90 resultados para Sr^2
Resumo:
VAMAVA-MACaCl_2SrCl_2BaCl_2 CuSO_4-IRNMRX-rayTGBaCl_2---COOHVA:MA = 1.1:1-CaCl_2SrCl_2 CuSO_4-BaCl_2Ca~(2+)Sr~(2+)Ba~(2+)BaCl_21.1:1--COOH
Resumo:
La_(1-x)Sr_xNiO_(3-)La_(1-4/3x)Th_xNiO_(3-)La_(2-x)Sr_xNiO_(4+)Ni~(3+)O~=LaNiO_(3-)Sr~(2+)X 0.3La_(1-4/3X)Th_xNiO_(3-)1/3XX 0.3Ni~(3+)La_2NiO_4LaNiO_3LaNiO_3La_2NiO_4La_(0.9)Sr_(0.1)NiO_63950 La_2NiO_(4+)Sr~(2+)Ni~(3+)Sr~(2+)La_(2-x)Sr_xNiO_(4+) X = 0.5La_(1.5)Sr_(0.5)NiO_(4+)La_(1.5)Sr_(0.5)NiO_(4.00)
Resumo:
Y_2Cu_2O_5 La_2CuO_41In_2Cu_2O_5 Y_2Cu_2O_5 2Ca~(2+) Y~(3+) Sr~(2+)La~(3+) Y_(2-x)Ca_xCu_2O_5 La_(2-x)Sr_xCuO_4 Cu~(3+)3Zn~(2+) Mg~(2+)Y_2Cu_2O_5 Cu~(2+) Cu~(2+) Weiss4 Cu~(2+) La~(3+) La_2CuO_4CuO_4 Neel N_2H_4 GC PCoPP/GC
Resumo:
Ras GTP GTP Sar1ArfSRRanRabRho Ras Sar1ArfRabRho -Ran Ras Ras 1 Ras GTP MglAMglA Ras Ras RanRabRho Ras Ras Sar1ArfSR MglA Ras Ras MglARas RanRabRho Ras Sar1Arf SR 2Ras Ras Sar1ArfRab Ran SR Rho Ras Ras 1 11 1 Sar11 SR3 ArfArf1Arl1Arl23 RabRab1 Rab6Rab111 Ran1 RhoRac1 RasRheB SRRho Ras Ras Ras 2Cavalier-Smith Ras Ras Ras Ras SR Rho Ras Ras
Resumo:
The Pb2+ luminescence in a series of silicate oxyapatites Me(2)(Y, Gd)(8)(SiO4)(6)O-2, Me(4)Y(6)(SiO4)(6)O (Me = Mg: Ca, Sr) is reported and discussed in relation to the crystal structure. The maximum wavelengths of the excitation (S-1(0)-P-3(1)) and emission (P-3(1)-S-1(0)) bands of Pb2+ are independent of the Mc:Y ratio (2:8 or 4:6) but they have lower energies in MgY-oxyapatites than in CaY- and SrY-oxyapatites. The Stokes shift of Pb2+ luminescence amounts to 11 100 to 11 400 cm(-1): which does not depend strongly on the host composition. There exists a mutual energy transfer between Pb2+ and Gd3+ in Sr2Gd8(SiO4)(6)O-2. At last, the dependence of the energy transfer efficiency of Pb2+-Sm3+, Tb3+: Dy3+ in Sr-2(La: Gd)(8)(SiO4)(6)O-2 and Ca-2(Y, Gd)(8)(SiO4)(6)O-2 on their doping concentrations was studied in more detail.
Resumo:
Laminaria japonicaSargassum pallidumS.kjellmanianum)s.thunbergii1. M/G1.861.501.221.27= (F_MG))/(F_M * F_G)0.620.130.360.412. Cd-SrM/GCu~(2+)MG-Sr~(2+)Ba~(2+)Cd~(2+)M-3. G-~(26)Cu~(2+)Sr~(2+) -COOHSr~(2+)Cu~(2+)Cu~(2+)Cu~(2+)Ca~(2+)Sr~(2+)4.
Resumo:
Using a recently developed technique to extract jellyfish venom from nematocysts, the present study investigated the hemolytic activity of Cyanea nozakii Kishinouye nematocyst venom on chicken erythrocytes. Venom extract caused a significant concentration-dependent hemolytic effect. The extract could retain its activity at -80 degrees C but was unstable when kept at 4 degrees C and -20 degrees C for 2 days. The hemolytic activity was inhibited by heating within the range of 37-100 degrees C. The extract was active over a pH range of 5.0-8.63 and the pH optima for the extract was 7.8. Incubation of the venom with sphingomyelin specially inhibited hemolytic activity by up to 70%. Cu2+ and Mn2+ greatly reduced the hemolytic activity while Mg2+, Sr2+ and Ba2+ produced a relatively low inhibiting effect on the hemolytic activity. Treatment with Ca2+ induced a concentration-dependent increase in the hemolytic activity. In the presence of 5 mM EDTA, all the hemolytic activity was lost, however, the venom containing 1.5 mM EDTA was stable in the long-term storage. PLA(2) activity was also found in the nematocyst venom of C. nozakii. These characteristics provide us a fundamental knowledge in the C. nozakii nematocyst venom which would benefit future research. (C) 2010 Published by Elsevier Ltd.
Resumo:
Sr^2+SrTZ^+2163meqL(TZ^+=0725meqL)Ca^2+HCO3^-Mg^2+SO4^2+Na^++K^+Cl^-+Si510Sr(11970mol/L)^87Sr^86Sr(0707707110)^87Sr^86Sr(0709007145)Sr(028132molL)3.
Resumo:
10%13% 1NPKCaMgS1000 g∙g-1 FeMnAl100 g∙g¬-11000 g∙g¬-1ZnSr10 g∙g¬-1100 g∙g¬-1CuMo10 g∙g¬-1Mo(0.17 g∙g¬-1)CaPK FeMnSSrMgCa>K>Mg 2NPKMgCaAlFeMnCuZnSrMoSAlFeMnSr100%NPKCaMgSCu60%Ca(11.8%)PKPCuAlFeAlZnFeZnNPPMgKAlKCuCaSrSMo 32MnAlSr2.11.51.4 413C15N34S-26.98-29.15-4.08-0.79-8.69-6.04-28.14-2.41-7.5313C15N34S 513C15N34S13C15N34S13C15N34S13C34S15N
Resumo:
COSr 1) FeMnSr Mn/Sr 2) -2-3 3) -2 4Locfit 12C CO2 4) (-11.75 ~ -21.13)(-5.14 ~-7.20)(-4.35 ~ -10.31)(-7.20-7.58-5.62-4.60-5.18-4.35) 5) -9.9-4.5 -3~-4FeMn (18O -3SMOW)5221 33 6) () 7)
Resumo:
--()(H_20FBP)REE3-LCT3~(87)Sr~(86)Sr-f1) Y-HoZr-HfNb-TaSr-Eu(Irber 1999Bau 1997)3(1999)Sba and Chappell(1999)S()REES()(2) Sr~(2+)Eu~(2+)3SrEuIIlIIIIVSrEu(16:0111.2)VVIVIIIVSrEu(2466514:9IV10000)SrEuSrEu300SrEuEu~(2+)(3) 3IIIIII(~(11)B)-41.11-30.90VVIVII(~(11)B)-15.23-9.20IV-39.1913.10BYAILi~(11)B3B(-41.1l39.01)---3BB(4)3(II)3BePREE3IP(0.42 wt0.22 wt)IIIP(0.21 wt0.50 wt)IIP(0.08wt)PWatson (1978)Ryerson and Hess(1980)Webster et a1(1997EhrenfriedersdorfBe
Resumo:
"()Sr~(87)Sr~(86)Sr~(87)Sr~(86)Sr222728~(87)Sr~(86)Sr~(87)Sr~(86)Sr(1)~(87)Rb~(87)Rb~(87)Sr~(87)Sr~(86)Sr~(87)Sr~(86)Sr(2)-~(87)Sr~(86)Sr-~(87)Sr~(86)Sr-SrCa(3)~(87)Sr~(86)Sr0.711900.712018~(87)Sr~(86)Sr0.7098070.709147O.7111(4)~(87)Sr~(86)SrSrCaMgCa(5)(1.OMa)
Resumo:
Theoretical researches were performed on the CaFe2O4-type binary rare earth oxides AR(2)O(4) (A = Ca, Sr, Ba; R = rare earths) by using chemical bond theory of dielectric description. The chemical bond properties of these crystals were explored, and then the thermal expansion property and compressibility were studied. The theoretical values of linear thermal expansion coefficient (LTEC) and bulk modulus were presented. The calculations revealed that the LTECs and the bulk moduli do have linear relationship with the ionic radii of the rare earths. In the cases of Sc and Y, both the LTEC and bulk modulus values are larger than the lanthanide series. We attribute this to the difference in the electronic configuration between Sc (Y) and lanthanide series. For SrY2O4 and BaY2O4 crystals, the theoretical values of LTEC and bulk modulus agree well with experimental ones.
Resumo:
By using the average band-gap model, the chemical bond properties of (La1-x, M-x)(2)CuO4(M=Ba, Sr) were calculated. The calculated covalencies for Cu-O and La-O bond in the compounds are 0.3 and 0.03 respectively. Mossbauer isomer shifts of Fe-57 doped in La2CuO4 and Sn-119 doped in La2CuO4 were calculated by using the chemical surrounding factor defined by covalency and electronic polarizability. Four valence state tin and three valence iron sites were identified in Fe-57 and Sn-119 doped La2CuO4.
