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…of technical artifacts, such as pipetting errors. It also provides us with a baseline (the ‘point zero’) against which to compare and look for differences between samples. …the exceptions There…
…still experiments that require meticulous and repeated pipetting. After all, those hundreds of tubes’ worth of competent cells aren’t going to divvy themselves up! Solution: To increase efficiency, consider using…
…not a pipetting machine. Offer If you are offered a position in the USA, congratulations! However, there are a few more things you need to consider before going ahead. It’s…
…it. Proper dislodging and pipetting along with a touch of DNAase can help prevent clumps to a large extent. Unless you’re facing a cell drought, always filter your cells before…
…items. Pipetting out assays. Preparing grids for cryo-EM. Preparing histology slides. Knitting, crocheting, and cross-stitching are stress-free, chilled-out ways to improve your dexterity. And the great thing is you have…
…you’re doing). Here are some tricks to get your liquid handler under control. Pipetting 150 µl With a 100 µl Tip This one’s tricky and depends on your robot, your…
…gentle permeabilization of the cells with detergent but in the presence of serum or serum albumin to protect cells from lysis. However, these cells are still extremely fragile and pipetting,…
…to your piptte causing pipetting difficulties as well cause the sample to jump out of the agarose lanes. If this happens spin down again for a few minutes and load)…
How often have you looked at slides down the microscope and your thoughts have been miles away? Have you ever been sitting at the bench pipetting and preparing a PCR…
…if the RNA is going to be used in an enzymatic reaction!) by pipetting up and down. A 10 min incubation via water bath or heat block) at 55°C can…
…plants. Consequences of Nucleic Acid Contamination in Protein Purification 1. Increased Viscosity and Workflow Challenges Viscous lysates cause all sorts of practical bottlenecks: Inaccurate and slow pipetting Clogged sterile filters…
…library construction steps. Every pipetting step (slowly, with wide-bore tips is recommended!) can break the DNA into small fragments that can affect your sequencing results. During DNA sequencing, the presence…
…handling (pipetting, opening tubes, etc) to reduce loss and the chance for contamination. It is almost always a good idea to use low retention microcentrifuge tubes. They bind less protein than…
…prepared, the pH of your ligation mixture may lie outside of this range. You can check the pH of your ligation mixture by pipetting approximately 0.2 µL of the mix onto narrow range…
…(it should be acidic) and your skill in pipetting only the aqueous phase will result in more or less DNA contamination. Solution: The genomic DNA needs to be well homogenized,…
…care poster up in your lab? They’re free! Happy pipetting! This article was originally published May 2014. Updated and republished August 2022. References Sartorius. Cleaning and Decontamination Guide for Sartorius…
…with pipetting and running those samples! References 1. Engvall E, Perlmann P. (1971). Enzyme-linked immunosorbent assay (ELISA) quantitative assay of immunoglobulin G. Immunochemistry. 8(9):871–4 2. Wilson D, Chan D, Chang…
…offered by the career center at my school. But, I was still lost. Between all the pipetting and PCRs, I could not figure out what non-academic career I was more…
…If you pipette off some of this material when removing the aqueous phase, then you decrease the purity of your sample. If you are too timid while pipetting, then you…
…recommended for these sensitive reactions but not mandatory. Filter tips have aerosol barriers which prevent contamination from air and within the tip while pipetting. Also allot specific tip boxes for…
…happening. For instance, pipetting errors can lead to variations in response when performing serial dilutions to prepare a standard curve. Furthermore, the sensitivity of every analytical technique differs with the…
…will stop any premature setting of your matrices. Slight changes in 3D-matrix plating densities arise from common pipetting errors, which can mean inconsistent results especially if there are bubbles or…
…surfaces cause uneven surface tension, affect flow and thus produce bubbles Pores, like in columns, are prone to producing microbubbles Pipetting too quickly Tips to Avoid Bubbles Degas your buffers….
…H&E article for more details about dewaxing and rehydrating. Add your enzyme. If pipetting directly onto your slides, pre-warm your Working Solution then add it to the sections on your…
…with your bottles empty in the middle of your protocol. Schedule in plenty of extra time Opening and closing tubes, labeling, pipetting – these are all things that only take…
…for the assay with clean water. Make your 10 fold dilutions and make enough for the number of reactions plus one to account for pipetting error. Use a P10 pipettor…
…(see number 4 in that article) can happen. 7. Eating at/near the bench. Do people actually do this? They might as well be mouth-pipetting (oh, wait – they do that…
…to you to sit for long periods of time. So, what do you think? Is your work space ergo-friendly? Read more to learn about RSI thumb, and proper pipetting techniques. …
…Some might argue that this approach only measures pipetting ability, but a similar argument can be levied against the “independent experiments” definition. Both cases can only test technical variation, whether…
…be very slight than the effect of a transcriptional repressor element, for example. Variability between replicates: Variability between wells of the same experiment Pipetting: A small variation in the amount…
…which can introduce pipetting errors and finally you want to aim for a OD between 0.1 and 1 in order to get the most accurate quantitation (this is the linear…
…as evenly and quickly as possible – this helps to prevent cell clumping. Mix your detached cells gently by pipetting up and down a few times then dispense into new…
…mouth-pipetting was still acceptable. But I’m not referring to the optimization of new and cutting-edge technology here. I’m talking about techniques that are, in theory, so basic and fundamental that…
…once, the less efficient you will be; and this includes things other than the experiments. If you are listening to a podcast or music while pipetting, or carrying on a…
…least 10-20 clones). Remove 100 µL from A1 containing cells and mix with B1, pipetting up and down 3x to mix well before removing 100 µL and mixing with C1,…
…wider than 2mm. They suggest either using padded envelopes, which are not put through automatic sorting machines or pipetting the DNA into a thin-walled polyethylene tube and sealing the ends…
…with some gentle pipetting should break up any cell clumps. *PBS or phosphate buffered saline is a common buffer used in cell culture and histology. The osmolarity and ion concentration…
…of culture conditions can help with the reduced rate of growth, and gentle repeated pipetting of cell clumps should be enough to disperse them. How to Go Serum-Free Now that…
…by volume (i.e. pipetting the same volume into two centrifuge tubes and assuming they’re balanced), or by sight (ie they look like they have the same volume in them). You…
…pipette tips may seem innocuous, but variability between lots can lead to suboptimal culture environments or incorrect pipetting volumes. For example, with pipette tips, using low retention tips is advisable….
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