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Articles 31 - 60 of 65
Full-Text Articles in Entire DC Network
Effects Of Isolation On Ant Assemblages Depend On Microhabitat, Xuan Chen, Benjamin Adams, Michael Layne, Christopher Swarzenski, David Norris, Linda Hooper-Bui
Effects Of Isolation On Ant Assemblages Depend On Microhabitat, Xuan Chen, Benjamin Adams, Michael Layne, Christopher Swarzenski, David Norris, Linda Hooper-Bui
Faculty Publications
How isolation affects biological communities is a fundamental question in ecology and conservation biology. Local diversity (α) agnd regional diversity (γ) are consistently lower in insular areas. The pattern of species turnover (β diversity) and the influence of isolation on competitive interactions are less predictable. Differences in communities across microhabitats within an isolated patch could contribute to the variability in patterns related to isolation. Trees form characteristically dense and sparse patches (low vs. high isolation) in floating marshes in coastal Louisiana, and canopy and root areas around these trees could support distinct ant communities. Consequently, trees in floating marshes provide …
Internode Morphometrics And Allometry Of Tonkin Cane Pseudosasa Amabilis, Liang Cheng, Cang Hui, Gadi V.P. Reddy, Yu Long Ding, Pei Jian Shi
Internode Morphometrics And Allometry Of Tonkin Cane Pseudosasa Amabilis, Liang Cheng, Cang Hui, Gadi V.P. Reddy, Yu Long Ding, Pei Jian Shi
Faculty Publications
Pseudosasa amabilis (McClure) (Poales: Gramineae) is a typical bamboo species naturally distributed in large area of south China and famous for its culm strength. Although bamboos were found to share the same development rule, the detailed internode morphology of bamboo culm was actually not fully expressed. We explored internode morphology of P. amabilis using 11 different physical parameters in different dimensions (1–4). As Taylor's power law (TPL) is generally applicable to describe relationship between mean and variance of population density, here we used TPL to evaluate the differences between internodes, and further, the relationship between dimension and TPL. Results showed …
The Stadium Effect: Rodent Damage Patterns In Rice Fields Explored Using Giving-Up Densities, Clare R. Jones, Renee P. Lorica, James M. Villegas, Angelee F. Ramal, Finbarr G. Horgan, Grant R. Singleton, Alexander M. Stuart
The Stadium Effect: Rodent Damage Patterns In Rice Fields Explored Using Giving-Up Densities, Clare R. Jones, Renee P. Lorica, James M. Villegas, Angelee F. Ramal, Finbarr G. Horgan, Grant R. Singleton, Alexander M. Stuart
Faculty Publications
Rodents are globally important pre-harvest pests of rice. In Southeast Asia, rodent damage to growing rice crops is commonly concentrated towards the center of rice fields, away from the field edge, resulting in a clear pattern known as the “stadium effect.” To further understand this behavior of rodent pests and to develop recommendations for future research and management, we examined the relation between giving-up densities (GUDs) and damage patterns. In Tanay, Luzon, Philippines, GUD trays containing pieces of coconut in a matrix of sand were placed at 4 different distances from the field edge to quantify the perceived risk of …
Long-Term Entomological Research On Canopy Arthropods In A Tropical Rainforest In Puerto Rico, T. D. Schowalter
Long-Term Entomological Research On Canopy Arthropods In A Tropical Rainforest In Puerto Rico, T. D. Schowalter
Faculty Publications
No abstract provided.
Molecular Genetics Of Cold Tolerance At Germination And Seedling Stages In Rice, Anna Hissahe Borjas Artica
Molecular Genetics Of Cold Tolerance At Germination And Seedling Stages In Rice, Anna Hissahe Borjas Artica
LSU Master's Theses
Low temperature stress is a major constraint for rice production in temperate and high altitude areas of the world. Delayed germination coupled with reduced seedling vigor hinders crop establishment and crop growth resulting in reduced rice productivity. Mapping of chromosomal regions controlling cold tolerance will accelerate marker-assisted breeding of cold tolerant rice varieties. A recombinant inbred line (RIL) mapping population involving a rice cultivar ‘Bengal’ and a US weedy rice accession ‘PSRR-1’ was evaluated for cold tolerance at both germination and seedling stages. Observations on germinating ability and seedling vigor were recorded under both low temperature (13oC) and optimum temperature …
Constraining Ribbon Rock Dolomitization By Mg Isotopes: Implications For The ‘Dolomite Problem’, Fang Bing Li, Fang Zhen Teng, Ji Tao Chen, Kang Jun Huang, Shui Jiong Wang, Xian Guo Lang, Hao Ran Ma, Yong Bo Peng, Bing Shen
Constraining Ribbon Rock Dolomitization By Mg Isotopes: Implications For The ‘Dolomite Problem’, Fang Bing Li, Fang Zhen Teng, Ji Tao Chen, Kang Jun Huang, Shui Jiong Wang, Xian Guo Lang, Hao Ran Ma, Yong Bo Peng, Bing Shen
Faculty Publications
© 2016 Elsevier B.V. Modern dolomite formation is conditional and restricted in specific environmental and geochemical conditions, accordingly cannot be used as the analog of ancient dolostones, which normally have platform-wide distribution. The key to understand ancient dolostone formation is to find a dolomitization process that is independent of physical/geochemical environments. It is well-known that ribbon rock (one type of calcareous rhythmites, sensu stricto referring to the alternating limestone and marlstone layers or the limestone-marl alternations) that are deposited in nearly all marine environments throughout the Earth's history, are exclusively, though normally partially, dolomitized. Thus, understanding ribbon rock dolomitization may …
Phosphogenesis Associated With The Shuram Excursion: Petrographic And Geochemical Observations From The Ediacaran Doushantuo Formation Of South China, Huan Cui, Shuhai Xiao, Chuanming Zhou, Yongbo Peng, Alan J. Kaufman, Rebecca E. Plummer
Phosphogenesis Associated With The Shuram Excursion: Petrographic And Geochemical Observations From The Ediacaran Doushantuo Formation Of South China, Huan Cui, Shuhai Xiao, Chuanming Zhou, Yongbo Peng, Alan J. Kaufman, Rebecca E. Plummer
Faculty Publications
© 2016 Elsevier B.V. The Ediacaran Period witnessed one of the largest phosphogenic events in Earth's history. Coincidently, some phosphorite deposits in South China are associated with the largest-known carbon isotope negative excursion (i.e., Shuram Excursion), suggesting an intimate coupling of the biogeochemical carbon and phosphorous cycles. However, the geomicrobiological linkage between these anomalies remain poorly understood. In this study, we investigated the phosphorite samples from the uppermost Doushantuo Formation in South China. Carbon isotope compositions of authigenic calcite cements and nodules in the phosphorites are as low as –34‰ (VPDB). Petrographic and geochemical investigations indicate that the 13C-depleted carbonates …
Attribute Analysis Of Aridity Variability In North Xinjiang, China, Yanfeng Wu, Guangxin Zhang, Hong Shen, Y. Jun Xu, Batur Bake
Attribute Analysis Of Aridity Variability In North Xinjiang, China, Yanfeng Wu, Guangxin Zhang, Hong Shen, Y. Jun Xu, Batur Bake
Faculty Publications
Identifying the dominant meteorological factors affecting aridity variability can improve our understanding of climate change and its future trend in arid and semiarid regions. This study investigated the spatiotemporal aridity variability in North Xinjiang, China, from 1961 to 2013, based on the UNESCO aridity index (precipitation/potential evapotranspiration), and analyzed its association with meteorological factors. The results suggest that North Xinjiang is becoming more humid with an increasing trend in aridity index. Precipitation, temperature, and relative humidity have positive correlation with aridity, and evapotranspiration, sunshine hours, and wind speed have negative correlation with aridity. Wind speed and sunshine hours have a …
Premature Mortality From Cardiovascular Disease In The Americas - Will The Goal Of A Decline Of "25% By 2025" Be Met?, Pedro Ordunez, Elisa Prieto-Lara, Vilma Pinheiro Gawryszewski, Anselm J.M. Hennis, Richard S. Cooper
Premature Mortality From Cardiovascular Disease In The Americas - Will The Goal Of A Decline Of "25% By 2025" Be Met?, Pedro Ordunez, Elisa Prieto-Lara, Vilma Pinheiro Gawryszewski, Anselm J.M. Hennis, Richard S. Cooper
Faculty Publications
Background Cardiovascular diseases (CVD) are the underlying cause 1.6 million deaths per year in the Americas, accounting for 30% of total mortality and 38% of by non-communicable deaths diseases (NCDs). A 25% reduction in premature mortality due four main NCDs was targeted by the 2011 High-level Meeting of the General Assembly on the Prevention and Control of NCDs. While overall CVD mortality fell in the Americas during the past decade, trends in premature CVD mortality during the same period have not been described, particularly in the countries of Latin America and the Caribbean. Methods This is a population-based trend-series study …
Human Impact Overwhelms Long-Term Climate Control Of Weathering And Erosion In Southwest China, Shiming Wan, Samuel Toucanne, Peter D. Clift, Debo Zhao, Germain Bayon, Zhaojie Yu, Guanqiang Cai, Xuebo Yin, Sidonie Révillon, Dawei Wang, Anchun Li, Tiegang Li
Human Impact Overwhelms Long-Term Climate Control Of Weathering And Erosion In Southwest China, Shiming Wan, Samuel Toucanne, Peter D. Clift, Debo Zhao, Germain Bayon, Zhaojie Yu, Guanqiang Cai, Xuebo Yin, Sidonie Révillon, Dawei Wang, Anchun Li, Tiegang Li
Faculty Publications
© 2015 Geological Society of America. During the Holocene there has been a gradual increase in the influence of humans on Earth systems. High-resolution sedimentary records can help us to assess how erosion and weathering have evolved in response to recent climatic and anthropogenic disturbances. Here we present data from a high-resolution (~75 cm/k.y.) sedimentary archive from the South China Sea. Provenance data indicate that the sediment was derived from the Red River, and can be used to reconstruct the erosion and/or weathering history in this river basin. Accelerator mass spectrometry 14C dating provides direct age control and reveals coherent …
Untangling Earth System Responses Recorded In Sulfate's Sulfur And Oxygen Isotopes At The Dawn Of Multicellular Life And Today, Bryan Alan Killingsworth
Untangling Earth System Responses Recorded In Sulfate's Sulfur And Oxygen Isotopes At The Dawn Of Multicellular Life And Today, Bryan Alan Killingsworth
LSU Doctoral Dissertations
Major Earth system perturbations in the deep past and today are recorded in sulfate sulfur and oxygen isotopes, as examined here in three cases. (1) Sedimentary sulfate record of the “Marinoan Oxygen-17 Depletion” (MOSD) event, implies ultra-high CO2 atmosphere at ~635 Ma after global glaciation. MOSD duration is constrained by correlating its most complete record to radiometric dates. Barium sulfate layers in South China sediments show the MOSD in lower layers but persistently absent up section. Carbon-13 correlation locates the MOSD within dated intervals from other sites, yielding a 0 - 0.99 Myr duration. Thus, sedimentary constraint on this non-steady-state …
The Influence Of Selected Factors On The Science Achievement Of Eighth Grade Students In Louisiana, John Dana Gaspard
The Influence Of Selected Factors On The Science Achievement Of Eighth Grade Students In Louisiana, John Dana Gaspard
LSU Doctoral Dissertations
The primary purpose of this study is to determine the influence of selected demographic and academic factors on the science achievement among middle school students in Louisiana. The dependent variable for this study was Science achievement as measured by the Eighth Grade LEAP Test. The independent variables consisted of selected demographic characteristics and student scores on the ELA, Reading, Mathematics, and Social Studies sections of the Eighth Grade LEAP Test and their subtests. The target population of this study was Eighth Grade students in the public schools of Louisiana who were required to successfully complete the LEAP test in order …
Reevaluating The Conceptual Framework For Applied Research On Host-Plant Resistance, Michael J. Stout
Reevaluating The Conceptual Framework For Applied Research On Host-Plant Resistance, Michael J. Stout
Faculty Publications
Applied research on host-plant resistance to arthropod pests has been guided over the past 60 years by a framework originally developed by Reginald Painter in his 1951 book, Insect Resistance in Crop Plants. Painter divided the "phenomena" of resistance into three "mechanisms," nonpreference (later renamed antixenosis), antibiosis, and tolerance. The weaknesses of this framework are discussed. In particular, this trichotomous framework does not encompass all known mechanisms of resistance, and the antixenosis and antibiosis categories are ambiguous and inseparable in practice. These features have perhaps led to a simplistic approach to understanding arthropod resistance in crop plants. A dichotomous scheme …
Upturn Observed In Heavy Nuclei To Iron Ratios By The Atic-2 Experiment, A. D. Panov, N. V. Sokolskaya, V. I. Zatsepin, J. H. Adams, H. S. Ahn, G. L. Bashindzhagyan, J. Chang, M. Christl, A. R. Fazely, T. G. Guzik, J. Isbert, K. C. Kim, E. N. Kouznetsov, M. I. Panasyuk, E. S. Seo, J. W. Watts, J. P. Wefel, J. Wu
Upturn Observed In Heavy Nuclei To Iron Ratios By The Atic-2 Experiment, A. D. Panov, N. V. Sokolskaya, V. I. Zatsepin, J. H. Adams, H. S. Ahn, G. L. Bashindzhagyan, J. Chang, M. Christl, A. R. Fazely, T. G. Guzik, J. Isbert, K. C. Kim, E. N. Kouznetsov, M. I. Panasyuk, E. S. Seo, J. W. Watts, J. P. Wefel, J. Wu
Faculty Publications
The ratios of fluxes of heavy nuclei from sulfur (Z=16) to chromium (Z=24) to the flux of iron were measured by the ATIC-2 experiment. The ratios are decreasing functions of energy from 5 GeV/n to approximately 80 GeV/n, as expected. However, an unexpected sharp upturn in the ratios are observed for energies above 100 GeV/n for all elements from Z=16 to Z=24. Similar upturn but with lower amplitude was also discovered in the ATIC-2 data for the ratio of fluxes of abundant even nuclei (C, O, Ne, Mg, Si) to the flux of iron. Therefore the spectrum of iron is …
Functional Analysis Of General Odorant Binding Protein 2 From The Meadow Moth, Loxostege Sticticalis L. (Lepidoptera: Pyralidae), Jiao Yin, Honglin Feng, Hongyan Sun, Jinghui Xi, Yazhong Cao, Kebin Li
Functional Analysis Of General Odorant Binding Protein 2 From The Meadow Moth, Loxostege Sticticalis L. (Lepidoptera: Pyralidae), Jiao Yin, Honglin Feng, Hongyan Sun, Jinghui Xi, Yazhong Cao, Kebin Li
Faculty Publications
Odorant binding proteins play a crucial role in transporting semiochemicals across the sensillum lymph to olfactory receptors within the insect antennal sensilla. In this study, the general odorant binding protein 2 gene was cloned from the antennae of Loxostege sticticalis, using reverse transcription PCR and rapid amplification of cDNA ends. Recombinant LstiGOBP2 was expressed in Escherichia coli and purified by Ni ion affinity chromatography. Real-time PCR assays indicated that LstiGOBP2 mRNA is expressed mainly in adult antennae, with expression levels differing with developmental age. Ligand-binding experiments using N-phenyl-naphthylamine (1-NPN) as a fluorescent probe demonstrated that the LstiGOBP2 protein has binding …
Modern Political Communication Challenges For The Central Chinese Government, Ryan Martin
Modern Political Communication Challenges For The Central Chinese Government, Ryan Martin
Honors Capstones
No abstract provided.
Critical Ee At Osbg: A Case Study In Addressing Environmental Action Through Critical Education, Donovon Keith Ceaser
Critical Ee At Osbg: A Case Study In Addressing Environmental Action Through Critical Education, Donovon Keith Ceaser
LSU Master's Theses
Within environmental education the promotion of environmental activism is still considered contentious despite being a major goal since its inception. While some argue on simply raising awareness a growing number believe an action component is necessary to produce citizens capable of addressing environmental issues. Critical environmental education (Critical EE) is one method of integrating action into an educational program that teaches students to better understand the social and natural environment through an integrative participatory teaching-learning culture which allows students to construct contextual value-laden knowledge. This study uses data gathered from six months of participant observation at Our School at Blair …
Faculty Senate Newsletter, September 2011, Louisiana State University And Agricultural & Mechanical College
Faculty Senate Newsletter, September 2011, Louisiana State University And Agricultural & Mechanical College
LSU Faculty Senate Publications
Message from President: It would be fair enough to borrow from Shakespeare and proclaim the long budget crisis, which bodes to run from 2008 until 2013, as the fully nuclear winter of our discontent. Alas for the spirits of sorrow, the perpetual summer of our tropical state leaves us without adequate imagery to describe the gloom that pervades a campus that has been daunted by the people’s penury and demoralized by unaccountable private critics of exposed public servants. As Shakespeare well understood when he analyzed King Richard III, the deformity of the world eventually deforms even the strongest soul. Several …
The Impact Of Minority Status And Language Fluency On Vietnamese Asian Americans In The Predominately English-Speaking American Workplace, Lily L. Truong
The Impact Of Minority Status And Language Fluency On Vietnamese Asian Americans In The Predominately English-Speaking American Workplace, Lily L. Truong
Honors Capstones
No abstract provided.
Stories Of The Proterozoic Earth: Paleoproterozoic Chuanlinggou Arcitarchs And Neoproterozoic ¹⁷O-Depleted Barite, Yongbo Peng
Stories Of The Proterozoic Earth: Paleoproterozoic Chuanlinggou Arcitarchs And Neoproterozoic ¹⁷O-Depleted Barite, Yongbo Peng
LSU Doctoral Dissertations
This dissertation consists of two independent topics, both critical to understanding Earth history during the Proterozoic Eon. (1) Paleoproterozoic Chuanlinggou Acritarchs: The eukaryotic affinity of acritarchs from the Chuanlinggou Formation has been questioned because of lack of indisputable morphological evidence. In this study, Chuanlinggou acritarchs were examined by jointly using optical microscopy, scanning electron microscopy, and transmission electron microscopy. In most cases, an ovoidal group of acritarchs represents a half-vesicle following a complete longitudinal rupture, which is a morphological model different from a whole envelope with medial splits, as proposed by earlier studies. This ovoidal group displays a bipolar morphology, …
A Comparative Study Of Salt Tolerance Parameters In 11 Wild Relatives Of Arabidopsis Thaliana, Francesco Orsini, Matilde Paino D'Urzo, Gunsu Inan, Sara Serra, Dong Ha Oh, Michael V. Mickelbart, Federica Consiglio, Xia Li, Jae Cheol Jeong, Dae Jin Yun, Hans J. Bohnert, Ray A. Bressan, Albino Maggio
A Comparative Study Of Salt Tolerance Parameters In 11 Wild Relatives Of Arabidopsis Thaliana, Francesco Orsini, Matilde Paino D'Urzo, Gunsu Inan, Sara Serra, Dong Ha Oh, Michael V. Mickelbart, Federica Consiglio, Xia Li, Jae Cheol Jeong, Dae Jin Yun, Hans J. Bohnert, Ray A. Bressan, Albino Maggio
Faculty Publications
Salinity is an abiotic stress that limits both yield and the expansion of agricultural crops to new areas. In the last 20 years our basic understanding of the mechanisms underlying plant tolerance and adaptation to saline environments has greatly improved owing to active development of advanced tools in molecular, genomics, and bioinformatics analyses. However, the full potential of investigative power has not been fully exploited, because the use of halophytes as model systems in plant salt tolerance research is largely neglected. The recent introduction of halophytic Arabidopsis-Relative Model Species (ARMS) has begun to compare and relate several unique genetic resources …
Fatty-Acids And Their Δ 13C Characteristics Of Seep Carbonates From The Northern Continental Slope Of Gulf Of Mexico, Hong Xiang Guan, Dong Feng, Neng You Wu, Duo Fu Chen, H. H. Roberts, Dai Dai Wu
Fatty-Acids And Their Δ 13C Characteristics Of Seep Carbonates From The Northern Continental Slope Of Gulf Of Mexico, Hong Xiang Guan, Dong Feng, Neng You Wu, Duo Fu Chen, H. H. Roberts, Dai Dai Wu
Faculty Publications
Here we reported the fatty-acids and their δ C values in seep carbonates collected from Green Canyon lease block 185 (GC 185; Sample GC-F) at upper continental slope (water depth: ~540 m), and Alaminos Canyon lease block 645 (GC 645; Sample AC-E) at lower continental slope (water depth: ~2200 m) of the Gulf of Mexico. More than thirty kinds of fatty acids were detected in both samples. These fatty acids are maximized at C . There is a clear even-over-odd carbon number predominance in carbon number range. The fatty acids are mainly composed of n-fatty acids, iso-/anteiso-fatty acids and terminally …
Edaphic And Vegetative Controls On Mercury Cycling In Oligohaline Wetlands, Jonathan M. Willis
Edaphic And Vegetative Controls On Mercury Cycling In Oligohaline Wetlands, Jonathan M. Willis
LSU Doctoral Dissertations
With the expansion of the human population and associated industries there is a concomitant increase in both resource utilization and the production of waste and deleterious by-products. Mercury is a naturally-occurring toxic metal with a complicated and unique biogeochemical cycle, and is often a contaminant of ecotoxicological concern in unindustrialized aquatic habitats. The research described herein was designed to elucidate multiple aspects regarding the behavior of mercury in oligohaline wetland habitats, particularly with respect to edaphic and vegetative effects, through a monitoring and characterization study as well as a series of manipulative experiments. The observational study, conducted in the wetlands …
Energy Spectra Of Abundant Nuclei Of Primary Cosmic Rays From The Data Of Atic-2 Experiment: Final Results, A. D. Panov, Jr H. Adams, H. S. Ahn, G. L. Bashinzhagyan, J. W. Watts, J. P. Wefel, J. Wu, O. Ganel, T. G. Guzik, V. I. Zatsepin, I. Isbert, K. C. Kim, M. Christl, E. N. Kouznetsov, M. I. Panasyuk, E. S. Seo, N. V. Sokolskaya, J. Chang, W. K.H. Schmidt, A. R. Fazely
Energy Spectra Of Abundant Nuclei Of Primary Cosmic Rays From The Data Of Atic-2 Experiment: Final Results, A. D. Panov, Jr H. Adams, H. S. Ahn, G. L. Bashinzhagyan, J. W. Watts, J. P. Wefel, J. Wu, O. Ganel, T. G. Guzik, V. I. Zatsepin, I. Isbert, K. C. Kim, M. Christl, E. N. Kouznetsov, M. I. Panasyuk, E. S. Seo, N. V. Sokolskaya, J. Chang, W. K.H. Schmidt, A. R. Fazely
Faculty Publications
The final results of processing the data from the balloon-born experiment ATIC-2 (Antarctica, 2002 - 2003) for the energy spectra of protons and He, C, O, Ne, Mg, Si, and Fe nuclei, the spectrum of all particles, and the mean logarithm of atomic weight of primary cosmic rays as a function of energy are presented. The final results are based on improvement of the methods used earlier, in particular, considerably increased resolution of the charge spectrum. The preliminary conclusions on the significant difference in the spectra of protons and helium nuclei (the proton spectrum is steeper) and the non-power character …
Global Change And Eutrophication Of Coastal Waters, N N. Rabalais, R. Eugene Turner, R J. Diaz, D Justic, N N. Rabalais
Global Change And Eutrophication Of Coastal Waters, N N. Rabalais, R. Eugene Turner, R J. Diaz, D Justic, N N. Rabalais
Faculty Publications
The cumulative effects of global change, including climate change, increased population, and more intense industrialization and agri-business, will likely continue and intensify the course of eutrophication in estuarine and coastal waters. As a result, the symptoms of eutrophication, such as noxious and harmful algal blooms, reduced water quality, loss of habitat and natural resources, and severity of hypoxia (oxygen depletion) and its extent in estuaries and coastal waters will increase. Global climate changes will likely result in higher water temperatures, stronger stratification, and increased inflows of freshwater and nutrients to coastal waters in many areas of the globe. Both past …
Proxy Records Of Paleohurricanes For The Western And Southern Caribbean, Terrence Allen Mccloskey
Proxy Records Of Paleohurricanes For The Western And Southern Caribbean, Terrence Allen Mccloskey
LSU Doctoral Dissertations
This dissertation evaluates the hypothesis that hurricane activity levels in the North Atlantic during the late Holocene have been driven by latitudinal movements of the North Atlantic circulation system. Multi-millennial sedimentary proxy records, based on the occurrence of overwash clastic layers, provide clear evidence of abruptly alternating periods of hurricane landfall frequency for Nicaragua and Belize. Three Belizean transects exhibit an Active period (hyperactivity) occurring from ~2000-6000 cal yr BP, although dating is inconsistent across the transects. An Active period covering the last 500 years is found at one location. The Nicaraguan record, derived from three transects covering >90 km …
A Comparative Study Of Geometry Curricula, Robyn Williams Carlin
A Comparative Study Of Geometry Curricula, Robyn Williams Carlin
LSU Master's Theses
In the United States, geometry has long been offered to high school students in the tenth grade. Attempts have been made in recent years to expand the role of geometry across grades Pre-K through twelve. However, based on the latest TIMSS results, although students in the United States made gains in most content areas, they still struggle with geometric concepts compared to their counterparts in other nations of the world, primarily those in certain Asian countries like Singapore and China. We argue that the structure of the curriculum and the instructional strategies used in these countries may lead to more …
Ocean Urea Fertilization For Carbon Credits Poses High Ecological Risks, P.M. Glibert, R. Azanza, M. Burford, K. Furuya, E. Abal, A. Al-Azri, F. Al-Yamani, P. Andersen, D.M. Anderson, J. Beardall, G.M. Berg, L. Brand, D. Bronk, J. Brookes, J.M. Burkholder, A. Cembella, W.P. Cochlan, J.L. Collier, Y. Collos, R. Diaz, M. Doblin, T. Drennen, S. Dyhrman, Y. Fukuyo, M. Furnas, J. Galloway, E. Granéli, D.V. Ha, G. Hallegraeff, J. Harrison, P.J. Harrison, C.A. Heil, K. Heimann
Ocean Urea Fertilization For Carbon Credits Poses High Ecological Risks, P.M. Glibert, R. Azanza, M. Burford, K. Furuya, E. Abal, A. Al-Azri, F. Al-Yamani, P. Andersen, D.M. Anderson, J. Beardall, G.M. Berg, L. Brand, D. Bronk, J. Brookes, J.M. Burkholder, A. Cembella, W.P. Cochlan, J.L. Collier, Y. Collos, R. Diaz, M. Doblin, T. Drennen, S. Dyhrman, Y. Fukuyo, M. Furnas, J. Galloway, E. Granéli, D.V. Ha, G. Hallegraeff, J. Harrison, P.J. Harrison, C.A. Heil, K. Heimann
Faculty Publications
No abstract provided.
Sedimentary Fabrics In The Authigenic Carbonates From Bush Hill: Implication For Seabed Fluid Flow And Its Dynamic Signature, D. Feng, Duofu Chen, H. H. Roberts
Sedimentary Fabrics In The Authigenic Carbonates From Bush Hill: Implication For Seabed Fluid Flow And Its Dynamic Signature, D. Feng, Duofu Chen, H. H. Roberts
Faculty Publications
Seep carbonates, the product of cold seep fluids mediated by microbial activity, archive information on seabed fluid flow and microbiological processes that led to their formation. Sedimentary fabrics are well developed in the authigenic carbonate from active seep sites at Bush Hill, Green Canyon Block 185 of the Gulf of Mexico. This authigenic carbonate has much lower carbon isotope values than typical marine cements and the carbonate is concluded to be derived from the oxidation of seeping petroleum. The authigenic fabrics commonly exhibit microbial or texturally unique sedimentary structures; e.g. framboidal pyrite, clotted microfabric and peloid, botryoidal aragonite, microfilament, and …
Dam Impacts On The Changjiang (Yangtze) River Sediment Discharge To The Sea: The Past 55 Years And After The Three Gorges Dam, Z. Yang, H. Wang, Y. Saito, J. D. Milliman, K. Xu, S. Qiao, G. Shi
Dam Impacts On The Changjiang (Yangtze) River Sediment Discharge To The Sea: The Past 55 Years And After The Three Gorges Dam, Z. Yang, H. Wang, Y. Saito, J. D. Milliman, K. Xu, S. Qiao, G. Shi
Faculty Publications
No abstract provided.