( ( ( ( ( Pressure ( is ( ( reduced back ) ( to ( atmospheric pressure ) ) ) ) ) , ) and ) ( ( ( ( temperature ( is ( ( decreased back ) ( to ( room temperature ) ) ) ) ) , ) and ) ( this ( ( causes ( air permeation ) ) ( into ( the beads ) ) ) ) ) ) . )
(ROOT (S (S (NP (NN Pressure)) (VP (VBZ is) (VP (VBN reduced) (PRT (RP back)) (PP (TO to) (NP (JJ atmospheric) (NN pressure)))))) (, ,) (CC and) (S (S (NP (NN temperature)) (VP (VBZ is) (VP (VBN decreased) (PRT (RP back)) (PP (TO to) (NP (NN room) (NN temperature)))))) (, ,) (CC and) (S (NP (DT this)) (VP (VBZ causes) (NP (NN air) (NN permeation)) (PP (IN into) (NP (DT the) (NNS beads)))))) (. .)))
Pressure is reduced back to atmospheric pressure, and temperature is decreased back to room temperature, and this causes air permeation into the beads.
(ROOT (S (S (VP (VBG Reducing) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN in) (NP (DT a) (JJ rigid) (NN container)))))))) (VP (VBZ causes) (NP (NN pressure)) (S (VP (TO to) (VP (VB decrease))))) (. .)))