http://en.wikipedia.org/wiki/Ficoll
https://www.allinno.com/produc....t/polysaccharides/64
Stimuli-responsive hydrogels have garnered meaning care as a versatile class of soft actuators . inclosing anisotropic holdings , and shape-change programmability to responsive hydrogels forebodes a host of opportunities in the development of soft robots . Herein we describe the synthesis of pH-responsive hydrogel nanocomposites with predetermined microstructural anisotropy , shape-transformation , and self-healing . Our hydrogel nanocomposites are largely composed of zwitterionic monomer
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