A5021817867- Photosynthetic Processes and Mechanisms
- Spectroscopy and Quantum Chemical Studies
- Photoreceptor and optogenetics research
- Metal-Catalyzed Oxygenation Mechanisms
- Metalloenzymes and iron-sulfur proteins
- Algal biology and biofuel production
- Electrocatalysts for Energy Conversion
- Mitochondrial Function and Pathology
- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Marine and coastal ecosystems
- Advanced Battery Materials and Technologies
- Light effects on plants
- Porphyrin and Phthalocyanine Chemistry
- Porphyrin Metabolism and Disorders
- Plant Stress Responses and Tolerance
- Hemoglobin structure and function
- Electrochemical Analysis and Applications
- Microbial Community Ecology and Physiology
- Microbial Fuel Cells and Bioremediation
- Electron Spin Resonance Studies
- Elasticity and Material Modeling
- Micro and Nano Robotics
- Microbial Metabolic Engineering and Bioproduction
- Enzyme Structure and Function
Idaho National Laboratory
2019-2023
Abbott (Canada)
2021
Bruker (Germany)
2017
University College London
2000-2010
University of Strathclyde
2010
University of Oxford
2006-2010
Argonne National Laboratory
2010
University of Minnesota
2005-2009
Queen Mary University of London
1996-2006
UCL Australia
1994-2005
The linkage between abuse to artisanal cobalt miners—including children—in the Democratic Republic of Congo (DRC) and use in advanced batteries has prompted global supply chain reviews, responsible sourcing initiatives, ...From 2000 through 2020, demand for manufacture grew 26-fold. Eighty-two percent this growth occurred China China’s refinery production increased 78-fold. Diminished industrial mine early-to-mid ...
Detergent‐treatment of higher plant thylakoids with Triton X‐100 at pH 6.3 has been used to purify a PS2 fraction very high rates oxygen evolution (1000 μmol.mg chl −1 .h ). A photosynthetic unit size about 300 chlorophyll (chl) molecules determined by optical methods, suggesting an average turnover time for 2 ms. The donor system P680 + is particularly well preserved in the preparation, as judged reduction kinetics, detection EPR Signal II LT and presence potential form cytochrome b ‐559...
Enabling a 10 min fast charge for electric vehicles is possible route to reduce range anxiety and increase the utility of vehicles. While lithium plating during charging known challenge, full suite limitations which occur in cells are unknown. In present work central constraints extreme explored through extensive experiments analysis single layer graphite/NMC532 pouch cells. Methods developing fast-charging protocols considering impedance transport presented relative benefits altering rate,...
Understanding household behavior and its macro consequences for society is pivotal climate change adaptation. Yet, traditional policy decision-support models nature–society systems oversimplify human behavior. Using original modeling ...Despite the growing calls to integrate realistic in sustainability science models, representative rational agent prevails. This especially problematic adaptation that relies on actions at various scales: from ...
Broad use of global or spatially averaging measurements over a cell to characterize highly localized Li plating phenomena in lithium-ion batteries during fast charging has created disconnect between and the underlying causes. Consequently, field is missing clear path implementing as well expand into extreme (XFC). Aiming bridge these gaps, we present detailed look local detection consequent cycle life implications for electrodes cells under XFC by utilizing electrochemistry high-energy X-ray...
Abstract As the battery industry shifts toward high Ni content cathodes, such as LiNi 0.8 Mn 0.1 Co O 2 [NMC811], a complete understanding of degradation mechanisms NMC811 under extreme fast charging (XFC) (XFC, ≤10–15 min charging) conditions is needed. Such comprehensive would identify most critical materials gaps that need to be addressed for enabling XFC long‐life cells electric vehicles. This study maps out key aging cycled at different (between 1C and 9C) up 1000 cycles. To acquire...
The S0* state was generated by incubation of dark-adapted (S1 state) photosystem II membranes either with the exogenous two electron reductant hydrazine and subsequent 273 K illumination in presence DCMU or dark low amounts one hydroxylamine. In agreement earlier reports, S1 S-1 states were found to be paramagnetic resonance (EPR) silent. However, 0.5-1.5% methanol, a weak EPR multiline signal centered around g = 2.0 observed at 7 for both procedures. This has similar average line splitting...
Heart valve replacements composed of living tissue that can adapt, repair, and grow with a patient would provide more clinically beneficial option than current inert replacements. Bioartificial valves were produced by entrapping human dermal fibroblasts within fibrin gel. Using mold design presents appropriate mechanical constraints to the cell-induced gel compaction, gross fiber alignment (commissure-to-commissure in leaflets circumferential root) basic geometry native aortic obtained....
Illumination at 230 K of dithionite‐reduced particles results in the appearance an EPR detectable radical 13 G wide with g = 2.0033. This is formed a ratio 2.28 (±0.5)/P700. Investigation time course formation shows two components are present. One ( A 1 ) has 2.0051 and other o 2.0024. Reduction increase reaction centre triplet formation, subsequent reduction decrease to base level. We propose that these function sequentially transfer electrons from P700 iron—sulphur acceptors.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of the origin "S3" EPR signal from oxygen-evolving complex photosystem 2: role tyrosine ZBeverly J. Hallahan, Jonathan H. A. Nugent, Joseph T. Warden, and Michael C. W. EvansCite this: Biochemistry 1992, 31, 19, 4562–4573Publication Date (Print):May 1992Publication History Published online1 May 2002Published inissue 19 1992https://pubs.acs.org/doi/10.1021/bi00134a005https://doi.org/10.1021/bi00134a005research-articleACS...
The growth in refractive surgeries and corneal replacements has fueled interest the development of a tissue-engineered cornea. This study characterizes microstructure biomechanical properties film-based stroma equivalents over time culture. increased collagen density films was hypothesized to result improved mechanical both initially time. stromal equivalent examined using atomic force microscopy scanning electron microscopy; properties, relaxed modulus, ultimate tensile strength were...
Low-temperature e.p.r. (electron-paramagnetic-resonance) spectroscopy was used to detect electron-transport components in Chromatium chromatophores with signals the g=2.00 region. High-potential iron protein (Em8.0=+325mV, where Em8.0 is midpoint potential at pH8) and a second component (g=1.90, Em8.0=+285mV) are oxidized illuminated chromatophores. Two iron–sulphur proteins (g=1.94) Em8.0=−290mV Em8.0=−50mV present. One (Em8.0=−50mV) reduced on illumination. A (g=1.82) Em8.0=−135mV...