Search results for "AIRS"

B-DNA Structure and Stability as Function of Nucleic Acid Composition. Dispersion-Corrected DFT Study of Dinucleoside-Monophosphate Single and Double…

2013

actions of the sugar-phosphate skeleton with water; (6) hydrophobic interactions of the DNA cylindrical core, made up by the hydrogen-bonded and stacked nitrogen bases, with the water solvent. Recently, there has been increasing effort in developing and applying quantum chemical methods able to reproduce the structure of native B-DNA and to correctly describe the energy involved in the intrastrand and interstrand noncovalent interactions between the nucleotide monomers. This topic has been approached by both wave function methods and density functional theory. [2] Water solvent and sodium counterions also play an important role in the formation and relative stabilization of the double-helic…

Rate constants for ion-pair dissociation and association in the anionic two-state polymerization of styrene in THF

1965

Nickel as a Lewis Base in a T‐Shaped Nickel(0) Germylene Complex Incorporating a Flexible Bis(NHC) Ligand

2018

Flexible, chelating bis(NHC) ligand 2, able to accommodate both cis- and trans-coordination modes, was used to synthesize (2)Ni(η 2 -cod), 3. In reaction with GeCl2, this produced (2)NiGeCl2, 4, featuring a T-shaped Ni(0) and a pyramidal Ge center. Complex 4 could also be prepared from [(2)GeCl]Cl, 5, and Ni(cod)2, in a reaction that formally involved Ni-Ge transmetalation, followed by coordination of the extruded GeCl2 moiety to Ni. A computational analysis showed that 4 possesses considerable multiconfigurational character and the Ni→Ge bond is formed through σ-donation from the Ni 4s, 4p, and 3d orbitals to Ge. (NHC)2Ni(cod) complexes 9 and 10, as well as (NHC)2GeCl2 derivative 11, incor…

Robida et la conquête du futur par les airs

2014

International audience

Non-voluntary unemployment in circuit analyses

1994

Studying unemployment is generally done in terms of market. In this type of analysis is not, however, easy to show compulsory redundancy. Furthermore, it's nowadays difficult to deny the existence of this kind of underemployment. According to the Keynesian theory it seems interesting to consider the analysis in terms of circulation. In this respect three outlines are in confrontation. If we accredit the idea of the building up of capital, compulsory redundancy could be explained by a deficit in the flow. Unfortunately, from a macroeconomic point of view this explanation cannot be accepted; if a product is not bought spontaneously, the sale of the product is implemented by force. The analysi…

Journey to the Centre of Europe

1998

De nombreuses institutions locales utilisent, dans de véritables opérations de marketing territorial, une analogie entre centre géographique et centre géométrique du cercle pour valoriser leur localisation. Il s'agit là d'une conception particulière et étroite d'une idée plus riche et plus insaisissable. Le concept de centre est une construction économique et sociale mais il repose sur certains principes consensuels : l'accessibilité, la concentration,l'inégalité, la relativité spatiale et temporelle et la subjectivité compte tenu de sa dimension symbolique. Définir un centre c'est d'abord borner un sous espace de référence. Représenter le centre économique par le centre d'un cercle nécessi…

Reproducing pairs of measurable functions

2017

We analyze the notion of reproducing pair of weakly measurable functions, which generalizes that of continuous frame. We show, in particular, that each reproducing pair generates two Hilbert spaces, conjugate dual to each other. Several examples, both discrete and continuous, are presented.

Direct observation of a borane–silane complex involved in frustrated Lewis-pair-mediated hydrosilylations

2014

Perfluorarylborane Lewis acids catalyse the addition of silicon–hydrogen bonds across C=C, C=N and C=O double bonds. This ‘metal-free’ hydrosilylation has been proposed to occur via borane activation of the silane Si–H bond, rather than through classical Lewis acid/base adducts with the substrate. However, the key borane/silane adduct had not been observed experimentally. Here it is shown that the strongly Lewis acidic, antiaromatic 1,2,3-tris(pentafluorophenyl)-4,5,6,7-tetrafluoro-1-boraindene forms an observable, isolable adduct with ​triethylsilane. The equilibrium for adduct formation was studied quantitatively through variable-temperature NMR spectroscopic investigations. The interacti…

Ikääntyvien opiskelu ja koulutus

1994

Right up to the present, study by the elderly has focused mainly on general adult education. Consequently, marginalisation in this area has been particularly harmful to this section of the population, the people who have received the least education in our society. The motives and points of departure concerning the elderly have not yet been clearly formulated in adult education. This state of affairs is exemplified by the facts that adult education policy statements almost entirely by-pass the issue of education for the elderly and that an educational policy aimed at the elderly simply does not exist. The elderly can no longer be expected to be satisfied with mere activities for the sake of…

EXPLORING THE OBSTACLES OF LATVIAN FOOD COMPANIES EXPORT TO CHINA

2016

As we know, China is the biggest trader in the world. European Commission has revealed that China has become the European Union (EU)`s second largest trading partner behind the United States, and EU is China`s biggest trading partner. This situation just proves the necessity of making good partnership with China, which is especially needed for such a small country as Latvia. The main export fields for Latvia are wood, metal, electrical devices and minerals. As the population of China is growing very fast, leading to more than one billion people in 2016 (increased for more than 41 million in last six years), the food market is in need of more and more products. Of course, Chinese market may …