Browsing UFR des Sciences et Technologies (ST) by Title
Now showing items 688-707 of 772
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Study of the reactivity of Casamance vegetable and agricultural waste char gasification with steam and CO2
(2018)The increasing energy demand coupled with the need to reduce greenhouse gas emissions and the threat of exhaustion of oil reserves make us consider a possible recourse to the use of biomass waste as a source of renewable ... -
Suivi technique des unités de filtration membranaire installées dans le bassin arachidier au Sénégal.
(2020)L’eau est une substance fondamentale utilisée dans le domaine de l’industrie, de l’agriculture et de la consommation humaine. Même si l’eau est abondante au niveau du globe terrestre, elle reste peu exploitée. En réalité ... -
Sulfonated surfactants obtained from furfural
(2013)Furfural obtained from pentose containing biomass such as hemicelluloses is subjected to photooxygenation. The resulting hydroxyfuranone obtained in high yields undergoes acetalization with fatty alcohols. Using NaHSO3, ... -
Sur la cohomologie des (C,H)-modules relatifs de Hopf
(2023)Soient K un corps, H une algèbre de Hopf d’antipode bijective et C une coalgèbre de H-module. Supposons qu’il existe un antimorphisme de coalgèbres ϕ : C −→ H avec ϕ(1C) = 1H en utilisant ϕ on définit une structure de ... -
Survival and growth of Acacia senegal (L.) Wild. (Senegalia senegal (L.) Britton) provenances depend on the rainfall at the site of origin
(2021)• Key message Variation among provenances of Acacia senegal (Senegalia senegal (L.) Britton) in their survival and growth in height and diameter at two sites in Senegal could be partly explained by the climate at their ... -
Synthese et caractérisation physico- chimique de composés aromatiques a base de schiff.
(2019)Synthétisées pour la première fois par Hugo SCHIFF au 19e siècle, les bases de Schiff sont caractérisées par le lien (C=N) et dans lequel l’atome d’azote est lié à un groupe aryle ou alkyle et non à un hydrogène1 . ... -
Synthesis and Antimalarial Activity of 1,4-Disubstituted Piperidine Derivatives
(2020)In order to prepare, at low cost, new compounds active against Plasmodium falciparum, and with a less side-effects, we have designed and synthesized a library of 1,4-disubstituted piperidine derivatives from 4-aminopiperidine ... -
Synthesis and antimalarial activity of cinnamic acid derivatives
(2019)A peptide coupling reaction between 1-(R)-phenylethylalanine and cinnamic acid derivatives has been successfully employed for the synthesis of a set of small molecules. The antimalarial activity of these derivative molecules ... -
Synthesis and characterization of regioselectively monoderivatized maltooligosaccharides through a combination of tandem mass spectrometry and enzymatic hydrolysis studies
(2013)Recently, we have designed chemical strategies leading to C-6 perfunctionalized linear maltoheptaose derivatives via the acetolysis of persubstituted β-cyclodextrin (β-CD) at the 6-positions. This approach has now been ... -
Synthesis and crystal structure of a new calcium-containing trimesate coordination polymer: [Ca3(btc)2(H2O)12]∞.
(2013)Reaction in gel between the sodium salt of 1,3,5-benzenetricarboxylic acid or trimesic (Na3[C6H3(COO)3] hereafter referenced as Na3btc) and calcium chloride has afforded single crystals of a bidimensional coordination ... -
Synthesis and crystal structure of a new coordination polymer based on lanthanum and 1,4-phenylenediacetate ligands.
(Edited by A. Van der Lee, Universite´ de Montpellier II, France., 2019)The water hydrogen atoms were localized and constrained. The thermal agitation of the two water molecules of crystal lization was constrained. In order to stabilize the refinement several restraints (DANG, DFIX) were ... -
Synthesis and evaluation of the antimalarial activity of cinnamic acids derived from piperidine
(2019)The synthesis and antimalarial activity of 1, 4-aminopiperidine derived cinnamic acids are described. Different analogs are prepared from reductive amination reactions and SN1 substitutions. These analogs are tested ... -
Synthesis of 1,2,3-triazole containing derivative of peperidine
(2020)A reductive amination reaction between N-Boc -piperidin-4-one and phenoxy-ethylamine was successfully used for the synthesis of (5-Methyl-2-phenyl-2H-[1,2,3] triazol-4ylmethyl)- (2-phenoxy-ethyl)-piperidin-4-yl-amine. The ... -
Synthesis of N-Substituted piperidines from piperidone
(2015)A reductive amination reaction between N-boc-piperidin-4-one and 3,4-dichloroaniline was successfully employed for the synthesis of the N-(3,4-dichloropheny)-N-(2-phenoxylethyl) piperidin-4-amine. The synthesis of a small ... -
Synthesis of regioselectively and uniformly modified maltoheptaose derivatives from cyclomaltoheptaose precursors
(Elsevier, 2005)Dérivés de l'heptadeoxy-6I – VII-halo, -azido et de l'hepta-6I – VII S-hepta (N-Boc-2-amino) éthyl-6I – VII-heptathiomaltoheptaose ont été préparés par acétolyse des dérivés de b-cyclodextrine modifiés par la per-C-6 ... -
Synthesis of surfactants from furfural derived 2[5H]-furanone and fatty amines
(2010)Furfural was oxidized to 2[5H]-furanone 2 using hydrogen peroxide. Furanone 2 was transformed with two equivalents of fatty amines. A condensation and a Michael reaction occurred. Ethyl bromoacetate 5 or methyl acrylate ... -
Synthesis, crystal structure and magnetic properties of a novel Nd(III)-Cu(II) heterometallic coordination polymer based on pyridine-3,5-dicarboxylateand oxalate ligands.
(2018)A novel 3d–4f heterometallic coordination polymer, {[NdCu(3,5-pdc)2(Oxa)0.5(H2O)8]2H2O}n (3,5- pdc=pyridine-3,5 dicarboxylate, Oxa=oxalate), has been successfully synthesized through slow diffusion in agar-agar gel ... -
Synthèse de ligands azotés, imines pour la préparation de complexes de fer.
(2019)La chimie de coordination des complexes de fer a toujours été un sujet intéressant grâce à ses diverses applications en particulier dans le domaine de la catalyse. Ainsi, les bases de Schiff sont utilisées pour la ... -
Synthèse de ligands nnn pour de nouveaux catalyseurs avec les métaux non-nobles : fer, manganèse, nickel, cobalt
(2022)L’intérêt de découvrir de nouveaux catalyseurs avec les métaux non-nobles, moins chers comme le fer, le manganèse, le nickel et le cobalt devient un besoin urgent vu la variété de leurs applications. De ce fait, les ... -
Synthèse de ligands organiques par réaction de condensation et par réaction catalysée par Gd et Nd. détermination de structure par spectroscopie et par diffraction des rayons X.
(2002)The reaction of condensation between hydrazide and aldehyde allowed the formation of compounds 1.2 and 3. The compounds 3 can also be synthesized from 1 or 2 in the presence of Ln...