David W. Fischer

ORCID: 0009-0006-0407-5407
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Research Areas
  • X-ray Spectroscopy and Fluorescence Analysis
  • Coastal and Marine Management
  • Electron and X-Ray Spectroscopy Techniques
  • Semiconductor Quantum Structures and Devices
  • Semiconductor materials and devices
  • Semiconductor materials and interfaces
  • Silicon and Solar Cell Technologies
  • X-ray Diffraction in Crystallography
  • Transition Metal Oxide Nanomaterials
  • Geological Studies and Exploration
  • Hydrocarbon exploration and reservoir analysis
  • Risk and Safety Analysis
  • Marine and Offshore Engineering Studies
  • Geological formations and processes
  • Economic and Environmental Valuation
  • Nuclear and radioactivity studies
  • Coastal and Marine Dynamics
  • Ultrasound and Hyperthermia Applications
  • Advanced Chemical Physics Studies
  • Fungal Biology and Applications
  • Mycorrhizal Fungi and Plant Interactions
  • Diverse Aspects of Tourism Research
  • Silicon Nanostructures and Photoluminescence
  • International Maritime Law Issues
  • Nuclear Physics and Applications

Austrian Research Institute for Artificial Intelligence
2025

Medical University of Vienna
2025

Institute of Art
2025

Kempten University of Applied Sciences
2023-2024

Hamburg University of Technology
2022-2023

Universität Hamburg
2022-2023

Brigham and Women's Hospital
2022

Massachusetts General Hospital
2022

University of Pennsylvania
2022

Equinor (United Kingdom)
2020

Noninvasive techniques for detecting acute cardiac transplant rejection are limited. We hypothesized that ultrasound contrast microbubbles targeted to the endothelial cell (EC) inflammatory marker intercellular adhesion molecule-1 (ICAM-1) would selectively bind rejecting versus nonrejecting myocardium and myocardial echocardiography can therefore detect rejection.Lipid-based were conjugated anti-rat ICAM-1 (MBICAM) or isotype control antibody (MBControl). In vitro MBICAM cultured rat ECs,...

10.1161/01.cir.0000080287.74762.60 article EN Circulation 2003-07-01

A complete molecular-orbital energy-level diagram for Ti${\mathrm{O}}_{2}$ is empirically deduced from the combined $\mathrm{Ti}{L}_{\mathrm{III}}$, $\mathrm{Ti}K$, and $\mathrm{O}K$ x-ray emission absorption band spectra. All of occupied vacant orbitals within 25 eV ${E}_{F}$ are located on a relative energy scale. The titanium $3d$, $4s$, $4p$ states oxygen $2s$ $2p$ all play important roles in chemical bonding have specific influences bands. also shown to be compatible with...

10.1103/physrevb.5.4219 article EN Physical review. B, Solid state 1972-06-01

A molecular-orbital energy-level diagram is constructed and used to interpret the metal-ion LII,III x-ray emission absorption spectra from oxides, nitrides, carbides, borides of titanium vanadium. It shown that MO model provides a more accurate description experimental results than did ionic crossover transition theory. Specific electronic transitions are assigned spectral components. Anomalous peaks which fall on low-energy side main LIII band found originate in molecular orbitals primarily...

10.1063/1.1659472 article EN Journal of Applied Physics 1970-08-01

The titanium LII, III x-ray emission and absorption spectra (λ∼27.5 Å) from pure metal, oxides, nitride, carbide, boride have been investigated using a plane-crystal vacuum spectrometer with electron-beam excitation flow-proportional counter detection. Emission were studied over wide range of accelerating voltages takeoff angles, showing that satellite self-absorption effects can significantly distort the band shapes energy positions intensity maxima. A replica spectrum be constructed solely...

10.1063/1.1655835 article EN Journal of Applied Physics 1968-09-01

The vanadium LII,III x-ray emission and absorption spectra (λ∼24 Å) from pure metal, oxides, nitride, carbide, boride have been investigated using a plane-crystal vacuum spectrometer with electron beam excitation flow-proportional detection. Emission were studied over wide range of accelerating voltages takeoff angles, showing that satellite self-absorption effects can cause gross distortion in band shapes. A replica the spectrum be constructed solely afflicted widely different amounts...

10.1063/1.1657158 article EN Journal of Applied Physics 1969-09-01

10.1016/s0022-3697(71)80093-8 article EN Journal of Physics and Chemistry of Solids 1971-01-01

An electronic structure, in terms of molecular orbitals, is suggested for the layered compound Ti${\mathrm{S}}_{2}$. This structure based on combined $\mathrm{Ti}{L}_{\mathrm{III}}$, $\mathrm{Ti}K$, $\mathrm{S}{L}_{\mathrm{II},\mathrm{III}}$, and $\mathrm{S}K$ x-ray-emission -absorption band spectra. The x-ray data appear to be compatible with optical reflectivity spectrum but at odds theoretical estimates structure. Although results are empirically conjectural they used suggest that...

10.1103/physrevb.8.3576 article EN Physical review. B, Solid state 1973-10-15

Band shapes, wavelengths, and intensities are presented discussed for the K emission spectra of oxygen fluorine from some simple oxides fluorides. It is shown that band shapes peak positions dependent upon target material which they emitted. Evidence illustrating this dependence in part due to such solid-state properties as crystal structure, valence, coordination. Results were obtained a flat-crystal vacuum spectrometer with thin window flow proportional counter using electron excitation.

10.1063/1.1695844 article EN The Journal of Chemical Physics 1965-06-01

Changes which occur in peak positions, band shapes, and intensities with oxidation are presented for the five main L emission lines from first-series transition metals. It is shown that bands shift wave-length when going metal to oxide, amount of depending on target its state oxidation. The dependence LII/LIII intensity ratio accelerating potential, valence state, atomic number also discussed. A flat-crystal vacuum spectrometer electron excitation a thin-window flow-proportional counter was...

10.1063/1.1714400 article EN Journal of Applied Physics 1965-06-01

A method for identifying tissue experiencing hypoxic stress due to atherosclerotic vascular disease would be clinically useful. Vascular endothelial growth factor-121 (VEGF121) is an angiogenic protein secreted in response hypoxia that binds VEGF receptors overexpressed by ischemic microvasculature. We tested the hypothesis could serve as markers and hence provide a target imaging such with radiolabeled human VEGF121.A rabbit model of unilateral hindlimb ischemia was created femoral artery...

10.1161/01.cir.0000079100.38176.83 article EN Circulation 2003-06-24

This encyclopaedic volume, including 1500 species and 650 illustrations, shows the diversity of mycoflora throughout all northeastern North America. It provides a reference for mushroom identification in region, has full descriptions easy-to-follow keys.

10.5860/choice.35-3844 article EN Choice Reviews Online 1998-03-01

Wavelength and intensities are reported for the Al K series using primary excitation. Included in tabulation diagram lines α1α2 β1, nondiagram α′, α3, α4, α5, α6, β′, β″, β″′. Spectra shown line positions detailed both aluminum metal oxide as target materials. Significant differences seen between spectra, especially wavelength shape of Kβ1 band, large changes noted intensity some satellite lines. The oxygen band at 23.60 Å from an anodized film is shown. only slightly asymmetrical no...

10.1063/1.1714025 article EN Journal of Applied Physics 1965-02-01

The Mα and Mβ emission spectra the MIV MV absorption have been studied for rare earth elements. It is conclusively shown that complicated multiplet structure observed in not real but is, instead, produced by sample self-absorption. This demonstrated observing over wide variations take-off angle bombarding-electron energies finally comparing detailed of both spectra. completely overlaps lines which are each found to one intensity maximum when obtained under conditions minimum Some these never...

10.1063/1.1709229 article EN Journal of Applied Physics 1967-11-01

After the EL2 absorption band at 1.2 eV is fully photoquenched [i.e., defect completely transferred from normal (EL20) to metastable (EL2*) state] it can be partially recovered by photon excitation. This EL2*→EL20 recovery exhibits peaks 0.80 and 0.90 with shoulders 0.86 0.94 eV. Comparison made previously published photon-induced photoconductivity results are used construct a modified configuration coordinate model for defect.

10.1063/1.97736 article EN Applied Physics Letters 1987-06-15

High-resolution infrared ${p}_{\frac{3}{2}}$ and ${p}_{\frac{1}{2}}$ excitation spectra are reported for the group-III acceptors boron, aluminum, gallium, indium in silicon. New lines, which believed to be due previously unresolved excited states, observed spectra. A $5{p}^{\ensuremath{'}}$ line is first time gallium spectrum. Some boron lines relabeled correspond with other feature each of defined as ${E}_{I}$, ground-state binding energy. Values measured ${E}_{I}$ 44.39, 69.03, 72.73,...

10.1103/physrevb.27.4826 article EN Physical review. B, Condensed matter 1983-04-15

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Chemical Combination on the Soft X-Ray L Emission Spectra Potassium, Chlorine, and Sulfur Using a Stearate Soap Film Crystal.D. W. Fischer L. BaunCite this: Anal. Chem. 1965, 37, 7, 902–906Publication Date (Print):June 1, 1965Publication History Published online1 May 2002Published inissue 1 June 1965https://pubs.acs.org/doi/10.1021/ac60226a029https://doi.org/10.1021/ac60226a029research-articleACS PublicationsRequest reuse...

10.1021/ac60226a029 article EN Analytical Chemistry 1965-06-01

The x-ray K and LIII emission bands absorption spectra from TiO, TiN, TiC are superimposed compared with the calculated density-of-states histograms. For TiO agreement is remarkably good. It a little less good for still disagreements probably being due in part to presence of more ionicity bonding than was considered calculations. Results comparisons point up importance transition probabilities contributing can help indicate needed refinements electronic structure.

10.1063/1.1658388 article EN Journal of Applied Physics 1970-09-01

Manipulating the signaling environment is an effective approach to alter cellular states for broad-ranging applications, from engineering tissues treating diseases. Such manipulation requires knowing and histories of cells in situ, which high-throughput discovery methods are lacking. Here, we present integrated experimental-computational framework that learns response signatures a vitro perturbation atlas infers combinatorial activities vivo cell types with high accuracy temporal resolution....

10.1101/2025.03.16.643448 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2025-03-17
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