6 results match your criteria: "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.
Characterization of Myocardial Microstructure and Function in an Experimental Model of Isolated Subendocardial Damage.
Hypertension
August 2019
From the Charité-Universitätsmedizin Berlin, corporate member of Freie Universitaät Berlin, Humboldt-Universitaät zu Berlin, and Berlin Institute of Health, Institute of Pharmacology, Center for Cardiovascular Research, Berlin, Germany (N.B., A.F.-L., S.B., J.G., Arne Thiele, U.K.).
Article Synopsis
- - The study investigates how subendocardial damage due to hypertension impacts the structure and function of the heart, highlighting early signs of cardiac problems even in asymptomatic individuals.
- - Mice induced with subendocardial scarring showed diastolic dysfunction, changes in myocardial deformation, and increased expression of specific biomarkers, while systolic function remained normal.
- - Advanced imaging techniques indicated that alterations in myocardial microstructure, particularly in subepicardial myofibers, can serve as early indicators for subendocardial fibrosis, with high sensitivity and specificity for predicting cardiac damage.
Penetrating Foreign Bodies in Head and Neck Trauma: A Surgical Challenge.
Craniomaxillofac Trauma Reconstr
September 2018
Department of Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Berlin, Germany.
Penetrating foreign bodies of different origins in the head and neck are rare and potentially dangerous injuries, which might pose problems for their detection, primary care, and final treatment. Depending on the severity of the underlying trauma, some injuries present a higher risk for the presence of foreign bodies. Minor wounds, including common lacerations, are likely to be contaminated with loose gravel debris or dental fragments, and need to be distinguished from severe wounds caused by impalement, shootings, stabbings, and explosions.
View Article and Find Full Text PDFSupramolecular complex coupled to a metal nanoparticle: computational studies on the optical absorption.
J Phys Chem A
November 2012
Institut für Physik, Humboldt-Universitäat zu Berlin, Newtonstraße 15, D-12489 Berlin, Germany.
Absorption spectra of a supramolecular complex (SC) placed in the proximity of a spherical metal nanoparticle (MNP) are computed. A description of the absorption is used that is based on a density matrix propagation. The applied density matrix theory starts from a microscopic model including the Coulomb interaction between the SC and the MNP.
View Article and Find Full Text PDF[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.