Essays Tagged: "Petri dish"

Studying Soil Bacteria. Microbiology Lab.

flame.4. Cool the loop for 5-10 seconds. Do not put the loop down.If your work is being done from a petri dish culture continue the previous steps with the following:5. Lift the lid from the petri dis ... cultures from the first agar plate to a second one using the guidelines for plate streaking from a petri dish culture which are stated above.4. The cultures are to be streaked in 4 different labeled ...

(6 pages) 139 1 2.9 Jan/1996

Subjects: Science Essays > Microbiology

Should surrogate motherhood be permitted?

usbandcan produce a large amount of sperm is not a problem. Once theegg and sperm are combined in a petri dish fertilization is verylikely to occur. The couple will then choose a surrogatemother and m ...

(4 pages) 98 0 3.4 Mar/1997

Subjects: Law & Government Essays > Law

Stem Cell- clearly describes the benefits of stem cell research to modern medical research and advancement- done for a high school Anatomy/Physiology class-5 pages

came about when researchers took sperm from a man and an egg from a woman and fertilized them in a petri dish for several days until they became a blastocyte, or a ball of cells. The researchers then ...

(7 pages) 638 1 4.6 Jun/2002

Subjects: Science Essays > Biotechnology

Bacterial Growth

are microscopic, measuring 1 micron in length. However, colonies of bacteria grown in a laboratory petri dish can be seen with the unaided eye.There are many divisions and classifications of bacteria ... effective in inhibiting bacterial growth. First, the different bacteria were placed on agar inside petri dishes. Then, antibiotic discs were placed into the dishes. Each bacteria was exposed to every ...

(5 pages) 135 0 5.0 Jan/1996

Subjects: Science Essays > Biology

Investigation: what conditions affect water loss from leaves?

se two pictures show cross-sections of leaves and the most important parts are labelled.Apparatus15 petri dishes.15 leavesChemical balancesFridgeFreezerOvenThermometerTin FoilMethodI chose 15 leaves a ... aves and measured their surface area and mass. We then numbered the leaves and put them in numbered petri dishes with the underside facing up. We then wrapped the petri dishes in tin foil so that the ...

(3 pages) 40 0 4.2 Nov/2002

Subjects: Science Essays > Biology

Research Paper on bacterial colonies in households. Includes technical information on different bacterial growth factors and examples.

irtiest things to exist due to mix of bacteria from variety of people.My experiment was done with 8 Petri dishes, 3 25"x30" newspaper sheets, 10 cotton swabs, 18 oz of petroleum jelly, have a cup of a ... .1. First take the jar with agar and heat it for 2 minutes in the microwave.2. Evenly pour in the 8 Petri dishes.3. Take the lids off of the PDs (Petri Dishes) and let the agar cool in them into a jel ...

(4 pages) 72 0 4.6 Feb/2003

Subjects: Science Essays > Biology

CHROMATOGRAPHY

tiny test tube, small brown bottle, petroleum ether, plant leaf, dried parsley flakes, water, glass petri dish, stapler, sand, spatula, pipette, capillary tube, Whatman filter paper, a 50 ml chromatog ... ere:1. Pour 50 ml of chromatography solvent into the tall jar and cover it with half of the petri dish.2. Take ½ teaspoon of dried parsley flakes and ¼ teaspoon of sand i ...

(2 pages) 44 0 3.0 May/2004

Subjects: Science Essays > Biology > Plant Biology

The Controversy on Embryonic Stem Cell Research

her type of stem cell found in human embryos. To harvest these, scientists must create embryos in a petri dish that are then destroyed at the end of the process. Another source of obtaining these stem ...

(5 pages) 217 0 1.8 Dec/2004

Subjects: Science Essays

Stem Cell Research

zygote, pre-embryo, embryo, and fetus" describe a human being with a soul ("Question: What's in the Petri Dish, Property or Person?"). On the issue of stem-cell research, the Catholic Church believes ...

(4 pages) 49 0 3.0 Apr/2005

Subjects: Social Science Essays > Controversial Issues

Stem Cell Research.

in need of it by replacing the damaged cells. Cells can also be harvested from embryos created in a Petri dish specifically for usage in stem cell research. Stem cells have not yet been used to cure d ...

(2 pages) 45 0 3.0 Dec/2005

Subjects: Science Essays > Genetics & Genome Projects

Bacteria and Antibiotic Lab Write Up

reI followed the given procedure step by step. However, I accidentally put tape on the edges of the Petri dish when I placed it in the tray to be incubated. So I had to take it out, and remove the tap ...

(5 pages) 55 0 3.0 Apr/2006

Subjects: Science Essays > Biology

Experiment write up, including method and discussion on testing food substances for the presence of lipids (fats)

te. The watsits were ground using a mortar and pestle. All of the other substances were placed into petri dishes; the butter, margarine and lard were placed in directly; the bacon and cheese were thin ... maller than diameter of test tube so it's less likely that food will be dropped when transferring itPetri dish Contains food samples Practical size making it easy to remove samples fromMortar and Pest ...

(9 pages) 36 0 3.0 Oct/2006

Subjects: Science Essays > Biochemistry

Science fair Lab Report

e: Door handlesDependent Variable: Amount of bacteriaControl Variables: Volume of agar, size of the Petri dishes, temperature.Research question: What is the amount of bacteria on different door handle ... their hands are dirty and when they touch the handle it will get bacteria from their hands.Method15 Petri dishes were prepared by pouring Agar into them. Then, samples from 4 door handles (bathroom ou ...

(5 pages) 30 0 3.0 Nov/2006

Subjects: Science Essays > Biology

Hatchet

a place more used then more will grow on the spot of the dish where the tape was placed.MATERIALS: petri dish, tape, marker, microscope, incubator, bacteria slide, nutrient agar, distilled water, cry ... tebook PROCEDURE: Collecting bacteria: 1.First get all the materials that are needed. 2. Divide the petri dish into four equal parts, and number each section. 3. Take a piece of tape, about 1 ½ ...

(4 pages) 13 0 0.0 Apr/2001

Subjects: Science Essays > Biology

The Effect Of Different Distance Intensities Of Light On Terrestrial Isopods:

of terrestrial isopods (rolypolies) on the unlighted side on the petri dish.Control: The unlighted side of the opened up petri dish.Purpose: To deter ... at 1, 2, and 3 meters distance.Constants: The temperature of the room, petri dish, time trials for each trial of light distance testing, and the number of trials.Materials ...

(3 pages) 1406 0 0.0 Jun/2001

Subjects: Businesss Research Papers

Duckweed Lab Report

The possible sources of error are, miscounting, mistakes in K PO and other organisms living in the petri dish besides duckweed.Conclusion The hypothesis was shown to be true, because the resu ...

(1 pages) 2656 0 0.0 Nov/2001

Subjects: Science Essays > Biology

Isopod Behavior Lab Report

nism's behavior and what they do.Hypothesis:For my hypothesis I wrote, "If the pill bugs are in the petri dish with the other chemicals then they will go to the filter paper where the sugar is more so ... sing my personal taste, I was better able to make my decision on my hypothesis.Materials:4 Pill BugsPetri Dish2 Pieces of Filter PaperPen or pencilDropperClockWaterSalt SolutionSugar SolutionVinegarNo ...

(7 pages) 26 0 5.0 Nov/2007

Subjects: Science Essays > Biology

Acid Rain Experiment.

seedlings will be exposed to, the length of time the seeds were left on the window cillApparatus- 6 Petri dishes- 6 discs of cotton wool- 60 cress seedlings grown for four days in the sunlight- Sodium ... niversal indicator paper- Transparent plastic bagProcedure1. Place a piece cotton wool disc in each Petri dish.2. Place 20 cress seedlings equally in each Petri dish, on the cotton wool.3. Pour 7cm3 o ...

(3 pages) 5248 0 0.0 Jan/2008

Subjects: Science Essays > Environmental Science

The use and abuse of anti-biotics

cally combat particular infections.Alexander Flemming discovered penicillin in the famous "mould in petri dish experiment" in 1928. Flemming realized that the mould in his petri dish was producing a s ...

(5 pages) 14 0 0.0 Feb/2008

Subjects: Science Essays > Biology

Serendipity

scovery of penicillinby Alexander Fleming in 1928.While working on lab studies,he noticed mold in a petri dish in which some Staphylociccus bacteria was growing. Surrounding the mold was a clear area. ...

(1 pages) 7 0 0.0 Feb/2008

Subjects: Science Essays > Biology