Notes, abstracts, papers, exams and problems of Physics to Training

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Notes Segunda

Clasified in Notes of Physics of Training.

Written at August 27, 2009 on enEnglish with a size of 1,298 bytes.

The cell cycle: sequence of cellular growth and division.
5 phases=
1.First growth(the cell grows.)
2. Synthesis(dna is copied)
3. Second growth(prepares the nucleus to divide)
4. Mitosis(the nucleus divides)
5. Cytokinesis(cytoplasm divides)
CONTROL of the cell cycle during the checkpoints.
1.first growth checkpoint
2. second growth checkpoint
3. mitosis checkpoint
WHEN CONTROL IS LOST=CANCER.


MITOSIS= the chromatids on each chromosomes phsisically moved to opposite poles of the dividing cell helped by the SPINDLE(cell structure made of centrioles and proteins[microtubes}.
PROPHASE=THE NUCLEUS DISOLVES
METAPHASE=chromosomes aling in the equator of the cell.
ANAPHASE=chromatids move toward opposite poles.
Telophase=nuclear envelope forms, cytokinesis occurs.
MEIOSIS= formation of haploid cells. Gametes are haploid cuz they have 1 set of chromosomes.
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Notes Nolose

Clasified in Notes of Physics of Training.

Written at October 13, 2009 on enEnglish with a size of 463 bytes.

EXPELENTE, i want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you nowi want to buy the camera from you now

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Notes 2

Clasified in Notes of Physics of Training.

Written at October 22, 2009 on enEnglish with a size of 1,321 bytes.

Some ions formed by transition metal dont hace noble gases electron configuration, they are EXCEPTIONS TO THE OCTET RULE. their configuration is know as=PSEUDO-NOBLE GASES.
formation of ions= an anion is an atom or group of atoms with a negative charge. The gain of electrons by a neutral atom produces an anion. The goal is to attain noble gas electron configuration but but in this case gainin electrons.
Ions that are produced when halogen atoms gain electrons are called HALID IONS.

Ionic compounds= compounds composed of cations and anions(metal cations & non metal cations). Although they are composed of ions, an ionic compoun is electrically NEUTRAL cuz the total positive charge of the cation equals the total negative charge of an anion.
Ionic bonds=anions and cations have opossiye charges and attract one another by means of electrostatic forces. Those elctrostatic forces are the ionic bonds.
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Notes Pasiva

Clasified in Notes of Physics of Training.

Written at June 01, 2009 on enEnglish with a size of 1,619 bytes.

P.Simple writes/write is/are written
P.Contin is/are writing is/are being written
Pas.Sim wrote was/were written
Pas.Cont was/were writing was/were being written
Prs.Perf. has/have written has/have been written
Past.Perf had written had been written
Futu.Simp will write will be written
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