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Metal turnings

E. Wiedemann (1876) replaced the heating coil and metal boxes by-metal tubes filled with metal turnings, thus exposing a larger surface to the gas. [Pg.10]

Although liquid Hg would never be used as a reference (model) surface in surface physics because its liquid state and high vapor pressure do not allow appropriate UHV conditions, this metal turns out to be a reference surface in electrochemistry for precisely the same reasons reproducibility of the surface state, easy cleaning of its surface, and the possibility of measuring the surface tension (surface thermodynamic conditions). In particular, the establishment of a UHV scale for potentials is at present based on data obtained for Hg. [Pg.16]

Magnesium metal turnings from Fisher Scientific Company or Mallinckrodt Chemical Works were used. Excess magnesium or incomplete formation of the Grignard must be avoided, since any... [Pg.63]

The most fundamental issues of the structures of heavier group 14 element-centered anionic derivatives R3EM (R = alkyl, aryl, silyl E = Si, Ge, Sn, Pb M = alkali or alkaline earth metals) turned out to be the questions of their aggregation states (monomeric, dimeric, or oligomeric), nature of the E-M bond (covalent or ionic), and configuration of the anionic centers E (tetrahedral, pyramidal, or planar). The most important experimental techniques that are widely used to clarify these questions are NMR spectroscopy and X-ray diffraction analysis. [Pg.93]

Grignard reagents are usually prepared by the reaction of an organohalide and magnesium metal (turnings) in an ether solvent. [Pg.479]

Heavy dusts Heavy/wet sawdust, metal turnings, foundry tumbling barrels and shake-out, sand blast dust, wood blocks, brass turnings, cast iron boring dust, lead dust 4000-4500 20-23... [Pg.757]

Medieval brass), although the problems of electrochemical surface modification due to corrosion are minimized if the first few turns of the drilling are discarded and only bright metal turnings are used. [Pg.208]

Fig. 2. Metallothermic reduction at 1525 K of Am02 by La metal as a function of time O and , mixtures of Am02 powder and La metal turnings A, pelletized mixture of Am02 powder and ground La metal turnings. Fig. 2. Metallothermic reduction at 1525 K of Am02 by La metal as a function of time O and , mixtures of Am02 powder and La metal turnings A, pelletized mixture of Am02 powder and ground La metal turnings.
Expls may be machined to the same tolerances as metals. Turning and milling to a thousandth of an inch is not difficult with a good machine. However, the practical applicability of such precision is limited by the dimensional instability of most expl materials... [Pg.613]

Chloride gas. Magnesium metal turnings, Arsenic trichloride, Tetrahydrofuran, Pentane, Sodium sulfate Diethyl ether, Dichloromethylphosphine, Ethyl alcohol, N,N-Diethylamine, 2-Diisopropylaminoethanol, Rhombic sulfur Hexachloroethane, Zinc powder... [Pg.117]

Ethyl chloride. Magnesium metal turnings, Tetrahydrofuran, Arsenic trichloride,... [Pg.154]

Ethyl chloride. Magnesium metal turnings, Tetrahydrofuran, Arsenic trichloride. Hexanes Tetraethyl lead. Arsenic trichloride Ethylenediamine, Nitric acid. Ethanol Nitric acid. Ethanol, N,N"-Diethanolethylenediamine Dinitrate ethylene glycol. Nitric acid. Sulfuric acid Ammonium nitrate. Water, Oil, Oleic acid. Sodium hydroxide Sulfuric acid, Erythritol, Nitric acid. Sodium carbonate. Ethanol... [Pg.330]

A. AMALGAMATED, OXIDE-FREE URANIUM METAL TURNINGS... [Pg.309]

In a typical procedure, approximately 30 g of uranium metal turnings are cut into small strips of approximately 0.5-1.5 in. in length using steel scissors and transferred to a 250-mL Pyrex beaker inside a well-ventilated fume hood. Concentrated nitric acid (16 M) is added to just cover the uranium turnings. The turnings are swirled with the acid approximately 1 min. [Pg.309]

It is well known through our experience that material with conduction electrons suffer from the phenomenon called corrosion i.e., metals turning into metallic oxides in time in air. On the other hand, the materials without conduction electrons do not suffer from corrosion. Technically, the presence of conduction electrons implies the existence of free electrons and conduction band. As pointed out in the mechanical property section these two distinct properties exhibit themselves also in term of plasticity . That is, the existence of free electron band allows plastic deformation whereas in the absence of free electron band the plasticity is nonexistent. It is recalled that the theory we are proposing for metals and alloys requires not only the coexistence of covalent bond and free electron band but also that the ratio of the number of these two type of electrons be maintained at a constant value for a given metal. Within such understanding, we now construct corrosion process in steps ... [Pg.182]

A three-neck, round-bottomed flask containing magnesium metal turnings (7.2 g, 0.299 moles), is equipped with a Friedrich condenser and kept under a nitrogen atmosphere. Tetrahydrofuran (300 ml) is added and the contents are allowed to stir. A solution of l-chloro-5-methoxyheptane (48.1 g, 0.292 moles) is added in small portions and refluxed. The mixture is allowed to stir for 3 hours. The resultant dark yellow solution is cooled to -25°C, and the condenser is removed and replaced with a dry ice addition funnel. A solution of 3-chlorocyclopentene (29.9 g, 0.292 moles) is added over a period of one hour. The viscous solution is poured into two liters of saturated ammonium chloride, extracted with ether, and dried over anhydrous sodium sulfate. Distillation yields 3-(5-methoxyhept-l-yl)cyclopentene (51.5 g, 0.262 moles) as clear, colorless oil boiling at about 90°C/0.3 mm and 54°C/0.1 mm. [Pg.1034]

Materials copper metal (turnings or wire), 13 grams = 0.2 F.W. [Pg.138]


See other pages where Metal turnings is mentioned: [Pg.439]    [Pg.41]    [Pg.452]    [Pg.150]    [Pg.409]    [Pg.452]    [Pg.277]    [Pg.409]    [Pg.284]    [Pg.123]    [Pg.29]    [Pg.253]    [Pg.32]    [Pg.413]    [Pg.185]    [Pg.250]    [Pg.277]    [Pg.6]    [Pg.452]    [Pg.308]    [Pg.309]    [Pg.309]    [Pg.310]    [Pg.311]    [Pg.862]    [Pg.370]    [Pg.190]    [Pg.9]    [Pg.12]    [Pg.542]   
See also in sourсe #XX -- [ Pg.260 ]

See also in sourсe #XX -- [ Pg.149 ]




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Amalgamated, Oxide-Free Uranium Metal Turnings

Turning

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