Results 71 to 80 of about 307,494 (239)

N,N′-Dimethyl-N,N′-bis(pyridin-2-yl)methanediamine

Acta Crystallographica Section E, 2011
The title compound, C13H16N4, consists of two pyridine rings which are linked by an N,N′-dimethylmethaneamine chain. The pyridine rings adopt a twist conformation and the dihedral angle between them is 60.85 (5)°. The crystal
Moon-Sun Lee, Minyoung Yoon, O-bong Yang, Dong-Heon Lee, Gyungse Park   +4 more
doaj   +1 more source

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

N-[(Z)-(1-Methyl-1H-pyrrol-2-yl)methylidene]-1H-1,2,4-triazol-5-amine

Acta Crystallographica Section E, 2009
In the title compound, C8H9N5, a Schiff base derived from N-methylpyrrole-2-carbaldehyde and 3-amino-1,2,4-triazole, the C=N double bond linking the two aromatic rings has a Z conformation. The two rings are twisted by 24.20 (5)°.
Zahid H. Chohan, Muhammad Hanif, M. Nawaz Tahir   +2 more
doaj   +1 more source

Monopole-antimonopole chains and vortex rings [PDF]

Physical Review D, 2004
We consider static axially symmetric solutions of SU(2) Yang-Mills-Higgs theory. The simplest such solutions represent monopoles, multimonopoles and monopole-antimonopole pairs. In general such solutions are characterized by two integers, the winding number m of their polar angle, and the winding number n of their azimuthal angle.
Kleihaus, Burkhard, Kunz, Jutta, Shnir, Yasha   +2 more
openaire   +2 more sources

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

Structure and Rank of a Cyclic Code over a Class of Nonchain Rings

Journal of Mathematics
The rings Z4+νZ4 have been classified into chain rings and nonchain rings based on the values of ν2∈Z4+νZ4. In this paper, the structure of a cyclic code of arbitrary length over the rings Z4+νZ4 for those values of ν2 for which these are nonchain rings ...
Nikita Jain, Sucheta Dutt, Ranjeet Sehmi
doaj   +1 more source

(E)-1-(2,5-Dimethyl-3-thienyl)-3-(2,4,5-trimethoxyphenyl)prop-2-en-1-one

Acta Crystallographica Section E, 2010
In the title compound, C18H20O4S, the thiophene and benzene rings are oriented at a dihedral angle of 10.83 (11)°. The central chain makes dihedral angles of 1.86 (13) and 9.25 (12)° with the benzene and ...
Abdullah M. Asiri, Salman A. Khan, M. Nawaz Tahir   +2 more
doaj   +1 more source

Structure and dynamics of ring polymers: entanglement effects because of solution density and ring topology

, 2011
The effects of entanglement in solutions and melts of unknotted ring polymers have been addressed by several theoretical and numerical studies. The system properties have been typically profiled as a function of ring contour length at fixed solution ...
Alim K., Angelo Rosa, Auhl R., Baiesi M., Bao X. R., Bishop M., Cates M. E., Cristian Micheletti, de Gennes P.-G., des Cloizeaux J., Doi M., Drube F., Eisenhaber F., Enzo Orlandini, Everaers R., Gonzalez O., Grosberg A., Grosberg A. Y., Halverson J. D., Halverson J. D., Hess B., Hur K., Hur K., Kapnistos M., Katritch V., Kim E.-G., Kremer K., Lahmar F., Lai P.-Y., Luca Tubiana, Marcone B., Marenduzzo D., Matsuda H., Micheletti C., Millett K. C., Moore N. T., Morse D. C., Müller M., Müller M., Orlandini E., Orlandini E., Plimpton S., Quake S. R., Reith D., Rosa A., Rubinstein M., Rubinstein M., Rudnick J., Tsolou G., Tubiana L., Tubiana L., Tzoumanekas C., Tzoumanekas C., Uchida N., Vettorel T., Virnau P., Vologodskii A., Weber C., Wischnewski S. A., Witz G., Zimm B. H.   +60 more
core   +1 more source

Semigroups, Rings, and Markov Chains

Journal of Theoretical Probability, 2000
We analyze random walks on a class of semigroups called ``left-regular bands''. These walks include the hyperplane chamber walks of Bidigare, Hanlon, and Rockmore. Using methods of ring theory, we show that the transition matrices are diagonalizable and we calculate the eigenvalues and multiplicities.
openaire   +2 more sources

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