Silver foil

Fig. 2.6 Adsorption of gases on silver foil. (a) BET plots h) adsorption isotherms. (Solid symbols are desorption points.) (Courtesy Davis, Dc Witt...

Dick and Styrus [63] report real-time resistivity measurements on shoek-loaded silver foils. The inferred vaeaney eoneentration is 1.5 x 10 per atomie site for samples shoek loaded to 10 GPa. The eombined effect of point-defect generation and reeombination to form vaeaney clusters, for example, can be influential on pulse-duration effeets such reload, release, and recovery. This topie has not yet reeeived the degree of experimental study that it deserves. 

J.J. Dick and D.L. Styrus, Electrical Resistivity of Silver Foils Under Uniaxial Shock-Wave Compression, J. Appl. Phys. 46, 1602-1617 (1975). 

The work of Dick and Styris [75D01] is sufficiently detailed to establish values for vacancy concentrations in silver samples in which resistance measurements were taken. In this work, 15 to 25 yrm-thick silver foils were... 

Fig. 5.18. The resistivity of shock-compressed silver foils in excess of that caused by pressure is shown as a function of shock stress. This excess is thought to be due to shock-induced concentrations of point defects ([75D01], after Graham [81G02]).

Rausch-gelb, n. orpiment. -gift, n. narcotic poison or drug, -gold, n. Dutch gold, tinsel, -leder, n. chamois (leather), -mittel, n. intoxicant. -rot, n. realgar, -silber, n. imitation silver foil. 

Silber-fluoriir, n. silver subfluoride, -fohe, /. silver foil. 

Apparatus. Use the apparatus of Section 14.7. The generator anode is of pure silver foil (3 cm x 3 cm) the cathode in the isolated compartment is a platinum foil (3 cm x 3 cm) bent into a half-cylinder. For the potentiometric end point detection, use a short length of silver wire as the indicator electrode the electrical connection to the saturated calomel reference electrode is made by means of an agar-potassium nitrate bridge. 

GP 2] [R 3a] The performance of one micro reactor with three kinds of catalyst -construction material silver, sputtered silver (dense) on aluminum alloy (AlMg3), and sputtered silver on anodically oxidized (porous) aluminum alloy (AlMg3) -was compared with three fixed beds with the same catalysts [44]. The fixed beds were built up by hackled silver foils, aluminum wires (silver sputtered) and hack-led aluminum foils (anodically oxidized and silver sputtered), all having the same catalytic surface area as the micro channels. Results were compared at the same flow rate per unit surface area. 

Based on the general scenario provided above, the analytical method to determine transference or transport numbers has been devised and is carried out in an apparatus which can essentially be regarded as an improvement over the Hittorf apparatus. This consists of two vertical tubes connected together with a U-tube in the middle all three tubes are provided with stop-cocks at the bottom. The U-tube is also provided with stop-cocks at the top by closing these, the solutions in the cathode and anode limbs can be isolated. The silver anode is sealed in a glass tube as shown, and the cathode is a piece of freshly silvered silver foil. The apparatus is filled up with a standard solution of silver nitrate and a steady current of about 0.01 ampere is passed for 2-3 hours. In order to avoid the occurrence of too large a change in concentration it is necessary to pass the current only for a short duration. The... 

Tornieporth-Oetting, I. C. et al., Angewand. Chem. (Int.), 1995, 34(5), 511 The solid, liquid and vapour are all very shock-sensitive [1]. The liquid explodes on contact with arsenic sodium, silver foil or phosphorus. Explosion is likely to be triggered by pressure fluctuations of around 10 Pa [3], Concentrated solutions in organic solvents may explode on shaking [2],... 

Figure 7.1 Schematic illustration of the electron cycles that ultimately cause a sensation of pain in the teeth in people who have metallic fillings and who have inadvertently eaten a piece of aluminium ( silver ) foil, e.g. while eating sweets...

Diffusion of oxygen through silver membranes has also been reported (Yunoshin 1967). It was however necessary to incorporate additives to stabilize the silver foils, because pure silver is not stable in oxidizing environments. 

Fig. 10.11 Anodic current/overvoltage plot for silver foil at a temperature of TOOK (b) original experimental data (a) after correction for Rq.

The unit-dose packaging of the quinolone, Levaquin (Levofloxaein antibaeterial), is silver foil with black letters. The dose is reverse shaded. A reporter noted that the packages have to be held at just the right angle to be able to read the label. It was reported to be especially difficult to differentiate between the 250 and 500 mg strengths because the numbers were so diffieult to see. 

Although fibrosarcomas have been reported in animals after subcutaneous imbedding of silver foil, normal routes of exposure have not provided indications of carcinogenicity in animals or humans, and silver is not expected to be carcinogenic in humans. ... 

Polonium, however, can be readily recovered from aged silver foils by dissolving them in nitric acid and precipitating the silver with hydrochloric acid little or no polonium is lost by adsorption on the precipitated chloride provided the acidity is high. An insoluble black residue, left after the bulk... 

Let a thought experiment be performed. In it, the metal electrode (a silver foil, say) is introduced into an aqueous solution (containing, say, ions of silver) so quickly (and without causing any disturbance in the solution) that suddenly the metal atoms of the silver fori, the molecules of water, and the Ag+ ions are confronting each other, none of them having had time to adjust to the newly created situation. 

Silver foil is transformed by an aq. soln. of the trichloride into silver chloride and iodide silver oxide with an excess of the trichloride is transformed into the chloride and iodic acid with more silver oxide, silver iodate is formed and with an excess of the oxide and a boiling soln. some silver periodate is formed. Mercuric oxide is slowly transformed into mercuric chloride and oxide chlorine, oxygen, and possibly chlorine monoxide are evolved. Aq. soln. of the trichloride give a precipitate of iodine with a little stannous chloride with more stannous chloride, some stannous iodide is formed. Consequently, although chloroform extracts no iodine from the aq. soln., it will do so after the addition of stannous chloride. Sulphur dioxide and ferrous sulphate are oxidized. 

Coated E-glass slide surface. (A) Positive ions. As shown in Fig. 3 and Table 3, the major components on the heat-cleaned surface are Si (m/z = 28), A1 (m/z = 27), and Ca (m/z = 40). However, from Table 4 it can be seen that the aluminium surface concentration after treatment with HAPS was still very intense and increased after extraction with warm and hot water. These results are consistent with the XPS results shown in Figs 1 and 2, and are further indicative of aluminium becoming an integral part of the surface coating. Moreover, for the HAPS deposited from deionized water onto silver foil (99.99%), the peak at... 

If an all-glass apparatus is not available, it is advisable to protect all cork connections with silver foil. 

Following fires in which endotracheal tubes became ignited by surgical lasers or electrocautery in atmospheres enriched by oxygen and/or nitrous oxide, the flammability of PVC, silicone rubber and red rubber tubes in enriched atmospheres was studied [1], Ozonised oxygen was reacted with hydrogen at low pressure to generate hydroxyl radicals. Pressure in the apparatus was maintained by a vacuum pump protected from ozone by a tube of heated silver foil. On two occasions there was an explosion in the plastic vent pipe from the vacuum pump. The vent gas should have been outside explosive limits and the exact cause is not clear the editor suspects peroxide formation. 

Figure 4. SIMS spectra of phenanthrene taken from silver foil, ammonium chlroide, carbon, and liquid gallium/indium alloy. Reproduced with permission from Ref. 103. Copyright 1983, Elsevier Science Publishing Co.

Silver foil test. H2S evolved from slightly acidified sample can blacken a strip of silver foil due to the formation of silver sulfide. Silver is cleaned by dipping in NaCN solution prior to exposure. 

The velocity of deposition of radioiodine, defined as in equations (2.3) and (2.4), is controlled by the rate of adsorption at the surface. When the adsorption or chemisorption at the surface is strong, the rate of deposition of 131I, when expressed in terms of suitable non-dimensional parameters, is similar to the rate of heat transfer to or from the surface (Chamberlain, 1953). In field experiments, artificial leaves of copper or silver foil were attached to vegetation, and it was found that the uptake of 131I to real leaves was typically 0.4 to 0.7 times the uptake to artificial leaves. Since a thin film of paraffin was found to inhibit... 

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