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1. β-cyclodextrin modified quantum dots as pseudo-stationary phase for direct enantioseparation based on capillary electrophoresis with laser-induced fluorescence detection

Author:
Wang, Tingting; Cheng, Yuhuan; Zhang, Yulian; Zha, Jinyin; Ye, Jiannong; Chu, Qingcui; Cheng, Guifang
Source:
Talanta 2020 v.210 pp. 120629
ISSN:
0039-9140
Subject:
epicatechin,   etc   ; beta-cyclodextrin; capillary electrophoresis; catechin; derivatization; enantiomers; fluorescence; moieties; pH; quantum dots;     Show all 10 Subjects
Abstract:
... In recent years, quantum dots (QDs) have attracted a tremendous amount of attention due to their compelling features. In this work, a kind of composite QDs based on β-cyclodextrin (β-CD) and its derivatives modification was prepared, and for the first time utilized to separate and determine enantiomers in the combined system of capillary electrophoresis with laser-induced fluorescence detection (C ...
DOI:
10.1016/j.talanta.2019.120629

2. Exploration of the Substrate Diversity of Leucoanthocyanidin Reductases

Author:
Zhang, Lingjie; Wang, Peiqiang; Ma, Xue; Zhao, Wenyan; Li, Ming; Yao, Shengbo; Liu, Yajun; Gao, Liping; Xia, Tao
Source:
Journal of agricultural and food chemistry 2020 v.68 no.13 pp. 3903-3911
ISSN:
1520-5118
Subject:
epicatechin,   etc   ; Arabidopsis thaliana; Lotus corniculatus; catalytic activity; catechin; gene overexpression; mutants; oxidoreductases; proanthocyanidins; tobacco;     Show all 10 Subjects
Abstract:
... Proanthocyanidins (PAs) are mainly composed of epicatechin (EC) or catechin (C) subunits. C-type catechins (C and GC) are generally considered to be catalyzed by leucocyanidin reductase (LAR). In this study, we re-evaluated the function of LAR. LcLAR1 was isolated from Lotus corniculatus, which is rich in C-type catechins. Overexpression of LcLAR1 in tobacco resulted in a significantly increased c ...
DOI:
10.1021/acs.jafc.9b06353

3. Copigmentation potential of overripe seeds from sun‐dried white grapes on anthocyanins colour and stability by differential colorimetry

Author:
Rivero, Francisco J.; González‐Miret, Maria Lourdes; Jara‐Palacios, María José; García‐Estévez, Ignacio; Escribano‐Bailón, María Teresa; Heredia, Francisco J.; Gordillo, Belén
Source:
International journal of food science & technology 2020 v.55 no.1 pp. 389-396
ISSN:
0950-5423
Subject:
epicatechin,   etc   ; anthocyanins; biosynthesis; byproducts; catechin; color; colorimetry; gallic acid; grapes; polymerization; procyanidins; seeds; solar drying; wines;     Show all 14 Subjects
Abstract:
... Overripe seeds are wine by‐products from grapes submitted to postharvest sun drying, which induce phenolic biosynthesis and polymerisation. Overripe seeds from Pedro Ximénez (PX) and Moscatel (MO) sun‐dried grapes were compared as copigments sources to modulate grape anthocyanin (GA) colour and stability in simulated wine conditions. RRLC/MS analysis proved that overripe seeds contain specific phe ...
DOI:
10.1111/ijfs.14280

4. C-ring cleavage metabolites of catechin and epicatechin enhanced antioxidant activities through intestinal microbiota

Author:
Chen, Wanbing; Zhu, Xiaoling; Lu, Qun; Zhang, Li; Wang, Xiliang; Liu, Rui
Source:
Food research international 2020 v.135 pp. 109271
ISSN:
0963-9969
Subject:
epicatechin,   etc   ; 2,2-diphenyl-1-picrylhydrazyl; antioxidant activity; catechin; chemical structure; free radical scavengers; intestinal microorganisms; median effective concentration; metabolites;     Show all 9 Subjects
Abstract:
... The changes in DPPH radical-scavenging capability of catechin and epicatechin during 24 h incubation with fecal microbiota in vitro and the targeted analysis of the characteristic metabolites by using UPLC-Q-TOF indicated that increase in antioxidant activity was synchronous with the accumulation of C-ring cleavage metabolites. Therefore, C-ring cleavage metabolite, 1-(3′,4′-Dihydroxyphenyl)-3-(2′ ...
DOI:
10.1016/j.foodres.2020.109271

5. Simultaneous quantification of active constituents and antioxidant capability of green tea using NIR spectroscopy coupled with swarm intelligence algorithm

Author:
Guo, Zhiming; Barimah, Alberta Osei; Shujat, Ali; Zhang, Zhengzhu; Ouyang, Qin; Shi, Jiyong; El-Seedi, Hesham R.; Zou, Xiaobo; Chen, Quansheng
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2020 v.129 pp. 109510
ISSN:
0023-6438
Subject:
epicatechin,   etc   ; algorithms; antioxidant activity; caffeine; catechin; epigallocatechin gallate; green tea; least squares; near-infrared spectroscopy; prediction; system optimization; theanine;     Show all 12 Subjects
Abstract:
... A simple, rapid and low-cost analytical method was employed for simultaneous determination of bioactive constituents and antioxidant capability of green tea. The strategy was based on swarm intelligence algorithms with partial least squares (PLS) such as simulated annealing PLS (SA-PLS), ant colony optimization PLS (ACO-PLS), genetic algorithm PLS (GA-PLS), and synergy interval PLS (Si-PLS) couple ...
DOI:
10.1016/j.lwt.2020.109510

6. Ion mobility‐mass spectrometry for the separation and analysis of procyanidins

Author:
Rue, Emily A.; Glinski, Jan A.; Glinski, Vitold B.; van Breemen, Richard B.
Source:
Journal of mass spectrometry 2020 v.55 no.2 pp. e4377
ISSN:
1076-5174
Subject:
epicatechin,   etc   ; antioxidants; bioactive properties; catechin; chemical bonding; cranberries; high performance liquid chromatography; ions; mass spectrometry; polymerization; polymers; procyanidins;     Show all 12 Subjects
Abstract:
... Procyanidins are polymeric flavan‐3‐ones occurring in many plants with antioxidant and other beneficial bioactivities. They are composed of catechin and epicatechin monomeric units connected by single carbon‐carbon B‐type linkages or A‐type linkages containing both carbon‐carbon and carbon‐oxygen‐carbon bonds. Their polymeric structure makes analysis of procyanidin mixtures always difficult. Evalu ...
DOI:
10.1002/jms.4377

7. Hydrolyzable tannins from Poincianella (Caesalpinia) microphylla fruits: Metabolite profiling and anti-Trichomonas vaginalis activity

Author:
Silva, L.N.; Rigo, G.V.; Silva, D.B.; Carollo, C.A.; Trentin, D.S.; Silva, M.V.; Tasca, T.; Macedo, A.J.
Source:
Food research international 2020 v.134 pp. 109236
ISSN:
0963-9969
Subject:
epicatechin,   etc   ; Caesalpinia; Galleria mellonella; bioactive compounds; ellagic acid; fruits; humans; inhibitory concentration 50; isomers; liquid chromatography; mass spectrometry; metabolites; models; procyanidins; quinic acid; statistical analysis; tannins; toxicity;     Show all 18 Subjects
Abstract:
... Poincianella (Caesalpinia) microphylla fractions were analyzed by LC-DAD-MS and by statistical tools to determine the possible bioactive compounds against T. vaginalis. Tannins enriched-fractions toxicity (M5 and M10) were analyzed in in vitro against human red cells and in in vivo model of Galleria mellonella. Twenty-six compounds were detected from the P. microphylla fractions. The main compound ...
DOI:
10.1016/j.foodres.2020.109236

8. The application of pseudotargeted metabolomics method for fruit juices discrimination

Author:
Xu, Lei; Xu, Zhenzhen; Wang, Xue; Wang, Bingfeng; Liao, Xiaojun
Source:
Food chemistry 2020 v.316 pp. 126278
ISSN:
0308-8146
Subject:
epicatechin,   etc   ; adenosine; analysis of variance; apples; ascorbic acid; chlorogenic acid; citrus juices; cluster analysis; discriminant analysis; food industry; fruits; glutathione; grapes; metabolomics; oranges; pears; phenylalanine; principal component analysis;     Show all 18 Subjects
Abstract:
... To optimize and evaluate the pseudotargeted metabolomics for juice discrimination and authentication, five widely consumed fruit (apple, orange, pear, purple grape and mandarin) juices were selected. SWATH-MS data was acquired by various windows being calculated based on total ion current, and then 2310 and 2292 MRM transitions were generated. Most of them (1522 and 1872) were detected in positive ...
DOI:
10.1016/j.foodchem.2020.126278

9. Effect of the growing area on the methylxanthines and flavan-3-ols content in cocoa beans from Ecuador

Author:
Samaniego, Iván; Espín, Susana; Quiroz, James; Ortiz, Bladimir; Carrillo, Wilman; García-Viguera, Cristina; Mena, Pedro
Source:
Subtropical plant science 2020 v.88 pp. 103448
ISSN:
0889-1575
Subject:
epicatechin,   etc   ; beans; bioactive compounds; caffeine; catechin; chemical constituents of plants; chocolate; cocoa beans; farms; methylxanthines; nutritive value; principal component analysis; proanthocyanidins; procyanidins; theobromine; Amazonia; Ecuador;     Show all 17 Subjects
Abstract:
... Nacional is a worldwide recognized Ecuadorian cocoa variety. However, little is known regarding its phytochemical profile and how the production area influences its nutritional quality. The contents of methylxanthines (caffeine and theobromine), total polyphenols, flavan-3-ols monomers (catechin and epicatechin) and main proanthocyanidins (procyanidins B2 and C1) in beans of Nacional cocoa were ev ...
DOI:
10.1016/j.jfca.2020.103448

10. A- type doubly linked proanthocyanidin trimer and other metabolites from Canthium venosum fruits, and their biological activities

Author:
Dongmo, Appolinaire Kene; Nono, Raymond Ngansop; Kaaniche, Fatma; Mawabo, Isabelle Kamga; Frese, Marcel; Chouna, Jean Rodolphe; Nkenfou, Celine Nguefeu; Lenta, Bruno Ndjakou; Ngnokam, David; Nkeng-Efouet-Alango, Pépin; Sewald, Norbert
Source:
Phytochemistry letters 2020 v.36 pp. 134-138
ISSN:
1874-3900
Subject:
epicatechin,   etc   ; Canthium; acetylcholinesterase; antibacterial properties; antioxidants; circular dichroism spectroscopy; cytotoxicity; enzyme inhibition; fruits; inhibitory concentration 50; metabolites; nuclear magnetic resonance spectroscopy; proanthocyanidins; spectral analysis;     Show all 14 Subjects
Abstract:
... Phytochemical investigation of Canthium venosum fruits led to the isolation of a new doubly linked A-type proanthocyanidin trimer: epicatechin-(2β→O→7, 4β →8)-catechin-(5→O→2β, 6→4β)-epicatechin [venosumtannin A-1 (1)], along with twenty known compounds 2-21. Allyl (9a) and acetyl (9b) derivatives of 9 were prepared. The structures of compounds were established using comprehensive spectroscopic an ...
DOI:
10.1016/j.phytol.2020.01.020

11. Procyanidin C1 Inhibits Melanoma Cell Growth by Activating 67‐kDa Laminin Receptor Signaling

Author:
Bae, Jaehoon; Kumazoe, Motofumi; Murata, Kyosuke; Fujimura, Yoshinori; Tachibana, Hirofumi
Source:
Molecular nutrition & food research 2020 v.64 no.7 pp. e1900986
ISSN:
1613-4125
Subject:
epicatechin,   etc   ; cAMP-dependent protein kinase; cell growth; dephosphorylation; enzyme inhibitors; grapes; growth retardation; laminin; melanoma; microfilaments; myosin; neoplasm cells; phosphoprotein phosphatase; procyanidins;     Show all 14 Subjects
Abstract:
... SCOPE: Procyanidin C1 (PC1) is an epicatechin trimer found mainly in grapes that is reported to provide several health benefits. However, little is known about the molecular mechanisms underlying these benefits. The aim of this study is to demonstrate the molecular mechanisms by which PC1 operates. METHODS AND RESULTS: A 67‐kDa laminin receptor (67LR) is identified as a cell surface receptor of PC ...
DOI:
10.1002/mnfr.201900986

12. Effects of cooking on the phytochemical profile of breadfruit as revealed by high‐resolution UPLC–MSE

Author:
Pimenta do Nascimento, Talita; Barros Santos, Millena Cristina; Pimentel de Abreu, Joel; Lengruber Gonçalves Teixeira de Almeida, Iris; Barreto da Silva Feijó, Márcia; Junger Teodoro, Anderson; Simões Larraz Ferreira, Mariana; Cameron, Luiz Claudio; Bello Koblitz, Maria Gabriela
Source:
Journal of the science of food and agriculture 2020 v.100 no.5 pp. 1962-1970
ISSN:
0022-5142
Subject:
epicatechin,   etc   ; antioxidant activity; bioactive compounds; breadfruits; chemical constituents of plants; cooking; fruits; heat treatment; mass spectrometry; metabolites; pyrogallol; solvents; ultra-performance liquid chromatography;     Show all 13 Subjects
Abstract:
... BACKGROUND: This study evaluated the impact of cooking on the profile of bioactive compounds in unripe breadfruit. To this end, the accessibility of bioactive compounds by various solvents was assessed through total phenolic content and antioxidant capacity analyses. The most efficient solvent was applied to extract the metabolites, which were evaluated by ultra‐performance liquid chromatography c ...
DOI:
10.1002/jsfa.10209

13. A comparison of the phenolic composition of old and young tea leaves reveals a decrease in flavanols and phenolic acids and an increase in flavonols upon tea leaf maturation

Author:
Liu, Zhibin; Bruins, Marieke E.; de Bruijn, Wouter J.C.; Vincken, Jean-Paul
Source:
Subtropical plant science 2020 v.86 pp. 103385
ISSN:
0889-1575
Subject:
epicatechin,   etc   ; agricultural wastes; algorithms; cost effectiveness; discriminant analysis; epigallocatechin gallate; high performance liquid chromatography; leaves; mass spectrometry; phenolic acids; principal component analysis; rutin; tea; ultra-performance liquid chromatography;     Show all 14 Subjects
Abstract:
... Old tea leaves (OTL), which are normally discarded as agricultural waste, are potential sources of tea phenolic compounds. However, little details are known about their phenolic composition. In this study, the phenolic profiles of OTL and young tea leaves (YTL) were compared by using ultra-high performance liquid chromatography coupled to hybrid quadrupole Orbitrap mass spectrometry (UHPLC-Q-Orbit ...
DOI:
10.1016/j.jfca.2019.103385

14. Acute study of dose-dependent effects of (−)-epicatechin on vascular function in healthy male volunteers: A randomized controlled trial

Author:
Alañón, M.E.; Castle, S.M.; Serra, G.; Lévèques, A.; Poquet, L.; Actis-Goretta, L.; Spencer, J.P.E.
Source:
Clinical nutrition 2020 v.39 no.3 pp. 746-754
ISSN:
0261-5614
Subject:
epicatechin,   etc   ; arms (limbs); beverages; blood pressure; dose response; image analysis; liquid chromatography; males; mass spectrometry; metabolites; nitrates; nitrites; nitrogen oxides; randomized clinical trials; single nucleotide polymorphism;     Show all 15 Subjects
Abstract:
... There is convincing clinical evidence to suggest that flavanol-containing foods/beverages are capable of inducing improvements in human vascular function. However, whilst (−)-epicatechin has been tested for efficacy, a full dose-dependency has yet to be established, particularly at doses below 1 mg/kg BW. The current study examined the dose-dependent effects of (−)-epicatechin on human vascular fu ...
DOI:
10.1016/j.clnu.2019.03.041

15. Juá fruit (Ziziphus joazeiro) from Caatinga: A source of dietary fiber and bioaccessible flavanols

Author:
de Lima Oliveira, Priscila Mayara; Dantas, Aline Macedo; dos Santos Morais, Alany Raquel; Gibbert, Luciana; Krüger, Claudia Carneiro Hecke; dos Santos Lima, Marcos; Magnani, Marciane; da Silva Campelo Borges, Graciele
Source:
Food research international 2020 v.129 pp. 108745
ISSN:
0963-9969
Subject:
epicatechin,   etc   ; 2,2-diphenyl-1-picrylhydrazyl; Ziziphus joazeiro; acidity; antioxidant activity; bioavailability; caatinga; catechin; dietary fiber; epigallocatechin gallate; fiber content; fruits; nutrient content; procyanidins; succinic acid; syringic acid;     Show all 16 Subjects
Abstract:
... Fruits from Ziziphus joazeiro from Mata Paraibana (MP), Borborema (BB), Agreste (AG) and Sertão Paraibano (SP) were assessed to determine their morphological characteristics, nutritional composition, content and bioaccessibility of phenolic compounds and antioxidant activity. In general, juá fruits presented ovoid shape, high moisture (65.33–72.53%), low acidity, with succinic acid being the predo ...
DOI:
10.1016/j.foodres.2019.108745

16. Comparative Analysis of the Metabolic Profiles of Yellow- versus Black-Seeded Rapeseed Using UPLC–HESI–MS/MS and Transcriptome Analysis

Author:
Qu, Cunmin; Yin, Nengwen; Chen, Si; Wang, Shuxian; Chen, Xingyu; Zhao, Huiyan; Shen, Shulin; Fu, Fuyou; Zhou, Baojin; Xu, Xinfu; Liu, Liezhao; Lu, Kun; Li, Jiana
Source:
Journal of agricultural and food chemistry 2020 v.68 no.10 pp. 3033-3049
ISSN:
1520-5118
Subject:
epicatechin,   etc   ; color; genes; glucosinolates; isorhamnetin; kaempferol; lipids; nutritive value; oils; phenolic acids; polar compounds; proanthocyanidins; quercetin; rapeseed; secondary metabolites; seed coat; tandem mass spectrometry; transcriptomics;     Show all 18 Subjects
Abstract:
... The high levels of secondary metabolites in rapeseed play important roles in determining the oil quality and feeding value. Here, we characterized the metabolic profiles in seeds of various yellow- and black-seeded rapeseed accessions. Two hundred and forty-eight features were characterized, including 31 phenolic acids, 54 flavonoids, 24 glucosinolates, 65 lipid compounds, and 74 other polar compo ...
DOI:
10.1021/acs.jafc.9b07173

17. Association of flavonoids and flavonoid-rich foods with all-cause mortality: The Blue Mountains Eye Study

Author:
Bondonno, Nicola P.; Lewis, Joshua R.; Blekkenhorst, Lauren C.; Bondonno, Catherine P.; Shin, John HC.; Croft, Kevin D.; Woodman, Richard J.; Wong, Germaine; Lim, Wai H.; Gopinath, Bamini; Flood, Victoria M.; Russell, Joanna; Mitchell, Paul; Hodgson, Jonathan M.
Source:
Clinical nutrition 2020 v.39 no.1 pp. 141-150
ISSN:
0261-5614
Subject:
epicatechin,   etc   ; alcohol drinking; anthocyanidins; apples; exercise; food frequency questionnaires; foods; mortality; nutrient databanks; obesity; proanthocyanidins; quercetin; risk factors; risk reduction; tea;     Show all 15 Subjects
Abstract:
... Higher intakes of flavonoids provide health benefits, however, the importance of each flavonoid class and which population groups may receive the greatest protection from higher flavonoid intake warrants further investigation.To explore the associations of flavonoid and flavonoid-rich wholefood intakes with all-cause mortality and the moderating effects of early mortality risk factors.The study in ...
DOI:
10.1016/j.clnu.2019.01.004

18. Changes in methylxanthines and flavanols during cocoa powder processing and their quantification by near-infrared spectroscopy

Author:
Quelal-Vásconez, Maribel Alexandra; Lerma-García, María Jesús; Pérez-Esteve, Édgar; Arnau-Bonachera, Alberto; Barat, José Manuel; Talens, Pau
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2020 v.117
ISSN:
0023-6438
Subject:
epicatechin,   etc   ; caffeine; catechin; chemical species; cocoa beans; cocoa industry; cocoa powder; high performance liquid chromatography; least squares; methylxanthines; near-infrared spectroscopy; prediction; reflectance spectroscopy; theobromine;     Show all 14 Subjects
Abstract:
... Variation in methylxanthines (theobromine and caffeine) and flavanols (catechin and epicatechin) was studied in a large set of cocoa powders (covering different origins, processing parameters and alkalisation levels). The content of these compounds was established by high-performance liquid chromatography (HPLC), whose results showed that the alkalisation process lowered the content of all analyte ...
DOI:
10.1016/j.lwt.2019.108598

19. Flavan-3-ols and 2-diglycosyloxybenzoates from the leaves of Averrhoa carambola

Author:
Yang, Yue; Xie, Haihui; Jiang, Yueming; Wei, Xiaoyi
Source:
Fitoterapia 2020 v.140 pp. 104442
ISSN:
0367-326X
Subject:
epicatechin,   etc   ; 2,2-diphenyl-1-picrylhydrazyl; Averrhoa carambola; alpha-glucosidase; antioxidant activity; antioxidants; ascorbic acid; carboxylic ester hydrolases; cations; circular dichroism spectroscopy; diastereomers; enzyme inhibition; fruits; leaves; medicinal plants;     Show all 15 Subjects
Abstract:
... Averrhoa carambola L. (Oxalidaceae) was widely cultivated for fruits (star fruit), whereas the value of leaves remains to be discovered. Our study on the leaves yielded five flavan-3-ols (1–5) and two 2-diglycosyloxybenzoates. Their structures were determined by spectroscopic and chemical methods. Epicatechin-(5,6-bc)-4β-(p-hydroxyphenyl)-dihydro-2(3H)-pyranone (1) and benzyl 2-β-d-apiofuranosyl-( ...
DOI:
10.1016/j.fitote.2019.104442

20. Lotus seedpod proanthocyanidin-whey protein complexes: Impact on physical and chemical stability of β-carotene-nanoemulsions

Author:
Chen, Yashu; Zhang, Ruojie; Xie, Bijun; Sun, Zhida; McClements, David Julian
Source:
Food research international 2020 v.127 pp. 108738
ISSN:
0963-9969
Subject:
epicatechin,   etc   ; Lotus; antioxidant activity; antioxidants; beta-carotene; beverages; catechin; droplets; electrostatic interactions; emulsifiers; functional foods; functional properties; lipids; nanoemulsions; pH; proanthocyanidins; whey; whey protein;     Show all 18 Subjects
Abstract:
... The impact of lotus seedpod proanthocyanidin (LSPC) on the functional properties of β-carotene-loaded whey-protein stabilized nanoemulsions was investigated. LSPC was selected because it is known to exhibit strong antioxidant activity, as well as having various health benefits. Physically stable nanoemulsions containing small anionic droplets (d < 0.15 μm; ζ = −27 mV) could be formed at pH 6.5 usi ...
DOI:
10.1016/j.foodres.2019.108738