Powder Powdery

Pulver-band, m. (Expl.) powder strand, -biatt-chen. n, (Expl.) powder flake, powder grain, -brennztlndung, /. powder-train ignition, -dampf, in. powder smoke, -dlagramm, n. powder pattern, -fabrik, /. powder factory, -fabrikation, /. powder manufacture, -fass, n. powder cask, powder keg. -fiascbe. /. powder bottle (wide-mouthed bottle), pulverfdrmig, a. in the form of powder, powdery, pulverulent. 

Crains compared to Powders Powdery Solids compared to Liquids... 

The CNTs were prepared by the group at EPF in Lausanne [10] following the method of Ebbesen et al. [ll]. A 100 A, 20 V dc arc between a 6.5 mm diameter graphite anode and a 20 mm graphite cathode is sustained in a 6.7x10 Pa helium atmosphere for about twenty min. Nanotubes were found on the cathode, where they were encapsulated in a cylindrical 1 cm long shell. The shell was cracked and the powdery soot-like deposit extracted. The powder was then... 

Puder, m. powder, puderig, a. powdery, pudem, v.t. powder. 

Zinn-probe, /. sample, test, or assay of tin. -puder, m. powdery tin dross, -pulver, n. powdered tin, grain tin. -rafhnation, /. tin refining or refinery. 

Palladium proved especially useful in the hydrogenation of 2-hydroxy-3-nitropropanoic acid. Reduction over palladium-on-carbon gave pure, powdery isoserine, whereas platinum failed to reduce the nitro function under neutral or acidic conditions reduction over Raney nickel gave a bright green powder (96). 

Surface preparation of concrete consists mainly of removing laitence, form oils and air pockets. Laitence is the fine cement powder that floats to the surface of concrete when it is placed. Coatings applied over such a powdery, weak layer will lose adhesion. Form oils are used for the easy stripping of forms or shuttering. Their presence will also cause loss of adhesion of subsequent coatings. Forms should be coated with non-migratory hard coatings and the use of oils or waxes prohibited. 

Powder metallurgy is concerned with production and processing of powdery forms of metals and materials and of solid industrial products therefrom. 

Limiting currents measured for a deposition reaction may be excessively high due to surface roughness formation near the limiting current. Rough deposits in the case of copper deposition have been mentioned several times in previous sections, since this reaction is one commonly used in limiting-current measurements. However, many other metals form dendritic or powdery deposits under limiting-current conditions, for example, zinc (N lb) and silver. Processes of electrolytic metal powder formation have been reviewed by Ibl (12). 

Physical state White, odorless, almost tasteless, hygroscopic powdery salt, resembling powdered sugar or baking powder... 

When mechanical vibration of bis(pyridinium) salts (see Scheme 5.5) was conducted with a stainless steel ball in a stainless steel blender at room temperature under strict anaerobic conditions, the powdery white snrface of the dicationic salts turned deep blue-purple (Kuzuya et al. 1993). Single-line ESR spectra were recorded in the resnlting powder. No ESR spectra were observed in any of the dipyridinium salts when mechanical vibration was conducted with a Teflon-made ball in a Teflon-made blender nnder otherwise identical conditions. When observed, the ESR signals were quickly quenched on exposnre to air and the starting dicationic salts were recovered. Each of the resulting powders was dissolved in air-free acetonitrile, and the ESR spectra of the solution were recorded after the material had been milled nnder anaerobic conditions. Analysis of the signal hyperflne structure confirmed the formation of the corresponding cation-radicals, which are depicted in Scheme 5.5. 

Dry, powdered ammonium sulfate may be formed by spraying sulfuric acid into a reaction chamber filled with ammonia gas. The heat of reaction evaporates all water present in the system, forming a powdery salt. 

Black Powder. Kokushokuyaku (Black Color Explosive) or Yuenyaku (Nonsmokeless Powder) Gunpowder — Kayaku. Black, loose-powdery material consisting of K nitrate, sulfur charcoal. It was used during WWII for the follow-... 

Note Since the above powdery expls contain Na nitrate, they have been sometimes called "Powdery Dynamites with Explosive Base . The same applies to expls contg K nitrate. There have been, however, powdery Dynamites which contained real expl ingredients (lijre NC) in addn to NG. To such expls belongs Abel s Dynamite contg NG 65.5, powdered Guncotton 30.0, K nitrate 3.50 Na carbonate, patented in... 

It might be of interest to include here a list of powdery explosives, developed under the name of Standard Dynamites between WWI and WWlI at rhe laboratory of Apache Powder Company, Benson, Arizona, leading manufacturers of explosives for die Western USA. This was obtained from the late Dr I.A. Grageroff, former employee of... 

Closs VIII Nitrostarch Dynamites. These powdery expls began to be manufd in the USA shortly after turn of this century, and they are made nowhere else. The name of the concern which manufactures them nearly exclusively is the Trojan Powder Company of Allentown, Pennsylvania. In these expls Nitrostarch (NS) is used as the sensitizing agent instead of NG, NGc or other liquid organic nitrates of ordinary Dynamites, or instead of TNT, RDX, etc of Military Dynamites, described here as Class X... 

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