Siebsortierung von Getreide mit Hilfe der quantitativen Bildanalyse

Sieve grading of cereal kernels by means of quantitative image analysis
In former investigations several possibilities to apply computerized quantitative image analysis (CQJA) in the field of crop science have been reported. In the present studies applicability of this technique have been tested to accurately determine sieve grading of barley kernels. Accordingly, CQJA seems to be appropriate for measuring and processing digitalized image information of the respective length and thickness of grain kernels both, at high velocity and precision, and it can be done at any classification of kernel sizes. Contamination of the cereals by broken grain and/or other non-grain material can be discriminated by integrating threshold levels of minimum and maximum diameters respectively. It is argued that major advantages of the proposed automated CQJA-equipment could be (1) control of sieve grading and calibration processes of seeds and (2) sieve grading of the kernels of individual ears for breeding purposes.     

Does the exclusion of meiofauna affect the estimation of biotic indices using stream invertebrates?

Biomonitoring of rivers is usually undertaken using information based on macroinvertebrate assemblages. However, exclusion of meiofauna (i.e. invertebrates less than 0.5?mm in size) when sorting benthic invertebrates can affect the estimation of densities and other biotic indices. In the present study, the effect of excluding the less than 0.5?mm fraction of invertebrates on estimation of benthic invertebrate indices was investigated in the Naro Moru River, Kenya. The Shannon–Wiener diversity index, Pielou’s evenness index, a multimetric index, Simpson’s diversity index, Margalef’s diversity index, mean invertebrate density, taxa richness, and Ephemeroptera, Plecoptera and Trichoptera (EPT) densities were determined. Only mean invertebrate and EPT densities differed significantly between the greater than 0.5?mm and total fractions. In conclusion, exclusion of meiofauna from invertebrate samples can affect the estimation of some stream invertebrate biotic indices.     

蚯蚓分离方法与设备的研究现状

蚯蚓以秸秆、畜禽粪便、城市污泥为食,广泛用于处理有机固体废弃物。目前养殖后期蚯蚓活体、蚯蚓粪和养殖基料分离采收工作的效率低、劳动力成本高、缺乏自动化机械设备成为制约蚯蚓养殖业发展的瓶颈问题之一。综述了目前国内外蚯蚓分离常用的光分离法、热刺激法、电刺激法和机械分离等工程工艺方法以及分离设备在实际生产中的应用现状,探讨了目前蚯蚓养殖成熟之后实际分离采收过程中面临的主要问题,并简要分析了蚯蚓分离的意义及未来研究方向,以期为我国蚯蚓规模化养殖过程中分离采收工艺技术的改进与设备设计提供参考。     

南方林区林火阻隔网络建设探讨

随着林业的发展,南方森林资源得到有效保护,其林下可燃物也不断增加,森林火灾增多;分析南方林区的特点,提出营建林火阻隔网络,将森林有效地进行分隔、保护,降低森林火灾发生的几率和受损率。     

关于水泥混凝土路面裂缝原因分析及防治措施

本文明确的指出砼路面出现裂缝的诸多因素和防治的措施,并指出了若干具体的技术上的实施手段。     

A SIMPLE METHOD OF SEPARATING FRINGES IN HOLOPHOTOELASTICITY

A simple method of separating fringes has been discussed. Only setting a piece of depolarizable tracing paper in the common object beam path of holo-photoelasticity and using the differential-load double exposure method,the separate and non-modulated isopachics are obtained.     

The Harmony of Cap- tassels Graph M(2m+ 1,t,G)

This paper propored a concept of cap- tassels graph and illustrated that M(2m+ 1,t,G) is harmonious when n=2m+ 1 and G is strong harmonious.     

山苍子油减压蒸馏分离柠檬醛的工艺过程模拟

借助Aspen Plus模拟软件,采用改进基团贡献法(UNIFAC-DMD)对山苍子(Litsea cubeba)油蒸馏平衡分离柠檬醛的工艺进行了模拟计算.在考察各组分特性的基础上,分析了山苍子油中各组分与柠檬醛在0.24 kPa压力下的二元系统汽液相平衡图,构建了两级蒸馏分离器的工艺流程图,然后对一、二级蒸馏分离器的蒸馏压力和蒸馏温度进行了灵敏度分析,结果表明,一、二级蒸馏压力为0.24 kPa、一级蒸馏温度为50 ℃、二级蒸馏温度为58℃时,馏余物中柠檬醛含量能达到93.35％,柠檬醛的总收率为31.63％.     

分子筛对磷氮阻燃胶合板协效作用的研究

采用单因素法分析了分子筛类型及用量对磷氮阻燃剂浸渍杨木单板制备的胶合板的阻燃性能和胶合性能的影响。研究结果表明:分子筛在磷氮阻燃胶合板中显示出良好的协效阻燃作用。加入量为1%时就能够显著提高阻燃胶合板的阻燃性能,不同类型分子筛对阻燃性能的提高程度依次为4A>5A>13X>3A;分子筛在协效阻燃的同时,还可以提高阻燃胶合板的胶合强度。分子筛加入量为3%时阻燃胶合板的胶合强度提高最大,各类型分子筛对胶合强度的提高程度依次为13X>5A>4A>3A。     

介孔分子筛固定化海藻糖合酶的研究

[目的]对介孔分子筛固定化海藻糖合酶进行研究。[方法]以基因工程菌所产海藻糖合成酶为材料,利用介孔分子筛MCM-41作为载体固定化海藻糖合成酶,并对固定化条件和固定化前后的海藻糖合酶性质进行比较研究。[结果]海藻糖合成酶可通过物理吸附法固定于介孔分子筛MCM-41孔道中,在pH为3,给酶量为62.5 mg/g的条件下,固定12 h时可得到最佳固定化效果;与游离海藻糖合酶相比,固定化后的海藻糖合酶pH稳定性和热稳定性明显改善,并具可重复操作性,有利于酶的使用和储放。[结论]该研究为开发新的固定化海藻糖合成酶提供了理论依据。