Results 41 to 50 of about 756,054 (237)

Evidence of late Quaternary environmental change in a continental east Antarctic lake from lacustrine sedimentary pigment distributions [PDF]

open access: yes, 2005
A sediment core from Progress Lake, one of the oldest lacustrine sequences in East Antarctica, contains distinct zones dating from a previous interglacial (most likely Marine Isotope Stage 5e, c.
Hodgson, D A, Keely, B J, Squier, A H
core   +2 more sources

Medium- and High-Pressure Integrated Chromatographic Strategies for the Isolation and Purification of Free Radical Inhibitors from Dracocephalum heterophyllum

open access: yesSeparations, 2022
Dracocephalum heterophyllum has been reported as a traditional Tibetan medicine with diverse therapeutic benefits for the effective treatment of various diseases.
Yue Lv, Ze Wang, Qilan Wang, Jun Dang
doaj   +1 more source

Quantification of sirolimus by liquid chromatography-tandem mass spectrometry using on-line solid-phase extraction [PDF]

open access: yes, 2002
Quantification of the new immunosuppressant sirolimus (syn. rapamycin; Rapamune((R))) in whole blood by chromatography is essential for its clinical use since no immunoassay is available although monitoring is mandatory.
Fleischer, Claudia   +5 more
core   +1 more source

Fast determination of biogenic amines in beverages by a core-shell particle column [PDF]

open access: yes, 2015
A fast and reliable HPLC method for the determination of 11 biogenic amines in beverages has been performed. After pre-column derivatization with dansyl-chloride a Kinetex C18 core–shell particle column (100 mm × 4.6 mm, 2.6 μm particle size) has been ...
Giuliana Vinci   +3 more
core   +1 more source

Is high pressure liquid chromatography an effective screening tool for characterization of molecular defects in hemoglobinopathies?

open access: yesIndian Journal of Pathology and Microbiology, 2013
Introduction: Hemoglobinopathies constitute entities that are generated by either abnormal hemoglobin or thalassemias. high pressure liquid chromatography (HPLC) is one of the best methods for screening and detection of various hemoglobinopathies but it ...
Nikhil Moorchung   +4 more
doaj   +1 more source

Ion liquid chromatography on-a-chip with beads-packed parylene column [PDF]

open access: yes, 2004
A parylene-MEMS ion-exchange Liquid Chromatography (LC) chip is presented here. The chip is integrated with microfluidic I/O ports, a separation column, frits/filters, and a conductivity detector.
He, Qing   +3 more
core  

Pharmacological evaluation polysaccharide complex flowers tansy [PDF]

open access: yes, 2016
From flowers tansy extracted polysaccharide complex. Installed its qualitative and quantitative composition, have developed a technique standardizing the content of reducing sugars.
Engalycheva, E. E.   +3 more
core   +2 more sources

Incidence of Neonatal Hyperphenylalaninemia Based on High-performance Liquid Chromatography Confirmatory Technique in Mazandaran Province, Northern Iran (2007–2015)

open access: yesInternational Journal of Preventive Medicine, 2017
Background: Classic phenylketonuria (PKU) is a metabolic disorder. The purpose of this study was to assess epidemiological factors of PKU phenotypes in a neonatal screening program for Mazandaran, Iran.
Ali Abbaskhanian   +6 more
doaj   +1 more source

Complete gradient-LC-ESI system on a chip for protein analysis [PDF]

open access: yes, 2005
This paper presents the first fully integrated gradient-elution liquid chromatography-electrospray ionization (LC-ESI) system on a chip. This chip integrates a pair of high-pressure gradient pumps, a sample injection pump, a passive mixer, a packed ...
Lee, T. D.   +3 more
core  

Recent developments in the rapid analysis of plants and tracking their bioactive constituents [PDF]

open access: yes, 2009
Natural products chemistry has witnessed many new developments in the last 5 years like extractions with subcritical water and ionic liquids, LC/HRMS and LC/SPE/cryo-NMR, UHPLC, TLC/MS, MS-based preparative HPLC, comprehensive chromatography (GC × GC, LC
Beek, T.A., van   +7 more
core   +2 more sources

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