Active antioxidant

Carotenoids are a group of 40-carbon isoprenoids with high lipid solubility, widely found in fruits, vegetables, etc. They have an unsaturated structure with strong antioxidant activity that helps prevent low-density lipoprotein oxidation and protect cells from free radicals.

8p viwalton 02-07-2024 2 1   Download

The entire plants of Lycopodiella cernua L. are utilized in Vietnam and China as traditional herbal medicine due to their anti-inflammatory activity and neuroprotective effect. In this current research, four dihydrobenzofuran neolignan derivatives (1–4) have been purified from the ethanol extract of L. cernua.

7p viwalton 02-07-2024 1 1   Download

Lichens, formed by the symbiosis of fungi and algae or cyanobacteria, are increasingly recognized for their potential medicinal properties, including their potential to treat type 2 diabetes. Many studies have shown that the bioactive metabolites of lichens originate from their fungal partners. This study isolated the mycobiont from a Graphis lichen sample and investigated the antioxidant and α-glucosidase inhibitory activity of its ethyl acetate extract.

10p visergeyne 18-06-2024 2 0   Download

The study on essential oils of various plantparts and their biological activities continues to be an important area of research and developmen. In the continuation of our current research on the identification of bioactive substances from plants of North East India.

21p viamancio 04-06-2024 2 0   Download

This study is the first report on antioxidant activities and chemical composition of S. cambodianum Baill. ethanolic leaf extract. The results showed that ethanolic extract had potent in vitro antioxidant activities in DPPH, ABTS•+ assays (the low concentrations of IC50 were 19.51 ± 0.78 μg/mL and 4.89 ± 0.07 μg/mL, respectively), and in RP, TAC methods (the Abs0.5 were 20.80 ± 0.26 μg/mL and 36.15 ± 1.03 μg/mL).

7p dianmotminh02 03-05-2024 5 1   Download

Isaria cicadae, currently identified as Paecilomyces cicadae (Miq.) Samson (Cordycipitaceae, Hypocreales, Ascomycetes), is a parasitic fungus on cicadas and is considered a folk medicine in traditional medicine. In this research, the antioxidant activity of some extracts from the biomass and fruit bodies of Isaria cicadae F0004 isolated in Vietnam was investigated.

13p dianmotminh02 03-05-2024 4 1   Download

Seven known compounds, including two neolignans, four lignans, and one flavane were isolated from the methanol extract of Pandanus tonkinenis fruits. Their structures were determined to be ficusal, vladinol F, medioresinol, syringaresinol, lariciresinol, secoisolariciresinol, and luteoliflavan by analysis of MS and NMR data as well as by comparison of their spectral data with those reported in the literature.

7p dianmotminh02 03-05-2024 3 1   Download

The biological activities of E. ciliata essential oils (Ec EOs) in Vietnam have yet to be thoroughly studied and have received less attention than other species of genus Elsholtzia in the world. In this study, we evaluated the antioxidant, antimicrobial, and anticancer of Ec EOs and examined their chemical compositions. Fresh leaves of E. ciliata were hydro-distilled to yield essential oil of 0.82% dry weight, respectively.

12p dianmotminh02 03-05-2024 4 1   Download

Biodegradable “green” and safe substitutes to minimize environmental and health risks are drawing extensive attention for research interest. This research aims to create a water-soluble cationic starch-grafted biodegradable polymer that can be used as a flocculant. As polymers are strong molecules that carry charges, they are effective flocculants. Saturated polymer chains do not change the pH value on adding to wastewater.

8p dianmotminh02 03-05-2024 3 1   Download

This study aimed to assess the antimicrobial and antioxidant activities of 61 marine fungal strains isolated from 34 samples collected in the research journey of the Akademik Oparin vessel in the North Sea of Vietnam in 2021. Of these, 23 were from sponges, 21 from seaweeds, 15 from sediments, and only 2 from seawater.

13p dianmotminh02 03-05-2024 4 1   Download

In order to explore the importance of the Antheroporum genus in pharmaceutical applications, two bioactivities of A. harmandii plant extracts have been evaluated in this study. Antimicrobial and antioxidant activities of A. harmandii extracts will provide evidences for further chemical composition studies to detect new bioactive compounds from this species.

9p dianmotminh02 03-05-2024 4 1   Download

Alpinia vietnamica H.Ð. Tran, Luu & Skornick was identified as a new species in 2019, which is widely distributed in Thua Thien Hue, Quang Nam, and Kon Tum provinces, Vietnam. The current study wishes to report phytochemical investigation, and the biological activities (cytotoxic, antioxidative, and α-glucosidase inhibitory) of isolated compounds.

5p dianmotminh02 03-05-2024 8 1   Download

The methanol extracts as well as some compounds from this plant exhibited anti-inflammatory, antimicrobial activity, antioxidant, hepatoprotective and anti-cancer effect, and antiosteoporotic. On going to search for bioactive components from the Vietnamese plant, this paper reported the isolation of seven phenolic compounds including one new from the aerial parts of A. ilicifolius. The cytotoxic activity of the isolates against two cancer cell lines (HepG2 and SK-LU1) were also screened and reported herein.

5p dianmotminh02 03-05-2024 6 1   Download

The essential oils were also tested for their antioxidant, anti-imflammatory, antimicrobial and cytotoxic activities. The HD essential oil sample showed inhibitory activity against 6/8 tested microorganisms, i.e., Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Bacillus subtillis, Candida albicans, and Saccharomyces cerevisiae. The MHD and EHD exhibited the inhibitory activity against three strains E. coli, A. niger and F. oxysporum. The UHD inhibited E. coli and F. oxysporum.

9p dianmotminh02 03-05-2024 8 1   Download

Zoanthid is a potential natural resource with many biological activities, such as antioxidant, antiviral, antiinflammatory, and cytotoxic activity. Therefore, this study aimed to evaluate the antioxidant activity of 70% ethanol crude extract and dichloromethane fraction from Zoanthus vietnamensis. The total polyphenol content of ethanol and dichloromethane extracts were 19.36 ± 1.37 and 24.95 ± 0.63 mg GAE/g extract, respectively.

9p dianmotminh02 03-05-2024 4 1   Download

Flavonoids are a diverse group of natural compounds extensively studied in various research articles. They are widely distributed in the plant kingdom and exhibit various biological activities, including antioxidant, antiinflammatory, anticancer, antiviral, and antimicrobial effects. The genus Knema Lour., which contains many species in Southeast Asia, has been traditionally used to treat various ailments. The current review aims to provide a comprehensive update on the isolation of flavonoids and other secondary metabolites from the genus Knema Lour. between 1978 and 2022.

15p dianmotminh02 03-05-2024 5 2   Download

In this work, gold nanorods (AuNRs) with well-controlled aspect ratios were prepared using a modified seedgrowth method and covered by TiO2 layers through the hydrothermal reaction to improve stability. Integrating TiO2 with plasmonic rod-like gold nanoparticles could enhance their photo activity by the local surface plasmon resonance (LSPR) effect. AuNRs aspect ratios were controlled by varying the amount of seed solution, reducing agents, surfactant (CTAB), and titanium (IV) but oxide.

7p dianmotminh02 03-05-2024 3 2   Download

Photocatalytic degradation proficiency was studied for bromothymol blue dye. Phytochemicals-coated Nickel Oxide nanoparticles demonstrated antibacterial properties against bacteria (gram negative strain of E. coli, Pseudomonas spp. and gram positive strain of Bacillus spp.) by showing highest zone of inhibition (19 mm, 22 mm, 15 mm).the antioxidant activity of the synthesized nanoparticles were also examined and the result show that the fabricated nanoparticles exhibited significant radical scavenging activity.

10p dianmotminh02 03-05-2024 5 2   Download

Ebook "Emerging trends in chemical sciences" provides readers with contents including: glucagon by the gut peptide, GLP-1 - controversies, challenges and future directions; analysis of non-conducting tantalite minerals by glow discharge optical emission spectrometry; chemical composition and antioxidant activity of tagetes minuta L. in Eastern Cape, South Africa;...

418p tracanhphuonghoa1007 22-04-2024 5 2   Download

This study was designed to extract a high yield of polysaccharides from the M. smilacifolium trunk and characterize it. As a result, the maximum yield of the polysaccharides of 5.13 ± 0.05% was obtained with an extraction time of three hours, extraction temperature of 100 oC, the ratio of water to sample of 1:50 as extraction solution, extraction number of times 3, and the ratio of ethanol to extract volume 5:1 (v/v).

9p viritesh 02-04-2024 6 1   Download