5 research outputs found
A novel approach to fractional calculus: utilizing fractional integrals and derivatives of the Dirac delta function
While the definition of a fractional integral may be codified by Riemann and
Liouville, an agreed-upon fractional derivative has eluded discovery for many
years. This is likely a result of integral definitions including numerous
constants of integration in their results. An elimination of constants of
integration opens the door to an operator that reconciles all known fractional
derivatives and shows surprising results in areas unobserved before, including
the appearance of the Riemann Zeta Function and fractional Laplace and Fourier
Transforms. A new class of functions, known as Zero Functions and closely
related to the Dirac Delta Function, are necessary for one to perform
elementary operations of functions without using constants. The operator also
allows for a generalization of the Volterra integral equation, and provides a
method of solving for Riemann's "complimentary" function introduced during his
research on fractional derivatives
Palladium(II) Complexes with Anionic N‑Heterocyclic Carbene–Borate Ligands as Catalysts for the Amination of Aryl Halides
A series of (allyl)ÂpalladiumÂ(II)
complexes of anionic N-heterocyclic
carbenes that contain a weakly coordinating borate moiety (WCA-NHC)
were prepared by deprotonation of the carbene IPr with <i>n</i>-butyllithium in the 4-position, which was followed by addition of
BÂ(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub> and reaction of the resulting
lithium carbene–borate with [(η<sup>3</sup>-allyl)ÂPdÂ(ÎĽ-Cl)]<sub>2</sub> (allyl = 2-propenyl, 2-butenyl, 2-methyl-2-propenyl, 1-phenyl-2-propenyl).
In polar solvents such as tetrahydrofuran, chloropalladate complexes
of the type [LiÂ(THF)<sub>3</sub>]Â[(WCA-NHC)ÂPdClÂ(η<sup>3</sup>-allyl)] were formed, whereas the reactions in toluene afforded
neutral complexes of the type [(WCA-NHC)ÂPdÂ(η<sup>3</sup>-allyl)],
which exhibit an intramolecular interaction with the N-aryl groups
of the carbene ligands. The allyl-palladium complexes were employed
as catalysts for the Buchwald–Hartwig amination of various
aryl halides with morpholine
Additional file 2: Table S1. of Association between Taenia solium infection and HIV/AIDS in northern Tanzania: a matched cross sectional-study
Clinical data, data on hygiene and eating habits, medication, family history and diagnostic data of TSOL+ individuals (n = 10) of the initially recruited study population. (DOC 74 kb
Additional file 1: of Association between Taenia solium infection and HIV/AIDS in northern Tanzania: a matched cross sectional-study
Multilingual abstracts in the six official working languages of the United Nations. (PDF 837 kb