4,5-Diferrocenyl-1,2-dithiol-3-one

The Strongly Regular (45, 12, 3, 3) Graphs

Using two backtrack algorithms based on different techniques, designed and implemented independently, we were able to determine up to isomorphism all strongly regular graphs with parameters v = 45, k = 12, λ = μ = 3. It turns out that there are 78 such graphs, having automorphism groups with sizes ranging from 1 to 51840.

Enumeration of symmetric ( 45 , 12 , 3 ) designs with nontrivial automorphisms ∗

We show that there are exactly 4285 symmetric (45,12,3) designs that admit nontrivial automorphisms. Among them there are 1161 self-dual designs and 1562 pairs of mutually dual designs. We describe the full automorphism groups of these designs and analyze their ternary codes. R. Mathon and E. Spence have constructed 1136 symmetric (45,12,3) designs with trivial automorphism group, which means t...

ConnCensus Vol. 45 No. 12

4-(Pyridin-2-yl)-1,3-dithiol-2-one

In the title compound, C(8)H(5)NOS(2), the non-H atoms are approximately coplanar [maxium deviation = 0.060 (3) Å]. The dihedral angle between the least-squares planes of the pyridine and 1,3-dithiol-2-one rings is 5.96 (17)°. The crystal packing is stabilized by weak inter-molecular C-H⋯O hydrogen bonds and by an S⋯S close contact [3.510 (5) Å].

AFLUID Mar. 45/3

Just, Armin, Heimo Ehmke, Uwe Wittmann, and Hartmut R. Kirchheim. Tonic and phasic influences of nitric oxide on renal blood flow autoregulation in conscious dogs. Am. J. Physiol. 276 (Renal Physiol. 45): F442–F449, 1999.—The aim of this study was to investigate the influence of the mean level and phasic modulation of NO on the dynamic autoregulation of renal blood flow (RBF). Transfer function...