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Dielectric dispersion and thermodynamic behavior of stearic acid binary mixtures with alcohol as co-solvent using time domain reflectometry

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Journal of Advanced Dielectrics 2017年第4期7卷 34-40页

作者： m.maria sylvester T.Ganesh D.J.S.Anand Karunakaran P.Senthilkumar Praveen G.Hudge A.C.Kumbharkhane PG&Research Department of Physics Bishop Heber CollegeBharthidasan University Tiruchirapalli 620017Tamil NaduIndia PG&Research Department of Physics Rajah Serfoji Government College Bharthidasan University Thanjavur 613005Tamil NaduIndia Department of Physics Saranathan College of Engineering Tiruchirapalli 620012Tamil NaduIndia Department of Physics S.I.C.E.Society's Degree College of Arts Science and CommerceAmbernathThaneMaharashtraIndia School of Physical Sciences Swami Ramanad Teerth Marthwada University NandedMaharashtraIndia

Dielectric permittivity and relaxation dynamics of binary and ternary mixture of stearic acid on various concentration and their thermodynamic effects are *** static dielectric constant(ε_(0)),dielectric permittivity(ε′)and dielectric loss(ε″)are found by bilinear *** relaxation time(τ),dielectric strength(Δε)and the excess permittivity(ε^(E))are *** thermodynamic parameters such as enthalpy(ΔH),entropy(ΔS)and Gibb's free energy(ΔG)are *** significant changes in dielectric parameters are due to the intramolecular and intermolecular interactions in response to the applied *** permittivity spectra of stearic acid–alcohol in the frequency range of 10mHz to 30 GHz have been measured using picoseconds Time Domain Reflectometry(TDR).The dielectric parameters(ε_(0),ε′,ε″)are found by bilinear calibration *** of temperature in intermolecular interaction and the relaxation process are also *** FT-IR spectral analysis reveals that the conformation of functional groups and formation for hydrogen bonding are present in both binary and ternary mixtures of stearic acid.

关键词： TDR dielectric relaxation stearic acid thermodynamic parameters FT-IR

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Efficacy of acupuncture on cancer pain:A systematic review and meta-analysis

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Journal of Integrative medicine 2024年第3期22卷 235-244页

作者： miguel Faria mónica Teixeira maria João Pinto Paulo Sargento Núcleo de Investigação em Ciências e Tecnologias da Saúde Instituto Politécnico da Lusofonia1950-396 LisboaPortugal Clínica São João de Deus 1700-048 LisboaPortugal REQUImTE/LAQV(Rede de Química e Tecnologia/Laboratório Associado para a Química Verde) Instituto Superior de EngenhariaInstituto Politécnico do Porto4051-401 PortoPortugal Hospital SOERAD 2560-312 Torres VedrasPortugal Centro de Estudos Avançados em Direito“Francisco Suarez ”1749-024 LisboaPortugal

Background:Pain associated with cancer is one of the greatest causes of reduced quality of life in *** is one of the treatments used to address this issue,with the great advantage of having little or no side effects,especially when compared with pharmacological ***:The aim of this systematic review and meta-analysis was to evaluate the current evidence regarding the efficacy of acupuncture for cancer *** strategy:Six electronic databases(Pubmed,EBSCO,Cochrane Library,Scielo,b-On and Scopus)were searched for relevant articles about pain relief in cancer patients from their beginning until 2022using meSH terms such as“acupuncture,”“electroacupuncture,”“ear acupuncture,”“acupuncture analgesia,”“oncological pain,”and“cancer pain.”Inclusion criteria:Studies included were randomized controlled trials(RCTs)where acupuncture was compared with no treatment,placebo acupuncture or usual *** extraction and analysis:Three independent reviewers participated in data extraction and evaluation of risk of bias,and a meta-analysis was *** primary outcome was pain intensity,measured with the visual analog scale,numeric rating scale,or brief pain *** outcomes also assessed were quality of life,functionality,xerostomia,pain interference,and analgesic *** were expressed as standardized mean difference(SmD)with 95%confidence interval(CI).Results:Sixteen RCTs with a total of 1124 participants were included in the meta-analysis,with the majority of the studies presenting a low or unclear risk of *** was more effective in reducing pain than no treatment(SmD=–0.90,95%CI[–1.68,–0.12]),sham acupuncture(SmD=–1.10,95%CI[–1.59,–0.61])or usual care(SmD=–1.16,95%CI[–1.38,–0.93]).Conclusion:The results of this study suggest that acupuncture may be an effective intervention to reduce pain associated with *** some limitations due to the low quality and small sample size of some included st

关键词： Acupuncture Cancer pain meta-analysis Systematic review

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Tuning structural,electrical,dielectric and magnetic properties of mg-Cu-Co ferrites via dysprosium(Dy^(3+))doping

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Journal of Rare Earths 2024年第1期42卷 137-146,I0005页

作者： maria Akhtar m.S.Hasan Nasir Amin N.A.morley muhammad Imran Arshad Department of Physics Government College UniversityFaisalabad38000Pakistan Department of Physics The University of Lahore53700Pakistan Department of materials Science and Engineering The University of SheffieldS13JDUK Department of Physics&Astronomy University College LondonUK

In current research work,Dy3+substituted mg0.5Cu0.25Co0.25Fe2-xDyxO4(0.0≤x≤0.04 with the step interval of 0.01)soft ferrites were synthesized by the sol-gel auto combustion *** prepared samples were characterized by the techniques using X-ray diffraction(XRD),scanning electron microscopy(SEm),energy dispersive X-ray spectroscopy(EDS),Fourier transform infrared(FTIR)spectroscopy,curre nt-voltage(Ⅰ-Ⅴ)measurement,LCR meter,vibrating sample magnetometer(VSm)and *** data reveal that the average crystallite size is 49.71 nm and the lattice constant is 0.83703 nm for sample x=*** non-uniform grain growth was demonstrated by micrographs and impurity-free elemental composition was observed from EDX *** DC resistivity has an increasing and decreasing trend in ferromagnetic and paramagnetic regions with an increase in ***,the high resistivity is observed with the order of 1010Ω·cm,and the activation energy is 0.944 eV for samples x=*** dielectric parameters including dielectric constant,dielectric losses,and impedance gradually decrease with the increase in frequency from 8 Hz to 8 *** minimum dielectric loss at high frequency is found for sample x=*** coercivity(Hc)and saturation magnetization(ms)are found in the ranges of 520.82-544.02 Oe and 20.5841-21.1473 emu/g,*** observations confirm that dysprosium(x=0.03)doped mCC-soft ferrites may be applicable in transformer cores,microwave absorbance,and telecommunication devices.

关键词： Soft ferrites DC resistivity Dielectric loss Impedance Coercivity Rare earths

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Development of an active-site titrant for SARS-CoV-2 main protease as an indispensable tool for evaluating enzyme kinetics

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Acta Pharmaceutica Sinica B 2024年第5期14卷 2349-2357页

作者： Rabea Voget Julian Breidenbach Tobias Claff Alexandra Hingst Katharina sylvester Christian Steinebach Lan Phuong Vu Renato H.Weiße Ulrike Bartz Norbert Sträter Christa E.müller michael Gütschow Pharmaceutical Institute Pharmaceutical&Medicinal ChemistryUniversity of BonnBonn 53121Germany Institute of Bioanalytical Chemistry Center for Biotechnology and BiomedicineLeipzig UniversityLeipzig 04103Germany Department of Natural Sciences University of Applied Sciences Bonn-Rhein-SiegRheinbach 53359Germany

A titrant for the SARS-CoV-2 main protease(m^(pro))was developed that enables,for the first time,the exact determination of the concentration of the enzymatically active m^(pro) by active-site *** covalent binding mode of the tetrapeptidic titrant was elucidated by the determination of the crystal structure of the enzyme–titrant *** fluorogenic substrates of m^(pro),including a prototypical,internally quenched Dabcyl-EDANS peptide,were compared in terms of solubility under typical assay *** exploiting the new titrant,key kinetic parameters for the m^(pro)-catalyzed cleavage of these substrates were determined.

关键词： COVID-19 SARS-CoV-2 main protease Peptide nitriles Fluorogenic substrates Active-site titration X-ray crystallography Inner filter effect

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In‑depth proteome characterization of endometrium and extraembryonic membranes during implantation in pig

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Journal of Animal Science and Biotechnology 2024年第3期15卷 1027-1055页

作者： maria A.Gil Josep m.Cambra Heriberto Rodriguez‑martinez Cristina Cuello Inmaculada Parrilla Emilio A.martinez Department of medicine and Animal Surgery International Excellence Campus for Higher Education and Research“Campus Mare Nostrum”University of MurciaMurciaSpain Institute for Biomedical Research of murcia(ImIB-Pascual Parrilla) MurciaSpain Technical University of munich MunichGermany Department of Biomedical&Clinical Sciences(BKV) BKH/Obstetrics&GynaecologyLinkoping UniversityLinkopingSweden

Background Proteome characterization of the porcine endometrium and extraembryonic membranes is important to understand mother-embryo *** this study,the proteome of the endometrium and cho-rioallantoic membrane was characterized in pregnant sows(PS)during early gestation(d 18 and 24 of gestation)and in the endometrium of non-pregnant sows(NPS)during the same days using LC-mS/mS *** UniProtKB database and ClueGO were used to obtain functional Gene Ontology annotations and biological and functional networks,*** Our analysis yielded 3,254 and 3,457 proteins identified in the endometrium of PS and NPS,respectively;of these,1,753 being common while 1,501 and 1,704 were exclusive to PS and NPS,*** addition,we iden-tified 3,968 proteins in the extraembryonic membranes of *** analyses of function revealed some proteins had relevance for the immune system process and biological adhesion in endometrium while the embryonic chorion displayed abundance of proteins related to cell adhesion and cytoskeletal organization,suggesting they dominated the moment of endometrial remodeling,implantation and adhesion of the lining *** are available via Pro-teomeXchange with identifier *** This is the first in-depth proteomic characterization of the endometrium and extraembryonic mem-branes during weeks 3 to 4 of gestation;data that contribute to the molecular understanding of the dynamic environ-ment during this critical period,associated with the majority of pregnancy losses.

关键词： Endometrium Extraembryonic membranes Implantation Pig Proteome

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Transcriptional reprogramming during human osteoclast differentiation identifies regulators of osteoclast activity

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Bone Research 2024年第1期12卷 180-198页

作者： morten S.Hansen Kaja madsen maria Price Kent Søe Yasunori Omata mario m.Zaiss Caroline m.Gorvin morten Frost Alexander Rauch molecular Endocrinology Laboratory(KmEB) Department of EndocrinologyOdense University HospitalDK-5000 Odense CDenmark Department of Clinical Research Faculty of Health SciencesUniversity of Southern DenmarkDK-5000 Odense CDenmark Clinical Cell Biology Pathology Research UnitDepartment of Clinical ResearchUniversity of Southern DenmarkDK-5000 Odense CDenmark Institute of metabolism and Systems Research(ImSR)and Centre for Diabetes Endocrinology and Metabolism(CEDAM)University of BirminghamBirmingham B152TTUK Centre for membrane Proteins and Receptors(COmPARE) Universities of Birmingham and NottinghamBirmingham B152TTUK Department of molecular medicine University of Southern DenmarkDK-5000 Odense CDenmark Department of Orthopedic Surgery Faculty of MedicineThe University of TokyoTokyo 113-8655Japan Department of Internal medicine 3 Rheumatology and ImmunologyFriedrich-Alexander-University Erlangen-Nürnberg(FAU)and Universitätsklinikum ErlangenD-91054 ErlangenGermany Deutsches Zentrum Immuntherapie(DZI) Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum ErlangenD-91054 ErlangenGermany Steno Diabetes Center Odense Odense University HospitalDK-5000 Odense CDenmark

Enhanced osteoclastogenesis and osteoclast activity contribute to the development of osteoporosis,which is characterized by increased bone resorption and inadequate bone *** novel antiosteoporotic therapeutics are needed,understanding the genetic regulation of human osteoclastogenesis could help identify potential treatment *** study aimed to provide an overview of transcriptional reprogramming during human osteoclast *** were differentiated from CD14+monocytes from eight female *** sequencing during differentiation revealed 8980 differentially expressed genes grouped into eight temporal patterns conserved across *** patterns revealed distinct molecular functions associated with postmenopausal osteoporosis susceptibility genes based on RNA from iliac crest biopsies and bone mineral density *** analyses revealed mutual dependencies between temporal expression patterns and provided insight into subtype-specific transcriptional *** donor-specific expression patterns revealed genes at the monocyte stage,such as filamin B(FLNB)and oxidized low-density lipoprotein receptor 1(OLR1,encoding LOX-1),that are predictive of the resorptive activity of mature *** expression of differentially expressed G-protein coupled receptors was strong during osteoclast differentiation,and these receptors are associated with bone mineral density SNPs,suggesting that they play a pivotal role in osteoclast differentiation and *** regulatory effects of three differentially expressed G-protein coupled receptors were exemplified by in vitro pharmacological modulation of complement 5 A receptor 1(C5AR1),somatostatin receptor 2(SSTR2),and free fatty acid receptor 4(FFAR4/GPR120).Activating C5AR1 enhanced osteoclast formation,while activating SSTR2 decreased the resorptive activity of mature osteoclasts,and activating FFAR4 decreased both the number and resorptive activity of mature *** conclus

关键词： osteoclast programming identif

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Petrophysical Evaluation of Cape Three Points Reservoirs

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International Journal of Geosciences 2024年第2期15卷 162-179页

作者： Striggner Bedu-Addo sylvester Kojo Danuor Larry Pax Chegbeleh Department of Physics Kwame Nkrumah University of Science and Technology Kumasi Ghana Department of Earth Science University of Ghana Accra Ghana

The findings of a study to ascertain and assess the petrophysical characteristics of Cape Three Points reservoirs in the Western basin with a view to describe the reservoir quantitatively using Well Logs, Petrel and Techlog. The investigated characteristics, which were all deduced from geophysical wire-line logs, include lithology, porosity, permeability, fluid saturation, and net to gross thickness. To characterise the reservoir on the field, a suite of wire-line logs including gamma ray, resistivity, spontaneous potential, and density logs for three wells (WELL_1X, WELL_2X, and WELL_3X) from the Tano Cape Three Point basin were studied. The analyses that were done included lithology delineation, reservoir identification, and petrophysical parameter determination for the identified reservoirs. The tops and bases of the three wells analysed were marked at a depth of 1203.06 - 2015.64 m, 3863.03 - 4253.85 m and 2497.38 - 2560.32 m respectively. There were no hydrocarbons in the reservoirs from the studies. The petrophysical parameters computed for each reservoir provided porosities of 13%, 3% and 11% respectively. The water saturation also determined for these three wells (WELL_1X, WELL_2X and WELL_3X) were 94%, 95% and 89% respectively. These results together with the behaviour of the density and neutron logs suggested that these wells are wildcat wells.

关键词： Petrophysical Cape Three Points Reservoirs

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In vivo polydopamine coating of Rhodobacter sphaeroides for enhanced electron transfer

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Nano Research 2024年第2期17卷 875-881页

作者： Rossella Labarile Danilo Vona maria Varsalona matteo Grattieri melania Reggente Roberto Comparelli Gianluca m.Farinola Fabian Fischer Ardemis A.Boghossian massimo Trotta Istituto per i Processi Chimico Fisici Consiglio Nazionale delle RicercheBari 70126Italy Dipartimento di Chimica Universitàdegli Studi di BariBari 70126Italy Institute of Chemical Sciences and Engineering(ISIC) Ecole Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Institute of Life Technologies HES-SO Valais-Wallis1950 SionSwitzerland Institute for Renewable Energy HES-SO Valais-Wallis1950 SionSwitzerland

Recent advances in coupling light-harvesting microorganisms with electronic components have led to a new generation of biohybrid devices based on microbial *** devices are limited by the poorly conductive interface between phototrophs and synthetic materials that inhibit charge *** study focuses on overcoming this bottleneck through the metabolically-driven encapsulation of photosynthetic cells with a bio-inspired conductive *** of the purple non sulfur bacterium Rhodobacter sphaeroides were coated with a polydopamine(PDA)nanoparticle layer via the self-polymerization of dopamine under anaerobic *** treated cells show preserved light absorption of the photosynthetic pigments in the presence of dopamine concentrations ranging between 0.05–3.5 *** thickness and nanoparticle formation of the membrane-associated PDA matrix were further shown to vary with the dopamine concentrations in this *** to uncoated cells,the encapsulated cells show up to a 20-fold enhancement in transient photocurrent measurements under mediatorless *** biologically synthesized PDA can thus act as a matrix for electronically coupling the light-harvesting metabolisms of cells with conductive surfaces.

关键词： bioelectronics photosynthetic bacteria purple bacteria electron transfer polydopamine biophotovoltaics

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Kinetic scale magnetic holes in the terrestrial magnetosheath:A review

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Science China Earth Sciences 2024年第9期67卷 2739-2771页

作者： Quanqi SHI Shutao YAO maria HAmRIN Ji LIU Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong University Department of Physics Ume? University Department of Physics University of Alberta

magnetic holes at the ion-to-electron kinetic scale(KSmHs) are one of the extremely small intermittent structures generated in turbulent magnetized plasmas. In recent years, the explorations of KSmHs have made substantial strides, driven by the ultra-high-precision observational data gathered from the magnetospheric multiscale(mmS) mission. This review paper summarizes the up-to-date characteristics of the KSmHs observed in Earth's turbulent magnetosheath, as well as their potential impacts on space plasma. This review starts by introducing the fundamental properties of the KSmHs, including observational features, particle behaviors, scales, geometries, and distributions in terrestrial space. Researchers have discovered that KSmHs display a quasi-circular electron vortex-like structure attributed to electron diamagnetic drift. These electrons exhibit noticeable non-gyrotropy and undergo acceleration. The occurrence rate of KSmH in the Earth's magnetosheath is significantly greater than in the solar wind and magnetotail, suggesting the turbulent magnetosheath is a primary source region. Additionally, KSmHs have also been generated in turbulence simulations and successfully reproduced by the kinetic equilibrium models. Furthermore,KSmHs have demonstrated their ability to accelerate electrons by a novel non-adiabatic electron acceleration mechanism, serve as an additional avenue for energy dissipation during magnetic reconnection, and generate diverse wave phenomena, including whistler waves, electrostatic solitary waves, and electron cyclotron waves in space plasma. These results highlight the magnetic hole's impact such as wave-particle interaction, energy cascade/dissipation, and particle acceleration/heating in space *** end this paper by summarizing these discoveries, discussing the generation mechanism, similar structures, and observations in the Earth's magnetotail and solar wind, and presenting a future extension perspective in this active field.

关键词： magnetic hole Whistler magnetic dip/cavity Electron vortex magnetosheath Turbulence Coherent structure mirror mode Kinetic scale Electron acceleration

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Advancing oxygen separation:insights from experimental and computational analysis of La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)m_(0.1)O_(3-δ)(m=Cu,Zn)oxygen transport membranes

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Frontiers of Chemical Science and Engineering 2024年第6期18卷 17-29页

作者： Guoxing Chen Wenmei Liu marc Widenmeyer Xiao Yu Zhijun Zhao Songhak Yoon Ruijuan Yan Wenjie Xie Armin Feldhoff Gert Homm Emanuel Ionescu maria Fyta Anke Weidenkaff Fraunhofer Research Institution for materials Recycling and Resource Strategies IWKS Alzenau 63755Germany Electrochemistry Laboratory Paul Scherrer InstituteVilligen PSI 5232Switzerland Department of materials and Earth Sciences Materials and ResourcesTechnical University of DarmstadtDarmstadt 64287Germany Institute of Physical Chemistry and Electrochemistry Leibniz University HannoverHannover 30167Germany Institute for Computational Physics University of StuttgartStuttgart 70569Germany Computational Biotechnology RWTH AachenAachen 52074Germany

In this study,perovskite-type La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)m_(0.1)O_(3-δ)(m=Cu,Zn)powders were synthesized using a scalable reverse co-precipitation method,presenting them as novel materials for oxygen transport *** comprehensive study covered various aspects including oxygen permeability,crystal structure,conductivity,morphology,CO_(2) tolerance,and long-term regenerative durability with a focus on phase structure and *** membrane La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)m_(0.1)O_(3-δ)exhibited high oxygen permeation fluxes,reaching up to 0.88 and 0.64 mL·min^(−1)·cm^(−2) under air/He and air/CO_(2) gradients at 1173 K,*** 1600 h of CO_(2) exposure,the perovskite structure remained intact,showcasing superior CO_(2) resistance.A combination of first principles simulations and experimental measurements was employed to deepen the understanding of Cu/Zn substitution effects on the structure,oxygen vacancy formation,and transport behavior of the *** findings underscore the potential of this highly CO_(2)-tolerant membrane for applications in high-temperature oxygen *** enhanced insights into the oxygen transport mechanism contribute to the advancement of next-generation membrane materials.

关键词： perovskite oxygen permeation membrane oxygennionsdiffusiono xygen vacancy formation energy energy barrier

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