Unanswered Questions

79 questions with no upvoted or accepted answers
18
votes
0answers
1k views

Research funding for health benefits by coffee trade associations

How much funding is provided by the coffee industry for research on the health benefits of coffee? I came across a statistic that surprised me by its meagerness. According to their website, the ...
6
votes
0answers
134 views

Empirical data on reuse of grounds, by flow and filter

We wanted to know are there quality empirically generated chemical composition tables examining the relationship between filter porosity, flow by volume per time, and grounds of different varieties?
5
votes
0answers
88 views

Slow Roasting Coffee Beans

Conventional Coffee bean roasts at around 200-240C at around 11-19mins to ensure Maillard reaction in the beans to create the familiar taste of coffee we all know today. Could we instead roast the ...
5
votes
1answer
66 views

Does hydration level change the effect of caffeine?

Apologies if this question does not belong here, it may be suit for the chemistry site, but it pertains to the consumption of coffee directly -> so here it is. Does your prior level of hydration ...
4
votes
0answers
87 views

Espresso: How much can coffee choice affect the porosity of the coffee puck?

So this has happened to me: I bought a pack of pretty well-looking coffee, using the same approach as for other coffee beans (even the ones from the same "brand") I prepared an espresso, and ...
4
votes
0answers
31 views

Does anyone know the history of the “washed process?”

Where did the washed process originate and how has it developed and progressed? And what are the different forms and variations it has taken over the years? I have a hunch that it began in Ethiopia ...
4
votes
0answers
86 views

How can I test or repair my Keurig k45 heating component?

My k-cup coffee maker has stopped making coffee. It's a Keurig K45. It will take water, activate the pump, then it will just stay on the step with the red heating light on. I've let it sit for 15 ...
3
votes
0answers
47 views

Requirements for Nel Drip Coffee

I have a question about Nel Drip coffee requirements. Recently I've been checking few blogs and articles about this type of brewing, it mostly leads to these "settings": - Old coffee beans - Coarse ...
3
votes
0answers
426 views

Manual vs Automatic espresso machine

I’m thinking of transferring to manual machine from a semi automatic machine. What are the differences between manual and semi-automatic machines? I'm interested in how difficult they are to use and ...
3
votes
0answers
713 views

Messy grounds inside of DeLonghi ESAM 2600

I've got a DeLonghi bean-to-cup machine (ESAM 2600), which I find decent in overall. But there is one very annoying issue: not all of the grounds make it from the basket into the internal waste bin. ...
3
votes
0answers
108 views

What steam wand to replace my Gaggia Carezza old machine?

I have an old model of Gaggie Carezza that can be found here. The steam wand needs to be replaced. Does anyone know which one is suitable? I have been looking at this Rancilio Silvia steam wand but ...
3
votes
1answer
83 views

Least Expensive Way to Make Decent Espresso-based Milk Drinks?

I want to know the cheapest machines to make decent espresso for my situation. Needs: I need steam for milk drinks I need the proper brewing pressure I need to use fresh ground coffee, no pods ...
2
votes
0answers
26 views

ISO Automatic French Press (grind fresh coffee, boil water)

My husband loves French Press coffee but mornings often get too busy to boil water, grind coffee, etc. I'd love to buy him an automatic machine but can't seem to find one that does French Press. I ...
2
votes
0answers
73 views

What manual grinders are good

I already have an old rok grinder and I want to upgrade it, but I am not sure what manual grinders are good. The characteristics that I am looking for are mainly: Consistency of grains and general ...
2
votes
0answers
93 views

Does L-theanine affect caffeine's half-life?

Does consuming L-theanine with caffeine, either in drink (like matcha) or in pill form, affect the half-life of caffeine? I have heard something like "L-theanine slows caffeine absorption", ...

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