scholarly journals Effect of Chitosan on the Removal of Different Types of Tannins from Red Wines

2021 ◽  
Vol 11 (24) ◽  
pp. 11743
Author(s):  
Luigi Picariello ◽  
Francesco Errichiello ◽  
Francesca Coppola ◽  
Alessandra Rinaldi ◽  
Luigi Moio ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Phenolic Compounds ◽  
Condensed Tannins ◽  
Precipitation Index ◽  
Salivary Proteins ◽  
Red Wines ◽  
Different Types ◽  
Colour Parameters ◽  
Previously Treated

(1) Background: most premium red wines are rich in tannins but the effect of chitosan on these macromolecules is unknown. In this work, the effect of a treatment with 0.5 g/L of chitosan on red wines, W, enriched with condensed tannins, CT, ellagitannins, ET, and gallotannins, GT, was evaluated. In addition, to understand if the effect of C was stable during wine evolution, treated wines underwent an oxidative stress simulating an exposure to 18 mg/L of oxygen. (2) Methods: parameters describing the reactivity of phenolic compounds were determined: iron reactive phenolics, BSA reactive tannins, vanillin reactive tannins, and the saliva precipitation index. Individual anthocyanins, total and polymeric pigments and chromatic characteristics were evaluated to determine the influence of each treatment on colour parameters. (3) Results: a decrease in BSA reactive tannins after the addition of C was detected for all wines and the effect persisted after oxidation. W and CT wines previously treated with C and oxidized showed a significant decrease in the reactivity towards salivary proteins. C caused a lower formation of polymeric pigments in all wines. (4) Conclusion: these results suggest a possible use of C to treat wines very rich in condensed tannins and excessively astringent.

Partial dealcoholisation of red wines by membrane contactor technique: influence on colour, phenolic compounds and saliva precipitation index

2011 ◽  
Vol 233 (4) ◽  
pp. 647-655 ◽  
Author(s):  
Angelita Gambuti ◽  
Alessandra Rinaldi ◽  
Maria Tiziana Lisanti ◽  
Rita Pessina ◽  
Luigi Moio
Keyword(s):  
Phenolic Compounds ◽  
Precipitation Index ◽  
Membrane Contactor ◽  
Red Wines

scholarly journals Chemical Composition of Essential Oil, Phenolic Compounds Content, and Antioxidant Activity of Cistus monspeliensis from Northern Morocco

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Sara Haida ◽  
Kaltoum Bakkouche ◽  
Abdelaziz Ramadane Kribii ◽  
Abderahim Kribii
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Condensed Tannins ◽  
Natural Antioxidants ◽  
Health It ◽  
Total Polyphenols ◽  
Antioxidant Power ◽  
Liquid Liquid Extraction ◽  
Ferric Reducing Antioxidant Power

Currently, oxidative stress is one of the major problems that threatens human health. It is at the root of many diseases such as cancer. Despite the enormous efforts provided to combat this scourge, oxidative stress is still relevant and hence comes the need for research of new remedies especially from natural origin. For this purpose, the study of the antioxidant activity of extracts of Cistus monspeliensis from Morocco is a principal research objective. The phenolic extracts were obtained by maceration of the plant in a water/acetone mixture and then separated by liquid/liquid extraction with solvents of increasing polarity. The first phytochemical tests carried out on these extracts showed the existence of different families of phenolic compounds, such as flavonoids, tannins, and others. Assays for total polyphenols, flavonoids, hydrolysable, and condensed tannins were carried out by known colorimetric methods. The results of these assays have shown that the studied extracts are rich in phenolic compounds present in the plant in the form of flavonoids (69.81 ± 0.22 mg EQ/g DM), hydrolysable tannins (61.86 ± 0.89 mg ETA/g DM), and condensed tannins (70.05 ± 1.61 mg EC/g DM). The evaluation of the antioxidant activity is carried out by two different methods: the DPPH test (2,2-DiPhenyl-1-Picryl-Hydrazyl) and the FRAP test (Ferric Reducing Antioxidant Power). The results obtained show that the extracts of Cistus monspeliensis are active and have interesting antioxidant powers. In particular, the water/acetone (WAE) (IC50 = 0.079 mg/mL) and butanolic (BUE) (IC0.5 = 0.099 mg/mL) extracts are the most active with values comparable to that of ascorbic acid. The interesting results obtained in this study clearly show that Cistus monspeliensis originating from Morocco can be considered as a source of natural antioxidants. Therefore, the extracts of this plant deserve to be tested in the medicinal field, against cancer and cardiovascular diseases, and in food field as an additive and preservative.

Stability of phenolic compounds, antioxidant activity and colour parameters of a coloured extract obtained from coloured-flesh potatoes

LWT ◽  
2021 ◽  
Vol 136 ◽  
pp. 110370
Author(s):  
Stefano Ercoli ◽  
Jennifer Cartes ◽  
Pablo Cornejo ◽  
Gonzalo Tereucán ◽  
Peter Winterhalter ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Colour Parameters

scholarly journals Light and CO2 Modulate the Accumulation and Localization of Phenolic Compounds in Barley Leaves

Antioxidants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 385
Author(s):  
Lena Hunt ◽  
Karel Klem ◽  
Zuzana Lhotáková ◽  
Stanislav Vosolsobě ◽  
Michal Oravec ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Phenolic Compounds ◽  
Co2 Concentration ◽  
Environmental Stressors ◽  
Low Light ◽  
Mesophyll Cells ◽  
Stress Prevention ◽  
Tolerant Variety ◽  
Barley Leaves

Barley (Hordeum vulgare) accumulates phenolic compounds (PhCs), which play a key role in plant defense against environmental stressors as antioxidants or UV screening compounds. The influence of light and atmospheric CO2 concentration ([CO2]) on the accumulation and localization of PhCs in barley leaves was examined for two varieties with different tolerances to oxidative stress. PhC localization was visualized in vivo using fluorescence microscopy. Close relationships were found between fluorescence-determined localization of PhCs in barley leaves and PhC content estimated using liquid chromatography coupled with mass spectroscopy detection. Light intensity had the strongest effect on the accumulation of PhCs, but the total PhC content was similar at elevated [CO2], minimizing the differences between high and low light. PhCs localized preferentially near the surfaces of leaves, but under low light, an increasing allocation of PhCs in deeper mesophyll layers was observed. The PhC profile was significantly different between barley varieties. The relatively tolerant variety accumulated significantly more hydroxycinnamic acids, indicating that these PhCs may play a more prominent role in oxidative stress prevention. Our research presents novel evidence that [CO2] modulates the accumulation of PhCs in barley leaves. Mesophyll cells, rather than epidermal cells, were most responsive to environmental stimuli in terms of PhC accumulation.

scholarly journals HPLC study of phenolic compounds in Mirabilis jalapa raw material

Pharmacia ◽  
2020 ◽  
Vol 67 (3) ◽  
pp. 145-152
Author(s):  
Dhurgham Khalid Abed Sarray ◽  
Liliia M. Horiacha ◽  
Iryna O. Zhuravel ◽  
Andrii I. Fedosov
Keyword(s):  
Phenolic Compounds ◽  
Folk Medicine ◽  
Total Content ◽  
Hplc Method ◽  
Raw Material ◽  
Control Methods ◽  
Quantitative Content ◽  
Different Types ◽  
Mirabilis Jalapa ◽  
Hplc Study

Mirabilis jalapa is a popular decorative plant valued for its beautiful multicolored flowers. Folk medicine in various countries applies Mirabilis jalapa as anti-microbial, anti-inflammatory, diuretic, spasmolytic drug. Chemical composition of different types of Mirabilis jalapa has not yet been adequately studied which is an obstacle for its application in medicine. The qualitative composition and quantitative content of phenolic compounds were studied by the HPLC method. The performed experiment revealed presence of hydroxycinnamic acids, flavonoids, isoflavonoids and coumarins in tested herb. The content of phenolic compounds was the highest in Mirabilis jalapa flowers, counting as much as 2977.41 ± 59.55 µg/mg. Total content of phenolic compounds in Mirabilis jalapa herb was 304.25 ± 6.08 µg/mg, in fruits – 67.92 ± 1.36 µg/mg, and in roots – 12.44 ± 0.25 µg/mg. Quantitatively neochlorogenic acid dominated in flowers, chlorogenic acid in fruits, whereas Mirabilis jalapa herb mostly contained rutin and hyperoside. The obtained results will be useful in the development of quality control methods for Mirabilis jalapa herb and manufacture of drug preparations on its basis.

scholarly journals Effect ofCaesalpinia coriariaFruits and Soybean Oil on Finishing Lamb Performance and Meat Characteristics

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Nallely Sánchez ◽  
Germán David Mendoza ◽  
José Antonio Martínez ◽  
Pedro Abel Hernández ◽  
Luis Miguel Camacho Diaz ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Linoleic Acid ◽  
Phenolic Compounds ◽  
Soybean Oil ◽  
Condensed Tannins ◽  
Dry Matter ◽  
Control Diet ◽  
Feed Conversion ◽  
Dietary Treatments ◽  
Daily Gain

To evaluate phenolic compounds and whether the combination of a tanniferous fruit and soybean oil could improve the performance, meat characteristics, and fatty acid (FA) profile in lambs, an experiment was conducted over 40 days with twenty creole male lambs (23.71±3.46 kg). The lambs were allotted in a completely randomised design, with factorial arrangement 2 × 2, with the following dietary treatments: (1) control diet, (2) 2%Caesalpinia coriariaground fruit dry matter (DM), (3) 2% soybean oil DM, and (4) 2%Caesalpinia coriariafruit plus 2% soybean oil. The concentration of condensed tannins (CT) inCaesalpinia coriaceawas 21.71 g/kg DM. No interactions were detected (P>0.05) among soybean oil andCaesalpinia coriaria, and there were no differences in daily gain, intake, and feed conversion. Soybean oil reduced (P<0.05) DM digestibility (68.05 versus 59.56%). In fat from thelongissimus thoracis et lumborum(LTL) muscle, only linoleic acid presented differences (P<0.05) between treatments. The combination ofCaesalpinia coriaceafruit and soybean oil did not improve lamb performance at the included levels.

Condensed tannins as antioxidants that protect poplar against oxidative stress from drought and UV‐B

2021 ◽  
Author(s):  
Gerry Gourlay ◽  
Barbara Hawkins ◽  
Andreas Albert ◽  
Jörg‐Peter Schnitzler ◽  
C. Peter Constabel
Keyword(s):  
Oxidative Stress ◽  
Condensed Tannins

scholarly journals Alleviation of Multidrug Resistance by Flavonoid and Non-Flavonoid Compounds in Breast, Lung, Colorectal and Prostate Cancer

2020 ◽  
Vol 21 (2) ◽  
pp. 401 ◽  
Author(s):  
Teodora Costea ◽  
Oana Cezara Vlad ◽  
Luminita-Claudia Miclea ◽  
Constanta Ganea ◽  
János Szöllősi ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Multidrug Resistance ◽  
Phenolic Compounds ◽  
Epithelial To Mesenchymal Transition ◽  
Inflammatory Responses ◽  
Inhibition Of Proliferation ◽  
Mesenchymal Transition ◽  
Beneficial Effects ◽  
Different Types ◽  
Phenolcarboxylic Acids

The aim of the manuscript is to discuss the influence of plant polyphenols in overcoming multidrug resistance in four types of solid cancers (breast, colorectal, lung and prostate cancer). Effective treatment requires the use of multiple toxic chemotherapeutic drugs with different properties and targets. However, a major cause of cancer treatment failure and metastasis is the development of multidrug resistance. Potential mechanisms of multidrug resistance include increase of drug efflux, drug inactivation, detoxification mechanisms, modification of drug target, inhibition of cell death, involvement of cancer stem cells, dysregulation of miRNAs activity, epigenetic variations, imbalance of DNA damage/repair processes, tumor heterogeneity, tumor microenvironment, epithelial to mesenchymal transition and modulation of reactive oxygen species. Taking into consideration that synthetic multidrug resistance agents have failed to demonstrate significant survival benefits in patients with different types of cancer, recent research have focused on beneficial effects of natural compounds. Several phenolic compounds (flavones, phenolcarboxylic acids, ellagitannins, stilbens, lignans, curcumin, etc.) act as chemopreventive agents due to their antioxidant capacity, inhibition of proliferation, survival, angiogenesis, and metastasis, modulation of immune and inflammatory responses or inactivation of pro-carcinogens. Moreover, preclinical and clinical studies revealed that these compounds prevent multidrug resistance in cancer by modulating different pathways. Additional research is needed regarding the role of phenolic compounds in the prevention of multidrug resistance in different types of cancer.

scholarly journals Phenolic Compounds Reduce the Fat Content in Caenorhabditis elegans by Affecting Lipogenesis, Lipolysis, and Different Stress Responses

2020 ◽  
Vol 13 (11) ◽  
pp. 355
Author(s):  
Paula Aranaz ◽  
David Navarro-Herrera ◽  
María Zabala ◽  
Ana Romo-Hualde ◽  
Miguel López-Yoldi ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Fatty Acid ◽  
Phenolic Compounds ◽  
Fatty Acid Metabolism ◽  
Acid Metabolism ◽  
Lipid Mobilization ◽  
C Elegans ◽  
Unfolded Protein ◽  
Reducing Activity ◽  
Protein Response

Supplementation with bioactive compounds capable of regulating energy homeostasis is a promising strategy to manage obesity. Here, we have screened the ability of different phenolic compounds (myricetin, kaempferol, naringin, hesperidin, apigenin, luteolin, resveratrol, curcumin, and epicatechin) and phenolic acids (p-coumaric, ellagic, ferulic, gallic, and vanillic acids) regulating C. elegans fat accumulation. Resveratrol exhibited the strongest lipid-reducing activity, which was accompanied by the improvement of lifespan, oxidative stress, and aging, without affecting worm development. Whole-genome expression microarrays demonstrated that resveratrol affected fat mobilization, fatty acid metabolism, and unfolded protein response of the endoplasmic reticulum (UPRER), mimicking the response to calorie restriction. Apigenin induced the oxidative stress response and lipid mobilization, while vanillic acid affected the unfolded-protein response in ER. In summary, our data demonstrates that phenolic compounds exert a lipid-reducing activity in C. elegans through different biological processes and signaling pathways, including those related with lipid mobilization and fatty acid metabolism, oxidative stress, aging, and UPR-ER response. These findings open the door to the possibility of combining them in order to achieve complementary activity against obesity-related disorders.

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