Zoltai, S.C. 1995. Regional variations in peatland ecosystems of west-central Canada through time. Gunneria 70: 35-42. Peatland ecosystems respond to major changes in their environment induced by prolonged changes in climate. In the western boreal region of Canada, permafrost occurs only in Sphagnum-dominated peatlands. In the north, the palsas and peat plateaus are associated with well-defined...

Hepatoprotective potential of peroxisome proliferator activator receptor (PPAR)- α and - γ agonists, fenofibrate (FEN), and pioglitazone (PIO), respectively, against cyclophosphamide (CP)-induced toxicity has been investigated in rat. FEN and PIO (150 and 10 mg/kg/day, resp.) were given orally for 4 weeks. In separate groups, CP (150 mg/kg, i.p.) was injected as a single dose 5 days before the ...

In this issue, Orans et al. (2011) and Tsutakawa et al. (2011) report exciting insights into the molecular principles governing diverse endo- and exonucleolytic cleavage specificities of members of the RAD2/FEN superfamily of nucleases, which have critical roles in DNA replication and maintenance.

We measured the carbon isotopic composition of pore water carbon dioxide from Sallie's Fen, a New Hampshire poor fen. The isotope profiles are used in combination with a one-dimensional diffusion-reaction model to calculate rates of methane production, oxidation and transport over an annual cycle. We show how the rates vary with depth over a seasonal cycle, with methane produced deeper during t...

The title Fe(III) complex, [Fe(C(22)H(32)N(4)O(2))]I, contains a six-coordinate FeN(4)O(2) cation in which the ligand is a reduced Schiff base resulting from the NaBH(4) reduction of the condensation product between salicylaldehyde and 1,5,8,12-tetra-azadodecane. In spite of the increased flexibility of the saturated backbone of the ligand compared to the Schiff base from which it was synthesiz...

Fluxes and C isotopic composition of dissolved carbon and pathways of methanogenesis in a fen soil exposed to experimental drought K.-H. Knorr, B. Glaser, and C. Blodau Limnological Research Station and Department of Hydrology, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany Department of Soil Physics, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany...

Planar strip inductors consisting of two Fe-N films enclosing a conducting film made of Cu, were fabricated on oxidized Si substrates. The inductors were 1 mm long, 2 to 100 µm wide, with layers of thickness ∼ 0.1 µm for the magnetic films and ∼ 0.5 µm for the conductor. The soft (H c = 4 − 8 Oe) magnetic layers were biased during impedance measurement by applying an external field along the st...

The combination of laser-heated diamond anvil cells and synchrotron Mössbauer source spectroscopy were used to investigate high-temperature high-pressure chemical reactions of iron and iron nitride Fe2 N with nitrogen. At pressures between 10 and 45 GPa, significant magnetic hyperfine splitting indicated compound formation after annealing at 1300 K. Subsequent in situ X-ray diffraction reveals ...