Naslov
Chemical stimulation of mussel spawning - a novel technique for biominerals production

Autori
Medaković, Davorin

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Learning from nature how to design new implantable biomaterials: from biomineralization fundamentals to biomimetic materials and processing routes / Reis, Rui L. - Alvor : NATO / Advanced Study Institute, 2003, 59-59

Skup
Learning from nature how to design new implantable biomaterials: from biomineralization fundamentals to biomimetic materials and processing routes

Mjesto i datum
Alvor, Portugal, 13.10.2003. - 24.10.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Mytilus edulis; Barium chloride; Biominerals; Barite; Dolomite; Gypsum; Spawning; Larval shells
(Barium chloride; Biominerals; Barite; Dolomite; Gypsum; Spawning; Larval shells)

Sažetak
Living creatures may deposit-precipitate biominerals in different ways, in a great variety of forms, shapes, orientations and with diverse functions. It is known that organisms from 55 distinctive phyla (from most primitive bacteria to the mammalian) can form more than 60 diverse biominerals Also it is known that calcium minerals represent about 50% of all biogenic minerals in the form of carbonates, sulfates, or phosphates. Other groups are iron containing sulfates and iron oxides and silica biominerals [1, 2, 3, 4]. In these research production of gypsum, barite, dolomite and another minerals never before recorded in Phylum Mollusca was described. Adult mussels Mytilus edulis sampled from the rocky shore of the Isle of Helgoland (North Sea, Germany) were induced to spawn by mechanical, thermal and chemical stimulation. Fertilized eggs were cultivated under controlled conditions for 80 hours, up to a developed veliger stage. Samples were taken every two hours after fertilization. Changes in morphology were observed by optical microscopy. Mineral components and phase fractions were determined using qualitative and quantitative X-ray diffraction. Diffraction patterns show that in the case where spawning was induced by barium chloride, the mineral composition of the larval shells were different from that where stimulation was mechanical, thermal or by other chemical compounds. The larvae contain in their prodissoconch I and prodissoconch II shells minerals as gypsum, barite, dolomite, halite and an unidentified phase in fractions from traces up to 20 molar %. However larvae were morphologically similar to the larvae with "normal " biominerals in the shells, i.e. calcite and aragonite [5]. Although in these research and generally, many aspects of early molluscan biomineralization and shell formation yet remain unexplained, possibilities to using mussels larvae like new biominerals producers are discussed. References [1] Lowenstam HA. Minerals formed by organisms. Science NY 1981 ; 211:1126-1131. [2] Addadi L, Berman A, Moradian OL, Weiner S. Structural and stereochemical relations between acidic macromolecules of organic matrices and crystals. Connect Tissue Res 1989 ; 21:127-135. [3] Mann S. Biomineralization: a novel approach to crystal engineering. Endeavour (New Ser) 1991 ; 15(3):120-125. [4] Webb J, Evans LA, St.Pierre TG, Macey DJ. Biominerals - source and inspiration for novel advanced materials. Search, Sydney 1991 ; 22(4):137-139. [5] Medaković D. Carbonic anhydrase activity and biomineralization process in embryos, larvae and adult blue mussels Mytilus edulis L. Helgol Mar Res 2000 ; 54:1-6.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA