Site types of the afforestation region of the shelter-forest ecological project along the Tarim Desert Highway were classified based on the natural conditions and windblown sand damages. The extremely severe environme...Site types of the afforestation region of the shelter-forest ecological project along the Tarim Desert Highway were classified based on the natural conditions and windblown sand damages. The extremely severe environment, the irrigation with saline water, and large-scale linear project makes this classification of site types most unique and significant. It adopted a three-level classification system integrating the dominant factors and restrictive factors in regard to their impacts on plant survival and growth as well as on the protective property. Six site type districts were classified based on the medium-scale geomorphic unit, the windblown sand damages, and the major production facilities; 21 site type groups were obtained according to the small-scale geomorphic type, terrain, and wind regime; 36 site types were further classified based on the salt contents of the underground water and soil types. Especially, in this study, spatial distribution of the six site type districts along the desert highway is continuous, which is unique and different from that of most other classifications. In addition, the salt-stress tolerance threshold of the main afforestation plant species to underground water have been set to 8 g/L and 15 g/L according to selective breeding tests and the salinity spatial distribution of the underground water. Thus, the underground water with salinity lower than 8 g/L is defined as light saline water in this area.展开更多
In the present study, the safety of Hoemophilus influenza type b conjugate vaccines inoculated in the upper arm deltoid and vastus lateralis muscle was evaluated. 680 infants aged 2-5 months and 6-12 months were selec...In the present study, the safety of Hoemophilus influenza type b conjugate vaccines inoculated in the upper arm deltoid and vastus lateralis muscle was evaluated. 680 infants aged 2-5 months and 6-12 months were selected to be the research subjects in whom the Hib conjugate vaccines were inoculated by injection in the upper arm deltoid and vastus lateralis muscle, respectively. The safety analysis indicated that there were no statistic differences in the incidence rates of adverse reactions when the Hib conjugate vaccines were inoculated at different sites. So we concluded that the safety of inoculation injection of Hib conjugate vaccines in vastus lateralis muscle was the same as that inoculated in the upper arm deltoid.展开更多
Female grasshoppers can affect the fitness of their offspring through their selection of oviposition site. Knowledge of soil type on oviposition, and its effects on subsequent development can provide guidelines for ha...Female grasshoppers can affect the fitness of their offspring through their selection of oviposition site. Knowledge of soil type on oviposition, and its effects on subsequent development can provide guidelines for habitat manipulations that reduce the harmful effects of these pests on farmers fields. The influence of soil types on the oviposition site preference of variegated grasshopper (Zonocerus variegatus L.) reared some cassava (Manihot esculenta Crantz) varieties, was investigated in a cage trial carried out at the Bio factory laboratory, School of Agriculture and Food Sciences, Njala University, Sierra Leone during 2022/2023. The treatments comprised three soil types (Sandy, Loamy and Clay), each with three replications laid out in a randomized complete block design (RCBD) in wooden cages. Data were collected on the following development parameters including, Net reproductive growth ratio (R0), Generation time (Tc), Intrinsic rate of increase (rm), Finite rate of increase (), Doubling time (Dt), and overall survivorship. Findings revealed that, Z. variegatus L. preferred sandy soil in which, on average, most eggs were deposited (338, 6.62 4.40), followed by loamy soil, 286 (5.53 3.96), and then, clayey soil, 200 (3.91 3.85);though, the differences were not significant. This study established that Z. variegatus deposited more eggs in sandy soil > loamy soil > clayey soil, respectively;and subsequent survivorship of the immature unto mature adult insect, revealed a similar order. This indicates that the sandy soil is the most preferred substrate for oviposition and subsequent development into adult insects.展开更多
【目的】基于水文过程模拟分析,研究白洋淀上游山区水源涵养林优化配置,提升该区水源涵养林建设质量。【方法】以2016年为例,利用SWAT(Soil and Water Assessment Tool)模型验证了白洋淀上游山区安各庄流域本地化过程的适用性,根据安各...【目的】基于水文过程模拟分析,研究白洋淀上游山区水源涵养林优化配置,提升该区水源涵养林建设质量。【方法】以2016年为例,利用SWAT(Soil and Water Assessment Tool)模型验证了白洋淀上游山区安各庄流域本地化过程的适用性,根据安各庄流域立地条件共划分63种立地类型并进行立地质量等级评价。根据立地条件进行水源涵养林空间配置,再利用SWAT模型情景分析模拟不同水源涵养林空间配置下的径流量。【结果】在以调整混交林、针叶林为主的情景下,流域丰水期径流量比实测值减少15.79%,枯水期径流量比实测值增加15.83%。在空间配置上,阔叶林主要配置在缓坡和斜坡地,以阳坡为好;混交林主要配置在斜坡地和陡坡地;针叶林主要配置在陡坡地,以阴坡为好;灌木林主要配置在斜坡地和陡坡地,尤其是在土层薄的部位。【结论】在以混交林、针叶林为主的空间配置下,水源涵养林涵养水源功能发挥最好。展开更多
目的探讨心外膜脂肪厚度(epicardial fat thickness,EFT)、血清分泌型卷曲相关蛋白5(secreted frizzled-related protein 5,SFRP5)、无翅型MMTV整合位点家族成员5a(winglesstype MMTV integration site family member 5a,Wnt5a)与急性S...目的探讨心外膜脂肪厚度(epicardial fat thickness,EFT)、血清分泌型卷曲相关蛋白5(secreted frizzled-related protein 5,SFRP5)、无翅型MMTV整合位点家族成员5a(winglesstype MMTV integration site family member 5a,Wnt5a)与急性ST段抬高型心肌梗死(ST-segment elevation myocardial infarction,STEMI)患者经皮冠状动脉介入(percutaneous coronary intervention,PCI)治疗后支架内再狭窄(in-stent restenosis,ISR)的关系。方法纳入128例接受急诊PCI的STEMI患者,随访12个月后根据冠状动脉造影结果分为非ISR组(80例)和ISR组(48例)。比较两组的一般资料,出院前及术后1个月EFT,术前及术后1个月血清SFRP5、Wnt5a水平,以及不同冠状动脉病变程度患者指标水平的差异。采用Pearson相关性分析,评估术后1个月EFT和血清SFRP5、Wnt5a水平的相关性。采用多因素Logistic回归分析,确定STEMI患者PCI术后发生ISR的危险因素。采用ROC曲线分析,评估EFT和血清SFRP5、Wnt5a水平对ISR的预测价值。结果ISR组出院前及术后1个月EFT均大于非ISR组;术后1个月血清SFRP5低于非ISR组,血清Wnt5a高于非ISR组(均P<0.01)。非ISR组术后1个月血清SFRP5较术前显著升高,而ISR组则显著降低;非ISR组术后1个月血清Wnt5a较术前轻度升高,ISR组则显著升高(均P<0.05)。3支病变组术后1个月血清SFRP5显著低于单支或2支病变组(P<0.05)。术后1个月EFT与SFRP5呈负相关,与Wnt5a呈正相关。单因素Logistic回归分析及校正年龄、BMI等因素后的Logistic回归分析均显示,术后1个月EFT、血清SFRP5和Wnt5a是ISR的独立影响因素。ROC曲线分析显示,三者联合检测的AUC值(0.906)高于单一指标检测。结论STEMI患者术后1个月EFT增大、血清SFRP5降低及Wnt5a升高与PCI术后ISR密切相关,早期检查有助于预测ISR,联合检测的预测价值更高。展开更多
目的观察腓肠肌钝挫伤白兔的腓肠肌中的无翅型MMTV整合位点家族成员5a(wingless-type MMTV integration site family member 5a,Wnt5a)、糖原合成酶激酶3(glycogen synthase kinase 3,GSK3)/β-联蛋白(β-catenin)的mRNA和蛋白表达,以...目的观察腓肠肌钝挫伤白兔的腓肠肌中的无翅型MMTV整合位点家族成员5a(wingless-type MMTV integration site family member 5a,Wnt5a)、糖原合成酶激酶3(glycogen synthase kinase 3,GSK3)/β-联蛋白(β-catenin)的mRNA和蛋白表达,以及病理染色中呈现的肌肉纤维、脂肪组织的情况,为揭示按揉法治疗骨骼肌损伤的修复机制提供依据。方法选择健康新西兰白兔42只,雌雄各半。采用随机数字表法将其分为空白组、模型3 d组、模型7 d组、模型14 d组、按揉3 d组、按揉7 d组、按揉14 d组,每组6只。各模型组、按揉组在操作后第4、8、15天取材。采用实时定量聚合酶链反应和蛋白质印迹法检测Wnt5a、GSK3、β-catenin的mRNA和蛋白表达情况;采用苏木精-伊红(hematoxylin and eosin,HE)染色和油红O染色观察肌肉组织肌纤维及脂肪组织的情况。结果HE染色显示,模型7 d组发生显著纤维组织增生和炎性细胞浸润;模型14 d组可见部分肌纤维变性坏死、再生伴纤维组织增生及轻微炎性细胞浸润,轻微钙化;各按揉组可见明显肌纤维变性坏死、再生,炎性细胞浸润伴随显著纤维组织增生。油红O染色显示,各模型组可见脂肪细胞沉积,其中模型7 d组最重;各按揉组肌肉纤维及序列未见明显破坏,间隙可见少量脂肪细胞浸润。各组腓肠肌Wnt5a、GSK3、β-catenin的mRNA表达与蛋白表达比较,差异均有统计学意义(P<0.001)。结论腓肠肌损伤组织病理变化随着时间推移会逐渐恢复,按揉法刺激了Wnt5a、GSK3、β-catenin的mRNA的表达活性,从而可能减缓支架蛋白复合物(GSK3为其重要的组成部分)对β-catenin蛋白的降解,使β-catenin的蛋白水平始终维持在稳定范围,使得按揉法干预后的腓肠肌中脂肪变性减少,促进了损伤骨骼肌功能修复。展开更多
基金Supported by Major Orientation Foundation of the CAS Innovation Program (Grant No. KZCX3-SW-342)CAS Action-Plan for West Development (Grant No. KZCX2-XB2- 13)+3 种基金Major Scientific and Technological Special of Xinjiang Uygur Autonomous Region (Grant No. 200733144-3)National Natural Science Foundation of China (Grant No. 40701019)the research projects of the Tarim Branch of PetroChina Company Limited (Grant Nos. 971008090016 and 971008090017)the Western Light of the Chinese Academy of Sciences (Grant No. 20052118)
文摘Site types of the afforestation region of the shelter-forest ecological project along the Tarim Desert Highway were classified based on the natural conditions and windblown sand damages. The extremely severe environment, the irrigation with saline water, and large-scale linear project makes this classification of site types most unique and significant. It adopted a three-level classification system integrating the dominant factors and restrictive factors in regard to their impacts on plant survival and growth as well as on the protective property. Six site type districts were classified based on the medium-scale geomorphic unit, the windblown sand damages, and the major production facilities; 21 site type groups were obtained according to the small-scale geomorphic type, terrain, and wind regime; 36 site types were further classified based on the salt contents of the underground water and soil types. Especially, in this study, spatial distribution of the six site type districts along the desert highway is continuous, which is unique and different from that of most other classifications. In addition, the salt-stress tolerance threshold of the main afforestation plant species to underground water have been set to 8 g/L and 15 g/L according to selective breeding tests and the salinity spatial distribution of the underground water. Thus, the underground water with salinity lower than 8 g/L is defined as light saline water in this area.
文摘In the present study, the safety of Hoemophilus influenza type b conjugate vaccines inoculated in the upper arm deltoid and vastus lateralis muscle was evaluated. 680 infants aged 2-5 months and 6-12 months were selected to be the research subjects in whom the Hib conjugate vaccines were inoculated by injection in the upper arm deltoid and vastus lateralis muscle, respectively. The safety analysis indicated that there were no statistic differences in the incidence rates of adverse reactions when the Hib conjugate vaccines were inoculated at different sites. So we concluded that the safety of inoculation injection of Hib conjugate vaccines in vastus lateralis muscle was the same as that inoculated in the upper arm deltoid.
文摘Female grasshoppers can affect the fitness of their offspring through their selection of oviposition site. Knowledge of soil type on oviposition, and its effects on subsequent development can provide guidelines for habitat manipulations that reduce the harmful effects of these pests on farmers fields. The influence of soil types on the oviposition site preference of variegated grasshopper (Zonocerus variegatus L.) reared some cassava (Manihot esculenta Crantz) varieties, was investigated in a cage trial carried out at the Bio factory laboratory, School of Agriculture and Food Sciences, Njala University, Sierra Leone during 2022/2023. The treatments comprised three soil types (Sandy, Loamy and Clay), each with three replications laid out in a randomized complete block design (RCBD) in wooden cages. Data were collected on the following development parameters including, Net reproductive growth ratio (R0), Generation time (Tc), Intrinsic rate of increase (rm), Finite rate of increase (), Doubling time (Dt), and overall survivorship. Findings revealed that, Z. variegatus L. preferred sandy soil in which, on average, most eggs were deposited (338, 6.62 4.40), followed by loamy soil, 286 (5.53 3.96), and then, clayey soil, 200 (3.91 3.85);though, the differences were not significant. This study established that Z. variegatus deposited more eggs in sandy soil > loamy soil > clayey soil, respectively;and subsequent survivorship of the immature unto mature adult insect, revealed a similar order. This indicates that the sandy soil is the most preferred substrate for oviposition and subsequent development into adult insects.
文摘【目的】基于水文过程模拟分析,研究白洋淀上游山区水源涵养林优化配置,提升该区水源涵养林建设质量。【方法】以2016年为例,利用SWAT(Soil and Water Assessment Tool)模型验证了白洋淀上游山区安各庄流域本地化过程的适用性,根据安各庄流域立地条件共划分63种立地类型并进行立地质量等级评价。根据立地条件进行水源涵养林空间配置,再利用SWAT模型情景分析模拟不同水源涵养林空间配置下的径流量。【结果】在以调整混交林、针叶林为主的情景下,流域丰水期径流量比实测值减少15.79%,枯水期径流量比实测值增加15.83%。在空间配置上,阔叶林主要配置在缓坡和斜坡地,以阳坡为好;混交林主要配置在斜坡地和陡坡地;针叶林主要配置在陡坡地,以阴坡为好;灌木林主要配置在斜坡地和陡坡地,尤其是在土层薄的部位。【结论】在以混交林、针叶林为主的空间配置下,水源涵养林涵养水源功能发挥最好。
文摘目的探讨心外膜脂肪厚度(epicardial fat thickness,EFT)、血清分泌型卷曲相关蛋白5(secreted frizzled-related protein 5,SFRP5)、无翅型MMTV整合位点家族成员5a(winglesstype MMTV integration site family member 5a,Wnt5a)与急性ST段抬高型心肌梗死(ST-segment elevation myocardial infarction,STEMI)患者经皮冠状动脉介入(percutaneous coronary intervention,PCI)治疗后支架内再狭窄(in-stent restenosis,ISR)的关系。方法纳入128例接受急诊PCI的STEMI患者,随访12个月后根据冠状动脉造影结果分为非ISR组(80例)和ISR组(48例)。比较两组的一般资料,出院前及术后1个月EFT,术前及术后1个月血清SFRP5、Wnt5a水平,以及不同冠状动脉病变程度患者指标水平的差异。采用Pearson相关性分析,评估术后1个月EFT和血清SFRP5、Wnt5a水平的相关性。采用多因素Logistic回归分析,确定STEMI患者PCI术后发生ISR的危险因素。采用ROC曲线分析,评估EFT和血清SFRP5、Wnt5a水平对ISR的预测价值。结果ISR组出院前及术后1个月EFT均大于非ISR组;术后1个月血清SFRP5低于非ISR组,血清Wnt5a高于非ISR组(均P<0.01)。非ISR组术后1个月血清SFRP5较术前显著升高,而ISR组则显著降低;非ISR组术后1个月血清Wnt5a较术前轻度升高,ISR组则显著升高(均P<0.05)。3支病变组术后1个月血清SFRP5显著低于单支或2支病变组(P<0.05)。术后1个月EFT与SFRP5呈负相关,与Wnt5a呈正相关。单因素Logistic回归分析及校正年龄、BMI等因素后的Logistic回归分析均显示,术后1个月EFT、血清SFRP5和Wnt5a是ISR的独立影响因素。ROC曲线分析显示,三者联合检测的AUC值(0.906)高于单一指标检测。结论STEMI患者术后1个月EFT增大、血清SFRP5降低及Wnt5a升高与PCI术后ISR密切相关,早期检查有助于预测ISR,联合检测的预测价值更高。
