ABSTRACT: Students always ask the question, if there is such a strong electrostatic force of attraction between the nucleus and electrons at the lowest orbital as proposed by Bohr, how then does the electron orbit the nucleus without collapsing into it. This paper answers that question base on Neils Bohr's assumptions. The paper derives the speed of electrons on their orbits with respect to their orbital radius. This paper also explains why electrons at the higher orbital revolves the orbit a...
ABSTRACT In the present study, we investigated the prevalence of few bacterial organisms associated with urinary tracts infection and their antimicrobial susceptibility patterns. Total of Ninety (90) midstream urine samples were collected from outpatients with respect to their age group, gender and marital status attending health facility in Benue State University Teaching Hospital Makurdi. Each 0.1ml of urine sample was cultured on MacConkey agar and colonies showing lactose fermentation we...
Food industry wastes are an essential environmental contamination source. A large number of microorganisms including bacteria, yeast and fungi produce different types of enzymes like protease, lipase, chitinase, chitosan and ligninolytic enzyme having high biotechnological interest such as food processing, detergent, textile, pharmaceutical products, and medical therapy. Microbial synthesis of enzymes has been reported to be influenced by various factors such as carbon sources, nitrogen sourc...
Abstract: E-learning is being increasing viewed as an important activity in the field of distance and continuing education. Web-based courses offer obvious advantages for learners by making access to educational resource very fast, just-in-time and relevant, at any time or place. In this study, based on our previous work, we present a framework for our web-based e-learning system using the Semantic Web technology. In addition we present an approach for implementing a Semantic Web-based elear...
Abstract This study aimed at investigating the growth inhibitory effect of probiotic Lactobacillus on Candida species isolated from oral thrush of AIDS-defining ill patients. Clinical isolates of Candida species were obtained from Dalhatu Araf Specialist Hospital Lafia, Nasarawa State. de Man Rogosa Sharpe agar was used as starter culture for the isolation of Lactobacilli. The diameters of the antimicrobial assay were recorded using the following dilution in part per mL (1:10, 1:100, 1:1000,...
Street vended foods are the major source of food borne diseases in most parts of sub-Saharan Africa including Nigeria. In this study, six samples each of six different vended foods obtained in Calabar municipality were evaluated for bacteriological quality and presence of Staphylococcus aureususing standard microbiological techniques. Each food was examined macroscopically for evidence of spoilage, followed by culture isolation for Staphylococcus aureus. The organisms isolated were subjected ...
TABLE OF CONTENTS CONTENTS PAGES Certification--------------------------------------------------------------------------------------i Declaration---------------------------------------------------------------------------------------ii Dedication-------------------------------------...
Extracts of J. gossypifolia L. have been reported to have several medicinal values, including potential anti-cancer and anti-inflammatory properties. In this study, we investigated the anti-clastogenic and hepatoprotective, effects of the ethanolic leaf extract of J. gossypifolia L. in potassium bromate (KBrO3)-induced toxicity in rats. The general trend of the results indicates significant increases (p
We evaluated the brain, lung, and heart oxidative stress in rats exposed to aerosol of an over-thecounter pyrethroid insecticide product in Nigeria. The experimental animals were randomly divided into four groups: group I (control) was not exposed to the insecticide aerosol, while groups II, III, and IV were exposed to 6.0 mL m-3, 12.0 mL m-3, and 18 mL m-3 of insecticide ae...
Background: The current upsurge in the use of polyherbal remedies and coupled with loose regulation on public access to these products underscore research efforts to evaluate their biochemical effect, noting also that many of the polyherbal medicines lack scientific evidence to support their medicinal claims. Objective: We therefore investigated the potential genotoxicity, hematotoxicity and ...
TABLE OF CONTENTS CONTENTS PAGES Title page-----------------------------------------------------------------------------------------------------i Certification--------------------------------------------------------------------------------------------------ii Dedication--------------------------...
Extra-pulmonary oxidative stress investigations of exposure to aerosol, of an over-the-counter pyrethroid insecticide product in Nigeria in Wistar rats were carried out. Four groups of five animals each were used in this study, and were exposed to different concentrations of the insecticide aerosol. Malondialdehyde (MDA) and reduced glutathione (GSH) concentrations were determined in the live...
Introduction: Raw edible camphor (EC), and as component of herbal infusions are widely used to treat pile, back pain, erectile dysfunction, and as an aphrodisiac especially in preparation for sexual intercourse by men. It has been traced in umbilical cord, blood, fetal, adipose, and other tissues including brain, where it bioaccumulates. Methods: The study, therefore, investigated the possible histopathological changes in brain, heart, and spleen that may result following ...
Increasing environmental pollution in the tropics is creating a breeding ground for mosquitoes, leading to increasingly frequent use of insecticides to combat home infestation of mosquitoes, the vector of malarial parasites. Household members are therefore more prone to aerosol exposure and subsequent health effects. We assessed the hepatotoxic and clastogenic effects in rats exposed to different levels of aerosols of one of the insecticides most commonly in used in Nigeria. There were signif...
Ginger or Zingiber officinale has been reported to possess antioxidant activities that can protect against free radical damage. We therefore carried out this study to investigate the possible ameliorative effects of ginger against the clastogenicity, hepatotoxicity and oxidative stress induced by nitrobenzene (NB) administration in wistar rats. Twenty male wistar rats were divided into four g...