منابع مشابه
Markarian 421’s Unusual Satellite Galaxy
We present Hubble Space Telescope (HST) imagery and photometry of the active galaxy Markarian 421 and its companion galaxy 14 arcsec to the ENE. The HST images indicate that the companion is a morphological spiral rather than elliptical as previous ground–based imaging has concluded. The companion has a bright, compact nucleus, appearing unresolved in the HST images. This is suggestive of Seyfe...
متن کامل[Twenty-eight day repeated dose oral toxicity test of synergist of a pyrethroid insecticide, 2,3,3,3,2',3',3',3'-Octachlorodipropyl ether (S-421) in rats].
2,3,3,3,2',3',3',3'-Octachlorodipropyl ether (Abbreviation; S-421) is originally developed as synergist of a pyrethroid insecticide. In recent years, S-421 is used widely at home, for a mosquito-repellent incense, electric mosquito-repellent, an insect-killing spray, a vacuum cleaner paper pack, etc. as well. On the other hand, S-421 has been detected in vacuum cleaner dust samples as well as h...
متن کاملNatural products as sources for new pesticides.
Natural products as pesticides have been reviewed from several perspectives in the past, but no prior treatment has examined the impact of natural product and natural product-based pesticides on the U.S. market, as a function of new active ingredient registrations with the Environmental Protection Agency (EPA). Thus, EPA registration details of new active ingredients for all conventional pestic...
متن کاملSynergist for serotonin present in schizophrenic blood.
During an investigation of the serotonin content of normal and schizophrenic blood sera, it was observed that many sera from severely schizophrenic patients contained a substance which augmented the response (contraction) of the isolated rat uterus to serotonin. Doses of serotonin which were too small to cause a contraction of the uterus by themselves did so when dilutions of these sera were ad...
متن کاملInverse Compton gamma - rays from Markarian 421 - A study of GeV and TeV emission from Mrk 421 based on Fermi - LAT and H . E . S . S . data
This thesis summarizes a senior project on the Active Galactic Nucleus (AGN) Markarian 421 (Mrk 421). An AGN is thought to be the site of acceleration where gamma-rays are generated in energy jets at kpc-Mpc scales. From this mechanism, an intense flux of GeV and TeV photons is created by means of non-thermal processes, e.g. synchrotron radiation and inverse Compton. Mrk 421 is one of the most ...
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ژورنال
عنوان ژورنال: Wood Preservation
سال: 1996
ISSN: 0287-9255,1884-0116
DOI: 10.5990/jwpa.22.96