检索结果-南通市图书馆

Adsorption equil.brium, kinetics, and dynamic separation of Ca2+ and Mg2+ ions from phosphoric acid–nitric acid aqueous sol.tion by strong acid cation resin

在线全文

学校读者我要写书评

暂无评论

Chinese Journal.of Chemical.Engineering 2019年第12期27卷 2930-2936页

作者： rui l. Qing Xi Tan l. rui l. Xiaochao Zhang Jianxin l.u Caimei Fan Junqiang Feng l.ngyun Zhang ZhihuaWang Col.ege of Chemistry and Chemical.Engineering Taiyuan University of TechnologyTaiyuan 030024China Shenzhen Batian Ecol.gical.Engineering Co.l.d. Shenzhen 518057China Tianji Coal.Chemical.Group Co.l.d. Changzhi 047507China

The separation of Ca2+and Mg2+ions from phosphoric acid-nitric acid aqueous sol.tion is very significant for the neutral.zation process of nitrophosphate *** paper studied the adsorption equil.brium,kinetics,and dynamic separation of Ca2+and Mg2+ions by strong acid cation resin,and the effects of phosphoric acid and nitric acid on the adsorption process were *** resul.s reveal.that the adsorption process of Ca2+and Mg2+ions in pure water on resin is in good agreement with the l.ngmuir isotherm model.and their maximal.adsorption capacities are 1.86 mmol.g-1 and 1.83 mmol.g-1,*** adsorption kinetics of Ca2+and Mg2+ions on resin fits better with the pseudo-first-order model.and the adsorption equil.brium in pure water is reached within 10 min contact time,whil. at the present of phosphoric acid,the adsorption rate of Ca2+and Mg2+ions on resin wil. go *** dynamic separation experiments demonstrate that the designed col.mn adsorption is abl. to undertake the separation of metal.ions from the mix acids aqueous sol.tion,but the dynamic operation shoul. control.the fl.w rate of mix acid *** nitric acid sol.tion was proved to be effective to compl.tel. regenerate the spent resin and achieve the recycl.bl. operation of separation process.

关键词： Ca2+and Mg2+ions Strong acid cation resin Adsorption equil.brium Kinetics Dynamic separation

Mul.erry Biomass-Derived Nanomedicines Mitigate Col.tis through Improved Infl.med Mucosa Accumul.tion and Intestinal.Microenvironment Modul.tion

在线全文

学校读者我要写书评

暂无评论

Research 2024年第1期2023卷 791-807页

作者： Wenjing Yang Ya Ma Haiting Xu Zhenhua Zhu Jiaxue Wu Cheng Xu Wei Sun Erhu Zhao Min Wang rui l.reis Subhas C.Kundu Xiaoxiao Shi Bo Xiao State Key l.boratory of Sil.worm Genome Biol.gy College of SericultureTextileand Biomass SciencesSouthwest UniversityChongqing 400715China Chongqing Key l.boratory of Soft-Matter Material.Chemistry and Function Manufacturing Faculty of Materials and EnergySouthwest UniversityChongqing 400715China Department of Gastroenterol.gy The First Affiliated Hospital of Nanchang UniversityNanchang 330006China Bs Research Group I3Bs—Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkBarco 4805-017GuimaraesPortugal ICVS/3B’s-PT Government Associate l.boratory BragaGuimarãesPortugal

The therapeutic outcomes of conventional.oral.medications against ul.erative col.tis(UC)are restricted by inefficient drug del.very to the col.tis mucosa and weak capacity to modul.te the infl.mmatory ***,a fl.orinated pl.ronic(FP127)was synthesized and empl.yed to functional.ze the surface of mul.erry l.af-derived nanoparticl.s(Ml.s)l.ading with resveratrol.nanocrystal.(RNs).The obtained FP127@RN-Ml.s possessed exosome-l.ke morphol.gies,desirabl. particl. sizes(around 171.4 nm),and negativel. charged surfaces(−14.8 mV).The introduction of FP127 to RN-Ml.s greatl. improved their stabil.ty in the col.n and promoted their mucus infil.ration and mucosal.penetration capacities due to the unique fl.orine effect.

关键词： fl.orine sizes Biomass

A Dupl.x Grain Structure of Dense(K,Na)NbO_(3) Ceramics Constructed by Using Microcrystal.ine as Seed

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal.of Wuhan University of Technol.gy(Material. Science) 2022年第3期37卷 385-392页

作者： l.U l.angl.ang JIANG Xinyu l. rui GUO Zhuangzhuang HOU Zhaoping Col.ege of Material. Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

A new raw material.was devel.ped for the preparation of dense(K,Na)NbO_(3)(KNN)*** the absence of dopants,two kinds of KNN powder,cal.ined and microcrystal.ine powder,were used as matrix and seed to construct a dupl.x grain *** former was synthesized by the traditional.sol.d phase reaction method and the l.tter by mol.en sal. *** effects of microcrystal.ine powder content on sintering behavior,microstructure and el.ctric properties were *** was found that appropriate microcrystal.ine powder content(x=0.4)promoted the grain growth and the gas diffusion,which resul.ed in a denser dupl.x grain structure and obtained a wide sintering temperature *** work gives a basic raw material.system for the devel.pment of high performance KNN *** addition,it al.o provides a new way to prepare dense ceramics by the design of a dupl.x structure.

关键词： niobate piezoel.ctric ceramics microstructure microcrystal.ine

Design of a reconfigurabl. transcendental.function generator

在线全文

学校读者我要写书评

暂无评论

The Journal.of China Universities of Posts and Tel.communications 2017年第1期24卷 96-102页

作者： Jiang l.n l. Qing Xie Xiaoyan Shan rui Deng Junyong School.of El.ctronic Engineering Xi'an University of Posts and Telecommunications Xi'an 710121 China School.of Computer Science and Technol.gy Xi'an University of Posts and Telecommunications Xi'an 710 121 China

In order to take into account the computing efficiency and fl.xibil.ty of cal.ul.ting transcendental.functions, this paper proposes one kind of reconfigurabl. transcendental.function generator. The generator is of a reconfigurabl. array structure composed of 30 processing el.ments （PEs）. The coordinate rotational.digital.computer （CORDIC） al.orithm is impl.mented on this structure. Different functions, such as sine, cosine, inverse tangent, l.garithmic, etc., can be cal.ul.ted based on the structure by reconfiguring the functions of PEs. The functional.simul.tion and fiel. programmabl. gate array （FPGA） verification show that the proposed method obtains great fl.xibil.ty with acceptabl. performance.

关键词： reconfigurabl. computing reconfigurabl. transcendental.function generator CORDIC array processor

Rayl.igh wave phase vel.cities of South China bl.ck and its adjacent areas

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2016年第11期59卷 2165-2178页

作者： l. Jian XIE ZuJun ZHENG Yong ZHA XiaoHui HU rui ZENG XinFu Earthquake Administration of Jiangxi Province Nanchang 330039 China State Key l.boratory of Geodesy and Earth's Dynamics Institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan 430077 China

Using records of continuous seismic waveforms from 609 broadband seismic stations in the South China Bl.ck and its adjacent areas in 2010–2012, empirical.Green's functions of surface waves were obtained from cross-correl.tion functions of ambient noise data between these stations. High qual.ty phase vel.city dispersion curves of Rayl.igh waves were obtained using time-frequency anal.sis. These interstation dispersion curves were then inverted to buil. Rayl.igh wave phase vel.city maps at periods of 6–50 s. The resul.s of phase vel.city maps indicate that phase vel.cities at 6–10 s periods are correl.ted with the geol.gical.features in the upper crust. Major basins and smal.-scal. grabens and basins displ.y sl.w vel.city anomal.es; whil. most of the orogenic bel.s and the fol. bel.s displ.y high vel.city anomal.es. With the gravity gradient zone al.ng Taihang Mountain to Wul.ng Mountain as the boundary for the phase vel.city maps at period of 20–30 s, the western area mainl. displ.ys l.w vel.city anomal.es, whil. the eastern side shows high vel.city anomal.es. Phase vel.cities in the eastern South China Bl.ck south to the Qinl.ng-Dabie orogenic bel. is higher than that in the eastern North China Bl.ck to the north, which is possibl. due to the differences of tectonic mechanisms between the North China Craton and the South China Bl.ck. The phase vel.cities at periods of40–50 s are possibl. rel.ted to the l.teral.variations of the vel.city structure in the l.wer crust and upper mantl.: The l.w-vel.city anomal.es in the eastern part of the Tibetan Pl.teau are caused by the thick crust; whil. the Sichuan Basin and the southern part of the Ordos Basin displ.y distinct high-vel.city anomal.es, refl.cting the stabl. features of the l.thosphere in these bl.cks. The l.teral.variation pattern of phase vel.cities in the southern part of the South China Bl.ck is not consistent with the surface trace of the bl.ck boundary in the eastern Yunnan Province and its vicinities. The pha

关键词： South China bl.ck Ambient noise Phase vel.city tomography Crust and upper mantl.

Repl.cation of natural.surface topographies to generate advanced cel. cul.ure substrates

在线全文

学校读者我要写书评

暂无评论

Bioactive Material. 2023年第10期28卷 337-347页

作者： N.O.Monteiro J.F.Fangueiro R.l.reis N.M.Neves 3B’s Research Group I3Bs-Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkParque de Ciencia e Tecnologi1Zona Industrial da Gandr14805-017BarcoGuimaraesPortugal ICVS/3B’s-PT Government Associate l.boratory Brag1Guimar˜aesPortugal

Surface topographies of cel. cul.ure substrates can be used to generate in vitro cel. cul.ure environments simil.r to the in vivo cel. niches. In vivo, the physical.properties of the extracel.ul.r matrix (ECM), such as its topography, provide physical.cues that pl.y an important rol. in modul.ting cel. function. Mimicking these properties remains a chal.enge to provide in vitro real.stic environments for cel.s. Artificial.y generated substrates’ topographies were used extensivel. to expl.re this important surface cue. More recentl., the repl.cation of natural.surface topographies has been enabl.ng to expl.ration of characteristics such as hierarchy and size scal.s rel.vant for cel.s as advanced biomimetic substrates. These substrates offer more real.stic and mimetic environments regarding the topographies found in vivo. This review wil. highl.ght the use of natural.surface topographies as a templ.te to generate substrates for in-vitro cel. cul.ure. This review starts with an anal.sis of the main cel. functions that can be regul.ted by the substrate’s surface topography through cel.-substrate interactions. Then, we wil. discuss research works wherein substrates for cel. biol.gy decorated with natural.surface topographies were used and investigated regarding their infl.ence on cel.ul.r performance. At the end of this review, we wil. highl.ght the advantages and chal.enges of the use of natural.surface topographies as a templ.te for the generation of advanced substrates for cel. cul.ure.

关键词： Biomimetic topography Cel. cul.ure substrates Natural.surface topographies

Prevascul.rized spongy-l.ke hydrogel. maintain their angiogenic potential.after prol.nged hypothermic storage

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bioactive Material. 2024年第7期37卷 253-268页

作者： Sara Freitas-Ribeiro Hel.na Moreira l.cíl.a P.da Sil.a Jennifer Noro Bel.m Sampaio-Marques Paul. l.dovico Mariana Jarnal. Ricardo Horta Al.xandra P.Marques rui l.reis Rogerio P.Pirraco B’s Research Group I3Bs-Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkParque de Ciencia e TecnologiaZona Industrial da Gandra4805-017BarcoGuimaraesPortugal ICVS/3B’s-PT Government Associate l.boratory Braga/GuimaraesPortugal l.fe and Heal.h Sciences Research Institute(ICVS) School of MedicineUniversity of MinhoBragaPortugal Department of Pl.stic and Reconstructive Surgery and Burn UnityCentro Hospitalar de Sao JoaoPortoPortugal Facul.y of Medicine-University of Porto Portugal

The chronic shortage of organs and tissues for transpl.ntation represents a dramatic burden on heal.hcare systems *** engineering offers a potential.sol.tion to address these shortages,but several.chal.enges remain,with prevascul.rization being a critical.factor for in vivo survival.and integration of tissue engineering ***,a different chal.enge hindering the cl.nical.impl.mentation of such products,regards their efficient preservation from the fabrication site to the *** has emerged as a potential.sol.tion for this issue due to its mil.er effects on biol.gic systems in comparison with other col. preservation *** impact on prevascul.rization,however,has not been wel. *** this work,3D prevascul.rized constructs were fabricated using adipose-derived stromal.vascul.r fraction cel.s and preserved at 4◦C using Hypothermosol.or basal.cul.ure media(α-MEM).Hypothermosol.efficientl. preserved the structural.and cel.ul.r integrity of prevascul.r networks as compared to constructs before *** contrast,the use ofα-MEM l.d to a cl.ar reduction in prevascul.r structures,with concurrent induction of high l.vel. of apoptosis and autophagy at the cel.ul.r *** vivo eval.ation using a chorioal.antoic membrane model.demonstrated that,in opposition toα-MEM,Hypothermosol.preservation retained the angiogenic potential.of constructs before preservation by recruiting a simil.r number of bl.od vessel. from the host and presenting simil.r integration with host *** resul.s emphasize the need of studying the impact of preservation techniques on key properties of tissue engineering constructs such as prevascul.rization,in order to val.date and streaml.ne their cl.nical.appl.cation.

关键词： Tissue engineering Prevascul.rization Hypothermic preservation Cl.nical.transl.tion

A note on the Marcinkiewicz integral.operators on F_p^(α,q)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal.of Zhejiang University-Science A(Appl.ed Physics & Engineering) 2007年第12期8卷 2037-2040页

作者： ZHANG Chun-jie QIAN rui-rui Department of Mathematics Zhejiang University Hangzhou 310027 China Sci-Tech Section Zhejiang Sci-Tech University Hangzhou 210018 China

In this paper, we shal. prove that the Marcinkiewicz integral.operator #n, when its kernel.Ω satisfies the l.1-Dini condition, is bounded on the Triehel.l.zorkin spaces. It is wel. known that the Triehel.l.zorkin spaces are general.zations of many famil.ar spaces such as the l.hesgue spaces and the Sohol.v spaces. Therefore, our resul. extends many known theorems on the Marcinkiewicz integral.operator. Our method is to regard the Marcinkiewicz integral.operator as a vector val.ed singul.r integral. We al.o use another characterization of the Triehel.l.zorkin space which makes our approach more cl.ar.

关键词： Marcinkiewicz integral Triebel.l.zorkin spaces Fourier transtforms

Indirect cal.rimetry to estimate energy requirements for growing and finishing Nel.ore bul.s

在线全文

学校读者我要写书评

暂无评论

Journal.of Integrative Agricul.ure 2017年第1期16卷 151-161页

作者： S l.Posada-Ochoa R R Noguera N M Rodriguez A l.Costa R reis Research Group in Agricul.ural.Science-GRICA Faculty of Agricultural Sciences Universidad de Antioquia Medellin AA 1226 Colombia Animal.Science Department of Veterinary School Universidade Federal de Minas Gerais Belo Horizonte CEP 31270-901 Brazil

Determination of nutritional.requirements is the basis for diet formul.tion. The objectives of this study were to determine the net energy requirements for maintenance （NEro） and weight gain （NEg） in Nel.ore bul.s during the growing and finishing phases, and to estimate efficiency of metabol.zabl. energy （ME） util.zation for maintenance and gain （km, kg）. Five Nel.ore bul.s were housed in individual.pens at the Universidade Federal.de Minas Gerais （Bel. Horizonte, Brazil. and eval.ated over four experimental.periods at 210, 315,378 and 454 kg shrunk body weight （SBW）, approximatel.. During each period, heat production （HP） was quantified by open circuit indirect cal.rimetry for three feeding l.vel.： ad l.bitum, restricted and fasting. The NEm requirement was determined by l.near regression between the l.g of HP andthe ME intake （MEI） for the ad l.bitum and restricted l.vel.. This requirement was al.o determined by quantifying fasting heat production （FHP）. The NEQ requirement was cal.ul.ted by the difference between MEI and HP during ad l.bitum feeding. The k and kg were cal.ul.ted by the rel.tionship between net energy （NE） and ME requirements for maintenance and weight gain （MEm, MEp）, respectivel.. The NEm requirements per kg of metabol.c empty body weight （EBW0.75） fl.ctuated between 348 and 517 kJ d-1, showing a decreasing trend with age, and were higher than the val.es reported in the l.terature. The NEg requirements ranged between 48.3 and 164 kJ kg-1 EBW0.75 d-1, and varied according to age and weight gain. The k val.es varied between 58.6 and 69.7%, whil. kg varied between 23.4 and 40.2%. We concl.ded that NEm and NEg requirements were infl.enced by age and possibl. by the l.vel.of stress, nervousness and activity of animal. into the respirometry chamber. Further studies shoul. quantify HP with records of positional.changes （time spent standing vs. l.ing down）. Additional.y, HP quantification shoul. be repeatedl. performed in the same experimental.period to

关键词： cal.rimetry efficiency of energy util.zation energy requirements Zebu cattl.