The spectrum of doubly ionized tungsten (W III) was produced in a sliding-spark discharge and recorded photographically on the NIST 10.7-m normal-incidence vacuum spectrograph in the 600-2680 Å spectral region. The analysis has led to the establishment of 71 levels of the interacting 5d4, 5d3 6s and 5d2 6s2 even configurations and 164 levels of the interacting 5d3 6p and 5d2 6s 6p odd ones. A t...

Benzothiazole-triazole derivatives 6a-6s have been synthesized and characterized by ¹HNMR and 13C-NMR. All synthetic compounds were screened for their in vitro α-glucosidase inhibitory activity by using Baker's yeast α-glucosidase enzyme. The majority of compounds exhibited a varying degree of α-glucosidase inhibitory activity with IC50 values between 20.7 and 61.1 μM when compared with standar...

Small lanthanide clusters have interesting magnetic properties, but their structures are unknown. We have identified the structures of small terbium cluster cations Tb(n)(+) (n = 5-9) in the gas phase by analysis of their vibrational spectra. The spectra have been measured via IR multiple photon dissociation of their complexes with Ar atoms in the 50-250 cm(-1) range with an infrared free elect...

We have observed the Stark-induced 6s 1S0 ! 5d6s 3D1 transition in Yb and measured properties relevant to the study of atomic parity nonconservation in this transition. An atomic beam of Yb is excited by 408 nm light in the presence of an external DC electric eld, resulting in cascade uorescence at 556 nm as the excitation decays through the 6s6p 3P1 state. The density of the atomic beam and th...

The solvation of Ba(+) ions created by the photoionization of barium atoms located on the surface of helium nanodroplets has been investigated. The excitation spectra corresponding to the 6p (2)P(1/2) ← 6s (2)S(1/2) and 6p (2)P(3/2) ← 6s (2)S(1/2) transitions of Ba(+) are found to be identical to those recorded in bulk He II [H. J. Reyher, H. Bauer, C. Huber, R. Mayer, A. Schafer, and A. Winnac...

2014 This paper reports the four-photon ionization of caesium atoms when the laser frequency is tuned through the resonant three-photon transition 6S ~ 6F. This experiment was performed by using a tunable-wavelength bandwidth-limited subnanosecond laser pulse at 1.06 03BCm, in the 108-109 W.cm-2 laser intensity range. Pulse widths of 1.5 ns, 50 ps, and 15 ps were used. The resonant character of...

From leaves of Turpenia ternata (Staphylaceae), one megastigmane and seven of its glucosides (1-8) were isolated. Megastigmane and two of the glucosides were found to be known compounds, namely, 3S,5R,6R,9S-tetrahydroxymegastigmane (1), corchoionoside C (2), and icariside B4 (3). The structures of compounds 4-8 (turpinionosides A-E, respectively) were elucidated by means of spectroscopic analys...

We analyze the effect of the host crystal symmetry on the optical spectra of the 6P(1/2)-6S(1/2) and 6P(3/2)-6S(1/2) transitions of atomic Cs in solid (4)He matrices. In particular, we address the deformation of the bubble structures formed by Cs in such quantum crystals. We show that the anisotropy of the stiffness tensor leads to static quadrupolar bubble shape deformations in hexagonally clo...

At least three nuclease activities are associated with purified frog virus 3. These activities are endodeoxyribonuclease (pH 7.5, double-stranded [DS] and single-stranded [SS] deoxyribonucleic acid [DNA]); endodeoxyribonuclease (pH 5.0, DS and SS DNA); endoribonuclease (DS and SS ribonucleic acid [RNA], pH 7.5). These activities are not adsorbed to the surface of the virion but are within the v...

6S is a collaborative peer network application, aimed to extend the current model of centralized search engines with large numbers of autonomous, distributed, micro-search engines. Each peer within the 6S network crawls the Web in a focused way, guided by its user’s information context. This way better contextual coverage can be achieved. Each peer also acts within the network by submitting, fo...