Lung uptake and excretion of n-hexane were studied in ten workers in a shoe factory. Simultaneous samples of inhaled and alveolar air were collected with the aid of a Rhan-Otis valve, personal samplers, and charcoal tubes. Alveolar excretion was monitored during a six hour postexposure period. Uptake was calculated from lung ventilation, the retention coefficient, and environmental concentratio...

A new family of BODIPY dyes (PPB1-4) based on the pyridine-pyrimidine hybrid structure has been synthesized. These dyes show high cyan fluorescence in hexane with quantum yields (Φf) ranging from 0.33 to 0.90. Interestingly, moderate fluorescence of PPB1-4 is observed in the solid state (Φf, 0.11-0.26). X-ray structure analysis demonstrates that H-aggregation should be responsible for the red-s...

In the crystal structure of the title compound, C(18)H(25)NO, mol-ecules are linked via O-H⋯N hydrogen bonds, forming chains parallel to the c axis. Additional weak N-H⋯O inter-actions stabilize the crystal packing. The adamantane cage consists of three fused cyclo-hexane rings in almost ideal chair conformations, with C-C-C angles in the range 107.9 (10)-111.3 (11)°.

In the title mol-ecular salt, C(8)H(12)N(+)·C(6)H(10)O(4)P(-), the cation and anion are connected by N-H⋯O hydrogen bonds. The C atoms of the cyclo-hexane ring are disordered over two sets of sites in a 0.51 (4):0.49 (4) occupancy ratio to generate two superimposed chair conformations. One of the terminal phosphate O atoms is also disordered in a 0.62 (2):0.38 (2) ratio.

The title compound, C(26)H(28)O(4), lies about a crystallographic twofold rotation axis. The cyclo-hexane rings adopt a chair conformation. The two benzene rings form a dihedral angle of 40.82 (3)°. No significant intra- or inter-molecular inter-actions are observed in the crystal structure.

In the title compound, C(19)H(19)ClO(4), the central fused ring and the attached cyclo-hexene ring adopt envelope conformations, while the cyclo-hexane ring adopts a chair conformation. The crystal packing is stabilized by O-H⋯O hydrogen bonds, which link the mol-ecules into a chain along the b axis. Weak C-H⋯O bonds also occur.

The two oxazolidine rings (A and B) of the title compound, C34H44N2O4, display roughly half-chair conformations, which could be described as twisted on the C-O bond. Together, the fused oxazolidine rings have a butterfly shape, with the H atoms attached to the ring junction C atoms in a cis orientation. The cyclo-hexane rings of both p-menthone fragments display chair conformations. The absolut...

Coarse-graining is a systematic way of reducing the number of degrees of freedom representing a system of interest. Several coarse-graining techniques have so far been developed, such as iterative Boltzmann inversion, force-matching, and inverse Monte Carlo. However, there is no unified framework that implements these methods and that allows their direct comparison. We present a versatile objec...

The neurotoxicity of n-pentane, n-hexane, and n-heptane have been studied in Wistar strain male rats after exposure to 3000 ppm of n-pentane, n-hexane, or n-heptane for 12 hours a day for 16 weeks. The nerve conduction velocity and the distal latency were measured before the beginning of the exposure and after exposure for four, eight, 12, and 16 weeks. The experiment showed that n-hexane distu...

In the title compound, C45H40N4O5, the cyclo-hexane entity on the (3-cyano-2,5-dihydro-furan-2-yl-idene)propane-dinitrile group, which replaces the usual dimethyl substituents, has not perturbed the delocalization geometry significantly. Weak inter-molecular inter-actions, viz. C-H⋯N(cyano), C-H⋯O(ether), C-H⋯π and π-π [between the aromatic rings with the shortest centroid-centroid distance of ...