keyword
https://read.qxmd.com/read/38546915/effects-of-several-auxiliary-acceptors-and-anchoring-groups-on-charge-transfer-and-photophysical-properties-of-d-a-%C3%AF-a-type-dsscs-a-dft-study
#1
JOURNAL ARTICLE
Mingjianshuo Gong, Lingpeng Zeng, Wenbo Wang, Xuanchen Dong, Zhenshuo Yu, Songhao Wang, Yi Yang
In this paper, we performed theoretical studies on the twelve D-A-π-A type organic dyes (G-1 ~ G-3, M-1 ~ M-3, J-1 ~ J-3, and S-1 ~ S-3) with 9-phenylcarbazole as the electron donor in anticipation of the application of these dyes in dye-sensitized solar cells (DSSCs). DFT and TD-DFT methods are applied to investigate in detail the molecular geometries, frontier molecular orbitals (FMOs), absorption spectra, charge density difference (CDD), and transition density matrix (TDM) of several dyes...
March 28, 2024: Journal of Fluorescence
https://read.qxmd.com/read/38546687/a-rare-case-of-hereditary-multiple-exostoses-in-a-woman
#2
JOURNAL ARTICLE
Ranya Alawy Ghamri
Hereditary multiple exostosis (HME) is a rare genetic disorder characterized by multiple bony spurs or lumps, commonly affecting the long bones. This case report exposes the clinical presentation, diagnosis, and management of HME in a 28-year-old female nurse, who initially presented with persistent bilateral knee pain. After extensive evaluation involving orthopaedic and oncology specialists, the diagnosis of HME was made. Despite the discovery of multiple exostoses, the patient reported improvement following a tailored physiotherapy regimen...
March 2024: Orthopaedic Nursing
https://read.qxmd.com/read/38546218/unveiling-the-genomic-landscape-of-salmonella-enterica-serotypes-typhimurium-newport-and-infantis-in-latin-american-surface-waters-a-comparative-analysis
#3
JOURNAL ARTICLE
Zhao Chen, Magaly Toro, Andrea I Moreno-Switt, Aiko D Adell, Enrique J Delgado-Suárez, Raquel R Bonelli, Celso J B Oliveira, Angélica Reyes-Jara, Xinyang Huang, Brett Albee, Christopher J Grim, Marc Allard, Sandra M Tallent, Eric W Brown, Rebecca L Bell, Jianghong Meng
Surface waters are considered ecological habitats where Salmonella enterica can persist and disseminate to fresh produce production systems. This study aimed to explore the genomic profiles of S. enterica serotypes Typhimurium, Newport, and Infantis from surface waters in Chile, Mexico, and Brazil collected between 2019 and 2022. We analyzed the whole genomes of 106 S . Typhimurium, 161 S . Newport, and 113 S . Infantis isolates. Our phylogenetic analysis exhibited distinct groupings of isolates by their respective countries except for a notable case involving a Chilean S ...
March 28, 2024: Microbiology Spectrum
https://read.qxmd.com/read/38545966/mono-component-pure-white-light-emitting-diodes-based-on-eco-friendly-zncugas-in-zns-quantum-dots-with-near-unity-quantum-yield-and-balanced-red-green-blue-centers
#4
JOURNAL ARTICLE
Jiangyuan Jiang, Shuai Zhang, Qingsong Shan, Linxiang Yang, Jing Ren, Yongjin Wang, Seokwoo Jeon, Hengyang Xiang, Haibo Zeng
White light-emitting diodes (WLEDs) are the key component in next-generation lighting and display devices. The inherent toxicity of Cd/Pb-based quantum dots (QDs) limits the further application in WLEDs. Recently, more attention has been focused on eco-friendly QDs and their WLEDs, especially the phosphor-free WLEDs based on mono-component, which profits from bias-insensitive color stability. However, the imbalanced carrier distribution between red-green-blue luminescent centers, even the absence of a certain luminescent center, hinders their balanced and stable photoluminescence/electroluminescence (PL/EL)...
March 28, 2024: Advanced Materials
https://read.qxmd.com/read/38545942/regio-and-stereo-selective-isomerization-of-borylated-1-3-dienes-enabled-by-selective-energy-transfer-catalysis
#5
JOURNAL ARTICLE
Byeongseok Kweon, Lukas Blank, Julia Soika, Amélia Messara, Constantin Daniliuc, Ryan Gilmour
Configurationally-defined dienes are pervasive across the bioactive natural product spectrum, where they typically manifest themselves as sorbic acid-based fragments. These C5 motifs reflect the biosynthesis algorithms that facilitate their construction. To complement established biosynthetic paradigms, a chemical platform to facilitate the construction of stereochemically defined, functionalizable dienes by light-enabled isomerization has been devised. Enabled by selective energy transfer catalysis, a variety of substituted β-boryl sorbic acid derivatives can be isomerized in a regio- and stereo-selective manner (up to 99:1)...
March 28, 2024: Angewandte Chemie
https://read.qxmd.com/read/38544302/robust-narrow-band-nanorods-leds-with-luminous-efficacy-200%C3%A2-lm-w-next-generation-of-efficient-solid-state-lighting
#6
JOURNAL ARTICLE
Chengbin Kang, Maksym F Prodanov, Jianxin Song, Kumar Mallem, Zebing Liao, Valerii V Vashchenko, Abhishek K Srivastava
Energy-efficient white light-emitting diodes (LEDs) are in high demand across the society. Despite the significant advancements in the modern lighting industry based on solid-state electronics and inorganic phosphor, solid-state lighting (SSL) continues to pursue improved efficiency, saturated color performance, and longer lifetime. Here in this article, robust, narrow emission band nanorods (NRs) are disclosed with tailored wavelengths, aiming to enhance the color rendering index (CRI) and luminous efficacy (LE)...
March 27, 2024: Small
https://read.qxmd.com/read/38544175/optically-controlled-gain-modulation-for-microwave-metasurface-antennas
#7
JOURNAL ARTICLE
Charlotte Tripon-Canseliet, Cristian Della Giovampaola, Nicolas Pavy, Jean Chazelas, Stefano Maci
Over the past decade, metasurfaces (MTSs) have emerged as a highly promising platform for the development of next-generation, miniaturized, planar devices across a wide spectrum of microwave frequencies. Among their various applications, the concept of MTS-based antennas, particularly those that are based on surface wave excitation, represents a groundbreaking advancement with significant implications for communication technologies. However, existing literature primarily focuses on MTS configurations printed on traditional substrates, largely overlooking the potential benefits of employing photosensitive substrates...
March 16, 2024: Sensors
https://read.qxmd.com/read/38544104/research-on-fiber-optic-optical-coherence-ranging-system-based-on-laser-frequency-scanning-interferometry
#8
JOURNAL ARTICLE
Yingjian Zhou, Yanhong Yuan, Meixue Su
In this paper, a system for absolute distance measurement is proposed based on laser frequency scanning interferometry (FSI). The system utilizes a digitally tunable laser as the light source and employs synchronized pulses to drive an analog-to-digital converter (ADC) for interference signal acquisition. The frequency domain demodulation for absolute distance measurement is achieved through a three-spectrum line interpolation method based on the Hanning window. The system takes advantage of the spatial filtering characteristics of a single-mode optical fiber and the diffuse reflection properties of light to achieve a high integration of the prism system that forms the interference optical path...
March 13, 2024: Sensors
https://read.qxmd.com/read/38542540/excitation-of-terahertz-spoof-surface-plasmons-on-a-roofed-metallic-grating-by-an-electron-beam
#9
JOURNAL ARTICLE
Yongqiang Liu, Xutao Zhang, Yan Wang, He Cai, Jinhai Sun, Yong Zhu, Liangsheng Li
In this paper, both fundamental SSP modes on a roofed metallic grating and its effective excitation of the bounded SSP mode by an injected electron beam on the structure are numerically examined and investigated in the THz regime. Apart from the bounded SSP mode on the metallic grating with open space, the introduced roofed metallic grating can generate a closed waveguide mode that occupies the dispersion region outside the light line. The closed waveguide mode shifts gradually to a higher frequency band with a decreased gap size, while the bounded SSP mode line becomes lower...
February 21, 2024: Micromachines
https://read.qxmd.com/read/38540703/n-glycosylation-as-a-modulator-of-protein-conformation-and-assembly-in-disease
#10
REVIEW
Chiranjeevi Pasala, Sahil Sharma, Tanaya Roychowdhury, Elisabetta Moroni, Giorgio Colombo, Gabriela Chiosis
Glycosylation, a prevalent post-translational modification, plays a pivotal role in regulating intricate cellular processes by covalently attaching glycans to macromolecules. Dysregulated glycosylation is linked to a spectrum of diseases, encompassing cancer, neurodegenerative disorders, congenital disorders, infections, and inflammation. This review delves into the intricate interplay between glycosylation and protein conformation, with a specific focus on the profound impact of N-glycans on the selection of distinct protein conformations characterized by distinct interactomes-namely, protein assemblies-under normal and pathological conditions across various diseases...
February 27, 2024: Biomolecules
https://read.qxmd.com/read/38539895/light-pollution-and-oxidative-stress-effects-on-retina-and-human-health
#11
REVIEW
Rocío Salceda
Visible light refers to the frequencies within the electromagnetic spectrum that humans can see, encompassing radiation with wavelengths falling between 380 nm to 760 nm. The energy of a single photon increases with its frequency. In the retina, photoreceptor cells contain light-sensitive pigments that absorb light and convert it into electrical stimuli through a process known as phototransduction. However, since the absorption spectrum of photoreceptors closely aligns with blue light (ranging from 400 to 500 nm), exposure to high light intensities or continuous illumination can result in oxidative stress within these cells, leading to a loss of their functionality...
March 18, 2024: Antioxidants (Basel, Switzerland)
https://read.qxmd.com/read/38539660/neurofilaments-light-chain-in-neurodegenerative-dementias-a-review-of-imaging-correlates
#12
REVIEW
Chiara Gallingani, Chiara Carbone, Manuela Tondelli, Giovanna Zamboni
Neurofilaments light chain (NfLs) are currently recognized as a marker of axonal injury and degeneration. Their measurement in biological fluids has a promising role in the diagnosis, prognosis, and monitoring of the therapeutic response in neurological diseases, including neurodegenerative dementias. In recent years, their relationship with clinical phenotypes and measures of disease severity has been extensively studied. Here, we reviewed studies investigating the association between NfLs and imaging measures of grey matter (GM) and white matter (WM) damage in neurodegenerative dementias...
March 13, 2024: Brain Sciences
https://read.qxmd.com/read/38539137/complex-interplay-of-neurodevelopmental-disorders-ndds-fractures-and-osteoporosis-a-mendelian-randomization-study
#13
JOURNAL ARTICLE
Zefang Li, Xueqiang Wu, Hanzheng Li, Cong Bi, Can Zhang, Yiqing Sun, Zhaojun Yan
BACKGROUND: Neurodevelopmental disorders (NDDs), such as Attention-Deficit/Hyperactivity Disorder (ADHD), Autism Spectrum Disorder (ASD), and Tourette Syndrome (TS), have been extensively studied for their multifaceted impacts on social and emotional well-being. Recently, there has been growing interest in their potential relationship with fracture risks in adulthood. This study aims to explore the associations between these disorders and fracture rates, in order to facilitate better prevention and treatment...
March 27, 2024: BMC Psychiatry
https://read.qxmd.com/read/38536928/bond-length-dependence-of-attosecond-ionization-delays-in-o-2-arising-from-electron-correlation-to-a-shape-resonance
#14
JOURNAL ARTICLE
Daniel Hammerland, Thomas Berglitsch, Pengju Zhang, Tran Trung Luu, Kiyoshi Ueda, Robert R Lucchese, Hans Jakob Wörner
We experimentally and theoretically demonstrate that electron correlation can cause the bond-length sensitivity of a shape resonance to induce an unexpected vibrational state-dependent ionization delay in a nonresonant channel. This discovery was enabled by a high-resolution attosecond-interferometry experiment based on a 400-nm driving and dressing wavelength. The short-wavelength driver results in a 6.2-electron volt separation between harmonics, markedly reducing the spectral overlap in the measured interferogram...
March 29, 2024: Science Advances
https://read.qxmd.com/read/38535678/germanium-based-optical-coatings-for-aesthetic-enhancement-with-low-radiofrequency-attenuation
#15
JOURNAL ARTICLE
Enrique Carretero, Rocío Chueca, Rafael Alonso
This work focused on developing optical coatings for decorative applications that remain transparent in the radiofrequency range. To achieve this, a combination of dielectric material (silicon-aluminum nitride, SiAlNx ) and low-electrical-conductivity semiconductor material (germanium) was utilized. Germanium plays a crucial role in providing absorption in the visible spectrum, facilitating the design of coatings with various aesthetic appearances, while allowing for control over their transmittance. The optical properties of thin germanium layers were thoroughly characterized and leveraged to create multilayer designs with diverse aesthetic features...
March 15, 2024: Nanomaterials
https://read.qxmd.com/read/38535649/single-mode-control-and-individual-nanoparticle-detection-in-the-ultraviolet-region-based-on-boron-nitride-microdisk-with-whispering-gallery-mode
#16
JOURNAL ARTICLE
Jiaxing Li, Qiang Li, Ransheng Chen, Qifan Zhang, Wannian Fang, Kangkang Liu, Feng Li, Feng Yun
Optical microcavities are known for their strongly enhanced light-matter interactions. Whispering gallery mode (WGM) microresonators have important applications in nonlinear optics, single-mode output, and biosensing. However, there are few studies on resonance modes in the ultraviolet spectrum because most materials with high absorption properties are in the ultraviolet band. In this study, the performance of a microdisk cavity based on boron nitride (BN) was simulated by using the Finite-difference time-domain (FDTD) method...
March 11, 2024: Nanomaterials
https://read.qxmd.com/read/38535634/data-center-four-channel-multimode-interference-multiplexer-using-silicon-nitride-technology
#17
JOURNAL ARTICLE
Ophir Isakov, Aviv Frishman, Dror Malka
The operation of a four-channel multiplexer, utilizing multimode interference (MMI) wavelength division multiplexing (WDM) technology, can be designed through the cascading of MMI couplers or by employing angled MMI couplers. However, conventional designs often occupy a larger footprint, spanning a few millimeters, thereby escalating the energy power requirements for the photonic chip. In response to this challenge, we propose an innovative design for a four-channel silicon nitride (Si3 N4 ) MMI coupler with a compact footprint...
March 8, 2024: Nanomaterials
https://read.qxmd.com/read/38534737/inhibition-of-nkcc1-ameliorates-anxiety-and-autistic-behaviors-induced-by-maternal-immune-activation-in-mice
#18
JOURNAL ARTICLE
Hai-Long Zhang, Shufen Hu, Shu-Ting Qu, Meng-Dan Lv, Jun-Jun Wang, Xin-Ting Liu, Jia-He Yao, Yi-Yan Ding, Guang-Yin Xu
Autism spectrum disorder (ASD) is thought to result from susceptibility genotypes and environmental risk factors. The offspring of women who experience pregnancy infection have an increased risk for autism. Maternal immune activation (MIA) in pregnant animals produces offspring with autistic behaviors, making MIA a useful model for autism. However, how MIA causes autistic behaviors in offspring is not fully understood. Here, we show that NKCC1 is critical for mediating autistic behaviors in MIA offspring. We confirmed that MIA induced by poly(I:C) infection during pregnancy leads to autistic behaviors in offspring...
February 28, 2024: Current Issues in Molecular Biology
https://read.qxmd.com/read/38534634/fungal-endophthalmitis-clinical-characteristics-pathogens-and-factors-affecting-visual-outcome
#19
JOURNAL ARTICLE
Xiaoxia Li, Zhi Chen, Xiuwen Zhang, Zimei Zhou, Maureen Boost, Taomin Huang, Xingtao Zhou
AIMS: The aims of this study are to investigate the etiology, microbiological spectrum, and risk factors associated with visual outcomes of fungal endophthalmitis (FE) in a tertiary eye specialty hospital in Shanghai, China. METHODS: This was a retrospective, single-center case series. The clinical characteristics, etiology, microbiological spectrum, and management, as well as the visual outcomes, were analyzed. Logistic regression was used to analyze the factors related to visual outcomes...
February 20, 2024: Antibiotics
https://read.qxmd.com/read/38534209/performance-characteristics-and-limitations-of-the-available-assays-for-the-detection-and-quantitation-of-monoclonal-free-light-chains-and-new-emerging-methodologies
#20
REVIEW
Hannah V Giles, Kamaraj Karunanithi
Light chain measurements form an essential component of the testing strategy for the detection and monitoring of patients with suspected and/or proven plasma cell disorders. Urine-based electrophoretic assays remain at the centre of the international guidelines for response assessment but the supplementary role of serum-free light chain (FLC) assays in response assessment and the detection of disease progression due to their increased sensitivity has been increasingly recognised since their introduction in 2001...
March 11, 2024: Antibodies
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