Photographic plates/film

The famous experiment proposed by Aharonov and Bohm [53,54] is schematically represented in Fig. 6. In such an experiment, a source emits an electron beam directed toward a wall in which two slits, located on each side of the beam axis, are located. A photographic plate (film) placed behind the slits records impacting electrons. After the emission of a large number of electrons by the source, the aforementioned film exhibits neat, clear, and dark fringes that are parallel to the slits. This result is interpreted as a manifestation of the wave nature of electrons. 

Mass spectrograph. An instrument in which beams of ions are separated according to their mass-to-charge ratio (m/z) and in which the deflection and intensity of the beams are recorded directly on a photographic plate or film. 

Compression molded (150°C for 3 minutes press chilled with cold water immediately thereafter) samples of poly(trans-l,4-hexadiene) (14) and poly(5-methyl-l,4-hexadiene) were examined with a General Electric (XRD-3) X-ray unit. Transmission Laue X-ray photographs were taken using nickel filtered copper X-radiation. Samples were stretched to four times of their original lengths to obtain oriented fibers. The fiber patterns were obtained in a flat plate film holder with the specimen to film distance standardized at 5 centimeters. X-ray diffraction patterns were similarly obtained for the hydrogenated sample of poly(5-methyl-l,4-hexadiene). 

Autoradiography offered an alternative technique. The earliest experiments followed the uptake of radioiodine into the thyroid by placing the tissue sections in direct contact with photographic plates (Hamilton, Soley, and Eichom, 1940 Leblond, 1943). Belanger and Leblond introduced the use of liquid emulsion in 1946. Initially this was painted onto sections mounted on microscope slides. Later, slides were dipped into liquid emulsion (Joftes and Warren, 1955) or wrapped around with stripping film (Doniach and Pelc, 1950). Semiquantitative comparisons... 

A transition step between the reaction system just considered (silver ions, p-phenylenediamine, silver sol) and actual physical development of a fixed photographic plate or film is supplied by the investigations of Arens (27, 28). He used a series of silver, gold, and silver sulfide sols which had been coated on glass plates, using gelatin as the binding material. In this way he obtained plates in which colloidal particles... 

BLOOM, In surface-coating technology, bloom is a whitish, filmy layer that appears on films of paints, varnishes, or lacquers due to contamination from the atmosphere. The term is also applied to a filmy layer deposited on a photographic plate by tap water, which can be removed by rubbing the plate with wet cotton. The term bloom is used in metallurgy to denote a mass of malleable iron from which the slag has been removed See also Iron Metals, Alloys, and Steels. 

Several methods have been adopted for the measurement of flame speeds. If the flames are sufficiently actinic to affect a photographic plate, permanent records may be obtained on revolving drums bearing the films. Mallard and Le Chatelier 2 employed this method m their researches on mixtures of carbon disulphide with nitric oxide or oxygen, the flames of which are well known to be highly actinic, whilst Mason and Wheeler 3 were able to apply the method with conspicuous success to mixtures of acetylene and air. The actual flame speed is obtained by comparison with the waves made simultaneously on the photographic drum by means of a tuning-fork of known frequency. 

Note "Photographic or Cinematographic Goods" refers to HS (Harmonized Commodity Description and Coding System) Code 37. Products in this classification include "photo plates and film, flat, sensitized, unexposed photo film in rolls sensitized, unexposed photo paper, paperboard and textiles, sens, unexposed photo plates, film, paper, etc, exposed, not developed photo plates and still film, exposed developed motion-picture film, exposed and developed photographic chemicals, unmixed products retail packed."... 

Practice for Storage of Processed Safety Photographic Film Practice for Storage of Processed Photographic Plates Practice for Storage of Black-and-White Photographic Paper Prints... 

Soon after the discovery of the silver halide photographic plate, researchers found that light was not the only factor capable of forming a latent (developable) image on a photographic film. The first of these... 

The oldest track detectors are photographic plates. They led to the detection of radioactivity by Becquerel in 1896. Photographic emulsions on plates or films indicate the position of radionuclides (autoradiography). The main advantage of autoradiography is the possibility of exact localization of radionuclides emitting a or f rays. 

Autoradiographs may be obtained by pressing a photographic plate or film on the surface of the sample or by the stripping-film or liquid emulsion techniques. 

Exposure of the sensitive surface of the film or the photograph plate in the spectrograph is controlled by a mechanical system which, after each exposure, displaces the film and presents a new surface area in the window containing the lines. It is thus possible, depending on the systems, to record several spectra on the same support (Fig. 3.4). 

You learned earlier that Becquerel discovered radioactivity because of the effect of radiahon on photographic plates. Since this discovery, several other methods have been devised to detect radiation. The effect of radiation on photographic film is the same as the effect of visible light on the film in your camera. With some care, film can be used to provide a quantitative measure of radioactivity. A film badge is a device containing a piece of radiation-sen-sihve film that is used to monitor radiation exposure. People who work with radioactive substances carry film badges to monitor the extent of their exposure to radiation. 

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