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biphenyl/càries dental
L'enllaç es desa al porta-retalls
Pàgina 1 des de 115 resultats
Dental caries in Faroese children exposed to polychlorinated biphenyls.
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The effects of exposure to polychlorinated biphenyls (PCBs) on dental caries of first permanent molars in children in the Faroe Islands, where the population is exposed to PCBs in their traditional diet, were evaluated. This study was part of a cohort study aimed at determining developmental risks
Frozen Dissymmetric Cavities in Resorcinarene-Based Coordination Capsules.
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By introducing slight structural modifications to a D4 -symmetric coordination capsule, we succeeded in isolating the nearly enantiopure capsules (P)- and (M)-2 a(BF4 )4 . Chiral guest, dibenzyl 4,4'-diacetoxy-6,6'-dimethyl-[1,1'-biphenyl]-2,2'-dicarboxylate (3) was encapsulated within the
Structures and anion-binding properties of M4L6 tetrahedral cage complexes with large central cavities.
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Reaction of the bis-bidentate bridging ligand L(3), in which two bidentate chelating 3(2-pyridyl)pyrazole units are separated by a 3,3'-biphenyl spacer, with Co(II) salts affords tetranuclear cage complexes of composition [Co(4)(L(3))(6)]X(8)(X =[BF(4)](-), [ClO(4)](-), [PF(6)](-) or I(-)) in which
Aroclor 1254 inhibits the chemiluminescence response of peritoneal cavity cells from sharpsnout sea bream (Diplodus puntazzo).
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Chronic exposure to polychlorinated biphenyls (PCBs) affect the immune system of fish and could lead to a decreased disease resistance. The effects of Aroclor 1254, PCB mixtures, on the Diplodus puntazzo innate immunity were examined by assaying the zymosan stimulated chemiluminescence response (CL)
[Phenomena of supramolecular assembly fluid room temperature phosphorescence (II)--effects of alcohols on room temperature phosphorescence of cyclodextrin/4-iodo-4'-ethyl-biphenyl/bromocyclohexane system].
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Beta-cyclodextrin( beta/-CD)can induce 4-iodo-4'-ethyl-biphenyl(IEBP)to emit room temperature phosphorescence(RTP) in the presence of bromocyclohexane (BCH). If butyl alcohol (BuOH) is presented as a fourth component at the same time, RTP intensity of the system is enhanced obviously. Effects of
Self-Assembled Boronic Ester Cavitand Capsules with Various Bis(catechol) Linkers: Cavity-Expanded and Chiral Capsules.
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Two molecules of cavitand tetraboronic acid and four molecules of various bis(catechol) linkers self-assemble into capsules through the formation of eight dynamic boronic ester bonds. Each capsule has a different cavity size depending on the linker used, and shows particular guest encapsulation
Cavity-shaped ligands: calix[4]arene-based monophosphanes for fast Suzuki-Miyaura cross-coupling.
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Five conical calix[4]arenes that have a PPh(2) group as the sole functional group anchored at their upper rim were assessed in palladium-catalysed cross-coupling reactions of phenylboronic acid with aryl halides (dioxane, 100 degrees C, NaH). With arylbromides, remarkably high activities were
Exploration of the binding of benzimidazole-biphenyl derivatives to hemoglobin using docking and molecular dynamics simulation.
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In this study, the binding of hemoglobin (Hb) with three benzimidazole-biphenyl derivatives (telmisartan (TST), candesartan (CST), and DB921) is investigated by molecular docking, molecular dynamics (MD) simulation, and binding free energy calculation. Results demonstrate that the three drugs locate
Distribution and elimination of a polychlorinated biphenyl after acute dietary exposure in yellow perch and rainbow trout.
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Distribution and elimination of a single polychlorinated biphenyl isomer (2,5,2',5'-tetrachloro[14C]biphenyl, 4-CB) were compared in a nonfatty fish (yellow perch) and a fatty fish (rainbow trout). Adult fish were exposed acutely to 4-CB (0.8 microgram/fish) by the oral or intraperitoneal route and
Enantiodifferentiation in the Photoisomerization of (Z,Z)-1,3-Cyclooctadiene in the Cavity of γ-Cyclodextrin-Curcubit[6]uril-Wheeled [4]Rotaxanes with an Encapsulated Photosensitizer.
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A biphenyl photosensitizer axle was implanted into the cavities of native and capped γ-cyclodextrins through rotaxanation using a cucubit[6]uril-templated azide-alkyne 1,3-dipolar cycloaddition, resulting in the construction of highly defined chiral binding/sensitizing sites. The orientation and
Structural insight into the expanded PCB-degrading abilities of a biphenyl dioxygenase obtained by directed evolution.
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The biphenyl dioxygenase of Burkholderia xenovorans LB400 is a multicomponent Rieske-type oxygenase that catalyzes the dihydroxylation of biphenyl and many polychlorinated biphenyls (PCBs). The structural bases for the substrate specificity of the enzyme's oxygenase component (BphAE(LB400)) are
A high-yield synthesis of [m]biphenyl-extended pillar[n]arenes for an efficient selective inclusion of toluene and m-xylene in the solid state.
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[m]Bp-ExPn with a rigid and nanometer-sized cavity, as an extended version of pillar[n]arene by replacing 1,4-dimethoxybenzene monomers with biphenyl entities, was synthesized for the first time. Intriguingly, toluene and m-xylene can be stably included within the cavity of [2]Bp-ExP6, which endows
Dietary effects of polychlorinated biphenyls on mink.
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Poisoning occurred in 32 mink fed diets containing meat from cows which had been fed a polychlorinated biphenyl (PCB), Aroclor 1254. No live kits were produced and all adult mink died during a 105 day period of feeding a ration containing 3.57 ppm of PCB. At a level of 0.64 ppm of PCB in ration one
A molecular dynamics study of the structure and evolution of the 4,4'-bis(diphenylhydroxymethyl)biphenyl/acetone host-guest system
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The 4,4'-bis(diphenylhydroxymethyl)biphenyl/acetone (DHMB-Ac) system was studied by NPT molecular dynamics (MD) calculations; the study was prompted by the availability of X-ray single-crystal diffraction and calorimetric data (L. Johnson, L. Nassimbeni, E. Weber and K. Skobridis, J. Chem. Soc.
Development of preneoplastic lesions in the liver and nasal epithelium of rats initiated with N-nitrosodimethylamine or N-nitrosopyrrolidine and promoted with polybrominated biphenyls.
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In rats, N-nitrosodimethylamine (NDMA) and N-nitrosopyrrolidine (NPYR) induce liver tumours and, to a lesser extent, nasal tumours. Polybrominated biphenyls (PBBs) are liver tumour promoters and are highly persistent in tissues of rats. To characterize the development of preneoplastic lesions in the
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