By optical injection of an 852-nm extended-cavity diode laser (master laser) to lock the + 1-order sideband of a ~9-GHz-current-modulated diode laser (slave laser), we generate a pair of phase-locked lasers with a frequency difference up to ~9-GHz for a cesium (Cs) magneto-optical trap (MOT) with convenient tuning capability. For a cesium MOT, the master laser acts as repumping laser, locked to...

The narrow optical frequency resonances of the 6s 2S1/2 → 5d 2D3/2 and 6s 2S1/2 → 5d 2D5/2 forbidden transitions in Ba have been proposed as suitable frequencies for a new optical frequency standard. The major sources of errors in measurements of singly ionized systems are due to the quadratic Zeeman and electric quadrupole shifts. We report here the most accurate calculations to date for the h...

Frequency shifts of the (199)Hg(+) 5d (10)6s (2)S1/2 (F = 0, MF = 0) to 5d (9)6s (2 2)D5/2 (F = 2, MF = 0) electric-quadrupole transition at 282 nm due to external fields are calculated, based on a combination of measured atomic parameters and ab initio calculations. This transition is under investigation as an optical frequency standard. The perturbations calculated are the quadratic Zeeman sh...

0301-0104/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.chemphys.2009.03.022 * Corresponding author. Address: Department of C Queens College – CUNY, Flushing, NY 11367, United S fax: +1 718 997 5531. E-mail address: [email protected] (C.M. E Vacuum ultraviolet photoabsorption spectra of CH3I 6s and 6s0 Rydberg states doped into supercritical argon, krypton, and xenon perturbers ...

Small RNAs (sRNAs) are molecules essential for a number of regulatory processes in the bacterial cell. Here we characterize Ms1, a sRNA that is highly expressed in Mycobacterium smegmatis during stationary phase of growth. By glycerol gradient ultracentrifugation, RNA binding assay, and RNA co-immunoprecipitation, we show that Ms1 interacts with the RNA polymerase (RNAP) core that is free of th...

Inappropriate thrombus formation within blood vessels is the leading cause of mortality in the industrialized world. Factor Xa (FXa) is a trypsin-like serine protease that plays a key role in the blood coagulation cascade and represents an attractive target for anticoagulant drug development. From a high-throughput in vitro mass screen of our chemical library, we identified 4-[5-[(2R,6S)-2, 6-d...

We report a two-color magneto-optical trap (MOT) for ytterbium atoms operating at a low magnetic field gradient down to 2 G/cm where a conventional MOT using the singlet transition (6s 1S0 → 6s6p 1P1) is unable to trap atoms. By simultaneously applying laser light on both the broad-linewidth singlet transition and the narrow-linewidth triplet transition (6s 1S0 → 6s6p 3P1), we load and trap 4.0...

The typical photodetectors can only detect one specific optical spectral band, such as InGaAs and graphene-PbS quantum dots for near-infrared (NIR) light detection, CdS and Si for visible light detection, and ZnO and III-nitrides for UV light detection. So far, none of the developed photodetector can achieve the multicolor detection with arbitrary spectral selectivity, high sensitivity, high sp...

We present experimental atomic lifetimes for 12 levels in Sb I. The levels belong to the 5p2(3P )6s 2P , 4P , and 5p2(3P )5d 4P , 4F , and 2F terms. The lifetimes were measured using time-resolved laser-induced fluorescence. In addition, we report calculations of transition probabilities in Sb I using a multiconfigurational Dirac-Hartree-Fock method. The physical model was tested through compar...

Different fungal strains were screened for their ability to convert linalool into valuable flavour compounds. Aspergillus niger DSM 821, Botrytis cinerea 5901/02 and Botrytis cinerea 02/FBII/2.1 produced isomers of lilac aldehyde and lilac alcohol via 8hydroxylinalool as postulated intermediate. Linalool oxides and 8-hydroxylinalool accumulated as major products during fungal linalool biotransf...