Effect of cold storage on vitamin C, phenolics and antioxidant activity of five orange genotypes [Citrus sinensis (L.) Osbeck]

2008 ◽  
Vol 49 (3) ◽  
pp. 348-354 ◽  
Author(s):  
Paolo Rapisarda ◽  
Marisol Lo Bianco ◽  
Paolo Pannuzzo ◽  
Nicolina Timpanaro
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Cold Storage ◽  
Citrus Sinensis

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 Pengaruh Penambahan Bubuk Jahe Emprit (Zingiber officinale var. Amarum) Terhadap Karakteristik Teh Herbal Celup Kulit Jeruk Manis (Citrus sinensis L.)

2021 ◽  
Vol 10 (2) ◽  
pp. 200
Author(s):  
Ni Putu Vida Indriani P. ◽  
Putu Timur Ina ◽  
Ni Wayan Wisaniyasa
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Water Content ◽  
Citrus Sinensis ◽  
Orange Peel ◽  
Zingiber Officinale ◽  
Total Flavonoid ◽  
Total Phenolic ◽  
Randomized Design ◽  
Ginger Powder

This study aimed to determine the effect of emprit ginger powder (Zingiber officinale var. Amarum)  on the characteristic of sweet orange peel herbal tea (Citrus sinensis L.) as well as the appropriateness of emprit ginger powder for the best characteristic. This study was designed using an experimental method which is Completely Randomized Design with the treatment of adding emprit ginger powder (0%, 5%, 10%, 15%, 20%) that was repeated  3 times  to obtain 15 experimental units. Observed variabels were water content, extract water content, vitamin C, total phenolic, total flavonoid, antioxidant activity, scoring test, and hedonic test. The obtained data were analyzed by using the analysis of variance. If it had a significant effect, it was continued to be tested by using the Duncan Multiple Range Test. The results showed that the addition of  emprit ginger powder had a very significant effect on the water content, vitamin C, total phenolic, total flavonoid, antioxidant activity, aroma (scoring and hedonic test), taste (scoring and hedonic test), and overall acceptance, while extract levels in the water had a significant effect and color (hedonic test) had a non significant effect. Furthermore, it showed that the addition of 20% emprit ginger powder extract was the best treatment with the characteristic as follows: 8.13% w / w water content, 26.93% w / d extract water content, vitamin C 25.56 mg / g tea powder, total phenol 17.86 mg GAE / g tea powder, total flavonoids 1.17 mg QE / g tea powder, and antioxidant activity 56.89%. The characteristics of the tea brewing water involves the distinctive aroma of ginger emprit which is very liked, the color is liked, the taste is not bitter and liked, and overall acceptance is liked.

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 Comparative Assessment of the Basic Chemical Composition and Antioxidant Activity of Stevia rebaudiana Bertoni Dried Leaves, Grown in Poland, Paraguay and Brazil—Preliminary Results

2021 ◽  
Vol 11 (8) ◽  
pp. 3634
Author(s):  
Teresa Leszczyńska ◽  
Barbara Piekło ◽  
Aneta Kopeć ◽  
Benno F. Zimmermann
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Vitamin C ◽  
Dietary Fiber ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Stevia Rebaudiana ◽  
Steviol Glycosides ◽  
Total Polyphenols ◽  
Stevia Rebaudiana Bertoni

This study compares the content of basic nutrients (proteins, fats, digestible carbohydrates, dietary fiber and ash), steviol glycosides, selected antioxidants (vitamin C, total polyphenols) and antioxidant activity in dried leaves of Stevia rebaudiana Bertoni cultivated in Poland, Paraguay and Brazil and available in the direct sale. The basic chemical composition was determined by standard AOAC (Association of Official Analytical Chemists) methods. Content of steviol glycosides was determined by the UHPLC-UV chromatographic method. Total polyphenols content was expressed as gallic acid equivalent (GAE) and catechins equivalent (CE). Antioxidant activity was measured as ABTS●+ free radical scavenging activity. Dried leaves of S. rebaudiana grown in Poland had significantly higher contents of dietary fiber, and lower protein and ash content, compared to those derived from Paraguay and Brazil. The former had, however, considerably higher contents of total steviol glycosides, stevioside and rebaudioside D, compared to the remaining two plants. In the Paraguay-derived dried leaves, the content of rebaudioside A, C, E and rubusoside was found to be significantly lower. Dried leaves of S. rebaudiana Bertoni, cultivated in Poland, contained substantially more vitamin C and a similar content of total polyphenols, compared to those from Brazil and Paraguay. The examined material from Brazil and Paraguay plantations showed similar antioxidant activity, while that obtained from Polish cultivation was characterized by a significantly lower value of this parameter.

scholarly journals Efficacy of coupling gamma irradiation with calcium chloride and lemongrass oil in maintaining guava fruit quality and inhibiting fungal growth during cold storage

2018 ◽  
Vol 30 (1) ◽  
pp. 67-78 ◽  
Author(s):  
Ramadan A. Hassanein ◽  
Ehab A. Salem ◽  
Ahmed A. Zahran
Keyword(s):  
Vitamin C ◽  
Fruit Quality ◽  
Cold Storage ◽  
Fungal Growth ◽  
Alternaria Solani ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Γ Irradiation ◽  
Lemongrass Oil

AbstractThis study was performed to explore the efficacy of combining more than one postharvest treatment in maintaining some quality attributes and reducing fungal pathogenicity in cold-stored guava fruits. The investigated postharvest treatments included the control, CaCl2(4%), lemongrass oil (2 dm3kg−1), gamma (γ) irradiation (0.2, 0.4 and 0.6 kGy), 0.4 kGy γ irradiation + CaCl2(4%), and 0.4 kGy γ irradiation + lemongrass oil (2 dm3kg−1). The studied physiochemical attributes included weight loss, decay percentage, fruit firmness, total soluble solids (TSS), titratable acidity (TA), and vitamin C content. Different fungal species were also isolated from decayed fruits and were identified asAlternaria alternata,Alternaria solani,Aspergillus niger,Botrytis cinerea,Fusarium solaniandRhizopus stolonifer. The severity of infection for the different fungi was determined, and anin vitroantifungal assay was conducted for lemongrass oil. All the investigated treatments generally reduced decay and water loss percentages, and controlled TSS, TA and vitamin C decrements that occurred during cold storage. On the other hand, higher irradiation doses generally increased fruit softness, and the 0.4 kGy γ dose did not contribute to the overall fruit quality when coupled with CaCl2and lemongrass oil, compared to CaCl2and lemongrass oil treatments alone.

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