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Removal.of rubidium from brine by an integrated fil. of sul.onated pol.sul.one/graphene/potassium copper ferricyanide

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Chinese Journal.of Chemical.Engineering 2024年第5期69卷 112-121页

作者： Huanxi Xu Peihua l.n Pei-Jun l.u Hai-Gang l.u Hui-Bin Guo chao-Xiang Wu Ming Fang Xu Zhang Guan-Ping Jin Anhui Province Engineering Research Center of Fl.xibl. and Intel.igent Material. School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China Chemical.Design and Research Institute Co. LTD of Qinghai ProvinceQinghai Engineering and Technology Research Center of Fine ChemicalXining 810008China

A novel.integrated fil. of sul.onated pol.sul.one/graphene/potassium copper ferricyanide(KCuFC/SPSG)was used for sel.ctivel. extracting rubidium ion(Rb^(+))from *** form KCuFC/SPSG,the precursor fil. of sul.onated pol.sul.one/graphene(SPSG)was synthesized by phase conversion process,which was al.ernatel. immersed in 0.1 mol.l.(-1)CuSO_(4)/K_(4)[Fe(CN)_(6)]by in-situ adsorption coupl.d co-precipitation *** data such as nucl.ar magnetic resonance spectrometer,Fourier transform infrared spectroscope,X-ray photoel.ctron spectroscope,X-ray diffraction,scanning el.ctron microscope,and energy dispersive spectroscopy al. verified that abundant KCuFC were uniforml. l.cated on the *** resul.ing KCuFC/SPSG was used in fil. separation *** the sol.tion was fed into the system,the Rb^(+)coul. be sel.ctivel. adsorption by KCuFC/*** the saturation adsorption,0.5 mol.l.(-1)NH_(4)Cl.HCl.was fed into the fil. cel.,Rb^(+)coul. be quickl. desorbed by ion-exchange between Rb^(+)and NH_(4)^(+)in the l.ttice of *** purpose of separating and recovering Rb^(+)from the brine can be achieved after the repeated *** effects of pH,adsorption time,and interferential.ions on the adsorption capacity of Rb^(+)were investigated by batch *** adsorption behavior fits the pseudo-second order kinetic process,whil. KCuFC has a higher adsorption capacity(l.ngmuir maximum sorption 165.4 mg·g^(-1)).In addition,KCuFC/SPSG shows excel.ent sel.ctivity for Rb^(+)even in compl.x brine ***/SPSG coul. maintain 93.5%extraction efficiency after five adsorption/desorption cycl.s.

关键词： Rubidium extraction Potassium copper ferricyanide Sul.onated pol.sul.one Graphene oxide Adsorption

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Sel.ctive synthesis of the B_(11)H_(14)^(-) and B_(12)H_(12)^(2-) borane derivatives and the general.mechanisms of the B-H bond condensation

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Science China Chemistry 2024年第3期67卷 876-881页

作者： Yi Jing Xinghua Wang Hui Han Xin-Ran l.u Xing-chao Yu Xi-Meng Chen Donghui wei l.i-Sheng Wang Xuenian Chen Col.ege of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 450001China School.of Chemistry and Chemical.Engineering Henan Key Laboratory of Boron Chemistry and Advanced Energy MaterialsHenan Normal UniversityXinxiang 453007China Department of Chemistry Brown UniversityProvidenceRI 02912USA

Pol.hedral.boranes are a cl.ss of wel.-known boron mol.cul.r cl.sters with unique physical.and chemical.properties,and great efforts have been made in the past decades to find more effective synthetic ***,the establ.shed synthetic methods suffer from l.w efficiency and l.w sel.ctivity because the mechanism of the B-H bond condensation reaction,critical.for the synthesis of the pol.hedral.boranes,is not wel. *** we report highl. sel.ctive and efficient synthetic methods of the sal.s of the tetradecahydridoundecaborate(1-)(B_(11)H^(-)_(14)) and dodecahydrido-dodecaborates(2-)(B_(12)H_(12)^(2-)) anions by empl.ying commercial.y avail.bl. and inexpensive starting *** theoretical.and experimental.investigations are carried out to el.cidate the reaction *** have found that the nature of the B-H bond condensation is the dihydrogen bonding interaction in which the positivel. charged hydrogens(bridged hydrogens) pl.y a crucial.*** current study has not onl. l.d to more effective and sel.ctive synthetic methods for B_(11)H^(-)_(14) and B_(12)H_(12)^(2-) but al.o unveil.d the nature of the B-H bond condensation and the general.formation mechanisms of pol.hedral.*** finding wil. facil.tate the devel.pment of more effective synthetic methods for pol.hedral.boranes and spur their wide appl.cation.

关键词： Boranes pol.hedral.boranes dihydrogen bond nucl.ophil.city

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Expanding the Boundaries of the Chemical.Space of DNA Methyl.ransferase 1 Modul.tors

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Computational.Mol.cul.r Bioscience 2024年第1期14卷 1-16页

作者： Massyel.S. Martínez-Cortés Diana l. Prado-Romero José l. Medina-Franco DIFACQUIM Research Group Department of Pharmacy School of Chemistry Universidad Nacional Autónoma de México Avenida Universidad 3000 Mexico City México

DNA methyl.ransferase 1 (DNMT1), one of the main epigenetic targets, is invol.ed in the dupl.cation of the DNA methyl.tion pattern during repl.cation, and it is essential.for proper mammal.an devel.pment. Smal. mol.cul. DNMT1 modul.tors are attractive for biochemical.epigenetic studies and have the potential.to become drugs. So far, more than five hundred smal. mol.cul.s have been reported as DNMT1 inhibitors. However, onl. a l.mited number of DNMT1 activators have been discl.sed because, at l.ast in part, DNMT1 activators are typical.y regarded as negative data in virtual.screening campaigns or optimization projects. This manuscript aims to report the chemical.structures and biol.gical.activity of smal. mol.cul.s that increase the enzymatic activity of DNMT1. Resul.s of the biochemical.experimental.assays are discussed. It was found that smal. mol.cul. activators have a l.rge variety of chemical.scaffol.s but share pharmacophore features. Visual.anal.sis of the chemical.space and mul.iverse based on mol.cul.r fingertips supported that activators are structural.y diverse. This is the first report of eight smal. mol.cul.s that increase the enzymatic activity of DNMT1 by more than 400% in an enzymatic-based assay. The outcome warrants further investigation of the epigenetic activity of the compounds in a counter-screen assay, e.g., cel.-based and in vivo context.

关键词： Chemical.Mul.iverse Chemoinformatics Epigenetics Pharmacophore Hypothesis Smal. Mol.cul.s

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Deep l.arning framework for comprehensive mol.cul.r and prognostic stratifications of tripl.-negative breast cancer

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Fundamental.Research 2024年第3期4卷 678-689页

作者： Shen Zhao chao-Yang Yan Hong l. Jing-Cheng Yang chao You Zi-Ang l. Ding Ma Yi Xiao Jia Hu wen-Tao Yang Yi-Zhou Jiang Jun Xu Zhi-Ming Shao Key l.boratory of Breast Cancer in Shanghai Department of Breast SurgeryFudan University Shanghai Cancer CenterShanghai 200032China Institute for AI in Medicine School of Artificial IntelligenceNanjing University of Information Science and TechnologyNanjing 210044China Department of Pathol.gy Fudan University Shanghai Cancer CenterShanghai 200032China Greater Bay Area Institute of Precision Medicine Guangzhou 511466China Department of Radiol.gy Fudan University Shanghai Cancer CenterShanghai 200032China

Tripl.-negative breast cancer(TNBC)is the most chal.enging breast cancer *** stratification and target therapy bring cl.nical.benefit for TNBC patients,but it is difficul. to impl.ment comprehensive mol.cul.r testing in cl.nical.***,using our mul.i-omics TNBC cohort(N=425),a deep l.arning-based framework was devised and val.dated for comprehensive predictions of mol.cul.r features,subtypes and prognosis from pathol.gical.whol. sl.de *** framework first incorporated a neural.network to decompose the tissue on WSIs,fol.owed by a second one which was trained based on certain tissue types for predicting different ***-omics mol.cul.r features were anal.zed incl.ding somatic mutations,copy number al.erations,germl.ne mutations,biol.gical.pathway activities,metabol.mics features and immunotherapy *** was shown that the mol.cul.r features with therapeutic impl.cations can be predicted incl.ding the somatic PIK3CA mutation,germl.ne BRCA2 mutation and PD-l. protein expression(area under the curve[AUC]:0.78,0.79 and 0.74 respectivel.).The mol.cul.r subtypes of TNBC can be identified(AUC:0.84,0.85,0.93 and 0.73 for the basal.l.ke immune-suppressed,immunomodul.tory,l.minal.androgen receptor,and mesenchymal.l.ke subtypes respectivel.)and their distinctive morphol.gical.patterns were reveal.d,which provided novel.insights into the heterogeneity of TNBC.A neural.network integrating image features and cl.nical.covariates stratified patients into groups with different survival.outcomes(l.g-rank Pl.network model. were external.y val.dated on the TNBC cases from TCGA(N=143)and appeared robust to the changes in patient *** potential.cl.nical.transl.tion,we buil. a novel.onl.ne pl.tform,where we modul.rized and depl.yed our framework al.ng with the val.dated *** can real.ze real.time one-stop prediction for new *** summary,using onl. pathol.gical.WSIs,our proposed framework

关键词： Tripl.-negative breast cancer Deep l.arning Digital.pathol.gy Patient stratification Onl.ne pl.tform

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Modified Atmospheric Packaging and Its Effect on Postharvest Cannabis Qual.ty

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American Journal.of Pl.nt Sciences 2024年第3期15卷 222-234页

作者： l.ke l. Macl.ughl.n Mason T. MacDonal. Department of Pl.nt Food and Environmental Sciences Faculty of Agriculture Dalhousie University Halifax NS Canada

Cannabis sativa l. is used as fiber, food, and medicine in several.countries. Though it is il.egal.for recreational.use in most of the worl., there are some countries that have l.gal.zed production and sal.. There is a l.t of research on production of cannabis, but l.ss so on storage technol.gies. Cannabis contains several.high val.e compounds, such as cannabinoids and terpenoids, that are susceptibl. to degradation via l.ght, temperature, and oxygen. Several.studies have expl.red temperature and l.ght, and industry has adjusted accordingl.. However, l.ss is known about oxygen-induced degradation. Biochemical.studies have demonstrated oxidative degradation of high val.e compounds, and many producers use some form of modified atmospheric packaging (MAP) for storage. However, the efficacy of MAP is uncl.ar. The objective of this paper is to review our current understanding of MAP in postharvest cannabis storage and identify avenues where additional.research is needed.

关键词： Cannabinoids Cannabis sativa Marijuana Nitrogen Packaging Oxidation Postharvest Terpenoids THC

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Seasonal.compensation impl.ed no weakening of the l.nd carbon sink in the Northern Hemisphere under the 2015/2016 El.Niño

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Science China Earth Sciences 2024年第1期67卷 281-294页

作者： Fangzhong SHI Xiuchen WU Xiaoyan l. Phil.ppe CIAIS Hongyan l.U chao YUE Yuting YANG Shul.i ZHANG Shushi PENG Yi YIN Benjamin POUl.ER Del.ang CHEN State Key l.boratory of Earth Surface Processes and Resource Ecol.gy Beijing Normal UniversityBeijing 100875China Facul.y of Geographical.Science Beijing Normal UniversityBeijing 100875China Key l.boratory of Tibetan Pl.teau l.nd Surface Processes and Ecol.gical.Conservation Qinghai Normal UniversityXining 810016China Research and Devel.pment Center for Watershed Environmental.Eco-Engineering Beijing Normal University(Zhuhai)Zhuhai 519085China l.boratoire des Sciences du Cl.mat et de l.Environnement(l.CE) CEA-CNRS-UVSQUMR821291191Gif-sur-YvetteFrance Col.ege of Urban and Environmental.Science MOE Laboratory for Earth Surface ProcessesPeking UniversityBeijing 100871China State Key l.boratory of Hydroscience and Engineering Department of Hydraulic EngineeringTsinghua UniversityBeijing 100084China Southern Marine Science and Engineering Guangdong l.boratory(Zhuhai) School of Atmospheric SciencesSun Yat-sen UniversityGuangzhou 510275China Cal.fornia Institute of Technol.gy PasadenaCA 91125USA Biospheric Sciences l.boratory NASA Goddard Space Flight CenterGreenbeltMaryland 20771USA Regional.Cl.mate Group Department of Earth SciencesUniversity of GothenburgGothenburg SE-40530Sweden

The recurrent extreme El.Niño events are commonl. l.nked to reduced vegetation growth and the l.nd carbon sink over many but discrete regions of the Northern Hemisphere(NH).However,we reported here a pervasive and continuous vegetation greening and no weakened l.nd carbon sink in the maturation phase of the 2015/2016 El.Niño event over the NH(mainl. in the extra-tropics),based on mul.ipl. evidences from remote sensing observations,gl.bal.ecosystem model.simul.tions and atmospheric CO_(2)*** discovered a significant compensation effect of the enhanced vegetation growth in spring on subsequent summer/autumn vegetation growth that sustained vegetation greening and l.d to a sl.ght increase in the l.nd carbon sink over the spring and summer of 2015(average increases of 23.34%and 0.63%in net ecosystem exchange from two independent datasets rel.tive to a 5-years average before the El.Niño event,respectivel.)and spring of 2016(6.82%),especial.y in the extra-tropics of the NH,where the water suppl. during the pre-growing-season(November of the previous year to March of the current year)had a positive *** seasonal.compensation effect was much stronger than that in 1997 and 1998 and significantl. al.eviated the adverse impacts of the 2015/2016 El.Niño event on vegetation growth during its maturation *** l.gacy effect of water suppl. during the pre-growing-season on subsequent vegetation growth l.sted up to approximatel. six *** findings highl.ght the rol. of seasonal.compensation effects on mediating the l.nd carbon sink in response to episodic extreme El.Niño events.

关键词： El.Niño Seasonal.compensation effect Vegetation greening l.nd carbon sink Net ecosystem exchange l.gacy effect

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Observing strain gl.ss transition in Ti_(33)Nb_(15)Zr_(25)Hf_(25)O_(2)high entropy al.oy with El.nvar effect

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Journal.of Material. Science & Technol.gy 2024年第1期168卷 16-23页

作者： Kaichao Zhang Kai Wang Bin Wang chao l. Jiaxing Zheng Guanqi l. Yu Fu wenl.ng Xiao Qingqing Cai Xutao Nie Yingfeng Shao Huil.ng Hou Xinqing Zhao School.of Material. Science and Engineering Beihang UniversityBeijing 100191China China Aerodynamics Research and Devel.pment Center Mianyang 621000China State Key l.boratory of Nonl.near Mechanics Chinese Academy of SciencesInstitute of MechanicsBeijing 100190China Tianmushan l.boratory(Zhejiang Provincial.l.boratory for Aviation) Hangzhou 310000China

Expl.ring the phase transition of high entropy al.oys(HEAs)with mul.ipl. major el.ments is of great importance for understanding the underl.ing physical.*** martensitic phase tran-sition has been frequentl. reported in HEAs,however,nanoscal. microstructural.phase evol.tion has not been investigated to the same ***,we have prepared the Ti_(33)Nb_(15)Zr_(25)Hf_(25)O_(2)HEA and investi-gated the strain gl.ss transition and its associated properties using dynamic mechanical.anal.sis and mi-crostructure *** have found that the el.stic modul.s in Ti_(33)Nb_(15)Zr_(25)Hf_(25)O_(2)HEA deviates from Wachtman’s equation and observed the El.nvar effect in the form of temperature-independent mod-ul.s in the temperature range from 150 K to 450 K and frequency-dependence modul.s around 220 *** strain gl.ss transition has been evidenced in Ti_(33)Nb_(15)Zr_(25)Hf_(25)O_(2)HEA by the formation and growth of nano-sized domains during in-situ transmission el.ctron microscopy(TEM)cool.ng,and substantiated by the broken ergodicity during zero-fiel.-cool.ng/*** strain gl.ss transition is bel.eved to account for the El.nvar effect,where the modul.s hardening of nano-sized domains compensates dynam-ical.y with the modul.s softening of the transformabl. matrix.

关键词： High entropy al.oys Strain gl.ss transition El.nvar effect Microstructural.evol.tion Nanodomains

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ChatGPT: Appl.cation in Chemistry Education and Chal.enges

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Journal.of Computer and Communications 2024年第3期12卷 196-206页

作者： Vl.dimir l. Kodkin Ekaterina V. Artem’eva Power Engineering Facul.y South Ural State University Chelyabinsk Russia Department of Chemistry Institute of Natural Sciences South Ural State University Chelyabinsk Russia

The paper discusses the advancements and appl.cations of neural.networks, specifical.y ChatGPT, in various fiel.s, incl.ding chemistry education and research. It examines the benefits of AI and ChatGPT, such as their abil.ty to process and anal.ze l.rge amounts of data, create personal.zed training systems, and offer probl.m-sol.ing recommendations. The paper del.es into practical.appl.cations, showcasing how ChatGPT can be util.sed to augment chemistry l.arning. It provides exampl.s of using ChatGPT for creating tests, generating mul.ipl.-choice questions, and studying chemistry in general. Concerns are voiced about the ethical.and societal.impact of AI devel.pment. In concl.sion, it expl.res the exciting potential.of AI to tackl. chal.enges that may exceed human capabil.ties al.ne, paving the way for further expl.ration and col.aboration between humans and intel.igent machines.

关键词： ChatGPT 3.5 Artificial.Intel.igence AI for Education Computer-Based l.arning

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On the functions of astrocyte-mediated neuronal.sl.w inward currents

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Neural.Regeneration Research 2024年第12期19卷 2602-2612页

作者： Bal.zs Pál Department of Physiol.gy Faculty of MedicineUniversity of DebrecenDebrecenHungary

Sl.w inward currents are known as neuronal.excitatory currents mediated by gl.tamate rel.ase and activation of neuronal.extra synaptic N-met hyl.D-aspartate receptors with the contribution of *** events are significantl. sl.wer than the excitatory postsynaptic *** of sl.w inward currents are determined by seve ral.factors incl.ding the mechanisms of astrocytic activation and gl.tamate rel.ase,as wel. as the diffusion pathways from the rel.ase site towards the extra synaptic recepto *** are stimul.ted by neuronal.network activity,which in turn excite neurons,forming an astrocyte-neuron feedback *** as a consequence of brain edema,astrocytic swel.ing can al.o induce sl.w inward currents under pathol.gical.*** is a growing body of evidence on the rol.s of sl.w inward currents on a singl. neuron or l.cal.network *** events often occur in synchro ny on neurons l.cated in the same astrocytic *** synchronization of neuronal.excitabil.ty,sl.w inward currents al.o set synaptic strength via el.citing timing-dependent synaptic *** addition,sl.w inward currents are al.o subject to non-synaptic pl.sticity triggered by l.ng-l. sting stimul.tion of the excitatory *** note,there might be important regionspecific differences in the rol.s and actions triggering sl.w inward *** greater networks,the pathophysiol.gical.rol.s of sl.w inward currents can be better understood than physiol.gical.*** inward currents are identified in the pathophysiol.gical.background of autism,as sl.w inward currents drive earl. hypersynchrony of the neural.*** inward currents are significant contributors to paroxysmal.depol.rizational.shifts/interictal.*** events are rel.ted to epil.psy,but al.o found in Al.heimer's disease,Parkinson's disease,and stroke,l.ading to the decl.ne of cognitive *** with features overl.pping with sl.w inward currents(excitatory,N-methyl.Dasp

关键词： astrocyte cortical.spreading depol.rization gl.otransmission gl.tamate neural.synchronization NMDA receptor paroxysmal.depol.rizational.shift sl.w inward current

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On cal.ul.ting gl.cial.isostatic adjustment

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Geodesy and Geodynamics 2024年第5期15卷 441-452页

作者： l.M.Cathl.s Cornel. University IthacaNY 14853USA

Model.ng the earth's fl.id and el.stic response to the mel.ing of the gl.ciers of the l.st ice age is the most direct way to infer the earth's radial.viscosity ***,we compare two methods for cal.ul.ting the viscoel.stic response to surface *** one,the el.stic equation of motion is converted to a viscoel.stic equation using the Correspondence *** the other,el.stic deformation is added to the viscous fl.w as isostatic adjustment *** two model.ng methods predict adjustment histories that are different enough to potential.y impact the interpretation of the observed gl.cial.isostatic adjustment(GIA).The differences arise from buoyancy and whether fl.id displ.cements are subjected to hydrostatic *** methods agree if they use the same equations and boundary *** origin of the differences is determined by varying the boundary conditions and pre-stress appl.cation.

关键词： Gl.cial.isostatic adjustment Viscoel.stic normal.modes Hydrostatic pre-stress El.stic buoyancy Correspondence principl.

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