نتایج جستجو برای: biological particle

تعداد نتایج: 631409  

2005
Jie Wu

Microfludic devices with integrated electrical detection will enable fast, low-cost or portable sensing and processing of biological and chemical samples. As an inherent property of microfabrication, microelectrical impedance spectroscopy detectors can take advantage of AC electrokinetics for particle manipulation, leading to enhanced sensitivity. Preliminary experiments on particle detection w...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2011
Pulak K Ghosh Russell Glavey Fabio Marchesoni Sergey E Savel'ev Franco Nori

Geometric stochastic resonance of particles diffusing across a porous membrane subject to oscillating forces is characterized as a synchronization process. Noninteracting particle currents through a symmetric membrane pore are driven either perpendicular or parallel to the membrane, whereas, harmonic-mixing spectral current components are generated by the combined action of perpendicular and pa...

2013
J. C. Tarafdar Shikha Sharma Ramesh Raliya

Nanotechnology is the study of particle sizes between 1 and 100 nanometers at least at one dimension. Particle size reduced to nanometer length scale exhibit more surface area to volume size ratio and showing unusual properties makes them enable for systematic applications in engineering, biomedical, agricultural and allied sectors. Nanomaterial can create from bottom up or top down approaches ...

2009
J C Andrews S Brennan P Pianetta H Ishii J Gelb M Feser J Rudati A Tkachuk W Yun

A full-field hard-x-ray microscope at SSRL with 15 micron field of view and 40 nm resolution, as well as 3D tomographic capabilities, has successfully imaged samples of biological, environmental and astronomical origin. Spectroscopic imaging of a particle of comet dust from the NASA Stardust mission showed significantly more absorption contrast above the Fe K-edge, and tomography revealed the t...

2016
Huiliang Zhang David R. Glenn Richard Schalek Jeff W. Lichtman Ronald L. Walsworth

Correlated electron microscopy and cathodoluminescence (CL) imaging using functionalized nanoparticles is a promising nanoscale probe of biological structure and function. Nanodiamonds (NDs) that contain CL-emitting color centers are particularly well suited for such applications. The intensity of CL emission from NDs is determined by a combination of factors, including: particle size; density ...

2013
VADIM V. SUMBAYEV INNA M. YASINSKA BERNHARD F. GIBBS

Gold nanoparticles display unique properties which allow them to influence a number of different biochemical processes. Interestingly, these effects are dependent on the particle surface chemistry which varies considerably based on the particle size. In addition, unlike most of other nanomaterials, gold nanoparticles do not trigger the formation of pro-inflammatory multiprotein complexes, known...

2004
Carol Saunders Craig Van Slyke Douglas R. Vogel

ion Abstract—time is viewed as the medium in which events occur; no reference is made to ‘past,’ ‘present,’ or ‘future’ Concrete—Not all parts in the sequence of events can be experienced at the same time (e.g., gestation or metamorphosis unfolds over time) Subjectivity Objective—time is based upon the oscillations of subatomic particles; is independent

2008
V. I. Gerasimenko

The aim of this work is to study the properties of groups of operators for evolution equations of quantum many-particle systems, namely, the von Neumann hierarchy for correlation operators, the BBGKY hierarchy for marginal density operators and the dual BBGKY hierarchy for marginal observables. We show that the concept of cumulants (semi-invariants) of groups of operators for the von Neumann eq...

2010
Simon Yu

For them, traditional biologists and medical scientists committed a gross scientific error by overlooking quantum physics as being too weird, mind bending and unpredictable for biological systems. The basis of quantum physics is that, at the sub-atomic level, matter does not exist with certainty. It only exists as a tendency to exist in particle or wave form as maybe yes or maybe no. This appli...

2006
Moslem Bahadori

Since its original conception in 1959, by Nobel physicist Richard P Feynman, the notion of nanotechnology and its potential ramifications have not only created fascination,but also intense scientific efforts and scrutiny. One of the most promising applications of nanotechnology is in the context of medicine. Due to their unique size-dependent properties nanomaterials such as nanoparticles offer...

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