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1998

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Articles 1 - 30 of 2110

Full-Text Articles in Life Sciences

Absorption Efficiencies And Biochemical Fractionation Of Assimilated Compounds In The Cold Water Appendicularian Oikopleura Vanhoeffeni, Alexander B. Bochdansky, Don Deibel, Richard B. Rivkin Dec 1998

Absorption Efficiencies And Biochemical Fractionation Of Assimilated Compounds In The Cold Water Appendicularian Oikopleura Vanhoeffeni, Alexander B. Bochdansky, Don Deibel, Richard B. Rivkin

OES Faculty Publications

Using Ge-68:C-14 dual-labeling, we investigated the absorption efficiency of diatom carbon for the cold water appendicularian Oikopleura vanhoeffeni. The absorption efficiency of bulk carbon (mean = 67%) was not influenced by body size or ingestion rate. For the first time for a pelagic tunicate, food and feces were fractionated into their major biochemical constituents (i.e., low-molecular-weight compounds, lipid, protein, and polysaccharide), allowing calculation of absorption efficiencies for each fraction. Low-molecular-weight compounds and proteins were preferentially absorbed over lipids and polysaccharides. However, predicted C:N ratios of the fecal pellets of O. vanhoeffeni were in the lower range of C ...


Functional Analysis Of Tpr: Identification Of Nuclear Pore Complex Association And Nuclear Localization Domains And A Role In Mrna Export, Peter Lawrence Bangs, Brian Burke, Christine M. Powers, Roger W. Craig, Aruna Purohit, Stephen J. Doxsey Dec 1998

Functional Analysis Of Tpr: Identification Of Nuclear Pore Complex Association And Nuclear Localization Domains And A Role In Mrna Export, Peter Lawrence Bangs, Brian Burke, Christine M. Powers, Roger W. Craig, Aruna Purohit, Stephen J. Doxsey

Open Access Publications by UMass Chan Authors

Tpr is a 270-kD coiled-coil protein localized to intranuclear filaments of the nuclear pore complex (NPC). The mechanism by which Tpr contributes to the structure and function of the nuclear pore is currently unknown. To gain insight into Tpr function, we expressed the full-length protein and several subdomains in mammalian cell lines and examined their effects on nuclear pore function. Through this analysis, we identified an NH2-terminal domain that was sufficient for association with the nucleoplasmic aspect of the NPC. In addition, we unexpectedly found that the acidic COOH terminus was efficiently transported into the nuclear interior, an event that ...


Drosophila Fascin Mutants Are Rescued By Overexpression Of The Villin-Like Protein, Quail, Kelly Cant, Brenda A. Knowles, Shalina Mahajan-Miklos, Matthew Heintzelman, Lynn Cooley Dec 1998

Drosophila Fascin Mutants Are Rescued By Overexpression Of The Villin-Like Protein, Quail, Kelly Cant, Brenda A. Knowles, Shalina Mahajan-Miklos, Matthew Heintzelman, Lynn Cooley

Dartmouth Scholarship

Actin bundle assembly in specialized structures such as microvilli on intestinal epithelia and Drosophila bristles requires two actin bundling proteins. In these systems, the distinct biochemical properties and temporal localization of actin bundling proteins suggest that these proteins are not redundant. During Drosophila oogenesis, the formation of cytoplasmic actin bundles in nurse cells requires two actin bundling proteins, fascin encoded by the singed gene and a villin-like protein encoded by the quail gene. singed and quail mutations are fully recessive and each mutation disrupts nurse cell cytoplasmic actin bundle formation. We used P-element mediated germline transformation to overexpress quail in ...


Northeast Research Station Watertown, South Dakota Annual Progress Report, 1998, Agricultural Experiment Station, Plant Science Department Dec 1998

Northeast Research Station Watertown, South Dakota Annual Progress Report, 1998, Agricultural Experiment Station, Plant Science Department

Agricultural Experiment Station and Research Farm Annual Reports

This is the 1998 annual progress report for the Northeast Research Station in Watertown, South Dakota. This report is issued by the South Dakota Agricultural Experiment Station and the South Dakota State University Plant Science Department. This report includes information on the 1998 crop season, including: precipitation summary, small grain , corn, and soybean performance trials, flax and canola variety trials, spring and winter wheat breeding , soybean row space/population studies, performance of corn hybrids, corn yields, rotation studies and fungicide test.


Release Of Camp Gating By The Alpha6beta4 Integrin Stimulates Lamellae Formation And The Chemotactic Migration Of Invasive Carcinoma Cells, Kathleen L. O'Connor, Leslie M. Shaw, Arthur M. Mercurio Dec 1998

Release Of Camp Gating By The Alpha6beta4 Integrin Stimulates Lamellae Formation And The Chemotactic Migration Of Invasive Carcinoma Cells, Kathleen L. O'Connor, Leslie M. Shaw, Arthur M. Mercurio

Cancer Biology Publications

The alpha6beta4 integrin promotes carcinoma in-vasion by its activation of a phosphoinositide 3-OH (PI3-K) signaling pathway (Shaw, L.M., I. Rabinovitz, H.H.-F. Wang, A. Toker, and A.M. Mercurio. Cell. 91: 949-960). We demonstrate here using MDA-MB-435 breast carcinoma cells that alpha6beta4 stimulates chemotactic migration, a key component of invasion, but that it has no influence on haptotaxis. Stimulation of chemotaxis by alpha6beta4 expression was observed in response to either lysophosphatidic acid (LPA) or fibroblast conditioned medium. Moreover, the LPA-dependent formation of lamellae in these cells is dependent upon alpha6beta4 expression. Both lamellae formation and chemotactic migration are ...


Interaction Of Zpr1 With Translation Elongation Factor-1alpha In Proliferating Cells, Laxman Gangwani, Monique Mikrut, Zoya Galcheva-Gargova, Roger J. Davis Dec 1998

Interaction Of Zpr1 With Translation Elongation Factor-1alpha In Proliferating Cells, Laxman Gangwani, Monique Mikrut, Zoya Galcheva-Gargova, Roger J. Davis

Open Access Publications by UMass Chan Authors

The zinc finger protein ZPR1 is present in the cytoplasm of quiescent mammalian cells and translocates to the nucleus upon treatment with mitogens, including epidermal growth factor (EGF). Homologues of ZPR1 were identified in yeast and mammals. These ZPR1 proteins bind to eukaryotic translation elongation factor-1alpha (eEF-1alpha). Studies of mammalian cells demonstrated that EGF treatment induces the interaction of ZPR1 with eEF-1alpha and the redistribution of both proteins to the nucleus. In the yeast Saccharomyces cerevisiae, genetic analysis demonstrated that ZPR1 is an essential gene. Deletion analysis demonstrated that the NH2-terminal region of ZPR1 is required for normal growth and ...


Analysis Of Murine Cd8(+) T-Cell Clones Specific For The Dengue Virus Ns3 Protein: Flavivirus Cross-Reactivity And Influence Of Infecting Serotype, Anne C. Spaulding, Ichiro Kurane, Francis A. Ennis, Alan L. Rothman Dec 1998

Analysis Of Murine Cd8(+) T-Cell Clones Specific For The Dengue Virus Ns3 Protein: Flavivirus Cross-Reactivity And Influence Of Infecting Serotype, Anne C. Spaulding, Ichiro Kurane, Francis A. Ennis, Alan L. Rothman

Open Access Publications by UMass Chan Authors

Serotype-cross-reactive dengue virus-specific cytotoxic T lymphocytes (CTL) induced during a primary dengue virus infection are thought to play a role in the immunopathogenesis of dengue hemorrhagic fever (DHF) during a secondary dengue virus infection. Although there is no animal model of DHF, we previously reported that murine dengue virus-specific CTL responses are qualitatively similar to human dengue virus-specific CTL responses. We used BALB/c mice to study the specificity of the CTL response to an immunodominant epitope on the dengue virus NS3 protein. We mapped the minimal H-2Kd-restricted CTL epitope to residues 298 to 306 of the dengue type 2 ...


Dynamics Of Human Immunodeficiency Virus Type 1 Replication In Vertically Infected Infants, Katherine Luzuriaga, Hulin Wu, Margaret M. Mcmanus, Paula Britto, William Borkowsky, Sandra K. Burchett, Betsy Smith, Lynne M. Mofenson, John L. Sullivan Dec 1998

Dynamics Of Human Immunodeficiency Virus Type 1 Replication In Vertically Infected Infants, Katherine Luzuriaga, Hulin Wu, Margaret M. Mcmanus, Paula Britto, William Borkowsky, Sandra K. Burchett, Betsy Smith, Lynne M. Mofenson, John L. Sullivan

Open Access Publications by UMass Chan Authors

Plasma human immunodeficiency virus type 1 (HIV-1) turnover and kinetics were studied in children aged 15 days to 2 years following the initiation of a triple antiretroviral drug regimen consisting of zidovudine, lamivudine, and nevirapine. HIV-1 turnover was at least as rapid as that previously described in adults; turnover rates were more rapid in infants and children aged 3 months to 2 years than in infants less than 3 months of age. These data confirm the central role of HIV-1 replication in the pathogenesis of vertical HIV-1 infection and reinforce the importance of early, potent combination therapies for the long-term ...


Endangered And Threatened Wildlife And Plants; Final Rule To List The Topeka Shiner As Endangered Dec 1998

Endangered And Threatened Wildlife And Plants; Final Rule To List The Topeka Shiner As Endangered

Endangered Species Bulletins and Technical Reports (USFWS)

The U.S. Fish and Wildlife Service determines the Topeka shiner (Notropis Topeka) to be an endangered species under the authority of the Endangered Species Act of 1973 (Act), as amended (16 U.S.C. 1531 et seq.). The Topeka shiner is a small fish presently known from small tributary streams in the Kansas and Cottonwood river basins in Kansas; the Missouri, Grand, Lamine, Chariton, and Des Moines river basins in Missouri; the North Raccoon and Rock river basins in Iowa; the James, Big Sioux and Vermillion river watersheds in South Dakota; and, the Rock and Big Sioux river watersheds ...


Central Crops And Soils Research Station Highmore, South Dakota: Annual Progress Report, 1998, Agricultural Experiment Station Dec 1998

Central Crops And Soils Research Station Highmore, South Dakota: Annual Progress Report, 1998, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This report of the Central Crops and Soils Research Station at Highmore, South Dakota is a progress report and, therefore, the results presented are not necessarily complete nor conclusive. Any interpretation given is tentative because additional data from continuation of these experiments may produce conclusions different from those of any one year. The data presented in this report reflect the 1998 growing season.


Promotor (Flt) For The Full-Length Transcript Of Peanut Chlorotic Streak Caulimovirus (Pclsv) And Expression Of Chimeric Genes In Plants, Indu B. Maiti, Robert J. Shepherd Dec 1998

Promotor (Flt) For The Full-Length Transcript Of Peanut Chlorotic Streak Caulimovirus (Pclsv) And Expression Of Chimeric Genes In Plants, Indu B. Maiti, Robert J. Shepherd

Kentucky Tobacco Research and Development Center Faculty Patents

The isolation, modification and use of wild-type and modified viral FLt promoters of peanut chlorotic streak caulimovirus (PClSV) in the expression of chimeric genes in plant cells. The FLt promoter from PClSV has been modified to have duplicated enhancer domains.


Rhodospirillum Rubrum Poly-Β-Hydroxyalkanoate Synthase, Thomas E. Clemente, Ganish M. Kishore, Timothy A. Mitsky, David M. Stark Dec 1998

Rhodospirillum Rubrum Poly-Β-Hydroxyalkanoate Synthase, Thomas E. Clemente, Ganish M. Kishore, Timothy A. Mitsky, David M. Stark

Faculty Publications from the Center for Plant Science Innovation

Isolated DNA fragments encoding a Rhodospirillum rubrum (ATCC 25903) polyhydroxyalkanoate (PHA) synthase, or biologically functional equivalents thereof, are provided. Also provided is the deduced amino acid sequence of the R. rubrum PHA synthase. These molecules are useful in the production of PHAs in bacteria and plants.


Recent Northern Records Of The Nine-Banded Armadillo (Dasypodidae) In Nebraska, Patricia W. Freeman, Hugh H. Genoways Dec 1998

Recent Northern Records Of The Nine-Banded Armadillo (Dasypodidae) In Nebraska, Patricia W. Freeman, Hugh H. Genoways

Mammalogy Papers: University of Nebraska State Museum

Examination of the distribution of nine-banded armadillo in Nebraska reveals that these animals may be entering the state from two directions. The animals in Chase, Dundy, and Furnas counties appear to be closely associated with the Republican River and its tributaries and probably reached the state along these riparian habitats from northwestern Kansas and northeastern Colorado. Records in the central and eastern part of Nebraska are not closely tied to one river system. For the specimen from Ord to have followed watercourses, it would have needed to follow the Big or Little Blue rivers, crossed to the Platte River, and ...


Effects Of Chronic And Acute Y-Hydroxybutyrate Administration On Mass And The Release Of Growth Hormone And Corticosterone, Eric C. Goshorn Dec 1998

Effects Of Chronic And Acute Y-Hydroxybutyrate Administration On Mass And The Release Of Growth Hormone And Corticosterone, Eric C. Goshorn

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Science and Technology at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Eric C. Goshorn on December 10, 1998.


Short-Term Hooking Mortality Of Summer Flounder In New York And Virginia, Mark H. Malchoff, Jon A. Lucy Dec 1998

Short-Term Hooking Mortality Of Summer Flounder In New York And Virginia, Mark H. Malchoff, Jon A. Lucy

Reports

No abstract provided.


Meeting Minutes, December 8th, 1998, National Smokejumper Association Executive Committee Dec 1998

Meeting Minutes, December 8th, 1998, National Smokejumper Association Executive Committee

National Smokejumper Association Meeting Minutes

Agenda: Minutes: minutes of the meeting held l7 Nov 98.; Treasurer's Report: NSA is within budget for the year.; Membership Report: corrections of duplication of names and removal of the names of associate members that are no longer active.; Removed the names of many pilots who were not also smokejumpers.; Old Business: the "Hall of Fame" proposal was brought up.; Hall of Fame proposal be dropped.; Work on a brochure.; Adopt A Trail project.; Complaints covered in the letter.; New Business: Wildland Firefighter Monument.; Report on base activities for the news letter.;


Establishment Of A Functional Human Immunodeficiency Virus Type 1 (Hiv-1) Reverse Transcription Complex Involves The Cytoskeleton, Alissa G. Bukrinskaya, Beda Brichacek, Angela Mann, Mario Stevenson Dec 1998

Establishment Of A Functional Human Immunodeficiency Virus Type 1 (Hiv-1) Reverse Transcription Complex Involves The Cytoskeleton, Alissa G. Bukrinskaya, Beda Brichacek, Angela Mann, Mario Stevenson

Open Access Publications by UMass Chan Authors

After interaction of human immunodeficiency virus type 1 (HIV-1) virions with cell surface receptors, a series of poorly characterized events results in establishment of a viral reverse transcription complex in the host cell cytoplasm. This process is coordinated in such a way that reverse transcription is initiated shortly after formation of the viral reverse transcription complex. However, the mechanism through which virus entry and initiation of reverse transcription are coordinated and how these events are compartmentalized in the infected cell are not known. In this study, we demonstrate that viral reverse transcription complexes associate rapidly with the host cell cytoskeleton ...


Geographic Variation In Alarm Calls Of Gunnison's Prairie Dogs, C. N. Slobodchikoff, S. H. Ackers, M. Van Ert Dec 1998

Geographic Variation In Alarm Calls Of Gunnison's Prairie Dogs, C. N. Slobodchikoff, S. H. Ackers, M. Van Ert

Communication Skills Collection

Geographic variation in alarm calls of Gunnison's prairie dogs (Cynomys gunnisoni) was analyzed at regional and local scales. Alarm calls in response to a common stimulus (the same human) were recorded at four colonies near Flagstaff, Arizona, and at six sites throughout the southwestern United States. The acoustic structure of calls was analyzed for seven call variables. Regional differences fit the prediction of greater differences with increased geographical separation. Differences between colonies at a local scale were not related to geographical distance, suggesting that local dialects exist within a region. Differences in the level of predation by humans between ...


Inorganic Fertilization Of Walleye (Stizostedion Vitreum) Hatchery Ponds, Roderick J. Middleton Dec 1998

Inorganic Fertilization Of Walleye (Stizostedion Vitreum) Hatchery Ponds, Roderick J. Middleton

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Science and Technology at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Roderick J. Middleton on December 2, 1998.


Bulletin No. 36: Amphibians And Reptiles Of The Connecticut College Arboretum, Jill Devito, Joseph Markow Dec 1998

Bulletin No. 36: Amphibians And Reptiles Of The Connecticut College Arboretum, Jill Devito, Joseph Markow

Bulletins

No abstract provided.


Evaluation Of A Methyl Anthranilate-Based Bird Repellent: Toxicity To Channel Catfish Ictalurus Punctatus And Effect On Great Blue Heron Ardea Herodias Feeding Behavior, Brian S. Dorr, Larry Clark, Igor Mezine Dec 1998

Evaluation Of A Methyl Anthranilate-Based Bird Repellent: Toxicity To Channel Catfish Ictalurus Punctatus And Effect On Great Blue Heron Ardea Herodias Feeding Behavior, Brian S. Dorr, Larry Clark, Igor Mezine

Brian S Dorr

No abstract provided.


Parasitism Of Greenbugs (Homoptera: Aphididae) By Lysiphlebus Testaceipes (Hymenoptera: Braconidae) In Grain Sorghum: Implications For Augmentative Biological Control, Odair A. Fernandes, Robert J. Wright, Z. B. Mayo Dec 1998

Parasitism Of Greenbugs (Homoptera: Aphididae) By Lysiphlebus Testaceipes (Hymenoptera: Braconidae) In Grain Sorghum: Implications For Augmentative Biological Control, Odair A. Fernandes, Robert J. Wright, Z. B. Mayo

Faculty Publications: Department of Entomology

Field cage studies were conducted to describe the relationship between the percentage of Lysiphlebus testaceipes (Cresson) parasitism (as measured by aphid mummies) and densities of greenbug, Schizaphis graminum Rondani, on grain sorghum, Sorghum bicolor L. In 1993 and 1994, a biotype E-susceptible grain sorghum hybrid was grown in field cages and L. testaceipes adults were released after each plant was infested with 20 biotype E greenbugs. The release rates were 0, 0.5, 1.0, and 2.0 wasps per plant in 1993, and 0, 0.16, 0.33, and 0.5 wasps per plant in 1994. Greenbugs and mummies ...


Big River, Reggie Mcleod Dec 1998

Big River, Reggie Mcleod

Volume 6 – 1998

The monthly newsletter for people who live, work or play on the Upper Mississippi River. Volume 6, Number 12.


Sex Can Be Dangerous: Acoustically-Orienting Parasitoids On Field Crickets (Orthoptera: Gryllidae), Gita R. Kolluru Dec 1998

Sex Can Be Dangerous: Acoustically-Orienting Parasitoids On Field Crickets (Orthoptera: Gryllidae), Gita R. Kolluru

Biological Sciences

The Orthopterists' Society generously awarded me grants in 1995 and 1997 to conduct research on Teleogryllus oceanicus (Orthoptera: Gryllidae) on the Big Island of Hawaii. Here I report results to date from fieldwork conducted in the past few years.


Exploitations Of Sexual Signals By Predators And Parasitoids, Marlene Zuk, Gita R. Kolluru Dec 1998

Exploitations Of Sexual Signals By Predators And Parasitoids, Marlene Zuk, Gita R. Kolluru

Biological Sciences

Signals used to attract mates are often conspicuous to predators and parasites, and their evolution via sexual selection is expected to be opposed by viability selection. Many secondary sexual traits may represent a compromise between attractiveness and avoidance of detection. Although such signal exploitation appears to be widespread, most examples come from species that use acoustic or olfactory mating signals, and relatively few cases of visual signal exploitation can be substantiated. Because males are usually the signaling sex, they are more at risk from predators or parasitoids that locate prey or hosts by sexual signals; this differential selection on the ...


Verbena L., Gordon C. Tucker, Bot 4801 Students Dec 1998

Verbena L., Gordon C. Tucker, Bot 4801 Students

Specimens by Name

No abstract provided.


Effects Of Food Deprivation, Age, Time Of Day, And Gamma Irradiation On Attraction Of Mexican Fruit Flies (Diptera: Tephritidae) To Two Synthetic Lures In A Wind Tunnel, David C. Robacker Dec 1998

Effects Of Food Deprivation, Age, Time Of Day, And Gamma Irradiation On Attraction Of Mexican Fruit Flies (Diptera: Tephritidae) To Two Synthetic Lures In A Wind Tunnel, David C. Robacker

Entomology Papers from Other Sources

The physiological condition of Mexican fruit flies, Anastrepha ludens (Loew), affected their attraction to 2 similar but qualitatively different synthetic lures in wind-tunnel bioassays. The 2 lures were BioLure (ammonium acetate and putrescine) and AMPu (ammonium carbonate, methylamine HCI, and putrescine) . Effects of food deprivation on attraction to the lures were smaller than the effects of sex, time of day, and irradiation. Sugar-fed, protein-starved flies were attracted more strongly than other hunger-status groups to the lures. Sugar-starved, protein-starved females were less responsive than other groups of females to AMPu. Protein-starved males were more responsive than protein-fed males to BioLure. Females ...


Sp277-F-Azalea Leaf And Flower Gall, The University Of Tennessee Agricultural Extension Service Dec 1998

Sp277-F-Azalea Leaf And Flower Gall, The University Of Tennessee Agricultural Extension Service

Home Garden, Lawn, and Landscape

Leaf and flower galls are commonly found on many flowering woody hosts, most often on azalea and camellia. This disease occurs on plants in the Ericaceae or heath family, as well as on some species in the Empetraceae, Lauraceae, Symplocaceae and Theaceae families; including andromeda, arbutus, azalea, blueberry, camellia, huckleberry, Labrador tea, leatherleaf (Chamaedaphne calyculata), leucothoe, kalmia (mountain laurel) and rhododendron. Azalea leaf and flower gall, caused by the fungus Exobasidium vaccinii can occur on woody ornamentals growing outdoors in landscape plantings and in greenhouses. Disease is more common on plants growing in humid, sheltered areas with little air movement ...


Experiments To Maximize Growth In Captive Florida Pompano (Trachinotus Carolinus), Brian J. Hicks Dec 1998

Experiments To Maximize Growth In Captive Florida Pompano (Trachinotus Carolinus), Brian J. Hicks

HCNSO Student Theses and Dissertations

Florida pompano (Trachinotus carolinus) are highly prized food and sport fish indigenous to coastal areas of the southeastern United States. A commercially valuable fishery has historically existed in the Gulf of Mexico and on the South Atlantic seaboard. Efforts to economically culture Florida pompano in a captive environment were only partially successful. Four experiments were performed to explore the physical and environmental requirements of Florida pompano and other closely related species in the Family (Carangidae):

Experiment #1- Semi-natural spawning was induced with newly developed hormonal implants. to initiate and sustain semi-natural spawning in captive Florida pompano. Fish collected from the ...


The Nebline, December 1998 Dec 1998

The Nebline, December 1998

The NEBLINE Newsletter Archive from UNL Extension in Lancaster County

Contents:
Holiday legends,traditions & fun
Gardening resolutions
Keep trees fresh
Cyclamen care
Painting with plants
Pruning vines and groundcovers
Combing—a non-toxic method that can eliminate head lice
Our Christmas tree
A mouse in the house
A “must read” book
It’s a hit–20,000 hits!
Use and care of home humidifiers
Deadline near for requesting free inspection in compliance with Livestock Waste Management Act
Private applicators training
Crop Protection Clinic
The Power of a PTO
Beef home study course begins fifth year
Landlords need to reduce cash crop rental rates for '99
Developing your marketing plan
Chain saw ...