连阴雨寡日照对大棚草莓小气候、产量和品质的影响

为分析冬春季连阴雨寡日照对大棚草莓产量和品质的定量化影响,探究其影响规律,促进草莓生产减灾增收,实验筛选3个连阴雨寡日照天气发生较重的典型受灾年份,将未发生该灾害的相近年份同时段作为对照,对比分析草莓棚内气象要素、果实产量和品质相关指标,根据上述年度数据差异进一步分析了受灾最重年份逐月果实产量品质指标,以探究连阴雨寡日...     

华北紫丁香花芽分化期营养物质与核酸含量的变化

为制定合理的花期调控措施.进一步揭示华北紫丁香花芽分化的生理特性,以不同时期的华北紫丁香花芽、叶芽及其叶片为材料,研究在花芽分化过程中可溶性糖、淀粉、可溶性蛋白质及核酸含量的变化.华北紫丁香在生理分化期花芽中可溶性糖、可溶性蛋白质、淀粉及核酸含量都达到最大值.且花芽的积累远远大于叶芽,说明以上物质的高浓度均有利于花芽的孕育;形态分化期间花芽中可溶性糖、淀粉、蛋白质、核酸含量下降后,又逐步回升,且其各个时期含量均高于叶芽.初步明确了华北紫丁香花芽分化期的主要营养物质及其核酸含量的变化规律.     

云南烟叶可持续发展规范(STP)推广成效与启示

可持续发展是烟草行业现代化的发展方向,也是增强烟草行业核心竞争力的重要主题。笔者分析了2017—2020年云南省烟叶可持续发展规范(STP)的实施情况及对云南烟叶出口量的影响,总结了领导机制的建设、专项资金的灵活使用、人才队伍的建设、数字化管理平台的构建方面的主要做法。认为云南STP的实施间接地影响了全省烟叶安全性、生产方式及生产管理理念,云南烟叶出口适销率逐年上升。结合云南烟叶生产实际,为保障STP生产管理的有效实施,提出建立STP行业标准、强化劳动用工规范、推进质量追溯、以绿色销售拉动绿色生产。     

巨尾桉苗缺铁黄化病的防治

巨尾桉苗黄化病是一种生理病害,表现为缺素症,主要是缺铁。在缺铁、排水不良、碱性的土壤容易发病,改变土壤理化性的同时施铁元素以及氮、磷、钾等大量元素能使桉苗更好地恢复生长。     

金秋梨栽培技术

介绍了金秋梨壮苗培育,科学建园,土壤管理和施肥技术以及整形修剪,花果管理和病虫害防治等栽培技术。     

Adhesion of bone marrow stromal cell in children with acute lymphoblastic leukemia

AIM and METHOD: The adhesion behavior of bone marrow stromal cells(BMSC) in children with acute lymphoblastic leukemia(ALL) to bone marrow mononuclear cells(BMMC) and Raji cells were investigated by MTT method. The expression of adhesion molecules ICAM-1 and VCAM-1 were detected by flow cytometry. RESULTS: The adhesion ability of BMSC in acute period of ALL to BMMC was lower than that of control group. The adhesion ability of BMSC in long term remission period of ALL to Raji cells higher than that of control group. The expression of ICAM-1 on the surface of BMSC in acute period of ALL is much lower than that of control group. CONCLUSIONS: The adhesion of BMSC to BMMC or tumor cells in children with ALL was abnormal. The abnormal adhesion behavior might be partially due to the changed expression of adhesion molecules on BMSC.     

MicroRNA-142-3p modulates atherosclerosis-associated endothelial cell apoptosis via targeting Rictor

AIM To investigate the role of microRNA-142-3p （miR-142-3p） in endothelial cell apoptosis during atherosclerosis （AS） and the underlying mechanism. METHODS Human aortic endothelial cells （HAECs） were treated with oxidized low-density lipoprotein （ox-LDL）. The expression level of miR-142-3p was detected by RT-qPCR. Apoptosis was determined via flow cytometry （FCM） and caspase-3 activity assay. Prediction of the binding site between miR-142-3p and 3’-UTR of Rictor mRNA was performed by bioinformatics analysis and confirmed by dual-luciferase reporter assay. RESULTS The expression of miR-142-3p was substantially up-regulated during the ox-LDL-elicited apoptosis in HAECs （P<0.05,P<0.01）. Forced expression of miR-142-3p exacerbated apoptosis in HAECs whereas inhibition of miR-142-3p partly alleviated apoptotic cell death mediated by ox-LDL. Further analysis identified Rictor as a direct target gene of miR-142-3p, and Rictor knock-down abolished the anti-apoptotic effect of miR-142-3p inhibitor. Moreover, the Akt/endothelial nitric oxide synthase （eNOS） signaling pathway was found to mediate the beneficial effect of miR-142-3p inhibitor on endothelial cells apoptosis. CONCLUSION Down-regulation of miR-142-3p inhibits endothelial cell apoptosis and atherosclerotic development by up-regulating the expression of Rictor and activating the Akt/eNOS signaling pathway.     

30.5%毒死蜱·甲氨基阿维菌素笨甲酸盐微乳剂防治小菜蛾田间药效试验

田间试验表明,30.5%毒死蜱·甲氨基阿维菌素苯甲酸盐微乳剂对小菜蛾有良好的防治效果,15～25 mL/667 m2后14d防效均达98%以上.     

LACC集中采编系统(单机版)下中文机读书目数据上传之浅见

通过对在LACC集中采编系统（单机版）下开展机读书目数据上传业务中的实际操作,探讨了在该系统下分编书目数据中存在的不足与修正方法。     

干渣吸附处理含磷污水的研究

采用批量平衡法,研究了水体磷浓度、干渣粒径和温度对干渣吸附除磷效果的影响,探讨了干渣对水体中磷素的选择性吸附特征及其饱和吸附磷素后的解吸释磷现象。结果表明,溶液浓度越高,干渣吸附除磷速率越慢,效率越低。磷浓度为6和12mg·L^-1时,作用20h后,除磷效率可达90%。干渣粒径越小,除磷速率越快,效果也越好,磷浓度为12mg·L^-1,吸附平衡后,30、60和100目干渣的除磷效率分别为80%、93%和96%。温度对干渣除磷效果的影响较大,磷浓度为12mg·L^-1,25和35℃时,除磷效率可达95%,但在5℃时,除磷效率仅为75%。干渣能够选择性地吸附去除水体中的磷素,适宜作为除磷吸附剂,处理多种含磷污水。