Results 61 to 70 of about 140,623 (308)

Pd(II)‐Catalyzed Strategies for the β‐Arylation of α‐Amino Acids: An Overview

open access: yesChemistry – A European Journal, EarlyView.
The graphical abstract summarizes the review “Pd(II)‐Catalyzed Strategies for the β‐Arylation of α‐Amino Acids: An Overview”, highlighting representative Pd(II)‐catalyzed methods for the β‐arylation of α‐amino acids. Key mechanistic features, substrate diversity, and synthetic relevance of these transformations are showcased. Abstract Metal‐catalyzed C─
Davide Illuminati   +4 more
wiley   +1 more source

Two particles with zero-range interaction in a magnetic field

open access: yesPhysics Letters B, 2021
Energy levels are investigated for two charged particles possessing an attractive, momentum-independent, zero-range interaction in a uniform magnetic field.
Johannes Kirscher, Brian C. Tiburzi
doaj   +1 more source

Combinatorial Applications of the Subspace Theorem

open access: yes, 2013
The Subspace Theorem is a powerful tool in number theory. It has appeared in various forms and been adapted and improved over time. It's applications include diophantine approximation, results about integral points on algebraic curves and the ...
Schwartz, Ryan, Solymosi, Jozsef
core   +1 more source

Construction of Phospholipid‐Like Vesicles by Aqueous Aminolysis of Acyl Thioesters With Diamino Acids

open access: yesChemistry – A European Journal, EarlyView.
Membrane‐forming phospholipids are produced in cells via enzymatic diacylation. Here, we show that direct aminolysis of acyl thioesters with diamino acids in aqueous environments enables the synthesis of diacylated amino acids (DAAAs), which spontaneously self‐assemble into robust phospholipid‐like vesicles across a broad range of pH and temperature ...
Federica A. Souto‐Trinei   +2 more
wiley   +1 more source

Semiconjugacies, pinched Cantor bouquets and hyperbolic orbifolds

open access: yes, 2009
Let f be a transcendental entire map that is subhyperbolic, i.e., the intersection of the Fatou set F(f) and the postsingular set P(f) is compact and the intersection of the Julia set J(f) and P(f) is finite.
Mihaljevic-Brandt, Helena
core   +1 more source

Synthetic Studies towards Darobactin A

open access: yesChemistry – A European Journal, EarlyView.
The urgent need for new antibiotics led us to develop a new methodology for the synthesis of the natural product darobactin A selectively targeting gram‐negative bacteria. This study provides new insights into the synthesis of strained indole‐containing macrocycles.
Till Steiner   +4 more
wiley   +1 more source

Diophantine approximation by conjugate algebraic integers

open access: yes, 2003
Building on work of Davenport and Schmidt, we mainly prove two results. The first one is a version of Gel'fond's transcendence criterion which provides a sufficient condition for a complex or $p$-adic number $\xi$ to be algebraic in terms of the ...
Roy, Damien, Waldschmidt, Michel
core   +1 more source

Rational Design Strategies for Stimuli‐Responsive DNAzymes Using Modified and Artificial Nucleotides

open access: yesChemistry – A European Journal, EarlyView.
Activity control of RNA‐cleaving DNAzymes in response to external stimuli has attracted growing interest for applications in DNA‐based diagnostics, therapeutics, and dynamic DNA nanotechnology. This review summarizes rational design strategies for stimuli‐responsive DNAzymes using modified or artificial nucleotides, including split and caged DNAzymes ...
Yusuke Takezawa, Mitsuhiko Shionoya
wiley   +1 more source

Multiplicative processes as a source of fat-tail distributions

open access: yesHeliyon, 2020
Many works in the literature are in favour of the universality of power-laws. However, more recently, a significant amount of research has exposed more subtle details about this subject.
Fabio G. Guerrero, Angel Garcia-Baños
doaj   +1 more source

Scale, Skill‐Mix, and Access Implications of the Production of Appointments by Primary Care Practices in England

open access: yesHealth Economics, EarlyView.
ABSTRACT Primary medical care has traditionally been provided by small organisations. Recent policy developments in many countries have encouraged larger practices in the hope of benefiting from increasing returns to scale, but there is little research evidence to support this.
Tianchang Zhao   +2 more
wiley   +1 more source

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