Orlando David

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A clone of the grain aphid Sitobion avenae F. was maintained parthenogenetically over thirty-two generations (n = 344) in a constant environment: a new generation being set up by a female selected at random from the preceding generation. Genomic DNA from individual aphids was screened for genetic stability using RAPD-PCR with a previously tested ten-mer(More)
Functional electrical stimulation is an important tool towards rehabilitation of lost motor functions on individuals who have had spinal cord injury or stroke. Peripheral nerves are preferential targets for electrical stimulation because of easy surgical access, where electrodes serve as interfaces between neuroprostheses and the peripheral nerve. The(More)
In general, a plant extract contains low concentrations of active compounds and a large number of promising but undiscovered compounds [1]. A widely observed and accepted fact about the medicinal value of plants is mainly the bioactivity of the phytocomponents present in it. Although a major effort towards of the elucidation of bioactive phytochemicals is(More)
The grain aphid Sitobion avenae (F.) was collected from winter wheat and adjacent cocksfoot grass at two locations in southern England and at four times in the year (April-July). Genetic variation between individual aphids was then investigated using random amplified polymorphic DNA polymerase chain reaction. Individuals caught in wheat and cocksfoot during(More)
Electrical impedance tomography (EIT) consists in probing biological tissues with low amplitude alternating electrical fields through surface electrodes, and analyzing the response of the medium to reconstruct its electrical characteristics. EIT has been considered for a wide range of clinical applications, the most promising being continuous pulmonary(More)
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