In a previous publication the purification and properties of two protein kinases (KI and KII) from a soluble fraction of bovine corpus luteum and the stimulation of the latter fol. Chem. 248,494-501). We have now studied the effects oc cyclic AMP and luteinizing hormone on ribosomal protein phosphorylation of corpus luteum by protein kinase II. Protein kinase II catalyzed the phosphorylation of...

The energy storage of photosynthesis in the green alga Chlorella vulgaris was determined by pulsed, time-resolved photoacoustics. The energy storage of the linear electron transfer process in photosynthesis, of cyclic photosystem (PS) I, and possibly of PSII was determined by selection of excitation wavelength and of flash interval. At 695 nm excitation, a rather large cyclic PSI energy storage...

We examined the patterns of cyclic AMP-dependent protein phosphorylation in membranes prepared from rat cortical synaptosomes following gel electrophoresis and autoradiography. We determined the optimum pH (6.2), time (20 s), Mg2+ concentration (10 mM) and cyclic AMP concentration (5 microM) for the reaction. We also found that the detergents Triton X-100 and gramicidin S enhanced cyclic AMP-de...

Stereo-specific perturbation of the IgE-receptor (shown in previous studies) produces a monophasic rise in cyclic AMP that peaks at 15 s and a depletion of cyclic AMP-dependent protein kinase that plateaus at 30-60 s. The previously observed linear relationship between the attenuation in the monophasic rise in cyclic AMP and the quantity of mediator release in the presence of incremental concen...

In this paper we present a construction for S-boxes using quasi-cyclic codes. We obtain S-boxes with good nonlinearity.

Resistance to cyclic flexural fatigue failure is an important feature of rotary nickel-titanium (NiTi) instruments. The aim of this study was to evaluate the cyclic flexural fatigue failure resistance of RevoS Shaper Universal rotary NiTi files and to compare it to two other rotary NiTi files with similar size and taper, the Hero Shaper and the ProFile. Fifteen each of Revo-S Shaper Universal, ...

This paper develops the theory of cyclic transfers, a neighborhood search strategy for a broad class of combinatorial problems. The problem class is characterized by a two-phase decision process: first, the optimal assignment of elements to clusters and, second, the optimal configuration of the elements within each cluster. Many important and difficult problems fall into this problem class, for...

In this paper we describe new parallel cyclic wavefront algo rithms for solving the semide nite discrete time Lyapunov equation for the Cholesky factor using Hammarling s method by the message passing para digm These algorithms are based on previous cyclic and modi ed cyclic algorithms designed for the parallel solution of triangular linear systems The experimental results obtained on an SGI Po...