Magnesium compounds, inhibition

The particuiar magnesium compound seiected for inhibition is dependent upon fuei characteristics. For iow-vanadium concentrations (beiow 50 ppm), an oii-soiubie compound such as magnesium suifonate is added in the correct proportion to the vanadium present. The cost of oii-soiubie inhibitors becomes prohibitive above concentrations of 50 ppm. 

Several workers have observed the inhibition of autoxidative degradation of cellulose or its model compounds in the presence of magnesium compounds (8-14, 18). However, the mechanism for the observed inhibition process has been a matter of some controversy. Some workers have attributed their observation to the stabilization of peroxides by magnesium compounds (8, 9, 11). Robert has suggested that the metallic catalysts are adsorbed on or coprecipitated with magnesium hydroxide (13). Other workers are convinced that the... 

Balajka J, Gas-Side Corrosion in Oil-Fired Boilers. Research Power Institute, Bratislava, CSSR, 1983. Barbooti MM, Corrosion Inhibitors-Magnesium Compounds additives to Heavy Fuel Oil, Proceedings of the 1st International Conference on Chemical and Petrochemical Industries, Beirut, Lebanon, Jan. 1-6, 2001. Barbooti MM, Al-Niaimi S and Al-Sultani KF, Dynamic Studies on the Inhibitive Action Of Magnesium Stearate on Hot Ash Corrosion in a Kerosene Fired Furnace. J Mater Environ Sci, 2012, 3(4) 686-697. Barbooti MM, Nassori HJ and Al-Madfai SHF, Thermochemical Studies on Hot Ash Corrosion of Stainless Steel 304 and Inhibition by Magnesium Sulfate. Thermochim Acta, 1988, 126 43 9. 

Organic compounds normally cause Htde or no corrosion of magnesium. Tanks or other containers of magnesium alloys are used for phenol [108-95-2] methyl bromide [74-96 ] and phenylethyl alcohol [60-12-8]. Most alcohols cause no more than mild attack, but anhydrous methanol attacks magnesium vigorously with the formation of magnesium methoxide [109-88-6]. This attack is inhibited by the addition of 1% ammonium sulfide [12135-76-1] or the presence ofwater. 

ARCAs are incorporated into RNA exclusively in the correct orientation to an extent that is similar to the standard cap (see previously), which makes them potentially useful compounds in terms of increasing translational efficiency when incorporated into RNA. Similarly, they should be effective for inhibiting protein synthesis as free analogs. To test the influence of the ARCAs on protein synthesis in vitro, we use the microccocal nuclease treated rabbit reticulocyte lysate system (RRL system) optimized for cap-dependent translation (Cai et al., 1999). Highly cap-dependent translation is achieved at 100 mM potassium acetate and 1.4 mM magnesium chloride. 

The glycoside/aminoglycoside antibiotics, like the macrolides, exert a bacteriostatic effect due to selective inhibition of bacterial protein synthesis, with the exception of novobiocin (26). The compounds neomycin (27), spectinomycin (28) and streptomycin (29) bind selectively to the smaller bacterial 30S ribosomal subunit, whilst lincomycin (30) binds to the larger 50S ribosomal subunit (cf. macrolides). Apramycin (31) has ribosomal binding properties, but the exact site is uncertain (B-81MI10802). Novobiocin (26) can inhibit nucleic acid synthesis, and also complexes magnesium ion, which is essential for cell wall stability. 

Phosphate buffer (0.6 M) slightly inhibited lipolysis, but the same concentration of borate and barbiturate buffers was without effect. Zinc chloride, potassium cyanide, manganese sulfate, cysteine, and magnesium chloride retarded milk lapse activity to various degrees. All of these compounds were tested at pH 8.5 with tributyrin as substrate during a 30-min incubation period (Peterson et al 1948). 

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