Podocarp distribution in Africa follows a discontinuous mountainous belt from Cameroon to Angola in the west and from Ethiopia in the northeast to the southern Cape in South Africa. Besides a relict population of Afrocarpus falcatus in coastal lowland forest in northeastern South Africa and southern Mozambique, African podocarps are generally limited to highland (Afrotemperate) regions. All pod...

Studies on the influence of light on respiration have yielded different results with different organisms. In some instances results were interpreted as evidence for light stimulation of respiration (3, 4, 5, 6), in other cases for photoinhibition (8, 13), and in still other examples for a negligible effect (1). With a given species simultaneous measurements of respiratory and photosynthetic 02 ...

Kessler (1) has studied the reduction of nitrite to ammonia by the green alga Ankistrodesmus both in the light in an atmosphere of nitrogen and in the dark under hydrogen. No specific conclusion could be drawn as to the mechanism of the process, although it was assumed that reduced pyridine nucleotides might serve as the immediate hydrogen donors for the reduction of nitrite and that energy-ric...

population of Escherichia coli undergoing induced ,8-galactosidase synthesis. J. Bact. 78: 613-623. 4. COHN, M. & K. HORIBATA. 1959. Physiology of the inhibition by glucose of the induced synthesis of the 8-galactoside-enzyme system of Escherichia coli. J. Bact. 78: 624-635. 5. GALE, E. F. & R. DAVIES, eds. 1953. Adaptation in micro-organisms, 3rd Symposium of the Society for General Microbiolo...

Problem statement: Al-Khadoud spring is one of the most important water resources in AlHassa Governorate, Saudi Arabia. However, much of its biotic information is still unknown. This study presented preliminary ecological information of this aquatic body. The aim of this research was to study the water characteristics and the planktonic organisms inhibiting Al-Khadoud spring and its irrigationa...

BACKGROUND Medicinal plants (MPs) used by traditional healers (THs) were investigated in Megera and adjacent subdistricts (kebeles) of Dalle District, Sidama Zone, southern Ethiopia. The objective of the study was to identify and record MPs and their traditional uses in the treatment of various human ailments with emphasis on malignancies and other most frequently reported diseases. METHODS T...