The most commonly employed chemical test to determine the presence of blood in stain found at the scene of crime is:

Q: write the  protocol for Hexamine silver staining, including their reagents, materials, prinicple,…

A: Grocott’s alkaline hexamine-silver solution undergoes reduction to create precipitates of silver…

Q: Define fluorescent staining.

A: The advent of microscopy started with the development of optical microscopy. Then the level of…

Q: The table below summarizes the results for Millon's test. Provide the correct remarks from the…

A: Millon’s test is an analytical test used for the detection of the hydroxy phenol groups. Since the…

Q: Household Products Color of the solution with indicator Classification (Put a check mark on the…

A: Acids are chemical substances which have the capability of donating a proton and bases are…

Q: Give two reasons for heating the slide after the smear is air dried?

A: Smear is the thin film of the sample that is spread over the slide to be observed in the microscope.…

Q: Transillumination is used clinically for the detection of:

A: Transillumination is an examination that is done with the help of a strong light shining on a…

Q: Why is there a need to use a staining agent in observing the specimen?

A: Staining agent:          The things that owes-out stains were recognized as staining agent,…

Q: When drawing blood for alcohol testing, the suspect’s skin must first be wiped with a(n)…

A: Disinfectants are mostly the chemicals that are usually used for nonliving things.

Q: In four steps, describe the simple staining procedure.

A: A stain is used to clearly view a specimen under the microscope. In simple staining, bacteria are…

Q: Differentiate between negative and positive staining, givingexamples.

A: These are the staining methods that are used to see bacteria under a microscope.

Q: Select all of the following that represent examples of positive stains. A) nigrosin B) methylene…

A: Staining is a technique usually employed to enhance the contrast of specimens in microscopy. Many…

Q: Create paragraphs to differentiate among the following terms: positive stain, negative stain, simple…

A: An organic molecule with a benzene ring, a chromophore, and an auxochrome group is known as a…

Q: Why is it necessary to use immersion oil when the 100X objective is used'

A: Note - we answer one question at a time. Immersion oil is transparent and has specific viscosity and…

Q: How is fluoroscopy different from radiography?

A: Radiography and fluoroscopy are imaging techniques used in the medical studies. The Radiography or X…

Q: omatography with other chromatography

A: Chromatography can be defined  laboratory technique for the sepration  of the mixture. The mixture…

Q: Why is it necessary to know the accurate proportion in mixing bleach and water in cleaning and…

A: Bleach is a strong disinfectant.  It has a active ingredient sodium hypochlorite; an effective…

Q: Ninhydrin Test Samples used:  Egg Albumin Gelatin Dispersion Added reagent: Ninhydrin Solution…

A: Ninhydrin is a general test for proteins and amino acids. It degrades amino acids into aldehydes,…

Q: What is the difference between a Hemin test and a Benzidine test?

A: Hemoglobin is a blood protein that is responsible for oxygen transport in the tissues. Hemoglobin…

Q: What is the difference between an antiseptic and a disinfectant? Can the same chemical be used for…

A: Antiseptic Disinfectant 1.       These can slow down the growth as well as can kill the…

Q: During evidence collection, all body fluids must be assumed to be ___________ and handled with…

A: Body fluids are important evidence to forensic investigators because body fluids contain DNA…

Q: Step-by-step smear preparation of Grams stain

A: Gram staining is a laboratory technique that is used to culture bacteria and identifies two kinds of…

Q: How can you tell that the dark wet spot on the paper towel is fat and not water?

A: The properties of water and lipid are different.

Q: Give three situations where the negative staining procedure would be used.

A: Negative staining is a specimen preparation technique that requires an acidic dye such as India Ink…

Q: Dropping Mercury Electrode

A:

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: Fingerprints on porous surfaces are best developed with___________ treatment.

A: In crime scene, fingerprints can be categorised into three types, Latent fingerprints Plastic…

Q: The acid fast technique is also known as:  A. Ziehl-Neelsen stain B. Auramine-rhodamine stain C.…

A: Acid fast bacteria are gram positive bacteria . They are unique among prokaryotes and normal gram…

Q: Name the frequently used stains in blood smear preparation. Describe briefly and give their specific…

A: Any deviation from the normal is the diseased condition. The disease is caused by many reasons.…

Q: Whole blood collected for DNA-typing purposes mustbe placed in a vacuum containing the…

A: Every individual has unique DNA, just like fingerprints. The smallest coding portion of DNA is…

Q: Positive Staining Negative staining

A: Staining Procedure Dye Charge Of The Chromophore/ Colored Ion Charge Of The Target Cellular…

Q: The primary stain used in the endospore stain is:    A. Carbolfuchsin Stain B. Methylene  Blue C.…

A: To differentiate between the vegetative cells and the endospores, a differential staining technique…

Q: True- False Acetone is the safest solvent for cleaning an objective lens.

A: The micro-organism is the organism that is too small to be seen with the naked eye. It is viewed by…

Q: Blood is stained with stain. a) Methylene blue b) Safranin c) Leishman stain d) Carbol fuchsine

A: Introduction - A blood smear, also known as a peripheral blood smear or blood film, is a thin…

Q: Write the protocol for lactophenol blue stain method indicating; materials,  reagents,  Principle,…

A: Fungi consist of a broad class of organisms from single yeast to multicellular organisms like…

Q: What is the best streaking technique in a culture media? Explain

A: In microbiology, there are five I's that symbolise five different procedures used in the laboratory…

Q: Iodine in Ziehl Neelson’s staining serve as the mordant. True or false underline the word that is…

A: Answer

Q: Give a vivid outline of the Standard operating procedure of neutralization test.

A: The neutralization test is a diagnostic test helps to measure the patient's ability to protect cell…

Q: In staining, why is there a need for contrasting stains?

A: Answer

Q: Good blood film should not cover the entire surface of slide and have .waves and holes

A: Blood is the most essential body fluid in some animals and humans which is involved in delivering…

Q: Write down the materials, reagents, Principle, procedure  and results for Ziehl-Neelsen stain

A: It is a differential staining technique which was first developed by Ziehl and later on modified by…

Q: which kind of sample gives positive result for Molish test?

A: It is a chemical test which is named after the botanist Hans Molisch.  This test involves the…

Q: differential staining procedures

A: Differential staining :  Differential staining is one of the important staining method. In this…

Q: The Duquenois-Levine test is a valuable color test for

A: We can say that, In a forensic chemical analysis of an unknown material, the analytical method is to…

Q: You can perform a specific staining method to confirm the purity on the culture. Describe this…

A: Microscopic samples are generally stained prior to analysis as it enhances their contrast and aids…

Q: How can the thickness of the smear affect the staining procedure?

A: Smear can e defined as the spread of cells in a layer to observe it under microscope. Since, cells…

Q: The Duquenois–Levine test is a valuable color test for___________.

A: In a forensic chemical analysis of an unknown material, the analytical method is to narrow down the…

Q: Congo red is a red acidic stain and methylene blue is a l a bacterial smear with a mixture of eosin…

A: Eosin Methylene Blue (EMB) agar is both selective and differential culture medium. It is a selective…