Autor: Góra, P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Differential entropy: continuity properties and applications to nonsingular Endomorphisms
Autorzy:: Góra, P.
Powiązania:: https://bibliotekanauki.pl/articles/745369.pdf
Data publikacji:: 1990
Wydawca:: Polskie Towarzystwo Matematyczne
Opis:: The article contains no abstract
Źródło:: Commentationes Mathematicae; 1990, 29, 2
0373-8299
Pojawia się w:: Commentationes Mathematicae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Magnetoelectric Effect of a Ni0.3Zn0.62Cu0.08Fe2O4 - PbFe0.5Nb0.5O3 Multilayer Composite
Efekt magnetoelektryczny w warstwowym kompozycie Ni0.3Zn0.62Cu0.08Fe2O4 - PbFe0.5Nb0.5O3
Autorzy:: Guzdek, P.
Sikora, M.
Góra, Ł.
Kapusta, Cz.
Powiązania:: https://bibliotekanauki.pl/articles/354839.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: tape casting
multilayer composite
magnetic properties
magnetoelectric effect
odlewanie taśmy
kompozyt warstwowy
własności magnetyczne
efekt magnetoelektryczny
Opis:: The magnetoelectric effect in multiferroic materials has been widely studied for its fundamental interest and practical applications. The magnetoelectric effect observed for single phase materials like Cr₂O₃, BiFeO₃, and Pb(Fe_0.5Nb_0.5)O₃ is usually small. A much larger effect can be obtained in composites consisting of magnetostrictive and piezoelectric phases. This paper investigates the magnetoelectric effect of a multilayer (laminated) structure consisting of 6 nickel ferrite and 7 PFN relaxor layers. It describes the synthesis and tape casting process for Ni_0.3Zn_0.5Cu_0.08Fe₂O₄ ferrite and relaxor PbFe_0.5Nb_0.5O₃ (PFN). Magnetic hysteresis, ZFC - FC curves and dependencies of magnetization versus temperature for PFN relaxor and magnetoelectric composite were measured with a vibrating sample magnetometer (VSM) in an applied magnetic field up to 85 kOe at a temperature range of 10 – 400 K. Magnetoelectric effect at room temperature was investigated as a function of a static magnetic field (0.3 - 6.5 kOe) and the frequency of sinusoidal magnetic field (0.01 - 6.5 kHz). At lower magnetic field, the magnetoelectric coefficient increases slightly before reaching a maximum and then decreases. The magnetoelectric coefficient aME increases continuously as the frequency is raised, although this increase is less pronounced in the 1-6.5 kHz range. Maximum values of the magnetoelectric coefficient attained for the layered composites exceed about 50 mV/(Oe cm).
Materiały kompozytowe wykazujące efekt magnetoelektryczny są obecnie szeroko badane zarówno dla celów poznawczych jak i aplikacyjnych. Szczególny nacisk kładzie się na kompozyty ferrytowo – relaksorowe, w których efekt magnetoelektryczny jest znacznie większy niż w materiałach jednofazowych. W opracowaniu przedstawiono technologię wytwarzania wielowarstwowego kompozytu ceramicznego składającego się z magnetycznych warstw ferrytu Ni_0.3Zn_0.62Cu_0.08Fe₂O₄ rozdzielonych warstwami ferroelektryka PbFe_0.5Nb_0.5O₃. Przedstawiono wyniki badań właściwości magnetycznych otrzymanego kompozytu. Badania te przeprowadzono przy użyciu magnetometru wibracyjnego w szerokim zakresie temperatur (10K- 400K) w polu magnetycznym dochodzącym do 85 kOe. Wykonano pomiary efektu magnetoelektrycznego w temperaturze pokojowej w zależności od częstotliwości zmiennego pola magnetycznego (0.01 - 6.5 kHz) oraz natężenia stałego pola magnetycznego (0.3 - 6.5 kOe). Współczynnik magnetoelektryczny najpierw rośnie, osiąga maksimum a następnie lekko maleje ze wzrostem natężenia stałego pola magnetycznego. Współczynnik magnetoelektryczny badanego kompozytu rośnie ze wzrostem częstotliwości sinusoidalnego zmiennego pola magnetycznego osiągając maksymalną wartość około 50 mV/(Oe cm).
Źródło:: Archives of Metallurgy and Materials; 2014, 59, 3; 1011-1015
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Relative quantification of CYP1A gene expression in whitefish (Coregonus lavaretus) exposed to benzo[a]pyrene
Autorzy:: Brzuzan, P.
Jurczyk, Ł.
Łuczyński, M. K.
Góra, M.
Powiązania:: https://bibliotekanauki.pl/articles/363188.pdf
Data publikacji:: 2005
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: ekspresja genu CYP1A
sieja
benzo(a)piren
real-time PCR
benzo(a)pyrene
Coregonus lavaretus
CYP1A gene expression
RealTime PCR
relative quantification
Opis:: The expression of CYP1A (cytochrome P4501A) can be induced by a number of aromatic compounds in teleost fishes. We developed a real-time PCR assay for measuring relative quantities (RQ) of CYP1A mRNA in whitefish (Coregonus lavaretus). To test for the usefulness of the assay we performed a treatment study, using benzo[a]pyrene (B[a]P) a model CYP1A inducer. Primers for the CYP1A gene were adapted from the literature, whereas those for [beta]-actin (endogenous control) were designed from a region that was found to be conserved among salmonid [beta]-actin genes. A group of hatchery raised whitefish, with an average body mass of 15 g and total length of 12 cm were given an intraperitoneal injection (10 mg/kg) of B[a]P in corn oil (2 mg B[a]P/ml corn oil) or corn oil alone (Control). After 48 h, whitefish liver, head kidney and brains were collected for mRNA isolation and analysis. In all three tissues sampled, CYP1A mRNA was affected by treatment with B[a]P. Head kidney tissue showed the greatest induction potential (RQ=11.00) from base levels (RQ=1.00), followed by liver (RQ=9.45), and brain (RQ=3.76). These results demonstrated that CYP1A was highly inducible by B[a]P in whitefish head kidney and liver, and to some extent, in brain tissue. The approach presented here has the advantage of providing rapid and accurate measures of CYP1A induction in various tissues of fish responding to PAH contaminant exposure.
Źródło:: Environmental Biotechnology; 2005, 1, 1; 11-15
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: CYP1A gene expression in adipose fin of rainbow trout (Oncorhynchus mykiss Walbaum) exposed to benzo[a]pyrene
Autorzy:: Brzuzan, P.
Woźny, M.
Łuczyński, M. K.
Góra, M.
Powiązania:: https://bibliotekanauki.pl/articles/363276.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: płetwa tłuszczowa
benzo(a)piren
CYP1A mRNA
skrzela
pstrąg tęczowy
real-time PCR
adipose fin
benzo(a)pyrene
gill
rainbow trout
Real-Time PCR
Opis:: Proximate to the environment, adipose fin of fish may be considered as a lipid storing tissue, and thus can be a target for either waterborne or dietary polycyclic aromatic compounds (PACs). We determined the effects of benzo[a]pyrene (B[a]P), a model PAC member, on CYP1A gene expression in adipose fin and compared that with the effects in gill of juvenile rainbow trout (Oncorhynchus mykiss Walbaum) using the quantitative reverse transcription polymerase chain reaction (Q-RT-PCR). The results of the study demonstrated that constitutive CYP1A mRNA was present in adipose fin of rainbow trout, but the transcripts were far less abundant than those in gill tissue. We confirmed high CYP1A gene induction potential of the gills in rainbow trout injected with benzo[a]pyrene, but also showed moderately and transiently induced CYP1A mRNA in adipose fin. The modest and transitory gene expression may preclude rainbow trout adipose fin CYP1A mRNA levels from using it as an indicator of sustained exposure of fish to the polycyclic aromatic compounds.
Źródło:: Environmental Biotechnology; 2007, 3, 1; 20-24
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Benzo[a]pyrene and cyclopenta[c]phenanthrene suppress expression of p53 in head kidney of rainbow trout
Autorzy:: Brzuzan, P.
Woźny, M.
Góra, M.
Łuczyński, M. K.
Jabłońska, A.
Powiązania:: https://bibliotekanauki.pl/articles/363082.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: B[a]P
CP[c]Ph
ekspresja genów
hnRNA
pstrąg tęczowy
poziom transkrypcji
gene expression
rainbow trout
transcription rate
Opis:: Although p53, a protein of important tumor suppressive function, has been extensively studied in mammals, relatively little is known about the p53 pathways in lower vertebrates. Particularly, limited information exists on possible influences of environmental contaminants on the expression of the p53 gene in fish. In the current study, we assessed the effects of benzo[a]pyrene (B[a]P; potent tumor promoter) and cyclopenta[c]phenanthrene (CP[c]Ph; clastogenic agent) exposure on a 24h profile of p53 gene expression in head kidney of juvenile rainbow trout (Oncorhynchus mykiss). To analyze the p53 transcription rate, we developed protocol for the examination of both mRNA and heterogeneous nuclear (hn) RNA of the gene, using Real-Time RTPCR approach. The results show that both compounds are capable of suppressing p53 transcriptional activity within 12h of the treatment. Our finding supports the idea that structurally different PAHs may influence cell physiologic functions controlled by p53 in fish, in part, by down-regulating its RNA expression levels.
Źródło:: Environmental Biotechnology; 2011, 7, 1; 41-45
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Preliminary evaluation of ER- and AhR-mediated gene expression patterns in rainbow trout (Oncorhynchus mykiss) liver after short-term exposure to zearalenone in binary mixtures
Autorzy:: Woźny, M.
Brzuzan, P.
Wolińska, L.
Góra, M.
Łuczyński, M. K.
Powiązania:: https://bibliotekanauki.pl/articles/363144.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: receptor AhR
benzo(a)piren
ścieżka sygnałowa
17beta-estradiol
receptor estrogenowy
zearalenone
aryl hydrocarbon receptor
benzo(a)pyrene
crosstalk
estrogen receptor
Opis:: While estrogenic properties of mycotoxin zearalenone (ZEA) has been an extensively studied issue, little is known about molecular background of its biological responses that cannot be simply explained by the estrogenic potential. The present study describes effects of ZEA (10mg*kg-1 body weight) in binary mixtures either with benzo[a]pyrene (B[a]P), or with 17β-estradiol (E2) on ER- and AhR-dependent gene expression in juvenile rainbow trout liver, evaluated using Real-Time qPCR. The study revealed dual nature of ZEA, as the treatment with this compound alone increased mRNA levels of both ER- and AhR-mediated gene expression. However, our results did not show any synergistic or additive effect of ZEA in binary mixures with E2 or B[a]P on studied gene expression levels. Whether the intriguing potential of ZEA to elicit distinct signals was a result of binding affinity to AhR or/and ER and AhR mutual receptor interactions, should be investigated in further experiments.
Źródło:: Environmental Biotechnology; 2010, 6, 1; 16-23
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Preliminary evaluation of mutagenic activity of two amino derivatives of cyclopenta[c]phenanthrene
Autorzy:: Łuczyński, M. K.
Góra, M.
Mielżyńska, D.
Brzuzan, P.
Tejs, S.
Pirogowicz, P.
Luczynski, M.
Powiązania:: https://bibliotekanauki.pl/articles/363278.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: test Amesa
fenantren
mutacje DNA
WWA
Ames test
phenanthrene
DNA mutations
PAHs
Opis:: The mutagenicity of two, newly synthesized amino-derivatives of cyclopenta[c]phenanthrene (CP[c]Ph) was investigated in the Ames test using TA98 and TA100 histidine dependent Salmonella typhimurium strains. Neither of the examined compounds showed mutagenic activity without metabolic activation. The incorporation of an activation system caused high mutagenicity of CP[c]Ph derivatives in both S. typhimurium strains. The results are compared with the previous data on the mutagenic activity of unsubstituted CP[c]Ph and possible mechanisms of activation are discussed.
Źródło:: Environmental Biotechnology; 2007, 3, 1; 15-19
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Emission Measurements of Geogenic Greenhouse Gases in the Area of “Pusty Las” Abandoned Oilfield (Polish Outer Carpathians)
Autorzy:: Guzy, P.
Pietrzycki, D.
Świerczewska, A.
Sechman, H.
Twaróg, A.
Góra, A.
Powiązania:: https://bibliotekanauki.pl/articles/124987.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: greenhouse gas
methane
carbon dioxide
Outer Carpathians
Opis:: The Carpathians may play a significant role as a supplier of greenhouse gases to the atmosphere. Unfortunately, most of the discovered oil and gas deposits are recently only historical objects. An example is the Sękowa-Ropica Górna-Siary oil deposit located in the marginal part of the Magura Nappe where oil had been extracted in dug wells until the mid XX century. One of such extraction sites is the “Pusty Las” oilfield. In that area, 10 methane and carbon dioxide emission measurement sites were located, among which 4 in dried dug wells and 6 in dig wells still filled with oil and/or water. Dynamics of methane and carbon dioxide concentration changes were measured with the modified static chambers method. Gas samples were collected immediately after the installation of the chamber and again, after 5 and 10 minutes. In the case of reclaimed or dry dug wells, static chamber was installed directly at the ground surface. In wells still filled with oil and/or water the chamber was equipped with an “apron” mounted on special sticks. The dynamics of concentrations changes varied from -0.871 to 119.924 ppm∙min^-1 for methane and from -0.005 to 0.053% obj∙min^-1 for carbon dioxide. Average methane emission was 1.9 g∙m^-2∙d^{-¹ and that of carbon dioxide was 26.95 g∙^-2∙d^{-¹. The measurements revealed that an abandoned oil field supplies significant amounts of greenhouse gases to the atmosphere although the emission of methane is lower than that measured e.g. in mud volcanoes located in various parts of the world.}}
Źródło:: Journal of Ecological Engineering; 2017, 18, 4; 100-109
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Preliminary study on adverse effects of phenanthrene and its methyl and phenyl derivatives in larval zebrafish, Danio rerio
Autorzy:: Wolińska, L.
Brzuzan, P.
Woźny, M.
Góra, M.
Łuczyński, M. K.
Podlasz, P.
Kolwicz, S.
Piasecka, A.
Powiązania:: https://bibliotekanauki.pl/articles/363152.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: toksyczność ostra
CYP1A
cyp1b1
geny vtg
ekspresja mRNA
stężenie nie wywołujące efektu
WWA
Real-Time qPCR
acute toxicity
cyp1a genes
cyp1b1 genes
vtg genes
mRNA expression
No Effect Concentration
PAHs
Opis:: Toxic effects of polycyclic aromatic hydrocarbons (PAHs) have been extensively studied in fish, although knowledge concerning biological activities of phenanthrene and its derivatives remains still incomplete. The aim of this work was to evaluate lethal and sublethal effects of benzo(a)pyrene, phenanthrene and phenanthrene derivatives (1-methylphenanthrene, 4-methylphenanthrene, 1-phenylphenanthrene and 4-phenylphenanthrene) on zebrafish (Danio rerio) larvae. We conducted acute toxicity test, using 96h static renewal exposure to a series of the PAH concentrations (0.05, 0.50, 5.00, 50.00µmol*l-1), to determine the No Effect Concentration (NEC) value for each compound examined. The mean NEC estimates obtained in the study were 5.16۪.45µmol*l-1 (B[a]P), 4.88۪.13µmol*l-1 (Ph), 40.24䔰.93µmol*l-1 (1P-Ph), 47.92ۭ.61µmol*l-1 (1M-Ph), 24.31۱.33µmol*l-1 (4P-Ph) and 3.11۫.01µmol*l-1 (4M-Ph) and suggested the following order of PAH toxicities on Danio rerio larvae: 4M-Ph>Ph˜B[a]P>4PPhP-Ph>1M-Ph. To gain insight into possible molecular mechanisms of apparent toxicity of phenanthrene derivatives on zebrafish larvae, we examined mRNA expression of cyp1a, cyp1b1, and vtg genes in the larvae exposed for 48h to a PAH concentration of 0.50µmol*l-1. Whereas the larvae exposed to each tested PAH displayed many developmental abnormalities (i.e. pericardial and yolk sac edema, dorsal curvature, or tail malformations), no significant upregulation of cyp1a and cyp1b1 mRNA was observed, except for zebrafish exposed to B[a]P. However, significant reduction of vtg mRNA was observed in the larvae exposed to phenanthrene and its 4P- derivative. The results may contribute to the development of a new knowledge about effects of structurally diverse phenanthrene derivatives on vertebrate organisms.
Źródło:: Environmental Biotechnology; 2011, 7, 1; 26-33
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Cyclopenta[c]phenanthrene induction of CYP1A in brain of rainbow trout (Oncorhynchus mykiss)
Autorzy:: Brzuzan, P.
Woźny, M.
Łuczyński, M. K.
Góra, M.
Ciesielski, S.
Kuźmiński, H.
Powiązania:: https://bibliotekanauki.pl/articles/363272.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: benzo(a)piren
mózg
CYP1A
cyklopenta[c]fenantren
absolutna kwantyfikacja mRNA
pstrąg tęczowy
benzo(a)pyrene
brain
cyclopenta[c]phenanthrene
mRNA absolute quantification
rainbow trout
Opis:: We assessed the effects of cyclopenta[c]phenanthrene (CP[c]Ph) and benzo[a]pyrene (B[a]P; positive control) on CYP1A gene expression in brain of juvenile rainbow trout (Oncorhynchus mykiss) using the quantitative reverse transcription polymerase chain reaction (Q-RT-PCR). A group of hatchery raised rainbow trout, with an average body mass of 49.4 g and total length of 15.5 cm were given an intraperitoneal injection (10 mg*kg-1) of either CP[c]Ph or B[a]P in corn oil (2 mg*mi-1 corn oil) or corn oil alone (control). After 24 and 48 h, trout brains were collected for mRNA isolation and analysis. After 24 hours of the exposure, only B[a]P-treated rainbow trout had 10-fold higher number of CYP1A transcripts (mean = 3.63*106 transcripts*µg-1 total RNA) than control fish (3.24*105 transcripts*µg-1 total RNA; Tukey test, P<0.05). After 48 hrs, significantly higher levels of CYP1A expression (Tukey test, P<0.001) were found in either CP[c]Ph- or B[a]P- induced group (1.45*106 and 6.92*106 transcriptsźµg-1 total RNA, respectively) over a control group (mean=1.41*105 transcripts*µg-1 total RNA). The finding that CYP1A in brain tissue was inducible by CP[c]Ph, a polycyclic aromatic hydrocarbon (PAH) of different than B[a]P planar characteristics, may further validate the use of rainbow trout brain CYP1A mRNA levels as a biomarker of PAH exposure.
Źródło:: Environmental Biotechnology; 2007, 3, 1; 10-14
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: The influence of gender, dominant lower limb and type of target on the velocity of taekwon-do front kick
Autorzy:: Wąsik, J.
Ortenburger, D.
Góra, T.
Shan, G.
Mosler, D.
Wodarski, P.
Michnik, R. A.
Powiązania:: https://bibliotekanauki.pl/articles/306521.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: interakcja
analiza czynnikowa
szybkość
dokładność
interaction
kicking speed
kicking accuracy
factorial analysis
Opis:: Purpose: The current study aimed to quantify the main influences and the interactions (joint effects) of gender, leg and type of target on the biomechanics of front kick quality. Through the quantification, we tried to identify the relevant factors related to the kick accuracy and maximum velocity for coaching practice. Methods: A ten-camera NIR VICON MX40 motion capture system (250 Hz) was used to determine the kicking foot maximum velocity from two well-trained subject groups (8 males and 6 females). Each subject performed both left and right front kicks in a lateral standing position into the air (without a physical target), to a board, to a table tennis ball and to a training shield. The target were set on a height corresponding to a height of solar plexus of each participant. Results: The results showed that all the three factors (gender, leg and type of target) have significant influences on kicking speed ( p < 0.001) and significant interaction (joint effect) was only found between gender and target ( p < 0.001). Further analysis revealed that the males’ kicking maximum velocity was affected more by board, while females’ one was affected by the size of the target. Conclusions: The results would seem to suggest that, for males, kick-to-a-board may be the more effective method for increasing kick quality, compared to other type of target. For females, kick-to-a-small-ball appears to be effective method for increasing kick maximum velocity.
Źródło:: Acta of Bioengineering and Biomechanics; 2018, 20, 2; 133-138
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: New slow-release fertilizers - economic, legal and practical aspects: a Review
Autorzy:: Wesołowska, M.
Rymarczyk, J.
Góra, R.
Baranowski, P.
Sławiński, C.
Klimczyk, M.
Supryn, G.
Schimmelpfennig, L.
Powiązania:: https://bibliotekanauki.pl/articles/2083050.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: slow-release and controlled-release fertilizers
national emission ceilings directive
greenhouse gas emissions
NH3 emisions
Opis:: The improper adjustment of the release characteristics of commonly used mineral fertilizers to the nutritional requirements of plants results in the loss of a significant part of them by infiltration into the soil profile or in the form of greenhouse gas emissions into the atmosphere. Legal regulations including the national emission ceilings directive, require the Member States of European Union to limit ammonia emissions from agriculture. In order to minimize the losses of valuable nutrients and to reduce greenhouse gas emissions it is necessary to find new solutions and technologies in agriculture. Specialists emphasize the beneficial effects of localized fertilization methods and the use of the slow-release/controlled-release fertilizers. Field studies conducted on newly obtained fertilizers prove their beneficial effect on the quality and quantity of the crop but currently the products offered on the market are too expensive to use in large acreage crops. This article presents an overview of some particular economic, legal and practical aspects of slow-release fertilizer production and use. Additionally, the results of field tests indicating their beneficial effect on plant yield, the plant response to stressful conditions and methods for environmental protection are also presented.
Źródło:: International Agrophysics; 2021, 35, 1; 11-24
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Ambient dose equivalent measurements in secondary radiation fi elds at proton therapy facility CCB IFJ PAN in Krakow using recombination chambers
Autorzy:: Jakubowska, E. A.
Gryziński, M. A.
Golnik, N.
Tulik, P.
Stolarczyk, L.
Horwacik, T.
Zbroja, K.
Góra, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/147396.pdf
Data publikacji:: 2016
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: recombination chambers
workplace monitoring
proton therapy
Opis:: This work presents recombination methods used for secondary radiation measurements at the Facility for Proton Radiotherapy of Eye Cancer at the Institute for Nuclear Physics, IFJ, in Krakow (Poland). The measurements of H*(10) were performed, with REM-2 tissue equivalent chamber in two halls of cyclotrons AIC-144 and Proteus C-235 and in the corridors close to treatment rooms. The measurements were completed by determination of gamma radiation component, using a hydrogen-free recombination chamber. The results were compared with the measurements using rem meter types FHT 762 (WENDI-II) and NM2 FHT 192 gamma probe and with stationary dosimetric system.
Źródło:: Nukleonika; 2016, 61, 1; 23-28
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: MicroRNA expression profiles in liver and colon of sexually immature gilts after exposure to Fusarium mycotoxins
Autorzy:: Brzuzan, P.
Wozny, M.
Wolinska-Niziol, L.
Piasecka, A.
Florczyk, M.
Jakimiuk, E.
Gora, M.
Luczynski, M.K.
Gajecki, M.
Powiązania:: https://bibliotekanauki.pl/articles/2087983.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: To improve our knowledge of the role of microRNAs (miRs) in responses of the porcine digestive system to two Fusarium mycotoxins, zearalenone (ZEN) and deoxynivalenol (DON), we examined the expression of 7 miRs (miR-9, miR-15a, miR-21, miR-34a, miR-122, miR-125b, and miR-192), previously found to be deregulated in diseased liver and colon cells. In this study, immature gilts were exposed to NOEL doses of ZEN (40 |ig/kg/d), DON (12 |ig/kg/d), ZEN+DON (40 + 12 |ig/kg/d), and placebo (negative control group) for 7,14, 21, 28, 35, and 42 days. Before the treatment, expression levels of the selected miRs were measured in the liver, the duodenum, the jejunum, and the ascending and the descending colon of the gilts. Hierarchical clustering of the tissues by their miR expression profiles was consistent with what would be expected based on the anatomical locations and the physiological functions of the organs, suggesting that functions of the miRs are related to the specificities of the tissues in which they are expressed. A subset of 2 pairs of miRs (miR-21+miR-192 and miR-15a+miR-34a), which were assigned to two distinct clusters based on their tissue abundance, was then evaluated in the liver and the ascending and the descending colon during the treatment. The most meaningful results were obtained from the ascending colon, where a significant effect of the treatment was observed, suggesting that during the exposure to mycotoxins, the pathways involved in cell proliferation and survival were disordered. Changes in miR expression in the liver and the descending colon of the treated gilts were smaller, and were associated more with treatment duration than the exposure to ZEN, DON, or ZEN+DON. Further research should focus on identification of genes whose expression is regulated by these aberrantly expressed miRs. This should facilitate understanding of the miRNA-regulated biological effects of mycotoxins.
Źródło:: Polish Journal of Veterinary Sciences; 2015, 18, 1
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki