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‘Ultra-strength’ cocaine hits UK streets as deaths surge to record high
‘Ultra-strength’ cocaine hits UK streets as deaths surge to record high Exclusive: Cocaine deaths have hit record levels, with more than 1,000 people dying last year. Alex Ross finds the purity of the street drug has increased amid a boom in production in Latin America - Bookmark A lethal wave of “ultra strength” cocaine is emerging across the UK as deaths linked to the party drug have spiralled to a record high, The Independent can reveal. A boom of cocaine in South America has triggered...
Chaperonin recognition of protein dynamics drives drug resistance
The emergence of drug resistance is typically driven by mutations that alter drug-target affinity, yet the role of host cellular machinery regulating these processes remains unclear. Here, we reveal that the chaperonin GroEL/S promotes drug resistance through recognition of protein dynamics. Using directed evolution of E. coli DHFR under antibiotic stress and varying GroEL/S expression, we identify a well-folded resistance variant whose fitness, despite tight inhibitor binding, is critically...
Magnetic Resonance Dynamics via Fractional Bloch Equation: a Hybrid Computational Framework
arXiv:2605.30856v1 Announce Type: new Abstract: Bloch equations are a powerful tool in describing the dynamics of nuclear magnetization in magnetic resonance phenomena. The fractional generalization of the Bloch equation effectively captures the anomalous relaxation and diffusion in porous, heterogeneous, and complex media. These equations describe how nuclear magnetization evolves under the influence of magnetic fields and relaxation processes.
Explained: The reasons behind India’s falling infant mortality rate
NEW DELHI: India has recorded a significant decline in infant deaths over the past decade, with the Infant Mortality Rate (IMR) falling to 24 deaths per 1,000 live births in 2024. Yet behind the national progress lies a sharply uneven picture, with some states approaching developed-world child survival standards while others continue to struggle with high infant mortality despite improvements in institutional healthcare. The latest Sample Registration System (SRS) Report 2024 shows that...
Parahydrogen Cooling of Nuclear Spin Chains at Hypogeomagnetic Fields
Announce Type: cross Abstract: Solution-state molecular nuclear spin networks are promising quantum simulators because their scalar-coupling Hamiltonians are chemically programmable, precisely measurable, and coherent at room temperature. Their main limitation for quantum information science is initialization: thermal Boltzmann polarization produces highly mixed, high-entropy states. Here, we use parahydrogen-based Signal Amplification by Reversible Exchange (SABRE) at hypogeomagnetic fields...
Distilling first-principles accuracy into compact machine learning potentials for condensed-phase chemistry
Announce Type: new Abstract: Accurate machine learning interatomic potentials (MLIPs) have made first-principles-quality potential energy surfaces increasingly accessible for condensed-phase chemistry, but their inference cost can still limit the sampling needed to compute experimentally relevant observables. In this work, we combine transfer learning and knowledge distillation to construct compact "student" models that retain the accuracy of much larger "teacher" models obtained by applying...
Secondary silylium ion drives one-pot ketone sulfonamidation, reaching 95% yields
Secondary silylium ion drives one-pot ketone sulfonamidation, reaching 95% yields Lisa Lock Scientific Editor Andrew Zinin Lead Editor A research team has developed a novel organocatalysis method based on a silylium Lewis acid. This technology employs an ion-pair catalyst combining a diethylsilylium ion with a weakly coordinating anion, enabling the direct installation of sulfonamide groups into functionalized ketone compounds, including β-ketoesters, which had previously been difficult to...