72 resultados para 16:1(n-7) 16:1(n-5) 20:5(n-3)
Resumo:
,(OTFTs),[1].OTFT.OTFTs5cm2/(Vs)[2];[01~1cm2/(Vs)][3].,(HOMO),,,,[4~6].,.,HOMO[7].,[8].[3,2-b],2,2-,HOMO,[9].2,5-(2-)-[3,2-b](PhTT),,...
Resumo:
Eu~(3+)D~(3+)YV_(1-x)B_xO_(4-x):B~(3+)V~(5+),Dy~(3+),B~(3+)Y~(3+),Dy~(3+)Bi~(3+)YV_(0.69)B_(0.31)O_(3.69):Dy~(3+)Dy~(3+)
Resumo:
The title compound 1-(4,5-dihydro-3-phenylpyridine-1-yl)-2-(1H-1,2,4-triazole-1-yl)ethyl ketone (DTE) was synthesized and its inhibiting action on the corrosion of mild steel in 1 M hydrochloric acid solutions was investigated by means of weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electronic microscope (SEM). Results obtained revealed that DIE performed excellently as a corrosion inhibitor for mild steel in 1 M hydrochloric acid media and its efficiency attains more than 90.9% at 1.0 x 10(-3) M at 298 K. Polarization curves indicated that the inhibitor behave mainly as mixed-type inhibitor. EIS showed that the charge transfer controls the corrosion process in the uninhibited and inhibited solutions. Adsorption of the inhibitor on the mild steel surface followed Langmuir adsorption isotherm. And the values of the free energy of adsorption Delta G(ads) indicated that the adsorption of DTE molecule was a spontaneous process and was typical of chemisorption. (c) 2008 Elsevier B.V. All rights reserved.
Resumo:
In this work, microwave dielectric properties of A-site substitution by La3+ in (Pb0.45Ca0.55) (Fe0.5Nb0.5) 03 system were investigated. Microwave dielectric properties of A-site charge unbalance substitution of [(Pb0.45Ca0.55)(1-x) La-x] (Fe0.5Nb0.5)O-3(+) (P45CLFN) were improved because the solid solution of small amount of surplus La3+ with (Pb, Ca)(2+) could eliminate oxygen vacancies, and the formation of secondary phase (pyrochlore) was also caused by surplus La3+. The decreasing of dielectric constant with the increase of La3+ content is due to the formation of pyrochlore. The grain size is changed slightly and Q(f) values (7000 similar to 7300 GHz) are almost unchanged at x = 0.02 similar to 0.10, but the temperature coefficient of resonant frequency (TCF) are increased and changed from negative to positive. TCF is zero at x 0.075 with Q(f) = 7267 GHz and K = 89. TCF of all specimens are within +/- 5 x 10(-6)degrees C-1.
Resumo:
714 1); 2); 3); 4)1-2; 5)2-3; 6); 7) (1)J;(2)(3) (1997) ;
Resumo:
,,d7,70.6%87.5%,36.7%66.1%82.5%,33.3%,0,13.3hm~(2)27a,83.7%35.0hm~(2)15a,84.1%
Resumo:
: 70 74 % ; ( ) 80 97% 15 92 % 1 11% 1 0 1% 0 99% 4 37kJ/gE/P 2 7 4 5kJ/g 17 , 6 9 0 7% ( ) ;9 34 81% ,5 0 3
Resumo:
1987319883337.6127.796.9t;100.550.340.2t12.3kg/;11kg/
Resumo:
Macaca thibetana-(19971-9)815+--triad4.5-18207.9%(9.57%5.56%)3.9-14.6200.92/0.03/triadtriadTriad-
Resumo:
InIn_xGa_(1-x)As(0x0.3)InAsInAsInGaAsGaAsx=0.3InGaAsInAsxInAs
Resumo:
11N,GANILMSU ,R, 11N:1/2+,1/2-,5/2+,3/2+,3/2-,5/2+,7/2-,11BeGCM 11N
Resumo:
The excitation functions of elastic scattering proton which were measured with inverse kinematics of elastic resonance scattering reactions in GANIL and MSU have been fitted by the multi-energy level R-matrix theory. The final result shows that the new energy levels order for nucleus N-11 should be 1/2(+), 1/2(-), 5/2(+), 3/2(+), 3/2(-), 5/2(+), 7/2(-), which is consistent with the experimental results of Be-11 (the mirror nucleus of N-11) and the theoretical calculation of N-11 with GCM theory.
Resumo:
3(Boletussp.Lactariussp.Macrolepiota procera),pHPEG,,3pH(3~7)(P<0.05);537,3,:,25,25~28,,25~30;PEG(10%,-0.20MPa),3,PEG30%(-1.53 MPa),3,pH;3;(1996),(5~9),,,,,,
Resumo:
Nanocrystalline Y3Al5O12: Ce3+/Tb3+ ( average crystalline size 30 nm) phosphor layers were coated on non-aggregated, monodisperse and spherical SiO2 particles by the sol-gel method, resulting in the formation of core-shell structured SiO2@Y3Al5O12:Ce3+/Tb3+ particles. X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, photoluminescence, cathodoluminescence spectra, as well as lifetimes were utilized to characterize the core-shell structured SiO2@Y3Al5O12: Ce3+/Tb3+ phosphor particles. The obtained core-shell structured phosphors consist of well-dispersed submicron spherical particles with a narrow size distribution. The thickness of the Y3Al5O12:Ce3+/Tb3+ shells on the SiO2 cores ( average size about 500 nm, crystalline size about 30 nm) could be easily tailored by varying the number of deposition cycles (100 nm for four deposition cycles). Under the excitation of ultraviolet and low-voltage electron beams (1-3 kV), the core-shell SiO2@Y3Al5O12:Ce3+/ Tb3+ particles show strong yellow-green and green emission corresponding to the 5d-4f emission of Ce3+ and D-5(4)-F-7(J) ( J = 6, 5, 4, 3) emission of Tb3+, respectively.
