Links [1] http://www.sba.unipi.it/it/sba/organizzazione/segreteria-amministrativa [2] http://www.sba.unipi.it/it/sba/personale/tacchi-franca [3] mailto:franca&# 46;tacchi@sba.un&#105 ;pi.it [4] http://www.sba.unipi.it/it/sba/personale/bertela-pier-carla [...

Links [1] http://www.sba.unipi.it/it/sba/organizzazione/segreteria-amministrativa [2] http://www.sba.unipi.it/it/sba/personale/tacchi-franca [3] mailto:franca&# 46;tacchi@sba.un&#105 ;pi.it [4] http://www.sba.unipi.it/it/sba/personale/bertela-pier-carla [...

Asymbiotic and associative diazotropic bacteria such as Azotobacter and Azosprillum, respectively are widely distributed in different rhizospheric and nonrhizospheric soils and help in growth and development of plants. Sixty two soil samples were collected from different crop rotations namely Rice-Wheat, Vegetables, Agro forestry and Grassland from the districts Chandauli, Jaunpur,Ballia, Ghazi...

Microquasars are galactic black hole binary systems with radio jets which can sometimes be spatially resolved to show superluminal motion. The first and best known of this class of objects is GRS 1915+105, the brightest accreting source in our Galaxy. There is persistent speculation that strong jet emission could be linked to black hole spin. If so, the high spin should also be evident in accre...

It is now ten years since the first microquasar GRS 1915+105 was discovered. More than six years of observations with RossiXTE have shown a level of variability never observed in any other X-ray source. Here I try to address some issues, based on X-ray observations only, that have relevance for theoretical modeling. First, I ignore these peculiarities and concentrate on the similarities with ot...

The structure of the title compound, C(6)H(6)O(3), has been redetermined at low temperature [room-temperature structure: Maartmann-Moe (1965 ▶). Acta Cryst. 19, 155-157]. The mol-ecule is planar with approximate D(3h) point symmetry, yet it crystallizes in the chiral ortho-rhom-bic space group P2(1)2(1)2(1) with a three-dimensional hydrogen-bonding network containing infinite O-H⋯O-H⋯O-H chains.

Thrombin-related peptide 508 (TP508) accelerates bone regeneration during distraction osteogenesis. Here we examined the effect of TP508 on bone regeneration during distraction osteogenesis by immunolocalization of RUNX2 protein, a marker of osteoblast differentiation, osteopontin (OPN) and bone sialoprotein (BSP), two late markers of the osteoblast lineage. Distraction was performed in tibiae ...

1. Spectral analysis of simultaneous ROSAT/BATSE data After the discovery of GRS 1915+105 (Castro-Tirado et al. 1992) we obtained pointed ROSAT observations every six months (12 until now). The flux in the ROSAT (0.1–2.4 keV) band is strikingly different from the simultaneous BATSE (25–50 keV) flux which was obtained by integrating the best fit power law (Fig. 1). Motivated by the different int...

We report on extensive X-ray observations of the galactic superlu-minal motion source GRS 1915+105 with the RXTE satellite over the last year. More than 130 RXTE pointings have been performed on roughly a weekly basis. GRS 1915+105 displays drastic X-ray intensity variations on a variety of time scales ranging from sub-seconds to days. In general, the intensity changes are accompanied by spectr...