"Determining The Absorption Spectrum Of Leaf Pigments" Essays and Research Papers

  • Determining The Absorption Spectrum Of Leaf Pigments

    Determining absorbance of various wavelengths of light for pigments present in Coleus plants Joseph Yung (King Yung) 212831426 Adrian Ionescu Section M 11 February 5, 2014 Absorbance Table Absorbance Spectra Figure 1: Absorption spectra of pigments found, through chromatography, within Coleus plants. The different wavelengths of light were determined by the use of a spectrophotometer Questions ...

    Absorption, Carnivorous plant, Chemical polarity 826  Words | 3  Pages

  • A Spectrophotometric Analysis of the Absorption of Green Light Versus Red Light Absorption in Spinach Leaves

    A Spectrophotometric Analysis of the Absorption of Green Light Versus Red Light Absorption in Spinach Leaves The goal of the experiment was to determine if green light had less ability to absorb than red light in spinach leaves. This was done by separating the photosynthetic pigments (chlorophyll a, chlorophyll b, carotene and xanthophylls) from one another using paper chromatography. The separated pigments were then analyzed for their absorption spectrum using a spectrographometer. When the...

    Absorption, Chlorophyll, Chromatography 1512  Words | 5  Pages

  • The Absorption Spectrum Of Cobalt Lab R

    The Absorption Spectrum of Cobalt(II) Chloride Thang Dinh Lab partner: Alex Yang CHM 151 – 102 11/17/2014 Introduction: Many compounds absorb a certain spectrum of visible light. Since Beer’s Law describe the relationship between molar absorptivity and concentration, one could use his equation A = kc to find the unknown concentration by the known absorptivity. The graph of absorption spectrum is represented by a linear regression. From the graph, one could deduct that as the concentration decreases...

    Absorbance, Absorption, Concentration 456  Words | 6  Pages

  • The Effcts of Different Wavelengths on Leaf Pigments

    for this experiment, the study of the effects of different wavelengths on leaf pigments, if chlorophyll a absorbs blue-violet light, chlorophyll b absorbs blue light, carotene absorbs blue-green light, and xanthophyll absorbs blue light, then wavelengths of greatest absorption will be 400, 450, 500, and 450 respectively. • Independent Variable: Wavelengths • Dependent Variable: optimum wavelengths of light for absorption • Standard Variable: method of measurement, what was measured • Predictions:...

    Absorbance, Absorption, Chlorophyll 420  Words | 2  Pages

  • Abstract on Determining the Photosynthetic Activity in Plants Using Different Wavelengths of Light Using Chromatography and a Spectrophotometer

    Abstract on Determining the Photosynthetic Activity in Plants Using Different Wavelengths of Light using Chromatography and a Spectrophotometer In this experiment, the separation of particular pigments, contained within a fresh spinach leaf, were examined. Paper chromatography is the process of separating certain molecules, or pigment molecules, based upon their polarity. Four different pigments were examined from the spinach leaf: chlorophyll a, chlorophyll b, xanthophyll, and carotene. Based...

    Color, Electromagnetic radiation, Light 464  Words | 2  Pages

  • Chromatography of Photosynthetic Pigments

    Chromatography of Photosynthetic Pigments Abstract In this experiment a process of chromatography was used to separate chlorophyll a, chlorophyll b, xanthophyll, and beta carotene. When these pigments were obtained they were used to measure the wavelengths by way of spectrophotometer of each and the total of all the pigments wavelength. Introduction Photosynthesis is a process by which plants use the sunlight to convert it from light energy into chemical energy. This equation shows us how...

    Carotene, Chlorophyll, Chromatography 893  Words | 3  Pages

  • Extraction of Plant Pigment

    INTRODUCTION Plant pigments consist of four main chemicals. These are Chlorophylls, The carotenoids, Anthocyanin and Betacaine. The aims of this experiment is to separate the plant pigment into different colours using solvents and column chromatography. The hypothesis of this experiment is that this plant pigment from spinach will contain the chlorophyll pigment or may contain the others too. Chlorophyll: Chlorophyll a is the main component of the plant pigments. This is used for the most...

    Absorption, Color, Electromagnetic radiation 1610  Words | 6  Pages

  • Absorption

    Absorption Spectroscopy Lab Abstract: The concentration of the red dye in the Gatorade sample was 6.12x10^-5 g/mol. Also, from the data, we can detect that an average human being weight 60 kg, would have to consume 11,849,510 g of this sample to reach the LD50. Using Absorption Spectroscopy to determine the molar concentration of a solution is affective when there is a stock solution with a known concentration, which in this case is Red dye #40. Introduction: There are some dangers...

    Analytical chemistry, Chemistry, Concentration 910  Words | 4  Pages

  • Analyzing And Comparing The Absorption Of Visible Light Of Spinacia Oleracea And Musa Acuminata

    comparing the absorption of visible light of Spinacia oleracea and Musa acuminata Pruthvi Pediredla Due: February 21, 2014 BY 214: Botany I certify that this work is solely my own, and any outside source was paraphrased and properly cited. Abstract The purpose of this study is to give insight about the role of absorption in plants and to compare two particular plants, Spinacia oleracea and Musa acuminata, which use different wavelengths of light to display various pigments of color...

    Chlorophyll, Color, Green 1022  Words | 9  Pages

  • Photosynthetic Pigments

    The evolutionary relationships among cyanobacteria, red algae, brown algae, green algae, and flowering plants, observed from the results their photosynthetic pigment patterns using thin layer chromatography technique Introduction Endosymbiosis is a process where unicellular organisms engulf other cells resulting a life form that one or both cells are dependent on each other (Campbell et al., 2008). Strong evidence suggests that different types of photosynthetic cyanobacteria underwent endosymbiosis...

    Algae, Brown algae, Chlorophyll 1582  Words | 5  Pages

  • Light Reactions and Plant Pigments

    The Effect of Light Reactions on Plant Pigmentation Alyssa Martinez AP Biology 4th pd E. Perkins Abstract In this lab, we were to separate pigments and calculate Rf values using plant pigment chromatography, describe a technique to determine the photosynthetic rate, compare photosynthetic rates at different light intensities using controlled experiments and explain why rate of photosynthesis varies under different environmental conditions. In the second part of the lab, we used chloroplasts...

    Chlorophyll, Chloroplast, Light 1762  Words | 6  Pages

  • Chromatography of Pigments

    The purpose of this paper is to help analyze or compare pigments from two organisms. Chromatogram is the pattern that the chromatography paper has created from its substances. A retention factor, also abbreviated as an Rf value, is the measurement of the distance that the sample had traveled. The formula for an Rf value is migration distance of solvent front divided by migration distance of substance. An Rf value is the distance the pigment travels from the original spot, which is the dot, of solvent...

    Chromatography, Color, Green 665  Words | 3  Pages

  • Light Begins

    separate plant pigments using paper chromatography, and to measure the rate of photosynthesis in isolated chloroplasts. Because of capillary action the solvent moves up the paper causing the pigments to become visible at certain distances. The substances visible on the paper are called pigments. Chlorophyll a is the main pigment that makes up about 75% of the pigmentation in plants. Chlorophyll b makes up about 25% of the pigmentation. And carotenes and xanthophyll’s are accessory pigments that make up...

    Chlorophyll, Chloroplast, Electromagnetic radiation 1040  Words | 4  Pages

  • Investigation of Photosynthetic Pigments in Spinach

     Investigation of Photosynthetic Pigments in Spinach Michael Yacoub BIOL&211 Lori Hayes Investigation of Photosynthetic Pigments in Spinach Introduction: Purpose: To demonstrate the existence of the pigments of photosynthesis in spinach by separating them using chromatography, then measure them using spectrometry. There are multiple pigments in photosynthesis, the varying pigments allow the plant to absorb light at various wavelengths which allows the plant to derive...

    Absorption, Chlorophyll, Electromagnetic radiation 1309  Words | 11  Pages

  • Plant Pigment Lab

    Plant Pigment Lab Question: What pigments are present in Red Wandering Jews? Background: A leaf is filled with many pigments. The pigments are usually masked by the prevalence of the green chlorophyll. Anothocyanin(red or purple), carotene(orange), and xanthrophyll(yellow) are found in different proportions in different leaves. Leaf pigments can be separated by using paper chromatography. Paper chromatography is a technique that extracts pigments into a paper filter called chromatogram. What...

    Autumn leaf color, Chlorophyll, Color 968  Words | 4  Pages

  • Separation of Photosynthetic Pigments by Paer Chromatography

    Separation of Photosynthetic Pigment by Paper Chromatography I. INTRODUCTION There are different types of components in plant pigments. The most important and abundant chemical pigment found in plants is chlorophyll. This pigment exists in two forms; chlorophyll a and chlorophyll b. Chlorophyll a, being the main photosynthetic pigment, has a primary purpose to convert light energy to chemical energy used by the plant itself. Chlorophyll b absorbs light in a region of the spectrum apart from the dominant...

    Carotene, Chlorophyll, Chromatography 1538  Words | 5  Pages

  • Separation of Chlorophyll a, Chlorophyll B, and Beta Carotene by Paper Chromatography

    Abstract Pigments extracted from different greens have different polarities and may be different colors. Mixed pigments can be separated using chromatography paper. Chromatography paper is able to separate mixed pigments due to their polarity and solubility. Pigments of chlorophyll a, chlorophyll b and beta carotene will be separated on chromatography paper because each has its own polarity and solubility, which results in different distance traveled up the paper. Beta carotene is non-polar so it...

    Chemical polarity, Chlorophyll, Chromatography 1323  Words | 4  Pages

  • Photosynthesis

    are about half a million chloroplasts per square millimeter of leaf surface. The color of a leaf comes from chlorophyll, the green pigment in the chloroplasts. Chlorophyll plays an important role in the absorption of light energy during photosynthesis. Chloroplasts are found mainly in mesophyll cells forming the tissues in the interior of the leaf. O2 exits and CO2 enters the leaf through microscopic pores called stomata in the leaf. Veins deliver water from the roots and carry off sugar from...

    Atom, Calvin cycle, Chloroplast 1830  Words | 6  Pages

  • Gas Absorption

    ATENEO DE CAGAYAN CAGAYAN DE ORO CITY GAS ABSORPTION COLUMN - MASS TRANSFER EXPERIMENT B ChE 35 Chemical Engineering Laboratory II Acabo, Dean Cris Aguirre, Ian Carlo Belarmino, Arniel Catan, Charles John Engr. Marco Theodore E. Escaňo ChE 35 Instructor October 2012 OBJECTIVE: To calculate rate of absorption of carbon dioxide into water from analysis of liquid solutions flowing down the absorption column. THEORETICAL BACKGROUND: Absorption refers to the transfer of a gaseous component...

    Carbon dioxide, Carbonate, Gas 1447  Words | 6  Pages

  • Chromatography of Plant Pigments

    CHROMATOGRAPHY OF PLANT PIGMENTS Marquez, Ma. Rica Paulene, Moises, Patrisha Kate, Policarpio, Jairus Paolo, Rolda, Zylene Joy Department of Biology, College of Science, University of the Philippines Baguio April 23, 2013 ABSTRACT The objective of this experiment was to apply the technique of paper chromatography as a method for separating individual plant pigments contained in plant tissue extracts containing pigment blends. The process of chromatography separates molecules because of the...

    Biological pigment, Chemistry, Chlorophyll 1376  Words | 5  Pages

  • Photosynthesis: Electromagnetic Radiation and Silver Beet

    Light Absorption by Photosynthetic Pigments in Silver Beet Abstract The aim of the experiment was to determine the absorption of differing wavelengths of light by individual pigments in the vegetable silver beet. Pigments were extracted from silver beet leaves and separated into chlorophyll a, chlorophyll b, and carotene via chromatographs. Chlorophylls were then separated and an absorption spectra created using results obtained from a spectrophotometer. It was clear there were two distinct peaks...

    Absorption, Chlorophyll, Electromagnetic radiation 1152  Words | 4  Pages

  • Absorption Spectroscopy: Beer-Lambert Law

    Absorption Spectroscopy Author: Cesar M. Lemas Lab Partners: Jahnnan Jayesh Patel, Myong Ho Lee & Salem Alsaif Instructor: Jordan Andrew Mudery Chem 151, Section 7D Date Work Performed: October 18th 2012 Date Report submitted: October 25th 2012 Abstract Absorption spectroscopy is a practical way to find what the light absorption of a substance is, and whit this data combining the Beer’s law equation you can determine the concentration of different things in a solution, in...

    Absorption, Absorption spectroscopy, Analytical chemistry 1043  Words | 4  Pages

  • Absorption Coefficient

    Measuring the Absorption Coefficient for Some Common Materials Used in Functional Rooms through Standing Wave Ratio Adonis Cabigon1, Alaiza Tangaha2 Department of Physics, University of San Carlos, Nasipit, Talamban, Cebu City 6000 1adoniscc@yahoo.com 2mayalaiza92@yahoo.com Abstract In this paper, we present the measurement of the absorption coefficient α of MDF (Medium Density Fiberboard) and Fiber Cement through an improvised standing wave apparatus consist of an enclosed tube with...

    Acoustics, Frequency, Hertz 2009  Words | 6  Pages

  • Analysis of Plant Pigment

    Experiment 5 Analysis of Plant Pigment Purpose: Chromatography is used for separation. In this case the separation of plant pigments. After placing the plant sample in the column the separation will be easy to see and the samples will be analyzed using VIS spectrophotometry. This is used to isolate and identify the different lipids causing the different pigmentations. Introduction: Lipids are chemically diverse substances found in cells. Lipids are water-insoluble, structural components...

    Biological pigment, Chlorophyll, Chromatography 1096  Words | 4  Pages

  • Lab report for chromatography,international baccalaureate programme

    QUESTION:_ What is chromatography? How many pigments are there in a plant? How the different pigments in a plant can be separated? _APPARATUS_ : Please refer to the handout _MATERIAL_ : Please refer to the handout _METHOD_ : Please refer to the handout _DATA COLLECTION_: Coloured band Pigment front distance (± 0.05cm) Solvent front distance (± 0.05cm) Green 11.7 13.0 Yellow 12.5 13.0 _DATA PROCESSING_: Coloured band Pigment Ratio of fronts Green Chlorophyll _b_...

    Analytical chemistry, Chlorophyll, Chromatography 584  Words | 4  Pages

  • X-Ray Absorption Spectroscopy

    X-ray Absorption Spectroscopy X-ray absorption spectroscopy (XAS) techniques probe short- and medium-range order, yielding information on bond lengths, coordination numbers, local coordination geometry and the oxidation state of atoms for a wide range of solid and liquid systems. XAS experiments require an intense, tunable photon source only available at synchrotrons. Features • medium and high energy (from atomic number Z=20 upwards) XAS, XANES (x-ray absorption near-edge structure)...

    Absorption spectroscopy, Chemistry, Coordination number 781  Words | 2  Pages

  • Photosynthesis in Non-Green Plants

    sequence of pigments which have the ability to absorb visible light. The most vital pigments are chlorophylls which are green in colour. From this it can be concluded that green plants contain chlorophyll. However, plants of other colours, such as red, still have the ability to photosynthesis; therefore other pigments must be involved in the process of photosynthesis. The aim of this investigation was to determine whether or not there is a difference between the combinations of pigments in red leaves...

    Chlorophyll, Color, Electromagnetic spectrum 1302  Words | 5  Pages

  • Absorption Spectroscopy - Essay

    Absorption Spectroscopy Abstract: Absorption spectroscopy validated Beer-Lambert’s Law, confirming Beer-Lambert’s Law was a successful method in determining the molar concentration of a sample within a composition that is unidentified. Absorption spectroscopy is used in order to determine the ε value; ε was calculated to be .0566. Introduction: The purpose of the Absorption Spectroscopy experiment is to evaluate the reliability and accuracy...

    Absorbance, Absorption, Chemistry 845  Words | 3  Pages

  • Paint Pigment

    The History of Paint Pigments Chem 111-404 April 24, 2013 Introduction: This report expresses five different pigments that were formed during chemical reactions. Three out of the total five reactions went through a metathesis, or double-replacment reaction. A metathesis reaction can be defined as “a chemical reaction in which an element or radical in one compound exchanges places with another element or radical in another compound.” (Webster). The other two pigments underwent a neutralization...

    Acrylic paint, Chemical reaction, Chemical reactions 1449  Words | 5  Pages

  • separation of leaves pigment

    Tittle: Separation of leaves pigment. Introduction The photosynthetic pigment is used to absorb light during the process of photosynthesis. There are five pigments usually found in spinach leaves: Carotene (yellow), Phaeophytin (yellow-grey), Xanthophyll (yellow-brown), Chlorophyll a (blue-green), Chlorophyll b(green). Photosynthetic pigment is located in the chloroplast of the leaf. The function of chlorophyll a and chlorophyll b is to trap red and blue violet light when they carry out photosynthesis...

    Carotene, Chlorophyll, Oxygen 694  Words | 3  Pages

  • Cyclohexanone: Infrared Spectrum

    separation and purification, an Infrared Spectrum will be run to determine the composition of the recovered material. Infrared Spectroscopy is a very powerful technique used in the determination of molecular structure and the identification of unknown organic materials. The infrared spectrum yields direct information about the presence or absence of key functional groups. "The region of the infrared spectrum which is of greatest interest to organic...

    Carbon dioxide, Electromagnetic radiation, Infrared 954  Words | 4  Pages

  • Beetroot Pigment

    BEETROOT PIGMENTS - and membranes – These pigments are betalain pigments (not, as often thought, anthocyanins), which they replace in some organisms. They are named after the Beet family of plants (Beta) but are also found in fungi (Fly Agaric - the red, spotted one!). In petals they presumably attract pollinating insects and may be present in seeds/fruits to encourage birds to eat them and so disperse the seeds. Man has selected for colour in beetroot, both because...

    Anthocyanin, Betalain, Cell 1093  Words | 4  Pages

  • The electromagnetic spectrum

    INTRODUCTION: The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. Radiation can be said to be energy that travels and spread as it goes. The "electromagnetic spectrum" of an object has a different meaning, and is instead the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. We tend to witness different radiations of the electromagnetic spectrum without knowing, example is the visible light that...

    Electromagnetic radiation, Electromagnetic spectrum, Infrared 1611  Words | 6  Pages

  • Electromagnetic Spectrum

    The electromagnetic spectrum is made up of six different types of waves. Radio waves, Microwaves, Infrared waves, Visible light, Ultraviolet light, X-rays and Gamma rays. The radio waves are used to transmit radio and television signals. The infrared waves are used to tell temperature of areas. Visible light is all the colors that we can see. Ultraviolet light can help things grow but to much can cause diseases such as skin cancer. X-rays are used as a tool to find broken bones or take...

    Electromagnetic radiation, Electromagnetic spectrum, Infrared 2258  Words | 7  Pages

  • Results and Discussion Example

    chlorophyll a, chlorophyll b, xanthophyll, and beta-carotene in a tube of blended leaf extract. We recorded our findings on the table labeled table 1. Table 1 shows the transmittance at each wavelength on a table from 400 to 720. The information on Figure 1 came from the leaf extract on the paper chromatography that we used; with the help of acetone we saw the spectrum and the differences of the different pigments. Percentage transmittance in Table 1 show that the lower the number, the more dense...

    496, Chemistry, Chlorophyll 1029  Words | 3  Pages

  • Photosynthetic Pigments

    REPORT NAME :princess cucumber TOPIC : 3.8 & 8.2 : PHOTOSYNTHETIC PIGMENTS RESEARCH QUESTION INTRODUCTION The photosynthetic pigments are responsible for absorbing and trapping light energy the major pigments of photosynthesis are the chlorophylls. The two chlorophylls found in green plants are chlorophyll a and chlorophyll b. other pigments include carotenoids and phycobilins, sometimes referred to as accessory pigments. Carotenoids occur in all photosynthetic organisms, while phycobilins...

    Chlorophyll, Molcajete, Mortar and pestle 629  Words | 3  Pages

  • Leaf Disc Experiment

    stage and the dark (light independent) stage. The light energy is used to split water molecules, and all the colours of while light are absorbed by pigments in the chloroplasts (chlorophyll-containing plastid found in algal and green plant cell). The breakup of water releases oxygen electrons, and protons: Electrons move to the chlorophyll (green pigment) while protons are stored in the chloroplast and the oxygen is used for aerobic respiration for the plant or ejected into the atmosphere. The high...

    Adenosine triphosphate, Carbon dioxide, Eucalyptus 1106  Words | 4  Pages

  • Absorption and Variable Costing,

    Absorption and Variable Costing, Inventory Management Absorption and Variable costing are very important tools for cost accounting. Both of these costing methods allow you to see the cost of your inventory, in a different way. For example the absorption method allows you to assign all costs to the product, while variable costing allows only variable costs to be assigned to the product. Inventory management is extremely important as well because it ties into efficiency and lowering your costs...

    Cost, Costs, Equals sign 1600  Words | 5  Pages

  • Absorption Costing

    Absorption Costing -Overview 1. Overview of Absorption costing and Variable Costing 2. Review how costs for Manufacturing are transferred to the product 3. Job Order Vs. Process Costing 4. Overhead Application -Under applied Overhead -Over applied overhead 5. Problems with Absorption Costing 6. Concluding Comments Absorption Costing The focus of this class is on how to allocate manufacturing costs to the product. -Direct Materials -Direct Labor -Overhead Absorption...

    Cost, Costs, Expense 975  Words | 5  Pages

  • "Artificial Leaf" Research Paper

    Recent Breakthrough - “Artificial Leaf” In the past 3 million years, the levels of atmospheric carbon dioxide have been at their highest ever. With the more relatively recent beginning of the Industrial Age, the amount of clean, breathable air that humanity depends upon for survival, has, as a response to the Era, decreased. The increase in carbon emissions and the increasing dependence upon fossil-fuels for energy has led to a global race for the creation of a carbon-neutral, renewable energy...

    Carbon dioxide, Energy, Fossil fuel 1146  Words | 3  Pages

  • Elodea Lab

    Paper chromatography, which is a useful technique for separating and identifying pigments and  other molecules from cell extracts that contain a complex mixture of molecules. The solvent  moves up the paper by capillary action, which occurs as a result of the attraction of solvent  molecules to the paper and the attraction of solvent molecules to one another. As the solvent  moves up the paper, it carries along any substances dissolved in it. The pigments are carried  along at different rates because they are not e...

    Cyan, Magenta, Red 1281  Words | 4  Pages

  • The effects of Light Quality on the Rate of Photosynthesis Measure through Floating Spinach Disks

    Abstract This study was undertaken to determine the relationship of different wavelengths of light and the rate of photosynthesis in spinach leafs. The rate of photosynthesis was measured every five min under light colors of white, green, red, blue and yellow under a light intensity of 2000 lux. The rate of photosynthesis was measured by the spinach disk method in which we replaced the air from the disks with sodium bicarbonate using a vacuum. Under photosynthesis, oxygen, a product of photosynthesis...

    Chlorophyll, Chloroplast, Color 2388  Words | 7  Pages

  • Absorption Spectroscopy

    Abstract: This experiment explores the technique of absorption spectroscopy. The procedures deal with the wavelengths and absorption of dyes in a sample of grape Kool-aid. The use of Beer's Law helps to determine values of absorption. Introduction: This experiment demonstrates another technique used in the analysis molecules with light. The study of light absorbed my molecules is known as absorption spectroscopy. This is very easily the opposite of emission spectroscopy because it occurs when...

    Absorption spectroscopy, Atom, Chemistry 565  Words | 3  Pages

  • maple leaf

    Paragraph 1 Maple Leaf Foods Inc., headquarters is in Toronto, Ontario, Canada, and operates through 3 segments, Meat Products Group, Agribusiness Group, and Bakery Products Group. Making the company that of a diversified one. The Meat Products group offers processed packaged meats, which sells the products to its retail, foodservice, industrial and convenience channels, under the brand name of Maple Leaf Foods, or Schneiders. The Agribusiness Group engages in the animal by-products recycling...

    Brand, Brand management, Food 2789  Words | 7  Pages

  • Gas Absorption

    Name: Pekshna Kisto ID: 1011902 Chemical & Environmental Engineering Gas Absorption Assignment 1: Give one industrial scale example where gas absorption is used? Gas absorption is a process whereby a contaminant (gas or vapour) is removed from air or another gaseous stream by contact with a flowing liquid phase. In oder to increase the surface area available for mass transfer, the operation is almost always conducted inside a tower or column packed with a bed of high surface area filling material...

    Chemical engineering, Fluid dynamics, Gas 798  Words | 3  Pages

  • The Last Leaf

    The Last Leaf (by O. Henry) Analysis O. Henry is one of the most famous American short story writers. His real name was William Sydney Porter and he was born on September 11, 1862. In 1894 was accused of stealing money and went to prison. While in prison Porter first started to write short stories. After Porter was released, he changed his name to O. Henry and published his stories in magazines. O. Henry’s short stories are famous for their surprise endings and humor. O. Henry's wrote such classic...

    Fiction, Guy de Maupassant, Leaf 936  Words | 3  Pages

  • Pigment and Vermeer

    final surface for painting used by painters to create a smooth, impermeable layer on which to paint (two layers of ground were often applied by Dutch artists to create this final surface). Generally, the first coat consisted of a mixture of earth pigments, palette scrapings or the sediments from the jar used to clean brushes. This mixture produced a dirty gray substance; its sole purpose was to provide a smooth surface economically. The second layer of ground, or imprimatura, usually consisted of...

    Baroque painting, Delft, History of painting 2383  Words | 7  Pages

  • The Artificial Leaf

    Introducing the Latest High Tech Invention…The Leaf General Purpose: To inform Specific Purpose: The purpose of this presentation is to inform the audience of the invention of the Artificial Leaf and its potential applications. Introduction I. Efficient and affordable if not free “green energy” is something sought after by scientists, eco-conscious individuals, organizations, and consumers alike. A. Some of these concepts are already well known. Solar, wind, and water driven technologies...

    American Chemical Society, Chemical reaction, Cogeneration 959  Words | 3  Pages

  • Instructions for Conducting a Photosynthesis Experiment in a Laboratory

    form, photosynthesis captures the energy of sunlight and uses this to drive the formation of carbohydrates. Plant Pigments Absorption of light energy in plants is made possible by the presence of pigments. Plants typically appear green to the human eye. This results from the reflection or transmission of green light from the pigments chlorophyll a and chlorophyll b. Other pigments, the carotenoids and xanthophylls, also participate in photosynthesis and these may appear yellow or orange to the...

    Chlorophyll, Chromatography, Electromagnetic radiation 2005  Words | 7  Pages

  • Electro Magnetic Spectrum

    on Earth has evolved to us life to its advantage to survive. If you were to take a prism and put light to it, it can slow light down by a fraction by revealing its much more colourful side. This is commonly known as the visible light spectrum. On one end of the spectrum you have red and on the other you have Violet. Red is red because its wavelengths are larger and has a larger Frequency. A frequency is the level of energy is it giving off and is determined by its wavelength, the larger the wavelength...

    Electromagnetic radiation, Electromagnetic spectrum, Frequency 1845  Words | 5  Pages

  • Absorption Costing

    Absorption costing: * It is costing system which treats all manufacturing costs including both the fixed and variable costs as product costs * In absorption costing, all costs are absorbed into production and thus operating statements do not distinguish between fixed and variable costs. * Absorption costing is a process of tracing the variable costs of production and the fixed costs of production to the product. Absorption costing is used to cost products and to report financial...

    Activity-based costing, Costs, Management accounting 1207  Words | 4  Pages

  • The Last Leaf

    The Last Leaf In his wonderful short-story The Last Leaf, O.Henry depicts a really admirable person - old Behrman. The story depicts the lives of artists in America at the turn of the 19th and 20th centuries. At that time arts people were massively settling in Greenwich Village attracted by eighteen century gables, Dutch attics and low rents, making this district an arts hub of this huge city. Two young artists Sue and Johnsy meet at a café. They become friends and find their tastes and opinions...

    Illness, Patient 1339  Words | 4  Pages

  • The Last Leaf

    September 30, 2012 Free wright over the last leaf The last leaf by O henry is a story work that is primarily about two artist that live in an art colony that live together and one falls ill with pneumonia. The disease ravages her and is close to taking her life so she builds a time line for her death of the falling of the leaves and says when the last one falls I shall die. Then when there was only one leaf left a horrible storm blew in but in the morning the leaf was still there then main character started...

    A Story, Doctor 1543  Words | 4  Pages

  • Alcohol and Ir Spectrum

    Abstract: In this experiment the conversion of alcohols to alkyl halides are investigated through reflux and simple distillation. These are common procedures used to separate substances. After the reflux and distillation is complete 13C NMR and IR spectrum is used to identify the product or products for each reaction: 1a, 1b, and 2. Every individual in the group was assigned either 1a (1-propanol) or 1b (2-pentanol), and 2 (1,4-dimethyl-3-pentanol). The purpose of this experiment was to understand...

    Alcohol, Carbon, Elimination reaction 1927  Words | 6  Pages

  • Photosynthesis Lab

    Photosynthesis Lab Data Collection: The absorption of different wavelengths of light by Chlorophyll Wavelength (nm) Absorbance of light by chlorophyll (Arbitrary units) Diluted Calculation New Reading (Arbitrary units) Violet 430 2.35 50% 2.35 x 2 3.20 Blue 470 1.09 - - 1.09 Blue-Green 492 0.38 - - 0.38 Green 520 0.77 - - 0.77 Yellow-Green 550 0.85 - - 0.85 Yellow 580 1.43 - - 1.43 Orange 600 0.65 - - 0.65 Red 700 0.16 - - 0.16 Absorption and reflection of light: Different substances...

    Absorption, Color, Digestion 733  Words | 3  Pages

  • absorption of drug

    these cells in order to be absorbed into the circulatory system. One particular cellular barrier that may prevent absorption of a given drug is the cell membrane. Cell membranes are essentially lipid bilayers which form a semipermeable membrane. Pure lipid bilayers are generally permeable only to small, uncharged solutes. Hence, whether or not a molecule is ionized will affect its absorption, since ionic molecules are charged. Solubility favors charged species, and permeability favors neutral species...

    Cell membrane, Chemical compound, Chemistry 816  Words | 3  Pages

  • Absorption Spectra

    Introduction At any particular wavelength the absorption of light when visible light passes through a solution depends on two factors: * The length of the light path * The concentration of the colored path The connection of these two variables is known as the Beer-Lambert Law: Absorbance (A) = ε c l Where ε is the absorption coefficient C is the concentration of the compound And l is the length of light usually 1cm When I is constant, this proves a linear relationship between...

    175, Absorbance, Absorption 957  Words | 6  Pages

  • The Electromagnetic Spectrum

    The Electromagnetic Spectrum Introduction In the electromagnetic spectrum there are 7 main types of radiation – Radio Waves, Microwaves, Infra-red, Visible Light, Ultra-violet, X-rays and Gamma Rays. These waves do not transfer matter – the energy they transfer depends on the wavelength of waves. This is why waves have different effects (like the intensities of Ultra-violet radiation compared to that of Visible Light – although next to each other on the spectrum, UV light can damage your skin...

    Electromagnetic radiation, Electromagnetic spectrum, Frequency 641  Words | 3  Pages

  • Nissan Leaf

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