Relevant bibliographies by topics / Polyphenol oxidase

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Polyphenol oxidase'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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Journal articles on the topic "Polyphenol oxidase"

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Demeke, Tigst, Craig F. Morris, Kimberly G. Campbell, Garrison E. King, James A. Anderson, and Hak-Gil Chang. "Wheat Polyphenol Oxidase." Crop Science 41, no. 6 (2001): 1750–57. http://dx.doi.org/10.2135/cropsci2001.1750.

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Arslan, Oktay, Arzu Temur, and İsrafil Tozlu. "Polyphenol Oxidase fromAlliumsp." Journal of Agricultural and Food Chemistry 45, no. 8 (1997): 2861–63. http://dx.doi.org/10.1021/jf960929w.

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AKAZAWA, TAKASHI. "Viva, polyphenol oxidase." Kagaku To Seibutsu 23, no. 10 (1985): 675–77. http://dx.doi.org/10.1271/kagakutoseibutsu1962.23.675.

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Song, Hanbit, Pyung-Gang Lee, Hyun Kim, et al. "Polyphenol-Hydroxylating Tyrosinase Activity under Acidic pH Enables Efficient Synthesis of Plant Catechols and Gallols." Microorganisms 9, no. 9 (2021): 1866. http://dx.doi.org/10.3390/microorganisms9091866.

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Tyrosinase is generally known as a melanin-forming enzyme, facilitating monooxygenation of phenols, oxidation of catechols into quinones, and finally generating biological melanin. As a homologous form of tyrosinase in plants, plant polyphenol oxidases perform the same oxidation reactions specifically toward plant polyphenols. Recent studies reported synthetic strategies for large scale preparation of hydroxylated plant polyphenols, using bacterial tyrosinases rather than plant polyphenol oxidase or other monooxygenases, by leveraging its robust monophenolase activity and broad substrate speci
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Bogdanovic, Jelena, Tanja Ducic, Nenad Milosavic, et al. "Antioxidant enzymes in the needles of different omorika lines." Archives of Biological Sciences 57, no. 4 (2005): 277–82. http://dx.doi.org/10.2298/abs0504277b.

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Picea omorika (Panc) Purkyn? (Serbian spruce) is a Balkan endemic coniferous species. We studied soluble peroxidase, catalase, polyphenol oxidase, and superoxide-dismutase activity in the needles of five omorika lines grown in a generative seed orchard. The peroxidase and polyphenol oxidase isoenzyme patterns were also investigated. Activity of the studied enzymes varied among different lines. The highest activity of peroxidase, catalase and polyphenol oxidase was found in the A3 ("borealis") and B5 ("semidichotomous") lines. Four acidic and two basic peroxidase isoenzymes and one polyphenol o
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E, Kale, and Yuzugullu Karakus Y. "Application of Aqueous Two-Phase System to the Purification of Persimmon Polyphenol Oxidase." Open Access Journal of Microbiology & Biotechnology 7, no. 3 (2022): 1–7. http://dx.doi.org/10.23880/oajmb-16000232.

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Polyphenol oxidases (PPOs), which have recently become very popular among many researchers, catalyze the oxidation of phenolic compounds. Polyphenol oxidases are generally found in plants. Among them, persimmon (Diospyros kaki L.) is known as a good source for polyphenol oxidases. In this study, the polyphenol oxidase enzyme was purified from persimmon fruit using aqueous two-phase (ATPS). The optimized system was composed of 18% (w/w) PEG4000, 7% (w/w) NaH2 P04 and 1% (w/w) NaCl (pH 8.5, 25°C and 5 g). The PPO enzyme was obtained from the system by 4.8-fold purification with 191% activity rec
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Al-Sa'ady, Ali J. R., Haider A. Hassan, Zainab W. Abdulameer, et al. "Evaluation of blue textile dye decolorization by immobilized polyphenol oxidase using pumice stone under optimum conditions." Research Journal of Chemistry and Environment 28, no. 11 (2024): 48–59. http://dx.doi.org/10.25303/2811rjce048059.

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Industrial dyes are major pollutants in wastewater and river water with an initial visible concentration of 1 mg/L. Recent studies have shown the possibility of using polyphenol oxidase in catalytic biological treatment due to its ability to oxidize a large number of dyes and pollutants in wastewater and the flexibility to work in wide ranges of temperature, pH and salinity. It is easy availability as well as the low economic cost resulting from its use in biological treatments, this enzyme polyphenol oxidase was used. The findings in this study showed that the extraction of polyphenol oxidase
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Lazarovits, G., and B. Singh. "Localization of polyphenol oxidase activity in the lamellae and membrane-bound inclusions of etiolated soybean hypocotyl chloroplasts." Canadian Journal of Botany 64, no. 8 (1986): 1675–81. http://dx.doi.org/10.1139/b86-224.

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Localization for polyphenol oxidase was carried out on 6-day-old etiolated soybean (Glycine max (L.) Merr.) tissue. Light and electron microscope observations of tissues exposed to the substrate L-dihydroxyphenylalanine after chemical fixation revealed that polyphenol oxidase activity was present in the lamellae and membrane-bound inclusions of chloroplasts. Inhibitors of polyphenol oxidase, diethyldithiocarbamate and phenylhydrazine, prevented formation of the reaction product. Only plastids in epidermal and associated cortex collenchyma cell layers contained inclusions and enzyme activity. M
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Xie, Fengying, Yuchen Lei, Xue Han, Yuying Zhao, and Shuang Zhang. "Antioxidant ability of polyphenols from black rice, buckwheat and oats: In vitro and in vivo." Czech Journal of Food Sciences 38, No. 4 (2020): 242–47. http://dx.doi.org/10.17221/248/2018-cjfs.

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Grains (black rice, buckwheat and oats) contain polyphenols and have stronger antioxidant capacity than staple foods. Their polyphenols were identified and investigated for their antioxidant capacity. The black rice and buckwheat polyphenols were mainly flavonoids; those in oats were phenolic acids. In vitro, their radical-scavenging capacities were determined as black rice > buckwheat > oats. Similarly, in vivo, the increase in total antioxidant capacities and decline in malondialdehyde indicated the enhancement of radical-scavenging and repair abilities of all polyphenol extrac
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Ölçer, Hülya, and İsmail Kocaçalışkan. "Excess Boron Reduces Polyphenol Oxidase Activities in Embryo and Endosperm of Maize Seed during Germination." Zeitschrift für Naturforschung C 62, no. 1-2 (2007): 111–15. http://dx.doi.org/10.1515/znc-2007-1-219.

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The effects of increasing concentrations of boron (0, 0.1, 1, 10 and 20 mм) as boric acid on the rate of germination and polyphenol oxidase activities in embryo and endosperm tissues of maize seeds (Zea mays L. cv. Arifiye) were studied. The germination percentage of maize seeds was not affected by boron concentrations up to 10 mм, and decreased by 20 mм. Distilled water and lower boron concentrations (0.1 and 1 mм) increased polyphenol oxidase activities at the beginning of germination up to 12 h whereas its excess levels (10 and 20 mм) decreased polyphenol oxidase activities in embryos and e
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Dissertations / Theses on the topic "Polyphenol oxidase"

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Burton, Stephanie Gail. "Biocatalytic and biomimetic studies of polyphenol oxidase." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1004088.

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Mushroom polyphenol oxidase (EC 1.14.18.1) was investigated to determine its potential for application as a biocatalyst in the synthesis of o-quinones, in organic medium. In order to determine the kinetic properties of the biocatalyst, a system was devised which comprised an immobilised polyphenol oxidase extract, functioning in chloroform. The system was hydrated by the addition of buffer. A simple method for the consistent measurement of reaction rates in this heterogenous system was designed and used to obtain detailed enzyme kinetic data relating to optimisation of reaction conditions and
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Boshoff, Aileen. "The biotransformation of phenolic pollutants using polyphenol oxidase." Thesis, Rhodes University, 2002. http://hdl.handle.net/10962/d1004035.

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The potential of using mushroom polyphenol oxidase (EC 1.14.18.1) as a biocatalyst for the biotransformation of phenols to produce catechols in an aqueous medium was investigated. Polyphenol oxidase is characterised by two distinct reactions i.e., the ortho-hydroxylation of phenols to catechols (cresolase activity) and the subsequent oxidation of catechols to orthoquinones (catecholase activity). In order to facilitate the development of a process to produce catechols, the accumulation of catechol as a true intermediate product released in the reaction system needed to be investigated, as its
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Bao, Haihong. "Biocatalysis of tyrosinase in organic solvent media using phenolic substrate models." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ50716.pdf.

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Cho, Byoung-Mi. "Purification and immobilisation of mushroom polyphenol oxidase (E.C. 1.14.18.1.)." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254958.

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Barthet, Véronique J. "Polyphenol oxidases from cassava (Manihot esculenta C.) root : extraction, purification and characterization." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34697.

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Polyphenol oxidases are important enzymes because of their role in food spoilage, oxidizing monophenols into o-diphenols and/or diphenols into the corresponding o-quinones. The resulting compounds are unstable and can rapidly form brown colored compounds, called melanins. Polyphenol oxidases, (PPOs) have been purified from several sources, particularly from fruits and vegetables. However, successful purification of PPO to homogeneity from plant sources has always been difficult.<br>The purification procedure of PPOs from cassava tuber consisted of (1) the preparation of cassava acetone powder;
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Astarci, Erhan. "Production And Biochemical Characterization Of Polyphenol Oxidase From Thermomyces Lanuginosus." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1254861/index.pdf.

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Polyphenol oxidases are enzymes that catalyze the oxidation of certain phenolic substrates to quinones in the presence of molecular oxygen. Polyphenol oxidases are widely used in several applications. In food industry, they are used for enhancement of flavor in coffee, tea and cocoa production, and determination of food quality. In medicine, they have several uses in treatments of Parkinson&rsquo<br>s disease, phenlyketonurea and leukemia. In wastewater treatment, they are used for the removal of phenolic pollutants from wastewaters. In pharmaceutical industry, differentiation of morphine from
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Gouzi, Hicham. "Extraction et caractérisation biochimique des polyphénol oxydases de champignons et leur application en biocatalyse supportée." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066668/document.

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Ce travail concerne l'extraction d'enzymes de la famille des polyphénol oxydases à partir de champignons, leur caractérisation biochimique et leur immobilisation dans des matrices solides. Ces enzymes ont tout d'abord été extraites du champignon de Paris (Agaricus bisporus) puis partiellement purifiées. Une étude de leur activité enzymatique, de leur domaine de stabilité et de leur comportement thermique a été effectuée, ainsi que l'identification d'inhibiteurs. Cette approche a été étendue à la polyphénol oxydase de la truffe de désert (Terfezia leonis Tul.). Ces deux enzymes ont ensuite été
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Ekinci, Olcun. "Immobilization Of Glucose Oxidase And Polyphenol Oxidase In Conducting Copolymer Of Pyrrole Functionalized Polystyrene With Pyrrole." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607373/index.pdf.

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Electrochemical polymerization of pyrrole functionalized polystyrene (PStPy) with pyrrole was carried out in water-sodium dodecyl sulfate solvent-electrolyte couple. Characterization of the resulting copolymer was performed via Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and four probe conductivity measurements. Glucose oxidase and polyphenol oxidase enzymes were immobilized in polypyrrole (PPy) and conducting copolymer of pyrrole functionalized polystyrene with pyrrole (P(PStPy-co-Py). Resulting enzyme electrodes were characterized by kinetic parameters<
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Fang, Caodi. "CHARACTERIZATION OF POLYPHENOL OXIDASE AND ANTIOXIDANTS FROM PAWPAW (ASIMINA TRIBOLA) FRUIT." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_theses/477.

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The latest generation of fighter aircraft utilizes a 270Vdc power system [1]. Such high voltage DC power systems are difficult to protect with conventional circuit breakers because the current does not automatically go to zero twice per cycle during a fault like it does in an AC power system and thus arcing of the contacts is a problem. Solid state power controllers (SSPCs) are the solid state equivalent of a circuit breaker that do not arc and which can respond more rapidly to a fault than a mechanical breaker [2]. Present SSPCs are limited to lower voltages and currents by the available powe
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Utami, Tyas. "Some studies on mushroom polyphenol oxidase in liquid and solid solvents." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317147.

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Books on the topic "Polyphenol oxidase"

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Patel, Usha R. Polyphenol oxidase activity assay based on fibre optics. UMIST, 1997.

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Jukanti, Aravind. Polyphenol Oxidases (PPOs) in Plants. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5747-2.

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Enzymatic Browning and Its Prevention (Acs Symposium Series). An American Chemical Society Publication, 1998.

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Laccase and Polyphenol Oxidase: Biochemistry and Biotechnological Applications. Elsevier Science & Technology, 2024.

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Leung, Ivanhoe K. H. Laccase and Polyphenol Oxidase: Biochemistry and Biotechnological Applications. Elsevier Science & Technology Books, 2024.

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Musbah, Durria Abdel Azim. Extraction and properties of Douglas-fir sapwood polyphenol oxidase. 1992.

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Luo, Yaguang. Enhanced control of enzymatic browning of apple slices by papain. 1992.

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Wehner, Michelle Renae. Effects of polyphenol oxidase and asparaginase on type 1 and P fimbrial adhesins of uropathogenic Escherichia coli. 2000.

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Jukanti, Aravind. Polyphenol Oxidases in Plants. Springer, 2017.

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Jukanti, Aravind. Polyphenol Oxidases in Plants. Springer, 2017.

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Book chapters on the topic "Polyphenol oxidase"

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Whitaker, John R. "Polyphenol Oxidase." In Food Enzymes. Springer US, 1995. http://dx.doi.org/10.1007/978-1-4757-2349-6_9.

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Steffens, John C., Eitan Harel, and Michelle D. Hunt. "Polyphenol Oxidase." In Genetic Engineering of Plant Secondary Metabolism. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2544-8_11.

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Selvarajan, E., R. Veena, and N. Manoj Kumar. "Polyphenol Oxidase, Beyond Enzyme Browning." In Microbial Bioprospecting for Sustainable Development. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0053-0_10.

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Jukanti, Aravind. "Advances in Polyphenol Oxidase (PPO) Research." In Polyphenol Oxidases (PPOs) in Plants. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5747-2_7.

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Jukanti, Aravind. "Polyphenol Oxidase(s): Importance in Food Industry." In Polyphenol Oxidases (PPOs) in Plants. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5747-2_6.

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Wakayama, T. "Polyphenol Oxidase Activity in Japanese Apples." In ACS Symposium Series. American Chemical Society, 1995. http://dx.doi.org/10.1021/bk-1995-0600.ch020.

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Baik, B. K., S. E. Ullrich, and Z. Quinde-Axtell. "Polyphenols, Polyphenol Oxidase, and Discoloration of Barley-Based Food Products." In Color Quality of Fresh and Processed Foods. American Chemical Society, 2008. http://dx.doi.org/10.1021/bk-2008-0983.ch027.

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Billaud, C., E. Regaudie, N. Fayad, Florence Richard-Forget, and Jacques Nicolas. "Effect of Cyclodextrins on Polyphenol Oxidation Catalyzed by Apple Polyphenol Oxidase." In ACS Symposium Series. American Chemical Society, 1995. http://dx.doi.org/10.1021/bk-1995-0600.ch023.

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Abram, Veronika, Marjan Donko, and Andreja Štepec. "Induction of Polyphenol Oxidase in Sempervivum L." In Plant Biotechnology and In Vitro Biology in the 21st Century. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4661-6_63.

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McEvily, A. J., R. Iyengar, and A. T. Gross. "Inhibition of Polyphenol Oxidase by Phenolic Compounds." In ACS Symposium Series. American Chemical Society, 1992. http://dx.doi.org/10.1021/bk-1992-0506.ch025.

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Conference papers on the topic "Polyphenol oxidase"

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Popovici, Lucia-Florina, and Simona Oancea. "COMPARATIVE STUDY ON PHENOLICS, FLAVONOIDS, TANNINS AND ANTIOXIDANT PROPERTIES OF CALENDULA OFFICINALIS EXTRACTS OBTAINED BY DIFFERENT EXTRACTION TECHNIQUES." In SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/6.1/s25.21.

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The aim of this study was to evaluate the influence of several extraction methods on the content of bioactive compounds of polyphenolic structure and antioxidant properties of petals from marigold flowers (Calendula officinalis). Ethanolic extracts prepared using maceration, turbo-extraction and bead-beating techniques were investigated for total phenolics, flavonoids and tannins, and antioxidant activities as measured by FRAP and DPPH assays, as well. The results showed that the highest phenolic content (1316.367 � 4.316 mg GAE/100 g DW) and antioxidant activity by FRAP (505.755 � 4.623 mg as
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Keyhani, Jacqueline, and Ezzatollah Keyhani. "Polyphenol oxidase in golden chanterelle (Cantharellus cibarius) mushroom." In Proceedings of the III International Conference on Environmental, Industrial and Applied Microbiology (BioMicroWorld2009). WORLD SCIENTIFIC, 2010. http://dx.doi.org/10.1142/9789814322119_0025.

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"Organization and evolution of the polyphenol oxidase gene family in barley." In SYSTEMS BIOLOGY AND BIOINFORMATICS. Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 2019. http://dx.doi.org/10.18699/sbb-2019-22.

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Hong-jia, Lin, Li Lin, Wang Wen-zong, Chen Ling, and Li Bing. "Effect of ultrasound in combination with food additives on polyphenol oxidase activity." In 2011 International Conference on Human Health and Biomedical Engineering (HHBE). IEEE, 2011. http://dx.doi.org/10.1109/hhbe.2011.6029004.

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Shi, Yuan, Fang Wang, and Jinghua Qi. "Browning characteristic of polyphenol oxidase in Chinese chestnut kernel (Castanea Mollissima Blume)." In International Conference on Environment and Sustainability. WIT Press, 2014. http://dx.doi.org/10.2495/ices140541.

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"Studies on latent and soluble polyphenol oxidase from Moringa oleifera Lam. Leaves." In Seventh International Conference on Humic Innovative Technologies "Humic substances and technologies for resilience" (HIT – 2022). NP CBR "Humus Sapiens", 2022. http://dx.doi.org/10.36291/hit.2022.050.

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Popovici, Ana, and Nicolae Bujoreanu. "Activitatea enzimelor antioxidante la păr în funcție de acțiunea SBA Reglalg și a microelementelor." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.72.

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According to the data obtained from the research we find that the natural growth regulator Reglalg and Reglalg in combination with trace elements have had a beneficial effect in regulating the activity of enzymes peroxidase and polyphenol oxidase which play an important role in vital processes of resistance and increased plant productivity.The redox processes in the leaves of the tardive Noiabriscaia and Socrovisce pear varieties depended on the metabolic processes in the development of plants in ontogenesis, the stages of plant development, the action of their living conditions, the amount of
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Popovici, Ana, Nicolae Bujoreanu, and Valentina Svetlicenco. "Modificarea activității peroxidazei și a polifenoloxidazei în fructele de prun în funcție de influența SBA Reglalg, microelementelor (B, Zn, Mn, Mo) și a metodelor de păstrare." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.73.

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When storaging the plum fruits of the varieties Stenley under normal atmospheric conditions and by the method of treating them with the synthetic inhibitor of ethylene Fitomag, the modification of peroxidase and polyphenol oxidase activity in fruits depended on the conditions and duration of storage, metabolic processes course in fruit during storage, the particularities of the varieties and their storage methods. The gradual decrease in peroxidase activity and the increase in polyphenol oxidase activity occurred in the case of fruit preservation by both methods. In the fruits storaged by the
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Valmas, Alexandros, Maria Dimarogona, and Grigorios Dedes. "Structural studies of a fungal polyphenol oxidase with application to bioremediation of contaminated water." In 1st International Electronic Conference on Microbiology. MDPI, 2020. http://dx.doi.org/10.3390/ecm2020-07114.

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Barreto, Andres Felipe Moreno, Giuseppe Vignali, and Luca Sandei. "Effect of High Pressure Processing on enzymatic activity for strawberries, sour cherries and red grapes." In the 7th International Food Operations and Processing Simulation Workshop. CAL-TEK srl, 2021. http://dx.doi.org/10.46354/i3m.2021.foodops.004.

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Color degradation is an important factor that affect the quality and acceptability of fruit juices and purees; several enzymes, as well as the microbial endogenous population are not only responsible for this phenomenon but for changes in flavor and texture. Traditional stabilization methods have been used to preserve these kind of products; however, there is a negative impact on vitamins and bioactive compounds composition. High Pressure Processing (HPP) is a non-thermal alternative that has been applied for the extension of shelf life of fresh products, reducing the adverse effects of classi
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Reports on the topic "Polyphenol oxidase"

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Steffens, John, Eithan Harel, and Alfred Mayer. Coding, Expression, Targeting, Import and Processing of Distinct Polyphenoloxidases in Tissues of Higher Plants. United States Department of Agriculture, 1994. http://dx.doi.org/10.32747/1994.7613008.bard.

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Polyphenol oxidase (PPO) catalyzes the oxidation of phenols to quinones at the expense of O2. PPOs are ubiquitous in higer plants, and their role in oxidative browning of plant tissues causes large annual losses to food production. Despite the importance of PPOs to agriculture, the function(s) of PPOs in higher plants are not understood. Among other roles, PPOs have been proposed to participate in aspects of chloroplast metabolism, based on their occurrence in plastids and high Km for O2. Due to the ability of PPO to catalyze formation of highly reactive quinones, PPOs have also been proposed
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Prusky, Dov, Lisa Vaillancourt, and Robert Fluhr. Host Ammonification by Postharvest Pathogens and its Contribution to Fungal Colonization and Symptom Development. United States Department of Agriculture, 2006. http://dx.doi.org/10.32747/2006.7592640.bard.

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Postharvest decay of fruits and vegetables caused by pathogenic and saprophytic fungi significantly impairs the quality and quantity of fresh produce brought to market. Consequently, there is considerable interest in identifying factors that determine the susceptibility of these commodities to pathogen infection. Insidious postharvest decays remain quiescent during fruit growth and harvest, but activate during the postharvest period. A key response to the physiological changes occurring during fruit ripening is the initiation of ammonium secretion by the pathogen. Ammonium ions at the infectio
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Steffens, John C., and Eithan Harel. Polyphenol Oxidases- Expression, Assembly and Function. United States Department of Agriculture, 1995. http://dx.doi.org/10.32747/1995.7571358.bard.

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Polyphenol oxidases (PPOs) participate in the preparation of many plant products on the one hand and cause considerable losses during processing of plant products on the other hand. However, the physiological functions of plant PPO were still a subject of controversy at the onset of the project. Preliminary observations that suggested involvement of PPOs in resistance to herbivores and pathogens held great promise for application in agriculture but required elucidation of PPO's function if modulation of PPO expression is to be considered for improving plant protection or storage and processing
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