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Diesel Engine Basics
A diesel engine is an internal combustion engine that uses compression ignition to ignite the fuel as it is injected into the engine.

DIESEL ENGINES VS. GASOLINE ENGINES

It is helpful to an understanding of how diesel engines work to compare the differences between a diesel engine and a gasoline engine. The main differences…[Leia mais]

Piston rings have triple purpose
Piston rings seal the combustion chamber. They are set with precision so as to apply the correct pressure on the cylinder wall or liner, which ensures there is a consistent film of oil across the cylinder’s working surfaces. This provides sufficient lubrication and protects against wear.

Piston rings from Perkins…[Leia mais]

Use And Care Of Reagent Bottles
Many of our kits include reagent bottles for steeping and storing bitters. This type of bottle has been used to store chemicals for at least 150 years, though the idea for the ground glass stopper dates back to the late 1700s. The combination of glass bottle and stopper makes the container very resistant to chemical…[Leia mais]

Are Composition Shingles and Asphalt Shingles the Same Thing?
The roofing industry is full of different names and terms that are hard to understand as a homeowner. This can be confusing and often frustrating.

Especially when different roofing contractors use different terms to mean the same thing. This brings us to a commonly asked question,…[Leia mais]

Are You Storing Food Safely?
Whether putting food in the refrigerator, the freezer, or the cupboard, you have plenty of opportunities to prevent foodborne illnesses.

The goal is to keep yourself and others from being sickened by microorganisms such as Salmonella, E. coli O157:H7, and C. botulinum, which causes botulism. Keeping foods chilled at…[Leia mais]

Bauxite Facts
Bauxite is a mineral with a dull, earthy luster which is usually white or gray, though sometimes can be found stained by yellow, orange, red, pink, or brown by iron or included iron minerals. It has no cleavage, a low specific gravity, and the Mohs Hardness Scale score is between 1 and 3. Its streak is usually white, but its iron…[Leia mais]

The Truth About Scented Candles
The Impact Of Fragranced Products

For many people, home wouldn’t be the same without scents from candles, room sprays, plug-ins, incense sticks, and oils, filling the air. However, in addition to adding scent, they may also be adding health risks from:

Paraffin wax

Lead-core wicks

Synthetic fragrance

While…[Leia mais]

What is a Dropper Bottle Used For?
Dropper Bottles are used for storing liquid medication such as eye-drops. The glass dropper bottle is one of the safest methods for storing medicine. The reason the glass dropper bottle is considered the safest storage method is that it does not allow chemicals to be transmitted into the contents of the bottle.…[Leia mais]

How Is Energy Stored in Batteries?
We use energy constantly – when we’re awake, when we’re asleep, no matter what we’re doing. We tend to take for granted how easy it is for us to obtain the energy required to power devices, appliances, tools, machines, vehicles, and all the things we use throughout the day and night. But how is energy stored so t…[Leia mais]

Do you really need a stand mixer? Yes, and here’s why
True story: A long time ago, as a lowly magazine assistant with the ink still drying on my grad school degree, I dreamed of a promotion beyond my usual duties of grabbing lunch for my bosses and answering reader mail. When the day finally came and I got my own cubicle, a new title on my…[Leia mais]