Articles related to "Nucleus"

The cell nucleus may be the most important organelle in the cell for students to understand. It contains the DNA which controls nearly all cell activity inside the cell.

Understanding the structure of the atom is a solid foundation for the study of chemistry. This article describes the components of the atom, and how they affect chemistry

The nucleus of an atom contains protons that are positively charged. Energy is needed to prevent them repelling each other and making the nucleus unstable.

New Zealander Ernest Rutherford made waves in the scientific community in the first couple decades of the twentieth century with his work on the atomic structure.

All organisms are made up of cells. There are single-celled and multi-celled organisms. Here is a brief overview of what a cell consists of, and some of its functions.

Electrons captured in an atom don't fly around in circles as they are often depicted, but rather exist in a particular area around the atom.

Whether you know it or not, eukaryotic cells are the tiny units of life that make up your entire body. Read on and learn more about yourself!

Nuclear magnetic resonance imaging provides safe nonintrusive medical diagnostic images of the interior of the human body. How does MRI work?

Microtubules are rigid protein tubes that radiate from the cell center and provide the tracks used by motor proteins to move organelles and molecules to the cell surface.

Once female and male gametes (egg and pollen) have formed, pollination is the process that brings them together so fertilization may occur.

J. J. Thomson and Ernest Rutherford pioneered studies of atomic structure, but their early models of the structure of the atom had serious flaws.

Alpha particles are emitted from a radioactive substance by way of quantum tunneling and is governed by a statistical look at the strong nuclear force.

On 3/9/2009 President Obama of the USA issued a Presidential Order that permits federal funding for studies of embryonic stem cells. What is the meaning and significance?

Nuclear magnetic resonance, a resonance of the nucleus of atoms in magnetic fields, is the fundamental physics behind Magnetic Resonance Imaging and NMR spectroscopy.

From the smallest bacterium to the largest plants and animals they are foundational and basic - they are cells. Explore cell uniqueness, similarities and differences.

In order to understand many phenomena in the study of chemistry it is important to know how atoms are made up.

ATP is produced in cellular metabolism by using the high energy of valence electrons around carbon and hydrogen.

Atoms join together to form molecules, but how are they held together?

Bohr's atomic model explains how electrons jumping between orbits in atoms cause emission and absorption line spectra and why each element has its own spectral signature.

Two years after acute, uncomplicated lumbar disk herniation, there is no difference in outcomes between surgical treatment and conservative management.

Genetics is the branch of science concerned with heredity in organisms, such as humans. What are genes, DNA, chromosomes and proteins - and where are they stored?

Hubert Mack Thaxton, an African American physicist who did fundamental work in nuclear physics and applied work in electronics and acoustics, faced racial discrimination.

The tough fibers that span cells and hold the nucleus together are intermediate in diameter between thin actin microfilaments and thick microtubules of the cytoskeleton.

Molecular studies, in this case of the junk DNA in animal cells, can show how long ago animals shared a common ancestor.

Early in the 20th century, it was accepted that matter was composed of atoms. But what exactly was an atom? Ernest Rutherford would have something to say about that.

A look at the structural components of eukaryotic and prokaryotic cells and the differences between the two types of cell.

Atoms are an intermediary step between fundamental particles and the material objects that make up our large scale world. This is a brief primer on the atom.

Fundamental constituents called fermions bind together and form composite particles. These particles constitute most of the mass of atoms.

New research shows that the egg can wind back the years by re-setting the age of a sperm and optimize the chance of a healthy baby.

Organelles allow for many of the different required functions of the eukaryotic cell to be performed in specialized subcellular structures.

Protein tubes and fibers help to assemble and move organelles to cellular locations. These protein aggregates make up the cytoskeleton.

Paul L. Appleton managed to take a 'close-up' photo of the colon of a mouse, and for this achievement he won a prize on September 21st in New York.

Food is one of the most potent stimuli that can "excite" the brain. However, once stimulated, the only way of satisfying a craving is to consume that food item.

The Bohr model of the atom was a major leap forward in our understanding of atomic structure and quantum mechanics, but it was not the final answer.

Both plant and animal cells are eukaryotic, with many similarities, but there are also key differences between the cells of plants and animals. Here is a summary.

In 1932, James Chadwick proved that the atomic nucleus contained a neutral particle which had been proposed more than a decade earlier by Ernest Rutherford.

An order of magnitude is another term for a scale of ten, and it takes 16 of them to go from the familiar world of everyday life to the smallest scales known to science.

Brief biography of scientist Baron Ernest Rutherford whose work formed the basis of nuclear physics, best known for atom planetary model and atomic nucleus discovery.

There are only two basic types of cells, primitive prokaryotes and the more complex eukaryotes. Here are the main features that distinguish these cell types.

Cells that are small and primitive, or large and more complex, are organized to promote their sustenance and survival. Even the simplest of cells are very complex.

It all begins with the fusion of a haploid sperm cell provided by the father and the haploid ovum of the mother. Gametes unite when the nuclei of sperm and egg merge.

In the final decades of the nineteenth and first few decades of the twentieth centuries, physicists would begin to unlock the mysteries of radioactivity.

Genetics is concerned with how traits are passed on through generations. This information, genetic material, is stored inside cells, working units that make up organisms.

Nosema apis has long been known as an intestinal parasite of European honeybees. Nosema ceranae seems to be new and may be causing colony collapse disorder.

Many people are interested to learn about their national origins. Now through a home DNA test you could find your true Native American or other ethnic heritage.

Somatic Cell Nuclear Transfer (SCNT) a process that scientists use to initiate cloning is being used to create stem cells.

There is an ordered regularity to the pandemonium of life on Earth.

The neutron is one of the most common particles of matter, and it is integral to the formation of every element other than hydrogen. Find out why.

Several scientific tests show the Big Bang Theory provides a true vision of the Origin of the Universe to within 1/100 of a second after The Bang

You are recycled stardust. The atoms in our bodies were manufactured in stars or supernovae and recycled by supernova explosions.