Search results for "structure analysi"

Diorganotin(IV) complexes ofD-galacturonic acid: solid-state and solution-phase structural study

2003

Three diorganotin(IV) complexes of D-galacturonic acid (H2GalA; R = Me, n-Bu, Ph), two of which are new derivatives (R = Me, Ph), have been synthesized and their solid-state and solution-phase investigated by IR, Mossbauer, 1H, 13C and 119Sn NMR spectroscopy. The FTIR data suggest that H2GalA, in the dialkyltin derivatives, behaves as a dianionic ligand, coordinating the tin(IV) atom through an ester-type carboxylate and deprotonated alcoholic hydroxo groups, whereas a bridging carboxylate occurs in the diphenyltin(IV) complex. Octahedral and trigonal bipyramidal local geometries on tin(IV) atoms are proposed for dialkyltin(IV)GalA and diphenyltin(IV)GalA complexes respectively on the basis…

Larval fish assemblages in the central Mediterranean Sea: spatio spatio-temporal dynamics and biological effect on early life stage of Sardinella aur…

Mediadores psicológicos y motivación deportiva en judocas españoles. Psychological mediators and sport motivation in Spanish judokas.

2006

El presente trabajo analizo las diferencias de la motivacion en situacion precompetitiva de judocas en funcion de los mediadores psicologicos (percepciones de competencia, apoyo a la autonomia y relaciones sociales), tal y como postula el Modelo Jerarquico de la Motivacion Intrinseca, Extrinseca y Amotivacion (Vallerand, 1997, 2001; Vallerand y Losier, 1999). Se empleo una muestra de 181 judocas de edades comprendidas entre los 14 y 16 anos. Utilizamos una metodologia selectiva, con diseno prospectivo simple. Los datos se analizaron mediante un MANOVA, tomando como variables independientes los mediadores psicologicos y el sexo de los deportistas y como variables dependientes cada una de las…

Comparison of postoperation bone defects healing of alveolar processes of maxilla and mandible with the use of Bio-Gen and Bio-Oss

2010

Bone defects of mandible and maxilla alveolar processes have often iatrogenic origins, because they appear as a consequence of performed operations. Bone atrophy may be stopped by filling bone defects with augmentative biomaterial directly after an oral surgery procedure. To achieve this aim augmentative biomaterials are used. Many years of experimental studies confirmed xenogenic biomaterials as the most ef fective. The aim of this study was clinical assessment of bone lesions healing with the use of Bio-Gen and Bio-Oss materials. A comparison of radiological imaging of healed defects was performed, as well as histological analysis of biopsies obtained from the defect sites. The structure …

A Validation Study of Classroom Assessment Scoring System-Secondary in the Finnish School Context

2018

This study examined the reliability and validity of the Classroom Assessment Scoring System–Secondary (CLASS-S) in Finnish classrooms. Trained observers coded classroom interactions based on video recordings of 46 Grade 6 classrooms (450 cycles). Concurrent associations were investigated with respect to teacher self-ratings (e.g., efficacy beliefs and teaching-related stress). Confirmatory factor analysis showed that the hypothesized three-factor structure of the original CLASS-S (Emotional Support, Organizational Support, and Instructional Support), with some modifications, provided a better fit for the data compared with one- and two-factor structures. Structural validity was demonstrated…

Combined Use of Structure Analysis, Studies of Molecular Association in Solution, and Molecular Modelling to Understand the Different Propensities of…

2021

The arrangement of hydroxyl groups in the benzene ring has a significant effect on the propensity of dihydroxybenzoic acids (diOHBAs) to form different solid phases when crystallized from solution. All six diOHBAs were categorized into distinctive groups according to the solid phases obtained when crystallized from selected solvents. A combined study using crystal structure and molecule electrostatic potential surface analysis, as well as an exploration of molecular association in solution using spectroscopic methods and molecular dynamics simulations were used to determine the possible mechanism of how the location of the phenolic hydroxyl groups affect the diversity of solid phases formed…