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Isotropic shear bond strength behavior of superficial bovine dentin: A pilot study  [PDF]
Camila Sabatini, Sebastiano Andreana
Open Journal of Stomatology (OJST) , 2013, DOI: 10.4236/ojst.2013.31001
Abstract:

The aim of this pilot study was to evaluate the shear bond strength of superficial bovine incisor dentin in different crown regions. Bonding was performed to the incisal, middle and cervical thirds of superficial bovine coronal dentin (n = 20) with a two-step etch-and-rinse adhesive (Optibond Solo Plus) and resin composite (Z100). Shear bond strength was evaluated at 24 h and failure modes of representative specimens wereobserved with FE-SEM. Non-parametric Kruskal-Wallis test with a significance level of 0.05 was used for data analysis. Mean shear bond strength values for the incisal, middle, and cervical thirds were 36.9 (3.1), 42.6 (2.6), and 37.1 (2.1) respectively with no significant differences evidenced between the crown thirds (p = 0.19). Observation of the failure mode of representative specimens demonstrated that specimens with high bond strength values exhibited predominantly mixed-type failures whereas low strength specimens exhibited adhesive failures between the dentin and adhesive. The absence of significant differences in shear bond strength between crown thirds indicate that, regardless of tubule orientation, any crown region can be used when superficial bovine incisor dentin is used for shear bond strength testing.

Atracción de deyecciones de triatominos sobre Triatoma maculata y Panstrongylus rufotuberculatus, vectores del Chagas
Luis Eduardo Traviezo Valles,Ricardo Rodríguez,Andreana Brett,María E. Albarrán
Salud, Arte y Cuidado , 2009,
Abstract: We study the ability of being attracted towards the droppings of different species oftriatomines chip on two species of epidemiological importance, noting that 28% ofTriatoma maculata and 22% of Panstrongylus rufotuberculatus shown attraction totheir own feces or other species studied
Surface preparation and isotropic shear bond strength properties of superficial bovine dentin  [PDF]
Camila Sabatini, Sebastiano Andreana, Zhe Wu
Open Journal of Stomatology (OJST) , 2013, DOI: 10.4236/ojst.2013.34046
Abstract:

The effect of different types of surface preparation with SiC abrasive paper on the shear bond strength (SBS) of superficial bovine dentin obtained from the incisal, middle and cervical thirds were evaluated. Dentin substrates were obtained with twenty specimens for each locationgrit combination. Superficial dentin was exposed and prepared to 120-, 320-, or 600-grit SiC; the dentin surfaces were treated with Optibond Solo Plus (Kerr) and polymerized for 20 s. The specimens were placed in a jig, filled with resin composite Z100 (3M-ESPE), polymerized for 40 s according to manufacturer’s instructions, and stored for 24 h at 37℃ and 100% humidity. After 24 h, SBS was measured using a loading testing machine (Ul-tradent) and expressed in megapascals. A two-way ANOVA and Tukey test were used for data analysis. No statistically significant effect of the location (P = 0.254) or interaction grit-location (P = 0.629) were observed on SBS. Statistically significant effect of the grit on the SBS was detected (P < 0.001) with 320-grit being statistically different from 600-grit (P = 0.011) and 120-grit (P < 0.001). No significant differences were observed between 600-grit and 120-grit (P = 0.413). Regardless of the location, 320-grit consistently showed the lowest SBS indicating that different surface grit preparations have an effect on dentin SBS values.

OPPORTUNITIES FOR ANALYTICAL COMPARISON IN THE NATIONAL ECONOMIES OF BULGARIA AND ROMANIA
Andreana STOYKOVA-KANALIEVA
Scientific Annals of the Alexandru Ioan Cuza University of Iasi : Economic Sciences Series , 2010,
Abstract: In the current economic situation the comparison of the degree of economic development be-tween the countries in United Europe is becoming more up-to-date. New approaches and tools for such comparison are being developed.This article offers a possible approach, focusing on the statistic analysis of growth and differ-ences. It is based on the modification of this method of analysis, proposed by V. Tzonev and T. Kunaliev. The method has been adapted for the needs of international comparative analyses in order to compare the GVA growth (Gross Value Added) based on growth sources in R. Bulgaria and R. Romania for the period from 2002 to 2007. The adjusted method is (has been) applied in three directions of analysis, focusing on their cognitive values. This specific comparative study has taken them into consideration, interpreting in details the obtained results.
Vascular Functions and Brain Integrity in Midlife: Effects of Obesity and Metabolic Syndrome
Andreana P. Haley
Advances in Vascular Medicine , 2014, DOI: 10.1155/2014/653482
Abstract: Intact cognitive function is the best predictor of quality of life and functional ability in older age. Thus, preventing cognitive decline is central to any effort to guarantee successful aging for our growing population of elderly. The purpose of the work discussed in this outlook paper is to bridge knowledge from basic and clinical neuroscience with the aim of improving how we understand, predict, and treat age- and disease-related cognitive impairment. Over the past six years, our research team has focused on intermediate neuroimaging phenotypes of brain vulnerability in midlife and isolating the underlying physiological mechanisms. The ultimate goal of this work was to pave the road for the development of early interventions to enhance cognitive function and preserve brain integrity throughout the lifespan. 1. Introduction The most rapidly rising threat to brain health in US adults is the clustering of obesity, high blood pressure, elevated fasting glucose, and abnormal lipid metabolism in a single individual, a condition known as metabolic syndrome. A staggering 34–45% of US adults currently fulfill criteria for metabolic syndrome [1]. These numbers are alarming as metabolic syndrome is associated not only with increased risk for cardiovascular disease and diabetes [2], but also with current cognitive dysfunction and risk for future cognitive decline, over and above the detrimental effects of its components [3–10]. While we have some information about each of the disrupted peripheral physiological mechanisms in turn, very little is known about the central mechanisms that connect metabolic syndrome to brain health and cognition. The goal of our work over the past six years has been to explore the underlying neural mechanisms of midlife brain vulnerability related to peripheral vascular and metabolic disturbances, before clinically significant and permanent cognitive dysfunction has developed. Understanding the preclinical stages of disease has the enormous advantage of presenting opportunities for early intervention, a task with much higher prospect of success than attempting to restore lost function later in life. Early identification of brain vulnerability is crucial; yet it presents a significant challenge due to the low sensitivity of clinical paper-and-pencil measures of cognitive impairment and lack of norms for tests with higher ceiling performance values. Our team has endeavored to solve this problem through combining sophisticated behavioral analyses with modern neuroimaging techniques. 2. Early Markers of Brain Vulnerability As noted
Professionalism education of OB/GYN resident physicians: What makes a difference?  [PDF]
Brett Worly
Open Journal of Obstetrics and Gynecology (OJOG) , 2013, DOI: 10.4236/ojog.2013.31A026
Abstract:

Objective: The aim of this study was to evaluate the efficacy of a new Professionalism curriculum in an Obstetrics and Gynecology (OB/GYN) residency after introducing Narrative Medicine and Professional Development/Support Group (PDSG) programs. Methods: 32 OB/GYN residents participated in this IRB approved pilot study. Twenty residents were assessed with the Barry Challenges to Professionalism Questionnaire (Barry), the Jefferson Scale of Empathy-Physician Version (JSE), and the Jefferson Scale of Attitudes Toward Physician-Nurse Collaboration (JSAT) in August 2010, as controls. Five Narrative Medicine sessions and four PDSG sessions were then used from August 2010-May 2011, for resident physician professionalism education. Seventeen residents then underwent post-testing with the Barry, JSE, and JSAT in May 2011. Results: The pre-test/post-test Barry comparison showed an improvement in scores after introduction of the new Narrative Medicine and PDSG curriculum (7.6 +/- 2.1 versus 8.4 +/- 1.6; p = 0.10) though this was not statistically significant. Pre-test/post-test comparison of JSAT scores showed a statistically significant decline in collaboration (52.3 +/- 4.1 versus 49.7 +/- 3.7; p = 0.028) while JSE scores showed a downward trend in empathy (109.3 +/- 10.0 versus 104.8 +/- 9.2; p = 0.086). Conclusion: Narrative Medicine and PDSG small group sessions could be an effective component of OB/GYN resident physician Professionalism curriculum. This pilot project was underpowered, due to limited resources.

Corneal Transplant Infection due to Alternaria alternata: A Case Report
Vasileios Konidaris,Andreana Mersinoglou,Timoleon-Achilleas Vyzantiadis,Domniki Papadopoulou
Case Reports in Ophthalmological Medicine , 2013, DOI: 10.1155/2013/589620
Abstract:
Science review: The use of proton pump inhibitors for gastric acid suppression in critical illness
Stephen Brett
Critical Care , 2004, DOI: 10.1186/cc2980
Abstract: Stress-related mucosal damage (SRMD) is an erosive gastritis of unclear pathophysiology, which can occur rapidly after a severe insult such as trauma, surgery, sepsis or burns. SRMD is apparent in 75–100% of critically ill patients within 24 hours of admission to an intensive care unit (ICU) [1,2]. Clinically important bleeding, defined as macroscopic bleeding resulting in hemodynamic instability or the need for red blood cell transfusion, occurs as a result of SRMD in about 3.5% of ICU patients who are mechanically ventilated for 48 hours or more [3]. Along with mechanical ventilation, risk factors for clinically important bleeding from SRMD include coagulopathy, shock, severe burns, a history of gastrointestinal (GI) ulceration, and multiple organ failure [4,5]. Bleeding is associated with a 20–30% increase in absolute risk of mortality, and with an increase of 1–4 in relative risk [3]. In addition, it increases the demand on limited blood stocks and extends the length of ICU stay by about 4–8 days [3], thereby adding to overall management costs.To avert these consequences, prophylaxis has been recommended for all ICU patients at high risk of SRMD [4,5]. Stress ulcer prophylaxis is included in the care bundle for critically ill patients on mechanical ventilation recommended by the Institute for Healthcare Improvement and adopted by the National Health Service Modernization agency in the UK [6]. The Surviving Sepsis Campaign, an international initiative founded by the European Society of Intensive Care Medicine, the Society of Critical Care Medicine and the International Sepsis Forum, has also recommended that prophylaxis be a part of critical care [7]. Specific risk factors for SRMD include: mechanical ventilation (more than 48 hours), coagulopathy, neurosurgery, any kind of shock, respiratory failure, sepsis, polytrauma, tetraplegia, severe burns (more than 30%) and multiple organ failure [4,5]. Patients in the ICU with a history of gastric or duodenal ulceration
A bill of wron
Brett, Guy;
ARS (S?o Paulo) , 2009, DOI: 10.1590/S1678-53202009000100007
Abstract: the author discusses the procedures of accumulation and serialization on the production of brazilian artist jac leirner, focusing works from the late nineteen eighties, such as "os cem" the hundreds (1985-7), "pulm?o" lung (1987) and "primeiros erros" first errors.
Neutrino Beam Constraints on Flavor-Diagonal Lorentz Violation
Altschul, Brett
High Energy Physics - Phenomenology , 2013,
Abstract: Breaking of isotropy and Lorentz boost invariance in the dynamics of second-generation leptons would lead to direction-dependent changes in the lifetimes of charged pions. This would make the intensity of a neutrino beam produced via pion decay a function of the beam orientation. The experimental signature of this phenomenon--sidereal variations in the event rate at a downstream neutrino detector--has already been studied, in searches for Lorentz-violating neutrino oscillations. Existing analyses of MINOS near detector data can be used to constrain the flavor-diagonal Lorentz violation coefficients affecting muon neutrino speeds at roughly the 10^(-5) level.
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