Methylphenidate for the Treatment of Post-COVID Cognitive Dysfunction (Brain Fog).

A substantial number of patients develop cognitive dysfunction after contracting severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), significantly contributing to long-coronavirus disease (COVID) morbidity. Despite the urgent and overwhelming clinical need, there are currently no proven interventions to treat post-COVID cognitive dysfunction (PCCD). Psychostimulants like methylphenidate may enhance both noradrenergic and dopaminergic pathways in mesolimbic and pre-frontal areas, thus improving memory and cognition.

Egg of the Karner Blue butterfly (Lycaeides melissa samuelis): morphology and elemental analysis.

Most insect eggshells are ornately sculptured; that of the Karner Blue butterfly, Lycaeides melissa samuelis, exhibits a series of interwoven ridges and depressions. Scanning electron microscopic views of the shell show that the patterning resides in the outer chorion, while the inner vitelline membrane is relatively flat and featureless. We here describe the morphology of the egg and introduce a physical technique, use of a Dynamitron accelerator, to identify and localize elements in the eggshell.