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Conventional o-halobiaryl and one-pot tandem protocols have been developed to synthesize naphthalene- and pyrene-containing spirofluorenes. Two pyrene substituents were installed using a Suzuki cross-coupling reaction to produce a series of spirofluorene-functionalized polycyclic aromatic hydrocarbon derivatives, DPSBFF, DPSIPF, DPSDBXF, and DPSFX. A preliminary spin-coated device based on DPSFX:PVK blends exhibits a low turn-on voltage of 4.3 V and deep-blue emission with a current efficiency of 1.1 cd/A.
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http://dx.doi.org/10.1021/ol900978x | DOI Listing |
Pol Merkur Lekarski
September 2025
I. HORBACHEVSKY TERNOPIL NATIONAL MEDICAL UNIVERSITY, TERNOPIL, UKRAINE.
Objective: Aim: To evaluate the state of oxidation processes and morphological changes in the heart of rats with chronic hypodynamia during the development of epinephrine heart damage (EHD)..
Patients And Methods: Materials and Methods: The study was performed on 144 white male Wistar rats.
Sci Adv
September 2025
Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel.
The locus coeruleus-norepinephrine (LC-NE) system regulates arousal and awakening; however, it remains unclear whether the LC does this in a global or circuit-specific manner. We hypothesized that sensory-evoked awakenings are predominantly regulated by specific LC-NE efferent pathways. Anatomical, physiological, and functional modularities of LC-NE pathways involving the mouse basal forebrain (BF) and pontine reticular nucleus (PRN) were tested.
View Article and Find Full Text PDFSci Adv
September 2025
Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Key Laboratory of Plant Immunity, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
Salicylic acid (SA) is a key defense hormone shaped by temperature. High temperatures suppress, while low temperatures enhance, SA biosynthesis and signaling, thereby influencing plant immunity and temperature resilience. This review synthesizes current understanding of how temperature modulates SA pathways and their cross-talk with other hormones to balance growth and defense.
View Article and Find Full Text PDFPLoS One
September 2025
Misión Biológica de Galicia (MBG-CSIC), Pontevedra, Galicia, Spain.
Specialized plant metabolism, particularly phenolic compound production, contributes significantly to the functioning and resilience of mountain ecosystems. Livestock grazing can influence phenolic production, with its effects varying depending on microclimatic factors and soil conditions. Despite the ecological significance of this process, the impact of livestock grazing on phenolic production in alpine plants remains insufficiently explored.
View Article and Find Full Text PDFNeurochem Res
September 2025
Biology and Health Laboratory, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco.
Parkinson's disease (PD) is characterized by impairments in motor control following the degeneration of dopamine-producing neurons located in the substantia nigra pars compacta. Environmental pesticides such as Paraquat (PQ) and Maneb (MB) contribute to the onset of PD by inducing oxidative stress (OS). This study evaluated the therapeutic efficacy of moderate physical activity (PA) on both motor and non-motor symptoms in a Wistar rat model of Paraquat and Maneb (PQ/MB) induced PD.
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