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Journal articles on the topic 'Phenolgy'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Murugan, P., Chinnamadasamy Kalidass, and Pratap Panda. "Zephyranthes candida (Lindl.) Herb. (Amaryllidaceae) – A new record for Odisha, India." Indian Journal of Forestry 42, no. 1 (2019): 53–54. http://dx.doi.org/10.54207/bsmps1000-2019-2h53g0.

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Zephyranthes candida (Lindl.) Herb. collected from Mahendragiri hills, Gajapati District, Odisha is reported here as a new distributional record for the state of Odisha. Brief botanical description, nomenclature, ecology and phenolgy of this taxon is provided along with photographs for easily identification.

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DÜŞEN, OLCAY, RAMAZAN SÜLEYMAN GÖKTÜRK, ERGUN KAYA, UYGAR SARPKAYA, and BETÜL GÜRCAN. "Morphological and molecular determination of a new Viola species (Violaceae) from Turkey." Phytotaxa 369, no. 1 (2018): 37. http://dx.doi.org/10.11646/phytotaxa.369.1.4.

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Viola denizliensis is described as a new species from South-West Anatolia. The species grows on serpentinite stony slopes in Bozdağ Mountain in Denizli. It belongs to Viola sect. Melanium and is close to V. dirimliensis and V. kitaibeliana. Viola denizliensis can be readily distinguished from related species by morphological and molecular characters. Comments on descriptive and diagnostic characters, distribution and ecology, phenolgy and proposed conservation status for this new species are given in the present study. Morphological affinities and ISSR-based molecular relationships between V.

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3

Kopp, Christopher, (Lipsen) Linda Jennings, Barbara Neto-Bradley, Jas Sandhar, Siena Smith, and Louisa Hsu. "Historical flowering phenology across a broad range of Pacific Northwest plants." Proceedings of TDWG 1 (August 23, 2017): e20528. https://doi.org/10.3897/tdwgproceedings.1.20528.

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For many species, understanding how climate influences the timing of seasonal life history events (phenology) is limited by the availability of long-term data. Further, long-term studies of plant phenology are often local in scale. Recent efforts to digitize herbarium collections make it possible to examine large numbers of specimens from multiple species over broad geographic regions. In the Pacific Northwest (PNW), understory plant species found in old-growth forests may be buffered against climate warming (Frey et al. 2016). Using 8,500 specimens of 40 plant species housed in 25 herbaria co

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Shi, Zhen Jing, Meng Xiang Fang, Chun Guang Zhou, Shu Rong Wang, and Zhong Yang Luo. "Studies on the Extraction of Phenols from Coal Tar Produced in Multi-Generation System." Advanced Materials Research 347-353 (October 2011): 673–77. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.673.

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Isolation of phenols from the middle oil fraction(170-230°C) of tar produced in the multi-cogeneration system has been investigated for the purpose of recovering valuable pure phenols, such as phenol, cresols, xylenol and ethyl-phenol. Phenolic compounds were separated from the middle oil by liquid-liquid extraction using alkali and sulfuric acid. The yield of phenolic fraction from the middle oil (170-230°C) is up to 37%, which is much higher compared with those of metallurgical coke plants. Chromatography-mass spectrometry was used to analyse phenolic compounds. The result shows that the phe

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Margellou, Antigoni G., Foteini F. Zormpa, Dimitrios Karfaridis, Stamatia A. Karakoulia, and Konstantinos S. Triantafyllidis. "Hydrodeoxygenation of Phenolic Compounds and Lignin Bio-Oil Surrogate Mixture over Ni/BEA Zeolite Catalyst and Investigation of Its Deactivation." Catalysts 15, no. 1 (2025): 48. https://doi.org/10.3390/catal15010048.

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Lignin is one of the main structural components of lignocellulosic biomass and can be utilized to produce phenolic compounds that can be converted downstream to cycloalkanes and aromatics, which are useful as drop-in road or aviation biofuels. Within this study, the hydrodeoxygenation of model phenolic/aromatic compounds and surrogate mixture simulating the light fraction of lignin fast-pyrolysis bio-oil was performed under mild reaction conditions. Ni/BEA zeolite was selected as a catalyst to investigate the conversion and the product selectivity of alkyl phenols (phenol, catechol, cresols),

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Salgado, Paula Rodrigues, José Laércio Favarin, Roseli Aparecida Leandro, and Oscar Fontão de Lima Filho. "Total phenol concentrations in coffee tree leaves during fruit development." Scientia Agricola 65, no. 4 (2008): 354–59. http://dx.doi.org/10.1590/s0103-90162008000400005.

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Vegetables have a natural defense against external factors synthesizing phenolic compounds, which depends on the maturity stage and on the climate. Total phenol grades were extracted from mature and young coffee leaves and were analyzed in relation to yield, phenology and climate. The climatic conditions were described by air temperature, global radiation and daily insolation. Evaluations were made on height, diameter and length of reproductive branches to determine the respective vegetative growth rates of the plants. The amounts of total phenols in the plants at the production stage was 174.

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Bannikov, Leonid, Denis Miroshnichenko, Artem Bannikov, Olexandr Borisenko, and Volodymyr Tertychnyi. "DEPHENOLIZATION OF COAL TAR HEAVY FRACTIONS: A REAGENT - FREE METHOD FOR PHENOL RECOVERY." Journal of Chemical Technology and Metallurgy 60, no. 3 (2025): 471–80. https://doi.org/10.59957/jctm.v60.i3.2025.13.

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The classical dephenolization process of the heavy fraction of coal tar involves alkaline washing to produce sodium phenolate, followed by carbon dioxide decomposition to yield crude phenols and a soda solution. The soda solution is causticized with lime, generating lime sludge contaminated with phenols - a significant environmental concern. This study explores phenol extraction technologies leveraging phenolic acidity and molecular polarity to address these limitations. A novel method for dephenolizing coal tar heavy fractions without alkali was developed, yielding wash oil suitable for captu

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8

Sui, Xin Jin, and Shu Bin Wu. "Study on Mechanism of Action of Catalysts on Liquefaction of Bagasse Alkali Lignin." Advanced Materials Research 383-390 (November 2011): 6145–50. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6145.

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Bagasse alkali lignin is the primary constituent of pulping black liquor. The phenolic products such as phenol, 2,6-dimethoxy-phenol and 2-methoxy-phenol were obtained by catalytic liquefaction from bagasse alkali lignin, with the aim of enhancing its use value. In the investigation, under optimal conditions, using SiO2-Al2O3 or FeS as catalyst, the phenols yield reached 54.10% and 55.18%, respectively. HPLC spectrum showed that the phenolic products of them were different. FT-IR and H-NMR spectrums showed that, using SiO2-Al2O3 as the catalyst, the α-O-4 and β-O-4 ether bonds and C-Cα bonds o

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9

P, Reshma, and Suganthi A. "Determination of total phenol content and preliminary phytochemical analysis in Annona reticulata Linn. Leaf extract." International Journal of Humanities and Sciences 1, no. 1 (2024): 30–34. https://doi.org/10.34256/ijohs115.

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Plant serves as the main source natural drugs and can be utilized to cure human diseases without much side effects that compared to synthetic medicines. This study is mainly aimed to find out the phytochemicals present in the leaf extract of Annona reticulata Linn. Leaf extract was prepared by three solvents acetone, ethanol and water. Maximum number of phytochemicals presence is reported in ethanolic extract and least number of phytochemicals in aqueous extract. Anthraquinone and protein present only in ethanolic extract. Phenols and flavonoids present in all solvents. Anthraquinones, flavono

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10

van Gorsel, Hendrik, and Adel A. Kader. "PHENOLIC METABOLISM AND INTERNAL BREAKDOWN (CHILLING INJURY) OF PEACH FRUIT." HortScience 25, no. 11 (1990): 1356H—1357. http://dx.doi.org/10.21273/hortsci.25.11.1356.

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Internal breakdown (IB) is the limiting factor in the storage and postharvest handling of stone fruits. The symptoms of IB appear when fruits are kept for prolonged periods at temperatures below 10C and include leatheriness, mealiness, browning and bleeding of the flesh, and failure to ripen normally. We investigated the changes in phenolic compounds associated with IB of stone fruits. Twenty-eight phenolic compounds were separated by HPLC. Ten of these components were significantly affected by chilling temperatures. The concentration of six phenols changed in response to ripening after chilli

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Balahouane, Abdelghani Mounir, Mohamed Lakhdar Belfar, Yacine Moussaoui, and Nadjib Benosmane. "Use of Polymer Inclusion Membrane for the Separation of Phenols Compounds Mixture from Dilute Aqueous Solutions." Int. J. of Membrane Science and Technology 9, no. 1 (2022): 26–32. http://dx.doi.org/10.15379/2410-1869.2022.09.01.04.

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Abstract: Separation of phenolic compounds mixture namely: phenol, resorcinol, Bisphenol A from dilute aqueous solutions by polymer inclusion membrane using Cellulose triacetate (CTA) as support was investigated as a means of recovering Bisphenol A from mixture of phenolic compounds. The effects of parameters influencing the separation performance were studied in terms of permeation flux and selectivity. For competitive transport of phenols across PIM with RC8 + NPOE, the selectivity order was Bisphenol > Phenol > Resorcinol. The high permselectivity of the membrane to Bisphenol A was pr

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Malenica, Mladenka, Magdalena Biesaga, Sandra Pedisić, and Lara Saftić Martinović. "Stability of Propolis Phenolics during Ultrasound-Assisted Extraction Procedures." Foods 13, no. 13 (2024): 2020. http://dx.doi.org/10.3390/foods13132020.

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Propolis has gained popularity in recent years as a potential preventive and therapeutic agent due to its numerous health benefits, which include immune system boosting, blood pressure lowering, allergy treatment, and skin disease treatment. The pharmacological activity of propolis is primarily attributed to phenolics and their interactions with other compounds. Given that phenols account for most of propolis’s biological activity, various extraction methods are being developed. The resin–wax composition of the propolis matrix necessitates the development of an extraction procedure capable of

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Helal, Ahmed, Stephane Desobry, Sylvie Banon, and Sherif M. Shamsia. "Antioxidant activity and bioaccessibility of phenols-enriched edible casein/caseinate coatings during in vitro digestion." Journal of Dairy Research 82, no. 1 (2014): 56–63. http://dx.doi.org/10.1017/s0022029914000557.

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Active films were developed for food coating applications. Entrapped phenol susceptibility to digestion was studied. Sodium caseinate (Na-CN) coatings were formulated with 0, 10, 20% Casein (CN) incorporating selected phenols as model antioxidants. This study investigated phenol/CN/Na-CN interactions, in vitro bioaccessibility of phenols and CN role in phenols retention during in vitro gastric and pancreatic digestion. The antioxidant activity of catechin (CAT), rutin (RUT), chlorogenic acid (CHL), gallic acid (GAL), and tannic acid (TA) in coatings varied with the phenolic compound type and C

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Mena, Pedro, Cristiana Mignogna, Nicole Tosi, et al. "Development of an Oral (Poly)Phenol Challenge Test (Opct) to Identify Aggregate Metabotypes for Dietary (Poly)Phenols and Their Drivers: A Study Protocol." Current Developments in Nutrition 6, Supplement_1 (2022): 1148. http://dx.doi.org/10.1093/cdn/nzac072.020.

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Abstract Objectives Evidence shows that bioactive (poly)phenols are pivotal in the prevention of chronic diseases, in particular in cardiometabolic health. However, the inter-individual variability existing in their bioavailability and physiological response can impact their true efficacy. Individuals showing similar metabolic profiles for specific (poly)phenols can be clustered into phenolic metabotypes, while comprehensive phenolic metabolic profiles derived from main dietary (poly)phenols could be referred to as “aggregate phenolic metabotypes”. The main aim of the study is to identify aggr

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15

Dhakshinamoorthy, Suganthagunthalam, Kahpui Mariama, Annemie Elsen, and Dirk De Waele. "Phenols and lignin are involved in the defence response of banana (Musa) plants to Radopholus similis infection." Nematology 16, no. 5 (2014): 565–76. http://dx.doi.org/10.1163/15685411-00002788.

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The role of lignin and phenols in plant defence ranges from preformed characteristic to inducible physical and chemical response against nematode infection. Our study shows the involvement of lignin and phenols in the defence of two newly identified resistant banana (Musa) genotypes to burrowing nematode Radopholus similis infection. Results were compared with reference resistant and susceptible banana cultivars. Histochemical analysis of root cross sections showed a more extensive secondary cell wall lignification of vascular bundles in R. similis-infected plants than in the nematode non-infe

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16

Jia, Yong Hui. "Technical Study on Relationship between Terpene Phenolic Compounds and Health." Advanced Materials Research 518-523 (May 2012): 529–32. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.529.

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The hydroxy derivatives of aromatic hydrocarbons which have hydroxyl getup directly attached to the ring are called phenols. Small amounts of water dissolved in phenol lower the melting point to below the room temperature. This paper summarized the bioactivities and safety issues of Terpene Phenolic, and its functions, biosynthetic mechanisms, characteristics and clearing strategies of terpene phenolic compounds.

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Sithole, Bishop B., and David T. Williams. "Halogenated Phenols in Water at Forty Canadian Potable Water Treatment Facilities." Journal of AOAC INTERNATIONAL 69, no. 5 (1986): 807–10. http://dx.doi.org/10.1093/jaoac/69.5.807.

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Abstract Samples of raw and treated water were collected once in each of 3 seasons at 40 potable water treatment plants across Canada and were analyzed for phenol and 33 halogenated phenolic compounds including chlorophenols, bromophenols, bromochlorophenols, and chloroguaiacols. Eighteen of the compounds were not found at any treatment plant; phenol and each of the remaining halogenated phenols were found in at least 1 sample. Pentachlorophenol was the only halogenated phenolic compound found in more than 20% of the raw water samples in the fall and winter samples at levels up to 53 ng/L with

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18

Mosele, Juana Ines, PELAEZ SANDRA MARTIN, Alba Macià, et al. "Faecal microbial metabolism of olive oil phenolic compounds: in vitro and in vivo approaches." Molecular Nutrition & Food Research 58, no. 9 (2014): 1809–19. https://doi.org/10.1002/mnfr.201400124.

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Scope: In the present study, the individual colonic metabolism of the main components of the virgin olive oil phenolic fraction was evaluated by an in vitro model using human faecal mi- crobiota. To assess differences in metabolism related to the molecular structure, four phenolic standards were selected, tyrosol, hydroxytyrosol, hydroxytyrosol acetate and oleuropein. After studying the in vitro colonic metabolism pathways of the individual phenols, the presence of their colonic metabolites was investigated in human faecal samples obtained before and after the sustained intake (3 weeks) of a d

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Yang, Jian Qiong, Hai Liu, Lei Peng, and Guo An Luo. "Study on Terpene Phenolic Compounds and its Health Effects." Advanced Materials Research 1004-1005 (August 2014): 924–27. http://dx.doi.org/10.4028/www.scientific.net/amr.1004-1005.924.

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Hydroxy derivatives of aromatic hydrocarbons, have hydroxyl getup directly attached to the ring, which is called phenols. This paper study the bioactivities and safety issues of Terpene Phenolic and its functions, characteristics and clearing strategies of terpene phenolic compounds, so as its biosynthetic mechanisms. The results show that the small amounts of water dissolved in phenol lower the melting point to below the room temperature.

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Arvind, Mahesh. "Biodegradation of Phenolic Pollutants." Mapana - Journal of Sciences 12, no. 4 (2013): 9–18. http://dx.doi.org/10.12723/mjs.27.2.

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Phenolic compounds are important constituents of petrochemical waste waters arising from transformation processes. Phenol together with substituted halophenols, nitrophenols and alkyl phenols are the main constituents. An Arthrobacter citreus spp. strain MSA - 2005 initially selected for growth at the expense of phenol as the sole source of carbon and energy, was enriched with phenolic compounds such as 4-nitrophenol, 4- chlorophenol and 4-methyl phenol. Metabolization of these compounds upto their maximum levels in the mineral salt medium was studied. The complete metabolization of 4-nitrophe

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B.M, Dr Khalid, and Afreen Banu. "SPECTROPHOTOMETRIC DETERMINATION OF TOTAL PHENOLIC CONTENT IN AMALAKI, ASHWAGANDHA, LAKSHMAN PHAL." Avishkara 01, no. 04 (2022): 17–20. http://dx.doi.org/10.56804/avishkara.2022.1404.

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Introduction: Amalaki, Ashwaghandha and Lakshmanphal are the three common rejuvenating drugs which has been used treatment, due to its high phenols and antioxidant activity hence study conducted the analysis total phenols content in above samples. Materials & Methods: Aims & Objectives: Estimation of total phenolic content, Study setting: ACRL Laboratory SJGAMC&H Koppal. Total phenolic content using UV Visible spectrophotometer the amounts of phenols were determined by Folin Ciocalteau reagent method, Gallic acid is used as standard and total phenols were expressed as mg/g equivale

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Sirgedaitė-Šėžienė, Vaida, Ieva Čėsnienė, Gabija Leleikaitė, Virgilijus Baliuckas, and Dorotėja Vaitiekūnaitė. "Phenolic and Antioxidant Compound Accumulation of Quercus robur Bark Diverges Based on Tree Genotype, Phenology and Extraction Method." Life 13, no. 3 (2023): 710. http://dx.doi.org/10.3390/life13030710.

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Oak bark is a rich niche for beneficial bioactive compounds. It is known that the amount of the compounds found in plant tissues can depend on species, genotype, growth site, etc., but it is unclear whether oak phenology, i.e., late or early bud burst, can also influence the amount of phenols and antioxidants that can be extracted. We tested two Quercus robur populations expressing different phenology and five half-sib families in each population to see how phenology, genotype, as well as extrahent differences (75% methanol or water) can determine the total phenol, total flavonoid content, as

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Bisaillon, Jean-Guy, François Lépine, Réjean Beaudet, and Michel Sylvestre. "Potential for carboxylation–dehydroxylation of phenolic compounds by a methanogenic consortium." Canadian Journal of Microbiology 39, no. 7 (1993): 642–48. http://dx.doi.org/10.1139/m93-093.

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An anaerobic consortium that carboxylated and dehydroxylated phenol to benzoate, and 2-cresol to 3-methylbenzoic acid, under methanogenic conditions was studied. Phenol induced this transformation activity. Addition of 4-hydroxypyridine or an increase in the concentration of proteose peptone to 0.5% (w/v) delayed the transformation. Phenol enhanced the rate of transformation of 2-cresol whereas 2-cresol delayed the transformation of phenol. Phenols with ortho-substitutions (chloro-, fluoro-, bromo-, hydroxyl-, amino-, or carboxyl-) were transformed to meta-substituted benzoic acids. However, m

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Yu, Aoxue, Rui Ouyang, Shulian Wang, Bin Ji, and Lu Cai. "Efficacy and Adaptation Mechanisms of Algal-Bacterial Granular Sludge Treatment for Phenolic Wastewater." Water 17, no. 1 (2025): 127. https://doi.org/10.3390/w17010127.

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The ubiquitous presence of phenolic compounds in effluents poses a risk to aquatic organisms and human health. This study investigates the responses of the emerging algal-bacterial granular sludge process in treating phenolic wastewater. The results showed that phenol at 1, 10, and 100 mg/L had little effect on ammonia-N, chemical oxygen demand (COD), and phosphate-P removal. At the highest phenol concentration of 100 mg/L, the average removal rates of ammonia-N, COD, and phosphate-P were 94.8%, 72.9%, and 83.7%, respectively. The presence of phenol led to a decline in chlorophyll content of t

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Sheeraz, Khan Rasheedy. "Medical use of Phenol." International Journal of Current Science Research and Review 05, no. 03 (2022): 711–18. https://doi.org/10.5281/zenodo.6363257.

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Abstract : In organic chemistry, phenols, in some cases called phenolic, are a class of substance compounds comprising of at least one hydroxyl gatherings (- OH) fortified straightforwardly to a sweet-smelling hydrocarbon bunch. The easiest is phenol, C_6 H_5 OH. Sorption of phenolic compounds is an exceptionally perplexing cycle and many variables impact it. Toward the start, definite compound construction of phenols is given its ramification for actual properties, for instance, benefits of dissolving and edges of boiling over, solvency in water, pKa and Log P. Additionally impact of enacting

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Kolosova, Olga Yu, Viktor G. Vasil’ev, Ivan A. Novikov, Elena V. Sorokina, and Vladimir I. Lozinsky. "Cryostructuring of Polymeric Systems: 67 Properties and Microstructure of Poly(Vinyl Alcohol) Cryogels Formed in the Presence of Phenol or Bis-Phenols Introduced into the Aqueous Polymeric Solutions Prior to Their Freeze–Thaw Processing." Polymers 16, no. 5 (2024): 675. http://dx.doi.org/10.3390/polym16050675.

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Poly(vinyl alcohol) (PVA) physical cryogels that contained the additives of o-, m-, and p-bis-phenols or phenol were prepared, and their physico-chemical characteristics and macroporous morphology and the solute release dynamics were evaluated. These phenolic additives caused changes in the viscosity of initial PVA solutions before their freeze–thaw processing and facilitated the growth in the rigidity of the resultant cryogels, while their heat endurance decreased. The magnitude of the effects depended on the interposition of phenolic hydroxyls in the molecules of the used additives and was s

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Ge, Tiejun, Xiaoqi Hu, Kaihong Tang, and Dongqi Wang. "The Preparation and Properties of Terephthalyl-Alcohol-Modified Phenolic Foam with High Heat Aging Resistance." Polymers 11, no. 8 (2019): 1267. http://dx.doi.org/10.3390/polym11081267.

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In this experiment, terephthalyl alcohol was used as a modifier to modify phenol under both acidic and alkaline conditions to obtain modified phenols with different molecular structures. Subsequently, the modified phenols reacted with paraformaldehyde in an alkaline environment. After foaming and curing, a modified phenolic foam with high heat aging resistance was obtained. The molecular structure was characterized via Fourier transform infrared spectrometry (FT-IR) and nuclear magnetic resonance spectroscopy (13C NMR). The results showed that two different structures of phenolic resin can be

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Xia, Lei, Hong-mei Zhang, Na Li, and Zheng-yi Jiang. "Comparative investigation on antioxidant properties of phenolic compounds in lubricants." Journal of Physics: Conference Series 2348, no. 1 (2022): 012016. http://dx.doi.org/10.1088/1742-6596/2348/1/012016.

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Antioxidant properties of several phenolic compounds in lubricants were investigated by quantum mechanical simulation. The reaction barrier of phenol, 2-tert-butylphenol and 2,6-di-tert-butylphenol with the alkoxy free radical generated by lubricants oxidation, the bond dissociation energy of O-H in them, and the energy difference from the HOMO to the LUMO of them were calculated. The reaction activity of phenoxy free radicals formed after hydrogen supply reaction was compared. The results showed that the hydrogen supply capacity of phenolic compounds decreased, while the reaction energy barri

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Sui, Xinyue, Likun Guo, Zixian Bao, Mo Xian, and Guang Zhao. "Efflux Pumps and Porins Enhance Bacterial Tolerance to Phenolic Compounds by Inhibiting Hydroxyl Radical Generation." Microorganisms 13, no. 1 (2025): 202. https://doi.org/10.3390/microorganisms13010202.

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Phenolic compounds are industrially versatile chemicals that have been successfully produced in microbial cell factories. Unfortunately, most phenolic compounds are highly toxic to cells in specific cellular environments or above a particular concentration because they form a complex with iron and promote hydroxyl radical production in Fenton reactions, resulting in the ferroptosis of cells. Here, we demonstrated that overexpression of efflux pumps and porins, including porins LamB and OmpN, and efflux pumps EmrAB, MdtABC, and SrpB, can enhance Escherichia coli phloroglucinol (PG) tolerance by

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Upadhyaya, S., E. Khatiwora, and D. K. Bora. "Estimation of total Phenol and flavonoid contents of Citrus limon L Burmf leaves from North Eastern region of India." Journal of Drug Delivery and Therapeutics 9, no. 2-s (2019): 40–42. http://dx.doi.org/10.22270/jddt.v9i2-s.2443.

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Citrus plants belonging to the family Rutaceae, are traditionally used by the local people India to treat scurvy, rheumatism, stomachic, diarrhea, liver disorders and used as an antioxidant. They are valuable source of phenolic and other biologically active compounds. Phenolic compounds have been reported to have multiple biological effects. In this paper quantitative determination of phenols and flavonoids of Citrus limon L Burmf leaves extracts was carried out using spectrophotometric methods. The plant material was collected from Assam, north eastern region of India. Total phenolic content

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Kumar, R., Y. Raizner, L. I. Kruh, et al. "Extracellular laccase production and phenolic degradation by an olive mill wastewater isolate." Grasas y Aceites 69, no. 1 (2018): 231. http://dx.doi.org/10.3989/gya.0776171.

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Olive mill wastewater (OMWW) presents a challenge to the control of effluents due to the presence of a high organic load, antimicrobial agents (monomeric-polymeric phenols, volatile acids, polyalcohols, and tannins), salinity and acidity. In this study, the production of extracellular laccase, monomeric or polymeric phenol, from an OMWW isolate based on its ability to biodegrade phenols and gallic acid as a model of phenolic compounds in OMWW was investigated. Phylogenetic analysis of the 16S RNA gene sequences identified the bacterial isolate (Acinetobacter REY) as being closest to Acinetobac

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Martín, Carlos, Helene B. Klinke, Marcelo Marcet, Luis García, Ena Hernández, and Anne Belinda Thomsen. "Study of the phenolic compounds formed during pretreatment of sugarcane bagasse by wet oxidation and steam explosion." Holzforschung 61, no. 5 (2007): 483–87. http://dx.doi.org/10.1515/hf.2007.106.

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Abstract The formation of phenolic compounds during pretreatment of sugarcane bagasse was investigated. Bagasse was pretreated by wet oxidation (WO) at 195°C during 15 min under either alkaline or acidic conditions and by steam explosion (STEX) at 205°C during 10 min. The total content of phenolic compounds in the prehydrolysates was determined spectrophotometrically. Under acidic and alkaline WO conditions, 3.8% (w/w) and 3% phenols were found, respectively. STEX gave rise to 1.9% phenols. Individual phenols were identified by GC-MS. Phenylpropanoid derivatives, such as p-coumaric and ferulic

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Arámbula-Salazar, Jorge Armando, Norma Almaraz-Abarca, José Javier Corral-Rivas, Eli Amanda Delgado-Alvarado, Raúl Díaz-Moreno, and Eusebio Montiel-Antuna. "Variability in Foliar Phenolic Composition of Several Quercus Species in Northern Mexico." Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences 58, no. 2 (2015): 79–89. http://dx.doi.org/10.52763/pjsir.phys.sci.58.2.2015.79.89.

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Quantitative and qualitative composition of the foliar phenolic compounds were investigated in 81 individual specimens of several white oak species (Quercus spp.). The trees were growing in twelve locations in Durango, Mexico. The phenol profiles were determined by HPLC-DAD and a Folin-Ciocateu procedure. The results revealed that: (i) the foliar phenol profiles of all species analysed were complex and formed by 6 to 30 compounds, (ii) the flavonols mostly quercetin glycoside, isorhamnetin glycoside, kaempferol glycoside and phenolic acids were the main identified compounds, (iii) there was a

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Negash, Negussie, Hailemichael Alemu, and Merid Tessema. "Electrochemical Characterization and Determination of Phenol and Chlorophenols by Voltammetry at Single Wall Carbon Nanotube/Poly(3,4-ethylenedioxythiophene) Modified Screen Printed Carbon Electrode." International Scholarly Research Notices 2015 (November 1, 2015): 1–11. http://dx.doi.org/10.1155/2015/459246.

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Screen printed carbon electrode (SPCE) has been modified with single wall carbon nanotube/poly(3,4-ethylenedioxythiophene) (SWCNT/PEDOT) composites for the determination of phenol and chlorophenols (phenol, 4-chlorophenol, 2,4-dichlorophenol, and 2,4,6-trichlorophenol). The effect of the modifiers on the electrode characteristics was evaluated and the responses were optimized for the voltammetric determination of phenol and chlorophenols. The parameters affecting the responses such as pH, scan rate, and stability were studied. The analytical performance of the SWCNT/PEDOT/SPCE using cyclic vol

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Lemma, Grehl, Zech, et al. "Phenolic Compounds as Unambiguous Chemical Markers for the Identification of Keystone Plant Species in the Bale Mountains, Ethiopia." Plants 8, no. 7 (2019): 228. http://dx.doi.org/10.3390/plants8070228.

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: Despite the fact that the vegetation pattern and history of the Bale Mountains in Ethiopia were reconstructed using pollen, little is known about the former extent of Erica species. The main objective of the present study is to identify unambiguous chemical proxies from plant-derived phenolic compounds to characterize Erica and other keystone species. Mild alkaline CuO oxidation has been used to extract sixteen phenolic compounds. After removal of undesired impurities, individual phenols were separated by gas chromatography and were detected by mass spectrometry. While conventional phenol ra

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Ezerskis, Z., and Z. Jusys. "Oxidation of chlorophenols on Pt electrode in alkaline solution studied by cyclic voltammetry, galvanostatic electrolysis, and gas chromatographymass spectrometry." Pure and Applied Chemistry 73, no. 12 (2001): 1929–40. http://dx.doi.org/10.1351/pac200173121929.

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Potentiodynamic investigations on a platinum electrode show that oxidation of phenol, monochlorophenols, dichlorophenols, 2,3,6-, 2,4,5-, 2,4,6-trichlorophenols, and pentachlorophenol in 1 M NaOH solution, containing 1 mM of phenols, proceeds in the potential region of Pt oxide formation. The oxidation rate of phenols decreases with the increase in the number of chlorine atoms in the benzene ring in the row: phenol > monochlorophenols > dichlorophenols > trichlorophenols > pentachlorophenol. The electrochemical stability of phenols, as studied using a cyclic voltammetry, depends on

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Barbieri, Sara, Dario Mercatante, Stefania Balzan, et al. "Improved Oxidative Stability and Sensory Quality of Beef Hamburgers Enriched with a Phenolic Extract from Olive Vegetation Water." Antioxidants 10, no. 12 (2021): 1969. http://dx.doi.org/10.3390/antiox10121969.

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This study aims at evaluating the effect of a phenol-rich extract obtained from the concentration and purification of olive mill wastewaters (added at a ratio of 87.5 and 175 mg of phenols/kg meat) on the stability and sensory quality of beef hamburgers packed under modified atmosphere and stored under alternating exposure to fluorescent light at 4 ± 2 °C for 9 days. The hamburgers were sampled at different times (0, 6, and 9 days) and grilled at 200 °C. After 9 days, more than 56% of the added phenols in the raw burgers and more than 20% the grilled ones were retained. The results show that b

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Lopretti Correa, Mary Isabel, Diego Batista-Menezes, Stephany Cunha de Rezende, Arantzazu Santamaria-Echart, Maria-Filomena Barreiro, and Jose Roberto Vega-Baudrit. "Biorefinery of Lignocellulosic and Marine Resources for Obtaining Active PVA/Chitosan/Phenol Films for Application in Intelligent Food Packaging." Polymers 17, no. 1 (2024): 82. https://doi.org/10.3390/polym17010082.

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This study focuses on the extraction of phenolic compounds from the fermentation of Phanerochaete chrysosporium and Gloeophyllum trabeum. The main goal was to synthesize phenol/chitosan microspheres and PVA films and characterized using FTIR, TGA, DSC, SEM, and mechanical tests to evaluate their physical, chemical, and mechanical properties for antimicrobial packaging applications. Homogeneous chitosan microspheres loaded with lignin-derived phenols were obtained, showing controlled release of antimicrobial compounds. The incorporation of phenolic microspheres into PVA/chitosan films resulted

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Afonso, Sandra, Maria Inês Dias, Isabel C. F. R. Ferreira, et al. "The Phenolic Composition of Hops (Humulus lupulus L.) Was Highly Influenced by Cultivar and Year and Little by Soil Liming or Foliar Spray Rich in Nutrients or Algae." Horticulturae 8, no. 5 (2022): 385. http://dx.doi.org/10.3390/horticulturae8050385.

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The interest in expanding the production of hops outside the traditional cultivation regions, mainly motivated by the growth of the craft brewery business, justifies the intensification of studies into its adaptation to local growing conditions. In this study, four field trials were undertaken on a twenty-year-old hop garden, over periods of up to three years to assess the effect of important agro-environmental variation factors on hop phenol and phenolic composition and to establish its relationship with the elemental composition of hop cones. All the field trials were arranged as factorial d

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Ortega, Maray, Raydel Manrique, Romel Jiménez, Miriam Parreño, Marcelo E. Domine, and Luis E. Arteaga-Pérez. "Secondary Amines from Catalytic Amination of Bio-Derived Phenolics over Pd/C and Rh/C: Effect of Operation Parameters." Catalysts 13, no. 4 (2023): 654. http://dx.doi.org/10.3390/catal13040654.

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The production of renewable chemicals using lignocellulosic biomass has gained significant attention in green chemistry. Among biomass-derived chemicals, secondary amines have emerged as promising intermediates for synthetic applications. Here, we report a systematic study on the reductive amination of phenolics with cyclohexylamine using Pd/C and Rh/C as catalysts. The catalytic tests were performed in batch reactors under different reaction conditions (various: amine concentration (0.1–0.4 mol/L), hydrogen pressure (0–2.5 bar), temperature (80–160 °C), and substituted phenols (phenol, o-cres

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Yang, Lei, and Hui Zhen Yan. "Modification of Reed Alkali Lignin to Adsorption of Heavy Metals." Advanced Materials Research 622-623 (December 2012): 1646–50. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.1646.

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We use reed alkali lignin to extract heavy metal adsorbent with the method of phenol modification. Then we study how the phenols addition amount, reaction temperature and reaction time affect the modified products’ adsorption of heavy metal. The results are as follows. The best adsorption of Pb2+, Cd2+, Cr3+ can be got when phenols addition amount is 4g, the reaction temperature is100°C and the reaction time is 90 min. Compared with alkali lignin, the adsorption rate gets an obvious improvement. The removal rate of Pb2+ rises from 92.4 to 97.8%. The removal rate of Cd2+ rises from 44.5 to 63.8

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Tan, Si, Wei Wang, Xv Wang, Wenfeng Li, and Xin Zhao. "Effects of two drying methods on the stability and antioxidant activity of phenolic compounds in mulberry fruits." International Food Research Journal 28, no. 1 (2021): 83–90. http://dx.doi.org/10.47836/ifrj.28.1.08.

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Mulberry is a health-promoting fruit with abundant phenolic compounds. The effects of vacuum drying (VD) and vacuum freeze-drying (VFD) on oxidation resistance and polyphenols, including extractable and non-extractable phenols, were compared in the present work. The total polyphenols and antioxidant capacity of mulberry fruits treated with VFD were higher than those treated with VD. Thirteen phenolic compounds in fresh and dried mulberry fruits were identified and quantified by UPLC-QqQ/MS. The content of extractable phenol was significantly higher than that of non-extractable phenol. In addit

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Fikó, Dezső-Róbert, Botond Ráduly, István Máthé, Tamás Felföldi, Szabolcs Lányi, and Szabolcs Szilveszter. "Bioaugmentation Potential Investigation Using a Phenol Affinity Analysis of Three Acinetobacter Strains in a Multi-Carbon-Source Condition." Water 15, no. 15 (2023): 2815. http://dx.doi.org/10.3390/w15152815.

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Bioaugmentation potential and phenol substrate affinity in a multi-carbon-source condition for three Acinetobacter strains (Acinetobacter towneri CFII-87, Acinetobacter johnsonii CFII-99A and Acinetobacter sp. CFII-98) were demonstrated. First, the phenol biodegradation ability of the strains was analyzed in batch experiments with phenol as the sole carbon source. All strains degraded phenol at 100 and 500 mg·L−1 initial concentrations; the maximum specific growth rates were 0.59 and 0.30 d−1 for A. towneri CFII-87, 0.50 and 0.20 d−1 for A. johnsonii CFII-99A, and 0.64 and 0.29 d−1 for A. sp.

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Najdi Hejazi, Sara, and Valerie Orsat. "Malting Process Effects on Antioxidant Activity of Finger Millet and Amaranth Grains." Journal of Food Research 5, no. 1 (2015): 1. http://dx.doi.org/10.5539/jfr.v5n1p1.

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Finger millet (Eleusine coracana) and amaranth (Amaranthus caudatus) are two nutritious and gluten-free grains with high contents of phenolic compounds. Phenols are known as the main source of antioxidants, with numerous health benefits. Being rich in phenol makes these grains good choices for the functional food industry. In this study, the effects of malting/germination factors, duration and temperature, on the phenolic content and antioxidant activities of these grains are thoroughly investigated and optimized. Based on a central composite design, the grains were germinated for 24, 36, and

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Thangaraj, T., A. Vinayakam, and K. Nellaiappan. "Phenol oxidase activity of a monogenean, Paramazocraes thrissocles." Journal of Helminthology 60, no. 3 (1986): 234–38. http://dx.doi.org/10.1017/s0022149x00026158.

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AbstractThe phenol oxidase of a monogenean, Paramazocraes thrissocles, oxidizes phenolic amines more effectively than other phenols studied. Based on the substrate specificity, the probable substrate for eggshell formation has been suggested. The enzyme shows the pH optimum of 7–2. At 40°C it shows maximum activity. Proenzyme is activated by metal ions and detergents. Copper chelating compounds strongly inhibit the enzyme.

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Ilavenil, K. K., A. Kasthuri, and K. Anbarasu. "OXIDATION KINETICS OF PHENOL, ITS DERIVATIVES AND SOME PARA-SUBSTITUTED PHENOL BY PYRAZINIUM CHLOROCHROMATE IN ACIDIC MEDIUM: A NON-LINEAR HAMMETT PLOTS." RASAYAN Journal of Chemistry 15, no. 03 (2022): 1660–67. http://dx.doi.org/10.31788/rjc.2022.1536920.

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In the presence of perchloric acid, the kinetics and oxidation of phenol, phenoxy acetic acid, and a few para-substituted phenols and phenoxyacetic acids by pyrazinium chlorochromate (PzCC) were investigated in acetic acid and water medium. The reaction was fractional-order for both the substrates and unit order for oxidant and acid. The products of oxidation are quinone. Comparing the reaction rate for phenols and their derivatives revealed a similar behavior. The oxidation and kinetics of phenol and its derivatives are established using the non-linear Hammett plots plot which reveal that par

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Frías-Zepeda, M. Estela, and Martha Rosales-Castro. "Effect of extraction conditions on the concentration of phenolic compounds in Mexican oregano (Lippia graveolens Kunth) residues." Revista Chapingo Serie Ciencias Forestales y del Ambiente 27, no. 3 (2021): 367–81. http://dx.doi.org/10.5154/r.rchscfa.2020.10.066.

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Introduction: Mexican oregano (Lippia graveolens Kunth) leaves are marketed for use in food and for essential oil extraction. Phenolic compounds with antioxidant properties can be obtained from the residues (leaves without oil and stems) under appropriate extraction conditions. Objective: To evaluate the effect of extraction solvent and mass/volume ratio on phenolic compounds concentration and their antioxidant capacity in oregano residues. Materials and methods: Residual leaf (without oil) and stems of oregano were used to obtain extracts with 30, 50 and 80 % aqueous ethanol (ET30, ET50, ET80

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Kalinowski, Andzrej, and Sławomir Bartkowiak. "Chromatographic analysis of phenol compounds in six natural populations of Anthyllis vulneraria (L.)." Acta Societatis Botanicorum Poloniae 48, no. 2 (2015): 205–15. http://dx.doi.org/10.5586/asbp.1979.018.

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Thin-layer chromatography was used to study the phenol composition in individual plants from six natural populations of <i>Anthyllis<i> collected from three distinct geographic regions of Poland. The results showed a variability of the phenols in the examined populations. The populations from Wielkopolska region proved to be most variable, showing the greatest number of phenols. The lowest number of the phenols studies was found in the Tatry populations. Each population showed its own particular spectrum of phenolic compounds. It was found that the populations originating from simi

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Yanty, Jannah Sofi, and I. Wayan Karta. "AKTIVITAS ANTIOKSIDAN DAN KADAR TOTAL FENOL MAKROALGA PERAIRAN TANJUNG BENOA, BALI." Meditory : The Journal of Medical Laboratory 11, no. 1 (2023): 37–44. http://dx.doi.org/10.33992/meditory.v11i1.2368.

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Purpose : The purpose of this study was to determine antioxidant activity of macroalgae in Tanjung Benoa, Bali, Method : In this research, the antioxidant activity of macroalgae in Tanjung Benoa, Bali, will be tested using the DPPH method. Total phenolic test / TPC (Total Phenolic Content) test was also carried out on macroalgae samples using the Folin-Ciocalteau method. TPC value is expressed as the equivalent of mg gallic acid (GAE)/g dry weight of the sample. Result: Samples obtained at the time of sampling were 10 macroalgae samples consisting of 5 red macroalgae (rhodophyta), 4 green macr

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Yeszhanov, A. B., and S. S. Dosmagambetova. "Phenol solutions treatment by using hydrophobized track-etched membranes." Bulletin of the Karaganda University. "Chemistry" series 99, no. 3 (2020): 99–109. http://dx.doi.org/10.31489/2020ch3/99-109.

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Phenols are one of the most common surface water pollution. The discharge of phenolic waters into water bodies and streams sharply degrade their general sanitary condition, since these compounds have a toxic effect, and phenols can intensively absorb oxygen dissolved in water, which negatively affects the life of organisms in water bodies. Therefore, water treatment of phenols is an important environmental problem. In this study, the hydrophobic polyethylene terephthalate track-etched membranes (PET TeMs) were tested in water treatment from phenol by direct contact membrane distillation (DCMD)

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