( ( ( ( ( ( ( All elements ) ( of ( ( ( ( atomic ( number 4 ) ) ( -LRB- ( beryllium -RRB- ) ) ) and ) higher ) ) ) ( can ( be ( quantitatively measured ) ) ) ) , ) and ) ( ( ( the ( detection limit ) ) ( for ( many elements ) ) ) ( is ( ( ( less ( than 100 ) ) parts ) ( per million ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT All) (NNS elements)) (PP (IN of) (NP (NP (NP (JJ atomic) (NN number) (CD 4)) (PRN (-LRB- -LRB-) (NP (NNP beryllium)) (-RRB- -RRB-))) (CC and) (NP (JJR higher))))) (VP (MD can) (VP (VB be) (VP (ADVP (RB quantitatively)) (VBN measured))))) (, ,) (CC and) (S (NP (NP (DT the) (NN detection) (NN limit)) (PP (IN for) (NP (JJ many) (NNS elements)))) (VP (VBZ is) (NP (NP (QP (JJR less) (IN than) (CD 100)) (NNS parts)) (PP (IN per) (NP (CD million)))))) (. .)))
All elements of atomic number 4 (beryllium) and higher can be quantitatively measured, and the detection limit for many elements is less than 100 parts per million.
(ROOT (S (NP (NP (DT The) (JJ low) (JJ atomic) (NN number)) (PP (IN of) (NP (NN beryllium)))) (VP (VBZ allows) (S (NP (PRP it)) (VP (TO to) (VP (VB absorb) (NP (NNPS x-rays)))))) (. .)))