The number of repeating corresponding points on a wave that pass a given observation point per unit time.
- Diamonds Are Forever
Diamonds are still a girl's best friend, right? We love the shiny gems. They are the most popular rocks sold today. But what exactly are they, anyway? Where do they come from? What else are they used for?
- What's In Your Beverage? How to Ensure Quality Control with CO2 Analytical Support
Calibration standards, performance audits, and the FDA's never-ending safety, labeling, and inspection requirements are just the tip of the iceberg when it comes to dealing with the increasingly stringent quality control standards of the beverage industry. As these quality standards become...
- What are Compound Microscopes?
Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses. The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is...
- Protein Design: Automated protein discovery and synthesis
In this paper I describe (theoretically) the method(s) of automated protein discovery and synthesis.
- Features of the Scanning Tunneling Microscope
The scanning tunneling microscope (STM) invented by Heinrich Rohrer and Gerd Binnig in the 1980s still manages to do a great job today and competes with more advanced microscope types. The scanning tunneling microscope is used for studying the surface atoms that are found on various materials. The...
Nickel-cadmium cell (Nicad battery)
A dry cell in which the anode is Cd, the cathode is NiO2, and the electrolyte is basic.
Law of Conservation of Matter
There is no detectable change in the quantity of matter during an ordinary chemical reaction.
An impure form of carbon obtained by destructive distillation of coal or petroleum.
Ordinary batteries (voltaic cells) for flashlights. radios, and so on, many are Leclanche cells.
A thermometer used for accurate measurement of very small changes in temperature.
A form of energy that flows between two samples of matter because of their differences in temperature.
The process in which a heavy nucleus splits into nuclei of intermediate masses and one or more protons are emitted.
The pressure exerted by one gas in a mixture of gases.
Bonds resulting from the head-on overlap of atomic orbitals, in which the region of electron sharing is along and (cylindrically) symmetrical to the imaginary line connecting the bonded atoms.
Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.
The amount of energy absorbed in the process in which an electron is added to a neutral isolated gaseous atom to form a gaseous ion with a 1- charge, has a negative value if energy is released.
A salt or ester of xanthic acid. Many xanthates have a yellow color. Xanthates are used as flotation agents in mineral processing.
A thin partition between two solutions through which certain molecules can pass but others cannot.
Equation for a chemical reaction in which all formulas are written as if all substances existed as molecules, only complete formulas are used.
The sequence of steps by which reactants are converted into products.
The metal ion and its coordinating ligands but not any uncoordinated counter-ions.
An orgainic ion carrying a positive charge on a carbon atom.
A fairly strong dipole-dipole interaction (but still considerably weaker than the covalent or ionic bonds) between molecules containing hydrogen directly bonded to a small, highly electronegative atom, such as N, O, or F.
Energy required to pair two electrons in the same orbital.
Unit of electrical current, one ampere equals one coulomb per second.