A5025983072- Agriculture and Biological Studies
- Yeasts and Rust Fungi Studies
- Weed Control and Herbicide Applications
- Forest Insect Ecology and Management
- Pesticide and Herbicide Environmental Studies
- Agronomic Practices and Intercropping Systems
- Soybean genetics and cultivation
- Soil Carbon and Nitrogen Dynamics
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Allelopathy and phytotoxic interactions
- Plant Physiology and Cultivation Studies
- Agriculture, Plant Science, Crop Management
- Cold Atom Physics and Bose-Einstein Condensates
- Fusion materials and technologies
- Legume Nitrogen Fixing Symbiosis
- Crop Yield and Soil Fertility
- Seedling growth and survival studies
- Turfgrass Adaptation and Management
- Bioenergy crop production and management
- Plant Pathogens and Resistance
- Plant and fungal interactions
- Clostridium difficile and Clostridium perfringens research
- Gut microbiota and health
- Orbital Angular Momentum in Optics
Karlsruhe Institute of Technology
2022-2024
National Institute of Mental Health
2013-2024
National Institutes of Health
2013-2024
University of Nebraska–Lincoln
2002-2023
Great North Children's Hospital
2022-2023
Newcastle upon Tyne Hospitals NHS Foundation Trust
2023
National and Kapodistrian University of Athens
2023
Complejo Hospitalario Universitario de Santiago
2023
Newcastle University
2022-2023
Instituto de Investigación Sanitaria de Santiago
2023
A new magneto-optical trap is demonstrated which confines atoms predominantly in a ``dark'' hyperfine level, that does not interact with the trapping light. This leads to much higher atomic densities as repulsive forces between due rescattered radiation are reduced and loss excited-state collisions diminished. In such trap, more than ${10}^{10}$ sodium have been confined approaching ${10}^{12}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$.
Order-of-magnitude improvements in the level and duration of current driven by lower-hybrid waves have been achieved PLT tokamak. Steady currents up to 165 kA maintained for 3.5 sec 420 0.3 800-MHz rf power alone. The principal carrier appears be a high-energy (\ensuremath{\sim} 100-keV) electron tail, concentrated central 20- 40-cm core 80-cm-diam discharge column.
Laboratory and greenhouse studies were conducted to determine imazaquin imazethapyr adsorption, mobility, efficacy in Sharpsburg silty clay loam, Holdrege silt Tripp sandy loam soils after adjusting pH 5, 6, 7. Both herbicides more strongly absorbed, less mobile, efficacious at a lower pH. Observations attributed ionic bonding resulting from protonation of basic functional groups on the herbicide molecules as decreased. Adsorption was greatest least soil. Conversely, mobile coarse-textured...
Peak fusion power production of 6.2\ifmmode\pm\else\textpm\fi{}0.4 MW has been achieved in TFTR plasmas heated by deuterium and tritium neutral beams at a total 29.5 MW. These have an inferred central alpha particle density 1.2\ifmmode\times\else\texttimes\fi{}${10}^{17}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}3}$ without the appearance either disruptive magnetohydrodynamics events or detectable changes Alfv\'en wave activity. The measured loss rate energetic particles agreed with...
Photosystem II (PS II) inhibitors halt electron flow within the photosynthetic transport chain, thereby leading to increased oxidative stress. As a result, their addition mesotrione, which inhibits carotenoid biosynthesis by inhibition of enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD), is complementary. Field and greenhouse experiments were conducted in 2002 2003 investigate joint action POST mesotrione plus PS inhibitor herbicide combinations. The was investigated across five plant...
Herbicide‐resistant crops like glyphosate resistant (GR) soybean [ Glycine max (L.) Merr.] are gaining acceptance in U.S. cropping systems. Comparisons from cultivar performance trials suggest a yield suppression may exist with GR soybean. Yield suppressions result either genetic differentials, the gene/gene insertion process, or glyphosate. Grain of is probably not affected by due to gene its process (GR effect) has been reported. We conducted field experiment at four Nebraska locations 2...
Summary Intensive field surveys were conducted to deter mine the spatial distribution of composite broad leaf and grass weed seedlings in seven maize five soybean fields eastern Nebraska 1992. Farmer where herbicides applied a 38‐cm band over 76‐cm spaced rows chosen for this study. Weed populations measured interrow band‐treated intrarow. Spatial maps constructed or broadleaf weeds revealed that individual species as well assemblages are highly aggregated. On average, 30% sample area 12...
Weed competitiveness can be quantified with the concept of competitive index (CI), a relative scale weed competitiveness. Field studies were conducted in 2002 and 2003 northeastern southeastern Nebraska to evaluate influence soybean row spacing emergence time on major species soybean. Ten seeded spaced 19 76 cm apart at planting, emergence, first trifoliate leaf stages Total dry matter (TDM), plant volume, percent yield loss arbitrarily selected as base for determining CI each species....
After many years of fusion research, the conditions needed for a D–T reactor have been approached on Tokamak Fusion Test Reactor (TFTR) [Fusion Technol. 21, 1324 (1992)]. For first time unique phenomena present in plasma are now being studied laboratory plasma. The magnetic experiments to study plasmas using nearly equal concentrations deuterium and tritium carried out TFTR. At maximum power 10.7 MW, 39.5 MW neutral-beam heating, supershot discharge 6.7 high-βp following current rampdown....
The Tomamak Fusion Test reactor has performed initial high-power experiments with the plasma fueled nominally equal densities of deuterium and tritium. Compared to pure plasmas, energy stored in electron ions increased by \ensuremath{\sim}20%. These increases indicate improvements confinement associated use tritium possibly heating electrons \ensuremath{\alpha} particles created D-T fusion reactions.
Studies to predict pesticide fate often lack measurements of model input parameters. Using independent data sets and understanding how soil properties affect herbicide retention degradation may result in more accurate prediction fate. We conducted laboratory studies determine the influence on atrazine adsorption degradation. These will be used a separate study involving model. Atrazine desorption isotherms were constructed for six depths Hastings silty clay loam (fine, montmorillonitic,...
Abstract Weed competition is a limiting factor in warm‐season grass establishment often delaying the first forage harvest 2 or 3 years. control with herbicides could reduce this resulting more rapid establishment. Field experiments were conducted to evaluate effect of atrazine [2‐chloro‐4‐(ethylamino)‐6‐(isopropylamino)‐ s ‐triazine] on weed control, establishment, and yield during seeding following year. Several species spring seeded at locations having distinctly different soils. The soils...
Despite considerable interest and research in the canine fecal microbiome, our understanding of its species-level composition remains incomplete, as majority studies have only provided genus-level resolution. Here, we used full-length 16S rRNA gene sequencing to characterize microbiomes 286 presumed healthy dogs living homes North America who are devoid clinical signs, physical conditions, medication use, behavioral problems. We identified bacterial species comprising core microbiome...
Glyphosate ( N ‐(phosphonomethyl) glycine)‐resistant (GR) soybean [ Glycine max (L.) Merr.] technology is gaining acceptance in U.S. cropping systems, yet potential yield suppression from either cultivar genetic differentials, the GR gene/gene insertion process, or glyphosate a concern. Other work shows that process may suppress yield. No one has reported effects of on diverse group commercially available cultivars. In this study we evaluated sources suppression—the effect yield, growth, and...
We demonstrate cooling and slowing of atoms in isotropic laser light. As the slow, they compensate for their changing Doppler shift by preferentially absorbing photons at a varying angle to direction motion, resulting continuous beam slow unperturbed an intense beam. point out several novel features light, show that it can be superior with directed beams.
Triazine-resistant (TR) common waterhemp was reported and confirmed in Fillmore County, NE 1990. A survey of 81 fields conducted to characterize the occurrence grower practices. Sampled fell into three categories: suspected by growers contain resistant plants (26 fields), randomly selected (28 adjacent containing TR (27 fields). Resistant were found 64% all fields. Resistance 92% plants. Adjacent no more likely than chosen Crop rotation did not significantly affect resistance. associated...
We demonstrate the combined slowing and transverse cooling of a sodium atomic beam. Atoms have been slowed in Zeeman slower with increasing magnetic field transversely cooled by two-dimensional optical molasses inside slower. The increases brightness slow beam allows it to be deflected out intense laser light.
Laboratory and field studies were conducted to compare the degradation rate of EPTC ( S -ethyl dipropylthiocarbamate) in soils with a previous history application vs. no prior application. experiments showed rapid breakdown 14 C-carbonyl CO 2 Kennebec silt loam (sil) Tripp very fine sandy (vfsl) exposure EPTC. A single vfsl was sufficient increase evolution. The dependent on soil moisture from below 3% independent above 3%. Patterns at 5, 15, 25 C sil without described by exponential decay....
Interactions between initial weed seedling density and postemergence herbicide mechanical control were studied in two field experiments conducted 1994 1996. Increasing seedbank densities of velvetleaf (0 to 500 seed m –2 ) soybean or common sunflower (250 2,500 1.3 corn established at Lincoln Mead, NE, respectively. Emerged seedlings treated with increasing intensities from none bentazon alone interrow cultivation. A positive linear relationship surviving was consistently observed. As...
WeedSOFT® is a decision support system that was developed to help farmers and consultants in Nebraska with the selection of optimal weed management strategies. evolved from HERB, bioeconomic model for soybean North Carolina. The program composed four independent modules, namely, ADVISOR, EnviroFX, MapVIEW, WeedVIEW. ADVISOR helps user select treatment based on maximum yield or net gain. EnviroFX MapVIEW provide environmentally relevant herbicide information county soil maps indicate...
An increased rate of butylate ( S -ethyl diisobutylthiocarbamate) degradation occurred on a Kennebec silt loam (sil) exhibiting rapid EPTC dipropylthiocarbamate) breakdown in the field. Butylate was not as field soils previously treated with EPTC. Addition R-33865 O, O -diethyl- -phenol phosphorothioate) to extended its persistence and without prior application. Although microbial butylate, EPTC, vernolate -propyl EPTC-pretreated soils, much more than degradation. or their soil pretreated In...
There is growing interest in the application of fecal microbiota transplants (FMTs) small animal medicine, but there are few published studies that have tested their effects domestic cat (Felis catus). Here we use 16S rRNA gene sequencing to examine microbiome changes 46 cats with chronic digestive issues received FMTs using lyophilized stool was delivered oral capsules. Fecal samples were collected from FMT recipients before and two weeks after end full course 50 capsules, as well donors (N...
Intensive field surveys were conducted in eastern Nebraska to determine the frequency distribution model and associated parameters of broadleaf grass weed seedling populations. The negative binomial consistently fit data over time (1992 1993) space (fields) for both inter intrarow other distributions tested (Poisson with zeros, Neyman type A, logarithmic Poisson-binomial) did not as distribution. Associated is a k parameter. nonspatial aggregation parameter related variance at given mean...