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Wyświetlanie 1-15 z 36
Tytuł:
Chinese cabbage BrMYB34.2 transcription factor regulates indolic glucosinolates biosynthesis in Arabidopsis
Autorzy:
Zhao, Y.
Zhang, Y.
Guo, X.
Ma, Y.
Zhang, P.
Liu, H.
Liu, G.
Guo, J.
Powiązania:
https://bibliotekanauki.pl/articles/12705984.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Glucosinolates (GS) are a group of sulfur- and nitrogen-rich plant secondary metabolites that originate from amino acids and exist mainly in plants in the order Brassicales, such as Arabidopsis thaliana (Arabidopsis) and Chinese cabbage (Brassica rapa ssp. pekinensis). To date, several regulatory components responsible for GS biosynthesis have been identified in Arabidopsis. However, the functions of GS biosynthesis regulators in Chinese cabbage have not been clarified. In our current study, a putative ATR1/MYB34 orthologous gene, BrMYB34.2, was isolated from Chinese cabbage leaves. To investigate the function of this gene, we engineered Arabidopsis plants that overexpress BrMYB34.2 ectopically and phenotypic analysis was performed. Moreover, we assayed the accumulation levels of indolic GS (IGS) and aliphatic glucosinolates in transgenic plants and test the expression of key genes of IGS biosynthesis and tryptophan synthesis by Real-time quantitative PCR. And further analysed the resistance of transgenic plants in 5MT stress treatment. The results indicate that ectopic expression of the BrMYB34.2 gene in Arabidopsis was able to up-regulate the accumulation level of IGS due to the increased expression of IGS and Trp biosynthetic genes. Moreover, overexpression of BrMYB34.2 conferred Arabidopsis 5MT resistance. These results suggest that the BrMYB34.2 gene may function as one of the regulators of IGS and Trp biosynthesis in Chinese cabbage.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 1; 85-95
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application the optimization models to analysis of the industrial pollutant emission in China
Autorzy:
Zhang, Z.
Liu, G.-D.
Guo, H.
Liu, L.
Deng, S.-H.
Powiązania:
https://bibliotekanauki.pl/articles/950041.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
industrial emissions
air pollution
mathematical models
sulfur dioxide
air pollutant emission
environmental indicators
industrial pollutants
smoke emission
emisja przemysłowa
zanieczyszczenie powietrza
model matematyczny
dwutlenek siarki
ditlenek siarki
emisja zanieczyszczeń powietrza
wskaźniki środowiskowe
zanieczyszczenia przemysłowe
emisja dymu
Opis:
An industrial planning is made based on the optimization model. Factor analysis was used to reject relativity among the environmental indicators. Then, thirty nine industries were clustered into four clusters. Lastly, optimization model was used to plan the industrial structure. Adjusting the industrial structure, it is difficult to reduce vast SO2, smoke, and dust with total industrial output value growth; the air pollutant emission only can be decreased by 10%. The parameters of smoke emission are limited constrains for the optimization. The reasonable and feasible way to solve the problem is to introduce the lower smoke emission technique of the cluster 2 and 4 industries.
Źródło:
Environment Protection Engineering; 2013, 39, 1; 87-99
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usefulness of nonlinear interpolation and particle filter in Zigbee indoor positioning
Wykorzystanie nieliniowej interpolacji oraz filtru cząsteczkowego w pozycjonowaniu wewnątrz pomieszczeń przy użyciu technologii Zigbee
Autorzy:
Zhang, X.
Guo, H.
Wu, H.
Uradziński, M.
Powiązania:
https://bibliotekanauki.pl/articles/145368.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
technologia ZigBee
kalibracja obszaru lokalizacji
algorytm pozycjonowania
fingerprint positioning algorithm
RSSI
ZigBee sensor networks
polynomial interpolation
particle filter
Opis:
The key to fingerprint positioning algorithm is establishing effective fingerprint information database based on different reference nodes of received signal strength indicator (RSSI). Traditional method is to set the location area calibration multiple information sampling points, and collection of a large number sample data what is very time consuming. With Zigbee sensor networks as platform, considering the influence of positioning signal interference, we proposed an improved algorithm of getting virtual database based on polynomial interpolation, while the pre-estimated result was disposed by particle filter. Experimental result shows that this method can generate a quick, simple fine-grained localization information database, and improve the positioning accuracy at the same time.
Kluczem do algorytmu pozycjonowania wykorzystującego metodę fingerprinting jest ustanowienie skutecznej bazy danych na podstawie informacji z radiowych nadajników referencyjnych przy wykorzystaniu wskaźnika mocy odbieranego sygnału (RSSI). Tradycyjna metoda oparta jest na przeprowadzeniu kalibracji obszaru lokalizacji na podstawie wielu punktów pomiarowych i otrzymaniu dużej liczby próbek, co jest bardzo czasochłonne.
Źródło:
Geodesy and Cartography; 2014, 63, 2; 219-233
2080-6736
2300-2581
Pojawia się w:
Geodesy and Cartography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fatigue damage of V-lock chain ring under random load
Autorzy:
Zhang, Q.
Wang, H.
Guo, T.
Powiązania:
https://bibliotekanauki.pl/articles/259449.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
V-lock chain ring for mining
dynamic model
fatigue damage
random load
finite element
sensitivity analysis
Opis:
To study the influence of the random load on the V-lock chain ring for mining, the numerical simulation technology is used. The dynamic tension is obtained by using the dynamic model of the plough. The life and damage nephograms are obtained by using ANSYS Workbench. The analysis results show that the short fatigue life region of the V-lock chain ring for mining is mainly concentrated on the transition region between the medial straight edge and arc, and the fatigue damage of the link chain on the side of the motion direction of the plow head is larger than that on the other side. This link chain has strong anti-fatigue performance.
Źródło:
Polish Maritime Research; 2016, S 1; 4-9
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Thermal Behaviour of CL-20, Potassium Perchlorate, Lithium Perchlorate and Their Admixtures by DSC and TG
Autorzy:
Zhang, J.-J.
Guo, X.-J.
Jiao, Q.-J.
Zhang, H.-L.
Li, H.
Powiązania:
https://bibliotekanauki.pl/articles/358770.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
CL-20
potassium perchlorate
lithium perchlorate
thermal stability
phase transition
Opis:
The thermal decomposition characteristics of CL-20, potassium perchlorate (KP), lithium perchlorate (LP), a CL-20/KP mixture, and a CL-20/LP mixture were studied using thermogravimetry-differential scanning calorimetry (TG-DSC). The DSC curves for KP exhibited three endothermic peaks and one exothermic peak. The first two endothermic peaks correspond to the rhombic-cubic transition and the fusion of KP, respectively, the third indicates the fusion of KCl, while the exothermic peak is attributed to the decomposition of KP. The DSC curves obtained from LP showed four endothermic peaks and one exothermic peak. The first two endothermic peaks indicate the loss of adsorbed water and water of crystallization, while the third and fourth are associated with the fusion of LP and LiCl, respectively; the exothermic peak is due to the decomposition of LP. The presence of KP had little effect on the thermal decomposition of CL-20 while the addition of LP increased the temperature at which CL-20 exhibits an exothermic peak. In addition, the thermal decomposition of LP appeared to be catalyzed by the presence of CL-20.
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 1; 115-130
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorptive performance of MCM-41 towards hg(II) in water. Adsorption and desorption studies
Autorzy:
Zhai, Q. Z.
Hu, W.-H.
Guo, X.-Y.
Powiązania:
https://bibliotekanauki.pl/articles/208154.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
electron microscopy
mesoporous silicates
cetyltrimethylammonium bromide
adsorption conditions
mikroskopia elektronowa
krzemiany mezoporowate
bromek cetyltrimethylammonium
warunki adsorpcyjne
Opis:
MCM-41 mesoporous material was prepared under a standard conditions by using cetyltrime-thylammonium bromide as a structure-directing agent and tetraethyl orthosilicate as silica source from the liquid phase at 80 °C. Powder X-ray diffraction and scanning electron microscopy used to characterize the product, showed that the MCM-41material had an average particle size of 110 nm. The synthesized material was used to investigate the effects of acidity, adsorption time, the concentration of Hg2+, adsorbent dosage and temperature on the adsorption of Hg2+. The results showed that the optimal adsorptive conditions were: pH 5.0, m(MCM-41):mHg2+ 6.67, temperature 20 °C and contact adsorption time 60 min, for the initial Hg2+concentration of 1.0 mg/cm3. The maximum adsorptive amount of Hg2+ was 56.48 mg Hg2+/g MCM-41. The results of the desorptive effect of three desorption agents such as HCl, HNO3 and HAc showed that the best desorbent was HCl at the concentration of 0.10 mol/dm3. The highest desorption efficiency was 77.21% for the desorption time 2 h.
Źródło:
Environment Protection Engineering; 2016, 42, 1; 5-15
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution and sources of n-alkanes in surface sediments of Taihu Lake, China
Autorzy:
Yu, Y.
Li, Y.
Guo, Z.
Zou, H.
Powiązania:
https://bibliotekanauki.pl/articles/205298.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
n-alkanes
surface sediments
Taihu Lake
Opis:
The last study on n-alkanes in surface sediments of Taihu Lake was in 2000, only 13 surface sediment samples were analysed, in order to have a comprehensive and up-to-date understanding of n-alkanes in the surface sediments of Taihu Lake, 41 surface sediment samples were analyzed by GC-MS. C10 to C37 were detected, the total concentrations of n-alkanes ranged from 2109 ng g−1 to 9096 ng gg−1 (dry weight). There was strong odd carbon predominance in long chain n-alkanes and even carbon predominance in short chain n-alkanes. When this finding was combined with the analysis results of wax n-alkanes (WaxCn), carbon preference index (CPI), unresolved complex mixture (UCM), hopanes and steranes, it was considered that the long chain n-alkanes were mainly from terrigenous higher plants, and that the short chain n-alkanes mainly originated from bacteria and algae in the lake, compared with previous studies, there were no obvious anthropogenic petrogenic inputs. Terrestrial and aquatic hydrocarbons ratio (TAR) and C21−/C25+ indicated that terrigenous input was higher than aquatic sources and the nearshore n-alkanes were mainly from land-derived sources. Moreover, the distribution of short chain n-alkanes presented a relatively uniform pattern, while the long chain n-alkanes presented a trend that concentrations dropped from nearshore places to the middle of lake.
Źródło:
Archives of Environmental Protection; 2016, 42, 1; 49-55
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A First Principle Study of Antifluorite $Be_2X$ (X = C, Si) Polymorph
Autorzy:
Yan, H.
Wei, Q.
Chang, S.
Guo, P.
Powiązania:
https://bibliotekanauki.pl/articles/1505408.pdf
Data publikacji:
2011-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.15.Mb
71.20.Nr
78.20.Ci
Opis:
The crystal structure, electronic, and mechanical properties of antifluorite $Be_2X$ (X = C, Si) are calculated using the first-principles method based on density functional theory. Our calculated lattice parameters at equilibrium volume are in good agreement with the experimental data and other theoretical calculations. In order to obtain further information, the mechanical properties including bulk modulus, shear modulus, Young's modulus, and Poisson's ratio are deduced from calculated elastic constants. Meanwhile, the sound velocity and Debye temperature are also predicted. The bonding nature in $Be_2X$ (X = C, Si) is a complex mixture of covalent and ionic characters.
Źródło:
Acta Physica Polonica A; 2011, 119, 3; 442-446
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combustion Characteristics and Mechanism of Boron-based, Fuel-rich Propellants with Agglomerated Boron Powder
Autorzy:
Xu, H. -X.
Pang, W.-Q.
Guo, H.-W.
Zhao, F.-Q.
Wang, Y.
Sun, Z.-H.
Powiązania:
https://bibliotekanauki.pl/articles/358733.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
analytical chemistry
boron-based fuel-rich solid propellants
agglomerated boron powder
combustion performance
combustion mechanism
Opis:
In order to extend the burning rate of boron-based, fuel-rich solid propellants with agglomerated boron powder, the effects of the boron content, the AP content, and of the magnesium powder content, on the burning rate and pressure exponent have been studied systematically. It has been shown that when the AP content is constant, the burning rate of the propellants increases with an increase in the agglomerated boron content. Furthermore, the burning rate and pressure exponent increase with increasing the contents of AP and magnesium powder. By means of single colour frame amplification photography and combustion wave tests, the combustion mechanism of these propellants has been investigated. It has been shown that the flame of the propellants becomes brighter by increasing the AP content, the dT/dxcp and dT/dxgp of the propellant FR-5 being around 6815 and 5789 °C/mm respectively, higher than those of FR-4, resulting in greater burning rates. The Ts of these propellants is above 683 °C, which is higher than the decomposition peak temperatures of agglomerated boron powder and of propellants (about 649 °C), which indicates that agglomerated boron powder is partially oxidized on the combustion surface, and the heat released from it may be beneficial to the combustion of the propellants.
Źródło:
Central European Journal of Energetic Materials; 2014, 11, 4; 575-587
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel approach to photonic generation of periodic triangular radio frequency waveforms
Autorzy:
Xiang, P.
Guo, H.
Chen, D.
Zhu, H.
Wu, C.
Powiązania:
https://bibliotekanauki.pl/articles/174643.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
microwave photonics
triangular waveform
polarization modulator (PolM)
microwave photonic filter (MPF)
radio frequency (RF) waveform generation
Opis:
A novel approach to photonic generation of triangular radio frequency waveforms with a tunable repetition rate is proposed and analyzed. In the proposed system, a continuous-wave light is modulated by a reference microwave signal through a polarization modulator, and then its output optical sidebands are manipulated by a microwave photonic filter with a negative tap. By properly adjusting the system parameters, full-duty-cycle triangular radio frequency waveforms can be generated after optical-to-electrical conversion, and its repetition rate (frequency) can be tuned in a wide range. A model describing the proposed system is derived, which is verified via computer simulations.
Źródło:
Optica Applicata; 2015, 45, 3; 381-391
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Utilization of cement and other additives for solidification/stabilization of soil contaminated simultaneously with Cd2+ and Pb2+ ions
Autorzy:
Xi, Y.
Wang, H.
Guo, L.
Zhang, M.
Powiązania:
https://bibliotekanauki.pl/articles/208172.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
cement
soil pollution
X-ray diffraction
dyfrakcja rentgenowska
zanieczyszczenie gleby
Opis:
Various additives, including cement, quicklime, fly ash, montmorillonite, sepiolite and their proportions were employed to stabilize/solidify artificially prepared soils contaminated simultaneously with two kinds of ions such as Cd2+ and Pb2+. The unconfined compressive strength of the stabilized soils was measured to estimate the possibility of recycling. The efficiency of Cd2+ and Pb2+ immobilization in contaminated soils was also evaluated using the US EPA TCLP toxicity test. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to elucidate the mechanisms responsible for the immobilization of heavy metals. The experimental results demonstrate that in terms of soils simultaneously polluted with Cd2+ and Pb2+ ions, the curing effect of fly ash is better than that of montmorillonite and sepiolite. When Cd2+ and Pb2+ coexist in soil specimens, the curing is more difficult than for Cd2+ or Pb2+ alone, which is antagonistic mechanism. Also, the leaching concentration of Cd2+ and Pb2+ gradually decreases upon increasing pH when pH < 8. For pH ≥ 8, the leaching concentration of Cd2+ and Pb2+ reached a minimum. Besides, the results of XRD and SEM are in agreement with those of the strength and leaching tests.
Źródło:
Environment Protection Engineering; 2018, 44, 1; 61-73
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
pUC18-CpG stimulates RAW 264.7 via TBK1-mediated pathway and presents adjuvanticity in mice
Autorzy:
Wu, J.
Chen, Q.
Xin, T.
Sun, Y.
Jia, H.
Hou, S.H.
Guo, X.Y.
Powiązania:
https://bibliotekanauki.pl/articles/2087554.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adjuvant
CpG DNA
Echinococcus granulosus
TBK1
type I interferons
Źródło:
Polish Journal of Veterinary Sciences; 2019, 2; 195-201
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement-based harmonic current modeling of mobile storage for power quality study in the distribution system
Autorzy:
Wenge, C.
Guo, H.
Roehrig, C.
Powiązania:
https://bibliotekanauki.pl/articles/140847.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electrical vehicle
harmonic load modeling
harmonic measurement in power system
power quality
power system harmonics
Opis:
Electric vehicles (EVs) can be utilized as mobile storages in a power system. The use of battery chargers can cause current harmonics in the supplied AC system. In order to analyze the impact of different EVs with regardto their number and their emission of current harmonics, a generic harmonic current model of EV types was built and implemented in the power system simulation tool PSS®NETOMAC. Based on the measurement data for different types of EVs three standardized harmonic EV models were developed and parametrized. Further, the identified harmonic models are used by the computation of load flow in a modeled, German power distribution system. As a benchmark, a case scenario was studied regarding a high market penetration of EVs in the year 2030 for Germany. The impact of the EV charging on the power distribution system was analyzed and evaluated with valid power quality standards.
Źródło:
Archives of Electrical Engineering; 2017, 66, 4; 801-814
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a blocking immunoperoxidase monolayer assay for differentiation between pseudorabies virus-infected and vaccinated animals
Autorzy:
Wang, Y.B.
Li, Y.H.
Li, Q.M.
Xie, W.T.
Guo, C.L.
Guo, J.Q.
Deng, R.G.
Zhang, G.P.
Powiązania:
https://bibliotekanauki.pl/articles/2087396.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pseudorabies virus variant strains
anti-pseudorabies virus monoclonal antibody
blocking immunoperoxidase monolayer assay
differentiation between pseudorabies virus-infected and vaccinated animals
Źródło:
Polish Journal of Veterinary Sciences; 2019, 4; 717-723
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of usefulness of the mems-based integrated navigation unit in car navigation
Autorzy:
Uradziński, M.
Rapiński, J.
Tomaszewski, D.
Śmieja, M.
Guo, H.
Yu, S.
Jian, X.
Powiązania:
https://bibliotekanauki.pl/articles/298138.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
MEMS
inertial navigation
GNSS
GNSS/IMU integration
car navigation
Opis:
Due to the development of MEMS, there is an opportunity to build a low-cost integrated navigation systems, operating independently of horizon visibility. This paper presents the proposal of an integrated GPS/IMU platform using MEMS technology. In order to verify the performance of a system built at the University of Warmia and Mazury, an experiment was conducted. In this experiment a precise Javad GNSS receiver, commercial grade GPS/IMU XW – ADU5660 and own-built system were used. The experiment was conducted to compare the results obtained from self built device with the working military integrated navigation unit. During the study all three devices were mounted inside moving vehicle. The car drove route inside the Kortowo campus, during which, all equipment performed measurements. Then, the results from both integrated systems were compared with RTK (Real Time Kinematic) results from Javad receiver. Experiments prove that the performance of own device is comparable to the commercial device.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2017, 20(4); 321-331
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 36

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