cover image: Journal of the Indian Chemical Society  November  1934

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20.500.12592/845627

Journal of the Indian Chemical Society November 1934

1934

dNAle C2iHsi \NMe 2788 S. SIDDIQUI AND R. H. SIDDIQUI (1) That one of the two tertiary amino groups in the conessine molecule corresponds in its intensity of reaction to the type of the pure aliphatic amines in so far as the monocyanamide is obtained in a quantitative yield immediately on bringing together the coponents in ethereal solution in the cold. [...] p. 955°) Apart from the decisive bearing of the present investigations on the general progress of work in the Holarrlunta alkaloids they afford a totally new orientation to studies in the molecule of conessine and various aspects of the problem are already being investigated by us. [...] (6'8 g.) of BrON in chloroform solution for an hour and the reaction mixture worked up in the general sense of the method given above 8'5 g. of cyanoisconessimine 0'8 g. of dicyanoconimine 8 g. of conessine dimethoxbromide and (on fractional crystallisation of the resi1ue from the mother liquors of the quarternary ammonium compound from ethyl acetate) 2'5 g. of conessine monohydrobrom [...] Since in the present experiments the strength"STUDIEIN THE COAGULATION OF COLLOIDS ' 801 of the As283 sol is twice as great as that of the Fe203 sol it is to be anticipated that coagulation would not be sensible unless the concentration of the former sol is reduced to half by dilution with water before mixing with the other colloid. [...] Thus defined coagulation corresponds to but an intermediate region in the series of changes limited on one extreme by the precipitation of the suspended material and on the other by the just incipient perhaps prcoalescence changes in the micelle initiated on the introduction of but traces of the coagulant.
technology medicine science
Pages
69
Published in
India
SARF Document ID
sarf.120026
Segment Pages Author Actions
Frontmatter
i-iv J. C. Ghosh, A. C. Sircar view
The Alkaloids of Holarrhena Antidysenterica. Part III. Studies in the Action of BrCN on Conessine and its N-Demethylation to ispConessimine and Conimine
787-796 Salimuzzaman Siddiqui, Rafat Siddiqui view
Studies in the Coagulation of Colloids. Part X. Viscosity Variations during Mutual Coagulations of Positive Ferric Oxide Sol and Colloid Arsenious Sulphide Manganese Dioxide and Antimony Sulphide
797-804 Shridhar Joshi, K. P. N. Pannikkar view
Thermionic Emission and Catalytic Activity. Part II. Thoria-Ceria Surfaces. A Contribution to the Theory of Welsbach Gas Mantle
805-810 B. S. Srikantan view
Attempts to Synthesise Uric Acid from Nine-membered Cycloids
811-822 P. C. Guha, M. N. Ramaswami view
The Condensation of Aldehydes with Malonic Acid in Presence of Organic Bases. Part I. In Presence of Pyridine alone
823-826 P. N. Kurien, K. C. Pandya, V. N. Surange view
3-Amino- and 3-Hydroxy-B-naphthapyrones
827-834 B. B. Dey, A. K. Lakshminarayanan view
Studies in the Cotarnine Series. Part I. Action of Phenyl isoCyanate and Phenyl isoThiocyanate on Cotarnine
835-842 B. B. Dey, P. Lakshmi Kantam view
Parachor and Chemical Constitution. Part I. Structure of the Carbohydrates
843-848 Susil Ray view
Review
849-849 N. R. D. view
Backmatter
i-ii unknown view

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