119 resultados para CU2
Resumo:
Cu2+,pHCu2+Cu2+,;pH6Cu2+20 mg/L0.25 mm,,,Na+Ca2+Cu2+,0.1mol/L HCl96.1%Cu2+Thomas,10.94mg/gCu2+,
Resumo:
,Cu(I) 2-(2'-)(Hpbm)2-(2'-)(Hqbm)Cu(I)20wt%PMMA518.5-597.5nm0.097-0.249, 11.7-25.9µs 2, 2'-(H2dbm)Cu(I)Cu2(dbm)(PPh3)4PMMA (20 wt%)20wt%PMMA448.5475.5nm[Cu(Hdbm)(PPh3)]2[BF4]20wt%PMMA5110.150, 12.0
Resumo:
3(cdb3) BL21(DE3)pET28b-cdb337OD6000.61mM IPTG 30cdb3cdb3cdb3, cdb3- cdb3TrpGuHClcdb3 TrppH6.010.0cdb3Tm15pH 7.2pH9.2Cd2+Ca2+Cu2+Co2+Mg2 Zn2+cdb3Trp50Mcdb3cdb3N123TFETFE80% ATPcdb3ATP3mMcdb3
Resumo:
1XPS510-10 mol/L 2pHCl-pHN3N150mmol/L510-9 mol/L 3Gly-Gly-HisMPACu2+ Cu2+ Cu2+ Cu2+pH210-10 mol/L
Resumo:
1758-3600m 6175826203200350035873600m22540185225 1.2251028452251010928 1604511745B1394873U/ml16SrDNAB1394Bacillus subtilis60pH 8.0 405060 Mn2+ Mg2+ Ca2+Hg2+ Fe3+ Cu2+ Zn2+ Fe2+PMSF 2.10040 Rhizoctonia solaniCandida albicans373537%35%1845%SHA6Fusarium oxysporum10SHA6, SHA6Aurantimonas altamirensis 3.205SHA4100g/ml83%,400ppm48h38%SHA4Nocardiopsis sp
Resumo:
TCASTCASTCASTCASPb2+Cd2+Cu2+Zn2+26.32mg•g-118.12mg•g-112.24mg•g-16.85mg•g-19.23 mg•g-17.92 mg•g-16.73 mg•g-14.34 mg•g-1pHTCASTCASTCASTCASTCASTCASTCASCuZnCdPblg9.798.726.875.00TCASTCAS
Resumo:
CuCuPCu2Freundiichcu2Cu2Cu2Freundllch-Cu2Cu2+Cu2+Cu2PP
Resumo:
81Z(MMO)81ZPO43-(>8mM),NH4+([NH4cl]>500mg/l)[CuSO45H2O]04mg/l[Cu2+][Cu2+](0.1mg/l CuSO45H2O)Cocl26H2O(0.238mg/l)81ZMMO81ZMMOMMO,MMOLPH6.26.44[Cu2+]-400M[Cu2+][Cu2+]81ZMMCPH7.04DE-52ABC81ZMMO[Cu2+]PH6.35mMMMO15.9nmol/minmg0.97nmol/minmgSome factors which influence growth and MMO activity of Methylosporovibrio methanica 81Z were described. The growth of Methylosporovibrio methanica 81Z is inhibited by high concentration of PO43-(8mM)or NH4+(500mg/lNH4cl). The growth of Methylosporovibrio methanica 81Z increased with rising of copper concentration up to 4mg/l CuSO45H2O. At low copper concentration(0.1mg/lCuSO45H2O),adding Cocl26H2O(0.238mg/l)could enhance the growth of Methylosporovibrio methanica 81Z.With batch culture of Methylosporovibrio methanica 81Z in a fermentor, after lag phase, the activity of MMO reached the highest level rapidly and steady until later log phase, then falled to initial level.MMOL activity differenct from that of two types of MMO reported before was found from Methylosporovibrio methanica 81Z with optimum PH value from 6.2 to 6.4 and relative stabilty at 4. Synthsis of the MMOL was not regulated by copper concentaration in medium. Its activity could couple with methane-l-methanoldehydrogenase system, and in cell-free extract, were inhibited by 400m copper ion. At low copper concentration(0.1mg/lCuSO45H2O) and in a fermentor, Methylosporovibrio methanica 81Z could syntheis soluble MMO similar to solble MMO reported before by Palton and Patel. Its optimum PH value was 7.0. It was unstable at 4. It could be resoluted into three components: A, B, and C. It was effentive for obtaining the maxtmum MMO with Methylosporovibrio methanica 81Z that (1) to keep high copper concentration(4mg/lCuSO45H2O) in a fermentor and harvest cell at middlel lag phase;(2) to choose 6.3 as the PH value of reaction buffer;(3)and to add 5mM methanol or formate into reaction system. In this dy, the MMO activity of cells of Methylosporovibrio methanica 81Z was reached 15.9 nmol/min.mg, dry weight, sixteen times as high as the value(0.97nmol/min.mg, dry weight) reported with the same strain.
Resumo:
A modified microfiltration membrane has been prepared by blending a matrix polymer with a functional polymer. Cellulose acetate (CA) was blended with polyethyleneimine (PEI), which was then crosslinked by polyisocyanate, in a mixture of solvents. In the membrane, PEI can supply coupling sites for ligands in affinity separation or be used as ligands for metal chelating, removal of endotoxin or ion exchange. The effects of the time of phase inversion induced by water vapor, blended amount of PEI and amount of crosslinking agent on membrane performance were investigated. The prepared blend membranes have specific surface area of 12.04-24.11 m(2)/g and pure water flux (PWF) of 10-50 ml/cm(2) min with porosity of 63-75%. The membranes, made of 0.15 50 wt.% PEI/CA ratio and 0.5 crosslinking agent/PEI ratio, were applied to adsorbing Cu2+ and bovine serum albumin (BSA) individually. The maximum adsorption capacity of Cu2+ ion on the blend membrane is 7.42 mg/g dry membrane. The maximum adsorption capacities of BSA on the membranes with and without chelating Cu2+ ion are 86.6 and 43.8 mg/g dry membrane, respectively. (C) 2004 Elsevier B.V. All rights reserved.
Resumo:
(CMC):(AA)/=10,()(N,N-)0.00140.0015.,CMC400~45016h,Zn2+Cu2+Pb2+Cd2+Cr2+Ni2+Mn2+.,CMC,pH,pH9;CMCPb2+Cu2+.
Resumo:
Cu5102550100mgL-1,Cu:,Cu25100mgL-1,(P<0.05),05mgL-1,Cu,10100mgL-1,Cu2+;aba+bCu10100mgL-1,(P<0.05)Cu;:>>>>>>,Cu,Cu
Resumo:
Cu2+,pHCu2+Cu2+,;pH6Cu2+20 mg/L0.25 mm,,,Na+Ca2+Cu2+,0.1mol/L HCl96.1%Cu2+Thomas,10.94mg/gCu2+,
Resumo:
Cu2+.LangmuirFreundlich,,(Go)(Ho)(So).,Langmuir,RL01,;,Cu2+;HoSo12.206kJmol-121.534Jmol-1K-1,Go,Cu2+,,.LangmuirCu2+.
Resumo:
,,pH 2.0,4,30 g/L,1 h,4,Cd 98.9%Pb 99.6%Zn 98.9%Cu 98.7%;,4Cd 3.2Pb 90.8Zn 27.3Cu 52.4 mg/g;,60 minElovich,4,4Pb2+>Cd2+>Cu2+>Zn2+
Resumo:
Nanosized Ce1-xCuxOy materials were prepared by complexation-combustion method. The structural characteristics and redox behaviors were investigated using X-ray diffraction (XRD), temperature programmed reduction (H-2-TPR), UV-Vis, and Raman spectroscopies. In XRD patterns, no evidence of CuO diffraction peaks are observed for the Ce1-xCuxOy samples calcinated at 650 degreesC for 5 h, until the Cu/(Ce + Cu) ratio is higher than 0.4. The stepwise decrease of the 2theta value of CeO2 in Ce1-xCuxOy with the increasing of Cu concentration suggests that the CU2+ ions incorporate into the CeO2 lattice to form Ce1-xCuxOy solid solutions for low Cu/(Ce + Cu) ratios (x less than or equal to 0.1). The CuO phase begins to segregate from the solid solutions with the further increasing of Cu/(Ce+Cu) ratio. The Raman mode at 1176 cm(-1) ascribed to the enhanced defects appears for CeO2 and the Ce0.9Cu0.1Oy solid solution. Compared with CeO2 alone, the Raman mode of cubic CeO2 shifts from 462 to 443 cm(-1) for the Ce0.9Cu0.1Oy solid solution. The H-2 consumption of the fresh Ce0.95Cu0.05Oy is 1.65 times higher than that needed to reduce CuO to Cu, and it increases to 2.4 after a reoxidation of the partially reduced Ce0.95Cu0.05Oy at 300 degreesC, which indicates that the CeO2 phase is also extensively reduced. Compared with the high Cu/(Ce+Cu) ratio sample Ce0.7Cu0.3Oy, the Ce0.9Cu0.1Oy solid solution shows high and stable redox property even after different reoxidation temperatures. When the reoxidation temperature exceeds 200 degreesC, the a peak (similar to170 degreesC) ascribed to the reduction of surface oxygen disappears, and the P peak (similar to190 degreesC) ascribed to the reduction of Cu2+ species and the partial reduction of bulk CeO2 shifts to higher temperatures with the H-2 consumption 1.16 times higher than that for fresh sample. The result demonstrates that the redox property of the CeO2 is Significantly improved by forming the Ce1-xCuxOy solid solutions.
