What can speed up the decay of bread? Aims In this activity you are going to think about the conditions that would affect the speed at which bread decays and then design a fair test to investigate one of the. This will help you to understand all the points you need to consider when planning an experiment. Safety If you perform this activity: * Do not taste any food. * Wear gloves when handling food. * Wash your hands when you have finished setting up your experiment. * Your
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In this study‚ three general media will be used for the detection of microorganisms on the equipment‚ personnel‚ raw materials and the finished goods. These are Potato Dextrose Agar (PDA)‚ Plate Count Agar (PCA) and Violet Red Bile Agar (VRBA) under the Univar brand. The amount of each prepared medium or dehydrated medium depends on the number of samples to be tested. PDA is usually used for the presence of yeasts and molds which are the most common food
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Planarians A planarian is a small free-living flatworm. These flat worms are usually found under rocks in fresh water. They are part of the phylum Platyhelminthes and in the class Turbellaria. Planarians are usually zoophagous‚ they feed on small living invertebrates and decaying organisms found in their community. Some planarians could eat segmented worms‚ leeches‚ snails‚ and other small herbivores. Planarians may also be organisms that gain their food energy with the help of decomposing
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The antifeedant activity of the extracts choice and no-choice test methods‚ after 24 and 48 hours in each test‚ against 7 day old (3rd instar) larvae of S. litura on castor leaves. Stock solutions of the test compounds were prepared in the carrier solvents. Further dilution was done in emulsified water by maintaining emulsifier (Tween – 80) level at 0.5 % to yield various concentrations. Castor leaf discs (4 cm diameter) were punched out from the washed and dried castor leaves. Leaf discs were dipped
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OSMOSIS IN POTATO TISSUES Vanessa Tsao‚ Lovette To‚ Wang Yeyun‚ Zhang Shenjia‚ Alicia Mak Class 101‚ Nanyang Girls’ High School‚ 2 Linden Drive‚ Singapore 288683 ABSTRACT In this project‚ the relationship between the concentration of salt solution and the length of the potato strip that was immersed in it was investigated. Five strips of potato of the same length were placed in different Petri dishes that contained water of different salt concentration. They were left for twenty minutes and the length
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Goa girl develops touch-free phone technology: The next ’in’ feature for your smart phone might very well be gesture-recognition and it is a young Goan who is behind the innovation. The creation is set to make touchscreen technology passe and would allow users to interact with their devices through thin air. Native of South Goa’s Velim‚ Andrea Colaco‚ has not only earned a graduate and master’s degree‚ and later earned one of the most-sought after doctorate seats at the prestigious Massachusetts
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Clocky ClockyClocky is a brand of alarm clock outfitted with wheels‚ allowing it to hide itself in order to force the owner awake in an attempt to find it. Invented for an industrial design class by Gauri Nanda‚ then a graduate student at MIT Media Lab‚ Clocky won the 2005 Ig Nobel Prize in Economics.[1][2] After earning her Masters Degree from MIT‚ Nanda founded a company‚ Nanda Home‚ to commercialize Clocky and other home products. History The original prototype‚ built in three days‚ was
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6 R’s The 6 R’s are an important checklist. They are used by designers to reduce the environmental impact of products. They can also be used to evaluate the environmental impact of other products. Respect – In order to understand what it means to be a part of the solution‚ you have to begin with respect. Respect for all things: people‚ animals‚ bugs‚ birds‚ fish‚ snakes‚ rivers‚ lakes‚ oceans‚ trees‚ mountains‚ valleys and so on. Rethink — Everything on Earth is connected‚ and every decision
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Lab #5: Refraction of Light Theory: Refraction can be defined as the bending of a wave when it enters a medium which causes it to have some reduced speed. In terms of light‚ refraction occurs when the ray passes through some medium which slows its speed; such as water or glass. In this instance the ray tends to bend towards the normal of the medium. The amount of bending or refraction which occurs can be calculated using Snell’s Law (). Objective: To measure the index of refraction of Lucite
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Clocky Invented by Gauri Nanda‚ for an industrial design class‚ then a graduate student at MIT Media Lab‚ Clocky won the 2005 Ig Nobel Prize in Economics. Clocky is a brand of alarm clock with wheels‚ allowing it to move around in order to force you to awake in an attempt to find it. After earning her Masters Degree from MIT‚Gauri Nanda founded a company‚ Nanda Home‚ to commercialize this product Cloky‚ and other home products. The market for watches and clocks was bigger than $7 billion in the
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