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In recent years, advancements in composite materials technology have further enhanced the properties of FRP vessels. Innovations such as nanocomposites and hybrid materials have significantly improved their mechanical and thermal performance. These enhancements make FRP vessels even more suitable for demanding applications, including high-pressure environments found in oil and gas extraction and storage.
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Concerning modified celluloses, methyl cellulose was negative in the bacterial reverse mutation assay, in the in vitro chromosomal aberration test in mammalian cells and in host-mediated assays with yeast and bacteria. In vivo methyl cellulose was also negative in a chromosome aberration assay in rat bone marrow and in the dominant lethal assay in male rats. Carboxymethyl cellulose was negative in the bacterial reverse mutation assay, in the in vitro chromosomal aberration test in mammalian cells, performed only without metabolic activation, and in host-mediated assays.
Where the HPMC capsule has been coated with a colour, the coating may well be synthetic. Titanium dioxide is commonly used to colour capsules, and this synthetic colourant has some associated health risks and warnings. It is possible to naturally colour capsules, but only in certain colours. Shades of green can be achieved with a coating of chlorophyll, and a purple capsule shell is available using a purple carrot extract.
MK30M FP、MT4031、MT5503
3.2.2.4 Reproductive and developmental studies
5. hydroxypropyl methyl cellulose (HPMC) in putty powder amount?


