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‚ 2009)
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What Makes us Human? HSP3M: Introduction to Anthropology‚ Psychology and Sociology Mrs. Maxwell Aaron Lo June 8‚ 2012 What makes us Human? This is the ultimate question in which social scientists are still trying to solve today. This question is one which stumps Anthropologists‚ Psychologists and Sociologists alike‚ as the question itself is said to have originated from Aristotle himself while others argue that it was always there. As even more facts about this topic rise even more as social
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of high school in order to get a job to help support the family. Some after a while try to go back to school but according to the Department of Education “Only 41 percent pf low-income students entering a four-year college managed to graduate within five years‚ but 66 percent of high-income students did”(Leonhardt pg 1). By not being able to continue their education they are put in the position where as they are not equipped with many important skills that they can use to get higher paying jobs. The
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metabolism of alcohol‚ we should know that what is alcohol‚ how is it affect human body. Alcohol is being considered one of the most commonly used drugs because it has adverse impacts on human’s health through how it’s metabolized. Alcohol is a compound of hydrogen‚ carbon and oxygen‚ which can be combined in many different ways. The commonest as known as ethyl ethanol‚ which is a specific alcohol compound (C2H5OH) and formed from the fermentation of yeast‚ sugars and starches. This
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are humans because of evolution. The portion of DNA that is responsible for the structure of proteins is 99.4% common in humans and chimpanzees. Anthropologists say that we are humans because of evolution. The portion of DNA that is responsible for the structure of proteins is 99.4% common in humans and chimpanzees. The dictionary says that human beings are individuals of the genus Homo‚ or more specifically‚ Homo sapiens. That only answers the anthropological aspect of what makes us human.
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constituent compounds discovered in past centuries - although not all aromatic compounds known today share the same distinction (many are in fact‚ odorless or even unpleasant)‚ they are the principle components in such pleasant smelling substances as cinnamon‚ licorice‚ wintergreen‚ clove & vanilla CLASSIFICATION – - also known as arenes‚ many aromatic compounds possess the benzene ring functional group: G’s FG = aromatic compound or arene benzene ring or aryl grp - other compounds which do
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Grade 10 Science –Chemistry Ionic Compounds Science Perspectives 10 - Section 5.6 Pages 192-195 Compound • A Pure Substance composed of two or more elements in a FIXED RATIO Ionic Compound • A compound made up of one or more positive metal ions (cations) and one or more negative non-metal ions (anions) Ionic Bond • The simultaneous strong attraction of positive and negative ions in an ionic compound. As noted‚ ionic bonding occurs between metals and non-metals. Yet‚ “why
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is the culture that makes it up. The Na’vi is an entirely made up and brand new culture with language‚ norms‚ relationships‚ religion‚ and beliefs. Western civilization tries to move in on their land and their ways‚ believing the Na’vi are savage and primordial who must be living in the past due to their lack of modern technology uses and spending their every day and night in nature. The Na’vi have very close ties to their ancestors and believe that they themselves make up the land. Their life
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The human body has the ability to understand the environment around it by using its senses. The five basic human senses are hearing‚ sight‚ touch‚ smell‚ and taste. Anytime one of these senses is triggered by a specific stimulus the signal is transmitted to the brain in order for the information to be interpreted. This transmission process is known as perception. First the body will experience an external stimulus‚ the sensation. Then this information will be transformed into electrical stimulation
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1. An organic compound X with a molecular formula C2H6O undergoes oxidation with in presence of alkaline KMnO4 to form a compound Y. X on heating in presence of Conc. H2SO4 at 443K gives Z. Which on reaction with H2Oin presence of H2SO4 gives back `X` `Z` reacts with Br2 (aq) and decolorizes it. Identify X‚ Y‚ & Z and write the reactions involved. 2. An organic compound ‘A’ is widely used as a preservative in pickles and has a molecular formula C2H2O2. This compound reacts with ethanol to
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