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Search Results: 1 - 10 of 378501 matches for " J.T. Banzouzi "
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Traditional Uses of the African Millettia species (Fabaceae)
J.T. Banzouzi,A. Prost,M. Rajemiarimiraho,P. Ongoka
International Journal of Botany , 2008,
Abstract: This study aimed to constitute a complete and cross-checked listing of the medicinal African Millettia species and of their uses. Indeed, the genus Millettia has an important place in the pharmacopoeias of sub-Saharan Africa, with numerous therapeutic indications, such as antitumoral, anti-inflammatory, antiviral, bactericidal, insecticidal and pest-destroying. The multiplicity of these activities, well known in traditional medicine, is being confirmed by pharmacological studies in laboratory and confers on this genus an interest as great in traditional medicine as in phytochemical research of active compounds. In this study, we begin by giving the distribution by country of the 139 African Millettia and presenting the threatened species, to continue with an overall presentation of all the traditional uses we could gather for the 51 medicinal African Millettia. The desire of the CERMA is to make this information available for the traditional practitioners and all the persons involved in the valorization of the traditional therapeutic know-how.
Survey of Analgesic Plants Used by Tradipractitioners in Congo Brazzaville
J.T. Banzouzi,M.C. Makambila Koubemba,A. Prost,B. Mbatchi
International Journal of Botany , 2008,
Abstract: A series of semi-structured interviews with traditional practitioners from the South of Congo Brazzaville allowed us to gather the names of 200 plants entering traditional preparations against pain. Some were already well studied for their analgesic and/or psychotropic properties but others were very little documented. We selected 51 plants, belonging to 32 families, which seemed promising but had not yet been studied in laboratory. For each plant, we collected the following data: used plant parts, modes of preparation and administration, as well as indications relating to the treatment when they were available. Around 150 traditional recipes were thus recorded. In analgesic as well as in psychotropic preparations, leaves are the most used part (43 and 40% of citations, respectively), followed by roots or root bark (17-13%), aerial part (11-6%), stem and trunk bark (20-11%). Decoction is the major mode of preparation and in most cases the preparation is drunk or applied locally (friction, massage). As a rule, plants used, dosage and length of the treatment shall vary depending to age, sex and general health condition of the patient. Self-medication can thus be very dangerous, all the more because some of the plants we studied are easily bought in the market places of Brazzaville or Pointe Noire.
Toxicological Assessment of Methanolic Stem Bark and Leaf Extracts of Entada africana Guill. and Perr., Mimosaceae
A. Tibiri,J.T. Banzouzi,A. Traore,G.O Nacoulma
International Journal of Pharmacology , 2007,
Abstract: This study was aimed to assess the possible toxic effects of Entada africana, a widely used African medicinal plant. The acute toxicity of the methanolic stem bark and leaf extracts of Entada africana Guill. and Perr., (Mimosaceae) was assessed on mice. It revealed an average toxicity with a LD50 of 146.7 and 249.9 mg kg-1 body weight for stem barks and leaves, respectively. The extracts showed no cytotoxicity against KB and Vero cells. Sub-chronic toxicity was assessed in rabbits, which received orally, daily for a month, a dose corresponding to 10% of the LD50. Compared to the control group this dose caused no significant (p>0.05) modification of haematological and biochemical parameters, total cholesterol, urea, creatinine and aspartate amino-transferase (AST). The extracts lowered serum glucose significantly (p<0.05) by 52% at first two weeks of treatment. The stem bark and leaf extracts showed temporary decrease (p<0.05) of Alanine amino transferase (ALT) by 26.1 and 39.1%, respectively. The stem bark extracts increased triglycerides significantly (p<0.01) by 108% at the end of last week of treatment. These investigations seemed to indicate the safety ob sub-chronic oral administration (up to 14.67 and 24.9 mg kg-1 body weight) of the methanolic extracts of Entada africana in rabbits.
Radical Scavenging Activity, Phenolic Content and Cytotoxicity of Bark and Leaves Extracts of Entada africana Guill. and Perr. (Mimosaceae)
A. Tibiri,O. Rakotonandrasana,G.O. Nacoulma,J.T. Banzouzi
Journal of Biological Sciences , 2007,
Abstract: Dried ground leaves and barks of Entada africana were extracted by maceration in methanol and fractioned with chloroform, ethyle acetate and water. The total phenolic content of each fraction was determined spectrophotometrically according to Folin-Ciocalteu`s method and calculated as Tannic Acid Equivalent (TAE). Tannins and flavonoids were also determined. The total phenolic content was quite high, especially in the aqueous fraction (up to 39.7% TAE in the barks and 39.9% in the leaves). The antioxidant activity of lyophilized extracts was determined at room temperature by the means of the 2,2-diphenyl-1-picrylhydrazyl (DPPH!) colorimetric method with a detection scheme at 517 nm and expressed as EC50. The radical scavenging activity was evaluated as the difference in absorbance between a test sample and the control (methanol). Bark extracts had the best EC50, similar to those of rutoside and ascorbic acid for the aqueous and methanol fraction (5.7 and 5.3 μg mLG1, respectively). All the other extracts were moderately active (EC50 ranging from 6.9 to 20.0 μg mLG1), except the chloroform extracts (EC50 > 69 μg mLG1). Except for the crude and aqueous bark extracts, no extract was cytotoxic on KB or Vero cells.
Sampling and Reconstruction of Zero-Order Hold Signals by Parallel RC Filters  [PDF]
J.T Olkkonen, H Olkkonen
Wireless Engineering and Technology (WET) , 2011, DOI: 10.4236/wet.2011.23022
Abstract: In this work we describe a reconstruction algorithm for zero-order hold (ZOH) waveforms measured by a parallel sam-pling scheme. In the method the ZOH signal is fed to a parallel network consisting of resistor-capacitor (RC) filters, whose outputs are sampled simultaneously. The algorithm reconstructs N previous samples of the input signal from output samples of N parallel RC circuits. The method is especially useful in sampling and reconstruction of the ZOH signals produced by the digital-to-analog converters. Using the parallel sampling method the sampling rate of the analog-to-digital converters can be increased by a factor of N. We discuss a variety of applications such as reconstruction of ZOH pulse sequences produced by ultra wide band (UWB) transmitters.
Introdu??o à dádiva
Godbout, J.T.;
Revista Brasileira de Ciências Sociais , 1998, DOI: 10.1590/S0102-69091998000300002
Abstract: firstly, the article surveys explicative schemes based on notions such as interest, rationality and utility; under several different names, they have a "paradigmatical privilege" in human sciences. although these models seem to have an undeniable appeal, they also possess evident limitations, as much as the alternative models based on the "other dominating paradigm", that is, holism. they all reveal themselves to be unable to explain a great deal of human actions, specially those which can be placed under what the author calls "the system of gift". an alternative explicative model to the ruling paradigms is then presented, based on the idea of gift; it is inspired by the thinking of marcel mauss, and it may provide different presuppositions, new questions and new answers.
Lorde Kelvin demonstrado
Lloyd, J.T.;
Revista Brasileira de Ensino de Física , 2007, DOI: 10.1590/S1806-11172007000400005
Abstract: translation of the paper "lord kelvin demonstrated", the physics teacher 18, 16-24 (1980).
Molecular evolution in bacteria: cell division
Trevors, J.T.;
Revista de Microbiologia , 1998, DOI: 10.1590/S0001-37141998000400001
Abstract: molecular evolution in bacteria is examined with an emphasis on the self-assembly of cells capable of primitive division and growth during early molecular evolution. also, the possibility that some type of encapsulation structure preceeded biochemical pathways and the assembly of genetic material is examined. these aspects will be considered from an evolutionary perspective.
Mapping the Future—Merging the Old with the New Across Disciplines
J.T. Efird
Cancer Informatics , 2012, DOI: 10.4137/CIN.S11195
Abstract: No abstract supplied by author
J. Kats and Indonesian studies; Acquaintanceship
J.T. Collins
Bijdragen tot de Taal-, Land- en Volkenkunde , 1992,
Abstract:
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