chemistry and antioxidant activity of carotenoids

... or rice bran, and a limited number of studies have reported the antioxidant activity of black rice (Zhang et al., 2010) The concentration of anthocyanins as well as antioxidant activity is different ... more complete analyses of anthocyanin content and antioxidant activity of diverse varieties of black rice are needed Knowing the antioxidant activity of different black rice genotypes will give ... Anthocyanin Content, and Antioxidant Activity of Anthocynins Extracted from the Seeds of Black Rice Accessions Phan Thi Thuy 1 , Nguyen Quoc Trung 2 and Do Thi Huong 1 1 Faculty of Agronomy, Vietnam

Ngày tải lên: 09/01/2020, 18:44

... determination of total antioxidant activity of each sample were performed Data expression Yields of collagen and antioxidant activity were presented as mean ± S.E RESULTS Yield of collagen The yields of ... (11.88–12.6%) Degrees of antioxidant activity varied with type of enzyme Collagen hydrolyzed by alcalase and papain possessed the antioxidant activity higher than bromelain Antioxidant activity of collagen ... molecular weight peptides and increased the antioxidant activity Degree of hydrolysis also affects antioxidant activity and it depends on different enzymes and the way for use of enzymes such as single

Ngày tải lên: 13/01/2020, 14:56

... Quercetin equivalent (QE)/gm of plant dried extract Antioxidant activity of various extracts of Ficus roxburghii Wall Analysis of the antioxidant activity of various extracts of Ficus roxburghii was ... methanol, ethanol, hexane, and chloroform extracts of both leaves and fruits Lignin and amino acids were present in methanol, chloroform and hexane extracts of both leaves and fruits but were absent ... Difference of Solvent Polarity to Qualitative and Quantitative Phytochemical Contents and Antioxidant Activity of Ficus roxburghii Wall Leaves and Fruits Extracts Pushpa Ruwali* and Sarita

Ngày tải lên: 14/01/2020, 13:43

... in phenolic and has good antioxidant activity The effects of simulated gastric (SGF) and intestinal fluid (SIF) digestion on the contents, composition, and antioxidant activities of the phenolic ... composition and content of phenolic profiles, and thus change their antioxidant activity [21, 22] After simulated digestion in  vitro, previous studies proved that the content of phenolic substances and ... activities of lychee pericarp Therefore, the aim of the present study is to compare the influence of SGF and SIF digestion on the composition and content of phenolic substances of six varieties of lychee

Ngày tải lên: 29/05/2020, 12:25

... capacities of antioxidant compounds and led to the decrease in the scavenging capacity of total extracts Figure 5 ABTS radical scavenging activity of T indica vvater extracts and Trolox Standard ... Hai Phong and Sai Gon) Moreover, the antioxidant capacity of these extracts was determined using the DPPH and ABTS radical scavenging activity MATERIALS AND METHODS Sample collectỉon and preparation ... against a blank of DMSO A serial dilution (0.0125 to 0.4 mg/mL) of gallic acid was prepared to construct a calibration curve of Standard reference The TPC of the gallic acid standards was analyzed

Ngày tải lên: 26/12/2022, 23:24

... Institute of Chemistry Vietnam Academy of Science and Technology Scientific Supervisors: 1 Dr Duong Ngoc Tu Institute of Chemistry - Vietnam Academy of Science and Technology 2 Ass Prof Dr Duong ... Institute of Chemistry (Vietnam Academy of Science and Technology) and the Institute of Biopharmaceuticals and Biotechnology (Heirich-Heine General University Duesseldorf, Germany) on the study of flora ... temperature of 45 ° C, obtained 240 g of residue of methanol The residue of methanol is added with water and extracted with an increasing solvent of n-hexane and ethyl acetate After removal of the

Ngày tải lên: 09/01/2020, 14:59

... Antihyperglycemic activity of Gymnema sylvestre (57.68%) and Stevia rebaudiana extracts (54.93%) was significantly higher than those of other extracts The inhibition of α-amylase and α-glucosidase activity of ... 1 University of Science and Technology, The University of Danang, Vietnam 2 VN-UK Institute for Research and Executive Education, The University of Danang, Vietnam 3 Institute of Chemistry, VAST, ... extracts exhibited relatively low antioxidant activity with the concentration of a sample required for 50% scavenging of the DPPH free radical of 115.88  1.16 µg/mL and 160.27  2.01 µg/mL compared

Ngày tải lên: 13/01/2020, 22:07

... of the potential sources of new drugs (Antunes et al., 2006, Cowan, 1999) The aim of this study was to find out the in vitro antioxidant activity and antibacterial activity of leaf extract of ... screening of antioxidant activity Flavonoids, including flavones, flavanols and condensed tannins, are plant secondary metabolites, the antioxidant activity of which depends on the presence of free ... Bozin, B., N Mimica-Dukic, I Samojlik and E.A Jovin, 2007 Antimicrobial and antioxidant properties of rosemary and sage (Rosmarinus officinalis L and Salvia officinalis L., Lamiaceae) essential

Ngày tải lên: 14/01/2020, 16:20

... shaked and took absorbance at 510 nm Total flavonoids were calcu-lated in mg CE per g dry matter Determination of antioxidant activity Antioxidant activity of different extracts of various parts of ... anti-viral and antioxidant properties In this study we deter-mined the antioxidant and antibacterial potential profile of all major parts extracts of the C papaya in seven com-mon organic and aqueous ... flavonoids and antioxidant potential profile of extracts of all major parts of the C papaya with seven major solvents i.e water, ethanol, methanol, n‑butanol, dichloromethane, ethyl acetate, and n‑hexane

Ngày tải lên: 29/05/2020, 14:07

... 1000 μg/mL Then 1 mL of each standard solution was removed and transferred to a 20 mL volumetric flask, followed by the addition of 1 mL of 5 % phenol solution and 5 mL of 98 % concentrated sulfuric ... that the extraction time of 30 min gave the highest PS content 3.2 Antioxidant activity investigation Figure 8 presents the antioxidant activity of ascorbic acid (a) and the extract (b) at different ... Xie J., Wang P., and Su W - Mechanochemical-assisted extraction and antioxidant activity of polysaccharides from Ganoderma lucidum spores, International Journal of Food Science and Technology

Ngày tải lên: 28/06/2021, 15:47

... scavenge free radicals and reactive oxygen species  orange juice  mandarin juice → reduce in colon and lung cancer 2 Experiment and result: → study the antioxidant activity of hesperidin Trang ... using yeast cells4 Result Table 2 Survival of SOD Proficient and Deficient S cerevisiae Strains Treated and Untreated with the Antioxidant Hesperidin and/or the Stressing Agents Paraquat or Hydrogen ... by hesperidin (■) and trolox () Trang 10III Methods & results: using yeast cells. Evaluation of antioxidant capacity using yeast cells 2 Advantages of method . testing of various products

Ngày tải lên: 10/06/2022, 21:23

... values of antioxidant and phytochemical constituents Correlation analysis for phytochemical contents with IC50 values of radical scavenging and/or antioxidant ability of extract of LP and its ... chloroform and 1 mlβ-carotene solution was mixed with 20 mg of purified linoleic acid and 200 mg of Tween 40 emulsifiers Chloroform was then evaporated under a gentle stream of nitrogen, and the ... peroxidation and incubated for 30 min Then 1.5 ml of 3.5 M acetic acid (pH adjusted to 3.5 with NaOH) and 1.5 ml of 0.06 M TBA in 0.04 M sodium dodecyl sulphate and 0.05 ml of 1.2 M of TCA was added, and

Ngày tải lên: 02/11/2022, 08:53

... indicator of its potential antioxidant activity Hence this study presumed that methanol extract of L indica may have high amount of antioxidant property which was comparable to that of synthetic antioxidant ... ascorbic acid as standard antioxidant Methanol extract exhibited higher antioxidant activity than the ethanol and aqueous extract (Table 2) 3.7 Effect of L indica leaf methanol, ethanol and aqueous ... role of free radicals in biological systems Many secondary metabolites like phenols, polyphenols and flavonoid serve as sources of antioxidants and do scavenging activity 22 ROS readily combine and

Ngày tải lên: 04/12/2022, 14:56

... waveforms and kinematic profiles of control subjects with the profiles of each spinal cord injury subject with and without man-ual assistance [33-35] where x i and y i are two series of data, and ... Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA, 3 Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA and 4 Department of Physical ... integrity of the data, and then rectified and low-pass filtered (25 Hz) Kinematic data were low pass filtered at 6 Hz [32] Averaged EMG and kinematic profiles were time normalized to the per-centage of

Ngày tải lên: 19/06/2014, 10:20

... continuation of our phytochemical and antibacterial studies of the Algerian Sahara medicinal plants [7–11], we report here the findings of our studies on the composition and antimicrobial activity of ... formatted PDF and full text (HTML) versions will be made available soon. Chemical composition and antibacterial activity of the essential oils from Launaea resedifolia L. Organic and Medicinal Chemistry ... results of this study may be considered as the first report on the composition of the essential oils of this endemic species. 2.6. Antimicrobial activity The quantification of antibacterial activity

Ngày tải lên: 20/06/2014, 20:20

... percentage inhibition of LDL oxidation for the standards like BHA and AA was also determined and compared with those of the synthesised compounds (Fig 3) The antioxidant activity of BHA and AA was still ... SD (n = 3) Evaluation of In Vitro Antioxidant Activity 90 antioxidant activity of 5H-dibenz[b,f]azepine and its derivatives on human LDL oxidation and lipid peroxidation activity in the liposome ... mass spectroscopy and elemental analysis The IR spectra of compounds (e) and (f) showed the absent of the N–H absorption band at 3400 cm–1 and the presence of the C=O stretching band at 1600 cm–1,...

Ngày tải lên: 07/08/2014, 14:20

... hepatic (A) CAT activity; (B) SOD activity; (C) GPx activity; (D) protein expression of CAT, SOD and GPx; (E) representative Western Blot images of the protein expressions of CAT, SOD and GPx in STZ-diabetic ... Effects of metformin, baicalin and metformin + baicalin on the hepatic (A) SOD activity; (B) CAT activity; (C) GPx activity; (D) quantifications of the protein expressions of CAT, SOD and GPx ... (GPx) and catalase (CAT) are other antioxidant enzymes that catalyze the conversion of hydrogen peroxide to water Decreases in expression, and in some instances the inactivity of each of these antioxidant...

Ngày tải lên: 12/09/2015, 10:58

... Water-solubility, antioxidant activity and cytochrome C binding of four families of exohedral adducts of C60 and C70 Org Biomol Chem 5:3599–3613 Xiao L, Takada H, Maeda K, Haramoto M, Miwa N (2005) Antioxidant ... Medicinal Chemistry and Pharmacological Potential of Fullerenes and Carbon Nanotubes CARBON MATERIALS: CHEMISTRY AND PHYSICS A comprehensive book series which encompasses the complete coverage of carbon ... with diameters in the range of 0.5–1.5 nm and 2–100 nm and lengths in the range of 20–1,000 nm, and 1–50 μm for SWNTs and MWNTs, respectively 2 Biomedical Applications of Functionalised Carbon...

Ngày tải lên: 17/02/2014, 05:20

... bonds between NH of Thr5 and CO of Arg2, as well as NH of Arg2 and CO of Thr5 Structure of cyclic hexapeptides – cYT peptide The NMR data of the cYT peptide were indicative of its flexible nature ... intensity of ROE cross-peaks, and were assigned as strong, medium and weak ˚ represent the family Based on ROE violation > 0.2 A and allowed values of /, w in the Ramachandran map, only one family of ... percentage inhibition of peptide-treated cells and expressed as the mean of three independent experiments activity of 40% at 100 lM concentration Both linear and cyclic ER peptides (lER and cER) showed...

Ngày tải lên: 19/02/2014, 13:20