Blog Page 6

What is Taught in a Flight School Ground Course on Landing


What is Taught in a Flight School Ground Course on Landing

    Importance of Flight School Ground Course on Landing

    Landing is by far the most demanding as well as dangerous phase of flight as the aircraft comes back from the freedom of three dimensional motion in the air to touch down on firm ground.

Sugar – The Truth


Among fitness expert’s common concerns is that just as many people aren’t aware of the hidden dangers posed by excessive sugar consumption.

Would it surprise you to learn the most common addiction is today’s society is sugar? Sadly, society views a sugar addiction as harmless. A few people realize they are addicted to sugar and make little jokes like, “Gotta satisfy my sweet tooth”. They crave sweet foods like alcoholics crave beer.

Research conducted using laboratory rats determined that behaviourally, sugar acted very similar to narcotics in the brain.

The History of MtDNA and the Story of Mitochondrial Eve


The History of MtDNA and the Story of Mitochondrial Eve

Mitochondrial DNA (or mtDNA) is the DNA we inherit from our Mothers, and is held in a unique circular strand in small tubular packets known as mitochondria that function in a similar way to batteries in the cytoplasm of cells. If you were to trace the matrilineal line all the way back to the most recent common ancestor you’d reach the DNA of Mitochondrial Eve.

Eclipses and How They Occur


What is an eclipse and how does one occur? This is quite a common question and today it is possible to observe and understand these phenomena better as we have some amazing tools to study them.

Myths and fears

There was a time when eclipses were regarded with fear and apprehension. Even today, there are some cultures of the world where one of these amazing phenomena is considered an unholy celestial event with satanic overtones.

It was not until Galileo invented his telescope that people began to look upon these events in a new light.

The History of Y-DNA and Y-Chromosomal Adam


Y-Chromosome DNA or Y-DNA is the DNA carried down the direct paternal line, and the DNA that belongs to males only. Y-DNA is inherited from a man’s father, who got his Y-DNA from his father, all the way back to the end of the line. Y-DNA is only inherited through that direct line, and therefore not inherited from an individual’s mother’s father.

In humans, the Y-DNA chromosome spans around 58 million base pairs, which results in it representing approximately 2% of the total DNA in a male cell.

How to Use a Micropipette?


Micropipette is a laboratory equipment piece designed to transfer extremely small amounts of liquid. This equipment is as common as the microscope and has it’s applications in analytical chemistry and micro biology besides being used in medical laboratories. This is used to transfer anywhere between 1 to 1000 micro litres of liquid. That is a small amount of liquid and thus requires a pipette with a great deal of accuracy and precision. In addition it also requires a skilled technician to operate the pipette as the slightest error can cause the reading to differer drastically (specially true for micro pipette since dealing with small amount of liquid).

What Types of Microscopes Are There?


There are various types of microscopes that are majorly used in the light or beam microscopy. These among other popular types include, but not limited to the following: handheld or pocket microscopes, digital, stereo, and compound microscopes. Among the alongside mentioned types, it is important to know that there are those that are used for both personal hobby as well as class work. On the other hand, there are also those that can be used for biological purposes.

Other than the light microscopes, it is equally imperative to mention about the electron microscopy, whose developments are always very exciting especially when it gets to scanning the objects and/or images.

Below is the description of some of the most common microscope types:

Compound light

This is one type of microscope with two eye pieces (binocular).

Corundum Mineral


Better known to the public as sapphire and ruby, the mineral species corundum is a widely distributed oxide of aluminum which ranks next to diamond in hardness and sometimes occurs so abundantly that it is mined for abrasive purposes. However, clear gemstone varieties are far less common than the course abrasive types, one of which “emery” is familiar to craftsmen as the coating on emery paper and abrasive wheels. In North America, much abrasive corundum has been mined from deposits in Canada and the Eastern part of the US, while clear gem quality material has been obtained in large quantity from Montana.

Some specimens exhibit the beautiful effect known as “asterism”, forming the ever popular star sapphire and star ruby.

By custom, the individual species name ruby is applied only to gem material of pure intense red, all other colors being sapphire.

The Challenges of Staying Still


When we were hunter gatherers, if the geography of a place didn’t suit us we would move on to find one that did. Then, with the advent of agriculture and irrigation it wasn’t all beer and skittles and spare time. When we decided to stop moving and settle an area there were some major challenges to overcome. But overcome them we did…

Early Agriculture
Of the four species of humans that existed in the Paleolithic era, only one made it to the Neolithic: Homo sapiens sapiens. The transfer from hunter gatherers to agricultural societies is generally agreed to be sporadic and potentially undesirable in the early stages with some attempts being abandoned.

It was surprising to learn that the average height of the hunter gatherer population was 178cm for men and 168cm for women.

The State Of The World To The Lonely Electron


With respect to a Lone Electron universe, let’s consider…

ACCELERATION/DECELERATION: None. The same argument applies as with velocity.

ARROW OF TIME: If there is no time experienced by the Lone Electron, then there can be no arrow of time either. In short, the Lone Electron has no experience of a past, present, or future.

CHARGE: Yes, the electron has a charge of minus one or in other words a negative charge of one unit. However, in order for charge to be meaningful, it has to be acting with or against another charge of which there is none.