Absolute configuration at 12 stereocenters in the 36-membered macrocyclic ring portion of poecillastrin C () was disclosed by chemical degradation and NMR analyses of , chemical synthesis, and molecular modeling techniques.
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http://dx.doi.org/10.1021/acs.orglett.4c01632 | DOI Listing |
Anat Histol Embryol
January 2025
Zoology Department, Faculty of Science, Aswan University, Aswan, Egypt.
Anatomically the tongue of Gallus gallus domesticus (Galliformes: Phasianidae) is distinguished into sharp rostral apex, body and root with numerous conical papillae arranged in rows in different sizes in the free portion and the root of the tongue. The epithelium covered the dorsal and ventral surfaces of the free portion and the dorsal surface of the root of the tongue. Numerous orifices of the salivary glands were scattered in the root of the tongue.
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December 2024
Chengdu Normal University, Sichuan Provincial Key Laboratory for Development and Utilization of Characteristic Horticulural Biological Resources, Chengdu Normal University, Chengdu, Sichuan, China.
Background: , a perennial herbaceous medicinal plant, is extensively utilized in the pharmaceutical industry. The growth of is frequently constrained by soil phosphorus availability, as a significant portion of arable land in China suffers from phosphorus deficiency.
Method: This study utilized Ural Fisch as the subject and examined the application of GR24, a synthetic strigolactone, under three phosphorus conditions: none (P1), low (P2), and high (P3).
Sci Total Environ
December 2024
Mistik Askwin Dendrochronology Laboratory, Department of Soil Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada.
Climate conditions throughout the 21st century across much of western Canada's boreal forest have been drier than normal leading to significant impacts on forest productivity and tree growth. Determining the limiting factors of radial growth in common boreal tree species under current and future conditions is crucial to reconcile how they will continue to respond to climate change. In this study, we used a network of 26 white spruce tree-ring chronologies south of its natural range as an artificially constructed trailing edge to assess climate-growth relationships and limiting factors by identifying seasonal climate relationships and using the Vaganov-Shashkin Lite (VS-Lite) model, respectively.
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November 2024
Smart Computing in Civil Engineering Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
This paper investigates the flexural bearing behavior of reinforced concrete beams through experimental analysis and advanced machine learning predictive models. The primary problem centers around understanding how varying compositions of construction materials, particularly the inclusion of recycled aggregates and carbon fiber-reinforced polymer (CFRP), affect the structural performance of concrete beams. Eight beams, including those with natural aggregates, recycled aggregates, fly ash, and CFRP, were tested.
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December 2024
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
Linear alkylbenzene sulfonate (LAS) can be thoroughly mineralized within sufficient oxygen (O), but which is energy intensive and may causes serious foaming problem. Although cometabolism can achieve efficient LAS removal within a wide range of O dosages, how O dosage systematically affects LAS metabolic pathway is still unclear. Here, membrane aerated biofilm reactor (MABR) enabled accurate O delivery and bulk dissolved oxygen (DO) control.
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