Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Feedback Loops

Feedback Loops

In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.

Review and Preview

Review and Preview

In statistics, several tools are used to interpret the data. Measures of central tendency represent the characteristics of the data, such as mean, median, and mode. Additionally, measures of variance like standard deviation and range are used to find the spread of data from the mean. Relative standing measures the distance between data locations. Commonly used measures of relative standings are percentile, z score, and quartiles.
Percentiles are a type of fractile that partition data into...

Reaction Quotient

Reaction Quotient

The status of a reversible reaction is conveniently assessed by evaluating its reaction quotient (Q). For a reversible reaction described by m A + n B ⇌ x C + y D, the reaction quotient is derived directly from the stoichiometry of the balanced equation as

Responses to Gravity and Touch

Responses to Gravity and Touch

Gravitropism: Plant Responses to Gravity

Reaction Mechanisms

Reaction Mechanisms

Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs.
For instance, the decomposition of ozone appears to follow a mechanism with two steps:

Reaction Rate

Reaction Rate

The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure.
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...

You might also read

Related Articles

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

Sort by

Same authorSame journal

First Trimester Screening for Preterm Preeclampsia in the United Kingdom: A Cost-Effectiveness Analysis.

BJOG : an international journal of obstetrics and gynaecology·2026

Same author

Terminal Digit Preference and Threshold Avoidance in Digital Blood Pressure Measurements During Pregnancy: Secondary Analysis of Data From the CLIP and PRECISE Cohorts.

JMIR mHealth and uHealth·2026

Same author

Developing the evidence and associated service models to improve pain management in older people living with frailty: a synopsis of the POPPY mixed method, co-design study.

Health and social care delivery research·2026

Same author

Pre-eclampsia risk-stratified planned birth at term: A survey of women's perspectives on acceptability and risk communication.

Acta obstetricia et gynecologica Scandinavica·2026

Same author

Healthcare professionals' perceptions of the acceptability of the PREVENT-PE trial: A mixed-methods survey and interview study.

Acta obstetricia et gynecologica Scandinavica·2026

Same author

Concordance between target trial emulation and randomised controlled trials: systematic review and meta-analysis.

BMJ (Clinical research ed.)·2026

Same journal

Impact of a Structured Caesarean Reduction Strategy on Perinatal Outcomes: A Retrospective Ecological Time-Trend Study.

BJOG : an international journal of obstetrics and gynaecology·2026

Same journal

Long-Term Outcomes After Retropubic and Transobturator Sling Procedures: Reoperation for Recurrent Stress Urinary Incontinence.

BJOG : an international journal of obstetrics and gynaecology·2026

Same journal

Correction to "The Management of Nausea and Vomiting in Pregnancy and Hyperemesis Gravidarum (Green-Top Guideline No. 69)".

BJOG : an international journal of obstetrics and gynaecology·2026

Same journal

Large Language Models on European Guidelines for Cervical Cancer: Implications of Design and Clinical Applicability.

BJOG : an international journal of obstetrics and gynaecology·2026

Same journal

Internal Consistency of the Hadlock Estimated Fetal Weight Reference: Methodological Analysis.

BJOG : an international journal of obstetrics and gynaecology·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 29, 2025

Author Spotlight: Exploring Light-Driven Chemical Reactions and Energy-Harnessing Devices in Photochemical Research

Author Spotlight: Exploring Light-Driven Chemical Reactions and Energy-Harnessing Devices in Photochemical Research

Published on: February 16, 2024

Author reply

David Wright¹, Alan Wright¹, Laura A Magee²

¹Institute of Health Research, University of Exeter, Exeter, UK.

BJOG : an International Journal of Obstetrics and Gynaecology

|April 1, 2024

Summary

No abstract available in PubMed .

More Related Videos

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Published on: May 28, 2007

Author Spotlight: Advancing Facial Rejuvenation Therapy with Post-Laser Salicylic Acid Application

Author Spotlight: Advancing Facial Rejuvenation Therapy with Post-Laser Salicylic Acid Application

Published on: September 27, 2024

Related Experiment Videos

Last Updated: Jun 29, 2025

Author Spotlight: Exploring Light-Driven Chemical Reactions and Energy-Harnessing Devices in Photochemical Research

Author Spotlight: Exploring Light-Driven Chemical Reactions and Energy-Harnessing Devices in Photochemical Research

Published on: February 16, 2024

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Published on: May 28, 2007

Author Spotlight: Advancing Facial Rejuvenation Therapy with Post-Laser Salicylic Acid Application

Author Spotlight: Advancing Facial Rejuvenation Therapy with Post-Laser Salicylic Acid Application

Published on: September 27, 2024