Results 81 to 90 of about 50,863 (244)

Absorption and scattering of massless scalar waves by black holes in quasi-topological gravity

European Physical Journal C: Particles and Fields
We consider massless scalar field perturbations of regular black holes in quasi-topological gravity. After reviewing various regular black hole solutions, we compute the total absorption cross-section and the partial absorption cross-section for ...
Sihao Fan, Chen Wu, Wenjun Guo
doaj   +1 more source

Genetically Programmed Shape‐Morphing of Engineered Living Materials

Advanced Functional Materials, EarlyView.
Here, bacterial and mammalian engineered living materials (ELMs) are presented, in which living cells direct genetically programmed and enzymatically mediated shape‐morphing. The resulting deformation and shape‐recovery can be actuated in a genetically controlled manner by an ELM incorporating out‐of‐equilibrium counteracting biochemical reactions with
Jan Becker, Yuchen Liu, Miguel Baños, Rosanne Schmachtenberg, Mahmudul Hasan, Claudia Fink‐Straube, Luai R. Khoury, Wilfried Weber   +7 more
wiley   +1 more source

Evaluating the Suitability of Perfusion-Based PD Probes for Use in Altered Gravity Environments

Biosensors
Measurable changes in electrophysiology have been documented in spaceflight, creating a pathway for disease genesis and progression in astronauts. These electrophysiology changes can be measured using potential difference (PD).
Madelyn MacRobbie, Vanessa Z. Chen, Cody Paige, David Otuya, Aleksandra Stankovic, Guillermo Tearney   +5 more
doaj   +1 more source

Controlled partial gravity platform for milligravity in drop tower experiments

Review of Scientific Instruments
We detail a platform for partial gravity environment and an experiment for simulated impacts on asteroid surfaces based on it. The partial gravity environment is created by a two stage approach: First, we place the experiment in the microgravity of a free-falling drop tower capsule in the ZARM (German acronym for Center of Applied Space Technology and ...
Kolja Joeris, Matthias Keulen, Jonathan E. Kollmer   +2 more
openaire   +3 more sources

Guanosine‐Quadruplex Hydrogels as Dynamic, Mechanically Tunable and Ion Conductive 3D Scaffolds for Cell Culture Applications

Advanced Functional Materials, EarlyView.
Versatile guanosine‐quadruplex (GQ) hydrogels are developed as dynamic biomatrices for cell culture. These scaffolds are fabricated under mild aqueous conditions, present improved stability, tunable mechanical properties within physiological ranges; fibrillar, porous microstructure, ion conductivity, and cytocompatibility.
Neha Thakur, Minye Jin, Pavel Milkin, Deepa Negi, Carla Cofiño Fabres, Hubert Gojzewski, Leonid Ionov, Alla Synytska, Andries van der Meer, Robert Passier, Julieta I. Paez   +10 more
wiley   +1 more source

Effects of altered gravity on growth and morphology in Wolffia globosa implications for bioregenerative life support systems and space-based agriculture

Scientific Reports
Understanding the response of plants to varied gravitational conditions is vital for developing effective food production in space bioregenerative life support systems.
Leone Ermes Romano, Jack J. W. A. van Loon, Luigi Gennaro Izzo, Maurizio Iovane, Giovanna Aronne   +4 more
doaj   +1 more source

Advances in 3D Bioprinting for Breast Cancer Modeling: Tumor Microenvironment, Metastasis, and Drug Screening

Advanced Healthcare Materials, EarlyView.
Three‐dimensional bioprinting transforms breast cancer modeling from simple constructs into spatially organized, multicellular, perfused, and patient‐derived platforms. This review shows how bioinks, cellular composition, architecture, and flow govern tumor behavior and drug response, while revealing why complexity alone is insufficient without ...
Mustafa Nakipoglu, Mahboobeh Mahmoodi, Ehsanul Hoque Apu, Fahimeh Shahabipour, Sibel Emir Diltemiz, Sanjib Saha, Halima Alem, Nureddin Ashammakhi   +7 more
wiley   +1 more source

End of the world brane meets T T ¯ $$ T\overline{T} $$

Journal of High Energy Physics
End of the world branes in AdS have been recently used to study problems deeply connected to quantum gravity, such as black hole evaporation and holographic cosmology.
Feiyu Deng, Zhi Wang, Yang Zhou
doaj   +1 more source

Gauge symmetry and constraints structure for topologically massive AdS gravity: a symplectic viewpoint

European Physical Journal C: Particles and Fields, 2018
By applying the Faddeev–Jackiw symplectic approach we systematically show that both the local gauge symmetry and the constraint structure of topologically massive gravity with a cosmological constant $$\Lambda $$ Λ , elegantly encoded in the zero-modes ...
Omar Rodríguez-Tzompantzi, Alberto Escalante   +1 more
doaj   +1 more source

Comprehensive In Vitro Profiling Demonstrates Successful Immune Evasion of Bioengineered Immune‐Shielded Heart Valves

Advanced Healthcare Materials, EarlyView.
Living donor heart valves offer superior durability for pediatric patients but trigger immune rejection. Lentiviral delivery of viral immune‐evasion genes US2 and Serpin b9 into donor valve cells and valve tissue suppresses HLA expression, reduces PBMC clustering and cytotoxic killing, and induces transcriptional immune‐tolerance programs, paving the ...
Abraham van Wijk, Leanne Van den Berg, Isa B. M. Velraeds, Valentina Osorio Zuluaga, Emma T. M. Peereboom, Martijn J. W. E. Rabelink, Arnaud Zaldumbide, Rob C. Hoeben, Marie‐Jose T. H. Goumans, Eric Spierings, Carlijn V. C. Bouten, Marijn C. Peters   +11 more
wiley   +1 more source