Log in

Relevant bibliographies by topics / Pyrene / Journal articles

To see the other types of publications on this topic, follow the link: Pyrene.

Journal articles on the topic 'Pyrene'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Pyrene.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Babu, Srinivasarao Arulananda, and Arup Dalal. "Pd(II)-Catalyzed Directing-Group-Aided C–H Arylation and Alkylation of Pyrene Core: Synthesis of C1,C2- and C1,C10-Disubstituted Pyrene Motifs." Synthesis 53, no. 18 (2021): 3307–24. http://dx.doi.org/10.1055/a-1472-0881.

Full text

Abstract:

AbstractWe report the application of the Pd(II)-catalyzed, directing-group-aided C–H arylation/alkylation tactics to functionalize the pyrene core, especially, the relatively inaccessible C2 and K-region C10 positions of the pyrene core and augmentation of the library of pyrene derivatives with C1,C2- and C1,C10-disubstituted pyrene motifs. The Pd(II)-catalyzed β-C–H arylation/alkylation of the C2-position of pyrene-1-carboxamide possessing an 8-aminoquinoline directing group yielded various C1,C2-disubstituted pyrenes. Similarly, the Pd(II)-catalyzed selective γ-C–H arylation/alkylation of th

APA, Harvard, Vancouver, ISO, and other styles

2

TAKEDA, FUMIOMI. "CHARACTERIZATION OF BLACKBERRY PYRENES." HortScience 28, no. 5 (1993): 488e—488. http://dx.doi.org/10.21273/hortsci.28.5.488e.

Full text

Abstract:

Pyrene (the pit of a druplet) size is a factor contributing to blackberry fruit quality. Large pyrene size, based on weight, length, or volume, and “seediness” is undesirable in processed blackberry products. Several of the recently released eastern thornless and erect Arkansas blackberries can be alternative sources of quality fruits for processors. The purpose of this study was to compare pyrenes of blackberries from the Oregon (O), Arkansas (A), and eastern USDA (E) breeding programs. Pyrene size (length) ranged from 2.5 mm in `Darrow' to 4.0 mm in `Black Satin' and `Merton Tnornless'. Pyre

APA, Harvard, Vancouver, ISO, and other styles

3

Arulananda Babu, Srinivasarao, Arup Dalal, and Subhankar Bodak. "Recent Advances in C–H Functionalization of Pyrenes." Chemistry 5, no. 4 (2023): 2713–55. http://dx.doi.org/10.3390/chemistry5040175.

Full text

Abstract:

In recent years, transition metal-catalyzed C–H activation and site-selective functionalization have been considered to be valuable synthetic tactics to functionalize organic compounds containing multiple C–H bonds. Pyrene is one of the privileged and notorious polycyclic aromatic hydrocarbons. Pyrene and its derivatives have found applications in various branches of chemical sciences, including organic chemistry, chemical biology, supramolecular sciences, and material sciences. Given the importance of pyrene derivatives, several classical methods, including the C–H functionalization method, h

APA, Harvard, Vancouver, ISO, and other styles

4

Ashley, David L., Elizabeth R. Barnhart, Donald G. Patterson, and Robert H. Hill. "Identification of Polychlorinated Pyrenes and Pyrene-Addition Products Using Proton Nuclear Magnetic Resonance Techniques." Applied Spectroscopy 41, no. 7 (1987): 1194–99. http://dx.doi.org/10.1366/0003702874447428.

Full text

Abstract:

Nuclear magnetic resonance (NMR) techniques are used to determine the chlorination pattern on a number of chlorinated pyrenes and pyrene-addition products. Determining chemical shifts, couplings, and longitudinal relaxation rates makes the unequivocal assignment of these molecules possible. Chlorination under the conditions described here were found to follow the normal orientation rules for pyrene. Spectral parameters obtained from these molecules are consistent enough to allow further application to unknown compounds. This should simplify assigning NMR spectra to other chlorinated pyrene sta

APA, Harvard, Vancouver, ISO, and other styles

5

Orehovec, Iva, Marija Matković, Isabela Pehar, Dragomira Majhen, and Ivo Piantanida. "Bis-Pyrene Photo-Switch Open- and Closed-Form Differently Bind to ds-DNA, ds-RNA and Serum Albumin and Reveal Light-Induced Bioactivity." International Journal of Molecular Sciences 22, no. 9 (2021): 4916. http://dx.doi.org/10.3390/ijms22094916.

Full text

Abstract:

Newly designed and synthesized diarylethene (DAE) derivatives with aliphatic amine sidearms and one with two pyrenes, revealed excellent photo-switching property of central DAE core in MeOH and water. The only exception was bis-pyrene analogue, its DAE core very readily photochemically closed, but reversible opening completely hampered by aromatic stacking interaction of pyrene(s) with cyclic DAE. In this process, pyrene fluorescence showed to be a reliable monitoring method, an open form characterized by strong emission at 480 nm (typical for pyrene-aggregate), while closed form emitted weakl

APA, Harvard, Vancouver, ISO, and other styles

6

Babu, B. Ravindra, Mads D. Sørensen, Patrick J. Hrdlicka, et al. "Novel nucleic acid architectures involving locked nucleic acid (LNA) and pyrene residues: Results from an Indo-Danish collaboration." Pure and Applied Chemistry 77, no. 1 (2005): 319–26. http://dx.doi.org/10.1351/pac200577010319.

Full text

Abstract:

We report herein our results for locked nucleic acid (LNA)-type oligonucleotides containing pyrene residues. Pyrene has a large hydrophobic and planar surface area and is therefore a potential intercalating unit; furthermore, it is interesting as a fluorescent tag when covalently bound to DNA. Synthesis and hybridization of conformationally locked universal base surrogates are described together with efficient interstrand communication as shown by the formation of pyrene excimer bands for duplexes containing 2'-N-(pyren-1-yl)methyl-2'-amino-LNA monomers positioned in a zipper-like manner withi

APA, Harvard, Vancouver, ISO, and other styles

7

Jasiura, Adam, Mateusz Gorzel, Konrad Warchoł, Wiktoria Lipczyńska, Wiktoria Lipczyńska, and Wiktoria Lipczyńska. "Benzo(a)pyrene - an air pollutant harmful to health in European countries." Medical Science Pulse 17, no. 3 (2023): 1–7. http://dx.doi.org/10.5604/01.3001.0053.9255.

Full text

Abstract:

Background: Benzo(a)pyrenes are organic compounds from the polycyclic aromatic hydrocarbons group known for their carcinogenic properties. Benzo(a)pyrenes are formed as a result of incomplete combustion of organic matter, such as biomass or fossil fuel.Aim of the study: To investigate whether respiratory diseases and malignant neoplasm-related deaths correlate to air concentrations of benzo(a)pyrene in European countries.Material and methods: Publicly available data were obtained regarding benzo(a)pyrene concentration from the EUROSTAT database, as well as territorial division in accordance wi

APA, Harvard, Vancouver, ISO, and other styles

8

Mimura, Yuki, Tomoki Nishikawa, Ryo Fuchino, et al. "Circularly polarised luminescence of pyrenyl di- and tri-peptides with mixed d- and l-amino acid residues." Organic & Biomolecular Chemistry 15, no. 21 (2017): 4548–53. http://dx.doi.org/10.1039/c7ob00503b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Silva, Beatriz E. Ruiz, Edward K. Koepf, Leslie D. Burtnick, and Nicholas J. Turro. "Monomer and excimer fluorescence of horse plasma gelsolin labelled with N-(1-pyrenyl)iodoacetamide." Biochemistry and Cell Biology 70, no. 7 (1992): 573–78. http://dx.doi.org/10.1139/o92-088.

Full text

Abstract:

Horse plasma gelsolin was labelled with the sulfhydryl-specific fluorescent reagent N-(1-pyrenyl)iodoacetamide. The level of incorporation of probe was 1.6 ± 0.3 mol pyrene/mol gelsolin. The circular dichroism spectrum of pyrenyl-gelsolin and its ability to interact with muscle actin were not different from that found for unmodified gelsolin. The emission from pyrenyl-gelsolin was dominated by a broad emission band centred near 483 nm, characteristic of the presence of pyrene excimers. Analysis of excitation spectra for the monomer and excimer-type fluorescence suggested that ground-state inte

APA, Harvard, Vancouver, ISO, and other styles

10

de Robillard, Guillaume, Oumayma Makni, Hélène Cattey, Jacques Andrieu, and Charles H. Devillers. "Towards sustainable synthesis of pyren-1-yl azoliums via electrochemical oxidative C–N coupling." Green Chemistry 17, no. 9 (2015): 4669–79. http://dx.doi.org/10.1039/c5gc01142f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Hill, Jonathan P., Katsuhiko Ariga, Amy Lea Schumacher, Paul A. Karr, and Francis D'Souza. "Pyren-1-ylmethyl N-substituted oxoporphyrinogens." Journal of Porphyrins and Phthalocyanines 11, no. 05 (2007): 390–96. http://dx.doi.org/10.1142/s1088424607000448.

Full text

Abstract:

5,10,15,20-tetrakis(3,5-di-tert-butyl-4-oxocyclohexadien-2,5-yl)porphyrinogen was alkylated at its macrocyclic nitrogen atoms with pyren-1-ylmethyl groups and the effect of increasing N-substitution on the spectroscopic and electrochemical properties was investigated. Both pyrene and oxoporphyrinogen chromophores exhibit fluorescence and there is little interaction between them except in the higher N-substituted compounds. Intra- or intermolecular excimer formation by pyrene is precluded by attachment to the bulky oxoporphyrinogen. Electrochemical measurements revealed reversible redox behavio

APA, Harvard, Vancouver, ISO, and other styles

12

Huang, Hong-Jui, Sonai Seenithurai, and Jeng-Da Chai. "TAO-DFT Study on the Electronic Properties of Diamond-Shaped Graphene Nanoflakes." Nanomaterials 10, no. 6 (2020): 1236. http://dx.doi.org/10.3390/nano10061236.

Full text

Abstract:

At the nanoscale, it has been rather troublesome to properly explore the properties associated with electronic systems exhibiting a radical nature using traditional electronic structure methods. Graphene nanoflakes, which are graphene nanostructures of different shapes and sizes, are typical examples. Recently, TAO-DFT (i.e., thermally-assisted-occupation density functional theory) has been formulated to tackle such challenging problems. As a result, we adopt TAO-DFT to explore the electronic properties associated with diamond-shaped graphene nanoflakes with n = 2–15 benzenoid rings fused toge

APA, Harvard, Vancouver, ISO, and other styles

13

Kim, Hyunji, A.-Rong Kim, and Jong S. Park. "Synthesis and Property of Pyrene-Naphthalene Diimide-Pyrene Triad." Textile Coloration and Finishing 26, no. 4 (2014): 305–10. http://dx.doi.org/10.5764/tcf.2014.26.4.305.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Yamaji, Minoru, Hajime Maeda, Yasuaki Nanai, and Kazuhiko Mizuno. "Substitution Effects of C-C Triple Bonds on Deactivation Processes from the Fluorescent State of Pyrene Studied by Emission and Transient Absorption Measurements." ISRN Physical Chemistry 2012 (October 14, 2012): 1–7. http://dx.doi.org/10.5402/2012/103817.

Full text

Abstract:

Pyrenes substituted with tert-butylethynyl, trimethylsilylethynyl, and trimethylsilylbutadiynyl groups were prepared, and the fluorescence yields (Φf), lifetimes, and triplet-triplet absorption were measured in cyclohexane. Upon introduction of the groups possessing triple bond(s) to the pyrene skeleton, the fluorescence rate (kf) increased. The variation of the terminating groups did not appreciably affect the Φf and kf values. Increasing the number of the triple bond, the kf values increased by the magnitude of order whereas the Φf were not varied. The effect of the ethynyl groups on the kf

APA, Harvard, Vancouver, ISO, and other styles

15

Herbstein, Frank H. "Correction of the space group of [Ni(bipy)2(ONO2)2]·2(pyrene)." Acta Crystallographica Section B Structural Science 57, no. 4 (2001): 517–19. http://dx.doi.org/10.1107/s0108768101007807.

Full text

Abstract:

The crystal structure of [Ni(bipy)2(ONO2)2]·2(pyrene), poly[[[bis(nitrato-O)nickel(II)]bis(μ-4,4′-bipyridyl-N,N′] bis(pyrene)], was originally reported in space group Pn [Biradha et al. (1999). Chem. Commun. pp. 1327–1328]. Reasons are given for changing the space group to P21/n. Consequently, incorrect descriptions of the title compound in the literature must be altered. In particular, the structure is not polar. It is further contended that description in terms of `complementary, interpenetrating covalent and noncovalent two-dimensional networks' is misleading as the `noncovalent network' (o

APA, Harvard, Vancouver, ISO, and other styles

16

Jiang, Chuang, Ling-Ling Li, and Xiao-Qi Yu. "A pyrene-based fast-responsive fluorescent probe for G-quadruplexes." Analytical Methods 9, no. 16 (2017): 2397–400. http://dx.doi.org/10.1039/c7ay00556c.

Full text

Abstract:

A novel pyrene-based fluorescent probe (3-methyl-2-(pyren-1-yl)benzo[d]thiazol-3-ium iodide) (PBT) was found to be a fast-responsive and highly selective towards G-quadruplexes. PBT exhibited an opposite fluorescent variation tendency on binding with G-quadruplexes and ds-DNAs.

APA, Harvard, Vancouver, ISO, and other styles

17

Purvia, Anita Singh, and Vinoy Kumar Shrivastava. "Impact of Benzo (a) Pyrene on Thyroid Glands and their Associated Hormones of Male Mice Mus musculus." Asian Journal of Biochemistry, Genetics and Molecular Biology 16, no. 5 (2024): 31–39. http://dx.doi.org/10.9734/ajbgmb/2024/v16i5375.

Full text

Abstract:

Benzo [a] pyrene is the main representative of polycyclic aromatic hydrocarbons, and has been repeatedly found in the air, surface water, soil, and sediments. Human exposure to Benzo [a] pyrene is therefore common. Benzo (a) pyrane (BaP) which is mainly presented in newspaper ink and inhibits the function of the thyroid and other endocrine glands of the human system, due to several disorders that occur in the human body. Healthy mature male mice Mus musculus having weight of 125 ± 5 gm were used for the experiments. The effects of a Benzo (a) pyrene (0.65mg/25g body weight/twice in a week) dur

APA, Harvard, Vancouver, ISO, and other styles

18

Liao, Junqiu, Shenglan Liu, Yongjie Yuan, and Hailiang Zhang. "Steric hindrance effect on the thermo- and photo-responsive properties of pyrene-based polymers." New Journal of Chemistry 42, no. 8 (2018): 5698–708. http://dx.doi.org/10.1039/c8nj00136g.

Full text

Abstract:

We synthesized a novel series of pyrene-based thermo- and photo-dual responsive polymers named poly(pyren-1-yl-o(m,p)-vinylbenzoate) (P(Py-o(m,p)-VB)). And the influence of the steric hindrance effect on LCST-type phase behaviors and photocleavage properties has been studied.

APA, Harvard, Vancouver, ISO, and other styles

19

Zych, Dawid, and Aneta Slodek. "The Impact of a 1,2,3-Triazole Motif on the Photophysical Behavior of Non-K Tetrasubstituted Pyrene with a Substitution Pattern Providing the Long Axial Symmetry." Molecules 27, no. 13 (2022): 4314. http://dx.doi.org/10.3390/molecules27134314.

Full text

Abstract:

1,3,6,8-Tetrasubstituted pyrene derivatives with two types of substituents (4-(2,2-dimethylpropyloxy)pyridine, 1-decyl-1,2,3-triazole, 1-benzyl-1,2,3-triazole, and pyrazole), substituted in such a way that provides the long axial symmetry, are prepared and characterized in the present study. To the best of our knowledge, the pyrene derivative containing the same heteroaryl motif (triazole) but substituted by two various alkyls, straight decyl and benzyl-based side chains (C), is reported for the first time. For comparison, compounds with one kind of triazole motif and substituted pyridine or p

APA, Harvard, Vancouver, ISO, and other styles

20

Liang, Yanna, Dale R. Gardner, Charles D. Miller, et al. "Study of Biochemical Pathways and Enzymes Involved in Pyrene Degradation by Mycobacterium sp. Strain KMS." Applied and Environmental Microbiology 72, no. 12 (2006): 7821–28. http://dx.doi.org/10.1128/aem.01274-06.

Full text

Abstract:

ABSTRACT Pyrene degradation is known in bacteria. In this study, Mycobacterium sp. strain KMS was used to study the metabolites produced during, and enzymes involved in, pyrene degradation. Several key metabolites, including pyrene-4,5-dione, cis-4,5-pyrene-dihydrodiol, phenanthrene-4,5-dicarboxylic acid, and 4-phenanthroic acid, were identified during pyrene degradation. Pyrene-4,5-dione, which accumulates as an end product in some gram-negative bacterial cultures, was further utilized and degraded by Mycobacterium sp. strain KMS. Enzymes involved in pyrene degradation by Mycobacterium sp. st

APA, Harvard, Vancouver, ISO, and other styles

21

Vila, Joaquim, and Magdalena Grifoll. "Actions of Mycobacterium sp. Strain AP1 on the Saturated- and Aromatic-Hydrocarbon Fractions of Fuel Oil in a Marine Medium." Applied and Environmental Microbiology 75, no. 19 (2009): 6232–39. http://dx.doi.org/10.1128/aem.02726-08.

Full text

Abstract:

ABSTRACT The pyrene-degrading Mycobacterium sp. strain AP1 grew in nutrient-supplemented artificial seawater with a heavy fuel oil as the sole carbon source, causing the complete removal of all linear (C12 to C40) and branched alkanes from the aliphatic fraction, as well as an extensive degradation of the three- and four-ring polycyclic aromatic hydrocarbons (PAHs) phenanthrene (95%), anthracene (80%), fluoranthene (80%), pyrene (75%), and benzo(a)anthracene (30%). Alkylated PAHs, which are more abundant in crude oils than the nonsubstituted compounds, were selectively attacked at extents that

APA, Harvard, Vancouver, ISO, and other styles

22

Heo, Yeongjae, Hyukmin Kwon, Sangwook Park, et al. "A High-Efficiency Deep Blue Emitter for OLEDs with a New Dual-Core Structure Incorporating ETL Characteristics." Molecules 28, no. 22 (2023): 7485. http://dx.doi.org/10.3390/molecules28227485.

Full text

Abstract:

In this study, we introduced the weak electron-accepting oxazole derivative 4,5-diphenyl-2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)oxazole (TPO) into both anthracene and pyrene moieties of a dual core structure. Ultimately, we developed 2-(4-(6-(anthracen-9-yl)pyren-1-yl)phenyl)-4,5-diphenyloxazole (AP-TPO) as the substitution on the second core, pyrene, and 4,5-diphenyl-2-(4-(10-(pyren-1-yl)anthracen-9-yl)phenyl)oxazole (TPO-AP) as the substitution on the first core, anthracene. Both materials exhibited maximum photoluminescence wavelengths at 433 and 443 nm in solution and emi

APA, Harvard, Vancouver, ISO, and other styles

23

Zych, Dawid. "1,3-Di(hetero)aryl-7-substituted Pyrenes—An Undiscovered Area of Important Pyrene Derivatives." Proceedings 41, no. 1 (2019): 28. http://dx.doi.org/10.3390/ecsoc-23-06470.

Full text

Abstract:

In this work, the necessity of synthesis of 1,3-di(hetero)aryl-7-substituted pyrenes is presented based on the results of theoretical calculations by using density functional theory (DFT) and time-dependent density functional theory (TD-DFT) by using Gaussian 09 program with B3LYP exchange-correlation functional and 6-31G** basis set. What is more, the synthetic routes with feasible reagents and conditions are presented. The subject of theoretical considerations are two pyrene derivatives which contain at position 1 and 3 pyrazolyl substituents and at position 7 amine (1) or boron (2) derivati

APA, Harvard, Vancouver, ISO, and other styles

24

Rubiyatno, Zee Chuang Teh, Diah Velentina Lestari, et al. "Tolerance of earthworms in soil contaminated with polycyclic aromatic hydrocarbon." Industrial and Domestic Waste Management 2, no. 1 (2022): 9–16. http://dx.doi.org/10.53623/idwm.v2i1.62.

Full text

Abstract:

Pyrene is a very resistant polycyclic aromatic hydrocarbon (PAH) with four benzene rings that survives in the environment. This study was aimed at investigating the tolerance of earthworms in soil contaminated with pyrene. The studies were performed by employing earthworms gathered from shady regions adjacent to sewage ponds as pyrene degraders to eradicate pyrene from the soil. Numerous factors affecting pyrene degradation efficiency were explored, including the effects of contaminant concentration, earthworm and soil ration, and soil condition. The highest pyrene removal (31.2%) was shown by

APA, Harvard, Vancouver, ISO, and other styles

25

Moody, Joanna D., James P. Freeman, Peter P. Fu, and Carl E. Cerniglia. "Degradation of Benzo[a]pyrene by Mycobacterium vanbaalenii PYR-1." Applied and Environmental Microbiology 70, no. 1 (2004): 340–45. http://dx.doi.org/10.1128/aem.70.1.340-345.2004.

Full text

Abstract:

ABSTRACT Metabolism of the environmental pollutant benzo[a]pyrene in the bacterium Mycobacterium vanbaalenii PYR-1 was examined. This organism initially oxidized benzo[a]pyrene with dioxygenases and monooxygenases at C-4,5, C-9,10, and C-11,12. The metabolites were separated by reversed-phase high-performance liquid chromatography (HPLC) and characterized by UV-visible, mass, nuclear magnetic resonance, and circular dichroism spectral analyses. The major intermediates of benzo[a]pyrene metabolism that had accumulated in the culture media after 96 h of incubation were cis-4,5-dihydro-4,5-dihydr

APA, Harvard, Vancouver, ISO, and other styles

26

Košćak, Marta, Isabela Pehar, Ksenija Božinović, et al. "Para-N-Methylpyridinium Pyrenes: Impact of Positive Charge on ds-DNA/RNA and Protein Recognition, Photo-Induced Bioactivity, and Intracellular Localisation." Pharmaceutics 14, no. 11 (2022): 2499. http://dx.doi.org/10.3390/pharmaceutics14112499.

Full text

Abstract:

The 2- and 2,7- substituted para-N-methylpyridinium pyrene cations show high-affinity intercalation into ds-DNAs, whereas their non-methylated analogues interacted with ds-DNA/RNA only in the protonated form (at pH 5), but not at physiological conditions (pH 7). The fluorescence from non-methylated analogues was strongly dependent on the protonation of the pyridines; consequently, they act as fluorescence ratiometric probes for simultaneous detection of both ds-DNA and BSA at pH 5, relying on the ratio between intensities at 420 nm (BSA specific) and 520 nm (DNA specific), whereby exclusively

APA, Harvard, Vancouver, ISO, and other styles

27

Sharma, Ashutosh, and Otto S. Wolfbeis. "Fiberoptic Oxygen Sensor Based on Fluorescence Quenching and Energy Transfer." Applied Spectroscopy 42, no. 6 (1988): 1009–11. http://dx.doi.org/10.1366/0003702884430470.

Full text

Abstract:

A new type of oxygen sensor is described that is based on electronic energy transfer from a donor (whose fluorescence is efficiently quenched by molecular oxygen) to an acceptor (which is less affected by oxygen). We use pyrene as the donor and perylene as the acceptor. The fluorescence emission band of the donor shows good overlap with the absorption band of the acceptor. When excited at 320 nm, the two-fluorophore system shows strong fluorescence at 476 nm, where pyrene itself is nonfluorescent. Although perylene is not efficiently quenched by oxygen, the system strongly responds to oxygen b

APA, Harvard, Vancouver, ISO, and other styles

28

Hu, Jie, Dong Zhang, and Frank W. Harris. "Ruthenium(III) Chloride Catalyzed Oxidation of Pyrene and 2,7-Disubstitued Pyrenes: An Efficient, One-Step Synthesis of Pyrene-4,5-diones and Pyrene-4,5,9,10-tetraones." Journal of Organic Chemistry 70, no. 2 (2005): 707–8. http://dx.doi.org/10.1021/jo048509q.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Jurković, Marta, Marijana Radić Stojković, Ksenija Božinović, et al. "Novel Tripodal Polyamine Tris-Pyrene: DNA/RNA Binding and Photodynamic Antiproliferative Activity." Pharmaceutics 15, no. 9 (2023): 2197. http://dx.doi.org/10.3390/pharmaceutics15092197.

Full text

Abstract:

A novel tri-pyrene polyamine (TAL3PYR) bearing net five positive charges at biorelevant conditions revealed strong intramolecular interactions in aqueous medium between pyrenes, characterised by pronounced excimer fluorescence. A novel compound revealed strong binding to ds-DNA and ds-RNA, along with pronounced thermal stabilisation of DNA/RNA and extensive changes in DNA/RNA structure, as evidenced by circular dichroism. New dye caused pronounced ds-DNA or ds-RNA condensation, which was attributed to a combination of electrostatic interactions between 5+ charge of dye and negatively charged p

APA, Harvard, Vancouver, ISO, and other styles

30

Styler, S. A., M. E. Loiseaux, and D. J. Donaldson. "Substrate effects in the photoenhanced ozonation of pyrene." Atmospheric Chemistry and Physics Discussions 10, no. 11 (2010): 27825–52. http://dx.doi.org/10.5194/acpd-10-27825-2010.

Full text

Abstract:

Abstract. We report the effects of actinic illumination on the heterogeneous ozonation kinetics of solid pyrene films and pyrene adsorbed at air-octanol and air-aqueous interfaces. Upon illumination, the ozonation of solid pyrene films and pyrene at the air-aqueous interface proceeds more quickly than in darkness; no such enhancement is observed for pyrene at the air-octanol interface. Under dark conditions, the reaction of pyrene at all three interfaces proceeds via a Langmuir-Hinshelwood-type surface mechanism. In the presence of light, Langmuir-Hinshelwood kinetics are observed for solid py

APA, Harvard, Vancouver, ISO, and other styles

31

Styler, S. A., M. E. Loiseaux, and D. J. Donaldson. "Substrate effects in the photoenhanced ozonation of pyrene." Atmospheric Chemistry and Physics 11, no. 3 (2011): 1243–53. http://dx.doi.org/10.5194/acp-11-1243-2011.

Full text

Abstract:

Abstract. We report the effects of actinic illumination on the heterogeneous ozonation kinetics of solid pyrene films and pyrene adsorbed at air-octanol and air-aqueous interfaces. Upon illumination, the ozonation of solid pyrene films and pyrene at the air-aqueous interface proceeds more quickly than in darkness; no such enhancement is observed for pyrene at the air-octanol interface. Under dark conditions, the reaction of pyrene at all three interfaces proceeds via a Langmuir-Hinshelwood-type surface mechanism. In the presence of light, Langmuir-Hinshelwood kinetics are observed for solid py

APA, Harvard, Vancouver, ISO, and other styles

32

Qutob, Mohammad, Mohd Rafatullah, Syahidah Akmal Muhammad, Abeer M. Alosaimi, Hajer S. Alorfi, and Mahmoud A. Hussein. "A Review of Pyrene Bioremediation Using Mycobacterium Strains in a Different Matrix." Fermentation 8, no. 6 (2022): 260. http://dx.doi.org/10.3390/fermentation8060260.

Full text

Abstract:

Polycyclic aromatic hydrocarbons are compounds with 2 or more benzene rings, and 16 of them have been classified as priority pollutants. Among them, pyrene has been found in higher concentrations than recommended, posing a threat to the ecosystem. Many bacterial strains have been identified as pyrene degraders. Most of them belong to Gram-positive strains such as Mycobacterium sp. and Rhodococcus sp. These strains were enriched and isolated from several sites contaminated with petroleum products, such as fuel stations. The bioremediation of pyrene via Mycobacterium strains is the main objectiv

APA, Harvard, Vancouver, ISO, and other styles

33

KUMARI, BEEMA, and RAM CHANDRA. "A Review on Bacterial Degradation of Benzo[a]pyrene and Its Impact on Environmental Health." Journal of Experimental Biology and Agricultural Sciences 10, no. 6 (2022): 1253–65. http://dx.doi.org/10.18006/2022.10(6).1253.1265.

Full text

Abstract:

Benzo[a]pyrene is a polycyclic aromatic hydrocarbon (PAH) having a high molecular weight. Benzo[a]pyrene and other PAHs are induces severe acute or chronic human health hazards and are extremely carcinogenic, mutagenic, immunotoxic, and teratogenic. Microorganisms play a crucial part in the degradation of benzo[a]pyrene from polluted environments. Such micro-organisms synthesize monooxygenase and di-oxygenase enzymes that proceed with the aerobic or anaerobic catabolic degradations of benzo[a]pyrene. Bioaugmentation, biomineralization, and biostimulation methods can be used for the decontamina

APA, Harvard, Vancouver, ISO, and other styles

34

Launen, Loren, Linda Pinto, Christine Wiebe, Eberhard Kiehlmann, and Margo Moore. "The oxidation of pyrene and benzo[a]pyrene by nonbasidiomycete soil fungi." Canadian Journal of Microbiology 41, no. 6 (1995): 477–88. http://dx.doi.org/10.1139/m95-064.

Full text

Abstract:

The purpose of this study was to determine the ability of nonbasidiomycete soil fungi to oxidize pyrene (four rings) and benzo[a]pyrene (BaP) (five rings). Fungi were isolated from five different soils in which the polycyclic aromatic hydrocarbon content ranged from 0.8 to 80 μg/g dry soil. Approximately 50% of the isolates in all sites were able to oxidize pyrene. The pyrene-oxidizing species belonged to all fungal divisions except basidiomycetes. The most common were Penicillium spp. of the subgenus Furcatum and these dominated the more contaminated soils. Penicillium janthinellum and Syncep

APA, Harvard, Vancouver, ISO, and other styles

35

Moriguchi, Tomohisa, Satomi Hida, Fumio Yoneda, and Kazuo Shinozuka. "Synthesis and Spectroscopic Properties of a Novel Bifunctional Pyrene Derivative and its Incorporation into OligoDNA." Australian Journal of Chemistry 68, no. 2 (2015): 256. http://dx.doi.org/10.1071/ch14477.

Full text

Abstract:

A new pyrene derivative bearing a modifiable silyl function (electron-donating group) and cyano function (electron-withdrawing group) was synthesized as a labelling agent for biological substances. The modified pyrene exhibited a marked bathochromic shift in both absorption and fluorescence spectra. The fluorescence quantum yield of the modified pyrene was also significantly increased compared with that of the unmodified pyrene. The modified pyrene was successfully incorporated into oligoDNA.

APA, Harvard, Vancouver, ISO, and other styles

36

Cheng, Chih-Chia, Jyun-Jie Huang, Adem Ali Muhable, et al. "Supramolecular fluorescent nanoparticles functionalized with controllable physical properties and temperature-responsive release behavior." Polymer Chemistry 8, no. 15 (2017): 2292–98. http://dx.doi.org/10.1039/c7py00276a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Kim, Seong-Jae, Jaekyeong Song, Ohgew Kweon, et al. "Functional Robustness of a Polycyclic Aromatic Hydrocarbon Metabolic Network Examined in anidAAromatic Ring-Hydroxylating Oxygenase Mutant of Mycobacterium vanbaalenii PYR-1." Applied and Environmental Microbiology 78, no. 10 (2012): 3715–23. http://dx.doi.org/10.1128/aem.07798-11.

Full text

Abstract:

ABSTRACTIn this study, we obtained over 4,000 transposon mutants ofMycobacterium vanbaaleniiPYR-1 and analyzed one of the mutants, 8F7, which appeared to lose its ability to degrade pyrene while still being able to degrade fluoranthene. This mutant was identified to be defective innidA, encoding an aromatic ring-hydroxylating oxygenase (RHO), known to be involved in the initial oxidation step of pyrene degradation. When cultured with pyrene as a sole source of polycyclic aromatic hydrocarbon (PAH), high-pressure liquid chromatography analysis revealed that thenidAmutant showed a significant de

APA, Harvard, Vancouver, ISO, and other styles

38

LAZCANO-FLORES, EDUARDO, and ALEJANDRO TORRES-MONTÚFAR. "Palicourea or Mexocarpus? Molecular phylogenetics of a Mesoamerican genus (Palicoureeae, Rubiaceae)." Phytotaxa 700, no. 2 (2025): 205–22. https://doi.org/10.11646/phytotaxa.700.2.4.

Full text

Abstract:

One of the most conflicting groups among Rubiaceae is related to Psychotria-Palicourea, which has always been a subject of debate among taxonomists due to its high number of species, its paraphyly, and its morphological variation. The genus Mexocarpus was described to encompass Palicourea tetragona due to its pyrenes with prominent ridges, atypical within the rest of Palicourea species. Mexocarpus is a genus distributed from southern Mexico to Central America, aside the pyrene morphology is characterized by the long white flowers with nocturnal anthesis and the fruits tetragonal when dry. The

APA, Harvard, Vancouver, ISO, and other styles

39

Lange, Bettina, Stefan Kremer, Heidrun Anke, and Olov Sterner. "Metabolism of pyrene by basidiomycetous fungi of the generaCrinipellis,Marasmius, andMarasmiellus." Canadian Journal of Microbiology 42, no. 11 (1996): 1179–83. http://dx.doi.org/10.1139/m96-151.

Full text

Abstract:

The ability of different species and strains of the genus Crinipellis and the related genera Marasmius and Marasmiellus to metabolize pyrene was investigated. The metabolism of pyrene and the nature of metabolites formed were strain specific and depended on the culture medium. The following metabolites of pyrene were detected in the cultures: 1-hydroxypyrene, 1-pyrenylsulfate, 1,6- and 1,8-dihydroxypyrene and the corresponding quinones, trans-4,5-dihydro-4,5-dihydroxypyrene, and two transformation products which have never before been detected, 6-hydroxypyrene-1-sulfate and pyrene-1,6-disulfat

APA, Harvard, Vancouver, ISO, and other styles

40

Stefansson, Steingrimur, Lára A. Stefansson, Suk-won Chung, Kevin Ko, Hena H. Kwon, and Saeyoung Nate Ahn. "Evaluation of Aromatic Boronic Acids as Ligands for Measuring Diabetes Markers on Carbon Nanotube Field-Effect Transistors." Journal of Nanotechnology 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/371487.

Full text

Abstract:

Biomolecular detections performed on carbon nanotube field-effect transistors (CNT-FETs) frequently use reactive pyrenes as an anchor to tether bioactive ligands to the hydrophobic nanotubes. In this paper, we explore the possibility of directly using bioactive aromatic compounds themselves as CNT-FET ligands. This would be an efficient way to functionalize CNT-FETs since many aromatic compounds bind avidly to nanotubes, and it would also ensure that ligand-binding molecules would be brought in close proximity to the nanotubes. Using a model system consisting of pyrene, phenanthrene, naphthale

APA, Harvard, Vancouver, ISO, and other styles

41

Jadhav, Sushilkumar. "Synthesis of fluorescent carboxylic acid ligands for construction of monolayers on nanostructures." Open Chemistry 10, no. 5 (2012): 1640–46. http://dx.doi.org/10.2478/s11532-012-0078-2.

Full text

Abstract:

AbstractTwo new long-chain carboxylic acids (1, 2) bearing strong fluorescent group pyrene as ligands for Self-Assembled Monolayers (SAMs) have been synthesized. The multistep targeted synthesis is accomplished by use of Pyren-1-yl methylamine hydrochloride and employing simplified synthetic protocols. Compound 2 contains a chiral center purposely introduced along the atom chain in order to make it suitable for chiro-optical studies of the resulting SAMs.

APA, Harvard, Vancouver, ISO, and other styles

42

Xiao, Hang, Tao Li, Xiao-Li Sun, et al. "Unpredicted Concentration-Dependent Sensory Properties of Pyrene-Containing NBN-Doped Polycyclic Aromatic Hydrocarbons." Molecules 27, no. 1 (2022): 327. http://dx.doi.org/10.3390/molecules27010327.

Full text

Abstract:

Pyrene molecules containing NBN-doped polycyclic aromatic hydrocarbons (PAHs) have been synthesized by a simple and efficient intermolecular dehydration reaction between 1-pyrenylboronic acid and aromatic diamine. Pyrene-B (o-phenylenediamine) with a five-membered NBN ring and pyrene-B (1,8-diaminonaphthalene) with a six-membered NBN ring show differing luminescence. Pyrene-B (o-phenylenediamine) shows concentration-dependent luminescence and enhanced emission after grinding at solid state. Pyrene-B (1,8-diaminonaphthalene) exhibits a turn-on type luminescence upon fluoride ion addition at low

APA, Harvard, Vancouver, ISO, and other styles

43

Will, A. Yvette, Arsenio Muñoz De La Peña, Thilivhali T. Ndou та Isiah M. Warner. "Influence of Triethanolamine on Aqueous β-Cyclodextrin/Pyrene Complexes". Applied Spectroscopy 49, № 4 (1995): 520–25. http://dx.doi.org/10.1366/0003702953964192.

Full text

Abstract:

The influence of triethanolamine (TEA) on the aqueous β-CD/pyrene fluorescence is examined. Collisional quenching of pyrene by TEA is indicated by Stern-Volmer plots. However, a decrease in the quenching is observed in the presence of β-cyclodextrin, which indicates an effective protection of the included pyrene molecules against quenching from TEA. A decrease in the apparent formation constant of the β-CD/pyrene complex also occurs in the presence of TEA. This phenomenon is attributed to a combination of an increased bulk solvent hydrophobicity and a competitive equilibrium between pyrene and

APA, Harvard, Vancouver, ISO, and other styles

44

Oliveira, A. S., L. F. Vieira Ferreira, J. P. Da Silva, and J. C. Moreira. "Surface photochemistry: Photodegradation study of pyrene adsorbed onto microcrystalline cellulose and silica." International Journal of Photoenergy 6, no. 4 (2004): 205–13. http://dx.doi.org/10.1155/s1110662x04000261.

Full text

Abstract:

Ground-state diffuse reflectance, time resolved laser-induced luminescence, diffuse reflectance laser flash-photolysis transient absorption and chromatographic techniques were used to elucidate the photodegradation processes of pyrene adsorbed onto microcrystalline cellulose and silica. Ground-state diffuse reflectance showed that on both substrates low concentrations display absorption of pyrene monomers. At high concentrations spectral changes attributed to aggregate formation were observed. Laser induced fluorescence showed that pyrene onto microcrystalline cellulose mainly presents fluores

APA, Harvard, Vancouver, ISO, and other styles

45

Ma, Jin-Kui, Walaa Fathy Saad Eldin, Waleed Rizk El-Ghareeb, et al. "Effects of Pyrene on Human Liver HepG2 Cells: Cytotoxicity, Oxidative Stress, and Transcriptomic Changes in Xenobiotic Metabolizing Enzymes and Inflammatory Markers with Protection Trial Using Lycopene." BioMed Research International 2019 (October 9, 2019): 1–10. http://dx.doi.org/10.1155/2019/7604851.

Full text

Abstract:

Pyrene is one of the major polycyclic aromatic hydrocarbons formed during heat treatment of meat and in car exhausts; however, few studies have investigated pyrene-induced adverse effects on human cell lines. This study aimed at the investigation of pyrene-induced cytotoxicity and oxidative damage in human liver HepG2 cells at environmentally relevant concentrations. Pyrene-induced changes in mRNA expression of xenobiotic metabolizing enzymes (XMEs), xenobiotic transporters, antioxidant enzymes, and inflammatory markers were investigated using real-time PCR. As a protection trial, the ameliora

APA, Harvard, Vancouver, ISO, and other styles

46

Kucera, Benjamin E., Robert E. Jilek, William W. Brennessel, and John E. Ellis. "Bis(pyrene)metal complexes of vanadium, niobium and titanium: isolable homoleptic pyrene complexes of transition metals." Acta Crystallographica Section C Structural Chemistry 70, no. 8 (2014): 749–53. http://dx.doi.org/10.1107/s2053229614015290.

Full text

Abstract:

Reduction of VCl3(THF)3(THF is tetrahydrofuran) and NbCl4(THF)2by alkali metal pyrene radical anion salts in THF affords the paramagnetic sandwich complexes bis[(1,2,3,3a,10a,10b-η)-pyrene]vanadium(0), [V(C16H10)2], and bis[(1,2,3,3a,10a,10b-η)-pyrene]niobium(0), [Nb(C16H10)2]. Treatment of tris(naphthalene)titanate(2−) with pyrene provides the isoelectronic titanium species, isolated as an (18-crown-6)potassium salt, namelycatena-poly[[(18-crown-6)potassium]-μ-[(1,2-η:1,2,3,3a,10a,10b-η)-pyrene]-titanate(−I)-μ-[(1,2,3,3a,10a,10b-η:6,7-η)-pyrene]], {[K(C12H24O6)][Ti(C16H10)2]}n. The first two

APA, Harvard, Vancouver, ISO, and other styles

47

Vo-Dinh, T., T. Nolan, Y. F. Cheng, M. J. Sepaniak, and J. P. Alarie. "Phase-Resolved Fiber-Optics Fluoroimmunosensor." Applied Spectroscopy 44, no. 1 (1990): 128–32. http://dx.doi.org/10.1366/0003702904085859.

Full text

Abstract:

This paper describes the development and application of a phase-resolved fiber-optics fluoroimmunosensor (PR-FIS), which combines the biochemical specificity of antigen-antibody reaction, the high sensitivity of laser excitation, the versatility of fiber-optics sensors, and the selectivity of phase-resolved detection. The PR-FIS device can differentiate benzo(a)pyrene and benzo(a)pyrene tetrol, a DNA-adduct product of the carcinogen benzo(a)pyrene. Benzo(a)pyrene tetrol can be detected at femtomole levels in the presence of an amount of interfacing benzo(a)pyrene that is 50-fold more concentra

APA, Harvard, Vancouver, ISO, and other styles

48

Cummings, Elizabeth A., Thilivhali T. Ndou, Vonda K. Smith, and Isiah M. Warner. "Spectroscopic Study of the Ternary Complex of Beta-Cyclodextrin, Pyrene, and Triton X-100." Applied Spectroscopy 47, no. 12 (1993): 2129–34. http://dx.doi.org/10.1366/0003702934066523.

Full text

Abstract:

The increased fluorescence intensity of pyrene due to indirect excitation by the nonionic surfactant Triton X-100 is discussed. Sensitization is quantitatively shown to occur in mixed solutions of pyrene, Triton X-100, and β-cyclodextrin (β-CD). A ternary complex is formed below the critical micelle concentration (CMC). Above the CMC, pyrene is displaced from the β-CD cavity. This is accompanied by a subsequent incorporation of pyrene into the interior of the micelle. Evidence is given that ternary complexation occurs among pyrene, CD, and TX-100.

APA, Harvard, Vancouver, ISO, and other styles

49

Shmal’ko, Akim V., Sergey A. Anufriev, Kyrill Yu Suponitsky, Evgeniia P. Antoshkina, Igor B. Sivaev, and Vladimir I. Bregadze. "Synthesis of B-Substituted Anthracenyl and Pyrenyl Derivatives of ortho-Carborane." Inorganics 13, no. 5 (2025): 138. https://doi.org/10.3390/inorganics13050138.

Full text

Abstract:

Isomeric B-substituted anthracenyl and pyrenyl derivatives of ortho-carborane containing polycyclic aromatic substituents both in the position of the carborane cage most distant from the carbon atoms (position 9) and in the neighboring position (position 3) were synthesized by Pd-catalyzed cross-coupling of the corresponding iodo derivatives of ortho-carborane with polycyclic aryl zinc bromides. The derivative containing two pyrenyl substituents at the positions most distant from the carbon atoms of the ortho-carborane cage, 9,12-di(pyren-1′-yl)-ortho-carborane, was obtained in a similar way s

APA, Harvard, Vancouver, ISO, and other styles

50

Babakov, V. N., N. Yu Rogovskaya, I. D. Kurdyukov, P. P. Beltyukov, S. A. Dulov, and A. S. Radilov. "EFFECT OF ARYL HYDROCARBON RECEPTOR AGONISTS AND LIPOPOLYSACCHARIDE ON BENZO(A)PYRENE GENOTOXICITY MARKERS." Toxicological Review, no. 3 (June 28, 2019): 19–25. http://dx.doi.org/10.36946/0869-7922-2019-3-19-25.

Full text

Abstract:

The effect of aryl hydrocarbon receptor agonists (FICZ and ITE), as well as lipopolysaccharide under the toxic action of benzo(a)pyrene in HepaRG human hepatoma cells was evaluated. Active forms of the key stress-activated kinase cascades and DNA repair system proteins were used as markers of the genotoxic action of benzo(a)pyrene. A mixture of lipopolysaccharide with benzo(a)pyrene increases benzo(a)pyrene cytotoxicity and reduces the activation of DNA repair system proteins below the control level. Aryl hydrocarbon receptor agonists (FICZ and ITE) exhibit a cytoprotective effect against benz

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!