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Wholesale anklets amalgam |
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Wholesale anklets amalgamWholesale anklets amalgam REFERENCES (1) Schilder, M. and Schilder, F. A. "Minima and Maxima in Philippines Fashion Philippines Jewelry Fashion Jewellry Jewelri Fashion Accessories Necklace Bracelet Anklet necklaces bracelets anklets S Shells" Philippine Shell News Vol. XII, No. 12, pp. 6, 7 and 8 October, 1964. Wholesale anklets amalgamWholesale anklets amalgam A gastropod, such as a littorine, after settlement on a preferred substrate, begins a rapid growth phase. As the mantle grows so does the shell which is formed by the mantle. The first portion of the shell deposited is the organic matrix (conchiolin). The pigment melanin is probably simultaneously bound to this protein matrix. Initially, the new shell is thin and lightly calcified although the pattern is fully developed. Additional deposition of calcium carbonate crystals occurs later. The pigmentation pattern of the shell depends on the localization of pigment-producing cells in the mantle edge and the temporal rhythm of transferral of this pigment to the shell matrix. The sculpture is dependent upon the areas of the mantle which fold, the size and extension of the folds, the resultant structure of the organic matrix and the temporal rhythm in the deposition of calcium carbonate, as well as in the production of the folds themselves. The basic temporal rhythm appears to be a 24-hr. interval. For example, in Philippine littorines, there is an endogenous 24-hr. rhythm in the formation of a new growth stria, in the production of pigment spots and the construction of sculpture nodes. During the maximmn growth phase prior to sexual maturity, L. pintado deposits a pigment spot in a spiral row every other 24-hr. period. Adjacent spiral rows are on an alternate rhythm so that the pattern resulting is a "checkerboard" (J). This species has no significant sculpture, but in a form of another, L. picta, each spiral row consists of a series of nodes, one node being produced per day during maximum growth. Wholesale anklets amalgam wholesale anklets amalgam,handmade craft,jewelry coconut,jewelry handcrafts,jewelry philippines government,philippines pukkas shell,laundry basket online,shells natural,decorative items,wholesale anklets amalgam
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Updated June 3, 2004 |
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