Researchers at University of Tsukuba have developed a method to differentiate the topography of medieval mountain castles from that of natural ridges using airborne light detection and ranging (LiDAR) data. This method is expected to be useful for detecting historically modified terrain, such as archaeological sites in mountainous regions, as well as for assessing the extent of topographic modifications and estimating the potential risk of landslides on modified slopes.

Researchers revealed how zinc levels control the endoplasmic reticulum (ER), the cell’s primary protein factory, and how it fundamentally regulates cellular proteostasis. Using fluorescent probes, they found that the transporter ZIP7 keeps zinc levels in the ER low. When ZIP7 is disrupted, zinc level surges, inhibiting the enzyme Ero1 and disrupting the cell’s redox balance. This prevents proteins from folding correctly, leading to an array of pathologies including cancer.

Oxygen transport, a vital process for sustaining life, is carried out by red blood cells that deliver oxygen to tissues through microscopic capillary networks. Now, researchers from Kyushu University and Institute of Science Tokyo have developed a computational model that simulates this process by combining blood flow, chemical reactions, and oxygen consumption within one system. These simulations reveal that RBCs can adjust the amount of oxygen released based on surrounding oxygen levels, thereby maintaining a stable oxygen concentration across tissues.

Utilizing mice, researchers have identified the "organizer cells" responsible for building bone during fetal development. The study reveals a two-phase program led by RANKL-producing "organizer cells": early-stage septoclasts clear cartilage to create space, followed by LepR⁺ bone marrow stromal cells that sustain the marrow environment. This developmental blueprint is reactivated during fracture healing, offering a novel therapeutic target for bone diseases like osteoporosis by focusing on niche cells rather than the bone-destroying cells themselves.

An article published in The Journal of Physical Chemistry Letters describes a new transient absorption microscope developed by a research group led by Prof. Toru Kondo at the National Institute for Basic Biology (NIBB) / the Exploratory Research Center on Life and Living Systems (ExCELLS) / SOKENDAI. This microscope integrates a unique optical alignment for single-objective absorption microscopy, a highly sensitive balanced detector, and lock-in-amplified detection, allowing femtosecond time-resolved transient absorption measurements to be performed continuously at a high repetition rate. Moreover, steady-state absorption and fluorescence measurements, i.e., simultaneous absorption and fluorescence imaging, can be performed. Furthermore, the fluorescence spectrum and lifetime can be acquired. The spatial resolution is ~300 nanometers, near the diffraction limit; the temporal resolution is less than 200 femtoseconds; and the detection sensitivity of the transient absorption signal is about 10^–7 in absorbance, approaching the single-molecule level.

Researchers from the National Institute for Physiological Sciences, Nagoya City University, and Tokyo Metropolitan Institute of Medical Science in Japan have discovered ion channel molecules that respond directly to extracellular potassium, revealing a similar potassium-binding mechanism in fruit flies and humans. This discovery may point to previously unexplored mechanisms for sensing extracellular K⁺ and its homeostasis, potentially leading to new therapeutic targets.

How food is shared inside ant colonies has long been invisible in real time. Researchers in Japan have now used a highly sensitive radioactive imaging technique to watch food move from ant to ant, minute by minute. The method reveals unexpected patterns in how resources spread through a group and could help scientists detect early warning signs of stress or imbalance in insect societies, crucial to ecosystems and agriculture.

China’s “Wolf Warrior Diplomacy,” known for its confrontational tone, may be counterproductive in East Asia. However, its impact on public opinion in Japan, South Korea, and Taiwan remains unclear. Now, researchers have found that exposure to such messaging reduced favorability toward China, especially in South Korea. While some perceptions of the United States also declined, these effects were inconsistent. In addition, participants were reluctant to share such messages, suggesting limited persuasive power.

A joint research group consisting of Hikaru Ichida, a doctoral student in the Division of Nano Life Science, Graduate School of Frontier Science Initiative, Kanazawa University; Kosuke Mizuno, currently a Postdoctoral Researcher at the Institute for Protein Research, The University of Osaka; Professor Noriyuki Kodera and Associate Professor Holger Flechsig of the Nano Life Science Institute (WPI-NanoLSI), Kanazawa University; and Associate Professor Satoshi Toda of the Institute for Protein Research, The University of Osaka, has succeeded in visualizing the structural dynamics underlying how the serum protein Afamin stabilizes and transports Wnt3a, a lipid-modified signaling molecule. The study also showed that stable binding between these two molecules depends on both a hydrophobic pocket that accommodates Wnt3a and the structural integrity of Afamin. Wnt proteins are essential molecules that help the body develop properly and maintain healthy tissues. However, because they do not dissolve well in water and are highly hydrophobic, they tend to be unstable in the body. This study has revealed part of the mechanism by which Wnt3a is stably transported with the help of another protein. These findings are expected to deepen our understanding of biological processes involving Wnt3a and may contribute in the future to the development of ex vivo tissue engineering technologies and regenerative medicine.

Nanographenes are organic semiconductor materials used in smartphones, OLED displays, and solar cells. At the molecular level, they are composed of polycyclic aromatic hydrocarbons (PAHs) which are a network of connected benzene rings (hexagon-shaped carbon molecules). Chemists can modify the electronic properties of PAHs by adding more benzene rings to them, changing their size and shape. As such, there is high demand for methods that can selectively extend specific sites of PAH molecules to allow greater versatility in technological applications. New research from Nagoya University introduces a new methodology for developing PAH molecules that has elucidated chemists for years.