Acid cleaning processes were performed on a class 100 laminar flow clean bench assembled inside a class 1000 clean room.The ultrapure water was produced by Millipore RO (Reverse Osmosis) and Milli-Q water purification...Acid cleaning processes were performed on a class 100 laminar flow clean bench assembled inside a class 1000 clean room.The ultrapure water was produced by Millipore RO (Reverse Osmosis) and Milli-Q water purification systems.The three purity grades of nitric acid used for cleaning include Merck reagent grade HNO3,Fisher 'TraceMetal' grade HNO3,and the purest Fisher 'Optima' grade HNO3.The various bottles,containers and other labware,which are in contact with the samples,are made of low-density polyethylene (LDPE) and FEP or PFA Teflon materials.The acid cleaning procedures of the bottles and other containers follow a successive four times cleaning through immersion in increasing purity of nitric acid baths at different concentrations during four weeks.The first acid bath is performed at room temperature,but the following three acid baths are heated on ceramic hotplates with a surface temperature of 45℃.In order to verify the efficiency of the acid cleaning method,cleaned bottles underwent a blank determination procedure using ELAN 6100 inductively coupled plasma spectrometry (ICP-MS).Results show that most measured trace elements are not detected and the elements detected are at very low concentrations.The blank values are comparable with that of bottles cleaned at Korea Polar Research Institute (KOPRI).Although the acid cleaning method is developed mainly for reliable measurements of trace elements in snow and ice samples,it can also be used for investigations of trace elements in other environmental samples.展开更多
LabWare，居于全球实验室信息管理系统(LIMS)和仪器集成软件供货商领先地位的公司，推出了一项具有划时代意义的、革命性的新产品-LabWare Web LIMS。LabWare Web LIMS全面包含了Web的范例，而客户无需对其现有的客户机，服务器(C／S)...LabWare，居于全球实验室信息管理系统(LIMS)和仪器集成软件供货商领先地位的公司，推出了一项具有划时代意义的、革命性的新产品-LabWare Web LIMS。LabWare Web LIMS全面包含了Web的范例，而客户无需对其现有的客户机，服务器(C／S)结构的LIMS的组态进行任何的改动。LabWare这一独创的新技术，使得用户在选择使用不同方式的LIMS时，仍采用完全相同的LIMS组态，既可选择通过Web LIMS也可选择C／SLIMS，或者这两者的组合。展开更多
In this paper,we address the need for better hands-on learning materials in computing education and the need for integrating mobile computing education into computing curricular.We propose an innovative learning appro...In this paper,we address the need for better hands-on learning materials in computing education and the need for integrating mobile computing education into computing curricular.We propose an innovative learning approach that uses state-of-the-art mobile computing technologies and devices to design a highly accessible and real-world relevant hands-on labware for computing education.The labware employs a modular design such that the learning materials can both be combined together into a single course of mobile program development and be integrated into the related computing courses as building blocks.The labware will help students understand the concepts,improve their problem solving skills,and prepare them for the mobile computing industrial workforce.The pilot modules of the labware have been presented to undergraduate students and have received positive feedbacks.展开更多
基金supported by National Natural Sciences Funds for Distinguished Young Scholar (40825017)the Chinese Academy of Sciences (SKLCS-ZZ-2008-06)
文摘Acid cleaning processes were performed on a class 100 laminar flow clean bench assembled inside a class 1000 clean room.The ultrapure water was produced by Millipore RO (Reverse Osmosis) and Milli-Q water purification systems.The three purity grades of nitric acid used for cleaning include Merck reagent grade HNO3,Fisher 'TraceMetal' grade HNO3,and the purest Fisher 'Optima' grade HNO3.The various bottles,containers and other labware,which are in contact with the samples,are made of low-density polyethylene (LDPE) and FEP or PFA Teflon materials.The acid cleaning procedures of the bottles and other containers follow a successive four times cleaning through immersion in increasing purity of nitric acid baths at different concentrations during four weeks.The first acid bath is performed at room temperature,but the following three acid baths are heated on ceramic hotplates with a surface temperature of 45℃.In order to verify the efficiency of the acid cleaning method,cleaned bottles underwent a blank determination procedure using ELAN 6100 inductively coupled plasma spectrometry (ICP-MS).Results show that most measured trace elements are not detected and the elements detected are at very low concentrations.The blank values are comparable with that of bottles cleaned at Korea Polar Research Institute (KOPRI).Although the acid cleaning method is developed mainly for reliable measurements of trace elements in snow and ice samples,it can also be used for investigations of trace elements in other environmental samples.
文摘LabWare，居于全球实验室信息管理系统(LIMS)和仪器集成软件供货商领先地位的公司，推出了一项具有划时代意义的、革命性的新产品-LabWare Web LIMS。LabWare Web LIMS全面包含了Web的范例，而客户无需对其现有的客户机，服务器(C／S)结构的LIMS的组态进行任何的改动。LabWare这一独创的新技术，使得用户在选择使用不同方式的LIMS时，仍采用完全相同的LIMS组态，既可选择通过Web LIMS也可选择C／SLIMS，或者这两者的组合。
文摘In this paper,we address the need for better hands-on learning materials in computing education and the need for integrating mobile computing education into computing curricular.We propose an innovative learning approach that uses state-of-the-art mobile computing technologies and devices to design a highly accessible and real-world relevant hands-on labware for computing education.The labware employs a modular design such that the learning materials can both be combined together into a single course of mobile program development and be integrated into the related computing courses as building blocks.The labware will help students understand the concepts,improve their problem solving skills,and prepare them for the mobile computing industrial workforce.The pilot modules of the labware have been presented to undergraduate students and have received positive feedbacks.
