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xanthophylls

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  • Separation of Photosynthetic Pigments by Paper Chromatography Total elapsed time was somewhere around 9 minutes. From bottom to top, the pigments are chlorophyll b, chlorophyll a, xanthophylls, and carotene. The initial mixture was extracted from spinach leaves, and the chromatography solvent is a 9:1 mix of acetone and petroleum ether.
  • DAWN OF FALL IN CENTRAL PARK 2009.mov AS DAY LIGHT SHORTENS AND NIGHTS GROW LONGER AND COOLER, FALL FOLIAGE BEGINS. BIOCHEMICAL PROCESSES STOP LEAF CARBOHYDRATES AND DAILY REPLACEMENT OF CHLOROPHYLL. THE GREEN COLOR MASKED THE YELLOW AND ORANGE PIGMENTS AND REDS AND PURPLE PIGMENTS ARE ACTIVATED BY THE LEAF SUGAR. BRILLANT COLOR UNTIL THE LEAF DROPS
  • 90w LED UFO Comparison 400w HPS Click 90 Watt LED UFO * Each light contains 90 x 1 watt LEDs, 7:1:1 red/blue/orange ratio * Precision red LEDs (flowering) * Precision blue LEDs (vegetation) * Precision orange LED\'s (mid-spectrum) * True optimized spectrum with tight-tolerance LEDs * Unrivaled chlorophyll/carotenes/xanthophylls absorption * Uses wide-angle (120°) LEDs for max coverage & output * Extremely efficient, integral reflector * Dazzling, powerful light * No infrared rays or ultraviolet radiation to stunt plants * LEDs emit light without using filaments; light runs cool * Built-in, ballast-free, power supply * 10-years or more life-expectancy with minimum decay * Three low-noise fan * Operates on 120 volts; standard 3-prong cord included * Built-in lugs for easy mounting & hanging * CE & ROHS compliant * Brand new in original box * No Bulbs to replace, no maintenance costs * Discrete, no thermal footprint * Dimensions: 7.5\"x 3.5\" * 3 Year Warranty