Mesozooplankton community structure during summer months in the bay of Cádiz.

Mesozooplankton organisms (>250 μm) were sampled at two stations (inner and outer Bay) in the Bay of Cádiz between May and July 2008. Samples were analysed by means of a semi-automated technique in order to give a preliminary view of the mesoozooplankton community structure in the Bay, based on taxonomic diversity and biomass distribution among size classes. The abundance of organisms increased from May to July in accordance with the increase in temperature and Chlorophyll a (Chla) concentrations. Abundances were higher in the outer Bay station, where Chla concentrations are greater and the water column is more stable. The community changed from being meroplankton- to holoplankton-based due to an increase of Calanoida and especially Cladocera individuals (mainly Penilia avirostris), which are known to peak acutely in the summer. The analysis of Normalised Biomass-Size spectra revealed fairly steep slopes (average -1.3) and relatively high departures from steady state (r2 = 0.8 – 0.94), expectable in a coastal system such as the Bay of Cádiz were disturbance factors are introduced from benthic and tidal processes, together with anthropogenic pressure

Meteorologically-induced mesoscale variability of the North-western Alboran Sea (southern Spain) and related biological patterns

Hydrographic mesoscale structures in the North-western Alboran Sea show a high variability induced by a number of different factors. One of the most important is the differences in atmospheric pressure over the Mediterranean basin when compared to the Gulf of Cadiz. This difference modulates the zonal wind field in the Alboran Sea and the intensity of the Atlantic inflow through the Strait of Gibraltar, also affecting the formation and extension of the Western Alboran Gyre (WAG). When westerly winds are dominant, lower atmospheric pressure in the Mediterranean enhances the inflow of Atlantic waters causing the Atlantic Jet to be located in the vicinity of the Spanish shore, creating a well-defined frontal zone in front of Estepona Cove. In this situation, the coastal upwelling is enhanced, leading to a minimum in sea surface temperature and a maximum of surface nutrient concentrations located in the coastal area. The vertical position of the chlorophyll maximum found in these circumstances appeared to be controlled by the nutrient availability. On the other hand, when easterly winds prevail, higher atmospheric pressure in the Mediterranean leads to a reduced inflow and the oceanographic and biological structures are clearly different. The Atlantic Jet moves southward flowing in a south-eastern direction, changing the structure of the currents, resulting in an enhanced cyclonic circulation extending throughout the North-western Alboran Sea basin. These physical alterations also induce changes in the distribution of biogeochemical variables. Maximum nutrient and chlorophyll concentrations are located further off the coast in the central area of the newly created cyclonic gyre. During these easterlies periods coastal upwelling stops and the distribution of phytoplankton cells seems to be mainly controlled by physical processes such as advection of coastal waters to the open sea. (C) 2007 Elsevier Ltd. All rights reserved

Types and Distribution of Bioactive Polyunsaturated Aldehydes in a Gradient from Mesotrophic to OligotrophicWaters in the Alborán Sea (Western Mediterranean)

Polyunsaturated aldehydes (PUAs) are bioactive molecules suggested as chemical defenses and infochemicals. In marine coastal habitats, diatoms reach high PUA production levels during bloom episodes. Two fractions of PUA can usually be analyzed: pPUA obtained via artificial breakage of collected phytoplankton cells and dissolved PUA already released to the environment (dPUA). In nature, resource supply arises as a main environmental controlling factor of PUA production. In this work, we monitored the vertical distribution and daily variation of pPUA associated with large-size phytoplankton and dPUA, at three sites located in the Alboran Sea from mesotrophic to oligotrophic waters. The results corroborate the presence of large-size PUA producers in oligotrophic and mesotrophic waters with a significant (58%-85%) diatom biomass. In addition to diatoms, significant correlations between pPUA production and dinoflagellate and silicoflagellate abundance were observed. 2E,4E/Z-Heptadienal was the most abundant aldehyde at the three sites with higher values (17.1 fg center dot cell(-1)) at the most oligotrophic site. 2E,4E/Z-Decadienal was the least abundant aldehyde, decreasing toward the oligotrophic site. For the first time, we describe the daily fluctuation of pPUA attributable to cellular physiological state and not exclusively to taxonomical composition. Our results demonstrate the persistence of threshold levels of dPUA deep in the water column, as well as the different chromatographic profiles of dPUA compared with pPUA. We propose different isomerization processes that alter the chemical structure of the released PUAs with unknown effects on their stability, biological function, and potential bioactivity

USO DEL MATERIAL DIDÁCTICO CONCRETO PARA EL DESARROLLO DEL PENSAMIENTO LÓGICO MATEMÁTICO EN LAS PRÁCTICAS PREPROFESIONALES DE EDUCACIÓN PRIMARIA, UNHEVAL 2016

La presente investigación tiene por objetivo determinar el grado de relación del uso del material didáctico y el pensamiento lógico matemático, a través de una investigación de tipo descriptiva y correlacional, donde los estudiantes de la Escuela Profesional de Educación Primaria, de la UNHEVAL, desarrollaron como parte de su práctica preprofesional, el uso del material didáctico concreto, para la definición del pensamiento matemático en alumnos de educación primaria. Esta investigación se llevó a cabo a través de un muestreo no probabilístico, donde se tomó como muestra el 25.6% de estudiantes. Se utilizó dos instrumentos con el fin de determinar la relación existente entre el uso del material didáctico y el pensamiento matemático; las mismas que fueron elaborados por el equipo de investigación. Para corroborar que la variable aleatoria en ambos grupos se distribuye normalmente, se utilizó la prueba de Shapiro Wilk. Donde los resultados muestran la existencia de una correlación entre el uso del Material Didáctico concreto y el Pensamiento Lógico Matemático, debido a que la manipulación de diversos materiales concretos hace que el estudiante tenga una percepción de lo que viene a ser la matemática. El material didáctico como aquellos materiales, medios y recursos que facilitan el proceso de enseñanza-aprendizaje y estimula, la función de los sentidos para acceder con más facilidad a la información y la adquisición de habilidades, destrezas, la formación de actitudes y valores. Se estableció una correlación entre el uso del material didáctico concreto y el pensamiento matemático con un resultado promedio de 16.45 para el material didáctico concreto y un 15.60 del pensamiento matemático

Drainage of the hepatic cyst by laparoscopy - clinical case

Liver cysts are formations of serous content surrounded by normal liver parenchyma, without communication with the bile duct. The cyst wall is generally lined with cuboidal epithelium surrounded by layers of connective tissue. They are rare entities in adult patients, generally, they are asymptomatic in 3%, and between 10-15% of all patients will generate symptoms that lead them to consult. A 38-year-old man with an external abdominal tomography study that reported a giant hepatic cyst. Laboratory blood tests: hemoglobin 7.9 g/dl; leukocytosis 11,000/ul; serum electrolytes, liver transaminases, and bilirubin were normal, alkaline phosphatase, and gamma glutamyl-transpeptidase 94 U/l and 241 U/l, respectively. Non-reactive anti-human immuno-deficiency virus (HIV 1) and two antibodies, venereal disease research laboratory (VDRL), cancer antigen (CA) 19-9 antigen, hepatitis B-C surface antigen, and carcinoembryonic antigen were negative. He underwent surgery by laparoscopic drainage of the liver cyst, through a median infraumbilical incision with the Hasson technique and placement of three 12 mm trocars, hepatomegaly was observed without finding an exit site for purulent material, it was punctured through liver segment V, and 2000 ml of citrine fluid was extracted. The hepatic wound is addressed with a 1-0 caliber chromic catgut thread, placing a Penrose-type drain. At 48 hours postoperatively, it evolves favorably, so it is decided to discharge. Hepatic cysts are fluid-filled cavities lined by a single-layered cuboidal or columnar biliary epithelium in the liver. A majority of hepatic cysts are found incidentally on liver imaging, such as abdominal ultrasonography, computed tomography, or magnetic resonance imaging

Polyunsaturated aldehydes from large phytoplankton of the Atlantic Ocean Surface (42ºN to 33ºS)

Polyunsaturated aldehydes (PUAs) are organic compounds mainly produced by diatoms, after cell wounding. These compounds are increasingly reported as teratogenic for species of grazers and deleterious for phytoplanktonic species, but there is still scarce information regarding concentration ranges and the composition of PUAs in the open ocean. In this study, we analyzed the spatial distribution and the type of aldehydes produced by the large-sized (>10 μm) phytoplankton in the Atlantic Ocean surface. Analyses were conducted on PUAs released after mechanical disruption of the phytoplankton cells, referred to here as potential PUAs (pPUAs). Results show the ubiquitous presence of pPUA in the open ocean, including upwelling areas, as well as oligotrophic gyres. Total pPUA concentrations ranged from zero to 4.18 pmol from cells in 1 L. Identified PUAs were heptadienal, octadienal and decadienal, with heptadienal being the most common (79% of total stations). PUA amount and composition across the Atlantic Ocean was mainly related to the nitrogen:phosphorus ratio, suggesting nutrient-driven mechanisms of PUA production. Extending the range of trophic conditions considered by adding data reported for productive coastal waters, we found a pattern of PUA variation in relation to trophic status

Mesozooplankton distribution, production and respiration in the global ocean.

Mesozooplankton biomass, abundance and mass-specific physiological rates as well as community production and respiration in the upper 2000 m were assessed from samples collected during the Malaspina circumnavigation expedition (~35ºN-40ºS) using an image-based analysis system (IBS). Equations relating metabolic rates, temperature, and body weight, were developed according to temperature ranges found at the different ocean regions and depth layers. High abundance and biomass were observed in the epipelagic zone and decreasing with depth as expected. However, high biomass was also found beyond 1000 m related to the colder and productive waters of the eastern regions of the Indian and Pacific Oceans. Specific growth and respiration rates followed a similar pattern and were highly correlated with temperature (r2=0.835 and 0.806 , respectively). Therefore, higher values were observed in the tropical and subtropical zones as the effect of higher temperature. Community production and respiration were considerably higher in the epipelagic layer, matching the distribution of biomass, with high values below 1000 m in the eastern Pacific/Indian Oceans. Global metabolism assessed through the IBS was similar to previous results based on data review.MALASPINA (CSD2008-00077

Diabetes, hiperglucemia y evolución de pacientes con la COVID-19

Introducción: La diabetes mellitus e hiperglucemia, en pacientes con la COVID-19, predisponen a mayor gravedad de la enfermedad y peores resultados a corto plazo. Objetivo: Identificar diferencias clínicas, de parámetros humorales, evolución y en el uso de medicamentos en pacientes infectados con el SARS-CoV-2, en relación con el estado glucémico, durante la pandemia de la COVID-19. Métodos: Estudio retrospectivo, de todos los pacientes infectados con SARS-CoV-2, atendidos en el Hospital Militar "Dr. Mario Muñoz Monroy", desde el 17 de marzo hasta el 4 de junio de 2020. Se recopilaron variables demográficas, evolución de los síntomas, estadía hospitalaria, antecedentes patológicos personales, parámetros humorales al ingreso, complicaciones y uso de medicamentos. Fueron creados tres grupos: diabéticos (n = 16), hiperglucémicos (glucemia en ayunas ≥ 7,8 mmol/L; n = 10) y normoglucémicos (n = 219). Se utilizaron las pruebas de ji cuadrado y H de Kruskal - Wallis, para las comparaciones entre los grupos. Se usó un intervalo de confianza del 95 %. Resultados: Los pacientes diabéticos e hiperglucémicos, en relación con normoglucémicos, tuvieron mayor proporción de sintomáticos al ingreso, hipertensión arterial, cardiopatía isquémica, insuficiencia renal crónica, otros antecedentes, complicaciones, mortalidad, uso de esteroides y Jusvinza. Además, tuvieron menores valores de hematocrito y linfocitos, mayores de neutrófilos, plaquetas, creatinina,aspartato amino transferasa,glutamil transpeptidasa, fosfatasa alcalina y deshidrogenasa láctica. Conclusiones: Tanto la diabetes como la hiperglucemia predisponen a formas clínicas más graves de COVID-19, con peores parámetros humorales, evolución y mayor mortalidad. En estos pacientes se usa con mayor frecuencia esteroides y Jusvinza

Estudio comparativo entre pacientes perfundidos con oxigenadores de membrana de fibra hueca y el oxigenador de burbujas D-700E

Different models of membrane oxygenators (MO group) and of D-700E bubble oxygenators (BO group) were comparatively studied in 24 patients with extracorporeal circulation valve surgery on the basis of several evolving variables such as: lenght of ischemic heart arrest, conciousness recovery time, intubation time, lenght of stay at surgical ICU, diuresis, postoperative bleeding, arrhythmias and postoperative complications, and surgery economic cest for each group. The study revealed a significant increase (p > 0.05) of lenght of stay at hospital in the BO group (14 ± 7 days) whereas this parameter was lower in MO group (8 ± 3 days). Arrhytmias were observed in 69 % of perfused patients with BO at the starting of reperfusion but this figure dropped to 38 % in patients treated with MO. Unit cost per BO patient was 1 124.48 and bed day cost was 1 145.24 whereas unit cost per MO patient was 642.56 and bed day cost 97.28. These results showed the economic and recovery advantages reported in the use of membrane oxygenators.Se realizó un estudio comparativo entre diferentes modelos de oxigenadores de membrana de fibra hueca (grupo OM) y el oxigenador de burbujas D-700E (grupo OB), en 24 pacientes sometidos a cirugía valvular con circulación extracorpórea, respecto a diferentes variables evolutivas, tales como: tiempo de paro isquémico, tiempo de recuperación de la conciencia, tiempo de extubación, tiempo de estadía en la unidad de cuidados intensivos quirúrgicos, diuresis, sangrado posoperatorio, arritmias y complicaciones posoperatorias; además se analizó el costo económico de la operación en cada grupo de pacientes. El estudio reportó un incremento significativo (p < 0,05) del tiempo de estadía en la sala de 14 ± 7 días en el grupo OB, el cual se redujo a 8 ± 3 días en el grupo OM. El desarrollo de arritmias al inicio de la reperfusión se observó en el 69 % de los pacientes perfundidos con OB, disminuyendo al 38 % en los casos tratados con OM. En el grupo OB el costo unitario por paciente fue de $1,124.48 y el costo días cama de$1,045.24, mientras que en el grupo OM el costo unitario por paciente fue de $642.56 y de$ 597.28 el costo días cama, reflejando con estos resultados las ventajas económicas y evolutivas que reportó utilizar los oxigenadores de membrana

Modelling the effect of the tidal cycle on the high phytoplankton biomass area of Cape Trafalgar (SW Iberian Peninsula)

Physical-biological interactions in the ocean are known to be crucial for understanding ecosystem processes. This is particularly relevant in the highly dynamic coastal regions, where the biogeochemical processes associated with higher-frequency perturbations such as tidal waves play a key role in primary production. In this study, we examine the influence of the tide-topography interaction on the high productivity area of Cape Trafalgar (NW limit of the Strait of Gibraltar, Iberian Peninsula) using a high-resolution ocean circulation model coupled to an ecosystem model. The obtained results highlight the relevance of the tidal cycle explaining the high phytoplankton biomass that characterises this region through an active and periodic forcing, resulting in a pulsating upwelling system. Our model shows that the interaction of the westward zonal component of the tidal current (uvel) with the submarine ridge (i.e., Barbate High) that characterises this region, which is perpendicular to the coast, results in the pumping of deep, cold, salty, and nutrient-rich waters to the well-illuminated subsurface waters, fuelling phytoplankton growth. At the same time, the interaction of the westward tidal current with the ridge leads to the development of a cyclonic eddy, which enables the redistribution of the upwelled waters over and to the east of Barbate High. The fortnightly tidal period has been identified as the most influential because (an effective) tidal-pumping process only takes place when the westward uvel is ∼0.42 m s−1, a condition attained between ∼3 days before and after the moment of maximum tidal flow during spring tides. Simultaneously, the energy and the associated horizontal and vertical mixing of the cyclonic gyre also vary with the tidal cycle, being stronger during spring tides. Both tidally driven processes, i.e., the cyclical upslope advection of deep nutrient-rich water and the influence of the cyclonic gyre, are the main mechanisms that lead to the development of a persistent phytoplankton-rich tongue over Barbate High. Consequently, Cape Trafalgar acts as a source of nutrient- and phytoplankton-rich waters to the surrounding waters