Results 91 to 100 of about 1,191,147 (335)

Photoinduced ultrafast dynamics and control of chemical reactions: from quantum to classical dynamics [PDF]

open access: yesBunsen Magazin 1, 13 - 23 (2012), 2020
This perspective on laser control provides a quick overview over different schemes for coherent control of chemical reactions and photophysical processes. It originally appeared in Bunsen Magazin 1, 13 - 23 (2012).
arxiv  

Matrigel inhibits elongation and drives endoderm differentiation in aggregates of mouse embryonic stem cells

open access: yesFEBS Open Bio, EarlyView.
Stem cell‐based embryo models (SCBEMs) are valuable to study early developmental milestones. Matrigel, a basement membrane matrix, is a critical substrate used in various SCBEM protocols, but its role in driving stem cell lineage commitment is not clearly defined.
Atoosa Amel   +3 more
wiley   +1 more source

Physics-chemical properties of water and its natural formation

open access: yesRUDN Journal of Engineering Research, 2013
Were analyzed and compared with each other existing theoretical models of water. In detail the features of the structure of molecules and composition of water for the development of effective methods for the separation of water-soluble gases.
A E Vorobiev   +3 more
doaj  

Structure and bonding of second-row hydrides [PDF]

open access: yesarXiv, 2014
The atomic orbitals, hybridization and chemical bonding of the most common hydrides of boron, carbon, nitrogen and oxygen are described. This can be very instructive for beginning students in chemistry and chemical physics.
arxiv  

Quantum Matter-Photonics Framework: Analyses of Chemical Conversion Processes [PDF]

open access: yesarXiv, 2014
A quantum Matter-Photonics framework is adapted to help scrutinize chemical reaction mechanisms and used to explore a process mapped from chemical tree topological model. The chemical concept of bond knitting/breaking is reformulated via partitioned base sets leading to an abstract and general quantum presentation.
arxiv  

Antiprotonic helium atomcules

open access: yesEPJ Web of Conferences, 2012
About 3% of antiprotons () stopped in helium are long-lived with microsecond lifetimes, against picoseconds in all other materials. This unusual longevity has been ascribed to the trapping of on metastable bound states in He+ helium atom-molecules thus ...
Sauge Sébastien
doaj   +1 more source

Does dose calculation algorithm affect the dosimetric accuracy of synthetic CT for MR‐only radiotherapy planning in brain tumors?

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study compares the dosimetric accuracy of deep‐learning‐based MR synthetic CT (sCT) in brain radiotherapy between the Analytical Anisotropic Algorithm (AAA) and AcurosXB (AXB). Additionally, it proposes a novel metric to predict the dosimetric accuracy of sCT for individual post‐surgical brain cases.
Jeffrey C. F. Lui   +3 more
wiley   +1 more source

A Unified Theory of Chemical Reactions [PDF]

open access: yesarXiv, 2014
We propose a new and general formalism for elementary chemical reactions where quantum electronic variables are used as reaction coordinates. This formalism is in principle applicable to all kinds of chemical reactions ionic or covalent. Our theory reveals the existence of an intermediate situation between ionic and covalent which may be almost ...
arxiv  

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