Physical-chemical treatment of rainwater runoff in recovery and recycling companies: lab-scale investigation.

Scrap material recovery and recycling companies are producing wastewater in which common pollutants (such as COD, nutrients and suspended solids), toxic metals, polyaromatic hydrocarbons (PAH) and polychlorinated biphenyls (PCB) frequently can exceed the discharge limits. Lab-scale optimisation of different possible physical-chemical treatment techniques was performed on the wastewater originating from three different companies in view of further testing at pilot-scale testing and implementation at full-scale. The lab-scale tests demonstrate that sedimentation or hydrocyclone treatment as stand-alone technique cannot be used for proper treatment of this type of wastewater.

The management of primitive retroperitoneal tumors--problems of clinical, imaging diagnosis, and treatment.

Retroperitoneal tumors, whether primary or resulting from the metastasis of other tumors, are a real challenge for the surgeon, in terms of their diagnosis and treatment. They are relatively rare, under 0.2% of the total number of tumors.

Rasch analysis in measurement of physician work.

This report describes the use of Rasch analysis of paired comparisons in measuring physician work. The method examines the ranking of a series of related medical or surgical procedures by survey of physicians experienced in the provision of such services. Each service in the group is paired with every other service.

[Complex oral rehabilitation of children with cleft lip-jaw-palate].

The prerequisite for the full oral rehabilitation and social adaptation of cleft palate patients is a consistent, comprehensive care system, providing a well organised integration of preventive and interceptive measures, as well as close cooperation between the various specialised disciplines. Preventive stomatological care should begin in infancy.