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Articles 31681 - 31710 of 294440

Full-Text Articles in Physical Sciences and Mathematics

Jwst Lensed Quasar Dark Matter Survey – I. Description And First Results, A. M. Nierenberg, R. E. Keeley, D. Sluse, D. Gilman, S. Birrer, T. Treu, K. N. Abazajian, T. Anguita, A. J. Benson, Vardha N. Bennert Feb 2024

Jwst Lensed Quasar Dark Matter Survey – I. Description And First Results, A. M. Nierenberg, R. E. Keeley, D. Sluse, D. Gilman, S. Birrer, T. Treu, K. N. Abazajian, T. Anguita, A. J. Benson, Vardha N. Bennert

Physics

The flux ratios of gravitationally lensed quasars provide a powerful probe of the nature of dark matter. Importantly, these ratios are sensitive to small-scale structure, irrespective of the presence of baryons. This sensitivity may allow us to study the halo mass function even below the scales where galaxies form observable stars. For accurate measurements, it is essential that the quasar’s light is emitted from a physical region of the quasar with an angular scale of milliarcseconds or larger; this minimizes microlensing effects by stars within the deflector. The warm dust region of quasars fits this criterion, as it has parsec-size …

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Functional Data Learning Using Convolutional Neural Networks, Jose Galarza, Tamer Oraby Feb 2024

Functional Data Learning Using Convolutional Neural Networks, Jose Galarza, Tamer Oraby

School of Mathematical & Statistical Sciences Faculty Publications

In this paper, we show how convolutional neural networks (CNNs) can be used in regression and classification learning problems for noisy and non-noisy functional data (FD). The main idea is to transform the FD into a 28 by 28 image. We use a specific but typical architecture of a CNN to perform all the regression exercises of parameter estimation and functional form classification. First, we use some functional case studies of FD with and without random noise to showcase the strength of the new method. In particular, we use it to estimate exponential growth and decay rates, the bandwidths of …

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Mortality Outcomes In A Large Population With And Without Covert Cerebrovascular Disease, Ellen M Vickery, Lester Y Leung, Patrick H Luetmer, David F Kallmes, Sunyang Fu, Chengyi Zheng, Hongfang Liu, David M Kent Feb 2024

Mortality Outcomes In A Large Population With And Without Covert Cerebrovascular Disease, Ellen M Vickery, Lester Y Leung, Patrick H Luetmer, David F Kallmes, Sunyang Fu, Chengyi Zheng, Hongfang Liu, David M Kent

Faculty, Staff and Student Publications

Covert cerebrovascular disease (CCD) is frequently reported on neuroimaging and associates with increased dementia and stroke risk. We aimed to determine how incidentally-discovered CCD during clinical neuroimaging in a large population associates with mortality. We screened CT and MRI reports of adults aged ≥50 in the Kaiser Permanente Southern California health system who underwent neuroimaging for a non-stroke clinical indication from 2009-2019. Natural language processing identified incidental covert brain infarcts (CBI) and/or white matter hyperintensities (WMH), grading WMH as mild/moderate/severe. Models adjusted for age, sex, ethnicity, multimorbidity, vascular risks, depression, exercise, and imaging modality. Of n=241,028, the mean age was …

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Cancergpt For Few Shot Drug Pair Synergy Prediction Using Large Pretrained Language Models, Xiaoqian Jiang, Ying Ding, Yejin Kim Feb 2024

Cancergpt For Few Shot Drug Pair Synergy Prediction Using Large Pretrained Language Models, Xiaoqian Jiang, Ying Ding, Yejin Kim

Faculty, Staff and Student Publications

Large language models (LLMs) have been shown to have significant potential in few-shot learning across various fields, even with minimal training data. However, their ability to generalize to unseen tasks in more complex fields, such as biology and medicine has yet to be fully evaluated. LLMs can offer a promising alternative approach for biological inference, particularly in cases where structured data and sample size are limited, by extracting prior knowledge from text corpora. Here we report our proposed few-shot learning approach, which uses LLMs to predict the synergy of drug pairs in rare tissues that lack structured data and features. …

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Using A Two-Way Engagement Community- And Family-Centered Pedagogy To Prepare Pre-Service Mathematics Teachers In A Hispanic-Serving Institution, Olga Ramirez, Mayra Ortiz Galarza, Luis M. Fernandez Feb 2024

Using A Two-Way Engagement Community- And Family-Centered Pedagogy To Prepare Pre-Service Mathematics Teachers In A Hispanic-Serving Institution, Olga Ramirez, Mayra Ortiz Galarza, Luis M. Fernandez

School of Mathematical & Statistical Sciences Faculty Publications

Research on effective methods to prepare pre-service teachers (PSTs) in teaching mathematics to K-12 Latin* students has been gaining significant momentum. These efforts have focused, in part, on promoting pedagogical practices that recognize and incorporate the culture and language that K-12 Latin* students and their communities share. As teacher educators, we argue that if we are to further prepare PSTs to serve the needs of such increasingly diversifying K-12 student population, the same pedagogical focus on the learner’s cultural wealth should also be applied to the preparation of PSTs themselves, especially among Latin* PSTs in Hispanic Serving Institutions (HSI) like …

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Analysis Of Legacy Gravity Data Reveals Sediment-Filled Troughs Buried Under Flathead Valley, Montana, Usa, Ali Gebril, Mohamed A. Khalil, Robert Matthew Joeckel, James Rose Feb 2024

Analysis Of Legacy Gravity Data Reveals Sediment-Filled Troughs Buried Under Flathead Valley, Montana, Usa, Ali Gebril, Mohamed A. Khalil, Robert Matthew Joeckel, James Rose

Conservation and Survey Division: Faculty and Staff Publications

Shallow, dominantly silt- and clay-filled erosional troughs in Quaternary sediments under the Flathead Valley (northwestern Montana, USA) are very likely to be hydraulic barriers limiting the horizontal flow of groundwater. Accurately mapping them is important because of increasing demand for groundwater.We used a legacy Bouguer gravity map measured in 1968. The directional derivatives of the map are computed, and the map was enhanced by implementing edge detection tools.We produced generalized derivative, maximum horizontal gradient, total gradient and tilt gradient maps through two-dimensional Fourier transform analysis. These maps were remarkably successful in locating buried troughs in the northern and northwestern parts …

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Development Of An Empirical Ground-Motion Model For Post-Mining Induced Seismicity Near Gardanne, France, Pierre Gehl, Pascal Dominique, Hideo Aochi, Mickael Delatre, Jannes Kinscher, Isabelle Contrucci Feb 2024

Development Of An Empirical Ground-Motion Model For Post-Mining Induced Seismicity Near Gardanne, France, Pierre Gehl, Pascal Dominique, Hideo Aochi, Mickael Delatre, Jannes Kinscher, Isabelle Contrucci

Journal of Sustainable Mining

Since the closure of mining activities in 2003, the coal basin of Gardanne in South-East France has experienced thousands of small-magnitude earthquake events, mostly triggered by the flooding of mine workings. Some of these events have been powerful enough to be strongly felt by the population, generating nuisance and concern about potential damage to buildings. The aim of this study is to improve the characterisation of the level of ground motion at the surface, by developing a ground-motion model for post-mining induced seismicity, based on several years of recorded data. A Bayesian-based method is applied to the data in order …

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Swarm Intelligence Methods For Extreme Mass Ratio Inspiral Search: First Application Of Particle Swarm Optimization, Xiao-Bo Zou, Soumya D. Mohanty, Hong-Gang Luo, Yu-Xiao Liu Feb 2024

Swarm Intelligence Methods For Extreme Mass Ratio Inspiral Search: First Application Of Particle Swarm Optimization, Xiao-Bo Zou, Soumya D. Mohanty, Hong-Gang Luo, Yu-Xiao Liu

Physics & Astronomy Faculty Publications

Swarm intelligence (SI) methods are nature-inspired metaheuristics for global optimization that exploit a coordinated stochastic search strategy by a group of agents. Particle swarm optimization (PSO) is an established SI method that has been applied successfully to the optimization of rugged high-dimensional likelihood functions, a problem that represents the main bottleneck across a variety of gravitational wave (GW) data analysis challenges. We present results from the first application of PSO to one of the most difficult of these challenges, namely the search for the Extreme Mass Ratio Inspiral (EMRI) in data from future spaceborne GW detectors such as LISA, Taiji, …

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Pseudo-Differential Operators On The Circle, Bernoulli Polynomials, Roger Gay, Ahmed Sebbar Feb 2024

Pseudo-Differential Operators On The Circle, Bernoulli Polynomials, Roger Gay, Ahmed Sebbar

Mathematics, Physics, and Computer Science Faculty Articles and Research

We show how the classical polylogarithm function Lis (z) and its relatives, the Hurwitz zeta function and the Lerch function are all of a spectral nature, and can explain many properties of the complex powers of the Laplacian on the circle and of the distribution (x +i0)s .We also make a relation with a result of Keiper [Fractional Calculus and its relationship to Riemann’s zeta function, Master of Science, Ohio State University, Mathematics (1975)].

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Improving The Proof Of The Born Rule Using A Physical Requirement On The Dynamics Of Quantum Particles, Yakir Aharonov, Tomer Shushi Feb 2024

Improving The Proof Of The Born Rule Using A Physical Requirement On The Dynamics Of Quantum Particles, Yakir Aharonov, Tomer Shushi

Mathematics, Physics, and Computer Science Faculty Articles and Research

We propose a complete proof of the Born rule using an additional postulate stating that for a short enough time Δt between two measurements, a property of a particle will keep its values fixed. This dynamical postulate allows us to produce the Born rule in its explicit form by improving the result given in [1]. While the proposed postulate is still not part of the quantum mechanics postulates, every experiment obeys it, and it cannot be deduced using the standard postulates of quantum mechanics.

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Spacetime Geometry Of Acoustics And Electromagnetism, Lucas Burns, Tatsuya Daniel, Stephon Alexander, Justin Dressel Feb 2024

Spacetime Geometry Of Acoustics And Electromagnetism, Lucas Burns, Tatsuya Daniel, Stephon Alexander, Justin Dressel

Mathematics, Physics, and Computer Science Faculty Articles and Research

Both acoustics and electromagnetism represent measurable fields in terms of dynamical potential fields. Electromagnetic force-fields form a spacetime bivector that is represented by a dynamical energy–momentum 4-vector potential field. Acoustic pressure and velocity fields form an energy–momentum density 4-vector field that is represented by a dynamical action scalar potential field. Surprisingly, standard field theory analyses of spin angular momentum based on these traditional potential representations contradict recent experiments, which motivates a careful reassessment of both theories. We analyze extensions of both theories that use the full geometric structure of spacetime to respect essential symmetries enforced by vacuum wave propagation. The …

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Curbing Crop Farmers And Herders Clashes In Nigeria: The Ranching Option, T. T. Akpensuen, M. B. Foreman Feb 2024

Curbing Crop Farmers And Herders Clashes In Nigeria: The Ranching Option, T. T. Akpensuen, M. B. Foreman

IGC Proceedings (1977-2023)

Nigeria is a West African country with a huge population and over 70% of the population are peasant and subsistence farmers scattered in rural areas. Due to a decrease in arable and grazing lands, there are clashes between crop farmers and herders which have increased significantly in the last two decades. Some of the causes of the clashes include the destruction of crops by cattle, contamination of drinking water sources, sexual harassment of women by herders, animal rustling and killings, impunity and ineffective governance security agencies, tremendous increase in population, urbanization, desertification, industrialisation, insurgency, banditry, ethnic and religious inclination, effects …

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Public Policies For The Development Of A Sustainable, Forage-Based Cattle Sector In Colombia, Argentina, And Costa Rica: A Comparative Analysis, S. Burkart, M. Diaz, Moreno Lerma Feb 2024

Public Policies For The Development Of A Sustainable, Forage-Based Cattle Sector In Colombia, Argentina, And Costa Rica: A Comparative Analysis, S. Burkart, M. Diaz, Moreno Lerma

IGC Proceedings (1977-2023)

Projected increases in global food demand highlight the importance of Latin America as one of the major future food suppliers, particularly regarding animal-source foods such as beef or milk. Despite the importance of the cattle sector for the region, its negative environmental impacts are numerous and the shift towards sustainability is perceived as slow and uncoordinated. This study aims to identify achievements and difficulties in the implementation of public policies for a sustainable cattle sector in Colombia, Argentina, and Costa Rica, for which policies focused on the use of silvo-pastoral systems and forage-based solutions are prioritized. Based on the review …

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Grasslands, Rangelands, Pastoralists – What Do We Mean?, D. M. Kelly, Ann Waters-Bayer, K. L. Johnson, Maryam Niamir-Fuller, Chris Magero, Tungalag Ulambayer Feb 2024

Grasslands, Rangelands, Pastoralists – What Do We Mean?, D. M. Kelly, Ann Waters-Bayer, K. L. Johnson, Maryam Niamir-Fuller, Chris Magero, Tungalag Ulambayer

IGC Proceedings (1977-2023)

The terms grasslands and rangelands are often confused, but the terms used to describe the people who live and manage these areas are even more confusing. The myriad of words used about these people includes: pastoralists, farmers, ranchers, herders, transhumants, indigenous peoples, nomads, graziers, gauchos. The terms used vary across the world, and meanings vary across time and space. One definition of pastoralists is “livestock-keepers who specialise in taking advantage of variability, managing grazing itineraries at a variety of scales so that livestock feed better than without a herder” (Krätli 2019). The United Nations Decade of Family Farming defines farmers …

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Barriers/Drivers Of Diverse Perennial Systems: Policy Recommendations, M. L. Krome, A. S. Finan, J. Obudzinski, N. Serrano Feb 2024

Barriers/Drivers Of Diverse Perennial Systems: Policy Recommendations, M. L. Krome, A. S. Finan, J. Obudzinski, N. Serrano

IGC Proceedings (1977-2023)

Despite growing documentation of perennial- and grass-based systems’ importance in addressing many ecological, infrastructural, farmer profitability, and climate concerns, these systems do not predominate on most United States farm and ranch lands. To better understand what impedes their wider adoption, we undertook four focus groups of diverse current and potential farmers using perennial systems. We were especially interested in how these farmers access, or don’t, insurance, credit, and federal programs, identifying patterns among farmers embracing more sustainable practices. Our virtual focus groups comprised 16 farmers in ten states, transecting climate zones and representing both rural and urban production systems and …

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A New Soil Erosion Model For Alpine Meadow In The Source Park Of The Yellow River, Qinghai-Tibet Plateau, China, Huilong Lin, Rong Tang Feb 2024

A New Soil Erosion Model For Alpine Meadow In The Source Park Of The Yellow River, Qinghai-Tibet Plateau, China, Huilong Lin, Rong Tang

IGC Proceedings (1977-2023)

The source park of the Yellow River (SPYR), as a vital ecological shelter, is suffering different degrees of degradation and desertification, resulting in soil erosion in recent decades. It is urgent to find a soil erosion model suitable for the SPYR to grasp the amount and spatial distribution pattern of soil erosion, and to provide data support for soil erosion zoning and grading management. Base on largescale systematic sampling, 521 measured soil 137Cs data and environmental variables affecting soil erosion were used to verify the applicability of the Revised Universal Soil Loss Equation (RUSLE) and the Revised Wind Erosion Equation …

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Applying The Concepts Of Animal Husbandry To Human Health, John Madany Feb 2024

Applying The Concepts Of Animal Husbandry To Human Health, John Madany

IGC Proceedings (1977-2023)

Instead of a new paradigm, we need to modify an old paradigm. We must focus on restoring soil health and reviving human health. Ruminants can be used to heal the land and the people. Pastoralists, by managing ruminants, can preserve their own health while promoting soil health.

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Challenges Of Grassland Policies Implementation In Kenya And The Sustainable Development Goals, N. Daari Feb 2024

Challenges Of Grassland Policies Implementation In Kenya And The Sustainable Development Goals, N. Daari

IGC Proceedings (1977-2023)

Since independence, Kenya has found herself at the crossroads caused by economic recession, criminality, corruption and ineptitude leadership that has led to persistent household extreme poverty. It is time now to search for solutions to address the challenges facing sustainable livelihood development in Kenya. This study, therefore examines the challenges of grasslands related policies and their implementation in Kenya and the Sustainable Development Goals (SDGs). A review study of the literature on grasslands and rangelands related policies and laws, SDGs frameworks, government and academic literature was carried out. The study results show that; Kenya has faced challenges of grasslands policies …

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Below Ground Benefits Of Cactus Opuntia Stricta Under Rangeland Conditions In Laikipia, Kenya, K. T. Oduor, Jose C. B. Dubeux, W. O. Owino, M. Ruiz-Moreno, L. M. D. Queiroz, I. L. Bretas Feb 2024

Below Ground Benefits Of Cactus Opuntia Stricta Under Rangeland Conditions In Laikipia, Kenya, K. T. Oduor, Jose C. B. Dubeux, W. O. Owino, M. Ruiz-Moreno, L. M. D. Queiroz, I. L. Bretas

IGC Proceedings (1977-2023)

Cactus Opuntia stricta primarily invades arid and semi-arid lands (ASALs), which form more than 80% of Kenya’s landmass. The ability of the plant to tolerate poor soils and accumulate biomass under low precipitation has resulted in studies into its potential use by pastoral communities for biofuel and livestock feed. However, few studies have assessed the below-ground benefits associated with cactus under rangeland conditions. In this study, we evaluated the root contributions of the invasives cactus Opuntia stricta under rangeland conditions in Laikipia, Kenya. The experiment was laid out in a randomized complete block design with ten (10) replicates, each measuring …

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Applying The Transdisciplinary Adaptive Systemic Approach To Securing The Long-Term Future Of Grassland Ecosystems, C. G. Palmer, Z. W. Tessema, A. Bantider, B. Gusha, J. Tanner Feb 2024

Applying The Transdisciplinary Adaptive Systemic Approach To Securing The Long-Term Future Of Grassland Ecosystems, C. G. Palmer, Z. W. Tessema, A. Bantider, B. Gusha, J. Tanner

IGC Proceedings (1977-2023)

Contemporary grasslands all exist as complex adaptive systems, specifically complex social-ecological systems – whether these are in protected areas or are part of private or communal agricultural landscapes. These systems are subject to the current planetary condition that includes rapidly growing human populations and demand for natural resources, the widespread use of pollutants, and climate change consequences. All complex adaptive systems have characteristics in common - they comprise multiple elements, which interact, and the multiple interactions cause intersecting feedback loops. As a result, a current system condition reflects its history, future condition is difficult to predict, and interventions have unpredictable …

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Collaborative Management Of Common Pasture Resources: Institutional Concerns On Sustainable Pasture Use In Mongolia, Nyamdorj Doljinsuren, Tserendash Sainkhuu, Ariunbold Batkhuu Feb 2024

Collaborative Management Of Common Pasture Resources: Institutional Concerns On Sustainable Pasture Use In Mongolia, Nyamdorj Doljinsuren, Tserendash Sainkhuu, Ariunbold Batkhuu

IGC Proceedings (1977-2023)

Mongolia is a landlocked country which is elevated on average to 1,580 m above sea level with a range of 532 m (Khukh Nuur Lake depression) and 4,374 m (Khuiten mountain peak, Mongolian Altai range), in Asia. Historically, animal husbandry was dominantly widespread in the country. Today, 73% of the country's territory accounts for agriculture, where 31.6% of the national population belong. Agriculture contributes 13% of the gross domestic production of the country after mining and industry and construction sectors (The Statistical Yearbook 2021). Animal husbandry produces 96% of gross agriculture product, occupying 70% of the country's territory as pasture …

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Saving Rangelands From Pastoralists? Understanding The Long-Term Socio-Ecological Consequences Of The Current Rangeland Conservation Model In The Indian Himalaya, Rashmi Singh Feb 2024

Saving Rangelands From Pastoralists? Understanding The Long-Term Socio-Ecological Consequences Of The Current Rangeland Conservation Model In The Indian Himalaya, Rashmi Singh

IGC Proceedings (1977-2023)

Following the mainstream narrative of biodiversity conservation, state-led policies of pastoralist removal from protected areas have been a common practice across parts of Asia and Africa. In the Himalayan region, restrictive access and removal of pastoralist communities from protected areas have been assumed to be the best remedy for rangeland conservation. But does this practice translate into any benefits for conservation? This paper critiques the current conservation model adopted in the Indian Himalayas. I argue that this model simply recreates a landscape favouring the state’s interests, produces exclusions, and may also negatively affect both society and ecology. I build on …

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The Impacts Of Collective Action In Common-Pool Resources ——Evidence From The Field Of Grassland Use, Wang Jizhe, Liu Min, Nie Zihan Feb 2024

The Impacts Of Collective Action In Common-Pool Resources ——Evidence From The Field Of Grassland Use, Wang Jizhe, Liu Min, Nie Zihan

IGC Proceedings (1977-2023)

The deterioration of common-pool resources is a serious issue faced by over the world now. How to manage public resources sustainably is extremely urgent. Collective action plays an important role in the sustainable management of common-pool resources. It creates a common goal that makes resource users not only concern their individual interests, but also the collective interests, in order to avoid the common-pool resource dilemma. The extent of collective interests that resource users concern affects their decisions in collective action, which further impacts the sustainable use of common-pool resources. We use a grazing experiment to observe and measure collective action. …

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Fencing Lands To Enhanced Climate Change Resilience, Promoting Biodiversity Regeneration And Improved Livelihoods Of Climate Change In Makueni County, Frank Wesonga, Francis Keya Feb 2024

Fencing Lands To Enhanced Climate Change Resilience, Promoting Biodiversity Regeneration And Improved Livelihoods Of Climate Change In Makueni County, Frank Wesonga, Francis Keya

IGC Proceedings (1977-2023)

Kenya is a food insecure country, weather patterns are drastically changing and people are losing livelihoods and earnings when their lands dry, water for domestic supply lacks and livestock die further frustrating livelihoods of the poor. This paper briefly discusses Fencing of lands as prerequisite to biodiversity protection and faster water retention mechanism, through tree planting, enhancing CO2 sequestration as trees, shrubs and vegetation’s find suitable environment to grow. Baringo and Makueni County are characterized by unsustainable agriculture, environmental degradation resulting from soil erosion, high poverty levels and food insecurity due to unpredictable dry spells and climate change. The present …

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Effects Of Intrinsic Tannins On Metabolome During Sainfoin Ensiling, Rongzheng Huang Feb 2024

Effects Of Intrinsic Tannins On Metabolome During Sainfoin Ensiling, Rongzheng Huang

IGC Proceedings (1977-2023)

Condensed tannins (CT) from sainfoin have a high capacity to inhibit proteolysis. The objective of the present study was to investigated the effects of CT (following supplementation of deactivated CT with polyethylene glycol [PEG]) on metabolome during sainfoin ensiling. As results, in total, 510 metabolites were identified after 60 d of sainfoin ensiling, with 33 metabolites were annotated in the Kyoto Encyclopedia of Genes and Genomes (KEGG) database. Among those metabolites, phospholipids were the most abundant (72.7% of total 33 metabolites). In addition, 10 up-regulated and 23 down-regulated metabolites, respectively, were identified in the PEG treated group when compared with …

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Physically Adjusted Ndf: Integrating Forage Physical Form With Diet Complexity On The Farm, P. J. Kononoff, M. B. Hall Feb 2024

Physically Adjusted Ndf: Integrating Forage Physical Form With Diet Complexity On The Farm, P. J. Kononoff, M. B. Hall

IGC Proceedings (1977-2023)

Physical form of forages and their neutral detergent fiber (NDF) content are crucial in ruminant diets for maintaining a healthy rumen and a productive animal. A challenge has been in taking the concept from its research base and applying it successfully in varied diets. A new system for physically adjusted NDF (paNDF) offers an option. It takes into account the forage, NDF, starch and other components in the diet and uses the Penn State Particle Separator on farm to assess total mixed ration particle size to provide recommendations on directions to move the diet to maintain a healthy rumen. This …

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Pasture Production And Grazing System In Assist Project: Outcome And Replication Viability In Nigeria For Sustainable Ruminant Production, Okanlade A. Lawal-Adebowale, M. J. Rivero, J. Hunt, Sarah Morgan, Hannah Fleming, R. Pywell, Jonathan Storkey Feb 2024

Pasture Production And Grazing System In Assist Project: Outcome And Replication Viability In Nigeria For Sustainable Ruminant Production, Okanlade A. Lawal-Adebowale, M. J. Rivero, J. Hunt, Sarah Morgan, Hannah Fleming, R. Pywell, Jonathan Storkey

IGC Proceedings (1977-2023)

As important as pasture is to productive management of cattle, sheep and goats, intensive development of grassland for ruminant animals is rare in Nigeria largely due to no conscious effort at pasture cultivation in the country. Consequently, nomadic and free grazing systems remain a practice in the country, with resultant poor animal productivity and agro-related conflicts between ruminant keepers and crop farmers and/or agro-processors. The need to revert this situation underscored the exploration of the potential value of the innovative pasture production and grazing management system tested under the Achieving Sustainable Agricultural Systems (ASSIST) programmme in Rothamsted Research, United Kingdom, …

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Drought Tolerance Dissection And Molecular Breeding In Alfalfa, Luo Dong, Qiang Zhou, Xueming Dong, Wenxian Liu, Zhipeng Liu Feb 2024

Drought Tolerance Dissection And Molecular Breeding In Alfalfa, Luo Dong, Qiang Zhou, Xueming Dong, Wenxian Liu, Zhipeng Liu

IGC Proceedings (1977-2023)

Drought stress is one of the leading impediments that limit the productivity of global alfalfa (Medicago sativa). The underlying molecular and genetic mechanisms for drought tolerance in alfalfa remain largely unclear. In order to fully reveal the transcriptional changes of alfalfa in response to abiotic stress, the alfalfa transcriptome database under mannitol (simulated drought stress), NaCl (simulated salt stress), or exogenous ABA application was built via various RNA-seq technologies. Through further screening of the transcriptome database, a number of genes significantly induced by drought stress, such as the Nuclear Transport Factor 2-like (MsNTF2L), Drought-Induced Unknown Protein 1 (MsDIUP1), …

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Effects Of Incorporation Of Sainfoin (Onobrychis Viciafolia Scop.) With Cool Season Grasses On In Vitro Digestibility And Ch4 Emission, H. P. Poudel, Y. Wang, T. Mcallister, Z. J. Zu, B. Eisenreich, S. Acharya Feb 2024

Effects Of Incorporation Of Sainfoin (Onobrychis Viciafolia Scop.) With Cool Season Grasses On In Vitro Digestibility And Ch4 Emission, H. P. Poudel, Y. Wang, T. Mcallister, Z. J. Zu, B. Eisenreich, S. Acharya

IGC Proceedings (1977-2023)

Sainfoin (Onobrychis viciafolia Scop.) is an important non-bloating perennial leguminous forage. The tannins in sainfoin alter protein metabolism in the rumen and have been implicated in altering both nitrous oxide and methane emissions. However, the effect of sainfoin when mixed with cool-season forages is unknown. Therefore, in this study, we evaluated the in-vitro fermentation of sainfoin hay mixed with two other perennial cool-season forages, meadow bromegrass and orchardgrass at five ratios (0:100, 25:75, 50:50, 75:50, and 100:0). Data on dry matter disappearance (DMD), neutral detergent fiber disappearance (NDFD), gas production (GP) methane (CH4) emissions, and ammonia production were collected …

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Condensed Tannins And Total Phenols In Stylosanthes Spp., M. V. F. Santos, J. P. Muir, O. F. Oliveira, I. M. Macêdo, W. P. S. Diniz, M. V. Cunha, José C. B. Dubeux Jr., M. A. Lira, R. L. C. Ferrreira Feb 2024

Condensed Tannins And Total Phenols In Stylosanthes Spp., M. V. F. Santos, J. P. Muir, O. F. Oliveira, I. M. Macêdo, W. P. S. Diniz, M. V. Cunha, José C. B. Dubeux Jr., M. A. Lira, R. L. C. Ferrreira

IGC Proceedings (1977-2023)

Rangelands, such as the species of the genus Stylosanthes, are plants highly selected by animals and represent an important forage source for livestock in the Northeast region of Brazil. Plants of this genus are naturally occurring in several places in Brazil and other semi-arid areas. The variability of condensed tannins and total phenols in different Stylosanthes accessions is still poorly characterized. Based on that, the objective of this study was to quantify the content of condensed tannins and total phenols of Stylosanthes accessions collected in different physiographic zones of the State of Pernambuco and cultivated in germplasm banks. The …

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