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Synthesis of base-free boriranes and their conversion to borirenes using strong reductant.
Dalton Trans
January 2025
Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
Boriranes, highly strained three-membered cyclic organoboron heterocycles, have emerged as potential synthons for the synthesis of many organoboron species. However, the synthesis of boriranes with tricoordinate, sp-hybridised boron and tetracoordinate, sp-hybridised carbon atoms is very challenging owing to their high Lewis acidity. Herein we describe the isolation of base-free triaminoboriranes from the room-temperature reaction of diaminoalkynes with an aminodistannylborane.
View Article and Find Full Text PDFThe field of π-conjugated organic materials has seen significant advances in recent years. However, enhancing the functionality of well-established, mass-produced compounds remains a considerable challenge, despite being an intriguing strategy for designing high-value organic materials with low production costs. In this context, vat dyes, known for their wide range of colors and extensive use in the textile industry are particularly attractive.
View Article and Find Full Text PDFImpact of glucocorticoids on the therapeutic efficacy of denosumab against osteoporosis in patients with rheumatoid arthritis.
Ther Adv Musculoskelet Dis
January 2025
Division of Rheumatology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 06591, Republic of Korea.
Background: Rheumatoid arthritis (RA) and prolonged high-dose glucocorticoid (GC) treatment are established risk factors for osteoporosis.
Objectives: In this study, we aimed to evaluate the therapeutic efficacy of denosumab according to the GC dose considered to increase the risk of glucocorticoid-induced osteoporosis (GIOP) in patients with RA.
Design: A retrospective analysis of collected data on RA patients with osteoporosis starting denosumab.
Long-term effects of adolescent versus adult nicotine self-administration on cholinergic modulation of dopamine in the nucleus accumbens core.
Drug Alcohol Depend
January 2025
Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA. Electronic address:
Adolescence is a developmental period marked by significant alterations to brain neurobiology and behavior. Adolescent nicotine use disrupts developmental trajectories and increases vulnerability to maladaptive drug-taking in adulthood. The mesolimbic dopamine (DA) system, including the nucleus accumbens core (NAc), mediates the reinforcing effects of nicotine.
View Article and Find Full Text PDFMechanical properties and piecewise constitutive model of fine sandstone in mining area of western China.
Sci Rep
January 2025
Shandong Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao, 266590, China.
Owing to the differences in sedimentary environments in the mining areas of western China, the mechanical properties of rocks in this region are significantly different from those in the central and eastern regions. Therefore, uniaxial cyclic loading-unloading tests were conducted on fine sandstone found in many roof rocks to study the evolution laws of mechanical properties, deformation characteristics, acoustic emission (AE) parameters, and energy under cyclic loading and unloading conditions. The accumulated residual strain, dissipative energy, acoustic emission cumulative ringing counts, and cumulative energy were introduced to characterize the degree of rock damage.
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