目的研究复方健耳剂对小鼠耳蜗组织超氧化物歧化酶(SOD)1表达的影响,探讨其预防老年性耳蜗感音神经性损害机制。方法选择断奶DBA/2J小鼠10只,随机分为对照组和中药组各5只,对照组小鼠为常规饲料与日常饮水喂养;中药组小鼠为常规饲料与...目的研究复方健耳剂对小鼠耳蜗组织超氧化物歧化酶(SOD)1表达的影响,探讨其预防老年性耳蜗感音神经性损害机制。方法选择断奶DBA/2J小鼠10只,随机分为对照组和中药组各5只,对照组小鼠为常规饲料与日常饮水喂养;中药组小鼠为常规饲料与中药溶液喂养;至4.3月龄时两组同时终止实验,取出耳蜗,利用Real Time PCR技术定量检测两组耳蜗组织SOD1的表达。结果中药组SOD1的表达比对照组高(P<0.05)。结论复方健耳剂通过对SOD1的表达影响可能是其有效对抗老年性耳蜗感音神经性损害的重要机制之一。展开更多
We report on the observation of the Josephson effect on the newly discovered superconductor MgB_(2) with the breakjunction technique. Similar to conventional superconductors, the I-V curve can be fitted with the resis...We report on the observation of the Josephson effect on the newly discovered superconductor MgB_(2) with the breakjunction technique. Similar to conventional superconductors, the I-V curve can be fitted with the resistively shunted junction model including the noise effect, and a large characteristic voltage V_(c)= I_(c)R_(N) = 9.6meV was obtained. The energy gap determined by the Ambegaokar-Baratoff relation with the fitted Vc is very consistent with the Bardeen-Cooper-Schrieffer weak-coupling value. Our result implies that the superconductor MgB_(2) is a promising material for Josephson device applications.展开更多
We report temperature-dependent behavior of the zero bias tunneling conductance(ZBTC),derived from tun neling spectroscopies on as-grown Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi2212)single crystals taken with evaporated Zn and...We report temperature-dependent behavior of the zero bias tunneling conductance(ZBTC),derived from tun neling spectroscopies on as-grown Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi2212)single crystals taken with evaporated Zn and Pb planar junctions.At Tc the measured ZBTC shows a kink which gives an in situ measure of the superconducting transition temperature(T_(c)).Below T_(c),the T^(2)dependence of the ZBTC has been observed repeatedly as a new evidence of the d-wave symmetry in Bi2212.展开更多
文摘目的研究复方健耳剂对小鼠耳蜗组织超氧化物歧化酶(SOD)1表达的影响,探讨其预防老年性耳蜗感音神经性损害机制。方法选择断奶DBA/2J小鼠10只,随机分为对照组和中药组各5只,对照组小鼠为常规饲料与日常饮水喂养;中药组小鼠为常规饲料与中药溶液喂养;至4.3月龄时两组同时终止实验,取出耳蜗,利用Real Time PCR技术定量检测两组耳蜗组织SOD1的表达。结果中药组SOD1的表达比对照组高(P<0.05)。结论复方健耳剂通过对SOD1的表达影响可能是其有效对抗老年性耳蜗感音神经性损害的重要机制之一。
基金Supported by the State Key Program for Basic Research of Chinathe National Center for Research&Development on Superconductivity.
文摘We report on the observation of the Josephson effect on the newly discovered superconductor MgB_(2) with the breakjunction technique. Similar to conventional superconductors, the I-V curve can be fitted with the resistively shunted junction model including the noise effect, and a large characteristic voltage V_(c)= I_(c)R_(N) = 9.6meV was obtained. The energy gap determined by the Ambegaokar-Baratoff relation with the fitted Vc is very consistent with the Bardeen-Cooper-Schrieffer weak-coupling value. Our result implies that the superconductor MgB_(2) is a promising material for Josephson device applications.
基金Supported by a grant for State Key Program for Basic Research of China,and the National Center for Research&Development on Superconductivity.
文摘We report temperature-dependent behavior of the zero bias tunneling conductance(ZBTC),derived from tun neling spectroscopies on as-grown Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi2212)single crystals taken with evaporated Zn and Pb planar junctions.At Tc the measured ZBTC shows a kink which gives an in situ measure of the superconducting transition temperature(T_(c)).Below T_(c),the T^(2)dependence of the ZBTC has been observed repeatedly as a new evidence of the d-wave symmetry in Bi2212.
