盐胁迫及贮藏时间对4种补血草种子发芽特性的影响

研究了盐胁迫和贮藏时间对二色补血草、黄花补血草、中华补血草和德国补血草种子发芽特性的影响,以探讨其种子萌发时的耐盐性差异,并了解适宜种子发芽的贮藏时间.试验对发芽率、胚根长度、发芽速度、耐盐指数等指标进行了测定分析,结果表明:在0 ～8 g/L NaCl浓度范围内,二色、黄花、德国补血草种子发芽率之间的差异均不显著,但中华补血草种子在8 g/L NaCl浓度下的发芽率显著低于对照及2 g/L和4 g/L的盐处理;随着盐胁迫程度加深,4种补血草的胚根和幼苗长均呈现出先上升后下降的趋势;盐胁迫下德国补血草发芽速度最快,黄花补血草发芽速度最慢;4种补血草有较强的耐盐性,种子萌发时均可耐8 g/L的盐浓度,4种补血草耐盐性强弱表现为:二色补血草＞德国补血草＞中华补血草＞黄花补血草.贮藏1年的4种补血草种子的发芽率均极显著高于贮藏2年的,贮藏时间对中华补血草种子发芽特性影响最小,对德国补血草影响最大,德国补血草不宜采用隔年种子育苗.     

我国主食馒头抗老化技术研究进展

从我国主食馒头产品保藏中存在的问题出发,分析了馒头抗老化保鲜技术的研究现状,综述了馒头抗老化保鲜剂、抗老化工艺及添加原辅材料等馒头保鲜技术的研究进展.     

杏仁油中脂肪酸成分分析及其软胶囊的制备

对杏仁油脂肪酸的组成进行了气相色谱分析,结果表明:杏仁油主要由不饱和脂肪酸组成,其不饱和脂肪酸占油脂总量的96.68%,很适合制备具有营养保健功能的杏仁油软胶囊。同时对制备杏仁油软胶囊的囊壳处方与崩解时限进行了研究,结果表明:当软胶囊的囊材比(水∶明胶∶甘油)为1∶1∶0.5时软胶囊的品质最好,崩解时间分别为10、9、12 min,完全符合中华人民共和国药典的规定。     

One Dimensional Steady Model for Natural Ventilation of Solar Chimney

Solar chimney is effective to enhance the natural ventilation by heating the air with solar radiation. Based on the research by other authors, a revised mathematical model is proposed. One dimensional heat conduction model is proposed when the thermal resistance of both the glass cover and heat absorbing wall are taken into account. The mean temperatures of the air and heat absorbing wall, the air mass rate and heat collection efficiency in the solar chimney are calculated with the present model. The results of the present model are compared with the related experimental data and reasonable agreement is validated. It is shown that the present revised model is able to predict the temperatures of the air and wall, the air mass rate and heat collection efficiency more preciously than the original model.     

Study on constant current control of inductive power transfer with parameter identification

Aiminy at magnetic exciting current (resonant current) control, a constant current control method based on dynamic parameter identification is put forward. With energy conversion analysis, the energy storage, supply and dissipation functions of the system resonant network are constructed. The reflecting impedance identification functions are obtained by constructing the energy equilibrium relations in a period and among several periods. Furthermore, a constant current control strategy by regulating the system input voltage with Buck converter is presented. Combining the relations among system input voltage, the envelope of resonant current and the input of Buck converter, the constant current control law is proposed. The control law is verified with experiments. For the proposed method, in parameter identification, only the data of zero crossing point of resonant voltage and current are required, which reduces the complexity and costs of sampling system. Also, the constant current control law does not need complex computation and is easy to implement.     

Structure design and fabrication for resonant accelerometer based on electrostatic stiffness

The introduced resonant accelerometer makes use of the equivalent electrostatic stiffness to sense the acceleration. The sensitivity can be adjusted by changing the applied sensing voltage and it is robust for the fabrication error. According to the sensing principle,the dynamic model of the single beam accelerometer is built along with the no-linear relationship of the output frequency and the displacement of all positive components. When the stiffness of the vibrating beam is much bigger than the stiffness of the fold beam, the sensitivity can effective achieve. It is the restriction for the structure design. For the differential structure, mode analysis shows it is a lower mode in plane for the work mode. Decreasing the stiffness of connected end for the double vibrating beam can reduce the disturbance error. The bulk micromachining for the resonant accelerometer can achieve high depth width ration etching. The experiment find the structure is not broken and there is the same frequency disturbance problem. FM is suggested to deal with the disturbance. Theory analysis and test provides some important conclusions for the design of the novel type resonant accelerometer.     

海峡西岸社会主义新农村建设的背景分析

海峡西岸社会主义新农村建设应根据国家均衡发展战略、集约型增长、自主创新等政策的要求，抓住闽台产业分工发展、中央支持海峡西岸发展、海峡两岸（福建）农业合作试验区建设等闽台合作的新机遇，充分重视海峡西岸内部城乡差距不断扩大，资源与环境约束日益严重等问题，综合分析区域具备的“城市支持农村、工业反哺农业”的条件以及产业集群化发展的趋势，进而选择符合区域实际的战略。     

土壤Zn向白菜茎叶的转移能力

研究了采自福建不同地区的 26个土壤的Zn向白菜茎叶的转移能力.结果表明,虽然用DTPA提取的有效Zn与茎叶Zn含量之间无显著相关,但以DTPA有效Zn为基础的Zn转移系数与土壤有效Zn之间呈极显著的幂函数相关,这种幂函数相关将白菜茎叶Zn含量与土壤有效Zn联系起来.在土壤Zn与作物Zn含量无显著相关的情况下,可用Zn转移系数(DTPA基)与土壤有效Zn之间的幂函数关系估计土壤Zn的环境质量限量.     

水稻抗条纹叶枯病基因Stvb-i的分子标记检测

为了能将与条纹叶枯病基因Stvb-i完全连锁的分子标记ST10用于分子标记辅助育种中,利用该标记检测了47份水稻材料,同时对材料进行了田间抗性调查。在5个亲本材料及7个育种中间材料中扩增出了ST10特异条带,这些材料田间表现高抗条纹叶枯病;4份高抗条纹叶枯病的材料中未扩出特异条带,这些材料中可能有其它抗性基因。