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Study shows that compaction and cementation can play a destructive role in Suining formation reservoir,while dissolution and fracturing can play a constructive role in that.The main facies of Suining formation are ferruginous-shale film,anhydrite,dolomite and calcite.The micro-fracture and grain-edged fracture mainly resulted from compaction fracturing,compaction slipping and tectonic dynamic force greatly improve the reservoir permeability.

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When dietary vitamin A supplements ranged from 1×10〓 to 1×10〓 IU/kg, vitamin D significantly (P＜0.05) decreased the ratio of calcite/aragonite in shell.

當飼料中維生素A的添加量在1×10〓IU/kg到1×10〓IU/kg的范圍內(nèi)，維生素D顯著降低貝殼中方解石/文石的比例（P＜0.05）情侣黄片免费。

Mineral compositions of phosphate concretions mainly contain apatite, quartz, calcite, barite, pyrite and organic matter, etc.

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This calcite forming algae created rounded biscuits, and those biscuits are covered with irregular, rounded protuberances.

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The depressing ability of the macromolecule organic depressants can be improved by the increase of their D.S.. The high D.S. CPVA and CPEG show strong depressing ability to calcite, while CPEG indicates strong depressing ability to diaspore, and HPAM to pyrite.The depressing mechanism of organic depressants was confirmed by the measurements of zeta potential, contact angles, adsorption capacity and IR spectrum.

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