Biological activity of natural active compounds

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 9 3   Download

The objectives of the thesis: Study on chemical composition of Paramignya trimera and Morinda longissima species. Evaluation of hepatoprotective and anti-HBV activities of extracts and pure compounds from stems and roots of Xao tam phan (Paramignya trimera (Oliv.) Guill.) and Nho dong (Morinda longissima Y.Z. Ruan).

22p extraenglish 24-05-2021 28 3   Download

The aim of the thesis: Study on chemical composition of starfish Acanthaster planci of Vietnam, synthesizing hydroxyl and oxime derivatives from a steroid isolated from this starfish and assessing biological activity of isolated and synthesized compounds.

26p extraenglish 24-05-2021 20 4   Download

The research objectives of the thesis: Isolate and determine the chemical structure of compounds from C. candicans and C. macrophylla species collected in Vietnam. Assessment of toxic activity on some cancer cell lines: liver (Hep-G2), lung (Lu-1) and breast (MCF-7) of isolated clean compounds. Researching the chemical composition of C. candicans and C. macrophylla essential oils

29p extraenglish 24-05-2021 16 4   Download

With the aim of searching for bioactive compounds from plants of the genus Garcinia in order to contribute to the scientific basis for further research in the pharmaceutical field, the thesis focuses on studying two species of the genus Garcinia is Garcinia cowa and Garcinia hanburyi.

27p capheviahe27 23-02-2021 12 4   Download

The objectives of the thesis: Study on chemical constituents of two species Markhamia stipulata var. canaense V.S. Dang and Stereospermum binhchaunesis V.S. Dang; evaluation of biological activities of isolated compounds to find potential compounds.

27p capheviahe27 23-02-2021 14 3   Download

Research purposes of the dissertation: Studying on Dalbergia tonkinensis Prain systematicly and fully about: plants (microsurgery, gene sequences), chemical compositions and biological activity.

27p capheviahe27 23-02-2021 12 2   Download

Study on chemical composition of starfish Acanthaster planci of Vietnam, synthesizing hydroxyl and oxime derivatives from a steroid isolated from this starfish and assessing biological activity of isolated and synthesized compounds.

26p capheviahe26 25-01-2021 10 4   Download

The methanol extract of P. palatiferum (Nees) Radlk. leaves exhibited a moderate inhibitory effect on the L-3,4-dihydroxyphenylalanine (L-DOPA) oxidase activity of tyrosinase in the melanin biosynthesis pathway. Further study may lead to new bioactive compounds from ethyl acetate and n-hexane fractions.

11p tamynhan5 10-12-2020 28 2   Download

Turmeric residue (TR), which is obtained from the extraction process of curcuminoids, may remain biological active compounds. This study was conducted to examine the effects of the TR on hematological parameters, nutrient digestibility, and growth performance in hybrid catfish (Clarias gariepinus × Heterobranchus bidorsalis).

9p tamynhan5 10-12-2020 13 2   Download

In Vietnam, Tam that hoang (Panax stipuleanatus Tsai et Feng) belonging to Araliaceous family is a valuable medicinal plant that possesses many biologically active compounds. Among them, flavonoids, polysaccharides, and saponins are the major constituents of this plant.

8p tamynhan9 02-12-2020 16 2   Download

An understanding of soil microorganisms as part of soil system and interactions between the diversity of producers and of decomposers, have major consequences on the functioning of agricultural ecosystems. Soil microorganisms control the transformation and mineralization of natural compounds and xenobiotics. The soil micro biota, existing in high density and diversity, rapidly modify the energetic performance and activity rates to changing environmental conditions.

9p nguaconbaynhay6 24-06-2020 20 1   Download

The research goals of the dissertation: The research separates, identifies structural characteristics and tests biological activity of fucoidan from several brown algae growing up in Vietnamese Seas to serve for investigating Vietnamese natural sea compound resources and making clear the chemical nature of research objects.

26p xacxuoc4321 09-07-2019 29 6   Download

The aims of the dissertation are: Extracting and determining the structure of organic compounds of four plant species with potential for insecticide and fungal diseases. Isolating endogenous fungi from plant samples, extracting and determining the structure of component organic compounds. Testing of insecticidal and fungal activity of extracts and component organic compounds.

35p xacxuoc4321 08-07-2019 33 3   Download

Template reactions play a very important role in the formation of many natural macro- heterocyclic compounds that have biological activities such as porphyrine, metalloenzyme etc. and become one type of the most important reactions in bioinorganic Chemistry and other relating fields.

5p uocvong03 24-09-2015 49 2   Download

There is strong interest in creating an enzyme that can deacylate natural cephalosporins such as cephalosporin C in order to efficiently acquire the starting compound for the industrial production of semisynthetic cephalo-sporin antibiotics. In this study, the active site of the glutaryl acylase from PseudomonasSY-77 was randomized rationally.

11p media19 04-03-2013 36 2   Download

GlutathioneS-transferases (GSTs) catalyze the conjugation of glutathione to hydrophobic compounds, contributing to the metabolism of toxic chemicals. In this study, we show that two naturally occurring tau GSTs (GSTUs) exhibit distinctive kinetic parameters towards 1-chloro-2,4-dini-trobenzene (CDNB), although they differ only in three amino acids (Arg89, Glu117 and Ile172 in GSTU1 are replaced by Pro89, Lys117 and Val172 in GSTU2).

8p mobifone23 18-01-2013 42 3   Download

Most drugs against malaria that are available or under development target a single process of the parasite infective cycle, favouring the appearance of resistant mutants which are easily spread in areas under chemotherapeutic treatments.

11p cosis54 04-01-2013 32 4   Download