Stained glass coating

The adhesive was developed for application to seal food containers with alumina foils and to seal glass plates. In this case, the vinyl polymerization step can be carried out by UV light radiation through the already mounted glass plates with a photoactive radical initiator to cure the viscous adhesive material. Another application of this material is the development of diffusion barrier containing protective coatings on medieval stained glasses (31). 

Throughout this time the figures in the stained-glass windows remained still. The bird displayed his coat of dazzling feathers with endless invention. Hitherto, the aged Hero had been busy with his own, unseen work, when suddenly the King cried out in joy ... 

Nanoparticles are frequently used as a suspension in some kind of solvent. This is a two phase mixture of suspended solid and liquid solvent and is thus an example of a colloid. The solid doesn t separate out as a precipitate partially because the nanoparticles are so small and partially because they are stabilised by coating groups that prevent their aggregation into a precipitate and enhance their solubility. Colloidal gold, which has a typical red colour for particles of less than 100 nm, has been known since ancient times as a means of staining glass. Colloid science is a mature discipline that is much wider than the relatively recent field of nanoparticle research. Strictly a colloid can be defined as a stable system of small particles dispersed in a different medium. It represents a multi-phase system in which one dimension of a dispersed phase is of colloidal size. Thus, for example, a foam is a gas dispersed in a liquid or solid. A liquid aerosol is a liquid dispersed in gas, whereas a solid aerosol (or smoke) is a solid dispersed in a gas. An emulsion is a liquid dispersed in a liquid, a gel is liquid dispersed in a solid and a soils a solid dispersed in a liquid or solid. We saw in Section 14.7 the distinction between sol and gel in the sol gel process. 

Hostacoll C, a presumably low-molecular-weight condensate resin of ethyl-enimine, crotonic acid and ethylene glycol, was used in the 1950s as a coating and consolidant for stained glass (Jagers et al., 2000). It degrades to water-removable products. 

RC90 Rhone-Poulenc 50%TEOS oligomers + methylphenylsiloxane White spirit + 8% toluene Tin catalyst Fewer cracks in gel, used for coating stained glass... 

The decreasing levels of SO2 and increasing frequency of car traffic has resulted in a new multi-pollutant situation in many urban and industrial areas. In order to possibly quantify the corrosion effects caused by this new multi-pollutant situation an extended exposure program was performed that took place between 1997 and 2001 and involved some 30 test sites in 18 countries in Europe and North America [91]. Specimens of carbon steel, zinc, copper, bronze, limestone, paint-coated steel, and glass representative of medieval stained glass windows were exposed for up to four years. At each site, the environmental data measured included climatic parameters (temperature, relative humidity, and sunshine radiation), gaseous pollutants (SO2, NO2, HNO3, and O3), particles (presented as PMio, i.e., concentration of particles with diameter < 10 pm), and precipitation (total amount, conductivity, and concentration of, i.e., H+, S04 , N03, Cl", NH4+). 

Fig. 20.2 Chronic lithium and valproate robustly increase bcl-2 immunoreactive neurons in the frontal cortex. Male Wistar Kyoto rats were treated with either Li2C03, valproate or saline by twice daily i.p. injections for four weeks. Rats brains were cut at 30 pm serial sections were cut coronally through the anterior portion of the brain, mounted on gelatin-coated glass slides and were stained with thio-nin. The sections of the second and third sets were incubated free-floating for 3 d at 4°C in 0.01 M PBS containing a polyclonal antibody against bcl-2 (N-19, Santa Cruz Biotechnology,...

Formulations (clear liquids or coloured formulations) based on an ethanol solution of various silica or aluminosilica precursors are marketed for application on glass, metallic or plastic surfaces to achieve hard 1 10 pm coatings that form strong chemical bonding with the surfaces and protect against staining or water corrosion. 

Prior to immunohistochemical staining, paraffin sections must be properly mounted onto slides, and then deparaffinized and rehydrated. To help adherence to the glass and decrease the chances of sections dissociating from the slides, paraffin tissue sections should be mounted on tissue-adhesive-coated slides. The use of tissue-adhesive-coated slides is especially important for paraffin tissue sections undergoing heat-induced antigen retrieval (see Sect. 6.1.1). 

After the completion of the in vivo microdialysis experiment, rats are euthanized with an overdose of sodium pentobarbital (100 mg/kg) and perfused intracardially with 0.9% saline followed by 10% formalin. The brains are extracted and stored in a 10% formalin solution until they are sectioned into slices (40-60 mm) consecutively through the guide cannula tract. The sections are mounted onto gelatin-coated glass slides and stained with thionin. An observer unaware of the rat s treatment or results verifies the cannula location for each rat. 

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