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This is probably not very important in brewing where the fermentations are much less stressful but in wine we've learnt not to use DAP in early additions. The reason for this is that yeast has to make transport enzymes for some amino acids in response to their presence but the transport enzymes...

Ekwip is indeed a brand of filtration equipment, common in the wine industry. I think it's an old scavenger: when you blow down an earth filter because it's packed out or blocked up, some wine remains on the inlet side. If the product value is high this is run back through a scavenger to...

The gas will be fine but I'd be worried about the safety of the bottles, especially if you don't know where they've been stored. The reason bottles have a date code is to ensure that the bottle itself isn't compromised by corrosion etc.

See post #5 in this thread.

Pressure rating for a cylindrical structure is very easy to calculate: material yield strength x wall thickness / internal radius. Glass strength is often taken as 30 MPa but heavily derated if reliability is important, often by a factor of 4.

All of it. Yeast will take up oxygen whenever they can. According to this paper, the oxygen consumption rate is of the order of 8 mg O2 / g yeast / hour. I add 250mg / l yeast to my bottle conditioned beers, that would take up the 5 mg/l expected oxygen in 2 1/2 hours. BTW I deliberately add...

I've seen one of those before but damned if I can remember where. I think it's some kind of media trap, hence the wingnuts on the head that has two parts. If it is the thing that I remember, the inner one of those two parts has threaded holes so the whole thing stays assembled when you remove...

That's excellent. Marvellous Oxygen Xenobiotic Yardstick = MOXY. In my mind's eye I see in Showcard Font: Professor Kelly's Marvellous Oxygen Xenobiotic Yardstick Cures all ills: fermentile dysfunction, premature attenuation, lack of yeast libido,&c &c

The name was originally a reference to the primary use for the device which is microoxygenation in wine, known colloquially as Mox. I have registered the domain name Electromox but was calling it Moxie for short. It's also a common US slang term roughly equivalent to UK "bottle". Since I think...

You could always just use a timer plug. BTW I do not recommend leaving the unit in the fermenter once its job is done. Get it out, clean it and pack it away. The above life calculation for the anode is only valid if it isn't scratched or scuffed: the platinum is very hard and durable but very...

There is a known degradation rate of the platinum coating, which is calculated in thousands of hours per ampere per cm^2. Given that I'm putting 240 mA across 16 cm^2 I could expect >30,000 hours of anode life in a sulphuric acid bath (that's the standard life calculation for anodes used in...

I'm OK with that idea but I don't want to push things with the mods and also I think it's advisable to wait until I get feedback from beta testers and make any modifications that might come out of that process.

At some point yes, but that increases the cost as I have to use larger electrodes and controlled current source. The current model is designed for 10 - 30 litres but can be pushed higher or lower with no performance deficit. I decided that the easy way to do this was to remove all adjustability...

No. Temperature affects the solubility of oxygen but that matters litttle: the idea behind this technique is to pitch the wort first and lower the anode to the bottom of the fermenter: since the rate at which yeast can absorb oxygen is higher than the rate at which the unit produces it, almost...

My bad for missing the reference. Yes, the grand trifecta of patentability: novelty, utility and non-obviousness.Hopefully I've ticked all three boxes. Time will tell.

Each to his own, I poured several beers down the sink today because they were stale. I hate stale beer. We've been riding hills in the Yarra Valley this weekend, stopped at Dan's in Ringwood on the way back to check their stocks of the excellent 2012 rieslings they recently put on cellar...

As a side note: glycols can be toxic but this is usually because of the oxidation products formed from them in the body. Ethylene glycol (ethandiol) oxidises to glycolic acid (hydroxyethanoic acid) and thence to oxalic acid (ethandioc acid) which is toxic. Propylene glycol (propan 1,2 diol)...

One of my professors was a specialist in herbicides. He noticed that a particular dog pissed on the lawn every day and the lawn promptly died, so he went to the extent of capturing the dog's urine and analysing it for potential herbicides. Turned out that the dog's urine was very concentrated...

If you want to make a Corona clone you need to employ a Mexican to drink your product first. Failing this, put it in clear bottles and expose them to blue light to get the right amount of skunkiness. Same effect.

You actually get more polyphenol (tannin) extraction if your efficiency is low, because you have a larger amount of polyphenol containing material exposed to the same temperature profile. The polyphenols are contained primarily in the husks which are thin so they will extract more efficiently...