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Videos de Conceptos Relacionados

The Scientific Method01:32

The Scientific Method

The scientific method is a detailed, empirical problem-solving process used by biologists and other scientists. This iterative approach involves formulating a question based on observation, developing a testable potential explanation for the observation (called a hypothesis), making and testing predictions based on the hypothesis, and using the findings to create new hypotheses and predictions.Generally, predictions are tested using carefully-designed experiments. Based on the outcome of these...
Free Energy01:21

Free Energy

Free energy—abbreviated as G for the scientist Gibbs who discovered it—is a measurement of useful energy that can be extracted from a reaction to do work. It is the energy in a chemical reaction that is available after entropy is accounted for. Reactions that take in energy are considered endergonic and reactions that release energy are exergonic. Plants carry out endergonic reactions by taking in sunlight and carbon dioxide to produce glucose and oxygen. Animals, in turn, break down the...
In-vitro Mutagenesis01:16

In-vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
Speciation Rates01:07

Speciation Rates

Speciation can proceed at markedly different rates, and evolutionary biologists commonly describe these differences through the models of gradualism and punctuated equilibrium. Both patterns explain how new species arise, but they differ in the tempo and continuity of evolutionary change. In both cases, evolutionary change arises from heritable variation within populations, with natural selection often shaping traits that improve survival and reproduction under specific environmental conditions.
Keystone Species01:39

Keystone Species

Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a pivotal role in the...
The Scientific Method02:40

The Scientific Method

Research is what makes the difference between facts and opinions. Facts are observable realities, and opinions are personal judgments, conclusions, or attitudes that may or may not be accurate. In the scientific community, facts can be established only using evidence collected through empirical research.

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Small and Wide Angle X-Ray Scattering Studies of Biological Macromolecules in Solution
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    Área de la Ciencia:

    • Investigaciones científicas generales
    • Ciencias interdisciplinarias
    • Descubrimientos científicos

    Sus antecedentes:

    • La familia de revistas Science es una de las principales editoriales de investigación de alto impacto.
    • La difusión de los hallazgos científicos de vanguardia es crucial para el progreso mundial.
    • Esto pone de relieve las contribuciones significativas recientes a diversas disciplinas científicas.

    Objetivo del estudio:

    • Para mostrar la investigación clave en todo el espectro científico.
    • Proporcionar una visión concisa de los principales avances.
    • Informar a una audiencia diversa acerca de los descubrimientos científicos de impacto.

    Principales métodos:

    • Selección de estudios seleccionados de la familia de revistas Science.
    • Se hace hincapié en la investigación con amplias implicaciones.
    • Centrarse en la novedad y el significado.

    Principales resultados:

    • Presentación de varios logros científicos.
    • Ilustra la amplitud de la investigación científica actual.
    • Demuestra un progreso significativo en muchos campos.

    Conclusiones:

    • La familia de revistas Science continúa siendo una fuente vital de investigación innovadora.
    • Estos aspectos destacados subrayan la naturaleza dinámica de la exploración científica.
    • La difusión continua de dicha investigación es esencial para la innovación futura.