Rivers State University of Science and Technology

About: Rivers State University of Science and Technology is a education organization based out in Port Harcourt, Rivers, Nigeria. It is known for research contribution in the topics: Population & Threatened species. The organization has 1826 authors who have published 1833 publications receiving 15183 citations.

The structure of strong hydromagnetic shock waves in a thermally-radiating gas

Abstract: The structure of strong shock waves in a thermally-radiating and electrically-conducting fluid is studied by method of asymptotic matching principle. It is assumed that upstream of the shock the gas is cold and does not radiate thermally while the Mach number (M) is very high so that after being shocked the gas now thermally radiates. The viscosity of the gas (μ) depends on temperature (T) in the simple manner μαTω where ω is a constant exponent. The problem is worthy of note in high-temperature phenomena in hypersonic flow.

Urban Growth Influence on Land Cover Dynamics across Obio/Akpor Port Harcourt, Nigeria

Abstract: The study examined urban growth and land cover dynamics across Obio/Akpor, Local Government Area Rivers State. Landsat images were derived for the period of 1986 which was regarded as the base year, 2010 and 2018. The images were imported and analyzed using the spatial analysis tools in the ArcGIS environment to determine the extent of growth induced by change in features (water bodies, swamp forest, other forest, and Anthropogenic/built-up) coverage across the region. Findings revealed that there was a continuous decrease in the areas covered by water bodies, swamp forest, and forest between the periods of 1986 through 2010. It also revealed an increase in anthropogenic activities during the same periods of 1986 through 2018. As at 2018, as compared to 1986 which serves as the base year, there was a noticeable decrease in land area covered by water, in the tune of 13.946 sq km in 2018 as against 20.433 sq km in 1986 amounting to 68 percent decrease in surface covered by water bodies. Also, as at 2018, as compared to 1986 there is a noticeable decrease in the surface covered by swamp and other forest types in the tune of 18.102 and 99.693 sq km respectively as compared to 4.,986 and 17.498 sq km of surface cover respectively. On the other hand anthropogenic altered surfaces had a level of increase in the Original Research Article Ogoro et al.; AJARR, 13(4): 1-11, 2020; Article no.AJARR.58732 2 area covered by Anthropogenic/built-up developmental activities as at 2018 amounting to a tune of 14.399 sq km of surface area altered by anthropogenic activities as at 2018 as compared to 38.267 sq km of surface cover altered by human activities as at 1986 which when compared gave an increase in area covered by anthropogenic activities indicating an increase of over 100 percent between the base year of 1986 through 2018.

Effects of Cashless Economy Policy on National Development: Evidence from Nigeria

Abstract: Prior to this time, Nigeria economy was largely described as cash and paper based economy with significant proportion of the narrow money stock in form of currency outside the banking system In a bid to drive national development, modernization of payment system and to limit the practice of the use of cash in business transaction in line with the global economy, the Central Bank of Nigeria introduced the cashless policy in January 2012 as a pilot scheme in Lagos Since the declaration of cashless policy, there has been controversy in the academia with respect to the effects on national development some scholars believes it benefits outweigh it challenges and vice versa Based on this therefore, this study seeks to assess the effects of cashless economy policy on national development in Nigeria The study reveals cashless policy has promoted effective and improved monetary policy, efficient and fast payment system, job creations and increased technological infrastructures The study suggests that government should promote efforts that will encourage cashless policy in Nigeria

Assessment of Blood Storage Effect Using CPDA-1 on Packed Cell Volume, Oxyhaemoglobin and Methaemoglobin in Different ABO/Rhesus Blood Types

Abstract: Aims: The aim of this study is to determine the effect of blood storage using CPDA-1 on packed cell volume, methaemoglobin and oxyhaemoglobin in different ABO/Rhesus blood types donated by some residents of Port Harcourt, Rivers State, Nigeria. Study Design: This is a comparative study aimed at evaluating the effect of storage on the levels of methaemoglobin, oxyhaemoglobin and packed cell volume using CPDA-1. A total of eight donors were recruited with each sample obtained from the eight (8) known blood groups A+,B+,O+,AB+, A-,B-,O-,AB- and analysis of samples were in triplicate. The donors were adult males with age ranging from 35-45 years and they were apparently healthy and free from transfusion transmissible infections. The different blood group samples were stored for 30 days and samples for analysis were collected at 5 days interval. Place and Duration of Study: The study was conducted in Port Harcourt, Rivers State, Nigeria. All blood donors were residents of Port Harcourt. Blood donated was stored at Military Hospital Blood Bank, Port Harcourt, in a blood bag of 450 ml containing 63 ml of citrate phosphate dextrose adenine-1 (CPDA-1). The analysis was carried out at Rivers State University, Post Graduate Laboratory within March 1st to May 27th, 2019. Methodology: A total of eight (8) different ABO/Rhesus blood types (A+,B+,AB+,O+,A-,B-,AB- and O-) were collected and stored using a blood bank refrigerator at temperature of 4°C. Day 0 was taken to be control and 5 days intervals in-between to day 30 acted as the test. Packed cell volume was estimated using micro-haematocrit method while oxyhaemoglobin and methaemoglobin levels were estimated spectrophotometrically as described by Evelyn and Malloy. Results: The result showed a significant decrease in mean packed cell volume, oxyhaemoglobin and methaemoglobin levels compared to a higher mean of these parameters in the control; and these differences were statistically significant (p<0.05) across all blood groups under study. The decrease in values were as a result of haemolysis that occurs during storage. Conclusion: Storage of blood irrespective of the blood group type using CPDA-1 for 30 days indicates that there are “storage lesions”. This is attributed to red cell haemolysis and ageing of red blood cells. In general, all blood types showed no significant difference in their haematological (packed cell volume, methaemoglobin, oxyhaemoglobin) characteristic deterioration or storage lesion based on blood type differences. It is therefore necessary to state that storage lesion characteristics are the same irrespective of the blood type, and that fresh blood be transfused, and if blood is stored, prolonged storage beyond 10 days should be avoided.