Results 21 to 30 of about 57,174 (264)

A characterization of Fuzzy neighborhood commutative division rings

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1993
We give a characterization of fuzzy neighborhood commutative division ring; and present an alternative formulation of boundedness introduced in fuzzy neighborhood rings. The notion of β-restricted fuzzy set is considered.
T. M. G. Ahsanullah, Fawzi Al-Thukair
doaj   +1 more source

Small fluctuations in cell wall thickness in pine and spruce xylem: Signal from cambium?

open access: yesPLoS ONE, 2020
In the conifer tree rings, each tracheid goes through three phases of differentiation before becoming an element of the stem water-conducting structure: division, extension, and cell wall thickening. These phases are long-lasting and separated temporally,
Eugene A Vaganov   +3 more
doaj   +1 more source

Proteolysis-Dependent Remodeling of the Tubulin Homolog FtsZ at the Division Septum in Escherichia coli. [PDF]

open access: yesPLoS ONE, 2017
During bacterial cell division a dynamic protein structure called the Z-ring assembles at the septum. The major protein in the Z-ring in Escherichia coli is FtsZ, a tubulin homolog that polymerizes with GTP.
Marissa G Viola   +3 more
doaj   +1 more source

SepG coordinates sporulation-specific cell division and nucleoid organization in Streptomyces coelicolor [PDF]

open access: yesOpen Biology, 2016
Bacterial cell division is a highly complex process that requires tight coordination between septum formation and chromosome replication and segregation.
Le Zhang   +3 more
doaj   +1 more source

Tripotents: a class of strongly clean elements in rings

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2018
Periodic elements in a ring generate special classes of strongly clean elements. In particular, elements b such that b = b3+, which are called tripotents and include idempotents, negative of idempotents and order 2 units, are strongly clean.
Călugăreanu Grigore
doaj   +1 more source

Three-Dimensional Superresolution Imaging of the FtsZ Ring during Cell Division of the Cyanobacterium Prochlorococcus

open access: yesmBio, 2017
Superresolution imaging has revealed subcellular structures and protein interactions in many organisms. However, superresolution microscopy with lateral resolution better than 100 nm has not been achieved in photosynthetic cells due to the interference ...
Riyue Liu   +7 more
doaj   +1 more source

Subgroups of finite index in an additive group of a ring

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
If K is an infinite field and G⫅K is a subgroup of finite index in an additive group, then K∗=G∗G∗−1 where G∗ denotes the set of all invertible elements in G and G∗−1 denotes all inverses of elements of G∗.
Doostali Mojdeh, S. Hassan Hashemi
doaj   +1 more source

A conserved cell division protein directly regulates FtsZ dynamics in filamentous and unicellular actinobacteria

open access: yeseLife, 2021
Bacterial cell division is driven by the polymerization of the GTPase FtsZ into a contractile structure, the so-called Z-ring. This essential process involves proteins that modulate FtsZ dynamics and hence the overall Z-ring architecture.
Félix Ramos-León   +7 more
doaj   +1 more source

Genetic evidence for inhibition of bacterial division protein FtsZ by berberine. [PDF]

open access: yesPLoS ONE, 2010
BACKGROUND: Berberine is a plant alkaloid that is widely used as an anti-infective in traditional medicine. Escherichia coli exposed to berberine form filaments, suggesting an antibacterial mechanism that involves inhibition of cell division.
Jaroslaw M Boberek, Jem Stach, Liam Good
doaj   +1 more source

The hypermorph FtsA* protein has an in vivo role in relieving the Escherichia coli proto-ring block caused by excess ZapC.

open access: yesPLoS ONE, 2017
Assembly of the proto-ring, formed by the essential FtsZ, FtsA and ZipA proteins, and its progression into a divisome, are essential events for Escherichia coli division.
Cristina Ortiz   +3 more
doaj   +1 more source

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