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Sample records for oily samples sistema

  1. System to determine present elements in oily samples; Sistema para determinar elementos presentes en muestras oleosas

    Energy Technology Data Exchange (ETDEWEB)

    Mendoza G, Y

    2004-11-01

    In the Chemistry Department of the National Institute of Nuclear Investigations of Mexico, dedicated to analyze samples of oleaginous material and of another origin, to determine the elements of the periodic table present in the samples, through the Neutron activation analysis technique (NAA). This technique has been developed to determine majority elements in any solid, aqueous, industrial and environmental sample, which consists basically on to irradiate a sample with neutrons coming from the TRIGA Mark III reactor and to carry out the analysis to obtain those gamma spectra that it emits, for finally to process the information, the quantification of the analysis it is carried out in a manual way, which requires to carry out a great quantity of calculations. The main objective of this project is the development of a software that allows to carry out the quantitative analysis of the NAA for the multielemental determination of samples in an automatic way. To fulfill the objective of this project it has been divided in four chapters: In the first chapter it is shortly presented the history on radioactivity and basic concepts that will allow us penetrate better to this work. In the second chapter the NAA is explained which is used in the sample analysis, the description of the process to be carried out, its are mentioned the characteristics of the used devices and an example of the process is illustrated. In the third chapter it is described the development of the algorithm and the selection of the programming language. The fourth chapter it is shown the structure of the system, the general form of operation, the execution of processes and the obtention of results. Later on the launched results are presented in the development of the present project. (Author)

  2. Oily hair

    Science.gov (United States)

    Hair - oily ... are some tips for preventing and treating oily hair: Shampoo your hair every day. Leaving the shampoo on your head ... minutes before rinsing may help. Avoid brushing your hair too often or too vigorously, since the brushing ...

  3. Oily skin

    Science.gov (United States)

    ... keep your skin clean using warm water and soap, or a soapless cleanser. Clean your face with astringent pads if frequent face washing causes irritation. Use only water-based or oil-free cosmetics if you have oily skin. Your ...

  4. Total Mercury Determination in Petroleum Green Coke and Oily Sludge Samples by Cold Vapor Atomic Fluorescence Spectrometry

    National Research Council Canada - National Science Library

    Camera, Adriana S; Maranhão, Tatiane A; Oliveira, Fernando J. S; Silva, Jessee S. A; Frescura, Vera L. A

    2015-01-01

    ...+ before the atomic vapor formation. Accuracy of the method was evaluated through certified reference material, for green coke, and comparison with cold vapor atomic absorption spectrometry (CV AAS), for oily sludge...

  5. Biotreatment of oily sludges

    Energy Technology Data Exchange (ETDEWEB)

    Dirks, J. [Biogenie Inc., Calgary, AB (Canada)

    2009-07-01

    This presentation discussed a biotreatment process used at a petrochemical plant near Montreal, Quebec. The plant used a sedimentation pond that contained oily sludge with a total polycyclic hydrocarbon (TPH) content averaging 170,000 mg/kg. The aim of the remediation project was to remove the oily sludge and impacted clay at the bottom of the pond, and redesign the pond to meet current provincial regulations. Studies were conducted to evaluate bulking agents, estimate performance and determine the presence of potential inhibitors. Organic and inorganic nutrients were tested as a means of amending the sludge. An ex-situ biopile was used to treat the impacted waste. After a period of 5 months, concentrations were below the applicable criteria for Montreal urban community and provincial guidelines. A drainage system and membrane was then added to the pond. tabs., figs.

  6. sistemas

    Directory of Open Access Journals (Sweden)

    Diego Alejandro Muñoz Gaviria

    2006-01-01

    Full Text Available El texto presentado a continuación, plantea en términos generales las principales posturas conceptuales del sociólogo alemán Niklas Luhmann sobre las ideas de Max Weber y su teoría de la acción social, y de Talcott Parsons y sus planteamientos en torno a la teoría de los sistemas sociales. Al final del escrito se hace especial énfasis en el rol protagónico que para Luhmann tienen las ciencias sociales y humanas en la autorreferencia del sistema social.

  7. A new electrokinetic technology for revitalization of oily sludge

    Energy Technology Data Exchange (ETDEWEB)

    Habibi, S.

    2004-07-01

    Oily sludge is a mixture of hydrocarbons, water, metals and suspended fine solids. The petroleum industry is faced with the challenge of handling large volumes of such sludge whose properties depend on the nature of the crude oil, the processing capacity, the down-stream capacities and the design of effluent treatment plants. The management of oily sludge is both complicated and costly due to its complex composition. For that reason, this study developed a method to improve the separation of phases to allow for greater reuse of oily sludge. The study focused on the use of electrokinetic phenomena for the remediation of oily sludge. An amphoteric surfactant was used to evaluate the effect of surfactant on the electrokinetic mobilization or organic contaminants in oily sludge. A series of electrokinetic cell tests were conducted with varying electrical potentials for a 32 day period. Electrical parameters were measured on a daily basis and samples were collected at specific time intervals for UV/VIS and FTIR analysis. The study involved a range of electrokinetic processes such as electrocoagulation, electro-coalescence, desorption, electrophoresis and electro-osmosis. Study results were used to evaluate the thermodynamics of the proposed process and new theories on the behaviour of colloidal components of oily sludge were derived. The study indicated that there is an excellent separation of water, hydrocarbon and solid phases. Since the recovered solid phase has a high hydrocarbon content, it can be recycled for other processes. Some of the volatile hydrocarbons that were released during the process can also be captured and burned as a fuel. The separated water had a low concentration of hydrocarbon and could be sent to wastewater treatment plants.

  8. A cell extraction method for oily sediments

    Science.gov (United States)

    Lappé, M.; Kallmeyer, J.

    2012-04-01

    Hydrocarbons can be found in many different habitats and represent an important carbon source for microbes. As fossil fuels, they are an important economical resource and, through natural seepage or accidental release, they can be major pollutants. Oil sands from Alberta, Canada, and samples from the seafloor of the Gulf of Mexico represent typical examples of either natural or anthropogenically affected oily sediments. DNA-specific stains and molecular probes bind to hydrocarbons, causing massive background fluorescence and thereby massively hampering cell enumeration. The cell extraction procedure of Kallmeyer et al. (2008) separates the cells from the sediment matrix, producing a sediment free cell extract that can then be used for subsequent staining and cell enumeration under a fluorescence microscope. In principle, this technique can also be used to separate cells from oily sediments, but it was not originally optimized for this application and does not provide satisfactory results. Here we present a modified extraction method in which the hydrocarbons are removed prior to cell extraction by a solvent treatment. Due to the reduced background fluorescence the microscopic image becomes clearer, making cell identification and enumeration much easier. Consequently, the resulting cell counts from oily samples treated according to our new protocol were significantly higher than those treated according to Kallmeyer et al. (2008). We tested different amounts of a variety of solvents for their ability to remove hydrocarbons and found that n-hexane and - in samples containing more biodegraded oils - methanol, delivered the best results. Because solvents also tend to lyse cells, it was important to find the optimum solvent to sample ratio, at which the positive effect of hydrocarbon extraction overcomes the negative effect of cell lysis. A volumetric ratio of 1:2 to 1:5 between a formalin-fixed sediment slurry and solvent delivered highest cell counts. Extraction

  9. Pollution characteristics of polycyclic aromatic hydrocarbons (PAHs) in oily sludge from the Zhongyuan Oilfield and its peripheral soils

    Institute of Scientific and Technical Information of China (English)

    KUANG Shaoping; XU Zhong

    2009-01-01

    The purpose of this study is to determine the degree of contamination caused by polycyclic aromatic hydrocarbons (PAHs) in oily sludge and soils around it in the Zhongyuan Oilfield. The contents of polycyclic aromatic hydrocarbons in oily sludge samples were determined with HPLC. The contents of PAHs of oily sludge from three different oil production plants vary from high to low in the order of the Wenming oily sludge dumping site of No. 3 Oil Production Plant (3W)>the Mazhai oily sludge dumping site of No. 3 Oil Production Plant (3M)>the Wen'er oily sludge dumping site of No. 4 Oil Production Plant (4W). Naphthalene, acenaphthylene, acenaphthene, fluorine and phenanthrene are the major pollutants of PAHs in oily sludge. The contents of PAHs in soil samples around the oily sludge dumping sites vary widely from 434.49 to 2408.8 ng/g. Naphthalene, acenaphthene, fluorine, phenanthrene and pyrene are the characteristic factors of PAHs in soil samples of 3M and 3W, and naphthalene, acenaphthene, fluorine and phenanthrene are the characteristic factors of PAHs in soil samples of 4W. According to these data and the ratios of Fl/Py, PAHs in oily sludge samples come mainly from petrogenic sources, and soil samples are divided into petrogenic soil samples and mixed-source soil samples, and both petrogenic and pyrogenic soil samples in terms of the sources of PAHs. The classification by Nemero index P indicates that soils around the oily sludge dumping sites have been seriously polluted.

  10. Phytoremediation for Oily Desert Soils

    Science.gov (United States)

    Radwan, Samir

    This chapter deals with strategies for cleaning oily desert soils through rhizosphere technology. Bioremediation involves two major approaches; seeding with suitable microorganisms and fertilization with microbial growth enhancing materials. Raising suitable crops in oil-polluted desert soils fulfills both objectives. The rhizosphere of many legume and non-legume plants is richer in oil-utilizing micro-organisms than non-vegetated soils. Furthermore, these rhizospheres also harbour symbiotic and asymbiotic nitrogen-fixing bacteria, and are rich in simple organic compounds exuded by plant roots. Those exudates are excellent nutrients for oil-utilizing microorganisms. Since many rhizospheric bacteria have the combined activities of hydrocarbon-utilization and nitrogen fixation, phytoremediation provides a feasible and environmentally friendly biotechnology for cleaning oil-polluted soils, especially nitrogen-poor desert soils.

  11. Low-temperature co-pyrolysis behaviours and kinetics of oily sludge: effect of agricultural biomass.

    Science.gov (United States)

    Zhou, Xiehong; Jia, Hanzhong; Qu, Chengtun; Fan, Daidi; Wang, Chuanyi

    2017-02-01

    Pyrolysis is potentially an effective treatment of oily sludge for oil recovery, and its kinetics and efficiency are expected to be affected by additives. In the present study, the pyrolysis parameters, including heating rate, final pyrolysis temperature, and pyrolysis time of oily sludge in the presence of agricultural biomass, apricot shell, were systematically explored. As a result, maximum oil recovery is achieved when optimizing the pyrolysis conditionas15 K/min, 723 K, and 3 h for heating rate, final pyrolysis temperature, and pyrolysis time, respectively. Thermogravimetric experiments of oily sludge samples in the presence of various biomasses conducted with non-isothermal temperature programmes suggest that the pyrolysis process contains three stages, and the main decomposition reaction occurs in the range of 400-740 K. Taking Flynn-Wall-Ozawa analysis of the derivative thermogravimetry and thermogravimetry results, the activation energy (Ea) values for the pyrolysis of oily sludge in the presence and absence of apricot shell were derived to be 35.21 and 39.40 kJ mol(-1), respectively. The present work supports that the presence of biomass promotes the pyrolysis of oily sludge, implying its great potential as addictive in the industrial pyrolysis of oily sludge.

  12. A cell extraction method for oily sediments

    Directory of Open Access Journals (Sweden)

    Michael eLappé

    2011-11-01

    Full Text Available Hydrocarbons can be found in many different habitats and represent an important carbon source for microbes. As fossil fuels, they are also an important economical resource, through natural seepage or accidental release they can also be major pollutants. DNA-specific stains and molecular probes bind to hydrocarbons, causing massive background fluorescence and thereby hampering cell enumeration. The cell extraction procedure of Kallmeyer et al. (2008 separates the cells from the sediment matrix. In principle, this technique can also be used to separate cells from oily sediments, but it is not optimized for this application.Here we present a modified extraction method in which the hydrocarbons are removed prior to cell extraction. Due to the reduced background fluorescence the microscopic image becomes clearer, making cell identification and enumeration much easier. Consequently, the resulting cell counts from samples treated according to our new protocol are significantly higher than those treated according to Kallmeyer et al. (2008. We tested different amounts of a variety of solvents for their ability to remove hydrocarbons and found that n-hexane and – in samples containing more biodegraded oils – methanol, delivered the best results. However, as solvents also tend to lyse cells, it was important to find the optimum solvent to sample ratio, at which hydrocarbon extraction is maximised and cell lysis minimized. A ratio between slurry and solvent of 1:2 to 1:5 delivered the highest cell counts without lysing too many cells. The method provided reproducibly good results on samples from very different environments, both marine and terrestrial.

  13. QUANTITATIVE ELISA OF POLYCHLORINATED BIPHENYLS IN AN OILY SOIL MATRIX USING SUPERCRITICAL FLUID EXTRACTION

    Science.gov (United States)

    Soil samples from the GenCorp Lawrence Brownfields site were analyzed with a commercial semi-quantitative enzyme-linked immunosorbent assay (ELISA) using a methanol shake extraction. Many of the soil samples were extremely oily, with total petroleum hydrocarbon levels up to 240...

  14. Study on Supercritical Water Oxidation of Oily Wastewater with Ethanol

    Directory of Open Access Journals (Sweden)

    Ma Wenbing

    2013-06-01

    Full Text Available The conventional treatments are unable to effectively remove the Chemical Oxygen Demand (COD of oily wastewater, which has seriously threatened the environment and the normal production of oil field. In this paper, an advanced method was proposed for oily wastewater treatment, Supercritical Water Oxidation (SCWO. The co-oxidative effect of ethanol on oily wastewater is characterized for the initial COD of oily wastewater (4000 mg/L and ethanol concentration (20 mg/L for a range of temperatures (390°C-450°C, a pressure of 23 Mpa for the complete combustion of both ethanol and oily wastewater. High concentrations of ethanol caused an increase in the conversion of oily wastewater at T = 450°C, p = 23 MPa and t = 9 min, the oily wastewater removal increases 8%.

  15. Characteristics of oily sludge combustion in circulating fluidized beds.

    Science.gov (United States)

    Zhou, Lingsheng; Jiang, Xiumin; Liu, Jianguo

    2009-10-15

    Incineration of oily sludge in circulating fluidized beds may be an effective way for its management in some cases. The objective of the present paper is to investigate combustion characteristics of oily sludge, which would be helpful and useful for the design and simulation of a circulating fluidized bed. Firstly, the pyrolysis and combustion of oily sludge were studied through some thermal analyses, which included the thermogravimetric (TG) analysis and the differential thermal analytical (DTA) analysis. It was found that the combustion of oily sludge might be the combustion of its pyrolysis products. Secondly, an experiment for measuring of main components of the volatile from oily sludge pyrolysis was carried out. Some mathematic correlations about the compositions of volatile from oily sludge devolatilization were achieved from the experimental results. Finally, the combustion characteristics of oily sludge was studied in a lab-scale circulating fluidized bed, which could obtain some information about the location of release and combustion of the volatiles.

  16. Characterization of Oily and Non-Oily Natural Sediments in Palm Oil Mill Effluent

    Directory of Open Access Journals (Sweden)

    Reem A. Alrawi

    2013-01-01

    Full Text Available Palm oil is one of the many vegetable oils widely consumed around the world. The production of palm oil requires voluminous amount of water with the concurrent generation of large amount of wastewater known as palm oil mill effluent (POME. POME is a mixture of water, oil, and natural sediments (solid particles and fibres.There is a dearth of information on the physical properties of these POME sediments. This study intends to distinguish the physical properties of oily and non-oily POME sediments which include sediment size, particle size distribution (PSD, sediment shape, sediment surface morphology, and sediment density. These characterizations are important for future researches because these properties have significant effects on the settling process that occurs either under natural gravity or by coagulations. It was found that the oily and non-oily POME sediments have different sizes with nonspherical irregular shapes, and because of that, the aspect ratio (AR and circularity shape factors were adopted to describe the shapes of these sediments. The results also indicate that the density of oily POME sediment decreases as the sediment size increases.

  17. Skin permeation of lidocaine from crystal suspended oily formulations.

    Science.gov (United States)

    Matsui, Rakan; Hasegawa, Masaaki; Ishida, Masami; Ebata, Toshiya; Namiki, Noriyuki; Sugibayashi, Kenji

    2005-09-01

    In vitro permeation of lidocaine (lidocaine base, LID) through excised rat skin was investigated using several LID-suspended oily formulations. The first skin permeation of LID from an LID-suspended oily solution such as liquid paraffin (LP), isopropyl myristate (IPM), polyoxyethylene (2) oleylether (BO-2), and diethyl sebacate (DES) was evaluated and compared with that from polyethylene glycol 400 (PEG400) solution, a hydrophilic base. The obtained permeation rate of LID, Japp, from PEG400, LP, IPM, BO-2, and DES was in the order of DES>BO-2=IPM>LP>PEG400, and increased with LID solubility in the oily solvents, although LID crystals were dispersed in all solvents. Subsequently, oily formulations that consisted of different ratios of the first oily solvent (IPM, BO-2, or DES) (each 0-20%), the second oily solvent (LP) and an oily mixture of microcrystalline wax/white petrolatum/paraffin (1/5/4) were evaluated. BO-2 groups at a concentration of 5% and 10% had the highest Japp among the oily formulations, although a higher BO-2 resulted in lower skin permeation. In addition, pretreatment with BO-2 increased the skin permeation of LID. These results suggest that the penetration enhancing effect by the system may be related to the skin penetration of BO-2 itself. Finally, mathematical analysis was done to evaluate the effect of BO-2, and it was shown that BO-2 improved the LID solubility in stratum corneum lipids to efficiently enhance the LID permeation through skin.

  18. Cleansing dynamics of oily soil using nanofluids.

    Science.gov (United States)

    Wu, Stanley; Nikolov, Alex; Wasan, Darsh

    2013-04-15

    We explored the technological concept of the nanoparticle structuring in the wedge film with regards to its application to the oily soil removal phenomena. The experimental and theoretical investigations on the cleansing of canola oil from a glass substrate using commercially available nanofluids were pursued. Five commercially-available nanofluids with pHs varying from 9.3 to 9.9 were used in the experiments. Experimental results clearly indicated that the time to separate the oily soil from the glass surfaces by nanofluids was much shorter than that for the reference alkaline solution at the same pH. The positive contributions of the nanoparticles to the soil cleaning performance were rationalized in terms of the decrease in the contact angle and the interfacial tension, positive second virial coefficient, and high osmotic pressure of the nanofluid. The effective nanoparticle diameter and the effective volume (i.e., concentration) of the nanoparticles were determined using our novel capillary force balance technique in conjunction with the microinterferometric method. Using the experimentally measured values of the effective particle diameter, effective volume, and the osmotic pressure, the structural disjoining pressure in the wedge film was calculated from a theoretical model based on the statistical mechanics theory. The experimental data for the oil cleaning performance correlated well with the calculated values of the disjoining pressure, the spreading coefficient, and the film tension. We used the drop profile analysis based on the Laplace equation augmented with the extra term of the disjoining pressure to theoretically analyze the nanofluid spreading and wetting phenomena, and the detachment of the oil drop from the solid surface. These results confirm the novel mechanism of detergency using nanofluids based on the normal force (i.e., structural disjoining pressure) arising from the ordered nanoparticle structure formation in the confined space between

  19. Enhanced remediation of an oily sludge with saline water

    African Journals Online (AJOL)

    UFUOMA

    Key words: Bioremediation, biostimulation, oily sludge, saline water, Bacillus subtilis. INTRODUCTION ... bioremediation such as polycyclic aromatic hydrocarbons. (PAHs) with more than five ..... ecosystem impacted with crude oil. J. Appl. Sci.

  20. The removal of phenols from oily wastewater by chlorine dioxide

    OpenAIRE

    Hsu, Chung-Jung

    1988-01-01

    Treatability studies were performed on oily wastewaters produced by petroleum and canning industries. Chlorine dioxide was used for the removal of phenolic compounds from these oily wastewaters. Most of phenolic compounds can be destroyed by chlorine dioxide within 15 minutes if CI02-to-phenol ratios of higher than 5.0 are provided. Factors such as pH, temperature, and COD have little effect on phenol removal. The effectiveness of chlorine dioxide treatment depends critic...

  1. Water Resources Research Program. Transport of oily pollutants in the coastal waters of Lake Michigan. An application of rare earth tracers

    Energy Technology Data Exchange (ETDEWEB)

    McCown, D. L.; Saunders, K. D.; Allender, J. H.; Ditmars, J. D.; Harrison, W.

    1978-11-01

    An experimental method was developed to tag and to trace oily pollutants in fresh water environments. The use of two rare earth element tags (Dy and Sm) permitted simultaneous tracing of small oil spills at the water surface and of the underlying water. Neutron activation analysis was used to determine the tracer concentrations in numerous, small water samples collected from a moving boat. The method was applied in two field experiments with simulated oily pollutants in the Indiana Harbor Canal (IHC). Tagged oily pollutants and IHC waters were traced under both floating- and sinking-plume conditions. Floating-plume results indicated that oily waste artificially mixed downward by a ship did not resurface, no differences were seen in the movement of the oily waste and the underlying water, and mixing coefficients for tagged oil and water were similar to those measured by others on the Great Lakes. Sinking-plume results gave unequivocal evidence of the intake of IHC effluent at Chicago's South Water Filtration Plant and indicated partitioning of the oily wastes and water. Simple dilution estimates for the sinking plume were supported by the tracer data and similar estimates indicated plume center-line dilution ratios for the entire IHC effluent at the water intakes could be as low as 2.8.

  2. Characterization of oily sludge from a Tehran oil refinery.

    Science.gov (United States)

    Heidarzadeh, Nima; Gitipour, Saeid; Abdoli, Mohammad Ali

    2010-10-01

    In this study, oily sludge samples generated from a Tehran oil refinery (Pond I) were evaluated for their contamination levels and to propose an adequate remediation technique for the wastes. A simple, random, sampling method was used to collect the samples. The samples were analyzed to measure Total petroleum hydrocarbon (TPH), polyaromatic hydrocarbon (PAH) and heavy metal concentrations in the sludge. Statistical analysis showed that seven samples were adequate to assess the sludge with respect to TPH analyses. The mean concentration of TPHs in the samples was 265,600 mg kg⁻¹. A composite sample prepared from a mix of the seven samples was used to determine the sludge's additional characteristics. Composite sample analysis showed that there were no detectable amounts of PAHs in the sludge. In addition, mean concentrations of the selected heavy metals Ni, Pb, Cd and Zn were 2700, 850, 100, 6100 mg kg⁻¹, respectively. To assess the sludge contamination level, the results from the analysis above were compared with soil clean-up levels. Due to a lack of national standards for soil clean-up levels in Iran, sludge pollutant concentrations were compared with standards set in developed countries. According to these standards, the sludge was highly polluted with petroleum hydrocarbons. The results indicated that incineration, biological treatment and solidification/stabilization treatments would be the most appropriate methods for treatment of the sludges. In the case of solidification/stabilization, due to the high organic content of the sludge, it is recommended to use organophilic clays prior to treatment of the wastes.

  3. Interaction of reactive oily bubble in flotation of bastnaesite

    Institute of Scientific and Technical Information of China (English)

    周芳; 王娄翔; 徐政和; 刘青侠; 池汝安

    2014-01-01

    To understand the flotation mechanism of bastnaesite using reactive oily bubble, the interaction between bastnaesite parti-cles and reactive oily bubbles was investigated by electro-kinetic studies, induction time measurements and small-scale flotation ex-periments. The bastnaesite flotation could be seen as a hetero-coagulation between bastnaesite particles and reactive oily bubbles which was confirmed by the zeta potential distribution and induction time measurements from pH 4.8 to pH 9.0. The small-scale flo-tation tests were consistent with the hetero-coagulation results, and showed a better flotation of reactive oily bubble than air bubble among all pH range. The interaction force between bastnaesite particles and reactive oily bubbles was evaluated by the classical DLVO theory. It indicated that the attachment could be predicted well by the DLVO theory only in a restricted pH range due to the absence of hydrophilic interaction repulsion force and chemical interaction force.

  4. Monitoring of biopile composting of oily sludge.

    Science.gov (United States)

    Kriipsalu, Mait; Nammari, Diauddin

    2010-05-01

    This paper describes a bioreactor set-up used to simulate degradation of petroleum hydrocarbons in a static biopile. The large-scale test was performed in a 28 m(3) custom-designed reactor. Oily sludge (40% by weight, having 7% dry matter [DM], and hydrocarbons C(10)-C(40) 160,000 mg kg(-1) DM) was mixed with organic-rich amendments - mature oil-compost (40%) and garden waste compost (20%). Within the reactor, the temperature and soil gases were monitored continuously during 370 days via 24 measurement points. Also, moisture content was continuously recorded and airflow through compost mix occasionally measured. Three-dimensional ordinary kriging spatial models were created to describe the dynamic variations of temperature, air distribution, and hydrocarbon concentration. There were large temperature differences in horizontal and vertical sections during initial months of composting only. Water content of the mixture was uneven by layers, referring on relocation of moisture due to aeration and condensation. The air distribution through the whole reactor varied largely despite of continuous aeration, while the concentration of O(2) was never reduced less than 1-2% on average. The results showed that composting of sludge using force-aerated static biopile technology was justified during the first 3-4 months, after which the masses could be re-mixed and heaped for further maturation in low-tech compost windrows. After 370 days of treatment, the content of hydrocarbons (C( 10)-C(40)) in the compost mixture was reduced by 68.7%.

  5. Microwave pyrolysis of oily sludge with activated carbon.

    Science.gov (United States)

    Chen, Yi-Rong

    2016-12-01

    The aim of this study is to explore catalytic microwave pyrolysis of crude oil storage tank sludge for fuels using granular activated carbon (GAC) as a catalyst. The effect of GAC loading on the yield of pyrolysis products was also investigated. Heating rate of oily sludge and yield of microwave pyrolysis products such as oil and fuel gas was found to depend on the ratio of GAC to oily sludge. The optimal GAC loading was found to be 10%, while much smaller and larger feed sizes adversely influenced production. During oily sludge pyrolysis, a maximum oil yield of 77.5% was achieved. Pyrolytic oils with high concentrations of diesel oil and gasoline (about 70 wt% in the pyrolytic oil) were obtained. The leaching of heavy metals, such as Cr, As and Pb, was also suppressed in the solid residue after pyrolysis. This technique provides advantages such as harmless treatment of oily sludge and substantial reduction in the consumption of energy, time and cost.

  6. Microbial control on decomposition of radionuclides-containing oily waste in soil

    Science.gov (United States)

    Selivanovskaya, Svetlana; Galitskaya, Polina

    2014-05-01

    The oily wastes are formed annually during extraction, refinement, and transportation of the oil and may cause pollution of the environment. These wastes contain different concentrations of waste oil (40-60%), waste water (30-90%), and mineral particles (5-40%). Some oily wastes also contain naturally occurring radionuclides which were incorporated by water that was pumped up with the oil. For assessment of the hazard level of waste treated soil, not only measurements of contaminants content are needed, because bioavailability of oily components varies with hydrocarbon type, and soil properties. As far as namely microbial communities control the decomposition of organic contaminants, biological indicators have become increasingly important in hazard assessment and the efficiency of remediation process. In this study the decomposition of radionuclides-containing oily waste by soil microbial communities were estimated. Waste samples collected at the Tikchonovskii petroleum production yard (Tatarstan, Russia) were mixed with Haplic greyzem soil at ratio 1:4 and incubated for 120 days. During incubation period, the total hydrocarbon content of the soil mixed with the waste reduced from 156 ± 48 g kg-1 to 54 ± 8 g kg-1 of soil. The concentrations of 226Ra and 232Th were found to be 643 ± 127, 254 ± 56 Bq kg-1 and not changed significantly during incubation. Waste application led to a soil microbial biomass carbon decrease in comparison to control (1.9 times after 1 day and 1.3 times after 120 days of incubation). Microbial respiration increased in the first month of incubation (up to 120% and 160% of control after 1 and 30 days, correspondingly) and decreased to the end of incubation period (74% of control after 120 days). Structure of bacterial community in soil and soil/waste mixture was estimated after 120 days of incubation using SSCP method. The band number decreased in contaminated soil in comparison to untreated soil. Besides, several new dominant DNA

  7. Plasma inflammatory and vascular homeostasis biomarkers increase during human pregnancy but are not affected by oily fish intake.

    Science.gov (United States)

    García-Rodríguez, Cruz E; Olza, Josune; Aguilera, Concepción M; Mesa, María D; Miles, Elizabeth A; Noakes, Paul S; Vlachava, Maria; Kremmyda, Lefkothea-Stella; Diaper, Norma D; Godfrey, Keith M; Calder, Philip C; Gil, Angel

    2012-07-01

    The Salmon in Pregnancy Study investigated whether the increased consumption of (n-3) long-chain PUFA (LC-PUFA) from farmed Atlantic salmon affects immune function during pregnancy and atopic disease in neonates compared with a habitual diet low in oily fish. In this context, because the ingestion of (n-3) LC-PUFA may lower the concentrations of inflammatory biomarkers, we investigated whether the consumption of oily fish affects the levels of inflammatory cytokines and vascular adhesion factors during pregnancy. Pregnant women (n = 123) were randomly assigned to continue their habitual diet (control group, n = 61), which was low in oily fish, or to consume two 150-g salmon portions/wk (salmon group, n = 62; providing 3.45 g EPA plus DHA) from 20 wk of gestation until delivery. Plasma inflammatory cytokines and vascular adhesion factors were measured in maternal plasma samples. Inflammatory biomarkers, including IL-8, hepatocyte growth factor, and monocyte chemotactic protein, increased over the course of pregnancy (P pregnancy progressed (P pregnancy, they are not affected by the increased intake of farmed salmon.

  8. Sistema experimental para el monitoreo de instalaciones de potencia haciendo uso de la Web; Experimental System for Power Installations Samples by Using the Web

    Directory of Open Access Journals (Sweden)

    Yoel R Rosales Hernández

    2011-02-01

    Full Text Available El artículo que se presenta describe una alternativa económica de sistema de adquisición de datos parael monitoreo de una instalación de potencia eléctrica trifásica. El sistema experimental está basado en unmicrocontrolador de Intel StrongARM SA-1110 de 32 bits con CPU RISC, una memoria flash de 16 Mbyte,una memoria SDRAM de 32 Mbyte y un controlador LAN Ethernet de 10/100 Mbps entre otros elementos.El mismo tiene instalado un sistema operativo Linux (kernel versión 2.4 y un servidor web thttpd. Através de un programa CGI se logra el muestreo, procesamiento y transmisión de la información recibidadesde un sistema trifásico de potencia y a partir de un protocolo HTTP se envía toda esta información aun grupo de clientes conectados a una red convencional de computadoras.  This work focuses on an economic alternative for developing a data acquisition system which monitors athree-phase power intalation. This experimental system is made up of an Intel StrongARM SA-1110 32-bitRISC microcontroller, a 16-Mbyte flash memory chip, a 32-MByte SDRAM chip, a 10/100 Mbps EthernetLAN controller with 10BASE-T, as well as other  hardware elements. The system has an embedded Linuxoperating system (kernel version 2.4, and a thttpd embedded web server. A CGI program was designed inorder to enable the sampling, processing and transmition of information received from the three-phasepower installation. To achieve this, a HTTP protocol was used in order to send all this information to agroup of clients connected to a conventional PC network.

  9. Optimal conditions for bioremediation of oily seawater.

    Science.gov (United States)

    Zahed, Mohammad Ali; Aziz, Hamidi Abdul; Isa, Mohamed Hasnain; Mohajeri, Leila; Mohajeri, Soraya

    2010-12-01

    To determine the influence of nutrients on the rate of biodegradation, a five-level, three-factor central composite design (CCD) was employed for bioremediation of seawater artificially contaminated with crude oil. Removal of total petroleum hydrocarbons (TPH) was the dependent variable. Samples were extracted and analyzed according to US-EPA protocols. A significant (R(2)=0.9645, P<0.0001) quadratic polynomial mathematical model was generated. Removal from samples not subjected to optimization and removal by natural attenuation were 53.3% and 22.6%, respectively. Numerical optimization was carried out based on desirability functions for maximum TPH removal. For an initial crude oil concentration of 1g/L supplemented with 190.21 mg/L nitrogen and 12.71 mg/L phosphorus, the Design-Expert software predicted 60.9% hydrocarbon removal; 58.6% removal was observed in a 28-day experiment.

  10. WESTERN RESEARCH INSTITUTE CONTAINED RECOVERY OF OILY WASTES (CROW) PROCESS - ITER

    Science.gov (United States)

    This report summarizes the findings of an evaluation of the Contained Recovery of Oily Wastes (CROW) technology developed by the Western Research Institute. The process involves the injection of heated water into the subsurface to mobilize oily wastes, which are removed from the ...

  11. Detection of plastic and oily contamination in seed cotton at the gin using infra-red

    Science.gov (United States)

    Plastic and oily foreign material in bales of cotton lint poses problems to spinning and textile mills in the form of decreased productivity and products with inferior quality. Detecting and removing this plastic and oily foreign material at the gin is a long term goal of the cotton industry. In t...

  12. WESTERN RESEARCH INSTITUTE CONTAINED RECOVERY OF OILY WASTES (CROW) PROCESS - ITER

    Science.gov (United States)

    This report summarizes the findings of an evaluation of the Contained Recovery of Oily Wastes (CROW) technology developed by the Western Research Institute. The process involves the injection of heated water into the subsurface to mobilize oily wastes, which are removed from the ...

  13. Organics removal in oily bilgewater by electrocoagulation process.

    Science.gov (United States)

    Asselin, Mélanie; Drogui, Patrick; Brar, Satinder Kaur; Benmoussa, Hamel; Blais, Jean-François

    2008-03-01

    This study investigated the treatment of oily bilgewater using an electrocoagulation technique. Electrocoagulation process was evaluated at laboratory scale (1.7 l electrolytic cell) and involved utilization of two kinds of electrodes (iron and aluminium) arranged either in bipolar (BP) or monopolar (MP) configuration. Results showed that the best performance was obtained using mild steel MP electrode system operated at a current intensity of 1.5A, through 60 or 90 min of treatment. Under these conditions, removal yields of 93.0+/-3.3% and 95.6+/-0.2% were measured for BOD and O&G, respectively, whereas CODs and CODt were removed by 61.3+/-3.6% and 78.1+/-0.1%, respectively. Likewise, 99.4+/-0.1% of n-C10 to n-C50 hydrocarbons was removed from oily bilgewater. Electrocoagulation was also efficient for clarification of OBW. Removal yields of 99.8+/-0.4% and 98.4+/-0.5% have been measured for TSS and turbidity, respectively. Electrocoagulation process operated under the optimal conditions involves a total cost of 0.46 US$ per cubic meter of treated OBW. This cost only includes energy and electrode consumptions, chemicals, and sludge disposal.

  14. Heavy-metal removal from petroleum oily sludge using lemon- scented geraniums[General Conference

    Energy Technology Data Exchange (ETDEWEB)

    Badawieh, A.; Elektorowicz, M. [Concordia Univ., Montreal, PQ (Canada). Dept. of Building, Civil and Environmental Engineering

    2006-07-01

    Finding an acceptable method to manage oily sludge generated during petroleum processes is one of the challenges currently facing the petroleum industry. This study investigated the response of plants to heavy-metal removal from oily sludge to determine the feasibility of using phytoremediation technologies as a treatment method for oily sludge. In particular, scented geraniums (Pelargonium sp. Frensham) have shown a strong capability to survive harsh conditions such as poor soil, high/low temperatures, high heavy-metal concentrations and low water content. In response to this observation, this feasibility study placed scented geraniums in a series of pots containing oily sludge where heavy-metal concentrations were artificially increased up to 2000 ppm. Plants were grown in two systems over a period of 50 days. The first system included oily sludge and soil while the second system included oily sludge, soil and compost. The study revealed that the scented geraniums accumulated up to 1600 mg, 1000 mg, and 1200 mg, of cadmium, nickel and vanadium respectively per 1 kg of the plant's dry weight. The results suggest that phytoremediation technology may be a potential method for successfully treating or pretreating oily sludge in the field.

  15. Sources, Dangers and Treatments of Oily Soil Pollutants in Iraq

    Directory of Open Access Journals (Sweden)

    Ghazi M. Mutter

    2014-10-01

    Full Text Available Oil pollution presents significant risks to living organism and human health because it can alter the ecosystem in rivers, seas, oceans, and pollutes air and soil. Oil, for example, can even reduce the efficiency of drinking water plants. Iraq suffers a lot from oil pollution as a result of wars that not only damage the oil infrastructures but also cause loss of thousand hectare of agriculture lands. In addition, oil pollution become primary factor that contribute to the electricity, fuel shortage and traffic jam problems. Oil pollution can be easily found in many parts of Iraq, even in main streets, houses and gardens due to the residents mismanagement and misuse of oily products. Therefore, the aim of this paper is to focus in detail about the sources and dangers of oil pollution on the environment and soil, as well as to provide some suggestions and measurements that can help in limiting the impact of oil pollution in Iraq.

  16. Encapsulation of docetaxel in oily core polyester nanocapsules intended for breast cancer therapy

    Science.gov (United States)

    Youm, Ibrahima; Yang, Xiao Yan; Murowchick, James B.; Youan, Bi-Botti C.

    2011-12-01

    This study is designed to test the hypothesis that docetaxel [Doc] containing oily core nanocapsules [NCs] could be successfully prepared with a high percentage encapsulation efficiency [EE%] and high drug loading. The oily core NCs were generated according to the emulsion solvent diffusion method using neutral Labrafac CC and poly( d, l-lactide) [PLA] as oily core and shell, respectively. The engineered NCs were characterized for particle mean diameter, zeta potential, EE%, drug release kinetics, morphology, crystallinity, and cytotoxicity on the SUM 225 breast cancer cell line by dynamic light scattering, high performance liquid chromatography, electron microscopies, powder X-ray diffraction, and lactate dehydrogenase bioassay. Typically, the formation of Doc-loaded, oily core, polyester-based NCs was evidenced by spherical nanometric particles (115 to 582 nm) with a low polydispersity index ( 0.93), indicating that drug release occurred mainly by controlled diffusion. At the highest drug concentration (5 μM), the Doc-loaded oily core NCs (as a reservoir nanosystem) enhanced the native drug cytotoxicity. These data suggest that the oily core NCs are promising templates for controlled delivery of poorly water soluble chemotherapeutic agents, such as Doc.

  17. Studies on affecting factors and mechanism of oily wastewater by wet hydrogen peroxide oxidation

    Directory of Open Access Journals (Sweden)

    Zhang Wenhu

    2017-05-01

    Full Text Available Wet hydrogen peroxide oxidation of oily wastewater is performed in a batch reactor at reaction temperature between 280 °C and 320 °C, the reaction time between 30 and 90 min. Effect of reaction parameters such as reaction time, reaction temperature, H2O2 excess (HE and initial concentration of oily wastewater is investigated. The results of orthogonal test indicate that reaction temperature is the main factor and the reaction time is the secondary factor. When the reaction temperature is 300 °C, initial concentration of oily wastewater is 1160 mg/L, the reaction time is 30 min, HE is 0.75 and the COD removal of oily wastewater could reach 70%. It will not produce pollutants and it complies with the cleaner production. The preliminary study of mechanism on oily wastewater by WPO is carried out. The result indicates that oily wastewater by WPO can be explained by free radical mechanism.

  18. Studying the Kinetics of n-Butyl-Cyanoacrylate Tissue Adhesive and Its Oily Mixtures

    Science.gov (United States)

    Nedvedova, Marie; Kresalek, Vojtech; Vaskova, Hana; Provaznik, Ivo

    2016-10-01

    This study deals with the measurement of the kinetics of tissue adhesives used for supporting the hemostasis and wound closure during surgical intervention. There are available several types of adhesives of different composition which is closely related with their application. When selecting an appropriate adhesive, the time of curing could play an important role because some applications may require very fast polymerization for prompt vessel or wound closure; conversely, some situations need slower solidification because of longer manipulation with the glue during surgery. The terahertz time-domain spectroscopy is used for studying the kinetics of the n-butyl-cyanoacrylate glue in this study. An oily substance is added to the glue samples to slow the reaction rate. The technique of attenuated total reflection is used in this application; the defined amount of glue sample or its mixture is applied on the silicon crystal and the terahertz response is measured in time. This time dependences are analyzed to find time constants for mathematical description of the glue kinetics. Further, the investigated samples were analyzed using light microscopy and Raman spectroscopy for description of the structures and compositions.

  19. Sistemas audiovisuales

    OpenAIRE

    Tarrés Ruiz, Francisco

    2000-01-01

    Conté: 1. Televisión analógica y digital El libro presenta una descripción detallada de los diferentes sistemas de televisión analógica y digital e incluye un análisis exhaustivo de numerosos aspectos tecnológicos e históricos, siempre desde una perspectiva sistemática y generalista dirigida tanto a estudiantes universitarios como a técnicos de grado superior. Tras una introducción a los sistemas de comunicación visual, en la que se analizan las distintas etapas de la conversión de una...

  20. Bender Gestalt Visual-Motor test – Sistema de Pontuação Gradual (B-SPG: A study with different samples

    Directory of Open Access Journals (Sweden)

    Ana Paula Porto Noronha

    2013-05-01

    Full Text Available The aim in this study was to analyze differences between children’s performances on the Bender – Sistema de Pontuação Gradual (B-SPG [Gradual Scoring System] in the states of Minas Gerais and Paraíba, and to compare them with the results presented in the test manual. The participants were 511 children, both sexes, aged 6-10 years ( M = 8.21, SD = 1.33, and 50.7% male. The children were from two states, Minas Gerais ( n = 298, 58.3% and Paraiba ( n = 213, 41.7%. The SPG was administered collectively in classrooms. The mean B-SPG scores between the children from Minas Gerais and Paraiba were very similar and not statistically significant. Regarding the comparison between the two states and the normative sample, three results were significant, two of which favored the children from São Paulo and the other the children from Minas Gerais and Paraíba, showing little variation in the results of the B-SPG.

  1. SELECTION OF CHEMICAL TREATMENT PROGRAM FOR OILY WASTEWATER

    Directory of Open Access Journals (Sweden)

    Miguel Díaz

    2017-04-01

    Full Text Available When selecting a chemical treatment program for wastewater to achieve an effective flocculation and coagulation is crucial to understand how individual colloids interact. The coagulation process requires a rapid mixing while flocculation process needs a slow mixing. The behavior of colloids in water is strongly influenced by the electrokinetic charge, where each colloidal particle carries its own charge, which in its nature is usually negative. Polymers, which are long chains of high molecular weight and high charge, when added to water begin to form longer chains, allowing removing numerous particles of suspended matter. A study of physico-chemical treatment by addition of coagulant and flocculant was carried out in order to determine a chemical program for oily wastewater coming from the gravity separation process in a crude oil refinery. The tests were carried out in a Jar Test equipment, where commercial products: aluminum polychloride (PAC, aluminum sulfate and Sintec D50 were evaluated with five different flocculants. The selected chemical program was evaluated with fluids at three temperatures to know its sensitivity to this parameter and the mixing energy in the coagulation and flocculation. The chemical program and operational characteristics for physico-chemical treatment with PAC were determined, obtaining a removal of more than 93% for suspended matter and 96% for total hydrocarbons for the selected coagulant / flocculant combination.

  2. Sistema Solar

    OpenAIRE

    Federación de Asociaciones de Astronomía Cielo de Comellas

    2004-01-01

    Lección sobre el Sistema Solar. Curso de Astronomía Básica, segunda edición, impartido por los miembros de la Federación de Asociaciones de Astronomía Cielo de Comellas. Casa de la Ciencia, sábados, del 24 de septiembre al 22 de octubre de 2011

  3. Oily water treatment using a new steady-state fiber-bed coalescer.

    Science.gov (United States)

    Sećerov Sokolović, Radmila; Sokolović, Slobodan; Sević, Snezana

    2009-02-15

    This study was concerned with the possibility of oil separation from two heavily polluted wastewater types: formation water and wastewater from hardening shop, using bed a newly developed coalescer. Experiments were carried out using original wastewaters and an artificial model wastewater. Results obtained for seven samples of formation water of very different quality showed that the water properties had no significant effect on bed coalescence efficiency. In contrast to this, crude oil properties strongly influenced steady-state bed coalescence. In the treatment of hardening oily wastewater in situ during a 4-month period oil concentration in the effluent was less than 20mg/l in all experiments. It appeared that oil concentration and water quality had no effect on bed separation efficiency. Special design of the coalescer and use of two filter materials ensured its good performance. Namely, the pipe-in-pipe construction provided the water orientation change several times while passing through the unit, making inertia one of dominant separation mechanisms.

  4. Ashes from oily sewage sludge combustion: chemistry, mineralogy and leaching properties

    Directory of Open Access Journals (Sweden)

    Róbert Polc

    2016-07-01

    Full Text Available In the current paper the chemical and mineralogical properties of bottom ash and fly ash from oily sewage sludge combustion are investigated. The mineralogical composition and the morphology of ashes were determined by X-ray powder diffraction (XRD in combination with scanning electron microscopy with quantitative energy-dispersive X-ray microanalysis (SEM-EDX. In addition, a leaching test results are presented to shed light on the potential toxicity of studied materials and their impact on the environment is discussed. Both of the studied materials are final products of thermal oxidation at industrial sludge incinerator. This facility aims to sanitary disposal of mechanical and biological sludge from industrial wastewater treatment plant. Bottom ash and fly ash are relatively stable solid products with slightly different chemical and mineralogical composition that reflects their different origin – burning condition in furnace vs. flues gas cleaning technology. Leaching tests of both mentioned materials were implemented under laboratory conditions. The aim of the laboratory tests was to determine the possibility of the pollutants release into the environment. The data presented herein support the importance of detailed mineralogical and geochemical study for the better understanding of the leaching tests. The obtained results showed that both of the sewage sludge ash samples exceed the criteria for accepting waste in landfilles established for Slovakia.

  5. Patient experiences with oily skin: The qualitative development of content for two new patient reported outcome questionnaires

    Directory of Open Access Journals (Sweden)

    Draelos Zoe

    2008-10-01

    Full Text Available Abstract Objective To develop the content for two new patient reported outcome (PRO measures to: a assess the severity of symptoms; and b the impact of facial skin oiliness on emotional wellbeing using qualitative data from face to face, and internet focus groups in Germany and the US. Methods Using input from initial treatment satisfaction focus groups (n = 42, a review of relevant literature and expert clinicians (n = 3, a discussion guide was developed to guide qualitative inquiry using Internet focus groups (IFGs. IFGs were conducted with German (n = 26 and US (n = 28 sufferers of oily skin. Questionnaire items were generated using coded transcript data from the focus groups. Cognitive debriefing was conducted online with 42 participants and face to face with an additional five participants to assess the comprehension of the items. Results There were equal numbers of male and female participants; mean age was 35.4 (SD 9.3 years. On average, participants had had oily skin for 15.2 years, and 74% (n = 40 reported having mild-moderate acne. Participants reported using visual, tactile and sensory (feel without touching their face methods to evaluate the severity of facial oiliness. Oily facial skin had both an emotional and social impact, and was associated with feelings of unattractiveness, self-consciousness, embarrassment, irritation and frustration. Items were generated for a measure of oily skin severity (Oily Skin Self-Assessment Scale and a measure of the impact of oily skin on emotional well-being (Oily Skin Impact Scale. Cognitive debriefing resulted in minor changes to the draft items and confirmed their face and content validity. Conclusion The research provides insight into the experience of having oily skin and illustrates significant difficulties associated with the condition. Item content was developed for early versions of two PRO measures of the symptoms and emotional impact of oily facial skin. The psychometric validation of

  6. Treatment of the oily produced water (OPW using coagulant mixtures

    Directory of Open Access Journals (Sweden)

    R. Hosny

    2016-09-01

    Full Text Available Treatment of the oily produced water (OPW before injection into oil reservoirs is necessary to reduce formation damage. This can be done using chemo-physical process to minimize the oil droplets in water. In this respect, this work aims to extract natural polymer (chitosan from shrimp shells and mix it with coagulants (chitosan/carboxy methyl cellulose and chitosan/aluminum sulfate to adsorb oil from OPW. Adsorption experiments were carried out in batch mode firstly to choose the best coagulants in water treatment, also to investigate the effects of pH on the adsorption uptake, adsorbent dosage, coagulant mixture doses and contact time. It was found that the oil removal by chitosan reached 96.35% and 59% at pH = 4 and pH = 9, respectively. The ability of chitosan to remove oil was increased after adding different coagulants CMC/or aluminum sulfate at average mixing time between 30 and 60 min. It was also found that the highest removal efficiency of chitosan/CMC is 99% at (90% chitosan: 10% CMC and chitosan/Al2(SO43 is 85% at (80% chitosan: 20% Al2(SO43. The SEM photographs of chitosan, chitosan/CMC and chitosan/Al2(SO43 mixture as oil removal showed that chitosan/Al2(SO43 lies between chitosan alone and chitosan/CMC mixture. Generally chitosan/CMC characterized significantly by its high ability to adsorb petroleum oil and suspended solids from OPW, additionally, reduces the economic cost of water treatment.

  7. New technology for recycling materials from oily cold rolling mill sludge

    Institute of Scientific and Technical Information of China (English)

    Bo Liu; Shen-gen Zhang; Jian-jun Tian; De-an Pan; Ling Meng; Yang Liu

    2013-01-01

    Oily cold rolling mill (CRM) sludge is one of metallurgical industry solid wastes. The recycle of these wastes can not only protect the environment but also permit their reutilization. In this research, a new process of“hydrometallurgical treatment+hydrothermal synthesis”was investigated for the combined recovery of iron and organic materials from oily CRM sludge. Hydrometallurgical treatment, mainly including acid leaching, centrifugal separation, neutralization reaction, oxidizing, and preparation of hydrothermal reaction precursor, was first utilized for processing the sludge. Then, micaceous iron oxide (MIO) pigment powders were prepared through hydrothermal reaction of the obtained precursor in alkaline media. The separated organic materials can be used for fuel or chemical feedstock. The quality of the prepared MIO pigments is in accordance with the standards of MIO pigments for paints (ISO 10601-2007). This clean, eff ective, and economical technology off ers a new way to recycle oily CRM sludge.

  8. Optimizing Oily Wastewater Treatment Via Wet Peroxide Oxidation Using Response Surface Methodology

    Energy Technology Data Exchange (ETDEWEB)

    Shi, Jianzhong; Wang, Xiuqing; Wang, Xiaoyin [Wuhan Textile Univ., Wuhan (China)

    2014-02-15

    The process of petroleum involves in a large amount of oily wastewater that contains high levels of chemical oxygen demand (COD) and toxic compounds. So they must be treated before their discharge into the receptor medium. In this paper, wet peroxide oxidation (WPO) was adopted to treat the oily wastewater. Central composite design, an experimental design for response surface methodology (RSM), was used to create a set of 31 experimental runs needed for optimizing of the operating conditions. Quadratic regression models with estimated coefficients were developed to describe the COD removals. The experimental results show that WPO could effectively reduce COD by 96.8% at the optimum conditions of temperature 290 .deg. C, H{sub 2}O{sub 2} excess (HE) 0.8, the initial concentration of oily wastewater 3855 mg/L and reaction time 9 min. RSM could be effectively adopted to optimize the operating multifactors in complex WPO process.

  9. Materiais poliméricos para tratamento de água oleosa: utilização, saturação e regeneração Oily water treatment using polymeric material: use, saturation and regeneration

    Directory of Open Access Journals (Sweden)

    Yure G. C. Queiros

    2006-01-01

    Full Text Available Resinas poliméricas vêm sendo usadas como materiais alternativos para tratamento de águas oleosas, provenientes da indústria de petróleo, as quais já tenham sido tratadas por métodos convencionais. O objetivo deste trabalho é avaliar o grau de purificação de águas oleosas sintéticas, quando tratadas em colunas de leito fixo empacotadas com resinas poliméricas constituídas por segmentos hidrofílicos e lipofílicos. Foram preparadas águas oleosas sintéticas e a fluorimetria foi utilizada para determinar o teor total de óleos e graxas (TOG nas amostras de água recém-preparada e após eluição pela coluna. Os resultados mostraram que amostras de água tratadas com a coluna apresentaram valor de TOG não superior a 1% do valor de TOG da água oleosa preparada. Um estudo cinético mostrou que a eficiência de remoção dos contaminantes depende ligeiramente da vazão de eluição do sistema, sendo que valores de desempenho ótimos foram alcançados a uma vazão de 7,0 mL/min. A passagem de um volume de água oleosa de 11.087 vezes o volume do leito da coluna não foi suficiente para atingir a completa saturação do sistema. Ensaios preliminares de regeneração e reutilização da coluna mostraram seu potencial de uso em mais de 1 ciclo de tratamento de água oleosa.Polymeric resins have been used as alternative materials for treating oily waters from the petroleum industry, which have already been treated by conventional methods. The objective of this work was to evaluate the purification degree of synthetic oily waters when treated in fixed bed columns packed with hydrophilic/lipophilic resins. Synthetic oily waters were prepared and fluorimetry was used to determine the total grease and oil content (TGOC of the fresh oily water and the oily water eluted by the column. The results showed that the treated oily water presented a TGOC close to zero ppm. The kinetic study showed that the contaminant removal efficiency slightly

  10. Anion leaching from refinery oily sludge and ash from incineration of oily sludge stabilized/solidified with cement. Part II. Modeling.

    Science.gov (United States)

    Karamalidis, Athanasios K; Voudrias, Evangelos A

    2008-08-15

    This paper presents the modeling of anion leaching (SO4(2-) and CrO4(2-)) from refinery oily sludge and ash produced by incineration of oily sludge, stabilized/solidified (s/s) with two types of cement, 142.5 and 1142.5. Anion leaching was examined using a sequential toxicity characteristic leaching procedure (TCLP) test. To elucidate the mechanisms of sulfate and chromate leaching, we employed Visual MINTEQ, incorporating a multiple-problem setup. Specifically, 10-14 different problems, depending on the pH range of the leachates, were connected together in the same run. Each problem corresponded to one pH value of the leachate and the model run covered the pH range of the five sequential TCLP extractions. This modeling approach was tested using chemical equilibrium with or without sorption onto ferrihydrite. Good agreement between experimental and modeling results was obtained for sulfate leaching from solidified oily sludge and ash, considering surface complexation onto ferrihydrite on top of chemical equilibrium controlled by gypsum at pH 11. Chromate leaching was described by chemical equilibrium, controlled by CaCrO4(s) (at pH 11).

  11. Analysis of petroleum oily sludge producing in petroleum field of Rio Grande do Norte, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Cicero de Souza; Lima, Regineide Oliveira; Silva, Edjane Fabiula Buriti da; Castro, Kesia Kelly Vieira de; Chiavone Filho, Osvaldo; Araujo, Antonio Souza de [Universidade Federal do Rio Grande do Norte (UFRN), RN (Brazil)

    2012-07-01

    In exploration and production of petroleum is generated solid waste different and components other. The petroleum oily sludge is a complex mix of components different (water, oil and solid). The petroleum oily sludge generally has other residues and is formed during production and operations, transport, storage and petroleum refining (atmospheric residue, vacuum residue and catalytic cracking residue). However, according to its origin, the compositions can be found quite varied for sludge. Observing the process steps production and refining is possible to locate its main sources and percentage contributions in terms of waste generation. The elemental analysis was performed with oily sludge from region and it showed different composition. For carbon element and hydrogen, small differences was observed, but for was observed greater differences for Oxygen element. The sludge has different inorganic and organic composition. The sludge from oil water separator (OWS) 2 showed a greater amount of oil (94.88%), this may indicate a residue of aggregate high for petroleum industry. In analysis of Saturates, Aromatics, Resins and Asphaltenes (SARA), the sludge from unloading showed amount high of saturates. The inorganic material separated from sludge was characterized and sludge from OWS 2 had high amount sulfur (41.57%). The sludge analyzed showed organic components high values, so it can be treated and reprocessed in process units petroleum industry. The analysis thermal degradation had a better setting for treated oily sludge. (author)

  12. A review of the technological solutions for the treatment of oily sludges from petroleum refineries.

    Science.gov (United States)

    da Silva, Leonardo Jordão; Alves, Flávia Chaves; de França, Francisca Pessôa

    2012-10-01

    The activities of the oil industry have several impacts on the environment due to the large amounts of oily wastes that are generated. The oily sludges are a semi-solid material composed by a mixture of clay, silica and iron oxides contaminated with oil, produced water and the chemicals used in the production of oil. Nowadays both the treatment and management of these waste materials is essential to promote sustainable management of exploration and exploitation of natural resources. Biological, physical and chemical processes can be used to reduce environmental contamination by petroleum hydrocarbons to acceptable levels. The choice of treatment method depends on the physical and chemical properties of the waste as well as the availability of facilities to process these wastes. Literature provides some operations for treatment of oily sludges, such as landfilling, incineration, co-processing in clinkerization furnaces, microwave liquefaction, centrifugation, destructive distillation, thermal plasma, low-temperature conversion, incorporation in ceramic materials, development of impermeable materials, encapsulation and biodegradation in land farming, biopiles and bioreactors. The management of the technology to be applied for the treatment of oily wastes is essential to promote proper environmental management, and provide alternative methods to reduce, reuse and recycle the wastes.

  13. Analysis of Polluted Oily Water Management in Klaipėda Sea Port Klaipėda sea port contaminated oily water management analysis

    Directory of Open Access Journals (Sweden)

    Goda Zobėlaitė

    2010-04-01

    Full Text Available Lithuania is one of the countries that have ratified the Marpol 73/78 Convention which foresees the tools of reduction and prevention of sea pollution with bilge water and other substances. The Directive of the European Parliament and Council 2000/59/EB is addressed to the reduction of waste on board of ships and its wash overboard..
    Analysis of the ships entering Klaipėda Sea Port has estimated that oil waste comprises about 74 % of the whole collected waste amount. The analysis of technological flows and documents has indicated problematic points in the following processes:
    1. collection of oily and engine bilge water from ships;
    2. collection of spilled overboard oil products;
    3. exploitation of intermediate accumulative reservoirs in the port;
    4. regular transportation of accumulated oily water engine bilge water to the oil-polluted water treatment station;
    5. distribution, storage, treatment (mechanical, physical, sorption of pumped engine bilge water.
    Among oil polluted waste, its specific kind - oily water emerges in ports and it is called "engine bilge water" in the Waste Management Regulations. Engine bilge water is specific and hazardous to the environment as it is a liquid compound of water and oil products capable of making steady emulsions. It also acquires specific properties during various technological processes. Equipment, technological processes, specificity of the control related to combustibility and inflammability, as well as conformity to the requirements of the International and EU Rights, technological processes management and documents are needed for the management of this specific waste. For this reason, separation of this oily water from the common oil-polluted waste and analysis of these streams of waste treatment are of great importance in enhancement of the effectiveness of environmental protection during the management process of this oily waste.
    Applying a system approach

  14. Oily Fish Intake and Cognitive Performance in Community-Dwelling Older Adults: The Atahualpa Project.

    Science.gov (United States)

    Del Brutto, Oscar H; Mera, Robertino M; Gillman, Jennifer; Zambrano, Mauricio; Ha, Jung-eun

    2016-02-01

    Due to their high content of omega-3 polyunsaturated fatty acids, oily fish consumption is likely associated with a better cognitive performance. However, information on this association is controversial, with some studies showing a positive effect while others showing no association. We aimed to assess the effects of oily fish consumption on cognitive performance in a population of frequent fish consumers living in rural coastal Ecuador. Atahualpa residents aged ≥60 years were identified during a door-to-door survey and evaluated by the use of the Montreal Cognitive Assessment (MoCA). Oily fish servings per week were calculated in all participants. We estimated whether fish intake correlated with MoCA scores in generalized multivariate linear models adjusted for demographics, cardiovascular risk factors, edentulism and symptoms of depression. Out of 330 eligible persons, 307 (93%) were enrolled. Mean MoCA scores were 19 ± 4.8 points, and mean oily fish consumption was 8.6 ± 5.3 servings per week. In multivariate analyses, MoCA scores were related to fish servings (β 0.097, 95% CI 0.005-0.188, p = 0.038). Locally weighted scatterplot smoothing showed an inflection point in the total MoCA score curve at four fish servings per week. However, predictive margins of the MoCA score were similar across groups below and above this point, suggesting a direct linear relationship between oily fish intake and cognitive performance. Simple preventive measures, such as modifying dietary habits might be of value to reduce the rate of cognitive decline in community-dwelling older adults living in underserved populations.

  15. Attenuated Total Reflectance Fourier transform infrared spectroscopy for determination of Long Chain Free Fatty Acid concentration in oily wastewater using the double wavenumber extrapolation technique.

    Science.gov (United States)

    Hao, Zisu; Malyala, Divya; Dean, Lisa; Ducoste, Joel

    2017-04-01

    Long Chain Free Fatty Acids (LCFFAs) from the hydrolysis of fat, oil and grease (FOG) are major components in the formation of insoluble saponified solids known as FOG deposits that accumulate in sewer pipes and lead to sanitary sewer overflows (SSOs). A Double Wavenumber Extrapolative Technique (DWET) was developed to simultaneously measure LCFFAs and FOG concentrations in oily wastewater suspensions. This method is based on the analysis of the Attenuated Total Reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) spectrum, in which the absorbance of carboxyl bond (1710cm(-1)) and triglyceride bond (1745cm(-1)) were selected as the characteristic wavenumbers for total LCFFAs and FOG, respectively. A series of experiments using pure organic samples (Oleic acid/Palmitic acid in Canola oil) were performed that showed a linear relationship between the absorption at these two wavenumbers and the total LCFFA. In addition, the DWET method was validated using GC analyses, which displayed a high degree of agreement between the two methods for simulated oily wastewater suspensions (1-35% Oleic acid in Canola oil/Peanut oil). The average determination error of the DWET approach was ~5% when the LCFFA fraction was above 10wt%, indicating that the DWET could be applied as an experimental method for the determination of both LCFFAs and FOG concentrations in oily wastewater suspensions. Potential applications of this DWET approach includes: (1) monitoring the LCFFAs and FOG concentrations in grease interceptor (GI) effluents for regulatory compliance; (2) evaluating alternative LCFFAs/FOG removal technologies; and (3) quantifying potential FOG deposit high accumulation zones in the sewer collection system.

  16. Bender Gestalt Visual-Motor test – Sistema de Pontuação Gradual (B-SPG): A study with different samples

    OpenAIRE

    Ana Paula Porto Noronha; Fabian Javier Marin Rueda; Acacia Aparecida Angeli dos Santos

    2013-01-01

    The aim in this study was to analyze differences between children’s performances on the Bender – Sistema de Pontuação Gradual (B-SPG) [Gradual Scoring System] in the states of Minas Gerais and Paraíba, and to compare them with the results presented in the test manual. The participants were 511 children, both sexes, aged 6-10 years ( M = 8.21, SD = 1.33), and 50.7% male. The children were from two states, Minas Gerais ( n = 298, 58.3%) and Paraiba ( n = 213, 41.7%). The SPG was administered co...

  17. Bender Gestalt Visual-Motor test – Sistema de Pontuação Gradual (B-SPG): A study with different samples

    OpenAIRE

    Noronha, Ana Paula Porto; Rueda, Fabian Javier Marin; Santos,Acacia Aparecida Angeli dos

    2013-01-01

    The aim in this study was to analyze differences between children’s performances on the Bender – Sistema de Pontuação Gradual (B-SPG) [Gradual Scoring System] in the states of Minas Gerais and Paraíba, and to compare them with the results presented in the test manual. The participants were 511 children, both sexes, aged 6-10 years ( M = 8.21, SD = 1.33), and 50.7% male. The children were from two states, Minas Gerais ( n = 298, 58.3%) and Paraiba ( n = 213, 41.7%). ...

  18. Dynamics of bacterial populations during bench-scale bioremediation of oily seawater and desert soil bioaugmented with coastal microbial mats.

    Science.gov (United States)

    Ali, Nidaa; Dashti, Narjes; Salamah, Samar; Sorkhoh, Naser; Al-Awadhi, Husain; Radwan, Samir

    2016-03-01

    This study describes a bench-scale attempt to bioremediate Kuwaiti, oily water and soil samples through bioaugmentation with coastal microbial mats rich in hydrocarbonoclastic bacterioflora. Seawater and desert soil samples were artificially polluted with 1% weathered oil, and bioaugmented with microbial mat suspensions. Oil removal and microbial community dynamics were monitored. In batch cultures, oil removal was more effective in soil than in seawater. Hydrocarbonoclastic bacteria associated with mat samples colonized soil more readily than seawater. The predominant oil degrading bacterium in seawater batches was the autochthonous seawater species Marinobacter hydrocarbonoclasticus. The main oil degraders in the inoculated soil samples, on the other hand, were a mixture of the autochthonous mat and desert soil bacteria; Xanthobacter tagetidis, Pseudomonas geniculata, Olivibacter ginsengisoli and others. More bacterial diversity prevailed in seawater during continuous than batch bioremediation. Out of seven hydrocarbonoclastic bacterial species isolated from those cultures, only one, Mycobacterium chlorophenolicum, was of mat origin. This result too confirms that most of the autochthonous mat bacteria failed to colonize seawater. Also culture-independent analysis of seawater from continuous cultures revealed high-bacterial diversity. Many of the bacteria belonged to the Alphaproteobacteria, Flavobacteria and Gammaproteobacteria, and were hydrocarbonoclastic. Optimal biostimulation practices for continuous culture bioremediation of seawater via mat bioaugmentation were adding the highest possible oil concentration as one lot in the beginning of bioremediation, addition of vitamins, and slowing down the seawater flow rate.

  19. BACTERIAL POPULATION DYNAMICS IN WASTE OILY EMULSIONS FROM THE METAL-PROCESSING INDUSTRY

    Directory of Open Access Journals (Sweden)

    Paweł Kaszycki

    2014-07-01

    Full Text Available Oil-containing wastewaters are regarded as main industrial pollutants of soil and water environments. They can occur as free-floating oil, unstable or stable oil-in-water (O/W emulsions, and in the case of extreme organic load, as water-in-oil (W/O emulsions. In this study two types of oily effluents, a typical O/W emulsion marked as E1 and a W/O emulsion E2, both discharged by local metal processing plants were examined to test their toxicity to microbial communities and the ability to serve as nutrient sources for bacterial growth. The organic contaminant load of the samples was evaluated on the basis of chemical oxygen demand (COD parameter values and was equal to 48 200 mg O2·dm-3 and >300 000 mg O2·dm-3 for E1 and E2, respectively.Both emulsions proved to be non toxic to bacterial communities and were shown to contain biodiverse autochthonous microflora consisting of several bacterial strains adapted to the presence of xenobiotics (the total of 1.36 · 106 CFU·cm-3 and 1.72 · 105 CFU·cm-3 was determined for E1 and E2, respectively. These indigenous bacteria as well as exogenously inoculated specialized allochthonous microorganisms were biostimulated so as to proliferate within the wastewater environment whose organic content served as the only source of carbon. The most favorable cultivation conditions were determined as fully aerobic growth at the temperature of 25 ºC. In 9 to 18 day-tests, autochthonous as well as bioaugmented allochthonous bacterial population dynamics were monitored. For both emulsions tested there was a dramatic increase (up to three orders of magnitude in bacterial frequency, as compared to the respective initial values. The resultant high biomass densities suggest that the effluents are susceptible to bioremediation. A preliminary xenobiotic biodegradation test confirmed that mixed auto- and allochthonous bacterial consortia obtained upon inoculation of the samples with microbiocenoses preselected for efficient

  20. Comparison of cytotoxicity in vitro and irritation in vivo for aqueous and oily solutions of surfactants.

    Science.gov (United States)

    Czajkowska-Kośnik, Anna; Wolska, Eliza; Chorążewicz, Juliusz; Sznitowska, Małgorzata

    2015-01-01

    The in vivo model on rabbit eyes and the in vitro cytotoxicity on fibroblasts were used to compare irritation effect of aqueous and oily (Miglyol 812) solutions of surfactants. Tween 20, Tween 80 and Cremophor EL were tested in different concentrations (0.1, 1 or 5%) and the in vitro test demonstrated that surfactants in oil are less cytotoxic than in aqueous solutions. In the in vivo study, the aqueous solutions of surfactants were characterized as non-irritant while small changes in conjunctiva were observed after application the oily solutions of surfactants and the preparations were classified as slightly irritant, however this effect was similar when Miglyol was applied alone. In conclusion, it is reported that the MTT assay does not correlate well with the Draize scores.

  1. Experimental and computational investigation of polyacrylonitrile ultrafiltration membrane for industrial oily wastewater treatment

    Energy Technology Data Exchange (ETDEWEB)

    Adib Hooman; Hassanajili, Shadi; Sheikhi-Kouhsar, Mohammad Reza [Shiraz University, Shiraz (Iran, Islamic Republic of); Salahi, Abdolhamid; Mohammadi, Toraj [Iran University of Science and Technology (IUST), Tehran (Iran, Islamic Republic of)

    2015-01-15

    An experimental study on separation of industrial oil from oily wastewater has been done. A polyacrylonitrile membrane with a molecular weight cut-off (MWCO) of 20 kDa was used and an outlet wastewater of API unit of Tehran refinery was employed. The main purpose of this study was to develop a support vector machine model for permeation flux decline and fouling resistance in a cross-flow hydrophilic polyacrylonitrile membrane during ultrafiltration. The operating conditions which have been applied to develop a support vector machine model were transmembrane pressure (TMP), operating temperature, cross flow velocity (CFV), pH values of oily wastewater, permeation flux decline and fouling resistance. The testing results obtained by the support vector machine models are in very good agreement with experimental data. The calculated squared correlation coefficients for permeation flux decline and fouling resistance were both 0.99. Based on the results, the support vector machine proved to be a reliable accurate estimation method.

  2. Optimal hydration status for cryopreservation of intermediate oily seeds: Citrus as a case study.

    Science.gov (United States)

    Hor, Y L; Kim, Y J; Ugap, A; Chabrillange, N; Sinniah, U R; Engelmann, F; Dussert, S

    2005-06-01

    The purpose of this study was to investigate the basis of the optimal hydration status for cryopreservation of intermediate oily seeds using Citrus as a model. The relationships between equilibrium relative humidity (RH), seed water content, presence of freezable water as determined by DSC analysis, and germination percentage after immersion in liquid nitrogen (LN) were investigated in Citrus aurantifolia, C. grandis, C. madurensis and C. reticulata. The relationship between the lipid content of seeds and their unfrozen water content was also investigated. Independent of their level of seed desiccation tolerance, the optimal desiccation RH for seed tolerance to LN exposure was 75-80 % in the four species studied. This optimal hydration status always coincided with that at which presence of frozen water could not be detected in seed tissues during the cooling/thawing process. The unfrozen water content of seeds was variable between species and negatively correlated to seed lipid content. Using the present data, those obtained previously in seven coffee species and those reported by other authors for five other species, a significant linear relationship was found between the lipid content and the unfrozen water content of seeds. This study provides additional evidence that intermediate oily seeds do not withstand the presence of freezable water in their tissues during the cooling/warming process. Moreover, it offers two important applied perspectives: (1) independent of their level of desiccation tolerance, testing germination of seeds of a given oily seed species after equilibration in 75-80 % RH at 25 degrees C and LN exposure, gives a rapid and reliable evaluation of the possibility of cryopreserving whole seeds of this given species; (2) it is now possible to calculate the interval of water contents in which non-orthodox oily seeds of a given species are likely to withstand LN exposure as a function of their lipid content.

  3. Photocatalytic Degradation of Oil using Polyvinylidene Fluoride/Titanium Dioxide Composite Membrane for Oily Wastewater Treatment

    Directory of Open Access Journals (Sweden)

    Rusli Ummi Nadiah

    2016-01-01

    Full Text Available Production of industrial wastewater is increasing as the oil and gas industry grows rapidly over the years. The constituents in the industrial wastewater such as organic and inorganic matters, dispersed and lubricant oil and metals which have high toxicity become the major concern to the environment and ecosystem. There are many technologies are being used for oil removal from industrial wastewater. However, there are still needs to find an effective technology to treat oily wastewater before in can be discharge safely to the environment. Membrane technology is an attractive separation technology to treat oily wastewater. The aim of this study is to fabricate polyvinylidene/titanium dioxide (PVDF/TiO2 composite membrane with further treatment using hot pressed method to enhance the adhesion between TiO2 with the membrane surfaces. In this study the structural and physical properties of fabricated membrane were conducted using X-ray diffraction (XRD and Fourier transform infrared spectroscopy (FTIR respectively. The photocatalytic degradation of oil was measured using UV-Vis Spectroscopy. The FTIR results confirmed that, hot pressed PVDF/TiO2 membrane TiO2 was successfully deposited onto PVDF membranes surface and XRD results shows that the XRD pattern of PVDF//TiO2 found that the crystalline structure was remained unchanged after hot pressed. Clear water was obtained after synthetic oily wastewater was exposed to visible light for at least 6 hours. In conclusion, PVDF/TiO2 composite membrane can be a potential candidate to degrade oil in oily wastewater and suggested to possess an excellent performance if perform simultaneously with membrane separation process.

  4. In vitro Anthelmintic Activity of Oily Extracts of Azadirachta indica and Aqueous Extracts of Nicotiana tabacum on Gastrointestinal Nematodes in Goats

    Directory of Open Access Journals (Sweden)

    Richard Zapata Salas

    2013-12-01

    Full Text Available Gastrointestinal nematodes are the most common parasites found in ruminants in the world. These parasites cause parasitic gastroenteritis and have a negative effect on productivity. Nematode control has been based on the use of anthelmintic chemicals—against which nematodes have developed a certain degree of resistance—which have been rated as residual substances in goat products that may cause adverse effects on the final consumer. As a result, the study of plant components has been proposed as a sustainable alternative to control nematodosis in goats. The anthelmintic potential of aqueous extracts of Nicotiana tabacum and oily extracts of Azadirachta indica on gastrointestinal nematodes affecting the goat chain was evaluated in vitro in this study. Nematicidal activity tests were performed on stool samples from goats with a high parasite load (trichostrongyles, by performing dose/ response curves. Percent inhibition in egg hatch for the aqueous extract of N. tabacum and the oily extract of A. indica was 99% and 80%, respectively. Extracts showed an effect on larva 3 (infective stage, with a mean lethal time of 8 ± 1 minutes for extracts of N. Tabacum, and of 8 ± 1 minutes for extract of A. indica. The in vitro results of the nematicidal activity show that N. tabacum and A. indica extracts can be a promising alternative for controlling nematodes in ruminants.

  5. Effect of ultrasonic reactor and auxiliary stirring on oil removal from oily sludge.

    Science.gov (United States)

    Zhao, Xiaofei; Zhang, Xiaoyang; Liu, Lixin; Fan, Lei; Ge, Dan

    2017-03-13

    In this paper, oily sludge cleaning by using ultrasonic waves was further studied to ensure how the ultrasonic reactor, such as material, bottom thickness, diameter, and auxiliary mixing, effects oil removal from oily sludge. Oily sludge (S) with an initial oil content of 19.29% was mixed with distilled water (W) and treated in an ultrasonic cleaning tank, f = 40,000 Hz at 30°C. This paper was carried out around the ultrasonic reactor, such as material, diameter, and bottom thickness. The results show that acoustic resistance is the main factor affecting the material of the ultrasonic reactor. The larger the diameter of the reaction, the lower the thickness of the S-W mixture of the same quality; the smaller the diffusion attenuation of the ultrasonic wave, the higher the oil removal rate. In this paper, the cleaning efficiency seems to be independent of the bottom thickness of the reactor. This may be due to the hale wavelengths (λ/2) in polyethylene (λ/2 = 2.4 cm) and glass (λ/2 = 7.08 cm) being far greater than the range of bottom thickness. Proper mixing (200 rmin(-1)) can improve the oil removal rate (92.8%), increased by 8.69%, but when the strength is too large, the oil removal rate is reduced.

  6. Biotreatment of oily wastewater by rhamnolipids in aerated active sludge system

    Institute of Scientific and Technical Information of China (English)

    Hong-zi ZHANG; Xu-wei LONG; Ru-yi SHA; Guo-liang ZHANG; Qin MENG

    2009-01-01

    Oily wastewater generated by various industries creates a major ecological problem throughout the world. The tra-ditional methods for the oily wastewater treatment are inefficient and costly. Surfactants can promote the biodegradation of pe-troleum hydrocarbons by dispersing oil into aqueous environment. In the present study, we applied rhamnolipid-containing cell-free culture broth to enhance the biodegradation of crude oil and lubricating oil in a conventional aerobically-activated sludge system. At 20 ℃, rhamnolipids (11.2 mg/L) increased the removal efficiency of crude oil from 17.7% (in the absence of rham-nolipids) to 63%. At 25 ℃, the removal efficiency of crude oil was over 80% with the presence of rhamnolipids compared with 22.3% in the absence of rhamnolipids. Similarly, rhamnolipid treatment (22.5 mg/L) for 24 h at 20 ℃ significantly increased the removal rate of lubricating oil to 92% compared with 24% in the absence of rhamnolipids. The enhanced removal of hydrocarbons was mainly attributed to the improved solubility and the reduced interracial tension by rhamnolipids. We conclude that a direct application of the crude rhamnolipid solution from cell culture is effective and economic in removing oily contaminants from wastewater.

  7. Bacterial adhesion and biofilm formation over a substrate with micro printed oily patches

    Science.gov (United States)

    Jalali, Maryam; Sheng, Jian

    2014-11-01

    Over the past few years, there has been a significant focus on the processes involved in biodegradation of crude oil. In prior studies, using soft lithography and surface functionalization, we have fabricated solid substrates with micro-scale chemical patterns, and applied them to studying the bacteria-surface interactions as well as the formation of biofilm over these micro-patterned surfaces. A strong correlation between biofilm morphology and substrate patterns was found. In our current work we investigate the bacterial adhesion and biofilm formation of hydrocarbon degrading bacteria on micro printed oily surfaces with different micro-scale textures. The oily patterns were formed by contact printing of crude oil on a glass substrate with PDMS stamps. The oil patterned surface is additionally combined with a microfluidics as its bottom substrate. This unique lab-on-a-chip device allows us to investigate the complex interactions microscopically and over a long time. Additionally, it allows us to conduct experiments to elucidate the dynamic interactions such as swimming, dispersion, attachment, detachment, and adsorption between bacteria and micro printed oily surfaces under flow conditions in-situ. The growth rates and morphology of bacterial colony and biofilm are also studied and reported.

  8. Separation efficiency of two waste polymer fibers for oily water treatment

    Directory of Open Access Journals (Sweden)

    Sokolović Dunja S.

    2016-01-01

    Full Text Available This work is concerned with the efficiency of two different waste polymeric materials as the filter media in a laboratory-scale bed coalescer in the horizontal fluid flow mode, operating in a steady-state regime. The applied materials are: waste polyethylene terephthalate from textile industry, BA1 and waste polypropylene from carpet industry, PP. Using these compressible fiber polymeric materials, high bed porosity (up to 98% could be obtained. The investigation was carried out over a wide range of working conditions. Bed permeability was varied in the range from 0.18•10-9 to 5.389•10-9 m2. Operating fluid velocity was varied from 19 to 80 m/h, until the critical velocity was reached. Different oily wastewaters were used in the experiments. Oily wastewater is defined as the oil-inwater emulsion model prepared using mineral oils of different physico-chemical characteristics: crude oil (A from Vojvodina region, two vacuum distillation fractions (A1, A4, and blended petroleum product with a high paraffinic content (P1. Both applied polymeric materials, BA1 and PP, showed high separation efficiency for treatment of all investigated oily wastewater. However, the BA1 material showed higher efficiency in a wider range of bed permeability and physico-chemical characteristics of oil. [Projekat Ministarstva nauke Republike Srbije, br. 172022

  9. Sampling

    CERN Document Server

    Thompson, Steven K

    2012-01-01

    Praise for the Second Edition "This book has never had a competitor. It is the only book that takes a broad approach to sampling . . . any good personal statistics library should include a copy of this book." —Technometrics "Well-written . . . an excellent book on an important subject. Highly recommended." —Choice "An ideal reference for scientific researchers and other professionals who use sampling." —Zentralblatt Math Features new developments in the field combined with all aspects of obtaining, interpreting, and using sample data Sampling provides an up-to-date treat

  10. Los Sistemas Peatonales Como Sistemas De Transporte

    Directory of Open Access Journals (Sweden)

    Lindsay Álvarez Pomar

    2015-01-01

    Full Text Available Los sistemas peatonales han cobrado importancia dentro de los sistemas de movilidad debido al aumento de los viajes peatonales. Este aumento se ha debido a la concientización de las personas sobre las ventajas de caminar, al aumento del uso de los sistemas de transporte público y en algunos casos a los escasos recursos económicos. En la última década, los sistemas peatonales han sido incluidos en la planeación de movilidad de algunas ciudades. Sin embargo, su definición formal carece del despliegue de sus componentes, así como del análisis de las interrelaciones entre los mismos. Se presenta una propuesta que puede servir de base para su definición formal, con el fin de ser usada para su análisis y diseño. Se concluye que las definiciones actuales no cubren todos los aspectos clave de los sistemas peatonales, para que puedan ser un buen soporte para la toma de decisiones sobre este tipo de sistemas y se distinguenlos componentes estructurales que se consideran importantes.

  11. Sustainable water recovery from oily wastewater via forward osmosis-membrane distillation (FO-MD).

    Science.gov (United States)

    Zhang, Sui; Wang, Peng; Fu, Xiuzhu; Chung, Tai-Shung

    2014-04-01

    This study proposed and investigated a hybrid forward osmosis - membrane distillation (FO-MD) system for sustainable water recovery from oily wastewater by employing lab-fabricated FO and MD hollow fiber membranes. Stable oil-in-water emulsions of different concentrations with small droplet sizes (<1 μm) were firstly prepared and applied as the feed solution in the FO process. Fouling was immediately observed in the FO mode and was low on the cellulose triacetate (CTA) - based thin film composite (TFC) membranes. Moreover, slight increment of fouling was observed in the first few hours and the water flux was then stabilized over 24 h. The characterizations of water flux and solute rejection in separate FO and MD processes revealed that a high water flux, good NaCl rejection, impressively high retention of oil droplets and partial permeation of acetic acid could be achieved. Finally, an integrated FO-MD system was developed to treat the oily wastewater containing petroleum, surfactant, NaCl and acetic acid at 60 °C in the batch mode. The water flux in FO undergoes three-stage decline due to fouling and reduction in osmotic driving force, but is quite stable in MD regardless of salt concentration. Oily wastewater with relatively high salinity could be effectively recovered by the FO-MD hybrid system while maintaining large water flux, at least 90% feed water recovery could be readily attained with only trace amounts of oil and salts, and the draw solution was re-generated for the next rounds of FO-MD run. Interestingly, significant amount of acetic acid was also retained in the permeate for further reuse as a chemical additive during the production of crude oil. The work has demonstrated that not only water but also organic additives in the wastewater could be effectively recovered by FO-MD systems for reuse or other utilizations. Copyright © 2014 Elsevier Ltd. All rights reserved.

  12. Recycling soil nitrate nitrogen by amending agricultural lands with oily food waste.

    Science.gov (United States)

    Rashid, M T; Voroney, R P

    2003-01-01

    With current agricultural practices the amounts of fertilizer N applied are frequently more than the amounts removed by the crop. Excessive N application may result in short-term accumulation of nitrate nitrogen (NO3-N) in soil, which can easily be leached from the root zone and into the ground water. A management practice suggested for conserving accumulated NO3-N is the application of oily food waste (FOG; fat + oil + greases) to agricultural soils. A two-year field study (1995-1996 and 1996-1997) was conducted at Elora Research Center (43 degrees 38' N, 80 degrees W; 346 m above mean sea level), University of Guelph, Ontario, Canada to determine the effect of FOG application in fall and spring on soil NO3-N contents and apparent N immobilization-mineralization of soil N in the 0- to 60-cm soil layer. The experiment was planned under a randomized complete block design with four replications. An unamended control and a reference treatment [winter wheat (Triticum aestivum L.) cover crop] were included in the experiment to compare the effects of fall and spring treatment of oily food waste on soil NO3-N contents and apparent N immobilization-mineralization. Oily food waste application at 10 Mg ha(-1) in the fall decreased soil NO3-N by immobilization and conserved 47 to 56 kg NO3-N ha(-1), which would otherwise be subject to leaching. Nitrogen immobilized due to FOG application in the fall was subsequently remineralized by the time of fertilizer N sidedress, whereas no net mineralization was observed in spring-amended plots at the same time.

  13. Treatment of Oily Wastewater Produced From Old Processing Plant of North Oil Company

    Directory of Open Access Journals (Sweden)

    Dr. Faris Hammoodi Al-Ani

    2012-03-01

    Full Text Available The main objectives of this research were to study and analyses oily wastewater characteristics originating from old-processing plant of North Oil Company and to find a suitable and simple method to treat the waste so it can be disposed off safely. The work consists of two stages; the first was the study of oily wastewater characteristics and its negative impacts. The results indicated that oil and grease were the most dominant pollutant with concentration range between 1069 – 3269.3 mg/l that must be removed; other pollutants were found to be within Iraqi and EPA standards. The next stage was the use of these characteristics to choose the proper technology to treat that wastewater. This stage was divided into two stages: the first stage was a jar tests to find the optimum doses of alum, lime and powdered activated carbon (PAC. The second stage was the treatment by a batch pilot plant constructed for this purpose employing the optimum doses as determined from the first stage to treat the waste using a flotation unit followed by a filtration-adsorption unit. The removal efficiencies of flotation unit for oil and grease, COD, and T.S.S found to be 0.9789, 0.974, and 0.9933, respectively, while the removal efficiency for T.D.S was very low 0.0293. From filtration – adsorption column the removal efficiencies of oil and grease, T.D.S, COD, and T.S.S were found to be 0.9486, 0.8908, 0.6870, and 0.7815, respectively. The overall removal efficiencies of pilot plant were 0.9986, 0.8939, 0.9921, and 0.9950, respectively. The results indicated that this type of treatment was the simplest and most effective method that can be used to treat produced oily wastewater before disposal

  14. Treatment of the oily waste sludges through thermal plasma in absence of oxygen

    Energy Technology Data Exchange (ETDEWEB)

    Castaneda J, G.; Pacheco S, J. [Instituto Nacional de Investigaciones Nucleares. Laboratorio de Aplicaciones de Plasmas Termicos. Apdo. Postal 18-1027. C.P. 11801 Mexico D.F. (Mexico)

    2001-07-01

    The thermal plasma process in absence of oxygen for the degradation of oily waste sludges was evaluated. These residues are commonly generated in the petrochemical industry and are considered hazardous wastes according to the present environmental regulations. The process was operated using difference residence times and the characteristics of the gaseous by products and residual soils were determined. The efficiency of organic matter degradation was 99.99%. The attained volume reduction, under the best conditions was 95.5%. The residual soils were composed of carbon and clays. The residual gases have low molecular weight. The resulting final wastes were non-hazardous and could be disposed of in landfills. (Author)

  15. Effects of oily fish intake on cardiovascular risk markers, cognitive function, and behavior in school-aged children

    DEFF Research Database (Denmark)

    Damsgaard, Camilla T.; Lauritzen, Lotte; Hauger, Hanne;

    2016-01-01

    and sleep. We will also examine effects on cognitive function (attention, memory, and executive functions) by using standardized tests, behavior and emotions by administering parent-rated questionnaires and child interviews, and we will measure physiological stress response and cortisol levels. We need 150...... and behavior. However, to our knowledge, the potential effects of oily fish on cardiometabolic health, cognitive function, and behavior in children have not been investigated. The aim of the FiSK Junior study is to investigate the effects of oily fish consumption on cardiovascular risk markers, cognitive...... function, and behavior in healthy children. Methods/design We are conducting a randomized controlled trial with 8- to 9-year-old Danish children, comparing the effect of consuming 300 g/week of oily fish with poultry (control) for 12 weeks between August 2016 and June 2017. The primary outcomes are blood...

  16. The response of maize (Zea mays L.) plant assisted with bacterial consortium and fertilizer under oily sludge.

    Science.gov (United States)

    Shahzad, Asim; Saddiqui, Samina; Bano, Asghari

    2016-01-01

    The objective of this study was to evaluate the role of PGPR consortium and fertilizer alone and in combination on the physiology of maize grown under oily sludge stress environment as well on the soil nutrient status. Consortium was prepared from Bacillus cereus (Acc KR232400), Bacillus altitudinis (Acc KF859970), Comamonas (Delftia) belonging to family Comamonadacea (Acc KF859971) and Stenotrophomonasmaltophilia (Acc KF859973). The experiment was conducted in pots with complete randomized design with four replicates and kept in field. Oily sludge was mixed in ml and Ammonium nitrate and Diammonium phosphate (DAP) were added at 70 ug/g and 7 ug/g at sowing. The plant was harvested at 21 d for estimation of protein, proline and antioxidant enzymes superoxide dismutase (SOD) and peroxidase (POD). To study the degradation, total petroleum hydrocarbon was extracted by soxhelt extraction and extract was analyzed by GC-FID at different period after incubation. Combined application of consortium and fertilizer enhanced the germination %, protein and, proline content by 90,130 and 99% higher than untreated maize plants. Bioavailability of macro and micro nutrient was also enhanced with consortium and fertilizer in oily sludge. The consortium and fertilizer in combined treatment decreased the superoxide dismutase (SOD), peroxidase dismutase (POD) of the maize leaves grown in oily sludge. Degradation of total petroleum hydrocarbon (TPHs) was 59% higher in combined application of consortium and fertilizer than untreated maize at 3 d. The bacterial consortium can enhanced the maize tolerance to oily sludge and enhanced degradation of total petroleum hydrocarbon (TPHs). The maize can be considered as tolerant plant species to remediate oily sludge contaminated soils.

  17. Experimental investigation and modeling of industrial oily wastewater treatment using modified polyethersulfone ultrafiltration hollow fiber membranes

    Energy Technology Data Exchange (ETDEWEB)

    Salahi, Abdolhamid; Mohammadi, Toraj [Iran University of Science and Technology (IUST), Tehran (Iran, Islamic Republic of); Behbahani, Reza Mosayebi [Petroleum University of Technology (PUT), Ahwaz (Iran, Islamic Republic of); Hemmati, Mahmood [Research Institute of Petroleum Industry, Tehran (Iran, Islamic Republic of)

    2015-06-15

    Hollow fiber membranes were prepared from polyethersulfone/additives/NMP and DMSO system via phase inversion induced by precipitation in non-solvent coagulation bath. The interaction effects of polyethylene-glycol (PEG), propionic-acid (PA), Tween-20, PEG molecular weight and polyvinyl-pyrrolidone (PVP) on morphology and performance of synthesized membranes were investigated. Taguchi method (L{sub 16} orthogonal array) was used initially to plan a minimum number of experiments. 32 membranes were synthesized (with two replications) and their permeation flux and TOC rejection properties to oily wastewater treatment were studied. The obtained results indicated that addition of PA to spinning dope decreases flux while it increases TOC rejection of prepared membranes. Also, the result shows that addition of PVP, Tween-20 and PEG content in spinning dope enhances permeation flux while reducing TOC rejection. The obtained results indicated that the synthesized membranes was effective and suitable for treatment of the oily wastewater to achieve up to 92.6, 98.2, and 98.5% removal of TOC, TSS, and OGC, respectively with a flux of 247.19 L/(m{sup 2}h). Moreover, Hermia's models were used for permeation flux decline prediction. Experimental data and models predictions were compared. The results showed that there is reasonable agreement between experimental data and the cake layer model followed by the intermediate blocking model.

  18. Purification of oily wastewater in thermal power plant by coal fly ash

    Institute of Scientific and Technical Information of China (English)

    刘仁龙; 陈维; 刘清才

    2009-01-01

    The removal of oil from oily wastewater in thermal power plant by coal fly ash(CFA) was investigated. It contained about 2.5 g/L of mineral oil,which had to be treated efficiently before it was discharged. The experiments were carried out as a function of different initial concentrations of oil,mass dosage,contact time and pH value to obtain the optimum conditions for the removal of oil from oily wastewater. The experimental results show that CFA presents the most suitable conditions for the removal of oil from waste-water at a dosage of CFA 2.5 g/L,15 min of contact time and a pH value of 4.8. The adsorption process is performed with almost 96% of oil removal from wastewater. The kinetic data meet the second-order kinetic model. The Langmuir and Freundlich adsorption models were applied to describing the experimental isotherms and isotherm constants. The equilibrium data fit very well with the Freundlich model.

  19. Low-temperature pyrolysis of oily sludge: roles of Fe/Al-pillared bentonites

    Directory of Open Access Journals (Sweden)

    Jia Hanzhong

    2017-09-01

    Full Text Available Pyrolysis is potentially an effective treatment of oily sludge for oil recovery, and the addition of a catalyst is expected to affect its pyrolysis behavior. In the present study, Fe/Al-pillared bentonite with various Fe/Al ratios as pyrolysis catalyst is prepared and characterized by XRD, N2 adsorption, and NH3-TPD. The integration of Al and Fe in the bentonite interlayers to form pillared clay is evidenced by increase in the basal spacing. As a result, a critical ratio of Fe/Al exists in the Fe/Al-pillared bentonite catalytic pyrolysis for oil recovery from the sludge. The oil yield increases with respect to increase in Fe/Al ratio of catalysts, then decreases with further increasing of Fe/Al ratio. The optimum oil yield using 2.0 wt% of Fe/Al 0.5-pillared bentonite as catalyst attains to 52.46% compared to 29.23% without catalyst addition in the present study. In addition, the addition of Fe/Al-pillared bentonite catalyst also improves the quality of pyrolysis-produced oil and promotes the formation of CH4. Fe/Al-pillared bentonite provides acid center in the inner surface, which is beneficial to the cracking reaction of oil molecules in pyrolysis process. The present work implies that Fe/Al-pillared bentonite as addictive holds great potential in industrial pyrolysis of oily sludge.

  20. Treatment of emulsified oily wastewater by commercial scale electrocoagulation at Vancouver shipyards

    Energy Technology Data Exchange (ETDEWEB)

    Stephenson, R.J.; Tennant, B.D. [McKay Creek Technologies Ltd., North Vancouver, BC (Canada); Hartle, D.R. [Vancouver Shipping Co. Ltd., BC (Canada); Stuckert, B. [Quantum Environmental Group, Richmond, BC (Canada)

    2002-06-01

    Some of the emulsified oily wastewater generated by the Washington Marine Group fleet and the Vancouver shipyards are from sources such as bilge water, tank wash water from gas freeing operations, ballast water, and wastewater from pressure washing equipment. The Washington Marine Group is the largest shipbuilding, ship maintenance and repair, and marine transportation company in Canada, a group to which McKay Creek Technologies belongs. A investigation was performed in an attempt to find commercially viable means of treating this wastewater. McKay Creek Technologies developed its own cleaning process. Electrocoagulation is a process based on the use of an electrical current in an electrochemical cell to coagulate contaminants in wastewater. With three years of experience gained by treating the wastewater of the Washington Marine Group operations at Vancouver shipyards using this technology, McKay Creek Technologies has found ways to treat emulsified oily wastewater simply and effectively. It has been determined that electrocoagulation is an effective treatment method for emulsified oils, poly-nuclear aromatic hydrocarbons (PAHs), poorly settling solids, poorly soluble organics, contaminants which add turbidity to water, and negatively charged metal species like arsenic, molybdenum, and phosphate. A brief history of electrocoagulation was provided, and the authors explained the process and how it was applied to the situation at Vancouver shipyards. 2 refs., 5 tabs., 1 fig.

  1. Extremely efficient and recyclable absorbents for oily pollutants enabled by ultrathin-layered functionalization.

    Science.gov (United States)

    Wang, Qianqian; Wang, Hanghua; Xiong, Sen; Chen, Rizhi; Wang, Yong

    2014-11-12

    Oils and organic solvents that leak into water bodies must be promptly removed to avoid ecological disasters, for example, by selective absorption using oleophilic absorbents. However, it remains a challenge for the low-cost synthesis of efficient and recyclable absorbents for oily pollutants. By surface functionalization to inexpensive polyurethane (PU) foams, we synthesize oil absorbents exhibiting the highest absorption capacity and the best recyclability among all polymeric absorbents. The synthesis is enabled by atomic layer deposition of ∼5 nm-thick Al2O3 transition layer onto the skeleton surface of PU foams, followed by coupling a single-molecule layer of silanes to the Al2O3 layer. The sub-10 nm functionalization layer provides the PU foam an outstanding water-repelling and oil-absorbing functionality without compromising its high porosity and elasticity. The functionalized foam is able to quickly absorb oily pollutants spread on water surfaces or precipitated in water with a capacity more than 100 times its own weight. This ultrathin-layer-functionalization method is also applicable to renewable porous biomaterials, providing a sustainable solution for oil spills. Moreover, we propose devices than can continuously operate to efficiently collect oil spills from water surfaces based on the functionalized PU foam developed in this work.

  2. Treatment of phosphate-containing oily wastewater by coagulation and microfiltration

    Institute of Scientific and Technical Information of China (English)

    ZHANG Jin; SUN Yu-xin; HUANG Zhi-feng; LIU Xing-qin; MENG Guang-yao

    2006-01-01

    The oily wastewater generated from pretreatment unit of electrocoating industry contains oils, phosphate, organic solvents,and surfactants. In order to improve the removal efficiencies of phosphate and oils, to mitigate the membrane fouling, coagulation for ceramic membrane microfiltration of oily wastewater was performed. The results of filtration tests show that the membrane fouling decreased and the permeate flux and quality increased with coagulation as pretreatment. At the coagulant Ca (OH)2 dosage of 900 mg/L, the removal efficiency of phosphate was increased from 46.4% without coagulation to 99.6%; the removal of COD and oils were 97.0% and 99.8%, respectively. And the permeate flux was about 70% greater than that when Ca(OH)2 was not used. The permeate obtained from coagulation and microfiltration can be reused as make-up water, and the recommended operation conditions for pilot and industrial application are transmembrane pressure of 0.10 MPa and cross-flow velocity of 5 m/s. The comparison results show that 0.2 μm ZrO2 microfilter with coagulation could be used to perform the filtration rather than conventional ultrafilter, with very substantial gain in flux and removal efficiency of phosphate.

  3. Stabilization of oily sediments for cap closure of a refinery oxidation pond

    Energy Technology Data Exchange (ETDEWEB)

    Schifano, V. [ARCADIUS US Inc., Chelmsford, MA (United States); Fabian, K. [ARCADIUS US Inc., Seattle, WA (United States); Weise, T. [ARCADIUS US Inc., Los Altos, CA (United States)

    2010-07-01

    This paper discussed a remediation project in which over 400,000 m{sup 3} of oily sediments, dredged sediments, and soils were used to construct a cap foundation layer for the closure of a refinery oxidation pond used as a regulated waste disposal unit. A value engineering approach was used to identify alternative design schemes and construction methods for the project. Field cone penetration tests were used to test the sediments after curing under field environmental and stress conditions. The stabilization design for the pond was developed to account for heterogeneities in sediment properties as well as time variability in groundwater fluctuations and weather conditions. A binder was optimized to minimize deficiencies and achieve a low rate of re-testing and subsequent stabilization repairs. Depositional and post-depositional projects including self-weight consolidation and drying during the 2 years preceding the stabilization transformed the diluted slurry of dredged sediments into a layer of stiff semi-dry silty clay. The silty clay was then blended with the oily sediments to form a cap foundation layer of a least 0.6 m thickness. A liner was placed on the cap foundation to minimize infiltration into the waste unit. Over $4 million was saved using the new approach. 17 refs., 2 tabs., 7 figs.

  4. Synthesis of microbial elastomers based on soybean oily acids. Biocompatibility studies

    Energy Technology Data Exchange (ETDEWEB)

    Hazer, Derya Burcu [Department of Neurosurgery, Faculty of Medicine, School of Medicine, Hacettepe University, Sihhiye, 06100 Ankara (Turkey); Hazer, Baki [Department of Chemistry, Zonguldak Karaelmas University, 67100 Zonguldak (Turkey); Kaymaz, Figen, E-mail: burcuhazer@hotmail.co, E-mail: bkhazer@karaelmas.edu.t [Department of Histology, Faculty of Medicine, School of Medicine, Hacettepe University, Sihhiye, 06100 Ankara (Turkey)

    2009-06-15

    Biocompatibility studies of the autoxidized and unoxidized unsaturated medium-long chain length (m-lcl) co-poly-3-hydroxyalkanoates (m-lclPHAs) derived from soya oily acids have been reported. Pseudomonas oleovorans was grown on a series of mixtures of octanoic acid (OA) and soya oily acids (Sy) with weight ratios of 20:80, 28:72 and 50:50 in order to obtain unsaturated m-lcl copolyesters coded PHO-Sy-2080, PHO-Sy-2872 and PHO-Sy-5050, respectively. The PHA films were obtained by solvent cast from CHCl{sub 3}. They were all originally sticky and waxy except PHO-Sy-5050. Autoxidation of the unsaturated copolyester films was carried out on exposure to air at room temperature in order to obtain crosslinked polymers. They became a highly flexible elastomer after being autoxidized (about 40 days of autoxidation). The in vivo tissue reactions of the autoxidized PHAs were evaluated by subcutaneous implantation in rats. The rats appeared to be healthy throughout the implantation period. No symptom such as necrosis, abscess or tumorigenesis was observed in the vicinity of the implants. Retrieved materials varied in their physical appearance after 6 weeks of implantation. In vivo biocompatibility studies of the medical applications indicated that the microbial copolyesters obtained were all biocompatible and especially the PHOSy series of copolyesters had the highest biocompatibility among them.

  5. 40 CFR 761.283 - Determination of the number of samples to collect and sample collection locations.

    Science.gov (United States)

    2010-07-01

    ... sites at this example location: a loading dock, a transformer storage lot, and a disposal pit. The... (three samples). The non-liquid PCB remediation wastes present at the transformer storage lot are oily... north and one meter in the direction east of magnetic north. (2) Mark out a series of sampling points...

  6. Sistemas roboticos teleoperados

    Directory of Open Access Journals (Sweden)

    Alexander Ceron Correa

    2005-01-01

    Full Text Available En el presente artículo se realiza una revisión general sobre los sistemas robóticos teleoperados, su estructura, componentes principales, clasificación, tipos de sensores, sistemas de locomoción y aplicaciones; como ejemplo se mencionan algunos trabajos realizados Colombia y en el mundo

  7. Sistemas roboticos teleoperados

    OpenAIRE

    Alexander Ceron Correa

    2005-01-01

    En el presente artículo se realiza una revisión general sobre los sistemas robóticos teleoperados, su estructura, componentes principales, clasificación, tipos de sensores, sistemas de locomoción y aplicaciones; como ejemplo se mencionan algunos trabajos realizados Colombia y en el mundo

  8. Sposobnost opstanka informacionih sistema

    OpenAIRE

    Bosko Rodic; Dejan Vuletic

    2005-01-01

    U radu je opisan znacaj i trend razvoja informacionih sistema u savremenom drustvu, a definisani su i drugi znacajni pojmovi radi boljeg razumevanja problema. Prikazana su i cetiri aspekta resenja sposobnosti opstanka informacionih sistema koje predlaze Computer Emergency Response Team (CERT).

  9. [Isolation of an excellent bio-flocculant-producing strain and its application in the treatment of cold-rolling waste oily water].

    Science.gov (United States)

    Lei, Guo-Yuan; Ding, Cui-Ping; Yang, Jia-Xuan

    2011-09-01

    An excellent strain (designated as T-3) which produces bio-flocculants was isolated from soil samples, and identified as Klebsiella sp. species based on the analysis of morphology, physiology and biochemistry and 16S rDNA sequences measurement. The effects of culture conditions such as pH values, temperature, carbon sources and nitrogen sources on bio-flocculants production by T-3 strain were studied. The experiment results show that T-3 strain has better adaptability to carbon sources and nitrogen sources, and higher capacity of bio-flocculants was obtained when the initial pH value of culture and temperature were 9 and 25 degrees C respectively. Based on the colorimetric reactions of proteins and polysaccharide substance, ultraviolet scanning analysis and Fourier Transform Infrared Spectroscopy analysis, it is found that the bio-flocculants produced by T-3 strain contains -OH and -COO(-) groups and belongs to anionic type flocculant. Moreover, the main component is polysaccharides. The treatment of oily cold-rolling wastewater by the bio-flocculant was investigated and the better result was obtained. When the dosages of CaCl2, bio-flocculants and poly aluminium chloride were 4 g x L(-1), 10% (volume fraction) and 1 g x L(-1) respectively, and the pH value was 7.0, the oil concentration, COD and turbidity were decreased to 10 mg x L(-1), 218.4 mg x L(-1) and 1.36 from 4 819 mg x L(-1), 28 456.8 mg x L(-1) and 3 950 with the removal efficiencies of 99.79%, 92.32% and 99.97% respectively. The interaction between flocculant and oily droplets is achieved by the interaction of Van der Waals force, hydrogen bond and the bridged coordination of Ca2+, in which the bridged coordination of Ca2+ is the dominant.

  10. Oily calcium hydroxide suspension (Osteoinductal) used as an adjunct to guided bone regeneration: an experimental study in rats.

    NARCIS (Netherlands)

    Stavropoulos, A.; Geenen, C.; Nyengaard, J.R.; Karring, T.; Sculean, A.

    2007-01-01

    OBJECTIVES: To evaluate whether an oily calcium hydroxide suspension (OCHS) promotes bone healing when used as an adjunct to guided bone regeneration (GBR). MATERIAL AND METHODS: Rigid, hemispherical, teflon capsules were placed with their open part facing the lateral surface of the ramus on both si

  11. Photocatalytic pretreatment of oily wastewater from the restaurant by a vacuum ultraviolet/TiO2 system.

    Science.gov (United States)

    Kang, Jian-xiong; Lu, Lu; Zhan, Wei; Li, Bo; Li, Dao-sheng; Ren, Yong-zheng; Liu, Dong-qi

    2011-02-15

    The present study aims at investigating the performance of a vacuum ultraviolet (VUV, 185 nm) and TiO(2) oxidation system for the pretreatment of oily wastewater from restaurant. The influence of irradiation time, pH, dissolved oxygen (DO), the dosage of TiO(2) and the initial chemical oxygen demand (COD) concentration on COD removal efficiency was ascertained and optimum process conditions for stable and effective operation were determined. Under the optimum conditions of irradiation 10 min, initial COD 3981 mg/L, TiO(2) 150 mg/L, pH 7.0 and flow rate of air 40 L/h, the process of VUV and TiO(2)/VUV achieved removal efficiencies of COD, BOD(5) and oil as 50±3%, 37±2%, 86±3%, and 63±3%, 43±2%, 70±3%, respectively. The biodegradability factor f(B) of the wastewater was determined as 1.56 which indicated that the VUV/TiO(2) process improved the biodegradability of the oily wastewater significantly. Results clearly indicate that VUV/TiO(2) photolysis tends to destruct parts of COD, BOD(5), and ammonia, as well as enhances the biodegradability of the oily wastewater simultaneously. Thus, this technique could be used as a pretreatment step for conventional biological treatment of oily wastewater. Copyright © 2010 Elsevier B.V. All rights reserved.

  12. Oily Fish Intake during Pregnancy--Association with Lower Hyperactivity but Not with Higher Full-Scale IQ in Offspring

    Science.gov (United States)

    Gale, Catharine R.; Robinson, Sian M.; Godfrey, Keith M.; Law, Catherine M.; Schlotz, Wolff; O'Callaghan, F. J.

    2008-01-01

    Background: Long-chain omega-3 polyunsaturated fatty acids are thought to be important for fetal neurodevelopment. Animal studies suggest that a deficiency of omega-3 fatty acids may lead to behavioural or cognitive deficits. As oily fish is a major dietary source of omega-3 fatty acids, it is possible that low intake of fish during pregnancy may…

  13. Sunlight-Sensitive Anti-Fouling Nanostructured TiO2 coated Cu Meshes for Ultrafast Oily Water Treatment

    Science.gov (United States)

    Liu, Haoran; Raza, Aikifa; Aili, Abulimiti; Lu, Jinyou; Alghaferi, Amal; Zhang, Tiejun

    2016-05-01

    Nanostructured materials with desired wettability and optical property can play an important role in reducing the energy consumption of oily water treatment technologies. For effective oily water treatment, membrane materials with high strength, sunlight-sensitive anti-fouling, relative low fabrication cost, and controllable wettability are being explored. In the proposed oily water treatment approach, nanostructured TiO2-coated copper (TNS-Cu) meshes are used. These TNS-Cu meshes exhibit robust superhydrophilicity and underwater oleophobicity (high oil intrusion pressure) as well as excellent chemical and thermal stability (≈250 °C). They have demonstrated high separation efficiency (oil residue in the filtrate ≤21.3 ppm), remarkable filtration flux (≥400 kL h-1 m-2), and sunlight-sensitive anti-fouling properties. Both our theoretical analysis and experimental characterization have confirmed the enhanced light absorption property of TNS-Cu meshes in the visible region (40% of the solar spectrum) and consequently strong anti-fouling capability upon direct solar light illumination. With these features, the proposed approach promises great potential in treating produced oily wastewater from industry and daily life.

  14. Oily Fish Consumption Modifies the Association between CD36 rs6969989 Polymorphism and Lipid Profiles in Korean Women

    Science.gov (United States)

    Shin, Yoonjin; Kim, Yangha

    2016-01-01

    The aim of this study was to investigate the association of CD36, a class B scavenger receptor, rs6969989 polymorphism with the serum lipid profiles in Korean women, together with their modulation by oily fish consumption. Subjects were participants from the Korean Genome Epidemiology Study (KoGES), which was initiated in 2001 as a large-scale. A total of 4,210 women aged 39 to 70 were included in this study. Data were collected using self-administered questionnaires, anthropometric measurements, and blood chemical analysis. Dietary intake was analyzed using a semi-quantitative food frequency questionnaire. The minor allele frequency for rs6969989 was found in 12% of this population. Homozygotes minor G allele at the rs6868989 exhibited significantly higher high density lipoprotein cholesterol (HDL-C) concentrations (P-trend=0.043) and lower fasting glucose (P-trend=0.013) than major allele A carriers. The risk of low HDL-C was significantly lower in homozygotes for the G allele than the A allele carriers (P-trend=0.032). Gene-diet interaction effects between rs6969989 and oily fish intake were significantly associated with the risk of dyslipidemia (P-interaction= 0.004). Subjects with homozygotes minor G allele and high oily fish intake generally had a lower risk of dyslipidemia than did those with major allele homozygotes and low oily fish intake. These findings supported that oily fish consumption may modulate the contributions of CD36 rs6969989 on genetic predisposition to the risk of dyslipidemia. PMID:27752496

  15. Il Sistema Costituzionale Italiano

    OpenAIRE

    2015-01-01

    Conferencia sobre el sistema constitucional italiano,centrándose en la forma de gobierno de Italia y sus principales instituciones. Tres fueron los perfiles en los que la ponente hizo hincapié: la relación entre el Gobierno y el Parlamento; las funciones desempeñadas por los partidos políticos en el sistema representativo italiano y las leyes electorales que a lo largo de la historia republicana del país han reglamentado el sistema electoral. I...

  16. Oily fish increases iron bioavailability of a phytate rich meal in young iron deficient women.

    Science.gov (United States)

    Navas-Carretero, Santiago; Pérez-Granados, Ana M; Sarriá, Beatriz; Carbajal, Angeles; Pedrosa, Mercedes M; Roe, Mark A; Fairweather-Tait, Susan J; Vaquero, M Pilar

    2008-02-01

    Iron deficiency is a major health problem worldwide, and is associated with diets of low iron bioavailability. Non-heme iron absorption is modulated by dietary constituents, one of which is the so-called "meat factor", present in meat, fish (oily and lean) and poultry, which is an important enhancer of iron absorption in humans. Food processing also affects iron bioavailability. To evaluate the effect of consuming sous vide cooked salmon fish on non-heme iron bioavailability from a bean meal, rich in phytate, in iron-deficient women. Randomized crossover trial in 21 young women with low iron stores (ferritin Sous vide cooked salmon fish increases iron absorption from a high phytate bean meal in humans.

  17. Potential of glycerol and soybean oil for bioremediation of weathered oily-sludge contaminated soil

    Energy Technology Data Exchange (ETDEWEB)

    Nascimento, T.C.F.; Franca, F.P. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Escola de Quimica], E-mail: fpfranca@eq.ufrj.br; Oliveira, F.J.S. [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil)

    2012-04-15

    The bioremediation of petroleum-contaminated soil was investigated on laboratory scale. This work evaluated the effect of co-substrate addition in tropical climate soil highly contaminated with oily residue. Glycerol and soybean oil were used as auxiliary co-substrates for contaminant degradation. Three different concentrations of co-substrate were tested, and the experiments were carried out over 60 days. The following parameters were monitored: humidity, pH, total heterotrophic bacteria, total fungi, total petroleum hydrocarbons (TPH), and the concentrations of benzo[a]pyrene and chrysene. The soil supplementation with renewable co-substrates improved the efficiency of the biodegradation TPH, with removals of 85% and 83% for glycerol and soybean oil, respectively, compared to a 55% removal yielded by the biodegradation process without supplementation. The use of glycerol increased Chrysene and Benzo[a]pyrene biodegradation by 50%, while soybean oil supplementation increased their removal by 36%. (author)

  18. Treatment of automotive industry oily wastewater by electrocoagulation: statistical optimization of the operational parameters.

    Science.gov (United States)

    GilPavas, Edison; Molina-Tirado, Kevin; Gómez-García, Miguel Angel

    2009-01-01

    An electrocoagulation process was used for the treatment of oily wastewater generated from an automotive industry in Medellín (Colombia). An electrochemical cell consisting of four parallel electrodes (Fe and Al) in bipolar configuration was implemented. A multifactorial experimental design was used for evaluating the influence of several parameters including: type and arrangement of electrodes, pH, and current density. Oil and grease removal was defined as the response variable for the statistical analysis. Additionally, the BOD(5), COD, and TOC were monitored during the treatment process. According to the results, at the optimum parameter values (current density = 4.3 mA/cm(2), distance between electrodes = 1.5 cm, Fe as anode, and pH = 12) it was possible to reach a c.a. 95% oils removal, COD and mineralization of 87.4% and 70.6%, respectively. A final biodegradability (BOD(5)/COD) of 0.54 was reached.

  19. Process simulation and dynamic control for marine oily wastewater treatment using UV irradiation.

    Science.gov (United States)

    Jing, Liang; Chen, Bing; Zhang, Baiyu; Li, Pu

    2015-09-15

    UV irradiation and advanced oxidation processes have been recently regarded as promising solutions in removing polycyclic aromatic hydrocarbons (PAHs) from marine oily wastewater. However, such treatment methods are generally not sufficiently understood in terms of reaction mechanisms, process simulation and process control. These deficiencies can drastically hinder their application in shipping and offshore petroleum industries which produce bilge/ballast water and produced water as the main streams of marine oily wastewater. In this study, the factorial design of experiment was carried out to investigate the degradation mechanism of a typical PAH, namely naphthalene, under UV irradiation in seawater. Based on the experimental results, a three-layer feed-forward artificial neural network simulation model was developed to simulate the treatment process and to forecast the removal performance. A simulation-based dynamic mixed integer nonlinear programming (SDMINP) approach was then proposed to intelligently control the treatment process by integrating the developed simulation model, genetic algorithm and multi-stage programming. The applicability and effectiveness of the developed approach were further tested though a case study. The experimental results showed that the influences of fluence rate and temperature on the removal of naphthalene were greater than those of salinity and initial concentration. The developed simulation model could well predict the UV-induced removal process under varying conditions. The case study suggested that the SDMINP approach, with the aid of the multi-stage control strategy, was able to significantly reduce treatment cost when comparing to the traditional single-stage process optimization. The developed approach and its concept/framework have high potential of applicability in other environmental fields where a treatment process is involved and experimentation and modeling are used for process simulation and control.

  20. Sistema de arbitraje

    OpenAIRE

    2015-01-01

    Con el propósito de garantizar la calidad de las publicaciones de la Revista Científica Virtual  Horizonte Empresarial, en el presente volumen 2 N° 2, 2015, queda estipulado el siguiente sistema de arbitraje.

  1. Treatment of oily wastewater by ultrafiltration: The effect of different operating and solution conditions

    Energy Technology Data Exchange (ETDEWEB)

    Hesampour, M

    2009-07-01

    In many industries, such as petroleum production, and the petrochemical, metal, food and cosmetics industries, wastewaters containing an emulsion of oil in water are often produced. The emulsions consist of water (up to 90%), oils (mineral, animal, vegetable and synthetic), surfactants and other contaminates. In view of its toxic nature and its deleterious effects on the surrounding environment (soil, water) such wastewater needs to be treated before release into natural water ways. Membrane-based processes have successfully been applied in industrial applications and are considered as possible candidates for the treatment of oily wastewaters. Easy operation, lower cost, and in some cases, the ability to reduce contaminants below existing pollution limits are the main advantages of these systems. The main drawback of membranes is flux decline due to fouling and concentration polarisation. The complexity of oil-containing systems demands complementary studies on issues related to the mitigation of fouling and concentration polarisation in membranebased ultrafiltration. In this thesis the effect of different operating conditions (factors) on ultrafiltration of oily water is studied. Important factors are normally correlated and, therefore, their effect should be studied simultaneously. This work uses a novel approach to study different operating conditions, like pressure, flow velocity, and temperature, and solution properties, like oil concentration (cutting oil, diesel, kerosene), pH, and salt concentration (CaCl{sub 2} and NaCl)) in the ultrafiltration of oily water, simultaneously and in a systematic way using an experimental design approach. A hypothesis is developed to describe the interaction between the oil drops, salt and the membrane surface. The optimum conditions for ultrafiltration and the contribution of each factor in the ultrafiltration of oily water are evaluated. It is found that the effect on permeate flux of the various factors studied strongly

  2. Oily fraction of Semecarpus anacardium Linn nuts involves protein kinase C activation for its pro-inflammatory response.

    Science.gov (United States)

    Tripathi, Yamini B; Pandey, Nidhi; Tripathi, Deepshikha; Tripathi, Pratibha

    2010-12-01

    The oily fraction (non polar fraction-NPF) of S. anacardium (SA) significantly increased the expression of protein kinase C-delta (PKC-delta) in macrophages in concentration dependent manner, which was similar to phorbol myristate acetate (PMA) response. Further, H-7 (1-(5-isoquinolinesulphonyl)-2-methylpiperazine), an inhibitor of PKC significantly inhibited this NPF mediated response in a concentration dependent manner. In the post treatment kinetics, H-7 showed this inhibition only up to 6 min post NPF/PMA addition, but in similar condition, quercetin, a flavone with reported antioxidant property, showed this inhibition only up to 2 min. The results clearly suggest that oily fraction of SA nuts enhances the expression of PKC protein, which may be responsible for its reported pro-inflammatory property.

  3. Soybean Lecithin Acts as both Absorption Enhancer and Oily Phase in an Insulin-loaded Emulsion System for Transmucosal Delivery

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    An insulin- loaded emulsion system (IES) was developed as a hypoglycaemic drug for transmucosal delivery. The selected formulation was a stable oil/water emulsion system. The particles in the emulsion system were distributed evenly, and the particle size ranged from 20 to 260 nm ( average size: 67.5 nm). Soybean lecithin played an important role in the emulsion system due to its abilities of acting as both absorption enhancer for insulin uptake through sublingual mucosa and oily phase for the emulsion system. The laser confocal scanning microscopic (LCSM) study showed that FITC-labelled insulin could penetrate the sublingual mucosa of rabbits,and the phase diagrams of the emulsion system suggested that soybean lecithin could take the place of oily phase to construct a stable emulsion system even if the traditional oil was absent. The applications of soybean lecithin as pharmaceutical biomaterial were extended for the further usage by present studies.

  4. Sistema detector d'incendis WSN

    OpenAIRE

    Domínguez López, Emiliano

    2012-01-01

    Sistema detector d'incendis aprofitant una xarxa de sensors sense fils (WSN) mitjançant un sistema encastat. Sistema detector de incendios aprovechando una red de sensores inalámbricos (WSN) mediante un sistema empotrado.

  5. Sistema detector d'incendis WSN

    OpenAIRE

    Domínguez López, Emiliano

    2012-01-01

    Sistema detector d'incendis aprofitant una xarxa de sensors sense fils (WSN) mitjançant un sistema encastat. Sistema detector de incendios aprovechando una red de sensores inalámbricos (WSN) mediante un sistema empotrado.

  6. Tamanho de amostra para avaliação de caracteres de cenoura em sistemas de cultivo agroecológico Sample size for evaluation of carrot traits in agroecologic cultivation systems

    Directory of Open Access Journals (Sweden)

    Giovani Olegário da Silva

    2009-06-01

    Full Text Available O correto dimensionamento de experimentos deve ser utilizado para que se possa reduzir o erro experimental e com isso, maximizar a precisão das informações obtidas. O objetivo deste trabalho foi estimar o número mínimo de famílias e de plantas por parcela para avaliação de caracteres de raiz em uma população de cenoura cultivada em sistema agroecológico. Os ensaios foram conduzidos no verão de 2006/2007 em duas propriedades com cultivo agroecológico em Brasília: Associação Mokiti Okada, que segue modelo de Agricultura Natural em Brazlândia-DF e Núcleo Rural Taguatinga, seguindo modelo de Agricultura Orgânica em Taguatinga-DF. Foram avaliadas 100 famílias de meio-irmãos de cenoura dispostas em delineamento de blocos casualizados com duas repetições e parcelas de 1 m². Foram colhidas 20 plantas competitivas por parcela e avaliadas individualmente para os caracteres comprimento de raiz, diâmetro da raiz, massa da raiz, diâmetro do xilema da raiz, relação diâmetro do xilema/diâmetro da raiz, tipo de ponta da raiz, tipo de ombro da raiz, parâmetro a* para os tecidos xilema e floema. Foi realizada análise de variância conjunta e para cada sistema, com informação entre e dentro de parcelas. Foram realizadas ainda análises de representatividade do número mínimo de famílias e de plantas para representar uma população de cenoura. Foi verificado que uma amostra de 18 plantas competitivas/parcela coletadas em ensaios com 2 repetições, bem como de 74 famílias, são suficientes para garantir uma adequada avaliação de famílias meio-irmãos de cenoura para os caracteres estudados.The correct experiment design should be used to reduce the experimental error and, with that, maximize the precision of the information obtained. The objective of this work was to estimate the minimum number of families and of plants per plot for evaluation of root traits in a carrot population cultivated in agroecologic systems. The

  7. SISTEMA NACIONAL DE CONTABILIDAD

    OpenAIRE

    Yacsahuache Pasapera, Hernán; Facultad de Ciencias Contables, Universidad Nacional Mayor de San Marcos

    2014-01-01

    La Ley 24680 o ley del Sistema Nacional de Contabilidad determina las funciones, objetivos y estructura de los organismos y Órganos componentes del SNC, instituido por el artículo 145° de la Constitución Política del Perú de 1979, los mecanismos de coordinación de la contabilidad, así como las relaciones con otros organismos del sector público y del sector privado. Determina, además, que es un sistema autónomo, administrativa y funcionalmente, tiene a su cargo la investigación y función de l...

  8. El Sistema inspirerede projekter

    DEFF Research Database (Denmark)

    Holst, Finn; Chemi, Tatiana

    Rapporten er resultat af pilotprojektet ”Forundersøgelse El Sistema DK” gennemført af Ph.D. Finn Holst (DPU, Aarhus Universitet) og Ph.D. Tatiana Chemi (Aalborg Universitet) i 2015. I rapporten indgår desuden bidrag fra Sofie Holm, Sara Fink Søndergaard og Stine Møgelbjerg Johansen. Pilotprojektet...... er gennemført for DMKLs El Sistema-udvalg med støtte fra Statens Kunstfond, Projektstøtteudvalget for Musik....

  9. Sistema Internacional de Medidas

    OpenAIRE

    2015-01-01

    La adopcion del Sistema Intemacional de unidades hace necesario que los profesores y maestros lo conozcan y sepan usarlo.La enseiianza de las ciencias, y en especial la didactica de la fisica, se simplifica con Ia adopcion de un sistema unico de unidades. El estudio de Ia mecanica se facilita notablemente y en los tópicos -de calor solo es necesario presentar el julio en vez de Ia caloria y adoptar la escala Kelvin de temperaturas, en tanto que la óptica no requiere de ningin cambio.

  10. Envejecimiento del sistema cardiovascular

    OpenAIRE

    2005-01-01

    Las principales características del envejecimiento del sistema cardiovascular reflejan cambios anatómicos y estructurales a nivel de la pared de los vasos, la relajación miocárdica, el llenado ventricular y la respuesta a las catecolaminas . Muchos de los cambios funcionales asociados con la edad están relacionados con estos fenómenos. Esta revisión describe los cambios relacionados con el envejecimiento a nivel estructural y funcional del sistema cardiovascular, sus posibles factores etiológ...

  11. SISTEMA NACIONAL DE CONTABILIDAD

    OpenAIRE

    Yacsahuache Pasapera, Hernán; Facultad de Ciencias Contables, Universidad Nacional Mayor de San Marcos

    2014-01-01

    La Ley 24680 o ley del Sistema Nacional de Contabilidad determina las funciones, objetivos y estructura de los organismos y Órganos componentes del SNC, instituido por el artículo 145° de la Constitución Política del Perú de 1979, los mecanismos de coordinación de la contabilidad, así como las relaciones con otros organismos del sector público y del sector privado. Determina, además, que es un sistema autónomo, administrativa y funcionalmente, tiene a su cargo la investigación y función de l...

  12. Bacterial protease triggered release of biocides from microspheres with an oily core.

    Science.gov (United States)

    Craig, Marina; Amiri, Mona; Holmberg, Krister

    2015-03-01

    This study deals with controlled release of drugs to a Staphylococcus aureus infected site from microspheres with an oily core and a polymeric shell. The intended use of the microspheres is for chronic wounds and the microspheres may be administered in the form of a wash liquid or incorporated in a gel. Chronic wounds often carry infection, and the use of microspheres with drug release triggered by the bacterial infection is therefore of interest. A lipophilic drug or a model of the drug was dissolved in an oil and the oil phase was dispersed into an o/w emulsion. A nanofilm shell was then assembled around the oil droplets with the layer-by-layer technique using the two biodegradable polypeptides anionic poly-L-glutamic acid (PLGA) and cationic poly-L-lysine (PLL). Since S. aureus exudes proteases such as glutamyl endopeptidase (V8) during colonization and infection, its substrate specificity was key when assembling the nanofilm. Since V8 is known to be substrate specific to the Glu-X bond, PLGA was chosen as the terminating layer of the nanofilm. Crosslinking the nanofilm after assembly lead to increased stability of the microspheres. It was shown that in a non-infectious environment, i.e. when a human wound enzyme, HNE (human neutrophile elastase), was present, the microspheres remained intact. The staphylococcal protease V8, on the other hand, readily catalyzed degradation of the microspheres, thus releasing the drug when triggered by the infectious environment.

  13. Oil recovery from refinery oily sludge via ultrasound and freeze/thaw.

    Science.gov (United States)

    Zhang, Ju; Li, Jianbing; Thring, Ronald W; Hu, Xuan; Song, Xinyuan

    2012-02-15

    The effective disposal of oily sludge generated from the petroleum industry has received increasing concerns, and oil recovery from such waste was considered as one feasible option. In this study, three different approaches for oil recovery were investigated, including ultrasonic treatment alone, freeze/thaw alone and combined ultrasonic and freeze/thaw treatment. The results revealed that the combined process could achieve satisfactory performance by considering the oil recovery rate and the total petroleum hydrocarbon (TPH) concentrations in the recovered oil and wastewater. The individual impacts of five different factors on the combined process were further examined, including ultrasonic power, ultrasonic treatment duration, sludge/water ratio in the slurry, as well as bio-surfactant (rhamnolipids) and salt (NaCl) concentrations. An oil recovery rate of up to 80.0% was observed with an ultrasonic power of 66 W and an ultrasonic treatment duration of 10 min when the sludge/water ratio was 1:2 without the addition of bio-surfactant and salt. The examination of individual factors revealed that the addition of low concentration of rhamnolipids (recovery from the combined treatment process. The experimental results also indicated that ultrasound and freeze/thaw could promote the efficiency of each other, and the main mechanism of oil recovery enhancement using ultrasound was through enhanced desorption of petroleum hydrocarbons (PHCs) from solid particles. Copyright © 2011 Elsevier B.V. All rights reserved.

  14. Forward osmosis for oily wastewater reclamation: Multi-charged oxalic acid complexes as draw solutes

    KAUST Repository

    Ge, Qingchun

    2017-06-11

    Forward osmosis (FO) has demonstrated its merits in hybrid FO seawater desalination. However, FO may have a potential for other applications if suitable draw solutes are available. In this study, a series of novel draw solutes based on oxalic acid (OA)-transitional metal complexes are presented. Influential factors of FO performance have been systematically investigated by varying the transitional metals, cations of the complex draw solutes as well as the experimental conditions. Compared to NaCl and other recently synthesized draw solutes, the OA complexes show superior FO performance in terms of high water fluxes up to 27.5 and 89.1 LMH under the respective FO and PRO (pressure retarded osmosis) modes, both with negligible reverse solute fluxes. The features of octahedral geometry, abundant hydrophilic groups and ionic species are crucial for the OA complexes as appropriate draw solutes with satisfactory FO performance. Among the synthesized OA complexes, the ammonium salt of chromic complex (NH4-Cr-OA) outperforms others due to the presence of more ionic species in its complex system. NH4-Cr-OA also performs better than the typical NaCl draw solute in FO oily wastewater treatment with higher water recovery and negligible reverse fluxes. Dilute solutions of OA complexes have been reconcentrated through membrane distillation (MD) and reused to new round of FO processes. The OA complexes have demonstrated their suitability and superiority as a novel class of draw solutes for the FO process in this study.

  15. El Sistema's Open Secrets

    Science.gov (United States)

    Booth, Eric

    2011-01-01

    In this article, the author talks about Venezuela's national youth orchestra program called El Sistema whose attributes offer a direct challenge to traditional Western music practices. As U.S. classical music--and all "high arts"--struggle to find relevance to more than the small "arts club" percentage of the U.S. populace, El…

  16. El Sistema's Open Secrets

    Science.gov (United States)

    Booth, Eric

    2011-01-01

    In this article, the author talks about Venezuela's national youth orchestra program called El Sistema whose attributes offer a direct challenge to traditional Western music practices. As U.S. classical music--and all "high arts"--struggle to find relevance to more than the small "arts club" percentage of the U.S. populace, El…

  17. sistema Web con JSP

    Directory of Open Access Journals (Sweden)

    César Viloria Núñez

    2014-01-01

    Full Text Available Este artículo presenta el desarrollo de un sistema de información que permite la adquisición y la administración de información relacionada con los signos vitales como la presión arterial, la frecuencia cardiaca y respiratoria, y la saturación de oxígeno en la sangre de un paciente. La implementación del sistema se basa en una solución Web, permitiendo así que médicos especialistas puedan monitorear a sus pacientes desde cualquier punto conectado a la red en tiempo real y, al mismo tiempo, dar indicaciones críticas al personal médico que se encuentra en el lugar con el paciente.

  18. Reducing COD level on oily effluent by utilizing biosurfactant-producing bacteria

    Directory of Open Access Journals (Sweden)

    Daniela Franco Carvalho Jacobucci

    2009-08-01

    Full Text Available Two bacteria isolated from crude oil contaminated soil, Pantoea agglomerans and Planococcus citreus, produced biosurfactants utilizing 1.5% of kerosene and olive oil as the sole carbon sources, respectively. The bacteria and the biosurfactants produced were introduced to oily effluent, arising from margarine and soap industry. Emulsification activities were determined by increases in the absorbance of the oil-in-water emulsions at 610 nm, whereas the water-in-oil emulsions were expressed as the height (cm of the emulsion layers formed. The 72 h incubation experiment resulted in a COD (Chemical Oxygen Demand reduction of 76% with Planococcus citreus strain and 70% with Pantoea agglomerans.The COD reduction with bacterial biosurfactants was over 50% in 24 h of incubation. The COD reduction showed that these strains and the surfactants produced could be used in bioremediation processes.Duas bactérias isoladas de solo contaminado com derivados de petróleo, Pantoea agglomerans e Planococcus citreus, produzem biosurfactantes utilizando respectivamente 1.5% de querosene e óleo de oliva como únicas fontes de carbono. As bactérias e os biosurfactantes produzidos foram adicionados a um efluente oleoso obtido de uma indústria nacional de sabão e margarina. As atividades de emulsificação foram determinadas pelo aumento da absorbância das emulsões óleo em água a 610 nm, enquanto que as emulsões do tipo água em óleo foram expressas em centímetros, pela altura do halo de espumas formado. A redução da demanda química de oxigênio (COD mostra que as linhagens e os biosurfactantes produzidos podem ser utilizados em processos de biorremediação.

  19. Dewatering and low-temperature pyrolysis of oily sludge in the presence of various agricultural biomasses.

    Science.gov (United States)

    Zhao, Song; Zhou, Xiehong; Wang, Chuanyi; Jia, Hanzhong

    2017-08-24

    Pyrolysis is potentially an effective treatment of waste oil residues for recovery of petroleum hydrocarbons, and the addition of biomass is expected to improve its dewatering and pyrolysis behavior. In this study, the dewatering and low-temperature co-pyrolysis of oil-containing sludge in the presence of various agricultural biomasses, such as rice husk, walnut shell, sawdust, and apricot shell, were explored. As a result, the water content gradually decreases with the increase of biomass addition within 0-1.0 wt % in original oily sludge. Comparatively, the dewatering efficiency of sludge in the presence of four types of biomasses follows the order of apricot shell > walnut shell > rice husk > sawdust. On the other hand, rice husk and sawdust are relatively more efficient in the recovery of petroleum hydrocarbons compared with walnut shell and apricot shell. The recovery efficiency generally increased with the increase in the biomass content in the range of 0-0.2 wt %, then exhibited a gradually decreasing trend with the increase in the biomass content from 0.2 to 1.0 wt %. The results suggest that optimum amount of biomass plays an important role in the recovery efficiency. In addition, the addition of biomass (such as rice husk) also promotes the formation of CxHy and CO, increasing the calorific value of pyrolysis residue, and controlled the pollution components of the exhaust gas discharged from residue incineration. The present work implies that biomass as addictive holds great potential in the industrial dewatering and pyrolysis of oil-containing sludge.

  20. Treatment of oily water by flotation; Tratamiento de aguas oleosas por flotacion

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz O, H.B

    2002-07-01

    The operation of the nuclear power plants such as Laguna Verde (CLV) with nuclear reactors of the boiling water type (BWR) produce radioactive waste solids, liquids and gaseous which require of a special treatment in their operation and arrangement. Such is the case of the liquid wastes from CLV which are a mixture of water and synthetic oils coming from leaks and spilling by pressure of maintenance of electro-mechanical equipment associated to the performance of the nuclear power plant. This mixture of water and spent oils is pretreated by means of sedimentation, centrifugation and evaporation. However the realized efforts by the CLV, the spent oil obtained from the pretreatment contains concentrations of radioactive material higher than the tolerance limits established in the normative in force in radiological safety (0.37 Bq m L{sup -1} for {sup 60} Co and {sup 54} Mn). In this context it was necessary to design an efficient treatment system and economically profitable which separates the oil, the heavy metals and the leftovers of radioactive material that could be present in water, with the purpose of fulfil with the Mexican Official Standards corresponding for its unload or even it can reuse it in the wash process of treated oil. The treatment system of oily water waste consists of: a) Coagulation-flocculation, b) Flotation system with modified air dissolved (DAFm). The proposed flotation process allows to reach a higher separation efficiencies of: Concentration of greases and oils: 94.11 %; Turbidity: 98.6 %; {sup 60} Co: 82.3 % ; Co: 94.8 % and Cr: 99.9 % (Author)

  1. SISTEMA DE MONITORAMENTO AUTOMATIZADO

    Directory of Open Access Journals (Sweden)

    Raiane viana Souza

    2016-11-01

    Full Text Available Atualmente existe uma grande necessidade de ter sistemas que auxiliem no monitoramento de ambientes, por exemplo: uma residência; permitindo assim que o usuário possa controlar e ter acesso a tudo que acontece quando o mesmo estiver ausente. Este projeto propõe realizar o desenvolvimento de um sistema de monitoramento automatizado, cujo objetivo é identificar a presença de pessoas e capturar temperaturas de um ambiente. O sistema é composto por um microcontrolador Arduíno, no qual estará acoplado: uma Webcam, sensores de presença e temperatura e um módulo wifi, que possibilitará o envio dos dados capturados ao servidor web. No protótipo desenvolvido foram implantados todos os recursos definidos com base nos requisitos do usuário, dentre os quais podem-se destacar: permitir detectar a presença de pessoas em ambiente, capturar imagens, capturar temperatura em um intervalo de tempo específico e enviar todos os dados para o servidor; permitir que o usuário visualize as informações capturadas através de um site; gerar relatórios e gráficos com as informações capturadas e permitir que o usuário exporte as informações em formato de arquivo.

  2. 含油污泥处理及资源化利用%Treatment and resource utilization of oily sludge

    Institute of Scientific and Technical Information of China (English)

    张雷; 李琳琳; 苗月

    2012-01-01

    Oily sludge was mainly produced in the course of petroleum exploration and exploitation as well as the productive process of petroleum chemical industry, which could do great harm to the production and environment or be used as a valuable secondary resource. The main techniques for oily sludge treatment used in China and abroad such as: quality adjustment-mechanical dewatering, solvent extraction, high temperature cracking, biological treatment and so on were introduced. The sludge reduction and harmlessness were realized; and the resources recovery and utilization also could be realized with the comprehensive utilization technique. It was pointed out that, resource utilization would be the dominant technique for oily sludge treatment in the future.%含油污泥主要由石油勘探开发和石油化工行业产生,对生产和生态环境危害极大,但同时又是一种宝贵的二次资源.介绍了国内外含油污泥的主要处理技术,包括调质-机械脱水、溶剂萃取、高温裂解、生物处理等,及由上述技术实现的含油污泥的减量化和无害化;简述了采用综合利用处理技术进一步实现资源的回收利用,指出资源化利用技术将成为未来油泥处理的主导方向.

  3. SISTEMA PROCESSUAL MISTO (OU MÍTICO SISTEMA PROCESSUAL)

    OpenAIRE

    Cani, Luiz Eduardo

    2014-01-01

    Este artigo demonstra que a existência de um sistema processual misto não passa de um engodo. Para tanto, são abordadas as estruturas dos sistemas processuais acusatório e inquisitório. O método de abordagem é o indutivo e o de procedimento é o comparativo. A metodologia empregada é a de análise e de cruzamento da literatura acerca do tema, apresentando-se as razões porque o chamado sistema processual misto não é, na verdade, um sistema.

  4. Sistemas Silvipastoris Silvipastoral Systems

    Directory of Open Access Journals (Sweden)

    Fernando Salgado Bernardino

    2010-02-01

    Full Text Available

    Apesar das pesquisas com sistemas silvipastoris terem sido iniciadas no final da década de 1970, as informações geradas até hoje não são em grande número. As vantagens advindas de um sistema silvipastoril são inúmeras e devidamente reconhecidas. Pelo fato de ser uma técnica de uso da terra capaz de recuperar ecossistemas alterados pelo mau manejo, estes sistemas, pela integração de atividades agrícolas, pecuárias e silviculturais, passam a representar uma tecnologia que confere maior sustentabilidade que os sistemas tradicionais, nos quais os monocultivos são predominantes. Nos últimos anos, instituições de ensino, pesquisa e extensão do País têm se voltado para o desenvolvimento de tais sistemas. O governo de Minas Gerais, por meio de sua Secretaria de Estado de Agricultura e de órgãos vinculados, vem promovendo a condução de modelos agrossilvipastoris num processo integrado de ocupação do solo, denominado lavoura-pecuária-silvicultura. Apesar dos grandes avanços no conhecimento de culturas anuais e dos componentes arbóreos, principalmente o eucalipto, e de gramíneas forrageiras tolerantes à diminuição da intensidade luminosa, ainda é necessário se comnhecer melhor o manejo do sub-bosque sob os efeitos do pastejo.

     

    doi: 10.4336/2009.pfb.60.77

    Although researches related to silvopastoral systems have been initiated many years ago in Brazil, there are few informations generated until now. The advantages from a silvopastoral system are inumerous and well recognized. By the fact of being a technique of land using capable of recovering several disturbed ecosystems, the silvopastoral systems by the integration of agricultural, cattle, and silvicultural activities represent a technology that can achieve higher sustainability than the traditional systems as the monocultures. Today, research centers in Brazil dedicate great attention to agrossilvopastoral systems. The government of Minas Gerais

  5. 无机陶瓷膜在含油废水处理中的应用%Application of Inorganic Ceramic Membrane in Treatment of Oily Wastewater

    Institute of Scientific and Technical Information of China (English)

    张庆国

    2013-01-01

    The research and development of inorganic ceramic membrane were introduced, and preparation methods of inorganic ceramic membrane were discussed as well as their application in treatment of oily waste water,such as emulsion wastewater, oil field produced water, cleaning fluid, food industry oily wastewater and petrochemical oily wastewater.%  介绍无机陶瓷膜的研究发展概况,并简要介绍无机陶瓷膜的制备方法及其在含油废水(乳化液废水、油田采出水、清洗液、食品工业含油废水和石油化工含油废水)处理中的应用。

  6. Assesment of the behavior of chitosan emulsions in the treatment of oily waters; Avaliacao do comportamento de emulsoes de quitosana no tratamento de aguas oleosas

    Energy Technology Data Exchange (ETDEWEB)

    Grem, Izabel Cristina S.; Almeida, Sarah M.; Queiros, Yure G.C.; Mansur, Claudia R.E. [Universidade Federal do Rio de Janeiro/ Instituto de Macromoleculas/Laboratorio de Macromoleculas e Coloides na Industria de Petroleo, Rio de Janeiro, RJ (Brazil)], E-mails: celias@ima.ufrj.br, izabelgrem@ima.ufrj.br, yuregomes@ima.ufrj.br

    2011-07-01

    Chitosan, due to the presence of amino and hydroxyl groups in its structure has been applied in different fields, but the use of chitosan in the treatment of oily waters is still a subject rarely addressed. Thus, emulsions of chitosan solutions in hexane or water were prepared and their behavior were evaluated in reducing the oil content in synthetic oily waters. Experimental results obtained in this initial study showed that the emulsions prepared were effective in oil removal of treated water. Moreover, we observed that this efficiency seems to be related to the droplets size distribution of chitosan solution dispersed in the nanoemulsions. (author)

  7. 含油污泥石油类物质两步法回收工艺试验研究%Study on Two-Step Process of Oil Material Recovery from Oily Sludge

    Institute of Scientific and Technical Information of China (English)

    滕青; 孙根行; 刘若阳; 路建萍

    2013-01-01

    针对某采油厂的含油污泥样品,采用热破胶相分离和气浮分离两步法回收石油类物质的工艺条件进行研究,获取了系统设计及实际生产所需的工艺参数.具体如下,将含油污泥用3倍质量水稀释后的混合液加热至80℃,调pH值6左右,加入占混合液质量分数0.4%的自制破胶剂,在缓慢搅拌下进行大约15~20 min的热破胶相分离;石油类物质分离后的泥水混合液常温下再进行5~10 min气浮除油,除油后的泥水混合物脱水得到泥饼含油率可达到1%以下;分离液循环回用于新的含油污泥稀释,分离效果良好.含油污泥除油脱水后泥饼土样种植三叶草,种子的萌发及枝叶生长正常.%In this paper, the quick hot breaking-emulsion and floatation separation process of oil material recovery from oily sludge obtained from an oil field was probed to obtain the essential parameters in the relevant engineering design or practices. The optimal process was as follows. Firstly, the mixture containing 25% oily sludge and 75% water was adjusted to a pH of 6, following by adding about 0.4% emulsion breaking agent, and then heating to 80℃ under stirring slowly for 15 ~ 20 minutes. Secondly, at the room temperature, the major-oil-removed mixture was further treated by means of flotation for about 10 minutes in order to separate the residual oil. The oil content of the mud cake formed by the centrifugal separation of the last mixture was less than 1%. And the result that centrifugal separation mixture liquid for the next oily sludge treatment was great. Furthermore, the test result of planting clover on the soil sample composed of the dry mud cake and some seedbed soil showed that the seed germination and growth were normal.

  8. Autochthonous bioaugmentation with environmental samples rich in hydrocarbonoclastic bacteria for bench-scale bioremediation of oily seawater and desert soil.

    Science.gov (United States)

    Ali, Nedaa; Dashti, Narjes; Salamah, Samar; Al-Awadhi, Husain; Sorkhoh, Naser; Radwan, Samir

    2016-05-01

    Oil-contaminated seawater and desert soil batches were bioaugmented with suspensions of pea (Pisum sativum) rhizosphere and soil with long history of oil pollution. Oil consumption was measured by gas-liquid chromatography. Hydrocarbonoclastic bacteria in the bioremediation batches were counted using a mineral medium with oil vapor as a sole carbon source and characterized by their 16S ribosomal RNA (rRNA)-gene sequences. Most of the oil was consumed during the first 2-4 months, and the oil-removal rate decreased or ceased thereafter due to nutrient and oxygen depletion. Supplying the batches with NaNO3 (nitrogen fertilization) at a late phase of bioremediation resulted in reenhanced oil consumption and bacterial growth. In the seawater batches bioaugmented with rhizospheric suspension, the autochthonous rhizospheric bacterial species Microbacterium oxidans and Rhodococcus spp. were established and contributed to oil-removal. The rhizosphere-bioaugmented soil batches selectively favored Arthrobacter nitroguajacolicus, Caulobacter segnis, and Ensifer adherens. In seawater batches bioaugmented with long-contaminated soil, the predominant oil-removing bacterium was the marine species Marinobacter hydrocarbonoclasticus. In soil batches on the other hand, the autochthonous inhabitants of the long-contaminated soil, Pseudomonas and Massilia species were established and contributed to oil removal. It was concluded that the use of rhizospheric bacteria for inoculating seawater and desert soil and of bacteria in long-contaminated soil for inoculating desert soil follows the concept of "autochthonous bioaugmentation." Inoculating seawater with bacteria in long-contaminated soil, on the other hand, merits the designation "allochthonous bioaugmentation."

  9. Sistema psiconeuroendocrino y envejecimiento

    OpenAIRE

    Antón Alvarez, X.; Franco, Andrés; Cacabelos, Ramón

    1990-01-01

    Este trabajo expone los efectos del envejecimiento sobre los distintos ejes del sistema neuroendocrino. El envejecimiento provoca cambios dramáticos en la mayor parte de ellos. Algunas de estas alteraciones van asociadas a los cambios conductuales y al rendimiento mental propios del envejecimiento normal y patológico. El mejor conocimiento del envejecimiento neuroendocrino permitirá en su día emplear fármacos y técnicas derivadas de la neurobiología y la genética molecular en ...

  10. Sistemas constructivos industrializados

    Directory of Open Access Journals (Sweden)

    del Águila, Alfonso

    1996-12-01

    Full Text Available The present article summarizes the main points discussed in three Innovator Buildings Systems sessions, which are about different subjects of Industrialized Building. The first part is about the topic of concrete panels, applied to building flats basically. It is given a historical summary and the general concepts, ending with "INDAGSA BUILDING SYSTEM", which is running several promotions with in Madrid. In the second part it is developed the subject of building with boxes, beginning with general points which are extended to the concept of box, its classification, its historical aspects and its applications. It is continues with a description of the "SET HOME SYSTEM" of boxes of concrete, which is dedicated to industrialization of social housing services and equipments. This part ends with the French system "TRANSLOKO" of big light boxes. Lately, it has made a building for laboratories in Madrid. The last part is dedicated to a new subject in Interior Building, which is the Dry Floor, being detailedly described the "PLADUR" point of view about this.

    El presente artículo resume lo tratado en tres jornadas de Sistemas Constructivos Innovadores, relativos a diversos temas de Construcción Industrializada. En la primera parte se trata el tema de los paneles de hormigón aplicados a la edificación, principalmente a viviendas. Se da una síntesis histórica y esquemática de conceptos generales, para terminar con una descripción del Sistema Constructivo INDAGSA que están realizando numerosas promociones en Madrid. La segunda parte, desarrolla el tema de la construcción con módulos tridimensionales, comenzando por unas consideraciones generales que abarcan el concepto de módulo tridimensional, su clasificación, aspectos históricos y campos de aplicación. Se sigue con una descripción del Sistema SET HOME, de módulos tridimensionales de hormigón, dedicado a la industrialización de servicios e instalaciones en vivienda social

  11. El Sistema Penitenciario Mexicano

    OpenAIRE

    Azaola, Elena; Bergman, Marcelo

    2003-01-01

    Este trabajo describe los rasgos y los problemas que caracterizan al sistema penitenciario mexicano y efectúa un análisis del papel que desempeña dentro del conjunto de las instituciones que tienen por objeto combatir la criminalidad. Se abordan los cambios en la actividad delictiva que han tenido lugar en el país durante la última década y las acciones que llevan a cabo las instituciones de seguridad y justicia para contenerla. Se incluyen los principales resultados y conclusiones de una enc...

  12. Los nudos del sistema

    OpenAIRE

    2000-01-01

    Pieza central del antiguo régimen; pacto, acuerdo o trato con algunos actores decisivos del sistema político susceptible de ser revisado; forma cultural de relaciones de poder o de intercambio; pirámide de organizaciones o estructura sectorial: ¿qué tan invisible sigue siendo, qué tan montada sigue estando la pirámide del corporativismo mexicano antes y después del 2 de julio de 2000? Este fenómeno constituye el eje central de las reflexiones del presente ensayo. En torno al mismo, se pres...

  13. Preparation and characterization of a powder containing an oily liquid drug with Eudragit EPO or L100 copolymer.

    Science.gov (United States)

    Fujii, Makiko; Kawakami, Ayari; Saito, Asumi; Tuchiya, Haruna; Koizumi, Naoya; Watanabe, Yoshiteru

    2016-12-01

    Oily liquid drugs are not convenient for oral administration. We developed a powder containing clofibrate (CF), a model of an oily drug, using aminoalkyl methacrylate copolymer (EPO) or methacrylic acid copolymer (L100). CF or a mixture of CF and soybean oil was emulsified with EPO or L100 aqueous solution. Using a high-pressure homogenizer, a stable emulsion was obtained, and a powder was then obtained by lyophilization of the emulsion. The content of CF in the powder depended on the formulation, with the highest contents being 24.6% and 27.1% for EPO and L100, respectively. The incorporation ratio of CF was higher for L100 than for EPO. The powder using EPO was sticky because of leaked CF and the low glass transition temperature of EPO. The powder using L100 was a typical powder obtained by lyophilization. The leakage of CF from the powder was EPO powder. The dissolution of CF from powder using EPO was fast, regardless of the pH of the medium, but the powder using L100 showed enteric-soluble characteristics, indicating that CF is well incorporated in L100.

  14. Controlabilidad de Sistemas Bilineales en el Plano

    OpenAIRE

    Laura Guarachi, Leonardo Ramiro

    2012-01-01

    El objeto principal de este trabajo son los sistemas de ecuaciones diferenciales que dependen de un parámetro u, control del sistema, tales sistemas se llaman sistemas de ecuaciones diferenciales controlables, los cuales, en general, describen procesos dinámicos de fenómenos físicos. Estos procesos se describen mediante sistemas de ecuaciones diferenciales ordinarios (EDO), ecuaciones en diferencias o a través de ecuaciones derivadas parciales. Una clase de sistemas de mucha im...

  15. Sistema seguidor solar microcontrolado

    Directory of Open Access Journals (Sweden)

    Daiane Maria Mendes Duarte

    2015-12-01

    Full Text Available A demanda de energia elétrica é cada vez maior devido ao grande crescimento da população e do novo estilo de vida adotado pela sociedade moderna, cada vez mais industrializada. Nesse sentido, o consumo de energia vem apresentando um crescimento acelerado. Concomitantemente, a sociedade se movimenta no sentido de se conscientizar das alterações ocasionadas na natureza, e, assim, surge a necessidade de novos meios de geração de energia, menos impactantes ao meio ambiente, denominadas energias renováveis. Este artigo vem apresentar um sistema seguidor solar microcontrolado, que possibilita uma maior captação de energia em placas solares, pois as posiciona sempre com sua face voltada para o sol. O sistema de controle é baseado nas equações matemáticas cujos resultados são as posições do sol num dado dia e em uma dada hora. Estas coordenadas são calculadas e resultam no deslocamento da célula fotovoltaica por meio de um motor.

  16. Simulation study of free-energy barriers in the wetting transition of an oily fluid on a rough surface with reentrant geometry.

    Science.gov (United States)

    Savoy, Elizabeth S; Escobedo, Fernando A

    2012-11-20

    When in contact with a rough solid surface, fluids with low surface tension, such as oils and alkanes, have their lowest free energy in the fully wetted state. For applications where nonwetting by these phillic fluids is desired, some barrier must be introduced to maintain the nonwetted composite state. One way to create this free-energy barrier is to fabricate roughness with reentrant geometry, but the question remains as to whether the free-energy barrier is sufficiently high to prevent wetting. Our goal is to quantify the free-energy landscape for the wetting transition of an oily fluid on a surface of nails and identify significant surface features and conditions that maximize the wetting free-energy barrier (ΔGfwd*). This is a departure from most work on wetting, which focuses on the equilibrium composite and wetted states. We use boxed molecular dynamics (BXD) (Glowacki, D. R.; Paci, E.; Shalashilin, D. V. J. Phys. Chem. B2009, 113, 16603-16611) with a modified control scheme to evaluate both the thermodynamics and kinetics of the transition over a range of surface affinities (chemistry). We find that the reentrant geometry of the nails does create a free-energy barrier to transition for phillic chemistry whereas a corresponding system on straight posts wets spontaneously and, that doubling the nail height more than doubles ΔGfwd*. For neutral to phillic chemistry, the dewetting free-energy barrier is at least an order of magnitude higher than that for wetting, indicating an essentially irreversible wetting transition. Transition rates from BXD simulations and the associated trends agree well with those in our previous study that used forward flux sampling to compute transition rates for similar systems.

  17. Sistemas hamiltonianos ressonantes.

    OpenAIRE

    Marisa Atsuko Nitto

    1999-01-01

    Será analisado, neste trabalho, o problema de ressonância existente entre os corpos celestes, cujos períodos orbitais são comensuráveis na razão p:q, onde p e q são números inteiros positivos. O corpo central será considerado achatado e as excentricidades e inclinações serão quantidades pequenas e não-nulas. O sistema Hamiltoniano ressonante obtido abrange muitos casos que podem ocorrer em problemas de Mecânica Celeste.A análise do problema será feita considerando três classes particulares de...

  18. Sistema Presidencial Mexicano"

    Directory of Open Access Journals (Sweden)

    David Pantoja Morán

    2005-01-01

    Full Text Available En este artículo, el autor aborda el origen doctrinal de las dimensiones institucionales y constitucionales del sistema presidencial-constitucional mexicano para tratar de encontrar ahí los posibles orígenes o explicaciones del éxito o fracaso de este tipo de régimen político. Para ello, se recupera la relevancia y significado de la constitución de 1824 para la vida nacional —desde entonces hasta nuestros días— a fin de comprender muchos de los orígenes de los aciertos y de los errores en el diseño de nuestra constitución vigente así como de la forma presidencial de gobierno, a saber, el principio de legitimidad dual y el de la rigidez o separación rígida de los Poderes.

  19. 复配分子膜剂处理油泥%Application of mixed molecular deposition film reagent for washing process of oily sludge

    Institute of Scientific and Technical Information of China (English)

    张智芳; 蔡永宽; 杜芳艳; 卜虎; 张美娟

    2011-01-01

    In order to purify the oily sludge and recover the oil, the molecular deposition (MD) film reagents were synthesized using epoxy chloropropane and organic amine as monomer. The MD and the mixed MD reagents were used to wash the oily sludge using chemical heat washing process. The surface tension of the MD reagent, and the relationship between the surface tension and the oil washing efficiency were studied. The results indicated that the mixed MD reagent exhibited more efficient than the MD reagent for washing oily sludge. The residual oil content was 0.4% from oily sludge with 42% oil washed by mixed MD reagent compounded by different MD reagents with equal mass ratio. The mechanism of thermochemical washing oily sludge was supposed.%为了实现净化油泥和回收石油资源,以环氧氯丙烷和有机胺为原料,制备系列分子膜剂和分子膜复配剂,将其用于落地油泥的清洗.测定分子膜剂及其分子膜复配剂的表面张力,研究表面张力与洗油效果的关系.结果表明,分子膜剂及其分子膜复配剂对落地油泥的分离均有一定效果,分子膜复配剂的效果优于单一膜剂,几种分子膜剂以等质量比例进行复配时,洗油效果较好,残油率最低,可将含油率为42%的落地油泥洗至残油率为0.4%.推测了分子膜剂热化学清洗油泥的机理.

  20. La estructura del sistema hegeliano

    OpenAIRE

    Léonard, André; Universidad de Lovaina

    2014-01-01

    Como lo expresa su título, este artículo no pretende exponer el contenido del sistema hegeliano sino el esquema del pensamiento que es inherente a la filosofía hegeliana y que aparece invariable, bajo modos distintos, en cada una de las diferentes exposiciones que hace Hegel de su sistema. El autor toma como base para su trabajo la exposición del sistema hegeliano que aparece en la última edición de la Enciclopedia de las Ciencias Filosóficas (1830). Apoyado en la teoría hegeliana del silogis...

  1. Sistema de control de riego

    OpenAIRE

    Sáez González, Javier

    2016-01-01

    Programación de un sistema capaz de controlar un sistema de riego mediante el microcontrolador Arduino. Dicho sistema se ha programado en la plataforma Simulink y se han llevado a cabo simulaciones del mismo para confirmar su correcto funcionamiento. Las simulaciones realizadas se basan en datos obtenidos de informes meteorológicos diarios que nos dan una idea de las posibles necesidades de riego en diferentes regiones de España. Realización de un estudio de diversos factores que influyen en ...

  2. Development of a High Performance PES Ultrafiltration Hollow Fiber Membrane for Oily Wastewater Treatment Using Response Surface Methodology

    Directory of Open Access Journals (Sweden)

    Noor Adila Aluwi Shakir

    2015-12-01

    Full Text Available This study attempts to optimize the spinning process used for fabricating hollow fiber membranes using the response surface methodology (RSM. The spinning factors considered for the experimental design are the dope extrusion rate (DER, air gap length (AGL, coagulation bath temperature (CBT, bore fluid ratio (BFR, and post-treatment time (PT whilst the response investigated is rejection. The optimal spinning conditions promising the high rejection performance of polyethersulfone (PES ultrafiltration hollow fiber membranes for oily wastewater treatment are at the dope extrusion rate of 2.13 cm3/min, air gap length of 0 cm, coagulation bath temperature of 30 °C, and bore fluid ratio (NMP/H2O of 0.01/99.99 wt %. This study will ultimately enable the membrane fabricators to produce high-performance membranes that contribute towards the availability of a more sustainable water supply system.

  3. Data on biodegradation of total petroleum hydrocarbons using co-composting of cow manure/oily drill wastes

    Directory of Open Access Journals (Sweden)

    Mehdi Ahmadi

    2016-12-01

    Full Text Available Oil drill cuttings are challenging wastes in oil sites especially in Khuzestan province, a major oil producing region in Iran. As co- composting is a simple and eco- friendly technique for bioremediation of oil base drill cutting, this data article designed to describe co- composting of oil base drill cutting with cow manure. The data suggest that with optimized mixture of cow manure/oily drill wastes (here, 20:1 could engender more effective treatment of the wastes (with final total petroleum hydrocarbon of 0.01 g/Kg. The data will be informative for oil drilling companies and environmental agencies for choosing it as a practical bioremediation process of soil/wastes polluted by petroleum hydrocarbons.

  4. Microbial-Influenced Corrosion of Corten Steel Compared with Carbon Steel and Stainless Steel in Oily Wastewater by Pseudomonas aeruginosa

    Science.gov (United States)

    Mansouri, Hamidreza; Alavi, Seyed Abolhasan; Fotovat, Meysam

    2015-07-01

    The microbial corrosion behavior of three important steels (carbon steel, stainless steel, and Corten steel) was investigated in semi petroleum medium. This work was done in modified nutrient broth (2 g nutrient broth in 1 L oily wastewater) in the presence of Pseudomonas aeruginosa and mixed culture (as a biotic media) and an abiotic medium for 2 weeks. The behavior of corrosion was analyzed by spectrophotometric and electrochemical methods and at the end was confirmed by scanning electron microscopy. The results show that the degree of corrosion of Corten steel in mixed culture, unlike carbon steel and stainless steel, is less than P. aeruginosa inoculated medium because some bacteria affect Corten steel less than other steels. According to the experiments, carbon steel had less resistance than Corten steel and stainless steel. Furthermore, biofilm inhibits separated particles of those steels to spread to the medium; in other words, particles get trapped between biofilm and steel.

  5. Isolation, identification and characterization of Bacillus amyloliquefaciens BZ-6, a bacterial isolate for enhancing oil recovery from oily sludge.

    Science.gov (United States)

    Liu, Wuxing; Wang, Xiaobing; Wu, Longhua; Chen, Mengfang; Tu, Chen; Luo, Yongming; Christie, Peter

    2012-06-01

    Over 100 biosurfactant-producing microorganisms were isolated from oily sludge and petroleum-contaminated soil from Shengli oil field in north China. Sixteen of the bacterial isolates produced biosurfactants and reduced the surface tension of the growth medium from 71 to BZ-6 was found to be the most efficient strain and the three phases (oil, water and sediment) were separated automatically after the sludge was treated with the culture medium of BZ-6. Based on morphological, physiological characteristics and molecular identification, isolate BZ-6 was identified as Bacillus amyloliquefaciens. The biosurfactant produced by isolate BZ-6 was purified and analyzed by high performance liquid chromatography-electrospray ionization tandem mass spectrometry. There were four ion peaks representing four different fengycin A homologues.

  6. Estudo parcial da validação do Atlas do Rorschach Sistema Compreensivo em amostra de pacientes psiquiátricos de São Paulo Estudio parcial de la validación del Atlas del Rorschach Sistema Comprensivo en muestra de pacientes psiquiátricos de São Paulo Partial validation study of the Rorschach Comprehensive System atlas on a sample of psychiatric patients of São Paulo

    Directory of Open Access Journals (Sweden)

    Thaís Cristina Marques

    2012-12-01

    Full Text Available Este trabalho é parte do estudo de validação do atlas de localização e da lista de qualidade formal brasileiros do Rorschach Sistema Compreensivo em amostra de pacientes psiquiátricos da cidade de São Paulo, comparando as variáveis X+%, XA%, WDA%, X-% e Xu% dos pacientes com os valores encontrados na amostra normativa brasileira. Foram avaliados 45 pacientes, e os instrumentos de seleção foram a entrevista clínica estruturada para diagnóstico do DSM-IV (SCID-I e a Escala das Síndromes Positiva e Negativa (PANSS. 23 pacientes preencheram critério pela SCID-I para transtornos psicóticos e, destes, 19 foram considerados psicóticos pela PANSS. Todos os protocolos foram classificados segundo as classificações norte-americanas e brasileiras. Foi realizada ANOVA, comparando amostras normativas e o grupo de pacientes. As variáveis XA% e X-% mostraram-se sensíveis para detectar as nuances perceptivas entre as pessoas. As áreas de localização e lista de qualidade formal brasileiras se mostraram válidas para discriminar graus de comprometimento perceptivo.Este trabajo es parte del estudio de validación del atlas de localización y de la lista de calidad formal brasileña del Rorschach Sistema Comprensivo en muestra de pacientes psiquiátricos de la ciudad de São Paulo-Brasil, comparando las variables X+%, XA%, WDA%, X-% y Xu% de los pacientes con los valores encontrados en la muestra normativa brasileña. Fueron evaluados 45 pacientes, los instrumentos de selección fueron la Entrevista clínica estructurada para diagnóstico del DSM-IV (SCID-I y la Escala de las Síndromes Positiva y Negativa (PANSS. 23 pacientes lograron criterio por la SCID-I para trastornos psicóticos y de estos 19 fueron considerados psicóticos por la PANSS. Todos los protocolos fueron clasificados según las clasificaciones norteamericanas y brasileñas. Fue realizada ANOVA, comparando muestras normativas y el grupo de pacientes. Las variables XA% y X-% se

  7. En portada SISTEMA RESPIRATORIO

    Directory of Open Access Journals (Sweden)

    Andrés J. Flores Alés,

    2005-10-01

    Full Text Available La sección “En portada” de este mes está dedicada a los agentes infecciosos y al diagnóstico de algunas de las enfermedades respiratorias más habituales en los animales de compañía, estacando la relevancia adquirida por el diagnóstico mediante la obtención de de imágenes en este campo. También se hace incapie en la actuación que debe llevar a cabo elínico ante una urgencia respiratoria La obtención de imágenes por radiología o endoscopia son dos de las técnicas diagnósticas que más ayudan a dilucidar el proceso respiratorio que sufre un paciente. Sobre el momento en el que se encuentra el diagnóstico por imagen de las patologías del sistema respiratorio en veterinaria nos habla a continuación Andrés J. Flores.

  8. SISTEMAS INMUNES ALTERNATIVOS

    Directory of Open Access Journals (Sweden)

    LUIS F. CADAVID

    2011-01-01

    Full Text Available El sistema inmune en animales es una red compleja de moléculas, células y tejidos que de manera conjunta mantienen la integridad fisiológica y genética de los organismos. Convencionalmente se ha considerado la existencia de dos clases de inmunidad, la innata y la adaptativa. La primera es ancestral, con variabilidad limitada y baja discriminación, mientras que la segunda es altamente variable, específica y restringida a vertebrados mandibulados. La inmunidad adaptativa se basa en receptores de antígeno que se rearreglan somáticamente para generar una diversidad casi ilimitada de moléculas. Este mecanismo de recombinación somática muy probablemente emergió como consecuencia de un evento de transferencia horizontal de transposones y transposasas bacterianas en el ancestro de los vertebrados mandibulados. El reciente descubrimiento en vertebrados no mandibulados e invertebrados de mecanismos alternativos de inmunidad adaptativa, sugiere que en el transcurso de la evolución distintos grupos animales han encontrado soluciones alternativas al problema del reconocimiento inmunológico.

  9. Micoses do sistema nervoso

    Directory of Open Access Journals (Sweden)

    Carlos da Silva Lacaz

    1947-03-01

    Full Text Available As micoses do sistema nervoso central não têm merecido atenção cuidadosa dos neurologistas. Elas afetam o neuraxe em diferente percentagem: a granulomatose criptocóccica (torulose é a mais freqüente, seguindo-se a actinomicose; a granulomatose paracoccidióidica só excepcionalmente determina lesões meningoencefálicas. Do ponto de vista clínico, as neuromicoses podem ser divididas em duas formas: tumorais encefalomedulares e meningíticas. Estas predominam sobre as tumorais, das quais são mais freqüentes as de localização encefálica. Não são raros os quadros mistos, meningoencetálicos. As formas tumorals encefálicas abrangem vários tipos anátomo-patológicos - abscesso, granuloma, nódulos e cistos - sendo mais comuns os dois primeiros, todos êles produzindo o quadro clinico da síndrome hipertensiva intracraniana. As formas meningomedulares, em geral, são secundárias às lesões ósseas vertebrais, sendo a actinomicose, por ser a mais osteófila, a micose que mais freqüentemente atinge a medula. Nestes casos, o quadro clínico da síndrome compressiva é o mais comum. As meninges participam do processo fúngico, na maior parte dos casos; as manifestações clínicas variam desde o simples meningismo, até as meningites purulentas e meningoencefalites graves, havendo a possibilidade de se formarem aracnoidites císticas, ependimites e bloqueios ventriculares, do aqueduto ou mesmo do canal raquidiano. O diagnóstico das micoses do sistema nervoso central é comumente um "achado de autópsia". Somente a verificação do cogumelo no líquor e o seu isolamento permitem um diagnóstico seguro. Outros dados liquóricos, quando bem interpretados com os achados clínicos e neurológicos, orientam o analista na pesquisa do agente fúngico. O quadro anátomo-patológico nada tem de caraterístico, a não ser a presença do agente parasitário e só o seu encontro firma o diagnóstico. Examinamos 25 casos de granulomatose

  10. Blastomicose do sistema nervoso

    Directory of Open Access Journals (Sweden)

    Horácio M. Canelas

    1951-09-01

    Full Text Available Os autores chamam a atenção sôbre os erros de diagnóstico nos casos de neuroblastomicose, seja nas formas meningoencefálicas, seja nas tumorais. São focalizadas a paracoccidioidose e a criptococose. Depois de caracterizarem clìnicamente a paracoccidioidose, acentuam a raridade das formas nervosas (1,2% dos casos dessa micose autopsiados no Departamento de Anatomia Patológica da Faculdade de Medicina da Universidade de São Paulo. Pela revisão da literatura foi verificado haver apenas 12 casos registrados. 0 caso de Casiello e Klass é o único em que o diagnóstico foi feito em vida; os demais, ou constituem achado de necropsia, ou foram inesperadamente revelados pelo exame histopatológico realizado após intervenções cirúrgicas. Os autores registram 2 casos de paracoccidioidose do sistema nervoso. No primeiro, tratava-se de meningomielorra-diculite crônica, sendo o parasito identificado no escarro; o segundo era portador de síndrome de compressão medular, cuja patogenia é discutida pelos autores, tendo sido a etiologia paracoccidióidica comprovada pelo exame da polpa e biópsia ganglionares. Considerações clínicas sôbre a criptococose precedem o relato de um caso de meningoencefalomielite subaguda, no qual fôra feito em vida o diagnóstico de paracoccidioidose, pelo exame micológico do liqüido cefalorraqueano; êste paciente, embora medicado com doses maciças de sulfa e tiossemicarbarsona, veio a falecer, tendo o exame anátomo-patológico revelado tratar-se, na realidade, de lesões nervosas produzidas pelo Crypíococcus neo-formans. Nos três casos era incisivo o caráter neurocirúrgico da sintomatologia. Entretanto, ante o diagnóstico de paracoccidioidose, foi instituído tratamento pelas sulfas, vacina específica e tiossemicarbarsona. Os resultados foram excelentes no caso 2, em que a terapêutica pôde ser instituída mais precocemente; melhoras também foram obtidas no caso 1. No caso 3, foram verificadas

  11. Research Progress in Treatment of Oily Wastewater by Flocculation Method%絮凝法处理含油废水研究进展

    Institute of Scientific and Technical Information of China (English)

    赵翠; 李正阳; 李萍

    2014-01-01

    Flocculation method is a common method in oily wastewater treatment technology, has a great prospect in wastewater treatment. In this paper, the chemical flocculation, the combined flocculation, the magnetic flocculation, the electricity flocculation, the micro flocculation, and the microbial flocculation were described, and their characteristics, mechanisms, research and application situation were introduced. The forward application in oily wastewater treatment was discussed.%絮凝法作为水处理工艺中常见的方法,在废水处理方面具有广阔的发展前景,主要介绍了化学絮凝,联合絮凝,磁絮凝,电絮凝,微絮凝,微生物絮凝的特点,机理,研究和应用情况,并对其在含油废水处理的应用提出了展望。

  12. Enhanced prostaglandin F2α formation in human pregnancy and the effect of increased oily fish intake: results from the Salmon in Pregnancy Study.

    Science.gov (United States)

    Helmersson-Karlqvist, Johanna; Miles, Elizabeth A; Vlachava, Maria; Kremmyda, Lefkothea-Stella; Noakes, Paul S; Diaper, Norma D; Godfrey, Keith M; Calder, Philip C; Basu, Samar

    2012-01-01

    Oily fish intake during pregnancy may reduce the risk of allergic diseases in infancy possibly by shifts in the fatty acid balance and subsequent altered prostaglandin (PG) formation. This intervention is the first study to evaluate if increased oily fish intake affects in vivo PGF(2α) formation during pregnancy. British pregnant women were randomised to two portions of farmed salmon weekly (n=47), or maintenance of their normal diet low in fish (n=41), from pregnancy week 20 until parturition. The concentrations of eicosapentaenoic and docosahexaenoic acids in plasma phosphatidylcholine (PC) were higher and the concentration of arachidonic acid in plasma PC was lower in the salmon group than the control group at weeks 34 and 38 of pregnancy. PGF(2α) formation was evaluated by urinary measurement of 15-keto-dihydro-PGF(2α), a major PGF(2α) metabolite, at 20, 34 and 38 weeks. In both the salmon and control groups urinary 15-keto-dihydro-PGF(2α) concentrations increased significantly during pregnancy, which may be of physiological importance. Oily fish intervention altered fatty acid concentrations but did not affect urinary 15-keto-dihydro-PGF(2α) concentrations in pregnant women.

  13. 含油污泥的回收处理工艺研究%The Research on Oily Sludge Treatment Technology

    Institute of Scientific and Technical Information of China (English)

    马莉莎; 杜宇斌; 马飞; 李陈

    2012-01-01

    含油污泥是一种高度危险污染物。随着环保法规的日益严格和完善,含油污泥无害化、清洁化、资源化处理技术将成为污泥处理技术发展的必然趋势。进行了回收石油资源、无害化处理的实验研究,得出了最佳工艺条件,并提出了今后的发展方向与对策。%Oily sludge is a highly dangerous peUutants. With increasingly stringent environmental regulations and improvement of oily sludge harmless, clean, resource processing sludge treatment technology will be an inevitable trend. Some experiments on treatment of recycling the petroleum resources and safe disposal have been done to get the optimal conditions and to propose future directions and strategies on oily sludge treatment.

  14. TREATMENT OF OILY SLUDGE THROUGH COMPOSTING%堆肥法处理含油污泥的研究

    Institute of Scientific and Technical Information of China (English)

    余冬梅; 骆永明; 刘五星; 王纯利; 李振高

    2009-01-01

    通过添加稻草和有机肥对含油污泥进行了115 d的堆肥处理,动态监测了堆制过程中总石油烃含量、温度、C/N/P比例及功能微生物数量变化,测定了堆制前后石油组分和生物毒性,探讨了堆肥法处理降解油泥的效果.结果表明,堆肥处理后油泥中的总石油烃含量从123±1 g kg~(-1)降低至71.7±0.7 g kg~(-1),降解率达42%,是未堆肥对照处理的2.5倍;堆体在第21天达到最高温度50℃;堆肥处理的C/N/P比例变化呈现下降趋势;堆肥过程中油泥中烃降解菌和芳烃降解菌与堆制前比较增加了近2个数量级.此外,含油污泥经堆肥法处理后生物毒性降低,EC50从1.77±0.28 mg ml~(-1)提高至2.76±0.38 mg ml~(-1).%A 115-day experiment of composting oily sludge with straw and organic manure was carried out. During the process, dynamics of total petroleum hydrocarbon (TPH) content, temperature, C/N/P ratio and population of functional microorganisms were monitored, and composition and biotoxicity of petroleum waste were analyzed before and after composting. Results show that TPH content decreased from 123±1 g kg~(-1) to 71.7±0.7 g kg~(-1), demonstrating a degradation rate of 42%, which was 2.5 times high than CK (without composting). The composting treatment reached the highest temperature, 50℃ on D21 and showed a decreasing C/N/P ratio. The counts of hydrocarbon degraders and aromatic hydrocarbon degraders in the composted sludge increased by about 2 orders of magnitudes compared with those in the uncomposted sludge. Moreover, EC50 in the oily sludge increased from 1.77±0.28 mg ml~(-1) before composting to 2.76±0.38 mg ml~(-1) after composting, indicating a decrease in biotoxicity of the sludge.

  15. Un sistema desconocido pero internacional

    OpenAIRE

    2008-01-01

    Se presenta en este trabajo un estudio sobre el Sistema Internacional de Unidades (SI) en la etapa de Educación Secundaria (13 a 18 años), cuyo objetivo es comprobar si el alumnado conoce las siete magnitudes y unidades fundamentales, que manejan habitualmente en el aula. A partir del currículum de ciencias se han analizado las posibles causas de las deficiencias encontradas en las magnitudes fundamentales y derivadas. Los resultados muestran que el sistema a pesar de ser inter...

  16. Sistema de salud de Brasil

    OpenAIRE

    Víctor Becerril Montekio; Guadalupe Medina; Rosana Aquino

    2011-01-01

    En este trabajo se describe el sistema de salud de Brasil, que está compuesto por un sector público que cubre alrededor de 75% de la población y un creciente sector privado que ofrece atención a la salud al restante 25% de los brasileños. El sector público está constituido por el Sistema Único de Salud (SUS) y su financiamiento proviene de impuestos generales y contribuciones sociales recaudadas por los tres niveles de gobierno (federal, estatal y municipal). El SUS presta servicios de manera...

  17. Sistema de coordenadas para AR

    OpenAIRE

    Aguiar Cabello, Arnau

    2012-01-01

    Este proyecto realiza un estudio sobre las diferentes opciones referentes a la Realidad Aumentada, como primera parte. La Realidad Aumentada es una tecnología que en los últimos años ha experimentado un gran desarrollo. La Realidad Aumentada consiste en sobreponer información virtual con la ya existente realidad física. Como segunda parte, se escoge una de estas opciones, NyARToolkit, y se explica el funcionamiento del sistema de coordenadas basado en marcadores. El sistema basado en marca...

  18. Algunos Hechos Estilizados del Sistema Bancario Peruano

    OpenAIRE

    Espino, Freddy

    2013-01-01

    Estima el tipo de relación que existe entre las principales variables del sistema bancario (colocaciones y depósitos) y las variables macroeconómicas que afectan el desempeño del sistema bancario.

  19. Sistemas de control moderno volumen II: sistemas de tiempo discreto

    OpenAIRE

    Fernández del Busto, Ricardo; Ramírez Mendoza, Ricardo A.

    2014-01-01

    El objetivo del eBook es iniciar al estudiante en los conceptos de los sistemas de control en tiempo discreto de tal manera que el alumno pueda entender los temas y complementarlos con los contenidos de libros de texto clásicos, ya sea para autoestudio o desarrollo de tareas.

  20. Sistema de incendios inalámbrico

    OpenAIRE

    Menéndez Muñiz, Sergio

    2012-01-01

    Sistema de detección de incendios inalámbrico basado en dispositivos "motes" para la monitorización del estado del sistema, detección y reconocimiento de alarmas. Sistema de detecció d'incendis sense fils basat en dispositius "motes" per a la monitorització de l'estat del sistema, detecció i reconeixement d'alarmes.

  1. Sistema de incendios inalámbrico

    OpenAIRE

    Menéndez Muñiz, Sergio

    2012-01-01

    Sistema de detección de incendios inalámbrico basado en dispositivos "motes" para la monitorización del estado del sistema, detección y reconocimiento de alarmas. Sistema de detecció d'incendis sense fils basat en dispositius "motes" per a la monitorització de l'estat del sistema, detecció i reconeixement d'alarmes.

  2. El sistema tributario japonés

    OpenAIRE

    Yoshiyasu Okada

    2002-01-01

    Este documento primeramente trata las tendencias recientes y el estado actual del sistema tributario japonés como antecedentes. Luego resume los impuestos principales y describe el actual sistema. Finalmente trata los incentivos tributarios y los aspectos internacionales del sistema japonés.

  3. El sistema tributario japonés

    OpenAIRE

    Yoshiyasu Okada

    2002-01-01

    Este documento primeramente trata las tendencias recientes y el estado actual del sistema tributario japonés como antecedentes. Luego resume los impuestos principales y describe el actual sistema. Finalmente trata los incentivos tributarios y los aspectos internacionales del sistema japonés.

  4. Molecular and Functional Analyses of the Fast Skeletal Myosin Light Chain2 Gene of the Korean Oily Bitterling, Acheilognathus koreensis

    Directory of Open Access Journals (Sweden)

    Hyun Kook Cho

    2013-08-01

    Full Text Available We identified and characterized the primary structure of the Korean oily bitterling Acheilognathus koreensis fast skeletal myosin light chain 2 (Akmlc2f, gene. Encoded by seven exons spanning 3955 bp, the deduced 168-amino acid AkMLC2f polypeptide contained an EF-hand calcium-binding motif and showed strong homology (80%–98% with the MLC2 proteins of Ictalurus punctatus and other species, including mammals. Akmlc2f mRNA was highly enriched in skeletal muscles, and was detectable in other tissues. The upstream regions of Akmlc2f included a TATA box, one copy of a putative MEF-2 binding site and several putative C/EBPβ binding sites. The functional activity of the promoter region of Akmlc2f was examined using luciferase and red fluorescent protein reporters. The Akmlc2f promoter-driven reporter expressions were detected and increased by the C/EBPβ transcription factor in HEK293T cells. The activity of the promoter of Akmlc2f was also confirmed in the developing zebrafish embryo. Although the detailed mechanism underlying the expression of Akmlc2f remains unknown, these results suggest the muscle-specific expression of Akmlc2f transcript and the functional activation of Akmlc2f promoter by C/EBPβ.

  5. Oily nanosuspension for long-acting intramuscular delivery of curcumin didecanoate prodrug: preparation, characterization and in vivo evaluation.

    Science.gov (United States)

    Wei, Xiao-Lan; Han, Ying-Rui; Quan, Li-Hui; Liu, Chun-Yu; Liao, Yong-Hong

    2013-05-13

    The objective of this study was to prepare the nanocrystals of curcumin didecanoate (CurDD) by wet ball milling and to investigate the comparative pharmacokinetics of oily nano- and micro-suspensions after intramuscular (i.m.) administration to rats. Upon optimizing the wet ball milling parameters, CurDD nanocrystals were produced with median particle size of ~500 nm and the freeze-dried nanocrystals were readily dispersed in peanut oil to form stable nanosuspensions. Although the nanosuspension appeared to exhibit slower clearance from the injection site after i.m. injection, compared to microsuspension (~5 μm), a significantly higher maximum plasma curcumin concentration (69.0 ng/ml) was observed for the former than that for the latter (18.5 ng/ml). In addition, the nanosuspension provided significant higher plasma curcumin concentrations and brain CurDD contents for at least 15 days than the microsuspension, except for the initial times. A single i.m. injection of nanosuspension appeared to achieve reversal effect on reserpine-induced hypothermia for at least 13 days. This study demonstrates that CurDD nanosuspension may act as a long-acting i.m. injectable for sustained delivery of curcumin, potentially applicable to elicit a long-lasting antidepressant effect.

  6. Biodegradation Ability and Catabolic Genes of Petroleum-Degrading Sphingomonas koreensis Strain ASU-06 Isolated from Egyptian Oily Soil

    Directory of Open Access Journals (Sweden)

    Abd El-Latif Hesham

    2014-01-01

    Full Text Available Polycyclic aromatic hydrocarbons (PAHs are serious pollutants and health hazards. In this study, 15 PAHs-degrading bacteria were isolated from Egyptian oily soil. Among them, one Gram-negative strain (ASU-06 was selected and biodegradation ability and initial catabolic genes of petroleum compounds were investigated. Comparison of 16S rRNA gene sequence of strain ASU-06 to published sequences in GenBank database as well as phylogenetic analysis identified ASU-06 as Sphingomonas koreensis. Strain ASU-06 degraded 100, 99, 98, and 92.7% of 100 mg/L naphthalene, phenanthrene, anthracene, and pyrene within 15 days, respectively. When these PAHs present in a mixed form, the enhancement phenomenon appeared, particularly in the degradation of pyrene, whereas the degradation rate was 98.6% within the period. This is the first report showing the degradation of different PAHs by this species. PCR experiments with specific primers for catabolic genes alkB, alkB1, nahAc, C12O, and C23O suggested that ASU-06 might possess genes for aliphatic and PAHs degradation, while PAH-RHDαGP gene was not detected. Production of biosurfactants and increasing cell-surface hydrophobicity were investigated. GC/MS analysis of intermediate metabolites of studied PAHs concluded that this strain utilized these compounds via two main pathways, and phthalate was the major constant product that appeared in each day of the degradation period.

  7. Epicoccum nigrum and Cladosporium sp. for the treatment of oily effluent in an air-lift reactor

    Science.gov (United States)

    Queissada, Daniel Delgado; da Silva, Flávio Teixeira; Penido, Juliana Sundfeld; Siqueira, Carolina Dell’Aquila; de Paiva, Tereza Cristina Brazil

    2013-01-01

    The metalworking industry is responsible for one of the most complex and difficult to handle oily effluents. These effluents consist of cutting fluids, which provide refrigeration and purification of metallic pieces in the machining system. When these effluents are biologically treated, is important to do this with autochthonous microorganisms; the use of these microorganisms (bioaugmentation) tends to be more efficient because they are already adapted to the existing pollutants. For this purpose, this study aimed to use two indigenous microorganisms, Epicoccum nigrum and Cladosporium sp. for metalworking effluent treatment using an air-lift reactor; the fungus Aspergillus niger (laboratory strain) was used as a reference microorganism. The original effluent characterization presented considerable pollutant potential. The color of the effluent was 1495 mg Pt/L, and it contained 59 mg/L H2O2, 53 mg/L total phenols, 2.5 mgO2/L dissolved oxygen (DO), and 887 mg/L oil and grease. The COD was 9147 mgO2/L and the chronic toxicity factor was 1667. Following biotreatment, the fungus Epicoccum nigrum was found to be the most efficient in reducing (effective reduction) the majority of the parameters (26% COD, 12% H2O2, 59% total phenols, and 40% oil and grease), while Cladosporium sp. was more efficient in color reduction (77%). PMID:24294260

  8. Biodegradation ability and catabolic genes of petroleum-degrading Sphingomonas koreensis strain ASU-06 isolated from Egyptian oily soil.

    Science.gov (United States)

    Hesham, Abd El-Latif; Mawad, Asmaa M M; Mostafa, Yasser M; Shoreit, Ahmed

    2014-01-01

    Polycyclic aromatic hydrocarbons (PAHs) are serious pollutants and health hazards. In this study, 15 PAHs-degrading bacteria were isolated from Egyptian oily soil. Among them, one Gram-negative strain (ASU-06) was selected and biodegradation ability and initial catabolic genes of petroleum compounds were investigated. Comparison of 16S rRNA gene sequence of strain ASU-06 to published sequences in GenBank database as well as phylogenetic analysis identified ASU-06 as Sphingomonas koreensis. Strain ASU-06 degraded 100, 99, 98, and 92.7% of 100 mg/L naphthalene, phenanthrene, anthracene, and pyrene within 15 days, respectively. When these PAHs present in a mixed form, the enhancement phenomenon appeared, particularly in the degradation of pyrene, whereas the degradation rate was 98.6% within the period. This is the first report showing the degradation of different PAHs by this species. PCR experiments with specific primers for catabolic genes alkB, alkB1, nahAc, C12O, and C23O suggested that ASU-06 might possess genes for aliphatic and PAHs degradation, while PAH-RHDαGP gene was not detected. Production of biosurfactants and increasing cell-surface hydrophobicity were investigated. GC/MS analysis of intermediate metabolites of studied PAHs concluded that this strain utilized these compounds via two main pathways, and phthalate was the major constant product that appeared in each day of the degradation period.

  9. Thoughts on Seeing "El Sistema"

    Science.gov (United States)

    Booth, Eric

    2009-01-01

    The FESNOJIV (the Spanish acronym for the State Foundation for the National System of Youth and Children's Orchestras), more commonly known as "El Sistema," teaches 300,000 of Venezuela's poorest children in the nationwide music learning program. Many begin attending the "nucleo" as early as age two or three, and the vast…

  10. Knowledge Exchange with Sistema Scotland

    Science.gov (United States)

    Allan, Julie; Moran, Nikki; Duffy, Celia; Loening, Gica

    2010-01-01

    This paper reports on a knowledge exchange project, funded by the Scottish Funding Council and undertaken by a group of researchers from three higher education institutions in Scotland and the project partner, Sistema Scotland. This newly established charity is attempting to implement a major programme of social change, developed in Venezuela,…

  11. Thoughts on Seeing "El Sistema"

    Science.gov (United States)

    Booth, Eric

    2009-01-01

    The FESNOJIV (the Spanish acronym for the State Foundation for the National System of Youth and Children's Orchestras), more commonly known as "El Sistema," teaches 300,000 of Venezuela's poorest children in the nationwide music learning program. Many begin attending the "nucleo" as early as age two or three, and the vast majority continue well…

  12. Thoughts on Seeing "El Sistema"

    Science.gov (United States)

    Booth, Eric

    2009-01-01

    The FESNOJIV (the Spanish acronym for the State Foundation for the National System of Youth and Children's Orchestras), more commonly known as "El Sistema," teaches 300,000 of Venezuela's poorest children in the nationwide music learning program. Many begin attending the "nucleo" as early as age two or three, and the vast…

  13. Knowledge Exchange with Sistema Scotland

    Science.gov (United States)

    Allan, Julie; Moran, Nikki; Duffy, Celia; Loening, Gica

    2010-01-01

    This paper reports on a knowledge exchange project, funded by the Scottish Funding Council and undertaken by a group of researchers from three higher education institutions in Scotland and the project partner, Sistema Scotland. This newly established charity is attempting to implement a major programme of social change, developed in Venezuela,…

  14. El Sistema de patentes en Colombia

    Directory of Open Access Journals (Sweden)

    Rafael Viana Barceló

    2014-01-01

    Full Text Available En este documento se realiza un análisis económico del Sistema de Patentes de Colombia. Para ello, se establece el efecto que tienen las patentes concedidas a los inventores foráneos sobre la Inversión Extranjera Directa y el Producto Interno Bruto Nacional, a través de la técnica de regresión de data panel. De igual manera, se identifican los sectores económicos que registran mayores tasas de innovación por parte de los inventores nacionales y extranjeros. Se muestra que el sistema nacional de propiedad intelectual tiene un grado de fortaleza acorde con el resto de países latinoamericanos; para ello, se construye un índice de grado de fortalecimiento de sistema de patente nacional que luego será comparado con el de otros países latinos.Palabras Clave: Sistema de Patentes; Derechos de Propiedad Intelectual; Inversión Directa extranjera; Producto Interno Bruto e innovación tecnológica. The system of patents in ColombiaAbstractIn this document an economic analysis of the System of Patents of Colombia is made. For it, the effect that has the patents granted to the foreign inventors on the Direct Foreign Investment and the Internal Product Gross National, through the technique of regression of data settles down panel. Of equal way, the economic sectors are identified that register greater rates of innovation on the part of the national and foreign inventors.Sample that the national system of intellectual property has a degree of agreed strength with the rest of Latin American countries; for it, an index of degree of fortification of system of national patent is constructed that soon will be compared with the one of other Latin countries.Keywords: System Patent; Rights of Intellectual Property; Foreign Direct Investment; Gross Domestic Product and Technology Innovation.

  15. Sampling plan for the analysis of aflatoxin in peanuts and corn: an update Sistema de amostragem para análise de aflatoxinas em amendoim e milho: uma atualização

    Directory of Open Access Journals (Sweden)

    Homero Fonseca

    2002-06-01

    Full Text Available The aim of this paper was to update the sampling plan for analysis of mycotoxins in grains, formerly published by the author. The proposed alterations were based on the acquired experience on its application and on FAO recommendations. This update restricts the scope of the former plan and establishes a sampling plan for analysis of aflatoxin in peanuts and corn, by means of modified formulas, the minimum number of sacks or points (when in bulk from which incremental samples should be drawn to make a bulk sample. Fractional exponents (square roots of the formulas proportionally decrease the number of sacks/points to be sampled as the lot size increases. Operating Characteristic (OC curves developed for in-shell and shelled peanuts and corn as well as trend curves of the coefficient variation for different sample sizes (weights are presented.O objetivo deste trabalho foi atualizar a metodologia de amostragem para análise de micotoxinas em grãos, anteriormente publicada pelo autor. As alterações propostas tiveram por base a experiência adquirida na sua utilização e em recomendações da FAO. Esta atualização restringe a aplicação do método anterior e estabelece um plano de amostragem para análise de aflatoxina em amendoim e em milho por meio de fórmulas modificadas, o mínimo de sacos ou pontos (quando a granel dos quais devem ser retiradas amostras incrementais para constituir uma amostra. Expoentes fracionários (raiz quadrada das fórmulas diminuem proporcionalmente o número de sacos/pontos a serem amostrados, à medida que o lote aumenta de tamanho. Curvas de operação característica (OC desenvolvidas para amendoim em casca e descascado e milho, bem como curvas de tendência dos coeficientes de variação, para diferentes tamanhos de amostra (peso, são apresentadas.

  16. Las virtudes del sistema binominal

    Directory of Open Access Journals (Sweden)

    John M Carey

    2006-01-01

    Full Text Available El sistema único de elecciones legislativas chileno, en el que cada distrito elige a dos representantes (M=2, ha sido objeto de controversia y de propuestas de reforma, ya que fue impuesto por el régimen autoritario saliente en 1990. La mayor parte de ellas aboga por la llamada mayor proporcionalidad. Este ensayo sostiene que, a pesar de sus orígenes no democráticos, el sistema M=2 ha funcionado relativamente bien respecto a los sistemas empleados en muchos otros países. En particular, M=2 en Chile entrega una mezcla adecuada de representatividad, gobernabilidad y responsabilidad individual del legislador. El ensayo considera varias alternativas para la reforma y perfila algunos problemas potenciales que cada una implicaría. Si se reforma el sistema chileno, entonces el autor recomienda que se haga por pasos incrementales, no fundamentales -un aumento moderado en la magnitud de cada distrito-, pero manteniendo las listas abiertas y no haciendo el salto a un sistema mixto de miembros (SMMChile's unique system of legislative elections, in which each district elects two representatives (M=2, has been subject to controversy and a target for reform proposals since it was imposed on the country by the outgoing authoritarian regime in 1990. Most reform advocates call for greater proportionality. This essay argues that, desipte its undemocratic origins, the M=2 system has performed quite well relative to systems used in many other countries. In particular, M=2 in Chile delivers a reasonable mix of representativeness, governability, and individual legislator accountability. The essay goes on to consider various alternatives for reform and outlines some potential problems each would entail. If the Chilean system is to be reformed, the essay recommends incrementalism - a moderate increase in district magnitude, perhaps, but maintaining open lists, and no change to a mixed-member system (MMS

  17. Sistemas operativos distribuídos

    OpenAIRE

    Bastidas C., Jose Fernando; Carrillo Guzmán, Herbert; Cifuentes C., David Eduardo; Serrano B., María Fernanda; Vargas Cabas, Andres

    2010-01-01

    Desde hace algunos años el uso de los computadores ha cambiado enormemente, debido a la transición, desde los sistemas centralizados que constan de un único CPU, sus periféricos de memoria y algunas terminales, hacia sistemas de cómputo compuestos por un gran número de CPUs, conectados mediante una red de alta velocidad, conocidos como Sistemas Distribuidos. Aunque los sistemas operativos necesarios para estos Sistemas Distribuidos están apenas en etapa de sur...

  18. Detection of Legionella pneumophila in water and biofilm samples by culture and molecular methods from man-made systems in São Paulo - Brazil Detecção de Legionella pneumophila por métodos de cultivo e moleculares em sistemas artificiais de climatização de ambientes interiores em São Paulo - Brasil

    Directory of Open Access Journals (Sweden)

    Fábio R.S. Carvalho

    2007-12-01

    Full Text Available Legionella pneumophila is a pathogenic bacteria associated to aquatic habitat of natural and artificial environments. Clinical cases of legionellosis have been reported in Brazil but there is a lack of information about the incidence and concentration of this bacterium in environmental sources. Thus, the present study was designed to evaluate the occurrence of legionellae in São Paulo city, Brazil, using different methods of detection and identification. Sixty-seven water and biofilm samples from natural reservoirs and man-made systems were collected and analyzed for the presence of Legionella spp by culturing onto a selective medium, coculture in axenic free-living amoebae and direct fluorescent antibody (DFA assay. Results showed that freshwater of reservoirs did not contain legionellae, Legionella pneumophila was isolated from man-made systems, with predominance of Legionella pneumophila serogroup 1 strains. Although there was no statistical difference among the proposed detection methods, the plate culture method yielded a higher number of L. pneumophila positive samples, followed by amoebic coculture procedure and direct fluorescent antibody assay. Results of PCR and sequencing reactions revealed that application of macrophage infectivity potentiator gene as a molecular marker was an important tool for the identification of environmental isolates of L. pneumophila. The agreement among the three detection methods-when all methods yielded similar results- and the prevalence of a single Legionella species in the sampled man-made systems could suggest that the occurrence of this bacterium had been influenced by the higher concentration of metallic ions dissociated in water of those systems than in natural reservoirs. Thus, the results of this study revealed that the water of man-made systems in Sao Paulo may serve as a reservoir for L. pneumophila and other microorganism, including free-living protozoans.Legionella pneumophila é uma bact

  19. Introducción al estudio de los sistemas económicos

    OpenAIRE

    García Nossa, Antonio

    2010-01-01

    Interdependencia de los sistemas; Coexistencia de los sistemas; Sucesión y coexistencia; Sistemas históricos y sistemas geopolíticos; Factores cuantitativos y cualitativos de los sistemas; Principios generales de los sistemas.

  20. Microbial diversity, community composition and metabolic potential in hydrocarbon contaminated oily sludge: prospects for in situ bioremediation.

    Science.gov (United States)

    Das, Ranjit; Kazy, Sufia K

    2014-06-01

    observation indicated the presence of diverse groups of microorganisms including hydrocarbonoclastic, nitrate reducing, sulphate reducing, fermentative, syntrophic, methanogenic and methane-oxidizing bacteria and Archaea within the sludge community, which can be exploited for in situ bioremediation of the oily sludge.

  1. Water reclamation from emulsified oily wastewater via effective forward osmosis hollow fiber membranes under the PRO mode.

    Science.gov (United States)

    Han, Gang; de Wit, Jos S; Chung, Tai-Shung

    2015-09-15

    By using a novel hydrophilic cellulose acetate butyrate (CAB) as the membrane material for the hollow fiber substrate and modifying its outer surface by polydopamine (PDA) coating and inner surface by interfacial polymerization, we have demonstrated that the thin-film composite (TFC) membranes can be effectively used for sustainable water reclamation from emulsified oil/water streams via forward osmosis (FO) under the pressure retarded osmosis (PRO) mode. The newly developed TFC-FO hollow fiber membrane shows characteristics of high water flux, outstanding salt and oil rejection, and low fouling propensity. Under the PRO mode, the newly developed TFC-FO membrane exhibits a water flux of 37.1 L m(-2) h(-1) with an oil rejection of 99.9% using a 2000 ppm soybean oil/water emulsion as the feed and 1 M NaCl as the draw solution. Remarkable anti-fouling behaviors have also been observed. Under the PRO mode, the water flux decline is only 10% of the initial value even after a 12 h test for oil/water separation. The water flux of the fouled membrane can be effectively restored to 97% of the original value by water rinses on the fiber outer surface without using any chemicals. Furthermore, the flux declines are only 25% and 52% when the water recovery of a 2000 ppm soybean oil/water emulsion and a 2000 ppm petroleum oil/water emulsion containing 0.04 M NaCl reaches 82%, respectively. This study may not only provide insightful guidelines for the fabrication of effective TFC-FO membranes with high performance and low fouling behaviors for oily wastewater under the PRO mode but also add an alternative perspective to the design of new materials for water purification purposes.

  2. Nociones del Sistema Tributario Mexicano

    Directory of Open Access Journals (Sweden)

    Froylán Balderas Torres

    2012-01-01

    Full Text Available La presente información se encamina a interiorizar al lector en el tema fiscal con palabras sencillas, describiendo en forma sucinta los antecedentes de los tributos, hasta llegar y describir el sistema impositivo actual mexicano, y de ahí estudiar en forma específica el impuesto que tiene más relevancia por la cantidad que se recauda siendo el Impuesto Sobre la Renta.

  3. Sistemas de control en estructuras

    Directory of Open Access Journals (Sweden)

    José Luis Ahumada Villafañe

    2010-01-01

    Full Text Available En el diseño estructural, la capacidad de disipación de energía en elementos que conforman los sistemas resistentes a fuerzas dinámicas, como las impartidas por la actividad sísmica y eólica, es suministrada por un minucioso detallado del acero de refuerzo y dimensiones en las secciones transversales de los elementos. Esta práctica es realizada bajo muchas suposiciones que en algunas ocasiones no corresponden a la realidad, y como es de esperarse, producen resultados inexactos y un desconocimiento del desempeño de la estructura. Por lo anterior es riesgoso confiar el 100% de la capacidad estructural a los elementos sobre todo cuando conforman sistemas estructurales diseñados en zonas de amenaza sísmica alta. En este artículo se presentan los sistemas de control, los cuales son una serie de dispositivos adaptados a las estructuras que absorben gran parte de la energía sísmica y liberan los elementos estructurales en gran porcentaje de la acción sísmica, logrando disminuir en ellas las solicitaciones (fuerzas internas y las respuestas (derivas con el objetivo de conseguir un buen desempeño, limitar el daño y abaratar los costos de reparación de fallas localizadas. Los sistemas de control que se analizarán en el presente artículo se dividen en control pasivo, control activo, control semiactivo y control híbrido.

  4. Bioremediation of oily contamination by free and immobilized microorganisms on laboratory-scale

    Energy Technology Data Exchange (ETDEWEB)

    Bao, M.; Gong, Y.; Li, Y. [Ocean Univ. of China, Qingdao (China). Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education; Jiang, G. [China Univ. of Petroleum, Dongying (China). College of Petroleum Engineering

    2009-07-01

    This paper described a component immobilization system formed using sodium alginate and active carbon. Two oil-degrading bacterial strains were then isolated from oil-contaminated water samples from an oilfield in China. The Rhosococcus sp and Bacillus cereus sp bacterial strains were studied in order to determine their growth behaviour in the laboratory. Optimal growth conditions were 35 degrees C with a pH of 8 and salinity levels ranging from 2 to 4 per cent. Optimal degradation conditions were similar to optimal growth conditions. Oil degradation rates of the strains ranged between 34.6 and 45.3 per cent after a period of 5 days. A sodium alginate carrier containing active carbon was then used to optimize the microbial immobilization method. Additional experiments showed that the improved immobilization method degraded between 66.3 and 75 per cent of the standard oil samples after a period of 5 days. It was concluded that the immobilized bacteria acted as a bulking agent to facilitate the transfer of oxygen, nutrition, and metabolism needed for rapid hydrocarbon degradation, and increased biological stability. 12 refs., 3 tabs., 4 figs.

  5. Development of a gas chromatographic/mass spectrometric method for determination of phthalates in oily foods.

    Science.gov (United States)

    Sannino, Anna

    2010-01-01

    A GC/MS method was developed for simultaneous determination of 12 phthalates and four other plasticizers--acetyl tributyl citrate, di(2-ethylhexyl) adipate, dibutyl sebacate, di-isononyl cyclohexane 1,2-dicarboxylate (DINCH)--in vegetable oil, pesto, and tomato sauce. Samples were extracted with acetonitrile and cleaned on a Florisil column. The final extract was analyzed by GC in combination with ion trap MS. The phthalates and di-isononyl cyclohexane 1,2-dicarboxylate were detected by MS/MS, while the other three plasticizers were monitored in the same GC run using full scan mode. The analytical process was validated in each matrix by the analysis of blank samples. Performance characteristics, such as linearity, LOQ, precision, and recoveries were studied. Studies at fortification levels of 0.25-200 mg/kg gave mean recoveries ranging from 71 to 106% and RSD values between 7 and 12% for all compounds. LOQs were 0.050-0.10 mg/kg for all the target compounds except di-isononyl phthalate, di-isodecyl phthalate, and DINCH (2.0 mg/kg).

  6. Application of oily sludge treatment technology in delayed coking unit%延迟焦化装置处理含油污泥的技术应用

    Institute of Scientific and Technical Information of China (English)

    徐先财; 蔡海军; 陈凯; 王成章

    2016-01-01

    介绍了中国石油乌鲁木齐石化公司炼油厂采用1.2 Mt/a延迟焦化装置的焦炭余热掺炼含油污泥的技术。采用该技术在焦炭塔冷焦期间,成功处置了含油污泥,并根据掺炼过程中出现的问题,提出了相关注意事项及对策。实际应用结果表明,采用该技术处理含油污泥达到了无害化、资源化和减量化的处理原则,降低了危险废物的处置费用,是炼化企业清洁生产的可行之法。适量掺炼含油污泥对延迟焦化装置的平稳生产和石油焦产品的质量无较大影响,石油焦产品仍能满足3B级产品的质量要求。%Oily sludge was treated through blending process in a 1.2 Mt/a delayed coking unit of Urumqi Petrochemical Company utilizing used heat in coke. Aimed at the problems in the blending process,relevant measures were put forward. It was showed that,through practical application, the oily sludge became harmless and could be used as resource,and the cost of the waste disposal was reduced. By blending the right amount of the oily sludge,the delayed coking unit could smoothly produce petroleum coke product which could meet the quality requirements.

  7. 生物法处理含油污泥的研究进展%Research Progress in Treatment of Oily Sludge by Biological Method

    Institute of Scientific and Technical Information of China (English)

    商雪娇; 李思; 张金辉

    2014-01-01

    With the development of petrol industry, oily sludge yield increases quickly. Oily sludge with complex components and serious emulsification is difficult to treat. Biological treatment of oily sludge has received extensive attention of scholars because it has low cost and no secondary pollution. In this paper, research progress of several biological treatment methods were reviewed, including composting method, combined biological method, bioreactor method, bioremediation method and biological flotation method. Finally, some suggestions about the future development of the biological methods were put forward.%随着石油产业的不断发展,导致含油污泥产量越来越大。含油污泥成分复杂,乳化严重,难于处理,直接排放对环境危害极大。生物法处理含油污泥具有成本低、无二次污染等优点,因此受到国内外学者的广泛关注。主要介绍了几种含油污泥的生物处理方法,包括:生物堆肥法、联合生物法、生物反应器法、生物修复法和生物浮选法,并对生物法处理含油污泥未来的发展提出了一些建议,以期为相关研究提供参考。

  8. 光催化含油污水的可行性研究%Study on the photocatalytic oxidation of oily sewage

    Institute of Scientific and Technical Information of China (English)

    陈颖; 王宝辉; 王秀媛; 王丽颖; 盖翠萍

    2001-01-01

    The feasibility of disposing of oily sewage by using photocatalytic method were studied with several semiconductor TiO2 catalysts. By comparing the activity of the catalysts, factors such as kinds and dosages of catalysts, concentration of oily sewage that affected photocatalytic degradation was investigated. The results show that photocatalytic method is applicable to treat the low concentration oily sewage, the super fine powder TiO2 catalyst is optimal, and the smaller the catalyst powder, the higher the catalyst activity, the optimal dosage is 0.5%.%针对油田含油污水中石油烃类的特点及催化剂在污水中存在的形式,采用结构不同的半导体TiO2为催化剂,研究了光催化处理含油污水的可行性,并对不同催化剂的活性进行了比较,考察了催化剂的种类及用量、污水浓度对油田含油污水光催化降解的影响. 结果表明,光催化法适合处理低质量浓度的含油污水,以超细TiO2催化剂的活性最佳,且粒径越小活性越高,催化剂的质量分数以0.5%为宜. 采用光催化法处理油田含油污水在技术上是可行性.

  9. 罐底油泥脱水及干化方法研究%STUDY ON THE DEHYDRATION-DRYING OF OILY SLUDGE FROM SETTLING TANK

    Institute of Scientific and Technical Information of China (English)

    黄田; 杜国勇

    2011-01-01

    以某油田污水处理厂沉降罐底部油泥为研究对象,结合其稳定性高、含油量较高的特点,提出脱水-干化处理含油污泥的方法.通过实验考察脱水剂种类、脱水剂加量、阳离子型聚丙烯酰胺(CPAM)加量及干化剂加量对处理效果的影响.实验筛选出最佳脱水剂A,其最佳脱水条件为:投加量2%(ω)、快速搅拌过程前CPAM加量为200 mg/L、慢速搅拌前CPAM加量为400 mg/L.在该条件下脱水处理后,油泥含水率从85%左右降至65%左右.干化实验中,脱水油泥在加入5%(ω)氧化钙或者与煤粉简易混合[m(油泥)∶m(煤粉)=1∶1.5]后,晾晒3~4 h可成颗粒状,于电热炉(800℃)上灼烧10~15min,引燃即可燃烧,油泥中的油分可实现再利用.%A dehydration-drying treatment for oily sludge was proposed using oily sludge from the settling tank of an oilfield sewage plant as research object. The effects of dehydration agents and amount, cationic polyacrylamide (CPAM) dosage,curing agents and amount on the treatment were investigated. It was found that using 2% of an optimal dehydration agent A,under the conditions of adding 200 mg/L CPAM prior to high speed stirring and 400 mg/L CPAM prior to low speed stirring,the water content of dehydrated oily sludge was reduced to 65% from the original of 85%. During the drying tests, adding 5% CaO or mixing with breeze (with a mass ratio of sludge/breeze =1/1. 5),drying under sunlight for 3-4 h and calcination at 800 Xl for 10-15 min,the obtained granules were combustible,thus the oily component in sludge was fully reused.

  10. Research on Oily Sludge Treatment by Ultrasonic Solvent Extraction%超声溶剂萃取法处理含油污泥的研究

    Institute of Scientific and Technical Information of China (English)

    孟玉花; 赵朝成; 刘其友; 张秀霞

    2013-01-01

    以新疆克拉玛依的含油污泥为研究对象,先后在超声条件下通过有机溶剂萃取和表面活性剂水洗的方法对其进行综合处理.结果表明:在处理温度为55℃、超声强度为320 W、处理时间为5 min、溶剂比为7.5L·g-1的最佳条件下,有机溶剂石油醚萃取处理后含油污泥的剩余含油量降为6%;在处理温度为55℃、超声强度为320W、处理时间为11 min、溶剂比为15.0 L·g-1、pH值为5的最佳条件下,十二烷基苯磺酸钠-OP-10(1∶1)处理后含油污泥的剩余含油量仅为0.6%.%Using oily sludge from Karamay Oilfield in Xinjiang as research object,the treatment conditions were optimized for oily sludge with organic solvent extraction and surfactant washing under ultrasonic condition through the single factor experiment. When the oily sludge was extracted by petroleum ether under the optimum conditions as follows; treatment temperature of 55℃, ultrasonic intensity of 320 W,treatment time of 5 min,liquid-solid ratio of 7. 5 L·g-1 ,the residual oil content decreased to 6%. And when the oily sludge was furtherly washed by SDBS-OP-10(1:1) under the optimum conditions as follows; treatment temperature of 55℃ ,ultrasonic intensity of 320 W,treament time of 11 min,liquid-solid ratio of 15.0 L·g-1,pH value of 5, the residual oil content was only about 0. 6%.

  11. La reforma del sistema electoral chileno

    Directory of Open Access Journals (Sweden)

    Mariela Rubano Lapasta

    2007-01-01

    Full Text Available La modificación del sistema electoral público chileno se ha transformado nuevamente en tema de debate público, después de la Reforma Constitucional de 2005. El Gobierno ha propuesto reformar el sistema electoral, sustituirlo por otro que permita a las minorías tener representación en el Congreso. Se abordan brevemente los sistemas electorales en el derecho comparado, en especial el caso chileno, evaluando las ventajas y desventajas del sistema electoral nacional. Se propone recurrir al mecanismo de primarias a fin de elegir a los candidatos. Se concluye que no hay ningún sistema ideal, importa más las características del sistema político y no tanto el método electoral con el cual se eligen a los representantes.

  12. Bioremediation of oily hypersaline soil and water via potassium and magnesium amendment.

    Science.gov (United States)

    Al-Mailem, D M; Eliyas, M; Radwan, S S

    2013-12-01

    Ten hydrocarbonoclastic halobacterial species and 5 haloarchaeal species that had been isolated on a mineral medium with oil as the sole carbon source grew better and consumed more crude oil, as measured by gas-liquid chromatography, in media receiving between 0.50 and 0.75 mol/L KCl and between 1.50 and 2.25 mol/L MgSO₄. Chemical analysis revealed that within a certain limit, the higher the KCl and MgSO₄ concentrations in the medium, the more K⁺ and Mg²⁺, respectively, was accumulated by cells of all the tested halobacteria and haloarchaea. Also, in experiments in which total natural microbial consortia in hypersaline soil and water samples were directly used as inocula, the consumption of hydrocarbons was enhanced in the presence of the above given concentrations of KCl and MgSO₄. It was concluded that amendment with calculated concentrations of K⁺ and Mg²⁺ could be a promising practice for hydrocarbon bioremediation in hypersaline environments.

  13. Modelo de sistemas tutores inteligentes multiagente

    OpenAIRE

    Ferrer, Alejandro; Vallejos, Félix Anibal; Jiménez Rey, Elizabeth Miriam; Grossi, María Delia; Servetto, Arturo Carlos; Perichinsky, Gregorio

    2006-01-01

    Se presenta una línea de investigación del Proyecto de la Facultad de Ingeniería de la Universidad de Buenos Aires I015: Manufactura Integrada por Computadora en Sistemas Complejos para el Desarrollo Social, Industrial y de Tecnología. Se introduce conceptos básicos de los campos en los que incursiona esta línea de investigación: Sistemas Tutores Inteligentes (STI) y Sistemas Multiagentes (SMA). Se describe los aspectos esenciales que se deben considerar en el modelado de un sistema ...

  14. Reflexiones sobre los sistemas silvopastoriles

    Directory of Open Access Journals (Sweden)

    R. O Russo

    Full Text Available El objetivo de este análisis es reflexionar acerca de modelos integrados de producción ganadera familiar y extensiva, más estables y sustentables, en los que se integre el componente leñoso, que contribuye a la reducción de gases con efecto invernadero y favorece la mitigación del cambio climático. Para ello se hizo una revisión de conceptos referentes a la integración de la actividad forestal en la ganadería, como alternativa viable de sistema de producción. Se parte del criterio de que los sistemas silvopastoriles (SSP, dentro de los agroforestales, son agroecosistemas en los que se asocia un componente arbóreo con uno herbáceo (pasturas naturales o mejoradas y otro pecuario (ganado en un mismo sitio, donde existen interacciones biológicas entre estos y se maximiza el uso de la tierra. También se describe cómo se agrupan los SSP; sus oportunidades desde los puntos de vista económico, productivo, social y ambiental; y los efectos de la interacción entre sus componentes. Este análisis permite plantear que los SSP son producto de la relación entre la biología, la sociedad y la cultura, y en ellos existe una enorme diversidad; asimismo, permiten la reconversión de la ganadería extensiva de muy baja productividad en sistemas más productivos y sostenibles en el tiempo, así como la rehabilitación de las áreas degradadas por ese tipo de ganadería, por la deforestación y por el agotamiento de los suelos.

  15. Neurocitoma no sistema nervoso central

    Directory of Open Access Journals (Sweden)

    José Torquato Severo

    1973-03-01

    Full Text Available É relatado o caso de uma paciente com 6 anos de idade, hospitalizada com síndrome de hipertensão intracraniana. Após o exame neuro-radiológico que evidenciou processo expansivo frontal direito, a paciente foi submetida à cirurgia, durante a qual ocorreu o óbito. O exame histo-patológico do material retirado durante o ato operatório, permitiu o diagnóstico de neurocitoma, tumor raro no sistema nervoso central.

  16. Riesgos para el sistema mundial

    Directory of Open Access Journals (Sweden)

    José María Tortosa

    2012-02-01

    Full Text Available Partiendo de varios diagnósticos producidos recientemente sobre los riesgos del sistema mundial, se hace una propia lista de los que parecen ser los diez más importantes, a saber, la cuestión del petróleo, el auge de la China, el desplome de los Estados Unidos, la desconexión de América Latina, la crisis de Naciones Unidas, los nuevos terrorismos, la amenaza nuclear, pandemias, cambio climático y polarización social. Como existe una conexión y retroalimentación entre muchos de ellos, se concluye indicando la posibilidad deque estemos entrando en una etapa particularmente caótica en el sistema mundial.Starting from some recent diagnosis about the risks of the world system, a new list is made with the possible more important ones, namely, tipping point in oil, rise of China, breakdown of the United States, new terrorisms, nuclear threat, pandemics, climatic change and social polarization. As far as a connexion and feedback between these elements can be found, the conclusion points to the possibility of a new era especially chaotic in the world system.

  17. Sistemas residenciales: conceptos y aplicaciones

    Directory of Open Access Journals (Sweden)

    Franu00E7oise Dureau

    2004-01-01

    Full Text Available Luego de volver sobre los orígenes de la noción de sistema residencial familiar en la investigación sobre África y América Latina, el artículo expone las técnicas de recolección desarrolladas en dos encuestas colombianas. El análisis de la morfología espacial de los sistemas residenciales familiares de los Bogotanos pone en evidencia las prácticas pluri-locales de la población, las movilidades que las subtienden y la importancia de la localización en las escogencias residenciales. Con este enfoque, el análisis de las prácticas residenciales se desplaza de la vivienda hacia el acceso a los recursos urbanos localizados: los relacionados con el entorno natural, los producidos por los actores políticos y económicos, pero también aquellos construidos por las prácticas sociales de los habitantes. De esta manera, lo que se propone aquí es una renovación de la lectura de las dinámicas espaciales en términos de territorios y un reconocimiento del habitante como actor pleno de la producción de nuevas configuraciones urbanas.

  18. Los Sistemas tecnológicos Concretos

    OpenAIRE

    2011-01-01

    Usando un enfoque sistémico, se estudian cierto tipo de subsistemas sociales que caracterizan a la sociedad contemporánea. Específicamente se definen aquellos tecnosistemas que realizan el diseño y la ejecución de artefactos y/o sistemas artificiales, los que se denominarán sistemas tecnológicos.

  19. Coprotest® quantitativo: quantificação de ovos de helmintos em amostras fecais utilizando-se sistema de diagnóstico comercial Quantitative Coprotest®: quantification of helminth eggs in fecal samples by commercial diagnostic kit

    Directory of Open Access Journals (Sweden)

    Ana Julia Urias Santos Araújo

    2003-06-01

    Full Text Available A técnica coproparasitológica de concentração em formol acetato de etila foi empregada para a quantificação de ovos de helmintos. O método quantitativo proposto foi padronizado utilizando-se o sistema comercial Coprotest® e amostras fecais contendo diferentes cargas de ovos de Ascaris lumbricoides. Para a comparação do Coprotest® quantitativo com outros métodos de quantificação de ovos, foi preparada em laboratório uma série de amostras fecais, com carga decrescente de ovos de A. lumbricoides, Trichuris trichiura e Schistosoma mansoni. Discutem-se as vantagens de se empregar um método capaz de detectar maior número de espécies de helmintos, além de protozoários, e que permita, concomitantemente, estimar a intensidade das infecções por geo-helmintos e S. mansoni nas populações. O Coprotest® quantitativo mostrou ser de aplicação viável, fornecendo resultados comparáveis a outros métodos quantitativos já descritos na literatura.The formol ethyl acetate concentration technique was applied for the quantification of helminth eggs in fecal samples. The proposed quantitative method was standardized through the use of a commercial kit, Coprotest®, and fecal samples with different counts of Ascaris lumbricoides eggs. For the comparison of the quantitative Coprotest® with other methods of egg quantification, a series of fecal samples was prepared in laboratory, with decreasing number of A. lumbricoides, Trichuris trichiura and Schistosoma mansoni eggs. It is discussed the advantages of a method that is able of detecting different helminth and also protozoa species, allowing, in concomitance, to estimate in the populations the intensity of S. mansoni and geohelminth infections. The quantitative Coprotest® showed to be feasible, providing results that were comparable to the other quantitative methods already described in the literature.

  20. Oily Sludge Biodetoxification

    Science.gov (United States)

    2011-05-01

    hydrogen sulfide and ammonia). Alternatively, if the concentration of VOCs in the exhaust air is low, they can be removed with activated carbon...chlorinated solvents, high salinity, extreme pH or temperature will hinder and in some cases poison biological treatment systems. Fortunately, these effects...effectiveness.  Can be poisoned by extremes of pH, salinity, or high concentrations of heavy metals.  Winter in Pennsylvania necessitates the use

  1. Oily Sludge Biodetoxification

    Science.gov (United States)

    2011-05-01

    by passing the exhaust air through biofilters which are closed containers (usually cylindrical ) filled with a mixture of inert filler (to maintain...million worth of 155-millimeter M107 artillery shell casings through September 30, 2004. All production takes place within the ~500,000 square foot...located on the roof of the lower level of the plant, the floor, which dates to the early 1900’s, had to be tested to ensure that it was capable of

  2. Oily Bilgewater Separators

    Science.gov (United States)

    2011-11-01

    central core (permeate tube). Each sheet consists of oleophobic (oil repelling) outer layers and a hydrophilic (water attracting) central layer to...without clogging. Each membrane sheet has two oleophobic (oil repelling) outer surfaces and a hydrophilic (water attracting) inner layer. This...fewer alarms for the crew and minimizes potential for accidental discharge. • Cleans in place without clogging The SPIR-O-LA TOR Membranes’ oleophobic

  3. Validação do sistema de transporte e das dosagens de amostras biológicas enviadas para a central de um laboratório de grande porte Transport system validation and analysis of biological samples sent to a central laboratory

    Directory of Open Access Journals (Sweden)

    Alexandre Gabriel Jr.

    2007-08-01

    Full Text Available A monitoração de vários interferentes nos resultados das análises clínicas laboratoriais originados do sistema de transporte de amostras biológicas de um posto de coleta para o local da fase analítica propriamente dita é de extrema importância. Com o objetivo de avaliar a estabilidade dos bioanalitos durante o transporte, os autores, neste trabalho, monitoraram a temperatura das caixas térmicas. Através de dispositivos medidores de temperatura (chips introduzidos no interior de cada caixa térmica, observou-se que elas permaneceram climatizadas em torno de 13º a 23ºC, simulando a temperatura ambiente por todo o percurso e tempo necessários. Compararam-se os resultados de análises clínicas laboratoriais das amostras biológicas sem transporte realizadas no laboratório de origem da coleta (Jundiaí com os das mesmas amostras biológicas com transporte realizado na central em São Paulo. Inicialmente foram estudados os principais parâmetros bioquímicos e a coagulação do sangue, além da urinálise com bacteriologia. A análise estatística foi de concordância entre as duas médias através do coeficiente de correlação intraclasse e também pela técnica de Bland-Altman, na qual se observou que, entre os 29 analíticos estudados, 23 (79,3% apresentaram concordância boa a excelente; cinco (17,2%, moderada a boa; e uma (3,5%, fraca a moderada. Quanto às uroculturas, elas apresentaram 88% de concordância, portanto boa a excelente, e a urina I apresentou 94% de concordância na hematúria e 87,5% na leucocitúria, também boa a excelente. Os dados obtidos pelas correlações dos resultados das amostras e dos gráficos de temperatura emitidos pelos dispositivos registradores representaram indicadores de validação do sistema de transporte e das análises laboratoriais em até 16 horas após coleta do material, simulando um posto muito distante.The results obtained from biological sample analysis may be affected by several

  4. Sistema Distribuido de Gran Escala

    Directory of Open Access Journals (Sweden)

    Fco. Javier Luna Rosas

    2006-01-01

    Full Text Available Este artículo propone una nueva forma de balancear la carga dinámicamente combinando un modelo Fuzzy-Logic en conjunto con el algoritmo distribuido Request for Bids (RB, el trabajo es centrado en el modelo Fuzzy-Logic con el propósito de mejorar el balanceo dinámico de carga en un sistema distribuido a gran escala. El modelo Fuzzy-Logic y RB fueron implementados en una arquitectura para balancear la carga bajo el estándar de CORBA y fueron evaluados contra otras estrategias que son bien conocidas en la literatura usando diferentes métricas de carga y mostramos como bajo ciertas condiciones nuestra estrategia obtiene mejores resultados.

  5. Sistemas de comunicaciones para vuelos no tripulados

    OpenAIRE

    Correa Vila, Alejandro

    2008-01-01

    La iniciativa ATLANTIDA engloba numerosos estudios de ingeniería con el objetivo de reformar el actual sistema de gestión del tráfico aéreo. Dentro de estos estudios se encuentran diversas investigaciones en el campo de las comunicaciones móviles. La gran variabilidad del entorno aeronáutico promueve el estudio de sistemas de comunicaciones móviles capaces de funcionar en este tipo de entorno. Este proyecto propone un sistema de comunicaciones WiMAX en un entorno aeronáutico con aviones no tr...

  6. El sistema acusatorio oral en Costa Rica

    OpenAIRE

    Hernández Barrantes, Jessica María; Rodríguez Montoya, Carmen María; Tenorio Jara

    2014-01-01

    El 1.° de enero de 1998 entra en vigencia el nuevo Código Procesal Penal, con lo cual se experimenta una de las reformas más importantes en materia de Administración de Justicia Penal, que implica el paso de un Sistema Procesal Inquisitivo a un Sistema Acusatorio que procura la adversarialidad entre partes. El antiguo Sistema Penal Inquisitivo se caracterizaba en que las funciones de investigar y juzgar se ejercían por el Juez de instrucción, el proceso era escrito y las dil...

  7. Sistemas de salvaguardia en reactores EPR

    OpenAIRE

    2015-01-01

    En este documento se describe brevemente el funcionamiento de los diversos sistemas de una planta nuclear operada con un reactor de tipo PWR. Más concretamente, el proyecto se centra en una descripción exhaustiva de los sistemas de salvaguardia y seguridad que regulan el funcionamiento de un reactor de tipo EPR, así como la central nuclear que contiene a dicho reactor. El proceso ha consistido en clasificar y resumir los distintos sistemas que operan en dicha planta, estudiando sus caracterís...

  8. Principales sistemas osmóticos orales

    OpenAIRE

    José Eduardo Hernández Torres; Luz María Melgoza Contreras

    2014-01-01

    Los sistemas de liberación convencionales tienen poco control sobre la liberación del fármaco, lo que resulta en concentraciones plasmáticas variables. Como consecuencia, se han desarrollado sistemas de liberación controlada, como los sistemas osmóticos que han demostrado ser independientes de las condiciones psiológicas del cuerpo (pH, alimento y movimientos peristálticos). La liberación del fármaco puede controlarse conociendo de antemano las propiedades psicoquímicas del fármaco y la forma...

  9. Sistemas de conciliación financiera

    OpenAIRE

    Cerro Campón, Ana

    2011-01-01

    Los sistemas de conciliaciones financieras, son sistemas que se basan en la carga de datos. Estos datos son extraídos previamente desde las aplicaciones propias de los movimientos bancarios. Esta información bancaria esta constituida en su mayoría por información sobre precios de distintos mercados. La finalidad de los sistemas de conciliación financiera es comprobar que todas las aplicaciones están alineadas, y que las operaciones realizadas con estos precios no se desvirtualizan de un siste...

  10. Elementos del sistema electoral del Congreso Mexicano

    OpenAIRE

    Aldo Medina García; Irina Cervantes Bravo

    2013-01-01

    El presente artículo es un estudio de los componentes del sistema electoral, diseñado por el legislador mexicano para integrar al parlamento federal. Estudio desarrollado a sabiendas de la importancia que reviste el sistema electoral como un medio que permite a los ciudadanos convertir su voto expresado en las urnas en escaños a favor de determinado candidato o partido. En dicho análisis tomamos en cuenta la evolución constitucional del sistema electoral mexicano, la participación de las fuer...

  11. Gestor de recursos sobre sistemas virtualizados

    OpenAIRE

    Gavilán García, Jesús Ruben

    2011-01-01

    Creacion, diseño e implementación de una nube (cloud) basado en un clúster de servidores con sistema de ficheros distribuido en red y virtualización de sistemas operativos que mejora la utilización de los recursos disponibles. Esta nueva arquitectura ofrece una nube privada que simplifica la gestión de los servicios y aporta una disminución del coste de mantenimiento, ademas de añadir flexibilidad, dinamismo y escalabilidad al sistema. Las tecnologías con las que se trabaja son GNU/Linux, Xen...

  12. Atributos químicos de um latossolo bruno sob sistema plantio direto em função da estratégia de adubação e do método de amostragem de solo Chemical properties of a haplohumox under no-tillage as related to fertilization strategies and soil sampling method

    Directory of Open Access Journals (Sweden)

    Volnei Pauletti

    2009-06-01

    Full Text Available Adubo em sulco de semeadura nem sempre aumenta a produtividade de culturas anuais, contudo aumenta a variabilidade química das áreas agrícolas, especialmente dos nutrientes P e K. Essa variabilidade é maior no sistema plantio direto por não haver homogeneização da camada superficial pelo preparo mecânico. Neste trabalho, avaliou-se, em um Latossolo Bruno, por longo período sob plantio direto, o efeito de estratégias de aplicação de adubo sobre a distribuição de alguns atributos químicos do solo em profundidade após três e seis anos do início do experimento e sobre a variação desses atributos em função de dois métodos de coleta de amostras de solo, com e sem inclusão da linha de semeadura. Foram feitos dez tratamentos, nove contemplando fontes de P (fosfato natural e superfosfato triplo - STP, mecanismos sulcadores (disco duplo e haste, formas (sulco e superfície e épocas (inverno e verão de aplicação de adubo de semeadura e um tratamento controle, sem adubação. Os atributos químicos do solo foram maiores nas camadas superficiais e sua distribuição em profundidade, com exceção do P, não foi alterada pelas estratégias de adubação. O teor de P foi menor na profundidade de 0-5 cm com o uso contínuo, por mais de três anos, do sulcador tipo haste e com a ausência de adubação. Com a inclusão da linha de semeadura na amostragem, foram observados maiores teores de K e Ca e maiores valores de CTC. Os métodos de coleta de amostras de solo, com e sem inclusão da linha de semeadura, e as profundidades de coleta 0-10 e 0-20 cm foram semelhantes quanto à interpretação dos resultados das análises para recomendação de adubação e calagem para áreas sob sistema plantio direto, por longo período.Fertilizer application in the sowing rows does not necessarily increase crop yields, but it does increase the variability of the soil chemical properties, particularly of the nutrients P and K. This variability is

  13. Effects of a diet integration with an oily emulsion of DHA-phospholipids containing melatonin and tryptophan in elderly patients suffering from mild cognitive impairment.

    Science.gov (United States)

    Rondanelli, Mariangela; Opizzi, Annalisa; Faliva, Milena; Mozzoni, Marco; Antoniello, Neldo; Cazzola, Roberta; Savarè, Rita; Cerutti, Renata; Grossi, Enzo; Cestaro, Benvenuto

    2012-03-01

    Age-related changes in nutritional status can play an important role in brain functioning. Specific nutrient deficiencies in the elderly may exacerbate pathological processes in the brain. Consequently, the potential of nutritional intervention to prevent or delay cognitive impairment and the development of dementia is an important topic. A randomized, double-blind, placebo-controlled trial has been performed in 25 elderly subjects (86 ± 6 years, 20 females, 5 males) with mild cognitive impairment (MCI). These subjects were randomly assigned to supplement their diet with either an oily emulsion of docosahexaenoic acid (DHA)-phospholipids containing melatonin and tryptophan (11 subjects) or a placebo (14-matched subjects) for 12 weeks. The main aim of this study was to evaluate the efficacy of the dietary supplement on cognition, by the assessment at the start and after 12 weeks of: (1) Orientation and other cognitive functions: Mini-Mental State Examination (MMSE); (2) Short-term memory: digit, verbal, and spatial span (digit span; verbal span; Corsi's test); (3) Long-term memory: Rey's auditory-verbal learning test; 'short story' test; Rey-Osterrieth complex figure (recall); (4) Attentional abilities: attentive matrices; (5) Executive functions: Weigl's sorting test; phonological fluency 'FAS'; (6) Visuo-constructional and visuo-spatial abilities: copy of simple drawings; Rey-Osterrieth complex figure (copy); (7) Language: semantic fluency; (8) Mood: Geriatric Depression Scale (GDS). Moreover, Sniffin' Sticks olfaction test and Mini Nutritional Assessment (MNA) have been performed. After 12 weeks, a significant treatment effect for the MMSE (P treatment effect was found out for the olfactory sensitivity assessment (P treatment the supplemented group showed an improvement in the MNA score with a significant difference relative to placebo (P Older adults with MCI had significant improvements in several measures of cognitive function when supplemented with an oily

  14. GPS: El sistema de posicionamiento global

    National Research Council Canada - National Science Library

    Juan Gilberto Serpas; Manuel Ramírez N; Franklin de Obaldía

    2016-01-01

    El Sistema de Posicionamiento Global (GPS, por sus siglas en inglés) se ha convertido, en la actualidad, en una herramienta invaluable para el posicionamiento de puntos sobre la superficie terrestre...

  15. Sistemas basados en conocimiento usando Prolog

    Directory of Open Access Journals (Sweden)

    Zenaida García Valdivia

    2011-10-01

    Full Text Available Se exponen algunos de los resultados alcanzados en la Universidad Central "Marta Abreu" de Las Villas en cuanto al uso de un lenguaje de Programación Lógica (Prolog en la elaboración de Sistemas Basados en Conocimiento para diferentes áreas del saber como son la medicina, soldadura, educación, sistemas eléctricos de potencia, entre otros. Todos los sistemas elaborados utilizan el paradigma de la programación lógica para la representación del conocimiento de los expertos en los temas en cuestión y además hacen uso de entornos agradables a los usuarios a través interfaces visuales elaboradas en ambientes de programación para súper lenguajes ó utilizan un conjunto de herramientas para la elaboración de sistemas sobre la Web

  16. El sistema presidencial mexicano. Actualidad y perspectivas

    OpenAIRE

    Diego VALADÉS

    2011-01-01

    Este ensayo presenta un análisis del sistema presidencial mexicano desde una perspectiva constitucional. Se hace especial referencia a la concentración del poder presidencial y a las relaciones entre el Congreso y el gobierno. Asimismo, se incluyen consideraciones comparativas entre los sistemas presidenciales estadounidense y mexicano. El concepto vertical del poder en México no ha sido modificado de manera significativa desde su versión original de 1917, por lo que se hacen ostensibles las ...

  17. 含油污泥燃料化处理剂研制及其作用机理研究%Development and mechanism study of an additive for fuelization of oily sludge

    Institute of Scientific and Technical Information of China (English)

    谢水祥; 陈勉; 蒋官澄; 李志勇; 邓皓; 王蓉沙

    2011-01-01

    含油污泥主要有清罐油泥(罐底泥)、隔油池底泥、污水处理厂浮渣以及剩余活性污泥等几类.含油污泥含有油、苯系物、酚类、蒽、芘等具有恶臭味和毒性的物质,是国家明文规定的危险废弃物.另一方面,含油污泥中富含大量烃类,潜在能量大,热值高,平均热值达5 000kcal/kg以上.经大量室内实验,开发了一种新型含油污泥燃料化处理剂,可处理多种类型的石油和石化行业含油污泥,能使含油污泥迅速破乳,脱去水后的泥渣彼此不粘连,不结块,干燥后的泥渣易于燃烧,还可与燃煤混烧.含油污泥干化物燃后灰渣及与燃煤混烧锅炉排放的烟气均满足我国相关排放标准要求,不会造成额外的环境影响,实现了含油污泥无害化处理与资源化再利用.%The oily sludge can be divided into oily sludge from tank clearing (sludge from oil tank) , sediment from oil separating tank, floating sludge from the wastewater treatment plants, residual activated sludge and so on. The oily sludge includes various malodorous and poisonous compositions such as oil, benzene series organic, phenol chemical, anthracene, and pyrene, which are all in the national list of hazardous wastes. On the other hand, the oily sludge is rich in different kinds of hydrocarbon, resulting in a large potential energy and a high calorific value (the average calorific value is more than 5 000 kcal/kg). Based on numerous lab experiments,a new additive for the fuelization of oily sludge was developed, which could deal with various kinds of oily sludge in the petroleum and petrochemical industry. The new additive can make the oily sludge demulsification fast and the dehydrated sludge nonadherent and nonlumping, which can burn easily or combust with fire coal. After burning,the ash of the dry oily sludge and the exhaust gas from the mix-combustion boiler both meet the requirement of related emission standards of our country, and the waste as

  18. Gerencia de sistemas conductuales y cambio organizacional

    Directory of Open Access Journals (Sweden)

    Guillermo E. Yáber

    1998-01-01

    Full Text Available La gerencia de sistemas conductuales es una tecnología basada en un enfoque científico para el análisis del comportamiento en sistemas humanos. Esta tecnología ayuda a las organizaciones a definir y lograr sus metas. Consiste en el análisis, especificación, diseño, implementación, evaluación y reciclaje de sistemas de motivación humana que optimizan el desempeño y desarrollo a nivel del sistema total, departamental e individual de la organización. Utiliza tres modelos: El diseño de sistemas dirigidos hacia la meta, el análisis de «Tres Contingencias» y la gerencia del desempeño para el cambio cultural. Este artículo incluye la descripción del marco teórico y metodológico de la gerencia de sistemas conductuales y su aplicación en las áreas de servicios y producción.

  19. Cogeneration Systems; Sistemas de Cogeneracion

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez M, Manuel F; Huante P, Liborio; Romo M, Cesar A [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2006-07-01

    The present article deals on relevant aspects on the subject of cogeneration within the Mexican territorial limits. In the first place it is presented the role of Mexico in terms of its cogeneration potential, the type of service that has obtained from this predominant modality of cogeneration for self-supplying, the most propitious sectors to develop it, its legislations on the matter, the projects made for the implementation of cogeneration plants, as well as the existing cogeneration schemes for its respective optimization proposals. Without leaving out the analysis on the different types of evaluation on the efficiency of cogeneration systems and the aspects to consider for the election of a generation cycle. [Spanish] El presente articulo trata sobre aspectos relevantes en materia de cogeneracion dentro de los limites territoriales de la nacion mexicana. Se muestra en primer lugar el papel de Mexico en terminos de su potencial de cogeneracion, el tipo de servicio que ha obtenido de esta predominantemente (modalidad de cogeneracion para autoabastecimiento), los sectores mas propicios para desarrollarla, sus legislaciones al respecto, los proyectos realizados para la implementacion de plantas de cogeneracion, asi como los esquemas de cogeneracion existentes con sus respectivas propuestas de optimizacion. Sin dejar de lado el analisis sobre los distintos tipos de evaluacion de la eficiencia de sistemas de cogeneracion y los aspectos a considerar para la eleccion de un ciclo de generacion.

  20. 罐底油泥特性分析及其除油处理工艺%Characteristics of Tank Bottom Oily Sludge and Its Oil-removing Treatment Process

    Institute of Scientific and Technical Information of China (English)

    张雷; 刘惠玲; 王丽杰

    2012-01-01

    通过研究罐底油泥的理化性质,开发了适于处理罐底油泥的系列工艺:先采用调质技术提高罐底油泥流动性;再采用超声破乳降低油泥稳定性,改善油泥分离性能;最后采用卧式离心机对油泥进行离心分离处理.在复合型清洗剂加入量为800 mg/L、超声温度为60℃、超声功率为12 kW、超声时间为25 min、离心温度为60℃、絮凝剂加入量为600 mg/L、离心机转速为2200 r/min的条件下,系统稳定运行9d,离心机出口泥中含油率低于2.00%,水中悬浮固体质量浓度低于170 mg/L,达到了对罐底油泥进行除油的目的.%Based on the research of physical and chemical properties of tank bottom oily sludge, a series of processes for tank bottom oily sludge treatment were developed as follows: first, improving the fluidity of tank bottom oily sludge by conditioning technology; second, reducing the oily sludge stability and improving the sludge separation property by ultrasonic demulsification; Finally, separating oil and water from the oily sludge by horizontal centrifuge. Under the conditions of composite cleaning agent dosage 800 mg/L, ultrasonic temperature 60 ℃, ultrasonic power 12 kW, ultrasonic time 25 min, centrifugalization temperature 60 ℃ , flocculant dosage 600 mg/L, rotational speed 2 200 r/min and running time 9 d, the oil content of the sludge of the centrifuge export is less than 2.00%, the SS in the outlet water is less than 170 mg/L, and the purpose of oil-removal of the tank bottom oily sludge is achieved.

  1. Regulación neuroendocrina del sistema inmune

    OpenAIRE

    Caballero Hernández, Diana; Tamez Guerra, Reyes S.; RODRÍGUEZ PADILLA, CRISTINA; Tamez Guerra, Patricia; Weber, Richard J.; GÓMEZ FLORES, RICARDO

    2001-01-01

    El sistema inmune recibe señales del sistema nervioso central (cerebro) vía el sistema nervioso autónomo y el sistema endocrino. El sistema inmune, a su vez, envía información al cerebro vía citocinas. Este sistema de retroalimentación es vital para el funcionamiento adecuado del organismo en situaciones normales, y en aquellas en las que la homeostasis se ve perturbada, como en casos de estrés, consumo de drogas (terapéuticas o de abuso), enfermedades infecciosas y...

  2. Sistemas de control reseteado discretos : aplicaciones a control en red

    OpenAIRE

    Pérez Rubio, Félix

    2012-01-01

    Esta tesis presenta un estudio de los sistemas de control reseteados en tiempo discreto y su aplicación a los sistemas de control en red. Se da una formulación formal que es coherente con las formulaciones de sistemas de control reseteados continuos. Para ello se emplean elementos de sistemas impulsivos y sistemas conmutados. En este trabajo se aborda la estabilidad de los sistemas reseteados en tiempo discreto empleando técnicas de regularización temporal y también técnicas de anál...

  3. Synthesis and chemical modification of polymeric resins for the treatment of cations and aromatic hydrocarbons in produced oily water; Sintese de modificacao quimica de resina polimerica e aplicacao na remocao de cations e hidrocarbonetos aromaticos presentes em agua produzida

    Energy Technology Data Exchange (ETDEWEB)

    Aversa, Thiago M.; Rodrigues, Monique F.; Vieira, Helida V.P.; Queiros, Yure G.C.; Lucas, Elizabete F. [Universidade Federal do Rio de Janeiro, Instituto de Macromoleculas, Lab. de Macromoleculas e Coloides na Industria do Petroleo, Rio de Janeiro, RJ (Brazil)], e-mail: thiagoaversa@ima.ufrj.br

    2011-07-01

    The use of chemically modified resins in oily water treatment process is not very developed yet. Because of this, this work suggests to study the styrene and divinylbenzene sulfonation effect on oil and grease, aniline and calcium removal from the water. The aniline, oils and greases belong to a class of toxic organic compounds, with the Brazilian maximum limits established for disposal in CONAMA 393/2007, while the calcium ions belong to the group of cations of alkaline earth metals which improve hardness to the water, may cause fouling as carbonates and sulfates form. By using sulfonated resins in oily water treatment it is possible to remove not only oils and greases but also calcium and aniline. These kinds of polar compounds are removed because of the cation exchange capacity of resin. (author)

  4. Improving Middle School Quality in Poor Countries: Evidence from the Honduran "Sistema De Aprendizaje Tutorial"

    Science.gov (United States)

    McEwan, Patrick J.; Murphy-Graham, Erin; Torres Irribarra, David; Aguilar, Claudia; Rápalo, Renán

    2015-01-01

    This article evaluates the impact and cost-effectiveness of offering an innovative middle school model--the Sistema de Aprendizaje Tutorial (SAT)--to Honduran villages instead of traditional middle schools. We identified a matched sample of villages with either type of school and collected baseline data among primary school graduates eligible to…

  5. Improving Middle School Quality in Poor Countries: Evidence from the Honduran "Sistema De Aprendizaje Tutorial"

    Science.gov (United States)

    McEwan, Patrick J.; Murphy-Graham, Erin; Torres Irribarra, David; Aguilar, Claudia; Rápalo, Renán

    2015-01-01

    This article evaluates the impact and cost-effectiveness of offering an innovative middle school model--the Sistema de Aprendizaje Tutorial (SAT)--to Honduran villages instead of traditional middle schools. We identified a matched sample of villages with either type of school and collected baseline data among primary school graduates eligible to…

  6. Sistemas territoriales de salud frente al sistema general de seguridad social en salud de Colombia

    Directory of Open Access Journals (Sweden)

    Jahir Alexander Gutiérrez Ossa

    2014-06-01

    Full Text Available Introducción: El artículo expone los elementos y fundamentos que podrían avalar la generación de sistemas de seguridad social en salud territorial, en complementación con el sistema general preexistente. Materiales y Métodos: La eclosión generalizada en los sistemas de salud, implica la revisión de los modelos propuestos de carácter central y territorial. El análisis económico institucional, permite analizar las condiciones que tienen los sistemas generales para impactar en los esquemas territoriales. Resultados: Es el momento preciso, para que el sistema general en Colombia responda efectivamente en la materia, y que tanto ello, podría dar cuenta de la capacidad sistémica del mismo en el escenario territorial. Discusión: Es importante, que las gobernaciones y municipios planteen el alcance de dicha iniciativa. El Sistema General de Seguridad Social en Salud en Colombia, gira en torno a modelos y no a la concepción de sistema de salud efectivamente. Conclusiones: La definición de sistema de salud está opacando la atención para definir lo que implica efectivamente la salud, independiente de cualquier sistema al que se pretenda apuntar al final. Palabras clave: Cobertura de Servicios Públicos de Salud, Evaluación en Salud, Sistemas Multiinstitucionales, Sistemas Nacionales de Salud, Políticas Públicas de Salud. (Fuente: DeCS BIREME. Cómo citar este artículo: Gutiérrez Ossa JA, Restrepo Avendaño RD. Sistemas territoriales de salud frente al sistema general de seguridad social en salud de Colombia. Rev Cuid. 2014; 5(1: 623-32.

  7. Present Situation and Prospects of Floatation Technique in Purification of Oily Waste Water%含油废水气浮技术的应用现状及展望

    Institute of Scientific and Technical Information of China (English)

    涂华; 余录; 周锡兰

    2012-01-01

    Several main floatation technique was introduced, and the factors effecting floatation result are analyzed. The prospect of floatation technique in purification oily waste water was described.%介绍应用于含油废水的几种气浮技术,分析了影响气浮效果的主要因素,并对气浮在含油废水处理中的应用进行了展望。

  8. Review of harmless treatment of oily sludge in petroleum and petrochemical industry%石油石化行业含油污泥无害化处理技术综述

    Institute of Scientific and Technical Information of China (English)

    金喆

    2015-01-01

    介绍了国内外常用的含油污泥无害化处理技术,以及各项技术的原理和特点,并展望了未来含油污泥无害化处理技术的发展方向。%This paper describes the harmless treatment of oily sludge with respect to the principles and characteristics of the technology along with its future development direction.

  9. 萃取法在火电厂含油废水处理中的应用%APPLICATION OF EXTRACTION METHOD IN TREATMENT OF OILY WASTE WATER IN THERMAL POWER PLANT

    Institute of Scientific and Technical Information of China (English)

    陈文中; 付强

    2009-01-01

    Directing against the charactors of oily waste water in Zhanjiang Orimulsion Oil Fired Power Plant,through test,it is finally determined to use extraction wethod for treatment of the oily waste wa-ter. The treatment system and technological process for oily waste water in Zhanjiang Orimulsion Oil Fired Power Plant have been presented. The extractant selected for said technology is diesel oil no. 1, supplementing with a specially prepared additive,and adopting BZH type treatment equipment for oily waste water. Under condition that the concentration of common mineral oil is equal to or less than 10%,or the concentration of orimulsion oil is equal to or less than 5 g/L,the waste water after treat-ment can attain the required standard for dischaging.%针对湛江奥里油电厂含油废水的特性,通过试验最终确定采用萃取法对其进行处理.介绍了湛江奥里油发电厂含油废水处理系统及工艺流程,该工艺所选萃取剂为0号柴油,辅以专配添加剂,采用BZH型含油废水处理设备.在含油废水中普通矿物油浓度小于或等于10%及奥里油浓度小于或等于5 g/L时,处理后的废水可达标排放.

  10. 絮凝-微纳气泡法处理采油废水%Treatment of oily wastewater using coagulation/nano microbubble technology

    Institute of Scientific and Technical Information of China (English)

    巩翠玉; 杜娜; 侯万国

    2012-01-01

    The oily wastewater from Shengli Oilfield was treated by polyferric silicate sulfate(PFSS) flocculation,nano-microbubble technology and coagulation/nano-microbubble combined technology.The effects of treatment process on the quality of oily wastewater and the viscosity of polymer solution(partially hydrolyzed polyacrylaminde) prepared from treated wastewater were investigated.It demonstrated that the salinity,concentration of oil and suspended substance were reduced effectively after these treatments,meanwhile,the viscosity of polymer solution increased significantly.In particular,the coagulation/nano-microbubble combined technology has more remarkable effect on the studied system than the other two methods.It should be noted that the treated wastewater is expected to replace the fresh water used for preparation of polymer flooding system.Herein,it is not only eliminating oil pollution in the water,but also saving freshwater resources.%对采自胜利油田的采油废水,分别进行了聚硅硫酸铁(PFSS)絮凝法、微纳气泡法和絮凝-微纳气泡联合法处理,考察了处理过程对采油废水水质和所配制聚合物(部分水解聚丙烯酰胺)溶液粘度的影响。结果表明,均可有效降低废水的矿化度、油含量和悬浮物含量,明显提高用其配制的聚合物溶液的粘度;联合处理效果明显高于单独采用絮凝或微纳气泡处理的效果。所处理后的废水可有望代替淡水用于油田现场配制聚合物驱油体系,在消除油田污水环境污染的同时,可节约淡水资源。

  11. Microencapsulación de sustancias oleosas mediante secado por aspersión Microencapsulation of oily substances by aspersion drying

    Directory of Open Access Journals (Sweden)

    Orestes Darío López Hernández

    2010-09-01

    Full Text Available Para administrar por vía oral compuestos oleosos como los extractos lipídicos de origen natural, los aceites esenciales volátiles y las vitaminas liposolubles, se hace necesario presentarlos en forma de cápsulas blandas. Una alternativa a esta forma de presentación es la microencapsulación, que ofrece una solución para modificar el estado físico y presentarlos en una forma sólida para su administración por vía oral. Esta alternativa permite enmascarar el olor y sabor desagradable de productos que van a ser administrados por vía oral, además de proteger de la oxidación a los ácidos grasos presentes. El secado por aspersión es uno de los métodos más utilizados a escala industrial para la obtención de microcápsulas. Debido a su creciente uso en la industria farmacéutica, en el presente trabajo se recopila el estado del arte en el uso de esta tecnología para la microencapsulación de sustancias oleosas.To administer oral oily compounds such as lipid extracts of natural origin, volatile essential oils and liposoluble vitamins, it is necessary that presentation be in soft capsulae. An alternative to this form of presentation is the microencapsulation being a solution to modify the physical state and to achieve a solid form for its oral administration. This alternative allows masking the smell and the unpleasant flavor of oral products ant also to protect the oxidation of fatty acids present. The aspersion dry is one of the more used methods at industrial scale to microcapsulae achievement. Because of its increasing use in pharmaceutical industry in present paper is gathered the art of state in the use of this technology for oily substances microencapsulation.

  12. SCODA para el Desarrollo de Sistemas Multiagente

    Directory of Open Access Journals (Sweden)

    Jesús A. Román

    2011-12-01

    Full Text Available El planteamiento de implementar sistemas multiagente de forma que puedan reutilizarse con distintos objetivos, dota a los desarrolladores de una metodología más eficaz en sus fines. Este artículo presenta SCODA, una arquitectura basada en cinco principios: estandaridad, especialización, facilidad de implementación, reutilización y computación distribuida. SCODA pretende facilitar el desarrollo de sistemas multiagente, basándose en el concepto de pequeños grupos de agentes denominados Comunidades Inteligentes Especializadas (CIE. Las CIE cuentan con funcionalidades específicas que permiten llevar a cabo la implementación de sistemas multiagente de forma escalable, dentro del marco de SCODA, pudiendo ser reutilizadas en diversos desarrollos.

  13. Contexto General de los Sistemas Agrarios

    Directory of Open Access Journals (Sweden)

    Vélez Escobar Norberto

    1989-12-01

    Full Text Available Esta ponencia introdujo y delimitó el campo de trabajo para el panel: Formas o Sistemas de Producción Agraria. En ella se presentó y discutió la definición del concepto de FORMA DE PRODUCCION e igualmente planteó la taxonomía más general o "agrupamientos" de los sistemas de producción agraria en Colombia. Se identificaron cinco grupos de formas, en proceso de estructuración, empresariales, campesinas, de economía natural y experimentales; y a continuación se caracterizó y explicó cada uno de los cinco agrupamientos. La ponencia terminó sustentando la validez del trabajo académico basado en el enfoque de sistemas y presentó la evolución reciente de esta forma de trabajo en la Universidad Nacional, Seccional Medellín.

  14. Psiconeuroinmunología: Conexiones entre sistema nervioso y sistema inmune

    Directory of Open Access Journals (Sweden)

    García López, Luis Joaquín

    2008-09-01

    Full Text Available La psiconeuroinmunología es una nueva parcela de la ciencia que apenas lleva tres décadas, pero que en los últimos años ha sido objeto de una enorme atención por diversos grupos de investigación. El articulo pretende exponer brevemente cómo están organizados los sistemas inmune y neuroendocrino, para después presentar los hallazgos que hasta el momento intentan dar explicación de las relaciones entre ambos con el sistema nervioso, así como las influencias de unos sobre otros, más concretamente expresar la relación entre los tres sistemas responsables de la defensa del organismo y, más ampliamente, de su mantenimiento homeostático. Cuando se trata de amenazas, el sistema nervioso central tiene que decidir qué sistema se pone en marcha, el sistema de estrés como energía para el ataque o la huida (un animal que nos quiere atacar, el sistema inmune para neutralizar el antígeno (un virus que nos quiere atacar o ambos (la energía es necesaria también para el sistema inmune. Como parece ser que en muchas ocasiones la depresión aparece tras los esfuerzos infructuosos de puesta en marcha de estrategias de afrontamiento, también hemos repasado sucintamente algunas investigaciones que relacionan al sistema inmune con la depresión, así como con los trastornos del sueño. Se finaliza con las aportaciones que la psicología puede ofrecer a nivel terapéutico.

  15. Sistema de salud de México

    OpenAIRE

    Octavio Gómez Dantés; Sergio Sesma; Victor M. Becerril; Felicia M. Knaul; Héctor Arreola; Julio Frenk

    2011-01-01

    En este trabajo se describe el sistema mexicano de salud. En la primera parte se discuten las condiciones de salud de la población mexicana, con énfasis en los padecimientos emergentes que constituyen las principales causas de muerte, diabetes, enfermedades isquémicas del corazón, padecimientos cerebrovasculares y cáncer. En la segunda parte se describe la estructura básica del sistema, las instituciones que lo conforman, la población a la que cubre, los beneficios que reciben los afiliados d...

  16. Ortogonalidad y capacidad en sistemas MIMO masivo

    OpenAIRE

    Romero Ibáñez, Irene

    2014-01-01

    La tecnología MIMO constituye un antes y un después en los sistemas de comunicaciones inalámbricas. Esta tecnología ofrece multitud de beneficios que nos acercan a cumplir con los desafíos impuestos por las limitaciones en un canal inalámbrico así como por las restricciones de nuestros recursos o el espacio físico ocupado por las antenas, entre otros. Además de explotar tanto la dimensión temporal como la frecuencial en sistemas inalámbricos convencionales con una única antena, las posibilida...

  17. As unidades fundamentais do sistema internacional (SI)

    OpenAIRE

    2002-01-01

    Nos últimos anos de docência no Instituto Superior de Engenharia de Lisboa, redigimos, para uso dos alunos, um pequeno memorando sobre as unidades fundamentais do Sistema Internacional - as unidade de base -, tendo em vista, principalmente, a correção da escrita das ditas unidades, seus múltiplos e seus submúltiplos. Esse escasso conjunto de menos de meia dúzia de páginas foi sendo gradualmente alargado, de forma a incluir referência aos sistemas de unidades primitivos e sua evolução, como ta...

  18. Sistema de salud de Perú

    OpenAIRE

    2011-01-01

    En este trabajo se describen las condiciones generales de salud de la población peruana y, con mayor detalle, el sistema peruano de salud: su estructura y cobertura, sus fuentes de financiamiento, los recursos físicos, materiales y humanos con los que cuenta, y las actividades de rectoría que en él se desarrollan. Asimismo se discute el estado en el que se encuentran la generación de información y la investigación, y la participación de los ciudadanos en la gestión y evaluación del sistema. E...

  19. Algoritmos array para filtragem de sistemas lineares

    OpenAIRE

    Gildson Queiroz de Jesus

    2007-01-01

    Esta dissertação desenvolve filtro de informação, algoritmos array para estimador do erro médio mínimo quadrático para sistemas lineares sujeitos a saltos Markovianos e algoritmos array rápidos para filtragem de sistemas singulares convencionais. Exemplos numéricos serão apresentados para mostrarem as vantagens dos algoritmos array deduzidos. Parte dos resultados obtidos nesta pesquisa serão publicados no seguinte artigo: Terra et al. (2007). Terra, M. H., Ishihara, J. Y. and Jesus, G. Q. (20...

  20. Comprensión de sistemas paralelos

    OpenAIRE

    Perez, Norma; Berón, Mario; Henriques, Pedro; Pereira, Maria João

    2015-01-01

    Las Tecnologías de la Información y la Comunicación (TIC’s) ofrecen servicios sorprendentes, que proporcionan acceso permanente a todo tipo de información y aplicaciones que se encuentran alrededor del mundo. En particular, los sistemas paralelos son buenos ejemplos de los paradigmas emergentes que deben ser considerados por científicos que se desempeñan en el campo informático. Estos sistemas plantean actividades críticas (sincronización, comunicación, etc.) que repercuten en la efi...

  1. Caos e simetrias em sistemas quanticos

    OpenAIRE

    Righi, Assis Francisco Moro

    1989-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias Fisicas e Matematicas Neste trabalho são investigadas algumas propriedades espectrais de dois sistemas quânticos não separáveis: o hamiltoniano de Henon-Heiles e o oscilador harmônico bidimensional com perturbação sugerida por Pullen e Edmonds do tipo x2y2. Foi confirmado que estes sistemas apresentam uma transição do comportamento quântico regular para o comportamento quântico irregular, também chamado caó...

  2. Sistemas dinámicos planos

    OpenAIRE

    Torres Henao, Jorge Alberto

    2013-01-01

    Resumen: En el documento se hace una presentación de los sistemas dinámicos planos, en particular los continuos provenientes de ecuaciones diferenciales ordinarias de segundo orden o de sistemas de ecuaciones diferenciales simultáneas de primer orden. Se introduce la teoría con ejemplos cuidadosamente seleccionados que hacen especial énfasis en las propiedades tipológicas de las soluciones y se dedica toda una sección a la obtención de una demostración del Teorema de Poincaré-Bendixson. La pa...

  3. El Derecho Administrativo del Sistema Comunitario Andino

    Directory of Open Access Journals (Sweden)

    Jorge Enrique Santos Rodríguez

    2013-12-01

    Full Text Available Una de las tendencias contemporáneas del Derecho Administrativo es el reconocimiento de su existencia más allá de las fronteras de un Estado. Bajo esa premisa, se busca demostrar que en la Comunidad Andina de Naciones se configuran los elementos suficientes para afirmar que existe un Derecho Administrativo Comunitario Andino, en la medida en que de las normas andinas se desprende la existencia de una función administrativa andina, una organización administrativa al seno del Sistema Andino de Integración, un sistema de fuentes administrativas andina y un contencioso administrativo comunitario.

  4. Herramientas de simulacion para sistemas fotovoltaicos en ingenieria

    National Research Council Canada - National Science Library

    Silvestre, S; Castaner, L; D. Guasch

    2008-01-01

    Este trabajo presenta la simulacion de un sistema fotovoltaico, basado en el entorno abierto de programacion Matlab/Simulink, utilizado en la asignatura Sistemas Fotovoltaicos, dictado en un programa...

  5. Modelos exactamente solubles en mecanica estadistica de sistemas de Coulomb

    National Research Council Canada - National Science Library

    Tellez, Gabriel

    2013-01-01

    Se presenta una revision de modelos exactamente solubles de fisica estadistica clasica en dos dimensiones de sistemas de Coulomb, que son sistemas compuestos por un gran numero de particulas cargadas electricamente...

  6. El sistema linfático: el gran olvidado del sistema circulatorio.

    OpenAIRE

    Olmos Martínez, Susana; Gavidia Catalán, Valentín

    2014-01-01

    En el presente artículo se analizan los modelos mentales y las concepciones alternativas que tienen los estudiantes de distintos niveles educativos sobre el sistema linfático como componente del sistema circulatorio. Se establece una relación con las dificultades que se salvaron a lo largo de la historia en la adquisición de dichos conocimientos. Los resultados muestran una deficiente relación entre los sistemas linfáticos y sanguíneos, una falta de conocimientos tanto anatómicos como fisioló...

  7. El sistema linfático: el gran olvidado del sistema circulatorio

    OpenAIRE

    2014-01-01

    En el presente artículo se analizan los modelos mentales y las concepciones alternativas que tienen los estudiantes de distintos niveles educativos sobre el sistema linfático como componente del sistema circulatorio. Se establece una relación con las dificultades que se salvaron a lo largo de la historia en la adquisición de dichos conocimientos. Los resultados muestran una deficiente relación entre los sistemas linfáticos y sanguíneos, una falta de conocimientos tanto anatómicos ...

  8. Development of a sublation system in atmospheric tank using sunflower oil surfactant to reduce oily water concentration; Desenvolvimento de um sistema de sublacao em tanque atmosferico utilizando tensoativo de oleo de girassol para reducao da concentracao de aguas oleosas

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Rodrigo F. de; Dantas, Iuri A.C.; Quintaes, Filipe de O.; Salazar, Andres O.; Barros Neto, Eduardo L. de [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2008-07-01

    In order to reduce the rate of oil in water, was developed a system capable to be inserted in a tank and make air bubbles move to top of the tank, where is a layer of oil, similar that occurs in flotation, but in this case is called sublation. This system is composed by drilled PVC pipes and connected in way of four identical squares, joined by a high pressure hose. A compressor located in a region near to the tank supplies air to the system through the hose, that is connected in the central point of the system. The preliminary results had shown that the concentration after the sublation, without the surfactants use, decrease of 70 ppm to 35 ppm. After the sublation using surfactants this concentration decrease of 70ppm to 24,8 ppm. The efficiency of the sublation process using surfactants made of vegetal oil - OGS - was proved by the experimental results. This process, beyond allowing a bigger reutilization of the water in the tests of the laboratory, makes possible the reduction of the rate of oil in water to permitted levels by CONAMA. (author)

  9. Development of a sublation system in atmospheric tank using sunflower oil surfactant to reduce oily water concentration; Desenvolvimento de um sistema de sublacao em tanque atmosferico utilizando tensoativo de oleo de girassol para reducao da concentracao de aguas oleosas

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Rodrigo F. de; Dantas, Iuri A.C.; Quintaes, Filipe de O.; Salazar, Andres O.; Barros Neto, Eduardo L. de [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2008-07-01

    In order to reduce the rate of oil in water, was developed a system capable to be inserted in a tank and make air bubbles move to top of the tank, where is a layer of oil, similar that occurs in flotation, but in this case is called sublation. This system is composed by drilled PVC pipes and connected in way of four identical squares, joined by a high pressure hose. A compressor located in a region near to the tank supplies air to the system through the hose, that is connected in the central point of the system. The preliminary results had shown that the concentration after the sublation, without the surfactants use, decrease of 70 ppm to 35 ppm. After the sublation using surfactants this concentration decrease of 70ppm to 24,8 ppm. The efficiency of the sublation process using surfactants made of vegetal oil - OGS - was proved by the experimental results. This process, beyond allowing a bigger reutilization of the water in the tests of the laboratory, makes possible the reduction of the rate of oil in water to permitted levels by CONAMA. (author)

  10. Estabilización robusta de sistemas lineales

    Directory of Open Access Journals (Sweden)

    Horacio Leyva Castellanos

    2013-12-01

    Full Text Available En este trabajo se muestra un conjunto de resultados que permiten abordar el problema de la estabilización robusta de una familia de sistemas lineales positivos. Se describen dos nuevas aplicaciones en la teoría de control positivo para sistemas compartimentales y se muestra la aplicación de un teorema de robustez para tales sistemas

  11. Sistemas territoriales de salud frente al sistema general de seguridad social en salud de Colombia

    OpenAIRE

    2014-01-01

    Introducción: El artículo expone los elementos y fundamentos que podrían avalar la generación de sistemas de seguridad social en salud territorial, en complementación con el sistema general preexistente. Materiales y Métodos: La eclosión generalizada en los sistemas de salud, implica la revisión de los modelos propuestos de carácter central y territorial. El análisis económico institucional, permite analizar las condiciones que tienen los sistemas generales para impactar en los esquemas terri...

  12. El Sistema and American Music Education

    Science.gov (United States)

    Lesniak, Melissa

    2012-01-01

    The brainchild of Jose Antonio Abreu, El Sistema, a music education program for aspiring orchestra musicians launched in Venezuela for students of limited means and now spreading to other parts of the world, has become a subject of interest to music teachers and teacher educators in North America. This article examines a bit of the program's…

  13. El Sistema and American Music Education

    Science.gov (United States)

    Lesniak, Melissa

    2012-01-01

    The brainchild of Jose Antonio Abreu, El Sistema, a music education program for aspiring orchestra musicians launched in Venezuela for students of limited means and now spreading to other parts of the world, has become a subject of interest to music teachers and teacher educators in North America. This article examines a bit of the program's…

  14. Elementos del sistema electoral del Congreso Mexicano

    Directory of Open Access Journals (Sweden)

    Aldo Medina García

    2013-08-01

    Full Text Available El presente artículo es un estudio de los componentes del sistema electoral, diseñado por el legislador mexicano para integrar al parlamento federal. Estudio desarrollado a sabiendas de la importancia que reviste el sistema electoral como un medio que permite a los ciudadanos convertir su voto expresado en las urnas en escaños a favor de determinado candidato o partido. En dicho análisis tomamos en cuenta la evolución constitucional del sistema electoral mexicano, la participación de las fuerzas minoritarias en la integración del Senado y de la Cámara de Diputados, la división que se hace del territorio en circunscripciones electorales, la barrera electoral que se fija a los partidos políticos para acceder a la representación en el Parlamento, la fórmula de asignación que se aplica a la votación obtenida, para finalmente concluir que el sistema electoral mexicano es esencialmente mayoritario aun cuando se vista de proporcional.

  15. Sistema de Reinscripciones Vía Internet

    Directory of Open Access Journals (Sweden)

    Bertha Alicia Góngora Serna

    2005-01-01

    Full Text Available Este Proyecto se enfoca al diseño de una página Web para optimizar el sistema de reinscripciones del Instituto Tecnológico de Aguascalientes (ITA, la cual permite que los alumnos utilicen menos tiempo en el proceso de inscripción, además de facilitar que dicha actividad se pueda realizar desde su hogar. Para la elaboración de este proyecto se requirió de Tecnologías web como HTML, JavaScript y JSP. La información necesaria fue reutilizada de los datos que actualmente genera el sistema de reinscripciones. La investigación que se llevó a cabo para sustentar este proyecto indaga desde la historia del Internet, una explicación breve de las tecnologías Web requeridas, algunos sistemas de reinscripciones de diferentes escuelas de nivel superior del país, así como el funcionamiento básico del sistema actual de reinscripciones del ITA

  16. Elementos del sistema electoral del Congreso Mexicano

    Directory of Open Access Journals (Sweden)

    Aldo Medina García

    2013-07-01

    Full Text Available El presente artículo es un estudio de los componentes del sistema electoral, diseñado por el legislador mexicano para integrar al parlamento federal. Estudio desarrollado a sabiendas de la importancia que reviste el sistema electoral como un medio que permite a los ciudadanos convertir su voto expresado en las urnas en escaños a favor de determinado candidato o partido. En dicho análisis tomamos en cuenta la evolución constitucional del sistema electoral mexicano, la participación de las fuerzas minoritarias en la integración del Senado y de la Cámara de Diputados, la división que se hace del territorio en circunscripciones electorales, la barrera electoral que se fija a los partidos políticos para acceder a la representación en el Parlamento, la fórmula de asignación que se aplica a la votación obtenida, para finalmente concluir que el sistema electoral mexicano es esencialmente mayoritario aun cuando se vista de proporcional.

  17. ENEA presenta sistema ADS per trattamento scorie

    CERN Multimedia

    2002-01-01

    "Arriva il sistema Ads (Accelerator driven system) per il trattamento dei rifiuti radioattivi. Lo studio di fattibilita' per l' innovativa tecnologia, realizzato da un gruppo di lavoro congiunto Enea, Cea, Cern e Ansaldo, e' stato presentato oggi nel corso di un workshop presieduto dal premio Nobel per la fisica, Carlo Rubbia" (1/2 page).

  18. Hacia un sistema de indicadores sociales

    OpenAIRE

    Rob Vos

    1996-01-01

    El presente documento propone un Sistema de Indicadores Sociales (SIS) que facilite el análisis de las dimensiones, naturaleza y causas de la pobreza y desigualdad en América Latina y la vigilancia y monitoreo del impacto de las políticas económicas y sociales.

  19. Sistemas ultrasónicos para la irrigación del sistema de conductos radiculares

    Directory of Open Access Journals (Sweden)

    A. García Delgado

    2014-04-01

    Full Text Available La eliminación de los restos de tejido pulpar vital y necrótico y de los microorganismos del sistema de conductos radiculares, es esencial para el éxito en endodoncia. La desinfección del canal radicular mediante la irrigación e instrumentación es el factor más importante en la prevención y tratamiento de la periodontitis apical. Al ser imposible con la instrumentación llegar a todas las áreas del sistema de conductos, la irrigación cobra especial importancia. Por este motivo, en la última década se han desarrollado una serie de sistemas de dispensación y agitación de irrigantes, tales como los ultrasonidos. En concreto, en este artículo de revisión se evalúa la información disponible de los diez últimos años sobre la efectividad de los sistemas ultrasónicos para eliminar bacterias, tejido pulpar, restos de dentina y barrillo dentinario, la capacidad de estos dispositivos para hacer que el irrigante penetre en el sistema de conductos radiculares y la seguridad en su uso. Los resultados de la revisión muestran que los sistemas ultrasónicos son más eficaces en el desbridamiento químico, biológico y físico del sistema de conductos radiculares que los sistemas de irrigación convencional, a la vez que son seguros.

  20. Sistemas de Cultivo de la Papa en Antioquia

    Directory of Open Access Journals (Sweden)

    Arango U. Ernesto

    1948-04-01

    Full Text Available Existen tres sistemas de cultivo entre los que se encuentran el sistema de tapado, sistema de destapado y el sistema de cepillado. Es necesario aclarar que la mayor utilidad que se obtiene con el sistema de cepillado sobre el de destapado, no compensa las pérdidas del suelo, puesto que este queda inutilizado por mucho tiempo, siendo necesario abandonarlo por varios años, antes de volver a lograr una cosecha remuneradora. Además se obtienen cosechas de papa demasiado bajas lo que merma considerablemente los rendimientos de la zona.

  1. Sistema de inferencia difusa basado en relaciones Booleanas

    Directory of Open Access Journals (Sweden)

    Helbert Eduardo Espitia Cuchango

    2010-09-01

    Full Text Available Este documento describe la estructura de un sistema de inferencia difusa basado en relaciones booleanas. La teoría relacionada con lógica y conjuntos booleanos es una buena herramienta para el diseño de automatismos y sistemas digitales. Una variación con la cual se busca mejorar los sistemas basados en automatismos consiste en emplear conjuntos difusos en lugar de booleanos. Lo anterior se realiza con el objetivo de tener una acción continua en el actuador del automatismo. Al realizar esta variación y al aplicar la metodología de diseño de los sistemas de automatismos, aparecen los sistemas de inferencia difusa basados en relaciones booleanas.Aunque inicialmente esta propuesta se realizó considerando sistemas de automatismos, se observa que es posible extenderla a sistemas de inferencia difusa.

  2. Diversity and efficiency of bradyrhizobium strains isolated from soil samples collected from around sesbania virgata roots using cowpea as trap species Diversidade e eficiência simbiótica de estirpes de bradyrhizobium capturadas próximo ao sistema radicular de sesbania virgata usando caupi como planta-isca

    Directory of Open Access Journals (Sweden)

    Ligiane Aparecida Florentino

    2010-08-01

    Full Text Available The genetic diversity of ten Bradyrhizobium strains was evaluated for tolerance to high temperatures, to different salinity levels and for the efficiency of symbiosis with cowpea plants (Vigna unguiculata (L. Walp.. Eight of these strains were isolated from nodules that appeared on cowpea after inoculation with suspensions of soil sampled from around the root system of Sesbania virgata (wand riverhemp in ecosystems of South Minas Gerais. The other two strains used in our analyses as references, were from the Amazon and are currently recommended as cowpea inoculants. Genetic diversity was analyzed by amplifying repetitive DNA elements with the BOX primer, revealing high genetic diversity with each strain presenting a unique band profile. Leonard jar assays showed that the strains UFLA 03-30 and UFLA 03-38 had the highest N2-fixing potentials in symbiosis with cowpea. These strains had more shoot and nodule dry matter, more shoot N accumulation, and a higher relative efficiency than the strains recommended as inoculants. All strains grew in media of pH levels ranging from 4.0 to 9.0. The strains with the highest N2-fixing efficiencies in symbiosis with cowpea were also tolerant to the greatest number of antibiotics. However, these strains also had the lowest tolerance to high salt concentrations. All strains, with the exceptions of UFLA 03-84 and UFLA 03-37, tolerated temperatures of up to 40 ºC. The genetic and phenotypic characteristics of the eight strains isolated from soils of the same region were highly variable, as well as their symbiotic efficiencies, despite their common origin. This variability highlights the importance of including these tests in the selection of cowpea inoculant strains.Dez estirpes de rizóbios, sendo oito isoladas de amostras de solos coletadas próximo ao sistema radicular de Sesbania virgata, no Sul de Minas Gerais, e duas recomendadas como inoculante para o caupi (Vigna unguiculata (L. Walp. usadas como refer

  3. Treatability studies on different refinery wastewater samples using high-throughput microbial electrolysis cells (MECs)

    KAUST Repository

    Ren, Lijiao

    2013-05-01

    High-throughput microbial electrolysis cells (MECs) were used to perform treatability studies on many different refinery wastewater samples all having appreciably different characteristics, which resulted in large differences in current generation. A de-oiled refinery wastewater sample from one site (DOW1) produced the best results, with 2.1±0.2A/m2 (maximum current density), 79% chemical oxygen demand removal, and 82% headspace biological oxygen demand removal. These results were similar to those obtained using domestic wastewater. Two other de-oiled refinery wastewater samples also showed good performance, with a de-oiled oily sewer sample producing less current. A stabilization lagoon sample and a stripped sour wastewater sample failed to produce appreciable current. Electricity production, organics removal, and startup time were improved when the anode was first acclimated to domestic wastewater. These results show mini-MECs are an effective method for evaluating treatability of different wastewaters. © 2013 Elsevier Ltd.

  4. Sistemas electorales y justicia electoral a debate

    Directory of Open Access Journals (Sweden)

    Dieter Nohlen

    2015-07-01

    Full Text Available Despliega conceptos y planteamientos en torno a los sistemas electorales y la justicia electoral. El autor inicia con una descripción estricta de los sistemas electorales para orientar, en una segunda parte, un debate sobre la justicia electoral, que marca dos tendencias: la judicialización de la política y la politización de la administración y la jurisdicción electoral. Concluye que el desarrollo de la justicia electoral en América Latina, en sus múltiples dimensiones, es comprensible sólo con referencia al contexto sociocultural y político de la región

  5. GPS: El sistema de posicionamiento global

    Directory of Open Access Journals (Sweden)

    Juan Gilberto Serpas

    2016-03-01

    Full Text Available El Sistema de Posicionamiento Global (GPS, por sus siglas en inglés se ha convertido, en la actualidad, en una herramienta invaluable para el posicionamiento de puntos sobre la superficie terrestre. Este artículo pretende dar al lector una descripción del GPS, así como la introducción al cálculo de coordenadas para ser usadas tanto en navegación como en labores de topografía y geodesia. Las características principales del sistema son descritas y se introducen los principios básicos para la determinación de coordenadas tanto en modo absoluto como en modo relativo.

  6. La decadencia del Sistema Nacional de Salud

    Directory of Open Access Journals (Sweden)

    Costas Lombardía, Enrique

    2005-02-01

    Full Text Available El Sistema Nacional de Salud no es, como oficialmente se enseña, un todo ramificado o descentralizado, sino un mosaico compuesto por 17 «todos », los 17 servicios sanitarios autonómicos, cada uno de ellos con poder estatutario para configurarse a sí mismo como entidad propia, sin interferencias de la administración central. Servicios casi soberanos, diferentes en criterios de asistencia y pautas administrativas, refractarios a su coordinación y cohesión, y hasta desconocidos entre si. Cada uno responde sólo ante los ciudadanos votantes de su comunidad, y está ensimismado en sus ambiciones (su política, sus posibles votos en busca del provecho partidista propio, y desinteresado del Sistema Nacional…

  7. Sistema de domòtica

    OpenAIRE

    Andreo García, Pedro

    2011-01-01

    Memòria del TFC de Sistemes Encastats, relatiu a una aplicació de domòtica implementada mitjançant una xarxa de sensors sense fils. Memoria del TFC de Sistemas Empotrados, relativo a una aplicación de domótica implementada mediante una red de sensores inalámbricos. Final degree project dissertation on Embedded Systems on a home automation application implemented through a network of wireless sensors.

  8. usando dinámica de sistemas

    Directory of Open Access Journals (Sweden)

    Carlos Mario Parra Mesa

    2006-01-01

    Full Text Available Este artículo pretende motivar a los estamentos académicos y a las pequeñas y medianas organizaciones a desarrollar en el área de la simulación dinámica de sistemas trabajos conjuntos que conlleven a un direccionamiento empresarial más claro y confiable, y de paso contribuyan a la formación de profesionales mejor capacitados para satisfacer las necesidades del medio. Para ello se presenta la aplicación de la simulación dinámica de sistemas en una pequeña empresa, mediante la modelación y simulación computacional del proceso de plastificado de barra metálica para carpetas de FRAMECO S.A (Bello-Antioquia, con interés particular en la identificación de las limitaciones del sistema, la capacidad de producción, el tiempo tipo del proceso, el tiempo ocioso de la mano de obra y el tiempo de consumo innecesario del gas empleado como insumo en uno de los equipos; igualmente, se ilustra de manera general el análisis de sensibilidad del proceso. Como resultado se obtiene un modelo de simulación que representa de manera razonable el comportamiento dinámico del proceso y le facilita al directivo, académico o analista, la comprensión, el análisis y el mejoramiento del sistema productivo.

  9. El Sistema Político Latinoamericano

    Directory of Open Access Journals (Sweden)

    Luis Dallanegra Pedraza

    2003-01-01

    Full Text Available Se ha escrito mucho sobre la problemática latinoamericana, y sobre sus aspectos históricos, especialmente en relación con Estados Unidos, y sobre las políticas que este país ha ido aplicando históricamente en sus sucesivos períodos de gobierno, hacia América Latina. Sin embargo, no se ha hecho un estudio profundo sobre el sistema político latinoamericano. Al menos sobre la existencia de un sistema político específico en América Latina que la caracterice desde ese punto de vista. Siempre se han utilizado las tipologías políticas europeas para caracterizar al continente suramericano, siendo que se trata de sociedades y culturas políticas diferentes. Es cierto que existe una “geografía” llamada América Latina; lo que no necesariamente coincide con la existencia de un sistema político que abarque esa región. Lo más peculiar es que, lo que era considerado como la “verdad” en la América Latina de los cuarentas, cincuentas, sesentas, e incluso hasta los ochentas; luego de la caída del Muro de Berlín en 1989 y la desintegración de la URSS en 1991, paso a ser lo errado. Se procura mostrar el hilo conductor del comportamiento de los sistemas políticos latinoamericanos.

  10. Sistema de seguridad en redes locales utilizando sistemas multiagentes distribuidos. Net-Mass

    Directory of Open Access Journals (Sweden)

    Daniel Horfan Álvarez

    2005-01-01

    Full Text Available La seguridad en las redes de datos es uno de los elementos neurálgicos dentro de una organización, ya que requiere de diferentes estrategias de protección para salvaguardar puntos vulnerables, y de la coordinación y distribución de esfuerzos para cercar todas las posibles formas de ataques informáticos. En este artículo se propone un sistema multiagente distribuido como herramienta de protección para redes con diferentes sistemas operativos y susceptibilidad de diversos ataques.El sistema propuesto está conformado por un grupo de agentes autónomos heterogéneos con características particulares en cuanto a sus estrategias de detección de intrusos y protección de los sistemas primordiales de la red, se tiene planeado que estos agentes basen sus decisiones en la aplicación de diferentes técnicas de inteligencia artificial como heurística de sistemas expertos, algoritmos evolutivos y redes neuronales.

  11. Ideia Filosófica e Sistema

    Directory of Open Access Journals (Sweden)

    João Alberto Wohlfart

    2017-02-01

    Full Text Available O objeto do artigo é desenvolver uma interpretação do parágrafo 15 da Enciclopédia das Ciências Filosóficas na perspectiva da reconstrução da estrutura e do movimento de autoconstrução do sistema filosófico hegeliano. O pequeno parágrafo contém vários indicativos acerca da estrutura global, tais como os movimentos próprios da cada círculo, as relações entre os círculos filosóficos e a relações do círculo dos círculos com as esferas particulares. Como o texto se situa na introdução ao sistema enciclopédico, o propósito é explicitar os componentes sistemáticos do pensamento hegeliano constatados na organização do sistema, nas correlações entre Ciência da Lógica e Filosofia do Real e nas relações globais que o constituem. A espinha dorsal da abordagem será a articulação entre o todo filosófico e as suas respectivas partes a partir de leituras proporcionadas por vários comentaristas.

  12. Centralidade e hierarquia do sistema financeiro brasileiro

    Directory of Open Access Journals (Sweden)

    Marco Crocco

    2012-07-01

    Full Text Available O objetivo deste artigo é analisar a relação entre o sistema financeiro e o grau de centralidade do município onde esse está localizado. Para tanto, é realizada inicialmente uma discussão teórica, inédita, que visa analisar como o grau de centralidade pode afetar a forma de atuação de um banco em um local específico, tendo como ponto de partida a teoria da preferência de liquidez e a concepção de oferta de moeda endógena desenvolvida por Keynes. Após essa discussão teórica, será feita uma análise empírica sobre o caso brasileiro. Assim, é proposta uma hierarquia dos municípios brasileiros definida pela hierarquia do sistema financeiro neles existentes. Com base nessa hierarquia, a forma de atuação das agências bancárias em cada nível hierárquico é analisada. O estudo concluiu que o espaço é um importante elemento na definição das formas de atuação do sistema bancário, com consequências visíveis para o desenvolvimento econômico das regiões.

  13. 陶瓷微滤膜改性技术及其含油废水处理应用%Ceramic Microifltration Membrane Modiifcation and Its Application to Oily Wastewater Treatment

    Institute of Scientific and Technical Information of China (English)

    胡学兵; 周健儿; 汪永清; 张小珍; 常启兵

    2016-01-01

    当前含油废水对环境的污染非常严重,而膜法处理含油废水仍然存在诸如渗透通量较低、渗透液中油含量较大等缺陷。因此,迫切需要通过技术手段解决上述问题。而研发低成本高性能的基膜材料和采用膜改性技术提升膜性能,目前已成为解决上述问题的重要手段。由此,本文提出了采用纳米金属氧化物和氧化石墨烯对商业化陶瓷微滤膜进行改性,并将其应用于油水分离,实现膜油水分离效率显著提升。%Currently, oily wastewater pollution of the environment is very serious, and membrane treatment of oily wastewater is still in use, but with little permeate lfux, large permeate oil content and other defects. Therefore, technical methods are urgently needed to solve the above defects. The development of low-cost and high-performance support materials and the use of modiifcation to enhance membrane performance have become important solutions to these problems. Thus, we propose the use of nano metal oxides and graphene oxide in the modiifcation of the commercial ceramic microifltration membrane and the treatment of the oily wastewater, and the membrane with superior oil-water separation efifciency can be achieved.

  14. Effect of surface roughness of ceramic membrane on the performance of filtrating oily wastewater%陶瓷膜表面粗糙度对含油废水过滤性能的影响

    Institute of Scientific and Technical Information of China (English)

    张兵兵; 仲兆祥; 邢卫红

    2011-01-01

    采用表面粗糙度仪、扫描电子显微镜(SEM)和三维非接触表面形貌仪(WLI)表征膜表面形貌,并考察了陶瓷膜表面粗糙度对过滤含油废水性能的影响.结果显示,具有不同表面粗糙度的相同孔径陶瓷膜,其纯水通量基本相同;粗糙度越大的膜,过滤含油废水的膜通量衰减越快,稳定通量也越低;陶瓷膜表面粗糙度对油截留率基本没有影响;废水中油滴粒径的变化对粗糙度大的膜的稳定通量影响显著,表明光滑膜更适合于处理含油废水.%The information of surface morphology was provided by surface roughness tester, scanning electron microscopy (SEM) and white light interferometer (WLI), and the effect of surface roughness of ceramic membrane on the performance of filtrating oily wastewater was investigated The ceramic membranes with the same pore size and different surface roughness had the same pure water flux. The results of filtrating oily wastewater indicated that the rougher membranes had larger flux decline and lower steady flux than that of smoother ones. With the change of droplet size in the wastewater, the rougher membrane had the larger change of the steady flux. Surface roughness had little effect on oil rejection. This study indicated that smoother membrane was suitable for treating oily wastewater.

  15. Use of organophilic clays in purification of oily wastewater; Uso de argilas organofilicas na purificacao de efluentes oleosos

    Energy Technology Data Exchange (ETDEWEB)

    Silva, A.A. [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Engenharia de Processos], email: adriana_anp@yahoo.com.br; Pereira, K.R de O.; Wiebeck, H.; Valenzuela-Diaz, F.R. [Universidade de Sao Paulo (EPUSP), SP (Brazil). Escola Politecnica. Dept. de Engenharia Metalurgica e de Materiais; Rodrigues, M. G.F. [Universidade Federal de Campina Grande (UFCG), PB (Brazil). CCT. Dept. de Engenharia Quimica

    2006-07-01

    Water mixed with oil is produced in great volume in industrial processes and in petroleum refineries. This mixture must be treated to return to environment or can be reused in the same process. The refine of this water is expensive and presents a difficult execution. The process of separation of oil in water used organophilic clays can be a new option. In this work, the process of preparation of organophilic clays using smectitic clay polycationic and a industrial sodium bentonite both from Paraiba State, Brazil is described. The samples were characterized by two techniques: X-ray Diffraction and Thermal Analysis. After preparation of the organophilic clays it was determined theirs swelling in organic solvents and oil adsorption capacity. The organophilic clays presented higher capacity of oil adsorption when compared to activated carbon. (author)

  16. Microbial production of aliphatic hydrocarbons. Progress report, February 1, 1979-September 30, 1979. [Optimization for commercial oily hydrocarbon production

    Energy Technology Data Exchange (ETDEWEB)

    Tornabene, T G

    1979-09-01

    The neutral lipids of nine species of methanogenic bacteria, two thermoacidophiles, two alkalinophiles and 20 algal samples were analyzed. The major components were C/sub 30/, C/sub 25/, and/or C/sub 20/ acyclic isoprenoid hydrocarbons with a continuous range of hydroisoprenoid homologues. The range or acyclic isoprenoids detected were from C/sub 14/ to C/sub 30/. The neutral lipid composition from these bacteria resembles the isoprenoid distribution isolated from ancient sediments and petroleum. Therefore, these findings may have major implications to biological and biogeochemical evolution. In this connection, samples and cores from ancient sediments and future fossil fuel source beds are being analyzed for these neutral lipids as well as the more polar isopranyl glycerol-ether lipids. The derivation of fossil fuels and the biomass accumulations are the focal points of this phase of the study. Ancient and recent sediments, future source beds, and local esturaries are being enriched for microorganisms to establish a range and capability profile for hydrocarbon production. Only a relatively small percent of the microorganisms isolated demonstrated the ability to synthesize hydrocarbons; however, one particular algal isolate demonstrated that it can synthesize hydrocarbons while in a green physiological stage. Greater production is expected in the brown phase of growth. Hydrocarbon biosynthesis studies were conducted in an attempt to better understand the conditions required to maximize hydrocarbon production. The program involved physical and chemical parameters as well as assays of specifically labelled precusors with a cell free enzyme system to measure their conversions to hydrocarbons. The results have indicated a complex one enzyme system is involved in condensation and reduction of two fatty acids into hydrocarbons.

  17. Development of a method for the simultaneous treatment of oily and communal waste waters. Final report; Entwicklung eines Verfahrens zur simultanen biologischen Behandlung von veroeltem und kommunalem Abwasser. Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Schloericke, W.; Raasch, F.; Lieske, U.; Lewerenz, S.; Schneider, S.; Hesse, D.

    1993-09-01

    In this research project a concept was elaborated for a purification plant for oily waste water. The hydrocarbons are decomposed aerobically in a fixed-bed bioreactor. A plastic base material is used for the biomass. The purified water is in keeping with the legal limit values. (EF) [Deutsch] Im vorliegenden Forschungsbericht wurde ein Anlagenkonzept zur Reinigung oelhaltigen Abwassers erarbeitet. Der aerobe Abbau der Kohlenwasserstoffe erfolgte in einem Testbett-Bioreaktor. Als Traegermaterial fuer die Biomasse wurde Kunststoff verwendet. Das gereinigte Abwasser entspricht den gesetzlichen Bestimmungen. (EF)

  18. Control integral systems; Sistemas integrales de control

    Energy Technology Data Exchange (ETDEWEB)

    Burgos, Estrella [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-12-31

    Almost two third of the electric power generation in Mexico are obtained from hydrocarbons, for that reasons Comision Federal de Electricidad (CFE) dedicated special commitment in modernizing the operation of fossil fuel central stations. In attaining this objective the control systems play a fundamental roll, from them depend a good share of the reliability and the efficiency of the electric power generation process, as well as the extension of the equipment useful life. Since 1984 the Instituto de Investigaciones Electricas (IIE) has been working, upon the request of CFE, on the development of digital control systems. To date it has designed and implemented a logic control system for gas burners, which controls 32 burners of the Unit 4 boiler of the Generation Central of Valle de Mexico and two systems for distributed control for two combined cycle central stations, which are: Dos Bocas, Veracruz Combined cycle central, and Gomez Palacio, Durango combined cycle central. With these two developments the IIE enters the World tendency of implementing distributed control systems for the fossil fuel power central update [Espanol] Casi las dos terceras partes de la generacion electrica en Mexico se obtienen a partir de hidrocarburos, es por eso que la Comision Federal de Electricidad (CFE) puso especial empeno en modernizar la operacion de las centrales termoelectricas de combustibles fosiles. En el logro de este objetivo los sistemas de control desempenan un papel fundamental, de ellos depende una buena parte la confiabilidad y la eficiencia en el proceso de generacion de energia electrica, asi como la prolongacion de la vida util de los equipos. Desde 1984 el Instituto de Investigaciones Electricas (IIE) ha trabajado, a solicitud de la CFE, en el desarrollo de sistemas digitales de control. A la fecha se han disenado e implantado un sistema de control logico de quemadores de gas, el cual controla 32 quemadores de la caldera de la unidad 4 de la central de generacion

  19. 阴离子/非离子表面活性剂体系洗涤含油污泥%Experiment on enhanced washing of oily sludge by anionic/nonionic mixed surfactant

    Institute of Scientific and Technical Information of China (English)

    刁潘; 刘静; 张永奎; 刘瑾; 姚太平

    2014-01-01

    Preparation of complex detergent and experiments for the optimization of washing condition were conducted by treating the heavily oil-contaminated soil from an oilfield in Xinjiang. Orthogonal experiments were carried out to investigate the influence of concentrations of anionic surfactant, nonionic surfactant and the assistant washing agents (sodium silicate) on the residual oil content in the sample. It was found that there was a strong interaction between LAS and APEO,which enhanced washing effect and reduced the amount of detergent. The best detergent formulations were:sodium dodecyl benzene sulfonate (LAS) 2g/L,alkyl phenol ethoxylates (APEO) 3g/L,Na2SiO3 3g/L. The optimal liquid-solid ratio,temperature and washing time were 10∶1,70℃ and 1h. The oil content in sludge sample reduced from 26.07% to 1.21% by washing. The components removed by washing were analyzed by infrared spectroscopy (IR). It showed that most saturates,aromatics,resin, asphaltene in oily sludge were removed,which were considered as four main components in oil. Especially,saturates were removed obviously.%针对新疆某油田重度石油污染土壤,进行了洗涤剂的复配及洗脱条件的优化研究。考察了阴离子表面活性剂浓度、非离子表面活性剂浓度以及硅酸钠助剂浓度对残油量的影响。正交实验结果表明,十二烷基苯磺酸钠(LAS)与烷基酚聚氧乙烯醚(平平加,APEO)间存在着较强的交互协同作用;两者复配可以增强洗涤效果,并减少药剂用量。优化的复配洗涤剂配方为: LAS 2g/L,平平加3g/L,Na2SiO33g/L。复配洗涤剂洗涤含油污泥的最佳操作条件为:液固质量比10∶1、洗涤温度70℃、洗涤时间1h,在此条件下污泥含油量从26.07%降低至1.21%。对污泥洗涤前后的红外光谱检测表明该复配洗涤剂对于污泥中原油的饱和分、芳香分、胶质和沥青质都有洗涤效果,特别是对饱和分的去除效果尤为显著。

  20. Sociocibernética: tensiones entre sistemas complejos, sistemas sociales y ciencias de la complejidad

    OpenAIRE

    2016-01-01

    Este artículo hace una presentación de la “sociocibernética” —el estudio de los fenómenos y problemas sociales como sistemas— como un campo donde se registran tensiones entre diferentes corrientes y programas, tanto de la sociología como de las ciencias de sistemas y de la complejidad. El trabajo consta de 3 partes: en la primera se introducen los antecedentes y orígenes de la sociocibernética; en la segunda se presentan dos programas sociocibernéticos particulares —la Teoría de los Sistemas ...

  1. Sistemas electorales y partidos políticos

    OpenAIRE

    Vélez Álvarez, Luis Guillermo

    2009-01-01

    A partir de una visión sumaria de los diferentes sistemas electorales, se pasa a describir su evolución histórica en Colombia. Se sugiere que la reforma del sistema electoral durante los años noventa contribuyó a la quiebra del bipartidismo, hasta entonces dominante, y al surgimiento de un sistema multipartidista en proceso de consolidación.

  2. Fundamentos de los Sistemas de Información

    OpenAIRE

    Noriega, Daniel

    2012-01-01

    Un sistema de información es una solución organizacional y administrativa , basada en tecnología de información para un desafío del ambiente. Para entender los sistemas de información completamente, un administrador debe entender la amplitud de la organización , gerencia y dimensiones de los sistemas de tecnología de información. 1-42

  3. Sistemas electorales y partidos políticos

    OpenAIRE

    Vélez Álvarez, Luis Guillermo

    2009-01-01

    A partir de una visión sumaria de los diferentes sistemas electorales, se pasa a describir su evolución histórica en Colombia. Se sugiere que la reforma del sistema electoral durante los años noventa contribuyó a la quiebra del bipartidismo, hasta entonces dominante, y al surgimiento de un sistema multipartidista en proceso de consolidación.

  4. Hacia un nuevo Sistema de Reparto de Utilidades

    OpenAIRE

    2007-01-01

    Este trabajo presenta en primer lugar un análisis del actual sistema de la participación de los trabajadores en las utilidades de las empresas (PTU) en México como factor productivo y como sistema flexible, así como las controversias legales por las que ha atravesado este sistema, básicamente enfocadas a la inconstitucionalidad de la base gravable y la no deducibilidad de las empresas por el pago de la PTU. En segundo lugar se presentan las conclusiones del análisis de este sistema, las recom...

  5. Control adaptivo de sistemas lineales en tiempo discreto parcialmente conocidos

    OpenAIRE

    Troparevsky, María Inés

    1995-01-01

    El Control Adaptivo comprende el desarrollo de técnicas para controlar sistemas cuyas ecuaciones son sólo parcialmente conocidas. Este tipo de técnicas, cuyo análisis y desarrollo data ya de mas de tres décadas, apunta a la solución de problemas presentes en distintas disciplinas en las que intervengan sistemas de control. Una realidad a la que se enfrentan aquellos que trabajan con sistemas reales de control es el problema de diseñar modelos para estos sistemas. El hecho de no conocer exacta...

  6. Control adaptativo de sistemas no lineales a tiempo discreto

    OpenAIRE

    González, Graciela Adriana

    1997-01-01

    Este trabajo se dedica a la aplicación de técnicas adaptativas con el propósito de resolver el problema de seguimiento de trayectorias para algunas clases de sistemas no lineales a tiempo discreto. Se alcanza el objetivo de control por diversos caminos. Éstos se resumen en la utilización de métodos de control adaptativo conocidos a sistemas submodelados como lineales, extensión de estrategias clásicas para sistemas lineales a sistemas no lineales parametrizados y diseño de algoritmos ad-hoc p...

  7. Caos en sistemas clásico-cuánticos

    Science.gov (United States)

    Dirani, L. D.; Núñez, J. A.

    Una de las formas de estudiar la existencia de caos en el comportamiento de un sistema clásico-cuántico, es truncando el espacio de Hilbert del sistema cuántico. El objetivo de este trabajo es analizar como afecta dicho truncamiento en la dinámica del sistema. Para tal fin se propone un Hamiltoniano integrable, cuyos valores de expectación asociados a coordenadas y momentos cuánticos responden, por el teorema de Ehrenfest, a un sistema de dos osciladores clásicos con acoplamiento lineal.

  8. Um modelo de enfermagem como sistema complexo adaptativo

    OpenAIRE

    Mariana Vieira; Patrícia Klock; Roberta Costa; Alacoque Lorenzini-Erdmann

    2009-01-01

    El surgimiento y el uso de los sistemas complejos adaptativos suplieron la necesidad de contar con una nueva alternativa, recurriendo a los paradigmas existentes. En cuanto al sistema de salud y de enfermería, ambos pueden verse como sistemas complejos adaptativos al aplicar un modelo visual que debe ser explorado para potenciar la complejidad de la ciencia de enfermería y de cuidados de salud. Desde esta perspectiva, el/la enfermero/a es un sistema complejo adaptativo, dinámico que interactú...

  9. Modelado Orientado a Objetos Global del Sistema Cardiorrespiratorio

    OpenAIRE

    Cuesta Merino, David

    2016-01-01

    Se ha realizado el modelado orientado a objetos del sistema cardiorrespiratorio, usando analogía eléctrica basada en la interconexión de elementos, actuadores y sensores eléctricos. En dicho modelado físico están representadas implícitamente las diferentes ecuaciones diferenciales que describen el comportamiento de este sistema así como el control que se realiza cuando el sistema debe adaptarse a diferentes situaciones. Esto permite obtener el comportamiento del sistema conjunto tanto en cond...

  10. Sistema fotovoltaico de iluminación solar

    OpenAIRE

    2013-01-01

    El artículo es el resultado de un trabajo de investigación enfocado al uso de sistemas fotovoltaicos para la iluminación por medio de diodos emisores de luz tipo LED. Se busca reducir el consumo energético mediante la implementación de un sistema de iluminación basado en LED hasta en un 80%, donde la fuente primaria de energía es el Sol. Se demuestra la viabilidad de los sistemas solares de iluminación LED mediante la construcción de un prototipo. Los sistemas de iluminación fotovoltaicos son...

  11. Novo sistema de armaduras de punçoamento

    OpenAIRE

    Claro, Pedro Henrique Bernardino

    2015-01-01

    Esta dissertação apresenta os resultados de um conjunto de ensaios sobre lajes fungiformes, armadas com um novo sistema de armaduras de punçoamento. Adicionalmente, também foram testadas lajes fungiformes com um novo sistema de armaduras horizontais. O sistema de armaduras de punçoamento consiste em estribos de ramos verticais produzidos a partir de malhas de varões eletrossoldados, ancorados na armadura longitudinal superior por um varão transversal eletrossoldado. As vantagens deste sistema...

  12. Módulo IV: sistema soporte de predicciones

    OpenAIRE

    Caliusco, María Laura; Villareal, Pablo; Toffolo, Alejandro; Taverna, María Laura; Chiotti, Omar Juan Alfredo

    1997-01-01

    En este trabajo presentamos una descripción de un subsistema que brinda soporte a la actividad de predicciones. Este subsistema forma parte de un Sistema Soporte de Decisiones globales prototipo en desarrollo en el GIDSATD (Grupo de Investigación y desarrollo de Sistemas de Ayuda a la Toma de Decisiones). En particular, en primer lugar describimos brevemente la base de modelos del sistema, en segundo lugar presentamos un análisis y diseño orientado a objetos del sistema soporte de prediccione...

  13. Guanosina : uma nova abordagem do sistema purinérgico

    OpenAIRE

    Felix Alexandre Antunes Soares

    2005-01-01

    Durante as últimas décadas os estudos do sistema purinérgico concentraram seu foco de atenção nas ações dos derivados da adenina (como adenosina e o ATP). Seus efeitos, receptores, agonistas e antagonistas encontram-se muito bem estabelecidos dentro do sistema nervoso central. Os resultados obtidos com os diversos estudos dos derivados da guanina trazem uma nova perspectiva para o estudo do sistema purinérgico. Os nucleotídeos derivados da guanina são classicamente associados ao sistema de tr...

  14. Um modelo de enfermagem como sistema complexo adaptativo

    Directory of Open Access Journals (Sweden)

    Mariana Vieira

    2009-01-01

    Full Text Available El surgimiento y el uso de los sistemas complejos adaptativos suplieron la necesidad de contar con una nueva alternativa, recurriendo a los paradigmas existentes. En cuanto al sistema de salud y de enfermería, ambos pueden verse como sistemas complejos adaptativos al aplicar un modelo visual que debe ser explorado para potenciar la complejidad de la ciencia de enfermería y de cuidados de salud. Desde esta perspectiva, el/la enfermero/a es un sistema complejo adaptativo, dinámico que interactúa, pero también es agente de un sistema complejo adaptativo en una unidad de enfermería, que a la vez es un sistema complejo adaptativo en una organización de la salud. Hoy en día la/el profesional de enfermería busca actualizarse y cualificarse en diversas especialidades, que van desde enfermería neonatal hasta cuidados geriátricos, para ejecutar sus actividades y visualizar su ambiente laboral desde la perspectiva de un sistema complejo. En consecuencia, la organización del sistema de cuidados permite, mediante los sistemas complejos, apoyarse en el saber compartido de los diversos profesionales y en el trabajo en equipo para disfrutar la complicidad de la cadena cliente-usuario-profesionales.

  15. Systematic development of solid self-nanoemulsifying oily formulations (S-SNEOFs) for enhancing the oral bioavailability and intestinal lymphatic uptake of lopinavir.

    Science.gov (United States)

    Garg, Babita; Katare, O P; Beg, Sarwar; Lohan, Shikha; Singh, Bhupinder

    2016-05-01

    The present studies entail the development of the systematically optimized solid self-nanoemulsifying oily formulations (S-SNEOFs) for enhancing the systemic bioavailability of lopinavir and targeting the same to the sanctuary site, i.e., lymphatic system for complete HIV inhibition. The patient-centric quality target product profile (QTPP) was defined and critical quality attributes (CQAs) earmarked. Risk assessment studies, carried out through failure mode and effect critically analysis (FMECA), helped in identifying the plausible risks or failure modes affecting the quality attributes of the drug product. As per the preliminary studies, viz solubility and phase titration studies, and factor screening studies, Maisine (i.e., lipid), Tween 80 (emulgent), Transcutol HP (i.e., cosolvent) were selected as the critical material attributes (CMAs) of the liquid SNEOFs (L-SNEOFs). D-optimal mixture design was employed for the optimization of aforesaid CMAs and evaluated for in vitro dissolution, globule size, ex vivo permeation studies as the critical quality attributes (CQAs). Optimal composition of CMAs, was embarked through numerical optimization and desirability function, exhibited excellent permeation and drug release characteristics besides possessing globule size in nano range, i.e., 53.16 nm. Further to increase the stability and drug loading, the OPT-L-SNEOFs were then adsorbed onto the porous carrier, i.e., Aeroperl, to prepare the OPT-SNEOF tablets which were finally compressed into the tablet employing MCC as the filler. The performance evaluation through in situ SPIP studies ascribed the significant enhancement in absorptivity parameters of both the SNEOFs vis-à-vis the pure drug. Also, chylomicron flow block SPIP studies revealed lymphatic uptake of lopinavir from the SNEOFs. Overall, in vivo pharmacokinetic studies in rats revealed significant improvement in the rate and extent of oral bioavailability of the SNEOFs compared to the pure drug. These studies

  16. Modeling of filtrate COD in submerged membrane bioreactor for oily wastewater treatment%SMBR处理含油废水出水COD数学模型

    Institute of Scientific and Technical Information of China (English)

    杜晓文; 王占生; 满春志; 李薇; 刘磊; 徐毅

    2012-01-01

    根据微生物生长动力学特征以及膜分离特征,建立恒通量下运行的一体式膜生物反应器系统出水COD数学模型,提出膜生物反应器处理效率的数学模型。以实验及模型为基础,分别对进水COD浓度控制在300、400、500 mg/L附近时经过反应器后COD的去除效率进行了比较。通过公式计算的数据和实验数据分析可得:COD去除率的公式计算值与实验结果比较吻合,相对偏差仅为0.0223,为膜系统有机物的去除效果估算提供了基础,可为该类工艺的参数选择与优化提供参考。%To predict the effluent quality in MBR processes, a mathematic model for removal efficiency in MBR processes was established, deriving from models standing for the chemical oxygen demand (COD) of the ef- fluent with constant membrane flux. The model was also based on the dynamics characteristics of microbial growth and membrane separation. The experiment was carried out in a lab-scale to treat oily wastewater in a submerged membrane bioreactor (SMBR). Thereby comparisons between experimental data and imputed value were investiga- ted at COD values of 300,400 and 500 mg/L. The results showed data good match of the COD removal efficiency between models and experiment, with a relative deviation of O. 0223, providing a foundation for estimating organics removing efficiency in membrane system and a recommendation for preferences and optimization of the processes.

  17. Treatment of Oily Wastewater by Flotation -Magnetic Separation Process%气浮—磁分离工艺处理含油废水

    Institute of Scientific and Technical Information of China (English)

    杨瑞洪; 钱琛; 赵云龙; 邓阳清

    2011-01-01

    采用气浮—磁分离工艺处理某石化企业的含油废水,重点考察了磁分离单元的工艺条件对除油率的影响.实验结果表明磁分离单元的最佳工艺条件为:絮凝剂聚合氯化铝加入量25 mg/L,磁种加入量100 mg/L,磁场强度40 mT,搅拌条件为先以150 r/min的转速搅拌2 min,再以50 r/min的转速搅拌5 min.在最佳工艺条件下进行气浮—磁分离工艺除油实验,在进水油质量浓度平均为29.5 mg/L时,气浮单元出水油质量浓度平均为8.5 mg/L,除油率平均为71.1%;磁分离单元出水油质量浓度平均为4.7 mg/L,除油率平均为44.1%;总除油率平均为83.8%.%The oily wastewater of a petrochemical enterprise was treated by flotation - magnetic separation process. The effects of the process conditions in the magnetic separation unit on the oil removal rate were studied especially. The optimum process conditions are as follows; flocculant PAC dosage 25 mg/L, magnetic seed dosage 100 mg/L, magnetic field strength 40 mT, stirring time 2 min with 150 r/min of rotation speed, stirring time 5 min with 50 r/min of rotation speed. Under theses conditions, and when the average oil mass concentration of the influence is 29.5 mg/L, the average oil mass concentration of the effluent from the flotation unit is 8.5 mg/L with 71.1% of oil removal rate, and that of the effluent from the magnetic separation unit is 4.7 mg/L with 44.1% of oil removal rate. The average total oil removal rate is 83. 8%.

  18. Studies on Pollution Control Standards of Comprehensive Utilization of Oily Sludge Pollution%油田含油污泥综合利用污染控制标准研究

    Institute of Scientific and Technical Information of China (English)

    匡丽; 葛树生

    2013-01-01

    Researching on oily sludge treatment and comprehensive utilization at home and abroad, this paper finds out four ways of oil sludge treatment and comprehensive utilization in Heilongjiang Province, which include landfill disposal, agricultural utilization, padding the well site and well road as well as road subgrade earthwork. DB23/T 1413 - 2010 " Pollution Control Standards of Oily Sludge Comprehensive Utilization of the Oilfield" eventually defines petroleum and another 11 indexes as comprehensive utilization pollution control standards for padding well site and well road as well as agricultural utilization.%通过国内外油田含油污泥处理和综合利用的调研,确定了黑龙江省油田含油污泥的处理和综合利用途径主要有填埋处理、农用、垫井场和通井路、公路路基土方.DB23/T 1413-2010《油田含油污泥综合利用污染控制标准》最终将油田含油污泥中的石油类等11项指标,作为油田含油污泥用于垫井场和通井路或农用综合利用的污染控制指标.

  19. El sistema garantista en derecho penitenciario

    OpenAIRE

    Fernández García, Julio

    2015-01-01

    [ES] El sistema garantista en derecho penitenciario lo incardinamos en las teorías del derecho penitenciario mínimo, garantista, siguiendo las tesis de Ferrajoli del Derecho Penal Mínimo, lo que supone que en la fase de ejecución penitenciaria se respeten escrupulosamente los derechos fundamentales del condenado y se garanticen los principios de legalidad, intervención mínima, resocialización, culpabilidad, proporcionalidad, presunción de inocencia, humanidad, eficacia preventiva y jurisdicci...

  20. Un sistema de saneamiento para Madrid

    OpenAIRE

    Sánchez, Félix Cristóbal

    1986-01-01

    The Full Sanitation Plan for Madrid is the final action of a series undertaken for several years with the purpose to reach the completion of the sanitation system of the town. With the whole of these actions it could be said that the basic substructure has acquired enough level to deserve de real needs of the town.El Plan de Saneamiento Integral de Madrid representaba la culminación de una serie de acciones emprendidas, durante varios años, para conseguir que la ciudad completase su sistema d...

  1. EVACUACION DE LOS SISTEMAS DE REFRIGERACION

    OpenAIRE

    Bloomfield Foster, Allan Mark

    2011-01-01

    Este articulo esta dirigido a los ingenieros de refrigeración y aire acondicionado, con el objetivo de explicarles la importancia del proceso de evacuación y deshidratación, en las instalaciones de los sistemas que son del tipo "armado en sitio".El articulo incluye tablas mostrando la relación entre presión manométrica, presión absoluta y micrones de vacio, con las temperaturas de saturacción correspondientes al nivel del mar como también para las otras altitudes que normalmente se encuentran...

  2. El Derecho Administrativo del Sistema Comunitario Andino

    OpenAIRE

    Jorge Enrique Santos Rodríguez

    2013-01-01

    Una de las tendencias contemporáneas del Derecho Administrativo es el reconocimiento de su existencia más allá de las fronteras de un Estado. Bajo esa premisa, se busca demostrar que en la Comunidad Andina de Naciones se configuran los elementos suficientes para afirmar que existe un Derecho Administrativo Comunitario Andino, en la medida en que de las normas andinas se desprende la existencia de una función administrativa andina, una organización administrativa al seno del Sistema Andino de ...

  3. El glaciarismo pleistoceno del Sistema Central

    OpenAIRE

    Pedraza Gilsanz, Javier; Carrasco, Rosa María

    2006-01-01

    El Sistema Central Español es una montaña intraplaca, originada por la reactivación de una antigua penillanura durante la orogenia Alpina. Sus cimas alomadas tienen una altura media de 1700-1800 m, en algunos sectores 1900-2000 m y en macizos locales pueden llegar a los 2300-2500 m; se trata por tanto de una montaña media, de ambiente mediterráneo continentalizado. Exceptuando Gata-Peña de Francia, en los macizos culminante de los demás sectores aparecen morfologías glaciares bien desarrol...

  4. Aleitamento materno e desenvolvimento do sistema estomatognatico

    OpenAIRE

    Sebastião Batista Bueno

    2005-01-01

    Resumo: O aleitamento é tido como um fator decisivo para a correta maturação e o crescimento das estruturas do sistema estomatognático, estimulando o desenvolvimento das funções fisiológicas e garantindo sobrevivência e qualidade de vida. O objetivo deste trabalho foi relacionar oclusopatias, aeração nasal e hábitos deletérios com o tempo de aleitamento materno. Os participantes foram 138 crianças de 4 a 5 anos, das creches municipais da cidade de Campo Limpo Paulista onde a coleta de dados e...

  5. Fisiología del sistema neurovegetativo

    OpenAIRE

    Pantoja, Cesar A.

    2012-01-01

    EI sistema neurovegetativo se puede estudiar desde muchos puntos de vista: desde el punto de vista clínico, desde el punto de vista de la fisiología, desde el punto de vista en la anatomía descriptiva y desde el punto de vista de la cirugía, He de concretarme hoy a algunos de sus aspectos fisiológicos, haciendo especial hincapié en las ideas modernas que tengan alguna confirmación experimental o clínica.

  6. Importancia del manual de los sistemas contables en el sistema de control interno.

    Directory of Open Access Journals (Sweden)

    Nicolás Valdés Rodríguez

    2007-01-01

    Full Text Available La dirección administrativa del país en los últimos 3 años ha insistido en la necesidad de profundizar en los mecanismos de control económico –financiero de las entidades, el presente trabajo va dirigido a contribuir en alguna medida a lograr ese propósito. El sistema contable de una Entidad forma parte indisoluble del Sistema de Control Interno de la misma, por la vinculación tan estrecha que existe entre los mismos. El objetivo fundamental del trabajo ”Importancia del Manual de los Sistemas Contables en el Sistema de Control Interno”, es destacar la utilidad práctica, técnica y organizativa que tiene el Manual para elevar la eficiencia del trabajo contable de las Entidades y su repercusión positiva en la eficiencia el sistema de Control Interno establecido. Los beneficios que aporta el Manual radican en que crea una base normativa contable adecuada a las características de cada entidad. Como se sabe en las transformaciones económicas realizadas en el país, la existencia de dos monedas en el trabajo económico-contable de muchas entidades, la puntualización del objeto social y la cartera de productos y servicios han complejizado el trabajo contable, requiriendo una mayor adecuación a las características propias de cada entidad, lo cual se logra con la realización del Manual.

  7. Viviendas de bajo costo sistema SALVY

    Directory of Open Access Journals (Sweden)

    Suárez Ibarra, Salvador

    1984-06-01

    Full Text Available The aim of this work is to offer an alternative for solving the current problem of housing, through a building system which has been developed and tested in our country — the SAL VY SYSTEM. It is directed towards solving the problem of low-cost housing with own technology, enabling these houses to be built quickly, using materials which are not traditional in building, but are abundant in our country. The house presented by us allows the user to extend its height according to his needs and financial possibilities, keeping the free area of the plot for so-called kitchen gardens.Este trabajo tiene como objetivo presentar una alternativa para la solución del problema actual de la vivienda, a través de un sistema constructivo desarrollado y experimentado en nuestro país —SISTEMA SALVY, dirigido a solucionar el problema de la vivienda de bajo costo, con una tecnología propia que permite la construcción de estas viviendas de una manera rápida, utilizando materiales no tradicionales en construcción, pero abundantes en nuestro país. La vivienda que presentamos permite al usuario ampliarla en altura, de acuerdo a sus necesidades y posibilidades económicas, manteniendo el área libre de la parcela para los denominados huertos del hogar.

  8. Crítica do direito e teoria dos sistemas

    National Research Council Canada - National Science Library

    Möller, Kolja

    2015-01-01

    RESUMO O artigo centra-se em abordagens da teoria crítica do sistema em relação ao direito e à sociedade; mostra como elas modificam a estrutura da teoria ortodoxa dos sistemas e discute a forma...

  9. Realidad de los sistemas de gestión ambiental

    Directory of Open Access Journals (Sweden)

    Sandra Constanza Escobar Cárdenas

    2009-07-01

    Full Text Available Este artículo presenta un análisis sobre la posibilidad de integrar los diferentes sistemas de gestión y la importancia que tiene los sistemas de gestión ambiental para el mejoramiento de las organizaciones. Luego de analizar comparativamente los modelos existentes, la autora presenta algunas recomendaciones de implementación.

  10. Teoría de sistemas (2008/09)

    OpenAIRE

    2008-01-01

    Conceptos fundamentales de la Teoría general de sistemas. Nociones básicas de estadística. Modelos cibernéticos. Sistemas caóticos.Asignatura optativa de Ciencias Ambientales. Primer ciclo. Segundo curso. Cuatrimestral: 6 créditos.

  11. Sistema expert en anàlisi de patrons socials

    OpenAIRE

    De Benito Bordoy, Iván

    2014-01-01

    Creació d'un sistema d'anàlisi de patrons socials a partir de comportaments predictius de la nostra base de coneixement. Creación de un sistema de análisis de patrones sociales a partir de comportamientos predictivos de nuestra base de conocimiento.

  12. Sistema de costos ABC en la mediana empresa industrial mexicana

    National Research Council Canada - National Science Library

    Lopez-Mejia, Maria Rosa; Gomez-Martinez, Alicia; Marin-Hernandez, Salvador

    2011-01-01

    ... industriales; aunado a lo antes expuesto, se advierte que el sistema de costos ABC o ABM, llamado asi por sus siglas en ingles activity-based costing o activity based management, resulta interesante y conveniente para empresas en ambientes competitivos que requieren reducir costos (Chenhall & Langfield-Smith, 1998). Constantemente se senala que el sistema d...

  13. Teoría de sistemas (2008/09)

    OpenAIRE

    Pla López, Rafael

    2008-01-01

    Conceptos fundamentales de la Teoría general de sistemas. Nociones básicas de estadística. Modelos cibernéticos. Sistemas caóticos.Asignatura optativa de Ciencias Ambientales. Primer ciclo. Segundo curso. Cuatrimestral: 6 créditos.

  14. La adaptacion como atributo esencial en el fomento de sistemas agropecuarios resilientes ante las perturbaciones

    National Research Council Canada - National Science Library

    Nahed Toral, Jose; Palma Garcia, Jose Manuel; Gonzalez Garcia, Eliel

    2014-01-01

    El presente trabajo tuvo como objetivo documentar algunos fundamentos teoricos del enfoque de sistemas y de la adaptacion como atributo primordial para conseguir sistemas agropecuarios resilientes y sostenibles...

  15. Sistemas diferenciales-algebraicos: aplicaciones a perturbación singular y control

    OpenAIRE

    Etchechoury, María del Rosario

    2001-01-01

    Los Sistemas Diferenciales Algebraicos (SDA) son también conocidos como sistemas singulares, implícitos, descriptores o sistemas generalizados. Surgen naturalmente como modelos dinámicos de aplicaciones de la ingeniería (tales como redes de circuitos eléctricos [1], sistemas de potencia [2], sistemas mecánicos con restricciones [3], ingeniería aeroespacial [4] y procesos químicos [5]); se utilizan también para modelar sistemas sociales, sistemas económicos, sistemas biológicos; etc. En ...

  16. Evolución estelar en sistemas binarios

    Science.gov (United States)

    De Vito, M. A.; Benvenuto, O.

    Definición y clasificación de sistemas binarios; descripción del comportamiento del sistema frente a la variación de su masa; binarias de rayos X; transferencia de masa en sistemas binarios masivos aplicado al posible esclarecimiento del progenitor azul de la supernova SN 1987A; comentario acerca de la evolución de enanas blancas de helio de baja masa y su conexión con los sistemas binarios; reseña del trabajo de Kippenhahn y Weigert sobre el cual está basado el código evolutivo desarrollado en la FCAG por el Dr. Benvenuto y sobre el cual se trabajará para poder incluir la evolución de una estrella con pérdida de masa perteneciente a un sistema binario.

  17. Sistemas de Ermakov generalizados, simetrias e invariantes exatos

    OpenAIRE

    Fernando Haas

    1998-01-01

    É feita uma revisão crítica das propriedades fundamentais dos sistemas de Ermakov, compreendendo a lei de superposição não linear e a linearização dos sistemas de Ermakov nos casos em que a função freqüência depende apenas do tempo. Apresentam-se as aplicações mais relevantes dos sistemas de Ermakov na mecânica quântica. A teoria de Lewis e Riesenfeld é apresentada e utilizada na procura de estados coerentes e fases de Berry geométricas para sistemas quânticos. Sistemas de Ermakov generalizad...

  18. Linear concentration system; Sistema de concentracion lineal

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Lugo, J.I; Leon Rovira, N; Aguayo Tellez, H [Instituto Tecnologico y de Estudios Superiores de Monterrey, Monterrey, Nuevo Leon (Mexico)]. E-mails: a00812662@itesm.mx; noel.leon@itesm.mx; haguayo@itesm.mx

    2013-03-15

    Solar linear concentration technologies to generate high temperatures are limited to the ranges of 200 to 500 degrees Celsius. While its performance has been tested through prototypes and pilot plants around the world, there are still areas of opportunity that can be exploited to obtain a linear concentration that achieves temperatures above this range in order to have a better use of the available solar energy. Because of this: It is possible to develop a linear concentration system that can track the sun with minimal movement of the absorber-receiver while maintaining temperatures above 850 degrees Celsius sufficient for industrial processes that require that temperature. The methodology consists of a series of stages (conceptual design, simulation, evaluation, development concept, results and validation) through which concepts are generated that allow design and evaluation of solar concentrator configurations with the help of simulation software. We have designed a linear parabolic concentrating system which comprises a set of mirrors segments with different focal lengths that works within the range of 600 degrees Celsius; however, it is advancing in the development of a double concentration to reach 850 degrees Celsius. [Spanish] Las tecnologias de concentracion lineal solar para generar altas temperaturas se ven limitadas a los rangos de 200 a 500 grados centigrados. Si bien su funcionamiento ha sido probado a traves de prototipos y plantas piloto alrededor del mundo, aun existen areas de oportunidad que pueden ser aprovechadas para obtener un sistema de concentracion lineal que permita alcanzar temperaturas mayores a este rango para asi tener un mejor aprovechamiento de la energia solar disponible. Debido a esto: Es posible desarrollar un sistema de concentracion lineal capaz de seguir la trayectoria del Sol con minimo movimiento del absorbedor-recibidor al mismo tiempo que mantiene temperaturas superiores a los 850 grados centigrados suficientes para

  19. Measurement of harmonics in electrical power systems; Medicion de armonicas en sistemas electricos

    Energy Technology Data Exchange (ETDEWEB)

    Calderon Gonzalez, Gustavo Adolfo

    1998-07-01

    In this thesis project a system for the quantification and study of the harmonics content in electrical systems was developed. The study is focused to signals of feeding current to a Long Arc furnace. The system developed for the quantification of the harmonics content is formed by the following parts: (a) Data acquisition system: The application of a data acquisition system makes possible for us to take samples from an analogous voltage signal. The acquired samples that represent an analogous signal, can later be processed in a digital computer. The data acquisition system is constituted by: An IBM-PC microcomputer, a digitalization card of analogous signals, and programs to conduct signals sampling (b) Digital processing of the acquired signals: With the purpose of obtaining the harmonic content, the Fast Fourier Transform method was used. The analysis by means of the Fast Fourier Transform allows us to obtain the signals spectra in the frequency dominion. Through the analysis by means of the Fast Fourier Transform a substantial diminution of the calculation time of the coefficients corresponding to the harmonics is obtained, this compared with the method of Discreet Fourier Series. (c) Analysis of obtained results: Several line current and capacitors measurements of the feeding system signals of an arc furnace were made. For each measurement made the magnitude and the phase for each harmonic was obtained. Of the assembly of coefficient magnitudes and phases, the average value and its standard deviation were calculated. Graphs of the magnitude variation with time and phase of each harmonic are shown. Also, graphs of the waveform of the signal in analysis are obtained, bar charts of the average spectral content and a report of the standard deviation of the magnitude and the phase for each harmonica, is obtained. Results of a simulation of the electrical system in analysis are included and the results are compared. [Spanish] En este proyecto de tesis se desarrollo

  20. 温度、pH对含油污水荧光特性的影响%Effect of Temperature and pH on the Fluorescence Characteristic of Oily Waste Water

    Institute of Scientific and Technical Information of China (English)

    易黎丽; 尚丽平; 李占锋; 邓琥

    2011-01-01

    The present study was about the effect of temperature (5~55 ℃) and pH(3~12) value on the fluorescence characteristic of oily waste water from the export of China Petroleum & Chemical Oil Refinery. It was found that temperature only affects the fluorescence intensity but not the site of fluorescence peaks. The fluorescence peaks shift right that from 413 to 426. 5 nm when the oily waste water is acid. And along with the enhancing of the acidity the fluorescence intensity ascended.The fluorescence intensity decreased with alkaline enhancing but the site of fluorescence peaks remained unchanged at 398 nm.Temperature and pH value were the two important impact factors on the fluorescence characteristic of oily waste water. If desired it needs correction and compensation on temperature and pH value. That's expected to improve the detection accuracy of oil class and content.%研究了中石化炼油厂出口处含油污水在温度5~55℃,pH 3~12范围内的荧光光谱特性.结果表明,温度只对含油污水的荧光强度有影响,而不改变荧光峰位置;在酸性条件下荧光峰右移,从413 nm移到426.5 nm;且荧光强度随酸性增强而递增.碱性条件下随着碱性增强荧光强度降低,但荧光峰的位置没有移动,始终保持在398 nm.温度和pH值是含油污水荧光特性的两个重要影响因素,必要时需进行温度和pH值的校正补偿,可提高污水中油种类及含量检测的准确度.

  1. Experimental study of magnetic separation treatment on oily ground water%磁分离技术处理油污染地下水的实验研究

    Institute of Scientific and Technical Information of China (English)

    曹雨平; 邓阳清; 刘亚凯

    2011-01-01

    采用纳米Fe3O4磁种、普通微米Fe3O4磁种及硬脂酸表面改性普通磁种处理齐鲁石化堠皋3#地下水进行磁分离除油实验.考察各磁种投加量、絮凝剂和助凝剂投加量对除油率的影响,比较采用不同磁种对油污染地下水的磁分离处理效果.结果表明,当原水含油量为20~35mg/L时,采用表面有机改性磁种除油效果最好,在改性磁种投加量为100mg/L、聚合铝铁(PAFCS)为0.4g/L、PAM为0.8mg/L的条件下,除油率为67.3~72.5%,出水含油量为7.2~9.3mg/L.%Nano-magnetic seed, normal magnetic seed and surface organic modified magnetic seed were used to treat oily ground water from Hougao3# in Qilu Petrochemical Corporation for the separation of oily ground water. The effects of magnetic seed dosage, flocculants dosage and coagulantaids dosage on oil elimination rate were investigated. The effect of various magnetic seeds used in magnetic separation on the oil removal efficiency of oily ground water was compared. The results showed that when the oil content of ground water was 20~35mg/L, the best effect of oil removal is obtained for surface organic modified magnetic seed. When the modified magnetic seeds dosage is 100mg/L, PAFCS is 0.4g/L, PAM is 0.8mg/L, the oil removal efficiency is 67.3~72.5% and the effluent oil content is 7.2~9.3mg/L.

  2. O Mercosul e o sistema presidencialista

    OpenAIRE

    Luís Alexandre Carta Winter

    2008-01-01

    Nesta tese trabalha-se a origem e o histórico dos Blocos Econômicos em geral e do MERCOSUL em particular e, dentro do MERCOSUL, são esmiuçados o Tratado de Assunção, o Protocolo de Ouro Preto e a atual estrutura institucional do MERCOSUL, bem como o processo de internalização das normas ali existentes. Também são traçadas, dentro do sistema presidencialista, as condições históricas e sociais que o favoreceram, a história do presidencialismo dentro dos Estados-Partes originários do MERCOSUL, a...

  3. Talento emprendedor, inteligencia, creatividad y sistema educativo

    Directory of Open Access Journals (Sweden)

    Mariano Gutiérrez Tapias

    2014-01-01

    Full Text Available En este artículo, pretendemos realizar un sencillo análisis de términos relacionados con el talento, el emprendimiento y la creatividad por entender que dichos conceptos deben estar presentes en aquellas sociedades que pretenden seguir creciendo en lo cultural, en lo social y en lo económico. Ya decía Einstein que es muy difícil encontrar niños que sigan siendo creativos al terminar la escuela. Este reto debe afrontarlo el sistema educativo si quiere ser de utilidad a la sociedad, favorecer personas críticas y creativas, con pensamientos divergentes, capaces de aprender y desaprender, de reinventarse varias veces a lo largo de su vida.

  4. Modelado del estudiante en sistemas tutores inteligentes

    Directory of Open Access Journals (Sweden)

    Cataldi, Zulma

    2010-01-01

    Full Text Available En la producción de los STI convergen las distintas epistemológicas que quedan evidenciadas en la práctica docente. Se busca una nueva opción de diseño de STI que sea más versátil centrada en la forma en que los estudiantes mantienen, organizan y adquieren los nuevos conocimientos. Las diferentes formas de pensar de los estudiantes, constituyen los estilos de aprendizaje, a través de los cuales se puede establecer el modo en que estos conocimientos se almacenan, se relacionan y se utilizan con los adquiridos anteriormente. Es necesario caracterizar a los estudiantes además considerando el tipo de inteligencia preponderante en cada uno, ya que permitirá soluciones más individualizadas. Esto conlleva a rediseñar los componentes de cada módulo del sistema tutor.

  5. Un sistema de saneamiento para Madrid

    Directory of Open Access Journals (Sweden)

    Sánchez, Félix Cristóbal

    1986-03-01

    Full Text Available The Full Sanitation Plan for Madrid is the final action of a series undertaken for several years with the purpose to reach the completion of the sanitation system of the town. With the whole of these actions it could be said that the basic substructure has acquired enough level to deserve de real needs of the town.El Plan de Saneamiento Integral de Madrid representaba la culminación de una serie de acciones emprendidas, durante varios años, para conseguir que la ciudad completase su sistema de saneamiento. Con este conjunto de acciones comprendidas en el Plan puede decirse que esta infraestructura básica ha adquirido un nivel suficiente, capaz de prestar un servicio acorde con las auténticas necesidades de la Villa.

  6. LA INGENIERÍA DE SISTEMAS Y SU EVOLUCIÓN HACIA LA ARQUITECTURA DE SISTEMAS

    Directory of Open Access Journals (Sweden)

    EDGAR SERNA MONTOYA

    2009-12-01

    Full Text Available Muchas de las empresas modernas entendieron que sus antiguas unidades de sistemas ya no son funcionales, y comienzan a subdividirlas en dos grupos de trabajo diferenciadores: el encargado de la infraestructura y el de los denominados “arquitectos de Sistemas”. Esta decisión lógica la inspira la actual evolución de la Ingeniería de Sistemas que, como área de conocimiento, genera los mismos subgrupos como agentes para formación. Además, la evolución y complejidad de lossistemas de información en medio de la sociedad del conocimiento, con exigencias y expectativas muy complejas, también determinan la necesidad de esta especialización. En este documento, una traducción casi literal de un white paper que publicó la empresa Quidnunc -www.quidnunc.com consultado en abril del año 2000- especializada en gestión de configuración, se detalla la importancia de esta división y las pautas a seguir a la hora de diseñar la arquitectura de sistemas de una empresa

  7. Fusiones bancarias en el sistema financiero venezolano

    Directory of Open Access Journals (Sweden)

    Yajaira C. Bracho

    2002-01-01

    Full Text Available Debido a que el proceso de globalización financiera no es ajeno a los movimientos incipientes ocurridos en Venezuela luego de la crisis financiera de los noventa, se ha observado en el país un proceso de fusiones que no tiene antecedentes. Las fusiones bancarias es el objetivo principal de la presente investigación, en este se abordan los aspectos teóricos y legales de las fusiones, las razones que las motivan, así como también la evolución histórica de estas, en el sistema financiero venezolano. Las fusiones en el sistema financiero venezolano se han producido como una estrategia de modernización, enmarcadas en las nuevas tendencias de un proceso de globalización y de la reducción de los costos de transformación de las instituciones bancaria. Las fusiones bancarias que se han dado en Venezuela a partir de 1994 hasta la actualidad son por absorción destacándose, en una primera fase las fusiones propiciadas por los grandes grupos financieros existentes entre sus empresas filiales para conformar los bancos universales, en una segunda fase fusiones entre diferentes grupos financieros; en algunos casos para conformar las megafusiones. La tendencia de este proceso es que se disminuyan las instituciones financieras especializadas afectándose los bancos comerciales y las entidades de ahorro y préstamo, a favor de la creación de la banca universal y los conglomerados financieros.

  8. Defesa dos direitos humanos: sistemas regionais

    Directory of Open Access Journals (Sweden)

    Hélio Bicudo

    2003-04-01

    Full Text Available O texto discorre sobre a institucionalização dos sistemas de promoção dos Direitos Humanos, ao longo do século XX. Tomando a Declaração Universal dos Direitos do Homem, de 1948, como base e ponto de partida, o articulista aborda as três principais vertentes dos sistemas de promoção desses direitos: a européia, a americana e a africana. A evolução de cada uma delas descrita analógica e epistemologicamente, de forma a salientar singularidades sem perder de vista as influências recíprocas ou mesmo as determinantes próprias do contexto espaço-social. Para finalizar, o articulista destaca a importância do Tribunal Penal Internacional no estabelecimento de uma justiça ecumênica. Concomitantemente, alerta para o perigo contido na ameaça de os EUA não o ratificarem.The text underlines the institutional character acquired by the main systems to promote Human Rights in the twentieth century. Taking the Universal Human Rigths Declaration, of 1948, as the basis for analysis, the author brings up three different approaches to promote these rights: the European, the American and the African. The evolution of each of them is described using its procedure as a basic reference. Besides, an analogical analysis, brings to the fore singularities, without ignoring reciprocal influences dictated by particular contexts, though. The author stresses the importance of the International Penal Court, as a means to establish ecumenical justice. At the same time, he reminds the reader of the risks implicit in the possible non-ratification of the IPC by United States.

  9. As aljamias hebraicas, sistemas de escrita híbridos

    Directory of Open Access Journals (Sweden)

    Aléxia Teles Duchowny

    2015-05-01

    Full Text Available As aljamias hebraicas são o resultado da mistura do sistema de escrita latino e do sistema de escrita hebraico, juntamente à criação de regras intrínsecas a essa nova escrita. Objetiva-se compreendê-las com maior clareza, tomando-se como ponto de referência o manuscrito judaico do século 15 De magia (Ms. Laud Or. 282, Bodleian Library. Para tal, o sistema de chegada – a aljamia hebraica – será comparada com os sistemas de partida – o hebraico e o português. Verifica-se que o sistema latino é o mais redundante, o mais completo, porém o menos econômico dos sistemas de escrita. Já o hebraico é o menos redundante, o menos completo e o mais econômico dentre eles, ficando a aljamia em um ponto intermediário entre os dois extremos. Sistema híbrido, porém eficaz meio de comunicação, permitindo a legibilidade satisfatória do texto aljamiado.

  10. El sistema nacional de salud en el Perú

    Directory of Open Access Journals (Sweden)

    Francisco Sánchez-Moreno

    Full Text Available Un grupo de profesionales en el Perú, conocedores de sistemas nacionales de salud, conformado desde 1975, comenzó un proceso que llevó al país a ser el primero en América del Sur en iniciar la organización moderna de este sistema. El avance pionero que significó la creación del Sistema Nacional de Servicios de Salud en 1978 ocurrió antes de las reformas de los sistemas de salud en Chile (1980, Brasil (1990, Colombia (1993 y Ecuador (2008. El alentador inicio tuvo vaivenes reformistas permanentes desde entonces, con evolución negativa por falta de una política de Estado. Las características actuales del sistema peruano son el desempeño ineficiente y la discontinuidad, sin evaluación alguna, lo que determina un gran atraso con relación a los sistemas de salud de América. En el siglo XXI se han desaprovechado importantes esfuerzos técnicos para modernizar el sistema y sus funciones. El futuro es preocupante y el papel de las nuevas generaciones será decisivo.

  11. Transitorios electromecánicos en sistemas de potencia industriales

    Directory of Open Access Journals (Sweden)

    Héctor M. Sánchez García

    2015-01-01

    Full Text Available Los estudios de estabilidad transitoria o transitorios electromecánicos son frecuentemente ignorados en el ámbito de los sistemas eléctricos de potencia industriales, a pesar de que la información obtenida a partir de dichos estudios resulta fundamental para entender el comportamiento dinámico de sistemas eléctricos de potencia de cualquier tipo, así como para identificar la necesidad de acciones correctivas y evaluar su efectividad sobre la seguridad operativa del sistema eléctrico. En este artículo se analiza el comportamiento dinámico de un sistema de potencia industrial con generación propia, interconectado a la red pública del sistema de transmisión, al ocurrir una falla en el transformador de interconexión entre ambos sistemas. El análisis reportado en el presente trabajo resultó ser una parte fundamental para entender el porqué de la actuación de las protecciones de baja y alta frecuencia de los generadores y en consecuencia el colapso total del sistema industrial.

  12. Implicaciones Jurídicas del Sistema Electoral

    Directory of Open Access Journals (Sweden)

    Hugo Picado León

    2008-06-01

    Full Text Available Este artículo argumenta acerca de la importancia que tiene para el derecho electoral el conocimiento de la teoría sobre los sistemas electorales y sus elementos. En primer término, se procura definir el sistema electoral, tanto en su sentido amplio como en su sentido estricto. La segunda sección se refiere a la relación de la teoría sobre el sistema electoral para el derecho. En el siguiente apartado se describen los efectos del sistema electoral sobre el sistema de partidos y sobre la representación. En la cuarta y la quinta sección se explican los elementos del sistema electoral en sentido estricto y la administración electoral, respectivamente. Finalmente, en la sexta sección se mencionan algunas líneas de análisis referente al diseño y reforma del sistema electoral

  13. Evaluación de los sistemas comerciales automatizados VITEK 2 y API 20NE para la identificación de organismos del complejo Burkholderia cepacia aislados de muestras clínicas Evaluation of commercial systems VITEK 2 and API 20NE for identification of Burkholderia cepacia complex bacteria from clinical samples

    Directory of Open Access Journals (Sweden)

    Sebastián Oderiz

    2011-09-01

    Full Text Available Las especies del complejo Burkholderia cepacia (CBC son capaces de causar infecciones crónicas del tracto respiratorio en pacientes con fibrosis quística y en otros individuos inmunocomprometidos. La mayoría de estas especies exhiben alta resistencia a la terapia antibiótica, lo que genera la necesidad de una detección rápida y precisa para poder implementar estrategias de control adecuadas. En este trabajo se utilizó la técnica de reacción en cadena de la polimerasa (PCR para amplificar el gen recA (PCR-recA, con el fin de identificar microorganismos pertenecientes al CBC. Con este método molecular como referencia, se evaluó la sensibilidad (S y la especificidad (E de dos sistemas de identificación comerciales automatizados, VITEK 2 y API 20NE (bioMérieux®, así como también el valor de las pruebas bioquímicas manuales más representativas para la identificación de estos microorganismos. El método VITEK 2 presentó una S del 71,1 % y una E del 100 %; para el método API 20NE, estos valores fueron 69,7 % y 90,2 %, respectivamente. En cuanto a las pruebas fenotípicas manuales, los resultados obtenidos fueron más heterogéneos, lo que posiblemente se deba a que estas bacterias podrían sufrir presión selectiva para sobrevivir en pacientes crónicos y perder factores fenotípicos característicos. La técnica de PCR-recA resultó de fácil implementación, por lo que cabe considerar a esta técnica de identificación como una opción viable, aun en laboratorios de diagnóstico clínico de mediana complejidad.Species belonging to the Burkholderia cepacia complex (BCC are capable of causing chronic respiratory tract infections in patients suffering from cystic fibrosis as wel as in immunocompromised individuals. Most of these species are highly resistant to antibiotic therapy, generating the need for their rapid and accurate detection for the proper treatment and clinical management of these patients. In this wok, the polymerase

  14. Desarrollo de sistemas y lentes holográficas

    OpenAIRE

    Atencia Carrizo, Jesús; Quintanilla Montón, Manuel; Casas Peláez, Justiniano

    2008-01-01

    Desarrollo de una formulación completa del comportamiento como sistemas formadores de imagen de lentes holográficas biaxiales, tanto en la aproximación del tercer orden como para el trazado de rayos, incluyendo el efecto de pupilas fuera de las lentes y de las láminas de vidrio soporte de la emulsión holográfica. Se ha extendido el estudio a sistemas compuestos y se ha aplicado a la corrección de sistemas reales de dos lentes. Se ha comprobado que dos lentes biaxiales pegadas operando como si...

  15. Control por planos deslizantes adaptativos de un sistema multivariable desacoplado

    OpenAIRE

    Giraldo Suárez, Eduardo

    2007-01-01

    Se presenta un esquema para la aplicación del control por planos deslizantes usando identificación paramétrica adaptativa de un sistema multivariable. En el diseño del controlador se considera que el sistema es desacoplado y que los acoples se pueden considerar como perturbaciones. Las pruebas sobre el desempeño del controlador se realizan sobre un sistema multivariable de segundo orden simulado sobre un computador analógico. We present a sliding mode control using parametric estimation of...

  16. La familia como sistema social: Conyugalidad y parentalidad

    OpenAIRE

    Hugo Cadenas

    2015-01-01

    El presente artículo aborda el concepto de familia en el marco de la teoría de sistemas sociales. A partir de un análisis crítico de las reflexiones de algunos autores que siguen esta tradició n teórica, se propone un concepto de familia moderna como un sistema funcionalmente diferenciado. A partir de esta decisión teórica, se define la comunicación íntima como característica de la familia y a la distinción entre parientes como código basal del sistema.

  17. IDB-9: Sistemas nacionales Title: IDB-9: Country Systems

    OpenAIRE

    Santiago Schiavo-Campo; Laura Atuesta; Agustina Schijman; Monika Huppi

    2013-01-01

    El Banco Interamericano de Desarrollo (BID, o Banco), en su Noveno Incremento General de Recursos (BID-9), se comprometió a mejorar los sistemas nacionales para aumentar su uso en los programas financiados con recursos del Banco. Este informe analiza la implementación de tal compromiso. Evalúa la Estrategia de Sistemas Nacionales desarrollada a fines de 2009 para tal propósito, la calidad de los diagnósticos fiduciarios que respaldan las oportunidades para aumentar el uso de los sistemas naci...

  18. Sistema de guía por voz en interiores

    OpenAIRE

    Martín-Calderín de la Villa, Mariana

    2013-01-01

    En los últimos años se ha producido un incremento del interés académico e industrial en los sistemas de localización para personas y objetos. Este crecimiento queda reflejado en la creación de aplicaciones comerciales, donde se ha recogido un aumento de la demanda en los sistemas de posicionamiento en interiores para las personas. En particular, dichos sistemas de localización en interiores, están teniendo una repercusión muy importante en fábricas, hospitales, grandes almacenes, entornos muy...

  19. Sistema bancario y de producción en Argentina

    OpenAIRE

    Víctor Fernández; Carolina Lauxmann; Julio Tealdo

    2012-01-01

    Los cambios macroeconómicos en la Argentina posteriores a la crisis 2001 abrieron un interesante escenario para indagar si las formas de valorización financiera del capital imperantes durante los años noventa han podido ser reemplazadas por formas acumulativas ligadas a la inversión productiva. Trabajando con el concepto de Sistema Social de Producción (ssp), y su adaptación para su uso en escenarios periféricos, y advirtiendo la importancia que adquiere el Sistema Financiero en dicho sistema...

  20. Consideraciones sobre los sistemas electorales a principios del siglo XXI

    OpenAIRE

    Humberto Nogueira Alcalá

    2007-01-01

    El artículo realiza un análisis sobre los diversos componentes de un sistema electoral, poniendo énfasis en la conformación de los distritos electorales, los tipos de candidaturas, el método de escrutinio y la barra o umbral de representación, considerando que si bien los sistemas electorales influyen en el sistema de partidos políticos, ellos no son determinantes en su conformación, producto de la existencia de otros factores culturales, históricos y realidades socioeconómicas...

  1. I RECETTORI METABOTROPICI PER IL GLUTAMMATO NEL SISTEMA IMMUNITARIO

    OpenAIRE

    Fazio, Francesco

    2011-01-01

    Sebbene normalmente siano anatomicamente indipendenti, il sistema nervoso centrale e il sistema immunitario danno vita ad una varietà di risposte coordinate al pericolo attraverso comuni messaggeri chimici. Ad esempio, il sistema nervoso simpatico può alterare l’equilibrio Th1\\Th2 attraverso la stimolazione dei recettori β adrenergici, mentre l’istamina può essere modulata dalla produzione di citochine Th1 e Th2 attraverso una differente espressione di recettori H1 e H2. La recente scopert...

  2. Policentrismo urbano y ajuste del sistema de ciudades en Galicia

    OpenAIRE

    Precedo Ledo, Andrés; Míguez Iglesias, Alberto

    2012-01-01

    El sistema urbano de Galicia constituye un caso interesante para estudiar la evolución y ajuste de un sistema policéntrico de ciudades a la etapa postindustrial, así como su apertura al sistema urbano global. En este estudio partimos de la hipótesis de que las ciudades medias pueden posicionarse como ciudades subglobales mediante procesos de innovación y creatividad, que aportan una ventaja comparativa de competitividad basada en la calidad de vida. También en esto las ciudades...

  3. Consideraciones sobre los sistemas electorales a principios del siglo XXI

    OpenAIRE

    Humberto Nogueira Alcalá

    2007-01-01

    El artículo realiza un análisis sobre los diversos componentes de un sistema electoral, poniendo énfasis en la conformación de los distritos electorales, los tipos de candidaturas, el método de escrutinio y la barra o umbral de representación, considerando que si bien los sistemas electorales influyen en el sistema de partidos políticos, ellos no son determinantes en su conformación, producto de la existencia de otros factores culturales, históricos y realidades socioeconómicas...

  4. Sistemas de Información en Salud

    OpenAIRE

    López, Heriberto Díaz

    2012-01-01

    Los Sistemas de Información en Salud (SIS) constituyen el núcleo principal de soporte para la toma de decisiones en las instituciones sanitarias. El sistema integrado de información en salud tiene por objetivo normalizar, integrar y organizar toda la información en salud disponible en sus sistemas de información, así como la distribución de la información de la forma más conveniente, para facilitar la toma de decisiones. 1-5

  5. Sistema cartográfico oficial en Marruecos

    OpenAIRE

    2016-01-01

    EL objetivo de este proyecto final de grado es crear un programa que será capaz de transformar coordenadas entre el sistema cartográfico marroquí al sistema internacional WGS84, por lo tanto tenemos seguir ciertos pasos para conseguir el objetivo. El sistema cartográfico marroquí opta con los siguientes parámetros: Elipsoide Clarke1880 ; Proyección cónica conforme de Lambert en cuatro zonas ; Proyección UTM en la Sahara Marroquí por fines Cartográficos ; Punto fundamental Merchich, dirección ...

  6. SISTEMA INTEGRADO DE GESTIÓN EN BODEGAS DA ROCHA

    OpenAIRE

    Aneiros-Pardo, Héctor

    2013-01-01

    El objetivo de este Trabajo Fin de Master es tratar de diseñar e implantar un Sistema Integrado de Gestión basado en las normas ISO 9001, ISO 14001 y OSHAS 18001 en una empresa ficticia que abarque tanto los procesos técnicos como de organización, con el objetivo final de obtener la certificación del sistema de gestión en base a las distintas normas. El Sistema Integrado de Gestión trata de controlar los riesgos de seguridad y salud laboral, ambientales y la mejora continua de ...

  7. Sampling algorithms

    CERN Document Server

    Tillé, Yves

    2006-01-01

    Important progresses in the methods of sampling have been achieved. This book draws up an inventory of methods that can be useful for selecting samples. Forty-six sampling methods are described in the framework of general theory. This book is suitable for experienced statisticians who are familiar with the theory of survey sampling.

  8. Balanced sampling

    NARCIS (Netherlands)

    Brus, D.J.

    2015-01-01

    In balanced sampling a linear relation between the soil property of interest and one or more covariates with known means is exploited in selecting the sampling locations. Recent developments make this sampling design attractive for statistical soil surveys. This paper introduces balanced sampling

  9. Sample Design.

    Science.gov (United States)

    Ross, Kenneth N.

    1987-01-01

    This article considers various kinds of probability and non-probability samples in both experimental and survey studies. Throughout, how a sample is chosen is stressed. Size alone is not the determining consideration in sample selection. Good samples do not occur by accident; they are the result of a careful design. (Author/JAZ)

  10. Balanced sampling

    NARCIS (Netherlands)

    Brus, D.J.

    2015-01-01

    In balanced sampling a linear relation between the soil property of interest and one or more covariates with known means is exploited in selecting the sampling locations. Recent developments make this sampling design attractive for statistical soil surveys. This paper introduces balanced sampling

  11. Integración de sistema de monitorización Nagios con Twitter

    OpenAIRE

    Pérez Vera, Dolores Isabel

    2015-01-01

    Integración de sistema de monitorización Nagios con Twitter como sistema de notificación de eventos. Integració de sistema de monitorització Nagios amb Twitter com a sistema de notificació d'esdeveniments. Bachelor thesis for the Computer Science program on Computer networks.

  12. Integración de sistema de monitorización Nagios con Twitter

    OpenAIRE

    Pérez Vera, Dolores Isabel

    2015-01-01

    Integración de sistema de monitorización Nagios con Twitter como sistema de notificación de eventos. Integració de sistema de monitorització Nagios amb Twitter com a sistema de notificació d'esdeveniments. Bachelor thesis for the Computer Science program on Computer networks.

  13. 餐饮业含油废水污染现状及防治对策%Pollution Status and Prevention Countermeasures of Oily Waste Water in Catering Trade

    Institute of Scientific and Technical Information of China (English)

    于志强

    2015-01-01

    随着人民生活水平的提高、现代生活节奏的加快,餐饮业在大中城市不断发展壮大,由此带来的环境污染问题也日益突出。文章分析了我国餐饮业含油废水的污染现状及其成因,提出了相应的污染防治对策。%Along with the increasing of the people’s standard of living, the cadential expediting of the modern living and the great development of catering trade in the medium and big cities, therefore the problem of environmental polution extrudes increasingly. The paper analyzes the pol ution status and its cause of formation of oily waste water in catering trade;and puts forward the relevant countermeasures on pol ution prevention.

  14. 基于含油废水处理的电催化膜反应器优化设计及性能研究%Optimization of an electro-catalytic membrane reactor for oily wastewater treatment

    Institute of Scientific and Technical Information of China (English)

    张秀伟; 王虹; 杨阳; 李建新; 王同华

    2012-01-01

    以负载纳米TiO2的电催化膜为阳极,辅助电极为阴极,构成电催化膜反应器用于含油废水处理.考察了电极间距、电解质浓度、电流密度、空时速率、pH和温度对电催化膜反应器降解效果即含油废水化学需氧量(COD)去除率的影响.根据单因素实验分析结果,采用响应面法对电极间距、电解质浓度、pH和温度四个参数进行优化,得出最佳参数为:电极间距43.1mm,电解质浓度14.3 g/L,pH=6.3,温度32.5℃.在电流密度0.312mA/cm2,空时速率15.8 h-1的条件下,电催化膜反应器处理200mg/L含油废水COD去除率为97.54%,能耗为0.75 kWh/m3.%A electro-catalytic membrane was used as an anode, and stainless steel tube as a cathode, and both electro-catalytic membrane and stainless steel tube were connected by a DC regulated power supply to constitute an electro-catalytic membrane reactor (ECMR), which was employed to treat the oily water. This research investigated the influence of the rector' s parameters such as electrode spacing, the concentration of electrolyte, current density, liquid hourly space velocity, solution pH and temperature on the removal rate of oily wastewater chemical oxygen demand (COD). The electrode spacing, the concentration of electrolyte, the solution pH and temperature were investigated through response surface method according to the single factor analysis of experimental results. Results showed the optimum conditions for the membrane reactor were the electrode spacing of 43. 1 mm, the concentration of electrolyte of 14. 3 g/L, pH of 6. 3 and temperature of 32. 5 ℃. It was also found that the COD removal rate for the ECMR to treat 200 mg/L oily wastewater was 97. 54% at current density of 0. 312 mA/cm2 and liquid hourly space velocity of 15. 8 h-1. It was close to the predicted removal rate of 98. 75%. From the model the energy consumption was 0. 75 kWh / m3 and 3. 30 kWh/kg(COD) during the treatment of 200 mg/L oily wastewater.

  15. Slice Sampling

    CERN Document Server

    Neal, R M

    2000-01-01

    Markov chain sampling methods that automatically adapt to characteristics of the distribution being sampled can be constructed by exploiting the principle that one can sample from a distribution by sampling uniformly from the region under the plot of its density function. A Markov chain that converges to this uniform distribution can be constructed by alternating uniform sampling in the vertical direction with uniform sampling from the horizontal `slice' defined by the current vertical position, or more generally, with some update that leaves the uniform distribution over this slice invariant. Variations on such `slice sampling' methods are easily implemented for univariate distributions, and can be used to sample from a multivariate distribution by updating each variable in turn. This approach is often easier to implement than Gibbs sampling, and more efficient than simple Metropolis updates, due to the ability of slice sampling to adaptively choose the magnitude of changes made. It is therefore attractive f...

  16. Facial Demodex infection among new medical students with oily skin in Xingtai%邢台市某医学院校新生油性皮肤者面部蠕形螨感染调查

    Institute of Scientific and Technical Information of China (English)

    韩艳娟

    2011-01-01

    An adhesive tape test was used to study the current status of human Demodex infections among 308 new students of XingTai Medical College with oily skin. The total infection rate was 34.4%. Demodex folliculorum accounted for 50.9% of infections, Demodex brevis accounted for 20.8%, and mixed infections accounted for 28. 3% of infections.Ninety-four-point-three percent of infections were mild. The site of infection was more often the nose than the forehead.New students with oily skin had a relatively high rate of Demodex infections but most of those infections were mild.%采用透明胶纸粘帖法对邢台医学高等专科学校308名油性皮肤新生面部蠕形螨感染情况进行调查,结果检出蠕虫螨感染者106人,总感染率34.4%,单纯毛囊蠕形螨感染占50.9%(54/106),单纯皮脂蠕形螨感染占20.8%(22/106),混合感染占28.3%(30/106);轻度感染占94.3%(100/106).鼻侧感染率54.7%(58/106)较额部(47.1%)和鼻尖(35.8%)感染率高.该校新生油性皮肤者人体蠕形螨感染率较高,但以轻度感染为主.

  17. Desarrollo de un sistema automático de medida para el control del consumo en sistemas empotrados

    OpenAIRE

    Fernández Gil, José

    2014-01-01

    El Grupo de Diseño Electrónico y Microelectrónico de la Universidad Politécnica de Madrid -GDEM- se dedica, entre otras cosas, al estudio y mejora del consumo en sistemas empotrados. Es en este lugar y sobre este tema donde el proyecto a exponer ha tomado forma y desarrollo. Según un artículo de la revista online Revista de Electrónica Embebida, un sistema empotrado o embebido es aquel “sistema controlado por un microprocesador y que gracias a la programación que incorpora o que se le debe...

  18. Sampling for Beryllium Surface Contamination using Wet, Dry and Alcohol Wipe Sampling

    Energy Technology Data Exchange (ETDEWEB)

    Kerr, Kent

    2004-12-17

    This research project was conducted at the National Nuclear Security Administration's Kansas City Plant, operated by Honeywell Federal Manufacturing and Technologies, in conjunction with the Safety Sciences Department of Central Missouri State University, to compare relative removal efficiencies of three wipe sampling techniques currently used at Department of Energy facilities. Efficiencies of removal of beryllium contamination from typical painted surfaces were tested by wipe sampling with dry Whatman 42 filter paper, with water-moistened (Ghost Wipe) materials, and by methanol-moistened wipes. Test plates were prepared using 100 mm X 15 mm Pyrex Petri dishes with interior surfaces spray painted with a bond coat primer. To achieve uniform deposition over the test plate surface, 10 ml aliquots of solution containing 1 beryllium and 0.1 ml of metal working fluid were transferred to the test plates and subsequently evaporated. Metal working fluid was added to simulate the slight oiliness common on surfaces in metal working shops where fugitive oil mist accumulates over time. Sixteen test plates for each wipe method (dry, water, and methanol) were processed and sampled using a modification of wiping patterns recommended by OSHA Method 125G. Laboratory and statistical analysis showed that methanol-moistened wipe sampling removed significantly more (about twice as much) beryllium/oil-film surface contamination as water-moistened wipes (p< 0.001), which removed significantly more (about twice as much) residue as dry wipes (p <0.001). Evidence for beryllium sensitization via skin exposure argues in favor of wipe sampling with wetting agents that provide enhanced residue removal efficiency.

  19. Sampling for Beryllium Surface Contamination using Wet, Dry and Alcohol Wipe Sampling

    Energy Technology Data Exchange (ETDEWEB)

    Kerr, Kent [Central Missouri State Univ., Warrensburg, MO (United States)

    2004-12-01

    This research project was conducted at the National Nuclear Security Administration's Kansas City Plant, operated by Honeywell Federal Manufacturing and Technologies, in conjunction with the Safety Sciences Department of Central Missouri State University, to compare relative removal efficiencies of three wipe sampling techniques currently used at Department of Energy facilities. Efficiencies of removal of beryllium contamination from typical painted surfaces were tested by wipe sampling with dry Whatman 42 filter paper, with water-moistened (Ghost Wipe) materials, and by methanol-moistened wipes. Test plates were prepared using 100 mm X 15 mm Pyrex Petri dishes with interior surfaces spray painted with a bond coat primer. To achieve uniform deposition over the test plate surface, 10 ml aliquots of solution containing 1 beryllium and 0.1 ml of metal working fluid were transferred to the test plates and subsequently evaporated. Metal working fluid was added to simulate the slight oiliness common on surfaces in metal working shops where fugitive oil mist accumulates over time. Sixteen test plates for each wipe method (dry, water, and methanol) were processed and sampled using a modification of wiping patterns recommended by OSHA Method 125G. Laboratory and statistical analysis showed that methanol-moistened wipe sampling removed significantly more (about twice as much) beryllium/oil-film surface contamination as water-moistened wipes (p< 0.001), which removed significantly more (about twice as much) residue as dry wipes (p <0.001). Evidence for beryllium sensitization via skin exposure argues in favor of wipe sampling with wetting agents that provide enhanced residue removal efficiency.

  20. Costos del sistema mecanizado de transplante y trasiego de cepellones

    National Research Council Canada - National Science Library

    Tomasa Rodríguez Hernández; Héctor R. de las Cuevas Milán

    2004-01-01

    En el presente trabajo se analizan los costos totales por unidad de área, del sistema mecanizado de transplante y trasiego de cepellones, para diferentes combinaciones de conjunto de transplante y transporte...

  1. Riesgos del trabajo en el sistema de gestion de calidad

    National Research Council Canada - National Science Library

    Ulloa-Enriquez, Medardo Angel

    2012-01-01

    El objetivo del presente articulo es compartir una metodologia adecuada para identificar e incorporar los riesgos de salud y seguridad al sistema de gestion de calidad certificado bajo la Norma ISO 9001...

  2. Sistemas adhesivos en Odontología Restauradora

    Directory of Open Access Journals (Sweden)

    María Natalia Mandri

    Full Text Available Los sistemas adhesivos actuales han permitido mejorar los procedimientos clínicos tanto en la evolución de los componentes y su mecanismo de acción, como en la disminución del tiempo operatorio de aplicación de cada uno de ellos, brindando una eficacia clínica aceptable y predecible. Esta demanda de efectividad, ha dado lugar a una gran variedad de sistemas adhesivos, que en muchas ocasiones, no se emplean en la práctica profesional. El propósito de este trabajo es realizar una revisión de los sistemas adhesivos a fin de brindar la información necesaria y secuencia de aplicación, que permita al odontólogo realizar una adecuada selección y utilización del sistema, de acuerdo a la situación clínica

  3. Traductor para Describir Sistemas de Información

    Directory of Open Access Journals (Sweden)

    Emiro Muñoz Jerez

    2011-01-01

    Full Text Available En la universidad y en las empresas, siempre se nos ha presentado un paradigma en el cual el mundo está compuesto por objetos, pero si se observa con detenimiento que la realidad no son simplemente objetos sino sistemas compuestos por objetos los cuales tienen algo en común que los relaciona. ¿Pero como describir sistemas?. En la actualidad no existe un traductor que permita describir sistemas sino solo estructuras u objetos. Para implementar estructuras están los lenguajes 3GL, Java, C o el mismo SQL. Para objetos está OQL. Aquí en este artículo lo que se pretende es especificar los detalles de implementación de un traductor que permita describir sistemas y que a su vez este traductor pueda ser conectado con un motor de Bases de Datos Orientado a Objetos o Relacional.

  4. Sistema de prototipos para control numérico

    National Research Council Canada - National Science Library

    Abdón Sánchez Sossa

    2011-01-01

    .... La conformaci6n del Grupo de Control Numérico Computarizado de Ingenierfa de Sistemas en 1987, pionero, al permitir canalizar y consolidar en tres cursos electivos interdisciplinarios una respuesta a las inquietudes...

  5. Interacciones radiculares en sistemas agroforestales: mecanismos y opciones de manejo

    National Research Council Canada - National Science Library

    Casanova, F; Ramirez, L; Solorio, F

    2007-01-01

    Los sistemas agroforestales (SAF) son una forma de uso de la tierra en donde las lenosas interactuan con los cultivos y/o animales, con la finalidad de diversificar y optimizar la produccion de manera sostenida...

  6. Sistema fotovoltaico de iluminación solar

    Directory of Open Access Journals (Sweden)

    Víctor Hugo Benítez Baltazar

    2013-12-01

    Full Text Available El artículo es el resultado de un trabajo de investigación enfocado al uso de sistemas fotovoltaicos para la iluminación por medio de diodos emisores de luz tipo LED. Se busca reducir el consumo energético mediante la implementación de un sistema de iluminación basado en LED hasta en un 80%, donde la fuente primaria de energía es el Sol. Se demuestra la viabilidad de los sistemas solares de iluminación LED mediante la construcción de un prototipo. Los sistemas de iluminación fotovoltaicos son una alternativa real para ahorrar energía eléctrica e igualmente representan un campo de investigación abierto en muchos sentidos.

  7. EL SISTEMA FINANCIERO DE ANGOLA Y ESTRATEGIAS DE FUTURO

    National Research Council Canada - National Science Library

    Casanovas Ramón, M; Jesus Fortes, A. de F

    2009-01-01

    ... análisis interno y externo del entorno competitivo del sistema financiero angoleño aplicando la Matriz DAFO o SWOT, con el objetivo de formular estrategias concretando, en una tabla resumen, la...

  8. Nuevos sistemas de frecuencia intermedia para el IAR

    Science.gov (United States)

    Olalde, J. C.; Perilli, D.; Larrarte, J. J.

    Se presenta el diagrama en bloques de los nuevos sistemas de Frecuencia Intermedia para los dos radiómetros instalados en el IAR. Entre las características más importantes del sistema podemos mencionar la posibilidad de conectar cualquiera de las dos antenas a los ``backend" disponibles: analizador espectral de alta resolución (META II) de 0,05 Hz, autocorrelador de 1008 canales y contínuo. Se incorporan al sistema nuevos sintetizadores de frecuencia implementados con PLL y la moderna técnica de síntesis digital directa. Por último, el conjunto del sistema es susceptible de ser configurado por las computadoras de adquisición de datos, supervisadas por otra, que entrega el estado de funcionamiento actual y evita la selección de configuraciones incorrectas por parte del usuario.

  9. Inmunología tumoral y neoplasias del sistema inmune

    OpenAIRE

    Sen Fernández, María Luz de la; Sempere Ortells, José Miguel; Marco de la Calle, Francisco Manuel; Vázquez Araujo, Begoña

    2012-01-01

    Inmunología tumoral: vigilancia inmunológica, antígenos tumorales, respuesta inmune antitumoral, escape tumoral. Inmunología y diagnóstico. Inmunoterapia. Neoplasias del sistema inmune: leucemias y linfomas.

  10. Inmunología tumoral y neoplasias del sistema inmune

    OpenAIRE

    Sen Fernández, María Luz de la; Sempere Ortells, José Miguel; Marco de la Calle, Francisco Manuel; Vázquez Araujo, Begoña

    2012-01-01

    Inmunología tumoral: vigilancia inmunológica, antígenos tumorales, respuesta inmune antitumoral, escape tumoral. Inmunología y diagnóstico. Inmunoterapia. Neoplasias del sistema inmune: leucemias y linfomas.

  11. Sistema de salud en Colombia: una revision sistematica de literatura

    National Research Council Canada - National Science Library

    Gorbanev, Iouri; Merlano-Porras, Carlos Andres

    2013-01-01

    Problema: el Sistema General de Seguridad Social en Salud de Colombia, es objeto de criticas por diferentes medios de opinion debido a sus altos costos de transaccion, baja competitividad y eficiencia...

  12. Estudio del sistema NADP/tiorredoxina de trigo

    OpenAIRE

    2002-01-01

    En este trabajo se ha desarrollado un estudio del sistema NADP/Tiorredoxna constituido por una Tiorredoxina H una RADPH Tiorredoxina reductosa (NTR), fundamentalmente en la semilla de trigo. Los puntos principales del estudio han sido: ... nt-family: 'Ti

  13. El sistema educativo como yacimiento de empleo

    Directory of Open Access Journals (Sweden)

    Antoni J. COLOM CAÑELLAS

    2009-11-01

    Full Text Available RESUMEN: Tras realizar una revisión al concepto de «Nuevo yacimiento de empleo» (origen, desarrollo, definición, funcionalidad, etc., se plantean sus posibilidades en el campo educativo, dando lugar a dos perspectivas: la formación necesaria para desarrollar yacimientos de empleo y, considerar a la educación, al sistema educativo, como un nuevo yacimiento de empleo. Tomando esta segunda acepción, se realiza un estudio empírico de las posibilidades que oferta el sistema educativo de las Islas Baleares como nuevo yacimiento de empleo. En él encontramos posibilidades de empleo en tareas de servicios y en las actividades complementarias escolares, llegando a la conclusión de que el sistema educativo de las Islas Baleares (que sólo afecta a unos 850.000 habitantes, encierra una capacidad económica muy significativa (sobre los 20 millones de euros cuyo capital podría desarrollarse socialmente si se cumplimentasen una serie de exigencias que analizamos en nuestro trabajo.ABSTRACT: After revising the concept «New source for employment» (origin, development, definition functionality, etc., its possibilities in the field of education are suggested, giving way to two perspectives: the training needed to develop sources for employment and, to consider education, the education system itself, as a new source for employment. Taking into consideration the latter proposal, we have carried out an empirical study of the possibilities offered by the system of education in the Balearic Islands, as a new source for employment. In it we can find possibilities for employment in the service sector and in the complementary activities of schools, thereby reaching the conclusion that the educational system of the Balearic Islands (which only affects around 850.000 inhabitants, entails a very significant economy capacity (of about 20 millions euros, which could be developed socially if a series of requirements that we are analysing in our work are met

  14. Envejecimiento del sistema cardiovascular Cardiovascular system aging

    Directory of Open Access Journals (Sweden)

    José M Ocampo

    2005-08-01

    Full Text Available El envejecimiento del sistema cardiovascular está asociado con un número característico de cambios a nivel bioquímico, histológico y morfológico. Sin embargo, no todas las modificaciones presentadas se asocian con deterioro en la función. Entre los cambios a nivel cardiaco se tienen: disminución en el número de miocitos y en las células del sistema de conducción cardiaca, desarrollo de fibrosis, cambios en el transporte de calcio a través de las membranas y disminución del cronotropismo, inotropismo y lusitropismo mediados por estímulo b-adrenérgico. A nivel vascular, hay incremento en la rigidez de la pared de las arterias, con aumento en la velocidad de la onda de pulso, disfunción endotelial y disminución de la vasodilatación mediada por estímulo b-adrenérgico. Durante el reposo el sistema cardiovascular es capaz de desarrollar mecanismos adaptativos eficientes, pero en situaciones de estrés como el ejercicio, los cambios asociados con el envejecimiento se hacen evidentes ya que está disminuida la capacidad para obtener la frecuencia cardiaca máxima, está incrementada la postcarga y hay disminución de la contractilidad intrínseca. Por lo anterior, los ancianos deben utilizar al máximo el mecanismo de Frank-Starling para mantener el gasto cardiaco. Los cambios estructurales y funcionales asociados con el envejecimiento cardiovascular, disminuyen de forma significativa el umbral en el cual las enfermedades cardiacas llegan a ser evidentes, y deben ser conocidos por el personal de salud encargado de cuidar a los ancianos.Cardiovascular aging is associated with characteristic biochemical, histological and morphological changes. Nevertheless, these changes are not necessarily associated to a deterioration in its function. Among the cardiac changes found, there is a reduction in the number of myocytes and of the cardiac conduction system cells, development of fibrosis, changes in the trans-membrane calcium transport and a

  15. Drenaje torácico cerrado. Sistema de recogida no reutilizable: Pleur-evac®

    OpenAIRE

    Estrada Masllorens, Joan Maria; Galimany Masclans, Jordi; Sarria Guerrero, José Antonio

    2012-01-01

    Funcionamiento del sistema desechable de recogida Pleur-evac®. Se trata de un sistema compacto de recogida de drenaje con sello de agua de manejo fácil construido sobre la base del sistema convencional de montaje de drenaje de aspiración de tres botellas. Este sistema se basa en el utilizado en 1876 por Gotthard Bülau para el tratamiento de empiemas y que ha dado nombre a los sistemas de recogida...

  16. SISTEMAS INMUNES ALTERNATIVOS - Alternative Immune Systems

    Directory of Open Access Journals (Sweden)

    Cadavid Gutierrez Luis Fernando

    2011-12-01

    Full Text Available El sistema inmune en animales es una red compleja de moléculas, células y tejidos que de manera conjunta mantienen la integridad fisiológica y genética de los organismos. Convencionalmente se ha considerado la existencia de dos clases de inmunidad, la innata y la adaptativa. La primera es ancestral, con variabilidad limitada y baja discriminación, mientras que la segunda es altamente variable, específica y restringida a vertebrados mandibulados. La inmunidad adaptativa se basa en receptores de antígeno que se rearreglan somáticamente para generar una diversidad casi ilimitada de moléculas. Este mecanismo de recombinación somática muy probablemente emergió como consecuencia de un evento de transferencia horizontal de transposones y transposasas bacterianas en el ancestro de los vertebrados mandibulados. El reciente descubrimiento en vertebrados no mandibulados e invertebrados de mecanismos alternativos de inmunidad adaptativa, sugiere que en el transcurso de la evolución distintos grupos animales han encontrado soluciones alternativas al problema del reconocimiento inmunológico. Palabras claves: Sistema inmune, evolución, VLR, Dscam, Alorreconocimiento ABSTRACT The immune system in animals is a complex network of molecules, cells and tissues that coordinately maintain the physiological and genetic integrity of the organism. Traditionally, two classes of immunity have been considered, the innate immunity and the adaptive immunity. The former is ancestral, with limited variability and low discrimination. The latter is highly variable, specific and limited to jawed vertebrates. Adaptive immunity is based on antigen receptors that rearrange somatically to generate a nearly unlimited diversity of molecules. Likely, this mechanism of somatic recombination arose as a consequence of a horizontal transfer of transposons and transposases from bacterial genomes in the ancestor of jawed vertebrates. The recent discovery in jawless

  17. Estratégias para luz natural: sistemas inovadores.

    Directory of Open Access Journals (Sweden)

    Juliana Saiter Garrocho

    2007-07-01

    Full Text Available Diversos sistemas, estratégias e componentesinovadores de alta tecnologia paraa otimização do uso da luz natural noprojeto de arquitetura têm se desenvolvidoatualmente, principalmente na EuropaCentral, nos Estados Unidos e na Austrália.Este artigo apresenta algumas dessasestratégias descrevendo suas principaiscaracterísticas. Palavras-chave: luz natural, estratégias deprojeto, sistemas inovadores de alta tecnologia.

  18. El riego por chorro intermitente: un sistema prometedor

    Directory of Open Access Journals (Sweden)

    Hernando Buriticá

    2011-10-01

    Full Text Available A través de la historia el hombre se ha ingeniado varios sistemas para suplir las deficiencias de agua que las condiciones naturales de clima han impuesto para el desarrollo de la agricultura: desvió ríos, construyó canales y reservorios y entregó el agua a los cultivos empleando variados sistemas de riego. En este caso haremos referencia al riego por chorro intermitente.

  19. Una valoracion de la reforma del sistema bancario de China

    OpenAIRE

    Alicia Garcia-Herrero; Daniel Santabarbara

    2009-01-01

    No es extrano que una de las mayores y mas dinamicas economias del mundo tenga un sistema financiero que tambien lo sea. Los autores pasan revista a la evolucion del mismo haciendo hincapie en su aspecto cualitativo, concretamente en las reformas emprendidas para la modernizacion del sistema. Se estructuran las reformas recientes en tres bloques: reestructuracion bancaria, liberalizacion financiera y mejora de la regulacion y supervision bancarias. Aunque ya se han apreciado mejoras en cuanto...

  20. Sistema estomatognático y esquema corporal.

    OpenAIRE

    José Fernando Barreto

    2009-01-01

    Se presenta una visión integral del ser humano con el propósito de destacar las implicaciones que en la patología estomatognática tienen los conceptos de esquema corporal, sistema somatoestésico, sistema cinestésico entre otros, cuando se consideran las necesidades de rehabilitación estomatognática con el enfoque de rehabilitación neuroclusal.

  1. Sistema endocanabinoide: modificando los factores de riesgo cardiovascular

    OpenAIRE

    Feliciano Alfonso, John Edwin; Mendivil Anaya, Carlos Olimpo; Sierra Ariza, Iván Dario

    2014-01-01

    La necesidad de alcanzar un tratamiento óptimo para eltabaquismo, la obesidad y sus comorbilidades, conocidosfactores de riesgo cardiovascular, ha fomentado labúsqueda de objetivos terapéuticos novedosos. Es elcaso del sistema endocanabinoide, involucrado en diversosfenómenos fisiológicos entre los que se encuentranel refuerzo de ciertos comportamientos y la regulacióndel apetito.La sobreactivación de este sistema altera la homeostasiscorporal predisponiendo a dependencias o a un aumentoen la...

  2. El sistema español de I+D

    Directory of Open Access Journals (Sweden)

    López Facal, Javier

    1997-06-01

    Full Text Available Not available.Para centrar el lugar que ocupan las Bibliotecas y Centros de documentación en el Sistema de I+D, se resume la evolución de la política científica española desde los años cincuenta y se describe la estructura actual de este sistema, sus magnitudes principales y sus deficiencias.

  3. Sistema estomatognático y esquema corporal.

    Directory of Open Access Journals (Sweden)

    José Fernando Barreto

    2009-10-01

    Full Text Available Se presenta una visión integral del ser humano con el propósito de destacar las implicaciones que en la patología estomatognática tienen los conceptos de esquema corporal, sistema somatoestésico, sistema cinestésico entre otros, cuando se consideran las necesidades de rehabilitación estomatognática con el enfoque de rehabilitación neuroclusal.

  4. Capillary sample

    Science.gov (United States)

    ... several times a day using capillary blood sampling. Disadvantages to capillary blood sampling include: Only a limited ... do not constitute endorsements of those other sites. Copyright 1997-2017, A.D.A.M., Inc. Duplication ...

  5. Diseño de un Sistema Tutor Inteligente Multiagente

    Directory of Open Access Journals (Sweden)

    Elizabeth Jiménez Rey

    2006-08-01

    Full Text Available Se presentó en una publicación previa la primera etapa de una línea de investigación dentro del Proyecto de Investigación Acreditado I015 “Manufactura Integrada por Computadora en Sistemas Complejos para el Desarrollo Social, Industrial y de Tecnología”. Se ilustraron en un marco teórico los temas básicos que pretende aunar dicho trabajo: los Sistemas Tutores Inteligentes (STI y los Sistemas Multiagentes (SMA. La creación de Sistemas Inteligentes Educativos (SIE se enfoca más como una herramienta complementaria de la enseñanza y del aprendizaje que permite aumentar la calidad del aprendizaje, que como una herramienta que sustituye en sí todo un sistema clásico de enseñanza y de aprendizaje. En este trabajo se describe los aspectos esenciales que se deben considerar en el modelado de un sistema tutor inteligente utilizando la tecnología de agentes y se propone el diseño de uno en particular, especialmente su modelo de datos.

  6. Sistema Inteligente ?gil de Processo Evolutivo - SIAPE: um prot?tipo brasileiro de sistemas EPS

    OpenAIRE

    Amaral, Hiram Carlos Costa

    2016-01-01

    Paradigmas emergentes de fabrica??o t?m sido usados na tentativa de solucionar o problema da customiza??o, isto ?, a manufatura de produtos em lotes baixos e com elevados n?veis de variedades de produtos. Notadamente os Evolvable Production Systems (EPS) tem conseguido tratar o problema atrav?s do conceito de agentes mecatr?nicos e de uma invers?o do local de onde a intelig?ncia do processo produtivo est? dentro do sistema de manufatura. Entretanto, ainda h? v?rias lacunas e ba...

  7. Sistemas de vigilancia de riesgos ambientales para la salud. Sistemas de toxicovigilancia

    Directory of Open Access Journals (Sweden)

    Ana Ferrer Dufol

    2004-12-01

    Full Text Available Se presenta el estudio de la Sección de Toxicología Clínica, sobre vigilancia epidemiológica en los Servicios de Urgencias, que tienen como causa intoxicaciones por productos químicos en el periodo de 1999-2003 y dentro del convenio de Asociación Española de Toxicología (AETOX con el Ministerio de Sanidad y Consumo; trabajo presentado en el Congreso Nacional de Medio Ambiente (CONAMA en el Grupo de trabajo “Sistemas de Vigilancia de Riesgos Ambientales para la Salud”.

  8. Sistema de la libertad y sistema del tiempo: En la obra de friedrich schelling

    Directory of Open Access Journals (Sweden)

    Jorge Eduardo Fernández

    2009-06-01

    Full Text Available Las cuestiones inherentes a la relación entre tiempo y libertad alcanzan su madurez en las obras de Hegel y Schelling. En el presente artículo atenderemos de manera particular a este último, ya que el camino abierto por sus Investigaciones sobre la esencia de la libertad humana (1809 deriva con cierta claridad en los sucesivos intentos de exposición de un sistema del tiempo en las Edades del mundo (1811, 1813, 1815 y en las Lecciones de München (1827-28. Siguiendo el desarrollo de Schelling, pues, intentaremos comprender por qué en el idealismo postkantiano la búsqueda de una filosofía del espíritu como sistema de la libertad conduce a tratar el "tiempo" ya no sólo como una intuición a priori de la sensibilidad sino como una determinación inherente al absoluto, y, en tal sentido, por qué en el pensamiento de Schelling sistema de la libertad y sistema del tiempo equivalen a la exposición del absoluto.The questions inherent to the relationship between time and freedom reach their maturity in the works of Hegel and Schelling. In this article, we will attend particularly to the latter since the way opened by his "Investigations on the essence of human freedom" (1809 derives quite clearly into the successive attempts of exposition of a system of time in the "Ages of the World" (1811, 1813, 1815 and in the Lessons of München (1827-28. Following Schelling's development, then, we will try to understand why in the post-Kantian idealism the search for a philosophy of the spirit as a system of freedom leads to treat "time" not only as an a priori intuition of sensibility but as an inherent determination of the absolute, and in that sense, why in Schelling's thought system of freedom and system of time are equivalent to the exposition of the absolute.

  9. Viaje alrededor del sistema-mundo

    Directory of Open Access Journals (Sweden)

    Pablo González Casanova

    2015-08-01

    Full Text Available Al iniciar el recorrido, Wallerstein sostiene dos tesis principales: que la historia está abierta, y que vivimos una etapa en que el determinismo disminuye. En un caso enfrenta las tesis de una historia clausurada, en otro, la de un futuro sin alternativas. Ni es el ?n de la historia ni vivimos en el mejor de los mundos posibles. La investigación y la acción tienen que explorar en los terrenos macro y micro de la política, la economía, la cultura y la sociedad y descubrir cómo se abre y cierra la historia del porvenir, y como se abren los límites actuales del sistema-mundo a los valores universales respetando sus particularidades y especi?cidades. El planteamiento de Wallerstein se opone a las tesis de moda de los funcionarios-?lósofos del “establishment” conservador, dizque tecnocientí?co y objetivo. Permite comprender un mundo que está abierto a la libertad aunque no necesariamente la alcance.

  10. El sistema ESO 296-IG 11

    Science.gov (United States)

    Agüero, E. L.; Paolantonio, S.

    El objeto ESO 296-IG 11 que se presenta en forma de ``V'' y posee destacadas condensaciones a lo largo de cada una de sus dos ramas, las que son de igual extensión (~ 1'), es estudiado en base a material espectroscópico obtenido en el CASLEO. Así se establecen las principales características espectrales, las condiciones físicas y los mecanismos de excitación dominantes de las zonas más notables de su estructura, como así también la distribución de su extinción interna y la variación del grado de excitación de las mismas. Del análisis de las velocidades radiales se determina que se trata de dos galaxias de tipo disco que se están interpenetrando y que conforman un sistema triple junto con una galaxia de contorno elíptico y tamaño considerablemente menor (0.2') que se encuentra a ~ 1.3' del punto de intersección de las dos primeras, ubicada sobre la dirección que contiene a una de éstas y hacia la que se extienden unas débiles y largas prolongaciones de la otra.

  11. Perspectivas de los sistemas de pago

    Directory of Open Access Journals (Sweden)

    Daniel Heymann

    2016-04-01

    Full Text Available ResumenLos agentes, instrumentos y mecanismos que intervienen en la realización de transacciones cotidianas han ido variando considerablemente a lo largo del tiempo, de acuerdo a la evolución de las prácticas, tecnologías e instituciones que determinan costumbres y mecanismos de pago. La organización de los esquemas de intercambio, y de los sistemas financieros en general se ha convertido en tema saliente de discusión contemporánea. Estas notas presentan un breve análisis de la cuestión, centrado sobre los procedimientos para procesar pagos.Código JEL: E42. AbstractThe agents, instruments and mechanisms involved in everyday transactions have varied considerably over time, according to the evolution of practices, technologies and institutions that determine customs and payment mechanisms. The organization of exchange schemes, and financial systems in general, has become salient topic of contemporary discussion. This paper presents a brief analysis of the matter, focused on procedures to process payments. Key words: Monetary Systems,Payment Systems, Currency.Code JEL: E42

  12. Sistema integral para viviendas unifamiliares -SIVIM-

    Directory of Open Access Journals (Sweden)

    Drágula, Josef

    1984-07-01

    Full Text Available The Integral System for Multi-family Housing —SIVIM— is a proposition combining a structural solution and a functional one. In the first, techniques developed in civil construction for reinforced concrete technology are incorporated in the production of buildings. The second one proposes a spatial solution appropriate to the users’ requirements. Thus, with this proposition, the aims of constructing mass, low-cost housing are maintained in countries with tropical climatesEl Sistema Integral para Viviendas Multifamiliares —SIVIM— es una proposición que combina una solución estructural y una solución funcional. En la primera, se incorporan técnicas desarrolladas en la construcción civil, para la tecnología del hormigón armado, a la producción de edificaciones. La segunda, propone una solución espacial apropiada a los requerimientos de los usuarios. Se mantiene así con esta proposición, las metas de la construcción masiva y del bajo costo de la vivienda en países de clima tropical

  13. O sistema social da saúde: conceito, limites e possibilidades

    Directory of Open Access Journals (Sweden)

    Sandra Regina Martini Vial

    2014-06-01

    Full Text Available Discutem-se as possibilidades de definir o sistema da saúde como um sistema social, diferenciado funcionalmente, a partir da ótica da Teoria dos Sistemas Sociais, utilizando os pressupostos gerais da Teoria e a estrutura apresentada por Niklas Luhmann sobre o sistema médico. Apresentam-se alguns “desassossegos” provocados pela Teoria; as possíveis relações entre o sistema da saúde e o que Luhmann chamou de sistema médico e como esse sistema, atualmente, pode ser considerado sistema da saúde; e, por fim, a nossa concepção do sistema da saúde na atualidade.

  14. Language sampling

    DEFF Research Database (Denmark)

    Rijkhoff, Jan; Bakker, Dik

    1998-01-01

    This article has two aims: [1] to present a revised version of the sampling method that was originally proposed in 1993 by Rijkhoff, Bakker, Hengeveld and Kahrel, and [2] to discuss a number of other approaches to language sampling in the light of our own method. We will also demonstrate how our ...... sampling method is used with different genetic classifications (Voegelin & Voegelin 1977, Ruhlen 1987, Grimes ed. 1997) and argue that —on the whole— our sampling technique compares favourably with other methods, especially in the case of exploratory research.......This article has two aims: [1] to present a revised version of the sampling method that was originally proposed in 1993 by Rijkhoff, Bakker, Hengeveld and Kahrel, and [2] to discuss a number of other approaches to language sampling in the light of our own method. We will also demonstrate how our...

  15. Language sampling

    DEFF Research Database (Denmark)

    Rijkhoff, Jan; Bakker, Dik

    1998-01-01

    This article has two aims: [1] to present a revised version of the sampling method that was originally proposed in 1993 by Rijkhoff, Bakker, Hengeveld and Kahrel, and [2] to discuss a number of other approaches to language sampling in the light of our own method. We will also demonstrate how our...... sampling method is used with different genetic classifications (Voegelin & Voegelin 1977, Ruhlen 1987, Grimes ed. 1997) and argue that —on the whole— our sampling technique compares favourably with other methods, especially in the case of exploratory research....

  16. SISTEMAS INMUNES ALTERNATIVOS Alternative Immune Systems

    Directory of Open Access Journals (Sweden)

    LUIS F. CADAVID

    Full Text Available El sistema inmune en animales es una red compleja de moléculas, células y tejidos que de manera conjunta mantienen la integridad fisiológica y genética de los organismos. Convencionalmente se ha considerado la existencia de dos clases de inmunidad, la innata y la adaptativa. La primera es ancestral, con variabilidad limitada y baja discriminación, mientras que la segunda es altamente variable, específica y restringida a vertebra-dos mandibulados. La inmunidad adaptativa se basa en receptores de antígeno que se rearreglan somáticamente para generar una diversidad casi ilimitada de moléculas. Este mecanismo de recombinación somática muy probablemente emergió como consecuencia de un evento de transferencia horizontal de transposones y transposasas bacterianas en el ancestro de los vertebrados mandibulados. El reciente descubrimiento en vertebrados no mandibulados e invertebrados de mecanismos alternativos de inmunidad adaptativa, sugiere que en el transcurso de la evolución distintos grupos animales han encontrado soluciones alternativas al problema del reconocimiento inmunológico.The immune system in animals is a complex network of molecules, cells and tissues that coordinately maintain the physiological and genetic integrity of the organism. Traditionally, two classes of immunity have been considered, the innate immunity and the adaptive immunity. The former is ancestral, with limited variability and low discrimination. The latter is highly variable, specific and limited to jawed vertebrates. Adaptive immunity is based on antigen receptors that rearrange somatically to generate a nearly unlimited diversity of molecules. Likely, this mechanism of somatic recombination arose as a consequence of horizontal transfer of transposons and transposases from bacterial genomes in the ancestor of jawed vertebrates. The recent discovery in jawless vertebrates and invertebrates of alternative adaptive immune mechanisms, suggests that during

  17. Sampling Development

    Science.gov (United States)

    Adolph, Karen E.; Robinson, Scott R.

    2011-01-01

    Research in developmental psychology requires sampling at different time points. Accurate depictions of developmental change provide a foundation for further empirical studies and theories about developmental mechanisms. However, overreliance on widely spaced sampling intervals in cross-sectional and longitudinal designs threatens the validity of…

  18. SISTEMA DE CONTROL INTELIGENTE PARA UN GRUPO DE ELEVADORES

    Directory of Open Access Journals (Sweden)

    Andrés Enrique Rosso Mateus

    2008-01-01

    Full Text Available En este artículo se trata el problema del tráfico vertical en edificios de gran altura y se describe el análisis, diseño y evaluación de un sistema de control para un grupo elevadores que busca mejorar el desempeño respecto a un sistema de control tradicional. El controlador propuesto busca asignar de una forma inteligente las llamadas que se generan a los ascensores que hacen parte del grupo, el desempeño del sistema se traduce en una reducción de los tiempos de servicio y de la energía que invierte el sistema. El controlador propuesto está basado en lógica difusa y las reglas de inferencia expresan el conocimiento de un experto orientado hacia la obtención de los objetivos mencionados. El controlador inteligente se evalúa en un simulador gráfico desarrollado para este fin, este simulador permite ingresar parámetros de configuración para que se adapte y represente una edificación real. Se corrieron dos simulaciones, una usando un controlador convencional y otra usando el controlador inteligente, esto con el fin de comparar su desempeño y cuantificar valores como tiempo de esperar de los usuarios y energía consumida por el sistema.

  19. Propuesta de evaluación de sistemas constructivos

    Directory of Open Access Journals (Sweden)

    Monjo Garrió, Juan

    1986-11-01

    Full Text Available The present work developes a method to evaluate in a functional, technical and economical way a building system in a specific situation. In orther to do that, and after a definition of a building system, it analizes the functional, technological and economical requirements of any system and proposes several graphs where the answers of the systems to those requirements are pointed up, in a way that they can be measured and evaluated. Finally, a first application of these graphs to two different systems in use is done, in order to know better its use.El presente trabajo desarrolla un método para evaluar funcional, técnica y económicamente un sistema constructivo en una determinada situación geográfica y económica. Para ello, y después de establecer una definición de sistema constructivo analiza, primeramente, cuáles son las exigencias funcionales, tecnológicas y económicas que se pueden plantear a cualquier sistema, y propone unos cuadros y gráficos donde se van recogiendo las respuestas del sistema a estas exigencias, de modo que se puedan medir y evaluar en cualquier caso. Por último, se lleva a cabo una primera aplicación de esos cuadros a dos sistemas distintos, utilizados en la actualidad, para conocer mejor su uso.

  20. Gobierno y administración de sistemas de riego

    Directory of Open Access Journals (Sweden)

    Jacinta Palerm-Viqueira

    2005-01-01

    Full Text Available La propuesta es diferenciar gobierno y administración en los sistemas de riego, argumentando que el análisis que permite la caracterización de esta última no se puede realizar observando únicamente el locus de autoridad. Desde la perspectiva de la administración, hay casos de autogobierno en que los regantes mismos realizan todas las tareas con base en sistemas de conocimiento local, otros en que toda la administración se encuentra a cargo de personal contratado. Hay casos de administración burocrática y tecnocrática en sistemas con distinto locus de autoridad (Estado/regantes. Además, se propone que mientras el autogobierno de sistemas de riego no parece tener límites de tamaño, la administración sin burocracia ni persona l especializado parece estar acotada a sistemas de riego de una extensión determinada. No obstante, se argumenta que el gobierno influye sobre el carácter de la administración, dado que su descentralización disminuye o evita que sea burocrática/tecnocrática.

  1. Aplicación de la teoría general de sistemas al análisis de los sistemas informáticos

    OpenAIRE

    Zubenko, Yuriy; Cataldi, Zulma; Lage, Fernando Javier

    2001-01-01

    Utilizando la metodología del análisis de sistemas y la teoría general de sistemas se pueden resolver tres tareas pertinentes a los sistemas informáticos en estadíos diferentes: el análisis de sistema de computación (en forma estática), el análisis de los sistemas de programación (en estática y dinámica) y el pronóstico de la evolución de los sistemas de computación (evolución cíclica). Para ello, se usa el esquema o modelo general del sistema informático para representar cada tarea del siste...

  2. Aplicación de la teoría general de sistemas al análisis de los sistemas informáticos

    OpenAIRE

    Zubenko, Yuriy; Cataldi, Zulma; Lage, Fernando Javier

    2001-01-01

    Utilizando la metodología del análisis de sistemas y la teoría general de sistemas se pueden resolver tres tareas pertinentes a los sistemas informáticos en estadíos diferentes: el análisis de sistema de computación (en forma estática), el análisis de los sistemas de programación (en estática y dinámica) y el pronóstico de la evolución de los sistemas de computación (evolución cíclica). Para ello, se usa el esquema o modelo general del sistema informático para representar cada tarea del siste...

  3. Sistemas de medición utilizados en Costa Rica para calcular volumen de madera en troza y aserrada

    OpenAIRE

    2012-01-01

    Se presenta una ficha con dos sistemas de medición para calcular volumen de madera en troza y aserrada: Sistema mecate costarricense y Sistema internacional de unidades, así como algunos factores de conversión.

  4. Effect of the extract of persimmon (Diospyros kaki L. cv. ‘Rama Forte’and rosemary oily extract (Rosmarinus officinalis L. on the sensory characteristics and color stability of frozen beef burgersEfeito de extratos de caqui (Diospyros kaki L. cultivar Rama Forte e do extrato oleoso de alecrim (Rosmarinus officinalis L. nas características sensoriais e na estabilidade da cor de hambúrguer de carne bovina congelado

    Directory of Open Access Journals (Sweden)

    Leadir Lucy Martins Fries

    2012-06-01

    Full Text Available This study aimed to evaluate the effect of the extract of persimmon cv. ‘Rama Forte’ and rosemary oily extract on the sensory characteristics and color stability of frozen beef burgers. The crude hydroethanolic extract was prepared and subjected to fractionation resulting in the hexane, chloroform and ethyl acetate fractions as well as residual fraction. For the preparation of the burger samples a basic formulation was prepared and divided into parts: control, standard formulation ( 0.1% of sodium erythorbate, treatment 1 (0.5% of hydroethanolic crude extract, treatment 2 (0.7% of hydroethanolic crude extract, treatment 3 (0.5% of the residual fraction, treatment 4 (0.7% of the residual fraction , treatment 5 ( 0.5% of ethyl acetate fraction, Treatment 6 (0.7% of ethyl acetate fraction and treatment 7 (0.10% of oily extract of rosemary. The beef burger samples were stored at-25° C for 14 months and subjected to sensory analysis (color, aroma, flavor, and texture at the beginning of the experiment and the measurement of color (parameters L a*, b* and h* every two months. The addition of the extracts did not promote changes in the sensory attributes of the beef burgers at time zero of storage. A tendency to decrease a* values and increase of the h* values of the samples of frozen beef burgers occurred over the period of storage. Samples added with ethyl acetate fraction (0.5 and 0.7% and the oily extract of rosemary showed higher a* values than the other samples throughout the storage period and lower h* values than the standard sample at the end of the period evaluated. This indicates that the addition of ethyl acetate fraction and rosemary extract contributed to the retention and stability of the red color of the samples of beef burgers during the storage of the frozen product.O objetivo deste estudo foi avaliar o efeito de extratos de caqui cv. Rama Forte e do extrato oleoso de alecrim sobre as características sensoriais e a estabilidade

  5. Macrofauna invertebrada do solo sob diferentes sistemas de produção em Latossolo da Região do Cerrado Soil invertebrate macrofauna under different production systems in a Hapludox in the Cerrado Region

    Directory of Open Access Journals (Sweden)

    Rogério Ferreira da Silva

    2006-04-01

    Full Text Available O objetivo deste trabalho foi quantificar a densidade e diversidade de grupos da comunidade de macrofauna invertebrada do solo sob diferentes sistemas de produção, bem como analisar a similaridade entre os sistemas avaliados. O trabalho foi conduzido no Município de Dourados, MS, em Latossolo Vermelho distroférrico típico, sob os seguintes sistemas: sistema convencional (SC, sistema plantio direto (SPD, sistema integração lavoura/pecuária (SILP, pastagem contínua (PC e vegetação nativa. As amostragens foram realizadas em três safras de verão e de inverno. Os valores de densidade total da comunidade de macrofauna invertebrada de solo, nos sistemas SPD, SILP e PC, foram similares, no entanto, o SPD apresentou a maior diversidade de grupos. Na safra de verão, observou-se similaridade entre os sistemas SPD e SILP e entre o SC e PC; e na safra de inverno, a similaridade foi entre os sistemas SPD, SILP e PC.The objective of this work was to quantify the density and diversity of soil invertebrate macrofauna community, in different production systems, and also to evaluate the similarity among them. The study was carried out in the Municipality of Dourados, MS, Brazil, in a Typic Hapludox under the following systems: conventional system (CS, no-tillage system (NTS, crop/livestock integration system (CLIS, continuous pasture (CP and natural system. Samples were collected during summer and winter cropping seasons. Total density and diversity of the soil invertebrate macrofauna community in the NTS, CLIS, and CP systems were similar. However, NTS showed the highest diversity. In summer, similarity was observed between NTS and CLIS, and between CS and CP, with regard to the soil invertebrate macrofauna community. In winter, similarity was among NTS, CLIS and CP.

  6. Métodos de control en sistemas domóticos: últimas tendencias en sistemas distribuidos

    Directory of Open Access Journals (Sweden)

    Moreno Navarro, I.

    1999-02-01

    Full Text Available Control systems lie amongst the most difficult issues to be tackled when it comes to designing home automation systems. Two classical tendencies may be considered to solve this problem. The first one consists of a centralised control system, whereas the second option advocates for a distributed network, where piece would take up certain responsibilities in the control of the whole system. In this paper we analyse some of the latest developments as regards programming distributed networks, focusing on home automation, specially Java and the latest Jini environments have dramatically improved the potential of such kind of distributed systems, thanks to them, it is possible to build a heterogeneous network including devices from different brands which work in collaborative systems, thus avoiding complex configurations.

    Uno de los aspectos más delicados a la hora de diseñar un sistema domótico es el que se refiere al modelo de control que deseamos establecer. Podemos considerar dos tendencias clásicas: la que trata de establecer un control centralizado del sistema y la que propone un control mucho más descentralizado, donde cada aparato seria responsable de cierta parte de la gestión del control ejercido sobre toda la red. En este articulo tratamos de profundizar en las últimas novedades aparecidas en el campo de la programación de los controladores asociados a una red domótica, en particular Java y el más reciente Jini, que aportan una serie de soluciones que facilitan la compatibilidad entre dispositivos de distintos fabricantes y apuestan claramente por una arquitectura de tipo distribuido, dotando a las redes domóticas de una flexibilidad y un potencial de crecimiento inusitados.

  7. El sistema de partidos de cataluña

    Directory of Open Access Journals (Sweden)

    Gema Sánchez Medero

    2011-07-01

    Full Text Available : El artículo realiza una radiografía del sistema de partidos políticos de Cataluña, fijando las características sobre el que gira el mismo. Inicialmente presenta un análisis de la evolución del sistema de partidos desde las primeras elecciones autonómicas hasta las últimas celebradas en noviembre de 2010. En una segunda parte estudia el peso que ha tenido cada una de las fuerzas catalanes en cada uno de los comicios que se han celebrado desde 1980 hasta 2010, fijando una serie de variables presentes en el sistema de partidos: predomino del eje centro-derecha y de los partidos nacionalistas, el voto dual y los niveles de abstención.

  8. Sistema de adquisición y procesamiento de audio

    OpenAIRE

    Pérez Segurado, Rubén

    2015-01-01

    El objetivo de este proyecto es el diseño y la implementación de una plataforma para un sistema de procesamiento de audio. El sistema recibirá una señal de audio analógica desde una fuente de audio, permitirá realizar un tratamiento digital de dicha señal y generará una señal procesada que se enviará a unos altavoces externos. Para la realización del sistema de procesamiento se empleará: - Un dispositivo FPGA de Lattice, modelo MachX02-7000-HE, en la cual estarán todas la...

  9. Interface: Sistema orientado à visualização

    Directory of Open Access Journals (Sweden)

    Alexandre Braga

    2015-06-01

    Full Text Available A criação de ambientes interativos para multiplataformas implica necessariamente o design de interface. Este artigo está dedicado às questões relativas à interface humano-computador cujas funções são definidas como sistema. Este apresenta atributos específicos que, neste caso, são tratados no contexto dos sistemas humano-máquina. Para que ambos os elementos possam interagir, é preciso haver um objetivo, ou seja, uma tarefa comum. Em função disso, as interfaces de usuário são observadas pela perspectiva do sistema humano-tarefa-computador, cujas interações são fundamentais para a compreensão da interface computacional.  

  10. ALFABETIZAÇÃO E O SISTEMA DE ESCRITA

    Directory of Open Access Journals (Sweden)

    Osvaldo Freitas de Jesus

    2008-01-01

    Full Text Available Este texto argumenta que el sistema simbólico-alfabético no es solo una representación del habla, más especialmente un sistema alternativo de representación de los conceptos. Un lector fluente no necesita transformar grafemas en fonemas para comprender un texto escrito. Durante la alfabetización todo lector elabora nexos funcionales entre los fonemas y los grafemas. Grafemas son unidades distintivas, visuales y escritas, que permiten establecer la diferencia de significación entre pares de palabras escritas (por ejemplo, pasto = casto. El sistema de escritura funciona también como una extensión de la memoria humana.

  11. arroz rojo (Oryza sativa L. en dos sistemas de labranza

    Directory of Open Access Journals (Sweden)

    Steven Brenes Prendas

    2006-01-01

    Full Text Available A lo largo de cuatro ciclos de cultivo de arroz anegado, entre los años 2003 y 2004, en la Hacienda El Pelón de la Bajura, Liberia, Guanacaste, Costa Rica, se determinó la distribución espacial de las poblaciones de arroz rojo en los sistemas de Siembra Directa sobre Rastrojos (SDR y en Labranza Mecanizada Convencional (LMC. Mediante levantamientos de malezas ubicados en puntos fijos a nivel de campo y con ayuda del programa Surfer, se logró construir mapas georeferenciales de dichas poblaciones. El sistema SDR logró disminuir el ritmo de crecimiento de las poblaciones, facilitando su manejo, por lo contrario el sistema LMC, favoreció: la distribución, el aumento y la densidad de las poblaciones de arroz rojo en el campo. Los mapas de georeferencia facilitarían la toma de decisiones en el manejo integrado del arroz rojo

  12. La familia como sistema social: Conyugalidad y parentalidad

    Directory of Open Access Journals (Sweden)

    Hugo Cadenas

    2015-01-01

    Full Text Available El presente artículo aborda el concepto de familia en el marco de la teoría de sistemas sociales. A partir de un análisis crítico de las reflexiones de algunos autores que siguen esta tradició n teórica, se propone un concepto de familia moderna como un sistema funcionalmente diferenciado. A partir de esta decisión teórica, se define la comunicación íntima como característica de la familia y a la distinción entre parientes como código basal del sistema.

  13. Modelado de sistemas complejos mediante simulación basada en agentes y mediante dinámica de sistemas

    Directory of Open Access Journals (Sweden)

    LUIS R. IZQUIERDO

    2008-01-01

    Full Text Available Este trabajo compara dos técnicas de modelado de sistemas complejos: la simulación basada en agentes y la dinámica de sistemas. Esta comparación se lleva a cabo dentro del marco general del proceso de modelado científico. Los autores concluyen que la principal diferencia entre las dos metodologías se encuentra en el proceso de abstracción que cada una de ellas realiza para construir el modelo formal a partir del sistema complejo observado. Esta diferencia inicial se extiende a las restantes etapas del proceso de modelado científico. Finalmente, se indican los principales factores y las propiedades generales de un sistema complejo que hacen que una u otra técnica sea más relevante, aunque los autores destacan que, en la mayoría de los casos, modelizar un mismo sistema mediante las dos técnicas es la solución idónea.

  14. Debido proceso, sistemas y reforma del proceso penal

    OpenAIRE

    Armenta Deu,Teresa

    2015-01-01

    Este artículo se propone examinar los modelos de procesos penales de los movimientos de reforma que se establecieron en las últimas décadas del siglo XX, en los países iberoamericanos. Para ello, primero se enfatiza las características históricas de cada sistema, poniendo de relieve la importancia de no confundir el acusatorio con el adversarial, rechazando la coincidencia entre los sistemas actuales y mixto inquisitivo histórico. Apoya la importancia de la igualdad de armas y e del contradic...

  15. Competitividad y sistemas de dirección

    OpenAIRE

    García Echevarría, Santiago

    2007-01-01

    Este texto corresponde a la Clausura del Programa de Desarrollo Directivo compartido entre la Universidad de Alcalá y Siemens Los sistemas de dirección de una empresa o de una institución, cualesquiera que sean sus objetivos finales, contribuyen de forma precisa a los procesos de dirección y de disposición de recursos escasos. Pero esto se acentúa cuando estas empresas se encuentran en situación de competencia. Aquí los sistemas de dirección implican el desarrollo de los potenciales humano...

  16. Análisis bayesiano de sistemas de colas

    OpenAIRE

    Ausín, Concepción

    2011-01-01

    En esta tesis, se proponen procedimientos Bayesianos para la inferencia, predicción y diseño de diferentes sistemas de colas que incluyen modelos con distribuciones generales para el tiempo entre las llegadas y/o el tiempo de servicio, con uno o varios servidores y con capacidad finita e infinita. Con las observaciones tomadas del proceso de llegadas y de servicio en el sistema, en primer lugar, se desarrollan métodos de estimación Bayesiana de densidades que permiten aproximar las distribuci...

  17. Sistema integral de gestión de inmuebles online

    OpenAIRE

    Díaz Gil, Alberto

    2010-01-01

    Se requiere un sistema para la gestión de propiedades de una inmobiliaria con dos oficinas. Este sistema incluye una plataforma web y la gestión de una pantalla situada en el escaparate de una de las oficinas. La inmobiliaria disponía de un software que les permitía realizar todas las gestiones inmobiliarias, creado y mantenido por la empresa ASPgems, que es el que ha sido reemplazado por el proyecto objeto de esta memoria. La inmobiliaria necesita que exista: 0. Una web ...

  18. Linfoma do sistema nervoso central: ensaio iconográfico

    Directory of Open Access Journals (Sweden)

    Fabiano Reis

    2013-04-01

    Full Text Available Ilustramos este ensaio iconográfico de linfoma do sistema nervoso central com imagens de ressonância magnética obtidas em nosso serviço nos últimos 13 anos e discutimos algumas das principais características radiológicas deste tipo de linfoma, primário e secundário. O linfoma sistema nervoso central é um tumor relativamente infrequente, mas alguns achados na ressonância magnética podem sugerir este diagnóstico.

  19. Proyecto ICARUS. Sistema de comunicación GPRS.

    OpenAIRE

    Medina Medina, Esunly; Revuelto Lorda, Natalia

    2006-01-01

    El presente proyecto desarrolla el sistema de comunicación de un UAV (Unmanned Aerial Vehicle). Los UAVs son aviones no tripulados con aplicaciones tanto en el ámbito militar como civil. El objetivo que pretendemos alcanzar es el desarrollo de un sistema para la transferencia de datos desde el UAV a través de la red GPRS, el cual se situará dentro del avión junto con los dispositivos de control del mismo. Estudiamos la infraestructura de la red GPRS y los diferentes protocol...

  20. Sistemas de almacenamiento de energía

    OpenAIRE

    2016-01-01

    El objetivo de este Trabajo de Fin de Grado es tener una idea general sobre los diferentes tipos de sistemas de almacenamiento disponibles en la actualidad y realizar un estudio sobre los mismos, acerca de su funcionamiento, costes, aplicaciones y viabilidad y líneas futuras. Además se analizará, de manera general, la problemática actual de la energía, las SmartGrids y la relación existente con los sistemas de almacenamiento de energía. Departamento de Tecnología Electrónica Grado en In...

  1. A Biotecnologia e o sistema internacional de patentes

    OpenAIRE

    2011-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Jurídicas. Programa de Pós-Graduação em Direito O Sistema Internacional de Patentes, tal como foi historicamente delineado para promover o desenvolvimento científico e tecnológico expõe, nos âmbitos jurídicos e políticos, as fragilidades de um sistema na garantia do direito à saúde e acesso, sobretudo nos países em desenvolvimento. A partir da análise do Acordo sobre Aspectos de Direitos de Propriedade Inte...

  2. Sistema de salud de Brasil The health system of Brazil

    OpenAIRE

    Víctor Becerril Montekio; Guadalupe Medina; Rosana Aquino

    2011-01-01

    En este trabajo se describe el sistema de salud de Brasil, que está compuesto por un sector público que cubre alrededor de 75% de la población y un creciente sector privado que ofrece atención a la salud al restante 25% de los brasileños. El sector público está constituido por el Sistema Único de Salud (SUS) y su financiamiento proviene de impuestos generales y contribuciones sociales recaudadas por los tres niveles de gobierno (federal, estatal y municipal). El SUS presta servicios de manera...

  3. Los sistemas just-in-time/Kanban, un paradigma productivo

    OpenAIRE

    Huberto Juárez Núñez

    2002-01-01

    Los sistemas just-in-time/Kanban surgen en el contexto de la reconstrucción de la economíajaponesa hacia mediados del siglo XX. Fueron las empresas automotrices (especialmente Toyota)las que lograron hacer un análisis crítico de las debilidades y fortalezas del sistema fordista, y enese camino encontraron rutas alternativas que mostraron su importancia cuando en el proceso desu internacionalización dieron respuesta a problemas sistémicos del capitalismo. Su impacto en lasestructuras productiv...

  4. Sposobnost opstanka informacionih sistema / Survivability of information systems

    OpenAIRE

    Boško Rodić; Dejan Vuletić

    2005-01-01

    U radu je opisan značaj i trend razvoja informacionih sistema u savremenom društvu, a definisani su i drugi značajni pojmovi radi boljeg razumevanja problema. Prikazana su i četiri aspekta rešenja sposobnosti opstanka informacionih sistema koje predlaže Computer Emergency Response Team (CERT). / The article deals with importance and trend of information systems in modern society. In the article are defined, beside survivability, other relevant ideas necessary for better understanding of the p...

  5. Sposobnost opstanka informacionih sistema / Survivability of information systems

    Directory of Open Access Journals (Sweden)

    Boško Rodić

    2005-03-01

    Full Text Available U radu je opisan značaj i trend razvoja informacionih sistema u savremenom društvu, a definisani su i drugi značajni pojmovi radi boljeg razumevanja problema. Prikazana su i četiri aspekta rešenja sposobnosti opstanka informacionih sistema koje predlaže Computer Emergency Response Team (CERT. / The article deals with importance and trend of information systems in modern society. In the article are defined, beside survivability, other relevant ideas necessary for better understanding of the problems. Also, in the article are illustrated four aspects of information system survivability solution by Computer Emergency Response Team (CERT.

  6. Funciones del Fiscal en el Sistema Procesal Penal Acusatorio Ecuatoriano

    OpenAIRE

    Guillén, Oscar Medardo

    2006-01-01

    El art.219 de la Constitución Política vigente, define el nuevo marco legal, para el ejercicio de la acción penal de instancia pública, del Ministerio Público, en concordancia con el Nuevo Código de Procedimiento Penal y la Ley Orgánica del Ministerio Público, instrumentos jurídicos que han permitido el cambio del sistema conocido como inquisitivo , caracterizado por la concentración de funciones en el juez, para dar paso al sistema acusatorio oral que se ha dicho es mas humano, democrático y...

  7. Desarrollo histórico del sistema sanitario de Ecuador

    OpenAIRE

    2015-01-01

    En este trabajo se describen las condiciones de salud de Ecuador y con mayor detalle, las características del sistema ecuatoriano de salud, incluyendo su estructura y cobertura, programas de salud, fuentes de financiamiento, los recursos físicos, materiales y humanos de los que dispone, las tareas de rectoría que desarrolla el Ministerio de Salud Pública. La República de Ecuador no escapó de los efectos de las sucesivas crisis económicas, y su sistema de salud estuvo marcado por más de 15 ...

  8. LÍNEA DE BASE DEL SISTEMA PENAL ECUATORIANO

    OpenAIRE

    2011-01-01

    RESUMO En el año 2000, el Ecuador cambió su sistema procesal penal de tipo inquisitivo por uno de corte acusatorio. Para determinar el funcionamiento del mismo se debía levantar una línea de base recogiendo en una base de datos algunos indicadores del proceso penal. A partir de este conjunto de datos y variables iniciales, se hizo factible la elaboración de un sistema informático procesal penal ecuatoriano (SIPPE) que permite elaborar un análisis de componentes principales. En nuestro caso, l...

  9. La crisis del Sistema partidario peruano (1985-1995)

    OpenAIRE

    Crabtree, John

    1994-01-01

    En este ensayo, el autor examina el desarrollo político peruano desde fines de los años ochenta. El énfasis se da desde la elección de Alberto Fujimori como Presidente de la República. Asimismo, analiza la crisis del sistema partidario peruano (su existencia y el rol de los partidos políticos) así como los más graves problemas en los últimos años: hiperinflación y terrorismo. Finalmente, plantea la discusión de las condiciones necesarias para el resurgimiento del sistema partidario en el Perú...

  10. El problema de estabilidad de los sistemas Hamiltonianos multidimensionales

    Science.gov (United States)

    Cincotta, P. M.

    Se revisarán los aspectos básicos del problema de estabilidad de sistemans Hamiltonianos N-dimensionales, haciendo especial énfasis en los posibles mecanismos que dan lugar a la aparición de ``caos": overlap de resonancias, difusión de Arnol'd y otros procesos difusivos alternativos. Se mencionarán los aspectos aún no resueltos sobre la estabilidad de los sistemas con N > 2. Finalmente, se discutirá cuáles de estos mecanismos podrían tener alguna relevancia en la dinámica de sistemas estelares y planetarios.

  11. Sistemas de cúmulos globulares extragalácticos

    Science.gov (United States)

    Forte, J. C.

    Se describen las características de los sistemas de cúmulos globulares asociados a galaxias elípticas en una variedad de medios y, en particular, aquellas vinculadas con la distribución espacial, frecuencia específica y composición química. Esta discusión se hace dentro de un conjunto de esquemas orientados a explicar las primeras fases de la formación de las galaxias dominantes en cúmulos y del rol de los sistemas de cúmulos globulares en esos procesos.

  12. La guerra de los sistemas operativos V1.0

    OpenAIRE

    López-Get, Anthony

    2010-01-01

    Este artículo analiza tres tipos diferentes de sistemas operativos para computadoras —Windows®, Mac OS® y las distribuciones GNU/Linux®— como objetos culturales, desde la ideología, el mito y la cultura material. Se estudia como estos programas de ordenador se erigen como símbolos representativos de diferentes grupos culturales, al reproducir hábitos de consumo, diferenciación social, y discursos hegemónicos, sub y contraculturales, todos dentro del ámbito de los sistemas de producción actual...

  13. LA GUERRA DE LOS SISTEMAS OPERATIVOS V1.0

    OpenAIRE

    López Get, Anthony

    2013-01-01

    Este artículo analiza tres tipos diferentes de sistemas operativos para computadoras—Windows®, Mac OS® y las distribuciones GNU/Linux®—como objetos culturales, desde la ideología, el mito y la cultura material. Se estudia como estos programas de ordenador se erigen como símbolos representativos de diferentes grupos culturales, al reproducir hábitos de consumo, diferenciación social, y discursos hegemónicos, sub y contraculturales, todos dentro del ámbito de los sistemas de producción actuales...

  14. Ambientalismo y desarrollo sustentable: tramas del sistema capitalista

    Directory of Open Access Journals (Sweden)

    Raúl Pérez Verdi

    2011-07-01

    Full Text Available El presente trabajo tiene un doble propósito: analizar la invención del Desarrollo Sustentable y su trayecto como discurso dominante en América Latina y el Caribe; por un lado; y por fijar las formas discursivas que configura el sistema capitalista en la retórica del desarrollo. Se describe cómo operan dichos discursos en la fabricación de sujetos y prácticas sociales. El texto analiza los mecanismos que aseguran lo que denomino la forma ideológica del sistema capitalista en el discurso de la sustentabilidad.

  15. Debido proceso, sistemas y reforma del proceso penal

    Directory of Open Access Journals (Sweden)

    Teresa Armenta Deu

    2015-03-01

    Full Text Available Este artículo se propone examinar los modelos de procesos penales de los movimientos de reforma que se establecieron en las últimas décadas del siglo XX, en los países iberoamericanos. Para ello, primero se enfatiza las características históricas de cada sistema, poniendo de relieve la importancia de no confundir el acusatorio con el adversarial, rechazando la coincidencia entre los sistemas actuales y mixto inquisitivo histórico. Apoya la importancia de la igualdad de armas y e del contradictoria en la búsqueda de un equilibrio entre los modelos de procedimiento.

  16. Sistemas Correctores de Campo Para EL Telescopio Cassegrain IAC80

    Science.gov (United States)

    Galan, M. J.; Cobos, F. J.

    1987-05-01

    El proyecto de instrumentación de mayor importancia que ha tenido el Instituto de Astrofisica de Canarias en los últimos afios ha sido el diseflo y construcción del te1escopio IAC8O. Este requería del esfuerzo con junto en mec´nica, óptica y electrónica, lo que facilitó la estructuración y el crecimiento de los respectivos grupos de trabajo, que posteriormente se integraron en departamentos En su origen (1977), el telescopio IAC80 fue concebido como un sistema clásico tipo Cassegrain, con una razón focal F/i 1.3 para el sistema Casse grain y una razón focal F/20 para el sistema Coudé. Posteriormente, aunque se mantuvo la filosofia de que el sistema básico fuera el F/11.3, se consideró conveniente el diseño de secundarios para razones focales F/16 y F/32, y se eliminó el de F/20. Sin embargo, dada la importancia relativa que un foco estrictamente fotográfico tiene en un telescopio moderno, diseñado básicamente para fotometría fotoeléctrica y con un campo util mínimamente de 40 minutos de arco, se decídió Ilevar a cabo el diseño de un secundario F/8 con un sistema corrector de campo, pero que estuviera formado únicamente por lentes con superficies esféricas para que asl su construcción fuera posible en España ó en México. La creciente utilización de detectores bidimensionales para fines de investigación astron6mica y la viabilidad de que en un futuro cercano éstos tengan un área sensible cada vez mayor, hicieron atractiva la idea de tener diseñado un sistema corrector de campo para el foco primario (F/3), con un campo útil mínimo de un grado, y también con la limitante de que sus componentes tuvieron sólamente supérficies esféricas. Ambos diseños de los sis-temas correctores de campo se llevaron a cabo, en gran medida, como parte de un proyecto de colaboración e intercambio en el área de diseño y evaluación de sistemas ópticos.

  17. NoSql en sistemas distribuidos sobre Cluster Hadoop

    OpenAIRE

    2016-01-01

    Con el gran avance de los sistemas distribuidos en la web y las tecnologías informáticas distribuidas como Cluster y Cloud, el software como servicio (SaaS), los servicios en el Cloud y los constantes requerimientos de procesamiento y análisis a gran escala de enormes cantidades de datos, los sistemas tradicionales de base de datos son insuficientes. Las Bases de Datos NoSQL llenan una importante carencia de las bases de datos relacionales en cuanto a la capacidad que estas tienen en escalabi...

  18. Sistema penal acusatorio en Veracruz/Adversarial criminal system in Veracruz

    National Research Council Canada - National Science Library

    Jorge Alberto Pérez Tolentino (México)

    2014-01-01

    .... Es preciso sistematizar, describir y analizar la estructura del sistema penal acusatorio, a efecto de estar en condiciones de evaluar y, en su caso, proponer las mejoras al sistema en cuestión...

  19. Estado del arte para el sistema de pago electrónico para el sistema integrado de transporte

    OpenAIRE

    2014-01-01

    El presente documento pretende mostrar el estado del arte de los sistemas inteligentes de pago en transporte público. Las plataformas informáticas (TICs) utilizadas en los sistemas de transporte más avanzados no solo sirven para fundamentar el pago sino que van más allá enriqueciendo el conocimiento del sistema y aumentando así el potencial de eficiencia en la gestión estratégica y táctica, y de paso permiten ajustar las políticas de tarificación. La investigación se nutre de artículos cientí...

  20. Discussion on Application of Biological Deodorization Technology for Steam of Oily Sewage Reservoir%二级压缩滑片式压缩机开发及其参数确定

    Institute of Scientific and Technical Information of China (English)

    樊秀刚

    2012-01-01

    多级压缩形式以其压缩比高、排气压力高、排量大、功耗低和整机效率高等优点,得到了广泛的应用,但由于其工作原理和具体工作状态的限制,以及润滑油的影响,使得多级压缩滑片式压缩机开发受到限制。文章对滑片式压缩机二次压缩状态的诸多基本参数进行了详细的分析与计算,意在论证并促进二级压缩乃至多级压缩技术在实际应用中的可行性。%The process principle, process flow and treatment requirements for steam treatment of oily sewage reservoir in ethylene plant with biological filter process were introduced, and the main affecting factors for operating effects of biological deodorization process system were discussed. It concluded that biological deodorization process could effectively treat the odor pollution resources as oil sewage in refining enterprises, so as to obviously improve air quality near the refining plant, which had significance for popularization in enterprises of the same industry.

  1. Discussion on Application of Biological Deodorization Technology for Steam of Oily Sewage Reservoir%含油污水池废气生物除臭技术应用探讨

    Institute of Scientific and Technical Information of China (English)

    张静

    2012-01-01

    The process principle, process flow and treatment requirements for steam treatment of oily sewage reservoir in ethylene plant with biological filter process were introduced, and the main affecting factors for operating effects of biological deodorization process system were discussed. It concluded that biological deodorization process could effectively treat the odor pollution resources as oil sewage in refining enterprises, so as to obviously improve air quality near the refining plant, which had significance for popularization in enterprises of the same industry.%介绍了应用生物滤池法除臭工艺技术对炼油乙烯装置含油污水池臭气处理的工艺原理、工艺流程和处理要求等,探讨了影响生物除臭工艺系统运行效果的主要因素。认为生物除臭工艺技术能有效地治理炼化企业含油污水类恶臭污染源,明显改善生产企业附近的空气质量,对同行业具有实际推广意义。

  2. 油田污水处理伴生含油污泥回收利用技术%Reutilization Technology of Associated Oily Sludge in Oilfield Sewage Disposal

    Institute of Scientific and Technical Information of China (English)

    孙玉青; 陈渊; 高申领; 李新丹; 田旭

    2013-01-01

    河南油田污水处理过程中伴生的含油污泥含水35.08%、油29.06%、泥质35.86%、150目筛余率4.21%,外观为黑硬膏状.油田含油污泥固相主要是由不同粒径的砂子和黏土组成的泥质颗粒,占97.45%,粒径小于63 μm的颗粒占84.02%,泥质粒径细小且分布集中.以油田含油污泥为主要原料,加入0.20%~0.25%JHW-1悬浮剂、0.3%~0.4% FSJ-1分散剂、2.5%~40%NT-1固化剂,得到油水井深部液流转向剂.实验表明,该液流转向剂浆体稳定、注入性好、强度较高(突破压力梯度大于0.28 MPa/cm),封堵率为88.2%~95.6%,且成本低廉适合大剂量深部注入.双管并联岩心实验表明,液流转向剂调剖后,低渗、高渗岩心的水驱采收率分别增加25.73%和17.11%.在河南油田现场应用56口井,措施井启动压力增加、吸水指数降低、注水压力上升、吸水剖面得到改善,共消耗含油污泥105118m,,累计增油17369t,降水90000 m3,增油、降水效果明显.%Black paste of oily sludge in the process of sewage treatment in Henan oilfield was analyzed, which consisted of 35.08% water, 29.06% oil, 35.86% argillaceous and 4.12% sieve rate of 150 mesh. The solid phase of oily sludge was composed of argillaceous particles such as sand and clay with different particle size, accounting for 97.45%, particle size smaller than 63 μm accounted for 84.02%. The argillaceous particle size was fine and distribution was concentrated. The deep fluid diversion agent with the main material of oilfield oily sludge was developed, which included 0.20%—0.25% JHW-1 suspension, 0.3%—0.4% FSJ-1 dispersant, 2.5%—4.0% NT-1 curing agent. The experiment results showed that the slurry had a good stability, poured nature, higher strength (the breakthrough pressure gradient>0.28 MPa/cm), 88.2%—95.6% core plugging rate, and low cost which was suitable for large scale of deep injection. Double parallel sand pipes experiment results

  3. Design simbiótico : cultura projectual, sistemas biológicos e sistemas tecnológicos

    OpenAIRE

    Parra, Paulo, 1961-

    2007-01-01

    Tese de doutoramento em Belas Artes (Design de Equipamento), apresentada à Universidade de Lisboa através da Faculdade de Belas Artes, 2008 A presente investigação, Design Simbiótico, centra-se nas áreas da Cultura Projectual, da Biologia e da Tecnologia, pretendendo demonstrar que é possível estabelecer analogias evolutivas entre os sistemas biológicos e os sistemas tecnológicos e propondo uma coevolução simbiótica entre ambos, denominada pelo autor de Cosimbiose. A dissert...

  4. Evolución de un sistema de manufactura flexible (FMS) a un sistema de manufactura integrada por computador (CIM)

    OpenAIRE

    Fúquene Retamoso, Carlos Eduardo; Pontificia Universidad Javeriana; Aguirre Mayorga, Hugo Santiago; Pontificia Universidad Javeriana; Córdoba Pinzón, Nazly Bibiana; Pontificia Universidad Javeriana

    2010-01-01

    el desarrollo de las máquinas herramientas, los elementos del control de la producción, los robots, computadores y las redes de comunicación han transformado los medios de manufactura existentes en sistemas de manufactura integrados y versátiles. Aquellas industrias que deseen mantenerse competitivamente en la era de la información y la globalización actual están obligadas a introducir tecnologías avanzadas de producción, orientadas a sistemas de manufactura flexible capaces de manejar los pr...

  5. SISTEMA DE GESTION DE CALIDAD ISO 9001: “JAMONES EL ENCINAR”

    OpenAIRE

    Castells-Mares, Ana

    2012-01-01

    El objeto del presente trabajo el diseño e implementación de un Sistema de Gestión de Calidad en la organización ficticia de Jamones el Encinar, S.L, y establecer los pasos a seguir para Integrar el Sistema de Gestión de Calidad con otros Sistemas de Gestión.

  6. El Sistema Fundamentals in Practice: An Examination of One Public Elementary School Partnership in the US

    Science.gov (United States)

    Simpson Steele, Jamie

    2017-01-01

    El Sistema is a Venezuelan program of social change that has inspired a worldwide movement in music education. El Sistema inspires social transformation and musical excellence to occur simultaneously and symbiotically. This study examines: What does El Sistema look like within the context of a public school partnership in the United States? How do…

  7. Work sampling

    OpenAIRE

    Salas Bacalla, julio; FII-UNMSM

    2014-01-01

    Work sampling is a method of indirect measurement, which means instantaneous observations, to determine the amount of uptime or downtime in a production process El muestreo de trabajo es un método de medición indirecto, que mediante observaciones instantaneas, permite determinar la cantidad de tiempo en actividad o inactividad en un proceso productivo

  8. Sistemas transparentes para gobiernos electrónicos eficientes

    Directory of Open Access Journals (Sweden)

    Andrade Castro, Jesús Alberto

    2007-05-01

    Full Text Available Este trabajo hace una reflexión crítica del papel que desempeñan los sistemas transparentes en el gobiernoelectrónico. La misión de los sistemas transparentes computarizados es desarrollar aplicaciones confiables y robustas,con el propósito de sustituir la fiscalización y los controles jurídicos y contables del comportamiento administrativo,por verdaderas evaluaciones que incluyan la participación del ciudadano, en el ejercicio transparente de la accióngubernamental. Teniendo como base la necesidad de tener aplicaciones para gobierno electrónico, el Laboratorio deInvestigación de Tecnologías y Sistemas de Información (LITSI de la Facultad de Ciencias de la Universidad del Zuliadesarrolla aplicaciones de minería de texto, para obtener datos que están envueltos en el metalenguaje de etiquetas(HTML contenido en las páginas WEB. Con el prototipo que hemos desarrollado, se ha hecho un intento por convertirinformación desde documentos tipos texto no estructurados que están en la WEB, en información factible de ser analizaday contrastada con las acciones y políticas públicas. Se pretende así, desarrollar sistemas transparentes eficientescon aplicaciones computarizadas que permitan al ciudadano ejercer el control social de la gestión gubernamental.

  9. Sistemas sanitarios alternativos para la ciudad de Tijuana, Baja California

    Directory of Open Access Journals (Sweden)

    Alberto Pombo

    2004-01-01

    Full Text Available En la ciudad de Tijuana, el tiempo promedio entre el asentamiento en las colonias periurbanas y la obtención del servicio de drenaje sanitario es de 14 años. Para mitigar esta problemática social proponemos una secuencia temporal y espacial de cuatro sistemas sanitarios alternativos para las áreas urbanas y periurbanas con población de menores ingresos y que carecen de acceso a la red de drenaje municipal. Nuestra propuesta incluye letrinas de pozo ventilado, fosas sépticas, excusado de bajo volumen de agua y sistema de drenaje simplificado, todos de bajo consumo de agua. Esta propuesta considera la construcción de un sistema sanitario básico de bajo costo e impacto, modificable a medida que se cuente con mejores ingresos. Con base en un análisis espacial de la distribución de servicios, se propone la localización de los distintos sistemas sanitarios a partir de la disponibilidad o carencia de agua entubada, así como ubicación y cercanía a la red de drenaje municipal.

  10. A TEORIA DE SISTEMAS APLICADA À SAÚDE

    Directory of Open Access Journals (Sweden)

    Maria Coeli Campedelli

    Full Text Available A autora tece considerações sobre a Teoria de Sistemas e sua aplicação na saúde e faz uma análise sucinta de alguns aspectos desta Teoria que foram abordados na V Conferência Nacional de Saúde, 1975.

  11. Al CERN prima fase sistema gestione dati LHC

    CERN Multimedia

    2003-01-01

    "Al via la prima fase per la realizzazione del sistema Lhc computing Grid (LCG), progettato per elaborare le quantita' di dati senza precedenti che, a partire dal 2007, saranno prodotte dagli esperimenti eseguiti con il nuovo grande acceleratore Large Hadron Collider (LHC), presso il Cern di Ginevra" 1 page

  12. Las candidaturas independientes en el sistema electoral chileno

    Directory of Open Access Journals (Sweden)

    Carlos Manuel Rosales

    2013-07-01

    Full Text Available Este trabajo presenta varios de los elementos legales y judiciales que deben tenerse en cuenta al momento de considerar la adopción y regulación de las candidaturas independientes. Estas propuestas se exponen a partir de la experiencia en el sistema electoral chileno.

  13. El fraude en los sistemas de información

    OpenAIRE

    Estévez Q., Yasnyr

    2013-01-01

    El artículo enfatiza en los efectos del fraude en las empresas e incluye los riesgos en las transacciones en sistemas de cómputo, esquemas de fraude informático, pasos para detectar el fraude, apoyo al Contador Público en la detección del fraude, el informe de hallazgos del fraude.

  14. Linfoma no-Hodgkin del sistema nervioso central

    OpenAIRE

    Iglesias Rozas, José Rafael, 1942-

    2000-01-01

    Diecisiete imágenes de un linfoma no-Hodgkin del sistema nervioso central en una paciente de 66 años. Seventeen pictures of a non-Hodgkin lymphoma of the central nervous system in a 66-year-old female patient.

  15. Incidencia de la banca universal en el sistema financiero venezolano

    Directory of Open Access Journals (Sweden)

    Marbelis Alejandra Nava Rosillón

    2011-01-01

    Full Text Available La banca universal es un modelo de banca que ofrece servicios integrales y múltiples con alta eficiencia operativa, mejor gestión de infraestructura y sistemas actualizados para mayor satisfacción de los clientes. Inicia en Venezuela en los años noventa en la búsqueda de modernizar las instituciones financieras. Por ello, esta investigación tiene como objetivo analizar la incidencia de la banca universal en el sistema financiero venezolano ante la fuerte crisis financiera de 1994-1995. Se trata de un estudio descriptivo con diseño documental. La banca universal dio paso a transformaciones, fusiones y adquisiciones de las instituciones financieras especializadas. El Grupo Provincial y Mercantil fueron los primeros en transformarse en banco universal. Hoy, esta banca posee la mayor participación en el Sistema Bancario Nacional, con 45% de instituciones; 86,79% de oficinas; 86,33% de trabajadores; 36,2% entidades con capital privado, 8,5% con capital público y altas captaciones. Se concluye que esta banca ha favorecido el sistema financiero venezolano en el largo plazo logrando su mayor fortalecimiento y un mejor funcionamiento mediante una nueva cultura organizacional, generación de empleo, mayor solidez, confianza y credibilidad de ahorristas e inversionistas.

  16. Las comunas en el sistema político venezolano

    OpenAIRE

    Mata Sandoval, Meralys

    2015-01-01

    El extinto Presidente Hugo Chávez Frías, en su afán por concentrar el máximo poder en el Ejecutivo Nacional, concretamente en su persona, comienza por querer instaurar en la República Bolivariana de Venezuela un Sistema Político inexistente en la Co

  17. The Story of Carora: The Origins of El Sistema

    Science.gov (United States)

    Carlson, Alexandra

    2016-01-01

    Venezuela's youth symphony program, the Fundación Musical Simón Bolívar, commonly referred to as "El Sistema," combines musical achievement with learning important life skills through orchestral practice and performance. Although the history most commonly reported outside Venezuela is of the program's director, José Antonio Abreu,…

  18. Linfoma no-Hodgkin del sistema nervioso central

    OpenAIRE

    Iglesias Rozas, José Rafael, 1942-

    1999-01-01

    Diecisiete imágenes de un linfoma no-Hodgkin del sistema nervioso central en una paciente de 66 años. Seventeen pictures of a non-Hodgkin lymphoma of the central nervous system in a 66-year-old female patient.

  19. Fertilidad del suelo a largo plazo en sistemas biointensivos

    NARCIS (Netherlands)

    Funes Monzote, F.R.; Hernándes, A.; Bello, R.; Alvarez, A.

    2008-01-01

    Mejorar y mantener la fertilidad de los suelos son prioridades para los sistemas agroecológicos. Junto a la preservación de la agrodiversidad, el uso eficiente del agua, la energía y otros recursos disponibles, un adecuado balance de nutrientes y vida en el suelo son condiciones importantes para gar

  20. Fertilidad del suelo a largo plazo en sistemas biointensivos

    NARCIS (Netherlands)

    Funes Monzote, F.R.; Hernándes, A.; Bello, R.; Alvarez, A.

    2008-01-01

    Mejorar y mantener la fertilidad de los suelos son prioridades para los sistemas agroecológicos. Junto a la preservación de la agrodiversidad, el uso eficiente del agua, la energía y otros recursos disponibles, un adecuado balance de nutrientes y vida en el suelo son condiciones importantes para gar

  1. Seguridad en Sistemas de Información

    OpenAIRE

    Valverde Álvarez, Evangelino

    2012-01-01

    Material de apoyo de la charla "Seguridad en Sistemas de Información (un recorrido a vista de pájaro)" para los alumnos de primer curso de la Escuela Superior de Informática de Ciudad Real (Abril de 2012).

  2. Hacia un sistema monetario y financiero internacional desarrollista

    Directory of Open Access Journals (Sweden)

    Patricia Gillezeau Berrios

    2006-01-01

    Full Text Available El artículo plantea que se vive una crisis que requiere una solución sistémica, más que una crisis económica en que se debate la mayoría de la población mundial, se vive un problema de crisis del desarrollo. La constante en el mundo es la inestabilidad y el desequilibrio estructural, se debe movilizar ideas para preparar al mundo en un orden de paz y desarrollo. El desafío fundamental es construir una amplia y durable estabilidad: Es esto posible en un mundo monetario sin reglas? El rediseño del orden monetario y financiero internacional y de la cooperación financiera internacional es una necesidad. La cuestión fundamental es decidir: ¿Cambio o continuidad del modelo? Desde 1944 se ha transitado del patrón oro, al patrón dólar, por lo que se propone un sistema que evolucione hacia un patrón basado en el desarrollo humano, por ser uno de los indicadores mas sólidos de evolución de la humanidad. El éxito del sistema propuesto depende de un consenso o acuerdo mundial previo, ya que el sistema actual se caracteriza por ser un sistema no consensuado, anárquico y desregulado.

  3. Sistemas no lineales en cosmología

    Directory of Open Access Journals (Sweden)

    Tonatiuh Matos

    2001-01-01

    Full Text Available Presentamos un resumen de los resultados obtenidos últimamente en el contexto de la cosmología. Vemos cómo los sistemas con campos escalares que pueden resolver el enigma de la materia oscura pueden tener un comportamiento no lineal tipo solitónico y definitivamente no perturbativo.

  4. Sistema bancario y de producción en Argentina

    Directory of Open Access Journals (Sweden)

    Víctor Fernández

    2012-01-01

    Full Text Available Los cambios macroeconómicos en la Argentina posteriores a la crisis 2001 abrieron un interesante escenario para indagar si las formas de valorización financiera del capital imperantes durante los años noventa han podido ser reemplazadas por formas acumulativas ligadas a la inversión productiva. Trabajando con el concepto de Sistema Social de Producción (ssp, y su adaptación para su uso en escenarios periféricos, y advirtiendo la importancia que adquiere el Sistema Financiero en dicho sistema, se analiza el Sistema Financiero Bancario argentino durante el periodo 1990-2010. El trabajo identifica la preeminencia de continuidades antes que cambios respecto del periodo de convertibilidad (1990-2001, lo cual afecta limitativamente la cualificación del ssp para insertarse por las vías altas de las cadenas globales y salir de su posición periférica.

  5. Ventajas y Dificultades del Sistema Presidencialista en Venezuela

    Directory of Open Access Journals (Sweden)

    Ricardo Antela Garrido

    2011-01-01

    Full Text Available El artículo se propone determinar si en general, el sistema de gobierno previsto en la Constitución venezolana de 1999, y principalmente la creación del Vicepresidente Ejecutivo, contribuyó a resolver o no, todo o parte de los problemas de diseño institucional atribuidos al modelo de presidencialismo previsto en la Constitución venezolana de 1961. Para ello, en primer término se abordan los problemas de diseño atribuidos al presidencialismo previsto en la Constitución de 1961 (Cap. 1; luego, se describen resumidamente las características sistema de gobierno previsto en la Constitución vigente de 1999, con énfasis en los principales cambios del sistema (Cap. 2, y por último, se determina si el sistema de gobierno previsto en esta Constitución, y principalmente la inserción del Vicepresidente Ejecutivo, resolvió o no, todo o parte de los problemas de diseño institucional atribuidos al modelo de presidencialismo previsto en la Constitución de 1961 (Cap. 3.

  6. The Story of Carora: The Origins of El Sistema

    Science.gov (United States)

    Carlson, Alexandra

    2016-01-01

    Venezuela's youth symphony program, the Fundación Musical Simón Bolívar, commonly referred to as "El Sistema," combines musical achievement with learning important life skills through orchestral practice and performance. Although the history most commonly reported outside Venezuela is of the program's director, José Antonio Abreu,…

  7. El "PNBpm" en el sistema de recursos propios cominitarios

    OpenAIRE

    Alfonso Utrilla de la Hoz

    1989-01-01

    El trabajo aquí presentado analiza las lineas generales de la reforma del sistema de recursos propios de la Comunidad Económica Europea, centrándose en el estudio del Producto Nacional Bruto a precios de mercado como nuevo componente del presupuesto de ingresos comunitarios.

  8. Fertilidad del suelo a largo plazo en sistemas biointensivos

    NARCIS (Netherlands)

    Funes Monzote, F.R.; Hernándes, A.; Bello, R.; Alvarez, A.

    2008-01-01

    Mejorar y mantener la fertilidad de los suelos son prioridades para los sistemas agroecológicos. Junto a la preservación de la agrodiversidad, el uso eficiente del agua, la energía y otros recursos disponibles, un adecuado balance de nutrientes y vida en el suelo son condiciones importantes para

  9. Las candidaturas independientes en el sistema electoral chileno

    OpenAIRE

    2013-01-01

    Este trabajo presenta varios de los elementos legales y judiciales que deben tenerse en cuenta al momento de considerar la adopción y regulación de las candidaturas independientes. Estas propuestas se exponen a partir de la experiencia en el sistema electoral chileno.

  10. O sistema, ontem e hoje = The system, yesterday and today

    Directory of Open Access Journals (Sweden)

    Nancy, Jean-Luc

    2014-01-01

    Full Text Available Será que a filosofia francesa possua um espírito de sistema?” Essa questão nos é colocada com uma habilidade que somos, por este fato mesmo, convidados a identificar, avaliar e contornar

  11. Sampling Strategy

    Science.gov (United States)

    2008-01-01

    Three locations to the right of the test dig area are identified for the first samples to be delivered to the Thermal and Evolved Gas Analyzer (TEGA), the Wet Chemistry Lab (WCL), and the Optical Microscope (OM) on NASA's Phoenix Mars Lander. These sampling areas are informally labeled 'Baby Bear', 'Mama Bear', and 'Papa Bear' respectively. This image was taken on the seventh day of the Mars mission, or Sol 7 (June 1, 2008) by the Surface Stereo Imager aboard NASA's Phoenix Mars Lander. The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

  12. O Direito à Saúde no Sistema Prisional

    Directory of Open Access Journals (Sweden)

    Gabrielle Jacobi KOLLING

    2013-04-01

    Full Text Available O direito à saúde é objeto de constante análise e, a cada momento, visualiza-se a necessidade de enfrentar diferentes interfaces desse direito fundamental. A complexidade inerente ao sistema social, e, por conseguinte, ao da saúde também, demanda-nos romper com a classificação de cidadãos de primeira e de segunda classe; isso não é republicano, tampouco democrático. A lógica dos desumanizados e excluídos (esquecidos e negligenciados deve ser cambiada pela lógica da inclusão. A análise enfocará a saúde no sistema prisional. Para isso, é condição de possibilidade analisarmos os condicionantes de saúde e os seus efeitos no panorama prisional-sanitário brasileiro. Observaremos, ainda, as ações governamentais para efetivar o direito à saúde no sistema prisional, em especial a Política Pública de Saúde “Plano Nacional de Saúde no Sistema Penitenciário”, que se apresenta como uma tentativa concreta de romper com a negligência do Estado em relação aos integrantes do sistema prisional, aos esquecidos, aos sem voz. ABSTRACT The right to health is matter of constant analysis and, at each moment the need to challenge the different interfaces of this basic right is visible. The innate complexity of the social system and, by consequence to the health system as well, demands that we break with the concept of first and second class citizens; this is not republican or even democratic. The de-humanized and excluded logic (forgotten and neglected must be traded for the inclusion logic. The analysis will focus the prison system’s health. For this is condition of possibility to analyze the health conditions and its effects in the Brazilian prison-sanitary scope. We will also observe the government’s actions to make the right to heath effective in the prison system, in special the Public Health Policy “Nacional Health Plan in the Prison System”, which is presented as a real attempt to break with the state’s negligence

  13. Sistemas Integrales de Gestión para Bibliotecas

    Directory of Open Access Journals (Sweden)

    Estefania Gomez Vega

    2016-04-01

    Full Text Available Los Sistemas Integrales de Gestión para Bibliotecas (SIGB, constituyen una herramienta fundamental en el dominio de la educación superior para la óptima gerencia del patrimonio bibliográfico. En este trabajo, se busca determinar cuál de los 2 (dos SIGB candidatos es el más adecuado para heredar las funciones de gestión de las Bibliotecas Académicas de la UNPA. Los SIGB a comparar son los sistemas Koha (reconocido como el primer software de gestión de bibliotecas libre, y PMB (también un software libre que está cobrando gran reconocimiento en numerosos países europeos. Este estudio comparativo se origina básicamente por dos motivos: (i el cambio en la reglamentación vigente producido en 2011 y, como consecuencia, la necesidad de que el sistema utilizado por las Bibliotecas de la UNPA cumpla con esta reglamentación, y (ii la necesidad de aumentar la compatibilidad del sistema instalado para que pueda ser accedido y utilizado en su totalidad desde dispositivos portátiles, tales como celulares y tablets. A tal efecto, el presente trabajo propone un Framework Comparativo para analizar los SIGB candidatos aplicando un conjunto de Criterios de Evaluación, tanto a nivel de sistema, como así también, a nivel de módulo. Los resultados de esta investigación tienen como objetivo asistir y proveer sustento a la selección del SIGB que sea más adecuado a las necesidades de la UNPA.

  14. DANOS MECÂNICOS OCASIONADOS POR SISTEMAS DOSADORES DE SEMENTES MECHANICAL DAMAGE CAUSED BY SEED METERING SYSTEMS

    Directory of Open Access Journals (Sweden)

    Paulo Alcanfor Ximenes

    2007-09-01

    Full Text Available

    Avaliaram-se os efeitos de danos mecânicos ocasionados por cinco sistemas dosadores de sementes, em quatro culturas. Amostras das sementes foram coletadas antes e após passarem pelos sistemas dosadores e foram submetidas a testes de pureza, germinação e vigor. Não houve diferença entre os efeitos de danos mecânicos ocasionados pelos sistemas dosadores empregados nas sementes de milho. Para as sementes de feijão, menores efeitos foram verificados quando da utilização dos dosadores pneumático a vácuo e copo dosador. O sistema rotor acanalado causou menores danos às sementes de arroz e os sistemas disco  horizontal perfurado e copo dosador foram os que menos danificaram as sementes de soja. O sistema dosador pneumático a vácuo ocasionou o maior índice de dano mecânico nas sementes de soja.

    PALAVRAS-CHAVE: Semeadoras; distribuidores de sementes; rotor acanalado.

    Effects of mechanical damage caused by five seed metering systems were evaluated in four crops. Seed samples were collected before and after passing through the measuring systems and submitted to tests of purity, germination and vigor. There was no difference in the level of mechanical damage caused by the metering systems used for maize seeds. For common bean seeds, minor effects were verified when using the vacuum metering disk and the feed cup. The fluted feed system showed the best performance for rice seeds, and the horizontal perforated disk and feed cup systems exhibited the best results for soybean seeds. The vacuum metering disk system caused the highest level of mechanical damage to soybean seeds.

    KEY-WORDS: Planter machine; seed distributor; fluted feed.

  15. Características del conocimiento transferido como determinantes del rendimiento de los sistemas de franquicia

    Directory of Open Access Journals (Sweden)

    Beatriz Minguela Rata

    2009-06-01

    Full Text Available En este trabajo se pretende analizar la influencia de la naturaleza tácita y el valor del conocimiento (dos características del conocimiento determinantes de la facilidad con la que se puede transferir el mismo en el rendimiento de los sistemas de franquicia. Se ha llevado a cabo un análisis de regresión lineal sobre una muestra de establecimientos franquiciados en diferentes cadenas de franquicia y sectores de actividad que operan en España, midiendo el rendimiento tanto de manera objetiva como subjetiva y tomando el tipo de actividad llevada a cabo por el establecimiento franquiciado como variable de control. Los resultados parecen indicar que la naturaleza tácita del conocimiento influye de manera negativa en el rendimiento de los sistemas de franquicia mientras que el valor del conocimiento afecta de manera positiva.In this paper the influence of tacitness and value of knowledge on the performance of franchise systems are studied. With this aim, a linear regression analysis is conducted on a sample of franchisee of different franchise chains and sectors of activity operating in Spain. In the model we added a control variable, named transformation, which representa the kind of activities carried out in the franchisee units: just commercial or transformative and commercial activities. The findings show that tacit knowledge has a negative impact on franchise systems performance, the value of knowledge affects it in a positive manner whereas the control variable is significant.

  16. Diques camptoníticos en el Sistema Central Español

    Directory of Open Access Journals (Sweden)

    Villaseca, C.

    1986-06-01

    Full Text Available Mineralogical and geochemical characters of camptonite dykes with ocllar textures and diatreme facies of the Sistema Central Español have been determined. Camptonites are ultrabasic and peralkaline in composition, with moderate potassic character.
    The ocellar textures in these dykes may be due to immiscibility phenomena berween a syenitic-like liquid and a lamprophyre magma. The appearance of diatreme breccia facies, filled with xenoliths of shallow granitic rocks and granulites undepleted in LIL elements, provides an exceptional sampling of anomalous continental crust in this area.

    Se determinan los caracteres mineralógicos y geoquímicos de un conjunto de diques camptoníticos de dirección N-S con texturas ocelares y facies de tipo diatrema que aparecen en el Sistema Central Español, Las camptonitas son de composición ultrabásica peralcalina, de carácter moderadamente potásico.
    La presencia de texturas ocelares en estos diques puede interpretarse debido a un fenómeno de inmiscibilidad entre un líquido de tipo sienítico y el magma lamprofídico. La aparición de facies brechoidales de tipo diatrema, englobando xenolíticos de rocas graníticas superficiales, y rocas esquistosas y de granulitas ricas en elementos incompatibles, proporciona un muestreo excepcional de la corteza continental anómala en este área.

  17. En búsqueda del ADN y las influencias en algunos sistemas presidenciales y parlamentarios

    OpenAIRE

    Jorge CARPIZO

    2009-01-01

    El trabajo examina las recíprocas influencias entre las Constituciones de seis países: tres con sistema presidencial, dos con sistema parlamentario y uno con sistema semipresidencial. Los tres últimos pertenecen a Europa. Los sistemas presidenciales de América Latina se inspiraron en la Constitución Americana, tanto como en alguna europea, especialmente la española de 1812. Los enormes poderes presidenciales en América Latina llevaron a introducir en el sistema preside...

  18. PRESENTACIÓN DE LA CARRERA DE INGENIERÍA DE SISTEMAS

    OpenAIRE

    EDGAR SERNA MONTOYA

    2009-01-01

    En el año 2009 la Facultad cuenta con los siguientes programas activos:* Pregrado en Ingeniería de Sistemas Presencial Registro Calificado Código SNIES 11846 Resolución No. 2293 del 03 de octubre de 2002. Título que otorga: Doble titulación, Ingeniero de Sistemas y Tecnólogo en Sistemas.* Ciclo de Profesionalización para Tecnólogos en Sistemas Presencial Título que otorga: Ingeniero de Sistemas.* Tecnología en Sistem...

  19. Diseño de un sistema de contraseñas gráfico

    OpenAIRE

    Campos Suárez, Sandra

    2014-01-01

    El objetivo principal de este proyecto es la creación de un nuevo sistema de contraseña que intente reducir las vulnerabilidades de los sistemas actuales, como el sistema de contraseña gráfica de Google Android. L'objectiu principal d'aquest projecte és la creació d'un nou sistema de contrasenya que intenti reduir les vulnerabilitats dels sistemes actuals, com el sistema de contrasenya gràfica de Google Android. Master thesis for the ICT Security management program.

  20. El sistema inmune en los mamíferos: las defensas del cuerpo

    OpenAIRE

    2014-01-01

    El sistema inmune es un complejo sistema de mecanismos superpuestos que el cuerpo de los mamíferos posee para defenderse de los agentes patógenos que le causan daño. En este sentido el cuerpo de los mamíferos, posee tres sistemas bien definidos: las barreras físico-químicas, el sistema inmune innato y el sistema inmune adquirido. La primer línea de defensa la constituyen las barreras físico-químicas, entre las que podemos mencionar a la piel, las mucosas, enzimas y proteínas, tos, estornudos,...

  1. LA EVOLUCIÓN DE SISTEMAS COMPLEJOS: EL CASO DEL SISTEMA INMUNE EN ANIMALES

    Directory of Open Access Journals (Sweden)

    LUIS F. CADAVID

    2009-01-01

    Full Text Available El sistema inmune en animales comprende una serie de mecanismos celulares y moleculares que de manera conjunta mantienen la integridad fisiológica y genética de los organismos. Convencionalmente se ha considerado la existencia de dos clases de inmunidad, la innata y la adaptativa. La primera es ancestral, con variabilidad limitada y baja discriminación, mientras que la segunda es altamente variable, específica y restringida a vertebrados mandibulados. La inmunidad adaptativa se basa en receptores de antígeno que se rearreglan somáticamente para generar una diversidad casi ilimitada de moléculas. Este mecanismo de recombinación somática muy probablemente emergió como consecuencia de un evento de transferencia horizontal de transposones y transposas bacterianas en el ancestro de los vertebrados mandibulados. El reciente descubrimiento en vertebrados no mandibulados e invertebrados de mecanismos de inmunidad adaptativa alternos, plantea la necesidad de considerar nuevos elementos en la construcción de un modelo evolutivo de la inmunidad en animales. Algunos de esos elementos se esbozan en este ensayo.

  2. PRESENTACIÓN DE LA CARRERA DE INGENIERÍA DE SISTEMAS

    Directory of Open Access Journals (Sweden)

    EDGAR SERNA MONTOYA

    2009-06-01

    Full Text Available En el año 2009 la Facultad cuenta con los siguientes programas activos:* Pregrado en Ingeniería de Sistemas Presencial Registro Calificado Código SNIES 11846 Resolución No. 2293 del 03 de octubre de 2002. Título que otorga: Doble titulación, Ingeniero de Sistemas y Tecnólogo en Sistemas.* Ciclo de Profesionalización para Tecnólogos en Sistemas Presencial Título que otorga: Ingeniero de Sistemas.* Tecnología en Sistemas de Información Presencial Registro Calificado Código SNIES 11850 Título que otorga: Tecnólogo en Sistemas de Información.* Especialización en Gerencia de la Tecnología Presencial Registro Calificado Código SNIES 53168 Título que otorga: Especialista en gerencia de la Tecnología.

  3. MICROJARDIM CLONAL DE MIRTILEIRO EM SISTEMAS DE CULTIVO SEM SOLO

    Directory of Open Access Journals (Sweden)

    LUANA BORGES AFFONSO

    2015-12-01

    Full Text Available RESUMO O uso de microjardins clonais em sistemas de cultivo sem solo para fornecimento de material propagativo na cultura do mirtileiro (Vaccinium spp. pode trazer grandes avanços na produção de mudas dessa cultura. O objetivo desta pesquisa foi avaliar a produção de microestacas e a sobrevivência de plantas matrizes de mirtileiro micropropagadas das cultivares Woodard e Aliceblue, em dois sistemas de cultivo. Os sistemas de cultivo utilizados foram o semi-hidropônico (floreiras com substrato de areia e fornecimento diário de solução nutritiva e o com substrato organomineral (sacos plásticos com substrato comercial e fornecimento de solução nutritiva a cada 15 dias. Após o período de 90 dias do plantio das plantas matrizes, foram iniciadas as coletas de microestacas, as quais foram realizadas a cada 60 dias, com exceção do período de inverno, em que as coletas foram realizadas a cada 90 dias, totalizando ao final do experimento onze coletas. O experimento foi constituído como um fatorial 2 x 2 x 11 (sistemas x cultivares x coletas, em delineamento inteiramente casualizado, com três repetições de 12 plantas cada. Foram avaliadas a produção total de microestacas ao final das onze coletas, o número de microestacas produzidas por planta matriz a cada coleta, a sobrevivência das plantas matrizes ao final das onze coletas e a sobrevivência das plantas matrizes a cada coleta. Os resultados indicaram que o sistema semi-hidropônico foi superior ao substrato organomineral para a produção de microestacas de ambas as cultivares. A maior produtividade total de microestacas ocorreu no sistema semi-hidropônico combinado com a cultivar Aliceblue, com produção total média de 237,67 microestacas. Porém, nesta condição, houve menor sobrevivência das plantas matrizes. A produção de microestacas apresentou alternância ao longo das coletas. A sobrevivência das plantas matrizes diminuiu após sucessivas coletas. Após as

  4. LA REFORMA DEL SISTEMA GENERAL DE SEGURIDAD SOCIAL EN SALUD

    Directory of Open Access Journals (Sweden)

    Gustavo Malagón Londoño

    2011-01-01

    Full Text Available

    La Academia Nacional de Medicina de Colombia en repetidas ocasiones, desde el año 1998, ha denunciado las notables defi ciencias del Sistema General de Seguridad Social en Salud (SGSSS que implantó la Ley 100 de diciembre 23 de 1993. 

    El SGSSS, que debiera ser sistema de aseguramiento con propósito social, se ha convertido en negocio donde priman los intereses económicos con descuido en la calidad de los servicios; hizo profunda crisis, principalmente por causa de los excesivos costos que conlleva el modelo de intermediación comercial. Se ha creado una inaceptable posición oligopólica dominante de los aseguradores, que parece haber suplantado al estado en la defi nición de las políticas y en la orientación del SGSSS e interfiere la buena prestación de los servicios. Manifestación prominente de esto es la creciente y descontrolada integración vertical. 

    El sistema colombiano de intermediación comercial es costoso, inequitativo, ineficiente y va contra los principios constitucionales que definen la salud como derecho humano, en detrimento del bien común.

    El SGSSS, a los 18 años de su implantación, aún no cuenta con un sistema de información y las bases de datos existentes en las EPS, y también en el FOSYGA, distan de ser confiables. Se reconoce que un sistema de salud es en esencia un sistema de información. Los hospitales y clínicas de Colombia, especialmente las instituciones de carácter público, tienen una cartera que, se estima, es cinco o seis veces mayor que la cartera reclamada por las EPS, buena parte de la cual ya es de difícil cobro. Sin embargo, la prioridad ha sido resolver el problema económico de las EPS, no el de los hospitales.

    Son muchas las voces que claman por un riguroso control de la manera como las EPS invierten los recursos de la salud, de carácter público por ser recursos parafiscales. Las EPS muestran un grande y rápido crecimiento patrimonial y han

  5. 某医学院校新生油性皮肤者面部蠕形螨感染调查%Survey of facial Demodex infection among medical college students with oily skin

    Institute of Scientific and Technical Information of China (English)

    田新利

    2011-01-01

    Aim To survey the current status of Demodex infections in Xingtai Medical College students with oily skin.Methods Transparent adhesive tape was used for survey of Demodex infection in students of Xintai Medical College.Results A total of 804 students were surveyed and 306 students were with oily skin,accounted for 38.3% .The total infection rate of Demodex was 34.4%(106/308). The infection of Demodex folliculorum accounted for 50.9%(54/ 106) was higher than that of Demodex brevis(20.8%,22/106)(P<0.01, )and mixed infection occupied 28.3%(30/106). Conclusion Demodex folliculorum and Demodex brevis infection predominated in students and preventive and control measures be taken.%目的 调查某医学院校新生油性皮肤者面部人体蠕形螨的感染情况,并分析人体蠕形螨感染的影响因素,为特定人群蠕形螨的防治提供依据.方法 对部分新生进行问卷调查,并对油性皮肤者面部蠕形螨的感染进行检查,采用透明胶带粘贴过夜法查螨虫.胶带置于光镜下检查,阳性片计数虫数并进行虫种鉴定.结果 共调查804名学生,其中油性皮肤者308名,占38.3%.油性皮肤者面部蠕形螨感染情况如下,总感染率为34.4%(106/308),单纯毛囊蠕形螨感染占50.9%(54/106),单纯皮脂蠕形螨感染占20.8%(22/106),二者差异有统计学意义(χ2=21.0,P<0.01),混合感染占28.3%(30,106).轻度感染占94.3%(100/106).鼻侧感染54.7%(58,106)较额部47.1%(50/106)、鼻尖35.8%(38/106)高,前二者与鼻尖差异有统计学意义(χ2=7.61,P<0.01).结论 该校新生油性皮肤者人体蠕形螨普遍,但以轻度感染为主,毛囊蠕形螨感染高于皮脂蠕形螨,感染以鼻侧、额部为主,感染与生活习惯有关.

  6. Validation of a High-Performance Liquid Chromatography method for the determination of vitamin A, vitamin D3, vitamin E and benzyl alcohol in a veterinary oily injectable solution

    Directory of Open Access Journals (Sweden)

    Maria Neagu

    2015-06-01

    Full Text Available A new simple, rapid, accurate and precise high – performance liquid chromatography (HPLC method for determination of vitamin A, vitamin D3, vitamin E and benzyl alcohol in oily injectable solution was developed and validated. The method can be used for the detection and quantification of known and unknown impurities and degradants in the drug substance during routine analysis and also for stability studies in view of its capability to separate degradation products. The method was validated for accuracy, precision, specificity, robustness and quantification limits according to ICH Guidelines. The estimation of vitamin A, vitamin D3, vitamin E and benzyl alcohol was done by Waters HPLC system manager using gradient pump system. The chromatographic conditions comprised a reverse-phased C18 column (5 µm particle size, 250 mm×4.6 mm i.d. with a mobile phase consisting of tetrahydrofurane, acetonitrile and water in gradient elution. The flow rate was 0.8 ml/min and 2.0 ml/min. Standard curves were linear over the concentration range of 16.50 µg/ml to 11.00 mg/ml for vitamin A, 10.05 µg/ml to 6.70 mg/ml for vitamin E, 0.075 µg/ml to 0.050 mg/ml for vitamin D3 and 1.25 mg/ml to 5.00 mg/ml for benzylalcohol. Statistical analyses proved the method was precise, reproducible, selective, specific and accurate for analysis of vitamin A, vitamin D3, vitamin E, benzyl alcohol and impurities.

  7. New valorization process for refinery slop oil and oily wastes by hetero-azeotropic distillation; Nouveau procede de valorisation des ''slops'' de raffineries et dechets huileux par distillation heteroazeotropique

    Energy Technology Data Exchange (ETDEWEB)

    Lucena, E. [Universidad Centrocidental Lisandro Alvarado, Decanato de Ingenieria Civil, Lab. de Calidad Ambiental, Barquisimeto (Venezuela); Verdun, P.; Aurelle, Y. [Institut National des Sciences Appliquees (INSA), Dept. de Genie des Procedes Industriels, Lab. d' Ingenierie des Procedes de l' Environnement (EA 833), 31 - Toulouse (France); Secq, A. [TotalFinaElf, Centre de Recherche Gonfreville, Dept. Procedes et Raffinage, 76 - Harfleur (France)

    2003-07-01

    The petroleum exploitation, at the production level as well as at the refining process, produces important amounts of oily wastes that have a 'mayonnaise-like' mud appearance, called slops oils. These slop oils are very stable inverse water emulsions in crude oil containing solid sediments. The proportion of each of the three phases is very variable from one slop oil to another, however, the watery phase is often majority, from 40 to 80% of the mixture. The slop oils, up to the present, constitute a waste with very little or no valorization at all. The main processing methods used today, incineration and centrifugation, do not allow carrying out a total separation of the present liquid (water and oil) and solid phases. Moreover, they are not optimal from the economic and ecological point of view as well as from the energetic point of view. The processing technique of the petroleum slop oils proposed in this study is based on distillation principles, specifically on the hetero-azeotropic distillation. The method consists in forming a hetero-azeotropic mixture adding a carrier (kerosene) to the slop oil, then distilling the mixture and extracting a distillate, water and carrier, causing simultaneously a destabilization of the emulsion. By simple condensation of the distillate, the water is separated from the kerosene, which can be recycled. After distillation, the obtained dehydrated oil remains can be valorized in the distillation units of the refinery. This study points out the relevance of the proposed method, which presents the advantages of obtaining a complete separation of the phases and without generating any remainder sub-product from it. Moreover, it perfectly fits in the processing logic of any oil refinery. (authors)

  8. The rapid start-up technology for oily waste water biochemical treatment system in oilfield%油田含油污水生化处理系统快速启动技术

    Institute of Scientific and Technical Information of China (English)

    庄建全; 罗江涛; 吴波; 林刚; 纪艳娟; 郭鹏

    2013-01-01

    Due to the effect of high salinity of oily wastewater and other biological inhibitors,it is difficult to improve the microbial enzyme activity and the microbial enzyme growth was inhibited.As a result,the startup time of biochemical system is long or even failure.For improving the toleration of microorganism to oilfield wastewater,the microbial enhancer in bilolgical contact oxidation was analyzed and screened.Meanwhile,the biofilm formation technology was studied in order to determinate the reasonable salinity increase speed,shorten the startup time of biochemical systems,and provide basic de-sign parameters for the field system start-up.%受油田含油污水高矿化度及其他生物抑制剂等条件的影响,微生物酶活性难以提高,抑制其生长,导致生化系统启动时间长甚至失败。因此对生物接触氧化法中微生物强化剂配方分析筛选,提高微生物对油田污水的耐受度,同时对挂膜工艺研究,确定合理的盐度增加速度,从而缩短生化系统启动时间,为现场系统启动提供基础设计参数。

  9. Treatment of Oily Wastewater in RE′s Saponification Using Polystyrene Resin%聚苯乙烯树脂处理稀土皂化含油废水试验研究

    Institute of Scientific and Technical Information of China (English)

    张文娟; 马莹; 侯少春; 李娜; 包呈敏; 李二斗

    2015-01-01

    In the paper ,using polystyrene resin to treatment oily wastewater in RE′s saponification was studied .The saturated absorption capacity for oil of polystyrene resin and the influence of oil concentration in the wastewater ,wastewater flow rate ,processing time and water quantity on removal of oil were examined .The results show that the saturated absorption capacity for oil of polystyrene resin is about 91 mg/g ,the removal of oil decreases with increasing oil concentration in the influent . However ,for the RE′s saponification wastewater which oil concentration is 562 .3 mg/L ,the removal rate of oil is more than 87% .The removal rate of oil increased when influent flow rate decreases .After adsorption equilibrium ,the removal rate of oil decreases sharply with extending processing time and increasing w ater quantity .%研究了用聚苯乙烯树脂处理稀土皂化含油废水,考察了聚苯乙烯树脂对油的饱和吸附容量以及进水含油浓度、流速、处理时间和水量对油去除率的影响。结果表明:聚苯乙烯树脂对油的饱和吸附容量较高,约为91 mg/g ;树脂除油率随进水油浓度增大而降低,但对于油质量浓度为562.3 mg/L的稀土皂化废水,油去除率达87%以上;进水流速减小,油去除率增大;吸附平衡后,随处理时间延长和处理水量增加,油去除率急剧下降。

  10. Isolation of an Excellent Bio-flocculant-producing Strain and Its Application in the Treatment of Cold-rolling Waste Oily Water%1株高效产絮凝剂菌株的分离及其在冷轧含油废水处理中的应用

    Institute of Scientific and Technical Information of China (English)

    雷国元; 丁翠萍; 杨家轩

    2011-01-01

    从土壤中分离出1株高效产絮凝剂菌株T-3,经形态学特征分析、生理生化实验及16S rDNA序列分析,鉴定为克雷伯氏菌(Klebsiella sp.).研究了该菌株的培养条件,如pH值、温度、碳源、氮源对产絮凝剂性能的影响.结果表明,该菌株对碳源、氮源有较普遍的适应性;初始pH值为9,培养温度为25℃时,产絮凝剂性能较好.经过糖、蛋白质的呈色反应、紫外扫描及Fourier变换红外光谱分析,发现该菌株所产生的絮凝剂中含有—OH和—COO-,絮凝剂为阴离子型絮凝剂,其主要成分是多糖.将该絮凝剂用于冷轧含油废水处理,取得了良好的效果.当CaCl2、絮凝剂、聚合氯化铝用量分别为4 g.L-1、10%(体积分数)和1 g.L-1,pH值为7时,油含量、COD浓度和浊度分别从4 819 mg.L-1、28 456.8 mg.L-1、3 950降到10 mg.L-1、218.4mg.L-1、1.36,去除率分别为99.79%、92.32%和99.97%.絮凝剂与油滴颗粒之间通过范德华力、氢键及Ca2+的配位桥联而发生相互作用,其中Ca2+的配位桥联作用最为重要.%An excellent strain(designated as T-3) which produces bio-flocculants was isolated from soil samples,and identified as Klebsiella sp.species based on the analysis of morphology,physiology and biochemistry and 16S rDNA sequences measurement.The effects of culture conditions such as pH values,temperature,carbon sources and nitrogen sources on bio-flocculants production by T-3 strain were studied.The experiment results show that T-3 strain has better adaptability to carbon sources and nitrogen sources,and higher capacity of bio-flocculants was obtained when the initial pH value of culture and temperature were 9 and 25℃ respectively.Based on the colorimetric reactions of proteins and polysaccharide substance,ultraviolet scanning analysis and Fourier Transform Infrared Spectroscopy analysis,it is found that the bio-flocculants produced by T-3 strain contains —OH and —COO-groups and belongs to

  11. tortura carcerária : sobrepena do sistema penal brasileiro

    OpenAIRE

    2013-01-01

    Essa dissertação é um estudo multidisciplinar que consiste na revisão de literatura-bibliográfica acerca do objeto: tortura carcerária e a analisa como sobrepena privativa de liberdade do subterrâneo sistema penal brasileiro. Donde mantém relações particulares, próprias e específicas com as agências que fazem e movem de modo desarmônico tal sistema: as agências políticas promovem a programação constitucional e legal que definem o contorno do crime de tortura, as judiciárias enclausuradas e...

  12. ALMACÉN DE CARBONO EN SISTEMAS AGROFORESTALES CON CAFÉ

    OpenAIRE

    William Espinoza-Domínguez; L. Krishnamurthy; Antonio Vázquez-Alarcón; Antonio Torres- Rivera

    2012-01-01

    El presente estudio se realizó con el objetivo de estimar el almacén de carbono en sistemas agroforestales (SAF) con base en café en la región de Huatusco, zona de mayor producción de café (Coffea arabiga L.) en el estado de Veracruz, México, a fin de obtener información cuantitativa sobre el potencial de mitigación de carbono en los SAF de la región. Para ello, se estimaron los reservorios de carbono en biomasa vegetal y la materia orgánica edáfica existentes en sistemas agroforestales de ca...

  13. Durabilidad de las armaduras en el sistema Dragados-Plastbau

    Directory of Open Access Journals (Sweden)

    Andrade Perdrix, M. Carmen

    1986-09-01

    Full Text Available Not Available.En un sistema de las características del presente, los elementos metálicos que pueden sufrir corrosión son principalmente la malla y los conectores que atraviesan el poliestireno. La porosidad del microhormigón y el no siempre suficiente espesor de recubrimiento pueden permitir una carbonatación del microhormigón que alcance la malla durante el período de vida útil previsto para la estructura. Este riesgo de corrosión por carbonatación viene acrecentado en este sistema particular por una posible aparición de fisuras (retracción, movimientos de dilatación y asentamientos diferenciales, etc..

  14. El sujeto como sistema (Séptimas Conferencias Aranguren, 1998

    Directory of Open Access Journals (Sweden)

    Castilla del Pino, Carlos

    1999-05-01

    Full Text Available Not available

    El sujeto es un sistema de producción, reconstrucción, deconstrucción y almacenamiento de yoes con miras a la concreta actuación en un contexto determinado. Hay yoes imaginados (prolépticos, anticipados, proyectos de yoes actualizados y yocs fantaseados (y soñados. Los yoes se constituyen en módulos que el sujeto, como sistema , reutiliza en ulteriores contextos . El sujeto controla la actuación del yo creado para la situación, y lo modifica si su actuación no es del tipo adecuado para el logro del propósito del sujeto. El lugar del sujeto es el neocortex prefrontal; el del yo, el cuerpo y lo que el sujeto le exige hacer para la interacción real o virtual.

  15. Teoría general de los sistemas

    OpenAIRE

    Rovaletti, María Lucrecia; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),

    1989-01-01

    El concepto de sistema aparece ya en la visión holística y teleológica de Aristóteles, en el "orden jerárquico" de Dionisio Aeropagita (aunque se utilice en otro contexto); en la "coincidencia oppositorum" de Nicolás de cusa; en la jerarquía de las mónadas de Leibnitz; en la tesis, antítesis y síntesis del proceso dialéctico (Hegel y Marx). De tal modo que es posible afirmar con I., von Bertalanffy que "la nociónde sistema es tan vieja como la filosofía europea".

  16. Explorando sistemas dinámicos 3d no lineales

    OpenAIRE

    Haramburu, Pablo; Delrieux, Claudio

    2005-01-01

    La finalidad de la Visualización Científica es ayudar en la comprensión y el análisis de determinados problemas científicos. Un modelo matemático utilizado muy frecuentemente para la representación de problemas reales en muchas disciplinas es el de los sistemas dinámicos. Es posible encontrarlos en ecología, electrónica, mecánica no lineal, dinámica de fluídos, matemática, economía, etc. En la mayoría de los casos, estos sistemas no son resolubles en forma analítica, por lo que su adecuada...

  17. Evaluación de un sistema experimental de acuaponia

    Directory of Open Access Journals (Sweden)

    M. García-Ulloa

    2005-01-01

    Full Text Available Se evaluó un sistema experimental de acuaponia, incorporando la producción de tilapia (Oreochromis mossambicus y pepino (Cucumis sativus durante 75 días. Los peces (90 g de peso promedio inicial se mantuvieron en un tanque de 500 l, a una densidad de 0.6 peces/litro, mientras que 40 plántulas de pepino se sembraron en 2 camas de arena estéril. Las plantas se regaron con agua de desecho de las tilapias, con un sistema de recirculación de agua. Cada semana se registraron las concentraciones de amonia no ionizada, nitritios y nitratos. Al final del cultivo, los peces crecieron 25 g, en promedio, y se produjeron casi 5 kg de pepino. Las curvas de compuestos nitrogenados mostraron un flujo de nutrientes para las plantas y aporte de agua sin niveles peligrosos de amonia y nitritos para los peces.

  18. La credibilidad del sistema de banda cambiaria de Venezuela.

    Directory of Open Access Journals (Sweden)

    Maria I. Campos

    2010-05-01

    Full Text Available Este artículo estudia la credibilidad del régimen cambiario de bandas de fluctuación crecientes a tasa constante de Venezuela durante el periodo julio de 1996-febrero de 2002. Mostramos que los análisis de credibilidad aplicados a zonas objetivo, introduciendo algunas modificaciones, también pueden utilizarse para estudiar la credibilidad de sistemas cambiarios de bandas de fluctuación crecientes a tasa constante. En este trabajo aplicamos tanto el denominado test de credibilidad de Svensson como el método de ajuste de la deriva. Con ambos métodos obtenemos resultados similares en cuanto al alto grado de credibilidad del sistema durante el periodo analizado.

  19. O SISTEMA RENINA ANGIOTENSINA – REVISÃO

    Directory of Open Access Journals (Sweden)

    André Luiz Baptista Galvão

    2015-12-01

    Full Text Available The renin-angiotensin system (RAS it is an important hormone system related to homeostasis, being classified initially as only one endocrine system, whose main hormone, angiotensin II has several important biological actions. In particular, it is now known that this system has a number of other enzymes, resulting in the formation of biologically active peptides which interact with specific receptors, modulating the activity of this system as a whole. In this context, the RAS is much broader than originally proposed, determining physiological or pathological processes that are essential to the functioning of the cardiovascular system. The contribution predominant physiological RAS is related to the balance of cell growth and proliferation, as well as important mediator of adaptive responses in the cardiovascular system. Specifically, angiotensin II, may regulate the expression of growth factors, cytokines, adhesion molecules, which are involved in cell growth/apoptosis, fibrosis and vascular inflammation, as well as aldosterone is also involved in inflammation and fibrosis cells the vascular endothelium. Describe the latest scientific knowledge related to RAS it is the purpose of this literature review. O sistema renina angiotensina (SRA trata-se de um importante sistema hormonal relacionado à homeostase, sendo classificado inicialmente como apenas um sistema endócrino, cujo principal hormônio, a angiotensina II possui diversas ações biológicas importantes. Atualmente é sabido que este sistema possui inúmeras outras enzimas, que formam peptídeos biologicamente ativos, que interagem com receptores específicos, modulando a atividade deste sistema. Neste contexto, o SRA é muito mais amplo do que inicialmente proposto, participando de processos fisiológicos ou patológicos que são fundamentais para o funcionamento do sistema cardiovascular e sistema renal. A contribuição fisiológica predominante SRA está relacionada ao equilíbrio do

  20. Preparation of the novel colloidal liquid aphrons and the investigation of its application on treatment oily sludge%一种新型胶质液体泡沫的制备及其在处理含油污泥中的应用研究

    Institute of Scientific and Technical Information of China (English)

    马少华; 付立国; 习丽

    2012-01-01

    The novel sulfonate anion surfactants were acquired through a two-step method. The structure of the compounds synthesized were confirmed by IR and elemental analysis. Secondly, a novel colloidal liquid aphrons were formed by two sorts of surfactant, solving in non-polar solvent and polar solvent water. Their sizes and viscosities are mainly affected by the phase volume ratio (PVR). Its stability was researched by conductive method, and its tnicrostructure was identified by microscopic observation. Tlie removing rule of oily sludge resources regeneration using colloidal liquid aphrons was studied. The mechanism of oily sludge resources regeneration was analysed briefly. It is found that the stable CLA system removed oil from oily sludge and the CLA with the novelsulfonate anion surfactant shows a good extraction abilitity. The result of orthogonal experiment indicated that the treating temperature and treating amounts of oily sludge have significant effect on the regeneration yield of oily sludge resources regeneration. The optimum conditions were: treating time 20min, treating temperature 45t, treating amounts of oily sludge 0>5g, the ratio of dilution 10:1 ( V/V ). 99.60% of removing yield was obtained under optimum conditions.%经过两步反应合成了一种新型的磺酸盐型阴离子表面活性剂.应用红外光谱、元素分析等手段对中间体、最终产品进行了结构表征;应用电导法测定了自制的新型磺酸盐型阴离子表面活性剂cmc,运用两相滴定法测定了新型磺酸盐型阴离子表面活性剂的有效含量.接着,应用新型磺酸盐型阴离子表面活性剂构筑了一种新型的胶质液体泡沫(CLA)体系.实验发现,胶质液体泡沫(CLA)的粒径及稳定性主要受相比影响.利用电导率仪对胶质液体泡沫体系的稳定性进行初步研究.应用光学显微技术对胶质液体泡沫体系的结构进行了表征.最后,应用胶质液体泡沫体系进行含