Microorganisms , Organic Carbon , and Their Relationship with 1 Oxidant Activity in Hyper - Arid Mars - like Soils : Implications for 2 Soil

Microorganisms, Organic Carbon, and Their Relationship with 1 Oxidant Activity in Hyper-arid Mars-like Soils: Implications For

O2- ions and the Mars labeled release response.

Yen et al. (1) propose that O 2 – ions puta-tively formed in the soil of Mars, not microorganisms , represent " the most straightforward explanation " of my 1976 Viking labeled release (LR) life detection results. Data from radioactive organic nutrients added to martian soil (2), however, challenge that conclusion. In the data reported by Yen et al. [figure 3 of (1)], O 2 – radicals lose only 1...

پایداری خاکدانه‌ها در حضور کرم خاکی (Lumbricus terrestris L.) و مواد آلی مختلف در یک خاک آهکی

Although the crucial function of earthworms in improvement of soil physical properties is well -know, but very little is known of the interactive influence of earthworms and organic materials on soil properties such as soil aggregate stability, particularly in arid and semi-arid soils. The low organic matter content and the significant role of earthworms in improving physical properties of arid...

Substrate Stereo Selectivity May Be Used to Distinguish between Chemical and Biological Reactivity on Mars

In the Viking labeled release experiment, organic compounds added to the Martian soil were rapidly degraded as if the soil contained live microorganisms [1]. But failure to detect native organic carbon raised the possibility of a chemical reactivity as caused by the presence of inorganic oxidants [2, 3]. The debate between pro-life and anti-life views is likely to intensify in light of the resu...

مدل‌سازی اثر تغییر اقلیم بر انتشار دی‌اکسیدکربن خاک در مراتع خشک (جنوب ایران)

Introduction: Carbon stored in soils particularly in arid rangelands soils is the most significant carbon sink in terrestrial ecosystems. In arid rangelands, Soils have special places in both carbon sequestration and mitigate global warming. Therefore, any small change in the soil organic carbon (SOC) leads to a significant impact on the CO2 concentration in the atmosphere. Studies have shown t...