甲壳胺作为果汁澄清剂的应用研究

应用甲壳胺作为果汁澄清剂的研究结果表明,在640nm处,甲壳胺浓度320ppm,4小时后梨汁透光率>92％;加入甲壳胺480ppm,6小时后苹果汁透光率>90％;甲壳胺浓度240ppm的菠萝汁,6小时后透光率>85％。在澄清过程中,果汁的总糖度和pH无明显变化。澄清后的果汁,室温贮存150天仍清澈透明,无沉淀不浑浊,保持浓郁的原果汁风味。     

辣椒种子湿干间隙处理的生理生化效应

本试验研究了湿干间隙处理对辣椒种子活力及生理生化的效应。试验结果表明,湿干间隙处理能有效抑制辣椒种子可溶性物质的外渗,增加种子内蛋白质的合成,使其芽期过氧化氢酶活性增强、高峰期提前,从而有效地提高了辣椒种子活力。     

气相色谱法测定水果保鲜期中的二氧化碳

本文用气相色谱仪热导池检测器和活性碳柱测定水果在保鲜期新陈代谢过程中放出的二氧化碳.当柱温在150℃,桥电流90mA时,二氧化碳出峰时间仅为1.27分钟.本法操作方便,使测试结果的准确度有所提高.     

人参果的抗心律失常作用

本工作以氯仿为诱发小鼠心律失常模型，研究了鲜人参果提取物对小白鼠心律的影响，结果表明，人参果具有明显的抗心律失常作用，有效率为７０％，提示人参果有重要开发价值．     

Image Semantic Automatic Annotation by Relevance Feedback

A large semantic gap exists between content based index retrieval (CBIR) and high-level semantic, additional semantic information should be attached to the images, it refers in three respects including semantic representation model, semantic information building and semantic retrieval techniques. In this paper, we introduce an associated semantic network and an automatic semantic annotation system. In the system, a semantic network model is employed as the semantic representation model, it uses semantic keywords, linguistic ontology and low-level features in semantic similarity calculating. Through several times of users' relevance feedback, semantic network is enriched automatically. To speed up the growth of semantic network and get a balance annotation, semantic seeds and semantic loners are employed especially.     

狭叶四照花果实性状变异分析

对分布于鄂西南的狭叶四照花果实测定果重、横径、纵径、果穗梗长、果形指数等指标,结果表明:(1)果实性状与果重的关联程度为果形指数>果实横径>果穗梗长>果实纵径;(2)产自利川市花板溪的果实性状综合评价最好.     

浅谈迁安市园林绿化树种的选择

通过对迁安市园林绿化树种的普查，结合迁安市的气候、土壤等立地条件，叙述了迁安市园林绿化树种选择的原则和初步思路，并对迁安市园林绿化树种的选择提出了一些建议。     

三种消毒剂对番茄种子萌发及幼苗生长的影响

三种消毒剂灭菌的番茄种子，其发芽系数差异明显，氯化汞的最高，其次为双氧水，次氯酸钠最低，而苗高、苗重、子叶重、子叶开度，叶绿素含量则相反，依次为次氯酸钠、双氧水、氯化汞。三种消毒剂灭菌的子叶，离体培养时也有明显区别。     

Contents and distribution of rare earth elements in wheat seeds

Contents of 15 rare earth elements (REEs) in the seeds of 60 breeds of wheat have been analyzed by the inductively-coupled plasma mass spectrometry (ICP-MS). The distribution pattern of contents of REEs in wheat seeds has been observed and compared with that in soils. Comparison with literature data has also been made. The results show that the background of REEs in wheat seeds is 10-11-10-8 g.g-1, 3-4 levels lower than in soils. The distribution pattern is light REEs higher in contents and slight Eu-anomaly, similar to that in soils. The data obtained in this study can accurately represent the background content of REEs in wheat seeds.     

草莓果实硬度遗传和选择研究

通过对草莓８个杂交组合实生果实的果实硬度分析，探讨了果实硬度在杂交育种中的遗传情况及选择问题。结果表明：果实硬度属于多基因控制的数量性状，非加性效应在性状遗传中起着主要作用，组合间果实硬度的遗传力为０．４４～０．６７，平均广义遗传力为０．５７。