Most known applications of saccharin and saccharyl derivatives and their potential for new uses rely on the thermal and photochemical stability of the saccharyl system. Here, we show that saccharin undergoes structural rearrangement when subjected to a narrow-band ultraviolet irradiation. Monomeric saccharin was isolated in low-temperature argon matrices and its photochemistry was characterized...

Obtaining quantities of highly pure duplex DNA is a bottleneck in the biophysical analysis of protein-DNA complexes. In traditional DNA purification methods, the individual cognate DNA strands are purified separately before annealing to form DNA duplexes. This approach works well for palindromic sequences, in which top and bottom strands are identical and duplex formation is typically complete....

M a g e d A . O s m a n * B r o w n Boveri Research Center, Chemistry Group, CH-5405 Baden-Dättwil , Switzerland Z. Naturforsch. 34b, 1092-1095 (1979); received March 23, 1979 Liquid Crystals, Nematic Phases, High Positive Dielectric Anisotropy, Alkylamino-cyano-b iphenyls , Alkylamino-cyano-phenylbenzoates Alky laminoand formyl a lkylamino-cyano Schif f 's base, biphenyl and phenylbenzoate l i...

The effect of plasma level of 5, 5-dimethyl-2, 4-oxazolidinedione (DMO) and of inhibitors of aqueous secretion on the distribution of DMO in intraocular fluids has been studied. Plasma levels of DMO from 35 to 60 mg./lOO ml. were required to obtain an appreciable excess of DMO in posterior and anterior aqueous humors compared with plasma. At plasma levels below 20 mg./lOO ml. the concentration ...

On the bases of the improved approximation for the spectral function of oneparticle states the Landau-Silin kinetic equations for the normal Fermi liquids of neutral and electrically charged particles are shown to be valid at finite temperature above the temperature of superfluid transition.

High-resolution two-dimensional electrophoresis is the only technique currently available which can resolve and map the very complex mixtures of proteins found in cells and body fluids. We review briefly the evolution of protein mapping by use of this technique and then discuss five major issues which will be important in the future. These are 1) development of standardized high-throughput comp...

in this paper, the concept of {sl local base with  stratifiedstructure} in $i$-topological vector spaces is introduced. weprove that every $i$-topological vector space has a balanced localbase with stratified structure. furthermore, a newcharacterization of $i$-topological vector spaces by means of thelocal base with stratified structure is given.

a simple, rapid and efficient dispersive liquid–liquid microextraction by use of ionic liquid (il-dllme)method, followed by flame atomic absorption spectrometry (faas) was developed for the preconcentrationand determination of palladium in water samples. in this method, an appropriate mixture of acetone and octylmethyl imidazolium hexafluorophosphate was injected rapidly into the aqueous sample...

Detailed observations of stratiform boundary layer clouds on 12 days are examined with specific reference to drizzle formation processes. The clouds differ considerably in mean thickness, liquid water path (LWP), and droplet concentration. Cloud-base precipitation rates differ by a factor of 20 between cases. The lowest precipitation rate is found in the case with the highest droplet concentrat...