Results 51 to 60 of about 33,732 (253)

Porphene and porphite as porphyrin analogs of graphene and graphite

Nature Communications, 2023
Two-dimensional materials have unusual properties and promise applications in nanoelectronics, spintronics, photonics, (electro)catalysis, separations, and elsewhere. Most are inorganic and their properties are difficult to tune.
Thomas F. Magnera, Paul I. Dron, Jared P. Bozzone, Milena Jovanovic, Igor Rončević, Edward Tortorici, Wei Bu, Elisa M. Miller, Charles T. Rogers, Josef Michl   +9 more
doaj   +1 more source

RINGS OVER WHICH POLYNOMIAL RINGS ARE ARMENDARIZ AND REVERSIBLE

Korean Journal of Mathematics, 2012
Summary: A ring \(R\) is called \textit{reversibly Armendariz} if \(b_j a_i = 0\) for all \(i,j\) whenever \(f(x)g(x) = 0\) for two polynomials \(f(x) = \sum_{i=0}^m {a_i x_i}\), \(g(x) = \sum_{j=0}^n {b_j x_j}\) over \(R\). It is proved that a ring \(R\) is reversibly Armendariz if and only if its polynomial ring is reversibly Armendariz if and only ...
Ahn, Jung Ho, Choi, Min Jeong, Choi, Si Ra, Jeong, Won Seok, Kim, Jung Soo, Lee, Jeong Yeol, Lee, Soon Ji, Lee, Young Sun, Noh, Dong Hyun, Noh, Yu Seung, Park, Gyeong Hyeon, Lee, Chang Ik, Lee, Yang   +12 more
openaire   +3 more sources

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

RING ENDOMORPHISMS WITH THE REVERSIBLE CONDITION [PDF]

Communications of the Korean Mathematical Society, 2010
P. M. Cohn called a ring R reversible if whenever ab = 0, then ba = 0 for a,b 2 R. Commutative rings and reduced rings are reversible. In this paper, we extend the reversible condition of a ring as follows: Let R be a ring and fi an endomorphism of R, we say that R is right (resp., left) fi-shifting if whenever afi(b) = 0 (resp., fi(a)b = 0) for a,b 2 ...
Baser, Muhittin, Kaynarca, Fatma, Kwak, Tai Keun   +2 more
openaire   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

One-pot synthesis of block-copolyrotaxanes through controlled rotaxa-polymerization

Beilstein Journal of Organic Chemistry, 2017
The aqueous reversible addition fragmentation chain-transfer (RAFT) copolymerization of isoprene and bulky comonomers, an acrylate and an acrylamide in the presence of methylated β-cyclodextrin was employed for the first time to synthesize block ...
Jessica Hilschmann, Gerhard Wenz, Gergely Kali   +2 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Generalized reverse derivations on semiprime rings

Siberian Mathematical Journal, 2015
Let \(R\) be a semiprime ring, \(I\) a nonzero ideal of \(R\) and \(d\) a reverse derivation of \(R\), that is \(d\colon R\to R\) is additive and for all \(x,y\in R\), \(d(xy)=d(y)x+yd(x)\). If also \(F\colon R\to R\) is additive then call the pair \((F,d)\) an \(l\)-generalized reverse derivation of \(R\) if for all \(x,y\in R\), \(F(xy)=F(y)x+yd(x)\),
Aboubakr, A., González, S.
openaire   +1 more source

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

An Introduction to i-Commutative Rings

Mathematics
In this paper, we introduce a new class of rings, called i-commutative rings, by extending the concept of commutative-like rings using idempotent elements.
Muhammad Saad, Usama A. Aburawash, Ahmed M. A. El-Sayed, Nour Nabil   +3 more
doaj   +1 more source