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您的检索式：作者名="David Janik"
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| 1 | Beyond direct neighbourhood effects:higher-order interactions improve modelling and predicting tree survival and growth显示文摘It is known that biotic interactions are the key to species coexistence and maintenance of species diversity.Traditional studies focus overwhelmingly on pairwise interactions between organisms,ignoring complex higher-order interactions(HOIs).In this study,we present a novel method of calculating individual-level HOIs for trees,and use this method to test the importance of size-and distance-dependent individual-level HOIs to tree performance in a 25-ha temperate forest dynamic plot.We found that full HOI-inclusive models improved our ability to model and predict the survival and growth of trees,providing empirical evidence that HOIs strongly influence tree performance in this temperate forest.Specifically,assessed HOIs mitigate the competitive direct effects of neighbours on survival and growth of focal trees.Our study lays a foundation for future investigations of the prevalence and relative importance of HOIs in global forests and their impact on species diversity. | Yuanzhi Li Margaret M.Mayfield Bin Wang Junli Xiao Kamil Krai David Janik Jan Holik Chengjin Chu | 2021 | National Science Review2021，8，5： | 2 |
| 2 | Relation between half-cell and fuel cell activity and stability of FeNC catalysts for the oxygen reduction reaction显示文摘FeNC catalysts are promising substitutes of platinum-type catalysts for the oxygen reduction reaction(ORR).While previous research disclosed that high pyrolysis temperatures are required to achieve good stability,it was identified that a trade-off needs to be made regarding the active site density.The central question is,if a good stability can also be reached at milder pyrolysis conditions but longer duration retaining more active sites,while enabling the defect-rich carbon to heal during a long residence time?To address this,a variation of pyrolysis temperatures and durations is used in FeNC fabrication.Carbon morphology and iron species are characterized by Raman spectroscopy and Mössbauer spectroscopy,respectively.Fuel cell(FC)activity and stability data are acquired.The results are compared to ORR activity and selectivity data from rotating ring disc electrode experiments and resulting durability in accelerated stress tests mimicking the load cycle and start-up and shut-down cycle conditions.It is discussed how pyrolysis temperature and duration affect FC activity and stability.But,more important,the results connect the pyrolysis conditions to the required accelerated stress test protocol combination to enable a prediction of the catalyst stability in fuel cells. | Janik Scharf Markus Kübler Vladislav Gridin William David Zacharias Wallace Lingmei Ni Stephen Daniel Paul Ulrike Ingrid Kramm | 2022 | SusMat2022，2，5： | 0 |
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