IB Biology Sheran Gu Meghan Lena Nov. 15th Influence of pH on Enzyme Activities How does the pH of solution influence the speed of enzyme activities? Enzymes are protein catalysts and chemical that speed up chemical reaction without being involved in the reaction. They are involved in the human digestive system to help people digest food more efficient. Food are substrates to be break down and absorb through the digestive system in the body. Substrate is a molecule that bond with the active site
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Environmental Science March 30‚ 2014 Ms. Marcia Foil Organic Food: Good for You‚ Good for the Environment Organic food has quickly gained popularity over the years. What started as a trendy method that celebrities adopted has expanded mainstream and can be found in any thriving metropolis as well as many smaller towns and cities. Organic food refers to any type of produce or meat product that has not be treated with additional chemical preservatives when it is grown and therefore is considered to
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rental expenses Opportunities Threats Higher demand for organic products Expansion in the UK Growth in private label products Increasing competition Labeling and other regulations Slowdown in the US economy Strengths Weaknesses Strong revenue growth Focused growth strategy Wide product portfolio Weak international operations Conservative international policy Increasing rental expenses Opportunities Threats Higher demand for organic products Expansion in the UK Growth in private label products
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Session :- 2012-13 Topic : Study of effect of Potassium bisulphite as a food preservative Submitted To: Submitted By: Mr. B.GHOSH H.O.D. Chemistry 12th Science Roll no. = Certificate This is to certify that s/o Mr. Amar Singh is a bonafide student of class XIIth Science during session 2012-2013. He has completed his project on Study of effect of Potassium bisulphite as a food preservative successfully under my guidance and supervision
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The Effect of Soil pH on the Living Conditions In Lumbricus terrestris Abstract The difference in soil pH weighs a heavy measure on the appearance of the earthworm Lumbricus terrestris in different areas of soil. A highly acidic or highly alkaline soil may be the underlying reason for the absence of this earthworm in certain areas where pH plays a large role. In this experiment‚ soil pH was altered with Miracida soil acidifier and Agricultural Limestonea soil correctional for acidic soil
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Maggie Mitchell IB Chemistry Prd. 5 THE HALOGENS LAB Date: 9/11/13 Purpose: The purpose of this experiment was to observe and record the halogens’ (NaF‚ NaCl‚ NaBr‚ and KI) reactions with the chemicals Ca(NO3)2‚ AgNO3‚ and NH4OH and use these observations to identify an unknown halogen. Data: (see next page) TABLE 1: REACTIONS OF HALOGENS WITH CA(NO3)2‚ AGNO3‚ AND NH4OH REACTION NAF NACL NABR KI REACTION W/ CA(NO3)2 solution turns cloudy and precipitate forms clear precipitate
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Joshua McMahon IB Chemistry Matt Chase 3A 2/13/15 Finding the PH of different concentrations of orange juice. Research Question By diluting concentrated orange juice with water‚ can you significantly change the PH value? Introduction Across the world‚ it is thought and widely accepted to believe that Orange juice is the cure to many terrible diseases. However‚ this may not be true anymore. It has been said that Oranges are very high in vitamin C‚ therefore one should drink it every morning
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year 12 Chemistry – mr symoniw | Extended Experimental Investigation | Food Chemistry | | Yash Kamal | Semester 1 | Index Rationale – 1 Hypothesis – 6 Aim – 6 Materials – 6 Method – 6 Results – 6 Discussion – 10 Conclusion – 17 Recommendations – 17 Appendices and Bibliography – 19-24 Index Rationale – 1 Hypothesis – 6 Aim – 6 Materials – 6 Method – 6 Results – 6 Discussion – 10 Conclusion – 17 Recommendations – 17 Appendices and Bibliography – 19-24 Rationale
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Date: May 22‚ 2012 Name: Cristhian Valor Organic Laboratory Pre-Lab 1. Main reaction sequence including side reaction products: 2. 3 Sentence Summary of the Experiment: The OH group on the benzene ring in salicyclic acid reacts with acetic anhydride to form an ester functional group. Thus the formation of acetylsalicyclic acid (aspirin) is referred to as an esterification reaction‚ which requires the presence of H+ (H2SO4 in our case). The technique used to purify the aspirin content
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Abstract This lab was performed in order to discover the activity of the enzyme catecholase in different pH levels as well as its absorbance in differently concentrated solutions. A spetrophotometer was used to measure the absorbance of the enzyme catecholase in different pH solutions as well as to measure the absorbance of catecholase in solutions with different concentrations of potato juice and phosphate buffers. Absorbance of the enzyme catecholase was at an optimum level when pH was close to
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