Xuan-dong Zhang

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OBJECTIVE To investigate whether green tea consumption can reduce the risk of adult leukemia. METHODS A hospital-based matched case-control study was conducted in 2005 - 2006. We recruited 107 confirmed leukemia cases and 110 inpatient controls with orthopedic disease without leukemia or other malignancy matched on gender, age and hospitals that patients(More)
The analysis process and methods of a failure BGA solder joint have been studied by a failure analysis case for an actual BGA package sample with XRD, cross section analysis and SEM&EDS analysis. The analysis results show that the cracks are the main failure causes of the BGA solder joints. The position of cracks appeard between the IMC and PCB pad and the(More)
The analysis process and methods of a failure chip capacitor have been introduced by a failure analysis case for an actual chip capacitor with visual inspection, cross section analysis and SEM&EDS analysis. The analysis results show that the parallel resistance characteristic existed in chip capacitor is main cause for failure; The crack existed in ceramic(More)
OBJECTIVE Severe respiratory distress syndrome (RDS) caused by pulmonary surfactant (PS) deficiency is described not only in preterm infants but also in term babies delivered via caesarean section, especially before the onset of labour (elective caesarean section). Once RDS of term neonates happened, mechanical ventilation is needed, and the infants were at(More)
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