Comparative analysis of microbial community under acclimation of linear alkylbenzene sulfonate (LAS) surfactants and degradation mechanisms of functional strains.

Linear alkylbenzene sulfonate (LAS) is one of the most widely used anionic surfactants and a common toxic pollutant in wastewater. This study employed high throughput sequencing to explore the microbial community structure within activated sludge exposed to a high concentration of LAS. Genera such as Pseudomonas, Aeromonas, Thauera and Klebsiella exhibited a significant positive correlation with LAS concentrations.

Denitrificimonas halotolerans sp. nov., a novel species isolated from UASB sludge treating landfill leachate.

A Gram-stain-negative, facultative anaerobe, rod-shaped strain JX-1 was isolated from UASB sludge treating landfill leachate in Wuhan, China. The isolate is capable of growing under conditions of pH 6.0-11.

gen. nov., sp. nov., a novel member of family isolated from activated sludge collected in Shenzhen, PR China.

A Gram-stain-negative, strictly aerobic and filamentous bacterial strain, designated as DQS-5, was isolated from the activated sludge of a municipal sewage treatment plant in Shenzhen, PR China. Optimal growth was observed at 28 °C and pH 7.5.

sp. nov., a novel member of isolated from activated sludge in Hefei, PR China.

A floc-forming bacterial strain, designated HF-7, was isolated from the activated sludge of an industrial wastewater treatment plant in Hefei, PR China. Cells of this strain were Gram-stain-positive, catalase- and oxidase-negative, facultatively anaerobic, and rod-shaped. Growth occurred at 20-42 °C (optimum, 28 °C), at pH 5.

Effects of profenofos on the growth, reproduction, behavior, and gene transcription of Daphnia magna.

Profenofos (PFF) is an organophosphorus pesticide frequently detected in surface waters, soil habitats, and even biota. Some studies have demonstrated the potential risks of PFF to aquatic organisms. However, most of these studies were focused on its acute rather than chronic impacts, and the subjects are usually large vertebrates.

Greater toxic potency of bisphenol AF than bisphenol A in growth, reproduction, and transcription of genes in Daphnia magna.

Limited studies were performed to evaluate the effects of bisphenol A (BPA) and bisphenol AF (BPAF) in low-trophic-level animals, such as Daphnia magna (D. magna). In this study, a 21-day standard reproductive toxicity test was carried out to assess the effects of the 2 bisphenols on development, reproduction, and transcription of genes in D.

A comprehensive system for detection of behavioral change of D. magna exposed to various chemicals.

The purpose of the present study was to develop a sensitive and comprehensive method, based on D. magna swimming behavior, for toxicity assessment of environmental chemicals. Firstly, D.

Toxicity of tris(2-chloroethyl) phosphate in Daphnia magna after lifetime exposure: Changes in growth, reproduction, survival and gene transcription.

In recent years, with the elimination of brominated flame retardants (BFRs), the product volume of tris(2-chloroethyl) phosphate (TCEP), as a main substitute of BFRs, was increasing and frequently detected in natural waters. However, the current toxicological studies on TCEP were mainly focused on the partial life stage assessment of model animals, and thus it might underestimate the impact of TCEP on environmental risks. Therefore, the whole-life-stage effects of TCEP on growth, reproduction, survival and gene transcription in Daphnia magna (D.

Effects of tris (2-chloroethyl) phosphate (TCEP) on growth, reproduction and gene transcription in the protozoan Tetrahymena thermophila.

As a typical organophosphorus flame retardant, tris (2-chloroethyl) phosphate (TCEP) has been widely detected in various environmental media. Toxicity of TCEP to vertebrates have been investigated, but potential effects on lower trophic level species were unknown to date. In this study, toxic effects and molecular mechanisms of toxic actions of TCEP on the aquatic protozoan Tetrahymena thermophila were evaluated by use of phenotypic observations, transcriptome sequencing analysis and real-time quantitative PCR detection.

Effects of triphenyl phosphate on growth, reproduction and transcription of genes of Daphnia magna.

The additive flame retardant triphenyl phosphate (TPHP) has been frequently detected in environments and biota. Evidences indicate that TPHP has potential risks to aquatic organisms. Seldom has been reported about its chronic effects to aquatic organism at low trophic levels, such as Cladocera.

Whole-Life-Stage Characterization in the Basic Biology of Daphnia magna and Effects of TDCIPP on Growth, Reproduction, Survival, and Transcription of Genes.

Toxicity tests of chemicals have mainly focused on the partial life-cycle evaluation of model animals. Limited information is available for the evaluation of effects of chemicals from a whole-life-stage exposure perspective. The objective of this study was to perform a whole-life-stage characterization in the basic biology of Daphnia magna (D.