Now showing items 21-30 of 69
Flash-induced enhancements in the proton NMR relaxation rate of Photosystem II particles
(Elsevier, 1986-07-02)
Flash-induced enhancements in the NMR spin-lattice relaxation rate of solvent protons have been detected in suspensions of Photosystem II particles. The relaxation enhancements are small (less than 1% of background) and ...
Electron spin resonance spectra of some paramagnetic hydride complexes of niobium(IV) and tantalum(IV)
(Elsevier, 1986-03-03)
Frozen solution electron spin resonance spectra show that the unpaired electron is in a dx2-y2 orbital on the metal in the complexes TaCl2H2(drnpe)2, TaCl2H2(PMe3)4 and NbCl2 H2 (dmpe)2, (dmpe = Me2- PCH2CH2PMe2).
The exchange reaction of tetramethyl-diphosphine, -diarsine, -distibine and -dibismuthine
(Elsevier, 1986-04-08)
Tetramethyldiphosphine and tetramethyldiarsine undergo an exchange reaction to give (dimethylarsino)dimethylphosphine. The equilibrium constant at 25[deg]C in benzene is found to be 0.26. Similarly, mixtures of ...
Cyanobacterial and chloroplast F1-ATPases: cross-reconstitution of photophosphorylation and subunit immunological relationships
(Elsevier, 1986-09-10)
The photosynthetic F1-ATPase from the cyanobacterium Spirulina platensis was recently purified in a five-subunit, reconstitutively active form (Hicks, D.B. and Yocum, C.F. (1986) Arch. Biochem. Biophys. 245, 220-229). Here ...
Character of adsorbed bovine serum albumin from adsorption enthalpies
(Elsevier, 1986-09)
Heats of adsorption of BSA onto polystyrene and polycarbonate were determined microcalorimetrically. The polymers were coated onto 50 nm alumina particles which were immersed in buffer for the measurements. Experimental ...
Studies on the spin-spin interaction between flavin and iron-sulfur cluster in an iron-sulfur flavoprotein
(Elsevier, 1986-01-17)
When the di- or trimethylamine dehydrogenases (trimethylamine:(acceptor) oxidoreductase (demethylating), EC 1.5.99.7) of certain methylotrophic bacteria are reduced by two electrons with substrate unusual EPR signals arise ...
Longitudinal acoustic mode in polymers. VIII. Nature of mass perturbations in terminally brominated paraffins
(John Wiley & Sons, Inc., 1986-07)
Raman spectra have been obtained of the longitudinal acoustic mode (LAM) in Α-BrC 20 H 41 and Α, Ω-BrC 20 H 40 Br, and compared with such spectra for n -C 20 H 42 . Normal coordinate analyses of these three molecules ...
Additions of allylboronates to sulfenimides
(Elsevier, 1986)
The addition of allyllioronates to sulfenimines gives homoallylsulfenamides which are potentially versatile Intermediates for alkaloid synthesis.
Toughening mechanisms in elastomer-modified epoxies
(Kluwer Academic Publishers; Chapman and Hall Ltd. ; Springer Science+Business Media, 1986-07)
The toughening mechanisms of elastomer-modified epoxies are examined by scanning electron microscopy, transmission electron microscopy, and optical microscopy, DGEBA epoxies toughened by various levels of several types of ...
Atomic Physicochemical Parameters for Three-Dimensional Structure-Directed Quantitative Structure-Activity Relationships I. Partition Coefficients as a Measure of Hydrophobicity
(John Wiley & Sons, Inc., 1986-08)
Earlier we showed (A. K. Ghose and G. M. Crippen, J. Med. Chem. , 28, 333, 1985) the necessity of atomic physicochemical parameters in three-dimensional receptor mapping. Here we derive more refined and widely applicable ...