Bacteria and Viruses

Bacteria and Viruses

Peggy Thomas | ISBN: 1-59018-438-6 | 113 pgs | 8 mb

People do not realize how often they come into contact with bacteria and viruses. These microscopic organisms are in the air, on the surface of this book, and inside people’s bodies digesting their last meal. Most people do not fully appreciate that microbes are responsible for the oxygen they breathe, the healthy vegetables on the kitchen table, the pungent cheese in the refrigerator, the clean clothes in the closet, and the clean water coming through the plumbing. Every aspect of people’s lives and every part of the natural world is affected, for better or worse, by the actions of bacteria and viruses.

And the worst comes in the form of disease. Even though the overwhelming majority of the encounters with microbes go unnoticed, people are quick to respond when a run-in gives them a runny nose, fever, upset stomach, or more severe symptoms. Some bacteria and viruses cause such pain and devastation that they become headline news. Every year novel microbes are discovered and new infectious diseases emerge. It is not big news when a new bacterium is discovered living harmlessly in the soil, but it is broadcast when a virus mysteriously crops up out of nowhere and killsunsuspecting victims.
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How-to Hydroponics

How-to Hydroponics
Keith Roberto | ISBN - 0-9672026-1-2 | Pdf | 102 pgs | 7 mb

How-To Hydroponics has been written in an easy to follow
style that combines a basic yet comprehensive background in the
science of hydroponics with the hands-on experience that makes
learning fun. Whether you grow for fun, food or profit, this
completely revised edition covers everything you’ll need to know
to develop a working knowledge of the technology.

You’ll learn, step-by-step, how to build and operate all the
hydroponic and aeroponic systems detailed for construction in the
book. You’ll learn how to grow your favorite flowers, herbs and
veggies with this exciting technology that is revolutionizing the
agricultural industry.
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Bookkeeping and Accounting

Bookkeeping and Accounting
Schaum's Series | ISBN 0-07-142240-4 | Pdf | 144 pgs | 2 mb

Based on Schaum’s Outline of Theory and Problems of Bookkeeping and Accounting, Third Edition
by Joel J. Lerner, M.S.,Ph.D.

Abridgement Editors by Da niel L. Fulks, Ph.D. and Michael K. Staton

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Magnetic Stripe Reader

Magnetic Stripe Reader
Billy Hoffman | Make Vol. 01 - 2005 | Pdf | 16 pgs | 3 mb

Open your wallet. How many cards in there have magstripes on them? If you're like me, the answer is five or six. Ever wonder what's encoded on them?

I did. One day a friend of mine had a $200 off-the-shelf magstripe reader, so I ran my cards through it. Aside from the expected credit card numbers, I was surprised by the amount of personal information encoded on them. In fact, for reasons I still don't know, two cards contained my Social Security number.

Now you can find out. This project shows you how to make a magstripe reader for less than $40.

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$14 Video Camera Stabilizer

$14 Video Camera Stabilizer
A cheap and simple way to eliminate jittery action shots
Johnny Lee | Make Vol. 01 - 2005 | Pdf | 15 pgs | 4 mb

Professional camera stabilizers use a complex, levered arrangement to capture smooth-looking video, even when the camera and camera operator are in motion. The camera operator may walk (or even jog), move through tight hallways and doorways, and climb up and down stairs without shaking the camera.

Unfortunately, professional Steadicams cost upwards of $10,000. Even cheap, third-party stabilizers cost at least $600. So I decided to make my own. It cost me $14. Here's how you do it.

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