Abstract Among the different handling techniques in aquaculture, the use of anesthetics has had a growing interest focused on guaranteeing animal welfare, and reducing possible stress situations during general handling. The aim of this study was to present the use of eugenol and lidocaine with non-invasive anesthesia procedures in Dormitator latifrons, in which the different stages of anesthesia (induction and recovery) were determined. One hundred and twenty healthy fish of average weight of 73.59 ± 13.53 g and standard length of 17 ± 1.36 cm were used. The experimental fish were subjected to fasting for 24 h prior to the tests. Five fish were subjected to eugenol (25, 50, 100, and 200 µL/L), and lidocaine (100, 200, 300, and 400 mg/L), in triplicate. The time to reach deep and recovery anesthesia were recorded and the data analyzed using ANOVA (α= 0.05). Organisms exposed to anesthetics evidenced early episodes of fast, short-distance swimming (initial hyperactivity) for short periods of time. Survival was 100% with both compounds and concentrations. Fish exposed to a eugenol concentration of 200 µL/L had longer anesthesia times and took longer time to recover (P<0.05). The most effective concentrations for eugenol and lidocaine were of 200 µL/L and 400 µL/L in juvenile fish, promoting rapid inductions, without compromising the conditions for the recovery of the fish. This work provides practical information for handling and transportation D. latiforns with the least possible stress and ensuring animal welfare.

Resumo Dentre as diferentes técnicas de manejo na aquicultura, o uso de anestésicos tem despertado interesse crescente voltado para a garantia do bem-estar animal, reduzindo possíveis situações de estresse durante o manejo geral. O objetivo deste estudo foi apresentar o uso de eugenol e lidocaína com procedimentos anestésicos não invasivos em Dormitator latifrons, nos quais foram determinadas as diferentes etapas da anestesia (indução e recuperação). Foram utilizados 120 peixes saudáveis, com peso médio de 73,59 ± 13,53 g e 17 ± 1,36 cm de comprimento, em jejum de 24 horas antes dos testes. Cinco peixes foram submetidos a eugenol (25, 50, 100 e 200 µL/L) e lidocaína (100, 200, 300 e 400 mg/L), em triplicata. O tempo para atingir a anestesia profunda e de recuperação foi registrado, os dados foram analisados com ANOVA (α= 0,05). Organismos expostos a anestésicos evidenciaram episódios precoces de nado rápido de curta distância (hiperatividade inicial) por curtos períodos de tempo. A sobrevivência atinge 100% com ambos compostos e concentrações. Peixes expostos a uma concentração de eugenol de 200 µL/L tiveram tempos de anestesia mais longos e demoraram mais para se recuperar (P<0,05). As concentrações mais efetivas para eugenol e lidocaína foram de 200 µL/L e 400 µL/L em peixes juvenis, promovendo induções rápidas, sem comprometer as condições de recuperação dos peixes. Este trabalho fornece informações práticas para o manejo e transporte de D. latifrons com o mínimo de estresse possível e garantindo o bem-estar animal.

Abstract This study establishes the serological frequency against Neospora caninum on day zero and the presence of N. caninum DNA surveyed throughout the gestation of Bubalus bubalis females in a bovine buffalo system in the central zone of the state of Veracruz, Mexico. Blood samples were taken from 11 females in 6 different sampling periods and analyzed for N. caninum antibodies detection on day zero. DNA detection by PCR was performed on all sampling periods. The gestation months of the females were recorded for five trimesters by ultrasonography, as well as births and pregnancy losses. Recorded seropositivity and positivity for agent DNA were 90.9% (95% CI 58.7-9.7) and 36.3% (95% CI 10.9-69.2), respectively, on day zero. N. caninum DNA was detected between 18.1% (95% CI 2.3-51.7) and 45.4% (95% CI 16.7-76.6) over the five trimesters of observation, with three births and three abortions recorded. The studied water buffalo population had a high presence of N. caninum antibodies; however, the detection of N. caninum DNA remained below 47% in the females. The association was only observed in the detection of DNA with pregnant females (P 0.007). Our results support the hypothesis of the resistance of water buffaloes to infection and the onset of clinical signs against infection by N. caninum even upon a high possibility of infection and reinfection described in this production system in Mexico.

ABSTRACT In order to provide information on the current knowledge about the native fish Dormitator latifrons and identify the gaps that must be filled to achieve correct resource management, a scientometric study was carried out using different scientific databases. A total of 103 publications were registered between the years 1972 and 2021. Results indicate that the species has been addressed since 2001 with less than one publication per year, with 2008 being the year with the highest number of publications (10). The main topics addressed were ecology, physiology, and parasitology of fish. The available knowledge generated about the species is concentrated in 68 journals, with Mexico as the most productive country, followed by USA and Ecuador, and the most productive research centers about this fish were Mexico’s Instituto Politécnico Nacional and Universidad de Guadalajara. A total of 285 authors were detected contributing knowledge to the species, with Violante-González in the top with ten publications. The co-authorship co-occurrence maps suggest there is no solid collaborative relationship between the scientific community and that the information generated is insufficient for conserving and exploiting this fish. It is essential to increase the study of thematic areas that allow their comprehensive management in the medium term; topics like reproduction in captivity, aquaculture, and nutrition must be addressed in the future to assure a sustainable use of this resource.

Resumen Antecedentes y Objetivos: El orden Coronophorales ha sido poco estudiado en México. Incluye seis familias y solo cuatro de ellas están representadas en el país. Se caracteriza por ascomas periteciales turbinados o globosos, con presencia o ausencia de estructuras quellkörper y/o poros de Munk. El objetivo de este trabajo es dar a conocer las especies de Coronophorales previamente conocidas del país y describir los nuevos registros. Métodos: Se realizaron exploraciones al azar para la recolección de ejemplares, entre 2011 y 2015, en áreas verdes urbanas y periurbanas de la ciudad de Xalapa, Veracruz, México. Se revisó material recolectado y previamente herborizado. El estudio de las muestras se hizo de acuerdo con las técnicas tradicionales en micología y todo el material estudiado está depositado en el herbario XAL. Resultados clave: Se describen 11 especies de Coronophorales. Nueve de ellas: Bertia sinensis, B. triseptata, Chaetosphaerella fusca, Fracchiaea callista, Gaillardiella pezizoides, Nitschkia collapsa, N. floridana, Tympanopsis confertula y T. uniseriata son nuevos registros para México; Fracchiaea broomeana se cita por primera vez para Veracruz y Nitschkia grevillii se registra de nuevas localidades. Se presentan dibujos o fotografías del material estudiado, además de una clave para determinar las especies hasta ahora conocidas del orden en el país. Conclusiones: El orden Coronophorales está poco representado en México. Previo a esta contribución se conocían diez especies del grupo. Sin embargo, con los nuevos registros que aquí se presentan, ahora suman 19 las especies conocidas de este grupo de hongos en el país.

Abstract Background and Aims: The order Coronophorales has been poorly studied in Mexico. It includes six families, but only four of them are represented in the country. It is characterized by turbinate or globose perithecial ascomata, with the presence or absence of quellkörper structures and/or Munk pores. The objective of this work is to present the species of Coronophorales previously known for the country and to describe the new records. Methods: Random explorations were carried out to collect specimens, between 2011 and 2015, in urban and peri-urban green areas of the city of Xalapa, Veracruz, Mexico. Material collected and previously herborized was reviewed. The study of the samples was done according to traditional techniques in mycology and all the material studied is deposited in the herbarium XAL. Key results: Eleven species of Coronophorales are described. Nine of these are new records for Mexico: Bertia sinensis, B. triseptata, Chaetosphaerella fusca, Fracchiaea callista, Gaillardiella pezizoides, Nitschkia collapsa, N. floridana, Tympanopsis confertula and T. uniseriata; Fracchiaea broomeana is recorded for the first time from Veracruz and Nitschkia grevillii is recorded from new locations. Drawings or photographs of the studied material are presented, as well as a key to determine all the species of the order known so far in the country. Conclusions: The order Coronophorales is little represented in Mexico. Prior to this contribution, ten species of the group were known; however, with the new records presented here, there are now 19 known species of this group of fungi in the country.

Resumo O Aedes aegypti é um culicida que vem ganhando relevância ao longo dos anos devido à sua capacidade de transmitir diversos vírus causadores de doenças em humanos que ao longo dos anos ocasionam altas taxas de mortalidade na população mundial. O principal problema é que Ae. aegypti tem conseguido estabelecer e manter uma relação próxima com o homem e seu habitat, por isso a busca por alternativas para o controle das populações de vetores torna-se imperativa. O objetivo do presente trabalho foi estudar os efeitos de duas cepas de Beauveria bassiana sobre Ae. aegypti. Larvas de terceiro instar de Ae. aegypti em recipientes plásticos de 250 mL foram inoculados com as cepas GHA e NB3 em diferentes concentrações (1.5 × 104, 1.5 × 105, 1.5 × 106 e 1.5 × 107 conídios/mL). A cepa NB3 apresentou os maiores valores de mortalidade com 63% na concentração mais alta, ou seja, 1.5 × 107, enquanto para a cepa GHA o maior valor de mortalidade foi 30.7% na mesma concentração. Os resultados mostraram diferença significativa na mortalidade com relação à cepa e dias pós-tratamento (P = 0.0001), mas não com relação à concentração de conídios (P = 0.634). A mortalidade média de larvas por dia para o NB3 para diferentes concentrações variou de 20 a 25 larvas por dia, enquanto para o GHA a mortalidade diária variou de 5 a 12 larvas. Na mortalidade pós-tratamento, a maior mortalidade foi registrada nas larvas de terceiro estágio para o NB3, enquanto para o GHA o maior percentual de mortalidade foi observado em indivíduos que conseguiram atingir o estado adulto. Os resultados da pesquisa atual retratam o papel notável de B. bassiana no manejo de um importante vetor de doenças humanas.

Abstract Aedes aegypti is a culicide that has gained relevance over the years due to its ability to transmit various viruses that cause diseases in humans that all the years cause high mortality rates in the world population. The main problem is that Ae. aegypti has managed to establish and maintain a close relationship with humans and their habitat, which is why the search for alternatives to control vector populations becomes imperative. The objective of the present work was to study the effects of two Beauveria bassiana strains on Aedes aegypti. Third instar larvae of Ae. aegypti in 250 mL plastic containers were inoculated with the GHA and NB3 strains at different concentrations (1.5 × 104, 1.5× 105, 1.5 × 106 and 1.5 × 107 conidia/mL). The NB3 strain presented highest mortality values with 63% in the highest concentration i.e., 1.5 × 107, while for the GHA strain the highest mortality value was 30.7% at the same concentration. The results showed significant difference in mortality with respect to the strain and days post treatment (P = 0.0001), but not with respect to the conidial concentration (P = 0.634). The average mortality of larvae per day for the NB3 for different concentrations ranged from 20 to 25 larvae per day, while for the GHA daily mortality ranged from 5 to 12 larvae. In post-treatment mortality, the highest mortality was recorded in the third stage larvae for the NB3, while for GHA the highest percentage mortality was observed in individuals who managed to reach the adult state. The findings of the current research depicted the noteworthy role of B. bassiana for the management of an important vector of human disease.

Abstract Background: Non-Hodgkin lymphomas are heterogeneous neoplasms derived from lymphohematopoietic cells, which are rarely found in children < 2 years of age and have a higher prevalence in males. Case report: One-year and eleven-month-old male patient started with pain in the lower and upper limbs, intermittent claudication, bone deformity, and generalized hypotonia, for which juvenile arthritis was suspected. He received non-steroidal anti-inflammatory drug treatment. As no improvement was reported, he was admitted in a different hospital with lymph nodes and nodulations in the scrotal and brachial region and hepatomegaly. Therefore, early activation of puberty with evidence of hypercalcemia was presumed. Radiological studies indicated possible bone dysplasia; however, positron emission tomography detected areas compatible with malignant process. Precursor B lymphoma was diagnosed. Hypercalcemia is a metabolic disorder considered a paraneoplastic syndrome in the presence of cancer, which is an exceptional clinical finding in children with acute lymphoblastic leukemia. Conclusions: Bone pain in the pediatric age deserves a thorough physical examination to favor an early diagnosis of childhood cancer and a better prognosis.

Resumen Introducción: Los linfomas no Hodgkin son neoplasias heterogéneas derivadas de las células linfohematopoyéticas. Es raro que se presenten antes de los 2 años de edad y la prevalencia es mayor en el sexo masculino. Caso clínico: Paciente de sexo masculino de 1 año y 11 meses que debutó con dolor en miembros inferiores y superiores, claudicación intermitente, deformidad ósea e hipotonía generalizada, por lo que se sospechaba artritis juvenil. Se trató con antiinflamatorios no esteroideos. Al no haber mejoría, ingresó a otro hospital con adenopatías y nodulaciones en la región escrotal y braquial, y hepatomegalia, por lo que se presumió la activación precoz de la pubertad con evidencia de hipercalcemia. Los estudios radiológicos indicaron una posible displasia ósea. Sin embargo, la tomografía por emisión de positrones detectó zonas compatibles con un proceso maligno. Se diagnosticó linfoma de precursores B. La hipercalcemia es una alteración metabólica que, en presencia de cáncer, se considera un síndrome paraneoplásico. Es un dato clínico excepcional que se puede observar en niños con leucemia linfoblástica aguda. Conclusiones: El dolor óseo en la edad pediátrica amerita una exploración física minuciosa para realizar un diagnóstico oportuno del cáncer infantil y mejorar el pronóstico del paciente.

ABSTRACT Background: Anastomotic leak (AL) is one of the most feared complication of colorectal surgery. Its development is dependent of patient and surgery factors. Of these, bowel perfusion is one of the most important. Fluorescent angiography (FA) allows the identification in real time of the bowel perfusion. Objective: to describe the experience in the use of FA during colorectal surgery in a University Hospital setting in Buenos Aires, to register the change in surgical plan according to the FA findings and record the incidence of AL. Material y methods: Between January 2016 and June 2018, 37 patients with scheduled colorectal resections and FA bowel perfusion assessment were included. Results: Perfusion assessment with FA was possible in all cases with an extra operative time of 3 to 9 minutes, a change in surgical plan was registered in 4 cases (10.81%) and 2 AL were recorded (5.41%). Conclusions: FA during colorectal surgery is feasible, with minimum extra operative time and results in a change in surgical plan in 11% of the cases, and low rate of anastomotic fistula.

RESUMEN Antecedentes: la fístula anastomótica (FA) es una de las complicaciones más severas de la cirugía colo rrectal. Su desarrollo obedece a múltiples factores dependientes del paciente y la técnica operatoria; entre estos últimos podemos mencionar la vascularización de los cabos como uno de los principales. La angiografía fluorescente (AF) permite la evaluación de ese factor en tiempo real durante la cirugía. Objetivo: describir la experiencia en el uso de la AF durante la cirugía colorrectal en un Hospital Uni versitario de la ciudad de Buenos Aires, registrar el cambio de conducta quirúrgica inducido por el uso de la AF y la incidencia de FA. Material y métodos: entre enero de 2016 y junio de 2018 se incluyeron 37 pacientes sometidos a resecciones colónicas programadas y con evaluación de la perfusión con AF. Resultados: la AF pudo realizarse en todos los pacientes con un tiempo operatorio extra de 3 a 9 mi nutos, registrando un cambio de conducta en 4 (10,81%) pacientes. Se registraron 2 (5,41%) fístulas anastomóticas. Conclusiones: la AF con verde de indocianina durante la cirugía colorrectal fue factible, sumó mínima complejidad y tiempo a la operación tradicional, y permitió cambiar la conducta en la sección intestinal en el 11% de los casos, con baja tasa de fístulas anastomóticas.

Abstract Objetives: To estimate the association between having knowledge about cervical cancer (CC) and having a Pap test (PAP) in Peruvian women over 30 years old. Materials and Methods: A secondary analysis of the Demographic and Family Health Survey of the years 2015 to 2017 was carried out. The level of knowledge was evaluated using the questions, do you think that cancer can be prevented?, Have you ever heard of CC?, Have you ever heard of human papillomavirus (HPV)? And do you think HPV can cause CC? The dependent variable was the realization of a PAP in the last two years. To estimate the association, generalized linear models of the raw and adjusted Poisson family were used. The measure of association was the adjusted prevalence ratio (aPR) with its respective 95% confidence intervals (95% CI). Results: Data from 21 563 women were analyzed. The prevalence of having performed a PAP in the last two years was 52.4%. It was found that, those who responded that cancer can be prevented (aPR = 1.09; 95% CI: 1.01-1.17), who had heard of CC (aPR = 1.27; 95% CI: 1.14-1 , 40) or HPV (aPR = 1.20; 95% CI: 1.13-1.28) or who responded that HPV could cause CC (aPR = 1.21; 95% CI: 1.11-1.33) had a higher prevalence of having performed a PAP in the last two years. Conclusions: Having knowledge about CC and HPV has been associated with having performed a PAP in the last two years.

Resumen Objetivos: Estimar la asociación entre tener conocimientos acerca del cáncer de cuello uterino (CaCu) y re alizarse una prueba de Papanicolaou (PAP) en mujeres peruanas mayores de 30 años. Materiales y métodos: Se realizó un análisis secundario de la Encuesta Demográfica y de Salud Familiar de los años 2015 al 2017. El nivel conocimiento fue evaluado utilizando las preguntas: ¿considera usted que el cáncer se puede prevenir?, ¿alguna vez ha oído hablar del CaCu?, ¿alguna vez ha oído hablar del virus del papiloma humano (VPH)? y ¿considera que el VPH puede causar CaCu? La variable dependiente fue la realización de un PAP en los dos últimos años. Para estimar la asociación se utilizaron modelos lineales generalizados de la familia Poisson crudos y ajustados. La medida de asociación fue la razón de prevalencia ajustada (RPa) con sus respectivos intervalos de confianza al 95% (IC 95%). Resultados: Se analizaron datos de 21 563 mujeres. La prevalencia de haberse realizado un PAP en los últimos dos años fue 52,4%. Se encontró que, quienes respondieron que se puede prevenir el cáncer (RPa = 1,09; IC 95%: 1,01-1,17), que habían oído hablar del CaCu (RPa = 1,27; IC 95%: 1,14-1,40) o del VPH (RPa = 1,20; IC 95%:1,13-1,28) o que respondieron que el VPH podía causar CaCu (RPa = 1,21; IC 95%: 1,11 1,33) tuvieron una mayor prevalencia de haberse realizado un PAP en los últimos dos años. Conclusiones: Tener conocimientos sobre CaCu y VPH se asoció con haberse realizado un PAP en los últimos dos años.

Abstract Objetives: To estimate the association between having knowledge about cervical cancer (CC) and having a Pap test (PAP) in Peruvian women over 30 years old. Materials and Methods: A secondary analysis of the Demographic and Family Health Survey of the years 2015 to 2017 was carried out. The level of knowledge was evaluated using the questions, do you think that cancer can be prevented?, Have you ever heard of CC?, Have you ever heard of human papillomavirus (HPV)? And do you think HPV can cause CC? The dependent variable was the realization of a PAP in the last two years. To estimate the association, generalized linear models of the raw and adjusted Poisson family were used. The measure of association was the adjusted prevalence ratio (aPR) with its respective 95% confidence intervals (95% CI). Results: Data from 21 563 women were analyzed. The prevalence of having performed a PAP in the last two years was 52.4%. It was found that, those who responded that cancer can be prevented (aPR = 1.09; 95% CI: 1.01-1.17), who had heard of CC (aPR = 1.27; 95% CI: 1.14-1 , 40) or HPV (aPR = 1.20; 95% CI: 1.13-1.28) or who responded that HPV could cause CC (aPR = 1.21; 95% CI: 1.11-1.33) had a higher prevalence of having performed a PAP in the last two years. Conclusions: Having knowledge about CC and HPV has been associated with having performed a PAP in the last two years.

Resumen Objetivos: Estimar la asociación entre tener conocimientos acerca del cáncer de cuello uterino (CaCu) y re alizarse una prueba de Papanicolaou (PAP) en mujeres peruanas mayores de 30 años. Materiales y métodos: Se realizó un análisis secundario de la Encuesta Demográfica y de Salud Familiar de los años 2015 al 2017. El nivel conocimiento fue evaluado utilizando las preguntas: ¿considera usted que el cáncer se puede prevenir?, ¿alguna vez ha oído hablar del CaCu?, ¿alguna vez ha oído hablar del virus del papiloma humano (VPH)? y ¿considera que el VPH puede causar CaCu? La variable dependiente fue la realización de un PAP en los dos últimos años. Para estimar la asociación se utilizaron modelos lineales generalizados de la familia Poisson crudos y ajustados. La medida de asociación fue la razón de prevalencia ajustada (RPa) con sus respectivos intervalos de confianza al 95% (IC 95%). Resultados: Se analizaron datos de 21 563 mujeres. La prevalencia de haberse realizado un PAP en los últimos dos años fue 52,4%. Se encontró que, quienes respondieron que se puede prevenir el cáncer (RPa = 1,09; IC 95%: 1,01-1,17), que habían oído hablar del CaCu (RPa = 1,27; IC 95%: 1,14-1,40) o del VPH (RPa = 1,20; IC 95%:1,13-1,28) o que respondieron que el VPH podía causar CaCu (RPa = 1,21; IC 95%: 1,11 1,33) tuvieron una mayor prevalencia de haberse realizado un PAP en los últimos dos años. Conclusiones: Tener conocimientos sobre CaCu y VPH se asoció con haberse realizado un PAP en los últimos dos años.

Abstract Introduction: It is still controversy about the usefulness of functional echocardiography (FnEC) in critically ill neonates. Objective: To analyze the usefulness of the FnEC in the treatment decisions in neonates admitted to a Neonatal Intensive Care Unit (NICU). Materials and methods: A year prospective study in a NICU. A trained cardiologist performed a FnEC to 72 h of life patients to evaluate the cardiac function and heart structure. We analyzed the clinical decisions after the findings. Results: 37 neonates underwent two FnEC: at the diagnosis and at follow-up. Eleven patients (29.7%) had structural and functional abnormalities, 9 (24.3%) only functional, 7 (18.9%) only structural, and in the rest, 10 (27%), were normal. Al least one change in the management occurred in 70% of the patients. The main changes were to the ventilatory support (63%), followed by inotropic support (19.5%) and fluid intake (10.8%). In all changes, we observed an improvement in the clinical conditions of the neonates. Conclusions: The FnEC allowed to determinate the cardiovascular structures and hemodynamic conditions of the patients and make a more precise therapeutic modifications.

Resumen Introducción: Aún existe controversia sobre la utilidad de la ecocardiografía funcional (EcoFn) en la valoración cardiovascular de neonatos críticamente enfermos. Objetivo: Analizar la utilidad de la EcoFn en la modificación de tratamiento en neonatos ingresados a una Unidad de Cuidados Intensivos Neonatales (UCIN). Material y métodos: Estudio prospectivo en una UCIN durante un año mediante EcoFn realizada por un cardiólogo capacitado en pacientes en sus primeras 72 horas de vida extrauterina, con valoración de la funcionalidad cardiaca y presencia de alteraciones estructurales. Con base en los hallazgos se analizaron las modificaciones al tratamiento. Resultados: 37 neonatos fueron evaluados con EcoFn en dos ocasiones: una diagnóstica y otra de seguimiento. En 11 (29.7%) se encontró daño estructural y funcional, en 9 (24.3%) solo funcional, en 7 (18.9%) solo estructural y en 10 (27%) no se observaron alteraciones. En el 70% se realizó al menos un cambio de tratamiento. Los cambios más frecuentes fueron modificaciones al apoyo ventilatorio (63%), seguido del apoyo aminérgico (19.5%) y modificaciones en el aporte de líquidos (10.8%). En todos los casos los cambios mejoraron las condiciones clínicas de los neonatos. Conclusiones: La EcoFn permitió determinar mejor las condiciones estructurales y hemodinámicas de los pacientes y realizar modificaciones terapéuticas más precisas.

Abstract We report the synthesis of AlN hexagonal thin films by pulsed laser ablation, using Al target in nitrogen ambient over natively-oxidized Si (111) at 600°C. Composition and chemical state were determined by X-ray photoelectron spectroscopy, while structural properties were investigated using X-ray diffraction. High-resolution XPS spectra present a gradual shift to higher binding energies on the Al2p peak when nitrogen pressure is incremented, indicating the formation of the AlN compound. At 30 mTorr nitrogen pressure, the Al2p peak corresponds to AlN, located at 73.1 eV, and the XRD pattern shows a hexagonal phase of AlN. The successful formation of the AlN compound is corroborated by UV-Vis reflectivity measurements.

Abstract In this work ZnO films were deposited on titanium substrates by sputtering technique for non-enzymatic glucose detection in an alkaline solution. The samples were grown using pulsed D.C. sputtering using a ZnO target; we kept constant the power at 100 W and varied the deposition time, in order to obtain films with different thickness. The properties of the samples were analyzed by X-ray diffraction (XRD), optical transmission, scanning electron microscopy (SEM), and electrochemical techniques. The results showed that the thickness of the samples varied with the deposition time. The electrochemical response studied by cyclic voltammetry revealed that the sensor response increased when the ZnO film thickness decreased. The electrochemical sensing device showed a sensitivity of 7.65 μΑ cm-2mM-1 with a linear response range of 3.3 mM to 11.0 mM.

Abstract: Background and Aims: The biological fixation of nitrogen (BFN) in legumes native to Mexico has been little studied; particularly in species of the genus Lupinus there is no information about this. Therefore, the objective of this investigation was to evaluate the BFN in three wild lupins from the state of Jalisco, Mexico (Lupinus exaltatus, L. rotundiflorus and L. mexicanus) in terms of the amount of N fixed (kg ha-1) and the N proportion derived from the atmosphere (% Ndfa). Methods: The species under study as well as barley, a non-fixing species of N used as reference, were planted in agricultural soils in Zapopan, Jalisco, in the 2015-2016 autumn-winter season. During the growth of the species under study, destructive sampling was carried out at 93, 108 and 122 days after sowing (Das). In each sample the number of nodules per plant, dry matter content (Dm) and % N were quantified. With these values, the proportion of N derived from the atmosphere (% Ndfa) and amount of N fixed (kg ha-1) were estimated using the total N difference method. Key results: At 93, 108 and 122 Das L. exaltatus fixed 87.4, 86.9 and 187 kg of N ha-1; these values were equivalent to 71.0, 70.9 and 83.8% of Ndfa, respectively. The species L. rotundiflorus and L. mexicanus only showed significant values of N fixed until 122 Das. Conclusions: Under the conditions of this study it can be concluded that L. exaltatus was the most efficient species in the fixation of atmospheric N, due to a favorable symbiosis between the roots and the soil-fixing native bacteria of atmospheric N.

Resumen: Antecedentes y Objetivos: La fijación biológica del nitrógeno (FBN) en leguminosas nativas de México ha sido poco estudiada; particularmente en especies del género Lupinus no se tiene información al respecto. En este sentido, el objetivo de esta investigación fue cuantificar la acumulación de biomasa y nitrógeno (N) en tres lupinos silvestres del estado de Jalisco, México (Lupinus exaltatus, L. rotundiflorus y L. mexicanus), así como evaluar la FBN en términos de cantidad de N fijado (kg ha-1) y proporción de N derivado de la atmósfera (% Ndda). Métodos: Las especies en estudio al igual que la cebada, una especie conocida como no fijadora de N y usada de referencia, fueron cultivadas en suelos agrícolas de Zapopan, Jalisco, en el periodo otoño-invierno de 2015-2016. Durante el crecimiento de las especies en estudio se realizaron muestreos destructivos a los 93, 108 y 122 días después de la siembra (Dds). En cada muestreo se cuantificó el número de nódulos por planta, contenido de materia seca (Ms) y % de N. Con estos valores se estimó mediante el método de la diferencia de N, la proporción de N derivado de la atmósfera (% Ndda) y cantidad de N fijado (kg ha-1). Resultados clave: A los 93, 108 y 122 Dds, L. exaltatus fijó 87.4, 86.9 y 187 kg de N ha-1, lo cual fue equivalente a 71.0, 70.9 y 83.8% de Ndda, respectivamente. Las especies L. rotundiflorus y L. mexicanus solamente mostraron valores significativos de N fijado hasta los 122 Dds. Conclusiones: Bajo las condiciones de este estudio se puede concluir que L. exaltatus se caracterizó por ser la especie más eficiente en la fijación de N atmosférico, debido a una favorable simbiosis entre las raíces y las bacterias nativas del suelo fijadoras de N atmosférico.

Abstract By means of the I-V characteristics measured at room temperature, the height of the Schottky barrier established by the conductive P t - I r tip of an Atomic Force Microscope on the aluminum doped ZnO thin films were estimated in the range of 0.58 - 0.64 eV. The ideality factors were in the range of 2.11 - 1.39, respectively. These values are in accordance with those reported by other authors that measured the height of the Pt Schottky barrier on ZnO by means of several methods. The procedure detailed in this work suggests that the scanning time for obtaining I-V Schottky characteristics is of the order of 2 ms.

Abstract: Many construction projects present uncertainty in their budgets and schedules. Also, time and cost management is inconsistent. There are methodologies and techniques that improve the management of construction projects: Techniques such as Earned Value Management (EVM), ideal for planning, monitoring and controlling the management of time and costs during the execution of projects, and methodologies such as the Building Information Modeling (BIM) recognized for improving the planning and design of construction projects. This paper proposes the integration of BIM and EVM through an OpenBIM software called COST-BIM, designed in JAVA programming language and NetBeans 8.0.1 development environment. It manages construction project time and costs in a single interface, consisting of four modules and fifteen processes. The software is validated through a real social-interest housing project (SIH), comparing the budget, schedule, EVM original indicators and EVM estimates of the project versus those generated by the tool. COST-BIM manages construction projects from its planning, during its execution and until its monitoring and control, which turns it into a useful software for construction managers that strive to increase the performance of their projects.

Resumen: Muchos proyectos de construcción presentan incertidumbre en sus presupuestos y cronogramas. Asimismo, el manejo de tiempo y costos es inconsistente. Existen metodologías y técnicas que mejoran la gestión de proyectos constructivos: Técnicas como Gestión del Valor Ganado (EVM), ideal para planear, monitorear y controlar la gestión de tiempo y costos durante la ejecución de proyectos, y metodologías como Building Information Modeling (BIM) reconocida por mejorar la planeación y diseño de proyectos de construcción. Esta investigación propone la integración de BIM y EVM mediante un software OpenBIM llamado COST-BIM, diseñado en lenguaje de programación JAVA y entorno de desarrollo NetBeans 8.0.1. Gestiona tiempo y costos de proyectos constructivos bajo una única interfaz, conformada por cuatro módulos y quince procesos. La herramienta se valida a través de un proyecto real de Vivienda de Interés Social (VIS), comparando el presupuesto, cronograma, indicadores EVM y proyecciones EVM originales del proyecto frente a los generados por el software. COST-BIM gestiona proyectos de construcción desde su planeación, durante su ejecución y hasta su seguimiento y control convirtiéndolo en un software útil para gestores de construcción que se esfuerzan por aumentar el rendimiento de sus proyectos.