Search Results - "Gliński, Jan A"
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Trimeric and Tetrameric A‑Type Procyanidins from Peanut Skins
Published in Journal of natural products (Washington, D.C.) (24-02-2017)“…Peanut skins are a rich source of oligomeric and polymeric procyanidins. The oligomeric fractions are dominated by dimers, trimers, and tetramers. A multistep…”
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Spontaneous Stereoselective Oxidation of Crystalline Avermectin B1a to Its C‑8a‑(S)‑Hydroperoxide
Published in Journal of natural products (Washington, D.C.) (27-12-2019)“…Prolonged storage of technical abamectin as well as avermectin B1a samples yielded a previously unknown derivative, designated here as compound 1. Detailed NMR…”
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3
Spontaneous Stereoselective Oxidation of Crystalline Avermectin B 1a to Its C-8a-( S )-Hydroperoxide
Published in Journal of natural products (Washington, D.C.) (27-12-2019)“…Prolonged storage of technical abamectin as well as avermectin B samples yielded a previously unknown derivative, designated here as compound . Detailed NMR…”
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4
Isolation of 1-(3',4'-Dihydroxyphenyl)-3-(2″,4″,6″-trihydroxyphenyl)-propan-2-ol from Grape Seed Extract and Evaluation of its Antioxidant and Antispasmodic Potential
Published in Molecules (Basel, Switzerland) (04-07-2019)“…HPLC profiling of phenolics in grape seed extracts revealed a prominent peak of an unknown substance with concentrations up to 5.3%. Spectroscopic data allowed…”
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5
Conformational equilibria in selected A-type trimeric procyanidins
Published in Organic & biomolecular chemistry (28-12-2014)“…A-type procyanidin trimers cinnamtannin B-1, cinnamtannin D-1, lindetannin, and aesculitannin B were studied in terms of their conformation and interaction…”
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6
Determination of Ursolic and Oleanolic Acid in Sambuci Fructus
Published in Chemistry & biodiversity (01-12-2014)“…Elderberries are used in the preparation of pie, jelly, punch, wine, or liqueur, as well as in many herbal remedies and food supplements. Elderberry products…”
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Novel and unusual triterpene from Black Cohosh. Determination of structure of 9,10- seco-9,19-cyclolanostane xyloside (cimipodocarpaside) by NMR, IR and Raman spectroscopy and DFT calculations
Published in Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (2011)“…A new triterpene xyloside, designated cimipodocarpaside was isolated from a Black Cohosh ( Actea racemosa L.) extract and its structure was elucidated by means…”
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One new and six known triterpene xylosides from Cimicifuga racemosa: FT-IR, Raman and NMR studies and DFT calculations
Published in Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (01-07-2012)“…[Display omitted] ► Structure of one new triterpene xyloside (isocimipodocarpaside). ► Determination of stereochemistry of 26-deoxycimicifugoside. ►…”
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9
Isolation of Echimidine and Its C-7 Isomers from Echium plantagineum L. and Their Hepatotoxic Effect on Rat Hepatocytes
Published in Molecules (Basel, Switzerland) (30-04-2022)“…Echimidine is the main pyrrolizidine alkaloid of L., a plant domesticated in many countries. Because of echimidine's toxicity, this alkaloid has become a…”
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C CPMAS NMR studies and DFT calculations of triterpene xylosides isolated from Actaea racemosa
Published in Journal of molecular structure (2011)“…¹³C CPMAS NMR spectra of four triterpene glycosides: cimigenol xyloside (1), 26-deoxyactein (2), cimicifugoside H-1 (3) and 24-acethylhydroshengmanol xyloside…”
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11
Conformational preferences of cocoa oligomeric proanthocyanidins and their influence on polarity
Published in Journal of Chromatography A (11-10-2024)“…•Oligomeric proanthocyanidins with 7 to 10 units tend to assume a spherical shape.•The observed conformational preferences influence polarity of…”
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Characterization of primary standards for use in the HPLC analysis of the procyanidin content of cocoa and chocolate containing products
Published in Molecules (Basel, Switzerland) (15-10-2009)“…This report describes the characterization of a series of commercially available procyanidin standards ranging from dimers DP = 2 to decamers DP = 10 for the…”
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13
Influence of Degree-of-Polymerization and Linkage on the Quantification of Proanthocyanidins using 4‑Dimethylaminocinnamaldehyde (DMAC) Assay
Published in Journal of agricultural and food chemistry (23-03-2016)“…Proanthocyanidins (PACs) are naturally occurring flavonoids possessing health beneficial bioactivities. Their quantification often utilizes the…”
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14
Rapid Determination of Procyanidins Using MALDI-ToF/ToF Mass Spectrometry
Published in Journal of agricultural and food chemistry (31-10-2018)“…Although procyanidins constitute a unique class of polymeric plant secondary metabolites with a variety of biological properties including potent antioxidant…”
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(13)C, (15)N CPMAS NMR and GIAO DFT calculations of stereoisomeric oxindole alkaloids from Cat's Claw (Uncaria tomentosa)
Published in Solid state nuclear magnetic resonance (01-11-2008)“…Oxindole alkaloids, isolated from the bark of Uncaria tomentosa [Willd. ex Schult.] Rubiaceae, are considered to be responsible for the biological activity of…”
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Ion mobility‐mass spectrometry for the separation and analysis of procyanidins
Published in Journal of mass spectrometry. (01-02-2020)“…Procyanidins are polymeric flavan‐3‐ones occurring in many plants with antioxidant and other beneficial bioactivities. They are composed of catechin and…”
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17
Optimized analysis and quantification of glucosinolates from Camelina sativa seeds by reverse-phase liquid chromatography
Published in Industrial crops and products (01-05-2013)“…► Camelina is an emerging new biofuel crop in North America. ► Camelina glucosinolates were purified by a combination of preparative reverse-phase,…”
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Survey of the trans-Resveratrol and trans-Piceid Content of Cocoa-Containing and Chocolate Products
Published in Journal of agricultural and food chemistry (24-09-2008)“…Dietary resveratrol (3,4′,5-trihydroxystilbene) has been implicated in the health benefits associated with grapes and red wine, more specifically with…”
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Bioactive A-Type Proanthocyanidins from Cinnamomum cassia
Published in Journal of natural products (Washington, D.C.) (23-09-2011)“…Two trimeric proanthocyanidins, cinnamtannin B-1 (1) and cinnamtannin D-1 (2), have been isolated from the bark of Cinnamomum cassia along with the known…”
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20
13C CPMAS NMR studies and DFT calculations of triterpene xylosides isolated from Actaea racemosa
Published in Journal of molecular structure (17-05-2011)“…13C CPMAS NMR spectra of four triterpene glycosides: cimigenol xyloside ( 1), 26-deoxyactein ( 2), cimicifugoside H-1 ( 3) and 24-acethylhydroshengmanol…”
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