منابع مشابه
Shelled out
For evolutionary biologists reptiles and islands provide rich pickings. One of the world’s largest land reptiles, the komodo dragon, is confined to just a couple of small Indonesian islands, and one of the rarest snakes is found on an islet off the Caribbean island of St. Lucia. Even the heavily touristed Mediterranean island of Mallorca boasts its own lizard species on an offshore islet. But f...
متن کاملEggshell Pigmentation Study in Blue-shelled and White-shelled Ducks
This study attempted to clarify the difference in eggshell pigmentation between blue-shelled ducks (BSD) and whiteshelled ducks (WSD). The eggshell pigmentation deposition process is discussed. Ultraviolet spectro-photometer and HPLC were used to determine the biliverdin concentration in the shell gland, uterus liquid and eggshell at 6, 12, 18, 20, 23.5 h post-oviposition. The biliverdin concen...
متن کاملComparison of HMOX1 expression and enzyme activity in blue-shelled chickens and brown-shelled chickens
Blue egg coloring is attributed to biliverdin derived from the oxidative degradation of heme through catalysis by heme oxygenase (HO). The pigment is secreted into the eggshell by the shell gland. There is uncertainty as to whether the pigment is synthesized in the shell gland or in other tissues. To investigate the site of pigment biosynthesis, the expression of heme oxygenase (decycling) 1 (H...
متن کاملAcceptance of brown-shelled eggs in a white-shelled egg market.
Brown eggs have gradually entered the traditional white-egg markets as a distinctive mode for packaging specialty eggs. A test was conducted at the Brigham Young University Sensory Laboratory (Provo, UT) to understand how consumers view attributes of the brown egg relative to the white egg. The objectives were to see how the consumer viewed properties of eggs by color and to examine the prefere...
متن کاملStructure of double-shelled rice dwarf virus.
Rice dwarf virus (RDV), a member of the Reoviridae family, is a double-stranded RNA virus. Infection of rice plants with RDV reduces crop production significantly and can pose a major economic threat to Southeast Asia. A 25-A three-dimensional structure of the 700-A-diameter RDV capsid has been determined by 400-kV electron cryomicroscopy and computer reconstruction. The structure revealed two ...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2007
ISSN: 0960-9822
DOI: 10.1016/j.cub.2007.04.008