46 research outputs found
COORDINATION COMPOUNDS OF OXOVANADIUM(IV) BASED ON S-METHYLISOTHIOSEMICARBAZIDE AS DYES FOR THERMOPLASTIC POLYMERS
No full textWe have investigated the properties as dyes of coordination compounds synthesized by us previously (8-(1',2'-naphthyl)-1-R-3-methyl-6-thiomethyl-4,5,7-triazanona-1,3,5,7-tetraenato-1,1'-diolato(-)-O1, O1', N4, N7-vanadil, where R=CH3 (1) , C6H5 (2)), which can be used for colouring thermoplastic masses. The compounds have a high photostability (7 points), thermostability (>250°) and an intensity of colour that give a low consumption (0.006-0.010g)
Utilización de los datos polínicos en sitios arqueológicos de Patagonia: Metodologías estadísticas, alcances y límites interpretativos.
No full textLos sitios arqueológicos presentes en Santa Cruz han brindado importante información sobre los cambios de la vegetación y del clima en diferentes escalas espaciales y temporales. En este trabajo presentamos ejemplos metodológicos para analizar los datos polínicos actuales y del registro fósil de cuatro secuencias arqueológicas (CMN1 y COCU a los 47°S; 71°O y B1Oq y CPD a los 49°S; 72°O) al oeste de Santa Cruz. A partir de estos resultados se discuten los alcances y los límites interpretativos de los datos utilizados. Nuestros resultados indican que los análisis polínicos actuales han diferenciado con significancia estadística las unidades de vegetación a escala local y regional para ambas áreas. Las secuencias estudiadas han permitido estimar la representación espacial de los registros fósiles mediante un análisis de correspondencia destendenciado. CMN1 y CPD reflejan cambios en la vegetación a mesoescala y escala regional verificables con otras secuencias naturales (47°-49º; 50°S), mientras que COCU y B1Oq indican una señal local de la vegetación. Si bien debe considerarse cuidadosamente el alcance de los datos para abordar la pregunta paleoambiental es inherente que las secuencias arqueológicas brindan valiosa información y son muy importantes en aquellos ambientes donde no hay disponibilidad de secuencias naturales continuas. En este trabajo concluimos que los análisis estadísticos son una herramienta importante que complementan nuestros análisis. Además, es necesario conocer las particularidades de las áreas de estudio, la vegetación circundante, su geomorfología, y la representación espacial de los registros actuales y fósiles para reflejar con mayor fidelidad los estudios polínicos.The archaeological sites of Santa Cruz have provided important information about vegetation and climate changes at different spatial and temporal scales. In this paper we present methodological examples to analyze modern pollen and fossil record data of four archaeological sequences (CMN1 and COCU, at 47 ° S, 71 ° W and B1Oq and CPD at 49 ° S, 72 ° W) west of Santa Cruz. Based on these results, we discussed the scopes and interpretative limits of the data used. Our results indicate that the vegetation units were differed with statistical significance at local and regional scales for both areas. The studied sequences have allowed us to estimate the spatial representation of the fossil record through a Detrended Correspondence Analysis. CMN1 and CPD reflect vegetation changes at mesoscale verifiable with other natural sequences (47 ° - 49 ° S and 50 ° S), while COCU and B1Oq indicate a local vegetation signal. While should consider carefully the data scope to address the palaeoenvironmental question, that archaeological sequences provide valuable information and are very important in those environments where continuous natural sequences are not available. In this article, we conclude that statistical analysis are an important tool that complements our analyzes. Also, it is necessary to know the study areas particularities, the surrounding vegetation, its geomorphology and the spatial representation of modern and fossil records to reflect with high fidelity the pollen studies.Fil: Marcos, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Bamonte, Florencia Paula. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Mancini, Maria Virginia. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentin
COORDINATION COMPOUNDS OF NICKEL(II), COPPER(II) AND COBALT(II) BASED ON S-METHYLISOTHIOSEMICARBAZIDE AS DYES FOR THERMOPLASTIC POLYMERS
No full textWe have researched the color properties of coordination compounds synthesized by us previously [1] (8-(1',2'-naphthyl)-1-
R3-methyl-6-thiomethyl-4,5,7-triazaocta-1,3,5,7-tetraenato-1,1'-diolato(-)O, O', N4, N7-M(II), where R=CH3, C6H5, M=Ni,
Co, Cu), which can be used for coloring thermoplastic masses. They meet the requirements for use as a pigment for coloring
thermoplastic masses
SINTEZA ȘI STUDIUL LIGANZILOR ȘI COMPUSULUI COORDINATIV AL OXOVANADIULUI(IV) ÎN BAZA HIDRAZIDEI ACIDULUI IZONICOTINIC ȘI S-METILTIOSEMICARBAZIDEI
No full textAu fost sintetizați doi liganzi: izonicotinoilhidrazona 1-fenil-1,3-butandionei (L1 ) și S-metiltiosemicarbazona o-vanilinei (L2 ) și un compus coordinativ al oxovanadiului IV [VOL1 (OCH3)]2 și investigați cu spectroscopia RMN 1H și 13C RMN, spectrometria de masă EI și difracția cu raze X
Coordination Compounds of Oxovanadium(IV) Based on S-Methylisothiosemicarbazide as Dyes for Thermoplastic Polymers
No full textMagnetic interactions in melt spun CoCu system
No full textThe magnetic interaction between Co clusters have been studied for the melt-spun CoxCu1-x systems. Superparamagnetic character of these clusters can be verified by the superimposition of the magnetization versus H/T curves. These curves also allow us to check, by means of the molecular field approximation, that there is an antiferromagnetic like coupling between the single domain Co clusters. This molecular field, which is in fact proportional to the magnetization, could be due to dipole-dipole, as well as to RKKY like, interactions
The Institute of Chemistry at 60 Years Anniversary. Brief History, Achievements and Perspectives
No full textSéquence 14, Affaires de cœur de Manoel, raconté par Jo
No full textCette séquence fait partie du corpus vidéo de Langue des Signes Emergentes utilisé lors de la thèse d'Ivani Fusellier-Souza : le locuteur Jo raconte la dernière histoire amoureuse de Manoël, et le taquine à ce sujet.00:00:00>00:00:05 Jo dit que la copine de Manoël l'a trompée avec quelqu'un autre, et que leur histoire est finie. 00:00:05>00:00:06 Manoël interpelle Jo, qui fait exprès de ne pas lui répondre. 00:00:06>00:00:11 Jo répète que la fille l'a trompée. 00:00:12>00:00:14 Manoël dit qu'avec la fille s'est bien terminé mais qu'elle ne l'a pas trompée. 00:00:14>00:00:18 Jo taquine Manoël sur le fait qu'il est cocu. 00:00:18>00:00:20 Manoël lui demande d'arrêter de le taquiner. 00:00:20>00:00:24 Jo dit que Manoël a eu plusieurs filles avant. 00:00:24>00:00:26 Manoël dit que Jo raconte n'importe quoi. 00:00:26>00:00:38 Jo dit que Manoël joue aux jeux vidéos, et qu'il est cocu
The studies of the natural zeolite - clinoptylolite in reduction of nitrogen
No full textThis article presents the results of the research in the area of the possibilities of the utilization of natural zeolite- clinoptylolite for reduction of oxide nitrogen. The clinoptylolite type zeolite has the unique structure, high resistance against hydrothermal conditions and the ability to form strong acid centers. Various kinds of metals ions were inserted into the samples of zeolite using ion-exchange method. The effect of metals content was shown for clinoptylolite matrix and related to the performance of its pure hydrogen form. A comparison of the catalytic properties of Cu-, Co-, Fe-, Mn- and Ni-CLI was carried out for the NO reduction with methane. A eries of doubly substituted CoCu-CLI catalysts with different metal loading were studied too. Over the copper and cobalt-CLI was observed high nitric oxide conversion, especially at temperatures between 400 and 500°C. It was confirmed that the copper-cobalt-CLI catalysts have higher activity and durability than catalysts composed of iron, nickel and manganese supported on clinoptylolite. Moreover, the iron, nickel and manganese containing catalysts produced more nitrous oxide than nitrogen. The presence of both copper and cobalt species seems to be an indispensable condition for the high activity and selectivity in the NO reduction
A STUDY OF STRUCTURE ORDER OF R(COCU)5 COMPOUNDS
No full textPhysics, AppliedSCI(E)2ARTICLE32082-20835
