Criminalistics part 5and6,2

22問 • 3年前

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it is a presumptive test that reacts with the heme molecule present in blood. A positive reaction gives a pink color.

Phenolphthalein

It is used as a detection method for latent blood in forensic science. Hemoglobin catalyzes the reaction between LMG and hydrogen peroxide, converting the colorless LMG into malachite green.

Leuco-Malachite Green test

also known as hemochromogen crystal assay, is used to determine if blood is present in a sample of interest. This assay is used by experimenters, or investigators of crime scenes, to confirm if an unknown sample indeed contains blood.

takayama test

This is a test for blood in which a small amount of acetone, or propenal, is added to the bloodstain, followed by a drop of oxalic or acetic acid.

Acetone-Haemin Test or Wagerhaar Test.

This test is of value in the determination whether the blood is of human origin or not although the blood of the anthropoid ape and other related animal may give the same result.

Precipitin Test

The blood is compound of certain chemical substances called antigens locates on the red blood cell surface. These blood substances are detected by their reaction.

Blood Grouping

it is described whereby the percentage oxygen saturation of hemoglobin within intact corpuscles can be determined.

spectroscopic method

also called seminal fluid, is a fluid that is emitted from the male reproductive tract, and also contains liquids that combine to form seminal plasma, which helps keep the sperm cells viable.

Semen

it is the medical condition of a man whose semen contains no sperm. It is associated with infertility, but many forms are amenable to medical treatment.

Azoospermia

it is a fluid from the prostate and other sex glands that helps transport sperm out of the man’s body during orgasm. Seminal fluid contains sugar as an energy source for sperm

Seminal fluid

it is defined as a moving form of the haploid cell that is the male gamete. It joins an ovum to form a zygote.

Spermatozoon

it is a single cell, with a complete set of chromosomes, that normally develops into an embryo.

zygote

it is a simple way to determine whether or not a stain sample needs to be collected for further testing.

Presumptive Test

It is a complete semen analysis measures the quantity and quality of the fluid released during ejaculation. It evaluates both the liquid portion, called semen or seminal fluid, and the microscopic, moving cells called sperm.

Chemical Test

A complete semen analysis measures the quantity and quality of the fluid released during ejaculation.

Microscopic Examination

The spermato-precipitins are of value in the identification of seminal fluid in certain cases like, for example, in bestiality where there might be desirable to differentiate between the human seminal fluid from that of the animal.

Biological Examination

A normal result for sperm shape is that more than 50 percent of sperm are normally shaped. If a man has greater than 50 percent of sperm that are abnormally shaped, this reduces his fertility.

Sperm Shape

it is the process when the gel formed by proteins from the seminal vesicles is broken up and the semen becomes more liquid.

Liquefaction

The normal sperm densities range from 15 million to greater than 200 million sperm per milliliter of semen. It is considered that it is a low sperm count if it has fewer than 15 million sperm per milliliter or less than 39 million sperm total per ejaculation.

Sperm Count

has been evaluated for a variety of applications in forensic science and has long been recognized as suitable for the analysis of biological materials.

Raman Spectroscopy

it is used in forensic chemistry to analyze drugs, chemicals, fibers, and paints with unique and characteristic spectral signatures determined for each sample.

Fourier Transform Infrared Spectroscopy or FTIRS

it is commonly associated with the detection of drugs and analytes in forensic science and has been used previously in forensic genetic research for single nucleotide Polymorphism analysis, Short Tandem Repeat (STR) typing.

Mass Spectrometry or MS

Lea set A

Christian Jay Santos · 53問 · 3年前

Lea set A