花生壳天然抗氧化成分的提取研究

对新鲜成熟花生中抗氧化成分的提取进行了系统的研究，通过正交试验，得出了提取的最佳条件；乙醇作浸提剂，ｐＨ值３．０，温度６０～７０℃，浸提时间７２ｈ及液固比２０，在此条件下提取率最高达２．２１％，乙醇提取物可提高油脂抗氧化性能，且其中含有黄酮类物质；提取后的废渣中，蛋白质含量为１．９１％。     

不同产地花生壳中木犀草素的HPLC测定

建立了花生壳中木犀草素含量测定的HPLC方法，以C18键合硅胶为填充剂，流动相用50：50：1的甲醇：水：乙酸，检测波长254nm。结果显示不同产地花生壳的HPLC图谱类似，木犀草素含量在0．25％～1．12％之间。该方法样品前处理简便，测定结果准确，为花生壳药材及其加工产品的质量控制提供了技术方法，有实际应用价值。     

食葵割台落粒损失和籽粒表皮损伤关键影响因素分析

食葵联合收获机田间作业时,割台拨禾轮在拨禾过程中碰撞葵盘造成葵盘落粒,在螺旋输送器输送籽粒和葵盘过程中,籽粒表皮受到摩擦作用力导致表皮损伤,此外割台剧烈振动也会引起茎秆抖动,进而造成葵盘落粒。针对上述问题,该研究对适收期内不同含水率下食葵收获过程中割台碰撞、振动作用对葵盘落粒损失以及摩擦作用对籽粒表皮损伤的影响规律进行试验研究,明确食葵较佳收获时期,提高食葵收获作业效果。首先,开展拨禾轮与葵盘碰撞作用对落粒损失影响试验和螺旋输送器输送过程对食葵籽粒表皮损伤影响试验,结果表明籽粒含水率与落粒损失率呈极显著负相关（P<0.01）,与籽粒表皮损伤率呈极显著正相关（P<0.01）。其次,根据食葵收获对籽粒损失率和损伤率的要求确定了落粒损失率和籽粒表皮损伤率对收获效果的影响权重分别为0.54和0.46,通过目标函数寻优得出籽粒含水率为9%～13%为食葵较佳收获期。最后,基于Default Shaker液压振动台研究联合收获机主要振动频率范围内（1～40 Hz）的振动激励对落粒损失的影响,结果表明,食葵植株在7Hz振动激励作用下葵盘落粒损失率最大为1.5%。试验结果可为割台关键部件运行...     

凸体的混合宽度积分

引入了凸体的混合宽度积分的概念,研究了其性质,并建立了有关凸体的混合宽度积分的循环不等式和Brunn-Minkowski不等式.     

局部凸空间中凸幂凝聚算子的不动点定理及其应用

首先给出了局部凸空间中一类新的算子--凸幂凝聚算子的定义,推广了Banach中的凝聚算子,并获得了这类凸幂凝聚算子的一个不动点定理.作为应用,本文建立了一类半线性发展方程的解的存在性结果.     

玻璃钢渔船总体设计中的参数选择

纤维增强塑料渔船──简称玻璃钢（ｆｉｂｅｒｇｌａｓｓ　ｒｅｉｎｆｏｒｃｅｄ　ｐｌａｓｔｉｃ,ＦＲＰ）渔船具有阻力小、自重轻、耐腐蚀、寿命长、易于维修和保养等特点。玻璃钢渔船材质轻巧,特别适用于作业方式较轻缓的渔船（典型的如钓船）,而回避那些作业强度大,对鱼类资源破坏严重的高强度作业方式,因而适应环境和资源保护的需要,正成为现代渔船的发展方向之一。但由于受初始造价偏高及其它技术因素的影响,我国ＦＲＰ渔船进展缓慢,船型不多、数量偏少、经验和统计资料较为缺乏。本文根据设计研究和统计分析的实践经验,提出…     

大豆种皮过氧化物酶活力的测定方法

采用分光光度法对大豆种皮过氧化物酶活力进行了测定。波长470 nm处,酶活力在0.2～2.0 U/mL内有良好线性关系,其方法的精密度良好(RSD=3.07)。大豆种皮过氧化物酶耐热性能高、酸碱稳定性好,是过氧化物酶的一个很好的来源。     

Physical properties of wheat flour composites dry-coated with microparticulated soybean hulls and rice flour and their use for low-fat doughnut preparation

Air-classified wheat flour was dry-coated with microparticulated rice flour (30%, db) and/or microparticulated soybean hulls (up to 10%, db) using a hybridization system, and the physical properties of the dry-coated wheat flour were examined. The composite wheat flours exhibited the higher water-holding capacity but lower swelling power and oil-holding capacity than their counterpart mixtures. In pasting viscosity, the composites of wheat and rice flours had substantially lower values for peak viscosity and breakdown than did pure wheat flour. The incorporation of soybean hulls to the composites of wheat and rice flours further reduced the peak viscosity. The composites with rice flour and soybean hulls showed slightly higher melting (gelatinization) temperatures but lower melting enthalpy compared to the counterpart mixtures. By using the composite flours for the deep-fat fried doughnut preparation, the oil uptake could be substantially reduced by approximately 30%, in comparison to pure wheat flour or the mixture samples. The composite wheat flours with microparticulated rice flour and soybean hulls produced dough matrices with improved compactness and cell structure, which were attributed to the reduced fat uptake during frying.     

Evaluation of cotton byproducts as fillers for poly(lactic acid) and low density polyethylene

Polymeric composites based on cotton burr and cottonseed bull have been prepared by melt blending and extrusion. For poly(lactic acid) (PLA) and low-density polyethylene (LDPE), addition of the fillers slightly changed the composite's thermal properties but significantly decreased the composite's mechanical properties. Heat treatment prior to extrusion resulted in composites with better tensile strength and Young's modulus. The use of maleic anhydride and peroxide only slightly improved the physical properties of the LDPE materials, but the effect was less clear for the PLA materials. The PLA-filler composites may be useful for lowering the cost of the materials in applications that can tolerate the decreased properties. In addition, the addition of fillers to LDPE might be beneficial in applications to improve stiffness or to improve biodegradability.     

线性凸规划问题的一个势降不可行内点算法

基于 Tanabe-Todd-Ye 势函数提出了求解线性凸规划问题的一个势降不可行内点算法,分析了算法的复杂度,并证明了在每一次迭代之后算法使用的势函数至少有一个正常数的下降量,从而说明了算法的多项式复杂性。