Which proteins can be searched? All protein-encoding gene models in the Arabidopsis, maize and rice, as assembled respectively in http:
State the purpose for using preservatives 2.
Compare and contrast the different preservatives used in the laboratory. Properly preserve a fecal specimen and prepare slides for a permanent stained smear. Introduction Trophozoites of intestinal amoebae die and disintegrate rapidly so it is important to achieve adequate and proper preservation when specimens cannot be examined immediately within 30 minutes of passage.
Several preservatives are available. The purpose of fixatives is to prevent deterioration of fragile forms of parasites. Many commercially prepared kits contain a 2-vial method for patients to submit stool specimens.
One vial of the kit contains PVA-fixative and the other contains 5 or 10 percent formalin. It is very important that the proper ratio of fecal specimen and fixative are used. If the patient collects the specimen at home they should be told to fix the specimens immediately after passage.
Some organisms rapidly lose their characteristic morphology. A drop of dysenteric stool is placed on a microscope slide and mixed with three drops of PVA-fixative. The mixture is then smeared over approximately two-thirds of the glass surface and allowed to dry thoroughly preferably overnight at room temperature.
Dried smears remain satisfactory for extended periods. A quantity of specimens is thoroughly mixed in a vial containing three parts of PVA-fixative. Smears for staining can be prepared immediately by spreading a drop or two of the mixture over the surface of a slide.
It is important not to have the smears too thick and to allow them to dry thoroughly. The Trichrome staining procedure is preferred for permanently staining fecal films. It is important that the stained film be protected with mounting medium and a cover slip.
Detection of Occult Blood A. State the principle of the occult blood including the chemical reaction involved. Properly perform and interpret the occult blood test.Introduction: Kinetic energy, a source of energy stored in cells, causes molecules meaning of success essay to bump into osmosis potato lab report each other.
Osmosis Lab. Introduction: there is no net water movement, and the cell is said to be in an isotonic environment.
In this lab we will test samples of potato tissue to see how much water they absorb or release in salt solutions of varying concentrations. This gives us an indirect way to measure the osmotic concentration within living cells.
Hypertrophy means cells growing bigger. Hyperplasia means cells growing more numerous. Atrophy means shrinkage of an organ. Metaplasia is transformation of one type of tissue into another normal type, because genes have been turned-on physiologically and/or mutated.
In this lab activity you will observe the effects of osmosis on plant cells. In the first part, you will use the weight of pieces of potato to see how much water moves in and out of cells in different.
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Nov 11, · In the osmotic concentration lab potatoes were used to see the affects of different concentrations of sucrose on the weight of the potatoes. Solanum tubersum more commonly known as the potato is the fourth most important food crop in the world.