Ca2+-ATPase activity has been characterized in Streptomyces griseus. The enzyme has a pH optimum of 8.5 at 37 degrees C. Its Ca2+ requirement can be substituted by Cd2+, Zn2+ and Mn2+. Mg2+ inhibits the enzyme non-competitively.

An efficient sensor for Zn(2+) and Cu(2+) was designed based on different binding modes. The sensor displays ratiometric signals for Zn(2+), due to the Zn(2+)-triggered amide tautomerization; while dual-mode selective behaviors for Cu(2+) result from the deprotonation of the amide tautomer.

background: enhancing nursing students’ critical thinking is a challenge faced by nurse educators. this study aimed at determiningthe effect of clinical concept mapping on discipline-based critical thinking of nursing students. materials and methods: in this quasi-experimental post-test only design, a convenient sample of 4th year nursing students (n = 32)participated. they were randomly divide...

in the present study, the interactions of three different lithium species li+, li3+ and ch3li with several different sites of the most stable tautomers of dna nucleo-bases are presented. this investigation is based on the results of thermochemical properties, quantum theory of atoms in molecules (qtaim) and natural bond orbital (nbo) analysis, obtained at b3lyp/6-311++g(d,p) level of theory. th...

Sulfate scale deposition (BaSO4, CaSO4, and SrSO4) is a common problem in oilfield operations around the world, which causes significant formation damage during production and injection activities. This paper presents the results of an experimental study on the permeability reduction of porous media due to sulfate scale deposition. A set of experiments were cond...

Two Co(II) and Mn(II) coordination polymers, which have been synthesized under hydrothermal conditions, are isomorphous with magnetic Δ-chains containing trinuclear triangular [M(3)(μ(3)-OH)] clusters. The Δ-chains are bridged by isonicotinic spacers to generate a two-dimensional scalariform layer structure. Magnetic investigations indicate that Co(II) compound exhibits not only spin canting bu...