W ashing

The toluene solution from the previous step was treated with an ethanol solution of NaOEt (0.1 mol in 100 ml) at O C. When about a quarter of the solution had been added a thick precipitate formed and ether (100 ml) was added to maintain a fluid slurry. The remainder of the NaOEt was added and the slurry was stirred overnight. The solid was collected and w ashed with ether. It was then mixed with ether (200 ml) and 2NHC1 (75 ml) and shaken in a separatory funnel until the solid dissolved. The ether layer was washed with 2NHHC1 (2 X 50ml) and water and dried over MgS04. The solution was decolorized with Magnesol and evaporated to give the a-nitro ester as a red oil. 

To determine Ks we need to know the average mass of the cereal samples and the relative standard deviation for the %(w/w) ash. The average mass of the five cereal samples is 1.0007 g. The average %(w/w) ash and the absolute standard deviation are, respectively, 1.298% and 0.03194. The percent relative standard deviation, therefore, is... 

Thermal Phase Inversion Thermal phase inversion is a technique wFich rnav be used to produce large quantities of MF membrane econornicallv, A solution of polvrner in poor solvent is prepared at an elevated temperature. After being formed into its final shape, a sudden drop in solution temperature causes the polvrner to precipitate, The solvent is then w ashed out. Membranes rnavbe spun at high rates using this technique. 

It is interesting that NASA in their review of WASH-1400 Draft (included in W.ASH-1400 Final Appendix II), indicated that they had discontinued the use of fault tree analysis in fas or of the FMEA. 

Clean in place (CIP) A system used in clean rooms, consisting of tanks, piping, pumps, and associated controls for the distribution of w ash and rinse solutions. 

Some customers complained that there was oxygen in the ammonia. It was found that the road transport maintenance department was preparing tanks for repair by w ashing them out with water and then returning them... 

The ether is then decanted from the crystals, wdiich are drained at the filter-pump, w ashed wfith a little ether, and finally diied in (he air on filter-paper. Yield of aldehyde-ammonia, 25—30 grams. It may be used for the reactions described on p. 67. 

Institute of Medicine, Veterans and Agent Orange Update 1998 (W ash-ington, D.C. National Academy Press, 1999). 

Bioinformatics and biotechnology law resources have been compiled to deal with this other side of research in some useful sites, e.g., University of W ashing-ton School of Law site (http //lib.law.washington.edu/ref/biotech.htm) and a commercial site (http //www.denniskennedy.com/bioinformaticslaw.htm). 

Thioguanine (100 g, 0.6 mol) was added portionwise to 12 M HCl (1 L) cooled to 0 C with a dry ice bath. When chlorine was introduced to the stirred bright yellow suspension, the temperature quickly rose to 15 °C. However, during the 45 min reaction time, the temperature was maintained at 0-10°C. The color of the reaction changed from bright yellow to beige. The product was removed by fdtration and the filter cake dissolved in H,0 (1 I,) containing NaOH (60 g, 1.5 mol). The pH was adjusted to 6 with 6 M HCl and the product was isolated by filtration. It was necessary to W ash the product several times with H O to remove the trapped NaCl. The white solid was dried in a vacuum oven at 80°C yield 77 g (76%) mp > 275 C. 

Yu and Halperin (162) observed a -Pt surface resonance from platinum particles initially prepared on silica gel the carrier was removed afterwards with a solution of sodium hydroxide, thus forming a self-supported pow -der sample. Its average particle diameter determined by TEM was 4 nm assuming a log-normal distribution, this corresponds to a dispersion of 0.31. The NMR samples w ere extensively w ashed with, water, dried, and left exposed to the atmosphere. A signal detected at 1.089 G/kHz w as attributed... 

The blue oxide is best obtained by allowing powdered molybdenum to remain for a long time at ordinary temperatures in contact with an aqueous suspension of the trioxide, filtering, and then digesting with a further quantity of molybdenum. The solution is evaporated in vacuo. Cold water used for washing the solid should previously be rendered air-free. Another good method of preparation consists in precipitating in the cold, by means of excess of a solution of hydrated molybdenum tetrachloride, a solution of ammonium molybdate in hydrochloric acid the precipitate is w ashed with air-free w ater in an atmosphere of carbon dioxide, and is dried m vacuo. 

According to Aloy, a black crystalline hydrate, of composition UO2.2H2O, is obtained when crystallised uranous sulphate is treated with hot potassium or sodium hydroxide solution. The product, when thoroughly w ashed, remains stable in air for several days. It dissolves in dilute acids, yielding uranous salts. On heating, it is completely converted to the green oxide. 

C., in an atmosphere of nitrogen, for four to five hours. The product, 1 66 grams or 70 per cent, yield, is well w ashed and dried in vacuo. It is a lemon-yellow powder, sintering at about 180 C. and melting at 194 C., soluble in acetone, phenol, benzaldehyde, or pjTidine. 

Its expl props were not investigated (Refs 2 5) Cupric Perchlorates. No anhyd salt was prepd, but its hepta-, hex a-, tetra- and di-hydrates are known (Ref 5). The most common seems to be hexa-hydrate, Cu(CI0 ).6H20. It was first prepd in 1831 by Serullas by heating CuO with perchloric acid. Portillo Alberola prepd it in 1930 (Ref 3) by treating Cu carbonate with 30% perchloric acid. The ppt, W ashed with ale ether and dried in vacuum over PjOg, was It blue in color, mp 82° and decomposed at 120° (See also Refs 4 5) According to Ellern (Ref 6), a match can be produced which uses Cu (or Sr) perchlorate dissolved in triethanolamine and combined with cellulose acetate - with the regular matchheads affixed... 

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