A Field-Validated Model for In Situ Transport of Polymer-Stabilized nZVI and Implications for Subsurface Injection

2013 ◽  
Vol 47 (13) ◽  
pp. 7332-7340 ◽  
Author(s):  
Magdalena M. Krol ◽  
Andrew J. Oleniuk ◽  
Chris M. Kocur ◽  
Brent E. Sleep ◽  
Peter Bennett ◽  
...  
Keyword(s):  
Subsurface Injection ◽  
Polymer Stabilized

In-situ sequestration of perfluoroalkyl substances using polymer-stabilized ion exchange resin

2022 ◽  
Vol 422 ◽  
pp. 126960
Author(s):  
Chen Liu ◽  
Jenna Chu ◽  
Natalie L. Cápiro ◽  
John D. Fortner ◽  
Kurt D. Pennell
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Perfluoroalkyl Substances ◽  
Polymer Stabilized

scholarly journals Pitch Gradation by Ion-Dragging Effect in Polymer-Stabilized Cholesteric Liquid Crystal Reflector Device

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 96 ◽  
Author(s):  
Xiaowen Hu ◽  
Weijie Zeng ◽  
Xinmin Zhang ◽  
Kai Wang ◽  
Xiaoling Liao ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Ex Situ ◽  
Polymerization Process ◽  
Heat Radiation ◽  
Smart Window ◽  
Dc Bias ◽  
Polymer Stabilized ◽  
Bandwidth Broadening

An IR reflector based on polymer-stabilized cholesteric liquid crystal (PSCLC) can selectively tune IR light reflection for smart window application. Broadening the reflection bandwidth to block more IR heat radiation requires the expansion of the pitch distribution in the PSCLC. Traditional attempts using ex situ direct current (DC) bias upon an already polymerized PSCLC reflector usually require a sustaining potential difference holding the pitch gradient of the reflector. Removing the DC bias will lead to a reflect bandwidth comeback. Here, we have developed an in situ DC curing strategy to realize an irreversible reflect bandwidth broadening. Briefly, a DC bias was used to drive the redistribution of impurity cations, which can be captured by the ester group of oligomers, during the photopolymerization. During the slow polymerization process, such trapped cations will drag the oligomers towards the cathode and compress the pitch length near the cathode before the oligomers form the long polymer chain. Consequently, a frozen pitch gradient by such an in-situ-electric-field-assisted dynamic ion-dragging effect leads to the formation of a pitch gradient along the electrical field direction. After removing the DC bias, the as-cured polymer is observed to have frozen such a gradient pitch feature without recoverable change. As a result, the PSCLC reflector exhibits steady bandwidth broadening of 480 nm in the IR region, which provides the potential for saving energy as a smart window.

In situ formation of magnetic–luminescent, bi-functional, polymer-stabilized cerium sulfide nanoparticles

2012 ◽  
Vol 109 (3) ◽  
pp. 607-611 ◽  
Author(s):  
Kaushik Mallick ◽  
Michael Witcomb ◽  
André Strydom
Keyword(s):  
Functional Polymer ◽  
In Situ Formation ◽  
Polymer Stabilized

In Situ Sequestration of Perfluoroalkyl Substances Using Polymer-Stabilized Powdered Activated Carbon

2020 ◽  
Vol 54 (11) ◽  
pp. 6929-6936
Author(s):  
Chen Liu ◽  
James Hatton ◽  
William A. Arnold ◽  
Matt F. Simcik ◽  
Kurt D. Pennell
Keyword(s):  
Activated Carbon ◽  
Powdered Activated Carbon ◽  
Perfluoroalkyl Substances ◽  
Polymer Stabilized

scholarly journals In Situ Non-Destructive Temporal Measurements of the Rhizosphere Microbiome ‘Hot-Spots’ Using Metaproteomics

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2248
Author(s):  
Richard Allen White ◽  
Joshua Rosnow ◽  
Paul D. Piehowski ◽  
Colin J. Brislawn ◽  
James J. Moran
Keyword(s):  
Spatial Organization ◽  
Global Scale ◽  
Small Scale ◽  
Microbial Composition ◽  
Earth’S Climate ◽  
And Function ◽  
Subsurface Injection ◽  
Non Destructive ◽  
Microbial Hotspots

Rhizosphere arguably embodies the most diverse microbial ecosystem on the planet, yet it is largely a functional ‘black box’ of belowground plant-microbiome interactions. The rhizosphere is the primary site of entry for subsurface injection of fixed carbon (C) into soil with impacts on local to global scale C biogeochemistry and ultimately Earth’s climate. While spatial organization of rhizosphere is central to its function, small scale and steep microbial and geochemical gradients within this dynamic region make it easily disrupted by sampling. The significant challenge presented by sampling blocks elucidation of discreet functions, drivers, and interactions within rhizosphere ecosystems. Here, we describe a non-destructive sampling method linked to metaproteomic analysis in order to measure temporal shifts in the microbial composition and function of rhizosphere. A robust, non-destructive method of sampling microbial hotspots within rhizosphere provides an unperturbed window into the elusive functional interactome of this system over time and space.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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