Featured Papers

done_all Biological Sciences

  • library_books

    Application of Potassium Impregnated Calcium oxide/Magnesium oxide Catalyst for Transesterification of Jatropha curcas oil with methanol

  • person_outlineAuthor(s): Ibrahim H, Hayatudeen A, Yunusa S,
  • subjectCategory: Biological Sciences
  • access_time25 September, 2018
  • keyboard_arrow_downRead Abstract

    Biodiesel production using homogenous catalysts associates with high energy consumption and production cost due to the complicated separation and purification of the products. In this investigation, a solid base catalyst, 10%K-CaO/MgO was synthesized, analyzed and used to produce biodiesel from Jatropha curcas oil with methanol. The catalyst loading was 0.4 % mass of the oil while the transesterification times were 20, 30, 40, 50 and 60 minutes at 60oC. The methyl esters yields were 94.20, 92.00, 82.13, 82.81 and 82.09 % respectively. There was no glycerol in any of the five products. Transesterification time of 20 minutes was found to be enough to produce biodiesel. The catalyst used in this study was capable of producing biodiesel without co-product glycerol.  This process is less expensive compared to homogenous process.

  • library_books

    Photometric Determination of Macro-Micro Minerals in West African Mud Creeper, Tympanotonus fuscatus var radula (Linnaeus, 1758)

  • person_outlineAuthor(s): Moruf RO, Akinjogunla VF
  • subjectCategory: Biological Sciences
  • access_time25 September, 2018
  • keyboard_arrow_downRead Abstract

    The flesh and shell of the West African Mud creeper, Tympanotonus fuscatus var radula from Abule-Eledu Creek were analysed by Flame and Atomic Absorption Spectrophotometry for their contents of the macro-minerals: calcium, phosphorus, magnesium, sodium and potassium, and the micro-minerals: iron, zinc, copper, manganese, chromium, lead  and cadmium. The highest macro-mineral was phosphorus; 86±14.15 mg/100g in flesh and 67.05±18.85 mg/100g in shell, while the least was magnesium; 19.58±0.96 mg/100g in flesh and 35.3±0.64 mg/100g in shell. The shell of the investigated periwinkle was significantly higher (p<0.05) in content of calcium, magnesium and potassium than in the flesh. The concentrations of micro-minerals; copper (1.25 mg/100g), zinc (0.76 mg/100g), chromium (0.06 mg/100g) and iron (6.00 mg/100g) in the flesh samples were higher than the concentration in the shell and consequently higher than FEPA standard limits of these elements in sea food. It has been observed that Tympanotonus fuscatus var radula from Abule-Eledu Creek could provide a significant proportion of needed inorganic nutrients; these relatively high concentrations of trace metals give certain restrictions on the dietary intake.

  • library_books

    EVALUATION OF EFFICACY OF TEN HERBAL SPERM BOOSTERS USING MALE SWISS ALBINO MICE AS EXPERIMENTAL MODEL

  • person_outlineAuthor(s): Iroanya OO, Adewole HA, Nwoko CL, Folarin OA, Adelabu MA
  • subjectCategory: Biological Sciences
  • access_time3 April, 2018
  • keyboard_arrow_downRead Abstract

    Infertility in humans has rapidly increased prompting researchers to screen herbal extracts and formulations to improve fertility. The aim of this project is to ascertain the efficacy of Addyzoa and some local herbal fertility enhancers on sperm and their effects on some biochemical parameters. Adult Swiss albino male mice were placed in 11 cages of 5 animals each. Animals in cage 1 were administered only water i.e. control group, group 2 was administered Addyzoa, an Ayurvedic fertility enhancer while animals in groups 3 to 11 received local herbal fertility enhancers at different concentrations for 45 days. On the 46th day, the animals were sacrificed. Some sperm and biochemical parameters were assayed. In groups 3, 6 and 11, the animals showed significant (P≤0.05) increase in sperm count while groups 6 and 11 exhibited significant (P≤0.05) increase in sperm motility compared to groups 1 and 2. Photomicrographs showed different sperm morphological aberrations. ALP levels of groups 3, 4 and 6 was significantly (P˂0.05) low while ALT concentration of groups 7 and 11 was significantly (P˂0.05) low compared to group 1. Group 1 showed significant (P˂0.05) increase in AST concentration compared to groups 7, 8 and 10. These results suggests that the herbal boosters administered to groups 3, 6 and 11 improved the quality and quantity of sperm possibly by enhancing asthenozoosermia, increased sperm formation thereby increasing oligozoospermia, supporting and  improving teratozoospermia and size thereby preventing DNA damage to sperms.

  • library_books

    DETECTION OF VAN C IN SOME ENTEROCOCCUS SPP. ISOLATED FROM A TERTIARY HOSPITAL IN ABUJA, NIGERIA.

  • person_outlineAuthor(s): Ndubuisi JC, Olonitola OS, Olayinka AT, Jatau ED.
  • subjectCategory: Biological Sciences
  • access_time20 December, 2017
  • keyboard_arrow_downRead Abstract

    This study investigated the presence of van C, a vancomycin resistant gene in some Enterococcus spp. isolated from clinical samples from National Hospital, Abuja (NHA), a tertiary hospital in Abuja, Nigeria. The samples collected for the research included stool, urine, wound and environmental swabs which were cultured on bile esculin azide agar and the isolates were identified with microgen test kit. The susceptibility testing was done with vancomycin disks. Isolates that were resistant to vancomycin by Kirby-Bauer disk diffusion method were selected for minimum inhibition concentration using E-test strips. Their DNA was extracted to determine the presence of van C genes in 17 of the isolates having MIC of ≥ 4µg/ml and ≤ 8µg/ml. The van genes present were amplified by polymerase chain reaction.

  • library_books

    Haematological responses to stress of transportation and acclimation on the African catfish, Heterobranchus bidorsalis (Geoffrey, Saint Hilare)

  • person_outlineAuthor(s): Okafor AI
  • subjectCategory: Biological Sciences
  • access_time18 December, 2017
  • keyboard_arrow_downRead Abstract

    Stress due to transportation and one week laboratory acclimation on the African catfish, Heterobranchus bidorsalis procured from New Calabar River, Aluu in Rivers State  of  Nigeria caused significant reduction of Red Blood Cell (RBC), Blood Platelet (BP) counts, Packed Cell Volume (PCV) as well as haemoglobin contents (HC ) p<0.05. Conversely, stress of transportation and acclimation led to significant elevation of total leucocyte (TL) counts, mean corpuscular volume (MCV) indices, blood osmolality and glucose levels (p<0.05).The reduction in erythrocyte and thrombocyte counts is as a result of reduced activity of haematopoietic organs due to stress of transportation and acclimation. The elevated glucose and white cell counts is attributed to alarm reaction, preparing the fish to defend itself against invading pathogens. Consequently, the body builds up a reserve of energy which ought to be expended. The stress of transportation and acclimation (handling, sorting, injury, overcrowding,) and poor water quality normally damage the mucous or slime layer that surrounds the fish. Under such a circumstance, H. bidorsalis, being a freshwater species, absorbs much of the acclimation water and this contributes substantially to the reduced haematocrit and elevated osmolality observed.

  • library_books

    AN ASSESSMENT OF THE USE OF VARYING LEVELS OF MORINGA OLEIFERA LEAF MEAL AS A SUBSTITUTE FOR VITAMIN + MINERAL PREMIX IN FINISHER BROILER DIET.

  • subjectCategory: Biological Sciences
  • access_time26 November, 2016
  • keyboard_arrow_downRead Abstract

    One hundred and twenty (120) 4 weeks old unsexed broiler chicken were used in a twenty eight days feeding trial to evaluate the use of Moringa oleifera leaf meal as a replacement for vitamin + mineral premix in finisher broilers. The birds were assigned to four treatment group with three replicates per group .The treatment groups includes T1, T2, T3, and T4  representing 0, 2.5, 5.0 and 7.5% inclusion levels of Moringa oleifera leaf meal as a replacement for vitamin + mineral premix. The result of the study showed that average final weight gain,  average feed intake and feed conversion ratio differed significantly (P<0.05) in favour of T4 and T3 .The dressing percentage as well as organ (gizzard, liver and heart) weights also differed  significantly(p<0.05). The study thus indicate that the inclusion of Moringa oleifera leaf meal at 5% and 7.5% can successfully be used to replace vitamin + mineral premix in  finisher diet.

ER-Journal is now indexed in: