The Chemical Database Service (CDS) is a national service, funded by the Chemistry Programme of the United Kingdom Engineering and Physical Sciences Research Council (EPSRC). It provides access for UK academics to a range of chemistry databases in the areas of crystallography, synthetic organic chemistry, spectroscopy, and physical chemistry. Three post-doctoral chemists are available to assist users with problems, run training courses, and also give advice to the community on accessing other sources of chemical data and software.

A millimeter/submillimeter velocity modulation spectrometer for studies of molecular ions Rev. Sci. Instrum. 76, 043106 (2005); 10.1063/1.1879372 Application of blazed gratings to millimetersubmillimeter wave gyrotronsA design is presented for a mlllimeter/submillimeter direct absorption spectrometer for studies of the pure rotational spectra of metal-bearing free radicals. The spectrometer operates in the frequency range of 65-550 GHz with an instrumental resolution of 200-1000 kHz and an absorption sensitivity of a few ppm. The instrument utilizes phase-locked Gunn oscillators as the tunable, coherent source of radiation from 65-140 GHz. Higher source frequencies are obtained with Schottky diode multipliers. The gas cell and optics path are designed utilizing Gaussian beam optics to achieve maximum interaction between molecules and the mm-wave radiation in the reaction region. Scalar feedhorns and a series of PTFE lenses are used to propagate the source signal. The gas cell is a cylindrical tube 0.5 m in length with a detachable Broida-type oven. The detector for the spectrometer is a helium-cooled InSb hot electron bolometer. Phase-sensitive detection is achieved by FM modulation of the Gunn oscillators and use of a lock-in amplifier. Spectra are recorded by electrical tuning of the Gum-r oscillator, which is done under computer control. The millimeter and sub-mm rotational spectra of several free radicals have been observed for the first time using this instrument, including CaOH, MgOH, CaH, MgF, and BaOH.

Arkansas's telemedicine system has evolved since 2003 from a support mechanism for high-risk pregnancy consultations to an initiative that spans medical specialties, including asthma care, pediatric cardiology, gynecology, and mental health. The system has also expanded care to diverse populations, including incarcerated women and people with HIV/AIDS. This article describes the system's evolution, organization, and diverse activities. It also shows how telemedicine can have a positive impact on a rural state and how such a state can become an engine for change regionally. The Arkansas telemedicine system faced classic challenges to uptake and function, in building and sustaining funding, in obtaining insurance reimbursement for services, and in educating patients and providers. The system's impacts on health outcomes and medical practice culture have also reached beyond patient care and provider support. The existing yet continually evolving telemedicine infrastructure and partnerships in Arkansas will respond to the state's inevitable health care reform adaptations from the Affordable Care Act and could provide direction for other states seeking to adopt or expand their telemedicine efforts.

A comparative study of the hyperfine interactions in the X 2Σ+ state of TiN and the X 3Δ state of TiO has been performed. The 48Ti14N(I=1) hyperfine structure was determined from the analysis of 19 components of the N=1–0 and N=2–1 pure rotational transitions recorded using the pump/probe microwave-optical double resonance technique. The 47Ti(I=5/2) hyperfine structure of X 2Σ+ TiN was determined from an analysis of the high resolution optical spectrum of the (0,0) A 2Π3/2–X 2Σ+ band system. The resulting parameters are (in MHz) B(48Ti14N)=18 589.3513(13), D(48Ti14N)=0.026 31(18), γ(48Ti14N)=−52.2070(13), bF(N)=18.480(3), c(N)=0.166(7), eQq0(N)=−1.514(8), CI(N)=0.0137(12), bF(47Ti) =−558.8(11), c(47Ti)=−15(5), and eQq0(47Ti)=62(16). An analysis of the (0,0) band of the B 3Π–X 3Δ system of 47Ti16O produced the X 3Δ hyperfine parameters (in MHz): a(47Ti) =−54.7(21), (bF+2c/3)(47Ti)=−231.6(60), and eQq0(47Ti)=−49(31). An interpretation based upon the predicted nature of the bonding in TiO and TiN is given.

The permanent electric dipole moments of CaOH and SrOH in their X 2Σ+, A 2Π3/2, A 2Π1/2, and B 2Σ+ states have been measured using the technique of supersonic molecular beam optical Stark spectroscopy. For CaOH the values obtained were μ(X 2Σ+)=1.465(61)D, μ(A 2Π1/2)=0.836(32)D, μ(A 2Π3/2)=0.766(24)D, and μ(B 2Σ+)=0.744(84)D, while for SrOH the values were μ(X 2Σ+)=1.900(14)D, μ(A 2Π1/2)=0.590(45)D, μ(A 2Π3/2)=0.424(5)D, and μ(B 2Σ+)=0.396(61)D. The results are compared with values from a recent ab initio calculation for CaOH and with the predictions of a semiempirical electrostatic polarization model.