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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Os4C13(SO6)2 by Materials Project

Os4C13(SO6)2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two Os4C13(SO6)2 clusters. there are four inequivalent Os2- sites. In the first Os2- site, Os2- is bonded in a 5-coordinate geometry to four C+2.77+ and one S2- atom. There are a spread of Os–C bond distances ranging from 1.90–2.16 Å. The Os–S bond length is 2.49 Å. In the second Os2- site, Os2- is bonded to four C+2.77+ and one S2- atom to form distorted edge-sharing OsC4S trigonal bipyramids. There are a spread of Os–C bond distances ranging from 1.91–2.19 Å. The Os–S bond length is 2.44 Å. In the third Os2- site, Os2- is bonded to four C+2.77+ and one S2- atom to form distorted edge-sharing OsC4S trigonal bipyramids. There are a spread of Os–C bond distances ranging from 1.91–2.23 Å. The Os–S bond length is 2.47 Å. In the fourth Os2- site, Os2- is bonded to four C+2.77+ and one S2- atom to form distorted edge-sharing OsC4S trigonal bipyramids. There are a spread of Os–C bond distances ranging from 1.91–2.23 Å. The Os–S bond length is 2.47 Å. There are thirteen inequivalent C+2.77+ sites. In the first C+2.77+ site, C+2.77+ is bonded in a distorted linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the second C+2.77+ site, C+2.77+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the third C+2.77+ site, C+2.77+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the fourth C+2.77+ site, C+2.77+ is bonded in a distorted linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the fifth C+2.77+ site, C+2.77+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the sixth C+2.77+ site, C+2.77+ is bonded in a distorted linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the seventh C+2.77+ site, C+2.77+ is bonded in a distorted linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the eighth C+2.77+ site, C+2.77+ is bonded in a distorted trigonal bipyramidal geometry to four Os2- and one S2- atom. The C–S bond length is 1.75 Å. In the ninth C+2.77+ site, C+2.77+ is bonded in a distorted linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the tenth C+2.77+ site, C+2.77+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the eleventh C+2.77+ site, C+2.77+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the twelfth C+2.77+ site, C+2.77+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the thirteenth C+2.77+ site, C+2.77+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a 3-coordinate geometry to three Os2- atoms. In the second S2- site, S2- is bonded in a 1-coordinate geometry to one Os2- and one C+2.77+ atom. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the sixth O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the eighth O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the ninth O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the tenth O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the eleventh O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom. In the twelfth O2- site, O2- is bonded in a single-bond geometry to one C+2.77+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on U(Zn10Os)2 by Materials Project

UOs2Zn20 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. U is bonded in a 4-coordinate geometry to sixteen Zn atoms. There are four shorter (3.10 Å) and twelve longer (3.13 Å) U–Zn bond lengths. Os is bonded to twelve Zn atoms to form OsZn12 cuboctahedra that share corners with six equivalent OsZn12 cuboctahedra, edges with eighteen equivalent ZnUZn10Os cuboctahedra, and faces with six equivalent ZnUZn10Os cuboctahedra. There are six shorter (2.54 Å) and six longer (2.81 Å) Os–Zn bond lengths. There are three inequivalent Zn sites. In the first Zn site, Zn is bonded in a 2-coordinate geometry to two equivalent U and twelve equivalent Zn atoms. All Zn–Zn bond lengths are 3.04 Å. In the second Zn site, Zn is bonded in a distorted linear geometry to two equivalent Os and six equivalent Zn atoms. There are two shorter (2.69 Å) and four longer (2.83 Å) Zn–Zn bond lengths. In the third Zn site, Zn is bonded to one U, one Os, and ten Zn atoms to form distorted ZnUZn10Os cuboctahedra that share corners with fifteen equivalent ZnUZn10Os cuboctahedra, edges with two equivalent ZnUZn10Os cuboctahedra, edges with three equivalent OsZn12 cuboctahedra, a faceface with one OsZn12 cuboctahedra, and faces with fifteen equivalent ZnUZn10Os cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.64–2.92 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2026

Multisite Field Evaluation of Oil Accumulation and Agronomic Performance in Grain and Sweet Sorghums Engineered for Lipid Hyperaccumulation

Oil sorghum (OS) has been developed by engineering grain (TX430) and sweet (Ramada) genetic backgrounds to accumulate triacylglycerols (TAG) in vegetative tissues as an energy-dense feedstock for sustainable aviation fuel (SAF) and other biofuels. This study evaluated two TX430 OS lines (TxHO-2, TxHO-3) and two Ramada OS lines (RmHO-1, RmHO-2) alongside wild-type (WT) lines in NE and IL over 2 years (2023–2024) to quantify genotype × environment effects on agronomic performance and TAG accumulation. Across four environments, TX430 OS lines showed average TAG concentrations of 15.0 g kg −1 in leaves and 12.8 g kg −1 in stems, approximately 19-fold higher than WT. Ramada OS lines accumulated 26.1 g kg −1 in leaves and 12.3 g kg −1 in stems, approximately 25-fold and 13-fold increases over WT, respectively. OS lines in TX430 exhibited an 18% reduction in biomass (8.4 vs. 9.9 Mg ha −1 for WT), while Ramada OS lines had similar WT biomass (18.3 vs. 19.9 Mg ha −1 for WT). Among TX430 OS lines, TxHO-2 achieved the highest TAG yield (190 kg ha −1 ), while RmHO-1 led the Ramada lines (335 kg ha −1 ) due to higher biomass and similar TAG concentration. Enhanced TAG accumulation increased N, P, and K removal in TX430 lines but not in Ramada lines. Structural carbohydrate and ash concentration were unaffected. Overall, results confirm vegetative lipid accumulation as a viable strategy for high-biomass sorghum, supporting its potential as a dual-purpose feedstock for SAF. Future work should focus on minimizing biomass yield penalties and improving nutrient use efficiency in oil sorghum systems.

60 APPLIED LIFE SCIENCES↗
DOE OSTI2020

Materials Data on Be17Os3 by Materials Project

Be17Os3 crystallizes in the cubic Im-3 space group. The structure is three-dimensional. there are six inequivalent Be sites. In the first Be site, Be is bonded in a 2-coordinate geometry to nine Be and two equivalent Os atoms. There are a spread of Be–Be bond distances ranging from 2.20–2.48 Å. Both Be–Os bond lengths are 2.43 Å. In the second Be site, Be is bonded to nine Be and three equivalent Os atoms to form a mixture of edge and face-sharing BeBe9Os3 cuboctahedra. There are a spread of Be–Be bond distances ranging from 2.05–2.24 Å. There are one shorter (2.51 Å) and two longer (2.54 Å) Be–Os bond lengths. In the third Be site, Be is bonded to ten Be and two equivalent Os atoms to form distorted BeBe10Os2 cuboctahedra that share corners with four equivalent BeBe10Os2 cuboctahedra, an edgeedge with one BeBe10Os2 cuboctahedra, and faces with six equivalent BeBe9Os3 cuboctahedra. All Be–Be bond lengths are 2.22 Å. Both Be–Os bond lengths are 2.61 Å. In the fourth Be site, Be is bonded in a 9-coordinate geometry to six Be and three equivalent Os atoms. There are three shorter (2.13 Å) and three longer (2.17 Å) Be–Be bond lengths. All Be–Os bond lengths are 2.44 Å. In the fifth Be site, Be is bonded in a 10-coordinate geometry to seven Be and three equivalent Os atoms. There are one shorter (2.16 Å) and two longer (2.21 Å) Be–Be bond lengths. There are a spread of Be–Os bond distances ranging from 2.40–2.47 Å. In the sixth Be site, Be is bonded in a distorted q6 geometry to six Be and three equivalent Os atoms. The Be–Be bond length is 2.11 Å. There are one shorter (2.41 Å) and two longer (2.50 Å) Be–Os bond lengths. Os is bonded in a 4-coordinate geometry to sixteen Be atoms.

36 MATERIALS SCIENCE↗
NASA NTRS1995

Geologic Map of the MTM-85000 Quadrangle, Mars

the geologic map presented here covers the portion of Mars between latitudes 82.5oS to 87.5oS, longitudes -20oW to 20oW. The Viking Orbiter 2 images used to construct the photomosaic base used for mapping were taken during the southern summer of 1977, with resolutions no better than 140 meters/pixel. A digital mosaic of Mariner 9 images was also constructed to aid in mapping. The Mariner 9 images were taken during the southern summer of 1971-72, and have resolutions as high as 85 meters/pixel. However, usefulness of the Mariner 9 mosaic is limited by incomplete coverage and atmospheric dust opacity.

MTM-85000 Mars↗
DOE OSTI2020

Materials Data on H2Os3C8(SO4)2 by Materials Project

Os3C8H2(SO4)2 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four Os3C8H2(SO4)2 clusters. there are two inequivalent Os2- sites. In the first Os2- site, Os2- is bonded to two equivalent C3+, two equivalent H1+, and two equivalent S2- atoms to form distorted face-sharing OsH2C2S2 octahedra. Both Os–C bond lengths are 1.89 Å. Both Os–H bond lengths are 1.76 Å. Both Os–S bond lengths are 2.46 Å. In the second Os2- site, Os2- is bonded to three C3+, one H1+, and two equivalent S2- atoms to form distorted OsHC3S2 octahedra that share an edgeedge with one OsHC3S2 octahedra and a faceface with one OsH2C2S2 octahedra. There are a spread of Os–C bond distances ranging from 1.88–1.93 Å. The Os–H bond length is 2.01 Å. Both Os–S bond lengths are 2.44 Å. There are four inequivalent C3+ sites. In the first C3+ site, C3+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the second C3+ site, C3+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.17 Å. In the third C3+ site, C3+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. In the fourth C3+ site, C3+ is bonded in a linear geometry to one Os2- and one O2- atom. The C–O bond length is 1.16 Å. H1+ is bonded in an L-shaped geometry to two Os2- atoms. S2- is bonded in a 3-coordinate geometry to three Os2- atoms. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C3+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C3+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one C3+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one C3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Os(Cl2O)2 by Materials Project

K2Os(OCl2)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a body-centered cubic geometry to eight equivalent Cl1- atoms. All K–Cl bond lengths are 3.37 Å. In the second K1+ site, K1+ is bonded in a body-centered cubic geometry to eight equivalent Cl1- atoms. All K–Cl bond lengths are 3.37 Å. There are two inequivalent Os6+ sites. In the first Os6+ site, Os6+ is bonded in a distorted octahedral geometry to two equivalent O2- and four equivalent Cl1- atoms. Both Os–O bond lengths are 1.76 Å. All Os–Cl bond lengths are 2.42 Å. In the second Os6+ site, Os6+ is bonded in a distorted octahedral geometry to two equivalent O2- and four equivalent Cl1- atoms. Both Os–O bond lengths are 1.76 Å. All Os–Cl bond lengths are 2.42 Å. O2- is bonded in a single-bond geometry to one Os6+ atom. Cl1- is bonded in a 5-coordinate geometry to four K1+ and one Os6+ atom.

36 MATERIALS SCIENCE↗
NASA NTRS2018

A Study of Various Beacon Antennas for an Orbiting Sample Container of a Future Mars Sample Return Mission

This paper presents some results of a study of various options for a near-omnidirectional low-gain antenna at UHF frequencies, for a Mars Orbiting Sample Return Container (OS). The OS is part of a concept study for a future mission to return samples from Mars. It would be a critical component of such a mission, which would contain the Mars samples. The notional OS would be returned by a separate spacecraft to Earth. The OS would be identified and located by the spacecraft for pick-up from orbit by a beacon signal broadcast via a surface antenna. Several antenna designs were considered, but two promising ones are presented here which have good patterns with a better than 2:1 VSWR (Voltage Standing Wave Ratio), but meet different criteria for OS design options. One is a patch-type antenna and the other a slot-type antenna. Some data and test results of a fabricated breadboard antenna as well as discussions are provided.

Jamnejad, Vahraz↗
DOE OSTI2020

Materials Data on Ba(POs)2 by Materials Project

Ba(OsP)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ba2+ is bonded in a 8-coordinate geometry to eight equivalent Os2- atoms. All Ba–Os bond lengths are 3.69 Å. Os2- is bonded to four equivalent Ba2+ and four equivalent P1+ atoms to form a mixture of distorted corner, edge, and face-sharing OsBa4P4 tetrahedra. All Os–P bond lengths are 2.35 Å. P1+ is bonded in a 4-coordinate geometry to four equivalent Os2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H24OsC8(NF3)2 by Materials Project

FFOs((CH3)4NF)2F2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one difluoroosmium molecule, two hydrofluoric acid molecules, and two (CH3)4NF clusters. In each (CH3)4NF cluster, there are four inequivalent C+1.25- sites. In the first C+1.25- site, C+1.25- is bonded in a 1-coordinate geometry to four H1+ atoms. There are a spread of C–H bond distances ranging from 0.83–1.70 Å. In the second C+1.25- site, C+1.25- is bonded in a 4-coordinate geometry to four H1+ atoms. There are a spread of C–H bond distances ranging from 0.82–1.66 Å. In the third C+1.25- site, C+1.25- is bonded in a 4-coordinate geometry to one N3- and three H1+ atoms. The C–N bond length is 1.12 Å. There are a spread of C–H bond distances ranging from 1.12–1.72 Å. In the fourth C+1.25- site, C+1.25- is bonded in a distorted single-bond geometry to one N3- and three H1+ atoms. The C–N bond length is 1.55 Å. There are a spread of C–H bond distances ranging from 0.80–1.75 Å. N3- is bonded in a 2-coordinate geometry to two C+1.25- atoms. There are twelve inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C+1.25- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C+1.25- atom. In the third H1+ site, H1+ is bonded in a bent 150 degrees geometry to one C+1.25- and one F1- atom. The H–F bond length is 1.44 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.25- atom. In the fifth H1+ site, H1+ is bonded in a water-like geometry to two C+1.25- atoms. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.25- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one C+1.25- atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.25- atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.25- atom. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.25- atom. In the eleventh H1+ site, H1+ is bonded in a single-bond geometry to one C+1.25- atom. In the twelfth H1+ site, H1+ is bonded in a distorted L-shaped geometry to two C+1.25- atoms. F1- is bonded in a single-bond geometry to one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu(POs)2 by Materials Project

Eu(OsP)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Eu2+ is bonded in a 8-coordinate geometry to eight equivalent Os2- atoms. All Eu–Os bond lengths are 3.38 Å. Os2- is bonded in a 12-coordinate geometry to four equivalent Eu2+ and four equivalent P1+ atoms. All Os–P bond lengths are 2.34 Å. P1+ is bonded in a 4-coordinate geometry to four equivalent Os2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2023

High-entropy halide perovskite single crystals stabilized by mild chemistry

High entropy materials are excellent candidates for a range of functional materials but traditionally require high-temperature synthetic procedures over 1000°C and complex processing techniques such as hot rolling to form. One route to address the extreme synthetic requirements for high entropy materials should involve designing crystal structures with ionic bonding networks and low cohesive energies. Here, we develop room-temperature (20°C) and low temperature (80°C) solution synthesis procedures for a new class of metal-halide perovskite high entropy semiconductor (HES) single crystals. Due to the soft, ionic lattice nature of the class of metal-halide perovskites, these HES single crystals are designed on the cubic Cs 2 MCl 6 (M = Zr 4+ , Sn 4+ , Te 4+ , Hf 4+ , Re 4+ , Os 4+ , Ir 4+ , or Pt 4+ ) vacancy-ordered double perovskite structure from the self-assembly of stabilized complexes in multielement inks, namely free Cs + cations and five or six different isolated [MCl6] 2- anionic octahedral molecules well-mixed in strong hydrochloric acid. The resulting single-phase single crystals span two HES families of five- and six-elements occupying the M-site as a random alloy in near-equimolar ratios, with the overall Cs 2 MCl 6 crystal structure and stoichiometry maintained. In conclusion, the incorporation of various [MCl 6 ] 2- octahedral molecular orbitals disordered across the high entropy five- and six-element Cs 2 MCl 6 single crystals produces complex vibrational and electronic structures with energy transfer interactions between the confined exciton states of the five or six different isolated octahedral molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on V4Os by Materials Project

V4Os crystallizes in the orthorhombic Fmmm space group. The structure is three-dimensional. there are two inequivalent V sites. In the first V site, V is bonded in a 2-coordinate geometry to two equivalent V and two equivalent Os atoms. Both V–V bond lengths are 2.54 Å. Both V–Os bond lengths are 2.58 Å. In the second V site, V is bonded in a distorted body-centered cubic geometry to eight V atoms. There are two shorter (2.54 Å) and four longer (2.67 Å) V–V bond lengths. Os is bonded in a 4-coordinate geometry to four equivalent V atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Np(SiOs)2 by Materials Project

Np(OsSi)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Np4+ is bonded in a 8-coordinate geometry to eight equivalent Os2- atoms. All Np–Os bond lengths are 3.17 Å. Os2- is bonded in a 4-coordinate geometry to four equivalent Np4+ and four equivalent Si atoms. All Os–Si bond lengths are 2.40 Å. Si is bonded in a 5-coordinate geometry to four equivalent Os2- and one Si atom. The Si–Si bond length is 2.35 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Re2Os(Se2Cl)2 by Materials Project

Re2Os(Se2Cl)2 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of one Re2Os(Se2Cl)2 sheet oriented in the (1, -1, 0) direction. there are four inequivalent Re6+ sites. In the first Re6+ site, Re6+ is bonded in a 5-coordinate geometry to two equivalent Os2- and five Se2- atoms. There are one shorter (2.65 Å) and one longer (2.66 Å) Re–Os bond lengths. There are a spread of Re–Se bond distances ranging from 2.52–2.67 Å. In the second Re6+ site, Re6+ is bonded in a 5-coordinate geometry to two equivalent Os2-, four Se2-, and one Cl1- atom. There are one shorter (2.65 Å) and one longer (2.66 Å) Re–Os bond lengths. There are one shorter (2.53 Å) and three longer (2.54 Å) Re–Se bond lengths. The Re–Cl bond length is 2.49 Å. In the third Re6+ site, Re6+ is bonded in a 5-coordinate geometry to two equivalent Os2-, four Se2-, and one Cl1- atom. There are one shorter (2.66 Å) and one longer (2.67 Å) Re–Os bond lengths. There are a spread of Re–Se bond distances ranging from 2.50–2.58 Å. The Re–Cl bond length is 2.51 Å. In the fourth Re6+ site, Re6+ is bonded in a 1-coordinate geometry to two equivalent Os2-, four Se2-, and one Cl1- atom. There are one shorter (2.66 Å) and one longer (2.67 Å) Re–Os bond lengths. There are a spread of Re–Se bond distances ranging from 2.52–2.56 Å. The Re–Cl bond length is 2.37 Å. There are two inequivalent Os2- sites. In the first Os2- site, Os2- is bonded in a 1-coordinate geometry to four Re6+, four Se2-, and one Cl1- atom. There are a spread of Os–Se bond distances ranging from 2.51–2.53 Å. The Os–Cl bond length is 2.37 Å. In the second Os2- site, Os2- is bonded in a 1-coordinate geometry to four Re6+, four Se2-, and one Cl1- atom. There are a spread of Os–Se bond distances ranging from 2.51–2.53 Å. The Os–Cl bond length is 2.37 Å. There are eight inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 8-coordinate geometry to two Re6+ and one Os2- atom. In the second Se2- site, Se2- is bonded in a 5-coordinate geometry to two Re6+ and one Os2- atom. In the third Se2- site, Se2- is bonded in a 4-coordinate geometry to two Re6+ and one Os2- atom. In the fourth Se2- site, Se2- is bonded in a 6-coordinate geometry to two Re6+ and one Os2- atom. In the fifth Se2- site, Se2- is bonded in a 4-coordinate geometry to two Re6+ and one Os2- atom. In the sixth Se2- site, Se2- is bonded in a 5-coordinate geometry to two Re6+ and one Os2- atom. In the seventh Se2- site, Se2- is bonded in a 4-coordinate geometry to three Re6+ and one Os2- atom. In the eighth Se2- site, Se2- is bonded in a 4-coordinate geometry to two Re6+, one Os2-, and one Cl1- atom. The Se–Cl bond length is 3.41 Å. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one Os2- atom. In the second Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one Os2- atom. In the third Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one Re6+ and one Se2- atom. In the fourth Cl1- site, Cl1- is bonded in a bent 120 degrees geometry to two Re6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2021

MiR-205–5p suppresses angiogenesis in gastric cancer by downregulating the expression of VEGFA and FGF1

Highlights: • MiR-205-5p was commonly downregulated in GC tissues from TCGA database and our hospital, and these events were associated with a worse TNM stagedistant metastasis and poor survival. • MiR-205-5p and CD31 expressions were negatively inter-related within GC tissues from TCGA database and our hospital. • GC cell lines expressed lower level of miR-205-5p significantly as compared with the normal gastric cell line. • MiR-205-5p upregulation significantly impaired proliferation and colony formation of GC cells and neovascularization induced by GC cells in vitro and in vivo. • The angiogenesis and ERK-signaling were depressed by VEGFA and FGF1 downregulation induced by miR-205-5p overexpression. The miR-205-5p inhibitor promoted malignant phenotypes by enhancing VEGFA and FGF1 expressions, as well as the activation of ERK-signaling. Anti-angiogenic therapy represents one of the most promising treatment modalities for human cancers. However, the response to antiangiogenic therapy in gastric cancer (GC) remains dismal. To help identify new strategies for antiangiogenic therapy in GC, we evaluated miR-205–5p expression in GC tissues from TCGA database and our hospital, and its functions in angiogenesis were explored in vitro and in vivo. We investigated miR-205–5p expression and microvessel densities (MVDs) in GC tissues and liver metastases from patients. The function and mechanisms of miR-205–5p were examined in human cell lines and in xenograft mouse models. Associations between miR-205–5p expression and clinical characteristics were analyzed using either Pearson's χ{sup 2} test or Fisher's exact test. Differences in overall survival (OS) distributions were evaluated using the log-rank test. Differences in measurement data were compared using Student's t-test and one-way ANOVA. We found that miR-205–5p expression was downregulated in GC tissues and was negatively correlated with CD31 expression in both TCGA and our clinical samples. GC cell lines expressed low levels of miR-205–5p, and miR-205–5p upregulation significantly impaired the proliferation and angiogenesis of GC cells. Moreover, vascular endothelial growth factor A (VEGFA) and fibroblast growth factor 1 (FGF1) expression and activation of extracellular-related kinase (ERK) signaling were suppressed by miR-205–5p. MiR-205–5p inhibition promoted malignant phenotypes by enhancing VEGFA and FGF1 expression, as well as the activation of ERK signaling. Angiogenesis and ERK signaling were decreased in response to VEGFA and FGF1 downregulation induced by miR-205–5p overexpression. The dual-luciferase reporter assay showed that VEGFA and FGF1 were direct targets of miR-205–5p. Xenograft mouse models revealed that miR-205–5p suppressed tumor growth by inhibiting neovascularization. Altogether, these results demonstrate that miR-205–5p suppresses angiogenesis in GC by attenuating the expression of VEGFA and FGF1, indicating that upregulation of miR-205–5p may represent as an antiangiogenic therapy for GC.

60 APPLIED LIFE SCIENCES↗
NASA NTRS1971

Optimization techniques for FORTRAN 4 (G and H) programs written for the IBM 360 under OS

A fairly complete list is reported of programming techniques which are available to the programmer for optimizing the execution time of production programs written in FORTRAN IV (G and H) for the IBM 360 under OS. After the program has been complied under FORTRAN H, OPT=2, then the process of actually changing code begins. The bulk of execution time of FORTRAN programs can almost always be attributed to a few loops, and primary consideration is given to these.

Dean, J. L.↗
NASA NTRS1991

The shock wave equation of state of brucite Mg(OH)2

New shock equation of state (EOS) data on magnesium hydroxide between 12 and 60 GPa is presented. It is found that the brucite EOS data between 12 and 97 GPa can be fit with a single linear U(s) - u(p) relationship: U(s) = 4.76(0.11) + 1.35(0.05)u(p). The third order Birch-Murnaghan equation parameters are K(os) = 51 + or - 4 GPa and K(os)prime = 5.0 + or - 0.4. The first partial release states measured for brucite Mg(OH)2 are reported. Calculated phase boundaries using the EOS data are found to be consistent with the experimental data and indicate that brucite is unlikely to be stable under lower mantle conditions. At high pressure, bulk sound velocities calculated for MgO and Mg(OH)2 are very similar, indicating that the presence of hydrous assemblages in the lower mantle may not produce anomalous bulk seismic velocities. A comparison of densities in brucite and other high-pressure phases under mantle conditions shows that the water content of the lower mantle is between 0 and 3 wt pct.

Duffy, Thomas S.↗