Nitrate reduction by commercially available nitrate reductases: bio-catalytic potentials and enzymatic activities in the presence of metals ions.

Commercially available nitrate reductases from corn, Aspergillus niger, and Escherichia coli have the potential to mitigate excess nitrate in soils and water sources. In this study, in vitro experiments were conducted to evaluate nitrate reduction by commercially available nitrate reductases from three major sources (plant, fungi and bacteria), their biocatalytic potentials and activities in the presence of varied concentrations of Cd(2+), Cu(2+), Ni(2+), Co(2+), Cr(6+), Fe(2+), Zn(2+), and Pb(2+). The results showed that the activity, V (max), and potential to reduce nitrate was in the order: corn > A.

The prevalence of Candida albicans-associated diarrhoea in Buea, South West Cameroon.

A total of 362 stool specimens were collected from 184 and 178 patients presenting at the Buea district Hospital with and without diarrhoea, respectively. The samples were screened and cultured for Candida albicans using standard microbiological procedures. Of the 184 diarrhoeic stool cultures, 35.