The title annulenediones 4-9 have been synthesized by first an aldol condensation of cyclohepta-1,3,5-triene-l,6-dicarbaidehyde 10 or its vinylogous dialdehydes 11-14 with acetone to afford the dimethyl diketones 16-20 and then by a second aldol condensation of 1,6-diacetyIcyclohepta-1,3,5-triene 15 or the dimethyl diketones 16-20 with (Z)-3-methylpent-2-en-4-ynal 21, followed 98

A potential 18π-electron system, 11,16-dimethyl-12,14-bisdehydro-1,6-methano[20]annulene-7,20-dione was synthesized and its 1H NMR spectral behavior in CDCl3, CF3CO2D, and D2SO4 was studied. The energy barrier to the methylene flipping was highly dependent on the medium.

Mycobacterium marinum is a ubiquitous organism inhabiting both fresh and salt water. It can cause human diseases such as skin and soft tissue infection. The organism is also known to cause a false positive reaction to interferon-γ release assay, the test to diagnose latent tuberculosis infection. Here, we present a case of submandibular nodule caused by M. marinum with positive T-SPOT.TB test, which was likely to be false positive.

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Effect of wood chips mixing soil on nitrogen removal from agriculture leacheate was examined using soil columns. Cellulose in wood chips was utilized for electron donnor for denitirification and sulfate reduction in the soil columns. Preincubation of wood chips with activated suldge was effective for increase in nitrogen removal. Microbial community of sulfate-reducing microorganisms in the soil column were examined by a nested PCR-DGGE targeting dissimilatory (bi)sulfite reductase genes. Many sulfate-reducing microorganisms are present in wood chips and rotting woods of the soil columns and incubation under denitrification condition or sulfate reducing condition resulted in a difference of microbial community. Sulfate-reducing microorganisms attached around wood may related to degradation of wood.