An examination of the technical and historical literature
concerning the discovery and development of antibiotics suggests the
possible existence of an era of discovery. This era appears to have
a well-defined beginning (about 1940) and a well-defined close (about
1960). It is the purpose of this dissertation to examine the...
2 -acetylaminofluorene -induced hepatocarcinogenesis in rats
proceeds in stages of initiation and promotion, similar to experimental
systems, in mouse skin. In this study promoters of liver
tumorigenesis, phenobarbital, DDT and butylated hydroxytoluene
(BHT), were compared to non-promoters, amobarbital, diphenylhydantoin
(DPH) and benz(a)anthracene (BA), for their ability to
cause liver growth...
Bdellovibrio bacteriovorus 100 and B. stolpii UKi-2 each produce
two extracellular proteases which attack Azocoll (collagen)
while B. starrii A3.12 produces at least four such proteolytic
enzymes. Under standard growth and assay conditions each Bdellovibrio
species produces a unique amount of proteolytic activity. The
decreasing order of enzyme units was...
The objective of this study is to
answer four questions concerning the transportation
network on the Willamette National Forest. These
questions are 1) how many and what kind of roads
exist on the forest, 2) how much annual traffic
can these existing roads handle, 3) can the
existing system handle...
This paper describes an investigation of a matrix algebraic method to determine isomorphism in pairs of undirected graphs. The method is described in some detail. The theoretical as well as the practical difficulties are given. It is shown that the method works for some cases. When the adjacency matrix of...
The FLEX/REFLEX paradigm is applied to the description of a computer program system. The paradigm is shown to be relevant and appropriate to computer program systems and to advantageously display and structure the general hierarchical characteristics of computer program systems. Program systems characterized in the paradigm are described both holistically...
Chromosome maps were made of Drosophila gibberosa salivary gland
and fat body chromosomes, and the puffing patterns were compared in
the two tissues for selected times in development. The times were
early third instar (E), late third instar (0, at pupariation
(0 hr), at two hours (2 hr), four hours...
In this work we propose a computer based approach by means of
which the decision maker in Bendel State, Nigeria, can best be assisted
in the formulation of policies related to land use.
In Chapter I we briefly discuss the role of the computer in
planning and state the problem....
The genus Tiaja Oman consists of eight known species of flightless
leafhoppers of the subfamily Megophthalminae found along the
western coast of North America between British Columbia and
northern Mexico. Species occurring from the San Francisco Bay
area northward are restricted to a narrow coastal zone within 1 km of...