coral colored stone (Business Opportunities - Money Making)
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Item ID 9489119 in Category: Business Opportunities - Money Making
coral colored stone | |
Free Online Advertising Free Internet Web Site Advertising. UK Free Classifieds United Kingdom Free Ads Website. 100% Free Ad Posting. Canada Free Ads Popular Online Classifieds in Canada. No Sign up, No Email Required to Post. Non-slip stone tiles Aristotle’s successor, was the first to take an interest in coral stone which he considered to be a petrified plant. Until the 17th century, the stone is perceived as a strange underwater shrub whose milky sap was observed in 1613 by a gentleman from Lyon. In 1706, the Count of Marsigli mentioned coral’s flowers, coral stone was recognized as a kind of animal close to the octopus by Jean André de Peysonnel, in his memoir of 1744. Over the centuries, the knowledge of the stone has been refined. Réaumur and Jussieu, who initially contradicted the idea of the stone being an animal, finally recognized this thesis as soon as they learned of Tremblay’s work on the freshwater hydra. In 1863, studies by Lacaze-Dythier researchers demonstrated the validity of this thesis. Raising many questions, L’Oréal Recherche wished to carry out a study by scientific researchers to verify the action of UV filters on corals. As sun creams have been criticized for years for their potential harmful impact on corals, the aim was to find a result that could reveal the real consequences of sun creams on biodiversity. The source of problems is notably zinc oxide and titanium oxide which cause the spread of infection. The result of this work reveals an absence of the harmful impact of UV filters on the photosynthetic activity of corals. L’Oréal’s biodiversity group and the impact that their products can have on biodiversity have taken into account coral reef bleaching to evaluate this scientific test, as coral bleaching is synonymous with coral die-off. Even when exposed to higher levels of bleaching than in the marine environment, corals retain their photosynthetic capacity. Finally, corals are animals found in the oceans and are characterized by a calcareous skeleton. he body of each polypier is about 2 mm long, similar to a tubular bag with 8 inner compartments, and a hole with 8 finely serrated tentacles. This bag is inserted into a connective tissue, the so-called coenorsarc, in which it can fully retract like sea anemones. All the individuals of the colony or superorganism are interconnected by a system of vessels running parallel to the axis of its « branches » and carrying a whitish fluid. When danger approaches, the entire colony is enclosed within the coernosarc. This explains Marsigli’s interpretation of a blooming of « flowers » when the individuals reappear after the danger has passed. The foot of the polyps and the base of the coenosarc secrete calcareous spicules whose successive deposits form an external skeleton to the superorganism. The latter thus resembles a leafless shrub, whose petrified branches have a kind of gelatinous bark. In the same superorganism, all individuals are of the same sex. However, some branches of a « tree » may carry « individuals » of different sexes. Coral superorganisms multiply and spread by coralblocks reproduction. Each egg matures at the end of a stalk in the stomach cavity of a female polyp. It is there that sperm spread into the water by the male polyps comes to fertilize it. The result is an elongated microscopic larva that in the ocean becomes a kind of small jellyfish. Coral is found in a coral reef. The Great Barrier Reef is the best known ecosystem. Coral stone’s chemical composition is as follows: Calcium carbonate, CaCO3, with magnesia and organic substances. Hardness: 3-4. Density: 2.6 to 2.7. All over the world, deposits are found in the Malaysian Archipelago, in the Bay of Biscay, in the Canary Islands, in Japan, in the Mediterranean, in the Red Sea and in the North of Australia. | |
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| Target Nation: All Nations Target City : UNITED STATES Last Update : 18 March 2024 7:21 AM Number of Views: 57 | Item Owner : coral magazine Contact Email: Contact Phone: 2693727627 |
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2024-05-29 (0.254 sec)