September 20‚ 2010 EXPERIMENT Acids‚ Bases‚ and Neutrals Problem Are common house-hold products pHs balanced and neutral? Information pH measures how acidic or alkaline a solution is. Its concept was introduced in 1909 by biochemist Soren Sorensen. The scale ranges from 0-14. Solutions that range from 0 to 6 are considered to be Acidic. Solution that’s on the Acidic end of the scale is low in ph‚ high in hydrogen ion‚ and low in hydroxyl ions. An acid have a sour taste‚ reacts with metal‚ are
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professor! I chose to discuss topic 2 this week. The topic is Discuss how buffers help to regulate body pH. The pH level in the blood is maintained by the kidneys and the lungs. The pH level on the blood should be at 7.4. In order for the kidneys and lungs to maintain this pH level it affects the buffers in the blood. The buffer is a substance that is resistant to the change in the body’s pH level. Basically the buffers can make an acid or base less potent and try and neutralize it so the body is
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Activities Affecting the Environment Vegetable Gardens The aim will be to produce vegetables intensively‚ in small or larger spaces‚ in the ground or in containers‚ as the situation allows. The establishment of vegetable gardens will also aim to ensure that families have a secure food supply‚ as well as to generate income to improve the participants’ quality of life. Production techniques will be organic‚ and manure or compost will be used to fertilize soil. The types of vegetables produced will
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Chapter 13 Questions Name: Lee Jie Min Jasmine‚ Ke Jun Yong Alan‚ Lim Kai Kiang‚ Ong Kim Liang Nicholas‚ Shankra s/o Krishna Date: May 10‚ 2015 1. What are the general requirements for a fatigue crack to form and propagate? The general requirements for a fatigue crack to form and propagate are: The presence of a local plastic stress; The presence of a tension stress; The presence of a cyclic stress (repeated or fluctuating). Eliminating any one of the above three requirements will stop
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! ! 1. Describe‚ in detail‚ how to successfully get an image into view. Be as detailed as you can. -In order to get an image into view you must first control lighting by turning switch on. Then pick a slide‚ then select the lowest ocular power (4x) to set microscope into low power. The reposition slide into the circle of light by turning the two knobs located at the right of the microscope. The top knob moves slide back and forth‚ where as‚ the bottom knob positions the slide from side
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4 Aesthetic Domain Activites 1.Creative Arts Caterpillar Magnet ( young children and toddlers) Goal 1: -Read “ The Hungry Caterpillar”‚ understanding of caterpillars. Materials: wooden clothespin‚ magnets strips‚ pipe cleaners‚ googly eyes‚ pom-poms in variety of colors. Procedure: Glue a magnet strip onto the back of a hinged clothespin. Bend a pipe cleaner in a V-shape for antenna‚ then glue it and googly eyes to a craft pom-pom. Glue that pom-pom to the front of the clothespin (where
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Save a Copy button on the panel above to save your report) Activity: Enzyme Activity Predictions 1. Sucrase will have the greatest activity at pH 6 2. Sucrase will have the greatest activity at 60 °C (140 °F) 3. Sucrase activity decreases with increasing sucrose concentration. Materials and Methods Effect of pH on Enzyme Activity. 1. Dependent Variable. amount of product (glucose and fructose) produced 2. Independent Variable. pH 3. Controlled Variables. temperature; amount of substrate
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Factors Affecting Enzyme Activity Abstract: In the following lab factors affecting enzyme activity‚ temperature‚ pH‚ enzyme concentration‚ substrate concentration and surface area will be tested on a beef liver enzyme to see if there will be any effect of performance. By doing 2 or more trials the results will show whether there is an effect to the enzyme from the following factors or not. Some of the factors may denature the enzyme and some will do nothing. Using a table qualitative and the
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Carbohydrate Digestion The following questions refer to Activity 1: Assessing Starch Digestion by Salivary Amylase. 1. At what pH did you see the highest activity of salivary amylase? Why? 2. How do you know that the amylase did not have any contaminating maltose? 3. What effect did boiling have on enzyme activity? Why? 4. Describe the substrate and the subunit product of amylase. The following questions refer to Activity 2: Assessing Cellulose Digestion. 5. Does amylase use
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Temperature and Enzyme Activity Aim: To investigate the effect of temperature on enzyme activity Hypothesis: As the temperature deviates from 40°C the activity will lower Equipment: – Chemicals: – Milk – Junket tablets – Hot water – Ice – Test tubes – Stopwatch – Measuring cylinder Risk Assessment: |Hazard |Risk |Prevention | |Hot Water
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