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What are some types of forensic science?

Anthropologists have expertise in both archeology and the human skeleton. Those who specialize in digital and electronic forensics find clues in computer and phone files, and forensic engineers tend to use physics and chemistry to aid investigators in the legal system. Odontologists, or forensic dentists, assist investigators by studying bite marks and skeletal dental remains, while forensic pathologists determine the causes and manners of death. Those who specialize in questioned documents not only study handwriting and indented writings, but also classify typewriters and computers. Toxicolog..

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How does the transfer hydrogenation of olive oil work?

A fully saturated fatty acid has a chain of carbon atoms, with each carbon atom bonded to two other carbon atoms and two hydrogen atoms, except for the last, which is bonded to one carbon atom and three hydrogen atoms. The fatty acids in olive oil are mostly monounsaturated, which means that two adjacent carbon atoms along the chain are each bonded to only one hydrogen atom, but have a double bond with each other. Transfer hydrogenation causes one hydrogen atom to bond with each of these double-bonded carbon atoms, reducing their bond to a single bond and saturating the fatty acid with hydroge..

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Where do you get liquid nitrogen?

One can make liquid nitrogen at home, but in reality, it isn't actual liquid nitrogen, but rather temperature-controlled alcohol. This cryogenic alcohol can be used in chemistry projects just as liquid nitrogen would be used, although it is not intended for use with food.\nLiquid nitrogen is used to manufacture ice cream. It is also used in laboratories to preserve blood and tissue samples.

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How do steroid hormones exert their action?

Hormones are regulatory chemicals that are mainly secreted by the endocrine glands. Depending on how they impact their target cells, hormones can be classified into three types: peptide, amine and steroid. Each of these hormonal types has its own mechanism of action, which pertains to a series of interactions through which the hormone induces its biological effects.Steroid hormones have to first detach themselves from their carrier proteins before they can pass through a target cell's plasma membrane, which forms the boundary between the cell's external surroundings and its internal ..

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What is the formula for fluorine gas?

Fluorine is a highly reactive and very corrosive element. It can form reactions with both organic and inorganic substances.\nDiscovered by Henri Moissan in 1886, fluorine is found in minerals, such as fluorite and cryolite. It also is found in the earth’s crust. Fluorine and its compounds are used in many applications, including in rocket fuel, uranium purification, refrigeration systems and etching solutions. It is also added to water and toothpaste.

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How many neutrons does beryllium have?

Beryllium has a density of 1.85 grams per cubic centimeter, and its boiling point is 4,480 degrees Fahrenheit. In nature, minerals such as beryl and emerald contain the element beryllium. However, it was not until 1828, when two chemist independently isolated beryllium from beryllium chloride, that the element was created in a pure form. In the nuclear industry, beryllium serves as an alloying agent with metals such as copper and nickel, and it is used in structural parts for space vehicles.

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What eats a fennec fox?

Scientists know very little about the lives and ecology of fennec foxes, so the total number of predators that feed on the foxes remains unknown. Studies have shown that fennec foxes are quick and agile, which makes them difficult prey to catch. The fox's nocturnal behavior and physiological adaptations to the harsh desert habitat, such as large ears, sand-colored fur and the ability to survive without water for extended lengths of time, further increase the fox's chances of surviving predators.

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What happens when iron reacts with vinegar?

The vinegar removes the iron's protective coating, causing the metal to rust. The acidity within the removed protective coating facilitates the rusting process. The oxygen then mixes with the iron, which is what causes the resulting exothermic reaction. When iron rusts, four iron atoms react with three oxygen molecules to form two rust molecules. The experiment using steel wool or an iron nail and vinegar can be performed in 15 minutes.

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What is the difference between heterozygous and homozygous individuals?

An allele is a genetic trait that provides a small difference between several examples of a species, such as skin pigmentation or blood type. Most of the time, this difference is so small as to be invisible without scientific tools. In the case of blood type, microscopes or chemical tools are required to determine which blood type an individual person has.\nThe reason a gene can have two different alleles in a single individual is because most multicellular organisms, like plants and animals, have two sets of chromosomes. This allows the possession of two different copies of the same gene in a..

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What is the mission of the NASA Mars Exploration Rovers?

The robots launched in 2003 were exploring opposite sides of Mars that may have once had liquid water. One rover was sent to Gusey Crater, an impact crater in which a lake may have formed at one time. The other went to the Meridiani Planum, where the presence of the mineral hematite indicates a possible wet past. The rover robots search for and categorize soils and rocks to give NASA scientists clues about any past presence and activity of water. One of the rovers, Spirit, was silent as of fall 2015.\nThe goal was for the two original rovers to travel about 44 yards in day for a total of 3/4 a..

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