Violeta ivanova (25 resultados)

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Taschenbuch. Condición: Neu. Druck auf Anfrage Neuware - Printed after ordering - Research Paper (postgraduate) from the year 2014 in the subject Food Technology, grade: 10, , language: English, abstract: The purpose of this study was to introduce a new source of antioxidants obtained from grape pomace as well as aronia and blueberry and engages them in preparation of a new yoghurt product in order to be last - longer and more beneficial for human health than the traditional one. Totally, grape pomaces from 4 varieties (Zupjanka, Prokupec, Kadinal and Vranec), as well as blueberry and aronia, were used. For the extraction of polyphenolics, liquid-liquid extraction with ethanol/water/acetic acid was used, followed by roto-evaporation, in order to concentrate the extracts and then to introduce them into the milk. The total phenolic content of the extracts was determined by the Folin-Ciocalteu method and the total anthocyanins were analyzed by dilution of the samples with ethanol/water/HCl, obtaining three different volumes of extracts (10, 50 and 100 mL) of each sample (grape pomaces, blueberry and aronia), obtaining 36 extracts in total. The three different concentrates of each sample (18 in total) were applied on milk together with the lactic bacteria in order to study the influence of polyphenolics during the fermentation; as well as, 18 other extracts applied on milk after the fermentation (into the obtained yoghurt). The pH value of the newly generated yoghurts was analyzed during the fermentation and storage.The aronia sample presented highest phenolic content (431 mg/L), while Zupjanka had the lowest content of polyphenols (67.9 mg/L). The grape pomace presenting best results was Prokupec (246 mg/L). All yoghurt samples containing polyphenolics applied before the fermentation, presented higher pH value compared to the control and samples with polyphenolics applied after fermentation. Furthermore, all yoghurt samples containing phenolics extract with highest concentration, showed best results, presenting stable pH value. Sensory analysis was performed on the different yoghurt samples, concluding that the new products have creamy texture, good taste, without unpleasant smell or bitterness. The colour of some samples turned into red-violet, excluding the yoghurt with extracts from: Zupjanka and Kardinal. By microbiological analysis the presence of pathogen and other harmful bacterias was proved to be negative, showing that this yoghurt is a main basis for manufacturing of a more beneficial dairy product that could be soon available on the market.…

Taschenbuch. Condición: Neu. Wine industry logistics in Republic of Macedonia | Wine logistics | Violeta Ivanova Petropulos (u. a.) | Taschenbuch | 56 S. | Englisch | 2013 | LAP LAMBERT Academic Publishing | EAN 9783659494888 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.…

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Taschenbuch. Condición: Neu. Phenolic Compounds in Macedonian Grapes and Wines | Violeta Ivanova | Taschenbuch | 224 S. | Englisch | 2013 | LAP LAMBERT Academic Publishing | EAN 9783659415722 | Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu. …

Taschenbuch. Condición: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - around the oval' is about memories, progress, pain, home, and hope. What is in it is real and as tangible as a hitched breath. In and out, moving forward.

Taschenbuch. Condición: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Research Paper (postgraduate) from the year 2014 in the subject Food Technology, grade: 10, , language: English, abstract: The purpose of this study was to introduce a new source of antioxidants obtained from grape pomace as well as aronia and blueberry and engages them in preparation of a new yoghurt product in order to be last - longer and more beneficial for human health than the traditional one. Totally, grape pomaces from 4 varieties (Zupjanka, Prokupec, Kadinal and Vranec), as well as blueberry and aronia, were used. For the extraction of polyphenolics, liquid-liquid extraction with ethanol/water/acetic acid was used, followed by roto-evaporation, in order to concentrate the extracts and then to introduce them into the milk. The total phenolic content of the extracts was determined by the Folin-Ciocalteu method and the total anthocyanins were analyzed by dilution of the samples with ethanol/water/HCl, obtaining three different volumes of extracts (10, 50 and 100 mL) of each sample (grape pomaces, blueberry and aronia), obtaining 36 extracts in total. The three different concentrates of each sample (18 in total) were applied on milk together with the lactic bacteria in order to study the influence of polyphenolics during the fermentation; as well as, 18 other extracts applied on milk after the fermentation (into the obtained yoghurt). The pH value of the newly generated yoghurts was analyzed during the fermentation and storage.The aronia sample presented highest phenolic content (431 mg/L), while Zupjanka had the lowest content of polyphenols (67.9 mg/L). The grape pomace presenting best results was Prokupec (246 mg/L). All yoghurt samples containing polyphenolics applied before the fermentation, presented higher pH value compared to the control and samples with polyphenolics applied after fermentation. Furthermore, all yoghurt samples containing phenolics extract with highest concentration, showed best results, presenting stable pH value. Sensory analysis was performed on the different yoghurt samples, concluding that the new products have creamy texture, good taste, without unpleasant smell or bitterness. The colour of some samples turned into red-violet, excluding the yoghurt with extracts from: Zupjanka and Kardinal. By microbiological analysis the presence of pathogen and other harmful bacterias was proved to be negative, showing that this yoghurt is a main basis for manufacturing of a more beneficial dairy product that could be soon available on the market. 60 pp. Englisch.…

Taschenbuch. Condición: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The theoretical characteristics of logistics and logistics systems are numerous, with specific characteristics, different implications and missions. Logistics activities in the wine industry are very important. Macedonia is a large exporter of wine. In terms of export value of agricultural products in Macedonia, wine is at the first place in terms of exports of alcoholic beverages, and at the second place immediately after the tobacco. The winemaking in Macedonia is continuously increasing, especially the last ten years. Besides the increased production, a special attention is paid to the improvement of the quality of produced wine, as well as improving conditions for growing vines, thereby obtaining quality grapes. Several factors affect this positive trend and one of them is educated staffs of vine growers and oenologists which are involved in the process. Thus, quinary logistics takes an important place in the development of vine and wine production. 56 pp. Englisch.…

Condición: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Ivanova Petropulos VioletaDr. Violeta Ivanova Petropulos obtained her PhD degree in Wine Chemistry. Dr. Drasko Atanasoski obtained his PhD degree in Customs and Logistics. Currently, both authors are working as Assistant Professors a. …

Taschenbuch. Condición: Neu. around the oval | Violeta Ivanova | Taschenbuch | Englisch | 2024 | BookLeaf Publishing | EAN 9789357446341 | Verantwortliche Person für die EU: Libri GmbH, Europaallee 1, 36244 Bad Hersfeld, gpsr[at]libri[dot]de | Anbieter: preigu Print on Demand.

Condición: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Andonovic ZoranaZorana Andonovic was born in 1997, in Kumanovo, R. Macedonia. Currently, she is a student at fourth year in secondary school Yahya Kemal College, Skopje, R. Macedonia. Dr. Violeta Ivanova-Petropulos is working as Assi. …

Taschenbuch. Condición: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The theoretical characteristics of logistics and logistics systems are numerous, with specific characteristics, different implications and missions. Logistics activities in the wine industry are very important. Macedonia is a large exporter of wine. In terms of export value of agricultural products in Macedonia, wine is at the first place in terms of exports of alcoholic beverages, and at the second place immediately after the tobacco. The winemaking in Macedonia is continuously increasing, especially the last ten years. Besides the increased production, a special attention is paid to the improvement of the quality of produced wine, as well as improving conditions for growing vines, thereby obtaining quality grapes. Several factors affect this positive trend and one of them is educated staffs of vine growers and oenologists which are involved in the process. Thus, quinary logistics takes an important place in the development of vine and wine production.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 56 pp. Englisch.…

Taschenbuch. Condición: Neu. Application of Grape Pomace as a Natural Food Preservative and Source of Biofuel | Violeta Ivanova-Petropulos (u. a.) | Taschenbuch | 60 S. | Englisch | 2014 | GRIN Verlag | EAN 9783656702283 | Verantwortliche Person für die EU: GRIN Publishing GmbH, Waltherstr. 23, 80337 München, info[at]grin[dot]com | Anbieter: preigu Print on Demand. …

Taschenbuch. Condición: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This study evaluates the phenolic content of red (Vranec and Merlo) and white (Smederevka and Chardonnay) wines produced under different vinifications and grapes at different ripening phases. HPLC-DAD-MS, MALDI-TOF-MS and spectrophotometry were used for analysis of phenolics (anthocyanins, hydroxycinnamic acids and proanthocyanidins) in the samples, observing that their content varied greatly with the winemaking conditions and ripening. The effect of pH of the sample and mobile phase on anthocyanin analysis was explored. Maximum flavylium response was obtained in the samples acidified to pH 1.2 and elution using 1 % (V/V) formic acid in the HPLC mobile phase, allowing proper separation and detection of anthocyanins and phenolic acids as well as lower current in the MS source. Several MALDI matrices were tested: -cyano-4-hydroxycinnamic acid (CHCA), sinapic acid (SA), 2,5- hydroxybenzoic acid (2,5-DHB) and C70. 2,5-DHB was superior with respect to all the matrices tested. For the first time, fullerene was introduced as a new possible matrix for MALDI-TOF-MS analysis of anthocyanins in wines and grapes. 224 pp. Englisch. …

Condición: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Ivanova VioletaDr. Violeta Ivanova was born in 1978 in Macedonia. She has obtained her PhD degree in Wine Chemistry at Ss. Cyril and Methodius University , Skopje, in 2009. Currently she is working as an Assistant Professor of Senso. …

Taschenbuch. Condición: Neu. This item is printed on demand - Print on Demand Titel. Neuware -This study evaluates the phenolic content of red (Vranec and Merlo) and white (Smederevka and Chardonnay) wines produced under different vinifications and grapes at different ripening phases. HPLC-DAD-MS, MALDI-TOF-MS and spectrophotometry were used for analysis of phenolics (anthocyanins, hydroxycinnamic acids and proanthocyanidins) in the samples, observing that their content varied greatly with the winemaking conditions and ripening. The effect of pH of the sample and mobile phase on anthocyanin analysis was explored. Maximum flavylium response was obtained in the samples acidified to pH 1.2 and elution using 1 % (V/V) formic acid in the HPLC mobile phase, allowing proper separation and detection of anthocyanins and phenolic acids as well as lower current in the MS source. Several MALDI matrices were tested: ¿-cyano-4-hydroxycinnamic acid (CHCA), sinapic acid (SA), 2,5- hydroxybenzoic acid (2,5-DHB) and C70. 2,5-DHB was superior with respect to all the matrices tested. For the first time, fullerene was introduced as a new possible matrix for MALDI-TOF-MS analysis of anthocyanins in wines and grapes.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 224 pp. Englisch. …

Taschenbuch. Condición: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - This study evaluates the phenolic content of red (Vranec and Merlo) and white (Smederevka and Chardonnay) wines produced under different vinifications and grapes at different ripening phases. HPLC-DAD-MS, MALDI-TOF-MS and spectrophotometry were used for analysis of phenolics (anthocyanins, hydroxycinnamic acids and proanthocyanidins) in the samples, observing that their content varied greatly with the winemaking conditions and ripening. The effect of pH of the sample and mobile phase on anthocyanin analysis was explored. Maximum flavylium response was obtained in the samples acidified to pH 1.2 and elution using 1 % (V/V) formic acid in the HPLC mobile phase, allowing proper separation and detection of anthocyanins and phenolic acids as well as lower current in the MS source. Several MALDI matrices were tested: -cyano-4-hydroxycinnamic acid (CHCA), sinapic acid (SA), 2,5- hydroxybenzoic acid (2,5-DHB) and C70. 2,5-DHB was superior with respect to all the matrices tested. For the first time, fullerene was introduced as a new possible matrix for MALDI-TOF-MS analysis of anthocyanins in wines and grapes. …