Why is it necessary to flame the top of the bottle before pouring the plate?

Q: Give the COMPOSITION of the ff. Clearing agent: 1. Xylene 2.Toluene 3.Benzene

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Which of the following is an approved sterilant? a. chlorhexidine c. ethylene oxide b. betadyne d.…

A: The process used for the destruction or removal of all the spores, living cells and acellular…

Q: Oven sterilization at 121˚C was performed on glassware for 15 minutes only. Effect:  Rationale:

A: Sterilization  It is defined as the process in which micro-organisms whether bacteria, fungi,…

Q: ВАСТERICIDAL LAMPS 1. орen type (unshielded) неэкранированные 2. closed type, shielded 3. shielded ,…

A: There are general important points : We know that through UV -C that occurs naturally in sunlight…

Q: component used as a solidifying. .-1 agent for media

A: Since there are multiple questions in this particular question I'll answer the first one for you. If…

Q: Silver mat 13 mm : 1:18 eppecetive Nitrate Aqueous lodine 22 moro 2 mm 2 Oppective

A: Disinfectant: An agent or compound that kills the bacteria or makes it functionally inactive. There…

Q: How can we make soap?

A: Soaps are the salts of fatty acids. Soaps are generally used as surfactants for washing cloths,…

Q: Why are only slightly higher atmospheric levels of carbon monoxide gas dangerous? Please, no copy or…

A: Carbon Monoxide (CO) is extremely dangerous gas because of the following characteristics: It can…

Q: _____ kills pathogens and some spoilage organisms but does not sterilize substances. Tyndallization…

A: Sterilization refers to any process that removes, kills, or deactivates all forms of life, in…

Q: ILLUSTRATIONS: 1. Sterilizers seen in the laboratory and their parts.

A: 4 main methods of sterilizarion - physical methods Radiation method Ultrasonic method Chemical…

Q: Strong Iodine Solution USP Formula: Iodine pellets ____ Potassium iodide ____ Purified water ____…

A: Pharmacopeia has a collection of medicinal preparations, dosage forms, information about the purity…

Q: What is the most efficient disinfectant of the following ( Alcohol, chlorine, soap ,hijyn), and…

A: Disinfectants are chemical agents that are built on inert surfaces to inactivate or kill…

Q: What is the physical appearance (solid, liquid, semi-solid) of following media: agar plate

A: The Agar plate is made from mixing agarose and a growth medium onto a petri dish. Agarose is in a…

Q: Why Nitrogen (or Argon) Gas Is Used as a Wine Preservative?

A: Argon is a highly stable, tasteless, and odourless chemical element. Argon is two and half times…

Q: Serial dilution is recommended prior to pour and spread plate. Why is this so?

A: Pour Plate: it is a technique in which A plate made by combining the inoculum which is cooled but…

Q: Unwashed hand Hand wet with alcoholfor 10sec. Handwashing using hand soap for 20 sec

A: Standard laboratory practices are followed to prevent exposure to bacterial cultures.

Q: Choose the combination of answers that most accurately completes the statement.Which of the…

A: Microbial growth is harmful as its presence causes several diseases in humans. Sterilants,…

Q: Which of the following is not used as an antiseptic?   A. Chlorhexidine B. Phenol C. Iodophor…

A: Antiseptics are the molecules or substances which has the ability to slow down or stop the growth of…

Q: Four process that  may be used to refine oil

A: Refining of oil is an industrial process that involves the conversion of crude oil into useful…

Q: Why would hydrogen peroxide be an effective disinfectant?

A: We have to answer why hydrogen peroxide can be an effective disinfectant.

Q: What do to do when the disstillation did not make the sample completely pure? What could have went…

A: Distillation is a process that is based upon the boiling points of various liquids present in the…

Q: What force was responsible for the movement of substances through the filter paper?

A: Filter paper is made up of cellulose and thus functions as permeable membrane and movement of…

Q: What type of wine would be produced if the carbon dioxide was left to dissolve in the wine? Table…

A: The dissolved CO2 gives a hint of tartness and freshness to the wine. It helps to improve the taste,…

Q: 1 mL 1 mL 10 g meat 90 mL 9 mL 9 mL Dilution Factor (df) Final Dilution 1 mL 1 mL 1 mL TNTC 350 45…

A: Introduction :- Dilution factor is the total volume of solution divided by volume of added solution…

Q: tenry filled two jars with the same volume of water as shown in the picture. He placed a lid on J…

A: The experiments are conducted to understand biological and scientific phenomena that take place…

Q: نقطة واحدة the solvent in recrystallization * should not be dissolve the compound to be crystallized…

A: We are authorized to answer one question at a time since you have not mentioned which question you…

Q: why does cheese smell

A: Cheese is a dairy product that is formed by the coagulation of casein(milk protein). It is usually…

Q: Write down the materials , reagents ,instruments,  principle and procedure for Grocott’s hexamine…

A: The Grocott's hexamine silver stain is used to demonstrate fungi. It is a part of histopathology…

Q: What is one advantage of a pour plate over a streak plate?

A: The pour plate method is a technique used to count the number of colony-forming bacteria found in a…

Q: what is oil immersion and why is it used

A: Light microscope is a microscopic instrument which uses visible light and magnifying lens to to view…

Q: Immediately after stirring 1 hour after stiring Original misture Suction filiration Figure 1 Figure…

A: Mixtures are defined as materials containing 2 or more chemical substances mixed together. In case…

Q: Why is it necessary to perform a plate count in conjunction with the turbidimetry procedure?

A: Plate counting is one of the most fundamental techniques used in microbiology. It is used to…

Q: Apparatus used to add a liquid to a solid in the generation of a gas

A: Kipp's Apparatus is used to prepare gases

Q: Why do we add powdered zinc to the nitrate reduction test?

A: Bacteria are prokaryotic simple unicellular organisms. Their mode of respiration may be aerobic or…

Q: SPECIAL METHOD OF WATER TREATMENT AT THE WATER-WIRED STATION 1. boiling 2. softening 3. ozonation 4.…

A: The specialized water treatment usually includes various types of methods such as physical method…

Q: 7.3x105 CFU/ml= Broth culture, how many bacteria would be contained

A: The number of viable bacterial cells in liquid culture is estimated by means of a colony-forming…

Q: How many grams of media would be required to prepare 350 plates assuming 20 mL per plate? O 72 O 112…

A: The preparation of  mentioned Escherichia coli culture media contain 36 grams per litre deionized…

Q: To measure the culture temperature, why is the thermometer placed in a tube separate from the…

A: A microbe or microorganism is a microscopic organism that is too small to be seen with the naked…

Q: Agent Soaps and detergents Acids Actions Uses Advantages Disadvantages Alcohols Oxidizing agents…

A: The microbial growth can be controlled or prevented by the use of antimicrobial agents which can be…

Q: Which among the ingredients of this product is the main preservative? Explain.

A: For centuries, people have been preserving food. It all began with the ancient practice of…

Q: [Ethanol] Vo 0.007 0.06 0.35 0.015 0.11 0.3 0.031 0.16 0.068 0.21 0.25 0.1 0.23 0.2 0.2 0.28 0.3…

A: The Km is the substrate concentration at half-maximal of Vmax. It measures the affinity of…

Q: Alternative name for Moist-heat sterilization Select one: Oven sterilization Autoclaving Ionizing…

A: Sterilization is any technique that eliminates, removes, or disengages every living organism…

Q: why is it necessary to use oil immersion on oil objective ?

A: The oil immersion is the technique of light microscopy, which is used to increase the resolving…

Q: Is it safe to use 100g of Lye (NaOH) as a disinfectant at homes? Justify your claim by computing the…

A: Disinfectant: A disinfectant is a product that kills harmful microorganisms like bacteria and…

Q: What physical factors can influence the activity of a disinfectant

A: Introduction- Disinfection is the process by which we can eliminate the growth of microorganism…

Q: CHLORINATION IS 1. by means of special water treatment 2. the physical method of water purification…

A: Chlorination is one of the methods used for the disinfection of water.  Millions of microorganisms…

Q: a recipe for a reagent that contains 1.5% (w/v) CuSO4.5H20 (FW= %3D

A: