Determining the Molar Mass of an Unknown Solute by Freezing Point Depression Introduction: Colligative properties of solutions are only influenced by the concentration of solute particles and are independent of the nature of the solute. Some examples of colligative properties are boiling point elevation‚ vapor pressure lowering‚ and freezing point lowering (depression) (Brown‚ 542). For a substance to freeze‚ the kinetic energy of the particles must be low enough for the
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effects of stressful experimental treatments on living membranes we are going to examine how fresh beets roots react when they are exposed to different temperatures. Membranes are an important feature of plant cells and they act as a barrier that separates the interior of the cell from the external environment (Campbell 133). They organize specific chemicals and reactions into specific compartments within the cell. Generally‚ cell membranes consist of phospholipids bilayer that is impermeable to
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The Semipermeability of Cell Membrane to Different Osmotic Environments Using Dialyzing Bag Model1 Sittie Johaynnah M. Sambarani Group 3 Sec. I-1L December 17‚ 2012 ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- 1 A scientific paper in partial fulfillment of the requirements in Biology 10 Laboratory under Professor Junaldo
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Purpose: The purpose of this lab is to test the effects of osmosis on eggs in hypertonic solutions and hypotonic solutions. Hypothesis: If the corn syrup is a hypertonic solution‚ then the egg’s size will shrink. If the water is a hypotonic solution‚ then the egg will swell. Materials: Styrofoam cups (2 per group) Styrofoam cups to weigh down egg (2) Balance Paper towels Vinegar (enough to cover egg) Distilled water Corn syrup Fresh eggs (2 per group) Procedure: Day
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BioLab3 Cell Membranes Lab Report Student Name: I. Diffusion Define the following terms. Solvent Solute Solution. Diffusion Concentration gradient Dynamic equilibrium EXERCISE 1 – Factors influencing rate of diffusion Predict how molecule size and temperature will affect the outcome of this experiment. Record the data from the information in the lab. Potassium Permanganate R.T. Methylene Blue R.T. Time (min) Total Diameter
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Able‚ Not Adulterous In the timeless novel The Scarlet Letter by Nathaniel Hawthorne‚ the scarlet letter “A” is meant to be a symbol of shame and punishment given by the Puritan elders of Boston to Hester Prynne for the crime of adultery; when the story opens‚ the identity of her lover is unknown‚ but it is revealed later to be the Reverend Dimmesdale. In the Puritan society‚ the townspeople shun Hester for her sinfulness. The letter on Hester’s clothing intended to publicly humiliate and shame
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Cell Membrane Structure Phospholipids are arranged in to layers‚ called the bilayer. They only have 2 fatty acids‚ this is because the third fatty acid is replaced by a negatively charged phosphate group. The phosphate heads are polar‚ in other words attracted to water‚ therefore they are hydrophilic. The lipid tails are non-popular as they’re not attracted to water and therefore known as hydrophobic. When phospholipids are added to the water‚ they rearrange themselves so that the hydrophilic heads
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Question: Do all liquids diffuse in the same way? Purpose: The purpose of this experiment was to find out if all liquids diffuse in the same way. Hypothesis: If different liquids diffuse‚ then the process will not be the same because liquids are made up of different molecules‚ with different densities‚ the diffusion will take longer/shorter than others. Materials: 1 plastic dropper with rubber top (medicine dropper) 3 glass beakers (400mL) 1 graduated cylinder (500mL) 4 drops of red
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Bacterial Energetics and Membranes Abstract The Mg2+/Ca2+ ATP synthase present in all bacterial membranes‚ particularly E. coli‚ couples ATP synthesis to the proton (H+) gradient produced by the ETC‚ a process known as oxidative phosphorylation. The gradient acts to power the ATPase‚ so that it may phosphorylate ADP to produce ATP. The reverse reaction of this process‚ or hydrolysis of ATP into ADP and Pi‚ may be used to observe ATPase activity when the resulting Pi is quantitatively measured
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work with. My mentor maam Kristel teach me how to do a Time Measurement Sheet and other kind of Charts and Table related in How to do a TMS. She also explain how their workers do their Jobs. How importance of being good to your people specially when Its come to the relationship of the supervisor and the worker. Before the days end maam introduce me in all staff in production area and in accounting office. January 23‚ 2013 Second Day in my OJT. Ill go earlier in the company because
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