Foresic chemistry A

100問 • 2年前

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It is a color brown superficial veins during the process of decomposition that develops on both flanks of abdomen, root of the neck and shoulders.

Marbolization

Time when changes if whole body grossly swollen and disfigured, hair and nails loose, soft tissues and discolored.

72 hours

It is the death of individual cells that usually occurs at about___.

3-6 hours

The different test to determine peripheral circulation are the following, except

Winslow’s test

A person, by reason of his special technical training or experience, can be permitted to express his opinion about scientific issues involved in a lawsuit. Legally speaking, what is the best description of this person?

Expert witness

Is defined as that branch of chemistry which deals with application of chemical principles in the solution of crimes?

Forensic Chemistry

This scientific equipment is used for the qualitative and quantitative determination of a volatile or non-volatile compound based on the chromatographic separation of its components.

High powered Liquid Chromatography

This scientific equipment is used for the physical identification of various questioned specimens. It is used To produce sticking images over a wide range of magnification on rough or covered surface of minute specimen such as hair, fibers, paint particles, drugs metal etc.

Scanning Electron Microscope

It is used for screening of abused urine samples.

Enzyme Multiple Immuno Assay Technique

It is used for the qualitative and quantitative analysis of organic compounds.

Ultra Violet Spectrophotometer

Used for the identification of pure organic substances. It identifies organic substances particulary abused drugs and explosive ingredients based on their characteristics functional groups.

Fourier Transform Infrared Spectroscopy

May be defined as the means sanctioned by law, of ascertaining in a judicial proceeding the truth respecting a matter a fact, wherein scientific knowledge is necessary?

scientific evidence

Is a branch of Forensic Chemistry that deals with the scientific examination of drugs and volatile substances.

Drug Identification

Is a method employed to confirm the results of the screening/preliminary test. This tes involves the application of an analytical procedure to identify the presence of a specific drug or metabolites.

Confirmatory test

Is produced when the gun is held from about 2 inches to the maximum of 8 inches. The smoke and soot from the burned pores are deposited around the hole of the entrance producing a dirty appearance.

smudging

The test is designed to determine the presence of the gunpowder nitrates on the hands of the alleged shooter.

Dermal Nitrate Test

is a violent bursting or expansion caused by the release of mechanical, chemical or nuclear energy from a confined area.

explosion

Is comprehensive analytical approach by understanding the fundamental property of fire by determining the chemistry of fires, fuels, and combustion?

Fire Investigation

Is defined as any impression, cut, scratch, gauge, or abrasion or any other marking left on an object by another harder object or instrument.

Tool Marks

Is an inorganic substance in a condition which is continuous with, and analogous to, the liquid state of the substance, but which as the result of reversible changes in viscosity as to be for all practical purposes, rigid. .

Glass

Is a method of scientific examination of evidence using ultraviolet light. Documents, weapons, chemicals, minerals, petroleum products and other items of evidence should be observed routinely under the ultraviolet lamp.

Ultraviolet examination

Also known as Acid-etching method is a techniques employed in number restoration which involves the application of chemical solution on the metal surface where the serial number is normally located.

Macro-etching

Is a scientific study of poisons, their nature, properties, effects and detection and the treatment in case of poisoning?

Toxicology

Is a substance that when introduced into or absorbed by a living organism causes death or injury?

Poison

Is the quantity of medicine to be administered at one time?

Dose

Is any substances which can be administered to correct or alleviate the disease or disordered state of the system?

Medicine

Is a science which deals with the study of the dosage of medicine to be administered within a certain period.

Posology

Is a chemical substance found in all cells whose composition has been passed on from parent to their children.

Deoxyribonucleic acid

This term is used to describe a broad scope of laboratory tests which used specific antigen and serum antibody reactions.

Serology

Presumptive test for the presence of blood.

Benzidine Test

Using phenolphthalein and hydrogen peroxide forming pink coloration due to the presence of peroxidase (enzyme) activity of the blood hemoglobin. a. b.

Benzidine Test

A spray reagent used to test for the presence of blood even if the blood is not visible under ordinary light. This viewed under ultraviolet light?

luminol test

Is the viscid albuminous fluid with a faint grayish-yellow color with a chlorinous-fishy odor and contains spermatozoa, cells, lecithin bodies, hormones and other substances.

semen

A black discoloration produces around the gunshot hole when the gun is held about 2-8 inches to the victim. .

Smudging

How many percent is the NaNO3 composition of black powder?

DPA and determining gunpowder means?

Diphenylamine

Who is the first person who used the paraffin test for the purpose of collecting residues from discharge firearm?

Dr. Iturriouz

DPA is also known as?

Lung’s reagent

Balistite, axite and ambertite are example of?

Smokeless powder

The following can affect the presence of powder residues, except,

Parrafin

It refers to a rapid combustion, decomposition of gases and consequent/violent increase ofpressure, usually causing a loud report.

Explosion

The compositions of black powder are the following?

c. both a and b

How many percent is the sulfur composition of black powder?

It refers to low explosive which make up the charge to fire the projectile from weapon.

d. both b and c

A mercury fulminate is as example of what explosive?

Primary

Red Blood Cells contains antigen or the so called?

Agglutinogen

Smokeless powder was first used in what year?

1864

In blood grouping, if anti serum A and anti serum B has a reaction or clump with the sample blood,the blood group is?

Group AB

In blood grouping, if anti serum A and anti serum B has a no reaction or clump with the sampleblood, the blood group is?

Group O

Where can be found the antigens?

Red blood cells

Under this process, if human red cells is mixed with its own serum or the serum of a similar group,the cells remain even. If the cells are mixed with the serum of another group, cell clumps.

Agglutination

It is a condition especially to very young men that there is a presence of semen without spermatozoa.

Aspermia

What is the normal quantity of seminal fluid in a single ejaculated.

2.5- 5cc

It is the major component of a glass.

silica

It is a super cooled liquid which possesses high viscosity and rigidity

Glass

Glass is usually composed of SiO2 and B2O3. SiO2 means?

Silica

This refers to analysis of glass in which the effectiveness lies on the trace elements, this is done by analyzing two sample of glass whether it is common.

Spectographic Analysis

The most sensitive method of determining differences of composition in glass samples dependsupon the study of?

Physical properties of Glass

This refers to analysis of glass in which it is done through the determination of its pattern and composition.

X-ray diffraction Analysis

Extensive studies have been made to glass establish the relationship between refractive index and?

Composition

Refractive index of glass can be measured by what method?

Immersion

An average man has _____ amount of blood

6 quartz

This test for blood may be made by the policeman on the crime scene.

Preliminary test

This type of test is very delicate and never fails to detect blood.

Benzidine Test

Benzidine solution used in benzidine test is composed of?

d. both b and c

If blood is positive in the application of benzidine test, it gives what color? a.

Blue

If in the application of benzidine test to the blood it gives blue color in phenolphalein test it give what color?

pink

Phenolphtalein test is also know as?

Kastle-meyer test

The following are the confirmatory test for blood except;

Benzidine test

This examination for blood is the most dilcate and reliable test for determining the presence of blood in both old and recent stains.

Spectroscopic test

It refers to the clear liquid of blood that separates when the blood is allowed to clot.

Serum

Blood is red in color due to the presence of?

Hemoglobin

55% of blood of human is composed of?

Plasma

90% of plasma is composed of?

Water

This test determine the protein content of the blood.

Precipitin test

Color of blood when exposed to the atmosphere.

Reddish-brown

Is the amount of blood found in the crime scene can determine the length of time that the victim survived the attack?

Yes, because when person is dead blood pressure falls to zero and bleeding ceases

The following are the importance of the study of blood except,

As conclusive evidence

This kind of projected bloodstain pattern is usually caused by blood from an internal injury mixing with air from the lungs being expelled through the nose, mouth or an injury to the airways or lungs. Expirated spatter tends to form a very fine mist due to the pressure exerted by the lungs moving air out of the body. Small air bubbles in the drops of blood are typically found in this type of spatter.

Expirated spatter

What is the type of bloodspatter wherein the blood of the victim is ejected from the exit wound and travels in the same direction as the bullet?

forward spatter

This refers to the spurt of blood released when a major artery is severed. The blood is propelled out of the breached blood vessel by the pumping of the heart and often forms an arcing pattern consisting of large, individual stains, with a new pattern created for each time the heart pumps

Arterial Spurt

Who is the father of bloodstain patter analysis?

Herbert Leonne MacDonnel

Which of the following is the race determinant part of the hair?

medulla

Is the relationship between the diameter of the medulla and the diameter of the whole hair? Its determination is performed under a microscope with micrometer eyepiece.

medullary index

Fiber is the smallest textile. There are two divisions of fiber these are?

Artificial and Natural

Rate of growth of human hair.

0.4 to 0.5 mm./day

The cuticle of the animal hair is:

serrated

The human hair normally will turn gray at the age of ____ due to decreasing of supply of melanin to hair.

40 years old

In forensic examination, a tip of the hair is examined to determine if it was _______.

cut

It is considered as the highest form of a proof.

Real

He introduced chemical methods in toxicology.

Orfila

What kind of a solution is used in the restoration of serial numbers?

etching solution

It is a biological test for blood?

precipitin test

Police Capt. X conducts a test that will possibly identify blood or determines whether the blood stains really contained blood. This test is called?

confirmatory test

_______was the 1st poison for which the analytical test called a Marsh test was developed by british chemist James Marsh

Arsenic

A german Swiss physician/alchemist who 1st stress the chemical nature of poison and its experimentation. He introduced the dose concept.

Paracelsus

A posion found in a rugby and has been described as a colorless and inflammable liquid that burns with smoky flame

Toulene

In what mode of administration that poison can be absorbed rapidly?

injection

A person who fired a gun would be positively identified when DPA solution is used and the visible result is

Blue specs with tailing

100

A branch of science that treats of the form and quantity of medicine to be administered within a certain period

Posology

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Christian Jay Santos · 18問 · 3年前

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