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Wyświetlanie 1-8 z 8
Tytuł:
High Resistivity AlGaAs Grown by Low Temperature MBE
Autorzy:
Radomska, D.
Ratajczak, J.
Regiński, K.
Bugajski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1992076.pdf
Data publikacji:
1998-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.61.Ey
Opis:
Al$\text{}_{0.3}$Ga$\text{}_{0.7}$As layers were grown by molecular beam epitaxy using substrate temperature 200-300°C, tetrameric As and two values of As/Ga+Al flux ratio i.e. 3 or 8. The post-growth annealing was performed in situ at 600°C for 20 min under As-overpressure. The samples were characterised by reflection high-energy electron diffraction, transmission electron microscope and room-temperature I-V measurements of n$\text{}^{+}$/LT grown layer /n$\text{}^{+}$ resistors. The resistivity and trap-filled limited voltage have been determined. The best layers exhibited ρ of the order of 10$\text{}^{9}$ Ω cm, were monocrystalline, uniformly precipitated and without dislocations.
Źródło:
Acta Physica Polonica A; 1998, 94, 3; 492-496
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quasi-Molecule Model of the Spectra of Molecules in Polar Solution in Case of Time Dependent Fluorescence Shifts
Autorzy:
Bączyński, A.
Marszałek, T.
Radomska, D.
Targowski, P.
Ziętek, B.
Powiązania:
https://bibliotekanauki.pl/articles/1920928.pdf
Data publikacji:
1992-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.50.Dq
78.55.Bq
Opis:
Analytical expressions of profiles of absorption and instantaneous fluorescence spectra of dye molecules in polar solvents are given. It is shown what parameters can be gained from electronic spectra of dye solutions. The new procedure of interpretation of transient fluorescence spectra is demonstrated in the case of the spectra of nile blue in alcohol.
Źródło:
Acta Physica Polonica A; 1992, 82, 3; 413-420
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In vivo stimulatory effect of multi-component herbal remedy PADMA 28 on mitogen-induced proliferation of mice splenic lymphocytes and their chemokinetic activity
Autorzy:
Skopinski, P.
Radomska-Lesniewska, D M
Sokolnicka, I
Balan, B J
Siwicki, A K
Skopinska-Rozewska, E.
Powiązania:
https://bibliotekanauki.pl/articles/31452.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
PADMA 28, a natural herbal multi-compound remedy originates from traditional Tibetan medicine and possesses a variety of beneficial effects on experimental and clinical models of inflammation and atherosclerosis, as well as angioprotecive, antioxidative and wound – healing properties. The aim of the present study was to evaluate the in vivo influence of this remedy on the in vitro mitogen-induced proliferation of murine splenic lymphocytes and their chemokinetic activity in cell culture.The study was performed on 6-8 weeks old inbred Balb/c mice. PADMA28 was administered to mice per os in daily doses 5.8 mg (calculated from the highest dose recommended for human) or 0.085 mg (dose from the range of active doses of other herbal extracts containing polyphenolic substances used previously by us in experiments with mice), for 7 days. Control groups received water. Results: No substantial differences were observed between groups of mice fed with low and high PADMA doses. In both of them, response of splenic lymphocztes to mitogen PHA (p < 0.001) and their in vitro chemokinetic activity (p < 0.001 for low dose and p < 0.01 for high dose) were highly significantly increased as compared to the controls. Conclusion: The results of our investigations suggest that PADMA 28 can stimulate cell-mediated immunity in mice and might be used for this purpose in the wide spectrum of doses.
Źródło:
Polish Journal of Veterinary Sciences; 2013, 16, 4
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Copper levels in patients with rheumatoid arthritis
Autorzy:
Strecker, D.
Mierzecki, A.
Radomska, K.
Powiązania:
https://bibliotekanauki.pl/articles/50137.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Tematy:
copper level
patient
human disease
rheumatoid arthritis
ceruloplasmin
inflammation
autoimmune disease
pathogenesis
Opis:
Introduction. Rheumatoid arthritis (RA) is a chronic, autoimmune-based disease of the connective tissue with still unknown etiology. Numerous studies have indicated the association between Copper (Cu) and ceruloplasmin (Cp) concentrations and pathogenesis of RA. Objective. To compare the concentrations of Cu and Cp in different biological samples and their correlation with the inflammatory process, between a group of patients with RA and a control group of healthy individuals. Materials and Methods. The study enrolled 74 Caucasian patients (20 men and 54 women), aged 29–50 (mean age 39.8±6.1 years) diagnosed with RA. The control group consisted of 30 healthy Caucasian individuals. Copper levels were assessed by atomic absorption spectroscopy. Results. Among RA patients the mean Cu level was significantly higher in serum and hair compartments and significantly lower in erythrocytes, compared with the control group (p<0.01). The Cp concentration was also higher in serum of RA patients (p<0.001). A statistically significant, positive correlation between the Cp serum concentration and the ESR values (rs = 0.38; p<0.007) was found. No significant influence of pharmaceutical treatment (methotrexate, non-steroidal anti-inflammatory drugs, glucocorticoids, calcium, vitamin D3 and sulphasalazine) on serum Cu was found. Conclusions. It seems that the ‘copper status’ in patients with RA, based on the measurement of Cu and Cp levels in blood serum is correlated with presence of the inflammatory process. The hair could serve as a useful, additional diagnostic material. Some other factors, different from the applied treatment, can probably influence the Cu levels in patients with RA.
Źródło:
Annals of Agricultural and Environmental Medicine; 2013, 20, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical aspects of casting and their effect on the quality of Remanium CSE dental alloys
Autorzy:
Klimecka-Tatar, D.
Radomska, K.
Pawłowska, G.
Powiązania:
https://bibliotekanauki.pl/articles/111804.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
casting alloy
quality
surface roughness
odlewy ze stopu
jakość
chropowatość powierzchni
Opis:
The study concerns on investigation of Remanium CSE alloy, one of the dental alloys used in metal-ceramic connection preparation. The alloys based on Ni-Cr-Mo are widely used in dental engineering because of their high mechanical, tribological properties as well as high corrosion resistance. The tested alloy has been processed in three ways – it has been remelted and then casted using three technologies commonly used in dental laboratories, i.e. with: oxy-acetylene burner (1), induction furnace (2) and Volts arc (3). The aim of the study was to evaluate the effect of the melting and casting techniques on the mechanical strength and stereometric surface properties. The results revealed that the quality of Remanium CSe dental alloys significantly depend on the method of the material processing.
Źródło:
Production Engineering Archives; 2016, 10, 1; 38-41
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of finishing process on the surface quality of Co-Cr-Mo dental alloys
Autorzy:
Klimecka-Tatar, D.
Radomska, K.
Pawłowska, G.
Powiązania:
https://bibliotekanauki.pl/articles/111889.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
biomedical engineering
surface roughness
casting alloy
quality
inżynieria biomedyczna
chropowatość powierzchni
odlewy ze stopu
Opis:
Preparatory procedures for the material have a significant influence on the surface stereometry of the material. This study investigated the effect of the electropolishing process on the surface quality of metallic prosthetic constructions based on Co-Cr-Mo alloys. It has been found that the process of electropolishing prevents to excessive development of the surface of a material and consequently improves surface quality.
Źródło:
Production Engineering Archives; 2016, 12, 3; 19-21
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physiological-biochemical parameters and characteristics of seed coat structure in lupin seeds subjected to long storage at different temperatures
Autorzy:
Piotrowicz-Cieslak, A I
Michalczyk, D J
Gorska, K
Bulinska-Radomska, Z.
Gorecki, R.J.
Powiązania:
https://bibliotekanauki.pl/articles/58178.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
physiological parameter
biochemical parameter
seed coat
coat structure
lupin
seed
long storage
storage
storability
protein
soluble carbohydrate
seed surface
different temperature
temperature
Opis:
Seed vigour, viability, the contents of soluble carbohydrates, total protein, albumins, and globulins, as well as seed coat structure, were analysed in yellow lupin (Lupinus luteus L.) cv. Iryd seeds stored for 20 years at -14oC, 0oC or at room temperature (approx. +20oC). Seed storage at room temperature reduced viability (to 2%) and increased seed leachate electroconductivity. Determinations of total proteins showed that protein content was significantly reduced in seeds stored at +20oC compared to the other storage regimens. Raffinose family oligosaccharides were the main soluble carbohydrates in seeds stored at 0oC and -14oC, whereas sucrose dominated in seeds stored at room temperature. Scanning electron microscopy (SEM) of seed surface and seed coat sections revealed appearance of an amorphic layer on the surface of seeds stored at room temperature (not observed in other seeds) and distinct shrinking of macrosclereid layer in seeds stored at -14oC. Macrosclereids layer in all seeds was 100 um thick and accounted for 60% of seed coat thickness. The obtained results suggest that for long term storage of lupin seeds at 0oC is the most advisable temperature if both costs of storage and seed storability are considered.
Źródło:
Acta Societatis Botanicorum Poloniae; 2008, 77, 3; 201-205
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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