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Dualex植物多酚-叶绿素仪在水分亏缺的苹果幼苗中的应用

发布时间:2022-04-19 点击量:161

Dualex是一款源自于法国国家科学院 (CNRS)及巴黎第十一大学技术,由奥地利PESSL公司生产(原法国Force-A公司)开发的新型多功能叶片测量仪。它可同时准确测量叶片的叶绿素含量、叶片表层的类黄酮和花青素含量,适用于植物生理学和农学(如水稻叶绿素浓度,玉米氮素状况,葡萄藤等)相关研究。

其测量对象可以是单子叶植物,双子叶植物或多年生植物。这款设备简单易用,可进行实时和非破坏性测量。由于不需要校准标定和事先的样品制备,测量工作可在实验室或现场完成。此外,该设备在各种温度的和环境光照条件下均可正常使用。系统采用设计,光学传感器可进行简单、快速、无损测量叶片中的叶绿素、多酚以及花青素。

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Dualex便携式智能气象-叶绿素-花青素-黄酮醇测量仪

获得安全的供水对提高一个人的生活质量很重要。我们研究了水资源可用性对家庭每月支出的影响(因变量)与自变量之间的关系,如家庭特征、水箱大小、使用说明和施工后指导,包括与水相关的健康风险管理。该样本由301名在乌干达收集雨水的受访者组成。采用多元回归分析对数据进行分析。研究结果表明,施工后指导和储罐尺寸是重要变量。这项研究表明,在安装供水设备后,需要采取后续行动来改善健康状况,即提供有关水风险的信息,促进阅读规范,并促进信息来源的可用性和可承受性,例如补贴报纸和信息支持设备(计算机)。此外,这项研究还表明,由于供应商在水方面的支出减少,以及对缺水(如脱水)造成的与水有关的健康风险的管理,节约成本的可能性增加。总的来说,该研究揭示了促进发展中国家政策和卫生的两种可能方式:(1)确保对所有水资源提供充分的建设后指导;(2)确保家庭可持续供应充足的安全用水。

荧光测量:荧光指数由两个便携式荧光传感器Dualex®4 Scientific和Multiplex®3评估。二者被用来记录实验过程中的情况。这些设备可用于在野外自然辐射或受控室内人工辐射条件下对电厂状态进行即时评估。

Influence of water shortage on apple seedling growth under different radiation composition

Having access to a safe water supply is important to improve a person's quality of life. We examine the relationship between the influence of water availability on monthly household expenditures (the dependent variable) and independent variables such as household characteristics, tank size, usage instructions and post-construction guidance, including the management of water-related health risks. The sample consisted of 301 respondents who harvest rainwater in Uganda. A multiple regression analysis was used to analyse the data. The findings show that post-construction guidance and tank size were significant variables. This study suggests the need for a follow-up to improve health after the installation of water supply equipment, i.e., to provide information about water risks, foster reading norms and facilitate the availability and affordability of information sources, e.g., subsidised newspapers and information support devices (computers). Additionally, this study shows the possibility of increased savings due to reduced expenditures on water from vendors and the management of water-related health risks caused by a water shortage, e.g., dehydration. Overall, the study reveals two possible ways to advance policy and health in developing countries: (1) ensuring sufficient post-construction guidance for all water resources; and (2) ensuring a sustainable supply of adequate safe water in households.

Fluorescence measurements: Fluorescence indices were assessed by two portable fluorescence sensors, Dualex®4 Scientific and Multiplex®3 (Force-A, Orsay, France). They were adopted to record conditions during the experiment. These devices can be used for instant evaluation of the plant status both under natural irradiance in the field or under artificial irradiance in controlled chambers.

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Dualex 便携式智能气象-叶绿素-花青素-黄酮醇测量仪

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