396 research outputs found
Do consumer attitudes matter in capital markets? A study of mutual funds in Oman market
The financial sector particularly the mutual funds in Oman market have shown limited potential to attract consumers. Consumer attitudes towards financial investments have always been a challenge for the finance companies due to limited risk appetite of consumers which are largely attributed to both cognitive and affective components of attitude. Through a process of methodological triangulation data was collected from experts in the finance sector from a sample of 200 consumers. Pearson product moment correlation and standard multiple regressions through SPSS version 20 were used to study the hypothesized relationships in this study. This study throws light on critical variables that shape consumer attitudes towards mutual funds and recommends the scope for introducing new mutual funds which has significant implications on capital markets in Oman
BioNetGen 2.2: Advances in Rule-Based Modeling
BioNetGen is an open-source software package for rule-based modeling of
complex biochemical systems. Version 2.2 of the software introduces numerous
new features for both model specification and simulation. Here, we report on
these additions, discussing how they facilitate the construction, simulation,
and analysis of larger and more complex models than previously possible.Comment: 3 pages, 1 figure, 1 supplementary text file. Supplementary text
includes a brief discussion of the RK-PLA along with a performance analysis,
two tables listing all new actions/arguments added in BioNetGen 2.2, and the
"BioNetGen Quick Reference Guide". Accepted for publication in Bioinformatic
Haemogenic endocardium contributes to transient definitive haematopoiesis.
Haematopoietic cells arise from spatiotemporally restricted domains in the developing embryo. Although studies of non-mammalian animal and in vitro embryonic stem cell models suggest a close relationship among cardiac, endocardial and haematopoietic lineages, it remains unknown whether the mammalian heart tube serves as a haemogenic organ akin to the dorsal aorta. Here we examine the haemogenic activity of the developing endocardium. Mouse heart explants generate myeloid and erythroid colonies in the absence of circulation. Haemogenic activity arises from a subset of endocardial cells in the outflow cushion and atria earlier than in the aorta-gonad-mesonephros region, and is transient and definitive in nature. Interestingly, key cardiac transcription factors, Nkx2-5 and Isl1, are expressed in and required for the haemogenic population of the endocardium. Together, these data suggest that a subset of endocardial/endothelial cells serve as a de novo source for transient definitive haematopoietic progenitors
3D KINEMATIC AND KINETIC ANALYSES OF TWO METHODS FOR GRAB START TECHNIQUE
This study compared two swimming start techniques of GI (hands between the feet grab start technique) and GO (hands outside the feet) utilizing 3D simultaneous and synchronized kinematic and kinetic analysis. Eight experienced university swimmers were subjects of a series of specified trials. The comparison has consequently been made through evaluation of 46 variables obtained from force plate and motion analyzer. The results indicate that greater reaction force, resultant force in CM. and resultant moment about CM were produced in the GO than in GI. However, significantly higher values in reaction moment about horizontal axis and CM vertical coordinates were associated with GI. It has been shown that although GO will result in lower performance
Kappa-casein gene polymorphism in Holstein and Iranian native cattle by polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP)
Caseins amount to nearly 80% of the protein output in cow milk. Caseins are biologically important proteins and they are also a raw material for the cheese making industry. The aim of this study was to identify kappa-casein genotype in Holstein and Iranian native cattle. DNA was extracted from 457 blood samples of 247 Holstein and 210 native cattle for identification and genotyping of kappa-casein gene by polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) assay using HindIII and TaqI restriction endonucleases. The PCR product of the specific primer K-F and K-R gives the 379 bp specific band. Digestion of 379 bp fragment by restriction endonuclease HindIII generated two fragments of 156 and 223 bp. Result of the cut with this enzyme indicate there genotypes AA, AB and BB in the samples. Also, the amplified DNA (379 bp) from the samples remained undigested by TaqI restriction enzyme. These findings suggest that BB genotype could be a good factor for increase of fat and protein content of milk.Key words: Polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP), kappa-casein gene, genotyping, Holstein, native cattle
Genomic investigation of etiologic heterogeneity: methodologic challenges
Background: The etiologic heterogeneity of cancer has traditionally been investigated by comparing risk factor frequencies within candidate sub-types, defined for example by histology or by distinct tumor markers of interest. Increasingly tumors are being profiled for molecular features much more extensively. This greatly expands the opportunities for defining distinct sub-types. In this article we describe an exploratory analysis of the etiologic heterogeneity of clear cell kidney cancer. Data are available on the primary known risk factors for kidney cancer, while the tumors are characterized on a genome-wide basis using expression, methylation, copy number and mutational profiles. Methods: We use a novel clustering strategy to identify sub-types. This is accomplished independently for the expression, methylation and copy number profiles. The goals are to identify tumor sub-types that are etiologically distinct, to identify the risk factors that define specific sub-types, and to endeavor to characterize the key genes that appear to represent the principal features of the distinct sub-types. Results: The analysis reveals strong evidence that gender represents an important factor that distinguishes disease sub-types. The sub-types defined using expression data and methylation data demonstrate considerable congruence and are also clearly correlated with mutations in important cancer genes. These sub-types are also strongly correlated with survival. The complexity of the data presents many analytical challenges including, prominently, the risk of false discovery. Conclusions: Genomic profiling of tumors offers the opportunity to identify etiologically distinct sub-types, paving the way for a more refined understanding of cancer etiology. Electronic supplementary material The online version of this article (doi:10.1186/1471-2288-14-138) contains supplementary material, which is available to authorized users
Effect of dexamethasone as an adjuvant with bupivacaine in ultrasound guided single shot supraclavicular brachial plexus block in upper extremity surgeries- a prospective randomized study
Background: Supraclavicular brachial plexus block is a good alternative to general anesthesia in surgeries of elbow, forearm, wrist and hand. The aim of this study was to assess the effect of dexamethasone as an adjuvant with bupivacaine in supraclavicular brachial plexus block in upper limb surgeries.Methods: This study was carried out on 60 adult patients of both sexes planned for upper limb surgery during the period from May 2015 to Jan 2016 after approval by the institutional Ethical Committee. Inclusion criteria were American Society of Anesthesiologists physical Status I-II and age between 18 and 50 years. Patients were randomly allocated to two groups of 30 patients each [group I (bupivacaine alone) and group II (bupivacaine + dexamethasone)]. Group I received 30ml of 0.5% bupivacaine with 2ml normal saline while group II received 30ml of 0.5% bupivacaine with 2ml (8mg) dexamethasone for supraclavicular brachial plexus block. Statistical analysis was performed with SPSS for Windows (SPSS Inc., Chicago, IL, USA), version 16.0. For analysis of demographic data and comparison of groups, χ2, unpaired Student's t-test and Mann-Whitney U-test were performed. Power of significance p-value of <0.05 was considered to be statistically significant. We evaluated onset, quality and duration of sensory and motor block along with side effects if any.Results: The mean onset of sensory and motor block in Group I and II was statistically insignificant. The duration of motor and sensory block was significantly prolonged in Group II than in Group I. There were no statistically and clinically significant differences in respiratory and hemodynamic parameters.Conclusions: We conclude that dexamethasone as an adjuvant in supraclavicular brachial plexus block prolongs the duration of motor and sensory block with insignificant side effects
Effects of antiplatelet therapy on stroke risk by brain imaging features of intracerebral haemorrhage and cerebral small vessel diseases: subgroup analyses of the RESTART randomised, open-label trial
Background
Findings from the RESTART trial suggest that starting antiplatelet therapy might reduce the risk of recurrent symptomatic intracerebral haemorrhage compared with avoiding antiplatelet therapy. Brain imaging features of intracerebral haemorrhage and cerebral small vessel diseases (such as cerebral microbleeds) are associated with greater risks of recurrent intracerebral haemorrhage. We did subgroup analyses of the RESTART trial to explore whether these brain imaging features modify the effects of antiplatelet therapy
First report of asthma prevalence in Afghanistan using international standardized methods Premier rapport sur l�asthme en Afghanistan utilisant des méthodes internationales normalisées
No data on the prevalence of asthma in Afghanistan have been published before. In a school-based survey in 2010�2011 the wheezing section of the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire was completed by a random sample of 1500 children aged 6�7 years and 1500 adolescents aged 13�14 years old. The prevalence of physician-diagnosed asthma was 12.5 in 6�7-year-olds and 17.3 in 13�14-year-olds (P = 0.002). The prevalence of wheeze in the last 12 months was similar in children and adolescents (19.2 and 21.7 respectively). The prevalence of ever wheezing, night attacks, speech-limiting wheeze and exercise-induced wheeze was 23.1, 4.8, 12.2 and 9.6 respectively in children and 30.5, 4.4, 13.0 and 13.6 respectively in adolescents. These rates are higher than those in neighbouring countries. This first epidemiological survey of asthma in Afghanistan shows that asthma and wheezing are common in Kabul students. © 2015, World Health Organization. All Rights Reserved
Primary immunodeficiency disorders in Iran: Update and new insights from the third report of the national registry
Background: Primary immunodeficiency disorders (PID) are a group of heterogeneous disorders mainly characterized by severe and recurrent infections and increased susceptibility to malignancies, lymphoproliferative and autoimmune conditions. National registries of PID disorders provide epidemiological data and increase the awareness of medical personnel as well as health care providers. Methods: This study presents the demographic data and clinical manifestations of Iranian PID patients who were diagnosed from March 2006 till the March of 2013 and were registered in Iranian PID Registry (IPIDR) after its second report of 2006. Results: A total number of 731 new PID patients (455 male and 276 female) from 14 medical centers were enrolled in the current study. Predominantly antibody deficiencies were the most common subcategory of PID (32.3 %) and were followed by combined immunodeficiencies (22.3 %), congenital defects of phagocyte number, function, or both (17.4 %), well-defined syndromes with immunodeficiency (17.2 %), autoinflammatory disorders (5.2 %), diseases of immune dysregulation (2.6 %), defects in innate immunity (1.6 %), and complement deficiencies (1.4 %). Severe combined immunodeficiency was the most common disorder (21.1 %). Other prevalent disorders were common variable immunodeficiency (14.9 %), hyper IgE syndrome (7.7 %), and selective IgA deficiency (7.5 %). Conclusions: Registration of Iranian PID patients increased the awareness of medical community of Iran and developed diagnostic and therapeutic techniques across more parts of the country. Further efforts must be taken by increasing the coverage of IPIDR via electronically registration and gradual referral system in order to provide better estimation of PID in Iran and reduce the number of undiagnosed cases. © 2014 Springer Science+Business Media
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