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Related Concept Videos

Quality Assurance01:19

Quality Assurance

Quality assurance is the overarching term used to describe the activities employed to ensure the proper performance of a system. These activities can be classified into three categories: quality control, quality assessment, and internal corrective measures. Typically, these activities work cyclically: quality control is performed before and during the analysis, while quality assessment occurs during and after the investigation. Internal corrective measures are implemented based on the findings...
Quality Control01:05

Quality Control

Quality control is one of the three cyclical quality assurance activities that help keep a system under statistical control. Typical quality control activities include creating quality control charts, conducting proficiency testing, and documenting and archiving results.
Quality control helps track data, visualize trends, and identify variations, making it easier to detect deviations that may affect the accuracy of an analysis. One way to do this is by generating a quality control chart, which...
Quality of Water01:19

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
Detection of Gross Error: The Q Test01:00

Detection of Gross Error: The Q Test

When one or more data points appear far from the rest of the data, there is a need to determine whether they are outliers and whether they should be eliminated from the data set to ensure an accurate representation of the measured value. In many cases, outliers arise from gross errors (or human errors) and do not accurately reflect the underlying phenomenon. In some cases, however, these apparent outliers reflect true phenomenological differences. In these cases, we can use statistical methods...
Qualitative Analysis03:46

Qualitative Analysis

For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
Qualitative Analysis01:10

Qualitative Analysis

Qualitative analysis is the process of identifying elements, ions, or compounds in an unknown sample. It is the first and most fundamental type of analysis based on the hierarchy of analytical goals. This hierarchy is significant as it provides a structured approach to scientific research, with qualitative analysis serving as the initial step, providing essential information before moving on to quantitative or other forms of analysis.
There are two main approaches to qualitative analysis:...

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Related Experiment Video

Updated: Jun 20, 2026

Using Visual and Narrative Methods to Achieve Fair Process in Clinical Care
14:32

Using Visual and Narrative Methods to Achieve Fair Process in Clinical Care

Published on: February 16, 2011

A question of quality.

Fábio de Castro

    Revista Brasileira De Cirurgia Cardiovascular : Orgao Oficial Da Sociedade Brasileira De Cirurgia Cardiovascular
    |September 22, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Brazilian scientific journals are gaining visibility in a major global database due to high-quality national research. This increase reflects research quality, not necessarily a rise in publication volume.

    Related Experiment Videos

    Last Updated: Jun 20, 2026

    Using Visual and Narrative Methods to Achieve Fair Process in Clinical Care
    14:32

    Using Visual and Narrative Methods to Achieve Fair Process in Clinical Care

    Published on: February 16, 2011

    Area of Science:

    • Bibliometrics
    • Scientific Publishing
    • Latin American Research

    Background:

    • Brazilian scientific journals have historically faced challenges in global indexing.
    • International databases are crucial for research dissemination and impact.

    Purpose of the Study:

    • To analyze the presence of Brazilian scientific journals in a prominent global database.
    • To understand the factors contributing to their increased visibility.

    Main Methods:

    • Analysis of journal indexing in a major international scientific database.
    • Expert interviews to interpret trends in scientific publishing.

    Main Results:

    • Brazilian scientific journals are increasingly being indexed in a leading global database.
    • This expansion is attributed to the enhanced quality of Brazilian scientific research.

    Conclusions:

    • The enhanced quality of Brazilian research is driving its inclusion in major international databases.
    • Increased indexing signifies improved research output quality rather than a simple increase in production volume.