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Tytuł:
Początki i rozwój badań radiacyjnych w IBJ na Żeraniu
Beginnings and the development of radiation research at the Institute of Nuclear Research INR, Zeran
Autorzy:
Stachowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/214185.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
badania radiacyjne
badania poznawcze
badania aplikacyjne
badania wdrożeniowe
radiation research
basic research
applied research
implemented research
Opis:
W artykule opisano początki chemii radiacyjnej w IBJ, w tym pierwsze źródła promieniowania, pierwsze badania napromieniowanych związków nieorganicznych i organicznych. Omówiono instalację komercyjnego źródła promieniowania i liniowego akceleratora elektronów oraz rozszerzony w związku z tym program badań. Prace poznawcze obejmowały badanie roztworów soli nieorganicznych i węglowodorów alifatycznych, a oparte były na technice radiolizy impulsowej i wykorzystaniu niskich temperatur (ciekły azot, ciekły hel). Zostały rozwinięte oparte na technice EPR badania sterylizowanych radiacyjnie przeszczepów kostnych. Wdrożono sterylizację radiacyjną sprzętu medycznego oraz prowadzono badanie napromieniowanych polimerów, w tym szczepienie folii monomerami, sieciowanie i degradację. Efektem tych prac było wdrożenie i uruchomienie produkcji rur i taśm termokurczliwych.
First step in radiation chemistry including construction of home-made Co-60 irradiation sources and the preliminary experiments on inorganic and organic systems are described. Installation of commercial Co-60 irradiator and linear electron accelerator followed by extended research program is discussed. Basic studies were focused on liquid solutions of inorganic salts and aliphatic hydrocarbon based on pulse radiolysis and low temperature irradiations (liquid nitrogen and helium). The EPR study on radiation sterilization of bone grafts was developed. Radiation sterilization of medical devices was implanted while polymer study i.e. radiation induced grafting of foils with monomers, cross-linking and degradation of irradiated polymers were extensively studied resulting in the implementation and further production of shrinkable tubes and tapes.
Źródło:
Postępy Techniki Jądrowej; 2015, 3; 29-33
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identyfikacja napromieniowania produktów spożywczych w IChTJ
Autorzy:
Stachowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/214490.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
identyfikacja napromieniowania
produkty spożywcze
napromieniowanie żywności
Źródło:
Postępy Techniki Jądrowej; 2013, 2; 20-21
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability of light-stimulated photoluminescence (PSL) in detection of irradiated food comparison with thermoluminescence method (TL)
Autorzy:
Guzik, G. P.
Stachowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/147688.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
irradiation
detection
food products
spices
herbs
blends
photostimulated luminescence (PPSL)
thermoluminescence (TL)
Opis:
The detection of irradiation of several classes of food products with the use of thermoluminescence (TL) and photostimulated luminescence (PPSL) has been proceeded. The comparison of the results obtained by both methods has been done and reliability of the PPSL method as compared with the TL method evaluated. Conclusion concerning the usefulness of such evaluation to the practice has been drawn.
Źródło:
Nukleonika; 2008, 53, suppl. 1; 25-29
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of irradiated components in flavour blends composed of non-irradiated spices, herbs and vegetable seasonings by thermoluminescence method
Autorzy:
Malec-Czechowska, K.
Stachowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/148473.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
detection
irradiated foods
blends
thermoluminescence
Opis:
The results of experiments on the detection of irradiated component in commercial flavour blends composed of a mixture of non-irradiated spices, herbs and seasonings are presented. A method based on the thermoluminescence measurements on silicate minerals isolated from blends has been adapted. It has been proved that by applying this technique it is possible to detect 0.05% by weight of paprika, irradiated earlier with a dose of 7 kGy, which was a minor component of nonirradiated flavour blends.
Źródło:
Nukleonika; 2003, 48, 3; 127-132
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on radiation-induced radicals giving rise to stable EPR signal suitable for the detection of irradiation in L-sorbose-containing fruits
Autorzy:
Guzik, G. P.
Stachowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/146498.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
sorbose
crystallite
electron paramagnetic resonance (EPR)
EPR
irradiation
Opis:
The stable and complex EPR signals produced by the action of ionizing radiation on crystalline L-sorbose (C6H12O6) separated from rowan berries (Sorbus aucuparia) were studied. Isothermal heating of the samples at the temperature close to the melting point of L-sorbose (140°C) results in the modification and simplification of the EPR signal involved. In the EPR signal of heated L-sorbose, the isotropic quartet was distinguished. In the differential spectrum obtained by subtraction of normalized spectra of unheated and heated L-sorbose, the isotropic doublet was identified in addition. The DFT fitting offers the probable assignment of the EPR signals to specifi c radical structures.
Źródło:
Nukleonika; 2016, 61, 4; 461-465
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on organic radicals giving rise to multicomponent EMR spectra in dried fruits expose to ionizing radiation II. D-Glucose
Autorzy:
Guzik, G. P.
Stachowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/147173.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
dried fruits
electron magnetic resonance (EMR)
irradiation
glucose
organic radicals
Opis:
Crystalline D-glucose extracted from dried resins was irradiated with 60Co gamma rays. The multicomponent EMR spectra of the samples kept at ambient temperature were compared with those heated at 105°C – the temperature close to the melting point of glucose. Normalized EMR spectra recorded with both samples were subtracted, resulting in a differential EMR spectrum. Spectral analysis of all three spectra has been done resulting in the identification of isotropic doublet of doublets assigned to less stable radical derived from parent glucose molecule.
Źródło:
Nukleonika; 2013, 58, 3; 425-428
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EPR study on sugar radicals utilized for detection of radiation treatment of food
Autorzy:
Guzik, G. P.
Stachowicz, W.
Michalik, J.
Powiązania:
https://bibliotekanauki.pl/articles/146706.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
density functional theory (DFT)
dried fruits
electron paramagnetic resonance (EPR)
irradiation
mannose
sorbose
Opis:
Radicals produced by ionizing radiation in sugars, the components of dried and raw fruits give rise to stable multicomponent electron paramagnetic resonance (EPR) signals unidentified so far. The subject of the present EPR study is to identify the radicals stabilized in gamma-irradiated crystalline sugars, D(+)mannose and L(-)sorbose extracted from cranberries (Vaccininum oxycoccos) and rowan berries (Sorbus aucuparia), respectively. EPR measurements and density functional theory (DFT) simulations were employed for that purpose.
Źródło:
Nukleonika; 2012, 57, 4; 545-549
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on stable radicals produced by ionizing radiation in dried fruits and related sugars by electron paramagnetic resonance spectrometry and photostimulated luminescence method – I. D-fructose
Autorzy:
Guzik, G. P.
Stachowicz, W.
Michalik, J.
Powiązania:
https://bibliotekanauki.pl/articles/147212.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
fructose
PPSL
EPR
irradiation
detection
food products
Opis:
Stability of sugar born radicals separated from irradiated Iranian dried raisins and from D-fructose by Sigma Aldrich has been studied at room temperature by EPR and PPSL methods in a period of 360 days. It has been proven for the first time experimentally that the complex EPR spectrum of irradiated sugars is changed in time and after heating. Hence, this made it possible to distinguish spectral lines of two specific radicals contributing to the formation of multicomponent spectra, recorded in both time dependent and heating experiments. The radicals measured by EPR and energy traps detected by PPSL decay at room temperature in a similar way, suggesting a similar distribution of both species in sugar crystallites. We think that our experimental approach might be useful to study interrelation between the formation and trapping of radicals and energy accumulated in crystalline matrices. In order to achieve the isolation of individual sugars from fruits the extraction and specific separation procedures have been adapted with the use of methanol, ethanol and water solvents. Our results clearly show that radicals induced by radiation in fruits (with fructose born radicals as major constituent) are stable enough at room temperature for easy identification of irradiated raisins using the EPR method.
Źródło:
Nukleonika; 2008, 53, suppl. 2; 89-94
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of irradiated dried fruits using EPR spectroscopy
Autorzy:
Guzik, G. P.
Stachowicz, W.
Michalik, J.
Powiązania:
https://bibliotekanauki.pl/articles/148844.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
dried fruits
electron paramagnetic resonance (EPR)
fructose
glucose
irradiation
Opis:
The dominating carbohydrates in fruits are monosaccharides like fructose, glucose, sorbose and mannose. In dehydrated fruits, concentration of monosaccharides is higher than in fresh fruits resulting in the formation of sugar crystallites. In most of dried fruits, crystalline fructose, and glucose dominate and appear in proportion near to 1:1. Irradiation of dried fruits stimulates radiation chemical processes resulting in the formation of new chemical products and free radicals giving rise to multicomponent EPR signal which can be detected for a long period of time. For that reason, it is used as a marker for the detection of radiation treatment of dried fruits. It has been found that EPR spectra recorded in dried banana, pineapple, papaya, and fig samples resemble the EPR spectrum obtained by computer addition of fructose and glucose spectra taken in proportion 1:1. The decay of radiation induced EPR signals proceeds in dried fruits fast during the first month of observation and becomes much slower and almost negligible after prolonged storage. However, it remains intense enough for EPR detection even one year after processing. The radiation induced EPR signal is easily detected in dried fruits exposed to 0.5 kGy of gamma rays. Thus, the EPR method of the detection of irradiated fruits can be used for the control of dried fruits undergoing quarantine treatment with 200–300 Gy of ionizing radiation.
Źródło:
Nukleonika; 2015, 60, No. 3, part 2; 627-631
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of radiation treatment of dry plant extracts by thermoluminescence and pulsed photostimulated luminescence. Comparative study
Autorzy:
Lehner, K.
Malec-Czechowska, K.
Stachowicz, W.
Guzik, G.
Powiązania:
https://bibliotekanauki.pl/articles/148034.pdf
Data publikacji:
2009
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
plant extract
detection
irradiation
thermoluminescence
photostimulated luminescence
Opis:
Results of the examination of the variety of dry plant extracts (Thyme extract, Celery seed extract, Artichoke extract, Citrus aurantium extract and others) by two different detection methods are described. Both PSL and TL methods are presented and discussed. Comparative study based on the analysis of the results obtained by thermoluminescence (TL) and photostimulated luminescence (PSL) measurements delivered the arguments that preselection of detection methods based on model studies is rational to be adapted in analytical laboratories specialized in the detection of irradiated foods.
Źródło:
Nukleonika; 2009, 54, 2; 99-105
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nutrition habits and frequency of consumption of selected food products by the residents of urban and rural area from the Subcarpathian voivodeship
Autorzy:
Szalajko, M.
Stachowicz, W.
Dobosz, M.
Szalankiewicz, M.
Sokal, A.
Luszczki, E.
Powiązania:
https://bibliotekanauki.pl/articles/2086666.pdf
Data publikacji:
2021
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
eating habits
food consumption frequency
socio-demographic conditions
village
city
adults
Opis:
Background. The dynamic development and change of rural lifestyle patterns towards urban patterns has been noticeable since the second half of the 20th century. Nutrition, as well as the lifestyle in urban and rural areas, has undergone a process of urbanization, which is evidenced by the following an increasing number of overweight people. Objective. The aim of the study was to compare eating habits and frequency of consumption of selected groups of products between the urban and rural residents from the Subcarpathian voivodeship. Material and methods. The survey was carried out on a sample of 279 persons from urban and rural areas of Subcarpathian voivodeship. In this study, the diagnostic survey method consisting of 3 (different) parts was used. To check the significance of differences, U Mann-Whitney and Kruskal-Wallis tests were used; whereas correlations between variables were determined by the Spearman's rank of correlation coefficient and Pearson's chi-quadrat test. Results. In the part concerning eating habits, statistically significant differences occurred among others; for the circumstances of eating meals, the most commonly consumed snacks, food processing techniques and the most frequently selected fat. In the part concerning the frequency of consumption of individual product groups, significant differences occurred among others; for dairy products, grain products, fast food, alcohol. There was a correlation between the frequency of consumption of individual products and socioeconomic status. Conclusions. The quality of the diet and eating habits of urban and rural residents of Subcarpathian voivodeship does not differ significantly. The detected differences in eating habits were more influenced by the education and socioeconomic status of the examined group than the place of residence.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2021, 72, 2; 165-174
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EPR study on biominerals as materials for retrospective dosimetry
Autorzy:
Sadło, J.
Michalik, J.
Stachowicz, W.
Strzelczak, G.
Dziedzic-Gocławska, A.
Ostrowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/146095.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
dosimetry
EPR dating
accidental dosimetry
hydroxyapatite
Opis:
Stable paramagnetic species, induced by irradiation in biominerals, can be successfully used as an EPR dosimeter in numerous domains of scientific activity. In hydroxyapatite, the main mineral component of bones, the most stable signal is assigned to CO2 - ion radical. The signal is dose dependent and allows to determine the absorbed dose in a wide range till 20 kGy, with detection limit for tooth enamel below 1 Gy. The additive dose method was applied to EPR dating of archeological objects and EPR dosimetry after accidental overexposing during radiotherapy. It was found that the age of remains excavated from the “tomb of giants” belonging to Nuraghic culture developed in Sardinia island is about 3160 years old (1160 years BC). The dose obtained by patients during the accident at the Białystok Oncological Center was evaluated at about 75 Gy. Searching for potential dosimeters among other biominerals shows that mollusc shells have very promising properties. The lowest dose detection limit was found for an Arcidae shell. Both fresh water and sea mollusc shells are useful to be used for dosimetry in the low dose range.
Źródło:
Nukleonika; 2006, 51,suppl.1; 95-100
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corporate social responsibility and corporate social irresponsibility
Autorzy:
Stachowicz-Stanusch, A.
Amann, W.
Powiązania:
https://bibliotekanauki.pl/articles/392749.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
CSR
CSI
business ethics
organizational behavior
etyka biznesu
zachowania organizacyjne
Opis:
Expectations for contemporary corporations include not only their conduct in accordance with law and standards but also their social responsibility. However, even incorporation of CSR concept into strategy does not guarantee the absence of socially irresponsible practices. This paper presents a comparison of these two concepts – corporate social responsibility and corporate social irrespinsibility (CSI) – and explains why they are not simply opposing approaches.
Źródło:
Organizacja i Zarządzanie : kwartalnik naukowy; 2017, 4; 107-115
1899-6116
Pojawia się w:
Organizacja i Zarządzanie : kwartalnik naukowy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Viral nature of corruption in a world of business and academia
Autorzy:
Amann, W.
Stachowicz-Stanusch, A.
Powiązania:
https://bibliotekanauki.pl/articles/392978.pdf
Data publikacji:
2018
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
corruption in academia
corruption in business
corruption as a virus
integrity
transparency
korupcja na uczelni
korupcja w biznesie
korupcja jako wirus
integralność
przezroczystość
Opis:
Disruptive force of corruption and its ability to spread away like a virus is globally known and commonly understood. However, as one can notice while observing both business an academic life, this knowledge and understanding does not prevent corruptive activities from occurring. This paper aims to shed a light on viral nature of corruption and its influence on integrity in the academic community by presenting a particular set of academic community’s behaviors that are destructive for its integrity as well as by presenting a universal set of instruments and methods for preventing both the higher education sector as well as business sector from corruption diffusion.
Źródło:
Organizacja i Zarządzanie : kwartalnik naukowy; 2018, 4; 13-25
1899-6116
Pojawia się w:
Organizacja i Zarządzanie : kwartalnik naukowy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Artificial intelligence at universities in Poland
Autorzy:
Stachowicz-Stanusch, A.
Amann, W.
Powiązania:
https://bibliotekanauki.pl/articles/392992.pdf
Data publikacji:
2018
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
artificial intelligence
chatbot
intelligent tutoring system
sztuczna inteligencja
wirtualny asystent
inteligentny system nauczania
Opis:
Artificial intelligence (AI) technologies are one of top investment priorities in these days. They are aimed at finding applications in fields of special value for humans, including education. Chatbots are one of those AI-driven solutions that support learning and teaching processes also in higher education institutions. In this paper there are presented two cases of chatbot technology implementation at Polish universities. Chatbots develop students’ technical and programming skills, but also provide the possibility of gaining linguistic expertise. However, a chatbot’s teaching mastery depends also on its users. That is why it is important to get students to truly understand AI systems and feel responsible for the conversation. But above all, we should ensure that chatbots respect human and civil rights.
Źródło:
Organizacja i Zarządzanie : kwartalnik naukowy; 2018, 2; 65-82
1899-6116
Pojawia się w:
Organizacja i Zarządzanie : kwartalnik naukowy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 27

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