Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Earth Sciences (16248)
- Geology (13576)
- Life Sciences (3500)
- Computer Sciences (3464)
- Environmental Sciences (2811)
-
- Engineering (2086)
- Chemistry (1794)
- Soil Science (1672)
- Plant Sciences (1632)
- Social and Behavioral Sciences (1459)
- Physics (1366)
- Mathematics (1340)
- Sustainability (1010)
- Artificial Intelligence and Robotics (827)
- Medicine and Health Sciences (812)
- Computer Engineering (780)
- Ecology and Evolutionary Biology (763)
- Oceanography and Atmospheric Sciences and Meteorology (696)
- Statistics and Probability (661)
- Environmental Education (519)
- Natural Resources and Conservation (493)
- Electrical and Computer Engineering (478)
- Urban Studies and Planning (470)
- Education (466)
- Environmental Monitoring (451)
- Numerical Analysis and Scientific Computing (442)
- Databases and Information Systems (438)
- Astrophysics and Astronomy (428)
- Natural Resources Management and Policy (416)
- Institution
-
- Western Michigan University (13205)
- University of Kentucky (1719)
- TÜBİTAK (651)
- University of Nebraska - Lincoln (649)
- Singapore Management University (573)
-
- Loyola Marymount University and Loyola Law School (445)
- Old Dominion University (373)
- China Simulation Federation (315)
- University of Texas Rio Grande Valley (251)
- City University of New York (CUNY) (219)
- Chulalongkorn University (215)
- University of South Carolina (213)
- China Coal Technology and Engineering Group (CCTEG) (204)
- Montana Tech Library (195)
- Western University (194)
- University of Texas at El Paso (187)
- Utah State University (183)
- Kennesaw State University (181)
- Missouri University of Science and Technology (181)
- University of South Florida (174)
- Louisiana State University (171)
- Portland State University (170)
- William & Mary (162)
- University of Arkansas, Fayetteville (153)
- Air Force Institute of Technology (149)
- Boise State University (143)
- Technological University Dublin (130)
- University of Nevada, Las Vegas (128)
- Claremont Colleges (111)
- The University of Maine (110)
- Keyword
-
- Machine learning (190)
- Deep learning (163)
- Climate change (135)
- COVID-19 (125)
- Machine Learning (120)
-
- Technical Reports (109)
- UTEP Computer Science Department (109)
- Deep Learning (76)
- Alfalfa (73)
- Sustainability (70)
- Priority Soils (65)
- Mathematics (61)
- Artificial intelligence (59)
- Computer Science (59)
- Chemistry (58)
- Simulation (54)
- Remote sensing (52)
- Water Quality (52)
- Cybersecurity (47)
- Lake (46)
- Nitrogen (46)
- Lakes Lay Monitoring Program (45)
- Optimization (43)
- Climate (42)
- Artificial Intelligence (41)
- Environment (41)
- Blockchain (40)
- Soil Sampling (40)
- Classification (39)
- Computer vision (39)
- Publication
-
- Legacy Scout Tickets from Pure Oil Company (11044)
- Thin Sections (2130)
- IGC Proceedings (1993-2023) (1502)
- Theses and Dissertations (537)
- Research Collection School Of Computing and Information Systems (513)
-
- Journal of System Simulation (315)
- Faculty Publications (283)
- Electronic Theses and Dissertations (262)
- Chulalongkorn University Theses and Dissertations (Chula ETD) (215)
- Coal Geology & Exploration (204)
- Turkish Journal of Electrical Engineering and Computer Sciences (202)
- Silver Bow Creek/Butte Area Superfund Site (194)
- Turkish Journal of Mathematics (186)
- Turkish Journal of Chemistry (167)
- United States Department of Agriculture Wildlife Services: Staff Publications (136)
- Honors Theses (122)
- Dissertations (115)
- USF Tampa Graduate Theses and Dissertations (112)
- Departmental Technical Reports (CS) (109)
- Graduate Theses and Dissertations (108)
- School of Natural Resources: Faculty Publications (106)
- Publications and Research (99)
- Doctoral Dissertations (96)
- Research outputs 2014 to 2021 (93)
- C-Day Computing Showcase (87)
- Electronic Thesis and Dissertation Repository (86)
- All Works (83)
- Articles (82)
- Physics Faculty Publications (81)
- Module 10: Garden Ecology (78)
- Publication Type
Articles 2491 - 2520 of 27884
Full-Text Articles in Physical Sciences and Mathematics
Breeding For Resistance To Strike Leaf Blight (Scolecotrichum Graminis) Of Orchardgras In Argentina, A. Andrés, M. Ruiz Diaz, J. Anonne, B. S. Rosso
Breeding For Resistance To Strike Leaf Blight (Scolecotrichum Graminis) Of Orchardgras In Argentina, A. Andrés, M. Ruiz Diaz, J. Anonne, B. S. Rosso
IGC Proceedings (1993-2023)
A collection of orchardgrass (Dactylis glomerata) was screened under field conditions for resistance to strike leaf blight (SLB) caused by the fungus Scolecotrichum graminis. On the whole, thirty five entries from different countries were studied by sampling ten genotypes from each origin, clonally propagated and transplanted as spaced-plant trial in a randomized design with two replicates. Plants were periodically assessed during 1996 and 1997 by estimating disease severity (percentage of leaf affected). During 1997, disease severity data were used to calculate the area under disease progress curves (AUDPC) as a complementary attribute to screen for resistance to …
Mgrre_Pureoilscouttickets_Morrison, Frank_1_21127017670000, Mgrre
Mgrre_Pureoilscouttickets_Morrison, Frank_1_21127017670000, Mgrre
Legacy Scout Tickets from Pure Oil Company
No abstract provided.
The Sandhill Crane State: A Naturalist’S Guide To Nebraska, Paul Johnsgard
The Sandhill Crane State: A Naturalist’S Guide To Nebraska, Paul Johnsgard
Zea E-Books Collection
This book includes the locations, descriptions, and points of biological, historical, geological, or paleontological interest of nearly 350 sites in Nebraska, most of which are free to access. Its 53,000 words include accounts of 9 state historical parks, 8 state parks, 2 national forests, 2 national monuments, and 7 national wildlife refuges as well as 181 wildlife management areas, 56 waterfowl production areas, and 54 state recreation areas. It also includes 48 state and county maps, 18 drawings, 33 photographs, and nearly 200 literature citations.
doi: 10.32873/unl.dc.zea.1305
Embedded Charge Distributions In Electron Irradiated Polymers – Pulsed Electroacoustic Method Reproducibility And Calibration, Zachary Gibson, Jr Dennison, Ryan Hoffmann
Embedded Charge Distributions In Electron Irradiated Polymers – Pulsed Electroacoustic Method Reproducibility And Calibration, Zachary Gibson, Jr Dennison, Ryan Hoffmann
Physics Student Research
The pulsed electroacoustic (PEA) method has been used to measure the embedded charge distributions in electron irradiated polymers. The PEA method allows for non-destructive direct measurements of embedded charge distributions in dielectric materials. Samples of polyether-etherketone (PEEK) and polytetrafluoroethylene (PTFE) of 125 μm or 250 μm thickness were tested after irradiation with either a 50 keV or 80 keV electron beam. The reproducibility of the PEA method and the experimental conditions were studied by: (i) measuring each sample multiple times in a given mounting configuration, (ii) re-measuring each sample after repositioning them in the PEA test fixture, and (iii) measuring …
Inverse Properties Of A Class Of Seven-Diagonal (Near) Toeplitz Matrices, Bakytzhan Kurmanbek, Yogi Erlangga, Yerlan Amanbek
Inverse Properties Of A Class Of Seven-Diagonal (Near) Toeplitz Matrices, Bakytzhan Kurmanbek, Yogi Erlangga, Yerlan Amanbek
All Works
This paper presents the explicit inverse of a class of seven-diagonal (near) Toeplitz matrices, which arises in the numerical solutions of nonlinear fourth-order differential equation with a finite difference method. A non-recurrence explicit inverse formula is derived using the Sherman-Morrison formula. Related to the fixed-point iteration used to solve the differential equation, we show the positivity of the inverse matrix and construct an upper bound for the norms of the inverse matrix, which can be used to predict the convergence of the method.
The N-Dimensional Quadratic Heisenberg Algebra As A “Non–Commutative” Sl(2,C), Luigi Accardi, Andreas Boukas, Yun-Gang Lu
The N-Dimensional Quadratic Heisenberg Algebra As A “Non–Commutative” Sl(2,C), Luigi Accardi, Andreas Boukas, Yun-Gang Lu
Journal of Stochastic Analysis
No abstract provided.
High Polymorphism For Forage Production Of Lotus Corniculatus Sn Transformants, Sergio Arcioni, F. Paolocci, V. Turchetti, F. Damiani
High Polymorphism For Forage Production Of Lotus Corniculatus Sn Transformants, Sergio Arcioni, F. Paolocci, V. Turchetti, F. Damiani
IGC Proceedings (1993-2023)
Transgenic plants obtained from transformation of one individual of Lotus corniculatus with the maize gene Sn, a transactivator of anthocyanin pathway, were analysed for the expression of the transgene and for the accumulation of condensed tannins. A great variability was observed for these two traits. Some extreme individuals were clonally propagated and analysed for rooting ability and plant growth. Unexpectedly, a strong correlation between condensed tannin level, rooting ability and plant growth was observed. These results are discussed in order to explore new strategies to increase plant productivity in forage legumes.
Gastrointestinal Nematode Infections In Grazing Domestic Ruminants, M. Eysker
Gastrointestinal Nematode Infections In Grazing Domestic Ruminants, M. Eysker
IGC Proceedings (1993-2023)
World wide gastrointestinal nematode infections impair production of ruminants. Particularly in small ruminants control of these infections is seriously hampered by the development of resistance of the parasites against anthelmintic drugs. This implies that alternative control measures have to be implemented in order to maintain a sustainable ruminant industry. In this paper the various possibilities to achieve this are briefly discussed. The possibilities discussed include grazing management, vaccination, selective breeding, biological control, nutrition and the use of bioactive forages such as for instance plants containing condensed tannins. At the end it is concluded that combinations of these options should preferably …
Plant Secondary Compounds; Their Impact On Forage Nutritive Value And Upon Animal Production, T. N. Barry, D. M. Mcneill, W. C. Mcnabb
Plant Secondary Compounds; Their Impact On Forage Nutritive Value And Upon Animal Production, T. N. Barry, D. M. Mcneill, W. C. Mcnabb
IGC Proceedings (1993-2023)
Both the anti-nutritional and beneficial effects of secondary compounds in a range of temperate and tropical forages have been reviewed. Major secondary compounds in temperate and tropical forage plants occur in the phenolic fraction and include condensed and hydrolysable tannins, phenolic monomers and lignin. Condensed tannins (CT) bind to plant protein by pH-reversible hydrogen bonding. In temperate legume forages this reduces rumen protein degradation and can increase the absorption of essential amino acids (EAA) from the small intestine, with reactivity depending on CT concentration, molecular weight and chemical structure. Low concentrations of CT in Lotus corniculatus (20-40g/kg DM) increased EAA …
A Strategy For Detecting Natural Anthelmintic Constituents Of The Grassland Species Plantago Lanceolata, D. L. Gustine, M. A. Sanderson, J. Getzie, S. Donner, R. Gueldner, N. Jennings
A Strategy For Detecting Natural Anthelmintic Constituents Of The Grassland Species Plantago Lanceolata, D. L. Gustine, M. A. Sanderson, J. Getzie, S. Donner, R. Gueldner, N. Jennings
IGC Proceedings (1993-2023)
A strategy to detect anthelmintic constituents in plantain (Plantago lanceolata) using a bioassay-driven purification approach was tested. Plantain consumed by cattle may control or reduce internal parasite titers, possibly due to the iridoid glucoside aucubin. Lyophilized, ground leaves of wild P. lanceolata were extracted with 95 % ethanol or boiling water containing calcium carbonate. Partially purified extracts (0 to 250 mg ml-1), 5 μg ml-1 of the anthelmintic levamisole, or 5 mg ml-1 of aucubin were tested with sheathed bovine parasites (Ostertagia ostertagi). The percent moving worms was unchanged for water controls …
The Fierce Green Fire: Vol. 12 Issue 3, Wofford College. Department Of Environmental Studies
The Fierce Green Fire: Vol. 12 Issue 3, Wofford College. Department Of Environmental Studies
The Fierce Green Fire
No abstract provided.
Mgrre_Pureoilscouttickets_Doolittle, A._2_21127017440000, Mgrre
Mgrre_Pureoilscouttickets_Doolittle, A._2_21127017440000, Mgrre
Legacy Scout Tickets from Pure Oil Company
No abstract provided.
New Approach For Assigning Mean Oxidation Number Of Carbons To Organonitrogen And Organosulfur Compounds, Pong Kau Yuen, Cheng Man Diana Lau
New Approach For Assigning Mean Oxidation Number Of Carbons To Organonitrogen And Organosulfur Compounds, Pong Kau Yuen, Cheng Man Diana Lau
Faculty Publications
Organonitrogen and organosulfur compounds are abundant in the natural environment. To understand the biological redox pathways properly, it is important for learners to be able to count the oxidation number of organic carbons. However, the process of counting is not always easy. In addition, organonitrogen and organosulfur molecules are seldom studied. To compensate these problems, this paper explores the bonddividing method, which can effectively determine the mean oxidation number of carbons of organonitrogen and organosulfur molecules. This method uses the cleavage of carbon-sulfur and carbon-nitrogen bonds to obtain the organic and inorganic fragments. The mean oxidation numbers of carbon atoms, …
Effects Of Progesterone Concentrations And Follicular Wave During Growth Of The Ovulatory Follicle On Conceptus And Endometrial Transcriptome In Dairy Cows, R S. Bisinotto, E S. Ribeiro, L F. Greco, Daniel Taylor-Rodríguez, A D. Ealy, H Ayres, F S. Lima, N Martinez, W W. Thatcher, J E P Santos
Effects Of Progesterone Concentrations And Follicular Wave During Growth Of The Ovulatory Follicle On Conceptus And Endometrial Transcriptome In Dairy Cows, R S. Bisinotto, E S. Ribeiro, L F. Greco, Daniel Taylor-Rodríguez, A D. Ealy, H Ayres, F S. Lima, N Martinez, W W. Thatcher, J E P Santos
Mathematics and Statistics Faculty Publications and Presentations
Objectives were to evaluate the effects of follicular wave and progesterone concentration on growth of the ovulatory follicle, conceptus elongation, uterine IFN-τ concentration, and transcriptome of conceptus and endometrium of pregnant cows on d 17 of gestation. Nonlactating nonpregnant Holstein cows were assigned randomly to one of 3 treatments: ovulation of a first-wave follicle (FW, n = 15); ovulation of a first-wave follicle and progesterone supplementation (FWP4, n = 12); and ovulation of a second-wave follicle (SW, n = 19). Ovulation of a first- or second-wave follicle was achieved by initiating the Ovsynch protocol (d -9 GnRH, d -2 and …
Conformer-Specific Photochemistry Imaged In Real Space And Time, E. G. Champenois, D. M. Sanchez, J. Yang, J. P. Figueira Nunes, A. Attar, Martin Centurion, R. Forbes, M. Gühr, K. Hegazy, F. Ji, S. K. Saha, Y. Liu, M. F. Lin, D. Luo, B. Moore, X. Shen, M. R. Ware, Xijie Wang, T. J. Martínez, Thomas J. A. Wolf
Conformer-Specific Photochemistry Imaged In Real Space And Time, E. G. Champenois, D. M. Sanchez, J. Yang, J. P. Figueira Nunes, A. Attar, Martin Centurion, R. Forbes, M. Gühr, K. Hegazy, F. Ji, S. K. Saha, Y. Liu, M. F. Lin, D. Luo, B. Moore, X. Shen, M. R. Ware, Xijie Wang, T. J. Martínez, Thomas J. A. Wolf
Martin Centurion Publications
Conformational isomers (conformers) of molecules play a decisive role in biology and organic chemistry. However, experimental methods for investigating chemical reaction dynamics are typically not conformersensitive. We report on a gas-phase megaelectronvolt ultrafast electron diffraction investigation of a-phellandrene undergoing an electrocyclic ring-opening reaction. We directly imaged the evolution of a specific set of a-phellandrene conformers into the product isomer predicted by the Woodward-Hoffmann rules in real space and time. Our experimental results are in quantitative agreement with nonadiabatic quantum molecular dynamics simulations, which provide considerable detail of how conformation influences the time scale and quantum efficiency of photoinduced ring-opening reactions. …
On The Extension Of Exponentiated Pareto Distribution, Amal S. Hassan, Saeed Elsayed Hemeda, Said G. Nassr
On The Extension Of Exponentiated Pareto Distribution, Amal S. Hassan, Saeed Elsayed Hemeda, Said G. Nassr
Journal of Modern Applied Statistical Methods
In this study, an extended exponentiated Pareto distribution is proposed. Some statistical properties are derived. We consider maximum likelihood, least squares, weighted least squares and Bayesian estimators. A simulation study is implemented for investigating the accuracy of different estimators. An application of the proposed distribution to a real data is presented.
Atmospheric Tomography Using The Nordic Meteor Radar Cluster And Chilean Observation Network De Meteor Radars: Network Details And 3d-Var Retrieval, Gunter Stober, Alan Z. Liu, Zishun Qiao, Alexander Kozlovsky, Masaki Tsutsumi, Chris Hall, Satonori Nozawa, Mark Lester, Evgenia Belova, Johan Kero, Patrick J. Espy, Robert E. Hibbins, Nicholas Mitchell
Atmospheric Tomography Using The Nordic Meteor Radar Cluster And Chilean Observation Network De Meteor Radars: Network Details And 3d-Var Retrieval, Gunter Stober, Alan Z. Liu, Zishun Qiao, Alexander Kozlovsky, Masaki Tsutsumi, Chris Hall, Satonori Nozawa, Mark Lester, Evgenia Belova, Johan Kero, Patrick J. Espy, Robert E. Hibbins, Nicholas Mitchell
Publications
Ground-based remote sensing of atmospheric parameters is often limited to single station observations by vertical profiles at a certain geographic location. This is a limiting factor for investigating gravity wave dynamics as the spatial information is often missing, e.g., horizontal wavelength, propagation direction or intrinsic frequency. In this study, we present a new retrieval algorithm for multistatic meteor radar networks to obtain tomographic 3-D wind fields within a pre-defined domain area. The algorithm is part of the Agile Software for Gravity wAve Regional Dynamics (ASGARD) and called 3D-Var, and based on the optimal estimation technique and Bayesian statistics. The performance …
Butte Priority Soils Operable Unit (Bpsou) Final Reclaimed Areas Maintenance And Monitoring (M&M) Plan And Butte Reclamation Evaluation System (Bres) Field Manual, Mike Mcanulty, Eric Hassler
Butte Priority Soils Operable Unit (Bpsou) Final Reclaimed Areas Maintenance And Monitoring (M&M) Plan And Butte Reclamation Evaluation System (Bres) Field Manual, Mike Mcanulty, Eric Hassler
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Silver Bow Creek/Butte Area Npl Site Butte Priority Soils Operable Unit, Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Npl Site Butte Priority Soils Operable Unit, Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Butte Priority Soils Operable Unit (Bpsou) Final Reclaimed Areas Maintenance And Monitoring (M&M) Plan And Butte Reclamation Evaluation System (Bres) Field Manual, Mike Mcanulty, Eric Hassler
Butte Priority Soils Operable Unit (Bpsou) Final Reclaimed Areas Maintenance And Monitoring (M&M) Plan And Butte Reclamation Evaluation System (Bres) Field Manual, Mike Mcanulty, Eric Hassler
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Butte Priority Soils Operable Unit (Bpsou) Solid Media Management Program Plan, Mike Mcanulty
Butte Priority Soils Operable Unit (Bpsou) Solid Media Management Program Plan, Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Silver Bow Creek/Butte Area Npl Site Butte Priority Soils Operable Unit, Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Npl Site Butte Priority Soils Operable Unit, Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
All-Sky Search For Continuous Gravitational Waves From Isolated Neutron Stars In The Early O3 Ligo Data, Ligo Scientific Collaboration, Virgo Collaboration, Kagra Collaboration, Tiffany Z. Summerscales
All-Sky Search For Continuous Gravitational Waves From Isolated Neutron Stars In The Early O3 Ligo Data, Ligo Scientific Collaboration, Virgo Collaboration, Kagra Collaboration, Tiffany Z. Summerscales
Faculty Publications
We report on an all-sky search for continuous gravitational waves in the frequency band 20–2000 Hz and with a frequency time derivative in the range of [−1.0,+0.1]×10−8 Hz/s. Such a signal could be produced by a nearby, spinning and slightly nonaxisymmetric isolated neutron star in our Galaxy. This search uses the LIGO data from the first six months of Advanced LIGO’s and Advanced Virgo’s third observational run, O3. No periodic gravitational wave signals are observed, and 95% confidence-level (C.L.) frequentist upper limits are placed on their strengths. The lowest upper limits on worst-case (linearly polarized) strain amplitude h0 are ∼1.7×10−25 …
The Chromatic Quasisymmetric Class Function Of A Digraph, Jacob A. White
The Chromatic Quasisymmetric Class Function Of A Digraph, Jacob A. White
School of Mathematical and Statistical Sciences Faculty Publications and Presentations
We introduce a quasisymmetric class function associated with a group acting on a double poset or on a directed graph. The latter is a generalization of the chromatic quasisymmetric function of a digraph introduced by Ellzey, while the former is a generalization of a quasisymmetric function introduced by Grinberg. We prove representation-theoretic analogues of classical and recent results, including F-positivity, and combinatorial reciprocity theorems. We deduce results for orbital quasisymmetric functions, and study a generalization of the notion of strongly flawless sequences.
All-Sky Search For Continuous Gravitational Waves From Isolated Neutron Stars In The Early O3 Ligo Data, R. Abbott, T. D. Abbott, S. Abraham, Teviet Creighton, Mario C. Diaz, Volker Quetschke, Karla E. Ramirez, Wen Hui Wang
All-Sky Search For Continuous Gravitational Waves From Isolated Neutron Stars In The Early O3 Ligo Data, R. Abbott, T. D. Abbott, S. Abraham, Teviet Creighton, Mario C. Diaz, Volker Quetschke, Karla E. Ramirez, Wen Hui Wang
Physics and Astronomy Faculty Publications and Presentations
We report on an all-sky search for continuous gravitational waves in the frequency band 20–2000 Hz and with a frequency time derivative in the range of [−1.0,+0.1]×10−8 Hz/s. Such a signal could be produced by a nearby, spinning and slightly nonaxisymmetric isolated neutron star in our Galaxy. This search uses the LIGO data from the first six months of Advanced LIGO’s and Advanced Virgo’s third observational run, O3. No periodic gravitational wave signals are observed, and 95% confidence-level (C.L.) frequentist upper limits are placed on their strengths. The lowest upper limits on worst-case (linearly polarized) strain amplitude h0 are ∼1.7×10−25 …
Tree Competition Reduces Cattle Growth Rates In Eucalypt Woodlands Of Queensland, T. J. Hall, J. R. Douglas
Tree Competition Reduces Cattle Growth Rates In Eucalypt Woodlands Of Queensland, T. J. Hall, J. R. Douglas
IGC Proceedings (1993-2023)
The wiregrass/bluegrass (Aristida/Bothriochloa) native pasture community in Eucalypt woodlands is a major cattle producing resource in Queensland. The effects of poplar box tree (Eucalyptus populnea) competition (at 5 m2/ha tree basal area) and grazing pressure on pastures and on growth of Brahman-cross steers were measured in a grazing experiment. Treatments were 2 tree competition levels (live trees or clearing) by 3 grazing pressures (low - 25%, medium - 50% and high - 75% utilisation of annual pasture growth). Pasture yield and pasture foliage cover increased for 3 years from the reduction in tree competition …
Perloline, The Forgotten Plant Alkaloid, L. P. Bush
Perloline, The Forgotten Plant Alkaloid, L. P. Bush
IGC Proceedings (1993-2023)
Perloline, a biologically active plant alkaloid, accumulated in vegetative tissue of tall fescue during the summer months. Perloline content increased with increased available nitrogen and light. Total perloline accumulation was greatest with NO3-N fertilizer, but greatest perloline content per unit of dry wt was measured with NH4-N. In mature plants greatest perloline accumulation occurred in the leaves and immature inflorescences, but was not detected in the seed. Leaves of meadow fescue contained the greatest amounts of perloline, tall fescue was intermediate and giant fescue, and ryegrasses and yellow foxtail had low amounts of the alkaloid. Tryptophan …
Bloat In Ruminants: The Cell Rupture Hypothesis, B. P. Berg, T. A. Mcallister, K.-J. Cheng
Bloat In Ruminants: The Cell Rupture Hypothesis, B. P. Berg, T. A. Mcallister, K.-J. Cheng
IGC Proceedings (1993-2023)
An alfalfa (Medicago sativa L.) cultivar with a low initial rate of digestion (LIRD), AC Grazeland B, was developed to test the hypothesis that the rate of cell rupture was a cause of frothy bloat in cattle or sheep. The amount of cell wall increases and digestibility declines as plants mature. Thus the cell rupture theory also predicts that the bloat potential of alfalfa is related to maturity. This study compared the digestibility of cell walls (NDF) in LIRD cultivars with that of a standard, Beaver, in relation to maturity and bloat incidence. Fresh alfalfa was fed to wethers …
Effect Of Storage Time And Temperature On Recovery Of Synergistes Jonesii From Rumen Fluid And Feces, W. M. Andrew, M. J. Williams, M. J. Allison, C. C. Chase Jr., C. G. Chambliss, R. S. Kalmbacher, W. E. Kunkle
Effect Of Storage Time And Temperature On Recovery Of Synergistes Jonesii From Rumen Fluid And Feces, W. M. Andrew, M. J. Williams, M. J. Allison, C. C. Chase Jr., C. G. Chambliss, R. S. Kalmbacher, W. E. Kunkle
IGC Proceedings (1993-2023)
Synergistes jonesii is a rumen bacterium that degrades 3,4-dihydroxypyridine (3,4 DHP), the toxic breakdown product of mimosine in leucaena (Leucaena leucocephala). Fecal culture is the most practical way to determine S. jonesii presence in zoological ruminants, particularly if feces can be collected from night penning facilities. Fresh rumen fluid and fecal or fecal slurry (sheep [Ovis spp.] only, 1:4 wt to vol. feces and culture media) from cattle (Bos spp.) and sheep, known to be colonized by S. jonesii, were subjected various storage times (0, 6, 12, and 24 h) and temperatures (5, 23, and …
Evaluating Otter Reintroduction Outcomes Using Genetic Spatial Capture-Recapture Modified For Dendritic Networks, Sean M. Murphy, Jennifer R. Adams, Lisette P. Waits, John J. Cox
Evaluating Otter Reintroduction Outcomes Using Genetic Spatial Capture-Recapture Modified For Dendritic Networks, Sean M. Murphy, Jennifer R. Adams, Lisette P. Waits, John J. Cox
Forestry and Natural Resources Faculty Publications
Monitoring the demographics and genetics of reintroduced populations is critical to evaluating reintroduction success, but species ecology and the landscapes that they inhabit often present challenges for accurate assessments. If suitable habitats are restricted to hierarchical dendritic networks, such as river systems, animal movements are typically constrained and may violate assumptions of methods commonly used to estimate demographic parameters. Using genetic detection data collected via fecal sampling at latrines, we demonstrate applicability of the spatial capture–recapture (SCR) network distance function for estimating the size and density of a recently reintroduced North American river otter (Lontra canadensis) population in …