Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

1.9K
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
1.9K
Effects of EDTA on End-Point Detection Methods01:18

Effects of EDTA on End-Point Detection Methods

666
Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
666
Quality Control01:05

Quality Control

2.6K
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...
2.6K
Quality Assurance01:19

Quality Assurance

2.3K
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...
2.3K
Quality of Water01:19

Quality of Water

568
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...
568
Pulse amplitude and quality01:17

Pulse amplitude and quality

3.2K
Pulse amplitude is a crucial indicator of cardiac health because it provides valuable insights into the strength of left ventricular contractions and the overall uniformity of blood circulation within the vasculature. The strength of the pulse is directly related to the force with which the heart contracts and the volume of blood being pumped.
A weak or absent pulse may indicate reduced cardiac output or poor left ventricular contraction, which can be signs of cardiovascular dysfunction or...
3.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Bioreactor Technology for Medicinal Plant In Vitro Cultures: Systems, Applications, and Future Perspectives.

BiologyĀ·2026
Same author

Morphology-engineered NiFe@C nanocages boosting electrochemical quantification of ractopamine in meat samples.

Food chemistryĀ·2026
Same author

High-Mobility Carrier Diffusion Visualization and Dynamic Engineering in Bi<sub>2</sub>O<sub>2</sub>Se Nanoplates.

The journal of physical chemistry lettersĀ·2026
Same author

Shikonin sensitises osimertinib-resistant lung adenocarcinoma to ferroptosis through HES1-mediated ATF3 upregulation.

Acta biochimica et biophysica SinicaĀ·2026
Same author

Exercise Promotes Glutamate Transporter-Mediated Glutamate Uptake in the Striatum to Regulate MSN Plasticity and Alleviate Behavioral and Functional Impairments in PD Rats.

The journals of gerontology. Series A, Biological sciences and medical sciencesĀ·2026
Same author

Treadmill exercise rescues motor deficits in parkinsonian mice by modulating striatal D2-MSN activity: evidence from calcium imaging and chemogenetics.

Frontiers in systems neuroscienceĀ·2026

Related Experiment Video

Updated: Feb 5, 2026

A Simple and Effective Method to Consistently Isolate Mouse Cardiomyocytes
06:25

A Simple and Effective Method to Consistently Isolate Mouse Cardiomyocytes

Published on: November 11, 2022

4.0K

An effective quantitative fingerprint method for evaluating the quality consistency of

Xianduo Sun, Xiaomin Tang, Quan Yang

    Die Pharmazie
    |September 19, 2018
    PubMed
    Summary

    A novel HPLC method using systematic quantitative fingerprint analysis (SQFM) ensures Desmodium styracifolium quality. This technique correlates herb constituents with antioxidant effects, confirming Guangdong

    More Related Videos

    HPLC Coupled with Chemical Fingerprinting for Multi-Pattern Recognition for Identifying the Authenticity of Clematidis Armandii Caulis
    07:29

    HPLC Coupled with Chemical Fingerprinting for Multi-Pattern Recognition for Identifying the Authenticity of Clematidis Armandii Caulis

    Published on: November 11, 2022

    2.5K
    Application of DNA Fingerprinting using the D1S80 Locus in Lab Classes
    08:35

    Application of DNA Fingerprinting using the D1S80 Locus in Lab Classes

    Published on: July 17, 2021

    23.1K

    Related Experiment Videos

    Last Updated: Feb 5, 2026

    A Simple and Effective Method to Consistently Isolate Mouse Cardiomyocytes
    06:25

    A Simple and Effective Method to Consistently Isolate Mouse Cardiomyocytes

    Published on: November 11, 2022

    4.0K
    HPLC Coupled with Chemical Fingerprinting for Multi-Pattern Recognition for Identifying the Authenticity of Clematidis Armandii Caulis
    07:29

    HPLC Coupled with Chemical Fingerprinting for Multi-Pattern Recognition for Identifying the Authenticity of Clematidis Armandii Caulis

    Published on: November 11, 2022

    2.5K
    Application of DNA Fingerprinting using the D1S80 Locus in Lab Classes
    08:35

    Application of DNA Fingerprinting using the D1S80 Locus in Lab Classes

    Published on: July 17, 2021

    23.1K

    Area of Science:

    • Phytochemistry
    • Analytical Chemistry
    • Pharmacognosy

    Background:

    • Desmodium styracifolium is a valuable medicinal herb with significant therapeutic properties.
    • Evaluating the quality consistency of herbal medicines is crucial for ensuring efficacy and safety.
    • Traditional Chinese medicine relies on consistent quality for reliable therapeutic outcomes.

    Purpose of the Study:

    • To develop and validate a High-Performance Liquid Chromatography (HPLC) method for the simultaneous quantification of five key constituents in Desmodium styracifolium.
    • To establish a systematic quantitative fingerprint method (SQFM) for assessing the quality consistency of this herb.
    • To investigate the relationship between the chemical fingerprint and the antioxidant efficacy of Desmodium styracifolium samples.

    Main Methods:

    • HPLC analysis using an Agilent 5 TC-C18 column with gradient elution of acetonitrile and aqueous formic acid.
    • Detection at 272 nm and analysis of chromatographic data using a novel systematic quantitative fingerprint method (SQFM).
    • Correlation analysis between identified common peaks and measured antioxidant effects of the samples.

    Main Results:

    • A reliable HPLC method was established, enabling the simultaneous determination of vicenin-1, schaftoside, isoschaftoside, vicenin-3, and isovitexin.
    • The SQFM identified 39 common peaks, revealing good quality consistency among Desmodium styracifolium samples from Guangdong province.
    • Twenty-two common peaks showed a positive correlation with antioxidant activity, while others exhibited a negative correlation.

    Conclusions:

    • The developed SQFM is a reliable and efficient approach for evaluating the quality consistency of Desmodium styracifolium.
    • The method successfully links chemical profiles to biological activity, providing insights into the herb's therapeutic potential.
    • This quantitative fingerprinting technique is suitable for quality control of traditional Chinese medicines and herbal preparations.