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.

Heavy metal profile of water, sediment and freshwater cat fish, Chrysichthys nigrodigitatus (Siluriformes: Bagridae), of Cross River, Nigeria.

Abstract: Cross River funciona como una fuente importante de agua potable, transporte, actividades agricolas y pesqueras en el Estado Cross River, Nigeria. Dado que no existe un control formal de los efluentes vertidos en el rio, es importante monitorear los niveles de metales contaminantes en el mismo, por lo tanto la evaluacion de su idoneidad para el uso domestico y agricola. Para la determinacion de lo anterior, tres estaciones de muestreo designadas como Ikom (Estacion I), Obubra Ogada (Estacion II) y Calabar (Estacion III) fueron seleccionadas al azar para el estudio. Se tomaron diez muestras de “Bagre de agua dulce de plata” (Chryshchythys nigrogitatus) de 29.4-39.5cm LE (longitud estandar) y 310-510g de peso, sedimentos y agua fueron recolectadas en cada estacion de muestreo de junio 2009 a junio 2010. Los perfiles de metales pesados de Zn, Cu, Fe, Co, Pb, Cd y Cr, en agua, sedimentos y musculos de peces fueron analizados por espectrofotometria de absorcion atomica (AAS). En los peces, la concentracion de metales pesados que se determino fue Cu>Fe>Zn>Cu>Pb>Cd>Co, para los peces se determino una mayor concentracion media de cobre (0.297±0.022g/g), cadmio (0.011±0.007μg/g), hierro (0.371±0.489μg/g) y plomo (0.008±0.008μg/g). En el agua, el orden se determino como sigue: Fe>Pb>Zn>Cu>Cr>Cd>Co, con una mayor concentracion promedio de hierro (0.009±0.00μg/g), cobre (0.015±0.01g/g), plomo (0.0002±0.00μg/g), cadmio (0.0006±0.001μg/g) y zinc (0.0036±0.003μg/g), se observaron en la superficie del agua, respectivamente. La mayor concentracion promedio de cobre (0.037±0.03μg/g), hierro (0.053±0.04μg/g), plomo (0.0002±0.00μg/g), cobalto (0.0002±0.00μg/g), cadmio (0.0006±0.001g/g) y zinc (0.009±0.0015μg/g) se observo en el agua del fondo. En los sedimentos, el orden de concentracion fue: Zn>Fe>Cu>Pb>Co>Cd, la mayor concentracion media fue de 0.057±0.04μg/g, 0.043±0.03μg/g, 0.0006±0.00μg/g, 0.0002±0.00μg/g, 0.0009±0.00μg/g y 0.099±0.00404μg/g para hierro, cobre, plomo, cobalto, cadmio y zinc, respectivamente, no se detecto cromo. La mayoria de los metales pesados por debajo de los niveles maximos permisibles establecidos por la OMS, FEPA y USEPA, con excepcion de zinc cuya concentracion media fue de 0.099±0.00404μg/g estuvo por encima del limite recomendado de 0.0766μg/g de EPA en el sedimento de la Estacion I (Ikom). Esto implica que la capacidad de asimilacion de residuos del rio es alta, un fenomeno que podria atribuirse a la dilucion, la sedimentacion y el intercambio continuo de agua. Lo cual es una indicacion de que efluentes vertidos en el Cross River por zonas urbanas e industriales tienen un efecto significativo en el equilibrio ecologico del rio. Asi, las especies de peces del Rio Cross son seguras para el consumo humano.

Bound state solutions of the generalized shifted Hulthén potential

Abstract: In this study, we obtain an approximate solution of the Schrodinger equation in arbitrary dimensions for the generalized shifted Hulthen potential model within the framework of the Nikiforov–Uvarov method. The bound state energy eigenvalues were computed, and the corresponding eigenfunction was also obtained. It is found that the numerical eigenvalues were in good agreement for all three approximations scheme used. Special cases were considered when the potential parameters were altered, resulting in Hulthen potential and Woods–Saxon Potential, respectively. Their energy eigenvalues expressions agreed with the already existing literature. A straightforward extension to the s-wave case for Hulthen potential and Woods–Saxon potential cases is also presented.

Antibacterial Properties of Snail Mucus on Bacteria Isolated from Patients with Wound Infection

Abstract: Background: Snail mucin has been reported to contain agents with wound healing properties. Mucin obtained from the mucus of snails and epiphgram obtained from species of Achatina fulica and Archachatina marginata have also been reported to show antimicrobial properties. Snail species are abundantly available and widely consumed as a delicacy across Nigeria. Aim: To assess the antibacterial effects of mucus secretions from different snail types on bacteria isolated from clinically infected wounds. Place and Duration of Study: The study lasted for a period of four (4) months and was conducted at the Microbiology laboratory of The Cross River State University of Technology in Cross River, Nigeria. Methodology: The in vitro antibacterial potency of snail mucus secretions obtained from Archachatina marginata saturalis, Archachatina marginata ovum and Achatina fulica on bacterial isolates from wound was investigated. The isolates obtained from twenty eight (28) clinical wound samples were Staphylococcus spp (24:53.3%), Pseudomonas spp (16:33.3%) and Streptococcus Original Research Article Etim et al.; BMRJ, 11(2): 1-9, 2016; Article no.BMRJ.21731 2 spp (6:13.4%). The susceptibility of the isolates to snail mucus secretions was assayed on Muller Hilton Agar by the disc diffusion method, using varied mucus/DMSO concentrations of 100%, 80%, 60%, 40% and 20%. The minimum inhibitory concentration and minimum bactericidal concentration of the mucus secretions were also evaluated. Results: The viscosity of the mucus secretions were rated as A. marginata saturalis> A. marginata ovum> A. fulica, while their colours were yellow, light brown and dark respectively. Results revealed that Staphylococcus sp was more susceptible to mucus secretion from the A. marginata saturalis (17.4±1.20) than those from A. marginata ovum (15.6±1.44) and A. fulica (15.4±2.04). The minimum inhibitory concentration of mucus secretions from A. marginata saturalis against the test organisms were observed at concentrations of 100% and 20% for Staphylococcus sp, 20% for Pseudomonas sp and 40% for Streptococcus sp respectively. The antibacterial activity of the mucus secretions were observed to be comparable to that of seven (7) different antibiotics used as control. Conclusion: Snail mucus secretions could be a source for antibacterial agents that can serve as an alternative to the expensive synthetic antibacterial agents used in wound treatment if adequately explored.