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  2. Four-terminal sensing - Wikipedia

    en.wikipedia.org/wiki/Four-terminal_sensing

    Four-point measurement of resistance between voltage sense connections 2 and 3. Current is supplied via force connections 1 and 4. In electrical engineering, four-terminal sensing (4T sensing), 4-wire sensing, or 4-point probes method is an electrical impedance measuring technique that uses separate pairs of current-carrying and voltage-sensing electrodes to make more accurate measurements ...

  3. Plant perception (physiology) - Wikipedia

    en.wikipedia.org/wiki/Plant_perception_(physiology)

    Plant perception is the ability of plants to sense and respond to the environment by adjusting their morphology and physiology. [1] Botanical research has revealed that plants are capable of reacting to a broad range of stimuli, including chemicals, gravity, light, moisture, infections, temperature, oxygen and carbon dioxide concentrations, parasite infestation, disease, physical disruption ...

  4. Light-harvesting complexes of green plants - Wikipedia

    en.wikipedia.org/wiki/Light-harvesting_complexes...

    The light-harvesting complex (or antenna complex; LH or LHC) is an array of protein and chlorophyll molecules embedded in the thylakoid membrane of plants and cyanobacteria, which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem. The antenna pigments are predominantly chlorophyll b, xanthophylls, and ...

  5. Instrumentation in petrochemical industries - Wikipedia

    en.wikipedia.org/wiki/Instrumentation_in...

    Instrumentation comprises sensor elements, signal transmitters, controllers, indicators and alarms, actuated valves, logic circuits and operator interfaces. An outline of key instrumentation is shown on Process Flow Diagrams (PFD) which indicate the principal equipment and the flow of fluids in the plant.

  6. Two-component regulatory system - Wikipedia

    en.wikipedia.org/.../Two-component_regulatory_system

    The KdpD sensor kinase proteins regulate the kdpFABC operon responsible for potassium transport in bacteria including E. coli and Clostridium acetobutylicum. [20] The N-terminal domain of this protein forms part of the cytoplasmic region of the protein, which may be the sensor domain responsible for sensing turgor pressure. [21]

  7. Phytochrome - Wikipedia

    en.wikipedia.org/wiki/Phytochrome

    Domain arrangements in plant, bacterial and fungal phytochromes are comparable, insofar as the three N-terminal domains are always PAS, GAF and PHY domains. However C-terminal domains are more divergent. The PAS domain serves as a signal sensor and the GAF domain is responsible for binding to cGMP and also senses light signals.

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  9. Root cap - Wikipedia

    en.wikipedia.org/wiki/Root_cap

    Lateral part of the tip 4. Dead cells 5. Elongation zone. The root cap is a type of tissue at the tip of a plant root. [1] It is also called calyptra. Root caps contain statocytes which are involved in gravity perception in plants. [1] If the cap is carefully removed the root will grow randomly. The root cap protects the growing tip in plants. [1]

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