Aniline Dyes. A class of synthetic, organic dyes originally obtained from aniline (coal tars),and were the first synthetic dyes. Today the term is used with reference to any synthetic organic dyes and pigments, in contrast to animal or vegetable coloring materials, and synthetic inorganic pigments.
From Wikipedia, the free encyclopedia. Soil organic matter (SOM) is the organic matter component of soil, consisting of plant and animal residues at various stages of decomposition, cells and tissues of soil organisms, and substances synthesized by soil organisms.he concentration of SOM in soils generally ranges from 1% to 6% of the total topsoil mass for most upland soils. Soils whose upper horizons consist of less than 1% organic matter are mostly limited to desert areas, while the SOM content of soils in low-lying, wet areas can be as high as 90%.
The layers of unconsolidated material found at the earth's surface. Soil normally consists inorganic material, air, water, and organic material (decomposed plants and animals).