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Periodic Classification of the Elements04:00

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The periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table, a periodic recurrence of similar electron configurations in the outer shells of these elements is observed. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom...
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Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond. Elements are classified as atomic or molecular based on the nature of their basic units.
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Acupuncture in a Rat Model of Asthma
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Association between trace elements levels and asthma susceptibility.

Song Mao1, Liangxia Wu1, Wenjing Shi1

  • 1Department of Pediatrics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.

Respiratory Medicine
|December 5, 2018
PubMed
Summary
This summary is machine-generated.

Trace element levels, specifically copper, magnesium, and iron, may indicate asthma risk in certain populations. Further research is needed to confirm the role of these elements in asthma pathogenesis.

Keywords:
AsthmaCopperIronLevelsMagnesiumSeleniumZinc

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Area of Science:

  • * Environmental health
  • * Clinical biochemistry
  • * Respiratory medicine

Background:

  • * Trace element dysregulation is implicated in asthma pathogenesis.
  • * Specific alterations in trace element levels in asthma patients require clarification.

Purpose of the Study:

  • * To investigate the association between trace element levels and asthma susceptibility.
  • * To conduct a pooled analysis of existing case-control studies.

Main Methods:

  • * Systematic review and meta-analysis of 34 case-control studies.
  • * Extraction of standard mean differences (SMDs) and 95% confidence intervals (CIs).
  • * Pooled analysis to determine the significance of trace element level differences.

Main Results:

  • * Significant differences in copper (Cu) levels observed in overall and Asian populations.
  • * Significant differences in magnesium (Mg) levels noted among Asians.
  • * Significant differences in iron (Fe) levels found in overall and Asian populations.
  • * No significant differences in selenium (Se) or zinc (Zn) levels were consistently observed across populations.

Conclusions:

  • * Elevated copper, magnesium, and iron levels may serve as potential biomarkers for asthma risk in specific ethnic groups.
  • * Further research is warranted to elucidate the definitive role and clinical significance of these trace elements in asthma.