Results 231 to 240 of about 366,297 (354)

A formalization of ``nothing''.

Notre Dame Journal of Formal Logic, 1975
openaire   +3 more sources

When Light Challenges Heat: Mechanistic Insights Into a Reaction Competing With Cadogan Cyclisation in Nitro‐Perylenediimides

Chemistry – A European Journal, EarlyView.
Visible‐light irradiation of nitro‐perylenediimide in the presence of triphenylphosphine reveals an unexpected pathway competing with the classical Cadogan cyclization. Mechanistic investigations uncover the rapid and selective formation of bay‐functionalized 1‐iminophosphorane‐12‐hydroxy perylenediimide derivatives.
Manuel Pedrón Laserna, Ilaria Ciofini, Piétrick Hudhomme   +2 more
wiley   +1 more source

A new formalism for reference dosimetry of small and nonstandard fields.

Medical Physics (Lancaster), 2008
R. Alfonso, P. Andreo, R. Capote, M. Huq, W. Kilby, P. Kjäll, T. R. Mackie, H. Palmans, K. Rosser, J. Seuntjens, W. Ullrich, S. Vatnitsky   +11 more
semanticscholar   +1 more source

Titanium‐Catalyzed Diastereoselective Keto‐ and Iminonitrile Cyclizations

Chemistry – A European Journal, EarlyView.
The titanium(III)‐catalyzed diastereoselective cyclization of readily‐available substituted ketonitriles gives cyclopentanones in good yield and stereoselectivity. Subsequent 1,2‐addition allows the preparation of cyclopentyls with three consecutive stereocenters.
Christoph Kern, Ritu Singh, Michael A. Unkrig‐Bau, Lukas Jakob, Jan Streuff   +4 more
wiley   +1 more source

Validation of absolute dose calculation of a single 125I-seed for ophthalmic brachytherapy within distance range 1-15 mm using a diode detector. [PDF]

Acta Oncol
Rintala A, Reijonen V, Valve A, Tenhunen M.   +3 more
europepmc   +1 more source

Non‐negative Gaussian estimation of variance components in random effects models

Canadian Journal of Statistics, EarlyView.
Abstract When used to estimate variance components (VCs), confidence intervals (CIs) can be truncated at zero, have a point estimate not in the quoted CI, be empty with positive probability, or be all‐inclusive. This is because they have conflicting dual roles, since they are considered to cover the parameter with a specified probability while also ...
André Plante, Michael Plante
wiley   +1 more source

Symmetric and Antisymmetric Quantum States from Graph Structure and Orientation. [PDF]

Entropy (Basel)
de Jesus MR, Hoefel EOC, Angelo RM.
europepmc   +1 more source

Solvation Structure and Dynamics of the Thiocyanate Anion in mixed N,N‐Dimethylformamide‐Water Solvents: A Molecular Dynamics Approach

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The solvation structure and dynamics of the SCN− anion in mixed N, N‐Dimethylformamide (DMF)‐water liquid solvents is investigated using classical molecular dynamics simulations. A preferential solvation of SCN− by the water molecules is observed in the first hydration shell, followed by a second shell consisting by both DMF and water molecules.
Ioannis Skarmoutsos, Ilias G. Karvounis
wiley   +1 more source

Exact-Factorization Framework for Electron-Nuclear Dynamics in Electromagnetic Fields. [PDF]

J Chem Theory Comput
Nazarov VU, Gross EKU.
europepmc   +1 more source

ELEMENTARY FORMAL SYSTEMS AND FORMAL LANGUAGES-SIMPLE FORMAL SYSTEMS

Memoirs of the Faculty of Science, Kyushu University. Series A, Mathematics, 1970
openaire   +2 more sources