Sulfochromate

At no time subsequent to the original filling was an air/liquid meniscus allowed to enter the capillary. Protein was removed from the surface of the measuring bulb by inverting and treating the measuring bulb surface with sulfochromic acid for 30 min. Details are as given previously (3). 

The results for Albumin are shown in Figure 1. Times of flow were measured at 15°C 0.01°C. It is seen that the surface treatment with sulfochromic acid had only a small effect on the time of flow. On the other hand we have the surprising result that layer thickness increases in direct proportion to albumin concentration up to the highest concentration (15% w/w) which was tested. This is true both at pH 4.0 and pH 7.0 with approximately the same slope. Layers which are very thick result. 

Oxidation to sulfoxide occurs with fuming nitric acid, whereas the sulfone is formed in sulfochromic acid ... 

Both lead chromate and lead sulfochromate (the latter is a mixed-phase pigment) can be orthorhombic or monoclinic the monoclinic structure is the more stable [3.132], The greenish yellow orthorhombic modification of lead chromate is metastable at room temperature, and is readily transformed to the monoclinic modification under certain conditions (e.g., concentration, pH, temperature). The latter modification occurs naturally as crocoite. 

Production. In large-scale production, lead or lead oxide is reacted with nitric acid to give lead nitrate solutions, which are then mixed with sodium dichromate solution. If the precipitation solutions contain sulfate, lead sulfochromate is formed as a mixed-phase pigment. After stabilization the pigment is filtered off, washed until free of electrolyte, dried, and ground. 

Ten Horn describes a process for the production of lead sulfochromate containing at least 50 % lead chromate [3.139]. This has a low acid-soluble lead content (< 5 % expressed as PbO, by BS 3900, Part B3, 1965). 

We studied samples of La lecithin with 16-29% water at room temperature. The samples were prepared between two microscope glass slides that were first treated with a sulfochromic solution, then carefully rinsed with distilled water and dried. They were observed by transmission polarizing microscopy. Just after deposition between the slides, the samples present a highly disordered texture which strongly diffuses light. After compression (squeezing) and/or shearing parallel to the plates, one obtains an overall homeotropic orientation that is perturbed by defects. The thickness of the samples is in the order of 20/. ... 

D 2674 Methods of Analysis of Sulfochromate Etch Solution Used in Surface... 

Both lead chromate and lead sulfochromate (the latter is a mixed-phase pigment) can be orthorhombic or monoclinic the monoclinic structure is the more stable... 

ISO 14235 1998 Soil quality - Determination of organic carbon by sulfochromic oxidation. 

The cleaning procedure of PTFE and PE wafers was as follows the surfaces were rinsed with alcohol and water, then the substrates were soaked in a sulfochromic acid from 30 to 60 minutes at the temperature 50°C. The surfaces then were washed with distilled water and dried with a strong jet of nitrogen. The equilibrium macroscopic contact angles obtained were 105° and 90° for PTFE and PE substrates, respectively (for pure water droplets). 

ASTM D2674-72 (1998) Standard methods of analysis of sulfochromate etch solution used in surface preparation of aluminum. 

Figure 4. Breaking strength of joint shown for various treatments of polyethylene, ("sulfochromate" is oommon glass cleaning solution). Adapted from Reference 26.

Jurin s law describes the spontaneous ascent of a liquid up a fine capillary tube (radius R < n ) (see Fig. 1.10). Dip the end of an extremely clean glass capillary tube (cleaned with sulfochromic acid) into water. The water will rise up to a height h and, as the water totally wets the glass, the meniscus will be hemispherical. The pressure at point A, just inside the liquid, can be calculated using Laplace s formula. If Pq is the outside pressure, then... 

Preparation of Metal Surfaces for Adhesive Bonding, Practice fo- (D 2651) Analysis of Sulfochromate Etch Solution Used in Surface Preparation of Aluminum, Methods of (D 2674)... 

Repeated cycles of 30 s exposures to 50 °C sulfochromic acid, 3% aqueous HP and extensive rinsing. After three such cycles, transfer to the self-assembly solution [48]. This method also removes Cr, which may diffuse to the surface from the adhesion layer. 

Lanosterol prepared from the labeled squalene mixture, was degraded to acetate by Kuhn-Roth oxidation (sulfochromic treatment) and in turn, the acetate was degraded to ethylene for mass spectrometric analysis. Consideration of the labeling patterns reveals that only structure D can give rise to ethylene containing at both carbon atoms. Since such doubly labeled ethylene was actually detected, it was concluded that the process of two 1,2-methyl migrations actually occurs. 

Primrose chrome (greenish-yellow lead sulfochromate)... 

Strictly, the name Sulfochrome applies to the diammonium salt. 

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