CHEMISTRY
edited
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Homework
1. In the cas…
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Homework
1. In the case of alloys its importance is that for some special applications, a metal by itself can not meet certain requirements and therefore it is necessary to combine it with another. An example can be the Stainless steel (steel by itself can not be used in hospitals because it is oxidized and this oxidation can stay and breed bacteria)
2. Now, the plastics is important because it can be recycle, and recycling helps to the environment because it helps to stop the contamination, without the recycling of plastic some products couldn’t be disposable.
3. the polymers are important because now a days all the things around us are made up of polymers, so without it we couldn’t have all this things.
BIOLOGY
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Homework!!!
Cofactor:
Definition: A cofactor is a non-protein chemical compound that is bou…
Homework!!!
Cofactor:
Definition: A cofactor is a non-protein chemical compound that is bound (either tightly or loosely) to a protein and is required for the protein's biological activity.
...
Examples: Nicotine, adenine, phosphate, dinucelotide, pyrophosphate, etc.
Enzymes:
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are proteins.
Properties:
Properties: They are
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high temperature.
Examples:
Examples: carbonic anhydrase,
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hemoglobin, etc.
Ribozymes:
Definition: is an RNA molecule that catalyzes a chemical reaction.
BIOLOGY
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Cofactor:
Definition: A cofactor is a non-protein chemical compound that is bound (either tigh…
Cofactor:
Definition: A cofactor is a non-protein chemical compound that is bound (either tightly or loosely) to a protein and is required for the protein's biological activity.
Properties: A nonprotein component of enzymes. Many of the coenzymes are derived from vitamins. The coenzymes make up a part of the active site, since without the coenzyme, the enzyme will not function.
Examples: Nicotine, adenine, phosphate, dinucelotide, pyrophosphate, etc.
Enzymes:
Definition: they are biomolecules that catalyze chemical reactions. Nearly all known enzymes are proteins.
Properties: They are specific to one type of reaction. They are denatured by high temperature.
Examples: carbonic anhydrase, alcohol dehydrogenase, cytochromes, hemoglobin, etc.
Ribozymes:
Definition: is an RNA molecule that catalyzes a chemical reaction.
Examples: Peptidyl transferase 23S rRNA, RNase P, Group I and Group II introns, GIR1 branching ribozyme
Vitamine:
Definition: is an organic compound required as a nutrient in tiny amounts by an organism
Properties: Vitamins are classified as either water-soluble or fat soluble.
Examples: Vitamin A, D, E, K (fat soluble), B, C (water soluble).
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Homework:
Why Aristotle, Lazzaros Pallani, Francesco Redi and Louis Pasteur where related?
Abiogenesis is the study how life on Earth could have arisen from inanimate matter. It should not be confused with evolution, which is the study of how groups of living things changed over time. Well, Aristotle, Lazzaros Pallani, Francesco Redi and Louis Pasteur were related because all them studied and were interested of Abiogenesis.
CHEMISTRY
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Webquest!! Homework
1. In the case of alloys its importance is that for some special applicatio…
Webquest!! Homework
1. In the case of alloys its importance is that for some special applications, a metal by itself can not meet certain requirements and therefore it is necessary to combine it with another. An example can be the Stainless steel (steel by itself can not be used in hospitals because it is oxidized and this oxidation can stay and breed bacteria)
2. Now, the plastics is important because it can be recycle, and recycling helps to the environment because it helps to stop the contamination, without the recycling of plastic some products couldn’t be disposable.
3. the polymers are important because now a days all the things around us are made up of polymers, so without it we couldn’t have all this things.
Some new materials in medicine (inorganic materials) are alloys , materials of carbon, glass ceramics and metals. {http://i.ehow.com/images/GlobalPhoto/Articles/2179072/plastics-main_Full.jpg} {http://www.directcarparts.co.uk/images/alloys3.jpg} alloys {http://www.mpip-mainz.mpg.de/~poma/multiscale/hessb-vagelis.jpg} polymers
Webquest!!
Name: Dysprosium {http://www.espi-metals.com/images/Dysprosium.jpg}
Symbol: Dy
CHEMISTRY
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Webquest!!
Name: Dysprosium
Symbol: Dy
Atomic Number: 66
Discovered: Name Origin: From the…
Webquest!!
Name: Dysprosium
Symbol: Dy
Atomic Number: 66 Discovered:Name Origin: From the Greek word dysprositos (hard to get at)
Discovered: in 1886 by
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de Boisbaudran
Electronic Configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 5s2 4d10 5p6 6s2 4f8
Atomic Radius: 178pm
Ionization energy: 571.9 kJ/mole
Electron affinity: 50 kJ/mole
Electronegativity: 1.2
Dysprosium compounds are used in the coatings of many hard disk drives to record digital data as field orientations in nanoscale magnetic domains. Other than that, dysprosium has few applications.
Element coin.
Dave Hamric sells element samples under the name Metallium. He's developed a line of coins struck out of various common and uncommon metals: They are quite lovely, and very reasonably priced, considering the difficulty of creating some of them.
Sources:
http://www.chemicalelements.com/
http://www.chemicool.com/
[[http://www.periodictable.com/ |http://www.periodictable.com/]]http://www.rsc.org/chemsoc/visualelements/PAGES/pertable_fla.htm
CHEMISTRY
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The Smallest Particles:
Originally, it was said that the …
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The Smallest Particles:
Originally, it was said that the atom couldn’t be cut in small particles, but now, it is say that the atom is composed by many subatomic particles:
The electron, it is the least massive of the particles because it only is 9.11 × 10−31kg.
The proton, it has positive charge and its mass is 1.6726 × 10−27kg that is 1,836 times that of the electron.
The neutrons have no electrical charge and have a mass of 1,839 times than of electrons, so the neutron mass is 1.6929 × 10−27 kg.
In the Standard Model of physics, both protons and neutrons are composed of elementary particles:
Quark: belongs to the fermion group of particles, and is one of the two basic constituents of matter.
Gluons: the quarks are held together by the strong nuclear force, which is mediated by gluons (a member of the family of gauge bosons).
I add some pictures of the atomic structure:
Atomic structure
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