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1. Relativistic Faddeev 3D equations for three-body bound states without two-body t -matrices

   https://doi.org/10.1093/ptep/ptad153  

   Mohammadzadeh, M. ; Radin, M. ; Hadizadeh, M. R. ( December 2023 , Progress of Theoretical and Experimental Physics)

   This paper explores a novel revision of the Faddeev equation for three-body (3B) bound states, as initially proposed in Ref. [J. Golak, K. Topolnicki, R. Skibiński, W. Glöckle, H. Kamada, A. Nogga, Few Body Syst. 54, 2427 (2013)]. This innovative approach, referred to as t-matrix-free in this paper, directly incorporates two-body (2B) interactions and completely avoids the 2B transition matrices. We extend this formalism to relativistic 3B bound states using a three-dimensional (3D) approach without using partial wave decomposition. To validate the proposed formulation, we perform a numerical study using spin-independent Malfliet–Tjon and Yamaguchi interactions. Our results demonstrate that the relativistic t-matrix-free Faddeev equation, which directly implements boosted interactions, accurately reproduces the 3B mass eigenvalues obtained from the conventional form of the Faddeev equation, referred to as t-matrix-dependent in this paper, with boosted 2B t-matrices. Moreover, the proposed formulation provides a simpler alternative to the standard approach, avoiding the computational complexity of calculating boosted 2B t-matrices and leading to significant computational time savings.

    

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2. A three body problem: a genuine hetero tri metallic molecule vs. a mixture of two parent hetero bi metallic molecules

   https://doi.org/10.1039/c8sc00917a  

   Han, Haixiang ; Wei, Zheng ; Barry, Matthew C. ; Carozza, Jesse C. ; Alkan, Melisa ; Rogachev, Andrey Yu ; Filatov, Alexander S. ; Abakumov, Artem M. ; Dikarev, Evgeny V. ( January 2018 , Chemical Science)

   This work raises a fundamental question about the “real” structure of molecular compounds containing three different metals: whether they consist of genuine hetero tri metallic species or of a mixture of parent hetero bi metallic species. Heterotrimetallic complex Li 2 CoNi(tbaoac) 6 ( 1 , tbaoac = tert -butyl acetoacetate) has been designed based on the model tetranuclear structure featuring two transition metal sites in order to be utilized as a molecular precursor for the low-temperature preparation of the LiCo 0.5 Ni 0.5 O 2 battery cathode material. An investigation of the structure of 1 appeared to be very challenging, since the Co and Ni atoms have very similar atomic numbers, monoisotopic masses, and radii as well as the same oxidation state and coordination number/environment. Using a statistical analysis of heavily overlaid isotope distribution patterns of the [Li 2 MM′L 5 ] + (M/M′ = Co 2 , Ni 2 , and CoNi) ions in DART mass spectra, it was concluded that the reaction product 1 contains both heterotrimetallic and bimetallic species. A structural analogue approach has been applied to obtain Li 2 MMg(tbaoac) 6 (M = Co ( 2 ) and Ni ( 3 )) complexes that contain lighter, diamagnetic magnesium in the place of one of the 3d transition metals. X-ray crystallography, mass spectrometry, and NMR spectroscopy unambiguously confirmed the presence of three types of molecules in the reaction mixture that reaches an equilibrium, Li 2 M 2 L 6 + Li 2 Mg 2 L 6 ↔ 2Li 2 MMgL 6 , upon prolonged reflux in solution. The equilibrium mixture was shown to have a nearly statistical distribution of the three molecules, and this is fully supported by the results of theoretical calculations revealing that the stabilization energies of hetero tri metallic assemblies fall exactly in between those for the parent hetero bi metallic species. The LiCo 0.5 Ni 0.5 O 2 quaternary oxide has been obtained in its phase-pure form by thermal decomposition of heterometallic precursor 1 at temperatures as low as 450 °C. Its chemical composition, structure, morphology, and transition metal distribution have been studied by X-ray and electron diffraction techniques and compositional energy-dispersive X-ray mapping with nanometer resolution. The work clearly illustrates the advantages of heterometallic single-source precursors over the corresponding multi-source precursors. 

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3. Evolutionary convergence in body shape obscures taxonomic diversity in species of the African Labeo forskalii group: Case study of L. parvus Boulenger 1902 and L. ogunensis Boulenger 1910

   https://doi.org/10.1111/jfb.15148  

   Liyandja, Tobit L.D. ; Armbruster, Jonathan W. ; Poopola, Michael O. ; Stiassny, Melanie L. ( October 2022 , Journal of Fish Biology)
4. EQS Res-HBC: A 65-nm Electro-Quasistatic Resonant 5–240 μ W Human Whole-Body Powering and 2.19 μ W Communication SoC With Automatic Maximum Resonant Power Tracking

   https://doi.org/10.1109/JSSC.2022.3142177  

   Modak, Nirmoy ; Das, Debayan ; Nath, Mayukh ; Chatterjee, Baibhab ; K, Gaurav Kumar ; Maity, Shovan ; Sen, Shreyas ( March 2022 , IEEE Journal of Solid-State Circuits)
5. Disparate peroxisome‐related defects in Arabidopsis pex6 and pex26 mutants link peroxisomal retrotranslocation and oil body utilization

   https://doi.org/10.1111/tpj.13641  

   Gonzalez, Kim L. ; Fleming, Wendell A. ; Kao, Yun‐Ting ; Wright, Zachary J. ; Venkova, Savina V. ; Ventura, Meredith J. ; Bartel, Bonnie ( August 2017 , The Plant Journal)

   Catabolism of fatty acids stored in oil bodies is essential for seed germination and seedling development in Arabidopsis. This fatty acid breakdown occurs in peroxisomes, organelles that sequester oxidative reactions. Import of peroxisomal enzymes is facilitated by peroxins includingPEX5, a receptor that delivers cargo proteins from the cytosol to the peroxisomal matrix. After cargo delivery, a complex of thePEX1 andPEX6ATPases and thePEX26 tail‐anchored membrane protein removes ubiquitinatedPEX5 from the peroxisomal membrane. We identified Arabidopsispex6andpex26mutants by screening for inefficient seedling β‐oxidation phenotypes. The mutants displayed distinct defects in growth, response to a peroxisomally metabolized auxin precursor, and peroxisomal protein import. The lowPEX5 levels in these mutants were increased by treatment with a proteasome inhibitor or by combiningpex26with peroxisome‐associated ubiquitination machinery mutants, suggesting that ubiquitinatedPEX5 is degraded by the proteasome when the function ofPEX6 orPEX26 is reduced. Combiningpex26with mutations that increasePEX5 levels either worsened or improvedpex26physiological and molecular defects, depending on the introduced lesion. Moreover, elevatingPEX5 levels via a35S:PEX5transgene exacerbatedpex26defects and ameliorated the defects of only a subset ofpex6alleles, implying that decreasedPEX5 is not the sole molecular deficiency in these mutants. We found peroxisomes clustered around persisting oil bodies inpex6andpex26seedlings, suggesting a role for peroxisomal retrotranslocation machinery in oil body utilization. The disparate phenotypes of thesepexalleles may reflect unanticipated functions of the peroxisomalATPase complex.

    

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