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    Wyświetlanie 1-14 z 14
    Tytuł:
    Investigation on different behavior and mechanism of Ca(II) and Fe(III) adsorption on spodumene surface
    Autorzy:
    Yu, F.
    Wang, Y.
    Wang, J.
    Xie, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/110230.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    spodumene surface
    calcium ions
    iron ions
    adsorption mechanism
    DFT calculation
    Opis:
    Behavior and mechanism of Ca2+ and Fe3+ adsorption on spodumene surface were investigated by micro flotation tests, zeta potential measurements, and density functional theory (DFT) calculation methods. The micro flotation tests showed that Ca2+ and Fe3+ activated the flotation of spodumene remarkably. However, the effect of Fe3+ was more significant than that of Ca2+. Additionally, Fe3+ significantly changed the zeta potential of spodumene while Ca2+ showed a little change. Meanwhile, the calculated adsorption energy of Fe3+ on spodumene surface was much greater than that of Ca2+ indicating that Fe3+ is more apt to be adsorbed on spodumene surface than Ca2+. The value of bond population in Ca-O illustrated that the bond of Ca-O consists of partial covalent proportion and some ionic component. On the contrary, the bond of Fe-O showed a relatively strong covalent property. The partial density of states (PDOS) of free Ca/Fe and the reacted O atom on spodumene (110) surface before and after the adsorption showed that Fe 3d orbital and O 2p orbital formed hybridization. The density of states (DOS) near the Fermi level of spodumene surface after adsorption with Fe3+ was much stronger than that with Ca2+.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 2; 535-550
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of flotation behavior and mechanism of cervantite activation by copper ions
    Autorzy:
    Wang, J.
    Wang, Y.
    Fu, K.
    Xu, L.
    Wang, Z.
    Sun, H.
    Xiao, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/110228.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    flotation
    cervantite
    copper ions
    activation mechanism
    Opis:
    Copper-ion activation plays a highly important role in cervantite (Sb2O4) flotation. Without metal-ion activation, cervantite cannot be floated by sodium oleate. In this study, flotation tests were conducted to study the effect of Cu2+ on the flotation behaviours of cervantite and quartz (SiO2) as the main gangue mineral. Metal-ion adsorption capacities, zeta potentials, solution chemistry and X-ray photoelectron spectra were analyzed to study the adsorption behavior and mechanism of copper ions and sodium oleate interaction with the minerals surfaces. The results demonstrate that under weakly acidic conditions, cervantite can be flotated and separated from quartz by the addition of copper ions. The reason is that copper ions can be selectively adsorbed on the cervantite surface under weakly acidic conditions, thereby promoting the adsorption of sodium oleate onto the cervantite surface by chemical adsorption. Conversely, copper ions are weakly adsorbed on quartz surfaces below pH 6.1, and sodium oleate cannot be adsorbed on quartz surfaces by chemical adsorption. The hydroxy copper species are integral to the selective activation of cervantite over quartz.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 3; 814-825
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Improved Robust Kalman Filter in Data Fusion for PPP/INS Tightly Coupled Positioning System
    Autorzy:
    Li, Z.
    Yao, Y.
    Wang, J.
    Gao, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/221374.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    PPP/INS tightly coupled positioning
    robust filter
    IGG scheme
    Mahalanobis distance
    Opis:
    A robust Kalman filter improved with IGG (Institute of Geodesy and Geophysics) scheme is proposed and used to resist the harmful effect of gross error from GPS observation in PPP/INS (precise point positioning/inertial navigation system) tightly coupled positioning. A new robust filter factor is constructed as a three-section function to increase the computational efficiency based on the IGG principle. The results of simulation analysis show that the robust Kalman filter with IGG scheme is able to reduce the filter iteration number and increase efficiency. The effectiveness of new robust filter is demonstrated by a real experiment. The results support our conclusion that the improved robust Kalman filter with IGG scheme used in PPP/INS tightly coupled positioning is able to remove the ill effect of gross error in GPS pseudorange observation. It clearly illustrates that the improved robust Kalman filter is very effective, and all simulated gross errors added to GPS pseudorange observation are successfully detected and modified.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 2; 289-301
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flotation separation of cervantite from quartz
    Autorzy:
    Wang, J.
    Hua, Y.
    Yu, S.
    Xiao, J.
    Xu, L.
    Wang, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/110941.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    cervantite
    quartz
    dodecylamine
    flotation
    density functional theory
    Opis:
    Flotation separation of cervantite (Sb2O4) from quartz was investigated using dodecylamine (DDA) as a collector. Experiments were conducted on single minerals and on a synthetic mixture of quartz and cervantite. Flotation separation mechanisms were investigated using the zeta potential technique, solution chemistry principles, density functional calculations and Fourier Transform Infrared (FT-IR) spectroscopy. The results indicated that DDA, primarily in the form of molecules, exhibited excellent performance in flotation of cervantite and quartz at pH 10.5. The adsorption energy of the DDA molecules on the cervantite surface was greater than the adsorption energy of water molecules, while the adsorption energy of DDA on the quartz surface was less than the adsorption energy of water molecules. DDA molecules can be adsorbed on the quartz surface to a certain extent, but it was difficult for the same molecule to be adsorbed on the cervantite surface in the pulp. This resulted in flotation of quartz. DDA molecules were adsorbed on quartz not only through physical adsorption but also by hydrogen bonding. However, cervantite could not be floated at pH 10.5 since adsorption of DDA molecules occurred through weak physical bonds on cervantite.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1119-1132
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    De novo sequencing and comparative transcriptome analysis of white petals and red labella in Phalaenopsis for discovery of genes related to flower color and floral differentiation
    Autorzy:
    Yang, Y.
    Wang, J.
    Ma, Z.
    Sun, G.
    Zhang, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/58306.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    sequencing
    RNA sequence
    transcriptome
    Phalaenopsis
    gene
    flower
    colour
    floral differentiation
    diversity
    Opis:
    Phalaenopsis is one of the world’s most popular and important epiphytic monopodial orchids. The extraordinary floral diversity of Phalaenopsis is a reflection of its evolutionary success. As a consequence of this diversity, and of the complexity of flower color development in Phalaenopsis, this species is a valuable research material for developmental biology studies. Nevertheless, research on the molecular mechanisms underlying flower color and floral organ formation in Phalaenopsis is still in the early phases. In this study, we generated large amounts of data from Phalaenopsis flowers by combining Illumina sequencing with differentially expressed gene (DEG) analysis. We obtained 37 723 and 34 020 unigenes from petals and labella, respectively. A total of 2736 DEGs were identified, and the functions of many DEGs were annotated by BLAST-searching against several public databases. We mapped 837 up-regulated DEGs (432 from petals and 405 from labella) to 102 Kyoto Encyclopedia of Genes and Genomes pathways. Almost all pathways were represented in both petals (102 pathways) and labella (99 pathways). DEGs involved in energy metabolism were significantly differentially distributed between labella and petals, and various DEGs related to flower color and floral differentiation were found in the two organs. Interestingly, we also identified genes encoding several key enzymes involved in carotenoid synthesis. These genes were differentially expressed between petals and labella, suggesting that carotenoids may influence Phalaenopsis flower color. We thus conclude that a combination of anthocyanins and/or carotenoids determine flower color formation in Phalaenopsis. These results broaden our understanding of the mechanisms controlling flower color and floral organ differentiation in Phalaenopsis and other orchids.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    SYBR Green-based real-time polymerase chain reaction assay for detection of porcine parvovirus 6 in pigs
    Autorzy:
    Sun, P.
    Bai, C.X.
    Zhang, D.
    Wang, J.
    Yang, K.K.
    Cheng, B.Z.
    Li, Y.D.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087328.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    porcine parvovirus 6
    real-time polymerase chain reaction
    SYBR Green
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 2; 197-202
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a SYBR Green I real-time PCR assay for detection of novel porcine parvovirus 7
    Autorzy:
    Li, Y.D.
    Yu, Z.D.
    Bai, C.X.
    Zhang, D.
    Sun, P.
    Peng, M.L
    Liu, H.
    Wang, J.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087207.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Capsid gene
    PPV7
    SYBR Green I real-time PCR
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 1; 43-49
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fruit biomechanics based on anatomy: a review
    Autorzy:
    Li, Z.
    Yang, H.
    Li, P.
    Liu, J.
    Wang, J.
    Xu, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/24093.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    Fruit biomechanics is needed for quality determination, multiscale modelling and engineering design of fruit processes and equipments. However, these determined fruit biomechanics data often have obvious differences for the same fruit or tissue. In order to investigate it, the fruit biomechanics based on anatomy was reviewed in this paper. First, the anatomical characteristics of fruit biomaterials were described at the macroscopic ‘tissue’ level and microscopic ‘cellular’ level. Subsequently, the factors affecting fruit biomechanics based on anatomy and the relationships between fruit biomechanics, texture and mechanical damage were summarised according to the published literature. Fruit biomechanics is mainly affected by size, number and arrangement of cells, quantity and volume of intracellular spaces, structure, thickness, chemical composition and permeability of cell walls, and pectin degradation level and turgor pressure within cells based on microanatomy. Four test methods and partial determined results of fruit biomechanics were listed and reviewed. The determined mechanical properties data of fruit are only approximate values by using the existing four test methods, owing to the fruit biomaterials being non-homogeneous and living. Lastly, further aspects for research on fruit biomechanics were proposed for the future.
    Źródło:
    International Agrophysics; 2013, 27, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of an Intelligent Computer Method for the Automatic Mosaic of Sequential Slub Yarn Images
    Ocena sekwencyjnej metody przetwarzania obrazu wykorzystywanej do oceny przędz ozdobnych
    Autorzy:
    Li, Z.
    Zhang, N.
    Wu, Y.
    Wang, J.
    Pan, R.
    Gao, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/232526.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    sequential slub yarn image
    image mosaic
    image processing
    NCC method
    sekwencyjny obraz przędzy slub
    mozaika obrazu
    przetwarzanie obrazu
    metoda NCC
    Opis:
    This paper is the second part of a series reporting the recent development of a computerised method for automatic mosaic sequential yarn images. In our earlier work, an effective method for stitching sequence slub yarn images automatically was developed based on image processing and the normalised cross correlation (NCC) method. 100 image pairs of two kinds of slub yarn were measured in certain specific conditions, such as the frame rate, size of stitching template, etc., and the measurement results were evaluated with the manual method. In this paper, the effects of various influencing factors are numerically examined, including the stitching template size, threshold value, frame rate, and computing time of the mosaic algorithm. The feasibility and accuracy of the fully computerized method were evaluated further under the various influencing parameters. One hundred percent cotton ring spun single slub yarns of 27.8, 15.6, and 9.7tex were prepared and used for the evaluation. The measurement results obtained by the method proposed are analysed and compared with those measured manually by Adobe Photoshop. The experimental results show that the method proposed can accurately find the stitch position and has a high consistency with the manual method when the matching template is 100 × N pixels, the threshold value T1∈[20, 40] and T2∈[51, 80], and the frame rate is greater than 40fps.
    Artykuł jest drugą częścią serii opisującej opracowanie sekwencyjnej metody przetwarzania obrazu przędz ozdobnych. We wcześniejszej pracy opracowano skuteczną metodę oceny przędz w oparciu o przetwarzanie obrazu i znormalizowaną metodę korelacji krzyżowej (NCC). Zbadano w określonych warunkach (liczba klatek na sekundę, rozmiar szablonu szycia itp.) 100 par obrazów dwóch rodzajów przędz, a następnie oceniono wyniki pomiarów. Przeprowadzono eksperymenty mające na celu zbadanie wykonalności i dokładności proponowanej metody. W pracy przeanalizowano numerycznie wpływ różnych czynników tj. rozmiaru szablonu, wartości progowej, liczby klatek na sekundę i czasu obliczeń algorytmu mozaikowego. Wykonalność i dokładność w pełni skomputeryzowanej metody zostały poddane dalszej ocenie. Metodę manualnej segmentacji obrazu i metodę automatycznej identyfikacji powierzchni przędzy ozdobnej przy wykorzystaniu odpowiednio przygotowanego algorytmu opartego o techniki numeryczne. W metodzie ręcznej segmentacji wprowadzono zmienne oparte o prędkość odczytywania danych z obrazu, które następnie poddawano analizie. W metodzie automatycznej zaproponowano wprowadzenie innych bardzie przydatnych zmiennych do identyfikacji charakterystycznych cech strumienia włókien. Plan eksperymentu obejmował trzy rodzaje przędz bawełnianych wytworzonych na przędzarce obrączkowej (27,8, 15,6 i 9,7tex). Wyniki pomiarów zaproponowanej metody analizowano i porównywano z pomiarami wykonywanymi ręcznie. Wyniki eksperymentalne pokazały, że proponowana metoda może być z powodzeniem stosowana i ma wysoką zgodność z metodą ręczną, przy szablonie 100 x N pikseli, wartości progowej T1∈ [20, 40] i T2∈ [51, 80] oraz liczbie klatek na większej niż 40 klatek na sekundę.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2018, 2 (128); 38-48
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biomechanical evaluation of tendon connection with novel suture techniques
    Autorzy:
    Chen, Z.
    Wang, J.
    Wei, J.- S.
    Hou, Z.-Y.
    Li, M.
    Chen, Q.-X
    Powiązania:
    https://bibliotekanauki.pl/articles/306902.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ścięgno Achillesa
    IFLL
    biomechanika
    internal fixation with limited loop
    Achilles tendon
    biomechanics
    Opis:
    Achilles tendon rupture is a severe injury with poor curative effect due to its anatomical characteristic and mechanical peculiarity. Internal fixation of limited loop (IFLL) with steel-wire has been applied on patients with tendon rupture to fix the broken ends before physical rehabilitation. The purpose of this study is to investigate the biomechanical property and radiological characteristic of such suture technique for the repairment of tendon rupture. Methods: Tendons of pigs’ hint feet were separated for the biomechanical study. Suture surgery was performed according to the protocol of IFLL. Biomechanical Testing Machine was adopted to conduct the biomechanical tensile load examination. The maximal load, elastic modulus and tendon stiffness of the stitched tendons with or without reinforcement were examined. Results: The maximum tensile load of the stitched tendons using IFLL reached 1/4 of the uninjured tendon’s maximum tensile load, indicating that such suture technique is capable of providing enough tension for the ruptured tendon. Surprisingly, tendons fixed with titanium wire showed the highest load tension, which was comparable to the undamaged tendon. Therefore, we found the biomechanical basis of using IFLL in effectively connecting the rupture ends of tendons. Conclusions: In conclusion, we provide biomechanical evidence for the use of IFLL in treatment of Achilles tendon rupture, by providing enough strength for the ankle function. Such suture technique could help the patients with better rehabilitation and reduced in-hospital stay after Achilles tendon injury.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2018, 20, 1; 135-141
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fatigue Behavior and Mechanism of FV520B-I Owing to the Effect of Loading Frequency on the Fatigue Property in HCF and VHCF Regime
    Autorzy:
    Wang, J.
    Zhang, Y.
    Shi, B.
    Zhao, Q.
    Sun, Q.
    Zhang, Z.
    Lu, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/353784.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ultrahigh loading frequency
    FV520B-I
    fatigue strength
    fatigue conversion model
    Opis:
    Fatigue property of FV520B-I is affected by the ultrahigh loading frequency significantly, and the ultrasonic fatigue experimental data can’t be employed directly to analyze the fatigue failure in the actual remanufacturing engineering. However few theories about the effect of loading frequency on the fatigue property of FV520B-I has ever been proposed. In this paper, both ultrasonic experiment and conventional experiment are conducted out to obtain the fatigue data. The effect of loading frequency on the fatigue data distribution is discussed firstly, its fatigue limit declines with the increase of the loading frequency. Then the fracture surface observations are captured, the fatigue property and fatigue behavior mechanism of FV520B-I is examined by analyzing the fracture surface features, crack initiation and failure observations. A new material frequency correction factor is proposed and introduced to eliminate the influence of the loading frequency on the FV520B-I fatigue property. FV520B-I empirical fatigue life conversion model and fatigue strength conversion model are established with comprehensive use of a fitting algorithm based on the combination of experimental data and classic formula. A clear understand of the effect of loading frequency on the fatigue property of FV520B-I is novel and has an important significance in guaranteeing the accuracy of the actual fatigue analysis of FV520B-I in the remanufacturing engineering.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 347-357
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for tracing exogenous DNA uptake in live spermatozoa and embryos
    Autorzy:
    Mu, Y.
    Wang, J.
    Liu, Z.
    Zhao, Y.
    Zhang, X.
    Jiao, M.
    Lv, J.
    Hao, J.
    Kong, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087751.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spermatozoa
    SMGT
    exogenous DNA
    IVF
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 1; 193-202
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular cloning, expression, purification and osteoblasts proliferation activity of sika deer thymosin beta10
    Autorzy:
    Zhao, D.
    Zhao, Y.
    Zhang, H.
    Xu, Z.
    Liu, M.
    Wang, J.
    Bai, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087874.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    affinity chromatography
    cell proliferation
    prokaryotic expression
    sika deer
    thymosin 10
    Źródło:
    Polish Journal of Veterinary Sciences; 2017, 4; 751-758
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comprehensive surveillance of the antibody response to Borrelia burgdorferi s.l. in small ruminants in China
    Autorzy:
    Yang, J.
    Liu, Z.
    Guan, G.
    Li, Y.
    Chen, Z.
    Ma, M.
    Liu, A.
    Ren, Q.
    Wang, J.
    Luo, J.
    Yin, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/49708.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2015, 22, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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