scholarly journals Characterisation of phenolics and other quality parameters of different types of honey

2016 ◽  
Vol 34 (No. 3) ◽  
pp. 244-253 ◽  
Author(s):  
Halouzka Rostislav ◽  
Tarkowski Petr ◽  
Zeljković Sanja Ćavar
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Physicochemical Parameters ◽  
Natural Antioxidants ◽  
Quality Parameters ◽  
Radical Scavengers ◽  
Phenolic Profile ◽  
General Picture ◽  
Different Types ◽  
The Mean

In order to provide a general picture of phytochemical characteristics of nectar honey, honeydew, and mixed honeys, an overall comparison of physicochemical parameters, and phenolic profile as well as antioxidant activity of various types of honey samples has been made. Among all samples analysed, honeydew samples possess the best quality parameters in the mean content of hydroxymethylfurfural, proline, and diastase activity. Moreover, the highest content of phenolic compounds as potential radical scavengers was found in honeydews, then in mixed and multifloral nectar honeys, while samples of monofloral honeys revealed the lowest, but still considerable amounts of natural antioxidants. The overall results of this study indicate that the quality parameters as well as the distribution of phenolic acids and flavonoids are affected by the type of honey.

scholarly journals Preliminary Characterisation of Wastes Generated from the Rapeseed and Sunflower Protein Isolation Process and Their Valorisation in Delaying Oil Oxidation

2021 ◽  
Author(s):  
Miluska Cisneros-Yupanqui ◽  
Vesela I. Chalova ◽  
Hristo R. Kalaydzhiev ◽  
Dasha Mihaylova ◽  
Albert I. Krastanov ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Protocatechuic Acid ◽  
Activity Index ◽  
Natural Antioxidants ◽  
Total Phenolic ◽  
Protein Isolation ◽  
Phenolic Profile ◽  
Oilseed Crops ◽  
Sunflower Protein ◽  
Main Representative

AbstractSince rapeseed and sunflower meals are two of the most representative oilseed crops in the world, this study was focused on ethanol-wash solutes (EWS) obtained as wastes from the protein isolation process of rapeseed and sunflower meals. These meals have been previously valorised; however, the use of the EWS is unexplored. The present study is aimed at the characterisation of their phenolic profile, and antioxidant capacity for preventing lipid oxidation in rapeseed, sunflower, and soybean oil, which has been used as a reference oil. The sunflower EWS exhibited more total phenolic compounds (TPC) and antioxidant activity (119.39 ± 1.13 mg GA/g and 193.97 ± 9.77 mg TE/g, respectively) than the rapeseed one (103.44 ± 5.94 mg GA/g and 89.51 ± 3.17 mg TE/g). The phenolic identification showed hydroxybenzoic and protocatechuic acid in the rapeseed EWS, and pyrogallol and caffeic acid in the sunflower EWS, as the main representative phenols. Both EWS at 15% increased significantly (p < 0.05) the oxidative stability of the oils in the Rancimat equipment with values of antioxidant activity index (AAI) from 1.01 to 1.20, depending on the type of oil employed. In conclusion, the rapeseed and sunflower EWS showed great potential, and they could be used as a source of natural antioxidants within the food industry, replacing the synthetic ones, and promoting the circular economy since they are agro-food wastes.

scholarly journals Antioxidant Activity and Phenolic Content of Campomanesia Phaea Extracts Obtained by Pressurized Liquid Extraction

2019 ◽  
Vol 11 (1) ◽  
pp. 56-65
Author(s):  
Daniele Martins Firmiano ◽  
Gabriela Marques Bittencourt ◽  
Alessandra Lopes de Oliveira
Keyword(s):  
Antioxidant Activity ◽  
Particle Size ◽  
Phenolic Compounds ◽  
Phenolic Content ◽  
Fixed Bed ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Total Phenolic ◽  
High Antioxidant Activity ◽  
The Mean

Objective: This research used the Pressurized Liquid Extraction process (PLE) to obtain cambuci extracts rich in phenolic compounds and, consequently, with high antioxidant activity. Methods: We determined the centesimal composition and the mean particle size of the dried and crushed sample for characterization of the fixed bed extractor. Extractions with pressurized ethanol were performed following a Central Composite Design (CCD) with temperature (60 °C at the center point with ± 10 °C amplitude) and the contact time between the solvent and the matrix (6 min at the center point with ± 2 min amplitude) as independent variables in the process. The Total Phenolic Content (TPC) of compounds and antioxidant activity were determined. Results: The mean particle size of the cambuci in the PLE was 263.4 μm with apparent and real densities of 32.42 g/cm3 and 1.62 g/cm3, respectively, resulting in a fixed bed porosity of 0.43. The centesimal composition of the comminuted and dried sample was 12.5 ± 0.1% moisture, 3.2 ± 0.2% ash, 3.35 ± 0.07% crude protein, 10.32 ± 0.08% crude fiber and 0.35 ± 0.04% ethereal extract. The highest extraction yield (41.7%) was obtained by using the binomial 70 ºC with 8 min of solvent contact in three batches. Extracts with the highest TPC (6501.10 mg AGE/100 g sample) were obtained by the binomial 74 °C with 6 min of contact; the binomial 50 °C with 4 min of contact gave rise to the extract with the highest antioxidant activity. The CCD showed high yield extracts with high antioxidant activity and a high total phenolic compound content. Conclusion: With the use of the proposed experimental design, it was possible to optimize the extraction of total phenolic compounds from the sample.

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

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 

scholarly journals ANALISIS KANDUNGAN GIZI EKSTRAK KULIT SALAK PRODUKSI KELOMPOK TANI ABIAN SALAK DESA SIBETAN SEBAGAI UPAYA PENGEMBANGAN POTENSI PRODUK PANGAN LOKAL

2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Dhyana Putri
Keyword(s):  
Cardiovascular Disease ◽  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Local Food ◽  
Natural Antioxidants ◽  
Descriptive Study ◽  
Boiling Process ◽  
Processed Products ◽  
Water Dilution ◽  
Water Ratio

BackgroundSnakefruit more technically known as ‘Salak’ (Salacca sp) is native fruit of Indonesia regarded as exotic fruit that can consumed not only its flesh fruit but also its skin in the form of extract as it has an efficacy. Extract of snakefruit rind can be proceed into a healthy beverages that contains phenolic compounds which known as natural antioxidants. ObjectiveThis study aimed to describe the content of nutrients such as carbohydrates, proteins, and antioxidants in the extract of snakefruit rind products. This data will be useful as information material to local food industryas well as further research on the processed products for health. Methods This research is a descriptive study that examines the content of carbohydrates, protein, and antioxidants in the extract of snakefruit rind products. Samples were rind of snakefruit with various concentration masses, in water ratio 1%, 5%, 10%, and non compositions. ResultCarbohydrate, protein, antioxidant capacity and IC50 respectively for each composition, are (1) the composition of the 1%: -0.04%; 0.21%; 20.70 ppm, 426.58 ppm; (2) the composition of 5%: 0.82%; 0.20%; 73.40 ppm; 151.41 ppm; (3) the composition of 10%: 0.93%; 0.20%; 110.29 ppm; 87.11 ppm; (4) non composition: 28.14%; 44.90%; 215.10 ppm; 56.10 ppm, and non composition: 1.00%; 0.00%; 25.73 ppm; 92.18 ppm. The most potential nutrient compound in extract of snakefruit rind is the antioxidant, which produced as beverages like tea product. The composition of 10% is the most active category of antioxidant activity, whereas 5% in medium category, and composition of 1% in weak category. Carbohydrates and proteins compound are gradually lower in each composition, caused by boiling process due to the process of water dilution. ConclusionsThis study revealed that extract of snakefruit rind can produced as healthy beverages (such as tea), as it is a potential wastes treatment for local food products. The extract of snakefruit rind consist of nutrition just like proteins, carbohydrates which are great for health and also contains lots of a powerful antioxidant and works well to prevent cardiovascular disease, strokes, and even cancer, prevent allergies, increase fertility, and boost immunity. Keywords: Rind of snakefruit. Antioxidant, Tea

scholarly journals Physicochemical parameters as indicators of the authenticity of monofloral honey from the territory of the Republic of Serbia

2021 ◽  
Vol 40 (1) ◽  
pp. 49
Author(s):  
Saša Milosavljević ◽  
Milka Jadranin ◽  
Mića Mladenović ◽  
Vele Tešević ◽  
Nebojša Menković ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Phenolic Compounds ◽  
Physicochemical Parameters ◽  
Numerical Data ◽  
Physicochemical Analysis ◽  
Quality Parameters ◽  
Acacia Honey ◽  
Quantitative Analyses ◽  
Basic Quality ◽  
The Republic

The aim of this research was to verify the authenticity of monofloral honeys from the territory of the Republic of Serbia on the basis of physicochemical parameters routinely measured in honey quality control using multivariate analysis. Seventeen samples of monofloral honey (11 samples of acacia honey and 6 samples of sunflower honey) from the territory of the Republic of Serbia were analyzed. Physicochemical analysis of the samples included the examination of basic quality parameters and qualitative and quantitative analyses of phenolic compounds. In the samples tested, a total of 93 phenolic compounds were tentatively identified, and 19 of them were quantified. The obtained physicochemical analysis of the data served as input for the multivariate analysis. The hеаt map, which is useful for visualizing numerical data, was used for this purpose. The obtained results showed that the applied data can serve to clearly separate acacia and sunflower honeys.

Microcapsules of Cajá-manga (Spondias dulcis Parkinson): Influence of Different Types of Encapsulating Agents and Drying Technology

2019 ◽  
Vol 15 (6) ◽  
pp. 557-564
Author(s):  
Suelen S. dos Santos ◽  
Letícia M. Rodrigues ◽  
Vicelma L. Cardoso ◽  
Miria H.M. Reis ◽  
Grasiele S. Madrona
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Vitamin A ◽  
Xanthan Gum ◽  
Encapsulation Efficiency ◽  
Physicochemical Analysis ◽  
Drying Methods ◽  
Spray Dryer ◽  
Different Types ◽  
Drying Technology

Background: Cajá-manga is an exotic fruit, source of compounds that have antioxidant activity, such as pro-vitamin A and carotenoids. Objective: Thus, the objective of the present study was to develop an efficient microencapsulation process for cajá-manga pulp by different types of encapsulating agents (maltodextrin and xanthan gum), ratio pulp/carrier agents (1:2 or 1:5), and the drying technology (lyophilization and spray dryer). Methods: Physicochemical analysis, phenolic compounds, carotenoids, antioxidant activity and microcapsule morphology were performed. Results: The cajá-manga and its microcapsulas can be considered source of phenolic compounds, carotenoides and antioxidants. The morphology showed differences between the both drying methods, with encapsulation efficiency greater than 70% in 1:2 (w/w) ratio, and efficiencies around 40% with 1:5 (w/w) pulp and carrier agent. Conclusion: The use of maltodextrin and xanthan gum showed to be viable in the spray dryer and lyophilization drying processes.

Evaluation of the antioxidant activity of the leaves of acerola, guabiroba and ora-pro-nobis

2010 ◽  
Vol 1 (2) ◽  
pp. 129
Author(s):  
Denise Alves Vieira ◽  
Pauline Sambugaro Santos ◽  
Charles Windson Isidoro Haminiuk ◽  
Manuel Salvador Vicente Plata-Oviedo
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Content ◽  
Natural Antioxidants ◽  
Superior Performance ◽  
Good Ability ◽  
Ethanolic Extracts ◽  
Radical Method ◽  
Gallic Acid Equivalent ◽  
Potential Use

<p>The objective of this work was to quantify the total content of phenolic compounds and the antioxidant activity of ethanolic extracts of acerola, guabiroba and ora-pro-nobis leaves. The analysis was performed by the DPPH free-radical method, aiming to find plants with potential use as natural antioxidants in foodstuff. In the extraction of phenolic compounds from leaves, acidified methanol 80% showed superior performance when compared to ethanol 80%. It was found the amounts of 1656.66, 5196.66 and 1693.33 mg GAE (gallic acid equivalent)/100&nbsp;g for acerola, guabiroba and ora-pro-nobis leaves, respectively. Ethanolic extracts of guabiroba and ora-pro-nobis leaves (8.57 &micro;g GAE/mL) presented higher antioxidant activity (92.6 and 92.76%, respectively) than BHT (10.13%), ascorbic acid (19.25%) and similar to trolox (92.79%). The extract of ora-pro-nobis presented the lowest IC<sub>50</sub> (3.22 &mu;g GAE/mL) showing a good ability to capture the DPPH radical.</p><p>&nbsp;</p><p>DOI: http://dx.doi.org/10.14685/rebrapa.v1i2.29</p>

scholarly journals Pengaruh Pencahayaan terhadap Kandungan Pigmen Tetraselmis chuii sebagai Sumber Antioksidan Alami

2018 ◽  
Vol 7 (2) ◽  
pp. 91
Author(s):  
Nada Kristiani Ginting ◽  
Sri Sedjati ◽  
Endang Supriyantini ◽  
Ali Ridlo
Keyword(s):  
Antioxidant Activity ◽  
Chlorophyll A ◽  
Red Light ◽  
Natural Antioxidants ◽  
Daily Basis ◽  
Quality Parameters ◽  
Total Carotenoids ◽  
Tetraselmis Chuii ◽  
Randomized Design ◽  
Risk Of Cancer

Tetraselmis chuii merupakan alga hijau yang mengandung senyawa bioaktif seperti pigmen klorofil dan karotenoid. Pigmen klorofil dapat menurunkan risiko terkena kanker dan berpotensi sebagai antioksidan. Salah satu faktor eksternal yang berpengaruh  terhadap kandungan pigmen adalah cahaya. Penelitian ini bertujuan untuk mengetahui pengaruh warna pencahayaan terhadap biomassa, kandungan  pigmen dan aktivitas antioksidan T. chuii. Rancangan penelitian yang digunakan adalah  rancangan acak blok dengan tiga kali pengulangan. Perlakuan pencahayaan yang diberikan adalah putih, merah, dan biru. Perhitungan kepadatan dan pengukuran parameter kualitas air dilakukan setiap hari. Pemanenan dilakukan pada saat fase stasioner hari ke – 4. Kadar pigmen (klorofil a, b dan karotenoid) dilakukan secara spektrofotometri dan uji aktivitas antioksidan dilakukan dengan DPPH (1,1-difenil-2-pikrilhidrazil). Hasil penelitian menunjukkan bahwa kepadatan sel tertinggi terdapat pada perlakuan pencahayaan putih sebesar 95.800 sel/ml. Kandungan pigmen klorofil a dan klorofil b total tertinggi terdapat pada  pencahayaan merah (48,28 dan 40,86 μg/ml), serta karotenoid total tertinggi terdapat pada pencahayaan biru (6,70 μg/ml). Perlakuan perbedaan pencahayaan memberikan pengaruh nyata (P<0,05) terhadap kandungan pigmen (klorofil a, dan b). Aktivitas antioksidan ekstrak T. chuii  semua perlakuan tergolong sangat lemah ( IC50 lebih dari 200 ppm). Effect of Lighting on Pigments Content Tetraselmis chuii  a Source of Natural Antioxidants Tetraselmis chuii is a green algae which is containing bioactive compounds such as chlorophyll and carotenoid pigments. Chlorophyll may reduce the risk of cancer and potentially as an antioxidant. This research aims to know the effect of light colour  on biomass, pigment and antioxidant activity content of T. chuii. The research design used was a complete randomized design with three repetitions. The light treatments provided are white, red, and blue. Calculation of density and measurement of water quality parameters on daily basis. Harvesting is done during the stasionary phase at fourth day. Pigment levels (chlorophyll a, b and carotenoids) were performed by spectrophotometer and an antioxidant activity test was performed by DPPH (1,1-diphenyl-2-picrilhidrazil). The results showed that different colour lighting treatments had an effect (P <0.05) on pigment content (chlorophyll a, b, and carotenoid).The highest total chlorophyll content of a and chlorophyll b were found in the highest red light (48.28 and 40.86 μg/ ml) and the highest total carotenoids were in blue light (6.70 μg /ml). The highest cell desity in white lighting treatment is 95,800 cell/ml. Potential antioxidant activity of T. chuii extract for all treatments were very low (IC50 more than 200 ppm). 

scholarly journals Impact of Fermentation on Phenolic Compounds and Antioxidant Capacity of Quinoa

Fermentation ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 20
Author(s):  
Francesca Melini ◽  
Valentina Melini
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Phenolic Compound ◽  
Chenopodium Quinoa ◽  
Natural Antioxidants ◽  
Gluten Free ◽  
Good Source ◽  
Nutritional Profile ◽  
Seed Fermentation

Quinoa (Chenopodium quinoa Willd.) is increasingly singled out as a healthy food with an excellent nutritional profile. Besides being suitable for gluten-free diets, it is rich in proteins of excellent quality and is a good source of minerals and vitamins, as well as of natural antioxidants, such as phenolic compounds. The aim of this work is to present how fermentation can affect phenolic compound content and antioxidant capacity of quinoa. It emerged that fermentation can be used to increase phenolic compound content and antioxidant capacity in both quinoa seeds and flours. The use of fermented quinoa flours allowed obtaining bread and pasta richer in phenolic compounds and with a greater antioxidant capacity. Fungi are the main starters used in quinoa seed fermentation, while Lactobacillus strains have been applied to produce sourdoughs. Quinoa has been also fermented to obtain yogurt-like beverages with a higher content in phenolic compounds and a greater antioxidant activity. Strains of Lactobacillus sp. and Bifidobacterium sp. have been used as starters.

Sign in / Sign up

Export Citation Format

Share Document