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ABSTRACTAIM The existence and properties of alpha-fetoprotein (AFP) receptor on the surface of NIH 3T3 cells and the effects of AFP on cellular signal transduction pathway were investigated. METHODS The effect of AFP on the proliferation of NIH 3T3 cells was measured by incorporation of 3H-TdR. Receptor-binding assay of 125I-AFP was performed to detect the(More)
This paper presents the design and hydrodynamic model of an autonomous robot for cleaning rubbish floating on the surface of a lake. We first address criteria and technical issues in designing such a lake surface cleaning robot (LSCR). A prototype robot with 4 pontoons is further developed. This paper also models hydrodynamics of the prototype robot using(More)
The main reasons of the oil pipeline accidents is wall thinning due to corrosion and cracks. This topic develops a broad-band ultrasonic pig technology to detect pipeline corrosion and cracks。The technique can automatically measure wall thickness、diameter and detect axial crack flaw entirely and it can solve the misjudgments and miss judgment during(More)
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