Results 21 to 30 of about 2,490,747 (186)

The running of the electromagnetic coupling alpha in small-angle Bhabha scattering [PDF]

open access: yes, 2004
A method to determine the running of alpha from a measurement of small-angle Bhabha scattering is proposed and worked out. The method is suited to high statistics experiments at e+e- colliders, which are equipped with luminometers in the appropriate ...
102   +28 more
core   +1 more source

Synthesis of Triazole-Containing Furanosyl Nucleoside Analogues and Their Phosphate, Phosphoramidate or Phoshonate Derivatives as Potential Sugar Diphosphate or Nucleotide Mimetics.

open access: yesChemPlusChem, 2020
The synthesis of stable and potentially bioactive xylofuranosyl nucleoside analogues and potential sugar diphosphate or nucleotide mimetics comprising a 1,2,3-triazole moiety is reported. 3'-O-Methyl-branched N-benzyltriazole isonucleosides were accessed
Andreia Fortuna   +4 more
semanticscholar   +1 more source

Non-metal-templated approaches to bis(borane) derivatives of macrocyclic dibridgehead diphosphines via alkene metathesis

open access: yesBeilstein Journal of Organic Chemistry, 2018
Two routes to the title compounds are evaluated. First, a ca. 0.01 M CH2Cl2 solution of H3B·P((CH2)6CH=CH2)3 (1·BH3) is treated with 5 mol % of Grubbs' first generation catalyst (0 °C to reflux), followed by H2 (5 bar) and Wilkinson's catalyst (55 °C ...
Tobias Fiedler   +3 more
doaj   +1 more source

Spontaneous generation of the Nambu --Jona-Lazinio interaction in quantum chromodynamics with two light quarks

open access: yes, 2005
In QCD with two light quarks with application of Bogolubov quasi-averages approach a possibility of spontaneous generation of an effective interaction, leading to the Nambu -- Jona-Lazinio model, is studied.
A. I. Alekseev   +19 more
core   +1 more source

Second Order Gauge Theory

open access: yes, 2007
A gauge theory of second order in the derivatives of the auxiliary field is constructed following Utiyama's program. A novel field strength $G=\partial F+fAF$ arises besides the one of the first order treatment, $F=\partial A-\partial A+fAA$.
Alekseev   +27 more
core   +1 more source

Copper‐Catalyzed Intramolecular Hydrophosphorylation of Alkynes: Straightforward Regio‐ and Stereoselective Access to Six‐Membered Phosphorus Heterocycles

open access: yesEuropean Journal of Organic Chemistry, Volume 28, Issue 48, December 22, 2025.
Ready access to six‐membered phosphorus heterocycles through copper‐catalyzed intramolecular hydrophosphorylation of ortho‐alkynyl secondary phosphine oxides is described. The reaction proceedes with high regio‐ and stereoselectivity. An atom‐economic copper‐catalyzed intramolecular hydrophosphorylation of ortho‐alkynyl secondary phosphine oxides ...
Hamdi Sanaa   +3 more
wiley   +1 more source

Non-perturbative solutions in the electro-weak theory with $\bar t t$ condensate and the $t$-quark mass

open access: yes, 2011
We apply Bogoliubov compensation principle to the gauge electro-weak interaction to demonstrate a spontaneous generation of anomalous three-boson gauge invariant effective interaction.
Bateman H.   +4 more
core   +1 more source

Isomerized Conjugated Molecules as Hole‐Selective Contacts for Inverted Perovskite Solar Cells

open access: yesSmall Structures, Volume 6, Issue 12, December 2025.
A BTBT (benzothieno[3,2‐b]benzothiophene) isomeric derivative, (2‐(benzo[b]benzo[4,5]thieno[2,3‐d]thiophen‐4‐yl)ethyl)phosphonic acid (BTBT‐Z), is reported. BTBT‐Z adopts a zig‐zag configuration with a sulfur opposite to the anchoring group. This structure enhances its interaction with the perovskite layer, improving crystallization and thin‐film ...
Qingqing Liu   +18 more
wiley   +1 more source

On relativization of the Sommerfeld-Gamow-Sakharov factor

open access: yes, 2011
The Sommerfeld-Gamow-Sakharov factor is considered for the general case of arbitrary masses and energies. It is shown that the scalar triangular one-loop diagram gives the Coulomb singularity in radiative corrections at the threshold.
A Arbuzov   +26 more
core   +1 more source

1,3‐Diazetidin‐2‐Ones: Synthetic Approaches and Therapeutic Promise within the Aza‐β‐Lactam Family

open access: yesEuropean Journal of Organic Chemistry, Volume 28, Issue 43, November 24, 2025.
This review explores the synthesis, reactivity, and therapeutic potential of 1,3‐diazetidin‐2‐ones—an underexplored class of aza‐β‐lactams. Emphasis is placed on synthetic challenges, emerging methodologies, and their promise as β‐lactamase‐resistant scaffolds in medicinal chemistry. 1,3‐diazetidin‐2‐ones, overlooked members of the aza‐β‐lactam family,
Jozef Kristek, Jiří Pospíšil
wiley   +1 more source

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