Quorum sensing mediated response of Achromobacter denitrificans SP1 towards prodigiosin production under phthalate stress.

Quorum sensing is a density-dependent chemical process between bacteria, which may be intergenus or intragenus. N-acyl homoserine lactones (HSLs) are a type of small signaling molecules associated with Gram-negative bacteria for monitoring their own population density. The present study unveils the mechanism of HSLs in Achromobacter denitrificans SP1 while transforming di(2-ethylhexyl) phthalate (DEHP) into prodigiosin in a simple basal salt medium.

Response surface optimization of prodigiosin production by phthalate degrading SP1 and exploring its antibacterial activity.

The role of various parameters like temperature, pH, blood bag concentration, agitation and incubation that influence the production of prodigiosin by SP1 was determined. The Plackett-Burman and Box-Behnken experimental designs were employed to statistically optimize and find out the best combinational effect of parameters for the better yield of prodigiosin using blood bag as sole carbon and energy source for the growth of SP1. The maximum (1.

Spatio-temporal distribution of perchlorate and its toxicity in Hydrilla verticillata.

The spatio-temporal distribution of perchlorate in water sources around an ammonium perchlorate production unit and its toxicity response on a dominant aquatic plant, Hydrilla verticillata are reported in this study. Samples (n=453) from ground water (open well) and surface water sources within 5km from the production unit over a period of 12 months (2014, June - 2015, May) were screened for ClO. During the period, ClOconcentration in ground water samples close to the production unit increased to >40,000μg/L, and ClO was detected at 1740μg/L in well water 1.

A monograph on the remediation of hazardous phthalates.

Phthalates or phthalic acid esters are a group of xenobiotic and hazardous compounds blended in plastics to enhance their plasticity and versatility. Enormous quantities of phthalates are produced globally for the production of plastic goods, whose disposal and leaching out into the surroundings cause serious concerns to the environment, biota and human health. Though in silico computational, in vitro mechanistic, pre-clinical animal and clinical human studies showed endocrine disruption, hepatotoxic, teratogenic and carcinogenic properties, usage of phthalates continues due to their cuteness, attractive chemical properties, low production cost and lack of suitable alternatives.

Potato flour mediated solid-state fermentation for the enhanced production of Bacillus thuringiensis-toxin.

In this study, we explored the efficacy of raw potato flour (PF) as supplement to the conventional LB medium (LB control, designated as M1) for enhancing the concomitant production of endospores and δ-endotoxin from Bacillus thuringiensis subsp. kurstaki by solid-state fermentation (SSF). Of different concentrations and combinations of media tested, 10% (w/v) PF supplemented LB medium (M2) was found as the best source for the maximum yield of toxin.