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Creator | Title | Description | Subject | Date |
| 226 |
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Shapiro, Michael D. | Genetic architecture of skeletal convergence and sex determination in ninespine sticklebacks | The history of life offers plentiful examples of convergent evolution, the independent derivation of similar phenotypes in distinct lineages [1]. Convergent phenotypes among closely related lineages (frequently termed "parallel" evolution) are often assumed to result from changes in similar genes or... | Convergent evolution; Skeletal convergence; Pungitius pungitius; Gasterosteus aculeatus; Comparative genetics | 2009-07 |
| 227 |
 |
Capecchi, Mario R. | Genetic interaction between hoxb-5 and hoxb-6 is revealed by nonallelic noncomplementation. | hoxb-5 and hoxb-6 are adjacent genes in the mouse HoxB locus and are members of the homeotic transcription factor complex that governs establishment of the mammalian body plan. To determine the roles of these genes during development, we generated mice with a targeted disruption in each gene. Three ... | Alleles; CCAAT-Enhancer-Binding Proteins; Cervical Vertebrae; DNA-Binding Proteins; Forelimb; Genetic Complementation Test | 1995-01-01 |
| 228 |
 |
Jorgensen, Erik | Genetic screens for synaptic function mutants in the nematode C. elegans | The synapse is the site of a remarkable conversion of electrical signals into chemical signals. This conversion takes place when a depolarizing impulse enters the axon terminal and opens voltage-sensitive calcium channels; calcium then flows into the cell and initiates the fusion of synaptic vesicle... | Vesicle; Neurotransmission; Cell | 1996 |
| 229 |
 |
Rogers, Alan R.; Harpending, Henry C. | Genetic structure of ancient human populations | Discusses mitochondrial DNA (mtDNA) sequences as important source of data about the history of human species. | Tree of descent; Mismatch distributions; Simulations; Findings; Intermatch distributions; Younger and older populations | 2001-09-15 |
| 230 |
 |
Parkinson, John Stansfield | Genetics of bacterial chemotaxis | Many types of motile bacteria are capable of detecting and responding to changes in their environment. Phototactic, chemotactic and thermotactic movements in bacteria are similar to more complex behaviours seen in higher organisms, and constitute useful model systems for investigating the molecular ... | Bacterial chemotaxis | 1981 |
| 231 |
 |
Potts, Wayne K. | Gong method for capturing shorebirds and other ground-roosting species | In many shorebird studies it is necessary to capture adult birds. While shorebirds can often be trapped on the nest, capturing them away from the nest is usually very difficult and may require expensive equipment. After weeks of failure in our attempts to capture migrant and resident shorebirds in n... | Gong method; Shorebirds; Capture; Ground-roosting | 1979 |
| 232 |
 |
Davidson, Diane W. | Granivory in a desert ecosystem: experimental evidence for indirect facilitation of ants by rodents | Two major groups of desert granivores, ants and rodents, coexist as permanent residents of local desert habitats in southwestern North America. At our Sonoran Desert study site, both of the major taxa exhibited short-term increase in density when the other taxon was experimentally removed. Over the... | Ants; Arizona; Desert annuals; Facilitation; Granivory; Indirect mutualism; Rodents; Seed predation; Sonoran Desert | 1984 |
| 233 |
 |
Davidson, Diane W. | Granivory in the Chihuahuan Desert: interactions within and between trophic levels | We investigated the effects of Chihuahuan Desert granivores on three seasonal classes of plant resource species, the effects of these resource classes on one another, and the ways in which interactions through plant resources affect the abundances of seed consumers. At our study site, three seasona... | Annual plant; Ant; Competition; Community; Desert; Ecosystem structure; Experiment; Granivore; Indirect interaction; Rodent; Population cycles; Seed predation | 1985 |
| 234 |
 |
Davidson, Diane W. | Granivory in the Chihuahuan desert: interactions within and between trophic levels | We investigated the effects of Chihuahuan Desert granivores on three seasonal classes of plant resource species, the effects of these resource classes on one another, and the ways in which interactions through plant resources affect the abundances of seed consumers. At our study site, three seasona... | Annual plant; Ant; Competition; Community; Desert; Ecosystem structure; Experiment; Granivore; Indirect interaction; Rodent; Population cycles; Seed predation | 1985 |
| 235 |
 |
Bastiani, Michael | Growth cone dynamics during the migration of an identified commissural growth cone | We have used time-lapse video microscopy to study the behavior of a neuron, 01, that pioneers the posterior commissure of the embryonic grasshopper. Our goal is to use time-lapse video as a tool to acquire a precise picture of normal development over time, and thereby identify stereotypic activities... | Time-lapse video; Commissure; Grasshopper; Pathfinding; Filopodia; Confocal microscopy; Adhesion | 1993 |
| 236 |
 |
Coley, Phyllis D. | Growth-defense trade-off and habitat specialization by plants in Amazonian forests | Tropical forests include a diversity of habitats, which has led to specialization in plants. Near Iquitos, in the Peruvian Amazon, nutrient-rich clay forests surround nutrient-poor white-sand forests, each harboring a unique composition of habitat specialist trees. We tested the hypothesis that t... | Amazon; Ecological gradient; Growth-defense trade-off; Habitat specialization; Herbivory; Phenolics; Phylogenetic control; Rainforest; Reciprocal-transplant experiment; Terpenes; Tropical trees | 2006 |
| 237 |
 |
Ehleringer, James R. | Grupos funcionales en arbustos deserticos del norte de Chile, definidos sobre la base de las fuentes de agua utilizadas | La productividad primaria y la estructura de la vegetación en ecosistemas áridos están determinadas por la disponibilidad de agua. En un estudio realizado en el secano costero del norte-centro de Chile (29/43'S; 71/14'O, 300 m) se compararon los mecanismos de utilización de distintas fuentes de... | Grupos funcionales; Functional groups; Arbustos deserticos; Desert shrubs; Fuentes de agua; Water sources; Water availability; Arid ecosystems; Pastoreo con caprinos; Goat overgrazing | 1999-01-01 |
| 238 |
 |
Bastiani, Michael | Guidance of neuronal growth cones in the grasshopper embryo. I. Recognition of a specific axonal pathway by the pCC neuron | The selective affinities that growth cones display for specific axonal surfaces give rise to stereotyped patterns of selective fasciculation. Previous studies on cell recognition by neuronal growth cones in the grasshopper embryo led to the proposal and initial experimental testing of the labeled-p... | Fascicle; Axon; Affinity | 1986 |
| 239 |
 |
Bastiani, Michael | Guidance of neuronal growth cones in the grasshopper embryo. II. Recognition of a specific axonal pathway by the aCC neuron | In the previous paper, we experimentally analyzed the selective affinity of the pCC growth cone for the MP1/dMP2 fascicle in the grasshopper embryo. Here we describe a similar experimental analysis demonstrating the selective affinity of the aCC growth cone for the U fascicle. These results support... | Axon; Cell; Fascicle | 1986 |
| 240 |
 |
Bastiani, Michael | Guidance of neuronal growth cones in the grasshopper embryo. III. Recognition of specific glial pathways | In the previous 2 papers, we focused on the selective affinities that growth cones display for specific axonal pathways. Little is known, however, about how this orthogonal scaffold of axonal pathways in the CNS is established in the first place, and what, if any, role glia might play in these even... | CNS; Nerve; Cells | 1986 |
| 241 |
 |
Bastiani, Michael | Guidance of neuronal growth cones in the grasshopper embryo. IV. Temporal delay experiments | In the previous 3 papers, we demonstrated that neuronal growth cones display selective affinities for both specific axonal and glial pathways in the grasshopper embryo; for example, the pCC growth cone selectively recognizes the MPl/dMP2 axons, while the aCC growth cone selectively recognizes the U... | Pathways; Neurons; Axons | 1986 |
| 242 |
 |
Bastiani, Michael | Guidance of neuronal growth cones: selective fasciculation in the grasshopper embryo | One of the central questions of developmental neurobiology concerns how the diversity and specificity of individual neurons are generated during embryonic development. One major component of neuronal diversity is the complex axonal morphology of individual neurons, largely generated early in develop... | Neurons; Filopodia; Axon | 1983 |
| 243 |
 |
Coley, Phyllis D. | Guía de los arboles comunes del Parque Nacional Soberanía, Panamá | Esta es una guía con dibujos para las cincuenta especies de árboles más comunes del bosque tropical en los alrededores del Parque Soberanía, Panamá. También se incluyen siete especies de hierbas y cuatro herbáceas grandes que sobresalen en el sotobosque (bosque bajo). Aunque en el área del p... | Arboles; Arbustos | 1984 |
| 244 |
 |
Parkinson, John Stansfield | HAMP domain structural determinants for signalling and sensory adaptation in Tsr, the E. coli serine chemoreceptor | Motile Escherichia coli cells track chemical gradients with high sensitivity over wide concentration ranges [recently reviewed in (Hazelbauer et al., 2008; Hazelbauer & Lai, 2010)]. Stimulus detection, amplification, and integration occur in an arrayed network of signaling complexes that contain tra... | | 2014-01-01 |
| 245 |
 |
Sekercioglu, Cagan | Habitat use and movements of native forest birds in southern Costa Rican agricultural countryside | We used radio telemetry to study the habitat use, activity budgets, and movements of three bird species that are found in native forest and coffee plantations of southern Costa Rica. We obtained 7522 locations from Turdus assimilis (n=27), Tangara icterocephala (n=53), and Catharus aurantiirostris (... | | 2003-01-01 |
| 246 |
 |
Capecchi, Mario R. | Hematopoietic origin of pathological grooming in Hoxb8 mutant mice | Mouse Hoxb8 mutants show unexpected behavior manifested by compulsive grooming and hair removal similar to humans with OCD-spectrum disorder trichotillomania. Since Hox gene disruption often has pleiotropic effects, the root cause of this behavioral deficit was unclear. Here we report that, in the b... | | 2010 |
| 247 |
 |
Coley, Phyllis D. | Herbivory and defensive characteristics of tree species in a lowland tropical forest | Rate of herbivory and defensive characteristics of young and mature leaves were measured for saplings of 46 canopy tree species in a lowland tropical rain forest (Barro Colorado Island, Panama). Grazing rates were determined in the field for sample periods in the early wet, late wet, and dry seasons... | Fiber; Herbivory; Life history; Panama; Phenolics; Plant growth; Spatial distribution; Tannins; Temporal distribution; Treefall gaps; Tropical forest | 1983 |
| 248 |
 |
Davidson, Diane W. | Herbivory on planted dipterocarp seedlings in secondary logged forests and primary forests of Sabah, Malaysia | Leaf defences, leaf nutritional quality and leaf expansion rates may vary with resource availabilities to plants. Such variation could affect rates of leaf loss to herbivores, particularly along the steep resource gradients in disturbed forests. Intraspecific and interspecific variation in leaf dama... | Danum Valley; Dipterocarp; Dryobalanops lanceolata; Herbivory rates; Leaf damage; Leaf expansion rates; Logged tropical forests; Secondary forests; Shorea leprosula | 2001-03 |
| 249 |
 |
Olivera, Baldomero M.; Hillyard, David R. | Heterodimeric structure of the spider toxin ω-Agatoxin IA revealed by precursor analysis and mass spectrometry | We report the first molecular characterization of a precursor sequence for a small, Ca2+ channel blocking, peptide spider toxin, ω-agatoxin IA. By integrating information generated from a molecular genetic approach using agatoxin cDNAs with data provided from mass spectrometry of the mature tox... | Spider toxin w-Aga-IA; Heterodimeric structure | 1992 |
| 250 |
 |
Capecchi, Mario R. | High efficiency transformation by direct microinjection of DNA into cultured mammalian cells. | Direct microinjection of DNA by glass micropipettes was used to introduce the Herpes simplex virus thymidine kinase gene into cultured mammalian cells. When DNA was delivered directly into the nuclei of LMTK-, a mouse cell line deficient in thymidine kinase activity, 50--100% of the cells expressed ... | Cell Nucleus; Cytoplasm; DNA, Viral; Microinjections; Recombination, Genetic | 1980-11-22 |
