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Related Concept Videos

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...
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.
Half-life of a Reaction02:42

Half-life of a Reaction

The half-life of a reaction (t1/2) is the time required for one-half of a given amount of reactant to be consumed. In each succeeding half-life, half of the remaining concentration of the reactant is consumed. For example, during the decomposition of hydrogen peroxide, during the first half-life (from 0.00 hours to 6.00 hours), the concentration of H2O2 decreases from 1.000 M to 0.500 M. During the second half-life (from 6.00 hours to 12.00 hours), the concentration decreases from 0.500 M to...
Inductive Effects on Chemical Shift: Overview01:27

Inductive Effects on Chemical Shift: Overview

The protons in unsubstituted alkanes are strongly shielded with chemical shifts below 1.8 ppm. Methine, methylene, and methyl protons appear at approximately 1.7, 1.2 and 0.7 ppm, while the proton signal from methane appears at 0.23 ppm. An electronegative substituent, such as chlorine, withdraws the electron density from the protons, increasing their chemical shift. Progressive substitution of the hydrogens in methane by chlorine shifts the proton signals increasingly downfield, to 3.05 ppm in...
Five-Membered Heterocyclic Aromatic Compounds: Overview01:13

Five-Membered Heterocyclic Aromatic Compounds: Overview

Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom, respectively.
Data Collection by Experiments01:13

Data Collection by Experiments

Data collection is a systematic method of obtaining, observing, measuring, and analyzing accurate information. An experimental study is a standard method of data collection that involves the manipulation of the samples by applying some form of treatment prior to data collection. It refers to manipulating one variable to determine its changes on another variable. The sample subjected to treatment is known as “experimental units.”
An example of the experimental method is a public clinical trial...

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

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Albert Charles Chibnall: 28 January 1894-10 January 1988.

Biographical memoirs of fellows of the Royal Society. Royal Society (Great Britain)·1990
Same author

Bound quinic acid as a measure of coupling of leaf and sunflower-seed proteins with chlorogenic acid congeners: loss of availability of lysine.

Journal of the science of food and agriculture·1978
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The problem of assessing the safety of novel protein-rich foods.

The Proceedings of the Nutrition Society·1977
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A simplified procedure for fractionating plant materials.

Journal of the science of food and agriculture·1976
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Permethylation for mass spectrometry: rearrangements of ester linkages and use of potassium t-butoxide.

Biomedical mass spectrometry·1974
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Notes on a deamination method proposed for determining "chemically available lysine" of proteins.

The British journal of nutrition·1973

Related Experiment Video

Updated: Jul 26, 2026

Comparing Bibliometric Analysis Using PubMed, Scopus, and Web of Science Databases
05:02

Comparing Bibliometric Analysis Using PubMed, Scopus, and Web of Science Databases

Published on: October 24, 2019

25 years of Science Citation Index--some experiences.

R L Synge

    Journal of Chemical Information and Computer Sciences
    |February 1, 1990
    PubMed
    Summary

    Science Citation Index (SCI) provides access to relevant scientific documents, but its coverage can be patchy. Careful author referencing is crucial for improving SCI

    Area of Science:

    • Bibliometrics
    • Information Science
    • Scientific Communication

    Background:

    • The Science Citation Index (SCI) relies on author citations for its intellectual content.
    • Citation practices can lead to variable and sometimes incomplete document retrieval.
    • This study examines the effectiveness of SCI in accessing scientific literature through case studies.

    Observation:

    • Two distinct citation families were analyzed to compare SCI retrieval with other search methods.
    • The first family, focusing on ascorbic acid derivatives, showed high overlap with CAS ONLINE substructure searches, indicating careful organic chemistry referencing.
    • The second family, concerning amino acid residues in soil organic matter, demonstrated poor overlap with Chemical Abstracts Boolean searches, partly due to language barriers.

    Findings:

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    Last Updated: Jul 26, 2026

    Comparing Bibliometric Analysis Using PubMed, Scopus, and Web of Science Databases
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    Comparing Bibliometric Analysis Using PubMed, Scopus, and Web of Science Databases

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    Global and Current Research Trends of Single-Cell Sequencing in Cancer: A Bibliometric and Visualization Study

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    • SCI's retrieval effectiveness varies significantly depending on the scientific discipline and referencing practices.
    • Organic chemistry literature is well-represented due to meticulous author citations.
    • Retrieval for soil organic matter research is less comprehensive, highlighting limitations in SCI's scope and potential language barriers.

    Implications:

    • SCI serves as a valuable complement to other databases but is not a complete substitute.
    • Enhancing SCI's utility requires broader journal coverage and, more importantly, improved referencing habits in primary publications.
    • Future improvements in scientific information retrieval depend on authors' commitment to thorough citation practices.