20.109(S17):Homework

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20.109(S17): Laboratory Fundamentals of Biological Engineering

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Schedule Spring 2017        Announcements        Assignments        Homework        Communication
       1. High-throughput ligand screening        2. Gene expression engineering        3. Biomaterials engineering              

Module 1: High-throughput ligand screening

Due M1D1

  1. Review the Laboratory Orientation exercises to prepare for the Orientation quiz that you and your partner will complete together during your laboratory section.
  2. Complete the required EHS training on-line.
    • There are two web-based training modules required for 20.109: General Chemical Hygiene includes 7 sections and 6 quizzes with an estimated completion time of 1 hour and Managing Hazardous Waste has one quiz and should take less time to complete. Both courses can be accessed through MIT's Environmental Health and Safety page, from any computer that has your MIT certificate on it.
    • From the EHS training page select the second button labeled "I have EHS training requirements for an academic subject."
    • Your summary page ("My EHS Training") should show Chemical Hygiene and Managing Hazardous Waste as requirements. Click the purple button "Go to Web Classes" above the training requirements section. You may stop and start the web-based courses as many times as you need; the software keeps track of your progress in the course.
    • If you have completed EHS training in a UROP or in another lab class, you do not need to repeat the training but you do need to print out your training record to submit.
    • You must print the certificates of completion (or your training record) to turn in at the start of your laboratory section.
  3. Download Benchling onto your computer. This program will serve as your laboratory notebook for the semester.
  4. Prepare for the first day of Module 1 by reading the module overview and the M1D1 introduction.

Due M1D2

  1. To prepare for your laboratory session, complete a template for your notebook entry according to the Laboratory notebook guidelines provided on the Communication page. You will use these guidelines for every notebook entry you complete in 20.109.
    • For additional help, see the template for your M1D2 notebook entry below.
Sp17 20.109 notebook entry template.png

Due M1D3

  1. Often illustrations are useful when discussing experimental approaches in written communication outlets. Prepare a schematic diagram that depicts the protein purification portion of your experimental approach for Module 1. See the Module 1 overview page for an example, but do not simply copy this image!
    • Think about which steps are important to the overall goal of your approach and which are minor methods details that can be omitted.
    • Schematics are figures and should have both a title and a caption.
  2. The BE Communication Lab is a great resource to keep in mind as you complete your assignments for 20.109. To familiarize you with this resource, you will receive homework points for meeting with a Fellow to discuss an assignment by M1D4.
    • You must schedule your appointment online at the BE Communication Lab homepage. Click "Make an appointment" at the top right corner of the screen.

Due M1D4

  1. Use the data collected from the polyacrylamide gel and BCA assay to generate a figure for your Data Summary.
    • Review the information provided by the BE Communication Lab workshop on M1D3.
    • Carefully consider how to best present the data before you start. You can use any graphs or tables you generate from the data; however, it is best not to show the same data set in numerous forms unless you are highlighting specific aspects of each representation.
    • All figures must include a title and a caption.
  2. As a reminder, you should meet with a Fellow in the BE Communication Lab by M1D4 to discuss an assignment.
    • You must schedule your appointment online at the BE Communication Lab homepage. Click "Make an appointment" at the top right corner of the screen.
    • Submit a short written summary (1-2 paragraphs) concerning your meeting with a Fellow from the BE Communication Lab. Consider including your thoughts on the utility of your meeting and what you learned from the discussion.
  3. In Module 2, you will document the details of your experiments in a written methods section as part of the Research Article. To help you prepare for this task, and to give you feedback early on, you will draft portions of the Module 1 methods. For this assignment, write sub-sections that details the protocols you completed on M1D2 and M1D3.
    • Be sure to read the Materials and Methods information within the Written communication guidelines section of the Communication page before you begin; doing so will save you some time and effort.
    • To assist you with this assignment, the teaching faculty will host open office hours during the normally scheduled laboratory class times on Tuesday and Wednesday in 56-302).

Due M1D5

  1. In addition to reporting your results in the M1 Data Summary, you will need to introduce your project. For this assignment, write topic sentences that will provide the reader with the information necessary for understanding your research. Your topic sentences should include references that you find to validate and support the statement. Please include between 3 and 7 topic sentences.
    • Be sure to read the Introduction information within the Written communication guidelines section of the Communication page before you begin; doing so will save you some time and effort.
    • Carefully consider the Background and Motivation suggestions provided for the M1 Data Summary.
    • In addition to the topic sentences, submit a list of your references. You should include the title of the referenced article and a brief summary of the article that includes why you chose that reference to support your topic sentence. At this point the references can be in any format you choose.
  2. In publications, the data is represented both in figures and in text. In a previous assignment your prepared that illustrated the data figure for your polyacrylamide gel and BCA experiments. Here you will provide the text for these data.
    • Be sure to read the Results information within the Written communication guidelines section of the Communication page before you begin; doing so will save you some time and effort.
    • Use the following questions to guide you as you prepare the bullet points for this section. Ideally each question will be addressed in 1-2 bullets.
Sp17 20.109 results-interpretations bullets.png

Due M1D6

  1. In addition to the M1 Data Summary, each student will individually complete a Mini-presentation that is focused on the data generated in Module 1. The mini-presentation (or 'elevator pitch') is your opportunity to practice your oral communication skills before the Journal Club presentation in Module 2. For this assignment, prepare an outline for your mini-presentation.
    • You should not submit a script, but rather a bulleted outline of the information you will provide in your Mini-presentation.
  2. The assignments due on M1D7 may be time consuming. Please consider getting an early start!

Due M1D7

  1. The Data Summary will end with a section that highlights the importance and future applications of your project. For this assignment, you will draft this portion of your summary. This part of the homework will not be turned in and graded. Jot down notes for yourself, which you will update during lab time next week.
    • Be sure to read the Discussion information within the Written communication guidelines section of the Communication page before you begin; doing so will save you some time and effort.
    • Carefully consider the Implications and Future Work suggestions provided for the Data Summary.
  2. Use the feedback you received from the teaching faculty concerning the Materials and Methods draft you prepared for M1D4 to revise your text.
    • In addition, include the experimental protocols you completed M1D1 (not the in silico cloning, only the protein expression induction by IPTG) through M1D4 in this revised assignment.

Wrapping up M1

  1. The Data Summary draft is due by 10 pm on Monday, March 13th for both sections.
  2. The Mini-presentation is due by 10 pm on Saturday, March 18th for both sections.
  3. The Data Summary revision is due by 10 pm on Monday, March 27th for both sections.
  4. Please remember to contribute your reflections, comments, and ideas to the 20.109 class blog by 10 pm on Monday, April 3rd for both sections.

Module 2: Modulating gene expression

Due M2D1

  1. Prepare for the first day of Module 2 by reading the module overview and the M2D1 introduction.
  2. Carefully read the Dietlein et al. research article to prepare for an in-laboratory discussion.
    • Refer to Part 3 of M2D1 for more details concerning the questions that will be addressed during this discussion.

Due M2D2

  1. The oral communication assignment for this module is a Journal club presentation. The presentation dates are scheduled for M2D5 and M2D8. The slots for each presentation date are first-come-first-serve; however, you should consider your workload in the coming weeks when you reserve a date rather than simply choosing M2D8 to give yourself more time...or simply choosing M2D5 to get the assignment out of the way.
    • Reserve a slot to present on either D5 or D8 using the link above.
    • Review and reserve a journal article from the options provided, or submit your own selection to the teaching faculty for approval.
    • Be mindful when choosing your journal article as you will not be permitted to change your article without permission from the teaching faculty after M2D2!

Due M2D3

  1. To help you prepare for the Journal Club presentation, you will craft a single slide using the data from the publication by Dietlein et al. that was reviewed last week. Please keep the following in mind as you prepare this assignment:
    • Choose a single figure from the article to present on a slide.
    • Your slide should show the data and highlight the key finding(s).
    • Remember that you will provide information orally and therefore do not need to include everything on the slide.
    • The information should be clear and large enough to read.
    • Keep text to a minimum, but include necessary information.
    • The title should state the take-home message of the data that are shown.

Due M2D4

  1. As in Module 1, figures and captions will be important in your Research article; luckily, you have a lot of practice in crafting effective data images. Prepare an image with your Western blot data that will be included in your Research article.
    • Remember that your figure should include a title and caption!
  2. One difference between the Data summary and Research article is that your associated results text will be written in paragraphs rather than bullet points. For the figure you crafted with your Western blot data, include a results narrative according to the information provided in the Results section of the general guidelines for scientific writing on the Communication page. Please keep the following details in mind:
    • Each sub-section should have a title that states the conclusion of that particular experimental step. In addition, each results paragraph should start with an overview, or introductory, sentence that motivates and introduces the experiment.
    • State the results of the experiment, minimizing any interpretation of the data.
    • End each results paragraph with a concluding sentence that provides a transition to the next experimental step when possible.
    • Each paragraph should only include one topic, but each sub-section may have more than one paragraph.

Due M2D6

  1. Though you practiced crafting a Methods section in module 1, this information was not included in your Data summary. In the Research article this information will be included and graded! For this assignment, you will write the initial sub-sections of your Methods. This early draft should include the procedures completed M2D1 through M2D4 according to the information provided in the Materials and methods section of the general guidelines for scientific writing on the Communication page.
    • Think carefully about the scope of each experimental step and how certain protocols can be combined or divided into coherent sub-sections.
    • Be sure that you write the procedures clearly and concisely, with enough detail so a non-109er can complete the experiment and find the necessary materials.
    • Avoid jargon and excess descriptive words.

Due M2D7

  1. For this assignment you will apply the skills you have developed in crafting methods sections to edit the methods section of a peer. Carefully read through the methods section of your classmate and comment on the following:
    • Is the information complete? Are any procedural steps absent? Is important information pertaining to any of the procedures missing?
    • Is the information clear? Are the procedural steps presented in an order that makes sense?
    • Are the sections divided and grouped appropriately?
    • Is the information presented in a way that can be followed by someone less familiar with the experimental procedure? Does the author use concentrations to convey amount?
    • Are the sections written in complete sentences?
    • Please note: for this assignment you will submit your typed comments as a separate document using the 'numbering method' employed by the teaching faculty. Please be specific in your comments to the author (use examples from the text to support your comments).

Due M2D9

  1. As in module 1, you will need to introduce your project in the Research article. For this assignment, write the first paragraph of your Introduction according to the information provided in the Introduction section of the general guidelines for scientific writing on the Communication page. For the remaining paragraphs that will form your Introduction, include topic sentences that provide an overview of the information you will include.
    • In addition to your first paragraph and the topic sentences, submit the references from which you obtained the information contained within your assignment.
    • You should include the title of the referenced article and a brief summary that informs the teaching faculty of why you chose that reference to support your statement(s).
  2. Outline a Discussion section that interprets the data that will be represented in your Research article according to the information provided in the Discussion section of the general guidelines for scientific writing on the Communication page.

Wrapping up M2

  1. Please remember to contribute your reflections, comments, and ideas to the 20.109 class blog concerning the Journal club presentation by 10 pm on Saturday, April 15th for both sections.
  2. The Research article is due by 10 pm on Saturday, April 22nd for both sections.
  3. Please remember to contribute your reflections, comments, and ideas to the 20.109 class blog concerning the Research article by 10 pm on Sunday, April 23rd for both sections.

Module 3: Biomaterials engineering

Due M3D1

  1. Prepare for the first day of Module 3 by reading the module overview and day one introduction.

Due M3D2

  1. The primary assignment for this experimental module will be for you to develop a Research proposal and present your idea to the class. Please describe five recent findings that could potentially define an interesting research question. You should hand in a 3-5 sentence description of each topic, in your own words, and also formally cite an associated reference from the scientific literature. The topics you pick can be related to any aspect of biological engineering. During lab next time, you and your partner will review the topics and narrow your choices, identifying one or perhaps two topics for further research.
    • Please note: for this assignment, you do not need to have a novel research idea completely sketched out; you simply have to describe five recent examples of existing work that you find interesting. However, you can start to brainstorm how to expand those topics into something new if you want to get ahead of the game.

Due M3D3

  1. This assignment is to be written as a team, not individually. Discuss the potential research topics you prepared for the previous assignment with your co-investigator (your lab partner) and write a paragraph concerning the research question you would like to pursue for your research proposal. Please include 2-3 sentences that introduce your topic and a brief discussion of your potential plan. Consider the following as you discuss your potential research topics:
    • Your interest in the topic.
    • The availability of good background information.
    • Your likelihood of successfully advancing current understanding.
    • The possibility of advancing foundational technologies or finding practical applications.
    • Can your proposal be carried out in a reasonable amount of time and with non-infinite resources?
    • Take advantage of downtime in lecture and lab to discuss your research ideas with Prof. Belcher and the teaching faculty.
    • Please note: The idea you submit for this assignment does not have to be the idea you present at the end of Module 3. It is okay if you change directions and decide to pursue other research questions during the process of developing your proposal but please finalize your idea soon.

Due M3D4

  1. Consider the feedback you and your co-investigator received in the peer review exercise and begin to refine your research proposal by sharing a page (i.e. wiki, Googledoc, Benchling) to collect your ideas and resources (you can do this on one page with your partner or split the effort and each turn in an individual page).
    • Keep in mind that your presentation to the class will ultimately need:
      • a brief project overview
      • sufficient background information for everyone to understand your proposal
      • a statement of the research problem and goals
      • project details and methods
      • predicted outcomes if everything goes according to plan and if nothing does
      • needed resources to complete the work
    • For this assignment, please submit a printed copy of your research page, making sure it defines your general topic (background and significance), your specific idea (research gap and general approach), and two or more references you've collected and summarized.
  2. For this module, you will also prepare a short Mini-report with your partner. To get you started, work with your laboratory mate to prepare an outline of the Background and Approach section for this assignment. Keep in mind your background should reference previous scientific work so there should also be a works cited or references section to this outline.
    • Review the assignment details and carefully consider the questions specified within the evaluation criteria as you craft the Background and Approach section.

Due M3D5

  1. Read the introductory material for M3D5, and then, based on the mass of the cathode you constructed, determine the current to apply in order to fully discharge the battery in 10 hours. Use the loading factor of 17.8 mA/g, a value that is in accordance with cathodes tested during the pilot experiments for this module, and assume 63% of the mass you measured for the nanowires is active material in the cathode.
    • Remember, when you generated your cathode material your composition was 70% active material (nanowires), 25% Super P, and 5% PTFE. You also need to account for the proportion of phage in your active material, which we will assume is 10%. With these values taken into account, your cathode is composed of 63% active material.

Wrapping up M3

  1. The Research proposal presentation slides are due to Stellar by 1 pm on Thursday, May 11th or Friday, May 12th according to your laboratory section.
  2. Please remember to contribute your reflections, comments, and ideas to the 20.109 class blog by 10 pm on Thursday, May 11th or Friday, May 12th according to your laboratory section.
  3. The Mini report is due by 10 pm on Tuesday, May 16th or Wednesday, May 17th according to your laboratory section.