Search results for "Oct"
showing 10 items of 3052 documents
Entornos educativos de complicidad en el proceso del proyecto Second Round
2019
INTRODUCCIÓ. La relació que s’estableix entre estudiant i docent durant el procés de realització de la tesi doctoral sol estar molt impregnada per les línies de treball pròpies del grup de recerca al qual pertanyen. De vegades, però, es donen circumstàncies una mica particulars, vivències que converteixen aquesta relació en un camp d’experiències vinculades al diàleg que va encaixant amb les fases de la tesi. La confiança entre els dos participants es renova en cada pas de la complicitat assumida. MÈTODE. Presentem un estudi de cas d’una activitat que hem viscut conjuntament, ja que el tema de la tesi de la doctoranda (el projecte Second Round) és, precisament, una activitat d’innovació edu…
Primo Levi, a critic humanist
2015
La intención de este escrito es reflexionar sobre el pensamiento del italiano Primo Levi y defender como apropiado el referirnos a él como un ‘humanista crítico’. Para ello seguimos los criterios propuestos por T. Todorov para caracterizar la doctrina humanista en tres elementos: autonomía del yo, finalidad del tú y universalidad de los ellos, y los propios del humanismo crítico, único posible tras lo ocurrido en Auschwitz y Kolyma: el reconocimiento del horror del que somos capaces los seres humanos y la afirmación de la posibilidad del bien. Palabras-clave: Humanismo crítico, Campos de concentración, Sobreviviente,Testimonio, Memoria. The aim of this research is to reflect upon the though…
CCDC 125321: Experimental Crystal Structure Determination
1996
Related Article: J.Faus, F.Lloret, M.Julve, J.M.Clemente-Juan, M.C.Munoz, X.Solans, M.Font-Bardia|1996|Angew.Chem.,Int.Ed.|35|1485|doi:10.1002/anie.199614851
Synthesis, crystal structure, spectroscopic characterisation and magnetic properties of [Cu2(BIBM)2(C2O4)2]·4H2O (BIBM=bis(2-imidazolyl)bis(methoxyca…
2001
Abstract The structure and spectroscopic and magnetic properties of bis(μ-1,2,3-oxalato)bis[bis(2-imidazolyl)bis(methoxycarbonyl)methylmethane]dicopper(II) tetrahydrate are described. The compound is built of centrosymmetric neutral dimeric [Cu2(BIBM)2(C2O4)2] entities linked through hydrogen bonds involving water molecules and oxalate groups. In the dimeric unit the two centrosymmetrically related copper — which are involved in CuN2O2O2′ chromophores lying in an elongated octahedral environment — are bridged through the oxalate group which acts in a bidentate–monodentate (μ-1,2,3) fashion. Both electronic and EPR spectra are indicative of an essentially dx2−y2 ground state for the copper(I…
Tris(1,10-phenanthroline)zinc(II) dichromate tetrahydrate
2002
The title compound, [Zn(C12H8N2)3][Cr2O7]·4H2O, was obtained by mixing 1,10-phenanthroline (phen), potassium chromate and zinc sulfate solutions. The asymmetric unit is composed of a [Zn(phen)3]2+ cation, a Cr2O72− anion and four water molecules. The ZnII ion is in a distorted octahedral environment, coordinated by six N atoms from three phen molecules. The cations are connected to anions by weak C—H⋯O hydrogen bonds, with shortest H⋯O distances of ca 2.27–2.33 A. The Cr2O72− anion is in a staggered conformation. Two of the four crystallographically independent water molecules are ordered, and two others are disordered, each over two sites.
Thermal properties of the tetrahydrate series MtM(M'EDTA)2·4H2O {Mt, M, M' = Co(II), Ni(II), Zn(II)}
1992
Abstract We report on the specific heat data of the ordered bimetallic compounds CoCo(CoEDTA) 2 ·4H 2 O and CoCo(NiEDTA) 2 ·4H 2 O in the temperature range 1.5−15 K. The magnetic specific heat is analyzed from an Ising model that assumes three different magnetic sublattices exchange-coupled by two distinct magnetic interactions, as well as local anisotropies on tetrahedral Co and octahedral Ni sites.
CCDC 218498: Experimental Crystal Structure Determination
2003
Related Article: M.Makinen, P.Vainiotalo, M.Nissinen, K.Rissanen|2003|J.Am.Soc.Mass.Spectrom.|14|143|doi:10.1016/S1044-0305(02)00863-2
Organotin(IV) azido and mixed azidothiocyanato complex anions; A Mössbauer and vibrational spectroscopic study
1975
Abstract Tetraphenylarsonium and tetramethylammonium salts of the complex anions Ph 3 Sn(N 3 ) − 2 , Ph 3 Sn(N 3 )(NCS) − , Me 2 Sn(N 3 ) 2− 4 and Ph 2 Sn(N 3 ) 2 (NCS) 2− 2 have been synthesized, and the solid state configuration of the complex anions has been studied by Mossbauer and vibrational spectroscopies. Trigonal bipyramidal structures are advanced for the Ph 3 Sn IV derivatives, with equatorial SnC 3 and apical pseudohalide ligands, while the R 2 Sn IV compounds are assumed to be trans -octahedral species. The NCS − ligands are observed to be N-bonded to Sn IV . Conductance and PMR (for the Me 2 Sn IV compound) data suggest the presence of the complex anions also in solution phase…
Potentiometric study of the formation of hydroxo complexes of [Cu(terpy)]2+. Synthesis and crystal structure of [Cu(terpy) (H2O)](CF3SO3)2
1992
Two complexes of formula [Cu(terpy)(H2O)](CF3SO3)2 (1) and [Cu(terpy)(OH)]BPh4 (2) (terpy=2,2′∶6′,2″-terpyridine and BPh4=tetraphenylborate anion) have been synthesized and characterized by spectroscopic techniques. The x-ray crystal structure of (1) has been determined by x-ray diffraction. The structure is made up of [Cu(terpy)(H2O)]2+ mononuclear cations plus semi-coordinated CF3SO3 − anions. The coordination geometry around the copper atom is approximately elongated tetragonal octahedral. The oxygen atom of water and the three nitrogen atoms of terpy occupy the equatorial sites whereas the apical ones are filled by trifluoromethanesulphonate oxygen atoms. The formation of hydroxo comple…
Essential oil compositions of Teucrium fruticans, T. scordium subsp. scordioides and T. siculum growing in Sicily and Malta
2020
In the present study, the chemical composition of the essential oils from the aerial parts of Teucrium fruticans L. collected in Sicily and Malta, Teucrium scordium subsp. scordioides (Schreb.) Arcang. and Teucrium siculum (Raf.) Guss., collected in Sicily, were evaluated by GC-MS. The main volatile components of both T. fruticans collections were germacrene D (29.4% and 50.0%), (E)-β-caryophyllene (19.6% and 21.9%), and 1-octen-3-ol (19.7% and 7.4%); T. scordium subsp. scordioides essential oil was rich in caryophyllene oxide (25.8%), α-pinene (19.4%) and β-pinene (8.5%); T. siculum essential oil was rich in (E)-β-caryophyllene (30.9%), 1-octen-3-ol (9.0%), α-humulene (8.6%) and germacrene…