Substantivity of three concentrations of tetraclean in bovine root dentin.

In the present study, the residual antibacterial activity, or substantivity, of three concentrations of Tetraclean (Ogna Laboratori Farmaceutici, Muggiò, Italy) was assessed in bovine root dentin in vitro. One hundred ten dentin tubes prepared from bovine incisor teeth were infected in vitro for 14 days with Enterococcus faecalis. Thereafter, the specimens were divided into five groups as follows: 100% Tetraclean, 10% Tetraclean, 1% Tetraclean, sterile dentin tubes (negative control), and infected dentin tubes (positive control).

A novel non-linear recursive filter design for extracting high rate pulse features in nuclear medicine imaging and spectroscopy.

Applications in imaging and spectroscopy rely on pulse processing methods for appropriate data generation. Often, the particular method utilized does not highly impact data quality, whereas in some scenarios, such as in the presence of high count rates or high frequency pulses, this issue merits extra consideration. In the present study, a new approach for pulse processing in nuclear medicine imaging and spectroscopy is introduced and evaluated.

Five-year follow-up of the local autologous transplantation of CD133+ enriched bone marrow cells in patients with myocardial infarction.

Background: The implantation of a CD133+ bone marrow cell population into an ischemic myocardium has emerged as a promising therapeutic modality for myocardial regeneration and restoration of ventricular contractility. While previous studies have documented the short-term safety and efficacy of CD133+ cell transplantation in patients with acute myocardial infarction, there are few reports of long-term follow-up results. Here, we present the results of long-term follow-up of our acute myocardial infarction patients who were treated with intramyocardial injection of CD133+ cells after coronary bypass graft.

Helicobacter species in the atherosclerotic plaques of patients with coronary artery disease.

Introduction: Several epidemiological studies have proposed an association between Helicobacter pylori infection and coronary artery disease. In the current study, we aimed to evaluate the prevalence and relevance of H. pylori infection, using polymerase chain reaction (PCR) methods, in the coronary arterial wall of Iranian patients who have already undergone coronary bypass grafting (CABG).

Health research priority setting in Iran: Introduction to a bottom up approach.

Background: Priority setting is one of the major issues in the health research system and no health system can afford to pay for every research they want to do, particularly in developing countries, so we decided to set the national main areas of the health research priorities.

Methods: In this study, according to Essential National Health Research (ENHR) strategy and with cooperation of all the Iranian universities of medical sciences and other stakeholders, the national health research priorities were extracted.

Results: The number of research priorities collected from the universities of medical sciences was 6723.

Accurate estimation of Brillouin frequency shift in Brillouin optical time domain analysis sensors using cross correlation.

Current methods of estimating the Brillouin frequency shift in Brillouin optical time domain analysis sensors are based on curve-fitting techniques. These techniques apply the same weight to all portions of the curve and dutifully fit into the peak and noisy ends of the curve. This makes them very sensitive to noise, initialization of fitting parameters, symmetry, and start and stop frequencies.

Coincidence of free-floating thrombus in the aortic arch, severe mitral stenosis, and left atrial appendage clot.

We describe the surgical management of a free-floating thrombus in the aortic arch in a patient with severe mitral stenosis, a left atrial appendage (LAA) clot, and an iliac artery thrombus. A 60-year-old woman complaining of dyspnea and pain in her right leg was referred to our multidisciplinary clinic. After a brief history was taken, an electrocardiography evaluation showed atrial fibrillation.

Synthesis, cytotoxicity, and QSAR study of new aza-cyclopenta[b]fluorene-1,9-dione derivatives.

Thirty novel derivatives of aza-cyclopenta[b]fluorene-1,9-dione were synthesized, and their cytotoxic activities were tested against HeLa, LS180, MCF-7, and Raji cancer cell lines by MTT assay. Two derivatives containing nitrofuryl moiety, including 10-(5-nitro-furan-2-yl)-2,3-dihydro-4-aza-cyclopenta[b]fluorene-1,9-dione (IC(50) range: 5.7-13.

Reducing perineal trauma through perineal massage with vaseline in second stage of labor.

Purpose: Maintaining an intact perineum is a highly regarded aim in delivery procedures today. Since perineal massage is a common practice during delivery, the present study aims to investigate the effect of perineal massage with Vaseline on perineal trauma (rate of episiotomy procedures and perineal tears).

Method: Ninety primiparous women (aged between 18 and 30 years with gestational age of 38-42 weeks) were selected sequentially in Tehran in 2009.

Communication barriers to patient education in cardiac inpatient care: a qualitative study of multiple perspectives.

Growing evidence in a variety of health-care settings supports the need to strengthen nurse-physician communication and interprofessional collaboration to optimize patient-health outcomes. The objective of this study is to explore communication barriers from the perspective of nurses themselves, as well as physicians, patients and families in a hospital-based cardiac care setting. Qualitative analysis of individual interviews with 35 participants was taken in two hospitals in Tehran, Iran.

Tandem use of solid-phase extraction and dispersive liquid-liquid microextraction for the determination of mononitrotoluenes in aquatic environment.

Solid-phase extraction (SPE) in tandem with dispersive liquid-liquid microextraction (DLLME) has been developed for the determination of mononitrotoluenes (MNTs) in several aquatic samples using gas chromatography-flame ionization (GC-FID) detection system. In the hyphenated SPE-DLLME, initially MNTs were extracted from a large volume of aqueous samples (100 mL) into a 500-mg octadecyl silane (C(18)) sorbent. After the elution of analytes from the sorbent with acetonitrile, the obtained solution was put under the DLLME procedure, so that the extra preconcentration factors could be achieved.

Glutathione-S-transferase subtypes α and π as a tool to predict and monitor graft failure or regeneration in a pilot study of living donor liver transplantation.

Objective: Glutathione-S-transferase (GST) subtype α and π are differentially expressed in adult liver tissue. Objective of the study was if GST α and π may serve as predictive markers for liver surgery, especially transplantations.

Methods: 13 patients receiving living donor liver transplantation (LDLT) and their corresponding donors were analyzed for standard serum parameters (ALT, AST, γGT, bilirubin) as well as GST-α and -π before LDLT and daily for 10 days after LDLT.

Prediction of Primary Slow-Pathway Ablation Success Rate according to the Characteristics of Junctional Rhythm Developed during the Radiofrequency Catheter Ablation of Atrioventricular Nodal Reentrant Tachycardia.

Background: Nowadays, developed junctional rhythm (JR) that occurs during slow-pathway radiofrequency (RF) catheter ablation of atrioventricular nodal reentrant tachycardia (AVNRT) has been focused upon as a highly sensitive surrogate end point for successful radiofrequency ablation. This study was conducted to assess the relationship between the presence and pattern of developed JR during the RF ablation of AVNRT and a successful outcome.

Methods: Seventy-five patients aged between 14 and 88 who underwent slow-pathway RF ablation due to symptomatic AVNRT were enrolled into the study and received a total of 162 RF energy applications.

Effect of mungbean (Vigna radiate) living mulch on density and dry weight of weeds in corn (Zea mays) field.

Living mulch is a suitable solution for weeds ecological management and is considered as an effective method in decreasing of weeds density and dry weight. In order to evaluate of mungbean living mulch effect on density and dry weight of weeds in corn field, an experiment was conducted as a split plot based on randomized complete block design with four blocks in Research Field of Department of Agronomy, Karaj Branch, Islamic Azad University in 2010. Main plots were time of mungbean suppression with 2,4-D herbicide in four levels (4, 6, 8 and 10 leaves stages of corn) and control without weeding and sub plots were densities of mungbean in three levels (50%, 100% and 150% more than optimum density).

Quantitation of antioxidants in water samples using ionic liquid dispersive liquid-liquid microextraction followed by high-performance liquid chromatography-ultraviolet detection.

A simple and efficient method, ionic liquid-based dispersive liquid-liquid microextraction combined with high-performance liquid chromatography-ultraviolet detection (HPLC-UV), has been applied for the extraction and determination of some antioxidants (Irganox 1010, Irganox 1076 and Irgafos 168) in water samples. The microextraction efficiency factors were investigated and optimized: 1-hexyl-3-methylimidazolium hexafluorophosphate [C(6)MIM][PF(6)] (0.06 g) as extracting solvent, methanol (0.

Evaluation of occupational exposure to naturally occurring radioactive materials in the Iranian ceramics industry.

Zircon contains small amounts of uranium, thorium and radium in its crystalline structure. The ceramic industry is one of the major consumers of zirconium compounds that are used as an ingredient at ∼10-20 % by weight in glaze. In this study, seven different ceramic factories have been investigated regarding the presence of radioactive elements with focus on natural radioactivity.

The non-syndromic familial thoracic aortic aneurysms and dissections maps to 15q21 locus.

Background: Thoracic aortic aneurysms and dissections (TAAD) is a critical condition that often goes undiagnosed with fatal consequences. While majority of the cases are sporadic, more than 20% are inherited as a single gene disorder. The most common familial TAA is Marfan syndrome (MFS), which is primarily caused by mutations in fibrillin-1 (FBN1) gene.

Enhancing international collaboration among early career researchers.

Objective: The European Association of Communication in Healthcare (EACH) Early Career Researchers Network (ECRN) aims are to (1) promote international collaboration among young investigators and (2) provide a support network for future innovative communication research projects. In October 2009, Miami, USA at a workshop facilitated by the ECRN at the International Conference on Communication in Healthcare (ICCH) hosted by the American Academy of Communication in Healthcare we explored common facilitators and challenges faced by early career researchers in health communication research.

Methods: Attendees introduced themselves, their research area(s) of interest, and listed one facilitator and one barrier for their career development.

Adults with auditory neuropathy: comparison of auditory steady-state response and pure-tone audiometry.

Background: The relation between the auditory steady-state response (ASSR) and behavioral audiometric thresholds requires further clarification in the case of adults with auditory neuropathy/auditory dys-synchrony (AN/AD).

Purpose: The aim of this study was to compare pure-tone audiometric threshold (PTAT) and ASSR in adults with AN/AD.

Study Sample: Sixteen adult participants (32 ears) with AN/AD, ranging in age from 14 to 34 years.

Effects of state-level public spending on health on the mortality probability in India.

This study uses the second National Family Health Survey of India to estimate the effect of state-level public health spending on mortality across all age groups, controlling for individual, household, and state-level covariates. We use a state's gross fiscal deficit as an instrument for its health spending. Our study shows a 10% increase in public spending on health in India decreases the average probability of death by about 2%, with effects mainly on the young, the elderly, and women.

Bioprosthetic tricuspid valve dehiscence in a patient with Ebstein anomaly.

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