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Articles 4981 - 5010 of 8069
Full-Text Articles in Entire DC Network
Occurrence And Distribution Of Diverse Populations Of Magnetic Protists In A Chemically Stratified Coastal Salt Pond, Dennis A. Bazylinski, David R. Schlezinger, Brian H. Howes, Richard B. Frankel, Slava S. Epstein
Occurrence And Distribution Of Diverse Populations Of Magnetic Protists In A Chemically Stratified Coastal Salt Pond, Dennis A. Bazylinski, David R. Schlezinger, Brian H. Howes, Richard B. Frankel, Slava S. Epstein
Physics
Chemical stratification occurs in the water columns and sediments of many aquatic habitats resulting in vertical chemical and redox gradients. Various types of microorganisms are often associated with specific depths and chemical parameters in these situations. For example, magnetite-producing magnetotactic bacteria are known to form horizontal “plates” of cells at the oxic/anoxic transition zone (OATZ) of such environments. Here, we report the presence of populations of diverse magnetic protists in a seasonally chemically stratified, coastal salt pond. The protistan types included several biflagellates, a dinoflagellate, and a ciliate that were each associated with specific depths and thus, specific chemical, microbiological …
July 19, 2000 Cal Poly Report, Public Affairs Office
July 19, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Summer Mustang, July 6, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Molecular Aspect Of Leaf Senescence, Edward Himelblau, Betania Quirino, Yoo-Sun Noh, Richard Amasino
Molecular Aspect Of Leaf Senescence, Edward Himelblau, Betania Quirino, Yoo-Sun Noh, Richard Amasino
Biological Sciences
Senescence is the last stage of leaf development and one type of programmed cell death that occurs in plants. The relationships among senescence programs that are induced by a variety of factors have been addressed at a molecular level in recent studies. Furthermore, an overlap between the pathogen-response and senescence programs is beginning to be characterized. The complexity of the senescence program is also evident in studies of senescence-specific gene regulation and the role of photosynthesis and plant hormones in senescence regulation. New molecular-genetic approaches are expected to be useful in unraveling the molecular mechanisms of the leaf senescence program.
Sequence Analysis Of Bacterial Dna In The Colon And Stomach Of The Tyrolean Iceman, Raul J. Cano, Friedrich Tiefenbrunner, Massimo Ubaldi, Clarissa Del Cueto, Stefania Luciani, Tobe Cox, Paula Orkand, Karl H. Kunzel, Franco Rollo
Sequence Analysis Of Bacterial Dna In The Colon And Stomach Of The Tyrolean Iceman, Raul J. Cano, Friedrich Tiefenbrunner, Massimo Ubaldi, Clarissa Del Cueto, Stefania Luciani, Tobe Cox, Paula Orkand, Karl H. Kunzel, Franco Rollo
Biological Sciences
The male human body found in an Alpine glacier on September 19, 1991 ("Tyrolean Iceman") has, for the first time in history, given scientists a chance to perform detailed anatomical, histological, and molecular investigations on the organs of a person from the Neolithic Age (5350-5100 B.P.). In the present study, tissue samples aseptically taken from the stomach and the colon of the mummy were utilized for DNA extraction, and the DNA was PCR-amplified, using primer pairs designed to bind to fragments of the 16s ribosomal RNA gene (16s rDNA) of a broad range of bacteria. The PCR products were cloned …
June 21, 2000 Cal Poly Report, Public Affairs Office
June 21, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
June 7, 2000 Cal Poly Report, Public Affairs Office
June 7, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
June 7, 2000 Cal Poly Report, Public Affairs Office
June 7, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Energetics Of Larval Swimming And Metamorphosis In Four Species Of Bugula (Bryozoa), Dean E. Wendt
Energetics Of Larval Swimming And Metamorphosis In Four Species Of Bugula (Bryozoa), Dean E. Wendt
Biological Sciences
The amount of energy available to larvae during swimming, location of a suitable recruitment site, and metamorphosis influences the length of time they can spend in the plankton. Energetic parameters such as swimming speed, oxygen consumption during swimming and metamorphosis, and elemental carbon and nitrogen content were measured for larvae of four species of bryozoans, Bugula neritina, B. simplex, B. stolonifera, and B. turrita. The larvae of these species are aplanktotrophic with a short free-swimming phase ranging from less than one hour to a maximum of about 36 hours. There is about a fivefold difference in larval volume …
Trans-Holocene Marine Mammal Exploitation On San Clemente Island, California: A Tragedy Of The Commons Revisited, Judith F. Porcasi, Terry L. Jones, L. Mark Raab
Trans-Holocene Marine Mammal Exploitation On San Clemente Island, California: A Tragedy Of The Commons Revisited, Judith F. Porcasi, Terry L. Jones, L. Mark Raab
Social Sciences
Occupied from ca. 7040 B.C. to AD. 1400, the Eel Point Site (CA-SCLI-43) on San Clemente Island, California represents one of the longest sequences of near-continuous marine resource exploitation on the west coast of North America. Faunal remains suggest transitions from heavy exploitation of fur seals and sea lions during the early Holocene, to increased hunting of cetaceans at mid-Holocene, to a focus on sea otters and fish during the late Holocene. These trends are consistent with patterns of overexploitation and economic intensification on the California and Oregon mainland, but they also suggest watercraft-based hunting earlier on the island than …
Delivering Copper Within Plant Cells, Edward Himelblau, Richard M. Amasino
Delivering Copper Within Plant Cells, Edward Himelblau, Richard M. Amasino
Biological Sciences
Two genes recently identified in Arabidopsis thaliana may be involved in sequestering free copper ions in the cytoplasm and delivering copper to post-Golgi vesicles. The genes COPPER CHAPERONE and RESPONSIVE TO ANTAGONIST1 are homologous to copper-trafficking genes from yeast and humans. This plant copper-delivery pathway is required to create functional ethylene receptors. The pathway may also facilitate the transport of copper from senescing leaf tissue. In addition, several other genes have been identified recently that may have a role in copper salvage during senescence.
Serum Ferritin Concentration And Recurrence Of Colorectal Adenoma, Marilyn Tseng, E. Robert Greenberg, Robert S. Sandler, John A. Baron, Robert W. Haile, Baruch S. Blumberg, Katherine A. Mcglynn
Serum Ferritin Concentration And Recurrence Of Colorectal Adenoma, Marilyn Tseng, E. Robert Greenberg, Robert S. Sandler, John A. Baron, Robert W. Haile, Baruch S. Blumberg, Katherine A. Mcglynn
Kinesiology and Public Health
Abstract Both body iron stores and dietary iron intake have been reported to increase risk of colorectal neoplasms. We assessed whether serum ferritin concentration was associated with recurrence of colorectal adenomas among 733 individuals with baseline determinations of ferritin as part of a multicenter clinical trial of antioxidant supplements for adenoma prevention. All study participants had at least one adenoma removed within 3 months before enrollment, and 269 of them developed one or more adenomas between follow-up colonoscopies conducted 1 and 4 years after enrollment. Baseline serum ferritin concentrations were analyzed both as a log-transformed continuous variable and as a …
May 31, 2000 Cal Poly Report, Public Affairs Office
May 31, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Mustang Daily, May 26, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Mustang Daily, May 25, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
May 24, 2000 Cal Poly Report, Public Affairs Office
May 24, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Mustang Daily, May 22, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Protozoan Free Colonies Of Lepidoptera, Kingston L. H. Leong
Protozoan Free Colonies Of Lepidoptera, Kingston L. H. Leong
Biological Sciences
A method for the establishment and maintenance of colonies of Lepidoptera which are free of contamination with protozoa is provided. The colonies consists of individuals capable of breeding and producing viable, noncontaminated butterflies.
Mustang Daily, May 8, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
May 3, 2000 Cal Poly Report, Public Affairs Office
May 3, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Mustang Daily, May 3, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Mustang Daily, May 2, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Master Plan Power Point Presentation, Facilities Planning And Capital Projects, California Polytechnic State University - San Luis Obispo
Master Plan Power Point Presentation, Facilities Planning And Capital Projects, California Polytechnic State University - San Luis Obispo
Publications
No abstract provided.
Mustang Daily, May 1, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
April 19, 2000 Cal Poly Report, Public Affairs Office
April 19, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Executive Committee - Agenda, 4/18/2000, Academic Senate
Executive Committee - Agenda, 4/18/2000, Academic Senate
Academic Senate Agendas
No abstract provided.
Mustang Daily, April 17, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
April 12, 2000 Cal Poly Report, Public Affairs Office
April 12, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Mustang Daily, April 11, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Academic Senate - Agenda, 4/11/2000, Academic Senate
Academic Senate - Agenda, 4/11/2000, Academic Senate
Academic Senate Agendas
No abstract provided.