Kinetics and thermodynamics of bleaching process in aqueous solution using sodium hypochlorite

The kinetics of bleaching process of oxidation of typical dye with a bleaching agent - sodium hypochlorite in aqueous medium was studied. The kinetic runs were executed using spectrophotometer to changes in concentration under pseudo first order whereby concentration of NaOCl was in large excess compared with the concentration of dye. The factors affecting the reaction rate that were studied include the concentration of dye and oxidant, temperature, ionic strength and pH of the bleaching reaction medium and the presence of a variable valence metal ion The result shows that the rate of oxidation increases with increasing in temperature, ionic strength and pH. Increasing in substrate and oxidant concentrations also increase the rate of oxidation. Higher observed rate constant k1 was obtained in the presence of Fe(III)ion. The Arrhenius activation energy for the oxidation in the absence and presence of Fe(III)ion are 56.21 kJmol-1 and 51.21 kJmol-1 respectively. The result of thermodynamic parameters such as the lowering of activation energy (Ea) and the higher value of second rate constants k2 in the presence of Fe (III) ion provide further support for Fe (III) ion enhancement of rate of oxidation

Physico-Chemical Evolution, Gill Mda Concentration And Histology Of Tilapia Exposed To Mixed Effluent In Okrika River, Rivers State, Nigeria

The physico-chemical evaluation and histological studies on Tilapia (Oreochromis niloticus) exposed to mixed effluent (industrial, domestic and municipal) from Okrika River were investigated. Tilapia samples were collected at about 500 meters from point of entry of mixed effluent into the River (downstream) and about 1.5 kilometers from the point of entry of mixed effluent into the River (upstream) while Tilapia from a fish pond affiliated to Rivers State Sustainable Development Authority (RSSDA) was used as control. Malondialdehyde (MDA) concentration was assayed in the gill homogenates in the Tilapia fish blood serum. It was observed that the biological oxygen demand (BOD), total dissolved solids (TDS), total suspended solids (TSS), conductivity, chromium and cadmium were significantly higher in concentrations in the Okrika River exceeding FEPA regulations in Nigeria. Aside chromium whose concentration was more upstream of the river, BOD, TDS, TSS, conductivity and cadmium show more concentration downstream of the river. Results showed an increase in gill MDA concentration upstream samples (0.00±0.00 to 1.51± 0.24nm/mg), downstream samples (1.51±0.24 to 2.32±0.66nm/mg) and the control samples (2.32±0.66 to 2.70±0.89nm/mg). No significant change was also observed in gill MDA concentration of both downstream and upstream samples when compared with the control. Histology of the gill showed vacuolar degeneration, focal areas of necrosis and aggregation of inflammatory cells between the hepatocytes. From the investigation, the mixed effluents discharged into the river are toxic to the marine environment. Key words:  Physico-chemical, Histological, Effluent, Malondialdehyde and Tilapia

Artificial Intelligence (AI): The Christian Perspective

The issues and concepts of providing machines that imitate or duplicate the function of the human brain, and sometimes fool humans have been the trend of the field of Artificial Intelligence (AI). This paper explains various schools of thought comparing machines to humans, as well as highlighting some basic limitations of AI. It presents a Christian biblical perspective that shows that intelligence or natural intelligence is a gift from God; who holds the answers to the mysteries or orders, coordination and cognition. Keywords: God, Man, Creation, Artificial Intelligence, Machine, Christian, Limitation

The Multi-Tasking Role of Non-Teaching Staff in an E-Learning Programme of a Dual Mode Institution- Babcock University

The success of any dual mode institutions cannot be permutated without the supporting role of non-teaching staff. Today, millions of people are enrolled as students in dual mode institutions all over the world and Nigeria is not left out. The number of qualified candidates who cannot be absorbed into the Nigerian tertiary institutions keeps soaring yearly. This paper examines the multitasking role of non-teaching staff in dual mode institutions, benchmarks for  dual mode instutions, and why Babcock University is keying into it and made robust recommendations which include making available training and retraining of staff, stable power upply and High-Speed Internet services which will make for an excellent e-Learning experience(Dual Mode). Keyword: Multitasking Role, E-Learning, Dual Mode Institution

PARTUM AND POST-PARTUM BEHAVIOURS OF WEST AFRICAN DWARF DOES AND KIDS

Seventeen West African Dwarf does housed intensively were used for this study. Does were naturally mated and pregnancy was confirmed by non-return to oestrus. The predicted parturition date was calculated. Two days to the predicted date of parturition, the does were closely monitored until the day they actually kidded. The behaviours of the does (duration of parturition, and latency to groom kids) and the kids (latency to stand) were recorded. Data were subjected to independent T-test of SPSS statistical package. The mean duration of parturition in WAD does was 9.5±2.65 min and the latency of kids to stand was 10.5±3.45mins. Duration of parturition was greater (P<0.05) in the 1st than 2nd parity does. A significant negative correlation was established between parity and duration of parturition (r =-0.635, P˂0.05). Kids from 1st parity does stood up earlier (P<0.05) compared to those from the 2nd parity does. A positive correlation was established between parity and the latency of the kids to stand (r = 0.598, P˂0.05). In conclusion, the duration of parturition and latency of kid to stand were not affected by the sex of the kid delivered, however WAD does groomed female kids earlier than the male kids.    &nbsp

Effects of Englerina drummondii Balle ex Polhill and Wiens leaves extract on selected female rat organs’ weights

Background: Herbal medicine are patronized by several people across the globe This herbal medicine is routinely use and are more accessible and available. This study aimed to investigate the effects of Englerina drummondii Balle ex Polhill and Wiens leaves on rat organs (thyroid gland, kidneys, ovary and fallopian tubes) weights in female rats. Methods: 20 female rats were selected randomly into 4 groups with 5 rats per group. Group 1 received 5 ml/kg of water, group 2 received extract 100 mg/kg, group 3 received extract 200 mg/kg, and group 4 received extract 400 mg/kg. Administration of extract was done for 28 days. Results: The study revealed significance decreased in the weight of the left ovary organ when extract of medium dose (200 mg/kg) and high dose (400 mg/kg) was administered, as compared to control. The result also shows decrease in the organs weight of the thyroid gland, left kidney, right and left fallopian tubes extract of low, medium and high dose were administered. The right kidney shows increase when low dose extract was given but decrease when both low and medium dose of extract was given. However, this decrease is not significance and could be due to dose or time dependent. Statistical analysis was done using statistical package for the social sciences (SPSS) version 23 and p<0.05 was significant. Conclusions: There was significance decreased in the weight of the left ovary organ when extract of medium dose (200 mg/kg) and high dose (400 mg/kg) was administered. Also, there is decrease in other organs weight when low, medium and high dose was given but not significance

Socioeconomic dynamism and the growth of baby factories in Nigeria

Abstract: Illegally breeding babies for marketing purposes otherwise known as “infant commodification” is increasing in Nigeria. This menace is a vice that threatens the lives and wellbeing of babies, young girls, and women. This article investigates through an in-depth review of scholarly publication and media coverages the factors that have contributed to the emergence and growth of the illicit industry in Nigeria. It examines the role of cultural beliefs, social attitudes, and norms as well as the harsh economic conditions of the nation as factors playing pivotal roles in the continual growth of baby farming in Nigeria. Some of these sociocultural factors are social stigmatization of pregnancy outside wedlock, stigmatization of adopted children, and the importance attached to fertility and the demonization of childlessness. The article draws on Emile Durkheim anomie theory and Chambers dimensions of poverty to explain how breakdown within the nation’s socioeconomic structure has a concomitant impact in breading social vices. It concludes by recommending that there is a need to jettison stigmatizing sociocultural beliefs within the nation’s social fabrics. Responsive attitude toward family reproductive issues should be encouraged and finally the activities of health care providers, operators of nongovernmental organizations taking custody of babies and young girls be properly monitored. As well, stringent punishment be meted out to apprehended operators of these baby farms to serve as deterrent to others

Genetic Determinants of Drug-Resistant Tuberculosis among HIV-Infected Patients in Nigeria

Tuberculosis (TB) is the most common opportunistic infection in human immunodeficiency virus (HIV)-infected patients and the emergence of drug-resistant tuberculosis (DR-TB) is a growing problem in resource-limited settings. Adequate infrastructure for testing drug sensitivity and sufficient evidence of first-line resistance are currently unavailable in Nigeria. We collected sputum samples from HIV-infected patients enrolled in the Harvard PEPFAR/APIN Plus program over 12 months at two PEPFAR antiretroviral therapy (ART) clinics in the southwest and north central regions in Nigeria. Smear-positive sputum samples were submitted for GenoType MTBDRplus testing (n = 415); mutations were confirmed through sequencing. Our results show high rates of DR-TB in Nigerian HIV-infected individuals (7.0% for rifampin [RIF] and 9.3% for RIF or isoniazid [INH]). Total RIF resistance indicative of MDR-TB in treatment-naive patients was 5.52%, far exceeding the World Health Organization predictions (0 to 4.3%). RIF resistance was found in 6/213 (2.8%) cases, INH resistance was found in 3/215 (1.4%) cases, and MDR-TB was found in 8/223 (3.6%) cases. We found significantly different amounts of DR-TB by location (18.18% in the south of the country versus 3.91% in the north central region [P < 0.01]). Furthermore, RIF resistance was genetically distinct, suggesting possible location-specific strains are responsible for the transmission of drug resistance (P < 0.04). Finally, GenoType MTBDRplus correctly identified the drug-resistant samples compared to sequencing in 96.8% of cases. We found that total DR-TB in HIV-infection is high and that transmission of drug-resistant TB in HIV-infected patients in Nigeria is higher than predicted

Exercise has a positive impact on bone mineral density in seropositive human immunodeficiency virus: do health professionals know?

Introduction: Despite the concomitant negative effects of human immunodeficiency virus on bone mineral density in HIV-infected persons, studies on knowledge of effect of exercise on this health parameter in HIV population among health professionals seem unavailable. This study therefore examined knowledge on effect of exercise on BMD in HIV-infected persons among health professionals. Material and methods: This cross-sectional survey employed researcher designed, experts - validated questionnaire to enroll 434 respondents. The reliability coefficient “r” of the questionnaire was 0.75 with 92% response rate. Descriptive and inferential statistics were used to summarize and analyze the data respectively. The alpha value was set at 0.05. Results: Age range and mean age in years of the respondents were 21–59 and 35.88 ± 9.09 respectively; age group of 30–39 years predominated (45.3%). Males were in preponderance (52.4%), and most (74.4%) were married; while majority (54.7%) were nurses. Substantial proportion (54.2%) had less than good knowledge on the subject examined in this study. Significant difference (p 0.05). Conclusions: Knowledge on effect of exercise on BMD in HIV infected persons among health professionals was surprisingly below expectation, and therefore should be seen as a cause for concerned exercise scientists and public health experts