Essays Tagged: "Diffusion"

Essay on Population. - The principal argument against the perfectibility of man and of society has never been fairly answered - Nature of the difficulty arising from population -

unlooked for discoveries that have taken place of late years in natural philosophy, the increasing diffusion of general knowledge from the extension of the art of printing, the ardent and unshackled ...

(8 pages) 133 0 4.4 Dec/2002

Subjects: Area & Country Studies Essays

Marketing: L'Oreal

sion des produits grand public : produits distribues en grands surfaces et articles à grande diffusion.Division des produits de luxe : une série de grandes marques reconnues.Division des ... :- des produits vraiment innovants,- la rapidité de lancement de ces nouveaux produits,- une diffusion rapide de ces produits nouveaux.2.3.3 - Portefeuille d'activitésAu sein du dé ...

(37 pages) 321 1 4.3 Mar/2003

Subjects: Businesss Research Papers > Marketing

Greenlake, Seattle Report: life formes, dissolved oxygen, coliform, BOD, nitrates and phosphates, etc.

cosystem, causing a bad chain reaction.Dissolved OxygenDissolved oxygen gets into the water through diffusion, by surrounding the water with the oxygen. Dissolved oxygen gets into the water more easil ...

(5 pages) 54 1 5.0 May/2003

Subjects: Science Essays > Earth Sciences

Osmosis, of potato chips, got real good mark.

er to spread from regions of high concentration to regions of low. This spreading process is called diffusion.Several examples of osmosis can be seen in nature that can give a better idea of what is h ... potato will be found when the potato is put into a concentration of solution in which no osmosis or diffusion of water takes place. From my own general knowledge, I know that the water content of pota ...

(13 pages) 118 0 4.5 Nov/2003

Subjects: Science Essays > Biology


doms Protista and Prokaryotae have no specialized respiratory mechanisms; instead, they rely on the diffusion of oxygen and carbon dioxide across a cell membrane. The concentration of oxygen in the or ...

(2 pages) 46 1 3.4 Feb/2004

Subjects: Science Essays > Biology > Human Biology

Osmosis summary and how to set up an experiment where one could figure out the molar of unkown solutions

Diffusion is defined as the spontaneous tendency of a substance to move down its concentration gradi ... re is a high concentration of them to where there is a low concentration. Osmosis is said to be the diffusion of water across a selectively permeable membrane. A membrane is said to be selectively per ...

(2 pages) 37 0 3.0 Feb/2004

Subjects: Science Essays > Biology

Osmosis and potato chip invetigation. To determine the effect that varying salt concentration, in a solution, has upon the osmotic ability of potato chips of a given size

a selectively permeable membrane, from a dilute to a concentrated solution.It is a special form of diffusion because it can only involve water molecules. However, it is not an isolated laboratory pro ...

(8 pages) 61 0 3.0 Feb/2004

Subjects: Science Essays > Biology

Investigation into osmosis in potato cells.

Osmosis CourseworkIntroduction to OsmosisOsmosis is a special kind of diffusion. Diffusion is the movement of particles from a high concentration to a low concentration u ... particles from outside the bag move into it to even out the concentration. This happens because of diffusion. So as more water particles entered the visking tubing bag the level of liquid rose in the ...

(9 pages) 76 1 3.0 Apr/2004

Subjects: Science Essays > Biology

Determining the Isotonic solution in Sheep Erythrocytes Isotonic solution of red blood cells (Laboratory) red blood cell sizes in saline red blood cell expansion in salt

es across it. Water exchange can be measured in two ways: RBC osmotic permeability is measured, and diffusional water permeability is measured (Benga and Borza 1995). Diffusion is the movement of high ... d (Benga and Borza 1995). Diffusion is the movement of high concentration to low concentration. The diffusion of water across a permeable membrane is called osmosis. Water concentration in red blood c ...

(4 pages) 35 0 4.0 Apr/2004

Subjects: Science Essays > Biology

During this dissertation the technical characteristics of a radial flow pump were examined....

he characteristic curves were determined.The influence of the rotational speed and the angle of the diffusion casing vanes were also examined.In addition the hydraulic losses of the pump were also cal ... ts have taken place. Objective of the first experiment is to test the pump at several angles of the diffusion casing vanes at a constant rotational speed. By observing the characteristic flow curves f ...

(19 pages) 65 0 5.0 May/2004

Subjects: Science Essays > Engineering > Mechanical Engineering

Seven ways the animals survive and respond to their environment.

ease carbon dioxide. Because of their very simple, thin-walled bodies, some animals can rely on the diffusion of these substances through their skin. Most other animals, however, have evolved complex ... for respiration.Circulation: Many small aquatic animals, such as some aquatic worms, rely solely on diffusion to transport oxygen, nutrients, and waste products among all their cells. Diffusion is suf ...

(2 pages) 35 0 4.2 Oct/2004

Subjects: Science Essays > Biology

Osmosis Lab Report

IntroductionThe purpose of this experiment was to demonstrate osmosis. Osmosis is the diffusion of water across a selectively permeable membrane (Bell et al 2004). Osmosis is the movemen ...

(2 pages) 32527 0 3.0 Nov/2004

Subjects: Science Essays

"The Cultural Diffusion of African Music in Modern day Mainstream American Culture"

ip, easing the pain of work, communication and entertainment. Then, when the slave trade commenced, diffusion took African culture all over the world. For instance, the worship music diffused into Gos ... ed atmosphere in the U.S for some during the 1800's and early 1900's (Baker). It was formed but the diffusion of European music and African music. For instance, the double-bass and the horn are both i ...

(6 pages) 96 0 4.7 Jan/2005

Subjects: Art Essays > Music History & Studies

A GCSE essay on the effects of osmosis on potato chips in different molar solutions

Introduction:Osmosis is a special kind of diffusion.Diffusion is the movement of particles from a high concentration to a low concentration un ...

(4 pages) 27 0 2.1 Feb/2005

Subjects: Science Essays > Biology

Cell wall transport

Part 1 - Diffusion through an Artificial MembranePurposeThis experiment will demonstrate differential permeab ... lution. Observe and check for color changes. Iodine molecules in the solution (orange) will flow by diffusion through the pores in the bag to the inside, where there is no iodine yet (flow is from con ... yellow green blueConclusionIn dialysis, small molecules pass through a membrane by diffusion. It is like dust blowing through a screen window while keeping bugs out. Diffusion also pr ...

(3 pages) 45 0 3.7 Mar/2005

Subjects: Science Essays > Biology

Slang, youth subculures and rock music

ang4. Creators of slang5. Sources6. Linguistic processes forming slang7. Characteristics of slang8. Diffusion of slang9. Uses of slang10. Attitudes toward slang11. Formation12. Position in the Languag ... trol) would have little impact if the expression Russian roulette were not already in wide usage.8. Diffusion of slangSlang invades the dominant culture as it seeps out of various subcultures. Some wo ...

(92 pages) 926 1 3.6 Mar/2005

Subjects: Social Science Essays > Sociology

This is a lab report studying the effects of common foods on bacteria. Works cited included.

rganisms.It is relatively easy to quantify the effects of antibiotics on bacteria by using the disk diffusion test (345). The potential antibiotic is impregnated onto filter disk in the center of a de ... look like a blank space in bacterial growth. The size of the zone is dependent of three things: the diffusion rate of the antibiotic, the degree of sensitivity of the bacterium, and the growth rate of ...

(8 pages) 68 0 5.0 Apr/2005

Subjects: Science Essays > Biology

Water Potential of a Potato.

tually be able to measure a value for, as it is a pressure value (kPa).Osmosis is a special form of diffusion involving only water molecules. It is defined as "The passage of water from a region of hi ...

(6 pages) 21 0 3.0 Oct/2005

Subjects: Science Essays > Biology

To what extent did Khrushchev help diffuse the Cold War up to 1960?

policies during 1953 to 1960, his involvement in the Cold War was instrumental to the eventual full diffusion of tension between the United States and the USSR. He made his intentions of ending monoli ...

(2 pages) 15 0 2.3 Nov/2005

Subjects: History Term Papers > World History > The Cold War

Osmosis In Plant Cells

Osmosis is the diffusion of water molecules from an area of high concentration of sucrose solution to an area of lo ... ation gradient in osmosis. Two diagrams of osmosis are shown in figures 1 and 2. Figure 1 shows the diffusion of water molecules through a selectively permeable membrane from an area of highly concent ...

(7 pages) 53 3 3.0 Feb/2006

Subjects: Science Essays > Biology > Plant Biology