bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of gamma irradiation on trichromatic values of spices
Authors: Horváthová J. , Suhaj M. , Polovka M. 
Published: June 2007

AbstractThe effect of γ-irradiation on trichromatic color values L*, a*, and b* was determined in black pepper, oregano, and allspice samples irradiated at average doses from 5 kGy to 30 kGy. Trichromatic values a* measured in methanol extracts of treated spices immediately after the irradiation process were significantly changed, but the subsequent storage of allspice and oregano caused much more distinctive alteration of these color values than the irradiation itself. Additionally, the differences in redness between the reference (non-irradiated) allspice and oregano samples and samples treated by γ-radiation gradually disappeared during the storage period. On the contrary, the post-irradiation storage of black pepper samples did not reveal any changes of a* values.
Homo- and heteronuclear complexes of a new, vicinal dioxime ligand
Authors: Serin M. , Karayel G. , Gup R. 
Published: June 2007

AbstractA new symmetrical vicinal dioxime, N,N′-bis-{4-[[(2-hydroxyphenyl)methylene]hydrazinecarbonyl]phenyl}diaminoglyoxime (LH4), was prepared by reacting anti-dichloroglyoxime with salicylaldehyde 4-aminobenzoylhydrazone. The reaction of ligand with Ni2+ salts gave mono-and homopentanuclear complexes, [Ni(LH3)2] and [Ni5(LH)2X2]. Furthermore, heteropentanuclear complexes of dioxime ligand, [Cu4Ni(LH)2X4], were prepared by the reaction of [Ni(LH3)2)] with Cu2+ salt and a monodentate ligand (X = SCN−, CN−, or N3−). The structures of both the new symmetrical vicinal dioxime and its complexes were identified by elemental analyses, IR, 1H NMR, UV-VIS spectra, and magnetic susceptibility. The elemental analyses and spectral data indicate that the hydrazone side of ligand acts as a O,N,O′ tridentate and the fourth position is occupied with monodentate anion such as SCN−, CN−, N3−.
Dielectric relaxation of butyl acrylate—alcohol mixtures using time domain reflectometry
Authors: Dharmalingam K. , Ramachandran K. , Sivagurunathan P. , Prabhakar Undre B. , Khirade P. , Mehrotra S. 
Published: June 2007

AbstractDielectric relaxation measurements of butyl acrylate—alcohol mixtures at different concentrations and temperatures within the frequency range of 10 MHz to 10 GHz have been carried out using time domain reflectometry. Parameters such as the static permittivity, dielectric relaxation time, the Kirkwood correlation factor, the excess inverse relaxation time, and thermodynamic functions were determined and discussed to yield information on the molecular structure and dynamics of the mixture. The value of the dielectric properties decreases with increasing butyl acrylate concentration in alcohol and systematically varies with the length of alcohol alkyl chain. Negative values of the excess inverse relaxation time found for all concentrations and at all temperatures studied may indicate that the effective dipoles rotate slowly.
Binding affinities and spectra of complexes formed by dehydrotetrapyrido[20]annulene and small molecules
Authors: Wang Z. , Wu S. 
Published: June 2007

AbstractTheoretical study on the binding affinities of dehydrotetrapyrido[20] annulene to the alkene and aromatic molecules was performed using the AM1 and DFT methods. It indicated that the host possesses the ability to bind the above molecules since the binding energies of the complexes were negative. The complexes were stabilized via the hydrogen bonding, static effect, and π — π stacking interaction between the host and guest molecules. Based on the B3LYP/3-21G optimized geometries, the electronic, IR, and NMR spectra were calculated using the INDO/CIS, AM1, and B3LYP/3-21G methods, respectively. Due to the hydrogen bonding, the first absorption maxima in the electronic spectra of studied complexes were blue-shifted, whereas the main IR frequencies for some of the complexes were red-shifted. At the same time, the chemical shifts of carbon atoms forming the bonds in the complexes were lower, compared to those of the host.
Comparison of spectrophotometric and HPLC methods for determination of lipid peroxidation products in rat brain tissues
Authors: Ďurfinová M. , Brechtlová M. , Líška B. , Barošková Ž. 
Published: June 2007

AbstractTwo methods for determination of lipid peroxidation (LPX) products in rat brain homogenates were compared. The thiobarbituric acid (TBA) test and HPLC assay for analysis of malondialdehyde (MDA) were applied. Rat brain homogenate dissolved in tris(hydroxymethyl)aminomethane hydrochloride (Tris-HCl) was mixed with TBA and H3PO4 and heated at 100°C to form colored complex that was extracted into butanol. No significant differences were found between the contents of TBA-reacting substances and their amount deduced from the MDA-TBA analysis. The presented results show that LPX products in brain homogenates can be determined without interferences also by the TBA test. Moreover, a survey of various methods used for the sample preparation before analysis of LPX products originating from different brain areas was made and compared with the obtained results.
Patient Characteristics and Telemedicine Use in the US, 2022
Authors: Chang Eva , Penfold Robert B. , Berkman Nancy D. 
Published: March 2024

ImportanceTelemedicine use was common during the COVID-19 pandemic, expanding many patients’ approaches to accessing health care. Of concern is whether telemedicine access was poorer among higher-needs and disadvantaged populations.ObjectiveTo assess patient characteristics associated with telemedicine use and telemedicine mode and describe telemedicine visit experiences by telemedicine mode.Design, Setting, and ParticipantsThis cross-sectional study included data from the 2022 Health Information National Trends Survey and included US adults with a health care visit. Data were analyzed from May to September 2023.ExposurePatient characteristics.Main Outcomes and MeasuresAny telemedicine visits vs in-person visits only; telemedicine mode (video vs audio-only). Multivariable logistic models assessed patient characteristics associated with telemedicine visits and mode. Bivariate analyses compared telemedicine experiences by mode.ResultsThe study included 5437 adult patients (mean [SE] age, 49.4 [0.23] years; 3136 females [53.4%]; 1928 males [46.6%]). In 2022, 2384 patients (43%) had a telemedicine visit; 1565 (70%) had a video visit while 819 (30%) had an audio-only visit. In multivariable models, older age (≥75 years: adjusted odds ratio [aOR], 0.63; 95% CI, 0.42-0.94), no internet use (aOR, 0.62; 95% CI, 0.48-0.81), and living in the Midwest (aOR, 0.50; 95% CI, 0.35-0.70) were negatively associated with having telemedicine visits. Female sex (aOR, 1.43; 95% CI, 1.12-1.83), having chronic conditions (aOR, 2.13; 95% CI, 1.66-2.73), and multiple health care visits (2-4 visits: aOR, 1.77; 95% CI, 1.23-2.54; ≥5 visits: aOR, 3.29; 95% CI, 2.20-4.92) were positively associated. Among individuals who used telemedicine, older age (65-74 years: aOR, 2.13; 95% CI, 1.09-4.14; ≥75 years: aOR, 3.58; 95% CI, 1.60-8.00), no health insurance (aOR, 2.84; 95% CI, 1.42-5.67), and no internet use (aOR, 2.11; 95% CI, 1.18-3.78) were positively associated with having audio-only visits. We observed no significant differences in telemedicine use or mode by education, race and ethnicity, or income. Patients’ experiences using telemedicine were generally similar for video and audio-only except more individuals who used audio-only had privacy concerns (20% vs 12%, P = .02).Conclusions and RelevanceIn this cross-sectional study of adults with health care visits, many patients, including those with the greatest care needs, chose telemedicine even after in-person visits were available. These findings support continuing this care delivery approach as an option valued by patients. Differences were not observed by most common measures of socioeconomic status. Continued monitoring of telemedicine use is needed to ensure equitable access to health care innovations.
Antibiotic Use in Late Preterm and Full-Term Newborns
Authors: Gyllensvärd Johan , Studahl Marie , Gustavsson Lars , Hentz Elisabet , Åkesson Karin , Li Huiqi , Norman Mikael , Elfvin Anders ,   SWENAB Study Group, Håkansson Stellan 
Published: March 2024

ImportanceAntibiotic treatment saves lives in newborns with early-onset sepsis (EOS), but unwarranted antibiotic use is associated with resistant bacteria and adverse outcomes later in life. Surveillance is needed to optimize treatment strategies.ObjectiveTo describe antibiotic use in association with the incidence and mortality from EOS among late-preterm and full-term newborns.Design, Setting, and ParticipantsThe Sweden Neonatal Antibiotic Use study was a nationwide observational study that included all late-preterm and full-term neonates born from January 1, 2012, to December 31, 2020, in neonatal units of all levels. All hospital live births from 34 weeks’ gestation during the study period were included in the study. Data were collected from the Swedish Neonatal Quality Register and the Swedish Medical Birth Register. Data were analyzed from August 2022 to May 2023.ExposureAdmission for neonatal intensive care during the first week of life.Main Outcomes and MeasuresThe main outcomes were the usage of intravenous antibiotics during the first week of life, the duration of antibiotic therapy, the rate of culture-proven EOS, and mortality associated with EOS.ResultsA total of 1 025 515 newborns were included in the study; 19 286 neonates (1.88%; 7686 girls [39.9%]; median [IQR] gestational age, 40 [38-41] weeks; median [IQR] birth weight, 3610 [3140-4030] g) received antibiotics during the first week of life, of whom 647 (3.4%) had EOS. The median (IQR) duration of antibiotic treatment in newborns without EOS was 5 (3-7) days, and there were 113 antibiotic-days per 1000 live births. During the study period there was no significant change in the exposure to neonatal antibiotics or antibiotic-days per 1000 live births. The incidence of EOS was 0.63 per 1000 live births, with a significant decrease from 0.74 in 2012 to 0.34 in 2020. Mortality associated with EOS was 1.39% (9 of 647 newborns) and did not change significantly over time. For each newborn with EOS, antibiotic treatment was initiated in 29 newborns and 173 antibiotic-days were dispensed.Conclusions and RelevanceThis large nationwide study found that a relatively low exposure to antibiotics is not associated with an increased risk of EOS or associated mortality. Still, future efforts to reduce unwarranted neonatal antibiotic use are needed.
Nested‐Cell Architecture and Molecular Surface Modification Enabled 10 Megapascals Range High Sensitivity Flexible Pressure Sensors for Application in Extreme Environment
Authors: Gu Mengxi , Zhao Binzhe , Gao Junxue , Zhou Xuan , Huang Licong , Wang Jiahong , Wei Lei , Yang Chunlei , Chen Ming 
Published: March 2024

AbstractFlexible pressure sensors with high sensitivity over a broad sensing range are of great value in daily life and highly desired in various extreme environment, from human motion inspection to heavy industrial robots to high energy radiation and extremely cold/high temperature environments. However, it remains a significant challenge for a single pressure sensor to simultaneously possess high sensitivity and broad detection range due to the trade‐off between these two properties. Here, a high‐performance pressure sensor is developed based on flexible modified silicon rubber/functionalized carbon nanotube (MSR/FCNT). The designed nested‐cell architecture and molecular surface modification strategy endow the pressure sensor with high sensitivity (>28 kPa−1) over 10 MPa sensing range, an ultralow detection limit (≈0.94 Pa), an ultrahigh pressure resolution (0.0075%) at a pressure of 3 MPa, and a low fatigue over 10 000 repetitive cycles even at an extremely high pressure of 5 MPa. Furthermore, the resulting sensor presents excellent durability after freezing at extreme cold temperature (−80 °C) as well as resistance to high temperature (200 °C) and high‐energy X‐ray radiation. The proposed nested‐cell architecture is a generic strategy for porous materials to achieve broad range high sensitivity.
A Spectrally Programmable Liquid‐State Active System for High‐Performance (SPLASH) Multicolor Lasing and White Emission
Authors: Szukalska Alina , Czajkowski Maciej , Cybinska Joanna , Myśliwiec Jarosław 
Published: March 2024

AbstractThe development of a Spectrally Programmable Liquid‐State Active System for High‐performance (SPLASH) is introduced, which allows for multicolor lasing and White Emission. This completely liquid, three‐phase device showcases exceptional tunability within a singular Liquid Crystal Cell (LCC). Components include a Coumarin 540 (CM540)‐doped liquid crystal (LC) mesophase, an ionic liquid (RTIL) richly endowed with Rhodamine 6G (R6G) dye, and a Stilbene 420 (SB420)‐infused water‐based solution. This device displays significant accomplishments in multicolor tunability through the use of both lasing and fluorescence mechanisms. As a result, White Light Fluorescence (WFluo) and White Light Hybrid‐Emission (WHE) are showed, which consist of two lasing bands and one fluorescence. This is achieved in a liquid‐state environment characterized by phase separation and careful device management. Additionally, due to its fluid‐like nature and compact design, the device inherently offers considerable scalability — since its components can be easily adjusted and rearranged. This approach promises ground‐breaking advancements in high‐impact applications such as the Li‐Fi concept. Therefore, SPLASH stands out as an innovative platform for White Light Fluorescence (WFluo) and Multicolor Lasing (ML) within liquid‐state active systems.
A Detachable Magnetic Nanodevice for the Efficient Capture and Subtype Identification of Circulating Tumor Cells
Authors: Zhang Qianying , Xu Shengshi , Sun Yao , Tan Tingting , Zheng Jingyi , Zhou Yuanzhen , Yu Sha , Zhang Jian‐Rong , Zhu Jun‐Jie 
Published: March 2024

AbstractThe effective capture and accurate identification of heterogeneous circulating tumor cells (CTCs) aid in guiding clinical diagnosis and personalized treatment of tumors. Herein, a core‐satellite‐sized magnetic separable nanodevice (denoted as MS‐RI) is developed for the capture and subtype identification of heterogeneous CTCs by identifying the protein targets of CTCs in vitro and imaging intracellular nucleic acid targets of CTCs in situ. Upon the separation of CTCs by MS‐RI using aptamers as capture elements, the programmatically dissociated satellite particles aim to internalize into the cells for simultaneous profiling of microRNA‐21 and microRNA‐141. By virtue of the validated magnetic separation of the core structure, the high affinity of the aptamer, and the high sensitivity of the recognition imaging (RI) module, MS‐RI allows the isolation and subtyping of CTCs in clinical samples from breast cancer patients. This strategy of combining extracellular recognition and intracellular imaging pioneers a new paradigm for the capture and precision subtyping of heterogeneous CTCs.
Engineering Metallic Alloy Electrode for Robust and Active Water Electrocatalysis with Large Current Density Exceeding 2000 mA cm−2
Authors: Nairan Adeela , Feng Zhuo , Zheng Ruiming , Khan Usman , Gao Junkuo 
Published: March 2024

AbstractThe amelioration of brilliantly effective electrocatalysts working at high current density for the oxygen evolution reaction (OER) is imperative for cost‐efficient electrochemical hydrogen production. Yet, the kinetically sluggish and unstable catalysts remain elusive to large‐scale hydrogen (H2) generation for industrial applications. Herein, a new strategy is demonstrated to significantly enhance the intrinsic activity of Ni1‐xFex nanochain arrays through a trace proportion of heteroatom phosphorus doping that permits robust water splitting at an extremely large current density of 1000 and 2000 mA cm−2 for 760 h. The in situ formation of Ni2P and Ni5P4 on Ni1‐xFex nanochain arrays surface and hierarchical geometry of the electrode significantly promote the reaction kinetics and OER activity. The OER electrode provides exceptionally low overpotentials of 222 and 327 mV at current densities of 10 and 2000 mA cm−2 in alkaline media, dramatically lower than benchmark IrO2 and is among the most active catalysts yet reported. Remarkably, the alkaline electrolyzer renders a low voltage of 1.75 V at a large current density of 1000 mA cm−2, indicating outperformed overall water splitting. The electrochemical fingerprints demonstrate vital progress toward large‐scale H2 production for industrial water electrolysis.
Self‐Powered Vibration Frequency Monitoring Device for the Grid Based on Triboelectric Nanogenerator and Micro Thermoelectric Generator
Authors: Hao Zhijie , Liu Changxin , Shao Tong , Ma Zhenyao , Lu Yingli , Wang Yi , Sui Zheng 
Published: March 2024

AbstractThe galloping of transmission lines (GTLs) has a significant impact on the development of smart grids. However, traditional vibration frequency monitoring devices for transmission lines suffer from issues such as low measurement accuracy, high environmental requirements, and the inability to achieve self‐powering. A self‐powered vibration frequency monitoring method is proposed based on frequency‐sensing triboelectric nanogenerator (F‐TENG) and micro thermoelectric generators (MTEG). Models for vibration frequency sensing based on F‐TENG and energy capture based on MTEG are established. A flexible self‐powered sensing prototype, integrating F‐TENG, MTEG, and a Signal processing and Energy harvesting Circuit (SEC), is fabricated. Additionally, an innovative solvothermal method for the preparation of MTEG materials is presented, resulting in Bi2Te3‐based thermoelectric materials with significantly high thermoelectric conversion performance. Experimental results demonstrate that within the range of 0.1–5.1 Hz, F‐TENG can precisely perceive the frequency of GTLs, with a maximum error of 1.274%. MTEG achieves a maximal open‐circuit voltage of 3.282 V. Finally, the SEC unit is designed to couple the outputs of F‐TENG and MTEG for frequency calculation and wireless transmission to a microcontroller. This device provides an efficient solution for monitoring the frequency of GTLs and offers robust support for the stability of the smart grid.
Recent Advances in Piezocatalysts for Dye Degradation
Authors: Zhou Lu , Meng Linghui , Jia Haowei , Lu Yile , Liang Tianyue , Yuan Yu , Liu Chao , Dong Zekun , Hu Long , Guan Peiyuan , Zhou Yingze , Li Mengyao , Wan Tao , Han Zhaojun , Chu Dewei 
Published: March 2024

AbstractPiezocatalysis is attracting extensive attention in recent years because it can directly convert mechanical energy from the ambient environment (such as tiny vibrations and noise) into piezopotential for catalytic activities. Dyes are widely used in diverse industries, including paper, printing, and textiles, which cause serious environmental problems due to their persistence and toxicity. Unlike traditional catalysts that rely on chemical reactions to drive dye degradation, piezocatalysts offer a sustainable and cost‐effective alternative to breaking down complex molecules through creating highly reactive species, which have shown a significant promise in the treatment of organic pollutants in wastewater. In this review, the basic principles of piezocatalysis are first outlined, specifically describing two ubiquitous forms of driving force in nature. Following the catalytic mechanism, the current mainstream piezocatalytic materials are classified into two categories: organic and inorganic materials with detailed discussions. Moreover, after investigating and analyzing previous literature, effective strategies for improving piezocatalytic efficiency for dye degradation are systematically compared and summarized. In the end, current issues that need to be addressed in the future as well as potential research directions related to piezocatalysis are prospected. This work provides an insight into solving current issues to advance the piezocatalysts.
Optimizing Metal‐Surface Water Disinfection: CFD Study on Microorganism Collision Against a Triply Periodic Minimal Surface
Authors: Melo Leonardo G. T. C. , de Menezes Frederico Duarte , da Costa José Angelo Peixoto , Alves João Vitor Pereira , Chiang Yi Wai , Santos Rafael M. 
Published: March 2024

AbstractThis research presents a point‐of‐use (POU) water treatment technology utilizing metal/metallic surfaces based on Triply Periodic Minimal Surface (TPMS) structured filtration infills. Computational Fluid Dynamics modeling using Ansys CFX software is employed to analyze the behavior of Escherichia coli bacteria within a continuous liquid phase moving through the filtration infill, assess particle collision dynamics, and evaluate the efficiency of filtration, considering pressure drop as a fundamental factor in process energy consumption. TPMS infill meshes are coded in a Schwarz P shape using Python, and the Darcy‐Forchheimer equation is employed to determine the permeability and resistance loss coefficient of the infill geometry. The results indicate that the TPMS infill efficiently captures particles while introducing a negligible pressure drop into the system. It is found that a single 40 mm infill configuration is the most efficient, exhibiting a higher collision rate compared to the smaller 20 mm infill configuration and a lower pressure drop compared to the two 20 mm infill configurations in the series. Additionally, this study provides insights into the behavior of continuous fluid flow through TPMS infill in view of scaled‐up implementation, including the presence of recirculation zones that can be exploited to further enhance the collision rate of particles.
A Retina‐Inspired Optoelectronic Synapse Using Quantum Dots for Neuromorphic Photostimulation of Neurons
Authors: Balamur Ridvan , Eren Guncem Ozgun , Kaleli Humeyra Nur , Karatum Onuralp , Kaya Lokman , Hasanreisoglu Murat , Nizamoglu Sedat 
Published: March 2024

AbstractNeuromorphic electronics, inspired by the functions of neurons, have the potential to enable biomimetic communication with cells. Such systems require operation in aqueous environments, generation of sufficient levels of ionic currents for neurostimulation, and plasticity. However, their implementation requires a combination of separate devices, such as sensors, organic synaptic transistors, and stimulation electrodes. Here, a compact neuromorphic synapse that combines photodetection, memory, and neurostimulation functionalities all‐in‐one is presented. The artificial photoreception is facilitated by a photovoltaic device based on cell‐interfacing InP/ZnS quantum dots, which induces photo‐faradaic charge‐transfer mediated plasticity. The device sends excitatory post‐synaptic currents exhibiting paired‐pulse facilitation and post‐tetanic potentiation to the hippocampal neurons via the biohybrid synapse. The electrophysiological recordings indicate modulation of the probability of action potential firing due to biomimetic temporal summation of excitatory post‐synaptic currents. These results pave the way for the development of novel bioinspired neuroprosthetics and soft robotics, and highlight the potential of quantum dots for achieving versatile neuromorphic functionality in aqueous environments.