Fluoride oxidative stress induced

Agalakova NI, Gusev GP (2012) Fluoride induces oxidative stress and ATP depletion in the rat erythrocytes in vitro. Environ Toxicol Pharmacol 34(2) 334-337. doi 10.1016/j. etap. 2012.05.006... 

Nabavi, S. M., Nabavi, S. F., Eslami, S., Moghaddam, A.H. (2012). In vivo protective effects of quercetin against sodium fluoride-induced oxidative stress in the hepatic tissue. Food Chem., 132(2), 931-935. 

Some polymorphic modifications can be converted into one another by a change in temperature. Phase transitions can also be induced by an external stress field. Phase transitions under tensile stress can be observed in natural rubber when it orients and crystallizes under tension and reverts to its original amorphous state by relaxation [41]. Stress-induced transitions are also observed in some crystalline polymers, such as PBT [42,43] and its block copolymers with poly(tetramethylene oxide) (PTMO) [44], poly(ethylene oxide) (PEO) [45,46], polyoxycyclobutane [47], nylon 6 [48], poly(vinylidene fluoride) [49,50], polypivalolactone [51], keratin [52,53], and others. These stress-induced phase transitions are either reversible, i.e., the crystal structure reverts to the original structure on relaxation, or irreversible, i.e., the newly formed structure does not revert after relaxation. Examples of substances with the former include PBT, PEO, and keratin. 

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