A5024785773- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Natural product bioactivities and synthesis
- Phytochemistry and Biological Activities
- Bioactive natural compounds
- Essential Oils and Antimicrobial Activity
- Plant Toxicity and Pharmacological Properties
- Phytochemistry and Bioactive Compounds
- Synthesis of Indole Derivatives
- Botanical Research and Chemistry
- Plant chemical constituents analysis
- Biological Activity of Diterpenoids and Biflavonoids
- Pesticide Residue Analysis and Safety
- Traditional and Medicinal Uses of Annonaceae
- Drug-Induced Hepatotoxicity and Protection
- Mycotoxins in Agriculture and Food
- Ethnobotanical and Medicinal Plants Studies
- Building materials and conservation
- Cultural Heritage Materials Analysis
- Plant biochemistry and biosynthesis
- African Botany and Ecology Studies
- Insect Pest Control Strategies
- Advanced Physical and Chemical Molecular Interactions
- Phytochemicals and Antioxidant Activities
- Plant Pathogens and Fungal Diseases
University of Rwanda
2017-2024
Uppsala University
2019-2023
Xiamen University
2011
Three new dihydroflavonols, gloverinols A-C (
Abstract The adsorption of N-vinylpyrrolidone from aqueous polyvinylpyrrolidone solution using bamboo-based activated carbon was studied. isotherms on the were determined and modeled with Langmuir, Freundlich, Temkin models. Langmuir model provides best fitting for equilibrium data maximum monolayer capacity estimated to be 833.3 mg/g. kinetics process N-vinyulpyrrolidone various equations including pseudo first-order, second-order, intra-particle diffusion equations. follows second-order...
Two new prenylated dihydrochalcones (1,2) and eighteen known secondary metabolites (3−20) were isolated from the CH2Cl2-MeOH (1:1) extracts of roots, stem bark leaves Eriosema montanum Baker f. (Leguminosae). The structures compounds characterized by NMR, IR, UV spectroscopic mass spectrometric analyses. 5, 10, 11 13 confirmed single crystal X-ray diffraction. antibacterial activity crude constituents established against Gram-positive Gram-negative bacteria. Among tested compounds, 1–4 10...
The methanol root extract of Clerodendrum myricoides (Hochst.) Vatke afforded two new (1, 2) and known (3, 4) iridoid glycosides. structures the isolated compounds were established based on NMR, IR, UV MS data analyses. crude constituents assayed for antiviral activity against human respiratory syncytial virus (RSV) in laryngeal epidermoid carcinoma (HEp-2) cells. inhibited RSV infectivity at EC50 = 0.21 μg/ml, while it showed cytotoxicity HEp-2 cells with CC50 9 μg/ml. Compound 2 43.2%...
Essential oils were extracted from leaves of Eucalyptus melliodora and anceps by steam distillation chemically analysed using GC/MS.The main components obtained in both species were, monoterpenes: 1,8-cineole (47.7 %, 33.49 %) α-pinene (7.8 13.69 as dominant components, sesquiterpenes: aromandrene (1 18.01 allo-aromandrene (1.5 2.37 %), respectively. Caryophyllene (5.1 bicyclogermacrene (4.6 found only E. melliodora. The antifungal efficacy these essential was assessed against R. nigricans,...
The leaf extract of
The acid resistance of ultramarine blue was greatly enhanced by silica coatings. Sodium metasilicate nonahydrate used as precursor and ammonium chloride to react with it. Fourier transform infrared (FT-IR) spectroscopy characterize surface structure on the coating layer. effects conditions resistances coated were investigated. evaluated immersing pigment in 10 wt% hydrochloric acid. results showed optimal mass ratio silicate 3.75 proper solid content 60 g/L. Under above conditions, exhibited...
Abstract Three new compounds, the silphiperfolanol angelate ester umutagarananol ( 1 ), macrocyclic pyrrolizidine alkaloids umutagarinine A and B 2 – 3 five known secondary metabolites 4 8 ) were isolated from CH Cl −MeOH (1 : 1) extract of roots stem bark Solanecio mannii (Hook. f.) (Asteraceae). The compounds characterized by NMR IR spectroscopic, mass spectrometric analyses, whereas relative stereochemistry was established NAMFIS‐based combined computational solution analysis. Synthetic...
Phytochemicals constitute reliable sources of antifungal and antioxidant compounds with low toxicity to mammals safe the environment which may serve as substitutes for synthetically produced chemicals. The present work aims at screening, investigating antimycotic activities six medicinal plants, namely Croton macrostachyus (Euphorbiaceae), Clerodendrum (Rotheca) myricoides (Lamiaceae), Erucastrum arabicum (Brassicaceae), Melanthera scandens (Asteraceae), Senecio mannii Senna didymobotrya...