Technological developments such as two dimensional electrophoresis [11, electroblotting of proteins [2], the introduction of the gas phase sequencer [3], and the introduction of polyvinylidenedifluoride (PVDF) membranes mark major advances of the last decade in protein characterization and isolation. The ability to sequence proteins that have been blotted onto PVDF membranes following their sep...

A global increase in invasive infections due to group A Streptococcus (S. pyogenes or GAS) has been observed since the 1980s, associated with emergence of a clonal group of strains of the M1T1 serotype. Among other virulence attributes, the M1T1 clone secretes NAD+-glycohydrolase (NADase). When GAS binds to epithelial cells in vitro, NADase is translocated into the cytosol in a process mediated...

Fatty acids of twelve species of cyanobacteria grown under different photoautotrophic conditions were studied and their composition was compared with literature data of many other species. We have come to the conclusion that the lipids of cyanobacteria do not contain fatty acids with a chain longer than 18 carbon atoms. In our opinion, omission of an analytical procedure, i.e. purification of f...

Chromatography is an analytical technique employed for purification and separation of organic and inorganic substances including characterisation and quantitative measurement of compounds (table). Basically there are two types: l. Gas chromatography (GC), 2. Liquid chromatography (LC). Although discovered in 1906 by Tshett, developed in the 1950s as the GC technique where the mobile phase are g...

The chemical basis for commercial production and purification of nitrous oxide is outlined and discussed. Nitric oxide is the most likely toxic contaminant but the concentration in the effluent gas from a cylinder diminishes rapidly due to fractionation. Nitric oxide reacts with oxygen but the velocity of the reaction is influenced by concentration and is very slow at concentrations below about...

Perfluoroisobutyronitrile (C4F7N), an environment-friendly insulating gas, has excellent properties and the potential to be used in gas-insulated equipment when mixed with CO2. Selecting suitable adsorption materials adsorb decomposition products of C4F7N mixture can ensure safe stable operation personal safety operators electric power industry. The characteristics ZSM-5 molecular sieve on its ...

This study aims to determine the effect of adsorbents marble powder and manure rock laying hens on percentage bio-gas content, optimization adsorbent treatment in producing content reducing amount other than CH4. The research material used was chicken powder. method an experiment with RAL (completely randomized design), which consisted 4 treatments replications. is without using adsorbents; 100...

Waste water purification is shown to be an important field of environmental hygiene for non-ferrous metal industries. Hydrometallurgy becomes of greater importance for metal production and refining. Quality standards for drinking water and rivers require a minimum of some harmful impurities, e.g. metal compounds. The unit operations of hydrometallurgy technologically parallel the methods of eff...

Hydrogen as an energy vector is going to play important role in the global mix. On other hand, wastewater management has become a worldwide concern, urban settlements have been considerably increasing for decades. Consequently, biodigestion produce biogas (rich methane) water treatment plants could be interesting starting point obtain valuable gas that can converted into hydrogen through steam ...

Noble gases dissolved in natural waters are useful tracers for quantifying physical processes. Here, we describe a field-deployable gas equilibration mass spectrometer (GEMS) that provides continuous, real-time measurements of Ne, Ar, Kr, and Xe mole ratios in natural waters. Gas is equilibrated with a membrane contactor cartridge and measured with a quadrupole mass spectrometer, after in-line ...