With globe warming, road safety will change dramatically, especially within the Qinghai-Tibet Plateau permafrost regions. Because of higher elevation and better almospheric transparency, the Qinghai-Tibet Plateau has ...With globe warming, road safety will change dramatically, especially within the Qinghai-Tibet Plateau permafrost regions. Because of higher elevation and better almospheric transparency, the Qinghai-Tibet Plateau has stronger radiation than other regions, which can change the daily variation of ground surface temperature on the Plateau. The awning measure （shading board） is one of the actively protected permafrost measures, which was adopted along the Qinghai-Tibet railway and highway and the Qing-Kang Highway in China. Field test results show that embankment surface month mean net radiation is 60-130 W/m2, but the value is below 20 W/m2 under the shading board, and the reducing level of naRn-al net radiation is 80%-90%. The shading board reduced the heat flow entering into the embankment by 80%,90% or more, with heat entering into the soil on the common embankment, but emitting from the embankment under the shading board. At the same time, ground surface temperature under the shading board is 6-8 ℃ lower than the exposed embankment. Test results show that the shading board measure can rapidly and effectively reduce net radiation and heat flow into the embankment, decrease embankment surface and interior temperature, effectively delay increase rate of soil temperature under globe warming, ensure stability and safety of the embankment, and guarantee unblocked road projects in cold and permafrost regions.展开更多
Wheat awns contribute to photosynthesis and grain production.In this study,an F2population and F2:3families from a cross between the awned line 7D12 and the Chinese awnless variety Shiyou 20(SY20)were used to identify...Wheat awns contribute to photosynthesis and grain production.In this study,an F2population and F2:3families from a cross between the awned line 7D12 and the Chinese awnless variety Shiyou 20(SY20)were used to identify loci associated with awn length.Bulked-segregant RNA sequencing and linkage mapping identified a single dominant locus in a 0.3 cM interval on chromosome 5AL.Five genes were in the interval,including the recently cloned awn inhibitor B1.Although a single copy of the B1 gene was detected in 7D12,SY20 carried five copies of the gene.Increased copy number of B1 in SY20enhanced gene expression.Based on sequence variation among the promoter regions of five B1 gene copies in SY20,two dominant markers were developed and found to cosegregate with B1 in a population of 931 wheat accessions.All 77 awnless accessions harbored sequence variations in the B1 promoter regions similar to those of SY20 and thus carried multiple copies of the gene,whereas 15 randomly selected awned wheats carried only one copy.These results suggest that an increase in copy number of the B1 gene is associated with inhibition of awn length.展开更多
In this paper, the effect of the thermosiphon, insulation board and awning in cooling the permafrost roadbed base was simulated numerically. The computed results were analysed and compared, some practical conclusion w...In this paper, the effect of the thermosiphon, insulation board and awning in cooling the permafrost roadbed base was simulated numerically. The computed results were analysed and compared, some practical conclusion were presented.展开更多
芒是麦类作物穂部器官的重要组成部分,在提高籽粒产量、促进种子传播和防御虫害等方面具有重要作用。大麦具有丰富的芒型突变体,加之其二倍体的特性,成为麦类作物芒器官形态建成研究的理想作物。本研究报道了一个大麦芒型突变体材料calc...芒是麦类作物穂部器官的重要组成部分,在提高籽粒产量、促进种子传播和防御虫害等方面具有重要作用。大麦具有丰富的芒型突变体,加之其二倍体的特性,成为麦类作物芒器官形态建成研究的理想作物。本研究报道了一个大麦芒型突变体材料calcaroides,表现为外稃顶端或是稃芒基部异形凸起,形成呈钩状不完全花器结构,属基部钩芒类型。突变体芒较短并伴随抽穗期推迟,株高、穗长和穗粒数显著降低等表型。遗传分析表明,突变体的芒型突变性状受单隐性基因cal-d控制。前期利用cal-d导入系BW106×Bowman的F_(2)群体,结合简化基因组测序(GBS,genotyping by sequencing)分析,将cal-d基因初步定位于3H染色体。进一步利用来自F_(2)的杂合单株,包括13000株单株的F_(2:3)群体进行精细定位,最终将cal-d基因定位于3H染色体153~329 Mb区间的近着丝粒区域。通过转录组混池测序分析结合大麦基因组和表达谱资源数据库,初步筛选了9个候选基因。本研究结果为大麦芒型突变基因cal-d的克隆与功能验证奠定了基础,对于解析麦类作物芒的遗传发育机制具有重要的意义。展开更多
Objective:To evaluate the intervention effect of awn needle in the treatment of lumbar disc herniation through meta-analysis.Methods:In CNKI,Wanfang Data,PubMed,VIP and other databases,we searched the clinical observa...Objective:To evaluate the intervention effect of awn needle in the treatment of lumbar disc herniation through meta-analysis.Methods:In CNKI,Wanfang Data,PubMed,VIP and other databases,we searched the clinical observation studies on the treatment of patients with lumbar disc herniation with awn needle.The methodological quality of the included studies was evaluated using Cochrane 5.1.0 bias risk assessment criteria and Jadad scale.Revman 5.3 software was used for meta-analysis.Results:A total of 14 randomized controlled trials involving 1186 patients were included,with 595 in the awn needle treatment group and 591 in the control group.Meta-analysis showed that the awn needle treatment group was better than that of the control group in the total effective rate[RR=1.17;95%CI(1.12,1.22);Z=6.66;P<0.00001];the awn needle treatment group was better than the control group in ameliorating VAS score[WMD=-1.07,95%CI(-1.19,-0.95),Z=17.87,P<0.00001];the awn needle treatment group was better than the control group in ameliorating JOA score[WMD=3.18,95%CI(2.64,3.71),Z=11.57,P<0.00001];the awn needle treatment group was better than the control group in the amelioration of ADL score[SMD=2.44,95%CI(0.54,4.35),Z=2.52,P=0.01];the awn needle treatment group was better than the control group in the improvement of SLRT angle[WMD=12.71,95%CI(3.21,22.21),Z=2.62,P=0.009].Conclusion:Awn needle treatment can improve the total effective rate of patients with lumbar disc herniation,relieve the pain of patients,improve the straight leg elevation angle of patients,alleviate the disease development,relieve the symptoms,and improve the quality of life of patients.It is worthy of clinical application.展开更多
基金supported by the Funds of the State Key Laboratory of Frozen Soils Engineering,CAS(Grant No. SKLFSE-ZY-03)the National Key Natural Science Foundation of China(Grant No.50534040)+1 种基金the National Natural Science Foundation of China(Grant Nos. 40821001, 40801022,40801024,40801026,50976120,41001041)the Western Project Program of the Chinese Academy of Sciences(Grant No.KZCX2-XB2-10)
文摘With globe warming, road safety will change dramatically, especially within the Qinghai-Tibet Plateau permafrost regions. Because of higher elevation and better almospheric transparency, the Qinghai-Tibet Plateau has stronger radiation than other regions, which can change the daily variation of ground surface temperature on the Plateau. The awning measure （shading board） is one of the actively protected permafrost measures, which was adopted along the Qinghai-Tibet railway and highway and the Qing-Kang Highway in China. Field test results show that embankment surface month mean net radiation is 60-130 W/m2, but the value is below 20 W/m2 under the shading board, and the reducing level of naRn-al net radiation is 80%-90%. The shading board reduced the heat flow entering into the embankment by 80%,90% or more, with heat entering into the soil on the common embankment, but emitting from the embankment under the shading board. At the same time, ground surface temperature under the shading board is 6-8 ℃ lower than the exposed embankment. Test results show that the shading board measure can rapidly and effectively reduce net radiation and heat flow into the embankment, decrease embankment surface and interior temperature, effectively delay increase rate of soil temperature under globe warming, ensure stability and safety of the embankment, and guarantee unblocked road projects in cold and permafrost regions.
基金supported by the National Key Research and Development Program of China(2018YFD0300501)。
文摘Wheat awns contribute to photosynthesis and grain production.In this study,an F2population and F2:3families from a cross between the awned line 7D12 and the Chinese awnless variety Shiyou 20(SY20)were used to identify loci associated with awn length.Bulked-segregant RNA sequencing and linkage mapping identified a single dominant locus in a 0.3 cM interval on chromosome 5AL.Five genes were in the interval,including the recently cloned awn inhibitor B1.Although a single copy of the B1 gene was detected in 7D12,SY20 carried five copies of the gene.Increased copy number of B1 in SY20enhanced gene expression.Based on sequence variation among the promoter regions of five B1 gene copies in SY20,two dominant markers were developed and found to cosegregate with B1 in a population of 931 wheat accessions.All 77 awnless accessions harbored sequence variations in the B1 promoter regions similar to those of SY20 and thus carried multiple copies of the gene,whereas 15 randomly selected awned wheats carried only one copy.These results suggest that an increase in copy number of the B1 gene is associated with inhibition of awn length.
文摘In this paper, the effect of the thermosiphon, insulation board and awning in cooling the permafrost roadbed base was simulated numerically. The computed results were analysed and compared, some practical conclusion were presented.
文摘芒是麦类作物穂部器官的重要组成部分,在提高籽粒产量、促进种子传播和防御虫害等方面具有重要作用。大麦具有丰富的芒型突变体,加之其二倍体的特性,成为麦类作物芒器官形态建成研究的理想作物。本研究报道了一个大麦芒型突变体材料calcaroides,表现为外稃顶端或是稃芒基部异形凸起,形成呈钩状不完全花器结构,属基部钩芒类型。突变体芒较短并伴随抽穗期推迟,株高、穗长和穗粒数显著降低等表型。遗传分析表明,突变体的芒型突变性状受单隐性基因cal-d控制。前期利用cal-d导入系BW106×Bowman的F_(2)群体,结合简化基因组测序(GBS,genotyping by sequencing)分析,将cal-d基因初步定位于3H染色体。进一步利用来自F_(2)的杂合单株,包括13000株单株的F_(2:3)群体进行精细定位,最终将cal-d基因定位于3H染色体153~329 Mb区间的近着丝粒区域。通过转录组混池测序分析结合大麦基因组和表达谱资源数据库,初步筛选了9个候选基因。本研究结果为大麦芒型突变基因cal-d的克隆与功能验证奠定了基础,对于解析麦类作物芒的遗传发育机制具有重要的意义。
基金Youth Scientific Research Project of Anhui University of Chinese Medicine(No.2015qn038)Anhui University Scientific Research Innovation Platform Construction Project(No.2015TD033)。
文摘Objective:To evaluate the intervention effect of awn needle in the treatment of lumbar disc herniation through meta-analysis.Methods:In CNKI,Wanfang Data,PubMed,VIP and other databases,we searched the clinical observation studies on the treatment of patients with lumbar disc herniation with awn needle.The methodological quality of the included studies was evaluated using Cochrane 5.1.0 bias risk assessment criteria and Jadad scale.Revman 5.3 software was used for meta-analysis.Results:A total of 14 randomized controlled trials involving 1186 patients were included,with 595 in the awn needle treatment group and 591 in the control group.Meta-analysis showed that the awn needle treatment group was better than that of the control group in the total effective rate[RR=1.17;95%CI(1.12,1.22);Z=6.66;P<0.00001];the awn needle treatment group was better than the control group in ameliorating VAS score[WMD=-1.07,95%CI(-1.19,-0.95),Z=17.87,P<0.00001];the awn needle treatment group was better than the control group in ameliorating JOA score[WMD=3.18,95%CI(2.64,3.71),Z=11.57,P<0.00001];the awn needle treatment group was better than the control group in the amelioration of ADL score[SMD=2.44,95%CI(0.54,4.35),Z=2.52,P=0.01];the awn needle treatment group was better than the control group in the improvement of SLRT angle[WMD=12.71,95%CI(3.21,22.21),Z=2.62,P=0.009].Conclusion:Awn needle treatment can improve the total effective rate of patients with lumbar disc herniation,relieve the pain of patients,improve the straight leg elevation angle of patients,alleviate the disease development,relieve the symptoms,and improve the quality of life of patients.It is worthy of clinical application.
