Strong converse inequalities for Meyer–König and Zeller operators

AbstractIn this paper we give the strong converse inequality of type B for Meyer–König and Zeller operators

Effects of electron donor on biological nitrogen removal efficiency and microbial community distribution of anaerobic biological system

Glucose (Glu),methanol (MeOH) and potassium hydrogen phthalate (KHP) were in dividually used as electron donor for anaerobic denitrification of NO3--N and C/N ratio was respectively set as 4∶1 and 10∶1 electron donor for each.The experimental results show that Glu and MeOH have similar total nitrogen (TN) removal rates had which are higher than that of KHP under C/N ratias of both 4∶1 and 10∶1.The TN removal rates with Glu and MeOH as electron donors are higher by 71% than that with KHP at C/N of 4∶1,but the difference decreases to 7% at C/N of 10∶1.For the different electron donors,microbiological communities gave obvious characteristics in their in activated sludge systems,in which the electron donors corresponded to their in dividual advantage anaerobic,nitrifying and denitrifying bacteria,and reflected system difference

A pointwise approximation theorem for linear combinations of Bernstein polynomials

Recently, Z. Ditzian gave an interesting direct estimate for Bernstein polynomials. In this paper we give direct and inverse results of this type for linear combinations of Bernstein polynomials

Traditional Chinese Medicine Shuang Shen Ning Xin Attenuates Myocardial Ischemia/Reperfusion Injury by Preserving of Mitochondrial Function

To investigate the potential cardioprotective effects of Shuang Shen Ning Xin on myocardial ischemia/reperfusion injury. Wistar rats were treated with trimetazidine (10 mg/kg/day, ig), Shuang Shen Ning Xin (22.5, 45 mg/kg/day, ig), or saline for 5 consecutive days. Myocardial ischemia/reperfusion injury was induced by ligation of the left anterior descending coronary artery for 40 min and reperfusion for 120 min on the last day of administration. It is found that Shuang Shen Ning Xin pretreatment markedly decreased infarct size and serum LDH levels, and this observed protection was associated with reduced myocardial oxidative stress and cardiomyocyte apoptosis after myocardial ischemia/reperfusion injury. In addition, further studies on mitochondrial function showed that rats treated with Shuang Shen Ning Xin displayed decreased mitochondrial swelling and cytosolic cytochrome c levels, which were accompanied by a preservation of complex I activities and inhibition of mitochondrial permeability transition. In conclusion, the mitochondrial protective effect of Shuang Shen Ning Xin could be a new mechanism, by which Shuang Shen Ning Xin attenuates myocardial ischemia/reperfusion injury