Influencia del NO3K en la formación de cristales de CO3Ca por bacterias

In the present work, it was studied the influence of KNO3 in crystals formation of CaCO3 by 96 bacterial strains isolated from soil. This influence is null or very weak, so the KNO3 could be excluded of the culture media to investigate crystals formation, without greats consequences for it.En el presente trabajo se ,estudia ia influencia del KNO3 en la forma,ción de cristales de CaCO3 por 96 cepas de microorganismos aislados del suelo. Esta influencia es nula o muy débil, por lo que el KNO3 puede excluirse de los medios para la investigación de formación de cristales sin grandes consecuencias para la misma

Precipitación de calcita y estruvita por bacterias aisladas de las aguas del Pantano de Cubillas

There is a study being carried out on the formation of calcite and struvite crystals by 71 bacterial strains isolated from the Cubillas swamp waters. All the isolated strains are capable of precipitating carbonate calcium, the same result not occuring in the case of the struvite whose formation varies from 94,3 % to 77,5 % depending on the cultivated method being used. There has been no relation observed between the taxonomic situation of the tested strains and their capacity to form calcite and struvite crystals.Se estudia la formación de cristales de calcita y estruvita por 71 cepas bacterianas aisladas de las aguas del Pantano del Cubillas. Todas las cepas aisladas son capaces de precipitar carbonato de calcio, no ocurriendo igual en el caso de la estruvita, cuya formación varía desde un 94,3 porciento hasta un 77,5 por ciento dependiendo del medio de cultivo utilizado. No se observa ninguna relación entre la situación taxonómica de las cepas ensayadas y la capacidad de las mismas para formar cristales de calcita y estruvita

Estudio de la formación de cristales por bacterias en medios tamponados

Calcium carbonate precipitation by, 96 strains isolated from soil, was studied in B-4 buffered medium using three different systems at pH 7 and 8. CaC03 precipitation at pH 8 is observed in aH the strains investigated, whereas it occurs only exceptionally at pH 7. The tris-hydroximethyl amino methane-CIH and hydrochloride triethanol amine-NaOH were adequated for these experiments, but the 5:5 diethyl sodium barbiturate was not considered suitable.Se investiga la precipitación bacteriana de carbonato cálcico en el medio B-4 tamponado con tres sistemas bufer diferentes a los pH 7 Y 8, por 96 cepas bacterianas aisladas del suelo. A pH 8 se observa precipitación de C03Ca en todas las cepas ensayadas, mientras que el pH 7 solo ocurre excepcionalmente. Los tampones tris-hidroxmetil amino metano-HCl y clorhidrato de trietanol amina-OHNa se revelaron idóneos para estas experiencias, mientras que el tampón 5:5 dietil barbiturato sódico-HCl no resultó apropiado

Influencia el pH en la formación del cristales de carbonato cálcico por bacterias del suelo

The effect of pH on the calcium carbonate precipitation (crystal formations) was studied with 96 strains isolated from the soil. Crystal formations in culture media were detected with initial pH between 5.5 to 9. These data show that the optimum pH to crystal formations may be well stablished during bacterial growth, and that is not necessary the previous alkalinization of the culture media to calcium carbonate precipitation.Se estudia la influencia del pH en la precipitación de carbonato cálcico por 96 cepas bacterianas aisladas del suelo. Se obtienen cristales en medios con pH iniciales comprendidos entre 5,5 y 9. No es necesaria la alcalinización previa de los medios, ya que el pH óptimo para la precipitación puede alcanzarse durante el desarrollo bacteriano

Precipitación de calcita y estruvita por bacterias aisladas de las aguas del Pantano de Cubillas

Se estudia la formación de cristales de calcita y estruvita por 71 cepas bacterianas aisladas de las aguas del Pantano del Cubillas. Todas las cepas aisladas son capaces de precipitar carbonato de calcio, no ocurriendo igual en el caso de la estruvita, cuya formación varía desde un 94,3 porciento hasta un 77,5 por ciento dependiendo del medio de cultivo utilizado. No se observa ninguna relación entre la situación taxonómica de las cepas ensayadas y la capacidad de las mismas para formar cristales de calcita y estruvita.There is a study being carried out on the formation of calcite and struvite crys tals by 71 bacterial strains isolated from the Cubillas swamp waters. A1l the isolated strains are capable of precipitating carbonate calcium, the same result not occuring in the case of the struvite whose formation varies from 94,3 'lb to 77,5 ojO depending on the cultivated method being used. There has been no relation observed between the taxonomic situation of the tested strains and their capacity to form calcite and struvite crystals

Estudio de la formación de cristales por bacterias en medios tamponados

Se investiga la precipitación bacteriana de carbonato cálcico en el medio B-4 tamponado con tres sistemas bufer diferentes a los pH 7 Y 8, por 96 cepas bacterianas aisladas del suelo. A pH 8 se observa precipitación de C03Ca en todas las cepas ensayadas, mientras que el pH 7 solo ocurre excepcionalmente. Los tampones tris-hidroxmetil amino metano-HCl y clorhidrato de trietanol amina-OHNa se revelaron idóneos para estas experiencias, mientras que el tampón 5:5 dietil barbiturato sódico-HCl no resultó apropiado.Calcium carbonate precipitation by, 96 strains isolated from soil, was studied in B-4 buffered medium using three different systems at pH 7 and 8. CaC03 precipitation at pH 8 is observed in aH the strains investigated, whereas it occurs only exceptionally at pH 7. The tris-hydroximethyl amino methane-CIH and hydrochloride triethanol amine-NaOH were adequated for these experiments, but the 5:5 diethyl sodium barbiturate was not considered suitable

Factores asociados al uso de métodos anticonceptivos en mujeres en edad fértil de 15 a 49 años según encuesta demográfica en Perú

Background: Contraceptive methods are an important tool to achieve the desired family planning. Objective: To determine the factors associated within the use of contraceptive methods in women of childbearing age between 15 to 49 years old according to the ENDES 2018. Material and methods: Descriptive, observational, analytical and retrospective study. The sample, of the National Demographic Survey of Family Health (ENDES) 2018, to Peruvian women between 15 to 49 years old who responded to the contraceptive methods module was analyzed. Results: There is a higher prevalence of women using contraceptive methods in the urban area (PR = 1,046, CI: 1,037 - 1,054), according the marital status there is a high use in married women of contraceptive use (PR = 1,080 CI: 1,071 - 1,090), in the educational level it's obtained that women with higher education have a higher prevalence of contraceptive use (PR = 1,021, CI: 1,016 - 1,026) and, finally, that the age in the first sex relationship before 17 years has a higher prevalence (PR = 1,017 CI: 1,016 - 1,026). Conclusion: There is a positive association between living in an urban area, age of first sexual intercourse less than 17 years, being married and having high educational level in the use of contraceptive methods.Introducción: Los métodos anticonceptivos son importantes herramientas para lograr una planificación familiar deseada. Objetivo: Determinar los factores asociados al uso de métodos anticonceptivos en mujeres en edad fértil de 15 a 49 años según ENDES 2018. Material y métodos: Estudio descriptivo, observacional, analítico y retrospectivo. Se analizó la muestra de la Encuesta Nacional Demográfica de Salud Familiar (ENDES), del año 2018 a mujeres peruanas entre 15 a 49 años que respondieron el módulo de métodos anticonceptivos. Resultados: Mayor prevalencia de usuarias de métodos anticonceptivos en el área urbana (RP=1,046, IC:1,037 – 1,054), según estado conyugal se evidencia un mayor uso en casadas o convivientes (RP=1,080 IC:1,071 – 1,090), en el nivel educativo se obtiene que mujeres con estudios superiores tiene mayor prevalencia de uso de anticonceptivos (RP= 1,021, IC:1,016 – 1,026) y, finalmente, la edad en la 1ª relación sexual menor a los 17 años tiene mayor prevalencia (RP = 1,017 IC:1,016 – 1,026). Conclusión: Existe asociación positiva entre residir en área urbana, edad de primera relación sexual menor a 17 años, ser casada o conviviente y tener grado de instrucción superior y el uso de métodos anticonceptivos

Biology of moderately halophilic aerobic bacteria

The moderately halophilic heterotrophic aerobic bacteria form a diverse group of microorganisms. The property of halophilism is widespread within the bacterial domain. Bacterial halophiles are abundant in environments such as salt lakes, saline soils, and salted food products. Most species keep their intracellular ionic concentrations at low levels while synthesizing or accumulating organic solutes to provide osmotic equilibrium of the cytoplasm with the surrounding medium. Complex mechanisms of adjustment of the intracellular environments and the properties of the cytoplasmic membrane enable rapid adaptation to changes in the salt concentration of the environment. Approaches to the study of genetic processes have recently been developed for several moderate halophiles, opening the way toward an understanding of haloadaptation at the molecular level. The new information obtained is also expected to contribute to the development of novel biotechnological uses for these organisms

A Potassium Metal-Organic Framework based on Perylene- 3,4,9,10-tetracarboxylate as Sensing Layer for Humidity Actuators

We have synthesized a novel three-dimensional metal-organic-framework (MOF) based on the perylene-3,4,9,10-tetracarboxylate linker and potassium as metallic centre. We report the formation of this K-based MOF using conventional routes with water as solvent. This material displays intense green photoluminescence at room temperature, and displays an aggregation dependent quenching. Correlation of the optical properties with the crystalline packing was confirmed by DFT calculations. We also demonstrate its potential to build humidity actuators with a reversible and reproducible response, with a change of 5 orders of magnitudes in its impedance at about 40% relative humidity (RH). This 3D-MOF is based on an interesting perylene derivative octadentate ligand, a moiety with interesting fluorescent properties and known component in organic semiconductors. To the best of our knowledge, this is the first time to build such a printed and flexible actuator towards humidity with a reversible response, enabling precise humidity threshold monitoring.This work was supported by the Junta de Andalucía (FQM-1484, and FQM-195). Red Guipuzcoana de Ciencia, Tecnología e Innovación (OF188/2017) and University of the Basque Country (GIU14/01, EHUA16/32). BB acknowledges funding by RyC-2012–10381 contract and computational resources provided by the RES and Alhambra supercomputing facilities. This work was also supported by the German Research Foundation (DFG) and the Technical University of Munich within the Open Access Publishing Funding Programme