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Perfect apples or sustainable production?—Consumer perspectives from Germany
(2023-08-23)
In recent years, environmental problems, such as resource depletion and biodiversity loss, have come to the forefront of society's attention. Consumption of fruits and vegetables from extensive production systems could decrease food loss and increase biodiversity and more sustainable resource use. However, fruits and vegetables from extensive production systems are not always of perfect external quality, and hence, rejected by consumers. To increase acceptance of imperfect fruits, this study aims to better understand ...
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Bond strength, failure criteria and calculation methods for adhesively bonded timber–concrete composites
(2024-04)
The bond strength of adhesively bonded timber–concrete composites (ATCC) with prefabricated concrete elements is usually described using the shear strength of the timber. This approach, however, often fails to consider the actual failure modes of the bondline and also the interaction between shear stresses and stresses perpendicular to the bondline has not yet been comprehensively understood. To address this limitation, a reliable calculation method is required, where stress determination, failure criterion, and ...
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Presence of keel bone damage in laying hens, pullets and roosters of local chicken breeds
(2024-01-26)
In commercial laying hens, keel bone damage (KBD) is a severe health and welfare problem leading to pain, reduced mobility and decreased laying performance. Flocks of all production systems and hybrid lines can be affected. KBD is a multifactorial welfare issue and, among other factors, associated with a high laying performance which negatively affects the calcium deposit in the medullary bones. Therefore, mature hens of local breeds with much lower egg production than commercial hybrids may be expected to show less ...
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Controlled Ring Opening of a Tetracyclic Tetraphosphane with Twofold Metallocene Bridging
(2024-02-19)
A direct route to a doubly ferrocene bridged tetracyclic tetraphosphane 1 was developed via reductive coupling of Fe(CpPCl₂)₂ (2 a), where a chlorine terminated linear P₄-compound 3 could be identified as an intermediate. Selective P−P bond activation was further achieved by reacting 1 with elemental selenium or [Cp*Al]₄, where regioselective insertion of Se or Al atoms resulted in ferrocenylene bridged [P₄Se] (4) or [P₄Al] (7) moieties. Compound 7 can be transformed to a hydrogen terminated linear P₄ species, 8, ...
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Empirical research on polycentric governance: Critical gaps and a framework for studying long-term change
(2023-11-08)
Polycentric governance (PG) describes governance systems characterized by multiple, interdependent centers of decision-making, offering an alternative to centralized governance models. PG is often assumed to be effective at helping policy actors address complex collective action problems, but burgeoning empirical literature on PG shows that it is not a panacea – PG is associated with both positive and negative governance outcomes. In this article, we ask: what do we know about why PG performs well in some cases but ...
Aufsatz
Perceptions and sociocultural factors underlying adoption of conservation agriculture in the Mediterranean
(2023-08-31)
The Mediterranean region is facing major challenges for soil conservation and sustainable agriculture. Conservation agriculture (CA), including reduced soil disturbance, can help conserve soils and improve soil fertility, but its adoption in the Mediterranean region is limited. Examining farmers’ perceptions of soil and underlying sociocultural factors can help shed light on adoption of soil management practices. In this paper, we conducted a survey with 590 farmers across Morocco, Spain and Tunisia to explore concepts ...
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Does intense tax competition boost public acceptance for inter-municipal cooperation? Evidence from a survey among German citizens and local politicians
(2024-03-28)
Intense tax competition among local governments limits their potential for tax revenues. Inter-municipal cooperation (IMC) in general and joint business parks in particular constitute a platform to coordinate local tax rates with neighboring municipalities to reduce tax competition. We ask whether local politicians and citizens are aware of this logic and whether they account for it. Using survey data from German municipalities, we find citizens’ support for joint business parks to increase in the intensity of tax ...
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Klarifizieren und Konfrontieren – oder besser doch nicht?
(2024-03-01)
Wenn wir über das Verschieben des Sagbaren sprechen, dann geht es auch um Selbstreflexion: Wo zensieren wir uns selbst und haben unseren Anteil daran, dass zentrale Inhalte aus dem Beratungskontext exkommuniziert werden? In arbeitsweltlichen Kontexten stellt sich immer wieder die Frage, wie ich meine Gegenübertragungs-Phänomene nutze, wenn ich ihrer überhaupt gewahr werde. Der Beitrag stellt an vier Beispielen gelungene und weniger geglückte Konfrontationen dar und stellt Überlegungen an, wie konstruktive Klarifikation ...
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Fluorescence microscopic investigation of PCE superplasticiser adsorption in calcined clay blended cement
(2024-03-31)
Global efforts to minimise carbon dioxide emissions are also leading to attempts to use calcined clays (CC) as a partial substitute for cement in concrete. While the hydration mechanism of such CC blended cements is now well understood, the range of effective admixtures like polycarboxylate ethers (PCE) is limited. There are PCE types that promise relatively high effectiveness, but the mechanisms of action are not yet sufficiently understood. For a detailed understanding of the adsorption of such PCEs, spatially ...