Search results for "GPR"

The CEO-Chair relationship from a relational leadership perspective

2016

Purpose The purpose of this paper is to conceptualise how the chief executive officer (CEO) and chairperson of the board (Chair) construct their relationship through their leadership practices, and to analyse the meaning of these practices to the relationship. An empirical investigation from both partners’ viewpoint is conducted. Design/methodology/approach The data were gathered through in-depth interviews with 16 CEOs and 16 chairpersons from the same companies. Content analysis was used to analyse the data. Findings Four types of leadership practices in the CEO-Chair relationship were conceptualised: emergent practices on company- and person-related issues, and scheduled practices on co…

Job satisfaction and organizational trust as antecedents of organizational commitment in Finnish and Estonian SMEs

2015

This empirical study examines three well-known leadership themes – organizational commitment, job satisfaction and organizational trust – from the perspective of Finnish and Estonian small and medium –sized enterprises (SMEs). The object of the study is to increase knowledge about organizational commitment and job attitudes affecting the formation of commitment. The study is cross-sectional, using previously gathered SME survey data. Organizational commitment is understood as a multidimensional construct. The study is interested especially in its affective component, which is considered to be the deepest form of organizational commitment and usually related to desirable behavioral outcomes.…

Thermodynamics of yeast cell osmoregulation: Passive mechanisms

1996

International audience; The response of yeast cells to osmotic pressure variations of the medium were studied through the kinetics of cell-volume modifications corresponding to the mass transfer of water and solutes. Osmotic variations were made by modification of the concentration of an external binary solution (polyol/water) without nutritive components. Two phases were distinguished in the thermodynamic response. A transient phase following an osmotic shift, which is characterised by rapid water transfer across the cell membrane and whose kinetics determine cell viability; then, a steady-state phase is reached when the cell volume becomes quasi-constant. The response of the cell during t…

Effects of PET packaging on the quality of an orange juice made from concentrate

2004

An orange juice made from concentrate was conditioned in three different PET (PolyEthylene Terephtalate) and glass packagings. Influence of storage conditions (length of storage, light, oxygen) on vitamin C content, browning index, and colour were measured. Results show that permeability to oxygen of PET packagings is the major factor detrimentally affecting the above parameters.

Selectivity improvement of semi-conducting gas sensors by selective filter for atmospheric pollutants detection

2006

International audience; The monitoring of atmospheric pollution using chemical gas sensors is a challenge due to the lack of selectivity of most existing devices. However, their performances can be improved using filtering films achieving the separation or the removal of some gases. This study is focused on the detection of carbon monoxide and of oxidant pollutants (nitrogen dioxide and ozone) by sensors constituted of SnO2, or phthalocyanine compounds. Two types of filters were investigated. Filters based on MnO2 powder are successful to remove ozone while preserving nitrogen dioxide in a large temperature range from ambient to 400 -C, but they partially convert carbon monoxide. The second…

STRATEGIE DI DIREZIONAMENTO ALL’EPATOCARCINOMA DI FARMACI ANTITUMORALI MEDIANTE SISTEMI NANOPARTICELLARI E DI VISUALIZZAZIONE IN CELLULE TUMORALI DEL…

Lo scopo di questo lavoro di tesi è stato quello di realizzare nuovi sistemi nanoparticellari per il direzionamento di farmaci o di agenti per l’imaging, potenzialmente utilizzabili per la terapia e/o per la diagnosi dell’epatocarcinoma (HCC), in particolare per quelle forme caratterizzate dall’overespressione del recettore di membrana degli epatociti ASGP-R o del recettore mitocondriale TSPO. In particolare, nel capitolo 2 sono state descritte la sintesi, la caratterizzazione chimico fisica, la capacità di internalizzazione cellulare e l’efficacia antitumorale di un nuovo sistema nanoparticellare, costituito da un dendrimero a struttura poli-amido-aminica (PAMAM) di quarta generazione, opp…

Identification and quantification of phosphorus in cheeses - methodological investigations by solid-state 31P NMR spectroscopy

2008

International audience; NMR has been shown to be an interesting tool for investigating dairy foods, in particular cheese products, for which the method is non-destructive and well suited for investigating their compounds showing different structure and mobility during ripening. Solid-state magic angle spinning 31P NMR spectroscopy was used to characterize the structure and composition of semi-hard cheeses. Assignment including overlapping resonances from mobile/immobile phosphorylated serine residues and inorganic calcium phosphates, has been realised using different NMR techniques (spin echo, cross polarisation and single pulse excitation) and by comparison with spectra of literature. Stud…

Quantitative structure-property relationships approach of aroma compounds behaviour in polysaccharide gels

2010

International audience; Pectin and carrageenan are common used thickeners in fat free foods. The aim of this work was to study separately and to compare their respective effects on the aroma release, in order to investigate the nature of involved interactions. In this way, we studied the influence of the chemical structure of 13 aroma compounds on retention/release equilibrium between vapour phase and gels using QSPR tools. Six descriptors are involved in the best obtained QSPR equations, and three of them appeared to play a critical role in the behaviour of aroma compound. Our results put forward the role of polar effects on the retention of odorant molecules in both iota-carrageenan and p…

La formation des préférences alimentaires

2005

Chapitre 21; National audience

Exposure to different regimens of food variety influences the acceptance of new flavours by weanling infants

2005

International audience