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Conformational dynamics as an intrinsic determinant of prion protein misfolding and neurotoxicity
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作者 Alessandro Cembran Pedro Fernandez-Funez 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第10期2095-2096,共2页
The prion protein(PrP) is the key molecular and pathological mediator of prion diseases,a heterogeneous group of brain disorders with fatal outcomes.Prion diseases are rare but deserve special attention because of the... The prion protein(PrP) is the key molecular and pathological mediator of prion diseases,a heterogeneous group of brain disorders with fatal outcomes.Prion diseases are rare but deserve special attention because of their unique familial,sporadic,and transmissible etiologies,all caused by a single agent:misfolded conformations of PrP. 展开更多
关键词 FOLDING INTRINSIC DYNAMICS
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"Win-Win"Scenario of High Energy Density and Long Cycling Life in a Novel Na_(3.9)MnCr_(0.9)Zr_(0.1)(PO_(4))_(3)Cathode
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作者 Yao Wang Yukun Liu +7 位作者 Pingge He Junteng Jin Xudong Zhao Qiuyu Shen Jie Li Xuanhui Qu Yongchang Liu Lifang Jiao 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第1期83-90,共8页
The development of high-energy and long-lifespan NASICON-type cathode materials for sodium-ion batteries has always been a research hotspot but a daunting challenge.Although Na_(4)MnCr(PO_(4))_(3)has emerged as one of... The development of high-energy and long-lifespan NASICON-type cathode materials for sodium-ion batteries has always been a research hotspot but a daunting challenge.Although Na_(4)MnCr(PO_(4))_(3)has emerged as one of the most promising high-energy-density cathode materials owing to its three-electron reactions,it still suffers from serious structural distortion upon repetitive charge/discharge processes caused by the Jahn-Teller active Mn^(3+).Herein,the selective substitution of Cr by Zr in Na_(4)MnCr(PO_(4))_(3)was explored to enhance the structural stability,due to the pinning effect of Zr ions and the≈2.9-electron reactions,as-prepared Na_(3.9)MnCr_(0.9)Zr_(0.1)(PO_(4))_(3)/C delivers a high capacity retention of 85.94%over 500 cycles at 5 C and an ultrahigh capacity of 156.4 mAh g^(-1)at 0.1 C,enabling the stable energy output as high as 555.2 Wh kg^(-1).Moreover,during the whole charge/discharge process,a small volume change of only 6.7%was verified by in situ X-ray diffraction,and the reversible reactions of Cr^(3+)/Cr^(4+),Mn^(3+)/Mn^(4+),and Mn^(2+)/Mn^(3+)redox couples were identified via ex situ X-ray photoelectron spectroscopy analyses.Galvanostatic intermittent titration technique tests and density functional theory calculations further demonstrated the fast reaction kinetics of the Na_(3.9)MnCr_(0.9)Zr_(0.1)(PO_(4))_(3)/C electrode.This work offers new opportunities for designing high-energy and high-stability NASICON cathodes by ion doping. 展开更多
关键词 high energy density mechanism investigation NASICON-type cathodes sodium-ion batteries structure modification
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Comparative analysis of SIMILAR to RCD ONE(SRO)family from tetraploid cotton species and their diploid progenitors depict their significance in cotton growth and development
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作者 SHABAN Muhammad TABASSUM Riaz +5 位作者 RANA Iqrar Ahmad ATIF Rana Muhammad AZMAT Muhammad Abubakkar IQBAL Zubair MAJEED Sajid AZHAR Muhammad Tehseen 《Journal of Cotton Research》 CAS 2024年第1期45-57,共13页
Background SRO(Similar to RCD1)genes family is largely recognized for their importance in the growth,develop-ment,and in responding to environmental stresses.However,genome-wide identification and functional character... Background SRO(Similar to RCD1)genes family is largely recognized for their importance in the growth,develop-ment,and in responding to environmental stresses.However,genome-wide identification and functional characteri-zation of SRO genes from cotton species have not been reported so far.Results A total of 36 SRO genes were identified from four cotton species.Phylogenetic analysis divided these genes into three groups with distinct structure.Syntenic and chromosomal distribution analysis indicated uneven distribu-tion of GaSRO,GrSRO,GhSRO,and GbSRO genes on A2,D5 genomes,Gh-At,Gh-Dt,Gb-At,and Gb-Dt subgenomes,respectively.Gene duplication analysis revealed the presence of six duplicated gene pairs among GhSRO genes.In promoter analysis,several elements responsive to the growth,development and hormones were found in GhSRO genes,implying gene induction during cotton growth and development.Several miRNAs responsive to plant growth and abiotic stress were predicted to target 12 GhSRO genes.Organ-specific expression profiling demonstrated the roles of GhSRO genes in one or more tissues.In addition,specific expression pattern of some GhSRO genes dur-ing ovule development depicted their involvement in these developmental processes.Conclusion The data presented in this report laid a foundation for understanding the classification and functions of SRO genes in cotton. 展开更多
关键词 COTTON SRO MIRNAS Gene duplications Gene expression Ovule development
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Self-Catalyzed Rechargeable Lithium-Air Battery by in situ Metal Ion Doping of Discharge Products: A Combined Theoretical and Experimental Study 被引量:5
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作者 Mengwei Yuan Zemin Sun +6 位作者 Han Yang Di Wang Qiming Liu Caiyun Nan Huifeng Li Genban Sun Shaowei Chen 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第1期129-137,共9页
Lithium-air battery has emerged as a viable electrochemical energy technology;yet a substantial overpotential is typically observed,due to the insulating nature of the discharge product Li_(2)O_(2) that hinders the re... Lithium-air battery has emerged as a viable electrochemical energy technology;yet a substantial overpotential is typically observed,due to the insulating nature of the discharge product Li_(2)O_(2) that hinders the reaction kinetics and device performance.Furthermore,finite solid–solid/-liquid interfaces are formed between Li_(2)O_(2) and catalysts and limit the activity of the electrocatalysts in battery reactions,leading to inadequate electrolytic efficiency.Herein,in-situ doping of Li_(2)O_(2) by select metal ions is found to significantly enhance the lithium-air battery performance,and Co^(2+)stands out as the most effective dopant among the series.This is ascribed to the unique catalytic activity of the resulting Co-O_(x) sites towards oxygen electrocatalysis,rendering the lithium-air battery self-catalytically active.Theoretical studies based on density functional theory calculations show that structural compression occurs upon Co^(2+)doping,which lowers the energy barrier of Li_(2)O_(2) decomposition.Results from this study highlight the significance of in situ electrochemical doping of the discharge product in enhancing the performance of lithium-air battery. 展开更多
关键词 Co^(2+)-doped Li_(2)O_(2) density functional theory in situ electrochemical doping lithium-air battery self-catalysis
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Bulk preparation of free-standing single-iron-atom catalysts directly as the air electrodes for high-performance zinc-air batteries 被引量:2
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作者 Hong-Bo Zhang Yu Meng +11 位作者 Hong Zhong Lili Zhang Shichao Ding Lingzhe Fang Tao Li Yi Mei Peng-Xiang Hou Chang Liu Scott P.Beckman Yuehe Lin Hui-Ming Cheng Jin-Cheng Li 《Carbon Energy》 SCIE CSCD 2023年第5期57-66,共10页
The keen interest in fuel cells and metal-air batteries stimulates a great deal of research on the development of a cost-efficient and high-performance catalyst as an alternative to traditional Pt to boost the sluggis... The keen interest in fuel cells and metal-air batteries stimulates a great deal of research on the development of a cost-efficient and high-performance catalyst as an alternative to traditional Pt to boost the sluggish oxygen reduction reaction(ORR)at the cathode.Herein,we report a facile and scalable strategy for the large-scale preparation of a free-standing and flexible porous atomically dispersed Fe-N-doped carbon microtube(FeSAC/PCMT)sponge.Benefiting from its unique structure that greatly facilitates the catalytic kinetics,mass transport,and electron transfer,our FeSAC/PCMT electrode exhibits excellent performance with an ORR potential of 0.942 V at^(-3) mA cm^(-2).When the FeSAC/PCMT sponge was directly used as an oxygen electrode for liquid-state and flexible solid-state zinc-air batteries,high peak power densities of 183.1 and 58.0 mW cm^(-2) were respectively achieved,better than its powdery counterpart and commercial Pt/C catalyst.Experimental and theoretical investigation results demonstrate that such ultrahigh ORR performance can be attributed to atomically dispersed Fe-N_(5) species in FeSAC/PCMT.This study presents a cost-effective and scalable strategy for the fabrication of highly efficient and flexible oxygen electrodes,provides a significant new insight into the catalytic mechanisms,and helps to realize significant advances in energy devices. 展开更多
关键词 atomic Fe-N_(5)species free-standing electrode large-scale preparation oxygen reduction reaction zinc-air battery
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Nutritional, Textural, Sensory Properties and Storage Stability Evaluation of Newly Formulated Strawberry Bar
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作者 Nargis Akter Md. Sajib Al Reza +5 位作者 Md. Esrafil Md. Al Amin Sonyia Akter Neaz Morshed Reza Md. Nazmul Huda Nasim Pratima Roy Dina 《Food and Nutrition Sciences》 CAS 2023年第4期287-299,共13页
An analytical study was conducted to develop a strawberry bar and analysis of the nutritional quality and storage stability of a newly formulated strawberry bar. In proximate analysis moisture, ash, pH, acidity, vitam... An analytical study was conducted to develop a strawberry bar and analysis of the nutritional quality and storage stability of a newly formulated strawberry bar. In proximate analysis moisture, ash, pH, acidity, vitamin C, total phenolic content, and antioxidant of strawberry pulp were found 82%, 0.5%, 2.57, 1.38%, 49 mg/100g, 0.33%, 75.17% whereas, in the strawberry bar, it was found 18%, 0.71%, 2.10, 1.10%, 22 mg/100g, 0.14%, 56.13% respectively. For textural properties analysis, the textural profile of the strawberry bar such as hardness, factorability, viscosity, cohesiveness, adhesiveness, springiness, gumminess, chewiness, probe diameter, threshold, filtering range of strawberry bar was found 5.538 × 10<sup>4</sup> N/m, 0.000 N/m<sup>2</sup>, 1.687 × 10<sup>4</sup> N/m<sup>2</sup>, 0.6636, 2.908 × 10<sup>3</sup> J/m<sup>3</sup>, 0.8664, 3.675 × 10<sup>4</sup> N/m<sup>2</sup>, 3.184 × 10<sup>4</sup> N/m<sup>2</sup>, 20.000 mm, 5 N, 0.4 N respectively whereas the maximum level was 17.4 N at 29.628 seconds and the minimum level was -5.3 N at 30.166 seconds. The sensory evaluation of the strawberry bar was conducted based on nine-point hedonic scales. The sensory evaluation results indicated that the appearance of the strawberry bar was liked very much and the taste, texture, color, aroma, and overall acceptability of the strawberry bar were liked moderately by panelists. In microbiological analysis, the Total Viable Count (TVC) and Total Coliform Count (TCC) of the strawberry bar were found safe levels for up to third days. But on the sixth day, the TCC of the strawberry bar was not found and the TVC of the strawberry bar was found 17 × 10<sup>4</sup> cfu/g respectively which is higher than the permitted value (Gulf Standard: 10<sup>5</sup> cfu/g). From the microbial point of view, the newly formulated strawberry bar was safe to consume for up to 3 days but not for 6 days. 展开更多
关键词 Strawberry Pulp Strawberry Bar ANTIOXIDANT Sensory Evaluation Texture Gallic Acid
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Phytochemicals, polyphenols content, in vitro antioxidant and antibacterial activities of Albizia coriaria Welw ex. Oliver flowers
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作者 Timothy Omara Ambrose K.Kiprop Viola J.Kosgei 《Traditional Medicine Research》 2023年第2期1-6,共6页
Albizia coriaria Welw ex.Oliver(hereafter A.coriaria)is a revered medicinal tree whose organs are used by indigenous African societies for managing various ailments.Herein,we assessed the secondary metabolites,total p... Albizia coriaria Welw ex.Oliver(hereafter A.coriaria)is a revered medicinal tree whose organs are used by indigenous African societies for managing various ailments.Herein,we assessed the secondary metabolites,total polyphenolics,free radical scavenging and antimicrobial activities of A.coriaria flowers.The dry powdered sample was extracted serially with ethyl acetate,ethanol and distilled water.Results of classical phytochemical screening showed that saponins,phenols,alkaloids,flavonoids,tannins and terpenes were the dominant phytochemicals.The highest total polyphenolic content(10.37±0.02 mg QE/g DW and 72.09±0.09 mg GAE/g DW)and free radical scavenging potential(IC50=24.23±0.04 mg/mL)were for the ethyl acetate extract.It also had a higher bacteriostatic activity than the ethanolic extract against Pseudomonas aeruginosa,Salmonella typhi,Escherichia coli and Staphylococcus aureus with diameters of inhibition ranging from 7.00±0.00 to 22.00±1.73 mm.The aqueous extract showed no appreciable antibacterial effect on the tested microorganisms.This is the first report which support the use of floral extracts of this species in the management of ailments in African traditional medicine. 展开更多
关键词 BACTERIOSTATIC Albizia coriaria DPPH assay traditional medicine oxidative stress
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Potential Risks to the Environment as a Result of Pesticide Handling in the Nanumba-North Municipality, Ghana
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作者 Fusheini Yakubu Kenneth B. Pelig-Ba +1 位作者 Samson A. Abagale Lateef Adebayo Oseni 《Journal of Agricultural Chemistry and Environment》 CAS 2023年第2期65-83,共19页
The present study deduced the potential risks to the environment as a result of pesticide handling in the Nanumba-North Municipality of the Northern Region of Ghana. Cluster sampling was used to select 30 communities ... The present study deduced the potential risks to the environment as a result of pesticide handling in the Nanumba-North Municipality of the Northern Region of Ghana. Cluster sampling was used to select 30 communities from Nanumba-North Municipality. Simple random sampling and purposive sampling were used respectively to select 7 households from each community and one farmer from each household, giving a sample size of 210 farmers. The instrument used for the study was a questionnaire of respondents. The quantitative data obtained were analyzed using frequencies and percentages. The study concluded that 11 types of pesticides are commonly used by the farmers on their fields, with atrazine (22%) being the most commonly used pesticide which is an herbicide, and deltamethrin (1%) was the least used pesticide which is an insecticide. The study, therefore, recommends that appropriate authorities in the area should inculcate means to enlighten farmers on the best way of pesticide utilization that can beef up the ambition of sustainable agricultural production and desirable environmental conditions. 展开更多
关键词 PESTICIDE Risk Nanumba-North Municipality Environment
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Synthesis and Characterization of Gadolinium Oxide-Hematite Magnetic Ceramic Nanostructures
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作者 Sarah Glasser Andrew J. Craig +3 位作者 Felicia Tolea Mihaela Sofronie Jennifer A. Aitken Monica Sorescu 《Journal of Minerals and Materials Characterization and Engineering》 CAS 2023年第1期1-15,共15页
Mixed-oxide nanostructures of the type xGd<sub>2</sub>O<sub>3</sub>-(1-x)α-Fe<sub>2</sub>O<sub>3</sub> (x=0.1, 0.3, 0.5 and 0.7) were synthesized by mechanochemical act... Mixed-oxide nanostructures of the type xGd<sub>2</sub>O<sub>3</sub>-(1-x)α-Fe<sub>2</sub>O<sub>3</sub> (x=0.1, 0.3, 0.5 and 0.7) were synthesized by mechanochemical activation for ball milling times of 0, 2, 4, 8 and 12 hours. The systems were subsequently analyzed by M&#1255;ssbauer spectroscopy, X-ray powder diffraction (XRPD), magnetic measurements and optical diffuse reflectance spectroscopy. The magnetic hyperfine field was studied as function of ball milling time for all sextets involved and found to be consistent with the formation of a limited solid solution in the systems investigated. The end-product was the gadolinium perovskite, represented by a doublet whose abundance was derived as function of the milling time. The XRPD patterns recorded for the equimolar composition were dominated by the diffraction peaks of GdFeO<sub>3</sub> after 12 hours of milling. The hysteresis loops were recorded at 300 and 5 K in an applied magnetic field of 5 T and were interpreted as a superposition of paramagnetic behavior of gadolinium oxide and weak ferromagnetic behavior of hematite and gadolinium perovskite. The Morin transition of hematite was inferred from zero-field-cooling-field-cooling (ZFC-FC) curves measured with a magnetic field of 200 Oe in the 5-300 K temperature range and was found to depend on the ball milling time. Optical diffuse reflectance spectra showed that the compounds were semiconductors with an optical band gap of 2.1 eV. 展开更多
关键词 Gadolinium Oxide HEMATITE Mӧssbauer Spectroscopy Magnetic Properties Optical Properties
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Exploring Chemovar-Specific Cannabis Extracts Quantification and Evaluation of Cytotoxic Compounds for Targeting Glioblastoma Multiforme
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作者 Ashraf Duzan Mufeed Basti +2 位作者 Travis Cesarone Waldemar Debinski Daniel Todd 《Journal of Biosciences and Medicines》 2023年第8期192-207,共16页
Glioblastoma Multiforme (GBM) represents one of the most aggressive and metastatic brain tumors, with a dismal success rate of less than three percent after five years, particularly in tumors with active immune checkp... Glioblastoma Multiforme (GBM) represents one of the most aggressive and metastatic brain tumors, with a dismal success rate of less than three percent after five years, particularly in tumors with active immune checkpoints. This necessitates the development of targeted endogenous agents for precise GBM treatment. Previous experiments utilizing Chemovar Specific Cannabis Extractions (CSCEs), fractionated with polar solvents and quantified using Liquid and Gas Column Chromatography combined with Mass Spectrometry (LC/GCMS), have shown reduced viability and motility in human GBM cell lines. However, the complexity of the botanical substance has hindered the personalization of standard cannabis medicines for GBM due to unknown synergistic effects of multiple compounds. To address this limitation, our study focuses on exposing AM251 cells to chemovar fractions extracted using a non-polar solvent, thereby isolating a broader spectrum of constituents. By employing LC/GCMS in conjunction with Nuclear Magnetic Resonance (NMR), we have identified and quantified nine* compounds present in the non-polar CSCE that exhibit significant efficacy (0.1 μM) in inducing cytotoxicity* in GBM tumor cells. Conversely, the polar fraction in our experiment did not demonstrate efficacy against UM251 cells. The quantification of individual compounds within a cannabis extraction that selectively induces cell death in brain tumors holds promise for guiding future research and facilitating the development of a standardized CSCE for GBM therapy. 展开更多
关键词 CANNABINOIDS Liquid Chromatography Mass Spectrometry (LC-MS) Glioblastoma Multiforme (GBM) Total Correlation Spectroscopy (TOCSY) Gas Chromatography-Mass Spectrometry (GC-MS)
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Health Impacts and Mechanisms of Per- and Polyfluoroalkyl Substances (PFAS) from Epidemiological to Toxicological
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作者 Godspower Oghenemaroh Sebe Ebuka Victor Anyaogu +2 位作者 Adeyemo David Adebowale Raymond Chidozie Ntomchukwu Supreme O. Oghenerhoro Ogbole E. Jonathan 《Journal of Biosciences and Medicines》 2023年第12期218-240,共20页
This research provides a comprehensive analysis of the health impacts of Per- and Polyfluoroalkyl Substances (PFAS) through an integration of epidemiological and toxicological studies. The study identifies significant... This research provides a comprehensive analysis of the health impacts of Per- and Polyfluoroalkyl Substances (PFAS) through an integration of epidemiological and toxicological studies. The study identifies significant correlations between PFAS exposure and adverse health outcomes, including thyroid dysfunction, elevated cholesterol levels, and increased risk of specific cancers. Utilizing a mixed-methods approach, the research combines a systematic review and meta-analysis of recent literature with in vitro and in vivo toxicological experiments. The epidemiological analysis reveals increased risks of thyroid dysfunction, cholesterol elevation, and certain cancers among PFAS-exposed individuals. Toxicological findings further corroborate these results, showing dose-dependent cytotoxic effects in human cell lines and endocrine disruption in rodent models. The study emphasizes the importance of regulatory measures to mitigate PFAS exposure and the urgent need for more comprehensive research into their long-term effects. The integration of epidemiological and toxicological data underscores the significant health risks posed by PFAS, highlighting the necessity of immediate action to limit exposure and develop safer alternatives. 展开更多
关键词 PFAS Public Health EPIDEMIOLOGY TOXICOLOGY Endocrine Disruption CARCINOGENICITY Environmental Policy Chemical
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Understanding the Perceptions and Practices of Homeowners in the Event of Hurricane: A Case Study of University Employees in Louisiana
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作者 Oluwafemi Awolesi Natalie Matherne +3 位作者 Victoria Horton Mattie Prosser Peter Oni Odunayo Lawal 《Journal of Geoscience and Environment Protection》 2023年第5期226-242,共17页
The purpose of this qualitative study is to explore and gain an understanding of Louisiana homeowners’ perceptions and practices in preparing for hurricanes;contribute to academic research and student learning, while... The purpose of this qualitative study is to explore and gain an understanding of Louisiana homeowners’ perceptions and practices in preparing for hurricanes;contribute to academic research and student learning, while guiding the development of future projects. We focused specifically on how homeowners in Louisiana would protect their important documents and possessions. These documents and possessions include but are not limited to photographs, social security cards, birth certificates, and insurance paperwork. We collected the data throughout the fall semester of 2022 at Louisiana State University (LSU) by conducting a focus group and in-depth interviews. We collected a variety of answers, but most participants expressed a strong need to have their important documents and possessions protected and gave different strategies for how this was carried out, such as digitizing or protective storage. Participants also expressed a strong need for more information to be delivered to residents to talk more about ways they can protect their own documents and possessions. Emphases were also made on the need for: leaders of large institutions to be especially concerned with preparedness for vulnerable populations;outreach programs to be put in place to spread awareness of the importance of protecting important documents and possessions during a disaster;news outlets to switch their focus from normal survival tips to discussions on the importance of protecting documents and possessions;government and non-profit agencies to work together to share tips and information through social media and other forms of handouts. 展开更多
关键词 Hurricanes Disaster Preparedness Environmental Education Climate Change
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Inflammasome links traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease
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作者 Gabriela Seplovich Yazan Bouchi +8 位作者 Juan Pablo de Rivero Vaccari Jennifer C.Munoz Pareja Andrew Reisner Laura Blackwell Yehia Mechref Kevin K.Wang J.Adrian Tyndall Binu Tharakan Firas Kobeissy 《Neural Regeneration Research》 SCIE CAS 2025年第6期1644-1664,共21页
Traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease are three distinct neurological disorders that share common pathophysiological mechanisms involving neuroinflammation. One sequela ... Traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease are three distinct neurological disorders that share common pathophysiological mechanisms involving neuroinflammation. One sequela of neuroinflammation includes the pathologic hyperphosphorylation of tau protein, an endogenous microtubule-associated protein that protects the integrity of neuronal cytoskeletons. Tau hyperphosphorylation results in protein misfolding and subsequent accumulation of tau tangles forming neurotoxic aggregates. These misfolded proteins are characteristic of traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease and can lead to downstream neuroinflammatory processes, including assembly and activation of the inflammasome complex. Inflammasomes refer to a family of multimeric protein units that, upon activation, release a cascade of signaling molecules resulting in caspase-induced cell death and inflammation mediated by the release of interleukin-1β cytokine. One specific inflammasome, the NOD-like receptor protein 3, has been proposed to be a key regulator of tau phosphorylation where it has been shown that prolonged NOD-like receptor protein 3 activation acts as a causal factor in pathological tau accumulation and spreading. This review begins by describing the epidemiology and pathophysiology of traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease. Next, we highlight neuroinflammation as an overriding theme and discuss the role of the NOD-like receptor protein 3 inflammasome in the formation of tau deposits and how such tauopathic entities spread throughout the brain. We then propose a novel framework linking traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease as inflammasomedependent pathologies that exist along a temporal continuum. Finally, we discuss potential therapeutic targets that may intercept this pathway and ultimately minimize long-term neurological decline. 展开更多
关键词 Alzheimer's disease caspase-1 chronic traumatic encephalopathy INFLAMMASOMES NEURODEGENERATION neuroinflammation NLRP1 NLRP3 PYROPTOSIS TAUOPATHY traumatic brain injury
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Unraveling the Rheology of Nanocellulose Aqueous Suspensions:A Comprehensive Study on Biomass-Derived Nanofibrillated Cellulose
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作者 Mingyue Miao Fei Wang +6 位作者 Qing Li Longchen Tao Chenchen Dai Yu Liu Shujuan Han Wenshuai Chen Ping Lu 《Journal of Renewable Materials》 EI CAS 2024年第3期443-455,共13页
The rheological properties of nanocellulose aqueous suspensions play a critical role in the development of nanocellulose-based bulk materials.High-crystalline,high-aspect ratio,and slender nanofibrillated cellulose(NF... The rheological properties of nanocellulose aqueous suspensions play a critical role in the development of nanocellulose-based bulk materials.High-crystalline,high-aspect ratio,and slender nanofibrillated cellulose(NFC)were extracted from four biomass resources.The cellulose nanofibrils and nanofibril bundles formed inter-connected networks in the NFC aqueous suspensions.The storage moduli of the suspensions with different concentrations were higher than their corresponding loss moduli.As the concentration increased,the storage and loss modulus of NFC dispersion increased.When the shear rate increased to a certain value,there were differences in the changing trend of the rheological behavior of NFC aqueous suspensions derived from different biomass resources and the suspensions with different solid concentrations.NFC dispersion’s storage and loss modulus increased when the temperature rose to nearly 80℃.We hope this study can deepen the understanding of the rheological properties of NFC colloids derived from different biomass resources. 展开更多
关键词 Biomass resources nanofibrillated cellulose high-pressure homogenizer SUSPENSION rheology properties
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Recent advances and future therapy development for Alzheimer’s disease and related disorders
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作者 Megan Hong Gal Bitan 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第9期1877-1878,共2页
Over 55 million people globally live with Alzheimer’s disease(AD)or related dementias(ADRD)and the number is expected to double every twenty years.Unt i l recent l y,onl y symptomatic treatments were available to pat... Over 55 million people globally live with Alzheimer’s disease(AD)or related dementias(ADRD)and the number is expected to double every twenty years.Unt i l recent l y,onl y symptomatic treatments were available to patients with AD,including acetylcholine esterase inhibitors,of which the last one,galantamine,was approved by the US Food and Drug Administration(FDA)in 2001. 展开更多
关键词 ALZHEIMER globally patients
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Mo_(2)P Monolayer as a Superior Electrocatalyst for Urea Synthesis from Nitrogen and Carbon Dioxide Fixation:A Computational Study
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作者 Dongxu Jiao Zhongxu Wang +4 位作者 Yuejie Liu Qinghai Cai Jingxiang Zhao Carlos R.Cabrera Zhongfang Chen 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第1期207-214,共8页
Urea synthesis through the simultaneous electrocatalytic reduction of N_(2)and CO_(2)molecules under ambient conditions holds great promises as a sustainable alternative to its industrial production,in which the devel... Urea synthesis through the simultaneous electrocatalytic reduction of N_(2)and CO_(2)molecules under ambient conditions holds great promises as a sustainable alternative to its industrial production,in which the development of stable,highly efficient,and highly selective catalysts to boost the chemisorption,activation,and coupling of inert N_(2)and CO_(2)molecules remains rather challenging.Herein,by means of density functional theory computations,we proposed a new class of two-dimensional nanomaterials,namely,transition-metal phosphide monolayers(TM_(2)P,TM=Ti,Fe,Zr,Mo,and W),as the potential electrocatalysts for urea production.Our results showed that these TM_(2)P materials exhibit outstanding stability and excellent metallic properties.Interestingly,the Mo_(2)P monolayer was screened out as the best catalyst for urea synthesis due to its small kinetic energy barrier(0.35 eV)for C-N coupling,low limiting potential(-0.39 V),and significant suppressing effects on the competing side reactions.The outstanding catalytic activity of the Mo_(2)P monolayer can be ascribed to its optimal adsorption strength with the key^(*)NCON species due to its moderate positive charges on the Mo active sites.Our findings not only propose a novel catalyst with high-efficiency and high-selectivity for urea production but also further widen the potential applications of metal phosphides in electrocatalysis. 展开更多
关键词 C-N coupling density functional theory Mo_(2)P monolayer urea synthesis
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Recombinant vaccines:Current updates and future prospects
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作者 Vivek Kumar Anuj Verma +5 位作者 Riddhi Singh Priyanshi Garg Santosh Kumar Sharma Himanshu Narayan Singh Santosh Kumar Mishra Sanjay Kumar 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2024年第8期338-350,共13页
Recombinant technology-based vaccines have emerged as a highly effective way to prevent a wide range of illnesses.The technology improved vaccine manufacturing,rendering it more efficient and economical.These vaccines... Recombinant technology-based vaccines have emerged as a highly effective way to prevent a wide range of illnesses.The technology improved vaccine manufacturing,rendering it more efficient and economical.These vaccines have multiple advantages compared to conventional vaccines.The pandemic has heightened awareness of the advantages of these vaccine technologies;trust and acceptance of these vaccines are steadily growing globally.This work offers an overview of the prospects and advantages associated with recombinant vaccines.Additionally,it discusses some of the challenges likely to arise in the future.Their ability to target diverse pathogen classes underscores their contributions to preventing previously untreatable diseases(especially vector-borne and emerging diseases)and hurdles faced throughout the vaccine development process,especially in enhancing the effectiveness of these vaccines.Moreover,their compatibility with emerging vaccination platforms of the future like virus-like particles and CRISPR/Cas9 for the production of next-generation vaccines may offer many prospects.This review also reviewed the hurdles faced throughout the vaccine development process,especially in enhancing the effectiveness of these vaccines against vector-borne diseases,emerging diseases,and untreatable diseases with high mortality rates like AIDS as well as cancer. 展开更多
关键词 MALARIA DENGUE Emerging diseases IMMUNOINFORMATICS Virus-like particles CRISPR-Cas9
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Himalayas as a global hot spot of springtime stratospheric intrusions:Insight from isotopic signatures in sulfate aerosols
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作者 Kun Wang ShiChang Kang +9 位作者 Mang Lin PengFei Chen ChaoLiu Li XiuFeng Yin Shohei Hattori Teresa L.Jackson JunHua Yang YiXi Liu Naohiro Yoshida Mark HThiemens 《Research in Cold and Arid Regions》 CSCD 2024年第1期5-13,共9页
Downward transport of stratospheric air into the troposphere(identified as stratospheric intrusions)could potentially modify the radiation budget and chemical of the Earth's surface atmosphere.As the highest and l... Downward transport of stratospheric air into the troposphere(identified as stratospheric intrusions)could potentially modify the radiation budget and chemical of the Earth's surface atmosphere.As the highest and largest plateau on earth,the Tibetan Plateau including the Himalayas couples to global climate,and has attracted widespread attention due to rapid warming and cryospheric shrinking.Previous studies recognized strong stratospheric intrusions in the Himalayas but are poorly understood due to limited direct evidences and the complexity of the meteorological dynamics of the third pole.Cosmogenic^(35)S is a radioactive isotope predominately produced in the lower stratosphere and has been demonstrated as a sensitive chemical tracer to detect stratospherically sourced air mass in the planetary boundary layer.Here,we report 6-month(April–September 2018)observation of^(35)S in atmospheric sulfate aerosols(^(35)SO_(4)^(2-))collected from a remote site in the Himalayas to reveal the stratospheric intrusion phenomenon as well as its potential impacts in this region.Throughout the sampling campaign,the^(35)SO_(4)^(2-)concentrations show an average of 1,070±980 atoms/m^(3).In springtime,the average is 1,620±730 atoms/m^(3),significantly higher than the global existing data measured so far.The significant enrichments of^(35)SO_(4)^(2-)measured in this study verified the hypothesis that the Himalayas is a global hot spot of stratospheric intrusions,especially during the springtime as a consequence of its unique geology and atmospheric couplings.In combined with the ancillary evidences,e.g.,oxygen-17 anomaly in sulfate and modeling results,we found that the stratospheric intrusions have a profound impact on the surface ozone concentrations over the study region,and potentially have the ability to constrain how the mechanisms of sulfate oxidation are affected by a change in plateau atmospheric properties and conditions.This study provides new observational constraints on stratospheric intrusions in the Himalayas,which would further provide additional information for a deeper understanding on the environment and climatic changes over the Tibetan Plateau. 展开更多
关键词 HIMALAYAS Stratospheric intrusions Cosmogenic^(35)SO_(4)^(2-) Ozone Atmospheric oxidation
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Elucidating the molecular basis of ATP-induced cell death in breast cancer: Construction of a robust prognostic model
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作者 Hao-Ling Zhang Sandai Doblin +11 位作者 Zhong-Wen Zhang Zhi-Jing Song Babu Dinesh Yasser Tabana DahhamSabbar Saad Mowaffaq Adam Ahmed Adam Yong Wang Wei Wang Hao-Long Zhang Sen Wu Rui Zhao Barakat Khaled 《World Journal of Clinical Oncology》 2024年第2期208-242,共35页
BACKGROUND Breast cancer is a multifaceted and formidable disease with profound public health implications.Cell demise mechanisms play a pivotal role in breast cancer pathogenesis,with ATP-triggered cell death attract... BACKGROUND Breast cancer is a multifaceted and formidable disease with profound public health implications.Cell demise mechanisms play a pivotal role in breast cancer pathogenesis,with ATP-triggered cell death attracting mounting interest for its unique specificity and potential therapeutic pertinence.AIM To investigate the impact of ATP-induced cell death(AICD)on breast cancer,enhancing our understanding of its mechanism.METHODS The foundational genes orchestrating AICD mechanisms were extracted from the literature,underpinning the establishment of a prognostic model.Simultaneously,a microRNA(miRNA)prognostic model was constructed that mirrored the gene-based prognostic model.Distinctions between high-and low-risk cohorts within mRNA and miRNA characteristic models were scrutinized,with the aim of delineating common influence mechanisms,substantiated through enrichment analysis and immune infiltration assessment.RESULTS The mRNA prognostic model in this study encompassed four specific mRNAs:P2X purinoceptor 4,pannexin 1,caspase 7,and cyclin 2.The miRNA prognostic model integrated four pivotal miRNAs:hsa-miR-615-3p,hsa-miR-519b-3p,hsa-miR-342-3p,and hsa-miR-324-3p.B cells,CD4+T cells,CD8+T cells,endothelial cells,and macrophages exhibited inverse correlations with risk scores across all breast cancer subtypes.Furthermore,Kyoto Encyclopedia of Genes and Genomes analysis revealed that genes differentially expressed in response to mRNA risk scores significantly enriched 25 signaling pathways,while miRNA risk scores significantly enriched 29 signaling pathways,with 16 pathways being jointly enriched.CONCLUSION Of paramount significance,distinct mRNA and miRNA signature models were devised tailored to AICD,both potentially autonomous prognostic factors.This study's elucidation of the molecular underpinnings of AICD in breast cancer enhances the arsenal of potential therapeutic tools,offering an unparalleled window for innovative interventions.Essentially,this paper reveals the hitherto enigmatic link between AICD and breast cancer,potentially leading to revolutionary progress in personalized oncology. 展开更多
关键词 ATP-induced cell death MRNA MIRNA Prognostic model Breast cancer
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Effects of Effluent from a Dumpsite on the Physicochemical Properties of River Achichum in Bamendakwe, Northwest Cameroon
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作者 Mofor Nelson Alakeh Keuwo Tiayong Francois +2 位作者 Nchofua Festus Biosengazeh Mikwa Cyprian Chunkang Njoyim Estella Buleng Tamungang 《Journal of Environmental Protection》 2024年第9期934-947,共14页
This study was aimed to assess the effects of effluent from a dumpsite on the physicochemical properties of river Achichum in Bamendakwe in the Bamenda I municipality, Northwest Region of Cameroon. The quality of wate... This study was aimed to assess the effects of effluent from a dumpsite on the physicochemical properties of river Achichum in Bamendakwe in the Bamenda I municipality, Northwest Region of Cameroon. The quality of water used for domestic purposes by the population of this area is mostly appreciated through its organoleptic assessment while no attention is paid to the physicochemical and microbiological properties. Samples (upstream, effluent, and downstream) were collected in the months of September 2022 and February 2023 and examined for organoleptic, physicochemical and bacteriological characteristics using standard methods. The river was contaminated to different extents by nitrates (28.56 - 149.91 mg/L), sulphates (246.89 - 725.42 mg/L) and heavy metals (0.01 - 0.04 mg/L for lead and 0.98 - 2.15 mg/L for aluminum). This contamination could be due to an inflow of the untreated effluent into the river. The river contained a high pollution level of lead and aluminum. Bacteriological investigations revealed that all the analyzed samples from the river contained indicators of faecal pollution such as Enterobacteria spp., E. coli, Streptococcus spp., Salmonella spp., Shigella spp., Staphylococcus spp. and Vibrio spp. Consequently, its utilization exposes consumers to health risks. Thus, water from the river should be treated prior to consumption. 展开更多
关键词 EFFLUENT UPSTREAM DOWNSTREAM Water Quality Faecal Contamination Bamendakwe
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