Articles with "hplc esi" as a keyword



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Solid state fermentation of pomegranate husk: Recovery of ellagic acid by SEC and identification of ellagitannins by HPLC/ESI/MS

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Published in 2018 at "Food bioscience"

DOI: 10.1016/j.fbio.2018.01.006

Abstract: Abstract 2, 3, 7, 8-Tetrahydroxy-chromeno [5, 4, 3-cde] chromene-5, 10-dione, commonly named ellagic acid was successfully separated by size-exclusion chromatography (SEC) from pomegranate husk ellagitannins purified by solid-state fermentation. Recovery of metabolites from fermented mash… read more here.

Keywords: ellagic acid; fermentation; pomegranate husk; hplc esi ... See more keywords
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α-Glucosidase inhibition and antioxidant activity of an oenological commercial tannin. Extraction, fractionation and analysis by HPLC/ESI-MS/MS and (1)H NMR.

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Published in 2017 at "Food chemistry"

DOI: 10.1016/j.foodchem.2016.07.136

Abstract: Two batches of the oenological tannin Tan'Activ R, (toasted oak wood - Quercus robur), were extracted with ethanol. A fractionation on XAD-16 afforded four fractions for each extract. Extracts and fractions were evaluated for antioxidant… read more here.

Keywords: antioxidant activity; fractionation; activity; tannin ... See more keywords
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HPLC/ESI-MS identification of diastereomers of Impurity E - Degradation products of cefaclor.

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Published in 2020 at "Journal of pharmaceutical and biomedical analysis"

DOI: 10.1016/j.jpba.2020.113533

Abstract: A seven years old sample of cefaclor stored in room conditions, as a solid, has been analyzed by using high performence liquid chromatography/electrospray ionization-mass spectrometry. As a result of the sample degradation process, two diastereomers… read more here.

Keywords: degradation; impurity degradation; diastereomers impurity; identification diastereomers ... See more keywords
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Characterization of the Phytochemical Profiles and Biological Activities of Ajuga chamaepitys subsp. chia var. chia and Ajuga bombycina by High-Performance Liquid Chromatography–Electrospray Ionization–Tandem Mass Spectrometry (HPLC–ESI–MSn)

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Published in 2019 at "Analytical Letters"

DOI: 10.1080/00032719.2018.1500581

Abstract: Abstract This study investigates into the pharmacological potential of three solvent extracts (ethyl acetate, methanol, and water) of two Ajuga species (Ajuga chamaepitys subsp. chia var. chia and Ajuga bombycina) based on their antioxidant activity… read more here.

Keywords: esi msn; chia; hplc esi;
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In vitro antioxidant potential and in vivo effects of Schinus terebinthifolia Raddi leaf extract in diabetic rats and determination of chemical composition by HPLC-ESI-MS/MS

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Published in 2019 at "Natural Product Research"

DOI: 10.1080/14786419.2018.1425848

Abstract: Abstract The present study investigated the in vitro and in vivo antioxidant potential and phytochemical composition of Schinus terebinthifolia, which is widely used in folk medicine for various therapeutic purposes. The in vitro analyses indicated… read more here.

Keywords: vivo; schinus terebinthifolia; vitro antioxidant; composition ... See more keywords
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Characterization and quantification of bioactive compounds from Ilex paraguariensis residue by HPLC-ESI-QTOF-MS from plants cultivated under different cultivation systems.

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Published in 2021 at "Journal of food science"

DOI: 10.1111/1750-3841.15694

Abstract: Ilex paraguariensis is a perennial plant used in the production of mate tea, "chimarrão" and "tererê," cosmetics, and other food products. Its leaves are harvested every 12 or 18 months. Approximately 2 to 5 tons… read more here.

Keywords: cultivation systems; ilex paraguariensis; cultivation; bioactive compounds ... See more keywords
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Determination and Isolation of Four Anti-tumour Saponins from Lonicera macranthoides by HPLC-ESI-QTOF/MS and HSCCC.

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Published in 2017 at "Current pharmaceutical biotechnology"

DOI: 10.2174/1389201019666180226145427

Abstract: BACKGROUND Lonicera macranthoides is a Chinese herb that contains a large number of bioactive spanions possessing important pharmacological activities, such as anti-tumour activity. However, detailed information about their anti-tumor activity and bioactive compounds is limited.… read more here.

Keywords: hsccc; lonicera macranthoides; hplc esi; saponins lonicera ... See more keywords
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Bioaffinity ultrafiltration coupled with HPLC-ESI-MS/MS for screening potential α-glucosidase inhibitors from pomegranate peel

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Published in 2022 at "Frontiers in Nutrition"

DOI: 10.3389/fnut.2022.1014862

Abstract: Pomegranate peel (PoP) contains plenty of bioactive compounds and exhibits strong activity to prevent postprandial hyperglycaemia and improve diabetes mellitus. Presently, bioaffinity ultrafiltration coupled with high performance liquid chromatography-electrospray ionization mass spectrometry (HPLC-ESI-MS/MS) is employed… read more here.

Keywords: ultrafiltration coupled; bioaffinity ultrafiltration; glucosidase; hplc esi ... See more keywords
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Identification and Quantification of Urinary Microbial Phenolic Metabolites by HPLC-ESI-LTQ-Orbitrap-HRMS and Their Relationship with Dietary Polyphenols in Adolescents

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Published in 2022 at "Antioxidants"

DOI: 10.3390/antiox11061167

Abstract: This study aimed to develop and validate a liquid chromatography/electrospray ionization-linear ion trap quadrupole-Orbitrap-high-resolution mass spectrometry (HPLC/ESI-LTQ-Orbitrap-HRMS) method to identify and quantify urinary microbial phenolic metabolites (MPM), as well as to explore the relationship between… read more here.

Keywords: orbitrap hrms; orbitrap; hplc esi; esi ltq ... See more keywords
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RP-HPLC-ESI-QTOF-MS Qualitative Profiling, Antioxidant, Anti-Enzymatic, Anti-Inflammatory, and Non-Cytotoxic Properties of Ephedra alata Monjauzeana

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Published in 2022 at "Foods"

DOI: 10.3390/foods11020145

Abstract: An investigation was conducted to study the beneficial effects of Ephedra alata monjauzeana crude extract (EamCE). The chemical profile was determined using RP-HPLC–ESI-QTOF-MS analysis, revealing the presence of twenty-one flavonoids and phenolic acids. A series… read more here.

Keywords: esi qtof; hplc esi; inflammatory non; anti inflammatory ... See more keywords
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Quantification of Low Amounts of Zoledronic Acid by HPLC-ESI-MS Analysis: Method Development and Validation

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Published in 2022 at "International Journal of Molecular Sciences"

DOI: 10.3390/ijms23115944

Abstract: Zoledronic acid (ZA) is used in the treatment of various bone pathologies, but it forms complexes with calcium ions present in body fluids, decreasing ZA bioavailability. Thereby, the study first describes the identification of ZA-calcium… read more here.

Keywords: quantification; hplc esi; zoledronic acid; quantification low ... See more keywords