Heteropolytungstates Containing Cobalt(II) or Cobalt(III)
نویسندگان
چکیده
منابع مشابه
Ribosomal Crystallography and Heteropolytungstates
Heteropolytungstates play a dual role in ribosomal crystallography. Beside generating phases, one of them, was found to be extremely useful in inducing post crystallization rearrangements. These led to a significant increase in the internal order of crystals of the small ribosomal subunits from Thermus thermophilus, manifested in a dramatic extension of the resolution of their diffraction patte...
متن کامل182tungsten Mössbauer spectroscopy of heteropolytungstates.
The tungsten-182 Mössbauer spectra of a series of Keggin structure heteropolytungstates, [EW12O40]n- are reported. There is a very considerable variation in quadrupole coupling at the tungsten nucleus indicating considerable asymmetry in the electron distribution for the more electronegative elements E. The quadrupole coupling correlates well with the structural data, in particular with the dis...
متن کاملSynthesis, Properties and Biological Activity of Organotitanium Substituted Heteropolytungstates
Six new compounds [(CpTi)X, Cp=upsilon(nabla)-c(nabla)H(nabla), X=Ge, Ga, B) have been prepared and their Keggin structures determined by elementary analysis, IR, UV, (infinity)H NMR and (infinity for all)WNMR spectrometry. The results show that the complexes retain Keggin structure. The complexes exhibit antitumoral activity in vitro as shown by MTT experiment.
متن کاملRecognizing Scenes Containing Consistent or Inconsistent Objects
How does object perception influence scene perception? A recent study of ultrarapid scene categorization (Joubert et al., 2007) reported facilitated scene categorization for scenes with consistent objects compared to scenes with inconsistent objects. One proposal for this consistent-object advantage is that ultrarapid scene categorization is influenced directly by explicit recognition of partic...
متن کاملReactivity of heteropolymolybdates and heteropolytungstates in the cationic polymerization of styrene.
The two heteropolyacids H(3)PW(12)O(40) and H(3)PMo(12)O(40), and their homologous salts (NH(4))(3)PW(12)O(40), and (NH(4))(3)PMo(12)O(40) were prepared and tested in the cationic polymerization of styrene. The results showed that the heteropolytungstates were more reactive than the heteropolymolybdates. It has been found that the yield and the viscosity average molecular weight (M(v)) of polys...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1976
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.49.87