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Sharkskin is a twill weave fabric created using acetate, rayon, worsted wool, lycra, and other plastic fibers. The arrangement of darker and brighter threads in a twill weave creates a subtle pattern of lines that run across the fabric diagonally and a two tone, lustrous appearance.
The white handle of this tantō (left) is covered with shagreen in its natural form. Two small decorative elephants made of silver and shagreen. Shagreen has an unusually rough and granular surface, and is sometimes used as a fancy leather for book bindings, pocketbooks and small cases, as well as its more utilitarian uses in the hilts and scabbards of swords and daggers, where slipperiness is ...
An unquestionable advantage of adsorption-based oxygen plants is the low cost of oxygen produced in the cases where there are no rigid requirements to the product oxygen purity. Structurally, the adsorption oxygen plant consists of several adsorbers, the compressor unit, pre-purifier unit, valve system and the plant control system .
This ability to avoid photorespiration makes these plants more hardy than other plants in dry and hot environments, wherein stomata are closed and internal carbon dioxide levels are low. Under these conditions, photorespiration does occur in C 4 plants, but at a much lower level compared with C 3 plants in the same conditions.
Dark oxygen production refers to the generation of molecular oxygen (O 2) through processes that do not involve light-dependent oxygenic photosynthesis.The name therefore uses a different sense of 'dark' than that used in the phrase "biological dark matter" (for example) which indicates obscurity to scientific assessment rather than the photometric meaning.
Photosynthetic organisms such as plants, plankton and algae use sunlight to produce oxygen that cycles into the ocean depths, but previous studies conducted in the deep sea have shown that oxygen ...
Photoprotection is the biochemical process that helps organisms cope with molecular damage caused by sunlight.Plants and other oxygenic phototrophs have developed a suite of photoprotective mechanisms to prevent photoinhibition and oxidative stress caused by excess or fluctuating light conditions.
They fix CO 2 and produce oxygen. They protect the sandy coastline against erosion. They are a reserve of biodiversity due to the large number of animal and plant species that find within the habitat a place for feeding, protection and nursery for juveniles. They produce a large part of the sediment that forms part of the sand on our beaches.