NC State
R. Atalla. Chemical modification of pulp refining rates – prepared discussion contribution. In Papermaking Raw Materials, Trans. of the VIIIth Fund. Res. Symp. Oxford, 1985, (V. Punton, ed.), p 1136, FRC, Manchester, 2018.


During a visit to the Desert Research Station of the University of California at Riverside, we were cautioned about the remarkable penetration capability of some of the cactus spines. This suggested unusually high compressive strength and it occurred to me that perhaps, if I may use the metaphor of the Sufi Mystics, the “Divine Engineer” had something to teach us by contemplation of these spines.

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