Article
Multidisciplinary Sciences
Chaoyue Li, Shiyu Feng, Lei Xu, Xiaotian Peng, Weihua Liu
Summary: In this study, the solubilities of CO2, O-2, and N-2 in rocket propellant 5 (RP5) were measured using the static method of isochoric saturation. The results showed that the solubilities of all three gases increased with pressure, while the solubility of CO2 decreased and the solubility of O-2 and N-2 increased with temperature. The Henry's constants for the gases in RP5 decreased over the experimental temperature and pressure ranges.
SCIENTIFIC REPORTS
(2022)
Article
Agricultural Engineering
Facundo J. Marcos Valle, Analia Gaston, Rita M. Abalone, Diego A. de la Torre, Claudia C. Castellari, Ricardo E. Bartosik
Summary: This study investigated the dynamics of oxygen and carbon dioxide concentrations in corn seeds stored under different temperature and moisture content conditions. Several respiratory rate prediction models were proposed, showing that the rate increased with moisture content and temperature, with O-2 concentration affecting respiration only after reaching a critical limit.
BIOSYSTEMS ENGINEERING
(2021)
Article
Environmental Sciences
Ryan B. Wallace, Bradley J. Peterson, Christopher J. Gobler
Summary: The study revealed that changes in photosynthetic and respiration rates in coastal marine habitats can lead to considerable variability in ecosystem metabolism on different time scales, from diurnal to seasonal. Different habitats showed diverse responses to changes in pH and DO, emphasizing the importance of enhancing seagrass and macroalgae cultivation to maintain estuarine ecological balance in the face of predicted declines in pH and oxygen levels.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Eric D. Walter, Difan Zhang, Ying Chen, Kee Sung Han, J. David Bazak, Sarah Burton, Kathryn O'Harra, David W. Hoyt, Jason E. Bara, Deepika Malhotra, Sarah I. Allec, Vassiliki-Alexandra Glezakou, David J. Heldebrant, Roger Rousseau
Summary: Efficient direct air capture (DAC) of CO2 can be achieved by using a combination of a CO2-selective membrane and a CO2 capture solvent. The interaction between a water-lean carbon-capture solvent, a PEEK-ionene membrane, and CO2 was studied using advanced NMR techniques and simulations. It was found that the solvent provides a thermodynamic and kinetic pathway for CO2 to be drawn through the membrane, enhancing its performance. The reaction between the solvent and CO2 also creates structural changes that facilitate faster CO2 diffusion at the interface.
Article
Limnology
Kelly S. Aho, Jennifer H. Fair, Jake D. Hosen, Ethan D. Kyzivat, Laura A. Logozzo, Lisa C. Weber, Byungman Yoon, Jay P. Zarnetske, Peter A. Raymond
Summary: This study found that an intense rainstorm caused a significant change in the dynamics of N2O emissions from streams and rivers, shifting some sites from N2O sources to sinks. The post-storm period of N2O undersaturation led to net negative emissions at five study sites.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Chemistry, Medicinal
H. Mert Polat, Hirad S. Salehi, Remco Hens, Dominika O. Wasik, Ahmadreza Rahbari, Frederick de Meyer, Celine Houriez, Christophe Coquelet, Sofia Calero, David Dubbeldam, Othonas A. Moultos, Thijs J. H. Vlugt
Summary: The paper introduces two new major features added to the Monte Carlo (MC) simulation code Brick-CFCMC for phase- and reaction equilibria calculations: thermodynamic integration for computing excess chemical potentials (mu(ex)) and hybrid MC/MD translation and rotation trial moves. These new features significantly increase the efficiency of sampling the configuration space.
JOURNAL OF CHEMICAL INFORMATION AND MODELING
(2021)
Article
Multidisciplinary Sciences
Scott Jasechko, Hansjorg Seybold, Debra Perrone, Ying Fan, James W. Kirchner
Summary: The study finds that nearly two-thirds of wells in the contiguous USA are located below nearby stream surfaces, indicating a potential for streamwater seepage into the subsurface. Factors such as dry climates, flat landscapes, and extensive groundwater pumping contribute to the prevalence of losing streams. This highlights the need for coordination between groundwater and surface water policies to address the issue of potential streamwater losses into underlying aquifers.
Article
Chemistry, Analytical
Sanne M. de Smit, Jelle J. H. Langedijk, Lennert C. A. van Haalen, Shih Hsuan Lin, Johannes H. Bitter, David P. B. T. B. Strik
Summary: We have developed a technique that uses microsensors to measure pH and H2 gradients during microbial electrosynthesis. The use of 3D electrodes in (bio)electrochemical systems can lead to gradients from the bulk conditions into the electrode, which significantly affect the electrode's performance. We have also measured local oxidation-reduction potential and electric field potential throughout the 3D porous electrodes. To overcome interference caused by the electric field, we have validated a method that corrects the pH measurements using the electric potential measured by another microsensor. This technique is useful for studying electrode design, reactor engineering, measuring gradients in electroactive biofilms, and flow dynamics in and around 3D porous electrodes of (bio)electrochemical systems.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Yanqiang Han, Zhilong Wang, Jinjin Li
Summary: A newly efficient approach based on neural network and fragment method is proposed for predicting the phase transition of solid crystal structures with high accuracy and low computational cost, offering a solution to the extreme calculation cost in high-pressure molecular crystal research.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Energy & Fuels
Junping Zhou, Kang Yang, Lei Zhou, Yongdong Jiang, Xuefu Xian, Chengpeng Zhang, Shifeng Tian, Maolin Fan, Zhaohui Lu
Summary: This study investigates the influence of sub/super-critical CO2-water exposure on the microstructure and mechanical properties of shale. The results show that CO2 exposure leads to a decrease in carbonate and clay content in shale, while altering pore structures and reducing the mechanical properties of the shale. Additionally, the study finds that greater alterations in the pore structure and mechanical properties are induced by supercritical CO2 compared to subcritical CO2, and these alterations are further enhanced by CO2-water exposure.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Review
Chemistry, Multidisciplinary
Minseok Kim, Jaekyung Yi, Seong-Hyeon Park, Sarah. S. S. Park
Summary: This review provides strategic insights into MOF-based electrocatalysts, discussing the introduction of notable active sites and material design principles. It also explores the viability of MOFs as alternatives to currently used electrocatalysts and establishes the future direction of MOF-based electrocatalysis research.
ADVANCED MATERIALS
(2023)
Article
Environmental Sciences
Teresa Aguirrezabala-Campano, Rodrigo Gonzalez-Valencia, Viani Garcia-Perez, Rocio Torres-Alvarado, Sunitha R. Pangala, Frederic Thalasso
Summary: This study provides a detailed characterization of the methane cycle in a tropical coastal lagoon and its tributary river in Mexico, showing that both the river and the lagoon are net sources of methane and carbon dioxide.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
Darya L. Gurina, Yury A. Budkov, Mikhail G. Kiselev
Summary: The study used molecular dynamics to investigate the impregnation of PMMA matrix with MFA in supercritical carbon dioxide, revealing that MFA is distributed in molecular form inside the polymer matrix.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Zhaodong Li, Wei Xiong, Bertrand J. Tremolet de Villers, Chao Wu, Ji Hao, Jeffrey L. Blackburn, Drazenka Svedruzic
Summary: This study investigated the electro-catalytic conversion of CO2 to acetate by acetogenic bacteria on semiconducting single-walled carbon nanotubes. The findings suggest direct extracellular electron transfer at the bio-nano interface and show that the availability of electrochemically produced H-2 does not limit the efficiency of CO2 electro-reduction. Isotope labeling studies demonstrated high Faradaic efficiency for CO2 electro-reduction at the SWCNT/bacterium interface.
Article
Limnology
Branimir Jaksic, Jelena Todorovic, Mihailo Jovanovic, Milos Bandjur, Djoko Bandjur, Ruby N. Ghosh
Summary: Dissolved oxygen is a key biogeochemical control in coastal systems, and this study explores the dominant drivers of its variability and how these drivers may change under future climate scenarios.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Entomology
Frances D. Duncan, Shirley A. Hanrahan
JOURNAL OF INSECT PHYSIOLOGY
(2018)
Article
Mathematical & Computational Biology
Peter Mpasho Mwamtobe, Simphiwe Mpumelelo Simelane, Shirley Abelman, Jean Michel Tchuenche
INTERNATIONAL JOURNAL OF BIOMATHEMATICS
(2018)
Article
Microbiology
Stephanie L. Schnorr, Courtney A. Hofman, Shandukani R. Netshifhefhe, Frances D. Duncan, Tanvi P. Honap, Julie Lesnik, Cecil M. Lewis
Article
Infectious Diseases
Ashley Burke, Yael Dahan-Moss, Frances Duncan, Bheki Qwabe, Maureen Coetzee, Lizette Koekemoer, Basil Brooke
Article
Mathematical & Computational Biology
S. M. Simelane, P. M. Mwamtobe, S. Abelman, J. M. Tchuenche
ACTA BIOTHEORETICA
(2020)
Article
Entomology
Ashley M. Burke, Basil D. Brooke, Frances D. Duncan
JOURNAL OF INSECT PHYSIOLOGY
(2019)
Article
Ecology
Shandukani R. Netshifhefhe, Frances D. Duncan, Ednah C. Kunjeku
AFRICAN JOURNAL OF ECOLOGY
(2020)
Article
Engineering, Multidisciplinary
J. N. Kouagou, P. G. Dlamini, S. M. Simelane
ALEXANDRIA ENGINEERING JOURNAL
(2020)
Article
Materials Science, Multidisciplinary
S. M. Simelane, P. G. Dlamini
Summary: This manuscript presents a nonlinear fractional order Hepatitis B virus (HBV) model with a saturated incidence, using Caputo fractional derivatives to define model governing equations and exploring dynamics through numerical solutions. The model's basic properties are discussed, dynamics are described based on the reproductive number R-0, and stability of equilibrium points is determined using the fractional Routh-Hurwitz stability criterion. The results highlight the importance of fractional order in modeling HBV transmission dynamics and the significance of including memory effects for a more appropriate and insightful study.
RESULTS IN PHYSICS
(2021)
Article
Agriculture, Multidisciplinary
S. R. Netshifhefhe, F. D. Duncan
Summary: The edible Macrotermes termite species in the Vhembe District of South Africa's Limpopo Province are important for food security and livelihoods. This study examined the nutritional composition of two commonly consumed Macrotermes species, finding that they have high protein and mineral content that could contribute to human health improvements.
JOURNAL OF INSECTS AS FOOD AND FEED
(2022)
Article
Entomology
Frances D. Duncan
Summary: The respiratory physiology of three diurnal ultraxerophilous darkling beetles in the Namib Desert was investigated, revealing differences in respiration mechanics related to the ecology of the species. The largest beetle species used evaporative cooling to prevent over-heating, while the smaller beetles minimized respiratory water loss and conserved body water to stay active longer.
Article
Multidisciplinary Sciences
James Malele, Phumlani Dlamini, Simphiwe Simelane
Summary: This study applies a high-order compact finite difference method to solve boundary value problems with Robin boundary conditions. New higher-order finite difference schemes for approximating Robin boundary conditions are developed. Six examples are used to test and compare the method's applicability and performance. The results demonstrate that the method produces highly accurate results.
Article
Mechanics
Phumlani Dlamini, Simphiwe Simelane
Summary: In this paper, the multidomain spectral relaxation method was implemented to study high-dimensional chaos, specifically focusing on the nine-dimensional Lorenz system. By decomposing the main interval into subdomains, the multidomain approach significantly improves the accuracy and efficiency of the numerical method for chaotic systems.
JOURNAL OF APPLIED AND COMPUTATIONAL MECHANICS
(2021)
Article
Entomology
S. R. Netshifhefhe, E. C. Kunjeku, D. Visser, F. M. Madzivhe, F. D. Duncan
AFRICAN ENTOMOLOGY
(2018)
Article
Multidisciplinary Sciences
Shandukani R. Netshifhefhe, Ednah C. Kunjeku, Frances D. Duncan
SOUTH AFRICAN JOURNAL OF SCIENCE
(2018)
