dpph-hplc assay Search Results


  • Logo
  • About
  • News
  • Press Release
  • Team
  • Advisors
  • Partners
  • Contact
  • Bioz Stars
  • Bioz vStars
  • 99
    Millipore vitamin c
    Principal component analysis (PCA) projection of two principal components. Vit C: vitamin C; α-toc: α-tocopherol; PA: phenolic acids; Flav: total flavonoids; CA: citric acid; SFA: saturated fatty acids; MUFA: monounsaturated fatty acids; PUFA: polyunsaturated fatty acids; Fr: fructose; Gl: glucose; Suc: sucrose; Fe: iron; K: potassium; IF: insoluble fiber; SF: soluble fiber; DPPH: DPPH assay; PR: reduction power assay; ID β-carot: inhibition of discoloration of β-carotene.
    Vitamin C, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 165 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/vitamin c/product/Millipore
    Average 99 stars, based on 165 article reviews
    Price from $9.99 to $1999.99
    vitamin c - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore 2 2 diphenyl 1 picrylhydrazyl dpph
    Antioxidant capacity calculated with ferric-reducing antioxidant power (FRAP), diammonium salt (ABTS) and <t>2,2-diphenyl-1-picrylhydrazyl</t> <t>(DPPH)</t> methods for all the samples analyzed expressed in µmol equivalents of TROLOX 100 g −1 dried (DS) or wet sample (WS). raw sofrito 1 (S1); cooked sofrito 1–6 (CS1–6). Different superscripts in the results of the same method indicate statistically significant different values ( p
    2 2 Diphenyl 1 Picrylhydrazyl Dpph, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 1679 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/2 2 diphenyl 1 picrylhydrazyl dpph/product/Millipore
    Average 99 stars, based on 1679 article reviews
    Price from $9.99 to $1999.99
    2 2 diphenyl 1 picrylhydrazyl dpph - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore β carotene
    Carotenoids content as <t>β-Carotene</t> of cereal milling by-products (dw). The vertical bars represent the SD (n = 3), and values marked by the same letter are not significantly different ( P
    β Carotene, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 1303 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/β carotene/product/Millipore
    Average 99 stars, based on 1303 article reviews
    Price from $9.99 to $1999.99
    β carotene - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore 6 hydroxy 2
    Carotenoids content as <t>β-Carotene</t> of cereal milling by-products (dw). The vertical bars represent the SD (n = 3), and values marked by the same letter are not significantly different ( P
    6 Hydroxy 2, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 1244 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/6 hydroxy 2/product/Millipore
    Average 99 stars, based on 1244 article reviews
    Price from $9.99 to $1999.99
    6 hydroxy 2 - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore folin ciocalteu reagent
    The absorbance (760 nm) obtained for <t>Folin-Ciocalteu</t> assay for polyphenols in different fractions of black tea extract obtained after treatment with PVPP columns containing 0.9, 0.7, and 0.3 g (a), absorbance (760 nm) of gallic acid (100 μ g/mL), vanillin (100 μ g/mL), epigallocatechin gallate (EGCG) (100 μ g/mL), and fresh tea flush (200 μ g/mL) after treatment with PVPP column (0.9 g) for Folin-Ciocalteu assay (b), and absorbance at 280 nm for GA (100 μ g/mL), vanillin (100 μ g/mL), and epigallocatechin gallate (EGCG) (100 μ g/mL) (c). Fraction number “0” is the absorbance obtained for fresh tea flush extract before the PVPP treatment. The values are expressed as Mean ± SD. Number of replicates for each experiment are given in the text.
    Folin Ciocalteu Reagent, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 1349 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/folin ciocalteu reagent/product/Millipore
    Average 99 stars, based on 1349 article reviews
    Price from $9.99 to $1999.99
    folin ciocalteu reagent - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore 2 2 azino bis
    Changes of antioxidant activities during fermentation of TVSB by F. fraxinea . Different letters indicate values that are significantly different by Duncan’s multiple range test at 5% level. TEAC, Trolox equivalent antioxidant capacity. DPPH, <t>2,2-diphenyl-1-picrylhydrazyl;</t> ABTS, <t>2,2′-azino-bis-3-ethylbenzothiazoline-6-sulfonic</t> acid; FRAP, ferric reducing antioxidant power. Error bars are the standard deviations of triplicate measurements.
    2 2 Azino Bis, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 3285 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/2 2 azino bis/product/Millipore
    Average 99 stars, based on 3285 article reviews
    Price from $9.99 to $1999.99
    2 2 azino bis - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore sodium carbonate
    Changes of antioxidant activities during fermentation of TVSB by F. fraxinea . Different letters indicate values that are significantly different by Duncan’s multiple range test at 5% level. TEAC, Trolox equivalent antioxidant capacity. DPPH, <t>2,2-diphenyl-1-picrylhydrazyl;</t> ABTS, <t>2,2′-azino-bis-3-ethylbenzothiazoline-6-sulfonic</t> acid; FRAP, ferric reducing antioxidant power. Error bars are the standard deviations of triplicate measurements.
    Sodium Carbonate, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 1683 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/sodium carbonate/product/Millipore
    Average 99 stars, based on 1683 article reviews
    Price from $9.99 to $1999.99
    sodium carbonate - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore trolox
    The <t>DPPH</t> free-radical scavenging capacity of six different parts of C. deserticola and the comparisons among sample R1 and reference antioxidants of <t>Trolox</t> and l -Ascorbic acid.
    Trolox, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 3589 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/trolox/product/Millipore
    Average 99 stars, based on 3589 article reviews
    Price from $9.99 to $1999.99
    trolox - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore quercetin
    Analysis of flavonoid accumulation in 5 developmental stages of leaves from the  Malus  crabapple cultivars ‘Royalty’ and ‘Flame’. S1, 3 days after budding; S2, 9 days after budding; S3, 15 days after budding; S4, 21 days after budding; S5, 30 days after budding. ( A ) Five leaf developmental stages used for the analysis. ( B ) HPLC analysis of methanol extracts from crabapple leaf. A1, cyanidin 3-O-glucoside; F1, quercetin 3-O-diglucoside; F2, procyanidin dimer; F3, quercetin 3-O-glucoside; F4, quercetin 3-O-glycosidase isomer; F5, avicularin; F6, acetyl quercetin 3-O-glucoside; F7, acetyl quercetin 3-O-glycosidase isomer; F8, avicularin isomer; F9, quercetin 3-O-rhamnoside; F10, phloridzin. ( C ) The total anthocyanins content and total flavonols content in 5 developmental stages of leaves of the two crabapple cultivars. Error bars indicate the standard error of the mean ± SE of three replicate measurements. Different letters above the bars indicate significantly different values ( P
    Quercetin, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 1545 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/quercetin/product/Millipore
    Average 99 stars, based on 1545 article reviews
    Price from $9.99 to $1999.99
    quercetin - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore abts
    Loading plot of principal component analysis (PCA) from the variation observed of six buckwheat samples. FP, free phenolic; FF, free flavonoid; BP, bound phenolic; BF, bound flavonoid; GA, gallic acid; HA, 4-hydroxybenzoic acid; CA, 5-caffeoylquinic acid; SA, syringic acid; DIM, dihydromyricetin; RUT, rutin; FA, ferulic acid; KAE-3-RUT, kaempferol-3-O-rutinoside; QUE, quercetin; API, apigenin; KAE, kaempferol; DPPH, 1,1-diphenyl-2-picrylhydrazyl; <t>ABTS</t> + , 2, <t>2-azino-bis</t> (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt; FRAP, ferric reducing/antioxidant power; OH•, hydroxyl radical.
    Abts, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 2570 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/abts/product/Millipore
    Average 99 stars, based on 2570 article reviews
    Price from $9.99 to $1999.99
    abts - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore caffeic acid
    Loading plot of principal component analysis (PCA) from the variation observed of six buckwheat samples. FP, free phenolic; FF, free flavonoid; BP, bound phenolic; BF, bound flavonoid; GA, gallic acid; HA, 4-hydroxybenzoic acid; CA, 5-caffeoylquinic acid; SA, syringic acid; DIM, dihydromyricetin; RUT, rutin; FA, ferulic acid; KAE-3-RUT, kaempferol-3-O-rutinoside; QUE, quercetin; API, apigenin; KAE, kaempferol; DPPH, 1,1-diphenyl-2-picrylhydrazyl; <t>ABTS</t> + , 2, <t>2-azino-bis</t> (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt; FRAP, ferric reducing/antioxidant power; OH•, hydroxyl radical.
    Caffeic Acid, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 1558 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/caffeic acid/product/Millipore
    Average 99 stars, based on 1558 article reviews
    Price from $9.99 to $1999.99
    caffeic acid - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    95
    Millipore 2 pyridyl 5 6 diphenyl 1
    Loading plot of principal component analysis (PCA) from the variation observed of six buckwheat samples. FP, free phenolic; FF, free flavonoid; BP, bound phenolic; BF, bound flavonoid; GA, gallic acid; HA, 4-hydroxybenzoic acid; CA, 5-caffeoylquinic acid; SA, syringic acid; DIM, dihydromyricetin; RUT, rutin; FA, ferulic acid; KAE-3-RUT, kaempferol-3-O-rutinoside; QUE, quercetin; API, apigenin; KAE, kaempferol; DPPH, 1,1-diphenyl-2-picrylhydrazyl; <t>ABTS</t> + , 2, <t>2-azino-bis</t> (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt; FRAP, ferric reducing/antioxidant power; OH•, hydroxyl radical.
    2 Pyridyl 5 6 Diphenyl 1, supplied by Millipore, used in various techniques. Bioz Stars score: 95/100, based on 84 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/2 pyridyl 5 6 diphenyl 1/product/Millipore
    Average 95 stars, based on 84 article reviews
    Price from $9.99 to $1999.99
    2 pyridyl 5 6 diphenyl 1 - by Bioz Stars, 2020-09
    95/100 stars
      Buy from Supplier

    99
    Millipore potassium persulfate
    Loading plot of principal component analysis (PCA) from the variation observed of six buckwheat samples. FP, free phenolic; FF, free flavonoid; BP, bound phenolic; BF, bound flavonoid; GA, gallic acid; HA, 4-hydroxybenzoic acid; CA, 5-caffeoylquinic acid; SA, syringic acid; DIM, dihydromyricetin; RUT, rutin; FA, ferulic acid; KAE-3-RUT, kaempferol-3-O-rutinoside; QUE, quercetin; API, apigenin; KAE, kaempferol; DPPH, 1,1-diphenyl-2-picrylhydrazyl; <t>ABTS</t> + , 2, <t>2-azino-bis</t> (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt; FRAP, ferric reducing/antioxidant power; OH•, hydroxyl radical.
    Potassium Persulfate, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 811 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/potassium persulfate/product/Millipore
    Average 99 stars, based on 811 article reviews
    Price from $9.99 to $1999.99
    potassium persulfate - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore epicatechin
    Kinetics of caffeine, gallic acid and <t>catechin</t> extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )
    Epicatechin, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 1143 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/epicatechin/product/Millipore
    Average 99 stars, based on 1143 article reviews
    Price from $9.99 to $1999.99
    epicatechin - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    92
    Merck KGaA hplc grade methanol
    Kinetics of caffeine, gallic acid and <t>catechin</t> extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )
    Hplc Grade Methanol, supplied by Merck KGaA, used in various techniques. Bioz Stars score: 92/100, based on 824 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/hplc grade methanol/product/Merck KGaA
    Average 92 stars, based on 824 article reviews
    Price from $9.99 to $1999.99
    hplc grade methanol - by Bioz Stars, 2020-09
    92/100 stars
      Buy from Supplier

    99
    Millipore ferulic acid
    Kinetics of caffeine, gallic acid and <t>catechin</t> extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )
    Ferulic Acid, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 994 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/ferulic acid/product/Millipore
    Average 99 stars, based on 994 article reviews
    Price from $9.99 to $1999.99
    ferulic acid - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore p coumaric acid
    Kinetics of caffeine, gallic acid and <t>catechin</t> extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )
    P Coumaric Acid, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 1229 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/p coumaric acid/product/Millipore
    Average 99 stars, based on 1229 article reviews
    Price from $9.99 to $1999.99
    p coumaric acid - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore sodium acetate
    Kinetics of caffeine, gallic acid and <t>catechin</t> extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )
    Sodium Acetate, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 5584 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/sodium acetate/product/Millipore
    Average 99 stars, based on 5584 article reviews
    Price from $9.99 to $1999.99
    sodium acetate - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore dimethyl sulfoxide dmso
    Kinetics of caffeine, gallic acid and <t>catechin</t> extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )
    Dimethyl Sulfoxide Dmso, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 20238 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/dimethyl sulfoxide dmso/product/Millipore
    Average 99 stars, based on 20238 article reviews
    Price from $9.99 to $1999.99
    dimethyl sulfoxide dmso - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore 2 4 6 tris 2 pyridyl s triazine
    Kinetics of caffeine, gallic acid and <t>catechin</t> extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )
    2 4 6 Tris 2 Pyridyl S Triazine, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 313 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/2 4 6 tris 2 pyridyl s triazine/product/Millipore
    Average 99 stars, based on 313 article reviews
    Price from $9.99 to $1999.99
    2 4 6 tris 2 pyridyl s triazine - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    99
    Millipore 2 4 6 tripyridyl s triazine tptz
    Kinetics of caffeine, gallic acid and <t>catechin</t> extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )
    2 4 6 Tripyridyl S Triazine Tptz, supplied by Millipore, used in various techniques. Bioz Stars score: 99/100, based on 288 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/2 4 6 tripyridyl s triazine tptz/product/Millipore
    Average 99 stars, based on 288 article reviews
    Price from $9.99 to $1999.99
    2 4 6 tripyridyl s triazine tptz - by Bioz Stars, 2020-09
    99/100 stars
      Buy from Supplier

    Image Search Results


    Principal component analysis (PCA) projection of two principal components. Vit C: vitamin C; α-toc: α-tocopherol; PA: phenolic acids; Flav: total flavonoids; CA: citric acid; SFA: saturated fatty acids; MUFA: monounsaturated fatty acids; PUFA: polyunsaturated fatty acids; Fr: fructose; Gl: glucose; Suc: sucrose; Fe: iron; K: potassium; IF: insoluble fiber; SF: soluble fiber; DPPH: DPPH assay; PR: reduction power assay; ID β-carot: inhibition of discoloration of β-carotene.

    Journal: Foods

    Article Title: Characterization of Extra Early Spanish Clementine Varieties (Citrus clementina Hort ex Tan) as a Relevant Source of Bioactive Compounds with Antioxidant Activity

    doi: 10.3390/foods9050642

    Figure Lengend Snippet: Principal component analysis (PCA) projection of two principal components. Vit C: vitamin C; α-toc: α-tocopherol; PA: phenolic acids; Flav: total flavonoids; CA: citric acid; SFA: saturated fatty acids; MUFA: monounsaturated fatty acids; PUFA: polyunsaturated fatty acids; Fr: fructose; Gl: glucose; Suc: sucrose; Fe: iron; K: potassium; IF: insoluble fiber; SF: soluble fiber; DPPH: DPPH assay; PR: reduction power assay; ID β-carot: inhibition of discoloration of β-carotene.

    Article Snippet: For vitamin C and organic acids characterization ascorbic acid, oxalic, malic, citric, and fumaric acids were all from Sigma-Aldrich; and glutamic acid from Merck.

    Techniques: DPPH Assay, Inhibition

    Antioxidant capacity calculated with ferric-reducing antioxidant power (FRAP), diammonium salt (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) methods for all the samples analyzed expressed in µmol equivalents of TROLOX 100 g −1 dried (DS) or wet sample (WS). raw sofrito 1 (S1); cooked sofrito 1–6 (CS1–6). Different superscripts in the results of the same method indicate statistically significant different values ( p

    Journal: Antioxidants

    Article Title: Influence of Cooking and Ingredients on the Antioxidant Activity, Phenolic Content and Volatile Profile of Different Variants of the Mediterranean Typical Tomato Sofrito

    doi: 10.3390/antiox8110551

    Figure Lengend Snippet: Antioxidant capacity calculated with ferric-reducing antioxidant power (FRAP), diammonium salt (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) methods for all the samples analyzed expressed in µmol equivalents of TROLOX 100 g −1 dried (DS) or wet sample (WS). raw sofrito 1 (S1); cooked sofrito 1–6 (CS1–6). Different superscripts in the results of the same method indicate statistically significant different values ( p

    Article Snippet: Gallic acid, (±)-6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid (TROLOX), Folin–Ciocalteu reagent, 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS); 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,4,6-tris(2-pyridyl) S-Triazine (TPTZ), hexanal, trans-2-heptenal, octanal and trans-2-decenal volatiles standards were acquired from Sigma–Aldrich Inc. (St. Louis, MO, USA).

    Techniques:

    DPPH radical scavenging activity ( A ); ABTS radical scavenging activity ( B ); FRAP activity ( C ); Reducing power ( D ); and ORAC ( E ) in the different parts of A. senticosus and A. koreanum . Each bar represents the mean ± SD of triplicate determinations, n = 3. Statistical analysis was performed using one-way ANOVA ( p

    Journal: Molecules

    Article Title: The Antioxidant Activity and Their Major Antioxidant Compounds from Acanthopanax senticosus and A. koreanum

    doi: 10.3390/molecules200713281

    Figure Lengend Snippet: DPPH radical scavenging activity ( A ); ABTS radical scavenging activity ( B ); FRAP activity ( C ); Reducing power ( D ); and ORAC ( E ) in the different parts of A. senticosus and A. koreanum . Each bar represents the mean ± SD of triplicate determinations, n = 3. Statistical analysis was performed using one-way ANOVA ( p

    Article Snippet: Chemicals The reagents sodium carbonate, aluminum nitrate, potassium ferricyanide, sodium hydroxide, Folin-Ciocalteu’s phenol reagent, vanillin, potassium acetate, Trolox, potassium persulfate, sodium phosphate dibasic, trichloroacetic acid, ferric chloride, phosphoric acid, gallic acid, rutin, catechin, chlorogenic acid, caffeic acid, p -coumaric acid, ferulic acid, DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS [2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid)], TPTZ (2,4,6-tripyridyl-s-triazine) and AAPH (2,2′-azobis (2-methylpropionamidine) dihydrochloride) were purchased from Sigma Chemical Co. (St Louis, MO, USA).

    Techniques: Activity Assay

    Carotenoids content as β-Carotene of cereal milling by-products (dw). The vertical bars represent the SD (n = 3), and values marked by the same letter are not significantly different ( P

    Journal: Journal of Food Science and Technology

    Article Title: Bioactive compounds and antioxidant activities of some cereal milling by-products

    doi: 10.1007/s13197-017-3029-2

    Figure Lengend Snippet: Carotenoids content as β-Carotene of cereal milling by-products (dw). The vertical bars represent the SD (n = 3), and values marked by the same letter are not significantly different ( P

    Article Snippet: 2,2-Diphenyl-1-picrylhydrazyl (DPPH), sodium carbonate, gallic acid, catechin, β-carotene, 2,4,6-tri(2-pyridyl)-s-triazine (TPTZ), 2,2′-azinobis(3-ethylbenothiazoline-6-sulfonic acid) diammonium salt (ABTS+), Folin–Ciocalteu’s reagent, aluminium chloride, FeSO4 , FeCL3 ·6H2 O, sodium nitrite were purchased from Sigma–Aldrich Chemical Co., Denmark.

    Techniques:

    The absorbance (760 nm) obtained for Folin-Ciocalteu assay for polyphenols in different fractions of black tea extract obtained after treatment with PVPP columns containing 0.9, 0.7, and 0.3 g (a), absorbance (760 nm) of gallic acid (100 μ g/mL), vanillin (100 μ g/mL), epigallocatechin gallate (EGCG) (100 μ g/mL), and fresh tea flush (200 μ g/mL) after treatment with PVPP column (0.9 g) for Folin-Ciocalteu assay (b), and absorbance at 280 nm for GA (100 μ g/mL), vanillin (100 μ g/mL), and epigallocatechin gallate (EGCG) (100 μ g/mL) (c). Fraction number “0” is the absorbance obtained for fresh tea flush extract before the PVPP treatment. The values are expressed as Mean ± SD. Number of replicates for each experiment are given in the text.

    Journal: International Journal of Analytical Chemistry

    Article Title: Development of a Rapid and Simple Method to Remove Polyphenols from Plant Extracts

    doi: 10.1155/2017/7230145

    Figure Lengend Snippet: The absorbance (760 nm) obtained for Folin-Ciocalteu assay for polyphenols in different fractions of black tea extract obtained after treatment with PVPP columns containing 0.9, 0.7, and 0.3 g (a), absorbance (760 nm) of gallic acid (100 μ g/mL), vanillin (100 μ g/mL), epigallocatechin gallate (EGCG) (100 μ g/mL), and fresh tea flush (200 μ g/mL) after treatment with PVPP column (0.9 g) for Folin-Ciocalteu assay (b), and absorbance at 280 nm for GA (100 μ g/mL), vanillin (100 μ g/mL), and epigallocatechin gallate (EGCG) (100 μ g/mL) (c). Fraction number “0” is the absorbance obtained for fresh tea flush extract before the PVPP treatment. The values are expressed as Mean ± SD. Number of replicates for each experiment are given in the text.

    Article Snippet: Chemicals and Equipment polyvinylpolypyrrolidone (PVPP), Folin-Ciocalteu reagent, gallic acid (GA), β -hydroxyethyl theophylline, caffeine, epicatechin (EC), (−)-epigallocatechin gallate (EGCG), and 1, 1- diphenyl-2-picrylhydrazyl (DPPH) purchased from Sigma Chemicals, USA.

    Techniques:

    Changes of antioxidant activities during fermentation of TVSB by F. fraxinea . Different letters indicate values that are significantly different by Duncan’s multiple range test at 5% level. TEAC, Trolox equivalent antioxidant capacity. DPPH, 2,2-diphenyl-1-picrylhydrazyl; ABTS, 2,2′-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid; FRAP, ferric reducing antioxidant power. Error bars are the standard deviations of triplicate measurements.

    Journal: Molecules

    Article Title: Changes of Phytochemical Components (Urushiols, Polyphenols, Gallotannins) and Antioxidant Capacity during Fomitella fraxinea–Mediated Fermentation of Toxicodendron vernicifluum Bark

    doi: 10.3390/molecules24040683

    Figure Lengend Snippet: Changes of antioxidant activities during fermentation of TVSB by F. fraxinea . Different letters indicate values that are significantly different by Duncan’s multiple range test at 5% level. TEAC, Trolox equivalent antioxidant capacity. DPPH, 2,2-diphenyl-1-picrylhydrazyl; ABTS, 2,2′-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid; FRAP, ferric reducing antioxidant power. Error bars are the standard deviations of triplicate measurements.

    Article Snippet: Gallic acid, methyl gallate, quercetin, taxifolin, PGG, Folin-Ciocalteu reagent, 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2′-azino -bis(3-ethylbenzothiazoline-6-sulfonic acid), diammonium salt (ABTS), 6-hydroxy-2,5,7,8 -tetramethylchromane-2-carboxylic acid (Trolox), 2,4,6-tri(2-pyridyl)-s -triazine (TPTZ), potassium persulfate, tannic acid, bovine serum albumin (BSA), and sodium dodecyl sulfate (SDS) were purchased from Sigma-Aldrich (St. Louis, MO, USA).

    Techniques:

    Total polyphenol content (TPC) (mg gallic acid equivalents (GAE) 100 g −1 FW), 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), ferric-reducing antioxidant power (FRAP) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) (µmol Trolox 100 g −1 FW) measurements for different raspberry cultivars from different origins; FW: Fresh weight. Results are expressed as mean ± standard deviation of three replicates for each sample ( n = 3). Different letters (a,b,c,d,e) represent statistically significant differences ( p

    Journal: Antioxidants

    Article Title: Authentication of “Adelita” Raspberry Cultivar Based on Physical Properties, Antioxidant Activity and Volatile Profile

    doi: 10.3390/antiox9070593

    Figure Lengend Snippet: Total polyphenol content (TPC) (mg gallic acid equivalents (GAE) 100 g −1 FW), 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), ferric-reducing antioxidant power (FRAP) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) (µmol Trolox 100 g −1 FW) measurements for different raspberry cultivars from different origins; FW: Fresh weight. Results are expressed as mean ± standard deviation of three replicates for each sample ( n = 3). Different letters (a,b,c,d,e) represent statistically significant differences ( p

    Article Snippet: Gallic acid monohydrate, (±)-6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid (Trolox), Folin and Ciocalteu’s phenol reagent (2M), 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,4,6-tris(2-pyridyl)-s-triazine (TPTZ), 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), hexanal, decanal, nonanal, linalool, α-ionone and β-ionone were acquired from Sigma-Aldrich Inc. (St. Louis, MO, USA).

    Techniques: Standard Deviation

    The DPPH free-radical scavenging capacity of six different parts of C. deserticola and the comparisons among sample R1 and reference antioxidants of Trolox and l -Ascorbic acid.

    Journal: Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry

    Article Title: Comparison of the Chemical Profiles and Antioxidant Activities of Different Parts of Cultivated Cistanche deserticola Using Ultra Performance Liquid Chromatography-Quadrupole Time-of-Flight Mass Spectrometry and a 1,1-Diphenyl-2-picrylhydrazyl-Based Assay

    doi: 10.3390/molecules22112011

    Figure Lengend Snippet: The DPPH free-radical scavenging capacity of six different parts of C. deserticola and the comparisons among sample R1 and reference antioxidants of Trolox and l -Ascorbic acid.

    Article Snippet: DPPH, L-ascorbic acid and Trolox were purchased from Sigma-Aldrich (St. Louis, MO, USA).

    Techniques:

    Analysis of flavonoid accumulation in 5 developmental stages of leaves from the  Malus  crabapple cultivars ‘Royalty’ and ‘Flame’. S1, 3 days after budding; S2, 9 days after budding; S3, 15 days after budding; S4, 21 days after budding; S5, 30 days after budding. ( A ) Five leaf developmental stages used for the analysis. ( B ) HPLC analysis of methanol extracts from crabapple leaf. A1, cyanidin 3-O-glucoside; F1, quercetin 3-O-diglucoside; F2, procyanidin dimer; F3, quercetin 3-O-glucoside; F4, quercetin 3-O-glycosidase isomer; F5, avicularin; F6, acetyl quercetin 3-O-glucoside; F7, acetyl quercetin 3-O-glycosidase isomer; F8, avicularin isomer; F9, quercetin 3-O-rhamnoside; F10, phloridzin. ( C ) The total anthocyanins content and total flavonols content in 5 developmental stages of leaves of the two crabapple cultivars. Error bars indicate the standard error of the mean ± SE of three replicate measurements. Different letters above the bars indicate significantly different values ( P

    Journal: Scientific Reports

    Article Title: The Balance of Expression of Dihydroflavonol 4-reductase and Flavonol Synthase Regulates Flavonoid Biosynthesis and Red Foliage Coloration in Crabapples

    doi: 10.1038/srep12228

    Figure Lengend Snippet: Analysis of flavonoid accumulation in 5 developmental stages of leaves from the Malus crabapple cultivars ‘Royalty’ and ‘Flame’. S1, 3 days after budding; S2, 9 days after budding; S3, 15 days after budding; S4, 21 days after budding; S5, 30 days after budding. ( A ) Five leaf developmental stages used for the analysis. ( B ) HPLC analysis of methanol extracts from crabapple leaf. A1, cyanidin 3-O-glucoside; F1, quercetin 3-O-diglucoside; F2, procyanidin dimer; F3, quercetin 3-O-glucoside; F4, quercetin 3-O-glycosidase isomer; F5, avicularin; F6, acetyl quercetin 3-O-glucoside; F7, acetyl quercetin 3-O-glycosidase isomer; F8, avicularin isomer; F9, quercetin 3-O-rhamnoside; F10, phloridzin. ( C ) The total anthocyanins content and total flavonols content in 5 developmental stages of leaves of the two crabapple cultivars. Error bars indicate the standard error of the mean ± SE of three replicate measurements. Different letters above the bars indicate significantly different values ( P

    Article Snippet: Cyanidin-3-O-glucoside, quercetin-3-O-glucoside, avicularin, phloridzin, quercetin (Sigma-Aldrich, Germany), Procyanidin B2 (Sigma-Aldrich, UK) was used as standards.

    Techniques: High Performance Liquid Chromatography

    Loading plot of principal component analysis (PCA) from the variation observed of six buckwheat samples. FP, free phenolic; FF, free flavonoid; BP, bound phenolic; BF, bound flavonoid; GA, gallic acid; HA, 4-hydroxybenzoic acid; CA, 5-caffeoylquinic acid; SA, syringic acid; DIM, dihydromyricetin; RUT, rutin; FA, ferulic acid; KAE-3-RUT, kaempferol-3-O-rutinoside; QUE, quercetin; API, apigenin; KAE, kaempferol; DPPH, 1,1-diphenyl-2-picrylhydrazyl; ABTS + , 2, 2-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt; FRAP, ferric reducing/antioxidant power; OH•, hydroxyl radical.

    Journal: Antioxidants

    Article Title: Free and Bound Phenolics of Buckwheat Varieties: HPLC Characterization, Antioxidant Activity, and Inhibitory Potency towards α-Glucosidase with Molecular Docking Analysis

    doi: 10.3390/antiox8120606

    Figure Lengend Snippet: Loading plot of principal component analysis (PCA) from the variation observed of six buckwheat samples. FP, free phenolic; FF, free flavonoid; BP, bound phenolic; BF, bound flavonoid; GA, gallic acid; HA, 4-hydroxybenzoic acid; CA, 5-caffeoylquinic acid; SA, syringic acid; DIM, dihydromyricetin; RUT, rutin; FA, ferulic acid; KAE-3-RUT, kaempferol-3-O-rutinoside; QUE, quercetin; API, apigenin; KAE, kaempferol; DPPH, 1,1-diphenyl-2-picrylhydrazyl; ABTS + , 2, 2-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt; FRAP, ferric reducing/antioxidant power; OH•, hydroxyl radical.

    Article Snippet: ABTS (2-azino-bis [3-ethylbenzothiazoline-6-sulfonic acid] diammonium salt), DPPH (1,1-diphenyl-2-picrylhydrazyl), TPTZ (2,4,6-tris(2-pyridyl]-s-triazine), and Trolox were purchased from Sigma-Aldrich Chemical Co., Ltd. (St. Louis, MO, USA).

    Techniques:

    Kinetics of caffeine, gallic acid and catechin extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )

    Journal: Nutrition Journal

    Article Title: Extraction Kinetics of phytochemicals and antioxidant activity during black tea (Camellia sinensis L.) brewing

    doi: 10.1186/s12937-015-0060-x

    Figure Lengend Snippet: Kinetics of caffeine, gallic acid and catechin extraction from CTC tea leaves ( a ) and kinetics of polyphenol and flavonoid extraction from CTC tea leaves ( b )

    Article Snippet: Reagents and chemicals HPLC grade acetonitrile was purchased from BDH (BDH Chemicals Ltd. Poole, England). β-hydroxyethyltheophylline, caffeine, gallic acid, epicatechin, (−)-epigallocatechin gallate, Folin Ciocalteu reagent, 1,1-Diphenyl-2-picrylhydrazyl (DPPH) and aluminium chloride were purchased from Sigma Chemicals, USA.

    Techniques: