Mamadou Ndiaye Lo - Academia.edu (original) (raw)

Papers by Mamadou Ndiaye Lo

Research paper thumbnail of Electrocatalytic reduction of oxygen with phenanthroline-strapped porphyrins

Journal of Porphyrins and Phthalocyanines, 2007

The electrochemical behavior of three cytochrome c oxidase models has been investigated. All the ... more The electrochemical behavior of three cytochrome c oxidase models has been investigated. All the models are derived from a phenanthroline-strapped, porphyrin framework that binds zinc(II) or iron(III) chloride in the porphyrin subunit, and copper(I) in the phenanthroline site. The iron complex and the bimetallic zinc(II) copper(I) complex of the parent ligand have been characterized by X-ray diffraction. One model consists of the parent structure on which C 12 alkyl chains have been added. This soluble model achieves electrochemical 2-electron reduction of oxygen in organic solvents without the addition of an exogenous axial base, and in the presence of an organic or inorganic source of protons. The two other models comprise the parent phenanthroline-strapped porphyrin framework, on which two pendant imidazoles have been incorporated. These models adsorbed on ring-disk electrodes with an edge-oriented, pyrolytic graphite (EOPG) disk and a platinum ring, efficiently catalyze the 4-el...

Research paper thumbnail of Cattle farmer awareness and behavior regarding prevention of zoonotic disease transmission in senegal

Journal of agromedicine, 2015

Livestock farmers are known to be at high risk of exposure to zoonosis. A convenience survey to a... more Livestock farmers are known to be at high risk of exposure to zoonosis. A convenience survey to assess Senegalese traditional cattle farmers' knowledge and attitudes regarding zoonotic diseases with reference to bovine brucellosis was conducted. A total of 222 cattle farmers were interviewed. Just over a quarter (30.1%) of the study participants knew or had heard of zoonotic diseases, whereas 6.8% knew at least one mode of transmission. Rabies was the most named zoonotic disease by farmers who knew zoonosis. Meanwhile, no farmer had heard of bovine brucellosis. Identification of zoonotic disease varied significantly by farmer's main activity. All farmers reported that they drink milk produced on their cattle farms, and 95.0% drank fresh milk without prior heat treatment. A majority of farmers (70.3%) regularly assist animals during parturition and abortion without protective gloves. Farmers were less likely to assist animals if they had attended formal education. This study ...

Research paper thumbnail of Synthesis of stable free base secochlorins and their corresponding metal complexes from meso-tetraarylporphyrin derivatives

Chemical Communications, 2012

Research paper thumbnail of Stepwise Fusion of Porphyrin β,β′-Pyrrolic Positions to Imidazole Rings

Organic Letters, 2011

A strategy for the stepwise annulation of pyrrolic rings of a porphyrin to imidazole rings is pre... more A strategy for the stepwise annulation of pyrrolic rings of a porphyrin to imidazole rings is presented. Mono(imidazole), Janus and corner bis(imidazole), T-shaped tris(imidazole), and tetrakis(imidazole) porphyrins have been synthesized and characterized. Among π-conjugated molecules, porphyrins are of great interest because they are photo-and electroactive molecules which have wide applications in catalysis, 1 medicine, 2 and materials science. 3 The introduction of π conjugated systems fused to the aromatic core of a porphyrin can deeply modify their electronic properties, as illustrated for exocyclic fused rings such as pyridine, 4 quinoxaline, 5 quinoline, 6 isoquinoline, 6a

Research paper thumbnail of Electrocatalytic reduction of oxygen with phenanthroline-strapped porphyrins

Journal of Porphyrins and Phthalocyanines, 2007

The electrochemical behavior of three cytochrome c oxidase models has been investigated. All the ... more The electrochemical behavior of three cytochrome c oxidase models has been investigated. All the models are derived from a phenanthroline-strapped, porphyrin framework that binds zinc(II) or iron(III) chloride in the porphyrin subunit, and copper(I) in the phenanthroline site. The iron complex and the bimetallic zinc(II) copper(I) complex of the parent ligand have been characterized by X-ray diffraction. One model consists of the parent structure on which C 12 alkyl chains have been added. This soluble model achieves electrochemical 2-electron reduction of oxygen in organic solvents without the addition of an exogenous axial base, and in the presence of an organic or inorganic source of protons. The two other models comprise the parent phenanthroline-strapped porphyrin framework, on which two pendant imidazoles have been incorporated. These models adsorbed on ring-disk electrodes with an edge-oriented, pyrolytic graphite (EOPG) disk and a platinum ring, efficiently catalyze the 4-el...

Research paper thumbnail of Cattle farmer awareness and behavior regarding prevention of zoonotic disease transmission in senegal

Journal of agromedicine, 2015

Livestock farmers are known to be at high risk of exposure to zoonosis. A convenience survey to a... more Livestock farmers are known to be at high risk of exposure to zoonosis. A convenience survey to assess Senegalese traditional cattle farmers' knowledge and attitudes regarding zoonotic diseases with reference to bovine brucellosis was conducted. A total of 222 cattle farmers were interviewed. Just over a quarter (30.1%) of the study participants knew or had heard of zoonotic diseases, whereas 6.8% knew at least one mode of transmission. Rabies was the most named zoonotic disease by farmers who knew zoonosis. Meanwhile, no farmer had heard of bovine brucellosis. Identification of zoonotic disease varied significantly by farmer's main activity. All farmers reported that they drink milk produced on their cattle farms, and 95.0% drank fresh milk without prior heat treatment. A majority of farmers (70.3%) regularly assist animals during parturition and abortion without protective gloves. Farmers were less likely to assist animals if they had attended formal education. This study ...

Research paper thumbnail of Synthesis of stable free base secochlorins and their corresponding metal complexes from meso-tetraarylporphyrin derivatives

Chemical Communications, 2012

Research paper thumbnail of Stepwise Fusion of Porphyrin β,β′-Pyrrolic Positions to Imidazole Rings

Organic Letters, 2011

A strategy for the stepwise annulation of pyrrolic rings of a porphyrin to imidazole rings is pre... more A strategy for the stepwise annulation of pyrrolic rings of a porphyrin to imidazole rings is presented. Mono(imidazole), Janus and corner bis(imidazole), T-shaped tris(imidazole), and tetrakis(imidazole) porphyrins have been synthesized and characterized. Among π-conjugated molecules, porphyrins are of great interest because they are photo-and electroactive molecules which have wide applications in catalysis, 1 medicine, 2 and materials science. 3 The introduction of π conjugated systems fused to the aromatic core of a porphyrin can deeply modify their electronic properties, as illustrated for exocyclic fused rings such as pyridine, 4 quinoxaline, 5 quinoline, 6 isoquinoline, 6a