Bacterial Smears Are Fixed before Staining to? Answer It is important to heat fix the bacterial smear before staining so as to‚ kill the bacteria‚ firmly adhere the smear on to the microscopic slide to prevent washing off during staining‚ and to allow the sample to readily take up the stain. Reference: www2.hendrix.edu What is the purpose of heat- fixing the smear? It helps the cells adhere to the slide so that they can be stained. The purpose of heat fixing is to kill the organisms without
Premium Gram staining Bacteria Staining
purpose of this lab is to isolate a bacterial population from the normal throat flora. A streak plate method will be used to obtain a pure culture of a Gram positive coccus genus of bacteria. Several biochemical tests will be performed to aid in the identification of this unknown bacterium. Biochemical tests are a series of tests used to identify certain bacterium The various tests that are used in this lab are the catalase test‚ oxidase test‚ blood hemolytic test‚ MSA‚ blood agar‚ and PEA/ab
Premium Bacteria Microbiology Gram staining
“Fighting Invisible Killers” Scholastic Scope: The Language Arts Magazine January 2014 Edition‚ pages 5-9 Bacteria surround us every day. These little “bugs” are invisible to the eye and most do not harm us. Many are necessary for us to survive‚ like the bacteria in our stomachs and intestines that help us to digest food. But some bacteria are very dangerous to us. Addie Rereich became very sick in May 2011‚ when she was 11 years old. What started as something that her doctors and mother
Premium Antibiotic resistance
Bacteria are the most numerous type of microorganism found in the rhizosphere of the soil. They produce secondary metabolites which are capable of producing antibiotic which eventually inhibit or kill bacteria. The rhizosphere region of the soil is a highly favorable habitat for the proliferation‚ activity and metabolism of numerous microorganisms. The magnitude of this area depends on the plant and the size of the roots that the plant possesses. Bacteria are among the microorganisms living in the
Premium Bacteria
Bacterial Contamination April 15‚ 2013 Bacteria Contamination The definition of bacterial contamination is food contamination refers to foods that are spoiled or tainted because they either contain microorganisms‚ such as bacteria or parasites‚ or toxic substances that make them unfit for consumption This is very serious and people should take more precaution‚ food contamination is a serious because it results in foodborne diseases that each year affect an estimated seventy-six million
Premium Bacteria Foodborne illness Food safety
Blood Pressure and Pulse Determination National University Bio 202 Human Anatomy & Physiology 2 Lab Report Activity 33A Dr. Alpa Gautam March 6‚ 2012 Abstract The purpose of the paper is to inform and conduct a laboratory report on human blood pressure and pulse determination. Systolic (contraction) and diastolic (relaxation) pressures refer to the ventricular contraction and relaxation. With knowing the two pressures‚ one can distinguish if he/she is at a normal
Premium Blood pressure
hypothesis for the Blood Spatter Lab is that if blood is dropped from a pipette from gradually increasing heights‚ the diameter of the blood drops will increase at a constant rate. The hypothesis was proved correct because in the experiment‚ the higher the height the blood was dropped from‚ the larger the diameter of the blood drop. The data collected in the experiment represents the height the blood was dropped from over the diameter of the blood drop. The data shows that the higher the blood is dropped
Premium
Microbiology 197 Prepared Bacteria Gram Stains (F12) Materials required: * Microscope; clean and properly set up * Immersion oil * Lens paper * Lens cleaning fluid * Microscope drawing forms * Specimens: 1. Bacillus subtilis 2. Staphylococcus aureus. 3. Escherichia coli Procedure: 1. Observe each of slides listed in “Specimens” above. 2. Make your observations using oil immersion (1000X). 3. Using a drawing form draw the organisms
Premium Staining Gram staining Bacteria
Pulse and Blood Pressure Lab (after lesson) Objectives: 1. To allow students to formulate and test hypotheses. 2. To allow students to practice taking pulse and blood pressure. Teacher notes: 1. Briefly review of how to take a pulse and a blood pressure (if necessary) 2. Instruct students to pair off 3. Students will fill out the lab worksheet which will help guide them in the lab. Answers to the questions: Using what you know about pulse and blood pressure‚ form a hypothesis about what
Premium Experiment Theory Scientific method
Unit 10: Blood/Immunology Case Study Lab What were your three diagnoses? 1. Case 1: normal blood smear 2. Case 2: acute lymphocytic anemia 3. Case 3: mononucleosis Journal Questions for lab 1. In what ways do normal red and white blood cells differ? Red blood cells are easier to see under high levels of a microscope and white blood cells are better seen under low levels. Also white blood cells are used to fight off infections as for red blood cells carry oxygen
Premium