Collodion film

Antimony, tin, mercury, copper, silver, gold, celluloid sheet, iron pyrites, brass, sheet rubber A", platinum, gun cotton, collodion film, zylonite... 

The developer Is mads thus t—Dissolve one ounce of powdered nitrate of baryte In sis teen ounces of boiling distilled water, and when cold, add two drachms of nitric acid, specific gravity 1 42. Next add one ounce and a half of powdered protosnlphate of Iron. Shake well until the iron salt is dissolved. The mixture becomes white and turbid, in consequence of the formation of sulphate of baryta. Let this settle to the bottom of the battle, and then decant and filter the clear liquid, which is of a green color, and is a mixture of protonitrate and protosnlphate of iron. Add two ounces of alcohol to make It flow better Over the collodion, film. It Is now ready for use. It deteriorates by keeping, and acts much better when fresh. 

The size fractions measured by electron microscopy were redispersed before filtration in a sonic shaker. About 100-200 was transferred to a microscope slide. After drying, a small amount of collodion (4% in amyl acetate) was added, and the solvent was allowed to evaporate. The collodion film was scribed into 3 mm. squares, floated off on water, and gathered on electron microscope grids. 

It was considered likely that any fine structure present might not be obvious owing to lack of contrast. In an attempt to reveal any structures present, samples of vitrinite were evacuated at 10" mm. Hg for several days and then impregnated with a saturated aqueous solution of lead acetate. The solution was allowed to dry over a period of several days and then some of the vitrinite was freed from the encrusting lead acetate, crushed finely, and dispersed on a carbon-collodion filmed grid. 

The brominated sticks are embedded in Spurr epoxy resin (Spurr 1969) and sectioned with a diamond knife or glass knife mounted on an ultramicrotome to give cross sections of 0.15//m thickness for TEM-EDXA or 0.5//m thickness for SEM-EDXA. The sections are then placed on a carbon-coated collodion film on the specimen support grid. The specimens are carbon-coated again to avoid charging. 

Three partial electrogenic reactions have been found to contribute to the total electrogenesis directly measured in the proteoliposome-collodion film system ... 

Unstained RTT fibril, greatly stretched by accidental breaking of supporting collodion film. Reprinted from Schmitt, Hall and Jakus. 

D. Brewster, and J. H. Gladstone have been previously discussed. M. G. Mellon studied the colour of soln. of different concentration. I. Plotnikoff and M. Kar-shulin measured the absorption spectrum and the region of photochemical sensitivity for collodion films with methyl alcohol as acceptor. M. S. Sherrill found the eq. conductivity, A mho, corrected for hydrolysis, for m grm.-equivalents of the salt per litre at 18°, to be. ... 

Electron microscopy represents the only direct method that permits to see with our own eyes the interior of a sample with a resolution of a few nanometers. To characterize the texture of hypercrosslinked polystyrenes both transmission and scanning electron microscopy have been appfied. In the former case, ultrathin sections with a thickness of about 600 A were cut firom a sample fixed in epoxy resin, and then directly examined in transmission mode. Alternatively, two-step replicas have been prepared firom the cleavage face. To prepare the repfica the surface was first coated with a collodion film appfied from amyl acetate solution, and then with a carbon—platinum film. Finally, the collodion support was dissolved and the free carbon—platinum repfica examined under a transmission microscope. 

In order to collect raindrop individually, the collodion film replication method was applied (Ma et al. 2001a, 2004a). A 200 pL of viscous collodion solution (3 %) was mounted onto the Mylar (CioHg04) film with a 10 pm thickness just before sampling. When raindrops fell onto the thin layer of collodion film (130 10 pm), they gently settled. By allowing the alcohol and ether to evaporate, a thin film... 

As mentioned above, it is possible to maintain insoluble particles, which were scavenged by raindrop, on individual raindrop replicas by collodion film technique. These insoluble particles are the target of micro-PIXE analysis. An example of the elemental map for Si, S, Cl, K, Ca, and Fe is drawn in Fig. 8. Each elemental map was drawn on the 128 x 128 pixels by scanning of about 1 pm micro beam on the sample surface. Because the residual particles were retained on a raindrop replica as several clusters, we could not radiate the microbeam to individual residual particles. However, the visualized elemental maps of six element types in several particle clusters enable us to estimate the chemical mixing state of raindrop residual particles. In addition, it is also presumed that the chemical transformation of dust particles is made by wet scavenging processes. 

A comparative investigation was carried out on epicuticular and intracuticular waxes from silicles and leaves of Lunaria annua L. Young silicles (main axis ca 15 mm, developmental stage 1) and green premature silicles (main axis ca 40 mm, developmental stage 2) were examined using collodion films to separate epicuticular and intracuticular waxes for subsequent chemical analysis essentially as described earlier (Haas and Rentschler 1984). Waxes from the adaxial side of fully expanded leaves were also examined. 

Nitrate Nitric acid 1.5-3.0 Sol MeOH, PhNOj, ethanol-ether Insol HjO, ethanol, ether, C H Collodion, films, fibers, explosives... 

---