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STUDY OF RETENTION AND PHYSICAL PROPERTIES OF CONVENTIONAL AND MICROWAVE-CURED ACRYLIC RESIN COMPLETE DENTURES AN IN-VIVO AND IN- VITRO INVESTIGATION
No full textAim: This study was two folded: an in-vivo study to compare the retentive properties of Lucitone conventional cured denture base resin and Nature-Cryl MC microwave cured denture base resin and an in-vitro study to compare the internal adaptation, fracture resistance, roughness, hardness and colour stability of these two materials and correlate the laboratory results with each other and with the clinical results.
Materials and Methods: Twenty completely edentulous male patients received twenty complete dentures constructed from Lucitone conventional cured denture base resin. The retentive properties of the upper complete dentures were measured using force measurement gauge at one week, one month and three month follow-up period. The patients were instructed to take off their dentures for two weeks. Twenty complete dentures were then constructed for the same patients using Nature-Cryl MC microwave cured denture base resin. The retentive properties of the upper complete dentures were also measured using force measurement gauge at one week, one month and three month follow-up period. After finishing the in-vivo retention measurements, the twenty patients were equally divided into two groups based on their clinical satisfaction; one group received Lucitone denture base resin and the other group received Nature-Cryl MC denture base resin. The other twenty dentures; ten made of Lucitone and ten made of Nature-Cryl MC were taken for laboratory testing. Internal adaptation was evaluated by weighing a silicon film between each denture base and the metal master mode using a precision scale. Fracture test was carried out by applying compressive mode of load at fitting surface of each denture using computer controlled materials testing machine. For measuring surface roughness and surface hardness, twenty rectangular specimens assigned to two equal groups; Lucitone conventional cured resin and Nature-Cryl MC microwave cured resin where prepared. Using 3D image of the surface profile of the specimens, WSxM software was used to calculate average of heights expressed in μm, whic
Antimicrobial Profile of Selected Snake Venoms and Their Associated Enzymatic Activities
No full textAims: To investigate the antiviral and antibacterial profile of several crude snake venoms and to assess some of their enzymatic activities. Methodology: The antiviral activities of Naja haje, Bitis arietans, Naja nigricollis and Echis carinatus snake venoms were investigated against Herpes simplex virus type1, Rift valley fever virus and Vesicular stomatitis virus using the end point of cytopathic effect method. Antibacterial activities of Bitis arietans, Cerastes cerastes, Echis carinatus, Vipera lebetina, Naja naja, Pseudechis australis, Naja nigricollis and Naja haje venoms were examined against Staphylococcus aureus, Escherichia coli, Salmonella typhimurium and Pseudomonas aeruginosa using disc diffusion method. Microdilution method was used to determine the venom's minimum inhibitory concentration. L-amino acid oxidase and phospholipase A2 activities of crude venoms were evaluated using enzymatic assays. Results: Naja nigricollis, Bitis arietans and Echis carinatus snake venoms exhibited significant antiviral activities against all test viruses, except for N. haje treated cells. The mean depletion of viral infectivity titer of venom pretreated cells was higher than its depletion post viral infection for all three venoms showing antiviral activities. Naja nigricollis exhibited the highest antiviral activity against test viruses and recorded a mean depletion of viral infectivity titer in venom pretreated cells of 3.8 log (10) / ml , 3.2 log (10) / ml and 2.5 log (10) / ml for HSV-1, RVFV and VSV, respectively. Pseudechis australis, followed by Naja naja and Naja nigricollis venoms, showed the highest inhibitory activity against test bacteria with inhibition zones ranging from 11-17 mm, 8-14 mm and 8-13 mm, respectively. Minimum inhibitory concentrations of test venoms against different bacterial strains ranged from 156 μg / ml to 1.25 mg / ml. Maximum L- amino oxidase activity was detected in Naja naja, Cerastes cerastes and Pseudechis australis. The highest Phospholipase A2 activity was identified in Bitis arietans, Pseudechis australis, Naja naja and Naja nigricollis. Conclusion: It can be concluded that snake venoms or their bioactive derivatives can be promising therapeutic agents against some microbial infections. Further investigations will be carried out for purification and more characterization of the biologically active components in snake venoms
Object-oriented data structures using Java / Nell Dale, Daniel T. Joyce, Chip Weems.
No full textIncludes index.xxii, 799 pages
Numerical and analytical methods with MATLAB for electrical engineers / William Bober and Andrew Stevens.
No full textBook fair 2013.xiii, 374 p. :"The advantage of using the MATLAB software program over other packages is that it contains built-in functions that numerically solve systems of linear equations, systems of ordinary differential equations, roots of transcendental equations, integrals, statistical problems, optimization problems, signal processing problems and many other types of problems encountered in engineering. A student version of the MATLAB program is available at a reasonable cost. However, to students, these built-in functions are essentially black boxes. By combining a textbook on MATLAB with basic numerical and analytical analysis, (although I'm sure that MATLAB uses more sophisticated numerical techniques than are described in these textbooks), the mystery of what these black boxes might contain is somewhat alleviated. The text contains many sample MATLAB programs that should provide guidance to the student on completing the assigned projects"-
Web application security (Online)
No full textIncludes index.Includes bibliographical references and index.xvii, 331 p.
Reading skills / Jeremy Taylor, Jon Wright.
No full textlanguage bookfair2015144 p. :A step-by-step guide to a high IELTS reading score.This book is suitable for passing the IELTS Academic Reading Test with a grade of 6.5 to 7.0 or higher, this book teaches a range of key strategies for reading effectively and for understanding texts more easily, such as skimming, scanning and speed reading techniques, helping students to get a better result in the Reading paper
Architecture and design versus consumerism : how design activism confronts growth / Ann Thorpe.
No full textIncludes bibliographical references and index.xiii, 242 p. :The mentality that consumerism and economic growth are cure-alls is one of the biggest obstacles to real sustainability, but any change seems impossible, unthinkable. Our contemporary paradox finds us relying for our well being on consumer-driven economic growth that we actually can't afford -- not in environmental, economic or social terms. Although architecture and design have long been seen as engines for consumerism and growth, increasing numbers of designers are concerned about the problems resulting from growth. But designers face a paradox of their own; in scenarios of sustainable consumption, where people consume or build significantly less, what will be left for designers to do? This book, informed by recent research into the viability of a "steady state" economy, sets an agenda for addressing the designer's paradox of sustainable consumption. The agenda includes ways that architecture and design can help transition us towards a new kind of economy that prioritizes real wellbeing rather than economic growth. Packed with examples and illustrations, the book argues that taking action, or activism, is an important but so far underexplored way for architects and designers to confront consumerism. The first chapters explore how economic growth and consumerism shape and are shaped by the professions of architecture, product, and landscape design and how we can understand the problem of consumerism as four main challenges that designers are already addressing. The book maps out the main issues surrounding the development of metrics that designers and others can use to measure wellbeing, instead of simply measuring economic growth. The second half of the book looks at how design activism works and its connection to growth and consumerist issues. These chapters examine how activist practices are financed, highlight five specific methods that designers use in working for social change, and investigate the power of these methods. The book concludes with a consideration of what design's role might be in a "post-growth" society
Pathophysiology made incredibly visual!.
No full textIncludes bibliographical references and index.Book fair 2013.vi, 250 p.
Tian ran chan wu hua xue. English 24294
No full textIncludes bibliographical references and index.Book fair 2012xviii, 363 p.
A Proposed Churn Prediction Model
No full textChurn prediction aims to detect customers intended to leave a service provider. Retaining one customer costs an organization from 5 to 10 times than gaining a new one. Predictive models can provide correct identification of possible churners in the near future in order to provide a retention solution. This paper presents a new prediction model based on Data Mining (DM) techniques. The proposed model is composed of six steps which are; identify problem domain, data selection, investigate data set, classification, clustering and knowledge usage. A data set with 23 attributes and 5000 instances is used. 4000 instances used for training the model and 1000 instances used as a testing set. The predicted churners are clustered into 3 categories in case of using in a retention strategy. The data mining techniques used in this paper are Decision Tree, Support Vector Machine and Neural Network
throughout an open source software name WEKA