Gold Ribbon Research Articles

Inert gas ion bombardment induced work function changes in polycrystalline tungsten and gold ribbon

The interaction of jack bean urease with dodecyl trimethylammonium bromide (DTAB), tetradecyl trimethylammonium bromide (TTAB), and hexadecyl trimethylammonium bromide (HTAB) was studied by microcalorimetry atT= 300 K and equilibrium dialysis at temperatures of 300 K and 310 K in alkaline solution at PH = 10.0. The enthalpy of binding was calculated from binding data with were obtained from equilibrium dialysis in terms of the Wyman binding potential theory related to the van't Hoff relation. The enthalpy of urease unfolding was determined by subtraction of the microcalorimetric enthalpy (binding and unfolding enthalpies) and the enthalpy of binding. The enthalpy of urease unfolding, in the presence of DTAB, TTAB, and HTAB, was 7200 kJ·mol−1.

943. Inert gas ion bombardment induced work function changes in polycrystalline tungsten and gold ribbon: R P W Lawson and G Carter,Vacuum, 18 (4), April 1968, 205–211

943. Inert gas ion bombardment induced work function changes in polycrystalline tungsten and gold ribbon: R P W Lawson and G Carter,Vacuum, 18 (4), April 1968, 205–211

Inert gas ion bombardment induced work function changes in polycrystalline tungsten and gold ribbon

Polycrystalline tungsten and gold ribbon targets were bombarded with low-energy (100eV–600eV) inert gas ions of helium, argon and krypton. The thermionic work function of the target was monitored before and after bombardment by a retarding potential field method in a diode valve with the target as the anode. Work function recovery was monitored during post-bombardment step annealing studies. Bombardment-induced work function increases of several tenths of an electron volt in tungsten were recovered in annealing stages corresponding to surface vacancy migration and gas releasefrom the surface regions. Smaller work function reductions in gold targets were annealed in stages corresponding to damage diffusion, normal diffusion and gas bubble diffusion processes.

Korean Bamboo English Once More

OMEWHERE NORTH OF SEOUL, KOREA' is the phrase used by Army publicity I agents to make romantically vague the location of some thousands of American troops defending the DMZ or Demilitarized Zone between North and South Korea. This study attempts to describe functionally' the language which these men use to communicate with the indigenous personnel or gooks who serve the American Army as allies or laborers. It is based on the memory of my life as a soldier there between April, 1955, and July, 1956, and on an appended 'folk document' which fell into my hands at that time, 'The Story of Cinderella-San.'2 With this functional analysis, I hope to supplement earlier studies which concentrate on vocabulary, chiefly those of Arthur M. Z. Norman and John T. Algeo.3 My memories differ from those of Mr. Algeo on three specific items. First, number one and number ten replaced the number one-number nine system of indicating valuation which he describes. Secondly, short time refers, as he says, to a brief encounter with a Korean girl for amatory purposes. Shorttimer, however, still was used to indicate a person nearing his EDDFEC (Estimated Date of Departure Far East Command), and a person who was within thirty days or so of this date was unofficially allowed to wear a shorttimer's ribbon, the black and gold ribbon wrapped around a bottle of Seagram's whisky. FIGMO was not used to indicate imminent return to the land of the big PX, or the zone of the interior. Thirdly, some terms were probably unique to the situation of a field army, notably the description of illicit nocturnal activity outside the compound as paddy hopping, and the designation slickey boys applied to the children who lived by stealing from the soldiers. Most of the Koreans with whom the average G.I. had a chance to talk belonged to what the nineteenth century called the 'lower orders'; they worked as house-

The structure of thin films. Part VII.-Critical evaporation phenomena at low compressions

The measurements of compression and area on monomolecular films of fatty substances on water surfaces, described previously (1), were limited in accuracy by the disturbing effect of the jets of air necessary in the apparatus employed for measuring compression, for the purpose of preventing escape of the films past the barrier confining one end of the films. We think the error in measurements of compression with this apparatus may have been as large as half a dyne per centimetre in extreme cases, and as the apparatus was used under fairly accurately reproducible conditions, it was of the nature of a constant error. The reality of the lowest portion of the compression-area curves was therefore open to doubt. We have now designed an apparatus in which the gap at the ends of the floating barrier is completely closed by very thin strips of gold ribbon, placed vertically in the water, and soldered to the ends of the float and to brass pieces pressed tightly against the sides of the trough. This arrangement can be made leak-proof and very sensitive. In order to measure the force on this float, at a given position, fine silk fibres connect the float to (a) an optical lever system consisting of a mirror suitably damped with an oil bath, mounted on a light torsion wire, which is in effect a practically frictionless bearing, and (b) a fine torsion wire provided with an accurately graduated divided head, whose divisions can be calibrated in absolute measure by hanging weights on a small balance mounted on the wire. Full details of the apparatus are given at the end of the paper.