Glass, organic germanate glasses

A hard German glass tube, such as is generally employed ia organic analysis, is teken and drawn out in the form represented by a, J, e, in Fig. 369. 

Erlenmeyer, R.A.K.E. (1825-1909). A German chemist noted for organic research. Designer of a conical glass flask with flat bottom, used extensively in chem laboratories Ref Hackh sDict (1944), 313 L... 

These methods of testing glass are basically similar to other compendial limits and other standards on glass such as those in International Organization for Standardization (ISO), German DIN (Deutsches Insti-tut fiir Normung), and the ASTM. The expected limit... 

Natural polymers were less dense, more robust and cheaper than glass and ceramics but were not available in the wide range of colours and forms required by artists. Such needs inspired the development of synthetic alternatives. The other influence on synthetic polymers were the developments in practical synthetic organic chemistry in the first half of the nineteenth century. The first synthesis of an organic chemical was carried out by the German chemist, Wohler, in 1824. 

The German company Helm AG is marketing silver-based biocides in a glass matrix, i.e., glass particles, in the belief that it will persist longer and offer better long-term protection than organic biocides incorporated in the normal manner. 

---