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Wyświetlanie 1-15 z 35
Tytuł:
17 beta-estradiol affects proliferation and apoptosis of canine bone marrow mesenchymal stem cells in vitro
Autorzy:
Zhou, Z.-H.
Gu, C.-W.
Li, J.
Huang, X.-Y.
Deng, J.-Q.
Shen, L.-H.
Cao, S.-Z.
Deng, J.-L.
Zuo, Z.-C.
Wang, Y.
Ma, X.-P.
Ren, Z.-H.
Yu, S.-M.
Powiązania:
https://bibliotekanauki.pl/articles/2087308.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
apoptosis
bone marrow mesenchymal stem cells (BMSCs)
canine
proliferation
17 beta-estradiol (E2)
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 2; 235-245
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A euenantiornithine bird from the Late Cretaceous Hateg Basin of Romania
Autorzy:
Wang, X.
Dyke, G.J.
Codrea, V.
Godefroit, P.
Smith, T.
Powiązania:
https://bibliotekanauki.pl/articles/21454.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
We present the first record of a euenantiornithine bird from Romania. A small collection of fossil remains from the Maastrichtian add to the known distribution of large euenantiornithines and descriptions of birds from the Haţeg Basin augment the known vertebrate fauna from this famous region of Transylvania. The new specimens referred here to an indeterminate taxon of euenantiornithine further demonstrate that the larger members of this diverse Cretaceous lineage were globally distributed, as many birds are today.
Źródło:
Acta Palaeontologica Polonica; 2011, 56, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A mode-III crack with variable surface effects
Autorzy:
Wang, X.
Schiavone, P.
Powiązania:
https://bibliotekanauki.pl/articles/282009.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
surface elasticity
variable surface moduli
mode-III crack
Cauchy singular integro-differential equation
Opis:
We study the contribution of variable surface effects to the antiplane deformation of a linearly elastic material with a mode-III crack. The surface elasticity is incorporated using a modified version of the continuum based surface/interface model of Gurtin and Murdoch. In our discussion, the surface moduli are not constant but vary along the crack surfaces. Using Green’s function method, the problem is reduced to a single first-order Cauchy singular integro-differential equation, which is solved numerically using Chebyshev polynomials and a collocation method. Our results indicate that the gradient of the surface shear modulus exerts a significant influence on the crack opening displacement and on the singular stress field at the crack tips.
Źródło:
Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1319-1327
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
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:
A polarization filter at 1550 nm based on photonic crystal fiber with symmetry around gold-coated holes
Autorzy:
Zha, F.
Li, J.
Sun, P.
Wang, X.
Powiązania:
https://bibliotekanauki.pl/articles/173897.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
photonic crystal fiber
polarization filter
finite element method
surface plasmon resonance
Opis:
A polarization photonic crystal fiber based on surface plasmon resonance is proposed in this paper. The photonic crystal fiber with gold coated holes is studied through using the finite element method. The impacts of structural parameters on the resonance characteristics are discussed. Numerical simulations show that the resonance wavelength can be modulated by changing the parameters of the air holes and thickness of gold layer. At the resonance wavelength 1550 nm, the loss is 3.8045 dB/m in x-polarization and the loss is 28464 dB/m in y-polarization by adjusting the size of the gold-coated holes and the place of air holes. Results show that the loss of y-polarized mode is much larger than the loss of x-polarized mode. The y-polarized mode is suppressed, and only x-polarized mode can be guided at the resonance wavelength of y-polarized mode. The results indicate that the mode polarized in one direction can be filtered out selectively by adjusting the diameter of air holes, and the filtering effect in a communication band is achieved.
Źródło:
Optica Applicata; 2018, 48, 4; 609-620
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A screw dislocation located outside, inside or on the interface of a parabolic elastic inhomogeneity
Autorzy:
Wang, X.
Schiavone, P.
Powiązania:
https://bibliotekanauki.pl/articles/38627364.pdf
Data publikacji:
2021
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
screw dislocation
parabolic elastic inhomogeneity
superposition
conformal mapping
analytic continuation
Opis:
Using conformal mapping techniques, superposition and analytic continuation, we derive analytic solutions to the problem of a screw dislocation interacting with a parabolic elastic inhomogeneity. The screw dislocation can be located anywhere either in the surrounding matrix or in the parabolic inhomogeneity or simply on the parabolic interface itself. We obtain explicit expressions for the two analytic functions in the image plane characterizing the elastic fields describing displacement and stresses in the two-phase composite. Using the Peach-Koehler formula, we also obtain the image force acting on the screw dislocation. The analytic function defined in the parabolic inhomogeneity in the physical plane can be interpreted in terms of real and image screw dislocations for any location of the real screw dislocation.
Źródło:
Archives of Mechanics; 2021, 73, 3; 219-235
0373-2029
Pojawia się w:
Archives of Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption efficiency of pentafluorobenzene on ionic liquids-based silicas
Autorzy:
Wang, X.
Lin, L.
Xie, J.
Yan, X.
Xiao, W.
Tian, P.
Powiązania:
https://bibliotekanauki.pl/articles/778559.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ionic liquids based silica
pentafl uorobenzene
adsorption
solid-phase extraction
Opis:
The adsorption of pentafl uorobenzene on nine ionic liquid-based silicas was investigated using solid phase extraction. The effects of several variables such as the type of ionic liquid groups, adsorption time, temperatures and water ratio in the solution system were experimentally evaluated. The imidazole-chloride ionic liquid group based silica exhibited the highest adsorption efficiency under the optimized conditions of 5 min adsorption at 30°C in water/methanol (30:70, vol%) solution. In addition, the effects of pH, as well as type and concentrations of chloride salts were investigated. At pH values other than neutral and high salt concentration, the adsorption efficiency was reduced. Finally, the relative standard deviation of less than 5.8% over a 5-day period showed a high precision for the nine tested sorbents.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 3; 47-52
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antibiofilm activity against Staphylococcus aureus and content analysis of Taraxacum Officinale phenolic extract
Autorzy:
Xu, P.
Xu, X.B.
Khan, A.
Fotina, T.
Wang, S.H.
Powiązania:
https://bibliotekanauki.pl/articles/2087162.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Taraxacum Officinale
phenolic
antibacterial mechanism
HPLC
Staphylococcus aureus
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 2; 243-251
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:
Dynamic-accumulative operation policy of continuous distillation for the purification of anisole
Autorzy:
Wang, Z.
Li, S.
Wang, C.
Guo, X.
Bai, P.
Powiązania:
https://bibliotekanauki.pl/articles/779622.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
anisole recycling
dynamic-accumulative operation policy
continuous distillation
simulation
Opis:
In the B10 isotope enrichment industry, the purification of anisole mixture makes great sense. A dynamic-accumulative operation policy of continuous distillation (DACD) with repeated filling and dumping of the still is proposed for the separation of trace heavy impurities in the recycled anisole. To simulate and optimize the purification process of anisole, a mathematical model of DACD is derived, and the computer codes are developed in the MATLAB environment. Moreover, the experiment is performed in a pilot-scale distillation column. The results show that the experimental date agrees well with simulation results. DACD could solve the difficulty of flow rate control when the bottom flow rate is very small in continuous distillation. The size of the still in this operation mode is also smaller than that in batch distillation. And the yield of anisole is raised to 99.91%. In a word, DACD is especially suitable for separating trace heavy impurities from the recycled anisole.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 1; 33-39
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of synthesis conditions on the synthesis of carbon nanofibers by ethanol catalytic combustion
Wpływ warunków syntezy na syntezę nanowłókien węglowych metoda katalitycznego spalania etanolu
Autorzy:
Cheng, J.
Zou, X. P.
Zhu, G.
Wang, M. F.
Su, Y.
Yang, G. Q.
Lu, X. M.
Powiązania:
https://bibliotekanauki.pl/articles/354282.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
synteza
nanowłókna węglowe
spalanie
etanol
carbon nanofibers
ethanol catalytic combustion
influence factors
Opis:
In this paper, the effects of position of substrates in flames, preparation time, stability of flames and catalyst precursors on the synthesis of carbon nanofibers (CNFs) by ethanol catalytic combustion (ECC) were investigated. For investigating the effects of these influence factors on the synthesis of CNFs, several sets of controlled experiments were performed, such as preparation experiments with different position of substrates in flames, different preparation time, stable and unstable flames, and different catalyst precursors. In our experiments, the catalyst precursors were iron nitrate, cobalt nitrate, nickel nitrate, and iron chloride, cobalt chloride, nickel chloride. The as-synthesized products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy. Our results indicate that the optimal position of substrates in flames is more than 1cm and less than 2.5cm, the optimal preparation time is more than 5min and less than 30min for massive yield, stable flames would be tent to synthesize CNFs with mainly single-type morphology and could improve the graphitization of CNFs, and the catalyst precursors obviously have effects on the synthesis of CNFs.
W niniejszej pracy zbadany został wpływ położenia substratów w płomieniach, czasu przygotowania, stabilności płomieni i prekursorów katalizatora na syntezę nanowłókien węglowych (CNFs) metodaą katalitycznego spalania etanolu (ECC). W celu zbadania wpływu tych czynników na syntezę nanowłókien węglowych przeprowadzono kilka zestawów kontrolowanych eksperymentów, przy różnej pozycji podłoży w płomieniach, różnym czasie przygotowania, płomieniach stabilnych i niestabilnych i przy użyciu różnych prekursorów katalizatora. W naszych eksperymentach jako prekursory katalizatora stosowano azotany: żelaza, kobaltu i niklu oraz chlorki żelaza, kobaltu i niklu. Tak otrzymane produkty syntezy scharakteryzowano za pomocą skaningowej mikroskopii elektronowej (SEM), transmisyjnej mikroskopii elektronowej (TEM) i spektroskopii Raman'a. Nasze wyniki wskazują, że optymalna pozycja podłoży w płomieniach to więcej niż 1 cm i mniej niż 2,5 cm, a optymalny czas przygotowania to więcej niż 5 min i mniej niż 30 min dla dużej wydajności. Stabilność płomieni będzie sprzyjać syntezie nanowłókien o morfologii jednego typu i może poprawić ich grafityzacje, a rodzaj prekursora katalizatora ma wpływ na syntezę nanowłókien.
Źródło:
Archives of Metallurgy and Materials; 2012, 57, 3; 745-751
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enzymatic Polishing and Reactive Dyeing of Cotton Fabric in One Bath
Enzymatyczne polerowanie i reaktywne barwienie bawełnianych tkanin w systemie stosowania jednej kąpieli
Autorzy:
Wang, P.
Hong, Y.
Ding, Y.
Cui, L.
Yuan, J.
Wang, Q.
Fan, X.
Powiązania:
https://bibliotekanauki.pl/articles/232210.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
cotton fabric
neutral cellulase
reactive dye
one-bath method
colour strength
tkanina bawełniana
celulaza
reaktywne barwienie
metoda jednej kąpieli
siła koloru
Opis:
Cellulase has the ability to remove fuzz-fibres from cellulosic textiles, which endows fabric with a glabrous appearance and soft handle. In this paper, the combined uses of bio-polishing and reactive dyeing in one bath were carried out, aiming at shortening the treatment time and reducing the overall consumption of water and energy as well. The properties of cotton fabrics before and after the combined treatments were investigated, including the colour strength, colour fastnesses and tearing strength. The results indicated that the colour fixing agent of soda had noticeable inhibiting effects on cellulase activity. Meanwhile reactive dyes might react with cellulase proteins under alkaline conditions, resulting in decelerating influences on the dye-fibre covalent reactions. The acceptable one-bath process consisted of bio-polishing and dyeing of cotton in neutral solution, followed by dye fixation under alkaline conditions. Compared to polishing and dyeing in two baths, the one-bath method endowed fabric with a bit lower colour strength.
Celulaza ma zdolność do usuwania włosków zmechacenia z tekstyliów celulozowych, co pozwala na osiągnięcie gładkiej powierzchni o delikatnym chwycie. W pracy badano sumaryczny efekt biopolerowania i reaktywnego barwienia przeprowadzanych w jednej kąpieli. Metoda ta ma na celu skrócenie czasu obróbki i zredukowanie ogólnego zapotrzebowania na wodę i energię. Badano właściwości tkanin bawełnianych przed i po obróbce. Między innymi badano nasycenie kolorem, trwałość koloru i wytrzymałość na rozrywanie. Wyniki wskazują, że soda jako środek utrwalający kolor ma zauważalny wpływ na hamowanie działania celulazy. Porównując metodę równoczesnego polerowania i barwienia z metodą, gdzie obydwie obróbki stosowane są indywidualnie stwierdzono, że w metodzie równoczesnej obróbki uzyskuje się nieco niższe nasycenie koloru.
Źródło:
Fibres & Textiles in Eastern Europe; 2015, 1 (109); 109-113
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrogen sulfide is involved in the chilling stress response in Vitis vinifera L.
Autorzy:
Fu, P.
Wang, W.
Hou, L.
Liu, X.
Powiązania:
https://bibliotekanauki.pl/articles/56519.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
hydrogen sulphide
chilling stress
stress response
Vitis vinifera
Opis:
Hydrogen sulfide (H2S) is an important signaling molecule involved in several stress-resistance processes in plants, such as drought and heavy metal stresses. However, little is known about the roles of H2S in responses to chilling stress. In this paper, we demonstrated that chilling stress enhance the H2S levels, the H2S synthetase (L-/D-cysteine desulfhydrase, L/DCD) activities, and the expression of L/DCD gene in Vitis vinifera L. ‘F-242’. Furthermore, the seedlings were treated with sodium hydrosulfide (NaHS, a H2S donor) and hypotaurine (HT, a H2S scavenger) at 4°C to examine the effects of exogenous H2S on grape. The results revealed that the high activity of superoxide dismutase and enhanced expression of VvICE1 and VvCBF3 genes, but low level of superoxide anion radical, malondialdehyde content and cell membrane permeability were detected after addition of NaHS. In contrast, HT treatment displayed contrary effect under the chilling temperature. Taken together, these data suggested that H2S might be directly involved in the cold signal transduction pathway of grape.
Źródło:
Acta Societatis Botanicorum Poloniae; 2013, 82, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrogen sulfide modulates gastric acid secretion in rats via involvement of substance P and nuclear factor-kappaB signaling
Autorzy:
Sun, H.-Z.
Gong, X.-Y.
Wu, L.
Wang, X.-X.
Nie, Y.-N.
Shang, R.
Wang, H.
Li, Y.-C.
Sun, Q.-F.
Gao, P.-F.
Bi, J.-X.
Powiązania:
https://bibliotekanauki.pl/articles/69523.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
hydrogen sulphide
gastric acid secretion
rat
nuclear factor-kappaB
substance P
transient receptor potential vanilloid type 1
neurokinin-1
Źródło:
Journal of Physiology and Pharmacology; 2018, 69, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of Ephedra species by phylogenetic analyses using matK and ITS1 sequences
Autorzy:
Zhao, Y.S.
Xie, L.X.
Mao, F.Y.
Cao, Z.
Wang, W.P.
Zhao, Q.P.
Zhang, X.H.
Powiązania:
https://bibliotekanauki.pl/articles/56673.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
In this study, the species identifications of seven Ephedra plants, including three medicinal plants from the Pharmacopoeia of the People’s Republic of China, were conducted using phylogenetic analyses, and the method’s validity was verified. The phylogenetic trees constructed from the maturase-coding gene (matK) and internal transcribed spacer 1 (ITS1) sequences showed that the former could be used for identifying five Ephedra plants, Ephedra intermedia, E. equisetina, E. antisyphilitica, E. major, and E. aphylla, but it had less power to discriminate E. sinica and E. przewalskii, while the latter could distinguish five Ephedra plants, E. przewalskii, E. equisetina, E. antisyphilitica, E. major, and E. aphylla, but it had less power to discriminate E. sinica and E. intermedia. However, when the two genes were combined, the seven species could be completely distinguished from each other, especially the medicinal plants from the others, which is significant in developing their pharmaceutical uses and in performing quality control assessments of herbal medicines. The method presented here could be applied to the analysis of processed Ephedra plants and to the identification of the botanical origins of crude drugs. Additionally, we discovered that E. equisetina and E. major were probably closely related to each other, and that E. sinica, E. intermedia, and E. przewalskii also had a close genetic relationship.
Źródło:
Acta Societatis Botanicorum Poloniae; 2016, 85, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
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