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At least 595 records · Page 33
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ac3Tm by Materials Project

Ac3Tm is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Tm atoms to form AcAc8Tm4 cuboctahedra that share corners with twelve equivalent AcAc8Tm4 cuboctahedra, edges with eight equivalent TmAc12 cuboctahedra, edges with sixteen AcAc8Tm4 cuboctahedra, faces with four equivalent TmAc12 cuboctahedra, and faces with fourteen AcAc8Tm4 cuboctahedra. There are four shorter (3.86 Å) and four longer (3.88 Å) Ac–Ac bond lengths. All Ac–Tm bond lengths are 3.86 Å. In the second Ac site, Ac is bonded to eight equivalent Ac and four equivalent Tm atoms to form AcAc8Tm4 cuboctahedra that share corners with four equivalent AcAc8Tm4 cuboctahedra, corners with eight equivalent TmAc12 cuboctahedra, edges with twenty-four AcAc8Tm4 cuboctahedra, faces with six equivalent TmAc12 cuboctahedra, and faces with twelve AcAc8Tm4 cuboctahedra. All Ac–Tm bond lengths are 3.88 Å. Tm is bonded to twelve Ac atoms to form TmAc12 cuboctahedra that share corners with four equivalent TmAc12 cuboctahedra, corners with eight equivalent AcAc8Tm4 cuboctahedra, edges with eight equivalent TmAc12 cuboctahedra, edges with sixteen equivalent AcAc8Tm4 cuboctahedra, faces with four equivalent TmAc12 cuboctahedra, and faces with fourteen AcAc8Tm4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3Cd by Materials Project

Ac3Cd is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Cd atoms to form distorted AcAc8Cd4 cuboctahedra that share corners with twelve equivalent AcAc8Cd4 cuboctahedra, edges with eight equivalent AcAc8Cd4 cuboctahedra, edges with eight equivalent CdAc12 cuboctahedra, faces with four equivalent CdAc12 cuboctahedra, and faces with ten equivalent AcAc8Cd4 cuboctahedra. There are four shorter (3.71 Å) and four longer (3.85 Å) Ac–Ac bond lengths. All Ac–Cd bond lengths are 3.85 Å. In the second Ac site, Ac is bonded in a distorted square co-planar geometry to eight equivalent Ac and four equivalent Cd atoms. All Ac–Cd bond lengths are 3.71 Å. Cd is bonded to twelve Ac atoms to form CdAc12 cuboctahedra that share corners with four equivalent CdAc12 cuboctahedra, edges with eight equivalent CdAc12 cuboctahedra, edges with sixteen equivalent AcAc8Cd4 cuboctahedra, faces with four equivalent CdAc12 cuboctahedra, and faces with eight equivalent AcAc8Cd4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3Lu by Materials Project

Ac3Lu is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Lu atoms to form AcAc8Lu4 cuboctahedra that share corners with twelve equivalent AcAc8Lu4 cuboctahedra, edges with eight equivalent LuAc12 cuboctahedra, edges with sixteen AcAc8Lu4 cuboctahedra, faces with four equivalent LuAc12 cuboctahedra, and faces with fourteen AcAc8Lu4 cuboctahedra. All Ac–Ac bond lengths are 3.87 Å. All Ac–Lu bond lengths are 3.87 Å. In the second Ac site, Ac is bonded to eight equivalent Ac and four equivalent Lu atoms to form AcAc8Lu4 cuboctahedra that share corners with four equivalent AcAc8Lu4 cuboctahedra, corners with eight equivalent LuAc12 cuboctahedra, edges with twenty-four AcAc8Lu4 cuboctahedra, faces with six equivalent LuAc12 cuboctahedra, and faces with twelve AcAc8Lu4 cuboctahedra. All Ac–Lu bond lengths are 3.87 Å. Lu is bonded to twelve Ac atoms to form LuAc12 cuboctahedra that share corners with four equivalent LuAc12 cuboctahedra, corners with eight equivalent AcAc8Lu4 cuboctahedra, edges with eight equivalent LuAc12 cuboctahedra, edges with sixteen equivalent AcAc8Lu4 cuboctahedra, faces with four equivalent LuAc12 cuboctahedra, and faces with fourteen AcAc8Lu4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3Ti by Materials Project

Ac3Ti is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Ti atoms to form distorted AcAc8Ti4 cuboctahedra that share corners with twelve equivalent AcAc8Ti4 cuboctahedra, edges with eight equivalent TiAc12 cuboctahedra, edges with sixteen AcAc8Ti4 cuboctahedra, faces with four equivalent TiAc12 cuboctahedra, and faces with fourteen AcAc8Ti4 cuboctahedra. There are four shorter (3.71 Å) and four longer (3.74 Å) Ac–Ac bond lengths. All Ac–Ti bond lengths are 3.74 Å. In the second Ac site, Ac is bonded to eight equivalent Ac and four equivalent Ti atoms to form distorted AcAc8Ti4 cuboctahedra that share corners with four equivalent AcAc8Ti4 cuboctahedra, corners with eight equivalent TiAc12 cuboctahedra, edges with twenty-four AcAc8Ti4 cuboctahedra, faces with six equivalent TiAc12 cuboctahedra, and faces with twelve AcAc8Ti4 cuboctahedra. All Ac–Ti bond lengths are 3.71 Å. Ti is bonded to twelve Ac atoms to form TiAc12 cuboctahedra that share corners with four equivalent TiAc12 cuboctahedra, corners with eight equivalent AcAc8Ti4 cuboctahedra, edges with eight equivalent TiAc12 cuboctahedra, edges with sixteen equivalent AcAc8Ti4 cuboctahedra, faces with four equivalent TiAc12 cuboctahedra, and faces with fourteen AcAc8Ti4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3V by Materials Project

Ac3V is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent V atoms to form distorted AcAc8V4 cuboctahedra that share corners with twelve equivalent AcAc8V4 cuboctahedra, edges with eight equivalent AcAc8V4 cuboctahedra, edges with eight equivalent VAc12 cuboctahedra, faces with four equivalent VAc12 cuboctahedra, and faces with ten equivalent AcAc8V4 cuboctahedra. There are four shorter (3.67 Å) and four longer (3.76 Å) Ac–Ac bond lengths. All Ac–V bond lengths are 3.76 Å. In the second Ac site, Ac is bonded in a distorted square co-planar geometry to eight equivalent Ac and four equivalent V atoms. All Ac–V bond lengths are 3.67 Å. V is bonded to twelve Ac atoms to form VAc12 cuboctahedra that share corners with four equivalent VAc12 cuboctahedra, edges with eight equivalent VAc12 cuboctahedra, edges with sixteen equivalent AcAc8V4 cuboctahedra, faces with four equivalent VAc12 cuboctahedra, and faces with eight equivalent AcAc8V4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3Ag by Materials Project

Ac3Ag is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Ag atoms to form distorted AcAc8Ag4 cuboctahedra that share corners with twelve equivalent AcAc8Ag4 cuboctahedra, edges with eight equivalent AcAc8Ag4 cuboctahedra, edges with eight equivalent AgAc12 cuboctahedra, faces with four equivalent AgAc12 cuboctahedra, and faces with ten equivalent AcAc8Ag4 cuboctahedra. There are four shorter (3.68 Å) and four longer (3.81 Å) Ac–Ac bond lengths. All Ac–Ag bond lengths are 3.81 Å. In the second Ac site, Ac is bonded in a distorted square co-planar geometry to eight equivalent Ac and four equivalent Ag atoms. All Ac–Ag bond lengths are 3.68 Å. Ag is bonded to twelve Ac atoms to form AgAc12 cuboctahedra that share corners with four equivalent AgAc12 cuboctahedra, edges with eight equivalent AgAc12 cuboctahedra, edges with sixteen equivalent AcAc8Ag4 cuboctahedra, faces with four equivalent AgAc12 cuboctahedra, and faces with eight equivalent AcAc8Ag4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3Zn by Materials Project

Ac3Zn is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Zn atoms to form distorted AcAc8Zn4 cuboctahedra that share corners with twelve equivalent AcAc8Zn4 cuboctahedra, edges with eight equivalent AcAc8Zn4 cuboctahedra, edges with eight equivalent ZnAc12 cuboctahedra, faces with four equivalent ZnAc12 cuboctahedra, and faces with ten equivalent AcAc8Zn4 cuboctahedra. There are four shorter (3.64 Å) and four longer (3.79 Å) Ac–Ac bond lengths. All Ac–Zn bond lengths are 3.79 Å. In the second Ac site, Ac is bonded in a distorted square co-planar geometry to eight equivalent Ac and four equivalent Zn atoms. All Ac–Zn bond lengths are 3.64 Å. Zn is bonded to twelve Ac atoms to form ZnAc12 cuboctahedra that share corners with four equivalent ZnAc12 cuboctahedra, edges with eight equivalent ZnAc12 cuboctahedra, edges with sixteen equivalent AcAc8Zn4 cuboctahedra, faces with four equivalent ZnAc12 cuboctahedra, and faces with eight equivalent AcAc8Zn4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3Yb by Materials Project

Ac3Yb is Copper-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Yb atoms to form AcAc8Yb4 cuboctahedra that share corners with twelve equivalent AcAc8Yb4 cuboctahedra, edges with eight equivalent YbAc12 cuboctahedra, edges with sixteen AcAc8Yb4 cuboctahedra, faces with four equivalent YbAc12 cuboctahedra, and faces with fourteen AcAc8Yb4 cuboctahedra. There are four shorter (3.93 Å) and four longer (3.96 Å) Ac–Ac bond lengths. All Ac–Yb bond lengths are 3.96 Å. In the second Ac site, Ac is bonded to eight equivalent Ac and four equivalent Yb atoms to form AcAc8Yb4 cuboctahedra that share corners with four equivalent AcAc8Yb4 cuboctahedra, corners with eight equivalent YbAc12 cuboctahedra, edges with twenty-four AcAc8Yb4 cuboctahedra, faces with six equivalent YbAc12 cuboctahedra, and faces with twelve AcAc8Yb4 cuboctahedra. All Ac–Yb bond lengths are 3.93 Å. Yb is bonded to twelve Ac atoms to form YbAc12 cuboctahedra that share corners with four equivalent YbAc12 cuboctahedra, corners with eight equivalent AcAc8Yb4 cuboctahedra, edges with eight equivalent YbAc12 cuboctahedra, edges with sixteen equivalent AcAc8Yb4 cuboctahedra, faces with four equivalent YbAc12 cuboctahedra, and faces with fourteen AcAc8Yb4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3Y by Materials Project

Ac3Y is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Y atoms to form AcAc8Y4 cuboctahedra that share corners with twelve equivalent AcAc8Y4 cuboctahedra, edges with eight equivalent YAc12 cuboctahedra, edges with sixteen AcAc8Y4 cuboctahedra, faces with four equivalent YAc12 cuboctahedra, and faces with fourteen AcAc8Y4 cuboctahedra. All Ac–Ac bond lengths are 3.90 Å. All Ac–Y bond lengths are 3.90 Å. In the second Ac site, Ac is bonded to eight equivalent Ac and four equivalent Y atoms to form AcAc8Y4 cuboctahedra that share corners with four equivalent AcAc8Y4 cuboctahedra, corners with eight equivalent YAc12 cuboctahedra, edges with twenty-four AcAc8Y4 cuboctahedra, faces with six equivalent YAc12 cuboctahedra, and faces with twelve AcAc8Y4 cuboctahedra. All Ac–Y bond lengths are 3.90 Å. Y is bonded to twelve Ac atoms to form YAc12 cuboctahedra that share corners with four equivalent YAc12 cuboctahedra, corners with eight equivalent AcAc8Y4 cuboctahedra, edges with eight equivalent YAc12 cuboctahedra, edges with sixteen equivalent AcAc8Y4 cuboctahedra, faces with four equivalent YAc12 cuboctahedra, and faces with fourteen AcAc8Y4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3Nb by Materials Project

Ac3Nb is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Nb atoms to form distorted AcAc8Nb4 cuboctahedra that share corners with twelve equivalent AcAc8Nb4 cuboctahedra, edges with eight equivalent NbAc12 cuboctahedra, edges with sixteen AcAc8Nb4 cuboctahedra, faces with four equivalent NbAc12 cuboctahedra, and faces with fourteen AcAc8Nb4 cuboctahedra. There are four shorter (3.66 Å) and four longer (3.71 Å) Ac–Ac bond lengths. All Ac–Nb bond lengths are 3.71 Å. In the second Ac site, Ac is bonded to eight equivalent Ac and four equivalent Nb atoms to form distorted AcAc8Nb4 cuboctahedra that share corners with four equivalent AcAc8Nb4 cuboctahedra, corners with eight equivalent NbAc12 cuboctahedra, edges with twenty-four AcAc8Nb4 cuboctahedra, faces with six equivalent NbAc12 cuboctahedra, and faces with twelve AcAc8Nb4 cuboctahedra. All Ac–Nb bond lengths are 3.66 Å. Nb is bonded to twelve Ac atoms to form NbAc12 cuboctahedra that share corners with four equivalent NbAc12 cuboctahedra, corners with eight equivalent AcAc8Nb4 cuboctahedra, edges with eight equivalent NbAc12 cuboctahedra, edges with sixteen equivalent AcAc8Nb4 cuboctahedra, faces with four equivalent NbAc12 cuboctahedra, and faces with fourteen AcAc8Nb4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ac3Mo by Materials Project

Ac3Mo is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ac sites. In the first Ac site, Ac is bonded to eight Ac and four equivalent Mo atoms to form distorted AcAc8Mo4 cuboctahedra that share corners with twelve equivalent AcAc8Mo4 cuboctahedra, edges with eight equivalent AcAc8Mo4 cuboctahedra, edges with eight equivalent MoAc12 cuboctahedra, faces with four equivalent MoAc12 cuboctahedra, and faces with ten equivalent AcAc8Mo4 cuboctahedra. There are four shorter (3.57 Å) and four longer (3.70 Å) Ac–Ac bond lengths. All Ac–Mo bond lengths are 3.70 Å. In the second Ac site, Ac is bonded in a square co-planar geometry to eight equivalent Ac and four equivalent Mo atoms. All Ac–Mo bond lengths are 3.57 Å. Mo is bonded to twelve Ac atoms to form MoAc12 cuboctahedra that share corners with four equivalent MoAc12 cuboctahedra, edges with eight equivalent MoAc12 cuboctahedra, edges with sixteen equivalent AcAc8Mo4 cuboctahedra, faces with four equivalent MoAc12 cuboctahedra, and faces with eight equivalent AcAc8Mo4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2022

H 2 BZmacropa-NCS: A Bifunctional Chelator for Actinium-225 Targeted Alpha Therapy

Actinium-225 ( 225 Ac) is one of the most promising radionuclides for targeted alpha therapy (TAT). With a half-life of 9.92 days and a decay chain that emits four high-energy α particles, 225 Ac is well-suited for TAT when conjugated to macromolecular targeting vectors that exhibit extended in vivo circulation times. The implementation of 225 Ac in these targeted constructs, however, requires a suitable chelator that can bind and retain this radionuclide in vivo. Previous work has demonstrated the suitability of a diaza-18-crown-6 macrocyclic chelator H 2 macropa for this application. Building upon these prior efforts, in this study, two rigid variants of H 2 macropa, which contain either one (H 2 BZmacropa) or two (H 2 BZ 2 macropa) benzene rings within the macrocyclic core, were synthesized and investigated for their potential use for 225 Ac TAT. The coordination chemistry of these ligands with La 3+ , used as a nonradioactive model for Ac 3+ , was carried out. Both NMR spectroscopic and X-ray crystallographic studies of the La 3+ complexes of these ligands revealed similar structural features to those found for the related complex of H 2 macropa. Thermodynamic stability constants of the La 3+ complexes, however, were found to be 1 and 2 orders of magnitude lower than those of H 2 macropa for H 2 BZmacropa and H 2 BZ 2 macropa, respectively. The decrease in thermodynamic stability was rationalized via the use of density functional theory calculations. 225 Ac radiolabeling and serum stability studies with H 2 BZmacropa showed that this chelator compares favorably with H 2 macropa. Based on these promising results, a bifunctional version of this chelator, H 2 BZmacropa-NCS, was synthesized and conjugated to the antibody codrituzumab (GC33), which targets the liver cancer biomarker glypican-3 (GPC3). The resulting GC33-BZmacropa conjugate and an analogous GC33-macropa conjugate were evaluated for their 225 Ac radiolabeling efficiencies, antigen-binding affinities, and in vivo biodistribution in HepG2 liver cancer tumor-bearing mice. Although both conjugates were comparably effective in their radiolabeling efficiencies, [ 225 Ac]Ac-GC33-BZmacropa showed slightly poorer serum stability and biodistribution than [ 225 Ac]Ac-GC33-macropa. Altogether, these results establish H2BZmacropa-NCS as a new bifunctional chelator for the preparation of 225 Ac radiopharmaceuticals.

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

Materials Data on NaAc3 by Materials Project

NaAc3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Na is bonded in a body-centered cubic geometry to fourteen Ac atoms. There are eight shorter (3.85 Å) and six longer (4.45 Å) Na–Ac bond lengths. There are two inequivalent Ac sites. In the first Ac site, Ac is bonded in a distorted body-centered cubic geometry to four equivalent Na and four equivalent Ac atoms. All Ac–Ac bond lengths are 3.85 Å. In the second Ac site, Ac is bonded in a distorted body-centered cubic geometry to six equivalent Na and eight equivalent Ac atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaAc3 by Materials Project

BaAc3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ba is bonded to twelve Ac atoms to form BaAc12 cuboctahedra that share corners with six equivalent BaAc12 cuboctahedra, corners with twelve AcBa4Ac8 cuboctahedra, edges with eighteen AcBa4Ac8 cuboctahedra, faces with eight equivalent BaAc12 cuboctahedra, and faces with twelve AcBa4Ac8 cuboctahedra. There are six shorter (4.10 Å) and six longer (4.12 Å) Ba–Ac bond lengths. There are two inequivalent Ac sites. In the first Ac site, Ac is bonded to four equivalent Ba and eight Ac atoms to form AcBa4Ac8 cuboctahedra that share corners with four equivalent BaAc12 cuboctahedra, corners with fourteen AcBa4Ac8 cuboctahedra, edges with six equivalent BaAc12 cuboctahedra, edges with twelve AcBa4Ac8 cuboctahedra, faces with four equivalent BaAc12 cuboctahedra, and faces with sixteen AcBa4Ac8 cuboctahedra. There are a spread of Ac–Ac bond distances ranging from 4.00–4.24 Å. In the second Ac site, Ac is bonded to four equivalent Ba and eight equivalent Ac atoms to form AcBa4Ac8 cuboctahedra that share corners with four equivalent BaAc12 cuboctahedra, corners with fourteen AcBa4Ac8 cuboctahedra, edges with six equivalent BaAc12 cuboctahedra, edges with twelve equivalent AcBa4Ac8 cuboctahedra, faces with four equivalent BaAc12 cuboctahedra, and faces with sixteen AcBa4Ac8 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KAc3 by Materials Project

KAc3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. K is bonded in a distorted body-centered cubic geometry to fourteen Ac atoms. There are eight shorter (3.98 Å) and six longer (4.59 Å) K–Ac bond lengths. There are two inequivalent Ac sites. In the first Ac site, Ac is bonded in a distorted body-centered cubic geometry to four equivalent K and four equivalent Ac atoms. All Ac–Ac bond lengths are 3.98 Å. In the second Ac site, Ac is bonded in a 8-coordinate geometry to six equivalent K and eight equivalent Ac atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2023

Sulfurospirillum diekertiae sp. nov., a tetrachloroethene-respiring bacterium isolated from contaminated soil

Two anaerobic, tetrachloroethene- (PCE-) respiring bacterial isolates, designated strain ACS DCE T and strain ACS TCE , were characterized using a polyphasic approach. Cells were Gram-stain-negative, motile, non-spore-forming and shared a vibrioid- to spirillum-shaped morphology. Optimum growth occurred at 30°C and 0.1–0.4% salinity. The pH range for growth was pH 5.5–7.5, with an optimum at pH 7.2. Hydrogen, formate, pyruvate and lactate as electron donors supported respiratory reductive dechlorination of PCE to cis-1,2-dichloroethene (cDCE) in strain ACS DCE T and of PCE to trichloroethene (TCE) in strain ACS TCE . Both strains were able to grow with pyruvate under microaerobic conditions. Nitrate, elemental sulphur, and thiosulphate were alternative electron acceptors. Autotrophic growth was not observed and acetate served as carbon source for both strains. The major cellular fatty acids were C 16:1 ω7c, C 16:0 , C 14:0 and C 18:1 ω7c. Both genomes feature a circular plasmid. Strains ACS DCE T and ACS TCE were previously assigned to the candidate species 'Sulfurospirillum acididehalogenans'. Here, based on key genomic features and pairwise comparisons of whole-genome sequences, including average nucleotide identity, digital DNA–DNA hybridization and average amino acid identity, strains ACS DCE T and ACS TCE , 'Ca. Sulfurospirillum diekertiae' strains SL2-1 and SL2-2, and the unclassified Sulfurospirillum sp. strain SPD-1 are grouped into one distinct species separate from previously described Sulfurospirillum species. Compared to Sulfurospirillum multivorans and Sulfurospirillum halorespirans, which dechlorinate PCE to cDCE without substantial TCE accumulation, these five strains produce TCE or cDCE as the end product. In addition, some cellular fatty acids (e.g., C 16:0 3OH, C 17:0 iso 3OH, C 17:0 2OH) were detected in strains ACS DCE T and ACS TCE but not in other Sulfurospirillum species. On the basis of phylogenetic, physiological and phenotypic characteristics, 'Ca. Sulfurospirillum acididehalogenans' and 'Ca. Sulfurospirillum diekertiae' are proposed to be merged into one novel species within the genus Sulfurospirillum, for which the name Sulfurospirillum diekertiae sp. nov. is proposed. Finally, the type strain is ACS DCE T (=JCM 33349 T = KCTC 15819 T =CGMCC 1.5292 T ).

59 BASIC BIOLOGICAL SCIENCES↗
DOE OSTI2025

EVSE Characterization: V2G EVSE Comparison

As part of the U.S. Department of Energy EVs@Scale consortium Next-Generation Profiles project, results and analysis from the characterization of high-power conductive and wireless charging infrastructure are presented. This characterization is conducted over a wide range of direct current (DC) current and DC voltage operation for nominal test conditions and off-nominal test conditions. Test plans and procedures were developed to define the test configurations and requirements, measurement parameters, and test procedures used throughout testing. Results from a 2024 study conducted on electric vehicle supply equipment (EVSE) characterization by the Idaho National Laboratory (INL) include two bi-directional vehicle-to-grid (V2G) capable EVSEs. These EVSE are referred to as V2G-EVSE9 and V2G-EVSE10. Laboratory testing is conducted at nominal test conditions to characterize the power transfer capabilities, efficiency, power factor, and other power quality metrics of the two DC EVSEs capable of V2G bi-directional power transfer. Results from testing show the performance is consistent for V2G-EVSE9 and V2G-EVSE10 when comparing charging to discharging performance, except for V2G-EVSE10 for power transfer when operating above 70% of the rated DC current. V2G-EVSE10 efficiency is >98% while charging and <91% while discharging at the same operating conditions, near maximum-rated current, at 300VDC. In contrast, V2G-EVSE9 results are consistent for charging and discharging. This EVSE is nearly 96% efficient while charging or discharging when operating over 50% of rated AC power. V2G EVSE performance is also characterized during off-nominal AC grid conditions involving AC voltage deviation (426 VAC to 518 VAC), AC frequency deviation of +2% (58.8 Hz to 61.2 Hz), and AC voltage harmonics injection. Many test conditions have little-to-no impact on performance characteristics of the two EVSEs; however, there are a few notable findings with significant power transfer capability impacts. AC voltage harmonics injection resulted in negative impacts on power quality attributes for both EVSEs, but with no impact on power transfer capability. Off-nominal AC voltage and frequency conditions resulted in unstable or lack of power transfer capability for both EVSEs. V2G-EVSE9 is unable to transfer power when AC voltage is >300V L-N. V2G-EVSE10 is unable to transfer power when AC frequency deviation exceeds +0.8%. V2G energy management system transient response and latency are quantified during laboratory testing. V2G-EVSE9 and V2G-EVSE10 utilize cloud-based V2G energy management systems that command the power transfer level between the EVSE and EV. The latency and response characteristics of the entire systems (web-based user interface, V2G energy management system, cellular communications, and EVSE response) are quantified through laboratory testing for V2G-EVSE9 and V2G-EVSE10. V2G-EVSE9 latency ranges from 0.8 to 1.8 seconds, whereas V2G-EVSE10 latency ranges from 3.4 to 8.8 seconds. The ramp rate to a change in power transfer request also differs between the two EVSEs. V2G-EVSE10 ramp rate ranges from 50% to -250% of rated AC power per second, whereas V2G-EVSE9 rate ranges from 95% to -95% of rated AC power per second. At the highest rate of change in power transfer, V2G-EVSE10 can change from full charge power to full discharge power in less than one second. The V2G EVSE characterization presented in this report provides valuable insights and results for use by numerous entities. This includes modeling and simulation organizations, decision makers, fleet planning, industry stakeholders, and many others involved with the development and deployment of electrified transportation technologies. Additional high-power DC chargers, bidirectional chargers, and inductive power transfer EVSE characterization results are anticipated from additional EVSE brands and models, which will be detailed in future publications in support of the U.S. Department of Energy EVs@Scale consortium Next-Gen Profiles project.

25 ENERGY STORAGE↗
DOE OSTI2020

Soft-Switching Solid-State Transformer With Reduced Conduction Loss

Solid-state transformers (SSTs) are a promising solution photovoltaic (PV), wind, traction, data center, battery energy storage system (BESS), and fast charging electric vehicle (EV) applications. The traditional SSTs are typically three-stage, i.e., hard-switching cascaded multilevel rectifiers and inverters with dual active bridge (DAB) converters, which leads to bulky passives, low efficiency, and high electromagnetic interference (EMI). This article proposes a new soft-switching solid-state transformer (S4T). The S4T has full-range zero-voltage switching (ZVS), electrolytic capacitor-less dc link, and controlled dv/dt, which reduces EMI. The S4T comprises two reverse-blocking current-source inverter (CSI) bridges, auxiliary branches for ZVS, and transformer magnetizing inductor as a reduced dc link with 60% ripple. Compared with the prior S4T, an effective change on the leakage inductance diode is made to reduce the number of the devices on the main power path by 20% for significant conduction loss saving and retain the same functionality of damping the resonance between the leakage and resonant capacitors and recycling trapped leakage energy. The conduction loss saving is crucial, being the dominating loss mechanism in SSTs. Importantly, the proposed single-stage SST not only holds the potential for high power density and high efficiency but also has full functionality, e.g., multiport dc loads integration, voltage regulation, and reactive power compensation, unlike the traditional single-stage matrix SST. The S4T can achieve single-stage isolated bidirectional dc–dc, ac–dc, dc–ac, or ac–ac conversion. It can also be configured input-series output-parallel (ISOP) in a modular way for medium-voltage (MV) grids. Hence, the S4T is a promising candidate for the SST. The full functionality, e.g., voltage buck–boost, multiport, etc., and the universality of the S4T for the dc–dc, dc–ac, and ac–ac conversion are verified through the simulations and experiments of two-port and three-port MV prototypes based on 3.3 kV SiC MOSFETs in dc–dc, dc–ac, and ac–ac modes at 2 kV.

14 SOLAR ENERGY↗