The contents of total polyphenolic compounds and trans-resveratrol in white Riesling originated in the Czech Republic

Wine is a significant source of antioxidants in human nutrition. Every glass of wine contains approximately 200 different phenolic compounds, several of which have been noted as antioxidants because they have been shown to slow down the potentially damaging cell oxidation process. In white Riesling from different wine-growing sub-regions, kinds of wine, years of harvest and vintners, the content of total polyphenols (TP) was determined using spectrophotometric method, and that of trans-resveratrol (R) by HPLC method. The TP content was presented as gallic acid equivalent per litre of wine, and the content of R as trans-resveratrol per litre of wine. TP values in the wine-growing region of Bohemia ranged from 223.0 to 532.7 mg/l (average content 330.3 mg/l), in the wine-growing region of Moravia from 175.0 to 465.0 mg/l (average content 271.7 mg/l), while R values in the wine-growing region of Bohemia ranged from < 0.033 to 0.421 mg/l (average content 0.117 mg/l), in the wine-growing region of Moravia from < 0.033 to 0.875 mg/l (average content 0.123 mg/l). The highest average TP content (370.1 mg/l) and R content (0.262 mg/l) were found in the sub-region Roudnická (the wine-growing region of Bohemia). The harvest year of 1994 was evaluated as that providing the highest average levels of TP (386.5 mg/l) and R (0.201 mg/l). The kind of wine with the highest average TP was the kind of “selected grapes” (327.2 mg/l), while the highest average R content was found in the late harvest wine (0.141 mg/l). The R and TP contents were not significantly affected by vintage, wine-growing sub-region or the kind of wine. The statistically significant correlation between TP and R content was not demonstrated (5.73%).    

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Monitoring of the PAL Enzymatic Activity and Polyphenolic Compounds in Leaves and Fruits of Two Myrtle Cultivars during Maturation

Agriculture ◽

10.3390/agriculture10090389 ◽

2020 ◽

Vol 10 (9) ◽

pp. 389

Author(s):

Silvia Medda ◽

Leonarda Dessena ◽

Maurizio Mulas

Keyword(s):

Phenolic Compounds ◽

Phenylalanine Ammonia Lyase ◽

Raw Materials ◽

Phenylpropanoid Pathway ◽

Polyphenolic Compounds ◽

Antioxidant Compounds ◽

Total Polyphenols ◽

Spectrophotometric Methods ◽

Pal Activity ◽

Potential Use

The leaves and berries of myrtle (Myrtus communis L.) are rich in phenolic compounds, such as phenolic acids, flavonoids, and flavanols. The richness of these antioxidant compounds allows the potential use of myrtle biomasses as raw materials for medicinal and functional food products. Most of the phenolic compounds originate from the phenylpropanoid pathway, where phenylalanine ammonia lyase (PAL) enzyme activates the first step. The objective of this research is to study the activity of PAL as related to accumulation in the myrtle fruits and leaves of some phenolic compounds in the period between blossom and full berry ripening. With this aim, we compared two model genotypes with different fruit coloration. In leaves and berries of two cultivars, ‘Giovanna’ with pigmented berries and ‘Grazia’ with white berries, the PAL activity and content of polyphenols, anthocyanins, flavonoids, and tannins were determined with spectrophotometric methods. PAL activity was quite constant in leaves and variable in berries: Greater in berries of ‘Giovanna’ than in those of ‘Grazia’ cultivar, and increasing from berry color-break to full ripening. In berries, a positive correlation between PAL and flavonoids (r = 0.44), and between PAL and anthocyanins (r = 0.69), as well as a negative correlation between PAL and total polyphenols (r = −0.471), were found.

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Determination of caftaric acid in tincture and rose water obtained from Rosae damascenae flores

Ovidius University Annals of Chemistry ◽

10.1515/auoc-2015-0003 ◽

2015 ◽

Vol 26 (1) ◽

pp. 12-19 ◽

Cited By ~ 1

Author(s):

Antoanela Popescu ◽

Nicoleta Matei ◽

Florentina Roncea ◽

Horatiu Miresan ◽

Georgeta Pavalache

Keyword(s):

Phenolic Compounds ◽

Phosphoric Acid ◽

Flow Rate ◽

Gradient Elution ◽

Hplc Method ◽

Polyphenolic Compounds ◽

Injection Volume ◽

Caftaric Acid

Abstract Polyphenolic compounds were determined from a pharmaceutical (tincture) and a cosmetic preparation (rose water), both obtained from the Rosae damascenae flores. Separation of the phenolic compounds was done by a HPLC method, using a Zorbax XDB or equivalent column C18, 250 mm x 4,6 mm; 5 μm. A gradient elution was performed with phosphoric acid and acetonitrile eluted under gradient conditions. The flow rate was 1.5 mL/min and the injection volume was 20 μL. HPLC method for determination of caftaric acid presented in this paper, has been validated. The results were statistically analyzed with SPSS 10 software.

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Varietal differentiation of white wines on the basis of phenolic compounds profile

Czech Journal of Food Sciences ◽

10.17221/270/2012-cjfs ◽

2013 ◽

Vol 31 (No. 2) ◽

pp. 172-179 ◽

Cited By ~ 9

Author(s):

L. Lampíř

Keyword(s):

Phenolic Compounds ◽

Protocatechuic Acid ◽

Syringic Acid ◽

Hplc Method ◽

Hydroxycinnamic Acids ◽

Analysis Method ◽

White Wines ◽

The Czech Republic ◽

Grapevine Variety ◽

Hydroxybenzoic Acids

The authenticity of grapevine varieties is a very important topic in the Czech Republic, where varietal wines is very important for wine drinkers. The wines from 7 grapevine varieties were investigated. Sixteen phenolic compounds belonging among hydroxybenzoic and hydroxycinnamic acids, stilbenes, and flavan-3-ols were analysed by HPLC method. The aim of this study was to find markers of varietal origin of wines among the phenolic compounds studied. The analytical parameters obtained were evaluated for this purpose by CVA (canonical varietal analysis) method. It proved to be successful in detecting the following grapevine variety authenticity markers: hydroxycinnamic acids (i.e. p-coutaric acid and caftaric acid), hydroxybenzoic acids (protocatechuic acid and syringic acid), and flavan-3-ols <br />((–)-epicatechin and (+)-catechin).  

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Authentication of Riesling wines from the Czech Republic on the basis of the non-flavonoid phenolic compounds

Czech Journal of Food Sciences ◽

10.17221/40/2013-cjfs ◽

2013 ◽

Vol 31 (No. 5) ◽

pp. 474-482 ◽

Cited By ~ 15

Author(s):

P. Pavloušek ◽

M. Kumšta

Keyword(s):

Czech Republic ◽

Phenolic Compounds ◽

Protocatechuic Acid ◽

Geographical Origin ◽

Hplc Method ◽

Canonical Discriminant Analysis ◽

Multivariate Statistical ◽

White Wines ◽

The Czech Republic ◽

Hydroxybenzoic Acids

Eighteen non-flavonoid phenolic compounds comprising hydroxybenzoic acids, hydroxycinnamates, and stilbenes were analysed in 43 monovarietal wines originated from five wine-growing regions in the Czech Republic. The non-flavonoid phenolic compounds in wine were analysed by a HPLC method. The methods of multivariate statistical analysis were used for the wine discrimination on the basis of the geographical origin. The canonical discriminant analysis (CDA) proved the possibility to discriminate wines according to their provenance on the basis of the following parameters: protocatechuic acid, p-hydroxybenzoic acid, caftaric acid, p-coutaric acid, trans-resveratrol, and cis-resveratrol. On the basis of statistical analyses, 95.4% of the wine samples were correctly classified. The results therefore indicate that the non-flavonoid phenolic compounds can be used to discriminate the geographical origin of white wines.

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Influence of terroir on the concentration of selected stilbenes in wines of the cv. Riesling in the Czech Republic

Horticultural Science ◽

10.17221/126/2010-hortsci ◽

2012 ◽

Vol 39 (No. 1) ◽

pp. 38-46 ◽

Cited By ~ 2

Author(s):

M. Kumšta ◽

P. Pavloušek ◽

J. Kupsa

Keyword(s):

Czech Republic ◽

Phenolic Compounds ◽

Geographical Origin ◽

Hplc Method ◽

The Czech Republic ◽

The Subject ◽

The Relationship ◽

Mean Concentration

The relationship between the terroir and the quality of grapes and/or wines is used in wine authenticity determination based on geographical origin. The phenolic compounds in grapes and wines are probably related to the terroir. The subject of the study was the analysis of 43 wines of the cv. Riesling from six wine-growing sub-regions, 16 different localities and four vintages to determine the content of trans-resveratrol, trans-piceid, cis-resveratrol and cis-piceid. The analyses were performed using an HPLC method. A relationship was observed between trans-resveratrol concentration in wines and wine-growing locality. The concentration of trans-resveratrol ranged from 0.04 to 0.82 mg/l with mean concentration of 0.28 mg/l. The highest concentrations of trans-resveratrol were found in wines from the localities Podmolí (0.66 mg/l), Hostěradice (0.64 mg/l and 0.82 mg/l), Mělník (0.59 mg/l) and Litoměřice (0.57 mg/l). Differences were also found in the relationship between trans-resveratrol and wine-growing sub-regions. Relationships between trans-piceid, cis-resveratrol or cis-piceid concentration and wine terroir were not demonstrated. The results of this study demonstrated the capability to differentiate the wine terroir using the trans-resveratrol concentrations.

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The Qualitative And Quantitative Determination Of The Phenolic Compounds In Polygonum Convolvulus L. Species, Polygonaceae Family

Acta Medica Marisiensis ◽

10.2478/amma-2013-0038 ◽

2013 ◽

Vol 59 (3) ◽

pp. 162-164 ◽

Cited By ~ 1

Author(s):

O T Olaru ◽

Adriana Iuliana Anghel ◽

Viorica Istudor ◽

Iulia Ioana Olaru

Keyword(s):

Phenolic Compounds ◽

Quantitative Determination ◽

Polyphenolic Compounds ◽

Phytochemical Screening ◽

Total Polyphenols ◽

Qualitative And Quantitative ◽

Polygonum Convolvulus ◽

Subalpine Zone ◽

Layer Chromatography

Abstract Introduction: Polygonum convolvulus L. (black bindweed), syn. Fallopia convolvulus (L.) Á. Löve, Polygonaceae family is a plant from the spontaneous flora, spread from the plain zone up to the subalpine zone. The objectives of our researches are the qualitative and quantitative determination of polyphenolic compounds from Polygoni convolvuli herba and the choice of the adequate solvent for obtaining an active pharmacological extract. Method: The qualitative exam consisted of phytochemical screening and thin layer chromatography. The quantitative determination of the total polyphenols was made through the Folin-Ciocâlteu method. Results: The flavonoids, the anthocyanins, the tannins and the phenol carboxylic acids (phytochemical screening) were emphasized and the following compounds were identified: rutin, hyperoside, isoquercitroside, quercetin, myricetin, kaempferol and caffeic acid. Conclusions: In order to establish the technological lab process for obtaining an active pharmacological extract standardized in total polyphenols the adequate solvent is ethanol 50% (v/v).

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Cardiovascular Modulating Effects of Magnolol and Honokiol, Two Polyphenolic Compounds from Traditional Chinese Medicine-Magnolia Officinalis

Current Drug Targets ◽

10.2174/1389450120666191024175727 ◽

2020 ◽

Vol 21 (6) ◽

pp. 559-572 ◽

Cited By ~ 1

Author(s):

Yuan Yuan ◽

Xiaocui Zhou ◽

Yuanyuan Wang ◽

Yan Wang ◽

Xiangyan Teng ◽

...

Keyword(s):

Phenolic Compounds ◽

Chinese Medicine ◽

Traditional Chinese Medicine ◽

Cardiac Hypertrophy ◽

Therapeutic Potential ◽

Current Data ◽

Polyphenolic Compounds ◽

Comprehensive Review ◽

Magnolia Officinalis

Honokiol and its isomer magnolol are poly-phenolic compounds isolated from the Magnolia officinalis that exert cardiovascular modulating effects via a variety of mechanisms. They are used as blood-quickening and stasis-dispelling agents in Traditional Chinese Medicine and confirmed to have therapeutic potential in atherosclerosis, thrombosis, hypertension, and cardiac hypertrophy. This comprehensive review summarizes the current data regarding the cardioprotective mechanisms of those compounds and identifies areas for further research.

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The Effect of Ripening Stages on the Accumulation of Carotenoids, Polyphenols and Vitamin C in Rosehip Species/Cultivars

Applied Sciences ◽

10.3390/app11156761 ◽

2021 ◽

Vol 11 (15) ◽

pp. 6761

Author(s):

Brigita Medveckienė ◽

Jurgita Kulaitienė ◽

Dovilė Levickienė ◽

Ewelina Hallmann

Keyword(s):

High Performance Liquid Chromatography ◽

Vitamin C ◽

High Performance ◽

Hplc Method ◽

Total Carotenoid ◽

Ripening Stage ◽

Rosa Rugosa ◽

Total Polyphenols ◽

Rosa Canina ◽

Ripening Stages

Our research was aimed at assessing the effect of accumulation of carotenoids, polyphenols, vitamin C and ripening stage in the rosehip fruits of two species—Rosa canina, Rosa rugosa and two cultivar—Rosa rugosa ‘Rubra’ and Rosa rugosa ‘Alba’. The amounts of carotenoids, polyphenols and vitamin C were determined using the high-performance liquid chromatography (HPLC) method. The obtained results showed that the significantly highest amount (107.15 mg 100 g−1) of total carotenoid was determined in the fruits of Rosa canina at ripening Stage V. While results indicated that significant amount of total polyphenols were established at Stages I and II in the Rosa Rugosa ‘Alba’ and Rosa rugosa ‘Rubra’ cultivars (110.34 mg 100 g−1, 107.88 mg 100 g−1 and 103.20 mg 100 g−1 103.39 mg 100 g−1). At ripening Stage I, in the fruits of Rosa rugosa the greatest increases were established in the contents of vitamin C (3036.08 mg 100 g−1).

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The Impact of Climate Change on the Sugar Content of Grapes and the Sustainability of their Production in the Czech Republic

Sustainability ◽

10.3390/su13010222 ◽

2020 ◽

Vol 13 (1) ◽

pp. 222

Author(s):

Miroslava Navrátilová ◽

Markéta Beranová ◽

Lucie Severová ◽

Karel Šrédl ◽

Roman Svoboda ◽

...

Keyword(s):

Climate Change ◽

Czech Republic ◽

Sugar Content ◽

Growing Season ◽

Vegetation Period ◽

The Czech Republic ◽

Impact Of Climate Change ◽

Secondary Sources ◽

The Impact ◽

Growing Region

The aim of the presented article is to evaluate the impact of climate change on the sugar content of grapes in the Czech Republic during the period 2000–2019 through selected indicators on the basis of available secondary sources. Attention is focused on the developments in both the main wine-growing regions of Moravia and Bohemia. In the field of viticulture and wine-growing, the sugar content of grapes, as a basic parameter for the classification of wines, plays an important role. In the Czech Republic, the average sugar content of grapes has had a constantly growing trend. This trend is evident both in the wine-growing region of Bohemia and in the wine-growing region of Moravia. The impact of climate change, especially the gradual increase of average temperatures in the growing season, cannot be overlooked. It greatly affects, among other things, the sugar content of grapes. Calculations according to the Huglin Index and the Winkler Index were used to determine the relationship between climate and sugar content. These indexes summarize the course of temperatures during the entire vegetation period into a single numerical value. The results show that both indexes describe the effect of air temperature on sugar content in both wine regions of the Czech Republic in a statistically significant way. The Huglin Index shows a higher correlation rate. The Winkler Index proved to be less suitable for both areas. Alternatively, the Winkler Index calculated for a shorter growing season was tested, which showed a higher degree of correlation with sugar content, approaching the significance of the Huglin Index.

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