Biological tests

The present study investigated the phytochemical and biological properties of the rhizomes C. aromatica. From the CHCl3 extract of C. aromatic rhizomes, six known compounds, including (-)-hannokinol, (3R,5R)-3,5-diacetoxy-1,7-bis(4- hydroxyphenyl)heptane, naringenin, 2-(4- (hydroxymethyl)phenyl)propan-2-ol, 5-hydroxymethylfurfural, and bisacurone, were isolated. All compounds were tested on the biological inhibitory activities against tyrosinase, αglucosidase, and urease. It was the first time all compounds were isolated from rhizomes of C. aromatica Salisb.

6p dianmotminh02 03-05-2024 4 3   Download

Animals can show very different behaviors even in isogenic populations, but the underlying mechanisms to generate this variability remain elusive. We use the zebrafish (Danio rerio) as a model to test the influence of histone modifications on behavior.

21p vimichaelfaraday 25-03-2022 13 1   Download

Objective of the study:Research some reproductive biology characteristics and identify technical solutions for artificial breeding of saddleback clownfish Amphiprion polymnus (Linnaeus, 1758).

29p tunelove 11-06-2021 19 3   Download

The research objectives of the thesis: Forecast the potential risks of Cu2+, Pb2+ residues on the reproduction and development of oysters Crassostrea gigas on Saigon - Dong Nai estuary.

24p extraenglish 24-05-2021 14 1   Download

Purposes of the study: Introduce and clarify the concept "the competency of exploring and obtaining knowledge" through elemental competencies and compatible activities in teaching maths for high school students; Find out the reality and need of improving the competency of exploring and obtaining knowledge in teaching maths for high schools students majoring in physics, chemistry and biology; Build and test the feasibility of pedagogy method applied in teaching maths at high school classes majoring in physics, chemistry, and biology to foster this capacity for students.

27p prisonbreak123 21-05-2021 22 3   Download

Aims of the study: Assess the composition and distribution of Amorphophallus genus (Amorphophallus spp.) contains glucomannan in some northern provinces in Vietnam; choosing the Amorphophallus species that has high level of glucomannan and developing potential for reproduction and growing in some norther provinces in Vietnam; testing the reproduction and growing of the candidate species in some northern provinces in Vietnam.

26p capheviahe27 23-02-2021 16 4   Download

The results of microbiological and toxicological tests have proved the safety of the bone-muscular cod waste (BMW). Waste (humerus with meat cuts) from cod cutting on fillets contains 18,95 % of a full-grade animal protein and insignificant amount of fat (0.15 %).

14p lucastanguyen 01-06-2020 17 2   Download

New ruthenium(III) complexes with 3-(Benzothiazol-2-yliminomethyl)-phenol (HL) ligand have been synthesized and characterized with the aid of elemental analysis, IR, electronic, and electron paramagnetic resonance spectroscopic techniques.

12p tocectocec 25-05-2020 10 2   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 objectives of the thesis: To identify species composition of PPNs on carrots in major carrot growing areas in Vietnam. To determine the parasitic nematode group causing significant damage to carrots in the studied areas. To evaluate the ability to control some important PPNs on carrots by using antagonistic fungi in the laboratory conditions.

27p xacxuoc4321 09-07-2019 61 4   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

Twenty two N-arylidenehydrazides of [6-(2-hetarylvinyl)-3-oxopyridazine-2-yl] acetic acid have been synthesized starting from levulinic acid. Their structures have been confirmed by UV, IR, NMR and mass spectra. The spectral properties and the biological activity were investigated. Some of the tested compounds exhibit fungicidal and bactericidal activity at 25 µg/ml.

5p uocvong04 24-09-2015 42 2   Download

Four substrate analogs, 4-(2-naphthyloxy)-2-butyn-1-amine (1), 1,4-diamino-2-chloro-2-butene (2), 1,6-diamino-2,4hexadiyne (3), and 2-chloro-5-phthalimidopentylamine (4) have been tested as inhibitors against mammalian, plant, bacterial, and fungal copper-containing amine oxidases: bovine plasma amine oxidase (BPAO), equine plasma amine oxidase (EPAO), pea seedling amine oxidase (PSAO), Arthrobacter globiformis amine oxidase (AGAO), Escherichia coli amine oxidase (ECAO), and Pichia pastoris lysyl oxidase (PPLO).

14p research12 01-06-2013 43 6   Download

Antizyme is a polyamine-induced cellular protein that binds to ornithine decarboxylase (ODC), and targets it to rapid ubiquitin-independent degradation by the 26S proteasome. However, the metabolic fate of antizyme is not clear. We have tested the stability of antizyme in mammalian cells. In contrast with previous studies demonstrating stability in vitro in a reticulocyte lysate-based degradation system, in cells antizyme is rapidly degraded and this degradation is inhibited by specific proteasome inhibitors. ...

7p research12 01-06-2013 40 3   Download

Diagnostic tests by molecular biology is made for studying the relations among Fusarium species for linking production of proteins, degree of relationship and occurrence of malformation. Determination of proteins for isolates causing-disease by SDS-PAGE explained there’s specific band for each fungus and there are common bands among some isolates of fungi. Since, band with MW 30 KDa represented only in F. proliferatum and F. oxysporum and F. subgluti-nans respectively. This band considered as specific band for these isolates, which released high patho-genisity effect.

7p zingzing09 24-04-2013 57 3   Download

OprM, the outer membrane component of the MexAB-OprM multidrug efflux pump ofPseudomonas aeruginosa, hasbeenassumed to facilitate the export of antibiotics across the outer membrane of this organism. Here we purified to homogeneity the OprM protein, reconstituted it into lipo-somemembranes, and tested its channel activitybyusing the liposome swellingassay. Itwas demonstrated thatOprMis a channel-forming protein and exhibits the channel property that amino acids diffuse more efficiently than saccharides....

8p research12 23-04-2013 40 4   Download

O-Glycosylation of three consecutive Thr residues in a fluorescein-conjugated peptide PTTTPLK)which mimics a portion of mucin 2)by four isozymes of UDP-N-ace-tylgalactosaminyltransferases (pp-GalNAc-T1, T2, T3, or T4) was investigated. Partially glycosylated versions of this peptide, PT*TTPLK, PTTT*PLK, PT*TT*PLK, PTT*T*PLK, PT*
TTPLK, andPTTT*
PLK(*,N-acetyl-galactosamine;
, galactose), were also tested.

11p tumor12 22-04-2013 30 3   Download

Intrinsic factor (IF) is the gastric protein that promotes the intestinal uptake of vitamin B12 . Gastric IF from animal sources is used in diagnostic tests and in vitamin pills. However, administration of animal IF to humans becomes disadvantageous because of possible pathogenic transmis-sion and contamination by other B12binders. We tested the use of recombinant plants for large-scale production of pathogen-free human recombinant IF. Human IF was successfully expressed in the recombinant plantArabidopsis thaliana....

6p tumor12 20-04-2013 37 3   Download

Cold shock proteins (CSPs) form a family of highly conserved bacterial proteins capable of single-stranded nucleic acid binding. They are suggested to act as RNA chaperones during cold shock inhibiting the formation of RNA secondary structures, which are unfavourable for transcription and translation.

12p fptmusic 12-04-2013 37 2   Download

To test the role of poly(ADP-ribose) polymerase on the telomerase activity, we determined the telomerase activity in leukemic cells K562 treated with benzamide and 4-amino 1,8 naphthalimide (NAP), the inhibitors of PARP. We observed that both the agents inhibited telomerase activity in a dose-dependent manner. The doses of benzamide and NAP that inhibited telo-merase activity to 50% of untreated control cells were 10.7 ± 0.6 mmand 200 ± 7lm, respectively.

12p fptmusic 11-04-2013 47 2   Download