Showing posts with label chemistry. Show all posts
Showing posts with label chemistry. Show all posts

Friday, June 25, 2010

Paper Model of DNA - 2009-2010


If you are looking for the patterns and some pictures for the paper DNA model, please look at my April 8, 2007 posts! Starting with:


http://cavalierscience.blogspot.com/2007/04/how-to-make-paper-model-of-dna.html


http://cavalierscience.blogspot.com/2007/04/cut-out-pattern-for-making-paper-model_08.html


http://cavalierscience.blogspot.com/2007/04/cut-out-pattern-for-making-paper-model.html
They include the directions and templates for making the model.
 
Here are the pictures of the DNA model that was made by my students for the school year 2009-2010.  The sections of blue and gold DNA were the result of instruction by my student teachers from the University of Delaware and are the school's colors.
 

Wednesday, December 02, 2009

Chemistry of Materials Project - Biochemistry

Here is the latest version of the Chemistry of Materials Project, with emphasis on biological chemistry. Also, the following link provides a list of some helpful web sites for information about the project's topics. I also am providing the link to the previous Chemistry of Materials project description.
Chemistry of Materials – Coordinated Science II –Project

Assignment and Objective: Understanding atomic and molecular structure expands our knowledge of the nature of the material world and advances the technological sophistication of society. Each student will learn about the history and chemical make-up of a commonly used material, and present that information to the class. Students will also be responsible for learning about the topics that are presented by others.  A very helpful website, titled What's That Stuff,? for this project can be found here:  http://pubs.acs.org/cen/whatstuff/

Procedure:
Each student will be assigned a topic by lot (random drawing from a container). Each student in the class will have a different topic to research, which will be one of the following topics:

∙ Henna ∙ Chili peppers ∙ Chewing Gum ∙ Insect Repellent
∙ Honey ∙ Food Coloring ∙ Food Preservatives ∙ Self Tanners
∙ Citronella Oil ∙ Kava ∙ Artificial Sweeteners · Pectin
∙ Catnip ∙ Kitty Litter ∙ JELL-O® · Chitin
∙ Sunscreens ∙ Licorice · Tattoo Ink · Cholesterol
∙ Marshmallows · Sports Drinks · Margarine
∙ Ice Cream · Leather · MSG Flavor Enhancer
∙ Fluoride ∙ Aspirin ∙ Chocolate
∙ Hair Coloring ∙ Cheese Whiz ∙ Agar
∙ Lipstick · Amber · Cinnamon

This is an independent, at-home research project.

Each individual student will present their research information to the class by presenting an 11” by 17” Shutter Fold (foldable) display of their work, which is constructed according to the attached directions and as demonstrated by the teacher. Pictures of sample displays are on this web site: http://www.cavalierscience.blogspot.com/
The display is to include the following:
­­­­­­ 1. a history of the use and/or invention of the material.
2. diagrams/drawings of the chemical structures, or chemical formula of all the ingredients that make up the
material.
3. the health hazards and health benefits of the material.
4. a biography of the inventors of the material, or a description of a company that manufactures the
material.
5. a copy of a patent from http://patft1.uspto.gov/netahtml/PTO/search-bool.html or
http://www.google.com/patents where the name of the material, or the important chemical ingredient in
the material has been put in as a search term.
6. a completed information sheet about the patent.
7. pictures of the material, or actual samples of the material.
8. The student’s research information should include a bibliography (MLA format), with a minimum of two
references. This is a formal presentation. The writing and project should reflect a student’s best effort.

During the presentations, the audience will take notes about each of the materials.
Everyone will be responsible for knowing the important facts about each material and will graded on their proper
participation as an audience.

The finished project is due on Tuesday, December 15, 2009. The Middletown Cavalier Chemical Science
Meeting will commence on December 15 and run through December 16 to allow for all students to have
an opportunity to present and gather the important information about each topic. Late projects will not
be accepted. Students must be prepared to present on December 15. Projects are a product grade for the
marking period and this project will be evaluated as follows:
∙ Visual Aid/Foldable presentation 20 points
∙ Important information included 18 points
∙ Well organized 06 points
∙ Pictures of Material & Chemical Structure 06 points
∙ Copy of Patent with Completed Information Sheet 20 points
∙ Bibliography – must have two sources 12 points
∙ Audience Notes 18 points

You can access the grading rubrics that I created at these links:
Making a Foldable Display - Chemistry of Materials Project
Oral Presentation Rubric: Chemistry of Materials Project Oral Presentation

Here is a previous list of topics that I used, when the curriculum had more emphasis on chemistry:
∙ Henna ∙ Chili peppers ∙ Chewing Gum

∙ Honey ∙ Polyurethane foam ∙ Food Coloring ∙ Food Preservatives
∙ Citronella Oil ∙ Kava ∙ Artificial Sweeteners ∙ MSG Flavor Enhancer ∙ Licorice
∙ Melamine Dishes ∙ Catnip ∙ Kitty Litter ∙ JELL-O® ∙ Insect Repellent
∙ Crayons ∙ Golf Balls ∙ Sticky Notes ∙ Super Glue ∙ Sunscreens
∙ Marshmallows ∙ Gasoline ∙ Teflon ∙ Teeth Whiteners ∙ Motor Oil
∙ Ice Cream ∙ Glass ∙ Duct Tape ∙ Shower Cleaners ∙ Fireworks
∙ Fluoride ∙ Aspirin ∙ Chocolate ∙ Silly Putty ∙ Self Tanners
∙ Hair Coloring ∙ Cheese Whiz ∙ Asphalt ∙ Baseballs ∙ Mylar
∙ Lipstick ∙ Light (glow) sticks ∙ Cement ∙ Tyvek ∙ Kevlar

Here is an example of an assessment that was used with the project:

What am I? Coordinated Science II – TEST – Chemistry of Materials


Date __________________Period ________________Name ______________________________

Directions: Match the descriptions in column A (page 1) with the letter(s) of each material listed in column B (page 2), and write the letters on the blank space next to each number in column A. For a perfect score, correctly match 15. If more than 15 materials are identified correctly, 0.5 points will be awarded for each correct match that exceeds the perfect score of 15 matches.

COLUMN A

01. ____ I am polymer that comes from tree sap.
02. ____ We are saccharine, aspartame, and sucralose.
03. ____ I am in a class of chemicals called terpenes. I
come from the leaves of a plant and am an
insect repellent.
04. ____ I am a long, long, long molecule of
polyunsaturated fat.
05. ____ I am nepetalactone and can be extracted from a
mint family plant.
06. ____ I am a essential oil that comes of the bark of an
evergreen tree. There are 3 n’s in my name. I
am used in flavoring and perfume.
07. ____ I am a long molecular chain of galacturonic
acid. I am the “jel” in jelly.
08. ____ I am added to drinking water to protect teeth.
09. ____ I am pigment, wax, and oil.
10. ____ I am one of the most complex chemical
mixtures that people dare to eat, and I have
theobromine.
11. ____ I am a drink made from plant roots.
12. ____ I am used in desserts, marshmallows, and
candy. I do not have the amino acid tryptophan.
13. ____ We bond to your skin. We are
dihydroxyacetone.
14. ____ I am acetylsalicylic acid.
15. ____ I am monosodium glutamate.
16. ____ We contain the protein collagen, a sugar, and
air.
17. ____ I am the result of a reaction between hydrogen
peroxide, ammonia, and p phenylenediamine.
18. ____ We absorb uva and uvb radiation with an
aromatic chemical.
19. ____ I am glycyrrhizic acid and taste very sweet.
20. ____ 7 of us are certified by the Food and Drug
Administration (FDA) as dyes.
21. ____ I have a protein called casein that is treated
with an enzyme to produce curd.
22. ____ We contain a capsaicin, which causes a burning
sensation in contact with mucus membranes.
Capsaicin resulted from natural selection in
response to herbivores.
23. ____ I am a special kind of clay called sodium
Bentonite, or Fuller’s earth.
24. ____ We contain N,N-diethyl-m-toluamide (DEET).
25. ____ I am dye from the leaves of Lawsonia inermis.
26. ____ I am fructose and taste very sweet.
27. ____ I am a source of Calcium and Lactose.
28. ____ I form the tough exoskeleton of an insect, and I
am made of repeating molecules of
N-acetylglucosamine, which is a
polysaccharide.
29. ____ Human steroids and Vitamin D are made from
me. I am made in the liver.
30. ____ We are very stable and long lasting. Different
colors are made from magnetite, carbon, iron
oxides, monoazo pigments, and copper.
31. ____ I am made from collagen that has been treated
with tannin from bark.
32. ____ I am a fossil of tree resins (terpenes).
33. ____ We are a flavored solution of sugar, salt, and
sodium citrate.
34. ____ One of our chemicals kills microorganisms and
has the molecular structure: NaCl
35. ____ I am a polymer of galactose that is obtained
from seaweed. Microorganisms grow on me.
I am also used to thicken jelly and ice
cream.

COLUMN B
A. Hair Coloring
B. Sports Drinks
C. Marshmallows
D. Henna
E. Self-Tanning Products
F. Catnip
G. Leather
H. Lipstick
I. Food Preservatives
J. Citronella Oil
K. Cheese Whiz
L. Artificial Sweeteners
M. Margarine
N. Agar
O. Cinnamon
P. Pectin
Q. Chitin
R. Cholesterol
S. Ice Cream
T. Tattoo Inks
U. Amber
V. Sunscreens
W. Jell-O
X. Chocolate Candy
Y. Licorice
Z. Honey
AA. Aspirin
BB. Chili Peppers
CC. Chewing Gum
DD. Kitty Litter
EE. Kava
FF. Insect Repellent
GG. Fluoride
HH. Food Coloring
II. MSG Flavor Enhancer

Looking for topics that could be used with a similar project on inventions?  Visit this web site:
http://www.popularmechanics.com/technology/gadgets/reviews/101-gadgets-that-changed-the-world#fbIndex101
Here is an interesting book:  http://www.powells.com/book/joy-of-chemistry-the-amazing-science-of-familiar-things-9781591027713/2-0
Here is a very helpful website with interesting visual presentations about the chemistry of everyday materials:
http://www.compoundchem.com/

If you find links on my blog that do not work, please let me know by submitting a comment.  I would like to keep my blog up-to-date, correct and relevant.

Wednesday, March 25, 2009

What is the Chemical Composition (Ingredients) of Ivory Soap?

Based on the analysis given in U.S. Patent No. 3,933,780 , the composition of Ivory Soap was determined to be 12.8% Lauric Acid, 7.5% Myristic Acid, 0.6% Myristoleic Acid, 21.8% Palmitic Acid, 3.7% Palmitoleic Acid, 13.6 % Stearic Acid, 31.6% Oleic Acid, 3.1% Linoleic Acid, and 5.2% Other (includes C6-C10). All these acids are as their sodium salts. The numbers are probably plus or minus 3% and vary with the species of animal rendered for tallow, and the time of year that either the tallow, or coconut oil was obtained. The mixture is optimized for cleaning. The coconut oil (cocoate) has C12-C14 sodium salts that give a good lather, but are not very good for cleaning. The tallowate is not good for lather, but is very good for soil removal. The acids are shown in their cis form. There can be some isomerization to trans, during processing. The ivory soap bar may also contain some glycerin, sodium chloride, and water. Taken as a whole, the average molecular weight of the sodium salts is 281 grams/mole. A wikipedia article discusses fatty acids. http://en.wikipedia.org/wiki/Fatty_acids . A table of the GLC analysis and chemical structures of the fatty acids found in Ivory Soap (reg. trademark) are illustrated below:



If you find any links on my blog that do not work, please let me know by submitting a comment.  I would like to keep my blog up-to-date and relevant.

Saturday, May 03, 2008

Chemistry of Materials Web Sites - Chemical Compounds of Plants & Animals

If you are looking for resources and information, about chemical compounds in plants and animals, for your Chemistry of Materials project (my February, 25, 2008 post and December 2, 2009)
http://cavalierscience.blogspot.com/2008/02/coordinated-science-ii-chemistry.html
http://cavalierscience.blogspot.com/2009/12/chemistry-of-materials-project.html

try this web site:  http://waynesword.palomar.edu/chemid1.htm

Here is an additional web site that you can browse through to find out chemical information: http://www.newtonsapple.tv/TeacherGuides_alphabet.php#
You might also find some useful information on this web site:
http://en.wikipedia.org/wiki/Timeline_of_United_States_inventions_and_discoveries
Here is a helpful web site from Chemical and Engineering News:
http://pubs.acs.org/cen/whatstuff/stuff.html
If your material is a polymer or plastic, here are some web sites that might have some information that you can use:
http://www.americanchemistry.com/s_plastics/sec_learning.asp?CID=1571&DID=5957
http://www.glencoe.com/sites/delaware/teacher/science/assets/webquest.html
This web site is called Ask a Chemist, and there are a lot of answers on here that might have helpful information:
http://www.newton.dep.anl.gov/askasci/chem98.htm
Explorations of Everyday Chemical Compounds - Compound Interest
http://www.compoundchem.com/

More interesting web sites:

All About Paper
http://www.hqpapermaker.com/paper-history/
Hall of Fame – Invention Channels: Chemistry
http://www.invent.org/hall_of_fame/1_4_5_chem.asp
Historical Facts – Toilet Paper
http://encyclopedia.toiletpaperworld.com/toilet-paper-history
How is Vinyl Made?
http://vinylinfo.org/WhatIsVinyl/HowisVinylMade.aspx
How Food Preservation Works
http://recipes.howstuffworks.com/food-preservation.htm/printable
Paper University – Where Students and Teachers Explore the World of Paper!
http://www.tappi.org/paperu/welcome.htm
Plast-O-Matic (Plastics)
http://pbskids.org/wayback/future/plastics/index.html
The Chemistry of Cosmetics in Ancient Egypt
http://www.cefic.org/Templates/shwNewsFull.asp?HID=1&NSID=656&P=1&NID=469
The History of the Kellogg Company: Invention of Flaked Cereal
http://www.
kellogg.com.au/Home/Company/StudyCentre/Kellogghistory/Inventionofflakedcereal/tabid/128/%20Study%20Centre/Default.aspx

United States Patent and Trademark Office; Kids’ Pages
http://www.uspto.gov/go/kids/
What’s That Stuff? Food Preservatives
http://pubs.acs.org/cen/science/8045/8045sci2.html
What’s That Stuff? Paper
http://pubs.acs.org/cen/whatstuff/stuff/paper.html

Monday, April 16, 2007

4th Marking Period Chemistry Project


Chemistry of Materials – Coordinated Science II – 4th Marking Period Project

DUE TUESDAY, MAY 8, 2007

Assignment and Objective: Understanding atomic and molecular structure expands our knowledge of the nature of the material world and advances the technological sophistication of society. Each student will learn about the history and chemical make-up of a commonly used material, and present that information to the class. Students will also be responsible for learning about the topics that are presented by others.


Procedure:

1. Each student will be assigned a topic by lot (random drawing from a container). Each student in the class will have a different topic to research, which will be one of the following topics:


∙Amber∙Henna∙Plastic Bags∙Chili peppers∙ Erasers∙ Honey∙Polyurethane foam
∙Margarine∙Food Coloring∙Food Preservatives∙Citronella Oil∙Kava
∙Artificial Sweetners∙MSG∙Licorice∙Chicken Eggs∙Catnip∙Kitty Litter∙JELL-O®
∙Bug Sprays∙Rain Coats∙Golf Balls∙Sticky Notes∙Soap Bubbles∙Sunscreens
∙Marshmallows∙Gasoline∙Artificial Snow∙Teeth Whiteners∙New Car Smell
∙Motor Oil∙Ice Cream∙Glass∙Opal∙Shampoo∙Shower Cleaners∙Pencils and Pencil Lead
∙Fireworks∙Fluoride∙Aircraft Deicers∙Chocolate∙Silly Putty∙Self Tanners
∙Hair Coloring∙Cheese Whiz∙Asphalt∙Baseballs∙Lycra/Spandex∙Lipstick
∙Light(glow)sticks∙Ink∙Cement∙Tyvec∙Kevlar∙Paper


This is an independent, at-home research project.


2. Each individual student will present their research information to the class by presenting a brief oral presentation and an 11” by 17” Shutter Fold (foldable) display of their work, which is constructed according to the attached directions and as demonstrated by the teacher. The display is to include the following:

1. a history of the use and invention of the material.

2. diagrams/drawings of the chemical structures, or chemical formula of all the ingredients that make up the material.

3. the health hazards and health benefits of the material.

4. a biography of the inventors of the materials, or a description of a company that manufactures the material.

5. a copy of a patent from http://patft1.uspto.gov/netahtml/PTO/search-bool.html or
http://www.google.com/patents where the name of the material, or the important chemical ingredient in the material, has been put in as a search term.

6. A completed information sheet about the patent.

7. pictures of the material, or actual samples of the material.

8. The student’s research information should include a bibliography (MLA format). This is a formal presentation. The writing and project should reflect a student’s best effort.

3. During the oral presentations, the audience will take notes about each of the materials; everyone will be responsible for knowing the important facts about each material and will graded on their proper participation as an audience.

4. The finished project is due on Tuesday, May 8, 2007. The Middletown Cavalier Chemical Science Meeting will commence on May 9 and run through May 11 to allow for all students to have an opportunity to present the important information about each topic. Late projects will not be accepted. Students must be prepared to present on May 9. The project is 20% of the marking period grade and will be evaluated as follows:
∙ Visual Aid/Foldable presentation 20 points

∙ Important information included 18 points

∙ Well organized 06 points

∙ Pictures of Material 06 points

∙ Copy of Patent with Completed Information Sheet 20 points

∙ Bibliography – must have two sources 12 points

∙ Audience Notes 18 points

____________________________________________________________________________
4th Marking Period Chemistry Project - Attach This Patent Information Sheet to the patent that you hand in for your project. The project is due Tuesday, May 8, 2007
Patent Information Sheet

Student Name __________________

1. What is the name of the invention?


2. What is the Patent Number of the invention?


3. What is the name of the inventor? If the patent had been assigned to a company, what is the name of the company that “owns” the patent?



4. What is the date of the invention?


5. Summarize the claims, or specifications of the invention. Why did the inventor come up with this idea?







6. What did the inventor do to show that his invention actually works? (This is called reduction to practice.)







7. What resources did the inventor use to manufacture his product?






8. Summarize the history that led to the invention (prior art). What improvements did the inventor make, or why is the invention useful?







9. Is the invention an example of the saying “Necessity is the mother of invention?” Why, or why not?