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Related Concept Videos

Elements and Compounds01:27

Elements and Compounds

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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
Elements are classified as atomic or molecular based on the nature of their basic units. They are unique forms of matter with specific chemical and physical properties that cannot break down into smaller substances by ordinary chemical reactions. There...
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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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Classification of Elements and Compounds02:54

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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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Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
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A chemical symbol is an abbreviation used to indicate an element or an atom of an element. For example, the symbol for mercury is Hg. The same symbol is used to indicate one atom of mercury (microscopic domain) or to label a container of many atoms of the element mercury (macroscopic domain).
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Quantitative Comparison of cis-Regulatory Element CRE Activities in Transgenic Drosophila melanogaster
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Damage-responsive elements in Drosophila regeneration.

Elena Vizcaya-Molina1, Cecilia C Klein1,2, Florenci Serras1

  • 1Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia and Institut de Biomedicina (IBUB), Universitat de Barcelona, Barcelona 08028, Catalonia, Spain.

Genome Research
|November 22, 2018
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Summary
This summary is machine-generated.

Scientists discovered how gene expression changes trigger regeneration in Drosophila imaginal discs. Key regulatory elements and transcription factors coordinate tissue repair after injury, offering insights into regenerative biology.

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Area of Science:

  • Regenerative Biology
  • Developmental Biology
  • Genomics

Background:

  • Understanding gene expression changes is crucial for regenerative biology.
  • Tissue regeneration relies on coordinated genomic region activity and DNA-binding proteins.
  • Drosophila imaginal discs possess high regenerative capacity after induced cell death.

Purpose of the Study:

  • To identify regulatory elements controlling tissue recovery in Drosophila imaginal discs.
  • To understand the mechanisms of gene expression resetting during injury response.

Main Methods:

  • Genome-wide approaches were used to interrogate chromatin function.
  • Analysis focused on Drosophila imaginal discs with genetically induced cell death.

Main Results:

  • Global coregulation of gene expression occurs during regeneration.
  • A regeneration program is driven by diverse regulatory elements, including novel, co-opted, and injury-activated enhancers.
  • These enhancers contain binding sites for conserved transcription factors essential for regeneration.

Conclusions:

  • Specific enhancers and conserved transcription factors orchestrate gene expression for tissue repair.
  • The findings provide a framework for understanding metazoan regeneration mechanisms.