Dynamics of changes in organic acids, sugars and phenolic compounds and antioxidant activity of sea buckthorn and sea buckthorn-apple juices during malolactic fermentation

Fruits are one of the most important sources of phenolic compounds in our diet. Many of these compounds exhibit a wide range of biological activities, especially antioxidant activity. The objective of this study was to determine the composition and antioxidant activity of phenolic compounds found in fruit juice obtained from buckthorn, flowering quince, rowanberry and hawthorn. Hydroxycinnamic acids (neochlorogenic and chlorogenic acid) and procyanidins were the main phenolics in rowanberry juice. The highest level of flavonols (quercetin derivatives) was found in sea buckthorn. All juices showed strong free-radical scavenging activity against ABTS•+ radicals and ferric reducing ability measured by the FRAP method. The strongest antioxidant activity was found in rowanberry juice, but the lowest was measured in hawthorn and sea buckthorn juices.

Download Full-text

Investigation of sugars, organic acids, phenolic compounds, antioxidant activity and the aroma fingerprint of small white apricots grown in Xinjiang

Journal of Food Science ◽

10.1111/1750-3841.15523 ◽

2020 ◽

Vol 85 (12) ◽

pp. 4300-4311

Author(s):

Congyan Su ◽

Xiaochun Zheng ◽

Dandan Zhang ◽

Yu Chen ◽

Jing Xiao ◽

...

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Organic Acids

Download Full-text

NUTRITIONAL AND BIOLOGICAL VALUE OF FRUITS OF CRATAEGUS OXYACANTHA L.

chemistry of plant raw material ◽

10.14258/jcprm.2020015452 ◽

2020 ◽

pp. 265-275

Author(s):

Lyubov' Nikolayevna Skrypnik ◽

Irina Petrovna Melnichuk ◽

Yulia Vladimirovna Koroleva

Keyword(s):

Antioxidant Activity ◽

Ascorbic Acid ◽

Phenolic Compounds ◽

Organic Acids ◽

Food Additives ◽

Raw Material ◽

Transport Infrastructure ◽

Anthropogenic Factors ◽

Total Phenolic ◽

Phytochemical Study

The work involved the phytochemical study of hawthorn fruits (Crataegus oxyacantha L.). Hawthorn fruits were collected in areas with low anthropogenic impact (landscape and recreational areas) and in areas with the transport infrastructure in Kaliningrad city. The content of total phenolic compounds and subgroups: catechins, leucoanthocyanins, flavonoids, tannins); monosaccharides (glucose and fructose), pectins, organic acids, ascorbic acid, macro- and microelements, as well as antioxidant activity in hawthorn fruits were studied. The influence of the anthropogenic factor on the variability of their chemical composition was shown. It has been established that hawthorn fruits from areas with minimal impact of anthropogenic factors can accumulate phenolic compounds (up to 15.9 mg/g), leucoanthocyanins (up to 1.5 mg/g), tannins (up to 6.5 mg/g ), catechins (up to 4.1 mg/g), flavonoids (up to 6.0 mg/g), fructose (up to 14.1%), pectin (up to 11.6%), organic acids (1.45%), ascorbic acid (up to 49.3 mg/100 g), calcium (up to 12.12 mg/g), zinc (up to 39.12 mg/kg) more intensively and demonstrated higher antioxidant activity (up to 9.7 mg/g). The cluster analysis carried out on the content of phytochemicals proved the dependence of the accumulation of nutrients in hawthorn fruits on the growing conditions of plants. The obtained results allow us to consider the fruits of hawthorn C. oxyacantha as a valuable raw material for use as food additives for various purposes.

Download Full-text

STUDY OF THE CONTENT OF ANTIOXIDANTS AND THEIR ACTIVITY IN CONCENTRATED EXTRACTS OF CRANBERRY (VACCINIUM OXYCOCCUS), SEA BUCKTHORN (HIPPOPHAE RHAMNOIDES L.), BLACKBERRY (RUBUS FRUTICOSUS), VIBURNUM (VIBURNUM OPULUS L) AND MOUNTAIN ASH (SORBUS AUCUPARIA L.

chemistry of plant raw material ◽

10.14258/jcprm.2021049365 ◽

2021 ◽

pp. 157-164

Author(s):

Natal'ya Borisovna Eremeeva ◽

Nadezhda Viktorovna Makarova

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Total Content ◽

Sea Buckthorn ◽

Biologically Active ◽

Sorbus Aucuparia ◽

Viburnum Opulus ◽

Rubus Fruticosus ◽

Dpph Method ◽

Mountain Ash

Extracts and their concentrates can be considered as a source of biologically active ingredients of food products and as food additives to increase the consumption of useful substances of berries. The benefits gained from their use lead to the development of advanced technologies that can allow them to be extracted from the feedstock without significantly compromising the biological activity from the feedstock. In this paper, we studied the content of antioxidants and their activity in concentrated extracts of cranberry (Vaccinium Oxycoccus), sea buckthorn (Hippophae rhamnoides L.), blackberry (Rubus fruticosus), viburnum (Viburnum opulus L.) and mountain ash (Sorbus aucuparia L.) berries. For all extracts, the total content of phenolic compounds, flavonoids and anthocyanins, antioxidant activity according to the DPPH method and iron-reducing antioxidant activity (FRAP) were determined. Concentrated extracts of viburnum contain the largest amount of phenolic compounds (9.3±0.3 mol HA/l), flavonoids (1.96±0.08 mol K/l) and anthocyanins (0.26±0.02 mol CG/l) among the studied extracts. There is also a high total content of phenolic substances and flavonoids in blackberry and rowan extracts (5.7 mol HA/l, 1.33 mol K/l and 4.7 mol HA/l, 192 mol K / l, respectively). The antioxidant activity of the extract of viburnum berries showed a directly proportional dependence on the content of biologically active compounds in it: DPPH-method-2.4 mg / ml; FRAP-method-39.99 mmol Fe2+ / kg. Also, high levels were found in concentrated extracts of blackberries, sea buckthorn and mountain ash. It is the extracts of viburnum, blackberry and mountain ash that are recommended to be used in the production of food products to enrich them with biologically active substances and give them antioxidant properties. Cranberry and sea buckthorn extracts can be used in combination with other extracts.

Download Full-text

Efficiency of DPPH and FRAP assays for estimating antioxidant activity and separation of organic acids and phenolic compounds by liquid chromatography in fresh-cut nectarine

Australian Journal of Crop Science ◽

10.21475/ajcs.19.13.07.p1368 ◽

2019 ◽

pp. 1053-1060

Author(s):

Luciana da Silva Borges ◽

Giuseppina Pace Pereira Lima ◽

Francisco Artés ◽

Manoel Euzébio de Souza ◽

Luís de Souza Freitas ◽

...

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Organic Acids ◽

Antioxidant Activities ◽

Minimally Processed ◽

Clear Trend ◽

High O2 ◽

Antioxidant Concentration ◽

Fresh Cut ◽

Uv C

Nectarine contain relevant amounts of antioxidants, including hydroxycinnamic acids, flavan-3-ols, flavonols, anthocyanins, procyanidins, and carotenoids. The aim of this research was to compare the efficiency of DPPH and FRAP assays to estimate antioxidant activities contents in nectarine minimally processed. Moreover, separation of organic acids, phenolic compounds and carotenoids were done by HPLC. Nectarine fruits ‘R48’ cv. were hand harvested, with 80% of their reddish coloration. The following treatments were applied: Control; 1% citric acid + 1% calcium chloride as anti-browning (AB) agent; 4 KJ m-2 UV-C radiation; 8 KJ m-2 UV-C; 12 KJ m-2 UV-C ; AB +  95 kPa O2 (High O2); AB + 4 KJ m-2 UV-C + High O2; AB + 8 kJ m-2 UV-C + High O2 and AB + 12 KJ m-2 UV-C + High O2. We determined antioxidant activity to DPPH; antioxidant activity to FRAP; total phenols and HPLC-DAD analyses. In general the DPPH showed higher efficiency of antioxidant concentration in comparison with FRAP in minimally processed nectarines. There was clear trend in phenolic content in fresh-cut nectarine the treatment AB + 8 kJ m-2UV-C + High O2. The 22 minimally processed nectarine phenolic compounds were studied and quantified by HPLC, being detected: Hydroxycinnamates, flavonols, and anthocyanins. These results allow to conclude that the most abundant compounds found in this study of fresh-cut nectarine were chlorogenic acid, caffeic acid and ellagic acid with HPLC chromatograms were recorded at 280 nm, quercentin 3-galactoside, quercetin 3- Xyloside at 340nm and Cyanidin 3- glucoside at 510nm.

Download Full-text

Castanea sativaMill. Flowers amongst the Most Powerful Antioxidant Matrices: A Phytochemical Approach in Decoctions and Infusions

BioMed Research International ◽

10.1155/2014/232956 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 24

Author(s):

Márcio Carocho ◽

Lillian Barros ◽

Albino Bento ◽

Celestino Santos-Buelga ◽

Patricia Morales ◽

...

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Organic Acids ◽

Phenolic Compound ◽

Total Phenolic ◽

Total Phenolic Compounds ◽

Free Sugars ◽

Hydrolyzable Tannins ◽

Chestnut Tree ◽

Phytochemical Profile

Infusions and decoction of chestnut tree flowers have been used for different medical purposes, but their phytochemical profile and antioxidant activity are still mostly unknown. Herein, decoctions and infusions of flowers from the two most appreciated chestnut cultivars (longalandjudia) in Trás-os-Montes, Portugal, were prepared and characterized with regard to their content in free sugars, organic acids, and phenolic compounds, such as flavonoids and hydrolyzable tannins, and their antioxidant activity. Overall, the decoction of the cultivarjudiawas the sample with both the highest quantity of flavonoids and antioxidant activity. The phenolic compound with the highest abundance in all samples was trigalloyl-HHDP-glucoside, followed by pentagalloyl glucoside. The sample with the highest quantity of total phenolic compounds wasjudiainfusion, closely followed bylongaldecoction, which also gave the highest quantities of ellagitannins. Regarding sugars and organic acids, the profiles were more similar. These results corroborate ancestral claims of the health benefits of infusions and decoctions of chestnut flowers.

Download Full-text