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Der Kohlenhydratstoffwechsel der Gräser.- I. Einleitung.- II. Das Pflanzenmaterial.- III. Die Isolierung der löslichen Kohlenhydrate.- IV. Die analytischen Methoden.- V. Die Konstitution der Polysaccharide der Gräser.- VI. Die niedermolekularen Kohlenhydrate in den Gräsern.- VII. Die Biogenese der Oligo- und Polysaccharide der Gräser.- VIII. Abwandlungen des Kohlenhydrat- und des Eiweißgehaltes im Laufe einer Vegetationsperiode.- IX. Anwendungen auf die Grünlandwirtschaft.- Some in vitro Conversions of Naturally Occurring Carotenoids.- I. Introductory Remarks.- II. Preparation and Conversions of Carotenoids by Means of N-Bromosuccinimide.- III. Conversions of Carotenoids via their Boron Trifluoride Complexes.- IV. Dehydration and Dehydrogenation of Lutein.- V. Some Spectroscopic Observations.- References.- The Chemistry of Podophyllum.- I. History.- II. Preparation of Podophyllin.- III. Composition of Podophyllum.- IV. Other Sources of Podophyllum Lignans.- V. Isolation Procedures.- VI. Podophyllotoxin.- VII. Desoxypodophyllotoxin.- VIII. Dehydropodophyllotoxin.- IX. 4?-Demethylpodophyllotoxin.- X. The Peltatins.- XI. Sikkimotoxin.- XII. Lignan Glucosides.- XIII. Ionic Derivatives of Podophyllotoxin and of the Peltatins.- XIV. Flavonols.- XV. Absorption Spectra.- XVI. Biological Action.- XVII. Tables.- References.- X-ray Analysis and the Structure of Vitamin B12.- I. Introduction.- II. Some Characteristics of the X-ray Crystallographic Methods Applied to the Analysis of Vitamin B12.- III. The Determination of the Structure of Vitamin B12.- IV. The Chemical Reactions of Vitamin B12.- V. Biochemical Problems Connected with the B12 Structure.- VI. The Crystal Structures of Vitamin B12 and the Hexacarboxylic Acid.- VII. Conclusion.- References.- Namenverzeichnis.Index of Names. Index des Auteurs.- Sachverzeichnis. Index of Subjects. Index des Matières.ro-?-carotene-BF3 and 3,4-Dehydro-?-carotene-BF3.- c) retro-Bisdehydrocarotene-BF3.- 4. Cleavage Products of the Lycopene-BF3 Complex.- 5. Cleavage Products of the ?-Carotene-BF3 Complex.- 6. Cleavage Product of the Anhydrovitamin A1-BF3 Complex.- IV. Dehydration and Dehydrogenation of Lutein.- V. Some Spectroscopic Observations.- Position of the Maxima.- Lengthening of the ?-Carotene Chromophore.- Influence of the Spatial Configuration.- Transition from normal to retro Structures.- Spectral Curves.- References.- The Chemistry of Podophyllum.- I. History.- II. Preparation of Podophyllin.- III. Composition of Podophyllum.- IV. Other Sources of Podophyllum Lignans.- V. Isolation Procedures.- 1. Isolation without Chromatography.- 2. Adsorption Chromatography.- 3. Partition Chromatography.- VI. Podophyllotoxin.- 1. Properties.- 2. Structure.- 3. The Apopicropodophyllins.- 4. Stereochemistry.- 5. Synthetic Approaches.- VII. Desoxypodophyllotoxin.- VIII. Dehydropodophyllotoxin.- IX. 4?-Demethylpodophyllotoxin.- X. The Peltatins.- XI. Sikkimotoxin.- XII. Lignan Glucosides.- XIII. Ionic Derivatives of Podophyllotoxin and of the Peltatins.- XIV. Flavonols.- XV. Absorption Spectra.- 1. Ultraviolet Spectra.- 2. Infrared Spectra.- XVI. Biological Action.- XVII. Tables.- 1. Well-characterized Compounds Isolated from Podophyllum Species.- 2. Solvates and Modifications of Podophyllotoxin.- 3. Molecular Rotations of Compounds in the Conidendrin and Desoxypodophyllotoxin Series.- 4. Podophyllotoxin and Derivatives.- 5. Desoxypodophyllotoxin and Derivatives.- 6. 4?-Demethylpodophyllotoxin and Derivatives.- 7. Peltatins and Derivatives.- 8. Sikkimotoxin and Derivatives.- 9. Lignan Glucosides and Derivatives.- 10. Maximum Tolerated Doses (MTD) and Minimum Effective Doses (MED) in Mice Bearing Sarcoma 37.- 11. Ionic Derivatives of Podophyllotoxin and of the Peltatins, and Intermediates.- 12. Flavonols and Derivatives.- 13. Ultraviolet Absorption Maxima of Podophyllum Lignans and of Some of Their Derivatives.- References.- X-ray Analysis and the Structure of Vitamin B12.- I. Introduction.- II. Some Characteristics of the X-ray Crystallographic Methods Applied to the Analysis of Vitamin B12.- III. The Determination of the Structure of Vitamin B12.- 1. Preliminary Crystallographic Measurements and Observations.- 2. The Stages of Atom Identification.- a) The Cyanide Group.- b) The "Nucleotide" Group.- c) The Corrin Nucleus.- d) The Side-chains Attached to the Nucleus.- e) The Propanolamine Groups.- 3. The Problem of Right and Wrong Atoms.- 4. The Refinement of the Atomic Positions.- 5. The Absolute Configuration of the Molecule.- 6. The Chemical Formulae of Vitamin B12 and the Hexacarboxylic Acid.- IV. The Chemical Reactions of Vitamin B12.- V. Biochemical Problems Connected with the B12 Structure.- VI. The Crystal Structures of Vitamin B12 and the Hexacarboxylic Acid.- VII. Conclusion.- References.- Namenverzeichnis. Index of Names. Index des Auteurs.- Sa
Contents
Der Kohlenhydratstoffwechsel der Gräser.- I. Einleitung.- II. Das Pflanzenmaterial.- III. Die Isolierung der löslichen Kohlenhydrate.- IV. Die analytischen Methoden.- V. Die Konstitution der Polysaccharide der Gräser.- VI. Die niedermolekularen Kohlenhydrate in den Gräsern.- VII. Die Biogenese der Oligo- und Polysaccharide der Gräser.- VIII. Abwandlungen des Kohlenhydrat- und des Eiweißgehaltes im Laufe einer Vegetationsperiode.- IX. Anwendungen auf die Grünlandwirtschaft.- Some in vitro Conversions of Naturally Occurring Carotenoids.- I. Introductory Remarks.- II. Preparation and Conversions of Carotenoids by Means of N-Bromosuccinimide.- III. Conversions of Carotenoids via their Boron Trifluoride Complexes.- IV. Dehydration and Dehydrogenation of Lutein.- V. Some Spectroscopic Observations.- References.- The Chemistry of Podophyllum.- I. History.- II. Preparation of Podophyllin.- III. Composition of Podophyllum.- IV. Other Sources of Podophyllum Lignans.- V. Isolation Procedures.- VI. Podophyllotoxin.- VII. Desoxypodophyllotoxin.- VIII. Dehydropodophyllotoxin.- IX. 4?-Demethylpodophyllotoxin.- X. The Peltatins.- XI. Sikkimotoxin.- XII. Lignan Glucosides.- XIII. Ionic Derivatives of Podophyllotoxin and of the Peltatins.- XIV. Flavonols.- XV. Absorption Spectra.- XVI. Biological Action.- XVII. Tables.- References.- X-ray Analysis and the Structure of Vitamin B12.- I. Introduction.- II. Some Characteristics of the X-ray Crystallographic Methods Applied to the Analysis of Vitamin B12.- III. The Determination of the Structure of Vitamin B12.- IV. The Chemical Reactions of Vitamin B12.- V. Biochemical Problems Connected with the B12 Structure.- VI. The Crystal Structures of Vitamin B12 and the Hexacarboxylic Acid.- VII. Conclusion.- References.- Namenverzeichnis.Index of Names. Index des Auteurs.- Sachverzeichnis. Index of Subjects. Index des Matières.
