How can starch be converted into a polymer

1,597 results
  1. Chemistry

    An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis?

  2. Biology

    Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does

  3. Biology

    Your lab group is experimenting with the diffusion of molecules across a membrane. Dialysis tubing is used as a model cell membrane because is it semi-permeable, allowing small molecules to cross the membrane, but NOT larger molecules, like starch. A

  4. Chemistry

    I found the following procedure to prepare starch indicator solution on a website:- To prepare starch indicator solution, add 1 gram of starch (either corn or potato) into 10 mL of distilled water, shake well, and pour into 100 mL of boiling, distilled

  5. Biology

    6. Consider an experiment in which starch is dissolved in a liter of water. Some of the solution is placed into a securely tied dialysis bag. The dialysis bag is placed into a beaker containing distilled water and iodine for 30 minutes. What are the

  6. Chemistry

    If all of the SCN- was not converted completely converted to FeNCS^2+ when the calibration curve was prepared, would this raise or lower the value of Keq? Explain

  7. Chemistry

    An aqueous mixture containing starch, NaCl, glucose and albumin is placed in a dialyzing bag and immersed in distilled water. Which of the following, correctly describes the location of the indicated substance after dialysis? A. albumin, inside B. starch

  8. Biology

    Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does

  9. life sciences

    Grade 11 learners want to investigate which enzyme is responsible for chemical digestion of starch into glucose in humans. They are provided with two different enzymes (carbohydrase and proteases ),starch powder,warm water at about 37 and basic glass

  10. Biology

    In class, I did an experiment with water and iodine solution in a beaker and also starch in a dialysis tube tied and placed in the beaker. There were discussion questions I couldn't answer surely... please check my answers. 1. a)Use your results to

  11. Chemistry

    How would you usually prepare starch indicator solution for iodine titrations? Can the solution be stored for a few months in the fridge? I noticed that sometimes the starch indicator solution in the fridge has turned cloudy, in which case we should

  12. Biology

    Translation is the process by which the sequence (1 point) A. of bases of an mRNA is converted into the sequence of amino acids of a protein. B. of bases of tRNA is converted into cytoplasm before attaching itself to polypeptide. C. of bases of tRNA is

  13. biology

    A solution of the enzyme amylase was added to a solution of starch and kept at 25C. The starch was broken down by hydrolysis. Explain how you would determine the rate of hydrolysis.

  14. Chem

    CH2 = CH - CH - OH ............| ...........CH3 Draw the structure of this polymer and identify the monomer unit. Should show three monomer unit State the type of polymerization involved in forming this polymer Hi Lacey, do you know the answers for part a,

  15. Honors Chemistry

    "Would it be possible to have an addition polymer synthesized from a monomer that has only single bonds? Why or why not?" ==> I know that an addition polymer can only be synthesized from a monomer that has double bonds, but my textbook did not explain why.

  16. Biochemistry

    Amylase is secreted by your pancreas into your small intestine where amylase helps you digest the starches in your diet. Amylase does this because it is an enzyme, a protein that catalyzes a chemical reaction. In this case, amylase catalyzes the breakdown,

  17. Biology- Amylase

    Hello, In our class, we are doing a hypothetical digestion of starch by amylase lab. I do not know where to begin with this following information. If I add Benedict's solution (which I know will change color when the presence of sugar is noted). After all

  18. Chemistry

    An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis?

  19. Solar energy please help

    1-Consider an organic solar cell consisting of a TiO2 semiconductor with an ionization energy 7.8eV and a polymer with an electron affinity 3.4eV. Which of the followning band diagrams corresponds to the organic solar cell. The band gap of TiO2 is 3.5eV.

  20. Chemistry 2

    In a study designed to prepare new gasoline resistant coatings, a polymer chemist dissolves 6.053g of poly in enough water to make 100.0 mL of solution. At 25C, the osmotic pressure of this solution is 0.272 atm. What is the molar mass of the polymer

  21. seventh grade science

    what is a monomer what is a polymer what is the structure of a protein

  22. polymer science

    its possible to convert the commercial polymer into nano polymer and its affact any property of polymer

  23. Science

    By counting the number of H atoms and oxygen atoms in the sucrose. what is the ratio of hydrogen to oxygen? What process would this be called if you had a starch like above and added water to it so it broke down into the simple sugars the starch is made

  24. Chemistry-please help

    What is the purpose of adding zinc chloride in the preparation of starch iodide paste? Please refer to the procedure below: - Starch Iodide Paste- Heat 100mL of water in a 250mL beaker to boiling, add a solution of 0.75g of potassium iodide in 5mL of

  25. Chemistry grd 12

    for the below questions the food samples were onion juice, cornflakes, egg, milk, salad dressing and instant oatmeal. 1) Why are you required to wear safety eye wear and protective clothing while conducting an investigation of testing food samples for

  26. polymerization of alchohol

    CH2=CH-CH-OH | CH3 when the above compound undergo polymerizaing What is the polymer and the structure of the polymer obtained drawing should show three monomer unit. also include what type of polymerization involved in forming this polymer

  27. science - biology

    A photosynthesis experiment uses Chlorella to track the route taken by 14C in photosynthesis. The 14C is provided from CO2 and no new sources of CO2 are available. After the experiment the scientist extracts all of the starch produced and analyses the

  28. chem.

    The combustion of a polymer gives only carbon dioxide and water. Its average molar mass is 10500g/mol and its degree of polymerization is 2500. Determine the molar mass the formula and the name of the monomer. Draw the formula of the polymer what is its

  29. Biology

    I am doing a lab on Dialysis to check if starch moves through the differentially permeable membrane of dialysis tubing.We did this by placing a dialysis tube filled with starch solution into a beaker filled with distilled water and a few drops of iodine. I

  30. chemistry

    Is teflon a dimer? I know that it is an addition polymer, but I don't know if that classifies it as a dimer. No. A dimer is two monomers hooked together. Teflon is a polymer;i.e., many monomers hooked together. I tried to find the molar mass of teflon was

  31. Science

    What building blocks are starches made of? What is the difference between sugar and starch? What term describes the size of a starch? What molecule has to be added to a starch to break it down?

  32. Chemistry

    why does a solution made of starch get thick when heated in water? Is starch insoluable? If it is, would the answer be because the solution just forms complexes of suspended solids which thinken the mixture? Or would it be because granules of starch uncoil

  33. yo help!

    k PGAL may be converted to glucose phosphate right? what other products can be produced???? Glyceraldehyde 3-phosphate can be converted to dihydroxyacetone phosphate, and these two molecules can be joined by aldolase to form fructose 1 ... glyceraldehyde

  34. biology

    the clinitest tablets specifically test for which of the following: starch, hydrogen peroxided, guaicol, peroxidase, or none of the above. Is the answer starch or none of the above?

  35. biology

    14 points Save A photosynthesis experiment uses Chlorella to track the route taken by 14C in photosynthesis. The 14C is provided from CO2 and no new sources of CO2 are available. After the experiment the scientist extracts all of the starch produced and

  36. polymer-Crosslinking Chemistry

    Explain why a polymer such as polybutadiene can be cross-linked, however a polymer such as polyethylene cannot be cross-linked. Make reference to what it is about the chemistry of the repeating units that allows for the formation of cross-links.

  37. chemistry

    A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2

  38. CHEMISTRY: polymers

    Polymethylpentene are there any safety concerns, toxicity concerns about the polymer? any environmently concerns? is the monomer toxic, is the polymer toxic?

  39. science

    Grade 11 learners want to investigate which enzyme is responsible for chemical digestion of starch into glucose in humans. They are provided with two different enzymes(carbohydrase and protease),starch powder,warm water at 37 degrees and basic glass

  40. chemistry

    A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2

  41. Chemistry

    I have one more question DrBob, I have draw a structure of this polymer CH2=CH-CH-OH ' CH3 and identify the monomer units. Would the mononer unit be this: CH2-CH-CH-O ' CH3 AND WOULD THIS POLYMERIZATION BE A CONDENSATION TYPE? Paula--I am not an organic

  42. Chem (monomers)

    Hi I'm having major problems with monomers in proteins. One what is a monomer Two what is it doing in a protien? Much thanks, Rosie A "monomer" is a single unit of a polymer and a polymer is just a bunch of monomers (single units) hooked together. Teflon

  43. chemistry

    A solution prepared by adding 0.17 g of a polymer to 0.6 L of toluene (methylbenzene, a common solvent) showed an osmotic pressure of 0.808 Torr at 21â—¦C. What is the molar mass of the polymer? Answer in units of g/mol.

  44. Chemistry

    In polymer chemistry, it is often said that obtaining a polymer with certain desired physical properties is often more a problem of engineering than of chemistry. Why is this the case? bgfhftghgfgfnhgf

  45. Chemistry

    In polymer chemistry, it is often said that obtaining a polymer with certain desired physical properties is often more a problem of engineering than of chemistry. Why is this the case?

  46. Biochemistry

    Define the structure of starch and the biochemical process of amylase activity on starch basically.

  47. Biology

    what is the relationship between the amount of starch and maltose present during starch hydrolysis.

  48. chemistry

    I submitted this question earlier... can anyone help me pls. This question is about the polymer made by polymerizing this compound: _ CH2=CH-CH-OH _ | _ CH3 Please identify the monomer unit - there should be 3... also, what type of polymerization is

  49. chemistry

    This question is about the polymer made by polymerizing this compound: CH2=CH-CH-OH | CH Please identify the monomer unit - there should be 3... also, what type of polymerization is involved in forming this polymer? sorry - the compound is.... CH2=CH-CH-OH

  50. Chemistry/Science - please help!

    An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis?

  51. chemistry

    A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2

  52. Mechanical Behavior of Materials

    What controls the Young's modulus in the viscoelastic regime of an amorphous polymer? Sliding between short segments of polymer chains Stretching of molecular bonds Melting of secondary bands, and an increase in free volume Second derivative of the

  53. Mechanical Behavior of Materials

    What controls the Young's modulus in the glassy regime of an amorphous polymer? Sliding between short segments of polymer chains Stretching of molecular bonds Melting of secondary bands, and an increase in free volume Second derivative of the

  54. biology

    A solution of the enzyme amylase was added to a solution of starch and kept at 25C. The starch was broken down by hydrolysis. Explain how you would determine the rate of hydrolysis.

  55. Science Bio

    Hi there, I have a quick question which I'm really stumped on. 1. When combined with Lugol's solution (iodine), does glucose and sucrose contain starch? I think glucose has starch but not sucrose. Is this right?

  56. Chemistry

    Is Amylose different than Amylopectin in that Amylose is a polymer of a-D-glucose but amylopectin is a polymer of b-D-glucose? Thanks for any help offered. Carbohydrates that are called reducing sugars are those that__ a. have OH groups that are easily

  57. Life sciences Grade 11

    Grade 11 learners want to investigate which enzyme is responsible for chemical digestion of starch into glucose in humans. They are provided with two different enzymes (carbohydrase and Protease)starch powder,warm water at about 37°C and basic glass

  58. Chemistry

    A(g) + B(g) AB(g) At a given temperature 1.0 mole of A and 1.0 mole of B are placed in the 1.0 litre vessel and allowed to reach equilibrium. Analysis revealed that the equilibrium concenration of AB was 0.40 molar. What percent of A had been converted to

  59. chemistry

    What is the purpose of adding zinc chloride in the preparation of starch iodide paste? Please refer to the procedure below: - Starch Iodide Paste- Heat 100mL of water in a 250mL beaker to boiling, add a solution of 0.75g of potassium iodide in 5mL of

  60. Chemistry

    What is the purpose of adding zinc chloride in the preparation of starch iodide paste? Please refer to the procedure below: - Starch Iodide Paste- Heat 100mL of water in a 250mL beaker to boiling, add a solution of 0.75g of potassium iodide in 5mL of

  61. Biology

    I added amylase to a cornstarch suspension. I thought that amylase breaks down starch into oligosaccharides. But then I heated up the amylase + cornstarch solution and added Benedict's reagent to it (which tests for the presence of monosaccharides). The

  62. Life science

    Grade 11 learners want to investigate which enzyme is responsible for chemical digestion of starch into glucose in humans.They are provided with two different enzymes ( carbohydrase and protease),starch powder,warm water at about 37 degrees Celsius and

  63. Nutrition

    You decide to perform proximate analysis on a sample from your best friend's diet. Most abundant component(s) in nitrogen free extract of diet would be: a) insoluble fibre b) starch c) triglyceride d) Sodium and potassium I know the correct answer is b)

  64. Chemistry

    I mixed 5ml H202 with 5ml KI with 5ml H2SO4 wit Na2So2O3 with 50ml. Now I am trying to figure out all the elementary steps for this reaction. A starch was added in this mixture to measure the reaction time with the thiosulfate and the I2. I was just wonder

  65. Chemistry Repost

    I mixed 5ml H202 with 5ml KI with 5ml H2SO4 wit Na2So2O3 with 50ml. Now I am trying to figure out all the elementary steps for this reaction. A starch was added in this mixture to measure the reaction time with the thiosulfate and the I2. I was just wonder

  66. chemistry

    6.3E7 cm converted to mm would be 4.3cm converted to in would be

  67. Chemistry

    A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2

  68. chemistry

    please can u help i need to a structure of a polymer and i dentify the monomer unit and include three monomer units,from the compound CH2=CH-CH-OH CH3 AND STATE THE POLYMERIZATION INVOLVED IN FORMING THE POLYMER,please help i have tried ,but i cant make

  69. History

    Which most accurately describes the Arab Empire’s impact on religion in the Middle East? the Arab empire converted and unified pagan societies to Judaism the Arab empire converted and unified pagan societies to Islam the Arab empire converted and unified

  70. carbon+sugar=starch

    Why are you saying that carbon is needed to make starch? Actually only sugar (glucose) is needed along with an enzyme to catalyze the linkage of multiple glucose units in a dehydration (loss of water) reaction. Glucose + Glucose ----> maltose + H2O maltose

  71. chemistry

    Is the ritalin molecule a polymer?

  72. biology

    Design a way to determine the effects of different concentrations of starch on the mass of dialysis tubing bags when the bags are allowed to sit water for several hours. Plan to put different concentrations of starch solutions in the bags. You may want to

  73. science

    a polymer of sugar molecules is called

  74. science

    A box was lifted using a pulley. If 1,000 W were required, which of these correctly describes power and energy for this action? 500 J of energy were converted into some other energy every second and two times the power was required. 1,000 W of power were

  75. AP BIO

    a student wished to test a sample of organic material to determine whether it was sugar, a dat, or starch. If she could perform only one of the following, which would be the most revealing? 1- test for the presence of carbon and hydrogen in the sample 2-

  76. science

    How can starch be converted into a polymer

  77. Chemistry

    How is the water drawn into the polymer? How is the polymer held in the polymer? What are the intermolecular bonds between the polymer and the water? A diagram again may help. What factors affect the effectiveness of SAP?

  78. Biology

    Which of the following is a polymer of an amino sugar? a.) cellulose b.) chitin c.) glycogen d.) starch

  79. polymer science

    its possible to convert the commercial polymer into nano polymer and its affact any property of polymer

  80. Material science/ Mechanics

    A cube polymer matrix is subjected to elastic deformation in compression by 10 N applied force. The cube is deformed by 20% of its original shape. The cube side has a length of 1 m. If you assume that the polymer has the intrinsic properties of rubber,

  81. Chemistry

    In the laboratory exercise "Preperation and Properties of Polymers", polyvinyl alcohol is dissolved in water and then reacted with borax (Na2B4O7·10H2O) in water. Which of the following are expected results of this reaction? True or False? 1. Polyvinyl

  82. organic chemistry

    what characteristics must a molecule have to be part of a) a condensation polymer b) a addition polymer

  83. polymer science

    how the strength polymer need for polymer electrolyte prepatation

  84. Chemistry

    In chemistry, how is a monomer related to a polymer? Think of a chain: Each link is a monometer, as the links are joined, you have a chain which represents the polymer.

  85. 9th grade Health

    I have to know what recommendations concerning starch in our diet, and the chemistry of starch as well. Please help?

  86. chemistry

    A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2

  87. Mechanical Behavior of Materials

    What controls the Young's modulus in the rubbery regime of an amorphous polymer? Sliding between short segments of polymer chains Stretching of molecular bonds Melting of secondary bands, and an increase in free volume Second derivative of the

  88. Chemistry - help needed

    In titrations involving sodium thiosulphate and potassium iodide, is it necessary to use starch solution to help us see the end point? If the colour change from yellow to colourless is easily visible, is it acceptable not to use the starch solution?

  89. Chemistry

    a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of

  90. Chemistry

    a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of

  91. salivary amylase

    Salivary amylase is secreted by the salivary glands, and catalyzes the breakdown of starch and glycogen to smaller polypeptides. the breakdown of starch and glycogen to smaller polysaccharides. the breakdown of proteins to smaller polypeptides. the

  92. chemistry

    What is the hydrocarbon that will not form an additional polymer A compound which is not a hydrocarbon but will form an additional polymer

  93. ELECTROLYSIS OF ZnI2

    ELECTROLYSIS OF ZnI2 if you have done this experiment Please help me answer these questions as i missed the last half of my chem lab today. 1. What color change occurred when the wire is first heated. -next question is... What is the identity of the

  94. P5 Science

    My full question. A leaf was plucked from the garden. The procedure for testing for starch in the leaf was carried out. Part of the leaf turned blue-black and part of the leaf just turned brown. Question : Why do you think the other part of the leaf did

  95. science

    A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2

  96. Chemistry

    PART 1 >>Trial 1 Reactant Solution A 10 ml I^-, 5.0 ml S2O3^2- Reactant Solution B 10 ml S2O8^2-, 1 ml starch time to react = 10 seconds >>Trial 2 Reactant Solution A 10 ml I^-, 5.0 ml S2O3^2- Reactant Solution B 5 ml S2O8^2-, 1 ml starch time to react =

  97. reagents

    Do these reagents fit with the substance being testd for? First is Biuret reagent protein Second is BACL^2 starch Third is AgNO^3 chloride ion Final is albustix protein. I can help with two of these. BaCl2 is used to test for sulfates, not starch. AgNO3 is

  98. Science

    I need an idea for something cool to do with a polymer pellet?

  99. chemistry

    What is the monomer and polymer structure of DNA?

  100. Chemistry

    PART 1 >>Trial 1 Reactant Solution A 10 ml I^-, 5.0 ml S2O3^2- Reactant Solution B 10 ml S2O8^2-, 1 ml starch time to react = 10 seconds >>Trial 2 Reactant Solution A 10 ml I^-, 5.0 ml S2O3^2- Reactant Solution B 5 ml S2O8^2-, 1 ml starch time to react =

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