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Optimization of the location of a car crane for performing the installation of the structure

100%
Marcinkowski P., Banach M., Marcinkowski P., Banach M.
Archives of Civil Engineering
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2015
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issue 4
2
Content available remote

Analysis of the Process of Coal Micronization Conducted in Order to Obtain Coal-Water Liquids

72%
Staroń A., Kowalski Z., Banach M.
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EN
Coal is the most important energy source, but its application in traditional way causes pollution. Preparation of coal-water liquids consists of: initial crushing of coal, wet milling in mixer mill and homogenization. To obtain coal-water liquids there were used three kinds of materials: coal of medium assortment with a low content of ash (6-25 mm), fine coal (0-20 mm) and coal sludge. The parameters of the grinding process which results in coal-water suspensions characterized by the most advantageous functional properties (high stability, low density and viscosity and the smallest equivalent diameter of particles of coal in a slurry) have been chosen and the influence of additives on the listed properties of the suspensions was determined. For suspensions consisted of water and coal independent parameters were vibration frequency 30 1/s, one ball with diameter of 15 mm and amount of water: 70 wt%. Substances which were applied to improve the properties of coal-water suspensions were: Triton X-405, sodium carboxymethyl cellulose and poly(acrylic acid), partial sodium salt-graft-poly(ethylene oxide). The best stability, low viscosity and the lowest density of the suspensions were characterized by coal, water and 0.1 wt% of carboxymethyl cellulose as a result of the 30 min milling.
3

TNF-alpha priming effect on polymorphonuclear leukocyte reactive oxygen species generation and adhesion molecule expression in hemodialyzed patients

54%
Rysz J., Banach M., Stolarek R. A., Pasnik J., Cia?kowska-Rysz A., Markuszewski L., Baj Z.
Archivum Immunologiae et Therapiae Experimentalis
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2006
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vol. 54
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issue 3
209-215
EN
Introduction: The study aimed to assess reactive oxygen species generation and the expressions of some surface antigens on polymorphonuclear leukocytes (PMNs) in patients on regular hemodialysis (HD) treatment. Materials and Methods: The respiratory burst of PMNs was determined with luminol-dependent chemiluminescence (CL) in resting cells and following N-formyl-methionyl-leucyl-phenylalanine (fMLP), phorbol 12-myristate 13-acetate (PMA), or opsonized zymosan (OZ) stimulation and expressed in arbitrary CL units times assay-time (aUmin). The expressions of CD11b/CD18, CD10, and CD13 receptors were determined with flow cytometry. Results: Basal PMN CL was increased in HD patients to up to 1285129 aUmin compared with 89588 aUmin in healthy controls (p<0.05). The CL of unprimed PMNs increased after fMLP stimulation from 3085746 to 4529808 aUmin, and after OZ stimulation from 129451296 to 146781355 aUmin. PMA-stimulated CL of PMNs was similar to control values. The oxidative burst in PMNs from HD patients and healthy controls was similar in response to TNF-alpha alone. The CL of TNF- alpha-primed PMNs in HD patients was significantly lower than CL measured in healthy controls (p<0.05). The expressions of CD10 and CD13 metalloproteinase receptors were also increased (p<0.05). Although CD11b expression was significantly increased at rest and after fMLP stimulation, the expression of another beta-integrin heterodimer compound, CD18, was not increased. Conclusions: These results provide evidence that TNF- priming of PMNs is down-regulated in HD patients despite constitutive up-regulation of resting cytotoxicity and enhanced expression of adhesion and metalloproteinase receptors.
4

Increased whole blood chemiluminescence in patients with chronic renal failure independent of hemodialysis treatment

46%
Rysz J., Potargowicz E., Banach M., Luczynska M., Stolarek R., Bialasiewicz P., Kasielski M., Cialkowska-Rysz A., Nowak D.
Archivum Immunologiae et Therapiae Experimentalis
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2006
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vol. 54
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issue 5
347-352
EN
Introduction: The luminol-enhanced whole blood chemiluminescence (LBCL) assay is a rapid assay for the measurement of reactive oxygen species (ROS) generation by circulating phagocytes. This study's aim was to determine if patients on maintenance hemodialysis (HD) and non-dialyzed patients with chronic renal failure (CRF) have altered LBCL and if dialysis itself affects ROS production in the blood. Materials and Methods: Twenty-six HD patients, 11 non-dialyzed patients with CRF, and 20 gender- and age-matched healthy controls were studied. Resting (rCl) and 210?5 M n-formyl-methionyl-leucyl-phenylalanine-stimulated LBCL (peak chemiluminescence: pCl, total light emission after agonist addition: tCl) calculated per 104 phagocytes present in the 3-l blood samples were measured with a Bio-Orbit? 1251 luminometer at 37?C for 11 min. Results: Prior to the HD session, median rCL, pCL, and tCL were 1.5, 3.0, and 2.8 times higher in HD patients than in healthy controls (p<0.01) and tended to increase at the end of the session. Significant increases in tCl were observed at 30 min and 240 min (end) of HD (1023.5 vs. 1810.6 vs. 2006.8 arbitrary unitss/104 phagocytes, n=9, p<0.05). Median pCl and tCl were 5.0 and 4.3 times higher in non-dialyzed patients with CRF than in healthy controls (p<0.001). However, no significant differences were found between pre- and post-HD LBCL of HD patients and the LBCL of non-dialyzed patients with renal failure. Conclusions: Blood from patients with renal failure generates elevated amounts of oxidants independently of HD treatment. This may add to the understanding of the nature of oxidative stress and suggests the need of antioxidant treatment in these patients.
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