Sentence examples for rotation value of from inspiring English sources

If the linkage between the monosaccharides composing sucrose is broken, the optical rotation value of sucrose changes from positive to negative; the new value reflects the composite rotation values for D-glucose, which is dextrorotatory (+52°), and D-fructose, which is levorotatory (−92°).

The absolute stereochemistry of C-10 was deduced to be S by a comparison of the optical rotation value of 9 (D −8.7, MeOH) with that of (S -3-methyl-1-phenyl-3-pentanol (D −1.6, CHCl3) [16].

The relative stereochemistry at H4-H8 of compound 1 ( = −68.3) was determined to the same as trichodermaketone C by comparing the NMR data and optical rotation value of trichodermaketone C ( = −92.5) [9].

The absolute configurations of compound 2 in H-2 and H-8 were determined the same as these of trichoketide B by comparing the CD spectrum (Fig. 3), the NMR data and the optical rotation value of trichoketide B [15].

Despite the presence of a stereogenic center at C-4, the measured optical rotation value of fusagerin B (2) was zero, and no Cotton effect was observed in its CD spectrum, suggesting that 2 is a racemate.

The absolute stereochemistry of the chiral center of C-9 was determined to be S by comparing the optical rotation value of 3 (D −8.8, MeOH) with (S -3-methyl-1-phenylbutan-2-ol (D −29.5, CHCl3) [15].

The dependence of the specific rotation value on the molecular weight of the isotactic polystyrenes has been demonstrated.

have physical rotation values of over 1000 and less than 100 years, respectively (Harrington 1990; Olson et al. 1990).

There was good correlation between actual rotation and calculated rotation values of all observers, and the intraclass correlation coefficient was 0.997.

However, the specific rotation values of 1 3 were obviously different, which indicated that substituents at C-8 and 5 contributed to specific rotation significantly.

We carefully examined the specific rotation values of some 2′,3′,4′-trisubstituted isoflavans (Table 3), and the results suggested that the methoxy group substituted at C-2′ had a huge impact on the specific rotation, probably on account of the spatial proximity.