The corrected values of the work function (WF) presented by the author in Vacuum, 1997, 48 , 257 are given. It is shown that the values of WF of transition metals calculated from the Brodie's expression agree both with those measured for polycrystalline samples and those calculated ab ...
The corrected values of the work function (WF) presented by the author in Vacuum, 1997, 48 , 257 are given. It is shown that the values of WF of transition metals calculated from the Brodie's expression agree both with those measured for... KF Wojciechowski - 《Vacuum》 被引量: 5发表...
A formula for surface energy, , in terms of electron work function, , and the effective number of free electrons per atom, z , is given. The basis for its derivation were the known equations of the free electron theory of metals and the known advanced Frenkel's relation between electron ...
University campuses usually have more trees and can provide various ecosystem services. However, there are few reports on tree ecosystem services of Chines
How is sustainability defined in analyses of policies for livestock systems? Only a few studies include a specific definition of sustainability (Table2). While this is likely to be related to difficulties in defining the term (Creemer et al.2019), it may also be linked to the concept’s ub...
Trophic transfer is then the main pathway for the intake of both Cd and Hg, and these metals bioaccumulate in higher trophic level consumers (Eisler 1987, Cossa et al. 1990, Koyama et al. 2000, Lahaye et al. 2005). Thus, these non-essential elements may also be potential tracers of ...
Yet the environmental controls on the expression of isotope enrichment during reduction (Δ238Uanox) are poorly understood, leading to large uncertainties in interpretation of seawater records. This is particularly limiting for the Neoproterozoic, where exceptionally low inferred seawater δ238U requires ...
Royal De-cree 9/2005 [19] proposes obtaining reference values formetals.It is vital to know the background levels (reference values)for trace elements for each type of soil in each area ofstudy [20]. However, two types of reference values aredifferentiated: generic, relating to a single ...
Biomarker concentrations that were below LOD were assigned a value of LOD/2. Unlike RV95s derived previously for metals and trace elements from CHMS data, no exclusion criteria were examined for any of the POPs in this analysis as no confounders were considered to sufficiently influence biomarker...
Only group in the world to design, manufacture and support both combat aircraft (instruments of political independence) and business jets (work and economic development tools). Strategic player for the policy of national independence. Group at the vanguard of the technical and industrial revolution ...