A5025237401- Nanotechnology research and applications
- Catalysis for Biomass Conversion
- Experimental Learning in Engineering
- Thermochemical Biomass Conversion Processes
- Catalysis and Hydrodesulfurization Studies
- Enzyme Catalysis and Immobilization
- Semiconductor materials and interfaces
- Semiconductor materials and devices
- Finite Group Theory Research
- Analytical Chemistry and Chromatography
- Archaeology and Natural History
- Silicon and Solar Cell Technologies
- Mycotoxins in Agriculture and Food
- Lignin and Wood Chemistry
- Hydrology and Watershed Management Studies
- Geometric and Algebraic Topology
- Adsorption and biosorption for pollutant removal
- Biofuel production and bioconversion
- American Environmental and Regional History
- Phase Equilibria and Thermodynamics
- Microbial Metabolic Engineering and Bioproduction
- Soil and Water Nutrient Dynamics
- Thin-Film Transistor Technologies
- Homotopy and Cohomology in Algebraic Topology
- Quantum-Dot Cellular Automata
Agricultural Research Service
2015-2024
National Center for Agricultural Utilization Research
2015-2024
Rochester Institute of Technology
1999-2023
United States Department of Agriculture
2012-2021
Grove City College
2015
Environmental Protection Agency
2011-2012
Lawrence Livermore National Laboratory
2011
King University
2007
University of Rochester
2005-2006
The Ohio State University
2003-2005
The self-assembly of monodisperse gold and silver colloid particles into monolayers on polymer-coated substrates yields macroscopic surfaces that are highly active for surface-enhanced Raman scattering (SERS). Particles bound to the substrate through multiple bonds between colloidal metal functional groups polymer such as cyanide (CN), amine (NH(2)), thiol (SH). Surface evolution, which can be followed in real time by ultraviolet-visible spectroscopy SERS, controlled yield high...
This paper details the kinetic aspects of covalent self-assembly colloidal Au particles from solution onto immobilized organosilane polymers. On glass substrates, surface formation can be monitored using UV−vis spectroscopy and field emission scanning electron microscopy (FE-SEM). Correlation these data allows effect nanostructure on bulk optical properties to evaluated. At short derivatization times, particle coverage is proportional (time)1/2. The sticking probability p, defined as ratio...
Ag-coated Au colloidal particles have been prepared by reduction of Ag+ in the presence preformed colloids. The composition Au100-xAgx was varied from x = 0 to 80. SERS spectra pyridine, p-nitroso-N,N'-dimethylaniline (p-NDMA), and trans-1,2-bis(4-pyridyl)ethylene (BPE) obtained with these At monolayer Ag coverages (x < 10), optical are indistinguishable uncoated particles. However, behavior aggregated colloids 647.1 nm excitation is extremely dependent upon Ag:Au ratio. Very small amounts ≤...
Abstract Biodiesel, an alternative fuel derived from vegetable oils or animal fats, continues to undergo rapid worldwide growth. Specifications mandating biodiesel quality, most notably in Europe (EN 14214) and the USA (ASTM D6751), have emerged that limit feedstock choice production of fuel. For instance, EN 14214 contains a specification for iodine value (IV; 120 g I 2 /100 maximum) eliminates soybean oil as potential feedstock, it generally has IV >120. Therefore, partially...
Starch aerogels are a class of low density, highly porous, renewable materials currently prepared exclusively from retrograded starch gels and interest due to their high surface area, porosity, biocompatibility, biodegradability. Recently, we have reported the preparation properties amylose-fatty acid salt helical inclusion complexes by steam jet-cooking amylose-containing starches then blending resulting dispersions with sodium palmitate. Dispersions these amylose-sodium palmitate prevent...
2,5-Bis(hydroxymethyl)furan (BHMF) produced from 5-hydroxymethylfurfural (HMF) plays a significant role in the production of resins, fibers, foams, drugs, polymers, ketones and ethers. In this study, novel cost-effective copper iron magnetic bimetallic nanocatalyst supported on activated carbon (CuO–Fe3O4/AC) was developed for selective hydrogenation HMF into BHMF via Meerwein–Ponndorf–Verley (MPV) reaction using ethanol as hydrogen donor. Various analytical techniques such HRTEM-EDX, TGA,...
Reduction of NO2- by the Cu-containing nitrite reductase from Achromobacter cycloclastes produces NO as primary product initially, but accumulates, production levels-off and N2O becomes significant. Reaction enzyme with in presence increases amount significantly, while trapping nitrosylhemoglobin or rapid removal sparging results no detectable production. 15NO2- 14NO formation mixed isotope (14N, 15N)O ca. 45% yield. In contrast, absence has effect on a prototypical heme cd1-containing...
Ammonia is a major fugitive gas emitted from livestock operations and fertilization production. This study tested the potential of various biochars in removing gaseous ammonia via adsorption processes. Gaseous capacities made wood shaving chicken litter with different thermal conditions activation techniques were determined using laboratory column tests. non-activated ranged 0.15 to 5.09 mg·N/g, which comparable that other commercial activated carbon natural zeolite. There no significant...
Abstract The transesterification of soybean oil with glycerol, 1,2‐propanediol, and methanol by an immobilized lipase in flowing supercritical carbon dioxide for the synthesis monoglycerides is described. A from Candida antarctica was used to catalyze reaction ethylene glycol, methanol. Reactions were performed at a density 0.72 g/L flow rate 6 µL/min (expanded gas). substrates added flows ranging 2.5 100 µL/min. Monoglycerides obtained up 87 wt%, fatty acid methyl esters nearly wt%....
Abstract The direct methanolysis of triglycerides in flowing supercritical carbon dioxide by an immobilized lipase is described. reaction system consists two syringe pumps for substrate addition and another delivering CO 2 at 24.1 MPa. Corn oil pumped into the stream a rate 4 μL/min, methanol 5 μL/min to yield fatty acid methyl esters (FAME) >98% conversion. Direct soy flakes gives FAME similar yields. This combined extraction/reaction performed 17.2 MPa 50°C. profiles obtained these seed...
Two approaches to preparation of Ag-clad Au colloid monolayers are described. Each begins with a preformed monolayer colloidal particles on glass, Au-coated quartz, or In-doped SnO2. Chemical reduction Ag+ from commercial Ag coating formulation (LI Silver) electrochemical leads surfaces for which the amount deposited can be controlled. On transparent substrates, deposition followed in real time by UV−visible spectroscopy. When substrate is an electrode, monitored coulometry; chemical...
A switchgrass biochar (SB) produced by fast pyrolysis and a corn stover (CSB) from slow process were mechanically milled characterized. Both of these biochars are very cost-effective originate as residues bioenergy production the industry, respectively. These two evaluated for their sorptive properties with both water estrogen containing compounds estrone, b-estradiol, zearalenone via batch rebinding assays in salt solutions. Although CSB had greater total surface area than SB, SB was more...