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Related Concept Videos

Chemical Reactions01:19

Chemical Reactions

A chemical reaction is a process by which the bonds in the atoms of substances are rearranged to generate new substances. Matter cannot be created or destroyed in a chemical reaction—the same type and number of atoms that make up the reactants are still present in the products. Merely, the rearrangement of chemical bonds produces new compounds.
Chemical Reactions Rearrange Atoms into New Substances
A chemical reaction takes starting materials—the reactants—and changes them into different...
Chemical Reactions in Aqueous Solutions03:03

Chemical Reactions in Aqueous Solutions

Chemical substances interact in many different ways. Certain chemical reactions exhibit common patterns of reactivity. Due to the vast number of chemical reactions, it becomes necessary to classify them based on the observed patterns of interaction.
Chemical Reactions02:26

Chemical Reactions

A balanced chemical equation provides the information of chemical formulas of the reactants and products involved in the chemical change. A reaction’s stoichiometry helps predict how much of the reactant is needed to produce the desired amount of product, or in some cases, how much product will be formed from a specific amount of the reactant.
The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts. However, in...
Coupled Reactions01:17

Coupled Reactions

Cellular processes such as building and breaking down complex molecules occur through stepwise chemical reactions. Some of these chemical reactions are spontaneous and release energy, whereas others require energy to proceed. Cells often couple the energy-releasing reaction with the energy-requiring one to carry out important cell functions. 
Energy in adenosine triphosphate or ATP molecules is easily accessible to do work. ATP powers the majority of energy-requiring cellular reactions. Cells...
Introduction to Chemical Reactions01:23

Introduction to Chemical Reactions

All chemical reactions begin with a reactant, the general term for one or more substances entering the reaction. Sodium and chloride ions, for example, are the reactants in the production of table salt. One or more substances produced by a chemical reaction are called the product. Chemical reactions follow the law of conservation of mass, which means that matter cannot be created nor destroyed in a chemical reaction. The components of the reactants—the number of atoms and the elements—are all...
Effects of Chemicals: Overview01:27

Effects of Chemicals: Overview

Drugs, encompassing various chemical compounds from natural sources, lab synthesis, or genetic engineering, elicit different biological responses in living organisms. Some of these responses are desirable or therapeutic, while others are undesirable. The primary goal of administering a drug is to achieve a therapeutic effect, that is, to address a specific disease or health condition. Any concurrent effects outside of this therapeutic outcome are considered undesirable. These undesirable...

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Related Experiment Video

Updated: May 21, 2026

A Web Tool for Generating High Quality Machine-readable Biological Pathways
08:01

A Web Tool for Generating High Quality Machine-readable Biological Pathways

Published on: February 8, 2017

Heron: Visualizing and Controlling Chemical Reaction Explorations and Networks.

Charlotte H Müller1, Miguel Steiner1, Jan P Unsleber1

  • 1Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland.

The Journal of Physical Chemistry. A
|October 3, 2024
PubMed
Summary
This summary is machine-generated.

Heron is a new graphical user interface for managing complex quantum chemical calculations. It enables intuitive human-machine interaction for exploring molecular structure and reactivity in chemical reaction networks.

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Area of Science:

  • Computational Chemistry
  • Chemical Informatics

Background:

  • Automated and high-throughput quantum chemical investigations generate complex data.
  • Efficient interaction and control are needed for virtual experiments.

Purpose of the Study:

  • Introduce Heron, a graphical user interface (GUI) for human-machine interaction in quantum chemical exploration.
  • Facilitate advanced interactions with molecular structure and reactivity studies.

Main Methods:

  • Developed Heron GUI for interactive and automated chemical reaction explorations.
  • Integrated standard electronic structure modules, haptic force feedback, and microkinetic modeling.
  • Included automated data refinement with correlated calculations and complete active space calculations.

Main Results:

  • Heron provides access to advanced workflows for exploring vast chemical reaction networks.
  • Demonstrated interoperability of modules for complex computational chemistry tasks.
  • Enabled low-entrance-barrier access to advanced modeling techniques.

Conclusions:

  • Heron enhances human-machine interaction for quantum chemical exploration campaigns.
  • Facilitates efficient analysis of complex chemical reaction networks.
  • Promotes routine use of advanced computational chemistry methods.