Journal of the American Chemical Society, Volume 24American Chemical Society, 1902 - Chemistry Features definitive articles and communications, as well as book and software reviews, covering all areas of chemistry. |
From inside the book
Results 1-5 of 54
Page 4
... fractions of the former alkaloid melted from 130 ° -134 ° and of the latter from 197 ° -200 ° , both of course in the unpurified . state . By a continuous repetition of the above process of dissolving in acetic acid , precipitating with ...
... fractions of the former alkaloid melted from 130 ° -134 ° and of the latter from 197 ° -200 ° , both of course in the unpurified . state . By a continuous repetition of the above process of dissolving in acetic acid , precipitating with ...
Page 9
... fraction that had been standing in methyl alcohol for several days had changed to fine silky needles but we were not ... fractions recrystallized from the same solvents several times but with loss of considerable material . Enough was ...
... fraction that had been standing in methyl alcohol for several days had changed to fine silky needles but we were not ... fractions recrystallized from the same solvents several times but with loss of considerable material . Enough was ...
Page 10
... fractions of the needles melting in the neighborhood of 200 ° were united and purified in the same manner employed with chelidonine . A pure product was obtained that possessed the constant melting - point of 202 ° ( un- corr . ) . This ...
... fractions of the needles melting in the neighborhood of 200 ° were united and purified in the same manner employed with chelidonine . A pure product was obtained that possessed the constant melting - point of 202 ° ( un- corr . ) . This ...
Page 13
... fractions in an almost uncontaminated condition . Small white warts , and colorless transparent prisms were about equally abundant in these fractions . Protopine was at once suspected , and from the melting - point of 203 ° in the ...
... fractions in an almost uncontaminated condition . Small white warts , and colorless transparent prisms were about equally abundant in these fractions . Protopine was at once suspected , and from the melting - point of 203 ° in the ...
Page 14
... fractions of chelidonine and this alkaloid were dissolved in acetic acid , diluted with water , placed in a separator , made alkaline with ammonia and shaken out with ether . After filtering into a flask , close watch was kept of the ...
... fractions of chelidonine and this alkaloid were dissolved in acetic acid , diluted with water , placed in a separator , made alkaline with ammonia and shaken out with ether . After filtering into a flask , close watch was kept of the ...
Contents
466 | |
475 | |
488 | |
488 | |
596 | |
667 | |
680 | |
691 | |
116 | |
117 | |
138 | |
167 | |
186 | |
196 | |
200 | |
226 | |
227 | |
235 | |
243 | |
253 | |
266 | |
273 | |
294 | |
296 | |
296 | |
327 | |
346 | |
354 | |
360 | |
374 | |
388 | |
392 | |
398 | |
400 | |
435 | |
448 | |
457 | |
698 | |
699 | |
708 | |
719 | |
735 | |
743 | |
744 | |
754 | |
764 | |
771 | |
778 | |
784 | |
784 | |
785 | |
823 | |
848 | |
864 | |
882 | |
893 | |
895 | |
900 | |
900 | |
1030 | |
1128 | |
1136 | |
1140 | |
1206 | |
Other editions - View all
Common terms and phrases
acid solution action added alcohol addition-product alkaline alkaloid alloys alumina aluminum ammonia ammonium amount amyl alcohol analysis anethol antimony apparatus aqua atomic weight barium hydroxide benzene boiling brucine brucine hydrochloride cadmium calculated carbon dioxide cent Chem chemical chemistry color compound concentrated containing crystals determined dibromide dilute dissolved distilled earths edestin erbium ether ethyl alcohol evaporated excess experiments filtered filtrate flask formed fraction gram gram gave gram silver bromide heat hydrochloric acid hydrogen inhibitive insoluble iodide iodine iron laboratory liquid melting metal method methyl mixture molar molecules neutral nitrate nitric acid nitrogen normal obtained oxalate oxide oxygen phosphate platinum portion potash potassium hydroxide precipitate prepared Pres protein pure quantity reaction reagent residue salt sample Section separated silica silver bromide sodium chloride soil soluble solvent substance sulphate sulphide sulphuric acid TABLE tellurium temperature terbia thiocyanate thorium tion tube washed yttria ΙΟ