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2007

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Articles 601 - 630 of 14126

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Effects Of Mineral Association And Aggregation On Particulate Organic Matter Composition In The Water Column, Lynn Abramson Dec 2007

Effects Of Mineral Association And Aggregation On Particulate Organic Matter Composition In The Water Column, Lynn Abramson

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

[to be added]

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Surface Modification Of Microfluidic Devices, P Kumlangdudsana, S T. Dubas, L Dubas Dec 2007

Surface Modification Of Microfluidic Devices, P Kumlangdudsana, S T. Dubas, L Dubas

Journal of Metals, Materials and Minerals

Microfluidic is a multidisciplinary which encompasses the fields of physics, chemistry, nanotechnology, engineering, and biotechnology. It has been developed extensively for many applications such as handling biological entities such as DNA separation, immunoassay, cell sorting, biosensors, and enzymatic assays due to the potential offered by miniaturizing, high throughput of analysis, low cost of fabrication, multiplex functionality and portability. The surface modification of microfluidic devices has also been a major focus in research to help to enhance their efficiency. There is a variety of surface modification methods and in this paper we reviews and presents an overview of the surface modification …

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A Sticky Situation: Functional Responses Of Mast Cells To Acidic Ph, Nicole Conaway Grose Dec 2007

A Sticky Situation: Functional Responses Of Mast Cells To Acidic Ph, Nicole Conaway Grose

Biology Dissertations - Archive

Precise regulation of extracellular pH is critical for proper function of many cellular activities. Minor fluctuations in pH can have profound effects on ion transport, receptor function, and cellular secretions. This work examines the impact of acidic pH, universal at sites of inflammation, on the activation status of mast cells. The mast cell line HMC-1 was used to explore activation by acidic pH. Activation of HMC-1 cells was characterized in cell adhesion, secretion of cytokines, and changes in cell morphology. HMC-1 adhesion to two substrates, collagen and laminin was measured at 0, 1 hr, 2 hrs, 4 hrs, and 6 …

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Efficacy Of A Series Of Organotin Polymers As Anticancer And Antiviral Drugs, Kimberly Rae Shahi Dec 2007

Efficacy Of A Series Of Organotin Polymers As Anticancer And Antiviral Drugs, Kimberly Rae Shahi

Biology Dissertations - Archive

Anticancer drugs have been shown to have antiviral abilities as well. The two types of diseases are similar in that they hold the cell in a continued growth phase. Therefore, if a drug has anticancer activity, it could have antiviral activity as well. I was interested in drugs that could inhibit DNA replication, since both cancer cells and cells infected with a DNA virus have increased DNA replication. Organotins are known to have anticancer activity and are thought to inhibit DNA replication. In this study, four cancer cell lines (from the NCI 60) and two DNA viruses, HSV-1 and vaccinia, …

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Niche Partitioning Between Eisenia Foetida (Lumbricidae) And Native Earthworms In Monteverde, Costa Rica, December 2007, Christine Askham Dec 2007

Niche Partitioning Between Eisenia Foetida (Lumbricidae) And Native Earthworms In Monteverde, Costa Rica, December 2007, Christine Askham

Monteverde Institute: Tropical Ecology and Conservation

With an increased susceptibility to invasive species due to deforestation, exotic species in tropical rainforests are quickly gaining potential to alter these already disappearing ecosystems. This study examined whether the exotic earthworm Eisenia foetida (Lumbricidae) has the potential to become an invasive species. Niche preference for level of organic soil content, level of soil texture, and humidity level was tested between native and exotic species in Monteverde, Puntarenas, Costa Rica. There was a significant difference for organic soil content level between native earthworms and E. foetida. This significant difference was present both when the exotics and natives were tested alone …

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Evidence Of Subsocial Behavior Through Analysis Of Prey Capture And Feeding In A New Species Of Anelosimus (Araneae: Theridiidae), December 2007, Aaron Mitchell-Dick Dec 2007

Evidence Of Subsocial Behavior Through Analysis Of Prey Capture And Feeding In A New Species Of Anelosimus (Araneae: Theridiidae), December 2007, Aaron Mitchell-Dick

Monteverde Institute: Tropical Ecology and Conservation

Sociality is a little studied, little occurring, and unique trait in spider biology. Recently, in the genus Anelosimus, where sociality has originated eight or nine times, research has shown that more quasisocial species exist at low elevations and almost all subsocial species at higher elevations. The purpose of this study was to determine the sociality of a new species of Anelosimus, and add to the knowledge base of social Anelosimus spiders. Analysis of prey capture and feeding has provided evidence for a subsocial classification. In 12 webs of a female and her offspring, juveniles coordinated efforts to capture prey. Almost …

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Pollen Diversity On Male Hylonycteris Underwoodi (Glossophaginae), December 2007, Julia Hoeh Dec 2007

Pollen Diversity On Male Hylonycteris Underwoodi (Glossophaginae), December 2007, Julia Hoeh

Monteverde Institute: Tropical Ecology and Conservation

Nectivorous bats play important roles in pollination systems in the tropics, by transferring pollen carried on their bodies between the plants that they visit for nectar. The purpose of this study was to evaluate diversity indices of pollen loads found on individuals of Hylonycteris underwoodi (Glossophaginae). It was conducted in the Selvatura Adventure Park in Monteverde, Costa Rica during the rainy season, and related pollen load diversity to aspect ratio, wing tip index, and mass of individuals (N = 30 males). The pollen load on individuals had low richness (2.20 ± 0.81), diversity (0.09 ± 0.16), and evenness (0.09 ± …

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Relationship Between Floral Advertisement And Pollinia Removal In Oerstedella Exasperata (Orchidaceae), December 2007, Mary Snayd Dec 2007

Relationship Between Floral Advertisement And Pollinia Removal In Oerstedella Exasperata (Orchidaceae), December 2007, Mary Snayd

Monteverde Institute: Tropical Ecology and Conservation

The purpose of this study was to examine how the floral displays and morphology of Oerstedella exasperata affect reproductive success. This species of orchid is typified by extreme variability in both inflorescence and floral characteristics. In particular there is a wide distribution regarding the degree of symmetry observed in the labellum. The degrees of symmetry are characterized by variations within the fringe symmetry and bilateral symmetry. Furthermore, the surface area of the labellum varies greatly within a population. These remarkably diverse phenotypic morphologies and the summation of the floral traits can enhance or reduce the reproductive success of particular species. …

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Prey Naiveté: Evolutionary And Ecological Implications, Jonathan G. Cox Dec 2007

Prey Naiveté: Evolutionary And Ecological Implications, Jonathan G. Cox

All-Inclusive List of Electronic Theses and Dissertations

Despite its ecological importance, the concept of prey naivete has become a biological truism that receives little study. I explored the evolution of naivete and its likely influence on two major ecological patterns: a) the historically greater destructiveness of freshwater predator introductions, and b) the greater strength of aquatic trophic cascades. In a review of the ecological literature, I demonstrate that the conditions for the evolution of naivete (isolation) exist in freshwater habitats at multiple spatial scales. In addition, I show that freshwater prey exhibit naivete which could be responsible for the high impacts of freshwater predator introductions. I then …

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Domestic Relations, Barry B. Mcgough, Gregory R. Miller Dec 2007

Domestic Relations, Barry B. Mcgough, Gregory R. Miller

Mercer Law Review

This survey period saw domestic relations law continue to evolve through new legislation and new case law. The 2006 Georgia legislature made dramatic changes to the child support calculations that took effect in 2007. The 2007 Georgia legislature has turned its focus to child custody issues, including passing laws requiring parenting plans in custody, allowing attorney fee awards, and allowing for direct appeals in child custody cases. The Georgia Supreme Court continued to accept nonfrivolous appeals in divorce cases, and as a result, the appellate courts have been able to give guidance to those interested in domestic relations law.

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Extended Visions, November/December 2007 Dec 2007

Extended Visions, November/December 2007

Extended Visions Newsletter (ARDC)

Contents:
ARDC Director's Comments
ARDC FEATURE UNIT - Foundation Seed Division
About the People
About the Research
Introducing Husker Genetics
How a University of Nebraska HUSKER GENETICS Foundation Seed Variety Goes from the Lab to the Farmer
Annual Festival Teaches Youth About Ag
Bergman Recognized at Retirement Reception
Dec. 6 Workshop to Focus on Alternative Energy for Home, Farm, and Acreages
December Programs... Ethanol By-Product Use for Cow/Calf Producers and Farmer Feeders
How the Field Days Stack Up
MEAD MAGNET Update - Mead High School Agriculture Student Works at the Swine Unit
Nebraska Soybean Day and Machinery Expo

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Endangered Species Bulletin: 2007 Highlights Dec 2007

Endangered Species Bulletin: 2007 Highlights

Endangered Species Bulletin

In this issue:
4 Measuring Recovery Success
6 Partnerships Can Conserve Species and a Way of Life
8 Rare Bird Nests Are Cause for Celebration
10 Jump Starting a Rabbit’s Recovery
11 Conserving a Natural Utah Treasure
12 New Hope for the Leon Springs Pupfish
14 Sometimes It’s the Little Things That Matter
16 Cooperative Conservation for the Page Springsnail
18 A Rare Plant Returns to San Francisco Bay
20 Fisheries and Habitat Conservation
22 Species Recovery Through Habitat and Resource Conservation
24 Fish and Wildlife Management Assistance
26 Partnerships for Shared Stewardship
28 The Environmental Contaminants Program
30 The …

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A Discrete Event Based Stochastic Simulation Approach For Studying The Dynamics Of Biological Networks, Samik Ghosh Dec 2007

A Discrete Event Based Stochastic Simulation Approach For Studying The Dynamics Of Biological Networks, Samik Ghosh

Computer Science and Engineering Dissertations - Archive

With increasing availability of data resources on the molecular parts of a living cell, biologists are focusing on holistic understanding of cellular mechanisms and the emergent dynamics arising out of their complex interactions. Comprehending the fine-grained signal specificity, gene regulation and feedback mechanisms of molecular interactions at a network level forms a central theme of systems biology. With the speed and sophistication of computational methods, in silico modeling and simulation techniques have become a powerful tool for biologists challenged with understanding the system complexity of biological networks. Numerical simulation of classical chemical kinetics (CCK), agent-based simulations of biological processes, and …

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Phylogeny Of The Grasses (Poaceae) Revisited, Melvin R. Duvall, Jerrold I Davis, Lynn G. Clark, Jeffrey D. Noll, Douglas H. Goldman, J. Gabriel Sánchez-Ken Dec 2007

Phylogeny Of The Grasses (Poaceae) Revisited, Melvin R. Duvall, Jerrold I Davis, Lynn G. Clark, Jeffrey D. Noll, Douglas H. Goldman, J. Gabriel Sánchez-Ken

Aliso: A Journal of Systematic and Floristic Botany

The most robust previously published phylogeny for the overall structure of the grass family (Poaceae) shows three early diverging lineages and two major derived clades, the BEP clade and the PACCAD clade (Grass Phylogeny Working Group 2001). A few key taxa were incompletely sampled, however, and support for the BEP clade was moderate at best and relationships among the major lineages within the PACCAD clade remained unresolved. In addition, recent studies indicated that the sister group to Poaceae may be Joinvilleaceae and/or Ecdeiocoleaceae, the latter of which were not previously sampled. In this study, missing structural data were determined and …

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Phylogeny And Biogeography Of Endemic Festuca (Poaceae) From New Zealand Based On Nuclear (Its) And Chloroplast (Trnl–Trnf) Nucleotide Sequences, Kelvin M. Lloyd, Angela M. Hunter, David A. Orlovich, Suzanne J. Draffin, Alan V. Stewart, William G. Lee Dec 2007

Phylogeny And Biogeography Of Endemic Festuca (Poaceae) From New Zealand Based On Nuclear (Its) And Chloroplast (Trnl–Trnf) Nucleotide Sequences, Kelvin M. Lloyd, Angela M. Hunter, David A. Orlovich, Suzanne J. Draffin, Alan V. Stewart, William G. Lee

Aliso: A Journal of Systematic and Floristic Botany

We investigated the phylogenetic relationships of the endemic New Zealand (NZ) species of Festuca (Poaceae, Pooideae) by assessing sequence variation from the nuclear internal transcribed spacers (ITS) and a chloroplast intergenic spacer (trnL–trnF) and by measuring DNA content using flow cytometry. The ITS and trnL–trnF data sets were congruent in showing that the NZ species of Festuca have two origins. One group, containing F. coxii, F. luciarum, F. multinodis, and F. ultramafica, is closely related to Festuca sect. Aulaxyper. The other group includes a clade of five endemic …

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Relationships Among Some Populations Of Anthoxanthum Alpinum And A. Odoratum (Poaceae, Pooideae): A Morphological/Anatomical Approach, Manuel Pimentel, Elvira Sahuquillo Dec 2007

Relationships Among Some Populations Of Anthoxanthum Alpinum And A. Odoratum (Poaceae, Pooideae): A Morphological/Anatomical Approach, Manuel Pimentel, Elvira Sahuquillo

Aliso: A Journal of Systematic and Floristic Botany

The genus Anthoxanthum s.l. (including Hierochloë) (Poaceae, Pooideae, Aveneae) comprises 35–50 species and has a cosmopolitan distribution. Anthoxanthum alpinum was described as a diploid perennial that is distributed in northern Eurasia and in the high mountains of central and eastern Europe. Difficulties in finding reliable morphological differences between this taxon and the widespread tetraploid A. odoratum have resulted in taxonomists treating them as conspecific, despite the cytological differentiation. The purpose of this study was to provide information that may help clarify the relationships between these taxa. Macromorphologial, micromorphological, and anatomical data were gathered and analyzed for 14 populations representing …

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Systematics Of Bromelioideae (Bromeliaceae)—Evidence From Molecular And Anatomical Studies, Ralf Horres, Katharina Schulte, Kurt Weising, Georg Zizka Dec 2007

Systematics Of Bromelioideae (Bromeliaceae)—Evidence From Molecular And Anatomical Studies, Ralf Horres, Katharina Schulte, Kurt Weising, Georg Zizka

Aliso: A Journal of Systematic and Floristic Botany

A reconstruction of the phylogeny of Bromeliaceae based on sequence data from three noncoding chloroplast DNA markers (trnL intron, trnT–trnL, and trnT–trnF intergenic spacer [IGS]) is presented, including 26 genera and 33 species. Relationships of Bromelioideae and phylogeny within this subfamily were analyzed in more detail on the basis of two of these markers (trnL intron and trnL–trnF IGS) using a set of 37 genera/74 species of Bromeliaceae, including 28 genera/60 species of Bromelioideae. Sister group relationships of Bromelioideae were not resolved with sufficient reliability, but the …

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Phylogeny Of Abildgaardieae (Cyperaceae) Inferred From Its And Trnl–F Data, Kioumars Ghamkhar, Adam D. Marchant, Karen L. Wilson, Jeremy J. Bruhl Dec 2007

Phylogeny Of Abildgaardieae (Cyperaceae) Inferred From Its And Trnl–F Data, Kioumars Ghamkhar, Adam D. Marchant, Karen L. Wilson, Jeremy J. Bruhl

Aliso: A Journal of Systematic and Floristic Botany

Within the tribe Abildgaardieae, the relationships between Fimbristylis and its relatives have not been certain, and the limits of Fimbristylis have been unclear, with Bulbostylis and Abildgaardia variously combined with it and each other. The relationships and limits of tribes Abildgaardieae and Arthrostylideae and their genera were evaluated across 49 representative species using parsimony and maximum likelihood analyses of ITS (nuclear ribosomal) and trnL–F (plastid) DNA sequence data separately and combined. The evolutionary reconstructions derived from sequences of cpDNA and nrDNA disagree about the position of tribe Arthrostylideae relative to Abildgaardieae; Arthrostylis and Actinoschoenus are either nested within Abildgaardieae …

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Phylogeny And Historical Ecology Of Rhodocoma (Restionaceae) From The Cape Floristic Region, Christopher R. Hardy, H. Peter Linder Dec 2007

Phylogeny And Historical Ecology Of Rhodocoma (Restionaceae) From The Cape Floristic Region, Christopher R. Hardy, H. Peter Linder

Aliso: A Journal of Systematic and Floristic Botany

A macroevolutionary analysis of macroecological relationships in Rhodocoma revealed a complex history of rapid ecological divergence, as well as genetic isolation via shifts in flowering times. The rate and extent of divergence observed among even the youngest of species pairs indicated that the selective forces driving these processes are strong enough to effect substantial amounts of ecological change in relatively short periods of time, and are potentially important factors promoting the origin and persistence of species diversity not only in Rhodocoma, but also the African Restionaceae as a whole. These results also suggest that the rate and extent of …

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Large Trees, Supertrees, And Diversification Of The Grass Family, Trevor R. Hodkinson, Nicolas Salamin, Mark W. Chase, Yanis Bouchenak-Khelladi, Stephen A. Renvoize, Vincent Savolainen Dec 2007

Large Trees, Supertrees, And Diversification Of The Grass Family, Trevor R. Hodkinson, Nicolas Salamin, Mark W. Chase, Yanis Bouchenak-Khelladi, Stephen A. Renvoize, Vincent Savolainen

Aliso: A Journal of Systematic and Floristic Botany

Phylogenetic studies of grasses (Poaceae) are advanced in comparison with most other angiosperm families. However, few studies have attempted to build large phylogenetic trees of the family and use these for evaluating patterns of diversification or other macroevolutionary hypotheses. Two contrasting approaches can be used to generate large trees: supermatrix analyses and supertrees. In this paper, we evaluated the suitability of each of these methods for the study of patterns and processes of evolution in the grasses. We collected data from DDBJ/EMBL/GenBank to determine sequence availability and asked how far we are from a complete generic-level phylogenetic tree of the …

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Allopolyploids Of The Genus Elymus (Triticeae, Poaceae): A Phylogenetic Perspective, Roberta J. Mason-Gamer Dec 2007

Allopolyploids Of The Genus Elymus (Triticeae, Poaceae): A Phylogenetic Perspective, Roberta J. Mason-Gamer

Aliso: A Journal of Systematic and Floristic Botany

The wheat tribe, Triticeae, includes many genomically distinct polyploid taxa. Elymus is an entirely allopolyploid genus, with all species containing the St genome of Pseudoroegneria. The St genome may be combined with one or more distinct genomes representing multiple, diverse diploid donors from throughout the tribe. This study includes a simultaneous phylogenetic analysis of new and previously published data from several distinct Elymus groups, including North American and Eurasian StStHH tetraploids, in which the H genome is derived from Hordeum, Eurasian StStYY tetraploids, in which the Y genome is derived from an unknown donor, and a putative StStStStHH …

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Molecular Phylogenetics Of Bromus (Poaceae: Pooideae) Based On Chloroplast And Nuclear Dna Sequence Data, Jeffery M. Saarela, Paul M. Peterson, Ryan M. Keane, Jacques Cayouette, Sean W. Graham Dec 2007

Molecular Phylogenetics Of Bromus (Poaceae: Pooideae) Based On Chloroplast And Nuclear Dna Sequence Data, Jeffery M. Saarela, Paul M. Peterson, Ryan M. Keane, Jacques Cayouette, Sean W. Graham

Aliso: A Journal of Systematic and Floristic Botany

We conducted a phylogenetic analysis to characterize relationships among Bromus and test the monophyly of five of the seven morphologically distinct groups within Bromus (Poaceae: Pooideae) that have been treated as sections, subgenera, or genera. We sequenced the chloroplast trnL (UAA) intron, the 3'-end of the chloroplast ndhF gene, and the internal transcribed spacers (ITS) of the nuclear ribosomal DNA region for 46 species that represent a large proportion of the morphological and geographical diversity in the genus. Independent analyses of plastid and nuclear ribosomal data identified several lineages in Bromus, but there is some evidence of …

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Dicliny In Bouteloua (Poaceae: Chloridoideae): Implications For The Evolution Of Dioecy, Michael S. Kinney, J. Travis Columbus, Elizabeth A. Friar Dec 2007

Dicliny In Bouteloua (Poaceae: Chloridoideae): Implications For The Evolution Of Dioecy, Michael S. Kinney, J. Travis Columbus, Elizabeth A. Friar

Aliso: A Journal of Systematic and Floristic Botany

The New World grass genus Bouteloua (Chloridoideae: Cynodonteae) comprises 57 species, 13 of which produce unisexual spikelets and hence are diclinous. Andromonoecy, gynodioecy, monoecy, trimonoecy, and dioecy all occur in the genus, and ten species are known to express more than one of these breeding systems. Employing a phylogenetic estimate based on parsimony analysis of DNA sequences from the ITS (nrDNA) and trnL–F (cpDNA) regions representing 35 species of Bouteloua, including ten of 13 diclinous species, we used parsimony character state reconstructions to investigate the evolution of unisexual spikelets and breeding systems. Our specific goals were to estimate …

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Bacterial Diversity In Ornithogenic Soils From Signy Island Maritime Antarctic - Temporal Ariafion, C.W. Chong, G.Y.A. Tan, R.C.S. Wong, I.K.P. Tan Dec 2007

Bacterial Diversity In Ornithogenic Soils From Signy Island Maritime Antarctic - Temporal Ariafion, C.W. Chong, G.Y.A. Tan, R.C.S. Wong, I.K.P. Tan

Research Publications (2006 to 2010)

No abstract provided.

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Bioactivities Of Auricularia Auricular-Judae (Fr: Quel), V. Nagarathinam, N. Abdullah, N. Zainal Abidin Dec 2007

Bioactivities Of Auricularia Auricular-Judae (Fr: Quel), V. Nagarathinam, N. Abdullah, N. Zainal Abidin

Research Publications (2006 to 2010)

No abstract provided.

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Determination And Characterization Of Extended-Spectrum P-Lactamases Producing Klebsiella Strains Isolated In Malaysia, K.T. Lim, R.M. Yasin, C.C. Yeo, S.D. Puthucheary, Kwai Lin Thong Dec 2007

Determination And Characterization Of Extended-Spectrum P-Lactamases Producing Klebsiella Strains Isolated In Malaysia, K.T. Lim, R.M. Yasin, C.C. Yeo, S.D. Puthucheary, Kwai Lin Thong

Research Publications (2006 to 2010)

No abstract provided.

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Development Of A Novel Mutant From In-Vitro Exotic Water Trumpet Cryptocoryne Willisii Engler Ex Baum Through Gamma Irradiation, N. Sahidin, R.Y. Othman, N. Khalid Dec 2007

Development Of A Novel Mutant From In-Vitro Exotic Water Trumpet Cryptocoryne Willisii Engler Ex Baum Through Gamma Irradiation, N. Sahidin, R.Y. Othman, N. Khalid

Research Publications (2006 to 2010)

No abstract provided.

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Effects Of Genistein On The Development Of The Male Reproductive System, S.B.S.A. Fuad, M.A. Mohd, N.M. Kassim Dec 2007

Effects Of Genistein On The Development Of The Male Reproductive System, S.B.S.A. Fuad, M.A. Mohd, N.M. Kassim

Research Publications (2006 to 2010)

No abstract provided.

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Establishment Of Cell And Root Suspension Cultures From Curcuma Xanthorhiza For The Production Of Xanthorhizol, M. Mohamed, H. Ibrahim, M.S.M. Annuar, N. Khalid Dec 2007

Establishment Of Cell And Root Suspension Cultures From Curcuma Xanthorhiza For The Production Of Xanthorhizol, M. Mohamed, H. Ibrahim, M.S.M. Annuar, N. Khalid

Research Publications (2006 to 2010)

No abstract provided.

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In Vitro Study Of Human Amniotic Membrane As A Chondrocyte Carrier, L. Boo, L.T. Sik, P.C. Pan, S. Sofiah, L. Selvaratnam, C.T. Cheh, T. Sara, Tunku Kamarul Dec 2007

In Vitro Study Of Human Amniotic Membrane As A Chondrocyte Carrier, L. Boo, L.T. Sik, P.C. Pan, S. Sofiah, L. Selvaratnam, C.T. Cheh, T. Sara, Tunku Kamarul

Research Publications (2006 to 2010)

No abstract provided.

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