Studies on the effect of natural mineral fillers on the properties of leathers intended for safety footwear

Zbadano i porównano niektóre parametry chemiczne, fizyko-mechaniczne i higieniczne skór obuwiowych (wierzchnich i podszewkowych) z wypełnieniem opartym na naturalnych kompozytach mineralnych: zeolicie (MDZ), montmorylonicie (MDM) oraz ich mieszaninie (MDM/MDZ) z wartościami takich samych parametrów wyznaczonych dla skór odniesienia („control”) z wypełnieniem Tanicor FTG. Badania wykazały, że zastosowanie łatwo dostępnych, tanich wypełniaczy mineralnych nie obniża jakości badanych skór. Zatem, wykorzystanie materiałów kompozytowych opartych na surowcach mineralnych do modyfikowania struktury skóry może być nowym kierunkiem rozwoju technologii wyprawy skór przeznaczonych na obuwie bezpieczne, zawodowe.Some chemical, physical-mechanical, and hygienic parameters for footwear leathers (upper, lining) with natural, mineral filling: zeolite (MDZ), montmorillonite (MDM), and their mixture (MDM/MDZ) were determined and compared with the same parameters established for control leathers containing Tanicor FTG as a filling. The studies indicated that modification of tested leathers by the easily accessible, cheaper, mineral filling did not negatively affect and make worse their quality. Then, the application of composite materials based on the natural minerals for modification of leather structure may be a new direction of development for the technology of processing leather intended for safety footwear

Minimisation of environmental effects related with storing fly ash from combustion of hard coal

The tests have been carried out on granulation of fly ash that may significantly reduce the consequences of its storage and transport harmful to the environment, mainly secondary dusting. Granulation was conducted using a disk granulator. The experiments involved the evaluation of a loose additive (bentonite) impact, the analysis of moisture content and water and sodium glass impact, the optimisation of the added bentonite amount and the granulated product breaking resistance test. The were examined such parameters as the ratio of ash to fillers, the amount of supplied binding liquid (distilled water or waterglass) and the place of its feeding. The addition of bentonite to bed (ash) made it possible to completely granulate the material. The introduction of waterglass in place of demineralised water produced the desired effect

Studies on selected properties of natural mineral modified leathers with the addition of polyhexamethylenebiguanide-based preparation

Zbadano strukturę i wybrane parametry fizyko-mechaniczne, higieniczne i mikrobiologiczne podszewkowych skór obuwiowych z wypełnieniem opartym na naturalnych kompozytach mineralnych: zeolicie (MMZ), montmorylonicie (MMT) z dodatkiem preparatu na bazie poliheksametylenobiguanidy (PHMB). Badania wykazały poprawę badanych właściwości modyfikowanych próbek w odniesieniu do skór bez dodatku PHMB.The structure and the selected physical and mechanical, hygienic and microbiological parameters of footwear lining leather with filling based on natural mineral composite materials: zeolite (MMZ), montmorillonite (MMT) with an addition of a preparation based on polyhexamethylene biguanide (PHMB) were tested. The research has shown an improvement in the tested properties of the modified samples in relation to leather without PHMB

Expression of nonspecific cross-reacting antigen species in myeloid leukemic patients and healthy subjects

The reactivity of two monoclonal antibodies recognizing NCA-95 and NCA-55 (MAb 47 and MAb 192, respectively) with a polyclonal anti-NCA serum in myeloid leukemic cells isolated by density gradient centrifugation was compared using an immunofluorescence test (IF). It was observed that the blood myeloid cells in 78.8% of the patients with different types of myelocytic leukemias and all granulocytes of 15 normal donors showed similar expression of the NCA species studied. The leukocytes of the remaining patients did not synthesize the NCA-95 species regardless of the maturation stage of the cells studied. In two patients, synthesis of this NCA form was limited to the fractions containing myelocytes and metamyelocytes. We have found that all anti-NCA antibodies studied recognized different antigenic epitopes in a myeloid cell series. A relationship between the patient's survival and the proportion of NCA-containing cells was also observed