Recent studies have revealed that the use of probiotics is an alternative to control marine aeromonas. However, few probiotics are available against Aeromonas hydrophila infections in eels. In the present study, a potential antagonistic strain G1 against the eel-pathogenic A. hydrophila was isolated from sediment underlying brackish water. Its extracellular products with antibacterial activities were shown to be stable under wide range of pH, temperature, and proteinase K. It was initially identified as Bacillus amyloliquefaciens using API identification kits and confirmed to be B. amyloliquefaciens strain (GenBank accession number DQ422953) by phylogenetic analysis. In addition, it was shown to be safe for mammalians, had a wide anti-A. hydrophila spectrum, and exhibited significant effects on inhibiting the growth of the eel-pathogenic A. hydrophila both in vitro and in vivo. To the best of our knowledge, this is the first report on a promising antagonistic Bacillus amyloliquefaciens strain from brackish water sediment against eel-pathogenic A. hydrophila.
This paper presents the current work progress of HIT/DLR Dexterous Hand. Eased on the technology of DLR Hand 11, HIT and DLR are jointly developing a smaller and easier manufactured robot hand. The prototype of one finger has been successfully built. Thefinger has three DOF andfourjoints, the last two joints are mechanically coupled by a rigid linkage.
All the actuators are commercial brushless DC motors with integrated analog Hall sensors. DSP based control system is implemented in PCI busarchitecture and the serial communication between the hand and DSP needs only 6 lines(4 lines power supply and 2 lines communication interface). The fingertip force can reach ION.
Abstroct -The paper presents hardware and software architectures of the EITIDLR Band. The band bas four identical fingers and an extra degree of freedom (d.0.9 for palm. In each flnger, there is a re-configurnble Field Programmable Gate Array (FPGA) for data acquisition, BmshIeu DC (BL.DC) motors control and commnniention with palm's FPGA by Point-to-Point Serial Communication (PPSeCo). The kernel of the hardware system is a PCI-based high speed Ooating-point Digital Signal Processor (DSP) for data processing, and FPGA for high speed (up to 2SMbps) real-time serial communication with the palm's FPGA. In order to achieve high modularity and reliability of the hand, a fully mechatronic integration and analog signals in-situ digitalization philosophy are implemeoted to minimize the dimension, number of the cables (5 cables including power supply) and protect data communication from outside disturbances. Furthermore, according to the hardware architecture of the band, a hierarchical software architectnre bas been estabbhed to perform all data processing and control of the band. The software structure provides basic Application Programming Interface (AFT) functions and s m to access all hardware resources for data acquisition, Computation and teleoperation.
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