Relevant bibliographies by topics / Absorption-maxima

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  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Absorption-maxima'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Absorption-maxima"

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Shulga, Sergii, and Oksana Shulga. "POLYMETHYNE DYES WITH THIAZOLO (3,2-a)PYRIMIDINE AND PYRIMIDO(2,1-b)BENZTHIAZOLE SALTS WITH A TRIFLUOROMETHYL GROUP IN THE PYRIMIDINE CYCLE." Ukrainian Chemistry Journal 89, no. 5 (2023): 26–36. http://dx.doi.org/10.33609/2708-129x.89.05.2023.26-36.

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There are synthesized various types of polymethine dyes from trifluoromethylthiazo­lo(3,2-a)pyrimidinium and trifluoromethyl­pyrimido(2,1-b)benzthiazolium perchlorates various types of polymethine dyes were obtained – styryls, monomethinecyanines, symmetrical and asymmetrical carbocyanines, merocyanines. The absorption maxima and their intensities are determined for each dye, absorption characteristics curves and elemental analysis data for Carbon, Hydrogen and Sulfur are provided. As a result of the dyes absorption maxima analysis containing a tri­-fluoromethyl group in the pyrimidine ring an
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Dev Mahato, Kapil. "Absorption and emission maxima prediction of fluorescent organic materials using optimized neural network models." IOP Conference Series: Materials Science and Engineering 1316, no. 1 (2024): 012011. http://dx.doi.org/10.1088/1757-899x/1316/1/012011.

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Abstract The aim of the study is to predict the absorption and emission maxima from the given dataset, which consists of 3066 fluorescent organic materials. To fulfill this requirement, five optimized neural network models are employed. Out of them, the wide neural network (WNN) model outperformed the other models on validation as well as test results. The results were obtained on the basis of three evaluation parameters: mean absolute error (MAE), root mean squared error (RMSE), and the coefficient of determination (R2). According to the validation scores, the WNN was the best-predictive mode
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Stochmal, Anna, and Wieslaw Oleszek. "Effect of Acylation of Flavones with Hydroxycinnamic Acids on their Spectral Characteristics." Natural Product Communications 2, no. 5 (2007): 1934578X0700200. http://dx.doi.org/10.1177/1934578x0700200511.

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The absorption spectra of twenty-one flavones including glycosides of apigenin, luteolin, chrysoeriol and tricin, nonacylated or acylated with coumaric, ferulic or sinapic acids, were examined to document the influence of acylation on their spectral characteristics. Acylation did not shift the absorption maximum of band II, but the molar absorption coefficients of this band increased 1.3–2.0 fold. Acylation of apigenin and chrysoeriol glycosides did not shift the absorption maximum of band I and the absorption maxima of nonacylated and acylated compounds were at 319–334 nm, but this increased
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Shulga, Sergii, and Oksana Shulga. "POLYMETHYLENE DYES FROM 2-METHYLINDOLO(3,2-B)THIAZOLO(5,4-D)QUINOXALINES HAVING SUBSTITUENTS AT THE NITROGEN ATOM OF THE INDOLE RING." Ukrainian Chemistry Journal 90, no. 1 (2024): 26–35. https://doi.org/10.33609/2708-129x.90.1.2024.26-37.

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Condensation of isatin with N-methylisatin, N-ethyl, N-propyl, N-butyl, N-phenyl, N-benzoyl and 5-nitroisatin with 2-methyl 5,6-diami­nobenzthiazole gave 2-methyl-indolo(3,2-b)thiazolo(5,4-d)quinoxalines with a substituted nitrogen atom in the indole ring. When they are heated with alkyltosylates, quaternary salts are formed from which various cyanine dyes are synthesized: styryls, monomethinecyani­nes, asymmetric carbocyanines. The absorption maxima of each dye were determined and analyzed, and the results of elemental analysis for Carbon, Hydrogen, and Sulfur were given. The influence of sub
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Herman, Brian. "Absorption and Emission Maxima for Common Fluorophores." Current Protocols in Cell Biology 00, no. 1 (1998): A.1E.1—A.1E.5. http://dx.doi.org/10.1002/0471143030.cba01es00.

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Gharibshahi, Elham, Shahidan Radiman, Ahmadreza Ashraf, Elias Saion, Leila Gharibshahi, and Sina Ashraf. "Simulation and Synthesis of Cobalt (Co) Nanoparticles by Gamma Radiation Technique." Micromachines 14, no. 7 (2023): 1383. http://dx.doi.org/10.3390/mi14071383.

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Cobalt nanoparticles were synthesized using the gamma radiolytic technique, and the particle size was found to be reduced from 12±1 to 7±1 nm by increasing the dose from 10 to 60 kGy. The UV-visible absorption spectra were measured and exhibited a steady absorption maxima at 517 nm in the UV region, which blue-shifted toward a lower wavelength with a decrease in particle size. By taking the conduction electrons of an isolated particle that are not entirely free but are instead bound to their respective quantum levels, the optical absorption of the cobalt nanoparticles can be calculated and sim
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Pavlyshche, N. I., A. V. Korotun, and V. P. Kurbatsky. "Optical absorption of composites with metallic nanosized spheroidal particles." Himia, Fizika ta Tehnologia Poverhni 14, no. 4 (2023): 561–68. http://dx.doi.org/10.15407/hftp14.04.561.

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The paper considers the problem of light absorption by a nanocomposite with randomly oriented metal spheroidal particles-inclusions, provided that the volume content of such inclusions is small. Expressions for the frequency dependences of the effective dielectric function and the absorption coefficient of the metal-dielectric nanocomposite are obtained within the effective medium model taking into account the axial symmetry of spheroidal inclusions. The effective relaxation rate of electrons is introduced using the kinetic approach. Numerical calculations are performed for the cases when incl
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Llewellyn, Ben A., E. Stephen Davies, Constance R. Pfeiffer, Mick Cooper, William Lewis, and Neil R. Champness. "Thionated perylene diimides with intense absorbance in the near-IR." Chemical Communications 52, no. 10 (2016): 2099–102. http://dx.doi.org/10.1039/c5cc09962e.

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Chen, P. C. "Absorption maxima study of chromophores of indigoid dyes." International Journal of Quantum Chemistry 60, no. 2 (1996): 681–87. http://dx.doi.org/10.1002/(sici)1097-461x(1996)60:2<681::aid-qua6>3.0.co;2-t.

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Dhammadip, C. Nandgaye, N. Daf Abhijit, Upadesh B. Lade Mr., and Durgesh W. Moharkar Mr. "The Woodward Fisher Regulation for Calculating Absorption Maxima." INTERNATIONAL JOURNAL OF PHARMACEUTICAL AND BIO-MEDICAL SCIENCE 03, no. 07 (2023): 340–44. https://doi.org/10.5281/zenodo.8162277.

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Woodward regulations are countless units of empirically derived guidelines which try to predict the wavelength of the absorption most &lambda;max in an ultraviolet-visible spectrum of a given compound. Inpute used in the calculation are the kind of chromophores present, the auxochromes substituents on the chromophores, and solvent. Example is conjugated carbonyl compound conjugated dienes, and polyenes. One set of Woodward-fishers policies for dienes is outlined is both homoannular with each double bonds contained in one ring or heteroannular with double bonds disbursed between two rings. With
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Dissertations / Theses on the topic "Absorption-maxima"

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Enev, Vojtěch. "Spektrometrické metody pro výzkum huminových látek." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-234656.

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The main aim of doctoral thesis is the study on physicochemical properties of humic substances (HS) by modern instrumental techniques. The subject of the study were HS isolated from South Moravian lignite, South Bohemian peat, forest soil Humic Podzol and finally extract from brown sea algae Ascophyllum nodosum. With respect on determination of structure and reactivity of these unique “biocolloids”, standard samples (Leonardite HA, Elliott Soil HS and Pahokee Peat HS) were also studied. These samples were obtained from International Humic Substances Society (IHSS). All mentioned substances wer
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Book chapters on the topic "Absorption-maxima"

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Mills, Terry, J. Conrad Roberson, William H. Wall, Kevin L. Lothridge, William D. McDougall, and Michael W. Gilbert. "Ultraviolet Absorption Maxima." In Instrumental Data for Drug Analysis. CRC Press, 2018. http://dx.doi.org/10.4324/9781351073714-2.

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"Ultraviolet Absorption Maxima." In Instrumental Data for Drug Analysis, Third Edition - 6 Volume Set. CRC Press, 2005. http://dx.doi.org/10.1201/9781420085457.axd.

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"Experiment 7: determination of absorption maxima and effect of solvents on absorption maxima of organic compounds." In Practical Chemistry. De Gruyter, 2025. https://doi.org/10.1515/9783111702261-008.

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"Appendix 13. Typical UV Absorption Maxima of Substituted Benzenes." In Encyclopedia of Spectroscopy and Spectrometry. Elsevier, 1999. http://dx.doi.org/10.1006/rwsp.2000.0779.

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"Appendix 14. Typical UV Absorption Maxima of Aromatic and Heteroaromatic Compounds." In Encyclopedia of Spectroscopy and Spectrometry. Elsevier, 1999. http://dx.doi.org/10.1006/rwsp.2000.0780.

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Kumar, Pawan, Shweta Dua, Balaram Pani, and Geeta Bhatt. "Application of Fluorescent CQDs for Enhancing the Performance of Solar Cells and WLEDs." In Quantum Dots - Recent Advances, New Perspectives and Contemporary Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.107474.

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Carbon quantum dots (CQDs) are emerging as promising materials for applications like flexible or transparent solar cell, white light emitting diodes (WLEDs), etc. due to their low cost, eco-friendliness, substantial absorption coefficient, wide absorption spectrum, tuneable optical properties, good charge transfer/separation ability, good quantum yield and large two-photon absorption cross-section. They have been employed in solar cells as active absorbing layers, electron acceptors/donors, electron sinks, electron transporting layers (ETL), hole transporting layers (HTLs), dopants, and interl
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Denison, Madeline, Claudia Turro, and Jeremy J. Kodanko. "Illuminating the future: a review of ruthenium-based agents for dual action photochemotherapy and photodynamic therapy." In Photochemistry. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781837672301-00535.

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Platnium-based chemotherapeutics are now being used to treat ∼50% of human cancers, leading to the investigation of other metal-based chemotherapeutics, including ruthenium. Due to their rich photophysical and biological properties, Ru(ii) polypyridyl complexes have been developed as potential photoactivated chemotherapeutics. TLD-1433 is a Ru(ii)-based photosensitizer that utlizes photodynamic therapy (PDT) currently in phase II human clinical trials for the treatment of non-muscle invasive bladder cancer. PDT involves irradiation of a photosensitizer to generate reactive oxygen species (ROS)
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Holmes-Siedle, Andrew, and Len Adams. "Optical media." In Handbook of Radiation Effects. Oxford University PressOxford, 2002. http://dx.doi.org/10.1093/oso/9780198507338.003.0008.

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Abstract Transparent materials have large values of E G, the forbidden gap in electronic energy states. They are transparent because, visible light cannot excite carriers across that gap and hence the material does not absorb visible light. For this to be so, the EG has to be greater than 3 eV. However, when exposed to radiation, transparent materials may darken as new energy levels are created in the gap. A classic example is the production of ‘colour centres’ in alkali chloride crystals. Nearly all multicomponent silicate glasses, as used in optics, produce an absorption in the blue end of t
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Gómez-Osorio, Luis-Miguel, Jenny-Jovana Chaparro-Gutiérrez, and Sara López-Osorio. "Nutrition and Poultry Coccidiosis: Causes, Consequences and Current Strategies to Modulate the Disease." In Advances in Poultry Nutrition Research. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96995.

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Eimeria spp. are parasites specialized in invade and replicate in the intestine, causing coccidiosis, an enteric disease of major economic importance worldwide. The disease causes losses in production and high morbidity ranging from bloody enteritis, with high mortality, to being subclinical silent but affecting feed intake and efficiency. However, intestinal lesions of the infection vary, depending on the species of coccidia. The most important Eimeria species in poultry are: E. tenella, E. acervulina, E. maxima, E. necatrix, E. mitis, E. praecox and E. brunetti. All those species affect diff
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Shapiro, Howard M. "Fluorescent Probes." In Flow Cytometry for Biotechnology. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195183146.003.0006.

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In the jargon of cytometry, cellular characteristics, such as size, nucleic acid content, and membrane potential, are usually referred to as parameters, a term that is also used for the physical characteristics, such as absorption, light scattering, and fluorescence intensity, that are measured by cytometric instrumentation. Fluorescence, as a physical parameter, plays a key role in the detection of probes on beads for multiplexed analysis. Cellular parameters can be classed as intrinsic or extrinsic. Intrinsic cellular parameters are those that can be measured without the use of a reagent; me
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Conference papers on the topic "Absorption-maxima"

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Buchholz, D. B., A. L. Lentine, and R. A. Novotny. "Thermal Considerations in the Design of Opto-Electronic Device Mounts." In Photonics in Switching. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/ps.1995.pfa5.

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For some optoelectronic devices, the optical characteristics of the device are a strong function of the device temperature. An example of this is the self- electro-optic effect device (SEED).[1] SEEDs make use of the shift in wavelength of the exciton absorption maxima that occurs as a function of a changing electrical field across multiple quantum well material.[2] For a typical device, the absorption maxima must be shifted by 3 to 5nm to obtain good contrast between the absorptive and reflective states. A change in the device temperature, however, can also change the location of the exciton
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Venkateswarlu, Putcha, M. C. George, Yerneni V. Rao, H. Jagannath та G. Chakrapani. "Transient excited singlet state absorption in the laser dye α-NPO". У International Laser Science Conference. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/ils.1986.ff3.

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Transient excited singlet state absorption spectrum of the laser dye, α-NPO (8 × 10-5 M/liter in toluene) was recorded in the 4500-6200 Å region with an optical delay of ~ 3 ns between the pump and the probe beams. Nine maxima and three shoulders are observed for the first time in the spectrum. A shoulder at 21090 cm-1 and three maxima at 20,530, 18,685, and 17,980 cm-1 are tentatively attributed to transitions from the vibrational levels at 26,740, 27,350, 29,170, and 29,885 cm-1 belonging to the first excited singlet electronic state S1, respectively, to a common upper level at 47,855 ± 25 c
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Tekiner, Murat, Mustafa Kurt, İlknur Ak, and Arzu Kurt. "Determination of absorption coefficient of Chlorella vulgaris and Arthrospira maxima in water." In TURKISH PHYSICAL SOCIETY 33RD INTERNATIONAL PHYSICS CONGRESS (TPS33). Author(s), 2018. http://dx.doi.org/10.1063/1.5026000.

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Balla, Naveen K., Colin J. R. Sheppard, and Peter T. C. So. "Multiphoton luminescence of gold nanorods upon excitation with wavelengths away from their absorption maxima." In SPIE BiOS, edited by Samuel Achilefu and Ramesh Raghavachari. SPIE, 2011. http://dx.doi.org/10.1117/12.876014.

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Rani, Geeta, Neeraj Tomar, Vijaypal Singh Dhaka, Praveen K. Surolia, Eugenio Vocaturo та Ester Zumpano. "A focused review of ANN-based models for Predicting Absorption Maxima (λmax) of Dyes". У 2023 IEEE International Conference on Big Data (BigData). IEEE, 2023. http://dx.doi.org/10.1109/bigdata59044.2023.10386906.

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Collins, Timothy M., and Mohammad Robiul Hossan. "Radio Frequency and Microwave Power Absorption in Spherical Shaped Objects." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71334.

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Microwave and radio frequency heating has great promise in many engineering and biomedical applications because of its non-contact, volumetric selective heating. However, the heating patterns and temperature distributions are non-uniform due to non-uniform electromagnetic power absorptions. In this study, we present a closed-form analytic expression of electromagnetic field distribution and power absorption in a spherical shaped object. A simplified Maxwell’s equation that represents plane wave is solved in spherical coordinates using vector potentials and separation of variables. The electrom
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Buchholz, D. B., Anthony L. Lentine, and Robert A. Novotny. "Thermal shift in the exciton absorption maxima as a function of the chip package design." In Photonics West '96, edited by Michael R. Feldman and Yung-Cheng Lee. SPIE, 1996. http://dx.doi.org/10.1117/12.236918.

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Nitsas, M. T., and I. P. Koronaki. "A Study on the Performance of Solar Driven Absorption Chiller in Terms of Coefficient Of Performance and Exergy Efficiency." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-69900.

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Abstract Thermally driven chillers also known as sorption heat pumps have drawn considerable attention in recent years. They can be divided into two main categories: absorption (liquid-vapor) and adsorption (solid-vapor) systems. Even though sorption cycles have relatively lower coefficient of performance compared to conventional refrigeration cycles, however they prevail in terms of heat source, electric consumption for moving parts, mechanical wear etc. In order to enhance their environmentally friendly operation, sorption chillers can be driven by solar power. In this study a solar driven a
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Mishra, A., S. Mishra, and R. Bhatt. "Analysis of chemical shift, shift of principal absorption maxima, edge width, percentage of covalency of Cu(II) complexes." In PROF. DINESH VARSHNEY MEMORIAL NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM 2018. Author(s), 2019. http://dx.doi.org/10.1063/1.5098745.

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Popusoi, Ana, Tamara Potlog, Stefan Robu, and Elena Jora. "Chalcons derivatives with 4-(dimethylamino)phenyl group in photovoltaics applications." In Conferința științifică națională cu participare internațională "Integrare prin cercetare și inovare", dedicată Zilei Internaționale a Științei pentru Pace și Dezvoltare. Moldova State University, 2025. https://doi.org/10.59295/spd2024n.90.

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In this paper, dye-sensitized solar cells (DSSCs) are fabricated and studied using chalconic derivatives as sensitizing dyes. The chalconic derivatives containing the 4-N,N-dimethyl group present two absorption bands with maxima located at the 241 nm and 416 nm, with maximum intensity in the visible region and absorption coefficient of the order 104 cm-1. The analysis of the current-voltage characteristics of the DSSCs with the respective chalconic derivative indicattes the best solar energy conversion efficiency (η = 0.4%), due to the fact that it has the highest absorption value in the band
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