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Готові списки джерел за темами / Acetone-ethanol medium / Статті в журналах

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Статті в журналах з теми "Acetone-ethanol medium"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

D.T.Tayade*, and R.D.Isankar. "GREEN SYNTHESIS OF N'-SUBSTITUTED-N"-[4-HYDROXY-3- (1H-INDOL-2-YL) PHENYLDICARBONODITHIOIMIDEDIAMIDE." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 04 (2018): 2281–83. https://doi.org/10.5281/zenodo.1217987.

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In this work we synthesized a novel series of N’-substituted-N”-[4-hydroxy-3-(1H-indol-2-yl) phenyldicarbonodithioimidediamide by green synthesis parameters from N’-[4-hydroxy-3-(1H-indol-2-yl) phenyl] thiourea and substituted thioformamide. Previously such types of reactions were carried out in acetone medium but we developed new reaction condition in which percentage of acetone was reduced. During synthesis we carried out these reactions in various compositions of ethanol-acetone medium. This method has broad applications due to its efficiency for accelerating a course of o

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2

D.T.Tayade*, R. D. Thombare S.A. Waghmare. "SYNTHESIS OF 5-{(4-AMINO-N-[2-(DIETHYLAMINO)ETHYL]- o-ANISAMIDO-5-YL}-AMINO-3-SUBSTITUTEDIMINO-7- SUBSTITUTEDIMINO-1,2,4,6-TRITHIAZEPINES." Indo American Journal of Pharmaceutical Sciences 04, no. 11 (2017): 4492–96. https://doi.org/10.5281/zenodo.1067612.

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A novel series of 5-{(4-amino-N-[2-(diethylamino)ethyl]-o-anisamido-5-yl}-amino-3-substitutedimino-7- substitutedimino-1,2,4,6-trithiazepines was synthesized by the interactions of 4-amino-5-substituteddithiobiureto-N- [2-(diethylamino)ethyl]-o-anisamides with phenylisothio carbamoyldichloride in acetone-ethanol medium. The structures of all the synthesized compounds were justified on the basis of chemical characteristics, elemental analysis and spectral studies. Keywords: 5-{(4-Amino-N-[2-(diethylamino)ethyl]-o-anisamido-5-yl}-amino-3-phenylimino-7-ethylimino-1,2,4,6- trithiazepine, 4-amino-5

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3

Snigur, D. V., A. N. Chebotarev, T. M. Shcherbakova, E. M. Rakhlytskaya, and V. V. Shapovalenko. "IONIZATION OF ETHANOLAMINES IN WATER- ORGANIC MEDIA." Odesa National University Herald. Chemistry 28, no. 1(84) (2023): 53–57. http://dx.doi.org/10.18524/2304-0947.2023.1(84).277061.

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In this paper, the ionization constants (pKa) of some nitrogen-containing organic bases (monoethanolamine, diethanolamine and triethanolamine) in water-ethanol, water-acetone and water-acetonitrile solutions at various concentrations of organic solvent in the studied systems have been determined by the potentiometric titration method. It was found that the values of pKa of monoethanolamine, diethanolamine and triethanolamine in aqueous-organic solutions naturally decreases with increasing concentration of organic solvent in the system. It was shown that their nature and the physico-chemical pr

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4

D.T.Tayade*, R. D. Thombare S.A. Waghmare. "SYNTHESIS OF 5-{(4-AMINO-N-[2-(DIETHYLAMINO)ETHYL]-o-ANISAMIDO-5-YL}-AMINO-3-SUBSTITUTEDIMINO-7-SUBSTITUTEDIMINO-1,2,4,6-TRITHIAZEPINES." Indo American Journal of Pharmaceutical Sciences 04, no. 11 (2017): 4492–96. https://doi.org/10.5281/zenodo.1067338.

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<em>A novel series of 5-{(4-amino-N-[2-(diethylamino)ethyl]-o-anisamido-5-yl}-amino-3-substitutedimino-7-substitutedimino-1,2,4,6-trithiazepines was synthesized by the interactions of 4-amino-5-substituteddithiobiureto-N-[2-(diethylamino)ethyl]-o-anisamides with phenylisothio carbamoyldichloride in acetone-ethanol medium.  The structures of all the synthesized compounds were justified on the basis of chemical characteristics, elemental analysis and spectral studies.</em> <strong>Keywords: </strong><em>5-{(4-Amino-N-[2-(diethylamino)ethyl]-o-anisamido-5-yl}-amino-3-phenylimino-7-ethylimino

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5

Tekiela, Agata, Łukasz Furmanek, Magdalena Andrusiewicz, et al. "Can lichen secondary compounds impact upon the pathogenic soil fungi Fusarium oxysporum and F. avenaceum?" Folia Cryptogamica Estonica 58 (September 27, 2021): 165–81. http://dx.doi.org/10.12697/fce.2021.58.18.

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The antifungal activity of secondary lichen metabolites extracted by means of acetone and ethanol from Cetraria islandica, Cladonia mitis, C. rangiferina, Pseudevernia furfuracea and Usnea dasopoga on the pathogenic fungi Fusarium oxysporum and F. avenacuem was examined. The activity of extracted compounds was tested after their mixture with PDA medium before solidification. The most active extracts inhibiting the growth of fungal mycelia contained fumarprotocetraric, salazinic and usnic acids, and atranorin. Unparalleled activity was demonstrated by an ethanol extract from mixed C. islandica

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6

P., V. Raut* P. S. Bodakhe S. A. Waghmare D. T. Tayade. "SYNTHESIS OF 2-SUBSTITUTEDGUANIDINO-4-SUBSTITUTED-IMINE-6-SUBSTITUTEDIMINO-1,3,5-THIADIAZINES." Indo American Journal of Pharmaceutical Sciences 04, no. 11 (2017): 4644–50. https://doi.org/10.5281/zenodo.1069718.

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A novel series of 2-substitutedguanidino-4-substitutedimine-6-sub-stitutedimino-1,3,5- thiadiazines (IIIa1 -e 5 ) have been recently synthesized by refluxing N-methylformamidino-N’- phenyliminothiocarbamide also called as 1-(N-substitutedcarbamimidoyl)3-{N-(E)- substitutedmethylidinecar-bamimidoyl}thiourea (Ia-e) with various isocyanodichloride (II1-5) in acetone-ethanol medium in 1:1 molar proportion. The structure of all the synthesized compounds was justified on the basis of chemical characteristics, elemental analysis and IR, NMR and mass spectral analysis. Keywords: Guanidine, 1,3,5

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7

Chan Kim, Sung, Ki Yong Lee, and Anthony Hamins. "Energy balance in medium-scale methanol, ethanol, and acetone pool fires." Fire Safety Journal 107 (July 2019): 44–53. http://dx.doi.org/10.1016/j.firesaf.2019.01.004.

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8

Wahidiyah, Dwi Retno Nurotul, Bambang Setiaji, and Iqmal Tahir. "UTILIZATION OF ACTIVATED ZEOLITE AS MOLECULAR SIEVE IN CHROMATOGRAPHIC COLUMN FOR SEPARATION OF COAL TAR COMPOUNDS." Indonesian Journal of Chemistry 4, no. 2 (2010): 132–38. http://dx.doi.org/10.22146/ijc.21866.

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Application of activated zeolite (ZAA) as molecular sieve to separate compounds of coal tar from vaccum fractional distillation, have been done. The size of zeolite was 10-20 mesh and used as solid phase in column chromatography with length of 30 cm. The first step of the research was coal pyrolisis and the product (tar) was distillated by fractional column and vaccum system at reduced pressure 44 cmHg and maximum temperature at 200 oC. The distillate from this procedure was flowed to the column chromatography of zeolite (ZAA). The compound absorbed by zeolite was eluted with varying solvents,

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9

Kazemi, Nazli, Nastaran Gholizadeh, and Petr Musilek. "Selective Microwave Zeroth-Order Resonator Sensor Aided by Machine Learning." Sensors 22, no. 14 (2022): 5362. http://dx.doi.org/10.3390/s22145362.

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Microwave sensors are principally sensitive to effective permittivity, and hence not selective to a specific material under test (MUT). In this work, a highly compact microwave planar sensor based on zeroth-order resonance is designed to operate at three distant frequencies of 3.5, 4.3, and 5 GHz, with the size of only λg−min/8 per resonator. This resonator is deployed to characterize liquid mixtures with one desired MUT (here water) combined with an interfering material (e.g., methanol, ethanol, or acetone) with various concentrations (0%:10%:100%). To achieve a sensor with selectivity to wat

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10

Makhmur, Ahmad, and Prasad Panda Bibhu. "Biopigments Produced by Monascus purpureus Through Solid State Fermentation: HPTLC Finger Printing Analysis." SVOA Microbiology 4, no. 1 (2023): 01–12. https://doi.org/10.58624/SVOAMB.2023.04.024.

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Анотація:

The current study aims to conduct HPTLC finger printing analysis of various extracts of Monascus purpureus biopigments (water extract, acetone extract, chloroform extract, acetonitrile extract, petroleum ether extract, methanol extract, ethanol extract, hexane extract). Natural and synthetic pigments both play an important roles as biocolourants in the food and pharmaceutical industries. The most recent HPTLC technique helps useful fingerprint analysis to determine the identity and composition of natural phytomolecules. Solid state fermentation was carried out with the help of a production med

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11

Abbas, F. S., A. S. Alaboodi, and A. A. Abojassim. "Studying the effect of the solvent on the spectral properties of the Eosin-y Dye that used as medical laser medium." CARDIOMETRY, no. 25 (February 14, 2023): 1463–67. http://dx.doi.org/10.18137/cardiometry.2022.25.14631467.

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In this work, four kinds of solvents (Acetone, ethanol, methanol, and Water) were used for studying their effect of the spectral properties of the Eosin-y dye. One concentration used for all solvents which was (1*10-5 m/l). The results show that the Fluorescence and Quantum Efficiency decreased with increasing the solvents polarity where the highest value was found in Acetone. Florescence Life-Time, Radiation Life-Time, and stokes shift measured for all solvents. The absorption spectrum shows shifting toward (long) red wavelengths with increasing the viscosity of the solvents. Florescence spec

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12

Bautista-Ortín, Ana Belén, Naiara Busse-Valverde, Pedro Rodriguez-Rodriguez, Estefanía Jimenez-Pascual, Rocío Gil-Muñoz, and Encarnación Gómez-Plaza. "Qualitative composition and extractability of grape skin tannins during the ripening period. Role of the extraction solvent." OENO One 47, no. 2 (2013): 137. http://dx.doi.org/10.20870/oeno-one.2013.47.2.1539.

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<p style="text-align: justify;"><strong>Aims</strong>: The changes that skin tannins undergo during ripening, which are crucial for their extractability and transfer to wine, were followed in Monastrell grape skins. To elucidate whether the commonly used analytical method involving extraction with 70 % acetone overestimates the quantity of tannins that could be extracted during the winemaking process, the extraction with aqueous 12.5 % ethanol was also monitored throughout the ripening period.</p><p style="text-align: justify;"><strong>Methods and results&lt

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13

Wang, Shaohua, Yanping Zhang, Hongjun Dong, et al. "Formic Acid Triggers the “Acid Crash” of Acetone-Butanol-Ethanol Fermentation byClostridium acetobutylicum." Applied and Environmental Microbiology 77, no. 5 (2011): 1674–80. http://dx.doi.org/10.1128/aem.01835-10.

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ABSTRACTSolvent production byClostridium acetobutylicumcollapses when cells are grown in pH-uncontrolled glucose medium, the so-called “acid crash” phenomenon. It is generally accepted that the fast accumulation of acetic acid and butyric acid triggers the acid crash. We found that addition of 1 mM formic acid into corn mash medium could trigger acid crash, suggesting that formic acid might be related to acid crash. When it was grown in pH-uncontrolled glucose medium or glucose-rich medium,C. acetobutylicumDSM 1731 containing the empty plasmid pIMP1 failed to produce solvents and was found to

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14

Hassan, Ahmed, H. A. Azab, S. A. El Gyar, and Z. A. Khafagy. "Medium effect on the second-stage dissociation constant of N-(2-acetamido)imino diacetic acid (H2ADA)." Canadian Journal of Chemistry 70, no. 6 (1992): 1684–87. http://dx.doi.org/10.1139/v92-211.

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The second-stage dissociation constant values of N-(2-acetamido)imino diacetic acid (H2ADA) were determined at 25 ± 0.1 °C by potentiometric titration in different mixed-solvent mixtures (methanol, ethanol, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), acetone, and dioxane). It was observed that the pKa value is slightly influenced as the solvent is enriched in methanol and ethanol, and remains practically constant in the presence of different amounts of DMF and DMSO. A prounounced change in the pKa value was observed as the solvent is enriched in acetone or dioxane. These results are di

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15

Doroftei, Corneliu, Gabriel Murariu, and Marius Dobromir. "Porous La-Fe-O Perovskite as Catalyst for Combustion of Volatile Organic Compounds." Materials 18, no. 9 (2025): 2008. https://doi.org/10.3390/ma18092008.

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Porous nanocrystalline lanthanum perovskite La-Fe-O (LaFeO3) powders were synthesized by the sol–gel self-combustion method, using polyvinyl alcohol as the colloidal medium. The perovskite structure of the material, without secondary phases, was obtained at a calcination temperature of 900 °C for 40 min. The obtained powder was tested for catalytic activity at moderate temperatures (50–550 °C) for ethanol, methanol, acetone, benzene, and Pb-free gasoline vapors. Catalytic combustion begins at quite low temperatures (60–200 °C), compared to normal combustion, and this can be attributed to the n

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16

Evstaf‘ev, S. N., E. S. Fomina, N. P. Tiguntceva, and S. S. Shashkina. "Radical transformations of organic solvents under sub- and supercritical conditions." Proceedings of Universities. Applied Chemistry and Biotechnology 11, no. 2 (2021): 195–204. http://dx.doi.org/10.21285/2227-2925-2021-11-2-195-204.

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A comparative study of chemical transformations of ethanol, acetone and dimethyl carbonate was performed in a temperature range from 200 to 300 °C. These compounds are widely used as solvents for processing vegetable raw materials. Therefore, knowing their behaviour in a reaction medium is necessary to understand the mechanism of sub- and supercritical extraction of the vegetable raw materials and the role of solvents in this processуы. It was established that the investigated compounds under certain conditions function as a source of free radicals; thus, they can contribute to the radical dec

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17

Devhadrao, NV, AS Bansode, VS Shende, et al. "In-Vitro Anti-Fungal Activity and Phytochemical Screening of Stem Bark Extracts from Ventilago denticulata." Journal of Drug Delivery and Therapeutics 9, no. 4-s (2019): 359–62. http://dx.doi.org/10.22270/jddt.v9i4-s.3326.

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Анотація:

The objective of the present study was to assess the antifungal activity of pet. Ether extract, acetone extract, ethyl acetate, and ethanol bark extract of Ventilago denticulata (VD).The material was dried in shade made to a coarse powder and weighted quantity of the powder (1000 g) was subjected to hot percolation in a soxhlet apparatus using petroleum ether, ethyl acetate, acetone and ethanol, at a temperature range of 40-800C. Phytochemical tests were done in presence of phytoconstituents like glycosides, alkaloids, tannins, steroids, flavonoids. The anti-fungal activity was carried out by

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18

Elmer, Wade H., and Christine T. Stephens. "Comparison of Technique for Eliminating Contaminants from Asparagus Seeds." HortScience 23, no. 6 (1988): 1031–32. http://dx.doi.org/10.21273/hortsci.23.6.1031.

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Abstract Thirteen seed treatments were compared to determine the optimal method to produce asparagus (Asparagus officinalis L. cv. Viking) seeds suitable for axenic culture. Treated seeds were examined for microbial contamination by culture on an agar medium and for percent germination by incubation on moistened paper. All treatments that included benomyl in acetone (2.5%, w/v) with 20% household bleach (0.1% sodium hypochlorite) were superior to the other treatments in eliminating bacterial and fungal contaminants without decreasing seed germination. Ethanol (70%) and hydrogen peroxide also d

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19

KALLOL, K. GHOSH, and GHOSH SHARMISTHA. "Medium Effects on Alkaline Hydrolysis of N-Phenylbenzohydroxamic Acid." Journal of Indian Chemical Society Vol. 72, Jan 1995 (1995): 19–23. https://doi.org/10.5281/zenodo.5900435.

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School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492 010 <em>Manuscript received 30 April 1993, revised 28 July 1993, accepted 12 October 1993</em> Kinetic studies of alkaline hydrolysis of <em>N</em>-phenylbenzohydroxamic acid have been investigated in aqueous dioxane, dimethyl sulphoxide, dimethyl formamide, acetone, acetonitrile, methanol and ethanol mixtures of varying compositions (0-80%, v/v) at different temperatures (55-75°). The rate constant in all cases increases with increasing percentage of the solvent, which is attributed to solvation of the transitio

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20

Baig, Muhammad Waleed, Madiha Ahmed, Nosheen Akhtar, et al. "Caralluma tuberculata N.E.Br Manifests Extraction Medium Reliant Disparity in Phytochemical and Pharmacological Analysis." Molecules 26, no. 24 (2021): 7530. http://dx.doi.org/10.3390/molecules26247530.

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Solubility of phytoconstituents depends on the polarity of the extraction medium used, which might result in the different pharmacological responses of extracts. In line with this, ethnomedicinally important food plant (i.e., Caralluma tuberculata extracts) have been made in fourteen distinct solvent systems that were then analyzed phytochemically via total phenolic amount estimation, total flavonoid amount estimation, and HPLC detection and quantification of the selected polyphenols. Test extracts were then subjected to a battery of in vitro assays i.e., antioxidants (DDPH scavenging, antioxi

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21

González-Peñas, Helena, Thelmo A. Lú-Chau, Nicolás Botana, María Teresa Moreira, Juan M. Lema, and Gemma Eibes. "Organosolv pretreated beech wood as a substrate for acetone butanol ethanol extractive fermentation." Holzforschung 73, no. 1 (2018): 55–64. http://dx.doi.org/10.1515/hf-2018-0098.

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Abstract Acetone-butanol-ethanol (ABE) fermentation has a high potential for industrial application in lignocellulose-based biorefinery. Nevertheless, strong end-product inhibition is a severe limitation of this process, which can be partially solved by in situ product recovery techniques, such as extractive fermentation. In this work, the hydrolyzed cellulose from organosolv pre-treated beech wood (Fagus sylvatica L.) was fermented by Clostridium beijerinckii CECT 508 and compared with synthetic P2 medium in conventional and extractive fermentation processes. The conventional control fermenta

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22

Hering, Anna, Justyna Stefanowicz-Hajduk, Magdalena Gucwa, Bartosz Wielgomas, and Jadwiga Renata Ochocka. "Photoprotection and Antiaging Activity of Extracts from Honeybush (Cyclopia sp.)—In Vitro Wound Healing and Inhibition of the Skin Extracellular Matrix Enzymes: Tyrosinase, Collagenase, Elastase and Hyaluronidase." Pharmaceutics 15, no. 5 (2023): 1542. http://dx.doi.org/10.3390/pharmaceutics15051542.

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Cyclopia sp. (honeybush) is an African shrub known as a rich source of polyphenols. The biological effects of fermented honeybush extracts were investigated. The influence of honeybush extracts on extracellular matrix (ECM) enzymes responsible for the skin malfunction and aging process—collagenase, elastase, tyrosinase and hyaluronidase—was analysed. The research also included assessment of the in vitro photoprotection efficiency of honeybush extracts and their contribution to the wound healing process. Antioxidant properties of the prepared extracts were evaluated, and quantification of the m

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23

Fauzi, Basirah, Mohd Ghazali Mohd Nawawi, Roslinda Fauzi, et al. "Glucose tolerance of Clostridium acetobutylicum fermentation in the anaerobic system." BioResources 18, no. 4 (2023): 7915–22. http://dx.doi.org/10.15376/biores.18.4.7915-7922.

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Solvent-producing Clostridium acetobutylicum was purified and used in an acetone-butanol-ethanol (ABE) fermentation process. The objective of this study is to design a fermentation medium for the synthesis of butanol and determine the ideal glucose concentration for appropriate microbe ingestion. The fermentation medium was incubated at 37 °C for up to 90 h before inoculation while being sparged with nitrogen gas under anaerobic conditions. Based on the optical density of fermentation media, the growth rate was also monitored. At 60 g/L of glucose, which was the optimum condition for fermentat

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24

A., B. Wadekar. "Synthesis and Characterization of 1(4-Tolyl)-2(Phenyl thiocarbamido)-1-Ethanol." International Journal of Advance and Applied Research S6, no. 18 (2025): 20–22. https://doi.org/10.5281/zenodo.15254626.

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Анотація:

<em>Demand of active drugs molecules synthesis ceaselessly upsurges due to population growth rate. Present research scheme designed to synthesize 1(4-tolyl)-2(Phenylthiocarbamido)-1-ethanolby the interactions of 4-(2-amino-1-hydroxyehtyl) tolene and phenyl isothiocyanate in acetone medium, to isolate 1(4-Tolyl)-2(Phenylthiocarbamido)-1-ethanol. The product thus synthesized in these reactions and characterized on the basis of conventional elemental analysis, chemical characteristics and through IR, PMR, CMR and Mass spectral analysis.</em>

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25

Onoyima, C. C., F. G. Okibe, and Q. O. Sholadoye. "Effect of solvents on the synthesis of hydroxyapatite sodium alginate nanocomposites for doxorubicin drug loading and delivery." Bayero Journal of Pure and Applied Sciences 12, no. 1 (2020): 227–34. http://dx.doi.org/10.4314/bajopas.v12i1.36s.

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Анотація:

In situ preparation of hydroxyapatite-sodium alginate nanocomposite (HASA) was carried out by the wet chemical precipitation method using water, ethanol, ethyl acetate and acetone as the dissolution medium. Drug loading was carried out at neutral pH, while in vitro drug release study was carried out in synthetic body fluid (SBF) at pH 7.4 and 37 oC. The FTIR results show similar functional groups for precursors and synthesized nanocomposites. The nanocomposite prepared in water medium has the highest drug encapsulation efficiency of 83.67 %. Doxorubicin release profile comparison using differe

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26

Pytela, Oldřich, Miroslav Ludwig, and Miroslav Večeřa. "The Hammett substituent constants and effects of medium." Collection of Czechoslovak Chemical Communications 51, no. 10 (1986): 2143–50. http://dx.doi.org/10.1135/cccc19862143.

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Анотація:

The dissociation constants measured earlier for 35 substituted benzoic acids in seven solvents (water, methanol, ethanol, dimethylformamide, acetonitrile, sulfolane, and acetone) have been submitted to the principal components analysis and the factor analysis to produce sets of the Hammett substituent constants. The solvent effects have been evaluated on the dissociation constants of the substituted benzoic acids and, hence, also on the respective substituent constants. He differences have been compared between the substituent constants determined by the principal components analysis and by th

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27

Jaiswal, Swapnil Ganesh, Madhumita Patel, Devesh K. Saxena, and Satyanarayan Naik. "Comparison of Measurements of Antioxidant Activity in the Selected Leafy Vegetables Depending on Extraction Solvent." Journal of Horticultural Research 25, no. 2 (2017): 75–80. http://dx.doi.org/10.1515/johr-2017-0023.

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Abstract Four leafy vegetable species, spinach (Spinacia oleracea), amaranthus (Amaranthus viridis), fenu-greek (Trigonella foenum-graecum) and bathua (Chenopodium album), were extracted with three different solvents (80% ethanol, 80% acetone and water) for maximum recovery of phenol and antioxidant compounds in the extract. The results of extraction were compared with extraction from moringa (Moringa oleifera) leaves that is known as a very rich source of antioxidants. The study showed that, it is very difficult to justify a single solvent for extraction of antioxidant compounds from differen

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28

Swargiary, Kankan, Pannathorn Jitpratak, Akhilesh Kumar Pathak, and Charusluk Viphavakit. "Low-Cost ZnO Spray-Coated Optical Fiber Sensor for Detecting VOC Biomarkers of Diabetes." Sensors 23, no. 18 (2023): 7916. http://dx.doi.org/10.3390/s23187916.

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A non-invasive optical fiber sensor for detecting volatile organic compounds (VOCs) as biomarkers of diabetes is proposed and experimentally demonstrated. It offers a low-cost and straightforward fabrication approach by implementing a one-step spray coating of a ZnO colloidal solution on a glass optical fiber. The structure of the optical fiber sensor is based on a single-mode fiber–coreless silica fiber–single-mode fiber (SMF-CSF-SMF) structure, where the CSF is the sensor region spliced between two SMFs. The ZnO layer of a higher refractive index coated over the sensing region improves the l

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Ludwig, Miroslav, and Pavel Štverka. "Effects of Medium and Substituents on Dissociationof 4,4'-Disubstituted Bis(benzenesulfon)imides." Collection of Czechoslovak Chemical Communications 61, no. 8 (1996): 1205–14. http://dx.doi.org/10.1135/cccc19961205.

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Ten 4,4'-disubstituted bis(arenesulfon)imides of the general formula XC6H4SO2NHSO2C6H4X have been synthesized and their structures confirmed by their 1H NMR spectra. Elemental analyses are presented for the compounds not yet described. The dissociation constants of these model substances have been measured potentiometrically in pyridine, dimethylformamide, methanol, ethanol, propylene carbonate, acetone, acetonitrile, 1,2-dichloroethane and tetramethylene sulfone. The pKHA values obtained have been correlated with three sets of the Hammett substituent constants and the results have been used t

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30

M. S. Lunge, Faiza Tasmeen F Shah, M.B. Shahakar, and P.V. Raut. "A novel synthesis of 1,4-Bis[(Subsitutedphenyl)-2,4-Dithiobiureto] benzene." International Journal of Science and Research Archive 9, no. 1 (2023): 328–37. http://dx.doi.org/10.30574/ijsra.2023.9.1.0404.

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Recently in this laboratory, a direct, suitable and simple method for the synthesis of 1,4-bis[(substituted phenyl)-2,4-dithiobiureto]benzene (III a-d). A novel series of 1,4-Bis[(substituted phenyl)-2,4-dithiobiureto]benzene (III a-d) was synthesized by the interacting 1,4-dithiocarbamidobenzene (I) with substituted phenylisothiocyanates (II a-d) in acetone-ethanol medium on water bath for 4 hours. The structure of the synthesized compounds was justified on the basis of chemical characteristics, elemental and spectral analysis.

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31

Kaushal, Sandeep, Pritpal Singh, and Susheel K. Mittal. "Yttrium (III) Selective Electrode Based On Zirconium (IV) Phosphoborate." Journal of New Materials for Electrochemical Systems 17, no. 1 (2014): 005–8. http://dx.doi.org/10.14447/jnmes.v17i1.435.

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Zirconium phosphoborate based heterogeneous membrane electrode has been used as a sensor for yttrium ions in aqueous medium. The electrode shows reproducible and Nernstian behavior for yttrium ions in the oncentration range 10-4M to 10-1M with an RSD of 2%. The electrode does not show any change in response within a pH range of 5-9. The effect of internal solution concentration on the calibration curve was also studied. The electrode performance was also studied in partially non-aqueous medium (5% - 20%) of acetone and ethanol. The system was used successfully as an indicator electrode in pote

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32

Kuittinen, Suvi, Ming Yang, Erik Kaipiainen, et al. "Acetone–butanol–ethanol fermentation of non-detoxified dilute acid extracted hemicellulosic hydrolysate from the short-rotation coppice Salix schwerinii E. Wolf." BioResources 13, no. 3 (2018): 5225–40. http://dx.doi.org/10.15376/biores.13.3.5225-5240.

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The dilute acid-catalyzed extraction of hemicellulosic monosaccharides from the short-rotation coppice Salix schwerinii E. Wolf was optimized to find a balance between the yields of fermentable monosaccharides and sugar degradation products for non-detoxified acetone-butanol-ethanol fermentation with Clostridium acetobutylicum. At the same time, the cellulosic and lignin fractions were kept as intact as possible for further refining. The highest xylose and glucose yields in the liquid prehydrolysate were 65% and 9.45% of their respective original content at a combined severity of 2.29. Increas

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33

Claros, Martha, Isabel Gràcia, Eduard Figueras, and Stella Vallejos. "Hydrothermal Synthesis and Annealing Effect on the Properties of Gas-Sensitive Copper Oxide Nanowires." Chemosensors 10, no. 9 (2022): 353. http://dx.doi.org/10.3390/chemosensors10090353.

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In this study, we report a straightforward and reproducible hydrothermal synthesis of copper oxide nanowires, their morphological and chemical characterization, and their application in gas sensing. Results show that the hydrothermal process is mainly influenced by the reaction time and the concentration of the reducing agent, demonstrating the synthesis of fine and long nanowires (diameter of 50–200 nm and length of 25 µm) after 10 h of reaction with 0.1 M of pyrrole. Two different annealing temperatures were tested (205 and 450 °C) and their effect on the morphology, chemical composition, an

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34

Malik, Rayees Ahmad, Mabroukah Massuod Saad, and Surabhi Tiwari. "Effect of Extraction Time and Solvent Power on Phytochemical Screening and Antioxidant Activity of Momordica charantia L. Fruit Extracts." Asian Journal of Chemistry 31, no. 3 (2019): 647–50. http://dx.doi.org/10.14233/ajchem.2019.21715.

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This work reports the analysis of phytochemical screening and antioxidant activity of Momordica charantia L. fruit extracts at different extraction conditions. The standard procedures are achieved by ferric reducing antioxidant, nitric oxide scavenging assay methods. Extraction under different maceration periods viz. 6, 12, 24 and 48 h organic solvent especially ethanol was found more effective followed by water extract, acetone and ethyl acetate. The maximum number of phytochemicals were observed at 12 h followed by 6 h. Hence, the medium time duration influences the extraction of phytochemic

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35

Paszner, Laszlo, and H. J. Cho. "High Efficiency Conversion of Lignocellulosics to Sugars for Liquid Fuel Production by the ACOS Process." Energy Exploration & Exploitation 6, no. 1 (1988): 39–60. http://dx.doi.org/10.1177/014459878800600104.

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Decline of world oil reserves and pollution problems from burning of fossil fuels and lead require that methods for safe alternate liquid fuels be developed. Ethanol is one of the most important alternate liquid fuels since it can be produced readily by fermentation of sugars. Wood and vegetable growth are excellent sources of sugars to support an ethanol fuel economy of significant proportions. Acid Catalysed Organosolv Saccharification (ACOS) is a new means for total biomass dissolution and recover of component sugars and lignin from wood. The process uses an acidified aqueous acetone soluti

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36

Liang, Huanhuan, Lijie Chen, and Fengwu Bai. "Optimized culture medium and fermentation conditions for acetone–butanol–ethanol (ABE) production by Clostridicum acetobutylicum ATCC824." Journal of Biotechnology 136 (October 2008): S340. http://dx.doi.org/10.1016/j.jbiotec.2008.07.1978.

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37

Oliva-Rodríguez, Alejandra G., Vianey de J. Cervantes-Güicho, Thelma K. Morales-Martínez, et al. "Biohydrogen Gas/Acetone-Butanol-Ethanol Production from Agave Guishe Juice as a Low-Cost Growing Medium." Fermentation 9, no. 9 (2023): 811. http://dx.doi.org/10.3390/fermentation9090811.

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Different strategies have been assessed for the revalorization of guishe to obtain biomolecules. The juice obtained after the mechanical extraction of guishe is rich in phytochemicals and sugars which can be converted to other products. The objective of the present study was to evaluate the production of hydrogen and butanol at different guishe juice concentrations (and therefore, different sugar concentrations) via fermentation in batch mode using Clostridium acetobutylicum ATCC 824. Fermentation assays were performed in triplicate under anaerobic conditions at 35 °C for 142 h. Guishe juice w

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38

Vega Gutierrez, Sarath M., Yujuan He, Yu Cao, et al. "Feasibility and Surface Evaluation of the Pigment from Scytalidium cuboideum for Inkjet Printing on Textiles." Coatings 9, no. 4 (2019): 266. http://dx.doi.org/10.3390/coatings9040266.

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Textile inkjet printing is an increasingly popular process in the textile industry, as it allows for the incorporation of complex and detailed patterns onto fabrics, as well as the production of small and medium volumes of printed text. Unfortunately, most of the dyes used by the textile industry come from synthetic and/or non-renewable sources. There has been some research to date in using fungal pigments from wood rotting fungi (‘spalting’ fungi) as textile dyes, however these have never been tested in inkjet printing. Of particular interest is the red crystallizing pigment from Scytalidium

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39

Patil, Govind K., Pritam B. Patil, Sagar R. Pardeshi, et al. "Effect of process parameters on the recovery of lactose in an antisolvent acetone/acetone-ethanol mixture: A comparative study based on sonication medium." Ultrasonics Sonochemistry 67 (October 2020): 105128. http://dx.doi.org/10.1016/j.ultsonch.2020.105128.

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40

Bhardwaj, Aditya, and Ajay Kumar Kushwaha. "Effect of Dispersion Solutions on Optical Properties and Stability of CsPbBr₃ Perovskite Nanocrystals." ECS Journal of Solid State Science and Technology 11, no. 3 (2022): 036002. http://dx.doi.org/10.1149/2162-8777/ac5c80.

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Long-term storage stability of cesium lead-based perovskite nanocrystals, especially at ambiance conditions is a vital challenge that deters their advancement in photovoltaic applications. Herein, CsPbBr3 perovskite nanocrystals are synthesized by hot injection method and the stability of CsPbBr3 nanocrystals is investigated when dispersed in individual solvents such as Toluene, Acetone, and Ethanol as well as the combination of solvents. The synergistic effect of toluene- non-polar molecule and acetone-a polar molecule was studied and their effect on the stability of CsPbBr3 in terms of reten

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41

Goldberg, Margarita A., Olga S. Antonova, Nadezhda O. Donskaya, et al. "Effects of Various Ripening Media on the Mesoporous Structure and Morphology of Hydroxyapatite Powders." Nanomaterials 13, no. 3 (2023): 418. http://dx.doi.org/10.3390/nano13030418.

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Mesoporous hydroxyapatite (HA) materials demonstrate advantages as catalysts and as support systems for catalysis, as adsorbent materials for removing contamination from soil and water, and as nanocarriers of functional agents for bone-related therapies. The present research demonstrates the possibility of the enlargement of the Brunauer–Emmett–Teller specific surface area (SSA), pore volume, and average pore diameter via changing the synthesis medium and ripening the material in the mother solution after the precipitation processes have been completed. HA powders were investigated via chemica

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42

Roux, Denis C. D., François Caton, Isabelle Jeacomine, Guillaume Maîtrejean, and Marguerite Rinaudo. "Reversibility in the Physical Properties of Agarose Gels following an Exchange in Solvent and Non-Solvent." Polymers 16, no. 6 (2024): 811. http://dx.doi.org/10.3390/polym16060811.

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Agarose forms a homogeneous thermoreversible gel in an aqueous solvent above a critical polymer concentration. Contrary to the prevailing consensus, recent confirmations indicate that agarose gels are also stable in non-solvents like acetone and ethanol. A previous study compared gel characterisations and behaviours in water and ethanol, discussing the gelation mechanism. In the current work, the ethanol gel is exchanged with water to explore the potential reversibility of the displacement of water in agarose. Initially, the structure is characterised using 1H NMR in DMSO-d6 and D2O solvents.

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43

Graves, James F. "Biodiesel Byproduct and Biofuel Synthesizing Clostridium acetobutylicum." Journal of Student Research 6, no. 1 (2017): 109–11. http://dx.doi.org/10.47611/jsr.v6i1.320.

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In the manufacture of biodiesel, glycerol is a byproduct. Acetone-butanol-ethanol (ABE) fermentation by anaerobe Clostridium acetobutylicum ia also a source of biofuel. Growth of C. acetobutylicum in the presence of waste biodiesel glycerol byproduct was examined in this investigation. In cultures containing added glucose or a mixture of glucose and byproduct the optical density (OD) was increased and a positive fermentation reaction was exhibited while results in cultures containing byproduct or pure glycerol were similar to those in the base medium. The pH of cultures containing glucose mark

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44

Gutierrez, N. A., I. S. Maddox, K. C. Schuster, H. Swoboda, and J. R. Gapes. "Strain comparison and medium preparation for the acetone-butanol-ethanol (ABE) fermentation process using a substrate of potato." Bioresource Technology 66, no. 3 (1998): 263–65. http://dx.doi.org/10.1016/s0960-8524(98)00051-0.

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45

Grushevenko, Е. А., Т. N. Rokhmanka, A. V. Balynin, G. S. Golubev, and I. L. Borisov. "Trifluoroethylacrylate-Substituted Polymethylsiloxane—Promising Membrane Material for Separating an Abe Fermentation Mixture." Мембраны и мембранные технологии 13, no. 6 (2023): 452–63. http://dx.doi.org/10.31857/s2218117223060056.

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This work is aimed at obtaining a membrane material that is resistant to the formation of a precipitate on the surface upon contact with an ABE fermentation mixture and has a good separating ability during the pervaporation isolation of n-butanol from a water–alcohol mixture. In this regard, in this work, for the first time, the creation of pervaporation membranes based on polymethyltrifluoroethylacrylatesiloxane (F3-Acr), as well as a copolymer of polydecylmethylsiloxane and polymethyltrifluoroethylacrylatesiloxane (C10-F3-Acr) is proposed. In comparison with polydecylmethylsiloxane (C10), th

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46

Singapurwa, Ni Made Ayu Suardani, I. Putu Candra, and A. A. Made Semariyani. "Analysis of Phytochemical Compounds and Antioxidant Activity From Non-Polar to Polar Solvent Extracts In Several Types of “Basa Genep” Constituent Spices." Indonesian Food Science and Technology Journal 7, no. 2 (2024): 110–20. http://dx.doi.org/10.22437/ifstj.v7i2.31584.

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"Basa genep" is the main spice Balinese people use to process traditional cuisine. This study examines phytochemical compounds and antioxidant activity in extracts of several “Basa genep” constituent spices extracted with solvents with different polarity levels. The design used is a completely random design of 1 factor consisting of 6 treatments: ethyl acetate solvent, hexane, acetone, dichloromethane, ethanol, and methanol. Based on the results of the study, it was found that the constituent spices of "Basa genep", namely ginger, kaemfiera, galangal, turmeric, bird’s eye chilli, red chilli, o

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47

Mariichak, O. Yu, A. O. Zakharchuk, G. M. Rozantsev, and S. V. Radio. "Synthesis of lanthanum(III)-containing heteropoly compounds with a Peacock-Weakley type anion from aqueous-organic solutions." Odesa National University Herald. Chemistry 27, no. 3(83) (2023): 63–75. http://dx.doi.org/10.18524/2304-0947.2022.3(83).268769.

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Conditions necessary for the formation of La(III)-containing polyoxotungstates in solutions of the system Na2WO4 – HNO3 – La(NO3)3 – H2O/Solvent (Solvent = acetone, acetonitrile, ethanol; 50/50 vol.% Н2О: Solvent ratio) acidified to acidity Z = ν(H+)/ν(WO42–) = 0.80 were elaborated. It was established that during salting out, the addition of an organic solvent leads to the crystallization of normal salts, Na9[La(W5O18)2]·nH2O (n = 32–35). Using FT-IR spectroscopy, it was shown that the anion [La(W5O18)2]9– in the composition of the isolated salts belongs to the Peacock–Weakley type of structur

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C., M. DANI, та K. DAS A. "Reactions of Copper(II) Salts with Benzoylacetone and , γ-Picoline or Imidazole". Journal of Indian Chemical Society Vol. 63, Mar 1986 (1986): 276–77. https://doi.org/10.5281/zenodo.6240711.

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Research and Control Laboratory, Rourkela Steel Plant, Rourkela-769 011 Department of Chemistry, Government College, Rourkela-769 004 <em>Manuscript received 2 February 1984, accepted 6 February 1986</em> Six mixed ligand complexes of the type [Cu(bzac)L<sub>2</sub>] X and [Cu(bzac)L<sub>2</sub> ClO<sub>4</sub>], where bzacH - benzoyl acetone, L - \(\gamma\)-ptcoline or imidazole and X - CI<sup>-</sup> or NO\(_2^-\)  have been synthesised by reacting the cupric salts with benzoylacetone and \(\gamma\) -picoline/or imidazole in 1 : 1 : 2 molar ratio in ethanol medium The analytical, c

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49

Najim, Mohd. "Synthesis and Electrical Behavior of Sodium Doped Monoclinic SrSiO3." Engineering, Technology & Applied Science Research 13, no. 4 (2023): 11432–36. http://dx.doi.org/10.48084/etasr.5893.

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The operating temperature of solid oxide fuel cells, oxygen division membranes, and oxygen sensors is determined by oxide-ion electrolytes. There is a strong incentive to reduce the operating temperature in solid oxide fuel cells, from 800°C to 500°C. The use of low-cost Na+ instead of K+ as dopant in monoclinic SrSiO3 offers a wider solid solution range (0.1<x< 0.5) in Sr1-xNaxSiO3-δ and obtains an oxide ion conductivity of 10-2 Scm-1 at 600°C, reducing the temperature of a smooth transition to full impairment of mobile oxide ions. For electrochemical characterization, the flat surfaces

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50

Anwer, Sewgil S., Ayad K. Ali, and Şule İnci. "THE INVESTIGATION OF ELEMENTS AFFECTING CERTAIN MICROALG'S DEVELOPMENT AND POSSIBLE ANTIBACTERIAL PROPERTIES." Science Journal of University of Zakho 12, no. 3 (2024): 299–307. http://dx.doi.org/10.25271/sjuoz.2024.12.3.1286.

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During the previous few decades, the pursuit has experienced an increase for novel marine-derived molecules with potential use in the pharmaceutical, human or animal nutrition, cosmetics, and bioenergy industries. The current study aimed at obtaining the optimum growth rate of some microalgal isolates and finding their antibacterial activity. The microalgae were purified in BG11 medium and the biomass extracted using ethanol, acetone, diethyl ether and methanol was then examined for antimicrobial activity by disc diffusion and minimum inhibitory concentration methods.The optimum growth rate ob

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