Results 81 to 90 of about 4,252 (197)

DFT Study of Halide‐Free Mechanism of the CO2 Cycloaddition onto Epoxide by [PW11O39{Zn(H2O)}]5−: Evidences for the Formation of Hydrogencarbonate Intermediates

ChemCatChem, Volume 17, Issue 15, August 7, 2025.
The computational study, sustained by experimental data, of the catalytic activity of [PW11O39{Zn(H2O)}]5− in CO2 cycloaddition to epoxide highlights how the carbonic anhydrase‐like character of this complex couples to the versatile binding properties of the polyoxometalate in this reaction pathway. Abstract The intertwined experimental and theoretical
Jingjing Ren, Franck Launay, Richard Villanneau, Hélène Gérard   +3 more
wiley   +1 more source

Highly Shielded Peroxo‐Cerium(IV)‐Containing Polyoxometalate: Synthesis, Structure, and Oxidative Studies

ChemistryEurope, Volume 3, Issue 4, July 14, 2025.
The peroxo‐di‐cerium(IV)‐di‐lithium‐containing 32‐tungsto‐4‐phosphate [(CeIV2O2)Li2(P2W16O59)2]16− (Ce2Li2P4W32) is synthesized and structurally characterized. This peroxo‐polyanion demonstrates remarkable stability in solution across a broad pH range.
Anusree Sundar, Danica Bajuk‐Bogdanović, Gordana Ćirić‐Marjanović, Talha Nisar, Veit Wagner, Arnulf Materny, Geoffrey B. Jameson, Bassem S. Bassil, Ulrich Kortz   +8 more
wiley   +1 more source

OBTAINING A UNIQUE SPLINE FUNCTION TO INTERPOLATE A POLYNOMIAL WITH LACUNARY DATA VALUES [PDF]

Journal of Mechanics of Continua and Mathematical Sciences
The present paper deals with the problem of obtaining a unique spline function for approximating a polynomial function. We have given values of the polynomial; its first derivatives are at the node points and also the third derivatives are given at the
Pankaj Kumar Tripathi, Kulbhushan Singh
doaj   +1 more source

Controlling Lampenflora in Heritage Sites: In Situ Testing of Polyoxometalate–Ionic Liquids in the Pommery Champagne Cellar

ChemPlusChem, Volume 90, Issue 7, July 2025.
The article evaluates polyoxometalate–ionic liquids (POM–ILs) as biocidal agents against lampenflora in the UNESCO‐listed Pommery Champagne cellar. POM–ILs effectively inhibit microbial colonization over one year with minimal visual impact and outperform the commercial biocide Preventol RI80.
Stéphanie Eyssautier‐Chuine, Ludovic Besaury, Nathalie Vaillant‐Gaveau, Sandra Villaume, Anouck Habrant, Isabel Franco‐Castillo, Marine Rondeau, Dina Aggad, Maxime Gommeaux, Gilles Fronteau, Scott G. Mitchell   +10 more
wiley   +1 more source

On Approximations by Trigonometric Polynomials of Classes of Functions Defined by Moduli of Smoothness

Abstract and Applied Analysis, 2017
In this paper, we give a characterization of Nikol’skiĭ-Besov type classes of functions, given by integral representations of moduli of smoothness, in terms of series over the moduli of smoothness.
Nimete Sh. Berisha, Faton M. Berisha, Mikhail K. Potapov, Marjan Dema   +3 more
doaj   +1 more source

An analytical representation of airfoils [PDF]

INCAS Bulletin
An important part of the construction of an aircraft is the shape of the wings. Their aerodynamics involve numerous evaluations and simulations through fluid dynamics. The reduction of the evaluation times is achieved by a parametric function.
Valentin Ioan Remus NICULESCU, Mihnea BUTIURCA, Dumitru POPESCU, Stefan STEBLEA   +3 more
doaj   +1 more source

Lacunary Interpolation by Spline function (0,3) Case

Journal of Zankoy Sulaimani - Part A, 2003
The object of this paper is to obtain the existence, uniqueness and error bounds of quintic deficient splines interpolating the data (0,3).
Rostam S., Karwan J.
openaire   +1 more source

On an Erdős similarity problem in the large

Bulletin of the London Mathematical Society, Volume 57, Issue 6, Page 1801-1818, June 2025.
Abstract In a recent paper, Kolountzakis and Papageorgiou ask if for every ε∈(0,1]$\epsilon \in (0,1]$, there exists a set S⊆R$S \subseteq \mathbb {R}$ such that |S∩I|⩾1−ε$\vert S \cap I\vert \geqslant 1 - \epsilon$ for every interval I⊂R$I \subset \mathbb {R}$ with unit length, but that does not contain any affine copy of a given increasing sequence ...
Xiang Gao, Yuveshen Mooroogen, Chi Hoi Yip   +2 more
wiley   +1 more source

Sulfidation of CoMoP Catalysts: Genesis of the Mo Multiscale Organization from Oxides to Sulfides

ChemCatChem, Volume 17, Issue 7, April 4, 2025.
The genesis of the multiscale MoS2 organization followed by ASAXS (Anomalous Small Angle X‐Ray‐Scattering) and XPS shows a 3‐steps genesis: i) a depolymerization of AlMo6 into MoO42−, ii) a preferential sulfidation of the well‐dispersed species (i.e., MoO42−) into MoS2, and iii) a final restructuration of the slabs within the aggregates.
Candice Cottrez, Séverine Humbert, Anne‐Sophie Gay, Elodie Devers, Frédéric De Geuser, Christèle Legens, Xavier Carrier, Alexandra Chaumonnot   +7 more
wiley   +1 more source

𝑁𝜃-Ward Continuity

Abstract and Applied Analysis, 2012
A function 𝑓 is continuous if and only if 𝑓 preserves convergent sequences; that is, (𝑓(𝛼𝑛)) is a convergent sequence whenever (𝛼𝑛) is convergent. The concept of 𝑁𝜃-ward continuity is defined in the sense that a function 𝑓 is 𝑁𝜃-ward continuous if it ...
Huseyin Cakalli
doaj   +1 more source