55 research outputs found

    Sampling Sites of Dataset

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    In the dataset, we identified a total of 3658 sampling sites in both provinces and prefecture-level cities

    The Final Dataset

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    The dataset comprised a total of 746 studies (encompassing 840 data sets and 3658 populations) across 343 species from 1998 to 2022

    References of Initial Dataset

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    This file contains not only the corresponding references for dataset, but also the discarded references with reasons from the initial inventory

    Two new iridal-type triterpenoids from <i>Iris forrestii</i>

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    Two new iridal-type triterpenoids, named forrestins A and B (1 and 2), were isolated from Iris forrestii Dykes by comprehensive chromatographic methods. The structures of 1 and 2 were elucidated by interpretation of extensive spectroscopic data including 1D and 2D NMR and HRESIMS.</p

    Effect of Al Electronic Configuration on the SiO<sub>2</sub> Thin Film Growth via Catalytic Self-Assembling Deposition

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    A self-assembling deposition process of SiO<sub>2</sub> thin film growth catalyzed by Al with a small silanol precursor was systematically studied using density functional theory. The full catalytic self-assembling deposition (CSD) cycle is divided into two half reactions. In the first half, the trimethylaluminum molecule undergoes a dissociation process on the hydroxylated SiO<sub>2</sub>(001) surface that results in the anchoring of an −AlCH<sub>3</sub> species on the surface and the sequential elimination of two CH<sub>4</sub> molecules. Subsequently, in the second half of the reaction, two reaction routes, i.e., the top-down and the bottom-up routes, were examined to address the growth mechanism of the chain extension with bis­(methoxyl)-monobutoxylsilanol. Our results suggest that the bottom-up route is energetically preferred with a strong influence by the catalytic effect of the seed layer of the Al species. The sp<sup>2</sup> electronic configuration of the Al atom allows its p<sub><i>z</i></sub> orbital to accept electron from the lone pair of the silanol precursor, which facilitates the Al–O formation. The electronic configuration of the Al atom was found to undergo sp<sup>2</sup> → sp<sup>3</sup> → sp<sup>2</sup> evolution cycles along the reaction pathway, each of which produces one layer of a Si–O unit to grow the chain. Our results are consistent with the experimental observations and provide a detailed mechanistic understanding on the CSD processes

    Data set information

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    A file containing the Genbank accessions and popset for each re-analysed data set
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