E. Coli K-12 MG1655 operon thrLABC by Ciro Santilli 35 Updated +Created
We can find it by searching for the species in the BioCyc promoter database. This leads to: biocyc.org/group?id=:ALL-PROMOTERS&orgid=ECOLI.
By finding the first operon by position we reach: biocyc.org/ECOLI/NEW-IMAGE?object=TU0-42486.
That page lists several components of the promoter, which we should try to understand!
After the first gene in the codon, thrL, there is a rho-independent termination. By comparing:we understand that the presence of threonine or isoleucine variants, L-threonyl and L-isoleucyl, makes the rho-independent termination become more efficient, so the control loop is quite direct! Not sure why it cares about isoleucine as well though.
TODO which factor is actually specific to that DNA region?
Meteorology by Ciro Santilli 35 Updated +Created
SQL parallel update example by Ciro Santilli 35 Updated +Created
sigoden/node-express-realworld-example-app by Ciro Santilli 35 Updated +Created
Seemed to just work at 68bbadfd77f679f0df0fcd0de5bceb9c37b1144a Ubuntu 20.10, was forked from parent project in 2018.
Program Raspberry Pi Pico W with C by Ciro Santilli 35 Updated +Created
Ubuntu 22.04 build just worked, nice! Much feels much cleaner than the Micro Bit C setup:
sudo apt install cmake gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib

git clone https://github.com/raspberrypi/pico-sdk
cd pico-sdk
git checkout 2e6142b15b8a75c1227dd3edbe839193b2bf9041
cd ..

git clone https://github.com/raspberrypi/pico-examples
cd pico-examples
git checkout a7ad17156bf60842ee55c8f86cd39e9cd7427c1d
cd ..

export PICO_SDK_PATH="$(pwd)/pico-sdk"
cd pico-exampes
mkdir build
cd build
# Board selection.
# https://www.raspberrypi.com/documentation/microcontrollers/c_sdk.html also says you can give wifi ID and password here for W.
cmake -DPICO_BOARD=pico_w ..
make -j
Then we install the programs just like any other UF2 but plugging it in with BOOTSEL pressed and copying the UF2 over, e.g.:
cp pico_w/blink/picow_blink.uf2 /media/$USER/RPI-RP2/
Note that there is a separate example for the W and non W LED, for non-W it is:
cp blink/blink.uf2 /media/$USER/RPI-RP2/
Also tested the UART over USB example:
cp hello_world/usb/hello_usb.uf2 /media/$USER/RPI-RP2/
You can then see the UART messages with:
screen /dev/ttyACM0 115200
TODO understand the proper debug setup, and a flash setup that doesn't require us to plug out and replug the thing every two seconds. www.electronicshub.org/programming-raspberry-pi-pico-with-swd/ appears to describe it, with SWD to do both debug and flash. To do it, you seem need another board with GPIO, e.g. a Raspberry Pi, the laptop alone is not enough.
Malus' Law by Ciro Santilli 35 Updated +Created
Matches the quantum superposition probability proportional to the square law. Poor Étienne-Louis Malus, who died so much before this was found.
DNA extraction by Ciro Santilli 35 Updated +Created
The first thing we had to do with the sample was to extract the DNA present in the water in a pure form for the PCR.
We did that with a Qiagen DNeasy PowerWater Kit.
As you would expect, this consists of a purification procedure with several steps.
In each step we take a physical or chemical action on the sample, which splits it into two parts: the one with the DNA and the one without.
We then take the part with the DNA, and throw away the one without the DNA.
The first steps are coarser, and finer and finer splits are done as we move forward.
Equipment used by Ciro Santilli 35 Updated +Created
Giant-impact hypothesis by Ciro Santilli 35 Updated +Created
Microwave oven by Ciro Santilli 35 Updated +Created
Video 1.
How Microwaves Work by National MagLab (2017)
Source. A bit meh. Does not mention the word cavity magnetron!
Video 2.
How a Microwave Oven Works by EngineerGuy
. Source. Cool demonstration of the standing waves in the cavity with cheese!
Neon lamp by Ciro Santilli 35 Updated +Created
DT_FLAGS_1 by Ciro Santilli 35 Updated +Created
Seems to be a GNU Binutils extension
Young's interference experiment by Ciro Santilli 35 Updated +Created
List of continents by Ciro Santilli 35 Updated +Created
Wightman axioms by Ciro Santilli 35 Updated +Created

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