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https://www.readbyqxmd.com/read/29146365/sulfur-free-red-wines-through-the-use-of-grapevine-shoots-impact-on-the-wine-quality
#1
Rafaela Raposo, Fabio Chinnici, María José Ruiz-Moreno, Belén Puertas, Francisco J Cuevas, María Carbú, Raúl F Guerrero, Víctor Ortíz-Somovilla, José Manuel Moreno-Rojas, Emma Cantos-Villar
Following a preliminary study to determine the possibility of using a grapevine shoot extract (VIN) as a sustainable alternative to sulfur dioxide (SO2), in this study, the chromatic features, phenolic composition, and sensory analysis of wines treated with VIN at two concentrations were studied during storage in bottle for the first time. The highest differences were found in phenolic compounds after 12months of storage in bottle. The VIN wines had a low content of free anthocyanins and were high in vinyl-pyranoanthocyanins, and B-type vitisins...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29146345/effect-of-high-pressure-processing-on-colour-phytochemical-contents-and-antioxidant-activities-of-purple-waxy-corn-zea-mays-l-var-ceratina-kernels
#2
Kawinchaya Saikaew, Kamol Lertrat, Mutita Meenune, Ratchada Tangwongchai
High-pressure processing (HPP) at 250-700 MPa for 30-45 min affects the colour parameters, phytochemical contents and antioxidant activities of purple waxy corn kernels (p < 0.05). The higher pressure-level, the lower L(∗), a(∗), b(∗), C(∗) and h(o) (p < 0.05). However, pressure-treated kernels at 700 MPa showed a similar colour profile to steam-treated kernels. HPP caused a loss in the total phenolic, flavonoid, and anthocyanin contents and antioxidant activities. The pressure-treated kernels had a higher phytochemical content than the steam-treated kernels...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29146343/classification-of-white-maize-defects-with-multispectral-imaging
#3
Kate Sendin, Marena Manley, Paul J Williams
Multispectral imaging with object-wise multivariate image analysis was evaluated for its potential to grade whole white maize kernels. The types of defective materials regarded in grading legislation were divided into 13 classes, and were imaged with a multispectral imaging instrument spanning the UV, visible and NIR regions (19 wavelengths ranging from 375 to 970nm). Object-wise partial least squares discriminant analysis (PLS-DA) models were developed and validated with an independent data set. Results demonstrated good performance in distinguishing between sound maize and undesirable materials, with cross-validated coefficients of determination (Q(2)) and classification accuracies ranging from 0...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29146314/interaction-of-wine-mannoproteins-and-arabinogalactans-with-anthocyanins
#4
Fernando J Gonçalves, Pedro A R Fernandes, Dulcineia F Wessel, Susana M Cardoso, Silvia M Rocha, Manuel A Coimbra
Wine polymeric material (WPM), which includes polysaccharides, proteins, and polyphenolic compounds, interacts with anthocyanins. To determine the contribution of polysaccharides in these interactions, the diffusion performance of anthocyanins along a dialysis membrane was determined in the presence and absence of isolated mannoproteins (MP) and arabinogalactans (AG) from WPM. Furthermore, to estimate the extent of the interaction between WPM and polyphenolic compounds, the activation energy (Ea) required for their diffusion in the presence of WPM was determined...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29143621/identification-and-characterization-of-regulatory-network-components-for-anthocyanin-synthesis-in-barley-aleurone
#5
Ksenia V Strygina, Andreas Börner, Elena K Khlestkina
BACKGROUND: Among natural populations, there are different colours of barley (Hordeum vulgare L.). The colour of barley grains is directly related to the accumulation of different pigments in the aleurone layer, pericarp and lemma. Blue grain colour is due to the accumulation of anthocyanins in the aleurone layer, which is dependent on the presence of five Blx genes that are not sequenced yet (Blx1, Blx3 and Blx4 genes clustering on chromosome 4HL and Blx2 and Blx5 on 7HL). Due to the health benefits of anthocyanins, blue-grained barley can be considered as a source of dietary food...
November 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29141407/partial-solar-radiation-exclusion-with-color-shade-nets-reduce-the-degradation-of-organic-acids-and-flavonoids-of-grape-berry-vitis-vinifera-l
#6
Johan Martínez-Lüscher, Christopher Cody Lee Chen, Luca Brillante, Sahap Kaan Kurtural
The incidence of solar radiation on red-skinned grapes can promote the synthesis of flavonoid desirable for wine production, elevated temperature may impair their accumulation. We performed a shade cloth trial covering the fruit zone (from pepper-corn size to maturity) with four polyethylene 1-meter curtains with different optical properties (20% shading factor Pearl colored and 40% shading factor Aluminet, Blue and Black colored) and a Control with no cover. Cluster temperature was 3.7°C lower on the Southwest side in Black-40% clusters during the warmest part of the day compared to Control...
November 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29137491/characterization-of-biochemical-traits-of-dog-rose-rosa-canina-l-ecotypes-in-the-central-part-of-iran
#7
Milad Javanmard, Hossein Ali Asadi-Gharneh, Pejman Nikneshan
Dog rose (Rosa canina L.) is a wild native species in Iran, with a significant genetic diversity. This plant serves as a rich source of vitamin C, anthocyanins, phenolic contents and carotenoids. Rose hips have been used in several food products, as well as perfumery and cosmetics industries. In this research, we investigate biochemical characteristics of five dog rose ecotypes (Kopehjamshid, Zarneh, Miyankish, Aghcheh and Sadeghiyeh), that were collected from the central part of Iran (Isfahan province). Amounts of vitamin C, total carotenoids, total phenolic contents, total anthocyanins, macro and micro minerals were measured...
November 14, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29136810/prediction-of-parameters-related-to-grape-ripening-by-multivariate-calibration-of-voltammetric-signals-acquired-by-an-electronic-tongue
#8
L Pigani, G Vasile Simone, G Foca, A Ulrici, F Masino, L Cubillana-Aguilera, R Calvini, R Seeber
An electronic tongue (ET) consisting of two voltammetric sensors, namely a poly-ethylendioxythiophene modified Pt electrode and a sonogel carbon electrode, has been developed aiming at monitoring grape ripening. To test the effectiveness of device and measurement procedures developed, samples of three varieties of grapes have been collected from veraison to harvest of the mature grape bunches. The derived musts have been then submitted to electrochemical investigation using Differential Pulse Voltammetry technique...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29134464/phytochemical-properties-and-antioxidant-activities-of-extracts-from-wild-blueberries-and-lingonberries
#9
Paulina Dróżdż, Vaida Šėžienė, Krystyna Pyrzynska
Among Vaccinium species, blueberries (Vaccinium myrtillus L.) and lingonberries (Vaccinium vitis-idaea) are popular in the human diet. In this study, total phenolic, total flavonoid and total monomeric anthocyanin contents in the ethanol-water extracts of blueberry and lingonberry fruits grown wild in the forests in the central region of Poland were assayed. Antioxidant activities of the extracts from each plant were also evaluated for scavenging ability on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals and reducing power by cupric reducing antioxidant capacity (CUPRAC) method...
November 14, 2017: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/29133132/application-of-dyes-extracted-from-alternanthera-dentata-leaves-and-musa-acuminata-bracts-as-natural-sensitizers-for-dye-sensitized-solar-cells
#10
Mahmoud A M Al-Alwani, Norasikin A Ludin, Abu Bakar Mohamad, Abd Amir H Kadhum, Abduljabbar Mukhlus
The natural dyes anthocyanin and chlorophyll were extracted from Musa acuminata bracts and Alternanthera dentata leaves, respectively. The dyes were then applied as sensitizers in TiO2-based dye-sensitized solar cells (DSSCs). The ethanol extracts of the dyes had maximum absorbance. High dye yields were obtained under extraction temperatures of 70 to 80°C, and the optimal extraction temperature was approximately 80°C. Moreover, dye concentration sharply decreased under extraction temperatures that exceeded 80°C...
November 7, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29132841/pelargonidin-3-o-glucoside-and-its-metabolites-have-modest-anti-inflammatory-effects-in-human-whole-blood-cultures
#11
Anna M Amini, Karolin Muzs, Jeremy Pe Spencer, Parveen Yaqoob
This study hypothesized that the predominant strawberry anthocyanin, pelargonidin-3-O-glucoside (Pg-3-glc), and 3 of its plasma metabolites (4-hydroxybenzoic acid, protocatechuic acid, and phloroglucinaldehyde [PGA]) would affect phagocytosis, oxidative burst, and the production of selected pro- and anti-inflammatory cytokines in a whole blood culture model. For the assessment of phagocytosis and oxidative burst activity of monocytes and neutrophils, whole blood was preincubated in the presence or absence of the test compounds at concentrations up to 5 μmol/L, followed by analysis of phagocytic and oxidative burst activity using commercially available test kits...
September 21, 2017: Nutrition Research
https://www.readbyqxmd.com/read/29131815/the-karrikin-receptor-kai2-promotes-drought-resistance-in-arabidopsis-thaliana
#12
Weiqiang Li, Kien Huu Nguyen, Ha Duc Chu, Chien Van Ha, Yasuko Watanabe, Yuriko Osakabe, Marco Antonio Leyva-González, Mayuko Sato, Kiminori Toyooka, Laura Voges, Maho Tanaka, Mohammad Golam Mostofa, Motoaki Seki, Mitsunori Seo, Shinjiro Yamaguchi, David C Nelson, Chunjie Tian, Luis Herrera-Estrella, Lam-Son Phan Tran
Drought causes substantial reductions in crop yields worldwide. Therefore, we set out to identify new chemical and genetic factors that regulate drought resistance in Arabidopsis thaliana. Karrikins (KARs) are a class of butenolide compounds found in smoke that promote seed germination, and have been reported to improve seedling vigor under stressful growth conditions. Here, we discovered that mutations in KARRIKIN INSENSITIVE2 (KAI2), encoding the proposed karrikin receptor, result in hypersensitivity to water deprivation...
November 13, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/29129901/the-inhibitory-effects-of-anthocyanin-rich-sunrouge-tea-on-pancreatic-lipase-activity
#13
Nobuya Shirai
This study investigated the in vitro and in vivo effects of Sunrouge (SR), which is an anthocyaninrich green tea. Hot and cold water extracts (CWEX) of Yabukita (YK; regular green tea), SR second crop (SR2), and SR third crop (SR3) were prepared. The 50% inhibitory concentrations for YK, SR2, and SR3 CWEXs against pancreatic lipase in vitro were 12.3±2.8, 6.2±0.3, and 4.0±1.1 mg/mL, respectively. Epigallocatechin gallate (EGCG) accounted for 4.3%, 6.0%, and 6.3% of YK, SR2, and SR3 CWEXs, respectively. SR2 had the highest anthocyanin content of these three samples...
November 13, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/29129054/the-mulberry-morus-alba-l-fruit-a-review-of-characteristic-components-and-health-benefits
#14
Qingxia Yuan, Longyan Zhao
Mulberry (Morus alba L.) fruit has a high yield in one fruiting season in many countries, especially in Asia, and a long history of use as an edible fruit and traditional medicine. A great diversity of nutritive compounds such as fatty acids, amino acids, vitamins, minerals and bioactive compounds, including anthocyanins, rutin, quercetin, chlorogenic acid, and polysaccharides have been found in mulberry fruit depending on the cultivars and maturity stages. Furthermore, the extracts and active components of mulberry fruit have demonstrated numerous biological activities, including anti-oxidant, neuroprotective, anti-atherosclerosis, immunomodulative, anti-tumor, anti-hyperglycemic, hypolipidemic activities in vitro and in vivo studies, and received increasing interest from researchers and pharmaceutical companies...
November 13, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29129015/melanoma-inhibition-by-anthocyanins-is-associated-with-the-reduction-of-oxidative-stress-biomarkers-and-changes-in-mitochondrial-membrane-potential
#15
Zoriţa Diaconeasa, Huseyin Ayvaz, Dumitriţa Ruginǎ, Loredana Leopold, Andreea Stǎnilǎ, Carmen Socaciu, Flaviu Tăbăran, Lavinia Luput, Diana Carla Mada, Adela Pintea, Andrew Jefferson
Anthocyanins are water soluble pigments which have been proved to exhibit health benefits. Several studies have investigated their effects on several types of cancer, but little attention has been given to melanoma. The phytochemical content of nine different berry samples was assessed by liquid chromatography followed by electrospray ionization mass spectrometry (LC-ESI(+)-MS). Twenty-six anthocyanins were identified, after a previous C18 Sep-pak clean-up procedure. Chokeberry and red grape anthocyanins rich extracts (C-ARE and RG-ARE) were selected to be tested on normal and melanoma cell lines, due to their different chemical pattern...
November 11, 2017: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/29126004/photovoltaic-characteristics-of-natural-light-harvesting-dye-sensitized-solar-cells
#16
H S Hafez, S S Shenouda, M Fadel
In this work of research, anthocyanin as a natural dye obtained from raspberry fruits, was used and tested as a photon harvesting/electron donating dye in titanium dioxide nanoparticle-based DSSCs. A working photoelectrode made from TiO2 nanoparticles with an average particle size (10-40nm) that is coated on Florine doped tin-oxide substrate, was prepared via a simple and low cost hydrothermal method. A detailed structural and morphological analysis of the TiO2 photoactive electrode was investigated by X-ray diffraction (XRD), diffuse reflectance spectrometer, transmission electron microscope (TEM) and scanning electron microscope (SEM)...
November 7, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29125621/phenolic-composition-and-evaluation-of-the-antimicrobial-activity-of-free-and-bound-phenolic-fractions-from-a-peruvian-purple-corn-zea-mays-l-accession
#17
Lena Gálvez Ranilla, Ashish Christopher, Dipayan Sarkar, Kalidas Shetty, Rosana Chirinos, David Campos
Beneficial effects on overall gut health by phenolic bioactives-rich foods are potentially due to their modulation of probiotic gut bacteria and antimicrobial activity against pathogenic bacteria. Based on this rationale, the effect of the free and bound phenolic fractions from a Peruvian purple corn accession AREQ-084 on probiotic lactic acid bacteria such as Lactobacillus helveticus and Bifidobacterium longum and the gastric cancer-related pathogen Helicobacter pylori was evaluated. The free and bound phenolic composition was also determined by ultra-performance liquid chromatography...
November 10, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/29120800/abscisic-acid-stimulates-anthocyanin-accumulation-in-jersey-highbush-blueberry-fruits-during-ripening
#18
Hee Duk Oh, Duk Jun Yu, Sun Woo Chung, Sinath Chea, Hee Jae Lee
Non-climacteric blueberry (Vaccinium spp.) fruits accumulate high levels of anthocyanins during ripening, which are a good source of dietary antioxidants. This study examined the effects of exogenous abscisic acid (ABA) application on fruit characteristics and anthocyanin accumulation in a northern highbush blueberry (V. corymbosum 'Jersey') during development. Fruits on shrubs were treated with 1gL(-1) ABA before the initiation of fruit colouration. Application of ABA temporarily increased the level of ABA in the fruits during development...
April 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29120773/prediction-models-for-assessing-anthocyanins-in-grape-berries-by-fluorescence-sensors-dependence-on-cultivar-site-and-growing-season
#19
Patrizia Pinelli, Annalisa Romani, Elisa Fierini, Giovanni Agati
Fluorescence sensors are useful tools for the non-destructive assessment of grape berry anthocyanins. The Multiplex (Mx) sensor here studied provides two anthocyanin indices: ANTHR = log(1/Chl-fluorescence_R) and ANTHRG = log(Chl-fluorescence_R/Chl-fluorescence_G), based on the chlorophyll (Chl) fluorescence excited with red (R) and green (G) light. These indices were calibrated against wet chemistry. The dependence of anthocyanin prediction models on cultivar, season and site was studied on four cultivars in two Italian regions during three consecutive years...
April 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29120375/disaccharides-influence-on-volatiles-and-phenolics-of-sour-cherry-juice
#20
Emil Zlatić, Anita Pichler, Mirela Kopjar
The food industry is continuously developing ingredients, processing methods and packaging materials to improve the quality of fruit products. The aim of this work was to study the effect of sugars, a common ingredient in the food industry, on phenolics and volatiles of sour cherry juice. Sucrose, trehalose and maltose chemical isomers were chosen for this investigation. All sugars influenced the evaluated parameters. Samples with maltose addition had lower, while samples with sucrose and trehalose addition had higher anthocyanin content than the control sample...
November 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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