A5002128832- Plant biochemistry and biosynthesis
- Polymer Nanocomposites and Properties
- Microbial Metabolic Engineering and Bioproduction
- Plant Gene Expression Analysis
- Polymer crystallization and properties
- biodegradable polymer synthesis and properties
- Biochemical and biochemical processes
- Plant-Derived Bioactive Compounds
- Biofuel production and bioconversion
- Microbial Natural Products and Biosynthesis
- Biodiesel Production and Applications
- Plant tissue culture and regeneration
- Thermochemical Biomass Conversion Processes
- Agricultural and Food Sciences
- Lubricants and Their Additives
- Antioxidant Activity and Oxidative Stress
- Lignin and Wood Chemistry
- Advanced Sensor and Energy Harvesting Materials
- Natural Fiber Reinforced Composites
- Genomics and Phylogenetic Studies
- Photosynthetic Processes and Mechanisms
- Electrospun Nanofibers in Biomedical Applications
- Petroleum Processing and Analysis
- Thermal and Kinetic Analysis
- Research in Cotton Cultivation
Western Regional Research Center
2015-2025
Agricultural Research Service
2015-2025
United States Department of Agriculture
2015-2024
Cornell University
2019
University of Arizona
2019
University of Nevada, Reno
2007
University of Minnesota
2007
The discovery that the commercial rubber antidegradant 6PPD reacts with ozone (O3) to produce a highly toxic quinone (6PPDQ) spurred significant research effort into nontoxic alternatives. This work has been hampered by lack of detailed understanding mechanism protection affords compounds against ozone. Herein, we report high-level density functional theory studies early steps and PPD (p-phenylenediamine) ozonation, identifying key contribute antiozonant activity PPDs. In this, establish our...
Abstract Background Parthenium argentatum (guayule) is an industrial crop that produces latex, which was recently commercialized as a source of latex rubber safe for people with Type I allergy. The complete plastid genome P. sequenced. sequence provides important information useful genetic engineering strategies. Comparison to the sequences genomes from three other members Asteraceae, Lactuca sativa, Guitozia abyssinica and Helianthus annuus revealed details evolution four genomes....
Plant-soil feedback (PSF) processes impact plant productivity and ecosystem function, but they are poorly understood because PSFs vary significantly with soil type, growth stage, environmental conditions. Controlled greenhouse studies essential to unravel the mechanisms associating productivity; however, successful implementation of these controlled experiments is constrained by our understanding persistence microbiome during transition from field greenhouse. This study evaluates...
Taraxacum kok-saghyz dandelion is a leading alternative natural rubber-producing plant that thrives in temperate climates. Latex, rubber and transferase (RTase) activity of genetically identical clonal plants, produced tissue culture, then grown the field for 6 months to 1 year were quantified throughout development. Induction accumulation occurred between three weeks old. RTase increased with age up 16 weeks, while latex concentration week 20. When enzymatically active WRP saturated 5 mM...
Abstract Natural rubber ( NR ) microfibers were obtained from NR/chloroform solutions with or without vulcanization agents, by a solution blow spinning SBS technique. The showed ribbon‐like morphology average widths ranging 15 to 45 μm, depending on the processing conditions. Concentrations of 3%, 4%, and 5% (wt/vol) /chloroform compared; at 4% wt/vol process was most stable, fiber width homogeneous. Microfibrous membranes incorporating vulcanizing agents treated temperatures 70, 80, 90°C...
Abstract Summary: Cellulose nanofibrils (CNF) were extracted by acid hydrolysis from cotton microfibrils and nanocomposites with polyaniline doped dodecyl benzenesulphonic (PANI‐DBSA) obtained in situ polymerization of aniline onto CNF. The ratios between DBSA to oxidant varied the characterized four probe DC electrical conductivity, ultraviolet‐visible‐near infrared (UV‐Vis ‐ NIR) Fourier‐transform (FTIR) spectroscopies X‐ray diffraction (XRD). FTIR UV‐Vis/NIR characterization confirmed...
ABSTRACT Guayule ( Parthenium argentatum ) is under cultivation in the southwestern United States as an alternative source of natural rubber free from proteins that cause Type I latex allergies. However, since guayule lacks protein‐polymer interactions present Hevea latex, its physical and chemical properties may differ. The solvent‐soluble (Sol) insoluble (Gel) fractions rubbers were isolated through a solubilization/centrifugation deproteinization process. Protein could be reduced or...
A number of biochemical processes rely on isoprenoids, including the post-translational modification signaling proteins and biosynthesis a wide array compounds. Photoactivatable analogues have been developed to study isoprenoid utilizing enzymes such as synthases prenyltransferases. While these initial proved be excellent structural with good cross-linking capability, they lack stability needed when goals include isolation cross-linked species, tryptic digestion, subsequent peptide...
Abstract This work reports a systematic comparative study of the technological properties natural lattices and rubbers extracted from Hancornia speciosa Gomes Hevea brasiliensis [(Willd. ex Adr. de Juss.) Muell.‐Arg.] (clone RRIM 600) trees 11 collections in Brazil throughout 2004. Natural rubber latex particle sizes distributions were quite similar with an average diameter around 1 μm. Molecular weight, Wallace plasticity, Mooney viscosity values approximately same for both rubbers. Fourier...