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 Usability of Polysulfone Membranes for Removal of Organic Dyes from Aqueous Solutions

Abstract: Polysulfone membranes were synthesized and their separation properties were studied to check the usability of this type of membranes in decolorizing aqueous solutions of organic dyes by ultrafiltration. The membranes were prepared from 15-percent (wt.%) polysulfone solution in dimethyl-formamide and formed on a glass support. The casting solution had different initial temperatures. The membrane thickness was between 50 and 115 μm. Experiments were carried out under static conditions and involved six organic dyes having molecular weights between 291 and 1048.2. The dye concentration in the aqueous solution was 100 gm−3. The pressure applied was varied between 0.5 and 2.5 MPa. Separation properties of the membranes were found to be better with thinner membranes and lower temperatures of the casting solution. The membranes arc capable of retaining 100 percent of organic dyes (of a molecular weight of above 800) irrespective of the casting parameters and of the pressure applied. The volume flows of dye solutions through the membranes varied from 0.05 to 0.20 m3m−2day−1 (at 2.5 MPa) depending on the casting parameters.

Abdominal pregnancy- a case report.

Abstract: A case of abdominal pregnancy in a 39 year old female gravida 4, para 0(+3) is presented. Ultrasonography revealed a viable abdominal pregnancy at 15 weeks gestational age. She was initially managed conservatively. Surgical intervention became necessary at 20 weeks gestational age following Ultrasound detection of foetal demise. The maternal outcome was favourable. This case is presented to highlight the dilemma associated with diagnosis and management of abdominal pregnancy with a review of literature.

Antifungal Activities of Curry Leaf (Murraya Koengii) Extract on Some Selected Fungi

Abstract: Studies on the antifungal activity of aqueous and organic extracts of Murraya koeingii (curry leaf) on fungi was undertaken using Candida albicans, Penicillium funiculosum, Penicillium camemberti, Aspergillus niger as test organisms. Aqueous and organic extracts of the plants were obtained using standard techniques. The extracts were Cold aqueous extract (CAE), hot aqueous extract (HAE) and Ethanol extract (EE). Sensitivity test was carried out using Agar Well Diffusion Method; the set up was incubated at 37 0 c for 24 hours. Development of zones of inhibition was observed and measured. This showed that some of the tested extracts demonstrated antifungal activities against the test organisms. Comparison of the extracts showed that Ethanol aqueous extract (EE) of Murraya koengii had high activity against all test organisms. The Minimum Inhibitory Concentration of Cold, Hot and Ethanol extracts of Murraya koenigii was 20g/ml for all the test organisms.Since the Cold and Hot extracts did not demonstrate high activity on the test organism, it could be concluded that the activity demonstrated by both Cold and Hot aqueous extract was due to the effect of the extracts. These results indicate that Murraya koengii can be used as an antifungal agent in the treatment of infections. Keywords: antifungal, fungi, murraya koeingii (curry leaf), organisms, organic extract

OVIPosmON DETERRENT EFFECf OF EXTRACfS OF NEEM AGAINST ATHERIGONA ORIENTAUS (SCHINER) ON PEPPER (CAPSICUMANNUM) AND TOMATO (LYCOPERSICON ECSULENTUM) FRUITS IN NIGERIA

Abstract: With the avalanche of synthetic insecticides and their misuse, studies on the use of neem plant parts namely, neem leaves (NL), neem barks (NB), neem roots (NR), neem leaf, bark and root combination (NLBR) and neem seed kernel power (NSKP) extracts were evaluated for oviposition deterrence on pepper and tomato fruits against Atherigona orientalis (Schiner). A 2% solution of each of the neem plant part extracts when applied individually was effective against the pest on both pepper and tomato fruits. A combination of neem leaf, bark and root was more effective than the individual neem plant parts. A 2% Neem seed kernel powder was significantly more effective than other neem plant parts and also significantly offered the highest relative protection (RP) to pepper and tomato fruits. Percentage RP followed this order: NSKP>NLBR>NR>NB>NL.