Uranium glass of uranium glass is pale yellowish-green, which in the 1920s led to the nickname vaseline glass based on a perceived resemblance to the appearance of petroleum jelly as formulated and commercially sold at that time. Specialized collectors still define vaseline glass as transparent or semi-transparent uranium glass in this specific color. Vaseline glass is now used as a synonym for any uranium glass, especially in the United States, but this usage is not universal. The term is sometimes carelessly applied to other types of glass based on certain aspects of their superficial appearance in normal light, regardless of actual uranium
Egg jelly sulfated fucan glycoproteins play an important role in binding to sperm receptors and triggering the acrosomal reaction. Many other functions for the egg jelly have been proposed including sperm agglomeration, protection from mechanical stress and polyspermy, and increasing the size of the egg to improve its chances of colliding with sperm. In addition to the sea urchin, egg jelly appears in many species including invertebrates and mammals, and can vary in composition and complexity from the relatively homogenous single layer sea urchin egg to the three layer egg jelly in starfish. Egg jelly Egg jelly(extracellular layer", "jelly coat) is a