Preventing the nitrate and nitrite pollution of vegetable have an important value to ensure the public health. The content of nitrate and nitrite in vegetable is not only controlled by fertilization and management in produce. But correlated with handling process after collection. Based on the past document this paper play emphasis on the change trend and the cause of nitrate and nitrite content in vegetable during the process of storage, boiled water poaching,immersing,machining and so on. Finally give some advice on improving current research.

Objective To investigate the effect of long-term cardiac rehabilitation on risk factors with doctor supervision after percutaneous coronary intervention(PCI). Methods One hundred and twelve patients after PCI were divided into the cardiac rehabilitation group(56 cases) and the control group (56 cases). All of the patients were given medication and health education, meanwhile the cardiac rehabilitation group received 4～6 weeks hospitalized cardiac rehabilitation program and one year ambulatory cardiac rehabilitation with doctor supervision. Risk factors were assessed six mouths and twelve mouths after the treatment. Results The risk factors except diastolic blood pressure and body weight index improved more significantly in the cardiac rehabilitation group than in the control group. Clinical event in the cardiac rehabilitation group is lower than in the control group. Conclusion Long-term cardiac rehabilitation with doctor supervision is safe, efficiency and good compliance to improve risk factors of coronary heart disease after PCI except diastolic blood pressure and weight management.

[ ABSTRACT] AIM:To study the effect of livin gene-modified bone marrow mesenchymal stem cells ( BM-MSCs) transplantation on the cardiac function following acute myocardial infarction in a rat model and the expression of livin , caspase-3, caspase-7 and caspase-9 in the livin gene-modified BM-MSCs.METHODS: The MSCs were obtained by the whole bone marrow culture method , and the apoptosis of the MSCs after infection with adenovirus vector carrying enhanced green fluorescent protein ( EGFP) gene and livin recombinant vector ( rAd-livin) were detected by flow cytometry .The ex-pression of livin, caspase-3, caspase-7 and caspase-9 was detected by Western blot .After permanent left anterior descend-ing artery occlusion , the rats were randomized to receive intramyocardial injection of DMEM without cells ( vehicle group ) , or containing MSCs ( MSCs group ) , MSCs ( EGFP ) ( rAd-control/MSCs group ) or MSCs ( livin ) ( rAd-livin/MSCs group).Left ventricular systolic pressure (LVSP), left ventricular end-diastolic pressure (LVEDP), the maximum in-creased rate of left ventricular pressure ( -dp/dtmax ) and the maximum decline rate of left ventricular pressure ( +dp/dtmax ) were recorded for evaluating the cardiac functions .RESULTS: The apoptosis of rAd-livin/MSCs was significantly decreased as compared with MSCs and rAd-control/MSCs (P<0.05).Meanwhile, the expression of caspase-3, caspase-7 and caspase-9 was significantly downregulated as compared with the other 2 groups ( P<0.05 ) .The cardiac function in rAd-livin/MSCs group was significantly improved as compared with DMEM group , and those in the other 2 groups got the similar results, but the function in rAd-livin/MSCs group was better improved .Meanwhile, the number of surviving cells in rAd-livin/MSCs group was significantly improved as compared with the other 2 groups .CONCLUSION:The apoptosis of MSCs is decreased after rAd-livin transfection, and the expression of caspase-3, caspase-7 and caspase-9 is also significant-ly downregulated while the expression of livin is significantly upregulated .Transplantation of livin-modified BM-MSCs by lentiviral vector results in better prognosis for treating myocardial infarction by enhancing cell survival .