酿酒曲对柑橘梨汁复合酒发酵工艺的影响

通过添加不同含量的酿酒曲到柑橘梨汁复合液进行试验,结果表明：酿酒曲具有提高果汁出汁率,从而提高酒精度的作用;适当提高酿酒曲含量有利于果汁含糖量的快速降解,可获得较高浓度的酒精     

普洱市烤烟评吸质量特性及其区域差异研究

为系统、深入地了解云南省普洱烟区烤烟感官品质特点,通过对普洱市不同区域烤烟评吸质量的综合评价和统计学分析,结果得出:下部叶的香气量、浓度、劲头、余味、燃烧性、灰色和中部叶的香气质、香气量、杂气、劲头、刺激性、燃烧性、灰色和上部叶的香气量、劲头、刺激性、余味、燃烧性、灰色表现较为一致,是共性较强的普洱烟叶感官特征。墨江县鱼塘乡烤烟评吸质量最优,上、中、下部位的各项评吸指标均位居前列,其次为宁洱县勐先乡和镇沅县九甲乡。     

桃花粉活性检测和离体萌发特性的研究

果树花粉活力直接影响授粉、受精乃至座果。为了解果树品种的花粉生活力,给引种栽培和杂交育种工作创造有利条件,以桃花粉为试验材料,采用染色方法检测花粉的活性。试验结果表明,含有蓝墨水的花粉培养基,花粉萌发率可以达到64.67%,与对照相比差异不明显,因此该方法比较适合于快速检测花粉活性;固体培养基培养2个品种桃花粉,萌发率比液体培养基培养分别高25%和20%。另外温度、花粉密度、培养基中蔗糖及硼酸浓度都对花粉萌发率和花粉管长度有影响,在温度为24℃、1粒花药/100 μL、10%的蔗糖或100 mg/L的硼酸的条件下,均有利于花粉萌发和花粉管生长。     

河套灌区中低产田油用向日葵肥料效应分析

为了确定内蒙古河套灌区中低产田油用向日葵氮、磷、钾肥料效应,采用三因素二次通用旋转设计法,对该灌区油用向日葵进行氮、磷、钾施肥试验研究。结果表明,河套灌区施用氮、磷、钾均对油用向日葵产量有显著的增产效果,并能用三元二次多项式进行模拟表达。最高理论产量可达4331.55 kg/hm2;最佳产量为4252.35 kg/hm2,氮、磷、钾的经济效益最佳配比为6.91:3.31:1。根据产量施肥的边际利润率值,可求出不同施肥成本的利润,从而选用投资少、获利高的施肥方案。     

Protein phosphatases 1 and 2A and the regulation of calcium uptake and pollen tube development in Picea wilsonii

To investigate the roles of protein phosphatases 1 and 2A in the development of pollen tubes of Picea wilsonii Mast., pollen grains were cultured in standard medium in the presence and absence of the protein phosphatase inhibitors okadaic acid and calyculin A. At nanomolar concentrations, these compounds blocked pollen tube growth, causing abnormal morphologies of the pollen tubes. Studies with Fluo-3 revealed that the inhibitors reduced the pollen-tube tip-to-base cytoplasmic calcium (Ca(2+)) gradient and arrested extracellular Ca(2+) uptake. The transmission electron microscope observations indicated that the fusion of paramural bodies with plasma membranes occurred frequently in the tip and sub-tip regions of control pollen tubes, but fusion rarely occurred in inhibitor-treated pollen tubes. Staining with aniline blue showed that callose accumulated in the tip regions of inhibitor-treated pollen tubes. Immunolabeling of pollen tubes revealed that acidic pectin epitopes recognized by the monoclonal antibody JIM5 were present in the tip region and on the flanks of the sub-tip in normal pollen tubes. In inhibitor-treated pollen tubes, these epitopes existed only in the extreme tip region and at higher concentrations than in control pollen tubes. The esterified pectin recognized by JIM7 was located preferentially at the extreme tip region in normal pollen tubes, but at basal sites in inhibitor-treated tubes. Fourier transform infrared (FTIR) analysis further confirmed the changes in acidic and esterified pectin distributions and their relative contents. These results suggest that protein phosphatase 1 or 2A, or both, are involved in the regulation of Ca(2+) uptake across the plasma membrane, in exocytotic activity and in the biosynthesis of cell wall components, all processes that occur in the tip region of pollen tubes and that control pollen tube development.     

Feature Extraction of defects on wood surface

IntroductionAtpresent,usingthecomputerimageprocessil1gsys-temtofinishthefeatureextractiol1ofw0oddefectsisi11anexpIorat0rystage.ThismetI1odmaydecreasetI1ellmitati0noftl1eexperilnel1talcol1ditions,suChasIights,instrumentsandsomespccialmateriaIs.Itiscol1venic11ttousethiswayandthegoodresuItswilIbeacI1ieved.TherearethreetypicaIwo0dsurfacedefectst0bestudiedintheexperiment,whicI1arekn0t,boreI1oleal1ddecayofLarixandBeIlIlu.Tl1eworkist0separatetl1edefectsfromthewoodsurfaceimagesandprovideagoodba…     

重型木结构在我国的应用和发展

文中总结了重型木结构的特性与相关技术发展动态以及在发达国家和地区的工程应用现状, 结合我国经济社会发展现阶段面临的环境问题和国内土木工程建设技术发展要求, 从政策导向、社会需求、木材资源和技术力量等方面对重型木结构在我国的应用适宜性进行了分析, 最后指出其应用前景。     

集体林分权条件下的林地细碎化程度及与农户林地投入产出的关系——基于江西省8县602户农户调查数据的分析

以江西省8个县602户农户调查数据为基础,运用定量统计方法,分析集体林分权条件下的林地细碎化程度、农户投入水平及与林地产出的关系,以验证集体林权制度改革后的农户林地细碎化经营是否具有经济合理性.实证结果表明:以S指数衡量,江西省样本县林地细碎化的程度达到0.55,受访农户林地细碎化程度与地貌特征之间未出现明显的关联性;以户均数据衡量,受访农户从家庭收入中用于林业投资的比例维持在30％左右,且传统林业重点县的农户林业投入比例要明显高于非林业重点县.计量模型计算结果表明,S指数衡量的林地细碎化程度对农户林业投入和林地产出水平均构成负向影响趋势;曲线模型临界值分析表明,当农户林地细碎化程度低于0.23或高于0.69时,农户投资林业的积极性则随着林地细碎化程度高低呈现正向变化趋势,当林地细碎化程度低于0.22或高于0.67时,林地细碎化程度对林地产出水平表现为负向影响趋势.     

土地资源评价的研究进展

着重阐述土地资源评价的国内外研究现状及进展，并提出今后发展的若干建议：(1)建立统一的标准及规范，达到信息共享与交流。(2)在土地动态评价方面，要以主题数据库和地理信息为核心，运用多集成技术为数据的动态更新、决策支持提供更合理的判断，实现土地资源的动态评价。(3)在数据组织方面，应运用面向对象技术，开发面向对象数据库和面向对象数据模型，以满足数据的开放性和互操作性便于数据共享和并行处理。     

基于小型电磁振动式小麦播种机的UG仿真

针对传统小型小麦播种机的缺点,设计了一种小型电磁振动式小麦播种机。该播种机具有播种质量高、速度快、安全系数大、播种成本低、适应不同田间要求,以及能有效减少能耗等特点。该机田间作业时,可以将开沟、播种、平土一次完成,大大简化了小麦播种时的生产流程,有利于进一步提高播种效率,解放生产力。为此,介绍了小型电磁振动式小麦播种机的整体构造和工作原理,并运用三维软件UG进行运动学分析,真实再现了小型电磁振动式小麦播种机新型开沟器的工作状况。结果表明:小型电磁振动式小麦播种机新型开沟器能够满足工作需求。经过进一步地改进和研究,此机将在播种小麦方面有较大的发展前景,同时对各种开沟器的研制也具有启迪作用。