[Analysis of Respirogram Characteristics of Filamentous Bulking Caused by Low Dissolved Oxygen].

The current research on filamentous bulking focuses on the effluent quality and the settling properties but the reports on the microbial physiology under filamentous bulking conditions are seldom. In this study, the variations in the respirogram of microorganisms and affinity coefficient during filamentous bulking were explored in a sequence batch reactor. Low dissolved oxygen, regarded as the typical reason for filamentous bulking, was applied as the stimulation method.

Characterization of aerobic granular sludge of different sizes for nitrogen and phosphorus removal.

Granular size plays a key role in the performance of the aerobic granular sludge (AGS). As the diameter of the granule increases, stratification may begin to appear due to the increase in mass transfer resistance. Aerobic granules harvested from a lab-scale anaerobic-aerobic sequencing batch reactor (AO-SBR) were classified into three categories according to their size: (a) 0.

[Endogenous respiration process analysis of heterotrophic biomass and autotrophic biomass based on respiration map ].

The endogenous process is an important metabolic part of the activated sludge, and the understanding of this process is still unclear. Characteristics of endogenous respiration for heterotrophic bacteria and autotrophic nitrifiers were analyzed using respirogram. Results showed that both heterotrophic and autotrophic bacteria entered the stage of endogenous respiration at almost the same time, but heterotrophic bacteria first entered the stage of dormancy i.

Arsenic trioxide increases the sensitivity of 786-0 renal carcinoma cells to radiotherapy.

We evaluated the combined effect of As(2)O(3) and ionizing radiation on cultured renal carcinoma cells. The cells receiving both As(2)O(3) and radiotherapy had more DNA damage, more apoptosis, more reactive oxygen species produced, more cells in G(2)/M phase, and a lower mitochondrial membrane potential than cells treated with As(2)O(3) only or with radiotherapy only (for all comparisons, p < .05).