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Journal articles on the topic 'Molecular spectrophotometry'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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1

Kurdaikar, S. S., A. Fernandes, S. V. Gandhi, P. Pattewar, and A. A. Mahajan. "Spectrophotometric Determination of Carbimazole and Its Major Impurity, Degradation Product and Metabolite: Methimazole -=SUP=-*-=/SUP=-." Оптика и спектроскопия 129, no. 7 (2021): 972. http://dx.doi.org/10.21883/os.2021.07.51090.1046-21.

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The present research work was carried out in order to develop simple, accurate and precise UV sprctrophotometric methods having comparable sensitivity as that of sophisticated chromatographic techniques. Two methods were developed namely first derivative spectrophotometry and ratio spectra derivative spectrophotometry for accurate determination of specified impurity methimazole (imp A) in presence of drug carbimazole. First derivative spectrophotometric method involves recording of zero order spectra of both the drugs carbimazole and methimazole and its mixture in the range of 200-400 nm and s
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2

I., Stoicescu. "Manganese determination in coastal water." Scientific Bulletin of Naval Academy XXI, no. 2 (2018): 185–89. http://dx.doi.org/10.21279/1454-864x-18-i2-023.

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The present work describes the application of spectrophotometric method for the determination of manganese (Mn) used in water samples collected from the coastal zone of the Black Sea. We studied a colorimetric method for the determination of manganese using UVVIS molecular absorption spectrophotometry. We measure absorbance of the 450 nm charge transfer band of permanganate. In all analysed samples we found that the levels of manganese did not exceed the pollution threshold.
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3

Dorraji, Parisa S., and Fahimeh Jalali. "Spectral, electrochemical, and molecular docking evaluation of the interaction of the anti-hyperthyroid drug methimazole with DNA." Canadian Journal of Chemistry 93, no. 10 (2015): 1132–39. http://dx.doi.org/10.1139/cjc-2014-0594.

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The interaction of native calf thymus DNA with the anti-hyperthyroid drug methimazole was investigated by different spectroscopic (UV-Vis spectrophotometry, spectroflourimetry, and circular dichroism), electrochemical (cyclic voltammetry and chronoamperometry) methods, and molecular docking calculations. The binding constant (Kb) obtained from the spectrophotometric method was 9.67 × 103 L mol−1, comparable with that of groove binding molecules. The binding mode was further investigated by following the competition between Hoechst 33258 and methimazole for DNA grooves by spectrofluorimetry. Co
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4

Forbes, Patricia B. C., and Johan A. Nöthling. "Shedding light on spectrophotometry: The SpecUP educational spectrophotometer." South African Journal of Science 110, no. 1/2 (2014): 1–5. http://dx.doi.org/10.1590/sajs.2014/20130096.

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5

Journal, Baghdad Science. "Derivative Zero - Crossing Spectrophotometry Of Binary Mixtures Of Acetyl Acetonates Of Micro – Amounts Of Mn (Ii) And Al (Iii)." Baghdad Science Journal 10, no. 3 (2013): 866–82. http://dx.doi.org/10.21123/bsj.10.3.866-882.

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New derivative molecular absorption spectrophotometric methods have been developed for the determination of Al (III) , Mn (II) , individually and binary mixtures . The aim of this model of study is to obtain analytical results characterized by adequate standard of analytical figures of merits through application of derivative Spectrophotometry (dnA/d?n). The two metals acetyl acetonates are chemically stable and are widely used as catalysts . Where Interferences are probable due to very close or nearby peaks or Summits, the Zero – Crossing derivative measurement technique is used to avoid inte
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6

Basheer, Hassan M., Fathil Jasim, and Mohammed A. Al Hammed. "Derivative Zero - Crossing Spectrophotometry Of Binary Mixtures Of Acetyl Acetonates Of Micro – Amounts Of Mn (Ii) And Al (Iii)." Baghdad Science Journal 10, no. 3 (2013): 866–82. http://dx.doi.org/10.21123/bsj.2013.10.3.866-882.

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New derivative molecular absorption spectrophotometric methods have been developed for the determination of Al (III) , Mn (II) , individually and binary mixtures . The aim of this model of study is to obtain analytical results characterized by adequate standard of analytical figures of merits through application of derivative Spectrophotometry (dnA/d?n). The two metals acetyl acetonates are chemically stable and are widely used as catalysts . Where Interferences are probable due to very close or nearby peaks or Summits, the Zero – Crossing derivative measurement technique is used to avoid inte
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7

Rachmawati, Yuanita, and Romyun Alvy Khoiriyah. "Comparison of DNA Isolation Results with Simple Methods and Kits in Samples of Psidium guajava Leaves." Biotropic : The Journal of Tropical Biology 2, no. 2 (2018): 93–99. http://dx.doi.org/10.29080/biotropic.2018.2.2.93-99.

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DNA isolation is one of a series of methods that must be carried out on the basic techniques of Molecular Biology Analysis. Especially PCR-based molecular marking techniques. Many ways are done in DNA isolation. This study discusses the comparison of the results of DNA isolation using two methods. Simple DNA isolation methods and using Kit. Samples of Psidium guajava leaves used were taken from 15 different locations used. In general, DNA isolation methods include three steps, namely destruction, precipitation, and purification. Simple DNA isolation is done with detergents, alcohol groups, whi
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8

Wahauwouele Hermann, Coulibaly, Bouatenin Koffi Maizan Jean-Paul, Kouame Kohi Alfred, Amoikon Tiemele Laurent Simon, Sanogo Yahya Maimouna, and Akissi Dogbo Marius. "TECHNICAL SHEET OF COMPARATIVE STUDY OF TWO TECHNIQUES CONTROL OF DNA FROM YEAST ISOLATES PRODUCING PECTINASE." International Journal of Advanced Research 8, no. 9 (2020): 979–83. http://dx.doi.org/10.21474/ijar01/11751.

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Polymerase Chain Reaction (PCR) is a widely used technique in the field of molecular biology to rapidly make very large number of copies of a specific DNA sample for detailed studies. The success of the technique however is dependent on the on the quality, i.e purity of the extracted DNA specimen. The aim of this study was to evaluate the quality of extracted DNA from pectinase producing yeast to determine the suitability of the extraction method to produce pure extract without non-inhibiting substances.In this study, DNA extracts from six (06) isolates of pectinase-producing yeasts were quant
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9

Alvarado-Lorenzo, Alfonso, Laura Criado-Pérez, Mónica Cano-Rosás, Eva Lozano-García, Juan López-Palafox, and Mario Alvarado-Lorenzo. "Clinical Comparative Study of Shade Measurement Using Two Methods: Dental Guides and Spectrophotometry." Biomedicines 12, no. 4 (2024): 825. http://dx.doi.org/10.3390/biomedicines12040825.

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Tooth color is a determining factor in the fabrication of dental prostheses. The aim of the present study is to compare two measurement methods used in the field of dentistry: dental guides and spectrophotometry. A total of 2768 natural teeth were measured using the Vita Classical and Vita 3D-Master dental guides (Vita-Zahnfabrik, Bad Säckingen, Germany), as well as a Vita Easyshade Compact spectrophotometer (Vita-Zahnfabrik). The measurements were carried out by one operator under suitable illumination conditions at 5500 degrees Kelvin. The obtained results show that the measurements obtained
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10

Gans, P. "Derivative spectrophotometry." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 51, no. 14 (1995): 2593–94. http://dx.doi.org/10.1016/0584-8539(95)90063-2.

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11

Roales, Javier, Francisco G. Moscoso, Alejandro P. Vargas, Tânia Lopes-Costa, and José M. Pedrosa. "Colorimetric Gas Detection Using Molecular Devices and an RGB Sensor." Chemosensors 11, no. 2 (2023): 92. http://dx.doi.org/10.3390/chemosensors11020092.

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Spectrophotometry and colorimetry are among the most-used techniques for chemical and biological analyses, but the required equipment is often expensive and restricted to laboratory use. We present here a low-cost and portable color measuring device that can provide similar results to laboratory spectrophotometers in color measuring applications. Our prototype was based on an RGB color sensor interfaced to a Raspberry Pi and mounted on custom sample holders with a dual illumination source for reflectance or transmittance measurements. To evaluate its capabilities for the detection of gases, we
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12

Tanasale, Matheis F. J. D. P., Ivonne Telussa, and Serly J. Sekewael. "Ekstraksi Dan Karakterisasi Kitosan Dari Kulit Udang Windu (Penaeus monodon) Serta Proses Depolimerisasi Kitosan Dengan Hidrogen Peroksida Berdasarkan Variasi Suhu Pemanasan." Indonesian Journal of Chemical Research 3, no. 2 (2016): 308–18. http://dx.doi.org/10.30598/ijcr.2016.3-mat.

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An extraction of chitin from shell of the tiger shrimp (Penaeus monodon), a convertion chitin into chitosan and depolymerization chitosan into oligochitosan using hydrogen peroxide based on variations in heating temperature have been done. Chitosan had depolymerized and it’s molecular weight had tested by end group analysis method and it’s degree of deacetylation had tested by UV-Vis spectrophotometry method. Oligochitosan had obtained from the conversion of chitin is isolated from the shell of tiger shrimp and from commercial chitin. The content of chitin obtained in tiger shrimp shells w
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13

Chebotarev, Alexandr N., Denys V. Snigur, and Kateryna V. Bevziuk. "STUDY OF PROTOLYTIC EQUILIBRIA IN SOLUTIONS OF HYDROXYANTHRAQUINONE DYES BY CHEMICAL CHROMATICITY METHOD." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 3 (2017): 22. http://dx.doi.org/10.6060/tcct.2017603.5418.

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In this paper, the acid-base properties of hydroxyanthraquinone dyes-alizarin, alizarin red S and alizarin-complexone- were studied in aqueous solutions by chemical chromaticity and spectrophotometry methods. The advantages of chemical chromaticity method over UV-VIS spectrophotometry method were shown in the protolytic equilibria study in dyes solutions. The chemical chromaticity method, unlike spectrophotometry, can determine the deprotonation constant of sulfo group of alizarin red S. Using the chromaticity functions data it is possible to determine all ionization constant of these hydroxya
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14

Maczka, Paulina, Anna Gumieniczek, Justyna Galeza, and Rafal Pietras. "Zero crossing and ratio spectra derivative spectrophotometry for the dissolution tests of amlodipine and perindopril in their fixed dose formulations." Current Issues in Pharmacy and Medical Sciences 27, no. 2 (2014): 113–17. http://dx.doi.org/10.2478/cipms-2014-0027.

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Abstract Dissolution tests of amlodipine and perindopril from their fixed dose formulations were performed in 900 mL of phosphate buffer of pH 5.5 at 37°C using the paddle apparatus. Then, two simple and rapid derivative spectrophotometric methods were used for the quantitative measurements of amlodipine and perindopril. The first method was zero crossing first derivative spectrophotometry in which measuring of amplitudes at 253 nm for amlodipine and 229 nm for perindopril were used. The second method was ratio derivative spectrophotometry in which spectra of amlodipine over the linearity rang
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15

Vershinina, Yulia S., Ilya V. Mitin, Andrey V. Garmay, Gleb K. Sugakov, and Irina A. Veselova. "Simple and Robust Approach for Determination of Total Protein Content in Plant Samples." Foods 14, no. 3 (2025): 358. https://doi.org/10.3390/foods14030358.

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The determination of total protein in plant samples is a difficult task, as classical nitrogen-based methods are not selective for the nature of nitrogen, and the results of biochemical methods are influenced by both associated compounds and the complex composition of the protein matrix. Using electrophoretic separation of three commercial sunflower protein samples, it was determined that the studied proteins are a mixture of salt-soluble globulins and water-soluble albumins of different molecular weights. The total protein content of the studied samples was determined using five spectrophotom
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16

Salganicoff, Leon. "Near-infrared spectrophotometry." BioFactors 7, no. 3 (1998): 239–42. http://dx.doi.org/10.1002/biof.5520070317.

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17

Fabiyi, Festus Sunday, and Adesoji Alani Olanrewaju. "Synthesis, Characterization, Thermogravimetric and Antioxidant Studies of New Cu(II), Fe(II), Mn(II), Cu(II), Zn(II), Co(II) and Ni(II) Complexes with Benzoic Acid and 4,4,4-Trifluoro-1-(2-naphthyl)-1,3-butanedione." International Journal of Chemistry 11, no. 1 (2019): 60. http://dx.doi.org/10.5539/ijc.v11n1p60.

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Six new Mn(II), Fe(II), Co(II), Ni (II), Cu(II) and Zn(II) complexes with benzoic acid (L) and 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione (L1), of the molecular formulae [MnLL1]·H2O (1), [FeLL1]·H2O (2), [CoLL1] (3), [NiLL1]·H2O (4), [CuLL1] (5) and [ZnLL1] (6), respectively, have been synthesized. The molecular structures of the complexes were determined by spectrophotometric studies using ir, 1H and 13C nmr, es and mass spectrophotometry revealed that the geometries of the complexes 1, 2, 3, and 6 are tetrahedral, while 4 and 5 have square planar geometry
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18

Chou, Chiu L., John F. Uthe, and Robert D. Guy. "Determination of Free and Bound Cd, Zn, Cu, and Ag Ions in Lobster (Homarus americanus) Digestive Gland Extracts by Gel Chromatography Followed by Atomic Absorption Spectrophotometry and Polarography." Journal of AOAC INTERNATIONAL 76, no. 4 (1993): 794–98. http://dx.doi.org/10.1093/jaoac/76.4.794.

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Abstract Gel-permeation chromatography followed by atomic absorption spectrophotometric and polarographic analyses were used to measure free and bound divalent metal ions in lobster digestive gland extracts prepared with or without oc-toluenesulfonyl fluoride, a protease inhibitor. Chromatography on Sephadex G-50 or G-100 yielded 3 UV-absorbing peaks, which corresponded, respectively, to the void volume, a medium molecular weight fraction, and a low molecular weight fraction that contained free divalent metal ions. In protease-inhibited extracts, only Zn+2 was found, whereas Cd, Cu, and Ag wer
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19

Tong, Liuchuan, Qing Chen, Andrew A. Wong, et al. "UV-Vis spectrophotometry of quinone flow battery electrolyte for in situ monitoring and improved electrochemical modeling of potential and quinhydrone formation." Physical Chemistry Chemical Physics 19, no. 47 (2017): 31684–91. http://dx.doi.org/10.1039/c7cp05881k.

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20

Yang, Ming, Qian Sun, and Cai Yun Li. "Preparation and Characterization of Molecularly Imprinted Polymer Microspheres of p-Nitroaniline." Applied Mechanics and Materials 71-78 (July 2011): 3411–14. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.3411.

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Polystyrene microspheres were prepared by the emulsifier-free polymerization method. Using the polystyrene microspheres as seeds, p-nitroaniline as template molecules, the monodispersed molecularly imprinted polymer microspheres (MIPMs) were prepared by a single-step swelling and polymerization method. The monodispersed molecular imprinted polymers with porous structure were characterized by SEM, and UV-visible spectrophotometry. The adsorption performance of MIPMs for p-nitroaniline was investigated.
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21

Yang, Ming, Juan Juan Xia, and Kai Guan. "Preparation and Characterization of Molecularly Imprinted Polymer Microspheres of 2,4-Dichlorophenoxyacetic Acid." Applied Mechanics and Materials 333-335 (July 2013): 1816–19. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.1816.

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Polystyrene microspheres were prepared by the emulsifier-free polymerization method. Using the polystyrene microspheres as seeds, 2,4-dichlorophenoxyacetic acid as template molecules, the monodispersed molecularly imprinted polymer microspheres (MIPMs) were prepared by a single-step swelling and polymerization method. The monodispersed molecular imprinted polymers with porous structure were characterized by SEM, and UV-visible spectrophotometry. The adsorption performance of MIPMs for 2,4-dichlorophenoxyacetic acid was investigated.
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22

Thompson, Ian A., Don M. Huber, and Darrell G. Schulze. "Evidence of a Multicopper Oxidase in Mn Oxidation by Gaeumannomyces graminis var. tritici." Phytopathology® 96, no. 2 (2006): 130–36. http://dx.doi.org/10.1094/phyto-96-0130.

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Manganese (Mn) oxidation by the plant-pathogenic fungus Gaeumannomyces graminis var. tritici has been correlated with virulence in take-all disease. The mechanism of Mn oxidation has not, however, been investigated adequately. Research on bacteria and other fungi indicates that Mn oxidation is most often the result of the activity of multicopper oxidases. To determine if G. graminis var. tritici oxidizes Mn by similar means, the Mn oxidizing factor (MOF) produced by G. graminis var. tritici was characterized by cultural, spectrophotometric, and cellulose acetate electrophoresis methods. Based
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23

Dortet, Laurent, Ludivine Bréchard, Gaëlle Cuzon, Laurent Poirel, and Patrice Nordmann. "Strategy for Rapid Detection of Carbapenemase-Producing Enterobacteriaceae." Antimicrobial Agents and Chemotherapy 58, no. 4 (2014): 2441–45. http://dx.doi.org/10.1128/aac.01239-13.

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ABSTRACTA prospective survey was conducted on 862Enterobacteriaceaeisolates with reduced susceptibility to carbapenems. The Carba NP test, UV spectrophotometry, and a DNA microarray were used to detect carbapenemase producers, and the results were compared to those from PCR and sequencing. The 172 carbapenemase producers were detected using the Carba NP test and UV spectrophotometry, whereas the DNA microarray failed to detect IMI producers. The use of the Carba NP test as a first screening, followed by the use of molecular techniques, has been determined to be an efficient strategy for identi
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24

Pulatova, L., and F. Jalilov. "DETERMINATION OF THE PRESENCE OF ANTIDEPRESSANTS IN THE BLOOD USING THE UV SPECTROPHOTOMETRY METHOD." Scientific heritage, no. 130 (February 7, 2024): 36–41. https://doi.org/10.5281/zenodo.10632025.

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The article shows that the use of molecular spectroscopy methods for forensic chemical research of biologicalobjects is based on the individuality of the absorption spectra of chemical compounds. The authors obtained resultsconfirming the suitability of the developed methods for determining antidepressants using UV spectrophotometry,isolated from various biological and plant objects. It has been established that the method of spectrophotometry inthe ultraviolet region makes it possible to conduct studies with fairly dilute solutions of substances studied duringforensic toxicological analysis (
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25

Lin, Sheng-Feng. "Optical Design of a Quantitative Microvolume Nucleic Acid Spectrophotometer with Non-Optical Fiber and All Radiation-Hardened Lens Elements." Photonics 9, no. 1 (2021): 5. http://dx.doi.org/10.3390/photonics9010005.

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The purity of the nucleic acid samples obtained by extraction/precipitation or adsorption chromatography must be verified with microvolume spectrophotometry to ensure a high success rate of the subsequent nucleic acid sequencing while exploring the trace rare nucleic acids in space exploration with in-situ life detection. This paper reports an optical design for a radiation-hardened quantitative microvolume spectrophotometer with all radiation-hardened lens elements for space exploration instruments by using a non-optical fiber optical path with radiation-hardened optical glass elements. The r
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26

Nersisyan, S. E., and R. Kh Oganesyan. "Spectrophotometry of carbon stars. III. Molecular absorption bands: Quantitative analysis." Astrophysics 24, no. 2 (1986): 142–49. http://dx.doi.org/10.1007/bf01025778.

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27

Guomin, Liu, Song Gengxin, and Zhou Xiaodong. "Spectral K-Ratio Spectrophotometry." Spectroscopy Letters 25, no. 4 (1992): 565–76. http://dx.doi.org/10.1080/00387019208021531.

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28

Granger, Jill Nelson. "Introducing Spectrophotometry in Grades 6–12 Using a College‐Based Spectrophotometer Loan Program." Spectroscopy Letters 37, no. 2 (2004): 159–71. http://dx.doi.org/10.1081/sl-120030851.

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Khan, Sulaiman, David Newport, and Stéphane Le Calvé. "Gas Detection Using Portable Deep-UV Absorption Spectrophotometry: A Review." Sensors 19, no. 23 (2019): 5210. http://dx.doi.org/10.3390/s19235210.

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Several gas molecules of environmental and domestic significance exhibit a strong deep-UV absorption. Therefore, a sensitive and a selective gas detector based on this unique molecular property (i.e., absorption at a specific wavelength) can be developed using deep-UV absorption spectrophotometry. UV absorption spectrometry provides a highly sensitive, reliable, self-referenced, and selective approach for gas sensing. This review article addresses the recent progress in the application of deep-UV absorption for gas sensing owing to its inherent features and tremendous potentials. Applications,
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Clavel, J., B. Schulz, B. Altieri та ін. "2.5–11.6 μ Spectrophotometry and Imaging of AGNs". Symposium - International Astronomical Union 194 (1999): 145–50. http://dx.doi.org/10.1017/s0074180900161881.

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We present low resolution spectrophotometric and imaging ISO observations of a sample of 58 AGN's over the 2.5–11.6 μ range. The data strongly support unification schemes and set new constraints on models of the molecular torus.
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31

Daryono, Budi Setiadi, Puti Hana Ramadhani, and Esty Nidianti. "Molecular characters of melon (Cucumis melo L. ‘Kinaya’) using inter simple sequence repeat." Biogenesis: Jurnal Ilmiah Biologi 9, no. 2 (2021): 118. http://dx.doi.org/10.24252/bio.v9i2.15997.

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Cultivar ‘Kinaya’ is a melon produced from breeding between ‘Sonya’ and ‘Kinanti’. This study on phenotypic and molecular characters is carried out to support ‘Kinaya’ as a superior cultivar. Our study aimed to analyze the genetic variation of the melon ‘Kinaya Bulat Kuning’ and ‘Kinaya Kuning Lonjong’ and its parental ‘Sonya’ and ‘Kinanti’. The research was conducted in the Greenhouse of Mutihan, D.I.Yogyakarta, and the Laboratory of Genetics and Breeding, Faculty of Biology, Universitas Gadjah Mada. Quantitative characters were determined by morphometric comparisons, fruit weights, and the n
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Travis, John C., Melody V. Smith, and Gary W. Kramer. "Optical Wedge Effects in Instruments and Standards for Molecular Absorption Spectrophotometry." Applied Spectroscopy 52, no. 11 (1998): 1414–24. http://dx.doi.org/10.1366/0003702981943040.

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Sommer, L., and G. Ackermann. "Quantitative characterization of procedures using ultraviolet and visible molecular absorption spectrophotometry." Pure and Applied Chemistry 58, no. 7 (1986): 1015–22. http://dx.doi.org/10.1351/pac198658071015.

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Zhebentyaev, A. I. "Spectrophotometry of phenothiazine in the form of molecular complexes with eosin." Pharmaceutical Chemistry Journal 19, no. 1 (1985): 75–77. http://dx.doi.org/10.1007/bf00767110.

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Bhaskar, P. Vijay, and A. Ramachandraiah. "SYNTHESIS, SPECTRAL AND MOLECULAR MODELING STUDIES OF COUMARIN DERIVATIVES." International Journal of Current Pharmaceutical Research 9, no. 3 (2017): 127. http://dx.doi.org/10.22159/ijcpr.2017.v9i3.19984.

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Objective: To synthesize the 3-{2-[N'-(1-Pyridin-2-yl-ethylidene)-hydrazino]-thiazol-4-yl} coumarins and study their spectral and molecular properties by using the spectroscopy and molecular modeling techniques.Methods: Spectroscopy and Molecular modeling techniquesResults: The spectral behavior of 3-{2-[N'-(1-Pyridin-2-yl-ethylidene)-hydrazino]-thiazol-4-yl} coumarins (1.1-1.3) in aqueous buffers of varied pH is presented. Spectrophotometry was utilized to study its proton and electron transfer characteristics with the support of molecular modeling studies. An excellent analytical method of a
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Shichida, Yoshinori, Yasushi Imamoto, Tôru Yoshizawa, et al. "Low-temperature spectrophotometry of phoborhodopsin." FEBS Letters 236, no. 2 (1988): 333–36. http://dx.doi.org/10.1016/0014-5793(88)80050-4.

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Kumar, P., and M. Pacha. "Assessment of Phenolic Compounds in the Surface Waters of Godavari Canal, Andhra Pradesh, India." Current World Environment 10, no. 1 (2015): 338–42. http://dx.doi.org/10.12944/cwe.10.1.43.

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The present study was intended to determine the concentrations of phenolic compounds in surface waters of Godavari canal by molecular spectrophotometry. Samples were collected from fifteen sampling stations using grab sampling method for a period of four months (from November to February) at 10 day intervals. Total phenols in water samples were determined using molecular spectrophotometry after distillation, complexation with 4-aminoantipyrine and extraction into chloroform. The concentration of phenolic compounds was reported in the range of 80-179 mg/lit, well within the limits considering t
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Trumbo, Toni A., Emeric Schultz, Michael G. Borland, and Michael Eugene Pugh. "Applied spectrophotometry: Analysis of a biochemical mixture." Biochemistry and Molecular Biology Education 41, no. 4 (2013): 242–50. http://dx.doi.org/10.1002/bmb.20694.

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39

Shaalan, Rasha Abdel Aziz. "Spectrofluorimetric and Spectrophotometric Determination of Pregabalin in Capsules and Urine Samples." International Journal of Biomedical Science 6, no. 3 (2010): 260–67. http://dx.doi.org/10.59566/ijbs.2010.6260.

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Three new, simple, sensitive and selective spectrofluorimetric and spectrophotometric methods were developed for the determination of the γ-amino-n-butyric acid derivative, pregabalin. Pregabalin as a primary amine reacts with fluorescamine to yield a fluorescent product (Method I), with 2,4-dinitrofluorobenzene (Method II) and 2,3,5,6-tetrachloro-1,4-benzoquinone (Method III) in aqueous alkaline buffered media to form colored products which could be measured spectrophotometrically. The optimum conditions for each reaction were ascertained and the methods were applied for the determination of
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40

Gupta, B. D. "Light Scattering Spectrophotometry And Its Applications." Journal of Optics 21, no. 2 (1992): 37–40. http://dx.doi.org/10.1007/bf03549703.

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41

Vilas, Faith, and Bradford A. Smith. "Coronagraph for astronomical imaging and spectrophotometry." Applied Optics 26, no. 4 (1987): 664. http://dx.doi.org/10.1364/ao.26.000664.

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Park, Man Ki, Jeong Hill Park, and Jung Hwan Cho. "Qualitative analysis by derivative spectrophotometry (II)." Archives of Pharmacal Research 12, no. 4 (1989): 289–94. http://dx.doi.org/10.1007/bf02911062.

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43

Amberg, David C., Daniel J. Burke, and Jeffrey N. Strathern. "Measuring Yeast Cell Density by Spectrophotometry." Cold Spring Harbor Protocols 2006, no. 1 (2006): pdb.prot4186. http://dx.doi.org/10.1101/pdb.prot4186.

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44

Park, Man Ki, and Jung Hwan Cho. "Quantitative analysis by derivative spectrophotometry (II)." Archives of Pharmacal Research 10, no. 1 (1987): 1–8. http://dx.doi.org/10.1007/bf02855613.

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45

B., N. Achar, and Bellappa S. "Evaluation of molecular weight and analytical assay of phenothiazine drugs." Journal of Indian Chemical Society Vol. 83, Jun 2011 (2006): 629–30. https://doi.org/10.5281/zenodo.5820187.

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Department of Studies in Chemistry, University of Mysore, Manasagangothri, Mysore-570 006, Karnataka, India E-mail : bnachar@yahoo.com <em>Manuscript received 15 September 2005, revised 17 March 2006, accepted 27 March 2006</em> Methods have been developed for the molecular weight determination and analytical assay of chlorpromazine hydrochloride (CPU), diethazine hydrochloride (DH), dioxopromethazine hydrochloride (DPH) and methiomeprazine hydrochloride (MMH). The methods are based on the formation of charge-transfer complexes of the above phenothiazine derivatives with picric acid (PA). The
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46

Yoss, Norma L., Octavian Popescu, Victor I. Pop, Dorin Porutiu, Fred A. Kummerow, and Gheorghe Benga. "Comparison of liposome entrapment parameters by optical and atomic absorption spectrophotometry." Bioscience Reports 5, no. 1 (1985): 1–5. http://dx.doi.org/10.1007/bf01117434.

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Methods for the complete characterization of liposomes prepared by ether-injection are described in detail. The validity of atomic absorption spectrophotometry Ior measuring markers of trapped volume was checked by comparative determinations of markers with established optical spectrophotometrical methods. The favorable results usingl atomic absorption spectrophotometry to quantitate the marker Mn2+ are of particular relevance as manganese ion is also the paramagnetic probe in n.m.r, measurements of water permeability of lipo-somes; our results indicate that in such measurements no other marke
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Szumilo, Michal, Piotr Belniak, Regina Kasperek-Nowakiewicz, Ewelina Holody, and Ewa Poleszak. "Comparative dissolution studies on granules with acetaminophen and caffeine using the basket and paddle methods with simultaneous spectrophotometric determination of active substances." Current Issues in Pharmacy and Medical Sciences 32, no. 4 (2019): 219–24. http://dx.doi.org/10.2478/cipms-2019-0037.

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Abstract Acetaminophen and caffeine, popular therapeutic substances used to relieve pain or alleviate the symptoms of cold. The aims of the study were the comparison of granules, in terms of dissolution rate and moreover the development of spectrophotometric method to the simultaneous determination of both active pharmaceutical ingredients (APIs) in granules. The granules were tested by two pharmacopoeial methods of dissolution for solid dosage forms, and the dissolution profiles for each formulation were compared. A method of simultaneous determination of two medicinal substances by the doubl
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Thompson, Bryant, Krisna C. Bhargava, Alexander T. Czaja, Bin Pan, Brian T. Samuelsen, and Noah Malmstadt. "Spectrophotometry in modular microfluidic architectures." Biomicrofluidics 13, no. 6 (2019): 064121. http://dx.doi.org/10.1063/1.5124303.

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Karpińska, Joanna, and Jolanta Szostak. "Determination of chlorprothixene and amitryptyline hydrochlorides by UV-derivative spectrophotometry and UV-solid-phase spectrophotometry." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 61, no. 5 (2005): 975–81. http://dx.doi.org/10.1016/j.saa.2004.05.012.

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50

Sukumar, Rugmini, Talasila Prasada Rao, and Alathur D. Damodaran. "Determination of trace amounts of praseodymium by third-derivative molecular absorption spectrophotometry." Analyst 113, no. 7 (1988): 1061. http://dx.doi.org/10.1039/an9881301061.

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