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Double-strand brakes of T4-DNA molecules caused by ultrasound irradiation are monitored through the methodology of single giant DNA observation by fluorescence microscopy. The experimental results indicate the existence of the threshold power of ultrasound on the double-strand brakes. In addition, we have examined the effect of an anti-oxidative agent, 2-mercaptoethanol (2-Me), on the ultrasound damage...
In this paper, we discuss a novel, magnetically driven microrobot equipped with a frame structure to measure the stimulant property of aquatic microorganisms. The fabricated microfluidic chip and microrobots are shown. The untethered microrobot is composed of a Si-Ni hybrid structure constructed by MEMS techniques. The microrobots with 5 μm width force sensors are actuated in a microfluidic chip by...
This paper presents a novel PDMS (polydimethylsiloxane) device to analyze behaviors of plant-parasitic nematode, Meloidogyne incognita. For allowing the nematodes to swim in micro analyzed area, we developed a protocol of loading an agarose gel into microchannels by power-free pumping method. We experimentally confirmed that microchannel array 5 μm wide, which is narrower than the body width of the...
Many types of functional gels have been developed and applied to soft actuators or artificial muscles. In particular, electroactive polymer gels that change shape when controlled electrically seem to be promising. But the mechanical motion is driven by electric stimuli. In the present study, we describe the autonomous hydrogel locomotion powered by the chemical energy. The polymer gels can generate...
Motor protein kinesin has been utilized as nano-and microscale material transport system (so-called molecular shuttles driven by kinesin motors). Successful transports rely on guidance of molecular shuttles movements with microfabricated guiding tracks. Predictions of guiding probability at the boundaries are important in designing microfabricated tracks. In this study, we computed the guiding probabilities...
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