978 resultados para -Er^3
Resumo:
x-(1) ErCl_3 + C_6H_5CH_2C_5H_4Na (THF) C_6H_5CH_2C_5H_4ErCl_23THF + NaCl; (2)GuCl_3nTHF + C_9H_7K (THF) C_9H_7GuCl_23THF + Kcl; C_6H_5CH_2C_5H_4ErCl_23THFDMEEt_2OC_6H_5CH_2C_5H_4ErCl_23THF1600cm~(-1)1490cm~(-1)1450cm~(-1)700cm~(-1)2980cm~(-1)2880cm~(-1)CH_21600cm~(-1)1040cm~(-1)860cm~(-1)1060cm~(-1)910cm~(-1)460cm~(-1)Ln-ClIP21/na = 11.622A. b = 10.281A, c = 26.040A. = 86.65V = 3106.09AE = 4LR = 0.050Er~(3+)8C_9H_(17)GdCl_23THF1050cm~(-1), 900cm~(-1)845cm~(-1)1020cm~(-1)GuCl460cm~(-1)IIP21a = 10.468A, b = 11.888A, c = 11.854A, = 108.46, D = 1399.3A~3R = 0.042Gd-C2.739Gd-O2.444AGd-Cl2.583A2.721ACl(1)-Gd-Cl(2)158.0Cl(1)-Er-Cl(2)156.3C_9H_7GdCl_23THF158.0
Resumo:
IIIIIIN_(1923)IIIIIIHEHEHPIII1(N1923H)_2SO_4La(III)Fe(III)La~(3+),Fe~(3+),N1923,H~+,SO_4~(2-)(N1923H)_2SO_4La(III)Fe(III)2HEHEHPHCLNaCl-NaNO_3Er(III)Er~(3+)HEHEHPNO_3~-CL~-H~+HEHEHPEr(III)NO_3~-NaNO_33HEHEHPN1923Er(III)Er~(3+)HEHEHPN1923CL~-H~+HEHEHPEr(III)N1923N1923N19234HEHEHPHCl-NaCl-KSCNEr(III)Er~(3+)HEH(EHP) CL~-SCN~-H~+HEHEHPErIIIKSCN
Resumo:
99Er~(3+)~4I_(13/2)~4I_(15/2)T_dEr~(3+)~4E_(13/2)Stark_8,_6()~4I_(15/2)Stark9
Resumo:
a-Si:Ha-SiCx:H300 400 ,Er~(3+)4f1.54 m400 ,,
Resumo:
51.536m1.5541.570m1.5981.640m,1.536mT_dEr~(3+)ErONCEr-OEr-NEr-CPL1.570m1.536m1.608m
Resumo:
.,,.,GaAs,,,..SiGe,Er~(3+)-FeSi_2..
Resumo:
E2 13T3-L1 MCF-7MDA-MB-231 OVCAR-3OVCAR-4OVCAR-5OVCAR-8IGROV1 RT-PCR ELISA AroE2 Formestane SP25 2RNAi Aro3 RNAi Forskolin Formestane PCR RNA SP25 Aro 3ERE MDA-MB-231SP25 SP25 13T3-L1 MCF-7 MDA-MB-231 OVCAR-3OVCAR-4OVCAR-8 Formestane OVCAR-3 RNAi 2RNAi 3 RNAi R2 C2 R2 118 24 19 48 R2/C2 RNAi R2 OVCAR-3 2448 Formestane R2 0.83 0.04 Forskolin R2 3.61 1.84 R2 5.76 3.49SP25 R2 8.13 4.59 SP25 RNAi Aro 3pERE-pGL3-promoter SP25 ERER31 SP25ER RNA ELISAPCRSP25 SP25 a Estrogen is an important hormone that has versatile physiologicalfunctions. Lack of estrogen will lead to many diseases such as lower ovarianfunction, climacteric syndrome and osteoporosis. Excessive estrogen alsoinduces breast carcinoma, oophoroma and endometrial carcinoma and otherdiseases. To depress the estrogen level in tumor tissue to cure carcinomawas widely studied, but there is only few studies reported on the induction ofestrogen and on the regulation of ovary function. We found that the extracts from seeds of Styrax perkinsiae couldpromote the synthesis of estrogen. The active compounds benzofurans wereidentified. Effect of benzofurans may be related to aromatase, but the mechanism was not clear. To reveal the mechanism of these benzofurans to promote estrogensynthesis, the following protocols were adopted: 1 Cytology: 3T3-L1 preadipocytes,human ovary carcinoma celllines OVCAR-3,OVCAR-4,OVCAR-5,OVCAR-8,IGROV1 andbreast carcinoma cell lines MCF-7 and MDA-MB-231 were usedto determine Aro gene expression and estrogen production withRT-PCR AND ELISA methods. Formestane, an aromataseinhibitor, was used as positive control. And dose-curve,time-curve and the effective concentration of SP25 were also studied. 2 Designed 3 pairs of RNAi for human aromatase gene, andtransfected into cell. Aromatase inducer Forskolin andDexamethasone, and aromatase inhibitor Formestane were usedas positive controls. We studied the change of Aro expressionlevel with SP25 by using real-time PCR after RNA interfering. 3 Estrogen Receptor: We constructed the recombined Luciferasereport vector and establish a screening system for estrogenagonist and antagon. With this system, we studied the affinity ofSP25 and estrogen receptor. Results: 1 Differentiated 3T3-L1 preadipocyteshuman ovary carcinomacell lines:OVCAR-3, OVCAR-4, OVCAR-8 and breast carcinomacell lines MCF-7, MDA-MB-231 had detected aromatase geneexpression.And OVCAR-3 is more suitable for further aromatasegene function research. 2 In RNAi assay, R2 has a strong interfering effcet in OVCAR-3 cellline, and ratio of C2 (the negative control) to R2 were 118 times(24 hours) and 19 times (48 hours). This means sucessful inRNA interfering. After R2 acted on OVCAR-3 cell line, the ratiosof formestane to R2 were 0.83 and 0.04 times, 5.76 and 3.49times (Dex), 3.61 and 1.84 times (forskolin) and 8.13 and 4.59times (sp25) after drug treated 24 or 48 hours respectively.These results indicated that SP25 can directly induce aromatasegene up-regulation. 3 We had constructed pERE-pGL3-promoter recombined vectorand the Luciferase report gene screening system. Luciferasereport gene assay showed that sp25 had a higher affinity with strogen receptor alpha than estrogen receptor beta, this indicated that SP25 can act on estrogen receptor and induce aromatase. Our results revealed that the mechanisms of benzofuran to promoteestrogen were the upregulation aromatase gene expression and promotion ofaromatase activity and have partially elective affinity with estrogen receptoralpha.
Resumo:
A near-infrared luminescent macroporous material (PL-Macromaterial) and a near-infrared luminescent/magnetic bifunctional macroporous material (MML-Macromaterial) were synthesized by using polystyrene microspheres (PS) and Fe3O4 @polystyrene core-shell nanoparticles (Fe3O4@PS), respectively, as templates. Both the PL-Macromaterial and the M/PL-Macromaterial show the characteristic emission of the Er 3, ion. Moreover, the M/PL-Macromaterial possesses superparamagnetic properties at room temperature.
Resumo:
Y2O3,Yb2O3,Er2O3,NH4F,18010 hNH4Y1.56Yb0.4Er0.04F74002 h,Y0.78Yb0.2Er0.02F3ScherrerNH4Y2F7Yb^3,Er^3YF3Yb^3,Er^365.868.3 nm
Resumo:
The selective separation of Y from yttrium solution containing small heavy rare earth (HRE) impurities (Ho, Er, Tm, Yb, Lu) by liquid-liquid extraction using CA-100 in the presence of a water-soluble complexing agent of ethylenediaminetetraacetic acid (EDTA) was experimentally studied at 298K. Experiments were carried Out in two feeds, Feed-I: [RE](f) = 4.94 x 10(-3) M, Y = 98.5%, HRE (Ho, Er, Tm, Yb, Lu) = 1.5%; Feed-II: [RE](f) = 4.94 x 10(-3) M, Y = 99.9%, HRE (Ho, Er, Tm, Yb, Lu) = 0.1%, as a function of equilibrium pH (pH(eq)), the concentration ratio of [EDTA]:[HRE impurities]. It was shown that the extraction of HRE in the presence of EDTA was suppressed when compared to that of Y because of the masking effect, while the selective extraction of Y was enhanced and the separation factors increased to maximum at appropriate condition for Feed-I: Y/Ho = 1.53, Y/Er = 3.09, Y/Tm = 5.61, Y/Yb = 12.04, Y/Lu = 27.51 at pH 4.37 and [EDTA]:[HRE impurities] = 4: 1, for Feed-II: Y/Ho = 1.32, Y/Er = 1.91, Y/Tm = 2.00, Y/Yb = 3.05, Y/Lu = 3.33 at pH 4.42 and [EDTA]: [HRE impurities] = 8:1. The separation and purification of Y by this method was discussed.
Resumo:
CdSiO_3:RE~(3+)(RE=Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu)XRD10503CdSiO_3Y~(3+),La~(3+),Gd~(3+),Lu~(3+)Ce~(3+),Nd~(3+),Ho~(3+),Er~(3+),Tm~(3+),Yb~(3+)420 nm, Pr~(3+),Sm~(3+),Eu~(3+),Tb~(3+),Dy~(3+),420 nm,
Resumo:
,(GSH).GSH.Eu~(3+)12.50.1L/mol100.00.5L/mol.~(13)CpHpK_a2.200.023.500.04.Dy~(3+)Ho~(3+)Er~(3+)Tm~(3+) Yb~(3+),GSH~(13)C,,.
Resumo:
(2-)(H[DEHP])()()()(),H[DEHP]Sc~(3+)>Fe~(3+)>Lu~(3+)>Yb~(3+)>Er~(3+)>Y~(3+)>Ho~(3+)Sc()Fe()Y()Ln()()Fe()(),HEH[EHP]IRNMR,H[DEHP]Sc()Y()Ln(),
Resumo:
~1H~(13)C NMR(-,GA)Yb-Dy~(3+)Ho~(3+)Er~(3+)Tr~(3+)Yb~(3+)GA~(13)C,Reuben,Cl-C_2-N-C_3,C_2-N-C_3-C_4C_5-C_2-N-C_34
Resumo:
~(13)CDy~(3+)Ho~(3+)Er~(3+)Tm~(3+)Yb~(3+)~(13)C~1H,1
