Browse

The paper highlights the complexity of multi-energy integration (electricity and heat) in a regional economic system, by using the vectors represented by green hydrogen, green certificates and methanization of captured carbon dioxide, for a local market mechanism. The scale of application can go down to residential areas of energy self-producers. Regional multi-energy systems take into account the use of fossil fuels (at least methane), along with biomass for the production of electricity alongside that from renew...

Sheep farms in the Banat Mountain area, to be economically efficient, need to use the plant resources of the pasture at optimal parameters, without degrading natural environmental factors through good consumption management practices. The new models of sustainable management of the use of plant resources for sheep feed are intended to contribute to reducing the impact of sheep exploitation on pastures on the natural environment through good practices for obtaining efficient meat and milk production from ?urcana sh...

Specialization of production according to existing resources and the availability of sheep involves the use of new production systems, their readaptation to the demand for raw materials and the availability of feed resources. Depending on the existence of resources and the typology of sheep farms in the research area, production systems can be specialized for producing lamb, young sheep, and sheep reconditioned on pastures, and producing milk-meat in pastoral systems through the seasonal use of alpine pastures or ...

Green tea is one of the most widely consumed beverages worldwide. It is consumed on its own or in various combinations. Green tea is made from the leaves of the Camellia sinensis plant which originated in Asia. Green tea drinks have many health benefits for consumers due to the compounds present in the raw material - green tea. In order to benefit from all the properties of green tea - antioxidant activity, a wide range of vitamins, provitamins and polyphenolic compounds - the raw materials used are organically gr...

Tea made from the leaves of the Camellia sinensis tea plant is one of the most widely consumed beverages in the world, thanks to its sensory qualities and its content of active ingredients beneficial to health. Black tea contains antioxidants that neutralize oxygen free radicals. In these types of foods, the activity of enzymes such as oxidoreductases, which have NAD- (Nicotinamide adenine dinucleotide) or FMN- (Flavin mononucleotide) dependent coenzymes is very important in this biodynamics. [4], [5] Heme protein...

Food supplements with strong antioxidant potential are increasingly being used by consumers to maintain good health [1], [5], [6], [8], [9], [10], [11], [15]. The best food supplements use natural and organic raw materials and -Mild Food Processing- operations. This work paper presents a management technique for food additives (used, in this case, in the testing and selection of used sweeteners) in the design of a black tea-based food supplement. The raw material used was tested by A.A.S. (Atomic Absorption Spectr...

In the period 2010-2022, Romania has seen a continuous increase in the share of renewable energy in gross final energy consumption, promoting and using green energy sources. In 2019, more than 24% of energy consumption came from renewable energy, ranking 10th in the EU, surpassing the European average, and by 2030, Romania aims to reach a share of 49.4% renewable energy in gross final consumption of electricity. In this perspective, climate change is the most discussed topic, and from the analysis of CO2 emissions...

Green tea-based food supplements are very attractive to a large group of consumers and make an important contribution to maintaining good health. In order to preserve the nutritional value of supplements of this type, pesticide and plant growth hormones-free green tea is used as raw material. Choosing the best sweeteners in this case is an important part of scientific research, especially for consumers with certain digestive conditions. The aim of this paper is to successfully identify the best way to sweeten gree...

Potential use of four types of fly ash waste as raw material for synthesis of photo- catalysts to be applied for wastewater treatment was investigated. In this respect the four selected fly ash types were subject to morphological characterization by dimensional analysis of particles and scanning electronic microscopy on to composition characterization by thermogravimetric analyses and X-ray fluorescence. Their potential to be used for advanced degradation of organic compounds via heterogeneous photocatalysis was i...

This study investigated changes in carbon (C) and nitrogen (N) concentrations in the three components of the forest ecosystem (leaves, bark and soil) along an altitudinal gradient in the temperate forests of Romania. The properties and processes within the forest ecosystem are influenced by altitude. The leaves, litter and soil are important in the good development of the ecosystem and in the cycle of the elements. Plants extract the nutrients necessary for life and growth from the soil in which they carry out the...

Residues of pesticides and HM, used in bees care or in crop fields, have negative effects on the health of bees and humans and of the antimicrobial properties of the honey. Investigation of HM and pesticides is vital, since the use of chemical solutions has -rise up- significantly. Our aim was to investigate whether the level of contaminants in honey (Fe, Zn, Pb, Cu, Cd, As, using GC/ECD and GF-AAS) and pesticides: ?-HCH, ?-HCH, ? -HCH, aldrin, dieldrin, endrin, DDE, DDD, and DDT, alpha -Endosulfan, carbofuran, pi...

The paper presents an exergy analysis of a heat pump with a steam injection. Different refrigerants as R290, R152A and R1234yf are considered. Constructive schemes such as two-stage heat pumps or cascade couplings are known and used to reduce the temperature at the compressor discharge level, but the presence of two or more compressors increases the cost of the initial investment of the equipment. This paper presents the design of a steam injection heat pump that has the advantage of a simple construction and can ...

The evaluation of radioactivity levels was performed on milk samples collected biannually for a period of 10 years (2012-2021) from two Central Romanian counties, Sibiu and Alba. The radioactivity concentrations in milk samples originated from Sibiu varied from 0.028-0.001 Bq/L to 0.347-0.017 Bq/L, from 24.017-0.977 Bq/L to 65.403-6.281 Bq/L, from 0.090-0.010 Bq/L to 0.110-0.010 Bq/L, from 0.085 to 0.110 Bq/L, for gross alpha, gross beta, 137Cs and 90Sr, respectively. The radioactivity concentrations in milk sampl...

Cryogenic energy storage (CES) is a large-scale energy storage technology that stores electricity in the form of liquefied gas at cryogenic temperatures. The CES system has three sub-processes, namely, charging or liquefaction, storage, discharging or power cycle. Because the main energy costs in this system are related to the liquefaction module, we will focus on the analysis of liquefaction processes. The present work aims at performing a comparative study between cycles commonly used for the liquefaction of air...

Meat and bone meal (MBM) is considered animal waste and can no longer be used in agriculture since the onset of the disease called spongiform encephalopathy in cattle. This waste is burned and then dumped in landfills, which causes unwanted emissions to the environment. This is a real problem nowadays and we must find environmentally friendly solutions must be identified to eliminate this waste by energy recovery. For these reasons, a lot of processes have been developed to recovery the MBM, which are environmenta...

The field of Earth Sciences has always been at the border between fundamental and applied research. If the fundamental part remains the complexity and unpredictability of research on Earth and natural phenomena, development and applied innovation are anchored in society and give a norm of the impact of research for society. The SETTING project aims to coordinate a distributed infrastructure that owns and can provide data, products and services (DPS) relevant to the field of Earth Sciences, to a wide and diverse co...

One of the most important sources of ambient air pollution in the urban area is traffic, which generates two inorganic pollutants with severe effects on human health, namely nitrogen dioxide (NO2) and ozone (O3). The lockdown imposed in the context of COVID-19 pandemic dramatically decreased the level of traffic. In this respect, the paper aims to evaluate the impact of the COVID-19 lockdown on ambient air quality, by monitoring NO2 and O3 concentrations within the INCERC Bucharest Branch, part of NIRD URBAN-INCER...

The constant need for techniques that contribute to the environmental preservation has led researchers worldwide to intensify their studies regarding different routes that enable the environmental protection. Azo - dyes can be found in aquatic matrices and conventional procedures applied in effluent treatment plants showed not so good results in respect to degrading this type of dyes that are usually persistent and refractory. Also, textile dyes release important amounts of toxic and resistant color effluents that...

Alzheimer?s disease, the most common age-related dementia worldwide, is characterized by two pathologies: deposition of ?-amyloid plaque and neurofibrillary tangles of hyperphosphorylated tau. To this date, several factors, such as oxidative stress, metal ions, or genetic factors are associated with Alzheimer`s diseases, but there are still some question marks regarding: (i) how the misfolding and aggregation of A? occurs and which is the aggregation mechanism; (ii) how the metal ions binds to A? and how they init...

In this study on speaking about minerals, we can use the elements from them in high-tech technology in everyday life. The pegmatites are surrounded by gneiss with muscovite, garnets, staurolite; mica schists with garnets, staurolite, kyanite; and amphibolites. In the Con?u area pegmatites appear in tabular veins form, or irregular lenses, arranged by accordance with mica schists of the host metamorphic rocks. The pegmatites veins have a thickness that varies between 2 and 10 meters in the central area and developm...

The paper presents well-preserved microfaunas (foraminifers and ostracods) enclosed in cuttings samples and cores recovered by 6 hydrocarbon wells drilled in the Moesian Platform, in Silistea area, S Romania. The lithological and micropaleontological obtained data improve the stratigraphic knowledge at regional level. The analyzed samples contain foraminifera that characterize biozones extending in the Sarmatian, as follows: the middle Volhynian Varidentella reussi, the late Volhynian Elphidium reginum, the early ...

Alzheimer`s diseases (AD) is the most common age-related dementia, being characterized by accumulation of extracellular amyloid plaques in AD brains. The principal constituent of these plaques are fibrils which are primarily composed of amyloid-? peptides (A?), with 39-42 amino acid residues in length, which are the proteolysis products derived from the amyloid precursor peptide (APP). Several factors, such as oxidative stress, inflammation, metal ions or genetic factors are associated with AD. Even if metal ions ...

The onshore field X is located in the Getic Basin of Romania, 100 km far from Bucharest. This 15km by 2km field was discovered by exploration department in the 1951 year. Following drilling of down-dip appraisal wells from 1951-1952, this field was established as one of the largest oil field in the Getic Basin, with more than 250 wells drilled. Based on the oil production, an Integrated Reservoir Study have been developed in 2019, in order to find new development opportunities for remaining oil in place. The wells...

Neurodegenerative diseases such as Alzheimer's and Parkinson's affect an increasing number of people. Their etiology is related to the formation of fibrils and protein aggregates. Therefore, new therapeutic strategies and compounds are required to prevent aggregation of ?-amyloid (A?) peptides. There are some neuropeptides that play an important role in the immune regulation, as well as in neuroprotection; therefore, they might be possible candidates for future drug development. Consequently, our experiments were ...

Optimum reservoir recovery and profitability results from guidance by an effective reservoir management plan. Success in developing the most appropriate reservoir management plan requires knowledge and considerations of (1) the reservoir system, including rocks, fluids, and rock-fluid interactions, as well as wellbores and associated equipment and surface facilities; (2) the technologies available to describe, analyze, and exploit the reservoir; and (3) the business environment under which the plan will be develop...

There are pesticides with a scent and specific but also there are odorous phytosanitary substances, the latter being clearly more dangerous than the first because they do not warn about their presence in the air in the given case. Why do pesticides have negative effects? Pesticides are synthetic chemicals, foreign to the animal and vegetable kingdoms. They can not be biologically assimilated, so that after dispersions, they accumulate in the organs of the human body, in the soil and in the plants. In humans, pesti...

The aim of the study was to determine the Cu and Pb content in soil profiles in relation to main responsible factors in vertical distribution: type of soil, pH and mineralogical composition. Were exanimate 34 soil profiles from the industrial area of Craiova City. For each profile was collected bulk samples at different depths (40, 100, 150, 200 and 300 cm). The analytical techniques employed for the investigation of soil and rock samples were Atomic Absorption Spectrometry (AAS) for determination of heavy metals ...

This study examined the spatial relations of the selected metals in stream sediments tributary of the Oltet River in longitudinal profile, along the entire length (185 km) in relation to geology, lithology and anthropogenic activities. Differences in regional geology from the northern to the southern of the Oltet River Basin are reflected in stream sediment geochemistry. The Olte? River crossing crystalline formations belonging to the Danubian Domain represented by metamorphic rocks (schist, gneisses, mica-schiste...

The possibility of regeneration of plants from somatic and genetic cells open the way of in vitro storage of the genotypes. The utilisation of such a method has a lot of advantages as: relatively reduced space for preservation of a large number of multiplicated clonal plants, the plants are preserved free of pathogens and viruses, in special storage conditions, the plants don?t need special treatments during preservation, the material has an adequate form for establishing nuclear stocks which make possible rapid p...

The possibility of regeneration of plants from somatic and genetic cells open the way of in vitro storage of the genotypes. The utilisation of such a method has a lot of advantages as: relatively reduced space for preservation of a large number of multiplicated clonal plants, the plants are preserved free of pathogens and viruses, in special storage conditions, the plants don?t need special treatments during preservation, the material has an adequate form for establishing nuclear stocks which make possible rapid p...

3D laser scanning digitization delivers digital copies of existing buildings in its natural form and helps architects and industry specialists keep historical monuments in a database and render their restoration very accurate and cost-effective smaller. Also, the digital copy contributes to preserving and protecting the monument, and at the same time it can be passed on to future generations in the most accurate way. Laser Scanning is a new geodetic technique through which can be measured fully automatically land ...

The purpose of the pursuit of behavior in time of the deposit of dross Santaul Mic was to obtain information in order to ensure the ability of the shipbuilding for a normal operation, the assessment of the conditions for the prevention of incidents, accidents and damage, that reduce the material damage, loss of lives and of the degradation of the environment (natural, social, cultural) and to obtain necessary information for the completion of the work in the construction industry. The study consisted in experiment...

Mining generates a negative impact on the areas after stopping mining activities. Causing mines closed because of their specific, multiple and varied adverse effects on the environment by land degradation, by vertical and horizontal surface and sliding heaps and tailings ponds; polluted surface waters and groundwater; hydrodynamic imbalance of groundwater; negative influences on the atmosphere, flora and fauna; chemical pollution of the soil. Mining gold mine Barza - Brad is currently stopped, the mine was closed....

The management of grassland areas through the correct use of these areas is reflected in the qualitative and quantitative increase in plant production per unit area, the increase of the animal product and the better protection of the environment. The national agricultural context of Romania requires the existence of a Management Plan for each area of grassland and its concession to farmers for a period of up to 10 years. This study was conducted for an area of 945 hectares of grasslands under the protection of the...

Sludge from sewage formats municipal byproducts are considered "undesirable" that focuses remove pollutants from wastewater and can be a danger to the environment.Lupeni dump was born by storing the waste material resulting from the preparation of coal.The material deposited on the two branches of the heap consists of sandstone rocks clay, marl, carbonaceous shales and sandstones.From the analysis it is observed that: the reaction is slightly alkaline soil (pH = 7.4); humus content: medium to good; containing coar...

The importance of the ecological exploitation of the treated sludge consists in the fact that it is generated in the treatment plants 365 days from 365, 24 hours from 24, but unfortunately the sludge exploitation is limited nowadays, no matter the chosen option. Practically there are no standard solutions, all the research options, respectively the exploitation of the sludge require costs and cooperation with the thirds, plus the sludge quality must conform to certain values imposed by law. The difficulty elements...

In this study, the antimicrobial activity of eight natural extracts (Citrus bergamia, Ocimum basilicum, Melissa officinalis, Eucaliptus, Pelargonium graveolens, Argania spinosa, Ricinus communis) over some nosocomial bacterial strains isolated from hospital units (Staphylococcus aureus M215, Escherichia coli M49 and Streptococcus pyogenes M372) has been studied using the diffusion method. The highest antibacterial effect was exhibited by the basil (Ocimum basilicum) and eucalyptus (Eucaliptus) oil (0.7 mm and 1.3 ...

The purpose of this study is to determine the volatile organic compounds, which are responsible for the flavor found in sour cherry distillates from various regions, in order to create a comparative study, i.e. to determine criteria used in their qualitative evaluation. In fruit distillates, a big number of volatile organic compounds has already been determined. The characteristics for differentiating the different kinds of distillates are based on the major differences of relative concentration of the compound cl...

This work aims to analyze in terms of phenolic compounds of beverages obtained from indigenous plants, plants that are known in the specialized literature as being rich in bioactive compounds. Frum (2016) developed the identification method of the phenolic compounds, and this was based on a HPLC system, produced by Agilent Technologies 1200 Series, equipped with degasser, quaternary pump, DAD detector, automatic sampler with thermostat and column compartment equipped with thermostat. The measurements that were mad...

New materials based iron powder, with several addition elements obtained by powder metallurgy. The sample were obtained by compacting of 500 M Pa , obtaining a sampless and sintering in dry hydrogen atmosphere at the different temperatures. The sintered samples were metallographic prepared by polishing in order to investigate the porosity and evaluate the microhardness of individual grain and structural constituents. I am studing the effect of addition elements on Rockwell hardness and microhardness. Hardness is t...

This work has pursued the accumulation process of aromatic compounds such as esters in three varieties of Romanian native wines from Apoldu de Jos, namely Feteasc? regal?, Feteasc? alb? and Iordana, obtained by fermenting them in a microvinification system, in a bioreactor equipped with temperature sensors for pH and CO2. The pectolytic enzymes Enozym flavors (3g/100 kg) and selected Vinartis ferm yeasts as Saccharomyces cerevisiae strain were used for the alcoholic fermentation. To identify and quantify the ester...

In most industrialized countries the problem of air pollution has become a major concern with significant social and political implications, is considered a barrier to economic and social development, drawing attention to these natural resources, materials and energy are not inexhaustible. In the literature are numerous researches on environmental pollution, correlated or not with the consequences on animals and food of animal origin, and not least on health human. In recent times the environmental pollution has d...