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    ___    \ \\/ // | || | ||  /_   _// | \  / || 
   /   ||   \ ` //  | '--' ||   -| ||-  |  \/  || 
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    -|_||    `-`'   `-`  `-`   `-----`  `-`  `-`  
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Text this: Interparticle forces in spherical monodispersed silica dispersions: Effects of branched polyethylenimine and molecular weight