Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Fred M. Johnson"'
Autor:
Fred M. Johnson
Publikováno v:
Planetary and Space Science. 151:125-129
Integrated surface heat flux data from each planet in our solar system plus over 50 stars, including our Sun, was plotted against each object's known mass to generate a continuous exponential curve at an R-squared value of 0.99. The unexpected yet un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dc6116dcfb3db394f6117c44ad2de99
https://doi.org/10.1016/j.pss.2017.12.003
https://doi.org/10.1016/j.pss.2017.12.003
Autor:
Fred M. Johnson
As a result of the search for the identity of the chromophores responsible for producing the diffuse interstellar bands, a comprehensive exposition of experimental data is presented, which implicates the following molecules- 1. The extremely stable o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7ea7527718cc454160d35d8848f8507
http://arxiv.org/abs/1706.04273
http://arxiv.org/abs/1706.04273
Publikováno v:
Chemical Physics Letters. 231:144-150
The photophysical properties of Mg and Zn tetrabenzoporphyrins and Cd-texaphyrin are presented. These sensitizers have strong absorption bands in the red and near-IR regions that make them good candidates for biological photosensitization. Singlet ox
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f92edb89d0e67fc51728970bbfa334c
https://doi.org/10.1016/0009-2614(94)01262-8
https://doi.org/10.1016/0009-2614(94)01262-8
Publikováno v:
Photochemistry and Photobiology. 57:808-813
Two new sensitizers are introduced for a potential use in photodynamic therapy: Zn(2+)- and MG(2+)-tetrabenzoporphyrin (ZnTBP and MgTBP). A comparative study of the quantum yields of singlet oxygen generation (phi delta) of hematoporphyrin derivative
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4984ff6b115d8bec3bdcc7b6a1762bf0
https://doi.org/10.1111/j.1751-1097.1993.tb09215.x
https://doi.org/10.1111/j.1751-1097.1993.tb09215.x
Autor:
Fred M. Johnson, Benjamin Ehrenberg
Publikováno v:
Spectrochimica Acta Part A: Molecular Spectroscopy. 46:1521-1532
Basic absorption and fluorescence properties of a unique set of chromophores, the tetrabenzoporphyrins (TBPs) (MgTBP, ZnTBP and H 2 TBP) are examined in a variety of solvents, mixtures and special matrices. Methods of fine-tuning the extremely sharp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bdd6a5a42f64e7d4bfacbe13fe51351
https://doi.org/10.1016/0584-8539(90)80066-8
https://doi.org/10.1016/0584-8539(90)80066-8
Autor:
Fred M. Johnson
Publikováno v:
The Diffuse Interstellar Bands ISBN: 9789401041676
It is postulated that two main chromophores, the tetrabenzoporphyrins MgTBP and H2TBP are situated within interstellar paraffin grain matrices, plus a small amount of pyridine. This hypothesis is supported by an impressive array of lab spectroscopic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30b2389bfb3a6dd23c063aaa8f17f655
https://doi.org/10.1007/978-94-011-0373-2_33
https://doi.org/10.1007/978-94-011-0373-2_33
Autor:
Fred M. Johnson, Zvi Malik, Jonathan L. Sessler, Adina Lavi, Benjamin Ehrenberg, Yeshayahu Nitzan, Hava Ladan
Publikováno v:
SPIE Proceedings.
bacterial and human leukemic cells were carried out with these sensitizers, in comparison with HPD andPhotofrin II. The new sensitizers were found to have high quantum yields for production of singlet oxygen insolutions. They also have comparable pho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6153442c1c4d4ab3cb9821f8c34e7f8d
https://doi.org/10.1117/12.60947
https://doi.org/10.1117/12.60947
Publikováno v:
SPIE Proceedings.
We wish to report on PDT simulation studies of a class of compounds, which because of their commercial nonavailability, had hitherto been overlooked: the tetrabenzoporphyrins (TBP5) . We have studied absorption and fluorescence of these compounds in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23685eacd142b3a8826945a9bf08f680
https://doi.org/10.1117/12.17672
https://doi.org/10.1117/12.17672
Autor:
Fred M. Johnson
Publikováno v:
International Astronomical Union Colloquium. 7:229-240
The Problem of Chemical Identification of the interstellar dust grains has vexed astronomers for over three decades. The earliest evidence for the mere presence of interstellar dust was deduced from the observation of stars (via star counts) in the M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28e6c3117bc29e4343985412d44d5ec3
https://doi.org/10.1017/s0252921100118494
https://doi.org/10.1017/s0252921100118494
Autor:
Fred M. Johnson, Jack A. Weichman
Publikováno v:
Oral Surgery, Oral Medicine, Oral Pathology. 31:416-420
A preliminary study has been undertaken in an attempt to seal the orifice to the root canal at the apex of a tooth in vitro by means of a high-power infrared laser. Although the goal was not achieved, sufficient relevant and interesting data were obt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b209f1545900c6374f98c1f4720040d1
https://doi.org/10.1016/0030-4220(71)90164-2
https://doi.org/10.1016/0030-4220(71)90164-2