Chủ đề : Antioxidant activity

Biochemical compositions, antioxidant activity, and in vitro antibacterial activity of extract from wild bitter melon (Momordica charantia var. abbreviata Ser.)

tailieu.vn Xem trực tuyến Tải xuống

Biochemical compositions, antioxidant activity, and in vitro antibacterial activity of extract from wild bitter melon. (Momordica charantia var. abbreviata Ser.). Wild bitter melon (Momordica charantia var. abbreviata Ser.) is a type of vine that grows wildly in the mountains and plains in Vietnam. The main use parts of the tree are fruit, stem, and leaf that can be eaten as...

Evaluation of the antioxidant activity and dosage of polyphenols in aqueous, hydroethanolic and hexane extracts of the bark of Spathodea campanulata P. Beauv. (Bignoniaceae)

tailieu.vn Xem trực tuyến Tải xuống

Genome sequencing provides insights into the evolution and antioxidant activity of Chinese bayberry

tailieu.vn Xem trực tuyến Tải xuống

Background: Chinese bayberry (Myrica rubra Sieb. Elucidating the genetic basis of the biosynthesis of active antioxidant compounds in bayberry is fundamental for genetic improvement of bayberry and industrial applications of the fruit ’ s antioxidant components. in China, and the transcriptome dynamics in the course of fruit development.. Most of the M. rubra genes in the antioxidant signaling pathways had...

Genome-wide localization of the polyphenol quercetin in human monocytes

tailieu.vn Xem trực tuyến Tải xuống

Genome-wide localization of the. Background: Quercetin is a polyphenol of great interest given its antioxidant activity and involvement in the immune response. We demonstrate that upon binding to DNA or genome-associated proteins, quercetin acts as a cis-regulatory transcription factor for the expression of genes that are involved in the cell cycle, differentiation and development.. Polyphenols in gen- eral, and quercetin...

Anti-inflammatory and antioxidant activities of Symplocos cochinchinensis (Lour.) Moore ssp. Laurina (Retz.) nooteb leaf extract

tailieu.vn Xem trực tuyến Tải xuống

Anti-inflammatory and Antioxidant Activities of Symplocos cochinchinensis (Lour.) Moore ssp. Leaf Extract. The purpose of this study was to determine some phytochemicals, assess in vitro anti-inflammatory and antioxidant capacities of S. cochinchinensis leaf extract to provide information for further research. cochinchinensis leaf extract exhibited anti-inflammatory effect via in vitro protein denaturation inhibition, hemolysis inhibition by heat and hypotonicity with IC...

Secondary metabolites and in vitro biological activities of fractions from stemona collinsae craib root extract

tailieu.vn Xem trực tuyến Tải xuống

SECONDARY METABOLITES AND IN VITRO BIOLOGICAL ACTIVITIES OF FRACTIONS FROM Stemona collinsae Craib ROOT EXTRACT. Van Hoang Lan, Le Thi Phuong Hoa * Abstract: Stemona collinsae Craib is a medicinal plant, which has been reported previously with various biological properties such as insecticidal, anticancer, antioxidant and antifungal activities. collinsae roots was performed with four fractions, namely n-hexane, ethyl acetate, butanol...

Association mapping for total polyphenol content, total flavonoid content and antioxidant activity in barley

tailieu.vn Xem trực tuyến Tải xuống

Results: A genome-wide association study (GWAS) was conducted for total phenolic content (TPC), total flavonoid content (FLC) and antioxidant activity (AOA) in 67 cultivated and 156 Tibetan wild barley genotypes. The markers bPb-0572 and bPb-4531 were identified as the major QTLs controlling phenolic compounds in Tibetan wild barley. Conclusions: GWAS is an efficient tool for exploring the genetic architecture of...

Regulation of antioxidant activity in maize (Zea mays L.) by exogenous application of sulfur under saline conditions

tailieu.vn Xem trực tuyến Tải xuống

Mukwevho et al., 2014. Hence, appropriate concentrations of sulfur are needed for proper activity of various antioxidants involved in scavenging the reactive oxygen species produced under salt-stress conditions.. Application of sulfur is very helpful for improving maize productivity, because maize responds quickly to sulfur fertilization (Riffat and Ahmad, 2018b). Regulation of antioxidant activity in maize (Zea mays L.) by exogenous...

Synthesis, in vitro DNA interactions, cytotoxicities, antioxidative activities, and topoisomerase inhibition potentials of Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) complexes with azo-oxime ligands

tailieu.vn Xem trực tuyến Tải xuống

DNA binding abilities of the complexes were revealed using a UV-Vis spectrophotometer with the absorption titration and competitive binding techniques. The results obtained from the cytotoxicity experiments are especially promising for further research, which must be carried out for the evaluation of the studied complexes as anticancer drugs.. 2 This is also true for metal-containing drugs because of the metal-binding...

Biological study on novel coumarinyl 1,3,4-oxadiazoles

tailieu.vn Xem trực tuyến Tải xuống

Abstract: Coumarinyl 1,3,4-oxadiazoles were synthesized from Schiff bases and acetic anhydride. Dolman et al. Dobrota et al. Our intention was to synthesize novel 1,3,4-oxadiazoles from coumarinyl Schiff bases and to investigate them in terms of their antibacterial, antifungal, and antiaflatoxigenic activity. Coumarinyl 1,3,4-oxadiazoles were synthesized from corresponding Schiff bases (Figure 1) and their structures were confirmed by 1 H NMR,...

The first synthesis and antioxidant and anticholinergic activities of 1-(4,5-dihydroxybenzyl)pyrrolidin-2-one derivative bromophenols including natural products

tailieu.vn Xem trực tuyến Tải xuống

In addition, the reducing power of the novel bromophenols was investigated by Cu 2. Moreover, novel bromophenols were tested against cholinergic enzymes including acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) enzymes in the last part of this study. The presented novel bromophenols showed Ki values in the range of nM against AChE and nM against BChE.. 25 The imbalance between the antioxidant...

Synthesis, characterization, and evaluation of antioxidant activity of new γ- and δ-imino esters

tailieu.vn Xem trực tuyến Tải xuống

2.54 (2H, m, –CH 2. 2.82 (2H, t, J = 7.1 Hz, –CH 2. 6.53 (1H, dd, J = 3.5 and 1.8 Hz, furan –CH. 6.64 (1H, d, J = 8.9 Hz, furan –CH. 25.0 (–CH 2. 31.3 (–CH 2. 114.3 (furan –CH. 114.8 (furan –CH. 144.9 (furan –CH. 156.1 (furan –CH. 1 H NMR (500 MHz, CDCl 3 ,...

Synthesis of E-stilbene azomethines as potent antimicrobial and antioxidant agents

tailieu.vn Xem trực tuyến Tải xuống

Abstract: A series of new extensively conjugated E -stilbene azomethines (5a–5h) were synthesized and screened for their antioxidant and antimicrobial activity. Additionally, compounds 5a–5h were also evaluated for antioxidant potential using DPPH free radical scavenging and ferric thiocyanate (FTC) assays. The structure elucidation of the synthesized compounds was carried out by UV-Vis, FT-IR, 1 H NMR, 13 C NMR, and...

Naphthoxazoles and heterobenzoxazoles: Cholinesterase inhibition and antioxidant activity

tailieu.vn Xem trực tuyến Tải xuống

Naphthoxazoles and heterobenzoxazoles: cholinesterase inhibition and antioxidant activity. In this study we evaluated cholinesterase inhibitory and antioxidant activity of seven oxazole derivatives. They have also been tested for antioxidant activity, but never for cholinesterase inhibitory activity. Among the tested oxazole derivatives, fused heterobenzoxazole compounds with pyridine and thiophene moi- ety, oxazolo[5,4- h ]isoquinoline, thieno[2’,3’:5,6]benzo[1,2-d ]oxazole, and thieno[3’,2’:5,6]benzo[1,2-d ]oxazole, showed the...

Antioxidant properties of water-soluble phthalocyanines containing quinoline 5-sulfonic acid groups

tailieu.vn Xem trực tuyến Tải xuống

doi:10.3906/kim-1904-12 h t t p. Abstract: In the present study, the antioxidant properties of peripherally and nonperipherally water-soluble tetra (quinoline 5-sulfonic acid) substituted metal-free (1, 2), Zn(II) (3, 4), Co(II) (5, 6), and Mn(III)Cl (7, 8) phthalocyanine (Pc) derivatives were reported. In order to determine the antioxidant properties of the Pc compounds, three different commonly known antioxidant methods were used:...

Magnetite nanoparticles−based hydroxyl radical scavenging activity assay of antioxidants using N, N-dimethyl-p-phenylenediamine probe

tailieu.vn Xem trực tuyến Tải xuống

doi:10.3906/kim-2006-9. With the advancement of nanoscience, many new methods are on the rise due to extraordinary physico-chemical properties of nanoparticles, such as large surface-to-volume ratio for enhanced catalysis and surface plasmon resonance absorption giving rise to high sensitivity.. With the development of nanotechnology, nanoparticles have found numerous applications in science, health, and industries. In the presence of antioxidants. causing a...

Cytotoxic and apoptotic potential of some coumarin and 2-amino-3-carbonitrile selenophene derivatives in prostate cancer

tailieu.vn Xem trực tuyến Tải xuống

doi:10.3906/kim-2008-56. It ranks second among the diseases that cause human deaths in the world. In 2017, Domracheva et al. In 2020, Erşatır et al.. synthesized 8 new coumarin-selenophene hybrid compounds and investigated the anticancer activities of these compounds and coumarins with starting compounds in the MCF-7 breast cancer cell line. The prepared compounds are screened for their anticancer activity against...

Phenolic compounds, essential oil composition, and antioxidant activity of Angelica purpurascens (Avé-Lall.) Gill

tailieu.vn Xem trực tuyến Tải xuống

doi:10.3906/kim-2101-28. Phenolic compounds, essential oil composition, and antioxidant activity of Angelica pur- purascens (Avé-Lall.) Gill. The most interesting feature of the family is the high chemical diversity of many members, including different aromatic chemicals in different organs such as fruits, flowers, leaves, roots, and stems. The chemical diversity in the underground and aboveground parts of the plant is so different...

GC-MS analyses and bioactivities of essential oil obtained from the roots of Chrysopogon zizanioides (L.) Roberty cultivated in Giresun, Turkey

tailieu.vn Xem trực tuyến Tải xuống

GC-MS analyses and bioactivities of essential oil obtained from the roots of Chrysopogon zizanioides (L.) Roberty cultivated in Giresun, Turkey. According to the literature, EOs can be obtained from about 3000 plant species and 300 of the EOs have commercial sense [2].. The essential oil of Chrysopogon zizanioides (L.) Roberty (CEO) is commonly defined as tranquility oil and has significant...

Influence of different drying methods and cold storage treatments on the postharvest quality and nutritional properties of P. ostreatus mushroom

tailieu.vn Xem trực tuyến Tải xuống

The production and consumption of edible mushrooms have increased greatly in recent times all over the world (Royse et al., 2017). Moreover, mushroom proteins are of high quality, and they contain all essential amino acids required by humans (Kakon et al., 2012). Barros et al.. In addition, mushrooms are a natural source for functional foods or nutraceuticals due to their...