█ _ FREDERICK GEORGE MANN & BERNARD CHARLES SAUNDERS 1936 حصريا كتاب ❞ Practical Organic Chemistry ❝ 2025 Chemistry: IN the preparation of this revised and extended edition, we have had in mind two major factors First, considerably greater emphasis has been placed on semimicro techniques their application to preparations, separations, analysis physical determinations such as those of molecular weight We have therefore greatly expanded the section Manipulation a semi micro scale which was the Third Edition, described many more preparations on scale, some independent others alternatives to the larger preparations immediately precede them Some 40 separate are described detail, addition specific directions for the preparation classes crystalline derivatives required for identification purposes The equipment required these small reactions selected realistic basis, and care taken not include very curious pieces of apparatus sometimes suggested necessary working the semi مجاناً PDF اونلاين