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    Wyświetlanie 1-12 z 12
    Tytuł:
    Scanning Probe Microscopy and Spectroscopy of High Temperature Superconductors
    Autorzy:
    de Lozanne, A. L.
    Edwards, H. L.
    Yuan, C.
    Markert, J. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968757.pdf
    Data publikacji:
    1998-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.16.Ch
    74.50.+r
    07.79.Cz
    07.79.Pk
    74.72.Bk
    74.72.Hs
    Opis:
    The authors review recent studies of high temperature superconductors conducted with scanning tunneling and magnetic force microscopes. Emphasis is placed on the importance of surface and probe characterization, both of which are likely to affect the detailed nature of the observations.
    Źródło:
    Acta Physica Polonica A; 1998, 93, 2; 333-342
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prevalence of pathogenicity island ETT2 in Escherichia coli isolated from piglets with diarrhea in northeast of China
    Autorzy:
    Yuan, C.W.
    Liu, W.X.
    Hou, J.L.
    Zhang, L.G.
    Wang, G.Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087783.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Escherichia coli
    pathogenicity island
    ETT2
    piglets
    diarrhea
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 1; 5-12
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the protective efficacy of virus-like particles based on PCV 2b and 2d subtypes against mixed challenge in mice
    Autorzy:
    Yuan, X.M.
    Yuan, Q.C.
    Feng, S.M.
    Deng, Z.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539142.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    type 2
    virus-like particles
    vaccine
    mouse
    Opis:
    Porcine circovirus type 2 (PCV2) is an economically important swine pathogen and, although small, it has the highest evolution rate among DNA viruses. Commercial PCV2 commercial vaccines are inactivated PCV2 isolates or a subunit vaccine based on the Cap protein of PCV2. Currently, PCV2 VLPs of individual subtype vaccines are available. Although the main prevalent genotype worldwide is PCV2b, the emerging subtype PCV2d subtype is also increasingly associated with PCV disease. The aim of the study was to evaluate the protective efficacy of VLP based on the PCV2b and 2d subtypes against the mixed challenge of two hypotype PCV2 in mice. Thirty-six female SPV Kunming mice were immunized twice with PCV2b and 2d VLPs, then challenged with PCV2b and PCV2d, to assess the immunogenicity and effectiveness of the VLPs. Vaccination of the mice with PCV2b and 2d VLPs elicited a robust antibody response specific for the PCV2. The virus load detected in the 2b and 2d spleen vaccine group was the lowest compared to other groups. Furthermore, there was no pathological damage in the HE stained sections of the 2b and 2d spleen vaccine, and no virus was detected in the immunohistochemical sections. Our data suggest that the mixed PCV2b and 2d VLP vaccine could protect mice from challenge with the mixed infection of PCV2b and PCV2d.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 2; 195-205
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental study on fracturing coal seams using CaO demolition materials to improve permeability
    Autorzy:
    Tang, Y.
    Yuan, L.
    Xue, J
    Duan, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/92132.pdf
    Data publikacji:
    2017
    Wydawca:
    Główny Instytut Górnictwa
    Tematy:
    soundless chemical demolition
    coal seam
    gas drainage
    CaO
    pokład węgla
    odmetanowanie
    Opis:
    Currently, methane gas disasters in underground coal mines are a major problem which seriously threatens safe mining. This study employed soundless chemical demolition for fracturing coal seams with low permeability. Additionally, the fracturing theory and failure mechanisms of soundless chemical demolition agents were investigated. Materials such as CaO, naphthalene-based water reducer, sodium gluconate and silicate cement were used to prepare the novel soundless chemical demolition agent, whose optimum proportion was discovered to be 90:3:5:7 by carrying out orthogonal experiments. The innovative demolition agent cracked briquettes and the maximum width of cracks reached 16.33 mm, showing significant potential for improving the permeability of coal seams.
    Źródło:
    Journal of Sustainable Mining; 2017, 16, 2; 47-54
    2300-1364
    2300-3960
    Pojawia się w:
    Journal of Sustainable Mining
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural interpretation of the qingdong area in bohai bay basin from shipborne gravity data
    Autorzy:
    Zhang, C.
    Chen, J.
    Song, M.
    Wang, J.
    Yuan, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/259187.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    gravity anomaly
    seismic profile
    rise-in-sag
    structure Unit
    Qingdong depression
    Opis:
    The Qingdong area, located in Bohai bay basin, was suspected good exploration prospects. In order to study tectonic features and find out favourable petroleum prospects in the area, the gravity data at a scale of 1:50,000 were interpreted. This paper, through data processing and synthetic interpretation of the high-precision gravity data in the area, discusses characteristics of the gravity field and their geological implications, determines the fault system, analyses features of the main strata, divides structure units and predicts favourable petroleum zones. The results showed that the faults controlled the development of the Mesozoic and Cenozoic strata and the distribution of local structures in this area. The study revealed that the Qingtuozi uplift and the Kendong uplift in the north were formed in Mesozoic, and the Qingdong depression in the middle was the rift basin in Mesozoic and Cenozoic. Thicker strata in Mesozoic and Cenozoic developed in the Dongying depression and the Qingdong depression, so there is abundant hydrocarbon in these two depressions, and then the Guangligang rise-in-sag and the Qingdong rise-in-sag developed in the center in these two depressions are also favorable places for prospecting
    Źródło:
    Polish Maritime Research; 2015, S 1; 100-105
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reliability and Risk Assessment of Aircraft Electric Systems
    Niezawodność i ocena ryzyka układu elektrycznego samolotu
    Autorzy:
    He, L.
    Yin, C.
    Peng, W.
    Yuan, R.
    Huang, H.-Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/301113.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    interval analytic hierarchy process
    interval eigenvector method
    Bayesian network
    information fusion
    risk assessment
    proces przedziałowej hierarchii analitycznej
    metoda przedziałowych wektorów własnych
    sieć bayesowska
    fuzja informacji
    ocena ryzyka
    Opis:
    It is rather difficult in identifying the fault location and performing risk assessment for complex electronic systems. In this paper a reliability assessment method based on the interval analytic hierarchy process (IAHP) and Bayesian network is proposed to facilitate reliability and risk assessment. After considering the major fault factors, the interval eigenvector method (IEM) is also presented to assess the reliability and comprehensive weights of subsystems. The conditional probability matrices for the factors of risk are defined using an inference rule. Then an updating model of information fusion in the context of Bayesian network is established to assess the risk of system. The proposed method is demonstrated through the risk assessment of an aircraft electric system. The result of the illustrative example shows that the proposed method can not only incorporate the evidence information, but also synthesize all the historical information. A further dynamic adjustment in the safety and risk priority of control measures is quite effective to improve the reliability while mitigating the risk of the electric system.
    Lokalizacja uszkodzeń oraz ocena bezpieczeństwa i ryzyka w przypadku złożonych systemów elektronicznych jest zadaniem dość trudnym. W niniejszej pracy zaproponowano metodę prognozowania niezawodności opartą na procesie przedziałowej hierarchii analitycznej (IAHP), która ma na celu ułatwienie diagnozy uszkodzeń i kontroli ryzyka. Po rozważeniu głównych czynników wywołujących uszkodzenia, zaprezentowano metodę przedziałowych wektorów własnych oraz zdefiniowano, przy użyciu reguły wnioskowania, macierze prawdopodobieństwa dla czynników wpływających na bezpieczeństwo i ryzyko. Następnie, stworzono odnawialny model fuzji informacji w kontekście wnioskowania bayesowskiego służący do oceny stanu zagrożenia Udowodniono, iż włączenie wiedzy eksperckiej do dynamicznej symulacji ułatwia lokalizację uszkodzeń oraz pozwala uzyskać informacje dotyczące diagnozy uszkodzeń. Studium przypadku pokazuje, że dynamiczne dostosowanie priorytetowości związanej z bezpieczeństwem i ryzykiem stosowanych środków kontroli w sposób dość skuteczny zwiększa niezawodność przy jednoczesnym zminimalizowaniu ryzyka w złożonym systemie elektronicznym.
    Źródło:
    Eksploatacja i Niezawodność; 2014, 16, 4; 497-506
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Cotton Matured Fibre Quality and the Super-Molecular Structure in Upland Cotton RILs
    Analiza jakości dojrzałych włókien bawełny Upland i jej struktury nadcząsteczkowej
    Autorzy:
    Wang, Y.
    Li, C
    Shang, H
    Li, B
    Liu, A
    Yuan, Y
    Powiązania:
    https://bibliotekanauki.pl/articles/231848.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    upland cotton
    recombinant inbred lines
    fibre super-molecular structure
    fibre quality
    dojrzałe włókna bawełny
    bawełna Upland
    zmodyfikowana genetycznie bawełna
    cechy włókniste bawełny
    super-molekularna struktura włókien
    jakość włókna
    Opis:
    A RIL(recombinant inbred lines) population with 196 F6:9 lines was developed from an F2 population of upland cotton (Gossypium hirsutum L.) cross of sGK9708×0-153. sGK9708 is a commercial transgenic variety with Bt+CpTI genes resistant to budworm and 0-153 with high fibre quality. Five materials with high fibre strength and five materials with low fibre strength from the recombinant inbred lines were researched [1]. Ten materials of super-molecular structure and fibre quality were studied by X-ray diffraction and the HVI900 technique. The results indicated that cotton matured fibre quality should mainly depend on the decrease in the orientational parameter in the crystalline section, especially the orientational separate and orientational distribution angles. The correlation of fibre maturity, linear density and the fibre super-molecular structure is an innovation in the study. Studies on the correlation of cotton fibre quality and the fibre super-molecular structure provide a scientific basis for the improvement cotton fibre quality.
    Artykuł dotyczy badań jakości dojrzałych włókien bawełny amerykańskiej Upland i jej struktury nadcząsteczkowej. Uzyskano zmodyfikowany genetycznie gatunek bawełny amerykańskiej Upland za pośrednictwem sztucznego samozapylenia bawełny wykazującej cechy włókniste (linii wsobnej). Dla uzyskanych w opisany sposób włókien bawełny przeprowadzono wszechstronne badania właściwości fizycznych, a także struktury nadcząsteczkowej. Uzyskane wyniki badań skonfrontowano z właściwościami fizycznymi i strukturą nadczasteczkową tradycyjnej bawełny amerykańskiej Upland posiłkując się w tym celu analizą korelacyjną.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2014, 5 (107); 28-33
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Contribution on fluid inclusion abundance to activation of quartz flotation
    Autorzy:
    Yuan, Y.
    Zhang, L.
    Guan, J.
    Zhang, C.
    Wu, J.
    Chen, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/110067.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    recovery
    flotation
    mineralogy
    fluid Inclusions
    fluid inclusion abundance
    Opis:
    In this study, comparative experiments were conducted on the recovery of quartz using flotation with different fluid inclusion abundances. A large number of fluid inclusions with various sizes have been found in natural quartz. Micrographs, inductively coupled plasma, electron probe microanalysis, homogenization temperature, Raman spectra, zeta potentials, X-ray photoelectron spectroscopy, scanning electron microscope, and energy dispersive spectrometer were used to characterize the fluid inclusions and quartz, as well as the adsorption tests and single mineral flotation experiments to investigate its floatability. The results demonstrated that it was more likely for quartz with higher fluid inclusion abundance to connect with Fe3+ sufficiently to achieve a high level of flotation recovery, due to the powerful collecting ability by sodium dodecyl sulphonate to Fe3+. Furthermore, the mechanism indicated that the adsorption between quartz and Fe3+ was a process of chemisorption.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 3; 981-991
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of heat stress on leaf morphology and nitrogen–carbohydrate metabolisms in two wucai (Brassica campestris L.) genotypes
    Autorzy:
    Yuan, L.
    Tang, L.
    Zhu, S.
    Hou, J.
    Chen, G.
    Liu, F.
    Liu, S.
    Wang, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/56883.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    Heat stress is a major environmental stress that limits plant growth and yield worldwide. The present study was carried out to explore the physiological mechanism of heat tolerant to provide the theoretical basis for heat-tolerant breeding. The changes of leaf morphology, anatomy, nitrogen assimilation, and carbohydrate metabolism in two wucai genotypes (WS-1, heat tolerant; WS-6, heat sensitive) grown under heat stress (40°C/30°C) for 7 days were investigated. Our results showed that heat stress hampered the plant growth and biomass accumulation in certain extent in WS-1 and WS-6. However, the inhibition extent of WS-1 was significantly smaller than WS-6. Thickness of leaf lamina, upper epidermis, and palisade mesophyll were increased by heat in WS-1, which might be contributed to the higher assimilation of photosynthates. During nitrogen assimilation, WS-1 possessed the higher nitrogen-related metabolic enzyme activities, including nitrate reductase (NR), glutamine synthetase (GS), glutamate synthase (GOGAT), and glutamate dehydrogenase (GDH), which were reflected by higher photosynthetic nitrogen-use efficiency (PNUE) with respect to WS-6. The total amino acids level had no influence in WS-1, whereas it was reduced in WS-6 by heat. And the proline contents of both wucai genotypes were all increased to respond the heat stress. Additionally, among all treatments, the total soluble sugar content of WS-1 by heat got the highest level, including higher contents of sucrose, fructose, and starch than those of WS-6. Moreover, the metabolism efficiency of sucrose to starch in WS-1 was greater than WS-6 under heat stress, proved by higher activities of sucrose phosphate synthase (SPS), sucrose synthase (SuSy), acid invertase (AI), and amylase. These results demonstrated that leaf anatomical alterations resulted in higher nitrogen and carbon assimilation in heat-tolerant genotype WS-1, which exhibited a greater performance to resist heat stress.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2017, 86, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of nitrogen addition on growth and photosynthetic characteristics of Acer truncatum seedlings
    Autorzy:
    Guo, X.
    Wang, R.
    Chang, R.
    Liang, X.
    Wang, C.
    Luo, Y.
    Yuan, Y.
    Guo, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/41162.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    nitrogen addition
    plant growth
    photosynthesis
    Acer truncatum
    tree
    plant morphology
    carbon assimilation
    chlorophyll fluorescence
    seedling
    Opis:
    Increasing levels of atmospheric nitrogen deposition have greatly affected forest trees. Acer truncatum Bunge has a large distribution in northern China, Korea and Japan and plays an important ecological role in forest ecosystems. We investigated the responses of A. truncatum to a broad range of nitrogen addition regimes with a focus on seedling growth, biomass partitioning, leaf morphology, gas exchange physiology and chlorophyll fluorescence physiology. Moderate nitrogen addition promoted shoot height, stem diameter at ground height, total biomass, size of leaves and chlorophyll fluorescence and gas exchange performance, whereas extreme level of nitrogen addition did not result in such facilitation. Chlorophyll content, pattern of biomass partitioning, ratio of leaf length to width, leaf water content, and specific leaf area did not change among the addition regimes. The critical amount of nitrogen deposition should be defined in the context of a certain time period in a particular region for a certain species at a special developmental stage. The critical amount of N deposition that weakens total biomass facilitation in A. truncatum planted in mixed soil of yellow cinnamon soil and humic soil is approximately 10 g N m−2 y−1 during the first growing season.
    Źródło:
    Dendrobiology; 2014, 72
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Real-time optical demultiplexing with the chirped pulses
    Autorzy:
    Li, Y.
    Zhang, X.
    Yuan, J.
    Kang, Z.
    Sang, X.
    Kang, S.
    Kang, X.
    Yan, B.
    Wang, K.
    Yu, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/175106.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    linearly chirped pulse
    parametric process
    real-time optical demultiplexing
    Opis:
    A scheme for real-time optical demultiplexing is proposed by utilizing the time-broadened and linearly chirped pulses instead of the conventional mode-locked pulses. The copies of the optical-time-division-multiplexed signal are acquired through a dual-pump parametric gate and used as the parametric multicast block. Simulation results show that the demultiplexing from 160 Gb/s down to sixteen 10 Gb/s tributaries can be achieved only by using a sampling source of 10 GHz. The proposed scheme can effectively reduce the complexity of parallel processing, and find important applications in the high-speed all-optical signal processing.
    Źródło:
    Optica Applicata; 2018, 48, 4; 621-632
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mitigation scratch on fused silica optics using CO2 laser
    Autorzy:
    Liu, C.-M.
    Yan, Z.-H.
    Yang, L.
    Jiang, Y.
    Zu, X.-T.
    Wang, H.-J.
    Liao, W.
    Yuan, X.-D.
    Zheng, W.-G.
    Powiązania:
    https://bibliotekanauki.pl/articles/174978.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    mitigation
    scratch
    fused silica
    CO2 laser
    Opis:
    The scratch on a fused silica surface was treated as a chain of connected damage sites and mitigated one after another using CO2 laser irradiation. The optical microscopy image shows that a scratch with the width of about 30 μm and length of several millimeters can be completely mitigated without the formation of debris and bubbles. The mitigated scratch can survive under raster scan laser irradiation with the fluency increased up to 11.0J/cm2 at 3ns and 351nm. On the contrary, the substrate without CO2 laser mitigation is seriously damaged under this irradiation. The light modulation induced by mitigation is much smaller when the scratch is mitigated before being damaged. The light modulation is about 2 when the distance to the mitigated sample is larger than 20cm. The birefringence induced by residual stress in the mitigated scratch is measured. The retardance of the mitigated scratch before being damaged is not visible. Therefore, residual stress in this mitigated scratch before being damaged should be not a critical potential risk in laser damage.
    Źródło:
    Optica Applicata; 2016, 46, 3; 387-397
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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