Vincent Torve - Academia.edu (original) (raw)

Papers by Vincent Torve

Polymer Science, Series B

Journal of Toxicology, 2020

Cosmetologists may be potentially exposed to high levels of formaldehyde as a result of their exp... more Cosmetologists may be potentially exposed to high levels of formaldehyde as a result of their exposure to formaldehyde released from the various cosmetic products used in the beauty salons. In order to assess the exposure of cosmetologists to formaldehyde, the indoor air in sixty beauty salons across the ten submetros in Kumasi were sampled to determine the formaldehyde levels and the associated noncarcinogenic human health risks. Sampling was done using System Service Innovation Incorporation air sampler model 1000i, and the MBTH spectrophotometric method was used for analysis. The mean levels of formaldehyde concentrations ranged from 88.67 to 170.67 µg/m3. Out of the sixty salons sampled, 36 salons had formaldehyde levels above the WHO permissible limit of 100 µg/m3 for an eight-hour working period and also exceeded the 55 and 9 µg/m3 for chronic and acute reference exposure limit, respectively, set by the Office of Environmental Health Hazard Assessment. The results of this stud...

Journal of Toxicology

Cosmetologists may be potentially exposed to high levels of formaldehyde as a result of their exp... more Cosmetologists may be potentially exposed to high levels of formaldehyde as a result of their exposure to formaldehyde released from the various cosmetic products used in the beauty salons. In order to assess the exposure of cosmetologists to formaldehyde, the indoor air in sixty beauty salons across the ten submetros in Kumasi were sampled to determine the formaldehyde levels and the associated noncarcinogenic human health risks. Sampling was done using System Service Innovation Incorporation air sampler model 1000i, and the MBTH spectrophotometric method was used for analysis. The mean levels of formaldehyde concentrations ranged from 88.67 to 170.67 µg/m3. Out of the sixty salons sampled, 36 salons had formaldehyde levels above the WHO permissible limit of 100 µg/m3 for an eight-hour working period and also exceeded the 55 and 9 µg/m3 for chronic and acute reference exposure limit, respectively, set by the Office of Environmental Health Hazard Assessment. The results of this stud...

Research square, 2020

A novel bio-nanocomposite, FeS encapsulated chitosan grafted polyacrylamide, was successfully syn... more A novel bio-nanocomposite, FeS encapsulated chitosan grafted polyacrylamide, was successfully synthesized using a grafting technique that employs microwave irradiation. Employing FTIR, SEM, XRD, TEM and SAED analysis, the synthesized nanocomposites were characterized. Thermodynamic and kinetic studies were accomplished using the batch mode via the eosin yellow adsorption from aqueous solution using the nanocomposite. The adsorption process was tailored to the pseudo-second-order kinetic model and the Freundlich isotherm model. The enthalpy change, ∆H° (-12.243 kJ/mol), was an exothermic process. The Gibbs energy, ∆G° (from -5.492 kJ/mol.K to -5.078 kJ/mol.K for temperatures from 300 K to 318 K respectively) values were indications of a thermodynamically feasible reaction process which was spontaneous within the temperature domain. The change in entropy, ∆S° (-0.023 kJ/mol), showed reduced randomness during the adsorption process. The mean free energy of adsorption was 0.408 kJ/mol, ...

Cogent Food & Agriculture

The use of herbicides in weed control is on the increase but such chemical residues in crop plant... more The use of herbicides in weed control is on the increase but such chemical residues in crop plants mostly cause health risks. The objective of this work was to determine the level of some herbicide residues in sweet potato. The sweet potatoes were cultivated in randomized complete block design (RCBD) with four replications at the Crops Research Institute Agronomy fields, Kwadaso, Ghana. The different treatments made up of combinations of five pre-emergence herbicides (butachlor [50 g/L-3 L/Ha], imazethapyr [240 g/L-3 L/Ha], metolachlor [333 g/L-4 L/Ha], pendimethalin [500 g/L-3 L/Ha] and terbutryn [167 g/L-4 L/Ha]) and one (1) postemergence herbicide (propaquizafop [100 g/L-1.2 L/Ha]) were applied. After harvest, samples were randomly selected and extracted using a modified QuEChERS extraction method followed by liquid chromatography-mass spectrometry (LC-MS) to determine the residual levels of the herbicides. The results showed that butachlor, imazethapyr, terbutryn and propaquizafop were not detected in their respective sweet potato samples analysed. However, pendimethalin and metolachlor residues were detected at concentrations of 0.0023 µg/g and 0.0029 µg/g, respectively. The findings suggest that the herbicide residue levels detected were ABOUT THE AUTHOR Yvonne A. Hormenoo (MSc) was a Graduate

Polymer Science, Series B

Journal of Toxicology, 2020

Cosmetologists may be potentially exposed to high levels of formaldehyde as a result of their exp... more Cosmetologists may be potentially exposed to high levels of formaldehyde as a result of their exposure to formaldehyde released from the various cosmetic products used in the beauty salons. In order to assess the exposure of cosmetologists to formaldehyde, the indoor air in sixty beauty salons across the ten submetros in Kumasi were sampled to determine the formaldehyde levels and the associated noncarcinogenic human health risks. Sampling was done using System Service Innovation Incorporation air sampler model 1000i, and the MBTH spectrophotometric method was used for analysis. The mean levels of formaldehyde concentrations ranged from 88.67 to 170.67 µg/m3. Out of the sixty salons sampled, 36 salons had formaldehyde levels above the WHO permissible limit of 100 µg/m3 for an eight-hour working period and also exceeded the 55 and 9 µg/m3 for chronic and acute reference exposure limit, respectively, set by the Office of Environmental Health Hazard Assessment. The results of this stud...

Journal of Toxicology

Cosmetologists may be potentially exposed to high levels of formaldehyde as a result of their exp... more Cosmetologists may be potentially exposed to high levels of formaldehyde as a result of their exposure to formaldehyde released from the various cosmetic products used in the beauty salons. In order to assess the exposure of cosmetologists to formaldehyde, the indoor air in sixty beauty salons across the ten submetros in Kumasi were sampled to determine the formaldehyde levels and the associated noncarcinogenic human health risks. Sampling was done using System Service Innovation Incorporation air sampler model 1000i, and the MBTH spectrophotometric method was used for analysis. The mean levels of formaldehyde concentrations ranged from 88.67 to 170.67 µg/m3. Out of the sixty salons sampled, 36 salons had formaldehyde levels above the WHO permissible limit of 100 µg/m3 for an eight-hour working period and also exceeded the 55 and 9 µg/m3 for chronic and acute reference exposure limit, respectively, set by the Office of Environmental Health Hazard Assessment. The results of this stud...

Research square, 2020

A novel bio-nanocomposite, FeS encapsulated chitosan grafted polyacrylamide, was successfully syn... more A novel bio-nanocomposite, FeS encapsulated chitosan grafted polyacrylamide, was successfully synthesized using a grafting technique that employs microwave irradiation. Employing FTIR, SEM, XRD, TEM and SAED analysis, the synthesized nanocomposites were characterized. Thermodynamic and kinetic studies were accomplished using the batch mode via the eosin yellow adsorption from aqueous solution using the nanocomposite. The adsorption process was tailored to the pseudo-second-order kinetic model and the Freundlich isotherm model. The enthalpy change, ∆H° (-12.243 kJ/mol), was an exothermic process. The Gibbs energy, ∆G° (from -5.492 kJ/mol.K to -5.078 kJ/mol.K for temperatures from 300 K to 318 K respectively) values were indications of a thermodynamically feasible reaction process which was spontaneous within the temperature domain. The change in entropy, ∆S° (-0.023 kJ/mol), showed reduced randomness during the adsorption process. The mean free energy of adsorption was 0.408 kJ/mol, ...

Cogent Food & Agriculture

The use of herbicides in weed control is on the increase but such chemical residues in crop plant... more The use of herbicides in weed control is on the increase but such chemical residues in crop plants mostly cause health risks. The objective of this work was to determine the level of some herbicide residues in sweet potato. The sweet potatoes were cultivated in randomized complete block design (RCBD) with four replications at the Crops Research Institute Agronomy fields, Kwadaso, Ghana. The different treatments made up of combinations of five pre-emergence herbicides (butachlor [50 g/L-3 L/Ha], imazethapyr [240 g/L-3 L/Ha], metolachlor [333 g/L-4 L/Ha], pendimethalin [500 g/L-3 L/Ha] and terbutryn [167 g/L-4 L/Ha]) and one (1) postemergence herbicide (propaquizafop [100 g/L-1.2 L/Ha]) were applied. After harvest, samples were randomly selected and extracted using a modified QuEChERS extraction method followed by liquid chromatography-mass spectrometry (LC-MS) to determine the residual levels of the herbicides. The results showed that butachlor, imazethapyr, terbutryn and propaquizafop were not detected in their respective sweet potato samples analysed. However, pendimethalin and metolachlor residues were detected at concentrations of 0.0023 µg/g and 0.0029 µg/g, respectively. The findings suggest that the herbicide residue levels detected were ABOUT THE AUTHOR Yvonne A. Hormenoo (MSc) was a Graduate