A silicon nanowire field-effect transistor based sensor (SiNW-FET) has been proved to be the most sensitive and powerful device for bio-detection applications. In this paper, SiNWs were first fabricated by using our recently developed deposition and etching under angle technique (DEA), then used to build up the complete SiNW device based biosensor. The fabricated SiNW biosensor was used to detect DNA of genetically modified maize. As the DNA of the genetically modified maize has particular DNA sequences of 35S promoter, we therefore designed 21 mer DNA oligonucleotides, which are used as a receptor to capture the transferred DNA of maize. In our work, the SiNW biosensor could detect DNA of genetically modified maize with concentrations down to about 200 pM.
Study on Synthesis of 2-(Substituted benzylidene)amino-2-deoxy-1,3,4,6-tetra--O-acetyl-β-D-glucopyranones from D-Glucosamine. -The title compounds (III) are obtained in reactions of α-D-glucosamine hydrochloride with different substituted benzaldehydes under optimized reaction conditions. -(NGUYEN*, D. T.; NGUYEN, V. Q.; Lett. Org. Chem. 10 (2013) 2, 85-90, http://dx.doi.org/10.2174/1570178611310020003 ; Fac. Chem., VNU Univ. Sci., Hanoi, Vietnam; Eng.) -H. Toeppel 39-195
Abstract. Among parallel robots, spherical robots occupy an important place.
Most applications of spherical manipulators can be found in orienting
devices, such as camera orienting and medical instrument alignment. A
spherical parallel robot is, in general, made up of the base platform and the moving platform. This mobile platform and base are connected by three equally spaced legs, each consisting of revolute joints only. The axes of all joints intersect at a common point, which is called the center of rotation. The motion of the moving platform is confined on the surface of a sphere centered at the rotation center. A spherical parallel robot provides 3 degrees of freedom of pure rotations. These robots have been the subject of many papers dealing with the structure, the problems of position and
velocity, workspace modeling, singularity analysis, and some problems with
the dynamic analysis. However, not all the important problems have been
solved. These concern the problem of accuracy. This paper presents
accuracy of the spherical parallel. In the considered spherical manipulator, each leg consists of five kinematic pairs. The kinematic accuracy is determined on the kinematic problem. The dynamic accuracy is estimated on the equation of motion. Examples of solving the problem of determining the positioning error of the output level are presented.
This paper will discuss the design of cyclic redundancy check code (CRC), a most popular error detecting scheme in intelligent communication. At first, the concepts of CRC are given in detail with mathematical model and software simulation in python scripts. And mainly, with calculation time trade-off strategy, we provide the CRC hardware design with three architecture models serial, parallel, hybrid serial and parallel. Keywords: Error Detection Scheme; Cyclic Redundancy Check; Python; Verilog HDL; Digital System Design
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