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The Kheda project experience has shown that bio-environmentalcontrol of malaria is feasible, cost effective and ecologicallysound. It clearly brings out the need to consider health issuesat the planning stage of all developments. Bio-environmentalcontrol of malaria is suggested as the first line of attackfor the control of mosquitoes, malaria and other mosquito-bornediseases. Insecticides may be reserved for short-term use. Thiswill enable judicious and selective use of insecticides in solelyepidemic situations. The growing problem of resistance to insecticidesin mosquitoes as well as environmental pollution, can then besolved on a long term basis. 相似文献
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Internal mammary compartment: window to the mediastinum 总被引:1,自引:0,他引:1
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Kenneth MC Cheung Jing-ping Wu Qing-he Cheng Bonnie SC Ma Ji-chang Gao Keith DK Luk 《Journal of orthopaedic surgery and research》2007,2(1):16-5
Background
Thoracoscopic anterior release has been shown that it can effectively improve spinal flexibility in animal and human cadaveric studies, and has been advocated for use in patients with scoliosis. This prospective case series aims to investigate the improvement of the spinal flexibility and the effectiveness in deformity correction by anterior thoracoscopic release and posterior spinal fusion. 相似文献68.
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The majority (217/325, 66%) of the neurons in the middle temporal (MT)
area/V5 show strong antagonistic surrounds, defined here by a decrease of
at least 50% in the summation curve. We mapped the antagonistic surround in
145 such cells, using eight circularly distributed surround stimulus
patches (Surround Asymmetry Test, SAT) and also mapped the surround in 51
of these 145 cells using a grid consisting of 25 square patches (Surround
Mapping Test, SMT). Both tests showed that the angular surround
distribution was non-uniform in the majority of these neurons. In half the
neurons, the antagonistic surround was asymmetric, and arose from a single
region on one side of the excitatory receptive field (ERF). In another
quarter of the sample the surround was bilaterally symmetric, and arose
from a pair of regions on opposite sides of the ERF. Only the remaining 20%
showed a circularly symmetric surround distribution. These three groups
differed in their laminar distribution. The SMT showed that, radially, the
surround antagonism reached a maximum, on average, at 1.5 times the ERF
radius. Detailed comparisons of the spatial relationships of excitatory and
inhibitory regions of the RF components shows that non-homogeneity of the
surround influence appears to be an intrinsic property of the surround.
Such a property may underly the extraction of the surface orientation and
curvature from speed patterns.
相似文献