We have previously reported the presence of a high molecular weight polypeptide growth factor in the plasma of normal human or rat serum which stimulates DNA synthesis in primary cultures of normal rat hepatocytes. We referred to this activity as hepatopoietin A (HPTA) (Michalopoulos, G., Houck, K. A., Dolan, M. L., and Luetteke, N. C. Control of hepatocytes replication by two serum factors. Ca...

The SIRTF InfraRed Spectrograph (IRS) is faced with many of the same calibration challenges that were experienced in the ISO SWS calibration program, owing to similar wavelength coverage and overlapping spectral resolutions of the two instruments. Although the IRS is up to ∼300 times more sensitive and without moving parts, imposing unique calibration challenges on their own, an overlap in phot...

We present the thermal infrared (5–35 lm) spectrum of 956 Elisa as measured by the Spitzer Infrared Spectrograph (‘‘IRS’’; Houck, J.R. et al. [2004]. Astrophys. J. Suppl. 154, 18–24) together with new groundbased lightcurve data and near-IR spectra. From the visible lightcurve photometry, we determine a rotation period of 16.494 ± 0.001 h, identify the rotational phase of the Spitzer observatio...

the solubility of co2 in the primary, secondary, tertiary and sterically hindered amine aqueous solutions at various conditions was studied. in the present work, the modified kent-eisenberg (m-ke), the extended debye-hückel (e-dh) and the pitzer models were employed to study the solubility of co2 in amine aqueous solutions. two explicit equations are presented to evaluate the concentration of h...

MUCH experimental work and a few clinical studies have been devoted to the anti-ulcer properties of sulphated polysaccharides (Babkin and Komarov, 1932; Schiffrin and Warren, 1942; Wolf and Wolff, 1943; Watt, 1959). Ebimar (Evans Medical Ltd.) is such a substance derived from seaweed (Chondrus Crispus or Gigartina Stellata). Ebimar is based on carrageenan, a sulphated polygalactose. It is produ...

A multi–wavelength study of the IRAS Deep Survey galaxy sample II. The far-IR properties. ABSTRACT Context. The luminosity function (LF) is a basic tool in the study of galaxy evolution since it constrains galaxy formation models. The earliest LF estimates in the IR and far-IR spectral ranges seem to suggest strong evolution. Deeper samples are needed to confirm these predictions. We have a use...