19 research outputs found
The comparison of archaeobotanical data and the oldest documentary records (14th–15th century) of useful plants in medieval Gdańsk, northern Poland
Cross section calculations for electron impact ionizationand elastic scattering from cisplatin
Total cross section for single electron-impact ionization of cisplatin
(H6N2Cl2Pt) molecule has been calculated with the
binary-encounter-Bethe (BEB) model from the ionization threshold up to 5 keV. To obtain
input data for the BEB calculations, geometric and electronic structures of the cisplatin
have been studied with quantum chemical methods. Elastic cross section for electron
collisions with cisplatin have also been evaluated using independent atom method with
static-polarization model potential for incident energies ranging from 50 to 3000 eV. The
obtained geometric structure of cisplatin is compared with available experimental and
theoretical data. Calculated cross sections have been compared with related cross sections
for selected purine and pirimidine bases
Cross section calculations for electron scattering from platinum chemotherapeutic compounds
Cross section for electron impact ionization of carboplatin, C6H12N2O4Pt, and oxaliplatin, C8H14N2O4Pt, have been calculated within binary-encounter-Bethe model for energies from the ionization threshold up to 5000 eV. Cross section for elastic electron scattering from carboplatin and oxaliplatin molecules have also been derived using independent atom method (IAM) and additivity rule for collision energies ranging from 50 eV to 3000 eV. Obtained cross sections have been compared with relevant cross sections for cisplatin molecules
Cross section calculations for electron scattering from platinum chemotherapeutic compounds
Cross section calculations for electron impact ionization and elastic scattering from cisplatin
New Fragmentation Pathways in K-THF Collisions as Studied by Electron Transfer Experiments: Negative Ion Formation
Time-of-flight (TOF) negative ion mass spectra have been obtained in collisions of 20−100 eV neutral potassium atoms with tetrahydrofuran (C4H8O), an analogue for the sugar unit in DNA/RNA. Major enhancements in O− and C2H3O− production were observed compared with earlier dissociative electron attachment (DEA) experiments. In further contrast with DEA, no evidence was observed for dehydrogenated parent anions, and three new fragment anions were detected: CH−, C2−, and C2H−. These contrasting results for potassium impact and DEA highlight significant differences in the reaction pathways initiated by the two electron delivery processes