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Jacob

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About Jacob

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  1. This patent suggests using teatree oil and benzaldehyde (almond extract) as a topical bee repellent. You might want to research it a bit more before trying it though.
  2. Actually on second thought, this could probably be done by LC-IRMS, though I'm not sure who does that either.
  3. You tell me, does "amber", "light amber", "dark amber", and "extra dark amber" sound nice and lyrical?
  4. There is no direct test for total C3 sugar content, unfortunately. There are some tests offered by overseas labs for specific chemical markers found in C3 sugar syrups though.
  5. If it's not actually honey, does that mean they could put DHA and MGO in it? 🤔
  6. There are very few postdoc positions available in New Zealand. We have a pretty poor system for it really. Your best bet is probably to inquire at a Crown Research Institution (CRI) like Plant and Food Research who have a good apiculture research programme and see if they have any jobs available.
  7. I believe Terry and @Kate R went along. Terry said it was very well attended (100+ people?), with some good talks.
  8. Thanks for the info everyone. It seems like lots of people are using the a 2:1 concentration (67 brix). What about the type of sugar? White sugar versus inverted, corn syrup, etc? How many of you are heating to dissolve it?
  9. Pretty much. There was some research published in 2014 which showed that when you eat honey containing tutin, it appears in your bloodstream after 1-2 hours, then again after 10-20 hours. This suggested there were multiple chemical forms of tutin which were naturally present in the honey. You can see that paper here. Further research in 2015 conclusively showed that there honey contained additional forms of tutin called glycosides, which are tutin molecules with sugars attached to them. You can see that paper here here. I believe the MRL was reduced in 2016 in response to these pieces of research, as the 2010 standard at 2.0 mg/kg didn't account for these additional forms of tutin.
  10. Correct, a small portion of supposedly monofloral kanuka samples still pass the MPI test. These are few few and far between, and in reality they're probably half kanuka and half manuka anyway, which explains why they pass. Not sure about the crop size or and species effects.
  11. Tough question. I think the multi/mono distinction has caused more problems than it has solved, so I would consider abolishing it in favor of a single set of thresholds. Perhaps 1/1/1/100, with no DNA included. As with all of these studies, the optimum solution to the problem depends on what data you're looking at, and what compromises you're willing to accept. Currently we have a classification system which excludes most kanuka at the expense of some manuka, which is a compromise I don't think is okay.
  12. The absence of a strong correlation doesn't make them unfit as markers though, it is the classification rules give rise to that problem. If the rules were modified, the problems would largely disappear. Also as before, you can't compare that data between seasons because it's in different units.
  13. Are you sure that isn't because they are reported in different units? mg/L compared to mg/800g sugar?
  14. Correct. The change was made after MPI were supplied with some additional data for kanuka honey, so it was probably based on the amount of 2'-MAP in those particular samples. I don't know the exact rationale.
  15. It was exactly the same. The 3-PLA levels have never changed.
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