Biomineralization of carbonates by Halobacillus trueperi in solid and liquid media with different salinities.
Biomineralization of carbonates by Halobacillus trueperi in solid and liquid media with different salinities.
复制标题
DOI：
10.1016/j.femsec.2003.12.008
复制
发表时间：
2004-04
影响因子：
4.2
通讯作者：
M. Rivadeneyra;J. Párraga;R. Delgado;A. Ramos‐Cormenzana;G. Delgado
中科院分区：
文献类型：
--
作者：
M. Rivadeneyra;J. Párraga;R. Delgado;A. Ramos‐Cormenzana;G. Delgado
研究了真嗜盐芽孢杆菌在不同盐浓度和不同镁钙比条件下对碳酸盐的沉淀作用。在所有测定的盐浓度下，均出现真正的沉淀。当盐浓度增加时，生物质的数量和尺寸减小，所需的时间增加。沉淀的矿物质（由X-射线衍射测定）方解石，镁方解石和monohydrocalcite在不同的比例取决于盐度和介质的物理状态;镁方解石的镁含量也随文化类型而变化。根据饱和指数，其它矿物也可沉淀。扫描电子显微镜显示，占主导地位的形态的生物体是球晶与纤维辐射内部。我们证明了H.在碳酸盐的沉淀过程中，TruePeri起着积极的作用，我们推测这是一个生物矿化过程。
We investigated the precipitation of carbonates byHalobacillus trueperiin both solid and liquid media at different salt concentrations and different magnesium/calcium ratios.H. trueperiprecipitated at all assayed salt concentrations. When salt concentration increased, the quantity and the size of bioliths decreased and the time required increased. The precipitated minerals (determined by X-ray diffraction) were calcite, magnesium calcite and monohydrocalcite in variable proportions depending on the salinity and the physical state of the medium; the magnesium content of the magnesium calcites also varied with regard to the culture type. According to the saturation indices other minerals could also precipitate. Scanning electron microscopy showed that dominant morphologies of the bioliths were spherulitic with fibrous radiated interiors. We show thatH. trueperiplays an active role in the precipitation of carbonates and we hypothesize about this process of biomineralization.