Near Field Signal
Near Field Signal - Related Videos
10:33
Local Field Fluorescence Microscopy: Imaging Cellular Signals in Intact Hearts
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Cited by 8 •
2017
In the heart, molecular events coordinate the electrical and contractile function of the organ. A set of local field fluorescence microscopy techniques presented here enables the recording of cellular variables in intact hearts. Identifying mechanisms defining the cardiac function is critical in understanding how the heart works under pathological situations.
06:50
Wide-Field, Real-Time Imaging of Local and Systemic Wound Signals in Arabidopsis
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Cited by 7 •
2021
Extracellular glutamate-triggered systemic calcium signaling is critical for the induction of plant defense responses to mechanical wounding and herbivore attack in plants. This article describes a method to visualize the spatial and temporal dynamics of both these factors using Arabidopsis thaliana plants expressing calcium- and glutamate-sensitive fluorescent biosensors.
10:23
Electric Fields
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN An electric field is generated by a charged object (referred to as the source charge) in the space around it, and represents the ability to exert electric force on another charged object (referred to as the test charge). Represented by a vector at any given point in the space, the electric field is the electrical force per unit test charge placed at that point (the force...
10:04
Magnetic Fields
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Magnetic fields can be generated by moving charges, such as an electrical current. The magnetic field generated by a current can be calculated from the Maxwell equation. In addition, magnetic objects such as bar magnets can also generate magnetic fields due to microscopic dynamics of charges inside the material. Magnetic fields will exert magnetic force on other moving...
07:33
Microbial DNA Analysis in the Field Using a Biological Extraction Field Kit and a Field qPCR Unit
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2026
Reliable and accurate forms of field-deployable DNA analysis are crucial for many industries. This paper offers two methods for environmental microbial analysis in the field: 1) the isolation of microbial DNA from environmental samples using a biological extraction field kit, and 2) the analysis of DNA via the field qPCR unit.
FAQs
Two mechanisms create the local range. A signaling cell can release a soluble factor whose diffusion remains limited, or a membrane-bound molecule can interact with a receptor on a directly contacting cell. These routes differ in delivery, but both translate neighbor-to-neighbor information into intracellular signaling.
Spatial restriction changes which cells receive the message. Because the soluble cue diffuses only a limited distance, nearby cells can respond while more distant targets remain unaffected. Direct membrane contact narrows the interaction further to adjacent cells. This spatial selectivity allows tissues to coordinate local behavior without producing a body-wide response.
Receptor binding activates intracellular pathways that carry the local signal into the receiving cell. Those pathways can alter gene expression or change cell behavior, linking an external cue to a biological response. The outcome therefore depends not only on the signal's location, but also on how the recipient cell processes receptor engagement.
A useful analysis follows the signal from its source to its nearby target. Researchers can distinguish whether communication uses a diffusible soluble factor or direct membrane contact, then examine receptor binding, intracellular pathway activation, and resulting changes in gene expression or cell behavior. This sequence connects spatial proximity with a measurable cellular outcome.
During development and tissue repair, local cues help neighboring cells coordinate their behavior in the correct tissue context. Because the information remains spatially restricted, cells can receive instructions that organize nearby events without affecting distant regions. This property supports the ordered changes needed to shape tissues and restore their local organization.
Local communication helps immune responses remain coordinated among nearby cells and supports the maintenance of tissue microenvironments. Studying these signals can show how surrounding cells influence one another through restricted information exchange. That perspective is useful for understanding cell communication, examining disease mechanisms, and informing tissue-engineering research.