Publications by authors named "Tsukasa Kumagai"

Article Synopsis
  • The study aimed to evaluate the risk of incomplete sealing in tracheal diverticula during intubation with different tracheal tubes, particularly focusing on tube fixation when the tube's vocal cord guide overlaps the patient’s vocal cord.
  • Researchers analyzed thoracic CT scans of patients from January 2018 to July 2020 and assessed three different tracheal tube designs for their effectiveness in sealing tracheal diverticula and avoiding bronchial intubation.
  • Results indicated that while tubes with longer lengths had a lower risk of incompletely sealing diverticula and bronchial intubation, no tube successfully met the requirements for both outcomes, raising concerns about tube fixation practices.
View Article and Find Full Text PDF

To elucidate the biological influence of space radiation, we studied the effects of long-term space flight on mutation of the bacterial ribosomal protein L gene (rpsL). We prepared dried samples of plasmid DNA and repair-deficient and wild type cells of Escherichia (E.) coli.

View Article and Find Full Text PDF

Dolichyl monophosphate (Dol-P) is involved in the attachment of carbohydrate chains to proteins in the formation of N-linked glycoprotein. We found that this compound induces apoptosis in human leukemia U937 cells. During this apoptotic execution, the increase of plasma membrane fluidity (5-20 min), reduction in mitochondrial transmembrane potential (delta psi m) and translocation of apoptosis-inducing factor (1-3 hr), caspase-3-like protease activation (2-4 hr), chromatin condensation and DNA ladder formation (3-4 hr) were observed successively.

View Article and Find Full Text PDF