Now showing items 11-20 of 60
Observations on the pathogenicity of pasteuria-penetrans, a parasite of root-knot nematodes
A simple test was used to determine whether or not Pasteuria penetrans spores would attach to 17 species of nematodes. All susceptible individuals had spores attached to their cuticles after 24 h of gentle agitation in ...
Characterisation of multimeric DNA forms associated with tomato golden mosaic virus infection
Homodimeric and trimeric double-stranded DNA forms of both components of the genome of the geminivirus, tomato golden mosaic virus have been isolated from infected Nicotiana tabacum plants and characterised.
Dark matter in the dwarf galaxy II Zwicky 40
H I observations of the blue compact dwarf galaxy II Zwicky 40 at high angular resolution reveal the presence of two kinematical systems. The H I structure and kinematics can be understood in terms of two interacting H I ...
Dispersal of Rhynchosporium secalis conidia from infected barley leaves or straw by simulated rain
Simulated rain (mean drop diameter c. 1 or 3 mm) was allowed to fall for 10 – 15 min on to barley leaves or straw infected by Rhynchosporium secalis (leaf blotch). The leaves were supported on a mesh through which run-off ...
Nonlinear effects on pulsed laser propagation in the atmosphere
Nonlinear effects on the propagation of a high power pulsed laser beam through the earth’s atmosphere are modeled. Stimulated Raman scattering in relatively modest power laser beams is estimated to be very significant when ...
Stages in the progress of eyespot epidemics in winter wheat crops
The temporal progress of eyespot (Pseudocercosporella herpotrichoides) epidemics in winter wheat crops is considered in four stages: leaf sheath lesion establishment, leaf sheath penetration, stem lesion establishment and ...
Random walk models of binary choice : the effect of deadlines in the presence of assymetric payoffs
Random walk models of binary choice were evaluated using line length discrimination tasks of varying difficulty. Subjects' gained monetary payoffs when their responses were correct and lost when their responses were ...
Palmitoyl carnitine : an endogenous promoter of calcium efflux from rat heart mitochondria
The effects of the fatty acid ester palmitoyl carnitine (PC) on mitochondrial Ca2+ handling and ATP synthesis are described. At low concentrations (5–40 μM) PC was found to produce changes in mitochondrial Ca2+ handling, ...