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Soil respiration in paludified forests of European Russia

Journal of Forestry Research 2020年第5期31卷 1939-1948页

作者： dmitry ivanov Fedor Tatarinov Julia Kurbatova A.N.Severtsov Institute of Ecology and Evolution RAS Leninsky Prospekt 33MoscowRussia 119071 Weizmann Institute of Science Herzl St 23476100 RehovotIsrael

Soil respiration studies in paludified forests of the European part of Russia are quite rare in comparison with those of open peat bogs,which make long-term observations in this region highly *** this study,soil CO2 emissions were measured by the close chamber method in different microlandscapes of paludified *** four summer seasons with different environments,soil respiration ranged from 1078 to 248 mg CO2 m^-2 h^-1 in a paludified spruce forest site with coarse woody debris to 659–820 mg CO2 m^-2 h^-1 in a paludified boggy pine *** most intensive soil respiration was observed during the hot summer of 2013 and the lowest in the hot and humid summer of *** total soil CO2 emissions in paludified forests in 2015–2016 were approximately 2000–3000 g CO2 *** the year,the lowest CO2 emission values were observed from November to April(14–84 mg CO2 m^-2 h^-1)and the maximum were in July and August(522–1205 mg CO2 m^-2 h^-1).The contributions of CO2 emissions in the cold November–April period were 6–8.5%.The impacts of temperature on soil respiration were higher(r2=0.45–0.57)than those of groundwater levels(r^2=0.17–0.49).Soil respiration in the paludified spruce forest and in the pine bog generally were higher than emissions from ecosystems with similar hydrothermal conditions in the boreal zone.

关键词： Carbon flux Chamber measurements CO2 emission Peatlands Southern taiga

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Manufacturer encroachment and carbon reduction decisions considering cap-and-trade policy and retailer investment

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Frontiers of Engineering Management 2024年第2期11卷 326-344页

作者： Pengpeng YUAN Jiasen SUN dmitry ivanov Business School and Dongwu Think Tank Soochow UniversitySuzhou 235031China Berlin School of Economics and Law Berlin 999035Germany

Low-carbon regulation and market competition present new opportunities and challenges for supply chain firms,emphasizing the significance of carbon reduction and channel encroachment in enhancing *** study formulates various game models to evaluate manufacturers’encroachment strategies(with or without encroachment)under different conditions of low-carbon investment by *** investigates the operational decisions and carbon abatement strategies of firms under various *** findings reveal that encroachment elevates unit abatement levels but decreases wholesale prices and retailer profits when unit encroachment costs are below certain *** contrast,the manufacturer consistently benefits from channel ***-initiated low-carbon investments can motivate manufacturers to reduce emissions.A lower carbon price potentially offers financial advantages to retailer engaging in such ***,the likelihood of reduced environmental damage postchannel encroachment,compared to preprofessional encroachment,increases when the retailer invests in low-carbon *** retailer’s profit is inversely related to the carbon price,and a higher carbon price can strengthen the incentive effect of low-carbon investment on the manufacturer’s abatement endeavors.

关键词： carbon cap-and-trade channel encroachment emission reduction low-carbon investment

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Variations in defect substructure and fracture surface of commercially pure aluminum under creep in weak magnetic field

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Chinese Physics B 2017年第12期26卷 427-431页

作者： Sergey Konovalov dmitry Zagulyaev 陈希章 Victor Gromov Yurii ivanov Samara National Research University Samara 443086 Russia Wenzhou University Wenzhou 325035 China Siberian State Industrial University Novokuznetsk 654007 Russia Institute of High Current Electronics of the Siberian Branch of the Russia Academy of Sciences Tomsk 634055 Russia

Commercially pure polycrystalline aluminum of grade A85, as a test material, is investigated. Using scanning and transmission electron microscopy the aluminum fine structure and fracture surface are analyzed. Fractures are studied in the regime of creep with and without a simultaneous effect of 0.3-T magnetic field. It is found that the application of a magnetic field in a linear stage of creep leads to substructure imperfection increasing. Furthermore, the magnetic field effect on aluminum in the process of creep causes the average scalar density of dislocations to increase and induces the process of dislocation loop formation to strengthen. Fractographic investigation of the fracture surface shows that in the fibrous fracture zone the average size of plastic fracture pits decreases more than twice under creep in the condition of external magnetic field compared with in the conventional experimental condition. In a shear zone, the magnetic field causes the average size of fracture pits to decrease. Experimental data obtained in the research allow us to conclude that the magnetic field effect on aluminum in the process of creep leads to the fracture toughness value of the material decreasing, which will affect the state of defect substructure of the volume and surface layer of the material. The influence of the magnetic field is analyzed on the basis of the magneto-plasticity effect.

关键词： aluminum magnetic field creep structure

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Expanded Porphyrin Exhibiting Off-Centered Out-of-Plane Coordination to Dysprosium

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CCS Chemistry 2024年第7期6卷 1731-1738页

作者： dmitry I.Nazarov Jorge Labella Alexey V.Kuzmin Maxim A.Faraonov Evgenii N.ivanov Salavat S.Khasanov Tomas Torres Mikhail K.Islyaikin Dmitri V.Konarev Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS 142432 Chernogolovka Department of Organic Chemistry Universidad Autonoma de Madrid28049 Madrid Institute of Solid-State Physics RAS 142432 Chernogolovka Research Institute of Macroheterocycles Ivanovo State University of Chemistry and Technology15300 Ivanovo G.A.Krestov Institute of Solution Chemistry of the Russian Academy of Sciences 153045 Ivanovo Institute for Advanced Research in Chemical Sciences Universidad Autonoma de Madrid28049 Madrid IMDEA-Nanociencia 28049 Madrid

The complexation of high-spin lanthanides to porphyrinoids is a powerful strategy for the development of advanced molecular *** this context,the use of expanded porphyrinoids remains elusive since their coordination chemistry is challenging to ***,taking inspiration from on-surface chemistry,we explored the coordination of Dy^(3+)to a six-membered porphyrinoid,namely,the hemihexaphyrazine ***,we observed the selective formation of a mono-nuclear off-centered,out-of-plane H_(2)Hhp-Dy^(3+)complex when performing the complexation under reductive *** this reaction,the oxidation state of the macrocycle did not *** X-ray diffraction analysis,we found that the coordination number of Dy in this complex was *** macrocycle cocrystallized with decamethylcobaltocene(Cp_(2)^(*)Co)molecules,giving rise to a wellordered solid-state packing,governed byπ-π*** a result of this organization,a small magnetic coupling between the neighboring molecules was *** in all,this work provides key insights into the coordination of magnetically active metals with expanded porphyrinoids,thus motivating the development of advanced spintronic devices.

关键词： porphyrins dysprosium macrocycle coordination chemistry magnetism

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