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    Wyświetlanie 1-20 z 20
    Tytuł:
    Do combinations of insecticides and acaricides influence spray droplet formation and the interaction with citrus leaves?
    Autorzy:
    Della Vechia, J.F.
    Santos, R.T.
    Griesang, F.
    Santos, C.M.
    Ferriera, M.C.
    Andrade, D.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084816.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    contact angle
    coverage efficiency
    droplet size
    surface tension
    tank mixture
    Opis:
    In agriculture, the mixing of pesticides in tanks is a common practice. However, it is necessary to previse possible physical-chemical implications of this practice, which may affect the efficiency of the treatments performed. Therefore, the objective of this study was to evaluate the effects of the addition of acaricide to insecticidal spray mixtures on the formation of spray droplets and the interaction with citrus leaves. The experimental design was totally randomized, in a (2 × 3 + 1) factorial scheme for seven treatments. Factor A corresponded to the spray mixture used (isolate or in the mixture). Factor B corresponded to the insecticides tested (lambda-cyhalothrin + thiamethoxam, phosmet, and imidacloprid) and the control consisted of a spray mixture with spirodiclofen only. Nine replications were performed for characterization of the spray droplet size spectrum and four replications for the analysis of the surface tension and the contact angle. The mixture of pesticides showed positive results in terms of application safety. The addition of acaricide to insecticide spray mixtures reduced the surface tension and contact angle of droplets on the adaxial surface of orange leaves. There was an increment in volume median diameter (VMD), a significant reduction in the volume of droplets with drift-sensitive size and improvement in the uniformity of droplet size. Therefore, the addition of acaricide to an insecticide spray mixture positively influenced spray droplet formation and the interaction with citrus leaves providing better coverage and droplet size fractions with an appropriate size for safe and efficient application.
    Źródło:
    Journal of Plant Protection Research; 2019, 59, 4; 487-493
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dredging Volumes Prediction for the Access Channel of Santos Port Considering Different Design Depths
    Autorzy:
    Pion, L.M.
    Bernardino, J.C.M
    Powiązania:
    https://bibliotekanauki.pl/articles/116091.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Port of Santos
    dredging
    water level
    dredging volumes prediction
    Chart Datum (CD)
    water level modeling
    access channel
    prediction method
    Opis:
    Santos is the most important Brazilian port, handling about 114 million of tons in 2016. In 2010, there was a great capital dredging in order to deepen the Access Channel to 15m deep (Chart Datum - CD). This depth was not achieved, due to inefficiency on dredging procedures. As deepening and maintaining design depths are indispensable, this study presents an analysis of sediment deposition in Santos Port Access Channel and an annual dredging volumes prediction, considering current bathymetric survey and design depths of 15, 16 and 17 m (CD).A numerical hydrodynamic and morphological model was developed for the interest area, by using Delft3D®, calibrated with waves, currents and water level data measured within Santos Port adjacen-cies. Sediment transport model was calibrated with suspended sediment data and historic series of dredged volumes from Santos Port Access Channel. Two different scenarios were simulated for each design depth, according to the regional environmental characteristics. For current bathymetric scenario, the model estimates that it would be necessary to dredge an annual average of about 4,325,000 m³ from Santos Port access chan-nel to maintain current depth condition. Regarding design depths of 15, 16, 17 meters, it would be an in-crease of 15%, 55%, and 80%.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 505-514
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Alternative study for the Nautical and Shore Protection Structures in the Estuary of Santos, Brazil
    Autorzy:
    Alfredini, P.
    Arasaki, E.
    Bernardino, J.C.M
    Da Silva, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/116371.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    nautical protection structures
    shore protection
    estuary ofsantos
    Port of Santos
    Santos Port Outer Access Channel
    offshore bar
    hydraulic laboratory
    shoreline protection issues
    Opis:
    For the enlargement of the nautical dimensions of Santos Port Outer Access Channel (Brazil), training walls crossing the Offshore Bar are needed. The training walls choice to reduce dredging rates also induces to consider a coupling planning between nautical purposes and shore protection measures, as Santos Municipality have serious erosion problems nowadays due to the urban growth in the backshore and sea level rise. For decision support, the Hydraulic Laboratory of Engineering School of University of Sao Paulo was commissioned to study in a composite mathematical and scale model. Results include changes in wave height and direction and current speed analysis to conditions with training walls and segmented breakwaters. The water renewal was also analyzed to the condition with segmented breakwater and compared to current situation, based on hydrodynamics results and considering that this structure can reduce water quality in this area.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 2; 375-380
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Increasing photovoltaic panel power through water cooling technique
    Autorzy:
    Matias, C. A.
    Santos, L. M.
    Alves, A. J.
    Calixto, W. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/136175.pdf
    Data publikacji:
    2017
    Wydawca:
    EEEIC International Barbara Leonowicz Szabłowska
    Tematy:
    photovoltaic panel
    water cooling
    increasing electrical efficiency
    efficiency increase
    Opis:
    This paper presents the development of a cooling apparatus using water in a commercial photovoltaic panel in order to analyze the increased efficiency through decreased operating temperature. The system enables the application of reuse water flow, at ambient temperature, on the front surface of PV panel and is composed of an inclined plane support, a perforated aluminum profile and a water gutter. A luminaire was specially developed to simulate the solar radiation over the module under test in a closed room, free from the influence of external climatic conditions, to carry out the repetition of the experiment in controlled situations. The first case study was published at EEEIC2016 conference where the panel was submitted to different rates of water flow, from 1 L/min to 4 L/min. In the test conditions without cooling apparatus, the panel reached about 70°C and produced approximately 63Wh. With the cooling apparatus with water flow rate of 2 L/min, the module reached about 50°C and produced approximately 77Wh. However, it has been observed that this water flow was overestimated. A second case study was carried out in order to perform the threshold between the flow and the energy produced. The best ratio was flow of 0.6 L/min and net energy of 77.41Wh. Gain of 22.69% compared to the panel without the cooling system. The best water flow rate was of 0.6 L/min and net energy of 77.41Wh. Gain of 22.69% compared to the panel without the cooling system.
    Źródło:
    Transactions on Environment and Electrical Engineering; 2017, 2, 1; 60-66
    2450-5730
    Pojawia się w:
    Transactions on Environment and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamics of Polariton Emission in the Linear Regime
    Autorzy:
    Kłopotowski, Ł.
    Santos, R.
    Amo, A.
    Martín, M. D.
    Viña, L.
    André, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2038373.pdf
    Data publikacji:
    2004-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.36.+c
    71.55.Gs
    78.47.+p
    Opis:
    We studied the dependence of polariton emission dynamics on polariton wave-vector and exciton-photon energy detuning. To reproduce the experimental data, we applied a model that obtains the photonic and the excitonic emission rates of the polariton.
    Źródło:
    Acta Physica Polonica A; 2004, 106, 3; 443-450
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eddy Current System for Complex Geometry Inspection in High Speed Application
    System wiroprądowy do kompleksowej kontroli geometrii w zastosowaniach z dużą prędkością
    Autorzy:
    Camerini, C.
    Rebello, J. M. A.
    Braga, L.
    Santos, R.
    Santos, J. M.
    Pereira, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/107878.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    fatigue crack
    weld root
    eddy current testing
    in-line inspection tool
    pęknięcie zmęczeniowe
    rdzeń spawu
    testowanie wiroprądowe
    jednostka kontroli inline
    Opis:
    Rigid pipelines installed in offshore structures for oil and gas production are built from pipe sections connected by circumferential welds. Such welds are generally points of stress concentration and therefore the regions that most demand periodic inspection. The weld geometry and the inspection speed required for in service inspection are the main challenges associated to the inspection procedure. In the present work an eddy current transducer with sensing coils placed orthogonally and connected in differential mode was introduced to evaluate fatigue cracks in weld root. A dedicated embedded electronic hardware was developed to drive the transducer and measure the electrical complex impedance of the coils and was specifically designed for operation under autonomous in-line inspection tool in a speed range between 0.5 – 1.0 m/s. The achieved results have confirmed that the introduced eddy current transducer is a potential solution for fatigue crack detection in irregular surfaces like weld root, while the hardware developed presented a reasonable SNR and achieved the data rate required to be incorporated in an autonomous in-line inspection tool.
    Sztywne rurociągi instalowane w morskich konstrukcjach do produkcji ropy i gazu budowane są z odcinków rur połączonych spoinami obwodowymi. Takie spoiny są zwykle punktami koncentracji naprężeń, a zatem regionami, które w największym stopniu wymagają okresowej kontroli. Geometria spoiny i prędkość kontroli wymagana do przeprowadzenia badania serwisowego stanowią główne wyzwania związane z procedurą inspekcji. W niniejszej pracy, w celu oceny pęknięć zmęczeniowych w rdzeniu spoiny, zaproponowano przetwornik wiroprądowy z cewkami pomiarowymi umieszczonymi ortogonalnie i połączonymi różnicowo. Opracowano specjalny wbudowany system elektroniczny do sterowania przetwornikiem i pomiaru impedancji złożonych cewek elektrycznych. System został zaprojektowany specjalnie do pracy jako autonomiczna jednostka inspekcji linii w zakresie prędkości od 0,5 do 1,0 m/s. Uzyskane wyniki potwierdziły, że wprowadzony przetwornik wiroprądowy jest potencjalnym rozwiązaniem umożliwiającym wykrywania pęknięć zmęczeniowych na nieregularnych powierzchniach, takich jak rdzeń spoiny. Ponadto opracowany sprzęt zapewnia odpowiedni współczynnik stosunku sygnału do szumu SNR i osiąga prędkość transmisji wymaganą dla zastosowania w jednostkach niezależnej kontroli w linii.
    Źródło:
    Badania Nieniszczące i Diagnostyka; 2018, 2; 6-10
    2451-4462
    2543-7755
    Pojawia się w:
    Badania Nieniszczące i Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tracking Late Jurassic ornithopods in the Lusitanian Basin of Portugal: Ichnotaxonomic implications
    Autorzy:
    Castanera, D.
    Silva, B.C.
    Santos, V.F.
    Malafaia, E.
    Belvedere, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082160.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Iguanodontipodidae
    Dinehichnus
    Anomoepus-like
    Kimmeridgian
    Tithonian
    Europe
    Opis:
    The Sociedade de História Natural in Torres Vedras, Portugal houses an extensive collection of as yet undescribed dinosaur tracks with ornithopod affinities. They have been collected from different Late Jurassic (Kimmeridgian–Tithonian) geological formations (Praia de Amoreira-Porto Novo, Alcobaça, Sobral, and Freixial) that outcrop along the Portuguese coast, and belong to two different sub-basins of the Lusitanian Basin (the Consolação and Turcifal sub-basins). Three main morphotypes can be distinguished on the basis of size, mesaxony and the morphology of the metatarsophalangeal pad impression. The minute to small-sized morphotype is similar to the Anomoepus-like tracks identified in other Late Jurassic areas. The small to medium-sized morphotype resembles the Late Jurassic–Early Cretaceous ichnotaxon Dinehichnus, already known in the Lusitanian Basin. Interestingly, these two morphotypes can be distinguished qualitatively (slightly different size, metatarsophalangeal pad impression and digit morphology) but are nevertheless difficult to discriminate by quantitatively analysing their length-width ratio and mesaxony. The third morphotype is considered a large ornithopod footprint belonging to the ichnofamily Iguanodontipodidae. This ichnofamily is typical for Cretaceous tracksites but the new material suggests that it might also be present in the Late Jurassic. The three morphotypes show a negative correlation between size and mesaxony, so the smaller tracks show the stronger mesaxony, and the larger ones weaker mesaxony. The Upper Jurassic ornithopod record from the Lusitanian Basin has yielded both small and medium-sized ornithopod remains, mainly iguanodontians such as dryosaurids and ankylopollexians, which are the main candidates to be the trackmakers.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 2; 399-412
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of kaolin and Bordeaux mixture in Vitis vinifera under water stress conditions: oxidative stress
    Autorzy:
    Dias, M.
    Jesus, C.
    Pinto, G.
    Santos, C.
    Goncalves, B.
    Goncalves, D.
    Malheiro, A.
    Correia, C.
    Moutinho-Pereira, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/80420.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    kaolin
    Bordeaux mixture
    Vitis vinifera
    water stress
    oxidative stress
    grape-vine
    plant stress
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First record of mites associated with lima bean (Phaseolus lunatus L.)
    Autorzy:
    Neto, A.V.G.
    Silva, P.R.R.
    Silva, J.D.C.
    Dos Santos, M.F.
    Da Silva Melo, J.W.
    De Franca, S.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084632.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Tetranychidae
    pest mites
    legumes
    Opis:
    Pest mites of the family Tetranychidae are commonly reported in several legumes. However, reports of their occurrence in lima beans are insipient, especially in Brazil. The objective of this research was to record the occurrence of mites in lima bean plants and to describe their damage in this Fabaceae. Tetranychus neocaledonicus André and Mononychellus planki McGregor were found in lima bean plants, Phaseolus lunatus (Fabaceae or Leguminosae). The lima bean plants, when infested by these mites, initially exhibit small whitish spots in the leaflets, which with increasing population density rapidly evolve into chlorotic patches, followed by silvering, and may dry out and fall due to their overfeeding. The extent of the damage caused to lima bean plants and the adaptability of the mite to warm and dry conditions indicate that T. neocaledonicus has greater potential as a lima bean pest than M. planki in northeastern Brazil. This is the first record of these mites associated with P. lunatus.
    Źródło:
    Journal of Plant Protection Research; 2019, 59, 3; 418-422
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oxidative stress and antioxidant responses in olive tree subjected to cover crops under rainfed conditions
    Autorzy:
    Correia, C.
    Brito, C.
    Santos, D.
    Bacelar, E.
    Goncalves, B.
    Ferreira, H.
    Moutinho-Pereira, J.
    Rodrigues, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/80569.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    oxidative stress
    antioxidative response
    olive tree
    cover crop
    rainfed condition
    reactive oxygen species
    oxidative damage
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-dimensional kinematic adaptations of gait throughout pregnancy and post-partum
    Autorzy:
    Branco, M. A. C.
    Santos-Rocha, R.
    Vieira, F.
    Aguiar, R.
    Veloso, A. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/307113.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ciąża
    biomechanika
    kinematyka
    własności temporalne
    chód
    pregnancy
    biomechanics
    joint kinematics
    temporal parameters
    gait
    Opis:
    Purpose: The kinematic analysis of gait during pregnancy provides more information about the anatomical changes and contributes to exercise and rehabilitation prescription. The purposes were to describe and quantify the spatial, temporal and kinematic parameters in the joints of the lower limb during gait at the end of the first, second and third trimesters of pregnancy and in the postpartum period. Methods: A three-dimensional analysis was performed in eleven pregnant women. Repeated measures ANOVA was performed for comparisons between periods. Results: The longitudinal effect of pregnancy was not observed in spatial and temporal parameters. In joint kinematics the effect of pregnancy was observed in all joints for the three planes of motion. The hip joint and pelvis are the structures with more changes, and the results point to an increase in the anterior tilt of the pelvis as the pregnancy progresses, as well as a decrease of the amplitudes of the hip joint. The results suggested that pregnant women need to maintain the stability of the body, and become more efficient in locomotion. Conclusions: In general, the results retrieve the values from the beginning of pregnancy, indicating that the body was self-organized in order to overcome the morphological and physiological changes which women suffer during pregnancy, indicating that they have the ability to adapt depending on the demands, and after the effect of pregnancy is over, they return to values similar to those found in early pregnancy
    Źródło:
    Acta of Bioengineering and Biomechanics; 2016, 18, 2; 153-162
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative study on the performance of radiation detectors from the HgI2 crystals grown by different techniques
    Autorzy:
    Martins, J. F. T.
    Costa, F. E.
    dos Santos, R. A.
    de Mesquita, C. H.
    Hamada, M. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/146916.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    crystal growth
    iodide mercury crystal
    physical vapor transport (PVT)
    radiation detector
    semiconductor crystal
    Opis:
    In this work, the establishment of a technology for HgI2 purification and crystal growth is described, aiming at a future application of this crystal as a room temperature radiation semiconductor detector. Two methods of crystal growth were studied in the development of this work: (1) physical vapor transport (PVT) and (2) saturated solution from dimethylsulphoxide (DMSO) complexes. In order to evaluate the crystals obtained using each of these methods, systematic measurements were carried out for determining the stoichiometry, structure, orientation, surface morphology and impurity of the crystal. The influence of these physicochemical properties of the crystals developed was evaluated in terms of their performance as a radiation detector. The best response to radiation was found for the crystals grown by the PVT technique. Significant improvement in the performance of HgI2 radiation detector was found, purifying the crystal by means of two successive growths by the PVT technique.
    Źródło:
    Nukleonika; 2012, 57, 4; 555-562
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Involvement of carbohydrates and antioxidant enzymes in the oxidative balance during drought and recovery: the eucalyptus case
    Autorzy:
    Correia, B.
    Silva, S.
    Jesus, C.
    Valledor, L.
    Dias, M.
    Costa, A.
    Santos, C.
    Pinto, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/79853.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    carbohydrate
    antioxidative enzyme
    oxidative balance
    drought
    recovery
    cellular function
    abiotic stress
    reactive oxygen species
    eucalyptus
    Eucalyptus globulus
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Granularity on the Transversal Resistance in Y_{0.55}Pr_{0.45}Ba_2Cu_3O_{7-δ} Superconductor
    Autorzy:
    da Luz, M.
    dos Santos, C.
    Machado, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399293.pdf
    Data publikacji:
    2013-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.-q
    74.25.Fy
    74.81.Bd
    Opis:
    This work reports longitudinal $(R_{XX})$ and transverse $(R_{XY})$ resistance as a function of temperature measured at low magnetic fields for $Y_{0.55}Pr_{0.45}Ba_2Cu_3O_{7-δ}$ polycrystalline sample. It is observed non-zero transverse resistance at zero applied magnetic field below superconducting transition. The comparison between $R_{XX} (T)$ and $R_{XY} (T)$ curves demonstrate unambiguously that the transverse resistance is related to the double resistive superconducting transition in granular superconductors. I-V curves indicate that the transport properties of the investigated sample are in agreement with the predictions of the two-fluid model.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 4; 702-705
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis and glycosyl composition of the exopolysaccharide isolated from submerged fermentation of Ganoderma lucidum CG144
    Autorzy:
    Rubel, R.
    Freire dos Santos, L.
    Stutz Dalla Santa, H.
    Porto de Souza Vandenberghe, L.
    Wojciechowski, A.L.
    de Carvalho, J.C.
    Habu, S.
    Destefanis Vitola, F.M.
    Augur, C.
    Soccol, C.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/56735.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    glycosyl composition
    exopolysaccharide
    isolation
    submerged fermentation
    Ganoderma lucidum
    heteroglycan
    herbal medicine
    Chinese medicine
    Opis:
    The evaluation of glycosyl composition is an essential step to guide future research designs applied in bioactivity. In the same way, the unexplored potential bioactivity of exopolysaccharide from Ganoderma lucidum is huge. Therefore, this study investigated the glycosyl composition of the exopolysaccharide isolated from submerged fermentation of G. lucidum to serve as guide for future studies on bioactivity. Glycosyl content and composition were evaluated by combined GC/ MS of the TMS derivatives of the monosaccharide methyl glycosides produced from the sample by acidic methanolysis. Glycosyl composition analysis showed that the dominant carbohydrate component in all samples of exopolysaccharide isolated from submerged fermentation of G. lucidum CG 144 was glucose (58.1%), mannose (26.6%) and galactose (12.5%) which can be referred to as heteroglycan. These results suggest that this Ganoderma exopolysaccharide may be a new immunomodulatory agent.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical study of Hough technique in surgery of otosclerosis, using the finite element method
    Autorzy:
    Gentil, F.
    Parente, M.
    Martins, P.
    Santos, C.
    Almeida, E.
    Ferreira, A.
    Natali, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/307201.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    metoda elementów skończonych
    otoskleroza
    wycięcie strzemiączka
    strzemiączko
    finite element method
    otosclerosis
    stapedectomy
    stapedotomy
    stapes
    Opis:
    Purpose: Otosclerosis is a metabolic bone disease of the otic capsule that can cause the stapes fixation, resulting in conductive hearing loss or, in a profound sensorineural deafness threshold. Surgery is one of the possible treatments for the otosclerosis. To repair small focus of otosclerosis in the anterior crus of the stapes, in 1960, Hough suggested the implementation of a technique in which part of the anterior crus is fractured and the stapes turned. As a result, the posterior crus of the stapes is the only connection with the inner ear. In this work, the outcome of Hough’s surgical technique was simulated. Methods: Based on computerized images, a finite element model of middle ear ossicles and tympanic membrane was created, as well as a model where the stapes has changed. The discretization of the tridimensional solid model was made using the ABAQUS software. The mechanical properties used were taken from the literature and adequate boundary conditions were applied. Results: The results obtained with the Hough technique simulation were compared with a representative model of the normal ear, taking into account the displacements obtained on the central part of the stapes footplate and the maximum principal stress in the stapes crus. Conclusions: The results obtained are closer to the normal ear model, therefore Hough technique stands out as a good option to correct small focus of otosclerosis.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 4; 149-153
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An alternative 3D numerical method to study the biomechanical behaviour of the human inner ear semicircular canal
    Autorzy:
    Santos, C. F.
    Belinha, J.
    Gentil, F.
    Parente, M.
    Jorge, R. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/951835.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    biomechanika
    FEM
    mechanika płynów
    narząd przedsionkowy
    ucho wewnętrzne
    vertigo
    biomechanics
    finite element method
    human vestibular system
    fluid mechanics
    inner ear
    Opis:
    Purpose: The vestibular system is the part of the inner ear responsible for balance. Vertigo and dizziness are generally caused by vestibular disorders and are very common symptoms in people over 60 years old. One of the most efficient treatments at the moment is vestibular rehabilitation, permitting to improve the symptoms. However, this rehabilitation therapy is a highly empirical process, which needs to be enhanced and better understood. Methods: This work studies the vestibular system using an alternative computational approach. Thus, part of the vestibular system is simulated with a three dimensional numerical model. Then, for the first time using a combination of two discretization techniques (the finite element method and the smoothed particle hydrodynamics method), it is possible to simulate the transient behavior of the fluid inside one of the canals of the vestibular system. Results: The obtained numerical results are presented and compared with the available literature. The fluid/solid interaction in the model occurs as expected with the methods applied. The results obtained with the semicircular canal model, with the same boundary conditions, are similar to the solutions obtained by other authors. Conclusions: The numerical technique presented here represents a step forward in the biomechanical study of the vestibular system, which in the future will allow the existing rehabilitation techniques to be improved.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 1; 3-15
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of a particle swarm optimization to a physically-based erosion model
    Zastosowanie optymalizacji zbioru rozproszonych czasteczek do modelu erozji opartego na podstawach fizycznych
    Autorzy:
    Santos, C A G
    Pinto, L.E.M.
    De Macedo Machado Freire, P.K.
    Mishra, S.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/81761.pdf
    Data publikacji:
    2010
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    particle swarm optimization
    application
    erosion model
    erosion simulation
    run-off
    optimization
    erosion parameter
    Opis:
    The difficulties involved in calibration of physically based erosion models have been partly attributable to the lack of robust optimization tools. This paper presents the essential concepts and application to optimize channel and plane parameters in an erosion model, with a global optimization method known as Repulsive Particle Swarm (RPS), a variant of Particle Swarm Optimization (PSO) method. The physically-based erosion model that which was chosen is called WESP (watershed erosion simulation program). The optimization technique was tested with the field data collected in an experimental watershed located in a semi-arid region of Brazil. On the basis of these results, the recommended erosion parameter values for a semi-arid region are given, which could serve as an initial estimate for other similar areas.
    Trudności w kalibracji modeli erozji opartych na podstawach fizycznych przyczyniły się do braku ogólnych narzędzi optymalizacji. W pracy przedstawiono podstawowe koncepcje i zastosowanie do zoptymalizowania parametrów kanału i płaszczyzny w modelu erozji, globalną metodą optymalizacji znaną jako Repulsive Particle Swarm (RPS), wariantem metody Particle Swarm Optimisation (SPO). Fizycznie uzasadniony model erozji, który został wybrany jest nazywany WESP (watershed erosion simulation program). Technika optymalizacji została wypróbowana na danych terenowych zebranych w zlewni eksperymentalnej zlokalizowanej w umiarkowanie suchym regionie Brazylii. Na podstawie tych wyników przedstawiono wartości rekomendowanego parametru erozji dla umiarkowanie suchego regionu, który może służyć jako początkowe oszacowanie dla podobnych obszarów.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 39-49
    0208-5771
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial analysis of vegetal cover and sediment yield in Tapacura river catchment based on remote sensing and GIS
    Analiza przestrzenna ilosci sedymentu oraz pokrywy roslinnej w zlewni rzeki Tapacura okreslona na podstawie zdalnych obserwacji oraz analizy GIS
    Autorzy:
    Silva, R M
    Santos, C.A.G.
    Gico Lima Montenegro, S.M.
    Silva, L.P.
    Powiązania:
    https://bibliotekanauki.pl/articles/81843.pdf
    Data publikacji:
    2010
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    spatial analysis
    vegetation cover
    sediment yield
    Tapacura River
    catchment
    remote sensing
    GIS analysis
    Opis:
    Mapping and assessment of erosion risk is an important tool for planning of natural resources management, allowing researchers to propose modifi cation in land-use properly and implement more sustainable management strategies in the long-term. The Tapacurá river catchment, located in Pernambuco State, Northeastern Brazil, is one of the planning units for management of water resources of Recife Metropilitan Region (RMR), and it is divided into 12 sub-basins. The objective of this study is to evaluate the spatial variability of vegetal cover and sediment yield in this basin through remote sensing and GIS techniques. Maps of the erosivity (R), erodibility (K), topographic (LS), cover-management (C) and support practice (P) factors were derived from the digital elevation model (DEM), climate database, and soil and NDVI maps, taking into account information available in the literature. In order to validate the simulation process, Sediment Delivery Ratio (SDR) was estimated. The obtained NDVI map showed vegetation loss during the analyzed period, indicating a distinct contrast between loss and gains of vegetation index. The vegetation and sediment yield mapping showed to be a useful tool for environmental monitoring and management, which can provide satisfactory results when jointly used. The results suggest a mean SDR around 0.9 and estimate the sediment yield as 23.98 ton/ha/month.
    Analiza przestrzenna ilości sedymentu oraz pokrywy roślinnej w zlewni rzeki Tapacura określona na podstawie zdalnych obserwacji oraz analizy GIS. Artykuł przedstawia sposób wykorzystania zebranych w terenie danych dotyczących pokrywy roślinnej oraz ilości sedymentu określonego za pomocą zdalnych obserwacji oraz analizy GIS w celu monitorowania środowiska i zarządzania zlewniami. W pracy wykorzystano metodę USLE-SDR, a także cyfrowy model terenu. Badania prowadzono w zlewni rzeki Tapacura w północno-wschodniej Brazylii. Wyniki sugerują przyjęcie wartości parametru SDR = 0,9, a oszacowana wielkość transportu rumowiska wynosi 23,98 t/ha/miesiąc.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 5-16
    0208-5771
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Building on the concept of marine biological valuation with respect to translating it to a practical protocol: Viewpoints derived from a joint ENCORA-MARBEF initiative
    Autorzy:
    Derous, S.
    Austen, M.
    Claus, S.
    Daan, N.
    Dauvin, J.-C.
    Deneudt, K.
    Depestele, J.
    Desroy, N.
    Heessen, H.
    Hostens, K.
    Marboe, A.H.
    Lescrauwaet, A.-K.
    Moreno, M.P.
    Moulaert, I.
    Paelinckx, D.
    Rabaut, M.
    Rees, H.
    Ressurreicao, A.
    Roff, J.
    Santos, P.T.
    Speybroeck, J.
    Stienen, E.W.M.
    Tatarek, A.
    Hofstede, R.T.
    Vincx, M.
    Zarzycki, T.
    Degraer, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/48603.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    marine biological valuation
    ecological criterion
    marine biodiversity
    intrinsic value
    ENCORA-MARBEF concept
    Opis:
    Marine biological valuation provides a comprehensive concept for assessing the intrinsic value of subzones within a study area. This paper gives an update on the concept of marine biological valuation as described by Derous et al. (2007). This concept was based on a literature review of existing ecological valuation criteria and the consensus reached by a discussion group of experts during an international workshop in December 2004. The concept was discussed during an ENCORA –MARBEF workshop in December 2006, which resulted in the fine-tuning of the concept of marine biological valuation, especially with respect to its applicability to marine areas.
    Źródło:
    Oceanologia; 2007, 49, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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