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Tube products

As can be seen most of the tubes were still in a non-sensitive state while about ten were in runaway conditions. This wiU give an operational feel for how uniform the catalyst charge should be and how closely the system may approach incipient runaway, for a single tube in a multi-tube production unit. [Pg.205]

These drenches and tubing products are often given over extreme ranges of temperatures in field conditions. The formulator must take this into consideration when developing the dosage formula and testing it in the administration equipment. [Pg.727]

The extent of formation of these NOC depends upon the presence of nitrogen oxides present in the atmosphere during the manufacturing cycle. The major contaminants are NDMA, A-nitrosodiethylamine (NDEA), A-nitrosopyrrolidine (NPYR), NMOR, A-nitrosodiphenylamine (NDPhA), A-nitrosopiperidine (NPIP) and A-nitrosodibutylamine (NDBA)68. NMOR was found in the hot process areas NDMA occurred in tube production areas in which NDPhA was being used as retarder and tetramethylthiuram disulphide as an accelerator. Figure 12 shows a proposed reaction scheme of formation of NOC in the rubber industry and subsequent exposure67. [Pg.1184]

Evaporative coating, crystal pulling, mass spectrometers, tube production, electron microscopes, electron beam plants, and particle accelerators. [Pg.61]

The thiourea (1.2 equiv.) and the a-chloro ketone (1 equiv.) were mixed, placed in quartz tube, and introduced into a Synthewave 402 (Prolabo) single mode apparatus (4 cm, (j>, reactor) with a temperature monitored at 80 °C. The mixture was irradiated for the time given in Table 1. Thiazolinium salts precipitate in the tube. Products were isolated by crystallization from ether. The free iminothiazo-line is obtained by treatment with aqueous ammonia followed by extraction with CH2C12. Reactions under classical heating are carried out without solvent in an oil bath previously set at 80 °C during the same time. [Pg.266]

Membranes can be made as flat sheets in long rolls or in the form of thin, hollow tubes. Production of current gas-separation membrane modules is divided approxi-... [Pg.168]

Michael C. Kasprzyk, Large Silicon Carbide Radiant Tube Production Process, in Silicon Carbide 87, ed. D. Cawley, The American Ceramic Society, Columbus, OH, 1989, pp. 387-394. [Pg.154]

Other benthic suspension feeders may have increased in abundance to occupy the niche formerly filled by C. virginica. For example, in certain areas of the lower Chesapeake Bay it has been reported that 35—100% of net plankton community production may be transferred from the pelagic to the benthic zone to support production of the polychaete, Chaetopterus c variopedatus and its tubes, given an ecological transfer efficiency of 10% (Thompson and Schaffner, 2001). Tube production by suspension feeders may be a mechanism by which nitrogen is transferred to and retained in sediments. Approximately 12% of the N flux to the benthos in central Long Island Sound, NY, reportedly is necessary to support tube production by the sea anemone Ceriantheopsis americanus (Kristensen et al., 1991). [Pg.896]

Oxidation of H2 to H2O (T=810-10940C) Pi Ca0-Zi02 (tube) Productivity limited by electrical resistance of membrane Weissbaitand Ruka, 1962... [Pg.358]

The principle of the hollow cathode tube, production of a vapor of atoms by cathodic sputtering, has been employed by Gatehouse and Walsh (Gl) for sample vaporization. The sample is introduced into a vacuum chamber and is made the cathode which produces a cloud of activated atoms. The light of a separate hollow cathode tube is passed through this vapor and absorption is measured in a spectrophotometer. [Pg.14]

Tube Production. Figure 1 shows in schematic form the technique for tube production and poling at the neck. Isotropic form II PVDF tube was continuously produced from an 18 mm screw extruder and oriented along the tube axis in a heated region between two caterpillar haul-offs. An earthed wire was fed via the cross-head... [Pg.400]

Use cleaned plastic collection tubes with stoppers. The whole set (tube and stopper) must be tested to deliver less than 10% extraneous amounts of cadmium. Do not use coloured stoppers. Do not use plastics with a Cd-softener. Before starting the study test 6 test tubes per tube production lot. During the study frequently test blank tubes, e.g. for 1% of the total number of samples to study. Test may be performed with a 1% v/v solution of nitric acid (e.g. Suprapur quality) in bidistilled water. Preferably use vacuum collection tubes. No special type of needles is required. Needles of stainless steel are adequate. Other needles, e.g. siliconized or iridium needles may be used as well but are not necessary. Use vinyl gloves, free of talc. Use cleaned plastic test tubes. See further collection tubes. Do not use glassware. [Pg.330]

Tube products use their own package as the mould. The tube is dispensed from a stack into a holder where it is held vertically by its rim. The liquid mix is dispensed into the tube, and the lid is picked up from a stack, placed on top by a vacuum sucker and heat-sealed onto the rim. The filled and sealed tubes are then frozen on a conveyor belt in the hardening tunnel. [Pg.92]

Copper pipe Prevention by improved tube production... [Pg.266]

Startg. bromolactonecarboxylic acid heated 1 hr. at 150-160 in a sealed tube -> product. Y 66%. - This is part of a simple stereospecific synthesis of dl-muscarine. Also formation of a 2,5-/rfln5-compound s. T. Matsumoto, A. Ichihara, and N. Ito, Tetrah. Let. 1968, 1989. [Pg.77]

Retention of ester groups. Equimolar amounts of startg. nitrile and tetrafluorophthalic acid heated at 135° for 4 days in a heavy-walled glass pressure tube product. Y 56%. Work-up is simple since no solvent is required. F.e.s. W.D. Rounds, G.W. Gribble, Tetrahedron Letters 29, 6557-60 (1988) from carboxylic acid amides with tetrachloro-or tetrafluoro-phthalic anhydride s. ibid. 6553-6. [Pg.54]

To overcome the latter, the use of a multi-feed configuration can be used. Figure 7.11 illustrates the general principals of the process. Using such a setup, a continuous tube production with high material throughput rate is possible and the winding process can be used for series production, for example pressure vessels for the truck industry (Fig. 7.12). [Pg.194]


See other pages where Tube products is mentioned: [Pg.125]    [Pg.152]    [Pg.237]    [Pg.726]    [Pg.211]    [Pg.222]    [Pg.128]    [Pg.391]    [Pg.61]    [Pg.669]    [Pg.638]    [Pg.643]    [Pg.93]    [Pg.222]    [Pg.281]    [Pg.375]    [Pg.133]    [Pg.327]    [Pg.195]    [Pg.172]    [Pg.360]    [Pg.293]    [Pg.108]    [Pg.166]    [Pg.504]   
See also in sourсe #XX -- [ Pg.90 , Pg.92 , Pg.100 ]




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