maintaining lab notes - MetabolicEngineeringGroupCBMA/MetabolicEngineeringGroupCBMA.github.io GitHub Wiki
Keeping an accurate, complete and useful record of experiments, methods and data is an integrated part of science. It is also one of the biggest challenges for most scientists. Learning to keep a good notebook early on will establish good habits that will serve you throughout your career, no matter what you do outside science.
Your notebook is a permanent chronological record of what you planned, did and observed in the laboratory. The notebook is:
- An accurate account of factual details of experiments, including mistakes, thought experiments, ideas, etc.
- A complete record of procedures, reagents, data, and interpretations and hypotheses.
- Useful only if it is understandable by someone else than yourself.
The first point cannot be stressed enough. You should record all mistakes and difficulties performing an experiment. You may learn more from these failures, and your attempts to correct them, than from experiment that works perfectly the first time.
Record dates in ISO 8601 format:
.
Record as the work is performed on paper or on you computer. Record it as soon as possible, today if possible! At the latest, record the next day!
Do a weekly checkup to make sure that all experimental conditions provided and all results recorded (electronically or on paper).
How to deal with mistakes? Never use white-out, erase or write-over. Never discard or replace attached supplementary data.
On paper:
- Draw a line through all errors.
- Record a reason for the correction/edit
- Add current date to the corrected/edited data.
In the electronic lab notebook, do the same thing by adding a comment and a date and offsetting the old text to the right with a tab.
A good test of your work is the following question:
Could your colleague use your notebook to repeat your work?
Could you come back six months later, read your notes, and make sense of them?
If you can answer yes to these two questions, you are keeping a good notebook.
In the MEC group and in the LGM lab most people use:
- Benchling
- this wiki
- Photos taken with a mobile phone saved to Google photos or a similar service.
Be sure to back up your notes to dropbox or something similar for safety.
When you first start a somewhat larger project such as the construction of a new vector, write a couple of lines about the motivation and a simple outline of it, even if it seems obvious to you at the time.
Invent a title for the project (one that may run over several days or weeks!) a good title migth be plasmid_name_ISO 8601_date such as for example pGOI_2019-01-04 for the construction of the fictional "pGOI" plasmid that was started on the third of March in 2017. This title should have no whitespace, this is makes it easier to make internal links.
Make the first entry like so:
Write a short description of the project. Use pydna in a Jupyter notebook to describe the cloning strategy. Do this early in the project to catch possible strategy errors.
On day two, solid LB medium was made and a strain was streaked from the -80 freezer stock to prepare a plasmid for the project. A recipe on the MEC protocol wiki was used. Generally, if a protocol exists on the MEC protocol wiki, refer to this by a hyperlink
On day three, The plasmid stock strain was observed to have grown normally and plasmid prep is performed using the cells on the plate. A picture was taken with a cell phone to document the plate. A link to
The reason for inventing a title for the project and enclosing it in square brackets become evident for long running projects.
On the page defined by the chosen title, the mecplugins/here function can be used to list all pages where the title was used.
What if you need more than one page for a project? The paper notebooks we use have one A4 page per day. Simply add dated (ISO 8601!) blank pages to the notebook if needed.
For new procedures, create a protocol on a page of your personal wiki and refer to this. If the protocol could be useful for others, add it to the MEC protocol wiki.