Glutinic acid

G. Gustavson, N. Demjanov,/. Prakt. Chem. 1888, 38, 201-207 in fact, the first allene to be synthesized was allene-1,3-dicarboxylic acid (glutinic acid B. S. Burton, H. v. Pech-man, Ber. Dtsch. Chem. Ces. 1887, 20,145-149), but its structure was only correctly assigned 67years later E. R. H. Jones,... 

These molecules have a C2 axis when a = c b = d, as exemplified by the chiral allene derivative )-glutinic acid (diagram XXXIV) [33]. 

PhenyIsuccinic acid, A50.12, A"1 Glutinic acid cyclopentadiene adduct, X3.2... 

The first allenic dicarboxylic acid, named glutinic acid (2,3-pentadienedioic acid) was isolated from Alnus glutinosa (Betulaceae). 

Glutinic acid, X3 Glyceraldehyde, A1 Glyceric acid, A1 Glycerol, Cl... 

Some like casein, salt free globulin and acid albumin are not heavily solvated in solution and are thus readily precipitated at the isoelectric point in a manner similar to the suspensions already considered. Others, e.g. glutin, gelatine and natural albumin, are solvated like silica which at the isoelectric point are not necessarily precipitated being maintained in the sol form by the solvent. On removal of the stabilising water however by the addition of alcohol or neutral salts precipitation will occur and this most readily at the isoelectric point. 

Alnus japonica (Thunb.) Steudel A. japonica (Thunb.) Steudel var. koreana Callier Ce Yan (Japanese alder) (leaf, bark) Alpha-amyrin, betulinic acid, glutin-5-en-3-ol, heptacosane, lupenone, taraxerol.48-50 Antitumor. 

Note Al=fine flake aluminium, GRS= glutinous rice starch, AA=acetic acid, BA=boric acid, GA=gura arabic... 

Gelatin and animal glues (glutines) are extracted from waste bones and hides [30.10, 30.11], Type A gelatin is produced by an acid extraction, while Type B uses an alkali — usually slaked lime. Demineralised bone (ossein) and cattle hide pieces are soaked in lime water at ambient temperature for up to 20 weeks. Additional milk of lime is added to the liquor to maintain the alkalinity. 

Mowbray (U.S.P., No. 443, 105, 3rd December 1890) says that a pure cotton tissue paper less than 1/500 inch in thickness, thin as it is, takes on a glutinous or colloid surface, and thus requires some thirty minutes to enable the nitration to take place. With a thicker paper only the surface would be nitrated. He therefore uses a fibre that has been saturated with a solution of nitrate of soda, and afterwards dried slowly, claiming that the salt crystallises in the fibre, or enters by the action termed osmose, and opens up the fibre to the action of the acid. This process would only be useful when the cotton is to be nitrated at a low temperature. At a high temperature it would be unnecessary. 

To give an idea of the great variety of proteins which exists, considered only from a chemical point of view, the amino-acids known to be present in proteins, are summarized in Table 3. From the colloidal point of view the situation is still more complicated because there are linear proteins (fibrin, glutin), and globular proteins also (albumin, globulin). Furthermore, there are also proteins with an interlinked net-structure (keratin). 

Colorless purified glue or glutin is known as gelatin. Glue is made by boiling collagen in water to which acid has been added. The chemical composition is approximately as follows ... 

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