Bibliografías temáticas / N-phenyl

Literatura académica sobre el tema "N-phenyl"

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Publicado: 18 de mayo de 2024

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Artículos de revistas sobre el tema "N-phenyl"

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Ajibade, Peter A., Benjamin C. Ejelonu y Bernard Omondi. "N-Ethyl-N-phenyl{[ethyl(phenyl)carbamothioyl]disulfanyl}carbothioamide". Acta Crystallographica Section E Structure Reports Online 68, n.º 7 (23 de junio de 2012): o2182. http://dx.doi.org/10.1107/s1600536812027808.

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Shen, Heng-Shui, Nan Liu, Zi-Cheng Li y Wen-Cai Huang. "N-Ethyl-N-phenyl-N′-tosylformamidine". Acta Crystallographica Section E Structure Reports Online 65, n.º 7 (17 de junio de 2009): o1582. http://dx.doi.org/10.1107/s1600536809021953.

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Fu, T. Y., J. R. Scheffer y J. Trotter. "N-Phenyl-N-(phenylthioxomethyl)benzamide". Acta Crystallographica Section C Crystal Structure Communications 54, n.º 1 (15 de enero de 1998): 101–2. http://dx.doi.org/10.1107/s0108270197011244.

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Dou, Shi-qi, B. Thimme Gowda, Helmut Paulus y Alarich Weiss. "The Bond N-Cl. Crystal Structures and 35Cl NQR of N-Chloro-N-Phenyl-2-chloroacetamide, N-Chloro-N-phenyl-2,2-dichloroacetamide, N-Chloro-N-phenyl-2,2,2-trichloroacetamide, and N-Phenyl-2,2,2-trichloroacetamide". Zeitschrift für Naturforschung A 49, n.º 12 (1 de diciembre de 1994): 1136–44. http://dx.doi.org/10.1515/zna-1994-1206.

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Abstract The crystal structures of C6H5NClCOCH2Cl (1), C6H5NClCOCHCl2 (2), C6H5NClCOCCl3 (3),and C6H5NHCOCCl3 (4) have been determined at room temperature (lattice constants, d in pm).(1): P21 /c, Z = 4, a = 738, b = 645, c = 1891, β = 90.41°, d (N -C l) = 171, d (C = O ) = 121; (2): P21 /c, Z = 4, a = 820, b = 1495, c = 905, β = 114.78°, d (N -Cl) = 171, d (C = O ) = 120; (3): P 21/c, Z = 4,a = 819, b = 1853, c = 718, β = 103.64°, d (N -Cl) = 172, d (C = O ) = 120; (4): P21/c, Z = 4, a = 551, b = 1704, c = 1035, β = 93.08°, d (C = O) = 121.For (2), (3), and (4) the 35Cl NQR frequencies have been determined in the range 77 ≤ T /K ≤ 300. At 77 K (γ in MHz): (2): γ(w,1) = 37.600, γ(w,2) = 38.188, γ(N) = 51.858; (3): γ(w,1) = 39.944, γ(w,2) = 40.512, γ(w,3) = 40.739, γ(N) = 52.791; (4): γ(w,1) = 39.428, γ(w,2) = 39.452, γ(w,3) = 39.986. For the compound C6H5NHCOCHCl2 (5) the 35Cl NQ R measured at 77 K is: γ(w,1) = 37.195 MHz, γ(w,2) = 37.596 MHz. The relation, γ(35Cl) = d (N -Cl) is discussed.
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Han, Li-Ping, Bin Li, Jie Liu y Qing-Chun Liu. "N-Phenyl-N-{4-[5-(2-phenyl-3-pyridyl)-1,3,4-oxadiazol-2-yl]phenyl}aniline". Acta Crystallographica Section E Structure Reports Online 63, n.º 12 (21 de noviembre de 2007): o4780. http://dx.doi.org/10.1107/s1600536807058382.

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Young Chang, Ji, Tae Ja Kim, Man Jung Han y Kyu Ho Chae. "Polymerization of N-[4-(azidocarbonyl)phenyl]maleimide and N-[4-(N′-phenoxycarbonylamino)phenyl]maleimide". Polymer 40, n.º 14 (junio de 1999): 4049–54. http://dx.doi.org/10.1016/s0032-3861(98)00600-4.

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Özçelik, Suzan, Muharrem Dinçer, Memet Şekerci, Ayla Balaban y Ümmühan Özdemir. "N-Phenyl-N′-(2-thienylmethylene)hydrazine". Acta Crystallographica Section E Structure Reports Online 60, n.º 9 (21 de agosto de 2004): o1552—o1553. http://dx.doi.org/10.1107/s1600536804019932.

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Fu, T. Y., J. R. Scheffer y J. Trotter. "N-Phenyl-N-(phenylthioxomethyl)benzamide. Erratum". Acta Crystallographica Section C Crystal Structure Communications 54, n.º 4 (15 de abril de 1998): 562. http://dx.doi.org/10.1107/s0108270198003357.

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Mo, Shanyan. "N-Cyano-N-phenyl-p-toluenesulfonamide". Synlett 25, n.º 09 (11 de abril de 2014): 1337–38. http://dx.doi.org/10.1055/s-0033-1341246.

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Khan, Islam Ullah, Mehmet Akkurt, Faiza Anwar y Shahzad Sharif. "N-[4-(N-Cyclohexylsulfamoyl)phenyl]acetamide". Acta Crystallographica Section E Structure Reports Online 66, n.º 4 (20 de marzo de 2010): o868—o869. http://dx.doi.org/10.1107/s160053681000961x.

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Tesis sobre el tema "N-phenyl"

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Zink, Landon. "Synthesis of N-(substituted phenyl) acetamides". Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/honors/131.

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Chhetri, Manjit Singh. "N-cyclohenyl, N-phenyl nitrones and their potentiality in isoxazolidine and isoxazoline syntheses". Thesis, University of North Bengal, 2010. http://hdl.handle.net/123456789/1364.

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Kafley, Saurav. "Synthesis and 1, 3 -dipolar cycloaddition reaction of N-phenyl £ chlora nitrone". Thesis, University of North Bengal, 2010. http://hdl.handle.net/123456789/1419.

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Sharma, Prawin Kumar. "Greener approach to the synthesis of some novel class of isoxazolidine and isoxazoline derivatives using N-methyl and N-phenyl-a-chloro nitrones". Thesis, University of North Bengal, 2016. http://ir.nbu.ac.in/handle/123456789/1884.

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Dias, Marylene. "Cytokinines de la famille des n-phenyl-n-pyridylurees : synthèse d'analogues et étude photolytique d'un dérivé azido". Angers, 1994. http://www.theses.fr/1994ANGE0005.

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Dans l'espoir de mettre en évidence une activité anticytokinine dans les dérivés des n-phenyl-n-pyridylurees, 10 molécules, 9 urées et un carbamate, analogues structuraux de la n-benzyl-n-(2,6-dichloropyrid-4-yl) urée ont été synthétisés. Ces composés ont été obtenus par réaction de pyridylisocyanates ou de pyridylcarbamates avec des dérivés amines ou l'alcool benzylique. Nous avons par ailleurs mis en évidence l'impossibilité d'obtenir des urées par réaction des 4-amino-pyridines 2-substituées et de l'isocyanate de benzyle à cause de réactions secondaires. Les tests biologiques ont montré que certaines des molécules préparées possédaient un fort pouvoir inhibiteur de la croissance cellulaire. L'activité anticytokinine n'a pas été détectée. L'étude de la photolyse de la n-(6-azido-2-chloropyrid-4-yl)-n-phenyluree, réactif de marquage par photoaffinité des protéines affines des cytokinines, en présence de nucléophiles, a mis en évidence l'agrandissement du cycle pyridine en diazépine ainsi que la substitution de l'atome de chlore. La position de l'équilibre azidotetrazole dans cette azidopyridine a été étudiée dans différents solvants. Elle peut influer sur la nature des produits de photolyse, mais l'existence de cet équilibre n'est pas préjudiciable pour le marquage par photoaffinité.
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Tomlinson, Ian David. "Studies of the mode of action of 2-phenoxy-N-phenyl nicotinamides as herbicides". Thesis, University of Essex, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328368.

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Roleder, Carly. "Synthesis and Characterization of a Novel Platinum Ligand Complex ((κ-N,C,N- 2,6-bis(diethylaminomethyl)phenyl)(4- tert-butylphenyl) platinum(II))". Scholarship @ Claremont, 2018. http://scholarship.claremont.edu/cmc_theses/1732.

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A novel platinum ligand complex (NCN)PtAr, ((κ-N,C,N- 2,6-bis (diethylaminomethyl)phenyl)(4- tert-butylphenyl) platinum(II)), was synthesized. A reaction of 1-Bromo-4-tert-butylbenzene Grignard with (NCN)PtCl, (where NCN = 2,6-bis(diethylaminomethyl)phenyl) yielded the (NCN)PtAr (where Ar = 4-tert­-butylphenyl). The product was then characterized with NMR spectra through 1H NMR, 13C NMR, COSY, HSQC, and HMBC to verify it structure.
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LAGE, NADIA. "Formation regioselective de liaisons carbone-carbone et synthese de cetenimines a partir de n-phenyl imidothioesters". Caen, 1992. http://www.theses.fr/1992CAEN2049.

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Par l'intermediaire de cetenimines issues de la decomposition (perte de mesli ou mesmgbr) de n-phenyl imidothioesters de methyle metalles, des syntheses quasi one pot de cetones dissymetriquement substituees sont decrites. En particulier, l'addition-1,4 selective d'un premier organomagnesien sur un imido-thioester alpha insature, suivie de celle d'un deuxieme reactif de grignard sur la cetenimine intermediairement formee, permet la synthese 2c+4c+4c de cetones terpeniques (2,6-dimethylocta-1,7-diene-4-one et 2,6-dimethylocta-2-ene-4-one). Une synthese 5c+5c de l'artemisia cetone et de la 5,6-dihydroartemisia cetone par monoaddition du magnesien de prenyle sur deux imidothioesters est egalement decrite. A partir de n-phenyl ethanimidothioate de methyle lithie, des reactions de c-alkylations, d'aldolisation et d'acylation sont decrites. Elles conduisent respectivement a de nouveaux imidothioesters, beta-hydroxyimidothioesters et beta oxoimidothioesters. La reactivite du trimethylsilylethanimidothioate de methyle lithie est etudiee. Des reactions de c-alkylation et l'olefination de type peterson sont realisees. La formation de cetenimines par thermolyse eclair de s,n-acetals de cetenes n-silyles et du n-phenyl trimethylsilylethanimidothioate de methyle est mise en evidence. A partir de ce meme ethanimidothioate alpha silyle, a temperature relativement basse, en milieu basique et via la formation d'une cetenimine lithiee, des cetenimines silylees stables sont preparees. Une etude preliminaire des potentialites synthetiques de ces nouveaux heterocumulenes est effectuee: addition de thiols, d'alcools, de lithiens et de magnesiens
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Li, Yi. "Studies Related to the Alternating Copolymerization of Substituted Stilbenes". Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/33235.

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Stilbene containing polymers are a group of interesting and versatile polymers. The pendent phenyl ring along the polymer backbone can impart unusual rigidity to the polymer backbone due to steric repulsion. By functionalizing stilbene, a variety of functional groups and ionic groups can be precisely placed along the polymer chain with tunable charge density. Therefore, stilbene containing polymers are potentially rod-like polyelectrolytes with controllable charges and charge density. They are the basis of a novel group of rigid synthetic polyelectrolytes and can be used for furthering our knowledge of rigid polyelectrolytes.

A novel series of methyl substituted stilbenes were synthesized and copolymerized with maleic anhydride. A conversion-time study was undertaken to understand the methyl substituent effect on copolymerization rates. Methyl substituted stilbene-maleic anhydride copolymer compositions were determined by quantitative 13C 1D NMR. SEC measurements showed the weight average molecular weights of these copolymers vary from 3 000 to over 1 000 000 g/mol. No glass transition temperature or crystalline melting temperature was observed between 0 oC and 250 oC by DSC. TGA showed that these polymers have 5% weight loss around 290 oC.

Precursors to a polycation and a polyanion based on functionalized stilbenes and maleimides have been prepared: poly(di-t-butyl-(E)-4,4â -stilbenedicarboxylate-co- N-(4-(t-butoxycarbonyl)phenyl)maleimide) and poly(N,N,Nâ ,Nâ -tetraalkyl-4,4â -di- aminostilbenes-co-N-4-(Nâ ,Nâ -dimethylaminophenyl)-maleimide). These copolymer precursors were characterized by 1H NMR, SEC, TGA, and DSC. The 1H NMR spectrum indicated the rigidity of copolymer backbones. SEC measurements showed the weight average molecular weights of these copolymers vary from 5 000 to 11 700 g/mol. No glass transition temperature or crystalline melting temperature was observed between 0 oC and 175 oC by DSC for poly(di-t-butyl-(E)-4,4â -stilbenedicarboxylate-co-N-(4-(t-butoxy- carbonyl)phenyl)maleimide). TGA showed that this polymer has 5% weight loss around 210 oC and 26% weight loss on the first stage of decomposition which corresponds to elimination of t-butyl functional group in the copolymer.

The homopolymerization of EMS-III via free radical polymerization, anionic polymerization and cationic polymerization was attempted. However, no polymer was obtained from any of these polymerization methods. In anionic polymerization, the solution changed to red upon the addition of the initiator sec-bu-Li, indicating the successful addition of the sec-bu-Li to EMS-III. However, the initiated monomer did not propagate to form homopolymer.
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FROMONT, CHRISTOPHE. "Etude de la reactivite de n-phenyl cetenimines silylees vis-a-vis de reactifs nucleophiles et electrophiles". Caen, 1997. http://www.theses.fr/1997CAEN2075.

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La reactivite des n-phenyl-trimethylsilylcetenimines (heterocumulenes faciles d'acces a partir d'un imidothioester silyle) vis-a-vis de reactifs nucleophiles et electrophiles a ete examinee. Le groupe trimethylsilyle sur le carbone stabilise ces cetenimines en reduisant sensiblement leur reactivite en tant qu'electrophiles et apporte donc une contribution ambivalente a la reactivite. Les additions de nucleophiles (organometalliques, alcools, eau, thiols, amines et hydrogenophosphonates) ont lieu sur le carbone central , a temperature ambiante et s'accompagnent souvent d'une desilylation partielle. Cependant, dans certains cas (phenol, thiols), des procedures ont ete mises au point pour eviter toute desilylation. De plus, il a ete montre qu'il etait possible d'utiliser ces heterocumulenes silyles pour realiser a partir de composes difonctionnels des syntheses one-pot d'heterocycles. En particulier, la synthese de n-phenyl-iminocoumarines et de n-phenyl-pyrrolizine. L'addition de reactifs electrophiles sur les cetenimines silylees a ete examinee. Le chlorure de benzenesulfanyle s'additionne rapidement a basse temperature pour conduire a des chlorures d'imidoyles plus ou moins stables et souvent precurseurs de nouvelles cetenimines sulfurees. D'autres reactifs electrophiles (p-tols(o)#2cl, me#3sicl, me#3sibr, accl, (ro)#2p(o)cl), insuffisamment reactifs vis-a-vis des cetenimines silylees ne reagissent que sur le derive lithie de la n-phenyl-trimethylsilylcetenimine (en equilibre avec la forme ynamine lithiee). La regioselectivite (c- ou n-addition) depend du reactif utilise. Ces additions electrophiles ont permis d'obtenir dans la plupart des cas de nouveaux synthons (cetenimines, derives d'ynamines, chlorure d'imidoyles) fonctionnalises dont la reactivite et les potentialites synthetiques seront interessantes a examiner.
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Libros sobre el tema "N-phenyl"

1

Bhatti, Akmal Riaz. Synthesis and investigation of analogues of N-methyl-4- phenyl-1, 2, 3, 6-tetrahydropyridine, (MPTP), a specific dopaminergic neurotoxin. Birmingham: University of Birmingham, 1988.

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N-phenyl-1-naphthylamine. Stuttgart: S. Hirzel, 1994.

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N-phenyl-1-napthylamine (Concise International Chemical Assessment Documents). World Health Organization, 1998.

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Al-Easa, Hala. The synthesis and characterization of N-(2-mercapto-phenyl) salicylaldimine and its complexes: A thesis in chemistry. 1985.

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Capítulos de libros sobre el tema "N-phenyl"

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Bährle-Rapp, Marina. "N-Phenyl-p-Phenylenediamine". En Springer Lexikon Kosmetik und Körperpflege, 380. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_7021.

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Bährle-Rapp, Marina. "N-Phenyl-p-Phenylenediamine HCl". En Springer Lexikon Kosmetik und Körperpflege, 380. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_7022.

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Bährle-Rapp, Marina. "N-Phenyl-p-Phenylenediamine Sulfate". En Springer Lexikon Kosmetik und Körperpflege, 380. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_7023.

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Jeschke, Peter. "N-Benzoyl-N′-Phenyl Ureas as Insecticides, Acaricides, and Termiticides". En Bioactive Carboxylic Compound Classes: Pharmaceuticals and Agrochemicals, 439–52. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527693931.ch33.

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Winkelmann, Jochen. "Diffusion coefficient of N-phenyl-acetamide in water". En Diffusion in Gases, Liquids and Electrolytes, 841. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-540-73735-3_618.

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Wohlfarth, Ch. "Partial specific volume of cellulose N-phenyl carbamate". En Polymer Solutions, 330. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02890-8_153.

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Holze, Rudolf. "Ionic conductivities of N,n,n,-trioctyl-n-methylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate". En Electrochemistry, 1045. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-02723-9_947.

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Wohlfarth, Ch. "Second virial coefficient of amylose tris(N-phenyl carbamate)". En Polymer Solutions, 548. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02890-8_319.

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Wohlfarth, Ch. "Second virial coefficient of cellulose tris(N-phenyl carbamate)". En Polymer Solutions, 555. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02890-8_326.

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Wohlfarth, Ch. "pVT data of cellulose tris(N-phenyl carbamate) in cyclohexanol". En Polymer Solutions, 23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02890-8_22.

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Actas de conferencias sobre el tema "N-phenyl"

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Sen, Ibrahim y Akın Azizoglu. "Computational Study on the Structure of N-(2-Amino-benzoyl)-N'-phenyl hydrazine". En The 17th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2013. http://dx.doi.org/10.3390/ecsoc-17-e003.

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Li, Mei, Yi Gou y Hong Liang. "Cytotoxicity of a bis (N-phenyl-salicydenaminato) copper(II) complex". En International Conference on Medical Engineering and Bioinformatics. Southampton, UK: WIT Press, 2014. http://dx.doi.org/10.2495/meb140511.

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Sugiyama, T., T. Shigemoto, H. Komatsu y T. Ukachi. "Crystal growth and characterization of N-(2,4-dinitrophenyl)-1-chloro-3-phenyl-2-propanamine: a new organic material for nonlinear optics". En OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.fq6.

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Stojković, Danijela, Maja Đukić, Marija Ristić, Marina Ćendić Serafinović, Svetlana Belošević, Emina Mrkalić y Ivan Jakovljević. "Synthesis, characterization and HSA interactions of a new piano-stool ruthenium(II) complex containing a thioamide-type ligand". En 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.507s.

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The synthesis and characterization of a newly synthesized piano-stool [Ru-(ɳ6-p-cymene)Cl2L] complex with a ligand 3-amino-2-cyano-N-phenyl-3-(4-phenyl-1-piperazinyl)-2-propenethioamide are presented. The complex was obtained in good yield as an ochre powderand was characterized by elemental analysis, 1H and 13C NMR, IR, conductometry, and melting point. The fluorescence binding studies showed that the interaction of the complex with albumin occurs by a static quenching mechanism and that the complex showed a very high value of the binding constant with one binding site (Kb = 1.68 × 107; n = 1.37). In order to identify the binding location in the HSA molecule, competitive experiments with site markers (eosin Y (site I) and ibuprofen (site II)) were performed. Obtained results showed that the examined complex binds to the site I of subdomain IIA (for eosin Y: Kb = 5.94 × 102; n = 0.65 vs. for ibuprofen: Kb = 1.38 × 107; n= 1.34).
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Mou, Y. L., W. Xia, Z. Wang y D. Zheng. "Synthesis and Characterization of Styrene, Maleic Anhydride and N-phenyl Maleimide Tripolymer". En 2nd Annual International Conference on Advanced Material Engineering (AME 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/ame-16.2016.180.

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Xu, F., X. D. Zhang, X. R. Dong y G. Liu. "Synthesis and Photochromic Properties of Unsymmetry Diarylethene1-[2-methyl-5- (4-n-amyl-phenyl)-3-thienyl]-2-[2-methyl-1-phenyl] Perfluorocyclopentene". En International Conference on Materials Chemistry and Environmental Protection 2015. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/meep-15.2016.20.

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Chu, Cilong, Zixuan Rao, Pengwu Zheng y Shan Xu. "Synthesis of 4-methyl-2-phenyl-N-(pyridin-2-yl) thiazole-5-carboxamide". En 3RD INTERNATIONAL CONFERENCE ON FRONTIERS OF BIOLOGICAL SCIENCES AND ENGINEERING (FBSE 2020). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0048959.

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Lobankova, Anastasia A., Vyacheslav S. Grinev y Alevtina Yu Yegorova. "Conformational Study of n,n’-(Alkane-1,n-diyl)bis(2-phenyl-3,5-dihydro-4H-imidazol-4-one)s with Different Spacer Length †". En ECSOC 2023. Basel Switzerland: MDPI, 2023. http://dx.doi.org/10.3390/ecsoc-27-16053.

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OuYang, Yiqiang, Chen Chen, Ping Wang, Chao Sun, WuFu Zhu y Shan Xu. "Synthesis of N-4-(4-chloro-3-trifluoromethyl-phenyl)-7-methoxy-quinazoline-4,6-diamine". En 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/mmeceb-15.2016.158.

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Yanagisawa, M., M. Kunimoto y T. Homma. "Chemical Analysis of Ultra-Thin DLC Films and Lubricant/DLC Interface Using Plasmonic Sensors". En ASME 2014 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/isps2014-6908.

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The technical potential of a new plasmonic sensor, which can acquire surface-enhanced Raman spectra with high sensitivity by controlling surface plasmons is demonstrated for the chemical analysis of diamond-like carbon (DLC) films, lubricant films, and the DLC/lubricant interface on magnetic disks of sub-nanometer scale. The Raman spectra of thin DLC films and lubricated DLC carbon can be acquired with a high S/N ratio. Raman spectra of lubricated DLC carbon can also be acquired with the high S/N ratio. The wavenumber shift and intensity change of the Raman peaks of the phenyl and hydroxyl groups in the mixed lubricants (ADOH and Z-tetraol) show that the chemical interaction with the DLC surfaces of the phenyl group in the lubricant molecule decreases with increasing nitrogen content, whereas that of the hydroxyl group with the nitrogenated carbon increases. Raman spectra of nitrogenated DLC films are also acquired, the peaks show good agreement with density functional theory calculations. The calculated bonding energy indicates that the hydroxyl groups interact with the nitrogenated carbon.
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Informes sobre el tema "N-phenyl"

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Chen, Kitmin, Joel Kress, Dali Yang, Alexander Edgar, Oana Marina, Zhenghua Li y Jack Brett. Role of n-phenyl-β-naphthylamine in the Acid-Nitroplasticizer Thermal Aging (ANTA) Experiment. Office of Scientific and Technical Information (OSTI), noviembre de 2023. http://dx.doi.org/10.2172/2205031.

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Naim, Michael, Gary R. Takeoka, Haim D. Rabinowitch y Ron G. Buttery. Identification of Impact Aroma Compounds in Tomato: Implications to New Hybrids with Improved Acceptance through Sensory, Chemical, Breeding and Agrotechnical Techniques. United States Department of Agriculture, octubre de 2002. http://dx.doi.org/10.32747/2002.7585204.bard.

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The tomato, a profitable vegetable crop in both the USA and Israel, has benefited significantly from intensive breeding efforts in both countries, and elsewhere (esp. Holland). : Modem hybrids are highly prolific and resistant to a variety of major pests. They produce attractive, firm fruit for both processing and fresh-marketing. In all cases, however, reduction in flavor and aroma have occurred concomitantly with the increase in yield. Sugars-acids ratio dominate fruit taste, whereas aroma volatiles (potent at minute ppb and ppt levels) contribute to the total characteristic tomato flavor. An increase in sugars (1-2%) contributes significantly to tomato fruit taste. However, because of energy reasons, an increase in fruit sugars is immediately compensated for by a decrease in yield. Our main objectives were to: (a) pinpoint and identify the major impact aroma components of fresh tomato; (b) study the genetic and environmental effects on fruit aroma; (c) determine precursors of appealing (flavors) and repelling (off-flavors) aroma compounds in tomato. Addition of saturated salts blocked all enzymatic activities prior to isolation of volatiles by dynamic and static headspace, using solvent assisted flavor evaporation (SAFE) and solid phase micro-extraction (SPME) from highly favored (FA-612 and FA-624) and less preferred (R 144 and R 175) tomato genotypes. Impact aroma components were determined by gas chromatography-olfactometry (GC-O), gas chromatography-mass spectrometry (GC- MS) and aroma extract dilution analysis (AEDA). The potent odorant (Z)-1,5-octadien-3-one, was identified for the first time in fresh tomato. From the ca. 400 volatile compounds in the headspace of fresh tomato, the following compounds are proposed to be impact aroma compounds: (Z)-3-hexenal, hexanal, 1-penten-3-one, 2-phenylethanol, (E)-2-hexenal, phenyl acetaldehyde, b-ionone, b-damascenone, 4-hydroxy-2,5-dimethyl-3-(2H)-furanone (FuraneolR), (Z)-l,5-octadien-3-one, methional, 1-octen-3-one, guaiacol, (E,E)- and (E,Z)- 2,4-decadienal and trans- and cis-4,5-EPOXY -(E)-2-decenal. This confirms the initial hypothesis that only a small number of volatiles actually contribute to the sensation of fruit aroma. Tomato matrix significantly affected the volatility of certain impact aroma components and thus led to the conclusion that direct analysis of molecules in the headspace . may best represent access of tomato volatiles to the olfactory receptors. Significant differences in certain odorants were found between preferred and less-preferred cultivars. Higher consumer preference was correlated with higher concentrations of the following odorants: l-penten-3-one, (Z)-3-hexenal, (E,E)- and (E,Z)-2,4-decadienal and especially Furaneol, whereas lower consumer preference was associated with higher concentrations of methional, 3-methylbutyric acid, phenylacetaldehyde, 2-phenylethanol, and 2-isobutylthiazole. Among environmental factors (salinity, N source, growth temperature), temperature had significant effects on the content of selected aroma compounds (e.g., 3-methylbutanal, 1- penten-3-one, hexanal, (Z)-3-hexenal, (E)-2-hexenal, 2-isobutylthiazole, 6-methyl-5-hepten- 2-one, 1-octen-3-one, methional, 2-phenylethanal, phenyl acetaldehyde, and eugenol) in fresh tomatoes. Salt stress (20 mM NaCl) increased the content of odorants such as (Z)-3-hexenal, 2-phenylethanol and 3-methylbutanal in the R-144 cultivar whereas salinity had minor effects on 1-pentene-3-one, 2-isobutylthiazole and b-ionone. This fundamental knowledge obtained by comprehensive investigation, using modem chemical, sensory and agrotechnical methodology will assist future attempts to genetically modify the concentrations of key odorants in fresh tomatoes, and thus keep the tomato production of Israel and the USA competitive on the world market.
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