Characterization of Collagen from Different Discarded Fish Species of the West Coast of the Iberian Peninsula

13 páginas, 5 tablas, 3 figuras.-- This is an open Access article. Non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly attributed, cited, and is not altered, transformed, or built upon in any way, is permitted. The moral rights of the named author(s) have been asserted.Skin collagen of six discarded fish species was analyzed and compared. Acid soluble collagen (ASC) was extracted; a characteristic sodium dodecyl sulfate- polyacrylamide gel electrophoresis (SDS-PAGE) profile for type I collagen was obtained, except for Chimaera mostrosa. Contents of collagen calculated from HPro (31.85% average) were higher than those determined from ASC extracts (17.75% average), with Galeus spp. being the species with the higher percentage. Amino acid analysis revealed the typical composition of collagen, with very few differences among species. Specific profiles were obtained after protease digestion. Denaturation temperature of ASC correlated well with imino and hydroxyproline contents. Results demonstrate the feasibility of using the obtained collagens in different industrial applicationsThis work was funded by European Union FEDER POCTEP Project 0330_IBEROMARE_1_P, European Union FEDER Atlantic Area Project MARMED-2011-1/164, Xunta de Galicia Project 10TAL011E, and a contract with the “Cooperativa de Armadores del Puerto de Vigo” and FROM (Ministery of Environment, Rural and Maritime Affairs, Spain)Peer reviewe

Niveles de sedentarismo y su influencia en el padecimiento de enfermedades crónicas no transmisibles en docentes de centros educativos públicos, La Palma, Chalatenango, 2017

En los 6,062 centros educativos que existen a nivel nacional según el MINED (2016), podría asegurarse que no son cientos, sino miles de maestros/as que padecen un Enfermedad Crónica No Transmisible, comenzado por profesores y profesoras que padecen obesidad. Otro factor importante que brindara al desarrollo de esta investigación, ya que mediante los datos recabados se conocerá la cifra de docentes que padecen alguna ECNT en los 33 centros educativos de La Palma, Chalatenango. Son muchos maestros/as que se ausentan en los centros escolares por enfermedades que tienen relación con el sedentarismo. También otro grupo etario son farmacodependientes y, para sobrellevar las diferentes patologías asisten Bienestar Magisterial, para subsanar los diferentes males que les aqueja, lo que representan un gasto económico elevado para el MINED. Lo dicho anteriormente, suma otro factor importante para la ejecución de esta investigación, pues los datos recabados ayudarán a desarrollar posibles soluciones para el problema planteado. Es importante mostrar a docentes que están por jubilarse, a docentes que comienzan a trabajar en el magisterio y a las grandes autoridades del MINED lo que el sedentarismo puedo ocasionar y de cómo podemos contrarrestar esta situación. Según la Organización Mundial de la Salud (OMS) el practicar la actividad física tres veces a la semana completando 150 minutos, tiene beneficios muy significativos a nivel cardiovascular, muscular, óseo y a nivel cerebral, entre otras cosas. El que maestros y maestras pongan en práctica un estilo de vida saludable estaría mejorando su calidad de vida como por ejemplo mejorar su autoestima, lucieran un mejor físico, siendo así, un ejemplo para sus alumnos y alumnas

Effect of soluble collagen hydrolysate from Prionace glauca skin in the expression of human fibroblast collagen

1 póster presentado al 5TH Trans-Atlantic Fisheries Technology Conference (45th) WEFTA MeetingSeafood discards and by-products represent a management and environmental problem for the fishery industry. In last European CFP (UE)1380/2013 regulation, stakeholders are encouraged to find alternative uses for these discards and subproducts different from direct human consumption. One potential for these materials is obtaining high value-added products such as proteins with technological properties (collagen and gelatins), peptides with functional properties (antimicrobial activities, antioxidant, antiproliferative and anti-hypertensive) or hemo-pigments (myoglobin).The authors are grateful to the “Programa Operativo FEDER, Cooperación Transfronteriza España-Portugal” for the financial support through the projet 0687_NOVOMAR_1P.Peer reviewe

Formation of the Montalvo beach placer (Pontevedra)

In Montalvo beach (Pontevedra) a concentration of heavy minerals forming a placer takes place. The placer formation is related to the beach hydrodynamics that concentrates and segregates the different particles in layers. It is located in the north zone of the beach and achieves the biggest thickness in the upper zones of the profile (supratidal and upper intertidal zone). The location and the morphology of the placer, and the coincidence between the mineralogy of the heavy minerals and the lithology of the area suggest that the heavy minerals have a local source and are not moved offshore. The segregation in different layers is related to erosive states and to different cross-shore movements through seasonal cycle

Ocean monitoring using GNSS-R techniques and microwave radiometry: The pau instrument concept

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El uso de señales de oportunidad GPS para observación de la Tierra

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New instrument concepts for ocean sensing: analysis of the PAU-radiometer

Sea surface salinity can be remotely measured by means of L-band microwave radiometry. However, the brightness temperature also depends on the sea surface temperature and on the sea state, which is probably today one of the driving factors in the salinity retrieval error budgets of the European Space Agency's Soil Moisture and Ocean Salinity (SMOS) mission and the NASA-Comision Nacional de Actividades Espaciales Aquarius/SAC-D mission. This paper describes the Passive Advanced Unit (PAU) for ocean monitoring. PAU combines in a single instrument three different sensors: an L-band radiometer with digital beamforming (DBF) (PAU-RAD) to measure the brightness temperature of the sea at different incidence angles simultaneously, a global positioning system (GPS) reflectometer [PAU-reflectometer of Global Navigation Satellite Signals (GNSS-R)] also with DBF to measure the sea state from the delay-Doppler maps, and two infrared radiometers to provide sea surface temperature estimates. The key characteristic of this instrument is that both PAU-RAD and the PAU-GNSS/R share completely the RF/IF front-end, and analog-to-digital converters. Since in order to track the GPS-reflected signal, it is not possible to chop the antenna signal as in a Dicke radiometer, a new radiometer topology has been devised which makes uses of two receiving chains and a correlator, which has the additional advantage that both PAU-RAD and PAU-GNSS/R can be operated continuously and simultaneously to perform the sea-state corrections of the brightness temperature. This paper presents the main characteristics of the different PAU subsystems, and analyzes in detail the PAU-radiometer concept.Peer Reviewe

Calibration of Correlation Radiometers Using Pseudo-Random Noise Signals

The calibration of correlation radiometers, and particularly aperture synthesis interferometric radiometers, is a critical issue to ensure their performance. Current calibration techniques are based on the measurement of the cross-correlation of receivers’ outputs when injecting noise from a common noise source requiring a very stable distribution network. For large interferometric radiometers this centralized noise injection approach is very complex from the point of view of mass, volume and phase/amplitude equalization. Distributed noise injection techniques have been proposed as a feasible alternative, but are unable to correct for the so-called “baseline errors” associated with the particular pair of receivers forming the baseline. In this work it is proposed the use of centralized Pseudo-Random Noise (PRN) signals to calibrate correlation radiometers. PRNs are sequences of symbols with a long repetition period that have a flat spectrum over a bandwidth which is determined by the symbol rate. Since their spectrum resembles that of thermal noise, they can be used to calibrate correlation radiometers. At the same time, since these sequences are deterministic, new calibration schemes can be envisaged, such as the correlation of each receiver’s output with a baseband local replica of the PRN sequence, as well as new distribution schemes of calibration signals. This work analyzes the general requirements and performance of using PRN sequences for the calibration of microwave correlation radiometers, and particularizes the study to a potential implementation in a large aperture synthesis radiometer using an optical distribution network

Study of maize plants effects in the retrieval of soil moisture using the interefence Ppttern GNSS-R technique

The use of Global Navigation Satellite Signals Reflections (GNSS-R) techniques to retrieve geophysical parameters from surfaces has been increased in the recent years. These techniques have resulted in suitable tools to obtain information about the sea state of oceans, which is very useful to improve the ocean salinity retrieval, and also, information about the soil moisture of lands. The present work focuses on the use of the Interference Pattern Technique (IPT), a particular type of GNSS-R technique, to study vegetation-covered soils. The IPT consists mainly of the measurement of the interference pattern between the GPS direct and reflected signals (the interference power), after they impinge over the ensemble soil surface and vegetation layer. The measured interference signal provides information on the soil moisture of the surface and also, on the vegetation height.Peer ReviewedPostprint (published version