Pervasive nanoscale deformation twinning as a catalyst for efficient energy dissipation in a bioceramic armour

Double network (DN) hydrogels as promising soft-and-tough materials intrinsically possess extraordinary mechanical strength and toughness due to their unique contrasting network structures, strong interpenetrating network entanglement, and efficient energy dissipation.

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Merging black holes of any size and hierarchy

Proceedings of the International Astronomical Union ◽

10.1017/s1743921319007105 ◽

2019 ◽

Vol 14 (S351) ◽

pp. 430-433

Author(s):

Giacomo Fragione

Keyword(s):

Black Holes ◽

Energy Dissipation ◽

Galactic Nuclei ◽

Crucial Importance ◽

Intermediate Mass ◽

Binary Black Holes ◽

Efficient Energy ◽

Catalysis Process

AbstractWith the hundreds of merging binary black holes (BHs) expected to be detected by LIGO, LISA, and other upcoming instruments, the modelling of astrophysical channels that lead to the formation of compact BH binaries has become of crucial importance. BHs of any size can form bound systems in every astrophysical environment, from the field to galactic nuclei. If a binary is too wide, it needs a catalysis process to harden and merge, as in the case a third objects orbiting the BH binary on a distant orbit. In this case, Kozai-Lidov cycles can pump up the binary eccentricity, thus driving it to a merger thanks to efficient energy dissipation at the pericenter. Some remarkable scenarios where the Kozai-Lidov mechanism operates are in triple and quadruple systems of stellar BHs, and in intermediate-mass BH-stellar BH binaries in orbit around a central supermassive BH in galactic nuclei.

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Dynamical Origin of Highly Efficient Energy Dissipation in Soft Magnetic Nanoparticles for Magnetic Hyperthermia Applications

Physical Review Applied ◽

10.1103/physrevapplied.9.054037 ◽

2018 ◽

Vol 9 (5) ◽

Cited By ~ 5

Author(s):

Min-Kwan Kim ◽

Jaegun Sim ◽

Jae-Hyeok Lee ◽

Miyoung Kim ◽

Sang-Koog Kim

Keyword(s):

Magnetic Nanoparticles ◽

Energy Dissipation ◽

Magnetic Hyperthermia ◽

Soft Magnetic ◽

Efficient Energy ◽

Highly Efficient ◽

Dynamical Origin

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Plastic deformation and twinning mechanisms in magnesian calcites: a non-equilibrium computer simulation study

Physical Chemistry Chemical Physics ◽

10.1039/c7cp06924c ◽

2018 ◽

Vol 20 (3) ◽

pp. 1794-1799 ◽

Cited By ~ 2

Author(s):

Sanha Lee ◽

Gøran Brekke-Svaland ◽

Fernando Bresme

Keyword(s):

Computer Simulation ◽

Plastic Deformation ◽

Energy Dissipation ◽

Simulation Study ◽

Mechanical Response ◽

Deformation Twinning ◽

Computer Simulation Study ◽

Crystalline Structures ◽

Non Equilibrium

Deformation twinning provides a mechanism for energy dissipation in crystalline structures, with important implications on the mechanical response of carbonate biogenic materials.

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Orange carotenoid protein burrows into the phycobilisome to provide photoprotection

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1523680113 ◽

2016 ◽

Vol 113 (12) ◽

pp. E1655-E1662 ◽

Cited By ~ 52

Author(s):

Dvir Harris ◽

Ofir Tal ◽

Denis Jallet ◽

Adjélé Wilson ◽

Diana Kirilovsky ◽

...

Keyword(s):

Energy Dissipation ◽

Cross Linking ◽

Tandem Mass ◽

Cross Link ◽

Linker Region ◽

Efficient Energy ◽

The Core ◽

Terminal Domain ◽

Orange Carotenoid Protein ◽

Total Energy Dissipation

In cyanobacteria, photoprotection from overexcitation of photochemical centers can be obtained by excitation energy dissipation at the level of the phycobilisome (PBS), the cyanobacterial antenna, induced by the orange carotenoid protein (OCP). A single photoactivated OCP bound to the core of the PBS affords almost total energy dissipation. The precise mechanism of OCP energy dissipation is yet to be fully determined, and one question is how the carotenoid can approach any core phycocyanobilin chromophore at a distance that can promote efficient energy quenching. We have performed intersubunit cross-linking using glutaraldehyde of the OCP and PBS followed by liquid chromatography coupled to tandem mass spectrometry (LC/MS-MS) to identify cross-linked residues. The only residues of the OCP that cross-link with the PBS are situated in the linker region, between the N- and C-terminal domains and a single C-terminal residue. These links have enabled us to construct a model of the site of OCP binding that differs from previous models. We suggest that the N-terminal domain of the OCP burrows tightly into the PBS while leaving the OCP C-terminal domain on the exterior of the complex. Further analysis shows that the position of the small core linker protein ApcC is shifted within the cylinder cavity, serving to stabilize the interaction between the OCP and the PBS. This is confirmed by a ΔApcC mutant. Penetration of the N-terminal domain can bring the OCP carotenoid to within 5–10 Å of core chromophores; however, alteration of the core structure may be the actual source of energy dissipation.

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