cells containing tiny crystals of calcium oxalate: and the crystals act like tiny prisms, refracting light rays in such a way that blue wavelengths are selectively reflected Pumpkin Seeds Pumpkin seeds come from the fruits of the New World native Cucurbita pepo, are notable for being deep green with chlorophyll, and for containing no starch, as much as 50% oil, and 35% protein Pumpkin seeds are eaten widely as a snack and in Mexico are used as a sauce thickener There are “naked” varieties that lack the usual tough, adherent seed coat and are therefore much easier to work with Pumpkin seed oil is a prominent salad oil in central Europe The oil, containing mainly polyunsaturated linoleic and monounsaturated oleic acids, is intriguingly changeable in color Pumpkin seeds contain both yelloworange carotenoid pigments, mainly lutein, and chlorophyll Oil pressed from raw seeds is green; but when the seed meal is wetted and heated to increase the yield, more carotenoids are extracted than chlorophyll The result is an oil that looks dark brown in the bottle or bowl from the combination of orange and green pigments; but in a thin layer, for example on a piece of bread dipped into the oil, there are fewer pigment molecules to absorb light, the chlorophyll dominates, and the oil becomes emerald green Sesame Seeds Sesame seeds are the seeds of Sesamum indicum, a plant of the central African savanna that is now mostly grown in India, China, Mexico, and the Sudan Sesame seeds are small, with 250–300 per gram and 7,500–9,000 per ounce, come in a variety of colors, from golden to brown, violet, and black, and are about 50% oil by weight They’re usually lightly toasted (250– 300ºF/120–150ºC for minutes) to develop a nutty flavor, which has some sulfur aromatics ... from the combination of orange and green pigments; but in a thin layer, for example on a piece of bread dipped into the oil, there are fewer pigment molecules to absorb light, the chlorophyll dominates, and the oil becomes...green; but when the seed meal is wetted and heated to increase the yield, more carotenoids are extracted than chlorophyll The result is an oil that looks dark brown in the bottle or bowl from the combination of orange and green... seeds are the seeds of Sesamum indicum, a plant of the central African savanna that is now mostly grown in India, China, Mexico, and the Sudan Sesame seeds are small, with 250–300 per gram and 7,500–9,000