1 Molecular-Orbital Theory Introduction Orbitals in molecules are not necessarily localized on atoms or between atoms as suggested in the valence bond theory. Molecular orbitals can also be formed the LCAO where more than two atomic orbitals are used. (Technically‚ we can use all of the atomic orbitals in the LCAO.) Linear combinations of orbitals result in the interference of waves. Both constructive and destructive interference may result. Within a diatomic molecule‚ N atomic orbitals
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If you have ever considered losing weight‚ you have probably heard of the various kinds of diet pills available. Diet pills claim to "melt away the fat." They sound like the perfect solution to shed a few pounds‚ but research tells a different story. Diet pills became popular in 1996. The most common ingredients were Redux and fenfluramin/phentermine‚ which posed as appetite suppressants. The pills seemed to suck up the fat‚ and people were losing anywhere between 25-50 pounds in months. The FDA
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Kinetic Molecular Theory Basic Concepts The gas laws developed by Boyle‚ Charles‚ and Gay-Lussac are based upon empirical observations and describe the behavior of a gas in macroscopic terms‚ that is‚ in terms of properties that a person can directly observe and experience. An alternative approach to understanding the behavior of a gas is to begin with the atomic theory‚ which states that all substances are composed of a large number of very small particles (molecules or atoms). In principle‚ the
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Depression is a serious mental health concern that will touch most people’s lives at some point in their lifetime (either directly or through someone close they know). The suffering endured by people with depression and the lives lost to suicide attest to the great burden of this disorder on individuals‚ families‚ and society. Improved recognition‚ treatment‚ and prevention of depression are critical public health priorities. Organizations such as the National Institute of Mental Health (NIMH)‚ one
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arena. I had my first glimpse at molecular biology then. But that brief introduction to molecular biology was enough to compel me to the idea that I want to spend my whole life working and conducting research on it. That passion and zeal brought me to where right now I am. I have successfully completed my masters from the Department of Genetic Engineering and Biotechnology‚ University of Dhaka. I want to note that very few universities offer courses related to molecular biology here in Bangladesh but
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Ch 10 weight management * Explain body comp and metabolic rate - depends on body size‚ composition‚ gender‚ diet‚ age‚ genes‚ hormones and activity level. -body comp = % of body fat and lean body mass [LBM] (ratio of fat tissue to nonfat tissue in body) [LBM = muscles bones and organs.] - 2 types of body fat - 1. Essential and needed for functioning // 2. Storage and can b lost thru exercise (1lb of fat= 3500 cal.) - metabolism refers to how the body utilizes fuel from nutrients (food)
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Ultra thin film coatings can be used in a wide range of applications as lubricants‚ anti-stiction layers‚ molecular glues‚ coupling agents or adhesion layers. The mentioned molecular coatings are used to modify material surface properties. The traditional coating deposition methods consist of a set of sequential wet baths. The wet processing method is complex and limits the ability of molecular coating in many MEMS applications. The use of liquid precursors has extremely limited bath life‚ which cause
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Who: the entire United States What: the bottom fell out of the market‚ and shareholders frantically tried to sell before the prices plunged. 16.4 billion shares were dumped that day. People who bough stocks on credit were stuck with huge debts‚ and others lost most of their savings. Why: because panicked investors unloaded their shares at the same time When: October 29‚ 1929 (by mid November investors lost about $30 billion) Where: the stock market Hawley- Smoot Tariff Who: congress passed
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This chapter discusses the importance of weight management. The most affective way of managing your weight is by controlling the amount of calories that your body consumes with the amount of exercise that you get in your daily activities. Currently about 66% of Americans are overweight. This number has nearly doubled since the year of 1980. There are two types of fats‚ subcutaneous fat‚ visceral fat. Subcutaneous fats are called lipids which affect your nerves‚ brain lungs‚ heart and
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THE MOLECULAR BASIS OF INHERITANCE I. History A. Discovery of “transformation” – a change in genotype and phenotype due to the uptake of external DNA by a cell 1. Griffith 1920s did experiments with Streptococcus pneumoniae (p294 fig16.2) a. took two strains of S. pneumoniae‚ one virulent‚ one not b. heat killed virulent strain‚ then mixed them with the living nonvirulent strain c. living nonvirulent strain became virulent d. nonvirulent strain took on virulent strain’s DNA became virulent
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