Results 141 to 150 of about 35,208 (291)

Generalized Balancing and Balancing-Lucas numbers

open access: yesProyecciones (Antofagasta)
In this paper, we introduce a generalization of Balancing and Balancing-Lucas numbers. We describe some of their properties also we give the related matrix representation and divisibility properties.
Al-Zoubi, Hasan, Al-Kateeb, Ala'a
openaire   +3 more sources

Power sums of Fibonacci and Lucas numbers

open access: yes, 2011
Polynomial representation formulae for power sums of the extended Fibonacci-Lucas numbers are established, which include, as special cases, four for-mulae for odd power sums of Melham type on Fibonacci and Lucas numbers, obtained recently by Ozeki and ...
LI N. N., CHU, Wenchang, Li, Nadia N
core  

On Jacobsthal and Jacobsthal-Lucas hybrid numbers

open access: yes, 2018
The hybrid numbers are generalization of complex, hyperbolic and dual numbers. In this paper we consider special kinds of hybrid numbers, namely the Jacobsthal and the Jacobsthal-Lucas hybrid numbers and we give some their ...
Szynal-Liana, Anetta, Włoch, Iwona
core  

Sulfur‐Directed Construction of Vinyl Cyclopropanes from 1,3‐Dienes

open access: yesAngewandte Chemie International Edition, EarlyView.
Sulfur takes control. A pending thioether acts as a molecular compass, directing carbene addition to the 1,3‐diene scaffold with exceptional regio‑ and diastereocontrol to forge sulfur‐substituted vinyl cyclopropanes (S‐VCPs) — molecular architectures inaccessible via conventional cyclopropanation strategies.
Anna Keimer   +6 more
wiley   +1 more source

Late‐Stage Functionalization of Peptides on the Solid Phase

open access: yesAngewandte Chemie International Edition, EarlyView.
Peptide modifications are essential to control pharmacodynamic and pharmacokinetic properties of peptide drugs. Consequently, strategies that allow for efficient and rapid incorporation of non‐canonical modifications into peptides in parallel formats are highly sought after.
Marius Werner   +2 more
wiley   +1 more source

Divisibility properties of Fibonacci and Lucas numbers

open access: yes, 2009
Bu çalışma beş bölümden oluşmaktadır. Birinci bölümde; konuya ait literatür özeti verilmiştir, ikinci bölümde; tam sayılarda bölünebilme özelikleri verilmiştir. Üçüncü bölümde Fibonacci ve Lucas sayıları ve temel özelikleri verilmiştir.
Toy, Memnune
core  

Spatial Evolution of Coke in ZSM‐5 Catalysts During Methanol‐to‐Hydrocarbons Conversion Revealed by In Situ X‐Ray Photoelectron Spectroscopy

open access: yesAngewandte Chemie International Edition, EarlyView.
Coking is the central source of deactivation of zeolite catalysts. Using in situ XPS along with complementary methods, we identify differences in the formation kinetics and composition of surface coke on industrially relevant ZSM‐5 catalysts during MTH conversion, demonstrating the strong potential of this technique for studying catalyst deactivation ...
Luca Artiglia   +6 more
wiley   +1 more source

The Effects of Enzyme Pretreatment Extraction on Lipid Recovery With Normal Phase HPLC

open access: yesJournal of the American Oil Chemists' Society, EarlyView.
ABSTRACT With the increasing interest in the commercialization of microalgal fermentation‐based products, sustainable and efficient oil extraction methods have been developed for manufacturing and analytical testing. Due to the variability and resilience of micro‐algae cell walls, traditional lipid extraction methods such as Folch and Bligh and Dyer ...
Zhehan Jiang   +4 more
wiley   +1 more source

Sustainable Palm Oil Extraction and Trends in the Use of Green Technologies: State‐of‐the‐Art and Future Directions

open access: yesJournal of the American Oil Chemists' Society, EarlyView.
ABSTRACT Palm oil, which is extracted from the mesocarp of the fruit of the Elaeis guineensis Jacq. palm tree, is the most widely produced vegetable oil in the world. The extraction of this substance typically utilizes the conventional pressing method, a technique that is advantageous due to its low operating cost and simplified process.
Constantino Lucas Queta   +2 more
wiley   +1 more source

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