The Arrhenius plot for 39At released uring step heating of a sample containing a distribution of diffusion domains will depart from a straight line in ways that depend on the domain size distribution and the heating schedule used to extract he 39At. In a new series of experiments we make use of the heating schedule effect to confirm the multidomain nature of several alkali feldspar samples. We ...

The paper proposes a study of the phenomenology driving the ageing mechanisms of electrochemical double layer supercapacitors (SCs) during their most common operating conditions. In particular, the paper focuses on the so-called life endurance (LE) and power cycling (PC) stresses. The paper first provides a description of the variables governing the SC behaviour at the microscopic scale (i.e., ...

A purely arithmetical model of early naked-eye astronomy is developed. The astronomical origin of the Mayan Calendar (the 260-day Tzolk’in, the 365-day Haab’, the 3276-day Kawil-direction-color cycle and the 1872000-day Long Count Calendar) is demonstrated and the position of the Calendar Round at the mythical date of creation 13(0).0.0.0.0 4 Ahau 8 Cumku is calculated. Evidence shows that this...

Plastic mulching, given its positive effects on temperature and water retention, has been widely used to solve shortages nutrient scarcity in rainfed agricultural soils. This practice affects the physical chemical processes of soil, including carbon nitrogen cycling. However, research into microbe-mediated cycling soil with plastic mulching is still limited. In this study, structures functions ...

We thank Prof. Gabriel Filipelli for his kind words regarding this study and are very pleased to see that he appreciates the implications, specifically regarding the possible over-interpretation of reactive (Ca-)P burial based on chemical analysis of sedimentary records. We have also taken to heart his criticism that the final section (6.3) on Fe and S cycling does not seem to fit with the core...

....................................................................................................................... page 3 Introduction ................................................................................................................. page 4 Wetlands: Definitions and Origins .............................................................................. page 7 Chemical and Nut...

Where ρ0, α0, ∆T , η, κ are dimensional reference values of density of the background mantle, thermal expansivity, temperature difference between core-mantle boundary and surface, reference viscosity at temperature T = 0.5 (non-dimensional), and thermal diffusivity, respectively. g and h are dimensional gravitational acceleration and thickness of mantle, respectively. 1 Chemical complexity of h...

2D V 2 O 5 IO films with various pore sizes and phases are fabricated, in which small pores buffer stress-induced pulverization but fasten chemical dissolution, while introducing a amount of 6 13+ y into improves electrochromic electrochemical cycling stability.