6 more
core   +1 more source

Quantitative estimation of urinary ortho-cresol by high pressure liquid chromatography for biomonitoring of toluene exposed population

Environmental Disease, 2020
Aim: Quantification of urinary ortho-cresol (OC) by high pressure liquid chromatography coupled with photodiode array detector. Materials and Methods: Includes acid hydrolysis of urine, liquid–liquid extraction, and chromatography quantification of ...
Anupa Yadav, Amit Chakrabarti, Geoffrey Nengzapum   +2 more
doaj   +1 more source

Analysis of total urinary catecholamines by liquid chromatography: methodology, routine experience and clinical interpretations of results [PDF]

, 1983
A simple routine method is described for simultaneous assay of total urinary adrenaline, noradrenaline and dopamine. The catecholamines are pre-purified on a small ion-exchange column, separated by reversed phase ion-pair liquid chromatography, and are ...
Kees, Frieder K., Schleicher, E. D., Wieland, O. H.   +2 more
core   +1 more source