Search results for "fluidit"

Évaluation de la fluidité de la membrane plasmique avec la sonde fluorescente di-4-ANEPPDHQ: Adaptation de la technique de recouvrement de fluorescen…

2011

National audience; Au cours de l’interaction entre plantes et microorganismes, la membrane plasmique joue un rôle essentiel dans l’organisation précoce des mécanismes de réactions de défense mises en place par la plante. L’équipe Dynamique membranaire et réponse aux stress biotiques, de l’UMR Plante-Microbe-Environnement, s’intéresse aux modifications des propriétés du plasmalemme des cellules végétales dans ce type d’interactions. La fluidité membranaire est une de ces propriétés. La technique de retour de fluorescence après photoblanchiment (FRAP), réalisée à l’aide d’un microscope confocal à balayage laser, a été adaptée à l’étude des variations de la fluidité de la membrane plasmique de…

Erythrocyte rheology in diabetes mellitus and hypertension

2009

Pensiero e autocoscienza. Lo strano anello della cognizione umana.

L’argomento centrale della tesi è la natura della mente umana in relazione alla questione dell’intricato rapporto fra pensiero e autocoscienza. La congettura fondamentale consiste, in primo luogo, nel sostenere che particolari proprietà del pensiero umano, la flessibilità e la fluidità, rappresentino le caratteristiche salienti e specifiche della cognizione umana e, in secondo luogo, nel rilevare che il costituirsi di queste ultime sia strettamente connesso al fenomeno di autocoscienza. Il fuoco dell’analisi ruota attorno a tre importanti nuclei tematici: cosa si intende per flessibilità e fluidità della mente? Cosa si intende per autocoscienza – o meglio – quale tipo di autocoscienza esatt…

Macro e microreologia eritrocitaria nella malattia diabetica e ipertensiva

2008

Hong Kong Palermo Fluid Cities

2017

L'articolo affronta il concetto di "fluidità" a partire dall'esperienza dell'International Workshop on Urbanism and Design che si è svolto da gennaio a marzo 2017 a Palermo: circa 80 studenti hanno sperimentato una metodologia di lavoro di collaborative urbanism and design sotto la responsabilità scientifica di Maurizio Carta e Dario Russo (Università di Palermo) e di Manuela Catania e Ero Pagla (Raffles Design Institute di Hong Kong).

Nitrated Fatty Acids Modulate the Physical Properties of Model Membranes and the Structure of Transmembrane Proteins

2017

Nitrated fatty acids (NO2 -FAs) act as anti-inflammatory signal mediators, albeit the molecular mechanisms behind NO2 -FAs' influence on diverse metabolic and signaling pathways in inflamed tissues are essentially elusive. Here, we combine fluorescence measurements with surface-specific sum frequency generation vibrational spectroscopy and coarse-grained computer simulations to demonstrate that NO2 -FAs alter lipid organization by accumulation at the membrane-water interface. As the function of membrane proteins strongly depends on both, protein structure as well as membrane properties, we consecutively follow the structural dynamics of an integral membrane protein in presence of NO2 -FAs. …

Localization and dimension estimation of attractors in the Glukhovsky-Dolzhansky system

2016

Rhombi-chain Bose-Hubbard model: Geometric frustration and interactions

2018

We explore the effects of geometric frustration within a one-dimensional Bose-Hubbard model using a chain of rhombi subject to a magnetic flux. The competition of tunnelling, self-interaction and magnetic flux gives rise to the emergence of a pair-superfluid (pair-Luttinger liquid) phase besides the more conventional Mott-insulator and superfluid (Luttinger liquid) phases. We compute the complete phase diagram of the model by identifying characteristic properties of the pair-Luttinger liquid phase such as pair correlation functions and structure factors and find that the pair-Luttinger liquid phase is very sensitive to changes away from perfect frustration (half-flux). We provide some propo…

Type II diabetics with macrovascular complications: polymorphonuclear leukocyte (PMN) filtration, PMN membrane fluidity and cytosolic Ca2+ content af…

1998

We evaluated polymorphonuclear (PMN) filtration parameters, membrane fluidity and cytosolic Ca2+ content in 21 normal subjects and in 18 type II diabetics with macrovascular complications (MVC). Evaluations were carried out at baseline and after in vitro activation prolonged for 5 and 15 min. PMA (4-phorbol 12-myristate 13-acetate) and fMLP (N-formyl-methionyl-leucyl-phenylalanine) were used as stimulating agents. TMA-DPH (1-[4-(trimethylamino)phenyl]-6-phenyl-1,3,5-hexatriene) was used as fluorescent probe for the membrane fluidity tests and Fura 2-AM for the cytosolic Ca2+ content. A significant variation was evident in PMN filtration parameters at 5 and 15 min. No variation was present i…

Rheological and metabolic leucocyte determinants in diabetes mellitus

1995

In diabetics of type I and 2 we examined, in resting white blood cells (WBC), the filtration parameters (Initial Relative Flow Rate - lRFR, Clogging Rate - CR) employing the St. George Filtrometer, the polymorphonuclear cells (PMN) membrane fluidity, the PMN cytosolic Ca2+ content and the PMN membrane cholesterol/phospholipid ratio (C/PL). From the obtained data, it is evident that, while the lRFR of unfractionated WBC distinguishes normals from diabetics of type 1 and 2, the fIltration parameters of the PMN and mononuclear cells (MN) do not show any significant difference. PMN membrane fluidity, PMN cytosolic Ca2+ content and PMN C/PL do not discriminate normals from diabetics of type 1 an…