STUDIES AND RESEARCH REGARDING THE UNITARY ENERGY CONSUMPTION OF A RECIRCULATING AQUACOL SYSTEM

This paper aims to highlight the consumption of electricity and caloric energy consumed by a recirculating aquaculture system for the growth of aquatic life. The energy needed to operate a recirculating aquaculture system for fish farming is divided into two categories, namely the electricity needed to operate various technological equipment, the main equipment in a recirculating aquaculture system that uses electricity being recirculation pumps, mechanical filters (some types), UV sterilization facilities and aeration systems. The second category of energy consumed is the caloric energy required for heating / cooling the water in the system and the hall

GENERAL ASPECTS REGARDING THE GROWTH FRESHWATER FISH IN CUBES, AN ALTERNATIVE FOR AQUACULTURE IN ROMANIA

Due to the increased consumption of fish, as an alternative to achieving healthy population nutrition, the development of European aquaculture also shows an increasing trend. At present, freshwater culture is about 42% of total European fish production. Valuable species, from an economic point of view, can be reared in intensive systems in cages on running waters or ponds, combined with less valuable species. There are also new species that are gradually becoming increasingly important for the fish industry in Europe. Freshwater aquaculture in Romania is based on rainbow trout and carp which are still predominant species, but there is significant demand for valuable fish species [11,12,16]. Â

Release of muscle α-actin into serum after intensive exercise

Purpose: To study the effects of high-level matches on serum alpha actin and other muscle damage markers in teams of rugby and handball players. Methods: Blood samples were drawn from 23 sportsmen: 13 rugby players and 10 handball players. One sample was drawn with the player at rest before the match and one immediately after the match. Immunoassays were used to determine troponin I, troponin T, LDH, and myoglobin concentrations. Western blot and densitometry were used to measure α-actin concentrations. Muscle injury was defined by a total CK value of > 500 IU/L (Rosalki method). Results: Mean pre- and post-match serum alpha-actin values were, respectively, 7.16 and 26.47 μg/ml in the handball group and 1.24 and 20.04 μg/ml in the rugby team. CPK, LDH and myoglobin but not troponin 1 levels also significantly differed between these time points. According to these results, large amounts of α-actin are released into peripheral blood immediately after intense physical effort. Possible cross-interference between skeletal and cardiac muscle damage can be discriminated by the combined use of α-actin and troponin I. Conclusion: The significant increase in alpha-actin after a high-level match may be a reliable marker for the early diagnosis and hence more effective treatment of muscle injury

Effect of gelatin concentration, ribose and glycerol additions on the electrospinning process and physicochemical properties of gelatin nanofibers

Rheological properties of gelatin-based solutions containing different concentrations of ribose and/or glycerol were assessed before electrospun mats were manufactured and their properties investigated. Characterization included morphology, X-ray diffraction, Fourier transform infrared, solubility, swelling, the release of Maillard reaction (MR) products and their antioxidant activity. Gelatin concentrations >= 16 % w/v favoured the formation of smooth nanofibres in the electrospinning process due to their higher viscosity than for gelatin concentrations <= 14 % w/v. The diameters of the nanofibres were between 300 and 400 nm, irrespective of the concentration of gelatin and the additives. Heat treatments (80-110 degrees C) of the samples induced MR between gelatin and ribose, which provided the mats with water stability. Nevertheless, the fibrous morphology only remained for those mats heat-treated at 110 and 100 degrees C and containing 10 and 20 wt% ribose, respectively, after sample immersion in water. Heat treatment at 110 degrees C, along with glycerol addition, resulted in a decrease of solubility (from 100 to similar to 9 %) and provided a water absorption capacity (1,500-2,500 %), due to the crosslinking of ribose and glycerol with gelatin. Release of MR antioxidant compounds from the mats into water exhibited DPPH radical scavenging activity values up to 38 % (0.61 GAE mu g/mL).The authors would like to thank the Ministry of Business, Innovation and Employment of New Zealand (MBIE, Biocide Toolbox programme) and the Basque Government (IT1658-22) for funding. A.E. thanks the State Research Agency of Spain within the Juan de la Cierva-Incorporation action (IJC2019-039697I)

STUDIES AND RESEARCH CONCERNING THE CONDITIONING OF WATER CHEMICAL PARAMETERS FROM A RECIRCULATING AQUACULTURE SYSTEM BY INTEGRATING AN INNOVATIVE WATER DENITRIFYING TECHNOLOGY

The paper aims to study the main issues regarding the productivity and efficiency of fish breeding and plant cultivation in aquaponic systems.Aquaponics is defined as a combination of aquaculture and hydroponic systems, in which waste water rich in nutrients from aquaculture system is introduced in a hydroponic system.Plants absorb nutrients from waste water thus improving and  purifying water from the aquaculture system, this method providing an ecological and sustainable system.Aquaponics integrates a hydroponic subsystem and an aquaculture subsystem, constituting the optimal practice for obtaining superior yields both quantitatively and qualitatively through the use of effluents from fish as a natural fertilizer for plants, the plants giving the fish filtered and reconditioned water. Aquaponics is a symbiosis of: aquaculture (fish breeding in closed systems) and hydroponics (growing plants in water without using soil). Vegetables, lettuce, special herbs (spinach, chives, basil and watercress) have low to medium nutrient needs and are well adapted to aquaponic systems.Plants absorb nutrients from residual water and thus improve or purify water in the aquaculture system, this method provides an ecological and sustainable system.

From seafood waste to active seafood packaging: An emerging opportunity of the circular economy

Sustainable development is an overarching objective that requires an interdisciplinary approach in order to address the societal challenge concerning climate action, environment, resource efficiency and raw materials. In this context, valorization of abundant and available bio-wastes with high potential to manufacture value-added products is the first step to close the loop between waste and consumption in line with the main goal of the circular economy. In the last years, many research works have been published in the literature regarding novel food packaging. However, most of them are focused on packaging composition (scientific aspects) and some of them on the packaging manufacture (technological aspects), but very few studies are concerned about the influence of bringing novel food packaging systems into the market on environmental, social and economic issues. In this regard, this review intends to fill this gap, considering the potential of developing food packaging from food processing waste in order to create business for food industries, being aware of the food quality demanded by consumers and the environmental care demanded by institutions and society

Studii preliminare privind cultura plantelor legumicole în ghivece şi containere

This paper presents a literature review of the vegetable growing in pots and containers. Growing vegetables in this system it is known for a long time in the countries of Western Europe and in some areas of our country. Adopting this system in Romania requires in-depth studies regarding: the suitable species, the type of pots and soil recipes needed, crop establishment and maintenance (fertilizers aplication, irrigation) and, in some cases, optimization of the certain referring to light and placement of pots and containers. This cultivation system is spread mainly in peri-urban areas were the interest among gardeners to grow their own crops and secure their vegetable needs is high and has a favorable environment. Vegetable plants cultivated in pots and containers present a large diversity worldwide but, within this diversity, the climatic conditions from our country must be appropriate for an efficient activity

Desarrollo de una herramienta basada en un soporte multimedia para el autoaprendizaje de la anatomía radiológica

La instauración del Espacio Europeo de Educación Superior nos conduce a la adopción de procesos de renovación en la metodología docente. Se deben desarrollar estrategias en las que el alumno sea protagonista de su propio aprendizaje. En nuestro ámbito enseñanza, las Ciencias de la Salud, nos enfrentamos a la necesidad de aplicar estos principios integrando conocimientos básicos y clínicos y desarrollando materiales útiles en la actividad profesional de nuestros alumnos. En este contexto, diferentes Profesores del Área de Anatomía y Embriología Humana hemos desarrollado un material docente que interesa a un conjunto de conocimientos de significada complejidad comunes a las diferentes Licenciaturas y Diplomaturas de Ciencias de la Salud. Nuestra aplicación permite el estudio individual de elementos osteológicos y la compresión de los patrones radiológicos normales. Dicho material podrá ser utilizado en procesos de enseñanza aprendizaje mediante sistemas didácticos alternativos

A Review on the Mechanical Modeling of Composite Manufacturing Processes

© 2016, The Author(s). The increased usage of fiber reinforced polymer composites in load bearing applications requires a detailed understanding of the process induced residual stresses and their effect on the shape distortions. This is utmost necessary in order to have more reliable composite manufacturing since the residual stresses alter the internal stress level of the composite part during the service life and the residual shape distortions may lead to not meeting the desired geometrical tolerances. The occurrence of residual stresses during the manufacturing process inherently contains diverse interactions between the involved physical phenomena mainly related to material flow, heat transfer and polymerization or crystallization. Development of numerical process models is required for virtual design and optimization of the composite manufacturing process which avoids the expensive trial-and-error based approaches. The process models as well as applications focusing on the prediction of residual stresses and shape distortions taking place in composite manufacturing are discussed in this study. The applications on both thermoset and thermoplastic based composites are reviewed in detail