Hydrolysis of sodium carbonate

1970 ◽  
Vol 47 (1) ◽  
pp. 67 ◽  
Author(s):  
F. S. Nakayama
Keyword(s):  
Sodium Carbonate ◽  
Hydrolysis Of

The synthesis of Cyclododecane-r-1,c-5,c-9-triamine and r-1,c-5,c-9-Tris(2,3-dimethoxybenzamido)cyclododecane

1975 ◽  
Vol 28 (3) ◽  
pp. 673 ◽  
Author(s):  
DJ Collins ◽  
C Lewis ◽  
JM Swan
Keyword(s):  
Aqueous Solution ◽  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Sodium Carbonate ◽  
Sodium Azide ◽  
Room Temperature ◽  
Dimethyl Formamide ◽  
Lithium Aluminium Hydride ◽  
Lithium Aluminium ◽  
Hydrolysis Of

Treatment of cyclododecane-r-1,c-5,c-9-triyl tris(p-toluenesulphonate) with sodium azide in dimethyl-formamide at 100� for 6 h gave the corresponding cis,cis-triazide which upon hydrogenation or reduction with lithium aluminium hydride gave cyclododecane-r-1,c-5,c-9-triamine, isolated as the tris-salicylidene derivative. Acid hydrolysis of this, removal of the salicylaldehyde, and treatment of the aqueous solution with sodium carbonate and 2,3-dimethoxybenzoyl chloride gave r-1,c-5,c- 9-tris(2,3-dimethoxybenzamido)cyclododecane. ��� Treatment of (E,E,E)-cyclododeca-1,5,9-triene with an excess of acetonitrile and sulphuric acid at room temperature for three days gave 18% of (E,E)-1-acetamidocyclododeca-4,8-diene; no di- or tri-amides were isolated.

scholarly journals THE HYDROLYSIS OF SODIUM CARBONATE IN SOLUTION.

1915 ◽  
Vol 37 (10) ◽  
pp. 2268-2273 ◽  
Author(s):  
Francis C. Frary ◽  
Adolph H. Nietz
Keyword(s):  
Sodium Carbonate ◽  
Hydrolysis Of

scholarly journals Phosphatidylinositol-specific phospholipase C of Bacillus thuringiensis as a probe for the distribution of phosphatidylinositol in hepatocyte membranes

1989 ◽  
Vol 259 (3) ◽  
pp. 913-916 ◽  
Author(s):  
J A Higgins ◽  
B W Hitchin ◽  
M G Low
Keyword(s):  
Endoplasmic Reticulum ◽  
Bacillus Thuringiensis ◽  
Phospholipase C ◽  
Sodium Carbonate ◽  
Plasma Membranes ◽  
Secretory Proteins ◽  
Membrane Phospholipids ◽  
Golgi Membranes ◽  
Liver Membranes ◽  
Hydrolysis Of

Phosphatidylinositol-specific phospholipase C (PI-PLC) produced by Bacillus thuringiensis has been used as a probe for the distribution of phosphatidylinositol in hepatocyte membranes. Approx. 50% of this phospholipid was hydrolysed in microsomal vesicles (endoplasmic reticulum) with no significant hydrolysis of the remaining membrane phospholipids. Latency of mannose-6-phosphatase was retained during treatment indicating that the vesicles remained impermeable. Stripping of the ribosomes did not increase hydrolysis of phosphatidylinositol; however, when the vesicles were opened using dilute sodium carbonate, hydrolysis increased to greater than 90%. Hydrolysis of phosphatidylinositol of Golgi membranes was 35% and of plasma membranes was 50%. After treatment with PI-PLC, radiolabelled secretory proteins were retained in Golgi membranes and trapped lactate dehydrogenase was retained in plasma-membrane preparations indicating that the vesicles remained closed. Hydrolysis of phosphatidylinositol increased to greater than 90% when the membranes were opened by treatment with dilute sodium carbonate. These observations indicate that PI-PLC of Bacillus thuringiensis is a suitable probe for the distribution of phosphatidylinositol in membranes, and that in liver membranes this phospholipid occurs on each side of the bilayer, a topography consistent with its diverse roles.

Hydrolysis of polyacrylonitrile in aqueous solution of sodium carbonate

2012 ◽  
Vol 54 (3-4) ◽  
pp. 161-166 ◽  
Author(s):  
V. A. Dyatlov ◽  
T. A. Grebeneva ◽  
I. R. Rustamov ◽  
A. A. Koledenkov ◽  
N. V. Kolotilova ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sodium Carbonate ◽  
Hydrolysis Of

THE POTENTIOMETRIC TITRATION OF CARBONATE SOLUTIONS CONTAINING URANIUM

1953 ◽  
Vol 31 (8) ◽  
pp. 705-709 ◽  
Author(s):  
J. Halpern
Keyword(s):  
Hydrochloric Acid ◽  
Potentiometric Titration ◽  
Sodium Carbonate ◽  
Uranyl Nitrate ◽  
Carbonic Acid ◽  
Potentiometric Titrations ◽  
End Point ◽  
Carbonate Solutions ◽  
Hydrolysis Of ◽  
Complex Ion

Potentiometric titrations with hydrochloric acid were carried out on standard sodium carbonate solutions containing varying amounts of uranyl nitrate. The results confirmed the fact that uranium is present in such solutions as the complex ion [Formula: see text]. It was found that only the free CO3−− is titrated with H+ up to the first end point at pH = 8. 2. The complex ion is very stable and is decomposed only on further addition of acid when the complexed CO3−− along with the HCO3− in the solution is converted to carbonic acid before the second end point. The pH at which the second end point occurs is lowered from its normal value of 4.0 in the presence of uranium. This effect is attributed to hydrolysis of the UO2++ ion. The necessary corrections for determining carbonate and bicarbonate in the presence of uranium are given.

Synergy of lignocelluloses pretreatment by sodium carbonate and bacterium to enhance enzymatic hydrolysis of rice straw

2018 ◽  
Vol 249 ◽  
pp. 154-160 ◽  
Author(s):  
Zhanhui Shen ◽  
Kejing Zhang ◽  
Mengying Si ◽  
Mingren Liu ◽  
Shengnan Zhuo ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Rice Straw ◽  
Sodium Carbonate ◽  
Hydrolysis Of

scholarly journals Physicochemical Investigations of Scheelite Concentrate Decomposition

2015 ◽  
Vol 17 (3) ◽  
pp. 209 ◽  
Author(s):  
G. Yar-Mukhamedova ◽  
А. Darisheva ◽  
K. Kasimzhanov ◽  
D. Babazhanov ◽  
B. Barkitova
Keyword(s):  
Sodium Carbonate ◽  
Kinetic Studies ◽  
Adsorbed Water ◽  
Oxide Surface ◽  
Scheelite Concentrate ◽  
Carbonate Decomposition ◽  
Kinetic Mode ◽  
Oxide Ions ◽  
Hydrolysis Of ◽  
Carbonate Leaching

<p>In the article results of kinetic studies of autoclave-carbonate decomposition of scheelite concentrates are presented. Studies are carried out in temperature range of 368–523 K, at mixing with a speed of 100–400 revolutions per minute. Solutions of sodium carbonate, mol/ dm<sup>3</sup>: 0.5, 0.75, 1.0, 1.25, 1.5, 2.0 was used to determine the dependence of the degree of tungsten leaching from scheelite on concentration. It was established, that with increase of concentration of sodium carbonate leaching degree increases and at the concentration of 1.5–2.0 mol/dm<sup>3</sup> it is reached rapid, within 45–60 min, 80−90% of leaching, and the almost complete  leaching of tungsten (95.2–99.3%) achieved in 2 h. For interaction of WO<sub>3</sub> with Na<sub>2</sub>CO<sub>3</sub> solution it was obtained the kinetic mode. In this case there is practically no concentration gradient of sodium carbonate at an oxide surface. It is obvious, that increase of the hydrolysis takes place due to the fact that to oxides reaction with a reagent-solvent precedes hydration of their surface. In the adsorbed water molecules due to their interaction with the oxide surface intramolecular bonds are weakened, thereby hydrolysis of<br /> oxide ions coming to the hydrated surface flows more fully.</p>

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