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Syntheses and Characterizations of Two New Cadmium Complexes Based on Oxalate
Ming-San Miao,Bo-Lin Cheng,Zhen Liang,Huai-Xia Yang,Xiang-Ru Meng 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.9
Two new Cd(II) complexes, {[Cd(COO)2]2·2H2O}n (1) and {[CdCl(COO)2(Hbmi)]·H2O} n (2), were obtained through the reactions of oxalic acid (H2ox) with CdCl2 ·2.5H2O in the presence of 1-[(benzoimidazol-yl)methyl]-1H-tetrazole (bmt) or 1-[(benzoimidazol-yl)methyl]-1H-imidazol (bmi). Single-crystal X-ray diffraction shows that complex 1 has a 3-D structure with the topological notation of (48 · 62)(46 · 66 · 83)(42 · 84), in which the oxalate displays two kinds of coordination modes: formation of the layers (μ6-ox) and linking the layers (μ4-ox). In complex 2, oxalates bridge Cd(II) ions, forming a 1-D chain, and (Hbmi)+ cations coordinate to the Cd(II) ions in monodentate mode and hang at two sides of the main chain. This indicates that subtle modification of the N-donor ligands can result in complexes with different compositions and architectures. Moreover, their IR spectra, PXRD (powder X-ray diffraction) patterns, thermogravimetric analyses, and fluorescence properties are also investigated.
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Pathological Impact on the Phyllosphere Microbiota of Artemisia argyi by Haze
( Yu-zhu Zhang ),( De-yu Jiang ),( Chi Zhang ),( Kun Yang ),( Huai-fu Wang ),( Xiu-wen Xia ),( Wei-jun Ding ) 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.4
The pathological impact of haze upon the phyllosphere microbiota awaits investigation. A moderate degree of haze environment and a clean control were selected in Chengdu, China. Artemisia argyi, a ubiquitously distributed and extensively applied Chinese herb, was also chosen for experiment. Total genome DNA was extracted from leaf samples, and for metagenome sequencing, an Illumina HiSeq 2500 platform was applied. The results showed that the gene numbers of phyllosphere microbiota derived from haze leaves were lower than those of the clean control. The phyllosphere microbiota derived from both haze and clean groups shared the same top ten phyla; the abundances of Proteobacteria, Actinomycetes and Anorthococcuso of the haze group were substantially increased, while Ascomycetes and Basidiomycetes decreased. At the genus level, the abundances of Nocardia, Paracoccus, Marmoricola and Knoelia from haze leaves were markedly increased, while the yeasts were statistically decreased. KEGG retrieval demonstrated that the functional genes were most annotated to metabolism. An interesting find of this work is that the phyllosphere microbiota responsible for the synthesis of primary and secondary metabolites in A. argyi were significantly increased under a haze environment. Relatively enriched genes annotated by eggNOG belong to replication, recombination and repair, and genes classified into the glycoside hydrolase and glycosyltransferase enzymes were significantly increased. In summary, we found that both structure and function of phyllosphere microbiota are globally impacted by haze, while primary and secondary metabolites responsible for haze tolerance were considerably increased. These results suggest an adaptive strategy of plants for tolerating and confronting haze damage.
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