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Item Biotechnology of waste water treatment with special reference to removal of toxic metals from industrial waste waters(Natural Resources Energy Science Authority:Colombo, 1994) Widanapathirana, S.Item Ratoon stunting disease of sugarcane in Sri Lanka(National Science Council:Colombo, 1987) Jayaratne, D.L.; Widanapathirana, S.Item Antibiotic susceptibility of food Isolates of Listeria monocytogenes(1995) Ganepola, K.G.; Kodikara, C.P.; Widanapathirana, S.Item Identification of soil microorganisms (Bacteria and fungi) in different coconut growing soils in Sri Lanka(CRI. Lunuwila, 2000-2002) Fernando, K.S.K.S.; Tennakoon, N.A.; Widanapathirana, S.Item A preliminary study of total viable count of micro organisms, in ayurvedic compound preparation of seetharama vati,with a view to defining an acceptable microbial quality standards and good manufacturing practice(2007) Nageeb, B.M.; Amarasinghe, A.P.G.; Widanapathirana, S.Item A study of total viable count and specific micro organisms,in arurvedic compound preparation of Thripala Choorana, with a view to defining an acceptable microbial quality standard(2008) Nageeb, B.M.; Amarasinghe, A.P.G.; Widanapathirana, S.Item A comparative preliminary study of anti-bacterial effect of an ayurved preparation of sarva visadee oil(2007) Nageeb, B.M.; Amarasinghe, A.P.G.; Widanapathirana, S.Item A preliminary study of anti-bacterial effect of selected five ayurvedic compound preparations(2006) Nageeb, B.M.; Amarasinghe, A.P.G.; Widanapathirana, S.