Results 51 to 60 of about 54,757 (260)

HPLC–DAD method for comprehensive quality control of Semen Strychni [PDF]

Pharmaceutical Biology, 2013
Semen Strychni is the seed of Strychnos nux-vomica L. (Loganiaceae). Its quality control procedure remains an issue since previous reports only focused on Strychnos alkaloids. To the best of our knowledge, chlorogenic acid (a phenolic acid) and loganin (an iridoid glycoside) are selected for the first time as marker constituents of quality control for ...
Huai-Bo, Tang, Hua-Lin, Cai, Huan-De, Li, Lin-Jun, Zhang, Xiang-Lin, Li, Ji-Hui, Tang, Mei-Ling, Chen   +6 more
openaire   +2 more sources

HPLC-DAD Evidence of the Oscillatory Chiral Conversion of Phenylglycine [PDF]

Journal of Chromatographic Science, 2013
Previous studies by the authors have used thin-layer chromatography to demonstrate the ability of chiral low molecular weight carboxylic acids to undergo spontaneous oscillatory chiral conversion in abiotic (aqueous and nonaqueous) solutions. General mechanisms of this conversion were proposed, taking into account the enol/enolate anion intermediary ...
Mieczysław, Sajewicz, Monika, Gontarska, Teresa, Kowalska   +2 more
openaire   +2 more sources

Comparison of Capillary Electrophoresis and HPLC-Based Methods in the Monitoring of Moniliformin in Maize

Foods
Over the past few decades, scientific interest in mycotoxins—fungal metabolites that pose serious concern to food safety, crop health, and both human and animal health—has increased. While major mycotoxins such as aflatoxins, ochratoxins, deoxynivalenol,
Sara Astolfi, Francesca Buiarelli, Francesca Debegnach, Barbara De Santis, Patrizia Di Filippo, Donatella Pomata, Carmela Riccardi, Giulia Simonetti   +7 more
doaj   +1 more source

Intraspecific variability of Holostylis reniformis: concentration of lignans, as determined by maceration and supercritical fluid extraction (SFE-CO2), as a function of plant provenance and plant parts

Química Nova, 2014
Maceration and supercritical fluid extraction were used to prepare extracts from parts of plants (Holostylis reniformis) collected in two different regions of Brazil.
Gislaine F. Martins, Marcos D. P. Pereira, Lucia M. X. Lopes, Tito da Silva, Paulo de T. Vieira e Rosa, Fernanda P. Barbosa, Gisele B. Messiano, Antoniana U. Krettli   +7 more
doaj   +1 more source

Determination of estrogens in drinking water using HPLC-DAD [PDF]

, 2010
An analytical procedure for determination of estriol, 17β-estradiol, estrone and 17α-ethinylestradiol in drinking water is presented. The method employs solid phase extraction (SPE) and sample dechlorination as cleanup procedures, followed by ...
NUNES, Gilvanda Silva, VERBINNEN, Raphael Teixeira, VIEIRA, Eny Maria   +2 more
core   +2 more sources

Tissue Engineered Human Elastic Cartilage From Primary Auricular Chondrocytes for Ear Reconstruction

Advanced Functional Materials, EarlyView.
Despite over three decades of research, no tissue‐engineered solution for auricular reconstruction in microtia patients has reached clinical translation. The key challenge lies in generating functional elastic cartilage ex vivo. Here, we integrate synergistic cell‐biomaterial strategies to engineer auricular grafts with mechanical and histological ...
Philipp Fisch, Sandra Kessler, Simone Ponta, Anna Puiggalí‐Jou, Guoliang Lyu, Killian Flégeau, Anastasiya Martyts, Florian Roth, David Fercher, Filippo M. Rijli, Daniel Simmen, Eva Novoa Olivares, Thomas Linder, Marcy Zenobi‐Wong   +13 more
wiley   +1 more source

Incorporating PET-MIL-101(Fe) within cellulose acetate membrane for thin film microextraction of neonicotinoid insecticides in water

Scientific Reports
Herein, cellulose acetate membrane modified with polyethylene terephthalate derived MIL-101(Fe) (PET-MIL-101(Fe)) was used as an extraction phase for the direct immersion-thin film microextraction method (DI-TFME) of neonicotinoid insecticides in water ...
Silindokuhle Jakavula, Neliswa Mpayipheli, Azile Nqombolo, Jianwei Ren, Philiswa Nosizo Nomngongo   +4 more
doaj   +1 more source

Phenolic composition of jussara (Euterpe edulisMartius) from Minas Gerais and Espírito Santo, Brazil, determined by high performance liquid chromatography coupled to diode array detection and electrospray ionization tandem mass spectrometry (HPLC-DAD-ESI-MS)

Ciência Rural, 2022
: This research assessed the phenolic composition of Jussara pulp from the Brazilian states of Minas Gerais (MG) and Espírito Santo (ES) using HPLC-DAD-MS/MS.
Carolina Tatagiba da Rocha Dadalto, Isidro Hermosín-Gutiérrez, José Pérez-Navarro, Rosa Maria Ojeda-Amador, Sergio Gómez-Alonso, Paulo César Stringheta, Daniele de Almeida Paula, Marcos Roberto Moacir Ribeiro Pinto, Afonso Mota Ramos   +8 more
doaj   +1 more source

HPLC/DAD Screening Method for Selected Psychotropic Drugs in Blood

Toxicology Mechanisms and Methods, 2003
The influence of experimental conditions on gradient high-performance liquid chromatography/diode array detector separation and identification of 13 psychotropic drugs belonging to two groups--phenothiazines and tricyclic antidepressants--was examined.
Madej, Katarzyna, Parczewski, Andrzej, Kała, Maria   +2 more
openaire   +3 more sources

Light Switchable Ionic Conductivity of Arylazopyrazole Modified Polysiloxanes

Advanced Materials Technologies, EarlyView.
We present a polysiloxane functionalized with a novel arylazopyrazole dye that undergoes reversible photoisomerization. Upon lithium bis(trifluoromethanesulfonyl)imide addition and UV irradiation, the polymer exhibits a shift in tan(d) toward higher frequencies and enhanced ionic conductivity.
Malte S. Beccard, Thulasinath Raman Venkatesan, Michael Bauer, Valentin Razvan Lupu, Philipp Scheidegger, Francesco Taddei, Frank A. Nüesch, Dorina M. Opris   +7 more
wiley   +1 more source