http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Elena Saraí Baena-Santillán,Javier Piloni-Martini,Eva María Santos-López,Carlos Alberto Gómez-Aldapa,Esmeralda Rangel-Vargas,Javier Castro-Rosas 한국식품영양과학회 2021 Journal of medicinal food Vol.24 No.1
To determine and compare the antimicrobial effect of Hibiscus sabdariffa calyx extracts, six types of commercial mouthwashes, and chlorhexidine on Streptococcus mutans, Streptococcus sanguinis, Capnocytophaga gingivalis, and Staphylococcus aureus. Two varieties of H. sabdariffa cultivated in Mexico were used. Aqueous, methanolic, ethanolic, acetonic, and ethyl acetate extracts were obtained from H. sabdariffa calyces. Six different types of mouthwash (Astringosol®, Colgate plax-ice-infinity®, Crest pro-health®, Dental max®, Equate®, and Listerine zero®) and chlorhexidine (0.12%) were purchased at a pharmacy. The antimicrobial activity of the H. sabdariffa calyx extracts, mouthwashes, and chlorhexidine was determined by the agar disc diffusion technique. The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of all solutions were determined by the broth dilution method and the pour plate technique, respectively. Also, the effect of H. sabdariffa extracts and chlorhexidine on permeability of the bacterial membrane was determined by the violet crystal assay. All H. sabdariffa calyx extracts and chlorhexidine showed antibacterial activity against all oral pathogenic bacteria. The mouthwashes showed lower antibacterial effect than H. sabdariffa extracts and chlorhexidine. Dental max showed no antibacterial effect. The MICs and MBCs, respectively, for H. sabdariffa extracts were between 5–20 and 10–20 mg/mL; and for chlorhexidine, between 3–4 and 3–5 mg/mL. For the Listerine®, the MIC and MBC values were between 20–25 and 25–33 mg/mL, respectively. The results of the crystal violet test indicate that H. sabdariffa calyx extracts and chlorhexidine alter the permeability of the bacterial membrane. All H. sabdariffa extracts and chlorhexidine showed significantly greater antimicrobial effect than mouthwashes. This is the first report in which the antimicrobial effect of the H. sabdariffa calyx extracts, mouthwashes, and chlorhexidine is compared.
Miranda, Alberto,Alba-Baena, Noe,McKay, Brian J.,Eskin, Dmitry G.,Ko, Se Hyun,Shin, J.S. Trans Tech Publications, Ltd. 2013 Materials science forum Vol.765 No.-
<P>This study investigates the effect of Cu-Carbon Nanotube (Cu-CNT´s) composite powders on the mechanical properties of an Al-Si9.5-Cu4-Fe1.3 wt.% (LM24) aluminium matrix composite (AMC). Carbon nanotubes (CNT’s) can exhibit exceptional mechanical properties, e.g. stiffness up to 1000 GPa and strength in the order of 100 GPa. In recent years there has been significant scientific interest in improving properties in conventional alloys, via fabricating CNT metal matrix composites in order to attempt to harness their extraordinary attributes. In this study mechanically alloyed Cu-CNTS powders were added to molten LM24. The melt was processed using ultrasonic cavitation and subsequently high pressure die casting to form as-cast tensile specimens. SEM results indicate that CNT’s can be successfully introduced into the melt using this method. Compared to the unreinforced alloy, the CNT additions resulted in an increment (~20±10 MPa) to both ultimate tensile strength and yield strength, with a corresponding decline (~1±0.5l %) in elongation. This observed increase in strengthening may be attributed to the CNT’s pinning and hindering both grain boundary and dislocation migration during applied loading. Interestingly, no significant difference in properties were found with an increase in the CNT content (from 0.05 to 0.1 wt.%) potentially indicating a saturation limit.</P>
Experimental Characterisation of a Biologically Inspired 3D Steering Needle
Christopher Burrows,Riccardo Secoli,Ferdinando Rodriguez y Baena 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
Percutaneous intervention is a popular minimally invasive surgical technique, as it offers many potential advantages for the patient. Research efforts to date have focussed on improving the accuracy and applicability of this procedure through robotic control, in particular with the application of needle steering systems. Previously, we demonstrated two-dimensional (2D) steering within gelatine, with a prototype of a novel biologically inspired multi-segment needle, the STING. Then, a novel ‘programmable bevel’ concept, where the steering angle of the needle is a function of the offset between segments, was used to control the trajectory taken within the steering plane. This paper presents our first attempt to demonstrate controllable three-dimensional (3D) steering with a new four-segment prototype of the STING. We show that an approximately linear relationship exists between segment offset and curvature of the tip path for a single leading segment, as well as for two segments which are moved forward of the others by an equal amount. This characterisation is then demonstrated with 3D open loop experiments, which show that the established behaviour is applicable for controlled 3D steering along eight principal directions.
Plant Cell and Signaling Symposium : Plant sugar sensing and signaling networks
( Jen Sheen ),( Filip Rolland ),( Wan Hsing Cheng ),( Shuichi Yanagisawa ),( Qi Hall ),( Elena Baena Gonzalez ),( Young Hee Cho ),( Sang Dong Yoo ),( Patricia Leon ),( Brandon Moore ),( Li Zhou ) 한국생화학분자생물학회 (구 한국생화학회) 2004 생화학분자생물학회 춘계학술발표논문집 Vol.2004 No.-
Jaqueline Costa Favaro,Omar Geha,Ricardo Danil Guiraldo,Murilo Baena Lopes,Andreza Maria Fábio Aranha,Sandrine Bittencourt Berger 대한치과보존학회 2019 Restorative Dentistry & Endodontics Vol.44 No.1
Objectives: The aim of the present study was to evaluate the effect of whitening mouth rinses alone and in combination with conventional whitening treatments on color, microhardness, and surface roughness changes in enamel specimens. Materials and Methods: A total of 108 enamel specimens were collected from human third molars and divided into 9 groups ( n = 12): 38% hydrogen peroxide (HP), 10% carbamide peroxide (CP), 38% HP + Listerine Whitening (LW), 10% CP + LW, 38% HP + Colgate Plax Whitening (CPW), 10% CP + CPW, LW, CPW, and the control group (CG). The initial color of the specimens was measured, followed by microhardness and roughness tests. Next, the samples were bleached, and their color, microhardness, and roughness were assessed. Data were analyzed through 2-way analysis of variance (ANOVA; microhardness and roughness) and 1-way ANOVA (color change), followed by the Tukey post hoc test. The Dunnett test was used to compare the roughness and microhardness data of the CG to those of the treated groups. Results: Statistically significant color change was observed in all groups compared to the CG. All groups, except the LW group, showed statistically significant decreases in microhardness. Roughness showed a statistically significant increase after the treatments, except for the 38% HP group. Conclusions: Whitening mouth rinses led to a whitening effect when they were used after conventional treatments; however, this process caused major changes on the surface of the enamel specimens.
Edwin David Morales-Álvarez,Claudia Marcela Rivera-Hoyos,Angélica María Baena-Moncada,Patricia Landázuri,Raúl A. Poutou-Piñales,Homero Sáenz-Suárez,Luis A. Barrera,Olga Y. Echeverri-Peña 한국미생물학회 2013 The journal of microbiology Vol.51 No.2
The sulfatase family involves a group of enzymes with a large degree of similarity. Until now, sixteen human sulfatases have been identified, most of them found in lysosomes. Human deficiency of sulfatases generates various genetic disorders characterized by abnormal accumulation of sulfated intermediate compounds. Mucopolysaccharidosis type II is characterized by the deficiency of iduronate 2-sulfate sulfatase (IDS), causing the lysosomal accumulation of heparan and dermatan sulfates. Currently, there are several cases of genetic diseases treated with enzyme replacement therapy, which have generated a great interest in the development of systems for recombinant protein expression. In this work we expressed the human recombinant IDS-Like enzyme (hrIDS-Like) in Escherichia coli DH5α. The enzyme concentration revealed by ELISA varied from 78.13 to 94.35 ng/ml and the specific activity varied from 34.20 to 25.97 nmol/h/mg. Western blotting done after affinity chromatography purification showed a single band of approximately 40 kDa, which was recognized by an IgY polyclonal antibody that was developed against the specific peptide of the native protein. Our 100 ml-shake-flask assays allowed us to improve the enzyme activity seven fold,compared to the E. coli JM109/pUC13-hrIDS-Like system. Additionally, the results obtained in the present study were equal to those obtained with the Pichia pastoris GS1115/pPIC-9-hrIDS-Like system (3 L bioreactor scale). The system used in this work (E. coli DH5α/pGEX-3X-hrIDS-Like)emerges as a strategy for improving protein expression and purification, aimed at recombinant protein chemical characterization,future laboratory assays for enzyme replacement therapy, and as new evidence of active putative sulfatase production in E. coli.
Favaro, Jaqueline Costa,Geha, Omar,Guiraldo, Ricardo Danil,Lopes, Murilo Baena,Aranha, Andreza Maria Fabio,Berger, Sandrine Bittencourt The Korean Academy of Conservative Dentistry 2019 Restorative Dentistry & Endodontics Vol.44 No.1
Objectives: The aim of the present study was to evaluate the effect of whitening mouth rinses alone and in combination with conventional whitening treatments on color, microhardness, and surface roughness changes in enamel specimens. Materials and Methods: A total of 108 enamel specimens were collected from human third molars and divided into 9 groups (n = 12): 38% hydrogen peroxide (HP), 10% carbamide peroxide (CP), 38% HP + Listerine Whitening (LW), 10% CP + LW, 38% HP + Colgate Plax Whitening (CPW), 10% CP + CPW, LW, CPW, and the control group (CG). The initial color of the specimens was measured, followed by microhardness and roughness tests. Next, the samples were bleached, and their color, microhardness, and roughness were assessed. Data were analyzed through 2-way analysis of variance (ANOVA; microhardness and roughness) and 1-way ANOVA (color change), followed by the Tukey post hoc test. The Dunnett test was used to compare the roughness and microhardness data of the CG to those of the treated groups. Results: Statistically significant color change was observed in all groups compared to the CG. All groups, except the LW group, showed statistically significant decreases in microhardness. Roughness showed a statistically significant increase after the treatments, except for the 38% HP group. Conclusions: Whitening mouth rinses led to a whitening effect when they were used after conventional treatments; however, this process caused major changes on the surface of the enamel specimens.
RUNX1 Dosage in Development and Cancer
Lie-a-ling, Michael,Mevel, Renaud,Patel, Rahima,Blyth, Karen,Baena, Esther,Kouskoff, Valerie,Lacaud, Georges Korean Society for Molecular and Cellular Biology 2020 Molecules and cells Vol.43 No.2
The transcription factor RUNX1 first came to prominence due to its involvement in the t(8;21) translocation in acute myeloid leukemia (AML). Since this discovery, RUNX1 has been shown to play important roles not only in leukemia but also in the ontogeny of the normal hematopoietic system. Although it is currently still challenging to fully assess the different parameters regulating RUNX1 dosage, it has become clear that the dose of RUNX1 can greatly affect both leukemia and normal hematopoietic development. It is also becoming evident that varying levels of RUNX1 expression can be used as markers of tumor progression not only in the hematopoietic system, but also in non-hematopoietic cancers. Here, we provide an overview of the current knowledge of the effects of RUNX1 dosage in normal development of both hematopoietic and epithelial tissues and their associated cancers.
Guerrero, Antonio,Garcia-Belmonte, Germà,Mora-Sero, Ivan,Bisquert, Juan,Kang, Yong Soo,Jacobsson, T. Jesper,Correa-Baena, Juan-Pablo,Hagfeldt, Anders American Chemical Society 2016 The Journal of Physical Chemistry Part C Vol.120 No.15
<P>Impedance spectroscopy offers access to all the different electronic and ionic processes taking place simultaneously in an operating solar cell. To date, its use on perovskite solar cells has been challenging because of the richness of the physical processes occurring within similar time domains. The aim of this work is to understand the general impedance response and propose a general equivalent circuit model that accounts for the different processes and gives access to quantitative analysis. When the electron-selective contacts and the thickness of the perovskite film are systematically modified, it is possible to distinguish between the characteristic impedance signals of the perovskite layer and those arising from the contacts. The study is carried out using mixed organic lead halogen perovskite (FA(0.85)MA(0.15)Pb(I0.85Br0.15)(3)) solar cells with three different electron-selective contacts: SnO2, TiO2, and Nb2O5. The contacts have been deposited by atomic layer deposition (ALD), which provides pinhole-free films and excellent thickness control in the absence of a mesoporous layer to simplify the impedance analysis. It was found that the interfacial impedance has a rich structure that reveals different capacitive processes, serial steps for electron extraction, and a prominent inductive loop related to negative capacitance at intermediate frequencies. Overall, the present report provides insights into the impedance response of perovskite solar cells which enable an understanding of the different electronic and ionic processes taking place during device operation.</P>
( Alvaro G. Morales Taboada ),( Jose Manuel Asencio Pascual ),( Pablo Lozano Lominchar ),( Jose Angel Lopez Baena ),( Enrique Velasco ),( Luis Rodriguez-bachiller ),( Benjamin Diaz Zorita ),( Arturo C 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1
Aims: To analyze the impact of multimodal treatment strategy with neoadjuvant chemotherapy and intraoperative radiation therapy (IORT), on overall median survival in patients with pancreatic cancer. Methods: We analyzed 128 patients, from 1995 to 2016, who underwent multimodal treatment with and without neoadjuvant chemotherapy, surgery and intraoperative radiation therapy (IORT). The patients were stratified in two groups based in multimodality therapy. The data analyses were carried out using the chi-squared test, and the median survival was estimated according to the Kaplan-Meier method. Results: The mean age was 65 years, 71 men (55%) and 58 women (45%), the mean follow-up was 32.5 months with a median of 15.5 months. 19.5% received complete treatment and 41 patients were also treated with IORT, 23 patients (56.1%) were treated as part of the multimodal treatment versus 18 (43.9%), P=<0.001). The overall survival was 57.90 +/- 12.59 months for the neoadjuvant treatment group compared to 39.05 +/- 6.76 months in the control group without neoadjuvant treatment, (P=0, 05). IORT vs Not IORT was 62.05 +/- 13.34 months VS 38.65 +/- 6.58 months, P=0.027 respectively. Conclusions: Neoadjuvant and local therapy with intraoperative radiation therapy (IORT) are feasible strategies and associated with a longer overall median survival.