Investigations of chemical reactions between single levitated magnesium chloride microdroplets with SO2 and NOx by means of Raman spectroscopy and elastic light scattering

1999 ◽  
Vol 1 (24) ◽  
pp. 5497-5502 ◽  
Author(s):  
Jeanette Musick ◽  
Jürgen Popp
Keyword(s):  
Raman Spectroscopy ◽  
Light Scattering ◽  
Chemical Reactions ◽  
Magnesium Chloride ◽  
Elastic Light Scattering

Crystallization of Tungstenbronze Phase and its Inelastic Light Scattering in Niobiophosphate-System Glass

2013 ◽  
Vol 566 ◽  
pp. 306-309
Author(s):  
Yoshihiro Takahashi ◽  
Nobuhiro Fujie ◽  
Minoru Osada ◽  
Rie Ihara ◽  
Takumi Fujiwara
Keyword(s):  
Raman Spectroscopy ◽  
Phase Separation ◽  
Light Scattering ◽  
Glass Ceramics ◽  
Supercooled Liquid ◽  
Rich Region ◽  
Elastic Light Scattering ◽  
Inelastic Light Scattering ◽  
Scattering Spectra

We prepared a niobiophosphate-glass-crystallizing tungstenbronze-type Ba2NaNb5O15and measured elastic light scattering spectrain situin the glass-ceramics fabrication regime. We found that the studied glass possesses a strong tendency for phase separation into Al2O3P2O5and Nb-rich regions prior to crystallization. It is suggested that the tungstenbronze phase crystallizes in the Nb-rich region separated from the supercooled liquid phase. This study demonstrated thatin situRaman spectroscopy is also useful for observing the phase separation dynamics in glass.

scholarly journals Characterization of Wet-Heat Inactivation of Single Spores of Bacillus Species by Dual-Trap Raman Spectroscopy and Elastic Light Scattering

2010 ◽  
Vol 76 (6) ◽  
pp. 1796-1805 ◽  
Author(s):  
Pengfei Zhang ◽  
Lingbo Kong ◽  
Peter Setlow ◽  
Yong-qing Li
Keyword(s):  
Heat Treatment ◽  
Raman Spectroscopy ◽  
Light Scattering ◽  
Protein Denaturation ◽  
Dipicolinic Acid ◽  
High Temperature Treatment ◽  
Heat Inactivation ◽  
Bacillus Species ◽  
Elastic Light Scattering ◽  
Wet Heat

ABSTRACT Dual-trap laser tweezers Raman spectroscopy (LTRS) and elastic light scattering (ELS) were used to investigate dynamic processes during high-temperature treatment of individual spores of Bacillus cereus, Bacillus megaterium, and Bacillus subtilis in water. Major conclusions from these studies included the following. (i) After spores of all three species were added to water at 80 to 90°C, the level of the 1:1 complex of Ca2+ and dipicolinic acid (CaDPA; ∼25% of the dry weight of the spore core) in individual spores remained relatively constant during a highly variable lag time (T lag), and then CaDPA was released within 1 to 2 min. (ii) The T lag values prior to rapid CaDPA release and thus the times for wet-heat killing of individual spores of all three species were very heterogeneous. (iii) The heterogeneity in kinetics of wet-heat killing of individual spores was not due to differences in the microscopic physical environments during heat treatment. (iv) During the wet-heat treatment of spores of all three species, spore protein denaturation largely but not completely accompanied rapid CaDPA release, as some changes in protein structure preceded rapid CaDPA release. (v) Changes in the ELS from individual spores of all three species were strongly correlated with the release of CaDPA. The ELS intensities of B. cereus and B. megaterium spores decreased gradually and reached minima at T 1 when ∼80% of spore CaDPA was released, then increased rapidly until T 2 when full CaDPA release was complete, and then remained nearly constant. The ELS intensity of B. subtilis spores showed similar features, although the intensity changed minimally, if at all, prior to T 1. (vi) Carotenoids in B. megaterium spores' inner membranes exhibited two changes during heat treatment. First, the carotenoid's two Raman bands at 1,155 and 1,516 cm−1 decreased rapidly to a low value and to zero, respectively, well before T lag, and then the residual 1,155-cm−1 band disappeared, in parallel with the rapid CaDPA release beginning at T lag.

QUASI-ELASTIC LIGHT SCATTERING STUDIES OF THE KINETICS OF LYSOZYME DIMERIZATION

1972 ◽  
Vol 33 (C1) ◽  
pp. C1-169-C1-169
Author(s):  
Y. YEY ◽  
T. M. SCHUSTER ◽  
D. A. YPHANTIS
Keyword(s):  
Light Scattering ◽  
Elastic Light Scattering ◽  
Kinetics Of

The light-scattering Mueller matrices for Rayleigh and Rayleigh-Gans-Debye approximation

1990 ◽  
Vol 55 (12) ◽  
pp. 2889-2897
Author(s):  
Jaroslav Holoubek
Keyword(s):  
Light Scattering ◽  
Theoretical Work ◽  
Matrix Elements ◽  
Elastic Light Scattering ◽  
Yield Information ◽  
Recent Theoretical Work ◽  
Particle Parameters ◽  
Complete Set ◽  
Single Matrix ◽  
Scattering Matrix Elements

Recent theoretical work has shown that the complete set of polarized elastic light-scattering studies should yield information about scatterer structure that has so far hardly been utilized. We present here calculations of angular dependences of light-scattering matrix elements for spheres near the Rayleigh and Rayleigh-Gans-Debye limits. The significance of single matrix elements is documented on examples that show how different matrix elements respond to changes in particle parameters. It appears that in the small-particle limit (Rg/λ < 0.1) we do not loose much information by ignoring "large particle" observables.

Inversion of low-angle elastic light-scattering data with a new method devised by modification of the Chahine algorithm

1997 ◽  
Vol 36 (30) ◽  
pp. 7539 ◽  
Author(s):  
Fabio Ferri ◽  
Gabriella Righini ◽  
Enrico Paganini
Keyword(s):  
Light Scattering ◽  
New Method ◽  
Scattering Data ◽  
Elastic Light Scattering

scholarly journals In-situ plasmon-driven chemical reactions revealed by high vacuum tip-enhanced Raman spectroscopy

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Mengtao Sun ◽  
Zhenglong Zhang ◽  
Hairong Zheng ◽  
Hongxing Xu
Keyword(s):  
Raman Spectroscopy ◽  
Chemical Reactions ◽  
High Vacuum ◽  
Tip Enhanced Raman Spectroscopy

Dynamic instability of sheared microtubules observed by quasi-elastic light scattering

Science ◽  
1988 ◽  
Vol 241 (4873) ◽  
pp. 1642-1645
Author(s):  
RA Keates ◽  
FR Hallett
Keyword(s):  
Light Scattering ◽  
Dynamic Instability ◽  
Elastic Light Scattering
Sign in / Sign up

Export Citation Format

Share Document