Now showing items 1-10 of 72
Pedonin, a spiro tetranortriterpenoid insect antifeedant from Harrisonia abyssinica
A novel ring-D cleaved spiro tetranortriterpenoid insect antifeedant, pedonin, has been isolated from the roots of Harrisonia abyssinica. Pedonin was studied spectroscopically and its structure determined by X-ray analysis.
Major Influences on Science Achievement in a Developing Country: Kenya
(International Journal of Science Education, 1989)
This study seeks to contribute to our understanding of the relative importance of selected student, teacher and school characteristics on student achievement and attitudes towards science. The sample included 424 Form 4 ...
The behaviour of nitrogen fertilizers in neutral and acid loess soils II. Distribution and balances of 15 N‐tagged nitrogen
(Wiley-VCH Verlag, 1983)
A study, to investigate the remaining fertilizer-N in undisturbed soil columns from agricultural and forest soils after 60 days of percolation (see part I), was carried out. The columns were fertilized with two 15-N tagged ...
Leaching of plant nutrients from an acid forest soil after nitrogen fertilizer application
(Springer Verlag, 1986)
In a laboratory experiment, the effect of nitrogen fertilizers on the leaching patterns and input-output budgets of plant nutrients in an acid soil (dystric cambisols) was studied. An amount of N corresponding to 80 kg/ha ...
Effects of paracetamol and acetylsalicylic acid on the post-operative course after experimental orthopaedic surgery in dogs
In placebo-controlled cross-over trials in dogs, two ‘identical’ operations were performed on the forelimbs of each animal with an interval of 28 days, to evaluate how daily doses of 1.5 g paracetamol, 1.5 g acetylsalicylic ...
The behavior of nitrogen fertilizers in neutral and acid loess soils 1. transport and transformations of nitrogen
(Wiley-VCH Verlag, 1983)
A study to investigate the transport and the transformation of two N15-tagged N-fertilizers (Ca(NO3)2 and (NH4)2SO4) was carried out in the laboratory at 4° and 23°C. Undisturbed soil columns from the upper 30 cm of neutral ...
Phytochemical Screening of Tanzanian Medicinal Plants. I.
To evaluate traditional medicine, which is an important part of the health-care system in Tanzania, three different regions, Coast, Morogoro and Kilimanjaro were surveyed for the herbs used by traditional healers. For each ...
Simulation of nitrate movement in undisturbed soil columns
(Elsevier Masson, 1984)
In order to simulate the behaviour of nitrate movement in soils, two loessal soils were used which differed in their physical and chemical fertility. Undisturbed soil columns of 30 cm in length and 15 cm diameter were ...
Traditional Healers and Health Care Delivery in Tanzania.
(Tropical Doctor, 1982-07)
Intraocular Pressure During Haemodialysis.
(Indian Journal of Ophthalmology, 1988)