ABSTRACT We model cataclysmic variables (CVs) with solar metallicity donors (X = 0.7 and Z 0.02) that evolve to form AM CVn stars through the evolved CV formation channel using various angular momentum loss mechanisms by magnetic braking (AMLMB). find time-scale for AMLMB in our double-dynamo (DD) is shorter than of previously used empirical formulae. Owing time-scales, a larger parameter space...

AM Canum Venaticorum (AM CVn) stars belong to a class of ultra-compact, short period binaries with spectra dominated largely by helium. SDSS J0926+3624 is of particular interest as it is the first observed eclipsing AM CVn system. We observed SDSS J0926+3624 with the Array Camera for Optical to Near-IR Spectrophotometry (ARCONS) at the Palomar 200” telescope. ARCONS uses a relatively new type o...

The cyanobacterial lectin Cyanovirin-N (CV-N) exhibits antiviral activity against HIV at a low nanomolar concentration by interacting with high-mannose oligosaccharides on the virus surface envelope glycoprotein gp120. Atomic structures of wild-type CV-N revealed a monomer in solution and a domain-swapped dimer in the crystal, with the monomer comprising two independent carbohydrate binding sit...

We report on the results from a five-night campaign of high-speed spectroscopy of the 17-minute binary AM Canum Venaticorum, obtained with the 4.2-m William Herschel Telescope on La Palma. We detect a kinematic feature that appears to be entirely analogous to the ‘central spike’ known from the long-period, emission-line AM CVn stars GP Com, V396 Hya and SDSS J124058.03−015919.2, which has been ...

A single subcutaneous injection of 0.1 or 0.3 mg. of 3-methylcholanthrene in olive oil was administered to newborn germ-free mice and to mice derived from the germfree colony but reared under conventional conditions (CVN mice). The germ-free mice have no demonstrable infection with bacteria or fungi and no demonstrable antibodies to certain viruses commonly found in laboratory mice. There was l...

Doppler images of the cool spot distribution on the RS CVn-type star HD 106225 are presented. These images, for Epoch 1995.14, were derived using four photospheric lines. The spot distribution is characterized by a large (radius = 20◦) spot at latitude 45◦ and a weak polar spot with an appendage. The polar spot is considerably smaller than similar features found on other RS CVn stars. The rotat...