Volume glasses

Kukreja, V.P. Bove, J.L. "Determination of free carbon collected on high volume glass fiber filter". Environ. Sci. Technol., 1976, W, 187-189. 

The completed emulsion is then filled into large-volume glass containers and sealed with oil-resistant composition stoppers. These containers are then autoclaved, in some cases using shaking or rotating autoclaves to minimize any thermal damage to the product as a whole. 

A suggested step-by-step sequence in the microbial validation of a dry-heat process for sterilizing and depyrogenating large-volume glass containers by a convection batch oven is presented. Procedures for the validation of a tunnel sterilization process have been reported by Wegel [25] and Akers et al. [26],... 

Glass-bead-packed one-dimensional column experiments were performed with vertically oriented 2.5 cm I.D., 15.0 cm long, 74.0 ml. total volume glass columns. The glass bead diameter ranged from 0.23 to 0.36 mm, and... 

Bamford, D., Dlubek, G., Reiche, A., Alam, M.A., Meyer, W., Galvosas, P., Rittig, F. (2001) The local free volume, glass transition, and ionic con-ductivity in a polymer electrolyte a positron lifetime study . J. Chem. Phys. 115, 7260. 

Prepare reagent B by dissolving Ig CUSO4 5H2O in 100 ml (final volume) glass-distilled water. 

The method used for application of sample solutions is determined by whether HPTLC, TLC, or preparative layer chromatography (PLC) and qualitative or quantitative analysis are being performed. Sample volumes of 0.5-5 pi for TLC and 0.1-1 pi for HPTLC are applied manually to the layer origin as spots using fixed volume glass micropipets, such as Drummond Microcaps or selectable volume 10 or 25 pi digital microdispensers. In addition, many manual and automated instruments are available for sample application, especially for quantitative HPTLC. 

The reagent is prepared by passing fluorine gas into a 2% solution of sodium hydroxide. The effluent gas is a mixture of about equal parts of OFj and Oj. Merritt and Ruff trapped OFg out of the fluorine stream at liquid oxygen temperature, distilled off oxygen and fluorine, and so obtained material about 99% pure, which was stored at room temperature in large-volume glass bulbs. They found that oxygen difluoride oxidizes primary aliphatic amines smoothly at —78° in Freon 11 as solvent to the nitroso derivatives ... 

Reactions performed under atmospheric conditions at the boiling point of the reaction mixture are the mainstay of traditional synthetic methods. Traditional reflux is easily adapted to a wide range of reaction volumes, glass components are easy to configure, and reaction homogeneity is achieved by constant of the boiling solution or by stirring. 

Dlubek, G., Bamford, D., Rodriguez-Gonzalez, A., Bornemann, S., Stejny, J., Schade, B., Alam, M. A., and Arnold, M., Free volume, glass transition and degree of branching in metallocene-based propylene/a-olefin copolymers positron lifetime, density and DSC studies, J. Polym. Sci. B, 40, 434-453 (2002b). 

By comparing the sorption and transport behavior of small molecules in an as-cast, disordered, isotropic sample with those of an annealed, ordered, frozen liquid crystalline sample, the effect of axial ordering on sorption and transport properties may be determined unambiguously. Moreover, the influence of axial ordering on other properties (e.g. density, fractional free volume, glass transition temperature, and free volume accessible to orthoPositronium) may be determined. 

Glass bead/epoxy composites at 25° C (composition range 0-30% by volume glass)... 

High-volume cascade impactors This technique consists of a stack of five 30 cm-diameter plates, each with 300 jet orifices, mounted over a standard high-volume glass fiber filter. The collection medium is perforated sheets of aluminum foil or glass fiber mounted on aluminum plates. Particle size fractions greater than 7 pm and less than 1.1 pm are collected at a flow rate of 0.561 min... 

Among chemistry-related applications, the study of polymers is undoubtedly the most frequent. Free volume, glass transition, swelling, radiation damage, and aging are just a few examples of phenomena studied by positrons in polymers. However, radiation effects on Ps formation at low temperature bave attracted notable attention in the last few years (e.g., Hirade et al. 2000 Suzuki et al. 2000). 

Table 2. Structures of the Methacrylates Used, Molar Volumes, Glass Temperatures (own DSC, Measurements) as well as Final Conversions... 

Isoharic (constant pressure) and isochoric (constant volume) glass transitions in polymers were first observed for bisphenol A polycarbonate (62). A molecular dynamics study of such transitions in a model amorphous polymer has also been reported (63). This study shows that the glass transition is primarily associated with the freezing of the torsional degrees of freedom of polymer chains (related to chain stiffness), which are strongly coupled to the degree of freedom associated with the nonbonded Lennard-Jones potential (related to interchain cohesive forces). 

Sutherland L S, Soares C G (2005) Impact on low fibre-volume, glass/polyester rectangular plates . Comp Struct, 68(1), 13-22. 

The load transfer mechanics at the fiber-matrix interface have been extensively investigated and reported on. Their significance in composite structural integrity can be understood when 1 in. of 50% volume glass fiber composite with a fiber diameter of 0.0003 in. contains approximately 6500 in. of interface area. ... 

T Aa is seen to be a function of V only, and since, according to quite well established observations of Simha and Boyer this product is a constant for all polymers (10), eqn. (1) implies an iso-free volume glass transition state. In fact, using the empirical Simha-Boyer constant of 0.113 for T Aa, it is found that V = 0.025 at T, identical with the free volume estimated from tne WLF equation (11). The hole formation energy, E, in the Gibbs-DiMarzio treatment is a function of T alone and is directly proportional to the latter, as is seen in eqn. (2). 

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