[Evaluation of sacral pressure ulcers of older long-term hospital patients for five or fewer years].

Aim: This study aimed to examine the statuses of sacral pressure ulcer and treatment strategies for 135 elderly patients who were long-term hospital patients.

Methods: Patients with sacral pressure ulcers were divided into two groups, the cured or non-cured, and the discharged or deceased.The mean age, length of hospital stay, diagnosis, bedridden degree, nutritional status pre and post ulcer development, nutritional administration method, presence on admission or development, depth on National Pressure Ulcer Advisory Panel and treatment duration were examined.

Radical generation and bactericidal activity of nanobubbles produced by ultrasonic irradiation of carbonated water.

Our previous study showed that nanobubbles (NBs) encapsulating CO gas have bactericidal activity due to reactive oxygen species (ROS) (Yamaguchi et al., 2020). Here, we report that bulk NBs encapsulating CO can be efficiently generated by ultrasonically irradiating carbonated water using a piezoelectric transducer with a frequency of 1.

The Arctic summer microbiome across Fram Strait: Depth, longitude, and substrate concentrations structure microbial diversity in the euphotic zone.

The long-term dynamics of microbial communities across geographic, hydrographic, and biogeochemical gradients in the Arctic Ocean are largely unknown. To address this, we annually sampled polar, mixed, and Atlantic water masses of the Fram Strait (2015-2019; 5-100 m depth) to assess microbiome composition, substrate concentrations, and oceanographic parameters. Longitude and water depth were the major determinants (~30%) of microbial community variability.

Two-dimensional water-molecule-cluster layers at nanobubble interfaces.

Hypothesis: Bulk nanobubbles (NBs) have high surface charge densities and long lifetimes. Despite several attempts to understand the lifetime of NBs, their interfacial layer structure remains unknown. It is hypothesized that a specific interfacial layer exists with a hydrogen bond network that stabilizes NBs.

A nearby long gamma-ray burst from a merger of compact objects.

Gamma-ray bursts (GRBs) are flashes of high-energy radiation arising from energetic cosmic explosions. Bursts of long (greater than two seconds) duration are produced by the core-collapse of massive stars, and those of short (less than two seconds) duration by the merger of compact objects, such as two neutron stars. A third class of events with hybrid high-energy properties was identified, but never conclusively linked to a stellar progenitor.