What on earth are Electron Microscopes?
Electron microscopes use "dancing" electrons rather than light to illuminate an object or sample.
First developed in 1931 in Germany for laboratory use, it was not until 1965 that electron microscopes were available commercially.
The first electron microscopes were produced by RCA.
So what kinds of things can you see with electron microscopes?
Electron microscopes can reveal the following information.
1. Topography-What does the surface of the object or sample look like?
Is it smooth?
Rough?
Hairy? Hard or soft?
2.
Morphology-What are the shapes of the particles that make up the sample?
Are they round, oval, square, triangle, or hexagonal?
Is it
made of strong or weak particles?
3.
Composition-What elements or compounds is the object made of?
Does it have oxygen or hydrogen in it?
What is its' melting point or freezing point?
4.
Crystallographic Information-What does the arrangement of the atoms look like?
What are its properties?
Electron microscopes are capable of magnifying an object or sample up to one million times.
This magnification allows scientists to use the electron microscopes to
distinguish individual molecules.
How do electron microscopes work?
Electron microscopes work in the same way as lighted microscopes except that instead of light, electrons "dance" across an object or sample and illuminate it.
Due to this beam's strength, fine detail can be seen including variations in its surface and what it is composed of.
A vacuum is used to speed up the electrons until their wave-length is shorter than that of white light.
The shorter wave-length allows higher resolution which results in fine detail.
These "dancing" electrons are then focused upon the object or sample and they form an image on the photographic plate.
Although electron microscopes are quite advanced, one of the drawbacks to their use is that it cannot show movements that occur in living cells because of the high vacuum that is necessary to cause the electrons to pass across the sample.
There are two different kinds of electron microscopes.
The Transmission Electron Microscopes or TEM's create an image by passing electrons through the object or sample.
The Scanning Electron Microscopes or SEM's give more of a 3D look of an object or sample and the magnification is shown on a television screen which gives more depth detail.
To impress your friends with your knowledge of electron microscopes you need to learn just a few things.
First, electron microscopes use beams of electrons to illuminate an object or sample rather than light.
Secondly, electron microscopes can magnify an object or sample up to one million times which shows great detail.
And lastly, electron microscopes are used by scientists, engineers and many others.
.
Looking at Microscopes
http://www.looking-at-microscopes.com
Take advantage of advances in technology with some light hearted reviews of devices designed to make our life easier. Here we look at microscopes: http://www.microscopes-reviewed.com/electronmicroscopes.html
Mike Spencer
http://www.electron-microscope-guide.com
LearnHypnosisNow.com, a portal for people interested in hypnosis and new home of the Learn Hypnosis... Now! ebook, officially launches
Michael Stevensone-mail protected from spam botsLiquid Mirror Enterprises24338 El Toro Road Suite E-414Laguna Hills, CA 92653 USAPhone (800) 516-9167Fax (714) 242-1736Liquid Mirror Enterprises launches LearnHypnosisNow.com, a new portal for people interested in hypnosis, and new home to the top-selling ebook, Learn Hypnosis... Now!September 12, 2003 -- Learn Hypnosis... Now! at LearnHypnosisNow.com has opened its doors to the public. Visitors to the site can learn about hypnosis, join the free semi-monthly newsletter, and purchase ebooks and paper-books from the site. The semi-monthly Learn Hypnosis...
Now! newsletter is designed for interested visitors, curious about hypnosis.
In the newsletter, Learn Hypnosis... Now! author Mike Stevenson provides tips and tricks, answers questions from visitors and readers, and offers special, members-only discounts on hypnosis related items.Free sample chapters from the book Learn Hypnosis... Now! are also available for free as a...
Sample resume > LearnHypnosisNow.com, a portal for people interested in hypnosis and new home of the Learn Hypnosis... Now! ebook, officially launches
Golf Vacation Travel Guide Uses Web Sites to Help Golfers See Scotland
(ContentDesk) January 11, 2006 -- Golfers looking to plan a golf vacation to Scotland can learn how to get the most from their trip by using Internet websites while saving money with Deans Scottish Golf Vacation Guide by Dean Knuth, a leading golf expert who is also known as the "Pope of Slope." The guide is an innovative e-book that allows online readers to go directly to web sites that are helpful in planning less-expensive golf vacations."With fourteen trips to Scotland on his r?sum? and his membership in the Royal & Ancient Golf Club, Dean Knuth qualifies as an American expert in Scottish golf," said Tod Leonard, golf editor for the San Diego Union Tribune. "He has produced a comprehensive, must-have online guide for anyone planning to visit and play there."Deans Scottish
Golf Vacation Travel Guide Uses Web Sites to Help Golfers See Scotland
Sample resume > Golf Vacation Travel Guide Uses Web Sites to Help Golfers See Scotland
The Right Keywords Can Get Your Resume Noticed Among the Harshest Competition
It's often been said that saying the right words at the right time is the key to success in the business world. If you have a line in your presentation that really captures attention?or if you say something particularly clever in a job interview?you may be able to achieve a career high you never dreamed possible.
It's also no secret that a resume needs to be worded quite carefully if it is to accomplish the job applicant's hoped-for results. While you're drafting the wording for your career highlights, job duties, and other essential information for your resume, you should give some serious attention to keywords.
How the High-Tech Revolution Changed Resume Reading
There was a time when employers took a stack of resumes that had been handed to them by their secretaries and proceeded to read through them, carefully laying aside those resumes that featured applicants that appeared to be suitable to the companies' needs. Of course, this was a painstaking,...
Sample resume > The Right Keywords Can Get Your Resume Noticed Among the Harshest Competition
Local Career Expert Adds Job Interview Credential
Seattle, WA (ContentDesk) April 4, 2004--"Landing the best job is now, more than ever, a two-step process. All job seekers should now be aware that failing to strategize the interview is, in many respects, failing to strategize the resume itself" says Andy Bethurum, Founder of Northwest Resumes. "The time has passed when a successful job search campaign can rely on the resume alone, strategic interviews have become the decisive factor in winning the best jobs."Andy Bethurum, a Certified Professional Resume Writer, launched Northwest Resumes in with Matt Thompson, NCRW. Located on the Web at(www.nwresumes.com), Northwest Resumes has played a vital role in the successful employment campaigns of countless mid-level and senior-level professionals in Information Technology, Healthcare, Non-Profit, Finance, Management, and Sales since inception in 2000.The Professional Association of Resume Writers & Career Coaches was founded...
Local Career Expert Adds Job Interview Credential
Sample resume > Local Career Expert Adds Job Interview Credential
Anticoagulant Tracking System (Coumadin? / Warfarin) Makes Compliance Immediate and Secure - Saferating Solves the Problem
Anticoagulation therapy uses powerful drugs (Coumadin? / Warafin) for life-saving treatment.
When these drugs are part of ongoing therapy for patients, their use must be carefully monitored and documented according to HIPAA regulations and JCAHO standards.Saferating.com has developed a complete documentation and reporting system that satisfies all of the requirements.
The Anticoagulation Clinic Documentation and other "Paperless Form Technology" are displayed in the new medical demonstration area of the Saferating.com web site. This allows visitors to access sample web forms used in the medical field. Additionally, potential clients may complete a simple registration before accessing Saferating's powerful query engine and sample data.According to Robert (Bob) Genest, CEO, "The demonstration area showcases Saferating's Paperless Form Technology ?.
This new area will allow our clients to experience online reporting in a user-friendly environment. Currently we have...
Anticoagulant Tracking System (Coumadin? / Warfarin) Makes Compliance Immediate and Secure - Saferating Solves the Problem
Sample resume > Anticoagulant Tracking System (Coumadin? / Warfarin) Makes Compliance Immediate and Secure - Saferating Solves the Problem
Susan O Gets $90,000-Plus Manager Post for CPA Firm, Thanks to Services of McKenzie Scott Partners
Denver, CO (ContentDesk) August 27, 2005 -- Susan O is now a $90,000+ manager for a CPA firm in the Southeast, thanks to McKenzie Scott Partners (http://www.mckenziescott.com). "Your team was invaluable to me," Susan said. "Linda H is a gem." Susan also complimented McKenzie Scott Partners' "Plan and Process" as well as several McKenzie Scott resources, including Chris F.Reporting to the president, Susan will manage the professional staff, develop new clients and client services, and run the professional operations. She's excited about her future, and the role McKenzie Scott played in helping her win this job."It's a terrific environment and good people," she said. "The location is easily accessible, I have a tremendous opportunity to grow the firm with the full support of the owner, and it's a decent compensation package with room for financial growth and good profit-sharing opportunities.
"Your team was invaluable to...
Susan O Gets $90,000-Plus Manager Post for CPA Firm, Thanks to Services of McKenzie Scott Partners
Sample resume > Susan O Gets $90,000-Plus Manager Post for CPA Firm, Thanks to Services of McKenzie Scott Partners
The Good Cook Recipe Book, by The Master's Heart Bible Fellowship of Sun Country Meadows, Published in Oct. 2004, is Now Available Through JeannieMay Enterprises
(ContentDesk) November 13, 2004 -- On JeannieMay's website you can read sample recipes, the Table of Contents, a page from the index, and photo of the cover.
Sections include: Salads, Sauces, Marinades; Soups, Stews, Chowders, Chili; Meat, Poultry, Fish, Seafood; Vegetables and Vegetarian Dishes; Breads, Rolls, Sweet Rolls; Desserts and Sweets; Beverages and Sandwiches; Appetizers, Snacks, and Game Night Meals; Pickles, Jams and Jellies; special recipes for breakfast and brunch, potlucks, camping and holidays, as well as wild game recipes, historical fare, international dishes and food kids love to eat. There is a non-food section with "beauty, home and play" recipes.
In back of book are weights and measures and other helpful tables, an index, and the very special "Amy's Recipe.".
Sample resume > The Good Cook Recipe Book, by The Master's Heart Bible Fellowship of Sun Country Meadows, Published in Oct. 2004, is Now Available Through JeannieMay Enterprises
Sample resume
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