3 Things You May Not Know About Shakers & Stirrers, Free Webinar and Questions From the Vault | Labwrench eNews | LabWrench

November 17, 2014

Product Resources

Product Resource Guide: Shakers and Stirrers

Top 3 Things You May Not Know About Shakers & Stirrers

1. The first hot plate stirrer was patented in 1917 by Richard Stringham of Utah and consisted of stationary electromagnets built into a hotplate base. When a reaction vessel such as a flask or beaker was positioned on the stirrer, a bar magnet placed in the solution rotated as a result of the magnetic field created by the electromagnets.

2. A significant problem of early twentieth century research was the risk of fire from the necessity of heating solutions using a naked flame. This problem was resolved in the 1930s by husband and wife team Glen and Ruth Morey who invented the heating mantle, a reliable and non-flammable heating device with electric resistance wires woven into a fiberglass cloth sheath.

3. The bar magnet used with the first magnetic stirrers was gradually found to be less than ideal, particularly because the iron in the magnet could react with chemicals in the solution and change the course of a reaction. To address this problem, two inventors working independently in the 1940s devised the coated magnetic stirrer bar, which was chemically inert and took no part in the ongoing reaction.

Click here to read more about choosing the right Shaker for your needs.

Product of Interest


Hach Company SL1000 Portable Parallel Analyzer 

The Hach SL1000 Portable Parallel Analyzer (PPA) performs the same tests with less than half the manual steps. Get highly accurate results, with less opportunity for errors, in a fraction of the time. Up to six parameters, tested simultaneously.

Read more about the SL1000 on the Hach Company website.


Microtrac TRI-BLUE

Meet the TRI-BLUE the only laser diffraction particle size analyzer that fully agrees with Dynamic Light Scattering data. The TRI-BLUE uses three blue laser diodes and advanced algorithms to accurately, and precisely measure size distributions of particles ranging from 10 nanometers to 700 microns. Contact Microtrac to schedule your complimentary sample analysis measured by the TRI-BLUE.

Click here to learn more about the TRI-BLUE.


Help your Colleagues

Plenty of discussions are happening on LabWrench all the time. We have many questions come in daily from users that are seeking advice from fellow users and lab professionals on LabWrench. Can you help any of these users find the answers they are looking for?

Hach Company 5500sc Silica Analyzer
How do I clear faults so I will be able to restart analyzer? Advise this member.

Labnet 311DS Fan Does Not Come On
We have a 311DS labnet, which we bought about 8 years ago. About a year ago, the fan in the back stopped working. We still use the incubator but the temperature is clearly not even and we set it to 25 degrees in order to be approximately 37 deg at the top level. I tried removing the fan to inspect but this turns out to be a bigger project than I had initially anticipated. Any advice would be appreciated. Advise this member.

Beckman Coulter LS™ 13 320 Series
Could you tell me the hardware requirements for the windows 7 version of the software? Advise this member.

Click here to view all Questions and Discussions on LabWrench.

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Company News Hot Off The Press

Bringing Photochemistry To The Bench With Vapourtec Innovation
Photochemistry is a powerful yet under-utilised synthetic technique. Recently there has been a resurgence in interest in photochemistry due to its ability to provide novel structures and alternative, greener synthetic routes. In developing the easy-Photochem, Vapourtec's aim is to bring photochemistry out of the hands of dedicated expert users and make the technique easily and safely available for general bench chemists. Read more.


Malvern Instruments Zetasizer Nano plays key role in research to develop 3D cell cultures 
Researchers at the School of Engineering and Materials Science, Queen Mary University London (QMUL), are using a Malvern Instruments Zetasizer Nano to provide particle size and charge data that is being used in the development of innovative hydrogel matrices for 3D cell culture. The Zetasizer Nano’s high performance electrophoretic light scattering capabilities are allowing researchers to better understand the nature of the electrostatic interactions between proteins and peptides. Read more.


Molecular Devices Introduces the Digidata 1550A with HumSilencer for Line Frequency Noise-Free Electrophysiology Research
Molecular Devices, a leader in bioanalytical systems for drug discovery, life science research, and bioassay development, today announced the launch of the Digidata® 1550A Low-Noise Data Acquisition System plus HumSilencer™ noise cancelling technology for the analog-to-digital conversion of biological signals measured in electrophysiology experiments.  Read more.

 Click here to view all news articles on LabWrench.

Sponsor of the Week

Thank you to Eppendorf for sponsoring our Shakers category on LabWrench

Eppendorf is a leading life science company that develops and sells instruments, consumables, and services for liquid-, sample-, and cell handling in laboratories worldwide. Its product range includes pipettes and automated pipetting systems, dispensers, centrifuges, mixers, spectrometers, and DNA amplification equipment as well as ultra-low temperature freezers, fermentors, bioreactors, CO2 incubators, shakers, and cell manipulation systems. Consumables such as pipette tips, test tubes, microtiter plates, and disposable bioreactors complement the range of highest-quality premium products.

Visit the Eppendorf website to see their full product line.

Upcoming Free Webinar


FREE Webinar:
Food and Nutrition Science

Thursday December 4, 2014
12:00 - 1:30 PM EST

 Register Now!


Questions from the Vault

We have so many questions filling our forums that sometimes questions can be missed and go without answers. Can you help us provide answers for these users with unanswered questions?

Unable to turn on Victor 3
When I turn on Victor 3 and the software, the following information appears: Unable to load Wallac 1420 Instrument communication server and/or initialize instrument. I would be pleased if someone could help me solve this problem? Advise this member.

Two absorption optical filters in one holder
We are developing a microplate-based assay that needs absorption reading in a wide spectrum range, 350-700 nm. I'm thinking of buying long pass and short pass filters and stacking them together. Did anybody do that on any of the microplate readers? Advise this member.

Cell stuck in oven
Our ASE 350 has "dropped" the cell in the oven many times and is not able to retract it without taking the whole back apart. Any idea of the cause? Advise this member.

Click here to view all Questions and Discussions on LabWrench.




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