background and purpose: biochemistry is extremely difficult in preclinical medical education because of the monotonous use of lectures, tutorials, practical and end of semester load with end of semester examination. although several studies have been carried out on learning biochemistry in europe and america, asian studies are very few and literature in the sri lankan context is lacking. we aim...

some reports indicate a wide range for zn requirements for broiler chickens i.e. from 10.6 to 105 mg kg-1. a number of factors other than dietary zn concentration determine the need for supplementation, principally dietary phytate. therefore, the objective of the present investigation was reevaluation of the zinc requirement for broiler, fed practical diet supplemented with phytase in a dose-re...

Contact dermatitis is an inflammatory skin disease due to contact with different substances and caused by two mechanisms: Allergy and irritation. Contact dermatitis is a common skin disease and the most common occupational dermatosis. Differentiating between allergic and irritant contact dermatitis is essential in the identification of etiologic factor(s) and hence, its control and prognosis. T...

Data envelopment analysis (DEA) is one of the most efficient tools for efficiency measurement which can be employed as a benchmarking method with multiple inputs and outputs. However, DEA does not provide any suggestions for improving efficient units, nor does it provide any benchmark or reference point for these efficient units. Impracticability of these benchmarks under environmental conditio...

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