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    Plastids

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    PLASTIDS  Plastids are large cytoplasmic organelles.  Plastids are major organelles found in the cells of plants and algae. Plastids are the site of manufacture and storage of important chemical compounds used by the cell. Plastids often contain pigments used in photosynthesis‚ and the types of pigments present can change or determine the cell’s colour.  The term plastid was derived from the Greek word plastikas meaning formed or moulded.  This term was coined by Schimper in 1885.   In plants

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    A&P I Skeletal lecture 1

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    Chemistry: It is the science concerned with the atomic composition of substances‚ elements and their interactions‚ and the formation‚ decomposition and properties of molecules. -Biological chemistry or Biochemistry is the biological or physiological chemistry of living organisms and of the chemical changes occurring therein. Structure of Matter: All living and nonliving things are composed of matter. Matter; is anything that occupies space and has mass. Mass is the amount of matter in an object

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    Supernova and Tc

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    neutrino emission from the recent onset of the breaking and formation of neutron Cooper pairs in the 3 P2 channel. We find that the critical temperature for this superfluid transition is ’ 0:5 Â 109 K. The observed rapidity of the cooling implies that protons were already in a superconducting state with a larger critical temperature. This is the first direct evidence that superfluidity and superconductivity occur at supranuclear densities within neutron stars. Our prediction that this cooling will continue

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    employed to identify an unknown amino acid. A titration curve is the plot of the pH versus the volume of titrant used. In the case of amino acids‚ the titrant will be both an acid and a base. The acid is a useful tool because it is able to add a proton to the amine group (see fig. 1). Likewise the base allows for

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    Chemistry Cousework

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    solutions contain OH⁻ (aq) ions. This OH⁻ (aq) ion is cancelled out by the H⁺ (aq) ion. e.g. H⁺ (aq) + OH⁻ (aq) = H₂O (l) The acid and alkali are neutralised to make water. An H⁺ ion is just a proton. Acid reacts by giving protons (H⁺) and so are proton donors Alkalis react by receiving protons and so are proton acceptors Using this science‚ I conducted an experiment on how a specific factor affects the pH changes during a titration. I added a specific amount‚ type‚ and concentration of acid to an

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    C. Neutron D.

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    one of which is The other product is ________. A. B. C. D. E. 2. The decay of to occurs through the emission of a(n) ________. A. alpha particle B. beta particle C. neutron D. proton E. positron 3. Radionuclides which have too low of a neutron/proton ratio generally decay through ________. A. beta emission B. electron capture or positron emission C. gamma ray emission D. alpha emission E. neutron absorption 4. How many neutrons does have? A.

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    Science Atoms Study

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    the atom) Positively charges protons and neutrally charged (non-charged) neutrons are found in the nucleus Negatively charged electrons are located orbiting the nucleus in shells. They stay in orbit because the electrons are attracted to the protons 2: The Element Introduction An element is a singular type of atom‚ like candy in a candy shop If there is an atom that has 8 protons and 8 electrons‚ then it is an oxygen element. If it has 1 proton and 1 electron‚ then it is a hydrogen

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    Vanadium

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    atomic mass of 50.9414 g.mol 1 and an atomic number of 23. It is a soft white substance that can be found with many different minerals. Vanadium has 4 energy levels‚ the first energy level contains two protons‚ the second contains 8 protons‚ the third contains 11 protons and the fourth contains 2 protons. Vanadium is a metal that is commonly found in jet engines‚ high speed airframes‚ and ferrovanadium‚ a steel additive. Vanadium is toxic to humans and animals. Vanadium is present in foods such as buckwheat

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    power because it can decay naturally by alpha radiation and release alpha particles. (Two protons and two neutrons). Also‚ Uranium-235 can undergo induced fission. This means when a free neutron collides with a U-235 nucleus‚ the nucleus will obtain the neutron and split it very quickly. The protons and neutrons in the nucleus of a uranium atom are split by the energy known as nuclear binding energy. Protons and neutrons binding energies are the energies required to release them from the nucleus

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    Biology 1 Quiz

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    Biology 100 Quiz 1 1.  Which is the smallest unit of life that can survive and reproduce on its own?  x | a cell |   | a molecule |   | an organ |   | a population |   | an ecosystem | 2.  The instructions in DNA are used to make  x | proteins |   | carbohydrates |   | DNA |   | energy |   | homeostasis | 3.  The chemical processes in the living cell are collectively called   | adaptation |   | homeostasis |   | evolution |   | respiration | x 

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