Kosi Novidzro - Academia.edu (original) (raw)
Papers by Kosi Novidzro
International Journal of Chemical Studies, 2019
Global warming is one of the manifestations of greenhouse gas emissions from fossil fuels consump... more Global warming is one of the manifestations of greenhouse gas emissions from fossil fuels consumption. To reduce the trend in transport sector, policymakers around the world are favorably supporting researchers in successful programs to replace conventional fuels with biofuels. Togolese flora has a potential for agro resources rich in convertible sugars into bioethanol. This study aims to promote the use of starch of Icacina senegalensis, for green energy production. The hydrolysis of the starches was carried out with 5.5% of H2SO4 and the hydrolysates were converted biologically into bioethanol using of Saccharomyces cerevisiae yeasts as ferment. The results show that sucrose is more alcoholic than sweet hydrolysates obtained from starches. However, taking into account the non-edibility and availability of raw materials, the tubers of Icacina senegalensis stand out as the best substrate for 1th generation bioethanol production. This results can be improve by enzymatic hydrolysis an...
Ficus sur est une plante alimentaire couramment utilisee en medecine traditionnelle au Togo. Elle... more Ficus sur est une plante alimentaire couramment utilisee en medecine traditionnelle au Togo. Elle a cependant fait l’objet de tres peu d’etudes phytochimiques. Le present travail a pour but de valoriser cette espece a travers l’identification continue de ses metabolites. Ainsi, l’extraction cyclohexanique au Soxhlet a ete realisee sur les feuilles de Ficus sur . Cet extrait cyclohexanique obtenu a ete ensuite fractionne puis purifie par chromatographie sur colonne de gel de silice. L’identification des composes a ete realisee par GC-MS, precedee quelquefois d’une etape de derivatisation. Treize fractions (A1 a A13) ont ete obtenues du fractionnement de cet extrait. Apres deux purifications successives de la fraction A5, deux sous-fractions A5.1 et A5.2 ont ete obtenues. Le spectre de masse d’un compose de A2 presente un pic moleculaire a m/z 426 et des pics fragments [M-69] + , [M-154] + , [M-169] + , [M-197] + , [M-208] + et [M-219] + caracteristique du taraxasterol. Pour A5.2 deri...
The fruits of Solanum torvum (Swartz), a vegetable-fruit, are used in traditional medicine in Tog... more The fruits of Solanum torvum (Swartz), a vegetable-fruit, are used in traditional medicine in Togo in the treatment of infectious diseases and as an anti-anemic. This study then focused on the antimicrobial activity assessment of the hydroethanolic extract of these fruits in the interest of contributing to the valorization of this Togolese flora’s species. A hydroethanolic extraction (50 % 50 %: v/v) was performed followed by preliminary phytochemical tests. Antimicrobial activity was determined on fourteen bacterial strains using the agar diffusion method. Qualitative phytochemical screening revealed the presence of alkaloids, reducing compounds, tannins, cardiac glycosides, flavonoids, coumarins, triterpenes, saponins, total carbohydrates and free quinones. The extract was active on the reference strains of S. aureus, E. coli, S. pneumoniae and P. aeruginosa. However, this activity was only observed on clinical strains of S. pneumoniae and P. aeruginosa. The extract showed MICs of...
International Journal of Pharmacy and Chemistry, 2019
Vegetable oils, including palm kernel oil, are an important part of the human diet. However, trad... more Vegetable oils, including palm kernel oil, are an important part of the human diet. However, traditional methods of storing them often do not take into account changes in quality. In addition, these are food products whose rancidity by autooxidation could affect the health of the consumer. The objective of this work is to evaluate the physico-chemical quality of palm kernel oil during storage at room temperature and away from light. The palm kernel oil samples were collected in plastic containers under strict hygienic conditions, wrapped in aluminium foil and stored at ambient temperature away from light. Physico-chemical parameters were determined for fresh samples and for samples stored after 180 days. The results showed that after 180 days, the oils analysed showed the onset of oxidation. However, the characteristics after 180 days of storage indicate that the oils still have a relatively acceptable quality compared to Codex Alimentarius standards, concomitantly with the high content of saturated fatty acids. Thus, away from light, palm kernel oils could be stored for six months at ambient temperature with a lower risk of rancidity. However, the relative deterioration observed after 180 days of storage requires precautions in the conservation of palm kernel oils produced in Togo.
International Journal of Pharmacy and Chemistry, 2019
Vegetable oils, including palm kernel oil, are an important part of the human diet. However, trad... more Vegetable oils, including palm kernel oil, are an important part of the human diet. However, traditional methods of storing them often do not take into account changes in quality. In addition, these are food products whose rancidity by autooxidation could affect the health of the consumer. The objective of this work is to evaluate the physico-chemical quality of palm kernel oil during storage at room temperature and away from light. The palm kernel oil samples were collected in plastic containers under strict hygienic conditions, wrapped in aluminium foil and stored at ambient temperature away from light. Physico-chemical parameters were determined for fresh samples and for samples stored after 180 days. The results showed that after 180 days, the oils analysed showed the onset of oxidation. However, the characteristics after 180 days of storage indicate that the oils still have a relatively acceptable quality compared to Codex Alimentarius standards, concomitantly with the high content of saturated fatty acids. Thus, away from light, palm kernel oils could be stored for six months at ambient temperature with a lower risk of rancidity. However, the relative deterioration observed after 180 days of storage requires precautions in the conservation of palm kernel oils produced in Togo.
Journal of Drug Delivery and Therapeutics
The fruits of Solanum torvum (Swartz), a vegetable-fruit, are used in traditional medicine in Tog... more The fruits of Solanum torvum (Swartz), a vegetable-fruit, are used in traditional medicine in Togo in the treatment of infectious diseases and as an anti-anemic. This study then focused on the antimicrobial activity assessment of the hydroethanolic extract of these fruits in the interest of contributing to the valorization of this Togolese flora’s species. A hydroethanolic extraction (50 % - 50 %: v/v) was performed followed by preliminary phytochemical tests. Antimicrobial activity was determined on fourteen bacterial strains using the agar diffusion method. Qualitative phytochemical screening revealed the presence of alkaloids, reducing compounds, tannins, cardiac glycosides, flavonoids, coumarins, triterpenes, saponins, total carbohydrates and free quinones. The extract was active on the reference strains of S. aureus, E. coli, S. pneumoniae and P. aeruginosa. However, this activity was only observed on clinical strains of S. pneumoniae and P. aeruginosa. The extract showed MICs ...
International Journal of Chemical Studies, 2019
Global warming is one of the manifestations of greenhouse gas emissions from fossil fuels consump... more Global warming is one of the manifestations of greenhouse gas emissions from fossil fuels consumption. To reduce the trend in transport sector, policymakers around the world are favorably supporting researchers in successful programs to replace conventional fuels with biofuels. Togolese flora has a potential for agro resources rich in convertible sugars into bioethanol. This study aims to promote the use of starch of Icacina senegalensis, for green energy production. The hydrolysis of the starches was carried out with 5.5% of H2SO4 and the hydrolysates were converted biologically into bioethanol using of Saccharomyces cerevisiae yeasts as ferment. The results show that sucrose is more alcoholic than sweet hydrolysates obtained from starches. However, taking into account the non-edibility and availability of raw materials, the tubers of Icacina senegalensis stand out as the best substrate for 1th generation bioethanol production. This results can be improve by enzymatic hydrolysis an...
Ficus sur est une plante alimentaire couramment utilisee en medecine traditionnelle au Togo. Elle... more Ficus sur est une plante alimentaire couramment utilisee en medecine traditionnelle au Togo. Elle a cependant fait l’objet de tres peu d’etudes phytochimiques. Le present travail a pour but de valoriser cette espece a travers l’identification continue de ses metabolites. Ainsi, l’extraction cyclohexanique au Soxhlet a ete realisee sur les feuilles de Ficus sur . Cet extrait cyclohexanique obtenu a ete ensuite fractionne puis purifie par chromatographie sur colonne de gel de silice. L’identification des composes a ete realisee par GC-MS, precedee quelquefois d’une etape de derivatisation. Treize fractions (A1 a A13) ont ete obtenues du fractionnement de cet extrait. Apres deux purifications successives de la fraction A5, deux sous-fractions A5.1 et A5.2 ont ete obtenues. Le spectre de masse d’un compose de A2 presente un pic moleculaire a m/z 426 et des pics fragments [M-69] + , [M-154] + , [M-169] + , [M-197] + , [M-208] + et [M-219] + caracteristique du taraxasterol. Pour A5.2 deri...
The fruits of Solanum torvum (Swartz), a vegetable-fruit, are used in traditional medicine in Tog... more The fruits of Solanum torvum (Swartz), a vegetable-fruit, are used in traditional medicine in Togo in the treatment of infectious diseases and as an anti-anemic. This study then focused on the antimicrobial activity assessment of the hydroethanolic extract of these fruits in the interest of contributing to the valorization of this Togolese flora’s species. A hydroethanolic extraction (50 % 50 %: v/v) was performed followed by preliminary phytochemical tests. Antimicrobial activity was determined on fourteen bacterial strains using the agar diffusion method. Qualitative phytochemical screening revealed the presence of alkaloids, reducing compounds, tannins, cardiac glycosides, flavonoids, coumarins, triterpenes, saponins, total carbohydrates and free quinones. The extract was active on the reference strains of S. aureus, E. coli, S. pneumoniae and P. aeruginosa. However, this activity was only observed on clinical strains of S. pneumoniae and P. aeruginosa. The extract showed MICs of...
International Journal of Pharmacy and Chemistry, 2019
Vegetable oils, including palm kernel oil, are an important part of the human diet. However, trad... more Vegetable oils, including palm kernel oil, are an important part of the human diet. However, traditional methods of storing them often do not take into account changes in quality. In addition, these are food products whose rancidity by autooxidation could affect the health of the consumer. The objective of this work is to evaluate the physico-chemical quality of palm kernel oil during storage at room temperature and away from light. The palm kernel oil samples were collected in plastic containers under strict hygienic conditions, wrapped in aluminium foil and stored at ambient temperature away from light. Physico-chemical parameters were determined for fresh samples and for samples stored after 180 days. The results showed that after 180 days, the oils analysed showed the onset of oxidation. However, the characteristics after 180 days of storage indicate that the oils still have a relatively acceptable quality compared to Codex Alimentarius standards, concomitantly with the high content of saturated fatty acids. Thus, away from light, palm kernel oils could be stored for six months at ambient temperature with a lower risk of rancidity. However, the relative deterioration observed after 180 days of storage requires precautions in the conservation of palm kernel oils produced in Togo.
International Journal of Pharmacy and Chemistry, 2019
Vegetable oils, including palm kernel oil, are an important part of the human diet. However, trad... more Vegetable oils, including palm kernel oil, are an important part of the human diet. However, traditional methods of storing them often do not take into account changes in quality. In addition, these are food products whose rancidity by autooxidation could affect the health of the consumer. The objective of this work is to evaluate the physico-chemical quality of palm kernel oil during storage at room temperature and away from light. The palm kernel oil samples were collected in plastic containers under strict hygienic conditions, wrapped in aluminium foil and stored at ambient temperature away from light. Physico-chemical parameters were determined for fresh samples and for samples stored after 180 days. The results showed that after 180 days, the oils analysed showed the onset of oxidation. However, the characteristics after 180 days of storage indicate that the oils still have a relatively acceptable quality compared to Codex Alimentarius standards, concomitantly with the high content of saturated fatty acids. Thus, away from light, palm kernel oils could be stored for six months at ambient temperature with a lower risk of rancidity. However, the relative deterioration observed after 180 days of storage requires precautions in the conservation of palm kernel oils produced in Togo.
Journal of Drug Delivery and Therapeutics
The fruits of Solanum torvum (Swartz), a vegetable-fruit, are used in traditional medicine in Tog... more The fruits of Solanum torvum (Swartz), a vegetable-fruit, are used in traditional medicine in Togo in the treatment of infectious diseases and as an anti-anemic. This study then focused on the antimicrobial activity assessment of the hydroethanolic extract of these fruits in the interest of contributing to the valorization of this Togolese flora’s species. A hydroethanolic extraction (50 % - 50 %: v/v) was performed followed by preliminary phytochemical tests. Antimicrobial activity was determined on fourteen bacterial strains using the agar diffusion method. Qualitative phytochemical screening revealed the presence of alkaloids, reducing compounds, tannins, cardiac glycosides, flavonoids, coumarins, triterpenes, saponins, total carbohydrates and free quinones. The extract was active on the reference strains of S. aureus, E. coli, S. pneumoniae and P. aeruginosa. However, this activity was only observed on clinical strains of S. pneumoniae and P. aeruginosa. The extract showed MICs ...