نتایج جستجو برای: micro silica

تعداد نتایج: 151315  

Journal: :Analytical chemistry 2006
Qirong Wu Joan M Bienvenue Benjamin J Hassan Yien C Kwok Braden C Giordano Pamela M Norris James P Landers Jerome P Ferrance

Effective microchip extraction of deoxyribonucleic acid (DNA) from crude biological matrixes has been demonstrated using silica beads or hybrid phases composed of beads and sol-gel. However, the use of monolithic sol-gels alone for extraction of human genomic DNA has been more difficult to define. Here we describe, for the first time, the successful use of monolithic tetramethyl orthosilicate-b...

Journal: :Analytical biochemistry 2000
H Tian A F Hühmer J P Landers

For DNA purification to be functionally integrated into the microchip for high-throughput DNA analysis, a miniaturized purification process must be developed that can be easily adapted to the microchip format. In this study, we evaluate the effectiveness of a variety of silica resins for miniaturized DNA purification and gauge the potential usefulness for on-chip solid-phase extraction. A micro...

Journal: :Journal of structural biology 2007
James C Weaver Joanna Aizenberg Georg E Fantner David Kisailus Alexander Woesz Peter Allen Kirk Fields Michael J Porter Frank W Zok Paul K Hansma Peter Fratzl Daniel E Morse

Despite its inherent mechanical fragility, silica is widely used as a skeletal material in a great diversity of organisms ranging from diatoms and radiolaria to sponges and higher plants. In addition to their micro- and nanoscale structural regularity, many of these hard tissues form complex hierarchically ordered composites. One such example is found in the siliceous skeletal system of the Wes...

Journal: :IEEE robotics and automation letters 2021

Origami structures have a wide range of applications in robotics and been intensively investigated by researchers recent years. However, enabling sub-millimeter is an open question especially because the lack small enough joints. In this paper, compliant joints made Silica Focused Ion Beam (FIB) folding are proposed to achieve continuous, highly repeatable large motions. A polyarticulated struc...

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