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R B Dodd - One of the best experts on this subject based on the ideXlab platform.
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plant factors influencing enzyme Retting of fiber and seed flax
Journal of Agricultural and Food Chemistry, 2001Co-Authors: Danny E Akin, L L Rigsby, R B DoddAbstract:Retting, which is the microbial activity through which bast fibers are released from nonfiber tissues, is the limiting factor in flax processing. The objective of this work is to identify chemical and structural characteristics in a variety of fiber and seed flax types that influence enzyme Retting in a recently developed method. Analyses of flax retted in a series of tests, including two enzyme Rettings in some cases, indicated that lignin did not limit the separation of fibers from shive and showed that pectinases in enzyme-Retting mixtures could ret fiber and seed flax. However, mature stems, such as that in flax produced for seed, had greater amounts of cutin and wax in the cleaned fiber product, suggesting that the cuticle could be a greater antiquality factor in seed versus fiber flax. With seed flax, the fraction of finer fibers produced during Retting was significantly lower than with fiber flax. Results indicated that enzyme Retting could be used to obtain flax fibers from seed flax stem residues and add value to this agricultural material.
Danny E Akin - One of the best experts on this subject based on the ideXlab platform.
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plant factors influencing enzyme Retting of fiber and seed flax
Journal of Agricultural and Food Chemistry, 2001Co-Authors: Danny E Akin, L L Rigsby, R B DoddAbstract:Retting, which is the microbial activity through which bast fibers are released from nonfiber tissues, is the limiting factor in flax processing. The objective of this work is to identify chemical and structural characteristics in a variety of fiber and seed flax types that influence enzyme Retting in a recently developed method. Analyses of flax retted in a series of tests, including two enzyme Rettings in some cases, indicated that lignin did not limit the separation of fibers from shive and showed that pectinases in enzyme-Retting mixtures could ret fiber and seed flax. However, mature stems, such as that in flax produced for seed, had greater amounts of cutin and wax in the cleaned fiber product, suggesting that the cuticle could be a greater antiquality factor in seed versus fiber flax. With seed flax, the fraction of finer fibers produced during Retting was significantly lower than with fiber flax. Results indicated that enzyme Retting could be used to obtain flax fibers from seed flax stem residues and add value to this agricultural material.
Asok Ghosh - One of the best experts on this subject based on the ideXlab platform.
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ribbon Retting of jute a prospective and eco friendly method for improvement of fibre quality
Industrial Crops and Products, 2003Co-Authors: S Banik, M K Basak, D Paul, P Nayak, D Sardar, B C Sanpui, Asok GhoshAbstract:Abstract Jute—an important cash crop of eastern India is traditionally grown for extraction of fibre by a natural microbial process known as Retting. Usually mature stems of harvested jute plants are allowed to ret in pond or ditch water. Retting is a preferential rotting process to separate the fibre from woody stem without damaging the fibre cellulose. Retting microbes consume the non-fibrous cementing materials mainly pectin and hemicellulose. Over Retting causes degradation of fibre cellulose while under Retting causes incomplete removal of gummy materials viz., pectic substances. Both over Retting and under Retting which are very difficult to control causes production of low grade jute fibre. In conventional Retting, a huge biomass undergoes decomposition in stagnant water, so Retting causes environmental pollution. In ribbon Retting, ribbons are stripped out mechanically from the stem of mature jute plants, coiled and allowed to ret under water. Ribbon Retting reduces time of normal Retting by 4–5 days. Moreover, requirement of water for ribbon Retting is almost half in comparison to conventional whole plant Retting under normal condition. This also reduces environmental pollution to a great extent. But use of efficient pectinolytic microbial inoculum improves quality of fibre, further reduce the time of Retting and the environmental pollution. In our study, a mixed bacterial Retting culture, developed in our institute, was inoculated during ribbon Retting of jute. The ribbon retted jute fibres are absolutely free from bark and were of higher grade. Moreover, the fibre filaments were stronger, improved coloured and finer textured compared to conventional stem retted jute fibres. Most of the defects arising from conventional Retting could be overcome by ribbon Retting. So, ribbon Retting is a great promise to produce high quality jute fibre in one hand and a more eco-friendly measure on the other.
Jianglin Fang - One of the best experts on this subject based on the ideXlab platform.
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Effects of plasma treatment time on modification of acrylic denture material
Journal of Nanjing Medical University, 2007Co-Authors: Huaiqin Zhang, Jianglin FangAbstract:Abstract Objective To study the relationship between plasma treatment time and efficacy. Methods Test specimens were prepared from an acrylic resin denture material in the size of 2 mm × 10 mm × 10 mm. Plasma treatment was carried out on the surface of Polymethyl methacrylate(PMMA) at different time. XPS studies, IR spectra studies and measurement of wetting angle were performed. Results XPS showed the peak corresponding to C-O getting higher as the treatment proceeded, however at 120 seconds, the peak did not increase any longer and partly crossed with the peak at the duration of 60 seconds. IR spectra showed the wave corresponding to C-H was reduced as O2-plasma treatment proceeded, and then changed little. Wetting angle initially decreased dramatically, however, as the reaction proceeded, wetting angle increased slightly. Conclusion Equilibrium was reached for introducing oxygen-containing groups and changing of C-H. As the treatment proceeded, wetting angle increased slightly.
L L Rigsby - One of the best experts on this subject based on the ideXlab platform.
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plant factors influencing enzyme Retting of fiber and seed flax
Journal of Agricultural and Food Chemistry, 2001Co-Authors: Danny E Akin, L L Rigsby, R B DoddAbstract:Retting, which is the microbial activity through which bast fibers are released from nonfiber tissues, is the limiting factor in flax processing. The objective of this work is to identify chemical and structural characteristics in a variety of fiber and seed flax types that influence enzyme Retting in a recently developed method. Analyses of flax retted in a series of tests, including two enzyme Rettings in some cases, indicated that lignin did not limit the separation of fibers from shive and showed that pectinases in enzyme-Retting mixtures could ret fiber and seed flax. However, mature stems, such as that in flax produced for seed, had greater amounts of cutin and wax in the cleaned fiber product, suggesting that the cuticle could be a greater antiquality factor in seed versus fiber flax. With seed flax, the fraction of finer fibers produced during Retting was significantly lower than with fiber flax. Results indicated that enzyme Retting could be used to obtain flax fibers from seed flax stem residues and add value to this agricultural material.
