579 research outputs found

    Estimation Of Longitudinal Moment Derivatives Of Missile Configuration Using Semi Free Flying Technique

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    A Semi-Free Dynamic Flying Test Technique Has Been Used To Estimate The Pitching Moment Derivatives Of A Missile Model. Wind Tunnel Tests Were Carried Out On A 1 :8 Scale Model Of PJ08 Missile Configuration. The Pitching Moment Derivatives Were Estimated From The Angular Motion Responses Of The Model To Doublet Input Using MLE Method. The Results Of Tests On Configuration 1 For Three CG Positions Are Detailed

    Dragon Fruit: A Fruitful Approach for Healthy Skin

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    The health-enhancing capacity of pitaya fruit (chemical constituents like Vitamin B2, Vitamin C, iron, high dietary fibre, etc.) stems from its abundance of bioactive elements, associated with a multitude of advantages encompassing anti-aging, anti-diabetic, anti-inflammatory, antioxidant, anti-cancer, and antimicrobial properties. This array of favourable effects has led to an upsurge in the consumption of this fruit across various global locales. The pitaya fruit holds remedial significance, contributing to the elimination of heavy metal toxins and the reduction of cholesterol and blood pressure. Additionally, the dragon fruit peel exhibits considerable potential as a natural colouring agent. According to there are two kinds of extraction methods; conventional and modern method. The conventional extraction includes maceration, reflux and Soxhlet extraction and the modern extraction includes MAE (Microwave-Assisted Extraction) and UAE (Ultrasound-Assisted Extraction). The recent introduction of dragon fruit into the country has raised significant concerns regarding its quality assurance, particularly pertaining to the critical aspect of appropriate harvest maturity

    Regenerative Endodontic Technique using a combination of Amoxicillin and Metronidazole. A review and report of two cases

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    The management of non vital anterior permanent teeth in children is a challenge for the clinicians. Once the tooth becomes non vital, the root development ceases, which renders the tooth weak and unable to withstand the physiological forces of mastication. This results in a high fracture rate, and therefore a poor prognosis in the medium to long term. Recently there has been a paradigm shift in the approach to this clinical problem through the use of regenerative endodontics. Despite many case reports, and a few case series that have been reported, the procedure is still shrouded in uncertainty as differing interventions have been used, though broadly based on similar principles. In the Department of Paediatric Dentistry at the Leeds Dental Institute we have used a particular regenerative endodontic technique (RET), using a mixture of two antibiotics (Amoxicillin and Metronidazole). In this paper, we aim to present the rationale for this technique and present two cases successfully treated and followed for up to two years

    The Influence Of Maternal Infections On Congenital Heart Defect

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    ABSTRACT Congenital heart defects (CHDs) contribute significantly to heightened infant mortality rates. This review explores the intricate link between maternal infections and CHDs, emphasizing diverse factors influencing fetal development, such as bacterial, fungal, protozoan and viral agents. These infections pose reproductive health risks, potentially leading to complications like prematurity, stillbirth and heart defect to the fetus. The TORCH acronym (Toxoplasma, Other infections, Rubella, Cytomegalovirus, Herpes simplex) identifies infectious teratogens related to congenital issues, emphasizing vertical transmission through the placenta or ascending from the vagina. Rubella and Cytomegalovirus play a significant role in heart defects, particularly when maternal infections amplify CHD risk during pregnancy. Specific scrutiny is placed on Rubella and Cytomegalovirus for their impact on pregnancy outcomes and potential links to congenital heart defects, with preventive strategies discussed, including vaccination and antiviral therapy. The timing and severity of these infections are pivotal in determining their impact on fetal heart development. Environmental exposures and maternal nutrition are critical factors influencing fetal development. Maternal undernutrition in low- and middle-income countries associates with adverse pregnancy outcomes, including congenital heart defects. Emphasizing the importance of maintaining a nutritious maternal diet, rich in essential nutrients, is crucial for improved fetal health and successful pregnancy outcomes. This review offers insights into preventive measures and underscores the need for continued research to enhance prenatal care strategies

    Apolipoprotein E Polymorphism And It’s Lifestyle Impact

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    The Apolipoprotein E Polymorphism, with its three main allelic variants (APOE2, APOE3, and APOE4), has gained prominence in genetic research due to its critical implications for human health. This review article offers a concise introduction to the APOE protein polymorphism and its influence on individual’s way of life. The APOE gene encodes apolipoprotein E, a critical component of lipid metabolism that is essential for both cholesterol transport and neuron repair in the central nervous system. APOE ℇ4 raises Alzheimer's risk, ℇ2 protects, and ℇ3 is neutral. Lifestyle choices, such as diet, exercise, and cognitive engagement, predict susceptibility to chronic illnesses like Alzheimer's and cardiovascular disease (CVD). For APOE ℇ4 carriers, a heart-healthy lifestyle can reduce elevated risk, while ℇ2 carriers, being less vulnerable, may need less intervention

    Complexity without chaos: Plasticity within random recurrent networks generates robust timing and motor control

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    It is widely accepted that the complex dynamics characteristic of recurrent neural circuits contributes in a fundamental manner to brain function. Progress has been slow in understanding and exploiting the computational power of recurrent dynamics for two main reasons: nonlinear recurrent networks often exhibit chaotic behavior and most known learning rules do not work in robust fashion in recurrent networks. Here we address both these problems by demonstrating how random recurrent networks (RRN) that initially exhibit chaotic dynamics can be tuned through a supervised learning rule to generate locally stable neural patterns of activity that are both complex and robust to noise. The outcome is a novel neural network regime that exhibits both transiently stable and chaotic trajectories. We further show that the recurrent learning rule dramatically increases the ability of RRNs to generate complex spatiotemporal motor patterns, and accounts for recent experimental data showing a decrease in neural variability in response to stimulus onset

    Relation of exaggerated cytokine responses of CF airway epithelial cells to PAO1 adherence

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    In many model systems, cystic fibrosis (CF) phenotype airway epithelial cells in culture respond to P. aeruginosa with greater interleukin (IL)-8 and IL-6 secretion than matched controls. In order to test whether this excess inflammatory response results from the reported increased adherence of P. aeruginosa to the CF cells, we compared the inflammatory response of matched pairs of CF and non CF airway epithelial cell lines to the binding of GFP-PAO1, a strain of pseudomonas labeled with green fluorescent protein. There was no clear relation between GFP-PAO1 binding and cytokine production in response to PAO1. Treatment with exogenous aGM1 resulted in greater GFP-PAO1 binding to the normal phenotype compared to CF phenotype cells, but cytokine production remained greater from the CF cell lines. When cells were treated with neuraminidase, PAO1 adherence was equalized between CF and nonCF phenotype cell lines, but IL-8 production in response to inflammatory stimuli was still greater in CF phenotype cells. The polarized cell lines 16HBEo-Sense (normal phenotype) and Antisense (CF phenotype) cells were used to test the effect of disrupting tight junctions, which allows access of PAO1 to basolateral binding sites in both cell lines. IL-8 production increased from CF, but not normal, cells. These data indicate that increased bacterial binding to CF phenotype cells cannot by itself account for excess cytokine production in CF airway epithelial cells, encourage investigation of alternative hypotheses, and signal caution for therapeutic strategies proposed for CF that include disruption of tight junctions in the face of pseudomonas infection

    Why a clearer ‘green industrial policy’ matters for India: Reconciling growth, climate change and inequality

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    © 2016, © The Author(s) 2016. To ensure a healthy growth of the economy particularly in the manufacturing sector, the Indian Government is more than ever focussed on promoting the use of sustainable and affordable energy resources. Recent initiatives such as the Solar Cities Development Programme are a good example. However, in order for these initiatives to gain legitimacy as part of a new ‘green industrial policy’, the Indian Government needs to do more, especially by bringing on board strategies for combating poverty within the gamut of this emerging ‘green industrial policy’ as well as to re-think India’s position on global conventions on climate change

    Caretaker Brca1: keeping the genome in the straight and narrow

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    Inheritance of germline BRCA1 mutations is associated with a high risk of breast and ovarian cancers. A multitude of cellular functions has been ascribed to BRCA1, including transcription activation and various aspects of DNA repair. So far, indirect evidence has indicated a role for BRCA1 in the repair of double-strand breaks. Recently, an elegant gene targeting design was used to provide definitive evidence that BRCA1 promotes homologous recombination and limits nonhomologous mutagenic repair processes. This reaffirms the role of BRCA1 as caretaker in preserving genomic integrity
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