根据鸡传染性贫血病毒(CIAV)基因组序列,设计一对引物扩增基因组上nt358-nt1042之间684 bp DNA片段。在CIAV感染MDCC-MSB1细胞系中提取核酸为模板可扩增出相应DNA片段,且以感染细胞核酸为模板反应敏感性可达1 fg,而以其他病原核酸为模...根据鸡传染性贫血病毒(CIAV)基因组序列,设计一对引物扩增基因组上nt358-nt1042之间684 bp DNA片段。在CIAV感染MDCC-MSB1细胞系中提取核酸为模板可扩增出相应DNA片段,且以感染细胞核酸为模板反应敏感性可达1 fg,而以其他病原核酸为模板扩增结果均为阴性。应用该PCR方法对实验感染鸡肝脏、脾脏、胸腺、肾脏、法氏囊、骨髓、白细胞、泄殖腔棉拭子等不同样品进行检测,均可扩增出相应DNA片段。证明我们建立的PCR方法敏感性特异性强,可用于临床感染不同组织CIAV的检测。展开更多
Improving the firing accuracy is a final goal of structural optimization of machine guns. The main factors which affect the dispersion accuracy of machine gun are analyzed. Based on the concept of dynamic stability, a...Improving the firing accuracy is a final goal of structural optimization of machine guns. The main factors which affect the dispersion accuracy of machine gun are analyzed. Based on the concept of dynamic stability, a structural optimization model is built up, and the sensitivity of dispersion accuracy to design variables is analyzed. The optimization results of a type of machine gun show that the method is valid, feasible, and can be used as a guide to the structural optimization of other automatic weapons.展开更多
Temporal Firing Patterns of Spontaneous Activity For decades, temporal code has been considered as an important mode encoding neural information and evidence for temporal code in the cortex neurons and the receptors i...Temporal Firing Patterns of Spontaneous Activity For decades, temporal code has been considered as an important mode encoding neural information and evidence for temporal code in the cortex neurons and the receptors is growing. However, the basic temporal firing patterns that may constitute to the temporal coding mode and their generating mechanisms in the展开更多
文摘根据鸡传染性贫血病毒(CIAV)基因组序列,设计一对引物扩增基因组上nt358-nt1042之间684 bp DNA片段。在CIAV感染MDCC-MSB1细胞系中提取核酸为模板可扩增出相应DNA片段,且以感染细胞核酸为模板反应敏感性可达1 fg,而以其他病原核酸为模板扩增结果均为阴性。应用该PCR方法对实验感染鸡肝脏、脾脏、胸腺、肾脏、法氏囊、骨髓、白细胞、泄殖腔棉拭子等不同样品进行检测,均可扩增出相应DNA片段。证明我们建立的PCR方法敏感性特异性强,可用于临床感染不同组织CIAV的检测。
文摘Improving the firing accuracy is a final goal of structural optimization of machine guns. The main factors which affect the dispersion accuracy of machine gun are analyzed. Based on the concept of dynamic stability, a structural optimization model is built up, and the sensitivity of dispersion accuracy to design variables is analyzed. The optimization results of a type of machine gun show that the method is valid, feasible, and can be used as a guide to the structural optimization of other automatic weapons.
文摘Temporal Firing Patterns of Spontaneous Activity For decades, temporal code has been considered as an important mode encoding neural information and evidence for temporal code in the cortex neurons and the receptors is growing. However, the basic temporal firing patterns that may constitute to the temporal coding mode and their generating mechanisms in the
