bluuebunny/crossref_metadata_2025_split huggingface dataset:
Physicochemical properties and in vitro stability studies of green synthesized gold nanoparticles using pelargonium sidoides
Authors: Badeggi U.M. , Lawal B.A. , Akinfenwa A.O. , Ayipo Y.O. , Azeh Y. , Dagaci M.Z. 
Published: September 2020

In the present study, Pelargonium sidoides (PS) extract was used in the green synthesis of AuNPs that was characterized by UV-Vis, TEM, SAED, EDS, XRD, FTIR, and DLS. UV-Vis showed a surface plasmon resonance (SPR) at λmax of 532 nm while TEM shows that the particles are predominantly spherical and monodispersed. DLS measurement indicated the particle size and the zeta potential to be 27.20 nm and -24.0 mV respectively. The in vitro stability of the hybrid particles in different solutions and buffers (pH 7 and 9) confirmed that the particles are stable over a given period. The method employed is simple, environmentally friendly, and inexpensive. Our studies suggest that the Pelargonium sidoides-gold nanoparticles (PS-AuNPs) may be safely used in biomedical applications such as drug delivery.
Keywords: Pelargonium sidoides; biosynthesis; biomedicals; capping agent; zeta potential
Reseña de la obra colectiva: Empresarios, empresas y actividad agrícola en el norte de México: siglo XX
Authors: Zallas Esquer Lidia Amalia 
Published: September 2020

La obra colectiva titulada Empresarios, empresas y actividad agri?cola en el norte de Me?xico: siglo XX, bajo la coordinacio?n de Ana Isabel Grijalva Di?as y Juan Jose? Gracida Romo, publicada por el Colegio de Sonora en junio de 2017, es resultado de la conjuncio?n de esfuerzos de seis investigadores, en su mayori?a miembros de la Asociacio?n de Historia Econo?mica del Norte de Me?xico y de la Asociacio?n Mexicana de Historia Econo?mica, pertenecientes a distintas instituciones de educacio?n superior.
Entre los temas abordados se distinguio? la presencia de grupos empresariales que se instalaron en los espacios agri?colas del noreste y noroeste de Me?xico, vinculados con las actividades agri?cola , agroindustrial y los agronegocios.
Análisis de una empresa familiar de la industria panificadora bajo el enfoque del modelo de los tres círculos
Authors: Flores Pérez Kevin Gamaliel , Pereyra Chan Andrés , Viana Cano Julissa , Chan Canto Jeniffer 
Published: September 2020

El presente artículo comenzó con la importancia de la empresa familiar en el cual se menciona que en México y a nivel mundial, al menos el 90% de las empresas que hay, son familiares, además que generan alrededor del 60% del empleo en el país y su aportación en la Producción Nacional Bruta es entre 40% - 60%; esta investigación tuvo por objetivo realizar un análisis de la empresa familiar basada en el modelo de los tres círculos y proponer las acciones de mejora.
Así mimo se presentaron los datos generales de la unidad de análisis, así como los antecedentes, misión, visión, valores, ubicación, estructura organizacional, descripción de puestos, historia y estructura familiar, genograma de la panadería “X”, los roles de la familia.
En cuanto a los materiales y métodos utilizados, la investigación fue mixta, es cualitativa de carácter descriptivo, se explicaron los principales rasgos de fenómeno social, el diseño es de caso único. La investigación del diagnóstico se evalúa mediante el tipo de investigación cuantitativa mediante la recolección de datos con base en la medición numérica y el análisis estadístico, con el fin establecer pautas de comportamiento. El instrumento que se aplica es un formato de diagnóstico adoptado por Muller et al. (2008).
Los resultados obtenidos del análisis en la empresa familiar, arrojo en el rubro de efectividad de la empresa un promedio de 6.88, en el rubro de afectividad familiar se obtuvo un promedio de 8.86 y en el apartado de la estructura de la propiedad se obtuvieron tres de los diez factores críticos positivos.
Al final se plantean las acciones a implementar, las cuales deben ser aplicadas particularmente en esta empresa; respecto a los factores críticos bajos y altos en los subsistemas empresa, familia y propiedad así poder hacer más efectiva la gestión de la empresa, se reduzcan los problemas familiares y de la propiedad buscando que la relación entre los tres subsistemas se lleve de la mejor manera posible, así como para prevenir los contratiempos en la empresa.
Drought monitoring and early warning in China: a review of research to pave the way for operational systems
Authors: Barker Lucy J. , Hannaford Jamie , Ma Miaomiao 
Published: September 2020

Abstract. Geographic and socio-economic factors combined make China particularly vulnerable to droughts. Here we review academic literature to assess publication trends on the topics of drought monitoring and early warning in China, exploring the common themes and recent advances presented. Literature searches for the 1970–2017 period were made for a range of search terms relating to drought monitoring. It was found that publications on these topics started to appear sporadically in 1989 and have increased
rapidly since the early 2000s, with the rate of publication increasing over
the last eight years. The scope of studies varied, often with the spatial
scale considered: at the national scale, studies focused on evaluating
existing indices, while new indices were developed and tested at the
regional scale – relating, in general, to monitoring agricultural and
meteorological droughts. At the catchment scale, novel monitoring techniques were developed, often incorporating other data types such as modelled data or soil moisture measurements. National scale operational drought monitoring in China is currently being improved and updated. However, although operational systems are discussed in the literature, there is a still a disconnect between theory and practice with the most recent advances not yet operationalised. Here, we identify the methods and approaches which can be translated from the experimental case study scale to the national operational scale.
Brazil and the Liquidity Trap
Authors: Cerbaro Rodolfo Henrique , Da Silva Pereira André , Bisinella Everton 
Published: September 2020

With high-interest rates being the norm as this is written, Brazil has little reason to be worried about liquidity traps which have recently resurged in international economic literature. Studies intertwining the Brazilian scenario with them have been sparse. However, Brazil's legislative framework raises alarms: fiscal legislation with the principle of legality as applied in the Brazilian scenario seems to form a problematic situation. The goal of this work is to alert one to the possible undesirable effects, caused by short-sighted legislation should a liquidity trap occur in Brazil, although it does not seem to be a concern in the short term. The methodology we use is descriptive and bibliographical, through a revision of the literature. We conclude that if the argument of a significant part of the literature is thought to follow, the country may find itself in a worrisome scenario.
In the Sunken Submarine
Authors: Bakich Olga 
Published: September 2020

The chapter analyzes the development and artistic responses of Russian emigré poetry under the pressures of Japanese occupation during the Manchukuo years (1932-1945). It also examines what exile and losing one's nation meant for these stateless intellectuals. Several poets and their works are investigated, along with state-sponsored poetry competitions featuring Russian authors as a means to represent the "success" of multi-ethnic literary endeavours in Manchukuo.
The case of a 37‐year‐old male with trouble ambulating and incontinence
Authors: Bega Danny 
Published: September 2020

SummaryA 37 year‐old previously healthy man from Jamaica presented with 2‐3 months of progressive trouble ambulating and incontinence. By 1 month prior to arrival he was wheelchair bound and unable to ambulate even with assistance. He started to wear a diaper for bladder and bowel incontinence. He also complained of painless numbness in his legs over the same period of time. His exam is notable for marked weakness and spasticity in his legs, with hyper‐reflexia and clonus. He has a sensory level at the level of the umbilicus. An MRI shows a longitudinally extensive T2 signal change throughout the thoracic cord. His cerebrospinal fluid is mildly inflammatory. His HTLV‐1 antibody test is reactive.
Trapped mass estimation in automotive diesel engines based on in‐cylinder pressure signal projection
Authors: Youssef Bilal 
Published: September 2020

AbstractCylinder pressure signal provides key feedback information that allows for several engine monitoring and control capabilities. During the last few years, the use of cylinder pressure traces for advanced combustion strategies has become the focus of several research works. This is primarily due to the availability of reliable and inexpensive cylinder pressure sensors with expected durability that meets the vehicle lifetime. In this context, several approaches have been proposed to determine the engine trapped mass from the cylinder pressure measurements. A recent innovative approach for trapped charge determination based on a two‐dimensional graphical signature is proposed in a previous work. The resulting estimator uses cylinder pressure signal as a unique input and allows to deduce the trapped mass on a cycle by cycle basis in steady and transient operating conditions. It has been validated in a wide range of engine operating conditions using instrumentation and industrial cylinder pressure sensors. This paper provides a theoretical framework and in‐depth analysis for the signature based trapped mass estimator. A state‐space model for in‐cylinder conditions during the compression phase that complies with the signature modeling structure is developed. Extensive numerical investigations using an experimentally validated simulation platform are then performed. The objective is to select the optimal signature generation interval that reduces the impact of cycle to cycle fluctuations in terms of intake valve closing temperature and polytropic index. The obtained results are promising and clearly show the performance and robustness of the signature based trapped mass estimator that can provide relevant feedback information for adaptive engine control systems. It can be easily implemented for real‐time monitoring and control in industrial automotive applications.
Antiphase Boundaries Constitute Fast Cation Diffusion Paths in SrTiO3 Memristive Devices
Authors: Heisig Thomas , Kler Joe , Du Hongchu , Baeumer Christoph , Hensling Felix , Glöß Maria , Moors Marco , Locatelli Andrea , Menteş Tevfik Onur , Genuzio Francesca , Mayer Joachim , De Souza Roger A. , Dittmann Regina 
Published: September 2020

AbstractResistive switching in transition metal oxide‐based metal‐insulator‐metal structures relies on the reversible drift of ions under an applied electric field on the nanoscale. In such structures, the formation of conductive filaments is believed to be induced by the electric‐field driven migration of oxygen anions, while the cation sublattice is often considered to be inactive. This simple mechanistic picture of the switching process is incomplete as both oxygen anions and metal cations have been previously identified as mobile species under device operation. Here, spectromicroscopic techniques combined with atomistic simulations to elucidate the diffusion and drift processes that take place in the resistive switching model material SrTiO3 are used. It is demonstrated that the conductive filament in epitaxial SrTiO3 devices is not homogenous but exhibits a complex microstructure. Specifically, the filament consists of a conductive Ti3+‐rich region and insulating Sr‐rich islands. Transmission electron microscopy shows that the Sr‐rich islands emerge above Ruddlesden–Popper type antiphase boundaries. The role of these extended defects is clarified by molecular static and molecular dynamic simulations, which reveal that the Ruddlesden–Popper antiphase boundaries constitute diffusion fast‐paths for Sr cations in the perovskites structure.
Wool Can Be Cool: Water‐Actuating Woolen Knitwear for Both Hot and Cold
Authors: Hu Jinlian , Irfan Iqbal Mohammad , Sun Fengxin 
Published: September 2020

AbstractAs a second skin of the human body, clothing offers protection and aesthetic qualities. Because of the inability of materials to adapt to different weather conditions, different clothing is required for different seasons, namely, thin and open garments for summer, thick and closed ones for winter. Moreover, the body maintains its internal core temperature (37 °C) through sweating and shivering. Herein it is reported that woolen knitwear can provide not only warmth, but also a cooling sensation when a body sweats. The fascinating water‐responsive switching (opening/closing) of the knit pores keeps the skin dry, thus helping to maintain a constant body temperature, providing comfort and safety.
Artificial Trees Inspired by Monstera for Highly Efficient Solar Steam Generation in Both Normal and Weak Light Environments
Authors: Wang Hongqiang , Zhang Chen , Zhang Zhihua , Zhou Bin , Shen Jun , Du Ai 
Published: September 2020

AbstractSolar steam generation has been extensively studied for its potential application in power generation and water treatment. Although some efficient evaporators have been developed, the challenge of the abrupt drop in the evaporator performance under outdoor environments remains to be overcome. The heteroblasty of Monstera and other climbers allows them to grow rapidly under the extreme shade of a tropical rainforest, inspiring the design of a high‐efficiency evaporator that can function even in weak light environments. Herein, artificial trees that imitate the leaf fenestration of Monstera combined with the Chinese paper cutting technique exhibit the highest evaporation rate of 2.30 kg m−2 h−1. Moreover, under oblique incidence (from 0° to 75°) and dappled sunlight, the evaporation rates of artificial trees with leaf fenestration are 1.08–1.26 and 1.34–2.78 times those of artificial trees without leaf fenestration and a 2D evaporator, respectively. The excellent performance is attributed to high‐efficiency light absorption, photothermal conversion, high evaporation area, and excellent light and thermal management abilities, which are achieved through leaf fenestration and efficient thermal recovery through multiple reflections of light and thermal radiation between the leaves. The design of the 3D hierarchical structure and leaf fenestration are also applicable for various light absorbents.
Hierarchically Structured DNA‐Based Hydrogels Exhibiting Enhanced Enzyme‐Responsive and Mechanical Properties
Authors: Du Xiaoxue , Bi Yanhui , He Pingping , Wang Chunyan , Guo Weiwei 
Published: September 2020

AbstractProgrammable stimuli‐responsive materials have great potential in biosensing and biomedical applications. However, the slow response of DNA hydrogels to biological targets, especially bio‐macromolecules, i.e., proteins, due to the slow mass transfer within hydrogel matrices, as well as poor mechanical strength, severely hinders their extensive applications. Herein, the construction of hierarchically structured DNA hydrogels exhibiting significantly enhanced responsive and mechanical properties via a facile cryostructuration process is demonstrated. During the cryostructuration, interconnected macropores that can function as the channels for the migration of bio‐macromolecular substances, i.e., enzymes, are formed with the generated ice crystals as templates; meanwhile, densely crosslinked networks between the macropores are formed by the concentrated monomers localized in the unfrozen zones of the gelation system, leading to higher strength of the gel matrices. By programming the sequences of the DNA crosslinkers, two model hydrogels composed of enzyme‐responsive DNA structures and catalytic DNA crosslinking structures that can collaborate with enzymes to form biocatalytic cascades are constructed, and, in both systems, the hierarchically structured DNA hydrogels exhibit significantly enhanced responsive properties and mechanical strengths compared with typical DNA hydrogels. Moreover, the introduction of thermosensitive polymers can further endow the system with thermally switchable responsive properties.
Homogeneous and Fast Ion Conduction of PEO‐Based Solid‐State Electrolyte at Low Temperature
Authors: Xu Shengjun , Sun Zhenhua , Sun Chengguo , Li Fan , Chen Ke , Zhang Zhihao , Hou Guangjin , Cheng Hui‐Ming , Li Feng 
Published: September 2020

AbstractPoly(ethylene oxide) (PEO)‐based electrolytes are promising for all‐solid‐state batteries but can only be used above room temperature due to the high‐degree crystallization of PEO and the intimate affinity between ethylene oxide (EO) chains and lithium ions. Here, a homogeneous‐inspired design of PEO‐based solid‐state electrolytes with fast ion conduction is proposed. The homogeneous PEO‐based solid‐state electrolyte with an adjusted succinonitrile (SN) and PEO molar ratio simultaneously suppresses the PEO crystallization and mitigates the affinity between EO and Li+. By adjusting the molar ratio of SN to PEO (SN:EO ≈ 1:4), channels providing fast Li+ transport are formed within the homogeneous solid‐state polymer electrolyte, which increases the ionic conductivity by 100 times and enables their application at a low temperature (0–25 °C), together with the uniform lithium deposition. This modified PEO‐based electrolyte also enables a LiFePO4 cathode to achieve a superior Coulombic efficiency (>99%) and have a long life (>750 cycles) at room temperature. Moreover, even at a low temperature of 0 °C, 82% of its room‐temperature capacity remains, demonstrating the great potential of this electrolyte for practical solid‐state lithium battery applications.
Silk‐Based Biomaterials for Cardiac Tissue Engineering
Authors: Song Yu , Wang Huifang , Yue Feifei , Lv Qiying , Cai Bo , Dong Nianguo , Wang Zheng , Wang Lin 
Published: September 2020

AbstractCardiovascular diseases are one of the leading causes of death globally. Among various cardiovascular diseases, myocardial infarction is an important one. Compared with conventional treatments, cardiac tissue engineering provides an alternative to repair and regenerate the injured tissue. Among various types of materials used for tissue engineering applications, silk biomaterials have been increasingly utilized due to their biocompatibility, biological functions, and many favorable physical/chemical properties. Silk biomaterials are often used alone or in combination with other materials in the forms of patches or hydrogels, and serve as promising delivery systems for bioactive compounds in tissue engineering repair scenarios. This review focuses primarily on the promising characteristics of silk biomaterials and their recent advances in cardiac tissue engineering.
Review of Integrin‐Targeting Biomaterials in Tissue Engineering
Authors: Dhavalikar Prachi , Robinson Andrew , Lan Ziyang , Jenkins Dana , Chwatko Malgorzata , Salhadar Karim , Jose Anupriya , Kar Ronit , Shoga Erik , Kannapiran Aparajith , Cosgriff‐Hernandez Elizabeth 
Published: September 2020

AbstractThe ability to direct cell behavior has been central to the success of numerous therapeutics to regenerate tissue or facilitate device integration. Biomaterial scientists are challenged to understand and modulate the interactions of biomaterials with biological systems in order to achieve effective tissue repair. One key area of research investigates the use of extracellular matrix‐derived ligands to target specific integrin interactions and induce cellular responses, such as increased cell migration, proliferation, and differentiation of mesenchymal stem cells. These integrin‐targeting proteins and peptides have been implemented in a variety of different polymeric scaffolds and devices to enhance tissue regeneration and integration. This review first presents an overview of integrin‐mediated cellular processes that have been identified in angiogenesis, wound healing, and bone regeneration. Then, research utilizing biomaterials are highlighted with integrin‐targeting motifs as a means to direct these cellular processes to enhance tissue regeneration. In addition to providing improved materials for tissue repair and device integration, these innovative biomaterials provide new tools to probe the complex processes of tissue remodeling in order to enhance the rational design of biomaterial scaffolds and guide tissue regeneration strategies.
High‐Strength Hydrogel Attachment through Nanofibrous Reinforcement
Authors: Zhao Jiacheng , Kirillova Alina , Kelly Cambre N. , Xu Heng , Koshut William J. , Yang Feichen , Gall Ken , Wiley Benjamin J. 
Published: September 2020

AbstractThe repair of a cartilage lesion with a hydrogel requires a method for long‐term fixation of the hydrogel in the defect site. Attachment of a hydrogel to a base that allows for integration with bone can enable long‐term fixation of the hydrogel, but current methods of forming bonds to hydrogels have less than a tenth of the shear strength of the osteochondral junction. This communication describes a new method, nanofiber‐enhanced sticking (NEST), for bonding a hydrogel to a base with an adhesive shear strength three times larger than the state‐of‐the‐art. An example of NEST is described in which a nanofibrous bacterial cellulose sheet is bonded to a porous base with a hydroxyapatite‐forming cement followed by infiltration of the nanofibrous sheet with hydrogel‐forming polymeric materials. This approach creates a mineralized nanofiber bond that mimics the structure of the osteochondral junction, in which collagen nanofibers extend from cartilage into a mineralized region that anchors cartilage to bone.
Intercalation Pseudocapacitive Zn2+ Storage with Hydrated Vanadium Dioxide toward Ultrahigh Rate Performance
Authors: Liu Nannan , Wu Xian , Fan Lishuang , Gong Shan , Guo Zhikun , Chen Aosai , Zhao Chenyang , Mao Yachun , Zhang Naiqing , Sun Kening 
Published: September 2020

AbstractThe weak van der Waals interactions enable ion‐intercalation‐type hosts to be ideal pseudocapacitive materials for energy storage. Here, a methodology for the preparation of hydrated vanadium dioxide nanoribbon (HVO) with moderate transport pathways is proposed. Out of the ordinary, the intercalation pseudocapacitive reaction mechanism is discovered for HVO, which powers high‐rate capacitive charge storage compared with the battery‐type intercalation reaction. The main factor is that the defective crystalline structure provides suitable ambient spacing for rapidly accommodating and transporting cations. As a result, the HVO delivers a fast Zn2+ ion diffusion coefficient and a low Zn2+ diffusion barrier. The electrochemical results with intercalation pseudocapacitance demonstrate a high reversible capacity of 396 mAh g−1 at 0.05 A g−1, and even maintain 88 mAh g−1 at a high current density of 50 A g−1.