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What vessels is responsible for gas and nutrient exchange with each of the body's cells?
The capillaries are responsible for gas and nutrient exchange with each of the body's cells.
What is the function of each chromosome?
What is the function of each chromosome?"
Does changing the amount of each ingredient change how the slime turns out?
yes
Describe the aseptic technique that would be used when flooding the agar plate with bacteria?
An agar plate was flooded with a culture of a species of bacterium usually found in the mouth. Four steriled paper discs, A, B, C, and D, each containing a different brand of mouthwash, were then placed on the agar plate. The drawing shows the appearance of the plate after it had been incubated below body temperature for three days, this is to ensure that the bacteria are not harmful to humans. Describe the aseptic technique that would be used when flooding the agar plate with bacteria
What is the study of the each structures function?
The study of how structures function is called physiology.
What purpose does the nutrient agar plate serve?
PREPARATION OF NUTRIENT AGAR Bacteriological media come an a wide range of types. Nutrient Agar is a complex medium because it contains ingredients with contain unknown amounts or types of nutrients. Nutrient Agar contains Beef Extract (0.3%), Peptone (0.5%) and Agar (1.5%) in water. Beef extract is the commercially prepared dehydrated form of autolysed beef and is supplied in the form of a paste. Peptone is casein (milk protein) that has been digested with the enzyme pepsin. Peptone is dehydrated and supplied as a powder. Peptone and Beef Extract contain a mixture of amino acids and peptides. Beef Extract also contains water soluble digest products of all other macromolecules (nucleic acids, fats, polysaccharides) as well as vitamins and trace minerals. Although we know and can define Beef Extract in these terms, each bach can not be chemically defined. There are many media ingredients which are complex: yeast extract, tryptone, and others. The advantage of complex media is that they support the growth of a wide range of microbes. Agar is purified from red algae in which it is an accessory polysaccharide (polygalacturonic acid) of their cell walls. Agar is added to microbiological media only as a solidification agent. Agar for most purposes has no nutrient value. Agar is an excellent solidification agent because it dissolves at near boiling but solidifies at 45oC. Thus, one can prepare molten (liquid) agar at 45oC, mix cells with it, then allow it to solidify thereby trapping living cells. Below 45oC agar is a solid and remains so as the temperature is raised melting only when >95oC is obtained. In this experiment each student will prepare 200 ml of Nutrient Agar to be used in Experiment 4. In subsequent experiments, the media ingredients can be found in the Appendix. It is important for you to know how each medium works: what is the energy source? what is the carbon source? what is the nitrogen source? does the medium have selective or differential ingredients? why can only some types of bacteria grow on the particular medium? MATERIALS 1. Electronic or beam balances. 2. Weigh boats, tongue depressors. 3. Tripods, asbestos wire-gauze, asbestos gloves. 4. 10 ml nonsterile pipettes. 5. pH paper or pH meter with standard buffers. 6. 4 13x100 mm screw capped culture tubes. 7. Graduated Cylinder, 250 ml. 8. 2 500ml Erlenmeyer Flasks 9. Beef Extract, Peptone, Agar. 10. 3 N HCl, 3 N KOH. 11. 16 x 150 mm screw cap culture tubes. 12. Nonabsorbent cotton and gauze to make cotton stoppers. Nutrient Agar Beef Extract: 0.3% Peptone: 0.5% Agar: 1.5% PROCEDURE 1. You will be making 200 ml of Nutrient Agar. To weigh out Beef Extract, first tare a tongue depressor, then dip it into the Beef Extract and weigh. Adjust the amount of Beef Extract until the correct amount is obtained. Be sure to be careful not to get Beef Extract on to the balance! You need to weight out enough Beef Extract to get a 0.3% solution. Place the tongue depressor into the flask, beef extract side down. 2. Tare a weigh boat and weigh out enough Peptone and add that to the flask. 3. Add 200 ml of distilled water and swirl to dissolve the peptone and beef extract. Check the pH, it should be 7.0. 4. Tare a weigh boat and weigh out enough Agar and add that to the flask. 5. With a Bunsen burner, tripod, asbestos wire-gauze, heat the medium to boiling to dissolve the agar. CAREFUL: 1) keep the rotating the flasks to prevent the agar from cooking onto the bottom of the flask and 2) watch out: boiling agar can froth and boil out all over the lab bench. As soon as it begins to boil take it off the heat and put it on to the bench. Allow it to cool a few minutes. 6. While the agar is still warm, but not hot, pipette 3 ml each into 4 13x100 mm screw cap culture tubes. 7. Label the flask and your tubes with your name. 8. After preparation of your medium, the instructor will take you to the autoclave. 9. Place your media in the autoclave with those of the rest of the class. 10. After discussion of the parts of the autoclave, autoclave the medium for 20 minutes. 11. The media will be saved and used in Experiment 4.
What is function of agar plate?
The primary function of the blood in blood agar is to provide a source of nutrition to the culture. In addition, the presence of blood provides a major diagnostic tool in the form of hemolysis. If the blood is hemolysed, and to what degree there is hemolysis, this helps divide several major classes of bacteria from each other.
What vessels is responsible for gas and nutrient exchange with each of the body's cells?
The capillaries are responsible for gas and nutrient exchange with each of the body's cells.
What has a definite amount of each ingredient?
compund
What is the function of each chromosome?
What is the function of each chromosome?"
How much is a unit of fertilizer in kilograms?
Typically fertilizer recommendations for field crops are made in lbs of the fertilizer per acre. Example - 200lbs/ac of 12-12-12 (this would supply 20 lbs N, 20 lbs P, and 20 lbs K per acre).The Analysis (X-X-X) shows us what PERCENTAGE of each nutrient is available by weight. Example; 100lb bag of 20-20-20 spread out over an acre will provide 20lbs Nitrogen, 20% lbs Phosphorus, & 20lbs Potash (PER AREA) of the total weight of the bag, therefore an acre would receive 20lbs of each nutrient.Respectfully, the above (answer) would yield 24lbs/acre of each. If the analysis were 10-25-50, the amount of ACTUAL AVAILABLE NUTRIENT per bag (in a 100lb bag) would yield 10lbs N, 25lbs P, & 50lbs K. Keep in mind that the pellets are composed of fillers & binders.
Possible effects of too much of each nutrient?
Obesity, Vitaminosis
What does EAR in nutrition stand for?
estimated average requirement (for each nutrient)
What is the function of each part of the lever?
What is the function of each part of the lever
What is the function of each part of a lever?
What is the function of each part of the lever
How does changing the amount of each ingredient change how the slime turns out?
yes
Does changing the amount of each ingredient change how the slime turns out?
yes
