A survey of 35 tree species （belonging to 28 genera in 19 families） in Aliyar, South India was carried out to ascertain their arbuscular mycorrhizal （AM） and dark septate endophyte （DSE） fungal status. All the t...A survey of 35 tree species （belonging to 28 genera in 19 families） in Aliyar, South India was carried out to ascertain their arbuscular mycorrhizal （AM） and dark septate endophyte （DSE） fungal status. All the tree species examined had AM association. AM and DSE coloni- zation is reported for the first time in 20 and 14 species respectively. Co- occurrence of AM and DSE was observed in 14 （40%） tree species. The extent of DSE colonization was inversely related to the extent of AM fungal colonization. Six tree species had Arum-type, 18 had intermediate- type and 11 had typical Paris-type AM morphology. AM fungal spore morphotypes belonging to 11 species in two genera were isolated from the rhizosphere soil. AM fungal spore numbers were not related to the ex- tent of AM colonization and Glomus dominated spore diversity. AM association individually and along with DSE were found respectively in the 63% and 44% of the economically important tree species. The occur- rence of AM and DSE fungal association in economically important indigenous tree species indicates the possibility of exploiting this asso- ciation in future conservation programmes of these species.展开更多
目的对87例显性房室旁路及26例隐匿性房室旁路患者导管射频消融术前后体表心电图 QRS 波终末40 ms 的向量变化进行分析,探讨预激综合征对心室除极终末向量的影响。方法选择经射频消融术证实的显性单房室旁路87例及隐匿性单房室旁路26例...目的对87例显性房室旁路及26例隐匿性房室旁路患者导管射频消融术前后体表心电图 QRS 波终末40 ms 的向量变化进行分析,探讨预激综合征对心室除极终末向量的影响。方法选择经射频消融术证实的显性单房室旁路87例及隐匿性单房室旁路26例患者,经临床常规检查无器质性心脏病。将房室旁路分为间隔、左后游离壁、左前游离壁、右后游离壁及右前游离壁房室旁路。结果87例显性房室旁路中的72例患者导管射频消融术后终末向量发生改变,15例无变化,26例隐匿房室旁路中的2例患者导管射频消融术后终末向量发生改变,24例无变化,显性房室旁路与隐匿房室旁路相比差异有显著性(P<0.05),不同部位间的显性房室旁路相比差异无显著性(P>0.05)。显性房室旁路终末向量的变化特点具有导联的特异性,后间隔房室旁路主要表现Ⅱ、Ⅲ、aVF 导联 S 波变浅或消失及 V_2～V_4导联原有 S 波加深或新出现 S 波,中间隔房室旁路表现 V_2～V_4导联原有 S 波加深或新出现 S 波,前间隔房室旁路表现Ⅰ、aVL 导联新出现 S 波及 V_4导联原有 S 波加深,左后游离壁房室旁路表现Ⅰ、aVL 导联新出现 S 波及 V_1～V_4导联原有 S 波加深或新出现 S 波,左前游离壁房室旁路表现Ⅱ、Ⅲ、aVF导联 S 波变浅或消失及 V_1～V_4导联原有 S 波加深或新出现 S 波,右后游离壁房室旁路表现 V_2～V_4导联原有 S 波加深或新出现 S 波,右前游离壁房室旁路表现Ⅱ、Ⅲ、aVF 导联 S 波加深及 V_4导联 S 波加深或新出现 S 波。结论任何部位显性房室旁路均可引起 QRS 波终末向量的改变,这种改变有导联的特异性。提示预激综合征不但影响 QRS 起始向量的改变,也可导致 QRS 终末向量的改变。展开更多
The numerical method of pricing up-and-out call Parision Option based on the Black-Scholes model is focused in this article. The two-point compact scheme with second-order accuracy is used. A technique to remove the s...The numerical method of pricing up-and-out call Parision Option based on the Black-Scholes model is focused in this article. The two-point compact scheme with second-order accuracy is used. A technique to remove the singularity of the pay-offf unction is used to make the result more accurate,more effective and more stable.The influence of the delaying time and the barrier on the option price is discussed.展开更多
文摘A survey of 35 tree species （belonging to 28 genera in 19 families） in Aliyar, South India was carried out to ascertain their arbuscular mycorrhizal （AM） and dark septate endophyte （DSE） fungal status. All the tree species examined had AM association. AM and DSE coloni- zation is reported for the first time in 20 and 14 species respectively. Co- occurrence of AM and DSE was observed in 14 （40%） tree species. The extent of DSE colonization was inversely related to the extent of AM fungal colonization. Six tree species had Arum-type, 18 had intermediate- type and 11 had typical Paris-type AM morphology. AM fungal spore morphotypes belonging to 11 species in two genera were isolated from the rhizosphere soil. AM fungal spore numbers were not related to the ex- tent of AM colonization and Glomus dominated spore diversity. AM association individually and along with DSE were found respectively in the 63% and 44% of the economically important tree species. The occur- rence of AM and DSE fungal association in economically important indigenous tree species indicates the possibility of exploiting this asso- ciation in future conservation programmes of these species.
文摘目的对87例显性房室旁路及26例隐匿性房室旁路患者导管射频消融术前后体表心电图 QRS 波终末40 ms 的向量变化进行分析,探讨预激综合征对心室除极终末向量的影响。方法选择经射频消融术证实的显性单房室旁路87例及隐匿性单房室旁路26例患者,经临床常规检查无器质性心脏病。将房室旁路分为间隔、左后游离壁、左前游离壁、右后游离壁及右前游离壁房室旁路。结果87例显性房室旁路中的72例患者导管射频消融术后终末向量发生改变,15例无变化,26例隐匿房室旁路中的2例患者导管射频消融术后终末向量发生改变,24例无变化,显性房室旁路与隐匿房室旁路相比差异有显著性(P<0.05),不同部位间的显性房室旁路相比差异无显著性(P>0.05)。显性房室旁路终末向量的变化特点具有导联的特异性,后间隔房室旁路主要表现Ⅱ、Ⅲ、aVF 导联 S 波变浅或消失及 V_2～V_4导联原有 S 波加深或新出现 S 波,中间隔房室旁路表现 V_2～V_4导联原有 S 波加深或新出现 S 波,前间隔房室旁路表现Ⅰ、aVL 导联新出现 S 波及 V_4导联原有 S 波加深,左后游离壁房室旁路表现Ⅰ、aVL 导联新出现 S 波及 V_1～V_4导联原有 S 波加深或新出现 S 波,左前游离壁房室旁路表现Ⅱ、Ⅲ、aVF导联 S 波变浅或消失及 V_1～V_4导联原有 S 波加深或新出现 S 波,右后游离壁房室旁路表现 V_2～V_4导联原有 S 波加深或新出现 S 波,右前游离壁房室旁路表现Ⅱ、Ⅲ、aVF 导联 S 波加深及 V_4导联 S 波加深或新出现 S 波。结论任何部位显性房室旁路均可引起 QRS 波终末向量的改变,这种改变有导联的特异性。提示预激综合征不但影响 QRS 起始向量的改变,也可导致 QRS 终末向量的改变。
文摘The numerical method of pricing up-and-out call Parision Option based on the Black-Scholes model is focused in this article. The two-point compact scheme with second-order accuracy is used. A technique to remove the singularity of the pay-offf unction is used to make the result more accurate,more effective and more stable.The influence of the delaying time and the barrier on the option price is discussed.
