Tissue paper, nitrated

Pyroxylin was first prepd, in 1838, by Pelouze and later by other investigators who nitrated paper, linen cotton by the action of HNOa(Ref 44). Its piepn by nitrating tissue paper using mixed acid is described by Worden (Ref 7)... 

Rosslyn Powders. Several smokeless powders patented in Engl in 1894-1895. One was prepd by treating nitrated tissue paper with K or Ba nitrate, starch and vaseline, previously dissolved in some volatile material such as benz. The resulting sheet was cut into strips of desired size and dried... 

Mowbray (U.S.P., No. 443, 105, 3rd December 1890) says that a pure cotton tissue paper less than 1/500 inch in thickness, thin as it is, takes on a glutinous or colloid surface, and thus requires some thirty minutes to enable the nitration to take place. With a thicker paper only the surface would be nitrated. He therefore uses a fibre that has been saturated with a solution of nitrate of soda, and afterwards dried slowly, claiming that the salt crystallises in the fibre, or enters by the action termed osmose, and opens up the fibre to the action of the acid. This process would only be useful when the cotton is to be nitrated at a low temperature. At a high temperature it would be unnecessary. 

Determination in Biological Fluids and Tissues All the advances in pharmacokinetics and drug metabolism described in Sections 7 and 8 would not have been possible without the availability of the proper analytical methods. The following is a tabulation of publications in this field, most of which have already been discussed in Section 5. It should be mentioned that a few publications talk about aspirin blood levels, but really mean salicylate levels. The following tabulation covers only those papers where aspirin was differentiated from other salicylates by chromatography or other means. It seems that the "workhorse" for serum salicylate levels is still the colorimetric (ferric-nitrate) method of Brodie, Udenfriend and Coburn153 published in 1944, or modifications thereof. Simplified versions (cf. 206) may lead to erroneous results under certain conditions.207 The method is also applicable for urinary metabolites after proper hydrolysis (cf. 208). For other methods restricted to salicylic acid, see Section 5.61. 

The last-named authority has remarked with reference to British gum prepared by sulphuric acid, that it possesses the disadvantageous property of being deliquescent. This method is, therefore, never employed, as besides this, the products are often colored. He also states that when nitric arid is employed in the preparation of dextrin, it must be perfectly pwe. Commercial nitrio acid, as obtained by the action of oil of vitriol upon nitrats of Soda, always contains a small amount of chlorine and although this element is contained in diminished proportion in the dextrin, it is nevertheless sufficient to considerably lessen the brilliancy of the colors prepared with the dextrin. Several printers upon paper and vegetal tissues have observed this, but have been unable to account for it otherwise than by attributing it to the iaferior quality of the gum. 

In many general analytical studies, Sn has proven troublesome in many matrices, particularly in the presence of sulfate. We have found no trouble with STPF conditions (Pruszkowska et al., 1983c). There are few methodology papers on tin in specific biological fluids or tissues but the general procedures are very likely to work well. A dilution of blood or urine of 1 -f 3 in a solution of Pd as the nitrate will provide a detection limit of about 4j g/L in the sample using a 20-//L aliquot on the platform. 

PEG-2 stearate SE PPG-2 laurate PPG-2 oleate PPG-2 stearate PVM/MA copolymer Sodium p-styrenesulfonate Stearamidopropyl dimethyl-2-hydroxyethyl ammonium nitrate antistat, paper chemicais Diaikyi dimethyi ammonium chioride antistat, paper coatings Lauramine oxide antistat, paper tissue PEG stearate antistat, paper treatment Siiica, coiioidai antistat, PE... 

Voluminous reports (1) have appeared to elucidate the physiology and biochemistry of the Crassulacean Acid Metabolism (CAM). Nevertheless, its mechanism of regulation still continues to be a curiosity. Little information is available on nitrate (NO") assimilation in CAM tissues or on its coincidence or coordination with the other cycles which are characteristic of CAM, such as malate production in the dark. In the present paper we report a possible relationship between the efficiency of nitrate assimilation and CO2 fixation (malate production) in the CAM plant Kalanchoe pinnata. 

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