Fungicide Activity of Thymus mastichina and Mentha rotundifolia in Plants In Vitro

Fernanda Leal,Ana Cla´udia Coelho,Tatiana Soriano,Carina Alves,Manuela Matos 한국식품영양과학회 2013 Journal of medicinal food Vol.16 No.4

The Strategic Role of Charm, Simpatia and Jeitinho in Brazilian Society

Fernanda Duarte 한국라틴아메리카학회 2011 라틴아메리카연구 Vol.24 No.3

Charm is the power to attract, please and fascinate which creates a positive rapport in social interaction. In Brazilian society, charm is a highly valued and actively cultivated personal attribute. It is inextricably intertwined with simpatia, or the ability to empathise and strive for harmony in interpersonal relations. Based on a qualitative study carried out in Brazil, this paper explores the strategic role of charm and simpatia, and their links with another personalist Brazilian social practice known as ‘the jeitinho’. It also examines the links of these practices with an imagined ‘Brazilian identity’. The findings reveal that Brazilians generally take for granted the use of charm, simpatia and the jeitinho to foster or enhance personal connections that can be advantageous to the people who use them. While these practices are not uniquely Brazilian, there is evidence that Brazilians attribute a particular significance to them in their daily routines.

Saccharomyces boulardii: Optimization of simultaneous saccharification and fermentation of cell production in organic and conventional apple substrate pulp

Fernanda Silva Farinazzo,Eduardo Silva Farinazzo,Wilma Aparecida Spinosa,Sandra Garcia 한국식품과학회 2017 Food Science and Biotechnology Vol.26 No.4

A face-centered factorial design was used to study the influence of temperature, cellulase, and pectinase concentration on the production of Saccharomyces boulardii cells during simultaneous saccharification and fermentation of organic and conventional apple substrate pulp. The effects of the variables fermentation temperature (25–35 C), pectinase concentration (5–25 lL/100 g), and cellulase concentration (4–8 lL/100 g) were analyzed by multiple regression and polynomial models of second order, providing the ideal conditions for yeast cultivation. Cellular production of apple substrates was expressed in log CFU/mL. The optimum condition for temperature was 27.5 C, and 20 and 5 lL/100 g for pectinase and 8 and 7 lL/100 g for cellulase concentrations for organic and conventional apple pulp, respectively. The observed viability values were in agreement with the predicted values of 8.352 log CFU/mL (organic) and 8.317 log CFU/mL (conventional) apple pulps, thus proving the effectiveness of the models.

Experimental Behaviour of the Reverse Channel Joint Component at Elevated and Ambient Temperatures

Fernanda Lopes,Aldina Santiago,Luís Simões da Silva,Tim Heistermann,Milan Veljkovic,José Guilherme da Silva 한국강구조학회 2013 International Journal of Steel Structures Vol.13 No.3

The reverse channel connection appears to have the best combination of desirable features under fire loading: moderate construction cost, ability to develop catenary action and extremely high ductility through deformation of the web channel (Ding and Wang, 2007). This paper presents the results of an experimental investigation of a reverse channel component conducted at the University of Coimbra as part of the European RFCS COMPFIRE Project, the main focus of which is to characterise the behaviour of steel joints that connect steel beams to concrete-filled tubular columns under natural fire loading. A series of tensile and compressive tests at ambient and elevated temperatures was conducted. The purposes of the experimental tests were to characterise the strength, stiffness and ductility of this joint component and to establish a relationship between force,displacement and temperature.

Extracellular Tannase from Aspergillus ochraceus: Influence of the Culture Conditions on Biofilm Formation, Enzyme Production, and Application

( Fernanda Mansano Aracri ),( Rayza Morganna Farias Cavalcanti ),( Luis Henrique Souza Guimaraes ) 한국미생물 · 생명공학회 2019 Journal of microbiology and biotechnology Vol.29 No.11

Aspergillus ochraceus biofilm, developed on an inert support, can produce tannase in Khanna medium containing 1.5% (w/v) tannic acid as the carbon source, at an initial pH of 5.0, for 72 h at 28ºC. Addition of 0.1% (w/v) yeast extract increased enzyme production. The enzyme in the crude filtrate exhibited the highest activity at 30ºC and pH 6.0. At 50ºC, the half-life was 60 min and 260 min at pH 6.0. In general, addition of detergents and surfactants did not affect tannase activity significantly. Tannase has potential applications in various biotechnological processes such as the production of propyl gallate and in the treatment of tannin-rich effluents. The content of tannins and total phenolic compounds in effluents from leather treatment was reduced by 56-83% and 47-64%, respectively, after 2 h of enzyme treatment. The content of tannins and total phenolic compounds in the sorghum flour treated for 120 h with tannase were reduced by 61% and 17%, respectively. Interestingly, the same A. ochraceus biofilm was able to produce tannase for three sequential fermentative process. In conclusion, fungal biofilm is an interesting alternative to produce high levels of tannase with biotechnological potential to be applied in different industrial sectors.

Antihyperglycemic Effect of Quercetin in Ovariectomized Rats Treated with Tamoxifen

Fernanda Coleraus Silva,Isabella Calvo Bramatti,Adrieli Gorlin Toledo,Fernando Marques Salles,Ana Maria Itinose,Carla Brugin Marek 한국식품영양과학회 2017 Journal of medicinal food Vol.20 No.3

Tamoxifen is effective in breast cancer therapy in postmenopausal women; however, it causes adverse effects that alter the glycolytic pathway and induce hyperglycemia. Quercetin, a flavonoid with antioxidant potential, inhibits butyrylcholinesterase (BuChE), which is positively associated with hyperglycemia. Therefore, this study investigated the effect of quercetin on tamoxifen-induced hyperglycemia, using BuChE activity as a bioindicator in adult ovariectomized Wistar rats. The ovariectomized rats were treated orally for 14 days with different concentrations of quercetin (2.5, 7.5, 22.5, and 67.5 mg.kg−1 b.w.) and tamoxifen (5 mg.kg−1 b.w.). Subsequently, they were euthanized; blood and tissue samples were collected. The following biochemical parameters were analyzed: plasma glucose levels and BuChE activity in the plasma, liver, intestine, and adipose tissue. The most effective dose of quercetin in reducing hyperglycemia was 22.5 mg.kg−1 b.w. (Que/TAM 4.5/1, P < .00000), although the doses of 2.5 (Que/TAM 0.5/1, P < .05) and 7.5 mg.kg−1 b.w. (Que/TAM 1.5/1, P < .05) were also effective. The BuChE activity decreased in the intestine at all tested doses of quercetin coadministered with tamoxifen (P < .01); however, in adipose tissue, there was a biphasic activity with a decrease (P < .05) and increase (P < .05) in activity at doses of 7.5 and 22.5 mg.kg−1 b.w. of quercetin, respectively. However, the correlation between BuChE and glucose levels was not significant (P > .05). In summary, the findings of the present study suggest that quercetin when associated with tamoxifen decreases in plasma glucose levels. Furthermore, in these cases, BuChE should not be used as an indicator of hyperglycemia.

Detection of furcation involvement using periapical radiography and 2 cone-beam computed tomography imaging protocols with and without a metallic post: An animal study

Fernanda Cristina Sales Salineiro,Ivan Onone Gialain,Solange Kobayashi-Velasco,Claudio Mendes Pannuti,Marcelo Gusmão Paraiso Cavalcanti 대한영상치의학회 2017 Imaging Science in Dentistry Vol.47 No.1

Purpose: The purpose of this study was to assess the accuracy, sensitivity, and specificity of the diagnosis of incipient furcation involvement with periapical radiography (PR) and 2 cone-beam computed tomography (CBCT) imaging protocols, and to test metal artifact interference. Materials and Methods: Mandibular second molars in 10 macerated pig mandibles were divided into those that showed no furcation involvement and those with lesions in the furcation area. Exams using PR and 2 different CBCT imaging protocols were performed with and without a metallic post. Each image was analyzed twice by 2 observers who rated the absence or presence of furcation involvement according to a 5-point scale. Receiver operating characteristic (ROC) curves were used to evaluate the accuracy, sensitivity, and specificity of the observations. Results: The accuracy of the CBCT imaging protocols ranged from 67.5% to 82.5% in the images obtained with a metallic post and from 72.5% to 80% in those without a metallic post. The accuracy of PR ranged from 37.5% to 55% in the images with a metallic post and from 42.5% to 62.5% in those without a metallic post. The area under the ROC curve values for the CBCT imaging protocols ranged from 0.813 to 0.802, and for PR ranged from 0.503 to 0.448. Conclusion: Both CBCT imaging protocols showed higher accuracy, sensitivity, and specificity than PR in the detection of incipient furcation involvement. Based on these results, CBCT may be considered a reliable tool for detecting incipient furcation involvement following a clinical periodontal exam, even in the presence of a metallic post.

In vivo assessment of accuracy of Propex II, Root ZX II, and radiographic measurements for location of the major foramen

Fernanda Garcia Tampelini,Marcelo Santos Coelho,Marcos de Azevêdo Rios,Carlos Eduardo Fontana,Daniel Guimarães Pedro Rocha,Sergio Luiz Pinheiro,Carlos Eduardo da Silveira Bueno 대한치과보존학회 2017 Restorative Dentistry & Endodontics Vol.42 No.3

Objectives: The aim of this in vivo study was to assess the accuracy of 2 third-generation electronic apex locators (EALs), Propex II (Dentsply Maillefer) and Root ZX II (J. Morita), and radiographic technique for locating the major foramen (MF). Materials and Methods: Thirty-two premolars with single canals that required extraction were included. Following anesthesia, access, and initial canal preparation with size 10 and 15 K-flex files and SX and S1 rotary ProTaper files, the canals were irrigated with 2.5% sodium hypochlorite. The length of the root canal was verified 3 times for each tooth using the 2 apex locators and once using the radiographic technique. Teeth were extracted and the actual WL was determined using size 15 K-files under a × 25 magnification. The Biostat 4.0 program (AnalystSoft Inc.) was used for comparing the direct measurements with those obtained using radiographic technique and the apex locators. Pearson's correlation analysis and analysis of variance (ANOVA) were used for statistical analyses. Results: The measurements obtained using the visual method exhibited the strongest correlation with Root ZX II (r = 0.94), followed by Propex II (r = 0.90) and Ingle's technique (r = 0.81; p < 0.001). Descriptive statistics using ANOVA (Tukey's post hoc test) revealed significant differences between the radiographic measurements and both EALs measurements (p < 0.05). Conclusions: Both EALs presented similar accuracy that was higher than that of the radiographic measurements obtained with Ingle's technique. Our results suggest that the use of these EALs for MF location is more accurate than the use of radiographic measurements.

Influence of voxel size on cone-beam computed tomography-based detection of vertical root fractures in the presence of intracanal metallic posts

Fernanda Paula Yamamoto-Silva,Claudeir Felipe de Oliveira Siqueira,Maria Alves Garcia Santos Silva,Rodrigo Borges Fonseca,Ananda Amaral Santos,Carlos Estrela,Brunno Santos de Freitas Silva 대한영상치의학회 2018 Imaging Science in Dentistry Vol.48 No.3

Purpose: This study was performed to evaluate the influence of voxel size and the accuracy of 2 cone-beam computed tomography (CBCT) systems in the detection of vertical root fracture (VRF) in the presence of intracanal metallic posts. Materials and Methods: Thirty uniradicular extracted human teeth were selected and randomly divided into 2 groups (VRF group, n=15; and control group, n=15). The VRFs were induced by an Instron machine, and metallic posts were placed in both groups. The scans were acquired by CBCT with 4 different voxel sizes: 0.1 mm and 0.16 mm (for the Eagle 3D V-Beam system) and 0.125 mm and 0.2 mm (for the i-CAT system) (protocols 1, 2, 3, and 4, respectively). Interobserver and intraobserver agreement was assessed using the Cohen kappa test. Sensitivity and specificity were evaluated and receiver operating characteristic analysis was performed. Results: The intraobserver coefficients indicated good (0.71) to very good (0.83) agreement, and the interobserver coefficients indicated moderate (0.57) to very good (0.80) agreement. In respect to the relationship between sensitivity and specificity, a statistically significant difference was found between protocols 1 (positive predictive value: 0.710, negative predictive value: 0.724) and 3 (positive predictive value: 0.727, negative predictive value: 0.632) (P<.05). The least interference due to artifact formation was observed using protocol 2. Conclusion: Protocols with a smaller voxel size and field of view seemed to favor the detection of VRF in teeth with intracanal metallic posts.

Effects of a bleaching agent on properties of commercial glass-ionomer cements

Fernanda Lúcia Lago de Camargo,Ailla Carla Lancellotti,Adriano Fonseca de Lima,Vinícius Rangel Geraldo Martins,Luciano de Souza Gonçalves 대한치과보존학회 2018 Restorative Dentistry & Endodontics Vol.43 No.3

Objectives: This study evaluated the effects of a bleaching agent on the composition, mechanical properties, and surface topography of 6 conventional glass-ionomer cements (GICs) and one resin-modified GIC. Materials and Methods: For 3 days, the specimens were subjected to three 20-minute applications of a 37% H2O2-based bleaching agent and evaluated for water uptake (WTK), weight loss (WL), compressive strength (CS), and Knoop hardness number (KHN). Changes in surface topography and chemical element distribution were also analyzed by energy-dispersive X-ray spectroscopy and scanning electron microscopy. For statistical evaluation, the Kruskal-Wallis and Wilcoxon paired tests (ɑ = 0.05) were used to evaluate WTK and WL. CS specimens were subjected to 2-way analysis of variance (ANOVA) and the Tukey post hoc test (α = 0.05), and KH was evaluated by one-way ANOVA, the Holm-Sidak post hoc test (ɑ = 0.05), and the t-test for independent samples (ɑ = 0.05). Results: The bleaching agent increased the WTK of Maxxion R, but did not affect the WL of any GICs. It had various effects on the CS, KHN, surface topography, and the chemical element distribution of the GICs. Conclusions: The bleaching agent with 37% H2O2 affected the mechanical and surface properties of GICs. The extent of the changes seemed to be dependent on exposure time and cement composition.