different types of additives and a normal concrete compacted by vibration. The self-compacting concrete mixtures present slump-flow of 650 ± 50 mm and have the same cement contents. In the self-compacting mixtures‚ were used as additives‚ fly ash‚ silica fume‚ hydraulic lime and a mixture of fly ash and hydraulic lime. A modified carboxylates superplasticiser was used to obtain a specific workability. The capillary absorption was carried out at 7‚ 14 and 28 days of age‚ through a methodology described
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Fiber Optics FIBER OPTICS FROM A TO Z TABLE OF CONTENTS Page Introduction…………………………………………………………… 1 History………………………………………………………………… 2 Design………………………………………………………………… 4 Advantages and Disadvantages…………………………………… 7 Advancements……………………………………………………….. 9 Conclusion…………………………………………………………… 11 Citations………………………………………………………………. 13 I - Introduction You hear about fiber-optic cables whenever people talk about the telephone system‚ the cable
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Research Journal Of Chemistry And Environment‚ Vol. 7 (4) Dec. (2003) Res. J. Chem. Environ. Review Paper: Biosorption of Heavy Metals N. Ahalya‚ T.V. Ramachandra*l and RD. Kanamadi2 1. Centre for Ecological Sciences‚ Indian Institute of Science‚ Bangalore 560 012‚ INDIA. 2. Department of Zoology‚ Karnataka University‚ Dharwad‚ INDIA. Abstract: The discharge of heavy metals into aquatic ecosystems has become a matter of concern in India over the last few decades. These
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Woodlice Investigation Introduction: The ecological niche of the woodlice Porcellio scaber. The woodlouse Porcellio scaber is native to Europe but also commonly found in New Zealand. They live in cool‚ dark‚ damp microhabitats such as in rotting wood‚ under rocks‚ in caves and leaf litter. Small insectivorous rodents and birds as well as some spiders feed on woodlice. In the rotting log from which I gathered my specimens there were also millipedes‚ crickets‚ weta and spiders living. Woodlice
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Statin drugs are some of the most effective drugs in the battle against high cholesterol. They are the most efficacious in lowering LDL cholesterol. Furthermore‚ recent studies have shown that statins are capable of preventing heart attacks and reducing the risk of strokes. However‚ statins are only recently gaining public attention though they have been available for many years. Various cholesterol-lowering agents had been discovered during the 1950s and 1960s. However‚ the majority had unwanted
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Q3: Describe and discuss the durability properties of hardened concrete. Durability is the ability of concrete to handle deterioration from the surroundings or at the service in which it is placed. The most important things that cause rust could be divided into two chemical and physical causes. The Chemical durability complications are disturbed with countless formulae reactions of cement-aggregate. On the other hand In the physical durability aspect problems are concerned from the aggregates
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million with Lever Brothers buying Reckitt–Columbus‚ the industrial division of Reckitt and Colman‚ in 1982 and then adding a new NSD Plant and Oil Mill in Boksburg‚ an upgraded Bath soap manufacturing facility in Durban and production facilities for silica gels. 1985 marked the acquisition of Brooke Bond Oxo‚ followed by Cheesebrough Ponds in 1987‚ Simonsberg Cheese in 1988 and the local Elizabeth Arden business in1989. Ola ice cream was established in 1994 and Van Den Bergh & Jurgens and Lipton
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Department of Chemical Engineering‚ IIT Delhi POLYIMIDE SUBMITTED TO: Dr. Sreedevi Upadhyayula SUBMITTED BY: Gurdeep Singh Somal 2010CH10078 Gurvineet Singh Dhillon 2010CH10079 Gaurav Singh Sinsinwar 2010Ch10077 Polyimide is a polymer of imide monomers. The structure of imide is as shown. Polyimides have been in mass production since 1955. Typical monomers include pyromellitic dianhydride and 4‚4 ’-oxydianiline. Polyimides are a very interesting group of incredibly strong and astoundingly
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Final Project: Metabolism Support Supplement For Women Tracy A. Richards Kaplan University HW205: Vitamins‚ Herbs and Nutritional Supplements Metabolism Support Supplement For Women During the past 20 years‚ there has been a dramatic increase in obesity in the United States and rates remain high. Obesity-related conditions include heart disease‚ stroke‚ type 2 diabetes and certain types of cancer‚ some of the leading causes of preventable death. James O. Hill‚ PhD‚ director of the
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Methods and Materials involved A tablet is a mixture of active substances and excipients usually in powder form‚ pressed or compacted into a solid. The excipients include binders‚ glidants (flow aids) and lubricants to ensure efficient tabletting; disintegrants to ensure that the tablet breaks up in the digestive tract; sweeteners or flavours to mask the taste of bad-tasting active ingredients; and pigments to make uncoated tablets visually attractive. A polymer coating is usually applied
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