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Efficient synthesis of dihydronaphthalenes cerium-catalyzed annulation of 1-alkoxy substituted 1-isochromenes with cinnamic acids.
Org Biomol Chem
January 2025
Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education) and Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
Dihydronaphthalenes play a crucial role in bioactive natural products and new drug discovery, and efficient and economic strategies to build them are needed. Herein, we disclose a highly efficient method to prepare dihydronaphthalenes a cerium-catalyzed cycloaddition of 1-isochromenes with cinnamic acids. This newly developed method not only features a broad and low-cost substrate scope and mild conditions but also exhibits very high functional group tolerance, including hydroxyl, borate ester and ester group substituents.
View Article and Find Full Text PDFWarming associated with climate change is driving poleward shifts in the marine habitat of anadromous Pacific salmon ( spp.). Yet the spawning locations for salmon to establish self-sustaining populations and the consequences for the ecosystem if they should do so are unclear.
View Article and Find Full Text PDFComparative analysis and enhancing rainfall prediction models for monthly rainfall prediction in the Eastern Thailand.
MethodsX
June 2025
Department of Royal Rainmaking and Agricultural Aviation, Bangkok 10900, Thailand.
Rainfall prediction is a crucial aspect of climate science, particularly in monsoon-influenced regions where accurate forecasts are essential. This study evaluates rainfall prediction models in the Eastern Thailand by examining an optimal lag time associated with the Oceanic Niño Index (ONI). Five deep learning models-RNN with ReLU, LSTM, GRU (single-layer), LSTM+LSTM, and LSTM+GRU (multi-layer)-were compared using mean absolute error (MAE) and root mean square error (RMSE).
View Article and Find Full Text PDFReproductive strategies in loggerhead sea turtle : polyandry and polygyny in a Southwest Atlantic rookery.
PeerJ
January 2025
Departamento de Ciências Biológicas, Universidade Federal do Espírito Santo, Laboratório de Genética e Evolução Molecular, Vitória, Espírito Santo, Brazil.
Sea turtles are highly migratory and predominantly inhabit oceanic environments, which poses significant challenges to the study of their life cycles. Research has traditionally focused on nesting females, utilizing nest counts and mark-recapture methods, while male behavior remains understudied. To address this gap, previous studies have analyzed the genotypes of females and hatchlings to indirectly infer male genotypes and evaluate the extent of multiple paternity within populations.
View Article and Find Full Text PDFComparative Analysis of the Benefits of Glutathione-Rich Yeast Hydrolysate and Astaxanthin on Growth Performance, Antioxidant Capacity and Lipid Metabolism in Pacific White Shrimp (Litopenaeus vannamei).
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January 2025
Laboratory of Aquatic Nutrition and Feed, College of Fisheries, Guangdong Ocean University, Zhanjiang, China.
Antioxidants, both glutathione (GSH) and astaxanthin (AX), possess beneficial applications in animal growth and antioxidant properties. In this study, three experimental diets with isoproteic and isolipidic were formulated, the control diet (CON), the control diet added with 0.03% Carophyll Pink (contains 10% AX), the control diet added with 0.
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