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Wyświetlanie 1-15 z 79
Tytuł:
Zakażenia wirusem grypy ptaków u kotów – nowa choroba zakaźna zwierząt w Polsce
Avian influenza virus infections in cats – new infectious animal disease in Poland
Autorzy:
Adaszek, Ł.
Domańska-Blicharz, K.
Janczak, D.
Pisarek, M.
Rypuła, K.
Płoneczka-Janeczko, K.
Skrzypczak, M.
Ziętek, J.
Winiarczyk, S.
Powiązania:
https://bibliotekanauki.pl/articles/28763103.pdf
Data publikacji:
2023
Wydawca:
Krajowa Izba Lekarsko-Weterynaryjna
Tematy:
koty
choroby zwierzat
choroby zakazne
wysoce zjadliwa grypa ptakow
wirus H5N1
infekcja wirusowa
sytuacja epizootyczna
patogeneza
objawy kliniczne
rozpoznanie
leczenie
Źródło:
Życie Weterynaryjne; 2023, 98, 09; 548-551
0137-6810
Pojawia się w:
Życie Weterynaryjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation and Characterization of a Novel Hyperbranched Polyester Polymers Using A2+B3 Monomers
Autorzy:
Al-Mutairi, Nabeel Hasan
Al-Zubiedy, Ali
Al-Zuhairi, Ali J
Powiązania:
https://bibliotekanauki.pl/articles/26081324.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
hiperrozgałęziony poliester HBP
monomer A2+B3
polycondensation
1H-NMR
GPC
hyperbranched polyester HBP
A2+B3 monomer
Opis:
Compared to linear analogs, hyperbranched polymers (HBPs) have gotten much attention in the last decade because of their intrinsic globular topologies and distinctive features like low viscosity, high solubility, and a high degree of functionality. In this work, four types of hyperbranched polyester polymer HBPs have been synthesized using the A2+B3 polycondensation methodology. Firstly, the starting material B3 monomer (Pyrimidine-2,4,6-triol) has been synthesized using urea and malonic acid with the presence of sodium Na as the catalyst for the reaction. Secondly, four types of materials (tartaric acid TA, adipic acid AD, maleic acid MA, and phthalic anhydride PA) as A2 monomers were added to the starting material B3 monomer in an oil bath to prepare the four types of HBP. The chemical structure of HBPs was characterized by FTIR, and 1H-NMR. The molecular weight of the prepared HBPs was characterized by gel permeation chromatography GPC, and thermal properties were characterized by differential scanning calorimetry DSC and thermal gravimetric analysis TGA. FTIR results showed that there are new bands, such as C-O-C between A2 and B3 monomers, as indicated by 1H-NMR. In addition, GPC shows that the prepared polymers have a narrow molecular weight distribution with good thermal stability, as indicated by DSC and TGA.
Źródło:
Production Engineering Archives; 2023, 29, 1; 28--36
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
1H-Benzimidazole derivatives as mammalian DNA topoisomerase I inhibitors
Autorzy:
Alpan, A
Gunes, H
Topcu, Zeki
Powiązania:
https://bibliotekanauki.pl/articles/1040939.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
1H-benzimidazole derivatives
type I DNA topoisomerase
plasmid supercoil relaxation assays
Opis:
Benzimidazole is one of the most important heterocyclic groups manifesting various biological properties, such as antibacterial, antifungal, antimicrobial, antiprotozoal and antihelmintic activities. Several benzimidazole derivatives are also active as inhibitors of type I DNA topoisomerases. In this study, three 1H-benzimidazole derivatives with different electronic characteristics at position 5-, namely 5-chloro-4-(1H-benzimidazole-2-yl)phenol (Cpd I), 5-methyl-4-(1H-benzimidazole-2-yl)phenol (Cpd II) and 4-(1H-benzimidazole-2-yl)phenol (Cpd III), were synthesized and evaluated for their effects on mammalian type I DNA topoisomerase activity using quantitative in vitro plasmid supercoil relaxation assays. For the structure elucidation of the compounds, melting points, UV, IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses were interpreted. Among the compounds, 5-methyl-4-(1H-benzimidazole-2-yl)phenol (Cpd II) manifested relatively potent topoisomerase I inhibition.
Źródło:
Acta Biochimica Polonica; 2007, 54, 3; 561-565
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-tumor agents: Design, Synthesis, and Biological study of N-Substituted-7-hydroxy-1-azacoumarin-3-carboxamide derivatives as potent cytotoxic agents
Autorzy:
Bakare, Safyah B.
Powiązania:
https://bibliotekanauki.pl/articles/1849341.pdf
Data publikacji:
2021
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
azacoumarin-3-carboxamide
cytotoxicity
1H
13C-NMR
spectraMCF-7
Opis:
Synthesis of ethyl 7-hydroxy-1-azacoumarin-3-carboxylate (3) was developed using ethyl-7-hydroxy coumarin-3-carboxylate and ammonium solution as the key synthons. Condensation of ethyl 7-hydroxy-1-azacoumarin-3-carboxylate with ammonium acetate and aniline to give N-substituted-7-hydroxy-1-azacoumarin-3-carboxamides (7-Hydroxy -1-azacoumarin-3-carboxamide (4) and N-phenyl 7-Hydroxy-1-azacoumarin-3-carboxamide (5)). Bromo derivative (N-phenyl 6, 8-dibromo-7-hydroxy-1-azacoumarin-3-carboxamide (6)) was obtained from halogenation of compound N-phenyl 7-Hydroxy-1-azacoumarin-3-carboxamide (5) with bromine in glacial acetic acid. N-phenyl-2,5-diacetoxy-6, 8-disubstituted-Quinoline-3-carboxamides (N-phenyl 2,7-diacetoxy-Quinoline-3-carboxamide (7) and N-phenyl 2,7-diacetoxy-6,8-dibromo-Quinoline-3-carboxamide (8)) were prepared via the acetylation of compounds 5 and 6 with acetic anhydride. Five compounds 4–8 were evaluated in vitro against more than one human tumor cell lines. Among the selected compounds, 6 showed the best in vitro cytotoxicity against the human cancer cell line; MCF-7 (with IC50 = 10.12 μM). In addition, cell cycle analysis of compound 6 demonstrated cell cycle arrest at G2/M phase and Pre-G1 apoptosis.
Źródło:
Polish Journal of Chemical Technology; 2021, 23, 1; 53-59
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and anticancer evaluation of some coumarin and azacoumarin derivatives
Autorzy:
Bakare, Safyah B.
Powiązania:
https://bibliotekanauki.pl/articles/1849302.pdf
Data publikacji:
2021
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Coumarin
azacoumarin
1H-NMR spectrum
13C-NMR spectrum
anticancer
Opis:
Coumarin and its nitrogen analogue 1-aza coumarin are a class of lactones and lactams, respectively, which are indispensable heterocyclic units to both chemists and biochemists. 1-Aza coumarin derivatives, which ultimately metabolize as the corresponding 8-hydroxy coumarins in the biological system are therefore found to be very good anti-inflammatory, anti-cancer, and analgesic agents. A series of hybrid substituted coumarin and azacoumarin-3-carboxylic acid derivatives (8-methoxycoumarin-3-carboxylic acid (4a), 8-methoxyazacoumarin-3-carboxylic acid (4b), 5-bromo-8-methoxycoumarin-3-carboxylic acid (5a), 5-bromo-8-methoxyazacoumarin-3-carboxylic acid (5b), 2-acetoxy-5-bromo-8-methoxyquinoline-3-carboxylic acid (6), and 5,7-di(phenylazo)-8-methoxycoumarin-3-carboxylic acid (7) were synthesized and structurally proved using spectral and elemental analysis data. Substituted coumarin-3-carboxylic acid (4a and 5a) and Substituted azacoumarin-3-carboxylic acid (4b, 5b and 6) were tested for their in vitro cytotoxic activity against MCF-7 and HepG-2 cell lines.
Źródło:
Polish Journal of Chemical Technology; 2021, 23, 2; 27-34
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of a wide spectrum of inherited metabolic disorders by 13C NMR spectroscopy
Autorzy:
Bal, Dominika
Kraska-Dziadecka, Anna
Gradowska, Wanda
Gryff-Keller, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1040823.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
urine
13C NMR
inherited metabolic disease
1H NMR
marker metabolite
Opis:
High-resolution 1H NMR spectroscopy of body fluids has proved to be very useful in diagnostics of inherited metabolic diseases, whereas 13C NMR remains almost unexploited. In this paper the application of 13C NMR spectroscopy of fivefold concentrated urine samples for diagnosis of selected metabolic diseases is reported. Various marker metabolites were identified in test urine samples from 33 patients suffering from 10 different diseases, providing information which could be crucial for their diagnoses. Spectra were accumulated for 2 h or overnight when using spectrometers operating at 9.4 or 4.7 T magnetic fields, respectively. Interpretation of the measurement results was based on a comparison of the peak positions in the measured spectrum with reference data. The paper contains a table with 13C NMR chemical shifts of 73 standard compounds. The method can be applied individually or as an auxiliary technique to 1H NMR or any other analytical method.
Źródło:
Acta Biochimica Polonica; 2008, 55, 1; 107-118
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The "H5N1 publication case" and its conclusions
Autorzy:
Becker, Gregor
Powiązania:
https://bibliotekanauki.pl/articles/1039726.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
ethics
science
H5N1
NSABB
dual use research
Opis:
The request of the National Science Advisory Board for Biosecurity (NSABB) to the editors of the scientific journals SCIENCE and NATURE not to publish details on the modified H5N1-virus has surprisingly not caused a discussion on censorship within the scientific community (NSABB, 2012a, P.1). This may show that science generally acknowledges the necessity to cut out sensitive data from research results in publications that may serve as a manual for weapons of mass destruction. In this article the policy of the NSABB and the reaction of the scientific community is discussed, as well as the meaning of censorship in dual use research and how an appropriate organisation of future surveillance in sensitive science fields could be organised: To guarantee future undisturbed work in sensitive science fields, the establishment of an internationally organised frame for scientists dealing with dual-use-research is suggested.
Źródło:
Acta Biochimica Polonica; 2012, 59, 3; 441-443
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and effects of substituent on (E)-styryl-3-methyl-2-thienyl chalcones
Autorzy:
Christuraj, P.
Geetha, C.
Vanangamudi, G.
Arulkumaran, R.
Manikandan, V.
Rajakumar, P. R.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/1161056.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
(E)-3-(3-methylthiophen-2-yl)-1-phenylprop-2-en-1-ones
FT-IR & NMR spectra
Fly-ash:H3PO4 nanocatalyst
Hammett correlation analysis
Substituent effects
UV
solvent-free synthesis
Opis:
Series of eleven substituted of (E)-3-(3-methylthiophen-2-yl)-1-phenylprop-2-en-1-ones compounds by cross-aldol condensation reaction of 3-methylthiophene-2-carbaldehyde with various substituted acetaldehyde in the occurrence of Fly-Ash: H3PO4 catalyst. The effect of catalytic activity of this fly-ash:H3PO4 nanocatalyst was studied with the obtained yield of products under solvent-free conditions. The synthesized substituted (E)-3-(3-methylthiophen-2-yl)-1-phenylprop-2-en-1-one compounds was characterized by physical constants, UV, FT-IR, 1H & 13C-NMR spectral data. The infrared group frequencies of ʋ(cm-1) of COs-cis & s-trans, CHip and CHop, CH=CHop, >C=C
Źródło:
World Scientific News; 2018, 112; 55-73
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości i zastosowanie pochodnych 2H-1-benzopiran-2-onu jako związków pochodzenia naturalnego
Spectroscopic properties and applications of 2H-benzopyran-2-one derivatives as a compound of natural background
Autorzy:
Czarna, M.
Kamińska, I.
Ortyl, J.
Powiązania:
https://bibliotekanauki.pl/articles/134833.pdf
Data publikacji:
2015
Wydawca:
ADVSEO
Tematy:
kumaryna
2H-1-benzopiran-2-on
furanokumaryny
piranokumaryna
coumarin
2H-1-benzopyran-2-one
furanocoumarins
pyranocoumarin
Opis:
This article is a detailed literature overview about properties and wide application of coumarin derivatives, whose representative is 2H-1-benzopyran-2-one. It turns out that this compounds can be found in many places all around the world. Huge part of them is already isolated and synthesized in laboratory conditions, however there are assumptions that many of them are not known at all and they might have an influence on science development. Considering to the structural variety of coumarin, its derivatives are characterized by different properties, what reflects numerous possibilities of their application and also attracts the interest of the world of science.
Źródło:
Technical Issues; 2015, 3; 11-17
2392-3954
Pojawia się w:
Technical Issues
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phenobarbital-induced expression of cytochrome P450 genes.
Autorzy:
Czekaj, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1044233.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
CYP2B
cytochrome P450
phenobarbital-responsive enhancer unit
CYP2H1.
orphan receptors
CYP3A
PXR
CAR
phenobarbital
Opis:
In contrast to the well-known Ah receptor-mediated regulation of the CYP1A1 gene by polycyclic aromatic hydrocarbons, the molecular mechanism by which phenobarbital (PB) and PB-like inducers affect transcription of CYP genes remains unknown; no receptor for these chemicals has been found to date. However, in the last 5 years PB-responsive sequences have been identified in the 5' flanking regions of several P450 genes. The phenobarbital-responsive enhancer unit (PBRU) of CYP2B gene family members contain two potential nuclear receptor binding sites (NR1 and NR2) that flank a nuclear factor 1 (NF-1) binding motif. The nuclear factors that regulate PBRU activity have not yet been characterized. It seems that PB may activate multiple nuclear orphan receptors to induce various CYP genes. CYP2B and CYP3A genes appear to be targets for the orphan receptors CAR and PXR, respectively. It is also possible that the pleiotropic effects of PB can, in part, be explained by the ability of the CAR-RXR heterodimer to bind to a variety of nuclear receptor binding motifs. The induction of cytochromes P450 may result in interactions between xenobiotics and in the interference of xenobiotic metabolism and endogenous signalling pathways.
Źródło:
Acta Biochimica Polonica; 2000, 47, 4; 1093-1105
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synteza niektórych azotowych układów hetero cyklicznych oraz ich zastosowanie w komórkach elektroluminescencyjnych
Synthesis of some heterocyclic compounds and application thereof inelectroluminescent cells
Autorzy:
Daniel, A.
Daniel, K.
Powiązania:
https://bibliotekanauki.pl/articles/1287264.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
komórki elektroluminescencyjne
1H-pirazolo[3,4-b]chinoksaliny
1H-pirazolo[3,4-b]chinoliny
bis-pirazolo[3,4-b; 4',3'-e]pirydyny
electroluminescent devices
bis-pyrazolo[3,4-b;4',3'-e]pyridines
1H-pyrazolo[3,4-b]quinolines
1H-pyrazolo[3,4-b]quinoxalines
Opis:
W pracy omówiono syntezę i zastosowanie układów heterocyklicznych, pochodnych 1H-pirazolo[3,4-b]chinolin, 1H-pirazolo[3,4-b]chinoksalin, bis-pirazolo[3,4-b;4',3'-e]pirydyn oraz benzoksazoli w postaci prostych molekuł, oligomerów i polimerów dla urządzeń elektroluminescencyjnych. Zbudowano jedno- lub wielowarstwowe komórki (filmy osadzane próżniowo lub nanoszone za pomocą techniki spin-coating) oraz zbadano ich podstawowe charakterystyki. Uzyskane komórki emitowały światło niebieskie i zielone.
Some nitrogen heterocycles such as 1H-pyrazolo[3,4-b]quinolines, 1H-pyrazolo[3,4-b]quinoxalines, bis-pyrazolo[3,4-b; 4',3'-e]pyridines and benzoxazoles were synthesized. Multilayer devices were fabricated using these dyes. The films were vacuum evaporated or spin-coated from solutions. The devices provided a bright blue, blue-green or green emission.
Źródło:
Chemik; 2010, 64, 7-8; 511-522
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acetylation of methyl 5-amino-1H-[1,2,4]triazole-3-carboxylate
Autorzy:
Dżygiel, Anetta
MAsiukiewicz, Elżbieta
Rzeszotarska, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/1044073.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
hetareneamino acid
5-amino-1H-[1,2,4]triazole-3-carboxylate
Opis:
Acetylation with acetic anhydride of methyl 5-amino-1H-[1,2,4]triazole-3-carboxylate, one of the hetareneamino acids, was studied using HPLC,1H NMR, FTIR and GC-MS. The compound has a significantly decreased susceptibility to acetylation compared to 5-amino-1H-[1,2,4]triazole itself. Two isomeric diacetylated products were found.
Źródło:
Acta Biochimica Polonica; 2001, 48, 4; 1169-1173
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Obraz metaboliczny guzów mózgu w protonowej spektroskopii MR (1HMRS)
Metabolic image of braintumors in proton MR spectroscopy (1HMRS)
Autorzy:
Flaga, G.
Powiązania:
https://bibliotekanauki.pl/articles/112269.pdf
Data publikacji:
2018
Wydawca:
Indygo Zahir Media
Tematy:
protonowa spektroskopia rezonansu magnetycznego
guzy mózgu
1H MRS
magnetic resonance proton spectroscopy
brain tumors
Opis:
Wstęp. Protonowa spektroskopia MR (1HMRS) to wyspecjalizowana technika, która w bezinwazyjny sposób dostarcza informacji na temat składu biochemicznego tkanek. Dzięki niej można określić charakter zmian, które są niejednoznaczne po wykonaniu konwencjonalnego badania TK lub MR. Cel. Celem badania jest identyfikacja charakterystycznego dla guzów mózgu widma 1HMRS. Materiał i metody. Analizowano dane z badań 1HMRS 30 pacjentów (15 kobiet i 15 mężczyzn) w wieku od 18 do 76 lat (średnia 56,7 lat) wykonanych przy pomocy systemu MR 1,5 T. U wszystkich badanych zidentyfikowano obecność zmian ogniskowych w OUN, które okazały się guzami złośliwymi (weryfikacja hist-pat po przebytych operacjach). Sygnały 1HMRS uzyskiwano z obszaru guza, a także z przeciwnej niezmienionej tkanki mózgowej (lokowano tzw. Volume of Interest – VOI). Porównywano poziom względnych stężeń (WSS) następujących metabolitów: NAA/Cr, Cho/Cr, mI/Cr, Lip/Cr i Lac/Cr z obu lokalizacji. Ocenę różnic WSS pomiędzy badanymi grupami (VOI z guza i ze strony przeciwnej) przeprowadzono testem t-Studenta. Jako poziom istotności przyjęto wartość p < 0,05. Wyniki. Stwierdzono istotny statystycznie wzrost wartości WSS Cho/Cr, Lip/Cr i Lac/Cr oraz spadek WSS NAA/Cr w widmie 1HMRS guzów złośliwych mózgu. Wnioski. W widmie 1HMRS złośliwych guzów mózgu stwierdza się istotny statystycznie: wzrost stężenia Cho, wzrost stężenia Lip i Lac oraz spadek stężenia NAA. Stwierdza się również różnice w konfiguracji widma 1HMRS w zależności od stopnia złośliwości guza. W guzach o niskim stopniu złośliwości odnotowano uniesienie piku Cho z obniżeniem piku NAA, natomiast w guzach o wysokim stopniu złośliwości odnotowano obniżenie piku NAA, uniesienie piku Cho oraz bardzo znaczne uniesienie pików Lac i Lip.
introduction. Proton MR spectroscopy (1HMRS) is a specialized technique that provides non-invasive information on the biochemical composition of tissues. Thanks to it, it is possible to determine the nature of changes that are ambiguous after performing a conventional CT or MR examinations. The aim of the study. The aim of the study is to identify the 1HMRS spectrum characteristic for brain tumors. Material and methods. Data from 1HMRS studies were analyzed in 30 patients (15 women and 15 men) aged from 18 to 76; (mean 56.7 years) made using the MR 1.5 T system. All subjects were identified by the presence of focal lesions in the CNS, which turned out to be malignant tumors (histopathic verification after surgery). 1HMRS signals were obtained from the tumor area as well as from the opposite unchanged brain tissue (the so-called Volume of Interest (VOI) was located). The levels of relative ratio of concentrations (RRC) of the following metabolites were compared: NAA/Cr, Cho/Cr, mI/Cr, Lip/Cr and Lac/Cr from both sites. Evaluation of RRC differences between the examined groups (VOI from tumor and from the opposite side) was carried out with the Student’s t-test. The p value was < 0.05 as the significance level. Results. There was a statistically significant increase in RRCCho/Cr, Lip/Cr and Lac/Cr values as well as a decrease in RRC NAA/Cr in the 1HMRS spectrum of brain malignancies. Conclusions. In the 1HMRS spectrum of malignant tumors of the brain, statistically significant is found: increase of Cho concentration, increase of Lip and Lac concentration and decrease of NAA concentration. It is also found differences in the configuration of spectrum 1HMRS depending on the grade of the tumor. In low-grade tumors, the Cho peak with NAA peak reduction was noted, while in the high-grade tumors there was a decrease in NAA peak, Cho peak lift and very high Lac and Lip lift.
Źródło:
Inżynier i Fizyk Medyczny; 2018, 7, 5; 333-337
2300-1410
Pojawia się w:
Inżynier i Fizyk Medyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The In-Depth Stress Distribution for 1H13 Specimen after Cutting
Autorzy:
Gadalińska, E.
Wronicz, W.
Malicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/97885.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
in-depth stress distribution
electropolishing
diffraction methods
1H13 stainless steel
Opis:
Measuring the in-depth stress state is of vital importance for materials scientists. Strain gauges methods are capable of yielding information only about the surface stress state. Diffraction methods using synchrotron or neutron radiation, which allow totally non-destructive stress measurements inside the material, are not widely available. In this context, the best widely available method combines the X-ray diffraction stress measurements and gradual removal of the outer layer by means of electropolishing. Here, this method was applied to the specimen made of 1H13 stainless steel cut with under water on a corundum cut-off wheel. The idea was to investigate how deeply an additional stress state resulting from cutting was introduced and whether the technique of combining of X-ray diffractometry and electropolishing can be used widely for determining the stress state inside the specimen.
Źródło:
Fatigue of Aircraft Structures; 2016, 8; 73-79
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
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