1,664 results on '"Yun W"'
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2. The housing consumption capital asset pricing model with an antichresis rent market: Nonseparability and composition risk.
- Author
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Kim, Jihun, Hur, Seok‐Kyun, and Park, Yun W.
- Subjects
CAPITAL assets pricing model ,RISK premiums ,HOUSING ,RENT - Abstract
We develop a housing consumption capital asset pricing model for economies with an antichresis rent market wherein property owners receive up‐front lump‐sum deposits from renters instead of monthly rents and use it as leverage to acquire housing assets for rent. We estimate the model using antichresis rent market and stock market data for Korea. We find that housing consumption and nonhousing consumption, which are complementary over the long term, have sufficient cross‐sectional elasticity of substitution, leading to a meaningful composition risk premium. We find that the housing expenditure share is procyclical, while intratemporal elasticity of substitution between housing and nonhousing consumption is close to but larger than one and greater than intertemporal elasticity of substitution. As a result, the composition risk arising from the nonseparability of housing and nonhousing consumption induces a sizable positive risk premium. Finally, we examine the effect of interest rate risk by decomposing composition risk into interest rate risk and noninterest rate risk and find that interest rate risk is primarily responsible for the positive composition risk premium. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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3. A PROSPECTIVE REGISTRY STUDY OF PEG‐G‐CSF PROPHYLAXIS FOR PATIENTS WITH DIFFUSE LARGE B‐CELL LYMPHOMA (CISL 1403).
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Jeong, S., Kim, S., Hong, J., Park, Y., Kang, H., Koh, Y., Lee, G., Lee, W., Yang, D., Do, Y., Kim, M., Yoo, K., Yun, W., Yi, J., Jo, J., Eom, H., Kwak, J., Shin, H., Park, B., and Lee, J.
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DIFFUSE large B-cell lymphomas ,LONGITUDINAL method ,LYMPHOMAS - Published
- 2019
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4. Parameter Stability and the Valuation of Mortgages and Mortgage-Backed Securities.
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LaCour-Little, Michael, Park, Yun W., and Green, Richard K.
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MORTGAGE-backed securities ,MORTGAGES ,FINANCIAL crises ,RISK management in business ,ECONOMIC research ,TECHNOLOGICAL innovations - Abstract
The recent financial crisis was triggered by large and unexpected losses on mortgages and mortgage-related securities. Here we examine model risk arising from innovations in mortgage markets and the effect on asset values. In particular, we examine the effect of parameter instability in the prepayment function. Using carefully constructed microdata, we find that the refinancing propensity was greater in 1998 for a 1997 issue given the same incentives, compared to the 1993 performance of a 1992 issue. The associated change in cash flow patterns produces economically significant changes in asset prices. Results are robust to alternative term structure models. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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5. EXECUTIVE PAY AND THE DISCLOSURE ENVIRONMENT: CANADIAN EVIDENCE.
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Park, Yun W., Nelson, Toni, and Huson, Mark R.
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EXECUTIVE compensation ,PROXY statements ,ECONOMIC impact ,LABOR market - Abstract
We examine the economic consequences of the Ontario Securities Commission's requirement that finns disclose details of executive pay in proxy statements. Before 1993, Canadian firms only reported executive compensation in the aggregate. We predict the increased availability of compensation information will force boards of directors to compete in the managerial labor market by offering higher pay. We also predict public pressure on boards of directors to justify the level of executive pay will result in increased weight on incentive pay. The data support these hypotheses. We also document that pay- performance sensitivity has increased. [ABSTRACT FROM AUTHOR]
- Published
- 2001
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6. Controlling Shareholder and Executive Incentive Structure: Canadian Evidence.
- Author
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Park, Yun W., Nelson, Toni, and Torabzadeh, Khalil M.
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- 2000
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7. X-ray Imaging and Microspectroscopy of Plants and Fungi.
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Yun, W., Pratt, S. T., Miller, R. M., Cai, Z., Hunter, D. B., Jarstfer, A. G., Kemner, K. M., Lai, B., Lee, H.-R., Legnini, D. G., Rodrigues, W., and Smith, C. I.
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- 1998
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8. A COMPARATIVE STUDY OF THE EFFECTS OF LECTURE AND COMPUTER-AIDED INSTRUCTION ON STUDENT...
- Author
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Tsai, San-Yun W. and Pohl, Norval F.
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LECTURE method in teaching ,COMPUTER assisted instruction ,LEARNING ,COMPUTER programming ,ACADEMIC achievement ,STUDENT attitudes ,TEACHING - Abstract
This paper describes a study of the differences in student learning achievement (as measured by four different types of common performance evaluation techniques) in a computer programming course under three teaching/learning environments: lecture, computer-aided instruction, and lecture supplemented with computer-aided instruction. Detailed descriptions are included of the measurement instruments used to evaluate student learning achievement. The analysis of variance, randomized blocks design, detected significant differences among treatment groups (teaching/learning environments) when student learning achievement was measured by two of the evaluation techniques. Implications of the results of this and related studies are detailed and include a consideration of student attitude toward CAI and the cost structure of CAI relative to that of the traditional lecture/discussion format. [ABSTRACT FROM AUTHOR]
- Published
- 1978
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9. Melatonin prevents gentamicin-induced testicular toxicity and oxidative stress in rats.
- Author
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Kim, S.‐H., Lee, I.‐C., Baek, H.‐S., Shin, I.‐S., Moon, C., Yun, W.‐K., Nam, K.‐H., Kim, H.‐C., and Kim, J.‐C.
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PHYSIOLOGICAL effects of melatonin ,GENTAMICIN ,MAMMAL physiology ,OXIDATIVE stress ,TESTIS ,TOXICOLOGICAL chemistry ,LABORATORY rats ,SPERMATOGENESIS in animals ,MALONDIALDEHYDE ,THERAPEUTICS - Abstract
This study investigated the protective effects of melatonin ( MT) against gentamicin ( GM)-induced testicular toxicity and oxidative damage in rats. GM (100 mg kg
−1 ) was injected intraperitoneally (i.p.) to rats for 6 days. MT (15 mg kg−1 ) was administered i.p. to rats for 6 days at 1 hr after the GM treatment. GM caused a decrease in prostate and seminal vesicle weights, sperm count and sperm motility. Histopathological examination showed various morphological alterations in the testis, characterised by degeneration of spermatogonia/spermatocytes, decrease in the number of early spermatogenic cells and vacuolisation. In addition, an increased malondialdehyde concentration and decreased glutathione content and glutathione reductase, catalase and glutathione-S-transferase activities were found in the testis. In contrast, MT treatment significantly attenuated the testicular toxicity of GM, including decreased reproductive organ weights, sperm count, and sperm motility and increased histopathological alterations. MT also had an antioxidant benefit by decreasing the lipid peroxidative product malondialdehyde and increasing the level of the antioxidant glutathione and the activities of antioxidant enzymes in the testis. These results indicate that MT prevents testicular toxicity induced by GM in rats, presumably due to its potent antioxidant activity, and its ability to inhibit lipid peroxidation, and restore antioxidant enzyme activity. [ABSTRACT FROM AUTHOR]- Published
- 2014
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10. Advantages of a synchrotron bending magnet as the sample illuminator for a wide-field X-ray microscope.
- Author
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Feser, M., Howells, M. R., Kirz, J., Rudati, J., and Yun, W.
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SYNCHROTRON radiation ,X-ray microscopy ,TOMOGRAPHY ,LIGHT sources ,MAGNETS - Abstract
In this paper the choice between bending magnets and insertion devices as sample illuminators for a hard X-ray full-field microscope is investigated. An optimized bending-magnet beamline design is presented. Its imaging speed is very competitive with the performance of similar microscopes installed currently at insertion-device beamlines. The fact that imaging X-ray microscopes can accept a large phase space makes them very well suited to the output characteristics of bending magnets which are often a plentiful and paid-for resource. There exist opportunities at all synchrotron light sources to take advantage of this finding to build bending-magnet beamlines that are dedicated to transmission X-ray microscope facilities. It is expected that demand for such facilities will increase as three-dimensional tomography becomes routine and advanced techniques such as mosaic tomography and XANES tomography (taking three-dimensional tomograms at different energies to highlight elemental and chemical differences) become more widespread. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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11. Optimal lot sizing in an unreliable two-stage serial production–inventory system.
- Author
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Giri, B. C., Yun, W. Y., and Dohi, T.
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INVENTORIES ,INVENTORY control ,PRODUCTION control ,MATERIALS management ,MACHINERY ,BREAKDOWNS (Machinery) - Abstract
This paper deals with a two-stage lot sizing problem in an unreliable production environment in which the machine at the first stage (stage 1) is failure-prone while the machine at the final stage (stage 2) is failure-free. The process goods are obtained in batches by manufacturing and are transferred continuously from stage 1 to stage 2 where the finished goods are produced and then shipped out to customers. If the machine at stage 1 breaks down then the production of the interrupted lot is not resumed. Instead, a new production cycle is initiated after machine repair. The model is formulated assuming that the production rate of the machine at stage 1 is greater than that at stage 2 and the time to machine failure and repair time are arbitrarily distributed. Specific formulation of the model under exponential failure and exponential repair time distributions is derived and a procedure for finding the optimal production policy is presented. The dependence of the optimal production policy on the model parameters is also examined with numerical examples. [ABSTRACT FROM AUTHOR]
- Published
- 2005
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12. Microfluidics and Spectral Induced Polarization for Direct Observation and Petrophysical Modeling of Calcite Dissolution.
- Author
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Rembert, F., Leroy, P., Lassin, A., and Roman, S.
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INDUCED polarization ,CHEMICAL kinetics ,MICROSCOPY ,IMAGE processing ,MICROFLUIDICS - Abstract
We investigate how micro‐geoelectrical monitoring is promising for studying microscale coupled processes since it facilitates the upscaling of pore‐scale observations and enhances the petrophysical interpretation of the geoelectrical measurements. Microscale geophysics using microfluidics emerges and combines direct visualization of pore scale dynamics and chemical reactivity with geoelectrical monitoring. Calcite dissolution is a usual geochemical reaction considered as an analog of water–mineral interactions involved in the critical zone. We develop a numerical workflow combining image processing and geochemical simulation as inputs for the petrophysical modeling applied to a published data set of microscale induced polarization monitoring of calcite dissolution under partially saturated conditions. The successful interpretation provides the cation exchange capacity and specific surface area evolution; essential parameters in field‐scale surveys. Plain Language Summary: Surface and borehole geoelectrical prospecting is used to understand the structure of the subsurface and the functioning of the processes that take place there. These processes include flows and changes in groundwater stocks, transport of pollutants, and dissolution and precipitation of minerals. The complexity of studying these processes lies in the large‐scale impact that arises from mechanisms and interactions occurring at the microscopic scale. In addition, the complexity of the heterogeneous natural environment makes it difficult to interpret the measurements obtained on‐site. Pore‐scale experimental studies reveal a refined understanding of these processes. In particular, microfluidics for geosciences uses optical microscopy to visualize flow, transport, and reactive processes. This approach demonstrates the natural heterogeneity of processes in porous media, even at the pore scale, and how the electrical signal measured on the investigated volume accounts for the average behavior of these processes. Studies at the micrometric scale are questioned for their representativeness compared to related field‐scale applications. In this study, we validate the link between scales through a conceptual model widely used for field‐scale prospecting and show that the geoelectrical response remains sensitive to the same couplings. Key Points: Microfluidics enables direct visualization of pore scale reactive transport and determining petrophysical parameters from image processingCombining microfluidics with geoelectrical monitoring enables upscaling of pore scale observationsPetrophysical modeling applies to pore scale geoelectrical monitoring [ABSTRACT FROM AUTHOR]
- Published
- 2024
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13. Impact of Side Chains in 1‐n‐Alkylimidazolium Ionomers on Cu‐Catalyzed Electrochemical CO2 Reduction.
- Author
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Song, Young In, Yoon, Bohak, Lee, Chanwoo, Kim, Dogyeong, Han, Man Ho, Han, Hyungu, Lee, Woong Hee, Won, Da Hye, Kim, Jung Kyu, Jeon, Hyo Sang, and Koh, Jai Hyun
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HYDROGEN evolution reactions ,CHEMICAL synthesis ,SUSTAINABLE design ,DENSITY functional theory ,COPPER ,ELECTROLYTIC reduction ,IONOMERS - Abstract
This study presents the impact of the side chains in 1‐n‐alkylimidazolium ionomers with varying side chain lengths (CnH2n+1 where n = 1, 4, 10, 16) on Cu‐catalyzed electrochemical CO2 reduction reaction (CO2RR). Longer side chains suppress the H2 and CH4 formation, with the n‐hexadecyl ionomer (n = 16) showing the greatest reduction in kinetics by up to 56.5% and 60.0%, respectively. On the other hand, C2H4 production demonstrates optimal Faradaic efficiency with the n‐decyl ionomer (n = 10), a substantial increase of 59.9% compared to its methyl analog (n = 1). Through a combination of density functional theory calculations and material characterization, it is revealed that the engineering of the side chains effectively modulates the thermodynamic stability of key intermediates, thus influencing the selectivity of both CO2RR and hydrogen evolution reaction. Moreover, ionomer engineering enables industrially relevant partial current density of –209.5 mA cm−2 and a Faradaic efficiency of 52.4% for C2H4 production at 3.95 V, even with a moderately active Cu catalyst, outperforming previous benchmarks and allowing for further improvement through catalyst engineering. This study underscores the critical role of ionomers in CO2RR, providing insights into their optimal design for sustainable chemical synthesis. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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14. Design of bandwidth enhancement circular polarisation microstrip antenna loaded with sunflower‐shaped metasurface.
- Author
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Shen, Xiumei, Zhang, Chuanyun, Yin, Yingzeng, and Zhong, Xiangjiang
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BROADBAND antennas ,SLOT antennas ,ANTENNAS (Electronics) ,BANDWIDTHS ,MICROSTRIP antennas ,RADIATION ,METAMATERIAL antennas - Abstract
A circular polarised (CP) microstrip antenna loaded with sunflower‐shaped metasurface (SSM) to enhance the bandwidth using characteristic mode analysis is proposed in this communication. The SSM, divided into inner and outer parts by a ring, consists of equally spaced sectors of equal angles. In this design, the coupled corner‐truncated microstrip antenna with a slot in the centre is employed to obtain CP radiation by exciting two orthogonal modes, which have a 90° phase difference. Meanwhile, it demonstrates that the SSM structure significantly expands the operational bandwidth and exhibits a stable radiation pattern at high frequencies. Simulation and measurement results confirm that this SSM antenna achieves a wide operating bandwidth of 64.3% (4.5–8.76 GHz) and a 3‐dB axial ratio bandwidth of 30.6% (4.7–6.4 GHz), while maintaining a compact profile of 0.68 × 0.68 × 0 0.08 λ03. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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15. Using zone plates for X-ray microimaging and microspectroscopy in environmental science.
- Author
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Kemner, K. M., Yun, W., Cai, Z., Lai, B., Lee, H.-R., Maser, J., Legnini, D. G., Rodrigues, W., Jastrow, J. D., Miller, R. M., Pratt, S. T., Schneegurt, M. A., and Kulpa, C. F.
- Published
- 1999
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16. Value of EMG analysis of mandibular elevators in open-close-clench cycle to diagnosing TMJ disturbance syndrome.
- Author
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Chong-Shan, S. and Hui-Yun, W.
- Subjects
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TEMPOROMANDIBULAR disorders , *DENTAL research , *SPASMS , *MUSCLE contraction , *MASSETER muscle , *DENTAL pathology - Abstract
The EMGs of the temporal and masseter muscle, in sixty patients with temporomandibular joint disturbance syndrome (TMJDS) and thirty normal controls, were recorded during rhythmical open-close-clench cycle movement and before and after occlusal splint therapy. The duration of the muscle contraction before initial tooth contact (DMC), the latent period (LP) and the silent period (SP) of the myoelectrical activity were used as indices for exploring their diagnostic value. In contrast with the controls, DMC, LP and SP lengthened in the patients. The DMC was prolonged in those patients where there were TMJ sounds, the inter-cuspated position did not coincide with the muscular contact position and there was deviated mandibular movement. An increase of the SP was related to tooth contact on the balancing side. After treatment, the DMC and SP in the patients returned to the level of the controls. It was found that the internal correction rate of Fisher's linear discriminate function established for the DMC and SP of the temporal and masseter muscles was 80.9% and 85.1% respectively. The results show that the DMC and SP, of the temporal and masseter muscles have some value in diagnosing muscular dysfunction and discriminating therapeutic effectiveness. [ABSTRACT FROM AUTHOR]
- Published
- 1989
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17. Measurements of Emittance and Absolute Spectral Flux of the PETRA Undulator at DESY Hamburg.
- Author
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Hahn, U., Schulte-Schrepping, H., Balewski, K., Schneider, J. R., Ilinski, P., Lai, B., Yun, W., Legnini, D., and Gluskin, E.
- Published
- 1997
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18. Central Role of Hypothalamic Circuits for Acupuncture's Anti‐Parkinsonian Effects.
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Oh, Ju‐Young, Lee, Hyowon, Jang, Sun‐Young, Kim, Hyunjin, Park, Geunhong, Serikov, Almas, Jang, Jae‐Hwan, Kim, Junyeop, Yang, Seulkee, Sa, Moonsun, Lee, Sung Eun, Han, Young‐Eun, Hwang, Tae‐Yeon, Jung, Sharon Jiyoon, Kim, Hee Young, Lee, Seung Eun, Oh, Soo‐Jin, Kim, Jeongjin, Kim, Jeongyeon, and Kim, Jongpil
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CENTRAL nervous system diseases ,NEURAL pathways ,HYPOTHALAMIC hormones ,PARKINSON'S disease ,NEURAL circuitry ,HYPOTHALAMUS - Abstract
Despite clinical data stretching over millennia, the neurobiological basis of the effectiveness of acupuncture in treating diseases of the central nervous system has remained elusive. Here, using an established model of acupuncture treatment in Parkinson's disease (PD) model mice, we show that peripheral acupuncture stimulation activates hypothalamic melanin‐concentrating hormone (MCH) neurons via nerve conduction. We further identify two separate neural pathways originating from anatomically and electrophysiologically distinct MCH neuronal subpopulations, projecting to the substantia nigra and hippocampus, respectively. Through chemogenetic manipulation specifically targeting these MCH projections, their respective roles in mediating the acupuncture‐induced motor recovery and memory improvements following PD onset are demonstrated, as well as the underlying mechanisms mediating recovery from dopaminergic neurodegeneration, reactive gliosis, and impaired hippocampal synaptic plasticity. Collectively, these MCH neurons constitute not only a circuit‐based explanation for the therapeutic effectiveness of traditional acupuncture, but also a potential cellular target for treating both motor and non‐motor PD symptoms. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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19. Semantic IoT Service Communication—Impedance Matching Between Service Goal and Event Routing.
- Author
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Zhang, Yang, Cheng, Bo, Chen, Junliang, and Pandey, Kavita
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IMPEDANCE matching ,INTERNET of things ,CONTROL rooms ,ALGORITHMS ,SEMANTICS - Abstract
In IoT (Internet of Things) applications, there are many kinds of event flows. Without converging these flows based on their semantics, it is difficult to establish ultrascale‐connected IoT service systems. Event flow convergence may encompass event content aggregation, aggregated routing, and aggregated subscription matching. In our work, a semantic IoT service communication fabric is proposed to achieve this convergence, specifically for impedance matching between service computation and event communication, leveraging semantic knowledge technologies. Compared with classic semantic communication by abstracting the underlying network as a channel, our solution delves into the channel for impedance matching, that is, focusing on semantic event routing in the channel and semantic event content aggregation along routing paths. Multiple tenants are supported in the IoT service communication fabric, where each tenant can use virtual semantic interfaces to organize together its devices, IoT gateways, control centers, and data centers, and semantic event communication schemes and algorithms are proposed to map IoT services' goals into event routing. We finally conduct evaluations to show the effectiveness and applicability of our solution. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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20. Omega‐3 supplementation attenuates doxorubicin‐induced cardiotoxicity but is not related to the ceramide pathway.
- Author
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Monte, Marina Gaiato, Tonon, Carolina Rodrigues, Fujimori, Anderson Seiji, Ribeiro, Ana Paula Dantas, Zanati, Silmeia Garcia, Okoshi, Katashi, Camacho, Camila Renata Correa, Moretto, Maria Regina, de Paiva, Sergio Alberto Rupp, Zornoff, Leonardo Antonio Mamede, Azevedo, Paula Schmidt, Minicucci, Marcos Ferreira, and Polegato, Bertha Furlan
- Subjects
LEFT heart atrium ,FATTY acids ,HEART diseases ,BLOOD cholesterol ,CARDIOTOXICITY ,DOXORUBICIN - Abstract
Cardiotoxicity is the serious side effect of doxorubicin treatment. Ceramides are formed from the degradation of sphingolipids in cell membranes and play an important role in signaling and modulating biological processes. There is evidence that omega‐3 fatty acid administration can act on this pathway. To evaluate the role of the ceramide pathway in the pathophysiology of doxorubicin‐induced cardiotoxicity and the effect of omega‐3 fatty acid supplementation in the attenuation of chronic doxorubicin‐induced cardiotoxicity in rats. Sixty male Wistar rats were divided into four groups: Control (C), Doxorubicin (D), Omega‐3 fatty acids (W), and Doxorubicin + Omega‐3 fatty acids (DW). The groups received omega‐3 fatty acids (400 mg/kg/day, via gavage) or water for 6 weeks and doxorubicin (3.5 mg/kg, intraperitoneal) or saline once a week for 4 weeks. Doxorubicin‐treated animals showed increases in left atrium and left ventricle diameters, serum triglycerides and cholesterol, malondialdehyde, and protein carbonylation. We also observed a decrease in left ventricular shortening fraction and nSMase1 expression in the heart. Omega‐3 fatty acid supplementation attenuated the structural and functional alterations caused by doxorubicin and decreased protein carbonylation. In contrast to doxorubicin, omega‐3 fatty acids increased neutral nSMase activity in animals that both received and did not receive doxorubicin but with no effect on nSMase1 protein expression. Omega‐3 fatty acid supplementation attenuated the cardiotoxicity caused by doxorubicin. The ceramide pathway may be involved in the pathophysiology of cardiotoxicity, but it is not the mechanism by which omega‐3 fatty acids attenuated cardiac dysfunction. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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21. Syneresis‐Driven Self‐Refilling Printing of Geometry/Component‐Controlled Nano/Microstructures.
- Author
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Shiba, Kota, Saito, Kayoko, Minami, Kosuke, Arai, Shunto, Yoshikawa, Genki, Sun, Luyi, and Tenjimbayashi, Mizuki
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SYNERESIS ,COLUMNS ,MICROFABRICATION ,POLYDIMETHYLSILOXANE ,LIQUIDS - Abstract
Nano/microfabrication is of fundamental importance both in scientific and industrial situations. There are, therefore, many attempts at realizing easier, quicker, and more precise fabrication of various structures; however, achieving this aim without a bulky and costly setup is still challenging. Here, we introduce a facile and versatile means of printing an ordered structure consisting of nanoscale stripes and more complicated geometries including pillars and wavy form with a lateral resolution of single micrometers. To this end, we prepare a polydimethylsiloxane (PDMS) slab with an oxygen plasma‐induced wrinkled surface where liquid PDMS exudes by syneresis. Since this liquid PDMS is automatically loaded, the printing is repeatable without inking. A substrate moderately wettable to the liquid PDMS as well as amount/property‐controlled syneresis is primarily important for the creation of well‐defined structures. Precisely controlling these conditions will make this method universally applicable to diverse substrates and liquids including suspensions. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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22. Loss of Smek1 Induces Tauopathy and Triggers Neurodegeneration by Regulating Microtubule Stability.
- Author
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Duan, Ruo‐Nan, Liu, Ai, Sun, Yue‐Qing, Xie, Yun‐Fang, Wei, Shi‐Jun, Gao, Shang, Liu, Yi‐Ming, Li, Xi, Sun, Wen‐Jie, Li, Jiang‐Xia, Yan, Chuan‐Zhu, and Liu, Qi‐Ji
- Subjects
GLYCOGEN synthase kinase ,TAUOPATHIES ,ALZHEIMER'S disease ,PHOSPHOPROTEIN phosphatases ,MITOCHONDRIAL pathology - Abstract
Suppressor of Mek1 (Smek1) is a regulatory subunit of protein phosphatase 4. Genome‐wide association studies have shown the protective effect of SMEK1 in Alzheimer's disease (AD). However, the physiological and pathological roles of Smek1 in AD and other tauopathies are largely unclear. Here, the role of Smek1 in preventing neurodegeneration is investigated in tauopathy. Smek1 is downregulated in the aged human brain. Through single‐cell sequencing, a novel neuronal cluster is identified that possesses neurodegenerative characteristics in Smek1−/− mice. Smek1 deficiency caused markedly more severe motor and cognitive impairments in mice, as well as neuronal loss, gliosis, and tau hyperphosphorylation at major glycogen synthase kinase 3β (Gsk3β) sites. Protein‐protein interaction analysis revealed that the Ran‐binding domain (RanBD) in the N‐terminus of Smek1 facilitated binding with kinesin family member 2A (Kif2a). Depletion of Smek1 resulted in cytoplasmic aggregation of Kif2a, axon outgrowth defects, and impaired mitochondrial axonal trafficking. Downregulation of Kif2a markedly attenuated tau hyperphosphorylation and axon outgrowth defects in shSmek1 cells. For the first time, this study demonstrates that Smek1 deficiency progressively induces neurodegeneration by exacerbating tau pathology and mitochondrial dysfunction in an age‐dependent manner. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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23. Composite PEDOT:PSS‐PEO Layers for Improving Lithium Batteries**.
- Author
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Ritter, Timothy G., Il Kim, Yong, Bezerra De Souza, Breno, Wang, Xinnian, Pan, Yayue, Yurkiv, Vitaliy, Yarin, Alexander L., and Shahbazian‐Yassar, Reza
- Subjects
POLYETHYLENE oxide ,YOUNG'S modulus ,IONIC conductivity ,THERMAL stability ,THERMAL properties - Abstract
This work investigates the application of poly(3,4‐ethylenedioxythiophene) polystyrenesulfonate (PEDOT:PSS) with polyethylene oxide (PEO) in lithium batteries (LIBs). This composite film comprising PEDOT:PSS and PEO was 3D printed onto a carbon nanofiber (CNF) substrate to serve as a layer between the polypropylene (PP) separator and the lithium anode in LIBs. The resulting CNF‐PEDOT:PSS‐PEO film exhibited superior mechanical and thermal properties compared to conventional PP separators. Mechanical tests revealed a high Young's modulus and puncture strength for the composite film. Thermal stability tests indicated that the CNF‐PEDOT:PSS‐PEO film remained stable at higher temperatures compared to the commercial PP separator, and combustion tests confirmed its superior fire‐resistance properties. In terms of conductivity, the composite film maintained comparable ionic conductivity to the commercial PP separator. Electrochemical tests demonstrated that LIBs incorporating the CNF‐PEDOT:PSS‐PEO film exhibited slight improvement in cycling performance, with a 7.9 % increase in long‐term cycling capacity compared to LIBs using only the commercial PP separator. These findings indicate that the developed CNF‐PEDOT:PSS‐PEO composite film holds promise to improve safety, while maintaining the electrochemical performance of LIBs by reducing dendrite formation and enhancing thermal stability. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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24. Recent Advances in Transparent Electrodes and Their Multimodal Sensing Applications.
- Author
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Althumayri, Majed, Das, Ritu, Banavath, Ramu, Beker, Levent, Achim, Alin M., and Ceylan Koydemir, Hatice
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CONDUCTING polymers ,ELECTRIC conductivity ,SOLAR technology ,SOLAR cells ,BIOELECTRONICS - Abstract
This review examines the recent advancements in transparent electrodes and their crucial role in multimodal sensing technologies. Transparent electrodes, notable for their optical transparency and electrical conductivity, are revolutionizing sensors by enabling the simultaneous detection of diverse physical, chemical, and biological signals. Materials like graphene, carbon nanotubes, and conductive polymers, which offer a balance between optical transparency, electrical conductivity, and mechanical flexibility, are at the forefront of this development. These electrodes are integral in various applications, from healthcare to solar cell technologies, enhancing sensor performance in complex environments. The paper addresses challenges in applying these electrodes, such as the need for mechanical flexibility, high optoelectronic performance, and biocompatibility. It explores new materials and innovative techniques to overcome these hurdles, aiming to broaden the capabilities of multimodal sensing devices. The review provides a comparative analysis of different transparent electrode materials, discussing their applications and the ongoing development of novel electrode systems for multimodal sensing. This exploration offers insights into future advancements in transparent electrodes, highlighting their transformative potential in bioelectronics and multimodal sensing technologies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
25. Spatial Simulation and Optimization of Cropping Structure Under Climate and Land Use Change Conditions Considering Synergistic Economic Benefits and Carbon Reduction in Crop Growth Processes.
- Author
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Li, Mo, Li, Haiyan, Zhou, Zhaoqiang, Chen, Yingshan, Wang, Yijia, Li, Tianxiao, and Fu, Qiang
- Subjects
CLIMATE change ,GREENHOUSE gas mitigation ,AGRICULTURAL development ,GREENHOUSE gases ,CLIMATE change models ,CROP allocation - Abstract
The climate and land use changes caused by the natural environment and socioeconomic development have potential impacts on the green and sustainable development of agriculture. To accommodate agricultural production under multiple scenarios of future climate and land‐use change, this study proposes a "simulation–optimization" modeling approach based on a crop growth model with a synergistic "carbon emission–economic benefit" approach. This approach is based on climate change conditions and it accurately simulates future land use changes and crop growth processes, establishes a carbon emission intensity optimization model, and generates a spatial planting structure optimization and regulation scheme based on intelligent optimization algorithms under changing scenarios. The results of the model application show that the planting structure option in the future scenario can increase economic benefit by up to 14.8% compared to the current scenario while simultaneously reducing total greenhouse gas emissions by 6.77%. Correlation analysis of planting area, irrigation water volume, carbon intensity value and unilateral water use efficiency can be used to obtain the coordination level of each county under different regulation scenarios. This "simulation–optimization" modeling approach provides an effective approach to achieve synergistic and coordinated development of regional agricultural benefits and carbon reduction by fine‐tuning the planting structure, which promotes low‐carbon and high‐quality development of regional agriculture. Plain Language Summary: Understanding changes in agricultural cropping patterns under future climate change scenarios is critical for reducing carbon emissions and increasing yields in agriculture. We developed a joint approach using land use change and crop growth simulation models to investigate how cropland patterns will change under climate change scenarios and how crop yields will change when the amount of irrigation water varies. With the simulated cropland patterns and crop yields as input conditions, the optimization model is used to coordinate the acreage that should be allocated to each type of crop to achieve the highest economic efficiency and the lowest carbon emissions. This study illustrates the imperative need for farmland management to ensure that we can cope with future climate change. This approach can also be applied to other regions where agriculture is predominant. Key Points: Spatial simulation of climate and land use change scenariosCropping structure optimization coupled with spatial crop growth process simulationSynergistic optimization of economic efficiency and greenhouse gas emissions for low‐carbon and high‐efficiency development in agriculture [ABSTRACT FROM AUTHOR]
- Published
- 2024
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26. Anoikis in cell fate, physiopathology, and therapeutic interventions.
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Mei, Jie, Jiang, Xue‐Yao, Tian, Hui‐Xiang, Rong, Ding‐Chao, Song, Jia‐Nan, Wang, Luozixian, Chen, Yuan‐Shen, Wong, Raymond C. B., Guo, Cheng‐Xian, Wang, Lian‐Sheng, Wang, Lei‐Yun, Wang, Peng‐Yuan, and Yin, Ji‐Ye
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CELLULAR evolution ,CELLULAR control mechanisms ,ANOIKIS ,EXTRACELLULAR matrix ,EMBRYOLOGY - Abstract
The extracellular matrix (ECM) governs a wide spectrum of cellular fate processes, with a particular emphasis on anoikis, an integrin‐dependent form of cell death. Currently, anoikis is defined as an intrinsic apoptosis. In contrast to traditional apoptosis and necroptosis, integrin correlates ECM signaling with intracellular signaling cascades, describing the full process of anoikis. However, anoikis is frequently overlooked in physiological and pathological processes as well as traditional in vitro research models. In this review, we summarized the role of anoikis in physiological and pathological processes, spanning embryonic development, organ development, tissue repair, inflammatory responses, cardiovascular diseases, tumor metastasis, and so on. Similarly, in the realm of stem cell research focused on the functional evolution of cells, anoikis offers a potential solution to various challenges, including in vitro cell culture models, stem cell therapy, cell transplantation, and engineering applications, which are largely based on the regulation of cell fate by anoikis. More importantly, the regulatory mechanisms of anoikis based on molecular processes and ECM signaling will provide new strategies for therapeutic interventions (drug therapy and cell‐based therapy) in disease. In summary, this review provides a systematic elaboration of anoikis, thus shedding light on its future research. [ABSTRACT FROM AUTHOR]
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- 2024
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27. Standalone Ni‐Free Electrode for Direct Urea/Urine Real Fuel Cell Operation.
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Sayed, Enas Taha, Alwadai, Norah, Alshatwi, Manar, and Meo, Santolo
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OPEN-circuit voltage ,COPPER surfaces ,COPPER ,FUEL cells ,ELECTRIC power production - Abstract
Developing cost‐effective, durable anode electrodes is essential for commercializing direct urea fuel cells (FCs). In the current study, standalone copper hydroxide nanograss was grown on the surface of the copper foam at room temperature. The surface morphology, elemental analysis, and crystalline structure were investigated. The prepared materials demonstrated a high activity towards urea electro‐oxidation that increased with increasing urea concentration and slightly decreased at 4 M. The generated current using the modified electrodes is almost twice that obtained using the bare copper foam. The electrodes effectively operated for a prolonged current discharge (15 hr) using 3 M urea with outstanding stability. The morphology of the nanograss was retained even after such a very long time of operation. Moreover, the prepared materials are effectively used for the current generation from real urine with and without pH adjustment. Finally, real FC operation using urine was verified, showing an open circuit voltage of 1 V. The cell was operated for a long time, demonstrating the potential of the prepared electrodes for commercialization to realize simultaneous wastewater treatment and electricity generation from urine and other urea‐contaminated wastewater. [ABSTRACT FROM AUTHOR]
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- 2024
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28. Structural Color Colloidal Photonic Crystals for Biomedical Applications.
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Zhang, Wenhui, Hu, Yangnan, Feng, Pan, Li, Zhe, Zhang, Hui, Zhang, Bin, Xu, Dongyu, Qi, Jieyu, Wang, Huan, Xu, Lei, Li, Zhou, Xia, Ming, Li, Jilai, Chai, Renjie, and Tian, Lei
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PHOTONIC crystals ,STRUCTURAL colors ,COLLOIDAL crystals ,OPTICAL materials ,DIELECTRIC materials - Abstract
Photonic crystals are a new class of optical microstructure materials characterized by a dielectric constant that varies periodically with space and features a photonic bandgap. Inspired by natural photonic crystals such as butterfly scales, a series of artificial photonic crystals are developed for use in integrated photonic platforms, biosensing, communication, and other fields. Among them, colloidal photonic crystals (CPCs) have gained widespread attention due to their excellent optical properties and advantages, such as ease of preparation and functionalization. This work reviews the classification and self‐assembly principles of CPCs, details some of the latest biomedical applications of large‐area, high‐quality CPCs prepared using advanced self‐assembly methods, summarizes the existing challenges in CPC construction and application, and anticipates future development directions and optimization strategy. With further advancements, CPCs are expected to play a more critical role in biosensors, drug delivery, cell research, and other fields, bringing significant benefits to biomedical research and clinical practice. [ABSTRACT FROM AUTHOR]
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- 2024
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29. Hyperactivation of mTOR/eIF4E Signaling Pathway Promotes the Production of Tryptophan‐To‐Phenylalanine Substitutants in EBV‐Positive Gastric Cancer.
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Zheng, Zi‐Qi, Zhong, Cheng‐Rui, Wei, Cheng‐Zhi, Chen, Xiao‐Jiang, Chen, Guo‐Ming, Nie, Run‐Cong, Chen, Ze‐Wei, Zhang, Fei‐Yang, Li, Yuan‐Fang, Zhou, Zhi‐Wei, Chen, Yong‐Ming, and Liang, Ye‐Lin
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STOMACH cancer ,GENETIC translation ,MESSENGER RNA ,ANTIGEN presentation ,PROTEIN synthesis ,TRYPTOPHAN - Abstract
Although messenger RNA translation is tightly regulated to preserve protein synthesis and cellular homeostasis, chronic exposure to interferon‐γ (IFN‐γ) in several cancers can lead to tryptophan (Trp) shortage via the indoleamine‐2,3‐dioxygenase (IDO)‐ kynurenine pathway and therefore promotes the production of aberrant peptides by ribosomal frameshifting and tryptophan‐to‐phenylalanine (W>F) codon reassignment events (substitutants) specifically at Trp codons. However, the effect of Trp depletion on the generation of aberrant peptides by ribosomal mistranslation in gastric cancer (GC) is still obscure. Here, it is shows that the abundant infiltrating lymphocytes in EBV‐positive GC continuously secreted IFN‐γ, upregulated IDO1 expression, leading to Trp shortage and the induction of W>F substitutants. Intriguingly, the production of W>F substitutants in EBV‐positive GC is linked to antigen presentation and the activation of the mTOR/eIF4E signaling pathway. Inhibiting either the mTOR/eIF4E pathway or EIF4E expression counteracted the production and antigen presentation of W>F substitutants. Thus, the mTOR/eIF4E pathway exposed the vulnerability of gastric cancer by accelerating the production of aberrant peptides and boosting immune activation through W>F substitutant events. This work proposes that EBV‐positive GC patients with mTOR/eIF4E hyperactivation may benefit from anti‐tumor immunotherapy. [ABSTRACT FROM AUTHOR]
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- 2024
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30. Controlling Triboelectric Charge of MOFs by Leveraging Ligands Chemistry.
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Noman, Muhammad, Saqib, Qazi Muhammad, Ameen, Shahid, Patil, Swapnil R., Patil, Chandrashekhar S., Kim, Jungmin, Ko, Youngbin, Kim, BongSoo, and Bae, Jinho
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NANOGENERATORS ,TRIBOELECTRICITY ,LIGANDS (Chemistry) ,TEREPHTHALIC acid ,TRICARBOXYLIC acids - Abstract
Metal–organic frameworks (MOFs) have emerged as promising materials for triboelectric nanogenerators (TENGs), but the effects of ligand choice on triboelectric charge remain underexplored. Hence, this paper demonstrates the effect of single, binary, and ternary ligands on TENG performance of cobalt/cerium‐based (Co─Ce) bimetallic MOFs utilizing 2‐methylimidazole (2Melm), terephthalic acid (BDC), and benzene tricarboxylic acid (BTC) as ligands. The detailed structural characterization revealed that varying ligand chemistries led to distinct MOF features affecting TENG performance. Single ligand bimetallic MOFs (designated as CoCe‐2MeIm, CoCe‐BDC, CoCe‐BTC) has lower performance than binary ligand (designated as CoCe‐2MeIm‐BDC, CoCe‐2MeIm‐BTC, CoCe‐BDC‐BTC) and ternary ligand MOFs (designated as CoCe‐2MeIm‐BDC‐BTC). Among all, the binary ligand MOF, CoCe‐2MeIm‐BTC, shows the best results (598 V, 26.7 µA) due to the combined effect of imidazole ring and (─COO─) groups. This is attributed to lone pairs on nitrogen atoms and a delocalized π‐electron system in imidazole system in this material. CoCe‐BTC has the lowest results (31 V, 3.2 µA) due to the bulkier nature of the electron‐withdrawing (─COO─) groups and their impact on the π‐electron system of the benzene ring. This study showcases the potential of ligand chemistry manipulation to control triboelectric charge and thereby enhance MOF‐based TENG performance. [ABSTRACT FROM AUTHOR]
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- 2024
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31. Observation of Fast Low‐Temperature Oxygen Ion Conduction in CeO2/β"‐Al2O3 Heterostructure.
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Zhang, Yingbo, Zhu, Decai, Zhao, Zhonglong, Liu, Jiamei, Ouyang, Yuzhao, Yu, Jiangyu, Liu, Zhongqing, Bai, Xixi, Wang, Nan, Zhuang, Lin, Liu, Wuming, and Zhu, Chengjun
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SOLID oxide fuel cells ,ELECTRIC conductivity ,IONIC conductivity ,MELTING points ,THERMAL batteries - Abstract
Semiconductor ion fuel cells (SIFCs) have demonstrated impressive ionic conductivity and efficient power generation at temperatures below 600 °C. However, the lack of understanding of the ionic conduction mechanisms associated with composite electrolytes has impeded the advancement of SIFCs toward lower operating temperatures. In this study, a CeO2/β″‐Al2O3 heterostructure electrolyte is introduced, incorporating β″‐Al2O3 and leveraging the local electric field (LEF) as well as the manipulation of the melting point temperature of carbonate/hydroxide (C/H) by Na+ and Mg2+ from β″‐Al2O3. This design successfully maintains swift interfacial conduction of oxygen ions at 350 °C. Consequently, the fuel cell device achieved an exceptional ionic conductivity of 0.019 S/cm and a power output of 85.9 mW/cm2 at 350 °C. The system attained a peak power density of 1 W/cm2 with an ultra‐high ionic conductivity of 0.197 S/cm at 550 °C. The results indicate that through engineering the LEF and incorporating the lower melting point C/H, there approach effectively observed oxygen ion transport at low temperatures (350 °C), effectively overcoming the issue of cell failure at temperatures below 419 °C. This study presents a promising methodology for further developing high‐performance semiconductor ion fuel cells in the low temperature range of 300–600 °C. [ABSTRACT FROM AUTHOR]
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- 2024
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32. Materials Containing Single‐, Di‐, Tri‐, and Multi‐Metal Atoms Bonded to C, N, S, P, B, and O Species as Advanced Catalysts for Energy, Sensor, and Biomedical Applications.
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Tiwari, Jitendra N., Kumar, Krishan, Safarkhani, Moein, Umer, Muhammad, Vilian, A. T. Ezhil, Beloqui, Ana, Bhaskaran, Gokul, Huh, Yun Suk, and Han, Young‐Kyu
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OXYGEN evolution reactions ,ELECTRON configuration ,SYNTHETIC enzymes ,CHEMICAL reactions ,HYDROGEN evolution reactions - Abstract
Modifying the coordination or local environments of single‐, di‐, tri‐, and multi‐metal atom (SMA/DMA/TMA/MMA)‐based materials is one of the best strategies for increasing the catalytic activities, selectivity, and long‐term durability of these materials. Advanced sheet materials supported by metal atom‐based materials have become a critical topic in the fields of renewable energy conversion systems, storage devices, sensors, and biomedicine owing to the maximum atom utilization efficiency, precisely located metal centers, specific electron configurations, unique reactivity, and precise chemical tunability. Several sheet materials offer excellent support for metal atom‐based materials and are attractive for applications in energy, sensors, and medical research, such as in oxygen reduction, oxygen production, hydrogen generation, fuel production, selective chemical detection, and enzymatic reactions. The strong metal–metal and metal–carbon with metal–heteroatom (i.e., N, S, P, B, and O) bonds stabilize and optimize the electronic structures of the metal atoms due to strong interfacial interactions, yielding excellent catalytic activities. These materials provide excellent models for understanding the fundamental problems with multistep chemical reactions. This review summarizes the substrate structure‐activity relationship of metal atom‐based materials with different active sites based on experimental and theoretical data. Additionally, the new synthesis procedures, physicochemical characterizations, and energy and biomedical applications are discussed. Finally, the remaining challenges in developing efficient SMA/DMA/TMA/MMA‐based materials are presented. [ABSTRACT FROM AUTHOR]
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- 2024
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33. Exploring the role of the Internet of Things in green buildings.
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Fakhabi, Mona Masroor, Hamidian, Seyed Mohammad, and Aliehyaei, Mehdi
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SUSTAINABLE buildings ,ENERGY shortages ,ENERGY conservation ,ELECTRIC power consumption ,CLEAN energy ,ENERGY consumption ,ENERGY consumption of buildings ,INTELLIGENT buildings - Abstract
The global energy crisis has been one of the significant challenges for decades, threatening the global economy, and the health of our environment. The government's efforts to enhance the welfare and lifestyle of citizens have been partially undermined by a significant rise in energy intensity, resulting in increased energy consumption. Over the years, researchers have utilized historical energy consumption data to enhance energy efficiency through various technologies. Innovative smart technologies drive energy efficiency, reducing energy usage throughout all areas of the energy industry, from production and supply to consumption. This creates a balance in all sectors and indicates a decrease in energy demand in all areas of building infrastructure. Green buildings that utilize Internet of Things (IoT) technology employ sensors and software to collect data, optimizing, and enhancing building performance. This includes reducing energy and electricity consumption, improving air quality, and optimizing lighting throughout the day. These buildings can contribute to reaching zero‐energy building targets. It becomes challenging to manage green buildings without using centralized control. Therefore, managing and integrating these buildings with intelligent technologies is vital in achieving environmentally friendly management. This study offers a broad overview of the green building concept and explores the use of the green IoT in enhancing services and conserving energy within green buildings. The article aims to deliver an extensive review of green buildings and their advantages, analyze the technology behind the IoT and its integration with solar panels to lower energy consumption, and ultimately identify the challenges present in this area of research. [ABSTRACT FROM AUTHOR]
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- 2024
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34. A Flexible Skin Bionic Thermally Comfortable Wearable for Machine Learning‐Facilitated Ultrasensitive Sensing.
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Di, Pengju, Yuan, Yue, Xiao, Mingyue, Xu, Zhishan, Liu, Yicong, Huang, Chenlin, Xu, Guangyuan, Zhang, Liqun, and Wan, Pengbo
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POLYURETHANE elastomers ,FLEXIBLE electronics ,BORON nitride ,BIONICS ,ARTIFICIAL skin ,THERMAL comfort ,EPIDERMIS - Abstract
Tremendous popularity is observed for multifunctional flexible electronics with appealing applications in intelligent electronic skins, human–machine interfaces, and healthcare sensing. However, the reported sensing electronics, mostly can hardly provide ultrasensitive sensing sensitivity, wider sensing range, and robust cycling stability simultaneously, and are limited of efficient heat conduction out from the contacted skin interface after wearing flexible electronics on human skin to satisfy thermal comfort of human skin. Inspired from the ultrasensitive tactile perception microstructure (epidermis/spinosum/signal transmission) of human skin, a flexible comfortably wearable ultrasensitive electronics is hereby prepared from thermal conductive boron nitride nanosheets‐incorporated polyurethane elastomer matrix with MXene nanosheets‐coated surface microdomes as epidermis/spinosum layers assembled with interdigitated electrode as sensing signal transmission layer. It demonstrates appealing sensing performance with ultrasensitive sensitivity (≈288.95 kPa−1), up to 300 kPa sensing range, and up to 20 000 sensing cycles from obvious contact area variation between microdome microstructures and the contact electrode under external compression. Furthermore, the bioinspired electronics present advanced thermal management by timely efficient thermal dissipation out from the contacted skin surface to meet human skin thermal comfort with the incorporated thermal conductive boron nitride nanosheets. Thus, it is vitally promising in wearable artificial electronic skins, intelligent human‐interactive sensing, and personal health management. [ABSTRACT FROM AUTHOR]
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- 2024
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35. Regulation of Interface Ion Transport by Electron Ionic Conductor Construction toward High‐Voltage and High‐Rate LiNi0.5Co0.2Mn0.3O2 Cathodes in Lithium Ion Battery.
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Tian, Yunan, Li, Yuyu, Shen, Huasen, Cheng, Xiangxin, Cheng, Yiming, Zhang, Wen, Yu, Peng, Yang, Zehui, Xue, Lixing, Fan, Yameng, Zhao, Lingfei, Peng, Jian, Wang, Jiazhao, Li, Zhaohuai, Xie, Ming, Liu, Huakun, and Dou, Shixue
- Subjects
ATOMIC layer deposition ,PROTECTIVE coatings ,LITHIUM-ion batteries ,PHASE transitions ,POWER density ,ELECTRON transport - Abstract
Simultaneously achieving high‐energy‐density and high‐power‐density is a crucial yet challenging objective in the pursuit of commercialized power batteries. In this study, atomic layer deposition (ALD) is employed combined with a coordinated thermal treatment strategy to construct a densely packed, electron‐ion dual conductor (EIC) protective coating on the surface of commercial LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode material, further enhanced by gradient Al doping (Al@EIC‐NCM523). The ultra‐thin EIC effectively suppresses side reactions, thereby enhancing the stability of the cathode‐electrolyte interphase (CEI) at high‐voltages. The EIC's dual conduction capability provides a potent driving force for Li+ transport at the interface, promoting the formation of rapid ion deintercalation pathways within the Al@EIC‐NCM523 bulk phase. Moreover, the strategic gradient doping of Al serves to anchor the atomic spacing of Ni and O within the structure of Al@EIC‐NCM523, curbing irreversible phase transitions at high‐voltages and preserving the integrity of its layered structure. Remarkably, Al@EIC‐NCM523 displays an unprecedented rate capability (114.7 mAh g−1 at 20 C), and a sustained cycling performance (capacity retention of 74.72% after 800 cycles at 10 C) at 4.6 V. These findings demonstrate that the proposed EIC and doping strategy holds a significant promise for developing high‐energy‐density and high‐power‐density lithium‐ion batteries (LIBs). [ABSTRACT FROM AUTHOR]
- Published
- 2024
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36. The efficacy of enoxolone in reducing erythema and pain after laser treatment: A randomized split‐face pilot study.
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Choi, Sun Young, Koh, Young Gue, Roh, Yoon Jin, and Park, Kui Young
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ERYTHEMA ,PILOT projects ,LASERS ,LASER therapy - Abstract
Background: Enoxolone, derived from licorice, possesses potent anti‐inflammatory, and antioxidant properties. However, its effectiveness in alleviating post‐laser reactions has not been extensively studied. Aims: This randomized split‐face pilot study aimed to evaluate the effects of enoxolone on skin following laser treatment. Patients/Methods: Ten healthy subjects underwent non‐ablative 1550 nm Er:Glass fractional laser treatment and then randomly applied a moisturizer without enoxolone on one side of the face and a dermo‐cosmetic formular containing 2% enoxolone mixed with the same moisturizer on the other side. The erythema index (EI), clinician's erythema assessment (CEA), and pain scores were recorded at 30 min, 60 min, and 24 h posttreatment. Results: The group treated with enoxolone showed significantly lower EI and CEA compared to the control group at 24 h posttreatment. Additionally, pain scores were notably reduced in the enoxolone‐treated group 30 min after treatment. Conclusions: This study suggests that dermo‐cosmetic formular containing 2% enoxolone is effective in reducing erythema and pain following laser treatment. [ABSTRACT FROM AUTHOR]
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- 2024
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37. Multi‐material direct‐ink‐writing of silver‐based flexible and highly deformable dry electrocardiogram biopatches.
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Alsharif, Aljawharah A., Aviles, Jesus M., Zechel, Felipe M., Alsharif, Nouf A., and El‐Atab, Nazek
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RESOURCE-limited settings ,SILVER chloride ,ELECTROCARDIOGRAPHY ,ELECTRONIC equipment ,ELECTRODES ,PRINT materials - Abstract
Of significant interest are three‐dimensional (3D) printed dry electrodes, a departure from traditional wet silver/silver chloride (Ag/AgCl) electrodes. These innovative electrodes not only incorporate 3D printed personalized materials but also eliminate the need for electrolyte gel, which tends to dehydrate over time. Additionally, these electrodes boast unique attributes such as stretchability, deformability, biocompatibility, wearable comfort, and cost‐effective manufacturing. While the advantages of dry electrodes are apparent, their performance optimization encounters challenges related to charge migration, particularly when scaled down to miniaturized dimensions, impacting biosignal detection. This study addresses these challenges by focusing on the development of scalable, stretchable, and highly deformable syringe‐printed dry electrocardiogram (ECG) patches. The approach employs straightforward multi‐material direct‐ink‐writing (DIW) techniques, realizing complete biopatches per print, resulting in a rapid and cost‐effective fabrication process. The achieved printing resolution reaches up to 200 µm, and the conductivity of Ag/AgCl dry electrodes reaches approximately ∼ 5 × 104 S/m. This not only ensures scalability but also expands the applications of metal‐based inks to various soft electronic devices, particularly in low‐resource settings and environments. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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38. Cucurbitacins mitigate vascular neointimal hyperplasia by suppressing cyclin A2 expression and inhibiting VSMC proliferation.
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Yuan, Ruqiang, Qian, Lei, Xu, Hu, and Yun, Weijing
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- 2024
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39. Why Do DJF 2023/24 Upper‐Level 200‐hPa Geopotential Height Forecasts Look Different From the Expected El Niño Response?
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Chen, Mingyue, Kumar, Arun, L'Heureux, Michelle, Peng, Peitao, Zhang, Tao, Hoerling, Martin P., and Diaz, Henry F.
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EL Nino ,GEOPOTENTIAL height ,SOUTHERN oscillation ,GLOBAL warming ,FORECASTING ,OCEAN temperature ,LONG-range weather forecasting - Abstract
We investigate why the North American Multi‐Model Ensemble (NMME) upper‐level height forecast for December–February (DJF) 2023/24 differs from the expected El Niño response. These atypical height anomalies emerged despite the fact a strong El Niño was forecast. The analysis focuses on diagnosing the NMME forecasts of DJF 2023/24 for SSTs and 200‐hPa heights initialized at the beginning of November 2023 relative to other ensemble mean NMME DJF forecasts dating back to 1982. The results demonstrate that forecasts of the 200‐hPa height anomalies had a large contribution from warming trends in global SSTs. It is the combination of trends and the expected El Niño teleconnection that results in the forecast height anomalies. Increasingly, for forecasts of geopotential height anomalies during the recent El Niño winters, the amplitude of trends is nearly equal to the signal from El Niño and has implications for the climatological base period selection for seasonal forecasts. Plain Language Summary: Seasonal forecasts are cast as anomalies as users want to know what can be expected beyond the typical seasonal swings of the climate. This necessitates a choice for the climatological base period relative to which forecast anomalies are computed. It, however, poses a challenge under rapid climate change. In this scenario, climate trends become part of the real‐time forecast anomalies, and if the climatological base period is sufficiently different, may even start to dominate. This was the case for the NMME DJF 2023/24 forecast of 200‐hPa heights which was forecast to be a strong El Niño, and yet, forecast for 200‐hPa heights differed from typical El Niño signal. The analysis implies that seasonal forecasts for some variables, consideration of trends is important and reliance on expected signal from El Niño—Southern Oscillation alone may not be sufficient. Key Points: The North American Multi‐Model Ensemble (NMME) seasonal forecasts for December–February (DJF) 2023/24 upper‐level height differ from the expected El Niño signalIt is the combination of trends in heights and the expected El Niño signal that results in the forecast NMME ensemble mean heights anomaliesThe forecast of trends is increasingly important to account for NMME forecast anomaly and their amplitude in recent years can be of same magnitude as the signal from El Niño [ABSTRACT FROM AUTHOR]
- Published
- 2024
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40. Potential Gradient‐Driven Dual‐Functional Electrochromic and Electrochemical Device Based on a Shared Electrode Design.
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Xu, Gang, Zhang, Wei, Zhu, Guangjun, Xia, Huan, Zhang, Hanning, Xie, Qian, Jin, Peng, Zhang, Haoyu, Yi, Chengjie, Zhang, Ruqian, Ji, Lingfeng, Shui, Tao, Moloto, Nosipho, She, Wei, and Sun, ZhengMing
- Subjects
ELECTROCHROMIC devices ,ELECTROCHEMICAL apparatus ,ENERGY storage ,ELECTRODES ,PRUSSIAN blue ,WEARABLE technology - Abstract
The integration of electrochromic devices and energy storage systems in wearable electronics is highly desirable yet challenging, because self‐powered electrochromic devices often require an open system design for continuous replenishment of the strong oxidants to enable the coloring/bleaching processes. A self‐powered electrochromic device has been developed with a close configuration by integrating a Zn/MnO2 ionic battery into the Prussian blue (PB)‐based electrochromic system. Zn and MnO2 electrodes, as dual shared electrodes, the former one can reduce the PB electrode to the Prussian white (PW) electrode and serves as the anode in the battery; the latter electrode can oxidize the PW electrode to its initial state and acts as the cathode in the battery. The bleaching/coloring processes are driven by the gradient potential between Zn/PB and PW/MnO2 electrodes. The as‐prepared Zn||PB||MnO2 system demonstrates superior electrochromic performance, including excellent optical contrast (80.6%), fast self‐bleaching/coloring speed (2.0/3.2 s for bleaching/coloring), and long‐term self‐powered electrochromic cycles. An air‐working Zn||PB||MnO2 device is also developed with a 70.3% optical contrast, fast switching speed (2.2/4.8 s for bleaching/coloring), and over 80 self‐bleaching/coloring cycles. Furthermore, the closed nature enables the fabrication of various flexible electrochromic devices, exhibiting great potentials for the next‐generation wearable electrochromic devices. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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41. High‐frequency repetitive transcranial magnetic stimulation ameliorates memory impairment by inhibiting neuroinflammation in the chronic cerebral hypoperfusion mice.
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Zou, Huihui, Bao, Shilin, Chen, Xinrun, Zhou, Xianju, and Zhang, Shaotian
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- 2024
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42. The protective effects of repetitive transcranial magnetic stimulation with different high frequencies on motor functions in MPTP/probenecid induced Parkinsonism mouse models.
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Lyu, Zhimai, Xiao, Guodong, Xie, Dingyi, Huang, Dandan, Chen, Yanjun, Wu, Chunmei, Lai, Yanwei, Song, Zitan, Huang, Lijuan, Ming, Hui, Jiang, Yichen, Wang, Jinwei, Chen, Rixin, and Luo, Weifeng
- Published
- 2024
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43. High‐quality chromosome‐level genome assembly and multi‐omics analysis of rosemary (Salvia rosmarinus) reveals new insights into the environmental and genome adaptation.
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Lai, Yong, Ma, Jinghua, Zhang, Xuebin, Xuan, Xiaobo, Zhu, Fengyun, Ding, Shen, Shang, Fude, Chen, Yuanyuan, Zhao, Bing, Lan, Chen, Unver, Turgay, Huo, George, Li, Ximei, Wang, Yihan, Liu, Yufang, Lu, Mengfei, Pan, Xiaoping, Yang, Deshuang, Li, Mingwan, and Zhang, Baohong
- Subjects
BIOLOGICAL evolution ,MULTIOMICS ,ROSMARINIC acid ,SALVIA ,ROSEMARY ,CHROMOSOMES ,DROUGHT tolerance ,COMPARATIVE genomics - Abstract
Summary: High‐quality genome of rosemary (Salvia rosmarinus) represents a valuable resource and tool for understanding genome evolution and environmental adaptation as well as its genetic improvement. However, the existing rosemary genome did not provide insights into the relationship between antioxidant components and environmental adaptability. In this study, by employing Nanopore sequencing and Hi‐C technologies, a total of 1.17 Gb (97.96%) genome sequences were mapped to 12 chromosomes with 46 121 protein‐coding genes and 1265 non‐coding RNA genes. Comparative genome analysis reveals that rosemary had a closely genetic relationship with Salvia splendens and Salvia miltiorrhiza, and it diverged from them approximately 33.7 million years ago (MYA), and one whole‐genome duplication occurred around 28.3 MYA in rosemary genome. Among all identified rosemary genes, 1918 gene families were expanded, 35 of which are involved in the biosynthesis of antioxidant components. These expanded gene families enhance the ability of rosemary adaptation to adverse environments. Multi‐omics (integrated transcriptome and metabolome) analysis showed the tissue‐specific distribution of antioxidant components related to environmental adaptation. During the drought, heat and salt stress treatments, 36 genes in the biosynthesis pathways of carnosic acid, rosmarinic acid and flavonoids were up‐regulated, illustrating the important role of these antioxidant components in responding to abiotic stresses by adjusting ROS homeostasis. Moreover, cooperating with the photosynthesis, substance and energy metabolism, protein and ion balance, the collaborative system maintained cell stability and improved the ability of rosemary against harsh environment. This study provides a genomic data platform for gene discovery and precision breeding in rosemary. Our results also provide new insights into the adaptive evolution of rosemary and the contribution of antioxidant components in resistance to harsh environments. [ABSTRACT FROM AUTHOR]
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- 2024
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44. Biomimetic Chiral Nanomaterials with Selective Catalysis Activity.
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Cao, Honghui, Yang, En, Kim, Yoonseob, Zhao, Yuan, and Ma, Wei
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CATALYTIC activity ,NANOSTRUCTURED materials ,ENANTIOSELECTIVE catalysis ,BIOMACROMOLECULES ,LIGANDS (Biochemistry) ,BIOCATALYSIS - Abstract
Chiral nanomaterials with unique chiral configurations and biocompatible ligands have been booming over the past decade for their interesting chiroptical effect, unique catalytical activity, and related bioapplications. The catalytic activity and selectivity of chiral nanomaterials have emerged as important topics, that can be potentially controlled and optimized by the rational biochemical design of nanomaterials. In this review, chiral nanomaterials synthesis, composition, and catalytic performances of different biohybrid chiral nanomaterials are discussed. The construction of chiral nanomaterials with multiscale chiral geometries along with the underlying principles for enhancing chiroptical responses are highlighted. Various biochemical approaches to regulate the selectivity and catalytic activity of chiral nanomaterials for biocatalysis are also summarized. Furthermore, attention is paid to specific chiral ligands, materials compositions, structure characteristics, and so on for introducing selective catalytic activities of representative chiral nanomaterials, with emphasis on substrates including small molecules, biological macromolecule, and in‐site catalysis in living systems. Promising progress has also been emphasized in chiral nanomaterials featuring structural versatility and improved chiral responses that gave rise to unprecedented chances to utilize light for biocatalytic applications. In summary, the challenges, future trends, and prospects associated with chiral nanomaterials for catalysis are comprehensively proposed. [ABSTRACT FROM AUTHOR]
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- 2024
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45. Catalytically Active Carbon for Oxygen Reduction Reaction in Energy Conversion: Recent Advances and Future Perspectives.
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Liu, Shuling, Wang, Ao, Liu, Yanyan, Zhou, Wenshu, Wen, Hao, Zhang, Huanhuan, Sun, Kang, Li, Shuqi, Zhou, Jingjing, Wang, Yongfeng, Jiang, Jianchun, and Li, Baojun
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ENERGY conversion ,ENERGY development ,CHEMICAL energy ,OXYGEN reduction ,POWER resources ,ENERGY consumption - Abstract
The shortage and unevenness of fossil energy sources are affecting the development and progress of human civilization. The technology of efficiently converting material resources into energy for utilization and storage is attracting the attention of researchers. Environmentally friendly biomass materials are a treasure to drive the development of new‐generation energy sources. Electrochemical theory is used to efficiently convert the chemical energy of chemical substances into electrical energy. In recent years, significant progress has been made in the development of green and economical electrocatalysts for oxygen reduction reaction (ORR). Although many reviews have been reported around the application of biomass‐derived catalytically active carbon (CAC) catalysts in ORR, these reviews have only selected a single/partial topic (including synthesis and preparation of catalysts from different sources, structural optimization, or performance enhancement methods based on CAC catalysts, and application of biomass‐derived CACs) for discussion. There is no review that systematically addresses the latest progress in the synthesis, performance enhancement, and applications related to biomass‐derived CAC‐based oxygen reduction electrocatalysts synchronously. This review fills the gap by providing a timely and comprehensive review and summary from the following sections: the exposition of the basic catalytic principles of ORR, the summary of the chemical composition and structural properties of various types of biomass, the analysis of traditional and the latest popular biomass‐derived CAC synthesis methods and optimization strategies, and the summary of the practical applications of biomass‐derived CAC‐based oxidative reduction electrocatalysts. This review provides a comprehensive summary of the latest advances to provide research directions and design ideas for the development of catalyst synthesis/optimization and contributes to the industrialization of biomass‐derived CAC electrocatalysis and electric energy storage. [ABSTRACT FROM AUTHOR]
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- 2024
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46. Neuroprotective Effects of Cannabispirenone A against NMDA-Induced Excitotoxicity in Differentiated N2a Cells.
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Thapa, Sonia, Nalli, Yedukondalu, Singh, Ajeet, Singh, Shashank Kr., and Ali, Asif
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- 2024
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47. Aqueous Ethanolic Extract of Inonotus obliquus Ameliorates Polycystic Ovarian Syndrome by Modulating Oxidative Stress and Downregulating TNF-α and Interleukin-6.
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Zhang, Jiangsheng, Saeed, Ayesha, Hussain, Musaddique, Siddique, Rida, Xu, Hao, Bazmi, Rizwan Rashid, Hussain, Liaqat, and Lv, Guiyuan
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CHLOROGENIC acid ,OXIDATIVE stress ,INTERLEUKIN-6 ,BENZOIC acid ,GRANULOSA cells ,OVARIAN follicle ,RECURRENT miscarriage ,GALLIC acid - Abstract
Polycystic ovarian syndrome (PCOS) is a complex metabolic and endocrine disorder with multifactorial etiology and complex pathogenesis. These intrinsic physiological changes cause anovulation, infertility, and miscarriage in women and exacerbate their chances of becoming hyperlipidemic and diabetic. Inonotus obliquus has been used traditionally for infertility problems. The present study aimed to investigate the therapeutic effects of aqueous ethanolic extract of Inonotus obliquus (AEIO) in female rats with letrozole-induced PCOS, along with the determination of its possible mechanism. HPLC analysis revealed the presence of gallic acid, chlorogenic acid, rutin, p-coumaric, benzoic acid, quercetin, salicylic acid, and kaempferol. Thirty female albino rats were acquired and divided into two groups (5 + 25) to induce PCOS. Letrozole (1 mg/kg) was used to induce the disease for 7 weeks (25 rats) except for the normal control (5 rats). The disease was confirmed by vaginal smear cytology, weight gain, and endocrinopathy. After disease induction, rats were divided into five groups (five rats in each group; disease control, metformin 20 mg/kg, AEIO 100, 300, and 500 mg/kg). After completion of the study, the animals were euthanized under the influence of anesthesia (chloroform). Ovaries were removed for histopathology, the liver was evaluated for oxidative stress biomarkers, and blood samples were collected for biochemical evaluation. Ovarian histopathology showed an abnormal architecture with cystic follicles and abnormal granulosa cells. Interestingly, treatment with AEIO restored normal ovarian histology with primary, growing, and developing follicles. After conducting a hormonal analysis, it was found that the induction of PCOS led to a significant increase (p < 0.001) in luteinizing hormone (LH), insulin, and testosterone levels, while the levels of follicle-stimulating hormone (FSH) decreased. However, treatment with AEIO at doses of 100–500 mg/kg restored these levels to normal. PCOS induction also resulted in oxidative stress and lipid peroxidation by significantly decreasing antioxidant enzymatic markers (SOD, CAT, and GSH) and increasing levels of lipid peroxidation enzymatic markers (MDA). AEIO restored the levels of superoxide dismutase (SOD), catalase (CAT), and glutathione (GSH), and reduced the level of malondialdehyde (MDA). In conclusion, antioxidant phytochemicals (gallic acid, chlorogenic acid, rutin, p-coumaric, benzoic acid, quercetin, salicylic acid, and kaempferol) rich extract alleviated PCOS symptomatology through modulating oxidative stress markers and eliminating ovarian low-grade inflammation by downregulating the expression of NF-κB associated TNF-α and IL-6. [ABSTRACT FROM AUTHOR]
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- 2024
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48. BDNF/TrkB activators in Parkinson's disease: A new therapeutic strategy.
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Ali, Naif H., Al‐Kuraishy, Hayder M., Al‐Gareeb, Ali I., Alexiou, Athanasios, Papadakis, Marios, AlAseeri, Ali Abdullah, Alruwaili, Mubarak, Saad, Hebatallah M., and Batiha, Gaber El‐Saber
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PARKINSON'S disease ,MOVEMENT disorders ,BRAIN-derived neurotrophic factor ,DOPAMINERGIC neurons ,SUBSTANTIA nigra ,GROWTH factors - Abstract
Parkinson's disease (PD) is a neurodegenerative disorder of the brain and is manifested by motor and non‐motor symptoms because of degenerative changes in dopaminergic neurons of the substantia nigra. PD neuropathology is associated with mitochondrial dysfunction, oxidative damage and apoptosis. Thus, the modulation of mitochondrial dysfunction, oxidative damage and apoptosis by growth factors could be a novel boulevard in the management of PD. Brain‐derived neurotrophic factor (BDNF) and its receptor tropomyosin receptor kinase type B (TrkB) are chiefly involved in PD neuropathology. BDNF promotes the survival of dopaminergic neurons in the substantia nigra and enhances the functional activity of striatal neurons. Deficiency of the TrkB receptor triggers degeneration of dopaminergic neurons and accumulation of α‐Syn in the substantia nigra. As well, BDNF/TrkB signalling is reduced in the early phase of PD neuropathology. Targeting of BDNF/TrkB signalling by specific activators may attenuate PD neuropathology. Thus, this review aimed to discuss the potential role of BDNF/TrkB activators against PD. In conclusion, BDNF/TrkB signalling is decreased in PD and linked with disease severity and long‐term complications. Activation of BDNF/TrkB by specific activators may attenuate PD neuropathology. [ABSTRACT FROM AUTHOR]
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- 2024
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49. Puerarin mitigated LPS‐ATP or HG‐primed endothelial cells damage and diabetes‐associated cardiovascular disease via ROS‐NLRP3 signalling.
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Wei, Huizhen, Sun, Mengru, Wang, Ruixuan, Zeng, Hairong, Zhao, Bei, and Jin, Shenyi
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DIABETIC angiopathies ,ISOFLAVONES ,ENDOTHELIAL cells ,CARDIOVASCULAR diseases ,TYPE 2 diabetes - Abstract
The occurrence and development of diabetic vascular diseases are closely linked to inflammation‐induced endothelial dysfunction. Puerarin (Pue), the primary component of Pueraria lobata, possesses potent anti‐inflammatory properties. However, its vasoprotective role remains elusive. Therefore, we investigated whether Pue can effectively protect against vascular damage induced by diabetes. In the study, Pue ameliorated lipopolysaccharide‐adenosine triphosphate (LPS‐ATP) or HG‐primed cytotoxicity and apoptosis, while inhibited reactive oxygen species (ROS)‐mediated NLR family pyrin domain containing 3 (NLRP3) inflammasome in HUVECs, as evidenced by significantly decreased ROS level, NOX4, Caspase‐1 activity and expression of NLRP3, GSDMD, cleaved caspase‐1, IL‐1β and IL‐18. Meanwhile, ROS inducer CoCI2 efficiently weakened the effects of Pue against LPS‐ATP‐primed pyroptosis. In addition, NLRP3 knockdown notably enhanced Pue's ability to suppress pyroptosis in LPS‐ATP‐primed HUVECs, whereas overexpression of NLRP3 reversed the inhibitory effects of Pue. Furthermore, Pue inhibited the expression of ROS and NLRP3 inflammasome‐associated proteins on the aorta in type 2 diabetes mellitus rats. Our findings indicated that Pue might ameliorate LPS‐ATP or HG‐primed damage in HUVECs by inactivating the ROS‐NLRP3 signalling pathway. [ABSTRACT FROM AUTHOR]
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- 2024
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50. Identification of pathogenic germline variants in a large Chinese lung cancer cohort by clinical sequencing.
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Yu, Zhe, Zhang, Zirui, Liu, Jun, Wu, Xiaoying, Fan, Xiaojun, Pang, Jiaohui, Bao, Hua, Yin, Jiani, Wu, Xue, Shao, Yang, Liu, Zhengcheng, and Liu, Fang
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- 2024
- Full Text
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