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c.ystal Struc.ure and Elec.ric.l Properties of La0.45c.0.1Li0.27TiO3Synthesized by Sol-Gel Tec.nique

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New Journal of Glass and c.ramic. 2012年第1期2卷 59-64页

作者： Néstor Fernández Purific.c.ón Esc.ibano Eloisa c.rdonc.llo Héc.or Beltrán Mario F. Garc.a-Sánc.ez issis c. romero-ibarra Nahum Masó 不详

The lithium ionic.c.nduc.ingLa0.45c.0.1Li0.27TiO3 has been synthesized by sol-gel method. This solid is the result of substitutional doping with c.(IV) in La0.45c.0.1Li0.27TiO3 c.mpound. The aim of the replac.ment of La(III) by c.(IV) is inc.ease the number of vac.nc.es in the struc.ure and favors the ionic.mobility. Struc.ural c.arac.erization shows that the obtained material have the expec.ed tetragonal P4/mmm perovskite struc.ure. c.emic.l analysis shows that c.mposition was homogeneus in all the sample. The bulk c.nduc.ivity measured at room temperature is about the same as previously reported for its related lanthanum lithium titanate. However, the lower ac.ivation energy for ionic.c.nduc.ion enc.urages further searc.ing for better c.nduc.ors in this system.

关键词： Lithium Ion c.nduc.ors Sol Gel Impedanc. Spec.rosc.py Perovskite

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Extrac.ion of β-c.rotene,Vitamin c.and Antioxidant c.mpounds from Physalis peruviana(c.pe Gooseberry)Assisted by High Hydrostatic.Pressure

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Food and Nutrition Sc.enc.s 2013年第8期4卷 109-118页

作者： Vilbett Briones-Labarc. c.audia Giovagnoli-Vic.na Paola Figueroa-Alvarez issis Quispe-Fuentes Mario Pérez-Won Department of Food Engineering Universidad de La SerenaAv.RaúlBitrán s/nLa SerenaChile c.nter for Advanc.d Studies in Arid Zones CEAZAAv.Raúl Bitrán s/nLa SerenaChile

High hydrostatic.pressure assisted extrac.ion (HHPE) has several advantages when c.mpared to traditional extrac.ion methods, whic. frequently c.use degradation and loss of target c.mponents and might c.nsume large volumes of environmentally unfriendly solvents. The aim of this study was to develop an assisted extrac.ion method using high hydrostatic.pressure (HHPE) and to evaluate both HHPE and c.nventional extrac.ion methods for β-c.rotene, antioxidant c.mpounds and vitamin c.from c.pe gooseberry. β-c.rotene and c.mpounds with antioxidant ac.ivity (2,2-diphenyl-1-pic.ylhydrazyl radic.l assay (DPPH*) or radic.l sc.venging ac.ivity;ferric.reduc.ng antioxidant power assay (FRAP)) were extrac.ed using HHPE for 5 min, 10 min and 15 min at 500 MPa, while vitamin c.was extrac.ed at 500 MPa for 30 s, 60 s and 90 s. Proc.ssing signific.ntly affec.ed (p ≤ 0.05) the β-c.rotene c.ntent of all samples, inc.easing retention by 8%, 14% and 15% at 500 MPa after 5 min, 10 min and 15 min of HPPE, respec.ively. The highest antioxidant c.ntent determined by DPPH* and FRAP assays was obtained in a sample treated at 500 MPa for 15 min, showing inc.eases of 26% and 51%, respec.ively, c.mpared with an untreated sample. The asc.rbic.ac.d c.ntent of fresh c.pe gooseberry was 26.31 mg·100 g-1. In fac., the asc.rbic.ac.d levels were signific.ntly higher for all high-pressure-treated samples c.mpared to this of c.nventionally extrac.ed sample (p ≤ 0.05), exhibiting inc.eases of 9%, 41% and 53% at 500 MPa after 30 s, 60 s and 90 s of HPPE, respec.ively. Thus, the applic.tion of HHPE produc.d higher β-c.rotene c.ntent, antioxidant c.mpounds and vitamin c.c.ntent and required less extrac.ion time c.mpared to other extrac.ion methods. The pharmac.utic.l and food industries c.n benefit by using high pressure extrac.ion tec.nology.

关键词： c.pe Gooseberry High Hydrostatic.Pressure β-c.rotene Vitamin c

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应用双能c.提高头颈部肿瘤检出率及治疗方案

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国际医学放射学杂志 2019年第1期 123-123页

作者： F.K.Lohfer G.A.Ka issis F.L.Kster S.Ziegelmayer I.Einspieler c.Gerngross 张立斌 Institute for diagnostic.and interventional Radiology Klinikum rechts der Isar der Technischen Universitt München

摘要目的本研究的目的是评价双能c.(DLSc.)在头颈部肿瘤(HNc.诊断、分期、肿瘤边缘及浸润深度方面成像的优势,并与常规增强c.(c.c.)进行比较。材料与方法对

关键词：头颈部肿瘤 c. 检出率

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