Аналіз текстури фрактографічних зображень на основі спектра фрактальних розмірностей Реньї

У статті досліджено застосування спектра фрактальних розмірностей Реньї для аналізу текстури фрактографічних зображень. Запропоновано використовувати цей підхід для класифікації типів зламів.В статье исследовано применение спектра фрактальных размерностей Реньи для анализа текстуры фрактографических изображений. Предложено использовать этот подход для классификации типов изломов.Investigated the use of the spectrum of fractal dimensions Renyi for texture analysis fraktohraphic images. Proposed to use this approach for the classification of types of fractures

Properties and structures of three- and four-component microemulsions

The production and characterization of polyhydroxyalkanoic acids (PHAs) from glucose in Pseudomonas aeruginosa ATCC 9027 is described. We determined that the synthesis of PHAs was not due to a complete lack of nitrogen source, as previously reported for other microorganisms. The synthesis of PHAs was observed during exponential growth and it depended on the carbon/nitrogen ratio in the culture. More significantly, the specific PHA accumulation rate in this phase was higher than that observed in the storage phase. This phenomenon was a consequence of higher extracellular production rates of gluconate and 2-ketogluconate detected during the storage phase. Therefore, the production of those acids decreased the synthesis of PHAs in P. aeruginosa. The maximum percentage of PHA accumulation obtained was 10.8% of the cell dry matter when all the glucose was consumed. The monomer composition of this PHA consisted only of saturated 3-hydroxy fatty acids (octanoic, decanoic, and dodecanoic acids) as shown by gas chromatography - mass spectroscopy and nuclear magnetic resonance analyses, where 3-hydroxydecanoic acid was the main component because of the high affinity of its PhaC synthase for this monomer. The physical properties of this PHA were determined by differential scanning calorimetry and gel permeation chromatography. " 2007 NRC.",,,,,,"10.1139/W07-023",,,"http://hdl.handle.net/20.500.12104/43907","http://www.scopus.com/inward/record.url?eid=2-s2.0-35748966451&partnerID=40&md5=0524b86dcd43cda02eaad04615a6d795",,,,,,"7",,"Canadian Journal of Microbiology",,"84

Optimización de la plataforma de desarrollo click para la auto-configuración sin estado en IPv6

Actualmente estamos experimentando una evolución continua de la Internet. Propuestas sobre nuevos protocolos y nuevas arquitecturas están siendo analizadas para solucionar algunos de los problemas presentes: adecuada calidad de servicio, movilidad, seguridad, entre otros. Por otro lado, para un mejor entendimiento de estas propuestas es necesario disponer de nuevas herramientas de prototipado rápido. Existen diversos sistemas para la implementación de redes con los protocolos y arquitecturas actuales. Uno de ellos es la plataforma Click, que permite diseñar, configurar y emular componentes internos de routers y así poder soportar los problemas actuales en la red. La plataforma Click tiene un gran soporte para desarrollar procesadores de paquetes bajo IPv4 pero desafortunadamente no es así para IPv6. Este trabajo presenta el diseño, implementación y evaluación de un elemento para la generación de un mensaje de anunciación de router para llevar a cabo el proceso de auto-configuración sin estado en IPv6 desarrollado sobre la arquitectura de software Click y poder así, contribuir al desarrollo de elementos para el soporte de IPv6

Incidence and level of Salmonella serovars in raw pork obtained from mexican butcher shops

Rhizopus homothallicus (IRD13a) was cultivated for lipase production in solid state fermentation (SSF) using sugarcane bagasse as a support and impregnated with a liquid medium. The production of an extracellular lipase from Rh. homothallicus was improved by modification of media nutrients. The nutrients that mainly influenced growth and lipase production were urea, olive oil and oligo-elements. Kinetics of growth and lipase production were carried out using the improved medium. A correlation was found between the lipase production profile and the profiles of CO2 production, O2 consumption and pH changes. A maximum of 826 U/g DM was reached in only 12 h of incubation. This production represented a 60-fold increase of lipolytic activity compared to that obtained using a well known medium for lipase production. These results are promising because this strain produces high lipase concentrations in an inexpensive and simple medium, which facilitates its recovery and purification. Lipase extraction from the fermented solid was also studied. Efficient recovery of the enzyme was achieved using Triton X-100 at 0.5% (w/v). " 2006.",,,,,,"10.1016/j.procbio.2006.05.017",,,"http://hdl.handle.net/20.500.12104/42123","http://www.scopus.com/inward/record.url?eid=2-s2.0-33749339240&partnerID=40&md5=7094169e4bc3003e238ee9fd3b9ef938",,,,,,"11",,"Process Biochemistry",,"226