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Effect of intracanal medications on the interfacial properties of reparative cements
Pereira, Andrea Cardoso,Pallone, Mariana Valerio,Marciano, Marina Angelica,Cortellazzi, Karine Laura,Frozoni, Marcos,Gomes, Brenda P.F.A.,de Almeida, Jose Flavio Affonso,de Jesus Soares, Adriana The Korean Academy of Conservative Dentistry 2019 Restorative Dentistry & Endodontics Vol.44 No.2
Objectives: The purpose of the present study was to evaluate the effect of calcium hydroxide with 2% chlorhexidine gel (HCX) or distilled water (HCA) compared to triple antibiotic paste (TAP) on push-out bond strength and the cement/dentin interface in canals sealed with White MTA Angelus (WMTA) or Biodentine (BD). Materials and Methods: A total of 70 extracted human lower premolars were endodontically prepared and randomly divided into 4 groups according to the intracanal medication, as follows: group 1, HCX; group 2, TAP; group 3, HCA; and group 4, control (without intracanal medication). After 7 days, the medications were removed and the cervical third of the specimens was sectioned into five 1-mm sections. The sections were then sealed with WMTA or BD as a reparative material. After 7 days in 100% humidity, a push-out bond strength test was performed. Elemental analysis was performed at the interface, using energy-dispersive spectroscopy. The data were statistically analyzed using analysis of variance and the Tukey test (p < 0.05). Results: BD presented a higher bond strength than WMTA (p < 0.05). BD or WMTA in canals treated with calcium hydroxide intracanal medications had the highest bond strength values, with a statistically significant difference compared to TAP in the WMTA group (p < 0.05). There were small amounts of phosphorus in samples exposed to triple antibiotic paste, regardless of the coronal sealing. Conclusions: The use of intracanal medications did not affect the bond strength of WMTA and BD, except when TAP was used with WMTA.
Caroline Dani,Matheus A.B. Pasquali,Marcos R. Oliveira,Fernanda M. Umezu,Mirian Salvador,Joao A.P. Henriques,Jose C.F. Moreira 한국식품영양과학회 2008 Journal of medicinal food Vol.11 No.1
The antioxidant properties of purple grape juice, organic and conventional, in brain tissues are not well known.In this study our objective was to evaluate the antioxidant activity in substantia nigra and striatum of rats chronically treatedwith organic or conventional purple grape juice and to correlate the results obtained with the polyphenol content (total polyphe-nolic content, resveratrol, and anthocyanins [malvidin, delphinidin, peonidin, and cyanidin]). We observed that CCl4 damagedecreased significantly in the grape juice-treated groups when compared with the control group. In the grape juice-treatedgroups we further observed a decrease of lipid (thiobarbituric acid-reactive substances assay) and protein (carbonyl) peroxi-dation, as well as a significant antioxidant protection through the increase of enzyme activity. Antioxidant activities were sig-nificantly correlated with polyphenol content. These findings demonstrated that both grape juices have potent antioxidant prop-erties and these activities could be at least attributed to the high phenolic content present in these juices.
Ian Alfaro,Lorena Molina,Pablo Gonzalez,Jose Gaete,Fernando Valenzuela,Jose F. Marco,Cesar Saez,Carlos Basualto 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.78 No.-
The aim of this work is to produce a superparamagnetic core-shell adsorbent material composed ofmagnetite nanoparticles coated with a silica layer and functionalized with betaine for applicationsassociated with the recovery of molybdenum and rhenium anions from highly acidic aqueous solutions. The resulting nanoparticles with a quaternary amine surface were predominantly spherical with averagediameters of 14.3 1.7 nm. Adsorption experiments at pH values of 1-2 confirmed that it was possible touptake molybdate and perrhenate species using this adsorbent nanomaterial, achieving maximumloading capacities of 15 mg/gMNP for Mo and 19 mg/gMNP for Re.
Intake of Purple Grape Juice as a Hepatoprotective Agent in Wistar Rats
Caroline Dani,Livia S. Oliboni,Matheus A.B. Pasquali,Marcos R. Oliveira,Fernanda M. Umezu,Mirian Salvador,Jose C.F. Moreira,Joao A.P. Henriques 한국식품영양과학회 2008 Journal of medicinal food Vol.11 No.1
Grape juice is a source of polyphenols, as catechin, anthocyanidins, resveratrol, and others. Some health benefits have been attributed to these compounds (e.g., antioxidant and antitumorigenic properties). In this study, we investigated the possible antioxidant activity of two different grape juices: organic purple grape juice and conventional purple grape juice. The antioxidant activity of both grape juices was evaluated by an animal model of three groups: control and organic and conventional juices. After 30 days, all animals were sacrificed, and blood and liver were collected to evaluate lipid peroxidation level (thiobarbituric acid-reactive substances [TBARS] assay), protein oxidative level (carbonyl assay), and catalase (CAT) and superoxide dismutase (SOD) activities. The group treated with organic grape juice showed the highest SOD and CAT activities in both plasma and liver when compared with the conventional and control groups (P .05). In plasma, we observed a positive correlation among SOD and CAT activities, resveratrol, and all anthocyanin contents, suggesting that these polyphenols may be, at least in part, responsible for this increased antioxidant defense. The grape juices were capable of reducing carbonyl and lipid peroxidation levels in plasma and liver. However, in plasma, the organic group showed lower carbonyl and TBARS levels when compared to the conventional grape juice group (P .05). Our findings suggest that the intake of purple grape juice, especially of organic juice, induces a better antioxidant capacity when compared to conventional juice and that this may be an important issue for further investigations in the area of biochemical functional foods.