Search results for "type"

Type of Delivery, Neuropsychological Development and Intelligence in Twin Births

2019

Based on a retrospective cohort design with six-year-old children born in twin births, the relationship between verbal, non-verbal, global neuropsychological development, general intelligence and type of delivery has been studied. To this end, the possible effect of third gestational, obstetric and neonatal variables, such as maternal age at delivery, fetal presentation, gestational age, newborn weight and Apgar at minute one, was controlled. The exposed cohort includes children born by cesarean section, and the unexposed cohort is composed of children born vaginally with or without induction. A total of 124 children were evaluated in their first year of primary school using the Child Neuro…

On Descriptive Characterizations of an Integral Recovering a Function from Its $$L^r$$-Derivative

2022

The notion of Lr-variational measure generated by a function F ∈ Lr[a, b] is introduced and, in terms of absolute continuity of this measure, a descriptive characterization of the HKr -integral recovering a function from its Lr-derivative is given. It is shown that the class of functions generating absolutely continuous Lr-variational measure coincides with the class of ACGr -functions which was introduced earlier, and that both classes coincide with the class of the indefinite HKr-integrals under the assumption of Lr-differentiability almost everywhere of the functions consisting these classes

The Social Life of Viruses

2021

Despite their simplicity, viruses exhibit certain types of social interactions. Situations in which a given virus achieves higher fitness in combination with other members of the viral population have been described at the level of transmission, replication, suppression of host immune responses, and host killing, enabling the evolution of viral cooperation. Although cellular coinfection with multiple viral particles is the typical playground for these interactions, cooperation between viruses infecting different cells is also established through cellular and viral-encoded communication systems. In general, the stability of cooperation is compromised by cheater genotypes, as best exemplified…

Cholesterol-Streptolysin O Interaction: An EM Study of Wild-Type and Mutant Streptolysin O

1998

We present transmission electron microscopical data from negatively stained specimens of cholesterol following interaction with the thiol-activated bacterial toxin streptolysin O (SLO) (wild-type and a number of cysteine substitution mutants), with and without chemical modification of the cysteine residues. Two experimental systems were used, one with an aqueous suspension of cholesterol microcrystals and the other with immobilized thin planar cholesterol crystals attached to a carbon film. In both systems the wild-type SLO and two cytolytically active mutants, Cys 530 --Ala (C530A) and Ser 101 --Cys (S101C), readily generated the characteristic SLO arc- and ring-like oligomers on the surfa…

Resonance properties of GABAergic interneurons in immature GAD67-GFP mouse neocortex.

2014

Subthreshold resonance is a characteristic membrane property of different neuronal classes, is critically involved in the generation of network oscillations, and tunes the integration of synaptic inputs to particular frequency ranges. In order to investigate whether neocortical GABAergic interneurons show resonant behavior already during early postnatal development, we performed whole-cell patch-clamp recordings from visually identified interneurons in supragranular layers of parietal regions in coronal neocortical slices from postnatal day (P) P6-P13 GAD67-GFP knock-in mice. Subthreshold resonance was analyzed by injection of sinusoidal current with varying frequency. About 50% of the inve…

Coloration reflects behavioural types in the convict cichlid, Amatitlania siquia.

2015

9 pages; International audience; Interindividual behavioural differences, consistent over time and across situations, are frequently related to differences in reproductive success, susceptibility to disease and competitive ability. The behavioural phenotype of a conspecific is likely to affect the outcome of a social interaction, so an individual must be able to accurately assess behavioural phenotypes in order to optimize behavioural responses during mate choice, cooperative relationships and agonistic interactions. However, behavioural assessment based on dyadic interactions in different contexts can be costly because it may require significant time, increase the risk of predation and oft…

Virulence genotypes of Helicobacter pylori in Palermo, Italy

2006

Scientifiques de pixels et scientifiques en herbe

2018

À partir du constat répété de la sous-représentation des filles et des jeunes issus des classes populaires en sciences, cet article interroge le rôle des représentations des métiers scientifiques: sur papier comme sur écrans, les scientifiques sont en effet massivement des hommes blancs des classes favorisées. Pour apporter un éclairage sociologique sur cette problématique, nous montrons l’articulation entre les représentations enfantines des sciences et ces mises en images des métiers dans les produits culturels pour la jeunesse (manuels, ouvrages, émissions télévisées, jeux…). Les analyses proposées s'appuient sur une enquête qualitative par observations en entretiens menée auprès d'élève…

Cell Therapy in Type 1 Diabetes

2011

The incidence of diabetes mellitus has grown exponentially in the last few years. Etiopathogenesis of diabetes implies a ?-cells damage in the islet of Langerhans, either through an autoimmune reaction present in type 1 diabetic patients or through altered function within these cells that affect their ability to secrete a properly functioning insulin hormone, in patients suffering from type 2 diabetes. Exogenous insulin supply is, at the moment, the therapy of choice of the disease but it does not allow tight control of glucose regulation, leading to long-term complications. Over the past few decades, pancreas or pancreas-kidney organ transplantation has been the most effective treatment fo…

Can Dasymetric Mapping Significantly Improve Population Data Reallocation in a Dense Urban Area?

2016

The issue of reallocating population figures from a set of geographical units onto another set of units has received a great deal of attention in the literature. Every other day, a new algorithm is proposed, claiming that it outperforms competitor procedures. Unfortunately, when the new (usually more complex) methods are applied to a new data set, the improvements attained are sometimes just marginal. The relationship cost-effectiveness of the solutions is case-dependent. The majority of studies have focused on large areas with heterogeneous population density distributions. The general conclusion is that as a rule more sophisticated methods are worth the effort. It could be argued, however…