Alcohol wash

The catalyst is removed by filtration, using an absolute alcohol wash, and the clear filtrate is concentrated under reduced pressure at a temperature below 50" (water bath). As diethyl amino-malonate is not so stable as its salts, the crude ])roduct is con-... 

This formula was confirmed hy Haworth and Perkin s synthesis of a-flZZocryptopine from herherine, the first application of a process, of which examples have heen given already in the syntheses of cryptopine (p. 298) and protopine (p. 301) hy the same authors. Anhydrotetrahydromethyl-herherine (I cf. hase (a), p. 346) in dry chloroform was added to a solution of perhenzoic acid in ether cooled helow 5°. The amine oxide, C21H23O5N (II), separated as an oil, which after shaking with sodium hydroxide solution, solidified and was crystallised from water in slender prisms, m.p. 135°. It was dissolved in acetic acid, hydrochloric acid added, the mixture heated in boiling water for an hour and the hase precipitated hy addition of potassium hydroxide. The precipitate was dissolved in methyl alcohol, ether added, the alcohol washed out with water and the ethereal... 

Extraction of total xanthophyll esters from marigold in hydrocarbon solvent, removal of impurities and cis-isomers by alcohol washing and concentration of trans-esters... 

If the stain appears washed out, it is likely that the slide was destained too much. This washed-out appearance can be either because the specimen was left too long in the acid-alcohol destain or because the alcohol wash after the acid-alcohol destain had become acidic as a result of transfer by previous slides. 

Molybdenum doped catalyses which presented the highest citronellol selectivity in cyclohexane (ref. 3) have Deen prepared as described previously (ref. 1), except that additional alcohol washings were substituted to the four water washings. The catalysts prepared without water washings will De referred to as "Un-water-Washed UW"... 

The term folded oils refers to concentrated oils. This typically involves a distillation process however, alcohol washing can also be used. Alcohol washing is based on the insolubility of d-limonene in 60% to 70% ethanol. These processes predominately remove terpene compounds, although aldehydes (octanal) are also reduced. Oils that are more than 20-fold concentrated are called terpeneless oils and are more stable. Distillation is predominately used by flavor houses. Flavor houses purchase cold-pressed oil, which is concentrated and fractionated. These fractionated portions are sold for flavorings or flavor precursors. 

The alcoholic washings contain much colored matter, and must not be added to the mother liquors. 

For initiation use also alcohol washing of the whole body. 

These results are in striking contrast to those obtained with the hair from heroin users (Figure 3). Essentially perfect plateau wash kinetics were obtained for 6-MAM, morphine, and codeine. Most important, the amounts of 6-MAM released from the inaccessible domain by digestion easily meets the R sz criterion of heroin use. It should also be mentioned that had the alcohol washes been continued, then the alcohol wash kinetics would have been similar to curve AB in Figure 1. 

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