In Caulobacter crescentus, asymmetry is generated in the predivisional cell, resulting in the formation of two distinct cell types upon cell division: a motile swarmer cell and a sessile stalked cell. These progeny cell types differ in their relative programs of gene expression and DNA replication. In progeny swarmer cells, DNA replication is silenced for a defined period, but stalked cells rei...

The F-actin distribution was studied during pole cell formation in Drosophila embryos using the phalloidin derivative rhodaminyl-lysine-phallotoxin. Nuclei were also stained with 4'-6 diamidine-2-phenylindole dihydrochloride to correlate the pattern seen with the nuclear cycle. The precursors of the pole cells, the polar surface caps, were found to have an F-actin-rich cortex distinct from that...

In this paper, it is clearly shown that the two well-known necessary and sufficient conditions mp ≥ n as generic static output feedback pole-assignment and mp + d(m+p) ≥ n+d as generic minimum d-th order dynamic output feedback pole-assignment on complex field , unbelievably, do not match up each other in strictly proper linear systems. For the analysis, a diagram analysis is newly created (whi...

[1] We present adaptive optics data from the Keck telescope, taken while the Huygens probe descended through Titan’s atmosphere and on the days following touchdown. No probe entry signal was detected. Our observations span a solar phase angle range from 0.05 up to 0.8 , with the Sun in the west. Contrary to expectations, the east side of Titan’s stratosphere was usually brightest. Compiling ima...

Dual-frequency ranging measurements were recorded for a three-week interval during the 1995 solar conjunction of the Ulysses spacecraft. The unusual occultation geometry resulting from the high inclinationUlysses orbit enabled coronal radio sounding from the solar South Pole to the heliographic equator at solar ray path offsets near 0.1 AU. The electron column density along the line-of-sight be...

Aims: Renal vascular clamping during partial nephrectomy can lead to renal ischemia and kidney damage due to reperfusion injuries, but a surgical technique without any ischemia can eliminate such unwanted effects on kidney function. The present study aimed to demonstrate the feasibility of partial nephrectomy in conditions where the renal artery is ready to be clamped. Patient Information: In ...

Caulobacter crescentus initiates a single round of DNA replication during each cell cycle. Following the initiation of DNA replication, the essential CckA histidine kinase is activated by phosphorylation, which (via the ChpT phosphotransferase) enables the phosphorylation and activation of the CtrA global regulator. CtrA approximately P then blocks the reinitiation of replication while regulati...

In this article, we extend our previous work (M.-C. Lai and W.-C. Wang, Numer Methods Partial Differential Eq 18:56–68, 2002) for developing some fast Poisson solvers on 2D polar and spherical geometries to an elliptical domain. Instead of solving the equation in an irregular Cartesian geometry, we formulate the equation in elliptical coordinates. The solver relies on representing the solution ...

tern of MinC and MinD is dramatically changed when The ability to place the division site at a specified posiminE is also expressed. MinC and MinD move to one tion within the cell is a fundamental property of most end of the cell to form a membrane-associated polar living organisms. One important factor in division site zone that extends from the end of the cell to a position placement in both ...