Results 21 to 30 of about 112,578 (285)

Protonation of maleic and fumaric acid in aqueous sulfuric acid solutions [PDF]

open access: yesJournal of the Serbian Chemical Society, 2000
The protonations of maleic and fumaric acid in an acidic medium (aqueous solutions of sulfuric acid) were followed spectrophotometrically at room temperature. The acid-base equilibria were characterised qualitatively and quantitatively.
ILINKA SPIREVSKA   +2 more
doaj   +3 more sources

Proton Radiobiology [PDF]

open access: yesCancers, 2015
In addition to the physical advantages (Bragg peak), the use of charged particles in cancer therapy can be associated with distinct biological effects compared to X-rays. While heavy ions (densely ionizing radiation) are known to have an energy- and charge-dependent increased Relative Biological Effectiveness (RBE), protons should not be very ...
Tommasino F., Durante M.
openaire   +4 more sources

Crystal structure, thermal and fluorescence properties of 2,2′:6′,2′′-terpyridine-1,1′,1′′-triium tetrachloridonickelate(II) chloride

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2017
The title compound, (C15H14N3)[NiCl4]Cl, comprises an NiII cation tetrahedrally coordinated by four chloride anions, a non-coordinating chloride anion and an essentially planar terpyridinium trication (tpyH33+), in which the central pyridinium ring forms
Ouahida Zeghouan   +3 more
doaj   +1 more source

The rate of the proton-proton reaction

open access: yesThe Astrophysical Journal, 1994
We re-evaluate the matrix element for the proton-proton reaction which is important for stellar-evolution calculations and for the solar-neutrino problem. We self-consistently determine the effect of vacuum polarization on the matrix element by first correcting the low-energy scattering data to account for vacuum polarization.
Kamionkowski, Marc, Bahcall, John N.
openaire   +2 more sources

On the Equality of the Proton-Proton and Proton-Neutron Interactions [PDF]

open access: yesPhysical Review, 1939
A comparison of the 1S proton-proton interaction and the 1S proton-neutron interaction has been made recently by Breit, Hoisington, Share, and Thaxton. It is the purpose of this letter to add a remark to the subject. With the meson type of potential, [C x e^(-lambda x r)]/r x lambda, a variational calculation has been made of the binding energy of H3 ...
Brown, Frederick W., Plesset, Milton S.
openaire   +2 more sources

Preparation of Chitin Nanofibers from Shrimp Shell Waste by Partial Deacetylation and Mechanical Treatment

open access: yesJournal of Natural Fibers, 2023
Chitin is one of the most abundant biopolymers in nature. Herein, we report the successful preparation of chitin nanofibers (ChNFs) from shrimp shell waste using a partial deacetylation process with NaOH and high-speed blending.
Anyaporn Boonmahitthisud   +2 more
doaj   +1 more source

Strangeness production in proton—proton and proton—nucleus collisions [PDF]

open access: yesPramana, 2006
16 pages, 9 figures, Talk presented in the workshop on Hadron Physics, Puri, India, March 7-17 ...
openaire   +2 more sources

Protonated and Cationic Helium Clusters

open access: yesMolecules, 2020
Protonated rare gas clusters have previously been shown to display markably different structures compared to their pure, cationic counterparts. Here, we have performed high-resolution mass spectrometry measurements of protonated and pristine clusters of ...
Linnea Lundberg   +4 more
doaj   +1 more source

Proton–proton, anti-proton–anti-proton, proton–anti-proton correlations in Au + Au collisions measured by STAR at RHIC [PDF]

open access: yesThe European Physical Journal C, 2006
The analysis of two-particle correlations provides a powerful tool to study the properties of hot and dense matter created in heavy-ion collisions at ultra-relativistic energies. Applied to identical and non-identical hadron pairs, it makes the study of space-time evolution of the source in femtoscopic scale possible.
openaire   +1 more source

Observation of partonic flow in proton—proton and proton—nucleus collisions [PDF]

open access: yesNature Communications
Abstract Quantum Chromodynamics predicts a phase transition from hadronic matter to quark–gluon plasma (QGP) at high temperatures and energy densities, where quarks and gluons (partons) are no longer confined within hadrons. The QGP forms in ultrarelativistic heavy-ion collisions.
null, null   +1005 more
openaire   +10 more sources

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