[Variational Trend and Characteristics of Air Pollution in Baoding City].

To understand the trends and characteristics of air pollution in Baoding in recent years, an analysis of air quality and air pollutant concentrations in Baoding from 2013 to 2018 was carried out. The results showed that: 1 from 2013 to 2018, the comprehensive index of Baoding dropped from 11.6 to 6.6, the days of severe pollution decreased from 114 days to 27 days, and cumulative concentration of pollutants during severe pollution decreased from 57.34% to 20.59%. This indicated that the air quality of Baoding city has improved year on year from 2013 to 2018. Not only has the number of heavy pollution days and the annual average concentration of pollutants decreased, but also the proportion of cumulative concentrations of pollutants during heavy pollution has decreased. the difference between the average concentration level of Baoding city and "2+26" Cities is getting smaller and smaller. ② Summer ρ(O3-8h) increased year on year. In 2017 and 2018, the heavy pollution days caused by O3 accounted for 17.0% and 14.8% of the heavy pollution days of the year, respectively, and the ozone pollution gradually became prominent; the characteristic value of NO2 in autumn was higher than that of SO2, CO, PM2.5, and PM10, indicating that the type of pollution in autumn was more motorized. The sources of pollution in winter changed from the partial combustion of coal in 2013-2014 to a mixed influence of partial combustion of coal and incomplete combustion in 2015-2018. ③ In 2016, 2017, and 2018, a high cumulative concentrations of PM2.5 during the high pollution season that accounted for 5.56%, 6.21%, and 2.58% declined as compared to that during the same period in 2015; this was the largest decline among the six pollutants; PM10 followed; The decreases of SO2 and NO2 were small, indicating that the emergency measures were better in cutting peaks of particulate matter than the gaseous pollutants during heavy pollution in Baoding. In a heavy pollution event during the high pollution season in 2018, partial-burning coal-type pollution increased as compared to that during the high pollution season in 2017, indicating that the coal combustion was still one of the pollution sources that Baoding city needed to control. In summary, Baoding should strengthen the management and control of motor vehicles in autumn, and gradually change from the original coal control measures to a combination of coal control and diesel control in winter; in the future, the focus of air pollution prevention and control should be strengthened toward O3 pollution.

Therapeutic effects of hydrogen saturated saline on rat diabetic model and insulin resistant model via reduction of oxidative stress / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Molecular hydrogen, as a novel antioxidant, has been proven effective in treating many diseases. This study aimed to evaluate the therapeutic effects of hydrogen saturated saline in treatment of a rat model of diabetes mellitus and a rat model of insulin resistant.</p><p><b>METHODS</b>A rat diabetes mellitus model was established by feeding a high fat/high carbohydrate diet followed by injection of a small dose of streptozotocin, and an insulin resistant model was induced with a high glucose and high fat diet. Hydrogen saturated saline was administered to rats with both models conditions on a daily basis for eight weeks. A pioglitazone-treated group and normal saline-treated group served as positive and negative controls. The general condition, body weight, blood glucose, blood lipids, and serum insulin levels of rats were examined at the 8th week after treatment. The oxidative stress indices, including serum superoxide dismutase (SOD), glutathione (GSH) and malondialdehyde (MDA) were also evaluated after eight weeks of treatment using the commercial kits.</p><p><b>RESULTS</b>Hydrogen saturated saline showed great efficiency in improving the insulin sensitivity and lowering blood glucose and lipids. Meanwhile, the therapeutic effects of hydrogen saturated saline were superior to those of pioglitazone. Hydrogen saturated saline markedly attenuated the MDA level and elevated the levels of antioxidants SOD and GSH.</p><p><b>CONCLUSION</b>Hydrogen saturated saline may improve the insulin resistance and alleviate the symptoms of diabetes mellitus by reducing the oxidative stress and enhancing the anti-oxidant system.</p>

Clinical and imaging diagnosis of intracranial venous sinus and cerebral venous thrombosis / 中国康复理论与实践

@#ObjectiveTo study how to diagnose thrombosis of intracranial venous sinus and cerebral venous thrombosis(CVT). Methods6 cases with intracranial venous sinus and CVT were analysed by clinical features and imaging signs. ResultsMost patients had symptoms and signs of intracranial hypertension. Some patients manifested symptoms of whole brain or focal neurological deficits. Magnetic resonance imaging (MRI) and magnetic resonance venography (MRV) play important roles for the diagnosis of intracranial venous sinus and CVT, however, digital subtraction angiography (DSA) is one of the most reliable method for early diagnosis of the above diseases.Conclusions According to clinical features and imaging signs, intracranial venous sinus and CVT could be diagnosed accurately .