饱水清代木材的构造腐朽程度及加固处理对其颜色的影响

以“小白礁I号”沉船主要用材为研究对象,系统研究了饱水考古木材构造特征、腐朽程度与加固剂种类对其加固处理颜色的影响。结果表明：加固剂可提高考古木材尺寸稳定性;坡垒（散孔材）比柚木（环孔材）的加固处理色差变化大;加固剂增重率和考古木材腐朽程度会影响其色差变化;加固剂分子量及其分子结构间差异是造成考古木材加固处理后各色度学参数变化规律不同的主要原因。     

1986—2016年黄河三角洲土地利用/覆被变化及景观格局分析

基于Landsat影像获取1986年、1996年、2006年和2016年的土地利用/覆被变化数据,使用变化轨迹模型和景观格局指数研究黄河三角洲近30年土地利用/覆被结构变化、变化轨迹时空特征及景观格局。结果表明：1996—2016年黄河三角洲耕地、人工水体、建设用地面积呈增加趋势,未利用地、林地、草地和天然水体面积减少,其中未利用地面积减少2 072.75 km²,变化幅度最大。人工水体、建设用地及耕地的增加速度不断减缓;草地和天然水体于1986—1996年缓慢增加,1996年后持续减少;林地、未利用地在3个时段均呈快速减少趋势。“人为因素”驱动轨迹面积占研究区总面积的56.13%,主要类型变化为耕地与人工水体,分布在河流两侧和滩涂向陆一侧;“自然因素”驱动轨迹占比15.80%,主要类型为变化为海域、草地和天然水体,集中分布在北部和东部沿海地区;研究区28.07%的土地利用/覆被类型未发生变化。黄河三角洲“人为因素”驱动轨迹的景观破碎度、集聚程度和结构复杂程度均高于“自然因素”驱动轨迹,人类活动在研究区土地利用/覆被变化过程中起主导作用。该研究结果可为黄河三角洲土地资源开发、管理与保护提供参考。     

Research on Lead-time Compression of Inventory Integrating Remanufacturing and Manufacturing System for the IOT Environment

The lead time compression is the core of supply chain management with time competition and the powerful source of competitive advantage of supply chain.As an emerging technology,The Internet of things ...     

FGF4在肺癌细胞体内和体外中表达差异的研究

FGF4已经被证明是癌基因,它涉及肿瘤的生长和转移,为了解FGF4的表达与肿瘤微环境的关系。我们利用FGF4抗体通过免疫组化对一名肺癌患者癌旁,癌组织,癌组织小鼠移植瘤,二次移植瘤以及原代培养的细胞爬片进行FGF4检测,探究其表达差异。通过对比癌组织与对照组（癌旁组织）,FGF4在癌巢中高表达;同样,移植瘤与二次移植瘤的癌巢中与癌旁组织比较,FGF4表达相对较高;但是将癌组织进行原代培养后,免疫组化检测细胞爬片FGF4,发现仅有5%±0.21%的肿瘤细胞表达FGF4,对照蛋白Cytokine作为肿瘤标记物,则在100%的肿瘤细胞中表达。研究提示免疫组化检测到FGF4在体内和体外表达不同,提示肿瘤细胞FGF4的表达与肿瘤微环境调控密切相关,肿瘤微环境对肿瘤细胞的FGF4的调控有着重要作用。     

湖南省R&D投入产出效率研究

以湖南省R&D投入产出活动为研究对象，采用数据包络分析法(DEA)的BCC模型，结合全国30个省市R&D投入产出数据，对2013年湖南省R&D投入产出效率进行比较分析，并根据实证结果提出相关对策及建议.     

Regulatory effect of salicylic acid and methyl jasmonate supplementation on ergosterol production in Hericium erinaceus mycelia

We evaluated the biomass and ergosterol content of Hericium erinaceus mycelium, and extracellular enzyme activities in H. erinaceus liquid culture following salicylic acid(SA) and methyl jasmonic acid(Me JA)supplementation. The optimal SA concentration was100 lmoláL-1, where the highest ergosterol content of 2.33 mgág-1was obtained following 6-day cultivation with100 lmoláL-1SA supplementation, and which was significantly higher than the unsupplemented control(p \ 0.01). Following 4-day supplementation with50 lmoláL-1Me JA, the highest ergosterol content obtained was 1.988 mgág-1, which was 25.8 % higher than the unsupplemented control. Our data indicate that SA and Me JA supplementation improves ergosterol content in H.erinaceus mycelium.     

Mycoplasma pneumoniae induces IL-1β production through activating NLRP3 inflammasome by ROS in RAW264.7 cells

AIM: To investigate whether Mycoplasma pneumoniae (Mp)-induced interleukin-1β (IL-1β) production in RAW264.7 cells is through the activation of NLRP3 inflammasome via reactive oxygen species (ROS). ME-THODS: RAW264.7 cells were randomly divided into 3 groups. In normal group, RAW264.7 cells were treated without Mp. In model group, RAW264.7 cells were treated with 1∶ 10 multiplicity of infection (MOI) of Mp. In NAC group, RAW264.7 cells were pretreated with N- acetylcysteine (NAC) at a concentration of 5 mmol/L for 30 min before infection with Mp. The RAW264.7cells were infected with Mp (1∶ 10 MOI) for 4, 8, 16 and 24 h in model group and NAC group, respectively. The intracellular ROS level was analyzed by flow cytometry. The mRNA expressions of NLRP3, ASC and caspase-1 were detected by real-time PCR. The protein levels of NLRP3, ASC and caspase-1 p20 were determined by Western blot. The levels of pro-inflammatory cytokine IL-1β in the supernatant were measured by ELISA. RESULTS: Compared with normal group, the production of ROS were significantly increased at 4, 8, 16 and 24 h after infection, the mRNA expression of NLRP3, ASC and caspase-1 were increased at 8, 16 and 24 h after infection, the protein levels of NLRP3, ASC and caspase-1 p20 were increased at 16 and 24 h after infection, and the releases of IL-1β were increased at 24 h after infection in model group (P<0.01). Compared with the model group, the level of ROS in NAC group decreased, so as the expression of NLRP3, ASC and caspase-1 at mRNA and protein levels and the releases of IL-1β in the supernatant at the corresponding time points. CONCLUSION: Mp may stimulate the ROS production to activate NLRP3 inflammasome in RAW264.7 cells.     

农机车载电子设备用户界面框架设计

介绍了一种农机车载电子设备显示界面框架的设计与实现。基于C语言分析设计了界面框架的数据结构,使用分层的数据结构设计方法实现了多类型数据的显示需要和灵活的界面类型组合方式,以极少的开销实现了多级菜单。将内容数据与操作函数分离,解决了操作函数复用的问题,同时提高了程序的可维护性。提出的新型的界面显示框架实现了多种农业装备常见的界面应用类型,解决了小屏幕嵌入式系统显示界面移植性差问题。     

重庆烟区硅酸盐细菌的分离鉴定及生理生化特性

采用土壤稀释平板法从重庆市彭水县的植烟土壤样品中分离出8株具有解钾能力的细菌,通过测定其对含钾矿石中有效钾的释放能力,筛选出两株具有较强的解钾能力的硅酸盐细菌,运用分子生物学方法对这两株硅酸盐细菌的16~23S rDNA序列进行扩增并鉴定。结果表明,一株细菌属于胶质类芽孢杆菌(Paenibacillus mucilaginosus),另一株细菌属于短短芽孢杆菌(Brevibacillus brevis),并且研究了这两株细菌的生理生化特性。     

基于合成法的定位误差的分析与计算

为保证机床夹具设计的可靠性,定位误差的计算是机床夹具设计过程中必不可少的重要环节之一。为此从定位误差的产生机理出发,介绍了定位误差的概念、产生原因,并给出计算公式,有助于快速实现定位误差的求解。