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Journal articles on the topic 'Reagent system'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Meinardi, Ichwan, and Mansyur Arif. "KADAR KOLESTEROL HDL TERUKUR MENGGUNAKAN REAGEN CHOLESTEST N HDL DAN HDL-C PLUS GENERASI KETIGA." INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY 16, no. 2 (2018): 78. http://dx.doi.org/10.24293/ijcpml.v16i2.971.

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The using of the open reagent system tools gives the possibility to choose the best quality of reagents including the reagent for HDLcholesterol concentration test. Hitachi 902 (Roche) as an open reagent system tool may used Cholestest N HDL (Daichi) as the firstHDL reagent and HDL-C plus 3rd generation reagent (Roche). The aim of this study was to know the correlation of HDL cholesterolconcentrations using Cholestest N HDL and HDL-C plus 3rd generation reagents measured by Hitachi 902. A cross sectional study wasdone from April to June 2008 at Ratulangi Medical Centre Laboratory, Makassar. Th

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An, Jae-Seok, Ji-Na Kim, Kwang-Seo Park, Eun-Bit Joo, Sang-Hyuk Yoon, and Yoon-Cheol Kim. "A Study on the Comparison of One Step Method and Two Step Method to Improve Reporting of CA 19-9 Results." Korean Journal of Nuclear Medicine Technology 28, no. 1 (2024): 81–87. https://doi.org/10.12972/kjnmt.20240011.

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Purpose: CA 19-9 is the most widely used tumor marker for the diagnosis of digestive system tumor, especially pancreatic and biliary tract cancer. This study was conducted to improve the result value near reference range by comparing the reagents of CA 19-9 one step method and two step method. In addition, it was intended to establish a standard for selecting reagents. Material and Methods: 120 patients who visited the National Cancer Center in 2023 were selected as subjects for this study. The reagents used in the study were CA 19-9 IRMA kits (Shinjin, Korea) and three types of reagents were

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3

Hutagalung, I., and Mansyur Arif. "PENENTUAN KADAR LIPOPROTEIN RAPATAN TINGGI (HIGH DENSITY) DENGAN DUA PEREAKSI (REAGEN) BERBEDA MENGGUNAKAN HITACHI 902." INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY 15, no. 2 (2018): 46. http://dx.doi.org/10.24293/ijcpml.v15i2.941.

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Reagent selection is one of the factors that could influence the quality of laboratory results. The use of open system tools gives thepossibility to choose the best reagents, including the reagent for high density lipoprotein (HDL) determination. The aim of this studywas to compare HDL level determination using two different reagents measured by Hitachi 902. A cross sectional study was done fromJanuary to February 2007 in Ratulangi Medical Centre Laboratory, Makassar. From 47 samples we found that the mean HDL levelusing Daichi reagent was 50.47 mg/dl ranging from 45.99 mg/dl to 54.94 mg/dl an

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4

Esimbekova, Elena N., Maria A. Kirillova, and Valentina A. Kratasyuk. "Immobilization of Firefly Bioluminescent System: Development and Application of Reagents." Biosensors 13, no. 1 (2022): 47. http://dx.doi.org/10.3390/bios13010047.

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The present study describes the method of preparing reagents containing firefly luciferase (FLuc) and its substrate, D-luciferin, immobilized into gelatin gel separately or together. The addition of stabilizers dithiothreitol (DTT) and bovine serum albumin (BSA) to the reagent is a factor in achieving higher activity of reagents and their stability during storage. The use of immobilized reagents substantially simplifies the procedure of assay for microbial contamination. The mechanism of action of the reagents is based on the relationship between the intensity of the bioluminescent signal and

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Liu, Si Qing, Xiu Juan Li, Min Zhang, and Wan Ping Wang. "Fluorite Flotation of a Fluorite-Bearing Pb-Zn Tailings." Applied Mechanics and Materials 387 (August 2013): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amm.387.3.

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Beneficiation of a Pb-Zn tailings containing 44.98% CaF2 was conducted by flotation using sodium hexametaphosphate and new reagents S180. Details of reagent consumption, adding reagents at different stages and concentration of flotation pulp were investigated. Through all the investigation, an optimum reagent system and flowsheet were established. Finally, a marketable fluorite concentrate assaying 98.32% CaF2 with the recovery of 95.00% was obtained by one rougher,6 cleaners and 2 scavengers.

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Starostina, I. V., N. Yu Kiryushina, Yu L. Makridina, A. S. Lushnikov, and M. V. Ivanova. "Possibility and Prospects for Using Combined Coagulants-flocculants in the Urban Wastewater Treatment System." Ecology and Industry of Russia 28, no. 6 (2024): 24–29. http://dx.doi.org/10.18412/1816-0395-2024-6-24-29.

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A method is proposed for producing a powdered combined reagent, including an aluminum-silicon coagulant-flocculant, a sorption material and an acidity regulator of treated wastewater, as well as using this reagent in the treatment system of multi-component urban wastewater treatment plants. It has been shown that the use of powdered reagents of various compositions ensures purification efficiency for suspended solids in the range from 66.1 to 94.1 %, and for COD – from 70.1 to 78.0 %.

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Gril, Dominik, and Denis Donlagic. "A Microfluidic, Flow-Through, Liquid Reagent Fluorescence Sensor Applied to Oxygen Concentration Measurement." Sensors 23, no. 10 (2023): 4984. http://dx.doi.org/10.3390/s23104984.

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A concept of a microfluidic fluorescent chemical sensing system is presented and demonstrated as a sensor for measurement of dissolved oxygen in water. The system utilizes on-line mixing of a fluorescent reagent with the analyzed sample, while it measures the fluorescence decay time of the mixture. The system is built entirely out of silica capillaries and optical fibers, and allows for very low consumption of the reagent (of the order of mL/month) and the analyzed sample (of the order of L/month). The proposed system can, thus, be applied to continuous on-line measurements, while utilizing a

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8

Laptev, Anatoly, Andrey Golubev, Rustem Akhiyarov, Hurshejon Dzhumabaev, and Gayrat Bulatov. "Remote monitoring of reagent treatment of recycled water supply systems." EPJ Web of Conferences 318 (2025): 02009. https://doi.org/10.1051/epjconf/202531802009.

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A system for remote monitoring of the reagent treatment of the cooling water of a petrochemical enterprise has been developed, manufactured and tested. The system includes a controller in which signals from level sensors in reagent storage tanks, pH sensors and electrical conductivity are collected and processed. The received data is sent to the server, which is accessed from any device with Internet access. The approbation of the remote monitoring system at the petrochemical enterprise made it possible to ensure an uninterrupted supply of reagents and reduce the corrosion rate by 5 times.

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9

Demyanovsky, V. B., D. A. Kaushansky, and N. R. Bakirov. "Study of the degradation of the gels of polymer-gel system based on Temposcreen-Plus reagent." Actual Problems of Oil and Gas, no. 29 (November 19, 2020): 72–81. http://dx.doi.org/10.29222/ipng.2078-5712.2020-29.art6.

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There are a huge number of types of well operations that involve pumping various reagents into the reservoir through the well. In this case, there may be a need for destruction and removal of the reagents used, associated with non-standard or technological problems, for example, undesirable deterioration of the filtration properties of the reservoir in the bottom-hole zone, blocking the well or bottom of the well. In this case, breakers are used – reagents that destroy or change the physical and chemical properties of certain chemical products, after which they can be easily removed from the w

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10

Rauwerdink, Alissa, Michael Benson, Allison Jayne, Sathyapriya Babu, Jessica St Charles, and Amy Smith. "Adventures in critical reagent lot changes in ligand-binding assays: redevelopment, bridging and additional processing requirements." Bioanalysis 13, no. 10 (2021): 771–77. http://dx.doi.org/10.4155/bio-2020-0216.

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Aim: Critical reagents have significant impact on ligand-binding assay performance. The critical reagents selected during method development should be well-evaluated, as the quality of these reagents will dictate performance of the assay over time. Critical reagents in ligand-binding assays are almost always produced using a biological system, so batch yield, purity and performance tend to vary greatly. Due to the essential nature of critical reagents in the assay, changes in critical reagents can have dramatic impact on the assay and results, so close monitoring of assay performance is requir

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11

Kumar, R. K. "Immunogold-silver cytochemistry using a capillary action staining system." Journal of Histochemistry & Cytochemistry 37, no. 6 (1989): 913–17. http://dx.doi.org/10.1177/37.6.2470811.

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An improved method for immunogold-silver staining is described. Rat monoclonal antibodies to T-lymphocyte surface membrane antigens were employed to demonstrate T-cells and their subsets in frozen sections of mouse spleen and in smears of peripheral blood mononuclear cells. A capillary action staining system was used to perform all stages of the procedure, substantially reducing the technical effort involved, saving reagents, and improving reproducibility and control of batch staining. The use of a light-stable silver enhancement reagent simplified the development of the reaction product. Tech

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Lubis, Arif Ridho, Hafid Rahman Harefa, Al-Khowarizmi Al-Khowarizmi, Julham Julham, Muharman Lubis, and Romi Fadillah Rahmat. "Human blood group type detection prototype focusing on agglutinin using microcontroller based photodiode." Bulletin of Electrical Engineering and Informatics 13, no. 4 (2024): 2310–19. http://dx.doi.org/10.11591/eei.v13i4.7007.

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Blood is a fluid in the body that mainly serves as a medium for transporting various substances in the body. Detection of human blood group types with this microcontroller utilizes dark and light properties. The dark character appears due to agglomeration, while the light nature arises because of no agglomeration, for this to happen, a liquid reagent is needed. Administration of this liquid uses the aviator's breathing oxygen (ABO) system, which consists of reagent a, reagent b, and reagent c and mixing it with blood on the test paper. The number of blood samples in each reagent is based on bl

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13

Hayden, R. T., Z. Gu, S. S. Sam, et al. "Comparative Performance of Reagents and Platforms for Quantitation of Cytomegalovirus DNA by Digital PCR." Journal of Clinical Microbiology 54, no. 10 (2016): 2602–8. http://dx.doi.org/10.1128/jcm.01474-16.

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A potential benefit of digital PCR is a reduction in result variability across assays and platforms. Three sets of PCR reagents were tested on two digital PCR systems (Bio-Rad and RainDance), using three different sets of PCR reagents for quantitation of cytomegalovirus (CMV). Both commercial quantitative viral standards and 16 patient samples (n= 16) were tested. Quantitative accuracy (compared to nominal values) and variability were determined based on viral standard testing results. Quantitative correlation and variability were assessed with pairwise comparisons across all reagent-platform

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14

Grossi, Marco, Enrico Valli, Alessandra Bendini, Tullia Gallina Toschi, and Bruno Riccò. "A Portable Battery-Operated Sensor System for Simple and Rapid Assessment of Virgin Olive Oil Quality Grade." Chemosensors 10, no. 3 (2022): 102. http://dx.doi.org/10.3390/chemosensors10030102.

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Virgin olive oil quality is assessed by chemical as well as sensory analysis. Two of the most important parameters that define the quality of virgin olive oils are the free acidity and the peroxide index. These chemical parameters are usually determined by manual titration procedures that must be carried out in a laboratory by trained personnel. In this paper, a portable sensor system to support the quality grade assessment of virgin olive oil is presented. The system is battery operated and characterized by small dimensions, light weight and quick measurement response (about 30 s). The workin

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15

Kremenetskaya, Irina P., Svetlana I. Mazukhina, Svetlana V. Drogobuzhskaya, and Tatiana K. Ivanova. "Physical and chemical modeling of the ZnSO4-CaO(MgO)-SIO2-H2O system." Transactions of the Kоla Science Centre. Series: Natural Sciences and Humanities 1, no. 2/2022 (2022): 93–99. http://dx.doi.org/10.37614/2949-1185.2022.1.2.011.

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The paper presents the results of zinc precipitation from sulfate solutions with alkaline reagents (serpentinite magnesite and calcium oxide). X-ray diffraction, micromorphological analysis, and thermodynamic modeling revealed the formation of stable metastable silicate zinc-containing phase in the experiment with the use metaserpentine as a reagent. When calcium oxide is used as a reactant, zincite precipitated.

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Racicot, Joan M., Teresa L. Mako, Alexander Olivelli, and Mindy Levine. "A Paper-Based Device for Ultrasensitive, Colorimetric Phosphate Detection in Seawater." Sensors 20, no. 10 (2020): 2766. http://dx.doi.org/10.3390/s20102766.

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High concentrations of certain nutrients, including phosphate, are known to lead to undesired algal growth and low dissolved oxygen levels, creating deadly conditions for organisms in marine ecosystems. The rapid and robust detection of these nutrients using a colorimetric, paper-based system that can be applied on-site is of high interest to individuals monitoring marine environments and others affected by marine ecosystem health. Several techniques for detecting phosphate have been reported previously, yet these techniques often suffer from high detection limits, reagent instability, and the

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17

Morais, Inês P. A., M. Renata S. Souto, and António O. S. S. Rangel. "A Double-Line Sequential Injection System for the Spectrophotometric Determination of Copper, Iron, Manganese, and Zinc in Waters." Journal of AOAC INTERNATIONAL 88, no. 2 (2005): 639–44. http://dx.doi.org/10.1093/jaoac/88.2.639.

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Abstract A double-line sequential injection system was developed for the spectrophotometric determination of several metal ions in waters. The proposed double-line configuration was used to enable adding sample and chromogenic reagents as merging zones. The methodology was applied to the spectrophotometric determination of copper, iron, manganese, and zinc in samples of diverse origins at the range of 0.15–5.00, 0.10–10.0, 0.48–4.00, and 0.11–5.00 mg/L, respectively. Different chromogenic reagents and detection wavelengths were used. The chromogenic reagents for iron and manganese were 1,10-ph

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18

Tatyana, Artyukh, Kupalova Galyna, Bazylevych Viktor, Hryhorenko Inna, and Ternova Alla. "IMPROVING A PROCEDURE FOR DETERMINING THE ASSAY OF GOLD IN A PRECIOUS ALLOY OF DIFFERENT COMPOSITION USING A TOUCHSTONE." Eastern-European Journal of Enterprise Technologies 2, no. 12 (98) (2019): 6–19. https://doi.org/10.15587/1729-4061.2019.165408.

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We report testing the yellow and white jewelry alloys based on gold that contains nickel, zinc, palladium, using a touchstone by applying various chemical reagents and XFA (X-ray fluorescence analysis). We have improved the procedure for assessing the conformity of assay of the precious alloys based on gold, considering the content of component composition by using the results from rubbing the alloys on a touchstone. It was established that the magnitude of gold assay for precious alloys in the system AuAgZnCu, determined under the action of the reagent "chloric gold" on the touchsto

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19

Donohue, J., M. Bailey, R. Gray, et al. "Enzyme immunoassay system for panel testing." Clinical Chemistry 35, no. 9 (1989): 1874–77. http://dx.doi.org/10.1093/clinchem/35.9.1874.

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Abstract An immunoassay system based on enzyme immunoassay technology has been developed for quantitative panel testing. The system includes test card disposables, reagents, and an instrument. Patients' samples are processed semiautomatically in the instrument with minimum user intervention. The test card has multiple test areas at individual locations on a membrane solid phase so that simultaneous determinations from a single specimen are possible. Each panel also includes positive and negative reagent procedural controls. Factory-determined calibration curves for each analyte are provided in

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20

Burkhanova, Renata, Natalya Evstafyeva, Talgat Akchurin, and Igor Stefanenko. "Estimation of the Filled Two-Component Cold Curing Polymer System Performance as a Coating for Protecting Concrete Surfaces from the Aggressive Environment Exposure." Materials Science Forum 1043 (August 18, 2021): 73–80. http://dx.doi.org/10.4028/www.scientific.net/msf.1043.73.

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A filled two-component polymer cold curingsystem (FTCPS) is discussed in the article. To assess its corrosion resistance and durability, the indexes of reagent resistance were determined in accordance with the sorption method. What is optimal, since this value depends on the parameters of mass transfer, the intensity of the reaction, the size of the product, the duration of exposure to aggressive media and other factors. As aggressive media were taken: water, 5% hydrochloric acid solution, 25% aqueous ammonia solution, 10% sodium hydroxide solution, saturated sodium chloride solution. The expo

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21

Sviridov, A. V., V. V. Iurchenko, I. K. Gindulin, and M. S. Roschina. "The use of high-fine modified aluminosilicate adsorbents in the processes of purification of household waste water." Proceedings of the Voronezh State University of Engineering Technologies 83, no. 4 (2022): 274–79. http://dx.doi.org/10.20914/2310-1202-2021-4-274-279.

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The article deals with the problem of treatment and purification of domestic waste water. Today, many treatment facilities do not have a reagent treatment system and are limited only by mechanical and biological methods of water treatment. We have considered the possibility of using a new scheme for reagent treatment of domestic wastewater. The existing reagent treatment at treatment facilities does not always cope with the tasks of water treatment. It is not possible to achieve the required values for many indicators: COD, residual phosphate content, residual iron content, etc. The water unde

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22

Shamyan, Varuzhan, Armenuhi Minasyan, and Marine Kalantaryan. "Calculation Features of Vertical Settling Tanks for Heavy Metal - Containing Wastewater Treatment." Journal of Architectural and Engineering Research 7 (December 25, 2024): 31–39. https://doi.org/10.54338/27382656-2024.7-03.

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The article discusses the treatment of wastewater containing heavy metal salts before releasing it into natural water bodies or the urban drainage system. The focus is on environmental protection, human health, and the potential for recovering valuable metals from wastewater. A vertical settling tank was selected for its cost-effectiveness in treating metal-containing acidic wastewater. The article provides a general method for calculating these settling tanks during reagent sedimentation, which can be used to remove various types of heavy metal salts. For this purpose, all calculations relate

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23

Navrátil, Oldřich, Eckhard Herrmann, Gisbert Grossmann, and Jiří Teplý. "Extraction of scandium with tetraphenyl imidodiphosphate and its sulfur analogues, and the radiation stability of the reagent." Collection of Czechoslovak Chemical Communications 55, no. 2 (1990): 364–71. http://dx.doi.org/10.1135/cccc19900364.

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Solvent extraction of scandium from perchloric or hydrochloric acid aqueous systems into benzene solutions of tetraphenyl imidodiphosphate, (PhO)2P(O)NHP(O)(PhO)2 (HA), and its sulfur analogues containing the P(O)NHP(S) or P(S)NHP(S) groups was studied. Behaving as weak acids in the aqueous phase, the reagents form complex extractable compounds ScA3 with scandium. The extraction constants were measured and found lower for the sulfur analogues than for the oxygen reagent. The configuration changes induced in the reagent by gamma irradiation from a 60Co source were studied by examining the extra

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Kim, Changsu, Hongyoul Kim, and Hoekyung Jung. "Sensor data identification based reagent cabinet management system." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 6 (2019): 5304. http://dx.doi.org/10.11591/ijece.v9i6.pp5304-5311.

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Recently, a reagent cabinet is used in a laboratory or a laboratory is required to have a system capable of identifying a dangerous situation through sensor data as various sensors are utilized. The existing system identifies the dangerous situation through various sensor data, but there is a problem that the server performs all the operations and the operation of the device is performed manually. In order to solve this problem, this paper proposes a system that can identify the dangerous situation and automatically operate the equipment through the internal environment data of the reagent cab

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Changsu, Kim, Kim Hongyoul, and Jung Hoekyung. "Sensor data identification based reagent cabinet management system." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 6 (2019): 5295–303. https://doi.org/10.11591/ijece.v9i6.pp5295-5303.

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Recently, a reagent cabinet is used in a laboratory or a laboratory is required to have a system capable of identifying a dangerous situation through sensor data as various sensors are utilized. The existing system identifies the dangerous situation through various sensor data, but there is a problem that the server performs all the operations and the operation of the device is performed manually. In order to solve this problem, this paper proposes a system that can identify the dangerous situation and automatically operate the equipment through the internal environment data of the reagent cab

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Colbert, D. L., G. J. Turner, and J. C. Gooch. "Reducing the Cost of Phenytoin Assays with in-House TDx™ Reagents." Annals of Clinical Biochemistry: International Journal of Laboratory Medicine 30, no. 6 (1993): 555–58. http://dx.doi.org/10.1177/000456329303000605.

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The Abbott TDx™ is frequently used for therapeutic drug monitoring of phenytoin concentrations, but reagent costs are high. In an attempt to reduce these costs, we investigated the preparation of in-house reagents. A commercial antiserum was available at reasonable cost and the fluorescent tracer was easily prepared. We describe the preparation of these reagents and their application to the TDx™ system. Substantially reduced costs were obtained using the in-house reagents.

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27

Al-Asady, Ihsan A., and K. H. Al-Sowdani. "Lab build Fully Automated microfluduic flow injection System." Journal of Physics: Conference Series 2063, no. 1 (2021): 012018. http://dx.doi.org/10.1088/1742-6596/2063/1/012018.

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Abstract A fully automated microfluidic Flow Injection spectrophotometric system was designed in our laboratory with methylene blue used as an example. The device consists of a double-line microfluidic chip with dimensions (30 μl x 4 cm), each 15 μl volume intended to allow a very small volume of reagent and sample to be used. The microfluidic system also consists of two types of Arduino software. The first was the UNO of a type used to control the two mini peristaltic pumps to drive the water and methylene blue as carrier stream and sample respectively. The Mega type, which was equipped with

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Poggio, Marina, Antonius M. H. P. van den Besselaar, Edo A. van der Velde, and Rogier M. Bertina. "The Effect of Some Instruments for Prothrombin Time Testing on the International Sensitivity Index (ISI) of Two Rabbit Tissue Thromboplastin Reagents." Thrombosis and Haemostasis 62, no. 03 (1989): 868–74. http://dx.doi.org/10.1055/s-0038-1651019.

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SummaryTwo commercial rabbit tissue thromboplastins were calibrated against the International Reference Preparation for rabbit thromboplastin (coded RBT/79) by one laboratory using the manual technique, a semi-automatic electro-mechanical coagulometer and three different automatic photo-optical instruments. The calibration of the two reagents was performed in three and two different exercises, respectively, and showed good reproducibility of the procedure. The purpose of calibration is providing a formula for the assessment of the International Normalized Ratio (INR) for patients receiving ora

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Kysliakov, V. H., I. O. Manachyn, V. I. Yelisieiev, and O. L. Rudenko. "Study of gas-powder jets injection by cold modeling methods." Fundamental and applied problems of ferrous metallurgy, no. 38 (2024): 186–98. https://doi.org/10.52150/2522-9117-2024-38-186-198.

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The aim of the work is to study the processes of injecting gas-powder jets into a liquid bath on cold models and determine the processing parameters. To implement the cold modeling, an installation was mounted at the laboratory base of the Institute of Ferrous Metallurgy, which provides a controlled reagent injection. The reagents used were soda, lime, and iron (II) oxide. The simulation was carried out with the reagent being dispensed into a dry container and into a container with water, which was an imitation of a ladle. Before pouring the reagent into the dosing device, sieving was performe

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Renoe, B. W., G. L. Combs, E. E. Coffee, and R. F. DeGrella. "Critical evaluation of the TDx Turbo Nephelometry System." Clinical Chemistry 34, no. 12 (1988): 2524–27. http://dx.doi.org/10.1093/clinchem/34.12.2524.

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Abstract We critically evaluated the Nephelometry System (TDx Turbo) for the TDx Analyzer (Turbo), as currently used for immunoglobulins (IgA, IgG, and IgM) and transferrin assays. We describe hardware, software, reagent, and procedural changes made since the original publication (Clin Chem 1985;31:1474) and the mathematical treatment of data. The unit-dose format of the reagents allows for batch or panel testing of the analytes, with a throughput of 40 tests per hour. Measurements are made at pseudo-equilibrium, with sample-blank correction. The formulation of reagents and the assay scheme ar

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Poller, L., and E. A. Van der Velde. "The APTT Monitoring of Heparin - The ISTH/ICSH Collaborative Study." Thrombosis and Haemostasis 73, no. 01 (1995): 073–81. http://dx.doi.org/10.1055/s-0038-1653728.

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SummaryIn an international collaborative study three candidate reference and the local APTT reagent have been tested with lyophilized plasmas containing heparin added in vitro and fresh plasmas from heparinized patients to determine whether it was possible to standardize APTT heparin monitoring.The APTT responses of patients with thrombosis were much less to the same concentrations of heparin so only these plasmas were used to calibrate the reagents.A calibration constant (b) was determined for each local APTT system from the orthogonal regression slope of the patients’ and normals’ plasmas. A

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Gurbanov, Abdulaga, Ijabika Sardarova, Javida Damirova, and Zarifa Mahmudova. "Development of a new technology for the fight against wax deposits." EUREKA: Physics and Engineering, no. 4 (July 27, 2023): 3–9. http://dx.doi.org/10.21303/2461-4262.2023.003023.

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One of the most serious complications in the production, transport and treatment of oil is asphaltene-resin-paraffin deposits. Their formation in underground well equipment, as well as in flow lines, collection system pipelines increase the cost of oil production. There are no sufficiently effective reagents to solve these problems. The results of implementation in many other wells testify to the high efficiency of the new reagent. The effect of reagents on the rheological properties of oil was also studied. Sangachal Deniz oil was used as a crude oil sample. We have developed multicomponent a

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Smirnova, V. S., S. A. Hudorozhkova, and O. I. Ruchkinova. "SUBSTANTIATION OF OPTIMAL CONDITIONS FOR THE REAGENT PURIFICATION OF WASH WATER FROM HEAVY NON-FERROUS METAL IONS." Construction and Geotechnics 10, no. 2 (2019): 106–18. http://dx.doi.org/10.15593/2224-9826/2019.2.09.

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The article is devoted to the analysis of reagent methods, selection of reagents and optimal doses for the process of carrying out the purification of industrial wastewater from heavy non-ferrous metal ions, such as copper ammonium, copper sulfate, nickel, hexavalent chromium. Presents data on the cost of each reagent used, as well as a table with the original data. The course of the experimental work, the pH value, the initial metal concentration and the dose of the reagents used are described. The graphic results of experimental work on the purification of wash water containing various non-f

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Zhang, Fu Cheng, Bo Han, Bo Lv, and Tian Sheng Wang. "Colored Metallography Study of Bainite Steel Used for High Speed Railway Crossing." Materials Science Forum 654-656 (June 2010): 142–45. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.142.

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Using the technique of colored metallography, the phase compositions of two medium-/low-carbon low-alloy carbide-free bainite steel used for railway crossings are obtained. The etching of the samples was carried out using the Lepera reagent and a mixed reagent of hyposulphite and picric acid respectively. The proportion of the bainite phase was calculated using an image processing system with an optical microscope and the residual austenite content was measured using XRD method. The martensite phase content can then be determined. It is found that the reagents can effectively and quantifiably

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Poller, L. "A Simple Nomogram for the Derivation of International Normalised Ratios for the Standardisation of Prothrombin Times." Thrombosis and Haemostasis 60, no. 01 (1988): 018–20. http://dx.doi.org/10.1055/s-0038-1647626.

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SummaryThe WHO international scale of reporting prothrombin time results is based on the calibration of local and commercial thromboplastin reagents used in the test against an international reference preparation to derive an International Sensitivity Index (ISI) for each batch of local reagent. This quantifies an individual reagent’s responsiveness to the coumarin induced defect.Once the ISI has been assigned, the derivation of International Normalised Ratios (INR) for reporting results depends on the use of a scientific calculator by which the local ratio is raised to the power of the ISI of

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Mischke, Reinhard. "Activated Partial Thromboplastin Time as a Screening Test of Minor or Moderate Coagulation Factor Deficiencies for Canine Plasma: Sensitivity of Different Commercial Reagents." Journal of Veterinary Diagnostic Investigation 12, no. 5 (2000): 433–37. http://dx.doi.org/10.1177/104063870001200507.

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To determine the sensitivity for detection of coagulation factor deficiencies by commercial reagents for canine plasma, 5 commercial activated partial thromboplastin time (APTT) reagents with different types of contact activator and phospholipid of various origin were examined. Thirty canine plasma samples with minor or moderate deficiencies of coagualition factors that influence the APTT were examined. Significant differences were found for the sensitivity of various reagents, but no correlation was found with the type of contact activator. Following the test instructions provided by the manu

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37

Kay, G., J. R. Bailie, I. M. Halliday, J. Nelson, and B. Walker. "The synthesis, kinetic characterization and application of biotinylated aminoacylchloromethanes for the detection of chymotrypsin and trypsin-like serine proteinases." Biochemical Journal 283, no. 2 (1992): 455–59. http://dx.doi.org/10.1042/bj2830455.

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The synthesis of two biotinylated affinity labels for chymotrypsin and trypsin-like serine proteinases is described, along with their kinetic characterization and application to the detection of these proteinases after PAGE and Western blotting. Thus the chloromethane analogues biotinylphenylalanylchloromethane (Bio-Phe-CH2Cl; reagent 1) and biotinylarginylchloromethane (Bio-Arg-CH2Cl, reagent 2), have been shown to be potent active-site-directed inactivators of chymotrypsin and trypsin respectively. The apparent overall second-order rate constants (kobs./[I]) for the inactivation of chymotryp

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Rocha, Fábio R. P., and Elias A. G. Zagatto. "Chemical Derivatization in Flow Analysis." Molecules 27, no. 5 (2022): 1563. http://dx.doi.org/10.3390/molecules27051563.

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Chemical derivatization for improving selectivity and/or sensitivity is a common practice in analytical chemistry. It is particularly attractive in flow analysis in view of its highly reproducible reagent addition(s) and controlled timing. Then, measurements without attaining the steady state, kinetic discrimination, exploitation of unstable reagents and/or products, as well as strategies compliant with Green Analytical Chemistry, have been efficiently exploited. Flow-based chemical derivatization has been accomplished by different approaches, most involving flow and manifold programming. Soli

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Zhang, Hang Wei, and Jian Feng Huang. "Development of Retrieve/Storage Cabinets for Chemical Reagents." Applied Mechanics and Materials 577 (July 2014): 457–60. http://dx.doi.org/10.4028/www.scientific.net/amm.577.457.

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To integrate chemical reagent retrieve/storage (R/S) device with management information system, an intelligent mechatronic system is developed. Three kinds of unit cabinets for reagent bottles are constructed. A Single-chip Microcomputer and a Personal Computer are served as a slave and host control system respectively. A set of special application software is programmed by VC++ and Access to accomplish reagent retrieve/storage, usage reports and surplus warning by short massage based on the Internet of Things. The integration of chemical reagent R/S device with MIS is realized which could mak

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SAFIULLIN, K. R., E. D. LI, R. S. DAVLETBAEV, O. O. SAZONOV, and I. M. DAVLETBAEVA. "INVESTIGATION OF ANALYTICAL TEST SYSTEMS OBTAINED USING MICROPOROUS BLOCK COPOLYMERS." Herald of Technological University 27, no. 11 (2024): 63–68. https://doi.org/10.55421/1998-7072_2024_27_11_63.

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Sensor membrane materials play a key role in determining metal ions in their aqueous solutions. The performance of ion exchange membranes, particularly their speed and effectiveness, is directly linked to their internal structure and physical form. Block copolymers, frequently considered promising materials for sensor membranes, exhibit a remarkable characteristic known as microphase separation. This phenomenon, occurring both in solid and dissolved states, plays a crucial role in influencing the membrane's ion exchange capabilities. The desire for separation and self-organization leads to the

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Sung, E., and W. E. Neeley. "A cost-effective system for performing therapeutic drug assays. I. Optimization of the theophylline assay." Clinical Chemistry 31, no. 7 (1985): 1210–15. http://dx.doi.org/10.1093/clinchem/31.7.1210.

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Abstract We have developed a cost-effective system for performing drug assays by using the COBAS BIO centrifugal analyzer and EMIT reagents. With the theophylline assay as a model, we were able to optimize both instrument and chemical parameters to allow assay of 2470 samples with a 100-test EMIT kit. This decreased current reagent costs from +2.00 per test for the Syva manual method to 9 cents per test for our proposed method. Within-run and between-run CVs are typically less than 3% and 6%, respectively.

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Pavlov, Michael, Danni Lin, and Eugene Shalyt. "Efficient Non-reagent Metrology for Modern TSV Baths." International Symposium on Microelectronics 2014, no. 1 (2014): 000189–93. http://dx.doi.org/10.4071/isom-tp14.

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Through-silicon via (TSV) technology is gaining popularity in 3D packaging and 3D integrated circuits. TSV baths are formulated with highly stable electrolytes that contain copper and sulfuric acid. Other components introduced into the bath in relatively small amounts are organic additives and chloride ions. This article will focus on a non-reagent metrology to efficiently monitor these components. The chloride concentration is determined from the chloride oxidation current using specific voltammetric parameters. Similar to analysis of suppressor, the measurement is made directly in the undilu

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Yan, Dandan, Rue Li, and Le Gao. "Research progress of limulus coagulation mechanism and limulus reagents." BIO Web of Conferences 111 (2024): 01016. http://dx.doi.org/10.1051/bioconf/202411101016.

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The coagulation system of Limulus is mainly composed of coagulation proteins such as factor G, factor C, factor B, and prothrombin. The traditional horseshoe crab reagent for endotoxin detection is not specific, and its colorimetric reaction is activated through two pathways: one is activated by endotoxin to activate factor C, and the other is activated by (1,3)- β-D-glucan activates factor G. The horseshoe crab reagent is composed of a series of serine proteases and is a biological reagent made by treating horseshoe crab blood cell lysate. The detection principle is that the Limulus amebocyte

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Fujita, T., S. Takata, and Y. Sunahara. "Enzymatic rate assay of creatinine in serum and urine." Clinical Chemistry 39, no. 10 (1993): 2130–36. http://dx.doi.org/10.1093/clinchem/39.10.2130.

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Abstract A two-step method for assaying creatinine in serum and urine samples, suitable with automated analyzers, is reported. Reagent 1, for the first step, contains a blanking system [creatine amidinohydrolase (CRTase), urease, glutamate dehydrogenase, NADPH, and 2-oxoglutarate] and a NADPH-regenerating system [Mg(2+)-dependent isocitrate dehydrogenase (ICD), MgCl2, and excess isocitrate]. Reagent 2, for the second step, contains the metal-chelating reagent trans-1,2-cyclohexanediamine-N,N,N',N'-tetraacetic acid (CyDTA) and a trigger system [creatinine amidohydrolase (CRNase)]. When a specim

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Hamama, Wafaa S., Osama M. Abd El-Magid, and Hanafi H. Zoorob. "Synthetic Entry to Tricyclic and Tetracyclic Quinuclidine Derivatives by Cycloaddition and Ring Transformation." Zeitschrift für Naturforschung B 61, no. 1 (2006): 93–100. http://dx.doi.org/10.1515/znb-2006-0119.

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The (Z)-2-arylidene-quinuclidines 5 - 8 were synthesized. Their reaction with aliphatic dibasic functional reagents in both basic and acidic conditions afforded the fused heterocycles 9, 10 and 11. However, the reaction of arylidene derivative 5 with an aromatic dibasic functional reagent gave benzimidazole 13 in lieu of the anticipated tetracyclic system, quinuclidino[3,2-e]benzo[b]-1,4-diazepine 12. Cycloadditions of 5 with different reagents gave the heterocyclic derivatives 17, 19, 22 and 23. Acid-catalyzed cyclization of 5 with excess resorcinol gave 24. Compounds 9a, 19 and 24 showed ant

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Olhovsky, Marina, Kelly Williton, Anna Yue Dai, et al. "OpenFreezer: a reagent information management software system." Nature Methods 8, no. 8 (2011): 612–13. http://dx.doi.org/10.1038/nmeth.1658.

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Gryaznov, V. M. "Dynamics of the heterogeneous catalyst-reagent system." Reaction Kinetics and Catalysis Letters 35, no. 1-2 (1987): 89–94. http://dx.doi.org/10.1007/bf02062146.

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Volchyn, I., S. Kryvosheiev, A. Yasynetskyi, A. Zaitsev, and O. Samchenko. "Selective non-catalytic reduction of nitrogen oxides in the production of iron ore pellets." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 1 (February 28, 2022): 88–94. http://dx.doi.org/10.33271/nvngu/2022-1/088.

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Purpose. Using mathematical modeling, to assess the feasibility of introducing a Selective Non-Catalytic Reduction (SNCR) system as a measure to reduce nitrogen oxide emissions from the production of iron ore pellets. To determine the peculiarities of using ammonia solution and urea solution as reagents for the SNCR process, the influence of the injection of these reagents on the temperature regime during iron pellet production, as well as assess the expected efficiency of the SNCR method for purification of exhaust gases from nitrogen oxides. Methodology. The research results have been obtain

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Barnes, Chris, Vera Ignjatovic, Janine Furmedge, et al. "Developmental haemostasis." Thrombosis and Haemostasis 95, no. 02 (2006): 362–72. http://dx.doi.org/10.1160/th05-01-0047.

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SummaryDevelopmental haemostasis is a concept, now universally accepted, introduced by Andrew et al. in the late 1980’s. However, coagulation analysers and reagents have changed significantly over the past 15 years. Coagulation testing is known to be sensitive to changes in individual reagents and analysers. We hypothesised that the reference ranges developed by Andrew et al. may not be appropriate for use in a modern coagulation laboratory. Our study was designed to determine whethera current day coagulation testing system (STA Compact analyser and Diagnostica Stago reagent system) was sensit

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Alkhafaji, Mohammed Nawfal Abdul Maged, Hutham Abd Ali Abd Al Hussain, and Dr Nagham Mahmood Aljamali. "Synthesis, Spectral, Bio Assay, Chromatographic - Studying of New Imidazole Reagents Via Three Components Reaction." NeuroQuantology 19, no. 7 (2021): 115–22. http://dx.doi.org/10.14704/nq.2021.19.7.nq21092.

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Imidazoles are part of the theophylline Reagent, found in tea leaves and coffee beans, which stimulates the central nervous system. It is found in the anti-cancer drug mercaptopurine, which fights leukemia by interfering with DNA systems. A number of prepared imidazoles, including clotrimazole, are selective inhibitors of nitric oxide synthase, which makes them interesting drug targets in inflammation, respiratory diseases and tumors of the nervous system. Other biological activities of the drug carrier imidazole relate to deregulation of the intracellular fluxes of (Ca and K) ions. Novel imid

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