Search results for "relationship"

Victimization, loneliness, overt and relational violence at the school from a gender perspective

2015

This ex post facto study analyzes both the direct relationships between victimization and overt and relational violent behavior of students adolescents as the indirect relationships between these variables through the classroom environment, the loneliness, the nonconformist ideal reputation and transgression of social norms. The sample consisted of 1,795 adolescents (48% females) aged 11 to 18 years (M = 14.2, SD = 1.68). We used a structural equation model to analyze the effect of classroom environment and victimization in violent manifest and relational behavior. The results found that a direct positive relationship between victimization and relational violent behavior and a direct negati…

Sagittal, rotational and transverse changes with three intraoral distalization force systems : Jones jig, distal jet and first class

2020

Background To compare the maxillary dentoalveolar changes of patients treated with three distalization force systems: Jones Jig, Distal Jet and First Class appliances, using digitized models. Material and Methods The retrospective sample comprised 118 digitized models of 59 patients with Class II malocclusion divided into three groups: Group 1 consisted of 22 patients treated with the Jones Jig appliance; Group 2 consisted of 20 patients treated with the Distal Jet, and Group 3 comprised 17 patients treated with the First Class appliance. Pretreatment and post-distalization plaster models of all patients were digitized and evaluated with OrthoAnalyzerTM software. The pretreatment and post-d…

Learning opportunities in the outdoor school–empirical findings on outdoor school in Germany from the children’s perspective

2017

This article examines learning processes and learning opportunities in the outdoor school based on 13 focus-group interviews with children (ages 8–9) at three German elementary schools. For 1 year,...

L'inflation scolaire : Les désillusions de la méritocratie

2006

06001 - Il existe une édition japonaise, parue en décembre 2007, avec préface inédite.; « Les études, plus on fait, mieux on se porte ». Voici ce qu'on pourrait lire dans le Dictionnaire des idées reçues contemporaines à l'entrée « Ecole ». Cette conviction partagée est-elle encore pertinente ? On peut en douter. Pour les individus d'abord, dont le mérite ne se trouve pas nécessairement mieux reconnu, ni l'hérédité sociale mieux conjurée, parce qu'ils seront restés plus longtemps sur les bancs de l'école. Pour la société ensuite, car la distribution des places et des emplois ne se fait pas forcément de manière plus pertinente quand elle s'appuie sur les seuls diplômes délivrés par l'école. …

Enhanced susceptibility of cholesteryl sulfate-enriched low density lipoproteins to copper-mediated oxidation

1995

AbstractCholesteryl sulfate (CS) is a minor component of cell membranes, also present in lipoproteins, and its exact function is unknown. Since oxidation of low density lipoproteins (LDL) is thought to be an important determinant of atherogenesis, we investigated the influence of CS enrichment on copper-mediated oxidation of LDL. CS was found to act as a pro-oxidant, as measured by lipid oxidation parameters. The results also suggest that these effects were dependent on the sulfate group since pure cholesterol or cholesteryl acetate did not promote Cu2+-mediated oxidation. Our findings imply that CS may affect the oxidizability and hence the potential atherogenicity of LDL.

Salmo trutta is more sensitive than Oncorhynchus mykiss to early-life stage exposure to retene

2021

Salmonids are known to be among the most sensitive fish to dioxin-like compounds (DLCs), but very little is known about the sensitivity of the brown trout (Salmo trutta), which has declined and is endangered in several countries of Europe and Western Asia. We investigated the sensitivity of brown trout larvae to a widespread dioxin-like PAH, retene (3.2 to 320 μg.L−1), compared to the larvae of a salmonid commonly used in toxicology studies, the rainbow trout (Oncorhynchus mykiss). Mortality, growth, cyp1a induction and the occurrence of deformities were measured after 15 days of exposure. Brown trout larvae showed a significantly higher mortality at 320 μg.L−1 compared to rainbow trout lar…

Making and breaking relationships on social media: the impacts of brand and influencer betrayals

2021

This study considers how the relationships between social media influencers, brands and individuals are intertwined on social media and analyses the spill-over effects of feelings of betrayal. An experimental design with two transgression scenarios (influencer vs. brand) was created, and 250 individuals were recruited to participate in the study. The results show that a perceived betrayal by a brand can negatively affect the perceived coolness of the social media influencer that has endorsed the brand, as well as the parasocial relationships that followers have with the influencer. Accordingly, a perceived betrayal by a social media influencer can negatively affect attitudes, trust and purc…

PPAR-γ Agonist GW1929 But Not Antagonist GW9662 Reduces TBBPA-Induced Neurotoxicity in Primary Neocortical Cells

2013

Tetrabromobisphenol A (2,2-bis(4-hydroxy-3,5-dibromophenyl)propane; TBBPA) is a widely used brominated flame retardant. TBBPA induces neuronal damage, but the mechanism by which this occurs is largely unknown. We studied the possible involvement of peroxisome proliferator-activated receptor gamma (PPAR-γ) in TBBPA-induced apoptosis and toxicity in mouse primary neuronal cell cultures. TBBPA enhanced both, caspase-3 activity and lactate dehydrogenase (LDH) release in neocortical cells after 6 and 24 h of exposition. These data were supported at the cellular level with Hoechst 33342 staining. Immunoblot analyses showed that, compared with control cells, 10 μM TBBPA decreased the expression of…

The role of POSS on the structure-properties relationship in Polystyrene based nanocomposites

2011

P(HPMA)-block-P(LA) copolymers in paclitaxel formulations: Polylactide stereochemistry controls micellization, cellular uptake kinetics, intracellula…

2012

In order to explore the influence of polymer microstructure and stereochemistry in biological settings, the synthesis, micellization, cellular fate and the use in paclitaxel formulations of poly(N-(2-hydroxypropyl)-methacrylamide)-block-poly(L-lactide) (P(HPMA)-block-P(LLA)) and poly(N-(2-hydroxypropyl)-methacrylamide)-block-poly(DL-lactide) block copolymers (P(HPMA)-block-P(DLLA)) were studied. To this end, P(HPMA)-block-P(lactide) block copolymers and their fluorescently labeled analogues were synthesized. The polymers exhibited molecular weights M-n around 20,000 g/mol with dispersities (D=M-w/M-n) below 1.3. In addition, the solution conformation of this new type of partially degradable…