Polymer coated glass

Figure 3 Schematic diagram of a solid-phase N02 sensor. The sensor consists of a small cell supporting the polymer-coated, glass substrate behind a glass window in full view of a PMT. The CL reagent is immobilized on the hydrogel substrate. The gel is sandwiched between the glass window and a Teflon PTFE membrane. The purpose of the Teflon membrane is to permit the diffusion of N02 from the airstream into the gel while preventing the loss of water from the hydrogel. Inlet and outlet tubes (PTFE) allow a vacuum pump to sample air (2 L/min) directly across the surface of the chemical sensor. (Adapted with permission from Ref. 12.)...

More recently, Harner et al. (2003) coated ethylene vinyl acetate (EVA) onto glass (polymer coated glass [POG]) for use as fugacity sensors or equilibrium samplers of SVOCs in indoor and outdoor air. The EVA film fhickness was 1.1 and 2.4 qm depending on the application and as expected, SVOC sorption capacity and times to equilibrium were shown to be directly proportional to film thickness. The clearance capacity Ey volume of sample medium cleared of chemical) of a sorbent for an analyte is given by... 

Harner, T. Farrar, N.J. Schoeib, M. Jones, K.C. Gobas, F.A.P.C. 2003, Characterization of polymer-coated glass as a passive air sampler for persistent organic pollutants. Environ. Sci. Technol. 37 2486-2493. 

To be certain that ionic character of the HA surface is operative in its contact with the cell in aqueous media, streaming potential measurements were carried out at pH 6.0 and 7.4. The C, potential for the polymer-coated glass beads (48-60 mesh) was calculated from the measured values of the streaming potential. The results obtained are shown in Table 10. 

It has been observed the formation of continuous liquids on high-energy solid surfaces, such as mica, quartz, and silica, when those surfaces are subjected to immersion and emersion in water [13,14]. A continuous film of water on a hydrophilic (i.e., high energy) plasma polymer-coated glass slide moments after it was immersed to a depth of 3 cm in a beaker of DDI water is shown in Figure 26.21A. The water film remained continuous as it receded to the bottom of the plate. After about 2 min the water film front receded to approximately 1 cm from the bottom of the plate, as shown in Figure 26.21B. The presence and stability of a continuous water film can be detected and quantified by the Wilhelmy method [15]. 

Figure 26.21 Pictures of a continuous film of water on a plasma polymer coated glass slide (A) just after wetting and (B) after 2 min of exposure to air. Arrows indicate the region of the continuous water film.

Polymer coated glass beads Pellidon Nylon 45... 

Columns packed with small polymer-coated glass beads, because of their large surface area to void volume ratio, provide a severe test of platelet-surface compatibility. A 2.5 ml column packed with 0.35 - 0.50 mm diameter beads provides -200 cm of surface area which, at a point in time, is exposed to -0.6 ml of blood. This is equivalent to spreading a film of blood 30 urn thick on a flat surface and, assuming a mean capillary diameter of 7 urn, represents approximately one-twentieth the surface to volume ratio of a capillary bed. 

Figure 6. Correlation of anti-fibrinogen antibody binding with platelet activation by polyalkyl methacrylates. Polymer-coated glass cover slips were exposed first to fibrinogen solution (250 ug/ml) and then to 1 25x-labeled antibody solution (300 ng/ml, 800 cpm/ng). (Reproduced with permission from Ref. 24. Copyright 1986 Grune Stratton.)...

One g of the polymer-coated glass beads were closely packed in a tubing of poly(vinyl chloride) (i.d. - 3 mm) equipped with a stopcock, and the packed column was primed with physiological saline for 24 h to exclude a liquid-air interface and to equilibrate the polymer surface with the physiological environment. 

Keywords Reinforced concrete, polymer coating, glass fibres, durability, ageing. 

PVK is used for polymer-coated glass substrates for deoxyribonucleic acid (DNA) stretching and fixation. Thus, the precise gene location on DNA can be obtained utiUzing fluorescence microscopy and atomic force microscopy (AFM). Partially stretched and aggregated DNA molecules are observed on uncoated glass. This suggests that DNA interacts... 

SERRS spectra of Fe-protoporphyrin IX adsorbed on Ag colloidal nanoparticles immobilized onto a polymer-coated glass slide were obtained at very low concentrations ". The spectra exhibit drastic temporal fluctuations on a time scale of seconds in both line frequency and intensity. This result is consistent with an approach to the single molecule limit. Sequences of spectra were analyzed in terms of an underlying continuum and of Raman peaks superimposed on this continuum. The statistical analysis of the spectrum intensity suggested that the main contribution to the intensity fluctuations arise from the continuum. It was found... 

Fig. 25. Experimental arrangement for filling the fresh blood into polymer-coated glass tubes...

Figure 5.7 A schematic diagram of the online coupling of liquid-liquid extraction with GC. O, 50 ml glass syringe with extraction solvent, flow rate 138 t,lmin S, 50 ml glass syringe with sample, flow rate 1430 xl min PI, phase segmentor E, polymer-coated glass extraction coil (5 m x 0.7 mm id) P2, phase separator with Teflon membrane, 0.2 xm pore size W, waste V, rotary valve with variable loop (load position) C, carrier gas inlet GC, gas chromatography [1 ].

A typical experimental setup used is depicted in Figure 12.13. The liquid crystal used is E7 (from EM Chemical), which has a nematic-isotropic phase transition temperature of 63°C. The material has negligible absorption (<0.01 cm ) at the argon laser wavelength (5145 A line) used. A 100 pm thick planar aligned nematic hquid crystal film is made by sandwiching the E7 between two mbbed polymer-coated glass shdes. The experiment is conducted at room temperature without the use of a temperature cell. 

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