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Results for “method of cells”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 73 records · Page 4
All sourcesNASA NTRSDOE OSTI
DOE OSTI2023

Host cells and methods for producing isopentenol from mevalonate

The present invention provides for a genetically modified host cell capable of producing isopentenol and/or 3-methyl-3-butenol, comprising (a) an increased expression of phosphomevalonate decarboxylase (PMD) (b) an increased expression of a phosphatase capable of converting isopentenol into 3-methyl-3-butenol, (c) optionally the genetically modified host cell does not express, or has a decreased expression of one or more of NudB, phosphomevalonate kinase (PMK), and/or PMD, and (d) optionally one or more further enzymes capable of converting isopentenol and/or 3-methyl-3-butenol into a third compound, such as isoprene.

Lee, Taek Soon↗
DOE OSTI2023

Genetically modified bacterial cells and methods useful for producing indigoidine

The present invention provides for a genetically modified bacterial host cell capable of producing indigoidine, wherein the host cell comprises a non-ribosomal peptide synthetase (NRPS) that converts glutamine to indigoidine, and the bacterial host cell is reduced in its expression of one or more of the sixteen indicated enzymes.

Eng, Thomas T.↗
DOE OSTI2020

Microfluidic platform for multiplexed detection in single cells and methods thereof

The present invention relates to a microfluidic device and platform configured to conduct multiplexed analysis within the device. In particular, the device allows multiple targets to be detected on a single-cell level. Also provided are methods of performing multiplexed analyses to detect one or more target nucleic acids, proteins, and post-translational modifications.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2024

Host cells and methods for producing hydroxytyrosol

The present invention provides for a composition comprising: (a) a first host cell capable of producing L-DOPA; and (b) a modified host cell is capable of converting L-DOPA into hydroxytyrosol (HTy); wherein any one or both of the first host cell and second host cell is a genetically modified host cell.

Yoshida, Erika↗
DOE OSTI2021

Cross Section Generation Capability in Griffin

The Griffin code is a Multiphysics Object-Oriented Simulation Environment (MOOSE) based reactor multiphysics analysis application jointly developed by Idaho National Laboratory and Argonne National Laboratory. The code includes a variety of steady-state solvers for fixed-source, k-eigenvalue, adjoint, and subcritical multiplication, as well as transient solvers for point-kinetics, improved quasi-static, and spatial dynamics. The code reads multigroup cross sections in the ISOXML format generated from external deterministic or Monte Carlo cross section generation codes. The implementation of the cross section generation capability in Griffin was initiated last year by plugging in the cross section application programming interface (CSAPI) and reviewing the methodologies for treating particulate fuels. The focus this year was on improving the CSAPI integration and implementing advanced self-shielding methods for applications to advanced reactor problems with TRISO fuels. First, the process for cross section library generation was updated to accurately and rigorously produce isotopic cross section data. Second, the equivalent Dancoff factor cell method performing slowing down calculations on the fly for the resonance treatment was implemented in CSAPI to improve the accuracy of effective multigroup cross sections in the resonance energy range. Third, the iterative local spatial self-shielding method was implemented under the calculation framework of the equivalent Dancoff factor cell method to accurately deal with the double heterogeneity effect of particulate fuel. The updated CSAPI with the advanced self-shielding methods, together with the cross section libraries generated based on the improved process, were tested for pin-cell, unit-cell, and fuel assembly problems with various resonance self-shielding conditions based on very high temperature reactor, high temperature test reactor, and Empire benchmark cores, indicating that the updated CSAPI in Griffin is able to produce multigroup cross sections accurately and efficiently. We also showed that the methodology worked well for pebble bed fuel from HTR-10, but the capability still needs to be fully integrated into CSAPI. In the future, further benchmark tests will be performed for various thermal reactor core problems, including particulate fuel-based pebble bed reactors.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
DOE OSTI2020

Vitreous solid electrolyte sheets of Li ion conducting sulfur-based glass and associated structures, cells and methods

A lithium ion-conductive solid electrolyte including a freestanding inorganic vitreous sheet of sulfide-based lithium ion conducting glass is capable of high performance in a lithium metal battery by providing a high degree of lithium ion conductivity while being highly resistant to the initiation and/or propagation of lithium dendrites. Such an electrolyte is also itself manufacturable, and readily adaptable for battery cell and cell component manufacture, in a cost-effective, scalable manner.

Visco, Steven J.↗
DOE OSTI2023

Vitreous solid electrolyte sheets of Li ion conducting sulfur-based glass and associated structures, cells and methods

A lithium ion-conductive solid electrolyte including a freestanding inorganic vitreous sheet of sulfide-based lithium ion conducting glass is capable of high performance in a lithium metal battery by providing a high degree of lithium ion conductivity while being highly resistant to the initiation and/or propagation of lithium dendrites. Such an electrolyte is also itself manufacturable, and readily adaptable for battery cell and cell component manufacture, in a cost-effective, scalable manner.

Visco, Steven J.↗
DOE OSTI2024

Vitreous solid electrolyte sheets of Li ion conducting sulfur-based glass and associated structures, cells and methods

A lithium ion-conductive solid electrolyte including a freestanding inorganic vitreous sheet of sulfide-based lithium ion conducting glass is capable of high performance in a lithium metal battery by providing a high degree of lithium ion conductivity while being highly resistant to the initiation and/or propagation of lithium dendrites. Such an electrolyte is also itself manufacturable, and readily adaptable for battery cell and cell component manufacture, in a cost-effective, scalable manner.

Visco, Steven J.↗
DOE OSTI2020

Standalone sulfide based lithium ion-conducting glass solid electrolyte and associated structures, cells and methods

A standalone lithium ion-conductive solid electrolyte including a freestanding inorganic vitreous sheet of sulfide-based lithium ion conducting glass is capable of high performance in a lithium metal battery by providing a high degree of lithium ion conductivity while being highly resistant to the initiation and/or propagation of lithium dendrites. Such an electrolyte is also itself manufacturable, and readily adaptable for battery cell and cell component manufacture, in a cost-effective, scalable manner.

Visco, Steven J.↗
DOE OSTI2023

Standalone sulfide based lithium ion-conducting glass solid electrolyte and associated structures, cells and methods

A standalone lithium ion-conductive solid electrolyte including a freestanding inorganic vitreous sheet of sulfide-based lithium ion conducting glass is capable of high performance in a lithium metal battery by providing a high degree of lithium ion conductivity while being highly resistant to the initiation and/or propagation of lithium dendrites. Such an electrolyte is also itself manufacturable, and readily adaptable for battery cell and cell component manufacture, in a cost-effective, scalable manner.

Visco, Steven J.↗
DOE OSTI2022

Heat transfer in directly-irradiated high-temperature solid–gas flows laden with polydisperse particles

Heat transfer in directly-irradiated high-temperature solid–gas flows laden with polydisperse particles is investigated using a novel transient three-dimensional computational fluid dynamics model. The model couples particle–gas hydrodynamics of solid–gas flows laden with polydisperse particles, radiative heat transfer in non-grey absorbing, emitting and anisotropically-scattering multi-component participating media, conduction heat transfer in the gas phase, and interfacial convection heat transfer. The multiphase particle-in-cell method is used to predict high-fidelity solid–gas flow characteristics, such as the local discrete particle size distribution, with increased computational efficiency by combining the advantages of both Eulerian and Lagrangian methods. The multi-component radiative transfer model is implemented using an advanced collision-based Monte Carlo ray-tracing method. The number of the prescribed discrete particle components is found to be the key parameter affecting the computational accuracy and efficiency, which primarily depends on the size distribution of the particles. For the model particle–gas flow featuring free-falling Gamma-distributed ceramic particles exposed to concentrated solar irradiation, the particle volume fraction, radiative, fluid flow and thermal characteristics appear to converge with the increasing number of the discrete particle components. Five particle components are sufficient to obtain physically meaningful results. A further increase in the number of the particle components only slightly increases the accuracy of the numerical predictions at the expense of a rapidly increasing computational time. For five particle components, the particle vertical velocity at the receiver exit for particles with the diameter of 43.4 μm is 57% of that for the particles with the diameter of 202.8 μm. The temperatures of these two particle components increase from the initial ambient values by factors of 2 and 1.2, respectively, during the simulation time. In conclusion, the model developed allows for increased fidelity of particle–gas flow simulations with significant radiative effects.

97 MATHEMATICS AND COMPUTING↗
DOE OSTI2020

Host cells and methods using a repressor polypeptide and an inducible promoter for gene expression

The present invention provides for a system comprising (a) a first nucleic acid comprising a nucleotide sequence encoding a nucleotide sequence of interest operatively linked to a promoter comprising a repressor polypeptide binding site, and (b) a second nucleic acid comprising a nucleotide sequence encoding a repressor polypeptide having at least 70% amino acid identity with EilR, SmvR, KmrR, RcdA, or QacR; wherein expression of the nucleotide sequence of interest from the promoter is induced by the presence of a hydrophobic inducer, such as a hydrophobic cation inducer, such as a triarylmethane, acridine, phenazine, phenothiazine, or xanthene.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2020

Nanocomposite coatings for perovskite solar cells and methods of making the same

An aspect of the present disclosure is a method that includes, in a first mixture that includes a metal alkoxide and water, reacting at least a portion of the metal alkoxide and at least a portion of the water to form a second mixture that includes a solid metal oxide phase dispersed in the second mixture, applying the second mixture onto a surface of a device that includes an intervening layer adjacent to a perovskite layer such that the intervening layer is between the second mixture and perovskite layer, and treating the second mixture, such that the solid metal oxide phase is transformed to a first solid metal oxide layer such that the intervening layer is positioned between the first solid metal oxide layer and the perovskite layer.

Zhu, Kai↗
DOE OSTI2021

Light scattering structures for thin-film solar cells and methods of making the same

The present disclosure relates to a method that includes contacting a surface of a first layer that includes a Group III element and a Group V element with a gas that includes HCl, where the first layer is positioned in thermal contact with a wafer positioned in a chamber of a reactor, and the contacting results in a roughening of the surface.

Ptak, Aaron Joseph↗
DOE OSTI2022

Host cells and methods using a repressor polypeptide and an inducible promoter for gene expression

The present invention provides for a system comprising (a) a first nucleic acid comprising a nucleotide sequence encoding a nucleotide sequence of interest operatively linked to a promoter comprising a repressor polypeptide binding site, and (b) a second nucleic acid comprising a nucleotide sequence encoding a repressor polypeptide having at least 70% amino acid identity with EilR, SmvR, KmrR, RcdA, or QacR; wherein expression of the nucleotide sequence of interest from the promoter is induced by the presence of a hydrophobic inducer, such as a hydrophobic cation inducer, such as a triarylmethane, acridine, phenazine, phenothiazine, or xanthene.

Ruegg, Thomas L.↗
DOE OSTI2023

Lead-lead oxide-carbon nanocomposite for energy storage cells and method of preparation

Lead/lead oxide/carbon (“Pb—O—C”) nanocomposite materials are useful as electrode active materials for electrodes in lithium and sodium batteries. A Pb—O—C nanocomposite as described herein comprises Pb and lead oxide nanoparticles homogeneously dispersed in a carbon nanoparticle matrix. In the nanocomposite, the other element or elements (e.g., transition metals, Al, Si, P, Sn, Sb, and Bi) can be alloyed with the Pb nanoparticles, incorporated as a mixed oxide with the lead oxide nanoparticles, or can be present as distinct elemental or oxide nanoparticles within the carbon nanoparticle matrix. In some embodiments, the additional element or elements are present as alloys and mixed oxides with the Pb materials and as distinct elemental and/or oxide nanoparticles. In a preferred embodiment the Pb nanoparticles surface is oxidized to lead oxide thus creating a shell on core nanostructure.

Johnson, Christopher S.↗
DOE OSTI2023

Apparatus and method for lithium-ion cells

A method including supporting a plurality of lithium-ion cells disposed within respective isolation chambers of a thermally insulating cell support structure, and disposing a thermal dissipation member between a housing and the plurality of lithium-ion cells so as to collectively form a heat sink with each lithium-ion cell of the plurality of lithium-ion cells and the housing, where the plurality of lithium-ion cells are disposed within the housing, the thermal dissipation member closes a respective open end of each of the respective isolation chambers to physically isolate each isolation chamber from each other isolation chamber, and the thermal dissipation member is thermally coupled to the plurality of lithium-ion cells so as to dissipate thermal energy from one of the plurality of lithium-ion cells to the housing and at least another of the plurality of lithium-ion cells, through the thermal dissipation member.

Day, Gregory R.↗