Fingerprint of X-ray diffraction of Tibetan medicine dairy Nanhanshuishi and its application in processing by microwave / 中国中药杂志

The characteristic fingerprint of conventional dairy Nanhanshuishi was established by X-ray diffraction (XRD), based on similarity of caculation on public peaks by MATLAB software, and the feasibility of new dairy technology of microwave method was explored between XRD and the dissolution rate in artificial simulation gastric juices. The result showed that similarity of shared peak in XRD of conventional dairy Nanhanshuishi was > 95%, This XRD characteristic fingerprint of conventional dairy Nanhanshuishi had strong specificity, could be used to provide a reference for identification and quality evaluation. This study also showed that the similarity of microware dairy products and conventional dairy products was good, and the sample of microwave 15 min was the best, and new dairy method by the microwave could replace the traditional method.

The angiographic features of exercise-induced ST-segment elevation in patients without myocardial infarction / 中华心血管病杂志

<p><b>OBJECTIVE</b>To explore the incidence and angiographic features of exercise-induced ST-segment elevation in patients without prior myocardial infarction.</p><p><b>METHODS</b>Exercise-induced ST-segment elevation occurred in 15 out of 4601 consecutive patients without prior myocardial infarction underwent treadmill exercise testing during a 2-year period. The coronary angiographic features of the 15 patients (13 males, aged between 40 - 75 years) were analyzed.</p><p><b>RESULTS</b>Coronary angiography revealed one hemodynamically relevant stenotic vessel in 6 patients, two hemodynamically relevant stenotic vessels in 6 patients, three hemodynamically relevant stenotic vessels in 3 patients. Left anterior descending (LAD) coronary artery was affected in 12 patients. Left main coronary artery (LMCA) stenosis was evidenced in 1 patient and right coronary artery stenosis in 7 patients. Severe (90% - 100%) occlusions were visualized in 8 out of 13 patients with LAD or LMCA lesions. Elevated ST-segment leads were consistent with the ischemic area where the blood supply of myocardium was affected by diseased vessels.</p><p><b>CONCLUSIONS</b>The incidence of exercise induced ST-segment elevation in patients without prior myocardial infarction is very low and mostly due to severe fixed coronary artery stenosis, especially in LAD. The location of ischemic myocardium can be suggested by ST-segment elevation leads during exercise.</p>