User Rating: 0 / 5

Star InactiveStar InactiveStar InactiveStar InactiveStar Inactive
 

A common type of dry cell.

Latest Articles

  • 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...

  • 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...

  • Protein Design: Automated protein discovery and synthesis

    In this paper I describe (theoretically) the method(s) of automated protein discovery and synthesis.

  • 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...

Most Popular

Mole Fraction

The number of moles of a component of a mixture divided by the total number of moles in the mixture.

 

Rate-determining Step

The slowest step in a mechanism, the step that determines the overall rate of reaction.

Detergent

A soap-like emulsifer that contains a sulfate, SO3 or a phosphate group instead of a carboxylate group.

Intermolecular Forces

Forces between individual particles (atoms, molecules, ions) of a substance.

Energy

The capacity to do work or transfer heat.

Saccharide

An organic compound containing a sugar or sugars.

Diamagnetism

Weak repulsion by a magnetic field.

Oxidation-reduction Reactions

Reactions in which oxidation and reduction occur, also called redox reactions.

Exothermicity

The release of heat by a system as a process occurs.

Differential Thermometer

A thermometer used for accurate measurement of very small changes in temperature.

Specific Heat

The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

Nonelectrolyte

A substance whose aqueous solutions do not conduct electricity.

Heat of Solution

The amount of heat absorbed in the formation of solution that contains one mole of solute, the value is positive if heat is absorbed (endothermic) and negative if heat is released (exothermic).

Hydration Energy

The energy change accompanying the hydration of a mole of gase and ions.

Liquid Aerosol

Colloidal suspension of liquid in gas.

Activity of a component of ideal mixture

A dimensionless quantity whose magnitude is: equal to molar concentration in an ideal solution, equal to partial pressure in an ideal gas mixture, and defined as 1 for pure solids or liquids.

Optical Isomers

Stereoisomers that differ only by being nonsuperimposable mirror images of each other, like right and left hands, also called enantiomers.

Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

Born-Haber Cycle

A series of reactions (and accompanying enthalpy changes) which, when summed, represents the hypothetical one-step reaction by which elements in their standard states are converted into crystals of ionic compounds (and the accompanying enthalpy changes.)

Critical Point

The combination of critical temperature and critical pressure of a substance.