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Journal articles on the topic 'Active mixtures'

Author: Grafiati

Published: 28 September 2024

Last updated: 31 July 2025

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1

Gaido, Kevin, Li You, and S. Safe. "Modification of endocrine active potential by mixtures." Pure and Applied Chemistry 75, no. 11-12 (2003): 2069–79. http://dx.doi.org/10.1351/pac200375112069.

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Wildlife and humans are exposed to a complex mixture of endocrine active chemicals. The activity of a specific chemical in any mixture can be modified through interactions with other components of the mixture. The toxic equivalency factor (TEF) approach for risk assessment was developed for chemicals such as halogenated aromatics that induce their effects through ligand-activated receptors. For persistent halogenated aromatic AhR agonists, this approach has some utility. However, the use of the TEF approach for endocrine active compounds is confounded by the unique tissue- and response-specifi

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Carenza, Livio Nicola, Giuseppe Gonnella, Antonio Lamura, and Giuseppe Negro. "Dynamically asymmetric and bicontinuous morphologies in active emulsions." International Journal of Modern Physics C 30, no. 10 (2019): 1941002. http://dx.doi.org/10.1142/s012918311941002x.

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The morphology of a mixture made of a polar active gel immersed in an isotropic passive fluid is studied numerically. Lattice Boltzmann method is adopted to solve the Navier–Stokes equation and coupled to a finite-difference scheme used to integrate the dynamic equations of the concentration and of the polarization of the active component. By varying the relative amounts of the mixture phases, different structures can be observed. In the contractile case, at moderate values of activity, elongated structures are formed when the active component is less abundant, while a dynamic emulsion of pass

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KIDALOV, N. A. "DETERMINATION OF ACTIVE CLAY IN THE COMPOSITION OF THE MOLDING MIXTURE." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 7(278) (July 2023): 42–47. http://dx.doi.org/10.35211/1990-5297-2023-7-278-42-47.

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This article is devoted to determining the content of active clay in molding mixtures depending on their composition. It is shown that the processing of the clay affects the amount of active bentonite in the mixture.

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Stoeckli, F., G. Couderc, A. Lavanchy, D. Wintgens, and P. Girardin. "The Non-Ideality of the System Benzene + 1,2-Dichloroethane Adsorbed in Microporous Carbons at 293 K." Adsorption Science & Technology 18, no. 6 (2000): 581–89. http://dx.doi.org/10.1260/0263617001493648.

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In the case of simple vapour mixtures adsorbed by active carbons, the activity coefficients seem to depend essentially on the composition of the adsorbed phase, rather than on the degree of micropore filling. Consequently, the liquid–solid adsorption equilibrium of benzene + 1,2-dichloroethane mixtures has been investigated at 293 K, using a typical active carbon and following earlier work for adsorption from the vapour phase. This system has the advantage that the mixture is ideal in the liquid state, which provides a convenient reference for the study of the adsorbed phase. The activity coef

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Chaiya, Pornsit, and Thawatchai Phaechamud. "Compatibility between Magnesium Stearate and Pharmaceutical Acidic Active Compounds/Excipients with DSC." Key Engineering Materials 856 (August 2020): 190–97. http://dx.doi.org/10.4028/www.scientific.net/kem.856.190.

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Compatibility investigation was performed between magnesium stearate and acidic drug compounds (ibuprofen, indomethacin and valproic acid) and acidic pharmaceutical excipients (lactic acid and citric acid) using differential scanning calorimetry (DSC). DSC study indicated the possible incompatibility for the mixture between magnesium stearate and any compounds. Alteration in DSC thermogram was found in all mixtures. The eutectic phenomenon was found in the powder mixture of magnesium stearate and ibuprofen. In addition, the presence of melting endothermic peak of stearic acid in other powder m

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Fields, Paul G., Sheila Woods, and Wesley G. Taylor. "Triterpenoid saponins synergize insecticidal pea peptides: effect on feeding and survival of Sitophilus oryzae (Coleoptera: Curculionidae)." Canadian Entomologist 142, no. 5 (2010): 501–12. http://dx.doi.org/10.4039/n10-024.

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AbstractThe triterpenoid saponins soyasaponin I, dehydrosoyasaponin I, echinocystic acid 3-glucoside, β-escin, glycyrrhizic acid, hederacoside C, and α-hederin were tested alone and in combination with insecticidal PA1b peptide mixtures isolated from peas for their effects on the feeding and survival of a stored-product insect, the rice weevil, Sitophilus oryzae (L.). There were two sources of peptides: a purified extract composed primarily of PA1b peptides and a partially purified extract (C8 extract) that contained mainly peptides and lesser amounts of soyasaponin I, dehydrosoyasaponin I, an

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Farouk Mansour, A., F. Pudil, V. Janda, and J. Pokorný. "Changes during the extrusion of semolina in mixture with sugars." Czech Journal of Food Sciences 19, No. 1 (2013): 24–30. http://dx.doi.org/10.17221/6570-cjfs.

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Wheat semolina and its mixtures with 5% glucose, fructose of sucrose were processed in a sigle screw extruder at the maximum temperature of 140&deg;C and the processing time of 30 s. The nonenzymic browning was only moderate, but it was substantially more intensive in mixtures with glucose or fructose than in the case of wheat semolina or its mixture with sucrose. Red and yellow pigments were mainly formed. The odour acceptability was affected by the presence of sugars almost negligibly, but the intensities were different, higher in extruded mixtures with glucose and fructose than in wheat

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Ballu, Agathe, Anne Deredec, Anne-Sophie Walker, and Florence Carpentier. "Are Efficient-Dose Mixtures a Solution to Reduce Fungicide Load and Delay Evolution of Resistance? An Experimental Evolutionary Approach." Microorganisms 9, no. 11 (2021): 2324. http://dx.doi.org/10.3390/microorganisms9112324.

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Pesticide resistance poses a critical threat to agriculture, human health and biodiversity. Mixtures of fungicides are recommended and widely used in resistance management strategies. However, the components of the efficiency of such mixtures remain unclear. We performed an experimental evolutionary study on the fungal pathogen Z. tritici to determine how mixtures managed resistance. We compared the effect of the continuous use of single active ingredients to that of mixtures, at the minimal dose providing full control of the disease, which we refer to as the “efficient” dose. We found that th

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de Castro, Pablo, Francisco M. Rocha, Saulo Diles, Rodrigo Soto, and Peter Sollich. "Diversity of self-propulsion speeds reduces motility-induced clustering in confined active matter." Soft Matter 17, no. 43 (2021): 9926–36. http://dx.doi.org/10.1039/d1sm01009c.

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Mixtures of active particles with more diverse swim speeds form smaller persistence-induced clusters. Their average cluster size is equal to that of one-component systems whose swim speed is the harmonic mean of the swim speeds of the mixture.

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de Castro, Pablo, Francisco M. Rocha, Saulo Diles, Rodrigo Soto, and Peter Sollich. "Diversity of self-propulsion speeds reduces motility-induced clustering in confined active matter." Soft Matter 17, no. 43 (2021): 9926–36. http://dx.doi.org/10.1039/d1sm01009c.

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Mixtures of active particles with more diverse swim speeds form smaller persistence-induced clusters. Their average cluster size is equal to that of one-component systems whose swim speed is the harmonic mean of the swim speeds of the mixture.

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Binchiciu, Emilia Florina, Nicușor Alin Sîrbu, Ionelia Voiculescu, Victor Geantă, and Gabriela Victoria Mnerie. "Research on Metallurgic Active Precursors." Advanced Materials Research 1153 (May 2019): 46–51. http://dx.doi.org/10.4028/www.scientific.net/amr.1153.46.

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The paper presents the current state of researches carried out in order to improve homogeneity of mixtures for metallic powders; our priority is those with different participation in the mixture, by mechanical alloying. Mixtures of this type are used in the production of welding and related materials.Recently, research has been done to improve deposited metal properties by welding with coated electrodes, by depositing nanostructures, with uncertain results due to the low degree of homogeneity of blends involved in the electrode coating.The performance enhancement method for coated rods, develo

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DRAKON, A. V., A. V. EREMIN, M. R. KORSHUNOVA, and E. YU MIKHEYEVA. "EFFECT OF TRIFLUORIODOMETHANE ADDITIVES ON THE IGNITION OF MULTICOMPONENT COMBUSTIBLE MIXTURES BEHIND SHOCKWAVES." Gorenie i vzryv (Moskva) - Combustion and Explosion 16, no. 1 (2023): 23–29. http://dx.doi.org/10.30826/ce23160103.

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The problems of improving the safety of various industrial facilities dealing with combustible mixtures are constantly in the center of increased attention. The introduction of chemically active additives into the gas mixture is considered as one of the most effective ways to prevent ignition and explosion. One of the most promising highly effective and, at the same time, environmentally friendly additives is trifluoroiodomethane CF3I. Recently, the effect of CF3I on the ignition of acetylene and methane has been studied; however, combustible gas mixtures encountered in practice are often far

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Ritcey, Anna M., and Robert E. Prud'homme. "Crystallization in mixtures of optically active polyesters." Macromolecules 26, no. 6 (1993): 1376–79. http://dx.doi.org/10.1021/ma00058a028.

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Smrek, Jan, and Kurt Kremer. "Interfacial Properties of Active-Passive Polymer Mixtures." Entropy 20, no. 7 (2018): 520. http://dx.doi.org/10.3390/e20070520.

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Chernobabov, A. I., A. V. Turik, E. A. Tolokol’nikov, M. Yu Rodinin, and G. I. Temirchev. "Chaotic dynamics in piezoelectrically active statistical mixtures." Physics of the Solid State 51, no. 7 (2009): 1507–9. http://dx.doi.org/10.1134/s1063783409070476.

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Abdolrazzaghi, Mohammad, Nazli Kazemi, Vahid Nayyeri, and Ferran Martin. "AI-Assisted Ultra-High-Sensitivity/Resolution Active-Coupled CSRR-Based Sensor with Embedded Selectivity." Sensors 23, no. 13 (2023): 6236. http://dx.doi.org/10.3390/s23136236.

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This research explores the application of an artificial intelligence (AI)-assisted approach to enhance the selectivity of microwave sensors used for liquid mixture sensing. We utilized a planar microwave sensor comprising two coupled rectangular complementary split-ring resonators operating at 2.45 GHz to establish a highly sensitive capacitive region. The sensor’s quality factor was markedly improved from 70 to approximately 2700 through the incorporation of a regenerative amplifier to compensate for losses. A deep neural network (DNN) technique is employed to characterize mixtures of methano

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Hoskovec, Lauren, Wande Benka-Coker, Rachel Severson, Sheryl Magzamen, and Ander Wilson. "Model choice for estimating the association between exposure to chemical mixtures and health outcomes: A simulation study." PLOS ONE 16, no. 3 (2021): e0249236. http://dx.doi.org/10.1371/journal.pone.0249236.

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Challenges arise in researching health effects associated with chemical mixtures. Several methods have recently been proposed for estimating the association between health outcomes and exposure to chemical mixtures, but a formal simulation study comparing broad-ranging methods is lacking. We select five recently developed methods and evaluate their performance in estimating the exposure-response function, identifying active mixture components, and identifying interactions in a simulation study. Bayesian kernel machine regression (BKMR) and nonparametric Bayes shrinkage (NPB) were top-performin

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Pieczyńska, Ochoa-Chavez, Wilczewska, Bielicka-Giełdoń, and Siedlecka. "Insights into Mechanisms of Electrochemical Drug Degradation in Their Mixtures in the Split-Flow Reactor." Molecules 24, no. 23 (2019): 4356. http://dx.doi.org/10.3390/molecules24234356.

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The recirculating split-flow batch reactor with a cell divided into anolyte and catholyte compartments for oxidation mixture of cytostatic drugs (CD) was tested. In this study, kinetics and mechanisms of electrochemical oxidization of two mixtures: 5-FU/CP and IF/CP were investigated. The order of the CD degradation rate in single drug solutions and in mixtures was found to be 5-FU < CP < IF. In the 5-FU/CP mixture, kapp of 5-FU increased, while kapp of CP decreased comparing to the single drug solutions. No effect on the degradation rate was found in the CP/IF mixture. The presence of a

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Žižková, Nikol, Rostislav Drochytka, and Patrik Bayer. "The Properties of Polymer-Modified Mortars Using Pozzolana Active Admixtures." Advanced Materials Research 1129 (November 2015): 185–92. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.185.

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The paper focuses on the changes in properties of cement and polymer-modified cement mortars when pozzolana-active admixture are added into the mixture. Natural and artificial pozzolans based on amorphous and mineral silicon dioxide were used. In order to explain the results obtained from the experiment and to gain new insights about the microstructure of the mixtures, equipment such as SEM sampling, RDA analysis, DTA and high-pressure mercury intrusion porosimetry were used.

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Iushan, L., M. Karelina, E. Zyryanova, G. Terentieva, and L. Vicherova. "APPLICATION OF CO2 EXTRACT FROM THE MIXTURE OF SPICES WITH HIGH CONTENT OF BIOLOGICALLY ACTIVE COMPONENTS AND NATURAL FLAVORS IN THE PREPARATION OF CERTAIN TYPES OF FOOD PRODUCTS." Scientific heritage, no. 122 (October 6, 2023): 12–16. https://doi.org/10.5281/zenodo.8412780.

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The article presents the data regarding the selection as raw materials - spices with increased content of biologically active substances and natural flavors. As a result, the compositions of mixtures of spices with increased content of biologically active components and natural flavors were developed for obtaining CO<sub>2</sub>-extract, as well as the use of CO<sub>2</sub>-extracts in the preparation of certain types of products. The recipes were elaborated and samples of pate were prepared from chicken liver with the addition of CO<sub>2</sub>- extract from the mixture of spices with an incr

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Valenti, Sofia, Claudio Cazorla, Michela Romanini, Josep Tamarit, and Roberto Macovez. "Eutectic Mixture Formation and Relaxation Dynamics of Coamorphous Mixtures of Two Benzodiazepine Drugs." Pharmaceutics 15, no. 1 (2023): 196. http://dx.doi.org/10.3390/pharmaceutics15010196.

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The formation of coamorphous mixtures of pharmaceuticals is an interesting strategy to improve the solubility and bioavailability of drugs, while at the same time enhancing the kinetic stability of the resulting binary glass and allowing the simultaneous administration of two active principles. In this contribution, we describe kinetically stable amorphous binary mixtures of two commercial active pharmaceutical ingredients, diazepam and nordazepam, of which the latter, besides being administered as a drug on its own, is also the main active metabolite of the other in the human body. We report

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Alonso, D. G., J. Constantin, R. S. Oliveira Jr, et al. "Selectivity of glyphosate tank mixtures for RR soybean." Planta Daninha 29, no. 4 (2011): 929–37. http://dx.doi.org/10.1590/s0100-83582011000400024.

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An active ingredients mixture of different action mechanisms is an essential tool to prevent or manage areas with resistant weeds. However, it is important that such a mixture provides adequate selectivity to the crop. The aim of this work was to evaluate glyphosate selectivity to glyphosate-resistant (RR) soybean, and also verify if there is selectivity in mixtures with other active ingredients applied postemergence aimed at new control strategies, which might be used in RR soybean cultivation. The herbicides and respective rates (g ha-1) evaluated were: glyphosate (720, 960, 1,200, and 1,440

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Kolb, Thomas, and Daphne Klotsa. "Active binary mixtures of fast and slow hard spheres." Soft Matter 16, no. 8 (2020): 1967–78. http://dx.doi.org/10.1039/c9sm01799b.

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Monodisperse active and active/passive systems are subsets of a larger continuum of active/active mixtures. We find that an average of each species' activity weighted by its amount provides a quantity which tunes the dynamic and steady-state behaviors of active mixtures.

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Wang, Li Ming, Yi Qiu Tan, and Zhen Wu Shi. "Characteristics of Different Warm Mix Asphalt Compacted at Low Temperature." Advanced Materials Research 255-260 (May 2011): 3166–70. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.3166.

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Additives on low temperature compaction and performances of compacted mixtures, the author devised low temperature environment compaction test, and then, comparison tests of volume parameters, high temperature stability, low temperature crack resistance and water sensitivity were conducted. Tests results showed that the wax additives and the surface-active additive can significantly contribute to mixtures low-temperature compactibility. The wax additive helps to improve high temperature stability obviously, and has no significant contribution to low temperature crack resistance and water sensi

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KOCISZEWSKI, Arkadiusz. "Numerical analysis of spark plugs number influence on selected parameters of combustion in piston engine." Combustion Engines 132, no. 1 (2008): 50–55. http://dx.doi.org/10.19206/ce-117286.

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The results of numerical analysis of combustion in multi-spark plug SI engine are presented in the paper. The outcome of computational analysis of lean mixtures combustion in engine with one and two spark plugs are compared. The output data was presented in graphical form as screenshots (temperature distribution) and as pressure and temperature courses in function of crank angle. 3D numerical modelling of combustion in multi-spark plug engine proved that improvement in lean mixture combustion process can be obtained by increasing the number of active ignition points. As conclusion it can be st

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Yue, Peng Cheng, Pan Fei Liu, Jian Zhon Dong, and Ping Ping Ding. "Research of Road Application Performances of Asphalt Mixtures with Active Mineral Powder." Key Engineering Materials 599 (February 2014): 218–23. http://dx.doi.org/10.4028/www.scientific.net/kem.599.218.

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In this paper the effect of Active mineral powder (AMP) on the fundamental behavior of asphalt concrete especially in moisture damage was studied. Polycyclic Soaking Marshall test and freeze-thaw and splitting test were used to investigate the resistance of mixtures to moisture damage. Dynamic stability of mixture was evaluated by soaking rutting and the fatigue life of asphalts mixture with and without AMP was measured by universal test machine (UTM). After adding AMP, Retained Marshall Stability, Tensile Strength Ratio and dynamic stability value of asphalt concrete is higher than that of no

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Cohn, D. A., Z. Ghahramani, and M. I. Jordan. "Active Learning with Statistical Models." Journal of Artificial Intelligence Research 4 (March 1, 1996): 129–45. http://dx.doi.org/10.1613/jair.295.

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For many types of machine learning algorithms, one can compute the statistically `optimal' way to select training data. In this paper, we review how optimal data selection techniques have been used with feedforward neural networks. We then show how the same principles may be used to select data for two alternative, statistically-based learning architectures: mixtures of Gaussians and locally weighted regression. While the techniques for neural networks are computationally expensive and approximate, the techniques for mixtures of Gaussians and locally weighted regression are both efficient and

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Mark, Nekhamin, Beztsennyi Ihor, Dunayevska Natalia, and Vyfatnuik Volodimir. "ON USING THE ANSYS FLUENT SOFTWARE FOR CALCULATING THE PROCESS OF BURNING A MIXTURE OF PARTICLES FROM DIFFERENT TYPES OF SOLID FUELS." Eastern-European Journal of Enterprise Technologies 4, no. 8 (106) (2020): 48–53. https://doi.org/10.15587/1729-4061.2020.209762.

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The use of binary mixtures in TPP steam generators as fuels is caused by various reasons, such as improvement of ignition conditions and the possible environmental benefits of burning binary mixtures. Since the existing boilers of TPP were calculated for burning a single type of solid fuel, the relevance of numerical modeling of the combustion processes of binary mixtures is obvious. Among the software widely used to estimate the operation of energy devices is the ANSYS FLUENT program, whose specification does not include the procedure for using it in order to simulate the combustion of solid-

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Pavlov, Boris D., Evgeny P. Kovalenko, Alexander P. Susla, and Victoria A. Dmitrieva. "RESEARCH OF THE PROCESSES OF DECOMPOSITION AND COMBUSTION OF MIXTURES OF AMMONIUM NITRATE WITH ACTIVE COAL." Bulletin of the Saint Petersburg State Institute of Technology (Technical University) 65 (2023): 28–31. http://dx.doi.org/10.36807/1998-9849-2023-65-91-28-31.

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The influence of active carbon of BAU-A grade on ammonium nitrate decomposition process is considered. It is shown that the introduction of even 1% of carbon can significantly reduce the temperature of the beginning of its intensive decomposition. The decomposition process is greatly influenced by the external specific surface area of the active carbon and its content in the mixture. The combustion of mixtures of ammonium nitrate with active carbon and the influence of various factors on the process are considered.

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Savych, Alona, Svetlana Marchyshyn, Halyna Kozyr, and Nadiya Yarema. "Determination of inulin in the herbal mixtures by GC-MS method." Pharmacia 68, no. 1 (2021): 181–87. http://dx.doi.org/10.3897/pharmacia.68.e55051.

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The herbal mixtures due to the wide range of biologically active substances can influence on various links of the pathogenetic mechanism of development of diabetes mellitus and its complications. The carbohydrates, especially inulin, deserve the particular attention through their hypoglycemic, hypolipidemic, anticholesterolemic and detoxifying activities. The aim of the study was to investigate the content of inulin in the herbal mixtures No. 3, No. 4, No. 7, No. 13 and No. 19, which are used in folk medicine for the prevention and treatment of diabetes mellitus type 2 in Ukraine. The quantity

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Savych, Alona, Svetlana Marchyshyn, Halyna Kozyr, and Nadiya Yarema. "Determination of inulin in the herbal mixtures by GC-MS method." Pharmacia 68, no. (1) (2021): 181–87. https://doi.org/10.3897/pharmacia.68.e55051.

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The herbal mixtures due to the wide range of biologically active substances can influence on various links of the pathogenetic mechanism of development of diabetes mellitus and its complications. The carbohydrates, especially inulin, deserve the particular attention through their hypoglycemic, hypolipidemic, anticholesterolemic and detoxifying activities. The aim of the study was to investigate the content of inulin in the herbal mixtures No. 3, No. 4, No. 7, No. 13 and No. 19, which are used in folk medicine for the prevention and treatment of diabetes mellitus type 2 in Ukraine. The quantity

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Abraham, Douglas, James Gelb, and Andrew Oldag. "Rayleigh‐non‐Rayleigh mixtures for active sonar clutter." Journal of the Acoustical Society of America 128, no. 4 (2010): 2380. http://dx.doi.org/10.1121/1.3508463.

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Zhao, Jing, Shiliang Sun, Huijuan Wang, and Zehui Cao. "Promoting active learning with mixtures of Gaussian processes." Knowledge-Based Systems 188 (January 2020): 105044. http://dx.doi.org/10.1016/j.knosys.2019.105044.

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Kolykhalov, I. V., and A. V. Patutin. "Multiple directional hydraulic fracturing with chemically active mixtures." Journal of Mining Science 52, no. 3 (2016): 487–92. http://dx.doi.org/10.1134/s1062739116030694.

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Soldera, Armand, and Robert E. Prud'homme. "Epitaxial Crystallization in Mixtures of Optically Active Polyesters." Macromolecules 30, no. 10 (1997): 3107–9. http://dx.doi.org/10.1021/ma960489+.

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Bratychak Jr, Mykhailo, Natalia Chopyk, and Victoria Zemke. "Kinetics of Low Molecular Substances Sorption by the Polymer Mixtures." Chemistry & Chemical Technology 18, no. 3 (2024): 372–78. http://dx.doi.org/10.23939/chcht18.03.372.

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The sorption capacity of polymer blends was analyzed on the basis of absorption kinetics. The study was carried out in an adsorption-active medium with different degrees of deformation. Heptane and butanol were used as adsorption-active media. The influence of the chemical nature of the adsorbate on the sorption process was studied. The free volume fractions for each sample of the composition were calculated. The ability of materials to absorb different amounts of substances allows us to identify the behavior peculiarities of the interfacial regions of different chemical compositions.

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Medvetskiy I.V., Kuznetsova N. I. "Using of tank-type mixtures with herbicidal preparations for annihilation of non-desirable vegetation on objects of the Ministry of Defence of the Russian Federation." Journal of NBC Protection Corps 3, no. 1 (2019): 65–74. http://dx.doi.org/10.35825/2587-5728-2019-3-1-65-74.

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The treatment of certain areas with tank mixtures of herbicides is a rational way of reducing costs of destruction of non-desirable vegetation at the facilities of the Ministry of Defence. The article is dedicated to the results of the evaluation of effectiveness of different modern herbicidal preparations and their tank mixtures during vegetative laboratory tests and field experiment. Monocotyledonous plants (pooideae including wheat), dicotyledon plants (legumes including kidney beans), sunflower family (including sunflower itself ) and cruciferous plants (radishes) have been tested. These f

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Siebenhaar, Bernd, Bruno Casagrande, Martin Studer, and Hans-Ulrich Blaser. "An easy-to-use heterogeneous catalyst for the Knoevenagel condensation." Canadian Journal of Chemistry 79, no. 5-6 (2001): 566–69. http://dx.doi.org/10.1139/v01-072.

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Physical mixtures of alkali and earth alkali metal carbonates and commercially available zeolites were investigated as solid catalysts for the Knoevenagel condensation. Best results for the model reaction between benzaldehyde and ethyl cyanoacetate were obtained for a 1:4 mixture of Na2CO3 with 4 Å molecular sieves (MS). The effects of the following parameters were investigated: structure of substrate, type and basicity of metal carbonate and zeolite, and temperature. Between 50 and 90°C chemical yields up to >90% were obtained without continuous removal of water and with reasonable catalys

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Jabłoński, Maciej. "BET-Type Adsorption Isotherms for Gaseous Mixtures." Adsorption Science & Technology 23, no. 6 (2005): 487–96. http://dx.doi.org/10.1260/026361705774859875.

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A formalism for describing the adsorption of gaseous mixtures at solid surfaces was derived as an extension of the BET theory. The following additional assumptions were made; the composition of all the adsorbed layers is the same and interaction occurs between the component molecules in the adsorbed layers. The proposed equations were compared with the experimental data obtained from measurements of the adsorption of an acetone—methanol mixture onto N-type active carbon.

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Hadi, Alaa N., and Talib M. Abbas. "Solvatochromic behavior on the absorption, transmittance and emission spectra for some organic dyes as active media." Edelweiss Applied Science and Technology 8, no. 6 (2024): 4026–33. http://dx.doi.org/10.55214/25768484.v8i6.2881.

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This research examines the absorption and emission (fluorescence) spectra of several solutions containing mixtures of organic dyes dissolved in ethanol, analyzed at three distinct concentrations (0.1, 0.2, 0.3 mM) for each mixture. Two organic dyes were combined: (Fluorescein + Eosin), (Fluorescein + Methyl Orange), and (Malachite Green + Azure B), each with a defined weight. As the concentration of these dye mixtures decreases, so do the absorbance values and an increase in transmittance values and vice versa. This is consistent with the Beer-Lambert law, which also leads to a decrease in the

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Kannan, Govind, Issa M. S. Panahi, and Richard W. Briggs. "Sequentially Adapted Parallel Feedforward Active Noise Control of Noisy Sinusoidal Signals." Advances in Acoustics and Vibration 2009 (June 24, 2009): 1–13. http://dx.doi.org/10.1155/2009/694290.

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A large class of acoustic noise sources has an underlying periodic process that generates a periodic noise component, and thus their acoustic noise can in general be modeled as the sum of a periodic signal and a randomly fluctuating signal (usually a broadband background noise). Active control of periodic noise (i.e., for a mixture of sinusoids) is more effective than that of random noise. For mixtures of sinusoids in a background broadband random noise, conventional FXLMS-based single filter method does not reach the maximum achievable Noise Attenuation Level (NALmax⁡). In this paper, an alte

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Aruntaş, Hüseyin Yilmaz, Erkan Yildiz, and Gökhan Kaplan. "The engineering performance of eco-friendly concretes containing diatomite fly ash and ground granulated blast furnace slag." Acta Polytechnica 62, no. 5 (2022): 505–21. http://dx.doi.org/10.14311/ap.2022.62.0505.

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Approximately 10 % of CO2 is emitted from an ordinary Portland cement production. In cement and concrete production, CO2 emissions can be greatly reduced by using Supplementary Cementitious Materials (SCMs). In addition, the microstructure and durability properties of concrete are greatly improved when silica-rich SCMs are used. In this study, Eco-Friendly concrete design was carried out using three different SCMs. Diatomite, ground granulated blast furnace (GGBFS) and fly ash (FA) were used as the SCM in the concrete mixtures. SCMs were used instead of cement at ratios of 5, 10, 15, and 20 wt

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Marioane, Cristina-Adela, Mădălin Bunoiu, Mădălina Mateescu, Paula Sfîrloagă, Gabriela Vlase, and Titus Vlase. "Preliminary Study for the Preparation of Transmucosal or Transdermal Patches with Acyclovir and Lidocaine." Polymers 13, no. 20 (2021): 3596. http://dx.doi.org/10.3390/polym13203596.

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The present study aimed to prepare and evaluate patches for the controlled release of lidocaine/acyclovir and the binary mixture between lidocaine: acyclovir in the oral cavity. Mucoside adhesive patches containing 12.5 mg/cm2 lidocaine/acyclovir or binary mixture base were developed by a solvent casting method using sodium alginate, polyvinylpyrrolidone (PVP), glycerol (Gly), polyvinyl alcohol (PVA), and Span 80 (S). Binary mixtures between all components were prepared before the patches’ formulation in order to be able to check the substance compatibility. All formulated patches were analyze

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Cinar, Muhammet. "Utilization of Earthquake Demolition Wastes and Afşin–Elbistan Fly Ash for Soil Improvement after the Kahramanmaraş Earthquake (6 February 2023)." Sustainability 16, no. 2 (2024): 538. http://dx.doi.org/10.3390/su16020538.

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Türkiye is surrounded by active faults that have the potential to produce big earthquakes. Recently, one of these faults has become active. Two earthquakes of magnitude 7.7 and 7.6 occurred 9 h apart on 6 February 2023 in Kahramanmaraş. It is reported that 150 million tons of earthquake demolition waste (EDW) is estimated to be produced as a result of those natural hazards. This waste poses a serious risk to both the environment and human health. Its use in geotechnical applications will provide serious environmental benefits. In this study, Afşin–Elbistan fly ash (AEFA) and EDW were used to s

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Jančíková, Veronika, and Michal Jablonský. "Exploiting Deep Eutectic Solvent-like Mixtures for Fractionation Biomass, and the Mechanism Removal of Lignin: A Review." Sustainability 16, no. 2 (2024): 504. http://dx.doi.org/10.3390/su16020504.

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Green solvents, which include deep eutectic solvent-like mixtures (DES-like mixtures), are categorized as ecological and economical solvents for the pretreatment and fractionation of different types of biomasses. DES-like mixtures represent a group of the most promising green solvents for lignocellulosic pretreatment and are currently used effectively in the biomass pretreatment process. The present work describes the latest applications of DES-like mixtures in biomass delignification processes and, at the same time, summarizes the mechanism of action and influence of DES-like mixture systems

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Derivaux, Jean-François, Robert L. Jack, and Michael E. Cates. "Active–passive mixtures with bulk loading: a minimal active engine in one dimension." Journal of Statistical Mechanics: Theory and Experiment 2023, no. 8 (2023): 083212. http://dx.doi.org/10.1088/1742-5468/acecfa.

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Abstract We study a one-dimensional mixture of active (run-and-tumble) particles and passive (Brownian) particles, with single-file constraint, in a sawtooth potential. The active particles experience a ratchet effect and this generates a current, which can push passive particles against an applied load. The resulting system operates as an active engine. Using numerical simulations, we analyse the efficiency of this engine and we discuss how it can be optimised. Efficient operation occurs when the active particles self-organise into teams, which can push the passive ones against large loads by

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Murakami, Isao, Hiroyuki Hosono, Shigeto Suzuki, Junichi Kurihara, Fumio Itagaki, and Machiko Watanabe. "Enhancement or Suppression of ACE Inhibitory Activity by a Mixture of Tea and Foods for Specified Health Uses (FOSHU) That Are Marketed as “Support for Normal Blood Pressure”." ISRN Pharmaceutics 2011 (August 4, 2011): 1–4. http://dx.doi.org/10.5402/2011/712196.

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The ACE inhibitory activities of mixtures of FOSHUs (Healthya, Goma-Mugicha, Lapis Support and Ameal) were examined in order to identify any antihypertensive interactions. Among combinations of Healthya with other samples that contain active peptides, only that with Ameal was found to have no inhibitory activity. Enhanced activity was observed in 2 other mixtures. The activity of a mixture of tea polyphenols and the whey component extracted from an Ameal solution was significantly decreased, thus demonstrating that whey protein lowered the ACE inhibitory activity of Healthya. Although oral adm

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Hadad, Ghada M., Alaa El-Gindy, and Waleed M. M. Mahmoud. "Development and Validation of Chemometrics-Assisted Spectrophotometry and Liquid Chromatography Methods for the Simultaneous Determination of the Active Ingredients in Two Multicomponent Mixtures Containing Chlorpheniramine Maleate and Phenylpropanolamine Hydrochloride." Journal of AOAC INTERNATIONAL 90, no. 4 (2007): 957–70. http://dx.doi.org/10.1093/jaoac/90.4.957.

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Abstract Multivariate spectrophotometric calibration and liquid chromatography (LC) methods were used for the simultaneous determination of the active ingredients in 2 multicomponent mixtures containing chlorpheniramine maleate and phenylpropanolamine hydrochloride with ibuprofen and caffeine (mixture 1) or with propyphenazone (mixture 2). For the multivariate spectrophotometric calibration methods, principal component regression (PCR) and partial least squares (PLS-1), a calibration set of the mixtures consisting of the components of each mixture was prepared in distilled water. A leave-1-out

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Gaire, Sudip, Michael Scharf, and Ameya Gondhalekar. "Synergistic Toxicity Interactions between Plant Essential Oil Components against the Common Bed Bug (Cimex lectularius L.)." Insects 11, no. 2 (2020): 133. http://dx.doi.org/10.3390/insects11020133.

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Management of the common bed bug (Cimex lectularius L.) necessitates the use of multiple control techniques. In addition to synthetic pesticides and mechanical interventions, plant-derived essential oils represent one of the control options. Mixtures of two or more essential oil components (monoterpenoids) exhibit synergistic toxicity effects against insects due to increased cuticular penetration. Monoterpenoids, such as carvacrol, eugenol and thymol, are neurologically active and inhibit the nerve firing activity of C. lectularius. However, the effects of mixtures of these monoterpenoids on t

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Tretjakova, Rasma, Samanta Misiņa, Aurelija Deksne, Aija Brakovska, Jana Paidere, and Sergejs Kodors. "THE APPLICATION PERSPECTIVES OF LAKE CLAY INFUSED WITH NATURAL ACTIVE AGENTS - ESSENTIAL OILS IN COSMETOLOGY AND DERMATOLOGY." ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 22, 2024): 383–87. http://dx.doi.org/10.17770/etr2024vol1.7963.

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The aim of the research is to experimentally test and scientifically substantiate the mixture of lake clay and a natural active agent – essential oil, in perspective of its application in cosmetology and dermatology. Sensory properties of lake clay and mixtures of lake clay with essential oils were tested. The presence and quantity of Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans, Escherichia coli, and aerobic mesophilic microorganisms in lake clay and lake clay with essential oils mixtures were determined. Thyme (Thymus vulgaris), apple mint (Mentha suaveolans), and caraway

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