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Now showing items 11-20 of 1887
Conducting randomized trials in general practice : methodological and practical issues
(1999-11)
The evaluation of the outcome of health services technologies is a requirement for their efficient provision in clinical practice. The most reliable evidence for treatment efficacy comes from randomized trials. Randomized ...
Differential modulation of motor neurons that innervate the same muscle but use different excitatory transmitters in Aplysia
(1999-10)
The medial portion of intrinsic buccal muscle 3 (I3m) is innervated by two excitatory motor neurons, B3 and B9. B3 uses glutamate as its fast transmitter and expresses the neuropeptide FMRFamide, whereas B9 uses acetylcholine ...
Effects of severity and timing of stem canker (Leptosphaeria maculans) symptoms on yield of winter oilseed rape (Brassica napus) in the UK
(1999-10)
The relationships between yield loss and incidence (% plants with stems affected) or severity (mean stem score, 0-4 scale) of stem canker in winter oilseed rape were analysed using data from experiments at Rothamsted in ...
Epidemiology of Leptosphaeria maculans in relation to forecasting stem canker severity on winter oilseed rape in the UK
(1999-10)
In the UK, ascospores of Leptosphaeria maculans first infect leaves of oilseed rape in the autumn to cause phoma leaf spots, from which the fungus can grow to cause stem cankers in the spring. Yield losses due to early ...
A self-aligning four-point bend testing rig and sample geometry effect in four-point bend fatigue
(1999-10)
A self-aligning four-point bend testing rig was designed and made which can minimise the possible misalignment associated with a four-point bend test and be used to study the fatigue of materials both at room and elevated ...
Emergence and partial characterization of rice stripe necrosis virus and its fungus vector in South America
(1999-10)
A new disease of rice, known as 'entorchamiento' (crinkling), was first noticed in the Department of Meta, Colombia, in 1991. Symptoms include seedling death, foliar striping and severe plant malformation. Tissue extracts ...
The influence of increased feeding on the susceptibility of sheep to infection with Haemonchus contortus
(1999-10)
Previous research has shown that supplementing the diet of growing lambs with urea enhances their ability to withstand gastrointestinal infection with the nematode Haemonchus contortus. This study compared lambs given two ...
Vpu transmembrane peptide structure obtained by site-specific Fourier transform infrared dichroism and global molecular dynamics searching
(1999-09)
The recently developed method of site-directed Fourier transform infrared dichroism for obtaining orientational constraints of oriented polymers is applied here to the transmembrane domain of the vpu protein from the human ...
Infection of linseed by Alternaria linicola : Effects of inoculum density, temperature, leaf wetness and light regime
(1999-09)
Controlled environment studies were conducted to determine the effects of inoculum density, temperature, leaf wetness and light regime on the infection of linseed by Alternaria linicola. The % cotyledons and leaves with ...