Nine of the nineteen-amino acids commonly found in proteins are dextrorotatory ( at a wavelength of 589 nm ), and-fructose is also referred to as levulose because it is levorotatory.
22.
The fact that D-glucose is dextrorotatory is a combined effect of its four chiral centers, not just of C-2; and indeed some of the other D-aldohexoses are levorotatory.
23.
Apart from direct measurement of the optical rotation of an actual sample, it is only possible to determine whether a given chiral molecule will be levorotatory or dextrorotatory directly from its absolute configuration, via detailed computer modeling.
24.
The second aircraft was completed as the "'YO-31 "', with a geared Curtiss V-1570-7 Conqueror engine and an enlarged fin, 3 " longer cowling, and a two-blade, dextrorotatory propeller.
25.
"' Camphoric acid "', "'Latin form "'Acidum camphoricum "', is a white crystallisable substance obtained from the oxidation of camphor, it exists in three optically different forms; dextrorotatory one is obtained by the oxidation of dextrorotatory camphor and used in pharmaceuticals.
26.
"' Camphoric acid "', "'Latin form "'Acidum camphoricum "', is a white crystallisable substance obtained from the oxidation of camphor, it exists in three optically different forms; dextrorotatory one is obtained by the oxidation of dextrorotatory camphor and used in pharmaceuticals.
27.
D-( " S " )-Coniine has since been determined to be a colorless alkaline liquid, with a penetrating odour and a burning taste; has D 0?0.8626 and D 19?0.8438, refractive index " n " 23?D 1.4505, and is dextrorotatory, [ ? ] 19?D + 15.7?. ( See comments about the specific rotation below, under " Enantiomers " . ) L-( " R " )-Coniine has [ ? ] 21?D 15?and in other respects resembles its D-isomer, but the salts have slightly different melting points; the platinichloride has mp . 160 �C ( L�ffler and Friedrich report 175 �C ), the aurichloride mp . 59 �C.
