Autor: Kozakiewicz, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Assessment of Usability of Molten Salt Mixtures in Metallurgy of Aluminum Alloys and Recycling of Composite Materials Based on the Matrix of Al Alloys
Ocena przydatności stopionych mieszanin soli w metalurgii stopów aluminium i recyklingu materiałów kompozytowych na osnowie stopów Al
Autorzy:: Jackowski, J.
Suchora-Kozakiewicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/355314.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: fluxing agents
slags
Al alloys
refining and recycling
surface properties
topniki
żużle
rafinacja i recykling
właściwości powierzchniowe
Opis:: Effectiveness of the slags used in metallurgy of aluminum alloys and in recycling of composite materials containing these alloys depends on their surface properties at the phase boundaries they are in contact with. An index of surface properties of molten mixtures of slag-forming salts has been formulated. Its calculated values are compared with measured results of surface tension (liquid – atmosphere) and interfacial tension (liquid – liquid) in the considered systems. It was found that the index can be helpful for purposes of proper choice of the mixtures of slag-forming salts used both in Al alloys metallurgy and in recycling of composite materials based on the matrix of Al alloys.
Skuteczność żużli stosowanych w metalurgii stopów aluminium i recyklingu kompozytów z udziałem tych stopów, zależy od ich właściwości powierzchniowych na granicach faz, z którymi mają kontakt. Opracowano wskaźnik właściwości powierzchniowych stopionych mieszanin soli żużlotwórczych, a jego wyliczone wartości porównano z wynikami pomiarów napięć powierzchniowych (ciecz-atmosfera) i międzyfazowych (ciecz-ciecz) dla badanych układów. Stwierdzono, że wskaźnik ten może być przydatny w doborze mieszanin soli żużlotwórczych stosowanych zarówno w metalurgii stopów Al, jak i recyklingu materiałów kompozytowych na osnowie stopów Al.
Źródło:: Archives of Metallurgy and Materials; 2015, 60, 3A; 1731-1735
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Immunohistochemical evaluation of expression of heat shock proteins HSP70 and HSP90 in mammary gland neoplasms in bitches
Autorzy:: Badowska-Kozakiewicz, A.M.
Malicka, E.
Powiązania:: https://bibliotekanauki.pl/articles/31330.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: Heat shock proteins have essential roles in a number of pathophysiologic conditions including carcinogenesis and represent a group of novel molecular markers in cancer management. The aim of this study was to investigate heat shock protein expression in correlation with other neoplasm traits such as: histological type, differentiation grade, proliferative activity, estrogenic receptor expression, and cyclooxygenase-2 and p53 proteins. Material for the investigation comprised 133 tumors of the mammary gland collected from bitches. In total 14 adenomas, 66 complex carcinomas, 47 simple carcinomas and 6 solid carcinomas were collected. Evaluations were conducted with histopathological and immunohistochemical methods using suitable antibodies. Expression of heat shock protein 70 was observed in all types of evaluated neoplasms. A higher average number of cells undergoing expression of heat shock protein 70, which was statistically insignificant, was established in complex and simple cancers and in cancers with the 1st and the 2nd degree of histological malignancy. Expression of heat shock protein 90 was observed in all studied neoplasms; it was very insignificant in adenomas, compared to cancers, and the highest expression was established in the solid cancers, as well as in cancers with the 2nd degree of histological malignancy. This high expression of heat shock protein 90 was correlated with proliferative activity. The results suggest that heat shock protein 90 is involved in canine mammary gland carcinogenesis. The results also suggest that heat shock protein 90 may be a prognostic factor, but this requires detailed clinical confirmation.
Źródło:: Polish Journal of Veterinary Sciences; 2012, 15, 2
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: In vivo induction of autophagy in splenocytes of C57BL/6 and BALB/c mice infected with ectromelia orthopoxvirus
Autorzy:: Martyniszyn, L.
Szulc-Dabrowska, L.
Boratynska-Jasinska, A.
Badowska-Kozakiewicz, A.M.
Niemialtowski, M.G.
Powiązania:: https://bibliotekanauki.pl/articles/31094.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: Autophagy is a self-degradation process of cellular components. It plays both antiviral and pro-viral roles in the life cycle of different viruses and the pathogenesis of different viral diseases. In this study, we evaluated autophagy induction in splenocytes of ectromelia virus (ECTV)-resistant C57BL/6 and ECTV-susceptible BALB/c mice during infection with the Moscow strain of the ectromelia virus (ECTV-MOS). Autophagy was analyzed using the Western blot method by assessing type II microtubule-associated protein 1 (MAP1) light chain 3 (LC3) and Beclin 1 expression levels relative to β-actin. Results indicated an increased ratio of LC3-II to β-actin in splenocytes of C57BL/6 mice only at 7 day post infection (d.p.i.) compared to uninfected animals. LC3-II/β-actin and Beclin 1/β-actin ratios in splenocytes of BALB/c mice increased at 5 d.p.i. and remained high until day 14 and 7 p.i., respectively. We confirmed the formation of autophagosome structures in the spleen of BALB/c mice by transmission electron microscopy (TEM). Moreover, autophagy accompanied necrosis in the splenocytes of infected animals. Results suggest that ECTV-MOS induced autophagy, especially in the spleen of the susceptible mouse strain, may support viral replication and promote cell necrosis.
Źródło:: Polish Journal of Veterinary Sciences; 2013, 16, 1
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Ścieralność mas formierskich na bazie keramzytu
Grindability of moulding sand based on expanded clay
Autorzy:: Cholewa, M.
Kozakiewicz, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/382319.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: keramzyt
materiał termoizolacyjny
masa formierska
expanded clay
thermal insulating material
moulding sand
Opis:: W pracy przedstawiono analizę jednej z podstawowych własności technologicznych mas formierskich jaką jest ścieralność. Pierwsza część badań wykonana została bez wykorzystania promiennika, druga – z jego wykorzystaniem, co pozwoliło na nagrzanie próbek do temperatury 95°C. Do badań wykorzystano jako osnowę masy formierskiej lekkie kruszywo ceramiczne o bardzo wysokich własnościach termoizolacyjnych, które jest wytwarzane w Polsce i na bazie polskich surowców (LECA® KERAMZYT). W badaniach wykorzystano masę, w której zawartość lepiszcza bentonitowego mieściła się w granicy 7÷35%. Przesłanką podjęcia tematyki badawczej jest brak uregulowań normatywnych dotyczących procesów technologicznych klasycznych metod wytwarzania odlewów cienko- jak i supercienkościennych, których grubość ścianki nie przekracza 3 mm, o znacznie rozwiniętej powierzchni oddawania ciepła podczas krystalizacji. Bezpośrednim przeznaczeniem podobnych mas formierskich jest wykonywanie rdzeni i form do wytwarzania odlewów szkieletowych CRS (Odlewy Wzmacniane Przestrzennie). Wykorzystany materiał badawczy pozwala na spełnienie obydwu kryteriów.
The paper presents an analysis of one of the fundamental properties of moulding technology which is abrasion. The first part of the study was performed without the use of the heater, the second - with its use, which allowed to warm up the samples to temperature of 95°C. During the study a moulding lightweight ceramic aggregate with very high thermal insulation properties, which are manufactured in Poland and Polish-based raw materials (LECA® KERAMZYT) was used as a matrix. The study utilizes the mass, wherein the content of bentonite binder was in the range of 7÷35%. The reason for taking the research subject is the lack of regulations on normative processes of classical methods of producing thin-walled and superthin-walled castings whose thickness is less than 3 mm, with significantly expanded area of heat dissipation during crystallization. The direct purpose of similar sands is the manufacturing of cores and moulds in skeletal castings production by CRS (Casting Reinforce Spatially) method. The research material is sufficient to comply with these two criteria.
Źródło:: Archives of Foundry Engineering; 2013, 13, 2 spec.; 116-120
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The properties of moulding sand with halloysite
Autorzy:: Cholewa, M.
Kozakiewicz, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/382890.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: haloizyt
bentonit
masa formierska
halloysite
bentonite
moulding sand
Opis:: Until now, the mould sand in general use in the foundry industry are based on bentonite, which resulted from the fact that a good recognition properties and phenomena associated with this material. Come to know and normalized content of montmorillonite and carbonates and their important role in the construction of bentonite, and mass properties of the participation of compressive strength or scatter. Halloysite is widely used in industry and beyond them. However, little is known about its use in the foundry in Poland and abroad. This article presents preliminary research conducted at the Foundry Department of Silesian University of Technology on this material. Will raise the question of the representation of this two materials, which contains information connected with history and formation of materials, their structure and chemical composition. In the research, the results of compressive strength tests in wet masses of quartz matrix, where as a binder is used halloysite and bentonite in different proportions.
Źródło:: Archives of Foundry Engineering; 2012, 12, 2; 205-210
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Heat Flow in the Casting – Mould System for Moulds with Gypsum and Cement Binder
Autorzy:: Cholewa, M.
Kozakiewicz, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/380890.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heat flow
moulding sand
gypsum binder
cement binder
thermophysical properties
przepływ ciepła
masa formierska
spoiwo gipsowe
spoiwo cementowe
właściwości termofizyczne
Opis:: The production of thin-walled castings with wall thickness in the range of 1.5 to 3 mm and below requires the development of insulation moulding sands and/or core materials. The test has been taken to develop these kind of materials. The study included a description of their thermophysical properties. Authors described problems related to the heat flow in the casting-mould system, i.e. mathematically described the main dependence of heat give-up during crystallization of the casting. The influence of the content of polyglicol on the thermophysical properties of the mould with gypsum and cement binder was examined. Using the ATD method determined were the increments ΔT₁ and ΔT₂ describing the temperature changes in the mould during crystallization of hypoeutectic alloy of AlSi6 and the temperature difference between casting material and mould during the crystallization. In the considered range of technological parameters a description of the heat flow kinetics was given.
Źródło:: Archives of Foundry Engineering; 2015, 15, 2; 5-8
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Technological Properties of Thermo-insulating Moulding Sands with Organic Binder
Autorzy:: Stec, K.
Cholewa, M.
Kozakiewicz, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/946874.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: skeleton castings
moulding sand
organic binder
technological properties
CRS
odlewy szkieletowe
piasek formierski
środek wiążący
właściwości technologiczne
Opis:: A thermo-insulating moulding sand with a binder made of aluminosilicate microspheres with organic binder was subjected to testing. The aim of the analysis was to determine selected technological properties of the developed compounds. Compressive strength, friability and gas permeability were determined. The binder content was changed within a range of 5÷20 wt% with a 5% step. The applied matrix is characterized by good thermo-insulating properties and a small size of grains, while synthetic organic binder has favourable functional properties, among which the most noteworthy are the extended life and setting time, good rheological properties as well as high resistance to chemical agents. The intended use of the compound is the casting of 3D CRS (Composite Reinforced Skeletons), which are characterized by a well-developed heat transfer surface area, good absorption of impact energy, low mass and a target thickness of connectors within a range of 1.5÷3 mm. The construction of 3D CRS castings is an original concept developed by the employees of the Department of Foundry Engineering at the Silesian University of Technology.
Źródło:: Archives of Foundry Engineering; 2020, 20, 2; 105-110
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Wpływ termoizolacyjnej masy formierskiej na mikrostrukturę żeliwa szarego
Influence of Heat Insulating Moulding Sand on Grey Cast Iron Microstructure
Autorzy:: Cholewa, M.
Baron, C.
Kozakiewicz, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/383214.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: masa formierska
mikrosfery glinokrzemianowe
piasek kwarcowy
struktura pierwotna
własności termofizyczne
moulding sand
aluminosilicate microspheres
quartz sand
primary structure
thermophysical properties
Opis:: W artykule przedstawiono wyniki analiz mikrostruktur żeliwa szarego EN-GJL-HB155. Formy wykonano z różnych mas formierskich – klasycznej bentonitowej, piaskowej z żywicą chemoutwardzalną oraz termoizolacyjnej o osnowie z mikrosfer glinokrzemianowych. Do wykonania odlewów próbnych i formowania wykorzystano czterostopniowy model schodkowy według tzw. „próby schodkowej” o grubości stopni: 3, 5, 10, 20 mm. Podjęte badania stanowią wstęp do analizy mikrostruktur szkieletowych odlewów żeliwnych. Odlewy szkieletowe powinny się charakteryzować niewielką grubością łączników tworzących szkielet (docelowo poniżej 3 mm), wysoko rozwiniętą powierzchnią oddawania ciepła, dobrymi własnościami mechanicznymi oraz z góry ustaloną geometrią komórek elementarnych. Odlewy szkieletowe stanowią oryginalne opracowanie Katedry Odlewnictwa Politechniki Śląskiej.
The article presents results of EN-GJL-HB155 grey cast iron microstructure analysis. Moulds were prepared with use of different moulding sands – classic with bentonite, quartz with chemical hardened resin and heat-insulating with aluminosilicate microspheres matrix. To perform experimental casting and forming four-step pattern according to step test bar with a thickness of: 3, 5, 10, 20 mm were used. The study are the introduction of cast iron skeleton casting microstructure analysis. Skeleton castings should be characterized by a small thickness of connector making the skeleton (the target of less than 3 mm), the highly developed surface of the heat give-up, good mechanical properties and predetermined geometry of elementary cells. Skeleton castings are the original development of the Department of Foundry Engineering of the Silesian University of Technology.
Źródło:: Archives of Foundry Engineering; 2015, 15, 3 spec.; 119-123
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Changes in distribution of 5 methylcytosine in male and female gametophyte of Hyacinthus orientalis before and after fertilization
Autorzy:: Kozlowska, M.
Niedojadlo, K.
Bednarska-Kozakiewicz, E.
Powiązania:: https://bibliotekanauki.pl/articles/80166.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: conference
gene activity
chromatin structure
5-methylcytosine
female gametophyte
male gametophyte
seed development
flowering plant
Hyacinthus orientalis
fertilization
transcriptional activity
epigenetic factor
DNA methylation
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Preliminary Tests of Cellular SiC/Iron Alloy Composite Produced by a Pressureless Infiltration Technique
Autorzy:: Lipowska, B.
Psiuk, B.
Cholewa, M.
Kozakiewicz, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/380467.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: kompozyty ceramiczno-metalowe
ceramika porowata
żeliwo
węglik krzemu
ceramic-metal composites
porous ceramics
cast iron
silicon carbide
Opis:: Preliminary tests aimed at obtaining a cellular SiC/iron alloy composite with a spatial structure of mutually intersecting skeletons, using a porous ceramic preform have been conducted. The possibility of obtaining such a composite joint using a SiC material with an oxynitride bonding and grey cast iron with flake graphite has been confirmed. Porous ceramic preforms were made by pouring the gelling ceramic suspension over a foamed polymer base which was next fired. The obtained samples of materials were subjected to macroscopic and microscopic observations as well as investigations into the chemical composition in microareas. It was found that the minimum width of a channel in the preform, which in the case of pressureless infiltration enables molten cast iron penetration, ranges from 0.10 to 0.17 mm. It was also found that the ceramic material applied was characterized by good metal wettability. The ceramics/metal contact area always has a transition zone (when the channel width is big enough), where mixing of the components of both composite elements takes place.
Źródło:: Archives of Foundry Engineering; 2017, 17, 1; 115-120
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Immunolocalization of AGO1 in female gametophyte cells of Hyacinthus orientalis L. before and after fertilization
Autorzy:: Niedojadlo, K.
Mehelewska, M.
Niedojadlo, J.
Bednarska-Kozakiewicz, E.
Powiązania:: https://bibliotekanauki.pl/articles/80092.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: conference
microRNA
gene expression
protein-coding gene
immunolocalization
AGO1 protein
female gametophyte
Hyacinthus orientalis
fertilization
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Different mutations in Polish patients with HPRT deficiency - the Lesch-Nyhan and Kelley-Seegmiller syndromes
Autorzy:: Popowska, E
Sulek, A.
Kubalska, J.
Pronicka, E.
Jezewska, M.
Trembacz, H.
Goryluk-Kozakiewicz, B.
Krajewska-Walasek, M.
Powiązania:: https://bibliotekanauki.pl/articles/2044455.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: deletion
Lesch Nyhan syndrome
Kelley-Seegmiller syndrome
hypoxanthine-guanine phosphoribosyltransferase deficiency
enzyme activity
Polish patient
point mutation
Opis:: Five families with the Lesch-Nyhan syndrome (LNS) and two families with the Kelley-Seegmiller syndrome (KSS) were studied. Seven different mutations were identified. Two transitions, C526→ T (Prol76Ser) and G481→A (Ala161Thr), in patients with a milder form of hypoxanthine-guanine phosphoribo-syltransferase (HPRT) deficiency were detected. In patients with the Lesch-Nyhan syndrome two transitions, G569→A (Glyl90Glu) and C508→T (Arg170Ter), two transversions, C222→A (Phe74Leu) and C482→A (Ala161Glu), and a deletion of seven nucleotides (from A394 to G400) were observed. All except two of the identified mutations are novel. The C222→A substitution in exon III is located within one of the clusters of hot spots of the HPRT gene and has been previously described in four unrelated patients. The other recurrent mutation C508→T in exon VII has been reported in eight families.
Źródło:: Journal of Applied Genetics; 1998, 39, 1; 103-111
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki