Results 21 to 30 of about 1,186,597 (348)

Bistability in Interstellar Gas-Phase Chemistry [PDF]

Astrophys.J. 645 (2006) 314-323, 2006
We present an analysis of "bistability" in gas-phase chemical models of dark interstellar clouds. We identify the chemical mechanisms that allow high- and low-ionization solutions to the chemical rate-equations to coexist. We derive simple analytic scaling relations for the gas densities and ionization rates for which the chemistry becomes bistable. We
arxiv   +1 more source

Fate of drugs during wastewater treatment [PDF]

, 2013
This is the post-print version of the final paper published in TrAC Trends in Analytical Chemistry. The published article is available from the link below.
Andrási, Bagnall, Baker, Baker, Barceló, Bedding, Bernhard, Brodin, Bruce Petrie, Buisson, Carbonaro, Chen, Chiaia-Hernandez, Chiu, Clara, Coelho, Duan, Elise Cartmell, Ewan J. McAdam, Ferrer, Galus, Gardner, Gaulke, Gomes, Gomes, Gomes, Gong, Grabic, Gracia-Lor, Gros, Gros, Grover, Guibaud, Gunnarsson, Göbel, Hashimoto, Helbling, Hignite, Ho, Hoigne, Huber, Huber, Huntscha, Hörsing, Ifelebuegu, Jelic, John N. Lester, Jones, Jones, Jones, Jones, Joss, Kasprzyk-Hordern, Khunjar, Kim, Kimura, Kosjek, Kreuzinger, Langford, Lishman, López-Serna, López-Serna, Marchese, Mark D. Scrimshaw, Matamoros, Maurer, McAdam, Metcalfe, Nakada, Nakada, Nieto, Ort, Ort, Petrie, Radjenovic, Radjenović, Reungoat, Robertson, Rosal, Samaras, Schaar, Sebők, Shen, Silva, Snyder, Snyder, Sumpter, Ternes, Ternes, Urase, Vader, Wagner, Wu, Wunder, Yang, Zearley, Zhao, Zorita, Zuloaga   +98 more
core   +2 more sources

Universal model for exoergic bimolecular reactions and inelastic processes [PDF]

Physical Review Letters 105, 263203 (2010), 2010
From a rigorous multichannel quantum-defect formulation of bimolecular processes, we derive a fully quantal and analytic model for the total rate of exoergic bimolecular reactions and/or inelastic processes that is applicable over a wide range of temperatures including the ultracold regime.
arxiv   +1 more source

MALDI-MS at the Ingenieurschule Burgdorf: The Technique, Some Applications and Expected Benefits for the Education in Modern Analytical Chemistry [PDF]

, 1997
Analytical chemistry is changing rapidly, new methods are developed and introduced in the analytical laboratories. Parallel to this progress, the chemical industry is undergoing pronounced changes: it is focusing more and more on the life sciences ...
Schär, Martin
core   +2 more sources

Ab-initio non-relativistic quantum electrodynamics: Bridging quantum chemistry and quantum optics from weak to strong coupling [PDF]

Phys. Rev. A 98, 043801 (2018), 2018
By applying the Born-Huang expansion, originally developed for coupled nucleus-electron systems, to the full nucleus-electron-photon Hamiltonian of non-relativistic quantum electrodynamics (QED) in the long-wavelength approximation, we deduce an exact set of coupled equations for electrons on photonic energy surfaces and the nuclei on the resulting ...
arxiv   +1 more source

Analytical Chemistry in Russia [PDF]

Fresenius' Journal of Analytical Chemistry, 1993
Research in Russian analytical chemistry (AC) is carried out on a significant scale, and the analytical service solves practical tasks of geological survey, environmental protection, medicine, industry, agriculture, etc. The education system trains highly skilled professionals in AC.
openaire   +4 more sources

Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia

FEBS Letters, EarlyView.
This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley   +1 more source

Analytical Chemistry in Food Science [PDF]

, 1997
Analytical chemistry presents a traditional and important tool in food science. Its development grew out of governmental food control to verify food composition and wholesomeness.
Amadò, Renato, Escher, Felix, Manzardo, Giuseppe   +2 more
core   +2 more sources

Diphthamide synthesis is linked to the eEF2‐client chaperone machinery

FEBS Letters, EarlyView.
The diphthamide modification of eukaryotic translation elongation factor 2 (eEF2) is important for accurate protein synthesis. We addressed the potential coordination of de novo eEF2 synthesis with simultaneous or subsequent diphthamide modification. Our work reveals that the co‐chaperones Hgh1 and Cpr7, which are known to support folding of nascent ...
Lars Kaduhr, Klaus Mayer, Raffael Schaffrath, Johannes Buchner, Ulrich Brinkmann   +4 more
wiley   +1 more source

An incomplete taxonomy of self-assigned color specialties [PDF]

arXiv, 2022
Every discipline in science or professional practice can be sub-divided into specialties and subspecialties. E.g., in medicine a doctor could indicate that their specialty is ophthalmology and their sub-specialty the retina, or in chemistry a specialty could be analytical chemistry and a sub-specialty spectroscopy. But, what are the specialties and sub-
arxiv