[Microbial Diversity of Filamentous Sludge Bulking at Low Temperature].

To investigate the characteristics of microbial diversity during filamentous bulking at low temperature, the induction of sludge bulking was successfully carried out using a low-temperature sequencing batch reactor(SBR). With the help of Illumina MiSeq high-throughput sequencing technology, the overall changes in the microbial community structure of activated sludge, the characteristics of each specific microbial community, and the specific genera were all investigated under different sludge sedimentation performances. The results showed that filamentous bulking can be successfully induced after the system operating temperature drops to (14±1)℃, and the COD and TN removal rates can still be maintained at approximately 90% and 86%, respectively, with the sludge volume index deteriorating to 663.

Gas/particle partitioning, particle-size distribution of atmospheric polybrominated diphenyl ethers in southeast Shanghai rural area and size-resolved predicting model.

A size-segregated gas/particle partitioning coefficient K was proposed and evaluated in the predicting models on the basis of atmospheric polybrominated diphenyl ether (PBDE) field data comparing with the bulk coefficient K. Results revealed that the characteristics of atmospheric PBDEs in southeast Shanghai rural area were generally consistent with previous investigations, suggesting that this investigation was representative to the present pollution status of atmospheric PBDEs. K was generally greater than bulk K, indicating an overestimate of TSP (the mass concentration of total suspended particles) in the expression of bulk K.

Occurrences, composition profiles and source identifications of polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) in ship ballast sediments.

The aim of this study was to investigate the levels of persistent organic pollutants (POPs) including polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) in ship ballast sediments. The ballast sediment samples were collected from six merchant ships docked in 2015 in Jiangyin City, China. Ballast sediments represent a potential vector for the transport of POPs and invasive species between marine environments.

Laboratory study of the particle-size distribution of Decabromodiphenyl ether (BDE-209) in ambient air.

Laboratory measurements for particle-size distribution of Decabromodiphenyl ether (BDE-209) were performed in a 0.5 m(3) sealed room at 25 °C. BDE-209 was manually bounded to ambient particles.

[The generation of H2O2 in wheat hypersensitive reaction induced by leaf rust fungus].

H2O2 burst in the defense responses of Wheat (Triticum aestivum L.) infected with compatible and incompatible leaf rust fungus races (Puccinia recondita f.sp.

[Ultracytochemical localization of enzymes and DNA analysis during the development of garlic].

It is believed that during storage, the parenchyma cells of garlic (Allium sativum L.) bulb would wither and fade gradually, and nutrients released inside the cells become available for the germination and growth of the young bud. In this study, The distributions of acid phosphatase (APase) and Adenosine Triphosphatase (ATPase) during germination were analyzed based on the method of lead precipitation at the electron microscopic level.

[Histological observation on programmed cell death in wheat-leaf rust fungus intreaction].

The biochemical character of PCD in different interaction between wheat and Puccinia recondita f. sp tritici was observed using DNA agarose gel electrophoresis and end labeling in situ (Terminal Deoxynucleotidyl Transferase-mediated dUTP Nick End TUNEL). The DNA ladder, which is the typical character of programmed cell death(PCD), was observed in incompatible combination (cv.

[Studies on the change of intercellular connection and the appearance and function of ectodesmata-like structure in garlic clove during the dormancy development].

The characteristics of intercellular connection have been observed during the dormancy development of garlic by the transmission electron microscope (TEM). The results indicated that the appearances of the different states of intercellular connection were physiological adaptation to the development of garlic clove during storage. Ectodesmata-like existed at the wall boundary between the declining tissue and the living cells in the garlic during germination period.

[Histological observation on programmed cell death in wheat--leaf rust fungus intreactioin].

The ultrastructural features of mesophyll cell surrounding the fungus in different interaction between wheat and Puccinia recondita f. sp tritici were observed with transmission electron microscopy. In incompatible combination(cv.