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| 1 | An Andean tectonic cycle:From crustal thickening to extension in a thin crust(34°-37°SL)显示文摘Several orogenic cycles of mountain building and subsequent collapse associated with periods of shallowing and steepening of subduction zones have been recognized in recent years in the Andes.Most of them are characterized by widespread crustal delamination expressed by large calderas and rhyolitic flare-up produced by the injection of hot asthenosphere in the subduction wedge.These processes are related to the increase of the subduction angle during trench roll-back.The Payenia paleoflat-slab,in the southern Central Andes of Argentina and Chile(34°—37°S) recorded a complete cycle from crustal thickening and mountain uplift to extensional collapse and normal faulting,which are related to changes in the subduction geometry.The early stages are associated with magmatic expansion and migration,subsequent deformation and broken foreland.New ages and geochemical data show the middle to late Miocene expansion and migration of arc volcanism towards the foreland region was associated with important deformation in the Andean foothills.However,the main difference of this orogenic cycle with the previously described cycles is that the steepening of the oceanic subducted slab is linked to basaltic flooding of large areas in the retroarc under an extensional setting.Crustal delamination is concentrated only in a narrow central belt along the cordilleran axis.The striking differences between the two types of cycles are interpreted to be related to the crustal thickness when steepening the subducting slab.The crustal thickness of the Altiplano is over 60-80 km,whereas Payenia is less than 42 km in the axial part,and near 30 km in the retroarc foothills.The final extensional regime associated with the slab steepening favors the basaltic flooding of more than 8400 km^3 in an area larger than 40,000 km2,through 800 central vents and large fissures.These characteristics are unique in the entire present-day Andes. | Victor A.Ramos Vanesa D.Litvak Andrés Folguera Mauro Spagnuolo | 2014 | Geoscience Frontiers2014，5，3： | 2 |
| 2 | Analysis of C‐glycosyl Flavonoids from South American Passiflora Species by HPLC‐DAD and HPLC‐MS显示文摘 | Silvana MariaZucolotto CarizeFagundes Flávio HenriqueReginatto Freddy A.Ramos LeonardoCastellanos CarmenzaDuque Eloir PauloSchenkel | 2012 | Phytochem. Anal2012，，3： | 1 |
| 3 | 南美晚元古-早古生代板块碰撞史显示文摘南美南部是晚前寒武纪-早古生代,沿冈瓦那大陆西南部边缘克拉通化地块的复杂拼接体。现代大量的工作,尤其阿根廷和智利北部的调查研究,已形成许多新的概念和模式。文章通过这些工作探讨本区板块相互作用及其造山旋回的发展历史。 | Victor A.Ramos 修群业 | 1989 | 地质调查与研究1989，24，3： | 0 |
| 4 | 交流电场作用下具有导电率梯度的两相微流体驱动显示文摘为探讨微通道内多相流体驱动路径的控制方法,进行具有导电率梯度的交流电场致两相流体驱动实验,对沉积在微通道底部的指型交叉电极施加交流电信号,发现具有高导电率的流体会将低导电率流体挤出通道,并且占据整个通道,当不加电信号时,两相流体流动路径恢复初始状态.建立实验系统的二维理论模型,对两相流体交界面处由于电场与导电率梯度综合作用产生的净电荷和库仑力进行了推导,分析实验机理.利用电荷守恒方程、对流扩散方程以及Navier-Stokes方程对实验进行数值分析,通过仿真求解,得出微通道内流体的瞬时以及稳态变化规律,并重点分析频率对于两相流体控制过程的影响.结果表明:通过合理配制两相流体的导电率梯度,施以交流电场,能够有效控制两相微流体的流动路径,能够实现芯片在实验室系统中的多模块集成. | 姜洪原 任玉坤 A.Ramos | 2011 | 哈尔滨工业大学学报2011，43，2： | 0 |
| 5 | Robust and conductive hydrogel based on mussel adhesive chemistry for remote monitoring of body signals显示文摘There is a high demand for hydrogels with multifunctional performance(a combination of adhesive,mechanical,and electrical properties)in biological,tissue engineering,robotics,and smart device applications.However,a majority of existing hydrogels are relatively rigid and brittle,with limited stretchability;this hinders their application in the emerging field of flexible devices.In this study,cheap and abundant potato residues were used with polyacrylamide(PAM)to fabricate a multifunctional hydrogel,and chitosan was used for the design of a three-dimentional(3D)network-structured hydrogel.The as-prepared hydrogels exhibited excellent stretchability,with an extension exceeding 900%and a recovery degree of over 99%.Due to the combination of physical and chemical cross-linking properties and the introduction of dopamine,the designed hydrogel exhibits a remarkable self-healing ability(80%mechanical recovery in 2 h),high tensile strength(0.75 MPa),and ultra-stretchability(900%).The resultant products offer superior properties compared to those of previously reported tough and self-healing hydrogels for wound adhesion.Chitosan and potato residues were used as scaffold materials for the hydrogels with excellent mechanical properties.In addition,in vitro experiments show that these hydrogels feature excellent antibacterial properties,effectively hindering the reproduction of bacteria.Moreover,the ternary hydrogel can act as a strain sensor with high sensitivity and a gauge factor of 1.6.The proposed strategy is expected to serve as a reference for the development of green and recyclable conductive polymers to fabricate hydrogels.The proposed hydrogel can also act as a suitable strain sensor for bio-friendly devices such as smart wearable electronic devices and/or for health monitoring. | Weijun LI Hao LIU Yuanyuan MI Miaoran ZHANG Jinmiao SHI Ming ZHAO Melvin A.RAMOS Travis Shihao HU Jianxiong LI Meng XU Quan XU | 2022 | Friction2022，10，1： | 0 |
| 6 | Payenia Quaternary flood basalts(southern Mendoza, Argentina):Geophysical constraints on their volume显示文摘The Quaternary volcanic province of Payenia is located in southern Mendoza and northern Neuquén provinces of Argentina and is characterized by a dominant basaltic composition. The volcanic province covers an area larger than 40,000 km2 and its origin and evolution has been the center of several studies.In this study we analyzed gravity data together with more accurate volcanic volumes calculations in order to investigate the subsurface structure of the Payenia volcanic province. The volume of material was calculated using digital elevation models and geographic information system(GIS) techniques to estimate the volume of material erupted and then, with those values, make an estimation of the intrusive material that could be located within the crust. The results of the calculations were compared with different 2D-sections constructed to model the gravity data and compare with the observed satellite gravity. After evaluating different models which have been generated to match both: the observed gravity data and the subsurface material calculated, we discuss those that best fit with observation. The results clearly indicate that the lithosphere is attenuated below the region. | Mauro G.Spagnuolo Darío L.Orts Mario Gimenez Andres Folguera Victor A.Ramos | 2016 | Geoscience Frontiers2016，7，5： | 0 |
| 7 | Charmed hadrons in nuclear medium显示文摘We study the properties of charmed hadrons in dense matter within a coupled-channel approach which accounts for Pauli blocking effects and meson self-energies in a self-consistent manner.We analyze the behaviour in this dense environment of dynamically-generated baryonic resonances as well as the open-charm meson spectral functions.We discuss the implications of the in-medium properties of open-charm mesons on the D s0 (2317) and the predicted X(3700) scalar resonances. | L.Tolos D.Gamermann C.Garcia-Recio R.Molina J.Nieves E.Oset A.Ramos | 2010 | Chinese Physics C2010，34，9： | 0 |
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