Mediterranean soils are generally deficient in humus, not so much because of sparse vegetation cover as because of the slowness of the chemical processes that convert the vegetable matter to humus.
Industrial effluents enriched with sulphates are generally deficient in electron donors.
Evaporated films of amorphous WO3 are generally deficient in oxygen, which gives rise to the gap states and n-type semiconductivity.
Some micronutrients, such as zinc (Zn), copper (Cu), and molybdenum (Mo), are generally deficient in highly weathered tropical soils (Barker and Pilbeam 2006); while boron (B) is commonly deficient in soils throughout the world (Lehto et al. 2010).
It was shown that natural topsoil cover increased organic carbon content and humus quality of the soil and slightly increased the content of available phosphorus that is generally deficient in the dumpsite soils of the studied region.
Ultramafic soils are generally deficient in essential plant mineral nutrients (phosphorus, potassium), have major cation imbalances (low calcium-to-magnesium molar ratios), and have high concentrations of certain phytotoxic elements, including nickel, cobalt and manganese (Brady et al. 2005; Kazakou et al. 2008; O'Dell and Rajakaruna 2011).
Consequently, bulge stars are generally deficient in heavy elements.
In this study, using purified recombinant LRR domains, we demonstrate that Nod2 is a direct antimicrobial agent and this activity is generally deficient in proteins carrying Crohn's-associated mutations.
However, tumor cells are generally deficient in these critical components.
