Evidence map›Paper›PMID 41832241›Full record

ArticleScientific reports2026

Gravitational effects on the hydrogen bond network of water and ionic solutions revealed by near infrared spectroscopy under simulated microgravity.

Mika Ishigaki, Koyo Koizumi, Kotomi Asano, Naoki Okamoto, Go Takehi, Riku Sasamoto, Masato Takeuchi, Roumiana Tsenkova, Mio Matsui, Aiko Nagamatsu and 1 more

Abstract read
In one paragraph

Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

Mika IshigakiInstitute of Agricultural and Life Sciences, Shimane University, Matsue, Japan. ishigaki@life.shimane-u.ac.jp.
Koyo KoizumiMIRAI Technology Institute, Shiseido Co., Ltd., Yokohama, Japan.
Kotomi AsanoInstitute of Agricultural and Life Sciences, Shimane University, Matsue, Japan.
Naoki OkamotoMIRAI Technology Institute, Shiseido Co., Ltd., Yokohama, Japan.
Go TakehiMIRAI Technology Institute, Shiseido Co., Ltd., Yokohama, Japan.
Riku SasamotoDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, Osaka, Japan.
Masato TakeuchiDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, Osaka, Japan.
Roumiana TsenkovaGraduate School of Agricultural Science, Kobe University, Kobe, Japan.
Mio MatsuiSpace Exploration Innovation Hub Center, Japan Aerospace Exploration Agency, Sagamihara, Japan.
Aiko NagamatsuSpace Exploration Innovation Hub Center, Japan Aerospace Exploration Agency, Sagamihara, Japan.
Mariko EgawaMIRAI Technology Institute, Shiseido Co., Ltd., Yokohama, Japan. mariko.egawa@shiseido.com.

Funding

Japan Aerospace Exploration Agency RFP10(13)-05
6 · The paper itself

Abstract

The near-infrared spectra of ultrapure water and five types of ionic aqueous solutions were recorded under normal and simulated microgravity (< 0.1 G). The water band at approximately 1450 nm, corresponding to the combination of O–H symmetric and antisymmetric stretching vibrations, was analyzed. The results showed that the hydrogen-bond network (HBN) weakened in both ultrapure water and all ionic solutions under microgravity. This weakening is physically reasonable when considered in terms of a slight decrease in hydrostatic pressure leading to volumetric expansion of water. Furthermore, weakening of the HBN by gravity changes was smaller than that caused by modest temperature changes of approximately 2 °C and varied depending on the type of ions present. Specifically, gravity-induced changes in the HBN of water were less pronounced in solutions containing kosmotropic anions than in solutions containing chaotropic anions. These findings suggest that even subtle changes in HBN could disrupt finely tuned biochemical reactions, potentially influencing human health in altered gravity environments.

Identifiers

PMID41832241
PMCPMC13111628

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.