Emmanuel E. Essien

Chemical Composition and Antioxidant Property of Two Species of Monkey Kola (Cola rostrata and Cola lepidota K. Schum) Extracts

Emmanuel E. Essien, Nimmong- uwem S. Peter & Stella M. Akpan · European Journal of Medicinal Plants · 2015

Aims: To determine the total phenols content and antioxidant activity of Cola rostrata and C. lepidota seeds and fruit pulp methanol extracts. Study Design: In vitro evaluation of antioxidant assays; phytochemical screening, quantitative determination of total phenolics and flavo...

Open access Research Article 10.9734/EJMP/2015/15976

Solvent and Methyl Group Effects on the Electronic Spectral Properties of Azo-2-Naphthol Dye

Victor N. Mkpenie & Emmanuel E. Essien · Chemical Science International Journal · 2015

The influence of solvent polarity on the absorption pattern of azo-2-naphthol dyes,1-(4-methylphenylazo)-2-naphthol (MPAN) and 1-phenylazo-2-naphthol (PAN) have been studied using a UV-Visible spectrophotometer in polar and non-polar solvents. Analysis of the spectral data obtain...

Open access Research Article 10.9734/ACSJ/2015/17260

Antioxidant Capacity of Phenolic from Seed Extracts of Lagenaria siceraria (Short-Hybrid Bottle Gourd)

Bassey S. Antia, Emmanuel E. Essien & Blessing I. Udoh · European Journal of Medicinal Plants · 2015

Aims: To evaluate the antioxidant components and antioxidant activities of seed extracts of Lagenaria siceraria (Short-Hybrid Bottle Gourd). Study Design: In vitro assessment of antioxidant assays; quantitative determination of phenolic phytochemicals in seed extracts of short-hy...

Open access Research Article 10.9734/EJMP/2015/18242