Acute choroidal involvement in lupus nephritis: A case report and review of literature.

Background: Systemic lupus erythematosus (SLE), characterized by the production of autoantibodies and widespread deposition of immune complexes, predominantly affects women of childbearing age. More than one-third of SLE patients present ocular manifestations. Choroidal disease is currently not completely understood, and its precise differentiation from central serous chorioretinopathy is rarely achieved.

[Effects of Free Ammonia Regulation on the Performance of High Solid Anaerobic Digesters with Dewatered Sludge].

High free ammonia nitrogen (FAN) is regarded as a main factor that inhibits biogas production in high solid anaerobic digestion systems with dewatered sludge. Two mesophilic semi-continuous anaerobic digesters fed with dewatered sludge (input total solids=15%) were operated and their performance under different FAN concentrations by two regulation methods including pH reduction and total ammonia nitrogen (TAN) promotion were investigated. Results showed that when FAN was elevated from (400±174) mg·L to (526±25) mg·L with the increase of TAN, the daily biogas yield declined from (11.