Essays Tagged: "Pigment"

Color perception principles

light sensitive cells in the retina, called cones. The light senitivity comes from a photosensitive pigment called iodopsin or visual purple. When a photon of light triggers the iodopsin an enzyme is ...

(8 pages) 213 0 2.6 Mar/2002

Subjects: Science Essays > Biology > Human Biology


he word 'albinism' refers to a group of inherited conditions. People with albinismhave little or no pigment in their eyes, skin, or hair. They have inherited genes that do notmake the usual amounts of ... binism are called 'ty-negative' and'ty-positive'. Persons with ty-negative albinism have no melanin pigmentation, and moredifficulty with vision. Those with ty-positive albinism have very slight pigme ...

(2 pages) 35 0 3.0 Mar/1997

Subjects: Science Essays > Biology

Maori Tattooing Practices

laced on their faces, thighs, and buttocks. They tattooed by dipping a sharpened piece of bone into pigment, which was then tapped, on the area of skin to be tattooed, with a mallet. This art form was ... mallet was usually made of fern stalk. They wiped away the blood with flax fiber or bark cloth. The pigment for the tattoos was made from burning the heart of white pine wood or the gum from the Kauri ...

(8 pages) 91 0 3.9 Dec/2002

Subjects: Social Science Essays > Anthropology

The permability of membranes in beetroot

experiment that I am carrying out will show me what effects temperature will have on the amount of pigment released by beetroot when it is placed in water. After I gathered up all the apparatus I the ... soon as all the beetroot is in the liquid, I will time it for 20 minutes to make sure that all the pigment that is going to leave during that experiment will have left the beetroot at that temperatur ...

(2 pages) 75 0 4.8 Feb/2003

Subjects: Science Essays > Biology

Beetroot cell membrane permeability experiment

Practical AssessmentPlanningAIMBeetroot cells contain a red pigment, which is stored in the cell vacuole and a vacuole membrane to prevent this leaking out of t ... surrounds it. The outer of the cell is also surrounded by a membrane, which again helps contain the pigment inside the cell. In this experiment I aim to find out the relationship between the leakage o ... ter as our substance as it has a pH 7 and this is neutral and will have no affect on the leakage of pigment.APPARARATUS·Safety goggles·Cutting mat·Test tube holder·5 test t ...

(6 pages) 40773 1 4.6 Feb/2003

Subjects: Science Essays > Biology

Investigation on how light intensity affects the rate of Photosynthesis.

contain specialized cell structures called chloroplasts. Chloroplasts contain molecules of a green pigment called chlorophyll, consisting largely of carbon and hydrogen. It gives green color and abso ...

(3 pages) 75 1 3.4 Nov/2003

Subjects: Science Essays > Biology > Plant Biology

"The Justification and Rationalization of the Ku Klux Klan". About how KKK thought what they were doing was right. Includes examples of crimes etc. 5 pages, 1704 words

very open minded and to carry no prejudice. I had always thought that everyone was equal, and one's pigment made them different from others. So why is it that the people of the KKK can have so much ha ...

(7 pages) 82 0 5.0 Dec/2003

Subjects: History Term Papers

A lab about Chromotography an Chlorophyll

?Remember that every spot of color regardless if it's the same color is another spot is a different pigment. (Note: that green at the starting point that remains is different from the other greens tha ... ble and moved with the solvent front") Use the information below to help you identify the different pigments you have on your chromatogram. List them in your answer.Pigments ColorChlorophyll a = Green ...

(2 pages) 44 0 1.0 Jan/2004

Subjects: Science Essays > Biology > Plant Biology

Photosynthesis and Chromatography

ChromatographyPlanning B- This experiment is an analysis of the separation of plant pigments. The analysis is done to examine the types of pigments found in spinach leaves mixed with a ... o the long pointed centrifuge tube. A capillary tube was cut at the end to absorb some of the green pigment. Using the tube, a dot of green was dabbed onto the different papers 1 cm above the tip and ...

(3 pages) 63 0 4.0 Feb/2004

Subjects: Science Essays > Biology > Plant Biology

Photosynthesis Coursework

ves a little to use for respiration (releasing energy from food). The sunlight is absorbed by green pigment called chlorophyll.Much of the glucose is turned into other substances such as starch.Starch ...

(5 pages) 72 0 1.0 Mar/2004

Subjects: Science Essays > Biology > Plant Biology

Red Heart Book Review

ocked hair that is only normal among the Feral Nation.The Feral Nation is a group who take pills to pigment themselves into a darker race. They do this because they think that it is the only way to su ...

(1 pages) 25 0 5.0 Jun/2004

Subjects: Literature Research Papers

A report on paints and their chemicals

ch develops a film between the surface and the environment. This film or surface coating may have a pigmented or clear composition that dries to form an opaque solid film.Paint is made up of a complex ... e a specific function to allow the paint to work. These are placed in three categories: The binder, pigment and medium. The binder holds the pigment together and provides adhesion for the rest of the ...

(3 pages) 34 0 3.5 Oct/2004

Subjects: Science Essays > Chemistry

How light intensity effects the rate of photosynthesis.

as a waste productbut saves a little bit to use for respiration. The sunlightis absorbed by a green pigment called chlorophyll.Most of the glucose is turned into a substance called starch.Word equatio ...

(8 pages) 81 0 4.0 Dec/2004

Subjects: Science Essays > Biology > Plant Biology


the integrity of the beetroot cell membrane will be destroyed and a subsequent release of beetroot pigment will be released into its surrounding milieu(in this case distilled water).In the experiment ... of the temperature on every sample will stay the same, i.e. if having a bigger beetroot sample less pigments will be released into the test tube at lower temperature, or having a smaller beetroot samp ...

(4 pages) 44 0 4.0 Jan/2005

Subjects: Science Essays > Biology

Beetroot cell membranes

of the temperature on every sample will stay the same, i.e. if having a bigger beetroot sample less pigments will be released into the test tube at lower temperature, or having a smaller beetroot samp ... will be released into the test tube at lower temperature, or having a smaller beetroot sample more pigment will be released into the test tube. This error will change the results of the experiment at ...

(4 pages) 31 0 0.0 Feb/2005

Subjects: Science Essays > Biology

The New Jersey Pine Barrens

ees, water in the Pine Barrens appears a brownish red color. Thishappens because the roots emit pigments of red color into the soil which then runs into the water. Even though the amount of red p ...

(2 pages) 22 0 3.7 Jun/2005

Subjects: Science Essays > Technology

Charles Dickins

s on bottles in a blacking warehouse (blacking was a type of manufactured soot used to make a black pigment for products such as matches or fertilizer). Dickens, already scarred psychologically by the ...

(4 pages) 57 0 3.5 Aug/2005

Subjects: Literature Research Papers > Biographies


roduce oxygen by photosynthesis. The key to photosynthesis is the ability of chlorophyll, the green pigment in plants, to convert sunlight into chemical energy.In measuring the temperature of the atmo ...

(6 pages) 75 1 4.2 Oct/2005

Subjects: Science Essays > Earth Sciences

2ND review of: "Black like me."

the white race and the Negroes is to become a Negro. He informs his wife of his idea to change the pigment of his skin and stay in New Orleans for a week to conduct this type of experiment. He would ...

(6 pages) 18 0 0.0 Dec/2005

Subjects: Literature Research Papers > North American

Biology Lab Report on the extraction of Chlorophyl from Plant Leaves

AbstractThis experiment focused on extracting and separating pigments of Chloroplast. For the procedure green leaves were grinded in a mortar with some chemicals ... n a filter paper and later, after dried placed into a beacon of solvent. After this the chloroplast pigments were separated by the solvent into groups of more or less soluble pigments.AimHow many pigm ... any pigment types are present in a green leaf?It is hoped to be able to identify the four different pigments types of a leaf. As the filter paper with the solvent will separate the pigments in terms o ...

(3 pages) 50 0 3.0 Mar/2006

Subjects: Science Essays > Biology > Plant Biology