Peter Griess,German chemist and azo dye pioneer
Numéro d’image : 11828769
| Peter Griess. Portrait of Johann Peter Griess (1829-88),German chemist and discoverer of azo dyes. Griess was educated at the universities of Jena and Marburg. He became an assistant of the German chemist August von Hofmann at the Royal College of Chemistry in London,Britain,in 1858. In 1862 he took up an industrial post at a brewery,staying there for the rest of his career. In 1862 he discovered that aromatic amines (like aniline) react with nitrous acid to form diazonium salts. These in turn reacted with phenols to produce azo dyes. The first dye,Manchester or Bismarck brown,was discovered within a year but Griess received no reward for his achievement | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library |
| Taille de l’image : | 3881 px × 4550 px |
| Model Release : | Le droit n'est pas encore disponible. Merci de nous contacter avant utilisation. |
| Property Release : | Non requis |
| Restrictions : | - |
Prix pour cette image À partir de 45 €
Produit vendu
(Calendrier, Carte postale, Carte de vœux, Impression sur textile, Packaging etc)
À partir de 45 €
Usage commercial
(Affichage, Annonce presse, Annonce TV, Carte, Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 45 €
Éditorial
(Digital, Journal, Livre, Livre pratique, Magazine, Télévision etc)
À partir de 60 €
Usage non-commercial
(Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 120 €