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  • 1
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    A method of measuring iron content in Chinese fir leaf and root tissues by using an automatic chemical analyzer (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-12-20
    Description: This paper discusses a new method for determining the iron content in Chinese fir leaves and roots using a SmartChem200 automatic chemical analyzer. With a pH value of 4-5, Fe 3 + was reduced to Fe 2 + by hydroxylamine hydrochloride, and Fe 2 + and 1,10-phenanthrolinemonohydrate generated an orange complex. The iron content was calculated based on the absorbance measured at a wavelength of 510 nm. The absorbance is directly proportional to the Fe 2 + content within a certain concentration range of Fe 2 +. The absorbance had a good linear relationship with the Fe 2 + content in the range of 0.01 mgL −1 to 5 mgL −1 ; the linear regression equation of the standard curve was Y=0.0632*X-0.00002, and the correlation coefficient was 1.0000. The method is convenient and rapid, and the experimental results were reliable.
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
    Published by Institute of Physics (IOP)
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  • 2
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    Research on Coordinated Development Strategy of Northeast Power Grid and National Energy Grid (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-06-16
    Description: In the new era, the Northeast power grid is facing a series of opportunities and challenges. In this paper, the strategy of “complementary”, “transmission” and “mutual benefit” coordinated development of Northeast China Power Grid and national energy grid is formulated based on the relevant national policy planning; Considering the difference of unique geographical location, natural resources, human resources, technology and other factors of the northeast and other areas; taking into account the development situation and future development needs of all regions, formed a coordinated development strategy layout, covering the unified planning, new energy development, peaking capacity construction, power substitution and talent support. It is beneficial to improve the efficiency of the national energy allocation and utilization, and to solve the practical problems faced by the power grid, so as to realize the coordinated development of the Northeast Power Grid and the national energ...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 3
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    The Influence of New Environment on the Development of Northeast Electric Power Industry (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-06-16
    Description: Electricity is the foundation of the national economy, and the influence on the social and economic development is self-evident. At the same time, the power industry is also deeply affected by the economy and society. Firstly, this paper introduces the new environment faced by Northeast power industry from four aspects: power system reform, bilateral stochastic system, technological innovation and related policies; then It deeply analyzed the impact of the new environment on the development of the Northeast Power Industry from the above four angle; finally, the opportunities and challenges of the new environment for the future development of the Northeast power industry are summarized. To pave the way for the formulation of Northeast power grid development planning, and it is also helpful to improve and scientificity and accuracy of the Northeast Power Grid Planning.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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