目的:系统评价生长激素(GH)用于体外受精-胚胎移植(IVF-ET)中子宫内膜发育不良患者的有效性。方法:计算机检索PubMed、Embase、the Cochrane Central Register of controlled Trials、中国生物医学文献数据库、中国期刊全文数据库、维...目的:系统评价生长激素(GH)用于体外受精-胚胎移植(IVF-ET)中子宫内膜发育不良患者的有效性。方法:计算机检索PubMed、Embase、the Cochrane Central Register of controlled Trials、中国生物医学文献数据库、中国期刊全文数据库、维普、万方数据库和谷歌学术搜索引擎,纳入比较GH用于IVF-ET中子宫内膜发育不良患者的随机对照试验(RCT)。由2位研究者独立筛选文献、提取资料和评价质量后,应用Revman5.1软件对数据进行Meta分析。结果:共纳入4篇RCT,268例患者。GH组与未使用GH组比较,子宫内膜类型[OR=6.83,95%CI(2.04,22.88),P=0.002]、内膜厚度[OR=10.62,95%CI(2.97,38.00),P=0.0003]、临床妊娠率[OR=3.37,95%CI(1.82,6.23),P=0.0001]均有统计学差异;而Gn使用量和天数、获卵数、优质胚胎数、移植优质胚胎数、HCG注射日E2值差异均无统计学意义(P>0.05)。结论:IVF-ET子宫内膜发育不良患者在促排卵期辅助使用GH,可改善其子宫内膜容受性,提高临床妊娠率。展开更多
The electrie conductivity of pollen life-force and male flowers of Larix olgensis on condition of low temperature adversity has been respectively measured by means of fluorescent dying method and conductivity method ...The electrie conductivity of pollen life-force and male flowers of Larix olgensis on condition of low temperature adversity has been respectively measured by means of fluorescent dying method and conductivity method in 1992 and 1994. The results indicate that:(1 ) If the same clonal pollen is treated at equal time at different low temperatures, there are significant differences in pollen life-force, the pollen life-force is the largest between O℃aild -3℃, in higher or lower temperature range, the pollen life-force will decrease. The measurement of electric conductivity of male flowers provcs that the low temperature of below -3℃ is the inain reason that the cell membrane is damaged and the pollen.life-force decreases. (2) The same clonal pollen life-force at the saine low temperature will gradually decrease with the increasing of frozen time. Its main reason is that suffocation and losing body fluid result in the damage of cell membrane, the measurement of electric conductivity of male flowers call prove that. (3) If pollen is treated with the same low temperature, the humidity will be the main factor of affecting pollen life-force. (4) There are significant differences in Larix olgensis's resistance against low temperature in its different growth stage, the male flower's resistance of near pollen spreading period is low. (5) The resistance is different within clones. (6) The resistance against low temperature of Larix call be incrcased by means of chemical treatment.展开更多
望高法(Perssler Method)是德国著名林学家普莱斯勒(Pressler.M.R.1855)提出的单株立木材积测定法。所谓望高法是通过测定胸径(Diameter at breast he-ight,简写DBH)和望高h_R(Presslerrefererice height,(1/2)DBH处为望点,望点到树基...望高法(Perssler Method)是德国著名林学家普莱斯勒(Pressler.M.R.1855)提出的单株立木材积测定法。所谓望高法是通过测定胸径(Diameter at breast he-ight,简写DBH)和望高h_R(Presslerrefererice height,(1/2)DBH处为望点,望点到树基的高度为望高)后按下式计算单株立木材积的方法:展开更多
For the first time in this paper the forests of Betula platyphylla in Daxing’an Mountains are Subdivided by phytosociological methods. Three community types of B. platyphylla forest have been differentiated, e.g., Rh...For the first time in this paper the forests of Betula platyphylla in Daxing’an Mountains are Subdivided by phytosociological methods. Three community types of B. platyphylla forest have been differentiated, e.g., Rhododendron dahuricum-Betula platyphylla Corylus, Corylus heterophylla-Betula platyphylla community and Arternisia stolonifera-Betula platyphylla community. The distributed elevation, stand height, differential species, major composition species of tree layer, shrub layer and herb layer for each community were detail展开更多
文摘目的:系统评价生长激素(GH)用于体外受精-胚胎移植(IVF-ET)中子宫内膜发育不良患者的有效性。方法:计算机检索PubMed、Embase、the Cochrane Central Register of controlled Trials、中国生物医学文献数据库、中国期刊全文数据库、维普、万方数据库和谷歌学术搜索引擎,纳入比较GH用于IVF-ET中子宫内膜发育不良患者的随机对照试验(RCT)。由2位研究者独立筛选文献、提取资料和评价质量后,应用Revman5.1软件对数据进行Meta分析。结果:共纳入4篇RCT,268例患者。GH组与未使用GH组比较,子宫内膜类型[OR=6.83,95%CI(2.04,22.88),P=0.002]、内膜厚度[OR=10.62,95%CI(2.97,38.00),P=0.0003]、临床妊娠率[OR=3.37,95%CI(1.82,6.23),P=0.0001]均有统计学差异;而Gn使用量和天数、获卵数、优质胚胎数、移植优质胚胎数、HCG注射日E2值差异均无统计学意义(P>0.05)。结论:IVF-ET子宫内膜发育不良患者在促排卵期辅助使用GH,可改善其子宫内膜容受性,提高临床妊娠率。
文摘The electrie conductivity of pollen life-force and male flowers of Larix olgensis on condition of low temperature adversity has been respectively measured by means of fluorescent dying method and conductivity method in 1992 and 1994. The results indicate that:(1 ) If the same clonal pollen is treated at equal time at different low temperatures, there are significant differences in pollen life-force, the pollen life-force is the largest between O℃aild -3℃, in higher or lower temperature range, the pollen life-force will decrease. The measurement of electric conductivity of male flowers provcs that the low temperature of below -3℃ is the inain reason that the cell membrane is damaged and the pollen.life-force decreases. (2) The same clonal pollen life-force at the saine low temperature will gradually decrease with the increasing of frozen time. Its main reason is that suffocation and losing body fluid result in the damage of cell membrane, the measurement of electric conductivity of male flowers call prove that. (3) If pollen is treated with the same low temperature, the humidity will be the main factor of affecting pollen life-force. (4) There are significant differences in Larix olgensis's resistance against low temperature in its different growth stage, the male flower's resistance of near pollen spreading period is low. (5) The resistance is different within clones. (6) The resistance against low temperature of Larix call be incrcased by means of chemical treatment.
文摘望高法(Perssler Method)是德国著名林学家普莱斯勒(Pressler.M.R.1855)提出的单株立木材积测定法。所谓望高法是通过测定胸径(Diameter at breast he-ight,简写DBH)和望高h_R(Presslerrefererice height,(1/2)DBH处为望点,望点到树基的高度为望高)后按下式计算单株立木材积的方法:
文摘For the first time in this paper the forests of Betula platyphylla in Daxing’an Mountains are Subdivided by phytosociological methods. Three community types of B. platyphylla forest have been differentiated, e.g., Rhododendron dahuricum-Betula platyphylla Corylus, Corylus heterophylla-Betula platyphylla community and Arternisia stolonifera-Betula platyphylla community. The distributed elevation, stand height, differential species, major composition species of tree layer, shrub layer and herb layer for each community were detail
