Search results for "Oct"
showing 10 items of 3052 documents
Thermodynamic and spectroscopic study of the binding of dimethyltin(IV) by citrate at 25°C
2006
Thermodynamic (potentiometric and calorimetric) and spectroscopic ( 1 H NMR, 119 Sn Mossbauer) studies were performed in aqueous solution in order to characterize the interaction of dimethyltin(IV) cation with citrate ligand. Six species {(CH 3 ) 2 Sn(cit) - ; [(CH 3 ) 2 Sn] 2 (cit) 2 2- ; (CH 3 ) 2 Sn(cit)H 0 ; (CH 3 ) 2 Sn(cit)OH 2- ; [(CH 3 ) 2 Sn] 2 (cit)OH 0 ; [(CH 3 ) 2 Sn] 2 (cit)(OH) 2 - } were found. All the species formed in this system are quite stable and formation percentages are fairly high. For example, at pH = 7.5 and C (CH3)2Sn = C cit = 10 mmol l -1 , E% for [(CH 3 ) 2 Sn] 2 (cit)(OH) 2 - and (CH 3 ) 2 Sn(cit)OH 2- species reaches 65%. Overall thermodynamic parameters obta…
Octopus, a computational framework for exploring light-driven phenomena and quantum dynamics in extended and finite systems
2020
Over the last few years, extraordinary advances in experimental and theoretical tools have allowed us to monitor and control matter at short time and atomic scales with a high degree of precision. An appealing and challenging route toward engineering materials with tailored properties is to find ways to design or selectively manipulate materials, especially at the quantum level. To this end, having a state-of-the-art ab initio computer simulation tool that enables a reliable and accurate simulation of light-induced changes in the physical and chemical properties of complex systems is of utmost importance. The first principles real-space-based Octopus project was born with that idea in mind,…
Evaluación de los resultados de la Esfinteroplastia Anatómica mediante la reconstrucción combinada del esfínter anal interno y externo en el tratamie…
2021
La esfinteroplastia es utilizada para tratar la incontinencia anal secundaria a un defecto esfinteriano. Esta técnica muestra una efectividad alrededor del 75% a corto plazo, deteriorándose su resultado en el tiempo al 50%. Se han publicado resultados mostrando un 80% de éxito tras introducir la realización de la reparación por separado del esfínter anal interno y externo y viendo que estos resultados se mantenían a largo plazo. Sin embargo, la técnica no se ha extendido y se necesitan más estudios para confirmar estos resultados. Hipótesis y Objetivos: La introducción de modificaciones en la técnica quirúrgica desde una mentalidad anatómica y reconstructiva, que hemos denominado: “Esfinter…
Synthesis and selected properties of metallo and metal-free 2,3,9,10,16,17,23,24-octacarboxyphthalocyanines
2015
This review article reports methods of synthe sis and selected physicochemical properties of metallo and metal-free 2,3,9,10,16,17,23,24–octacarboxyphthalocyanines. The most frequently used methods of synthesis for this class of co mpounds are described in this article. Moreover, aggregation, catalytic and photocatalytic properties of these complexes are presented. Potential applications of metallo and metal-free 2,3,9,10,16,17,23,24–octacarboxyphthalocyanines are also given.
Ubezpieczenia społeczne doktorantów szkół doktorskich
2020
Th e reform of the doctoral student education system, resulting in a departure from conducting third degree studies in favour of doctoral schools, resulted in changes in the fi eld of social security law. Th e status of a doctoral student receiving a doctoral scholarship has become independent grounds for compulsory retirement, disability and accident insurance. At the same time, it is the basis for voluntary sickness insurance. Th e author criticises the granting of doctoral students the right to acquire cover under this type of insurance. Th eir actual situation when receiving a doctoral scholarship is far diff erent from the situation of other persons (grounds) covered by sickness insura…
On the motivations to enroll in doctoral studies in Computer Science — A comparison of PhD program models
2013
While student motivation has been intensively researched, only a few studies cover motivation at doctoral level and even less focus on doctoral education in Computer Science. In this paper we investigate the motivation of graduate students to pursue doctoral studies specifically in Computer Science. We interviewed 63 doctoral students, from two different doctoral models (traditional and structured) in Finland and Austria, on their initial reasons and experiences that led them to enroll in doctoral studies. We identified five disjoint main motivational drivers that relate with different aspects of extrinsic and intrinsic motivation. Together with a measure of the strength of their initial mo…
Estado de la investigación psicológica en España: el grado de doctor y la
2001
El objetivo del presente trabajo es dar a conocer el desarrollo de las tesis doctorales en psicología en los últimos años (1976-1998) en las diferentes universidades españolas. Los datos que presentaremos indican un incremento en la investigación en las diferentes áreas de la psicología específicamente las relacionadas con la psicología clínica y la psicología educativa. Asimismo, se observa el fuerte incremento producido en el número de tesis doctorales a partir de 1990. Éstos y otros análisis son los que presentaremos a lo largo de este trabajo. The aim of present study is to reflect the situation of scientific activity in psychology in the last decades (1976-1998) throught diferents doct…
CCDC 947463: Experimental Crystal Structure Determination
2013
Related Article: Anssi Peuronen, Esa Lehtimäki, and Manu Lahtinen|2013|Cryst.Growth Des.|13|4615|doi:10.1021/cg401246n
CCDC 157094: Experimental Crystal Structure Determination
2001
Related Article: M.Bujak, J.Zaleski|2000|J.Mol.Struct.|555|179|doi:10.1016/S0022-2860(00)00600-1
CCDC 250457: Experimental Crystal Structure Determination
2005
Related Article: L.M.Toma, R.Lescouezec, D.Cangussu, R.Llusar, J.A.Mata, S.Spey, J.A.Thomas, F.Lloret, M.Julve|2005|Inorg.Chem.Commun.|8|382|doi:10.1016/j.inoche.2004.12.031