Chloridobis[N′-(2-meth­oxy­benzyl­idene)-4-nitro­benzohydrazidato-κ2 O,N′](4-methyl­pyridine-κN)cobalt(III)

In the title complex, [Co(C15H12N3O4)2Cl(C6H7N)], the CoIII ion is coordinated by two N atoms and two O atoms from two deprotonated Schiff base ligands, one N atom from a 4-methyl­pyridine ligand and one Cl atom, forming a distorted octa­hedral geometry. The CoIII ion is displaced by 0.038 (2) Å from the equatorial plane towards the axial Cl atom

Two new species of Ismarus Haliday (Hymenoptera, Ismaridae) from Yunnan, China

The genus Ismarus Haliday are rarely collected parasitoids in the small family Ismaridae. In this study, two new species are described from China’s Yunnan Province: Ismarus robustus Chen & Yan, sp. nov. and Ismarus unisulcus Chen & Yan, sp. nov. An updated key to the Chinese species of the genus is provided

Methoxo[N′-(3-meth­oxy-2-oxidobenzyl­idene)benzohydrazidato]oxidovanadium(V)

In the title complex, [V(C15H12N2O4)(CH3O)O], the VV ion exhibits a distorted square-pyramidal coordination geometry; three donor atoms from a hydrazone ligand and one O atom of the deprotonated methanol define the coordination basal plane. The VV ion is displaced by 0.464 (1) Å from the basal plane towards the axial oxide O atom. Intra­molecular O—H⋯N hydrogen bonding occurs. Inter­molecular C—H⋯O hydrogen bonding is also observed in the crystal structure

Enormous lithium isotopic variations of abyssal peridotites reveal fast cooling and Melt/Fluid-rock interactions

Author Posting. © American Geophysical Union, 2020. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Solid Earth 125(9),(2020): e2020JB020393, doi:10.1029/2020JB020393.Fast diffusing Li isotopes provide important insights into the “recent” transient events or processes for both modern and ancient times, but questions remain concerning the large Li isotopic variations of mantle peridotites, which greatly hampers their usage as a geochemical tracer. This study investigates in situ Li content and isotopic profiles of the constituent minerals of abyssal peridotites from the Gakkel Ridge and Southwest Indian Ridge. The complicated and large variations of Li isotopic profiles in Clinopyroxene (Cpx) and Orthopyroxene (Opx) indicate Li isotopic disequilibrium at millimeter scale. The negative correlations of a wide range of Li contents (0.5 to 6.5 ppm) and δ7Li values (−10 to +20‰) of olivine, Opx and Cpx grains/relicts, trace element zoning of Cpx, the occurrence of plagioclase, olivine serpentinization along cracks, together with numerical modeling demonstrate the observed Li characteristics to be a manifestation of high‐temperature mineral‐melt Li diffusion during melt impregnation overprinted by low‐temperature mineral‐fluid Li diffusion during dissolution and serpentinization. The preservation of the Li isotopic diffusion profiles requires rapid cooling of 0.3–5°C/year after final‐stage melt impregnation at the Moho boundary, which is consistent with the low temperature at very slow spreadin g ridges caused by conductive cooling. Compared with the well‐studied melt‐rock interaction process, our study indicates that low‐temperature fluid‐rock interaction can induce Li diffusion even in the visibly unaltered mineral relicts of partially altered rocks.This study was financially supported by the National Science Foundation of China (grant no. 41872058) and the U.S. National Science Foundation grant.2021-03-0

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Development of Ag/MnCeOx catalysts synthesized with ethanol or water for HCHO decomposition at ambient temperature

Formaldehyde, one of important pollutants in the indoor air, has received increasing attention due to damage to human health. To mitigate formaldehyde pollution, MnCeOx mixed oxides were synthesized by solvothermal method with different solvents and complexing agents, including water or ethanol, and citric acid or glycol, and these catalysts were investigated to catalytic oxidation of formaldehyde at ambient temperature under a real indoor environment, as a super low concentration of indoor formaldehyde (1.0 ± 0.5 mg/m3) and the air under static condition. The result indicated that the MnCeOx catalysts prepared with ethanol exhibited higher activities than samples synthesized with H2O. Structure and performance analysis by BET, XRD, SEM, TEM, TG, Raman, XPS, H2-TPR, and O2-TPD displayed that the MnCeOx oxides synthesized with ethanol (instead of using water) greatly promoted the structure and reducibility, resulting in a high activity for HCHO degradation. More than 90% conversion for HCHO degradation was finished at 36 h and no deactivation could be detected by a series of tests. More importantly, the MnCeOx oxides supported by an increasing of Ag exhibited the increased activity. Promoting effect of Ag over the MnCeOx oxides indicated a strong interplay between Ag and MnCeOx greatly affected the property of Ag/MnCeOx catalysts. The HCHO concentration could be decreased to less than 0.08 mg/m3 at 24 h over 2.0 wt%Ag/MnCeOx (E/G). The performance improvement was ascribed to the high reducibility and high distribution of metallic silver, which could increase the surface active oxygen species and improve the oxygen mobility, and also could weaken the surface Mn–O bond

A systemic administration of liposomal curcumin inhibits radiation pneumonitis and sensitizes lung carcinoma to radiation

Radiation pneumonitis (RP) is an important dose-limiting toxicity during thoracic radiotherapy. Previous investigations have shown that curcumin is used for the treatment of inflammatory conditions and cancer, suggesting that curcumin may prevent RP and sensitize cancer cells to irradiation. However, the clinical advancement of curcumin is limited by its poor water solubility and low bioavailability after oral administration. Here, a water-soluble liposomal curcumin system was developed to investigate its prevention and sensitizing effects by an intravenous administration manner in mice models. The results showed that liposomal curcumin inhibited nuclear factor-κB pathway and downregulated inflammatory factors including tumor necrosis factor-α, interleukin (IL)-6, IL-8, and transforming growth factor-β induced by thoracic irradiation. Furthermore, the combined treatment with liposomal curcumin and radiotherapy increased intratumoral apoptosis and microvessel responses to irradiation in vivo. The significantly enhanced inhibition of tumor growth also was observed in a murine lung carcinoma (LL/2) model. There were no obvious toxicities observed in mice. The current results indicate that liposomal curcumin can effectively mitigate RP, reduce the fibrosis of lung, and sensitize LL/2 cells to irradiation. This study also suggests that the systemic administration of liposomal curcumin is safe and deserves to be investigated for further clinical application