<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><span style="background-color: rgba(255, 255, 255, 0);">Would you happen to have a comprehensive list of nectar refractory indices (nD values) for a range of native US plant families?</span></div><div>Rick Johnstone<br><br>Rick Johnstone </div><div><br>On Apr 6, 2015, at 10:24 AM, Peter Bernhardt <<a href="mailto:bernhap2@slu.edu">bernhap2@slu.edu</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">What it be possible to have a discussion on the merits of different models of hand-held sugar refractometers? This is the time of year in which our lab receives inquiries on what we use and what they should order.<div><br></div><div>Since 1985, our lab has remained faithful to the hand-held sugar refractometer models produced by Bellingham and Standley. We've ordered them through Epic and try to keep up with changes in models. We currently use the Eclipse 45-03 for nectars removed from flowers under bridal veil or muslin. We've been happy with Eclipse models over the years as they provide a reading with only 2 micro liters of fluid. We are currently writing up our paper on pollination of Asclepias meadii. Nectar extractions were easy as a first day flower usually secreted about 5 micro liters. Yes, our lab also sends out dried nectar spots for biochemical analyses (sugars and amino acids) when the budget permits.</div><div><br></div><div>However, I recently received an inquiry about a refractometer to measure sugar concentrations removed from the crops of honeybees. We've never done that in our lab. I notice that Bellingham and Standley offer a "honey and water" model. I've never used it and wonder if anyone here has?</div><div><br></div><div><a href="http://www.bellinghamandstanley.com/ltd/handheld_tech.html">http://www.bellinghamandstanley.com/ltd/handheld_tech.html</a><br></div><div><br></div><div>Peter</div></div>
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