A single chemical reaction is said to be autocatalytic if one of the reaction products is also a catalyst for the same or a coupled reaction.[1]Such a reaction is called an autocatalytic reaction.
A set of chemical reactions can be said to be "collectively autocatalytic" if a number of those reactions produce, as reaction products, catalysts for enough of the other reactions that the entire set of chemical reactions is self-sustaining given an input of energy and food molecules (see autocatalytic set).
https://en.wikipedia.org/wiki/Autocatalysis
A chemical clock (or clock reaction) is a complex mixture of reacting chemical compounds in which the onset of an observable property (discoloration or coloration) occurs after a predictable induction time due to the presence of clock species at a detectable amount.[1] In cases where one of the reagents has a visible color, crossing a concentration threshold can lead to an abrupt color change after a reproducible time lapse.
https://en.wikipedia.org/wiki/Chemical_clock
Anisotropy (/ˌæn.ə-, ˌæn.aɪˈsɒtr.əp.i/) is the property of a material which allows it to change or assume different properties in different directions as opposed to isotropy. It can be defined as a difference, when measured along different axes, in a material's physical or mechanical properties (absorbance, refractive index, conductivity, tensile strength, etc.)
An example of anisotropy is light coming through a polarizer. Another is wood, which is easier to split along its grain than across it.
https://en.wikipedia.org/wiki/Anisotropy
Subcategories
This category has the following 14 subcategories, out of 14 total.
Pages in category "Scientific techniques"
The following 141 pages are in this category, out of 141 total. This list may not reflect recent changes (learn more).
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- Electron backscatter diffraction
- Electron beam-induced current
- Electron channelling contrast imaging
- Electron energy loss spectroscopy
- Electron ionization
- Electron microprobe
- Electron microscope
- Electron paramagnetic resonance
- Electrophoretic light scattering
- Energy-dispersive X-ray spectroscopy
- Environmental scanning electron microscope
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- Magic angle spinning
- Magnetic susceptibility
- Mass cytometry
- Mass spectrometry
- List of materials analysis methods
- Maximum acceptable toxicant concentration
- Mercury intrusion porosimetry
- Methods of detecting exoplanets
- Microtechnique
- Monolithic HPLC column
- Mössbauer spectroscopy
- Multiangle light scattering
- Muon spin spectroscopy
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- Sarfus
- Scanning confocal electron microscopy
- Scanning electron cryomicroscopy
- Scanning electron microscope
- Scanning joule expansion microscopy
- Scanning transmission X-ray microscopy
- Single-cell analysis
- Single-molecule FRET
- Solid-state nuclear magnetic resonance
- Spectroscopy
- Spin echo
- Spin echo small angle neutron scattering
- Spin-polarized electron energy loss spectroscopy
- Staining
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