Primeros datos sobre las necrópolis tardoantiguas de Carretera de Carmona. Hispalis

With this paper we intend to present the Later Roman necropolis found outside of the walled area of Hispalis, in the Northeatern sector of the city. Several funeral monuments, plus a wide variety of smaller tomb structures charaterize this necropolis.El objeto de este trabajo es dar a conocer la necrópolis tardoantigua localizada en el sector Noroeste de Hispalis, fuera del recinto murarío. Destaca la variedad de monumentos funerarios, así como la tipología de tumbas de menor entidad

La necrópolis tardoantigua de Carretera de Carmona. Hispalis

Romula nº 8 (2009), p. 227-256En el presente trabajo se ofrece una visión general de la necrópolis tardoantigua situada en el sector Noroeste de Hispalis. Dicha necrópolis se caracteriza por el gran número de enterramientos que la componen, por su variedad tipológica y por la monumentalidad de algunos de ellos. Este trabajo completa y amplia otros realizados por nosotros sobre el mismo tema (BARRAGÁN, 2006) en los que no se analizaban todos los enterramientos, por no encontrarse éstos aún excavados.The current paper offers a general view of the late Roman necropolis situated in the north-western sector of Seville. The above mentioned necropolis is characterised by the large number of burials that compose it, the typological variety and the monumental character of some of them. This work completes and extends another two previous ones on the same topic (BARRAGÁN, 2006), in which all the burials were not analysed as they had not yet been excavated.Versión del edito

A group of pottery belonging to late antiquity period from Atalaya de la Moranilla (Écija, Sevilla)

Romula nº 11 (2012) p. 223-247En el presente trabajo ofrecemos un estudio detallado de un conjunto cerámico localizado a mediados de los años ochenta del pasado siglo en la Atalaya de la Moranilla (Écija), hallazgo que, por sus características formales, se podría vincular a una necrópolis tardoantigua.This paper offers a detailed study of a collection of pottery found in Atalaya de Moranilla (Ecija, Seville) in the mid - eighties of the past century. The formal characteristics and conservation of the pieces links them to a Late Roman necropolisVersión del edito

Un conjunto de cerámica tardoantigua procedente de la Atalaya de la Moranilla (Écija, Sevilla) = A group of pottery belonging to late antiquity period from Atalaya de la Moranilla (Écija, Sevilla)

En el presente trabajo ofrecemos un estudio detallado de un conjunto cerámico localizado a mediados de los años ochenta del pasado siglo en la Atalaya de la Moranilla (Écija), hallazgo que, por sus características formales, se podría vincular a una necrópolis tardoantigua.---------------------------------------------------------------This paper offers a detailed study of a collection of pottery found in Atalaya de Moranilla (Ecija, Seville) in the mid - eighties of the past century. The formal characteristics and conservation of the pieces links them to a Late Roman necropolis

La necrópolis tardoantigua de Carrtera de Carmona. Hispalis

En el presente trabajo se ofrece una visión general de la necrópolis tardoantigua situada en el sector Noroeste de Hispalis. Dicha necrópolis se caracteriza por el gran número de enterramientos que la componen, por su variedad tipológica y por la monumentalidad de algunos de ellos. Este trabajo completa y amplia otros realizados por nosotros sobre el mismo tema (BARRAGÁN, 2006) en los que no se analizaban todos los enterramientos, por no encontrarse éstos aún excavados.--------------------------------------------------------------------The current paper offers a general view of the late Roman necropolis situated in the north-western sector of Seville. The above mentioned necropolis is characterised by the large number of burials that compose it, the typological variety and the monumental character of some of them. This work completes and extends another two previous ones on the same topic (BARRAGÁN, 2006), in which all the burials were not analysed as they had not yet been excavated

El peristilo de la calle Cava y su inserción en la trama urbana de la Colonia Augusta Firma Astigi (Écija, Sevilla)

En este trabajo presentamos una estructura hidráulica documentada en la excavación llevada a cabo en la calle Cava número 29 de Écija (Sevilla), identificada con una fuente o estanque que decoraría el peristilo de una rica domus situada en el sector meridional de la Colonia. Se propone igualmente una nueva hipótesis de la red viaria para esta zona, que se articula de forma coherente con los restos domésticos analizados. Palabras clave: Écija (Sevilla), Colonia Augusta Firma Astigi, arquitectura doméstica, urbanismo, peristilo, estanque, viridarium, cerámica romana, red viaria.---------------------------------------------------------------------In this paper we present an analysis of a hydraulic structure that was documented during an excavation carried out at Cava St. 29, Ecija (Sevilla). The structure has been identified as a fountain or pond that decorated the peristyle of an ornate domus located in the southern sector of the colony. We also proposed a new hypothesis of the road network for this area, which is articulated in a manner consistent with domestic remains analysed. Keywords: Colonia Augusta Firma Astigi, domestic architecture, Ecija (Sevilla), peristyle, pond, road network, Roman ceramics, urbanism, viridarium

Electrospun lignin-PVP nanofibers and their ability for structuring oil

This work explores the electrospinnability of low-sulfonate Kraft lignin (LSL)/polyvinylpyrrolidone (PVP) solutions in N,N-dimethylformamide (DMF) and the ability of the different micro- and nano-architectures generated to structure castor oil. LSL/PVP solutionswere prepared at different concentrations (8–15wt%) and LSL:PVP ratios (90:10–0:100) and physico-chemically and rheologically characterized. The morphology of electrospun nanostructures mainly depends on the rheological properties of the solution. Electrosprayed nanoparticles or micro-sized particles connected by thin filamentswere obtained fromsolutionswith lowLSL/PVP concentrations and/or high LSL:PVP ratios,whereas beaded or bead-free nanofibers were produced by increasing concentration and/or decreasing LSL:PVP ratio, due to enhanced extensional viscoelastic properties and non-Newtonian characteristics. Electrospun LSL/PVP nanofibers are able to form oleogels by simply dispersing them into castor oil at concentrations between 10 and 30 wt%. The rheological properties of the oleogels may be tailored bymodifying the LSL:PVP ratio and nanofibers content. The potential application of these oleogels as bio-based lubricants was also explored in a tribological cell. Satisfactory friction and wear results are achieved when using oleogels structured by nanofibers mats with enhanced gel-like properties as lubricants. Overall, electrospinning of lignin/ PVP solutions can be proposed as a simple and effective method to produce nanofibers for oil structuringThis work is part of a research project (RTI2018-096080-B-C21) sponsored by the MICINN-FEDER I+D+i Spanish ProgrammeFunding for open access charge: Universidad de Huelva / CBU

Influence of surfactants on the electrospinnability of lignin‑PVP solutions and subsequent oil structuring properties of nanofiber mats

This work focuses on the improvement of the electrospinnability of low-sulfonate lignin (LSL)/polyvinylpyrrolidone (PVP) solutions by the addition of surfactants (SDS, CTAB and Tween-20) as well as on the ability of resulting nanofibers to structure castor oil. Solutions with two LSL/PVP weight ratios (70:30 and 90:10) in DMF were prepared by adding variable surfactant concentrations (0–1 wt.%), and physicochemically characterized. Electrical conductivity, surface tension and rheological measurements were performed. Variations of these physicochemical properties were explained on the basis of surfactant-polymer interactions. The addition of surfactants to LSL/PVP solutions improves electrospinnability, producing more compact and uniform fiber mats in 70:30 LSL/PVP systems, generally reducing the average diameter of the nanofibers and the number of beads. In contrast, nanofiber mats were not obtained with 90:10 LSL/PVP solutions, but different nanostructures composed of particle clusters. Dispersions of nanofiber mats obtained by electrospinning from 70:30 LSL/PVP solutions in castor oil were able to generate physically stable strong oleogels. In general, linear viscoelastic functions of oleogels increased with surfactant concentration. In addition, these oleogels exhibited excellent lubrication performance in a tribological contact, with extremely low values of the friction coefficient and wear diameters, which may lead to potential applications as lubricants.Research project (RTI2018-096080-B-C21) funded by MCIN/ AEI/10. 13039/ 501100011033 and by “ERDF A way of making Europe.” Funding for open access charge Universidad de Huelva/CBU

Impact of the Morphology of Electrospun Lignin/Ethylcellulose Nanostructures on Their Capacity to Thicken Castor Oil

This study reports on a novel strategy for manufacturing thickened gel-like castor oil formulations by dispersing electrospun lignin/ethylcellulose nanostructures. These thickened formulations were rheologically and tribologically evaluated with the aim of being proposed as alternative ecofriendly lubricating greases. Low-sulfonate kraft lignin (LSL) and ethylcellulose (EC) were dissolved in a DMAc:THF mixture at different concentrations (8, 10, and 15 wt.%) and LSL:EC ratios (50:50, 70:30, and 90:10) and subjected to electrospinning. The resulting electrospun nanostructures were morphologically characterized. EC acting as the cospinning polymer improved both LSL spinnability and the oil structuring ability. Solutions with a high lignin content achieved microsized particles connected by fibrils, whereas solutions with a high EC content (50:50 ratio) and LSL/EC total concentration (10 and 15 wt.%) yielded beaded or bead-free nanofibers, due to enhanced extensional viscoelastic properties and nonNewtonian characteristics. The gel-like properties of electrospun nanostructure dispersions in castor oil were strengthened with the nanostructure concentration and the EC:LSL ratio, as a result of the formation of a more interconnected fiber network. The oleodispersions studied exhibited a satisfactory frictional response in a tribological contact, with friction coefficient values that were comparable to those achieved with traditional lithium-lubricating greases: This work was supported by MCIN/AEI/10.13039/501100011033, by “ERDF—A way of making Europe” (grant number: RTI2018-096080-BC21) and by Junta de Andalucía/EPIT2020-UHU (grant numbers: PY20_00751 and UHU202029) by the FEDER European Programm

Electrohydrodynamic Processing of PVP-Doped Kraft Lignin Micro- and Nano-Structures and Application of Electrospun Nanofiber Templates to Produce Oleogels

The present work focuses on the development of lignin micro- and nano-structures obtained by means of electrohydrodynamic techniques aimed to be potentially applicable as thickening or structuring agents in vegetable oils. The micro- and nano-structures used were mainly composed of eucalyptus kraft lignin (EKL), which were doped to some extent with polyvinylpyrrolidone (PVP). EKL/PVP solutions were prepared at different concentrations (10–40 wt.%) and EKL:PVP ratios (95:5–100:0) in N, N-dimethylformamide (DMF) and further physico-chemically and rheologically characterized. Electrosprayed micro-sized particles were obtained from solutions with low EKL/PVP concentrations (10 and 20 wt.%) and/or high EKL:PVP ratios, whereas beaded nanofiber mats were produced by increasing the solution concentration and/or decreasing EKL:PVP ratio, as a consequence of improved extensional viscoelastic properties. EKL/PVP electrospun nanofibers were able to form oleogels by simply dispersing them into castor oil at nanofiber concentrations higher than 15 wt.%. The rheological properties of these oleogels were assessed by means of small-amplitude oscillatory shear (SAOS) and viscous flow tests. The values of SAOS functions and viscosity depended on both the nanofiber concentration and the morphology of nanofiber templates and resemble those exhibited by commercial lubricating greases made from traditional metallic soaps and mineral oilsThis work is part of a research project (Ref. RTI2018-096080-B-C21) sponsored by the MICINN-FEDER I+D+i Spanish Programme. The authors gratefully acknowledge their financial support. J.F.R.-V. acknowledges receiving the Ph.D. Research Grant PRE2019-090632 from MICINN (Spain