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https://www.readbyqxmd.com/read/28738569/optoacoustic-determination-of-analytical-parameters-and-physicochemical-constants-in-highly-concentrated-solutions-of-chromophores
#1
Kristina V Lobko, Mikhail A Shishkin, Tatyana A Filimonova, Dmitry S Volkov, Ivan M Pelivanov, Mikhail A Proskurnin
Determination of chromophores of various classes-rosaniline (fuchsine), cyanidin-3-O-glucoside, tris(1,10-phenanthroline) iron(II), and phenol red - in their concentrated solutions near their solubility limits is performed with the optoacoustic technique for optically dense solutions; light-absorption coefficients of samples range from 0.5 to 500cm(-1). The assessment of these substances in organo-aqueous and organic solvents is possible up to ca. 0.1molL(-1). Characteristic stability and rate constants of the chelation of iron(II) with 1,10-phenanthroline are determined...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28737734/storage-of-fruits-and-vegetables-in-refrigerator-increases-their-phenolic-acids-but-decreases-the-total-phenolics-anthocyanins-and-vitamin-c-with-subsequent-loss-of-their-antioxidant-capacity
#2
Joseph H Y Galani, Jalpesh S Patel, Nilesh J Patel, Jayant G Talati
It is of paramount importance for consumers, scientists and industrialists to understand how low-temperature storage of food items affects their bioactive compounds and properties. This study evaluated the effects of cold storage on total phenolics (TP), phenolic acids profile (PA), total anthocyanins (TA), total ascorbic acid (Vit. C) and antioxidant activity (AA) of 19 fruits and vegetables, collected from local Indian markets and stored in refrigerator (4 °C) during 15 days. Content of TP was highest in dill and amaranth and decreased (up to 29...
July 24, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28737666/the-role-of-aopp-in-age-related-bone-loss-and-the-potential-benefits-of-berry-anthocyanins
#3
REVIEW
Melissa M Melough, Xin Sun, Ock K Chun
Age-related bone loss is a major factor in osteoporosis and osteoporotic fractures among the elderly. Because bone homeostasis involves a balance between bone formation and resorption, multiple mechanisms may induce age-dependent changes in bone. Oxidative stress is one such factor that contributes to the pathology of aging-associated osteoporosis (AAO). Advanced oxidation protein products (AOPP) are a biomarker of oxidant-mediated protein damage, and can also act to increase the production of reactive oxygen species (ROS), thereby perpetuating oxidative damage...
July 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28736294/enhanced-neuroprotection-of-anthocyanin-loaded-peg-gold-nanoparticles-against-a%C3%AE-1-42-induced-neuroinflammation-and-neurodegeneration-via-the-nf-kb-jnk-gsk3%C3%AE-signaling-pathway
#4
Min Ju Kim, Shafiq Ur Rehman, Faiz Ul Amin, Myeong Ok Kim
Amyloid-beta (Aβ1-42) plaques and neurofibrillary tangles (NFTs) are the main hallmarks considered to be associated with neuroinflammation in Alzheimer's disease (AD). Recently, nanoparticle-based targeted drug delivery approaches have been found to be a useful tool in the neurotherapeutics field. Therefore, we examined and compared the neuroprotective effect of anthocyanins alone and anthocyanin-loaded poly (ethylene glycol)-gold nanoparticles (PEG-AuNPs) in Aβ1-42-injected mouse and in vitro models of AD...
July 20, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28734048/non-anthocyanin-polyphenolic-transformation-by-native-yeast-and-bacteria-co-inoculation-strategy-during-vinification
#5
Apramita Devi, K M Archana, P K Bhavya, K A Anu Appaiah
BACKGROUND: Co-inoculation has been adapted by many wine-producing countries as it enhances the success of malolactic fermentation and reduces the fermentation cost as well as time. However, wine phenolics have been sparsely highlighted during co-inoculation even though polyphenols are important parameter affecting wine colour, astringency and aroma. Here, we investigate the impact of co-inoculation on non-anthocyanin polyphenol profile for two different grape varieties. RESULT: Co-inoculation of native yeast strain (AAV2) along with Oenococcus oeni was adapted for Cabernet Sauvignon and Shiraz wine...
July 22, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28732012/multi-approach-metabolomics-analysis-and-artificial-simplified-phytocomplexes-reveal-cultivar-dependent-synergy-between-polyphenols-and-ascorbic-acid-in-fruits-of-the-sweet-cherry-prunus-avium-l
#6
Mauro Commisso, Martino Bianconi, Flavia Di Carlo, Stefania Poletti, Alessandra Bulgarini, Francesca Munari, Stefano Negri, Matteo Stocchero, Stefania Ceoldo, Linda Avesani, Michael Assfalg, Gianni Zoccatelli, Flavia Guzzo
Fruits of the sweet cherry (Prunus avium L.) accumulate a range of antioxidants that can help to prevent cardiovascular disease, inflammation and cancer. We tested the in vitro antioxidant activity of 18 sweet cherry cultivars collected from 12 farms in the protected geographical indication region of Marostica (Vicenza, Italy) during two growing seasons. Multiple targeted and untargeted metabolomics approaches (NMR, LC-MS, HPLC-DAD, HPLC-UV) as well as artificial simplified phytocomplexes representing the cultivars Sandra Tardiva, Sandra and Grace Star were then used to determine whether the total antioxidant activity reflected the additive effects of each compound or resulted from synergistic interactions...
2017: PloS One
https://www.readbyqxmd.com/read/28731316/phytochemical-analysis-of-myrtus-communis-plant-conventional-versus-microwave-assisted-extraction-procedures
#7
Nadia Bouaoudia-Madi, Lila Boulekbache-Makhlouf, Nabil Kadri, Farid Dahmoune, Hocine Remini, Sofiane Dairi, Sonia Oukhmanou-Bensidhoum, Khodir Madani
Background Myrtle (Myrtus communis L) may constitute an interesting dietary source of health protective compounds. Microwave-assisted extraction (MAE) of total phenolic compounds (TPC) from myrtle leaf, stems, pericarp, and seeds was studied and the results were compared with those of the conventional method extraction (CME) in terms of extraction time. Methods Extraction yield/efficiency and antioxidant activity were measured using radical scavenging assay (DPPH•) and reducing power. Results The results show that the MAE was higher in terms of saving energy, extraction time (62 s) and extraction efficiency of bioactive compound compared to CME (2 h)...
June 10, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28731262/nephroprotective-effects-of-anthocyanin-from-the-fruits-of-panax-ginseng-gfa-on-cisplatin-induced-acute-kidney-injury-in-mice
#8
Zhen-Lan Qi, Zi Wang, Wei Li, Jin-Gang Hou, Ying Liu, Xin-Dian Li, Hui-Ping Li, Ying-Ping Wang
Cisplatin is an effective anticancer chemotherapeutic agent, but the use of cisplatin in the clinic is severely limited by side effects. Nephrotoxicity is a major factor that contributes to the side effects of cisplatin chemotherapy. The aim of this research was to survey the nephroprotective effects of anthocyanin from the fruits of Panax ginseng (GFA) in a murine model of cisplatin-induced acute kidney injury. We observed that pretreatment with GFA attenuated cisplatin-induced elevations in blood urea nitrogen and creatinine levels and histopathological injury induced by cisplatin...
July 21, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28730204/electronic-and-charge-transfer-properties-of-bio-inspired-flavylium-ions-for-applications-in-tio2-based-dye-sensitized-solar-cells
#9
Giuseppe Calogero, Ilaria Citro, Gaetano Di Marco, Stefano Caramori, Laura Casarin, Carlo Alberto Bignozzi, João Avó, A Jorge Parola, Fernando Pina
We present here a complete study on four synthetic environmentally friendly flavylium salts employed as sensitizers for dye-sensitized solar cells (DSSCs). The effect of several donor groups on the molecular structure of flavylium ions was investigated by combining electrochemical, spectroscopic and computational means. The computational investigation indicated that these molecules can interact strongly with the TiO2 surface by a single OH group of the dihydroxybenzene moiety, and can efficiently inject electrons into the TiO2 following the excitation of their lowest singlet states exhibiting charge transfer (CT) character...
July 21, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28720971/determination-of-anthocyanins-and-non-anthocyanin-polyphenols-by-ultra-performance-liquid-chromatography-electrospray-ionization-mass-spectrometry-uplc-esi-ms-in-jussara-euterpe-edulis-extracts
#10
Gláucia S Vieira, Anna S F Marques, Mariana T C Machado, Vanessa M Silva, Miriam D Hubinger
This work aimed to propose two analytical methods for the quantitative and qualitative analysis of major anthocyanins and non-anthocyanin phenolic compounds in jussara (Euterpe edulis) extracts, using ultra performance liquid chromatography-mass spectrometry. These methods were evaluated for selectivity, precision, linearity, detection and quantification limits. The complete separation of 5 anthocyanins and 22 non-anthocyanins polyphenols was achieved in 4.5 and 7 min, respectively. Limits of detection ranged from 0...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720963/releasing-characteristics-of-anthocyanins-extract-in-pectin-whey-protein-complex-microcapsules-coated-with-zein
#11
Arranee Chotiko, Subramaniam Sathivel
This study investigated pectin-based capsules as delivery systems for purple rice bran anthocyanin extract (AE) during exposure to simulated gastrointestinal conditions. Four different capsules loaded with AE were prepared by ionotropic gelation/extrusion, including (1) pectin capsules (PE), (2) pectin capsules coated with zein (PE/ZE), (3) pectin-whey protein isolate complex capsules (PE + WP), and (4) pectin-whey protein isolate complex capsules coated with zein (PE + WP/ZE). CaCl2 in an ethanol solution with or without zein was used as a crosslinking solution...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720952/anthocyanins-enriched-purple-tea-exhibits-antioxidant-immunostimulatory-and-anticancer-activities
#12
Robin Joshi, Ajay Rana, Vinay Kumar, Dharmesh Kumar, Yogendra S Padwad, Sudesh Kumar Yadav, Ashu Gulati
Purple coloured tea shoot clones have gained interest due to high content of anthocyanins in addition to catechins. Transcript expression of genes encoding anthocyanidin reductase (ANR), dihydroflavonol-4-reductase (DFR), anthocyanidin synthase (ANS), flavonol synthase (FLS) and leucoantho cyanidin reductase (LAR) enzymes in three new purple shoot tea clones compared with normal tea clone showed higher expression of CsDFR, CsANR, CsANS and lower expression of CsFLS and CsLAR in purple shoot clones compared to normal clone...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720929/antioxidant-characteristics-of-extracts-of-hibiscus-sabdariffa-calyces-encapsulated-with-mesquite-gum
#13
C E Ochoa-Velasco, C Salazar-González, S Cid-Ortega, J A Guerrero-Beltrán
This study compared the stability of extracts of H. sabdariffa calyces microencapsulated with different concentrations of mesquite gum during storage. Dry Roselle calyces were mixed with 50:50 (v/v) ethanol:water solution to obtain 18°Bx concentrate. This Roselle extract concentrate was mixed with purified mesquite gum (100:1-100:5 v/w). The Roselle extract concentrate-gum (RECG) was spray dried at inlet and outlet temperatures of 180 ± 2 and 104 ± 2.3 °C, respectively, at an air flow rate of 38 m(3)/h...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720800/itraq-based-quantitative-proteomic-analysis-reveals-alterations-in-the-metabolism-of-actinidia-arguta
#14
Miaomiao Lin, Jinbao Fang, Xiujuan Qi, Yukuo Li, Jinyong Chen, Leiming Sun, Yunpeng Zhong
Actinidia arguta 'Tianyuanhong' is a new kiwifruit variety with an all-red pericarp and pulp, in contrast to the all-green pulp of A. arguta 'Yongfengyihao'. Transcriptome profile analysis of fruit color has been reported, however, the metabolic mechanisms producing red flesh remain unknown, and it is unclear why the pulp of 'Tianyuanhong' is red rather than green. Herein, we identified differences between the proteomes of two A. arguta cultivars with different fruit color by using iTRAQ-based quantitative proteomic methods during the stage of color change...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28718724/black-raspberries-and-their-anthocyanin-and-fiber-fractions-alter-the-composition-and-diversity-of-gut-microbiota-in-f-344-rats
#15
Pan Pan, Vy Lam, Nita Salzman, Yi-Wen Huang, Jianhua Yu, Jianying Zhang, Li-Shu Wang
Natural compounds can alter the diversity and composition of the gut microbiome, potentially benefiting our health. We previously demonstrated chemopreventive effects of black raspberries (BRBs) in colorectal cancer, which is associated with gut dysbiosis. To investigate the effects of whole BRBs and their fractions on gut microbiota, we fed F-344 rats a control diet, 5% BRBs, the BRB anthocyanin fraction, or the BRB residue fraction for 6 weeks. Feces were collected at baseline and at weeks 3 and 6, and bacterial sequence counts were analyzed...
July 18, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28718016/blackcurrant-anthocyanins-stimulated-cholesterol-transport-via-post-transcriptional-induction-of-ldl-receptor-in-caco-2-cells
#16
Bohkyung Kim, Minkyung Bae, Young-Ki Park, Hang Ma, Tao Yuan, Navindra P Seeram, Ji-Young Lee
PURPOSES: We previously showed that polyphenol-rich blackcurrant extract (BCE) showed a hypocholesterolemic effect in mice fed a high fat diet. As direct cholesterol removal from the body via the intestine has been recently appreciated, we investigated the effect of BCE on the modulation of genes involved in intestinal cholesterol transport using Caco-2 cells as an in vitro model. METHODS: Caco-2 cells were treated with BCE to determine its effects on mRNA and protein expression of genes important for intestinal cholesterol transport, low-density lipoprotein (LDL) uptake, cellular cholesterol content, and cholesterol transport from basolateral to apical membrane of Caco-2 cell monolayers...
July 17, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28716425/characterization-and-quantification-of-flavonoids-and-organic-acids-over-fruit-development-in-american-cranberry-vaccinium-macrocarpon-cultivars-using-hplc-and-apci-ms-ms
#17
Yifei Wang, Jennifer Johnson-Cicalese, Ajay P Singh, Nicholi Vorsa
Cranberry flavonoids, including anthocyanins, flavonol glycosides and proanthocyanidins, and organic acids were characterized and quantified by HPLC and LC-MS/MS during fruit development and ripening in eight cranberry cultivars. Anthocyanin biosynthesis initiated at early fruit development and reached highest level in mature fruit, with significant differences between cultivars. Major flavonol glycosides, including the most abundant quercetin-3-galactoside and myricetin-3-galactoside, showed consistent concentrations during the season with moderate fluctuation, and were at similar levels in mature fruits of the eight cultivars...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28715926/microencapsulation-of-anthocyanin-rich-black-soybean-coat-extract-by-spray-drying-using-maltodextrin-gum-arabic-and-skimmed-milk-powder
#18
Ana Kalušević, Steva Lević, Bojan Čalija, Milena Pantić, Miona Belović, Vladimir Pavlović, Branko Bugarski, Jela Milić, Slađana Žilić, Viktor Nedović
Black soybean coat is insufficiently valorised food production waste rich in anthocyanins. The goal of the study was to examine physicochemical properties of spray dried extract of black soybean coat in regard to carrier materials: maltodextrin, gum Arabic, and skimmed milk powder. Maltodextrin and gum Arabic-based microparticles were spherical and non-porous while skimmed milk powder-based were irregularly shaped. Low water activity of microparticles (0.31-033), good powders characteristics, high solubility (80...
July 18, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28713820/antioxidant-properties-of-natchez-and-triple-crown-blackberries-using-korean-traditional-winemaking-techniques
#19
Youri Joh, Niels Maness, William McGlynn
This research evaluated blackberries grown in Oklahoma and wines produced using a modified traditional Korean technique employing relatively oxygen-permeable earthenware fermentation vessels. The fermentation variables were temperature (21.6°C versus 26.6°C) and yeast inoculation versus wild fermentation. Wild fermented wines had higher total phenolic concentration than yeast fermented wines. Overall, wines had a relatively high concentration of anthocyanin (85-320 mg L(-1) malvidin-3-monoglucoside) and antioxidant capacity (9776-37845 µmol Trolox equivalent g(-1))...
2017: International journal of food science
https://www.readbyqxmd.com/read/28713491/mulberry-anthocyanin-extract-ameliorates-oxidative-damage-in-hepg2-cells-and-prolongs-the-lifespan-of-caenorhabditis-elegans-through-mapk-and-nrf2-pathways
#20
Fujie Yan, Yushu Chen, Ramila Azat, Xiaodong Zheng
Mulberry anthocyanins possess many pharmacological effects including liver protection, anti-inflammation, and anticancer. The aim of this study was to evaluate whether mulberry anthocyanin extract (MAE) exerts beneficial effects against oxidative stress damage in HepG2 cells and Caenorhabditis elegans. In vitro, MAE prevented cytotoxicity, increased glucose consumption and uptake, and eliminated excessive intracellular free radicals in H2O2-induced cells. Moreover, MAE pretreatment maintained Nrf2, HO-1, and p38 MAPK stimulation and abolished upregulation of p-JNK, FOXO1, and PGC-1α that were involved in oxidative stress and insulin signalling modulation...
2017: Oxidative Medicine and Cellular Longevity
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