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Author: LI-COR Biosciences

A Quick and Easy Way to Merge LI‑1500 Light Sensor Logger Files

A Quick and Easy Way to Merge LI‑1500 Light Sensor Logger Files

The LI-1500 Light Sensor Logger can log data manually, continuously, daily, or over a user-defined period. Therefore, a data set for a project can consist of many separate files. For data analysis, we often need to merge all, or parts of, these files into a single file. Here are the steps to do so:

1. Start the fv7x00 File Viewer program. If you do not have it, you can download it here:

https://www.licor.com/documents/hjwlvcpawoimow3rl35ypcwkbfoq96ni

The fv7x00 File Viewer program was…

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Studying Invasive Species: the LI-6800 Trial Winner

Studying Invasive Species: the LI-6800 Trial Winner

Invasive species can alter ecosystems and food chains. None are quite like Tamarisk, also known as salt cedar. Tamarisk sucks up a ton of water and deposits salt when it sheds its leaves, making the soil inhospitable to other plants. “There’s not much left when Tamarisk comes to town,” says Randy Long, a PhD student at the University of California, Santa Barbara.

Randy’s doctoral dissertation is studying the local adaption of Tamarisk to environmental gradients, as well as interactions of…

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Software for Fitting Photosynthetic CO2 or Light Response Curves

Software for Fitting Photosynthetic CO2 or Light Response Curves

A frequent question from LI-COR LI-6400XT users is a request for software resources for fitting the Farquhar, von Caemmerer and Berry (FvCB) model of photosynthesis (Farquhar, von Caemmerer & Berry 1980).  There is a wealth of literature on this topic and a variety of methods developed to fit the model.  There are currently no commercial software packages available for this purpose. Several software packages are, however, freely available for fitting the FvCB model of photosynthesis. Some approaches use only gas…

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New Publications Featuring the LI-6800

New Publications Featuring the LI-6800

A paper featuring the LI-6800 Portable Photosynthesis System was recently published in Plant and Cell Physiology. This publication explores how the color of actinic light affects the estimate of the electron transport rate (ETR) when calculated from fluorescence measurements.

View the abstract for Light Quality Affects Chloroplast Electron Transport Rates Estimated from Chl Fluorescence Measurements.

By changing the proportion of red and blue in the actinic light, the authors observed a difference between true ETR (J) and ETR…

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Solar Eclipse Data from LI-COR

Solar Eclipse Data from LI-COR

On Monday, the LI-COR campus was in the path of totality for the August 21, 2017 solar eclipse. Here are data collected during the eclipse at our campus in Lincoln, Nebraska, USA. Even though cloud cover obscured our direct view of the eclipse, there were observable differences in light intensity, photosynthesis measurements, and environmental flux during totality.

The partial eclipse began around 11:37 AM CST, with totality happening from 1:02 PM to 1:04 PM. The eclipse was over by 2:37…

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