2-(Mesitylmethylsulfanyl)pyridine N-oxide monohydrate.

In the title compound, C(15)H(17)NOS·H(2)O, the benzene and pyridine rings form a dihedral angle of 71.18 (2)°. The intra-molecular S⋯O distance [2.737 (3) Å] is shorter than expected and, in terms of hybridization principles, the N-C-S angle [114.1 (2)°] is smaller than expected. The crystal structure is stabilized by inter-molecular O-H⋯O and weak C-H⋯O hydrogen bonds. In addition, weak π-π stacking inter-actions with a centroid-centroid distance of 3.778 (3) Šare also observed.

2-(Benzyl-sulfan-yl)pyridine N-oxide.

In the title compound, C(12)H(11)NOS, the dihedral angle between the oxopyridinium and phenyl rings is 58.40 (1)°. The crystal structure is stabilized by C-H⋯O hydrogen bonds, π-π stacking inter-actions involving the pyridinium rings [centroid-centroid distance = 3.6891 (9) Å] and C-H⋯π inter-actions.

Plasma progesterone, estradiol-17 beta and testosterone in maternal and cord blood, and maternal human chorionic gonadotropin at parturition.

To understand the endocrine control of normal parturition in man and interactions of foetal and maternal hormones involved, it is desirable to estimate the hormone levels in the maternal and foetal blood around parturition time. Blood was obtained from the umbilical vessels of 22 male and 30 female neonates and the antecubital veins of their mothers during labour at term. The maternal and neonatal plasma levels of progesterone (P), testosterone (T) and estradiol-17 beta (E2) and maternal plasma levels of human chorionic gonadotrophin (hCG) were determined by radioimmunoassay (RIA). The effect of the foetal sex on the maternal hormones at term was also evaluated. Mean values, with the standard errors of means, of plasma, P, T and E2 in cord blood were 5.3 +/- 0.3, 8.4 +/- 1.2 and 5.0 +/- 0.3 ng/ml, respectively; in the maternal plasma the values were 18.2 +/- 1.2, 1.2 +/- 0.1 and 4.3 +/- 0.4 ng/ml, respectively. The mean T level was significantly higher in cord than in maternal blood, while P was significantly higher in the maternal than in cord blood. The plasma concentrations of P, T and E2 in the mothers delivering male babies were 16.9 +/- 2.2, 1.2 +/- 0.4 and 4.5 +/- 0.7 ng/ml, respectively; in those delivering female babies, the levels were 16.1 +/- 2.4, 1.1 +/- 0.1 and 4.3 +/- 0.4 ng/ml, respectively. Mean plasma levels of hCG in the women was 0.9 +/- 0.1 microgram/ml with no significant difference between the values in the mothers of male and female babies.(ABSTRACT TRUNCATED AT 250 WORDS)