The hydrological character parameters of the litter amount, the maximum water capacity and water absorption speed of the litter on the forest land under four type of \%Abies fabri\% forest (young, half_mature,mature a...The hydrological character parameters of the litter amount, the maximum water capacity and water absorption speed of the litter on the forest land under four type of \%Abies fabri\% forest (young, half_mature,mature and overmature stand)on the Gongga Mountain were studied in this paper. The result showed that the litter amount under the overmature stand was the maximum(67 8?t·hm -2 ), the second was the mature stand(53 4 t·hm -2 ), the third was the half mature stand(40 4 t·hm -2 ), the fourth was the young stand(32 6?t·hm -2 ). The maximum water capacity of the undecomposed litter under the mature stand was 428 8% of the litter’s dry weight, that of the litter under the overmature stand was 411 6%, that of the litter under the half_mature stand was 378 8%, that of the litter under the young stand was 296 7%. The maximum water capacity of the half_decomposed litter under the mature stand was 234 5% of the litter’s dry weight, that of the litter under the overmature stand was 175 6%, that of the litter under the half mature stand was 160 3%, that of the litter under the young stand was 132 5%. The equation between the water absorption speed of the litter and the soaked time is S=kt n. The result also shows that the litter’s variation with the time has no relation to forest age, while its decomposition degree is positively related to stand age.展开更多
目的:评估保留自主呼吸的喉罩全麻在单孔胸腔镜下肺叶切除术中应用的可行性。方法:喉罩组与双腔支气管组各20例肺占位行胸腔镜肺叶切除术淋巴结清扫术患者。两组均行肋间神经阻滞,术中喉罩组不使用肌松药,保留自主呼吸;双腔管组使用肌松...目的:评估保留自主呼吸的喉罩全麻在单孔胸腔镜下肺叶切除术中应用的可行性。方法:喉罩组与双腔支气管组各20例肺占位行胸腔镜肺叶切除术淋巴结清扫术患者。两组均行肋间神经阻滞,术中喉罩组不使用肌松药,保留自主呼吸;双腔管组使用肌松药,术中行单肺通气。结果:喉罩组与双腔管组在手术时间、术中最低SpO_2、术前、术后1 h PaCO_2无明显差异。喉罩/双腔管放置满意用时、拔管时间、恢复室停留时间、术后住院时间喉罩组均短于双腔管组。插喉罩/双腔管前后,△MAP、△HR喉罩组低于双腔管组。术中每千克体重舒芬太尼、丙泊酚用量喉罩组显著少于双腔管组。肺叶切除后血气PaCO_2、术中最高PETCO_2,喉罩组显著高于双腔管组。术后咽喉痛发生率、住院总费用喉罩组低于双腔管组。结论:保留自主呼吸的喉罩全麻用于胸腔镜肺叶切除术具有明显优势。展开更多
文摘The hydrological character parameters of the litter amount, the maximum water capacity and water absorption speed of the litter on the forest land under four type of \%Abies fabri\% forest (young, half_mature,mature and overmature stand)on the Gongga Mountain were studied in this paper. The result showed that the litter amount under the overmature stand was the maximum(67 8?t·hm -2 ), the second was the mature stand(53 4 t·hm -2 ), the third was the half mature stand(40 4 t·hm -2 ), the fourth was the young stand(32 6?t·hm -2 ). The maximum water capacity of the undecomposed litter under the mature stand was 428 8% of the litter’s dry weight, that of the litter under the overmature stand was 411 6%, that of the litter under the half_mature stand was 378 8%, that of the litter under the young stand was 296 7%. The maximum water capacity of the half_decomposed litter under the mature stand was 234 5% of the litter’s dry weight, that of the litter under the overmature stand was 175 6%, that of the litter under the half mature stand was 160 3%, that of the litter under the young stand was 132 5%. The equation between the water absorption speed of the litter and the soaked time is S=kt n. The result also shows that the litter’s variation with the time has no relation to forest age, while its decomposition degree is positively related to stand age.
文摘目的:评估保留自主呼吸的喉罩全麻在单孔胸腔镜下肺叶切除术中应用的可行性。方法:喉罩组与双腔支气管组各20例肺占位行胸腔镜肺叶切除术淋巴结清扫术患者。两组均行肋间神经阻滞,术中喉罩组不使用肌松药,保留自主呼吸;双腔管组使用肌松药,术中行单肺通气。结果:喉罩组与双腔管组在手术时间、术中最低SpO_2、术前、术后1 h PaCO_2无明显差异。喉罩/双腔管放置满意用时、拔管时间、恢复室停留时间、术后住院时间喉罩组均短于双腔管组。插喉罩/双腔管前后,△MAP、△HR喉罩组低于双腔管组。术中每千克体重舒芬太尼、丙泊酚用量喉罩组显著少于双腔管组。肺叶切除后血气PaCO_2、术中最高PETCO_2,喉罩组显著高于双腔管组。术后咽喉痛发生率、住院总费用喉罩组低于双腔管组。结论:保留自主呼吸的喉罩全麻用于胸腔镜肺叶切除术具有明显优势。
