Proximate composition of frog (Dicroglossus occipitalis) and acute mudsnail (Viviparous contectus)

In this work, the proximate composition and mineral content of fresh water frog (Dicroglossus occipitalis) and acute mud snail (Viviparous contectus) were studied. This was done in accordance with AOAC standards to gain insight into the health benefits of the samples. Results show that these samples contained acceptable concentrations of crude lipids, crude protein, fibre, nitrogen free extract, calcium, magnesium, iron and zinc implying that frog and acute mud snail could be used as good sources of nutrient and minerals for human diet and animal feed production. Also, the drying rates as a function of drying temperatures (60, 80, and 100oC) for both samples shows that they all dried faster as temperature was increased. However, a drying temperature of 80oC is recommended as both samples presented better dried product at this temperature.Keywords: mineral content, proximate composition, frog, acute mud snail, temperatur

Drying kinetics of pre-osmosed fresh water frog (Dicroglossus Occipitalis)

The drying kinetics of frog (Dicroglossus occipitalis) was conducted using convective oven dryer. The results were fitted into three thin-layer models; Lewis, Henderson and Page models. The constants and coefficients of the various models used were evaluated using non-linear regression methods, and the results show that the Henderson model is the best for predicting the drying behaviour of frog and was followed by Lewis model. Furthermore, the drying was discovered to have taken place during the falling rate period and the effective moisture diffusivity was determined using Ficks second law and the values ranged from 8.094x10-8m2/s to 1.102x10-6m2/s. The temperature dependence of effective moisture diffusivity obeyed the Arrhenius Law with activation energy of 45.6kJ/mol. http://dx.doi.org/10.4314/njt.v35i4.3

Comparative Study of Inhibitors on the Corrosion of Mild Steel Reinforcement in Concrete

Rosana G. Moreira, Editor-in-Chief; Texas A&M UniversityThis is a paper from International Commission of Agricultural Engineering (CIGR, Commission Internationale du Genie Rural) E-Journal Volume 9 (2007): Comparative Study of Inhibitors on the Corrosion of Mild Steel Reinforcement in Concrete. Manuscript BC 06 008. Vol. IX. June, 2007

Synergistic effect p-phenylenediamine and n,n diphenylthiourea on the electrochemical corrosion behaviour of mild steel in dilute acid media

Electrochemical studies of the synergistic effect of p-phenylenediamine and n,n diphenylthiourea (TPD) as corrosion inhibitor of mild steel in dilute sulphuric and hydrochloric acid through weight loss and potentiodynamic polarization at ambient temperature were performed. Experimental results showed the excellent performance of TPD with an optimal inhibition efficiency of 88.18 and 93.88 %in sulphuric and 87.42 and 87.15 %in hydrochloric acid from both tests at all concentration studied. Polarization studies show the compound to be a mixed-type inhibitor. Adsorption of deanol on the steel surface was observed to obey the Langmuir and Frumkin isotherm models. X-ray diffractometry confirmed the absence of corrosion products and complexes. Optical microscopy confirmed the selective inhibition property of TPD to be through chemical adsorption on the steel surfac

An Evaluation of Septic Tank Performance in Bayelsa State, Nigeria

Rosana G. Moreira, Editor-in-Chief; Texas A&M UniversityThis is a paper from International Commission of Agricultural Engineering (CIGR, Commission Internationale du Genie Rural) E-Journal Volume 9 (2007): An Evaluation of Septic Tank Performance in Bayelsa State, Nigeria. Manuscript BC 06 009. Vol. IX. June, 2007