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Semkaleng Mpai, Rosemary du Preez, Yasmina Sultanbawa, Dharini Sivakumar
Current study was initiated to identify the phytochemicals and the nutritional profile of eleven Kei-apple fruit accessions. Accession FH29 showed the highest level (492.45 mg 100 g-1 fresh weight) of total phenolic content, higher than the referral fruit, blueberry. Pyrogallol was identified as the predominant phenolic compound in all accessions. Accession FH 29 showed the highest (49.75 µmol TEAC g-1 fresh weight) antioxidant capacity. Catechin content was higher in accessions; FH151, FH15, FH14, FH29, FH243, FH 239 and FH 231...
July 1, 2018: Food Chemistry
XiaoXuan Guo, XiaoHong Sha, Ebeydulla Rahman, Yong Wang, BaoPing Ji, Wei Wu, Feng Zhou
Millet bran, the by-product of millet processing industry, contains an abundance of phytochemicals, especially polyphenols. The main objective of this study was brewing antioxidant wine from millet bran, as well as the nutritional evaluation. The total polyphenol content of wine samples was determined by Folin-Ciocalteu colorimetric method, and the antioxidant capacity was evaluated by DPPH radical-scavenging capacity, Trolox equivalent antioxidant capacity (TEAC), and ferric reducing antioxidant power (FRAP)...
March 2018: Journal of Food Science and Technology
Jie Xu, Tommy Jönsson, Merichel Plaza, Åsa Håkansson, Martin Antonsson, Irini Lazou Ahrén, Charlotta Turner, Peter Spégel, Yvonne Granfeldt
BACKGROUND: Consumption of polyphenol-rich fruits and vegetables may improve postprandial glucose and insulin levels and hence promote well-being. Previously it has been observed that consumption of bilberry decreases the postprandial insulin demand. The intention with the present study was to compare the impact of different supplements with various polyphenol profiles, on the postprandial glucose and insulin responses in healthy young adults. METHODS: In a randomized, controlled, crossover study the postprandial glycemic and insulin responses were observed in eleven healthy adults after intake of five different beverages containing bilberry (European blueberry), blackcurrant, beetroot, mango and rose hip, respectively; all drinks were enriched with the same composition of fermented oatmeal and probiotics...
February 27, 2018: Nutrition Journal
Y Liu, A D Fly, Z Wang, J E Klaunig
OBJECTIVES: This study aimed to examine the effects of green tea extract on working memory in healthy younger (21 - 29 y) and older (50 - 63 y) women. DESIGN: A single-blind, placebo-controlled, crossover design was used. SETTING: A university laboratory. PARTICIPANTS: Twenty non-smoking Caucasian women were recruited in the younger (10) and older (10) age group. INTERVENTION: Subjects received 5...
2018: Journal of Nutrition, Health & Aging
Adriano Sofo, Inês Moreira, Concetta Eliana Gattullo, Luisa Louro Martins, Miguel Mourato
Zinc (Zn) is a common heavy metal in polluted soils, as it is a widespread pollutant deriving both from natural sources and anthropogenic activities. The antioxidant tolerance/defence mechanisms against oxidative stress induced by subtoxic concentrations of Zn (50 and 150 μM ZnSO4 ) were studied in a widespread edible plant (lettuce; Lactuca sativa L.) and in an important model plant (Arabidopsis thaliana (L.) Heynh.). After 10 days (Arabidopsis) and 20 days (lettuce) of Zn exposure, Zn uptake/translocation was evaluated in both roots and shoots, while indicators of oxidative stress and stress intensity, total antioxidant capacity, and enzymatic and non-enzymatic antioxidative defence were measured in leaves...
February 15, 2018: Journal of Trace Elements in Medicine and Biology
Apinya Rachkeeree, Kuttiga Kantadoung, Ratchuporn Suksathan, Ratchadawan Puangpradab, Paul Alexander Page, Sarana Rose Sommano
The nutritional compositions and phytochemical properties of eight edible flowers of the ginger family (Zingiberaceae) commonly found in Thailand are reported herein. The plant genera investigated were Zingiber (Ginger, Phlai Dam, Krathue), Hedychium (two morphological filament forms), Curcuma (Ao), Etlingera (Torch ginger), Amomum (Chi Kuk), and Alpinia (Galangal), which are eaten fresh or cooked as ingredients in the preparation of many Thai dishes. The proximate compositions (moisture, ash, fiber, protein, fat, and carbohydrate contents) varied among the different genera...
2018: Frontiers in Nutrition
Samanta Thomas-Valdés, Cristina Theoduloz, Felipe Jiménez-Aspee, Alberto Burgos-Edwards, Guillermo Schmeda-Hirschmann
The Chilean white strawberry (Fragaria chiloensis spp. chiloensis f. chiloensis) is a semi-domesticated strawberry with high polyphenol content and antioxidant activity occurring in southern Chile. The aim of this work was to compare the composition and bioactivity of the polyphenol-enriched fruit extract (PEE) before and after simulated gastrointestinal digestion (GID). Results show a decrease by >50% in the total phenolic (TP) content at the end of the GID, compared to the non-digested PEE. A reduction in the antioxidant capacity of the PEEs was observed after GID by means of DPPH, FRAP, TEAC and anion superoxide assays...
March 2018: Food Research International
Gerardo Maria de Araújo Filho, Denise Poltronieri Martins, Angélica Marta Lopes, Beatriz de Jesus Brait, Ana Eliza Romano Furlan, Camila Ive Ferreira Oliveira, Lucia Helena Neves Marques, Dorotéia Rossi Silva Souza, Eduardo Alves de Almeida
OBJECTIVE: The objective was to evaluate the genetic and biochemical profiles associated with oxidative stress (OS) in patients with temporal lobe epilepsy with mesial temporal sclerosis (TLE-MTS) and a healthy control group, and also to verify the possible existence of association between OS markers and psychiatric disorders (PD) in group with TLE-MTS. METHODS: Forty-six patients with refractory TLE-MTS and 112 healthy controls were included. Psychiatric evaluation occurred through Diagnostical and Statistical Manual of Mental Disorders (DSM-5) criteria...
January 26, 2018: Epilepsy & Behavior: E&B
Lorena Franco-Martínez, Silvia Martínez-Subiela, Damian Escribano, Sarah Schlosser, Katharina Nöbauer, Ebrahim Razzazi-Fazeli, Diego Romero, Jose Joaquin Cerón, Asta Tvarijonaviciute
A proteomic and biochemical approach was performed to assess the effects of an induced muscle injury on the haemolymph of bivalve molluscs. For this purpose, Mytilus galloprovincialis were exposed to puncture of adductor muscle for three consecutive days, and their haemolymph proteome was then compared to healthy animals using 2-dimensional electrophoresis (2-DE) to identify proteins that differed significantly in abundance. Those proteins were then subjected to tandem mass spectrometry and 6 proteins, namely myosin, tropomyosin, CuZn superoxide dismutase (SOD), triosephosphate isomerase, EP protein and small heat shock protein were identified...
January 30, 2018: Fish & Shellfish Immunology
Petar Žuvela, Jonathan David, Ming Wah Wong
Quantitative structure-activity relationships (QSARs) built using machine learning methods, such as artificial neural networks (ANNs) are powerful in prediction of (antioxidant) activity from quantum mechanical (QM) parameters describing the molecular structure, but are usually not interpretable. This obvious difficulty is one of the most common obstacles in application of ANN-based QSAR models for design of potent antioxidants or elucidating the underlying mechanism. Interpreting the resulting models is often omitted or performed erroneously altogether...
February 5, 2018: Journal of Computational Chemistry
Marika Pellegrini, Antonella Ricci, Annalisa Serio, Clemencia Chaves-López, Giovanni Mazzarrino, Serena D'Amato, Claudio Lo Sterzo, Antonello Paparella
In the present study, the essential oils (EOs) of some officinal plants from Abruzzo territory (Italy) were evaluated for their antimicrobial and antioxidant activities and their volatile fraction chemical characterization. The EOs were extracted from Rosmarinus officinalis, Origanum vulgare, Salvia officinalis, Mentha piperita, Allium sativum, Foeniculum vulgare, Satureja montana, Thymus vulgaris and Coriandrum sativum seeds. The antimicrobial activity was screened against thirteen Gram-positive and Gram-negative strains to determine the Minimal Inhibitory Concentration (MIC)...
February 2, 2018: Foods (Basel, Switzerland)
Ramón M Almela, Camila P Rubio, José J Cerón, Agustina Ansón, Alexander Tichy, Ursula Mayer
BACKGROUND: Oxidative stress (OS) has been shown to be involved in the pathogenesis of human and canine atopic dermatitis (AD) through several distinct mechanisms. Selected serum biomarkers of OS (sbOS) have been validated in normal dogs and studied in several canine diseases. To the best of the authors' knowledge, the sbOS evaluated in this study have not previously been described in canine AD. HYPOTHESIS/OBJECTIVES: The aims of the study were to evaluate a panel of sbOS in dogs with food-induced (FIAD) and non-food-induced (NFIAD) AD: cupric reducing antioxidant capacity (CUPRAC), ferrous oxidation-xylenol orange (FOX), ferric reducing ability of the plasma (FRAP), paraoxonase-1 (PON1), trolox equivalent antioxidant capacity (TEAC) and serum total thiol (THIOL)...
February 1, 2018: Veterinary Dermatology
Kamesh Venkatakrishnan, Hui-Fang Chiu, Ju-Chun Cheng, Ya-Hui Chang, Yan-Ying Lu, Yi-Chun Han, You-Cheng Shen, Kun-Shun Tsai, Chin-Kun Wang
This study aimed to compare the beneficial effect of catechin-enriched green tea and oolong tea on mildly hypercholesterolemic subjects. Sixty mildly hypercholesterolemic subjects (180-220 mg dL-1) were enrolled and divided into three groups as catechin-enriched green tea (CEGT), catechin-enriched oolong tea (CEOT) or placebo. The subjects were instructed to drink 2 × 300 mL of CEGT (780.6 mg of catechin), CEOT (640.4 mg of catechin) or placebo beverage for 12 weeks. Drinking CEGT and CEOT significantly decreased (p < 0...
January 31, 2018: Food & Function
Mansour Sobeh, Fadia S Youssef, Ahmed Esmat, Ganna Petruk, Ahmed H El-Khatib, Daria Maria Monti, Mohamed L Ashour, Michael Wink
Oxidative stress plays a crucial role in the development of several liver diseases. Many natural polyphenols can attenuate oxidative stress and liver injury. In this study, a phytochemical profiling of a methanol extract from leaves of Syzygium samarangense revealed 92 compounds belonging to flavonoids, phenolic acids, condensed tannins, and ellagitannins. The S. samarangense extract exhibited a noticeable antioxidant activity with an EC50 of 5.80 μg/mL measured by DPPH scavenging capacity assay, 2632 Trolox equivalents, 10 mM Fe2+ equivalents/mg of samples by TEAC and FRAP assays, respectively...
January 25, 2018: Food and Chemical Toxicology
Josephine Kschonsek, Theresa Wolfram, Annette Stöckl, Volker Böhm
Polyphenols are antioxidant ingredients in apples and are related to human health because of their free radical scavenging activities. The polyphenolic profiles of old and new apple cultivars (n = 15) were analysed using high-performance liquid chromatography (HPLC) with diode array detection (DAD). The in vitro antioxidant capacity was determined by total phenolic content (TPC) assay, hydrophilic trolox equivalent antioxidant capacity (H-TEAC) assay and hydrophilic oxygen radical absorbance (H-ORAC) assay...
January 24, 2018: Antioxidants (Basel, Switzerland)
Kim Ohanna Pimenta Inada, Paula Andrés Duarte, Jacqueline Lapa, Marco Antônio Lemos Miguel, Mariana Monteiro
Jabuticaba (Myrciaria jaboticaba) is a dark-colored fruit native to Brazil that has a desirable flavor and high anthocyanin content. In the present study, jabuticaba juice was produced by steam-extraction and the phenolic compound profile, antioxidant capacity, instrumental color, and microbiological quality were evaluated during 90 days of storage at 25 °C. Cyanidin-3-O-glucoside represented 45% of the total phenolic content of the juice, which reduced with extent of 80% during storage. Total phenolic content of the juice increased by 59% during 90 days of storage, which entailed, average 4...
January 2018: Journal of Food Science and Technology
Justyna Polak, Mariola Bartoszek
A new equation for converting EC50 into TEAC values and TEAC into EC50 is presented in this paper. The model was fitted to 180 data points of electron paramagnetic resonance (EPR) spectroscopy measurements of various food products. The model was tested basing on 75 EPR spectroscopy measurements. Moreover, the equation was tested on literature data. The determination coefficient between EC50cal and EC50exp was found to be R2 = 0.9762, while the determination coefficient between TEACcal and TEACexp was found to be R2 = 0...
May 15, 2018: Food Chemistry
Kemal Koç, Dilek Pandir
Substances added to food are considerable for survival and are the oldest technologies used in preservation, sweetening and coloring. This work was conducted to evaluate the toxicity of the food additives sunset yellow (SY) and brilliant blue (BB) on Allium cepa root meristematic cells. Control and treatment groups were created from germinated roots. Group 1 (control group) did not receive chemicals. Group 2 (SY or BB-treatment group), received increasing doses of SY (25, 50, 100 and 500 ppm) and BB (100, 200, 400 and 500 ppm) with time periods of 24, 48 and 72 h...
January 10, 2018: Cytotechnology
Oscar Herrera-Calderon, Rocio Santiváñez-Acosta, Bertha Pari-Olarte, Edwin Enciso-Roca, Vicente Martin Campos Montes, Jorge Luis Arroyo Acevedo
Cyperus articulatus (CA) rhizomes have demonstrated different properties on nervous system. However, the leaves still have not studied to treat epilepsy. The aim of this study was to determine the effect of CA ethanolic extract on pentylenetetrazol (PTZ) induced seizures in mice as well as measuring its antioxidant activity in vivo and in vitro. Mice were divided into five groups: (1) control (PTZ 80 mg/kg; i.p.), (2) PTZ-Diazepam (1 mg/kg; i.p.), (3-5) PTZ-CA 50, PTZ-CA 150 and PTZ-CA 300 (50, 150 and 300 mg/kg of CA extract, 30 min prior to each PTZ injection)...
January 2018: Journal of Traditional and Complementary Medicine
Federica Blando, Nadia Calabriso, Helge Berland, Gabriele Maiorano, Carmela Gerardi, Maria Annunziata Carluccio, Øyvind M Andersen
Anthocyanins, the naturally occurring pigments responsible for most red to blue colours of flowers, fruits and vegetables, have also attracted interest because of their potential health effects. With the aim of contributing to major insights into their structure-activity relationship (SAR), we have evaluated the radical scavenging and biological activities of selected purified anthocyanin samples (PASs) from various anthocyanin-rich plant materials: two fruits (mahaleb cherry and blackcurrant) and two vegetables (black carrot and "Sun Black" tomato), differing in anthocyanin content (ranging from 4...
January 6, 2018: International Journal of Molecular Sciences
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