nonelectrolytes were urea‚ thiourea‚ methanol‚ ethanol‚ propanol‚ ethylene glycol‚ diethylene glycol‚ and triethylene glycol‚ and the mean hemolysis times can be seen below in Figure 1. The mean hemolysis time for urea was 11.90 seconds (±2.65 sec‚ n = 11). Thiourea took an average of 92.72 seconds (±12.41 sec‚ n = 11) to hemolyze 75% of erythrocytes‚ while methanol took 9.19 seconds (± 1.66 sec‚ n = 11). The black line was seen through
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to study the effect of various denaturants on albumin and casein protein extracts through viscosity measurements. 5 mL samples of native and denatured protein solutions were prepared‚ using -mercaptoethanol‚ urea and SDS as denaturants for albumin‚ and NaOH‚ NaCL‚ HCL‚ -mercaptoethanol‚ urea and SDS for casein. 5 mL blank solutions for each denaturant used were also prepared. The viscosity of the solutions were determined using Ostwald viscometer. ____________________________________________________________________________________
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Diffuses across general body surfaces o Examples of organisms excreting ammonia: fishes‚ aquatic amphibians and aquatic insects o Such organisms are called ammonotelic. • Urea o Less toxic o Requires less water for excretion o Terrestrial adaptation for conservation of water o Ammonia Urea o Examples of organisms excreting urea: terrestrial amphibians and marine fishes o Such organisms are called ureotelic. • Uric acid o Least toxic o Eliminated with the least loss of water‚ as pellets or
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concentration * Urea * Albumin * Glucose * Deionized water * Beakers The experiment wasn’t done in an actual lab‚ but rather using a computer simulation in order to achieve precision and save time. Results: At 20 MWCO ‚NaCl (9.00 mM) no diffusion occurred . At 50 MWCO‚ NaCl(9.00 mM) diffusion occurred from the left beaker to the right until reached equilibrium was reached. Equilibrium occurred in 10 minutes as NaCl decreases from 9.00 mM to 4.50 mM. Whereas glucose‚ urea and albumin
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IN EXCESS AND TOO LITTLE. EGESTION INCLUDES MOLECULES THAT ARE EXITING YOUR ANUS CHEMICALLY UNCHANGED 2. Name three excretory organs of humans. What liquids carry the urea that is excreted? Which organ of another studied organism resembles the nephron in function? THREE EXCRETORY ORGANS: KIDNESY‚ LUNG‚ SKIN UREA MUST BE MIXED IN WATER TO BE EXCRETED BY THE NEPHRON AND SKIN. THE NEPHRIDIA OF THE EARTHWORM IS SIMILAR IN STRUCTURE/FUNCTION TO THE NEPHRON OF A VERTEBRATE MAMMAL KIDNEY
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quicker the diffusion. 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? Our prediction was that urea was not going to be able to diffuse through the 20 Molecular Weight Cut Off (MWCO) membrane because urea is too big of a molecule to diffuse through the 20 MWCO membrane’s pores aren’t large enough for the urea to pass through. Our prediction was correct‚ the Urea was unable to diffuse though such a small membrane
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Microbiology UNKNOWN LAB REPORT Kateryna Petrakova INTRODUCTION Microorganisms cause a great amount of diseases. For healthcare providers it is very important to be aware of what organisms are pathogenic and cause a disease and‚ therefore‚ to find an appropriate treatment. Different microorganisms require various environments in order to replicate and to become dangerous for a person’s health. An integral part of any medical treatment is to be able to recognize and
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fill with water‚ Which causes the celery to become harder. 14.Which types of molecules can pass through a lipid bilayer most readily? Water‚ and small molecules 15.Animal cells are permeable to water and urea but NOT to sucrose. The inside of a cell contains 1 M sucrose and 1 M urea and the outside 1 M
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diffusion. a. Molecular weight b. Solute concentration 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? a. Urea was unable to diffuse through the 20MWCO membrane because urea is a big molecule and the 20MWCO membrane pore size was too small for Urea. My predication was accurate‚ as I predicted that Urea would not be able to diffuse through the 20MWCO membrane 3. Describe the results of the
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which way substances will move passively through a deferentially permeable membrane depending on the concentration differences. We used PhysioEx software to examine diffusion. In these experiments we used different sized membranes as well as NaCl‚ urea‚ glucose‚ albumin‚ powdered charcoal‚ and KCl. The step by step process was used by the software so that we could see the different kinds of reactions. According to the data found‚ we found that with high molecular weight compounds are too large to
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