Tootfinder

Excitonic Energy Transfer in Red Algal Photosystem I Reveals an Evolutionary Bridge between Cyanobacteria and Plants
Mengyuan Cui, Zihui Liu, Miriam Izzo, Junhua Zhou, Enhu He, Vandana Tiwari, Petar H. Lambrev, R. J. Dwayne Miller, Joanna Kargu, Fulu Zheng, Ajay Jha, Hong-GuangDuan
https://arxiv.org/abs/2509.24271

Excitonic Energy Transfer in Red Algal Photosystem I Reveals an Evolutionary Bridge between Cyanobacteria and Plants
Photosystem I converts light into chemical energy with near-unity quantum efficiency,yet its energy-transfer and charge-separation mechanisms remain debated. Evolution has diversified PSI architectures. The unicellular red algae Cyanidioschyzon merolae represents a key evolutionary intermediate,featuring a cyanobacterial-like monomeric core surrounded by three to five LHCR subunits. This hybrid organization provides a unique system to bridge mechanistic models across lineages. We applied two-di…

Emergent Isotropic-Nematic Transition in 3D Semiflexible Active Polymers
Twan Hooijschuur, Ehsan Irani, Antoine Deblais, Sara Jabbari-Farouji
https://arxiv.org/abs/2509.21599 ht…

Emergent Isotropic-Nematic Transition in 3D Semiflexible Active Polymers
Active semiflexible filament collectives, ranging from motor-driven cytoskeletal filaments to slender organisms such as cyanobacteria and worm aggregates, abound in nature, yet how activity and flexibility jointly govern their organization, especially Isotropic-nematic (I-N) transition, remains poorly understood. Using large-scale Brownian dynamics simulations of 3D active semiflexible polymers with varying flexibility degrees, we show that tangential active forces systematically shift the I-N …