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Articles 5281 - 5310 of 8069
Full-Text Articles in Entire DC Network
Cal Poly Catalog 1998-1999, Academic Affairs, California Polytechnic State University - San Luis Obispo
Cal Poly Catalog 1998-1999, Academic Affairs, California Polytechnic State University - San Luis Obispo
Course Catalogs
No abstract provided.
An Introduction To Ropes Course And Team Challenge Programs, Marni A. Goldenberg, Gordon M. Nesbitt, David B. Klenosky, Joseph T. O'Leary, Thomas J. Templin
An Introduction To Ropes Course And Team Challenge Programs, Marni A. Goldenberg, Gordon M. Nesbitt, David B. Klenosky, Joseph T. O'Leary, Thomas J. Templin
Recreation, Parks and Tourism Administration
No abstract provided.
Single Magnetic Domains In Magnetotactic Bacteria, Richard B. Frankel, Jin-Ping Zhang, Dennis A. Bazylinski
Single Magnetic Domains In Magnetotactic Bacteria, Richard B. Frankel, Jin-Ping Zhang, Dennis A. Bazylinski
Physics
Magnetotactic bacteria construct an internal, permanent magnetic dipole based on single magnetic domain particles of magnetite or greigite. The organisms exert a high degree of control over the size and morphology of the particles. This may be relevant in distinguishing biogenic from nonbiogenic iron mineral particles.
Three Business Contexts: From The Technical And Moral, To The Aesthetic, John Dobson
Three Business Contexts: From The Technical And Moral, To The Aesthetic, John Dobson
Finance
No abstract provided.
Terminal Restriction Fragment Patterns (Trfps), A Rapid, Pcr-Based Method For The Comparison Of Complex Bacterial Communities, Brian G. Clement, Lucia E. Kehl, Kristin L. Debord, Christopher L. Kitts
Terminal Restriction Fragment Patterns (Trfps), A Rapid, Pcr-Based Method For The Comparison Of Complex Bacterial Communities, Brian G. Clement, Lucia E. Kehl, Kristin L. Debord, Christopher L. Kitts
Biological Sciences
Microbial populations in complex environmental samples are difficult to characterize; current techniques are incomplete and time consuming. We investigated a polymerase chain reaction (PCR)-based method for rapidly comparing bacterial communities independent of culture or cloning. Community 16S rRNA genes were amplified and fluorescently labeled by PCR. The labeled products were digested by a restriction enzyme and the labeled, terminal restriction fragments (TRFs) were separated by electrophoresis and detected by laser-induced fluorescence on an automated gene sequencer. PCR parameters were optimized using an in vitro model community of known organisms. Community comparisons were made between deer fecal pellets, petroleum hydrocarbon-contaminated sands …
A New Niche For Vibrio Logei, The Predominant Light Organ Symbiont Of Squids In The Genus Sepiola, Pat M. Fidopiastis, Sigurd Von Boletzky, Edward G. Ruby
A New Niche For Vibrio Logei, The Predominant Light Organ Symbiont Of Squids In The Genus Sepiola, Pat M. Fidopiastis, Sigurd Von Boletzky, Edward G. Ruby
Biological Sciences
Two genera of sepiolid squids—Euprymna, found primarily in shallow, coastal waters of Hawaii and the Western Pacific, and Sepiola, the deeper-, colder-water-dwelling Mediterranean and Atlantic squids—are known to recruit luminous bacteria into light organ symbioses. The light organ symbiont of Euprymna spp. is Vibrio fischeri, but until now, the light organ symbionts of Sepiola spp. have remained inadequately identified. We used a combination of molecular and physiological characteristics to reveal that the light organs of Sepiola affinis and Sepiola robusta contain a mixed population of Vibrio logei and V. fischeri, with V. logei comprising between …
Impact Of Temperature Acclimation On Photosynthesis In The Toxic Red-Tide Dinoflagellate Alexandrium Fundyense (Ca28), Oscar Schofield, Joseph Grzymski, Mark A. Moline, Raffael J.M. Jovine
Impact Of Temperature Acclimation On Photosynthesis In The Toxic Red-Tide Dinoflagellate Alexandrium Fundyense (Ca28), Oscar Schofield, Joseph Grzymski, Mark A. Moline, Raffael J.M. Jovine
Biological Sciences
This study assessed the impact of temperature on the photosynthetic activity in the dinoflagellate Alexandrium fundyense (Ca28) for cultures grown at 75 µmol photons m–2 s–1 over a range of temperatures. Increasing light intensity under static temperatures caused a 5-fold decrease in the maximum quantum yield for photosystern II (PSII) (FvlFm) Carbon fixation rates mirrored high-light depressions in (FvlFm). Cells in the presence of streptomycin showed an 83% recovery in (FvlFm); therefore, only a minor proportion of the decline in (FvlFm)was attributable …
Photoadaptive Response During The Development Of A Coastal Antarctic Diatom Bloom And Relationship To Water Column Stability, Mark A. Moline
Photoadaptive Response During The Development Of A Coastal Antarctic Diatom Bloom And Relationship To Water Column Stability, Mark A. Moline
Biological Sciences
The ratio of the xanthophyll pigments diadinoxanthin and diatoxanthin to chlorophyll a [(DD + DT): Chl a] was used as a photoadaptive index during the development of a large Antarctic diatom bloom. This index was found to track fluctuations in the incident solar irradiance and the in situ light field over a 3-order-magnitude change in the water column biomass. Depth profiles of the (DD + DT): Chl a ratio showed that the upper mixed layer, assessed by physical data, was in fact stable over the course of the month. Diel experiments conducted over the same period showed a delayed …
Postfire Succession And Disturbance Interactions On An Intermountain Subalpine Spruce-Fir Forest, Michael J. Jenkins, Christopher Dicus, Elizabeth G. Hebertson
Postfire Succession And Disturbance Interactions On An Intermountain Subalpine Spruce-Fir Forest, Michael J. Jenkins, Christopher Dicus, Elizabeth G. Hebertson
Natural Resources Management and Environmental Sciences
Four general postfire successional pathways leading to a climax Engelmann spruce (Picea engelmmlilii Parry)-subalpine fir (Abies /asiocarpa [Hook] Nutt.) forest operate on the T.W. Daniel Experimental Forest in northern Utah. Depending on the successional pathway followed. reestablishment of the prefire climax forest will take 200 to 400 years or more due to a rarity of extreme burning conditions. During the long period between catastrophic stand-replacing fires, a variety of other natural disturbances contribute to the varying structure and composition of vegetation and the fuel mosaic in internountain subalpine spruce-fir forests. Disturbances may range from chronic and small scale …
Vibrational Sum Frequency Spectroscopy Of Surfactants And Phospholipids Monolayers At Liquid-Liquid Interfaces, B. L. Smiley, R. A. Walker, D. E. Gragson, T. E. Hannon, G. L. Richmond
Vibrational Sum Frequency Spectroscopy Of Surfactants And Phospholipids Monolayers At Liquid-Liquid Interfaces, B. L. Smiley, R. A. Walker, D. E. Gragson, T. E. Hannon, G. L. Richmond
Chemistry and Biochemistry
Work from our laboratory on vibrational sum frequency spectroscopic investigations of molecular ordering at the carbon tetrachloride-water interface is reviewed. Simple charged surfactants adsorbed at the liquid-liquid interface are seen to induce alignment of interfacial water molecules to a degree which is dependent on the induced surface potential. Saturation of water molecule alignment occurs at a surfactant surface concentration corresponding to a calculated surface potential of approximately 160 mV. In complementary studies, the relative degree of hydrocarbon chain ordering within monolayers of symmetric phosphatidylcholines of different chain lengths is inferred by the relative signal contributions of the methyl and methylene …
The Biology Of Nonfrugivorous Tephritid Fruit Flies, David H. Headrick, Richard D. Goeden
The Biology Of Nonfrugivorous Tephritid Fruit Flies, David H. Headrick, Richard D. Goeden
Horticulture and Crop Science
This review is the first comprehensive treatment of the biology of nonfrugivorous fruit flies of the family Tephritidae. Feeding habits of destructive and useful species, morphology of immature stages, and hypotheses regarding structural homology and the evolutionary biology of nonfrugivorous tephritids are reviewed, including zoogeography and theories involving resource heterogeneity, guild structure, resource partitioning, resource utilization, facultative niche exploitation, extrinsic and intrinsic factors, host associations, seasonal distribution and phenology, aggregative and circumnatal life history strategies, voltinism, diapause, aestivation, oviposition site, clutch size, and supernumerary oviposition.
Influence Of Ground Cover On Spider Populations In A Table Grape Vineyard, Michael J. Costello, Kent M. Daane
Influence Of Ground Cover On Spider Populations In A Table Grape Vineyard, Michael J. Costello, Kent M. Daane
Horticulture and Crop Science
1. Cover crops and/or resident ground vegetation have been used in California vineyards to increase the number of predators and decrease the number of pestiferous herbivores. The most common resident predators in vineyards are spiders (Araneae). Several observational studies suggest that the addition of cover crops results in an increase in spider density and a decrease in insect pest densities. 2. To test experimentally the effects of cover crops and/or resident ground vegetation (hereafter collectively referred to as ground cover) on spider populations, a 3-year study was undertaken in a commercial vineyard. Large, replicated plots were established with and without …
Biomineralization Of Magnetic Iron Minerals In Bacteria, Richard B. Frankel, Dennis A. Bazylinski, Dirk Schϋler
Biomineralization Of Magnetic Iron Minerals In Bacteria, Richard B. Frankel, Dennis A. Bazylinski, Dirk Schϋler
Physics
Magnetotactic bacteria orient and migrate along magnetic field lines. This ability is based on a submicron assembly of single-magnetic domain iron mineral particles that elegantly solves the problem of how to construct a magnetic dipole that is large enough to be oriented in the geomagnetic field at ambient temperature, yet fit inside a micron-sized cell. The solution is based on the ability of the bacteria to accumulate high concentrations of iron, and control the deposition, size and orientation of a specific iron mineral at specific locations in the cell.
Probing The Intermolecular Hydrogen Bonding Of Water Molecules At The Ccl4/Water Interface In The Presence Of Charges Soluble Surfactant, D. E. Gragson, G. L. Richmond
Probing The Intermolecular Hydrogen Bonding Of Water Molecules At The Ccl4/Water Interface In The Presence Of Charges Soluble Surfactant, D. E. Gragson, G. L. Richmond
Chemistry and Biochemistry
The molecular structure and hydrogen bonding of water molecules at the CCl4/water interface in the presence of a charged soluble surfactant has been explored in this study using vibrational sum frequency generation. By examining OH stretching modes that are highly sensitive to the local hydrogen bonding environment it is found that water molecules at the CCl4/water interface both in the presence and absence of a charged soluble surfactant are predominantly in a tetrahedral arrangement much like the structure ofice. Isotopic dilution studies have been employed to further characterize this icelike interfacial structure. Ablueshift ofapproximately120 cm-1 …
Review Of Sexual Selection: Mate Choice And Courtship In Nature By James L. Gould And Carol Grant Gould, Marlene Zuk, Gita R. Kolluru, Kurt A. Mckean
Review Of Sexual Selection: Mate Choice And Courtship In Nature By James L. Gould And Carol Grant Gould, Marlene Zuk, Gita R. Kolluru, Kurt A. Mckean
Biological Sciences
No abstract provided.
Mustang Daily, November 24, 1997
Mustang Daily, November 24, 1997
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Mustang Daily, November 20, 1997
Mustang Daily, November 20, 1997
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
As-485-97 Resolution On Sports Complex, Richard Kranzdorf And Steven Marx
As-485-97 Resolution On Sports Complex, Richard Kranzdorf And Steven Marx
Academic Senate Resolutions
Addresses environmental concerns involved with the building of a Sports Complex.
Academic Senate - Meeting Minutes, 11/18/1997, Academic Senate
Academic Senate - Meeting Minutes, 11/18/1997, Academic Senate
Academic Senate Minutes
No abstract provided.
Academic Senate - Agenda, 11/18/1997, Academic Senate
Academic Senate - Agenda, 11/18/1997, Academic Senate
Academic Senate Agendas
No abstract provided.
Mustang Daily, November 17, 1997
Mustang Daily, November 17, 1997
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Sources Of Variability In The Column Photosynthetic Cross Section For Antarctic Coastal Waters, Mark A. Moline, Herve Claustre, Barbara B. Prezelin
Sources Of Variability In The Column Photosynthetic Cross Section For Antarctic Coastal Waters, Mark A. Moline, Herve Claustre, Barbara B. Prezelin
Biological Sciences
Using a highly resolved Long Term Ecological Research (LTER) database collected near Palmer Station, Antarctica, from 1991 to 1994, the variability in the column photosynthetic cross section (ψ*, m2 g Chl a -1) was analyzed. The relationship between the daily integrated primary production rates versus the product of surface irradiance (QPAR(0*)) and the integrated chlorophyll content (down to 0.1% QPAR(0*)) gave a ψ* value of 0.0695 m 2 g Chl a-1 (r2 = 0.85, p 2 g Chl a-1) with extreme values extending over a fiftyfold range (0.009-0.488 m 2 …
Mustang Daily, November 13, 1997
Mustang Daily, November 13, 1997
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
November 12, 1997 Cal Poly Report, Public Affairs Office
November 12, 1997 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Mustang Daily, November 10, 1997
Mustang Daily, November 10, 1997
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
A New Control Strategy For A Signalized Traffic Intersection, Allen R. Stubberud, Xiao-Hua Yu
A New Control Strategy For A Signalized Traffic Intersection, Allen R. Stubberud, Xiao-Hua Yu
Electrical Engineering
A traffic control problem can be formulated as a decision-making problem for a stochastic dynamic system. Optimal traffic signal settings at intersections can minimize the vehicle delay time or the queue length at a stop line. In this paper, a new adaptive control strategy for signalized intersections is developed and tested by simulation. The simulation results show significant improvement over the traditional fully actuated control algorithm, especially for the case of high volume traffic demand.
Mustang Daily, November 6, 1997
Mustang Daily, November 6, 1997
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
November 5, 1997 Cal Poly Report, Public Affairs Office
November 5, 1997 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Mustang Daily, November 5, 1997
Mustang Daily, November 5, 1997
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Executive Committee - Agenda, 11/4/1997, Academic Senate
Executive Committee - Agenda, 11/4/1997, Academic Senate
Academic Senate Agendas
No abstract provided.