Log in

Relevant bibliographies by topics / Naphthalene Properties / Journal articles

Journal articles on the topic 'Naphthalene Properties'

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

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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 'Naphthalene Properties.'

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

El-Dossoki, Farid I. "Protonation and Solvation Thermodynamics of Some Naphthol Derivatives in KCl Aqueous Solution of Different Ionic Strengths." Journal of Chemistry 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/7234320.

Full text

Abstract:

The acid-base properties of naphthalen-1-ol (L1), naphthalene-1,5-diol (L2), and 4-amino-3-hydroxynaphthalene-1-sulphonic acid (L3) were characterized from pH-metric measurements in pure water and in different concentrations (0–4 mol kg−1) of aqueous KCl solutions at the temperature range ofT= (293.15 to 213.15) K at 5 K intervals. The results reveal that naphthalen-1-ol and naphthalene-1,5-diol molecules have two ionisable protons (of the hydroxyl groups) while 4-amino-3-hydroxynaphthalene-1-sulphonic acid has three ionisable protons (hydrogen ion of the hydroxyl group, SO3H, andNH3+). Modeling of the data was done by applying Debye-Hückel model. The protonation and the solvation processes of all studied ligands are spontaneous and endothermic processes. Also the solubilities of naphthalen-1-ol, naphthalene-1,5-diol, and 4-amino-3-hydroxynaphthalene-1-sulphonic acid were determined. The data were analyzed using Setschenow equation and the values of Setschenow coefficients (km) were determined. From the solubility data, the activity coefficients were obtained. The values of the total solubilities (ST) for naphthalen-1-ol and naphthalene-1,5-diol were found equal to the values of their neutral species (S0). On the other hand, the total solubility for 4-amino-3-hydroxynaphthalene-1-sulphonic acid is different from that of its neutral species. The results also indicate solubility decrease in pure water from L1-L2-L3.

APA, Harvard, Vancouver, ISO, and other styles

2

Zhu, Jian Qing, Wei Wang, and Hui Ying Xu. "QSPR Models for the Physicochemical Properties of Polychlorinated Naphthalene Congeners." Advanced Materials Research 726-731 (August 2013): 440–43. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.440.

Full text

Abstract:

Based on quantitative structureproperty relationship (QSPR) of organic compounds, geometrical optimization and quantum chemical parameter calculations have been performed at the B3LYP/6-31G* level of theory for 75 polychlorinated naphthalenes (PCNs). A number of statistically-based parameters have been obtained. Relationship between the physicochemical properties of polychlorinated naphthalene compounds (n-octanol/air partition coefficient, sub-cooled liquid vapor pressure, water solubility) and the structural descriptors have been established by multiple linear regression (MLR) method. The results show that the molecular volume (Vmc), dipolar moment (μ), and the energy of lowest unoccupied molecular orbital (ELUMO), together with the quantity derived from electrostatic potential () can be well used to express the quantitative structure-property relationships of polychlorinated naphthalene compounds. The models constructed have good robustness and high predictive capability.

APA, Harvard, Vancouver, ISO, and other styles

3

Bedi, Anjan, Linda J. W. Shimon, Benny Bogoslavsky, and Ori Gidron. "Easier to Twist than Bend: The Scope of the Bridge Formation Approach to Naphthalenophane Synthesis." Organic Materials 02, no. 04 (October 2020): 323–29. http://dx.doi.org/10.1055/s-0040-1721102.

Full text

Abstract:

Twisting anthracene and higher acenes can alter their optical, magnetic, and electronic properties. To test the effect of twisting on the lower homologue, naphthalene, we synthesized tethered naphthalenophanes bearing alkyl bridges. Both X-ray structure and DFT calculations show that hexyl and butyl bridges induce a 6° and 12° end-to-end twist on the naphthalene unit, respectively. Attempts to increase the twisting further using shorter tethers resulted in an elimination product. Enantiomerically pure naphthalenophanes display strong chiroptical properties, which intensify with increasing twist. Attempts to induce bending, rather than twisting, using the same synthetic methodology, resulted in intermolecular dimerization, yielding macrocyclic naphthalenes. This work highlights the importance of steric hindrance in the synthesis of curved cyclophanes using the bridge formation approach.

APA, Harvard, Vancouver, ISO, and other styles

4

Srivastava, Umesh Chandra, and Shyamendra Pratap Singh. "Structural and Vibrational Properties of Solid Naphthalene (C10H8) by Use of VTBFS Model." Oriental Journal Of Chemistry 38, no. 3 (June 30, 2022): 762–65. http://dx.doi.org/10.13005/ojc/380329.

Full text

Abstract:

In this article author’s are reporting lattice dynamical properties of naphthalene (C10H8) by use of VTBFS model. we also report the combined density of states (CDS), dispersion relation and elastic properties of naphthalene. So, use of the present model the lattice property of naphthalene is reported successfully. Moreover, within our reported result the lattice modes exhibit more drastic changes in the structural and vibrational properties of naphthalene.

APA, Harvard, Vancouver, ISO, and other styles

5

Choi, Don-Soo, Mu-Young Kim, and Kyung-Woo Hyung. "Electrochemical and Spectrum Properties of 2,7-Naphthalene Ligand Compounds." Korean Journal of Materials Research 19, no. 9 (September 27, 2009): 510–15. http://dx.doi.org/10.3740/mrsk.2009.19.9.510.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Dos Santos, Andre, Marcos Dias, and David Antonelli. "Combustion Properties of Several Species of WoodCombustion Properties of Several Species of Wood." Chemistry & Chemical Technology 3, no. 3 (September 15, 2009): 177–82. http://dx.doi.org/10.23939/chcht03.03.177.

Full text

Abstract:

Mesoporous niobium oxide (Nb2O5) was synthesized and treated with naphthalene sulfonated formaldehyde resin (NSF) solution. These new inorganic-organic hybrid composites were characterized by different techniques. Results indicated that the pores of the nanostructured material are filled with the NSF resin with changes in the morphology and thermal properties of the mesoporous Nb2O5

APA, Harvard, Vancouver, ISO, and other styles

7

Boinski, T., A. Cieszkowski, B. Rosa, B. Leśniewska, and A. Szumna. "Calixarenes with naphthalene units: calix[4]naphthalenes and hybrid[4]arenes." New Journal of Chemistry 40, no. 10 (2016): 8892–96. http://dx.doi.org/10.1039/c6nj01736c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Wei, Sha Sha, Ren Jie Wang, and Gang Liu. "Synthesizes and Properties of a New Unsymmetrical Diarylethene with a Naphthalene Moiety." Advanced Materials Research 788 (September 2013): 219–22. http://dx.doi.org/10.4028/www.scientific.net/amr.788.219.

Full text

Abstract:

An unsymmetrical diarylethene with a naphthalene moiety was synthesized. The naphthalene was connected directly to the central perfluorocyclopentene ring as an aryl moiety and available to participate in photoisomerization reaction. This compound exhibited reversible photochromism, changing from colorless to SandyBrown after irradiation with UV light both in solution and in poly-methyl methacrylate (PMMA) amorphous film. Also, it exhibited remarkable fluorescence switching in the solid state. The electron-withdrawing substituents evidently enhanced the some propeties of diarylethenes with a naphthalene moiety. All results indicated that the naphthalene played an important role during the process of photochromic reaction for the diarylethene derivatives.

APA, Harvard, Vancouver, ISO, and other styles

9

Miroshnichenko, E. A., T. S. Kon’kova, Yu N. Matyushin, A. B. Vorob’ev, J. O. Inozemtsev, and A. V. Inozemtsev. "The Thermochemical Properties of Naphthalene Derivatives." Russian Journal of Physical Chemistry B 16, no. 2 (April 2022): 207–10. http://dx.doi.org/10.1134/s1990793122020191.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Voloshchuk, Roman, Mariusz Tasior, Adina I. Ciuciu, Lucia Flamigni, and Daniel T. Gryko. "Corrole–imide dyads — Synthesis and optical properties." Journal of Porphyrins and Phthalocyanines 19, no. 01-03 (January 2015): 479–91. http://dx.doi.org/10.1142/s1088424615500339.

Full text

Abstract:

Two rarely seen building blocks have been incorporated into light absorbing arrays: corroles and 2,3-naphthalimides. General synthetic strategy consisting in direct condensation of formyl substituted aromatic imides with dipyrranes led to diverse range of trans-A2B-corroles in acceptable yields. Spectroscopic properties of all five dyads studied suggest that regardless the imide's structure, components are weakly electronically coupled. Positioning 2,3-naphthalimide unit partially above the corrole core leads to slight alteration of their optical properties. Dyads bearing blue-absorbing imide components display different behavior depending on their structure. In corrole linked with naphthalenyl-naphthalene-1,8-carboximide a 100% effective energy transfer reaction from the imide component to the corrole component occurred. On the contrary, in small, strongly polarized amino-cyano-phthalimide neither efficient energy-nor electron-transfer could be detected and excitation leads to fluorescence from both components.

APA, Harvard, Vancouver, ISO, and other styles

11

Kumar, Vipin B., Cassandra L. Fleming, Sai Shruthi Murali, Paul A. Hume, Nathaniel J. L. K. Davis, Tilo Söhnel, and Erin M. Leitao. "The photophysical properties of naphthalene bridged disilanes." RSC Advances 11, no. 35 (2021): 21343–50. http://dx.doi.org/10.1039/d1ra02961d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Ichino, Rina, Atsuya Momotake, and Tatsuo Arai. "Photochemical properties of enediyne-cored dendrimers bearing naphthalenes at the periphery." Canadian Journal of Chemistry 97, no. 2 (February 2019): 112–19. http://dx.doi.org/10.1139/cjc-2018-0128.

Full text

Abstract:

A novel series of trans and cis enediyne-cored dendrimers bearing naphthalenes at the periphery were synthesized and their photochemical properties were examined. The trans/cis isomer ratio in the photostationary state was dependent on the excitation site in the dendrimers. When the enediyne core was selectively excited, the trans/cis isomer ratio in the photostationary state was either around 50/50 or a cis-rich mixture in all dendrimers due to the larger molar extinction coefficient of the trans-enediynes. On the other hand, when naphthalene was excited, a trans-rich mixture was unexpectedly obtained in higher generation dendrimers even though the energy transfer efficiency was almost quantitative in the trans dendrimers. These results could be explained by the energy transfer process, which was different depending on the geometric isomerism of the enediyne core.

APA, Harvard, Vancouver, ISO, and other styles

13

Lasitha, P., and Edamana Prasad. "Orange red emitting naphthalene diimide derivative containing dendritic wedges: aggregation induced emission (AIE) and detection of picric acid (PA)." RSC Advances 5, no. 52 (2015): 41420–27. http://dx.doi.org/10.1039/c5ra04857e.

Full text

Abstract:

Herein we report the synthesis, characterization and photophysical properties of novel naphthalene diimide (NDI) derivatives containing naphthalene units which are covalently attached to either end of the NDI.

APA, Harvard, Vancouver, ISO, and other styles

14

Li, Jinjin, Zhi Zheng, Xiao Cui, Yunhu Liu, Ting Fan, Yueyue Liu, Dalei Chang, and Dezheng Yang. "Decomposition of Naphthalene by Dielectric Barrier Discharge in Conjunction with a Catalyst at Atmospheric Pressure." Catalysts 12, no. 7 (July 5, 2022): 740. http://dx.doi.org/10.3390/catal12070740.

Full text

Abstract:

In this study, coaxial dielectric barrier discharge (DBD) plasma, in conjunction with a metal oxide catalyst, was used to degrade naphthalene. The characteristics of plasma discharge were studied by measuring voltage and current waveforms and the Lissajous figure. The effects of different parameters of the process on naphthalene decomposition in air were investigated. XRD, BET, and SEM data were used to investigate the nature, specific surface area, and surface morphology of the catalyst. The results show that the mineralization of naphthalene reached 82.2% when the initial naphthalene concentration was 21 ppm and the total gas flow rate was 1 L/min in the DBD reactor filled with Al2O3. The mineralization of naphthalene first increased and then became stable with the increase in treatment time and discharge power. The TiO2 catalyst has more apparent advantages than the two other studied catalysts in terms of the removal efficiency and mineralization of naphthalene due to this catalyst’s large specific surface area, porous structure, and photocatalytic properties. In addition, the introduction of a small amount of water vapor can promote the mineralization and CO2 selectivity of naphthalene. With further increases in the water vapor, Fe2O3 has a negative effect on the naphthalene oxidation due to its small pore size. The TiO2 catalyst can overcome the adverse effects of water molecule attachment due to its photocatalytic properties.

APA, Harvard, Vancouver, ISO, and other styles

15

Al Kobaisi, Mohammad, Sidhanath V. Bhosale, Kay Latham, Aaron M. Raynor, and Sheshanath V. Bhosale. "Functional Naphthalene Diimides: Synthesis, Properties, and Applications." Chemical Reviews 116, no. 19 (August 26, 2016): 11685–796. http://dx.doi.org/10.1021/acs.chemrev.6b00160.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Zheng, Daoyuan, Mingxing Zhang, and Guangjiu Zhao. "The promotion effects of thionation and isomerization on charge carrier mobility in naphthalene diimide crystals." Phys. Chem. Chem. Phys. 19, no. 41 (2017): 28175–81. http://dx.doi.org/10.1039/c7cp03787b.

Full text

Abstract:

Herein, the promotion effects of thionation and isomerization on the carrier mobility properties of naphthalene diimide and thionated naphthalene diimide crystals were investigated in detail based on the Marcus–Hush theory and quantum-chemical calculations.

APA, Harvard, Vancouver, ISO, and other styles

17

Nechaev, Lev V., Olga N. Tchaikovskaya, Elizaveta V. Maltseva, and Natalya V. Yudina. "Development of a New Technology of Environmental Purification from Naphthalene." Advanced Materials Research 1085 (February 2015): 154–60. http://dx.doi.org/10.4028/www.scientific.net/amr.1085.154.

Full text

Abstract:

Results of investigation of naphthalene interaction with humic acids of high-moor peat and their fractions are presented in the article. The elemental and structural-group compositions of humic acids of high-moor peat and of their fractions are determined, average values of their molecular masses are found, and their spectral and luminescent properties are investigated. Numerical values of constants of naphthalene interaction with humic acids and their fractions are calculated, and the polarity of naphthalene microenvironment in solutions of humic acids is estimated. The results of investigations suggest that the maximum affinity of naphthalene is observed to the fraction of hematomelanic acids and that the naphthalene microenvironment in solutions of the given fraction is polar.

APA, Harvard, Vancouver, ISO, and other styles

18

Du, Chuan Wei, and Guo Zhong Li. "Study on Effect and Action Mechanism of Different Superplasticizer on Properties of Titanium Gypsum." Applied Mechanics and Materials 468 (November 2013): 24–27. http://dx.doi.org/10.4028/www.scientific.net/amm.468.24.

Full text

Abstract:

The chemical modification of titanium gypsum was made by calcium lignosulfonate, naphthalene and polycarboxylate superplasticizer. The effect of different superplasticizer on the physical properties of titanium gypsum was studied. The test results show that the standard consistency water, setting time and mechanical strength of titanium gypsum had changed to different extent with the three types of superplasticizer added. Naphthalene superplasticizer had best modification effect on titanium gypsum and its optimum content was 3%. When the naphthalene superplasticizer dosage was 3%, the 2h flexural strength and the 2h compressive strength of sample were 1.15MPa and 2.37MPa. The micro structure of titanium gypsum hydration products was analysed by SEM and the action mechanism of superplasticizer was analysed.

APA, Harvard, Vancouver, ISO, and other styles

19

Cimerman, Richard, Mária Cíbiková, Leonid Satrapinskyy, and Karol Hensel. "The Effect of Packing Material Properties on Tars Removal by Plasma Catalysis." Catalysts 10, no. 12 (December 17, 2020): 1476. http://dx.doi.org/10.3390/catal10121476.

Full text

Abstract:

Plasma catalysis has been utilized in many environmental applications for removal of various hydrocarbons including tars. The aim of this work was to study the tars removal process by atmospheric pressure DBD non-thermal plasma generated in combination with packing materials of various composition and catalytic activity (TiO2, Pt/γAl2O3, BaTiO3, γAl2O3, ZrO2, glass beads), dielectric constant (5–4000), shape (spherical and cylindrical pellets and beads), size (3–5 mm in diameter, 3–8 mm in length), and specific surface area (37–150 m2/g). Naphthalene was chosen as a model tar compound. The experiments were performed at a temperature of 100 °C and a naphthalene initial concentration of approx. 3000 ppm, i.e., under conditions that are usually less favorable to achieve high removal efficiencies. For a given specific input energy of 320 J/L, naphthalene removal efficiency followed a sequence: TiO2 > Pt/γAl2O3 > ZrO2 > γAl2O3 > glass beads > BaTiO3 > plasma only. The efficiency increased with the increasing specific surface area of a given packing material, while its shape and size were also found to be important. By-products of naphthalene decomposition were analyzed by means of FTIR spectrometry and surface of packing materials by SEM analysis.

APA, Harvard, Vancouver, ISO, and other styles

20

Jia, Hongxing, Yuyue Gao, Qiang Huang, Shengsheng Cui, and Pingwu Du. "Facile three-step synthesis and photophysical properties of [8]-, [9]-, and [12]cyclo-1,4-naphthalene nanorings via platinum-mediated reductive elimination." Chemical Communications 54, no. 8 (2018): 988–91. http://dx.doi.org/10.1039/c7cc07370d.

Full text

Abstract:

A facile three-step synthesis of [8]-, [9]-, and [12]cyclo-1,4-naphthalene nanorings was for the first time accomplished via a platinum-mediated assembly of 1,4-naphthalene-based units and subsequent reductive elimination reactions.

APA, Harvard, Vancouver, ISO, and other styles

21

Nencetti, Susanna, Lidia Ciccone, Armando Rossello, Elisa Nuti, Claudio Milanese, and Elisabetta Orlandini. "Synthesis and cycloxygenase inhibitory properties of new naphthalene-methylsulfonamido, naphthalene-methylsulfonyl and tetrahydronaphthalen-methylsulfonamido compounds." Journal of Enzyme Inhibition and Medicinal Chemistry 30, no. 3 (August 4, 2014): 406–12. http://dx.doi.org/10.3109/14756366.2014.940937.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Liu, Jian-Jun, Teng Liu, Shu-Biao Xia, Chi-Xian He, Fei-Xiang Cheng, Mei-Jin Lin, and Chang-Cang Huang. "Cocrystals of naphthalene diimide with naphthalene derivatives: A facile approach to tune the luminescent properties." Dyes and Pigments 149 (February 2018): 59–64. http://dx.doi.org/10.1016/j.dyepig.2017.09.058.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Murakami, Mutsuaki, Susumu Yoshimura, and Sumio Iijima. "Structural properties of graphitized poly‐peri‐naphthalene whiskers." Applied Physics Letters 48, no. 6 (February 10, 1986): 390–92. http://dx.doi.org/10.1063/1.96561.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Kokan, Zoran, Berislav Perić, Janja Makarević, Goran Štefanić, Leo Frkanec, and Srećko I. Kirin. "Crystal structure and gelation properties of naphthalene bioconjugates." Acta Crystallographica Section A Foundations and Advances 71, a1 (August 23, 2015): s450—s451. http://dx.doi.org/10.1107/s2053273315093389.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Leu, Tsu-Shang, and Chun-Shan Wang. "Synthesis and properties of copolyimides containing naphthalene group." Polymer 43, no. 25 (January 2002): 7069–74. http://dx.doi.org/10.1016/s0032-3861(02)00530-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Feng, Jinwu, Xiaopeng Chen, Qingchuan Han, Hongbo Wang, Ping Lu, and Yanguang Wang. "Naphthalene-based fluorophores: Synthesis characterization, and photophysical properties." Journal of Luminescence 131, no. 12 (December 2011): 2775–83. http://dx.doi.org/10.1016/j.jlumin.2011.06.027.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Cheon, Jong-Woo, Chil-Won Lee, Myoung-Seon Gong, and Neri Geum. "Chemiluminescent properties of blue fluorophores containing naphthalene unit." Dyes and Pigments 61, no. 1 (April 2004): 23–30. http://dx.doi.org/10.1016/j.dyepig.2003.08.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Kim, Yeong-Eun, and Jong-Wook Park. "Luminescent Properties of Pentacene Derivatives with Naphthalene Moiety." Molecular Crystals and Liquid Crystals 444, no. 1 (February 1, 2006): 137–43. http://dx.doi.org/10.1080/15421400500365318.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Wang, Chun-Shan, and Hann-Jang Hwang. "Synthesis and properties of novel naphthalene-containing bismaleimides." Journal of Applied Polymer Science 60, no. 6 (May 9, 1996): 857–63. http://dx.doi.org/10.1002/(sici)1097-4628(19960509)60:6<857::aid-app8>3.0.co;2-i.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Rabanzo-Castillo, Kristel M., Muhammad Hanif, Tilo Söhnel, and Erin M. Leitao. "Synthesis, characterisation and electronic properties of naphthalene bridged disilanes." Dalton Transactions 48, no. 37 (2019): 13971–80. http://dx.doi.org/10.1039/c9dt03058a.

Full text

Abstract:

The synthesis of a series of naphthalene bridged disilanes and siloxanes via catalytic intramolecular dehydrocoupling was achieved, and the effect of the substituents on the structure and electronic properties of the compounds was investigated.

APA, Harvard, Vancouver, ISO, and other styles

31

Gutiérrez, Mario, Félix Sánchez, and Abderrazzak Douhal. "Spectral and dynamical properties of a Zr-based MOF." Physical Chemistry Chemical Physics 18, no. 7 (2016): 5112–20. http://dx.doi.org/10.1039/c5cp04436g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Parales, Rebecca E., Juanito V. Parales, and David T. Gibson. "Aspartate 205 in the Catalytic Domain of Naphthalene Dioxygenase Is Essential for Activity." Journal of Bacteriology 181, no. 6 (March 15, 1999): 1831–37. http://dx.doi.org/10.1128/jb.181.6.1831-1837.1999.

Full text

Abstract:

ABSTRACT The naphthalene dioxygenase enzyme system carries out the first step in the aerobic degradation of naphthalene byPseudomonas sp. strain NCIB 9816-4. The crystal structure of naphthalene dioxygenase (B. Kauppi, K. Lee, E. Carredano, R. E. Parales, D. T. Gibson, H. Eklund, and S. Ramaswamy, Structure 6:571–586, 1998) indicates that aspartate 205 may provide the most direct route of electron transfer between the Rieske [2Fe-2S] center of one α subunit and mononuclear iron in the adjacent α subunit. In this study, we constructed four site-directed mutations that changed aspartate 205 to alanine, glutamate, asparagine, or glutamine to test whether this residue is essential for naphthalene dioxygenase activity. The mutant proteins were very inefficient in oxidizing naphthalene tocis-naphthalene dihydrodiol, and oxygen uptake in the presence of naphthalene was below detectable levels. The purified mutant protein with glutamine in place of aspartate 205 had identical spectral properties to wild-type naphthalene dioxygenase and was reduced by NADH in the presence of catalytic amounts of ferredoxinNAP and reductaseNAP. Benzene, an effective uncoupler of oxygen consumption in purified naphthalene dioxygenase, did not elicit oxygen uptake by the mutant protein. These results indicate that electron transfer from NADH to the Rieske center in the mutant oxygenase is intact, a finding consistent with the proposal that aspartate 205 is a necessary residue in the major pathway of electron transfer to mononuclear iron at the active site.

APA, Harvard, Vancouver, ISO, and other styles

33

Gündüz qızı Əmirova, Günel. "Naftalan healing oil." NATURE AND SCIENCE 13, no. 08 (October 23, 2021): 36–39. http://dx.doi.org/10.36719/2707-1146/13/36-39.

Full text

Abstract:

Naphthalan oil is a unique therapeutic factor that has no analogues in the whole world. The healing properties of naphthalan, a special type of oil, have been known to medicine for over 600 years, and are successfully used in the treatment of various diseases. The uniqueness of naphthalan is manifested in its biological effect on the body. Today there are two naphthalan deposits in the world, on which resorts are built - Naftalan in Azerbaijan and Naftalan in Croatia, founded in 1989. The spectrum of use of this therapeutic oil is so wide that it is rightly considered a medical phenolmenon in the field of modification naftalan oil is an anti-inflammatory, folliculin-like, pain-reducing, softening, easy-to-use and low-cost drug. Naftalan oil is a unique natural medicine for its biological qualities, it is not a fuel, it is not found anywhere in the world with such characteristics. Key words: therapeutic naphthalene oil, fractions, naphthenic hydrocarbons, distillation

APA, Harvard, Vancouver, ISO, and other styles

34

Song, Jin Mei, Yu Xiu Zhang, and Shu Quan Zhu. "Preparation and Properties of Modified Lignin Used as Additive of Brown Coal CWS." Advanced Materials Research 690-693 (May 2013): 1479–82. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.1479.

Full text

Abstract:

The lignin condensated sulfonated naphthalene (abbreviated as LCSN) was prepared by condensation reaction. The electrical conductivity and the weight molecular of LCSN were determined by electrical conductivity meter, and Ubbelohde viscosimeter, and Critical Micelle Concentration (abbreviated as CMC) and HLB of the modified lignin were calculated. LCSN was characterized and verified by Fourier and scanning electron microscope, transform infrared spectroscopy (abbreviated as FTIR). SEM images revealed morphology of modified lignin. Under the same dosage, compared with raw material, concentration of lignite CWS used LCSN as an additive increased by 4.1%, which reached the same concentration of CWS as Naphthalene dispersants.

APA, Harvard, Vancouver, ISO, and other styles

35

Welsh, Thomas A., Olga Matsarskaia, Ralf Schweins, and Emily R. Draper. "Electronic and assembly properties of a water-soluble blue naphthalene diimide." New Journal of Chemistry 45, no. 31 (2021): 14005–13. http://dx.doi.org/10.1039/d1nj02557k.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Marzuki, I., K. Nisaa, R. Asaf, R. Armus, M. Kamaruddin, A. Sapar, and A. Emelda. "Biodegradation mechanism of naphthalene using marine sponge symbiotic bacteria." IOP Conference Series: Earth and Environmental Science 890, no. 1 (October 1, 2021): 012020. http://dx.doi.org/10.1088/1755-1315/890/1/012020.

Full text

Abstract:

Abstract Generally, all petroleum processing industries produce oil sludge or sludge. Polycy-clic Aromatic Hydrocarbons (PAH), one of the components contained in sludge, are hazardous and toxic waste material with toxic, carcinogenic and mutagenic properties. The research objective was to understand the biodegradation mechanism of naphthalene by utilizing a marine sponge symbiotic bacterial isolate. Partial bacteria Bacillus Sp strain AB353f (BC), sponge isolate Neopetrosia sp and Acinetobacter Calcoaceticus strain PHCDB14 (AC) isolate sponge Callyspongia (Aerizusa) as biomaterial for PAH degradation. Biodegradation method integrates bacterial suspension with 10,000 ppm naphthalene for 25 days. Every 5 days, the bio-degradation indicators were observed and the products of the destruction of naphthalene components were measured using FTIR and GC-MS. The results showed that BC isolates and AC isolates from sponge symbionts could degrade naphthalene. The biodegradation performance of BC bacteria tended to be more dominant than AC against naphthalene. Based on the functional groups resulting from FTIR, three types of biodegradation products were identified, namely: alcohol, aldehyde and carboxylic acid and one transition product in the form of a cate-chol. Maximum naphthalene bio-degradation occurs at an interaction period of 20 - 25 days.

APA, Harvard, Vancouver, ISO, and other styles

37

Bush, Benjamin F., and J. J. Lagowski. "The electrochemical properties of the (μ-η6,η6-naphthalene)dichromium compounds and bis(η6-naphthalene)chromium." Journal of Organometallic Chemistry 386, no. 1 (April 1990): 37–50. http://dx.doi.org/10.1016/0022-328x(90)80255-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Abu El-Rub, Ziad, Eddy Bramer, Samer Al-Gharabli, and Gerrit Brem. "Impact of Char Properties and Reaction Parameters on Naphthalene Conversion in a Macro-TGA Fixed Char Bed Reactor." Catalysts 9, no. 4 (March 28, 2019): 307. http://dx.doi.org/10.3390/catal9040307.

Full text

Abstract:

Catalytic tar removal is one of the main challenges restricting the successful commercialization of biomass gasification. Hot gas cleaning using a heterogeneous catalyst is one of the methods used to remove tar. In order to economically remove tar, an efficient low-cost catalyst should be applied. Biomass char has the potential to be such a catalyst. In this work, the reactor parameters that affect the conversion of a model tar component “naphthalene” were investigated employing an in situ thermogravimetric analysis of a fixed bed of biomass char. The following reactor and catalyst parameters were investigated: bed temperature (750 to 900 °C), gas residence time in the char bed (0.4 to 2.4 s), char particle size (500 to 1700 μm), feed naphthalene concentration, feed gas composition (CO, CO2, H2O, H2, CH4, naphthalene, and N2), char properties, and char precursor. It was found that the biomass char has a high activity for naphthalene conversion. However, the catalytic performance of the biomass char was affected by the gasification reactions that consumed its carbon, and the coke deposition that reduced its activity. Furthermore, high ash and iron contents enhanced char activity. The results of this work will be used in the design of a process that uses biomass char as an auto-generated catalyst in the gasification process.

APA, Harvard, Vancouver, ISO, and other styles

39

Rybakiewicz, Renata, Izabela Tszydel, Joanna Zapala, Lukasz Skorka, Damian Wamil, David Djurado, Jacques Pécaut, Jacek Ulanski, Malgorzata Zagorska, and Adam Pron. "New semiconducting naphthalene bisimides N-substituted with alkoxyphenyl groups: spectroscopic, electrochemical, structural and electrical properties." RSC Adv. 4, no. 27 (2014): 14089–100. http://dx.doi.org/10.1039/c4ra00052h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Wu, Bin, Wen Hong Tao, Xing Hua Fu, and Fu Xing Wang. "Study on the Performance on Some Admixture of Sulphoaluminate Cement Waterproof Mortar." Applied Mechanics and Materials 740 (March 2015): 47–50. http://dx.doi.org/10.4028/www.scientific.net/amm.740.47.

Full text

Abstract:

The influence of the naphthalene superplasticizer, aliphatic superplasticizer and water repellent on the properties of sulphoaluminate cement mortar such as strength and anti permeability was studied by orthogonal test method, and the microstructure of hydration products of hardened mortar was observed by X-Ray and SEM. The results showed that, adding amount of additive in sulphoaluminate cement, can improve mechanical properties of sulphoaluminate cement, and effectively improve waterproof performance and impermeability of mortar. When the water repellent admixture is 0.2%, the naphthalene superplasticizer 0.7%, aliphatic superplasticizer 1%, mortar impermeability is at its best, reaching 1.6MPa.

APA, Harvard, Vancouver, ISO, and other styles

41

Silva, Wilson Ricardo Leal, Luiz Roberto Prudêncio, Alexandre Lima Oliveira, Gabriela Damo, and Eduardo Tochetto. "Influence of Air Temperature on the Performance of Different Water-Reducing Admixtures with Respect to the Properties of Fresh and Hardened Mortar." Advances in Civil Engineering 2010 (2010): 1–10. http://dx.doi.org/10.1155/2010/136768.

Full text

Abstract:

The performance of water-reducing admixtures used in concrete is affected by the weather conditions to which the concrete mixture is exposed. The most used WRAs are lignosulfonate, naphthalene, and polycarboxylate. However, they react differently to weather conditions, especially to air temperature. Therefore, it can be useful to evaluate how temperature affects admixture performance. In this study, the performance of three admixtures (naphthalene, lignosulfonate, and polycarboxylate) was evaluated at 15, 25, and 35°C by means of the flow table test, mixture air content, and compressive strength. Moreover, mixture temperature was monitored and time-temperature curves were plotted in order to assess whether the admixtures affected cement hydration reactions at different temperatures. The final results indicate that an increase in temperature leads to an increase in saturation dosage; lignosulfonate had the most pronounced retarding effect, followed by polycarboxylate, and finally, naphthalene, and considering the weather conditions in the area where the study was carried, the final finding would be that the naphthalene-based admixture had the best performance.

APA, Harvard, Vancouver, ISO, and other styles

42

Tang, Xianxian, Taoxiang Liu, Han Li, Dongwang Yang, Liangjun Chen, and Xinfeng Tang. "Notably enhanced thermoelectric properties of lamellar polypyrrole by doping with β-naphthalene sulfonic acid." RSC Advances 7, no. 33 (2017): 20192–200. http://dx.doi.org/10.1039/c7ra02302b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Narayan, B., K. Nagura, T. Takaya, K. Iwata, A. Shinohara, H. Shinmori, H. Wang, et al. "The effect of regioisomerism on the photophysical properties of alkylated-naphthalene liquids." Physical Chemistry Chemical Physics 20, no. 5 (2018): 2970–75. http://dx.doi.org/10.1039/c7cp05584f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Jeong, Jaemin, Fiaz Hussain, Sangwon Park, Soo-Jung Kang, and Jinhwan Kim. "High Thermal Stability, High Tensile Strength, and Good Water Barrier Property of Terpolyester Containing Biobased Monomer for Next-Generation Smart Film Application: Synthesis and Characterization." Polymers 12, no. 11 (October 23, 2020): 2458. http://dx.doi.org/10.3390/polym12112458.

Full text

Abstract:

This research synthesizes novel copolyester (PCITN) containing biobased isosorbide, 1,4-cyclohexandimethanol, terephthalic acid, and 2,6-naphthalene dicarboxylic acid and characterize its properties. The PCITN copolyester was extruded into film, and its performance properties including: tensile strength, Young’s modulus, thermal, dimensional stability, barrier (water barrier), and optical (birefringence and transmittance) were analyzed after uniaxial stretching. The films have higher Tg, Tm, dimensional stability, and mechanical properties than other polyester-type polymers, and these performance properties are significantly increased with increasing stretching. This is due to the increased orientation of molecular chains inside the films, which was confirmed by differential scanning calorimetry (DSC), X-ray diffraction (XRD), and birefringence results. Good water barrier (0.54%) and lower birefringence (△n: 0.09) of PCITN film compared to poly(ethylene terephthalate) (PET), poly(ethylene 2,6-naphthalate) (PEN), and polyimide (PI) films, used as conventional substrate materials for optical devices, make it an ideal candidate as performance material for next-generation flexible devices.

APA, Harvard, Vancouver, ISO, and other styles

45

Pandeeswar, M., Harshavardhan Khare, Suryanarayanarao Ramakumar, and T. Govindaraju. "Biomimetic molecular organization of naphthalene diimide in the solid state: tunable (chiro-) optical, viscoelastic and nanoscale properties." RSC Adv. 4, no. 39 (2014): 20154–63. http://dx.doi.org/10.1039/c3ra47257d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Dikusar, E. I., L. I. Filippovich, S. N. Shahab, S. K. Petkevich, and S. G. Stepin. "(E,E)-diazomethines based on naphthalene-1,5-diamine and the study of their polarizrization properties." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 56, no. 1 (March 19, 2020): 67–74. http://dx.doi.org/10.29235/1561-8331-2020-56-1-67-74.

Full text

Abstract:

Liquid crystal devices are widely used in measuring instrumentation, consumer and industrial electronics, medical, scientific and military equipment. The production of these devices is a promising and developing industry. Analysis of the market of liquid crystal devices suggests that the demand for film polarizers of transmission, reflection and transmission reflection types will increase due to the constant growth of production of liquid crystal indicators and the expansion of their applications. Studies aimed at the creation of film polarizers for various functional purposes and the development of technologies for their manufacture are relevant. Naphthalene-1,5-diamine widely used in the production of complex intermediate intermediates, dyes, chemical additives to polymers, pharmaceuticals, pesticides, etc. Naphthalene-1,5-diamine is an available starting compound for obtaining on its base promising substances for the development of optical materials and biologically active compounds. By interaction of naphthalene-1,5-diamine with substituted aldehydes or benzaldehydes of vanillin series in the medium of boiling absolute methanol in the presence of catalytic amounts of glacial acetic acid, (E,E)-diazomethines with yields of 75–87 % were synthesized.

APA, Harvard, Vancouver, ISO, and other styles

47

Weißenstein, Annike, Vincenzo Grande, Chantu R. Saha-Möller, and Frank Würthner. "Water-soluble naphthalene diimides: synthesis, optical properties, and colorimetric detection of biogenic amines." Organic Chemistry Frontiers 5, no. 18 (2018): 2641–51. http://dx.doi.org/10.1039/c8qo00611c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Taima, Masahiro, Yuka Ishida, and Tatsuo Arai. "Intramolecular energy transfer and photoisomerization in stilbene dendrimers." Canadian Journal of Chemistry 95, no. 9 (September 2017): 1013–23. http://dx.doi.org/10.1139/cjc-2017-0137.

Full text

Abstract:

Stilbene dendrimers with energy harvesting chromophores, such as naphthalene and benzophenone, have been prepared and their photochemical and photophysical properties have been examined. These dendrimers underwent trans–cis mutual photoisomerization on excitation of the core stilbene or the peripheral naphthalene and benzophenone chromophores through several energy transfer processes, and photophysical processes such as intersystem crossing finally resulted in cis-trans isomerization of the core stilbene.

APA, Harvard, Vancouver, ISO, and other styles

49

Kalita, Kalyan Jyoti, Indrajit Giri, and Ratheesh K. Vijayaraghavan. "Influence of non-covalent interactions in dictating the polarity and mobility of charge carriers in a series of crystalline NDIs: a computational case study." RSC Advances 11, no. 53 (2021): 33703–13. http://dx.doi.org/10.1039/d1ra05274h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Ling, Qing-Hui, Jun-Long Zhu, Yi Qin, and Lin Xu. "Naphthalene diimide- and perylene diimide-based supramolecular cages." Materials Chemistry Frontiers 4, no. 11 (2020): 3176–89. http://dx.doi.org/10.1039/d0qm00540a.

Full text

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!