Search results for: Rafael López

Items from 1 to 20 out of 265 results

article

Riemann zero mean curvature examples in Lorentz–Minkowski space

Seher Kaya, Rafael López

Mathematical Methods in the Applied Sciences > 45 > 9 > 5067 - 5085

Riemann zero mean curvature examples in the Lorentz–Minkowski space are surfaces with zero mean curvature foliated by circles contained in parallel planes. In contrast to the Euclidean case, this family of surfaces presents new and rich features because of the variety of types of circles. In this paper, we give a geometric description of these examples when the circles are contained in spacelike planes...

article

Abdominal normothermic regional perfusion in controlled donation after circulatory determination of death liver transplantation: Outcomes and risk factors for graft loss

Amelia J. Hessheimer, Gloria Rosa, Mikel Gastaca, Patricia Ruíz, more

American Journal of Transplantation > 22 > 4 > 1169 - 1181

Postmortem normothermic regional perfusion (NRP) is a rising preservation strategy in controlled donation after circulatory determination of death (cDCD). Herein, we present results for cDCD liver transplants performed in Spain 2012–2019, with outcomes evaluated through December 31, 2020. Results were analyzed retrospectively and according to recovery technique (abdominal NRP [A‐NRP] or standard rapid...

article

Neoadjuvant chemotherapy in high‐risk soft tissue sarcomas: A Sarculator‐based risk stratification analysis of the ISG‐STS 1001 randomized trial

Sandro Pasquali, Emanuela Palmerini, Vittorio Quagliuolo, Javier Martin‐Broto, more

Cancer > 128 > 1 > 85 - 93

Background The value of neoadjuvant chemotherapy in soft tissue sarcoma (STS) is not completely understood. This study investigated the benefit of neoadjuvant chemotherapy according to prognostic stratification based on the Sarculator nomogram for STS. Methods This study analyzed data from ISG‐STS 1001, a randomized study that tested 3 cycles of neoadjuvant anthracycline plus ifosfamide (AI) or...

article

Ecology of Oobius rudnevi, egg parasitoid of Cerambyx cerdo and Cerambyx welensii in oak forests

Luis M. Torres‐Vila, Rafael López‐Calvo, Álvaro Sánchez‐González, F. Javier Mendiola‐Díaz

Entomologia Experimentalis et Applicata > 169 > 7 > 646 - 656

Oobius rudnevi (Nowicki) (Hymenoptera: Encyrtidae) is a gregarious egg parasitoid of Cerambyx cerdo L. and Cerambyx welensii (Küster) (Coleoptera: Cerambycidae), two well‐known large oak‐living saproxylic beetles with different pest/legal status: whereas C. cerdo is a protected species, C. welensii is considered an emerging pest. Despite the potential interest of O. rudnevi as a native parasitoid,...

article

Paradoxical capillary hemangioma during treatment with ramucirumab

Noelia Moreiras‐Arias, Víctor Cebey, Carlos Aliste, Hugo Vázquez‐Veiga, more

Dermatologic Therapy > 34 > 3 > n/a - n/a

article

Die Aktionsart in der deutschen Sprache: Eine kategoriale Unterteilung

Rafael López-Campos Bodineau

Forum Filologiczne Ateneum > 2020 > 8 > 1 > 199-226

Das Ziel dieses Artikels ist es, einige der grundlegenden Konzepte im Zusammenhang mit der kontroversen Problematik der Aktionsart in der deutschen Sprache zu untersuchen. Konkret bedeutet dies den Vorschlag einer Gliederung der traditionellen Kategorien in zwei grundlegende Bereiche (Handlungen des Zustands/Handlungen des Zustandswechsels), die wiederum nach der ingressiven, durativen und egressiven...

article

Early Holocene charcoal accumulations in the Aktun Ha cenote: Evidence of fire used by the first settlers of the Yucatán Peninsula, Mexico

Rafael López‐Martínez, Elizabeth Solleiro‐Rebolledo, Bruno Chávez‐Vergara, Jaime Díaz‐Ortega, more

Geoarchaeology > 35 > 6 > 819 - 833

An integrative methodology, including controlled heating experiments, petrography, taphonomy, systematics of charcoal fragments, solid‐state ¹³C nuclear magnetic resonance (NMR) spectroscopy, differential scanning calorimetry (DSC), and ¹⁴C dating, are used to discriminate in situ (anthropogenic) versus transported charcoal accumulations in the Ancestors Chamber at the Aktun Ha cenote and its potential...

article

Donation after circulatory death liver transplantation: consensus statements from the Spanish Liver Transplantation Society

Amelia J. Hessheimer, Mikel Gastaca, Eduardo Miñambres, Jordi Colmenero, more

Transplant International > 33 > 8 > 902 - 916

Livers from donation after circulatory death (DCD) donors are an increasingly more common source of organs for transplantation. While there are few high‐level studies in the field of DCD liver transplantation, clinical practice has undergone progressive changes during the past decade, in particular due to mounting use of postmortem normothermic regional perfusion (NRP). In Spain, uncontrolled DCD...

article

Carbon storage in a rainfed Mediterranean vertisol: Effects of tillage and crop rotation in a long‐term experiment

Luis López‐Bellido, Rafael López‐Bellido, Purificación Fernández‐García, Verónica Muñoz‐Romero, more

European Journal of Soil Science > 71 > 3 > 472 - 483

The storage of carbon (C) in cultivated soils can be increased with the adoption of different practices. The objective of this study was to determine soil organic carbon (SOC) storage in the 0‐ to 90‐cm depth profile, in four different soil layers (0–15, 15–30, 30–60 and 60–90 cm) in a long‐term (29 years) experiment established in 1986 on a rainfed Mediterranean Vertisol in southern Spain. The treatments...

article

Classification of rotational surfaces in Euclidean space satisfying a linear relation between their principal curvatures

Rafael López, Álvaro Pámpano

Mathematische Nachrichten > 293 > 4 > 735 - 753

We classify all rotational surfaces in Euclidean space whose principal curvatures κ₁ and κ₂ satisfy the linear relation

κ_{1} = a κ_{2} + b

, where a and b are two constants. As a consequence of this classification, we find closed (embedded and not embedded) surfaces and periodic (embedded and not embedded) surfaces with a geometric behaviour similar to Delaunay surfaces. Finally, we give a variational characterization...

article

Deutsche Präpositionen als Träger lexikalischer Informationen. Eine Segmentierung nach Kriterien lexikalischer Autonomie

Rafael López-Campos Bodineau

Forum Filologiczne Ateneum > 2019 > 7 > 1 > 123-141

Der vorliegende Artikel untersucht die Aufladung mit semantischer Bedeutung innerhalb der lexikalischen Kategorie der Präpositionen. Präpositionen in der deutschen Sprache sind, wie in den meisten anglo-germanischen Sprachen, im Rahmen zweier sehr bestimmter Satzglieder, der adverbialen Bestimmung und dem Präpositionalobjekt, besonders produktiv. Traditionell sind diese im ersten Fall, insbesondere...

article

Classification and Construction of Minimal Translation Surfaces in Euclidean Space

Thomas Hasanis, Rafael López

Results in Mathematics > 2020 > 75 > 1 > 1-22

A translation surface of Euclidean space $${\mathbb {R}}^3$$ R3 is the sum of two regular curves $$\alpha $$ α and $$\beta $$ β , called the generating curves. In this paper we classify the minimal translation surfaces of $${\mathbb {R}}^3$$ R3 and we give a method of construction of explicit examples. Besides the plane and the minimal surfaces of Scherk type, it is proved that up to reparameterizations...

article

Patient preference for oral chemotherapy in the treatment of metastatic breast and lung cancer

Eva María Ciruelos, María Nieves Díaz, María Dolores Isla, Rafael López, more

European Journal of Cancer Care > 28 > 6 > n/a - n/a

Objectives Although new therapies against metastatic cancer have been developed in recent decades, chemotherapy is still an important treatment option. Prolonged treatment and side‐effects are often discouraging for patients, and in many cases, therapy is only palliative, not curative. This study explores patient preference for oral or intravenous (IV) chemotherapy in the treatment of metastatic...

article

Ultra-Small Platinum Nanoparticles with High Catalytic Selectivity Synthesized by an Eco-friendly Method Supported on Natural Hydroxyapatite

S. A. Gama-Lara, R. Natividad, A. R. Vilchis-Nestor, Rafael López-Castañares, more

Catalysis Letters > 2019 > 149 > 12 > 3447-3453

The biosynthesis of Pt-nanoparticles (Pt NPs) supported on bovine bone powder was conducted by an environmentally friendly method that consists on immersing bovine bone powder into a Pt⁴⁺ metal ion solution at room temperature, atmospheric pressure and subsequent reduction by Heterotheca inuloides. It is worth pointing out that a calcination process is not required for the synthesis of this catalyst...

article

Exosome-mimetic nanoplatforms for targeted cancer drug delivery

Abi J. Vázquez-Ríos, Ángela Molina-Crespo, Belén L. Bouzo, Rafael López-López, more

Journal of Nanobiotechnology > 2019 > 17 > 1 > 1-15

Background Lack of effective tumor-specific delivery systems remains an unmet clinical challenge for successful translation of innovative therapies, such as, therapeutic oligonucleotides. In the past decade, exosomes have been suggested to be ideal drug delivery systems with application in a broad range of pathologies including cancer, due to their organotropic properties. Tumor-derived exosomes,...

article

Association of GSTP1 and ERCC1 polymorphisms with toxicity in locally advanced head and neck cancer platinum‐based chemoradiotherapy treatment

Goretti Duran, Santiago Aguín, Raquel Cruz, Francisco Barros, more

Head & Neck > 41 > 8 > 2704 - 2715

Background Platinum‐based chemoradiotherapy (CRT) is the standard treatment for locally advanced head and neck squamous‐cell carcinomas (HNSCC), and most patients experience serious toxicities. The aim of this study was to investigate the association between candidate genes involved in radiation/platinum pathways and acute toxicity of CRT to determine the predictive value of these polymorphisms for...

article

The role of clonal communication and heterogeneity in breast cancer

Ana Martín-Pardillos, Ángeles Valls Chiva, Gemma Bande Vargas, Pablo Hurtado Blanco, more

BMC Cancer > 2019 > 19 > 1 > 1-26

Background Cancer is a rapidly evolving, multifactorial disease that accumulates numerous genetic and epigenetic alterations. This results in molecular and phenotypic heterogeneity within the tumor, the complexity of which is further amplified through specific interactions between cancer cells. We aimed to dissect the molecular mechanisms underlying the cooperation between different clones. Methods...

article

LESM—An object‐oriented MATLAB program for structural analysis of linear element models

Rafael Lopez Rangel, Luiz Fernando Martha

Computer Applications in Engineering Education > 27 > 3 > 553 - 571

This paper describes the implementation of a MATLAB program based on the Object Oriented Programming paradigm for linear‐elastic analysis of one‐dimensional element models using a conventional displacement‐based procedure. The main objective is the development of an educational tool on matrix structural analysis with a didactic and well‐documented open source code, which allows any user to implement...

article

Presence and Spatial Distribution of Polynuclear Aromatic Hydrocarbons (PAHs) in Groundwater of Merida City, Yucatan, Mexico

Rafael López-Macias, Víctor Cobos-Gasca, Diana Cabañas-Vargas, Jaime Rendón von Osten

Bulletin of Environmental Contamination and Toxicology > 2019 > 102 > 4 > 538-543

The karstic aquifer of Yucatan features a high permeability, therefore, all contaminants placed in the soil surface, can reach it through infiltration along with the rain water. The purpose of the present study is to determine the spatial distribution of the aromatic hydrocarbons in the underground water of Merida City. Fifty wells inside the city were sampled. The sampling took place during the dry...

article

CTCs‐derived xenograft development in a triple negative breast cancer case

Tais Pereira‐Veiga, Manuel Abreu, Diego Robledo, Xavier Matias‐Guiu, more

International Journal of Cancer > 144 > 9 > 2254 - 2265

Triple‐negative breast cancer (TNBC) is characterized by high rates of metastasis and no available molecular targets. CTCs derived xenografts (CDX) have demonstrated to be a promising tool for understanding cancer biology. In our study, a CDX from a TNBC patient was developed for the first time. After CDX characterization, WNT signaling was found as the main mechanism related with this tumor biology...

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INFONA - science communication portal

Search results for: Rafael López

Riemann zero mean curvature examples in Lorentz–Minkowski space

Abdominal normothermic regional perfusion in controlled donation after circulatory determination of death liver transplantation: Outcomes and risk factors for graft loss

Neoadjuvant chemotherapy in high‐risk soft tissue sarcomas: A Sarculator‐based risk stratification analysis of the ISG‐STS 1001 randomized trial

Ecology of Oobius rudnevi, egg parasitoid of Cerambyx cerdo and Cerambyx welensii in oak forests

Paradoxical capillary hemangioma during treatment with ramucirumab

Die Aktionsart in der deutschen Sprache: Eine kategoriale Unterteilung

Early Holocene charcoal accumulations in the Aktun Ha cenote: Evidence of fire used by the first settlers of the Yucatán Peninsula, Mexico

Donation after circulatory death liver transplantation: consensus statements from the Spanish Liver Transplantation Society

Carbon storage in a rainfed Mediterranean vertisol: Effects of tillage and crop rotation in a long‐term experiment

Classification of rotational surfaces in Euclidean space satisfying a linear relation between their principal curvatures

Deutsche Präpositionen als Träger lexikalischer Informationen. Eine Segmentierung nach Kriterien lexikalischer Autonomie

Classification and Construction of Minimal Translation Surfaces in Euclidean Space

Patient preference for oral chemotherapy in the treatment of metastatic breast and lung cancer

Ultra-Small Platinum Nanoparticles with High Catalytic Selectivity Synthesized by an Eco-friendly Method Supported on Natural Hydroxyapatite

Exosome-mimetic nanoplatforms for targeted cancer drug delivery

Association of GSTP1 and ERCC1 polymorphisms with toxicity in locally advanced head and neck cancer platinum‐based chemoradiotherapy treatment

The role of clonal communication and heterogeneity in breast cancer

LESM—An object‐oriented MATLAB program for structural analysis of linear element models

Presence and Spatial Distribution of Polynuclear Aromatic Hydrocarbons (PAHs) in Groundwater of Merida City, Yucatan, Mexico

CTCs‐derived xenograft development in a triple negative breast cancer case

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