Announcing #IWriteBecause - A Campaign For Writers

Announcing #IWriteBecause - A Campaign For Writers Announcing #IWriteBecause: A Campaign For Writers, By Writers The pinnacle of a writer’s life may not ever be a tearful speech at the Oscars. (â€Å"I want to thank my ergonomic keyboard for not giving me carpal tunnel.†) However,  though it might not take the form of a miniature golden statue, all writers possess inspirations that drive them to put pen to paper. So what's yours?We know that words are powerful - and now more than ever, we can use our words to get the message of writing out and do good. Perhaps one day a child who watches your video will be able to say that #TheyAlsoWriteBecause.How  can you contribute to #IWriteBecause?Submit your short, one-minute video via the campaign site, and tell us your reasons for writing. In doing so, you’ll be joining writers of all stripes who already sent in videos, including bestselling author Mark Dawson, award-winning food and travel writer Joanna Pruess, USA Today bestselling author Carter Wilson, New York Times bestseller David Heinemeier Hansson, and popular BookTuber Hailey LeBlanc.We’re featuring a couple of videos every day on the site, so feel free to browse through other writers’ stories! The whole is greater than the sum of its parts, or so they say.Here are a few questions to get you started:Why do you write?What do you love the most about writing?What do you get out of writing?What do you want to achieve by the end of your career as a writer?So grab your phone or a camera now. You can change a child's life for the better. All it takes is a minute to fill in the blank and say via video: I write, because ___________.Why do you write? This is your chance to tell us. Send us a video through the campaign site  and contribute to the movement.

Active Transport Essays - Cellular Respiration, Metabolism

Active Transport Essays - Cellular Respiration, Metabolism Active Transport Since the cell membrane is somewhat permeable to sodium ions, simple diffusion would result in a net movement of sodium ions into the cell, until the concentrations on the two sides of the membrane became equal. Sodium actually does diffuse into the cell rather freely, but as fast as it does so, the cell actively pumps it out again, against the concentration difference. The mechanism by which the cell pumps the sodium ions out is called active transport. Active transport requires the expenditure of energy for the work done by the cell in moving molecules against a concentration gradient. Active transport enables a cell to maintain a lower concentration of sodium inside the cell, and also enables a cell to accumulate certain nutrient inside the cell at concentrations much higher than the extracellular concentrations. The exact mechanism of active transport is not known. It has been proposed that a carrier molecule is involved, which reacts chemically with the molecule that is to be actively transported. This forms a compound which is soluble in the lipid portion of the membrane and the carrier compound then moves through the membrane against the concentration gradient to the other side. The transported molecule is then released, and the carrier molecule diffuses back to the other side of the membrane where it picks up another molecule. This process requires energy, since work must done in transporting the molecule against a diffusion gradient. The energy is supplied in the form of ATP. The carrier molecules are thought to be integral proteins; proteins which span the plasma membrane. These proteins are specific for the molecules they transport. Chemiosmosis Populating the inner membrane of the mitochondrion are many copies of a protein complex called an ATP synthase, the enzyme that actually makes ATP! It works like an ion pump running in reverse. In the reverse of that process, an ATP synthase uses the energy of an existing ion gradient to power ATP synthesis. The ion gradient that drives oxidative phosphorylation is a proton (hydrogen ion) gradient; that is, the power source for the ATP syntheses is a difference in the concentration of H+ on opposite sides of the inner mitochondrial membrane. We can also think of this gradient as a difference in pH, since pH is a measure of H+ concentration. The function of the electron transport chain is to generate and maintain an H+ gradient. The chain is an energy converter that uses the exergonic flow of electrons to pump H+ across the membrane, from the matrix into the intermembrane space. The H+ leak back across the membrane, diffusing down its gradient. But the ATP synthases are the only patches of the membrane that are freely permeable to H+. The ions pass through a channel in an ATP synthase, and the complex of proteins functions as a mill that harnesses the exergonic flow of H ' to drive the phosphorylation of ATP Thus, an H+ gradient couples the redox reactions of the electron transport chain to ATP synthesis. This coupling mechanism for oxidative phosphorylation is called chemiosmosis, a term that highlights the relationship between chemical reactions and transport across the membrane. We have previously used the word osmosis in discussing water transport, but here the word refers to the pushing of H+ across a membra! ne. Certain members of the electron transport chain must accept and release protons (H+) along with electrons, while other carriers transport only electrons. Therefore, at certain steps along the chain, electron transfers cause H+ to be taken up and released back into he surrounding solution. The electron carriers are spatially arranged in the membrane in such a way that H+ is accepted from the mitochondrial matrix and deposited - the intermembrane space. The H+ gradient that results is referred to as a proton-motive force, emphasizing the capacity of the gradient to perform work. The force drives H+ back across the membrane through the specific H+ channels provided by ATP synthase complexes. How the ATP synthase uses the downhill H+ current to attach inorganic phosphate to ADP is not yet known. The hydrogen ions may participate directly in the reaction, or they may induce a conformation change of the ATP synthase that

Global Warming in South Florida Essay Example | Topics and Well Written Essays - 1000 words

Global Warming in South Florida - Essay Example The corrosion or depletion of the ozone layer allows the infrared radiations into the earth in a large amount. The gas also absorbs much of these radiations and because they are atmospheric gases they warm the planet hence global warming. Land use in many parts of the world has resulted to these changes in the atmospheric temperatures. Deforestation has been ranked first as a major cause. Forest plays a very important role on the control of carbon dioxide gas in the air. In other terms, it is referred to as the greenhouse gas cycle. In this cycle, plants do take in oxygen during the day and releases it in the night (Aston). Cutting down of trees breaks this cycle, therefore, most of the gases released in the atmosphere remains there influencing the global warming. South Florida is one of the parts in the city which have not appreciated this fact and continue to destroy the forest so that they can develop settlement. Developed countries are the majority of the nations on earth which have been experiencing temperature variations due to global warming. This is because they are the ones which use much of the fossil fuels such as petroleum in their industries. Although Florida does not so many heavy industries which emit the greenhouse gases into the atmosphere, the effects of global warming are so much evident. For example, the smoke released from the cars does form heavy smog in the air when it mixes with fog. In United States of America, the southern region of State of Florida takes the lead on the consequences the increased global heat. This is because of its strategic location as it borders the Pacific Ocean. This is because oceans are very important measures of the effects of global warming. The effects global warming is so vivid in major parts of the world and it willed is discussed in relation to South Florida. One of the consequences of increased global heat is the increase in thermal heat. It has been established that the