An Appraisal of Ozone Layer Depletion and Its Implication on the Human Environment

Ozone layer depletion is a reality which poses threat to human survival if not curtail. However, it has received international attention and cooperation in which nation states have come up with series of conventions and protocols. It is no more gainsaying that the protection of the environment is a duty of all as no one can be left behind.This paper examines the ozone depletion substance, the impacts and implications of ozone layer depletion on human health and environment, and possible suggestion out of the challenges. The methodology adopted is basically doctrinal with primary sources from various international instruments relating to ozone layer depletions. The secondary sources are mainly from articles in journals, commentaries and online publications.It is our humble conclusion that ozone layer protection is a global and continuous assignment in which all hands must be on deck in order to meet the desirable target. The international communities’ cooperation in this regard is commendable. DOI: 10.7176/JLPG/83-02 Publication date:March 31st 201

Comparative Study on the Epidermal Features of Twelve Under-Utilized Legume Accessions

Seeds of six species of twelve accessions of miscellaneous legumes were obtained from the germplasm unit of the International Institute of Tropical Agriculture (IITA), Ibadan, Oyo State, Nigeria. The seeds were planted into plots of 5m long, spaced 1 meter apart at the botanical garden of the University of Agriculture, Abeokuta (UNAAB), Ogun State, Nigeria. Leaves of the plants were assessed for their genetic and phylogenetic relatedness through diagnostic epidermal studying of the cell shapes, anticlinal wall types and stomatal characteristics at the abaxial and adaxial surfaces. The cell shapes, anticlinal wall types and the stomatal characteristics revealed some correlations among the studied taxa. All the species were amphiostomatic possessing stomata on both the abaxial and adaxial surfaces. Proportions of the stomata distributions among the taxa were 75% (paracytic), 16.67% (anomocytic) and 8.3% (anisocytic) at both surfaces. There was no accession with diacytic stoma. Cell shapes were 75% polygonal, 25% irregular at the abaxial surfaces and 66.67%, 33.33% irregular and polygonal respectively at the adaxial surface. The prevalent anticlinal wall type was curved (41.67%) followed by curved/slightly straight (33.3%) and slightly straight (25%) at both surfaces. Result of the epidermal features of the studied taxa revealed some diagnostic characteristics that could be used for taxonomic decisio

Tomato stem trichomes and dispersal success ofPhytoseiulus persimilis relative to its preyTetranychus urticae

Tomato varieties used at present for commercial production in Dutch glasshouses have a high density of glandular trichomes on the stem, but a very low density on the leaves. The two-spotted spider mite, Tetranychus urticae Koch, and the predatory mite, Phytoseiulus persimilis Athias-Henriot, usually disperse from leaf to leaf via the stem, thereby incurring high risks of entrapment (and death) in the exudate of the glandular trichomes. These risks have been quantified on the tomato cv. 'Turbo' and an accession of Lycopersicon peruvianum almost free of glandular trichomes. The possible consequences for biological control are discussed and new perspectives for predator release strategies and for plant breeding are considered. © 1987 Elsevier Science Publishers B.V

Antibacterial Activities of Daldina concentrica

Activities of the distilled water, ethanolic and chloroform extracts of Daldina concentrica an ascomycetous fungus was investigated on Escherichia coli , Proteus mirabilis , Pseudomonas aeruginosa , Bacillus cereus and Staphylococcus aureus ) using agar well diffusion method. Ethanolic extract of Daldina concentrica showed significantly antibacterial activity against all the test microorganisms except Bacilllus cereus (P ≤0.05). Staphylococcus aureus was the most sensitive organism to the extracts of this fungus with 17.0mm zone of inhibition with ethanol extract. It was also shown that chloroform extract of Daldinia concentrica possessed higher anti-bacterial activity against the five tested microorganisms. The effect of fresh tissues of the fungus on test bacteria indicated that Proteus mirabilis was the only sensitive organism with 5.0mm zone of inhibition while other bacteria were resistant. The implications of these findings were discussed

In vitro gas production parameters of Ficus vogelli diets in the dry and wet seasons of Nigeria

The nutritive value of Ficus vogelli (FV) in mixtures with Panicum maximum (PM) at four different treatment levels were assessed through the determination of the proximate composition and in vitro fermentation of diets in two seasons (dry and wet). Nutrient composition and qualitative analysis of secondary metabolites (saponin and tannins) of FV were determined. In vitro gas production (IVGP, ml/200 mg DM), Organic matter digestibility (OMD %), Metabolizable energy (ME, MJkg-1 DM), Short chain fatty acids (SCFA, ml), and Methane production (ml/200 mg DM) were also estimated. Crude Protein (CP), Crude Fibre (CF), Ether Extract (EE), Ash, and Neutral Detergent Fibre (NDF) for FV in the dry and wet seasons were: 16.66 and 12.11, 30.25 and 35.00, 18.90 and 20.50, 11.00 and 12.95, 74.50 and 63.50 g/100g DM respectively. FV contained saponin and tannins in both dry and wet seasons. ME, OMD and SCFA for diets of FV were not significantly (P>0.05) affected by levels of inclusion of Ficus in the wet season. However, in the dry season, OMD (69.83) was highest (

Short communication: Effect of physiological status on haematological parameters of West African Dwarf Goats

No Abstract