PubMed · 14245217
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T S KELLY. 1965-03-13. RETINAL DETACHMENT CENTERS.. https://doi.org/10.1136/bmj.1.5436.724
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This paper examines turbidity removal at a water treatment works in England that receives raw water which is difficult to treat during certain rainstorm events. Rainstorm events lead to elevated levels of turbidity and organic matter found in river waters. A robustness index based on settled turbidity was used to identify periods and events that adversely affected the treatment process. This coupled with raw water sampling data indicated that a change in nature and an increase in natural organic matter (NOM) concentrations occurred following rainstorm events. Experimental work investigated the effect of temperature and NOM on the coagulation process and the results show how increasing levels of NOM significantly impaired the coagulation of particulate material, leading to an increase in settled turbidity.
BACKGROUND: Epidemics of scabies are often associated with wars or other times of social upheaval. This was particularly evident during the Second World War when it was estimated that there were one to two million patients with scabies in Great Britain. OBJECTIVE: This article reviews the work of the zoologist Kenneth Mellanby of England and evaluates his contribution to our knowledge of the diagnosis and treatment of scabies in the Second World War. CONCLUSION: Using humans, Mellanby studied the transmission and treatment of this disease. Among his contributions were knowledge of how many mites the average patient had, and where they were located. He clearly noted and described that the scabies rash was not limited to the location of the mites on the body; he attributed the rash in areas with no mites to "a true sensitization." He found that "fomites were not the major method of transmissions.