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Wyświetlanie 1-15 z 487
Tytuł:
Attempt to application of image processing to evaluation of changes in internal structure of wheat grain
Autorzy:
Niewczas, J.
Wozniak, W.
Guc, A.
Powiązania:
https://bibliotekanauki.pl/articles/24976.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
computer analysis
internal structure
grain
wheat grain
X-ray image
kernel
image analysis
Źródło:
International Agrophysics; 1995, 09, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of two types of moisture treatment of wheat grain on endosperm damage
Autorzy:
Wozniak, W.
Powiązania:
https://bibliotekanauki.pl/articles/25696.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
internal damage
X-ray detection
endosperm damage
grain
mechanical damage
wheat grain
kernel
moisture gradient
Źródło:
International Agrophysics; 1995, 09, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer system for analysis of X-ray images of wheat grains
Autorzy:
Strumillo, A.
Niewczas, J.
Szczypinski, P.
Makowski, P.
Wozniak, W.
Powiązania:
https://bibliotekanauki.pl/articles/24261.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
wheat
grain
computer system
X-ray image
image analysis
Źródło:
International Agrophysics; 1999, 13, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Importance of wheat grain orientation for the detection of internal mechanical damage by the X-ray method
Autorzy:
Grundas, S.
Velikanov, L.
Archipov, M.
Powiązania:
https://bibliotekanauki.pl/articles/25784.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
grain hardness
internal damage
X-ray method
mechanical damage
wheat grain
Źródło:
International Agrophysics; 1999, 13, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-destructive method for internal quality determination of Belgian endive [Cichorium intybus L.]
Autorzy:
Quenon, V.
De Baerdemaeker, J.
Powiązania:
https://bibliotekanauki.pl/articles/24883.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
Compositae
Belgian endive
herbal plant
internal quality
quality
Cichorium intybus
X-ray technology
Źródło:
International Agrophysics; 2000, 14, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Organic geochemistry of the Grodziec beds (Upper Carboniferous) : Upper Silesian Coal Basin, Poland
Autorzy:
Bzowska, G.
Fabiańska, M.
Matuszewska, A.
Racka, M.
Skręt, U.
Powiązania:
https://bibliotekanauki.pl/articles/2059437.pdf
Data publikacji:
2000
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Upper Silesia
Carboniferous
sedimentary organic matter
capillary gas chromatography
infrared spectrometry
X-ray differention
n-alkanes
hopanes
Opis:
Five lithologically different rock samples from the "Niwka" brickyard exposure, including one coal sample, were geochemically characterized as regards their mineral composition and sedimentary organic matter present in them. Various methods, including: X-ray diffraction, solvent extraction, group separation by preparative thin layer chromatography, infra-red spectroscopy for assessment of the content of different functional groups in total rock extracts and their separated polar compound fractions, and capillary gas chromatography for analysis of aliphatic hydrocarbon fractions. It was found that the "Niwka" brickyard rocks are rich in organic material present as the plant detritus (cane-break) or as compounds adsorbed on clay and carbonaceous minerals. Yields of bitumen extraction, group composition of extracts and content of various functional groups assessed by infra-red spectra seem to be related to mineral composition of the host rocks and type of kerogen present. Higher contents of clay minerals, especially chlorite, enriches both extracts and their polar compound fractions in aliphatic structures while the organic matter of both sandstones analysed contains more condensed aromatic structures and functional oxygen groups. Generally the organic matter of the host rocks was deposited in an oxic environment and belongs to type III kerogen with a dominant terrestrial biogenic source or to type II kerogen of bacterial/terrestrial origin of primary biogenic matter. Its thermal maturity stage can be estimated as end-diagenetic or early catagenetic. The highest maturity is shown by the organic matter in the basal sandstone (the S2 sandstone) and probably is caused by imput of older migrating bitumen. Biodegradation of organic matter seems to be influenced by the mineral composition of the host rock, with a high content of clay minerals giving protection.
Źródło:
Geological Quarterly; 2000, 44, 4; 425-437
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sources of particulate selenium in the Baltic Sea atmosphere
Autorzy:
Dudzinska-Huczuk, B.
Schneider, B.
Bolalek, J.
Powiązania:
https://bibliotekanauki.pl/articles/48530.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
X-ray fluorescence
aerosol
Rugen Island
air filtration
atmosphere
Baltic Sea
coastal weather station
selenium
Opis:
To determine the atmospheric concentrations and size distributions of particulate selenium (Se), aerosols were collected by air filtration and impactor sampling at the Kap Arkona coastal weather station on the Island of R¨ugen.T otal reflection X-ray fluorescence analysis was used to determine Se and numerous other elements as well.The dependence of the Se concentration on the wind direction and the results of a regression analysis indicated that Se associated with sub-micron particles is mainly derived from anthropogenic sources.The pronounced relationship between Se and Cu indicated that copper smelting is a major source of atmospheric selenium. A marine Se contribution was identified for particles larger than 2 μm.
Źródło:
Oceanologia; 2000, 42, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
0.2-kJ and 2-kJ high rep rate Dense Plasma foci : their design, technology, and applications
Autorzy:
Dubrovsky, A. V.
Gribkov, V. A.
Ivanov, Y. P.
Lee, P.
Lee, S.
Liu, M.
Samarin, V. A.
Powiązania:
https://bibliotekanauki.pl/articles/146546.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
dense plasma focus (DPF)
DPF installation
miniature focus chamber
soft and hard X-ray radiation
Opis:
The paper presents various designs of several medium and small size Dense Plasma Focus (DPF) chambers intended for numerous applications, a description of technologies used in these facilities, and some results reached with these devices by using a number of diagnostic techniques. In present experiments the DP foci have been used mainly as an X-ray source. We discuss here how it is possible to satisfy absolutely new and very strict demands on the construction and technology for the devices to be eventually applied in science and industry. Between these characteristics there are a high repetition rate (typically 1…15 Hz) and a long lifetime (over 1 million shots). Their switching elements, a collector and chambers must withstand a high quasi-continuous heat load (up to 100 kW). High energy density in the central part of the chamber anode and the necessity to provide a channel for radiation extraction demanded a special construction and specific materials implementation in this region. Their X-ray spectrum should be tuned. They have to operate with different working gases and preferably in a wide range of pressures. All these points are discussed in this report. Capabilities of the described techniques are illustrated by results of the recent experimental studies carried out with facilities located at the Nanyang Technological University (NX1) as well as at the Lebedev Physical Institute (PF-0.2).
Źródło:
Nukleonika; 2001, 46, suppl. 1; 107-111
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conformational properties of N',N'-dimethylamides of N-acetyldehydroalanine and N-acetyl-(Z)-dehydropheny-alanine.
Autorzy:
Siodłak, Dawid
Broda, Małgorzata
Rzeszotarska, Barbara
Kozioł, Anna
Dybała, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/1044080.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
alanine and phenylalanine derivatives
N',N'-dimethylamides
X-ray crystallography
α,β-dehydroamino acids
theoretical calculations
Opis:
Conformational preferences of Ac-ΔAla-NMe2 and Ac-(Z)-ΔPhe-NMe2 were studied and compared with those of their monomethyl counterparts as well as with those of their saturated analogues. X-Ray data and energy calculations revealed a highly conservative conformation of the dehydro dimethylamides, which is located in a high-energy region of the Ramachandran map.
Źródło:
Acta Biochimica Polonica; 2001, 48, 4; 1179-1183
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dena, a new PF device
Autorzy:
Tafreshi, M. A.
Farrahi, M.
Lamehi, M.
Goudarzi, S.
Habibi, H.
Memarzadeh, M.
Siahpoush, V.
Saeedzadeh, E.
Vinogradov, V. P.
Krauz, V. I.
Krivtsov, V. A.
Karakin, M. A.
Myalton, V. V.
Tykshaev, V. P.
Powiązania:
https://bibliotekanauki.pl/articles/148836.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Dena
focus
fusion
neutron
plasma
X-ray
Opis:
In this paper we are going to introduce “Dena”, a new Filippov type plasma focus facility, with a condenser bank of 0.288 mF, and a maximum supplying energy of 90 kJ (at Vmax= 25 kV). The facility was installed and started to work in the first quarter of the year 2000. Major points of the paper are: – Dena’s construction, functionality, and diagnostic system. – Preliminary results: Different modes of neutron, X-ray, and “hot spot” production, as well as the possibility of controlling operational mode, by changing anode configuration and initial discharge condition.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 85-87
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of studies on the mechanical properties of winter rape stems
Autorzy:
Skubisz, G.
Powiązania:
https://bibliotekanauki.pl/articles/24479.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
oilseed rape
winter oilseed rape
X-ray method
development
stem
rigidity
shearing energy
stress
mechanical property
Źródło:
International Agrophysics; 2001, 15, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Induced m=0 instability in fast ablative capillary discharges and possible utilisation for X-ray lasers
Autorzy:
Ellwi, S.
Andreic, Z.
Ferri, S.
Juschkin, L.
Koshelev, K.
Kunze, H.
Powiązania:
https://bibliotekanauki.pl/articles/146997.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Balmer-alpha of CVI
capillary discharge
charge exchange
induced instability
X-ray lasers
Opis:
High current linear discharges confined by their own magnetic field are subject to magneto-hydrodynamic instabilities which perturb a straight plasma column. An example is the m=0 mode, which is characterised by the development of necks contracting rapidly towards the axis with the ion sound speed. Discharges through capillaries were assumed to be stable hitherto, but by cutting capillaries lengthwise after a few shots hot spot traces clearly imprinted on the inner wall of the capillary are observed. They are interpreted as marks of an m=0 instability, and this interpretation is substantiated by a series of time-gated pinhole images, which show that the hot plasma region is clearly detached from the wall at the second current maximum and concentrated on the axis thus making the development of the instability possible. The instability occurs only with a specific sample of polyacetal as wall material, and its axial wavelength increases with the length of the capillary. By modulating respectively the inner wall of the capillary the wavelength can be imposed within limits. This is exploited for a soft X-ray laser scheme based on charge exchange pumping of bare carbon ions of hot plasma streaming from the necks and colliding with cold plasma outside the neck regions. Exponential growth of the Balmer-alfa line of CVI at 18.22 nm is realised.
Źródło:
Nukleonika; 2001, 46, 1; 1-3
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Limitations of thermoluminescent dosimeters in soft X-ray diagnostics of pulsed plasma
Autorzy:
Krása, J.
Fárníková, M.
Juha, L.
Cejnarová, A.
Powiązania:
https://bibliotekanauki.pl/articles/147287.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
dosimetry of photons
thermoluminescent dosimeters
X-ray plasma diagnostics
Opis:
Responses of thermoluminescent dosimeters (TLDs) of CaF2:Dy, CaF2:Mn, and LiF:Mg,Cu,P to the deposited energy of monochromatic 1.75–3.5 keV radiation were measured with respect to an increase in the local dose due to the attenuation length that was much shorter than the TLD thickness. The responses of TLDs to X-ray emission from the laserproduced aluminium plasma were found to be independent of the dose rate within a wide range.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 49-51
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multichannel calorimeters for measurement of flows of X-ray radiation in the range from 10 up to 200 keV
Autorzy:
Vinogradov, V. P.
Powiązania:
https://bibliotekanauki.pl/articles/148228.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
calorimeter
hard X-ray
plasma focus
Opis:
An 8-channel calorimeter was developed and applied to the Plasma focus facility (PF) with flat geometry of electrodes (Filippov type) for the measurements of a hard X-ray (HXR) radiation yield and its spectral distribution. The calorimeter measures the time-integrated HXR flux for one shot of the PF facility without any additional calibrations. The sensitivity ~10–4 J/cm2 was achieved.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 99-101
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary study on X-ray source from Plasma Focus device for fast radiography
Autorzy:
Da Re, A.
Mezzetti, F.
Tartari, A.
Verri, G.
Rapezzi, L.
Gribkov, V. A.
Powiązania:
https://bibliotekanauki.pl/articles/147243.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
plasma focus
X-ray sources
Opis:
Plasma derived flash X-ray sources may find potential applications in medicine and industry. Notwithstanding, as is the case of Plasma Focus (PF) devices, their characterisation in term of photon energy, temporal and spatial beam stability is far to be considered satisfactory. In this work, a radiographic approach, which avoids the effects caused by the intrinsic instability of the pinch output of a PF machine, is proposed and an attenuation curve can be attained even in presence of Xray emission instability. Using two radiographic films for each shot exposition symmetrically positioned and collimated to the pinch region the mean energy of the photons in the X-ray beam are evaluated. The X-ray emission symmetry from the pinch region was then utilised to control the validity of the proposed methodology.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 123-125
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 487

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