Composite oxide catalysts Eu/TiO 2, Ce/TiO 2, Y/TiO 2 (RE/TiO 2) were prep ared by impregnation method and characterized by means of UV-Vis spectroscopy, TEM and BET. The results indicate that the size of TiO 2 ...Composite oxide catalysts Eu/TiO 2, Ce/TiO 2, Y/TiO 2 (RE/TiO 2) were prep ared by impregnation method and characterized by means of UV-Vis spectroscopy, TEM and BET. The results indicate that the size of TiO 2 has different effect o n the modification effic iency. The catalytic activity of micron scale TiO 2 increases by 136% and 59% o w ing to the addition of Y and Ce, respectively, while the catalytic activity of n anoscale TiO 2 decreases due to the doping of Y and Ce.展开更多
Manganese-containing superoxide dismutase (Mn-SOD) activity in lung cancer tissues from 5 patients with pulmonary carcinoma were measured by the nitrite formation method, lipid peroxide (LPO) values being measured by ...Manganese-containing superoxide dismutase (Mn-SOD) activity in lung cancer tissues from 5 patients with pulmonary carcinoma were measured by the nitrite formation method, lipid peroxide (LPO) values being measured by spectrophotometry of thio-barbituric acid reaction. The results obtained show that Mn-SOD activity exhibits most evidently in lung cancer tissues, less evidently in peripheral tissues around the lung cancer, but the least in normal peripheral lung tissues, indicating a declined tendency as definitely proved by statistical treatment (P<0.01). In addition, LPO values are found to be lower in lung cancer tissues than those in normal peripheral tissues.展开更多
The complex Fe(aapo)2Cl3 with chemical formula C14H16Cl3FeN4O4 was obtained by the reaction of FeCl36H2O with apoHCl (apo = 2璦mino pyridine N璷xide) in acetonitrile. The result shows that CH3CN has been hydrolysised ...The complex Fe(aapo)2Cl3 with chemical formula C14H16Cl3FeN4O4 was obtained by the reaction of FeCl36H2O with apoHCl (apo = 2璦mino pyridine N璷xide) in acetonitrile. The result shows that CH3CN has been hydrolysised with the water from FeCl36H2O dissolving, and then the hydrolysised product condenses with apo to give aapo. A single-crystal X璻ay study of Fe(aapo)2Cl3 shows it belongs to the monoclinic system, space group C2/c with a = 15.873(3), b = 10.322(2), c = 11.987(2) ? b = 106.35(1), V = 1884.5(6) 3, Z = 4, Mr = 466.51, Dc = 1.644 g/cm3, m(MoKa) = 1.253 mm-1, F(000) = 948, R = 0.0377 and wR = 0.0749 for 1262 observed reflections with I > 2(I). Fe (Ⅲ) is coordinated by a trigonal bipyramidal geometry with three chlorine atoms lying on the equatorial plane and two oxygen atoms connected with the nitrogen atoms of pyridine rings occupying the axial positions, while the iron and Cl(1) atoms lie on the crystallographic 2-fold axis. The dihedral angle of two pyridine rings is 71.74(9). There exist N(2)H(2)…O(1)?hydrogen bonds in the crystal structure.展开更多
文摘Composite oxide catalysts Eu/TiO 2, Ce/TiO 2, Y/TiO 2 (RE/TiO 2) were prep ared by impregnation method and characterized by means of UV-Vis spectroscopy, TEM and BET. The results indicate that the size of TiO 2 has different effect o n the modification effic iency. The catalytic activity of micron scale TiO 2 increases by 136% and 59% o w ing to the addition of Y and Ce, respectively, while the catalytic activity of n anoscale TiO 2 decreases due to the doping of Y and Ce.
文摘Manganese-containing superoxide dismutase (Mn-SOD) activity in lung cancer tissues from 5 patients with pulmonary carcinoma were measured by the nitrite formation method, lipid peroxide (LPO) values being measured by spectrophotometry of thio-barbituric acid reaction. The results obtained show that Mn-SOD activity exhibits most evidently in lung cancer tissues, less evidently in peripheral tissues around the lung cancer, but the least in normal peripheral lung tissues, indicating a declined tendency as definitely proved by statistical treatment (P<0.01). In addition, LPO values are found to be lower in lung cancer tissues than those in normal peripheral tissues.
基金the Natural Science Foundation of Xuzhou Normal University (01BXL009)
文摘The complex Fe(aapo)2Cl3 with chemical formula C14H16Cl3FeN4O4 was obtained by the reaction of FeCl36H2O with apoHCl (apo = 2璦mino pyridine N璷xide) in acetonitrile. The result shows that CH3CN has been hydrolysised with the water from FeCl36H2O dissolving, and then the hydrolysised product condenses with apo to give aapo. A single-crystal X璻ay study of Fe(aapo)2Cl3 shows it belongs to the monoclinic system, space group C2/c with a = 15.873(3), b = 10.322(2), c = 11.987(2) ? b = 106.35(1), V = 1884.5(6) 3, Z = 4, Mr = 466.51, Dc = 1.644 g/cm3, m(MoKa) = 1.253 mm-1, F(000) = 948, R = 0.0377 and wR = 0.0749 for 1262 observed reflections with I > 2(I). Fe (Ⅲ) is coordinated by a trigonal bipyramidal geometry with three chlorine atoms lying on the equatorial plane and two oxygen atoms connected with the nitrogen atoms of pyridine rings occupying the axial positions, while the iron and Cl(1) atoms lie on the crystallographic 2-fold axis. The dihedral angle of two pyridine rings is 71.74(9). There exist N(2)H(2)…O(1)?hydrogen bonds in the crystal structure.
