Reaction of the -CH2OSiMe3 substituted allyldimesitylphosphane 5 with HB(C6F5)2 resulted in a hydroboration/(C6F5)2BOSiMe3 elimination sequence to give the phosphinomethyl substituted cyclopropane derivative , probably via a phosphiranium type intermediate. Addition of B(C6F5)3 to compound gave the stable phosphiranium/borate zwitterion that was isolated and characterized by X-ray diffraction.

The nonlinear propagation of electromagnetic waves in pair plasmas, in which the electrostatic potential plays a very important but subdominant role of a "binding glue" is investigated. Several mechanisms for structure formation are investigated, in particular, the "asymmetry" in the initial temperatures of the constituent species. It is shown that the temperature asymmetry leads to a (localizi...

We present a simple model for the formation of pairs in multi-agent populations of type A and B which move freely on a spatial network. Each agent of population A (and B) is labeled as Ai (and Bj) with i = 1, . . . , NA (and j = 1, . . . , NB) and carries its own individual list of characteristics or ‘phenotype’. When agents from opposite populations encounter one another on the network, they c...

We study a model 1-D system which describes two quasi-particles interacting with a nonlinear lattice. The quasi-particles are treated quantum mechanically, whereas the lattice is treated classically. For a range of model parameters, we find pairing between the two quasi-particles. We investigate the dynamical stability of such pairs, and comment on the possible applications to models of HTSC. T...

Three rapid spectrophotometric methods were developed for the determination of sunitinib based on the formation of ion-pair complex in acidic medium with bromocresol purple, bromothymol blue, and bromophenol blue. The formed ion-pair complexes, extractable with chloroform, were measured at 422 nm for bromocresol purple, 425 nm for bromothymol blue and 427 nm for bromophenol blue. All these meth...

The interactions two synthetic triazinyl reactive dyes Mono-s-chloro Triazinyl reactive dyes DI and DII with the cationic surfactant N-hexadecyl pyridinium chloride CPC were studied using a conductometric method in 25, 30, 35, 40 and 45ºC. The equilibrium constants and other thermodynamic parameters for the ion pair formation were calculated on the basis of a theoretical model using the data ob...

are pre-endowed with appendages, called donor pili, which are responsible for specific pair formation (C. C. Brinton, Trans. N.Y. Acad. Sci. 27:1003, 1965); this led us to believe that specific pair formation might occur in the absence of energy metabolism. However, K. W. Fisher (J. Gen. Microbiol. 16:136, 1957), in showing that zygote formation was dependent on active energy metabolism, conclu...