Sophie Nadège Gnangui

Kinetic and Thermodynamic Characterization of Latent and Activated Polyphenol Oxidase from Zrèzrou Yam (Dioscorea cayenensis rotundata) Cultivated in Ivory Coast for the Control of Enzymatic Browning

Judicael Kouamé, Sophie Nadège Gnangui, Mankambou Jacques Gnanwa & Lucien Patrice Kouamé · Biotechnology Journal International · 2026

In the Zrèzrou yam (Dioscorea cayenensis rotundata), cultivated in Côte d’Ivoire, polyphenol oxidase (PPO), the enzyme responsible for enzymatic browning, exists in latent and activated forms, whose properties were poorly documented. This study aims to conduct a detailed comparis...

Open access Research Article 10.9734/bji/2026/v30i2857

Isolation of a Latent Polyphenol Oxidase from Edible Yam (Dioscorea cayenensis-rotundata cv. Zrèzrou) Cultivated in Côte D’ivoire

Judicael Kouamé, Sophie Nadège Gnangui, Soumaïla Dabonné & Lucien Patrice Kouamé · Journal of Advances in Biology & Biotechnology · 2015

A polyphenol oxidase was purified to homogeneity from edible yam (Dioscorea cayenensis-rotundata cv. zrèzrou) cultivated in Côte d’Ivoire. The purification procedure consisted of ion-exchange, ammonium sulphate fractionation, size exclusion and hydrophobic interaction chromatogra...

Open access Research Article 10.9734/JABB/2015/15174

Biochemical Characterization of Two Polyphenol Oxidase Purified from Edible Yam (Dioscorea cayenensis-rotundata cv. Kponan) Cultivated in Côte d’Ivoire

Jocelyn Constant Yapi, Sophie Nadège Gnangui, Ahi Pascal Amedée, Soumaïla Dabonné & Lucien Patrice Kouamé · Annual Research & Review in Biology · 2014

Yam (Dioscorea cayenensis-rotundata cv. Kponan) is a staple food in many tropical regions. A biochemical characterization study of crude polyphenol oxidase from yam (PPO) was carried out to provide useful information for food processing operations. Two polyphenol oxidases of edib...

Open access Research Article 10.9734/ARRB/2014/9039