Results 31 to 40 of about 185,243 (332)

Development and validation of an high-performance liquid chromatographic, and a ultraviolet spectrophotometric method for determination of Ambroxol hydrochloride in pharmaceutical preparations

Journal of Advanced Pharmaceutical Technology & Research, 2013
A high-performance liquid chromatographic (HPLC) and ultraviolet (UV) methods were developed and validated for the quantitative determination of Ambroxol hydrochloride (AMH) in pharmaceutical dosage form.
Selvadurai Muralidharan, Jaya Raja Kumar, Sokkalingam Arumugam Dhanara   +2 more
doaj   +1 more source

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

, 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, Marta Letizia Antonelli, Raffaella Preti, Roberta Bernacchia   +3 more
core   +1 more source

New N-alkylamides from Anacyclus pyrethrum [PDF]

, 2011
The roots of Anacyclus pyrethrum DC (Asteraceae) are frequently used in traditional medicine e.g. as aphrodisiac [1]. Depending on the extraction method and solvent, different yields of N-alkylamide constituents can be found, possibly resulting in ...
Boonen, Jente, De Spiegeleer, Bart, Dixit, Vinot, Sharma, Vikas   +3 more
core   +2 more sources

Evaluation of Phenolic Compounds inTilia rubraSubsp.caucasicaby HPLC-UV and HPLC-UV-MS/MS

International Journal of Food Properties, 2013
Profile of phenolic compounds of Tilia rubra subsp. caucasica was measured by high performance liquid chromatography coupled with ultraviolet and tandem mass spectroscopy. Three different extraction methods (methonolic, selective extraction, and acidic hydrolysis) were used to evaluate phenolic composition and antioxidant capacity in three different ...
Akyuz, Emine, Sahin, Huseyin, Islamoglu, Fatih, Kolayli, Sevgi, Sandra, Pat   +4 more
openaire   +2 more sources

Analysis of sennoside in drugs contained senna leaves (Cassia sp.) in Iran [PDF]

Research Journal of Pharmacognosy, 2017
Background and objectives: The importance of Cassia angustifulia is due to its laxative properties. A large number of sennosides have been reported in senna but sennoside A and B have been reported as the main causes of its properties.
M. Tayefeh, F. Yousefbeyk, N. Azizi, S.K. Sajady, S. Ghasemi*   +4 more
doaj  

An HPLC-UV Method to Assess Human Plasma 25(OH)D₃. [PDF]

Nutrients
The aim of this study was to validate an HPLC-UV method to assess vitamin D status by determining the linearity and precision of the 25-hydroxyvitamin D3 (25(OH)D3) calibration curve, the limits of detection, quantitation and robustness of the method, and its accuracy. A second stock solution of 25(OH)D3 was prepared (500 ng/mL), and working dilutions (
Tijerina A, Garza A, López A, Cavazos N, Romo A, Heya MS, Bouzas C, Tur JA, Salas R.   +8 more
europepmc   +4 more sources

HPLC–UV–MS Analysis: A Source for Severe Oxidation Artifacts [PDF]

Analytical Chemistry, 2019
HPLC coupled to both UV and MS is an established setup for purity assessments in many areas. With evolving technology, instrument sensitivity increases, calling for lower sample concentration, while light flux in a commercial UV detector cell is considerably higher than earlier. This evolution has now reached the point where radicals formed by UV light
Fritz Schweikart, Gustaf Hulthe
openaire   +2 more sources

DNMTs are required for delayed genome instability caused by radiation [PDF]

, 2012
This is an open-access article licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. The article may be redistributed, reproduced, and reused for non-commercial purposes, provided the original source is properly cited ...
Anderson, RM, Armstrong, CA, Iyer, P, Jones, GD, Narayanan, D, Sandhu, J, Singh, R, Talbot, CJ, Talbot, CJ, Tufarelli, C, Tufarelli, C   +10 more
core   +2 more sources

Effect of Sample Preparation and Chromatographic Conditions on Background Signal

Регуляторные исследования и экспертиза лекарственных средств, 2020
The HPLC-UV method is widely used for quantitative analysis of drug substances found in biological samples obtained in pharmacokinetics studies, bioequivalence studies, or during therapeutic drug monitoring.
V. M. Kosman, M. V. Karlina, O. N. Pozharitskaya   +2 more
doaj   +1 more source

Simultaneous quantification of 12 different nucleotides and nucleosides released from renal epithelium and in human urine samples using ion-pair reversed-phase HPLC [PDF]

, 2012
Nucleotides and nucleosides are not only involved in cellular metabolism but also act extracellularly via P1 and P2 receptors, to elicit a wide variety of physiological and pathophysiological responses through paracrine and autocrine signalling pathways.
Alberto Contreras-Sanz, BD Gill, C Crawford, Claire M. Peppiatt-Wildman, DR Ferguson, DR Schneider, EM Schwiebert, EW Inscho, EW Inscho, FQ Yang, G Burnstock, G Burnstock, G Burnstock, G Manfredi, G Xu, HA Neufeld, HA Praetorius, HA Praetorius, Hardyal S. Gill, HM Liebich, I Kugelgen von, I Kugelgen von, J Czarnecka, James Malone-Lee, JC Mathies, Jennifer C. Jacoby, JM Buescher, JO Svensson, JR Gever, K Sugaya, Kevin M. G. Taylor, KH Schram, KR Kim, LA Birder, LC Rump, LD Todorov, M Cichna, M Katayama, MA Bailey, N Ozer, N Yamaoka, NS Zur, P Bodin, P Vinas, PD Wilson, R Corriden, RC Calvert, Rebecca E. Birch, RL Cordell, S Tatur, S Wiener, SA Levesque, Scott S. P. Wildman, Toby S. Scott-Ward, V Jankowski, V Kumar, W Yu, Y Cheng, Y Sun, Y Sun, Y Zheng   +60 more
core   +2 more sources