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74th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Indianapolis 2016

作者： Aumnate, Chuanchom Spicker, Claudia Kiesel, Raphael Samadi, Majid Rudolph, Natalie Mechanical Engineering Department Polymer Engineering Center University of Wisconsin-Madison WI United States Textile Science Department of Design Studies and Materials Science Graduate Program University of Wisconsin-Madison WI United States

ISBN: (纸本)9780692719619

Blending of plastics used in packaging is an interesting approach for recycling or upcycling. Therefore, this study focused on the effects of processing on the properties of recycled PP and PP/LDPE blends. MFI measurements, Differential Scanning Calorimetry (DSC) and hot-stage polarized optical microscopy techniques were used to investigate the miscibility of PP/LDPE blends based on the thermal properties, degree of crystallinity, crystallization and morphology development in the blends. The MFI indicates, that PP and PP/LDPE blends are marginally sensitive to degradation at common processing conditions. The degree of crystallinity of the blends decreases with an increase of the LDPE content. Furthermore, the spherulite growth rate and crystal size of PP decrease with an increase of LDPE content. The shifts of crystallization temperatures from the DSC measurement, in conjunction with the crystallization kinetics, indicate that PP/LDPE (25 wt% LDPE) is partially miscible.

关键词： Crystal structure

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COVID-19 pandemic exacerbated food insecurity in South American countries

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Food Security 2025年 1-22页

作者： Vasconcelos-Neto, Carlos Frederico A. Jacob, Michelle Tregidgo, Daniel Valle, Denis El Bizri, Hani R. Gomes, Sávio Marcelino Fa, Julia E. Morcatty, Thais Q. Monteiro, Frederico Ozanan Barros Scofield, Alessandra Matte, Alessandra Chaves, Willandia A. Borges, Luiz Henrique Medeiros Silva, Antônia I. A. Santos-Fita, Dídac Silva, Tiago Lucena Lopes-Filho, Isaac Ibernon Silva, Maria Isabel Afonso Barreto, Rebeca Mascarenhas Fonseca Oliveira, Marcela A Ferreira, Felipe Silva Santos, Ricardo Rodrigues Honorato-Júnior, Jaime Brazil, Marilene Vasconcelos Silva Sousa, Shirliane Araújo Oliveira, Deise C. L. Ferreira, Valéria R. F. Soares, Hyago K. L. Pinto, Marcia F. Beltrão-Mendes, Raone Rodrigues, Marcos Paulo Lopes Rocha, Wáldima Alves Gutiérrez Poblete, Roberto Schettini, Francisco Luigi Rojas, Joe S. S. Aspilcueta, Marco A. Zevallos, Justo D. V. Gagliardi-Urrutia, Giussepe Menéndez Delgado, Erick Rodolfo Polit-Vera, Mariela Lissette Rodríguez Ríos, Elvira Carrascal Velásquez, Juan Carlos Forlano Riera, Maria Dalila Perera Romero, Lucy Salas Dueñas, Danilo A. Garin, Daniel Mayor, Pedro Sanitat i Anatomia Animals Facultad Veterinaria Universitat Autònoma de Barcelona Campus UAB S/N Bellaterra Barcelona 08640 Spain Instituto de Desenvolvimento Sustentável Mamirauá GP Ecologia de Vertebrados Terrestres Estrada do Bexiga Amazonas Tefé 258469553 - 225 Brazil Departamento de Saúde Coletiva e Nutrição Centro de Ciências da Saúde Universidade Federal do Rio Grande do Norte Lagoa Nova Rio Grande do Norte Natal 59075000 Brazil University of Florida Gainesville 32611 FL United States School of Science Engineering and Environment University of Salford 43 Crescent Salford M5 4 WT United Kingdom Department of Nutrition Centre of Health Sciences Universidade Federal da Paraíba R. Tabeliao Estanislau Eloy S/N Paraiba João Pessoa 58050585 Brazil Natural Sciences Faculty of Science and Engineering Manchester Metropolitan University Chester Street Manchester M15 6BH United Kingdom Department of Geography University College London North West Wing Gower Street London WC1E 6BT United Kingdom Institute of Health and Animal Production Federal Rural University of the Amazon Av. Presidente Tancredo Neves 2501 Pará Belém 66077 - 830 Brazil Laboratory of Animal Health Postgraduate Program in Animal Health in the Amazon Institute of Veterinary Medicine Federal University of Pará Universidade Federal do Pará (UFPA) BR 316 Km 61 s/n bairro Saudade II Pará Castanhal 68746360 Brazil Programa de Pós-Graduação Em Agroecossistemas (PPGSI) Universidade Tecnológica Federal Do Paraná (UTFPR) Prolongamento da Rua Cerejeiras S/N Paraná Santa Helena 85892000 Brazil Department of Fish and Wildlife Conservation Virginia Polytechnic Institute and State University 310 West Campus Drive Blacksburg 24061 VA United States Associação SOS Amazônia Rua Pará 61 Acre Rio Branco 69905082 Brazil Universidade Federal do Amazonas Instituto Natureza e Cultura Rua 1º de Maio 5 bairro Colônia Amazonas Benjamin Constant 69630000 Brazil Antropología Social y Cult

The COVID-19 pandemic triggered unparalleled political, economic, and social ramifications, exacerbating global food insecurity (FI). To understand the overall impact of the pandemic and how different socio-economic groups were affected, we assessed prevalence and severity of FI in a sample of 18,997 households across seven countries in South America. We employed the Food Insecurity Experience Scale developed by the FAO. Our results showed that pre-pandemic, 4.5% of the sampled population across the entire continent faced Moderate FI, while 0.6% experienced severe FI. During the pandemic, Moderate FI increased to 16.9% (+ 12.4%), and Severe FI to 2.7% (+ 2.1%). By country, pre-pandemic households in Venezuela had the highest prevalence of Moderate FI (9.7%), with Peru experiencing the highest Severe FI frequency (1.1%). Peru had the greatest rise in Moderate (+ 23.9%) and Severe FI (+ 4.6%) during the pandemic. Low-income households, defined as those earning < 2 minimum wages per month, were most susceptible to FI. Uruguayan low-income families exhibited the most significant rise (+ 40.4%) in Moderate FI, while those in Peru experienced an increase of + 9.1% in Severe FI. This study measures the profound and far-reaching impact of the COVID-19 pandemic on FI in South America. Our findings also emphasise the critical importance of implementing effective public policy interventions to improve resilience against future shocks. This would enable policymakers to develop targeted strategies that address the immediate challenges posed by pandemics as well as laying the groundwork for a more resilient and sustainable food security landscape in the region. © The Author(s) 2025.

关键词： Covid-19 Food security Hunger Nutrition South America

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Supercapacitors: Carbon-Nanosheet Based Large-Area Electrochemical Capacitor that is Flexible, Foldable, Twistable, and Stretchable (Small 43/2018)

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Small 2018年第43期14卷

作者： Jong Han Jun Hyeonjun Song Changsoon Kim In-Suk Choi Youngjin Jeong Ji-Hoon Lee Department of Information Communication Materials and Chemistry Convergence Technology Soongsil University Seoul 06978 Republic of Korea Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 08826 Republic of Korea Advanced Institutes of Convergence Technology Suwon Gyeonggi 16229 Republic of Korea Department of Materials Science and Engineering Seoul National University Seoul 08826 Republic of Korea Department of Organic Materials and Fiber Engineering Soongsil University Seoul 06978 Republic of Korea Advanced Functional Thin Films Department Surface Technology Division Korea Institute of Materials Science (KIMS) Changwon Gyeongnam 51508 Republic of Korea

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Correction: Extended visible to near-infrared harvesting of earth-abundant FeS2–TiO2 heterostructures for highly active photocatalytic hydrogen evolution

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Green Chemistry 2018年第11期20卷 2663-2663页

作者： Tsung-Rong Kuo Hsiang-Ju Liao Yu-Ting Chen Chuan-Yu Wei Chia-Che Chang Yi-Chia Chen Yi-Hsuan Chang Jou-Chun Lin Yi-Cheng Lee Cheng-Yen Wen Shao-Sian Li Kung-Hsuan Lin Di-Yan Wang Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei 11031 Taiwan International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei 11031 Taiwan Department of Chemistry Tunghai University Taichung 40704 Taiwan Institute of Physics Academia Sinica Taipei 11529 Taiwan Department of Materials Science and Engineering National Taiwan University Taipei Taiwan Graduate Institute of Biomedical Optomechatronics College of Biomedical Engineering Taipei Medical University Taipei 11031 Taiwan

Correction for ‘Extended visible to near-infrared harvesting of earth-abundant FeS2–TiO2 heterostructures for highly active photocatalytic hydrogen evolution’ by Tsung-Rong Kuo et al., Green Chem., 2018, 20, 1640–...

Correction for ‘Extended visible to near-infrared harvesting of earth-abundant FeS₂–TiO₂ heterostructures for highly active photocatalytic hydrogen evolution’ by Tsung-Rong Kuo et al., Green Chem., 2018, 20, 1640–1647.

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A continuum poisson-‐boltzmann model for membrane channel proteins

arXiv

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arXiv 2017年

作者： Xiao, Li Diao, Jianxiong Greene, D'Artagnan Wang, Junmei Luo, Ray Department of Biomedical Engineering University of California IrvineCA92697 United States Department of Molecular Biology and Biochemistry University of California IrvineCA92697 United States Chemical and Materials Physics Graduate Program University of California IrvineCA92697 Department of Chemical Engineering and Materials Science University of California IrvineCA92697 United States Department of Pharmaceutical Sciences University of Pittsburg PittsburghPA15261 United States

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Immunotherapy: engineering an Artificial T‐Cell Stimulating Matrix for Immunotherapy (Adv. Mater. 23/2019)

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Advanced materials 2019年第23期31卷

作者： John W. Hickey Yi Dong Jae Wook Chung Sebastian F. Salathe Hawley C. Pruitt Xiaowei Li Calvin Chang Andrew K. Fraser Catherine A. Bessell Andrew J. Ewald Sharon Gerecht Hai‐Quan Mao Jonathan P. Schneck Department of Biomedical Engineering School of Medicine Baltimore MD 21218 USA Institute for Cell Engineering School of Medicine Baltimore MD 21205 USA Department of Pathology School of Medicine Baltimore MD 21287 USA Translational Tissue Engineering Center Baltimore MD 21287 USA Institute for NanoBioTechnology Baltimore MD 21218 USA Graduate Program in Immunology School of Medicine Baltimore MD 21205 USA Department of Chemical and Biomolecular Engineering Whiting School of Engineering Baltimore MD 21218 USA Department of Biology Krieger School of Arts and Sciences Baltimore MD 21218 USA Department of Materials Science and Engineering Whiting School of Engineering Baltimore MD 21218 USA Department of Cell Biology and Center for Cell Dynamics School of Medicine Baltimore MD 21205 USA Department of Oncology School of Medicine Baltimore MD 21205 USA Physical Sciences‐Oncology Center Baltimore MD 21218 USA Department of Medicine School of Medicine Johns Hopkins University Baltimore MD 21205 USA

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Study on chemotaxis and chemokinesis of bone marrow-derived mesenchymal stem cells in hydrogel-based 3D microfluidic devices

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Biomaterials Research 2016年第1期20卷 1-8页

作者： Yoon, Dayoung Kim, Hyerim Lee, Eojin Park, Min Hee Chung, Seok Jeon, Hojeong Ahn, Cheol-Hee Lee, Kangwon Center for Biomaterials Korea Institute of Science and Technology Seoul South Korea Research Institute of Advanced Materials (RIAM) Department of Materials Science and Engineering Seou National University Seoul South Korea Program in Nanoscience and Technology Graduate School of Convergence Science and Technology Seou National University Seoul South Korea School of Mechanical Engineering Korea University Seoul South Korea Advanced Institutes of Convergence Technology Gyeonggi-do South Korea

Background: Controlling the fate of mesenchymal stems cells (MSCs) including proliferation, migration and differentiation has recently been studied by many researchers in the tissue engineering field. Especially, recruitment of stem cells to injury sites is the first and crucial step in tissue regeneration. Although significant progress has been made in the chemotactic migration of MSCs, MSC migration in three dimensional environments remains largely unknown. We developed a 3D hydrogel-based microfluidic-device to study the migration behavior of human MSCs in the presence of stromal-cell derived factor-1α (SDF-1α), interleukin 8 (IL-8) and Substance P (SP) which have been utilized as chemoattractant candidates of human mesenchymal stem cells (hMSCs). Results: We systematically investigated the chemotactic migration behaviors of hMSCs and their responses to SDF-1a, IL-8, and SP. SDF-1α was shown to be the most fascinating chemoattractant candidate among those factors at a certain time point. We also found that each chemokine showed different chemoattractant abilities according to their concentration. In the case of SP, this factor showed chemokinesis not chemotaxis. Especially at a 7-8×10^-8 M concentration range, the chemokinesis ability driven by SP was further increased. The data suggest that some factors at the optimal concentration exhibit chemokinesis or chemotaxis in a 3D hydrogel-based microfluidic device. Conclusion: In this study on chemotaxis and chemokinesis of hMSCs, the system parameters such as chemokine concentration, system stability, and 2D or 3D microenvironment are critically important to obtain meaningful results. © 2016 The Author(s).

关键词： Chemokinesis Chemotaxis Mesenchymal stem cells Microfluidic device

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Publisher's Note: "Chemical vapor deposition of monolayer MoS2directly on ultrathin Al2O3for low-power electronics" [Appl. Phys. Lett. 110, 053101 (2016)]

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Applied Physics Letters 2017年第9期110卷

作者： Bergeron, Hadallia Sangwan, Vinod K. McMorrow, Julian J. Campbell, Gavin P. Balla, Itamar Liu, Xiaolong Bedzyk, Michael J. Marks, Tobin J. Hersam, Mark C. Department of Materials Science and Engineering Northwestern University EvanstonIllinois60208 United States Applied Physics Graduate Program Northwestern University EvanstonIllinois60208 United States Department of Physics and Astronomy Northwestern University EvanstonIllinois60208 United States Department of Chemistry Northwestern University EvanstonIllinois60208 United States Department of Electrical Engineering and Computer Science Northwestern University EvanstonIllinois60208 United States

This article was originally published online on 30 January 2017. Due to a production error, outdated versions of Figures 1 and 4 appeared in the article as orig

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Potential Fluctuations at Low Temperatures in Mesoscopic-Scale SmTiO3/SrTiO3/SmTiO3 Quantum Well Structures

arXiv

引用

arXiv 2017年

作者： Hardy, Will J. Isaac, Brandon Marshall, Patrick Mikheev, Evgeny Zhou, Panpan Stemmer, Susanne Natelson, Douglas Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX United States Materials Department University of California Santa BarbaraCA United States Department of Physics and Astronomy Rice University HoustonTX United States Department of Electrical and Computer Engineering Rice University HoustonTX United States Department of Materials Science and Nanoengineering Rice University HoustonTX United States

Heterointerfaces of SrTiO3 with other transition metal oxides make up an intriguing family of systems with a bounty of coexisting and competing physical orders. Some examples, such as LaAlO3/SrTiO3, support a high carrier density electron gas at the interface whose electronic properties are determined by a combination of lattice distortions, spin-orbit coupling, defects, and various regimes of magnetic and charge ordering. Here, we study electronic transport in mesoscale devices made with heterostructures of SrTiO3 sandwiched between layers of SmTiO3, in which the transport properties can be tuned from a regime of Fermi-liquid like resistivity (ρ ∝ T2) to a non-Fermi liquid (ρ ∝ T5/3) by controlling the SrTiO3 thickness. In mesoscale devices at low temperatures, we find unexpected voltage fluctuations that grow in magnitude as T is decreased below 20 K, are suppressed with increasing contact electrode size, and are independent of the drive current and contact spacing distance. Magnetoresistance fluctuations are also observed, which are reminiscent of universal conductance fluctuations but not entirely consistent with their conventional properties. Candidate explanations are considered, and a mechanism is suggested based on mesoscopic temporal fluctuations of the Seebeck coefficient. An improved understanding of charge transport in these model systems, especially their quantum coherent properties, may lead to insights into the nature of transport in strongly correlated materials that deviate from Fermi liquid theory. Copyright © 2017, The Authors. All rights reserved.

关键词： Rare earths

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Identification of Antiferromagnetic Domains Via the Optical Magnetoelectric Effect

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Physical Review Letters 2018年第5期121卷 057601-057601页

作者： Vilmos Kocsis Karlo Penc Toomas Rõõm Urmas Nagel Jakub Vít Judit Romhányi Yusuke Tokunaga Yasujiro Taguchi Yoshinori Tokura István Kézsmárki Sándor Bordács RIKEN Center for Emergent Matter Science (CEMS) Wako Saitama 351-0198 Japan Department of Physics Budapest University of Technology and Economics and MTA-BME Lendület Magneto-optical Spectroscopy Research Group 1111 Budapest Hungary Institute for Solid State Physics and Optics Wigner Research Centre for Physics Hungarian Academy of Sciences H-1525 Budapest P.O.B. 49 Hungary National Institute of Chemical Physics and Biophysics 12618 Tallinn Estonia Institute of Physics ASCR Na Slovance 2 182 21 Prague 8 Czech Republic Faculty of Nuclear Science and Physical Engineering Czech Technical University Břehová 7 115 19 Prague 1 Czech Republic Okinawa Institute of Science and Technology Graduate University Onna-son Okinawa 904-0395 Japan Department of Advanced Materials Science University of Tokyo Kashiwa 277-8561 Japan Quantum-Phase Electronics Center Department of Applied Physics University of Tokyo Tokyo 113-8656 Japan Department of Applied Physics University of Tokyo Hongo Tokyo 113-8656 Japan Experimental Physics 5 Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg 86159 Augsburg Germany Hungarian Academy of Sciences Premium Postdoctor Program 1051 Budapest Hungary

The ultimate goal of multiferroic research is the development of a new-generation nonvolatile memory devices, where magnetic bits are controlled via electric fields with low energy consumption. Here, we demonstrate the optical identification of magnetoelectric (ME) antiferromagnetic (AFM) domains in the LiCoPO4 exploiting the strong absorption difference between the domains. This unusual contrast, also present in zero magnetic field, is attributed to the dynamic ME effect of the spin-wave excitations, as confirmed by our microscopic model, which also captures the characteristics of the observed static ME effect. The control and the optical readout of AFM/ME domains, demonstrated here, will likely promote the development of ME and spintronic devices based on AFM insulators.

关键词： Magnetoelectric effect Optical & microwave phenomena Multiferroics Single crystal materials Terahertz spectroscopy

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