We consider a model introduced by Baker et al. [Phys. Rev. E 88, 042113 (2013)] of a single lattice random walker moving on a domain of allowed sites, surrounded by blocked sites. The walker enlarges the allowed domain by eroding the boundary at its random encounters with blocked boundary sites: attempts to step onto blocked sites succeed with a given probability and convert these sites to allo...

Land degradation is a great threat in the Heihe River Basin, located in the aridinland of northwestern China and land desertification is one of the main aspects ofenvironmental changes in this basin. Previous studies have focused on water resourceutilization and soil erosion, but the status of degraded land in the Heihe River Basin, suchas its distribution, extent and precise characteristics is...

The yielding behavior of a sheared Laponite suspension is investigated within a 1 mm gap under two different boundary conditions. No-slip conditions, ensured by using rough walls, lead to shear localization as already reported in various soft glassy materials. When apparent wall slip is allowed using a smooth geometry, the sample breaks up into macroscopic solid pieces that get slowly eroded by...

Sterol delta22-desaturase has been purified from a strain of Candida glabrata with a disruption in the gene encoding sterol 14alpha-demethylase (cytochrome P-45051; CYP51). The purified cytochrome P-450 exhibited sterol delta22-desaturase activity in a reconstituted system with NADPH-cytochrome P-450 reductase in dilaurylphosphatidylcholine, with the enzyme kinetic studies revealing a Km for er...

The microsomal fraction prepared from the mucosa of rabbit bladder was analyzed for the presence of enzymes and activities associated with the cytochrome P-450-dependent monooxygenase system. Reduced nicotinamide adenine dinucleotide phosphate:cytochrome P-450 reductase (315 units/mg protein), reduced nicotinamide adenine dinucleotide:cytochrome b5 reductase (920 units/mg protein), cytochrome P...

Rabbit antibodies raised against the major isozymes of cytochrome P-450 isolated from hepatic microsomes of beta-naphthoflavone- (BNF) and phenobarbital-treated rats (cytochrome P-450 BNF-B2 and cytochrome P-450 PB-B2, respectively) and against rat liver NADPH-cytochrome P-450 reductase were used to localize these enzymes immunohistochemically in the rat ventral prostate. Using the unlabeled an...

Cytochrome P-450 was purified to a specific content of 16 nmol/mg of protein from bovine adrenal cortex microsomes by hydrophobic chromatography using an w-amino-n-octyl Sepharose column in the presence of Emulgen 913, a nonionic detergent. The purified preparation exhibited a single polypeptide band (Mr = 47,000 f 1,000) when submitted to sodium dodecyl sulfate-polyacrylamide gel electrophor...

Depending on the amount of aeolian sediment input and dune erosion, dune size and morphology change over time. Since coastal foredunes play an important role in the Dutch coastal defence, it is important to have good insight in the main factors that control these changes. In this paper the temporal variations in foredune erosion and accretion were studied in relation to proxies for aeolian tran...

Many industries with avoidable fixed costs face competitive price instability problems in an attempt to maintain profitability. We designed an experimental environment where profitability is eroded by the addition of sunk and avoidable fixed costs. While we cannot reject the hypothesis that sunk fixed costs have no effect on prices, we observe a pattern of price signaling and responses which ma...