Problem Set - Small Molecules (Campbell Chapters 2 and 3) 1. What are the SPONCH elements and what is common among these elements that make them suitable for life? State the four most frequently occurring of the SPONCH elements. Which of the SPONCH elements is found in each of the large biomolecules (carbohydrates‚ proteins‚ lipids‚ nucleic acids). The SPONCH elements are Sulfur‚ Phosphorus‚ Oxygen‚ Nitrogen‚ Carbon and Hydrogen. These are the five key elements that compose living
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Pulmonary surfactant is a substance found on the alveolar wall that lowers alveolar surface tension. This decreases the muscle effort required to open and ventilate the lungs. Natural‚ endogenous surfactant is a compound composed of phospholipids‚ neutral lipids‚ and proteins that forms a layer between the alveolar surface and the alveolar gas and reduces alveolar collapse by decreasing surface tension within the alveoli. Surfactant replacement therapy rescue treatment a few hours after birth in
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patients with multiple traumatic injuries are susceptible to pulmonary contusion. A pulmonary contusion is an injury to the lung which is a common result after a blunt chest trauma from incidents such as vehicular accidents and assaults or after penetrating chest trauma from explosions or shock waves (Ganie et al‚ 2013). Also‚ although it is more commonly associated with chest traumas such as pneumothorax‚ rib fractures or hemothorax‚ pulmonary contusion is also related to trauma to the abdomen and nervous
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|Part of haemoglobin which transport oxygen | Water Water provides an environment that • Has a fairly stable temperatures • Is transparent so that light can penetrate for plant Polar substances which can dissolves in water are called hydrophilic while non-polar substances which do not interact with water are called hydrophobic Water as an universal solvent Ions and polar molecules are charged. They are attracted to water molecules because of the weak positive and negative
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TRACE EVIDENCE AS AN IMPORTANT TOOL UNDER FORENSIC SCIENCE Introduction Edmond Locard‚ founder of the Institute of Criminalistics at the University of Lyon‚ France‚ developed what has become known as Locard’s Exchange Principle. This states that “every contact leaves a trace”‚ implying that a criminal will leave trace and take away trace evidence when at a crime scene. Trace evidence often refers to minute samples of a substance‚ particularly fibres‚ hairs‚ glass fragments and paint chips. Crime
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Trace or transfer evidence can be any small‚ and to the untrained be a seemingly insignificant piece of material‚ whether man-made or natural‚ that has been left at a crime scene. Edmond Locard‚ founder of the Institute of Criminalistics at the University of Lyon‚ France‚ developed what has become known as Locard’s Exchange Principle. This states that every contact leaves a trace (Trace Evidence). Trace evidence can consist of just about anything. Some types of trace evidence include but are not
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Trace Evidence Trace evidence is an important part of a team in solving crimes in forensic investigations. According to Edmond Locard‚ there is specific that no matter wherever people interact with their environment or is physically involved in a crime often leaves something at or something away from the scene. Those in this category of evidence include many diverse types of macroscopic or microscopic materials that certain examples are easily visible to our “naked eye”. The subject is broad and
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Modeling Molecules Introduction: You can represent a molecule two-dimensionally‚ as a structural formula or electron dot structure. Although such models are useful in certain contexts‚ they do not accurately represent bond angles between atoms or shapes of molecules. In this activity‚ you will construct three-dimensional models of several molecules. You will use electron dot structures and structural formulas to inform how you construct the three-dimensional models. Materials: jelly beans
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Understanding Pulmonary Hypertension The human body is a very complex organism composed of different types of systems and functions. All the functions that each system has‚ is what makes possible for the body to obtain life. One of the most important systems in one’s body is the circulatory system‚ where the heart‚ the lungs‚ and the blood vessels work together to form the circle part of the circulatory system. The pumping of the heart forces the blood on its journey. The body’s circulatory system
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molecule of water A chemist’s view of the world is not as narrow as one might think! Yes‚ we start with the atom‚ and then go on to the rules governing the kinds of structural units that can be made from them. We are taught early on to predict the properties of bulk matter from these geometric arrangements. And then we come to H2O‚ and are shocked to find that many of these predictions are way off‚ and that water (and by implication‚ life itself) should not even exist on our planet! But we soon
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