Search results for "Fig"
showing 10 items of 1359 documents
The electronic spectra of 2-(2′-hydroxybenzoyl)pyrrole and 2-(2′-methoxybenzoyl)pyrrole: a theoretical study
2005
The gas-phase electronic spectra of 2-(2 0 -hydroxybenzoyl)pyrrole and 2-(2 0 -methoxybenzoyl)pyrrole have been determined using multiconfigurational perturbation theory (CASPT2). Solvatochromic spectral shifts for these molecules have been measured in cyclohexane and methanol and the electrostatic components of these shifts have been estimated using the vertical electrostatic model (VEM 4.2) developed for the configuration interaction with single excitations model implemented with the intermediate neglect of differential overlap Hamiltonian (CIS/INDO/ S2). Comparison between theory and experiment and an interpretation of the main spectral differences between the two substituted pyrroles an…
Thermische Diels-Alder-Reaktionen mitN-(2-Alkenoyl)-(S)-prolinestern als chiralen Dienophilen in organischen und wäßrigen Reaktionsmedien
1990
Thermal Diels-Alder Reactions with N-(2-Alkenoyl)-(S)-proline Esters as Chiral Dienophiles Cyclopentadiene reacts with N-acryloyl-(S)-proline benzyl and allyl ester in toluene at 0°C to give the bicycloheptene-carboxylic acid amides with a stereoselection of (2S):(2R) = 81:19. In the reactions with the N,N′-fumaroylbis(proline esters) the cycloadducts are formed in high yields and with isomer ratios of up to 97:3. The absolute configuration of N,N′-〈(1R,2R,3R,4S)-bicyclo[2.2.1]hept-5-ene-2,3-diyldicarbonyl〉bis-[(S)-proline benzyl ester] (6 a) has been determined by an X-ray analysis. In the reactions of the acrylamides with cyclopentadiene and of the fumaramides with cyclopentadiene, isopre…
Taxonomic and synonymic world catalogue of the Charipinae and notes about this subfamily (Hymenoptera: Cynipoidea: Figitidae)
2012
The Charipinae (Cynipoidea: Figitidae) are a small group of Hymenoptera biologically characterized as being secondary parasitoids of aphids and psyllids (Hemiptera) (Menke & Evenhuis, 1991). A total of 281 species of Charipinae have been described since the first species was described by Westwood (1833) (including two fossils, one of them recently transferred in a new family, Protimaspidae). An updated world catalogue of the Charipinae is presented here, with 168 valid species: 111 included in Alloxysta Förster, 31 in Phaenoglyphis Förster, 13 in Dilyta Förster, 5 in Apocharips Fergusson, 4 in Thoreauana Girault, and 1 in Dilapothor Paretas-Martínez & Pujade-Villar, Lobopterocharip…
Deciliation: A stressful event for Paracentrotus lividus embryos.
1998
In this report, by using mono- and two-dimensional electrophoretic analysis, we demonstrate that deciliation on sea urchin embryos induces a stress response. Deciliation indeed causes not only the activation of ciliary subroutine, but also a transient decrease of bulk protein synthesis. This decrease is in agreement with our previous results on heat shock response in sea urchin, although deciliation does not induce the expression of the same main hsp set. We were able to characterize one main deciliation-stress protein of 40 kDa whose expression is transiently induced by deciliation and whose localisation is likely to be nuclear.
Novel σ1 antagonists designed for tumor therapy: Structure – activity relationships of aminoethyl substituted cyclohexanes
2021
Abstract Depending on the substitution pattern and stereochemistry, 1,3-dioxanes 1 with an aminoethyl moiety in 4-position represent potent σ1 receptor antagonists. In order to increase the stability, a cyclohexane ring first replaced the acetalic 1, 3-dioxane ring of 1. A large set of aminoethyl substituted cyclohexane derivatives was prepared in a six-step synthesis. All enantiomers and diastereomers were separated by chiral HPLC at the stage of the primary alcohol 7, and their absolute configuration was determined by CD spectroscopy. Neither the relative nor the absolute configuration had a large impact on the σ1 affinity. The highest σ1 affinity was found for cis-configured benzylamines…
Evaluation of different InSAR multi-baseline construction methods over a dam in southern Italy
2018
Monitoring dam displacements using different techniques allows an evaluation of their structural behaviour over time. In this study, dam displacements (for the Castello dam, Agrigento, Italy) have been investigated using different Interferometric Synthetic Aperture Radar (InSAR) techniques exploiting a freely available dataset from the EU Copernicus Sentinel-1 SAR built by the European Space Agency (ESA). The dataset includes Sentinel 1A (S1A) images acquired in dual-polarization and Interferometric Wide (IW) swath using the Terrain Observation with Progressive Scans SAR (TOPSAR) mode. Three main Multi-Baseline Construction methods based on the identification of Persistent Scatterers (PS) h…
Figueroles d'Alcalatén. Balls i costums
1999
Figueroles és una població de l'Alcalatén coneguda per una dansa tradicional emparentada amb les danses o dansades meridionals i els balls plans de les comarques septentrionals del País Valencià: el ball de l'Anguila, també conegut com el ball de Figueroles, una dansa que es va ballar per última vegada el dia de Sant Mateu de 1932 abans de la seua recuperació auspiciada pel treball investigador d'Amadeu Porcar, un dels autors d'aquest llibre, a l’any 1980. A més de l'Anguila, el patrimoni corèutic de Figueroles inclou la dansa del Prim, el ball de jota i el ball de plaça. A totes quatre manifestacions dediquen els autors el present estudi amb una petita descripció de la indumentària tradici…
Das Unheimliche (Postcolonialisme et reconfiguration à l'extrême gauche). Autour d'une configuration, à partir de : Race et Capitalisme, Les Cahiers …
2013
International audience; Pourquoi ce titre, emprunté à Sigmund Freud1, pourquoi à propos d'une livraison pour Syllepse d'un numéro des Cahiers de l'émancipation ? Le propos n'est pas une lecture pathologique, mais davantage symptomale, soit une façon – à la manière assumée d'un usage « sauvage » du lexique psychanalytique tel que pratiquée naguère par l'histoire du temps présent – de questionner une part de l'agency 2 de l'extrême gauche française contemporaine, entre stratégie(s) académique(s), reconfiguration(s) politique(s) autour des questions du postcolonialisme, du marxisme et de son efficace politique sur la scène française. Cette livraison offre un dossier « Race et capitalisme » coo…
Proposal of Up-to-Date Standards on Methods of Measuring Noise Parameters of Microwave Transistors
1994
One of the most interesting topics for microrwave community is the characterization of low-noise transistors. After so many years, the Standards suggested by IEEE in 1960 are considered obsolete by the experimenters. A new methodology is here proposed as a standard. To support this proposal, an original measuring system for the complete characterization of microwave transistors in terms of noise, gain and scattering parameters from noise figure measurements only is presented.
Comparison between complete and simplified methods for determining the microwave noise parameters of HEMTs
1994
Modem automatic noise parameter measuring systems are based on measurements of some values of F(rs ) for different values of IГs (more than four, for redundancy) realized by adjusting an admittance transformer (tuner) inserted between the noise source and the TUT mput . Such values are then manipulated by means of proper data processing techniques using eqn.( 1) [ 11. This measuring procedure is hereafter referred to as standard to point out that the old `Standards on methods of measuring noise in linear twoports´ published by the IRE Subcommittee on noise in 1960 is considered obsolete by all the experimenters.