This present study was conducted to evaluate the effects of dietary inclusion of 4, 8 and 12 g kg-1 phytogenic feed additives mixture on performance, egg quality, ovary parameters, serum biochemical parameters and yolk trimethylamine level in laying hens. The results of experiment have shown that egg weight was increased by supplementation of 12 g kg-1 feed additive wherea...

This paper studies panel quantile regression models with endogeneity and additive fixed effects. We focus on static panel model where regressors and instruments are not predetermined. The fixed effect approach causes an incidental parameter bias in the estimates of the parameters of interest, and we characterize this bias under an asymptotic where both panel dimensions become large. We encounte...

The aim of the present study was to evaluate the effects of various levels of inbreeding, breed and gender on the phagocytic activity of leucocytes in rabbits. A total of 60 rabbits was used for this purpose (30 ♀ + 30 ♂). They were allotted into groups by breed, gender and inbreeding level as determined by Wright’s method. The phagocytic reaction was determined by Valchanov’s method in which a...

There is increasing evidence that heritable variation in gene expression underlies genetic variation in susceptibility to disease. Therefore, a comprehensive understanding of the similarity between relatives for transcript variation is warranted--in particular, dissection of phenotypic variation into additive and non-additive genetic factors and shared environmental effects. We conducted a gene...

Combinations of positive modulators of benzodiazepine and neuroactive steroid sites on GABA(A) receptors have been shown to act in an additive or supra-additive manner depending on the endpoint under study, but they have not been assessed on experimentally induced conflict or drug self-administration. The present study examined the interactive effects of the benzodiazepine triazolam and the neu...

A diallel cross experiment of 4 rice (Oryza sativa L.) female and 6 male varieties was conducted to study the genetic effects and their interaction with salt-stress condition of 7 agronomic traits in normal and salt-stressed planting conditions. The panicle length (PL), effective number of panicles per plant (ENP), plumped number of grains per panicles (PNG), total number of grains per panicles...

We study the role of establishment-specific wage premiums in generating recent increases in West German wage inequality. Models with additive fixed effects for workers and establishments are fit in four sub-intervals spanning the period from 1985 to 2009. We show that these models provide a good approximation to the wage structure and can explain nearly all of the dramatic rise in West German w...