Essays Tagged: "Potato"

Biology experiment on osmosis for gcse very good got an A* as course work so do not miss out

The effects of osmosis on potatoes placed in different salt concentrationIntroduction:Osmosis is a movement of water across a ... ying concentrations of a salt solution on the amount of osmotic activity between the solution and a potato of a given size.Osmosis:Process of OsmosisOsmosis is the process of the flow of one constitue ... ituents of a solution to pass through; only a few allow a selective flow. That is why I have chosen potatoes as my semi-permeable membrane.In osmosis, a solvent (often water) moves from a region of lo ...

(15 pages) 314 2 4.2 Mar/2002

Subjects: Science Essays > Biology > Plant Biology

Why had the potato become the staple diet in Ireland in the 1840s?

Why had the potato become the staple diet in Ireland in the 1840'sThe introduction of the potato in the sixteent ... agriculture and the fluctuation of its population. The reason the Irish became so dependant on the potato was due to the colonial system. When Britain was experiencing an industrial revolution, Irela ... em, helping to increase the population and forcing the Irish to rely heavily on one food source.The potato originated in Cuzco, located in the Andes of Peru. It was brought to Spain in 1565 by Spanish ...

(12 pages) 180 3 4.3 Apr/2002

Subjects: History Term Papers

The Influence of Columbus's Voyage on Europe and the Rest of the World

n addition to Europe changing the New World, the Americas also affected Europe by foods such as the potato and corn, and resources such as gold and crops such as sugarcane. As you will see, these effe ... reover, the introduction of new products into Europe was beneficial. Some important things were the potato, corn, chocolate, and native animals such as the turkey and llamas. This exchange of goods an ...

(6 pages) 166 1 4.3 Nov/1996

Subjects: Area & Country Studies Essays

Biology Osmosis

lution, through a partially permeable membrane. In this case, the tiny holes in the membrane of the potatoes will allow the water molecules to pass through in and out of the solution and the potato, d ... se, when the water concentration is lower in the tissue, the water will go inside the tissue of the potato, and the potato will gain weight. And if there is very little different in the two water conc ...

(7 pages) 210 3 4.6 Mar/2003

Subjects: Science Essays > Biology

Biology AT1-osmosis in potatoes.

ary WorkFor my preliminary work I used a cork borer of 10mm width, to cut three chips from a single potato. I got them to be 55mm in length and the average mass of the three chips was about 5.7 grams, ... 55mm in length and the average mass of the three chips was about 5.7 grams, also the width of each potato chip was 10mm. I put the potato on a white tile so it didn't damage the table.To begin with I ...

(6 pages) 40 1 4.0 Oct/2003

Subjects: Science Essays > Biology

Osmosis, of potato chips, got real good mark.

Investigation into the Rate of Osmosis in Potatoes and to find out the Sucrose Concentration of the Potato.IntroductionIn order to carry out t ... ant cell in a concentrated solution:HypothesisThe aim of the investigation is to explore osmosis in potatoes and find its sucrose concentration. With regard to the osmosis, it will be taking place acr ... ose concentration. With regard to the osmosis, it will be taking place across cell membranes in the potato. The cells in the potato will be similar to the plant cells explained previously in terms of ...

(13 pages) 118 0 4.5 Nov/2003

Subjects: Science Essays > Biology

I am going to investigate how the temperature affects the catalyse enzyme on hydrogen peroxide, using potato discs for the catalyse.

am going to investigate how the temperature affects the catalyse enzyme on hydrogen peroxide, using potato discs for the catalyse.HypothesisCatalyse is a biological enzyme which works best between 30 ... nd oxygen. Plant and animal cells contain catalyse.`I predict that the catalyse enzyme found in the potato will break down the substrate (Hydrogen Peroxide) quickest at 37- 40 degrees Celsius because ...

(6 pages) 48 0 3.7 Jan/2004

Subjects: Science Essays > Biology

What affect the substrate has on the rate of reaction with the enzyme in potato?

vestigationTaskTo find out what affect the substrate has on the rate of reaction with the enzyme in potato.Variables1. PH2. Temperature3. Concentration of substrate4. C ... re3. Concentration of substrate4. Concentration of enzyme5. Surface area of potato lumps6. TimeKey VariablesInput variables - concentration of substrateOutput variable ...

(3 pages) 29 0 3.0 Feb/2004

Subjects: Science Essays > Biology

An investigation to compare the reaction rates between potato an hydrogen peroxide and liver and hydrogen peroxide

An investigation to compare the reaction rates between potato and hydrogen peroxide against liver and hydrogen peroxide through loss in mass.Background inf ... lot of hydrogen peroxide and therefore do not need to have a lot of catalase to get rid of it. The potato is a tubur, which means it is a store of food for plants. It is an extension of the root of t ... tain a lot of catalaseAim:My aim is to compare the reaction rates between crushed liver and crushed potato when placed in hydrogen peroxide through loss in mass and see which tissue cells contain the ...

(8 pages) 68 1 4.2 Feb/2004

Subjects: Science Essays

Biology coursework.

PlanningThe aim for my experiment is to investigate how a small piece of potato affects the rate of reaction with hydrogen peroxide.For this investigation the following coul ... ng could be changed could changed:·Concentration or hydrogen peroxide·Surface area of potato·Temperature·Mass of potato·CatalystThe following could be measure and ob ... ss of potato·CatalystThe following could be measure and observed:·Time·Size of PotatoI am going to be changing the concentration of hydrogen peroxide. The volume will be 30ml so w ...

(2 pages) 29 0 3.0 Mar/2004

Subjects: Science Essays > Biology

An experiment to look at the effect of 1 factor on an enzyme

most cells, however it is mostly concentrated in the liver, kidney and tuber cells of plants (e.g. potato).HypothesisI predict that as the temperature increases the oxygen produced will increase unti ... entrationI will use the substrate from the same bottle without dilution. I will take my cuttings of potato from the same region.Surface AreaI will use the same cork borer and cut all of the potato to ...

(6 pages) 51 1 4.7 Mar/2004

Subjects: Science Essays > Biology

An Investigation Into The Factors Affecting Osmosis

PlanningMy aim for this experiment is to see the results of potato tissue's mass difference, when placed in different concentrations of sugar solutions.Variable ... affecting osmosis, is the concentrations of the solution that helps me to investigate osmosis with potato tissues. The different sugar concentrations will be changed to see the result of the potatoes ... gs that I'll be measuring in this experiment on osmosis is the mass change and length change of the potatoes placed in different molarities of sugar solutions. I will record the masses in grams by usi ...

(14 pages) 72 1 5.0 Jul/2004

Subjects: Science Essays > Biology > Plant Biology

Written Assignment #1: Critical comparative analysis of "Yorkshire Slavery" by Richard Oastler and "An Address by a Journeyman Cotton Spinner."

ich had been decimated by the plague, was greatly stimulated when Spanish conquistadors brought the potato back from Peru in the 16th century ("The Potato Then & Now"). Because of the Industrial R ... living in a free country, they were very much enslaved by the Industrial Revolution.Works Cited"The Potato Then & Now." http://collections.ic.gc.ca/potato/glossary/index.asp> (18 Sept.2003).Wik ...

(4 pages) 25 0 5.0 Oct/2004

Subjects: History Term Papers

Osmosis Lab Report

on. Hypotonic solution is the solution with the lower salt concentration. My hypothesis is that the potato core will increase in size. When the solution is hypertonic, the potato will decrease in size ... will increase in size. When the solution is hypertonic, the potato will decrease in size making the potato hypotonic. Osmosis is really interesting, that is why I chose to write this report about it.M ...

(2 pages) 31794 0 3.0 Nov/2004

Subjects: Science Essays

AT1- Osmosis In Potatoes

Aim: Investigate the movement of osmosis through a selectively permeable membrane, in this case potato.Introduction: Osmosis is the movement of water through a semi permeable membrane, separating ... llows you to make hypotheses before performing actual tests.For my preliminary work, I used 33mm of potato. It was easy to cut 33mm and get it to weigh around 1g. To begin, we used 15mls of Glucose so ...

(8 pages) 33 0 3.0 Jan/2005

Subjects: Science Essays > Biology

To find out the optimum pH at which the enzyme catalase would best break down hydrogen peroxide.

or the investigation. The four choices of sources which were available were liver, apple, yeast and potato. Each source was cut up into 1cm3 sections and placed in four separate test tubes which each ... evidence of what happened.Catalase source Degree of bubbling Number of timesrelights glowing splintpotato normal 1apple little 0liver a lot 7yeast Quite a lot 3As the result show above, the potato wa ...

(11 pages) 53 0 4.3 May/2005

Subjects: Science Essays > Biology

Water Potential of a Potato.

Investigating the Water Potential of a Potato.I have been asked to investigate the water potential of a potato. During my investigation I w ... s is because the cellulose cell wall prevents it from bursting.PlanTo find the water potential of a potato I will be placing fixed volumes of potato, with the same surface area, into different concent ... concentrations of sucrose solutions.Preliminary ExperimentWhat I DidI began by cutting cylinders of potato using a borer which had a diameter of 1cm. I then cut the cylinder of potato to a fixed lengt ...

(6 pages) 21 0 3.0 Oct/2005

Subjects: Science Essays > Biology

Tomato Spotted Wilt Virus.

articles.The virus Tosporius, in the family Bunyaviridae has many hosts including; tomato, tobacco, potato, lettuce, pepper, eggplant, cauliflower, celery, endive, spinach, pea, dahlia, sweet pea, zin ...

(1 pages) 15 0 3.4 Dec/2005

Subjects: Science Essays > Forestry

Pill Bug Lab Report

purpose of this experiment is to determine what kind of food the sow bug prefers; decaying leaves, potatoes, grapes, or sow bug food.HypothesisIf a sow bug is placed in a choice tray, and has access ... sow bug food.HypothesisIf a sow bug is placed in a choice tray, and has access to decaying leaves, potatoes, grapes, and sow bug food, the sow bug will choose the decaying leaves over its other optio ...

(6 pages) 21 0 0.0 Jan/2006

Subjects: Science Essays > Biology

Investigation to see the effects of increasing the surface area of a potato when mixed with Hydrogen Peroxide.

In my coursework I will investigate about enzymes in potatoes reacting with Hydrogen Peroxide. In particular I will investigate the effects of changing t ... h Hydrogen Peroxide. In particular I will investigate the effects of changing the surface area of a potato when added to Hydrogen Peroxide. This is because, when increasing the surface area of the pot ... l increase the rate of reaction because there will be more surface area on which particles from the potato and the Hydrogen Peroxide will collide on, and with more surface area there would be more par ...

(7 pages) 15 0 0.0 Feb/2006

Subjects: Science Essays > Biology