Effect of chemical and thermal treatments on quality parameters and antioxidant activity of apple (pulp) grown in high Himalayan regions

Recent trends in the food industry combined with novel methods in agriculture could transform rowan into a valuable raw material with potential technological applications. Thus, the aim of this research was to investigate the content of bioactive compounds in its fruits and to assess the color and antioxidant stability of the extracts prepared from such fruits during various thermal treatments and at different pH and ionic strength values. Various spectrophotometric methods, HPLC, and capillary electrophoresis were used to quantify the concentrations of bioactive compounds—polyphenols, carotenoids, organic acids, and to assess antioxidant activity and color. The results show that rowan berries contain circa 1.34–1.47 g/100 g of polyphenols among which include catechin, epicatechin, ferulic acid methyl ester, procyanidin B1, etc.; ca 21.65 mg/100 g of carotenoids including zeaxanthin, β-cryptoxanthin, all-trans-β-carotene, and various organic acids such as malic, citric, and succinic, which result in a high antioxidant activity of 5.8 mmol TE/100 g. Results also showed that antioxidant activity exhibited high stability when the extract was subjected to various thermal treatments, pHs, and ionic strengths, while color was mainly impacted negatively when a temperature of 100 °C was employed. This data confirms the technological potential of this traditional, yet often overlooked species.

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Effect of Thermal Processing on Color, Phenolic Compounds, and Antioxidant Activity of Faba Bean (Vicia faba L.) Leaves and Seeds

Antioxidants ◽

10.3390/antiox10081207 ◽

2021 ◽

Vol 10 (8) ◽

pp. 1207

Author(s):

Shu-Cheng Duan ◽

Soon-Jae Kwon ◽

Seok-Hyun Eom

Keyword(s):

Antioxidant Activity ◽

Faba Bean ◽

Nutritional Value ◽

Cooking Methods ◽

Thermal Treatments ◽

Nutritional Values ◽

Beneficial Effects ◽

Young Leaves ◽

Dry Heating ◽

Positive Correlations

The leaves and seeds of the faba bean are good sources of L-3,4-dihydroxyphenylalanin (L-dopa), and are usually eaten with thermal cooking methods. However, little information is available on the effect of thermal treatments on their nutritional value. We compared the changes in color, contents of L-dopa, vitamin C (Vc), total phenolics (TP), total flavonoids (TF) and antioxidant activity after dry heating or steaming faba bean leaves and seeds. The young leaves provided higher values of all the estimate factors, regardless of the thermal treatment. Steaming significantly degraded nutritional values of the leaves, but less changed in seeds, whereas dry heat maintained these attributes. The contents of L-dopa, Vc, TP and TF were shown to have strongly positive correlations with antioxidant activity in the leaves, whereas only L-dopa content was positively correlated with antioxidant activity of the seeds. Faba leaves contained relatively high L-dopa which possessed strong antioxidant activity compared to the Vc. As L-dopa is an important contributor to the antioxidant activity of faba leaves and seeds, consuming L-dopa from leaves may provide beneficial effects not only regarding Parkinson’s Disease.

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The Comparison of Physicochemical Parameters, Antioxidant Activity and Proteins for the Raw Local Polish Honeys and Imported Honey Blends

Molecules ◽

10.3390/molecules26092423 ◽

2021 ◽

Vol 26 (9) ◽

pp. 2423

Author(s):

Michał Miłek ◽

Aleksandra Bocian ◽

Ewelina Kleczyńska ◽

Patrycja Sowa ◽

Małgorzata Dżugan

Keyword(s):

Antioxidant Activity ◽

Protein Content ◽

Soluble Protein ◽

Protein Profile ◽

Principal Component ◽

Quality Parameters ◽

Total Phenolic ◽

Native Page ◽

Linear Discriminant ◽

Standard Quality

Many imported honeys distributed on the Polish market compete with local products mainly by lower price, which can correspond to lower quality and widespread adulteration. The aim of the study was to compare honey samples (11 imported honey blends and 5 local honeys) based on their antioxidant activity (measured by DPPH, FRAP, and total phenolic content), protein profile obtained by native PAGE, soluble protein content, diastase, and acid phosphatase activities identified by zymography. These indicators were correlated with standard quality parameters (water, HMF, pH, free acidity, and electrical conductivity). It was found that raw local Polish honeys show higher antioxidant and enzymatic activity, as well as being more abundant in soluble protein. With the use of principal component analysis (PCA) and stepwise linear discriminant analysis (LDA) protein content and diastase number were found to be significant (p < 0.05) among all tested parameters to differentiate imported honey from raw local honeys.

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Quality Parameters and Antioxidant Activity of Three Clover Species in Relation to the Livestock Diet

Notulae Botanicae Horti Agrobotanici Cluj-Napoca ◽

10.15835/nbha.44.1.10144 ◽

2016 ◽

Vol 44 (1) ◽

Author(s):

Mirjana P. PETROVIĆ ◽

Milan S. STANKOVIĆ ◽

Bojan S. ANĐELKOVIĆ ◽

Snežana Ž. BABIĆ ◽

Vladimir G. ZORNIĆ ◽

...

Keyword(s):

Antioxidant Activity ◽

Quality Parameters

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The influence of ethanol on the convective drying and on the nutritional quality of dekopon slices

Proceedings of 21th International Drying Symposium ◽

10.4995/ids2018.2018.7772 ◽

2018 ◽

Author(s):

Ronaldo Elias de Mello-Júnior ◽

Nathane Silva Resende ◽

Jefferson Luiz Gomes Corrêa ◽

Leila Aparecida Salles Pio ◽

Elisângela Elena Nunes Carvalho

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Vitamin C ◽

Nutritional Quality ◽

Quality Parameters ◽

Nutritional Composition ◽

Convective Drying ◽

Total Phenolic ◽

Drying Time ◽

Citrus Reticulate

Dekopon or Hallabong (Citrus reticulate “Shiranui”) is a hybrid fruit that belongs to the citrus fruits. The scientific and commercial interests in dekopon is due to its nutritional composition. The objective of the study was to verify the influence of ethanol as a pretreatment in reducing drying time as well as maintaining nutritional quality (vitamin C, total phenolic compounds, and antioxidant activity) of dekopon slices. The drying with ethanol at 70 °C promoted the greatest reduction in drying time, but the processed pretreated samples at 50 °C presented the highest level of nutritional quality parameters. Keywords: drying time; vitamin C; phenolic compounds; antioxidant activity

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Nutrition Quality Parameters of Almonds as Affected by Deficit Irrigation Strategies

Molecules ◽

10.3390/molecules24142646 ◽

2019 ◽

Vol 24 (14) ◽

pp. 2646 ◽

Cited By ~ 9

Author(s):

Lipan ◽

Moriana ◽

Lluch ◽

Cano-Lamadrid ◽

Sendra ◽

...

Keyword(s):

Antioxidant Activity ◽

Water Stress ◽

Volatile Compounds ◽

Deficit Irrigation ◽

Phenolic Content ◽

Quality Parameters ◽

Total Phenolic ◽

Nutrition Quality ◽

Yield And Quality ◽

Volatiles Compounds

The influence of full irrigation, double-regulated (RDI) and sustained deficit irrigation (SDI) treatments on almond quality was assessed by analyzing different parameters: sugars, organic acids, antioxidant activity, total phenolic content (TPC), and volatile compounds. Almond quality studies for plants submitted to water stress are scarce, and it is essential to understand the biochemical responses of plants to water stress in maintaining fruit yield and quality. Citric acid, sucrose, antioxidant activity, and TPC were not affected by the application of studied deficit irrigation strategies (DI). An increase in malic acid and a decrease in glucose was observed for stressed samples (T3 and T4), while a higher number of total volatiles compounds was found for moderate RDI (T2). Using deficit irrigation strategies, the almond yield and quality was not changed, and in fact, some parameters, such as glucose and key volatile compounds, slightly increased under moderate RDI. This finding might encourage farmers to implement these strategies and contribute to sustainable agriculture.

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Deficit Irrigation as a Suitable Strategy to Enhance the Nutritional Composition of HydroSOS Almonds

Water ◽

10.3390/w12123336 ◽

2020 ◽

Vol 12 (12) ◽

pp. 3336

Author(s):

Saray Gutiérrez-Gordillo ◽

Leontina Lipan ◽

Víctor Hugo Durán Zuazo ◽

Esther Sendra ◽

Francisca Hernández ◽

...

Keyword(s):

Antioxidant Activity ◽

Fatty Acid ◽

Chemical Composition ◽

Acid Content ◽

Deficit Irrigation ◽

Fatty Acid Content ◽

Quality Parameters ◽

Nutritional Composition ◽

Control Treatment ◽

Irrigated Agriculture

The Mediterranean region is one of the most water-scarce areas worldwide and is considered a climate-change hotspot. To assure the viability and competitiveness of irrigated agriculture, it is vital to implement strategies that can maximize water saving without compromising yield. Deficit irrigation (DI) for cultivating drought-tolerant species such as almond (Prunus dulcis (Mill.) D.A. Webb) can help in achieving this goal, while at the same time improving fruit chemical composition. This work evaluated the effect of DI techniques and cultivars on the chemical composition of almonds (cvs. Marta, Guara, and Lauranne) in order to elucidate the most suitable irrigation dose under water-scarcity scenarios. Three irrigation regimes were imposed: a control treatment (FI), which was fully irrigated, receiving 100% of the irrigation requirement (IR), and two sustained-deficit irrigation (SDI) strategies that received 75% (SDI75) and 65% (SDI65) of IR. Significant differences among cultivars and irrigation treatments were observed for antioxidant activity and organic acid, sugar, and fatty acid content, which were increased by the SDI strategies. In addition, highly significant correlations were found between leaf-water potential and components such as fumaric acid, sugars, and fatty acids. In terms of the cultivars, cv. Marta showed the highest antioxidant activity, cv. Guara was the richest in organic acids, and cv. Lauranne had the highest fatty acid content. Consequently, SDI strategies improved almond quality parameters related to their nutritional and sensory composition, with significant water savings (reductions of 25–35%) and without important yield loss.

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Biofertilizers Enhance Quality of Onion

Agronomy ◽

10.3390/agronomy10121937 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1937

Author(s):

Bojana Petrovic ◽

Agnieszka Sękara ◽

Robert Pokluda

Keyword(s):

Antioxidant Activity ◽

Positive Impact ◽

Quality Parameters ◽

Organic Fertilizers ◽

Chlorophyll B ◽

Crude Fibre ◽

Mineral Salts ◽

Phosphorus And Potassium ◽

Crude Fibre Content

This investigation was conducted to determine the effect of organic fertilizers on the content of chlorophyll a, chlorophyll b, antioxidant activity, crude fibre, and zinc in two onion cultivars, Stuttgarter Riesen and Rote Laaer, during 2016, 2017, and 2018. In this research, the following treatments were used: B-Stimul (contains Azospirillum Tarrand et al., Azotobacter Beij., Bacillus Cohn, Chlorella vulgaris Beij., and Herbaspirillum Baldani et al.), EkoBooster 2 (contains biostimulators and mineral salts of nitrogen, phosphorus, and potassium) and Vermifit A (extract of compost of Californian earthworm). The results showed that the application of biofertilizers to onion resulted in the highest chlorophyll b content in 2017 in Stuttgarter Riesen. EkoBooster 2 positively affected crude fibre content in both cultivars, but only in 2016. Antioxidant activity was not significantly affected by the interaction of experimental factors. The application of the biostimulating fertilizers can have a positive impact on the quality parameters of onion, but the kind of fertilizer must be suited to seasonal conditions and the cultivar.

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Effects of Production Region, Production Systems and Grape Type/Variety on Nutritional Quality Parameters of Table Grapes; Results from a UK Retail Survey

Foods ◽

10.3390/foods9121874 ◽

2020 ◽

Vol 9 (12) ◽

pp. 1874

Author(s):

Gultakin Hasanaliyeva ◽

Eleni Chatzidimitrou ◽

Juan Wang ◽

Marcin Baranski ◽

Nikolaos Volakakis ◽

...

Keyword(s):

South Africa ◽

Antioxidant Activity ◽

Production System ◽

Production Systems ◽

Quality Parameters ◽

Total Phenolic ◽

Production Region ◽

Table Grapes ◽

Mediterranean Countries ◽

High Concentrations

Grapes contain high concentrations of secondary metabolites and antioxidants that have been linked to a reduction of several chronic diseases. Here, we report results of a UK retail survey, which investigated the effect of the production region (Mediterranean vs. South Africa), grape type (white vs. red vs. black) and variety, and production system (organic vs. conventional) on antioxidant activity and concentrations of phenolic compounds in table grapes. Black grapes had ~180% total antioxidant activity (TAA), ~60% higher total phenolic content (TPC) and ~40 times higher anthocyanin concentrations (TAC) than white grapes, while red grapes had intermediate levels of TAA, TPC and TAC. The effects of season and production system and differences between varieties of the same grape type were substantially smaller. Grapes imported from Mediterranean countries in summer had a 14% higher TPC and ~20% higher TAA than grapes imported from South Africa in winter, and organic grapes had a 16% higher TPC and 22% higher TAA, but ~30% lower TAC than conventional grapes. Significant differences in TPC, TAA and/or TAC between organic and conventional grapes could only be detected for specific grape types, varieties and/or sampling years.

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