formed together with

2010-12-4 13:52:53 1443

0 本帖最后由 eehome 于 2013-1-5 10:06 编辑 times New="New" Roman'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">of acids, I obtained, as mentioned above, bodies having the same external appearance and general properties, but varying Moncler , Moncler jacket, Moncler K2 vest black, Moncler K2 vest Pink in composition. The latter corresponded on one occasion with the formula Cu H7N04; on another occasion the analysis led to the formula Cm H13 NO1a. Now, on calculating the composition of a mixture of equal parts of the two bodies having respectively these formulae, it will be found to agree tolerably well with the mean of the Moncler jackets, Moncler Multiple K2 Vest Beige two first analyses given by Scherer, as will be seen on comparing his numbers with the calculated composition according to the formula CJ2 II2a Na Ou=Cu IL N04 + C,a H? NO,, Calculation. Scherer. C 60-S7 61-37 H 5-31 6-10 N 6-76 7-03 O 2706 25-50 100-00 100-00 It does not appear that Scherer took the precaution of treating his product with alcohol, in order to separate the easily solub Moncler jackets for men, Moncler Alpin, Moncler Angers, Moncler Bady le resinous matter which is always formed together with the pulverulent body when the extractive matters are decomposed by acids. Unless this precaution is taken, the product is sure to contain more than one substance, and its analysis must give very discordant results. On one occasion Scherer obtained by the direct action of hydrochloric acid on urine a dark-blue powder, which when dry assumed a coppery lustre like indigo, and must, indeed, have been indigo-blue itself. The formation of a blu Moncler Branson Jacket ，Moncler Branson Navy , Moncler Bea colouring-matter by the action of acids on some constituent of urine had been observed by Heller only a short time previously. Neither of these chemists, however, was aware of its true character, which was not discovered until long afterwards. Harley * succeeded in separating Scherer's colouring-matter into several substances, to only one of which, in his opinion, the colour of ordinary urine is to be attrib Moncler down jackets, Moncler Multiple K2 Vest Black uted. This, according to his description, is a resinous, amorphous body of a fine red or brownish-red colour, insoluble in water, but easily soluble in alcohol, ether, and caustic alkalies, to which he gave the name of urohevmatine. On being incinerated it leaves a little oxide of iron, and hence Harley infers that it is allied to the hoematine of blood, of which it is perhaps only a modification. By a process similar to that cmployed by Harley, Marcet f ob Moncler jackets women, Moncler Boutique tained from urine a resinous rose-coloured * Journal fur praktische Chemie, B. lxiv. S. 2(54. t Bibl. Univ. do Geneve, 18o2. p. 144. substance, haviug an acid reaction, insoluble in water, but soluble in alcohol, and which he supposed must exist in the secretion in a free state. I have no doubt, however, that this an 0
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