With an increasing use of ultrasonography-based diagnosis, there is a need to develop affordable alternatives to conventional ultrasound gel, ensuring patient comfort. A team of researchers from Japan has recently developed a reusable, solid ultrasound gel pad composed of tamarind seed gum. This gel pad demonstrated improved patient satisfaction compared to conventional gel, eliminating discomfort such as stickiness or tickling, while showing no degradation in image quality.

For decades, families in communities around Johannesburg have been living close to huge gold mining waste dumps. For many residents the dust that is released there is just part of everyday life – but it can contain natural uranium compounds that come to the surface with the mined rock. A new study in the journal Environmental Geochemistry and Health (DOI: 10.1007/s10653-025-02874-2) reveals how this exposure is reflected in children’s hair. An international research team headed by the South African Medical Research Council and involving the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), VKTA – Strahlenschutz, Analytik & Entsorgung Rossendorf e. V. as well as the Wismut GmbH has examined samples of hair and linked them to analyses of soil samples, the test subjects’ body measurements and the evaluation of questionnaires on their living conditions.

A surface capable of responding to chemical signals generated by microorganisms and automatically producing biocidal substances – this is not a futuristic vision, but a description of how the B-STING silica nanocomposite works. The new material, developed at the Institute of Nuclear Physics Polish Academy of Sciences in Cracow, acts as a nanofactory of reactive oxygen species, activating itself only when necessary.

What started as a frustrating source of measurement error has turned into a new microscopy technique. Researchers at TU Wien show that by combining optical and mechanical microscopy, the refractive index of biological materials can be mapped with unprecedented spatial resolution.

Miniaturizing gas chromatography has long been constrained by the need for external pumps and valves, limiting portability, reliability, and scalability.

Holographic multiplexing has long relied on intrinsic optical degrees of freedom, limiting its further development. Researchers in China have now introduced the optical operator as a synthetic dimension, enabling operator-specific holograms that respond only to predefined transformation pathways. This approach boosts traditional orbital angular momentum (OAM) holography capacity by 9-fold experimentally and enhances security for optical encryption, opening a scalable paradigm for ultrahigh-dimensional information technologies.

Paper-based packaging is widely regarded as a sustainable alternative to petroleum-derived plastics, yet its poor resistance to water and oil has long limited real-world applications. In a recent study published in Journal of Bioresources and Bioproducts, researchers report a lignin nanoparticle–stabilized Pickering emulsion coating that simultaneously enhances barrier performance, mechanical strength, recyclability, and biodegradability of paper. By combining polyvinyl alcohol, stearic acid, and lignin nanoparticles into a single emulsion system, the coated paper achieves water and oil resistance comparable to plastic-coated paper while remaining fully degradable and easily recyclable. The work highlights the potential of biomass-derived nanomaterials to advance sustainable packaging technologies.