keyword
MENU ▼
Read by QxMD icon Read
search

Volume kinetics

keyword
https://www.readbyqxmd.com/read/29149553/cobalt-sulfide-quantum-dots-embedded-n-s-doped-carbon-nanosheets-with-superior-reversibility-and-rate-capability-for-sodium-ion-batteries
#1
Qiubo Guo, Yifan Ma, Tingting Chen, Qiuying Xia, Mei Yang, Hui Xia, Yan Yu
Metal sulfides are promising anode materials for sodium-ion batteries due to their large specific capacities. The practical application of metal sulfides in sodium-ion batteries, however, are still limited due to their large volume expansion, poor cycling stability, and sluggish electrode kinetics. In this work, a unique two-dimensional heterostructure of CoSx (CoS and Co9S8) quantum dots embedded N/S-doped carbon nanosheets (CoSx@NSC) is prepared by a facile sol-gel method. The CoSx quantum dots are in-situ formed within ultrafine carbon nanosheets without further sulfidation, thus resulting in ultrafine CoSx particle size and embedded heterostructure...
November 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/29149065/calcined-chitosan-supported-layered-double-hydroxides-an-efficient-and-recyclable-adsorbent-for-the-removal-of-fluoride-from-an-aqueous-solution
#2
Hanjun Wu, Huali Zhang, Qingxue Yang, Dongsheng Wang, Weijun Zhang, Xiaofang Yang
In this work, calcined chitosan-supported layered double hydroxides (CSLDO) were synthesized through a co-precipitation method that restrained the particles' aggregation of LDHs and exhibited huge specific surface areas, which can enhance the fluoride adsorption capacity. CSLDOs were characterized by physical and chemical methods and used for fluoride adsorption in an aqueous solution. The results indicated that the nanoparticles were constructed first and then assembled to form a porous and layered structure, and chitosan-supported layered double hydroxides (CSLDHs) calcined at 400 °C (CSLDO400) showed the highest specific surface area of 116...
November 17, 2017: Materials
https://www.readbyqxmd.com/read/29148130/a-pseudo-one-compartment-model-of-phosphorus-kinetics-during-hemodialysis-further-supporting-evidence
#3
John K Leypoldt, Baris U Agar, Alfred K Cheung, Angelito A Bernardo
A pseudo-one compartment model has been proposed to describe phosphorus kinetics during hemodialysis and the immediate post-dialysis period. This model assumes that phosphorus mobilization from tissues is proportional to the difference between the pre-dialysis serum concentration (a constant) and the instantaneous serum concentration. The current study is exploratory and evaluated the ability of a pseudo-one compartment model to describe the kinetics of phosphorus during two short hemodialysis treatments separated by a 60-min inter-treatment period without dialysis; the latter is the post-dialysis rebound period for the first short hemodialysis treatment...
November 2017: Artificial Organs
https://www.readbyqxmd.com/read/29141440/explaining-the-t-v-dependent-dynamics-of-glass-forming-liquids-the-cooperative-free-volume-model-tested-against-new-simulation-results
#4
Ronald P White, Jane E G Lipson
In this article, we derive a rate model, the "cooperative free volume" (CFV) model, to explain relaxation dynamics in terms of a system's free volume, Vfree, and its temperature, T, over widely varied pressure dependent conditions. In the CFV model, the rate a molecule moves a distance on the order of its own size is dependent on the cooperation of surrounding molecules to open up enough free space. To test CFV, we have generated extensive T,V dependent simulation data for structural relaxation times, τ, on a Kob and Andersen type Lennard-Jones (KA-LJ) fluid...
November 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29140092/determinants-and-expansion-of-specificity-in-a-trichothecene-udp-glucosyltransferase-from-oryza-sativa
#5
Karl M Wetterhorn, Kaitlyn Gabardi, Herbert Michlmayr, Alexandra Malachova, Mark Busman, Susan Patricia McCormick, Franz Berthiller, Gerhard Adam, Ivan Rayment
Family 1 UDP-glycosyltransferases in plants (UGTs) primarily form glucose conjugates of small molecules and, besides other functions, play a role in detoxification of xenobiotics. Indeed, overexpression of a barley UGT in wheat has been shown to control Fusarium head blight, where this is a plant disease of global significance that leads to reduced crop yields and contamination with trichothecene mycotoxins such as deoxynivalenol (DON), T-2 toxin and many other structural variants. The UGT Os79 from rice has emerged as a promising candidate for inactivation of mycotoxins on account of its ability to glycosylate DON, nivalenol and hydrolyzed T-2 toxin (HT-2)...
November 15, 2017: Biochemistry
https://www.readbyqxmd.com/read/29139496/exploring-the-science-of-thinking-independently-together-faraday-discussion-volume-204-complex-molecular-surfaces-and-interfaces-sheffield-uk-july-2017
#6
M Samperi, B E Hirsch, Y A Diaz Fernandez
The 2017 Faraday Discussion on Complex Molecular Surfaces and Interfaces brought together theoreticians and experimentalists from both physical and chemical backgrounds to discuss the relevant applied and fundamental research topics within the broader field of chemical surface analysis and characterization. Main discussion topics from the meeting included the importance of "disordered" two-dimensional (2D) molecular structures and the utility of kinetically trapped states. An emerging need for new experimental tools to address dynamics and kinetic pathways involved in self-assembled systems, as well as the future prospects and current limitations of in silico studies were also discussed...
November 15, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29132123/a-comparative-study-of-electro-dewatering-process-performance-for-activated-and-digested-wastewater-sludge
#7
Akrama Mahmoud, Andrew F A Hoadley, Morgane Citeau, Jean Michel Sorbet, Gelade Olivier, Jean Vaxelaire, Jérémy Olivier
Electro-dewatering (EDW) is an alternative emerging and energy-efficient technology that provides improved liquid/solids separations in the dewatering of wastewater sludge. The EDW technology is not only an innovative dewatering method for significantly reducing the volume of wastewater sludge before re-utilization or disposal, but is also a promising emerging method which may potentially be used for decontamination purposes. In this study, the influence of the sludge properties (e.g. electrical conductivity, zeta potential, specific cake resistance, among others) on their mechanical and electrical behaviour in terms of dewaterability and electro-dewaterability, the applied current (current density from 20 to 80 A/m(2)), and filter cloth position relative to the electrode was investigated...
November 10, 2017: Water Research
https://www.readbyqxmd.com/read/29131632/spontaneous-microstructure-formation-at-water-paraffin-oil-interfaces
#8
Murielle Schmitt, Ritu Toor, Renaud Denoyel, Mickaël Antoni
An experimental investigation of spontaneous emulsification is proposed with water drops pendant in a paraffin oil (PO) solution loaded with a surfactant (SPAN80). Optical microscopy in transmission mode is employed for high spatial resolution image recording. The kinetics of spontaneous emulsification is studied. It is shown to generate a darkening of the drops due to interface modification with a characteristic time that depends upon the SPAN80 concentration. For low concentrations, spontaneous emulsification is slow and produces micrometer sized droplets while for large concentrations, it is fast and bush-like microstructures are observed...
November 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29127610/pvp-va64-as-a-novel-release-modifier-for-sustained-release-mini-matrices-prepared-via-hot-melt-extrusion
#9
Yongcheng Li, Ming Lu, Chuanbin Wu
The purpose of this study was to explore poly(vinylpyrrolidone-co-vinyl acetate) (PVP VA64) as a novel release-modifier to tailor the drug release from ethylcellulose (EC)-based mini-matrices prepared via hot melt extrusion (HME). Quetiapine fumarate (QF) was selected as model drug. QF/EC/PVP VA64 mini-matrices were extruded with 30% drug loading. The physical state of QF in extruded mini-matrices was characterized using differential scanning calorimetry, X-ray powder diffraction, and confocal Raman microscopy...
November 10, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/29127348/large-area-few-layer-graphene-with-scalable-preparation-from-waste-biomass-for-high-performance-supercapacitor
#10
Taniya Purkait, Guneet Singh, Mandeep Singh, Dinesh Kumar, Ramendra Sundar Dey
Carbonaceous materials with high surface area and a sheet-like structure promote fast ion-transport kinetics, making them an ideal choice to be used in supercapacitors. Few-layer graphene (FLG)-like nanosheets with abundance of micro as well as mesopores are achieved via mechanical exfoliation method from an agricultural waste biomass: peanut shell (PS). A well-known elementary method of probe-sonication, for the achievement of FLG sheets from renewable sources, is introduced in this study for the very first time...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29127067/understanding-the-structural-drivers-governing-glass-water-interactions-in-borosilicate-based-model-bioactive-glasses
#11
Nicholas Stone-Weiss, Eric M Pierce, Randall E Youngman, Ozgur Gulbiten, Nicholas J Smith, Jincheng Du, Ashutosh Goel
The past decade has witnessed a significant upsurge in the development of borate and borosilicate based resorbable bioactive glasses owing to their faster degradation rate in comparison to their silicate counterparts. However, due to our lack of understanding about the fundamental science governing the aqueous corrosion of these glasses, most of the borate/borosilicate based bioactive glasses reported in the literature have been designed by "trial-and-error" approach. With an ever-increasing demand for their application in treating a broad spectrum of non-skeletal health problems, it is becoming increasingly difficult to design advanced glass formulations using the same conventional approach...
November 7, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29123436/development-and-retrospective-clinical-assessment-of-a-patient-specific-closed-form-integro-differential-equation-model-of-plasma-dilution
#12
Glen Atlas, John K-J Li, Shawn Amin, Robert G Hahn
A closed-form integro-differential equation (IDE) model of plasma dilution (PD) has been derived which represents both the intravenous (IV) infusion of crystalloid and the postinfusion period. Specifically, PD is mathematically represented using a combination of constant ratio, differential, and integral components. Furthermore, this model has successfully been applied to preexisting data, from a prior human study, in which crystalloid was infused for a period of 30 minutes at the beginning of thyroid surgery...
2017: Biomedical Engineering and Computational Biology
https://www.readbyqxmd.com/read/29122363/clustering-of-multi-parametric-functional-imaging-to-identify-high-risk-subvolumes-in-non-small-cell-lung-cancer
#13
Aniek J G Even, Bart Reymen, Matthew D La Fontaine, Marco Das, Felix M Mottaghy, José S A Belderbos, Dirk De Ruysscher, Philippe Lambin, Wouter van Elmpt
BACKGROUND AND PURPOSE: We aimed to identify tumour subregions with characteristic phenotypes based on pre-treatment multi-parametric functional imaging and correlate these subregions to treatment outcome. The subregions were created using imaging of metabolic activity (FDG-PET/CT), hypoxia (HX4-PET/CT) and tumour vasculature (DCE-CT). MATERIALS AND METHODS: 36 non-small cell lung cancer (NSCLC) patients underwent functional imaging prior to radical radiotherapy...
November 6, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29121649/spatiotemporal-dynamics-of-hsv-genome-nuclear-entry-and-compaction-state-transitions-using-bioorthogonal-chemistry-and-super-resolution-microscopy
#14
Eiki Sekine, Nora Schmidt, David Gaboriau, Peter O'Hare
We investigated the spatiotemporal dynamics of HSV genome transport during the initiation of infection using viruses containing bioorthogonal traceable precursors incorporated into their genomes (HSVEdC). In vitro assays revealed a structural alteration in the capsid induced upon HSVEdC binding to solid supports that allowed coupling to external capture agents and demonstrated that the vast majority of individual virions contained bioorthogonally-tagged genomes. Using HSVEdC in vivo we reveal novel aspects of the kinetics, localisation, mechanistic entry requirements and morphological transitions of infecting genomes...
November 9, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29120183/thermoresponsive-surface-grafted-gels-controlling-the-bulk-volume-change-properties-by-surface-localized-polymer-grafting-with-various-densities
#15
Ko Matsukawa, Tsukuru Masuda, Youn Soo Kim, Aya Mizutani Akimoto, Ryo Yoshida
We prepared poly(N-isopropylacrylamide-r-N-3-(aminopropyl)methacrylamide) (poly(NIPAAm-r-NAPMAm)) gels with poly NIPAAm (PNIPAAm) grafted only in the surface region (so-called thermoresponsive "surface-grafted gels") with various graft densities, and investigated the effect of the graft density on the bulk properties, such as shrinking and swelling, in response to temperature changes. Initiators for atom transfer radical polymerization (ATRP) and structurally analogous compounds were introduced at certain ratios to the surface regions of the gels, and a subsequent activator regenerated by electron transfer ATRP of NIPAAm was conducted in aqueous media...
November 9, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29116791/soluble-oligomeric-nucleants-simulations-of-chain-length-binding-strength-and-volume-fraction-effects
#16
Geoffrey G Poon, Tobias Lemke, Christine Peter, Valeria Molinero, Baron Peters
Recent theories and simulations suggest that molecular additives can bind to the surfaces of nuclei, lower the surface energy, and accelerate nucleation. Experiments have shown that oligomeric and polymeric additives can also modify nucleation rates of proteins, ice, and minerals; however, general design principles for oligomeric or polymeric promoters do not yet exist. Here we investigate oligomeric additives for which each segment of the oligomer can bind to surfaces of nuclei. We use semigrand canonical Monte Carlo simulations in a Potts lattice gas model to study the effects of oligomer chain length, volume fraction, and binding strength...
November 15, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29116263/magnetic-sulfur-doped-porous-carbon-for-preconcentration-of-trace-mercury-in-environmental-water-prior-to-icp-ms-detection
#17
Chuyu Peng, Man He, Beibei Chen, Lijin Huang, Bin Hu
A novel magnetic sulfur-doped porous carbon (MSPC) was fabricated via a simple one-step carbonization of a mixture of sucrose, basic magnesium sulfate whiskers and Fe3O4@SiO2 nanoparticles. Due to the high S content, the prepared MSPC possessed high adsorption capacity for Hg(2+) (343 mg g(-1)) with good selectivity. Based on this, a method coupling magnetic solid phase extraction (MSPE) with inductively coupled plasma mass spectrometry (ICP-MS) was developed for the determination of trace Hg(2+) in environmental water samples...
November 8, 2017: Analyst
https://www.readbyqxmd.com/read/29114181/kinetic-modelling-of-infection-tracers-18-f-fdg-68-ga-ga-citrate-11-c-methionine-and-11-c-donepezil-in-a-porcine-osteomyelitis-model
#18
Lars Jødal, Svend B Jensen, Ole L Nielsen, Pia Afzelius, Per Borghammer, Aage K O Alstrup, Søren B Hansen
Introduction: Positron emission tomography (PET) is increasingly applied for infection imaging using [(18)F]FDG as tracer, but uptake is unspecific. The present study compares the kinetics of [(18)F]FDG and three other PET tracers with relevance for infection imaging. Methods: A juvenile porcine osteomyelitis model was used. Eleven pigs underwent PET/CT with 60-minute dynamic PET imaging of [(18)F]FDG, [(68)Ga]Ga-citrate, [(11)C]methionine, and/or [(11)C]donepezil, along with blood sampling...
2017: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29107048/beyond-q1-q2-the-impact-of-manufacturing-conditions-and-test-methods-on-drug-release-from-plga-based-microparticle-depot-formulations
#19
John Garner, Sarah Skidmore, Haesun Park, Kinam Park, Stephanie Choi, Yan Wang
Drug-loaded polymeric microparticles have been used as long-acting injectable (LAI) depot formulations. To obtain FDA approval, a generic LAI depot product needs to be qualitatively (Q1) and quantitatively (Q2) the same in terms of inactive ingredients as its reference listed drug (RLD). However, Q1/Q2 sameness as the RLD does not guarantee the same in vitro drug release profile and in vivo performance, especially when the manufacturing methods are different. There is little consensus on how the in vitro testing needs to be done to examine the release profiles of LAI depot formulations...
October 26, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29106751/fast-na-k-pump-driven-steady-state-transcytolemmal-water-exchange-in-neuronal-tissue-a-study-of-rat-brain-cortical-cultures
#20
Ruiliang Bai, Charles S Springer, Dietmar Plenz, Peter J Basser
PURPOSE: Water homeostasis and transport play important roles in brain function (e.g., ion homeostasis, neuronal excitability, cell volume regulation, etc.). However, specific mechanisms of water transport across cell membranes in neuronal tissue have not been completely elaborated. METHODS: The kinetics of transcytolemmal water exchange were measured in neuronal tissue using simultaneous, real-time fluorescence and nuclear magnetic resonance (NMR) measurements of perfused, active brain organotypic cortical cultures...
November 6, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
keyword
keyword
40355
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"