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Calvet W, Murugasen E, Klett J, Kaiser B, Jaegermann W, Finger F, Hoch S, Blug M, Busse J. Silicon based tandem cells: novel photocathodes for hydrogen production. Phys Chem Chem Phys 2015; 16:12043-50. [PMID: 24710175 DOI: 10.1039/c3cp55198a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A photovoltaic tandem cell made of amorphous silicon (a-Si) and microcrystalline silicon (μc-Si) was investigated as a photocathode for hydrogen evolution in a photoelectrochemical device. The electronic and electrochemical properties of the samples were characterized using X-ray photoemission spectroscopy (XPS) and cyclic voltammetry (CV), whereas the morphology of the surface in contact with the electrolyte was investigated by scanning electron microscopy (SEM). The electric efficiency of the tandem cell was determined to be 5.2% in a photoelectrochemical (PEC) setup in acidic solution which is only about half of the photovoltaic efficiency of the tandem cell. A significant improvement in efficiency was achieved with platinum as a catalyst which was deposited by physical vapour deposition (PVD) under ultra-high vacuum (UHV) conditions.
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Sommer O, Kaiser B, Lafenthaler H, Hergan K. Die Häufigsten: DCM und HCM. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Jeannot E, Wyler CA, Meynard A, Kaiser B, Sudre P, Alvarin J, Chastonay P. Facteurs associés à la vaccination HPV chez les jeunes filles de 13 à 14ans dans le canton de Genève, Suisse. Rev Epidemiol Sante Publique 2013; 61:513-8. [DOI: 10.1016/j.respe.2013.07.683] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 04/04/2013] [Accepted: 07/16/2013] [Indexed: 11/15/2022] Open
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Hergan K, Globits S, Schuchlenz H, Kaiser B, Fiegl N, Artmann A, Hawlisch K, Newrkla S, Gessner M, Bernt R, Schuler J, Friedrich G, Trieb T, Wolf F, Reiter G, Sorantin E, Loewe C, Gamillscheg A. [Clinical relevance and indications for cardiac magnetic resonance imaging 2013: an interdisciplinary expert statement]. ROFO-FORTSCHR RONTG 2013; 185:209-18. [PMID: 23440628 DOI: 10.1055/s-0032-1330763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
During the last years the indications of Cardiac Magnetic Resonance Imaging (CMRI) have been continuously expanded. However, the acceptance of the method by cardiologists and radiologists does not correlate with respect to the diagnostic potential. Several factors, such as expensive equipment, relatively long examination times, high technical know how and lack of remuneration, limit the application of CMRI in everyday clinical practice. Furthermore, doctors tend to apply more conventional, well established diagnostic procedures, the access to the method is still limited and there exist difficulties in the interdisciplinary collaboration. The interdisciplinary Austrian approach to Cardiac Imaging is aimed to improve the aforementioned problems and to support the implementation of CMRI in the diagnostic tree of cardiac diseases thus enabling a cost efficient management of patients in cardiology.
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Chi KN, Tolcher A, Lee P, Rosen PJ, Kollmannsberger CK, Papadopoulos KP, Patnaik A, Molina A, Jiao J, Pankras C, Kaiser B, Bernard A, Tran N, Acharya M. Effect of abiraterone acetate plus prednisone on the pharmacokinetics of dextromethorphan and theophylline in patients with metastatic castration-resistant prostate cancer. Cancer Chemother Pharmacol 2012; 71:237-44. [PMID: 23064959 DOI: 10.1007/s00280-012-2001-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Accepted: 09/29/2012] [Indexed: 10/27/2022]
Abstract
PURPOSE To assess the effect of abiraterone acetate plus prednisone on the pharmacokinetics of dextromethorphan HBr (CYP2D6 substrate) and theophylline (CYP1A2 substrate) in patients with metastatic castration-resistant prostate cancer (mCRPC). METHODS Men with progressive metastatic mCRPC who failed gonadotropin-releasing hormone therapy and ≥1 lines of chemotherapy were enrolled. Patients received two doses of dextromethorphan HBr-30 mg (n = 18; group A) or theophylline-100 mg (n = 16; group B) under fasting conditions; one dose on cycle 1, day -8, and the other dose on cycle 1, day 8. Only patients with extensive CYP2D6 metabolizing status were assigned to group A. All patients received continuous daily oral abiraterone acetate (1,000 mg) plus prednisone (10 mg) starting on cycle 1, day 1. RESULTS Coadministration of abiraterone acetate plus prednisone increased the systemic exposure of dextromethorphan by approximately 100%. Ratios of geometric means for maximum plasma concentration (C(max)) (275.36%) and area under plasma concentration-time curves from time 0 to 24 h (AUC(24h)) (268.14%) of dextromethorphan were outside the bioequivalence limit. The pharmacokinetics of theophylline was unaltered following coadministration of abiraterone acetate plus prednisone. Ratios of geometric means [C(max); 102.36% and AUC(24h); 108.03%] of theophylline exposure parameters were within the bioequivalence limit. The safety profile of abiraterone acetate was consistent with reported toxicities. CONCLUSION Abiraterone acetate plus prednisone increased the exposure of dextromethorphan, suggesting a need for caution when coadministrating with known CYP2D6 substrates. The pharmacokinetics of theophylline was unaffected when coadministered with abiraterone acetate plus prednisone.
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Kaber G, Kaiser B, Baumgärtel-Allekotte D, Rauch B, Nossmann S, Heim K, Weber A, Nagy N, Fischer J, Schrör K. Antagonism of the antithrombotic and anti-atherosclerotic actions of aspirin by rofecoxib in the cholesterol-fed rabbit. Br J Pharmacol 2012; 164:561-9. [PMID: 21457221 DOI: 10.1111/j.1476-5381.2011.01392.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Most patients at elevated cardiovascular risk receive long-term aspirin (ASA) anti-platelet treatment. The present study specifically addresses the pharmacological interactions between selective COX-2 inhibitors and ASA and the possible consequences for the thrombotic risk during long-term treatment. EXPERIMENTAL APPROACH New Zealand white rabbits were fed a standard laboratory diet supplemented with 1% cholesterol (CON) for 12 weeks. Age-matched control rabbits were fed the same standard diet without addition of cholesterol (SD). Rabbits were randomly assigned to one of the following groups: rofecoxib (ROFE, 25 mg·kg⁻¹, bid), acetylsalicylic acid (ASA, 5 mg·kg⁻¹, bid) or a combination of both (ASA + ROFE). At the end of the feeding period, the severity of atherosclerotic plaque formation was assessed in the aorta. Thrombus formation was assessed in the left carotid artery using a modified Folts procedure. KEY RESULTS Treatment of cholesterol-fed rabbits with ASA significantly reduced plaque formation. This reduction in lesion size was not observed in animals treated with the combination of rofecoxib and ASA. In the modified Folts model, treatment with either rofecoxib or ASA increased the total blood flow above that of untreated animals. This increase was statistically significant in the case of ASA, while cotreatment with rofecoxib abolished this ASA effect completely and reduced the total flow rate to the levels seen in untreated hypercholesterolaemic controls. CONCLUSIONS COX-2 inhibition by rofecoxib attenuates the antithrombotic and anti-atherosclerotic effects of ASA during long-term treatment in cholesterol-fed rabbits.
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Lamprecht B, Porsch P, Wegleitner B, Strasser G, Kaiser B, Studnicka M. Electromagnetic navigation bronchoscopy (ENB): Increasing diagnostic yield. Respir Med 2012; 106:710-5. [PMID: 22391437 DOI: 10.1016/j.rmed.2012.02.002] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Revised: 02/03/2012] [Accepted: 02/06/2012] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To determine factors associated with diagnostic yield of ENB. METHODS In 112 consecutive patients referred to our department between March 2010 and December 2010 the diagnostic work-up for solitary pulmonary lesions included a FDG-PET-CT scan, and ENB in combination with ROSE. The final diagnosis was confirmed by histopathological evaluation of specimen obtained either by ENB, or - if ENB was not diagnostic - by CT-guided fine needle aspiration or surgery. RESULTS Thirty-seven (33%) subjects were female, mean age was 66.7 (±1.04) years. The mean diameter of lesions was 27mm (range: 6-46mm). In 83.9% the combination of PET-CT, ENB, and ROSE established a correct diagnosis, as defined by the definite histopathological result. 15.2% (17/112) of lesions were benign, and 84.8% (95/112) were malignant. For 112 procedures we observed a steep learning curve with a diagnostic yield of 80% and 87.5% for the first 30 and last 30 procedures, respectively. The diagnostic yield in lesions ≤20mm and >20mm in diameter was 75.6% and 89.6% (p=0.06), respectively. No significant difference in diagnostic yield was seen depending on lung function, and the localization of the lesions. Two cases (1.8%) of pneumothorax were seen during and up to 24h after bronchoscopy, none of them required a chest tube. CONCLUSION Diagnostic yield increased with experience but was independent from the size of the lesion, the localisation in the lungs, and lung function. The diagnostic yield of ENB can be as high as for CT-guided transthoracic biopsies but carries a significantly lower complication rate.
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Seliger C, Turmanidze N, Schmid E, Wiethölter H, Boy S, Bogdahn U, Kaiser B, Schlachetzki F. Three cases of stroke in patients with atypical presentation of type a aortic dissection--potential of neurosonography in the early diagnosis of atypical stroke. ULTRASCHALL IN DER MEDIZIN (STUTTGART, GERMANY : 1980) 2011; 32:619-621. [PMID: 21894602 DOI: 10.1055/s-0031-1281718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
MESH Headings
- Adult
- Aged
- Aortic Aneurysm, Thoracic/classification
- Aortic Aneurysm, Thoracic/diagnostic imaging
- Aortic Aneurysm, Thoracic/surgery
- Blood Vessel Prosthesis Implantation
- Carotid Artery, Internal, Dissection/diagnostic imaging
- Carotid Artery, Internal, Dissection/surgery
- Diagnosis, Differential
- Echocardiography
- Emergencies
- Humans
- Male
- Marfan Syndrome/diagnostic imaging
- Sensitivity and Specificity
- Stroke/diagnostic imaging
- Stroke/surgery
- Subclavian Artery/diagnostic imaging
- Subclavian Artery/surgery
- Ultrasonography, Doppler, Color
- Ultrasonography, Doppler, Transcranial
- Vertebral Artery Dissection/diagnostic imaging
- Vertebral Artery Dissection/surgery
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Rademann K, Kaiser B, Rech T, Hensel F. Photoelectron-Photoion-Coincidence Spectra of the Monomer and Dimer of Potassium in a Seeded Molecular Beam. ACTA ACUST UNITED AC 2011. [DOI: 10.1524/zpch.1989.161.part_1_2.145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wollmann CG, Globits S, Ameri L, Thudt K, Kaiser B, Salomonowitz E, Mayr H, Wilkoff B, Styperek R, Jumrussirikul P, Mirro M, Wong W, Ha K, Healey J, Kaufman ES, Nair GM, Armaganijan LV, Divakaramenon S, Mairesse GH, Brandes A, Crystal E, Tomassoni G, Ryu K, Muir M, O'brien E, Hesselson A, Greenberg S, Hamati F, Styperek R, Alonso J, Peress D, Lee L, Bolanos O, Burger H, Opalka B, Goebel G, Ehrlich W, Walther W, Ziegelhoeffer T, Milasinovic G, Quartieri F, Compton S, Kristiansen N, Li P, Ramza B, Dovellini EV, Michelucci A, Trapani M, Buonamici P, Valenti R, Antoniucci D, Hero M, Guenoun M, Ferrer Hita JJ, Rodriguez-Gonzalez A, Machado-Machado P, Perez-Hernandez LM, Raya-Sanchez JA, Lara-Padron A, Bosa-Ojeda F, Marrero-Rodriguez F, Luedorff G, Grove R, Wolff E, Thale J, Kranig W, Niazi I, Ryu K, Choudhuri I, Akhtar M, Jais P, Maury P, Reddy VY, Neuzil P, Morgan K, Bordachar P, Ritter P, Haissaguerre M, Doering M, Braunschweig F, Gaspar T, Eitel C, Wetzel U, Nitsche B, Piorkowski C, Hindricks G, Gras D, Boulogne E, Simon M, Abraham W. Flash Presentations II. Europace 2011. [DOI: 10.1093/europace/eur218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Shimizu T, Tolcher AW, Papadopoulos KP, Beeram M, Rasco DW, Smith LS, Gunn S, Smetzer L, Mays TA, Kaiser B, Alvarez C, Mangold GL, Patnaik A. The clinical effect of the dual-targeting strategy involving PI3K/AKT/mTOR and RAS/MEK/ERK pathways in first-in-human phase I study: The START Center experience. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.2502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Kaiser B. Beispiele der Einbindung des Gesundheitsamtes in die Praxis der UVP. DAS GESUNDHEITSWESEN 2011. [DOI: 10.1055/s-0031-1274442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rademann K, Ruppel M, Kaiser B. Clusters of Divalent Elements: Electronic Properties of Cdx-Aggregates. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19920960925] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lamprecht B, Schirnhofer L, Kaiser B, Buist S, Studnicka M. Non-reversible airway obstruction in never smokers: Results from the Austrian BOLD study. Respir Med 2008; 102:1833-8. [DOI: 10.1016/j.rmed.2008.07.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2008] [Revised: 06/30/2008] [Accepted: 07/09/2008] [Indexed: 10/21/2022]
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Becker W, Kaiser B, Luther S, Otremba H. Feuchteschäden in Wohnräumen: gesundheitliche, umweltbezogene und soziale Aspekte – Kleinräumige Erhebung aus dem Gesundheitsamt Bremen. DAS GESUNDHEITSWESEN 2008; 70:636-9. [DOI: 10.1055/s-0028-1100393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Daif J, Kotak A, Kaiser B, Chudnoff S, Levie M. Complications Associated with Hysteroscopic Sterilization; a Critical Review of the Literature and Review of the MAUDE Database. J Minim Invasive Gynecol 2008. [DOI: 10.1016/j.jmig.2008.09.309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chudnoff S, Levie M, Daif J, Kaiser B. The Need for Paracervical Block in Office-Based Hysteroscopic Sterilization: A Double-Blind, Randomized, Placebo-Control Study. J Minim Invasive Gynecol 2008. [DOI: 10.1016/j.jmig.2008.09.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Levie M, Chudnoff S, Daif J, Kaiser B. Hysteroscopic Placement of Essure Device in an Office Setting: A Critical Analysis. J Minim Invasive Gynecol 2008. [DOI: 10.1016/j.jmig.2008.09.299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Turra M, Waldschmidt B, Kaiser B, Schäfer R. An improved time-of-flight method for cluster deposition and ion-scattering experiments. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:013905. [PMID: 18248048 DOI: 10.1063/1.2834874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A molecular beam apparatus has been developed for deposition and scattering experiments of size-selected clusters. The new setup combines a bimetallic laser ablation cluster source with a collinear time-of-flight mass spectrometer. Mass selection is achieved with a pulsed electrostatic mirror. A significantly improved transmission in combination with a reduction of the kinetic energy distribution of the mass selected clusters has been obtained. Without further modification of the apparatus, surface-induced dissociation of mass selected tin clusters has been investigated, demonstrating the possibility to combine cluster beam deposition and scattering experiments.
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Levie M, Chudnoff S, Kaiser B, Levy B, Snyder D. 176: Multicenter Trial of Hysteroscopic Sterilization in an Office Setting Under Local Anesthesia: Patient Assessment of Procedural Pain and Satisfaction. J Minim Invasive Gynecol 2007. [DOI: 10.1016/j.jmig.2007.08.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Chudnoff S, Kaiser B. 60: Update On: Historical Risk Factors, Are They a Contraindication for Office Essure? J Minim Invasive Gynecol 2007. [DOI: 10.1016/j.jmig.2007.08.240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kaiser B, Levie M, Chudnoff S, Daif J. 158: An Update On Hysteroscopic Placement of Essure Device in an Office Setting: Successful Placement and Occlusion Rates. J Minim Invasive Gynecol 2007. [DOI: 10.1016/j.jmig.2007.08.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Cuberes MT, Stegemann B, Kaiser B, Rademann K. Ultrasonic force microscopy on strained antimony nanoparticles. Ultramicroscopy 2007; 107:1053-60. [PMID: 17570590 DOI: 10.1016/j.ultramic.2007.05.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Ultrasonic force microscopy (UFM) is used to resolve the elastic nanostructure of strained antimony (Sb) particles. These nanoparticles were formed by aggregation and spontaneous rapid crystallization of thermally deposited Sb onto the (0001) basal planes of highly oriented pyrolytic graphite (HOPG) and molybdenum disulfide (MoS(2)). UFM reveals clear contrast within individual nanoparticles, which can be attributed to differences in the local stiffness. This interpretation is confirmed by transmission electron microscopy (TEM) images, in which bending contours prove the existence of strained regions within the nanocrystals.
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Kaiser B, Korell M. Gibt es eine „richtige“ Ernährung für Frauen mit Endometriose? Geburtshilfe Frauenheilkd 2007. [DOI: 10.1055/s-2007-989159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Fareed J, Hoppensteadt D, Maddineni J, Kaiser B, Walenga J. ARGATROBAN IS CAPABLE OF PASSING THROUGH THE BLOOD BRAIN BARRIER. POTENTIAL IMPLICATIONS IN THE MANAGEMENT OF THROMBOTIC STROKE. J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb01582.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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