Dataset Information

Chemical Characterization of a Volatile Dubnium Compound, DbOCl₃.

ABSTRACT: The formation and the chemical characterization of single atoms of dubnium (Db, element 105), in the form of its volatile oxychloride, was investigated using the on-line gas phase chromatography technique, in the temperature range 350-600 °C. Under the exactly same chemical conditions, comparative studies with the lighter homologues of Group 5 in the Periodic Table clearly indicate the volatility sequence being NbOCl₃ > TaOCl₃ ≥ DbOCl₃ . From the obtained experimental results, thermochemical data for DbOCl₃ were derived. The present study delivers reliable experimental information for theoretical calculations on chemical properties of transactinides.

SUBMITTER: Chiera NM

PROVIDER: S-EPMC8456785 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature

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Publications

Chemical Characterization of a Volatile Dubnium Compound, DbOCl3.

Chiera Nadine M NM Sato Tetsuya K TK Eichler Robert R Tomitsuka Tomohiro T Asai Masato M Adachi Sadia S Dressler Rugard R Hirose Kentaro K Inoue Hiroki H Ito Yuta Y Kashihara Ayuna A Makii Hiroyuki H Nishio Katsuhisa K Sakama Minoru M Shirai Kaori K Suzuki Hayato H Tokoi Katsuyuki K Tsukada Kazuaki K Watanabe Eisuke E Nagame Yuichiro Y

Angewandte Chemie (International ed. in English) 20210702 33

The formation and the chemical characterization of single atoms of dubnium (Db, element 105), in the form of its volatile oxychloride, was investigated using the on-line gas phase chromatography technique, in the temperature range 350-600 °C. Under the exactly same chemical conditions, comparative studies with the lighter homologues of Group 5 in the Periodic Table clearly indicate the volatility sequence being NbOCl3 > TaOCl3 ≥ DbOCl3 . From the obtained experim ...[more]

PMID: 33978998

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Project description:Drought stress is a major constraint on crop production. While Trichoderma fungi are widely recognized for enhancing plant tolerance to abiotic stresses, the fungal molecules responsible for these protective effects remain poorly defined. In this study, we investigated the role of 6-pentyl-a-pyrone (6PP), a volatile compound produced by diverse Trichoderma spp., in modulating plant responses to water deficit. Dwarf bean (Phaseolus vulgaris) seedlings grown from seeds coated with a carrier polymer delivering 6PP were significantly more tolerant to drought stress than seedlings from seeds coated with the polymer alone (control), exhibiting increased leaf area, root length, chlorophyll content, and photosynthetic rate. To elucidate the mechanisms induced by this molecule, comparative transcriptome analyses were performed in the presence and absence of 6PP under both wellwatered and drought conditions; only 49 DEGs were detected under wellwatered conditions. In contrast, 476 expressed genes were identified in drought-stressed plants grown from 6PP-coated seeds, indicating substantial transcriptional reprogramming. 6PP treatment reprogrammed stress-responsive gene networks, including pathways associated with photosynthesis, carbohydrate metabolism, phosphorylation-mediated signaling, defense responses, and oxidative stress regulation. In addition, drought-stressed plants treated with 6PP exhibited enhanced MAPK phosphorylation, providing protein-level evidence for activation of phosphorylation-mediated signaling pathways associated with stress tolerance. Functional enrichment analyses further highlight secondary metabolite pathways, including those for phenylpropanoid and flavonoid biosynthesis, suggesting enhanced production of protective compounds and maintenance of photosynthetic activity under drought stress. Several stress-related genes were modulated prior to drought exposure, indicating a possible priming effect. Collectively, our findings identify 6PP as a potential signaling molecule contributing to enhanced drought resilience and provide new insights into the molecular basis of Trichoderma-mediated stress protection.

Dataset Information

Chemical Characterization of a Volatile Dubnium Compound, DbOCl₃.

Publications

Chemical Characterization of a Volatile Dubnium Compound, DbOCl<sub>3</sub>.

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