Abstract
Analyzes of samples of stem and fiber Boehmeria nivea var. Murakami were performed to increase information on the plant and disseminate its multiple possibilities of use. The histochemical analyzes with dyes and reagents showed the presence of lignified, suberous and cutinized cell walls with Safranin in the xylem region. The presence of pectin-cellulose with Astra Blue was confirmed in the regions of fiber bundles (cortex). In all regions of the stem were identified substances such as fat and mucilage with Methylene Blue evidencing high concentrations in the regions of fiber bundles and bark (violet blue). By means of Lugol (dark brown) starches were identified in several parts of the stem with concentrations in the xylem and epidermal regions. Through analyzes by EDS it was possible to identify F, Mg, Al, Si, K and Ca with predominance of K. In the chemical analyzes of the fibers were found 71.75 of cellulose, 12.11 of hemicelluloses, 1.06 of lignin and 1.70% of ashes. The percentages of extractives soluble in hot and cold water were 5.28 and 3.12% respectively, for Ethanol-Toluene was 8.55 and NaOH (1%) 27.27%. Histochemical analyzes revealed important characteristics of the fiber and stem contributing with better knowledge of the species.
Highlights
Nature provides large amounts of fibrous plant materials that are considered renewable, sustainable and biodegradable and can be cultivated on a large scale to obtain fibers to be used in several economic activities
Ramie (Boehmeria nivea) is a fibrous plant monoecious used in diverse areas such as the animal feed, yarns, special paper, pharmaceutical and textile sectors, among others products (Sen & Reddy, 2011)
It has high levels of α and β-cellulose I and high concentrations of pure cellulose, according to Hazra and Karmakar (2008), there is some evidence that may explain its superior mechanical strength among the fibers extracted from stems
Summary
Nature provides large amounts of fibrous plant materials that are considered renewable, sustainable and biodegradable and can be cultivated on a large scale to obtain fibers to be used in several economic activities. Ramie (Boehmeria nivea) is a fibrous plant monoecious used in diverse areas such as the animal feed, yarns, special paper, pharmaceutical and textile sectors, among others products (Sen & Reddy, 2011). It has high levels of α and β-cellulose I and high concentrations of pure cellulose, according to Hazra and Karmakar (2008), there is some evidence that may explain its superior mechanical strength among the fibers extracted from stems. Its fiber is durable and resistant to attacks of bacteria and insects (Jose, Rajna, & Ghosh, 2017)
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