Results 81 to 90 of about 48,104 (247)

Formal Synthesis of the Akuammiline Alkaloid (±)‐Strictamine via a (4 + 2) Annulation Reaction With a Donor–Acceptor Cyclobutane

open access: yesHelvetica Chimica Acta, EarlyView.
We report a concise formal synthesis of (±)‐strictamine via a silylium‐catalyzed (4 + 2) annulation of a donor–acceptor cyclobutane, achieved in 13 steps from tryptamine. ABSTRACT The akuammiline alkaloids are complex monoterpene indole natural products with a rigid cage‐like architecture and diverse biological activities.
Clément Tanguy   +2 more
wiley   +1 more source

Diseño de un sistema de riego hidrante parcelario con los métodos por Turnos y Clement: análisis técnico y económico

open access: yesTerra Latinoamericana, 2016
El uso óptimo y sostenible de los recursos hídricos disponibles para riego, requiere que las instalaciones usadas para irrigar permitan administrar el agua con las estrategias de manejo adecuadas a cada situación.
Bartolomé Espinosa Espinosa   +3 more
doaj  

Herding and Anti‐Herding Behaviour in the UK, French and German Stock Markets Before and During the Covid Pandemic

open access: yesInternational Journal of Finance &Economics, EarlyView.
ABSTRACT This paper studies herding and anti‐herding behaviour in three European stock markets before and during the Covid‐19 pandemic by employing both static and dynamic analysis. We examine four different questions related to herding behaviour: (i) Did herding behaviour increase during the pandemic? (ii) Does herding behaviour respond differently in
Dimitrios Asteriou   +3 more
wiley   +1 more source

Beyond the Metrics: Context‐Aware Calibration for Better Drain Flow Modelling

open access: yesIrrigation and Drainage, EarlyView.
ABSTRACT Robust hydrological and water quality modelling is essential for advancing the understanding and management of engineered agricultural subsurface drainage systems. Achieving credible model output hinges on calibration strategies that are both rigorous and context sensitive. At the field scale, accurately capturing the dynamics of nutrient load
R. Caleb Bruhn   +3 more
wiley   +1 more source

A Comparative Study on the Irrigation Suitability of Kerala's Rivers Using Fuzzy AHP and Conventional Methods

open access: yesIrrigation and Drainage, EarlyView.
ABSTRACT Food security in Kerala depends on effective irrigation, but poor‐quality irrigation water poses threats such as salinity, sodicity and reduced soil productivity. Although past assessments have been localised, this study presents the first comprehensive, statewide evaluation of irrigation water suitability across 44 major rivers in Kerala.
Raji Karuna   +2 more
wiley   +1 more source

Microbial contamination and its impact on tea quality

open access: yesEnvironment Conservation Journal
People refer to tea as the 'Queen of beverages' and it is the second most consumed drink worldwide after water. With respect to consumption, tea should be hygienic, visually attractive, and accepted palatably.
Shubhangee Agarwal   +4 more
doaj   +1 more source

Longitudinal associations between play experiences and trajectories of preschoolers' mental health from April–July, 2020

open access: yesJCPP Advances, EarlyView.
Based on data collected monthly from April to July 2020, we found that time spent playing outside and with other children were associated with lower internalising problems across time in preschool‐aged children, whereas more time spent playing alone was associated with more severe internalising problems.
Helen F. Dodd   +3 more
wiley   +1 more source

ParaHox Genes Revisited: From Gut Patterning to Integrated Axial and Neural Organization in Rotifera

open access: yesJournal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
In rotifers, ParaHox genes show a dispersed genomic organization, with Xlox absent across gnathiferans. Exclusive neuronal expression of Gsx and Cdx reveals that ancestral ParaHox genes coordinated neural and epithelial development beyond gut patterning, suggesting an integrated role in early bilaterian body plan organization.
Andreas C. Fröbius   +2 more
wiley   +1 more source

Monitoring mercury across the National Wildlife Refuge System using a biosentinel approach

open access: yesThe Journal of Wildlife Management, EarlyView.
We measured mercury concentrations in 1,356 dragonfly larvae collected from 30 National Wildlife Refuges across the United States and found wide variability among refuges, spanning the full range reported for other protected lands. Using a management‐focused mercury impairment index, 80% of refuges contained sites classified as moderate or higher risk.
Jennifer L. Wilkening   +8 more
wiley   +1 more source

Environmental and temporal factors affecting record white‐tailed deer antler characteristics in Ontario, Canada

open access: yesThe Journal of Wildlife Management, EarlyView.
Antler characteristics are influenced by a combination of genetics, age, and environmental factors, notably habitat quality and resource availability. In this study, we explored how diverse environmental factors, including climate and land cover composition, affect antler size, tine configuration, and the distribution of record‐scoring white‐tailed ...
Brooklyn S. Cars   +5 more
wiley   +1 more source

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