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Showing 13 to 24 of 2108 entries
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Circulating tumor cells in melanoma: a review of the literature and description of a novel technique.

Proceedings (Baylor University. Medical Center)

Steen S, Nemunaitis J, Fisher T, Kuhn J.
PMID: 18382750
Proc (Bayl Univ Med Cent). 2008 Apr;21(2):127-32. doi: 10.1080/08998280.2008.11928377.

Melanoma is a prevalent and deadly disease with limited therapeutic options. Current prognostic factors are unable to adequately guide treatment. Circulating tumor cells are a disease-specific factor that can be used as a prognostic variable to guide therapy. Most...

Experimental investigation of local properties and statistics of optical vortices in random wave fields.

Physical review letters

Wang W, Hanson SG, Miyamoto Y, Takeda M.
PMID: 15783487
Phys Rev Lett. 2005 Mar 18;94(10):103902. doi: 10.1103/PhysRevLett.94.103902. Epub 2005 Mar 17.

We present the first direct experimental evidence of the local properties of optical vortices in a random laser speckle field. We have observed the Berry anisotropy ellipse describing the anisotropic squeezing of phase lines close to vortex cores and...

Complex amplitude correlations of dynamic laser speckle in complex ABCD optical systems.

Journal of the Optical Society of America. A, Optics, image science, and vision

Wang W, Hanson SG, Takeda M.
PMID: 16912746
J Opt Soc Am A Opt Image Sci Vis. 2006 Sep;23(9):2198-207. doi: 10.1364/josaa.23.002198.

Within the framework of complex ABCD-matrix theory, exact theoretical expressions are derived for the space-time-lagged cross-covariance functions of the fields valid for arbitrary (complex) ABCD-optical systems, i.e., systems that include Gaussian-shaped apertures and partially developed speckle. Specifically, we show...

Sweden beyond oil: the efficient use of energy.

Science (New York, N.Y.)

Johansson TB, Steen P, Bogren E, Fredriksson R.
PMID: 17815302
Science. 1983 Jan 28;219(4583):355-61. doi: 10.1126/science.219.4583.355.

Technology now being introduced in industry, buildings, and transportation is much more energy-efficient than today's average technology. Changes in production and consumption are tending to decrease the intensity of energy use. By applying available economic technology, it may be...

Metabolic engineering of Saccharomyces cerevisiae for the production of n-butanol.

Microbial cell factories

Steen EJ, Chan R, Prasad N, Myers S, Petzold CJ, Redding A, Ouellet M, Keasling JD.
PMID: 19055772
Microb Cell Fact. 2008 Dec 03;7:36. doi: 10.1186/1475-2859-7-36.

BACKGROUND: Increasing energy costs and environmental concerns have motivated engineering microbes for the production of "second generation" biofuels that have better properties than ethanol.RESULTS AND CONCLUSION: Saccharomyces cerevisiae was engineered with an n-butanol biosynthetic pathway, in which isozymes from...

Efficient electronic communication between two identical ferrocene centers in a hydrogen-bonded dimer.

Journal of the American Chemical Society

Sun H, Steeb J, Kaifer AE.
PMID: 16506759
J Am Chem Soc. 2006 Mar 08;128(9):2820-1. doi: 10.1021/ja060386z.

A novel ferrocene derivative that contains a donor-donor-acceptor-acceptor (DDAA) hydrogen bonding motif forms highly stable, noncovalent dimers in chloroform and dichloromethane solutions. Its voltammetric behavior and the observation of an intervalence charge-transfer band reveal that the two equivalent ferrocene...

Watching the assembly of an organ a single cell at a time using confocal multi-position photoactivation and multi-time acquisition.

Organogenesis

Kulesa PM, Stark DA, Steen J, Lansford R, Kasemeier-Kulesa JC.
PMID: 20539744
Organogenesis. 2009 Oct;5(4):238-47. doi: 10.4161/org.5.4.10482.

Tracing cell movements in vivo yields important clues to organogenesis, yet it has been challenging to accurately and reproducibly fluorescently mark single and small groups of cells to build a picture of tissue assembly. In the early embryo, the...

Vole cycles.

Trends in ecology & evolution

Lambin X, Ims RA, Steen H, Yoccoz NG.
PMID: 21237007
Trends Ecol Evol. 1995 May;10(5):204. doi: 10.1016/s0169-5347(00)89055-2.

No abstract available.

Speckle dynamics for intensity-modulated illumination.

Applied optics

Jakobsen ML, Hanson SG.
PMID: 18617985
Appl Opt. 2008 Jul 10;47(20):3674-80. doi: 10.1364/ao.47.003674.

We analyze the dynamics of laser speckle patterns, designed for sensing with a receiver, based on spatial filtering. The speckle translation arises after free-space propagation of light scattered from nonspecular surfaces of a solid object in motion. The speckle...

Speckle dynamics resulting from multiple interfering beams.

Journal of the Optical Society of America. A, Optics, image science, and vision

Yura HT, Hanson SG, Jakobsen ML.
PMID: 18246165
J Opt Soc Am A Opt Image Sci Vis. 2008 Feb;25(2):318-26. doi: 10.1364/josaa.25.000318.

The space-time intensity covariance function for illuminating an object giving rise to fully developed speckle is considered in the case where the object is illuminated with two spatially separated beams, or with a multitude of equidistant but spatially separated...

Using a hydrazone-protected benzenediazonium salt to introduce a near-monolayer of benzaldehyde on glassy carbon surfaces.

Journal of the American Chemical Society

Malmos K, Dong M, Pillai S, Kingshott P, Besenbacher F, Pedersen SU, Daasbjerg K.
PMID: 19281237
J Am Chem Soc. 2009 Apr 08;131(13):4928-36. doi: 10.1021/ja809816x.

A methodology is described for introducing a thin layer of covalently attached benzaldehyde on glassy carbon surfaces using aryl diazonium chemistry. Usually the electroreduction of aryl diazonium salts leads to the formation of an ill-defined multilayer because of the...

Quantization analysis of speckle intensity measurements for phase retrieval.

Applied optics

Maallo AM, Almoro PF, Hanson SG.
PMID: 20856282
Appl Opt. 2010 Sep 20;49(27):5087-94. doi: 10.1364/AO.49.005087.

Speckle intensity measurements utilized for phase retrieval (PR) are sequentially taken with a digital camera, which introduces quantization error that diminishes the signal quality. Influences of quantization on the speckle intensity distribution and PR are investigated numerically and experimentally...

Showing 13 to 24 of 2108 entries