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Pigments in Fruits
Structure, physicol chemical properties and analitical method, description of the location, biosynthesis of pigments and biochemical changes which occur during early fruit development, maturation and senescence and factors affect these changes; Chlorophylls; Anthocyanins; Carotenoids.
Natural Products
This new edition has been updated to include the following: The use of biomarkers (organic compounds in the geospherical record with carbon skeletons) reflecting the upsurge in geoporphyrin research primarily due to MS, yeast RNA nucleic acid studies: reversed-phase HPLC of amino acids; brewing industry applications (HPLC evaluation of carotenoids in orange juice and of "debittered" citrus); HPTLC of carbohydrates; synthesis of a sweetening agent from citrus peels, synthesis and degradation of alkaloids and of sterols, GC/MS uses with sterols, petroleum products, and aromatic constituents of wine and grape juice, flash chromatography of essential oils, optical purity of enantiomers affecting...
Carotenoids: Structure and Function in the Human Body
Plants produce chemicals as part of their normal metabolic activities. These include primary metabolites found in all plants, such as sugars and fats, as well as secondary metabolites, which can have therapeutic effects in humans and be refined to produce drugs. Plants synthesize a bewildering variety of phytochemicals, but most are derivatives of a few biochemical motifs. Numerous herbal-derived substances have been evaluated for their therapeutic potential. These include alkaloids, coumarins, saponins, plant pigments and flavonoids. Flavonoids, carotenoids and anthocyanins are probably the best known of these substances due to their antioxidant properties. Carotenoids: Structure and Functi...
The Microscopic and Chemical Parts of Plants
The plant's cells and their several specialized working subunits are examined in addition to chemical traits like color, scent, and the hormonal effects that turn leaves toward the light and allow other adaptations to the surroundings. And the major processes driven by chemical changes over time that together are the life cycle of the plant are considered."--BOOK JACKET.
Physical and Chemical Characteristics of Chloroplast Fragments
Chloroplasts isolated from spinach leaves were physically fragmented and then fractionated by differential centrifugation. A high-activity fraction, designated CF(20-50), was obtained and retained its high activity regardless of environmental changes. It had a low protein content and a relatively high chlorophyll-to-protein ratio. Plastoquinone was present in high concentration. Extraction of plastoquinone from CF(20-50) inhibited Hill activity. Unlike whole chloroplasts, re-addition of plastoquinone failed to induce even partial recovery. The average particle size in CF(20-50) was 1500 angstroms in diameter. The average sedimentation constant was 800; the molecular weight was about 80,000,000; and it showed three electrophoretic bands. CF(20-50) showed maximal Hill activity, but was not the smallest photo-active unit studied. Although the nature of the smallest functional unit is uncertain, it is clear that a CF(20-50) particle is composed of smaller sub- units probably oriented to impart high activity to the larger composite structure.
Acta Horticulturae
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Proceedings
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