Fred M. Johnson

ORCID: 0000-0002-1117-5709
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About
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Research Areas
  • Porphyrin and Phthalocyanine Chemistry
  • Astro and Planetary Science
  • Photodynamic Therapy Research Studies
  • Advanced Chemical Physics Studies
  • Laser Design and Applications
  • Astrophysics and Star Formation Studies
  • Molecular Spectroscopy and Structure
  • Photochemistry and Electron Transfer Studies
  • Nanoplatforms for cancer theranostics
  • Solar and Space Plasma Dynamics
  • Laser Applications in Dentistry and Medicine
  • Atmospheric Ozone and Climate
  • Solid State Laser Technologies
  • Laser-Matter Interactions and Applications
  • Spectroscopy and Quantum Chemical Studies
  • Porphyrin Metabolism and Disorders
  • Nonlinear Optical Materials Studies
  • Spectroscopy and Laser Applications
  • Plasma Diagnostics and Applications
  • Photorefractive and Nonlinear Optics
  • Stellar, planetary, and galactic studies
  • Photoreceptor and optogenetics research
  • Laser-induced spectroscopy and plasma
  • Luminescence and Fluorescent Materials
  • Analytical Chemistry and Sensors

Albert Einstein College of Medicine
2023

California State University, Fullerton
1972-2017

Bristol-Myers Squibb (United States)
2007

Moffitt Cancer Center
2007

Sarah Cannon
2007

Epigen Biosciences (United States)
2000

Westinghouse Electric (United States)
1996

Bar-Ilan University
1990-1993

University of California, Irvine
1982

Texas Tech University Health Sciences Center
1980

Measurements of the antiferromagnetic resonance frequency, $\ensuremath{\nu}(T)$, were made on single-crystal slabs Mn${\mathrm{F}}_{2}$ in frequency range 96 to 247.2 kMc/sec and at temperatures, $T$, ranging from 4.2\ifmmode^\circ\else\textdegree\fi{}K 64\ifmmode^\circ\else\textdegree\fi{}K (${T}_{N}=67.7\ifmmode^\circ\else\textdegree\fi{}$K). The results are general agreement with relations derived for materials by Nagamiya, Keffer, Kittel, others. At low values...

10.1103/physrev.114.705 article EN Physical Review 1959-05-01

10.1016/0030-4220(71)90164-2 article EN Oral Surgery Oral Medicine Oral Pathology 1971-03-01

Two new sensitizers are introduced for a potential use in photodynamic therapy: Zn(2+)- and MG(2+)-tetrabenzoporphyrin (ZnTBP MgTBP). A comparative study of the quantum yields singlet oxygen generation (phi delta) hematoporphyrin derivative (HpD), Photofrin II (PF-II), Zn(2+)-phthalocyanine tetrahydroxyl [ZnPC(OH)4] newly ZnTBP MgTBP liposomes, as well kinetics photochemical reaction sensitized by them, was made employing fluorescent membrane probe 9,10-dimethylanthracene (DMA). We followed...

10.1111/j.1751-1097.1993.tb09215.x article EN Photochemistry and Photobiology 1993-05-01

10.1016/0030-4220(72)90301-5 article EN Oral Surgery Oral Medicine Oral Pathology 1972-11-01

2530 Background: OSI-906 is a potent inhibitor of IGF-1R and IR tyrosine kinase activity. Increased activity observed in human malignancies implicated resistance to chemotherapy. Methods: Patients (pt) with advanced solid tumors received escalating doses 3 intermittent dose schedules: (S1) days (d) 1-3 q14 d, (S2 - bridging cohort) d1-5 d (S3) d1-7 determine safety, maximum tolerated (MTD), pharmacokinetics (PK), pharmacodynamics (PD) preliminary antitumor for S1 S3. Results: 61 pt have been...

10.1200/jco.2010.28.15_suppl.2530 article EN Journal of Clinical Oncology 2010-05-20

The ordinary and extraordinary indices of refraction single-crystal selenium, at ambient room temperature, were determined by the direct minimum-deviation technique. Measurements made four different infrared wavelengths are compared with other investigations.

10.1364/josa.59.000072 article EN Journal of the Optical Society of America 1969-01-01

10.1016/0584-8539(90)80066-8 article EN Spectrochimica Acta Part A Molecular Spectroscopy 1990-01-01

Freshly prepared hemoglobin solutions were successively irradiated up to five times with 1 MW (monochromatic wavelength) of green (530 mµ) laser power. Oxygenated showed no detectable change, but the spectral absorption reduced a shift toward characteristic curve for oxygenated form. Intact human erythrocytes exposed power density 110 MW/cm2 radiation appreciable change in diameter or mass, they became transparent wavelength range from 400 600 mµ. A similar ruby failed produce this bleaching...

10.1083/jcb.27.1.191 article EN The Journal of Cell Biology 1965-10-01

Glucose homeostasis can be improved after bariatric surgery that alters bile flow and stimulate gut hormone secretion, in particular FGF15/19. FGFR1 expression AGRP expressing cells is required for acids's ability to improve glucose control. We show the mouse Agrp gene has 3 promoter/enhancer regions direct transcription of each their own transcripts. One these promoters/enhancers, B, regulated by acids. generated an B knock-in FLP/knockout allele. are found endocrine pars tuberalis (PT)...

10.1172/jci164185 article EN cc-by Journal of Clinical Investigation 2023-02-14

A technique is described for producing a continuously tunable uv source using the broadband emission from dye laser as input to rotatable KDP crystal. theoretical model developed based on mixing of band components which are spaced equidistant and symmetrically about part line that corresponds maximum SHG (Deltak = 0). This agrees well with observed spectral narrowing, relatively high experimental conversion efficiency, tuning curve.

10.1364/ao.10.001624 article EN Applied Optics 1971-07-01

Stimulated Raman emission (SRE) spectra were observed from high-pressure CH4 and H2 in two different experiments. In the first experiment gases mixed together one scattering cell, a laser pulse excited mixture; second they isolated each other separate cells placed series so that both gases. The experiments are essentially identical: well-known SRE lines gas at ν̃0+nν̃1(i), where ν̃0 is wavenumber associated with excitation, ν̃1(i) frequency of totally symmetric vibration molecule i, n≐±1,...

10.1063/1.1841261 article EN The Journal of Chemical Physics 1967-05-01

10.1111/j.1749-6632.1972.tb48328.x article Annals of the New York Academy of Sciences 1972-01-01

Highly complex stimulated Raman scattering (SRS) spectra of hydrogen were produced by using narrow linewidth 1.058-μ giant-pulsed laser excitation. Results are presented which include the first reported observation combination lines whose frequencies given mvQ(1) + pvS(1) − vL where vQ(1), vS(1) and vibrational (4155 cm−1), rotational (587 cm−1) frequency, respectively, m = 6, 7, or 9 p 0 ±1. Numerous described formula v nvS(0) pvS(1), (m, n, 0, ±1, ±2,…), 354 cm−1, also observed.

10.1063/1.1754891 article EN Applied Physics Letters 1967-03-01

Stimulated Raman scattering (SRS) from high-pressure H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> gas was observed when giant-pulse ruby-laser radiation of frequency <tex xmlns:xlink="http://www.w3.org/1999/xlink">\tilde{\nu}_{0} = 14 398</tex> cm <sup xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> , and its second harmonic xmlns:xlink="http://www.w3.org/1999/xlink">2\tilde{\nu}_{0}</tex> were simultaneously focussed on the...

10.1109/jqe.1968.1075351 article EN IEEE Journal of Quantum Electronics 1968-06-01

The Stanford Synchrotron Radiation Project (SSRP) is now in full operation as a national facility utilizing the intense ultraviolet and x-radiation from storage ring SPEAR at Linear Accelerator Center (SLAC). experimenter-operated designed to maximize access to, utilization of radiation by 5 or more simultaneous users, within limits parasitic on high energy colliding beam ring. A novel experimenter-controlled personnel protection system permits independent each experimental areas. vacuum...

10.1109/tns.1975.4327994 article EN IEEE Transactions on Nuclear Science 1975-01-01
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