When resistors dissipate power they produce heat and care should be taken to prevent exceeding the specified ratings of the resistor. This article gives an overview of estimations necessary and things to take into account.
Ranikhet disease (RD) is the most common, the most widely prevalent, and economically the most important viral disease of poultry. It is a very severe, sudden, and rapidly spreading disease; and may be seen from 6th to 7th day onward up to 72 weeks. It occurs throughout the year, but is most common in the summer.
The resistance of electrical components is often related to the temperature. The coefficient of temperature gives an indication of how the temperature is connected to the resistance.
Proton nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for the analysis and characterization of organic compounds. Certain principles must be understood to facilitate mastery of NMR concepts. This article is designed to discuss the basics of understanding the rudiments of chemical shift based upon electronegativity, hybridization, and magnetic anisotropy.
Madagascar, may not be the largest island in the world (official estimates place it fourth), but it is regarded as the oldest. Such has been the long period of isolation between Madagascar and Africa/India that something like 85% of the indigenous fauna and flora of the island are found nowhere else on Earth. Scientists have found evidence of the ancient land mass that once joined India and Madagascar together and they had to explore beaches on Mauritius to do it.
A team of researchers have got to the bottom of a fishy puzzle that had palaeontologists previously in a spin. ?Fossils of an ancient cartilaginous fish known as Helicoprion show a whorl of spiral, saw-like teeth but up until now scientists were unsure where on this prehistoric fish the teeth whorl was located. A new study by a team of researchers from Idaho has revealed the location of this strange structure in the jaws of this prehistoric fish.
A very carefully written and thought provoking introduction on Heat and temperature. Very useful for Online Physics Learning on the web.
There have been a number of scientific papers published recently that provide information on the feeding habits of apex Crocodyliform predators of the Late Cretaceous such as Deinosuchus. A new research paper highlights the feeding behaviour of Late Cretaceous, but smaller species of Crocodyliform. These predators may have attacked and eaten smaller dinosaurs, including an as yet to be described new species of Hypsilophodont.
You’ve heard of HEPA filters and have probably seen one in your car or vacuum cleaner. Did you know that HEPA filters were originally created to prevent the spread of airborne radioactive contaminates during the Manhattan Project? It’s true, the same filters that keep the air clean in your car also helped keep scientists safe during the 1940′s.
Clinical research training involves many different aspects. It also employs many people with healthcare backgrounds.