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巢式PCR-RFLP法对湖南省乙型肝炎病毒Bj和Ba基因亚型的初步鉴定
巢式PCR-RFLP法 湖南省 乙型肝炎病毒 Bj Ba 基因亚型
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2009/8/3
目的: 检测湖南省乙型肝炎病毒(HBV)基因亚型(Bj或Ba)的分布情况，了解基因亚型与HBV致病性的关系，希望以此诠释相同基因型HBV导致不同病情的机制. 方法: 随机选取经多对型特异性引物巢式PCR法鉴定为B基因型HBV的血清标本50例，包括慢性HBV携带者和慢性重型乙型肝炎患者各25例，采用巢式PCR-RFLP法鉴定其基因亚型(Bj或Ba). 结果: 50例B基因型HBV均为Ba亚型，没有发...
Tracing Error with Björk's Mandibular Structures
CEPHALOMETRICS IMPLANTS
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2009/2/26
The tracing errors associated with the structures used in Björk's method of mandibular superimposition are investigated using multiple tracings of fifty lateral cephalometric radiographs. The...
Association between Björk's Structural Signs of Mandibular Growth Rotation and Skeletofacial Morphology
Skeletofacial morphology Bjö rk's structural signs Mandibular morphology
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2008/12/1
The aim of this study was to apply Björk's structural signs of mandibular growth rotation to answer the questions: (1) Is a hyperdivergent or hypodivergent skeletofacial growth pattern characte...