نتایج جستجو برای: 300 micrometers

تعداد نتایج: 88762  

2017
Qian Zhao

1 In multiple testing, weighted procedures are used for various reasons; for instance, (1) to increase power, (2) to incorporate previous knowledge about individual hypotheses, (3) to represent difference in importance (some hypotheses may be more important than others) or (4) to incorporate other measures of loss. The purpose of this question is to examine weighted procedures. Here, we assume ...

Journal: :Science 1997
D A Edwards J Hanes G Caponetti J Hrkach A Ben-Jebria M L Eskew J Mintzes D Deaver N Lotan R Langer

A new type of inhalation aerosol, characterized by particles of small mass density and large size, permitted the highly efficient delivery of inhaled therapeutics into the systemic circulation. Particles with mass densities less than 0.4 gram per cubic centimeter and mean diameters exceeding 5 micrometers were inspired deep into the lungs and escaped the lungs' natural clearance mechanisms unti...

Journal: :Applied physics. B, Lasers and optics 1999
D G Lancaster D Richter F K Tittel

Tunable narrowband mid-infrared radiation from 3.25 to 4.4 micrometers is generated by a compact fiber-coupled, difference-frequency-based spectroscopic source. A 20-mW external cavity diode laser (with a tuning range from 814 to 870 nm) and a 50-mW distributed-Bragg-reflector diode-laser-seeded ytterbium-doped fiber amplifier operating at 1083 nm are difference-frequency mixed in a multi-grati...

Journal: :Science 2009
Samuel A Meek Horst Conrad Gerard Meijer

Magnetic trapping of atoms on chips has recently become straightforward, but analogous trapping of molecules has proved to be challenging. We demonstrated trapping of carbon monoxide molecules above a chip using direct loading from a supersonic beam. Upon arrival above the chip, the molecules are confined in tubular electric field traps approximately 20 micrometers in diameter, centered 25 micr...

2010
A. Lyckegaard A. Alpers W. Ludwig R. W. Fonda L. Margulies A. Götz H. O. Sørensen S. R. Dey H. F. Poulsen E. M. Lauridsen

A method for reconstructing the 3D shape of a single grain in a polycrystal from far-field diffraction data is presented. The reconstruction is performed using an iterative algorithm, algebraic reconstruction technique (ART), to solve a linear system of equations obtained from data from the Boxscan technique. The Boxscan technique is a 3D X-ray diffractiontype scanning technique, which – in geo...

Journal: :Chemical Society reviews 2007
Thomas Laurell Filip Petersson Andreas Nilsson

Acoustic standing wave technology combined with microtechnology opens up new areas for the development of advanced particle and cell separating microfluidic systems. This tutorial review outlines the fundamental work performed on continuous flow acoustic standing wave separation of particles in macro scale systems. The transition to the microchip format is further surveyed, where both fabricati...

Journal: :Applied optics 2011
Arthur Vigan Kjetil Dohlen Silvio Mazzanti

Future extremely large telescopes will adopt segmented primary mirrors with several hundreds of segments. Cophasing of the segments together is essential to reach high wavefront quality. The phasing sensor must be able to maintain very high phasing accuracy during the observations, while being able to phase segments dephased by several micrometers. The Zernike phase contrast sensor has been dem...

Journal: :The Biochemical journal 1982
F M Dickinson G J Hart

Sheep liver cytoplasmic aldehyde dehydrogenase is strongly inhibited by Mg2+, Ca2+ and Mn2+. The inhibition is only partial, however, with 8-15% of activity remaining at high concentrations of these agents. In 50 mM-Tris/Hcl, pH 7.5, the concentrations giving half-maximal effect were: Mg2+, 6.5 micrometers; Ca2+, 15.2 micrometers; Mn2+, 1.5 micrometer. The esterase activity of the enzyme is not...

Journal: :Biophysical journal 1999
M Dembo Y L Wang

Recent technological improvements in the elastic substrate method make it possible to produce spatially resolved measurements of the tractions exerted by single motile cells. In this study we have applied these developments to produce maps of the tractions exerted by 3T3 fibroblasts during steady locomotion. The resulting images have a spatial resolution of approximately 5 micrometers and a max...

Journal: :Geophysical research letters 1999
D M Kass Y L Yung

Using a new measurement of the D/H fractionation efficiency and new estimates of the water loss, we calculate that Mars has the equivalent of a approximately 9 m global water layer in a reservoir that exchanges with the atmosphere. The measured D/H enrichment is about 5 times the terrestrial value, but without exchange, the atmosphere converges on an enrichment of 50 in about 0.5 Ma. Due to the...

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