Results 121 to 130 of about 155,151 (257)

An experiment for the measurement of the bound-beta decay of the free neutron

, 2006
The hyperfine-state population of hydrogen after the bound-beta decay of the neutron directly yields the neutrino left-handedness or a possible right-handed admixture and possible small scalar and tensor contributions to the weak force. Using the through-
A. R. Müller, A. Ulrich, Abe), Adelberger, Boothroyd, Byrne, Eidelman, F. J. Hartmann, G. Dollinger, Gaponenko, Haeberli, J. Friedrich, Kessler, Kuznetsov, Lamb, Musser, N. Kaiser, Nemenov, Nemenov, Omidvar, R. Hertenberger, S. Paul, T. Faestermann, Trinks, W. Schott   +24 more
core   +1 more source

Memory of Chirality in Radical Addition–Translocation–Cyclization Cascades

Helvetica Chimica Acta, EarlyView.
Radical addition–translocation–cyclization cascades of chiral alkynes show striking memory of chirality (MoC), with strong retention of configuration when fast, polarity favored cyclization are involved. The most effective system employs a highly electron‐poor pentafluorobenzenesulfonyl group.
Christian Simon Gloor, Fabrice Dénès, Valentin Soulard, Philippe Renaud   +3 more
wiley   +1 more source

Intracellular peroxynitrite perturbs redox balance, bioenergetics, and Fe–S cluster homeostasis in Mycobacterium tuberculosis

Redox Biology
The ability of Mycobacterium tuberculosis (Mtb) to tolerate nitric oxide (•NO) and superoxide (O2•−) produced by phagocytes contributes to its success as a human pathogen.
Arshiya Dewan, Charu Jain, Mayashree Das, Ashutosh Tripathi, Ajay Kumar Sharma, Harshit Singh, Nitish Malhotra, Aswin Sai Narain Seshasayee, Harinath Chakrapani, Amit Singh   +9 more
doaj   +1 more source

Synthesis of neutral nickel catalysts for ethylene polymerization – the influence of ligand size on catalyst stability [PDF]

, 2003
A facile synthesis of nickel salicylaldimine complexes with labile dissociating ligands is described. In addition to producing highly active ethylene polymerization catalysts, important insights into the effect of ligand size on catalyst stability and ...
Connor, Eric F., Grubbs, Robert H., Henderson, Jason I., Waltman, Andrew W., Younkin, Todd R.   +4 more
core   +1 more source

Macrophage extracellular vesicles deliver Mef2d proteins to aggravate Bacteroides fragilis pathogenicity in type 2 diabetes arterial calcification

Interdisciplinary Medicine, EarlyView.
Bacteroides fragilis is associated with type 2 diabetes (T2D) arterial calcification and can be activated by macrophage‐derived extracellular vesicles (EVs). BF takes up EVs via receptor‐mediated endocytosis, and activation is induced by EV‐derived Mef2d, thereby inhibiting ArsR family transcriptional regulator transcription.
Cong Chen, Rong He, Jirong Luo, Zhengfeng Liang, Qunwen Pan, Shuangquan Liu, Jingsong Cao   +6 more
wiley   +1 more source

Universal and Lineage‐Specific Patterns in the Distribution of ECOD Domain Homology Groups Across Superkingdoms

Proteins: Structure, Function, and Bioinformatics, EarlyView.
ABSTRACT Proteins are built from modular domains that serve as fundamental units of structure and evolution. While individual domains have been extensively cataloged, their collective distribution across the lineages of life has remained poorly resolved.
Rui Guo, Jimin Pei, Jing Zhang, Qian Cong, Nick V. Grishin, R. Dustin Schaeffer   +5 more
wiley   +1 more source

Movable but not removable band degeneracies in a symmorphic crystal

, 2018
Crossings of energy bands in solids that are not pinned at symmetry points in the Brillouin zone and yet cannot be removed by perturbations are thought to be conditioned on the presence of a nonsymmorphic symmetry.
de Brito, Paulo Eduardo, Johannesson, Henrik, Malard, Mariana, Ostlund, Stellan   +3 more
core   +1 more source

Host tree preference and performance of the Eurasian spruce bark beetle (Ips typographus) on Scots pine

Pest Management Science, EarlyView.
Ips typographus showed lower reproductive output in an occasional host (Pinus sylvestris) under laboratory conditions, and did not prefer its main host (Picea abies) over P. sylvestris in two‐choice bioassays. Abstract BACKGROUND The Eurasian spruce bark beetle, Ips typographus, is one of the most serious pests of Norway spruce (NS, Picea abies), with ...
Jana Gabriele Burchards, Dineshkumar Kandasamy, Martin Nils Andersson   +2 more
wiley   +1 more source

A Consistent Reduced Network for HCN Chemistry in Early Earth and Titan Atmospheres: Quantum Calculations of Reaction Rate Coefficients

, 2019
HCN is a key ingredient for synthesizing biomolecules such as nucleobases and amino acids. We calculate 42 reaction rate coefficients directly involved with or in competition with the production of HCN in the early Earth or Titan atmospheres.
Ayers, Paul W., Pearce, Ben K. D., Pudritz, Ralph E.   +2 more
core   +2 more sources

Amino acid vectorization of salicylic acid enables efficient activation of NPR1‐dependent defense without phytotoxicity

Pest Management Science, EarlyView.
Amino acid‐vectorized salicylic acid activates PR1/NPR1‐dependent defenses without phytotoxicity, showing an efficient strategy for controlled delivery and enhanced plant immunity. Abstract BACKGROUND Addressing global food security under rapid population growth and climate change requires sustainable strategies to protect crops from pathogens while ...
Ruth Oussou, Benoit Guichard, Loïc Lemée, Vincent Lebeurre, Cécile Marivingt‐Mounir, Jean‐François Chollet, Sylvain La Camera   +6 more
wiley   +1 more source