23 Questions 28 Answers 0 Followers
Questions related from André Leonhardt
Hello, I‘ve got a problem that bugs me for two weeks now but I‘m clueless as to how to calculate the pH so I hoped someone here could assist me. Say we have got a salt made of of a weak base (pkb...
05 February 2021 2,599 4 View
Hello, I am looking an all solid state halogenide ion conductor (conducting halogenides, not necessarily based on them) especially iodide ions for a solid state battery. Poorly the research seems...
09 March 2020 8,339 3 View
Hello, I am currently doing quite some research on Solenopsis invicta, mainly because ant keeping is an interesting hobby of mine (even though normally not my field of research) and I think that...
16 October 2019 846 2 View
Hello, I have read about different Reticulitermes spp. (for example virginicus) known to be able to reproduce by parthenogenesis. Since I am highly interested in doing my own, private observations...
29 June 2019 9,467 0 View
Hello, I wanted to find some information about the ant species Liometopum microcephalum but poorly didn‘t find any... My questions are: Is this Dolichoderinae species polygynous Do they have a...
23 June 2019 1,695 3 View
Hello, I have been working on ascorbic acid fuel cells for quite some time and I wonder if it might not be possible to reduce dehydroascorbic acid in aquous solution to ascorbic acid with...
15 April 2019 3,539 0 View
Hello, as already mentioned in a previous question, I want to make my own protein food jelly for my ants. I can exclude a high sugar level as preservative, so someone told my I should try low ph...
11 January 2019 3,989 2 View
Hello, from time to time I work privately on biological projects, so far I worked mostly on hydra vulgaris, oligactis, various bacteria and fungi, this time I am interested in the neonothopanus...
19 December 2018 4,534 3 View
Hello, I have built a redox flow (fuel) cell that uses K3[Fe(CN)6] as oxidant instead of MnO2 because of its higher reduction voltage. When MnO2 is reduced, it is easily regenerable by air...
07 September 2018 4,260 4 View
Hello, I need to make a cheap fuel cell membrane that is either highly selective to OH- or protons, but preferrably OH-. Also it should have almost no electrolyte crossover. It would be best if...
02 September 2018 3,882 7 View
Hello, recently I found out, a possibility to make a cheap high-power fuel cell that uses sodium ascorbate as fuel, because it readily oxidizes with dissolved air. Even thought it works great, I'd...
01 September 2018 8,369 1 View
Hello, I just inoculated a new E.coli culture (k12 Gal+ strain) and I recognized something I can't explain, the bacteria lawn (by excessive water) has a branchy appearance, any explanations for...
30 July 2018 2,871 5 View
Hello, I want to work with selective bacteriophages and so I decided to use the U3 (selective for e.coli K12 Gal+), but poorly I can't find any further Informations about it other than it has a...
18 July 2018 1,507 4 View
Hello, For a titer determination of the U3 e.coli k12 Gal+ phage, I need to know what the maximum salinity for the k12 Gal+ strain is. Poory I can't find any research on this. Any experiences? I...
18 July 2018 6,305 1 View
Hello, Puh, this question is very hard to explain, so I try my best: I want to combine all my previous biology projects in a sort of organic computing device (neuronal network miniking), that...
25 June 2018 8,596 2 View
Hello, I want to create a self sustaining bacteria lamp using multiple microorganisms that live in symbiosis together. I heavily refer this project to the “biobulb“. My plan is using...
17 June 2018 2,592 7 View
Hello, I recently bought a genetically modified e.coli (pje202/pVIB plasmid), which is bioluminescent. I don't want to grow the e.coli on antibiotic agar forever, because the antibiotic selection...
13 June 2018 6,675 5 View
I recently bought a pre-modified e.coli bacterium containing pVIB plasmid. The plasmid is resistant to ampicillin, but I wonder if there is a possibility to grow this bacterium without selective...
10 June 2018 3,187 2 View
I recently bought pVIB plasmid modified e.coli (BL21 strain) and now I want to grow them on LB agar containing ampicillin for selective pressure. I wondered, whether there is a chance due to...
10 June 2018 6,333 3 View
Hello, I want to take a timeout from my other project and now I am into genetically engineered bacteria. I want to use the pje202/pVIB plasmid containing e. coli. This bacterium has to grow on...
09 June 2018 7,587 2 View
Hello, I need to prepare a polyethylene glycol hydrogel, but have only limited supply to chemicals, so is there any crosslinking agent (except citric acid) that I may have access to and is able to...
20 May 2018 9,283 5 View
Hello, I want to dissolve PVA in water to get a final concentration of 10%wt. My PVA is 90%+ hydrolyzed from sigma. At the moment, I have just added the PVA (all at once) to water, but I get these...
14 April 2018 6,073 2 View
Hello, I am currently working on a redox flow battery, well sorts of, the term redox may not be completely correct. The battery uses one side highly acidic (ph 0) and one highly alkaline (ph:...
01 January 1970 9,030 2 View
