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Journal articles on the topic 'Ultra-Visible Spectrophotometry'

Author: Grafiati

Published: 7 June 2025

Last updated: 17 July 2025

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1

Andulaai, Arlina Mayharty, Ruslan Ruslan, Hardi Ys., and Dwi Juli Puspitasari. "STUDI PERBANDINGAN ANALISIS VITAMIN E MINYAK SAWIT MERAH TERSAPONIFIKASI ANTARA METODE SPEKTROFOTOMETRI UV-VIS DAN KCKT." KOVALEN 3, no. 1 (2017): 50. http://dx.doi.org/10.22487/j24775398.2017.v3.i1.8233.

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A research about a comparative study of spectrophotometry UV-Vis and HPLC method for the analysis of vitamin E in saponified red palm oil has been done. This research aims to compare the results of analysis using Spectrophotometer UV - Vis and HPLC to determine the concentration of vitamin E in red palm oil previously saponified and extracted. HPLC analysis was carried out using an RP-18 column and mobile phase composed a methanol and water ( 86:14 ), with a flow rate of 1 ml/min and UV detection at 290 nm. For the Spectrophotometric UV-Vis analysis, hexane was used as a solvent and the wavele

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2

Mashuni, T. S. Akbar, and M. Jahiding. "Development of Cypermethrin Pesticide Detection Method using Ultra Violet-Visible Spectrophotometry." Asian Journal of Chemistry 29, no. 2 (2017): 346–48. http://dx.doi.org/10.14233/ajchem.2017.20195.

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Watoni, Abdul Haris Haris. "Plasmonic Sensor Nata de Coco Film Inserted with Copper Nanoparticles for Detection of Mercury by UV-Vis Spectrophotometry." Chimica et Natura Acta 13, no. 1 (2025): 28–41. https://doi.org/10.24198/cna.v13.n1.54839.

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The rapid development of the mining industry has resulted in an increasing amount of toxic waste materials in the environment, including mercury (Hg). A reliable chemical sensor is needed to detect the presence of mercury. One of the chemical sensors that is starting to be widely developed is plasmonic film. This research aims to determine the characteristics and validity of plasmonic nata de coco-copper nanoparticle (CuNPs) films for cuvette type sensor chips in the rapid detection of Hg metal using UV-Vis spectrophotometry. This research began with the preparation of a bioreductor from red d

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Ruslan, Ruslan. "Effect Of Soft Drink To Demineralization On The Tooth Enamel By Addition Of Sodium Fluoride." Indonesian Journal of Chemical Research 1, no. 2 (2014): 61–65. http://dx.doi.org/10.30598/ijcr.2014.1-rus.

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This research was carried to determine the influence of soft drink with tooth, determine power to retard of NaF at the demineralization of tooth enamel and to determine of Calcium and Phosphate total which dissolve. The research was carried out with to flood the tooth in soft drink without to add a soft drink and with to add a soft drink at the certain time variation. The demineralization of tooth enamel to see at the decrease of tooth weight before and after flooded. The degree of Calcium in soft drink to measure with Atomic Absorption Spectrophotometry (AAS) and the degree of Phosphate in so

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Vaishnavi, Nikhade*1 Alpana Asnani2 Yogesh Gholse3 Nikhil Hatwar4 Pooja Wankhade5 Vaibhavi Meshram6 Madhuri Fating7. "A Comprehensive Review of Analytical Techniques for The Quantification of Salmeterol Xinafoate and Fluticasone Propionate in Pharmaceutical Preparations." International Journal of Pharmaceutical Sciences 3, no. 6 (2025): 644–55. https://doi.org/10.5281/zenodo.15593657.

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The identification and quantification of compounds in medicinal formulations rely heavily on analytical chemistry. SX and FP, two active components frequently utilize to treat asthma and chronic obstructive pulmonary disease (COPD), are synchronously estimated in a combined dosage form using a variety of analytical methodologies reviewed in this study.  This review highlights the use of techniques including Ultra-Visible spectroscopy, High-Performance Thin-Layer Chromatography (HPTLC) and High-Performance Liquid Chromatography (HPLC) are utilize to determine the concentration of these dru

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6

Sidelev, Dmitrii V., and Yuriy N. Yurjev. "The Reactive Deposition of TiO_x Thin Films." Advanced Materials Research 1040 (September 2014): 748–52. http://dx.doi.org/10.4028/www.scientific.net/amr.1040.748.

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The article reports on the aspects of reactive deposition ultra-thin TiOx films (50 nm) by means of dual magnetron system with mirror and closed magnetic field (B field) configurations. The hysteresis effect of electrical discharge characteristics and oxygen partial pressure P(O2) are presented. The dual magnetron with closed B field configuration has less hysteresis peculiarities and transits back to metallic deposition mode at higher O2 flow rate (Q). The deposition rates don’t depend on B field configuration and correlate with changing of P(O2) and discharge voltage. The refractive spectra

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7

Peerapattana, Jomjai, Yusuke Hattori, and Makoto Otsuka. "Simultaneous quantitative analysis of indomethacin and benzoic acid in gel using ultra-violet-visible spectrophotometry and chemometrics." Bio-Medical Materials and Engineering 30, no. 1 (2019): 73–84. http://dx.doi.org/10.3233/bme-181034.

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8

Papitha, Ruthiran, Lokesh Ravi, and Chinnadurai Immanuel Selvaraj. "PHYTOCHEMICAL STUDIES AND GC-MS ANALYSIS OF SPERMADICTYON SUAVEOLENS ROXB." International Journal of Pharmacy and Pharmaceutical Sciences 9, no. 3 (2017): 143. http://dx.doi.org/10.22159/ijpps.2017v9i3.16059.

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Objective: The present study was performed to identify the phytochemical constituents of leaves and flowers of a plant Spermadictyon suaveolens extracted with four different solvents.Methods: Dried and powdered samples were subjected to soxhlation based on the polarity of the solvents. The extracts were scanned using Ultra Violet-visible (UV-Vis) spectrophotometry with the wavelength ranging from 200–800 nm by comparing the absorption spectrum with the spectra of known compounds, Fourier Transform Infrared (FT-IR) spectrometry was used to find out the functional groups of the compounds and GC-

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9

Esati, Ni Ketut, I. Putu Eka Budiarta, Kadek Duwi Cahyadi, and Gusti Ayu Dewi Lestari. "ISOLASI DAN IDENTIFIKASI SENYAWA FLAVONOID FRAKSI ETIL ASETAT EKSTRAK DAUN AFRIKA (Vernonia amygdalina Del.)." Jurnal Ilmiah Ibnu Sina (JIIS): Ilmu Farmasi dan Kesehatan 6, no. 2 (2021): 350–60. http://dx.doi.org/10.36387/jiis.v6i2.741.

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African leaves (Vernonia amygdalina Del.) are reported to have activity as anti-malarial, antibacterial, anticancer, antioxidant, and others. This is closely related to the secondary metabolite compounds, that are contained in african leaves. One of the secondary metabolites that have a big role in the efficacy of african leaves is flavonoids. So that the purpose of this study, to isolated and identified the flavonoid compounds from african leaves. The plants were picked directly in the Tabanan area, Bali. The stages of this study were making the ethanol extract of african leaves, skrinning of

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10

Alsukaibi, Abdulmohsen K. D., Mohd Wajid Ali Khan, Ahmed Al-Otaibi, et al. "Modified ZnO mediated dye detoxification by a heterogeneous Fenton process." Emerging Materials Research 12, no. 2 (2023): 1–9. http://dx.doi.org/10.1680/jemmr.22.00151.

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The continuous and unchecked discharge of effluents by the dyeing industry in water bodies, have lead to the rising importance of water treatment. This study focusses on the successful abatement of Auramine O (AM) dye in the aqueous system by a heterogeneous Fenton process using ultrasonication. Zinc oxide (ZnO) nanoparticles (NPs) were obtained by a straightforward precipitation method and then modified by glycine (M-ZnO). The NPs size sharply decreased upon modification with glycine. Light absorbing capacity and band gap were determined by Ultra Violet (UV) visible spectrophotometry. X-ray d

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11

Eticha, Shibiru, and Tesfa Bedassa. "Determination of Caffeine in Coffee Samples by High Performance Liquid Chromatography and Ultra Violet - Visible Spectrophotometry Methods from Wollega, Ethiopia." International Journal of Biochemistry, Biophysics & Molecular Biology 5, no. 1 (2020): 8. http://dx.doi.org/10.11648/j.ijbbmb.20200501.12.

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12

Leborgne, Cécile, Emmanuelle Meudec, Nicolas Sommerer, Gilles Masson, Jean-Roch Mouret, and Véronique Cheynier. "Untargeted Metabolomics Approach Using UHPLC-HRMS to Unravel the Impact of Fermentation on Color and Phenolic Composition of Rosé Wines." Molecules 28, no. 15 (2023): 5748. http://dx.doi.org/10.3390/molecules28155748.

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Color is a major quality trait of rosé wines due to their packaging in clear glass bottles. This color is due to the presence of phenolic pigments extracted from grapes to wines and products of reactions taking place during the wine-making process. This study focuses on changes occurring during the alcoholic fermentation of Syrah, Grenache and Cinsault musts, which were conducted at laboratory (250 mL) and pilot (100 L) scales. The color and phenolic composition of the musts and wines were analyzed using UV-visible spectrophotometry, and metabolomics fingerprints were acquired by ultra-high pe

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Drakopoulos, Stavros X., Oreste Tarallo, Linlin Guan, Ignacio Martin-Fabiani, and Sara Ronca. "Nanocomposites of Au/Disentangled UHMWPE: A Combined Optical and Structural Study." Molecules 25, no. 14 (2020): 3225. http://dx.doi.org/10.3390/molecules25143225.

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The term disentangled refers to polymers with fewer entanglements in the amorphous regions, a metastable condition that can significantly affect the material’s properties and processing behavior. The lower entanglement density in ultra-high molecular weight polyethylene (dis-UHMWPE) facilitates the solid-state processability into uniaxially-oriented specimens reaching very high draw ratios and crystallinities. In this study, Au/dis-UHMWPE nanocomposites were formulated and processed at variable draw ratios. Polarized light microscopy suggests gold nanoparticles are oriented in arrays following

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Lewinski, Cleomara Salete, Itamar Luís Gonçalves, Ana Cláudia Piovezan Borges, Nessana Dartora, Lauro Mera de Souza, and Alice Teresa Valduga. "Effects of UV light on the physic-chemical properties of yerba-mate." Nutrition & Food Science 45, no. 2 (2015): 221–28. http://dx.doi.org/10.1108/nfs-07-2014-0065.

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Purpose – The aim of this paper is to evaluate the effects of ultraviolet (UV) light on the color, secondary metabolites and sensory acceptance of processed yerba-mate. Design/methodology/approach – Samples were exposed to UV light for 72 hours. The colorimetric coordinates (L*, a* and b*) were analyzed every 6 hours, while secondary metabolites and sensory acceptance were assessed at the beginning and at the end of the experiment. Methylxanthines and phenolic compounds were quantified by ultra performance liquid chromatography photodiode array detectors and vegetable pigments by UV/visible sp

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15

Zhang, Hai, Dingyuan Niu, Junbiao Yang, Xiaoyang Zhang, Jun Zhu та Wencai Li. "β-Ga2O3 Thin Films via an Inorganic Sol–Gel Spin Coating: Preparation and Characterization". Nanomaterials 15, № 4 (2025): 277. https://doi.org/10.3390/nano15040277.

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β-Ga2O3 holds significant promise for use in ultraviolet (UV) detectors and high-power devices due to its ultra-wide bandgap. However, the cost-effective preparation of large-area thin films remains challenging. In this study, β-Ga2O3 thin films are prepared using an inorganic solution reaction spin-coating method followed by post-annealing. The structures, surface morphologies, and optical properties of the films are then characterized using X-ray diffraction, scanning electron microscopy, and ultraviolet–visible spectrophotometry. A low-cost Ga metal was used to produce NH4Ga(SO4)2, which wa

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Girolami, Marco, Alessandro Bellucci, Matteo Mastellone, et al. "Femtosecond-Laser Nanostructuring of Black Diamond Films under Different Gas Environments." Materials 13, no. 24 (2020): 5761. http://dx.doi.org/10.3390/ma13245761.

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Irradiation of diamond with femtosecond (fs) laser pulses in ultra-high vacuum (UHV) conditions results in the formation of surface periodic nanostructures able to strongly interact with visible and infrared light. As a result, native transparent diamond turns into a completely different material, namely “black” diamond, with outstanding absorptance properties in the solar radiation wavelength range, which can be efficiently exploited in innovative solar energy converters. Of course, even if extremely effective, the use of UHV strongly complicates the fabrication process. In this work, in orde

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Krishna, P. Siva, M. M. Eswarudu, A. Bhavani Sailu, et al. "In-depth Exploration of the Pharmacological, Analytical, and Pharmaceutical Attributes of Irbesartan." UTTAR PRADESH JOURNAL OF ZOOLOGY 45, no. 10 (2024): 175–82. http://dx.doi.org/10.56557/upjoz/2024/v45i104064.

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Irbesartan, an angiotensin II receptor blocker (ARB), has gained prominence in the management of hypertension and diabetic nephropathy due to its potent antihypertensive and Reno protective effects. This review provides a comprehensive overview of the pharmacological, analytical, and pharmaceutical characteristics of Irbesartan. Pharmacologically, Irbesartan selectively antagonizes the angiotensin II type 1 (AT1) receptors, leading to vasodilation, reduced aldosterone secretion, and consequently blood pressure lowering. The drug also exhibits favourable effects on renal function, making it a c

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Vasyl, Chornyi, Kushniruk Vasyl, and Georgiyants Victoriya. "Design and implementation of green chemistry approaches into pharmaceutical analysys of benzydamine dosage formes." ScienceRise: Pharmaceutical Science, no. 5(21) (October 31, 2019): 12–17. https://doi.org/10.15587/2519-4852.2019.182024.

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<strong>Aim. </strong>The development of the pharmaceutical industry of Ukraine and the world has led to an increase in the need for the use of hazardous and toxic chemicals and solvents, which affects the safety of the environment and directly employees of pharmaceutical companies. Therefore, one of the solutions to this problem is the implementation of “green chemistry” approaches in pharmaceutical quality control laboratories. <strong>Materials and methods. </strong>Chromatographic separation methods are used for the qualitative and quantitative analysis of raw materia

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Rahmani, Shaghayegh, Seyed Naser Azizi, and Neda Asemi. "Application of Synthetic Nanozeolite Sodalite in Drug Delivery." International Current Pharmaceutical Journal 5, no. 6 (2016): 55–58. http://dx.doi.org/10.3329/icpj.v5i6.27710.

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In this study nanozeolite sodalite was synthesized from natural volcanic glass (perlite) as silica (Si) source and sodium aluminate as aluminium (Al) source without using any organic template. We use perlite as Si source because it is cost-effective and available source. These nanoparticles of synthesized zeolite were prepared at 170°C in stainless steel reactor with hydrothermal method. The synthesized nanozeolite was characterized by X-ray diffraction (XRD), fourier transform infrared (FTIR) and scanning electron microscopy (SEM) techniques. Chemical composition of perlite was determined by

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Zhang, Mingyu, Kuankuan Lu, Zhuohui Xu, et al. "The Investigation of Indium-Free Amorphous Zn-Al-Sn-O Thin Film Transistor Prepared by Magnetron Sputtering." Coatings 11, no. 5 (2021): 585. http://dx.doi.org/10.3390/coatings11050585.

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The indium-free amorphous oxide semiconductor thin film transistor (AOS-TFT) with aluminum (Al) electrodes shows broad application prospects in new-generation display technologies, such as ultra-high definition large-screen display, OLED display and 3D display. In this work, the thin film transistor (TFT) with a zinc-aluminum-tin-oxide (ZATO) semiconductor as the active layer and an Al electrodes as the source and drain (S/D) was investigated. The optical, electrical and semiconductive properties of the ZATO films were evaluated by atomic force microscopy (AFM), ultraviolet–visible spectrophot

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Zamora-Sequeira, Roy, Fernando Alvarado-Hidalgo, Diana Robles-Chaves, et al. "Electrochemical Characterization of Mancozeb Degradation for Wastewater Treatment Using a Sensor Based on Poly (3,4-ethylenedioxythiophene) (PEDOT) Modified with Carbon Nanotubes and Gold Nanoparticles." Polymers 11, no. 9 (2019): 1449. http://dx.doi.org/10.3390/polym11091449.

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Mancozeb is a worldwide fungicide used on a large scale in agriculture. The active component and its main metabolite, ethylene thiourea, has been related to health issues. Robust, fast, and reliable methodologies to quantify its presence in water are of great importance for environmental and health reasons. The electrochemical evaluation of mancozeb using a low-cost electrochemical electrode modified with poly (3,4-ethylene dioxythiophene), multi-walled carbon nanotubes, and gold nanoparticles is a novel strategy to provide an in-situ response for water pollution from agriculture. Additionally

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Karimah, Ira Siti, Rendi Saepul Dani, Hanisa Agustin, Sri Rohmawati, Luthfi Rahmawati, and Susanti Susanti. "Formulasi dan Uji SPF Sediaan Sunscreen Powder Ekstrak Daun Kelor (Moringa oleifera)." Jurnal Sains dan Kesehatan 5, no. 6 (2023): 893–99. http://dx.doi.org/10.25026/jsk.v5i6.2108.

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The repeated use of sunscreen makes many types and dosage forms of sunscreen. Sunscreen powder is a good alternative form of sunscreen because their use does not damage the make-up on the face. Moringa leaf extract containing flavonoids such as quercetin has antioxidant activity that can inhibit free radicals. These antioxidant compounds are very important in the content of active substances in a sunscreen. The aim of this study was to formulate moringa leaf extract into a sunscreen powder and determine the value of Sun Protection Factor (SPF). Moringa leaves were extracted by maceration metho

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Ma, Ruoke, Heng Liu, Yunlin Fu, Yingjian Li, Penglian Wei, and Zhigao Liu. "Variation of Chemical Components in Sapwood, Transition Zone, and Heartwood of Dalbergia odorifera and Its Relationship with Heartwood Formation." Forests 12, no. 5 (2021): 577. http://dx.doi.org/10.3390/f12050577.

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Heartwood has a high economic value because of its natural durability, beautiful color, special aroma, and richness in active ingredients used in traditional Chinese medicine. However, the mechanism of heartwood formation remains unclear. Dalbergia odorifera was selected as the object of research to analyze this variation in the chemical composition of sapwood, transition zone, and heartwood as well as to elucidate the relationship between this variation and the formation of heartwood. The variation of secondary metabolites was analyzed using gas chromatography-mass spectrometry and ultra-high

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Khammas, Zuhair, and Suher Ahmad. "Micelle-mediating Extraction Combined with Visible Spectrophotometry for the Determination of Ultra Trace Amounts of Bendiocarb Insecticide in Various Matrices after Oxidative Coupling with O-Toluidine." International Research Journal of Pure and Applied Chemistry 10, no. 2 (2015): 1–16. http://dx.doi.org/10.9734/irjpac/2016/21948.

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Del Buono, Daniele, Alessandro Di Michele, Ferdinando Costantino, Marco Trevisan, and Luigi Lucini. "Biogenic ZnO Nanoparticles Synthesized Using a Novel Plant Extract: Application to Enhance Physiological and Biochemical Traits in Maize." Nanomaterials 11, no. 5 (2021): 1270. http://dx.doi.org/10.3390/nano11051270.

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The need to increase crop productivity and resistance directs interest in nanotechnology. Indeed, biogenic metal oxide nanoparticles can promote beneficial effects in plants, while their synthesis avoids the environmental impacts of conventional synthetic procedures. In this context, this research aimed to synthesize biogenic zinc oxide nanoparticles (ZnO-NPs) using, for the first time, an extract of a wild and spontaneous aquatic species, Lemna minor (duckweed). The effectiveness of this biogenic synthesis was evidenced for comparison with non-biogenic ZnO-NPs (obtained without using the plan

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Zhang, Huang-qin, Pei Liu, Jin-ao Duan, et al. "Comparative Analysis of Carbohydrates, Nucleosides and Amino Acids in Different Parts of Trichosanthes kirilowii Maxim. by (Ultra) High-Performance Liquid Chromatography Coupled with Tandem Mass Spectrometry and Evaporative Light Scattering Detector Methods." Molecules 24, no. 7 (2019): 1440. http://dx.doi.org/10.3390/molecules24071440.

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Trichosanthes kirilowii Maxim. is one of the original plants for traditional Chinese medicines Trichosanthis Fructus, Trichosanthis Semen, Trichosanthis Pericarpium and Trichosanthis Radix. Amino acids, nucleosides and carbohydrates are usually considered to have nutritional value and health-care efficacy. In this study, methods involving high-performance liquid chromatography coupled with evaporative light scattering detector (HPLC-ELSD), UV-visible spectrophotometry and ultra-high-performance liquid chromatography coupled with tandem mass spectrometry (UHPLC-MS/MS) were established for quant

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Danao, Kishor. "METHODICAL INSIGHTS INTO REPORTED SOPHISTICATED ANALYTICAL TECHNIQUES FOR THE DETERMINATION OF ANTI-DIABETIC DRUG EMPAGLIFLOZIN IN VARIOUS PHARMACEUTICAL PRODUCTS." Journal of Medical pharmaceutical and allied sciences 10, no. 4 (2021): 3206–11. http://dx.doi.org/10.22270/jmpas.v10i4.1367.

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Empagliflozin (EMPA), chemically known as (2S,3R,4R,5S,6R)-2-[4-chloro-3-[[4-[(3S)-oxolan-3-yl]oxyphenyl]methyl]phenyl]-6-(hydroxymethyl)oxane-3,4,5-triol is an oral anti-diabetic drug used for treating type 2 diabetes mellitus that produces hypoglycemia by selective and competitive inhibition of sodium/glucose co-transporter-2 (SGLT2) protein. Currently, EMPA is an emerging drug being prescribed by medical practitioners. The quality-oriented scheduled investigation of diverse commercially obtainable formulations of EMPA is a foremost challenge and recently few sophisticated analytical methods

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Xing, Zheng, Yang Han, Hao Pang, et al. "Evaluating the Root Extract of Reynoutria ciliinervis (Nakai) Moldenke: An Analysis of Active Constituents, Antioxidant Potential, and Investigation of Hepatoprotective Effects in Rats." Molecules 29, no. 19 (2024): 4701. http://dx.doi.org/10.3390/molecules29194701.

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Reynoutria ciliinervis (Nakai) Moldenke (R. ciliinervis) root, a traditional Chinese medicine, was found to exhibit remarkable pharmacological properties through a series of comprehensive investigations. Our study commenced with a qualitative phytochemical analysis that identified 12 bioactive compounds within the plant. Subsequently, utilizing ultraviolet-visible spectrophotometry, the methanol extract emerged as the optimal solvent extract, which was abundant in diverse classes of compounds such as carbohydrates, phenolics, steroids, alkaloids, phenolic acids, and tannins. In vitro antioxida

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Ojo, Abiodun Ayodele, Akanji Raji Mubarak, Amos Onasanya, Jonathan Johnson, Ezekiel Adewole, and Olajumoke Tolulope Idowu. "Organic Compound Composition in Sachet and Bottled Water Portable Produced in Southwest Ado Ekiti, Nigeria." ABUAD International Journal of Natural and Applied Sciences 2, no. 2 (2022): 59–65. http://dx.doi.org/10.53982/aijnas.2022.0202.02-j.

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Organic pollutants are pollutants that are organic in nature, basically containing carbon covalently bonded with other elements. They are known to be toxic or carcinogenic in nature. Their presence in water in large quantity causes considerable and widespread concern. Ten water samples -sachets and bottles, were bought from different potable water producing plants in Ado-Ekiti environs. By using a separatory funnel with liquid-liquid extraction system of 50mL:50mL n-Hexane: Dichloromethane, organic contaminants were extracted from the water samples. These samples were analyzed using ultra viol

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Gunarti, Neni Sri, and Lia Fikayuniar. "FORMULASI DAN UJI AKTIVITAS GEL TABIR SURYA DARI EKSTRAK BUAH BLACKBERRY (Rubus fruticosus) SECARA IN VITRO DENGAN SPEKTROFOTOMETRI UV-VISIBEL." Kartika : Jurnal Ilmiah Farmasi 7, no. 2 (2020): 66. http://dx.doi.org/10.26874/kjif.v7i2.227.

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<p align="center"><strong>Abstrak</strong></p><p align="center"><strong> </strong></p><p>Buah <em>Blackberry</em> (<em>Rubus fruticosus</em>) merupakan buah yang mengandung senyawa fenolik dan antosianin yang tinggi yang memiliki aktivitas sebagai antioksidan. Aktivitas antioksidan berkaitan dengan aktivitas fotoprotektif sehingga dapat dimanfaatkan dalam bentuk sediaan tabir surya seperti sediaan gel. Maka dilakukan penelitian untuk mengembangkan ekstrak <em>blackberry</em> menjadi gel tabir surya. Penel

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Lomelí-Rosales, Diego Alberto, Adalberto Zamudio-Ojeda, Oscar Kevin Reyes-Maldonado, et al. "Green Synthesis of Gold and Silver Nanoparticles Using Leaf Extract of Capsicum chinense Plant." Molecules 27, no. 5 (2022): 1692. http://dx.doi.org/10.3390/molecules27051692.

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So far, several studies have focused on the synthesis of metallic nanoparticles making use of extracts from the fruit of the plants from the genus Capsicum. However, as the fruit is the edible, and highly commercial, part of the plant, in this work we focused on the leaves, a part of the plant that is considered agro-industrial waste. The biological synthesis of gold (AuNPs) and silver (AgNPs) nanoparticles using aqueous extracts of root, stem and leaf of Capsicum chinense was evaluated, obtaining the best results with the leaf extract. Gold and silver nanoparticles synthesized using leaf extr

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Rorong, Johnly Alfreds. "Analisis Fenolik Jerami Padi (Oryza Sativa) pada Berbagai Pelarut Sebagai Biosensitizer untuk Fotoreduksi Besi." Jurnal MIPA 4, no. 2 (2015): 169. http://dx.doi.org/10.35799/jm.4.2.2015.10430.

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Telah dilakukan analisis fenolik dalam Jerami Padi (Oryza sativa). Penelitian ini dilakukan beberapa tahap, meliputi : persiapan sampel; ekstraksi maserasi selama 1 x 24 jam dengan berbagai pelarut: akuades, metanol, etanol dan petroleum eter; dievaporasi selama 1 jam dan dianalisis senyawa fenolik secara kualitatif menggunakan reagen Folin Ciocalteu 50% menghasilkan ekstrak akuades (EA); ekstrak metanol (EM); ekstrak etanol (EE) dan ekstrak petroleum eter (EPE), selanjutnya dianalisis secara kuantitatif menggunakan metode spektrofotometri ultra violet visible (UV-Vis) pada panjang gelombang 7

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Mondal, Sumanta, Sunil Reddy Goluguri, Prasenjit Mondal, Sheeba Prathyusha Vadlapati, Aishwarya P. Nair, and Syed Tazib Rahaman. "Development and Validation of Few UV Spectrophotometric Methods for the Determination of Valganciclovir in Bulk and Pharmaceutical Dosage Form." Pharmaceutical Methods 9, no. 2 (2018): 5. https://doi.org/10.5281/zenodo.14586257.

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Background: The present research paper described about the optimization of various zero order and first order UV spectrophotometric method using different buffers. Validation study was performed to develop a simple, sensitive, rapid, accurate and economical Ultra Violet spectrophotometric method for the estimation of Valganciclovir. Methods: UV 1800 double beam UV Visible Spectrophotometer with a pair of 10mm path length matched quartz cells were used for the study. Method A (Water), Method B (phosphate buffer pH2), Method C (Phosphate buffer pH4) and Method D (phosphate buffer pH5) were devel

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Chou, Chih Wei, Yueh Hsiung Kuo, You Cheng Hseu, Yung Shiu Chen, and Te Hsing Wu. "Study on the Preparation, Property and Drug Release Carrier of Chitosan-Based Nanoparticles for Cancer Treatment." Advanced Materials Research 284-286 (July 2011): 1800–1803. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.1800.

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In this paper, the effective nanocompoties (EFNCs) as drug carriers are prepared by grafting reaction of cationic chitosan (CS) and anionic tripolyphosphate (TPP) to encapsulate cancer therapeutic agents such as berberine (BB), KCY-24B…etc. These EFNCs were featured by ultra violet–visible-near infrared spectrophotometer (UV-VIS-NIR spectrophotometer), fourier transform infrared spectrophotometer (FT-IR), zetasizer, transmission electron microscope (TEM) and field-emission scanning electron microscope (FESEM). So we can obtain here the synthetic method, characterization, and functionality of t

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Patra, Poulami, Somsubhra Ghosh, Tathagata Roy, and B. V. V. Ravi kumar. "A novel spectrophotometric method development and validation of Tenagliptin in its Tablet dosages form." Journal of Drug Delivery and Therapeutics 9, no. 5 (2019): 95–98. http://dx.doi.org/10.22270/jddt.v9i5.3503.

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The aim of present work was to develop a new, economical & simple analytical method of Teneligliptin & its validation as per International Conference on Harmonization (ICH) guideline, which is a new antidiabetic drug that is used to treat Non-Insulin Dependent Diabetis Melitus (NIDDM) patients. A sensitive and specific Ultra Violet (UV) Visible method was developed & the analysis was carried out by using Shimazdu 1800 Spectrophotometer, 0.1(N) NaOH was used as a solvent. The UV- Visible Spectrophotometric estimation was carried out at a λ max of 242 nm using 1cm thick quartz cell.

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Shukla, R. K., Susheel Kumar Singh, and Akhilesh Tripathi. "Structural and Optical Study of Chemically Synthesized Polyaniline." SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology 7, no. 01 (2015): 33–36. http://dx.doi.org/10.18090/samriddhi.v7i1.3310.

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Polyaniline (PANI) is synthesized by chemical oxidative polymerization method. The, characterization were made using XRD (X-ray diffraction), FT-IR (Fourier transform spectroscopy), UV -vis (ultra-violet visible spectrophotometer) technique which confirms the synthesis of the Polyaniline. The surface morphology of Polyaniline was studied with scanning electron microscope (SEM).

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Mohammed, Abdul Moiz. "UV-Visible Spectrophotometric Method and Validation of Organic Compounds." European Journal of Engineering Research and Science 3, no. 3 (2018): 8. http://dx.doi.org/10.24018/ejers.2018.3.3.622.

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Absorption and emission of radiation by a compound at different wavelengths in visible and ultra violet region forms an analytical tool for identification of organic compounds. Researchers and scientists from different fields of chemistry and life sciences are constantly in search of an alternate ways to analyze the chemical reactions involving organic and inorganic compounds. The UV-Visible spectroscopic technique serves as an important and simple technique in finding concentration of molecules in a solution, identification the functional groups identification of conjugated organic compounds.

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Mohammed, Abdul Moiz. "UV-Visible Spectrophotometric Method and Validation of Organic Compounds." European Journal of Engineering and Technology Research 3, no. 3 (2018): 8–11. http://dx.doi.org/10.24018/ejeng.2018.3.3.622.

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Absorption and emission of radiation by a compound at different wavelengths in visible and ultra violet region forms an analytical tool for identification of organic compounds. Researchers and scientists from different fields of chemistry and life sciences are constantly in search of an alternate ways to analyze the chemical reactions involving organic and inorganic compounds. The UV-Visible spectroscopic technique serves as an important and simple technique in finding concentration of molecules in a solution, identification the functional groups identification of conjugated organic compounds.

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Chou, Chih Wei, Sheng Yueh Chang, Yung Shiu Chen, Wu Chung Su, and Te Hsing Wu. "Herbal-Loaded Multifunctional Nanocomposities as Nanocarrier for Cancer Therpy: Synthesis and Quality." Advanced Materials Research 311-313 (August 2011): 1625–29. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1625.

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The multifunctional nanocompoties (MFNCs) as drug release carriers are prepared by cross-linking reaction of cationic chitosan (CS) and anionic tripolyphosphate (TPP) to encapsulate Fe3O4 nanoparticles(NPs) loaded cancer therapeutic agents such as berberine (BB), KCY-24B, KCY-Tai…etc were studied. These MFNCs were characterized by fourier transform infrared spectrophotometer (FT-IR), ultra violet–visible-near infrared spectrophotometer (UV-VIS-NIR spectrophotometer), size analysis, transmission electron microscope (TEM) and field-emission scanning electron microscope (FESEM). Then we obtained

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Yang, Bo, Feng Qi, Jingwen Tan, Tao Yu, and Chengtun Qu. "Study of Green Synthesis of Ultrasmall Gold Nanoparticles Using Citrus Sinensis Peel." Applied Sciences 9, no. 12 (2019): 2423. http://dx.doi.org/10.3390/app9122423.

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Sweet orange (Citrus sinensis) peel, one of the most underutilized biowaste, was in this study employed for the green synthesis of gold nanoparticles (AuNPs) as an alternative source of reductant and stabilizer. Spherical AuNPs with narrow size distribution (1.75 ± 0.86 nm) were obtained by controlling pH and adjusting sequence for the first time. ultraviolet-visible (UV-vis) spectrophotometer, transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), dynamic light scattering (DLS) were applied to detect the characteristic surface plasmon resonance peak, morphological and a

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Nikam, R. M. "Exploration of Spectroscopic Study of Screen-Printed Tungsten Oxide: Tin Oxide Nano-Composite Powder Fired at High Temperature." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (2022): 3381–89. http://dx.doi.org/10.22214/ijraset.2022.45720.

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Abstract: Thick films of pure Tin oxide (SnO2) and composite 1%, 3%, 5%, 7% and 9 % tungsten oxide (WO3) incorporated into pure Tin oxide (SnO2) were prepared with standard screen printing technique. All samples were prepared on glass substrate and subjected to drying and firing at 5000C at 5 hours in muffle furnace. Thick films of tin oxide (SnO2) and composite 1%, 3%, 5%, 7% and 9 % Tungsten Oxide (WO3) incorporated into pure tin oxide (SnO2) were examined for Scanning Electron Microscopy (S.E.M), Energy Dispersive X-ray Analysis (E.D.A.X), X-ray diffraction (X.R.D), Fourier Transform infra-

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Ismail, Khadijah, and Wardah Abdul Razak. "A Quality Discriminaton within Ultra Violet Spectrum using Optical Sensor for Selected Commercial Oils." MATEC Web of Conferences 201 (2018): 03002. http://dx.doi.org/10.1051/matecconf/201820103002.

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Nowadays ultra violet-visible (UV-Vis) spectrophotometers are widely used and is one of an important analytical instrument in modern day research. This work is conducted to determine oil quality discrimination of different selected oils using optical sensor, where the oil samples are analyzed within ultra violet (UV) spectrum, which ranges from 200nm to 400nm wavelengths. The oils extracted from five plants are analyzed based on the light absorption rate at different wavelengths. Different energy value is required for electron transition from lower level to the higher, due to different molecul

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Zhuang, Rong Rong, Yi Zong He, and Yu Hong Fang. "Crystal Growth, Optical Spectra and Thermal Properties of Na₂Ni(SO₄)₂·4H₂O Crystal." Advanced Materials Research 216 (March 2011): 312–15. http://dx.doi.org/10.4028/www.scientific.net/amr.216.312.

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Na2Ni(SO4)2·4H2O crystal (NNSH) size up to 12mm×10mm×8mm have been grown by heating the solution gradually. The structure of crystal was determined by X-ray diffraction method. The transmission spectra with strong absortpion band at visible and infrared region were measured by using UV-VIS ultraviolet spectrophotometer. Absorption cross-sections of crystal at 344nm and 640nm were evaluated as 4.380×10-18cm2and 3.63×10-18cm-2,respectively. NNSH was stable at high temperature, for the dehydration temperature of the crystal was determined to be 132.6 °C by thermogravimetric measurement. It was sh

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Mathew, Ceema, Shashikala Metri, C. Raja Vardhan, B. Lakshmi Prasanna, Shakapuram Neha, and Nekkanti Subash. "Ultra Sensitive Visible Spectroscopic Methods for Cefpodoxime Proxetil Using NQS and PDAC Reagents." International Research Journal of Pure and Applied Chemistry 25, no. 6 (2024): 134–44. https://doi.org/10.9734/irjpac/2024/v25i6891.

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Very sensitive and accurate visible spectrophotometric methods were developed and validated to quantify Cefpodoxime Proxetil in API and marketed formulation. Method A is based on the measurement of absorbance of a reddish-orange coloured chromogen at 454.9 nm, formed by the condensation reaction of the primary amino group of Cefpodoxime Proxetil with NQS reagent. Method B is based on the measurement of absorbance of a light yellowish green coloured chromogen at 401.3 nm, due to the Schiff’s base formed between Cefpodoxime Proxetil and PDAC reagent in acidic medium. Beer-lambert’s law is obeyed

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Afzal, Fakhira, Hafeez Ullah, Muhamad Amjad, et al. "Detection of Uric Acid in UV-VIS wavelength Regime." JOURNAL OF NANOSCOPE (JN) 4, no. 1 (2023): 75–81. http://dx.doi.org/10.52700/jn.v4i1.71.

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Background: Current techniques for uric acid (UA) detection are time consuming and therefore, need to improve the detection methods like absorption. Objective: There was a need to establish a technique that has low integration time for detection of UA using absorption technology. Methods: we measured the concentrations of UA using the ultra violet visible (UV/Vis) spectrophotometer in the wavelength regime (190-1100 nm). Results and Conclusion: In this work, the proposed spectroscopic technique can detect each concentration and interpret into an absorption value in a constant

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Khursheed, Sanya, Rida Tehreem, Muhammad Awais, et al. "Visible-Light Driven Photodegradation of Industrial Pollutants Using Nitrogen-Tungsten Co-Doped Nanocrystalline TiO2: Spectroscopic Analysis of Degradation Reaction Path." Nanomaterials 12, no. 13 (2022): 2246. http://dx.doi.org/10.3390/nano12132246.

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The purpose to conduct this research work is to study the effect of photocatalytic degradation by developing cost-effective and eco-friendly nitrogen and tungsten (metal/non-metal) co-doped titania (TiO2). The inherent characteristics of synthesized nanoparticles (NPs) were analyzed by Fourier transform infra-red spectroscopy (FT-IR), ultra-violet visible (UV-Vis) spectroscopy, Raman spectroscopy, Field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX), dynamic light scattering (DLS), X-ray diffraction (XRD) spectrometry, and atomic force microscopy (AF

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Sai Chebrolu, Tejasvini, Lalit Kumar, and Ruchi Verma. "Lacidipine: review of analytical methods developed for pharmaceutical dosage forms and biological fluids." Bioanalysis 13, no. 12 (2021): 1011–24. http://dx.doi.org/10.4155/bio-2021-0024.

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Lacidipine (LAC) is a calcium antagonist used in the treatment of hypertension. It is a lipophilic drug containing dihydropyridine ring that is responsible for the activity. This review article gives an overview of various analytical techniques proposed for the determination of LAC in pharmaceutical dosage forms, in pure form, in biological fluids and to determine characteristics of LAC in modified release dosage forms. Ultra violet/visible spectrophotometric, spectroflourimetric, high performance liquid chromatography, high performance thin layer chromatography, electro-analytical, bioanalyti

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Sauli, Zaliman, Vithyacharan Retnasamy, Chai Jee Keng, Moganraj Palianysamy, and Hussin Kamarudin. "Reflectance Analysis of Sputtered Indium Tin Oxide(ITO) Using UV Lambda." Applied Mechanics and Materials 680 (October 2014): 102–5. http://dx.doi.org/10.4028/www.scientific.net/amm.680.102.

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Preliminary analysis has been done on the reflectance of sputtered Indium Tin Oxide (ITO) layers. The analysis is done for two different types of layers which is the directly sputtered ITO films and the treated ITO films. In both type of the film it is divided into the thickness of the layer and deposition time. Analysis is done using Perkin Elmer Lambda 950 UV/Vis/NIR Spectrophotometer. The working spectral range is from 250 nm to 800 nm (for transmittance), covering the ultra-violet (UV) and visible spectrum. Results shows thatthe directly deposited thin ITO films had lower reflectance compa

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Abdul-Kader, A. M., Y. A. El-Gendy, Awad A. Al-Rashdi, and A. M. Salem. "Effect of N₂ Ion Bombardment on Optical and Mechanical Properties of Ultra-High Molecular Weight Polyethylene (UHMWPE)." Defect and Diffusion Forum 341 (July 2013): 169–80. http://dx.doi.org/10.4028/www.scientific.net/ddf.341.169.

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The effect of ion beam bombardment on the optical and mechanical properties of ultra-high molecular weight polyethylene (UHMWPE) was investigated. UHMWPE polymer samples were bombarded with 150 keV N2ions under vacuum at room temperature to high fluences ranging from 1x1016to 2x1017ions cm-2. The untreated as well as treated samples were investigated by ultraviolet-visible (UV-Vis) spectrophotometer and Vickers micro-hardness techniques. The direct and indirect optical band gap decreased from 2.9 and 1.65 eV for pristine sample to 1.7 and 1 eV for those bombarded with N2ion beam at the highest

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Singh, Rajeev, and Anuradha Yadav. "Humidity Sensing Analysis of Zn_xCo_2−xO₄ (0.0 ≤ x ≤ 1.0) Nanocomposite Solid State, Thin and Thick Film Sensors at Room Temperature." Energy and Environment Focus 7, no. 3 (2023): 295–303. http://dx.doi.org/10.1166/eef.2023.1296.

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This paper reports the performance of the humidity sensing properties of cobalt zincate nanocomposite synthesized via conventional precipitation method. X-ray diffraction (XRD) outline revealed amorphous nature of nanocomposite. Scanning Electron Microscopy (SEM) images show sphere-shaped morphology all over the surface. Optical characterization of the film was carried out by Ultra Violet (UV)-visible spectrophotometer. By Tauc plot the estimated value of band gap of the film was found 3.81 eV. The variations in electrical resistance of the pellet and films were measured with change in Relativ

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