Most genetically modified plants are made with antibiotic-resistant genes and promoters derived from plant pathogens. To promote public acceptance, we have adapted a selectable marker and promoters all of which were derived from Arabidopsis thaliana to transformation. We have employed the gene for acetolactate synthase with its own promoter as a selectable marker, and the actin 2 gene promoter ...

The goal of this study was to compare the effects Bacillus subtilis and antibiotic enrofloxacin on growth performance, immune response, intestinal histomorphometry cecal Salmonella numbers in broilers challenged with S. gallinarum. Salmonella-free chicks (n = 240) were allocated four groups, comprising six replicates 10) each. Group NN not infected received no treatment. SN SE treated enrofloxa...

The antibiotic rifampicin has been used in an investigation of the temporal regulation of gene expression during bacteriophage T4 infection of Escherichia coli. We have asked at what times after infection the transcription of specific cistrons becomes rifampicin insensitive. Gene expression has been studied using analyses of proteins on sodium dodecyl sulfate-acrylamide gels; thus translation h...

The antibiotic rifampicin has been used in an investigation of the temporal regulation of gene expression during bacteriophage T4 infection of Escherichia coli. We have asked at what times after infection the transcription of specific cistrons becomes rifampicin insensitive. Gene expression has been studied using analyses of proteins on sodium dodecyl sulfate-acrylamide gels; thus translation h...

In the different livestock production systems, feed represents highest percentage of investment in poultry production. Producers are constantly seeking to improve their productive parameters by using additives, among most used antibiotic growth promoters. Ecuador, many plant species can be as a source nutrients or medicinal additives. The objective this research was determine effect addition gu...

Biotechnological advances in animal health and nutrition continue to play a significant role the improvement of health, growth, production performance. These biotechnological advancements, especially use direct-fed microbials, also termed probiotics, those genetically modified otherwise, have minimized many challenges facing livestock around world. Such advancements result healthy animals produ...

The roles of multiple promoters in the synthesis of rRNA under different conditions of growth were investigated, using two mycobacterial species as model organisms. When Mycobacterium smegmatis was grown under optimal conditions, its two rRNA operons contributed equally, with two promoters, one from each operon, being responsible for most transcripts. In stationary-phase growth or balanced grow...