IB Biology Lab – Vitamin C content of food Aim: To compare the vitamin C content of different fruits using the decolourisation of DCPIP from blue to clear as the indicator. • You first need to estimate the volume of a known concentration of vitamin C solution required to decolourise 2 cm3 of DCPIP solution. • Then you need to determine the volume of fruit juice that decolourises 2 cm3 of DCPIP solution. This gives an estimate of the concentration of vitamin C in fruit juice. • This
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lives. There have been studies that show that people who are abused by their peers are at risk for serious problems (Murillo C.‚ 2008). These problems include low self esteem‚ stress‚ depression or anxiety and even in the worst cases‚ suicide. Sloane Molloy‚ a guidance counselor at Glynn Middle School‚ states “It can escalate to violence when left unchecked” (Murillo C.‚ 2008). Besides the students the school is also affected by bullying. Many schools are fighting back against bullying. There
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Investigating the vitamin C content of fruits and fruit juice Aim: In this investigation‚ I aim to measure and compare whether there is a higher content of vitamin C in a fruit or a juice by measuring the volume of the sample required to decolourise a solution of dichlorophenolindophenol (DCPIP). Introduction: For this experiment‚ I aim to investigate and compare the content of vitamin C in the fruit against the fruit juice. The theory of this method is a titration with dichlorophenolindophenol
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I/O Library Header Files: There are following header files important to C++ programs: The standard output stream (cout): The predefined object cout is an instance of ostream class. The cout object is said to be "connected to" the standard output device‚ which usually is the display screen. The cout is used in conjunction with the stream insertion operator‚ which is written as << which are two less than signs as shown in the following example. -------------------------------------------------
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Many people have never heard of C-ASIST and are always amazed to hear what they do for the community. I now have an ‘elevator speech’ prepared for when people ask what it is. I always say “C-ASIST‚ is a non-profit organization that offers a free health clinic once a month to help the underinsured and the uninsured.” People don’t know how it works and how the founders are able to run a free clinic‚ but I explain to them that it is all volunteer based so they do not have to pay anyone that works at
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Cytochrome-C Comparison Brief Description: The molecular clock refers to mutations in DNA nucleotide sequence of genes occurring at a constant rate over time. The greater the difference in nucleotide sequence between two individuals of different species‚ the greater the amount of time has passed since they diverged from a common ancestor. The molecular clock helps to provide evidence to support conclusions previously based on comparative morphology and fossil records. Hypothesis: One hypothesis
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1.3 C. elegans sensory system C. elegans is a simple multicellular organism‚ and‚ like other animals‚ it constantly perceives environmental cues and elicits appropriate physiological responses. Remarkably‚ this process is achieved with only a small number of neurons. An adult C. elegans hermaphrodite nervous system harbors 302 neurons‚ which have been grouped into 118 distinct classes according to their topology and synaptic connection pattern (Ward‚ 1975 #4;Sulston‚ 1977 #8;Sulston‚ 1983 #9;Ward
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some simple approaches can also be very effective. The following is one of them. Assume that A‚ B‚ C‚ D‚ E are 5 variables storing 5 numbers respectively; and we would like to show the numbers on the screen in descending order. It can be done using the procedure as follows. 1. 2. 3. 4. 5. Initialize a variable number F that keeps a very large value (must be larger than those values of A‚ B‚ C‚ D‚ E) Search among the batch for the biggest number‚ which is smaller than the value of F Show
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Upon his return to Oxford in 1919‚ he made many life long friends‚ namely A. K. Hamilton Jenkins‚ Owen Barfield‚ and A. C. Hardwood. Due to several causes including meeting mad and hopeless men and being influenced by the beliefs of the day‚ Lewis veered his life away from his previous search for romanticism and towards "the greatest good sense" (p.77). To his shock‚ some
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two students required: * vitamin C indicator solution * three 50 mL beakers or medicine cups * one 10 mL graduated cylinder * three disposable pipettes * one stirring rod * Sources of Vitamin C: freshly squeezed OJ‚ bottled OJ‚ frozen OJ‚ canned OJ * Optional: container for waste solutions and source of clean rinse water There are two different preparations (starch-iodine or indophenol) that may be used for the vitamin C indicator solution. Neither is more accurate
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