目的观察健康女性腰椎投影骨面积(projective bone area,BA)对面积骨密度(areal bonemineral density,aBMD)和骨质疏松(osteoporosis,OP)诊断的影响。方法 1.成都地区健康女性824例,年龄20～80岁,用GE LUNAR公司生产的EXPERT-XL双能X线...目的观察健康女性腰椎投影骨面积(projective bone area,BA)对面积骨密度(areal bonemineral density,aBMD)和骨质疏松(osteoporosis,OP)诊断的影响。方法 1.成都地区健康女性824例,年龄20～80岁,用GE LUNAR公司生产的EXPERT-XL双能X线骨密度仪,测定腰椎正位1-4投射骨面积(BA)、骨矿物含量(bone mineral content,BMC)、面积骨密度(aBMD)。按照WHO推荐的诊断标准:aBMD低于峰值骨2.5个标准差为OP。2.按年龄分为20～39岁、40～59岁、60～80岁3个年龄组。各年龄组按BA大小分成大(large BA group,LBAG)、中(intermediate BA group,IBAG)、小(small BA group,SBAG)3组。3.统计学处理:用SPSS13.0统计软件,BA与BMC和aBMD的相关性用pearson相关分析;不同年龄组不同BA组腰椎BMC、aBMD比较用方差分析,OP检出率差异比较用卡方检验。结果 1.BA与BMC(r=0.768P<0.01)和aBMD呈正相关(r=0.171P<0.01);2.20～39岁、40～59岁、60～80岁不同BA组BMC、BMD比较均为:LBAG>IBAG>SBAG,差异有统计学意义(P<0.05)。3.20～39岁不同BA组均无OP检出;40～59岁LBAG、IBAG、SBAG组OP检出率分别为:5.0%、13.5%、18.9%,BA越大,OP检出率越低,差异有统计学意义(P<0.05);60～80岁LBAG、IBAG、SBAG组OP检出率分别为:45.2%、55.8%、64.3%,BA越大,OP检出率越低,差异有统计学意义(P<0.05)。结论成都地区健康女性腰椎BA大者aBMD、BMC较高,OP检出率较低;反之腰椎BA小者,aBMD、BMC较低,OP检出率高。女性40岁后应注意骨质疏松防治。展开更多
Sixty-one patients of ischemic apoplectic hemiplegia were randomly divided into group ofneedling around the ipsilateral projective area on the scalp of the fOcus (group A) and group of scalpacupuncture (group B). Afte...Sixty-one patients of ischemic apoplectic hemiplegia were randomly divided into group ofneedling around the ipsilateral projective area on the scalp of the fOcus (group A) and group of scalpacupuncture (group B). After 30 treatments, there is a significant difference between the therapeuticeffects of two groups (P < 0. 05 ), the former is better than the latter. It suggests that the method ofneedling around the projective area on the scalp of the focus is an effective and a feasible展开更多
Stem respiration is an important part of the activity of a tree and is an important source of CO2 evolution from a forest ecosystem. Presently, no standard methods are available for the accurate estimation of total st...Stem respiration is an important part of the activity of a tree and is an important source of CO2 evolution from a forest ecosystem. Presently, no standard methods are available for the accurate estimation of total stem CO2 efflux from a forest. In the current study, a 33-year-old (by the year 2001) larch (Larix gmelini Rupr.) plantation was measured throughout 2001-2002 to analyze its monthly and seasonal patterns of stem respiration. Stem respiration rate was also measured at different heights, at different daily intervals and any variation in the larch plantation was recorded. The relationship between stem temperature, growth status and respiration rate was analyzed. Higher respiration rates were recorded in upper reaches of the larch tree throughout the season and these were affected partially by temperature difference. Midday depression was found in the diurnal changes in stem respiration. In the morning, but not in the afternoon, stem respiration was positively correlated with stem temperature. The reason for this variation may be attributed to water deficit, which was stronger in the afternoon. In the larch plantation, a maximum 7-fold variation in stem respiration was found. The growth status (such as mean growth rate of stem and canopy projection area) instead of stem temperature difference was positively correlated with this large variation. An S-model (sigmoid curve) or Power model shows the greatest regression of the field data. In the courses of seasonal and annual changes of stem respiration, peak values were observed in July of both years, but substantial interannual differences in magnitude were observed. An exponential model can clearly show this regression of the temperature-respiration relationship. In our results, Q(10) values ranged from 2.22 in 2001 to 3.53 in 2002. Therefore, estimation of total stem CO2 efflux only by a constant Q(10) value may give biased results. More parameters of growth status and water status should be considered for more accurate estimation.展开更多
文摘目的观察健康女性腰椎投影骨面积(projective bone area,BA)对面积骨密度(areal bonemineral density,aBMD)和骨质疏松(osteoporosis,OP)诊断的影响。方法 1.成都地区健康女性824例,年龄20～80岁,用GE LUNAR公司生产的EXPERT-XL双能X线骨密度仪,测定腰椎正位1-4投射骨面积(BA)、骨矿物含量(bone mineral content,BMC)、面积骨密度(aBMD)。按照WHO推荐的诊断标准:aBMD低于峰值骨2.5个标准差为OP。2.按年龄分为20～39岁、40～59岁、60～80岁3个年龄组。各年龄组按BA大小分成大(large BA group,LBAG)、中(intermediate BA group,IBAG)、小(small BA group,SBAG)3组。3.统计学处理:用SPSS13.0统计软件,BA与BMC和aBMD的相关性用pearson相关分析;不同年龄组不同BA组腰椎BMC、aBMD比较用方差分析,OP检出率差异比较用卡方检验。结果 1.BA与BMC(r=0.768P<0.01)和aBMD呈正相关(r=0.171P<0.01);2.20～39岁、40～59岁、60～80岁不同BA组BMC、BMD比较均为:LBAG>IBAG>SBAG,差异有统计学意义(P<0.05)。3.20～39岁不同BA组均无OP检出;40～59岁LBAG、IBAG、SBAG组OP检出率分别为:5.0%、13.5%、18.9%,BA越大,OP检出率越低,差异有统计学意义(P<0.05);60～80岁LBAG、IBAG、SBAG组OP检出率分别为:45.2%、55.8%、64.3%,BA越大,OP检出率越低,差异有统计学意义(P<0.05)。结论成都地区健康女性腰椎BA大者aBMD、BMC较高,OP检出率较低;反之腰椎BA小者,aBMD、BMC较低,OP检出率高。女性40岁后应注意骨质疏松防治。
文摘Sixty-one patients of ischemic apoplectic hemiplegia were randomly divided into group ofneedling around the ipsilateral projective area on the scalp of the fOcus (group A) and group of scalpacupuncture (group B). After 30 treatments, there is a significant difference between the therapeuticeffects of two groups (P < 0. 05 ), the former is better than the latter. It suggests that the method ofneedling around the projective area on the scalp of the focus is an effective and a feasible
文摘Stem respiration is an important part of the activity of a tree and is an important source of CO2 evolution from a forest ecosystem. Presently, no standard methods are available for the accurate estimation of total stem CO2 efflux from a forest. In the current study, a 33-year-old (by the year 2001) larch (Larix gmelini Rupr.) plantation was measured throughout 2001-2002 to analyze its monthly and seasonal patterns of stem respiration. Stem respiration rate was also measured at different heights, at different daily intervals and any variation in the larch plantation was recorded. The relationship between stem temperature, growth status and respiration rate was analyzed. Higher respiration rates were recorded in upper reaches of the larch tree throughout the season and these were affected partially by temperature difference. Midday depression was found in the diurnal changes in stem respiration. In the morning, but not in the afternoon, stem respiration was positively correlated with stem temperature. The reason for this variation may be attributed to water deficit, which was stronger in the afternoon. In the larch plantation, a maximum 7-fold variation in stem respiration was found. The growth status (such as mean growth rate of stem and canopy projection area) instead of stem temperature difference was positively correlated with this large variation. An S-model (sigmoid curve) or Power model shows the greatest regression of the field data. In the courses of seasonal and annual changes of stem respiration, peak values were observed in July of both years, but substantial interannual differences in magnitude were observed. An exponential model can clearly show this regression of the temperature-respiration relationship. In our results, Q(10) values ranged from 2.22 in 2001 to 3.53 in 2002. Therefore, estimation of total stem CO2 efflux only by a constant Q(10) value may give biased results. More parameters of growth status and water status should be considered for more accurate estimation.
