Institution
University of Burundi
Education•Bujumbura, Burundi•
About: University of Burundi is a education organization based out in Bujumbura, Burundi. It is known for research contribution in the topics: Population & Public health. The organization has 290 authors who have published 360 publications receiving 3888 citations. The organization is also known as: UB & University of Burundi.
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TL;DR: These findings demonstrate that Bryophyllum pinnatum and some of its isolated compounds have interesting antimicrobial and antioxidant properties, and therefore confirming the traditional use of B. pinnum in the treatment of infectious and free radical damages.
Abstract: Bryophyllum pinnatum (Lank.) Oken (Crassulaceae) is a perennial succulent herb widely used in traditional medicine to treat many ailments. Its wide range of uses in folk medicine justifies its being called "life plant" or "resurrection plant", prompting researchers' interest. We describe here the isolation and structure elucidation of antimicrobial and/or antioxidant components from the EtOAc extract of B. pinnatum. The methanol extract displayed both antimicrobial activities with minimum inhibitory concentration (MIC) values ranging from 32 to 512 μg/ml and antioxidant property with an IC50 value of 52.48 μg/ml. Its partition enhanced the antimicrobial activity in EtOAc extract (MIC = 16-128 μg/ml) and reduced it in hexane extract (MIC = 256-1024 μg/ml). In addition, this process reduced the antioxidant activity in EtOAc and hexane extracts with IC50 values of 78.11 and 90.04 μg/ml respectively. Fractionation of EtOAc extract gave seven kaempferol rhamnosides, including; kaempferitrin (1), kaempferol 3-O-α-L-(2-acetyl)rhamnopyranoside-7-O-α-L-rhamnopyranoside (2), kaempferol 3-O-α-L-(3-acetyl)rhamnopyranoside-7-O-α-L-rhamnopyranoside (3), kaempferol 3-O-α-L-(4-acetyl)rhamnopyranoside-7-O-α-L-rhamnopyranoside (4), kaempferol 3-O-α-D- glucopyranoside-7-O-α-L-rhamnopyranoside (5), afzelin (6) and α-rhamnoisorobin (7). All these compounds, except 6 were isolated from this plant for the first time. Compound 7 was the most active, with MIC values ranging from 1 to 2 μg/ml and its antioxidant activity (IC50 = 0.71 μg/ml) was higher than that of the reference drug (IC50 = 0.96 μg/ml). These findings demonstrate that Bryophyllum pinnatum and some of its isolated compounds have interesting antimicrobial and antioxidant properties, and therefore confirming the traditional use of B. pinnatum in the treatment of infectious and free radical damages.
195 citations
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TL;DR: An exceptionally wide variety of carbonate fades, dominated by highmagnesian calcite, occurs along the littoral and shallow sublittoral zones (<50 m) of Lake Tanganyika in central Africa as mentioned in this paper.
Abstract: An exceptionally wide variety of carbonate fades, dominated by high-magnesian calcite, occurs along the littoral and shallow sublittoral zones (<50 m) of Lake Tanganyika in central Africa. These facies include exposed and submerged, calcite-cemented ridges of nearshore terrigenous sand, ooid sand shoals, and lithified oolite ridges, Chara meadows of bioturbated calcareous silts, gastropod shell blankets and related coquinas, and extensive thrombolitic microbial reefs.
Though texturally and compositionally similar to many modern and ancient shallow-water marine facies, these deposits record carbonate deposition and cementation in a large, tropical, deep-water lake of tectonic origin. Lithofacies along Lake Tanganyika represent the broadest spectrum of carbonate deposits yet reported from any modern lake and serve as important analogues for lacustrine carbonate sequences in the stratigraphic record.
139 citations
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TL;DR: In this article, q-versions of some basic concepts of continuous variational calculus such as the Euler-Lagrange equation and its applications to the isoperimetric, Lagrange and optimal control problems (the maximum principle) were proposed.
129 citations
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TL;DR: The combination the unique properties of Pt nanoparticles and the ordered mesostructure of OMCs matrix guarantees the enhanced response for hydrogen peroxide and glucose.
102 citations
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TL;DR: Concentrations of selected organochlorine pesticides and PCBs in seven fish species from the north end of the LakeTanganyika, Burundi, Africa were determined and there is no evidence that Lake Tanganyika is more contaminated with pesticides than other African water bodies.
100 citations
Authors
Showing all 294 results
Name | H-index | Papers | Citations |
---|---|---|---|
Jingping Zhang | 47 | 445 | 9511 |
Alain Dejean | 40 | 310 | 7144 |
Godefroid Gahungu | 10 | 18 | 292 |
Joseph Odeurs | 10 | 70 | 443 |
Samuel Bunani | 9 | 14 | 305 |
L. Tack | 9 | 24 | 855 |
S. Niyonzima | 7 | 18 | 101 |
Gaspard Bangerezako | 7 | 9 | 270 |
Godefroid Gahungu | 6 | 14 | 137 |
Deo Baribwegure | 6 | 10 | 142 |
J. Shabani | 6 | 15 | 187 |
Christophe Niyungeko | 6 | 9 | 312 |
Irakoze Pierre Claver | 6 | 8 | 338 |
Charles Bakundukize | 6 | 10 | 211 |
Léonard Hari | 6 | 7 | 96 |