Relevant bibliographies by topics / Colorimetric approaches

Academic literature on the topic 'Colorimetric approaches'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Colorimetric approaches"

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Majdinasab, Marjan, Sondes Ben Aissa, and Jean Louis Marty. "Advances in Colorimetric Strategies for Mycotoxins Detection: Toward Rapid Industrial Monitoring." Toxins 13, no. 1 (December 24, 2020): 13. http://dx.doi.org/10.3390/toxins13010013.

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Mycotoxins contamination is a global public health concern. Therefore, highly sensitive and selective techniques are needed for their on-site monitoring. Several approaches are conceivable for mycotoxins analysis, among which colorimetric methods are the most attractive for commercialization purposes thanks to their visual read-out, easy operation, cost-effectiveness, and rapid response. This review covers the latest achievements in the last five years for the development of colorimetric methods specific to mycotoxins analysis, with a particular emphasis on their potential for large-scale applications in food industries. Gathering all types of (bio)receptors, main colorimetric methods are critically discussed, including enzyme-linked assays, lateral flow-assays, microfluidic devices, and homogenous in-solution strategies. This special focus on colorimetry as a versatile transduction method for mycotoxins analysis is comprehensively reviewed for the first time.
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Xu, Xiaohan, Yu-Feng Li, Jiating Zhao, Yunyun Li, Jing Lin, Bai Li, Yuxi Gao, and Chunying Chen. "Nanomaterial-based approaches for the detection and speciation of mercury." Analyst 140, no. 23 (2015): 7841–53. http://dx.doi.org/10.1039/c5an01519g.

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Savvin, Sergey B., Vladimir V. Kuznetsov, Yulia V. Ermolenko, Irina Yu Chernikova, and Alla V. Mikhailova. "Green approaches to colorimetric monitoring of calcium in water." Pure and Applied Chemistry 81, no. 11 (October 26, 2009): 2123–29. http://dx.doi.org/10.1351/pac-con-08-10-05.

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Simple, ecologically harmless chemical reactions have always been a point of interest for chemists and analysts as fit to be applied to work in or out of laboratories. A new concept of chemical analysis is exemplified in the article by means of selective determination of calcium ions with the organic reagent arsenazo III (2,2'-[1,8-dihydroxy-3,6-disulfonaphthylene-2,7-bisazo]-bisbenzenearsonic acid disodium salt) with no application of toxic solvents during the seasonal analysis of water in the Yauza River (the city of Moscow).
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Dzantiev, B. B. "APPROACHES FOR IMPROVING SENSITIVITY OF RAPID IMMUNOCHROMATOGRAPHIC TEST SYSTEMS." http://eng.biomos.ru/conference/articles.htm 1, no. 19 (2021): 229–31. http://dx.doi.org/10.37747/2312-640x-2021-19-229-231.

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Various nanodispersed markers and their combinations for immunochromatography with colorimetric and fluorimetric detection are considered and their opportunities for lowering the detection limit are characterized. The influence of the composition of antibody-nanomarker conjugates on analytical parameters of the test systems is described.
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Balusamy, Brabu, Anitha Senthamizhan, and Tamer Uyar. "Functionalized Electrospun Nanofibers as a Versatile Platform for Colorimetric Detection of Heavy Metal Ions in Water: A Review." Materials 13, no. 10 (May 25, 2020): 2421. http://dx.doi.org/10.3390/ma13102421.

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The increasing heavy metal pollution in the aquatic ecosystem mainly driven by industrial activities has raised severe concerns over human and environmental health that apparently necessitate the design and development of ideal strategies for the effective monitoring of heavy metals. In this regard, colorimetric detection provides excellent opportunities for the easy monitoring of heavy metal ions, and especially, corresponding solid-state sensors enable potential opportunities for their applicability in real-world monitoring. As a result of the significant interest originating from their simplicity, exceptional characteristics, and applicability, the electrospun nanofiber-based colorimetric detection of heavy metal ions has undergone radical developments in the recent decade. This review illustrates the range of various approaches and functional molecules employed in the fabrication of electrospun nanofibers intended for the colorimetric detection of various metal ions in water. We highlight relevant investigations on the fabrication of functionalized electrospun nanofibers encompassing different approaches and functional molecules along with their sensing performance. Furthermore, we discuss upcoming prospectus and future opportunities in the exploration of designing electrospun nanofiber-based colorimetric sensors for real-world applications.
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Gummadi, Sowjanya, and Mohana Kommoju. "Colorimetric Approaches To Drug Analysis And Applications – A Review." American Journal of PharmTech Research 9, no. 1 (February 8, 2019): 14–37. http://dx.doi.org/10.46624/ajptr.2019.v9.i1.002.

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Fernandes, Gabriel Martins, Weida R. Silva, Diandra Nunes Barreto, Rafaela S. Lamarca, Paulo Clairmont F. Lima Gomes, João Flávio da S Petruci, and Alex D. Batista. "Novel approaches for colorimetric measurements in analytical chemistry – A review." Analytica Chimica Acta 1135 (October 2020): 187–203. http://dx.doi.org/10.1016/j.aca.2020.07.030.

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Brill, Michael H. "Acquisition and reproduction of color images: Colorimetric and multispectral approaches." Color Research & Application 27, no. 4 (June 17, 2002): 304–5. http://dx.doi.org/10.1002/col.10073.

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Guo, Yongming, Jing Li, Shuming Chai, and Jingjing Yao. "Nanomaterials for the optical detection of fluoride." Nanoscale 9, no. 45 (2017): 17667–80. http://dx.doi.org/10.1039/c7nr05981g.

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Hahn, Jungwoo, Eunghee Kim, Youngsang You, and Young Jin Choi. "Colorimetric switchable linker-based bioassay for ultrasensitive detection of prostate-specific antigen as a cancer biomarker." Analyst 144, no. 14 (2019): 4439–46. http://dx.doi.org/10.1039/c9an00552h.

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Dissertations / Theses on the topic "Colorimetric approaches"

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Santos, Figueroa Luis Enrique. "New approaches for the development of chromo-fluorogenic sensors for chemical species of biological, industrial and environmental interest." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/43216.

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El presente proyecto de investigación está enfocado al desarrollo de sensores químicos fluoro-cromogénicos, para la detección y determinación de especies químicas de interés biológico, industrial y medioambiental de forma selectiva y con alta sensibilidad. En forma general, se busca el diseñar nuevos sistemas sensores basados en compuestos (receptores) formados por dos unidades: una unidad coordinante que interacciona con el anión a determinar y una unidad generadora de señal que alerta del reconocimiento molecular efectuado. Durante este estudio se están preparando diversas moléculas receptoras funcionalizandas con grupos modificadores de estructura para evaluar su influencia sobre las capacidades de detección y selectividad como receptores de especies específicas en diferentes condiciones y medios. Las diferentes aproximaciones en prueba implican a su vez el diseño y síntesis molecular, así como el análisis de las diferentes señales ópticas producidas en el reconocimiento, con el fin de diseñar sistemas de alta eficacia y eficiencia, y con posibilidades reales de aplicación.
Santos Figueroa, LE. (2014). New approaches for the development of chromo-fluorogenic sensors for chemical species of biological, industrial and environmental interest [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/43216
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Bernstein, Alexis Ryan. "Discrimination of hemp and marijuana using a fieldable, combined, colorimetric/spectrophotometric approach." Thesis, 2020. https://hdl.handle.net/2144/42081.

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The passage of the 2018 Farm Bill, which included the legalization of regulated hemp production, is causing identification concerns within the forensic science community. Cannabis has two legal constructs, hemp and marijuana, which are macroscopically and microscopically indistinguishable. Hemp and marijuana both contain Δ9-tetrahydrocannabinol (THC), however, the difference between them is based on the percentage of THC by dry weight. Per Section 7606 of the Agricultural Act, hemp is defined as containing less than 0.3% THC by dry weight. This project aims to create a commercially available, off the shelf, fieldable test kit to discriminate between hemp and marijuana. To be able to discriminate between the two categories, it will be important to be able to quantitate the percentage of THC. Fast Blue BB salt (FBBBS) has been shown in previous studies to produce distinct color changes with cannabidiol (CBD) and THC. Eight hemp varieties were obtained, as well as five varieties of marijuana. Cannabinoids were extracted from the plant material with the use of acetonitrile. The colorimetric reaction with FBBBS uses sodium hydroxide as the catalyst. Following the reaction, the samples were analyzed using one of two spectrophotometers, a commercially available handheld device and the other a larger bench-top style spectrophotometer. Qualitative results to date indicate that FBBBS produces a different color change with hemp and marijuana. Hemp produces a dark orange, whereas marijuana produces a golden yellow. Additionally, Ultraviolet–Visible Spectroscopy results show that there are differences in the peak patterns between hemp and marijuana. There are commonalities of absorbances at particular wavelengths between different varieties of hemp, as well as the different varieties of marijuana. This study is to be further expanded on with some of the steps listed as Future Directions. Quantitative data has not yet been obtained, which is an important aspect of the field-test kit to differentiate between the two categories of cannabis. Furthermore, calibration curves will need to be created and used to quantitate the amount of THC and CBD present in purchased samples. A prototype kit has been constructed, consisting of a ruggedized Pelican™ case, a handheld visible spectrophotometer, a sample homogenizer, solvents, transfer pipettes and cuvettes. Another spectrophotometer will be obtained that scans a wider wavelength range.
2021-08-19T00:00:00Z
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Books on the topic "Colorimetric approaches"

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Color: A multidisciplinary approach. Zürich: Verlag Helvetica Chimica Acta, 1999.

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Hardeberg, Jon. Acquisition and Reproduction of Color Images: Colorimetric and Multispectral Approaches. Dissertation.com, 2001.

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Zollinger, Heinrich. Color: A Multidisciplinary Approach. Wiley-VCH, 2000.

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Book chapters on the topic "Colorimetric approaches"

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Xun, Yijing, Qiang Liu, Xiaoxia Wan, Zheng Huang, Guo Cao, and Haiwen Wang. "Polynomial Fitting Approach for Colorimetric Values Transform Based on Large Scale Spectral Dataset." In Lecture Notes in Electrical Engineering, 83–90. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3530-2_11.

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"Colorimetric and Fluorometric Sensor Arrays." In Materials Research Foundations, 220–44. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901175-8.

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The design and construction of colorimetric/fluorometric sensor arrays with high selectivity and sensitivity has been of considerable attention as an emerging technology for mobile chemical detection. Nowadays, many approaches have been made to design sensors, fabricate arrays and generalize their usage areas especially in daily life applications and industrial sectors. This chapter introduces the fundamentals, fabrication methods, and applications of colorimetric and fluorometric sensor arrays. The readers will find detailed information about mechanism of chemical sensing and optical sensor arrays; solid state sensor fabrication methodologies; and specific applications environmental, pharmaceutical, medical, and food sectors.
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Jinseok, Heo, and Kim Chang-Soo. "Analytical Use of Easily Accessible Optoelectronic Devices Colorimetric Approaches Focused on Oxygen Quantification." In Optical Imaging Devices, 27–48. CRC Press, 2017. http://dx.doi.org/10.1201/b19108-2.

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V. Chopade, Vitthal, and Jayashri V. Chopade. "A Digital Image-Based Colorimetric Technique Use for Quantification of Green Active Pharmaceuticals Obtained from Natural Sources." In Colorimetry. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.101398.

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Colorimetry is the determination of colors, as name indicates. This method can use for to find out the concentration of compound (solute) in a colored solution in terms of chemical analysis (solvent). We frequently need to quantify the quantity of a specific component in a combination or the concentration of a solution during scientific activity. The trick is to determine the color differences between various combinations and their absolute values. This is more instructive and scientifically valuable than relying on subjective judgments like the color of the solution. Colorimetry is the measurement of colors, as the name implies. It is the measurement of the concentration of a certain compound (solute) in a colored solution in terms of chemical analysis (solvent). We frequently need to quantify the quantity of a specific component in a combination or the concentration of a solution during scientific activity. The trick is to determine the color differences between various combinations and their absolute values. This is more instructive and scientifically valuable than relying on subjective judgments like the color of the solution. Colorimetry is used in a digital image-based (DIB) approach for determining active medicinal components. A computerized scanner with a controlled light intensity was connected to the detector. Different histograms were used to transform the photos. The colorimetric analysis of digital images provided for an easy-to-use and ecologically friendly method.
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Nouri, Anass, Christophe Charrier, and Olivier Lezoray. "Visual Saliency and Perceptual Quality Assessment of 3D Meshes." In Advances in Multimedia and Interactive Technologies, 38–115. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-5246-8.ch003.

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This chapter concerns the visual saliency and the perceptual quality assessment of 3D meshes. Firstly, the chapter proposes a definition of visual saliency and describes the state-of-the-art methods for its detection on 3D mesh surfaces. A focus is made on a recent model of visual saliency detection for 3D colored and non-colored meshes whose results are compared with a ground-truth saliency as well as with the literature's methods. Since this model is able to estimate the visual saliency on 3D colored meshes, named colorimetric saliency, a description of the construction of a 3D colored mesh database that was used to assess its relevance is presented. The authors also describe three applications of the detailed model that respond to the problems of viewpoint selection, adaptive simplification and adaptive smoothing. Secondly, two perceptual quality assessment metrics for 3D non-colored meshes are described, analyzed, and compared with the state-of-the-art approaches.
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Ustun Karatop, Eslin, Cagla Eren Cimenci, and Ayla Melisa Aksu. "Colorimetric Cytotoxicity Assays." In Cytotoxicity [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105772.

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Cytotoxicity experiments are carried out to evaluate whether a chemical has cytotoxic potential. Because of its ease of use and compatibility with data collected from in vivo investigations, cell-based cytotoxicity studies have emerged as a viable alternative to animal trials in research. Cell-damaging events such as apoptosis, autophagy, and necrosis may occur after exposure to cytotoxic substances. Thanks to the cell-based cytotoxicity studies, basic information is obtained about the cytotoxic effects of the tested substance. To measure cell viability, a variety of techniques are used. Regardless of the sort of cytotoxicity investigation that was carried out, the crucial thing is to figure out how much metabolic activity there is in the cells at the end of the experiment. Cytotoxicity detection methods are generally colorimetric, luminescent, and enzymatic methods. In colorimetric methods, measurement is based on color change using tetrazolium salts, such as MTT, MTS, XTT, WST. Three main steps are followed in tetrazolium compound toxicity tests. Toxic compounds are introduced to cells in the initial stage. The poisonous chemical is eliminated in the second phase and followed by the addition of the tetrazolium compound. The metabolically active cells are determined in the last stage by using a spectrophotometric approach to measure color change.
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Kwan, Chiman, Jin Zhou, and Bence Budavari. "A New Pansharpening Approach for Hyperspectral Images." In Colorimetry and Image Processing. InTech, 2018. http://dx.doi.org/10.5772/intechopen.71023.

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Aharoni, Ran, Asaf Zuck, David Peri, and Shai Kendler. "Reflectance Spectra Analysis Algorithms for the Characterization of Deposits and Condensed Traces on Surfaces." In Colorimetry [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.101301.

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Identification of particulate matter and liquid spills contaminations is essential for many applications, such as forensics, agriculture, security, and environmental protection. For example, toxic industrial compounds deposition in the form of aerosols, or other residual contaminations, pose a secondary, long-lasting health concern due to resuspension and secondary evaporation. This chapter explores several approaches for employing diffuse reflectance spectroscopy in the mid-IR and SWIR to identify particles and films of materials in field conditions. Since the behavior of thin films and particles is more complex compared to absorption spectroscopy of pure compounds, due to the interactions with background materials, the use of physical models combined with statistically-based algorithms for material classification, provides a reliable and practical solution and will be presented.
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Anowar Hossain, Md. "Evaluation of Camouflage Coloration of Polyamide-6,6 Fabric by Comparing Simultaneous Spectrum in Visible and Near-Infrared Region for Defense Applications." In Colorimetry [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.101537.

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Polyamide-6,6 (PA-6,6) knitted fabric was coated with a complex combination of liquid-phase oxidized carbon black pigment (CBP) as light absorber and mono-sulfonated telon violet 3R (TVR) as acid dyes. Nitric acid (NA) moiety was used as liquid-phase oxidation of CBP and hydrophilic transformation of CBP-TVR. Thermoplastic polyurethane (TPU) and N, N-dimethylformamide (DMF) were formulated as cross-linker between composite mixture (CM) and PA-6,6 fabric. Six different CMs were coded for coating of PA-6, 6 fabric such as TPU-DMF, CBP-TPU-DMF, TVR-TPU-DMF, CBP-TVR-TPU-DMF, NA-TVR-TPU-DMF, NA-CBP-TVR-TPU-DMF. Structural, chromatic, and spectral reflection of CM coated PA-6,6 fabric was investigated by scanning electron microscopy, color measurement spectrophotometer, and Fourier transform infrared spectroscopy. CBP formulated PA-6,6 fabric was significantly remarked as maximum light absorber in both visible and near-infrared spectrum without allowing other parameters of treated PA-6,6 fabric. Therefore, minimum light reflection principle of CBP was indicated as camouflage material for camouflage textile coloration/finishing/patterning of simultaneous spectrum probe in visible and near-infrared spectrum. PA-6,6 fabric is very common fabrication for defense clothing, weapon, and vehicle netting against every combat background. This approach of simultaneous spectrum probe may be extended for concealment of target signature against high-performance defense surveillance.
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Takahashi, Yukiko, and Toshishige M. Suzuki. "A Colorimetric Approach to the Detection of Trace Heavy Metal Ions Using Nanostructured Signaling Materials." In Nanotechnology Applications for Clean Water, 417–25. Elsevier, 2009. http://dx.doi.org/10.1016/b978-0-8155-1578-4.50037-8.

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Conference papers on the topic "Colorimetric approaches"

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Ostromoukhov, Victor, Roger D. Hersch, Cecile Peraire, Isaac Amidror, and Patrick Emmel. "Two approaches in scanner-printer calibration: colorimetric space-based versus closed-loop." In IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, edited by Eric Walowit. SPIE, 1994. http://dx.doi.org/10.1117/12.173853.

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Dubey, Alok, Kumud Pant, Hiroj Bagde, Victor Hugo Ñopo Vidal, Juan Carlos Cotrina-Aliaga, and Sheetal Mujoo. "Improved Sensitivity of NiO@R-Go Nanocomposite for Detecting H<sub>2</sub>S Biomaker of Halitosis Prognosis." In International Conference on Recent Advancements in Biomedical Engineering. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/p-66mh0w.

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A colorimetric approach for the quantitative detection of H2S based on a NiO@r-GO composite was developed in this study and is simple, quick, and low-cost. Bimetallic porous material NiO@r-GO with iodide adsorption into their framework have been shown to boost catalytic activity. In this study, we present a new method for enhancing NiO@r-GO peroxidase-like activity. Comparatively, the kinetic measurements of NiO@r-GO demonstrate that it has a great affinity for substrates, facilitating electron transport, as opposed to HRP. Improvements in the activity of NiO@r-GO are attributable to the synergistic effect of the two compounds and to the speedy electron transfer process. This method is very sensitive for H2S colorimetric technique with a LOD of 0.58 nM.
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"SEGMENTING COLOR IMAGE OF PLANTS WITH A SPATIO-COLORIMETRIC APPROACH." In International Conference on Computer Vision Theory and Applications. SciTePress - Science and and Technology Publications, 2010. http://dx.doi.org/10.5220/0002835101910196.

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May, Preston, Jay P. Deville, and Jeffrey Miller. "Shale Inhibitor Tracking for High-Performance Water-Based Drilling Fluids." In IADC/SPE International Drilling Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/208721-ms.

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Abstract Drilling wells with water-based fluid systems can be problematic due to the water reactivity of clay-containing shale minerals. This fundamental issue is the most often cited performance gap between non-aqueous fluid (NAF) and water-based fluids (WBF). The consequences of uncontrolled shale hydration include issues such as bit-balling/accretion, reduced ROP, wellbore collapse, and overall increased wellbore construction costs. This problem is typically addressed by the addition of shale inhibitors which can span multiple types of chemistries. The maintenance of these additives is nuanced due to their inherent depletion on reactive minerals leading to uncertainty of active concentration of these additives during a drilling campaign. Considering the critical need to maintain concentrations of these additives, uncertainty is not an optimal plan to ensure success. To this end, we have designed quantitative shale inhibitor tracking technology to measure amine-based shale inhibitors in high-performance water-based fluids. The method is robust, detects only amine-based swelling inhibitors, and is fully amenable to be performed at a rig site. We developed a colorimetric assay that quantitatively measures amine-based shale inhibitors in filtrates of WBFs. The reaction to generate color utilizes proprietary reagents that selectively target only the amines of interest, and is not influenced by nitrogen-containing polymers such as polyacrylamides. Additionally, the results of the test are not influenced by any common drilling fluid additives, including black powders. The colored solutions produced in the test are measured by advanced spectroscopic analysis with a handheld, portable field meter at a specific wavelength. The absorbance is used to determine the concentration of the amine inhibitor in the fluid filtrate. Finally, we have tested reliability of the method through numerous approaches including Gage Repeatability and Reproducibility statistical analysis. With this new technology, we have explored amine depletion on reactive clays in a lab setting, uncovering unique depletion rates based on amine chemistry. Additionally, we have trialed this technology in multiple wells. We have validated the test method and equipment to be field friendly and accurate, as designed. Our field engineers have included this new measurement alongside a typical mud check. In our validation trials we have already observed different depletion rates based on well and operational procedures for amine inhibitor maintenance, and conflicting values of measured concentrations and product concentration estimates based on calculations. We have coupled high-performance fluid design with shale inhibitor tracking technology to reduce the uncertainty of WBF chemical composition. This technology will allow us to sustain effective concentrations of high-performance additives and improve operational reliability throughout the wellbore construction process. Furthermore, this technology will allow more effective re-use of WBF, reducing the environmental impact of our fluids, and lowering well costs.
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Vrbka, M., M. Vaverka, R. Poliscuk, I. Krupka, and M. Hartl. "Pressure Calculation From Experimentally Evaluated Lubricant Thickness Within EHL Contacts." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44076.

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This paper is concerned with elastohydrodynamic lubrication, especially determination of lubricant film thickness and contact pressure within a point contact of friction surfaces of machine parts. A new solution technique for numerical determination of contact pressure is introduced. Direct measurement of contact pressure is very difficult. Hence, input data of lubricant film thickness obtained from the experiment based on colorimetric interferometry are used for calculation of pressure using the inverse elasticity theory. The algorithm is enhanced by convolution in order to increase calculation speed. The approach gives credible results on smooth contact and it is currently extended to enable the study of contact of friction surfaces with dents.
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Sperka, Petr, Ivan Krupka, and Martin Hartl. "Experimental Study of Artificial Features Attenuation in Rolling/Sliding Concentrated Contacts." In ASME/STLE 2011 International Joint Tribology Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ijtc2011-61068.

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A surface roughness attenuation approach based on the Fourier decomposition of surface roughness into harmonic components may allow predictions of the behavior of real rough surfaces within concentrated contacts. Recently the simplified model for rolling/sliding conditions was suggested. A high pressure ball on disk tribometer was complemented by hi-speed digital camera with the aim to observe a progress of roughness feature pass through the contact. The experiments with artificial features were carried out under rolling/sliding conditions, evaluated by thin film colorimetric interferometry and compared with theory. Detail understanding of real roughness behavior inside contact under rolling/sliding conditions can have extensive impact on practical design of machine components.
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Quan, Shuxue, Noboru Ohta, Roy S. Berns, and Naoya Katoh. "Hierarchical approach to the optimal design of camera spectral sensitivities for colorimetric and spectral performance." In Electronic Imaging 2003, edited by Reiner Eschbach and Gabriel G. Marcu. SPIE, 2003. http://dx.doi.org/10.1117/12.475437.

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Rathinam, R., Devesh Pratap Singh, Arjun Dutta, S. Rudresha, Shaikh Rajesh Ali, and Pratik Chatterjee. "TiO<sub>2</sub> Nanoparticles Based Peroxidase Mimics for Colorimetric Sensing of Cholesterol and Hydrogen Peroxide." In International Conference on Recent Advancements in Biomedical Engineering. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/p-7in58j.

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It's still a challenge to detect cholesterol more rapidly and easily. As a result, using a colorimetric sensor to detect cholesterol may result in the development of a ready-to-use. This research shows how a TiO2 nanoparticles may be utilized as a peroxidase mimic to detect H2O2 and free cholesterol. The TiO2 Nanoparticles was carefully studied in terms of structural, morphological, and functional characteristics. In the existence of cholesterol oxidase, and the proposed approach comprises detecting H2O2 produced during cholesterol oxidation. The TiO2 nanoparticles sensor has shown good cholesterol detection sensitivity with a LOD as low as 0.061 M and a linear response in the 0.1 mM to 50 mM range.
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Napolitano, Rachele, Paolo Chiariotti, and Enrico Primo Tomasini. "Preliminary assessment of Photogrammetric Approach for detailed dimensional and colorimetric reconstruction of Corals in underwater environment." In 2018 IEEE International Workshop on Metrology for the Sea; Learning to Measure Sea Health Parameters (MetroSea). IEEE, 2018. http://dx.doi.org/10.1109/metrosea.2018.8657835.

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Ahmed, Tousief Irshad, Reegan Aruldoss, Bhasker Pant, Indhumathi Kulandhaisamy, R. Raffik, and Ganesh Bhaskarrao Sonawane. "Magnetic Nanoparticle-Based Biosensors for the Sensitive and Selective Detection of Urine Glucose." In International Conference on Recent Advancements in Biomedical Engineering. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/p-45cyly.

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In this work, a diagnostic application was performed by utilizing magnetic nanoparticles for the bio-sensing. A novel Fe3O4 nanostructure was synthesized in this paper using a simple hydrothermal method, the Fe3O4 nanoparticles are successfully controlled to provide a more dynamic site for catalytic reaction. FTIR-analysis, scanning electron microscopy (SEM), X-ray diffraction (XRD) was used to examine the morphology of the synthesized nanoparticles. The findings showed that a unique Fe3O4 nanostructure was obtained nanoparticles confined in nanosphere. The relative catalytic kinetics of Fe3O4 nanostructure has followed Michaelis–Menten behaviours, according to an analysis of peroxidase-like activity. An effective approach for colorimetric sensing of glucose was formulated on the bases of efficient peroxidase-mimicking activity of Fe3O4 nanoparticles. The synthesized Fe3O4 nanoparticles are very hopeful for the application of bio-sensors.
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