Respirometer experiment with maggots

Investigating respiration of maggots Example Graduatewa

  1. As temperature is a variable in my experiment, I must make sure the temperature of the maggots remains constant throughout the experiments. I will vary the temperature from 10 degrees Celsius to 60 degrees Celsius in 10*c intervals. - Mass of Maggots- Clearly more maggots means more respiration, and therefore more oxygen is consumed
  2. g them] 3
  3. ating peas. A respirometer
  4. Experiment can be carried out with plastic beads in the tube as a negative control (as plastic beads shouldn't respire). Respirometer. Method. Place 5g of the organism (maggots) into the tube and replace the bung. Isolate the respirometer by closing the connection to the syringe and the atmosphere and immediately start the stopwatch

Core practical 9: Investigate factors affecting the rate

Respirometer - Designing an experiment to show different

  1. Assessing the ethics of scientific research: the use of invertebrates in respirometers has ethical implications. The use of animal models in biological experiments has a long history. Indeed, many of our most important discoveries were made possible by using animal test subjects. However, using animals at any time during an experiment has ethical implications tha
  2. Set up the respirometer in the way that has been shown in the diagram above. The syringe is used to pull up the coloured liquid through the capillary tube. Make sure the 3 way tap is closed after by making sure the little arrows are pointing left, up and right. The known mass of 5 groups of maggots needs to be exposed to to 17, 26, 30, 40 and.
  3. ating peas in the respirometer vial(s) 1. Place 25 dry peas and beads in your respirometer vial(s) 2. Place beads only in your respirometer vial(s) 3. Insert stopper fitted with a calibrated pipet into each respirometer vial. The stopper must fit tightly. If the respirometers leak during the experiment, you will have to start over
  4. An experiment to measure the rate of aerobic respiration of woodlice using a respirometer. Simple calorimetry experiment to measure the release of energy on burning foods like fats. You can do this experiment with animals like woodlice or maggots, using glass beads in the control tube - NOT dead animals and the living animals should not be.
  5. Using a respirometer to measure the rate of uptake of oxygen The organisms to be investigated are placed in one tube, and non-living material of the same mass in the other tube. Soda lime is placed in each tube, to absorb all carbon dioxide. Cotton wool prevents contact of the soda lime with the organisms
  6. utes. Before beginning the experiment, be sure that the dye in the pipette is in a region of the pipette that has calibration marks

A group of students set up a simple respirometer, as shown in Fig. 1.1, and used it to determine the rate of Identify one variable that had not been controlled in this experiment and suggest an improvement to control that variable. The student planned to allow yeast cells and maggots to respire the cookie powder in anaerobic conditions an Considering this, why is soda lime used in respiration experiments? In the experiment for respiration in biology , the main aim is to show that plants release carbon dioxide ( CO2 ) while respiring .soda lime absorbs carbon dioxide and turns milky. One may also ask, why do we use Respirometer? A respirometer is a device used to measure the rate of respiration of a living organism by. How to set up and use respirometers to measure aerobic respiration in small invertebrates The respirometer with just the glass beads will allow changes in volume due to changes in atmospheric pressure or temperature changes. in the laboratory experiment, you will use peas. Remember, cellular respiration occurs in the cells of both animals and plants! Whilst maggots are obviously not human beings,.

A description of the use of the respirometer to measure oxygen consumption by respiring organisms. The focus is on setting up the experiment rather than on t.. A respirometer is a device used to measure the rate of respiration of a living organism by measuring its rate of exchange of oxygen and/or carbon dioxide. They allow investigation into how factors such as age, or chemicals affect the rate of respiration. The oxygen uptake is detected by manometry The respirometer can show the: volume of oxygen that has been inspired/consumed by an organism Volume of carbon dioxide expired/produced by the organism If soda lime is removed from the right tube, and the experiment repeated, then CO2 from the maggots will be placed back into the environmen Respiration of maggots Introduction. Aerobic respiration is the process in which glucose and oxygen, through the action of enzymes in mitochondria, produce carbon dioxide, water and lots of energy. In this experiment the use of oxygen in the aerobic respiration of maggots can be seen in that, in a sealed container, the level of oxygen reduces with time A very simple respirometer 4 Design an experiment to investigate the effect of different temperatures on the rate of oxygen uptake in maggots. Remember that the maggots will need time to acclimatise to each new temperature. soda lime wire mesh organism to be studied capillary tube drop of liquid 2 of 2 Student

Assemble the respirometer (see diagram below).Clamp the syringe and the respirometer in position when in use; Place as known mass of one type of organism into the boiling tube (i.e. 10 maggots) Place a drop of coloured fluid at the open end of the glass tube using a 1cm3 pipette. Open the connection between the syringe and the respirometer Soda lime is highly corrosive so eye protection should be worn at all times and contact with the soda lime should be avoided. A spatula should be used to handle it. After handling the maggots you should wash your hand thoroughly. Procedure: Set up the Respirometer as shown in the diagram to the righ Respirometer Coloured liquid 5g Organisms e.g. maggots, germinating peas, woodlice Cotton wool Stop clock Marker pen Place 5g of organism (maggots) into the tube and replace the bung. Introduce a drop of dye into the glass tube. Open the connection (three-way tap) to the syringe and move the fluid to a convenient place on the pipette (i.e.

Core practical - Investigate respiration rate in living

6. Experiment to demonstrate the following in plant respiration by using retort method: 7. Experiment to determine the Respiratory Quotient (R.Q.) value of the following respiratory substrates with the help of Ganong's respirometer: 8. Experiment to measure the respiratory quotient (R.Q.) by means of a pair of respiroscopes: 9 A respirometer consists of two test tubes, an experimental test tube and a control tube, and a capillary U-tube. this is ok because the experiment will take place in the same room all of the time. * 8 maggots * Glass beads * 2 small pieces of wire gauze * 1 screw clip * 1 three way ta Clamp the syringe and respirometer into position. Place 10 maggots into the boiling tube. Handle them with care to avoid harming them. Put the boiling tube into the water bath and allow for maggots to become acclimatised to this temperature for a few minutes before starting the experiment The experiment can be conveniently performed by Ganong's respirometer described in Expt. 4. The manometer tube and reservoir are filled with brine solution (saturated NaCl solution) and by adjusting the reservoir, the surface of the brine solution is brought to 100 ml mark of manometer

Measuring The Rate Of Oxygen Uptake - Snab Biolog

  1. -I. Show your working. The internal diameter of the glass tubing is 2mm. rah volume of a cylinder (r = radius, h distance) 3.14 Answer . mm3
  2. ating seeds use oxygen and the pressure reduces in tube A so the manometer level nearest to the seeds rises
  3. The first few questions deal with causes of pressure changes inside a respirometer tube and predicting the direction in which fluid within a manometer tube would flow. The worksheet then moves on to cover two different investigations - measuring the amount of oxygen consumed over time and measuring the amount of carbon dioxide produced over time
  4. To run the experiment, place the plastic boiling tube with the maggots inside the boiling tube and seal the respirometer in place. Place the end of the respirometer into the small bottle of food colouring, squeezing the rubber stopper down to see a few bubbles come from the bottom - the liquid will most likely rise up into the tube immediately
  5. utes. Subtract the final value from the first.
  6. Lab 5 Cellular Respiration Introduction Cellular respiration is the procedure of changing the chemical energy of organic molecules into a type that can be used by organisms. Glucose may be oxidized completely if an adequate amount of oxygen is present. Equation For Cellular Respiration C6H12O6 + 6O2 -> 6CO2 + 6H2O + energy Carbon Continue reading Lab 5 Cellular Respiration by Kris Layhe

A respirometer is a device used to measure the rate of respiration of a living organism by measuring its rate of exchange of oxygen and/or carbon dioxide. They allow investigation into how factors such as age, or chemicals affect the rate of respiration. Respirometers are designed to measure respiration either on the level of a whole animal or plant or on the cellular level (c) A respirometer is shown in Fig. 5.2. It can be used to estimate an organism's rate of respiration. 8 7 6 5 4 3 2 1 0 droplet of oil wire mesh water-bath soda lime fly larvae Fig. 5.2 (i) Complete the sentences: A respirometer can be used to calculate the.. of oxygen used by th This experiment relates to Big Idea number 2: Biological systems utilize free energy and molecular building blocks to grow, to reproduce, and to maintain dynamic equilibrium. The purpose of this procedure was to remove all oxygen in the plant cells, and replace it with water or a sodium bicarbonate solution, and to watch how the cell uses light.

The experiments included are as follows: 1 To find the percentage of water in a sample of soil. 100g soil is oven-dried or air-dried and the loss of weight found. 2 To find the percentage of organic matter in a sample of soil. 50g dry soil is strongly heated by a Bunsen burner to ignite the organic matter A respirometer is an apparatus for measuring the amounts of gases used in respiration. There are many forms, but most consist of an air-filled chamber in which living tissue is placed, along with a substance to absorb gases, to which is attached a tube along which a liquid flows to show changes in the volume of the apparatus

Start studying Core practical 9: Investigate factors affecting the rate of aerobic respiration using a respirometer. Learn vocabulary, terms, and more with flashcards, games, and other study tools can be estimated from the results obtained with a closed-vessel respirometer (as opposed to a constant-flow device) by increasing the measured respiration rate by a factor of about x 2.5. INTRODUCTION unfortunate because, in most experiments, laboratory In the past 15 years many ecologists have realised determinations of the amount of energy. For each group of students: Respirometer, 1 (Note 1)This is comprised of: two boiling tubes, one basket or cage (metal or plastic), one 1 cm 3 syringe, two bungs (1-holed if using 3-way taps, 2-holed if these are not available), and one manometer (a capillary U-tube fixed to a scale on a board and filled with coloured oil - Note 2). Potassium hydroxide solution, 15% (= 2.7 M), about 15 cm 3. Set up the respirometer in the way that has been shown in the diagram above. The syringe is used to pull up the coloured liquid through the capillary tube. Make sure the 3 way tap is closed after by making sure the little arrows are pointing left, up and right. The known mass of 5 groups of maggots needs to be exposed to to 17, 26, 30, 40 and.

Measure the clear zones 14 Place agar plates upside-down Use - Ruler to measure diameter of clear zone if perfect circle - Graph paper to count number of squares on graph paper Report 12 results in a table Repeats: 1. take out anomalies 2. calculate mean value 3. calculate standard deviation Report 13 data in a graph Disks soaked with. The experiment The response time of the oxygen sensor was less than was conducted under a Home Office licence. 0.2 s and the lag time of the respirometer and tubing was For the experiment, we placed the subject bird on the 3.0 s Experiment: Yeast cells in the pellet medium were counted using a haemocytometer. Once the cell count was confirmed, we carried out the experiment by loading pellet medium into the respirometer. First, the larger test tube was filled with pellet medium until it was 3/4 full. Then, a smaller inverted test tube was placed inside the larger test tube

Video: #96 Using respirometers Biology Notes for A leve

Respirometer Experiments and Ethics (2016) IB BiologyA level biology - Blog

Experiment #1 Below is a diagram of a respirometer, an instrument for measure carbon dioxide production. To measure oxygen consumption by a mouse, we will use a piece of equipment called a respirometer. out carbon dioxide. Question 1 1 out of 1 points How is a respirometer used to measure fermentation in the Cellular Respiration experiment Photograph of a physicist monitoring a complex experiment using a closed respirometer. A respirometer is a general term that encompasses a number of techniques for obtaining estimates of the rates of metabolism of vertebrates, invertebrates, plants, tissues, cells, or microorganisms via an indirect measure of heat production Experiments can produce valuable insights if a hypothesis is clearly formulated and variables are carefully controlled across treatments. Subject. Biology, Environmental Science, Botany or Ecology. Audience: 9-12 grade. Time required: 2-3 periods. Background . In some respects, plants are not that different from people

Each respirometer was also connected to a flush system (c. 50 l h −1 per respirometer) regulated by a timer, where flushing occurred for 20 min every 40 min and excess water flowed out of an elbow fitting in the lid of the respirometer that extended above the water surface of the reservoir bath. As with the outlet tube on the recirculation. Since the peas and maggots used in this experiment are living things, they could affect the result since they both expire aerobically and take part in metabolism. With respiration of carbohydrates, the food is then converted to carbohydrates usually hexose sugar before being respired The Effect of Germination on the Oxygen Consumption of Mung Beans Research Question: Which Type of Mung Bean Can Consume the Most Oxygen: Most Germinated (5 days), Half Germinated (3 days), Or Non- Germinated (0 days)? Background Research Variables - Cellular respiration is The Q-Box AQUA Aquatic Respirometry Package is designed for measurements of metabolic rate (VO2) as reduction in Dissolved Oxygen inside the respirometry chamber with an aquatic animal. Both vertebrates and invertebrates may be studied. Q-Box AQUA uses the principle of intermittent flow respirometry. Up to 4 aquatic chambers/samples may be monitored in a single experiments with additional.

CPAC 9: Investigation into how temperature affects the

This experiment was setup to investigate the effects of temperature on the rate of respiration of blowfly larvae. Background Knowledge The maggots involved in this investigation were blowflies at the larval stage of development, and they breathe through spiracles in the anterior and posterior segments. * Respirometer (already assembled. The Columbus Instruments' Micro-Oxymax system is a highly adaptable general purpose closed circuit respirometer. The system monitors the concentration of gas contained within an enclosed head space into which the material being monitored is respiring The rubber stopper was equipped with a 1ml pipet and a syringe that helped regulate air pressure without allowing air into or out of the tube, as in a closed system (Danyk, 2012). Before the experiment could begin, several steps were taken. In the respirometer, the pipet space was sealed with a drop of 10% KOH, using a dropper In the swimming respirometer, the total metabolic rate of unfed larvae was lower than the total rate of fed larvae, in which the total rate increased with increasing ration. The swimming respirometer experiments suggested that the costs of digestion and activity have their own basal requirements and are at least to some extent independent There are nearly 8,000 types of amphibians, including some of the most unusual and exciting creatures found on land and water. About two million species of animals inhabit Planet Earth. More than that, scientists discover and categorize about 10,000 other new species every year

2.8 Respiration and Ethics - The nature of scienc

include experiments and investigations based on the AS syllabus. 23 12 4 2 hours (100 marks) Structured questions, totalling 85 marks plus one free response question that carries a further 15 marks. Based on the A Level syllabus, but a knowledge of the AS syllabus is required. -38 5 1 hour 15 minutes (30 marks 5. What percentage of adenine molecules is present in a DNA molecule of 2000 bases, if 400 of the base molecules are cytosine? A 20% B 30% C 40% D 60 So pressure in the maggots' chamber decreases, causing air to be drawn into the chamber, and therefore displacing the fluid. This double chambered respirometer, allows you to measure the pressure changes, due to the presence of a control tube. The rate of oxygen intake is measured by recording the distance the dye moves up the scale

When the respirometer is 'closed' the living organisms, for example germinating peas, maggots, respire taking in oxygen from within the system. The carbon dioxide produced is absorbed by the potassium hydroxide. The consequent reduction in pressure causes the liquid / dye in the respirometer to move in the direction of the biological material The apparatus shown below is a simple respirometer. Potassium hydroxide absorbs carbon dioxide. Maggots Coloured liquid Gauze Cotton wool soaked with potassium hydroxide Scaled capillary tube (a) Describe how this apparatus could be used to calculate the RQ value of these maggots. ____ follows. Place each respirometer in a water bath and keep the water baths at the allocated temperature (e.g. using ice and hot water or a hot plate). After leaving the respirometers 10 minutes to acclimatise, take measurements of oxygen consumption every 5 minutes for 20 minutes. Changes in temperature during the experiment will cause the gas.

Investigation How Temperature Affects the Rate of

The oxygen consumption experiments were carried out on fish produced in the hatchery of the Universidad Arturo Prat in Iquique, Chile. The oxygen consumption rate under routine metabolism was measured using a respirometer (Fig. 1). The system consisted of a respirometry chamber 18.8 L where fish were stocked. The readings of the variations o With a specially made electrolytic respirometer, the author studied the oxygen consumption of freshly collected whole colonies of Cubitermes exiguus.By uninterrupted measurements at 30°C during 3 days, he observed the existence of a circadian rhythm of oxygen consumption; the recorded curve shows two maxima, one in the evening and one in the morning, and two minima, the first at midnight and. Learners need to understand how a respirometer works so a preliminary discussion is needed to encourage learners to think of a respirometer as a closed air-tight system from which the test organisms take oxygen and release carbon dioxide. The experiment provides an opportunity for discussion about the reliability of the results in relation.

SNAB Biology Topic 7 - NEW - Revision Cards in A Level and

There is a syllabus point in the iGCSE Respiration section that asks candidates to know about an experiment that demonstrates heat production in respiration. This must be one of the least interesting experiments ever devised but here goes..... Respiration is the chemical process occurring in all cells in which food molecules are oxidised to releas 1. Run the experiment with all 4 of the available plants in each condition. (You can click and drag the plants and equipment to the front table) 2. Click on the timer to run the experiment 3. Record the results in a table. When you have finished collecting results, answer these questions: 1 Prior to the commencement of each experiment, each ammocoete was gently rolled in absorbent paper and weighed to the nearest 0.01 g. The mean weight ± SEM of the ammocoetes used for the experiments was 1.84 ± 0.11 g. Each ammocoete was placed in the animal chamber of the respirometer for 18 hr before starting to measure its rates of gas exchange Before you begin, review the experiment, write your hypothesis on your worksheet, and identify the independent and dependent variables as well as the control. Tube #1 Tube #2 Tube #3 Water 8 ml 6 ml 4 ml Yeast 0 ml 2 ml 4 ml Corn syrup 4 ml 4 ml 4 ml TOTAL 12 ml 12 ml 12 ml 1. Once. Improvements to any experiment to increase validity of results more intermediates in concentrations, 15 of 18. One problem of measuring the anaerobic respiration rate with a respirometer of yeast and maggots. Maggots do not produce CO2 in lactate fermentation, yeast do produce CO2 in alcoholic fermentation so the respiratory quotient is.

respirometer is, under the conditions reported here, about 100-fold more sensitive than the more widely used POS respirometer. Hence, the number of animals used in experiments can be drastically reduced (e.g. to 1-4larvaeml21). Finally, coulometric respirometry allows for the measurement of metabolic rates over developmentall The larger the inhibition zone, the more effective the antibiotic incubator against that species.Measuring the rate No of Respirometer Place 5g of organism (maggots) into the tube and replace the bung. Introduce a drop of dye into the glass tube respirometer (MIFR) that functions in a similar fashion to the computer-controlled static respirometers used with fish (re-viewed in Refs. 5, 40). Our MIFR acts as a closed system during the MO2 measuring phase, but then uses a manually controlled gravity-fed system that allows seawater exchange without damaging the enclosed larvae respirometer is placed in a water bath to control temperature. A control respirome-ter, without animals, is placed alongside. Any changes in volume in the control respi-rometer are due to temperature or pressure change and are subtracted from the test re-sults to correct them. Procedures 1. Work in groups of 4. Discuss the prin

Measuring Respiration of Germinating and Nongerminating Pea

chambers of the respirometer. After each experiment the animals were anaesthetized in MS. 222 (Sandoz), dried by gentle rolling on a piece of absorbent paper to remove surface water, and weighed to the nearest milligram. Respirometer The respirometer (Fig. 1) was mounted on a frame in a constant-temperature room We've worked with experienced teachers and technicians, as well as higher education institutions and learned societies to produce these apparatus set-up guides for each of the required practical activities 1 A respirometer is used to measure the rate of respiration. A simple respirometer is shown below. In a respirometer, changes in the volume of gases in the boiling tube cause the coloured fluid to move in the capillary tubing. The soda lime absorbs carbon dioxide. A student sets up the respirometer using 5 g of maggots The amount of C[O.sub.2] produced in the respirometers containing the polymer and the soil was subtracted from the result obtained in the control respirometer (containing just the soil) in order to yield the amount of C[O.sub.2] and, therefore, the biodegradation degree related only to the polymer sample

A single Rutilus rutilus experiment with similar SMR in a small (RFR = 20:1) respirometer is included for comparison. Due to the overlapping graphics and differences in scaling between the lines. 12 idea of repeating experiment at each temperature, e.g. 20 °C, 30 °C, 40 °C and 50 °C ; A temperatures within the range of 10°C to 50°C 13 low risk experiment or medium risk experiment due to (named) CO2 absorbent harmful and wear gloves ; 14 AVP ; 7 1(c)(i) idea of: find radius of tubing in mm and use πr2 (to find area) The Nuffield Foundation was established in 1943 and aims to improve social well-being by funding research and innovation in education, justice and welfare

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However, Peake and Farrell (2006) think that fatigue involves a behavioral response to respirometer confinement and suspect that experiments using a swim flume tend to underestimate swimming. An Electrode Respirometer for Planktonic Organisms Shigehisa Yamasaki* and Hachiro Hirata* Abstract In order to determine the respiration rates of planktonic organisms, an electrode respirometer was devised. The animal used in this experiment was the mixohaline rotifer, Brachionus plicatilis. Th Setting up Apparatus to measure rate of oxygen uptake = Respirometer / Spirometer Simple to use with small organisms e.g. germinating seeds, maggots Both are very active in respiration Elaborate to use with human NEW & NOTEWORTHY A manual intermittent flow respirometer (MIFR), allowing media exchange in a flow-through cell containing small aquatic organisms, permits repeated measurement of Mo2 of individuals not only in a single medium (e.g., technical replication), but also in different media (here, high CO2-equilibrated seawater), enabling measurement.

After implantation of cannulae the fish was placed in a respirometer through which de-chlorinated and aerated water flowed at a rate between 100-300 ml/min. The water was maintained at 13 + 1 °C and the fish was left to recover for at least 24 h before the start of an experiment. ThOt, PQOe P an,d pH of blood and water were measure From Britannica, ( |https://www.britannica.com/science/detritus ) Detritus is matter composed of leaves and other plant parts, animal remains, waste products, and. where V r is the respirometer volume, V f is the fish volume (often assumed to be the same as M f with 1 g of fish equivalent to 1 ml of water, respiration prior to the introduction of the fish and again after removal of the fish at the conclusion of the experiment. If background respiration proves to be a concern in pilot experiments, the.

To run the experiment, place the end of the respirometer into the small bottle of food colouring. The liquid will rise into the tube. When you are ready to start, mark the level of the liquid with the pen and start the stopwatch. Run the experiment for ten minutes, then mark the final level of the liquid INTRODUCTION. Organismal metabolic rate (M o 2) is an important component of the physiologist's toolbox and is being increasingly used as a measure of whole animal performance and fitness, particularly in a climate change context (5, 13, 29, 30).The rate of aerobic respiration is also fundamental to theoretical aspects of animal biology, such as the metabolic theory of ecology (), and the. Measuring the rate of oxygen uptake A2 Edexcel Biology Xavier DANIEL, Ph.D. Setting up Apparatus to measure rate of oxygen uptake = Respirometer / Spirometer Simple to use with small organisms e.g. germinating seeds, maggots Both are very active in respiration Elaborate to use with humans 19 Cellular Respiration Lab Report Wednesday 8:00 A.M. Lab March 2nd, 2005 I. Introduction In this lab we are measuring the amount of oxygen used in both germinating and non germinating peas. We are measuring the oxygen consumption by taking a reading of a respirometer submerged in two water baths. The first bath will be cold water and the second warm to determine the effect of temperatures on. swimming the respirometer. In every experiment, there was a UV-B expo-sure treatment and a control treatment without UV radiation. Therefore, in the exposure treat-ment the UV lamps were the same as in the rou-tine rate experiments, but in the control treatmen

All experiments were conducted under project number S-024-2005 with the approval of the University of Adelaide Animal Ethics Committee. Swimming respirometer Measurements of M O2 at different swimming velocities were performed in a constant temperature room using an upright Brett-type swimming respirometer (water volume 137 ·l), whic Brine shrimps hatch in salt water that is 2 to 5% salt (optimum 2.8%) and pH 8.5. Oxygen must be present. Light is an added (but not essential) factor for hatching. Datalogging could be used to check that the conditions within each of the treatments are maintained at a constant level. This experiment could be completed by small groups of students A second sample of maggots was used in an experiment to show the effect of different temperatures on respiration. The distance that the drop of coloured liquid moved along the capillary tube was measured over a period of 60 seconds at each temperature. The drop o Problem: Yeasts undergo aerobic cell respiration if there is sufficient oxygen and releases carbon dioxide as a waste product. Yeasts, like any other cells, have an optimum temperature at which they work most efficiently, including the process of cell respiration. This experiment aims to discover the relation between temperature and the carbon dioxide yield o To test the effects of temperature on respiration a respirometer wil be used. A respirometer consists of two test tubes, an experimental test tube and a control tube, and a capillary U-tube . The experimental tube contains soda-lime solution with a wire gauze platform over it, with non-vertebrates in it

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