But that study was done on people aged 65+ for 11 weeks? I mean, sure, they didn't measure any significant changes to the brain, but that doesn't preclude changes forever. 11 weeks is not long to practice a language
Materials and Property Characterization.
From a popular US chain store, two brands of baby food containers
made of polypropylene and one brand of reusable food pouch with-
out material information on the label were purchased. The selection
of polypropylene containers was based on its widespread use in baby
food packaging. These choices aimed to showcase diverse types of baby
food packaging.
The food containers and the food pouch were analyzed for their
semicrystalline structure and thermal stability by DSC using a Q200
differential scanning calorimeter (TA Instruments, New Castle, DE).
Briefly, a small sample weighing between 3 and 8 mg was taken from
each container or pouch, placed in a DSC aluminum pan/lid assem-
bly, and crimped with a press. The samples were heated and cooled at
a rate of 10 °C/min under a nitrogen atmosphere, resulting in calori-
metric curves that indicate the heat transfer to and from the polymer
sample during the thermal cycle, which was used to monitor phase
transitions.
H u s s a i n e t a l . i n E n v i r o n . S c i . T e c h n o l . 5 7 ( 2 0 2 3 ) 5
Transmission wide-angle X-ray diffraction (WAXD) of the reusable
food pouch was performed at the 12-ID-B beamline at the Advanced Pho-
ton Source (Argonne National Laboratory), using incident X-rays with
energy 13.30 keV and a Pilatus 300k 2D detector mounted 0.4 m from
the sample. WAXD patterns of the two plastic containers were acquired
in reflection geometry with a Bruker-AXS D8 Discover equipped with a
Cu Kα lab source (λ = 1.5406 A) and a Vantec 500 area detector. In all
cases, the acquired 2D patterns were radially averaged to produce 1D
intensity (I) vs scattering vector (q) plots
It is up to the shops whether they want to accept euro or not (or any other currency), but the official currency is kroner. I know that some supermarkets (Netto) used to gladly take euro in exchange for a horrible exchange rate
Absolutely not
https://en.m.wikipedia.org/wiki/Chemotherapy