Stabilizers, glass

Chemical Reactivity - Reactivity with Water Reacts to form flammable hydrogen gas Reactivity with Common Materials Reacts with acids to form toxic, flammable diborane gas. Slowly attacks and destroys glass Stability During Transport Stable unless contaminated with acids or is overheated, thereby forming flammable hydrogen gas Neutralizing Agents for Acids and Caustics Caustic formed by the reaction with water can be diluted with water and then neutralized with acetic acid Polymerization Not pertinent Inhibitor of Polymerization Not pertinent. 

The glass stability of the Pd-Ni-P system is wider than that of the Pd-Cu-P system. For most bulk Pd-Ni-P glasses (10-mm diameter), AT> 90 K. The AT values of bulk amorphous Pd-Cu-P alloys are considerably smaller, ranging from 27 to 73 K. 

Encapsulated HRP on sol-gel glasses stability during storage (33% of its residual activity after 60 days) The encapsulated HRP showed enhanced [53]... 

Buitink, Hemminga, M. A., and Hoekstra, E A. Is there a role for oligosaccharides in seed longevity An assessment of intracellular glass stability. Plant Physiol, 122, 1217, 2000. 

At high viscosity of dispersion medium the resistance of gap to thinning may be the reason for very high, or even infinite (such as in glasses) stability of... 

DETERMINATION OF GLASS FORMING ABILITY AND GLASS STABILITY... 

Typical thermal spectra (see Figures 2.3 and 2.4) may contain one or more exothermic peaks due to crystallization of different phases, but only the lowest temperature peak is considered in discussing glass stability. Once a significant number of crystals are formed, subsequent events at higher temperatures are not considered important in glass stability discussions. 

One complication in all gas phase eliminations is xmcertainty that the reaction actually occurs in the gas phase and not on the surface of the reaction vessel, because some pyrolyses appear to result from surface-mediated reactions. For example, dissociation of an ester at the glass surface could produce a glass-stabilized carbocation that then loses a /3-proton in the rate-limiting step of the reaction. Therefore, investigators sometimes add glass beads to a reaction vessel to see if product distributions are altered by the increase in surface area. ... 

The alterations of external (temperature and/ or humidity) and internal factors (glass stability) influence the respiration of dry seeds (Walters et al., 2001) and their energy status, which could be calculated by use of the sorption isotherm, as suggested by Vertucci Leopwld (1984) ... 

Weinberg MC (1994) Glass-forming ability and glass stability in simple systems. J Non-Cryst Solids 167(l-2) 81-88... 

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