On the basis of reviewing the progress in the high efficient enrichment from secondary resources of low grade precious metals at home and abroad, a process route of the high efficient enrichment precious metals from s...On the basis of reviewing the progress in the high efficient enrichment from secondary resources of low grade precious metals at home and abroad, a process route of the high efficient enrichment precious metals from secondary resources of low-grade metals by adding iron oxide as the trapping agent, reducing agent, additive, mixing uniformly and grinding, pelletizing, reduction, grinding and separation, and selectively acid leaching iron has been put forward in this paper. The experiments of reduction, grinding and separation, and selectively acid leaching iron were carried out mainly. Under the decided experiment parameters and conditions, iron generated during the reduction can trap precious metals during reduction, high active alloy powders were obtained from the reduced products by grinding and separation, the concentration of precious metals was obtained by acid leaching high active alloy powders. The better enrichment effect was obtained by adopting the technical route of processing. Other low grade noble metal materials and enrichment ratio of precious metals from the materials to acid products was high through acid leaching. This process has the advantages of simple process, environmental-friendly, strong adaptability of raw materials, high concentration ratio, which was regarded as a kind of the general efficient enrichment technology of low grade precious metal materials.展开更多
目的对1例无创产前检测提示22q11.21存在2.4 Mb缺失的胎儿进行产前诊断,确定缺失来源,为其家系提供遗传咨询。方法行羊水穿刺术后,通过常规染色体核型分析和基因组拷贝数变异测序(copy number variation sequencing,CNV-seq)对胎儿进行...目的对1例无创产前检测提示22q11.21存在2.4 Mb缺失的胎儿进行产前诊断,确定缺失来源,为其家系提供遗传咨询。方法行羊水穿刺术后,通过常规染色体核型分析和基因组拷贝数变异测序(copy number variation sequencing,CNV-seq)对胎儿进行产前诊断,应用CNV-Seq技术对母亲外周血进行比对分析。以明确无创提示的高风险的来源。结果无创补充报告提示22q11.2缺失综合征高风险;胎儿羊水染色体核型:46,XN,21Ph+,胎儿羊水CNV-Seq结果:Seq(1-22)x2,(X,N)x1;孕妇外周血CNV-Seq结果:seq[hg19]22q11.21(18,954,452-21,449,606)x1,即母亲22q11.21区域存在片段大小约2.4Mb的拷贝数缺失,为致病性拷贝数变异。考虑之前无创结果22q11.2缺失综合征高风险是因为母亲本身为该疾病的患者。结论无创提示22q11.2缺失综合征高风险为母亲本身为该疾病的患者,胎儿未遗传。展开更多
基金The National Basic Research Program( 973 Plan) of China(2012CB724201)
文摘On the basis of reviewing the progress in the high efficient enrichment from secondary resources of low grade precious metals at home and abroad, a process route of the high efficient enrichment precious metals from secondary resources of low-grade metals by adding iron oxide as the trapping agent, reducing agent, additive, mixing uniformly and grinding, pelletizing, reduction, grinding and separation, and selectively acid leaching iron has been put forward in this paper. The experiments of reduction, grinding and separation, and selectively acid leaching iron were carried out mainly. Under the decided experiment parameters and conditions, iron generated during the reduction can trap precious metals during reduction, high active alloy powders were obtained from the reduced products by grinding and separation, the concentration of precious metals was obtained by acid leaching high active alloy powders. The better enrichment effect was obtained by adopting the technical route of processing. Other low grade noble metal materials and enrichment ratio of precious metals from the materials to acid products was high through acid leaching. This process has the advantages of simple process, environmental-friendly, strong adaptability of raw materials, high concentration ratio, which was regarded as a kind of the general efficient enrichment technology of low grade precious metal materials.
文摘目的对1例无创产前检测提示22q11.21存在2.4 Mb缺失的胎儿进行产前诊断,确定缺失来源,为其家系提供遗传咨询。方法行羊水穿刺术后,通过常规染色体核型分析和基因组拷贝数变异测序(copy number variation sequencing,CNV-seq)对胎儿进行产前诊断,应用CNV-Seq技术对母亲外周血进行比对分析。以明确无创提示的高风险的来源。结果无创补充报告提示22q11.2缺失综合征高风险;胎儿羊水染色体核型:46,XN,21Ph+,胎儿羊水CNV-Seq结果:Seq(1-22)x2,(X,N)x1;孕妇外周血CNV-Seq结果:seq[hg19]22q11.21(18,954,452-21,449,606)x1,即母亲22q11.21区域存在片段大小约2.4Mb的拷贝数缺失,为致病性拷贝数变异。考虑之前无创结果22q11.2缺失综合征高风险是因为母亲本身为该疾病的患者。结论无创提示22q11.2缺失综合征高风险为母亲本身为该疾病的患者,胎儿未遗传。
