A strategy for quantifying microplastic particles in membrane filtration processes using flow cytometry.

Microplastic (MP) pollution is ubiquitous in the aquatic environment, with significant quantities of MPs originating from municipal wastewater treatment plants. Efforts to evaluate and implement MP removal processes are underway, with membrane technologies often recommended as an "ideal" solution. A key challenge in evaluating these technologies involves efficiently quantifying MP concentrations in samples.

High-throughput screening to evaluate optimum coagulation conditions via colloidal stability analysis.

Current methods of optimizing the coagulant dosage in wastewater treatment processes typically rely on the use of labor- and material-intensive jar testers, which are inadequate when coagulation processes require frequent adjustments due to variations in properties of the incoming feed. Analytical centrifuges (ACs) employ an integrated optics system that simultaneously monitors the position of the boundary between two separating phases in multiple samples of fairly low volumes (∼2 mL) - thus it was expected that ACs would be ideally suited to study the stability and settling kinetics of coagulation treatment processes. In this study, wastewater samples from a biogas generation facility (known as centrate) were collected in February 2022 (Batch A) and July 2022 (Batch B).

Malignant giant cell tumour of the distal femur treated by excision, allografting and ligamentous reconstruction: an 18-year follow-up.

Extensive osteoarticular allografts have been used for knee reconstruction, but because of their composite nature and the technical difficulty of the procedure, complication and failure rates have been high. There are few records of long-term results in the literature. In this report, a 19-year-old man with a large aggressive giant cell tumour of the left distal femur was treated in 1976 by en bloc resection, massive femoral allografting and ligamentous reconstruction.

[Dermatofibrosarcoma protuberans developing for 25 years with 27 recurrences. Histological and ultrastructural study].

The authors report the results of a histological and ultrastructure study of a case of a protuberant dermatofibrosarcoma evolving for the last 25 years with 27 relapses. Histologically the tumour is dermic, non-encapsulated, invading the hypodermis right from the beginning and mainly made up of fusiform cells which often have a storiform appearance and proliferate in a varying degree of collagenous stroma which includes an oedematous or myxoid component. During the course of the evolution of this tumour, there were zones of cystic degeneration, but in the last 10 relapses in 1978 and 1979, we noted the predominance of cellular and compact zones with an increase in the number of mitoses.