The proteins of 30S RNP particles containing pre-mRNA (hnRNA) were cross-linked with bifunctional reagents (dimethyl-suberimidate and dimethyl-3,3'-dithiobispropionimidate). Further treatment with 1 or 2 M NaCl dissociates all RNA from protein. However, a significant part of protein particles--informofers being cross-linked survived high salt treatment. Their sedimentation coefficients were clo...

We simulate the collapse of a turbulent gas cloud with particle-based code Gadget2. choose two sub-clouds, formed by those particles located around centers $\vec{r}_L$ and $\vec{r}_R$ within radii $r_L$ $r_R$, respectively. A translational velocity $\vec{v}_L$ or $\vec{v}_R$ is added, so that sub-clouds move towards each other to collide. The radius pre-collision are chosen be un-equal, both he...

The beta 2 integrins (LFA-1, Mac-1, and p150,95) are critical for many adhesive functions of leukocytes. Although the binding of the IgG-opsonized particles occurs normally in the absence of beta 2 integrins, phagocytosis of IgG-opsonized particles by activated neutrophils (PMN) requires these integrins. This observation suggests a role for beta 2 integrins in phagocytosis subsequent to particl...

The experiment of Fe-Beta catalysts modified by Ce with incipient wetness impregnation methods was carried out for the selective catalytic reduction NOx NH3. characteristics catalyst before and after hydrothermal treatment were evaluated changes active sites, acid sites pore structure. results showed that conversion from [Fe2+-OX]+ to [HO-Fe3+-OX]+ during reaction aging promoted gradual dehydro...

In the setting of generic $\beta$-ensembles, we use loop equation hierarchy to prove a local law with optimal error up constant, valid on any scale including microscopic. This has following consequences. (i) The rigidity ordered particles is order $(\log N)/N$ in bulk spectrum. (ii) Fluctuations satisfy central limit theorem covariance corresponding logarithmically correlated field; particular ...

This paper describes two Si micromachined structures for sensing beta-particles. The basic device (the micro-detector) includes a square silicon cathode surrounded by a concentric anode, and is formed by stacks of glass and Si wafers. Incident beta-particles ionize the gas encapsulated between the electrodes, resulting in an avalanche current pulse or ‘count’. It is shown experimentally that de...

The fine structure of ascitic cells, consisting of 87-92% heterophil, 5-10% eosinophil leukocytes, and 3% macrophages, is well preserved by glutaraldehyde-osmium tetroxide fixation only when the osmolality of the fixative is appropriately balanced. The beta-glycogen particles, 35-45 mmicro in diameter, are found either as large accumulations in the perinuclear region or in a dispersed form in p...

In an investigation of the role of glucanases in modifying yeast cell walls at the location of new buds, vesicles derived from the endoplasmic reticulum, which are secreted locally into the cell wall of growing buds and may be involved in the secretion of glucanases, have been isolated.In yeast, exo-beta-1,3-glucanase (EC 3.2.1.6) is present both extra- and intracellularly. Exponentially growin...

atl is a newly discovered autolysin gene in Staphylococcus aureus. The gene product, ATL, is a unique, bifunctional protein that has an amidase domain and a glucosaminidase domain. It undergoes proteolytic processing to generate two extracellular peptidoglycan hydrolases, a 59-kDa endo-beta-N-acetylglucosaminidase and a 62-kDa N-acetylmuramyl-L-alanine amidase. It has been suggested that these ...