feeding and nutrition

Nutrition is a process by which we obtain matter and energy.Nutrition is an involuntary and inconscious process.Diferents organs and systems intervene in it.
Nutrients are chemical substances from which we obtain energy.These nutrients are contained in the food.
Feeding is a conscious and voluntary act.

THE WHEEL OF THE FOOD

The wheel of the food is a scheme that classifies the food in five groups:


Group 1 : regulatory food (fruit and vegetables). They contribute vitamins and minerals.

Group 2 : energetic food (bread, other cereals and potatoes). They contribute carbohydrates.

Group 3 : structural food (milk and derivatives). They contribute calcium and proteins.

Group 4 : structural food (meat, fish,eggs). They contribute proteins.

Group 5 : energetic food (food containing fats and food containing sugar). They contribute fats and carbohydrates.

A varied nourishment has to include food of all the groups of the wheel, in the adequate proportion.

FIND THE NUTRIENTS

It is important to know that some foods fit into more than one nutrient group. The examples we have given are for foods that are particularly rich in these nutrients.

-This section belongs to Carbohydrates: cereal, potato, bread...
-This section belongs to Vitamins and Minerals: pineapple, strawberry, banana, lettuce,tomato...
-This section belongs to Calcium: yoghurt, cheese, milk...
-This section belongs to Fats: ace-cream, cookie, chocolat...
-This section belongs to Protein: fish, egg, flesh...

Neon

Neon is the chemical elemnt that has the symbol Ne and atomic number 10.
Neon was discovered in United Kingdom by Ramsay and Travers.It´s a rare gaseous element: in the universe there is 0,13% of neon. It´s density is 0.9 g/l. Its melting point is -248.59°C and its boiling point -246.08ºC.
Uses:
Althought neon a advertising signs account for the bulk of its use, neon also functions in high-voltage indicators, lightning arrestors, wave meter tubes, and TV tubes. Neon and helium are used in making gas lasers. Liquid neon is now commercially available and is finding important application as an economical cryogenic refrigerant.

James Prescott Joule

(1818 - 1889)
He was a very important physicist in his time. He´s famous by his investigation in electricity and thermodynamic.
Joule studied the nature of the heat and he discovered his connection with the mechanical work. This led him at the theory of energy´s conservation. It was the first law of thermodynamic. In his honour, the international unit of energy was call joule.
James discovered the connection of the electric current of the resistance with the evaporated heat, called Joule´s Law.
He cooperated with Thomson in the investigation of the cooling of gas.They discovered the Joule-Thomson´s Efect.

A scientist shares his thoughts on why research in the sciences matters

Jesus Pando is a cosmologist at DePaul University in Chicago, Illinois. His research includes studying what’s called the Cosmic Microwave Background Radiation, the earliest light we can see, just 300,000 years after the Big Bang. Earth & Sky caught up with Dr. Pando at a meeting of the Society for the Advancement of Chicanos and Native Americans in Science. He said that basic research should be supported for more than just its immediate applications.

Jesus Pando: I think instead, you appeal to the poet, to the philosopher in people. People have always looked at the stars, and wondered what it was that was there. I think that everyone has curiosity. Everyone wants to know about the universe around them. And I think the way you justify basic research is that we are satisfying that curiosity that all of us, I think, have. All of us are interested in how life began. All of us are interested in how the universe began. All of us are interested in these kinds of things. And we’re interested in them certainly from a practical point of view, but also, I think, just because we’re curious people.

That was DePaul University cosmologist Jesus Pando.
Our thanks today to Research Corporation, America’s first foundation for science advancement

Hi! teachers and students!
My first work of Physics and Chemistry is of the matter.
The matter is a one part that separates for to analyze the substances that it contais.

•State of the matter:
- Solid.
- Liquid.
-Gaseous.

•The aspect of matter:
-Heterogeneus: is this that don't represent one aspect uniform.
-Homogeneus: is this that represent one aspect uniform.

•Simple substances and compounds:
-Substance simple is one substance pure that is formed for only type of element.
-Compounds is one substance pure formed for two or more combined elements.

Scientists also play with words: have a go!

Molecular level

The molecules are links of different atoms. The possibility that there exists life based on other different chemistries is not known. The molecular level is till now the only one that one has found in space. The molecules that living beings form are known as organic macromolecules principles, and can be:
- organic: present especially in the alive matter. The organic macromolecules are: glícidos, lípidos, proteins and nucleicosacids .
- inorganic: presents in the alive matter and in the inert one. They are the water and you them work out mineral.

The class of Biology

Hello! teachers and students.
My topic of this month is on the class of Biology.
The class is very cheerful but the subjet is difficult.
In class we study the cells , the organ sistem and the funcion(s) of this.
After we go to study the nourishment humanizes.
The class of Biology is bilingual. We speak in english but what we don't understand... we ask.
Now we are study the organ system:
- muscular.
- skeletal.
- nervous.
- endocrine.
- locomotor/muscoloskeletal.
- digestive.
- respiratory.
- urinary/excretory.
- circulatory.
- reproductive.

A drop of lemon to cheer up the blog

The cell: his parts and his functions

-CELL MEMBRANE: It allows the communication between the cell and his environment. It´s principal functions are: To protect the cell, to regulate the traffic of substances from the exterior and towards the interior of the cell.

-CYTOPLASM: It places between the plasmatic membrane and the nucleus. In it they find the nutrients that managed to cross the plasmatic membrane to come to the organells of the cell.


-CITOESQUELETON: He contributes to the integrity of the cell defining his form and distribution. It plays a role very importantly both in the cellular division and in the transport between cells.


-NUCLEUS: It controle the cellular physiology, the nucleus has ovoid or rounded form. It contains the DNA or genetic code.

-RIBOSOMES: Their function is to create proteins from the information that comes to him from the DNA.


-GOLGI APPARATUS: It is shaped by a set of bladders. It´s function is to store temporarily the proteins and to intervene in the processes secretores of the cell.

-MITOCHONDRIA: they never remain static; they moving across, changing form and being fused by other mitochondria. Their principal function is to provide energy to him.

-CENTRIOLO: To the set two these it is named diplosoma, and plays an important role in the cellular division (mitosis)

The role of water or of humidity in climatic cycles has already been proved. But we know far less about the role of salt. Yet it plays a vital part in the density of seawater, which conditions the direction of the currents. The SMOS satellilte, launched by ESA, tests soil moisture and ocean salinity.