usage of the terms substrate and substratum. A substrate (pI.:
substrates) is a material utilized by microorganisms, generally as a
source of energy. A substratum (pI.: substrata) is asolid surface to
which a microorganism mayattach. REFERENCES (1) Marshall, K.C. 1976.
Interfaces in Microbial Ecology. Cambridge, MA: Harvard University
Press. (2) ZoBell, C.E. 1943. The effect of solid surfaces upon
bacterial activity. J. Bacteriol. 46: 39-56. Standing, left to right:
Paul Rutter, Rolf Freter, Mike Silverman, lan Robb, Hinrich Mrozek,
Frank Dazzo, David Gingell Seated, left to right: Garth Jones,
Stanislawa Tylewska, Staffan Kjelleberg, Ellen Rades-Rohkohl, Kevin
Marshall Microbial Adhesion and Aggregation, ed. K.C. Marshall, pp.
5-19. Dahlem Konferenzen 1984. Berlin, Heidelberg, New York, Tokyo:
Springer-Verlag. Mechanisms of Adhesion Group Report P.R. Rutter,
Rapporteur F.B. Dazzo H. Mrozek R. Freter E. Rades-Rohkohl D. GingeIl
I.D. Robb G.W. Jones M. Silverman 8. Kjelleberg 8. Tylewska K.C.
Marshall INTRODUCTION The subject, Mechanisms of Microbial Attachment,
has proved to be a fertile sour ce of argument between both
microbiologists and physical chemists. In order to find common ground
for discussion, the group endeavored to come to a consensus regarding a
number of definitions pertinent to the subject. Some of these are
described in the text and others will be found at the end of this
report.