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Chemical characterization and antioxidative properties of Polish variety of Morus alba L. leaf aqueous extracts from the laboratory and pilot-scale processes

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Agricultural Sciences 2013年第5期4卷 141-147页

作者： Ewa Flaczyk Joanna Kobus-Cisowska Monica Przeor jozef Korczak Marian Remiszewski Eugeniusz Korbas Maciej Buchowski Department of Food Service and Catering Poznan University of Life Sciences Wojska Polskiego Poznan Poland Institute of Agricultural and Food Biotechnology Department of Food Concentrates and Starch Product Starolecka Poznan Poland Vanderbilt University Department of Medicine Nashville Tennessee USA

White mulberry tree (Morus alba L) is cultivated throughout Asia and Europe, including Poland. The leaves and root bark preparations from Morus alba have been used in traditional phytomedicine. The objective of the present study was to compare chemical composition and antioxidative activity of aqueous extracts prepared from Polish variety of Morus alba leaves at the laboratory (L) and pilot plant scale (PP) conditions. Proximate composition, phenolic acids profile (HPLC/MS), flavonol glicosides (HPLC/ MS), polyphenols (Folin-Ciocalteu assay), and the antioxidant activity (ABTS and DPPH assay) of the extracts were determined. The main phenolic compounds were identified as gallic, protocatechuic, phydroxybenzoic, vanillic, chlorogenic, caffeic, p-coumaric, ferulic, and sinapic acids. Chlorogenic acid was the main phenolic constituent of both extracts. The flavonols fraction contained rutin, quercetin 3-β-D-glucoside, and kaempferol 3-β-D- glucopyranoside. Total concentration of phenolic compounds were 7.9 g and 14.4 g gallic acid equivalent/100 g extract, and antioxidant activity was 137.1 and 214.1 μMol Trolox equivalent/g dry weight for the PP and L extracts, respectively. We concluded that current pilot plant process is less efficient than laboratory process at the aqueous extraction of bioactive components from Morus alba dried leaves. Potential improvements may include increasing efficacy of the extraction, decreasing losses of bioactive components during the process, or both.

关键词： Morus Alba Leaves Pilot Plant Scale Antioxidant Activity Phenolic Acid Flavonols HPLC

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神经网络预测矿震危险性

煤炭科技 2007年第4期28卷 71-74页

作者： jozef KABIESZ 窦林名波兰矿山研究总院

开采冲击危险煤层时,需要对能量大于等于104 J矿震发生的时间和地点进行预测。但目前所预测的结果不能满足现场要求。依据波兰一个长壁工作面的矿震事件,研究了神经网络系统中输入数据类型和形式对矿震预测效果的影响,确定了提高预测效... 详细信息

开采冲击危险煤层时,需要对能量大于等于104 J矿震发生的时间和地点进行预测。但目前所预测的结果不能满足现场要求。依据波兰一个长壁工作面的矿震事件,研究了神经网络系统中输入数据类型和形式对矿震预测效果的影响,确定了提高预测效果的方法。实践证明,采用神经网络技术可以对矿震危险性进行预测。

关键词：震动神经网络危险性预测

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设计师仍然喜欢选择碲镉汞

红外 1998年第5期19卷 1-7页

作者： jozef Piotrowski 贡树行波兰华沙市VIGO系统开发部

1.引言在过去的三十多年中,碲镉汞(Hg_(1-x)Cd_xTe)已经成为制造中波和长波(λ=3～30μm)红外光电探测器的最重要的半导体材料。在硅和砷化镓以后,碲镉汞就是最重要的半导体之一。就已知材料而言,还没有那一种能在基本性能和可塑性上... 详细信息

1.引言在过去的三十多年中,碲镉汞(Hg_(1-x)Cd_xTe)已经成为制造中波和长波(λ=3～30μm)红外光电探测器的最重要的半导体材料。在硅和砷化镓以后,碲镉汞就是最重要的半导体之一。就已知材料而言,还没有那一种能在基本性能和可塑性上超过它。而且,Hg_(1-x)CdxTe的晶格参数几乎恒定不变,这对于根据复式异质结结构来制造新的器件尤其重要。最初,Hg_(1-x)CdxTe的成功仅仅是因为利用组分X=0.

关键词：碲镉汞红外探测器红外材料半导体

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电网企业应急物流网络布局优化设计研究

物流工程与管理 2018年第9期40卷 68-70,52页

作者：王波郭璘 jozef Ristvej 宁波工程学院浙江宁波315211

应急物流作为电网企业应急体系中重要的一环,对缓解自然灾害发生后的大面积停电事故至关重要,尤其是应急物流网络布局优化设计对大幅度提升电力应急救援而言重要性更是不言而喻,对此展开谈论和研究具有积极的理论意义,也是我国电网企业... 详细信息

应急物流作为电网企业应急体系中重要的一环,对缓解自然灾害发生后的大面积停电事故至关重要,尤其是应急物流网络布局优化设计对大幅度提升电力应急救援而言重要性更是不言而喻,对此展开谈论和研究具有积极的理论意义,也是我国电网企业应急实践的根本要求。文中以电网企业为研究对象,对其应急物流网络布局优化设计的特征、现状、必要性进行了深入的研究,最后,切实提出电网企业应急物流网络布局优化设计的措施,旨在促进我国电网企业健康、长远发展。

关键词：电网企业应急物流网络布局设计

Active Magnetic Bearings Control

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Active Magnetic Bearings Control

第二十九届中国控制会议

作者： jozef RITONJA Botjan POLAJZER Drago DOLINAR Bojan GRAR Peter CAFUTA University of Maribor Faculty of Electrical Engineering and Computer Science

In the paper a decentralized control for active magnetic bearings is *** the numerical evaluation of dif-ferent control algorithms a mathematical model of the controlled plant is *** this reason basic characteristics and fundamental operation principle of magnetic levitation as well mathematical model of the rigid shaft are *** control systems for magnetic levitations are *** majority of industrial applications of active magnetic bearings were still based on conventional PID control *** control system design is presented as rule based *** sensitivity of control system on supplementary dynamics,parameter variations and measurement noise is *** active magnetic bearing laboratory system is *** obtained simulation and experimental results are compared.

关键词： Active Magnetic Bearings Mathematical Model Control PID Controller

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以数字化,赋能新生

汽车之友 2021年第7期 20-21页

作者： Klaus Zyciora jozef Kaban 大众汽车集团设计部门大众汽车乘用车品牌设计部门

AF:用户体验一直是互联网企业经常谈及的话题,很多人认为这是汽车设计的弱项,更多情況下用户体验要服从功能设计,您是否认同这种说法?大众汽车集团在设计的角度在用户体验方面做了哪些努力?

关键词：用户体验功能设计大众汽车集团互联网企业数字化

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过氧化物硫化的橡胶胶料

橡胶参考资料 1995年第9期25卷 47-55页

作者： Carl Theo jozef 乔建新

本发明叙述的是改善了物理性能的橡胶胶料,具体地说是过氧化物硫化的胶料,硫化在柠康酰亚胺化合和自由基清除剂存在下进行,以便控制焦烧时间。在橡胶件注射模压和连续硫化过程中,尽可能长时间地保持模压胶料在挤出机中和传送设备中的可... 详细信息

本发明叙述的是改善了物理性能的橡胶胶料,具体地说是过氧化物硫化的胶料,硫化在柠康酰亚胺化合和自由基清除剂存在下进行,以便控制焦烧时间。在橡胶件注射模压和连续硫化过程中,尽可能长时间地保持模压胶料在挤出机中和传送设备中的可加工性,即易流动性。

关键词：过氧化物硫化橡胶胶料

<i>Acacia etbaica</i>as a Potential Low-Cost Adsorbent for Removal of Organochlorine Pesticides from Water

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Journal of Water Resource and Protection 2015年第3期7卷 278-291页

作者： Abraha Gebrekidan Mekonen Teferi Tsehaye Asmelash Kindeya Gebrehiwet Amanual Hadera Kassa Amare jozef Deckers Bart Van Der Bruggen Department of Chemistry Mekelle University Mekelle Ethiopia Department of Biology Mekelle University Mekelle Ethiopia Department of Microbiology Mekelle University Mekelle Ethiopia Department of Land Resource Management & Environmental Protection Mekelle University Mekelle Ethiopia Department of Earth Science Mekelle University Mekelle Ethiopia Department for Earth and Environmental Science KU Leuven Leuven Belgium Department of Chemical Engineering Process Engineering for Sustainable Systems (ProcESS) KU Leuven Leuven Belgium

The presence of pesticides in the environment is of great concern due to their persistent nature and chronic adverse effect on human health and the environment. Water bodies are subject to pollution by organochlorine pesticides, especially in developing countries, where water pollution is a key sustainability challenge. Hence, activated carbon is considered a universal adsorbent for the removal of organochlorine pollutants from water. Activated carbon from Acatia etbaica was prepared using traditional kilns with low investment costs. Pesticides such as aldrin, dieldrin and DDT were selected for adsorption because of their common usage in agricultural and malaria control activities and may occur in high concentrations in surface waters that are used as drinking water sources. The effect of the adsorbent dose and initial concentration were investigated. To describe the equilibrium isotherms the experimental data were analyzed by the Langmuir and Freundlich isotherm models. The Freundlich model gave the best correlation with the experimental data. Activated carbon prepared from Acacia etbaica was found to be an effective and low-cost alternative for the removal of organochlorine pesticides from aqueous solutions. The preparation method allows the use of this material by local communities for effective remediation of pollution by pesticides.

关键词： Acacia etbaica Activated Carbon Organochlorine Pesticides Adsorption Water Purification

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顶板岩层动力事件发生机理与防治方法

煤炭科技 2008年第1期29卷 55-58页

作者： Jan DRZEWIECKI jozef KABIESZ 窦林名波兰矿山研究总院

在长壁开采过程中不可避免地会对顶板岩层产生强烈扰动,这种扰动可能扩展到开采区域以外的地方,并且岩石变形破坏的形式也不相同。当岩层坚硬时,储存的能量可能频繁地以高能量微震形式释放出来。当岩层本身所储存的能量无法缓慢释放时,... 详细信息

在长壁开采过程中不可避免地会对顶板岩层产生强烈扰动,这种扰动可能扩展到开采区域以外的地方,并且岩石变形破坏的形式也不相同。当岩层坚硬时,储存的能量可能频繁地以高能量微震形式释放出来。当岩层本身所储存的能量无法缓慢释放时,矿震现象常常会发生。研究表明,岩层本身所储存的能量与岩层本身的尺寸有密切的关系。因此,可以采用一些方法或措施来减少采矿诱发的矿震。该措施基于人为的方法破坏储存弹性能的岩层结构,其中最有效的方法之一就是采用定向水压致裂技术。

关键词：顶板岩层动力事件矿震定向水压致裂