keyword
https://read.qxmd.com/read/38446005/an-ultra-low-modulus-of-ductile-tizrhfta-biomedical-high-entropy-alloys-through-deformation-induced-martensitic-transformation-twinning-amorphization
#21
JOURNAL ARTICLE
Bingnan Qian, Xiaoqing Li, Yu Wang, Junhua Hou, Jikui Liu, Sihao Zou, Fengchao An, Wenjun Lu
Biomedical alloys are paramount materials in biomedical applications, particularly in crafting biological artificial replacements. In traditional biomedical alloys, a significant challenge is simultaneously achieving an ultra-low Young's modulus, excellent biocompatibility, and acceptable ductility. A multi-component body-centered cubic biomedical high-entropy alloy (Bio-HEA), which is composed of non-toxic elements, is noteworthy for its outstanding biocompatibility and compositional tuning capabilities. Nevertheless, the aforementioned challenges still remain...
March 6, 2024: Advanced Materials
https://read.qxmd.com/read/38435549/non-redundant-implicational-base-of-formal-context-with-constraints-using-sat
#22
JOURNAL ARTICLE
Taufiq Hidayat, Asmala Ahmad, Hea Choon Ngo
An implicational base is knowledge extracted from a formal context. The implicational base of a formal context consists of attribute implications which are sound, complete, and non-redundant regarding to the formal context. Non-redundant means that each attribute implication in the implication base cannot be inferred from the others. However, sometimes some attribute implications in the implication base can be inferred from the others together with a prior knowledge. Regarding knowledge discovery, such attribute implications should be not considered as new knowledge and ignored from the implicational base...
2024: PeerJ. Computer Science
https://read.qxmd.com/read/38435303/dysbiosis-of-the-gut-microbiota-and-its-effect-on-%C3%AE-synuclein-and-prion-protein-misfolding-consequences-for-neurodegeneration
#23
REVIEW
Nasir Uddin Mahbub, Md Minarul Islam, Seong-Tshool Hong, Hea-Jong Chung
Abnormal behavior of α-synuclein and prion proteins is the hallmark of Parkinson's disease (PD) and prion illnesses, respectively, being complex neurological disorders. A primary cause of protein aggregation, brain injury, and cognitive loss in prion illnesses is the misfolding of normal cellular prion proteins (PrPC ) into an infectious form (PrPSc ). Aggregation of α-synuclein causes disruptions in cellular processes in Parkinson's disease (PD), leading to loss of dopamine-producing neurons and motor symptoms...
2024: Frontiers in Cellular and Infection Microbiology
https://read.qxmd.com/read/38431656/investigation-of-surface-hardness-thermostability-tribo-corrosion-and-microstructural-morphological-properties-of-microwave-synthesized-high-entropy-alloy-feconimncu-coating-claddings-on-steel
#24
JOURNAL ARTICLE
Shubham Sharma, Shashi Prakash Dwivedi, Kahtan A Mohammed, Abhinav Kumar, Fuad A Awwad, M Ijaz Khan, Emad A A Ismail
Deposition of high entropy alloy FeCoNiMnCu on SS-304 was carried out by microwave energy for application in "solid oxide fuel-cell (SOFC) interconnects". The ball-milling has been performed by taking "Fe, Co, Ni, Mn, and Cu" in equal 20 wt. % of before deposited on SS-304 substrate. The deposited steel with 20% Fe 20% Co 20% Ni 20% Mn 20% Cu high entropy alloy (HEA) was exposed to thermal-exposure in the air for up to 10 weeks at 800 °C. The uniform cladding distribution of 20% Fe 20% Co 20% Ni 20% Mn 20% Cu HEA particles can be apparently observed on SS-304 substrate by utilizing Scanning Electron Microscope (SEM), and Optical microscopy analysis...
March 2, 2024: Scientific Reports
https://read.qxmd.com/read/38431422/self-healing-environmentally-stable-and-adhesive-hydrogel-sensor-with-conductive-cellulose-nanocrystals-for-motion-monitoring-and-character-recognition
#25
JOURNAL ARTICLE
Yafang Wang, Anrong Yao, Baojie Dou, Cuimin Huang, Lin Yang, Juan Liang, Jianwu Lan, Shaojian Lin
Conductive hydrogel-based sensors offer diverse applications in artificial intelligence, wearable electronic devices and character recognition management. However, it remains a significant challenge to maintain their satisfactory performances under extreme climatic conditions. Herein, a stretchable, self-adhesive, self-healing and environmentally stable conductive hydrogel was developed through free radical polymerization of hydroxyethyl acrylate (HEA) and poly(ethylene glycol) methacrylate (PEG) as the skeleton, followed by the incorporation of polyaniline-coated cellulose nanocrystal (CNC@PANI) as the conductive and reinforced nanofiller...
May 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38419800/electrochemical-and-hot-corrosion-behaviour-of-steel-reinforced-with-alsibetiv-high-entropy-alloy-using-friction-stir-processing
#26
JOURNAL ARTICLE
Ragunath Sundaram, Radhika Nachimuthu, Aravind Krishna Sivanandam, Jeyaprakash Natarajan
A lightweight AlSiBeTiV high entropy alloy (HEA) powder is synthesized by the ball milling process and is reinforced on SS410 through friction stir processing (FSP). Subsequently, the annealing process is conducted on the processed samples at 450, 600, and 750°C for 120 mins. The grains are refined at 600°C by 23.3% than the processed HEA sample. A higher microhardness of 672 HV is attained on the processed HEA sample annealed at 600°C due to the synergistic effect of FSP and annealing through refined grains...
2024: Science and Technology of Advanced Materials
https://read.qxmd.com/read/38413039/the-curative-efficacy-of-auricular-comprehensive-therapy-on-menstrual-migraine-and-its-effect-on-serum-prostaglandin
#27
JOURNAL ARTICLE
Guo-Liang Shao, Shao-Lei Huang, Rui Li, Dian-Hui Yang, Meng-Meng Wang
OBJECTIVES: To observe the curative efficacy of auricular comprehensive therapy on menstrual migraine(MM) and its effect on serum prostaglandin F2α(PGF2α ), prostaglandin E2(PGE2 ) contents and ratio, so as to explore its possible mechanism. METHODS: A total of 66 patients with MM of liver-fire syndrome were randomly divided into observation group (33 cases, 2 cases dropped off) and control group (33 cases, 2 cases dropped off), and 20 healthy women were included in the normal group...
February 25, 2024: Zhen Ci Yan Jiu, Acupuncture Research
https://read.qxmd.com/read/38401862/graphitic-carbon-nitride-hydrophilicity-dependent-photocatalytic-degradation-of-antibiotics-with-different-log-k-ow
#28
JOURNAL ARTICLE
Jong-Min Lee, Youn-Jun Lee, Yoo Jae Jeong, In Sun Cho, Eun Hea Jho, Seong-Jik Park, Chang-Gu Lee
The surface hydrophilicity of a photocatalyst is an important factor that directly influences its interactions with organic pollutants and significantly impacts its degradation. In this study, we investigated the impact of increased hydrophilicity of g-C3 N4 (CN) by alkaline solvothermal treatment on the degradations of three antibiotics (oxytetracycline (OTC), oxolinic acid (OA), and sulfamethoxazole (SMX)) with different log Kow values. Scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), and Fourier-transform infrared (FT-IR) spectroscopy showed no significant differences in the morphology, crystalline structure, and surface functional groups of CN after alkaline solvothermal treatment (Nv-HPCN)...
February 22, 2024: Chemosphere
https://read.qxmd.com/read/38399845/study-of-synthesis-of-dual-curing-thermoplastic-polyurethane-hot-melt-adhesive-and-optimization-by-using-gray-relational-analysis-to-apply-in-fabric-industry-to-solve-seamless-bonding-issues
#29
JOURNAL ARTICLE
Sheng-Yu Lin, Naveed Ahmad, Chung-Feng Jeffrey Kuo
People wear clothes for warmth, survival and necessity in modern life, but in the modern era, eco-friendliness, shortened production times, design and intelligence also matter. To determine the relationship between data series and verify the proximity of each data series, a gray relational analysis, or GRA, is applied to textiles, where seamless bonding technology enhances the bond between components. In this study, a polyurethane prepolymer, 2-hydroxyethyl acrylate (2-HEA) as an end-capping agent and n-octyl acrylate (ODA) as a photoinitiator were used to synthesize a dual-curing polyurethane hot-melt adhesive...
February 7, 2024: Polymers
https://read.qxmd.com/read/38399520/coronary-artery-occlusion-with-sharp-blood-pressure-drop-during-general-anesthesia-induction-a-case-report
#30
Jae Young Ji, Yong Han Seo, Ho Soon Jung, Hea Rim Chun, Jin Soo Park, Woo Jong Kim, Jae Min Ahn, Yu Jun Park, Ye Eun Shin, Chan Ho Park
Most anesthetics reduce cardiac functions and lower blood pressure (BP), potentially causing excessive BP reduction in dehydrated patients or those with heart conditions, such as coronary artery disease (CAD). Considering the increased prevalence of cardiovascular disease with age, anesthesiologists must be cautious about BP reduction during general anesthesia in older adults. In the present case, a 76-year-old male patient with undiagnosed CAD in a hypovolemic state experienced a significant drop in systolic BP to the fifties during propofol and sevoflurane anesthesia...
January 29, 2024: Medicina
https://read.qxmd.com/read/38399160/microstructure-and-mechanical-behavior-comparison-between-cast-and-additive-friction-stir-deposited-high-entropy-alloy-al-0-35-cocrfeni
#31
JOURNAL ARTICLE
Zackery McClelland, Kyle Dunsford, Brady Williams, Haley Petersen, Keivan Devami, Mark Weaver, J Brian Jordan, Paul G Allison
High-entropy alloys (HEAs) are new alloy systems that leverage solid solution strengthening to develop high-strength structural materials. However, HEAs are typically cast alloys, which may suffer from large as-cast grains and entrapped porosity, allowing for opportunities to further refine the microstructure in a non-melting near-net shape solid-state additive manufacturing process, additive friction stir deposition (AFSD). The present research compares the microstructure and mechanical behavior of the as-deposited AFSD Al0...
February 16, 2024: Materials
https://read.qxmd.com/read/38399064/microstructure-and-friction-properties-of-alcrtivnb-x-high-entropy-alloys-via-annealing-manufactured-by-vacuum-arc-melting
#32
JOURNAL ARTICLE
Baowei Li, Zihao Zhang, Xiaoling Luo, Kangmin Chen, Jiaqi Zhang, Pan Gong, Zhen Peng
To enhance the friction and wear properties of alloys, AlCrTiVNbx high-entropy alloys (HEAs) with various Nb contents were prepared using the arc melting technique and then annealed at 1000 °C for 2 h. The microstructure and hardness changes in the AlCrTiVNbx (x = 0.3, 0.4, and 0.5) HEAs after casting and annealing were studied via scanning electron microscopy, X-ray diffractometry, optical microscopy and the Vickers hardness test. The MFT-EC400 ball disc reciprocating friction and wear tester was used to investigate the wear resistance of the HEAs before and after annealing...
February 8, 2024: Materials
https://read.qxmd.com/read/38396240/predicting-the-impact-of-cpap-on-brain-health-a-study-using-the-sleep-eeg-derived-brain-age-index
#33
JOURNAL ARTICLE
Soonhyun Yook, Hea Ree Park, Eun Yeon Joo, Hosung Kim
OBJECTIVE: This longitudinal study investigated potential positive impact of CPAP treatment on brain health in individuals with obstructive sleep Apnea (OSA). To allow this, we aimed to employ sleep electroencephalogram (EEG)-derived brain age index (BAI) to quantify CPAP's impact on brain health and identify individually varying CPAP effects on brain aging using machine learning approaches. METHODS: We retrospectively analyzed CPAP-treated (n = 98) and untreated OSA patients (n = 88) with a minimum 12-month follow-up of polysomnography...
February 23, 2024: Annals of Clinical and Translational Neurology
https://read.qxmd.com/read/38396229/unlocking-the-potential-of-high-entropy-alloys-in-electrochemical-water-splitting-a-review
#34
REVIEW
Abrar Ahmad, Adeela Nairan, Zhuo Feng, Ruiming Zheng, Yelin Bai, Usman Khan, Junkuo Gao
The global pursuit of sustainable energy is focused on producing hydrogen through electrocatalysis driven by renewable energy. Recently, High entropy alloys (HEAs) have taken the spotlight in electrolysis due to their intriguing cocktail effect, broad design space, customizable electronic structure, and entropy stabilization effect. The tunability and complexity of HEAs allow a diverse range of active sites, optimizing adsorption strength and activity for electrochemical water splitting. This review comprehensively covers contemporary advancements in synthesis technique, design framework, and physio-chemical evaluation approaches for HEA-based electrocatalysts...
February 23, 2024: Small
https://read.qxmd.com/read/38394854/erinacine-s-a-small-active-component-derived-from-hericium-erinaceus-protects-oligodendrocytes-and-alleviates-mood-abnormalities-in-cuprizone-exposed-rodents
#35
JOURNAL ARTICLE
Jing-Ting Fu, Chih-Jou Yang, Li-Ya Lee, Wan-Ping Chen, Yu-Wen Chen, Chin-Chu Chen, Yuan-Ting Sun, Chung-Shi Yang, Shun-Fen Tzeng
Hericium erinaceus mycelium extract (HEM), containing erinacine A (HeA) and erinacine S (HeS), has shown promise in promoting the differentiation of oligodendrocyte precursor cells (OPCs) into mature oligodendrocytes (OLs), crucial for myelin production in the central nervous system (CNS). The main aim of this study was to characterize the protective effects of HEM and its components on OLs and myelin in demyelinating rodents by exposure to cuprizone (CPZ), a copper chelating agent commonly used to induce demyelination in the corpus callosum of the brain...
February 22, 2024: Biomedicine & Pharmacotherapy
https://read.qxmd.com/read/38390642/independent-multiple-atom-site-functionality-in-composition-adjustable-immiscible-ru-rh-pd-pt-solid-solution-high-entropy-alloys-for-nox-reduction-outperforming-rh
#36
JOURNAL ARTICLE
Zhe Tan, Bo Huang
The high-entropy-alloy (HEA) nanoparticles with four, five or more metals significantly can yield the developments of functional materials with excellent performances in various reactions. However, the underlying reaction mechanisms of heterogeneous catalysis for HEA have been rarely investigated, due to their diverse elements and complex compositions. In this study, we successfully synthesized the homogeneously dispersed Ru-Rh-Pd-Pt HEA with adjustable compositions, as the multiple-atom-site catalysts (MASC)...
February 23, 2024: Angewandte Chemie
https://read.qxmd.com/read/38384552/a-review-on-wear-corrosion-and-wear-corrosion-synergy-of-high-entropy-alloys
#37
REVIEW
Tarik Zirari, Vera Trabadelo
Wear (erosion/abrasion) and corrosion act in synergy in several industrial installations where corrosive fluids circulate together with a solid phase causing mutual damage. High entropy alloys (HEAs) are promising materials to be used in that type of environments because of their outstanding chemical, electrochemical and mechanical properties. While several review articles are currently available on corrosion, mechanical properties, development of HEAs, microstructure, and HEA coatings, there is an undeniable lack of a comprehensive and critical review focusing on the tribological behaviour and tribocorrosion of bulk HEAs...
February 29, 2024: Heliyon
https://read.qxmd.com/read/38372003/hierarchical-porous-nonprecious-high-entropy-alloys-for-ultralow-overpotential-in-hydrogen-evolution-reaction
#38
JOURNAL ARTICLE
Chunyang Wang, Shen Zhao, Guoqiang Han, Haowei Bian, Xinrui Zhao, Lina Wang, Guangwen Xie
Water electrolysis is considered the cleanest method for hydrogen production. However, the widespread popularization of water splitting is limited by the high cost and scarce resources of efficient platinum group metals. Hence, it is imperative to develop an economical and high-performance electrocatalyst to improve the efficiency of hydrogen evolution reaction (HER). In this study, a hierarchical porous sandwich structure is fabricated through dealloying FeCoNiCuAl2 Mn high-entropy alloy (HEA). This free-standing electrocatalyst shows outstanding HER performance with a very small overpotential of 9...
February 19, 2024: Small Methods
https://read.qxmd.com/read/38370279/ros-responsive-4d-printable-acrylic-thioether-based-hydrogels-for-smart-drug-release
#39
JOURNAL ARTICLE
Maria Regato-Herbella, Isabel Morhenn, Daniele Mantione, Giuseppe Pascuzzi, Antonela Gallastegui, Ana Beatriz Caribé Dos Santos Valle, Sergio E Moya, Miryam Criado-Gonzalez, David Mecerreyes
Reactive oxygen species (ROS) play a key role in several biological functions like regulating cell survival and signaling; however, their effect can range from beneficial to nondesirable oxidative stress when they are overproduced causing inflammation or cancer diseases. Thus, the design of tailor-made ROS-responsive polymers offers the possibility of engineering hydrogels for target therapies. In this work, we developed thioether-based ROS-responsive difunctional monomers from ethylene glycol/thioether acrylate (EG n SA) with different lengths of the EG n chain ( n = 1, 2, 3) by the thiol-Michael addition click reaction...
February 13, 2024: Chemistry of Materials: a Publication of the American Chemical Society
https://read.qxmd.com/read/38365867/rejuvenation-as-the-origin-of-planar-defects-in-the-crconi-medium-entropy-alloy
#40
JOURNAL ARTICLE
Yang Yang, Sheng Yin, Qin Yu, Yingxin Zhu, Jun Ding, Ruopeng Zhang, Colin Ophus, Mark Asta, Robert O Ritchie, Andrew M Minor
High or medium- entropy alloys (HEAs/MEAs) are multi-principal element alloys with equal atomic elemental composition, some of which have shown record-breaking mechanical performance. However, the link between short-range order (SRO) and the exceptional mechanical properties of these alloys has remained elusive. The local destruction of SRO by dislocation glide has been predicted to lead to a rejuvenated state with increased entropy and free energy, creating softer zones within the matrix and planar fault boundaries that enhance the ductility, but this has not been verified...
February 16, 2024: Nature Communications
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