Estrogen deficiency has been proposed as a risk factor for alveolar bone loss, but whether or not estrogen will influcence the bone rebuilting process during or
A portable and comfortable wireless ECG monitoring system composed of fabric electrodes and a monitoring terminal was proposed,which is essential to continuous
In this study,the macroporous calcium phosphate cement with oriented pore structure was prepared by freeze casting.SEM observation showed that the macropores in
<正>As hard as it may be to believe,every human starts out as a single cell(around one two-hundredth of an inch in size)formed when the right sperm cell meets t