scholarly journals Conventional and Organic Honeys as a Source of Water- and Ethanol Soluble Molecules with Nutritional and Antioxidant Characteristics

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3746
Author(s):  
Magdalena Polak-Śliwińska ◽  
Małgorzata Tańska
Keyword(s):  
Antioxidant Activity ◽  
Immune System ◽  
Vitamin C ◽  
Geographical Area ◽  
Production Method ◽  
Climatic Conditions ◽  
Organic Production ◽  
Organoleptic Characteristics ◽  
Nutritional Characteristics ◽  
The Impact

The benefits of natural honeybee products (e.g., honey, royal jelly, beeswax, propolis, beevenom and pollen) to the immune system are remarkable, and many of them are involved in the induction of antibody production, maturation of immune cells and stimulation of the immune system. The type of plants in the geographical area, climatic conditions and production method have a significantly influence on the nutritional quality of honey. However, this variability can influence consumer liking by the sensory attributes of the product. The aim of this work was to compare the most popular honeys from Poland in terms of nutritional value, organoleptic properties and antioxidant activity. In the study, five varieties of honey (honeydew, forest, buckwheat, linden and dandelion) from conventional and organic production methods were tested. The nutritional characteristics of honey samples included acidity, content of water, sugars, vitamin C, HMF and phenolics (total and flavonoids), while honey color, taste, aroma and consistency were investigated in the organoleptic characteristics. The antioxidant activity was determined in water- and ethanol-soluble honey extracts using DPPH and ORAC tests. The results showed that organoleptic and nutritional characteristics of popular Polish honeys differ significantly in relation to plant source and production method. The significant effect of honey variety on the content of HMF, saccharose and phenolics, as well as acidity and antioxidant capacity were noted. The impact of variety and variety × production method interaction was significant in the case of the content of vitamin C, glucose and fructose. A visible difference of buckwheat and forest honeys from other samples was observed. The highest content of total phenolics with antioxidant activity based on the SET mechanism was found in buckwheat honeys, while forest honeys were richer in flavonoids.

scholarly journals Development of beverage recipes with specified bio-corrective properties based on plant raw materials with the ultrasonic extraction method

2020 ◽  
Vol 82 (3) ◽  
pp. 189-199
Author(s):  
M. V. Manukovskaya ◽  
I. P. Shchetilina ◽  
A. G. Kudryakova ◽  
S. R. Kozlova ◽  
A. O. Torosyan ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Human Body ◽  
Extraction Method ◽  
Raw Materials ◽  
Ultrasonic Extraction ◽  
Biologically Active ◽  
Plant Raw Materials ◽  
Organoleptic Characteristics ◽  
Active Substances

The development of targeted beverages is a priority for healthy eating. Plant raw materials containing a wide variety of biologically active substances are used for their production. The presence of these ingredients helps to improve many physiological processes in the body, as well as to increase its immune status. The high efficiency of ultrasonic effects on various technological processes was confirmed by numerous studies. Ultrasonic extraction was carried out at t = 20 ? and an ultrasonic wave frequency of 22 kHz. As a result of the research, it was found that the equilibrium state is achieved within 15 minutes with ultrasound exposure. Natural raw materials, their chemical composition and the influence on the human body were studied in the work to develop new beverages recipes. The selected ingredients in a certain quantitative ratio made it possible to obtain beverages with improved bio-corrective properties, which allows satisfying the daily requirement of the human body for biologically active substances. Ultrasonic exposure has a positive effect on the organoleptic characteristics of the beverage and the aftertaste, as proved by the comparative organoleptic evaluation of the samples. The functional properties of the beverages developed were confirmed experimentally. The following was determined in the beverages: macronutrients content, antioxidant activity, vitamin C content, shelf life duration. The ultrasonic extraction method application in the technology of beverages manufacturing allows: to reduce the preparation time by half, to reduce the amount of raw materials by 15%, to increase the content of macronutrients by 45%, to increase the content of vitamin C by 35%, to increase the antioxidant activity by 45-50%, to increase storage stability by 50-60%, to improve organoleptic characteristics. The results obtained prove the intensifying effect of ultrasonic exposure in the production of functional beverages.

Factors affecting consumer preferences for “natural wine”

2020 ◽  
Vol 122 (8) ◽  
pp. 2463-2479 ◽  
Author(s):  
Giuseppina Migliore ◽  
Alkis Thrassou ◽  
Maria Crescimanno ◽  
Giorgio Schifani ◽  
Antonino Galati
Keyword(s):  
Consumer Preferences ◽  
Geographical Area ◽  
Production Method ◽  
Quality Attributes ◽  
Organic Production ◽  
Tobit Regression ◽  
Wine Quality ◽  
Content Type ◽  
Factors Affecting ◽  
Premium Price

PurposeThe aim of this study is to understand which wine quality characteristics, consumers' attitudes and socio-demographic characteristics affect the consumers' willingness to pay (WTP) a premium price for a bottle of natural wine.Design/methodology/approachThe research is experimental and investigated the purchasing intentions of 613 Italian wine consumers within a hypothetical setting. In order to elicit WTP for natural wine, a multiple price list (MPL) in a comparison with one bottle of conventional wine, with an average price of €5 was adopted. To understand which quality attributes of wine affect the consumers' WTP for natural wine, a Tobit regression model was implemented.FindingsThe findings reveal that drink frequency and occasion, organic production method, the content of sulfites, income and the attitudes towards healthy eating and the environment are positively associated with a higher WTP for natural wine.Research limitations/implicationsThe main limitation of this study is related to both the convenient sample and the limited geographical area. However, identifying which quality attributes of natural wine are most appreciated by consumers and which attitudes affect this behaviour is fundamental in order to develop successful marketing strategies for product development and the design of advertising and communication campaigns.Originality/valueThis study is one of the first to analyse the consumer behaviour towards natural wines contributing to enrich that part of the economic literature which states that consumers have a positive attitude towards sustainable wines.

scholarly journals Assessment of Phenolic Content, Antioxidant Activity, Colour and Sensory Attributes of Wood Aged “Tsipouro”

2018 ◽  
Vol 6 (2) ◽  
pp. 318-328 ◽  
Author(s):  
Maria Giannakourou ◽  
Irini F. Stratati ◽  
Efthimia Maria Manika ◽  
Victoria Resiti ◽  
Panagiotis Tataridis ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Quercus Robur ◽  
Phenolic Content ◽  
Sensory Attributes ◽  
Sensory Profile ◽  
Total Phenolic ◽  
High Positive Correlation ◽  
Organoleptic Characteristics ◽  
The Impact

This study aimed at investigating the benefits of immersing oak sticks in the Greek pomace brandy named tsipouro, regarding its total phenolic content, antiradical-antioxidant activity, colour parameters and sensory profile. In order to induce rapid aging of tsipouro, alternative experimental conditions were applied. Results revealed that the phenolic migration from the wood to the tsipouro significantly increased both with temperature increase during aging as well as with the oak sticks /tsipouro ratio (w/v). The impact of oak wood diversity was also tested, by selecting different types of French oak (Quercus robur) and French and American oak mix (Quercus robur- Quercus alba) sticks. Results exhibited a significant effect of wood stick type on total phenolic content, antioxidant and antiradical activity, colour values and sensory attributes, especially on overall acceptance. High positive correlation among total phenolic content, antiradical and antioxidant activity and overall acceptance was found for all the extracts studied. Wood aging promoted the migration of phenolic compounds from the wood into the tsipouro, which, apart from the organoleptic characteristics, could possess health beneficial effects.

scholarly journals Evaluation de la contribution de l’irrigation à la croissance économique et agricole : cas du Maroc

2021 ◽  
Vol 17 (27) ◽  
pp. 218
Author(s):  
Fatima Ezzahra Mengoub ◽  
Caroline Lejars ◽  
Mohammed Rachid Doukkali
Keyword(s):  
Water Resources ◽  
Continuous Improvement ◽  
Methodological Approach ◽  
Geographical Area ◽  
Value Added ◽  
Climatic Conditions ◽  
Growth Accounting ◽  
Primary Role ◽  
Legislative Framework ◽  
The Impact

Situé dans une zone géographique où les ressources hydriques sont limitées, le Maroc a multiplié les efforts pour gérer ses ressources en eau. Ces efforts se sont concrétisés à travers l’amélioration continue du cadre législatif régissant le secteur de l’eau et s’adaptant aux nouvelles contraintes qu’elles soient climatiques, technologiques et/ou économiques. Dans ce sens, ce travail vise l’évaluation de l’impact de ces interventions publiques sur la croissance agricole et économique observées. La démarche méthodologique adoptée se base sur la méthode de comptabilité de croissance ou « Growth Accounting », développée par Solow en 1957. Elle permet de décomposer la croissance en contribution des facteurs et celle de la productivité. Les résultats de cette étude confirment le rôle primordial que joue l’agriculture en tant que moteur de croissance de l’économie marocaine. Ils montrent également que la contribution de l’eau à la croissance de la valeur ajoutée agricole est de l’ordre de 2% et qu’elle demeure tributaire des conditions climatiques, qui à leur tour changent sous l’effet du réchauffement climatique. Located in a geographical area with limited water resources, Morocco has multiplied its efforts to manage its water resources. These efforts have been materialized through the continuous improvement of the legislative framework governing the water sector and adapting to the new constraints whether they are climatic, technological and/or economic. In this sense, this work aims at evaluating the impact of these public interventions on the observed agricultural and economic growth. The methodological approach adopted is based on the growth accounting method developed by Solow in 1957. It allows for the decomposition of growth into factor contributions and productivity contributions. The results of this study confirm the primary role played by agriculture as an engine of growth in the Moroccan economy. They also show that the contribution of water to the growth of agricultural value added is around 2% and that it remains dependent on climatic conditions which are changing under global warming.

scholarly journals The use of ultrasonic extraction in the technology of functional drinks based on plant raw materials

2021 ◽  
Vol 845 (1) ◽  
pp. 012114
Author(s):  
M V Manukovskaya ◽  
I P Shchetilina ◽  
Y N Pisklyukova ◽  
E A Klimova ◽  
M I Korystin
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Human Body ◽  
Raw Materials ◽  
Ultrasonic Extraction ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Plant Raw Materials ◽  
Organoleptic Characteristics ◽  
Active Substances

Abstract The development of targeted drinks is a priority in the field of healthy eating. For their production, plant raw materials are actively used, containing a wide variety of biologically active substances. The presence of these ingredients helps to improve many physiological processes in the body, as well as to increase its immune status. Numerous studies have confirmed the high efficiency of ultrasonic effects on various technological processes. Ultrasonic extraction was carried out at t = 20 °C and an ultrasonic wave frequency of 22 kHz. As a result of research, it was found that with ultrasound exposure, an equilibrium state is achieved within 15 minutes. In order to develop new recipes for drinks, natural raw materials, their chemical composition and the effects on the human body have been studied. The selected ingredients in a certain quantitative ratio made it possible to obtain drinks with improved bio-corrective properties, which allows satisfying the daily requirement of the human body for biologically active substances. Ultrasonic exposure has a positive effect on the organoleptic characteristics of the drink and the aftertaste, as evidenced by the comparative organoleptic evaluation of the samples. The functional properties of the developed drinks have been confirmed experimentally. In the drinks, the following were determined: the content of macronutrients, antioxidant activity, the content of vitamin C, the duration of the shelf life. The use of the method of ultrasonic extraction in the technology of preparing drinks allows one: to reduce the preparation time by half, to reduce the amount of raw materials by 15 %, to increase the content of macronutrients by 45 %, to increase the content of vitamin C by 35 %, to increase the antioxidant activity by 45-50 %, increase stability during storage by 50 – 60 %, increase organoleptic characteristics. The results obtained prove the intensifying effect of ultrasonic exposure in the production of functional drinks.

scholarly journals FORMULASI DAN UJI EFEKTIVITAS ANTIOKSIDAN SEDIAAN KRIM EKSTRAK ETANOL DAUN SALAM (Syzygium Polyanthum (Wight) Walpers.) DENGAN MENGGUNAKAN METODE DPPH (1,1-diphenyl-2-picrylhydrazyl)

PHARMACON ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 720
Author(s):  
Etserlisa A. Apitalau ◽  
Hosea Jaya Edy ◽  
Karlah L.R. Mansauda
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Ethanol Extract ◽  
Experimental Methods ◽  
Physical Test ◽  
A Value ◽  
Activity Test ◽  
Test Parameters ◽  
Dpph Method ◽  
The Impact

ABSTRACTBay leaf (Syzygium Polyanthum (Wight) Walpers.) is known contains flavonoids, saponins, tannins and vitamin C. Flavonoids and vitamin C have an antioxidant activity, since they have the ability to remove and effectively reduce a damaging oxidizer species. The aim of the study is to determine the impact of  the bay leaf ethanol extract enhancement concentration towards  an antioxidant activity of cream preparation by using the DPPH method. This research used laboratory experimental methods. Cream formulations are made with various concentrations 1%, 3%, 6% and 9%. The evaluation results of the bay leaf cream preparation has fulfilled the requirements of homogeneity, organoleptic, pH, adhesion, dispersion, and centrifugation. The results of the antioxidant activity test using the DPPH method using the UV-Vis spectrophotometer which was the most effective as an antioxidant cream from bay leaf extract was 3% with a value IC_50 = 1.4630 ppm and vitamin C as a comparison with a value IC_50 = 0.1131 ppm. From this research, it can be concluded that the cream formulation of bay leaf ethanol extract has fulfilled the physical test parameters, stabile, and had a powerful antioxidant activity.Keywords: : Bay Leaf (Sysigium Polyanthum (Wight) Walpers.), Antioxidant Cream, DPPH (1.1-Diphenyl-2-Picrylhydrazyl) Method  ABSTRAKDaun salam (Syzygium Polyanthum (Wight) Walpers.) diketahui mengandung flavonoid, saponin, tanin dan vitamin C. Senyawa flavonoid dan vitamin C memiliki aktivitas sebagai antioksidan, karena memiliki kemampuan untuk menghilangkan dan secara efektif mengurangi spesies pengoksidasi yang merusak. Penilitian ini bertujuan untuk mengetahui pengaruh peningkatan kosentrasi ekstrak etanol daun salam terhadap aktivitas antioksidan pada sediaan krim dengan menggunakan metode DPPH. Penelitian ini mengggunakan metode eksperimental laboratorium. Formulasi sediaan krim dibuat dengan variasi konsentrasi 1%, 3%, 6% dan 9%. Hasil evaluasi sediaan krim daun salam memenuhi persyaratan homogenitas, organoleptis, pH , daya lekat, daya sebar, sentrifugasi. Hasil uji aktivitas antioksidan dengan metode DPPH menggunakan spektrofotometer UV-Vis yang paling efektif sebagai krim antioksidan dari ekstrak daun salam adalah 3% memiliki nilai = 1,4630 ppm dan vitamin C sebagai pembanding memiliki nilai = 0,1131 ppm. Dari penilitian ini dapat disimpulkan bahwa sediaan krim ekstrak etanol daun salam memenuhi parameter uji fisik, stabil dan memiliki aktivitas antioksidan yang sangat kuat. Kata kunci : Daun Salam (Sysigium Polyanthum (Wight) Walpers.) Krim Antioksidan, Metode DPPH (1.1-Diphenyl-2-Picrylhydrazyl)

scholarly journals Analysis of Nutritional Diversity and Antioxidant Activity of Finger Millet Landraces

2021 ◽  
Author(s):  
T.S. Kazi ◽  
S.L. Laware ◽  
S.G. Auti
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Finger Millet ◽  
Reducing Sugars ◽  
Nutrient Deficiency ◽  
Climatic Conditions ◽  
Urban Region ◽  
Tannin Content ◽  
Potential Source ◽  
Wide Range

Background: Finger millet landraces exhibit great diversity as it grown in wide range of climatic conditions. Landraces keep huge nutritional and antioxidant potential but it has been highly ignored during the course of time. Exploration of landraces are essential to find out potential landraces on the backdrop of malnutrition in tribal pockets and nutrient deficiency in urban region. Methods: Finger millet landraces were collected from tribal pockets of Nashik, Ahmednagar, Dhule and Kolhapur districts of Maharashtra, India. Nutritional and antioxidant studies were done by following standard protocols. Result: Obtained results shows nutritional diversity and exhibit good amount of antioxidant activity. Landraces exhibited significant amount of protein (3.55% to 18.20%), carbohydrates (40% to 78.33%) and reducing sugars (149.67 mg/100 gm to 666 mg/ 100 gm), while vitamin C content did not show variations. Difference in the tannin content of red-brown (7444.67 mg/100gm) and white grains (1347 mg/100gm) was noted. Variation in the phenolic, flavonoids contents and antioxidant activity were noted. The highest antioxidant activity was noted during the investigation (84.95%, 81.41% and 80.53%). To conclude, finger millet landraces are highly nutritious and need to be conserve as potential source of nutrients and antioxidant and for nutritional traits.

scholarly journals Antioxidant Activity and Phenolic Profile of Selected Organic and Conventional Honeys from Poland

Antioxidants ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 44 ◽  
Author(s):  
Michał Halagarda ◽  
Sabrina Groth ◽  
Stanisław Popek ◽  
Sascha Rohn ◽  
Vasilisa Pedan
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Food Product ◽  
Production Method ◽  
Total Phenolic ◽  
Natural Food ◽  
Pollen Content ◽  
Phenolic Profiles ◽  
The Impact

Honey is a natural food product hypothesized to have significant health-beneficial value. The results of recent studies indicate that the biological activity of honey can also be ascribed to phenolic compounds and their antioxidant activity. The aims of this study were: To determine the phenolic profiles of several varieties of Polish honey and their correlation with various factors influencing the quality of honey, plus to verify the impact of production method (organic/conventional) and the pollen content on these profiles. In total, 11 organic and 11 conventional honey samples from Poland were investigated. The botanical origin of the samples was identified through melissopalynological analysis, whereas individual phenolic compounds were determined by the LC/MS analysis. The Folin–Ciocalteau assay was used for the determination of the total phenolic content (TPC). Moreover, the CIE L*a*b* color values were measured and matched with the above-mentioned parameters. The results of the study contribute to the discussion on the health benefits of organic farming. It was found that chrysin may act as a potential indicator compound. The study confirms the existence of the link between TPC and color, and it shows that there is a correlation between pinocembrin and galangin, two compounds that are reported to ameliorate insulin resistance.

scholarly journals DESENVOLVIMENTO DE FITOCOSMÉTICO ANTIOXIDANTE COM EXTRATO DE LARANJA (Citrus sinensis)

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
GABRIELA WOORD MELLO GNANN ◽  
CRISTIANE DE ALMEIDA ◽  
DANIELE MICHELIN PAGANOTTE ◽  
VERA ISAAC ◽  
BRUNA GALDORFINI CHIARI-ANDRÉO ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Life Expectancy ◽  
Vitamin C ◽  
Citrus Sinensis ◽  
Skin Aging ◽  
Organoleptic Characteristics ◽  
Cosmetic Industry ◽  
Microbiological Aspects

Orange (Citrus sinensis) is one of the most cultivated fruits in Brazil. It is known that it contains a relevant amount of vitamin C and, consequently, many properties, such as antioxidant, vasoprotective and hypocholesterolemic. The increase in the life expectancy stimulates the use of products able to retard the effects of time specially in the skin and, in this context, the use of plants and, particularly, of their extracts, came to revolutionize the modern cosmetology. Substances able to inhibit the action of free radicals, such as the vitamin C, can be used in anti-aging cosmetics helping in the prevention or deceleration of the damage produced on the skin. Therefore, this study aimed to evaluate the viability in use orange as a source of antioxidants to the cosmetic industry, mainly for the prepare of antianging formulations. Thus, three orange extracts using different extractive processes were prepared followed by the evaluation of their antioxidant activity. A phytocosmetic was developed with the orange extract that exhibited the higher antioxidant activity, and it was characterized in relation to its organoleptical characteristics, pH, viscosisity and rheology. Also, the microbiological aspects of the phytocosmetic was assessed. The extract prepared by the maceration of the dried orange, using 70% ethanol as solvent, showed significant antioxidant activity, thus, it was used in the phytocosmetic’s development. The pH, viscosity, rheology and organoleptic characteristics determined is suitable to the use in the skin. The microbiological evaluation demonstrated the suitability of the formulation, according to the recommendations of the Brazilian Pharmacopoeia (2019). In conclusion, were demonstrated the applicability of orange extracts in antioxidant phytocosmetics, which could help in the prevention of premature skin aging using a widely available fruit in Brazil.

scholarly journals Bioactive compounds and antioxidant activity in tomatoes (Lycopersicon esculentum L.) cultivars in natura and after thermal processing

2020 ◽  
Vol 9 (11) ◽  
pp. e44991110192
Author(s):  
Angela Vacaro de Souza ◽  
Jéssica Marques de Mello ◽  
Vitória Ferreira da Silva Fávaro ◽  
Victória Farias da Silva ◽  
Diogo de Lucca Sartori ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Phenolic Compounds ◽  
Lycopersicon Esculentum ◽  
Vitamin C ◽  
Bioactive Compounds ◽  
Thermal Processing ◽  
Antioxidant Activities ◽  
The Impact ◽  
Β Carotene

The aim of the study was to evaluate the impact of processing by cooking in natura fruits on the content of bioactive compounds - vitamin C and ascorbic acid, phenolic compounds, flavonoids, carotenoids and anthocyanins, lycopene and β-carotene - and on antioxidant activity - DPPH and FRAP - of 9 varieties of commercial and non-commercial tomatoes. The fruits were harvested when they reached the point of physiological maturation, selected and evaluated in natura, and after grinding and cooking for 30 minutes. At the end of the experiment it was found that all bioactive compounds analyzed showed quantitative reductions when the fruits were processed, with cherry cultivars - 7, 8 and 9 - those that showed superior results compared to different bioactive compounds evaluated, proving to be interesting to be better explored. Regarding the antioxidant activities, the processed fruits of these cultivars showed less losses showing potential to be submitted to processing.

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