Results 91 to 100 of about 43,251,177 (344)
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
A GEOMETRICAL PARTICLE MODEL FOR ANYONS [PDF]
Modern Physics Letters A, 1999 We consider the simplest geometrical particle model associated with light-like curves in (2+1) dimensions. The action is proportional to the pseudo-arc length of the particle's path. We show that under quantization, it yields the (2+1)-dimensional anyonic field equation supplemented with a Majorana-like relation on mass and spin, i.e. mass × spin =α2,
Nersessian, A., Ramos, E.
openaire +2 more sources
Collisional particle-phase pressure in particle-fluid flows at high particle inertia
, 2005 Particle-phase pressure has to be considered in two-fluid models describing particle-fluid flows, and is important for the stability of such flows.
Ge, W, Wang, JW, Wei Ge, Junwu Wang
core +1 more source
Modified Generalized Beam Lattice Model Associated With Fracture Of Reinforced Fiber/Particle Composites [PDF]
, 2008 Lattice-type model can simulate in a straightforward manner heterogeneous brittle media. Mohr-Coulomb failure criterion has recently been involved into the generalized beam (GB) lattice model, and as a result, numerical experiments on concrete under ...
Zhao ZY, 邓守春, 梁乃刚, Liu JX
core +1 more source
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Maximizing the energy efficiency of induced draft and hybrid draft cooling towers
Case Studies in Thermal EngineeringCooling towers consume energy in the order of several hundred kilowatts for operating fans and pumps for driving air and water through the tower. Therefore, it is financially advantageous and environmentally friendly to optimize the fan operation of a ...
Chamanthi D. Jayaweera +7 more
doaj +1 more source
Baryon number fluctuations in quasi-particle model
European Physical Journal C: Particles and Fields, 2017 Baryon number fluctuations are sensitive to the QCD phase transition and the QCD critical point. According to the Feynman rules of finite-temperature field theory, we calculated various order moments and cumulants of the baryon number distributions in ...
Ameng Zhao, Xiaofeng Luo, Hongshi Zong
doaj +1 more source
A mechanistic particle flux model applied to the oceanic phosphorus cycle [PDF]
Biogeosciences, 2014 The sinking and decomposition of particulate organic matter are critical processes in the ocean's biological pump, but are poorly understood and crudely represented in biogeochemical models.
T. DeVries, J.-H. Liang, C. Deutsch
doaj +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
, 2021 Pollutant particles emission has been a major source of worry for many years due to their negative health impacts. For health risk assessment, it is critical to understand how to assess pollutant particles transportation and deposition (TD) in human lung
Islam, Mohammad S. +4 more
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