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    Wyświetlanie 1-14 z 14
    Tytuł:
    Effects of organic cultivation pattern on tomato production: plant growth characteristics, quality, disease resistance, and soil physical and chemical properties
    Autorzy:
    Feng, X.
    Xu, Y.
    Liu, D.
    Peng, L.
    Dong, J.
    Yao, S.
    Feng, Y.
    Feng, Z.
    Li, F.
    Hu, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/12703546.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Tomato (Solanum lycopersicum L.) is one of the world’s most important cultivated vegetable. In the traditional cultivation methods, the excessive use of pesticides and fertilizers leads to an imbalance of nutrient elements in the soil, an increase in pests and diseases and a decrease in vegetable quality and yield. In the face of increasingly serious environmental and food problems, organic agriculture is considered to be an effective solution. In this experiment, the effects of organic cultivation patterns on the growth, quality, disease resistance in tomatoes, and the physical and chemical properties of soil were studied by different treatments. The results showed that the application of effective microorganisms (EM) bio-organic fertilizer in the cultivation process can significantly improve the yield, quality, and antioxidant enzyme activity of tomato. The use of straw mulching was found to significantly increase the growth, chlorophyll content, transpiration rate, and soluble sugar content of tomatoes. The application of EM bio-organic fertilizer or straw mulching significantly increased the activity of antioxidant enzyme and the expression of LeCHI gene in tomato leaves and enhanced tomato resistance to diseases. Organic production practices were found to significantly improve the soil.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 1; 71-84
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving Triggering Characteristics for a Surface-Flashover Triggered Vacuum Switch
    Autorzy:
    He, Z.
    Wang, L.
    Li, F.
    Yao, W.
    Dong, M.
    Zhao, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807889.pdf
    Data publikacji:
    2009-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.80.Vp
    52.75.Kq
    52.25.Mq
    Opis:
    A surface-breakdown triggered vacuum switch with parallel disk electrodes and semiconductor surface flashover trigger electrode has many advantages, it is easy to be triggered and machined. The resistance of the trigger gap has been increased in terms of modifying the thickness of the semiconductor layer and improving coating process technology. The trigger gap resistance, trigger voltage and trigger waveforms were experimentally tested. The results show that the triggering characteristics can be improved by increasing the trigger resistance.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 6; 1019-1021
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A multiplex PCR for simultaneous detection of classical swine fever virus, African swine fever virus, highly pathogenic porcine reproductive and respiratory syndrome virus, porcine reproductive and respiratory syndrome virus and pseudorabies in swines
    Autorzy:
    Hu, L.
    Lin, X.Y.
    Yang, Z.X.
    Yao, X.P.
    Li, G.L.
    Peng, S.Z.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/30249.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    In this assay, we developed and evaluated a multiplex PCR (mPCR) for its ability in detecting multiple infections of swine simultaneously. Four pairs of primers were used to detect five viruses. Specific primers were designed for classical swine fever virus (CSFV), African swine fever virus (ASFV) and pseudorabies (PRV). A pair of primers was designed prudently for two different types of porcine reproductive and respiratory syndrome virus that respectively were porcine reproductive and respiratory syndrome virus (PRRSV), highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV). The detection limits of the mPCR were 1.09×10⁴, 1.50×10³, 2.10×10³, 1.30×10³ and 8.97×10² copies/reaction for CSFV, ASFV, HP-PRRSV, PRRSV and PRV, respectively. A total of 49 clinical specimens were tested by the mPCR, and the result showed that co-infection by two or three viruses was 51%. In conclusion, the PCR is a useful tool for clinical diagnosis of not only single infections but also mixed infections in swines.
    Źródło:
    Polish Journal of Veterinary Sciences; 2015, 18, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    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:
    Different Ignition Responses of Powdery and Bulky 1,3,5-Triamino-2,4,6-trinitrobenzene (TATB) Based Polymer-bonded Explosives under Ultra-high Voltage Electrostatic Discharge
    Autorzy:
    Lyu, Z.
    Long, X.
    Li, Z.
    Dai, X.
    Deng, C.
    He, S.
    Li, M.
    Yao, K.
    Wen, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/358240.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    electrostatic spark sensitivity
    ultra-high voltage electrostatic discharge
    thermal effect
    electric field effect
    Opis:
    The electric spark induced ignition mechanism for explosives needs further study. The ignition of powdery and bulky TATB by electrostatic discharge (ESD) was investigated. Up to 200 kV ultra-high voltage ESD was applied to powdery and bulky explosives of two TATB-based polymer-bonded explosives (named PBX-1 and PBX-2). The results showed that the spark sensitivities of powdery and bulky explosives are extremely different for the same formulation. The 50% ignition voltages of powdery PBX-1 and PBX-2 were 10.8 kV and 8.5 kV, respectively, while the values for the bulky samples (tablets) were not less than 200 kV. Both heat and the electric field can be transmitted into the powdery samples, on the other hand only the electric field can be transmitted into the bulk samples. The electric field has a smaller contribution while the heat has a larger contribution to the ignition during an ESD, i.e., the thermal effect plays a main role in the ignition process. Our experimental results are in good agreement with recent results calculated by density functional theory.
    Źródło:
    Central European Journal of Energetic Materials; 2018, 15, 2; 283-298
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and Analysis of an Interconnected Suspension for a Small Off-Road Vehicle
    Autorzy:
    Minaker, B. P.
    Yao, Z
    Powiązania:
    https://bibliotekanauki.pl/articles/140324.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    vehicle dynamics
    interconnected suspension
    multibody dynamics
    dynamika pojazdu
    zawieszenie połączone
    dynamika układów wieloczłonowych
    Opis:
    The paper describes the design and multibody dynamic analysis of a mechanically interconnected suspension, as applied to a small off-road vehicle. Interconnected suspensions use some sort of connection between the axles of a vehicle in order improve ride quality or vehicle handling. In principle, the connection may be hydraulic, pneumatic, or mechanical, but for installation in a typical passenger car, a mechanical connection would likely be impractical due to weight and complexity. In this paper, the vehicle in question is the University of Windsor SAE Baja off-road competition vehicle, and novel mechanical design is proposed. A multibody dynamic analysis is performed on the proposed design using the EoM open source multibody software developed by the University of Windsor Vehicle Dynamics and Control research group in order to assess any potential performance improvements.
    Źródło:
    Archive of Mechanical Engineering; 2017, LXIV, 1; 5-21
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Annealing Temperature and Ambient on Formation, Composition and Bandgap of $Cu_2ZnSnS_4$ Thin Films
    Autorzy:
    Sun, Y.
    Yao, B.
    Meng, X.
    Wang, D.
    Long, D.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1205220.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.-a
    Opis:
    Amorphous Cu-Zn-Sn-S precursor films were prepared by sol-gel and spin-coating with copper chloride, zinc chloride, tin chloride and thiourea solutions as starting materials. A $Cu_2ZnSnS_4$ film with kesterite structure and a small amount of chlorine formed when the precursor was annealed under Ar ambient at temperature above 200°C, but its atomic ratios of Cu:Zn:Sn:S far deviated from stoichiometric ratios of the $Cu_2ZnSnS_4$. However, when the precursor films were annealed with sulfur powder together at temperatures between 360 and 480°C, the CZTS film containing a very small amount of Cl formed, and its atomic ratio change little for Cu, Zn, and Sn, increases for S and decreases for Cl with increasing temperature. When the temperature is 480°C, a CZTS only has Cu, Zn, Sn, and S element is fabricated, and the atomic ratio of Cu:Zn:Sn:S is near the stoichiometric ratio. The bandgap of the CZTS decreases with increasing annealing temperature. The mechanisms of the formation and the properties of the CZTS are suggested in the present work.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 3; 751-756
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Cycle Sputtering Deposition on the Properties of Cu₂ZnSnS₄ Thin Films
    Autorzy:
    Sun, Y.
    Yao, B.
    Long, D.
    Meng, X.
    Liu, L.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398930.pdf
    Data publikacji:
    2016-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.40.Fy
    Opis:
    Three kinds of precursor thin films with stacking orders of Cu/Sn/ZnS, Cu/Sn/ZnS/Cu/Sn/ZnS and Cu/Sn/ZnS/Cu/Sn/ZnS/Cu/Sn/ZnS were prepared by magnetron sputtering and annealed with sulfur powder. The microstructure, morphology and optical properties of thin films were investigated by X-ray diffraction, the Raman scattering, scanning electron microscopy and UV-visible spectrophotometer. The increase of cycle number decreases the sulfurizing temperature of the formation of Cu₂ZnSnS₄ phase. Chemical composition can be controlled by cycle sputtering deposition. After sulfurizing at 500°C, the particle size and the band gap increase with increasing cycle number.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 6; 1169-1172
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prokaryotic expression, purification and antigenicity analysis of African swine fever virus pK205R protein
    Autorzy:
    Wu, X.
    Xiao, L.
    Peng, B.
    Wang, Y.
    Yang, Z.
    Yao, X.
    Hu, L.
    Lin, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/30963.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    African swine fever is an acute, febrile and highly virulent porcine disease causing serious economic losses worldwide. The pK205R protein of the African swine fever virus (ASFV) is largely expressed in the early stages of infection, which has given the K205R gene extensive attention. In this study, the ASFV K205R was cloned and expressed in Escherichia coli BL21 (DE3). Expression of histidine-tagged pK205R with a molecular mass of 44 kDa was determined by 12% sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot analysis. Optimisation of culture conditions allowed induction of the recombinant protein with 0.4 mM Isopropyl β-D-thiogalactoside (IPTG) at 37oC for 2 h. The protein existed in cellular supernatant and was purified using a Ni-NTA resin column. The purified protein was used to immunize rabbits four times to enable the production of polyclonal antibodies, and the antiserum titre was detected by ELISA. The results showed that the purified pK205R can react with ASFV positive serum specifically by Western blotting. The pK205R had high antigenicity, which indicated that pK205R could be used as an antigen for detection of ASFV-specific antibodies in ELISA testing, and the recombinant protein could contribute to further research of the action and structure of pK205R.
    Źródło:
    Polish Journal of Veterinary Sciences; 2016, 19, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust L2 consensus of high-order swarm systems with time-varying delays
    Autorzy:
    Xi, J
    Yao, Z
    Liu, G.
    Zhong, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/205770.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    consensus
    swarm system
    uncertainty
    time delay
    disturbance rejection
    Opis:
    Consensus problems for high-order continuous-time swarm systems in directed networks with time delays, uncertainties and external disturbances are investigated. Firstly, the state space of a swarm system is decomposed into a consensus subspace (CS) and a complement consensus space (CCS). A necessary and sufficient condition for the system with time delays and uncertainties to achieve consensus is presented based on the state projection on CCS, and an explicit expression of the consensus function is shown on the basis of the state projection on CS. Then, a sufficient condition for the system to achieve consensus with a desired L2 performance is given. Finally, numerical simulations are shown to demonstrate theoretical results.
    Źródło:
    Control and Cybernetics; 2014, 43, 1; 59-77
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The experimental study on inner shift lining structure of freezing shaft in deep thick aquiferous soft rock
    Badania eksperymentalne nad konstrukcją przesunięcia wewnętrznego obudowy w szybach głębionych metodą zamrażania w wodonośnej skale miękkiej o dużej głębokości i grubości
    Autorzy:
    Yao, Z. S.
    Song, H. Q.
    Cheng, H.
    Rong, C. X.
    Powiązania:
    https://bibliotekanauki.pl/articles/348681.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    formacja wodonośna
    skała miękka
    głębienie szybów metodą zamrażania
    przesunięcie wewnętrzne obudowy
    testy modelowe
    aquifer
    soft rock
    freezing shaft-sinking method
    inner shift lining
    model tests
    Opis:
    Aimed at the supporting problems of inner shift lining of freezing shaft in the deep thick aquiferous soft rock of the west area in China, the mechanical characteristic of inner shaft is systematically studied by model test and theory analysis. First, the model of high strength reinforced concrete is designed and the test pieces are manufactured according to a similarity theory. Then, through loading test, the stress, strain and strength characteristics of this shaft lining structure are gained. The results indicate that the structure of high strength reinforced concrete shaft lining is under tri-axial compressive stresses states, the distortion is evidently restricted and the concrete compressive strength in the shaft lining structure increases 1.562-1.859 times than the monomial compressive strength, the actual carrying capacity is highly increased, and the concrete utmost compressive strain reached -3500 micro/eta. The shaft lining is fairly plastic when it was damaged. Then a formula for calculating the shaft lining's ultimate bearing capacity is given on the basis of the theoretical research and experimental results. Thus, the studied results can provide a reference for the theory study and engineering application of this shaft lining structure.
    Mając na uwadze problemy dotyczące przesunięcia wewnętrznego obudowy w szybach głębionych metodą zamrażania w wodonośnych skałach miękkich na dużej głębokości występujących w zachodnim rejonie Chin, wykonywane są systematyczne badania parametrów przesunięcia wewnętrznego obudowy przy użyciu testów modelowych i analizy teoretycznej. Badanie wymaga wykonania modelu z wytrzymałego żelbetu i elementów testowych zgodnie z teorią podobieństwa. Następnie przeprowadzany jest test obciążenia dla uzyskania charakterystyki naprężeń, odkształceń i wytrzymałości konstrukcji obudowy przesunięcia. Wyniki pokazują działanie naprężeń trójosiowych na ściskaną konstrukcję obudowy z wytrzymałego żelbetu, znaczne zmniejszenie zniekształceń, zwiększenie wytrzymałości betonu na ściskanie w strukturze obudowy 1,562-1,859-krotnie w stosunku do wartości jednomianowej, poprawę nośności rzeczywistej oraz wartość maksymalną wytrzymałości betonu na ściskanie - 3500 micro/eta. Po uszkodzeniu obudowa jest dość plastyczna. Następnie opracowywany jest wzór na obliczenie maksymalnej nośności obudowy na podstawie wyników badań teoretycznych i eksperymentalnych. Wyniki mogą zapewnić odniesienie dla badań teoretycznych i zastosowań technicznych konstrukcji obudowy przesunięcia wewnętrznego.
    Źródło:
    AGH Journal of Mining and Geoengineering; 2012, 36, 3; 463-470
    1732-6702
    Pojawia się w:
    AGH Journal of Mining and Geoengineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isolation of biosynthesis related transcripts of 2,3,5,4-tetrahydroxy stilbene-2-O-beta-D-glucoside from Fallopia multiflora by suppression subtractive hybridization
    Autorzy:
    Zhao, W.
    Sheng, S.
    Liu, Z.
    Lu, Di.
    Zhu, K.
    Li, X.
    Zhao, S.
    Yao, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/58239.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    isolation
    biosynthesis
    transcriptome
    2,3,5,4'-tetrahydroxy stilbene-2-O-beta-D-glucoside
    Fallopia multiflora
    hybridization
    gene expression
    medicinal plant
    Chinese herb
    Opis:
    2,3,5,4'-tetrahydroxy stilbene-2-O-ß-D-glucoside (THSG) exerts multiple pharmacodynamic actions, found in Fallopia multiflora, but the biosynthesis pathway of THSG is still unclear. To clear this ambiguity, we constructed suppression subtractive hybridization (SSH) libraries to screen the genes involved in THSG biosynthesis from two F. multiflora varieties, which vary significantly in THSG content. Twelve non-redundant differentially expressed sequence tags were obtained and the full lengths of 4 unreported fragments were amplified by rapid amplification of cDNA ends. We totally got 7 fulllength transcripts, and all of them were aligned to the transcriptome and digital gene expression tag profiling database of four F. multiflora tissues (root, stem and leaf from Deqing F. multiflora and another root from Chongqing F. multiflora; data unpublished) using local BLAST. The results showed that there was a significant, organ specific difference in the expression of fragments and full-length sequences. All the sequences were annotated by aligning to nucleotide and protein databases. Kyoto Encyclopedia of Genes and Genomes pathway analysis indicated that THSG biosynthesis was correlated with multiple life activities.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Some Variables on the Fibre Packing Pattern in a Yarn Cross-section for Vortex Spun Yarn
    Wpływ wybranych zmiennych na upakowanie włókien w przekroju poprzecznym przędzy typu vortex
    Autorzy:
    Zou, Z.
    Zheng, S
    Cheng, L
    Xi, B
    Yao, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/233743.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    vortex spun yarn
    process parameter
    fibre packing density
    yarn structure
    vortex
    rozkład włókien
    wir przędzy
    parametr procesu
    grubość przędzy
    struktura przędzy
    Opis:
    This paper examined the influence of various parameters such as fibre fineness, yarn count, distance from the front roller nip point to the hollow spindle, nozzle pressure and yarn delivery speed on the fibre packing pattern in a yarn cross-section for vortex spun yarn. Cross-section images of vortex spun yarns were used to evaluate the fibre packing pattern. Results from different variables influencing the fibre packing pattern for vortex spun yarn were also analysed. The results indicated that the fibre fineness, yarn count, distance from the front roller nip point to the hollow spindle, nozzle pressure and yarn delivery speed are all significant parameters for yarn hairiness and fibre packing density in a vortex spun yarn cross-section.
    Badano wpływ grubości włókien, masy liniowej przędzy, odległości przedniej rolki do wydrążonego wrzeciona, ciśnienia w dyszy i szybkości podawania przędzy na upakowanie włókien w przekroju poprzecznym przędzy przędzionej systemem vortex. Zdjęcia przekrojów poprzecznych przędzy zostały wykorzystane dla oceny upakowania włókien. Wyniki analizy rozkładów włókien wykazały, że wszystkie badane parametry mają wydatny wpływ na upakowanie i włochatość w przędzy przędzionej systemem vortex.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2014, 2 (104); 40-46
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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