Related Experiment Video
Updated: Jul 7, 2026

08:49
Self-Assembly of Microtubule Tactoids
Published on: June 23, 2022
A fresh look at natural tropolonoids
1Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.
Natural Product Reports
|February 6, 2008
Summary
Natural tropones and tropolones are increasingly studied, with about 200 known compounds. This review covers their natural distribution, synthesis, and biological effects.
Area of Science:
- Natural product chemistry
- Organic chemistry
- Biochemistry
Background:
- Tropones and tropolones are a class of natural products with growing scientific interest.
- Approximately 200 distinct tropones and tropolones have been identified in nature.
- These compounds exhibit diverse chemical structures and biological functions.
Purpose of the Study:
- To provide a comprehensive review of naturally occurring tropones and tropolones.
- To elucidate the distribution of these compounds across different natural sources.
- To summarize the known biosynthetic pathways and biological activities of tropones and tropolones.
Main Methods:
- Literature review of scientific publications.
- Compilation of data on natural product occurrence.
- Synthesis of information on biosynthetic routes.
- Summary of reported biological activities.
Main Results:
- Detailed overview of the natural distribution of approximately 200 tropones and tropolones.
- Explanation of key biosynthetic pathways involved in their formation.
- Catalog of diverse biological activities associated with these compounds.
Conclusions:
- Tropones and tropolones represent a significant class of natural products with broad distribution.
- Understanding their biosynthesis and biological activities is crucial for further research.
- This review serves as a valuable resource for chemists and biologists interested in these compounds.
Related Concept Videos
Trophic Efficiency
Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
Trophic Levels
All organisms in an ecosystem occupy a trophic level in the food chain. The lowest level consists of primary producers, which synthesize their food from either solar or chemical energy. Each subsequent level obtains energy from the levels below. Detritivores can occupy any of the levels above primary producers.
Total Internal Reflection Fluorescence Microscopy
Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
Electron Microscope Tomography and Single-particle Reconstruction
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Torsion of Noncircular Members
Circular shafts undergoing torsional stress maintain their cross-sectional integrity due to their axisymmetric nature. This symmetry ensures an even distribution of stress, allowing the shaft to withstand torsion without distorting. In contrast, square bars, lacking this axial symmetry, experience significant distortion across their cross-sections when subjected to torsion, with the exception of along their diagonals and at lines connecting midpoints. A detailed examination of a cubic element...
Torsional Pendulum
A torsional pendulum involves the oscillation of a rigid body in which the restoring force is provided by the torsion in the string from which the rigid body is suspended. Ideally, the string should be massless; practically, its mass is much smaller than the rigid body's mass and is neglected.
As long as the rigid body's angular displacement is small, its oscillation can be modeled as a linear angular oscillation. The amplitude of the oscillation is an angle. The role of mass is played by the...
As long as the rigid body's angular displacement is small, its oscillation can be modeled as a linear angular oscillation. The amplitude of the oscillation is an angle. The role of mass is played by the...

