3 results match your criteria: "1 Humboldt-Universität zu Berlin[Affiliation]"
Dual-Site Model for Calculations of Gibbs Free Energies and Enthalpies of Adsorption: Methane in Zeolite Mobile Five (H-MFI).
J Phys Chem Lett
December 2022
Institute of Chemistry, Humboldt-Universitaät zu Berlin, Unter den Linden 6, 10099Berlin, Germany.
Quantum chemical hybrid MP2:PBE+D2 calculations in combination with molecular statistics are employed to calculate enthalpies and Gibbs free energies of adsorption for CH at Brønsted acid sites [bridging Si-O(H)-Al groups] and silica wall sites (Si-O-Si) of the proton form of zeolite MFI (H-ZSM-5) and its purely siliceous analogue Silicalite-1. A Langmuir model is adopted to calculate the amounts of CH adsorbed at each type of site from the Gibbs free energies. The combination of these results according to the ratio of silica wall sites and Brønsted acid sites in the sample yields adsorption isotherms for zeolites with different Si/Al ratios.
View Article and Find Full Text PDFTherapeutic Phlebotomy in Patients with Grade 1 Hypertension: A Randomized-Controlled Trial.
J Integr Complement Med
June 2022
Institute of Social Medicine, Epidemiology and Health Economics, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universitaät zu Berlin, Berlin, Germany.
Article Synopsis
- - The study aimed to explore how therapeutic phlebotomy (bloodletting) affects blood pressure in patients with grade 1 hypertension who are not on medication, comparing results between an intervention group and a control group over 8 weeks.
- - Results showed that while the intervention group had a slight decrease in mean arterial pressure (-1.12 mmHg), the control group experienced a slight increase (0.43 mmHg), suggesting minimal overall impact of phlebotomy on blood pressure.
- - Although some patients in the intervention group experienced mild adverse events like dizziness and anemia, there were no serious complications, indicating that the procedure is generally safe but may require more in-depth clinical trials for conclusive results.
[Percutaneous "high risk" angioplasty with prophylactic cardiopulmonary support. High risk PTCA with mechanical circulatory support].
Z Kardiol
February 1997
I. Medizinische Klinik Charité, Humboldt-Universitáat zu Berlin.
Article Synopsis
- The study explored the effectiveness of assisted percutaneous transluminal coronary revascularization in 39 patients (mostly middle-aged men) who had serious heart issues and were not good candidates for traditional surgery.
- Mechanical support methods used included intraaortic balloon counterpulsation, extracorporeal circulation, and hemopump systems.
- Results showed significant improvements in heart function and decreased angina symptoms, with a low hospital mortality rate of 2.6%, despite some serious complications.