Cold Brew Research

Scientists recently took a deeper look into how cold brewing coffee works; the chemical changes; how to brew the perfect cup. They couldn’t meet as planned due to the Covid-19 pandemic so they had a virtual meeting.

They looked at the diffences in types of coffee used to see the different compounds left in the coffee. The looked at different ratios as well.

They found that caffeine contents and antioxidant levels were similar in hot and cold brewed batches for lighter roast beans but it varied more for medium and dark roast beans. They found the hot brewed coffee had more antioxidants in the darker beans. The darker the beans the more the difference. Also in the darker roast, the acidic content was less.

Read more:

Jody Victor: Engineering a Better Bean

Nick Brown from Daily Coffee News wrote about a new genome sequencing project – however this isn’t the human genome, but rather that of a coffee bean. Coffea arabica, to be precise. Researchers believe their work will lead to “new high-quality, adaptable coffee varieties.”

The research is being done at the University of California, Davis. University researchers collaborated with Jay Ruskey of Good Land Organics farm in California’s Central Coast Region near Santa Barbara.

23 samples of Geisha coffee trees at varied levels of development were collected from Good Land Organics to be sequenced along with 22 other Geisha samples within 13 alternative varieties. Researchers’ goal was to best understand genetic diversity within the various varieties.

The research looked at 1.19 million base pairs—to give you an idea of the magnitude of the project, that is about 1/3 of the base pairs examined in the human genome. This initial study, while one of a kind, found little genetic diversity among the samples.
The new genome sequence has been posted to, the public database for comparative plant genomics.