Estimation of dietary intake of polychlorinated dibenzo-p-dioxins and dibenzofurans and dioxin-like polychlorinated biphenyls from the Thai total diet study in 2019.

Dietary intakes of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) were assessed in the Thai Total Diet Study (TDS) in 2019. Food samples including portable water (n = 1048) were collected from four regions of Thailand to represent a whole diet of Thai population, prepared as consumed and analyzed. To estimate the dietary intakes of PCDD/Fs and DL-PCBs, the concentrations in 18 food groups were combined with the respective food consumption from the national consumption data of Thailand and with a mean body weight of 57.

Short-term dynamic behavior of Escherichia coli in response to successive glucose pulses on glucose-limited chemostat cultures.

The effect of repeated glucose perturbations on dynamic behavior of Escherichia coli DPD2085, yciG::LuxCDABE reporter strain, was studied and characterized on a short-time scale using glucose-limited chemostat cultures at dilution rates close to 0.18h(-1). The substrate disturbances were applied on independent steady-state cultures, firstly using a single glucose pulse under different aeration conditions and secondly using repeated glucose pulses under fully aerobic condition.

Comparison of the transient responses of Escherichia coli to a glucose pulse of various intensities.

Dynamic stimulus-responses of Escherichia coli DPD2085, yciG::LuxCDABE reporter strain, to glucose pulses of different intensities (0.08, 0.4 and 1 g L(-1)) were compared using glucose-limited chemostat cultures at dilution rate close to 0.

Real-time monitoring of metabolic shift and transcriptional induction of yciG::luxCDABE E. coli reporter strain to a glucose pulse of different concentrations.

Ineffective mixing entailing heterogeneity issue within industrial bioreactors has been reported to affect microbial physiology and consequently bioprocess performances. Alteration of these performances results from microorganism ability to modulate their physiology at metabolic and/or transcriptional levels in order to survive in a given environment. Until now, dynamics of both metabolic and transcriptional microbial response to external stimuli have been investigated using mainly ex situ measurements with sampling and/or quenching constraints.