The diffuse far-ultraviolet (FUV) background has received considerable attention from astronomers since the 1970's. initial impetus came hope of detecting UV radiation hot intergalactic medium. central importance FUV to physics (heating and ionization) atomic phases motivated next generation experiments. consensus view is that emission at high latitudes three components: stellar reflected by du...

We use ROSAT PSPC data to study the X-ray properties of a sample of twelve poor groups that have extensive membership information (Zabludoff & Mulchaey 1997; Paper I). Diffuse X-ray emission is detected in nine of these groups. In all but one of the X-ray detected groups, the X-ray emission is centered on a luminous elliptical galaxy. Fits to the surface brightness profiles of the X-ray emissio...

In vitro propagation of AZ x M9 new apple rootstock resulted of breeding program of vegetative apple rootstock in Iran was investigated. Nodal explants were inoculated in Murashige and SKoog (MS) medium supplemented with various concentrations of 6-benzylaminon purine (BAP) (0.4, 0.8 and 1.2 mg/l) alone or with naphthalene acetic acid (NAA) (0.1 mg/l). We examined the effect of differe...

The hepatic uptake of imipramine and propranolol was investigated after incubation with isolated rat hepatocytes over a wide concentration range (0.04-400 microM). The cell-to-medium concentration ratio (K(p)) was concentration-dependent and could be described using a two-site binding model incorporating a high affinity/low capacity site and a linear component for a site which was apparently no...

The predominant way of preserving digital images is in their current form. Doing so for the long term, however, will require format migration to avoid the problem of hardware and software obsolescence. An alternative approach is to record digital image information on media with recognized longevity, in a human-readable format. As an investigation of practical archiving in this way, we demonstra...

We determine the frequencies of solar oscillations covering a wide range of degree (100 < l < 4000) and frequency (1.5 < ν < 10 mHz) using the ring diagram technique applied to power spectra obtained from MDI (Michelson Doppler Imager) data. The f-mode ridge extends up to l ≈ 3000, where the line width becomes very large, implying a damping time which is comparable to the time period. The frequ...

This paper presents a novel FPGA-based Gigabit Laser Ethernet Transceiver featuring a custom designed transmission protocol capable of overcoming the inherent impairments of FSO communications. The prototype is characterized and validated with a ground to ground test. OCIS codes: (060.2605) Free-space optical communications; (060.4259) Networks, packet-switched.

The versatility of dye methods for locating cellular enzymes gives them great potentialities as alternatives to metal salt precipitation techniques for electron microscopy, although their use has many attendant difficulties. For example, gross diffusion of the organic dye occurs in embedding media when indigogenic or certain azonaphthol methods are used in attempts to determine the cellular loc...

This work focuses on the development and improvement of numerical tools for the simulation of catalytic monolith reactors. These simulations cover detailed descriptions of reaction mechanisms, transport in gas-phase and washcoats, fluid flow in single channels, and the entire reactor. In DETCHEM, the concept of building a transient model of the monolith reactor by the calculation of steady-stat...

PURPOSE This study assessed the effectiveness of three antimicrobial mouthrinses in reducing microbial growth on photostimulable phosphor (PSP) plates. MATERIALS AND METHODS Prior to performing a full-mouth radiographic survey (FMX), subjects were asked to rinse with one of the three test rinses (Listerine®, Decapinol®, or chlorhexidine oral rinse 0.12%) or to refrain from rinsing. Four PSP p...