S-band metals such as alkali and alkaline earth metals do not undergo a superconducting transition (SCT) at ambient pressure, but their high-pressure phases do. By contrast, room-temperature stable electride [Ca(24)Al(28)O(64)](4+)⋅4e(-) (C12A7:e(-)) in which anionic electrons in the crystallographic sub-nanometer-size cages have high s-character exhibits SCT at 0.2-0.4 K at ambient pressure. I...

the acute toxicity of salts of alkali and alkaline earth metals, such as sodium (na), potassium (k), calcium (ca) and magnesium (mg) were studied on the egg and larval stages of indian major carp labeo rohita (hamilton). the acute toxicity experiments were conducted followed by the range finding bioassay tests. the experiments were conducted in triplicates. the cumulative percentage of dead or ...

Figure 1: Periodic table in 1D. numbers of electrons have significant dipole moments and are thus reactive species [1]. Alternatively, atoms with even numbers of electrons are inert and do not have any dipole moment due to their symmetry. Based on these results, we have built the 1D version of the Mendeleev’s periodic table which only consists of two groups: alkali metals and noble gases, as sh...

An enzymatic regioselective approach for the glucosylation of a series of 2'-deoxynucleosides was described by using the crude β-glycosidase from bovine liver that is less expensive and can be simply prepared in a standard organic laboratory. With the glucosylation of 2'-deoxyuridine as a model reaction, the effects of several key factors on the enzymatic reaction were examined. The optimum enz...

J. S. Dolado, V. M. Silkin, M. A. Cazalilla, A. Rubio, and P. M. Echenique Materialen Fisika Saila, Kimika Fakultatea, Euskal Herriko Unibertsitatea, 1072 Posta kutxatila, 20080 Donostia, Basque Country, Spain and Centro Mixto CSIC-UPV/EHU, Donostia, Basque Country, Spain Donostia International Physics Center (DIPC) Department of Physics, Brown University, Providence, Rhode Island 02912-1843 La...

Homo- and heteronuclear alkali quartet trimers of type K(3-n)Rb(n) (n = 0,1,2,3) formed on helium nanodroplets are probed by one-color femtosecond (fs) photoionization (PI) spectroscopy. The obtained frequencies are assigned to vibrations in different electronic states in comparison to high level ab initio calculations of the involved potentials including pronounced Jahn-Teller and spin-orbit c...

Grand canonical simulations are used to calculate adsorption isotherms of various classical gases on alkali metal and Mg surfaces. Ab initio adsorption potentials and Lennard-Jones gas-gas interactions are used. Depending on the system, the resulting behavior can be nonwetting for all temperatures studied, complete wetting, or (in the intermediate case) exhibit a wetting transition. An unusual ...

Optically pumped alkali metal atoms currently provide a sensitive solution for magnetic microscopic measurements. As the most practicable plan, Faraday rotation of linearly polarized light is extensively used in spin polarization measurements of alkali metal atoms. In some cases, near-resonant Faraday rotation is applied to improve the sensitivity. However, the near-resonant linearly polarized ...

Molecular-orbital theory for the stopping power of atoms in the low velocity regime: the case of helium in alkali metals. Abstract A free-parameter linear-combination-of-atomic-orbitals approach is presented for analyzing the stopping power of slow ions moving in a metal. The method is applied to the case of He moving in alkali metals. Mean stopping powers for He present a good agreement with l...