Dietary Exposure to Particles of Polytetrafluoroethylene (PTFE) and Polymethylmethacrylate (PMMA) Induces Different Responses in Periwinkles .

The marine and ocean water pollution with different-sized plastic waste poses a real threat to the lives of the next generations. Plastic, including microplastics, is found in all types of water bodies and in the organisms that live in them. However, given the chemical diversity of plastic particles, data on their toxicity are currently incomplete.

Degradation of micro-nano-sized polytetrafluoroethylene and acrylic fluorinated copolymer particles in the periwinkle digestive tract.

The aim of the work was to investigate the possible biodegradation of such stable plastics as fluorated acrylic copolymer Protacryl-M and polytetrafluoroethylene-teflon (PTFE)-that are widely applied in medicine for prosthetics in dentistry and orthopedics. Our tasks were as follows: 1. To select a suitable marine biological object (multicellular invertebrate) 2.

Micro-nano-sized polytetrafluoroethylene (teflon) particles as a model of plastic pollution detection in living organisms.

Micro- and nano-sized particles of polytetrafluoroethylene (PTFE) were used as model (reference) particles to study the biological effects of plastic pollution. Since the PTFE molecule contains fluorine, considered as an "atomic marker" sharply distinguishing it from other common plastics, micro- and nano-particles of PTFE have a specific crystalline structure and are, therefore, well identified by the methods of polarized light microscopy (POL), Raman microspectroscopy (micro-Raman), and energy-dispersive spectroscopy (EDS). Examples of PTFE particles detection in hemolimph of the cockroach Blatella germanica, in hemolimph of the larva and in faecal pellets of imago of a fly Lucilia sp.

[Vacuum-assisted excision of focal dysplasia of mammary glands. Single-center experience].

Aim: To assess the diagnostic significance and safety of vacuum-assisted resection in patients with focal breast cancer BIRADS category 3 and 4.

Material And Methods: The procedure was performed in 50 women aged 22 to 51 years (35.1±2.

[Surgical treatment of patients with lung cancer involving mediastinum organs with massive invasion in the thoracic aorta by using the extracorporeal circulation].

The patients (11 cases) with massive invasion in the thoracic aorta have been operated in the period from 2002 till 2010. The tumor of left lung was diagnosed in 9 cases and tumor of the mediastinum--in 2 cases. Prosthetics of the arch of aorta was performed under condition of artificial circulation in 6 cases.