Thanks for responding, Tony. I've studied various articles about the concepts you propound. But they quickly leave me behind. I can get the basic drift of the material but soon get lost after that. Kn

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Klaus, Thanks much for clarifying the abbreviation. I was glad to see you following the Forum. Rob

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Here are some cleaning procedures published on Diatoms of North America. They give an insight into some ways the pros do it. ( https://diatoms.org/practitioners/how-to-clean-diatom-samples ) Rob K

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Hi Keith, Just a note on centrifuges and diatom cleaning. You don't need a centrifuge, but it can definitely save some time. If you do use a centrifuge it is better to run slowly. Spinning a tube to m

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Thanks Raymond, The paper on diatoms is also on Jstor https://www.jstor.org/stable/3220458?seq=32#metadata_info_tab_contents Reading through these journals, there is a lot of practical descriptions, s

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Well, I no longer have a lab, acids or centrifuge, or have access to a SEM. I used to use the von stosch method (acid cleaning). I suggest sending live samples. I wrap wet newspaper around the sample

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Forgot to say photos #4 and #5 on that page were the results. Please scroll down to photos posted by zzffnn (myself) to see them. Thank you.

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I tried again and left for a day to let the whole thing stabilise in temperature as I thought maybe I was reading too much oxygen due to it being warmed by the reaction. At 22oC I got approx. 130-140m

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Hi, could this be down to a difference in units? lab grade hydrogen peroxide is often sold at 30%, but typically when peroxide is sold for hairdressing and domestic uses, the strength is quoted by 'vo

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Great collecting methods! A good reminder of the possibilities. ~Rob

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Kurt, Seems like we develop our own cleaning methods, but take a look in our Links section for a couple of ideas: (1) A simple, inexpensive method... and (2) Diatoms Ireland by Leszek Wolnik and frien

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hello Rob, Thanks! I just finished another one (photo in my album). The photo has a lot of stacking and merging artifacts; I may have to give it another try. Raymond Op 30-4-2012 9:40, Rob Kimmich sch

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See our Links for the abstract for this article. a known

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Bill, No worries about the paper on my account. I don't plan to pursue permanganate for now. Good to know about KNO3 as an oxidant. Amazon even sells it as a fertilizer! Seems the resulting salts migh

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Hello Charles, You are correct that I was not clear in my description. I used the word "bleach" as a verb (meaning to decolorize), not as a noun (meaning sodium hypochlorite solution). I add an oxidan

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