ABSTRACT The solid state thione-thiol equilibrium in 4,6-diphenyl-3,4-dihydropyrimidine-2(1H)-thione (C16H14N2S) is analyzed through three different techniques, viz: Single Cristal X-Ray Diffraction (SCXRD), Nuclear Magnetic Resonance (NMR) and Fourier Transformed Infra-Red spectroscopy (FTIR), each one providing complementary information to the solution of the problem. The existence of thione-thiol equilibrium is firmly established, both in solution (by HNMR techniques) as in the solid state (by FTIR methods), and even if no traces of the thiol form could be found via SCXRD, some hints about the way in which the coexistence of both forms could be structurally achieved are provided by the structural analysis. In order to confirm the existence of this equilibrium, theoretical calculations were carried out at the B3LYP/6-311G(d,p) level theory, and a double proton transfer reaction is proposed.

Abstract: Introduction: Diagnosis and management of congenital and traumatic articular ailments carry an additional problem in young people. Arthroscopy has improved treatment of these injuries, which are more frequent. Objective: To describe the experience of arthroscopic handling in pediatric patients affected with knee disease, managed at a third level hospital in Puebla, Mexico. Material and methods: Descriptive, retrospective, cross sectional study performed in patients having knee disease, admitted at Unidad Médica de Alta Especialidad Hospital de Traumatología y Ortopedia Puebla, from March first, 2015 to February 28th, 2018. Lysholm and IKDC functional scales and Tegner functional satisfaction scale were applied at zero, six and twelve months. Student’s t and Wilcoxon tests were used. Results: 29 young ones of five to 17 years of age became recruited, slightly more women (62.06%). The most frequently affected limb was the left one, with 55.17%. The disorders found are: discoid meniscus, harm of the anterior cruciate ligament, idiopathic inflammatory synovitis, tumor, meniscal injury, chondral damage, patellar hyperlaxity. Lysholm and IKDC registered improvement from the first semester. Tegner registered their ability to go back to previous daily occupations. On the Lysholm scale, there was improvement at six months. On the Tegner scale there was complete incorporation to their activities (previous to the presentation and surgical intervention). At six months subsequent to treatment, the IKDC evidenced improvement and recovery, and reintegration to their activities. Statistically significant differences (p ≤ 0.01) resulted, in measurements at zero, six and 12 months. Conclusions: Congenital and traumatic illnesses were found, the latter ones sports related. Arthroscopic approach registered positive functional results in these children.

Resumen: Introducción: El diagnóstico y manejo de numerosos trastornos articulares congénitos y traumáticos revisten un problema adicional en la población joven. La artroscopía ha mejorado el tratamiento de estas lesiones cada vez más frecuentes. Objetivo: Describir la experiencia de la aproximación artroscópica en enfermos pediátricos quienes presentan patología de rodilla, admitidos en un tercer nivel de atención en Puebla, México. Material y métodos: Estudio descriptivo, retrospectivo, transversal, realizado en pacientes niños con problemas de rodilla, atendidos por artroscopía, del primero de Marzo 2015 al 28 de Febrero 2018. Se les aplicaron las escalas funcionales de Lysholm e IKDC y de satisfacción funcional de Tegner al momento de la lesión, a los seis y a los doce meses. Se utilizó t de Student y Wilcoxon. Resultados: Se reclutaron 29 jóvenes de cinco a 17 años de edad con mayor porcentaje de mujeres (62.06 %). El miembro más afectado fue el izquierdo con 55.17%. Las patologías fueron: menisco discoide, traumatismo de ligamento cruzado anterior, sinovitis inflamatoria idiopática, tumoración, lesión meniscal, daño condral, hiperlaxitud rotuliana. En dichas escalas Lysholm e IKDC se halló mejoría desde el primer semestre. En la escala Tegner hubo incorporación completa a sus actividades previas al padecimiento. Se encontraron diferencias estadísticamente significativas (p ≤ 0.01) en las comparaciones de sus funciones a los cero, seis y doce meses de evolución. Conclusiones: Se encontraron daños de frecuencia congénita y traumática, éstas relacionadas al deporte; a través del tratamiento artroscópico hubo resultados funcionales favorables en esa población pediátrica.

Resumen: En este artículo se analiza el alcance y densidad de la gubernamentalidad moderna liberal en el devenir histórico del Estado nacional venezolano, desde su fundación en 1830 hasta la década de los años 60 del siglo pasado, de lo que se trata, es de distinguir el impacto de los regímenes biopolíticos en dos momentos, la Venezuela agraria del siglo XIX y las primeras décadas de la Venezuela petrolera. El afianzamiento de una gubernamentalidad liberal que apenas pudo ser esbozada en el siglo XIX, se despliega a partir del poderío financiero que aportó el usufructo de la renta petrolera.

Abstract: This article analyses the scope and density of modern liberal governmentality in the Venezuelan nation-state, from its inception in 1830 up to the 1960s. By doing this we aim at distinguishing the impact of biopolitical regimes at two times -agrarian Venezuela in the 19th century and the early decades of oil-producing Venezuela. The strengthening of a liberal governmentality that only reached some of an outline in the 19th century was deployed on the basis of the financial power provided by the usufruct of oil profits.

Resumo: Nesse artigo se analisa a abrangência e densidade da governamentalidade moderna liberal no devir histórico do Estado nacional venezuelano, desde sua fundação em 1830 até a década dos 60 do século passado. Isso com o intuito de distinguir o impacto dos regimes biopolíticos em dois momentos: a Venezuela agrária do século XIX e as primeiras décadas da Venezuela petroleira. A consolidação da governamentalidade liberal, que apenas pôde ser esboçada no século XIX, desenvolve- se a partir do poder financeiro que proporcionou o usufruto da renda petroleira.

RESUMEN El secuestro de carbono en el suelo se refiere al proceso de transferencia de dióxido de carbono (CO2) de la atmósfera al suelo. El objetivo de esta investigación fue hacer una simulación de cómo los factores de manejo del suelo en pasturas, pueden contribuir a mitigar el cambio climático al reducir las emisiones de CO2-eq del suelo debido a los aumentos de acumulación de carbono orgánico en el suelo. En sistemas ganaderos de Cumaral (Meta), Colombia, se utilizó la metodología Tier 2 del Panel Intergubernamental sobre Cambio Climático (IPCC) para comparar los cambios en las existencias de C del suelo en (a) dos tipos de pasturas: pasturas de pasto Brachiaria decumbens (Bl) y pasturas del pasto Brachiaria decumbens asociadas con leguminosa de Pueraria phaseloi-des (B2); cuatro dosis crecientes de CaCO?: 0, l.l, 2.2, 3.3 tons ha1; y (c) tres fuentes de fertiliantes N, P, K: 100 kg ha-1 Urea, 200 kg ha-1 Superfosfato triple y 100 kg ha-1 Cloruro de potasio. El diseño estadístico fue un bloques completos al azar en arreglo factorial 2 x 4 x 3. El test de Tukey indicó que la inclusión de la leguminosa en la pastura (B2), la aplicación de 2.2 y 3.3 tons CaCO3 ha-1 en ambas pasturas y la fertilización de B1 con Urea y de B2 con Superfosfato triple presentaron un mayor beneficio en la acumulación de C del suelo y la neutralización de las emisiones de CO2-eq. El análisis de cluster adicional mostró que B2 encalada con más altas dosis de cal indistintamente del tipo de fertilizante usado presentaron mayor almacenamiento de C del suelo agrupados en el Cluster 1. Nosotros concluimos que estos factores de manejo de suelos deberían ser factibles de implementar en pasturas, lo que puede ayudar a compensar los efectos negativos del cambio climático global en los sistemas ganaderos de zonas tropicales.

ABSTRACT Soil carbon sequestration refers to the process of transferring carbon dioxide (CO2) from the atmosphere into the soil. The objective of this research was to do a simulation of how soil management factors in pastures can contribute to mitigate climate change by reducing soil CO2-eq emissions due to increases of soil organic carbon.In livestock systems of Cumaral (Meta), Colombia, IPCC Tier 2 methodology was used to compare changes in soils C stocks under (a) two pasture types: Brachiaria decumbens grass pastures (B1) and Brachiaria decumbens grass pastures associated with Pueraria phaseloides legume (B2); (b) four increasing doses of CaCO?: 0, 1.1, 2.2, 3.3 tons ha-1; (c) three sources of N, P, K fertilizers: 100 kg ha-1 Urea, 200 kg ha-1 Triple Superphosphate and 100 kg ha-1 Potassium Chloride. The statistical design was a randomized complete block in factorial arrangement 2 x 4 x 3. Tukey test indicated that the inclusion of kudzú in B. decumbens pasture (B2), 2.2 and 3.3 tons CaCO3 ha-1 in both pastures, and the fertilization of B1 with Urea and B2 with Triple Superphosphate presented a greater benefit in soil C accumulation and CO2-eq emissions neutralization. Adittional cluster analysis showed that B2 liming with higher lime doses regardless of the type of fertilizer used presented major soil C stored grouped in Cluster 1. We concluded that these soil management factors should be feasible to implement in pastures, that can help offset the negative effects of global climate change on livestock systems at tropical zones.

Abstract A relativistic, static and spherically symmetrical stellar model is presented, constituted by a perfect charged fluid. This represents a generalization to the case of a perfect neutral fluid, whose construction is made through the solution to the Einstein-Maxwell equations proposing a form for the gravitational potential gtt and the electric field. The choice of electric field implies that this model supports values of compactness u = GM / c2R ≤ 0.5337972212, wich are higher than the case without electric charge (u = 0.3581350065), being this feature of relevance to represent compact stars. In addition, density and pressure are positive functions, bounded and decreasing monotones while the electric field is a monotonously increasing function as well as satisfying the condition of causality, so the model is physically acceptable. Additionally, the internal behavior of the hydrostatic functions and their values are obtained taking as data the corresponding to a star of 1 Mʘ for different values of the charge parameter, obtaining an interval for the central density ρc ≈ (7.9545, 2.7279)1019 Kg/m3 characteristic of compact stars.

Abstract A model for low mass compact objects with compactness ratio u ≤ 0.06093 is presented here. Density, pressure and sound speed are regular and monotonic decreasing functions. The change between the central density ρc and the density on the surface ρb is lower than 3.94% and the maximum change occurs for the biggest compactness, i.e. ρc = 1.0394ρb. This allows us to apply this model for the case of compact stars in which the density variation is very small. In particular, we can use this model for PSR B0943 + 10, a quark star candidate, with radius R = 2.6 km and mass M = 0.02 Mʘ. According to our model it turns out that the density on the surface is ρb = 5.3881x1017 kg/m3 and the central density, ρc = 1.0072ρb, is slightly large than the surface density and larger than the nuclear density.

Resumo O estudo de abundância e dinâmica populacional de Plesionika narval foi efetuado com 5.255 espécimes provenientes de 62 lances de pesca realizados ao largo do arquipélago da Madeira (Atlântico Nordeste) de 2004 a 2008 entre 101 e 350 m de profundidade. A abundância oscilou entre 0,01 e 19,74 espécimes-por-armadilha com diferenças significativas entre estações provavelmente devido ao aumento da população na primavera durante o período de recrutamento. A análise da distribuição de tamanhos revelou que o comprimento da carapaça (CL) variou entre 2,45 e 28,61 mm e que o tamanho médio das fêmeas excedeu o dos machos. Verificaram-se diferenças significativas no CL médio entre estrato de profundidade e estação. Do total amostrado, 57,00% foram machos, 41,88% fêmeas e 1,42% indeterminados. A razão de sexos também diferiu significativamente entre estações de acordo com a profundidade, consolidando a hipótese da existência de migrações sazonais relacionadas com o ciclo reprodutivo desta espécie. As fêmeas ovadas apresentaram maiores tamanhos e ocorreram durante todo o ano permanecendo em águas pouco profundas no inverno, verão e outono e migrando para águas profundas na primavera. A maior frequência de fêmeas ovadas foi registada no verão, entre 151 e 200 m de profundidade reforçando a hipótese de que a desova desta espécie ocorre em águas menos profundas, especialmente no final do verão.

Abstract Analysis of abundance and population structure of Plesionika narval was performed on data concerning 5,255 specimens obtained from 62 fishing sets carried out off the Madeira archipelago (Northeastern Atlantic) between 2004 and 2008 in a depth range from 101 to 350 m. Abundance ranged from 0.01 to 19.74 specimens-per-trap and significant differences were found between seasons, probably as a result of an increment of population in the spring during the recruitment season. The analysis of size distribution revealed that the carapace length (CL) ranged from 2.45 to 28.61 mm and that mean female size consistently exceeded that of males. Differences in mean CL were statistically significant between depth strata and seasons. Of the specimens sampled, 57.00% were males, 41.88% females and 1.42% undetermined. Sex ratio also differed significantly between seasons according to depth strata, consolidating the hypothesis of the existence of seasonal migrations related with the reproductive cycle of this species. Ovigerous females showed larger sizes and occurred all year around and remain in shallow waters in winter, summer and autumn and move to deeper waters in spring. The highest frequency of ovigerous females was recorded in summer, between 151 and 200 m deep supporting the hypothesis that spawning of this species occurs in shallow waters, especially in late summer.

Resumo As relações peso-comprimento e a estatística descritiva foram estimadas para seis espécies de camarões, capturados ao largo do arquipélago da Madeira, entre 1983 e 2014, usando armadilhas de fundo e alvoradas entre os 50 e 1.300 metros de profundidade. O parâmetro b variou entre 2,36 para Plesionika ensis e 2,97 para Plesionika williamsi. Todas as espécies evidenciaram um padrão de crescimento alométrico negativo. De acordo com o conhecimento dos autores, todas as relações peso-comprimento são aqui apresentadas pela primeira vez para a área da Madeira e no caso de Ligur ensiferus e Plesionika ensis são a primeira referência mundial.

Abstract Length and weight relationships and descriptive statistics are reported for six shrimp species caught off the Madeira archipelago between 1983 and 2014 using bottom and floating traps from depths ranging from 50 to 1,300 m. The parameter b ranged between 2.36 for Plesionika ensis and 2.97 for Plesionika williamsi. All species showed a pattern of negative allometric growth. To the authors’ knowledge all weight-length relationships presented herein are recorded for the first time from the Madeira area, and in the cases of Ligur ensiferus and Plesionika ensis are the first references worldwide.

Abstract: New records of Ipomoea chiquitensis J.R.I. Wood & R.W. Scotland were discovered for the states of Ceará, Piauí, and Rio Grande do Norte, in northeastern Brazil. The species was recently described from the Chaco region in Bolivia, and is reported herein to occur in “Caatinga” vegetation. We present a brief description, distribution map, potential distribution modeling, illustration, photographs, and a comparison with related species.

Resumen: Se descubrieron nuevos registros de Ipomoea chiquitensis J.R.I. Wood & R.W. Scotland para los estados del Ceará, Piauí y Rio Grande do Norte, en el noreste del Brasil. La especie fue descrita recientemente en la región del Chaco en Bolivia y ahora se encuentra aquí en la vegetación de la "Caatinga". Se presenta una breve descripción, mapa de distribución, modelado de distribución potencial, ilustración, fotografías y una comparación con especies afines.

Abstract Background: Feeding aflatoxin-contaminated diets to shrimp juveniles reduces feed intake and growth rate, suppresses the immune system, causes hepatic lesions, and, in some cases, decreases survival rates. There is scarce information on the effectiveness of commercially available aflatoxin binders to reduce aflatoxicosis in shrimp. Goals: We investigated the effect of corn that was naturally contaminated with aflatoxins on the growth performance and nitrogen retention efficiency of white shrimp juveniles L. vannamei and the potential of three commercially available anti-aflatoxin additives. Methods: 20 tanks (60L) were stocked with 10 shrimp weighing 210±4mg. Tanks were divided into five treatments with four replicates each. Shrimp were fed twice daily with either the contaminated diet (75 μg kg-1 total aflatoxins), the contaminated diet supplemented with 2 g kg-1 Aflabalan®, 2 g kg-1 Mycosorb®, and 2.5 g kg-1 Mycoflix plus®, or the uncon taminated diet to the control group for 42 days. Results: In terms of the diet containing aflatoxin without binding agents, the consumption, growth rate, and nitrogen-retention efficiency were significantly lower than the control treatment. The experimental diets did not affect the feed conversion ratio or survival rates in any treatment. The inclusion of any of the aflatoxin binders evaluated in the present study did not produce growth rates comparable to those of shrimp fed the uncontaminated diet. Conclusions: Aflatoxins decreased growth performance in a population of white shrimp juveniles L. vannamei. Although all the aflatoxin binders evaluated in this study caused an improvement, they were not effective in reversing all the negative effects caused by feeding aflatoxin-contaminated diets to white shrimp juveniles L. vannamei.

Resumen Antecedentes: La alimentación de dietas contaminadas con aflatoxina a juveniles de camarón reduce la ingesta de ali mento, la tasa de crecimiento suprime el sistema inmunológico y causa lesiones hepáticas y en algunos casos, disminuye las tasas de sobrevivencia. Hay escasa información sobre la efectividad de los aglutinantes de aflatoxinas comercial mente disponibles para reducir la aflatoxicosis en camarones. Objetivos: Se investigó el efecto del maíz naturalmente contaminado con aflatoxinas sobre el rendimiento de crecimiento y la eficiencia de retención de nitrógeno de juveniles de camarón blanco L. vannamei y el potencial de tres aditivos anti-aflatoxina comercialmente disponibles. Métodos: 20 tanques (60L) fueron almacenados con 10 camarones con un peso de 210±4mg. Los tanques se dividieron en cinco tratamientos con cuatro repeticiones cada uno. Los camarones fueron alimentados dos veces al día con la dieta contaminada (75 μg kg-1 de aflatoxinas totales), la dieta contaminada suplementada con 2 g kg-1 de Aflabalan®, 2 g kg-1 de Mycosorb® y 2,5 g kg-1 de Mycoflix plus®, y la dieta no contaminada como grupo control durante 42 días. Resultados: Para la dieta que contenía aflatoxina sin agentes secuestrantes, el consumo, la tasa de crecimiento y la eficiencia de retención de nitrógeno fueron significativamente menores que el tratamiento de control. Las dietas experimentales no afectaron la tasa de conversión alimenticia ni las tasas de supervivencia en ningún tratamiento. La inclusión de cualquiera de los aglutinantes de aflatoxinas evaluados en el presente estudio no produjo tasas de crecimiento comparables a las de los camarones alimentados con la dieta no contaminada. Conclusiones: Las aflatoxinas disminuyeron el rendimiento de crecimiento en una población de juveniles de camarón blanco L. vannamei. Aunque todos los aglutinantes de aflatoxinas evaluados en este estudio causaron una mejora, no fueron eficaces para revertir todos los efectos negativos causados por la alimentación de dietas contaminadas con aflatoxina a juveniles de camarón blanco L. vannamei.

Abstract: In recent times, the excess of sugars in the diet is in the spotlight of the scientific community. Although there is greater evidence of the negative effect of sugary drinks on health, it is still a matter of controversy. remains a controversial issue. On the other hand, the benefits of fruit and vegetable consumption in terms of prevention of several chronic diseases are widely known and accepted. Fruit juices may provide some of these benefits, but there are doubts about their suitability due to their high sugar content. What is its role in infant feeding? Should we consider them as another sugary drink?

Resumen: En los últimos tiempos el exceso de azúcares en la dieta está en el punto de mira de la comunidad científica. Aunque cada vez existe mayor evidencia del efecto negativo de las bebidas azucaradas sobre la salud, aún sigue siendo un motivo de controversia. Por otro lado, los beneficios del consumo de frutas y verduras en cuanto a prevención de varias enfermedades crónicas son conocidos y aceptados de forma generalizada. Los zumos de frutas pueden aportar algunos de estos beneficios, pero hay dudas sobre su idoneidad debido a su alto contenido en azúcares. ¿Cuál es su papel en la alimentación infantil? ¿Debemos considerarlos como una bebida azucarada más?

Resumo Vários cruzeiros de investigação foram realizados no Atlântico Nordeste, arquipélago da Madeira entre 1991 e 2008 visando a exploração de novos recursos pesqueiros. O presente estudo contemplou a comparação da seletividade de pesca entre armadilhas de fundo e flutuantes e a análise de rendimento por recruta (YPR) e biomassa por recruta (BPR) facultando informação essencial para a gestão do camarão Plesionika narval. Um total de 28,262 especimens foram amostrados e a análise de comprimento de primeira captura retornou valores mais elevados aquando da utilização de armadilhas flutuantes, indicando que essas armadilhas são mais seletivas e exercem menos pressão sobre o recurso. A análise YPR e BPR mostrou que o estoque se encontra sob explorado para a área de estudo e recomenda a utilização de armadilhas flutuantes na pesca comercial de P. narval, que permitirão um limite máximo de exploração com rendimento superior. Os resultados sugerem que P. narval tem o potencial para suportar uma pescaria viável e sustentável mediante a utilização de armadilhas flutuantes.

Abstract Several experimental surveys were carried out in the Northeastern Atlantic, Madeira archipelago from 1991 to 2008 to explore new fisheries resources. This study examined the selectivity of bottom and floating traps and the analysis of yield-per-recruit (YPR) and biomass-per-recruit (BPR) providing helpful insight to the management of the shrimp Plesionika narval. A total of 28,262 specimens were sampled and the analysis of length at first capture returned higher values when using floating traps indicating that these traps are more selective, exerting less pressure on the resource. The YPR and BPR analysis showed that the stock is under exploited for the studied area and suggests that the use of floating traps in the commercial fisheries of P. narval is recommended, which will allow a higher maximum allowable limit of exploitation and greater yield. The results suggest that P. narval has the potential to support a viable and sustainable fishery using floating traps.

Background. Numerous studies conclude that about half of the asthmatic population is not well controlled. The aim of this study was to discuss causes, consequences and possible solutions of uncontrolled asthma (UCA). Methods. Discussion amongst asthma experts from the fields of Pneumology, Allergy and Primary Care, structured in three phases: 1) survey to get the opinion of participants involved in different areas of UCA; 2) expert meeting, in which the results of the survey were discussed, and the diagnosis, treatment and monitoring of UCA were presented and discussed; and, 3) with the main findings, 83 items were formulated and subjected to consensus among all participants through the Delphi method. Results. There was consensus on 86.7% of the items in the Delphi questionnaire, mostly in terms of agreement. Conclusions. The UCA analysis results show the need for future improvement in the following areas: to incorporate clinical performance protocols into asthma CPG to identify aggravating factors and comorbidities; to develop an inexpensive and easy-to-use tool to identify adherence; to establish patient phenotype; to analyse treatment side effects and to provide personalized treatment, especially assessing its efficacy and safety (symptom control and future risks). It is necessary to generate new evidence to determine additional tests to be used to monitor these patients.

Fundamento. Numerosos estudios constatan que aproximadamente la mitad de la población asmática no está bien controlada. El objetivo de este trabajo fue analizar entre expertos las causas, consecuencias y las posibles soluciones del asma no controlada (ANC). Material y métodos. Debate entre expertos en asma de las especialidades de Neumología, Alergología y Atención Primaria, estructurado en tres fases 1) Cuestionario para pulsar la opinión de los participantes en los diferentes elementos implicados del ANC; 2) Reunión presencial de los expertos, en la que se discutieron los resultados de la encuesta y se presentaron y debatieron ponencias sobre el diagnóstico, tratamiento y seguimiento del ANC; 3) Formulación de 83 ítems que fueron sometidos a consenso entre todos los participantes mediante el método Delphi. Resultados. El 86,7% de los ítems del cuestionario Delphi fue consensuado, mayoritariamente en términos de acuerdo. Conclusiones. El análisis de los resultados sobre el ANC señala la necesidad de mejora futura en: incorporar en las Guías de Práctica Clínica de asma un protocolo de actuación clínico para identificar agravantes y comorbilidades; desarrollar una herramienta barata y de fácil utilización que permita identificar la adherencia al tratamiento; establecer el fenotipo del paciente; analizar los efectos secundarios del tratamiento y ofrecer un tratamiento personalizado, valorando especialmente la eficacia y seguridad (control de síntomas y riesgo futuro). Se precisa generar nuevas evidencias (estudios) que determinen exploraciones complementarias a emplear en el seguimiento de estos pacientes.

Cactus prickly pear (Tuna) harvest is a complicated operation that continues in a rudimentary way, in the majority of cases manual and with the help of tools such as knives and rods which sometimes affect the fruit. In this research is analyzing the possibility of building a tool that meets the characteristics sufficient for a good harvest, one of the factors to consider is access due to the restrictive features of the cactus prickly pear (height and distribution of the joints), forcing the use of tools to achieve it (with sometimes unfavorable results). This is how arises the need to create a device that adapts to the needs and solve the problem of harvest of tuna. Field studies which were fundamental to the design, such studies were obtained measurements and tests of strength, which were carried out with instruments properly designed for the type of fruit. Generated a picker mechanism of cactus prickly pear (tunas), which according to your design could achieve a high level of harvest compared to which today has, thanks to the configuration of the mechanism and the way they get their movements lead to a suitable environment for personnel performing this activity.