Rose formula

Calculation of the plate number with the aid of the fractionating factor and the Rose formulae... 

Felix Cola s milestone work Le Livre de Parfumeur (1931, p. 192) recorded a white rose formula containing only 1% of rose oil, 2% of rose absolute, 7.5% of other oils, and aroma chemicals. 

Geraniol is a colourless liquid of sweet odour, recalling that of the rose, principally, and to a lesser extent the pelargonium. It is an open-chain alcohol, having one of the two following constitutional formulae -t-... 

There seems, however, to-day, to be overwhelming evidence that the French chemists were correct and that citronellol and rhodinol are two very similar, but chemically different, compounds, citronellol being represented by the formula (1) and rhodinol by formula (2). Considerable evidence of this is to be found in the work of Barbier and Locquin. Starting from the acetic esters of ordinary d-citronellol and rhodinol from oil of geranium or rose, they attached hydrogen chloride to the double bond, and obtained the same additive product according to the equations — ... 

Methyl-heptenol is an alcohol with a delicate rose odour, of the formula CgHjgO. It occurs in Mexican and Cayeme linaloe oil, and is-prepared by reducing methyl-heptenone, and has the following characters —... 

This alcohol, of the formula CjoHj O, occurs in the essential oil Bupleurum fi-uticomni, from which it was isolated hy Francesconi and Semagiottod It was separated hy means of its phthalic acid ester, and is an oil of faint rose odour, having the following characters —... 

To 10 c.c. of the oil (otto of rose or rose-geranium oil) 10 c.c. of formic acid 100 per cent, (specific gravity 1 22) is added, and the mixture gently boiled under a reflux condenser for one hour. The mixture is cooled, 100 c.c. of water added, and the whole transferred to a separator. The aqueous layer is rejected, and the oil washed with successive quantities of water as in the acetylation process. The formylated oil is dried with anhydrous sodium sulphate, and about 2 grams neutralised and saponified with alcoholic potash in the usual manner. The percentage of citronellol is then calculated from the following formula —... 

The coefficients 0 are variously called angular momentum addition coefficients, or Wigner coefficients, or Clebsch-Gordan coefficients. Their importance for quantum mechanics was" first recognized by Wigner,6 who also provided a formula and a complete theory of them. The notation varies among different authors who deal with them7 ours follows most closely that of Rose. 

Firms that were unable to meet the requirements of the 4+2 formula dramatically increased their chances of failure and the differences in financial performance among these firms were remarkable. Winners produced total returns to shareholders (TRS) of 945% over the ten-year period of the study, whereas Tosers were only able to grow TRS 62%. Sales rose 415% for Winners, but only 83% for Losers. Similar results held for operating income. 

Pseudovinblastinediol (21) (formerly named pseudovincaleukoblas-tinediol) has been isolated from C. rose us as a minor constituent (44). The high-resolution mass spectrum of 21 established a molecular formula of C44H5ftN40g. The characteristic vindoline fragments of miz 469 and 282 were shifted 58 mass units to miz 411 and 224, respectively, indicating the... 

Rg. 12J>1 Cryptate derived from boron atoms form apexes on lower left and upper right coordinate positions on the octahedron are occupied by nitrogen atoms. The heavier foes represent edges of the polyhedron spanned by chelate rings. [From Boston. D. R. Rose, N. J. J. Am. Cliem. Soc. 1968, 90,6860. Reproduced with permission.]... 

From a consideration of the composition of the halides, and because of the supposed isomorphism of tantalic acid and stannic acid, Rose gave the formulas NbOa and TaOs to anhydrous niobic acid and tantalic acid respectively, but in so doing he repeated an error that had previously been made by Berzelius with regard to vanadium compounds, and overlooked the presence in the halides of an oxygen atom (see p. 24). Blomstrand 8... 

Marignac 3 also showed that previous methods for the separation of niobium and tantalum were far from perfect, and for the first time he succeeded in preparing pure niobium and tantalum compounds. His methods are still in use to some extent, and his analyses provided the first reliable values for the atomic weights of these elements. It should be stated, too, that Rose s earlier researches, which extended over a period of nearly twenty years, have provided a valuable source of information for the chemistry of niobium and tantalum.4 His calculations and formulae were revised by Rammelsberg 5 in the light of subsequent discoveries. 

Niobium Oxytrichloride, NbOCls.—This compound is of historical interest in that it was one of the oxy-halogen compounds prepared originally by Rose in which the oxygen atom was overlooked. Rose called this substance hyponiobium chloride its correct formula, and hence the true valency of niobium, were first established by Blomstrand.4... 

For the determination of vitamin E in seed oils by HPLC, the oils can simply be dissolved in hexane and analyzed directly. Solid-food samples demand a more rigorous method of solvent extraction. In a modified Rose-Gottlieb method to extract vitamin E from infant formulas (86), dipotassium oxalate solution (35% w/v) was substituted for ammonia to avoid alkalizing the medium, and methyl tert-butyl ether was substituted for diethyl ether because of its stability against the formation of peroxides. 

The chemical properties Of phosphine.—H. Davy10 analyzed the gas, but his sample must have been mixed with so much hydrogen as to render his result useless for determining the composition of the gas. The analyses of H. Rose, J. B. A. Dumas, and U. J. J. Leverrier agree with the empirical formula PH3 and the vapour density determinations previously indicated show that this is also the mol. formula. A. O. Rankine discussed the structure of the molecules of the family of trihydrides H. Remy, and H. Henstock, the electronic structure and G. W. F. Holroyd gave... 

The analyses of H. Rose agree with the formula just assigned to phosphonium iodide, namely, PH4I. According to J. L. Gay Lussac, and J. J. Houton de la Billarbiere, the clear, transparent crystals are cubic, while H. Rose described them... 

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