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Topic: How to prepare an onion cell slide

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	Onion - Wikipedia, the free encyclopedia
		Onions (usually but not exclusively the bulbs) are edible with a distinctive strong flavour and pungent odour which is mellowed and sweetened by cooking.
		Onions are frequently used in school science laboratories because they have particularly large cells which are easily visible even through rather low-end optical microscopes.
		Onions can be used, usually chopped or sliced, in almost every type of food, including cooked foods and fresh salads, and as a spicy garnish; they are rarely eaten on their own (except in poor or traditional cultures), but usually act as accompaniment to the main course.
	en.wikipedia.org /wiki/Onion (980 words)

	Cell (biology) - Open Encyclopedia (Site not responding. Last check: 2007-10-21)
		All cells whether prokaryotic or eukaryotic have a membrane, which envelopes the cell, separates its interior from the surroundings, strictly controls what moves in and out and maintains the electric potential of the cell.
		This membrane serves to separate and protect a cell from its surrounding environment and is made mostly from a double layer of lipids (fat-like molecules) and proteins.
		Prokaryotic cells have three architectural regions: appendages called flagella and pili—proteins attached to the cell surface; a cell envelope consisting of a capsule, a cell wall, and a plasma membrane; and a cytoplasmic region that contains the cell genome (DNA) and ribosomes and various sorts of inclusions.
	open-encyclopedia.com /Cell_(biology) (3492 words)

	How to prepare an onion cell slide - Open Encyclopedia (Site not responding. Last check: 2007-10-21)
		This activity is one of the first uses of an optical microscope that most students encounter in a biology lab.
		Onions are used because they have large cells that are easily visible under a microscope and the preparation of a thin section is very straight forward.
		An onion is made of many concentric layers.
	open-encyclopedia.com /How_to_prepare_an_onion_cell_slide (571 words)

	wikien.info: Main_Page (Site not responding. Last check: 2007-10-21)
		Onions (usually but not exclusively the bulbs) are edible with a distinctive strong flavour and pungent odour which is mellowed by cooking.
		Onions are probably one of the oldest crops grown by humans, being mentioned in the Bible Book of Numbers (11:5) as part of the Egyptian diet of that time.
		Onions can be used, usually chopped or sliced, in almost every type of non-dessert food, including cooked foods and fresh salads, and as a spicy garnish; they are rarely eaten on their own, but usually act as accompaniment to the main course.
	www.hostingciamca.com /index.php?title=Onion (729 words)

	Prepared Microscope Slides (Site not responding. Last check: 2007-10-21)
		A single, 3-inch long glass slide is shown with a cover glass in place A microscope slide is a thin sheet of glass used to hold objects for examination under a microscope.
		A prepared piano is a piano that has had its sound altered by placing objects (preparations) between or on the strings or on the hammers or dampers.
		In Cage's use, the preparations are typically nuts, bolts and pieces of rubber to be lodged between and entwined around the strings.
	www.wwwtln.com /finance/148/prepared-microscope-slides.html (1245 words)

	Learn more about How to prepare an onion cell slide in the online encyclopedia. (Site not responding. Last check: 2007-10-21)
		This activity is one of the first uses of an optical microscope that most school children encounter in a school biology lab.
		Onions are used because they have large cells that are easily visible under a student microscope.
		Lay the membrane flat on the surface of a clean glass slide, and then add one drop of dye (iodine or methylene blue).
	www.onlineencyclopedia.org /h/ho/how_to_prepare_an_onion_cell_slide.html (335 words)

	Cell_(biology) (Site not responding. Last check: 2007-10-21)
		The cell is the structural and functional unit of all living organisms, sometimes called the "building blocks of life." Some organisms, such as bacteria, are unicellular, consisting of a single cell.
		All cells whether prokaryotic or eukaryotic have a membrane, which envelopes the cell, separates its interior from the surroundings, controls what moves in and out, and maintains the electric potential of the cell.
		The cytoplasm of a eukaryotic cell is surrounded by a plasma membrane.
	www.usedaudiparts.com /search.php?title=Cell_(biology) (3415 words)

	Microscope\|microscopic Information (Site not responding. Last check: 2007-10-21)
		The science of investigating small objects using such an instrument is called microscopy, and the term '''microscopic''' means minute or very small, not easily visible with the unaided eye.
		This is an opticsoptical measuring instrumentinstrument containing one or more Lens (optics)lenses that produce an enlarged image of an object placed in the focal plane of the lens(es).
		Compound optical microscopes can magnify an image up to 1000× and are used to study thin specimens as they have a very limited depth of field.
	www.echostatic.com /Microscope\|microscopic.html (1099 words)

	wikien.info: Main_Page (Site not responding. Last check: 2007-10-21)
		A microscope is an instrument for viewing objects that are too small to be seen by the naked or unaided eye.
		This is an optical instrument containing one or more lenses that produce an enlarged image of an object placed in the focal plane of the lens(es).
		Compound optical microscopes can magnify an image up to 1000X and are used to study thin specimens as they have a very limited depth of field.
	www.hostingciamca.com /index.php?title=Microscope (1108 words)

	Working with the Light Microscope - Observing Plant and Animal Cells (Site not responding. Last check: 2007-10-21)
		Prepare a wet mount of the section of onion tissue, being careful to not let the skin double over.
		Select a group of cells and move the slide so that the cells are in the middle of the field of view.
		Again, move the slide so that the group of cells is in the centre of the field of view.
	personal.nbnet.nb.ca /trevgall/biology/onion.html (310 words)

	Mr. Rick's High School Cell Pages
		Prepare an onion cell wet mount by slicing a very thin section of onion root.
		Prepare an epithelial cell wet mount by scraping the inside of your cheek with a clean toothpick.
		Prepare an algae cell wet mount using a miniscule piece of algae from class supply.
	www.galaxynet.com /~corvid/cel/cell_onion_epithelial.htm (216 words)

	Microscope_slide (Site not responding. Last check: 2007-10-21)
		A microscope slide is a thin sheet of glass used to hold objects for examination under a microscope.
		Many objects that are going to be viewed on a microscope slide are prepared as a wet mount using water.
		For example, a graticule slide is a microscope slide that is marked with a grid of lines (for example, a 1 mm grid) that allow the size of objects seen under magnification to be easily estimated.
	www.freecaviar.com /search.php?title=Microscope_slide (679 words)

	howto (Site not responding. Last check: 2007-10-21)
		A how-to is an informal, often short, description of how to accomplish some specific task.
		See procedural knowledge for a discussion of what sort of knowledge is imparted, and how far it can be imparted, in how-tos.
		How to distinguish a monocot from a dicot
	www.yourencyclopedia.net /Howto.html (268 words)

	How To Guides: How to prepare an onion cell slide (Site not responding. Last check: 2007-10-21)
		This activity is one of the first uses of an optical microscope that most school children ever encounter in a school biology lab.
		Onions are used because they have large cells that are easily visible under a student microscope.This experiment is normally performed by children between the ages of 11 - 14.
		An onion is made of lots of concentric layers.
	how-to.informationslurp.com /Prepare_an_onion.html (267 words)

	Biological cell (Site not responding. Last check: 2007-10-21)
		The cell is the basic unit of life.
		These functions and abilities are expressed in the cell cycle: the "birth", growth, reproduction, and "death" of individual cells.
		Organisms vary from single cells (called single-celled organisms) that function and survive more or less independently, through colonial forms with multiple similar cells living together, to multicellular forms in which cells are specialized and do not generally survive once separated.
	usapedia.com /b/biological-cell.html (695 words)

	prepare a microscope slide + prepare a microscope slide high-quality listings (Site not responding. Last check: 2007-10-21)
		to a microscopic slide by means of a pipette, covered with a covered slip and examined under the microscope at 100x magnification.
		How to prepare an onion cell slide Details, Meaning How to prepare an onion...
		To prepare a wet mount, obtain a microscope slide and the stool specimen.
	www.microscopex.com /b/prepareamicroscopeslide (1227 words)

	Cell Biology: Microscopy, Kent State University -- Cell Prep (Site not responding. Last check: 2007-10-21)
		The cells are said to multiply over a wide range of temperatures (0 to 36C; though we haven't tried 0C yet!) with optimal growth between 28C and 34C.
		The cells respond to angiotensin II and release calcium (however contractile activity is lost in culture).
		Cheek cells may be stained with Lugol's' (nucleus brown, cytoplasmic granules light brow) or methylene blue (nucleus and cytoplasm stain shades of green).
	dept.kent.edu /projects/cell/CPREP.HTM (969 words)

	microscope (Site not responding. Last check: 2007-10-21)
		A microscope is an instrument for viewing objects that are too small to be seen by the naked eye.
		The most common type of microscope, and the first to be invented, is the optical microscope.
		This is an optical instrument containing one or more lenses that produce an enlarged image of the object, and works by refraction (the bending of light).
	www.yourencyclopedia.net /Microscope.html (214 words)

	Prepare A Microscope Slide (Site not responding. Last check: 2007-10-21)
		...Microscope, Onion, Membrane, Slide, Microscope, Forceps, Tweezers, Iodine.....To Prepare An Onion Cell Slide ..
		Prepare a microscope slide by putting a drop of mounting medium (I use Cargilles Meltmount, refractive index 1.662) in the middle of a standard 1 x 3 (25 mm x 75 mm) microscope slide.
		The process is: Prepare microscope slide with cells in metaphase of mitosis, Treat slide with a weak base.
	best-in-microscopes.com /microscopes/prepare-a-microscope-slide.html (651 words)

	The Onion Information (Site not responding. Last check: 2007-10-21)
		Onions are frequently used in school science laboratories because they have particularly large cell (biology)cells which are easily visible even through rather low-end optical microscopes.
		As onions are sliced, cell (biology)cells are broken open.
		Onion cells have two sections, one with enzymes called allinases, the other with sulfursulfides (amino acid sulfoxides).
	www.echostatic.com /The_Onion.html (913 words)

	Xl1 Blue Competent Cells (Site not responding. Last check: 2007-10-21)
		The quick heat shock creates a thermal gradient which, in turn, creates a draft leading into the cell, allowing extra-chromosomal DNA (such as plasmids) to enter the cell, allowing the bacterium to be genetically modifed.
		They wrote that a core competency is "an area of specialized expertise that is the result of harmonizing complex streams of technology and work activity." As an example they gave Honda's expertise in engines.
		To take an example from the automotive industry, it has been claimed that Volvo’s core competence is safety.
	www.wwwtln.com /finance/219/xl1-blue-competent-cells.html (1014 words)

	Plant cell Structure
		The presence of the hypertonic solution surrounding the cells should have caused the cells to plasmolyze (plasmolysis is the shrinkage of the protoplasm of plant cells, causing it to pull away from the cell wall).
		Plant cells generally are connected to one another by structures called plasmodesmata which, although structurally complex, appear at low magnification to be thin strands of protoplasm passing through the cell wall to join the adjacent cells.
		Obtain a prepared slide of a cross-section of a Tilia stem.
	www.esu.edu /~milewski/intro_biol_two/lab_1_plant_cell/Plant_Cell.html (575 words)

	What Can You Find in a Cell?
		Specimen tissues used for wet mount slide preparation should be very thin.
		Prerequisite instruction and preparation should include practice in the proper use of a microscope and preparation of a wet-mount slide.
		Cell sources might include things such as: onion, Elodea, potato, red bell pepper, green bell pepper, wandering jew leaf, beef liver, chicken muscle, human cheek, or any other interesting plant or animal cells.
	www.usoe.k12.ut.us /curr/science/core/plans/bio/cells.html (470 words)

	Melton - A STUDY OF CELL STRUCTURE
		A general knowledge of cell biology, the existence of cells, cell structure differences in plant and animal cells, variety in cells and some understanding of what cell structures do is important to further study in life science biology.
		In this series of laboratory exercises students will see several types of cells, will observe some differences in plant and animal cell, use the names of several cell structures and hopefully become more familiar with their functions, and will develop more proficiency in microscope techniques and slide making.
		Prepare another slide of onion membrane, but this time add a drop of methylene blue before you add the cover glass.
	members.aol.com /drlena/cell-structure.htm (696 words)

	cell
		This lab is not intended to introduce you to the many (~200) kinds of cells in your body, we save that until Biology 206!, rather, the purpose is to show what cells have in common, and to make interesting comparisons between animal and plant cells.
		The cells of Elodea leaves are only a few cell layers thick: focus on the upper level to see chloroplasts scattered throughout.
		Some cells are mobile and move to different locations in order to carry out their function(s).
	faculty.pnc.edu /pwilkin/cell.html (676 words)

	Onion (Site not responding. Last check: 2007-10-21)
		This happened alongside the cultivation of leeks and garlic and it is thought that the slaves who built the pyramids were fed radishes and onions.
		Cocktail onions, or pickled pearl onions, are used to garnish drinks such as martinis.
		In 2005, a poll of 2,000 people revealed that the onion was Britain's favourite culinary vegetable.
	www.worldhistory.com /wiki/O/Onion.htm (953 words)

	Onion Cell on Almondnet (Site not responding. Last check: 2007-10-21)
		Parts of a Onion Cell and Onion Cell Structure and Cheek Cell and Onion Cell Lab...
		From an onion to an onion cell's DNA, the Recipe for Life' is found inside cells.
		History of Onions and Onion Newspaper and Onion Facts and Onion Satire and Onion Cell...
	www.mortgage-advisors-northern-ireland.co.uk /mortgageireland/onion_cell.html (452 words)

	Types of Microscopes -- Parts of the Microscope
		lenses that produce an enlarged image of an object placed in the focal plane of the lens(es).
		Compound optical microscopes can magnify an image up to 1000× and are used to study thin specimens as they have a very limited
		The resolution is maximally in the order of an average 10× objective in a compound microscope, and often much lower.
	www.edinformatics.com /inventions_inventors/microscope.htm (1037 words)

	Onion - FreeEncyclopedia (Site not responding. Last check: 2007-10-21)
		An onion is the bulb of the hardy biennial herb Allium cepa.
		Onions are frequently used in school science laboratories because they have particularly large cells which are easily visible through an optical microscope.
		See also The Onion for the parody newspaper.
	openproxy.ath.cx /on/Onion.html (103 words)

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