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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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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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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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The Periodic Table and Organismal Elements00:57

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[The conceptual framework for decision making data elements in public health].

Hai-jun Wang1, Shui-gao Jin, Li-hua Liu

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This study presents a comprehensive conceptual framework for public health decision-making indicators. It details five key domains and 20 sub-domains to guide public health system analysis and improvement.

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Area of Science:

  • Public Health
  • Health Systems Research
  • Health Informatics

Context:

  • Developing effective public health strategies requires robust decision-making tools.
  • Existing frameworks may not fully capture the complexity of public health systems.
  • There is a need for a standardized approach to public health indicators.

Purpose:

  • To develop a conceptual framework for public health decision-making data elements (indicators).
  • To determine the dimensions, sub-dimensions, and interrelationships within a public health indicator framework.
  • To establish a systematic and extensible model for public health system analysis.

Summary:

  • A conceptual framework with five domains (health status, non-medical determinants, system performance, system resources, community/assurance system) and 20 sub-domains was developed.
  • The framework integrates evidence-based principles, ensuring applicability, public health relevance, and a systemic approach.
  • It describes the intricate relationships between various components of the public health system.

Impact:

  • Provides a comprehensive depiction of the public health system and its complex processes.
  • Offers a structured approach for evaluating and improving public health system performance.
  • Aligns with established quality models in healthcare, focusing on structure, process, and outcomes.