Mechanistic Insight into Para-Substituent Control of Thermal Half-Lives in Arylazopyrazole Photoswitches. [PDF]
Angew Chem Int Ed EnglHerein we provide an overview of photochromic and photophysical properties of a broad variety of arylazo‐1,3,5‐trimethylpyrazole photoswitches, including the influence of 23 different para‐substituents. Measured half‐lives correlated in a Hammet plot are rationalized by density functional theory calculations, revealing the underlying thermal ...
Schlögl K +6 more
europepmc +3 more sources
Quantifying phase magnitudes of open-source focused-probe 4D-STEM ptychography reconstructions. [PDF]
J MicroscAbstract Accurate computational ptychographic phase reconstructions are enabled by fast direct‐electron cameras with high dynamic ranges used for four‐dimensional scanning transmission electron microscopy (4D‐STEM). The availability of open software packages is making such analyses widely accessible, and especially when implemented in Python, easy to ...
Susi T.
europepmc +2 more sources
Novel Approach to Inter-Onset-Interval Ratio Uncovers Music-Like Rhythmic Patterns in Budgerigar (Melopsittacus undulatus) Warble Song. [PDF]
Ann N Y Acad SciRecent work on non‐human animal vocalizations has offered new insights into rhythmicity. In an attempt to improve upon methods commonly used in animal rhythm research, we investigated the rhythmic structure of budgerigar song. Our proposed statistical approach showed rhythmicity in human music but not language, and uncovered non‐random structured ...
van der Aa J +3 more
europepmc +2 more sources
Mountain colonization precedes shifts away from bee pollination in Melastomataceae. [PDF]
New PhytolSummary Shifts among different groups of pollinators are central in the evolution of flowering plants, yet mechanisms underlying pollinator shifts remain unclear. Environment‐induced reduction in pollinator availability and hence efficiency may destabilize ancestral plant–pollinator interactions and trigger shifts to new, more efficient pollinators ...
Kopper C +2 more
europepmc +2 more sources
Identification of an Activity Selector for the Nitroso-Forming Activity in Bacterial Type-III Copper Enzymes. [PDF]
Angew Chem Int Ed EnglSmall but crucial difference: Type‐III copper enzymes, like tyrosinase (TYR) and o‐aminophenol oxidase (AO), catalyze the oxidation of o‐aminophenols (AP) to quinone imines. Unlike TYR, AO can further oxidize AP to nitrosophenols. This nitroso‐forming activity is controlled by a key amino acid near the Cu(A) ion.
Le Xuan H, Panis F, Rompel A.
europepmc +2 more sources
Die beiden Afrikanischen Konferenzen in Accra 1958: Ghana und Algerien zwischen Annäherung und Differenz [PDF]
Stichproben, 2021 Ende der 1950er Jahre verdichtete sich die Vernetzung antikolonialer und antiimperialistischer AktivistInnen mit der Etablierung trans- und internationaler (Aus-)Handlungsräume im Globalen Süden.
Lisa Hoppel
doaj +1 more source
Tanj’Afrique“ Transregionale Verflechtungen einer boomenden Metropole [PDF]
Stichproben, 2021 Der Beitrag untersucht die Verbindungen der nordmarokkanischen Metropole Tanger mit dem subsaharischen Afrika. In den letzten anderthalb Jahrzehnten erlebte die Stadt einen deutlichen Entwicklungsschub, der sich unter anderem in der Etablierung eines ...
Steffen Wippel
doaj +1 more source
A Biographical Essay on Ruth Guimarães: A Black Writer in Brazil in the 1940s [PDF]
Stichproben, 2020 This essay presents insights into the early career of Ruth Guimarães (1920-2014), the Afro-Brazilian writer from the São Paulo area renowned for her depiction of the Brazilian countryside.
Silvio Tamaso D'Onofrio +1 more
doaj +1 more source
Co-flowering with congeners does not affect buzz-pollinator specialization and pollination performance in Rhexia mariana, but does affect floral trait variance. [PDF]
Am J BotAbstract Premise Pollinator‐mediated plant‐plant interactions may be negative (i.e., competition, reproductive interference) or positive (i.e., facilitation). Especially when co‐flowering with close relatives (e.g., congeners), negative interactions through reproductive interference may be strong and result in floral trait divergence and increased ...
Dellinger AS +4 more
europepmc +2 more sources
Does the abiotic environment influence the distribution of flower and fruit colors? [PDF]
Am J BotAbstract Premise Color in flowers and fruits carries multiple functions, from attracting animal partners (pollinators, dispersers) to mitigating environmental stress (cold, drought, UV‐B). With research historically focusing on biotic interactions as selective agents, however, it remains unclear whether abiotic stressors impact flower and fruit colors ...
Dellinger AS +3 more
europepmc +2 more sources