A pH meter is an electronic instrument used to measure the pH (acidity or alkalinity) of a liquid (though special probes are sometimes used to measure the pH of semi-solid substances). A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the pH reading. The probe The pH probe measures pH as the activity of hydrogen ions surrounding a thin-walled glass bulb at its tip. The probe produces a small voltage (about 0
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Germination is the sprouting of a seedling to a seed. All seeds need oxygen‚ water‚ and efficient temperature in order to complete germination. A key ingredient for seeds to fully sprout is water. Water will moisten the seed and allow it to complete germination in order to grow and complete its cycle. Although‚ when sodium chloride is present‚ it takes way of water trying to enter the seed‚ therefore creating a blockage and will become inactive or germinate slowly (cocoponics‚ 2011). Unlike diffusion
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Family Family is defined as unconditional love‚ unconditional help and less selfishness. Authors Jodi Picoult and Kim Edwards prove that this is not always true. Picoult the author of My Sisters Keeper argues that when an individual is affected by illness‚ family will do whatever it takes to save them because when a family falls apart one’s life shortly follows. Edwards argues a similar case in her novel The Memory Keepers Daughter that all it takes is one selfish act to change the direction of
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The effect of enzyme concentration‚ substrate concentration‚ pH‚ and temperature on the enzyme catalase. Introduction: Enzymes are biological catalysts; proteins and RNA. They are required for most biological reactions and they are highly specific. Each enzyme has an active site. The active site is the spot on the enzyme where a substrate fits in. Substrates binds with enzymes through the active site. Enzymes‚ being highly specific‚ only fit with one certain substrate. Enzymes and substrates
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Determining the Production of Glucose During Changes in Temperature and pH‚ and Manipulation of Specificity and Cofactors BIOL-1406-SL8 November 16‚ 2012 Abstract Enzymes are biological catalysts. They work by lowering the activation energy needed to initiate a chemical reaction. Enzymes work within an optimal temperature and optimal pH. Enzymes are highly specific for a single substrate. The Enzyme is usually much larger in size than the substrate it binds to. In some cases‚ an enzyme requires
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Enzymatic Activity of Salivary Amylase Ong‚ Janela Rose I.; Paguia‚ Maria Tricia C.; Placente‚ Dax Daven A.; Posadas‚ Grace Catherine A. 3Bio3-Group 8 Department of Biological Sciences‚ College of Science University of Santo Tomas‚ España‚ Manila 1008 Abstract This experiment aims to examine the enzymatic activity and specificity of salivary amylase depending on the changes in pH and temperature; and determine the optimum temperature and pH of the amylase. EXPERIMENTAL In the
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meter (N/m2)‚ or pascals (Pa). 3. Slowly drag the temperature (T) slider back and forth. (Note: In this Gizmo‚ the Kelvin scale is used to measure temperature. On the Kelvin scale‚ 0 degrees is absolute zero‚ the coldest possible temperature. Absolute zero is equal to -273.15 °C or -459.67 °F) A. How does the change in temperature affect the speed of the molecules? __If the temperature is colder the molecules move slower and if the temperature is hotter the molecules move faster.
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The Wind That Shakes the Barley The wind that shakes the barley is a film made of Ken Loach‚ the film are made in 2006 Setting: “The wind that shakes the barley” takes place in Ireland‚ during the Irish War of Independence (1919-1921) and the Irish Civil War (1922-1923) and it is a real story. After World war 1. Put a stopper for the home rule bill in Ireland there came English soldiers into Ireland and treated the Irish people really bad. Then some of the Irish people got upset and began to
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of the barley seeds‚ increased as the Aquasol concentration increased. This is with the exception of the solution with an initial Aquasol concentration of 0.40% in Table 1‚ which showed to have‚ on average‚ shorter shoot heights in comparison to the solution with 0.25% Aquasol. Ultimately‚ this indicates that the experiment had random and systematic errors that affected the accuracy‚ reliability‚ validity‚ and precision of the results. That being said‚ the results imply that‚ overall; barley seed germination
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This experiment shows the effects of changing the pH level has on Catalase. As predicted‚ the farther away the pH levels got from the optimum pH (7.2)‚ the lower the reaction rate. At a pH of 7.2‚ the foam of the reaction measures 6cm. At a ph of 3 it measures 2.5 cm‚ at a pH of 5 it measures 2.75 cm‚ at ph 9 it measures 2.3 and at 11cm it measures 2cm. pH measures the hydrogen ion concentration of a substrate. By changing the pH of the catalase‚ the enzyme was denatured. Denaturing is the result
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