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  1. Article ; Online: Optimization of the mechanical properties of polyester/coconut shell ash (CSA) composite for light-weight engineering applications.

    Daramola, O O / Akinwande, A A / Adediran, A A / Balogun, O A / Olajide, J L / Adedoyin, K J / Adewuyi, B O / Jen, T C

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 1066

    Abstract: The mechanical properties of coconut shell ash (CSA) reinforced polyester composite have been optimized. Various test specimens were developed by dispersing 10, 20, 30 and 40 wt.%, of CSA in unsaturated polyester resin in decreasing particle sizes of 40, ...

    Abstract The mechanical properties of coconut shell ash (CSA) reinforced polyester composite have been optimized. Various test specimens were developed by dispersing 10, 20, 30 and 40 wt.%, of CSA in unsaturated polyester resin in decreasing particle sizes of 40, 30, and 20 µm in an open mould using hand lay-up technique. Tensile, flexural, and impact strengths, as well as tensile and flexural moduli and Shore D hardness of all test samples were determined. The results showed that 10-20 wt.% CSA increased tensile, flexural, impact strengths and flexural modulus for all particle sizes, but 30-40 wt. % CSA engendered depreciation in corresponding performance. For all particle sizes, 10-40 wt. percent CSA resulted in an increase in tensile strength, whereas 10-40 wt. percent resulted into a linear increase in Shore D hardness. Further observation portrayed that in each case, the finest CSA (20 µm) have the optimum result. Statistical analysis carried out on experimental outcomes confirmed the experimental variables (particle proportion and sizes) to be significant. From the surface plot, the strength responses revealed more dependence on the individual variables than their interactions. Regression models developed for individual responses are termed statistically fit in representing the experimental data.
    Language English
    Publishing date 2023-01-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-26632-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Microsatellite Variability of Two Populations of Clarias gariepinus (Siluriformes, Clariidae) in Nigeria

    Awodiran M. O. / Adeniran F. O. / Akinwale R. O. / Akinwande A. A.

    Vestnik Zoologii, Vol 53, Iss 3, Pp 195-

    2019  Volume 208

    Abstract: The study evaluated the genetic signatures of the fishes from the two populations and compared the pattern of differentiation of the two populations with a view to separating the species from the different populations into possible sub-species. Forty (40) ...

    Abstract The study evaluated the genetic signatures of the fishes from the two populations and compared the pattern of differentiation of the two populations with a view to separating the species from the different populations into possible sub-species. Forty (40) specimens were collected from River Niger (Lokoja) and Asejire Resevoir. The DNA of the twenty (20) specimens from each population extracted from the muscle tissue using phenol-chloroform extraction (PCE) method was subjected to microsatellite DNA analysis. Seven (7) microsatellite markers (Cga01, Cga02, Cga03, Cga05, Cga06, Cga09 and Cga10) were used in the analysis. Microsatellite DNA analysis of the two populations revealed significant differentiation between the two populations as shown by the high values of heterozygosity, low level of inbreeding and non-conformance to Hardy-Weinberg’s equilibrium. It is concluded from the study that microsatellite analysis showed a high potentiality for separation of the populations.
    Keywords differentiation ; diversity ; heterozygosity ; microsatellite dna analysis ; populations ; Zoology ; QL1-991
    Subject code 590
    Language English
    Publishing date 2019-06-01T00:00:00Z
    Publisher Sciendo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  3. Article: Influence of chemical treatment on the properties of cement-paper hybrid composites for ceiling board application.

    Adediran, A A / Balogun, O A / Akinwande, A A / Adesina, O S / Olasoju, O S

    Heliyon

    2020  Volume 6, Issue 7, Page(s) e04512

    Abstract: This study evaluates the effect of treated and untreated jute fiber/eggshell particulate reinforced cement-paper matrix composites for ceiling board application. Treated jute fiber (TJF) was obtained by immersing untreated jute fiber (UJF) into 1.25 M ... ...

    Abstract This study evaluates the effect of treated and untreated jute fiber/eggshell particulate reinforced cement-paper matrix composites for ceiling board application. Treated jute fiber (TJF) was obtained by immersing untreated jute fiber (UJF) into 1.25 M sodium hydroxide (NaOH) solution in a shaker water bath maintained at 40 °C for 4 h. Eggshells (ESP) were pulverized and sieved to -75μm. Samples were prepared by varying the fiber volume fraction from 0.5 to 2.5 wt.% in the composites. While other constituents such as the binder (cement) and eggshell were kept constant. An hydraulic press cold compaction molder was utilized in the production of the hybrid composites in a predetermined mix ratio designed based on previous research. The samples produced were cured for 7 and 14 days, then sundried for 36 h. The physical, thermal, mechanical and wear behaviour of the produced composites were evaluated while the surface morphology of the fractured splitting tensile samples were analyzed. The result reveals that TJF/ESP hybrid composites had better performance than UJF/ESP hybrid composites in most of the tests carried out. Increase in the number of curing days was found to also enhance the properties of the composite produced in majority of the test evaluated. The 0.5 wt.% UJF/ESP gave the least performance of all the composites developed. While 2.5 wt. % TJF/ESP showed an optimum properties among the composites tested. When compared with standard, it is concluded that the hybrid composites developed can be suitable for ceiling boards and also find possible application in wall partitioning.
    Language English
    Publishing date 2020-07-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2020.e04512
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Influence of chemical treatment on the properties of cement-paper hybrid composites for ceiling board application

    Adediran, A.A / Balogun, O.A / Akinwande, A.A / Adesina, O.S / Olasoju, O.S

    Heliyon. 2020 July, v. 6, no. 7

    2020  

    Abstract: This study evaluates the effect of treated and untreated jute fiber/eggshell particulate reinforced cement-paper matrix composites for ceiling board application. Treated jute fiber (TJF) was obtained by immersing untreated jute fiber (UJF) into 1.25 M ... ...

    Abstract This study evaluates the effect of treated and untreated jute fiber/eggshell particulate reinforced cement-paper matrix composites for ceiling board application. Treated jute fiber (TJF) was obtained by immersing untreated jute fiber (UJF) into 1.25 M sodium hydroxide (NaOH) solution in a shaker water bath maintained at 40 °C for 4 h. Eggshells (ESP) were pulverized and sieved to -75μm. Samples were prepared by varying the fiber volume fraction from 0.5 to 2.5 wt.% in the composites. While other constituents such as the binder (cement) and eggshell were kept constant. An hydraulic press cold compaction molder was utilized in the production of the hybrid composites in a predetermined mix ratio designed based on previous research. The samples produced were cured for 7 and 14 days, then sundried for 36 h. The physical, thermal, mechanical and wear behaviour of the produced composites were evaluated while the surface morphology of the fractured splitting tensile samples were analyzed. The result reveals that TJF/ESP hybrid composites had better performance than UJF/ESP hybrid composites in most of the tests carried out. Increase in the number of curing days was found to also enhance the properties of the composite produced in majority of the test evaluated. The 0.5 wt.% UJF/ESP gave the least performance of all the composites developed. While 2.5 wt. % TJF/ESP showed an optimum properties among the composites tested. When compared with standard, it is concluded that the hybrid composites developed can be suitable for ceiling boards and also find possible application in wall partitioning.
    Keywords cement ; chemical treatment ; cold ; egg shell ; jute ; sodium hydroxide ; solar drying
    Language English
    Dates of publication 2020-07
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2020.e04512
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: Comparative Growth and Survival of Reciprocal Hybrids Between Clarias gariepinus and Clarias anguillaris

    Akinwande, A. A. / Fagbenro, O. A. / Adebayo, O. T.

    Journal of applied aquaculture

    2012  Volume 24, Issue 4, Page(s) 349

    Language English
    Document type Article
    ZDB-ID 1089577-2
    ISSN 1045-4438
    Database Current Contents Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Z 5584: Show issues

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  6. Article: Comparative Growth and Survival of Reciprocal Hybrids Between Clarias gariepinus and Clarias anguillaris

    Akinwande, A. A / Fagbenro, O. A / Adebayo, O. T

    Journal of applied aquaculture. 2012 Dec. 1, v. 24, no. 4

    2012  

    Abstract: Reciprocal, interspecific hybrids of Clarias gariepinus and Clarias anguillaris were produced via hypophysation and dry stripping. Two-week-old fry (0.06 ± 0.02 g) of the parental Clarias species and their interspecific hybrids were stocked in duplicated ...

    Abstract Reciprocal, interspecific hybrids of Clarias gariepinus and Clarias anguillaris were produced via hypophysation and dry stripping. Two-week-old fry (0.06 ± 0.02 g) of the parental Clarias species and their interspecific hybrids were stocked in duplicated 1 m³ hapas suspended in outdoor earthen ponds (16 m²) for a rearing period of 56 days. Growth and survival of the hybrids was intermediate to the faster growing and better surviving C. gariepinus and the more slowly growing and more vulnerable C. anguillaris parental lines. The weight gain attained by C. gariepinus, C. anguillaris, C. gariepinus (♂) × C. anguillaris (♀), and C. anguillaris (♂) × C. gariepinus (♀) were 3.18 g, 2.99 g, 3.16 g and 3.05 g, respectively. Among hybrids, the growth of C. gariepinus (♂) × C. gariepinus (♀) was higher than the reciprocal C. anguillaris (♂) × C. gariepinus (♀). Heterosis for growth was a negligible 0.65% and for survival was negative (−5%). C. gariepinus appears to be the best species for aquaculture in terms of growth rate and survival.
    Keywords Clarias gariepinus ; aquaculture ; heterosis ; hybrids ; ponds ; rearing ; survival rate ; weight gain
    Language English
    Dates of publication 2012-1201
    Size p. 349-355.
    Publishing place Taylor & Francis Group
    Document type Article
    ZDB-ID 1089577-2
    ISSN 1545-0805 ; 1045-4438
    ISSN (online) 1545-0805
    ISSN 1045-4438
    DOI 10.1080/10454438.2012.734694
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 5584: Show issues

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  7. Article: Piscicidal potential of mesocarp of neem plant (Azadirachta indica L.) fruit on hybrid, "Heteroclarias".

    Akinwande, A A / Sogbesan, A O / Moody, F O / Ugwumba, A A A

    Journal of environmental biology

    2007  Volume 28, Issue 3, Page(s) 533–536

    Abstract: The piscicidal potential of water-extract mesocarp of Azadirachta indica (L) was studied in static bioassay experiment with continuous aeration to determine its acute toxicity The mortality rate and opercular ventilation under laboratory conditions over ... ...

    Abstract The piscicidal potential of water-extract mesocarp of Azadirachta indica (L) was studied in static bioassay experiment with continuous aeration to determine its acute toxicity The mortality rate and opercular ventilation under laboratory conditions over 96 hr exposure were monitored. The 96 hrLC50 was 81.28 mgl(-1) while the threshold value was 21.13 mgl(-1). The fish exhibited respiratory distress (such as gasping air), loss of appetite, loss of balance and erratic swimming prior to mortality.
    MeSH term(s) Animals ; Azadirachta/chemistry ; Azadirachta/toxicity ; Catfishes/physiology ; Fruit/chemistry ; Fruit/toxicity ; Lethal Dose 50 ; Plant Extracts/toxicity
    Chemical Substances Plant Extracts
    Language English
    Publishing date 2007-07
    Publishing country India
    Document type Journal Article
    ISSN 0254-8704
    ISSN 0254-8704
    Database MEDical Literature Analysis and Retrieval System OnLINE

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