Fluorescence spectra and lifetimes were determined for 16 synthetic flavylium cation analogues of anthocyanin plant pigments in dry acetonitrile acidified with trifluoroacetic acid (TFA). Phosphorescence was also observed from the lowest excited triplet state all cations at 77 K a rigid TFA-acidified isopropanol glass. The fluorescence quantum yields depend systematic manner on nature position ...

We report the measurements of the production of strange hadrons K S , and at mid rapidity in Au+Au collisions at p s NN = 14.5 GeV from the Beam Energy Scan (BES) program at the BNL Relativistic Heavy Ion Collider (RHIC). The collision energy dependence of strange hadron yields are also presented. To understand the recombination and parton energy loss mechanisms, nuclear modi cation factors and...

In this paper concepts for fault tolerant communication sys tems in large scale manipulators for heavy weights are introduced This class of robots makes high demands on safety and real time behaviour of data transmission which cannot be ful lled by conventional communi cation systems According to di erent types of data the communication system has to cope with two fault tolerant architectures b...

gram (Adriano, 1986; Davies, 1992; Forstner, 1995; Ma and Rao, 1997). Measurement of cation selectivity in soils provides important infor­ mation about the affinity and binding strength of a particular cation In many cases, much of the Pb in uncontaminated on soil surfaces. Gaines-Thomas (KGT) selectivity coefficients were determined for a variety of K/Ca and K/Pb ratios on an Oxisol and Ultiso...

Increasing water demand and reducing its contaminations are the main concerns and challenges for water resource managers and planner due to its limited sources and high value. This study aims to assess and understand the factors which threaten the quality of groundwater resources and to achieve this, samples were taken from 14 active wells in District 3 of the Municipality of Tehran. After cate...