Genetic advance aimed at accelerating the growth rate of slaughter birds have reduced natural resistance poultry to infections. It also increased susceptibility stress, which resulted in deterioration welfare and productivity poultry. Additionally, intensive production poses a risk exposure chickens unfavorable zoo-hygienic conditions contamination with pathogens from external environment (bedd...

this research was conducted to compare the effects of two medicinal plants (peppermint and aloe vera) and antibiotic growth promoter on ileum microflora population and growth performance of broiler chickens. in this experiment, 375 one-day old male broiler chickens (ross 308) were used on a completely randomized design with 5 dietary treatments which were replicated 5 times with 15 birds per re...

Key word: Growth promoter, mono-sex Tilapia, production, probiotic, FCR, SGR The present study was conducted in farmer’s ponds at field level of Muktagachha upazilla to find out the effect of growth promoter on growth performance and feed utilization of monosex Tilapia fish. Growth promoter was used in the experimental cultured farm. This growth enhancing aqua drugs was used in feeds of Tilapia...

In order to study the periplasmic expression of human growth hormone (hGH) in Escherichia coli, the related cDNA was inserted in two expression plasmids carrying pelB signal peptide, one with lac bacterial promoter and the other with a bacteriophage T7-based promoter. The recombinant plasmids were moved to TG1 and BL21 strains of E. coli, respectively. To induce the expression systems, IPTG and...

Hybrid promoter constructs were used to determine the DNA sequence requirements for stringent and growth rate control within a promoter region. The promoters were obtained by fusing complementing sequence regions located upstream and downstream from the GCGC discriminator motif of the growth rate regulated rRNA P1 promoter and a non-regulated tac promoter variant. The activities and the regulat...

insulin-like growth factor-1 gene (igf1) is a biological candidate gene for investigation traits such as growth, body weight and muscles growth in different species. in this research eight pairs of white and wild quails were crossed reciprocally as a base population. a total of 34 quails were produced in first generation (f1) and 422 quails were generated by intercrossing the f1 population. bod...