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Featured researches published by Nastasia Pop.


Chemistry Central Journal | 2012

Carotenoids, total polyphenols and antioxidant activity of grapes ( Vitis vinifera ) cultivated in organic and conventional systems

Claudiu-Ioan Bunea; Nastasia Pop; Anca Babes; Cristian Matea; Francisc Vasile Dulf; Andrea Bunea

BackgroundOrganic agriculture involve plants which are cultivated without using synthetic pesticides, herbicides or fertilizers and promotes biodiversity, biological cycles and improve the product quality. The carotenoids, total polyphenols and the antioxidant activity from skins of some wine and table grapes cultivated in organic and conventional agriculture were studied.ResultsThe main carotenoids identified using high performance liquid chromatography were lutein and ß-carotene. Muscat Ottonel variety has the highest ß-carotene concentration 504.9 μg/kg for organic and 593.2 μg/kg for conventional grapes. For the organic farming, the total polyphenols content were in the range of 163.23 – 1341.37 mg GAE/kg fresh weight (FW) and 148.47 – 1231.38 mg GAE/kg FW for the conventional grapes. The highest ORAC values were obtained for blue-black variety Napoca in both farming system (43.5 ± 0.95 μmol TE/g organic; 40.4 ± 0.5 μmol TE/g conventional) and lowest for Aromat de Iaşi (16.8 ± 0.6 μmol TE/g organic; 14.7 ± 1.6 μmol TE/g conventional). Napoca variety showed also the highest antioxidant activity measured by DPPH method in both cultivated system.ConclusionNine grape varieties cultivated in organic and conventional systems were compared regarding the carotenoids, total polyphenols and antioxidant activity. The white grape varieties have a higher carotenoids content compared with the blue-black cultivars while the blue-black varieties contain higher TPC and exhibit higher antioxidant activity (except for Muscat Hamburg-ORAC). Vitis vinifera grape skins originating from wine or table grape varieties can be used as a potential source of natural antioxidants.


International Journal of Food Properties | 2016

Phenolic Substances, Flavor Compounds, and Textural Properties of Three Native Romanian Wine Grape Varieties

Delia Elena Urcan; Mihai Lucian Lung; Simone Giacosa; Fabrizio Torchio; Alessandra Ferrandino; Simone Vincenzi; Susana Río Segade; Nastasia Pop; Luca Rolle

In this work, the chemical compositions and texture characteristics of three native Romanian wine grape varieties (Fetească regală, Fetească alba, and Fetească neagră) were studied. We assessed the distinct characteristics directly linked to their phenolic compositions, volatile profiles, and mechanical properties and compared these characteristics with those of Pinot noir grapes. The effect of the growing zone was also evaluated. Various spectrophotometric indices directly related to the phenolic compositions of berry skins and seeds were determined. The detailed phenolic compositions (anthocyanins, hydroxycinnamoyl tartaric acids, and stilbenes) of the skins were determined using high-performance liquid chromatography methods. Free and bound volatile compounds in the berries were quantified by gas chromatography/mass spectrometry. The textural properties of the skins and seeds were measured by instrumental texture analysis. The results showed high diversity among the varieties and zones that affected the enological potential. Among the white varieties, Fetească albă grapes could be less susceptible to browning as a consequence of their lower trans-caffeoyltartaric acid concentration, whereas Fetească regală grapes from Cluj had the highest concentrations of total free and bound volatile compounds, particularly terpenes and norisoprenoids. Among the red varieties, Fetească neagră was identified as a promising variety to be exploited in the future for its particular phenolic characteristics, particularly those grapes grown in Mica. Nevertheless, Fetească neagră grapes grown in Cluj had the highest total glycosidically bound terpene concentrations. Finally, differences in the mechanical and/or acoustic properties of the skins and seeds could strongly influence the kinetics and completeness of phenolic compound extractions.


Food Chemistry | 2017

‘Fortified’ wines volatile composition: Effect of different postharvest dehydration conditions of wine grapes cv. Malvasia moscata (Vitis vinifera L.)

Delia Elena Urcan; Simone Giacosa; Fabrizio Torchio; Susana Río Segade; Stefano Raimondi; Marta Bertolino; Vincenzo Gerbi; Nastasia Pop; Luca Rolle

The impact of postharvest dehydration on the volatile composition of Malvasia moscata grapes and fortified wines produced from them was assessed. The ripeness effect of fresh grapes on volatile compounds of dehydrated grapes was evaluated for the first time in this study. Fresh grape berries were densimetrically sorted, and more represented density classes were selected. Dehydration of riper berries (20.5 °Brix) led to volatile profiles richer in terpenes, particularly linalool and geraniol. The effect of dehydration rate on the volatile composition of dehydrated grapes and fortified wines was also evaluated. Fast dehydration grapes were richer in total free terpenes, and the resulting wines contained greater amounts of volatile compounds. The predominant compounds were free esters, but linalool, rose oxide, citronellol and geraniol can also contribute to wine aroma, particularly for fast dehydration. β-Damascenone can be an active odorant, although its contribution was greater in wines made from slow dehydrated grapes.


Oxidative Medicine and Cellular Longevity | 2018

Polyphenolic Compounds, Antioxidant, and Cardioprotective Effects of Pomace Extracts from Fetească Neagră Cultivar

Ştefania Silvia Balea; Alina Elena Pârvu; Nastasia Pop; Fernando Zamora Marín; Marcel Pârvu

Grape pomace is a potential source of natural antioxidant agents. Phenolic compounds and antioxidant and cardioprotective properties of fresh and fermented pomace extracts obtained from Vitis vinifera L. red variety Fetească neagră grown in Romania in 2015 were investigated. Grape pomace extracts total phenolic index, total tannins, total anthocyanins, proanthocyanidins, flavan-3-ol monomers, stilbenes, and DPPH free radical scavenger were measured. The effect of a seven-day pretreatment with grape pomace extracts on the isoprenaline-induced infarct-like lesion in rats was assessed by ECG monitoring, serum levels of creatine kinase, aspartate transaminase, and alanine transaminase. Total serum oxidative status, total antioxidant response, oxidative stress index, malondialdehyde, total thiols, and nitric oxide have been also assessed. Higher phenolic content and antioxidant activity were found in fermented pomace extracts when compared to fresh pomace extracts. Pretreatment with grape pomace extracts significantly improved cardiac and oxidative stress parameters. In conclusion, Fetească neagră pomace extracts had a good in vitro antioxidant activity due to an important phenolic content. In vivo, the extracts had cardioprotective effects against isoprenaline-induced infarct-like lesion by reducing oxidative stress, fresh pomace extracts having a better effect.


Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture | 2012

Researches Regarding the Influence of Special Green Works on Evolution of Ripening in Four Varieties of Grapes for Wine from Vineyard Târnave

Florentina Ciobanu; Nastasia Pop; Maria Iliescu; Anca Babeș; Claudiu Bunea; Anca Eva Ardelean; Mihai Lucian Lung; Andreea Flavia Tripon

This paper was done in order to establish the influence of special green works (grapesthinning, partial deleafing and grapes bagging) on ripening evolution at the varieties: ‘MuscatOttonel’, ‘Neuburger’, ‘Traminer roz’ and ‘Sauvignon blanc’, in ecoclimatic conditions of TA¢rnaveVineyard. The grapes ripening was observed starting with 19th August, after dough ripening. Severaldeterminations were conducted regarding sugars accumulations, acidity and the weigh of 100 berries,at a one week interval (the 19th of August, 29th of August, 5th of September and 12th of September).Out of the methods known for sugars determinations within the must (refractometric method,densymetric method and chemical method) it was used the refractometric one. The principle of themethod is based on the determination of the dry matter percent within the must by using therefratometer. The content of sugars is then calculated with the aid of the corresponding tables. Theresult is expressed in g/l (sugar grams/must litres). Titration in the presence on phenolphthalein wasused to determine the total acidity within the must. The acidity is expressed in g/l H2SO4. Variant 2(deleafed) of ‘Traminer roz’ accumulated the highest sugars content. The acidity decreases with thesugars concentration. An important decrease is observed in the first period of maturation (19th ofAugust- 5th of September), excepting the ‘Neuburger’ variety, which had an acidity decrease duringthe 5th- 12th of September period.


Food Chemistry | 2016

Influence of different withering conditions on phenolic composition of Avanà, Chatus and Nebbiolo grapes for the production of 'Reinforced' wines.

Fabrizio Torchio; Delia Elena Urcan; Lin Lin; Vincenzo Gerbi; Simone Giacosa; Susana Río Segade; Nastasia Pop; Milena Lambri; Luca Rolle


Chemistry Central Journal | 2015

Vertical distribution and analysis of micro-, macroelements and heavy metals in the system soil-grapevine-wine in vineyard from North-West Romania.

Florin-Dumitru Bora; Claudiu-Ioan Bunea; Teodor Rusu; Nastasia Pop


Notulae Botanicae Horti Agrobotanici Cluj-napoca | 2011

The analysis of different factors affecting the red wines antioxidant content.

Anamaria Hosu; Claudia Cimpoiu; Nastasia Pop; Vasile Miclaus; Sorana D. Bolboacă; Lorentz Jäntschi


Notulae Botanicae Horti Agrobotanici Cluj-napoca | 2010

Influence of intermittent heating during maceration on the antioxidant capacity of some grape seeds and skins.

Anamaria Hosu; Claudia Cimpoiu; Vasile Miclaus; Grigore Damian; Irina Tarsiche; Nastasia Pop


Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Veterinary Medicine | 2008

Study on the effects of grape seed extract in Ehrlich ascitic carcinoma

Adriana Muresan; Soimita Suciu; Simona Clichici; Doina Daicoviciu; Nastasia Pop; Ion Dan Postescu

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Claudiu Bunea

University of Agricultural Sciences

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Anca Babes

University of Agricultural Sciences

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Florentina Ciobanu

University of Agricultural Sciences

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Daniela Hodor

University of Agricultural Sciences

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Florin Dumitru Bora

University of Agricultural Sciences

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Mihai Lucian Lung

University of Agricultural Sciences

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Tiberia Ioana Pop

University of Agricultural Sciences

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Anca Babeș

University of Agricultural Sciences

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Claudiu-Ioan Bunea

University of Agricultural Sciences

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Anca Babeş

University of Agricultural Sciences

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