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Journal articles on the topic 'Hydrolysis. Ion exchange'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Popova, Olga, and Tatyana Finochenko. "Synthesis and properties of ion-exchange materials based on hydrolysis lignins." E3S Web of Conferences 273 (2021): 04011. http://dx.doi.org/10.1051/e3sconf/202127304011.

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Hydrolytic lignin is a large-tonnage waste product of ethyl alcohol production and is a renewable resource. The structure of lignin is characterized by the presence of a large number of hydroxyl groups, which provides the value of lignin as a raw material for synthesis in polymer chemistry. But due to their low chemical stability in dilute alkalis, acids and solvents, lignins are of little use for wide practical use. The introduction of additional functional groups into the lignin maromolecule by oxidative modification with the use of resource-saving technologies makes it possible to obtain ne

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2

Suda, Seiichi, Manabu Iwaida, Kimihiro Yamashita, and Takao Umegaki. "29Si NMR of ethoxytrimethylsilane hydrolysis and sodium ion exchange." Journal of Non-Crystalline Solids 176, no. 1 (1994): 26–32. http://dx.doi.org/10.1016/0022-3093(94)90207-0.

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3

Yeon, Kyeong-Ho, and Richard M. Lueptow. "Urease immobilization on an ion-exchange textile for urea hydrolysis." Journal of Chemical Technology & Biotechnology 81, no. 6 (2006): 940–50. http://dx.doi.org/10.1002/jctb.1471.

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4

Heng, Meng H., and Charles E. Glatz. "Ion exchange immobilization of changed ?-galactosidase fusions for lactose hydrolysis." Biotechnology and Bioengineering 44, no. 6 (1994): 745–52. http://dx.doi.org/10.1002/bit.260440611.

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5

Zhuang, Jun Ping, Lu Lin, Sun Yong, and Chun Sheng Pang. "Detoxification of Wheat Straw Formic Acid Hydrolysis and Xylitol Production." Advanced Materials Research 383-390 (November 2011): 5453–57. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.5453.

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Xylitol can be obtained from hemicelullosic fraction of lignocellulosic materials containing D-xylose. Formic acid hydrolysis is widely used in lignocellulose pretreatment. However, formic acid hydrolysis wheat straw cannot be directly used as fermentation subsequently owing to various fermentation inhibitors, especially the formic acid in reaction system and released during pretreatment. This study describes main hydrolysis components and inhibitors prepared by hydrolysis of wheat straw with formic acid solution, and different detoxification methods ware used to romve the inhibitors. Study fo

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6

Xu, Yan, Wenjing Dou, Yujun Zhao, Guangxiao Huang, and Xinbin Ma. "Kinetics Study for Ion-Exchange-Resin Catalyzed Hydrolysis of Methyl Glycolate." Industrial & Engineering Chemistry Research 51, no. 36 (2012): 11653–58. http://dx.doi.org/10.1021/ie3004489.

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7

Smith, Richard H., Steven R. Koepke, Yves Tondeur, Cheryl L. Denlinger, and Christopher J. Michejda. "The methyldiazonium ion in water: competition between hydrolysis and proton exchange." Journal of the Chemical Society, Chemical Communications, no. 14 (1985): 936. http://dx.doi.org/10.1039/c39850000936.

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8

He, Gaoyin, Fangfang Dai, Midong Shi, Qingsong Li, and Yingmin Yu. "Hydrolysis of Methylal Catalyzed by Ion Exchange Resins in Aqueous Media." Russian Journal of Physical Chemistry A 92, no. 5 (2018): 889–95. http://dx.doi.org/10.1134/s0036024418050151.

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9

Harjula, Risto, Jukka Lehto, Janneco H. Pothuis, Alan Dyer, and Rodney P. Townsend. "Ion exchange in zeolites. Part 4.—Hydrolysis and trace134Cs+exchange in K- and Na-mordenite." J. Chem. Soc., Faraday Trans. 89, no. 11 (1993): 1877–82. http://dx.doi.org/10.1039/ft9938901877.

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10

Ying, Ma, Lin Li, and Sun Da-Wen. "Preparation of high Fischer ratio oligopeptide by proteolysis of corn gluten meal." Czech Journal of Food Sciences 26, No. 1 (2008): 38–47. http://dx.doi.org/10.17221/1138-cjfs.

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A method to obtain an oligopeptide with high Fischer ratio is described. Corn gluten meal (CGM) was hydrolysed with Alcalase 2.4L using a two-step hydrolysis. In the first-step hydrolysis, the enzyme reaction conditions for hydrolysing CGM were optimised by using the orthogonal experimental design, while pH = 8.0, temperature = 55°C, enzyme to substrate ratio (3:97, w/w), and the substrate concentration = 5% were identified as the optimum conditions, under which up to 11.62% degree of hydrolysis (DH) could be obtained. The hydrolysate was then fractionated by ultrafiltration using a membrane w

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11

Tegehall, Per-Erik, T. Ojala, H. Pajari, et al. "Ion Exchange on alpha-Titanium Phosphate and Formation of New Crystalline Phases by Hydrolysis of the Ion-Exchanged Phases." Acta Chemica Scandinavica 43 (1989): 322–30. http://dx.doi.org/10.3891/acta.chem.scand.43-0322.

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12

Zhao, Li Chun, Ting Liu, and Di Liu. "Experimental Research on Ion Exchange Technique to Extract Inositol from Defatted Rice Bran." Advanced Materials Research 962-965 (June 2014): 1217–21. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.1217.

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In order to solve the problem of the long production cycle and low yield of traditional inositol production process, we made several researches based on the traditional process. We experimented on the following methods to obtain a high yield qualified products: microwave-assisted phytin extraction, ion-exchange resin phytic acid absorption, elution of weak alkaline into phytate, atmospheric pressure enzymatic hydrolysis of phytate, ion exchange resin filtration, bleaching, further concentration, crystallization and refinement of hydrolysate.

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13

Minovska, Vilma, Eleneora Winkelhausen, and Slobodanka Kuzmanova. "Lipase immobilized by different techniques on various support materials applied in oil hydrolysis." Journal of the Serbian Chemical Society 70, no. 4 (2005): 609–24. http://dx.doi.org/10.2298/jsc0504609m.

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Batch hydrolysis of olive oil was performed by Candida rugosa lipase immobilized on Amberlite IRC-50 and Al2O3. These two supports were selected out of 16 carriers: inorganic materials (sand, silica gel, infusorial earth Al2O3), inorganic salts (CaCO3, CaSO4), ion-exchange resins (Amberlite IRC-50 and IR-4B, Dowex 2X8), a natural resin (colophony), a natural biopolymer (sodium alginate), synthetic polymers (polypropylene, polyethylene) and zeolites. Lipase immobilization was carried out by simple adsorption adsorption followed by cross-linking, adsorption on ion-exchange resins combined adsorp

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14

Eichert, Diane, Christèle Combes, Christophe Drouet, and Cristian Rey. "Formation and Evolution of Hydrated Surface Layers of Apatites." Key Engineering Materials 284-286 (April 2005): 3–6. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.3.

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Nanocrystalline apatites exhibit a very fragile structured hydrated surface layer which is only observed in aqueous media. This surface layer contains mobile ionic species which can be easily exchanged with ions from the surrounding fluids. Although the precise structure of this surface layer is still unknown, it presents very specific spectroscopic characteristics. The structure of the hydrated surface layer depends on the constitutive mineral ions: ion exchanges of HPO4 2- ions by CO3 2- ions or of Ca2+ by Mg2+ ions result in a de-structuration of the hydrated layer and modifies its spectros

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15

Puchkova, T. S., D. M. Pikhalo, and O. M. Karasyova. "PRODUCTION OF OLIGOFRUCTOSE SYRUP BY ENZYMATIC HYDROLYSIS FROM INULIN-CONTAINING CHICORY SYRUP." Food systems 3, no. 3 (2020): 20–24. http://dx.doi.org/10.21323/2618-9771-2020-3-3-20-24.

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The purpose of the work is to study the enzymatic hydrolysis of inulin-containing syrups of various purification degrees from chicory chips in the production of oligofructose to be used in dietary, diabetic and health-preventive nutrition products. It has been determined that ion exchange purification of the syrup is necessary for hydrolysis. Individual stages of ion-exchange purification are specified using a two-stage scheme: К1-А1-К2-А2 and an additional stage on the “Macronet” sorbent MN200 to stabilize pH and remove bitterness taste. Requirements for the quality of syrup for hydrolysis ha

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16

Harjula, Risto, Alan Dyer, and Rodney P. Townsend. "Ion exchange in zeolites. Part 3.—Hydrolysis and trace45Ca2+and22Na+exchanges in zeolites X and Y." J. Chem. Soc., Faraday Trans. 89, no. 6 (1993): 977–81. http://dx.doi.org/10.1039/ft9938900977.

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17

Rahimi, R. Ali, and S. K. Sadrnezhaad. "Effects of Ion-Exchange and Hydrolysis Mechanisms on Lead Silicate Glass Corrosion." CORROSION 68, no. 9 (2012): 793–800. http://dx.doi.org/10.5006/0528.

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18

Bromberg, Lev, Dmitri Muraviev, and Abraham Warshawsky. "Hydrolysis of (trimethylamine)borane with ion-exchange resins: effect of ionic surfactants." Journal of Physical Chemistry 97, no. 51 (1993): 13927–30. http://dx.doi.org/10.1021/j100153a077.

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19

Li, Ya Ping, Quan Huo, Cun Cun Zuo, Sha Sha Cao, and Er Qiang Wang. "Resin Material Used in Methyl Acrylate Hydrolysis Reaction." Advanced Materials Research 1035 (October 2014): 307–12. http://dx.doi.org/10.4028/www.scientific.net/amr.1035.307.

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In this work, the ion exchange resin catalyst named D072 were used in the hydrolysis of a methyl acrylate to acrylic acid and methanol firstlyand chemical equilibrium would be achieved during the process of the reversible reaction system. The influences of parameters such as dosage of catalyst, initial reactants molar ratio and reaction temperature were investigated. Meanwhile, the reusability of cation-exchange resin was studied, and no phenomenon of deactivation was found with using of reused catalyst. Moreover, the experimental data were analyzed by the pseudo-homogeneous (PH) model and the

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20

Kim, Je Hak, Hoseong Seo, Seung Hyun Han, et al. "Monoacyl Lipoteichoic Acid from Pneumococci Stimulates Human Cells but Not Mouse Cells." Infection and Immunity 73, no. 2 (2005): 834–40. http://dx.doi.org/10.1128/iai.73.2.834-840.2005.

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ABSTRACT We have developed a method for obtaining pneumococcal lipoteichoic acid (LTA) with none, one, or two acyl chains. Anion-exchange chromatography at pH 9.5 yields pneumococcal LTA (labeled LTA-9.5) that has a mass spectrum identical to that of pre-ion-exchange LTA and loses 500 mass units after deacylation by alkali hydrolysis. Anion exchange at pH 10.5 produces LTA (labeled LTA-10.5) with mass peaks that are 264 mass units lower than those of pre-ion-exchange LTA, and deacylation of LTA-10.5 by alkali hydrolysis reduces the mass by only 239 mass units. This result indicates that LTA-10

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21

Dargelos, M., ME Borredon, and A. Gaset. "Synthesis of Epihalohydrins by Dehydrohalogenation of Glycerol Dihalohydrins - Utilization of a Basic Ion-Exchange Resin." Australian Journal of Chemistry 45, no. 8 (1992): 1327. http://dx.doi.org/10.1071/ch9921327.

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Dehydrohalogenation of a mixture of glycerol 1,3- and 2,3-dihalohydrins by a strong basic ion-exchange resin (IRA 440 and A 26) at room temperature in an organic medium quantitatively leads to the corresponding epihalohydrin (1a; X = Cl), and (1b; X = Br) in a very short reaction time. Hydrolysis of the epihalohydrin does not occur under these conditions.

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22

Ding, Jin-Guo, Jian Fei, Da-Fu Cui, and You-Shang Zhang. "Expression of Monomeric Insulin Precursor in Pichia pastoris and Its Conversion into Monomeric B27 Lys Destripeptide Insulin by Tryptic Hydrolysis." Acta Biochimica et Biophysica Sinica 37, no. 4 (2005): 234–40. http://dx.doi.org/10.1111/j.1745-7270.2005.00040.x.

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Abstract Monomeric B27 Lys destripeptide insulin (B27 Lys DTrI) was designed and produced from its precursor expressed in Pichia pastoris through tryptic hydrolysis instead of the less efficient tryptic transpeptidation. The monomeric B27 Lys DTrI precursor (MIP) was purified from a cultured medium of P. pastoris by a combination of hydrophobic, size-exclusion, and ion-exchange chromatography. The purified MIP was converted, by tryptic hydrolysis, to B27 Lys DTrI, which was then purified by ion-exchange chromatography to homogeneity as assessed by native gel electrophoresis, HPLC, amino acid c

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23

Gutteridge, S., G. S. Reddy, and G. Lorimer. "The synthesis and purification of 2′-carboxy-d-arabinitol 1-phosphate, a natural inhibitor of ribulose 1,5-bisphosphate carboxylase, investigated by31P n.m.r." Biochemical Journal 260, no. 3 (1989): 711–16. http://dx.doi.org/10.1042/bj2600711.

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2′-Carboxy-D-arabinitol 1-phosphate (2CA1P), a natural inhibitor of ribulose 1,5-bisphosphate carboxylase was synthesized from 2′-carboxy-D-arabinitol 1,5-bisphosphate (2CABP). The selective dephosphorylation of 2CABP with either acid phosphatase or alkaline phosphatase was investigated by using 31P n.m.r. The n.m.r. spectra of the progress of the reactions indicated that both phosphatases preferentially removed the 5-phosphate from the bisphosphate. After the consumption of all of the bisphosphate, alkaline phosphatase generated a mixture of 2′-carboxy-D-arabinitol 1- and 5-monophosphates in

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24

Ou, Xiaobo, and Alexander F. Janzen. "Oxidative fluorination in the Ph2SO–XeF2–Cl− system and fluorine exchange in the Ph2S(O)F2–Ph2S(O)F+ system." Canadian Journal of Chemistry 74, no. 11 (1996): 2002–7. http://dx.doi.org/10.1139/v96-228.

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Oxidative fluorination of diphenyl sulfoxide with xenon difluoride occurs under mild conditions in the presence of chloride ion to give Ph2S(O)F2 in quantitative yield. Chloride ion appears to react with xenon difluoride to generate fluoride ion, and a mechanism of oxidative fluorination is proposed that involves anionic Ph2S(O)F− and radical Ph2S(O)F• intermediates. Addition of cationic Ph2S(O)F+ to Ph2S(O)F2 initiates rapid fluorine exchange, presumably via a symmetrical fluorine-bridged intermediate, and this exchange process was monitored by 13C and 19F NMR spectroscopy. In the presence of

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25

Gupta, Bhuvanesh, and Nishat Anjum. "Preparation of ion-exchange membranes by hydrolysis of radiation-grafted polyethylene-g-polyacrylamide membranes." Journal of Applied Polymer Science 90, no. 1 (2003): 149–54. http://dx.doi.org/10.1002/app.12612.

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26

Harjula, Risto, Jukka Lehto, Janneco H. Pothuis, Alan Dyer, and Rodney P. Townsend. "Ion exchange in zeolites. Part 2.—Hydrolysis and dissolution of zeolites NaX and NaY." J. Chem. Soc., Faraday Trans. 89, no. 6 (1993): 971–76. http://dx.doi.org/10.1039/ft9938900971.

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27

Irwin, W. J., and K. A. Belaid. "Drug-delivery by ion-exchange. Hydrolysis and rearrangement of ester pro-drugs of propranolol." International Journal of Pharmaceutics 46, no. 1-2 (1988): 57–67. http://dx.doi.org/10.1016/0378-5173(88)90010-5.

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28

Matyskin, Artem V., Paul L. Brown, and Christian Ekberg. "Weak barium and radium hydrolysis using an ion exchange method and its uncertainty assessment." Journal of Chemical Thermodynamics 128 (January 2019): 362–71. http://dx.doi.org/10.1016/j.jct.2018.08.037.

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29

Chen, Jin Hua, Asano Masaharu, and Yasunari Maekawa. "Cation and Anion Exchange Membranes Prepared by Radiation-Induced Graft Polymerization for Application in Electrodialysis." Advanced Materials Research 881-883 (January 2014): 1157–60. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1157.

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Cation and anion exchange membranes were prepared by radiation-induced graft polymerization of ethyl styrenesulfonate and chloromethyl styrene, respectively, onto poly (ethylene-alt-tetrafluoroethylene) (ETFE) films, followed by hydrolysis in the former case and quaternization in the latter case. The degree of grafting as well as the ion exchange capacity (IEC) and the conductivity of the prepared membranes were investigated. Furthermore, the cation and anion exchange membranes were tested in an electrodialysis cell using CsNO3 aqueous solution in the dilute compartment. It was found that the

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30

Rodgers, M. W., and G. P. Bolwell. "Partial purification of Golgi-bound arabinosyltransferase and two isoforms of xylosyltransferase from French bean (Phaseolus vulgaris L.)." Biochemical Journal 288, no. 3 (1992): 817–22. http://dx.doi.org/10.1042/bj2880817.

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The purification of glycosyltransferases involved in wall matrix polysaccharide synthesis has been attempted. A number of activities readily demonstrated in isolated Golgi membranes are lost following detergent solubilization. However, solubilization releases pyrophosphorylases and phosphatases that hydrolyse the substrate in enzyme assays, whether UDP-glucose, -arabinose or -xylose is used. This hydrolysis, which cannot be completely inhibited, appears to be the major factor in the apparent loss of activity. Separation of this hydrolytic activity during further purification by ion-exchange an

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31

Millward, D. Joe, Terrance Forrester, Eric Ah-Sing, et al. "The transfer of 15N from urea to lysine in the human infant." British Journal of Nutrition 83, no. 5 (2000): 505–12. http://dx.doi.org/10.1017/s0007114500000647.

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To explore the nutritional significance of urea hydrolysis for human subjects, male infants being treated for severe undernutrition were given oral doses of 10 mg [15N15N]urea every 3 h for 36 h, on admission, during rapid growth and after repletion with either moderate or generous intakes of protein. Urea hydrolysis was calculated from the 15N enrichment of urinary urea, and where possible, lysine, alanine, glycine and histidine were isolated from urine by preparative ion-exchange chromatography for measurement of 15N enrichment. Sufficient N was obtained for 15N enrichment of lysine to be me

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32

Hrubý, Martin, Viktorya Korostyatynets, Milan J. Beneš, and Zdeněk Matějka. "Bifunctional Ion Exchange Resin with Thiol and Quaternary Ammonium Groups for the Sorption of Arsenate." Collection of Czechoslovak Chemical Communications 68, no. 11 (2003): 2159–70. http://dx.doi.org/10.1135/cccc20032159.

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A bifunctional resin with thiol and quaternary ammonium groups was prepared from a macroporous strongly basic anion exchange resin of the styrene-divinylbenzene type. The key step of the synthesis is the reaction of the quaternary benzyltrimethylammonium group of the ion exchange resin with suitable sulfur-containing nucleophiles. Three synthetic routes are described: direct conversion to thiol with sodium sulfide, reaction with potassium O-ethyl dithiocarbonate followed by decomposition of the dithiocarbonate with ammonia or acid and conversion to polymeric isothiuronium salt by the reaction

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33

Ashworth, Raymond B. "Ion-Exchange Separation of Amino Acids with Postcolumn Orthophthalaldehyde Detection." Journal of AOAC INTERNATIONAL 70, no. 2 (1987): 248–52. http://dx.doi.org/10.1093/jaoac/70.2.248.

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Abstract Moore's and Stein's classical ion-exchange separation of amino acids remains the standard by which all methods are judged. The adaptation of liquid chromatography (LC) equipment to amino acid analysis was inevitable because microprocessor control of gradients allowed almost infinite variation in gradient shape, producing superior resolution with only 2 buffers. The versatility of LC equipment allowed the instruments to be used for other assays. Adaptation of orthophthalaldehyde (OPA) to amino acid analysis increased detection sensitivity to the picomole range. A method for essential a

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34

Rievaj, Miroslav, Elena Korgová, and Dušan Bustin. "Acid Hydrolysis of the Diaquacyanoethylenediamine-Nitrosylchromium Cation and Its Reactions with Mercury(II) and Silver(I) Ions." Collection of Czechoslovak Chemical Communications 58, no. 6 (1993): 1371–77. http://dx.doi.org/10.1135/cccc19931371.

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Preparation of the [Cr(H2O)2CN (en) NO]+ ion in solution by acid hydrolysis of [CrH2O(CN)2 (en) NO] including its ion exchange separation is described. The polarographic properties of [Cr(H2O)2CN (en) NO]+ as well as the kinetics of its acid hydrolysis were studied. Reactions of this complex with Hg(II) and Ag(I) were investigated and binuclear and trinuclear adducts were found to form. Linkage isomerization of the bridging cyanide in such adducts is deduced from their electrochemical properties. The spontaneous isomerization of the unstable isomer with the Cr-NC bond to the stable isomer with

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35

Agboh, Kelvin, Calvin H. F. Lau, Yvonne S. K. Khoo, et al. "Powering the ABC multidrug exporter LmrA: How nucleotides embrace the ion-motive force." Science Advances 4, no. 9 (2018): eaas9365. http://dx.doi.org/10.1126/sciadv.aas9365.

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LmrA is a bacterial ATP-binding cassette (ABC) multidrug exporter that uses metabolic energy to transport ions, cytotoxic drugs, and lipids. Voltage clamping in a Port-a-Patch was used to monitor electrical currents associated with the transport of monovalent cationic HEPES+by single-LmrA transporters and ensembles of transporters. In these experiments, one proton and one chloride ion are effluxed together with each HEPES+ion out of the inner compartment, whereas two sodium ions are transported into this compartment. Consequently, the sodium-motive force (interior negative and low) can drive t

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36

Rodríguez-López, Julio, Aloia Romaní, María J. González-Muñoz, Gil Garrote, and Juan C. Parajó. "Extracting value-added products before pulping: Hemicellulosic ethanol from Eucalyptus globulus wood." Holzforschung 66, no. 5 (2012): 591–99. http://dx.doi.org/10.1515/hf-2011-0204.

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Abstract Xylose solutions have been produced from Eucalyptus globulus wood by autohydrolysis (with hot, compressed water) and post-hydrolysis (in presence of sulfuric acid). This two-stage process led to solids enriched in cellulose and lignin (suitable as a substrate for pulping) and liquors containing xylose as the major component. The liquid phase from post-hydrolysis also contained other sugars (glucose, arabinose) and acetic acid. Neutralized liquors (as obtained, or after membrane concentration), were employed (directly or after detoxification by ion exchange) as fermentation media for t

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37

Wang, Yicheng, Jing Peng, Jiuqiang Li, and Maolin Zhai. "PVDF based ion exchange membrane prepared by radiation grafting of ethyl styrenesulfonate and sequent hydrolysis." Radiation Physics and Chemistry 130 (January 2017): 252–58. http://dx.doi.org/10.1016/j.radphyschem.2016.09.009.

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38

Fuchigami, Yoshio. "Hydrolysis of methyl acetate in distillation column packed with reactive packing of ion exchange resin." JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 23, no. 3 (1990): 354–59. http://dx.doi.org/10.1252/jcej.23.354.

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39

Zhang, Ming, Guihong Lan, Haiyan Qiu, Tailiang Zhang, Wenjing Li, and Xiuqiong Hu. "Preparation of ion exchange resin using soluble starch and acrylamide by graft polymerization and hydrolysis." Environmental Science and Pollution Research 26, no. 4 (2018): 3803–13. http://dx.doi.org/10.1007/s11356-018-3903-0.

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40

Sarkis, J. J. F., J. A. Guimarães, and J. M. C. Ribeiro. "Salivary apyrase of Rhodnius prolixus. Kinetics and purification." Biochemical Journal 233, no. 3 (1986): 885–91. http://dx.doi.org/10.1042/bj2330885.

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The salivary apyrase activity of the blood-sucking bug Rhodnius prolixus was found to reside in a true apyrase (ATP diphosphohydrolase, EC 3.6.1.5) enzyme. The crude saliva was devoid of 5′-nucleotidase, inorganic pyrophosphatase, phosphatase and adenylate kinase activities. ATP hydrolysis proceeded directly to AMP and Pi without significant accumulation of ADP. Km values for ATP and ADP hydrolysis were 229 and 291 microM respectively. Ki values for ATP and ADP inhibition of ADP and ATP hydrolysis were not different from the Km values, and these experiments indicated competitive inhibition. Ac

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41

Coolbear, Kate P., David F. Elgar, Tim Coolbear та John S. Ayers. "Comparative study of methods for the isolation and purification of bovine κ-casein and its hydrolysis by chymosin". Journal of Dairy Research 63, № 1 (1996): 61–71. http://dx.doi.org/10.1017/s002202990003154x.

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Summaryκ-Casein was purified from a single batch of whole acid casein (κ-A variant) using different methods in order to compare their merits in producing a purified material with a carbohydrate and phosphate heterogeneity representative of the whole κ-casein complement in milk. Ion-exchange methods of purification gave products of higher purity than precipitation techniques involving final purification by ethanol fractionation, but all methods resulted in κ-caseins of apparently similar heterogeneity and chemical composition. The purified κ-caseins were hydrolysed with chymosin and the derived

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42

Gupta, Bhuvanesh, and Nishat Anjum. "Preparation of ion-exchange membranes by the hydrolysis of radiation-grafted polyethylene-g-polyacrylamide films: Properties and metal-ion separation." Journal of Applied Polymer Science 90, no. 14 (2003): 3747–52. http://dx.doi.org/10.1002/app.12940.

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43

Wang, Xueqin, Huahua Yu, Ronge Xing, and Pengcheng Li. "Characterization, Preparation, and Purification of Marine Bioactive Peptides." BioMed Research International 2017 (2017): 1–16. http://dx.doi.org/10.1155/2017/9746720.

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Marine bioactive peptides, as a source of unique bioactive compounds, are the focus of current research. They exert various biological roles, some of the most crucial of which are antioxidant activity, antimicrobial activity, anticancer activity, antihypertensive activity, anti-inflammatory activity, and so forth, and specific characteristics of the bioactivities are described. This review also describes various manufacturing techniques for marine bioactive peptides using organic synthesis, microwave assisted extraction, chemical hydrolysis, and enzymes hydrolysis. Finally, purification of mar

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44

Léonil, J., та D. Mollé. "Liberation of tryptic fragments from caseinomacropeptide of bovine κ-casein involved in platelet function. Kinetic study". Biochemical Journal 271, № 1 (1990): 247–52. http://dx.doi.org/10.1042/bj2710247.

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Carbohydrate-free caseinomacropeptide (CMP) was purified from rennet-hydrolysed caseinate by trichloroacetic acid precipitation and DEAE-TSK Fractogel-650 ion-exchange chromatography. To study the liberation of 106-112, 106-116 and 113-116 fragments from carbohydrate-free CMP involved in platelet function, a quantitative study was made on the rate of hydrolysis of the three peptidic bonds that are susceptible to the action of trypsin. Data were obtained from reverse-phase (Ultrabase column) and cationic-exchange (Mono S column) h.p.l.c. On the basis of the disappearance of substrate, kcat. and

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Anderson, PA, II Creaser, C. Dean, et al. "Synthesis, Resolution and Kinetics of Electron Self-Exchange of High-Spin Manganese(II)/(III) Cage Complexes." Australian Journal of Chemistry 46, no. 4 (1993): 449. http://dx.doi.org/10.1071/ch9930449.

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The ligand sarcophagine ( sar = 3,6,10,13,16,19-hexaazabicyclo[6.6.6] icosane ) rapidly reacts with [ Mn (OH2)6]2+ to form the nearly colourless [ Mn ( sar )]2+ ion, which can readily be oxidized to the bright orange [Mn ( sar )]3+ ion (E°′+0.53 V v. n.h.e. in 0.1 mol l-1 CF3SO3H at 295 K). A single-crystal structure determination on [ Mn ( sar )](NO3)3, space group I 42d, a 15.549(6), c 19.014(6) Ǻ, R 0.051, Rw 0.049 for 608 'observed' reflections, shows the coordination geometry of the manganese(III) ion, with site symmetry 2, to be subject to a Jahn-Teller distortion, giving three pairs of

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46

Cheng, X., Y. Wang, Z. Sun, D. Sun, and A. Wang. "Pathways of phosphate uptake from aqueous solution by ZnAl layered double hydroxides." Water Science and Technology 67, no. 8 (2013): 1757–63. http://dx.doi.org/10.2166/wst.2013.049.

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ZnAl layered double hydroxides (LDHs) were prepared by urea hydrolysis-based coprecipitation for removing phosphate from aqueous solutions. The chemical formula of the product was determined as Zn5.54Al3.02(OH)8.73(CO3)0.57Cl5.66·7.84H2O. Chloride ion was the major interlayer anion of the ZnAl LDHs. Adsorption of phosphate onto the ZnAl sorbent over the entire study period was not in close agreement with pseudo-first-order or pseudo-second-order models. The adsorption can be divided into two steps. A fast adsorption was observed during the first 10 h with a marked increase in the concentration

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S., Clarkin, and Clesceri L. "Enzymatic hydrolysis and physical characterization of commercial celluloses and cellulose-based ion-exchange powdered mixed resins." Applied Microbiology and Biotechnology 60, no. 4 (2002): 485–88. http://dx.doi.org/10.1007/s00253-002-1138-x.

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Joergensen, Lars, and Helle N. Thestrup. "Determination of amino acids in biomass and protein samples by microwave hydrolysis and ion-exchange chromatography." Journal of Chromatography A 706, no. 1-2 (1995): 421–28. http://dx.doi.org/10.1016/0021-9673(94)01107-p.

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Yang, Zhennai, Eero Pahkala та Tuomo Tupasela. "Lactose hydrolysis by free and fibre-entrapped β-galactosidase from Streptococcus thermophilus". Agricultural and Food Science 2, № 5 (1993): 395–401. http://dx.doi.org/10.23986/afsci.72665.

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To study lactose hydrolysis by β-galactosidase, this enzyme was produced from Streptococcus thermophilus strain 11F and partially purified by acetone and ammonium sulphate fractionation, and ion exchange chromatography on a Q Sepharose FF column. Lactose hydrolysis by the enzyme was affected by lactose concentrations, sugars and milk proteins. The maximum extent of lactose hydrolysis in buffer was obtained with a 15% lactose concentration. Addition of 2% of lactose, glucose, galactose or sucrose in milk inhibited the enzymatic hydrolysis. The enzyme was activated by bovine serum albumin and a

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Milne, J. B. "Hexachlorotellurate(IV) hydrolysis equilibria in hydrochloric acid. Measurement by Raman and 125Te NMR spectroscopy and a reconsideration of earlier spectrophotometric results." Canadian Journal of Chemistry 69, no. 6 (1991): 987–92. http://dx.doi.org/10.1139/v91-144.

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Solutions of TeO2 (0.001 M) in HCl over a range of concentrations are shown to contain TeCl2(OH)2 in addition to TeCl62−and TeCl4(OH)−. The hydrolysis constants for TeCl62− and TeCl4(OH)− have been determined from a reconsideration of earlier UV-visible spectrophotometric results (1)[Formula: see text]The hydrolysis constants have also been determined by quantitative Raman spectroscopy (K1 = 2.21 (± 0.16) × 104 M3; K2 = 442 ± 57 M3). The agreement between K2 determined by the two methods is good but K1 from spectrophotometry is much larger than that from Raman studies. This disagreement is att

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