Resultados de búsqueda - "optics"

Effect of seminal plasma on hipoosmotic swelling test in fresh alpaca spermatozoa por Pacheco Curie, Joel I., Mamani Cato, Rubén Herberht, Vélez, V. M.

“…A count of at least 200 spermatozoa was performed per sample, using an optical microscope with immersion objective (100X), the vitality was evaluated by supravital eosin staining (0.7%)-nigrosin(1%), the results indicate that it does not exist a detrimental effect of the seminal plasma on the endosmotic response, being, on the contrary, superior in the whole semen; the vitality of the spermatozoa with and without seminal plasma is similar, however it decreases when it is reconstituted with seminal plasma, possibly due to the seminal plasma of another animal; there is no positive correlation between endosmosis and vitality, indicating that the latter would not necessarily reflect the integrity of the membrane, which is why it is recommended to perform this test routinely in alpaca semen exams.…”
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Development and field evaluation of an ELISA to differentiate Anaplasma marginale–infected from A. centrale–vaccinated cattle por Bellezze, Julio, Thompson, Carolina Soledad, Bosio, Anabela, Torioni, Susana Marta, Primo, María Evangelina

“…Species-specific nested PCR (nPCR) assays were used to confirm infection. The optical density (OD) values obtained from antibodies directed at unique epitopes of A. marginale (ODAm) or A. centrale (ODAc) were used in the formula ODAm/ODAc. …”
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Development and diagnostic validation of an ELISA based on an antigenic mixture for the detection of bovine tuberculosis por Griffa, Natanael, Moyano, Roberto Damián, Canal, Ana María, Traveria, Gabriel Eduardo, Santangelo, María De La Paz, Alonso, Maria Natalia, Romano, Maria Isabel

“…According to ROC curve analysis of results of 145 cattle from M. bovis-free herds and the 36 M. bovis-infected cattle, at a corrected optical density cut-off point of 0.3853, specificity was 95.95% and the positive predictive value at this cut-off was 83.72%. …”
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Comparison of UAV and SAR performance for crop type classification using machine learning algorithms: a case study of humid forest ecology experimental research site of west Africa por Duke, O.P., Alabi, T.R., Neeti, N., Adewopo, Julius

“…A synergistic approach comprising a high-resolution multispectral UAV optical dataset and synthetic aperture radar (SAR) can help understand spectral features of target objects, especially with crop type identification. …”
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Characterization of macro and micro-minerals in cassava leaves from genotypes planted in three different agroecological locations in Nigeria por Alamu, Emmanuel Oladeji, Dixon, A., Eyinla, T., Maziya-Dixon, Busie

“…Laboratory analysis of the leaves was done using an Inductively Coupled Optical Emission Spectrometer. Across all three locations sampled in this study, the iron content ranged from 43 to 660 mg/kg, zinc from 16 to 440 mg/kg, Manganese 16–61mg/kg, Copper 0.7–14 mg/kg, Aluminum 5.3–630 mg/kg. …”
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Automatization and evaluation of a remote sensing-based indicator for wetland health assessment in East Africa on national and local scales por Steinbach, S., Hentschel, E., Hentze, K., Rienow, A., Umulisa, V., Zwart, Sander J., Nelson, A.

“…The Wetland Use Intensity (WUI) indicator, which is not specific to a particular crop and which requires little ancillary data, is based on the Mean Absolute Spectral Dynamics (MASD), which is a cumulative measure of reflectance change across a time series of optical satellite images. It is sensitive to the compound effects of land cover changes caused by different agricultural practices, flooding or burning. …”
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Low-cost sensors and multitemporal remote sensing for operational turbidity monitoring in an East African wetland environment por Steinbach, S., Rienow, A., Chege, M. W., Dedring, N., Kipkemboi, W., Thiong’o, B. K., Zwart, Sander J., Nelson, A.

“…The availability of high spatial resolution satellite images from the Sentinel-2 multispectral instrument and of bio-optical models, such as the Case 2 Regional CoastColor (C2RCC) processor, has fostered turbidity modeling. …”
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Assessing the accuracy of multi-model approaches for downscaling land surface temperature across diverse agroclimatic zones por Roy, Debasish, Das, Bappa, Singh, Pooja, Santra, Priyabrata, Deb, Shovik, Bhattacharya, Bimal Kumar, Govind, Ajit, Jatav, Raghuveer, Sethi, Deepak, Ghosh, Tridiv, Mukherjee, Joydeep, Sehgal, Vinay Kumar, Prakash Kumar Jha, Goroshi, Sheshakumar, Prasad, P. V. Vara, Chakraborty, Debashis

“…In the current article, we compared three different models, namely 1) Thermal Sharpening (TsHARP), 2) Thin Plate Spline (TPS), and 3) Random Forest (RF) for downscaling LST from 100 to 10 m by using high-resolution Sentinel-1,2 optical-microwave data. TsHARP, TPS, and RF are commonly used methods for improving the spatial resolution of large-scale environmental or climate data to finer scales for field-level applications. …”
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Assessing the accuracy of multi-model approaches for downscaling land surface temperature across diverse agroclimatic zones por Roy, Debasish, Das, Bappa, Singh, Pooja, Santra, Priyabrata, Deb, Shovik, Kumar Bhattacharya, Bimal, Govind, Ajit, Jatav, Raghuveer, Sethi, Deepak, Ghosh, Tridiv, Mukherjee, Joydeep, Kumar Sehgal, Vinay, Kumar Jha, Prakash, Goroshi, Sheshakumar, Vara Prasad, V. P., Chakraborty, Debashis

“…In the current article, we compared three different models, namely 1) Thermal Sharpening (TsHARP), 2) Thin Plate Spline (TPS), and 3) Random Forest (RF) for downscaling LST from 100 to 10 m by using high-resolution Sentinel-1,2 optical-microwave data. TsHARP, TPS, and RF are commonly used methods for improving the spatial resolution of large-scale environmental or climate data to finer scales for field-level applications. …”
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Relations of carbon isotope discrimination and other physiological traits to yield in common bean (Phaseolus vulgaris) under rainfed conditions por White, Jeffrey W., Castillo Franco, J.A., Ehleringer, JR, García, J.A., Singh, Shree P.

“…Significant (P 0·05) differences among parents, F2 and F3 were found for carbon isotope discrimination (?), leaf optical density (OD), leaf nitrogen (N) and potassium (K) concentrations, relative duration of pod-filling period (RDPF), shoot dry weight (SDW) and harvest index (HI). …”
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Rapid emergency response mapping for the 2016 floods in Kelani river basin, Sri Lanka por Alahacoon, Niranga, Pani, Peejush, Matheswaran, Karthikeyan, Samansiri, Srimal, Amarnath, Giriraj

“…A total of 13 satellite images both microwave and optical datasets (ALOS-2, Sentinel-1, RISAT-1, RADARSAT-2, TerraSAR-X, FORMOSAT, Landsat-8) were provided by various space agencies to generate flood situation maps on a daily basis. …”
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QTL analysis of citrus tristeza virus-citradia interaction por Asins, María J., Bernet, Guillermo P., Ruiz, C., Cambra, Mariano, Guerri, José, Carbonell, Emilio A.

“…Additionally, CTV multiplication was evaluated every year as the optical density of double-antibody sandwich enzyme-linked immuno-sorbent assay reactions. …”
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Effect of recombinant gonadotropins on embryo quality in superovulated rabbit does and immune response after repeated treatments por Viudes-De-Castro, María P., Cortell, Carmela, Mocé, Eva, Marco-Jiménez, Francisco, Joly, Thierry, Vicente, José Salvador

“…The hormone administration had a significant effect on immune response in the superovulation group after two treatments (0.14 +/- 0.074 and 0.15 +/- 0.076 vs. 0.46 +/- 0.078 and 0.50 +/- 0.078 optical density for the first, second, third, and forth cycles, respectively). …”
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Machine vision for precise control of weeds por Blasco, José, Benlloch, J. V., Agustí, Manuel, Moltó, Enrique

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Spectroscopy and swelling soils: An integrated approach por Kariuki, P.C.

“…Manipulations of the spectral curves in the form of first and second derivatives were also observed to give similar information whereas other manipula tions such as the optical density and the band normalised with centre were not as pr omising. …”
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Direct and indirect estimations of aerial forage net primary productivity in Nothofagus antarctica forests under silvopastoral systems in northwest of Chubut, Argentina por Martinez, María Natalia, Cuerda Marcocig, Florencia Maria del Rocio, Gomez, Federico Antonio, Mondino, Victor Alejandro, Tejera, Eduardo, Tarabini, Manuela Mabel, Bava, José Omar, Von Müller, Axel

“…It was possible to indirectly estimate understory ANPP under thinned ñire forest using optical remote sensing. The results of this study offer a valuable remote sensing decision making tool for stakeholders, enabling insights to be scaled up to broader territory and aiding in adjusting agroforestry systems’ livestock carrying capacity. …”
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Canopy indices to quantify the economic optimum nitrogen rate in processing potato por Giletto, Claudia Marcela, Echeverria, Hernan Eduardo

“…The canopy chlorophyll indices performed better than the canopy biomass indices in measuring N stress. The optical sensor CC was better than the GS in predicting N stress because it measures the RNDVI and the RCI in a single reading.…”
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Two new species of the family Nippobodidae (Acari, Oribatida), including a description of the leg-folding process por Fernandez, Nestor, Theron, Pieter Daniel, Leiva, Sergio Dante

“…Nippobodes panemorfis sp. n. and Leobodes trypasis sp. n. are described by means of optical and Scanning Electron Microscopy (SEM) and compared to other congeners. …”
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The use of a two-dimensional electrical resistivity tomography (2D-ERT) as a technique for cadmium determination in cacao crop soils por Bravo, Daniel, Benavides Erazo, Javier

“…Cd hot spots are estimated from resistivity measurements using a two-dimensional electrical resistivity tomography (2D-ERT) technique and correlated to Cd determination using inductively coupled plasma optical emission spectrometry (ICP-OES). To assess the dynamics of soil Cd content the correlation is discussed with other physical chemical parameters of soils (pH, organic matter, Ca, Fe, and P). …”
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The Use of a Two-Dimensional Electrical Resistivity Tomography (2D-ERT) as a Technique for Cadmium Determination in Cacao Crop Soils por Bravo, Daniel, Benavides Erazo, Javier

“…Cd hot spots are estimated from resistivity measurements using a two-dimensional electrical resistivity tomography (2D-ERT) technique and correlated to Cd determination using inductively coupled plasma optical emission spectrometry (ICP-OES). To assess the dynamics of soil Cd content the correlation is discussed with other physical chemical parameters of soils (pH, organic matter, Ca, Fe, and P). …”
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