Define optical density - Study guides, Class notes & Summaries

_______ controls quantity of the x-ray beam, and the number of x-ray photons contained in the beam - mAs _________ is the quality, and alters the amount of photons in the beam and penetrating the ability of the beam - kVp A ____% increase in kVp has the same effect on optical density as doubling the mAs. - 15% A compensating filter is used to create _____ optical density with a body part of _____ thickness. - Uniform, non-uniform A factor that affects the amount of scatter produced is a....

MCB 2610 Lab Question and answers already passed 2024/2025 MCB 2610 Lab: Week 4 What causes bacterial endospore formation? - correct answer nutrient depletion What are the 4 phases of microbial growth? - correct answer (1) lag (2) log (3) stationary (4) death T/F: We will measure the optical density over time to determine growth rate - correct answer true Define generation time - correct answer time required for microbial cells to double in number

True/False: Gram stains and spore stains are examples of simple stains. - FALSE What causes bacterial endospore formation? - Response to environmental conditions, i.e., lack of nutrients What are the 4 phases of microbial growth? - Lag, exponential/log, stationary, death True/False: we will measure the optical density over time to determine growth rate. - TRUE Define generation time. - Time for population to double What does it mean for a culture to be in stationary phase? - Rate ...

What is fermentation - Being able to grow anaerobically in the presence of a suitable organic compound, such as a sugar. Several reduced products are excreted by the cell as a way of disposing of the electrons derived from oxidation. Function and Types of hydrolytic enzymes - Hydrolytic enzymes hydrolyze (break down) complex molecules to get food that can be transported into the cell. 1. Amylase 2. Caseinase 3. Gelatinase Amylase - catalyzes starch hydrolysis. Reacts readily with iodine...

The __________ method is a quick and easy way to isolate bacteria - streak plate in what orientation do you incubate the plates after they have been streaked? - agar half on top what must you do to the loop before every use? - flame sterilize your loop T/F: The last thing you do before leaving the lab is take off your lab coat - False T/F: When performing a T-streak, the loop goes into the tube 3 times (once for each section of the plate) - False T/F: You do not heat a pipette in ...

Radiographer A radiologic technologist who administers ionizing radiation to perform radiographic procedures. They produce radiographic procedures at the request of a physician. Radiologic technology a health care profession that includes all diagnostic imaging technologists and radiation therapists. Radiographers must evaluate an image for _______ quality, _______, and _________ relative to the diagnosis or the reason for the procedure. technical, accuracy, appropriateness ALARA As Low A...

Fiber optics is a communication _______ used to transmit information - Answer medium The information travels in the form of light through _________ - Answer high-purity glass Why does Corning fiber optic solutions use glass instead of plastic? - Answer Because the high-purity glass allows for lower loss solutions When is plastic fiber used? - Answer Used to cover short distances (normally under a foot) What is the unit of measurement for the diameter or a fiber? - Answer (um) micron ...

What is the first rule of laser/gun safety? - ANSWER-Keep your finger off of the trigger What is PFE? - ANSWER-Perifollicular edema - little pink goosebumps What does LASER stand for? - ANSWER-Light Amplification of Stimulated Emission of Radiation When is it okay to do LHR for a client who has been treated with Accutane? - ANSWER-6-12 months List 3 aftercare instructions you would give to a client: - ANSWER-Avoid sun exposure, no exfoliation for 48-72 hours, no hot baths/showers, no...

REHS- RADIATION STUDY GUIDE TEST. How does a microwave oven work? - CORRECT ANSWER -Uses a magnetron, that converts electrical energy into microwave energy. Wave guide tubes direct microwaves to hit a metal stirrer. This breaks the microwave pattern, which is reflected by metal compartments which forces them to concentrate on food being warmed. The water and fat molecules in food absorb microwaves, which cause them to vibrate. This produces heat. How do you test for potential microwave ove...

Moore's Law - correct answer The number of transistors per square inch on an integrated chip doubles every 18 months. Metcalfe's Law - correct answer The value of a network is equal to the square of the number of users connected to it. Nielsen's Law - correct answer Network connection speeds for high-end users will increase by 50 percent per year. ...