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Relevant bibliographies by topics / Visible spectrophotometric

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Academic literature on the topic 'Visible spectrophotometric'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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Journal articles on the topic "Visible spectrophotometric"

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Dr.L.Satyanarayana*, and T.Padmini. "SPECTROPHOTOMETRIC DETERMINATION OF AMPRENAVIR IN FORMULATION SAMPLE." Indo American Journal of Pharmaceutical Sciences 04, no. 07 (2017): 2204–8. https://doi.org/10.5281/zenodo.838700.

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A validate rapid, economical and sensitive visible spectrophotometric method has been developed for quantitative determination of amprenavir in bulk drug and tablet samples.This method is validated for irinotecan with chromogenic reagent namely bromo cresol green (BCG) at λ max 417. The calibration curve was linear over a concentration range of 5-40 µg/ml. The relative standard deviation (R.S.D) is less than 1% and average recovery was above 99.60%. Efficient visible spectrophotometric detection at λmax 417nm enabled determination of the drug with no interference from tablet excipients. The proposed method is fast, sensitive, precise, accurate and efficient and can be used for analysis in quality control laboratories. Key Words: Ultraviolet-Visible Spectrophotometry, amprenavir, bromocresol green(BCG), Phosphate buffer, ion association complex.

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Bhusari, Sachin, Rukayya Shaikh, and Pravin Wakte Pravin Wakte. "Development and Validation of Uv- Spectrophotometric Method for Estimation of Jatamansone in Nardostachys Jatamansi." International Journal of Pharmaceutical Research and Applications 10, no. 2 (2025): 220–28. https://doi.org/10.35629/4494-1002220228.

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Aim: This study aimed to develop and validate a simple, precise, and cost-effective UV- visible spectrophotometric method for the estimation of jatamansone in Nardostachys jatamansi extract. The analysis parameters were selected following the ICH Q2 (R1) guideline. Methods: Jatamansone solution was scanned across the UV-visible range to identify its wavelength of maximum absorbance. Calibration standards of jatamansone were prepared, and a concentration vs. absorbance calibration curve was plotted. The developed UV-visible spectrophotometric method was utilized to estimate jatamansone in standardized extracts of Nardostachys jatamansi. Results: The maximum wavelength of jatamansone was determined to be 278nm. The developed UVvisible spectrophotometric method exhibited a correlation coefficient of 0.999 over a concentration range of 1-6 μg/ml. Validation of the method included assessments of linearity, accuracy, precision, robustness, ruggedness, limit of detection, and limit of quantitation. The developed UV-visible method demonstrated good precision for both intra- and inter-day studies, with standard deviations ranging from 0.75 to 1.798 and 0.889 to 1.572, respectively. The content of jatamansone in the Nardostachys jatamansi extract was found to be 4.72% using the proposed UV-visible spectrophotometry method. Conclusion: A simple, precise, and cost-effective UV-visible spectrophotometric method was successfully developed for the estimation of jatamansone in standardized extracts of Nardostachys jatamansi. The method utilized a solvent with an economical percentage of the organic phase in aqueous media. The validated UVvisible method can be efficiently employed for the estimation of jatamansone in Nardostachys jatamansi extracts.

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G., KoteshwarRao* R.VijayaVani M.Shiresha B.Vidya I.Santhosh K. Rajeswar Dutt and K. N. V. Rao. "A NEW METHOD DEVELOPMENT AND VALIDATION OF AXITINIB BULK AND PHARMACEUTICAL DOSAGE FORM BY USINGUV-VISIBLE SPECTROSCOPY AS PER ICH GUIDELINES." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 03 (2018): 1704–10. https://doi.org/10.5281/zenodo.1210043.

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The objective of the present work was to develop a simple, efficient and reproducible spectrophotometric method for the quantitative estimation of Axitinib drug in its active pharmaceutical ingredient (API) form. The developed UV-Visible spectrophotometric method for the quantitative estimation of drug –Axitinib measurement of absorption at a wavelength maximum (λmax) of 260 nm using methanol as diluents. The method was validated as per the ICH guidelines. The proposed method can be successfully applied for the estimation of Axitinib in pharmaceutical dosage forms.The linearity dynamic range 10-70 μg/ml and effective mean percentage recoveries were 102.5% and LOQ, LOD values of Axitinib were found to be 1.62 and 5.04(µg/ml) Key Words: Axitinib, Method Development, Validation, UV-Visible spectrophotometry.

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R, Selvi S. "UV-Visible Spectrophotometric Method of Paracetamol Tablet Formulation." International Journal of Trend in Scientific Research and Development Volume-2, Issue-5 (2018): 1749–53. http://dx.doi.org/10.31142/ijtsrd17154.

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Suhartono, Eko, Ari Yunanto, Edi Hartoyo, et al. "UV-Visible Spectrophotometric as a Prospective Tool in Neonatal Sepsis." Indonesian Biomedical Journal 10, no. 1 (2018): 74. http://dx.doi.org/10.18585/inabj.v10i1.360.

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BACKGROUND: This study was aimed to employ the UV-Visible (UV-Vis) spectrophotometry techniques to detect the changes in the blood of neonatal sepsis (NS) subject for a deeper understanding in the pathomechanism of NS.METHODS: The cross-sectional study was conducted from February to May 2017 in the Neonatology Division, Department of Pediatric, Ulin General Hospital/Faculty of Medicine, Lambung Mangkurat University, Banjarmasin, South Kalimantan, Indonesia. Blood specimens were taken from newborns, of which 15 each of newborns at risk of sepsis and without risk of sepsis. Data were analyzed by using Mann-Whitney U test.RESULTS: The result of this study suggested that there is a significant difference in the average of absorbance ratio parameter using UV-Vis spectrophotometric methods on the case group compared to the control group. Also, there is a significant difference between advanced oxidation protein products (AOPPs) and thiocyanate (SCN) level in newborn at risk of sepsis.CONCLUSION: The present study demonstrated there were significant differences between the average of absorbance ratio parameter for protein and oxy-hemoglobin region using UV-Vis spectrophotometric methods in healthy subjects and newborn at risk of sepsis.KEYWORDS: spectrophotometric, neonatal sepsis, oxidative stress

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Sachin Bhusari, Harshavardhan Karnik, and Pravin Wakte. "Development and validation of UV-spectrophotometric method for estimation of pterostilbene in Pterocarpus marsupium." World Journal of Advanced Research and Reviews 17, no. 1 (2023): 1123–31. http://dx.doi.org/10.30574/wjarr.2023.17.1.0116.

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Aim: To develop and validate a simple, precise and cost effective UV-visible spectrophotometric method for the estimation of pterostilbene in Pterocarpus marsupium extract. All the parameters of the analysis were chosen as per ICH Q2 (R1) guideline. Methods: Pterostilbene solution was scanned over UV-visible range for its wavelength of maximum absorbance. Various calibration standards of pterostilbene were prepared. Calibration curve of concentration vs. absorbance was plotted and developed UV – visible spectrophotometry method was used for estimation of pterostilbene in standardized Soxhlet assisted extract (SAE)as well as ultrasound assisted extracts (UAE) of Pterocarpus marsupium. Results: The maximum wavelength of pterostilbene was found to be 306 nm. The correlation coefficient of developed UV-Visible spectrophotometric method over the concentration range of 1-6 μg/ml was found to be 0.999. The validation study of the said method was carried out in terms of linearity, accuracy, precision, robustness, ruggedness, limit of detection and limit of quantitation studies. Developed UV – visible method was found to be precise for the intra- and inter- day studies and showed standard deviation in the range of 0.83 to 1.912&0.762 to 1.542respectively. The pterostilbene content in Pterocarpus marsupium extract was found to be 4.5% using the proposed UV – visible spectrophotometry method. Conclusion: A simple, precise and cost-effective UV- visible spectrometry method was developed for the estimation of pterostilbene in standardized extract of Pterocarpus marsupium. The method was developed using solvent containing economical percentage of organic phase in aqueous media. Said validated UV- visible method can be efficiently used for the estimation of pterostilbene in extracts of Pterocarpus marsupium.

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Majhi, Somyadeep, Saroj Kumar Patro, and P. Sudhir Kumar. "Visible Spectrophotometric Estimation of Aripiprazole." Asian Journal of Research in Chemistry 8, no. 12 (2015): 739. http://dx.doi.org/10.5958/0974-4150.2015.00119.4.

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Sachin, Bhusari, Karnik Harshavardhan, and Wakte Pravin. "Development and validation of UV-spectrophotometric method for estimation of pterostilbene in Pterocarpus marsupium." World Journal of Advanced Research and Reviews 17, no. 1 (2023): 1123–31. https://doi.org/10.5281/zenodo.8090612.

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<strong>Aim:</strong> To develop and validate a simple, precise and cost effective UV-visible spectrophotometric method for the estimation of pterostilbene in Pterocarpus marsupium extract. All the parameters of the analysis were chosen as per ICH Q2 (R1) guideline. <strong>Methods: </strong>Pterostilbene solution was scanned over UV-visible range for its wavelength of maximum absorbance. Various calibration standards of pterostilbene were prepared. Calibration curve of concentration vs. absorbance was plotted and developed UV – visible spectrophotometry method was used for estimation of pterostilbene in standardized Soxhlet assisted extract (SAE)as well as ultrasound assisted extracts (UAE) of <em>Pterocarpus marsupium</em>. <strong>Results:</strong> The maximum wavelength of pterostilbene was found to be 306 nm. The correlation coefficient of developed UV-Visible spectrophotometric method over the concentration range of 1-6 μg/ml was found to be 0.999. The validation study of the said method was carried out in terms of linearity, accuracy, precision, robustness, ruggedness, limit of detection and limit of quantitation studies. Developed UV – visible method was found to be precise for the intra- and inter- day studies and showed standard deviation in the range of 0.83 to 1.912&0.762 to 1.542respectively. The pterostilbene content in <em>Pterocarpus marsupium</em> extract was found to be 4.5% using the proposed UV – visible spectrophotometry method. <strong>Conclusion:</strong> A simple, precise and cost-effective UV- visible spectrometry method was developed for the estimation of pterostilbene in standardized extract of <em>Pterocarpus marsupium</em>. The method was developed using solvent containing economical percentage of organic phase in aqueous media. Said validated UV- visible method can be efficiently used for the estimation of pterostilbene in extracts of <em>Pterocarpus marsupium</em>.

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Setty K, Nagaraja, and Chakravarthi I. E. Chakravarthi I. E. "A UV-Visible Spectrophotometric Determination of atenolol in Pharmaceutical Formulations." International Journal of Scientific Research 2, no. 3 (2012): 31–32. http://dx.doi.org/10.15373/22778179/mar2013/11.

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Tejaswini, Kande, Dhekale Pallavi, Khatal Supriya, and Borude Priyanka. "Development and Validation of Analytical Methods for Simultaneous Spectrophotometric Determination of Pioglitazone and Glimepiride by Derivative Method." International Journal of Trend in Scientific Research and Development 4, no. 1 (2019): 822–25. https://doi.org/10.5281/zenodo.3609706.

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A simple, rapid UV Visible spectrophotometric method for the quantification of Pioglitazone hydrochloride and Glimepiride in bulk drug and tablet formulation was developed and validated. UV Visible spectrophotometric methods have been developed for the Derivative Spectrophotometric Method, of Pioglitazone and glimepiride in bulk and pharmaceutical dosage forms. the sampling wavelengths selected are 210 nm and 218 nm over the concentration ranges of 1.5 7.5 Âµg ml and 0.2 1.0 Âµg ml for pioglitazone and glimepiride respectively. Tejaswini Kande | Pallavi Dhekale | Supriya Khatal | Priyanka Borude "Development and Validation of Analytical Methods for Simultaneous Spectrophotometric Determination of Pioglitazone and Glimepiride by Derivative Method" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-1 , December 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29699.pdf

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Dissertations / Theses on the topic "Visible spectrophotometric"

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Feather, J. W. "A reflectance spectrophotometric study of the interaction of visible and ultraviolet radiation with skin." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304206.

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Río, Sánchez Vanessa del. "Fast analytical methodologies based on molecular spectrophotometric techniques and multivariate data analysis." Doctoral thesis, Universitat Rovira i Virgili, 2010. http://hdl.handle.net/10803/9056.

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El objetivo principal de esta tesis es el desarrollo de metodologías analíticas rápidas basadas en técnicas espectrofotométricas moleculares y análisis de datos multivariantes. Estas metodologías se han aplicado para la resolución de dos problemas analíticos relacionados con los aceites vegetales como materias primas. <br/>Uno de ellos es la evaluación de las posibilidades que ofrecen los aceites vegetales como precursores de pre-polímeros. Se ha demostrado que la espectroscopía de infrarrojo combinada con tratamiento de datos de segundo orden es una herramienta útil para llevar a cabo el análisis cuantitativo de reacciones poliméricas modelo en las cuales intervienen aceites vegetales como reactivos iniciales. <br/>El segundo es el control de calidad del biodiesel. Se han desarrollado dos métodos basados en análisis por inyección secuencial con detección UV-visible y tratamiento de datos de segundo orden para llevar a cabo la determinación de parámetros de interés para la caracterización del fuel.<br>L'objectiu principal d'aquesta tesi és el desenvolupament de metodologies analítiques ràpides basades en tècniques espectrofotomètriques moleculars i anàlisi de dades multivariants. Aquestes metodologies s'han aplicat a la resolució de dos problemes analítics relacionats amb els olis vegetals com a matèries primes. <br/> Un d'ells és l'avaluació de les possibilitats que ofereixen aquests olis com a precursors de pre-polímers. S'ha demostrat que la espectroscopia d'infraroig combinada amb el tractament de dades de segon ordre és una eina útil per dur a terme l'anàlisi quantitatiu de reaccions polimèriques model en les quals intervenen olis vegetals com a reactius inicials. <br/> El segon és el control de qualitat del biodiesel. S'han desenvolupat dos mètodes basats en l'anàlisi per injecció seqüencial amb detecció UV-visible i tractament de dades de segon ordre per dur a terme la determinació de paràmetres d'interès per a la caracterització del fuel.<br>The main objective of this thesis is the development of fast analytical methodologies based on molecular spectrophotometric techniques and multivariate data analysis. These methodologies have been applied to the resolution of two analytical problems related to the vegetable oils as raw materials. <br/>One of them is the evaluation of the possibilities that modified vegetable oils offer as precursors of pre-polymers. It has been demonstrated that infrared spectroscopy combined with second-order data treatment is a powerful tool to carry out the quantitative analysis of model polymer reactions of interest to obtain vegetable oil-thermosetting materials. <br/>The other one is the quality control of biodiesel. Two methods based on sequential injection analysis with UV-visible detection and second-order data treatment have been developed to determine the specific parameters of interest for the characterization of the fuel.

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Newkirk, Scott Hunter. "Detection levels of drinking water contaminants using field portable ultraviolet and visible light (uv/vis) spectrophotometry /." Download the thesis in PDF, 2005. http://www.lrc.usuhs.mil/dissertations/pdf/NEWKIRK2005.pdf.

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Beltramin, Gabrielle Dias Rosa 1985. "Estudo da estabilidade de corantes azo em alimentos por espectrofotometria UV-visível = Study of the stability of azo dyes used in food by UV-Visible spectrophotometry." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254816.

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Orientador: Marcelo Alexandre Prado<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-20T15:27:48Z (GMT). No. of bitstreams: 1 Beltramin_GabrielleDiasRosa_M.pdf: 5469686 bytes, checksum: 507fcd03670f5e77f40d07836a855261 (MD5) Previous issue date: 2012<br>Resumo: O emprego de aditivos químicos em alimentos é um assunto que tem gerado bastante controvérsiaentre consumidores, indústrias, pesquisadores e governo. Exemplo são os corantes artificiais, aditivos bastante utilizados pela indústria de alimentos na coloração de seus produtos. Sem valor nutricional, seu uso é justificado apenas por questões alimentares. Em comparação com os corantes naturais, apresentam maior uniformidade, estabilidade e poder tintorial. Apesar das vantagens, evidências toxicológicas são consideravelmente maiores para os corantes artificiais e, apesar da alta estabilidade podem ter essa característica prejudicada por efeito de fatores físicoquímicos, como luz, temperatura e conservantes presentes na composição de alimentos e bebidas. Tendo em vista as características climáticas no Brasil e, levando em consideração sua enorme extensão, é de interesse analisar a estabilidade de corantes artificiais comumente utilizados em alimentos e bebidas comercializadas no país, uma vez que, a instabilidade desses corantes pode afetar a qualidade do produto, bem como causar riscos a saúde. Estudos comprovaram a influência de açúcares, ácidos ascórbico, sórbico, cítrico e benzóico na estabilidade de alguns corantes azo, porém, ácido cítrico em presença de ácido ascórbico ainda não foi abordado de forma minuciosa. Assim, o presente trabalho teve como objetivo estudar a estabilidade dos corantes tartrazina, amarelo crepúsculo e amaranto frente aos efeitos de luz, temperatura e presença dos ácidos ascórbico e cítrico, utilizando a técnica de espectrofotometria UV-visível. A estabilidade dos corantes também foi analisada em misturas de corantes para verificar a existência ou não de sinergia. Resultados demonstraram maior estabilidade dos corantes tartrazina e amarelo crepúsculo, independente das condições de estocagem. O amaranto apresentou alta instabilidade, principalmente em condições de alta temperatura e luz solar. Essas condições, de modo geral, provocaram maior instabilidade para os três corantes, que por outro lado, mantiveram-se estáveis em condição de escuro e baixa temperatura. A presença de ácido cítrico e ácido ascórbico provocou maior instabilidade dos corantes em todas as condições físicas testadas, exceto para a condição de escuro e alta temperatura, o qual apresentou estabilidade semelhanto ao grupo com presença apenas de ácido ascórbico. A análise de soluções com mistura de corantes garantiu, principalmente, maior estabilidade ao amaranto tanto na presença do amarelo crepúsculo quanto da tartrazina. Análises com bebidas coloridas artificialmente confirmaram o efeito da luz solar na diminuição da estabilidade dos corantes e da temperatura baixa na estabilidade desses compostos<br>Abstract: The adding of chemical additives in foods and beverages is a controversial issue between consumers, industries, researchers and government. Examples are artificial dyes, so used by food industries to color foodstuffs. With no nutritional value, use is only justified by alimentary habit. In comparison to natural dyes, they present higher uniformity, stability and coloring power. In spite of these advantages, toxicological evidences for artificial dyes are even higher than for natural ones and stability can be affected by physical-chemical factors, like for example, light, temperature and presence of preservative compounds in foods and beverages. Given the climatic characteristics in Brazil and taking into account its enormous extent, it is interesting to analyze the stability of artificial dyes commonly used in foods and beverages traded in the country, since the instability of these dyes can affect product quality as well as causing health risks. Researches have already proved sugar, ascorbic, sorbic, citric and benzoic acids influence on the stability of some azo dyes, though there are no information about citric and ascorbic acids influence together on the stability of tartrazine, sunset yellow and amaranth, neither when they are mixed with another artificial dye. Therefore, the aim of this study was to check the stability of tartrazine, sunset yellow and amaranth by the effects of light, temperature and presence of ascorbic and citric acid, using the technique of UV-visible spectrophotometry. Dyes¿ stability was also analyzed at dye mixtures to verify the existence of synergy. Results showed greater stability of tartrazine and sunset yellow, regardless of storage conditions. Amaranth was highly unstable, especially under conditions of high temperature and sunlight. These conditions generally caused greater instability for the three azo dyes. On the other hand, their color remained stable at dark and low temperature condition. The presence of citric and ascorbic acid caused greater instability of the dyes in all physical tested conditions, except for dark and high temperature condition, which presented the same stability of the group with only ascorbic acid. Analysis of dye mixture solutions ensured, especially, greater stability to amaranth in the presence of either sunset yellow or tartrazine. Analysis with artificially colored beverages confirmed the effect of sunlight in dyes¿ stability decrease and low temperature in the stability of these compounds<br>Mestrado<br>Ciência de Alimentos<br>Mestre em Ciência de Alimentos

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LESAINT, VINCENT. "Contribution a l'etude de l'hydrogenation d'alliages amorphes sisn co-evapores en couches minces par spectrophotometrie visible et infra-rouge et par spectroscopie de deflexion photothermique." Paris 7, 1989. http://www.theses.fr/1989PA077245.

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Dans la premiere partie, la constante dielectrique complexe de couches minces d'alliages amorphes homogenes si#1##xsn#x (0<x<0. 5) preparees par coevaporation sur support froid a nancy, est etudiee en detail entre 0. 5 et 3 ev en fonction de la composition. L'analyse des spectres optiques permet entr'autres de determiner deux parametres caracteristiques des effets d'alliage, le gap optique et le gap moyen. L'ensemble des resultats est interprete a l'aide d'un modele de milieu effectif base sur la presence d'ordre chimique. La deuxieme partie est consacree a l'etude de l'hydrogenation de couches de si amorphe, puis d'alliages amorphes si#1##xsn#x, par incorporation d'hydrogene atomique pendant le depot. Les modes de liaison de l'hydrogene (et de l'oxygene) sont caracterises par spectroscopie infra-rouge, completee par des experiences d'exodiffusion a barcelone, et d'erda a strasbourg. Les modifications de la densite d'etats electroniques dans le pseudo-gap sont etudiees a partir des spectres d'absorption optique obtenus par spectroscopie de deflexion photothermique. L'influence des divers parametres est analysee systematiquement, dans le but d'ameliorer les materiaux hydrogenes. On montre notamment que la porosite induite, responsable de la contamination par l'oxygene, est reduite par depot a haute temperature. L'addition de sn favorise la porosite et l'incorporation d'hydrogene faiblement lie, et introduit des etats de defauts supplementaires dans le pseudo-gap, malgre la presence de liaisons sn-h

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Nonoyama, Akihisa. "Using Multiwavelength UV-Visible Spectroscopy for the Characterization of Red Blood Cells: An Investigation of Hypochromism." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000508.

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Ashie, Jennifer Bernice. "Study on Methods of Simultaneous Multi-Component Analysis." Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etd/1989.

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Many new instrumentation and different instrumental techniques have been developed to deal with increasing complexity of samples encountered. Many researchers also have coupled these instrumental techniques with chemometric algorithms to assist in the quantitative analysis of multi-component samples in the hope of alleviating the need of tedious separation and cleanup procedures. These newer chemometric procedures tend to be complex and difficult to understand and implement and are successful under different circumstances and conditions. In this study, we start from the very simple beginning and examine the factors that can present difficulties with obtaining the correct results and observe how the system behaves so as to find a better and simpler chemometric procedure to perform mixture quantitative analysis. We have used simulated and actual experimental data obtained from a UV-VIS spectrophotometric measurement of metal complexes to conduct the study. Well understood and defined systems tend to give good results. The main obstacle has been, and still is, interferences in spectral information one gets from the measurement.

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KUNTZ, PHILIPPE. "Conception d'un systeme de mesure en continu des nitrates, des matieres organiques et des matieres en suspension dans les eaux residuaires, traitees par spectrophotometrie d'absorption dans l'ultraviolet et le visible." Université Louis Pasteur (Strasbourg) (1971-2008), 1995. http://www.theses.fr/1995STR13260.

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Avec la recente loi sur l'eau de janvier 1992 qui comporte une necessite de traitements des eaux residuaires toujours plus pousses, donc delicats a gerer, il devient indispensable d'acceder a une meilleure connaissance des flux de pollution, notamment azotee. Or, la mesure en continu et sur site des nitrates (no 3) n'est pas encore suffisamment fiable ou est trop complexe et couteuse. Pour tenter de remedier a cette situation, nous avons etudie un principe de mesure simple et relativement selectif : l'absorption directe du rayonnement ultraviolet par les ions nitrates. Une etude de faisabilite avec un spectrophotometre de laboratoire, sur des echantillons reels, nous a permis d'obtenir un modele simple de calcul des concentrations en nitrates, applicable aux eaux usees de rejet provenant de differents types de traitements, mais aussi a des eaux superficielles ou de nappe. Ce modele universel (independant du site) tient compte de certains interferents dans des gammes de concentrations susceptibles d'y etre rencontrees. La mesure des matieres en suspension et des matieres organiques a ete prise en compte, rendant possible la realisation d'un capteur multiparametre. La longueur du trajet optique retenue permet d'obtenir une bonne linearite sur la gamme 0-150 mg/l no 3 et une precision sur effluents traites de l'ordre de 3 mg/l (niveau de confiance a 95%). D'autre part, aucune filtration de l'effluent n'est necessaire pour des concentrations en matieres en suspension allant jusqu'a 300 mg/l, et un systeme de nettoyage par raclage devrait etre adaptable aux dimensions de la cellule de mesure. Cette etude s'est poursuivie par la realisation d'une maquette, prefigurant un prototype pour sa partie optique : source deuterium, fibres optiques et spectrophotometre monolithique a barrette de photodiodes. Les premiers resultats sont tres encourageants puisqu'ils confirment la faisabilite de la mesure des nitrates, mais aussi de l'utilisation des fibres optiques. Ce dernier point n'est rendu possible que par l'emploi de longueurs d'onde superieures a 220 nm, limite de leur transmission dans l'ultraviolet.

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Despax, Stéphane. "Complexation de l'ADN par des composés organoruthénés et étude de l'adhésion cellulaire sur des substrats mous." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAE006/document.

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Le domaine général de cette thèse est l’étude des procédés physico-chimiques impliqués dans le développement du cancer et/ou leurs thérapies. La première partie est consacrée à la caractérisation des interactions mises en jeu lors de l’association de complexes du ruthénium avec la macromolécule d’ADN. La caractérisation expérimentale de cet équilibre est faite par des manipulations d’absorption UV-visible et de dichroïsme circulaire. Une méthode d’analyse originale est utilisée pour arriver à mettre en évidence la présence simultanée de deux modes d’associations. Un modèle à deux équilibres traduisant convenablement ces observations et permettant d’identifier les deux modes d’association est alors proposé. La deuxième partie constitue un travail préliminaire à l’étude des mouvements cellulaires sur un substrat mou. Des caractérisations du comportement des cellules en fonction de la rigidité de leur substrat a pu être mis en évidence et donnent des résultats similaires à la littérature<br>The general area of this thesis is the study of physico-chemical processes involved in can- cer development and / or their therapies. The first part is devoted to the characterization of the interactions involved in the association of ruthenium complexes with the DNA macromolecule. Experimental characterization of this equilibrium is made by UV-visible absorption and circular dichroism experiments. An original method of analysis is used to highlight the simultaneous presence of two association modes. A two equilibria model fits correctly the experimental data and permits the identification of these two association modes. The second part is a preliminar work about cell movements on a soft substrate. Characterizations of cell behavior depending on the substrate rigidity has been highlighted and give similar results in the literature

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Baldissera, Denise Bom. "Espectrofotometria aplicada na análise de nanocarreadores lipídicos contendo ativos para lipodistrofia ginoide." Universidade Franciscana, 2014. http://tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/230.

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Made available in DSpace on 2018-06-27T18:56:23Z (GMT). No. of bitstreams: 3 Denise Bom Baldissera.pdf: 939670 bytes, checksum: 68115013c164645744ccf4e19e85a72e (MD5) Denise Bom Baldissera.pdf.txt: 162065 bytes, checksum: 86ebe1a57531232453a3049c98d7c692 (MD5) Denise Bom Baldissera.pdf.jpg: 3681 bytes, checksum: 1841930f64ea683f73bf3a5feed3dc8e (MD5) Previous issue date: 2014-04-29<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Gynoid lipodystrophy (GLD), also known as cellulite, is a common dermatological condition among women after the puberty, mainly concentrated in the pelvic region, lower limbs and abdomen. It´s a tissue edematous infiltration that promotes unattractive changes, the skin becomes to have a paddled aspect or orange peel , conducing to a low self esteem. The exactly etiology of GLD is unknown, however, its presence and level are related to several factors like genetic, emotional, metabolic and hormonal, besides the age, sex, blood pressure, obesity and habits like smoke, sedentary, tight clothes and poor diet. There are many ways to treat this condition, being the most used and easy accessed the use of cosmetic products having as active principles the vasopressure action, anti-inflammatory, lower microcirculation and lipolytic agents. In the present work, methods for analysis of the lipid nanocarrier containg actives employees for GLD treatment (diidromiricetin, diosgenin and synephrine) were developed and validated. There aren t decrypted monographs in pharmacopeias to analyze these substances in pharmaceutical formulas. In the spectrophotometric method UV-VIS the diosgenin and the dihydromyricetin were quantified in 434 nm and 561 nm, respectively, used as reagents sulfuric acid and ρ- anisaldehyde. Synephrine can be quantified by the derivative ultraviolet spectrophotometry, 239 nm wave-length, in the second order, medium scan, Δλ 10.000 and scale factor of 50, using ethanol as a solvent. The methods showed to be specific, linear, precise, exact and robust to the actives quantification. It can be concluded that the validated methods were of easy execution, fast and with a low cost, to do the quality control analyses.<br>A lipodistrofia ginoide (LDG), também chamada de celulite, é uma afecção dermatológica comum entre mulheres após a puberdade, concentrando-se preferencialmente na região pélvica, membros inferiores e abdome. Trata-se de uma infiltração edematosa do tecido conjuntivo que promove alterações esteticamente desagradáveis, fazendo com que a pele assuma um aspecto acolchoado ou casca de laranja , levando a uma diminuição da auto-estima. A exata etiologia da LDG é desconhecida, contudo, sua presença e grau de comprometimento estão relacionados a diversos fatores como genéticos, emocionais, metabólicos e hormonais, além da idade, sexo, hipertensão arterial, obesidade e hábitos como fumo, sedentarismo, roupas apertadas e má alimentação. Existem inúmeras formas de se tratar essa condição, sendo a mais utilizada e de fácil acesso o uso de cosméticos contendo princípios ativos com ação vasopressora, anti-inflamatória, estimuladores da microcirculação periférica e agentes lipolíticos. No presente trabalho, métodos para análise de um nanocarreador lipídico contendo ativos empregados para o tratamento da LDG (diidromiricetina, diosgenina e sinefrina) foram desenvolvidos e validados. Não há monografias descritas em farmacopéias para análise desses ativos em formulações farmacêuticas. No método espectrofotométrico UV-VIS a diosgenina e a diidromiricetina foram quantificadas em 434 nm e 561 nm, respectivamente, utilizando como reagentes ácido sulfúrico e ρ-anisaldeido. A sinefrina pode ser quantificada por espectrofotometria ultravioleta derivada, no comprimento de onda de 239 nm, na segunda derivada, velocidade de varredura média, Δλ 10.000 e fator escala de 50, utilizando etanol como solvente. Os métodos demonstraram serem específicos, lineares, precisos, exatos e robustos para a quantificação dos ativos. Sendo assim, pode-se concluir que os métodos validados foram de fácil execução, rápidos e de baixo custo, para a realização das análises de controle de qualidade.

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Books on the topic "Visible spectrophotometric"

1

S, Görög. Ultraviolet-visible spectrophotometry in pharmaceutical analysis. CRC Press, 1995.

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Unicam, Pye, ed. Introduction to ultraviolet & visible spectrophotometry. 2nd ed. Pye Unicam, 1985.

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Olivier, Thomas, and Burgess C, eds. UV-visible spectrophotometry of water and wastewater. Elsevier, 2007.

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National Institute of Standards and Technology (U.S.), ed. REPORT ON THE RESULTS OF SIM.QM-P6 UV/VISIBLE SPECTROPHOTOMETRY WAVELENGTH STANDARD INTER-LABORATORY COMPARISON... NISTIR 6961... U.S. DEPART. s.n., 2003.

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Dutta, Mala. Ultraviolet-Visible Spectrophotometry. IVY Publishing House, 2002.

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Görög, Sándor. Ultraviolet-Visible Spectrophotometry in Pharmaceutical Analysis. CRC Press, 2018. http://dx.doi.org/10.1201/9781351077422.

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Ultraviolet-Visible Spectrophotometry in Pharmaceutical Analysis. Taylor & Francis Group, 2017.

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Gorog, S. Ultraviolet-Visible Spectrophotometry in Pharmaceutical Analysis. Taylor & Francis Group, 2018.

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Gorog, S. Ultraviolet-Visible Spectrophotometry in Pharmaceutical Analysis. Taylor & Francis Group, 2018.

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Gorog, S. Ultraviolet-Visible Spectrophotometry in Pharmaceutical Analysis. Taylor & Francis Group, 2018.

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Book chapters on the topic "Visible spectrophotometric"

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Loconto, Paul R. "Visible Spectrophotometric Determination of Trace Levels of Iron in Groundwater." In Laboratory Experiments in Trace Environmental Quantitative Analysis. CRC Press, 2022. http://dx.doi.org/10.1201/9781003260707-4.

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Adhikary, Babita, and Ladi Alik Kumar. "UV-visible spectrophotometric method for estimation of Tacrolimus in bulk and different pharmaceutical capsules." In Advancement in Animal Handling and Generative AI for Pre-clinical Studies. CRC Press, 2025. https://doi.org/10.1201/9781003672869-17.

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Gooch, Jan W. "Visible Spectrophotometry." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_12619.

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Cole, Kenneth, and Barry S. Levine. "Ultraviolet-Visible Spectrophotometry." In Principles of Forensic Toxicology. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42917-1_10.

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Gordon, M. H., and R. Macrae. "UV—visible spectrophotometry." In Instrumental Analysis in the Biological Sciences. Springer US, 1987. http://dx.doi.org/10.1007/978-1-4684-1521-6_6.

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Amekura, Hiro. "Ultraviolet–Visible Spectrophotometry." In Compendium of Surface and Interface Analysis. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-6156-1_126.

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Bruno, Thomas J., and Paris D. N. Svoronos. "Ultraviolet and Visible Spectrophotometry." In CRC Handbook of Basic Tables for Chemical Analysis. CRC Press, 2020. http://dx.doi.org/10.1201/b22281-8.

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Zijlstra, Willem G., Anneke Buursma, and Onno W. van Assendelft. "Spectrophotometry." In Visible and Near Infrared Absorption Spectra of Human and Animal Haemoglobin. CRC Press, 2021. http://dx.doi.org/10.1201/9780429071096-3.

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Bozhynov, Vladyslav, Pavel Soucek, Antonin Barta, Pavla Urbanova, and Dinara Bekkozhayeva. "Visible Aquaphotomics Spectrophotometry for Aquaculture Systems." In Bioinformatics and Biomedical Engineering. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78723-7_9.

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Singh, Daya B., Iain Bain, and David K. Harrison. "Use of Visible Spectrophotometry to Assess Tissue Oxygenation in the Colostomy Stoma." In Advances in Experimental Medicine and Biology. Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-1241-1_39.

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Conference papers on the topic "Visible spectrophotometric"

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Gavat, Cristian-Catalin, and Afrodita Doina Marculescu. "New Visible Quantitative Spectrophotometric Determination of Zolpidem from Tablets. Regression Statistics Analysis." In 2024 E-Health and Bioengineering Conference (EHB). IEEE, 2024. https://doi.org/10.1109/ehb64556.2024.10805648.

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Sousa, I., A. Kuznetsova, T. Galvão, et al. "The Use of Nanostructured Materials Loaded with pH Indicating Molecules for Corrosion Sensing." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09666.

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Abstract In this work we report the synthesis of different materials for immobilization of well-known pH indicators, to be used as additives in coatings for corrosion sensing: inorganic materials such as layered double hydroxides, silica nanocapsules and polymeric microcapsules (chitosan). The materials obtained were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopies. Furthermore, the release profile of the obtained materials was performed using UV-Visible spectrophotometry under conditions relevant for the onset of corrosion processes, namely in the presence of NaCl and different pH conditions. The release and color changes were correlated with pH maps obtained by the scanning ion-selective technique for different galvanic couples (Al-Cu, Fe-Zn) and magnesium alloy AZ31. The results show that the materials obtained are able to change color, associated with the pKa of selected indicators and ascribed to pH changes in the alkaline direction as result of cathodic activity in different metals. These findings open prospects for the use of the prepared additives in functional coatings for corrosion sensing.

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Guo Lei. "Visible spectrophotometric determination of total flavonoids in Buddleja officinalis Maxim." In 2011 International Conference on New Technology of Agricultural Engineering (ICAE). IEEE, 2011. http://dx.doi.org/10.1109/icae.2011.5943985.

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Gavat, Cristian Catalin, and Afrodita Doina Marculescu. "Method Development for Visible Spectrophotometric Analysis of Ibuprofen in Pharmaceuticals." In 2021 International Conference on e-Health and Bioengineering (EHB). IEEE, 2021. http://dx.doi.org/10.1109/ehb52898.2021.9657746.

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Aspnes, D. E. "Characterization of Materials by Visible-Near UV Spectrophotometric and Spectroellipsometric Techniques." In Lasers in Material Diagnostics. Optica Publishing Group, 1987. http://dx.doi.org/10.1364/lmd.1987.wf1.

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The primary advantages of optical measurements are that they are general, convenient, nondestructive, and can yield information about dynamic systems or processes in real time and in any transparent ambient. No special sample requirements are needed other than a reflecting surface, and measurements can be made with the sample in air or in atmospheric-pressure ambients. Nondestructiveness is obviously important for the analysis of unstable materials systems such as interfaces buried under oxide overlayers, while real-time capabilities suggest useful applications in process control. A final advantage is that optical probes offer unsurpassed energy resolution, important for accurately determining compositions of semiconductor alloys.

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Anthony, S. R., and M. K. Ramasubramanian. "Visible/Near-Infrared Spectrophotometric Blood Typing Sensor for Automated Near-Patient Testing." In 2005 IEEE Engineering in Medicine and Biology 27th Annual Conference. IEEE, 2005. http://dx.doi.org/10.1109/iembs.2005.1616842.

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Mulyono, Tri, Asnawati, and Ainul Avida. "Sequential injection analysis (SIA) for determination of sulfide ion using visible spectrophotometric detection." In II INTERNATIONAL SCIENTIFIC AND PRACTICAL SYMPOSIUM “MATERIALS SCIENCE AND TECHNOLOGY” (MST-II-2022). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0131500.

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Chaithong, Ronnakrit, Wannapong Triampo, Pongpatai Kitrungloadjanaporn, and Darapond Triampo. "UV-Visible Spectrophotometric Inquiry-Based Learning via STEM CAMP: Imitation of Syrup Drinks." In 2021 6th International STEM Education Conference (iSTEM-Ed). IEEE, 2021. http://dx.doi.org/10.1109/istem-ed52129.2021.9625151.

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Saleem, Basima A. A., Afyaa M. Yonus, and Najih H. Shekho. "Visible spectrophotometric method for quantitative estimation of atenolol drug using cerium (III and IV)." In 3RD INTERNATIONAL CONFERENCE ON ENERGY AND POWER, ICEP2021. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0107688.

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A. YOUNIS, Shahla, Basima A. A. SALEEM, Ali Khudheyer OBAYES, and Ghassan Q. ISMAIL. "VISIBLE QUANTITATIVE ASSAY OF PEPCID IN PHARMACEUTICAL DOSAGE FORMS VIA SAFRANIN REAGENT." In IV.International Scientific Congress of Pure,Appliedand Technological Sciences. Rimar Academy, 2022. http://dx.doi.org/10.47832/minarcongress4-13.

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Due to the medical importance of Pepcid, a spectrophotometric method had been suggested for the determination of Pepcid in its pure form as well as in some of its pharmaceutical preparations. The proposed method relies on two important steps; the first one, is the oxidation-reduction reaction between Pepcid and an amount of cerium IV (oxidizing agent) in presence of acidic medium, followed by the second step that occurs between cerium (III) with safranin, at the selected wavelength 514 nm. The proposed method obeyed Beer's law within the range (2-40) µg.mL-1, with good sensitivity relative to the molar absorption coefficient value 3.21×104 l.mol-1.cm-1 and the Sandal value equal to 0.00105μg.cm-2. The proposed method has been successfully applied to quantify Pepcid in pure form and its pharmaceutical preparations

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Reports on the topic "Visible spectrophotometric"

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Sopok, Samuel. Determination of Trivalent Chromium Ions in Chromium Plating Solutions by Ultraviolet-Visible Spectrophotometry. Defense Technical Information Center, 1989. http://dx.doi.org/10.21236/ada215688.

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