Results 81 to 90 of about 2,186,596 (297)

Charged rosettes at high and low ionic strengths

, 2002
The complexation between a semiflexible polyelectrolyte and an oppositely charged macroion leads to a multitude of structures ranging from tight complexes with the chain wrapped around the macroion to open multileafed rosette-like complexes.
Schiessel, Helmut
core   +2 more sources

Supply chain structure and demand risk [PDF]

Automatica, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chen, Ying-Ju, Seshadri, Sridhar
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

Proton nuclear magnetic resonance identification and discrimination of side chain isomers of phytosterols using a lanthanide shift reagent.

Journal of Lipid Research, 1980
Proton nuclear magnetic resonance (1H-NMR) spectra at 90 MHz were measured for a number of side chain isomers of phytosterols (sterols with a C8H17 side chain, and delta 24-, 24-methylene, delta 22-, 24-ethylidene, 24-methly, 24-ethyl, 24-methyl-delta 22-
T Iida, T Tamura, T Matsumoto
doaj   +1 more source

Tetrahedral structure or chains for liquid water [PDF]

Proceedings of the National Academy of Sciences, 2006
It has been suggested, based on x-ray absorption spectroscopy (XAS) experiments on liquid water [Wernet, Ph., et al. (2004) Science 304, 995–999], that a condensed-phase water molecule’s asymmetric electron density results in only two hydrogen bonds per water molecule on average.
Teresa, Head-Gordon, Margaret E, Johnson
openaire   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Design and analysis of linear cascade DNA hybridization chain reactions using DNA hairpins

New Journal of Physics, 2017
DNA self-assembly has been employed non-conventionally to construct nanoscale structures and dynamic nanoscale machines. The technique of hybridization chain reactions by triggered self-assembly has been shown to form various interesting nanoscale ...
Hieu Bui, Sudhanshu Garg, Vincent Miao, Tianqi Song, Reem Mokhtar, John Reif   +5 more
doaj   +1 more source

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

FEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz, Mihály Mérey, Rebeka Vásárhelyi, Ramóna Pék, Victor Imburchia, László Henn, Adrián Kószó, Nicholas D. Lakin, Ivan Ahel, Sébastien Huet, Ágnes Czibula, Gyula Timinszky   +11 more
wiley   +1 more source

Dissolution behavior of soluble small molecules in Shendong coal through fractional extraction with two-stage solvents

Meitan xuebao
In order to investigate the effects of the composition, structure, and occurrence modes of small molecules in coal on their dissolution behavior, as well as the changes in the pore structure of coal after their dissolution, Shendong coal is sequentially ...
Shujun WANG, Zitan QIAN, Xinjie HAN, Xiufeng LI, Chu ZHANG, Zhongju SHEN, Zhihong QIN   +6 more
doaj   +1 more source

Cluster structures of excited states in $^{14}$C

, 2011
Structures of excited states in $^{14}$C are investigated with a method of $\beta$-$\gamma$ constraint antisymmetrized molecular dynamics in combination with the generator coordinate method.
Tadahiro Suhara, Y. Fukushima, Yoshiko Kanada-En’yo   +2 more
core   +1 more source