We describe two multicellular implementations of the classical P and PI feedback controllers for regulation gene expression in a target cell population. Specifically, we propose to distribute proportional integral actions over different cellular populations microbial consortium comprising third population whose output needs be regulated. By engineering communication among via appropriate orthog...

drinking water quality can be deteriorated by microbial and toxic chemicals during transport, storage and handling before using by the consumer. this study was conducted to evaluate the microbial and physicochemical quality of drinking water from bottled water coolers.a total of 64 water samples, over a 5-month period in 2012-2013, were collected from free standing bottled water coolers and wat...

background: today, in an attempt to reduce the human exposure to synthetic compounds such as chemical preservatives, some studies aimed at the replacement of artificial preservatives with natural ingredients with natural protective effects. methods: in the present study the microbial inhibition effect of saturejaba chtiarica essential oil in three different concentrations (0.1, 0.05, and 0.025%...

there is a long period between harvested beets and their transfer to the sugar factory. sugar beet crop is damaged and injured during harvest and transport which provides a suitable place for various saccharoliytic microorganisms growth in terms of temperature, moisture, ph and glucose concentration. in this study, samples were randomly selected from the roots stored in spring 2010 and also the...

ventional monocultural crop systems often supported by high inputs of pesticides and fertilizers to sustainable agriculture. Although precise definitions of sustainable agriculture vary, one key aspect is a reduction in agrichemical inputs with a corresponding shift to alternative crop protection strategies, such as cultural practices, organic amendments, resistant or tolerant crop varieties, a...