Total length and biomass of fungal mycelium in the soil of a young Douglas-fir stand in the central Oregon Coast Range were estimated over 27 months with the agar-film technique. In a second study, phenology and taxonomy of hypogeous (belowground) sporocarps were studied over 32 months in a nearby, young...
The Purpose of the Study
The purpose of the study was to gain a better understanding of
the classroom environment by determining if student attitudes are
significantly related to the quantity and characteristics of verbal
interaction. A second concern was to determine if such verbal
interaction could be effectively examined...
The purpose of this study was to study in some detail
host factors which influence the population dynamics of
bark beetle. The dissertation objectives were to ascertain
the applicability of utilizing osmotic pressure
values and relative turgidity values of phloem tissue as
indicators which reflect upon the physiological profile
of...
This study was designed to identify and describe home management
tasks, perceived managerial competency, and related social,
psychological, and economic consequences for a sample of retired
couples.
Managerial tasks were defined as essential, periodic activities
which (1) sustain the living patterns of a person or family in a common
household,...
A biographical study of Denison Olmsted, focusing upon his
own Christian world view and its connection with his various
activities in science, supports the view that religion served as a
significant factor in the promotion of science in America during this
time period. Olmsted taught physics, meteorology and astronomy
at...
Workers in colonies of European honey bees Apis mellifera L. clean their
nestmate's body by allogrooming behavior. This behavior may be initiated by
either grooming dancers or by the allogroomers themselves. The first occurs
less frequently (ca. 17 %) than the later (83 %). By using the inner edge of...
This study was undertaken to determine the sorts of polygalacturonases
present in the culture filtrate of Fusarium oxysporum
f. sp. lycopersici, to purify and characterize these enzymes, and to
study any complexes that may form between polygalacturonase and
carbohydrate not degraded by the enzyme.
The polygalacturonase in culture filtrate consists...
Modifications of histone tail amino acid residues are necessary for many reactions involving chromatin. These processes can produce transcriptionally active, euchromatic, or inactive, heterochromatic, segments of DNA. The formation and maintenance of facultative heterochromatin is critical for the proper growth and development of many eukaryotes. Euchromatin can be changed into...