bluuebunny/crossref_metadata_2025_split huggingface dataset:
Construção social dos mercados de frutos do Cerrado: entre sociobiodiversidade e alta gastronomia
Authors: Guéneau Stéphane , Diniz Janaína Deane de Abreu Sá , Mendonça Sabina Dessartre , Garcia Jessica Pereira 
Published: November 2018

O Cerrado, o segundo maior bioma do Brasil e lar de enorme diversidade biológica e social, é considerado hoje como um dos hotspots mundias devido às pressões que tem sofrido com o avanço da fronteira do agronegócio. Para conservar estes recursos naturais, além de áreas protegidas, é necessária a valorização dos produtos obtidos através do agroextrativismo. Este artigo tem por objetivo analisar como a construção social dos mercados de produtos do agroextrativismo do Cerrado se baseia na difusão de valores socioambientais divulgados através da ação de organizações da sociedade civil, especialmente por meio de redes. A pesquisa incluiu entrevistas com os atores principais – agroextrativistas, intermediários, cooperativas, indústrias, distribuidoras, ONGs – além de visitas a campo, entre outros. Os resultados incluem uma análise da ação das redes, uma apresentação dos produtos e a descrição dos mercados. Estes indicam que a evolução dos mercados alternativos destes produtos na direção dos supermercados, de circuitos longos de comercialização e da gastronomia corre o risco de limitar a participação dos produtores agroextrativistas em circuitos dominantes.
Dinâmicas migratórias, trabalho e diferenciação social: o caso das migrações em Caxias do Sul.
Authors: Mocellin Maria Clara , Herédia Vania Beatriz Merlotti 
Published: November 2018

O propósito deste estudo é discutir as dinâmicas migratórias recentes ocorridas em uma cidade de porte médio do sul do Brasil. Essa cidadefoi marcada por diferentes fluxos migratórios desde a sua ocupação inicial, e esses fluxos foram se modificando a partir de diferentes conjunturas nacionais. Os fluxos migratórios para Caxias do Sul são de tipo laboral, o que faz com que a categoria trabalho seja o foco do estudo. A categoria trabalho é analisada como um elemento de diferenciação social que colabora para o entendimento dos processos identitários. O estudo é de natureza exploratória e de cunho qualitativo. Os resultados mostram que os distintos fluxos que chegaram à cidade acentuam as questões identitárias, dependendo da sociedade de origem do fluxo. Mostram também que os diversos deslocamentos populacionais que se direcionaram à Caxias do Sul foram motivados pela busca por trabalho, sendo as migrações internas estimuladas pela concepção de ascensão social, e as internacionais por garantias de trabalho.
A “miséria” da educação: análise de um manual de “empreendedorismo” do SEBRAE para professores do ensino fundamental.
Authors: Dias Vanessa Tavares 
Published: November 2018

O Serviço Brasileiro de Apoio às Micro e Pequenas Empresas (Sebrae) tem sido a principal agência no Brasil a difundir o chamado “empreendedorismo”. Nas capitais e, especialmente, no interior do país, uma das ações da agência tem sido estabelecer convênios com prefeituras municipais, com vistas a vender projetos voltados para a formação de sujeitos empreendedores. Entre os projetos está o programa Jovens Empreendedores Primeiros Passos, que consiste em um curso de “empreendedorismo” voltado para crianças e jovens de escolas públicas e privadas. Este trabalho analisa o conteúdo discursivo do manual do professor, elaborado por essa agência, destinado a educadores do primeiro ano do ensino fundamental. Na análise, consideramos o Sebrae aparelho privado de hegemonia, conceito do pensador italiano Antonio Gramsci, e buscamos compreender o manual tendo como base a concepção de ideologia concebida pelo mesmo autor. Nossa análise identificou aspectos que evidenciam recursos narrativos que visam enaltecer e naturalizar o ato de abrir uma empresa. Esses recursos buscam, entre outras coisas, atrelar ao mundo dos negócios aspectos que lhe são alheios, além de ocultar fatores importantes para a compreensão da realidade concreta. Ao fim, constatamos que o curso estimula a valorização do valor de troca, desconsidera o valor-trabalho e reproduz do fenômeno da alienação.
Trabalho familiar na produção de dendê sob contrato na Amazônia brasileira: o caso de Santa Maria, Pará.
Authors: Caetano Márcia Coutinho , Mota Dalva Maria da , Ferreira Maria do Socorro Gonçalves 
Published: November 2018

O objetivo deste artigo é analisar as novas evidências do trabalho familiar num contexto de incentivo à especialização para o cultivo de dendê(Elaeis guineensis Jacq.). A pesquisa foi realizada por meio de um estudo de caso com observações e entrevistas na localidade Santa Maria, município de Tomé-Açu, Pará, um dos polos de produção de dendê na Amazônia brasileira. As principais conclusões são de que o trabalho familiar passa por redefinições no cultivo de dendê em decorrência: i) da intensificação do trabalho com o monocultivo do dendê em sistemas produtivos diversificados; ii) da mão de obra familiar ser insuficiente, ocasionando a necessidade de contratar assalariados para poder cumprir o contrato; iii) das mulheres dedicarem-se minoritariamente ao trabalho no dendê e concentrarem-se nas atividades domésticas e não agrícolas; iv) da tendência de masculinização da força de trabalho sob argumento do peso da atividade em questão; e v) da permanência dos jovens no trabalho agrícola no estabelecimento familiar, contrariando tendência nacional de saída dos mesmos.
Utility of 4-Factor Prothrombin Complex Concentrate in Trauma and Acute-Care Surgical Patients
Authors: Sellers William , Bendas Charles , Toy Frederick , Klock Brian , Kerestes Jamie , Young Amanda , Badger Clint , Jensen Jason , Becker Natasha 
Published: November 2018

Abstract

Context
Since 2013, prothrombin complex concentrate (PCCs) have been approved in the United States for the reversal of anticoagulation induced by vitamin K antagonists. However, there has been limited investigation into their use in trauma and acute-care surgery (ACS).

Objective
To investigate the role that 4-factor PCC may have in reversing anticoagulation in the setting of trauma and ACS.

Methods
All trauma and ACS patients who presented between March 14, 2014, and August 1, 2015, were included in this retrospective descriptive analysis. Patients receiving 4-factor PCC were compared with patients receiving fresh frozen plasma (FFP) alone. The following data were collected from medical records: age, sex, race, international normalized ratio (INR) at admission (baseline) and after reversal, blood products given, dosing of medication, injury severity score, length of stay, thromboembolic event, death during admission, and death within 90 days after admission.

Results
There were 188 trauma and ACS patients who required reversal of anticoagulation. Of these, 98 patients received FFP and 90 received PCC. Patients who received PCC were at increased risk for death during admission (20% vs 9.2% for FFP group) or within 90 days (39% vs 15%, respectively). Patients in the PCC group had a higher median baseline INR (2.9 vs 2.5 in the FFP group) and a lower postintervention INR (1.4 vs 1.8); consequently, the decrease in INR was greater in the PCC group than in the FFP group (1.5 vs 0.7, respectively). The number of total units of packed red blood cells transfused was significantly higher in patients receiving PCC.

Conclusion
Patients receiving PCC had worse outcomes than those who received FFP. Given that these differences may have resulted from baseline differences between groups, these results mandate further prospective analysis of the use of PCC in trauma and ACS patients.
Rapid Learning in Frontline Grocery Workers During the COVID‐19 Pandemic
Authors: Halilova Julia G. , Valtchanov Deltcho , Rosenbaum R. Shayna 
Published: November 2024

ABSTRACTProlonged stress and the need for rapid uptake of information can have detrimental effects on memory and cognition, whereas meaningfulness of study material and motivation to learn can have positive effects. How do these opposing conditions impact workplace learning in essential frontline workers during a global pandemic? We analyzed learning data collected longitudinally since before the pandemic in over 85,000 essential frontline grocery workers and nonessential telecommunications workers via a learning management system that incorporates a spaced retrieval schedule, where items are retrieved following retention intervals of varying length. Findings indicate more rapid knowledge uptake in grocery workers (a) during than before the pandemic, (b) for COVID‐19‐related content than non‐COVID content, and (c) in the United States than in Canada. Longer‐term maintenance of training material was similar across groups. Evidence of enhanced workplace learning and retention supports efforts to integrate empirically based strategies from the behavioral sciences into learning‐based technologies.
Intrinsic Activity: A Critical Challenge of Alkaline Hydrogen Oxidation Reaction
Authors: Song Xiaoyun , Yang Qimei , Zou Kaisheng , Xie Zhenyang , Wang Jian , Ding Wei 
Published: November 2024

AbstractAnion exchange membrane fuel cells (AEMFCs) are advantageous for reducing or even eliminating the dependency on platinum resources, as the alkaline environment allows the use of non‐precious metal catalysts for oxygen reduction reaction at the cathode. However, the intrinsic activity of hydrogen oxidation reaction (HOR) catalysts in alkaline environments is 2 to 4 orders of magnitude lower than in acidic environments, which becomes the major challenge for AEMFCs. This review examines the current developments in the intrinsic activity of alkaline HOR catalysts and systematically summarizes the hydrogen activation mechanism with a focus on potential influencing factors and enhancement strategies. Furthermore, it offers insights into the prospects for developing more efficient alkaline HOR catalysts.
ZnO‐CuS/F127 Hydrogels with Multienzyme Properties for Implant‐Related Infection Therapy by Inhibiting Bacterial Arginine Biosynthesis and Promoting Tissue Repair
Authors: Sun Yiwei , Zhang Wei , Luo Zhiwen , Zhu Can , Zhang Yiqun , Shu Zheng , Shen Cailiang , Yao Xiaxi , Wang Yuanyin , Wang Xianwen 
Published: November 2024

AbstractImplant‐related infections are characterized by the formation of bacterial biofilms. Current treatments have various drawbacks. Nanozymes with enzyme‐like activity can produce highly toxic substances to kill bacteria and remove biofilms without inducing drug resistance. However, it is difficult for current monometallic nanozymes to function well in complex biofilm environments. Therefore, the development of multimetallic nanozymes with efficient multienzyme activities is crucial. In the present study, bimetallic nanozyme, ZnO‐CuS nanoflowers with peroxidase (POD), glutathione oxidase (GSH‐Px), and catalase (CAT) activity are successfully synthesized via calcination and loaded into F127 hydrogels for the treatment of implant‐related infections. The ability of ZnO‐CuS nanoflowers to bind bacteria is key for efficient antimicrobial activity. In addition, ZnO‐CuS nanoflowers with H2O2 disrupt the metabolism of MRSA, including arginine synthesis, nucleotide excision repair, energy metabolism, and protein synthesis. ZnO‐CuS/F127 hydrogel in combination with H2O2 has been demonstrated to be effective in clearing biofilm infection and facilitating the switch of M1 macrophages to M2‐repairative phenotype macrophages for the treatment of implant infections in mice. Furthermore, ZnO‐CuS/F127 hydrogels have favorable biosafety, and their toxicity is negligible. ZnO‐CuS/F127 hydrogel has provided a promising biomedical strategy for the healing of implant‐related infections, highlighting the potential of bimetallic nanozymes for clinical applications.
Optimizing Hygroscopic Metal–Organic Frameworks via EDTA‐Mediated Structural Reinforcement and Photothermal Modification
Authors: Cheng Mingren , Lian Xin , Bai Haoyu , Wang Xinsheng , Xu Jian , Cao Moyuan , Bu Xian‐He 
Published: November 2024

AbstractHygroscopic metal–organic frameworks (MOFs) are considered as superior moisture sorbents due to their highly adjustable and desired water adsorption/release performance, enabling effective atmospheric water harvesting (AWH) in arid regions. However, the water adsorption capacity, recycling stability, and functionality of current MOFs should be further improved to meet the requirements of practical AWH systems. Here the hydrophilicity at low relative humidity (RH) and cycling stability of MOF‐808 are simultaneously enhanced through the ethylenediaminetetraacetic acid (EDTA)‐mediated post‐modification. Based on the structural reinforcement, EDTA‐modified MOF‐808 (E‐MOF‐808) delivers a stable water uptake capacity of 0.39 g g−1 at 25% RH even after 50 water adsorption–desorption cycles, more than five times that of pristine MOF‐808. In addition, bridging by EDTA with the strong chelating ability, the E‐MOF‐808 can spontaneously capture Cu2+ for further functional improvement. Accordingly, light‐absorbing CuS nanoparticles can be in situ decorated on E‐MOF‐808 for facilitating solar‐driven water release. It is envisioned that this EDTA‐mediated function enhancement should provide valuable insights into the all‐in‐one design of versatile MOFs sorbents.
Constructing Angstrom‐Level Ion Pocket Array in 1D Channel Wall for Efficient Lithium Ion Sieving
Authors: Zhao Xudong , Zhang Xueyan , Xing Xinxin , Bian Fenglan , Gao Xinli , Liu Baosheng , Song Sufang , Zhang Yuezhong , Huang Hongliang 
Published: November 2024

AbstractThe rapid development of new energy industry is leading to the scarcity of lithium (Li) metal. Rational design of adsorbents for efficient separation of Li+ ion from aqueous media is pivotal to solve the recovery of this valuable resource. Current adsorbents generally suffer from the drawbacks in adsorption capacity, kinetics, and selectivity. Herein, a novel and ultra‐stable metal–organic framework is designed for Li+ separation. The dense oxygen atoms on the cambered wall of its 1D channel encircle to form angstrom‐level tetrahedral ion pockets array, acting as the dominant adsorption sites. This rational distribution of the array avoids the pore blockage caused by the pre‐adsorbed ions, thereby accelerating the diffusion of subsequent ions into the interior pore. Meanwhile, this tetrahedral pocket shows distinct electronegativity and strong chelation effect for Li+. Benefiting from these specifics, this adsorbent exhibits a record‐breaking adsorption capacity for Li+ (76.1 mg g−1) and short equilibrium time (30 min). Moreover, the selective adsorption of Li+ over Na+, K+, Ca2+, and Mg2+ is achieved due to the matched Li+ ion diameter with the pocket/channel sizes and lower energy barrier for dehydration. Thus, this work proposes a feasible strategy for the construction of novel MOFs for ions adsorption.
Coordination of Ultralow Permittivity and Higher Thermal Conductivity of Polyimide Induced by Unique Interfacial Self‐Assembly Behavior
Authors: Dong Xiaodi , Wan Baoquan , Huang Langbiao , Zhao Quanliang , Yao Ruifeng , Gao Jinghui , Ding Can , Wang Xu , Dang Zhi‐Min , Chen George , Zha Jun‐Wei 
Published: November 2024

AbstractUpgrading the available dielectric materials is the most effective approach to solve the poor quality of signal transmission and heat buildup caused by high density integration. In this work, a design strategy for multilayer 3D porous composite networks is proposed, relying on the self‐assembly effect of “crystal‐like phase” to achieve the synergistic optimization of low permittivity and high thermal conductivity of polyimide. The obtained three‐layer porous polyimide composite film (PSLS) features an ultralow permittivity of 1.89, an in‐plane thermal conductivity as high as 13.58 W m−1 K−1, and maintains well electrical insulating property. Inspiringly, the first digital thermoacoustic generator with wide frequency response has been designed based on PSLS film. It achieves sound pressure levels up to 60.1 dB in the 20–100 kHz range and integrates the efficient sound generation of an ultrasonic generator with real‐time display. This work will provide a novel concept material for the smart electronics and electrical fields.
Underwater Vibration Sensor to Enable Automated and Contactless Voice Recognition
Authors: Sarkar Debasmita , Kara Ufuoma I. , Singh Rajan , Phukan Anirban , Mondal Priyam , Paily Roy P. , Wang Xiaoguang , Manna Uttam 
Published: November 2024

AbstractIndividuals suffering from voice disabilities have limited access to currently available automation technologies that operate through voice commands. To address this issue, an alternative voice recognition approach is essential without directly monitoring the audio signals generated from the vocal cord. In this work, the design of a chemically reactive and conductive sponge is reported to create an underwater vibration sensor with a fast response time and high sensitivity, through orthogonal modulation of conductivity (40–2150 kΩ), water repellence (0°–154°) and mechanical properties (0.32–2.63 MPa). This class of porous sponge sensors enables the identification of subtle water waves generated at the air–water interface and extends its utility to detecting a variety of locomotion (squatting, jumping, walking, etc.), as well as automated voice recognition using a deep learning model without direct contact with the human body. Overall, this underwater vibration sensor provides a novel basis for remote interaction with automated technologies, which finds use in medical diagnostics, human‐machine interfaces, and underwater communication systems.
Understanding, Mimicking, and Mitigating Radiolytic Damage to Polymers in Liquid Phase Transmission Electron Microscopy
Authors: Wu Hanglong , Sun Hongyu , Oerlemans Roy A. J. F. , Li Siyu , Shao Jingxin , Wang Jianhong , Joosten Rick R. M. , Lou Xianwen , Luo Yingtong , Zheng Hongkui , Abdelmohsen Loai K. E. A. , Garza H. Hugo Pérez , van Hest Jan C. M. , Friedrich Heiner 
Published: November 2024

AbstractAdvances in liquid phase transmission electron microscopy (LP‐TEM) have enabled the monitoring of polymer dynamics in solution at the nanoscale, but radiolytic damage during LP‐TEM imaging limits its routine use in polymer science. This study focuses on understanding, mimicking, and mitigating radiolytic damage observed in functional polymers in LP‐TEM. It is quantitatively demonstrated how polymer damage occurs across all conceivable (LP‐)TEM environments, and the key characteristics and differences between polymer degradation in water vapor and liquid water are elucidated. Importantly, it is shown that the hydroxyl radical‐rich environment in LP‐TEM can be approximated by UV light irradiation in the presence of hydrogen peroxide, allowing the use of bulk techniques to probe damage at the polymer chain level. Finally, the protective effects of commonly used hydroxyl radical scavengers are compared, revealing that the effectiveness of graphene's protection is distance‐dependent. The work provides detailed methodological guidance and establishes a baseline for polymer degradation in LP‐TEM, paving the way for future research on nanoscale tracking of shape transitions and drug encapsulation of polymer assemblies in solution.
Nanomaterial‐Mediated Reprogramming of Macrophages to Inhibit Refractory Muscle Fibrosis
Authors: Cheng Xu , Sui Hao , Chen Fangman , Li Chenghao , Du Meijun , Zhang Shiming , Chen Jiali , Dou Jinfeng , Huang Yixuan , Xie Xiaochun , Cheng Chuanxu , Yang Renjie , Yang Chao , Shi Bing , Shao Dan , Leong Kam W. , Huang Hanyao 
Published: November 2024

AbstractOrofacial muscles are particularly prone to refractory fibrosis after injury, leading to a negative effect on the patient's quality of life and limited therapeutic options. Gaining insights into innate inflammatory response‐fibrogenesis homeostasis can aid in the development of new therapeutic strategies for muscle fibrosis. In this study, the crucial role of macrophages is identified in the regulation of orofacial muscle fibrogenesis after injury. Hypothesizing that orchestrating macrophage polarization and functions will be beneficial for fibrosis treatment, nanomaterials are engineered with polyethylenimine functionalization to regulate the macrophage phenotype by capturing negatively charged cell‐free nucleic acids (cfNAs). This cationic nanomaterial reduces macrophage‐related inflammation in vitr and demonstrates excellent efficacy in preventing orofacial muscle fibrosis in vivo. Single‐cell RNA sequencing reveals that the cationic nanomaterial reduces the proportion of profibrotic Gal3+ macrophages through the cfNA‐mediated TLR7/9‐NF‐κB signaling pathway, resulting in a shift in profibrotic fibro‐adipogenic progenitors (FAPs) from the matrix‐producing Fabp4+ subcluster to the matrix‐degrading Igf1+ subcluster. The study highlights a strategy to target innate inflammatory response‐fibrogenesis homeostasis and suggests that cationic nanomaterials can be exploited for treating refractory fibrosis.
Improving Oxygen‐Redox‐Active Layered Oxide Cathodes for Sodium‐Ion Batteries Through Crystal Facet Modulation and Fluorinated Interfacial Engineering
Authors: Sun Yiran , Weng Junying , Zhou Pengfei , Yuan Wenyong , Pan Yihao , Wu Xiaozhong , Zhou Jin , Cheng Fangyi 
Published: November 2024

AbstractLayered oxides with active oxygen redox are attractive cathode materials for sodium‐ion batteries (SIBs) due to high capacity but suffer from rapid capacity/voltage deterioration and sluggish reaction kinetics stemming from lattice oxygen release, interfacial side reactions, and structural reconstruction. Herein, a synergistic strategy of crystal‐facet modulation and fluorinated interfacial engineering is proposed to achieve high capacity, superior rate capability, and long cycle stability in Na0.67Li0.24Mn0.76O2. The synthesized single‐crystal Na0.67Li0.24Mn0.76O2 (NLMO{010}) featuring increased {010} active facet exposure exhibits faster anionic redox kinetics and delivers a high capacity (272.4 mAh g−1 at 10 mA g−1) with superior energy density (713.9 Wh kg−1) and rate performance (116.4 mAh g−1 at 1 A g−1). Moreover, by incorporating N‐Fluorobenzenesulfonimide (NFBS) as electrolyte additive, the NLMO{010} cathode retains 84.6% capacity after 400 cycles at 500 mA g−1 with alleviated voltage fade (0.27 mV per cycle). Combined in situ analysis and theoretical calculations unveil dual functionality of NFBS, which results in thin yet durable fluorinated interfaces on the NLMO{010} cathode and hard carbon anode and scavenges highly reactive oxygen species. The results indicate the importance of fast‐ion‐transfer facet engineering and fluorinated electrolyte formulation to enhance oxygen redox‐active cathode materials for high‐energy‐density SIBs.