A Hemicellulose B Fraction from Grape Skin (Vitisvinifera, Palomino Variety)

2001 ◽  
Vol 64 (9) ◽  
pp. 1174-1178 ◽  
Author(s):  
José M. Igartuburu ◽  
E. Pando ◽  
F. Rodríguez Luis ◽  
Antonio Gil-Serrano
Keyword(s):  
Grape Skin

88-LB: Effects of Grape Skin Extract (GSE) on Glycemic Response to a Starch Challenge in Prediabetic Subjects

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 88-LB
Author(s):  
MEIS ALKASEM ◽  
IBRAHEM ABDALHAKAM ◽  
NOOR N. SULEIMAN ◽  
AHMAD NABIL ISKANDARANI ◽  
TAREQ A. SAMRA ◽  
...  
Keyword(s):  
Skin Extract ◽  
Glycemic Response ◽  
Grape Skin ◽  
Grape Skin Extract

Nitrogen-doped carbon dots from Hutai-8 grape skin and their application in Hg2+ detection

2020 ◽  
Vol 16 ◽  
Author(s):  
Pan Zhang ◽  
Shun-Sheng Zhao ◽  
JiaJia Wang ◽  
Xiang Rong Liu
Keyword(s):  
Heavy Metal ◽  
Carbon Source ◽  
Fluorescence Quenching ◽  
Hydrothermal Method ◽  
Water Samples ◽  
Carbon Dots ◽  
Mercury Ions ◽  
Grape Skin ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Background: In recent years, environmental pollution and heavy metal pollution caused by rapid urbanization and industrialization have become increasingly serious. Among them, mercury (II) ion (Hg2+) is one of the highly toxic heavy metal ions, and its pollution comes from various natural resources and human activities. Therefore, people attach great importance to the development of analytical methods for effective analysis and sensitive detection of Hg2+ . Objective: Using grape skin as a green and environmental friendly carbon source, to synthesize fluorescent carbon dots, and try to apply them to the detect the concentration of Hg2+ in water. Method: Using "Hutai No. 8" grape skin as carbon source, fluorescent carbon dots were synthesized by one-step hydrothermal method. Structure and fluorescent properties of the carbon dots were tested using TEM, XPS, XRD and other characterization instruments, and their utilization on detection of mercury ions in the actual water samples was explored. Results: The CDs had a particle size of about 4.8 nm and a spherical shape. There are N-H, C-N, C=O and other functional groups on the surface. It was found that Hg2+ has obvious fluorescence quenching effect on CDs, and thus CDs fluorescence quenching method to detect the concentration Hg2+ was established, and the detection limit is 3.7 μM, which could be applied to test the concentration of Hg2+ in water samples. Conclusion: Using grape skin as carbon source, fluorescent carbon dots were successfully synthesized by hydrothermal method. Carbon dots were used to detect mercury ions in water, and a method for detecting mercury ions in actual water samples was established.

scholarly journals A spectrofluorimetric sensor based on grape skin tissue for determination of iron(III)

2010 ◽  
Vol 24 (1) ◽  
Author(s):  
Minghui Zhang ◽  
Baozhan Zheng ◽  
Hongyan Yuan ◽  
Dan Xiao
Keyword(s):  
Skin Tissue ◽  
Grape Skin

Endothelium-dependent vasorelaxing activity of wine and other grape products

1993 ◽  
Vol 265 (2) ◽  
pp. H774-H778 ◽  
Author(s):  
D. F. Fitzpatrick ◽  
S. L. Hirschfield ◽  
R. G. Coffey
Keyword(s):  
Coronary Heart Disease ◽  
Heart Disease ◽  
Vascular Function ◽  
Vascular Tissue ◽  
Grape Skin ◽  
Grape Skins ◽  
Grape Juices ◽  
Patent Coronary Artery

Current interest in the presumed benefits of wine in protecting against coronary heart disease prompted us to investigate possible effects of various grape products on vascular function in vitro. Certain wines, grape juices, and grape skin extracts relaxed precontracted smooth muscle of intact rat aortic rings but had no effect on aortas in which the endothelium had been removed. Quercitin and tannic acid, compounds known to be present in grape skins, also produced endothelium-dependent relaxation; two other grape skin compounds, resveratrol and malvidin, did not relax the rings. Phenylephrine-induced contractions were attenuated by prior exposure of aortic rings to grape skin extracts. The extracts also increased guanosine 3',5'-cyclic monophosphate (cGMP) levels in intact vascular tissue, and both relaxation and the increase in cGMP were reversed by NG-monomethyl-L-arginine and NG-nitro-L-arginine, competitive inhibitors of the synthesis of the endothelium-derived relaxing factor, nitric oxide (NO). The vasorelaxation induced by grape products therefore appears to be mediated by the NO-cGMP pathway. If such responses occur in vivo, they could conceivably help to maintain a patent coronary artery and thereby possibly contribute to a reduced incidence of coronary heart disease.

Flavonoid biosynthesis-related genes in grape skin are differentially regulated by temperature and light conditions

Planta ◽  
2012 ◽  
Vol 236 (4) ◽  
pp. 1067-1080 ◽  
Author(s):  
Akifumi Azuma ◽  
Hiroshi Yakushiji ◽  
Yoshiko Koshita ◽  
Shozo Kobayashi
Keyword(s):  
Flavonoid Biosynthesis ◽  
Light Conditions ◽  
Grape Skin

Assessing Spatial Variability of Grape Skin Flavonoids at the Vineyard Scale Based on Plant Water Status Mapping

2017 ◽  
Vol 65 (26) ◽  
pp. 5255-5265 ◽  
Author(s):  
Luca Brillante ◽  
Johann Martínez-Luscher ◽  
Runze Yu ◽  
Cassandra M. Plank ◽  
Luis Sanchez ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Water Status ◽  
Plant Water Status ◽  
Plant Water ◽  
Grape Skin

scholarly journals The Effect of Foliar Application of K2SO4 or KH2PO4 on Skin Color of the ‘Kyoho’ Grape

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2361
Author(s):  
Linnan Wu ◽  
Pengcheng Li ◽  
Haifeng Jia ◽  
Fesobi Olumide Phillip ◽  
Xingcheng Bao ◽  
...  
Keyword(s):  
Skin Color ◽  
Foliar Application ◽  
Flavonoid Biosynthesis ◽  
Soluble Solids ◽  
Anthocyanin Accumulation ◽  
Potassium Fertilizer ◽  
Grape Skin ◽  
Total Anthocyanin ◽  
T1 And T2 ◽  
Two Stages

Anthocyanins in red grape skin have a positive effect on fruit color and human health. The effect of foliar potassium application on anthocyanin accumulation in grape skin is not well understood. The study aimed to better understand the mechanism of anthocyanin accumulation in grape skin in response to foliar sprays of K2SO4 and KH2PO4. In this study, we investigated the effects of foliar application of KH2PO4 (T2), K2SO4 (T1) and distilled water (CK) on the skin color of ‘Kyoho’ grapes at mid-ripe and mature stages. At 90 and 110 days after full bloom (DAFB), T2 had the greatest total soluble solids (TSS), flavonoid and total anthocyanin contents, followed by T1 and CK. At two stages, the titratable acid content decreased and the juice pH increased under T2 treatment relative to CK. T1 and T2 had lower lightness (L*) than CK, and the color index of red grapes (CIRG) under T1 and T2 increased at two stages compared to CK. KEGG metabolic pathway analysis revealed that flavonoid biosynthesis was the most significantly enriched pathway in CK vs. T2 at 90 and 110 DAFB. At 90 DAFB, T2 had higher expressions of phenylalanine ammonia-lyas (PAL), cytochrome P450 CYP73A100 (CYP73A), 4-coumarate: CoA ligase (4CL), chalcone synthase (CHS), flavanone 3-dioxygenase-like (F3H) and UDP glucose: flavonoid 3-o-glucosyl transferase (UFGT) than CK and T1. Foliar application of potassium fertilizer may accelerate anthocyanin accumulation by altering the transcript levels of PAL, CYP73A, 4CL, CHS, F3H, and UFGT of the flavonoid biosynthesis.

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