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Journal articles on the topic 'SH hydrates'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Daghash, Shaden M., Phillip Servio, and Alejandro D. Rey. "From Infrared Spectra to Macroscopic Mechanical Properties of sH Gas Hydrates through Atomistic Calculations." Molecules 25, no. 23 (2020): 5568. http://dx.doi.org/10.3390/molecules25235568.

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The vibrational characteristics of gas hydrates are key identifying molecular features of their structure and chemical composition. Density functional theory (DFT)-based IR spectra are one of the efficient tools that can be used to distinguish the vibrational signatures of gas hydrates. In this work, ab initio DFT-based IR technique is applied to analyze the vibrational and mechanical features of structure-H (sH) gas hydrate. IR spectra of different sH hydrates are obtained at 0 K at equilibrium and under applied pressure. Information about the main vibrational modes of sH hydrates and the fac

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2

Daghash, Shaden, Phillip Servio, and Alejandro Rey. "First-Principles Elastic and Anisotropic Characteristics of Structure-H Gas Hydrate under Pressure." Crystals 11, no. 5 (2021): 477. http://dx.doi.org/10.3390/cryst11050477.

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Evaluating gas hydrates properties contributes valuably to their large-scale management and utilization in fundamental science and applications. Noteworthy, structure-H (sH) gas hydrate lacks a comprehensive characterization of its structural, mechanical, and anisotropic properties. Anisotropic and pressure dependent properties are crucial for gas hydrates’ detection and recovery studies. The objective of this work is the determination of pressure-dependent elastic constants and mechanical properties and the direction-dependent moduli of sH gas hydrates as a function of guest composition. Firs

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3

BELOSLUDOV, V. R., O. S. SUBBOTIN, R. V. BELOSLUDOV, H. MIZUSEKI, Y. KAWAZOE, and J. KUDOH. "THERMODYNAMICS AND HYDROGEN STORAGE ABILITY OF BINARY HYDROGEN + HELP GAS CLATHRATE HYDRATE." International Journal of Nanoscience 08, no. 01n02 (2009): 57–63. http://dx.doi.org/10.1142/s0219581x0900589x.

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Storage of hydrogen as hydrogen hydrate is a promising alternative technology to liquefied hydrogen at cryogenic temperatures or compressed hydrogen at high pressures. In this paper, computer simulation is performed based on the solid solution theory of clathrates of van der Waals and Platteeuw with some modifications that include in particular the account of multiple cage occupancies and host relaxation. The quasiharmonic lattice dynamics method employed here gives the free energy of clathrate hydrate to first order in the anharmonicity of intermolecular potential and permits to take into acc

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4

Imasato, Kazuki, Kotaro Murayama, Satoshi Takeya, Saman Alavi, and Ryo Ohmura. "Effect of nitrogen atom substitution in cyclic guests on properties of structure H clathrate hydrates." Canadian Journal of Chemistry 93, no. 8 (2015): 906–12. http://dx.doi.org/10.1139/cjc-2014-0553.

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The effect of substituting nitrogen heteroatoms in the cyclohexane ring of methylcyclohexane on the structure and guest dynamics of structure H (sH) clathrate hydrates with methane help gases are studied through experimental synthesis, powder X-ray diffraction (PXRD) measurements, and classical molecular dynamics simulation of methylcyclohexane and 1-methylpiperidine. The PXRD measurements were performed for temperatures in the range of 138 to 183 K, and the a axis and c axis lattice constants were determined in this temperature range. The PXRD results show the different thermal expansivity of

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5

Martín, Ángel, and Cor J. Peters. "Hydrogen Storage in sH Clathrate Hydrates: Thermodynamic Model." Journal of Physical Chemistry B 113, no. 21 (2009): 7558–63. http://dx.doi.org/10.1021/jp8074578.

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6

Fuseya, Go, Satoshi Takeya, and Akihiro Hachikubo. "Retracted Article: Effect of temperature and large guest molecules on the C–H symmetric stretching vibrational frequencies of methane in structure H and I clathrate hydrates." RSC Advances 8, no. 6 (2018): 3237–42. http://dx.doi.org/10.1039/c7ra12334e.

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7

Fuseya, Go, Satoshi Takeya, and Akihiro Hachikubo. "Effect of temperature and large guest molecules on the C–H symmetric stretching vibrational frequencies of methane in structure H and I clathrate hydrates." RSC Advances 10, no. 30 (2020): 17473–78. http://dx.doi.org/10.1039/d0ra02748k.

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8

Papadimitriou, N. I., I. N. Tsimpanogiannis, C. J. Peters, A. Th Papaioannou, and A. K. Stubos. "Hydrogen Storage in sH Hydrates: A Monte Carlo Study." Journal of Physical Chemistry B 112, no. 45 (2008): 14206–11. http://dx.doi.org/10.1021/jp805906c.

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9

Dobrzycki, Łukasz, Kamila Pruszkowska, Roland Boese, and Michał K. Cyrański. "Hydrates of Cyclobutylamine: Modifications of Gas Clathrate Types sI and sH." Crystal Growth & Design 16, no. 5 (2016): 2717–25. http://dx.doi.org/10.1021/acs.cgd.5b01846.

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10

Duarte, Ana Rita C., Alireza Shariati, and Cor J. Peters. "Phase Equilibrium Measurements of Structure sH Hydrogen Clathrate Hydrates with Various Promoters†." Journal of Chemical & Engineering Data 54, no. 5 (2009): 1628–32. http://dx.doi.org/10.1021/je800993w.

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11

Nemov, N. A., O. S. Subbotin, and V. R. Belosludov. "Modeling of phase transformation sII–sH in Ar hydrates at high pressure." Computational Materials Science 49, no. 4 (2010): S256—S259. http://dx.doi.org/10.1016/j.commatsci.2009.12.025.

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12

Jin, Yusuke, Masato Kida, and Jiro Nagao. "Structural Characterization of Structure H (sH) Clathrate Hydrates Enclosing Nitrogen and 2,2-Dimethylbutane." Journal of Physical Chemistry C 119, no. 17 (2015): 9069–75. http://dx.doi.org/10.1021/acs.jpcc.5b00529.

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13

Papadimitriou, N. I., I. N. Tsimpanogiannis, A. Th Papaioannou, and A. K. Stubos. "Monte Carlo study of sII and sH argon hydrates with multiple occupancy of cages." Molecular Simulation 34, no. 10-15 (2008): 1311–20. http://dx.doi.org/10.1080/08927020802101734.

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14

Carlson, R. W., W. D. Smythe, D. L. Matson, et al. "Surface Composition of the Galilean Satellites from Galileo Near-Infrared Mapping Spectroscopy." Highlights of Astronomy 11, no. 2 (1998): 1078–81. http://dx.doi.org/10.1017/s1539299600019638.

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AbstractThe Galileo Near Infrared Mapping Spectrometer (NIMS) is currently obtaining spectral maps of Jupiter’s moons to determine the composition and spatial distribution of minerals on the satellite surfaces. Sulfur dioxide, as a frost or ice, covers much of Io’s surface, except in hot volcanic areas. A weak spectral feature at 3.15 μm suggests the presence of an OH containing surface compound (hydroxide, hydrate, or water) and a broad absorption above 1 μm is reasonably attributed to iron-containing minerals, such as feldspars and pyrite. Water is the dominant molecule covering Europa’s sur

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15

Lee, Yohan, Yunju Kim, and Yongwon Seo. "Enhanced CH4 Recovery Induced via Structural Transformation in the CH4/CO2 Replacement That Occurs in sH Hydrates." Environmental Science & Technology 49, no. 14 (2015): 8899–906. http://dx.doi.org/10.1021/acs.est.5b01640.

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16

Papadimitriou, Nikolaos I., Ioannis N. Tsimpanogiannis, Ioannis G. Economou, and Athanassios K. Stubos. "Identification of conditions for increased methane storage capacity in sII and sH clathrate hydrates from Monte Carlo simulations." Journal of Chemical Thermodynamics 117 (February 2018): 128–37. http://dx.doi.org/10.1016/j.jct.2017.09.023.

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17

Jin, Yusuke, Masato Kida, and Jiro Nagao. "Microscopic Equilibrium Determination for Structure-H (sH) Clathrate Hydrates at the Liquid–Liquid Interface: Krypton–Liquid Hydrocarbon–Water System." Journal of Chemical & Engineering Data 57, no. 9 (2012): 2614–18. http://dx.doi.org/10.1021/je300761q.

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18

Lee, Yohan, Young-ju Seo, Taewoong Ahn, et al. "CH 4 – Flue gas replacement occurring in sH hydrates and its significance for CH 4 recovery and CO 2 sequestration." Chemical Engineering Journal 308 (January 2017): 50–58. http://dx.doi.org/10.1016/j.cej.2016.09.031.

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19

Jin, Yusuke, Masato Kida, and Jiro Nagao. "Crystal Phase Boundaries of Structure-H (sH) Clathrate Hydrates with Rare Gas (Krypton and Xenon) and Bromide Large Molecule Guest Substances." Journal of Chemical & Engineering Data 59, no. 5 (2014): 1704–9. http://dx.doi.org/10.1021/je500216u.

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20

Lee, Yunseok, Seokyoon Moon, Sujin Hong, Seungin Lee, and Youngjune Park. "Observation of distinct structural transformation between sI and sH gas hydrates and their kinetic properties during CO2 capture from N2 + CO2." Chemical Engineering Journal 389 (June 2020): 123749. http://dx.doi.org/10.1016/j.cej.2019.123749.

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21

Fang, Yi, Peter B. Flemings, Hugh Daigle, Steve C. Phillips, and John T. Germaine. "Insight of in-situ porosity and compressibility of the GC 955 Gulf of Mexico hydrate reservoir." E3S Web of Conferences 205 (2020): 11005. http://dx.doi.org/10.1051/e3sconf/202020511005.

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We characterize the in-situ porosity and compressibility of a coarse-grained hydrate reservoir in Green Canyon Block 955 in the deepwater Gulf of Mexico by performing experiments both on a hydrate-bearing sandy silt pressure core and on the same reservoir material after reconstituting. Uniaxial consolidation experiments demonstrate a small difference in porosity between a reconstituted sandy silt sample (Sh = 0, n = ~ 0.38) and a hydrate-bearing sandy silt (Sh = 83%, n = 0.39-0.40) at in-situ effective stress (3.8 MPa). Both measured porosities generally agree with the in-situ porosity (~0.38

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22

Sala, Leo, Barbora Sedmidubská, Ivo Vinklárek, et al. "Electron attachment to microhydrated 4-nitro- and 4-bromo-thiophenol." Physical Chemistry Chemical Physics 23, no. 33 (2021): 18173–81. http://dx.doi.org/10.1039/d1cp02019f.

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Electron attachment to microhydrated NTP results primarily in NTP− formation. For BTP, the result depends on where the water molecules are bound in the precursor: formation of BTP− when SH-bound and fragmentation to form hydrated Br− when Br-bound.

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23

Strobel, Timothy A., Carolyn A. Koh, and E. Dendy Sloan. "Water Cavities of sH Clathrate Hydrate Stabilized by Molecular Hydrogen." Journal of Physical Chemistry B 112, no. 7 (2008): 1885–87. http://dx.doi.org/10.1021/jp7110549.

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24

Kim, Eunae, and Yongwon Seo. "A novel discovery of a gaseous sH clathrate hydrate former." Chemical Engineering Journal 359 (March 2019): 775–78. http://dx.doi.org/10.1016/j.cej.2018.11.170.

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25

Seol, Jiwoong. "Selective Inclusion of Secondary Amine Guests in sH Hydrate Systems." Journal of Chemical & Engineering Data 66, no. 8 (2021): 3335–45. http://dx.doi.org/10.1021/acs.jced.1c00388.

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26

Gauteplass, Jarand, Stian Almenningen, and Geir Ersland. "Storing CO2 as solid hydrate in shallow aquifers: Electrical resistivity measurements in hydrate-bearing sandstone." E3S Web of Conferences 146 (2020): 05002. http://dx.doi.org/10.1051/e3sconf/202014605002.

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A recent proposed carbon dioxide (CO2) storage scheme suggests solid CO2 hydrate formation at the base of the hydrate stability zone to facilitate safe, long-term storage of anthropogenic CO2. These high-density hydrate structures consist of individual CO2 molecules confined in cages of hydrogen-bonded water molecules. Solid-state storage of CO2 in shallow aquifers can improve the storage capacity greatly compared to supercritical CO2 stored at greater depths. Moreover, impermeable hydrate layers directly above a liquid CO2 plume will significantly retain unwanted migration of CO2 toward the s

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27

Jin, Yusuke, Masato Kida, and Jiro Nagao. "Structure H (sH) Clathrate Hydrate with New Large Molecule Guest Substances." Journal of Physical Chemistry C 117, no. 45 (2013): 23469–75. http://dx.doi.org/10.1021/jp403430z.

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28

Liu, Jinxiang, Youguo Yan, Jun Zhang, Jiafang Xu, Gang Chen, and Jian Hou. "Theoretical investigation of storage capacity of hydrocarbon gas in sH hydrate." Chemical Physics 525 (September 2019): 110393. http://dx.doi.org/10.1016/j.chemphys.2019.110393.

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29

Park, Seongmin, Hyery Kang, Dongwook Lim, Jong-Won Lee, Yutaek Seo, and Huen Lee. "Thermodynamic inhibition of 4-methylmorpholine while forming sH hydrate with methane." Chemical Engineering Science 138 (December 2015): 347–52. http://dx.doi.org/10.1016/j.ces.2015.08.027.

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30

Wang, Yanhong, Kaidong Yin, Xuemei Lang, et al. "Hydrogen storage in sH binary hydrate: Insights from molecular dynamics simulation." International Journal of Hydrogen Energy 46, no. 29 (2021): 15748–60. http://dx.doi.org/10.1016/j.ijhydene.2021.02.112.

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31

Wang, Dong, Bin Gong, and Yujing Jiang. "The Distinct Elemental Analysis of the Microstructural Evolution of a Methane Hydrate Specimen under Cyclic Loading Conditions." Energies 12, no. 19 (2019): 3694. http://dx.doi.org/10.3390/en12193694.

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Submarine slope instability may be triggered by earthquakes and tsunamis. Methane hydrate sediments (MHS) are commonly buried under submarine slopes. Submarine slides would probably be triggered once the MHS are damaged under cyclic loading conditions. For this reason, it is essential to research the mechanical response of MHSs under dynamic loading conditions. In this study, a series of drained cyclic biaxial compressive tests with constant stress amplitudes were numerically carried out with the distinct element method (DEM). The cyclic loading number decreased as the hydrate saturation (Sh)

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32

Duarte, Ana Rita C., Alireza Shariati, Laura J. Rovetto, and Cor J. Peters. "Water Cavities of sH Clathrate Hydrate Stabilized by Molecular Hydrogen: Phase Equilibrium Measurements." Journal of Physical Chemistry B 112, no. 7 (2008): 1888–89. http://dx.doi.org/10.1021/jp7110605.

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33

Liu, Jinxiang, Yujie Yan, Gang Chen, et al. "Prediction of efficient promoter molecules of sH hydrogen hydrate: An ab initio study." Chemical Physics 516 (January 2019): 15–21. http://dx.doi.org/10.1016/j.chemphys.2018.08.032.

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34

Chashchin, Denis D., Andrey Y. Manakov, and Alexander S. Yunoshev. "Double occupancy of large cavity of diethylamin+methane sH hydrate at low pressures." Structural Chemistry 31, no. 3 (2020): 1113–18. http://dx.doi.org/10.1007/s11224-020-01492-1.

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35

Gaikwad, Namrata, Jitendra Sangwai, Praveen Linga, and Rajnish Kumar. "Separation of coal mine methane gas mixture via sII and sH hydrate formation." Fuel 305 (December 2021): 121467. http://dx.doi.org/10.1016/j.fuel.2021.121467.

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36

Daghash, Shaden M., Phillip Servio, and Alejandro D. Rey. "Structural properties of sH hydrate: a DFT study of anisotropy and equation of state." Molecular Simulation 45, no. 18 (2019): 1524–37. http://dx.doi.org/10.1080/08927022.2019.1660326.

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37

Daghash, Shaden M., Phillip Servio, and Alejandro D. Rey. "Elastic properties and anisotropic behavior of structure-H (sH) gas hydrate from first principles." Chemical Engineering Science 227 (December 2020): 115948. http://dx.doi.org/10.1016/j.ces.2020.115948.

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38

Su, Jing. "Thiol-Mediated Chemoselective Strategies for In Situ Formation of Hydrogels." Gels 4, no. 3 (2018): 72. http://dx.doi.org/10.3390/gels4030072.

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Hydrogels are three-dimensional networks composed of hydrated polymer chains and have been a material of choice for many biomedical applications such as drug delivery, biosensing, and tissue engineering due to their unique biocompatibility, tunable physical characteristics, flexible methods of synthesis, and range of constituents. In many cases, methods for crosslinking polymer precursors to form hydrogels would benefit from being highly selective in order to avoid cross-reactivity with components of biological systems leading to adverse effects. Crosslinking reactions involving the thiol grou

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39

Aliev, Amil R., Isa R. Akhmedov, Murad G. Kakagasanov та Zakir A. Aliev. "ПРЕДПЕРЕХОДНЫЕ ЯВЛЕНИЯ В ОБЛАСТИ СТРУКТУРНОГО ФАЗОВОГО ПЕРЕХОДА В СУЛЬФАТЕ КАЛИЯ". Kondensirovannye sredy i mezhfaznye granitsy = Condensed Matter and Interphases 21, № 3 (2019): 350–57. http://dx.doi.org/10.17308/kcmf.2019.21/1148.

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Методами спектроскопии комбинационного рассеяния света исследованы структурно-динамические свойства и процессы молекулярной релаксации в кристаллическом сульфате калия K2SO4 в интервале температур от 293 до 900 К. Проанализированы температурные зависимости положения максимума v (частоты), ширины w и интенсивности I спектральной полосы, отвечающей полносимметричному колебанию v1(A) сульфат-иона SO4 2–, в спектральном интервале от 963 до 976 см–1. С ростом температуры частота колебания уменьшается. Примерно при 650 K имеют место определённые особенности температурной зависимости v(T). При дальне

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40

Frankcombe, Terry J., and Geert-Jan Kroes. "A new method for screening potential sII and sH hydrogen clathrate hydrate promoters with model potentials." Physical Chemistry Chemical Physics 13, no. 29 (2011): 13410. http://dx.doi.org/10.1039/c0cp02702b.

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41

Kadobayashi, H., H. Hirai, H. Ohfuji, et al. "Transition mechanism of sH to filled-ice Ih structure of methane hydrate under fixed pressure condition." Journal of Physics: Conference Series 950 (October 2017): 042044. http://dx.doi.org/10.1088/1742-6596/950/4/042044.

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42

Musarrat, Farhana, Nithya Jambunathan, Paul J. F. Rider, V. N. Chouljenko, and K. G. Kousoulas. "The Amino Terminus of Herpes Simplex Virus 1 Glycoprotein K (gK) Is Required for gB Binding to Akt, Release of Intracellular Calcium, and Fusion of the Viral Envelope with Plasma Membranes." Journal of Virology 92, no. 6 (2018): e01842-17. http://dx.doi.org/10.1128/jvi.01842-17.

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ABSTRACTPreviously, we have shown that the amino terminus of glycoprotein K (gK) binds to the amino terminus of gB and that deletion of the amino-terminal 38 amino acids of gK prevents herpes simplex virus 1 (HSV-1) infection of mouse trigeminal ganglia after ocular infection and virus entry into neuronal axons. Recently, it has been shown that gB binds to Akt during virus entry and induces Akt phosphorylation and intracellular calcium release. Proximity ligation and two-way immunoprecipitation assays using monoclonal antibodies against gB and Akt-1 phosphorylated at S473 [Akt-1(S473)] confirm

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43

Sinehbaghizadeh, Saeed, Jafar Javanmardi, Aliakbar Roosta, and Amir H. Mohammadi. "Estimation of the dissociation conditions and storage capacities of various sH clathrate hydrate systems using effective deterministic frameworks." Fuel 247 (July 2019): 272–86. http://dx.doi.org/10.1016/j.fuel.2019.01.189.

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44

Gendvilas, Rokas, та Raimundas Siauciunas. "The Influence of Temperature and Nature of CaO Component on the Formation of α-C₂SH". Solid State Phenomena 244 (жовтень 2015): 12–18. http://dx.doi.org/10.4028/www.scientific.net/ssp.244.12.

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In this work hydrothermal synthesis was carried out at 175 and 200 °C for 2, 8, 16, 24 and 48 h when using a stoichiometric composition (CaO/SiO2=2.0) mixtures consisting of amorphous SiO2·nH2O and CaO or Ca (OH)2. It was determined that α-C2SH forms only after 16 h of the hydrothermal synthesis at 175 °C when using CaO. It starts to recrystallize to hilebrandite after 48 h. The temperature increase to 200 °C vividly fastens the formation of α-C2SH as a noticeable amount of this calcium silicate hydrate was identified in the product already after 2 h and it became the dominant compound after 8

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45

McClelland, Robert A., and N. Esther Seaman. "Kinetic and equilibrium study of the ring opening of 2-aryl-1-methyl-1-pyrrolinium ions in aqueous solution." Canadian Journal of Chemistry 65, no. 8 (1987): 1689–94. http://dx.doi.org/10.1139/v87-283.

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Ultraviolet spectral and kinetic measurements are reported for the transformations in aqueous solution undergone by the cyclic iminium ion, the 2-aryl-1-methyl-1-pyrrolinium ion I+. In solutions with pH < 9.5 this ion equilibrates with a ring-opened hydrated form, the protonated 4-methylaminobutyrophenone SH+. The concentration of the latter at equilibrium is small, but it can be observed using nuclear magnetic resonance spectroscopy. A kinetic analysis provides a measure of the [Formula: see text] equilibrium constant. Values range from 0.06 for 4-methoxyphenyl to 0.17 for 3-chlorophenyl.

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46

Y, Madhusudan Rao, Vinay Kumar K, Jagan Mohan S, and Kiran Kumar V. "Formulation and Evaluation of Extended Release Trihexyphenidyl Hydrochloride Hard Gelatin Capsules." International Journal of Pharmaceutical Sciences and Nanotechnology 4, no. 1 (2011): 1359–67. http://dx.doi.org/10.37285/ijpsn.2011.4.1.8.

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This work aims at investigating different types and levels of hydrophilic high molecular weight matrix agents, (including HPMC K15M, Metalose-60 SH, Metalose-65 SH and Metalose-90SH-SR), hydrophobic diluent (Talc) and formulation methods (Non-aqueous granulation and direct filling by simple mere mixture) in an attempt to formulate hard gelatin extended release matrix capsules containing Trihexyphenidyl HCl (Benzhexol). The drug release from all the extended release matrix capsules show polymer as well as talc concentration dependent retardation affect. The Metalose 90SH-SR concentration was op

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47

Alagarsamy, Veerachamy, Viswas Solomon, G. Krishnamoorthy, M. T. Sulthana, and B. Narendar. "Synthesis and antimicrobial activities of 1-(3-benzyl-4-oxo-3H-quinazolin-2-yl)-4-(substituted)thiosemicarbazide derivatives." Journal of the Serbian Chemical Society 80, no. 12 (2015): 1471–79. http://dx.doi.org/10.2298/jsc150103053a.

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A series of 1-(3-benzyl-4-oxo-3H-quinazolin-2-yl)-4-(substituted) thiosemicarbazides (AS1-AS10) were obtained by the reaction of 2-hydrazino- 3-benzyl quinazolin-4(3H)-one (6) with different dithiocarbamic acid methyl ester derivatives. The key intermediate 3-benzyl-2-thioxo-2,3-dihydro-1Hquinazolin-4-one (4) was obtained by reacting benzyl amine (1) with carbon disulphide and sodium hydroxide in dimethyl sulphoxide to give sodium dithiocarbamate, which was methylated with dimethyl sulfate to yield the dithiocarbamic acid methyl ester (2) and condensed with methyl anthranilate (3) in ethanol y

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48

Pattarachotanant, Nattaporn, and Tewin Tencomnao. "Citrus hystrix Extracts Protect Human Neuronal Cells against High Glucose-Induced Senescence." Pharmaceuticals 13, no. 10 (2020): 283. http://dx.doi.org/10.3390/ph13100283.

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Citrus hystrix (CH) is a beneficial plant utilized in traditional folk medicine to relieve various health ailments. The antisenescent mechanisms of CH extracts were investigated using human neuroblastoma cells (SH-SY5Y). Phytochemical contents and antioxidant activities of CH extracts were analyzed using a gas chromatograph–mass spectrometer (GC-MS), 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) assay and 2,2′-azino-bis (3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) assay. Effects of CH extracts on high glucose-induced cytotoxicity, reactive oxygen species (ROS) generation, cell cycle arrest

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49

Choi, Wonjung, Yohan Lee, Junghoon Mok, and Yongwon Seo. "Influence of feed gas composition on structural transformation and guest exchange behaviors in sH hydrate – Flue gas replacement for energy recovery and CO2 sequestration." Energy 207 (September 2020): 118299. http://dx.doi.org/10.1016/j.energy.2020.118299.

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Janoti, Deepak Singh, and Kumud Upadhyaya. "Simultaneous Detection and Validation of Analytical Markers of Swertia chirata by HPLC-DAD to Evaluate the Potency of Extracts and Fractions against Antioxidant Potential." Asian Journal of Chemistry 33, no. 5 (2021): 977–82. http://dx.doi.org/10.14233/ajchem.2021.23085.

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Abstract:

The present study is based on the selection of extract and fraction of Swertia chirata plant for the antioxidant potential with HPLC fingerprinting, which includes the simultaneous detection and quantification of four analytical markers protocatechuic acid (PCA), swertiamarin (SM), mangiferin (MF) and amarogentin (AG) by HPLC-DAD. The yield of water extract (SWA), hydroalcoholic extract (SHA) and fractions of hydroalcoholic extracts were evaluated for their antioxidant potential against 2,2-diphenyl-1-picrylhydrazyl-hydrate free radical assay (DPPH assay), 2,2′-azino-bis(3- ethylbenzothiazolin

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