Tetrapyrrole compounds: chlorophyll and heme groups By Erwin Lim 1. Tetrapyrrole compounds A tetrapyrrole compound is a chemical group that consists of four pyrroles that are joined together by covalent bonds‚ forming a porphyrin ring. They are naturally occurring pigments‚ which are used in many biological processes (Berg‚ 2009). The basic structure of a tetrapyrrole is as seen in Figure 1‚ while the basic structure of a pyrrole is as seen in Figure 2. Figure 1.Tetrapyrrole Compound (Berg
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E. Biology 227 03/28/2014 Food and health How important is your health? Would you consider yourself a health conscious type of person‚ or perhaps a person who eats anything that is served? Now and days obesity is a major problem in our society‚ many factors may contribute to this problem but mostly is due to the food that we consume. Therefore‚ I would like to discuss the role of diet in our daily lifestyles‚ also some differences between a plant based diets versus a diet
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indicator on it. The powder absorbs moisture from the soil‚ allowing the colour of the indicator to be clearly seen. • 2. ACIDS IN THE ATMOSPHERE Identify natural and industrial sources of sulfur dioxide and oxides of nitrogen. Oxides of nitrogen are: Nitrous oxide (N2O)‚ Nitric oxide (NO) and Nitrogen dioxide (NO2) SULFUR DIOXIDE Natural sources: Volcanoes‚ geothermal hot springs Industrial sources: Combustion
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carbon monoxide‚ nitrogen oxide‚ sulfur dioxide‚ volatile organic compounds‚ and particulate matter. Carbon monoxide is very harmful to the environment. It is made by the incomplete combustion of fuels or other carbon-containing substances. Different types of transportation make Ten percent of all carbon monoxide. A large source of carbon monoxide was found in south-central Africa and the Amazon region of South America because of the mass burning of biomass. Nitrogen oxide is another form of toxin
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acid + metal -------->salt + hydrogen acid + metal oxide--->salt + water acid + metal carbonate---->salt + water + carbon dioxide Element | Symbol | Valency | Hydrogen | H | 1 | Oxygen | O | -2 | Carbon | C | 4 | Calcium | Ca | 2 | Iron | Fe | 2 | Aluminium | Al | 3 | Sodium | Na | 1 | Potassium | K | 1 | Magnesium | Mg | 2 | Zinc | Zn | 2 | Copper | Cu | 2 | Silver | Ag | 1 | Lead | Pb | 2 | Chloride | Cl | -1 | Sulphate | SO4 | -2 | Hydroxide | OH
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arterial pressure and rapid death of the animal‚ implicating its role in symptom development and lethality” (1). Interestingly‚ when mice are introduced to LPS along with a nitric oxide synthase inhibitor (such as LDL cholesterol or estrogen)‚ it is reported to diminish the endotoxic activity of LPS. This suggests nitric oxide production (dependent on TNF-alpha stimulation) is responsible for endotoxic shock seen in response to Vibrio vulnificus
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Laughter: The Best Medicine Laughter reduces pain‚ increases job performance‚ connects people emotionally‚ and improves the flow of oxygen to the heart and brain. By Hara Estroff Marano‚ published on April 05‚ 2005 - last reviewed on June 21‚ 2005 Laughter‚ it’s said‚ is the best medicine. And there’s lots of evidence that laughter does lots of good things for us. It reduces pain and allows us to tolerate discomfort. It reduces blood sugar levels‚ increasing glucose tolerance in diabetics and nondiabetics
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addition‚ acid rain accelerates the decay of building materials and paints‚ including irreplaceable buildings‚ statues‚ and sculptures that are part of our nation’s cultural heritage. Prior to falling to the earth‚ sulfur dioxide (SO2) and nitrogen oxide (NOx) gases and their particulate matter derivatives—sulfates and nitrates—contribute to visibility degradation and harm public health. Acid rain causes acidification of lakes and streams and contributes to the damage of trees at high elevations (for
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catenation. xi) Nitric acid cannot be used to prepare H2S xii) Phosphine is prepared in inert atmosphere of carbon dioxide. xiii) Phosphorous pentaoxide is used in the preparation of N2O5. xiv) Red phosphorous is used for making matches. xv) The electro negativity of both nitrogen and chlorine is the same. But nitrogen is inert at room temperature whereas chlorine is highly reactive. xvi) Pure PH3 does not burn but impure sample of PH3 burns in air xvii) Nitric acid turns yellow
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key component of the preparation – nitrogen oxides. When the substance released from the nerve endings of the human‚ it causes blood vessels to relax and pass more blood‚ resulting in an erection in men. The same effect was observed in each of the tested plants. So‚ Viagra can even get special mission on the garden market – the drug can be used as an easy way to easily grow large flowers. 5. Increase the growth rate for underweight babies Nitric oxide not only helps to get an erection and grow beautiful
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