Foliage from Douglas-fir(var. glauca) seedlings grown under two light intensities was bioassayed to examine palatability to the
western spruce budworm (Choristoneura occidentalis Free.). Samples were collected in Fall, Winter and early Spring to
identify seasonal changes in host foliage, as evidenced by the response of spruce budworms. Fall collected foliage...
In the South Fork of the Clearwater River area, the Salmon River suture (Lund and others, in prep.) is defined by an abrupt change in lithology, structure, initial strontium isotope ratios (Fleck and Criss, 1985), and rare earth element signatures. These changes occur across a narrow, structurally complex zone (less...
Products as diverse as soda-pop, fashion and
automobiles are selling to the tunes of classic and current
pop and rock music. The combination of MTV (Music
Television), the latest audio-visual technology, and the
replacement of movie stars by rock stars as the idols of
contemporary youth (Beckett, 1985; Hartman, 1987),...
The effects of beaver (Castor canadensis) on stream morphology, riparian zones, and coho salmon (Oncorhynchus kisutch) fry in Cape and Cummins Creeks, Oregon, were examined using stream surveys, vegetation transects, and coho salmon fry counts in 1987. The basin around Cape Creek has been extensively logged since the late 1940's....
An understanding of the gibberellins present in Douglas-fir is essential to understanding and controlling the growth and development
of this species. A technique was developed which permits the separation of certain gibberellins with high performance liquid chromatography and their identification with mass spectrometry. An extraction technique
for the isolation of...
The black and white pattern formed when an individual word is
printed on a page was analyzed by the Fourier transform. The Fourier
transform produces a sequence of sinusodial functions, usually called
spatial frequencies, whose amplitudes depend upon the particular
pattern analyzed. These amplitudes were examined to determine if the...
Groundwater is a vital resource and efforts must be made to protect its quality. In certain areas, its quality has been
threatened by the introduction of oil and gasoline, many times originating from underground storage tanks. Massachusetts has
directly reacted to this concern about groundwater quality by promulating a Massachusetts...
Documentation of the side effects of pesticides on
arthropod natural enemies has expanded rapidly since the
1950's as part of an increase in non-target side effects
literature. Most reviews have been based on empirical
analysis of selected literature. The SELCTV database was
developed to make a larger information base accessible...