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Wyświetlanie 1-15 z 21
Tytuł:
Antimicrobial efficacy of mixtures of silver nanoparticles and polyhydric alcohols against health-promoting bacteria
Autorzy:
Czernel, G.
Wasko, A.
Gustaw, K.
Kaminski, D.M.
Matwijczuk, A.P.
Nowicka, A.
Matwijczuk, A.S.
Oniszczuk, T.
Arczewska, M.
Karcz, D.
Powiązania:
https://bibliotekanauki.pl/articles/2082604.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
silver nanoparticles
antimicrobial effect
healthpromoting
bacteria
polyhydric alcohols
packaging
Opis:
In the present study, the effectiveness of a mixture of silver nanoparticles with polyhydric alcohols (glycerol, erythritol, mannitol and xylitol) against six species of healthpromoting bacteria have been examined. Synthesis of silver nanoparticles was carried out using trisodium citrate as the reducing and stabilizing agent. The nanoparticles were characterized by electronic absorption, scanning electron microscopy and powder X-ray diffraction measurements. Electronic absorption spectrum revealed high uniform of synthesized nanoparticles. Practically no aggregation was observed when nanoparticles were mixed with polyhydric alcohols, suggesting weak interaction between ingredients of the mixture. Spherical silver nanoparticles, as depicted by scanning electron microscopy, were found to have diameters in the range of 10 to 30 nm; mean diameter was 18 ± 4 nm. The X-ray diffraction pattern of the prepared samples indicated the face-centred cubic crystalline structure of the metallic silver nanoparticles. In biological study, quite interesting protective effect of polyalcohols on the growth inhibition of health-promoting bacteria by silver nanoparticles was observed. The most substantial protective effect of the tested silver nanoparticles-polyalcohol mixtures was estimated for B. bifidum, L. paraplantarum, and L. phamnosus species.
Źródło:
International Agrophysics; 2019, 33, 4; 473-480
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FEM study of a steel corrugated web plate girder subjected to fire
Autorzy:
Sokołowski, D.
Kamiński, M.
Powiązania:
https://bibliotekanauki.pl/articles/1839880.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
konstrukcja stalowa
symulacja pożaru
metoda elementów skończonych
steel structures
finite element method
corrugated web plate girders
fire simulation
Opis:
The main aim of this work is a computational nonlinear analysis of a high strength steel corrugated-web plate girder with a very detailed and realistic mesh including vertical ribs, all the fillet welds and supporting areas. The analysis is carried out to verify mechanical structural response under transient fire temperature conditions accounting for an efficiency and accuracy of three various transient coupled thermo-elastic models. All the resulting stress distributions, deformation modes and their time variations, critical loads and eigenfrequencies as well as failure times are compared in all these models. Nonlinearities include material, geometrical and contact phenomena up to the temperature fluctuations together with temperature-dependent constitutive relations for high strength steel. They result partially from steady state and transient experimental tests or from the additional designing rules included in Eurocodes. A fire scenario includes an application of the normative fire gas temperature curve on the bottom flange of the entire girder for a period of 180 minutes. It is computed using sequentially coupled thermo-elastic Finite Element Method analyses. These account for heat conductivity, radiation and convection. The FEM model consists of a combination of 3D hexahedral and tetrahedral solid finite elements and uses temperature-dependent material and physical parameters, whose values are taken after the experiments presented in Eurocodes. Numerical results presented here demonstrate a fundamental role of the lower flange in carrying fire loads according to this scenario and show a contribution of the ribs and of the welds to the strength of the entire structure.
Źródło:
International Journal of Applied Mechanics and Engineering; 2021, 26, 2; 201-218
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Association between SOX5 genotypes and semen quality in Polish Holstein-Friesian bulls
Autorzy:
Hering, D.M.
Kaminski, S.
Powiązania:
https://bibliotekanauki.pl/articles/32539.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of this study was to evaluate the effect of C/T missense mutation (SOX5) gene on selected parameters of non-frozen semen in Polish Holstein – Friesian bulls. Three hundred and sixty eight bulls were genotyped by the PCR-Rsa I technique. Semen was collected and evaluated by standardized procedure used in an AI station. Significant associations were found between SOX5 genotypes and sperm concentrations (p=0.020) and sperm motility (p=0.014). Bulls with TT genotype had the lowest values of both traits. Our results demonstrate that C/T missense mutation within the SOX5 gene is involved in bull sperm quality.
Źródło:
Polish Journal of Veterinary Sciences; 2016, 19, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of dynamic parameters of the selected components within digitally controlled hydraulic system
Autorzy:
Kamiński, M.
Szlagowski, J.
Dąbrowski, D.
Powiązania:
https://bibliotekanauki.pl/articles/950156.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
mobile hydraulics
proportional directional control valve
hydraulic cylinder control
electro-hydraulic pilot valve
hydraulic system modelling
hydraulika mobilna
sterowanie siłownikiem hydraulicznym
elektrohydrauliczny zawór pilotowy
modelowanie układu hydraulicznego
Opis:
Dynamic parameters characterizing proportional hydraulic components are essential factors affecting the performance of the construction machinery automatic control system. Knowledge of these parameters is inevitable in modelling the automatically controlled hydraulic power systems as well as designing and analysing the control algorithms. This article presents a methodology of assessing the dynamic parameters of selected components being part of digitally controlled hydraulic power system. The analysed system comprised a typical for mobile hydraulics applications PVG32 proportional directional control valve (DCV) and a variable displacement piston pump. The control system utilised an MC088 PLC controller with specifically prepared and configured software. The measuring system was based on CANbus, which, combined with the PLC used, allowed for flexible configuration of the sensor variables and logging both analogue and digital signals. Among others, the DCV characteristics, the response to step and sinusoidal inputs and DCV hysteresis were examined. The goal was to gather the data required for system modelling and to assess the importance and influence of the investigated parameters onto the model being created.
Źródło:
Journal of KONES; 2018, 25, 1; 205-214
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser cladding by tru laser cell of SSAB BORON B27 STEEL applied in agriculture
Napawanie laserem tru laser cell stali SSAB BORON B27 stosowanej w rolnictwie
Autorzy:
Kapcińska-Popowska, D.
Gościański, M.
Piasecki, M.
Kamiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/334882.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
laser cladding
microstructure
microhardness
SSAB BORON B27 steel
napawanie laserowe
mikrostruktura
mikrotwardość
stal SSAB BORON B27
Opis:
The article presents the effect of conventional heat treatment applied after overlaying welding with laser on properties of SSAB BORON B27 STEEL used in agriculture. In order to select the optimum parameters of laser processing and heat treatment for the best tribological properties of strength microhardness tests were carried out as well as observation of microstructures.
W artykule przedstawiono wpływ konwencjonalnej obróbki cieplnej zastosowanej po napawaniu laserowym na właściwości stali SSAB BORON B27 stosowanej w rolnictwie. W celu wytypowania optymalnych parametrów obróbki laserowej i cieplnej dla uzyskania najlepszych właściwości tribologicznych i wytrzymałościowych przeprowadzono badania mikrotwardości oraz obserwację mikrostruktur.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2017, 62, 1; 74-77
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Missense mutation within cystic fibrosis transmembrane conductance regulator (CFTR) gene is associated with selected parameters of the frozen-thawed spermin Holstein-Friesian bulls
Autorzy:
Kaminski, S.
Hering, D.M.
Kordan, W.
Lecewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2087549.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bull
sperm
polymorphism
CFTR gene
antioxidant enzyme activity
Źródło:
Polish Journal of Veterinary Sciences; 2019, 2; 221-225
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single nucleotide polymorphism within arylsulfatase D gene (ARSD) is associated with selected kinematic parameters of sperm motility in Holstein-Friesian bulls
Autorzy:
Hering, D.
Lecewicz, M.
Kordan, W.
Kaminski, S.
Powiązania:
https://bibliotekanauki.pl/articles/30896.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of the study was to find out whether the single nucleotide polymorphism (SNP) within arylsulfatase D (ARSD) gene is associated with kinematic parameters of sperm motility in Holstein- Friesian bulls. 367 Holstein-Friesian bulls kept in one AI center were included in the study. Point mutation C/T at position 139037255 on chromosome X (rs42207167) was identified by PCR-RFLP method (Pflm I). Significant associations were found between ARSD genotypes and CASA-derived sperm motility parameters: average TM (Total Motility), average VSL (Straight Velocity), average VCL (Curvilinear Velocity) and for fraction of sperms showing progressive motility (a) of sperms (VSLa, VCLa and BCFa -Beat Cross Frequency). Most significant differences were observed between alternative homozygotes (CC vs TT). Our results suggest new role of arylsulfatase D gene as being involved in sperm motility.
Źródło:
Polish Journal of Veterinary Sciences; 2014, 17, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected qualitative and biochemical parameters of cryopreserved semen of Holstein-Friesian (HF) AI bulls
Autorzy:
Lecewicz, M.
Hering, D.M.
Kaminski, S.
Majewska, A.
Kordan, W.
Powiązania:
https://bibliotekanauki.pl/articles/31350.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Selected qualitative and biochemical parameters were determined in cryopreserved semen used for artificial insemination, sampled from 120 bulls reared at the Animal Breeding and Insemination Center in Bydgoszcz. The total average motility of the analyzed sperm samples was determined at 62.51%. The percentage of motile spermatozoa displaying progressive forward motility was 21.65%. Analyzed samples were characterized by a high percentage of sperm cells with a intact plasma membrane (71.21%) and active mitochondria (71.32%). High efficiency of the enzymatic antioxidant system of the evaluated sperm cells was demonstrated by high activity of CAT, GPx and SOD (494.37, 2847.83 and 5.31U/1x109 spermatozoa, respectively) values and low values of the DNA Fragmentation Index (9.32). The results of the study, obtained with the involvement of advanced analytical methods, indicate a high fertilizing capability of the analyzed sperm samples.
Źródło:
Polish Journal of Veterinary Sciences; 2015, 18, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of splicing mutation within the lysophosphatidic acid receptor 1 gene (LPAR1) on semen quality in Holstein-Friesian bulls
Autorzy:
Kamiński, S.
Hering, D.M.
Kordan, W.
Lecewicz, M.
Sazanov, A.
Powiązania:
https://bibliotekanauki.pl/articles/2087732.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bull
sperm
quality
LPAR1
polymorphism
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 2; 419-421
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Screening of Polish Holstein-Friesian bulls towards eradication of Complex Vertebral Malformation (CVM) carriers
Autorzy:
Rusc, A.
Hering, D.
Puckowska, P.
Barcewicz, M.
Kaminski, S.
Powiązania:
https://bibliotekanauki.pl/articles/32473.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The effectiveness of a program aimed at eradicating carriers of the recessive disorder Complex Vertebral Malformation (CVM) from the population of Holstein-Friesian bulls is reported. Among 1823 bulls, 1268 young and 555 proven bulls were examined. Three hundred and three bulls appeared to be CVM carriers (16.62%). The highest number of carriers occurred in the sons of a CVM sire, 55.51% and 61.90%, for proven and young bulls, respectively. This very high incidence of CVM carriers forced us to implement a strategy of screening young bulls offered by individual breeders to insemination centers. In effect, the number of CVM carriers dramatically dropped among proven bulls born in 2004 and disappeared in bulls born in 2006.
Źródło:
Polish Journal of Veterinary Sciences; 2013, 16, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New insight into organic anion transporters from the perspective of potentially important interactions and drugs toxicity
Autorzy:
Mor, A.L.
Kaminski, T.W.
Karbowska, M.
Pawlak, D.
Powiązania:
https://bibliotekanauki.pl/articles/70038.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
organic anion transporter
transmembrane transporter
drug-drug interaction
central nervous system
glycosylation
herbal preparation
dietary supplement
pharmacokinetic interaction
Źródło:
Journal of Physiology and Pharmacology; 2018, 69, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of the state space of management process in the industry applying expert systems
Analiza zastosowania systemu eksperckiego w sterowaniu procesami produkcyjnymi
Autorzy:
Ivanova, I. D.
Sergutenko, A. V.
Kamiński, J. R.
Kuboń, M.
Powiązania:
https://bibliotekanauki.pl/articles/93413.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
expert system
analysis
process
production
stability
system ekspercki
analiza
proces
produkcja
stabilność
Opis:
The article includes analysis of expert system application possibilities in the environment of production processes control. Such concepts as artificial intelligence, expert system, intellectual factor, state space were used. The object of the research consisted of the mechanism of controlling an enterprise (manager). These mechanisms were analysed from the point of view of state space. The graph method was used to visualize information presentation. Analysis of control processes of an enterprise was carried out by determination of their state space. The concept of state space itself is completed with numerous measurement values (parameters) under influence of which the process of task solution takes place. Moreover, the concept of static and dynamic elements of state space of the control system is applied. It was shown that dynamic elements enable the quality presentation of space, which without including other restrictions leads to extension of its impact, which confirms that a given system has an intelligent factor.
W artykule przeprowadzono analizę możliwości zastosowania systemów eksperckich, w takim środowisku, jak sterowanie procesami produkcyjnymi. Wykorzystano terminy: sztuczna inteligencja, system ekspercki, czynnik intelektualny, przestrzeń stabilności. Obiektem badań były mechanizmy sterowania przedsiębiorstwem (menażerstwa). Mechanizmy te analizowano z punktu widzenia stabilności przestrzennej. W artykule wykorzystano metodę grafów w celu wizualnego przedstawienia informacji. Przeprowadzono analizę procesów sterujących przedsiębiorstwem drogą wyznaczenia ich przestrzeni stabilności. Sam termin przestrzeń stabilności uzupełniany jest licznymi wielkościami pomiarowymi (parametrami), pod wpływem których zachodzi proces rozwiązania zadania. Także stosowane jest pojęcie statycznych i dynamicznych składowych przestrzeni stabilności systemu sterowania. Pokazano, że składowe dynamiczne umożliwiają jakościowe przedstawienie przestrzeni, które przy nie uwzględnianiu innych ograniczeń prowadzi do rozszerzenia swego oddziaływania, co utwierdza o posiadaniu przez dany system inteligentnego czynnika.
Źródło:
Agricultural Engineering; 2017, 21, 2; 81-90
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Image Processing Methods for Diagnostic and Simulation Applications in Cardiology
Autorzy:
Skurski, A.
Borzęcki, M.
Balcerzak, B.
Kamiński, M.
Napieralski, A.
Kasprzak, J. D.
Lipiec, P.
Powiązania:
https://bibliotekanauki.pl/articles/397963.pdf
Data publikacji:
2012
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
kardiologia
echokardiografia
ECHO
przetwarzanie obrazów
symulacja
USG
cardiology
echocardiography
image processing
simulation
Opis:
The paper describes two particular applications of image processing for the purpose of analysis and simulation in the field of cardiology. The authors describe a method which allows for combining the 2D image obtained in ECHO examination, and a 3D model of heart, extracted from a set of CT slices. The fused image provides an intuitive view on the contractual function of heart, by overlaying the bull's eye diagram on the model of left ventricle. By preserving the spatial information, it is possible to accurately point the location of areas with impaired contractual function. Another method described by the authors, displays the use of the CT volume for simulation of echocardiography images for purpose of training application. A simple approach based on pixel brightness adaptation is used to provide images of sufficient training quality. At the same time authors highlight the issues of storage and run-time memory requirement of such application, and suggest a method of reducing the working set size.
Źródło:
International Journal of Microelectronics and Computer Science; 2012, 3, 4; 146-151
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of impact force reduction by polymer materials used for mouthguard fabrication
Autorzy:
Gawlak, D.
Mańka-Malara, K.
Mierzwińska-Nastalska, E.
Gieleta, R.
Kamiński, T.
Łuniewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/306696.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sport
uzębienie
urazy szczęki
ochraniacze wewnątrzustne
teeth trauma
mouthguards
oro-facial injury
Opis:
Purpose: The essential function of mouthguards is protection against the effects of injuries sustained during sports activities. This purpose will be successfully achieved if appropriate materials ensuring sufficient reduction of the injury force are used for mouthguard fabrication. Objective: The objective of the study was to investigate the force reduction capability of selected materials as well as to identify which material reduces the impact force to the highest degree. Methods: The material for the study were samples of polymers (6 samples in total), obtained during the process of deep pressing (2 samples), flasking (3 samples) and thermal injection (1 sample), which were tested for impact force damping using an impact device – Charpy impact hammer. The control group comprised of the ceramic material samples subjected to the hammer impact. The statistical analysis applied in this study were one-way Welch ANOVA with post-hoc Games-Howell pairwise comparisons. Results: The test materials reduced the impact force of the impact hammer to varying degrees. The greatest damping capability was demonstrated for the following materials: Impak with 1:1 powder-to-liquid weight ratio polymerized with the conventional flasking technique, and Corflex Orthodontic used in the thermal injection technique of mouthguard fabrication. Conclusions: Impak with 1:1 weight ratio and Corflex Orthodontic should be recommended for the fabrication of mouthguards since they demonstrated the most advantageous damping properties.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 1; 89-95
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

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