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Articles 361 - 390 of 397
Full-Text Articles in Biology
Natural History Of The Spider Genus Lutica (Araneae, Zodariidae), Martina G. Ramirez
Natural History Of The Spider Genus Lutica (Araneae, Zodariidae), Martina G. Ramirez
Biology Faculty Works
Spiders of the genus Lutica are fossorial inhabitants of coastal dunes of southern California, Baja California and the California Channel Islands. They live in silk-lined burrows concentrated beneath dune vegetation. Lutica are sit-and-wait predators that subdue insects that walk near or over burrows . They are sedentary and do not engage in aerial dispersal via ballooning . Adult males abandon their burrows during the late summer and early fall to wander in search of females . Females produce eggsacs and guard them till they die; spiderlings emerge in the spring. Dune trapdoor spiders (Aptostichus simus) prey on Lutica, …
The Effect Of Fluctuating Substrate Salinity On The Yield And Flag Leaf Photosynthesis Of Wheat, Philippa M. Drennan
The Effect Of Fluctuating Substrate Salinity On The Yield And Flag Leaf Photosynthesis Of Wheat, Philippa M. Drennan
Biology Faculty Works
No abstract provided.
Phylogeny And Historical Biogeography Of The Spider Genus Lutica (Araneae, Zodariidae), Martina G. Ramirez
Phylogeny And Historical Biogeography Of The Spider Genus Lutica (Araneae, Zodariidae), Martina G. Ramirez
Biology Faculty Works
Spiders of the genus Lutica from 19 populations in southern California and Baja California, including all the California Channel Islands except Anacapa, were compared electrophoretically on the basis of variability at 15 gene loci. Fixed allelic differences clearly define two species: new species A [Santa Barbara and Ventura Counties, northern Channel Islands (San Miguel, Santa Rosa, Santa Cruz), southern Channel Islands (San Nicolas, Santa Barbara, Santa Catalina)] and new species C [Guerrero Negro, central Baja California], while morphological features define two others: new species B [Los Angeles, Orange and San Diego Counties, northern Baja California] and clementea [San Clemente Island] …
Per-Like Immunoreactive Neurons Within The Brain Of Xenopus Innervate Both The Retina And Pineal Organ, J. M. Garcia-Fernandez, Kathleen King Siwicki, R. G. Foster
Per-Like Immunoreactive Neurons Within The Brain Of Xenopus Innervate Both The Retina And Pineal Organ, J. M. Garcia-Fernandez, Kathleen King Siwicki, R. G. Foster
Biology Faculty Works
No abstract provided.
Leaf Anatomy, Chloroplast Organization And Photosynthetic Rate Of Hyperhydric Eucalyptus Saligna Sm. Material, Philippa M. Drennan
Leaf Anatomy, Chloroplast Organization And Photosynthetic Rate Of Hyperhydric Eucalyptus Saligna Sm. Material, Philippa M. Drennan
Biology Faculty Works
No abstract provided.
The Drosophila Period Gene And Dye Coupling In Larval Salivary Glands: A Re-Evaluation, Kathleen King Siwicki, K. K. Flint, J. C. Hall, M. Rosbash, D. C. Spray
The Drosophila Period Gene And Dye Coupling In Larval Salivary Glands: A Re-Evaluation, Kathleen King Siwicki, K. K. Flint, J. C. Hall, M. Rosbash, D. C. Spray
Biology Faculty Works
No abstract provided.
Synthesizing Embryology And Human Genetics: Paradigms Regained, Scott F. Gilbert
Synthesizing Embryology And Human Genetics: Paradigms Regained, Scott F. Gilbert
Biology Faculty Works
No abstract provided.
Differential Expression Of Gap Junction Mrnas And Proteins In The Developing Murine Kidney And In Experimentally Induced Nephric Mesenchymes, K. Sainio, Scott F. Gilbert, E. Lehtonen, M. Nishi, N. M. Kumar, N. B. Gilula, L. Saxen
Differential Expression Of Gap Junction Mrnas And Proteins In The Developing Murine Kidney And In Experimentally Induced Nephric Mesenchymes, K. Sainio, Scott F. Gilbert, E. Lehtonen, M. Nishi, N. M. Kumar, N. B. Gilula, L. Saxen
Biology Faculty Works
The expression of three gap junction (GJ) proteins, alpha-1 (Cx43), beta-1 (Cx32), and beta-2 (Cx26), and their transcripts were examined during the ontogeny of the mouse and rat kidney. These proteins were expressed in two non-overlapping patterns. The alpha-1 GJ protein was first observed in mesenchymal cells in the 12-day mouse kidney. By day 14 and thereafter, the ai protein was detected in the transient S-shaped bodies, but not in the podocytes of the maturing glomeruli. After birth the antigen was retained in a small subset of secretory tubules.The beta-1 and beta-2 GJ proteins were similar in their developmental patterns. …
Cytoplasmic Action In Development, Scott F. Gilbert
Cytoplasmic Action In Development, Scott F. Gilbert
Biology Faculty Works
No abstract provided.
Foreword, Scott F. Gilbert
Circadian Fluctuations Of Period Protein Immunoreactivity In The Cns And Visual System Of Drosophila, D. M. Zerr, J. C. Hall, M. Rosbash, Kathleen King Siwicki
Circadian Fluctuations Of Period Protein Immunoreactivity In The Cns And Visual System Of Drosophila, D. M. Zerr, J. C. Hall, M. Rosbash, Kathleen King Siwicki
Biology Faculty Works
When the protein encoded by the period (per) gene, which influences circadian rhythms in Drosophila melanogaster, was labeled with an anti- per antibody in adult flies sectioned at different times of day, regular fluctuations in the intensity of immunoreactivity were observed in cells of the visual system and central brain. These fluctuations persisted in constant darkness. Time courses of the changing levels of staining were altered in the per-short mutant: in light/dark cycles, the phase was earlier than in wild-type, and in constant darkness the period was shorter. In a per-long mutant and in behaviorally subnormal germline transformants (involving transduced …
A Comparison Of Radar Observations Of Bird Migration At Haizhou Bay, China, And Guam, Marianas, Timothy C. Williams , '64, M. Ying
A Comparison Of Radar Observations Of Bird Migration At Haizhou Bay, China, And Guam, Marianas, Timothy C. Williams , '64, M. Ying
Biology Faculty Works
No abstract provided.
The Paradigm Of Huntington Disease, John B. Jenkins, P. M. Conneally
The Paradigm Of Huntington Disease, John B. Jenkins, P. M. Conneally
Biology Faculty Works
No abstract provided.
Radar And Visual Observations Of Autumnal (Southward) Shorebird Migration On Guam, Timothy C. Williams , '64, J. M. Williams
Radar And Visual Observations Of Autumnal (Southward) Shorebird Migration On Guam, Timothy C. Williams , '64, J. M. Williams
Biology Faculty Works
Several species of shorebirds migrate between eastern Asia and the southern Pacific islands, Australia, and New Zealand. Observations made from Guam (13°25′N, 144°45′E) during autumn 1983 indicate that a significant number of birds take a direct route over the western Pacific Ocean. Radar observations and ground counts of migrants on Guam showed two periods of autumnal migratory activity. The first, largely adult birds, was in August and September. The second, largely juveniles, was in late September and October. Radar indicated that large numbers of birds passed over the island to the south with no evidence of compensation for drift by …
Cellular Politics: Ernest Everett Just, Richard B. Goldschmidt, And The Attempt To Reconcile Embryology And Genetics, Scott F. Gilbert
Cellular Politics: Ernest Everett Just, Richard B. Goldschmidt, And The Attempt To Reconcile Embryology And Genetics, Scott F. Gilbert
Biology Faculty Works
No abstract provided.
Phenotypic Assortment In Tetrahymena Thermophila: Assortment Kinetics Of Antibiotic-Resistance Markers, Tsa, Death, And The Highly Amplified Rdna Locus., E. Virginia Merriam, P.J. Bruns
Phenotypic Assortment In Tetrahymena Thermophila: Assortment Kinetics Of Antibiotic-Resistance Markers, Tsa, Death, And The Highly Amplified Rdna Locus., E. Virginia Merriam, P.J. Bruns
Biology Faculty Works
Phenotypic assortment in Tetrahymena thermophila results from random distribution of alleles during amitotic division of the macronucleus. The rate of assortment is dependent on input ratio and the number of assorting units. The assortment of the antibiotic resistance markers Chx, Mpr and gal was determined and is consistent for each with the model of 45 assorting chromosomes. The gene tsA (previously ts-1) shows normal assortment, in contrast to previous reports. A mutation in the highly amplified ribosomal locus (rdnA2) assorts as if present at only 45 copies. Death of clones occurred at a rate consistent with assortment for a single …
Review Of "A History Of Embryology" Edited By T. J. Horder, J. A. Witkowski, And C. C. Wylie, Scott F. Gilbert
Review Of "A History Of Embryology" Edited By T. J. Horder, J. A. Witkowski, And C. C. Wylie, Scott F. Gilbert
Biology Faculty Works
No abstract provided.
Airspeed And Heading Of Autumnal Migrants Over Hawaii, Timothy C. Williams , '64, J. M. Williams, Philip David Kloeckner , '81
Airspeed And Heading Of Autumnal Migrants Over Hawaii, Timothy C. Williams , '64, J. M. Williams, Philip David Kloeckner , '81
Biology Faculty Works
No abstract provided.
Physiological And Anatomical Aspects Of Photosynthesis Of Two Agrostis Species At A Sub‐Antarctic Island, Philippa M. Drennan
Physiological And Anatomical Aspects Of Photosynthesis Of Two Agrostis Species At A Sub‐Antarctic Island, Philippa M. Drennan
Biology Faculty Works
Leaf anatomy, rates of photosynthesis, leaf N, chlorophyll, RuBP carboxylase and nitrate reductase were studied on the indigenous Agrostis magellanica Lam. and the invasive alien Agrostis stolonifera L. on Marion Island (46° 54′ S, 37° 45′ E). Leaves of A. magellanica were more deeply ridged, thicker and more sclerophyllus than those of A. stolonifera. Mesophyll cells of A. magellanica were larger but the number of cells per unit leaf area and the total area of chloroplast per unit leaf area were the same for the two species. Maximum CO2 assimilation rates for the two species did not differ (mean maxima …
Bacchus In The Laboratory: In Defense Of Scientific Puns, Scott F. Gilbert
Bacchus In The Laboratory: In Defense Of Scientific Puns, Scott F. Gilbert
Biology Faculty Works
No abstract provided.
Autumnal Bird Migration Over The Windward Caribbean Islands, Timothy C. Williams , '64
Autumnal Bird Migration Over The Windward Caribbean Islands, Timothy C. Williams , '64
Biology Faculty Works
No abstract provided.
Intellectual Traditions In The Life Sciences: Ii. Stereocomplementarity, Scott F. Gilbert
Intellectual Traditions In The Life Sciences: Ii. Stereocomplementarity, Scott F. Gilbert
Biology Faculty Works
No abstract provided.
Review Of "Embryonic And Fetal Development, Reproduction In Mammals" Edited By C. R. Austin And R. V. Short, Scott F. Gilbert
Review Of "Embryonic And Fetal Development, Reproduction In Mammals" Edited By C. R. Austin And R. V. Short, Scott F. Gilbert
Biology Faculty Works
No abstract provided.
Review Of "The Nature And Origin Of The Biological World" By E. J. Ambrose, John B. Jenkins
Review Of "The Nature And Origin Of The Biological World" By E. J. Ambrose, John B. Jenkins
Biology Faculty Works
No abstract provided.
Nullisomic Tetrahymena. Ii. A Set Of Nullisomics Define The Germinal Chromosomes, E. Virginia Merriam
Nullisomic Tetrahymena. Ii. A Set Of Nullisomics Define The Germinal Chromosomes, E. Virginia Merriam
Biology Faculty Works
Crosses of a diploid Tetrahymena thermophila to a strain with a haploid germinal nucleus result in chromosome loss during meiosis in the haploid. The resulting monosomics can be made nullisomic by a special cross that induces homozygosis of a meiotic product of the germinal nucleus, but retention of the parental somatic nucleus. The creation and testing of single nullisomics for three of the five chromosome pairs and a triple nullisomic missing another pair is presented. Taken together, these strains make possible a series of crosses in which all but one of the chromosomes is missing in one parent. This set …
Intellectual Traditions In The Life Sciences: Molecular Biology And Biochemistry, Scott F. Gilbert
Intellectual Traditions In The Life Sciences: Molecular Biology And Biochemistry, Scott F. Gilbert
Biology Faculty Works
No abstract provided.
Physiology Of Salt Excretion In The Mangrove Avicennia Marina (Forsk.) Vierh, Philippa M. Drennan
Physiology Of Salt Excretion In The Mangrove Avicennia Marina (Forsk.) Vierh, Philippa M. Drennan
Biology Faculty Works
Diurnal and long‐term excretion by leaves of Avicennia marina seedlings growing in aqueous culture was correlated with substrate salinity and transpiration. Excretion was greater in 100% than 50% seawater but the reverse was true for transpiration. The diurnal excretion pattern, with exudation minimal during the day and maximal during the night, showed a negative correlation with the daily transpiration pattern. The total amount of salt excreted, however, showed a positive correlation with the total amount of water transpired. Root and xylem sap salinities were linearly related to substrate salinity but leaf Na+ increased to a maximum, indicating that control of …
Phenotypic Heterogeneity Within Clones Of Fetal Human Cells, Scott F. Gilbert, J. Axelman, B. R. Migeon
Phenotypic Heterogeneity Within Clones Of Fetal Human Cells, Scott F. Gilbert, J. Axelman, B. R. Migeon
Biology Faculty Works
No abstract provided.
Owen's Vertebral Archetype And Evolutionary Genetics: A Platonic Appreciation, Scott F. Gilbert
Owen's Vertebral Archetype And Evolutionary Genetics: A Platonic Appreciation, Scott F. Gilbert
Biology Faculty Works
No abstract provided.
Review Of "Case Studies In Genetics" By M. A. Tribe, I. Tallan, And M. R. Eraut, John B. Jenkins
Review Of "Case Studies In Genetics" By M. A. Tribe, I. Tallan, And M. R. Eraut, John B. Jenkins
Biology Faculty Works
No abstract provided.