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    Wyświetlanie 1-12 z 12
    Tytuł:
    Development of a Storage Getter Test for Cu Contaminations in Silicon Wafers Based on ToF-SIMS Measurements
    Autorzy:
    Kot, D.
    Kissinger, G.
    Sattler, A.
    Müller, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1361163.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Opis:
    This work presents development and results of a storage getter test based on the measurement of the metal concentration by time-of-flight secondary ion mass spectroscopy applied for a low Cu contamination level. It was found that Cu atoms introduced into the as-grown sample by a drive-in anneal at high temperature diffuse out from the bulk to the surface within 7 days of storage at room temperature. Annealing steps at low temperature should decrease the time which Cu needs for the outdiffusion to the surface. However, the Cu atoms in samples subjected to outdiffusion annealing at 250C or 400C precipitated in the bulk. The investigation of the getter efficiency by the storage test in silicon samples containing oxygen precipitates has shown that in order to achieve a getter efficiency above 90%, the density of bulk microdefects should be higher than 6 × $10^9 cm^{-3}$.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4; 965-968
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of physico-chemical conditions on the shape of growth curves of Anodonta anatina (Linnaeus, 1758)
    Autorzy:
    Czarnoleski, M.
    Dragosz-Kluska, D.
    Labecka, A.M.
    Muller, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/83865.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
    Tematy:
    physicochemical condition
    shape
    growth curve
    Anodonta anatina
    life strategy
    biotic factor
    abiotic factor
    female
    male
    lake
    Źródło:
    Folia Malacologica; 2012, 20, 1
    1506-7629
    Pojawia się w:
    Folia Malacologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Femtosecond Spectral Hole Burning Spectroscopy as a Probe of Exciton Dynamics in Quantum Dots
    Autorzy:
    Műller, T.
    Moldaschl, T.
    Parz, W.
    Golka, S.
    Strasser, G.
    Unterrainer, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813185.pdf
    Data publikacji:
    2008-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.21.La
    78.47.-p
    78.67.Hc
    Opis:
    We present measurements of the dynamics of photoexcited excitons in an ensemble of InAs/GaAs self-assembled quantum dots using a femtosecond spectral hole burning technique. We use this technique to examine the exciton spin relaxation and the line shape of optical transitions in the dots.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 3; 777-782
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The first ornithosuchid from Brazil and its macroevolutionary and phylogenetic implications for Late Triassic faunas in Gondwana
    Autorzy:
    Muller, R.T.
    Belen von Baczko, M.
    Desojo, J.B.
    Nesbitt, S.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082135.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Archosauria
    Pseudosuchia
    Ornithosuchidae
    biogeography
    phylogeny
    Carnian
    Santa Maria Formation
    South America
    Opis:
    Ornithosuchidae is one of the most enigmatic clades of Triassic pseudosuchians. The group is composed by three carnivorous species that were excavated from Upper Triassic beds of Scotland and Argentina. We describe the first ornithosuchid from the Upper Triassic sediments of Brazil and explore its phylogenetic affinities and implications for the evolution of the group. Dynamosuchus collisensis gen. et sp. nov. was found as the sister taxon of the Argentinean form Venaticosuchus rusconii. These relationships reject a potential endemic radiation of ornithosuchids from the Ischigualasto-Villa Unión Basin and would better support multiple diversification events. Our findings with ornithosuchids is consistent with the pattern reported for proterochampsid and erpetosuchid archosauriforms from Ischigualasto-Villa Unión and the Paraná basins. In addition, the presence of an ornithosuchid in the Late Triassic of Brazil suggests that ornithosuchids were more widespread than previously thought in the southern hemisphere. The new ornithosuchid further demonstrates a faunistic link between the Argentinean and Brazilian basins during the Carnian. Finally, the discovery of the new species provides the first clue of a putative necrophagous vertebrate from the oldest dinosaur-bearing beds and expands our knowledge regarding the trophic structure of the Late Triassic of Brazil.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 1; 1-10
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selective solution mining within complex deposit structur es at Dallol Region in Ethiopia
    Selektywna eksploatacja otworowa kompleksu struktur złożowych w regionie Dallol w Etiopii
    Autorzy:
    Fliss, T.
    Ramm, W.
    Müller, B.
    Ferreira, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2192083.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Stowarzyszenie Górnictwa Solnego
    Tematy:
    solution mining
    potash processing
    drilling
    test well
    pilot plant
    evaporation pond
    eksploatacja otworowa
    przetwarzanie potasu
    wiercenie
    testy orurowania
    pilotażowy zakład
    staw ewaporacyjny
    Opis:
    K-UTEC AG Salt Technologies, a German research and engineering company with more than 60 years of experience within the sector of potash and rock salt mining, develops actually one of the world’s first solution mining operation for selective leaching of potash layers in different levels within the Circum’s Danakil Potash Project. The successful running test work is based on a special well layout and adjusted leaching schedule applying a modified blanket operation. K-UTEC designed the test well and delivered key components of the test facility, like safety equipment and a full laboratory for brine monitoring. To ensure a well targeted test operation K-UTEC commissioned the well and provides a comprehensive support on site. K-UTEC will produce the final products in pilot plant scale after finishing the on site test work.
    K-UTEC AG Salt Technologies jest niemiecką firmą, które od ponad sześćdziesięciu lat zajmuje się badaniami i inżynierią w sektorze wydobycia soli kamiennej i potasowej. Obecnie rozwija projekt selektywnej eksploatacji warstw potasowych na różnych poziomach w ramach CIRCUM’s Danakil Potash Project. Test pilotażowy oparty na specjalnym ułożeniu orurowania i przystosowanym harmonogramie ługowania przeprowadzono z powodzeniem. K-UTEC zaprojektował pilotażowe orurowanie oraz dostarczył części składowe a także wyposarzenie dla laboratorium i monitoringu solanki. Po wykonaniu serii terenowych testów pilotażowych K-UTEC wyprodukuje ostateczne urządzenia do zakładu doświadczalnego.
    Źródło:
    Przegląd Solny; 2017, 13; 126--129
    2300-9349
    Pojawia się w:
    Przegląd Solny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Investigations on the Ejector Forces in the Die Casting Process
    Autorzy:
    Krischke, S.
    Müller, S.
    Schuchardt, T.
    Kouki, Y.
    Dilger, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382411.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    information technology
    foundry industry
    high pressure die casting
    ejector force
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    technologia informatyczna
    przemysł odlewniczy
    odlewanie wysokociśnieniowe
    Opis:
    A measuring system was developed for the measurement of ejector forces in the die casting process. When selecting the sensor technology, particular care was taken to ensure that measurements can be taken with a high sampling rate so that the fast-running ejection process can be recorded. For this reason, the system uses piezoelectric force sensors which measure the forces directly at the individual ejector pins. In this way, depending on the number of sensors, it is possible to determine both the individual ejector forces and the total ejector force. The system is expandable and adaptable with regard to the number and position of the sensors and can also be applied to real HPDC components. Automatic triggering of the measurements is also possible. In addition to the measuring system, a device and a method for in-situ calibration of the sensors have also been developed. To test the measuring system, casting experiments were carried out with a real aluminium HPDC aluminium component. The experiments showed that it is possible to measure the ejector forces with sufficient sampling rate and also to observe the process steps of filling, intensification and die opening by means of ejector forces. Experimental setup serves as a basis for future investigations regarding the influencing parameters on the ejection process.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 116-119
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new basal sphenacodontid synapsid from the Late Carboniferous of the Saar-Nahe Basin, Germany
    Autorzy:
    Frobisch, J.
    Schoch, R.
    Muller, J.
    Schindler, T.
    Schweiss, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/22246.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Carboniferous
    Cryptovenator hirschbergeri
    Germany
    Late Carboniferous
    phylogenetic relationship
    Saar−Nahe Basin
    Sphenacodontidae
    Synapsida
    geological setting
    new species
    paleontology
    sediment
    sphenacodontid synapsid
    systematics
    taxonomy
    Opis:
    A new basal sphenacodontid synapsid, represented by an anterior portion of a mandible, demonstrates for the first time the presence of amniotes in the largest European Permo−Carboniferous basin, the Saar−Nahe Basin. The new taxon, Cryptovenator hirschbergeri gen. et sp. nov., is autapomorphic in the extreme shortness and robustness of the lower jaw, with moderate heterodonty, including the absence of a greatly reduced first tooth and only a slight caniniform development of the second and third teeth. Cryptovenatorshares with Dimetrodon, Sphenacodon, and Ctenospondylus, but notably not with Secodontosaurus, enlarged canines and a characteristic teardrop outline of the marginal teeth in lateral view, possession of a deep symphyseal region, and a strongly concave dorsal margin of the dentary. The new find shows that sphenacodontids were present in the Saar−Nahe Basin by the latest Carboniferous, predating the record of sphenacodontid tracks from slightly younger sediments in this region.
    Źródło:
    Acta Palaeontologica Polonica; 2011, 56, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The stem crustacean Oelandocaris oelandica re-visited
    Autorzy:
    Stein, M
    Waloszek, D.
    Maas, A.
    Haug, J.T.
    Muller, K.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/22166.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    morphology
    stem lineage
    Crustacea
    paleontology
    arthropod
    computer-aided 3D modelling
    Middle Cambrian
    phylogenesis
    evolution
    Arthropoda
    Oelandocaris oelandica
    life habitat
    Opis:
    The arthropod Oelandocaris oelandica from the upper Middle Cambrian “Orsten” of Sweden was recently recognized as a member of the early phase of crustacean evolution based on additional morphological detail from new specimens. Here we present a detailed investigation of all available material. It includes the description of a 400 μm long specimen probably representing an early developmental stage. Variation in size correlated with variation of trunk−segment numbers allowed recognition of different instars. The largest specimens do not exceed an estimated length of about 1 mm, indicating that our material may consist only of immature specimens. The characteristic, extremely long antennula of O. oelandica branches into three long rods. It may have served as the major structure to sweep in food, aided by the two subsequent appendages. These and the more posterior limbs were also responsible for locomotion. Minute pores on the outer edges of the posterior limbs and on the trunk tergites possibly contained sensilla originally, which may have served as water−current detectors. The presence of a minute proximal endite only on the third head appendage suggests a rather basal position of this species within Crustacea, because comparable developmental stages of other known stem crustaceans have such an endite on more of their appendages. Reconstruction of O. oelandica and its life attitudes (referred to the largest instar known) benefited from the application of 3D modelling. These helped, e.g., in identifying the combination of the plesiomorphic feeding function of the antennulae and the specialisation of the exopods of the next two appendages as a step toward the development of a sweep−net mode of feeding, one of the key novelties in the evolution of Crustacea. Such a mode of feeding coupled with locomotion of the three anterior appendages is still practiced in the naupliar and metanaupliar phases of many extant eucrustaceans, and even some adults.
    Źródło:
    Acta Palaeontologica Polonica; 2008, 53, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new glimpse on trophic interactions of 100-million-year old lacewing larvae
    Autorzy:
    Hornig, M.K.
    Kiesmuller, C.
    Muller, P.
    Haug, C.
    Haug, J.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082238.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Neuroptera
    Nymphidae
    food-web reconstruction
    Burmese amber
    larvae
    syninclusions
    Cretaceous
    Myanmar
    Opis:
    Larvae of lacewings (Neuroptera) are known to be fierce predators. According to the morphology of fossil forms this seems to have been the case already in the Early Cretaceous. While being predators, lacewing larvae are also food items for other organisms. Here we report two pieces of amber from Myanmar providing instances of such cases. In one amber piece several isolated stylets of lacewing larvae are preserved closely associated together. The most likely interpretation is that a predator preying on lacewing larvae has regurgitated or defecated these non-digestible pieces, yet the identity of the predator remains unclear. The other amber piece preserves a larva resembling modern day larvae of split-footed lacewings (Nymphidae). The larva has projections on its trunk, allowing it to wear a camouflaging cloak. In the head region, a mite (Acari) is attached to the larva; more precisely, the entire anterior body region of the mite is apparently inserted into the lacewing larva. The mite is smaller than the larva. It is known from the modern fauna that stage 1 larvae of Ascalaphidae can be attacked also by rather small predators, such as ants. The mite can therefore well be interpreted as a true predator instead of a parasite, especially considering the unusual mode of attachment. We briefly review interactions of lacewing larvae with other organisms represented in amber from Myanmar and add two new pieces to the puzzle of reconstructing the trophic interactions in the 100-million-year old amber forest.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 4; 777-786
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On a dinosaur axis from one of the oldest dinosaur-bearing sites worldwide
    Autorzy:
    T. MÜLLER, RODRIGO
    PRETTO, FLÁVIO A.
    STEFANELLO, MICHELI
    SILVA-NEVES, EDUARDO
    DIAS-DA-SILVA, SÉRGIO
    Powiązania:
    https://bibliotekanauki.pl/articles/946007.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    The axial skeleton is proportionally underrepresented in the fossil record of early dinosaurs, when compared to other skeletal parts (e.g., pelvic girdle and hindlimb). For instance, the axis is poorly known in early dinosaurs, which precludes a better understanding of this important anatomical structure. Therefore, the present contribution fills an important gap with a description of the axis of a new early dinosaur (CAPPA/UFSM 0179). The specimen was collected at the Buriol outcrop, a Triassic fossiliferous locality from southern Brazil (Candelária Sequence, Santa Maria Supersequence) biostratigraphically correlated to Carnian units, placing this specimen among the oldest dinosaurs worldwide. Notable features include the combination of a neural spine that bears an almost straight dorsal margin along its length and presence of an epipophysis. This axis arrangement is unique among Carnian dinosaurs, representing a new morphotype, though a similar morphology is observed in some early theropods. Indeed, a phylogenetic analysis nested the specimen within Theropoda. However, this outcome is probably biased by the large amount of missing data in CAPPA/UFSM 0179 and also due to the limited sampling of the axis in early dinosaurs, particularly among sauropodomorphs. As the specimen comes from the site that includes Buriolestes schultzi (an early sauropodomorph), it is quite plausible that CAPPA/UFSM 0179 might be referable to that taxon. If so, the specimen improves the anatomical knowledge of Buriolestes schultzi, given its axis is yet unknown. An alternative possibility to be considered is that the specimen would belong to a dinosaur not yet known in the Candelária Sequence, which would increase its dinosaur diversity for the outcrop, improving the Triassic dinosaurian record from Southern Brazil.
    Źródło:
    Acta Palaeontologica Polonica; 2017, 62, 3; 543-548
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low-Field Magnetoresistance in Manganite Thin Films
    Autorzy:
    Vlakhov, E. S.
    Dörr, K.-H
    Müller, K.
    Handstein, A.
    Nenkov, K.
    Walter, T.
    Chakalov, R. A.
    Chakalova, R. I.
    Spasov, A. Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013419.pdf
    Data publikacji:
    2000-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.Ak
    73.50.Dn
    Opis:
    Grain boundaries play an important role in low-field magnetoresistance of La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ and La$\text{}_{0.7}$Sr$\text{}_{0.3}$MnO$\text{}_{3}$ thin films deposited by magnetron sputtering and pulsed laser deposition on YSZ(100) and silicon substrates buffered by YSZ. Well-pronounced low-field magnetoresistance hysteresis was observed in magnetic fields applied in in-plane and out-of-plane directions. High values of local magnetoresistance sensitivity d(MR)/dH in the vicinity of the coercive field were obtained reaching up to 0.2%/Oe for La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ samples at 5 K.zapis
    Źródło:
    Acta Physica Polonica A; 2000, 97, 5; 787-790
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    R&D of novel medicinal materials for curing cancer: sugar modified Gd-DTPA MRI contrast agents and phospha sugar anti-cancer agents
    Autorzy:
    Yamashita, Y.
    Yamashita, M.
    Fujie, M.
    Suyama, K. A. T.
    Ito, S.
    Reddy, V. K.
    Yamada, M.
    Ogawa, K.
    Ozaki, N.
    Nakamura, S.
    Aoki, T.
    Yu, G.
    Aoshima, K.
    Kato, T.
    Kamikage, N.
    Kiyofuji, K.
    Takehara, Y.
    Sakahara, H.
    Takayanagi, H.
    Oshikawa, T.
    Laurent, S.
    Burtea, C.
    Van der Elst, L.
    Muller, R. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/385218.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    MRI contrast agent
    sugar-ball-dendrimer
    Gd (III)-DTPA complex
    phospha sugars
    phospholanes
    anticancer agent
    tumor
    Opis:
    Novel Sugar Dendritic Gd-DTPA Complexes for MRI Contrast Agents were prepared and evaluated by in vitro and in vivo methods. The sugar dendritic MRI contrast agents have a good blood vesse pool character, and draw blood vessels and liver cancer remarkably clearer than the clinically using Gd-DTPA. Phospha sugar derivatives or phosphorus heterocyclic derivatives provided by functional groups such as epoxide, bromide, etc., were prepared and evaluated by MTT in vitro method. These phospha sugar derivatives showed excellent activities against leukemia cells as well as solid cancer cells in fashions of (i) higher activity, (ii) wider spectra, (iii) higher selectivity and specificity distingushing healthy and cancer cells, etc., compared with the molecular targeting chemotheraputic anti-cancer agent, Gleevec.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 80-83
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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