Drawing a spark from darkness: John Walsh and electric fish.
نویسندگان
چکیده
John Walsh's research on electric fish, carried out between 1772 and 1775, proved fundamental for demonstrating that electricity might be involved in animal physiology, and, moreover, in favouring a period of great progress in both the physiology and physics of electrical phenomena. However, Walsh is hardly known to modern neuroscientists and is largely neglected by science historians also. One of the reasons for this neglect is that he never published his 'crucial experiment', that is the production of a spark from a discharge of the electric eel.
منابع مشابه
Weakly Electric Fish as Models for Underwater Robots: The Use of Active Electrolocation for the Perception of 3-Dimensional Objects in Complex Environments
Introduction Since the early 1950s it is known that so-called weakly electric fish generate electrical signals with a special electric organ in their tail (Lissmann, 1951). During each electric organ discharge (EOD) an electric field builds up around the fish (Lissmann, 1958). The animal perceives its own electric emissions with epidermal electroreceptor organs (Szabo, 1967). Each object near t...
متن کاملEffect of different photoperiods on the growth and survival of juvenile of Indian major carp, Catla catla
The experiment was conducted to determine the effects of different photoperiods and darkness on the growth and survival of juvenile Catla catla in the laboratory for 90 days. Fishes were divided into four aquaria (10 fish per aquarium), and subjected to different photoperiod regimes of 8 hours light: 16 hours dark (8L:16D), 16 hours light: 8 hours dark (16L:8D), continuous light (24L:0D) and co...
متن کاملSynthesis of Zinc/Zinc Oxide Nanoparticles by Electric Discharge Method in Distilled-Water and Argon-Gas Environments
Zinc/zinc oxide nanoparticles are used in an increasing number of medical and industrial applications due to their attractive physical, chemical and antibacterial properties. Therefore, achieving a simple and beneficial way to produce them is an important aspect. In this study, zinc/zinc oxide nanopowders were synthesized by fast electric discharges between two electrodes of (a) a spark device ...
متن کاملProviding a thermodynamic model to simulate the spark ignition engine fueled with natural gas and ethanol mixture
The use of natural gas as an alternative fuel, in recent decades has been proposed. Good combustion properties and cats less than it could be the perfect choice for the next generation. Simulation models can be of great help engine designers. Simulation models to reduce the time and costs for the development of new engines as well as in identifying the technical value that need special attentio...
متن کاملDistance and shape: perception of the 3-dimensional world by weakly electric fish.
Weakly electric fish orient at night in complete darkness by employing their active electrolocation system. They emit short electric signals and perceive the consequences of these emissions with epidermal electroreceptors. Objects are detected by analyzing the electric images which they project onto the animal's electroreceptive skin surface. This process corresponds to similar processes during...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Trends in neurosciences
دوره 25 1 شماره
صفحات -
تاریخ انتشار 2002