نتایج جستجو برای: spinning machine
تعداد نتایج: 273442 فیلتر نتایج به سال:
Spiders achieve superior silk fibres by controlling the molecular assembly of silk proteins and the hierarchical structure of fibres. However, current wet-spinning process for recombinant spidroins oversimplifies the natural spinning process. Here, water-soluble recombinant spider dragline silk protein (with a low molecular weight of 47 kDa) was adopted to prepare aqueous spinning dope. Artific...
This article examines the influence of parameters coating teeth discrete drum on quality OE yarn. Based analysis conditions for retention fibers by covering drum, equations were obtained to determine angle inclination teeth. To effect yarn quality, experiments performed using Full Factor Experiments mathematical planning method, and a regression equation was each variable. As result, optimal va...
asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...
morphological changes in polyvinyl butyral (pvb) electrospun nanofibres can be acquired by preparation of pvb spinning solution in different solvents. accordingly, three solvents, including ethyl alcohol, n-butanol and isopropanol, with diverse physical properties (e.g. boiling point, density, dipole moment and dielectric constant) were used to prepare polyvinyl butyral (pvb) spinning solution...
This article analyses the improvement of cotton-spinning technologies in years after great inventions Hargreaves, Arkwright, and Crompton. While these ‘macro-inventions’ have attracted considerable historical attention, our understanding major changes types sizes spinning machines used UK between 1780s onset state-collected factory statistics 1830s is still largely based on experience high-prof...
I wish to report here a striking phenomenon that arises in the developing brain of the zebrafish embryo. High-resolution differential interference contrast (DIC) time-lapse video microscopy in the live embryo reveals that throughout the second day of embryogenesis, the nuclei of some of the still-undifferentiated brain cells undergo a sustained spinning behaviour, usually around a constant axis...
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