Storage and durability

In numerous patents the synthesis of suitable furo-, thieno-, and pyrrolo-tropylium salts is described, for example, that of squarylium dyes like 623 and 624 (Scheme 169 85JAP60/262163 86JAP61/185487 88JAP63/41858, 88JAP63/102990). These substances serve as components of photoconduc-tive thin layers for electrophotographic photoreceptors. The materials are claimed to exhibit increased sensitivity, stability on storage, and durability to laser-beam reading. 

Sec. 820.120 Device labelling - Ensure legibility and durability of labels, inspect labels before release from storage, and take measures to prevent mix-up... 

Takahashi, N., Suda, K.A., Hashisuka, I. et al. (2007) Sulfur durability of NO, storage and reduction catalyst with supports of Ti02, Zr02 and Zr02-Ti02 mixed oxides, Appl. Catal. B 72, 187. 

For application of these fluorochemical finishes to textile fabrics, an extremely important factor is their formulation into suitable aqueous emulsions or dispersions. The quality of the formulation has a critical influence on stability during storage and application, as well as the efficacy of treatment and durability [501,502]. In particular, the choice of surfactant(s) for emulsifying or dispersing must ensure good stability with freedom from deposition on rollers, yet must not impair the water and oil repellency of the finished fabric. No individual product fulfils all requirements hence specifically formulated products are available for certain fibre types. 

The development of semiconductor diode lasers with wavelengths shorter than those used for CD-based systems means that there is a need for dyes which can exploit these wavelengths (635-650 nm) to obtain higher-density data storage, as in DVD media. Azo metal-chelate dyes can have absorption maxima in the appropriate region, and, coupled with their excellent light resistance and durability, are possible candidates for use in this respect. However, their recording and readability characteristics need to be improved. 

Defining hydrogen fuel quality specifications is a high priority for the Roadmap. Such specifications must be quantified at the vehicle-station interface and must consider how the presence of small amounts of contaminants affects the performance and durability of fuel cell and balance of plant material compatibility of onboard and stationary hydrogen storage systems and the operation and maintenance of hydrogen production, purification, and delivery systems. Most importantly, fuel quality specification must consider... 

The main risk lies in the potential failure of permanent underground storage of C02. This requires that special attention be paid to demonstrate the economic and technical feasibility of such processes and the availability of sites to sequester all C02 produced (see also Chapter 6). The CCS technologies currently under development could extend the time available to develop a full and durable solution for a sustainable power and fuel provision based on renewable sources. 

The properties of a fuel define its physical and chemical characteristics. A thorough understanding of the properties of a fuel is essential to the design and engineering of engine combustion systems, vehicle fuel systems, fuel storage, and fuel dispensing systems. Fuel properties impact vehicle performance, emissions, fuel efficiency, reliability, and durability. 

The polymer carrier should remain stable and durable during coating, crimping, sterilization, packaging, shelf-storage, and implantation, Physical stability of the polymer is necessary to... 

Hydrogen production, onboard storage and distribution technologies are reviewed in Chap. 2, while basic concepts of electrochemistry are recalled in Chap. 3, with an assessment of the state of development of fuel cells for automotive applications, in terms of performance and durability. 

Polyurethane liner pads employed in naval missile launch systems are exposed to high humidities during storage and occasionally to sea water after their installation. In order to determine their durability towards water, a detailed study was made of their hydrolytic stability. Even though both polyether and polyester based urethanes can give the physical properties required for this application, only the polyether urethanes were studied since they display much superior resistance to hydrolysis (1, 2, 3, ). 

---