Solution Technique for the Analysis of Silicates.

Abstract

These data seem to demonstrate that the LDH activity is much more stable when entrapped in the acrylamide gel than in free solution. Other interpretations, however, are possible. The rabbit muscle enzyme used in the preparation of the enzyme gel was composed of more than a single isoenzyme of LDH. On an electrophoretic separation as previously described ( 12), it was demonstrated that the preparation was primarily the slowest moving, less stable M-type isoenzyme ( 8), but a small amount of a faster migrating, more stable H-type isoenzyme (8) was also present.

The potassium paradox: Implications for soil fertility, crop production and human health

“…The dynamic nature of soil K is no less relevant in refuting the central assumption implicit to soil K testing, namely, that plant K availability 7 The potassium paradox is directly related to exchangeable K in the surface soil. Table 2 leaves no doubt that plant K uptake must originate from other sources, and is consistent with previous evidence that soil K reserves contribute considerable quantities of plant-available K 10,11,20,75,78,[81][82][83] (see also supplemental references [14][15][16][17][18][19][20][21][22][23][24][25][26] for the online version of the paper).…”

“…224 (23) 1120 (50) 700 (56) 476 (8) 336 (32) 379 (21) 267 (8) 3278 ND 1989 276 (25) 987 (24) 627 (35) 448 (16) 358 (14) 299 (29) 269 (16) * , ** , ***Significant at α = 0.05, 0.01 and 0.001, respectively; ns, not significant. 1 A complete listing of all studies surveyed can be found in Table S4, for the online version of the paper.…”

Some Colloidal Properties of Beidellite: Comparison with Low and High Charge Montmorillonites

“…Total elemental analysis of the beidellite and Otay clays were performed by ICP-AES after lithium metaborate digestions (Suhr and Ingamells, 1966). The non-hydrated halloysite component of the beidellite sample was quantified by selective dissolution analysis .…”

Petrogenetic modeling of a potential uranium source rock, Granite Mountains, Wyoming

“…Major-element concentrations were determined by the single-solution technique (Shapiro and Brannock, 1962;Suhr and Ingamells, 1966). Stated accuracies in terms of the amount present are: ±1 percent for SiO2, ±2 percent for A12O3 and ±1-10 percent for the remaining major oxides (those reported in terms of weight percent, tables 1, 2, and 3) depending upon the amount present.…”