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Journal articles on the topic 'Beer-Lambert's law'

Author: Grafiati

Published: 6 June 2025

Last updated: 2 August 2025

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1

Michel, Erik, Andreas Entenmann, and Miriam Michel. "Pulse Spectrophotometric Determination of Plasma Bilirubin in Newborns." International Journal of Biomedical and Clinical Engineering 5, no. 1 (2016): 21–30. http://dx.doi.org/10.4018/ijbce.2016010103.

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In neonatal jaundice, plasma bilirubin has to be measured repeatedly in order to direct phototherapy. Invasive determination is standard. The authors delineate a concept for the non-invasive spectrophotometric determination of absolute plasma bilirubin concentration. By referencing the pulsatile spectrophotometric signal component of the metabolite of interest (MOI, here: bilirubin) to the pulsatile spectrophotometric signal component of a reference metabolite (MOR, here: water) of known plasma concentration, the absolute MOI concentration can be calculated. Based on Beer-Lambert's law and som

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AMINOTO, TOTO. "Identifikasi Sifat Selektifitas Jaringan Biologi pada Spektrum Near-Infrared dengan Citra menggunakan Hukum Beer-Lambert." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 12, no. 1 (2024): 23. http://dx.doi.org/10.26760/elkomika.v12i1.23.

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ABSTRAKSinar near-IR memiliki sifat selektifitas berupa koefisien atenuasi. Metode lain untuk melihat sifat selektifitas adalah menggunakan citra. Untuk menghasilkan citra tersebut digunakan fungsi ketebalan berdasarkan hukum Beer Lambert. Material yang digunakan adalah daging, kulit dan tulang dari ayam. Tujuan penelitian ini adalah menghasilkan citra berdasarkan fungsi ketebalan untuk mengetahui sifat selektifitas antara material. Hukum Beer Lambert menyatakan bahwa nilai intensitas akan teratenuasi tergantung dari fungsi eksponensial koefisien atenuasi dan ketebalannya. Dengan melinierkan p

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3

Dmello, Malissa. "Development and Validation by UV Spectrophotometric Method for Simultaneous Estimation of Gliclazide and Quercetin in Formulation." International Journal for Research in Applied Science and Engineering Technology 11, no. 6 (2023): 1282–87. http://dx.doi.org/10.22214/ijraset.2023.53759.

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Abstract: A simple, quick, accurate, precise, and cost-effective spectrophotometric approach for simultaneous estimation of Gliclazide and Quercetin has been developed by Simultaneous equation method. Gliclazide and Quercetin shows absorbance maximum at 226 and 255 nm respectively, as a result absorbance was measured at these wavelengths for the estimation of Gliclazide and Quercetin. In concentration ranges from 2-18 g/ml, and 2-22 g/ml for Gliclazide and Quercetin respectively followed Beer-Lambert's law. The method has been developed and validated in accordance with ICH recommendations and

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Kajal, A. Choursiya*1 Sachin M. Nikam2 Khanderao R. Jadhav3 Rishikesh S. Bachhav4. "Formulation Development And Evaluation Of Gastroretentive Floating Tablets Of Clopidogrel Bisulfate." International Journal in Pharmaceutical Sciences 2, no. 4 (2024): 1–25. https://doi.org/10.5281/zenodo.10903356.

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Gastroretentive floating tablets of clopidogrel bisulfate were prepared by direct compression method using HPMC K100M, Xanthan gum and mixture of other excipients. The drug content of tablets was found to be in between 100.08 0.92101.64 0.87 %. The in vitro dissolution studies of the prepared floating tablets were carried out on USP-I dissolution apparatus using Basket. It was observed that the formulations showed good linearity (r2 = 0.999) over the range of 0-30g/ml in 0.1N HCl. The IR spectra of drug and various polymers were recorded in combination with each other. The pH and solubility of

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Kaur, Bhupinder. "Analytical Determination of Imiquimod in Various Solvents by UV SpectroscopicalTechnique." Der Pharma Chemica 14, no. 9 (2022): 4. https://doi.org/10.4172/0975-413X.14.9.24-27.

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UV spectrophotometric method is the promising method which is developed for the programmed approximation of Imiquimod in bulk drug and different delivery systems. The absorption maxima of drug is shown at 244 nm and molar absortivity of 1.5899 ×104 l/mol×cm. Drug completely obeyed Beer-Lambert’s law within the concentration range of 0-2.5μg/ml. Correlation coefficients (R2) was found to be 0.998, 0.999. 0.999 in 0.1N HCl, Phosphate buffer pH 6.8 and methanol respectively.

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El-Kommos, Michael E., Samia M. El-Gizawy, Noha N. Atia, and Noha M. Hosny. "Spectrophotometric Determination of Some Non-Sedating Antihistamines Using Erythrosine B." ISRN Analytical Chemistry 2013 (June 2, 2013): 1–9. http://dx.doi.org/10.1155/2013/209518.

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A simple and sensitive spectrophotometric method has been developed for the determination of cetirizine (I), ebastine (II), fexofenadine (III), ketotifen (IV), and loratadine (V) based on ion-pair complex formation with erythrosine B. The pink color of the produced complex was measured at 550 nm without solvent extraction. Appropriate conditions were established by studying the color reaction between erythrosine B and the studied drugs to obtain the maximum sensitivity. Beer-Lambert's law is obeyed in the concentration ranges 1–7, 1–8, and 1–6 g/mL for (I, IV), (II, III), and (V), respectively

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Ismail, Muhammad. "Spectrophotometric and Spectrofluorimetric Quantification of Urea via Silver Nanoparticles Prepared by Wet Chemical Method." Catalysis Research 03, no. 01 (2023): 1–16. http://dx.doi.org/10.21926/cr.2301014.

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Silver nanoparticles have been utilized in an easy, sensitive, and effective approach through spectrophotometry and spectrofluorimetry to quantify urea in water samples. Here, 1,3-di-(1H-imidazole-1-yl) -2-propanol (DIPO) was employed to stabilize Ag NPs produced from the reduction of aqueous silver nitrate by sodium borohydride (NaBH<sub>4</sub>). Beer-Lambert's law was applied for determination using the complexation of Ag NPs with urea molecules. The results show urea can be assessed concurrently with good results and percent recoveries. The UV-visible absorbance and fluorescenc

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Maraie, Nidhal K., and Mohammed J. Neamah. "newly modified HPLC method for estimation of dutasteride in prepared niosomes." Al Mustansiriyah Journal of Pharmaceutical Sciences 17, no. 2 (2018): 8. http://dx.doi.org/10.32947/ajps.v17i2.50.

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A modify, fast, accurate and precise HPLC conditions were developed and validated for the determination of dutasteride (DT) in niosomes derived from proniosomal gel. The work has shown enough isolation for DT from other contents of the niosomes. The isolation of DT was achieved on C18 column (3μm, 125 × 4.6 mm). The mobile phase was a mixture of acetonitrile: water in a ratio of (50:50) and the flow rate was 1.5 mL per minute. The wave length used to detect dutasteride was 210 nm and the ejection volume was 100 μL. The calibration curve of concentrations range from 50 to 0.3 μg/mL obeys Beer-L

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West, Bradley M., Michael Stuckelberger, April Jeffries, et al. "X-ray fluorescence at nanoscale resolution for multicomponent layered structures: a solar cell case study." Journal of Synchrotron Radiation 24, no. 1 (2017): 288–95. http://dx.doi.org/10.1107/s1600577516015721.

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The study of a multilayered and multicomponent system by spatially resolved X-ray fluorescence microscopy poses unique challenges in achieving accurate quantification of elemental distributions. This is particularly true for the quantification of materials with high X-ray attenuation coefficients, depth-dependent composition variations and thickness variations. A widely applicable procedure for use after spectrum fitting and quantification is described. This procedure corrects the elemental distribution from the measured fluorescence signal, taking into account attenuation of the incident beam

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Nagabhushan, N. M., B. R. Kerur, M. T. Lagare та ін. "Technique for measurement of photon intensity for the determination of μm in the low photon energy region". Journal of X-Ray Science and Technology: Clinical Applications of Diagnosis and Therapeutics 12, № 3 (2004): 161–68. http://dx.doi.org/10.3233/xst-2004-00109.

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A new and accurate method to determine the mass attenuation coefficient, μm, for low photon energy employing NaI(Tl) X-ray detector and radioactive source is described. Effect of size of collimator and the selection of width of photopeak for integration on the contribution from scattered photons to the transmitted intensity is studied systematically and optimum size of collimator and photopeak limits for integration are established. With a 6 mm diameter collimator and FWHM for photopeak limits it was found that Beer-Lambert's law was rigorously valid over transmission range of 50–2%. Using thi

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Lebron, G. B., and T. L. Tan. "Integrated Band Intensities of Ethylene (C212H4) by Fourier Transform Infrared Spectroscopy." International Journal of Spectroscopy 2012 (August 28, 2012): 1–5. http://dx.doi.org/10.1155/2012/474639.

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The integrated band intensities of ethylene (12C2H4) in the 640–3260 cm−1 region were determined by Fourier transform infrared (FTIR) spectroscopy. The infrared absorbance spectra of the ν7 and ν10, ν12, ν7+ν8, ν6+ν10, v11, and ν9 and ν2+ν12 bands of ethylene recorded at a resolution of 0.5 cm−1 were measured at an ambient temperature of 296 K at various vapor pressures ranging from 3×10−5 to 1×10−3 atm to obtain respective Beer-Lambert's law plots. The measured integrated band intensities in cm−1/cm atm were S(ν9andν2+ν12)=112.20±0.24, S(ν11)=55.35±0.14, S(ν12)=41.22±0.30, and S(ν7andν10)=328

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Swain, Debasis, Varun K. Singh, Narra V. Krishna, L. Giribabu, and S. Venugopal Rao. "Optical, electrochemical, third-order nonlinear optical, and excited state dynamics studies of thio-zinc phthalocyanine." Journal of Porphyrins and Phthalocyanines 18, no. 04 (2014): 305–15. http://dx.doi.org/10.1142/s1088424614500035.

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Zinc phthalocyanine with S-aryl groups at α-positions have been synthesized and its optical, emission, electrochemical and third-order nonlinear optical properties were investigated. Both the Soret and Q-bands were red-shifted and obeyed Beer–Lambert's law. Electrochemical properties indicated that both oxidation and reduction processes were ring centered. Emission spectra were recorded in different solvents and the fluorescence yields obtained were in the range of 0.02 while time-resolved fluorescence data revealed lifetimes of typically few ns. Excited state dynamics in this novel thio-zinc

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13

Trioclarise, Rovika, Toto Aminoto, Yoni Rutiana Kusumawati, and Ratu Karel Lina. "Monte Carlo Probability To Determine Attenuation Coefficient In Identifying The Selectivity Properties Of Near-Infrared-Based Materials." Protek : Jurnal Ilmiah Teknik Elektro 11, no. 3 (2024): 195–99. http://dx.doi.org/10.33387/protk.v11i3.7717.

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Accurate attenuation coefficient measurements are able to display the nature of selectivity in an image. The methods used to measure the attenuation coefficient are Monte Carlo probability and linear regression models. This attenuation coefficient will appear if an image is taken in transmit mode. Selectivity properties are characterized by contrast ratios between different materials. In this transmission mode, if a near-infrared beam with a different wavelength is passed, it will produce different intensity values depending on the type of wavelength. According to Beer-Lambert's law, the inten

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Naveen V M K та Veeraswami B. "Highly accurate and New approach for quantiϐication of Gramicidin in medication by RP-HPLC". International Journal of Research in Pharmaceutical Sciences 11, SPL4 (2020): 3053–58. http://dx.doi.org/10.26452/ijrps.v11ispl4.4605.

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A significant Reverse Phase-High performance Liquid Chromatography technique was developed for a more accurate, unique and quick economical method was developed for the analysis of Gramicidin in medication dosage forms. The separation of this drug Gramicidin was done by using the X-Bridge phenyl column as a stationary phase, and a mixture of acetonitrile + buffer in 50:50 v/v ratio was used as a movable phase. The buffer used in this method was Octane sulphonic acid of pH-2.5 adjusted with OPA. The maximum absorbance of eluents was observed at 235 nm. A specific flow rate (1 ml/minute) was mai

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El-Kommos, Michael E., Niveen A. Mohamed, and Ahmed F. Abdel Hakiem. "Extractive Spectrophotometric Determination of Some Nonsteroidal Anti-Inflammatory Drugs Using Methylene Blue." Journal of AOAC INTERNATIONAL 96, no. 4 (2013): 737–44. http://dx.doi.org/10.5740/jaoacint.11-021.

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Abstract A simple, rapid, sensitive, and accurate extractive spectrophotometric method has been developed for the determination of seven nonsteroidal anti-inflammatory drugs (NSAIDs)—namely diclofenac sodium, ibuprofen, indomethacin, ketoprofen, ketorolac tromethamine, mefenamic acid, and naproxen—in pure forms as well as their pharmaceutical dosage forms (tablets, capsules, effervescent granules, syrups, oral drops, ampules, eye drops, gels, and suppositories). The method depends on the formation of an intensely colored ion-pair complex between the acidic drug and methylene blue in alkaline m

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Shuja, S. Z., B. S. Yilbas, and Z. Ayar. "Laser pulse heating and phase change process: A comparison of volumetric heat source models." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 8 (2009): 1697–706. http://dx.doi.org/10.1243/09544062jmes1730.

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In the laser heating process, irradiated energy is absorbed on the surface skin of the substrate material. This results in excess computational efforts due to grid arrangement in the irradiated region and the remaining region in the solution domain due to the fine grid spacing in the irradiated region. However, consideration of the surface heat source minimizes this problem, since it does not require fine grid spacing in the skin of the surface. In the present study, laser heating and phase change in the irradiated region are modelled. The laser heating situation is modelled after considering

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Ogira, Johnson O., P. O. Odumosu, and J. O. Onah. "Synthesis of Polymer Conjugates of Efavirenz, Tenofovir and Dolutegravir." Nigerian Journal of Pharmacy 59, no. 1 (2025): 252–63. https://doi.org/10.51412/psnnjp.2025.24.

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Background and purpose: Chitosan and alginate are examples of biodegradable polymers which have the advantage of controlled drug delivery, prevent overdose and toxicity. The aim of the study is to synthesize the three anti-retroviral drug-polymer conjugates of chitosan and alginate. Method: The synthetic pathways involved the synthesis of three different conjugates labelled as, A, B and C through a Schiff process reaction, Diazotization reaction and esterification reaction, respectively. After synthesis, the products were purified by recrystallisation and preparative TLC. The calibration curve

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Al Samarrai, Shatha Y., Radhi AlZubaidi, and Nadhir Al-Ansari. "Charge transfer complex-based spectrophotometric analysis of famotidine in pure and pharmaceutical dosage forms." Scientific Reports 14, no. 1 (2024). http://dx.doi.org/10.1038/s41598-024-54402-4.

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AbstractA straightforward and efficient spectrum technique was created using Ortho-chloranil as the electron acceptor (-acceptor) in a charge transfer (CT) complex formation reaction to determine the concentration of famotidine (FMD) in solutions. Compared to the double-distilled blank solution, the reaction result detected a definite violet colour at a maximum absorption wavelength of 546 nm, For concentrations range 2—28 µg/ml, the technique demonstrated excellent compliance with Beer-Law and Lambert's, as evidenced by its molar absorptivity of 2159.648 L mol−1 cm–1. Lower detection limits o

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Saemathong, Jedsadakorn, Nattadon Pannucharoenwong, Vannakorn Mongkol, Somsak Vongpradubchai, and Phadungsak Rattanadecho. "Analyzing Two Laser Thermal Energy Calculation Equations: A Comparison of Beer-Lambert's Law and Light Transport Equation." Engineered Science, 2023. http://dx.doi.org/10.30919/es912.

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Magnien, Véronique, Marx Cadignan, Olivier Faivret, and Gaelle Rosa. "Preliminary Study of Corrosion Mechanisms of Actinides Alloys: Calibration of FT-IR Spectroscopy." MRS Proceedings 1104 (2008). http://dx.doi.org/10.1557/proc-1104-nn07-10.

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AbstractIn situ analyzes of gaseous atmospheres could be performed by FT-IR spectroscopy in order to study the corrosion reactions of actinides. Nevertheless experimental conditions and the nature of studied species have a strong effect on IR absorption laws. Thus a prior calibration of our set-up is required to obtain an accurate estimation of gas concentration. For this purpose, the behavior of several air pure gases has been investigated according to their concentration from IR spectra. Reproducible results revealed subsequent increases of the most significant peak areas with gas pressure a

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Kaur, Prabhmandeep, Virander Kumar Jain, and Subrat Kar. "Comparison of Aperture Averaging and Receiver Diversity Techniques for Free Space Optical Links in Presence of Turbulence and Various Weather Conditions." Journal of Optical Communications 35, no. 4 (2014). http://dx.doi.org/10.1515/joc-2014-0007.

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AbstractIn this paper, we investigate the performance of a Free Space Optic (FSO) link considering the impairments caused by the presence of various weather conditions such as very clear air, drizzle, haze, fog, etc., and turbulence in the atmosphere. Analytic expression for the outage probability is derived using the gamma-gamma distribution for turbulence and accounting the effect of weather conditions using the Beer-Lambert's law. The effect of receiver diversity schemes using aperture averaging and array receivers on the outage probability is studied and compared. As the aperture diameter

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Tazeen, Gousia, K. Manju Sri, P. Lekhana, Y. Padmavathi, and N. Raghavendra Babu. "Quantitative Analysis of Irbesartan in Pharmaceutical Formulation Using MBTH Reagent." Indian Journal of Pharmaceutical Sciences, 2024, 535–42. https://doi.org/10.36468/pharmaceutical-sciences.16.6.535-542.

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A novel, simple, sensitive and efficient method has been established for the quantification of Irbesartan in bulk and pharmaceutical formulations utilizing the MBTH reagent. The objective of this analytical validation approach is to substantiate its efficacy by laboratory trials, demonstrating that the method satisfies the requisite minimal requirements for laboratory application. 3-methyl-2-benzothiazoline hydrazone interacts with the secondary amine group of Irbesartan in the presence of the oxidizing agent cerric ammonium sulphate. The resultant blue chromogen, when analysed spectrophotomet

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Kahyaei, Kiana, Adel Pourmand, and Farhang Abbasi. "A Low‐Cost Paper‐Based Microfluidic POCT Device for In Vitro Glucose Sensing Using Near‐Infrared Detection." IET Science, Measurement & Technology 19, no. 1 (2025). https://doi.org/10.1049/smt2.70019.

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ABSTRACTThis study presents a low‐cost Near Infrared (NIR)‐based optical microfluidic POCT device for in vitro glucose detection on a paper‐based microfluidic platform. The device is made using a UV‐curable resin that has been widely used in the publishing industry, which is proposed as a low‐cost alternative to the expensive SU‐8 photoresist normally used in photolithography. A 940 nm NIR LED–photodiode system was incorporated to non‐invasively measure glucose levels. Glucose concentrations ranging from 62.5 to 1000 mg/dL were tested using only 3 µL of sample. To evaluate the effect of light

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Badriah, Siti. "Identification of Blood Sugar Based on Non-invasive Measurements UsingPhotoplethysmography Method Signal Decoding in Diabetics in Tasikmalaya." Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics 6, no. 3 (2024). http://dx.doi.org/10.35882/ijeeemi.v6i3.8.

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Non-invasive blood sugar testing tools are now in great demand among the public. This research aims to develop a non-invasive blood sugar examination tool with a Photopletysmograph signal decoding system based on data acquisition from a wearable sensor device on the wrist. The tool used for data acquisition uses Near Infra Red Light-emitting Diode NIR LED 880 nm, 660 nm and 537 nm. This acquisition transfers signals from the body via a photodiode to a PC Personal Computer for processing using Matlab. The method used in this research is to look for the height of the systolic and diastolic ampli

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"A Simple and Alternative UV Spectrometric Method for the Estimation of Vitamin D3." Microbial Bioactives 2, no. 1 (2019). http://dx.doi.org/10.25163/microbbioacts.212086a2127261219.

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Background. A simple, rapid, accurate, precise, and economic spectrophotometric methods for estimation of vitamin D in from food, feed, pharmaceutical and environmental samples have been developed. Method. Vitamin D has absorbance maximums at 265.0 nm, so absorbance was measured at the same wave length for the estimation of vitamin D. Absorbance is measured at 275.0 nm. This drug obeys the Beer Lambert's law in the concentration range of 12 to 315 ng/mL. Methods are validated according to ICH guidelines and can be adopted for the routine analysis of vitamin D from food and drug samples. Result

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Balasaheb Aher, Kiran, Girija Balasaheb Bhavar, Madhav Ramdas Shelke, and Sadikali Fakirmahmmad Sayyad. "Environmentally Friendly Analytical Methods for Quantitative Measurement of Sofosbuvir in Pharmaceutical Formulations: Comparison of HPTLC and UV Spectrophotometric Approaches." Research Journal of Pharmacy and Technology, August 31, 2023, 3830–36. http://dx.doi.org/10.52711/0974-360x.2023.00632.

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For the quantitative measurement of sofosbuvir (SFR) in pharmaceutical formulation, high-performance thin-layer chromatographic (HPTLC) and environmentally friendly UV spectrophotometric approaches have been developed. HPTLC stationary phases were silica gel 60 F₂₅₄-coated aluminium plates. Toluene, chloroform, and ethanol were mixed 4:4:1 v/v/v. This mobile phase produced tiny spots of SFR with Rf 0.30±0.01. SFR was densitometrically analysed at 267nm in absorbance mode. Peak area showed great linearity (r2 =0.998) in the dilution range of 100–800ng/spot. A solvent combination of methanol and

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Mizher, Safeer Kareem, and Fawzi Yahya Wadday. "Synthesis, characterization and biological evaluation of some metals complexes with new Azo-Schiff ligand." International journal of health sciences, August 27, 2022, 10518–28. http://dx.doi.org/10.53730/ijhs.v6ns4.12219.

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In this research the ligand 5-((3-(1-((5-bromopyridin-2yl)imino)ethyl)-2-hydroxyphenyl)diazenyl)-2-phenyl-2,4-dihydro-3H-pyrazol-3-one (BHAP)was used to prepare new complexes with elements Cu(II) ,Ni(II), Pt(II),Co(II) ,Cr(III). The new ligand was analyzed by partial analysis of the elements (C.H.N). UV- visible and infrared rays(FTIR), spectroscopy H1NMR, C13NMR and mass spectrometry. The complexes were prepared after determining the optimum pH and concentration values by examining the spectra (UV - Vis) of the solutions of these complexes to find out the pH (3-10), concentration (1*10 -4-5

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Bisoi, Chiranjib, Suman Acharyya, and H. K. Sundeep Kumar. "UV Spectrophotometric and UPLC assay methods for the determination of Palbociclib in bulk and Tablet Dosage Form." Research Journal of Pharmacy and Technology, June 26, 2023, 2759–64. http://dx.doi.org/10.52711/0974-360x.2023.00453.

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The goal of this study was to create a sensitive and reliable UV-spectrophotometric and reverse phase liquid chromatographic method for determining Palbociclib in bulk and pharmaceutical dosage forms. The current UV approach uses methanol and phosphate buffer as a solvent to evaluate absorption at a maximum wavelength of 220nm. Waters Acquity BEH C18 (2.1 x 50mm, 1.7µm) UPLC column with Empower 2 was used in the UPLC procedure. The mobile phase was made up of 50:50 (v/v) methanol and phosphate buffer.The drug obeyed Beer Lambert's law in the UV technique in the concentration range of 1-70µg/ml

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ABD ALKAREEM, Ekhlas, Nuha FARHAN ABD AL-KARİM, and Israa I. MAHMOUD. "Synthesis of New Azo Compounds and Their Application for a Simple Spectrophotometric Determination of Methyldopa Drug Using Anthranilic Acid and 2-Aminopyrimidine as Reagents." Journal of the Turkish Chemical Society Section A: Chemistry, April 18, 2023, 621–32. http://dx.doi.org/10.18596/jotcsa.1234028.

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The goal of the current work is to synthesize methyldopa derivatives. Based on these reactions, two easy, speedy, accurate, inexpensive, and sensitive spectrophotometric approaches have been established for determining methyldopa (MED) in both pure and pharmaceutical forms. The proposed azo-coupling method depends on forming an azo compound between methyldopa drug and 2-AMPY or ANTH to produce two compounds of MED-2AMPY and MED-ANTH in the alkaline medium. The characterization of synthesized compounds utilizing UV-Visible and FT-IR spectra. FT-IR spectra of 2AMPY-MED confirm the existence of O

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Mahdlou, Zolfaghar, Rahebeh Amiri Dehkharghani, Ali Niazi, Atefeh Tamaddon, and Maryam Tajabadi Ebrahimi. "Co-sonicated coacervation for high-efficiency green nanoencapsulation of phytosterols by colloidal non-biotoxic solid lipid nanoparticles." Scientific Reports 14, no. 1 (2024). http://dx.doi.org/10.1038/s41598-024-54178-7.

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AbstractPlant sterols are used as a supplement or an additive to reduce LDL cholesterol. The poor dispersibility and instability of phytosterols are the main limitations of their application. So, we tried to overcome these problems through nanoencapsulation of them with colloidal natural RSs (SLNs) using an effective approach to achieve higher efficiency and less intrinsic coagulation. Phytosterols extracted from flax seeds oil with caffeine by a new method were encapsulated with a stable colloid of sheep fat and ostrich oil (1:2), soy lecithin, and glucose through co-sonicated coacervation. C

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Chivate, Aditya, and Chi Zhou. "Enhanced Schlieren System for In-Situ Observation of Dynamic Light-Resin Interactions in Projection-based Stereolithography Process." Journal of Manufacturing Science and Engineering, March 24, 2023, 1–32. http://dx.doi.org/10.1115/1.4062218.

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Abstract Digital maskless lithography is growing in popularity due to its unique ability to fabricate high-resolution parts at a fast speed without the need for physical masks. Though the theoretical foundation for photopolymerization exists, it is difficult to observe the voxel growth process in situ. This can be attributed to the low refractive index difference between cured and uncured resin, the microscopic size of the parts, and the rapid rate of photopolymerization after crossing the threshold. Therefore, a system that can address these issues is highly desired. Schlieren optics is a too

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leiva, Claudio Andrés, Claudio Acuña, and José Humire. "Flotation kinetic tracking of sand contaminated with hydrocarbons: image analysis of pulp color changes in time." Physicochemical Problems of Mineral Processing, December 8, 2023. http://dx.doi.org/10.37190/ppmp/176307.

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Hydrocarbon contamination in the environment represents a significant challenge. Soil remediation by flotation has been proposed as an effective approach to address this issue. This method entails the separation of hydrophobic compounds, such as soil hydrocarbons, by introducing air into a stirred reactor containing the soil pulp designated for remediation. Experiments were conducted using a 5 L Batch flotation cell to evaluate operating conditions. These experiments focused on obtaining flotation kinetics with different organic mixtures, including fine sands measuring under 150 µm. The experi

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Kumar Kumawat, Dr Mukesh, Sumit Tewatia, Gufran Ajmal, and Pooja Mittal. "Caffeine in Tablet Dosage Form: Analytical Method Development and Validation by Using U.V. Spectroscopy." International Journal of Life Science and Pharma Research, December 31, 2022, P107—P115. http://dx.doi.org/10.22376/ijlpr.2023.13.1.sp1.p107-p115.

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Abstract: Caffeine (1,3,7-trimethylpurine 2,6 dione) is a CNS stimulant. Caffeine is used as a drug having drug-addicted properties having a U.V. cutoff in the range of 272 nm to 297 nm in the U.V. spectrum. In this paper, we took a tablet with Caffeine as a single dose in solid dosage form with excipients that do not have a sharp peak in the U.V. spectrum range from 200 nm to 400 nm. The solvent used as a vehicle is a simple polar solvent with a U.V. cutoff at around 189nm to 191 nm. The U.V. spectrophotometer that we used is of Shimdzu having a double beam, which has two provisions to keep r

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"Development and Validation of Novel Analytical Simultaneous Estimation Based UV Spectrophotometric Method for Doxycycline and Levofloxacin Determination." Biointerface Research in Applied Chemistry 12, no. 4 (2021): 5458–78. http://dx.doi.org/10.33263/briac124.54585478.

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The thorough literature study uncovered that none of the most perceived pharmacopeias or any journals includes a method for simultaneous estimation of Doxycycline and Levofloxacin in combination by UV/Visible spectroscopy. So, it was felt fundamental to build up a system that will serve as a solid, precise UV technique for the simultaneous estimation of Doxycycline and Levofloxacin. DOXH and LVXH showed λmax at 273nm and 287nm respectively, and iso-absorptive point at 280nm in Phosphate buffer pH 6.8 prepared in Water: Methanol (80:20) dissolvable solvent system. Beer Lambert's law obeyed by b

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Yu, Tianqi, and Min Zhu. "Detection method of black goji berry anthocyanin content based on colorimetry." Journal of Emerging Investigators, 2025. https://doi.org/10.59720/24-091.

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Black goji berries are rich in anthocyanin, which is a natural water-soluble pigment widely found in plants. Anthocyanin has functions such as an antioxidant and antimutagen, which are extremely beneficial for human health. Currently, analyzing black goji anthocyanin content requires professional instruments in laboratories, and the process is difficult and time-consuming. Anthocyanin appears red and is relatively stable in acidic solutions, while in basic solutions, it appears blue but is unstable. Utilizing this characteristic, we aimed to develop a method for detecting the anthocyanin conte

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Gomez Bustamante, Tatiana, Marcela Mercado Montoya, Enrique Berjano, Ana González‐Suárez, and Erik Kulstad. "Proactive esophageal cooling during laser cardiac ablation: A computer modeling study." Lasers in Surgery and Medicine, March 4, 2024. http://dx.doi.org/10.1002/lsm.23774.

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AbstractBackground and ObjectivesLaser ablation is increasingly used to treat atrial fibrillation (AF). However, atrioesophageal injury remains a potentially serious complication. While proactive esophageal cooling (PEC) reduces esophageal injury during radiofrequency ablation, the effects of PEC during laser ablation have not previously been determined. We aimed to evaluate the protective effects of PEC during laser ablation of AF by means of a theoretical study based on computer modeling.MethodsThree‐dimensional mathematical models were built for 20 different cases including a fragment of at

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Koty, Afraim, and Mukul Sharma. "Determination of Antithyroid drug Propylthiouracil with Ru (III) in Pharmaceutical formulations and its characterization." Current Pharmaceutical Analysis 19 (May 24, 2023). http://dx.doi.org/10.2174/1573412919666230524140341.

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Background: Sulfur serves as a versatile element and an essential constituent of pharmaceutical industries, natural compounds, proteins, and biological systems. One of the fundamental constituents of sulfur is thiouracil, which forms several derivatives, including 6-methylthiouracil, 6-methyl-2-thiouracil, and 6-propylthiouracil. These derivatives act as effective chelating agents and can form complexes with metal ions. Background: Sulfur serves as a versatile element and an essential constituent of pharmaceutical industries, natural compounds, proteins, and biological systems. One of the fund

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