Results 11 to 20 of about 3,237,123 (202)

The effect of atmospheric turbulence on the propagation properties of optical vortices formed by using coherent laser beam arrays [PDF]

, 2008
In this paper, we consider the effect of atmospheric turbulence on the propagation of an optical vortex, which may be formed from a radial coherent laser beam array with an initially well-defined phase distribution.
Li-Gang Wang, Weihua Zheng, Li-Qin Wang
semanticscholar   +3 more sources

A MALDI-TOF MS Approach for Mammalian, Human, and Formula Milks’ Profiling [PDF]

Nutrients, 2018
Human milk composition is dynamic, and substitute formulae are intended to mimic its protein content. The purpose of this study was to investigate the potentiality of matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF
L. Di Francesco, F. Di Girolamo, M. Mennini, A. Masotti, Guglielmo Salvatori, Giuliano Rigon, F. Signore, E. Pietrantoni, M. Scapaticci, Isabella Lante, B. Goffredo, Oscar Mazzina, A. I. Elbousify, P. Roncada, A. Dotta, A. Fiocchi, L. Putignani   +16 more
semanticscholar   +3 more sources

Chemical composition of nanoparticles from α-pinene nucleation and the influence of isoprene and relative humidity at low temperature [PDF]

Atmospheric Chemistry and Physics, 2021
Biogenic organic precursors play an important role in atmospheric new particle formation (NPF). One of the major precursor species is α-pinene, which upon oxidation can form a suite of products covering a wide range of volatilities.
L. Caudillo, B. Rörup, M. Heinritzi, G. Marie, M. Simon, A. C. Wagner, T. Müller, T. Müller, M. Granzin, A. Amorim, F. Ataei, R. Baalbaki, B. Bertozzi, Z. Brasseur, R. Chiu, B. Chu, L. Dada, J. Duplissy, J. Duplissy, H. Finkenzeller, L. Gonzalez Carracedo, X.-C. He, V. Hofbauer, W. Kong, W. Kong, H. Lamkaddam, C. P. Lee, B. Lopez, N. G. A. Mahfouz, V. Makhmutov, V. Makhmutov, H. E. Manninen, R. Marten, D. Massabò, R. L. Mauldin, R. L. Mauldin, B. Mentler, U. Molteni, U. Molteni, U. Molteni, A. Onnela, J. Pfeifer, M. Philippov, A. A. Piedehierro, M. Schervish, W. Scholz, B. Schulze, J. Shen, D. Stolzenburg, Y. Stozhkov, M. Surdu, C. Tauber, Y. J. Tham, P. Tian, A. Tomé, S. Vogt, M. Wang, D. S. Wang, S. K. Weber, A. Welti, W. Yonghong, W. Yusheng, M. Zauner-Wieczorek, U. Baltensperger, I. El Haddad, R. C. Flagan, A. Hansel, A. Hansel, K. Höhler, J. Kirkby, J. Kirkby, M. Kulmala, M. Kulmala, M. Kulmala, K. Lehtipalo, K. Lehtipalo, O. Möhler, H. Saathoff, R. Volkamer, P. M. Winkler, N. M. Donahue, A. Kürten, J. Curtius   +82 more
doaj   +1 more source

Making Sense of Helices: Right and Wrong Models in Science and Art

Molecular Frontiers Journal, 2023
Helices are ubiquitous in art and nature. Independent of their pitch and sense of rotation (handedness), helices in sculpture, painting, architecture, scientific illustrations, conference announcements, logos, and advertising are eye-catching and ...
Martin Egli, Shuguang Zhang
doaj   +1 more source

Oligomer formation from the gas-phase reactions of Criegee intermediates with hydroperoxide esters: mechanism and kinetics [PDF]

Atmospheric Chemistry and Physics, 2022
Hydroperoxide esters, formed in the reactions of carbonyl oxides (also called Criegee intermediates, CIs) with formic acid, play a crucial role in the formation of secondary organic aerosol (SOA) in the atmosphere.
L. Chen, L. Chen, Y. Huang, Y. Huang, Y. Xue, Y. Xue, Z. Jia, W. Wang   +7 more
doaj   +1 more source

Zinc Binding to Fulvic acids: Assessing the Impact of pH, Metal Concentrations and Chemical Properties of Fulvic Acids on the Mechanism and Stability of Formed Soluble Complexes

Molecules, 2020
The aim of the study was defined as a complementary analysis of molecular interactions between zinc (Zn) and fulvic acids (FAs) at a broad pH range (3–7), different metal concentrations (0–50 mg dm−3) and chemical properties of FAs and their impact on ...
P. Boguta, Z. Sokołowska
semanticscholar   +1 more source

Composition and volatility of secondary organic aerosol (SOA) formed from oxidation of real tree emissions compared to simplified volatile organic compound (VOC) systems [PDF]

Atmospheric Chemistry and Physics, 2020
Secondary organic aerosol (SOA) is an important constituent of the atmosphere where SOA particles are formed chiefly by the condensation or reactive uptake of oxidation products of volatile organic compounds (VOCs).
A. Ylisirniö, A. Buchholz, C. Mohr, C. Mohr, Z. Li, L. Barreira, L. Barreira, A. Lambe, C. Faiola, C. Faiola, E. Kari, E. Kari, T. Yli-Juuti, S. A. Nizkorodov, D. R. Worsnop, A. Virtanen, S. Schobesberger   +16 more
doaj   +1 more source

Atmospheric Conditions within Big Telescope Alt-Azimuthal Region and Possibilities of Astronomical Observations

Remote Sensing, 2022
The paper presents the results of analysis of astroclimatic conditions in the Big Telescope Alt-azimuthal (BTA) region (40°N–50°N; 35°E–55°E). Using data from the European center for medium-range weather forecast ReAnalysis (ERA-5), we estimated the ...
Artem Yu. Shikhovtsev, Pavel G. Kovadlo, Vladimir B. Khaikin, Victor V. Nosov, Vladimir P. Lukin, Eugene V. Nosov, Andrey V. Torgaev, Alexander V. Kiselev, Maxim Yu. Shikhovtsev   +8 more
doaj   +1 more source

Complex refractive indices in the ultraviolet and visible spectral region for highly absorbing non-spherical biomass burning aerosol [PDF]

Atmospheric Chemistry and Physics, 2021
Biomass burning aerosol is a major source of PM2.5, and significantly affects Earth's radiative budget. The magnitude of its radiative effect is poorly quantified due to uncertainty in the optical properties of aerosol formed from biomass burning.
C. C. Womack, C. C. Womack, K. M. Manfred, K. M. Manfred, K. M. Manfred, N. L. Wagner, N. L. Wagner, N. L. Wagner, G. Adler, G. Adler, G. Adler, A. Franchin, A. Franchin, A. Franchin, K. D. Lamb, K. D. Lamb, K. D. Lamb, A. M. Middlebrook, J. P. Schwarz, C. A. Brock, S. S. Brown, S. S. Brown, R. A. Washenfelder   +22 more
doaj   +1 more source

Formulae for well formed formulae and their enumeration [PDF]

Journal of the Australian Mathematical Society, 1974
1. General Idea. In this paper formal operators and bracketings devices are essentially the same; so are well formed formulae and correct bracketings.A well known theorem of symbolic logic (Post languages, etc.) and universal algebra characterizes well formed formulae among (linear) strings of symbols for variables and operators in terms of a system of
openaire   +2 more sources