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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Bones contain a relatively small number of cells entrenched in a matrix of organic and inorganic components. Although bone cells compose only a small amount of the bone volume, they are crucial to its function. Four types of cells are found within the bone tissue— osteoblasts, osteocytes, osteogenic cells, and osteoclasts.
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Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
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The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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Related Experiment Video

Updated: Jan 27, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Synchrotron radiation techniques boost the research in bone tissue engineering.

Maddalena Mastrogiacomo1, Gaetano Campi2, Ranieri Cancedda3

  • 1Department of Internal Medicine, University of Genoa, Genoa, Italy; Biotherapy Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy.

Acta Biomaterialia
|March 19, 2019
PubMed
Summary
This summary is machine-generated.

X-ray Synchrotron radiation techniques, like micro-tomography and micro-diffraction, reveal detailed bone formation processes in vivo. These advanced methods enhance understanding of biomineralization and vascularization for bone tissue engineering.

Keywords:
Bone regenerationMicrodiffractionSynchrotron radiationVascularizationmicroCT

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Area of Science:

  • Biomaterials Science
  • Medical Imaging
  • Regenerative Medicine

Background:

  • Bone tissue engineering aims to regenerate bone defects using scaffolds and cells.
  • Current biomaterials have limitations in resorbability and bone formation, leading to poor vascularization.
  • Mesenchymal Stem Cells (MSC) are crucial for osteogenesis and tissue regeneration.

Purpose of the Study:

  • To investigate in vivo bone formation within porous ceramic scaffolds using advanced X-ray Synchrotron radiation techniques.
  • To elucidate the dynamic processes of biomineralization and vascularization during bone regeneration.
  • To provide a comprehensive overview of Synchrotron-based methods for bone tissue engineering.

Main Methods:

  • Utilized X-ray Synchrotron radiation-based techniques, specifically micro-tomography and micro-diffraction.
  • Implanted Mesenchymal Stem Cell (MSC)-seeded ceramic scaffolds in a mouse model for in vivo studies.
  • Combined micro X-ray diffraction with X-ray phase-contrast imaging for high-resolution analysis.

Main Results:

  • Detailed structural and morphological changes during new bone deposition, biomineralization, and vascularization were observed.
  • Identified the formation of an organic collagenous matrix followed by amorphous mineral precursor crystallization.
  • Demonstrated the capability of Synchrotron techniques to probe heterogeneous bone tissue at micro- to nano-scales.

Conclusions:

  • Advanced Synchrotron radiation techniques offer unprecedented insights into bone formation dynamics.
  • These methods are vital for understanding biomineralization, vascularization, and material-tissue interactions.
  • The described imaging technologies hold potential for clinical translation in bone regeneration therapies.