57 research outputs found
Functional properties of coated by chemical vapour deposition sintered tool materials investigated with use of tribological tests
The purpose of the work is to present the results of investigations into the structure and properties of sintered carbides with deposited wear resistant coatings after a tribological test carried out with the method of combined examination of abrasion wear resistance and edge fracture resistance
a comparative study of mechanical properties of fly ash based geopolymer made by casted and 3d printing methods
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Zawartość metalicznych i niemetalicznych pierwiastków w homogenatach próbek tkankowych pobranych z amputowanych na poziomie uda z powodu miażdżycy kończyn dolnych. Doniesienie wstępne
Background: Metallic and non-metallic elements have influence on the development the changes within
structure and function of arteries in different regions of vascular tree. The content of elements into
arterial walls varies according to geographical origin of people.
Material and methods: Tissue specimens were taken from the six lower limbs amputated on the level of
thigh due to atherosclerosis. The mean age was 69 (57 to 84). Tissue specimens were collected from the
limbs from the level of amputation, the popliteal fossa and the dorsal artery of foot. After chemical processing
of the tissues homogenates determination of the content of elements using atomic emission spectrometry
method with inductively coupled plasma (inductively coupled plasma optical emission spectroscopy)
was performed. The content of Al, Ba, Ca, Cu, Fe, K, Mg, Mn, P, S, Sr and Zn was determined.
Results: As a point of reference mean absolute value occurred from six specimens on the level of thigh
was assumed as 100%. Content of non-metallic elements such as Ca, P and S rise towards to periphery
of amputated limb reaching few times higher values on the level of dorsal artery of foot. Content of some
metallic elements such as: Fe, Zn, K and Sr also rise towards to periphery of extremity. The Cu accumulation
was the highest on the level of popliteal fossa, while Mn, Al and Mg concentration was the lowest
on this same level and the highest in dorsal artery of foot.
Conclusions: The influence of individual elements on development the atherosclerosis especially on
necrotic changes requires further investigations.
Described problem pose a preliminary report only in order to indicate the issue and to check the method
of analysis
Specificity of cytochemical and fluorescence methods of senescence-associated β-galactosidase detection for ageing driven by replication and time
Resveratrol and its synthetic derivatives exert opposite effects on mesothelial cell-dependent angiogenesis via modulating secretion of VEGF and IL-8/CXCL8
Telomerase downregulation induces proapoptotic genes expression and initializes breast cancer cells apoptosis followed by DNA fragmentation in a cell type dependent manner
A Study on the Physicochemical Properties of Different Post-Process Wastes from Thermal Processes
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