Cross River University of Technology

About: Cross River University of Technology is a education organization based out in Calabar, Nigeria. It is known for research contribution in the topics: Population & Exergy. The organization has 465 authors who have published 507 publications receiving 2705 citations.

Haematological characteristics and plasma chemistry of an African Carp, Labeo coubie (Ruppell) in the Cross River, South Eastern Nigeria

Abstract: Haematological characteristics and plasma chemistry of the African carp, Labeo coubie , from an inland freshwater body, the Cross River in South Eastern Nigeria were investigated. Twenty-five specimens of Labeo coubie of mean weight 163.98 ± 116.65g and mean standard length 18.91 ± 3.91 cm were used to determine reference (physiological) haematological and plasma chemistry values for this species. The physical parameters of erythrocytes, leucocytes, haemoglobin concentration, haematocrit and erythrocytes sedimentation rate had values of 5.40 ± 0.70 (10 6 mm 3 ), 0.1176 ± 0.0064 (10 4 mm 3 ), 9.28 ± 1.20g/dl, 27.16 ± 3.72 % and 27.36 ± 8.49% respectively. The values of mean corpuscular volume, mean corpuscular haemoglobin concentration and mean corpuscular haemoglobin were 5042.10 ± 408.270 fl, 348.40 ± 45.63 g/dl and 1.71 ± 0.13 pg respectively. The plasma biochemical profile gave the following values: plasma sodium 10.66 ± 1.55 mM, plasma potassium 15.64 ± 3.27 mM, plasma chloride 1.77 ± 1.16 mM, plasma magnesium 3.39 ± 1.65 mM, plasma phosphorus 383.20 ± 183.73 mM, plasma glucose 48.69 ± 1.65 mg/dl and plasma albumin 4.16 ± 0.92 mg/dl. While a positive correlation was observed between some parameters (e.g. between erythrocytes and haemoglobin with r = 0.857 at P Keywords : haematology, Labeo coubie , erythrocytes, leucocytes, plasma, blood electrolytes Journal of Aquatic Sciences Vol. 21(1) 2006: 47-55

Determinants of Exchange Rate Instability in a Developing Economy: Conceptual Issues and Further Evidence from Nigeria (1970-2005)

Abstract: This study examines the determinants of exchange rate instability (volatility of Real Exchange Rate) in a developing economy. The cardinal focus is to ascertain the determinants of exchange rate volatility (instability) in a developing economy with particular reference to Nigeria as well as assess the implications of volatility of real exchange rate on selected macroeconomic variables. The study used ordinary least square (OLS) technique in relation to time series data on exchange rate instability (VRER), current account balance (CABY), import (IMPY), External Reserves (EXTRESS), inflation and economic growth (GDP). Instability of exchange rate is measured by three years moving average of standard deviation of real exchange rate. This paper advocates that besides the basic macroeconomic variables which are acknowledged as determinants of exchange rate instability a realistic exchange rate capable of accelerating economic growth, reducing import and also stemming the tide of inflation are paramount in a developing economy and should be maintained. Equally, carefully handling unbridled exchange rate in an import dependent economy which is capable of inducing price escalation is a sine qua non in the economy.

Evaluation of Impact of Some Selected Plants on Haematological Parameters of Testosterone and Estradiol Induced Benign Prostatic Hyperplasia Adult Male Rats

Abstract: Background: Benign prostate hyperplasia (BPH) is an age-related disease of unknown etiology, characterized by prostate enlargement. The effect of Prosopis africana (PA), Vernonia amydalina (VA) and Ocimum gratissmum (OG), plant extracts on haematological parameters of BPH animal model was investigated. Methods: BPH was induced in 45 male Wistar rats (250-350 g) by exogenous injection of testosterone and estradiol in staggered doses for 3 weeks. To confirm BPH induction, some animals Original Research Article Ugwu et al.; IBRR, 10(1): 1-15, 2019; Article no.IBRR.53052 2 were sacrificed; histological inspection of prostate gland and PSA was carried out. Forty BPH induced rats were divided into 8 groups. Group 1 and 2, 3 and 4, 5 and 6 were treated with 50 mg/kg bw and 100 mg/kg bw doses of PA, VA and OG extracts respectively. Group 7 received finasteride (0.1 mg/kg bw). Group 8 BPH control and five rats without induction constitute group 9, the normal control and both received distilled water. After 45 days, the rats were anaesthetised by a brief exposure to trichloromethane vapour and 5 ml of blood was collected from the rats through cardiac puncture and dispensed into well-labelled EDTA containers to avoid coagulation. All analyses were completed within 24 h of sample collection. Results: Results showed that induction of BPH caused a significant (P< 0.05) enlargement of prostate gland when compared to normal control. All extracts produced significant (P<0.05) reduction in the weight of the enlarged prostate when compared to the BPH control. There were significant (P ˂0.05) decline in RBC, PCV and Hb of BPH control when compared to the normal control and treated groups. In the treated groups the administration of the extracts and standard drug exhibited an increase in RBC, PCV and Hb concentration when compared with the BPH control. Also there was significant (P < 0.05) increase in the WBC, neutrophils, platelets, monocytes, lymphocytes and eosinophils levels in BPH control when compared to normal control and treated groups. In all treated groups there was significant decrease in WBC, neutrophils, platelets, monocytes, lymphocytes and eosinophils concentration levels when compared with the BPH control group. Conclusion: The result of this study indicates that the extracts have the potential to reverse the inflammation caused by BPH and also have the capacity to boost the numbers of red blood cells probably by inhibiting the hemolysis caused by inflammatory factors or by enhancing the production of red blood cell from the bone marrow.

Thermodynamic performance and environmental sustainability of adapted organic Rankine cycles at varying evaporator pressure

Abstract: Thermodynamic performance and environmental sustainability (ES) of adapted organic Rankine cycles (ORCs) at varying evaporator pressure (EVP) are presented. The paper assesses the most sustainable ORCs at varying EVPs. The modified ORCs apart from the generic cycle include the ORC-internal heat exchanger (IHE), ORC-turbine bleeding, and ORC-turbine bleeding and regeneration. The considered performance indicators are power output (POT), overall exergy efficiency and overall exergy destruction (OED), while the ES indicators comprise waste exergy ratio (WER), exergetic sustainability index (ESI) and environmental effect factor (EEF). From the results obtained the OEF, OED and POT for the ORCs ranged between , and , respectively, at EVP of 2 and 3 MPa. Similarly, WER, ESI and EEF ranged between , and correspondingly, for the same EVPs. The findings indicate the ORC-IHE and ORC-turbine bleeding and regeneration are more sustainable using the R113 than R141b refrigerant.