山莓叶中茶多酚的提取工艺研究

用正交实验方法研究了从山莓叶中提取茶多酚的提取工艺,得到了提取茶多酚的最佳工艺条件。该工艺条件具有操作简单、产量高、无毒无污染、成本低等特点。     

Mineral nutrition and adventitious rooting in microcuttings of Eucalyptus globulus

We characterized the adventitious rooting response of Eucalyptus globulus Labill. to various concentrations of calcium, nitrogen, phosphorus, iron, manganese, zinc, boron and copper. The parameters analyzed were percent rooting, root number, root length and mean rooting time. Root number and root length were significantly affected by mineral nutrition, whereas mean rooting time and rooting percentage seemed to be closely related to auxin availability. Root number was affected by calcium, nitrogen source and zinc, whereas root length was influenced by concentrations of phosphorus, iron and manganese, and by nitrogen source. Based on these results, we evaluated various combinations of several concentrations of these minerals in each rooting phase. Cuttings that were rooted in an optimized mineral nutrient medium and acclimatized to ex-vitro conditions for two months showed significantly higher survival after transplanting and drought stress than cuttings rooted in basal medium and treated in the same way.     

辣椒单倍体与双单倍体植株叶片光合作用研究

对辣椒单倍体和双单倍体植株的光合作用进行了研究。结果表明 ,在不同光照条件下 ,单倍体植株净光合速率均明显比双单倍体低。在弱光照下 ,气孔的限制作用是单倍体植株净光合速率较低的主要原因 ;而在正常光照下 ,非气孔限制因素是净光合速率降低的主要原因。单倍体植株在强光下受到明显的光抑制 ,单倍体植株净光合速率、气孔导度和表观量子效率均较低 ,在正常光照条件下羧化效率较低 ;光补偿点和细胞间隙CO2 补偿点较高等均是单倍体植株的重要特征     

Influence of MUD on the System Capability of CDMA

In CDMA communication system, the relativities between users result in Multiple Access Interference (MAI). With the increase of users, MAI becomes the main jam of broadband CDMA communication system. Multi-User Detection (MUD) is the most important technology of anti-jamming in the broadband CDMA communication system, which can eliminates MAI effectively by using the information of all user signals to detection single. This paper analyze the expression of system capability without MUD and with MUD, and puts forward the way to increase system capability by using MUD. Then the influence of MUD on CDMA system capability is discussed by MATLAB emulation. Basing analysis and emulation, the conclusion is got: the higher the MUD efficiency, the better the improvement of CDMA system capability; under the same MUD efficiency, the lower data rate, the smaller inter-cell interference, the lower the ratio of bit energy to power spectrum, the better the improvement of CDMA system capability.     

玉米新品种先农998的选育及高产栽培技术

云南地势北高南低,海拔高度相差大,土壤类型多种多样,气候呈垂直分布,加上山区旱地土壤多,农业耕作技术比较传统,因此对玉米品种的综合抗性要求较高。先农998是华中农业大学于2009年在海南省陵水县用自交系A156作母本、自交系A255作父本杂交组配而成的玉米单交种,云南试验示范的5年来,均表现出高产、高抗灰斑病的特点,适合云南省大部分区域种植。     

Evaluating Method of the Coordination Deformation between Asphalt Mixture and Fiber Bragg Grating Sensor

The study on the coordination deformation between asphalt mixture and Fiber Bragg Grating strain sensor (FBG) is the precondition and foundation to solve the problem of FBG application in pavement. According to the two kinds of FBG developed recently (they were classified into three categories based on the application features), we designed an accuracy evaluation testing method for FBG and asphalt mixture coordination deformation, and conducted the strain test of asphalt mixture by static loading and dynamic loading. The result indicates that using FBG after strain modification to measure the internal stain of the pavement structure is feasible. Compared with other kinds of sensors, module matching FBG has a better test effect, and this kind of FBG is able to reflect the accumulative deformation of asphalt mixture to some extent.     

Sludge Treatment and Application in Greening

Sludge is a very good fertilizer source and has higher value in use as nutrients for greening, whereas sludge also contains higher concentration of heavy metals, with which urban underground water would be suffered secondary pollution. A test of greening with sedium lineare and modified fly ash passivation sludge was carried out to study the impacts of different mixture ratio and dosage of modified fly ash on the plant’s growth and leachate. It was shown that 20% mixture ratio of modified fly ash was the optimum for sludge treatment and 80% of heavy metals pollution can be removed.     

Gene flow in common bean (Phaseolus vulgaris L.)

This study was conducted in Brazil in order to assess the potential risk posed by gene escape from transgenic into non-transgenic plants and wild populations. A new methodology was applied to evaluate the gene flow between common bean cultivars, by means of a specially delineated experiment in two stages. The first stage consisted of the planting of one cultivar with violet flowers (BB) as pollen source (‘Diamante Negro’), and a receiver (‘Talismã’) with white flowers (bb), at different distances. The source was sown in the center of the area. The pollen receiver cultivar was sown, in concentrical squares around it. At maturity, the rows were sampled at varied distances from the source in the four cardinal directions. In the second stage, the sampled seeds of the previous stage were sown, and the percentage of outcrossing was evaluated during flowering through the presence of violet flowers (Bb). The highest frequency of natural hybrids, 0.136%, occurred at a distance of 0.5 m between the cultivars. The natural outcrossing rate was practically zero beyond a distance of 3.25 m.     

基于灰色关联度法的黄淮南片小麦新品种综合评判

为科学合理评价小麦新品种(系)品质情况,全面了解新品种的综合表现,本研究采用灰色关联度法分析2019-2020年度国家黄淮南片区试16个新品种的综合表现。结果表明,关联度排序与产量排序有部分差异,关联度较高的品种有漯河68、涡麦169和周麦37号,综合表现与实际相符。7个性状对产量影响的大小依次为:容重、千粒重、株高、全生育期、穗粒数、穗数、成穗率。灰色关联度法一定程度上补充了单一产量评价的不足,但受到权重赋值比例及品种适应性的制约,尚有优化空间,在未来的品种筛选及实际应用时,应结合实际进行评价指标优化和性状指标细化。