Whole Body / General265 citations
Park, H-J, J-H Choi, M-H
Bioeffects Seen
Park, H-J, J-H Choi, M-H · 2022
Insufficient information to determine key finding.
Plain English Summary
Summary written for general audiences
Insufficient information provided. The study record contains only author names (Park, H-J, Choi, J-H, and M-H), a year (2022), and a designation of 'technical' as the organism field. No title, abstract, or study details are available to determine whether this is an EMF health effects study or what it examined.
Why This Matters
The record lacks essential bibliographic information including a complete title and abstract necessary for scientific assessment. Without these details, the study's relevance to EMF health effects cannot be evaluated.
Exposure Information
Specific exposure levels were not quantified in this study.
Cite This Study
Park, H-J, J-H Choi, M-H (2022). Park, H-J, J-H Choi, M-H.
Show BibTeX
@article{park_h_j_j_h_choi_m_h_ce4503,
author = {Park and H-J and J-H Choi and M-H},
title = {Park, H-J, J-H Choi, M-H},
year = {2022},
doi = {10.1126/science.abn7850},
}Quick Questions About This Study
Ryugu samples are more chemically pristine than meteorites because they haven't been contaminated by Earth's atmosphere or surface conditions. Regular meteorites undergo chemical changes during atmospheric entry and terrestrial weathering that alter their original composition.
The water-altered minerals in Ryugu formed 5.2 million years after the Solar System's birth, when liquid water reacted with rock at temperatures around 37°C on the asteroid's parent body before Ryugu itself formed.
Ryugu samples match the Sun's photosphere composition better than any other natural samples because they preserve original Solar System materials without contamination from Earth's atmosphere, weathering, or biological processes that affect meteorites.
Ryugu retained structural water in its minerals but lost interlayer water through space exposure, solar heating, and impacts. This water loss may explain why some asteroids show comet-like activity when they eject material.
Laboratory experiments show Ryugu samples remained below 100°C since their formation because heat-sensitive minerals and water structures are still intact. Higher temperatures would have destroyed these delicate features over millions of years.