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Humus is different from decomposing soil organic matter. The latter looks rough and has visible remains of the original plant or animal matter. Fully humified humus, on the contrary, has a uniformly dark, spongy, and jelly-like appearance, and is amorphous; it may gradually decay over several years or persist for millennia. [14]
Age and origin of the source material determine the chemical structure of humic substances. In general, humic substances derived from soil and peat (which takes hundreds to thousands of years to form) have higher molecular weight, higher amounts of O and N, more carbohydrate units, and fewer polyaromatic units than humic substances derived from ...
Modacrylic fibers are modified acrylic fibers made from acrylonitriles, but larger amounts of other polymers are added to make the copolymers. The modacrylic fibers are produced by polymerizing the components, dissolving the copolymer in acetone, pumping the solution into the column of warm air (dry-spun), and stretching while hot. [3]
Humins are not considered to be a dangerous substance according to officially recognized hazardous material classification systems based on physical-chemical properties such as flammability, [8] explosiveness, susceptibility to oxidation, corrosiveness or eco-toxicity. [9]
Dyneema Composite Fabric (DCF), also known as Cuben Fiber (CTF3), is a high-performance non-woven composite material used in high-strength, low-weight applications. It is constructed from a thin sheet of ultra-high-molecular-weight polyethylene ( UHMWPE , "Dyneema") laminated between two sheets of polyester .
Almost all the brands we tested had plastic-free packaging. Finally, manufacturers often donate to green causes. So on the face of it, detergent sheets do come across as more eco-friendly, but the ...
Cationic polymers are among the main functional components of hair gel. The positive charges in the polymers causes them to stretch, making the gel more viscous.Hair gels resist natural protein conformations and allow hair to be styled and textured, because the stretched-out polymer takes up more space than a coiled polymer and thus resists the flow of solvent molecules around it.
Claw clips were common in the 1990s when plastic hair accessories grew in popularity. [4] Hairdos with claw clips tend to be simple and easy to perform, ranging from spiky 90s-style updos, twisted buns held in place by the clip, and a "waterfall" style in which hair flows over of the top of the clip. [5]