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Showing posts from October, 2019

photosensitizers Norberto/Alvaro

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Artificial photosynthesis Applications  by Alvaro, norberto    Photosensitizers are molecules that can be activated by light in order to generate ROS that can damage cell structures from microorganisms or from diseased mammalian cells leading to death. Ideally, photosensitizers should be relatively easy to synthesis as a single pure compound, have low levels of cytotoxicity in the dark, and have no physiological side effects (such as hypotension or hypersensitivity). Moreover, photosensitizers that are activated by longer wavelengths of light, especially in the red and far red, can be of red light into tissues is higher and there is less skin photosensitivity in this region of the spectrum.   The main benefit of artificial photosynthesisi is to produce a hydrogen fuel that will be energy efficient and carbon neutral. It will be a renewable source of energy which can be used for transportation. It will not add any green house gasses into the atmosphere.     Artific

Noah javier

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  Noah Javier                                                                                    the  light-harvesting complex  (or  antenna complex ) is an array of  protein  and  chlorophyll  molecules embedded in .the  thylakoid  membrane of plants and cyanobacteria, which transfer light energy to one. chlorophyll  a  molecule at the  reaction center  of a  photosystem .2` The  antenna pigments  are predominantly  chlorophyll  b ,  xanthophylls , and  carotenes .  Chlorophyll  a  is known as the core pigment. Their absorption spectra are non- overlapping and broaden the range of light that can be absorbed in photosynthesis. The carotenoids have another role as an antioxidant to prevent photo-oxidative damage of chlorophyll molecules. Each antenna complex has between 250 and 400 pigment molecules and the energy they absorb is shuttled by  resonance energy transfer  to a specialized chlorophyll-protein complex known as the  reaction center  of each  photosystem . [1]  The reac

Water-oxidizing catalysts Laisha and Karen

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Water-Oxidation catalysts  By: Laisha and Karen Water oxidation catalysts is the acceleration of the conversion of water into oxygen and protons:  2 H₂O → 4 H⁺ + 4 e⁻ + O₂. Many catalysts are effective, both homogeneous catalysts and heterogeneous catalysts. The oxygen evolving complex in photosynthesis is the premier example. There is no interest in generating oxygen by water oxidation since oxygen is readily obtained from air. Instead, interest in water oxidation is motivated by it's relevance to water splitting, which would provide "solar hydrogen". An example is ruthenium, iridium, manganese, and cobalt, have been widely developed as  water oxidation catalysts.  Among them, ruthenium‐based molecular  catalysts  are the most studied and extremely active, with a low over potential and high  catalytic  turnover frequency https://www.youtube.com/watch?v=kVeoCJEmA6U

Photoelectrochemical Cell Could Generate Methanol by ValeX Angie

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Photoelectrochemical Cell Could Generate Methonal Angelina, ValeriaX      Methonal is generated In the fuel cell  the fuel  is not burned, but rather is turned into electricity through an electrochemical process that splits methonal  into protons, electrons, and carbon dioxide at the anode and then come together to create these protons and electrons with oxygen at the cathode to produce water.       A photelectrochemical  cell  Water-splitting photoelectrolytic  photoelectrochemical cells  (P.E.Cs) use light energy to take out the hydrogen from water within a two-electrode  cell . Some researchers say three arrangements of photo-electrodes to create P.E.Cs, and they believe it exists photo-anode made of a n-type semiconductor and a metal cathode.      Instead of letting out just hydrogen in the photosynthesis process, the  photoelectrochemical cell could generate methanol  fuel (CH 3 OH).  Methanol , or  methyl alcohol , is almost always added to the methane in natural gas

Biomimetics 8a Yaretzy & Daiana

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               Biomimetics  What is a Biometics? Biomimetics  or  biomimicry  is the imitation of the models, systems, and elements of nature for the purpose of solving complex  human  problems. Biomimetics has given rise to new technologies inspired by  biological  solutions at macro and nanoscales. Humans have looked at nature for answers to problems throughout our existence. Nature has solved engineering problems such as self-healing abilities,   environmental exposure tolerance and resistance.
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                       Water Oxidizing catalysts                                                                     w hat is water oxidizing  catalysts                  Water oxidation catalysis  WOC  is the acceleration catalysis  of the conversion of  water  into oxygen and protons: 2 H 2 O → 4 H +  + 4 e −  + O. Many  catalysts  are effective, both homogeneous  catalysts  and heterogeneous  catalysts . The oxygen evolving complex in photosynthesis is the premier example                                   what can oxidizing be use for                  The first water oxidation catalyst containing only vanadium atoms as metal centers is report. IT can be use for motors and metal things like chairs chains and also trains.
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                                                                       photosynthesis by kenya and keila                                                            PHOTOSYNTHESIS         Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities.                                                      HYDROGEN VEHICLE                 A  hydrogen  vehicle is a vehicle that uses  hydrogen  fuel for motive power. ... The power plants of such vehicles convert the chemical energy of  hydrogen  to mechanical energy either by burning  hydrogen  in an internal combustion  engine , or, more commonly, by reacting  hydrogen  with oxygen in a fuel cell to run electric motors.

Wave power by Kenya and Keila

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                                              WAVE POWER                               Keila , Kenya                                              HOW IS WAVE POWER PRODUCED? Wave power is produced when electricity generators that are placed on the surface of the ocean. The energy that is provided is most often used in desalination plants, power plants, and water pumps.                                                HOW WAVES GENERATED ? Wave transmits energy, NOT WATER, across the ocean and is not blocked by anything, it has the potential to cross the ocean (world) waves are most commonly caused by wind ,and wind driven waves, or surface waves , are created by the friction between wind and surface water                              HOW ARE WAVES CONVERTED INTO ENERGY? The sun heats up in diffrent places around the globe,that creates wind that blows over ocean surfaces, and the and creates surface waves like when a plane crashes on a beach the waves change in sizes (to
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Solar energy — power  from the sun—is a vast, inexhaustible, and clean resource. Sunlight, or  solar energy , can be used directly for heating and lighting homes and businesses, for generating electricity, and for hot water heating,  solar  cooling, and a variety of other commercial and industrial uses.                   Photosynthesis  in plants converts  solar energy  into chemical  energy  using electrons and protons from water. The process of  photosynthesis  in plants involves a series of steps and reactions that use  solar energy , water, and carbon dioxide to produce organic compounds and oxygen https://www.youtube.com/watch?v=3pD68uxRLkM

Tundra Biome Internal and External animal Fertilization By Isaiah Trujillo

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  For species with  internal fertilization , there is great variation in the development stage at which offspring are released.  fertilized  eggs, larvae, juvenile  fish , or even sexually mature adults. Oviparous  bony fishes  release eggs, and the developing embryo is nourished by a yolk sac. Like all reptiles, saltwater crocodiles reproduce via internal fertilization, and females carefully look over their nests after laying a clutch of approximately 50 eggs. Cooler nests produce mostly females, while warmer nests produce mostly males.                                              External Animals. The majority of  corals  are considered hermaphroditic broadcast spawners, a type of  external fertilization . Broadcast spawners, sometimes referred to as mass spawners or synchronous spawners, release both sperm and eggs into the water at the same time figure 5-1. Some  corals  release buoyant egg and sperm bundles.