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Journal articles on the topic 'Gravimetric Reagents'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Acanski, Marijana. "Comparation of fundamental analytical methods for quantitative determination of copper(II)ion." Chemical Industry 62, no. 2 (2008): 85–89. http://dx.doi.org/10.2298/hemind0802085a.

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Copper is a ductile metal with excellent electrical conductivity, and finds extensive use as an electrical conductor, heat conductor, as a building material, and as a component of various alloys. In this work accuracy of methods for quantitative determination (gravimetric and titrimetric methods of analysis) of copper(II) ion was studied. Gravimetric methods do not require a calibration or standardization step (as all other analytical procedures except coulometry do) because the results are calculated directly from the experimental data and molar masses. Thus, when only one or two samples are

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2

Gurbanov, Huseyn R., and Aysel V. Gasimzade. "Study on efficiency of new multifunctional compositions for preparation of oil for transportation." Voprosy Khimii i Khimicheskoi Tekhnologii, no. 4 (July 2023): 41–50. http://dx.doi.org/10.32434/0321-4095-2023-149-4-41-50.

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We studied the effect of individual reagents and new compositions on demulsification of stable water-oil emulsions produced from the wells of Muradkhanli and Balakhani fields, SOCAR. The corrosion protection effect of three new compositions designated as A, B and C in water-oil emulsion, as well as the effect of surface tension on freezing temperature are discussed in the article. Composition A contained the reagents ND-12 and Alkan, composition B contained reagents ND-12 and Gossypol resin, and composition C contained the reagents BAF, ND-12, Gossypol resin and Dissolvan-4411. Physical and ch

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3

Fedorova, А. Yu, and Е. N. Bushuev. "The evaluation of corrosion rate of steel during chemical cleaning of steam boilers." Vestnik IGEU, no. 6 (2019): 21–29. http://dx.doi.org/10.17588/2072-2672.2019.6.021-029.

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Traditional and new washing acid reagents are used for chemical cleaning of internal surfaces of steam-water pipes of boilers. In previous studies, the rate of removal of lumpy and uniform deposits in the evaporative pipes of high-pressure steam boilers depending on the type of cleaning solution and the duration of cleaning was obtained. However, during chemical cleaning, removing deposits is accompanied by corrosion processes of the metal pipes, which leads to their loss. In the scientific and technical literature there are practically no data characterizing this process when using new deterg

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Astafyev, Alexandr, Evgeniy Nikolaev, Elena Lysenko, and Anatoly P. Surzhikov. "X-Ray and Thermogravimetric Analyzes of Mechanically Activated Nickel Ferrites." Materials Science Forum 970 (September 2019): 17–23. http://dx.doi.org/10.4028/www.scientific.net/msf.970.17.

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This article shows a study of the effect of mechanical activation of the initial mixture of reagents NiO and Fe2O3 at different speeds of grinding bowl rotation on synthesis of nickel ferrite. Nickel ferrite was produced by the solid-phase synthesis at a temperature of 900 °C for 240 minutes. The obtained ferrite samples were investigated by thermal gravimetric and X-ray phase analysis. The Curie temperature values are obtained, as well as the magnitude of the change of detected instrument weight at the magnetic phase transition (ferromagnetic-paramagnetic) of nickel ferrite using thermal grav

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V., V. BALAKRISHNA, and APPALA RAJU N. "Gravimetric Determination of Palladium(Il), Copper(II) and Nickel(Il), and Palladium(Il), Copper(Il) and Manganese(II) from Ternary Mixtures, using 2-Hydroxy- I -acetonaphthoneoxime and I-Hydroxy-2-acetonaphthoneoxime." Journal of Indian Chemical Society Vol. 63, May 1986 (1986): 512–14. https://doi.org/10.5281/zenodo.6296740.

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Depaitment of Chemistry, Sri Venkateswara University Post-Graduate Centre, Kurnool-518 001 Department of Chemistry, Sri Venkateswara University, Tirupati-517 502 <em>Manuscript received 30 July 1985, revised 24 February 1986, accepted 23 April 1986</em> 2-Hydroxy-1-acetonaphthoneoxime and its isomer 1-hydroxy-2-acetonaphthoneoxime have been used as reagents for the gravimetric determination of palladium(II), copper(II) and nickel(II) as well as palladium(II), copper(II) and manganese(II) from ternary mixtures. The results obtained are fairly accurate.

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Tereshchenko, Anatoly G. "Application of Hygroscopic Gravimetric Analysis Method in Isopiestic Measurements. Quality Control of Initial Reagents." Journal of Solution Chemistry 48, no. 3 (2018): 283–95. http://dx.doi.org/10.1007/s10953-018-0759-3.

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7

T., SAROJINI, and RAMACHANDRAIAH A. "Polydentate Carboxyamide Ligands as Analytical Reagents." Journal of Indian Chemical Society Vol. 70, Feb 1993 (1993): 138–41. https://doi.org/10.5281/zenodo.5910766.

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Department of Chemistry, Regional Engineering College, Warangal-506 004 <em>Manuscript received 26 May 1992, revised 11 November 1992, accepted 24 November 1992</em> Biphenyl bridged, binucleating and polydentate macromolecular ligand series, H<sub>2</sub>L, possessing two terminal -NH-CO-A- COOH, carboxyamide moieties (where A=-CH<sub>2</sub>-CH<sub>2</sub>-or -CH = CH- or <em>ortho</em>-phenylene linkage), has been synthesised and was found to be a set of potential analytical reagents as H<sub>2</sub>L suspensions for conductometric and pH-metric aqueous acid-base titrations on one band

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8

Bogacheva, Natalya V., Ksenia A. Tarbeeva, and Natalya Yu Ogorodova. "DEVELOPMENT OF STEP-BY-STEP METHOD FOR PRODUCING SILVER NANOPARTICLES BY CITRATE METHOD." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 5 (2020): 65–69. http://dx.doi.org/10.6060/ivkkt.20206305.6171.

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The article presents an algorithm for developing a step-by-step method for producing silver nanoparticles 30-35 nm in size, taking into account the establishment at each stage of the necessary ratio of concentrations and volumes of reagents. In the work, silver nitrate and sodium citrate anhydrous were used by «Sigma-Aldrich» (USA). All test solutions were prepared by the gravimetric method. To weigh the reagents, we used Adventurer electronic analytical balances («OHAUS», USA) (with a resolution of 0.0001 g). The size and density of silver nanoparticles were estimated using a JEM-1011 electro

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Yang, Han, Shuaiwei Dong, Zhiyong Sun, et al. "Catalpa ovata G. Don. potential medicinal value of leaves." Thermal Science 24, no. 3 Part A (2020): 1713–20. http://dx.doi.org/10.2298/tsci190609043y.

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Catalpa ovata G. Don. has a certain degree of appreciation because of its unique tree shape and wide crown. It also has certain adaptability. This experiment uses organic materials such as Fourier transform infrared (FT-IR) spectroscopy, gas chromatography-mass spectrometer (GC-MS), learning content management system, thermal desorption - GC-MS, termal gravimetric analyzer and other modern techniques to extract organic reagents from Catalpa ovata G. Don?s Leaves. The original powder was tested differently and analyzed, investigated. To explored and developed its potential medicinal value, and

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Magadova, L. A., K. A. Poteshkina, V. D. Vlasova, M. S. Pilipenko, and V. Y. Fineshina. "Investigation of Carbon Dioxide Corrosion Inhibitors for Steel for Use in Oil and Gas Production." Oil and Gas Technologies 129, no. 4 (2020): 14–18. http://dx.doi.org/10.32935/1815-2600-2020-129-4-14-18.

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The effect of carbon dioxide corrosion on the pipeline transport system and its protection methods are considered in this article. The corrosion inhibitors represented by imidazoline-based compositions and industrial samples of corrosion inhibitors are used as protective reagents, and the model of produced water saturated with carbon dioxide is used as an aggressive environment. The protective properties of inhibitors and the corrosion rate were evaluated by gravimetric analysis. The paper presents the results of the study of industrial samples and inhibitory compositions developed on the basi

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Thalhofer, Thomas, Mauro Keck, Sebastian Kibler, and Oliver Hayden. "Capacitive Sensor and Alternating Drive Mixing for Microfluidic Applications Using Micro Diaphragm Pumps." Sensors 22, no. 3 (2022): 1273. http://dx.doi.org/10.3390/s22031273.

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Microfluidic systems are of paramount importance in various fields such as medicine, biology, and pharmacy. Despite the plethora of methods, accurate dosing and mixing of small doses of liquid reagents remain challenges for microfluidics. In this paper, we present a microfluidic device that uses two micro pumps and an alternating drive pattern to fill a microchannel. With a capacitive sensor system, we monitored the fluid process and controlled the micro pumps. In a first experiment, the system was set up to generate a 1:1 mixture between two fluids while using a range of fluid packet sizes fr

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Jin, Huile, Yuewu Zhao, Liyun Chen, Aili Liu, Shun Wang, and Weizhong Jiang. "One-step synthesis of metal sulfide/tellurium composites with distinct microstructures." Canadian Journal of Chemistry 93, no. 10 (2015): 1076–82. http://dx.doi.org/10.1139/cjc-2015-0117.

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Microsphere flower- and mushroom-shaped metal sulfide/tellurium composites were synthesized through a one-step and template-free approach in which the simultaneous formation of tellurium and NiS (or CdS) leads to well-dispersed composites. The development of such distinct microstructures has been systematically investigated as a function of reaction temperature, concentrations of the starting reagents, and reaction time. Characterizations with scanning and transmitting electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and thermal gravimetric methods i

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Yakovleva, A. A., S. V. Sadlovsky, N. I. Vostrikova, and V. V. Khalbaev. "Characteristics of latex coatings for steel protection against corrosion." iPolytech Journal 26, no. 4 (2023): 709–13. http://dx.doi.org/10.21285/1814-3520-2022-4-709-713.

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This paper examines the kinetics of corrosion for steel St3 samples covered with a latex coating 69B–2k, manufactured by Kapitel LLC (Irkutsk), by analysing gravimetric tests performed using steel samples. A 3 wt % solution of sodium chloride was used as an electrolyte. The accuracy of the obtained results was confirmed by carrying out at least two parallel experiments. Prior to coating, the metal surface of samples was carefully prepared as per GOST R 9.907-2007. Film coatings were applied onto the metal surface by threefold dipping of samples in liquid latex followed by drying within 24 hour

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Bouzón, Noelia, Alba Font, María Victoria Borrachero, et al. "Evaluation of Thermochemical Treatments for Rice Husk Ash Valorisation as a Source of Silica in Preparing Geopolymers." Materials 16, no. 13 (2023): 4667. http://dx.doi.org/10.3390/ma16134667.

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The use of geopolymers has revolutionized research in the field of construction. Although their carbon footprint is often lower than that of traditional mortars with Portland cement, activators such as sodium silicate have a high environmental impact in the manufacturing of materials. Employing alternative alkali sources to produce geopolymers is necessary to obtain materials with a lower carbon footprint. The present research explores the use of rice husk ash (RHA) as an alternative source of silica to produce alkaline activators by four methods: reflux; high pressure and temperature reaction

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Huang, Ching-Cheng. "Decellularized liver-regenerative 3D printing biomaterials for cell-based liver therapies via a designed procedure combining supercritical fluids with papain-containing reagents." Bio-Medical Materials and Engineering 33, no. 2 (2022): 139–46. http://dx.doi.org/10.3233/bme-211303.

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BACKGROUND: The biologic scaffolds derived from decellularized tissues and organs have been successfully developed in a variety of preclinical and/or clinical studies. OBJECTIVE: The new decellularized liver-regenerative 3D printing biomaterials were designed and prepared for cell-based liver therapies. METHODS: An extraction process was employed to remove the tissue and cellular molecules from porcine liver via pretreatment of supercritical fluid of carbon dioxide (ScCO2). Varying porosities of the decellularized liver tissues were created using papain-containing reagent treatments after ScCO

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Meng, Xiao Xiao, Feng Lin He, Jiang Ying Shen, and Xiang Qian Shen. "Structure and Catalytic Soot Combustion of Perovskite La-Mn-O Hollow Microfibers via Gel-Precursor Transformation Process." Advanced Materials Research 538-541 (June 2012): 2289–92. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.2289.

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The nanocrystalline perovskite La-Mn-O hollow microfibers were prepared by the gel-precursor transformation process from reagents of metal salts and citric acid. The gel precursor and resultant products were characterized by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. The specific surface area was measured by the Brunauere-Emmette-Teller method. The catalytic performance of soot combustion was evaluated by thermo-gravimetric analysis under model conditions. The nanocrystalline La-Mn-O hollow microfibers calcined at 650 °C for 6 h are characteriz

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Korolev, Slava, and Alexsander Lavrov. "Research and technological testing of ores with dispersed gold of the Yellow Jacket Deposit." E3S Web of Conferences 192 (2020): 02027. http://dx.doi.org/10.1051/e3sconf/202019202027.

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The article discusses the mineral and geochemical features of the yellow Jacket ore Deposit located in Clark County, Nevada. Тhe Deposit differs significantly in many mineral and geochemical features from the deposits of dispersed gold ores belonging to the so-called Karlin formation type in compacted and locally weakly metamorphosed strata of carbonate rocks, mudstones and carbonated shales (carbonated turbidites). Positive results of analyses, including those with a cupellation (gravimetric) termination, were obtained in laboratories using non-standard approaches to sample preparation. Based

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Ezzeldin, Hesham A., Allen Apblett, and Gary L. Foutch. "Synthesis and Properties of Anion Exchangers Derived from Chloromethyl Styrene Codivinylbenzene and Their Use in Water Treatment." International Journal of Polymer Science 2010 (2010): 1–9. http://dx.doi.org/10.1155/2010/684051.

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Amination of vinylbenzyl chloride-divinylbenzene (VBC-DVB) copolymers is an effective method for preparation of ion-exchange resins. Conventionally, the starting polymer is produced by chloromethylation of a styrene-divinylbenzene copolymer that utilizes chloromethyl methyl ether, a known carcinogen. An alterative approach is to copolymerize vinylbenzyl chloride with divinylbenzene to generate the necessary VBC-DVB. This method provides precise control over the density of the ion-exchange groups. The regiochemistry of the vinylbenzyl chloride methods was realized using solvent-ion exchange gro

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Wang, Hui, Qian Jin Mao, Su Ping Cui, Liang Jing Zhang, and Ming Zhang Lan. "Study on the Volatility of Organic Contaminated Soil from Tar Workshop." Key Engineering Materials 509 (April 2012): 93–98. http://dx.doi.org/10.4028/www.scientific.net/kem.509.93.

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The pollution soil from tar workshop’s foundation soil in a steel work, first of all, the main organic pollutants in pollution soil are examined by the Pony Test Center. Then, the volatility of the pollution soil at different temperature was studied by thermo gravimetric (TG) analysis coupled with Fourier transform infrared spectroscopy (FTIR). At last, by adding standard reagents of PAHs respectively, their volatility of different temperature period was confirmed. The results indicated that the main organic pollutants in the contaminated soil were fluorene, acenaphthene, phenanthrene, fluoran

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Lee, Jong-Hoon, Seul-Yi Lee, and Soo-Jin Park. "Highly Porous Carbon Aerogels for High-Performance Supercapacitor Electrodes." Nanomaterials 13, no. 5 (2023): 817. http://dx.doi.org/10.3390/nano13050817.

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In recent years, porous carbon materials with high specific surface area and porosity have been developed to meet the commercial demands of supercapacitor applications. Carbon aerogels (CAs) with three-dimensional porous networks are promising materials for electrochemical energy storage applications. Physical activation using gaseous reagents provides controllable and eco-friendly processes due to homogeneous gas phase reaction and removal of unnecessary residue, whereas chemical activation produced wastes. In this work, we have prepared porous CAs activated by gaseous carbon dioxide, with ef

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Kumov, Elisa Pizzaia Goltz, and Victor Gonçalves Cremonez. "Instant Determination of Moisture and Bulk Density of Woodchips in Cellulose Industry." Revista de Gestão Social e Ambiental 18, no. 2 (2023): e04313. http://dx.doi.org/10.24857/rgsa.v18n2-007.

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Purpose: This research aims to achieve the instantaneous determination of moisture content and bulk density of wood chips for energy generation and pulp production in the pulp and paper industry. Theoretical framework: The moisture content and bulk density of woodchips influence the quality of biomass for energy generation and cellulose production in various ways. These variables affect the calorific value, mass and volume of logistical transport, the quantity of reagents in the reactor for wood delignification, among other factors. For this reason, a quick and accurate evaluation of these fac

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Rony, FK, SK Ray, A. Hoque, et al. "Zinc stearate from galvanizing waste materials and its use as thermal stabilizer in PVC industries." Bangladesh Journal of Scientific and Industrial Research 51, no. 4 (2016): 261–70. http://dx.doi.org/10.3329/bjsir.v51i4.30443.

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Galvanizing industries of Bangladesh produce profuse amount of environmentally hazardous solid waste materials like zinc dross which contains significant amount of valuable zinc and harmful heavy lead. Zinc was extracted as zinc chloride (ZnCl2) from zinc dross. Zinc stearate (ZnSt2) samples were prepared by precipitation method from stearic acid, sodium hydroxide and ZnCl2 by varying the amount of the reagents and product yield found within the range 96.06-99.18%. Characteristic peaks of ZnSt2 were investigated by Fourier Transform Infrared Spectroscopy (FTIR). Differential Scanning Calorimet

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Jerome, F. N., Obiukwu, O. O., Okonkwo, B. U., et al. "Investigation of Several Bio Wastes as Sustainable Carbon Materials for Supercapacitor Manufacturing." Asian Journal of Current Research 9, no. 1 (2024): 13–37. http://dx.doi.org/10.56557/ajocr/2024/v9i18490.

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This work presents various inquests on the utilization of bio wastes, agricultural wastes and sea shells to develop activated carbon as a veritable and sustainable electrode (terminals) substance for supercapacitors-(SC) also known as electrochemical double layer capacitors (EDLC) gadgets for preserving energy. We also looked at how electrode materials are processed with a view to improve or maximise the supercapacitor performance. This review entails how several bio wastes has been singed, synthesized and utilized to produce activated carbon material for long lasting, low-cost and environment

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ADEGBENRO, OMOTOSO, PETER O. AIYEDUN, OLAYIDE R. ADETUNJI, TOYIN A. AROWOLO, and FEMI T. OWOEYE. "CORROSION PERFORMANCE OF 1014 MILD AND 304 STAINLESS STEELS IN ACIDIC MEDIA." Journal of Natural Sciences Engineering and Technology 16, no. 1 (2017): 83–92. http://dx.doi.org/10.51406/jnset.v16i1.1805.

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Corrosion is a degradation of metallic materials under the action of the environment which requires oxygen and moisture to occur. This research work determined the corrosion performance of 1014 low carbon and 304 austenitic stainless steels in different concentration of acidic media. Corrosion tests were carried out using gravimetric technique. One hundred and eighty samples of the metals were prepared and immersed in containers of sulphuric acid (H2SO4), hydrochloric acid (HCl) and nitric acid (HNO3) at 1, 2 & 3 M. The samples were then removed every three days for a period of 15 days to

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GAIDAR, S. M. "Study of the properties of ethanolamine and boric acid interaction products as volatile corrosion inhibitors used to protect ferrous and non-ferrous metals." Agricultural Engineering, no. 2 (2025): 63–69. https://doi.org/10.26897/2687-1149-2025-2-63-69.

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Ethanolamine with boric acid can form various products, but there have not been any comprehensive studies on their properties as volatile corrosion inhibitors. The aim of thisstudy wasto synthesize products of interaction between ethanolamine and boric acid and to analyze anticorrosion properties of the obtained substances on ferrous and non-ferrous metals. To determine the composition and conditionsfor obtaining an inhibitor with high anticorrosion properties, the authors conducted experiments with a variable ratio of reagents and reaction temperature. As a result, they developed methodsfor o

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Sadeghi, Meisam, Zahra Moghimifar, P. Senthil Kumar, Hamedreza Javadian, and Majid Farsadrooh. "Fabrication of Poly (Acrylonitrile-Co-Methyl Methacrylate) Nanofibers Containing Boron via Electrospinning Method: A Study on Size Distribution, Thermal, Crystalline, and Mechanical Strength Properties." Sustainability 13, no. 8 (2021): 4342. http://dx.doi.org/10.3390/su13084342.

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Electrospun polymeric nanofibers have attracted great attention in filtration systems and protective clothes. One of them is polyacrylonitrile (PAN) nanofibers, which are a suitable choice for the fabrication of protective clothes in the defense industry, due to their good fiber formation and easy optimization with chemical reagents. They do not possess adequate properties for protection against chemical, biological, and radiological agents. In this research, poly (acrylonitrile-co-methyl methacrylate) (PANMM) nanofibers and PANMM nanofibers containing 10B were fabricated via the electrospinni

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Chernigov, D. A., A. V. Bogorodskiy, R. N. Nabiulin, and T. S. Mineeva. "Research into thickening processes of concentrates of gold-bearing ores." Proceedings of Irkutsk State Technical University 25, no. 3 (2021): 391–401. http://dx.doi.org/10.21285/1814-3520-2021-3-391-401.

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The aim was to improve the thickening of an ultra-fine flotation concentrate by efficient flocculants when processing refractory sulphide gold-bearing ores from South Urals deposits. The chemical ore composition was studied using gravimetric, atomic absorption, chemical, X-ray fluorescent, assay test and electron microprobe analytical methods. Particle size analysis of the ultra-fine flotation concentrate under study was performed using a Malvern Hydro Mastersizer 2000MU analyser (Malvern Panalytical Ltd, UK). In thickening experiments, samples with the same composition after the ultra-fine gr

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Illarionov, I. E., Sh V. Sadetdinov, V. N. Gadalov, O. M. Gubanov, and Yu V. Skripkina. "Study, improvement and evaluation of electro-corrosion resistance of highly effective inhibitory compositions." Glavnyj mekhanik (Chief Mechanic), no. 9 (July 28, 2021): 54–61. http://dx.doi.org/10.33920/pro-2-2109-05.

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The studies on the improvement of boron nitrogen-containing compounds, as well as information on phase transformations in the system H3BO3-C3H4N2-H2O, based on the solubility isotherms consisting of three branches, are presented. Based on the analysis of the second branch, a new boratimidazole compound was found. A full description of its properties is given. Furthermore, the paper presents the studies on the effect of boratimidazole and emidazole on the corrosive electrolytic behavior and the main characteristics of the cyclic strength of pre-eutectoid carbon steel in neutral media. It is fou

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Illarionov, I. E., Sh V. Sadetdinov, V. N. Gadalov, O. M. Gubanov, and Yu V. Skripkina. "Study, improvement and evaluation of electro-corrosion resistance of highly effective inhibitory compositions." Glavnyj mekhanik (Chief Mechanic), no. 9 (July 28, 2021): 54–61. http://dx.doi.org/10.33920/pro-2-2109-05.

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The studies on the improvement of boron nitrogen-containing compounds, as well as information on phase transformations in the system H3BO3-C3H4N2-H2O, based on the solubility isotherms consisting of three branches, are presented. Based on the analysis of the second branch, a new boratimidazole compound was found. A full description of its properties is given. Furthermore, the paper presents the studies on the effect of boratimidazole and emidazole on the corrosive electrolytic behavior and the main characteristics of the cyclic strength of pre-eutectoid carbon steel in neutral media. It is fou

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Katkova, Svetlana S., and Vera I. Levashova. "SYNTHESIS AND STUDY OF INHIBITORY PROPERTIES OF QATERNARY AMMONIUM SALTS BASED ON AMINOETHYLETHANOLAMINE." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 3 (2017): 72. http://dx.doi.org/10.6060/tcct.2017603.5484.

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This article is devoted to the topical today biological corrosion problem of steel under the conditions of production, transportation and refining. The characteristics of corrosion caused by the vital activity of sulfate-reducing bacteria were analyzed. The article seeks to examine the effectiveness of new ammonium salts based on aminoethylethanolamine as reagents possessing inhibitory and antibacterial properties. The main content of the research is the analysis of the synthesis of new compounds based on ammonium aminoethylethanolamine and benzyl chloride. The optimal conditions of the synthe

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Hu, Sheng, Shu Chen, Robert Menzel, et al. "Aqueous dispersions of oligomer-grafted carbon nanomaterials with controlled surface charge and minimal framework damage." Faraday Discuss. 173 (2014): 273–85. http://dx.doi.org/10.1039/c4fd00116h.

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Functionalised carbon nanomaterials (CNMs), with an undamaged carbon framework and controlled physiochemical properties, are desirable for a wide range of scientific studies and commercial applications. The use of a thermochemical grafting approach provides a versatile means to functionalise both multi-walled carbon nanotubes (MWCNTs) and carbon black (CB) nanoparticles without altering their inherent structures. The functionalisation process was investigated by employing various types of grafting monomers; to improve water solubility, reagents were chosen that introduced an ionic character ei

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Gurbanov, Guseyn R., Aysel V. Gasimzade, and Samira F. Alikishiyeva-Balamiyeva. "Research of bactericide-inhibitor properties of new compositions based on gossypol resin and chloroprene." Nafta-Gaz 81, no. 1 (2025): 58–66. https://doi.org/10.18668/ng.2025.01.05.

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Five new compositions with conventional names A-1, A-2, A-3, A-4, and A-5 were prepared using different ratios of chloroprene and gossypol resin reagents, and their corrosion-inhibitory properties were investigated. The sulfate-reducing bacteria Desulfomicrobium genus and Desulfovibrio desulfuricans species were employed in the study. The effects of the A-series compositions on the bacteria were observed over a 15-day period, during which concentrations of 50, 100, 150, and 200 g/t were tested. Analysis of the results from numerous experiments revealed that the A-3 composition exhibited the hi

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Ximenis, Virgolie Diknas, Refli Refli, Djeffry Amalo, Alfred Dima, Rony Mauboy, and Maria Ruma. "The Activity of Lenglengan Leaf Extract (Leucas lavandulifolia Sm.) as an Antibacterial for Staphylococcus aureus." Jurnal Biologi Tropis 22, no. 2 (2022): 461–70. http://dx.doi.org/10.29303/jbt.v22i2.3351.

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Dafala village is one of the villages in NTT that uses lenglengan leaves as traditional medicine to treat diseases such as coughs, TBC, diarrhea and back pain.This present research aims to know the bioactive compounds and composition of the bioactive contained in Lenglengan (Leucas lavandulifolia Sm.) leaf extract, and too know the effectiveness of lenglengan leaf extract in inhibiting Staphyloccocus areus bacteria. We extracted leaves of Lenglengan by maceration method using ethanol. The extract was obtained and then tested in a qualitative way to determine the bioactive compounds are made by

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Popov, V. S., T. V. Shelenga, O. N. Kovaleva, and V. I. Khoreva. "Methodological aspects of using NIR spectroscopy to assess biochemical indicators in barley grain." Proceedings on applied botany, genetics and breeding 185, no. 1 (2024): 109–17. http://dx.doi.org/10.30901/2227-8834-2024-1-109-117.

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Background. The possibility of applying near-infrared reflectance (NIR) spectroscopy for rapid assessment of various biochemical parameters in barley varieties and forms is discussed. The data obtained by the Biochemistry and Molecular Biology Department of VIR served to construct calibration models for the content of protein, starch, oil, beta-glucans, and total phenolic compounds (PhC) in grain, facilitating further screening of various barley samples.Materials and methods. The chemical composition of grain was studied in naked and covered spring barley (Hordeum vulgare L.) accessions grown

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35

Fot, Kirill S., Valeriya E. Tkacheva, Ilshat F. Garfutdinov, and Andrey N. Markin. "EFFECTIVE DOSAGE OF CORROSION INHIBITORS FOR OILFIELD EQUIPMENT PROTECTION FROM LOCALIZED CARBON DIOXIDE CORROSION." Oil and Gas Business, no. 5 (November 8, 2024): 193–220. http://dx.doi.org/10.17122/ogbus-2024-5-193-220.

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The article presents the results of laboratory tests of the industrial corrosion inhibitor VITERASOYUZ-2000 of the BP-2 brand (class of imidazolines) used in the oil and gas industry. In 2021, one of the vertically integrated companies purchased 20 thousand tons of this reagent, which is 10 % of the total purchased volume. The volume of corrosion inhibitors purchased by the company annually (~ 200 thousand t) is 97 % a product of domestic manufacturers. The main line of inhibitors purchased in 2021 is represented by the following brands: Sonkor (> 40 thousand t), Azol (~ 40 thousand t), Kor

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Rahman, Nurdin, and Nurhanifah Muthmainnah Nurdin. "Phytochemicals, Nutrient Levels and Antioxidants of Various Types of Sweet Potatoes (Ipomoea batatas L.)." Poltekita : Jurnal Ilmu Kesehatan 17, no. 2 (2023): 301–8. http://dx.doi.org/10.33860/jik.v17i2.2701.

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This study aims to identify the phytochemical compounds, including flavonoids, tannins, phenols, beta-carotene, anthocyanins, and fiber, as well as the antioxidant capacity of various types of sweet potatoes. Method: The research followed a descriptive observational design with laboratory-based testing. The identification of phytochemical compounds utilized specific reagents. One Way ANOVA was employed to assess the differences in average levels of phytochemicals, nutrients, and antioxidant capacity (IC50) among the different types of sweet potatoes with normally distributed data. The determin

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37

Shakhmaev, Rinat N., Alisa Sh Sunagatullina, and Vladimir V. Zorin. "ISOMERS OF 3-CHLORO-N,N,N-TRIS(3-METHYLBUTYL)PROP-2-EN-1-AMMINIUM CHLORIDE AS COMPLEX OIL AND GAS FIELD REAGENTS WITH ANTIHYDRATE, ANTICORROSIVE AND BACTERICIDAL ACTION." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 6 (2020): 80–84. http://dx.doi.org/10.6060/ivkkt.20206306.5969.

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One of the most promising classes of low-dosage hydrate inhibitors is anti-agglomerants, which are favorably characterized by high efficacy at very low working concentrations (0.1-0.5%). We have investigated the possibility of creating new anti-agglomerants with enhanced anticorrosive and bactericidal properties based on the quaternization of tris(3-methylbutyl)amine with (E)- and (Z)-1,3-dichloropropene isomers. It is well known that compounds with a 3-chloroprop-2-enyl fragment have a pronounced anticorrosive and bactericidal action. Thus, the presence in the quaternization products of isope

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N., THANKARAJAN, and MOHANAN K. "Potassium N-(2-Hydroxy-l-naphthylidene) glycinate as a Gravimetric Reagent for Thorium(IV)." Journal of Indian Chemical Society Vol. 62, Jan 1985 (1985): 81–82. https://doi.org/10.5281/zenodo.6318386.

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Department of Chemistry, University of Calicut, Kerala-673 635 <em>Manuscript received 23 July 1984, accepted 19 January 1985</em> Potassium <em>N</em>-(2-Hydroxy-l-naphthylidene) glycinate as a Gravimetric Reagent for Thorium(IV).

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39

Khaydarova, Guzel R., Anton S. Tyusenkov, Dmitry E. Bugai, Gulnara Z. Raskildina, Aigul A. Islamutdinova, and Georgy M. Sidorov. "DEVELOPMENT AND TESTING OF CORROSION INHIBITORS PROPERTIES BASED ON QUATERNARY AMMONIUM COMPOUNDS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 7 (2018): 130. http://dx.doi.org/10.6060/ivkkt.20186107.5710.

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Corrosion inhibitors are widely used for protection of technological equipment and pipelines in the oil and gas industry. However, the operation of these objects under the influence of corrosive media of high aggressiveness and the widespread use of new constructive materials call for development of increasingly effective reagents. In this regard, the creation of competitive inhibitors that provide a high protective effect is a very urgent task, the solution of which is of significant importance for the country's economy. The paper considers the synthesis of new corrosion inhibitors based on q

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Limbachiya, Nilesh G., and A. G. Mehta A. G. Mehta. "2'-Hydroxy-4'-Methoxychalcone Oxime [HMCO] as A Gravimetric and Spectrophotometric Reagent for The Determination of Cu(II)." Indian Journal of Applied Research 4, no. 6 (2011): 1–2. http://dx.doi.org/10.15373/2249555x/june2014/182.

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SHREESH, BHARDWAJ, N. ANSARI MOHD., and C. JAIN MAHESH. "Bis-4-phthalianilic Acid Sulphone : A New Specific Gravimetric Reagent for Copper(II)." Journal of Indian Chemical Society Vol. 67, May 1990 (1990): 441–42. https://doi.org/10.5281/zenodo.6298967.

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Department of Chemistry, S. D. (P. G.) College, Muzaffarnagar-251 001 <em>Manuscript received 7 February 1989, revised 11 December 1989, accepted 21 December 1989</em> Bis-4-phthalianilic Acid Sulphone : A New Specific Gravimetric Reagent for Copper(II) 

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42

Grigoriev, A. M., Yu B. Basok, A. D. Kirillova, et al. "Cryogenically structured gelatin-based hydrogel as a resorbable macroporous matrix for biomedical technologies." Russian Journal of Transplantology and Artificial Organs 24, no. 2 (2022): 83–93. http://dx.doi.org/10.15825/1995-1191-2022-2-83-93.

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Objective: to investigate the biological properties of a matrix made of cryogenically structured hydrogel in the form of a macroporous gelatin sponge, as well as the possibility of creating cell-engineered constructs (CECs) on its basis. Materials and methods. The main components of the cryogenically structured hydrogel were gelatin (type A) obtained from porcine skin collagen, N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide, (EDC) and urea (all from Sigma-Aldrich, USA). Surface morphology was examined using scanning electron microscopy (SEM). The degree of swelling in water of the samples was

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Anca, Ganescu, Simionescu Andreea, and Dumitru Mihaela-Gabriela. "Dioximates of transitional metals. Syntheses, characterizations, applications." Annals of the University of Craiova Series Chemistry 29, no. 2 (2023): 56–59. http://dx.doi.org/10.52846/aucchem.2023.2.14.

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Several derivates of α benzyldioxime with nickel, platinum and palladium are known to have been synthesized by Ciugaev, and later by F.P.Dwyer and D.P.Mallor. Recently, this reagent has found a wide use for the gravimetric determination of palladium and nickel, especially in semi-microanalysis, because the solubility of the respective chelate formed with α benzyldioxime is lower, and the gravimetric factor has a more appropriate value than in the case of analog derivates of dimethylglyoxime.

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Shingadia, S. K., and K. K. Desai. "2-Hydroxy-5-methylbenzophenone oxime(HMBO) as an Analytical Reagent for Gravimetric Determination of Cu(II)." E-Journal of Chemistry 4, no. 1 (2007): 97–102. http://dx.doi.org/10.1155/2007/459181.

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2-Hydroxy-5-methylbenzophenone oxime (HMBO) was developed as a new analytical reagent for the gravimetric determination of divalent copper ion. In pH rang of 3.0 to 6.0, the reagent gives a buff colored precipitate with Cu(II). Job’s method and mole ratio method revealed that the stoichiometry of the complex is 1:2 (metal: ligand). Beer’s law is obeyed up to 61.25 ppm of Cu(II). Molar absorptivity and Sandell’s sensitivity at 400 nm were found to be 6.32 × 102L mol-1cm-1and 0.359 μg/cm2respectively. The stability constant of Cu(II)-HMBO complex is found to be 2.43 × 109. Gibb’s free energy cha

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Pal, T. "N,N'-diphenyldithiomalonamide as a gravimetric reagent for nickel and cobalt." Talanta 33, no. 12 (1986): 973–77. http://dx.doi.org/10.1016/0039-9140(86)80236-3.

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46

Krishna Purohit, Miss, and K. K. Desai. "2-Hydroxy-4-Methoxybenzophenone Oxime as an Analytical Reagent for Copper(II)." E-Journal of Chemistry 2, no. 2 (2005): 161–64. http://dx.doi.org/10.1155/2005/825847.

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2-Hydroxy-4-methoxybenzophenoneoxime (HMBO) was developed as a new analytical reagent for the gravimetric determination of Cu(II). In pH 2.5-9.0 the reagent gives brown coloured precipitate with Cu(II). Spectrophotometric methods revealed that the stoichiometry of the complex is 1:2 (metal: ligand). Beer's law is obeyed up to 31.75 ppm of Cu(II). Molar absorptivity and Sandell's sensitivity at 400 nm were found to be 7.0×102L mol-1cm-1and 0.090 μg/cm2respectively. The stability constant of Cu(II)-HMBO complex is found to be 6.13×109. Gibb’s free energy change for complex formation reaction was

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47

Nair, Ambily P., and J. Christine. "2-Hydroxy-4-n-propoxy-5-bromoacetophenone oxime as an Analytical Reagent for Gravimetric Determination of V(V)." E-Journal of Chemistry 6, no. 2 (2009): 303–7. http://dx.doi.org/10.1155/2009/129832.

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2-Hydroxy-4-n-propoxy-5-bromoacetophenone oxime (HnPBAO) was developed as a new analytical reagent for the gravimetric determination of pentavalent vanadium ion. In the pH range 4.0-6.0, the reagent gave a brown coloured precipitate with V(V). Job’s method and Mole ratio method revealed that the stoichiometry of the complex is 1:1 (metal: ligand). Beer’s law is obeyed up to 20.38 ppm of V(V). Molar absorptivity and Sandells sensitivity at 450 nm were found to be 10.22 × 102L/mol/cm and 0.049 µg/cm2respectively. The stability constant of V(V)-HnPBAO complex is found to be 1.195 × 106. Gibb’s fr

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K., B. SARAN, C. ROY B., and LAHIRI S. "3-(p-Acetophenyl)-1-phenyltriazene-N-oxide. A New Reagent for Gravimetric Determination of Nickei(II) and Palladium(ll) and their Separation from Binary Mixture." Journal of Indian Chemical Society Vol. 63, May 1996 (1986): 532–33. https://doi.org/10.5281/zenodo.6276034.

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Department of Chemistry, Jadavpur University, Calcutta-700 032 <em>Manuscript received 11 May 1982, revised 25 February 1986, accepted 31 March 1986</em> 3-(<em>p</em>-Acetophenyl)-1-phenyltriazene-<em>N</em>-oxide. A New Reagent for Gravimetric Determination of Nickei(II) and Palladium(ll) and their Separation from Binary Mixture.

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R., K. UPADHYAY, VERMA MAYA, and AGARWAL NAMITA. "Application of p-Dimethylaminoanil of 2-Thiopheneglyoxal in Gravimetric Estimation of Ruthenium(III), Rhodium(III), lridium(III) and Platinum(IV)." Journal of Indian Chemical Society Vol. 64, Apr 1987 (1987): 241–42. https://doi.org/10.5281/zenodo.6216383.

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Chemistry Department, N. R. E. C. College, Khurja-203 131 <em>Manuscript received 10 July 1986, revised 18 March 1987, accepted 22 April 1987</em> <em>p</em>-Dimethylaminoanil of 2-thiopheneglyoxal, which precipitates several platinum metal ions in alkaline medium at different pH, has been used as gravimetric reagent in the estimation of Ru<sup>III</sup><em>, </em>Rh<sup>III</sup>, Ir<sup>III</sup> and Pt<sup>IV</sup> cations individually.

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Fatibello-Filho, Orlando, Marcos Fernando de Souza Teixeira, and Antônio José Moraes Guaritá-Santos. "Gravimetric Determination of Saccharin in Some Sweetners Using Mercurous Nitrate as Reagent." Journal Of The Brazilian Chemical Society 4, no. 2 (1993): 69–71. http://dx.doi.org/10.5935/0103-5053.19930015.

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