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Showing 1 to 12 of 155 entries
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Raman Spectroscopy of Oxide-Embedded and Ligand-Stabilized Silicon Nanocrystals.

The journal of physical chemistry letters

Hessel CM, Wei J, Reid D, Fujii H, Downer MC, Korgel BA.
PMID: 26288041
J Phys Chem Lett. 2012 May 03;3(9):1089-93. doi: 10.1021/jz300309n. Epub 2012 Apr 12.

Oxide-embedded and oxide-free alkyl-terminated silicon (Si) nanocrystals with diameters ranging from 3 nm to greater than 10 nm were studied by Raman spectroscopy. For ligand-passivated nanocrystals, the zone center Raman-active mode of diamond cubic Si shifted to lower frequency...

The detection of carbon dioxide leaks using quasi-tomographic laser absorption spectroscopy measurements in variable wind.

Atmospheric measurement techniques

Levine ZH, Pintar AL, Dobler JT, Blume N, Braun M, Scott Zaccheo T, Pernini TG.
PMID: 27453761
Atmos Meas Tech. 2016 Apr 13;9:1627-1636. doi: 10.5194/amt-9-1627-2016.

Laser absorption spectroscopy (LAS) has been used over the last several decades for the measurement of trace gasses in the atmosphere. For over a decade, LAS measurements from multiple sources and tens of retroreflectors have been combined with sparse-sample...

Modulation of TLR3/TLR4 inflammatory signaling by the GABAB receptor agonist baclofen in glia and immune cells: relevance to therapeutic effects in multiple sclerosis.

Frontiers in cellular neuroscience

Crowley T, Fitzpatrick JM, Kuijper T, Cryan JF, O'Toole O, O'Leary OF, Downer EJ.
PMID: 26283920
Front Cell Neurosci. 2015 Jul 28;9:284. doi: 10.3389/fncel.2015.00284. eCollection 2015.

The GABAB receptor agonist, baclofen, is used to treat muscle tightness and cramping caused by spasticity in a number of disorders including multiple sclerosis (MS), but its precise mechanism of action is unknown. Neuroinflammation drives the central pathology in...

Home-School Differences in Beliefs, Support, and Control during Public Pre-kindergarten and their Link to Children's Kindergarten Readiness.

Early childhood research quarterly

Barbarin OA, Downer J, Odom E, Head D.
PMID: 26568653
Early Child Res Q. 2010 3rd Quarter;25(3):258-272. doi: 10.1016/j.ecresq.2010.02.003.

This study examines the prevalence of home-school match in child-rearing beliefs and socialization practices (control and support) and their relation to ethnicity and readiness skills of children (

A field study of the generation of nitrate in a hill cap cloud.

Environmental pollution (Barking, Essex : 1987)

Choularton TW, Wicks AJ, Downer RM, Gallagher MW, Penkett SA, Bandy BJ, Dollard GJ, Jones BM, Davies TD, Gay MJ, Tyler BJ, Fowler D, Cape JN, Hargreaves KJ.
PMID: 15092051
Environ Pollut. 1992;75(1):69-73. doi: 10.1016/0269-7491(92)90058-i.

A field experiment to investigate the formation of nitrate as an airstream passes through a hill cap cloud has been performed at the UMIST field station on Great Dun Fell. It has been shown that the aerosol nitrate concentration...

A Technique for Automated Quantification of Canine Glucocorticoid-induced Isoenzyme of Alkaline Phosphatase.

Veterinary clinical pathology

Hoffmann WE, Sanecki RK, Dorner JL.
PMID: 15162331
Vet Clin Pathol. 1988;17(3):66-70. doi: 10.1111/j.1939-165x.1988.tb00493.x.

A sensitive assay for the corticosteroid-induced alkaline phosphatase isoenzyme (CAP), adaptable to most clinical chemistry autoanalyzers, is described and validated. This assay is based on the greater than 98% inhibition of liver alkaline phosphatase isoenzyme (LAP) activity with 4.2...

Characteristics of a 128 x 128 liquid-crystal spatial light modulator for wave-front generation.

Optics letters

Cho DJ, Thurman ST, Donner JT, Morris GM.
PMID: 18087400
Opt Lett. 1998 Jun 15;23(12):969-71. doi: 10.1364/ol.23.000969.

Spatial and temporal characteristics of a 128x128 zero-twist nematic liquid-crystal spatial light modulator are investigated for wave-front generation at a wavelength of 632.8 nm. The modulator is found to have the capability of producing at least eight phase levels...

Femtosecond microscopy of radial energy transport in a micrometer-scale aluminum plasma excited at relativistic intensity.

Optics letters

Bowes BT, Langhoff H, Downer MC, Wilcox M, Hou B, Nees J, Mourou G.
PMID: 16419896
Opt Lett. 2006 Jan 01;31(1):116-8. doi: 10.1364/ol.31.000116.

Using femtosecond microscopy, we observe subpicosecond transport of thermal energy radially outward from a micrometer-sized spot of an aluminum target following P-polarized excitation at >10(18) W/cm2 with a 24 fs pulse. The rapid expansion coincides with the onset of...

The possible role of ammonia in phototaxis of migrating slugs of Dictyostelium discoideum.

Proceedings of the National Academy of Sciences of the United States of America

Bonner JT, Chiang A, Lee J, Suthers HB.
PMID: 16593935
Proc Natl Acad Sci U S A. 1988 Jun;85(11):3885-7. doi: 10.1073/pnas.85.11.3885.

Previously we showed that the rising cell masses of cellular slime molds orient away from high concentrations of ammonia gas, presumably by speeding up the cells on one side. Here we show that in the same way NH(3) could...

Isolation of Citreoviridin from Penicillium charlesii Cultures and Molded Pecan Fragments.

Applied and environmental microbiology

Cole RJ, Dorner JW, Cox RH, Hill RA, Cluter HG, Wells JM.
PMID: 16345866
Appl Environ Microbiol. 1981 Oct;42(4):677-81. doi: 10.1128/aem.42.4.677-681.1981.

The extraction and systematic fractionation of Penicillium charlesii Smith cultures and contaminated pecan fragments yielded the yellow mycotoxin citreoviridin. Citreoviridin proved acutely toxic to 1-day-old chickens, with an oral 50% lethal dose of 37.5 mg/kg, and showed plant growth...

Nonresonant quadrupolar second-harmonic generation in isotropic solids by use of two orthogonally polarized laser beams.

Optics letters

Sun L, Figliozzi P, An YQ, Downer MC, Mochan WL, Mendoza BS.
PMID: 16190446
Opt Lett. 2005 Sep 01;30(17):2287-9. doi: 10.1364/ol.30.002287.

We demonstrate an experimental technique for isolating and enhancing quadrupolar second-harmonic generation in isotropic materials by using two orthogonally polarized laser beams that create wavelength-scale, forward-radiating gradients in the second-harmonic polarization.

Amplified femtosecond optical pulses and continuum generation at 5-kHz repetition rate.

Optics letters

Knox WH, Downer MC, Fork RL, Shank CV.
PMID: 19721665
Opt Lett. 1984 Dec 01;9(12):552-4. doi: 10.1364/ol.9.000552.

Pulses of 90-fsec duration from a cavity-dumped colliding-pulse mode-locked laser have been amplified to microjoule energies at 5-kHz repetition rate using a copper-vapor-laser pump source. Near-diffraction-limited focusing and efficient femtosecond continuum generation are demonstrated.

Showing 1 to 12 of 155 entries