Results 81 to 90 of about 45,338 (207)

Spectroscopic analysis of bacterial photoreactivation

Photochemistry and Photobiology, Volume 101, Issue 2, Page 494-504, March/April 2025.
This study investigates the effectiveness of fluorescence and Raman spectroscopy in detecting bacterial photoreactivation. Fluorescence spectroscopy shows limitations, because the intense fluorescence of tryptophan and tyrosine masks fluorescence emitted by thymine molecules.
Keyvan Khosh Abady, Negar Karpourazar, Arjun Krishnamoorthi, Runze Li, Peter M. Rentzepis   +4 more
wiley   +1 more source

Action spectroscopy of SrCl$^+$ using an integrated ion trap time-of-flight mass spectrometer

, 2014
The photodissociation cross-section of SrCl$^+$ is measured in the spectral range of 36000 -- 46000 cm$^{-1}$ using a modular time-of-flight mass spectrometer (TOF-MS). By irradiating a sample of trapped SrCl$^+$ molecular ions with a pulsed dye laser, X$
Hudson, Eric R., Kotochigova, Svetlana, Petrov, Alexander, Puri, Prateek, Schowalter, Steven J.   +4 more
core   +1 more source

Thermodynamics and Chemistry of the Early Universe [PDF]

, 2018
The interplay between chemistry and thermodynamics determines the final outcome of the process of gravitational collapse and sets the conditions for the formation of the first cosmological objects, including primordial supermassive black holes.
Bovino, Stefano, Galli, Daniele
core   +2 more sources

Optimization of photobiomodulation therapy for spinal cord injury: A review

Photochemistry and Photobiology, EarlyView.
Photobiomodulation (PBM) therapy in the red and near‐infrared range can significantly modulate the secondary injury response and promote the reparative and regenerative potential of neural tissue after spinal cord injury (SCI). At present, due to the nature of delivery methods, the most effective dose and irradiance at the injury site to optimize ...
Isabella K. M. Drew, Alan R. Harvey, Vincent P. Wallace, Stuart I. Hodgetts   +3 more
wiley   +1 more source

The radiative association of PO/PH+ and the photodissociation of PH+

Frontiers in Astronomy and Space Sciences
The potential energy curves (PECs) and transition dipole moments (TDMs) of PH+ and PO are computed with the multireference configuration interaction method, and the cross-sections for the radiative association (RA) of PH+ and PO, which is the most ...
Yang Chen, Xiaohe Lin, Lidan Xiao, Zijian Li, Songbin Zhang, Yongjun Cheng, Yong Wu, Bing Yan   +7 more
doaj   +1 more source

Prediction of forbidden ultraviolet and visible emissions in comet 67P/Churyumov-Gerasimenko

, 2015
Remote observation of spectroscopic emissions is a potential tool for the identification and quantification of various species in comets. CO Cameron band (to trace \cod) and atomic oxygen emissions (to trace H$_2$O and/or CO$_2$, CO) have been used to ...
Bhardwaj, Anil, Galand, Marina, Raghuram, Susarla   +2 more
core   +1 more source

Model for Cameron band emission in comets: A case for EPOXI mission target comet 103P/Hartley 2 [PDF]

, 2010
The CO2 production rate has been derived in comets using the Cameron band (a3Pi - X1Sigma) emission of CO molecule assuming that photodissociative excitation of CO2 is the main production mechanism of CO in a3Pi metastable state.
Anil Bhardwaj, Bhardwaj, Bhardwaj, Bhardwaj, Bhardwaj, Bhardwaj, Bhardwaj, Bhardwaj, Boice, Campbell, Capria, Colangeli, Conway, Crovisier, Feldman, Feldman, Gilijamse, Groussin, Haider, Huebner, Ip, Jackman, Körösmezey, Lawrence, Lisse, McPhate, Nicholls, Richards, Rosati, Rosati, Sahnow, Schmidt, Seiersen, Shunk, Skrzypkowski, Snodgrass, Snodgrass, Susarla Raghuram, Tobiska, Tozzi, Weaver, Wysong   +41 more
core   +2 more sources

Simulating cold atomic hydrogen production in linear radiofrequency ion traps

New Journal of Physics
We simulated the motion of ${\mathrm{BaH^{+}}}$ molecular ions which are sympathetically cooled by laser-cooled ${\mathrm{Ba^{+}}}$ ions in linear quadrupole and octupole radiofrequency (RF) ion traps.
Nikita Poljakov, Muhammed Sameed, Steven Armstrong Jones   +2 more
doaj   +1 more source

CALCULATION OF CHEMICAL EQUILIBRIUM IN THE INTERSTELLAR CLOUD

Odessa Astronomical Publications, 2017
In order to calculate the molecular concentrations in the interstellar cloud and to obtain heir spatial distribution we have made a computational code to solve the set of equations for chemical equilibrium and equations of charge and atom balance.
I. Shmeld, J. Freimanis, N. G. Bochkarev
doaj   +1 more source

Photodesorption of water ice: a molecular dynamics study

, 2008
Absorption of ultraviolet radiation by water ice coating interstellar grains can lead to dissociation and desorption of the ice molecules. These processes are thought to be important in the gas-grain chemistry in molecular clouds and protoplanetary disks,
Aikawa, Al-Halabi, Al-Halabi, Andersson, Andersson, Berendsen, Bergeld, Bergin, Bergin, Boonman, Caselli, Ceccarelli, Cuppen, d'Hendecourt, d'Hendecourt, Dalgarno, Dobbyn, Dominik, E. F. van Dishoeck, Ehrenfreund, Elles, Fraser, Garrod, Gerakines, Ghormley, Gibb, Hagen, Hartquist, Holtom, Jewitt, Jorgensen, Kimmel, Kimmel, Kobayashi, Léger, Mayer, Murakawa, Nishi, O'Neill, Palumbo, Pontoppidan, Pontoppidan, Pontoppidan, Prasad, S. Andersson, Shen, Smith, Snell, Snell, Spaans, Stäuber, Stäuber, van Dishoeck, van Harrevelt, van Harrevelt, Watanabe, Watanabe, Watanabe, Westley, Westley, Whittet, Willacy, Willner, Yabushita   +63 more
core   +1 more source