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Creator | Title | Description | Subject | Date |
| 176 |
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Blair, David F. | Electron spin relaxation of CuA and cytochrome a in cytochrome c oxidase: comparison to heme, copper, and sulfur radical complexes | The method of continuous saturation has been used to measure the electron spin relaxation parameter T1T2 at temperatures between 10 and 50 K for a variety of S = % species including: CuA and cytochrome a of cytochrome c oxidase, the type1 copper in several blue copper proteins, the type 2 coppe... | Electron spin relaxation; EPR signals; Sulfur radical complexes | 1984 |
| 177 |
 |
Sperry, John S. | Embolized conduits of rice (Oryza sativa, poaceae) refill despite negative xylem pressure | Embolism reversal in rice plants was studied by testing the plant's ability to refill embolized conduits while xylem pressures were substantially negative. Intact, potted plants were water-stressed to a xylem pressure of -1.88 + 0.1 MPa and a 66.3 + 3.8% loss of xylem conductivity (PLC) by cavitatio... | Embolism; novel revilling; Oryza | 2005 |
| 178 |
 |
Potts, Wayne K. | Emigration behavior of Clark's Nutcracker | Eruptive movements of the Clark's Nutcracker (Nucifraga columbiana) were observed during the late summer and fall of 1977, 1978 and 1979 in northern Utah and adjacent states. Over 2,000 emigrating nutcrackers were seen during these periods. Eruptions began in mid to late August, about the time nutcr... | Breeding range; Flocks; Observations | 1981 |
| 179 |
 |
Capecchi, Mario R. | Establishment of mammalian cell lines containing multiple nonsense mutations and functional suppressor tRNA genes. | We describe the generation of mammalian cell lines carrying amber suppressor genes. Nonsense mutants in the herpes simplex virus thymidine kinase (HSV tk) gene, the Escherichia coli xanthine-guanine phosphoribosyl transferase (Eco-gpt) gene and the aminoglycoside 3' phosphotransferase gene of the Tn... | Cercopithecus aethiops; Escherichia coli; Xenopus | 1982-11-30 |
| 180 |
 |
Bohs, Lynn A. | Ethnobotany of the genus Cyphomandra (Solanaceae) | Plants of the genus Cyphomandra (Solanaceae) have long been utilized for their edible fruits in their native Latin America. The best-known species is the domesticated tree tomato or tamarillo, Cyphomandra betacea. This species, popular as a raw or cooked fruit, is widely cultivated in Andean South ... | Cyphomandra; Cyphomandra betacea; Alkaloids | 1989 |
| 181 |
 |
Ehleringer, James R. | Evaluación de la capacidad estacional de utilizar eventos de preciptación en tres especies de arbustos nativos de Chile con distintos sistemas radiculares | Se evaluó la capacidad estacional de utilizar un evento de precipitación en tres especies arbustivas con diferentes sistemas radiculares (dimórficos: Balbisia peduncularis, Senna cumingii; profundo: Haplopappus parvifolius) en la Quebrada El Romeral, norte-centro de Chile. El sitio posee un clima... | Fuentes de agua; Proporción de isótopos estables; Sistema radicular; Desertificación; Zonas áridas; Chile; Water sources; Stable isotopes ratio; Root system; Arid zone; Balbisia peduncularis; Senna cummingii; Haplopappus parvifolius | 2002 |
| 182 |
 |
Sperry, John S. | Evaluation of Murray's law in Psilotum nudum (Psilotaceae), an analogue of ancestral vascular plants | Previous work has shown that the xylem of seed plants follows Murray's law when conduits do not provide structural support to the plant. Here, compliance with Murray's law was tested in the stem photosynthesizer Psilotum nudum, a seedless vascular plant. Psilotum nudum was chosen because the central... | Conduit furcation number; hydraulic architecture; Murray's law | 2005 |
| 183 |
 |
Seger, Jon | Evidence for a cryptic species complex in the ant parasitoid Apocephalus paraponerae (Diptera: Phoridae) | Cryptic species complexes occur in many taxa, in particular in the insect order Diptera. Here we describe a possible new cryptic species complex in the family Phoridae. Three lines of evidence suggest that Apocephalus paraponerae, an ant parasitoid, is actually a complex of at least four genetically... | Host; Sequence; Populations | 2001 |
| 184 |
 |
Carrier, David R. | Evidence for endothermic ancestors of crocodiles at the stem of archosaur evolution | Physiological, anatomical, and developmental features of the crocodilian heart support the paleontological evidence that the ancestors of living crocodilians were active and endothermic, but the lineage reverted to ectothermy when it invaded the aquatic, ambush predator niche. In endotherms, there i... | Endothermy; ectothermy; Archosaur evolution; Archosaurs; Crocodilian heart | 2004 |
| 185 |
 |
Beckerle, Mary C. | Evidence for the selective association of a subpopulation of GPIIb-IIIa with the actin cytoskeletons of thrombin-activated platelets | Activation of blood platelets triggers a series of responses leading to the formation and retraction of blood clots. Among these responses is the establishment of integrin-mediated transmembrane connections between extracellular matrix components and the actin cytoskeleton of the platelet. | Actin; GPIIb-IIIa | 1993 |
| 186 |
 |
Adler, Frederick R. | Evolution of forager responses to inducible defenses | Most theoretical and empirical investigations of inducible defenses have focused on identifying conditions that favor the evolution of inducibility by the prey species. These analyses outline the essential consequences of frequency-dependent benefits of deploying the defense, degrees of predictabili... | Predation; Cues; Phenotypes | 1999 |
| 187 |
 |
Seger, Jon | Evolution of individuality by Leo W. Buss | Metazoans seldom reproduce vegetatively; they often die of cancer; and they almost always sequester their germ lines. Plants often reproduce vegetatively, seldom die of cancer, and almost never sequester a germ line. Buss argues that these and many other patterns can all be understood in a unified w... | Cell lines; Hierarchy; Biology | 1988 |
| 188 |
 |
Potts, Wayne K. | Evolution of mating preferences and major histocompatibility complex genes | House mice prefer mates genetically dissimilar at the major histocompatibility complex (MHC). The highly polymorphic MHC genes control immunological self/nonself recognition; therefore, this mating preference may function to provide "good genes" for an individual's offspring. However, the evidence ... | Inbreeding; Parasites; Recognition | 1999 |
| 189 |
 |
Sperry, John S. | Evolution of water transport and xylem structure | Land plants need water to replace the evaporation that occurs while atmospheric CO2 is diffusing into photosynthetic tissue. The water-for-carbon exchange rate is poor, and evolutionary history indicates a progression of innovations for cheap water transport--beginning in order with capillary sucti... | Cavitation; Vessels; Plants | 2003 |
| 190 |
 |
Davidson, Diane W. | Evolutionary ecology of symbiotic ant-plant relationships | Abstract.--A tabular survey of ant-plant symbioses worldwide summarizes aspects of the evolutionary ecology of these associations. Remarkable similarities between ant-plant symbioses in disjunct tropical regions result from convergent and parallel evolution of similarly preadapted ants and plants. ... | Symbioses; Evolution; Taxonomic | 1993 |
| 191 |
 |
Gesteland, Raymond F.; Atkins, John F. | Evolutionary specialization of recoding: frameshifting in the expression of S. cerevisiae antizyme mRNA is via an atypical antizyme shift site but is still +1 | An autoregulatory translational shift to the +1 frame is required for the expression of ornithine decarboxylase antizyme from fungi to mammals. In most eukaryotes, including all vertebrates and a majority of the studied fungi/yeast, the site on antizyme mRNA where the shift occurs is UCC-UGA. The me... | Antizyme; ODC; Polyamines; Frameshifting | 2006 |
| 192 |
 |
Davidson, Diane W. | Experimental manipulation of food bodies in Cecropia | Neotropical Cecropia trees range from Mexico to Argentina and are typical of disturbed habitats. Cecropia plants provide food and housing for the ants in return for known or presumed protection from herbivores and vine cover. Glycogen-rich Mullerian bodies (MB's) are the predominant food source for ... | Mullerian bodies; Trichilia; Cecropia tessmannii; Cecropia pungara | 1992 |
| 193 |
 |
Davidson, Diane W. | Experimental studies of species-specificity in cecropia-ant relationships | Strict coevolution requires that interactions among organisms be speciesspecific. We assessed the relative roles of host- and habitat-specificity in determining the match between a genus of myrmecophytic trees and a guild of obligate plant-ants in the moist tropical forests of Madre de Dios, Peru. F... | Ant-plant; Ants; Cecropia; Coevolution; Colonization; Coordinated dispersal; Ecological fitting; Habitat-specificity; Host-specificity; Mutualism; Parasitoid wasps; Preadaptation | 1997 |
| 194 |
 |
Ehleringer, James R.; Cerling, Thure E.; Dearing, Maria-Denise | Experimental study of carbon-isotope fractionation between diet, hair, and feces of mammalian herbivores | The carbon-isotope composition of hair and feces offers a glimpse into the diets of mammalian herbivores. It is particularly useful for determining the relative consumption of browse and graze in tropical environments, as these foods have strongly divergent carbon-isotope compositions. Fecal ?13C v... | Fractionation; Mammalian herbivores; Medicago sativa; Cynodon dactylon | 2003 |
| 195 |
 |
Davidson, Diane W. | Experimental study of diffuse competition in harvester ants | Experiments carried out over a 5-yr period in the Chihuahuan Desert support the a priori prediction of diffuse competition between two species of harvester ants. Despite dietary overlap between a large species {Pogonomyrmex rugosus) and a small species (Pheidole xerophila), the large species facilit... | Chihuahuan Desert; Ants; Facilitation; Resource allocation; Granivory | 1985 |
| 196 |
 |
Goller, Franz | Experimental support for a model of birdsong production | In this work we present an experimental validation of a recently proposed model for the production of birdsongs. We have previously observed that driving the model with simple functions of time, which represent tensions in vocal muscles, produces a wide variety of sounds resembling birdsongs. In th... | Vocal; Muscles; Syrinx | 2003 |
| 197 |
 |
Clayton, Dale H. | Experimental test of the importance of preen oil in Rock Doves (Columba livia) | Most species of birds have a uropygial gland, also known as a preen gland, which produces oil that birds spread through their plumage when preening. The plumage of waterfowl deprived of uropygial oil becomes brittle and is subject to breakage. | Columba livia; Columbiformes; Preen oil; Ectoparasites; Columbicola columbae; Campanulotes compare; Plumage | 2003 |
| 198 |
 |
Capecchi, Mario R. | Expression of a microinjected porcine class I major histocompatibility complex gene in transgenic mice. | A porcine class I major histocompatibility complex (SLA) gene has been introduced into the genome of a C57BL/10 mouse. This transgenic mouse expressed SLA antigen on its cell surfaces and transmitted the gene to offspring, in which the gene is also expressed. Skin grafts of such transgenic mice were... | Genetic Engineering; Graft Rejection; Mice, Inbred C57BL | 1985-05-03 |
| 199 |
 |
Potts, Wayne K. | Fall migration of Golden Eagles in the Wellsville Mountains, Northern Utah, 1976-1979 | Migratory movements of Golden Eagles were investigated in detail as part of a 4-year autumn raptor migration study atop an 8,600-foot ridge in the Wellsville Mountains. In 856 observation hours (161 days) between 6 August and 28 November, 898 Golden Eagles (10% of the oral raptor flight) were counte... | Wellsville Mountains; Golden eagles; Fall migration | 1984 |
| 200 |
 |
Clayton, Dale H. | Feather-busting bacteria | I ONCE HAD A COLLEAGUE who delighted in the aphorism, which he proudly coined himself, "If it's too small to see with the naked eye, it ain't there." Sadly, this view may as well be true for ornithologists who study birds only through unaided eyes, binoculars, or spotting scopes. But birds can also ... | Columba livia; Columbiformes; Ectoparasites; Bacteria; Plumage | 1999 |
