Results 21 to 30 of about 211,193 (207)
Research Progress on Chiral Supramolecular Sensors for Enantiomer Detection
Chemosensors, 2023 Chiral substances occur naturally in abiotic and living systems. The recognition and detection of chiral substances in the natural environment or their analysis and detection in biological systems are crucial.
Xiao-Fan Wu +6 more
doaj +1 more source
On the origin of fluorine in the Milky Way
, 2004 The main astrophysical factories of fluorine (19F) are thought to be Type II supernovae, Wolf-Rayet stars, and the asymptotic giant branch (AGB) of intermediate mass stars.
Agostino Renda +43 more
core +2 more sources
Fluorine abundances in planetary nebulae
, 2005 We have determined fluorine abundances from the F II 4789 and F IV 4060 nebular emission lines for a sample of planetary nebulae (PNe). Our results show that fluorine is generally overabundant in PNe, thus providing new evidence for the synthesis of ...
Butler K. +6 more
core +1 more source
The Abundance of Interstellar Fluorine and Its Implications [PDF]
, 2006 We report results from a survey of neutral fluorine (F I) in the interstellar medium. Data from the Far Ultraviolet Spectroscopic Explorer (FUSE) were used to analyze 26 lines of sight lying both in the galactic disk and halo, including lines to Wolf ...
Adam G. Jensen +5 more
core +3 more sources
Nuclear Magnetic Resonance Fluorine—Fluorine Coupling Constants [PDF]
The Journal of Chemical Physics, 1964 The pattern of fluorine—fluorine coupling constants is explained on the basis of two mechanisms for nuclear spin—spin coupling: the ``through-bond'' and the ``through-space'' mechanisms. In the former, the interaction proceeds via the electronic structure in the intervening bonds.
Ng, Soon, Sederholm, C.H.
openaire +2 more sources
Annals of the ICRP, 1983 Considering the long time in which fluorine compounds have been used it seems rather surprising that it was not isolated as an element until 1886. This long delay was not due to lack of effort, but to the reactivity of fluorine and the hazards of working with it and many of its compounds.
Langley, Richard H., Welch, Larry
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Macromolecular Materials and Engineering, 2020 Controllable synthesis of high‐performance materials with low‐cost is critical for the development of functional devices. Herein, a series of sequence‐controlled low‐dispersity oligomers with acid–base chromotropic capability via simple copolymerization ...
Congcong Zhai +6 more
doaj +1 more source
Defence Technology, 2023 An in-depth analysis on the cooperativity of intermolecular interactions including hydrogen bonding and π-π stacking in 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) crystal was studied.
Zhi-xiang Zhang +7 more
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Some neutron and gamma radiation characteristics of plutonium cermet fuel for isotopic power sources [PDF]
, 1972 Gamma and neutron measurements on various types of plutonium sources are presented in order to show the effects of O-17, O-18 F-19, Pu-236, age of the fuel, and size of the source on the gamma and neutron spectra.
Anderson, M. E. +3 more
core +2 more sources
Ultrasonics Sonochemistry3-Nitro-1,2,4-triazol-5-one (NTO), a well-known energetic material, is extensively employed in the field of insensitive munitions. However, its irregular crystal morphology and broad particle-size distribution hinder its wider application.
Xingquan Hu +6 more
doaj +1 more source