Post awakening salivary cortisol secretion and trait well-being: The importance of sample timing accuracy

Indices of post awakening cortisol secretion (PACS), include the rise in cortisol(cortisol awakening response: CAR) and overall cortisol concentrations (e.g. area under the curve with reference to ground: AUCg) in the first 30—45 min. Both are commonly investigated in relation to psychosocial variables. Although sampling within the domestic setting is ecologically valid, participant non-adherence to the required timing protocol results in erroneous measurement of PACS and this may explain discrepancies in the literature linking these measures to trait well-being (TWB). We have previously shown that delays of little over 5 min(between awakening and the start of sampling) to result in erroneous CAR estimates. In this study, we report for the first time on the negative impact of sample timing inaccuracy (verified by electronic-monitoring) on the efficacy to detect significant relationships between PACS and TWB when measured in the domestic setting.Healthy females (N = 49, 20.5 ± 2.8 years) selected for differences in TWB collected saliva samples (S1—4) on 4 days at 0, 15, 30, 45 min post awakening, to determine PACS. Adherence to the sampling protocol was objectively monitored using a combination of electronic estimates of awakening (actigraphy) and sampling times (track caps).Relationships between PACS and TWB were found to depend on sample timing accuracy. Lower TWB was associated with higher post awakening cortisol AUCg in proportion to the mean sample timing accuracy (p < .005). There was no association between TWB and the CAR even taking into account sample timing accuracy. These results highlight the importance of careful electronic monitoring of participant adherence for measurement of PACS in the domestic setting. Mean sample timing inaccuracy, mainly associated with delays of >5 min between awakening and collection of sample 1 (median = 8 min delay), negatively impacts on the sensitivity of analysis to detect associations between PACS and TWB.

Chromosomal structure: a selectable trait for evolution

Dissertation presented to obtain the Ph.D degree in Evolutionary Biology

Genetic parameters and mapping quantitative trait loci associated with tibia traits in broilers.

Abstract: Selection among broilers for performance traits is resulting in locomotion problems and bone disorders, once skeletal structure is not strong enough to support body weight in broilers with high growth rates. In this study, genetic parameters were estimated for body weight at 42 days of age (BW42), and tibia traits (length, width, and weight) in a population of broiler chickens. Quantitative trait loci (QTL) were identified for tibia traits to expand our knowledge of the genetic architecture of the broiler population. Genetic correlations ranged from 0.56 +/- 0.18 (between tibia length and BW42) to 0.89 +/- 0.06 (between tibia width and weight), suggesting that these traits are either controlled by pleiotropic genes or by genes that are in linkage disequilibrium. For QTL mapping, the genome was scanned with 127 microsatellites, representing a coverage of 2630 cM. Eight QTL were mapped on Gallus gallus chromosomes (GGA): GGA1, GGA4, GGA6, GGA13, and GGA24. The QTL regions for tibia length and weight were mapped on GGA1, between LEI0079 and MCW145 markers. The gene DACH1 is located in this region; this gene acts to form the apical ectodermal ridge, responsible for limb development. Body weight at 42 days of age was included in the model as a covariate for selection effect of bone traits. Two QTL were found for tibia weight on GGA2 and GGA4, and one for tibia width on GGA3. Information originating from these QTL will assist in the search for candidate genes for these bone traits in future studies.

Répertoire général pratique de notariat, de droit civil et fiscal et de formules d'actes : recueil périodique 1° de lois et décrets, avec commentaires ; 2° de jugements, arrêts, solutions, décisions, etc. ; 3° et de formules d'actes notariés : faisant suite au Traité-pratique et formulaire général du notariat / par A. Defrénois

1878 (T3,N2172)- (T3,N3883).

Répertoire général pratique de notariat, de droit civil et fiscal et de formules d'actes : recueil périodique 1° de lois et décrets, avec commentaires ; 2° de jugements, arrêts, solutions, décisions, etc. ; 3° et de formules d'actes notariés : faisant suite au Traité-pratique et formulaire général du notariat / par A. Defrénois

Etat de collection : retirages de 1877-1878

Répertoire général pratique de notariat, de droit civil et fiscal et de formules d'actes : recueil périodique 1° de lois et décrets, avec commentaires ; 2° de jugements, arrêts, solutions, décisions, etc. ; 3° et de formules d'actes notariés : faisant suite au Traité-pratique et formulaire général du notariat / par A. Defrénois

1877 (T2,N1073)- (T2,N2171).

Traité de mécanique : statique, cinématique, dynamique, hydraulique, résistance des matériaux, chaudières à vapeur, moteurs à vapeur et à gaz. Dynamique et hydraulique / par L. Arnal,...

Collection : Encyclopédie théorique et pratique des connaissances civiles et militaires ; partie 1, livre 8

Traité de mécanique : statique, cinématique, dynamique, hydraulique, résistance des matériaux, chaudières à vapeur, moteurs à vapeur et à gaz. Statique et cinématique / par L. Arnal,...

Collection : Encyclopédie théorique et pratique des connaissances civiles et militaires ; partie 1, livre 8

Traité de mécanique : statique, cinématique, dynamique, hydraulique, résistance des matériaux, chaudières à vapeur, moteurs à vapeur et à gaz. Chaudières à vapeur, moteurs à vapeur et à gaz / par L. Arnal,...

Collection : Encyclopédie théorique et pratique des connaissances civiles et militaires ; partie 1, livre 8

Traité de mécanique : statique, cinématique, dynamique, hydraulique, résistance des matériaux, chaudières à vapeur, moteurs à vapeur et à gaz. Statique graphique et résistance des matériaux / par L. Arnal,...

Collection : Encyclopédie théorique et pratique des connaissances civiles et militaires ; partie 1, livre 8