Coupling sprinkler freshwater irrigation with vegetable species selection as a sustainable approach for agricultural production in farmlands with a history of 50-year wastewater irrigation.

Soil contamination and crop risks of heavy metal(loid)s are widely reported after the long-term irrigation of treated wastewater, causing an adverse influence on agricultural sustainability. Here, we collected soils after 50 years of wastewater irrigation to cultivate cabbage (Brassica pekinensis L.), rape (Brassica chinensis L.

Triterpenoids and Flavonoids from the Leaves of Astragalus membranaceus and Their Inhibitory Effects on Nitric Oxide Production.

Four new cycloartane triterpenes, named huangqiyegenins V and VI and huangqiyenins K and L (1-4, resp.), together with nine known triterpenoids, 5-13, and eight flavonoids, 14-21, were isolated from a 70%-EtOH extract of Astragalus membranaceus leaves. The structures of the new compounds were elucidated by detailed spectroscopic analyses, and the compounds were identified as (9β,11α,16β,20R,24S)-11,16,25-trihydroxy-20,24-epoxy-9,19-cyclolanostane-3,6-dione (1), (9β,16β,24S)-16,24,25-trihydroxy-9,19-cyclolanostane-3,6-dione (2), (3β,6α,9β,16β,20R,24R)-16,25-dihydroxy-3-(β-D-xylopyranosyloxy)-20,24-epoxy-9,19-cyclolanostan-6-yl acetate (3), and (3β,6α,9β,16β,24E)-26-(β-D-glucopyranosyloxy)-16-hydroxy-3-(β-D-xylopyranosyloxy)-9,19-cyclolanost-24-en-6-yl acetate (4).

[Ln2(C2O4)2(pyzc)2(H2O)2]n[Ln = Pr (1), Er (2)]: novel two-dimensional lanthanide coordination polymers with 2-pyrazinecarboxylate and oxalate.

We report for the first time hydrothermal synthesis of lanthanide-pyzcH polymers, [Ln2(C2O4)2(pyzc)2 (H2O)2]n [Ln = Pr (1), Er (2)], in which pyzcH was decomposed into C2O42- and thus caused novel two-dimensional hexagonal lattice networks. The magnetic property of polymer 1 has been studied by an approximate treatment being enlightened by McPherson et al. (Inorg.