Colleagues

	Hannes Alfven had dinner with Manuel in Tucson, AZ in early January of 1978, before it was realized that the operation of the Sun might be related to Alfven's magneto-hydrodynamics. Manuel saw Nobel Laureate Alfven treated rudely at the conference on Protostars and Planets: Studies of Star Formation and the Origin of the Solar System and became aware that control over and access to the flow of federal funds from Washington, DC ranked higher than Alfven 's creative and intuitive intellect in the U.S. astrophysics community. Later Alfven would lament this sad state of affairs, "We should remember that there was once a discipline called natural philosophy," he said in 1986. "Unfortunately, this discipline seems not to exist today".( http://public.lanl.gov/alp/plasma/people/alfven.html) The paper Manuel presented at the conference, “Noble gas anomalies: Elemental and isotopic evidence of a local supernova”, was not included in the Proceedings. Protostars & Planets (Tom Gehrels, editor, University of Arizona Press, Tucson, AZ, 1988) 756 pp.
	Wilbur K. Brown , a physicist at Los Alamos National Laboratory and an authority on fragmentation ballistics, co-authored a review paper with Manuel and others on the Supernova Origin of the solar system. "Origin of the solar system and its elements", J. Radioanal. Nucl. Chem. 238 (1998) 213-225.
	Ramachandran Ganapathy, a former graduate student of Prof. Paul K. Kuroda remained a close personal friend of Manuel from the 1960's, when they co-authored a paper on using extinct iodine-129 from a supernova explosion to date the cooling of meteorites. "Iodine-129/Xenon-129 dating of chondrites", Icarus 9 (1968) 291.
	J. Marvin Herndon, a former student of Professor Marvin W. Rowe, became a friend and ally after Manuel visited him while attending the January 1998 AAS meeting in San Diego to present evidence of "strange xenon" in Jupiter. Marvin and Manuel shared a common heritage: Herndon argued that the Earth's internal source of energy may be a self-sustaining natural nuclear reactor like Kuroda had envisioned in the 1950s; Manuel and co-workers insisted that the Sun's internal source of energy may come from the collapsed core of a supernova that occurred 5 billion years ago, according to Kuroda's Pu-244 age dating. “Examining the overlooked implications of natural nuclear reactors”, E0S: Trans. Am. Geophys. Union (22 September 1998).
	Matt Insall, UMR Associate Professor of Mathematics, helped decipher the nature of the n-n, p-p, and n-p interactions in all 2,850 known assemblages of these fundamental nucleons. "Attraction and Repulsion of nucleons", J. Fusion Energy 19 (2001) 93. http://web.umr.edu/~om/abstracts/jfeinterbetnuc.pdf
	Kevin F. Flynn and L. E. Glendenin, well-known authorities on fission yields at Argonne National Laboratory co-authored a report with Manuel and Srinivasan on the fission yields of Curium-244. "Distribution of mass and charge in the spontaneous fission of Curium-244", Phys. Rev.6C (1972) 2211.
	J. M. Donal MacElroy, UMR Associate Professor of Chemical Engineering, and an authority on transport properties, had the courage to co-author a paper with Manuel presenting an exploratory theoretical basis for empirical evidence of mass fractionation in the Sun. This paper was written before recognition of the role of upward moving protons (H+ ions) from the solar core as the "carrier gas" that maintains mass separation in the Sun. "Can intra-solar diffusion contribute to isotope anomalies in the solar wind?", Proc. 16th Lunar Planet. Sci. Conf., J. Geophys. Res. 91 (1986) D473.
	William A. Myers, Assistant Chair, University of Arkansas, Department of Chemical Engineering, co-authored many papers with the late Professor Paul K. Kuroda using the decay products of extinct Pu-244 to determine the date of the supernova explosion that made our actinide elements. Myers recently joined UMR researchers in using neutron-capture cross-sections to show that 72 different types of atoms in the solar photosphere have been sorted by mass. "Solar abundance of the elements from neutron-capture cross sections", The 36th Lunar Planet. Sci. Conf. (LPSC), #1033, Houston, TX, USA, March 14-18, 2005. http://web.umr.edu/~om/abstracts2005/LunarAbstract.pdf
	Dr.Souriraja Ramadurai, an astrophysicists at the Tata Institute of Fundamental Research in Mumbai, invited Manuel to visit there in 1982-83 to try to decipher the origin of Ne-E, a neon component highly enriched in the heaviest isotope, Ne-22. "Heavy noble gases associated with Neon-E", Meteoritics19 (1984) 264-265. "On the origin of Neon-E", in Isotopic Ratios in the Solar System, J. Garcia, editor, Centre National D'Etudes Spatiales, Toulouse, France (1985) pp. 167-170.
	D. Vincent Roach, UMR Associate Professor of Chemistry, co-authored a paper with Manuel showing that the amounts of extinct iodine-129 and its decay product, xenon-129, in meteorites could be used to determine their cooling rates. "Iodine-129/Xenon-129 dating of chondrites", Icarus 9 (1968) 291.
	Marvin W. Rowe, another student of Professor P. K. Kuroda, remained a close personal friend of Manuel from the 1960's when they co-authored several papers on meteorites. Rowe continued Kuroda's tradition of training young scientists to think for themselves. One of Rowe's former students is J. Marvin Herndon. "Noble gases in the Bruderheim chondrite," Geochim. Cosmochim. Acta28 (1964) 1999.
	Tadashi Shimamura was a close friend of Manuel from the time they met and co-authored a note in 1980 while both were visiting scientist working with Mitsunobu Tatsumoto in his mass spectrometer laboratory at the USGS facility in Denver, CO. "Cm-U and Pu-Xe chronology of meteoritic whitlockite: Confirmation of live Cm-247 in the early solar system", Lunar & Planetary Science Conference XI (1980) 1125-1127.
	V. A. Samaranayake, UMR Associate Professor of Statistics, calculated the probability that the same seven elements - Fe, Ni, O, Si, S, Mg and Ca - that comprise 99% of ordinary meteorites would by mere chance be indicated as the most abundant the interior of the Sun. His statistical analysis of this 1983 finding by Manuel and UMR student, Golden Hwaung, left little doubt of its validity. The answer is less than 2 in ten hundred thousand million billion trillion ! http://web.umr.edu/~om/abstracts/gong-2002.pdf
	David E. Troutner , UMC Professor of Nuclear Chemistry and an authority on fission yield measurements, co-authored a paper with Manuel and his students on fission yields of xenon and krypton isotopes from the spontaneous fission of Californium-252. "Xenon and krypton from the spontaneous fission of Californium-252," Phys. Rev.179 (1969) 1166.