Stage-Related Defense Response Induction in Tomato Plants by Nesidiocoris tenuis

The beneficial effects of direct predation by zoophytophagous biological control agents (BCAs), such as the mirid bug Nesidiocoris tenuis, are well-known. However, the benefits of zoophytophagous BCAs’ relation with host plants, via induction of plant defensive responses, have not been investigated until recently. To date, only the females of certain zoophytophagous BCAs have been demonstrated to induce defensive plant responses in tomato plants. The aim of this work was to determine whether nymphs, adult females, and adult males of N. tenuis are able to induce defense responses in tomato plants. Compared to undamaged tomato plants (i.e., not exposed to the mirid), plants on which young or mature nymphs, or adult males or females of N. tenuis fed and developed were less attractive to the whitefly Bemisia tabaci, but were more attractive to the parasitoid Encarsia formosa. Female-exposed plants were more repellent to B. tabaci and more attractive to E. formosa than were male-exposed plants. When comparing young- and mature-nymph-exposed plants, the same level of repellence was obtained for B. tabaci, but mature-nymph-exposed plants were more attractive to E. formosa. The repellent effect is attributed to the signaling pathway of abscisic acid, which is upregulated in N. tenuis-exposed plants, whereas the parasitoid attraction was attributed to the activation of the jasmonic acid signaling pathway. Our results demonstrate that all motile stages of N. tenuis can trigger defensive responses in tomato plants, although these responses may be slightly different depending on the stage considered.     

熔渣泡沫图像的边界提取算法

本文通过大量的实验,综合运用图像处理和模式识别技术,深入、系统的研究了自动识别的理论和技术.针对目前研究现状,本文提出一种基于数字图像处理技术的高炉泡沫渣图像边界检测方法.该方法由x射线穿透高炉到影像增强器,CCD摄像头将采集到的溶渣泡沫影像经图像采集卡转换成数字图像,由计算机经图像处理后得到溶渣泡沫的轮廓线,并由轮廓线背景的刻度线直接看出溶渣泡沫各处的实际高度.实验结果表明,该检测方法在原理上是可行的,对于在现场实现溶渣泡沫高度的在线检测具有指导意义.     

Metabolomics Mechanism and Lignin Response to Laxogenin C,a Natural Regulator of Plants Growth

Laxogenin C (LGC) is a natural spirostanol deriving from plant hormone which has shown growing regulation similar to those of brassinosteroids. In the present study, LGC showed a promoting effect on tomato seed germination and seedling growth in a dose-dependent manner. We applied LC-MS/MS to investigate metabolome variations in the tomato treated with LGC, which revealed 10 differential metabolites (DMs) related to KEGG metabolites, associated with low and high doses of LGC. Enrichment and pathway mapping based on the KEGG database indicated that LGC regulated expressions of 2-hydroxycinnamic acid and l-phenylalanine to interfere with phenylalanine metabolism and phenylpropanoids biosynthesis. The two pathways are closely related to plant growth and lignin formation. In our further phenotypic verification, LGC was confirmed to affect seedling lignification and related phenylpropanoids, trans-ferulic acid and l-phenylalanine levels. These findings provided a metabolomic aspect on the plant hormone derivates and revealed the affected metabolites. Elucidating their regulation mechanisms can contribute to the development of sustainable agriculture. Further studies on agrichemical development would provide eco-friendly and efficient regulators for plant growth control and quality improvement.     

电石渣浆处理及澄清水回收系统工艺改造

通过对乙炔工段电石渣浆系统进行改造与优化,将电石渣浆澄清水全部回收利用,实现了工业废水零排放。节约了水资源,降低了生产成本,取得了显著的环保效益和经济效益。     

氨碱法纯碱生产中废液及碱渣的综合利用

介绍了国内外氨碱法纯碱厂废液及碱渣的综合利用情况。     

从茶籽饼中提取茶皂素的生产工艺研究

本文就从茶籽饼③中提取茶皂素的生产工艺进行了比较研究，通过对五种不同提取方法的比较，综合了水浸法和有机溶剂法的优点，总结出了一种新的提取工艺──水提──醇萃法。可得到纯度为９５％的茶皂素，并且成本低，产率高     

冷破番茄酱在保质期内品质变化研究

文章选取我国主要番茄产区12个220 L钢桶包装的36%~38%冷破番茄酱样品,对比分析番茄酱产品出厂检验指标与存放1年、2年后浓度、粘度、pH、色差指标变化。分析结果表明:220 L钢桶装36%~38%冷破番茄酱产品在2年的保质期内,产品浓度值上升0.083%,粘度值、pH分别下降0.36 cm/30 s和0.038,色差值下降0.15。     

创制杀菌剂啶菌恶唑生物活性及应用研究(Ⅰ)--番茄灰霉病

啶菌恶唑(试验代号:SYP-Z048)是一种结构新颖、作用方式独特的新型杀菌剂,具有保护、治疗效果及良好的内吸传导性。对子囊菌、担子菌和半知菌引起的多种植物病害具有良好的防治作用。啶菌恶唑对番茄灰霉病具有很高的离体杀菌活性和优异的田间防治效果。室内离体试验啶菌恶唑对番茄灰霉病(Botrytiscinerea )的EC50值为0.206 /ml;1998～2002年多点的田间小区试验结果表明:啶菌恶唑在处理剂量200～400 g a.i./hm2、施药2～3次、间隔期6～8d的条件下对番茄灰霉病有良好的防治效果,防效优于目前生产上推广使用的多菌灵、腐霉利、菌核净、嘧霉胺等常规杀菌剂。     

含铜废渣中回收CuSO4·5H2O工艺的研究及应用

针对不同工业含铜废渣的成分特点,分别研究了焚烧氧化法和混酸浸取法两种回收工艺,阐明工艺原理,优化工艺流程,并进行了实际中试生产。结果证明,焚烧氧化法和混酸浸取法两种工艺,平均回收率分别为91．5％和94．6％,具有较高的实际效益,所制产品经GB437-80分析检测,质量达工业一级品标准。本工艺与大工业制取CuSO4·5H2O相比,具有设备简单,易于操作,本地资源可进行深度加工等特点。