Biological Elements
Biological Elements - Related Videos
11:17
Fundamental Technical Elements of Freeze-fracture/Freeze-etch in Biological Electron Microscopy
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Cited by 6 •
2014
Basic techniques and refinements of freeze-fracture processing of biological specimens and nanomaterials for examination by transmission electron microscopy are described. This technique is a preferred method for revealing ultrastructural features and specializations of biological membranes and for obtaining ultrastructural level dimensional and spatial data in materials sciences and nanotechnology products.
04:00
Periodic Classification of the Elements
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2020
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...
02:54
Classification of Elements and Compounds
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2020
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. Compounds are pure substances composed of two or more elements in fixed, definite proportions. Compounds are classified as ionic or molecular (covalent) based on the bonds...
02:31
Elements: Chemical Symbols and Isotopes
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2020
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). Some symbols are derived from the common English name of the element; others are abbreviations of the name in another language — Latin, Greek or German. For example, the symbol for aluminum (common name)...
01:27
Elements and Compounds
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2026
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.ElementsElements 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...
FAQs
These elements support distinct but connected cellular roles. Carbon forms versatile molecular frameworks, while hydrogen and oxygen influence water balance. Nitrogen contributes to proteins and nucleic acids, phosphorus supports nucleic acids and energy transfer, and sulfur contributes to proteins and membrane structure. Their combined availability allows cells to maintain coordinated biochemical functions rather than relying on one element alone.
Carbon provides versatile molecular frameworks that can support the construction of many biomolecules. This structural flexibility helps organize the chemical components required for cellular functions, while other elements add specialized roles such as energy transfer, water balance, or formation of proteins and nucleic acids. Carbon therefore serves as a central framework within the broader elemental organization of living systems.
Organisms acquire and transform biological elements through metabolism, while biogeochemical cycles connect those transformations with environmental processes. This movement links cellular activity to nutrient availability beyond the organism. Studying these connections helps explain how changes in elemental supply can influence both cellular homeostasis and larger ecological systems, including the distribution and cycling of nutrients.
Elemental imbalances can affect health, cellular homeostasis, and environmental processes. At the cellular level, insufficient or excessive availability may disrupt the coordinated functions supported by biomolecules and metabolism. At broader scales, altered nutrient availability can shape ecosystems. Examining these effects helps connect molecular changes with organismal health and ecological consequences without treating either level in isolation.
In nutrition and medicine, studying these elements helps relate elemental availability to health and cellular function. Their roles in proteins, nucleic acids, membranes, water balance, and energy transfer provide a basis for interpreting how imbalances may affect organisms. This knowledge supports investigation of health-related consequences while connecting nutritional conditions with underlying biological processes.
Elemental availability shapes ecosystems because organisms depend on acquiring and transforming chemical components, and those components move through biogeochemical cycles. Changes in availability can influence environmental processes and the functioning of living communities. This perspective allows ecology to connect cellular metabolism with nutrient patterns across ecosystems, showing why biological elements matter beyond individual organisms.