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首页> 外文期刊>Journal of Crystal Growth >Lactic acid bacterial extract as a biogenic mineral growth modifier
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Lactic acid bacterial extract as a biogenic mineral growth modifier

机译:乳酸菌提取物作为生物矿物生长调节剂

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The formation of minerals and mechanisms by which bacteria could control their formation in natural habitats is now of current interest for material scientists to have an insight of the mechanism of in vivo mineralization, as well as to seek industrial and technological applications. Crystalline uniform structures of calcium and barium minerals formed micron-sized building blocks when synthesized in the presence of an organic matrix consisting of secreted protein extracts from three different lactic acid bacteria (LAB) viz.: Lactobadllus plantarum MTCC 1325, Lactobacillus acidophilus NRRL B4495 and Pediococcus acidilactici CFR K7. LABs are not known to form organic matrix in biological materialization processes. The influence of these bacterial extracts on the crystallization behavior was investigated in details to test the basic coordination behavior of the acidic protein. In this report, varied architecture of the mineral crystals obtained in presence of high molecular weight protein extracts of three different LAB strains has been discussed. The role of native form of high molecular weight bacterial protein extracts in the generation of nucleation centers for crystal growth was clearly established. A model for the formation of organic matrix-cation complex and the subsequent events leading to crystal growth is proposed.
机译:如今,材料科学家们对矿物的形成以及细菌可以控制其在自然栖息地中形成的机制的兴趣吸引了材料科学家,使他们对体内矿化的机制有深刻的了解,并寻求工业和技术应用。当在有机基质的存在下合成钙和钡矿物质的晶体均一结构时,形成微米级的结构块,该有机基质由来自三种不同乳酸菌(LAB)的分泌蛋白提取物组成,即:乳酸乳杆菌MTCC 1325,嗜酸乳杆菌NRRL B4495和乳酸小球菌CFR K7。 LAB在生物物化过程中不能形成有机基质。详细研究了这些细菌提取物对结晶行为的影响,以测试酸性蛋白的基本配位行为。在这份报告中,讨论了在三种不同LAB菌株的高分子量蛋白质提取物存在下获得的矿物晶体的各种结构。高分子量细菌蛋白提取物的天然形式在晶体生长的成核中心的生成中的作用已明确确立。提出了有机基质-阳离子络合物的形成模型以及随后导致晶体生长的事件的模型。

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