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1. Adriana María Alzate Echeverri y Manuel Gámez Casado. Historia calamitatum. El Real Hospital de San Lázaro de Cartagena de Indias, 1759-1807. Bogotá: Universidad del Rosario, 2023. 230 páginas.

Author: Juan Sebastián Ariza Martínez
Subjects: History (General), D1-2009, Latin America. Spanish America, F1201-3799
Abstract: En el caso de Alzate Echeverri, la publicación da continuidad a diferentes ideas desarrolladas por la autora en obras previas, específicamente en sus investigaciones sobre la historia y la alimentación en instituciones hospitalarias. Por su parte, los aportes previos de Gámez Casado sobre historia arquitectónica y militar permiten entender los cambios implementados en esta área a fines del siglo XVIII en Cartagena de Indias. En conjunto, las experiencias de investigación de ambos autores ofrecen al lector una interesante aproximación a la historia del Hospital de San Lázaro que aborda tópicos arquitectónicos, administrativos y sociales.
Published: 2024
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2. Diálisis peritoneal de inicio urgente para pacientes con enfermedad renal terminal. Una evaluación de tecnologías sanitarias

Author: Juan G. Ariza-Lozano, Linda M. Ibatá-Bernal, Susan Martínez, and Isabel C. Saravia-Bermeo
Subjects: Peritoneal dialysis. Hemodialysis. Chronic renal disease. End-stage renal disease., Special situations and conditions, RC952-1245
Abstract: Objetivo: Analizar la evidencia disponible sobre los aspectos clínicos y económicos relevantes de la diálisis peritoneal de inicio urgente (DP-IU) en comparación con la hemodiálisis de inicio urgente (HD-IU). Material y métodos: Revisión sistemática rápida con búsquedas en Medline, Embase, Cochrane Library y Clinicaltrials.gov. Los estudios incluidos fueron evaluados con herramientas de calidad. Los riesgos relativos (RR) fueron resumidos y se realizó metaanálisis de los resultados, cuando fue posible. Resultados: Se identificaron 1,303 artículos, 939 se tamizaron por título y resumen, 29 fueron evaluados en texto completo y 16 fueron seleccionados. En los estudios seleccionados participaron 2,179 pacientes en total, 1,087 en el grupo DP-IU, 915 en el grupo HD-IU y 177 en el grupo DP después de HD-IU. La DP-IU tiene efectos beneficiosos como la reducción de la mortalidad al año (RR: 0.69; IC95%: 0.51-0.92). No se evidenció que la DP-IU aumente el riesgo de complicaciones en diálisis no planificada. Por el contrario, existe una asociación entre la práctica de la DP-IU y un menor riesgo de resultados indeseables en comparación con la HD con catéter venoso central. La evidencia económica, limitada y heterogénea, sugiere que no hay un impacto incremental en los costos. Conclusiones: La DP-IU puede ser una opción efectiva, segura y accesible para el inicio urgente de diálisis en pacientes con enfermedad renal crónica que requieren inicio de diálisis no planificado.
Published: 2024
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3. Cost-utility analysis of genomic profiling in early breast cancer in Colombia

Author: Leonardo Rojas, María X. Rojas-Reyes, Diego Rosselli, Juan Guillermo Ariza, Alejandro Ruiz-Patiño, and Andrés F. Cardona
Subjects: Breast cancer, Personalized medicine, Cost-utility, Medicine (General), R5-920
Abstract: Abstract Background In Colombia, the best strategy to establish indication for adjuvant chemotherapy in early breast cancer (EBC) remains unknown. This study aimed to identify the cost-utility of Oncotype DX™ (ODX) or Mammaprint™ (MMP) tests to establish the necessity of adjuvant chemotherapy. Methods This study used an adapted decision-analytic model to compare cost and outcomes of care between ODX or MMP tests and routine care without ODX or MMP tests (adjuvant chemotherapy for all patients) over a 5-year time horizon from the perspective of the Colombian National Health System (NHS; payer). Inputs were obtained from national unit cost tariffs, published literature, and clinical trial database. The study population comprised women with hormone-receptor-positive (HR +), HER2-negative, lymph-node-negative (LN0) EBC with high-risk clinical criteria for recurrence. The outcome measures were discounted incremental cost-utility ratio (ICUR; 2021 United States dollar per quality-adjusted life-year [QALY] gained) and net monetary benefit (NMB). Probabilistic (PSA) and deterministic sensitivity analysis (DSA) were performed. Results ODX increases QALYs by 0.05 and MMP by 0.03 with savings of $2374 and $554 compared with the standard strategy, respectively, and were cost-saving in cost-utility plane. NMB for ODX was $2203 and for MMP was $416. Both tests dominate the standard strategy. Sensitivity analysis revealed that with a threshold of 1 gross domestic product per capita, ODX will be cost-effective in 95.5% of the cases compared with 70.2% cases involving MMP.DSA showed that the variable with significant influence was the monthly cost of adjuvant chemotherapy. PSA revealed that ODX was a consistently superior strategy. Conclusions Genomic profiling using ODX or MMP tests to define the need of adjuvant chemotherapy treatment in patients with HR + and HER2 −EBC is a cost-effective strategy that allows Colombian NHS to maintain budget.
Published: 2023
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4. In Vitro Activity of Allium cepa Organosulfur Derivatives against Canine Multidrug-Resistant Strains of Staphylococcus spp. and Enterobacteriaceae

Author: Alba Maroto-Tello, Tania Ayllón, María Arántzazu Aguinaga-Casañas, Juan José Ariza, Silvia Penelo, Alberto Baños, and Gustavo Ortiz-Díez
Subjects: antibiotic resistance, Allium extracts, dogs, multidrug-resistant Enterobacteriaceae, multidrug-resistant Staphylococcus spp., Veterinary medicine, SF600-1100
Abstract: Background: The increase of multi-resistant bacteria, especially Staphylococcus spp. and Enterobacteriaceae, constitutes a challenge in veterinary medicine. The rapid growth of resistance is outpacing antibiotic discovery. Innovative strategies are needed, including the use of natural products like Allium species (Allium sativum L. and Allium cepa L.), which have been used empirically for centuries to treat infectious diseases in humans and farm and aquaculture animals due to their antibacterial properties. Methods: This study aimed to evaluate the in vitro activity of two Allium-derived compounds, propyl propane thiosulfinate (PTS) and propyl propane thiosulfonate (PTSO), against multi-resistant Staphylococcus spp. (n = 30) and Enterobacteriaceae (n = 26) isolated from dogs referred to a veterinary teaching hospital in Madrid. Results and Discussion: The results indicated the in vitro efficacy of PTSO/PTS against the tested bacterial strains, and 56.7% of Staphylococcus pseudintermedius and 53.8% of Enterobacteriaceae showed sensitivity to PTS and PTSO compared with classic antibiotics. In addition, 50% of S. pseudintermedius strains resistant to erythromycin, ibofloxacin, difloxacin and orbifloxacin and 50% of Enterobacteriaceae strains resistant to tetracycline and doxycycline were sensitive to PTS and PTSO. Although studies are needed to verify their efficacy in vivo, the combined use of PTS and PTSO exhibits promise in enhancing bacterial sensitivity against S. pseudintermedius and Enterobacteriaceae infections, providing a first insight into the potential of both compounds in veterinary practice.
Published: 2024
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5. Análisis de impacto presupuestal de la introducción de fingolimod en el tratamiento de esclerosis múltiple en Colombia

Author: Diego Rosselli, Juan Guillermo Ariza, Tatiana Acosta, and Juan David Rueda
Subjects: Esclerosis Múltiple Recurrente Remitente, Estudios de Evaluación, Evaluación de Salud, Simulación por Computador (DeCS), Neurology. Diseases of the nervous system, RC346-429
Abstract: La esclerosis múltiple está asociada con discapacidad a largo plazo y un significativo impacto social. La introducción de fingolimod, un medicamento eficaz en la reducción de recaídas, en comparación con interferon beta 1a, justifica un análisis de impacto presupuestal desde la perspectiva del sistema de salud colombiano. OBJETIVO: desarrollar un análisis de impacto presupuestal, para los años 2012 a 2016 de la introducción de fingolimod en el sistema de salud de Colombia. MATERIALES Y MÉTODOS: usando la perspectiva del sistema de salud, se diseñó un modelo de impacto presupuestal para determinar el efecto que la introducción del fingolimod para el tratamiento de pacientes con esclerosis múltiple remitente recurrente tendría sobre los recursos del sistema de salud. La información clínica y de prevalencia fue obtenidas de la literatura, los costos fueron tomados de registros hospitalarios. Se realizó una simulación de Monte Carlo como parte del análisis de sensibilidad. RESULTADOS: el costo neto anual (2012-2016) para el escenario sin fingolimod fue, en miles de millones de pesos, $20,96, $22,29, $23,37, $24,68, y $25,98. En el escenario con fingolimod el costo neto fue: $21,01, $22,42, $23,50, $24,91 y $26,39. Por otro lado, fingolimod se asoció con 91 recaídas evitadas en este periodo de cinco años. La simulación de Monte Carlo no mostró diferencias significativas de los costos entre los dos escenarios. CONCLUSIÓN: considerando estos supuestos, la introducción de fingolimod en el sistema de salud colombiano no implica un impacto presupuestal significativo, y representa una importante reducción en el número de recaídas prevenidas.
Published: 2023

6. 370 años, Universidad del Rosario

Author: Martínez, Juan Sebastián Ariza, Jaimes, Sergio L. Mahecha, Buenaventura, Alejandra, Investigación gráfica, Martínez, Juan Sebastián Ariza, Jaimes, Sergio L. Mahecha, and Buenaventura, Alejandra
Published: 2023

7. Allium-Derived Compound Propyl Propane Thiosulfonate (PTSO) Reduces Vibrio Populations and Increases Body Weight of European Seabass (Dicentrarchus labrax) Juveniles

Author: Miguel Rabelo-Ruiz, Juan Manuel Peralta-Sánchez, Antonio Manuel Martín-Platero, Ana J. Ruiz, María del Mar Agraso, Laura Bermúdez, Juan José Ariza, Alberto Baños, Eva Valdivia, and Manuel Martínez-Bueno
Subjects: Allium-derived phytobiotic, body weight, European seabass (Dicentrarchus labrax) juveniles, gut microbiota, propyl propane thiosulfonate (PTSO), Therapeutics. Pharmacology, RM1-950
Abstract: The global demand for fish products is continuously increasing as the population grows, and aquaculture plays an important role in supplying this demand. However, industrial antibiotic misuse has contributed to the spread of antimicrobial resistance among pathogenic bacteria, therefore, several antibiotic alternatives have been proposed. In this study, we have analyzed the effects of Allium-derived propyl propane thiosulfonate (PTSO) in European seabass juveniles’ growth and performance. These effects were tested by measuring the body weight and analyzing the gut microbiome of fish after 89 days of feeding trial. The relative abundance of potentially pathogenic Vibrio in the foregut and hindgut of supplemented fish decreased, while Pseudomonas and Kocuria increased significantly. Alpha diversity indices significantly decreased in both gut regions of fish fed with Allium-derived PTSO supplemented diet, as well as between bacterial community composition. These results may indicate a positive effect of the supplementation in the diet with Allium-derived PTSO, reducing potentially pathogenic Vibrio and increasing body weight at the end of the experiment (89 days). However, this supplementation with Allium-derived PTSO produces changes in the diversity and composition of microbial communities, so further experiments would be necessary to explore bacterial community composition and health relationship.
Published: 2023
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8. French national survey of dog and cat owners on the deworming behaviour and lifestyle of pets associated with the risk of endoparasites

Author: Clarisse Roussel, Jason Drake, and Juan Manuel Ariza
Subjects: ESCCAP, Deworming recommendations, Risk factors, Helminths, Zoonosis, Companion animals, Infectious and parasitic diseases, RC109-216
Abstract: Abstract Background Endoparasites in dogs and cats are a concern related to pet health and zoonotic risks. Several determinants may affect the endoparasite transmission and infection of dogs and cats such as pet’s lifestyle or regional parasite distribution. Although different zoonotic endoparasites, such as Toxocara spp. and Echinococcus spp., have been identified in France, little information exists about the deworming behaviors of owners or the frequency of occurrence of risk factors associated with endoparasite infection or transmission. Deworming guidelines, such as those created by the European Scientific Counsel Companion Animal Parasites (ESCCAP), recommend a deworming frequency according to the risk of infection of every pet and the potential risk for zoonotic transmission. The objectives of this study were to explore how lifestyles of dogs and cats from France were related to a particular risk of endoparasites and assess whether deworming frequencies complied with ESCCAP recommendations. Methods French data were extracted from a database created during a recent European pet owner survey regarding endoparasitic infection risk. Dogs and cats were grouped into risk categories based upon the ESCCAP guidelines. The compliance between the actual and recommended deworming frequencies were explored among the regions surveyed. Results The majority of dogs and cats were older than 6 months, had outdoor access, had contact with children or elderly people, and lived in rural and town areas. Most of the dogs were in contact with other dogs, snails or prey (83%), and ate slugs, snails, grass or dug in the garden (68%). Likewise, most of the cats hunted outside (57%) and caught prey animals (52%). Consequently, most of the dogs (89%) and cats (53%) were considered to be in the highest-risk category (D). However, independent of the region, the average deworming compliance for dogs was poor (6%). While deworming compliance for cats in category A (low-risk) was excellent (94%), for cats in category D it was poor (6%). Conclusions Deworming compliance is needed to enhance pet health and reduce zoonotic risks. Future studies are warranted to thoroughly investigate the compliance and effectiveness of deworming protocols, and the risk factors associated with endoparasites in France.
Published: 2019
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9. Visitar y cuantificar: la población de la real cárcel de corte de Santafé según los libros de visita (1776-1783)

Author: Juan Sebastián Ariza Martínez
Subjects: cárcel, visitas, Santafé, siglo XVIII, libros de visita, crimen, History (General), D1-2009, Latin America. Spanish America, F1201-3799
Abstract: Durante el periodo colonial la cárcel fue entendida como un espacio de control utilizado por las autoridades para “limpiar” la sociedad de personas que a partir de su accionar alteraban el ordenamiento social. Los corpus legales utilizados por las autoridades coloniales establecían que toda ciudad de las Américas debía tener un espacio que fuera destinado para la custodia y guarda de los criminales; y Santafé, como capital virreinal del Nuevo Reino de Granada, contó con tres cárceles, además de cuarteles, hospitales y conventos que funcionaron como lugares de retención. Dentro de la cárcel de corte de Santafé, objeto de estudio de las siguientes líneas, se practicaron varias visitas institucionales con el fin de garantizar su correcto funcionamiento. A partir de ellas, se busca indagar acerca del funcionamiento de la cárcel, la población que en ella estaba recluida y el tipo de crímenes que se cometieron en la ciudad entre 1772 y 1800, con el fin de conocer la importancia de esta institución dentro de Santafé.
Published: 2020
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10. Antifungal Activity of Propyl-Propane-Thiosulfinate (PTS) and Propyl-Propane-Thiosulfonate (PTSO) from Allium cepa against Verticillium dahliae: In Vitro and in Planta Assays

Author: Ana Falcón-Piñeiro, Efrén Remesal, Miguel Noguera, Juan José Ariza, Enrique Guillamón, Alberto Baños, and Juan Antonio Navas-Cortes
Subjects: Verticillium wilt, onion, organosulfur compounds, olive trees, pest management, Biology (General), QH301-705.5
Abstract: Verticillium wilt, caused by Verticillium dahliae, is the most devastating soil-borne fungal disease of olive trees worldwide. Currently, there is no effective measure available to control the pathogen in diseased plants in open field conditions. Searching more effective and sustainable solutions are a priority for the olive sector. The existing alternatives for disease control include the use of biological control microorganisms and compounds of natural origin from plants, such as Alliaceae. Propyl propane thiosulfinate (PTS) and propyl propane thiosulfonate (PTSO) are two organosulfur compounds derived from Allium cepa with a widely documented antimicrobial activity. The aim of this study was to evaluate the antifungal activity of PTS and PTSO against the defoliating and non-defoliating V. dahliae pathotypes. Firstly, several in vitro tests were performed (Minimum Antifungal Concentration, susceptibility studies according to the Kirby–Bauer disk-diffusion method, antifungal activity through aerial diffusion and effect on mycelial growth). The ability of both compounds to sanitize soil was evaluated using a sterile substrate inoculated with V. dahliae. Finally, challenges in growth chambers were carried out. PTS and PTSO generated growth inhibition zones in agar diffusion and the gas phase, and the mycelial growth of all the V. dahliae strains was significantly altered. The V. dahliae population in soil was considerably reduced after the sanitization. Finally, in planta assays demonstrated the ability of these compounds to reduce disease related parameters and their contribution to control the phytopathogen. In conclusion, the results showed that the PTS and PTSO from Allium cepa display in vitro and in vivo antifungal activity against V. dahliae and suggested that both compounds could be used as natural and environmentally friendly tools for Verticillium wilt management.
Published: 2021
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11. Egg Production in Poultry Farming Is Improved by Probiotic Bacteria

Author: Juan Manuel Peralta-Sánchez, Antonio Manuel Martín-Platero, Juan José Ariza-Romero, Miguel Rabelo-Ruiz, María Jesús Zurita-González, Alberto Baños, Sonia María Rodríguez-Ruano, Mercedes Maqueda, Eva Valdivia, and Manuel Martínez-Bueno
Subjects: bacterial community, egg production, Enterococcus faecalis UGRA10, high-throughput sequencing, laying hens, probiotics, Microbiology, QR1-502
Abstract: Antimicrobial resistance (AMR) is one of the most serious threats for human health in the near future. Livestock has played an important role in the appearance of antibiotic-resistant bacteria, intestinal dysbiosis in farming animals, or the spread of AMR among pathogenic bacteria of human concern. The development of alternatives like probiotics is focused on maintaining or improving production levels while diminishing these negative effects of antibiotics. To this end, we supplied the potential probiotic Enterococcus faecalis UGRA10 in the diet of laying hens at a final concentration of 108 Colony Forming Units per gram (CFU/g) of fodder. Its effects have been analyzed by: (i) investigating the response of the ileum and caecum microbiome; and (ii) analyzing the outcome on eggs production. During the second half of the experimental period (40 to 76 days), hens fed E. faecalis UGRA10 maintained egg production, while control animals dropped egg production. Supplementation diet with E. faecalis UGRA10 significantly increased ileum and caecum bacterial diversity (higher bacterial operational taxonomic unit richness and Faith’s diversity index) of laying hens, with animals fed the same diet showing a higher similarity in microbial composition. These results point out to the beneficial effects of E. faecalis UGRA10 in egg production. Future experiments are necessary to unveil the underlying mechanisms that mediate the positive response of animals to this treatment.
Published: 2019
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12. Antilisterial Effect of a Natural Formulation Based on Citrus Extract in Ready-To-Eat Foods

Author: Juan José Ariza, David García-López, Esperanza Sánchez-Nieto, Enrique Guillamón, Alberto Baños, and Manuel Martínez-Bueno
Subjects: Listeria, natural preservatives, flavonoids, food safety, Chemical technology, TP1-1185
Abstract: Controlling Listeria in food is a major challenge, especially because it can persist for years in food processing plants. The best option to control this pathogen is the implementation of effective cleaning and disinfection procedures that guarantee the safety and quality of the final products. In addition, consumer trends are changing, being more aware of the importance of food safety and demanding natural foods, minimally processed and free of chemical additives. For this reason, the current consumption model is focusing on the development of preservatives of natural origin, from plants or microorganisms. In sum, this study aimed to evaluate the antimicrobial effectiveness of a citrus extract formulation rich in flavonoids against several L. monocytogenes and L. innocua strains, using in vitro test (agar diffusion test, minimum bactericidal concentration (MBC), and time-kill curves) and challenge test in food trials (carne mechada, salami, fresh salmon, lettuce, brine, and mozzarella cheese). The results presented in this work show that citrus extract, at doses of 5 and 10%, had a relevant antimicrobial activity in vitro against the target strains tested. Besides this, citrus extract applied on the surface of food had a significant antilisterial activity, mainly in carne mechada and mozzarella cheese, with reductions of up to eight logarithmic units with respect to the control. These results suggest that citrus extract can be considered a promising tool to improve the hygienic quality of ready-to-eat foods.
Published: 2021
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13. Allium Extract Implements Weaned Piglet’s Productive Parameters by Modulating Distal Gut Microbiota

Author: Miguel Rabelo-Ruiz, Claudia Teso-Pérez, Juan Manuel Peralta-Sánchez, Juan José Ariza, Antonio Manuel Martín-Platero, Óscar Casabuena-Rincón, Patricia Vázquez-Chas, Enrique Guillamón, María Arántzazu Aguinaga-Casañas, Mercedes Maqueda, Eva Valdivia, Alberto Baños, and Manuel Martínez-Bueno
Subjects: Allium extract, bacterial community, high-throughput sequencing, phytobiotic, piglet microbiome, productive parameters, Therapeutics. Pharmacology, RM1-950
Abstract: Antimicrobial resistance (AMR) has risen as a global threat for human health. One of the leading factors for this emergence has been the massive use of antibiotics growth-promoter (AGPs) in livestock, enhancing the spread of AMR among human pathogenic bacteria. Thus, several alternatives such as probiotics, prebiotics, or phytobiotics have been proposed for using in animal feeding to maintain or improve productive levels while diminishing the negative effects of AGPs. Reducing the use of antibiotics is a key aspect in the pig rearing for production reasons, as well as for the production of high-quality pork, acceptable to consumers. Here we analyze the potential use of Allium extract as an alternative. In this study, weaned piglets were fed with Allium extract supplementation and compared with control and antibiotic (colistin and zinc oxide) treated piglets. The effects of Allium extract were tested by analyzing the gut microbiome and measuring different productive parameters. Alpha diversity indices decreased significantly in Allium extract group in caecum and colon. Regarding beta diversity, significant differences between treatments appeared only in caecum and colon. Allium extract and antibiotic piglets showed better values of body weight (BW), average daily weight gain (ADG), and feed conversion ratio (FCR) than control group. These results indicate that productive parameters can be implemented by modifying the gut microbiota through phytobiotics such as Allium extract, which will drive to drop the use of antibiotics in piglet diet.
Published: 2021
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14. Allium-Based Phytobiotic Enhances Egg Production in Laying Hens through Microbial Composition Changes in Ileum and Cecum

Author: Miguel Rabelo-Ruiz, Juan José Ariza-Romero, María Jesús Zurita-González, Antonio Manuel Martín-Platero, Alberto Baños, Mercedes Maqueda, Eva Valdivia, Manuel Martínez-Bueno, and Juan Manuel Peralta-Sánchez
Subjects: Allium-based phytobiotic, Alliaceae extract, laying hens, gut microbiota, egg production, high-throughput sequencing, Veterinary medicine, SF600-1100, Zoology, QL1-991
Abstract: Phytobiotics (bioactive compounds extracted from plants) are one of the explored alternatives to antibiotics in poultry and livestock due to their antimicrobial activity and its positive effects on gut microbiota and productive properties. In this study, we supplemented a product based on garlic and onion compounds in the diet to laying hens at the beginning of their productive life (from 16 to 20 weeks post-hatching). The experimental group showed a significant increase in the number of eggs laid and in their size, produced in one month compared to the control. This increase in production was accompanied by microbiota changes in the ileum and cecum by means of high throughput sequencing analyses. These bacterial shifts in the ileum were mainly the result of compositional changes in the rare biosphere (unweighted UniFrac), while in the cecum, treatment affected both majority and minority bacterial groups (weighted and unweighted UniFrac). These changes in the microbiota suggest an improvement in food digestibility. The relative abundance of Lactococcus in the ileum and Lactobacillus in the cecum increased significantly in the experimental group. The relative abundance of these bacterial genera are known to have positive effects on the hosts. These results are very promising for the use of these compounds in poultry for short periods.
Published: 2021
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15. Effect of Allium Extract Supplementation on Egg Quality, Productivity, and Intestinal Microbiota of Laying Hens

Author: Paloma Abad, Natalia Arroyo-Manzanares, Juan J. Ariza, Alberto Baños, and Ana M. García-Campaña
Subjects: productivity, intestinal microbiota, laying hen, propyl propane thiosulfonate, Veterinary medicine, SF600-1100, Zoology, QL1-991
Abstract: The use of allium extract containing propyl propane thiosulfonate (PTSO) as hen feed supplement was evaluated to demonstrate its positive effect on egg production and intestinal microbiota modulation. The study was carried out on 90 laying hens whose feed was supplemented with allium extract for 28 days. Nutritional properties of eggs were not affected, whereas an improvement in productivity was observed based on the increase weight of eggs. In addition, a modulator effect on intestinal microbiota was confirmed by the increase in Lactobacillus spp. and Bifidobacterium spp., as well as by the reduction in Enterobacteriaceae populations. Finally, the preservation of egg composition was checked by monitoring the content of PTSO, using a new analytical method consisting of the use of solid phase extraction and ultra-high-performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS). Consequently, based on current results, Allium spp. extract rich in organosulfur compounds such as PTSO added to the diet had a beneficial effect on the microbiota and would seem to be a possible alternative to increase productivity, while not affecting the biochemical composition of egg. However, further studies on the effects of allium extract as feed supplement are necessary.
Published: 2020
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16. Antibacterial and Antifungal Activity of Propyl-Propane-Thiosulfinate and Propyl-Propane-Thiosulfonate, Two Organosulfur Compounds from Allium cepa: In Vitro Antimicrobial Effect via the Gas Phase

Author: Antonio Sorlozano-Puerto, Maria Albertuz-Crespo, Isaac Lopez-Machado, Lidia Gil-Martinez, Juan Jose Ariza-Romero, Alba Maroto-Tello, Alberto Baños-Arjona, and Jose Gutierrez-Fernandez
Subjects: propyl-propane-thiosulfinate, propyl-propane-thiosulfonate, antibacterial activity, antifungal activity, vapor, Medicine, Pharmacy and materia medica, RS1-441
Abstract: Propyl-propane thiosulfinate (PTS) and propyl-propane thiosulfonate (PTSO) are two volatile compounds derived from Allium cepa with a widely documented antimicrobial activity. The aim of this study was to evaluate their anti-candidiasis activity and the ability of its gaseous phase to inhibit bacterial and yeast growth in vitro. The minimum inhibitory concentration of various antifungal products (including PTS and PTSO) was determined versus 203 clinical isolates of Candida spp. through broth microdilution assay. Additionally, the antimicrobial activity through aerial diffusion of PTS and PTSO was evaluated over the growth of a collection of bacteria and yeasts cultivated in agar plates. All yeasts were susceptible to the antifungals tested, except C. glabrata and C. krusei, that showed azole resistance. PTSO (MIC50 and MIC90 ranged from 4 to 16 mg/L and 8 to 32 mg/L, respectively) was significantly more active against yeasts than PTS (MIC50 and MIC90 ranged from 16 to 64 mg/L and 32 to 64 mg/L). Values were higher than those obtained for antifungal drugs. Gaseous phases of PTS and PTSO generated growth inhibition zones whose diameters were directly related to the substances concentration and inversely related to the microbial inoculum. The quantification of PTS and PTSO levels reached in the growth media through aerial diffusion displayed a concentration gradient from the central zone to the periphery. Only P. aeruginosa ATCC 27853 showed resistance, while yeasts (C. albicans ATCC 200955 and C. krusei ATCC 6258) presented the higher susceptibility to both compounds. These results suggest that PTS and PTSO display antibacterial and anti-candidiasis activity in vitro through aerial diffusion, having potential use in human therapy.
Published: 2020
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17. Effect of Alliaceae Extract Supplementation on Performance and Intestinal Microbiota of Growing-Finishing Pig

Author: Cristian Jesús Sánchez, Silvia Martínez-Miró, Juan José Ariza, Josefa Madrid, Juan Orengo, María Arántzazu Aguinaga, Alberto Baños, and Fuensanta Hernández
Subjects: Allium spp. extract, growing-finishing pigs, growth performances, intestinal microbiota, short-chain fatty acid profile, antioxidant capacity, Veterinary medicine, SF600-1100, Zoology, QL1-991
Abstract: The aim of the present study was to ascertain whether an Allium spp. extract rich in organosulfur compounds, such as propyl thiosulfonate (PTSO), added to the feed of growing-finishing pigs at 5 g/kg enhances growth performance or affects the fecal microbiome, the levels of short-chain fatty acids, or the antioxidant capacity of the animals. Fifty male growing pigs (large white) of 23.07 ± 2.87 kg average body weight were randomly allotted to two treatments in a 103-day trial. The trial was divided into two periods, an initial growing phase (56-days) and a finishing phase (47-days). Two dietary treatments for each phase (growing and finishing) were used: a control diet (CON) and an experimental diet consisting of the control diet to which 5 g/kg of Allium spp. extract was added to substitute sepiolite (GAR). Throughout the study, body weight, average daily gain (kg/day, ADG), feed intake (kg/day), and feed conversion ratio (kg/kg) were measured, while the backfat thickness and muscle depth were determined at the end of the study. Besides, feces samples were taken for bacterial counts by means of real-time PCR and short-chain fatty acid (SCFA) profile determination, and the antioxidant capacity was assessed in serum and saliva. In the animals receiving Allium spp. extract (5 g/kg) in the feed, ADG increased (p < 0.05) throughout the trial, Salmonella spp. and Clostridium spp. counts in feces had decreased (p < 0.05) when measured on day 56, and, by day 103, Salmonella spp., Clostridium spp., and Enterobacteriaceae counts had decreased (p < 0.05) and Lactobacillus spp. counts had increased (p < 0.01) in feces. Regarding the SCFA profile in feces and antioxidant capacity measured in serum and saliva, supplementation with Allium spp. extract significantly increased the levels of propionic, isobutyric, and isovaleric acids and the percentage of total branched fatty acids, while the c2/c3 and (c2 + c4)/c3 ratios were lower (p < 0.05) in feces; the Trolox equivalent antioxidant capacity and the cupric reducing antioxidant capacity levels in serum were significantly higher in the same pigs on day 103 than on day 0. Consequently, based on the current results, Allium spp. extract rich in organosulfur compounds, added to the diet at 5 g/kg, had a beneficial effect on the microbiota and would seem to be a possible alternative for increasing the growth performance of growing-finishing pigs. However, further studies on the effects of Allium spp. supplementation on carcass quality are necessary.
Published: 2020
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18. Low-enthalpy geothermal energy resources in the Central Andes of Argentina: A case study of the Pismanta system

Author: M. González, Rodolfo Christiansen, Franco Clavel, Héctor P.A. García, Juan P. Ariza, Stefan Wohnlich, Diana Agostina Ortiz, and Myriam Patricia Martinez
Subjects: Binary cycle, 060102 archaeology, Renewable Energy, Sustainability and the Environment, business.industry, 020209 energy, Geothermal energy, Environmental engineering, Climate change, 06 humanities and the arts, 02 engineering and technology, Electricity generation, Heat flux, 0202 electrical engineering, electronic engineering, information engineering, Meteoric water, Energy transformation, Environmental science, 0601 history and archaeology, business, Geothermal gradient
Abstract: Geothermal energy resources are necessary to meet the increasing energy requirements worldwide and reduce the impact of climate change, particularly in developing countries. The aim of this study is the investigation of the low-enthalpy geothermal system of Pismanta, in the Central Andes of Argentina, to evaluate the possibility of power generation or direct use applications. Results indicate a circulation of meteoric water to the reservoir located in the Iglesia Basin, reaching a maximum depth of 2500 m. A background heat flow of 60 mW/m2 raises the temperature of the reservoir to approximately 95 °C resulting in a mean thermal gradient of 30 °C/km. The preliminary evaluation of four binary cycle energy conversion plants suggests a gross power generation range of 30–280 kW and the capacity of using the remaining heat for direct use applications such as drying of fruits, greenhouses, food processing and membrane distillation processes to solve arsenic problems in freshwater, among others.
Published: 2021
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19. ¿Remedios o ponzoñas? Aproximación al uso de la yerbatería como método curativo en el Nuevo Reino de Granada durante el siglo XVIII

Author: Juan Sebastián Ariza
Subjects: criminalidad, yerbatería, envenenamiento, nuevo reino de granada, History (General), D1-2009, Latin America. Spanish America, F1201-3799
Abstract: Durante el periodo colonial neogranadino se realizaron diferentes denuncias ante el tribunal de justicia en las que se estipulaba que había quienes ejercían los oficios curativos sin tener títulos facultativos en medicina para hacerlo. Había una tendencia a pensar que quienes usaban yerbas como métodos terapéuticos debían ser juzgados como yerbateros-envenenadores. El texto establece que los procesos criminales por envenenamiento constituyen un prisma en el que convergen varias problemáticas del periodo colonial, relacionadas con los oficios médicos, las creencias mágico-religiosas, y la delincuencia, entre otros.
Published: 2014

20. The Cuyano proto-ocean between the Chilenia and Cuyania terranes: rifting and plume interaction during the Neoproterozoic – early Palaeozoic evolution of the SW Gondwana margin

Author: Florencia L. Boedo, Juan P. Ariza, Graciela I. Vujovich, Patricia Alvarado, Sofía B. Pérez Lujan, and Suzanne Mahlburg Kay
Subjects: Gondwana, Paleontology, Rift, 010504 meteorology & atmospheric sciences, Paleozoic, Margin (machine learning), Geology, 010502 geochemistry & geophysics, 01 natural sciences, 0105 earth and related environmental sciences, Terrane, Plume
Abstract: The Precordillera mafic–ultramafic belt (PMUB), located in central-western Argentina, comprises mafic and ultramafic bodies interlayered and/or in tectonic contact with marine siliciclastic units. Whole-rock, mineral geochemistry and Nd–Sr isotope analyses performed in magmatic rocks suggest a relatively different spatial and temporal evolution along the belt. The southern PMUB (south of 32° S) evolved as an intra-continental rifted margin with an enriched mid-ocean-ridge basalt (E-MORB) tholeiitic to alkaline magmatism, to a proto-ocean basin (the Cuyano proto-ocean) with tholeiitic normal-MORB geochemical signature. Based on neodymium model ages (TDM), the magmatic activity started during the late Neoproterozoic Era and continued into the early Palaeozoic Era. Instead, the northern PMUB (28–32° S) evolved as an intra-continental rifted margin with dominant tholeiitic E-MORB to continental flood basalt (CFB) magmatism during the early Palaeozoic Era. ϵNd values (+3.4 to +8.4), rare earth element trends and high-field-strength element systematics, together with an estimated potential mantle temperature of c. 50–100°C above ambient mantle, suggest the PMUB magmatism derived from an enriched mantle source related to the effect of a rising plume linked to the Iapetus Ocean opening. In particular, TDM estimations of 600–550 Ma agree with reported magmatism in central to southern Appalachians. The magmatism in the PMUB, and those registered in the Neoproterozoic Catoctin Formation and in the Southern Oklahoma Aulacogen in the conjugated Laurentian margin, seem to be contemporaneous, sharing a similar plume-enriched mantle source. In this context, the E-MORB signature identified along the PMUB can be described as a plume-distal ridge tectonic setting over an extended margin.
Published: 2021
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21. Reseña de 'Discurso farmacéutico sobre los cánones de Mesue' de Miguel Martínez de Leache

Author: Juan Sebastián Ariza
Subjects: History (General), D1-2009, Latin America. Spanish America, F1201-3799
Published: 2011

22. Uso del recurso didáctico en el proceso enseñanzaaprendizaje en el periodo 2005-2012 en la LEBEM

Author: Angie Lorena Mendoza López, Jhon Alexander Carrión Campo, Juan Manuel Ariza Pedraza, and Josué Jaramillo Muñoz
Subjects: Recursos didácticos, investigación documental, unidades didácticas, enseñanza, metodología de enseñanza, análisis y reflexión sobre la enseñanza, Technology, Science
Abstract: La comunicación propuesta pretende presentar una descripción de las fases por desarrollar en la fase I del proyecto de investigación “desarrollo de las prácticas en LEBEM en el periodo 2005-2012” del grupo de investigación CRISALIDA, adscrito a la Universidad Distrital, se presentaran los momentos en los que se desarrollara la investigación, la cual es de tipo documental y se basara en las unidades didácticas como instrumento de indagación y reflexión, específicamente este grupo de pasantes centrara la mirada en el énfasis de la práctica II, buscando evidenciar qué entendimientos y evoluciones se han presentado en torno a los recursos didácticos en el aula de matemáticas y su papel como herramienta de apoyo a procesos de enseñanza-aprendizaje.
Published: 2013
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23. Geophysical evidence of first stages of inflation in Domuyo volcanic center in northwestern Neuqu ́en province, Argentina

Author: Marianela Lupari, Laura Beatriz Godoy, Mario Gimenez, Juan P. Ariza, Iván Melchor, Silvina Nacif, Stefanie Pechuan, Héctor P.A. García, Alberto Tomás Caselli, and Sebastián Correa-Otto
Subjects: Inflation, 010506 paleontology, geography, geography.geographical_feature_category, Domuyo, media_common.quotation_subject, Geology, 010502 geochemistry & geophysics, 01 natural sciences, Archaeology, purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], Volcano, Volcanism, Geothermal Field, Micro Seismicity, Thermal Anomaly, Center (algebra and category theory), Ciencias Exactas y Naturales, 0105 earth and related environmental sciences, Earth-Surface Processes, media_common
Abstract: Cerro Domuyo, in northwestern Neuquén province of Argentina, shows notable geothermal activity, although it is located at a considerable distance from the actual volcanic arc. Many studies have been developed in this area with the aim of investigating its geothermal field. Despite these efforts, the characterization of the dynamic activity in the area is still poorly known. This work shows the results of a network of seismological stations, which registered volcano-tectonic, long-period and hybrid events. A large number of volcano-tectonic events concentrated mostly in the Cerro Domuyo geothermal area were detected. These events can be divided into two groups, those that occurred at shallow depths below the geothermal area and those at greater depths below the high region of Cerro Domuyo. Shallow events were located around the Manchana Covunco fault and many of them were particularly clustered at its intersection with the Humazo fault. Seismicity in the area shows that these faults are continually active due to fluid movement, as was evidenced by the hydrothermal manifestation of the Humazo in 2003. Moreover, new studies provide evidence that the Cerro Domuyo is experiencing an important inflation caused by a magmatic body. Deep volcano-tectonic events are evidencing this activity. Considering the large distance between the actual volcanic arc and the study region, and the high density of shallow volcano-tectonic events, it is highly likely that this magmatic body is increasing the geothermal activity. Additionally, the aeromagnetic anomaly over Cerro Domuyo is showing a thin magnetic crust of less than 6 km, suggesting a clear link between the geophysical results and the inflation in Cerro Domuyo. Fil: Godoy, Laura Beatriz. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Nacif Suvire, Silvina Valeria. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Lupari, Marianela Nadia. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Garcia, Hector Pedro Antonio. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Correa Otto, Sebastian Ariel. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Fernandez Melchor, Ivan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina Fil: Pechuan Canet, Stefanie Nadia. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Ariza, Juan Pablo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Gimenez, Mario Ernesto. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Caselli, Alberto Tomás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
Published: 2020

24. Structural setting of the Chanic orogen (Upper Devonian) at central-western Argentina from remote sensing and aeromagnetic data. Implications in the evolution of the proto-Pacific margin of Gondwana

Author: Sofía B. Pérez Lujan, Juan P. Ariza, Rodolfo Christiansen, Patricia Martinez, Marcos Sánchez, Graciela I. Vujovich, and F.L. Boedo
Subjects: BAND RATIOS, 010504 meteorology & atmospheric sciences, Paleozoic, THICK-SKINNED-DOMINATED OROGENS, 010502 geochemistry & geophysics, OPHIOLITE, 01 natural sciences, Devonian, Ciencias de la Tierra y relacionadas con el Medio Ambiente, purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], AEROMAGNETIC ANOMALIES, Geología, Extensional tectonics, Late Devonian extinction, 0105 earth and related environmental sciences, Earth-Surface Processes, Remote sensing, Geology, Gondwana, Basement (geology), Ordovician, Mafic, CIENCIAS NATURALES Y EXACTAS, ARGENTINE WESTERN PRECORDILLERA
Abstract: The basement of the Central Andes located in central-western Argentina (31º20′S - 69º22′W) is composed by the Cuyania and Chilenia terranes which were amalgamated to Gondwana in the Early-Mid Paleozoic. Between the Precordillera (Cuyania) and Frontal Cordillera (Chilenia) there are exposures of marine metasedimentary rocks associated with mafic rocks with an E-MORB chemical signature that represent the remnants of an extensional basin developed between both terranes. The stratigraphic features and the distribution of the Early-Mid Paleozoic units along the Western Precordillera were constrained by remote sensing techniques. This allowed us to identify two stages in the evolution of the sedimentary in-fill of the marine basin: an initial stage (Mid-Late Ordovician) marked by widespread extensional tectonics and a finning-upwards sequence interbedded with volcanic-plutonic mafic rocks; and a Late Ordovician?-Devonian where the sedimentation was characterized by the development of coarsening-upwards sequences with low participation of mafic rocks. Flattened parallel folds associated with pre-Andean thrusts have locally a top-to-the SW vergence. These pre-Andean (Late Devonian) structures are the relics of the Chanic orogen whose double vergence is the result of the control exerted by previous structures related to the ordovician rifting. This is constrained by the residual and regional magnetic anomalies which reflect an important correlation between deep and surface structures. We propose the inception of a subduction zone with an eastward polarity on the proto-Pacific margin of Gondwana as the responsible for the compressive geotectonic framework that led to the closure of the Western Precordillera basin during the Late Devonian and the development of the Chanic thick-skinned-dominated orogen. Fil: Ariza, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina Fil: Boedo, Florencia Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Sanchez, Marcos Ariel. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Christiansen, Rodolfo Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina Fil: Perez Lujan, Sofia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina Fil: Vujovich, Graciela Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Martínez, Myriam Patricia. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina
Published: 2018
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25. Miguel Martínez de Leache. Prólogo y transcripción de María Paula Ronderos. 'Discurso farmacéutico sobre los cánones de Mesue'. Bogotá: Instituto Colombiano de Antropología e Historia, 2010. 316 pp.

Author: Juan Sebastián Ariza Martínez
Subjects: History (General), D1-2009, Latin America. Spanish America, F1201-3799
Published: 2011

26. The mafic-ultramafic belt of the Argentine Precordillera: A geological synthesis

Author: Juan P. Ariza, S.B. Pérez Luján, Florencia L. Boedo, and Graciela I. Vujovich
Subjects: 010506 paleontology, Continental crust, Geochemistry, Geology, Orogeny, 010502 geochemistry & geophysics, 01 natural sciences, Devonian, Gondwana, Continental margin, Ultramafic rock, Laurentia, 0105 earth and related environmental sciences, Earth-Surface Processes, Terrane
Abstract: In central-western Argentina, a mafic-ultramafic belt occurs throughout the western margin of the Precordillera. This belt is interpreted as the suture zone between the Cuyania terrane and the Chilenia terrane, both accreted onto the Gondwana margin during the Early Paleozoic. The belt comprises rocks from different setting and age and can be divided into a northern (28-32°S, present coordinates) and a southern sector (south of 32°S). The northern sector includes MORB (Mid-Ocean-Ridge Basalts)-like metabasalt, metagabbro and minor metadiorite and wehrlite associated to marine sequences. The southern sector comprises serpentinite, ultramafic cumulate, mafic granulite and gneiss not exposed in the north as well as metagabbro, metabasalt and minor metahyaloclastite spatially associated to marine successions. Due to their geological similarities, the southern sector can be correlated with the Argentine Frontal Cordillera mafic-ultramafic belt exposed southwestwards. In the southern sector, the evolution of the belt began during the Late Neoproterozoic, with the generation of continental margin sequences related to MORB magmatism. This extensional regime would be related to the rifting of a continental block, that includes the Cuyania and Chilenia terranes, from southern Laurentia. During the Middle Ordovician-Early Devonian, a second extensional regime occurred along the entire belt, where passive margin successions along with E-MORB magmatism developed on a thinned continental crust. A pre-Devonian deformation phase D1, possibly related to the Ocloyic orogeny, only affected the southern sector of the belt. Whereas a deformation phase D2 is registered throughout the belt and it is related to the collision of the Chilenia terrane against West Gondwana in the Middle-Late Devonian.
Published: 2021
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27. Un largo camino. Universidad del Rosario, 365 años

Author: Martínez, Juan Sebastián Ariza, Editor académico, Gómez, Laura Alejandra Buenaventura, Investigadora gráfica, Martínez, Juan Sebastián Ariza, and Gómez, Laura Alejandra Buenaventura
Published: 2018
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28. Magnetic crustal features in the Vinchina basin

Author: Cecilia Weidmann, Rodolfo Christiansen, Mario Gimenez, Juan P. Ariza, and Marcos Sánchez
Subjects: FAMATINIAN MAGMATIC ARC, Mineral, AEROMAGNETIC DATA, 010504 meteorology & atmospheric sciences, Anomaly (natural sciences), Geochemistry, Geology, Crust, Geophysics, Structural basin, 010502 geochemistry & geophysics, 01 natural sciences, Ciencias de la Tierra y relacionadas con el Medio Ambiente, DEPTH OF CURIE POINT, Infill, WESTERN SIERRAS PAMPEANAS, Curie temperature, Geología, Sedimentary rock, Magnetic anomaly, CIENCIAS NATURALES Y EXACTAS, 0105 earth and related environmental sciences, Earth-Surface Processes
Abstract: This research based on geological and geophysical data encompasses the South Central Andes region between 28 S and 31 S. We observed a region of high-magnetic susceptibility linked to sources located beneath the Vinchina basin through anomaly calculations and enhancing techniques using aerial and terrestrial magnetic data. The Curie Point Depth (CPD) obtained from the magnetic anomalies reflects a cold crust of approximately 50 km thick with CPD values of up to 40 km. These results are consistent with those obtained by other authors by means of mineral, isotopic, and thermo-chronological analysis in clay levels of the Vinchina basin sedimentary infill. Fil: Weidmann, María Cecilia. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Ariza, Juan Pablo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Sanchez, Marcos Ariel. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Gimenez, Mario Ernesto. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Christiansen, Rodolfo Omar. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Published: 2017
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29. Caracterización de la lacasa obtenida por dos métodos de producción con Pleurotus ostreatus

Author: Nubia Esperanza Ramírez, María Carolina Vargas, Juan Carlos Ariza, and César Martínez
Subjects: lacasa, Pleurotus ostreatus, fermentación en estado sólido (FES), fermentación en sumergido, isoenzimas, laccase, Biotechnology, TP248.13-248.65
Abstract: El objetivo de este trabajo fue caracterizar y evaluar diferentes métodos de purificación y separación cromatográfica de un caldo rico en enzima lacasa, producida por una variedad del basidiomycete Pleurotus ostreatus. Se llevaron a cabo dos procesos de producción, a saber: a) FES (Fermentación en Estado Sólido); b) fermentación en sumergido. El proceso de FES se basó en la producción de un extracto de caldo crudo rico en enzima lacasa a partir del crecimiento micelial sobre salvado con vinaza en relación 1:1 w/v duran te 20 días. Se obtuvo un caldo crudo con una actividad promedio de 20 U/ml. En el caso del proceso de fermentación en sumergido, se trabajó con el medio reportado por Hublick y Schinner (2000) con algunas modificaciones, y se obtuvo un crecimiento del hongo en forma de pellets, en un período de 15 días, con actividad promedio de 10 U/ml en el caldo crudo. Las isoenzimas aisladas en los procesos cromatográficos se caracterizaron de acuerdo a sus propiedades moleculares y cinéticas, se determinó su peso molecular por electroforesis de placa vertical (SDS-PAGE) y sus parámetros cinéticos, por ejemplo estabilidad, en un rango de temperatura y pH. Palabras clave: lacasa; Pleurotus ostreatus; fermentación en estado sólido (FES); fermentación en sumergido; isoenzimas; laccase; Pleurotus ostreatus; Solid State Fermentation (SSF); Submerged Fermentation; isoenzymes
Published: 2003

30. Thermal and lithospheric structure of the Chilean-Pampean flat-slab from gravity and magnetic data

Author: Juan P. Ariza, Guido M. Gianni, Gemma Acosta, Héctor P.A. García, Andrés Folguera, M. González, Myriam Patricia Martinez, and Marcos Sánchez
Subjects: Subduction, Lithosphere, Seismic tomography, Slab, Geopotential model, Crust, Geology, Mantle (geology), Seismology, Plume
Abstract: Flat subduction settings have a direct impact on the lithospheric structure and thermal state of upper plates in active margins. In particular, in the Chilean-Pampean flat subduction zone, the second largest flat subduction setting on earth, these effects have not yet been quantified, and hence, its thermal structure remains poorly understood. In order to shed light into the thermal structure and its sublithospheric controls, we analyzed high-resolution aerial and land magnetic data to determine the Curie point depth and subsequently a regional heat flow map. The comparison between the obtained thermal structure above the flat slab and previous thermal models and seismic tomographic data shows a correlation between low-velocity zones over the Nazca plate and higher heat flow areas. Besides, the Moho depth was inverted from the high-resolution gravity GECO geopotential model using different densities contrasts. We then compared these inversions with the Moho determinations from previous seismological studies observing a significant difference between them over the flat-slab region. We computed three 2D models using as constraints local seismological studies of receiver functions and tomographies to understand these discrepancies. Areas with discrepancies in Moho depth values and with shallower Curie point depths support the presence of an eclogitized lower crust beneath the thickest orogenic region and the existence of a low-velocity zone beneath the flat slab found in previous studies. Finally, these observations could indicate a potential local thinning of the subducted Nazca plate mantle lithosphere linked to the dragged plume head of the Juan Fernandez hot-spot as imaged by a recent seismic tomography survey.
Published: 2019
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31. Contributors

Author: Gemma Acosta, Ariel Almendral, Orlando Álvarez, Inés Aramendía, María Alejandra Arecco, Juan P. Ariza, C. Arriagada, Pedro Arriola, Pilar Ávila, Patrice Baby, Vanesa Barberón, Stéphanie Brichau, Ysabel Calderon, Mauricio Calderón, Gabriela Beatriz Franco Camelio, Horacio N. Canelo, Victor Carlotto, Barbara Carrapa, Ryan Cochrane, Gilda Collo, Eduardo Contreras-Reyes, Peter Copeland, Christian Creixell, Edward Cuipa, Federico M. Dávila, Peter G. DeCelles, Juan Díaz-Alvarado, A. Echaurren, Sebastián Echeverri, A. Encinas, Adrien Eude, Miguel Ezpeleta, Lucía Fernández Paz, D. Figueroa, Andrés Folguera, Gonzalo Galaz, Héctor P.A. García, Carmala N. Garzione, Sarah W.M. George, Matías C. Ghiglione, P. Giampaoli, Guido M. Gianni, Mario Gimenez, Johannes Glodny, E. Gobbo, Marcelo A. Gonzalez, E. Gabriela Gutiérrez, Camilo Higuera, Brian K. Horton, Sofía Iannelli, Lily J. Jackson, James N. Kellogg, Keith A. Klepeis, Federico Lince Klinger, Cullen Kortyna, Thomas J. Lapen, F. Lince-Klinger, Vanesa D. Litvak, C. López, Melanie Louterbach, Leonard Luzieux, Federico Martina, Myriam P. Martinez, F. Martínez, Joseph Martinod, Ezequiel García Morabito, Héctor Mora-Páez, Federico Moreno, Francisco Sánchez Nassif, C. Navarrete, Julieta C. Nóbile, Paul O’Sullivan, Soty Odoh, Verónica Oliveros, G. Olivieri, Sebastián Correa Otto, Mauricio Parra, Ana María Patiño, A. Paul, Mark Pecha, Stefanie Pechuan, Agustina Pesce, Stella Poma, Alice Prudhomme, Juan Carlos Ramírez, Miguel E. Ramos, Alexandra Robert, E. Rocha, E.A. Rojas Vera, Christian Romero, Gonzalo Ronda, Marcos A. Sánchez, Joel E. Saylor, Edward R. Sobel, Santiago R. Soler, Richard A. Spikings, Rodrigo J. Suárez, Christian Sue, Kurt Sundell, Tonny B. Thomsen, Jonathan Tobal, Cristian Vallejo, Roelant Van der Lelij, D. Villagomez, Laura E. Webb, Wilfried Winkler, and Gonzalo Zamora
Published: 2019
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32. Detection of active landslides by DInSAR in Andean Precordillera of San Juan, Argentina

Author: Aixa Inés Rodríguez, Gemma Acosta, Francisco Ruiz, Patricia Rosell, Pablo A. Euillades, Héctor P.A. García, Juan P. Ariza, Leonardo D. Euillades, Flavia Leiva, and Marcos Sánchez
Subjects: 010506 paleontology, Aerial photography, Snowmelt, Interferometric synthetic aperture radar, Geology, Landslide, 010502 geochemistry & geophysics, 01 natural sciences, Geomorphology, Natural (archaeology), 0105 earth and related environmental sciences, Earth-Surface Processes
Abstract: Landslides are downslope mass movements, which implies the combination of natural complex processes and sometimes affect anthropic resources. Many researchers inventoried landslides in the Argentinian Andean Precordillera by using aerial photography, satellite images, geomorphological analyses and GPS measures. Those located in latitudes between 31°S and 34°S have been mainly linked to seismic activity. However, due to the inaccessibility of sites, permanent monitoring has proved difficult. In this contribution, we detect three active landslides occurring in the Andean Precordillera of San Juan province using Differential Interferometric Synthetic Aperture Radar (DInSAR) based time series techniques and preliminary characterize its geomorphology. We use data provided by ESA's Sentinel 1 (C-Band SAR), Sentinel 2 (Optical) acquired between October 2014 and December 2018. The observed landslides are located at unstable hillsides oriented to the West and their deposits could potentially end in the San Juan River. As a result of the time series analysis, we interpreted that the three landslides seem to be reactivated by Illapel Mw 8.3 Earthquake (September 16th, 2015). In addition, one of them, has an acceleration at the beginning of 2016, linked to rapid snow melt.
Published: 2021
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33. 'El efecto lealtad: crecimiento, beneficios y valor último' (Recensión)

Author: Juan Antonio Ariza Montes
Subjects: Social Sciences
Published: 1997
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34. The Late Neoproterozoic-Early Paleozoic basin of the western Argentine Precordillera: Insights from zircon U-Pb geochronology

Author: Márcio Martins Pimentel, S.B. Pérez Luján, Maximiliano Naipauer, Juan P. Ariza, Florencia L. Boedo, Graciela I. Vujovich, and Silvia Barredo
Subjects: CHILENIA TERRANE, 010506 paleontology, Provenance, education.field_of_study, SEDIMENTARY PROVENANCE, Population, Geochemistry, CUYANIA TERRANE, Detritus (geology), Metamorphism, Geology, 010502 geochemistry & geophysics, 01 natural sciences, purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], Gondwana, DETRITAL ZIRCON, Geochronology, MAFIC-ULTRAMAFIC BELT, education, 0105 earth and related environmental sciences, Earth-Surface Processes, Terrane, Zircon
Abstract: In central-western Argentina, a belt including marine metasedimentary rocks and mafic-ultramafic bodies occurs throughout the western margin of the Precordillera. The belt is considered as the suture zone between the poorly known Chilenia terrane and the Cuyania terrane, part of the composite West Gondwana margin. It is assigned to the Late Neoproterozoic-Early Devonian based on fossil fauna and radiometric ages. In the southern sector of this belt, in the Peñasco area, two units crop out. The Peñasco Formation comprises metasandstone and metapelite spatially associated with mafic metavolcanic and metahyaloclastic rocks. Metagabbro bodies intrude the succession. The Garganta del León Formation consists of metasandstone and scarce metapelite where tractive and deformational sedimentary structures are preserved. Both units are affected by low-grade metamorphism, but the main foliation S1 and crenulation cleavage S2 are better developed in the Peñasco Formation rocks. U-Pb data on detrital zircon of two metasandstone samples from these units show a dominant detrital input from sources with 1.0–1.3 and 0.65–0.53 Ga ages. Detritus may come from reworked sedimentary units or from igneous/metamorphic complexes from the Cuyania terrane basement that was possibly exhumed in the Ocloyic orogen. A Gondwanan provenance for the Late Neoproterozoic-Cambrian population would also be plausible. A ca. 460 Ma zircon population in the Garganta del León Formation is interpreted to be derived from the Famatinian Arc. This would imply that the deposition of the sediment occurred after the collision of the Cuyania terrane against West Gondwana, and that the Ocloyic orogen acted as a barrier for detritus from the Famatinian Arc and other rocks further east. Fil: Boedo, Florencia Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Perez Lujan, Sofia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina Fil: Naipauer, Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotópica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina Fil: Vujovich, Graciela Irene. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Martins Pimentel, Márcio. Universidade do Brasília; Brasil Fil: Ariza, Juan Pablo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina Fil: Barredo, Silvia Patricia. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina
Published: 2020
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35. Thermo-mechanical analysis of the Andean lithosphere over the Chilean-Pampean flat-slab region

Author: M. Cecilia Weidmann, Juan P. Ariza, Andrés Folguera, Héctor P.A. García, Guido M. Gianni, Myriam Patricia Martinez, Marcos Sánchez, and Federico Lince Klinger
Subjects: CHILEAN-PAMPEAN FLAT-SLAB, 010504 meteorology & atmospheric sciences, Subduction, CURIE POINT DEPTH, HEAT FLOW, Borehole, Geology, Geophysics, 010502 geochemistry & geophysics, 01 natural sciences, Ciencias de la Tierra y relacionadas con el Medio Ambiente, Lithosphere, Thermal, Slab, Curie temperature, Meteorología y Ciencias Atmosféricas, Geothermal gradient, Foreland basin, ELASTIC THICKNESS, MAGNETIC DATA, CIENCIAS NATURALES Y EXACTAS, 0105 earth and related environmental sciences, Earth-Surface Processes
Abstract: Flat subduction segments are generally related to cold lithospheric zones, which suggest low Heat flow values and therefore a deeper Curie isotherm. In this study we perform a geophysical analysis by using high - resolution magnetic data, obtaining shallower Curie point depths through the Chilean-Pampean flat-slab zone. Then using temperatures from borehole data and Curie Point Depths, we performed a Heat Flow map which indicates the existence of mean to high thermal anomalies across the Chilean - Pampean flat-slab. These results were contrasted with Elastic Thickness map (Te) obtained from the Eigen-6C4 gravity model. Low Te values acquired indicate zones with weak mechanical behavior in correspondence to thermal anomalous zones. This spatial correlation suggests that the local high thermal anomalies are conditioning the mechanical behavior of the lithosphere in the study area and the locations of geothermal sources. Overall, our results indicate that the thermal structure of the flat-slab segment is more heterogeneous than previously thought. This has implications for evolution, maturity and fluid circulation in foreland basins of the Main and Frontal cordilleras and the Precordillera thrust belts. Finally, further studies will allow improving our database as well as extending our understanding of the thermal structure of the Chilean-Pampean flat-slab. Fil: Sanchez, Marcos Ariel. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Ariza, Juan Pablo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Garcia, Hector Pedro Antonio. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Gianni, Guido Martin. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Weidmann, María Cecilia. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Lince Klinger, Federico Gustavo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Martínez, Myriam Patricia. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Published: 2017

36. The E-MORB like geochemical features of the Early Paleozoic mafic-ultramafic belt of the Cuyania terrane, western Argentina

Author: Graciela I. Vujovich, Juan P. Ariza, F.L. Boedo, Suzanne Mahlburg Kay, and S.B. Pérez Luján
Subjects: Paleozoic, Geochemistry, Geology, Western Gondwana, Western Precordillera, Ciencias de la Tierra y relacionadas con el Medio Ambiente, Ultramafic rock, Continental margin ophiolite, Geología, Mafic, Geomorphology, CIENCIAS NATURALES Y EXACTAS, Earth-Surface Processes, Terrane
Abstract: The Argentine Precordillera is located in the central western region of Argentina, within the Central Andes. Throughout its westernmost sector, mafic and ultramafic bodies including serpentinites, mafic granulites, basaltic dikes/sills and pillow lavas are associated with metasedimentary rocks deposited in a deep marine and slope environment. These magmatic units, which are known as the Precordillera ultramafic-mafic belt, are considered to have a range of Early Paleozoic age based on published UePb zircon ages and fossil fauna. The entire sequence shows the effects of complex polyphase Paleozoic deformation and was subjected to a low grade metamorphism considered to be of middle-late Devonian age. The chemistry of the Peñasco and Cortaderas mafic dikes and sills in the southern part of this belt, which are largely plagioclase þ clinopyroxene-bearing tholeiitic basalts, is the focus of this study. These volcanic rocks all have E-MORB-like major and trace element and εNd (þ6.0 to þ9.3) signatures with similarities to those previously reported throughout the belt. The new descriptions and major and traceelement analyses presented here confirm the similarity of the E-MORB-like chemistry of the Early Paleozoic mafic rocks along the entire belt, which spans some 500 km in length. There is a general consensus that these units are exposed as a consequence of the collision of the Chilenia terrane against the Gondwana margin during the middle to late Devonian, but the details of timing, the origins of the continental blocks and the nature of the collision are still debated. The results presented support the western Precordillera basaltic dikes/sills as having formed in the early stages of oceanic rifting along the Gondwana (Precordillera) continental margin with their E-MORB-like character reflecting mixing of depleted and enriched mantle and continental lithospheric sources. Fil: Boedo, Florencia Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina Fil: Vujovich, Graciela Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina Fil: Kay, S. M.. Cornell University; Estados Unidos Fil: Ariza, Juan Pablo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Fisicas y Naturales. Instituto Geofisico Sismologico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Perez Lujan, Sofia Beatriz. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Published: 2013
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37. Reconstrucción estructural de una sección de la Precordillera Occidental Argentina (31º08’ls-69º24’lo) a partir de datos aeromagnéticos

Author: Juan P. Ariza, Graciela Irene Vujovich, Patricia Martinez, Martín Jesús Molina, Nilda Mendoza, Sofía B. Pérez Lujan, and Florencia L. Boedo
Subjects: Landslide, Fold (geology), Geología estructural, Geofísica, Ciencias de la Tierra y relacionadas con el Medio Ambiente, Precordillera Occidental, Tectonics, Datos aeromagneticos, Clastic rock, Magmatism, Geología, Fault block, Magnetic anomaly, Geomorphology, Igneous petrology, Geology, CIENCIAS NATURALES Y EXACTAS
Abstract: The magnetic anomaly profile performed along the NE-SW (31º08’LS - 69º24’LO) structural section at the western edge of the Argentine Precordillera, is presented. By the application of ratios between bands, Landsat 7 ETM+ satellite images were processed as well as aeromagnetic data by filtering methods (reduction to the pole and calculation of the residual magnetic anomaly) and emphasized magnetic anomaly (analytical signal). Two lithofacies within the Don Polo Formation (lithofacies I at the base and II at the top of the sequence) were recognised. The main structure of Villa Corral mountain range is defined by a synclinal fold with a dipping axis to the SE and similar smaller-scale folds associated, which altogether are fragmented by two landslide systems: the Pre- Andean one, oriented NW-SE inclined fault planes to the NE and top-to-the SW motion; the other, Andean, with N-S direction and inclined fault plane to the W with top-to-the E motion. The analytical signal profile shows the importance of magnetic contrasts produced by major landslides that overlap clastic metasedimentary rocks of different stratigraphic levels intruded by seams of igneous acidic rock layers. Thus, magnetic methods allow adjusting the distribution of underground units according to the relative displacement of fault blocks. Fil: Ariza, Juan Pablo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina Fil: Molina, Martin Juan. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina Fil: Mendoza, Nilda. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina Fil: Martínez, Myriam Patricia. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Vujovich, Graciela Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina Fil: Boedo, Florencia Lucila. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Perez Lujan, Sofia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
Published: 2015

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