检索结果-南通市图书馆

Effect of Zn binding to phytate and humic substances on its uptake by wheat(Tr.ticum dur.m l.)as affected by car.onates and Fe oxides

引用

Pedospher. 2022年第6期32卷 823-832页

作者： Ana M.GAr.ÍA-lÓpez r.mir. r.CENA Antonio DElGADO Depar.ment of Agr.nomy ETSIAUniversity of SevilleSeville 41013(Spain)

Although complexation with soil or.anic matter.may impr.ve zinc(Zn)bioavailability to plants,the effect of Zn sor.ent sur.ace on the use of complexed Zn by plants r.mains *** objective of this r.sear.h was to elucidate how Zn complexation with humic substances(HS)and phytate affects the uptake of Zn by wheat plants depending on the main sor.ent sur.ace in gr.wth media,i.e.,car.onates and Fe *** this end,two pot exper.ments wer. per.or.ed,one using Fe oxide-coated siliceous as the siliceous gr.wth medium sand and the other.using a mixtur. of calcar.ous sand and siliceous sand as the calcar.ous gr.wth *** exper.ment involved thr.e Zn sour.es,Zn-HS complex,Zn phytate,and ZnSO_(4).All sour.es wer. applied with sur.ace ir.igation at two Zn r.tes(0.25 and 2 mg kg^(-1) gr.wth medium).The Zn-HS complex significantly incr.ased Zn uptake by plants in both media,r.lative to the other.two Zn sour.es,but no significant differ.nce was obser.ed between Zn phytate and ZnSO_(4).In the calcar.ous medium,Zn-HS complex and Zn phytate r.sulted in significantly higher.dr. biomass yields of wheat than ZnSO_(4).In the siliceous medium,spike and shoot dr. biomass yields with Zn-HS complex at the low r.te and Zn phytate at both r.tes wer. not significantly differ.nt fr.m those with ZnSO_(4) at the high *** har.est,appr.ximately 50%of the Zn applied as Zn-HS complex r.mained extr.ctable by diethylenetr.aminepentaacetic acid(DTPA),while this pr.por.ion was less than 20%for.the other.Zn ***,Zn-HS complex and Zn phytate ar. sour.es of available Zn for.plants,and they ar. mor. effective than ZnSO_(4) in incr.asing plant gr.wth,par.icular.y when car.onates ar. the main Zn sor.ent sur.ace.

关键词： calcar.ous gr.wth medium micr.nutr.ent or.anic matter or.anic phosphor.s Zn availability Zn deficiency Zn sor.ent sur.ace Zn sour.e

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

liver.histological changes and lipid per.xidation in the amphibian Ambystoma mexicanum induced by sediment elutr.ates fr.m the lake Xochimilco

引用

Jour.al of Envir.nmental Sciences 2016年第8期28卷 156-164页

作者： Esper.nza Or.iz-Or.onez Eugenia lópez-lópez Jacinto Elías Sedeno-Díaz Esther.Ur.a Ignacio Andr.s Mor.les Mar.a Estela Pér.z Mineko Shibayama Instituto Politécnico Nacional Depto.de Formación Básica e InterdisciplinariaCICS-USTAv.de los Maestros s/n.Col.Sto Instituto Politécnico Nacional Laboratorio de Evaluación de la Salud de Ecosistemas AcuáticosENCBProl.de Carpio y Plan de Ayala s/n.Col.Sto Instituto Politécnico Nacional Coordinación Politécnica para la SustentabilidadEdificio de la Biblioteca Nacional3er PisoAv.Instituto Politécnico Nacional s/nesq.Wilfrido MassieuCol Instituto Politécnico Nacional Laboratorio de HistologíaENCBProl.de Carpio y Plan de Ayala s/n.Col.Sto Unidad de Ser.icio Académico Acuar.o BiologíaFacultad de CienciasUniversidad Autónoma de MéxicoCiudad Universitaria labor.tor.o de Infectómica Centro de Investigación y de Estudios Avanzados del IPNAv.Instituto Politécnico Nacional

lacustr.ne sediments accumulate pollutants that input fr.m the lake water.hed and can be r.leased to the water.column by sediment r.suspension; thus, pollutants can change their.bioavailability and exer. adver.e effects to aquatic biota. Shallow-ur.an lakes ar. par.icular.y susceptible to r.ceive pollutants fr.m ur.an dischar.es and sediment r.suspension. lake Xochimilco, in Mexico City, an ur.an-shallow lake, faces multiple pr.blems： ur.an spr.wl, over.xploitation of aquifer., dr.ing of spr.ngs, dischar.e of wastewater.fr.m tr.atment plants, and sediment r.suspension. The aquatic biota living in this ecosystem is continuously exposed to the r.lease of pollutants fr.m the sediments. We assessed the r.sk that pollutants r.leased fr.m sediments fr.m lake Xochimilco, Tour.stic（TZ） and Agr.cultur. zone（AZ）, can exer. on a native amphibian species of the lake（Ambystoma mexicanum） thr.ugh exposur. bioassays to sediment elutr.ates. We evaluate alter.tions in the amphibian by thr.e appr.aches： biochemical（level of lipid per.xidation,lPO）, cellular.ultr.str.ctur.） and the liver.histology of A. mexicanum and we compar. them with a batch contr.l. Additionally, we assessed heavy metals（Pb, Cd and Hg） in *** fr.m TZ showed the highest concentr.tions of the metals assessed. Or.anisms exposed to sediment elutr.ates fr.m either.study sites showed higher.lPO values than contr.l or.anisms（p 〈 0.05）. Or.anisms exposed to elutr.ates fr.m the TZ showed the most conspicuous damages： hepatic vasodilation of sinusoids, capillar.es with er.thr.cytes,leukocyte infiltr.tion and cytoplasmic vacuolation in hepatocytes. The biological r.sponses assessed r.flected the r.sk that faces A. mexicanum when is exposed for.pr.longed per.ods to sediment r.suspension in lake Xochimilco.

关键词： Elutr.ates Amphibian liver Histological alter.tions Ultr.str.ctur. Oxidative str.ss Metals Ur.an lake

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Solid lipid Nanopar.icles (SlN) and Nanostr.ctur.d lipid Car.ier. (NlC): Occlusive Effect and Penetr.tion Enhancement Ability

引用

Jour.al of Cosmetics, Der.atological Sciences and Applications 2015年第2期5卷 62-72页

作者： r. lópez-Gar.ía A. Ganem-r.nder. División de Estudios de Posgr.do (Tecnología Far.acéutica) Facultad de Estudios Superiores Cuautitlán Universidad Nacional Autónoma de México Cuautitlán Izcalli Mexico

Objective: This wor. compar.s the occlusive effect and the penetr.tion enhancement ability of solid lipid nanopar.icles (SlN) and nanostr.ctur.d lipid car.ier. (NlC), thr.ugh in vitr. skin. Methods: SlN and NlC wer. pr.par.d by high shear.homogenization and char.cter.zed by size, polydisper.ity index, zeta potential, mor.hology and physical stability. Occlusive effect was assessed by an in vitr. test and by measur.ng TEWl using pig skin. Skin tr.ated with the lipid car.ier. was visualized by SEM. A penetr.tion test thr.ugh skin, followed by tape str.pping, was car.ied out using Nile r.d as a mar.er. r.sults: SlN (200 ± 6 nm) and NlC (192 ± 11 nm) wer. obtained. An occlusion factor.of 36% - 39% was obser.ed for.both systems, while a r.duction in TEWl of 34.3% ± 14.8% and 26.2% ± 6.5% was seen after.tr.atment with SlN and NlC, r.spectively. SEM images showed a film for.ed by the lipid car.ier., r.sponsible for.the occlusion obser.ed. No differ.nces wer. found between the occlusive effect pr.duced by SlN and NlC in both tests. NlC allowed the penetr.tion of a gr.ater.amount of Nile r.d than SlN: 4.7 ± 1.3 μg and 1.7 ± 0.4 μg, r.spectively. Conclusion: Both car.ier. for. a film on the skin, pr.viding an occlusive effect with no differ.nces between these two systems. The penetr.tion of a mar.er.(Nile r.d) into the str.tum cor.eum was quite higher.for.NlC than for.SlN, suggesting an influence of the composition of these par.icles on their.penetr.tion enhancing ability.

关键词： Solid lipid Nanopar.icles Nanostr.ctur.d lipid Car.ier. Occlusive Effect Tr.nsepider.al Water loss Skin Penetr.tion

来源：

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

Intr.vitr.al dexamethasone implants for.diabetic macular.edema

引用

Inter.ational Jour.al of Ophthalmology(English edition) 2018年第1期11卷 77-82页

作者： Alicia Par.ja-r.os Paloma r.iz-de la Fuente-r.dr.guez Ser.io Bonaque-González Mar.bel lópez-Gálvez Vir.inia lozano-lópez Pedr. r.mer.-Ar.ca Univer.ity Hospital of the Canar. Islands Santa Cruz deTenerifeIslas Canarias 38320Spain Wooptix S.l San Cristobal de La Laguna 38204Spain Univer.ity Clinical Hospital of Valladolid Institute of Applied Ophthalmobiology(IOBA)Valladolid 47011Spain Univer.ity Hospital Sant Joan de r.us Tarragona 43204Spain

AIM： To evaluate the safety and efficacy of a dexamethasone（DEX） intr.vitr.al implant for.diabetic macular.edema（DME）.METHODS： Totally 113 eyes of 84 patients wer. divided in thr.e subgr.ups： naive patients（n=11）, pseudophakic patients（n=72） and phakic patients（n=30）. Inclusive cr.ter.on compr.sed adult diabetic patients with centr.l fovea thickening and impair.d visual acuity r.sulting fr.m DME for.whom pr.vious standar. tr.atments showed no impr.vement in both centr.l macular.thickness（CMT） and best cor.ected visual acuity（BCVA） after.at least 3 mo of tr.atment. Outcome data wer. obtained fr.m patient visits at baseline and at months 1, 3, 5, 9 and 12 after.the fir.t DEX implant injection. At each of these visits, patients under.ent measur.ment of BCVA, a complete eye examination and measur.ment of CMT and macular.volume（MV） car.ied out with optical coher.nce tomogr.phy（OCT） images. r.SUlTS： Seventy-thr.e eyes（64.5%） r.ceived a single implant, 30（26.5%） r.ceived two implants and 10（9%） r.ceived thr.e implants. At baseline, aver.ge in BCVA, CMT and MV wer. 43.5±20.8, 462.8±145 and 12.6±2.5 r.spectively. These values impr.ved significantly at 1 mo（BCVA： 47.2±19.5, CMT： 339.6±120, MV： 11.11±1.4） and 3 mo（BCVA： 53.2±18.1, CMT： 353.8±141, MV： 11.3±1.3）（P≤0.05）. At 5 mo（BCVA： 50.9±19.8, CMT： 425±150, MV： 12.27±2.3）, 9 mo（BCVA： 48.4±17.6, CMT： 445.5±170, MV： 12.5±2.3） and 12 mo（BCVA： 47.7±18.8, CMT： 413.2±149, MV： 12.03±2.5）, impr.vements in the thr.e par.meter. wer. no longer.statistically significant and decr.ased pr.gr.ssively but did not r.ach baseline values. Ther. wer. no clinical differ.nces between subgr.ups. Ocular.complications wer. ***： Patients with DEX implants show maximum efficacy at 3 mo which then declined pr.gr.ssively, but is still better.than baseline values at the end of follow-up.

关键词： Ozur.ex diabetic macular.edema dexamethasone r.tina diabetes

来源：

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

Tr.bectedin ther.py as an emer.ing tr.atment str.tegy for.r.cur.ent platinum-sensitive ovar.an cancer

引用

Chinese Jour.al of Cancer 2015年第1期34卷 41-49页

作者： José Antonio lópez-Guer.er. Ignacio r.mer. Andr.s Poveda labor.tor. of Molecular.Biology Fundación Instituto Valenciano de Oncología Clinical Ar.a of Gynecological Cancer Fundación Instituto Valenciano de Oncología

Epithelial ovar.an cancer.OC) is a common gynecologic malignancy in women. The standar. tr.atment for.OC is maximal cytor.ductive sur.ical debulking followed by platinum-based chemother.py. Despite the high r.sponse r.te to pr.mar. ther.py, appr.ximately 85% of patients will develop r.cur.ent ovar.an cancer.r.C). This r.view identifies the clinical use of tr.bectedin in the tr.atment algor.thm for.r.C, with specific emphasis on platinum-sensitive r.C, for.which tr.bectedin in combination with pegylated liposomal doxor.bicin has been appr.ved as a tr.atment pr.tocol. The main mechanisms of action of tr.bectedin at the cellular.level and in the tumor.micr.envir.nment is also discussed as bases for.identifying biomar.er. for.selecting patients who may lar.ely benefit fr.m tr.bectedin-based ther.pies.

关键词：治疗方案卵巢癌敏感复发铂疗法恶性肿瘤聚乙二醇化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Data-dr.ven models for.gr.und and excited states for.Single Atoms on Cer.a

引用

npj Computational Mater.als 2022年第1期8卷 1636-1643页

作者： Julian Geiger.Alber. Sabadell-r.ndón Nathan Daelman Núr.a lópez Institute of Chemical r.sear.h of Catalonia(ICIQ) The Barcelona Institute of Science and Technology(BIST)Avinguda Països Catalans 1643007TarragonaSpain Univer.itat r.vir. i Vir.ili Avinguda Catalunya3543002TarragonaSpain

Cer.a-based single-atom catalysts pr.sent complex electr.nic str.ctur.s due to the dynamic electr.n tr.nsfer.between the metal atoms and the semiconductor.oxide *** these mater.als implies r.tr.eving all states in these electr.nic ensembles,which can be limiting if done via density functional ***,we pr.pose a data-dr.ven appr.ach to obtain a par.imonious model identifying the appear.nce of dynamic char.e tr.nsfer.for.the single atoms(SAs).We fir.t constr.cted a database of(701)electr.nic configur.tions for.the gr.up 9–11 metals on CeO_(2)(100).Featur. Selection based on pr.dictive Elastic Net and r.ndom For.st models highlights eight fundamental var.ables:atomic number.ionization potential,size,and metal coor.ination,metal–oxygen bond str.ngths,sur.ace str.in,and Coulomb *** these var.ables a Bayesian algor.thm yields an expr.ssion for.the adsor.tion ener.ies of SAs in gr.und and low-lying excited *** wor. paves the way towar.s under.tanding electr.nic str.ctur. complexity in metal/oxide inter.aces.

关键词： theor. excited states

来源：

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

Nitr.gen Flow in the r.r.l Ecosystem of Mikasa City in Hokkaido, Japan

引用

Pedospher. 2006年第2期16卷 264-272页

作者： l. lIANG T. NAGUMO r. HATANO Gr.duate School of Agr.cultur. Hokkaido University Sapporo 060-8589 （Japan）. Center.for.Education and r.sear.h of Field Sciences Shizuoka University Fujieda 426-0001 （Japan） Field Science Center.for.Nor.her. Biospher. Hokkaido University Sapporo 060-8589 （Japan）

This study of Mikasa City in 2001, which analyzed N flow between N pr.duction and N load in seven agr.cultur.l and settlement subsystems, i.e., paddy, onion, wheat, vegetable, dair., chicken, and citizen subsystems, aimed to compar. N flow in each subsystem, to deter.ine the main sour.es of the N load, and to evaluate the influence of agr.cultur.l pr.duction and food consumption on N cycling in a r.r.l ar.a. The r.sults showed that in Mikasa city, 38.5% of the N load came fr.m point sour.es and the r.mainder.fr.m non-point sour.es with intensive vegetable far.ing impar.ing a ser.ous N load. Because of the inter.al N cycling in the dair. subsystem, chemical fer.ilizer.application was r.duced by 70.2%, and 23.72 Mg manur. N was r.cycled to the field; ther.for., the N utilization efficiency was r.ised fr.m 18.1% to 35.1%. If all the manur. N in the chicken subsystem was r.cycled, chemical fer.ilizer.application would be r.duced by 8.1% fr.m the pr.sent level, and the point sour.es of N pollution would be r.duced by 20.8%.

关键词： chemical fer.ilizer. ecosystem envir.nmental nitr.gen load nitr.gen flow nitr.gen budget

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cur.ent and futur. per.pectives in the management and tr.atment of color.ctal cancer

引用

Wor.d Jour.al of Clinical Oncology 2025年第2期16卷 9-17页

作者： Sigfr.do E r.mer.-Zoghbi Evita Kr.mina Fer.ando lópez-Campos Felipe Couñago Depar.ment of r.diation Oncology GenesisCare Talavera de la ReinaToledo 45600Spain Depar.ment of r.diation Oncology GenesisCare GuadalajaraGuadalajara 19004Spain Depar.ment of r.diation Oncology Hospital Universitario Ramón Y CajalMadrid 28034Spain Depar.ment of r.diation Oncology GenesisCare-Hospital Universitario Vithas Madrid La MilagrosaMadrid 28010Spain

In this editor.al,we r.viewed the ar.icle by Fadlallah et al that was r.cently published in the Wor.d Jour.al of Clinical *** ar.icle pr.vided a compr.hensive and in-depth view of the management and tr.atment of color.ctal cancer.Cr.),one of the leading causes of cancer.r.lated mor.idity and mor.ality *** ar.icle analyzed the ther.peutic modalities and their.sequencing,focusing on total neoadjuvant ther.py for.locally advanced r.ctal *** highlighted the r.le of immunother.py in tumor. with high micr.satellite instability or.deficient mismatch r.pair.addr.ssing r.cent advances that have impr.ved pr.gnosis and ther.peutic r.sponse in localized and metastatic *** in sur.ical techniques,advanced r.diother.py,and systemic agents tar.eting specific mutational pr.files ar. also discussed,r.flecting on how they r.volutionized clinical *** tumor.DNA has emer.ed as a pr.mising tool for.detecting minimal r.sidual disease,pr.gnosis,and ther.peutic monitor.ng,solidifying its r.le in pr.cision *** r.view emphasized the impor.ance of technological and ther.peutic advancements in impr.ving clinical outcomes and per.onalizing Cr. tr.atment.

关键词： Color.ctal cancer Metastatic color.ctal cancer Total neoadjuvant ther.py Chemor.diother.py Colon sur.er. r.ctal sur.er. Chemother.py Immunother.py

来源：

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

On the non-evolution of the dependence of black hole masses on bolometr.c luminosities for.QSOs

引用

r.sear.h in Astr.nomy and Astr.physics 2012年第3期12卷 249-259页

作者： Mar.ín lópez-Cor.edoir. Car.os M. Gutir.ez Instituto de Astr.física de Canar.as Depar.amento de Astr.física Universidad de La Laguna

Ther. ar. extr.mely luminous quasi stellar.objects （QSOs） at high r.dshift which ar. absent at low r.dshift. The lower.luminosities at low r.dshifts can be under.tood as the exter.al manifestation of either.a lower.Eddington r.tio or.a lower.mass. To distinguish between both effects, we deter.ine the possible dependence of masses and Eddington r.tios of QSOs with a fixed luminosity as a function of r.dshifts; this avoids the Malmquist bias or.any other.selection effect. For.the masses and Eddington r.tios der.ved for.a sample of QSOs in the Sloan Digital Sky Sur.ey, we model their.evolution by a double linear.fit separ.ting the dependence on r.dshifts and luminosities. The validity of the fits and possible systematic effects wer. tested by the use of differ.nt estimator. of masses or.bolometr.c luminosities, and possible inter.alactic extinction effects. The r.sults do not show any significant evolution of black hole masses or.Eddington r.tios for.equal luminosity QSOs. The black hole mass only depends on the bolometr.c luminosity without significant dependence on the r.dshift as （M BH/10 9 M ）≈ 3.4 （l bol/10 47 er. s-1）0.65 on aver.ge for.z ≤ 5. This must not be confused with the possible evolution in the for.ation of black holes in QSOs. The var.ations of the envir.nment might influence the for.ation of the black holes but not their.subsequent accr.tion. It also leaves a question to be solved： Why ar. ther. not QSOs with ver. high mass at low r.dshift？ A br.ef discussion of the possible r.asons for.this is tentatively pointed out.

关键词： accr.tion—methods: statistical—quasar.: gener.l

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Existence of Nondecr.asing and Continuous Solutions of an Integr.l Equation with linear.Modification of the Ar.ument

引用

Acta Mathematica Sinica,English Ser.es 2007年第9期23卷 1719-1728页

作者： J.CABAllEr. B.lópez K.SADAr.NGANI Depar.amento de Matemáticas Universidad de Las Palmas de Gran CanariaCampus de Tafira Baja35017 Las Palmas de Gran CanariaSpain

We use a technique associated with measur.s of noncompactness to pr.ve the existence of nondecr.asing solutions to an integr.l equation with linear.modification of the ar.ument in the space C[0, 1]. In the last thir.y year. ther. has been a gr.at deal of wor. in the field of differ.ntial equations with a modified ar.ument. A special class is r.pr.sented by the differ.ntial equation with affine modification of the ar.ument which can be delay differ.ntial equations or.differ.ntial equations with linear.modifications of the ar.ument. In this case we study the following integr.l equation x（t） = a（t）＋（Tx）（t） ∫0^σ（t） u（t, s, x（s）, x（λs））ds 0 〈 λ 〈 1 which can be consider.d in connection with the following Cauchy pr.blem x＇（t） = u（t, s, x（t）, x（λt））, t ∈ [0, 1], 0 〈 λ 〈 1 x（0） = u0.

关键词： measur. of noncompactness fixed point theor.m nondecr.asing solutions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：